Folding rack of folding field returning machine

Abstract

The utility model relates to the technical field of folding returning machines, in particular to a folding machine frame of a folding returning machine, which comprises a gantry mechanism, folding suspension frames, telescopic driving pieces and a transmission mechanism, the folding suspension frames are arranged on two side end faces of the gantry mechanism, and the telescopic driving pieces are arranged on the two side end faces of the gantry mechanism corresponding to the folding suspension frames. The two telescopic driving pieces drive the two folding suspension frames to rotate between the folding position and the unfolding position, a gearbox of the transmission mechanism is arranged on a gearbox fixing plate of the gantry mechanism, the gearbox fixing plate is connected with the gantry mechanism in a welded mode, and a reinforcing plate is arranged below the gearbox fixing plate. The reinforcing plate is connected with a supporting pipe of the gantry mechanism and a gearbox fixing plate in a welded and reinforced mode, the second-stage transmission shaft is installed in a transmission box arranged on the folding suspension frame, the gearbox and the second-stage transmission shaft are connected through the first-stage transmission shaft, and the first-stage transmission shaft is protected inside by the telescopic protective cover.

Description

Technical Field

[0001] The utility model relates to the technical field of foldable field returning machines, in particular to a foldable frame of a foldable field returning machine. Background Art

[0002] There are few models of high-horsepower tillage machines in China. The folding tillage machine can unfold or fold the machine body according to the needs of use, which is convenient for transportation, improves the road pass rate, and does not affect traffic. The folding tillage machine needs to be unfolded or folded frequently when transporting or connecting with a tractor, and the machine itself has a large load. The existing gantry structure is prone to deformation and wear due to long-term use; in addition, the existing transmission shaft guard is integrated and cannot be extended to change its length. When the folding tillage machine is unfolded or folded, the position and connection state of the guard will change. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a folding frame of a folding farmland returning machine. A gearbox mounting platform is arranged on the gantry mechanism to improve the overall strength of the gantry mechanism. The transmission mechanism adopts a primary transmission shaft and a secondary transmission shaft to cooperate. The state of the primary transmission shaft changes with the folding or unfolding of the folding suspension frame, and the primary transmission shaft is protected by a telescopic shield.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a folding frame of a folding field returning machine, including a gantry mechanism, a folding suspension frame, a telescopic driving member and a transmission mechanism, the gantry mechanism is provided with a transmission giving way port, the rear end face of the gantry mechanism is provided with a pull plate connecting member and a gearbox mounting platform, and the front end face of the gantry mechanism is provided with a three-point suspension mechanism; the two side end faces of the gantry mechanism are connected to the folding suspension frame, the folding suspension frame is provided with a field returning machine mounting position and the folding suspension frame is connected to the transmission box, the two side end faces of the gantry mechanism are provided with telescopic driving members, the telescopic parts of the two telescopic driving members are respectively connected to the two folding suspension frames and the two telescopic driving members respectively drive the two folding The folding suspension frame rotates between the folding position and the unfolding position; the transmission mechanism includes a gearbox, a primary transmission shaft, a secondary transmission shaft and a telescopic shield, the gearbox is arranged on the gearbox mounting platform, the power receiving part of the gearbox extends into the transmission clearance port, the two opposite end faces of the gearbox are provided with power transmission parts, each power transmission part is connected to the primary transmission shaft through a universal coupling, each transmission box is provided with a secondary transmission shaft, one end of the secondary transmission shaft is connected to the corresponding primary transmission shaft through a universal coupling, the other end extends out of the transmission box and is provided with a power output part, the telescopic shield is arranged outside the primary transmission shaft, and the two ends of the telescopic shield are respectively connected to the gearbox and the transmission box. A transmission clearance port is arranged on the gantry mechanism, and a folding suspension frame and a telescopic driving member for driving the folding rotation are also arranged, the gearbox of the transmission mechanism is arranged on the gantry mechanism, the gearbox is connected to the primary transmission shaft through a universal coupling, the primary transmission shaft is connected to the secondary transmission shaft through a universal coupling, and the secondary transmission shaft is installed in a transmission box arranged on the folding suspension frame, and the transmission mechanism can also stably transmit power during the unfolding or folding process of the folding suspension frame.

[0005] As an optional solution, a weeding mechanism is provided on the gantry mechanism, and the weeding mechanism includes a weeding frame and a weeding wheel. The weeding frame is connected to the bottom of the gantry mechanism, and the upper traction connection of the three-point suspension mechanism, the power receiving part of the gearbox and the weeding frame are distributed in the same vertical direction. Two weeding wheels are symmetrically provided on the weeding frame, and the outer wheel surfaces of the two weeding wheels are respectively facing the sides where the two folding suspension frames are located and the outer wheel surfaces of the two weeding wheels are inclined downward, and a plurality of weeding teeth are provided on the weeding wheels along the circumference. The weeding mechanism is provided on the gantry mechanism, which can weed the weeds in the blind area between the bodies of the two field returning machines to the bodies when returning the fields, thereby improving the efficiency and effect of returning the fields.

[0006] As an optional solution, the gantry mechanism includes a gantry frame and a bottom support, both ends of the bottom of the gantry frame are connected to the bottom support and the inner end surface of the gantry frame and the upper end surface of the bottom support form a transmission clearance opening, the rear end surface of the gantry frame is provided with a pull plate connecting piece, the rear end surface of the bottom support is provided with a gearbox mounting platform, and the gearbox mounting platform is arranged below the transmission clearance opening.

[0007] As an optional solution, the three-point suspension mechanism includes an upper traction connecting member and a lower traction connecting member. The upper traction connecting member is arranged at the top of the front end surface of the gantry. At least two upper traction connecting holes are arranged on the upper traction connecting member. Lower traction connecting members are arranged at both bottoms of the front end surface of the gantry.

[0008] As an optional solution, the pull plate connecting member includes a pull plate connecting plate, which is arranged on the top of the gantry, the rear end of the pull plate connecting plate extends out of the rear end surface of the gantry and is provided with a pull plate connecting hole; the upper traction connecting member includes an upper traction connecting plate, which is vertically arranged on the front end surface of the gantry and connected to the pull plate connecting plate, at least three upper traction connecting holes are arranged on the upper traction connecting plate, and the upper traction connecting holes are arranged along an arc from top to bottom.

[0009] As an optional solution, the bottom end of the gantry is provided with an installation clearance groove, the bottom support passes through the two installation clearance grooves and is connected to the gantry, and the two end faces of the bottom support are provided with suspension expansion limit end faces.

[0010] As an optional solution, safety hangers are provided on both side end faces of the gantry mechanism, and hanger driving components are provided at positions corresponding to the two safety hangers on the gantry mechanism. The telescopic portion of the hanger driving component is connected to the safety hanger and drives the safety hanger to rotate between the connection protection position and the yield position relative to the gantry mechanism, and a hanger matching component is provided on the folding suspension frame.

[0011] As an optional solution, the telescopic shield includes a first shield body and a second shield body, a guide member is arranged in the second shield body, the first shield body is passed through the second shield body and moves along the guide member relative to the second shield body, and flip connecting members are arranged on the first shield body and the second shield body, and the two flip connecting members are respectively connected to the gearbox and the transmission box.

[0012] As an optional solution, the flip connecting piece includes a first connecting ear, a second connecting ear and a flip pin, the first connecting ear and the second connecting ear are both provided with ear holes, the flip pin passes through the ear holes of the first connecting ear and the second connecting ear and the first connecting ear and the second connecting ear both rotate relative to the flip pin.

[0013] As an optional solution, second reinforcement covers are provided at both ends of the outside of the second cover body, a first reinforcement cover is sleeved on the end of the first cover body outside the second cover body, flip connectors are provided on the first reinforcement cover and the second reinforcement cover away from the first cover body, and a reinforcement edge plate is provided on the outside of the other second reinforcement cover; reinforcement rib plates are provided on the inside of the first cover body and the second cover body.

[0014] Compared with the prior art, the utility model has the following beneficial effects: 1. A gearbox mounting platform is arranged on the gantry mechanism, and the gearbox of the transmission mechanism is mounted on the gearbox mounting platform, and the gearbox mounting platform is connected with the pull plate connecting piece through a pull plate, thereby improving the overall structural strength of the equipment; 2. The secondary transmission shaft of the transmission mechanism is arranged in a transmission box on the folding suspension frame, and both ends of the primary transmission shaft are respectively connected to the power transmission part of the gearbox and the secondary transmission shaft through universal couplings. Due to the two universal couplings, the connection between the primary transmission shaft and the gearbox and the connection with the secondary transmission shaft can be adaptively changed during the unfolding or folding process of the folding suspension frame, and the structure is more reasonable; 3. The secondary transmission shaft is installed in the transmission box and isolated from the outside world, and the primary transmission shaft is covered in a telescopic shield and isolated from the outside world. During the unfolding or folding process of the folding suspension frame, the telescopic shield is telescopic and retracted with the movement, and the primary transmission shaft is always protected inside; 4. The weeding mechanism is arranged in the middle position of the bottom of the gantry mechanism. When folding and returning to the field, the two weeding wheels of the weeding mechanism will push weeds, straw, etc. to the positions of the body of the field returning machine on both sides, thereby improving the field returning effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional structural diagram of the folding frame from the front side perspective;

[0017] Figure 2 It is a three-dimensional structural diagram of the folding frame from the rear side perspective with one telescopic cover omitted;

[0018] Figure 3 It is a schematic diagram of a folding frame in front view;

[0019] Figure 4 It is a connection diagram of the gantry mechanism and the folding suspension frame;

[0020] Figure 5 is a structural diagram of the telescopic shield;

[0021] Figure 6 The structural diagram of a folding field return machine using a folding frame;

[0022] In the figure: 1. gantry mechanism, 11. gantry frame, 12. bottom support, 13. pull plate connecting piece, 14. gearbox mounting table, 15. safety pendant, 16. pendant driving piece, 2. folding suspension frame, 3. telescopic driving piece, 4. transmission mechanism, 41. gearbox, 42. primary transmission shaft, 43. transmission box, 44. telescopic shield, 441. first shield body, 442. second shield body, 443. guide piece, 444. flip connecting piece, 5. three-point suspension mechanism, 51. upper traction connecting piece, 52. lower traction connecting piece, 6. grass-pulling mechanism, 61. grass-pulling frame, 62. grass-pulling wheel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 6 A folding frame of a folding field return machine includes a gantry mechanism 1, a folding suspension frame 2, a telescopic drive member 3 and a transmission mechanism 4. The folding suspension frame 2 and the telescopic drive member 3 are connected to both side end faces of the gantry mechanism 1. The telescopic portion of the telescopic drive member 3 is connected to the folding suspension frame 2. The telescopic drive member 3 drives the folding suspension frame 2 to rotate around the connection with the gantry mechanism 1, thereby realizing the unfolding or folding of the folding frame. The transmission mechanism 4 is installed on the gantry mechanism 1. When the folding frame is applied to the folding field return machine and cooperates with a tractor or other tractor, the power of the tractor is transmitted to the transmission mechanism 4, and the transmission mechanism 4 then distributes the power to the two field return mechanisms of the folding field return machine.

[0025] The gantry mechanism 1 is provided with a transmission clearance opening. The end face of the gantry mechanism 1 used to cooperate with the tractor is its front face, and the end face opposite thereto is its rear face. The transmission clearance opening runs through the front face and the rear face of the gantry mechanism 1. The rear face of the gantry mechanism 1 is provided with a pull plate connector 13 and a gearbox mounting platform 14. The gearbox mounting platform 14 is used to mount the gearbox of the transmission mechanism 4. In some embodiments, the gearbox mounting platform 14 and the pull plate connector 13 can be connected and reinforced by a pull plate. The pull plate is used to ensure that the gearbox mounting platform 14 can be stably mounted on the gantry mechanism 1, and can also play a role in improving the strength of the gantry mechanism 1. As a preferred solution, the gearbox mounting platform 14 is located below the pull plate connector 13, and the upper surface of the gearbox mounting platform 14 is an end face suitable for mounting the gearbox. In order to prevent the pull plate from affecting the gearbox, the pull plate is a bow-shaped pull plate, and the area between the upper surface of the gearbox mounting platform 14 and the bow-shaped pull plate is the gearbox installation area.

[0026] See also Figure 1-Figure 4 The gantry mechanism 1 includes a gantry frame 11 and a bottom support 12. The bottom support 12 is a square steel, square beam or other form of support pipe. Both ends of the bottom of the gantry frame 11 are connected to the bottom support 12. The bottom support 12 and the gantry frame 11 form a stable gantry structure. The area surrounded by the upper end surface of the bottom support 12 and the inner end surface of the gantry frame 11 is a transmission clearance opening. The pull plate connector 13 is arranged on the rear end surface of the gantry frame 11. A gearbox fixing plate is arranged on the bottom support 12. The upper plate surface of the gearbox fixing plate is a gearbox mounting platform. The gearbox mounting platform 14 is arranged below the transmission clearance opening so that the transmission components that cooperate with the gearbox can pass through the transmission clearance opening and cooperate with the tractor. The gearbox fixing plate is at the rear end of the bottom support 12. A reinforcing plate is arranged below the gearbox fixing plate. The reinforcing plate is welded to the support pipe and the gearbox fixing plate of the gantry mechanism.

[0027] See also Figure 1 , Figure 3 and Figure 4 The front end surface of the gantry mechanism 1 is provided with a three-point suspension mechanism 5, and the gantry mechanism 1 is connected and matched with a tractor or other tractor through the three-point suspension mechanism 5. The three-point suspension mechanism 5 includes an upper traction connection member 51 and two lower traction connections 52. The upper traction connection member 51 is arranged at the top position of the front end surface of the gantry frame 11, and the two lower traction connections 52 are respectively arranged at the two bottom positions of the front end surface of the gantry frame 11. The upper traction connection member 51 and the two lower traction connections 52 are distributed in a triangular shape on the front end surface of the gantry frame 11. Both the upper traction connection member 51 and the lower traction connection member 52 can select existing structures suitable for connecting agricultural machinery with tractors.

[0028] As a preferred embodiment, in order to enable the folding field returning machine using the folding frame of this embodiment to be used in conjunction with tractors of various specifications, at least two upper traction connecting holes are provided on the upper traction connecting member 51. When the three-point suspension mechanism 5 is connected to the tractor, the upper traction connecting member 51 is connected to the upper connecting member of the tractor through a connecting pin passing through the upper traction connecting hole. According to the specifications of the tractor, a suitable upper traction connecting hole can be selected.

[0029] See also Figure 1-Figure 4In order to simplify the structure, in some embodiments, the plate connecting member 13 includes a plate connecting plate, which is fixed at the top of the gantry 11, and the rear end of the plate connecting plate extends out of the rear end surface of the gantry 11 and a plate connecting hole is provided on the plate surface of the extended portion, and the plate is connected to the plate connecting member 13 by bolts passing through the plate connecting hole; the upper traction connecting member 51 includes an upper traction connecting plate, which is vertically arranged on the front end surface of the gantry 11 and located at the top of the gantry 11, and the upper traction connecting plate is connected to the rear end of the plate connecting plate, and the upper traction connecting plate and the plate connecting plate form a whole. At least three upper traction connecting holes are provided on the upper traction connecting plate, and the multiple upper traction connecting holes are arranged from top to bottom, which is more conducive to matching the upper traction connecting member 51 with tractors of various specifications.

[0030] Preferably, the pull plate connecting member 13 includes at least two pull plate connecting plates with mutually parallel plate surfaces, the pull plate connecting holes on each pull plate connecting plate are opposite to each other, and the pull plate is connected to the pull plate connecting plate by bolts passing through the plurality of pull plate connecting holes; the upper traction connecting member 51 includes a plurality of upper traction connecting plates with mutually parallel plate surfaces, the rear end of each pull plate connecting plate is connected to the upper traction connecting plate, and the upper traction connecting holes on each upper traction connecting plate are opposite to each other. This design can improve the structural strength of the pull plate connecting plate and the upper traction connecting member 51, and is more convenient to use.

[0031] See also Figure 1 , Figure 3 and Figure 4 As a specific example of the lower traction connection member 52, the lower traction connection member 52 includes a connection seat and a lower traction connection plate, the connection seat is rotatably provided with a pin shaft, the lower traction connection plate is connected to the pin shaft, the lower traction connection plate is provided with a lower traction connection hole, and the lower traction connection plate is connected to a lower connection component of the tractor through a connection pin passing through the lower traction connection hole. Preferably, there are at least two lower traction connection plates, and the plate surfaces of the lower traction connection plates are opposite to each other and the lower traction connection holes are opposite to each other.

[0032] See also Figure 1-Figure 6Suspension connectors are provided at the lower part of the two side end surfaces of the gantry 11. The two suspension connectors are symmetrically distributed relative to the gantry 11. The suspension connectors include mounting pins rotatably connected to the gantry 11. The two folding suspension frames 2 are respectively connected to the gantry 11 through the two suspension connectors and the two folding suspension frames 2 can rotate relative to the gantry 11. Driving connectors are provided above the two side end surfaces of the gantry 11. The two driving connectors are symmetrically distributed relative to the gantry 11. Similar to the structure of the suspension connectors, the driving connectors also include mounting pins rotatably connected to the gantry 11. Two telescopic driving members 3 are respectively installed on the two driving connectors. The telescopic parts of the two telescopic driving members 3 are rotatably connected to the folding suspension frames 2 on the corresponding sides. The telescopic driving members 3 drive the corresponding folding suspension frames 2 to rotate between the folding position and the unfolded position relative to the gantry 11.

[0033] The two folding suspension frames 2 are both provided with a field return machine mounting position. When the folding field return machine is applied, the field return machine mounting positions of the two folding suspension frames 2 are both installed with the body of the field return machine. When the folding frame needs to be unfolded, the two telescopic driving members 3 drive the two folding suspension frames 2 to rotate to the unfolding position. At this time, the axes of the two folding suspension frames 2 are in a state of being collinear or close to being collinear. At this time, if the field return machine mounting position is installed with the body of the field return machine, the body of the two field return machines is in a working state. When the folding frame needs to be folded, the two telescopic driving members 3 drive the two folding suspension frames 2 to rotate to the folding position. At this time, the two folding suspension frames 2 are both rotated to a state where the axis is tilted or the axis is vertical. At this time, if the field return machine mounting position is installed with the body of the field return machine, the body of the two field return machines is in a folding standby state.

[0034] In some embodiments, an installation clearance groove is provided at the bottom end of the gantry 11, and the bottom support 12 is arranged through the two installation clearance grooves and connected to the gantry 11. The two end faces of the bottom support 12 are provided with suspension expansion limit end faces. When the folding suspension frame 2 rotates to the expansion position, the end face of the folding suspension frame 2 adjacent to the gantry mechanism 1 collides with the suspension expansion limit end face. The bottom support 12 serves to limit the expansion angle of the folding suspension frame 2, thereby avoiding excessive expansion of the folding suspension frame 2 due to failure of the telescopic drive member 3, thereby avoiding damage to the folding suspension frame 2 and the body of the field return machine.

[0035] In order to prevent the folding suspension frame 2 from accidentally unfolding out of control when folding, safety hangers 15 are provided on both side end faces of the gantry mechanism 1, and hanger connectors are provided on both side end faces of the gantry 11 above the driving connector. The two hanger connectors are symmetrically distributed relative to the gantry 11. Similar to the driving connector, the hanger connector also includes a mounting pin rotatably connected to the gantry 11. The safety hanger 15 is connected to the hanger connector and rotates relative to the connection with the gantry 11. Hanging drive components 16 are arranged on the end faces of both sides of the gantry 11 and above the hanging connecting components. The hanging drive components 16 are telescopic devices such as oil cylinders and air cylinders. The hanging drive components 16 are rotatably connected to the gantry 11, and the telescopic part thereof is connected to the safety hanging component 15. The hanging drive components 16 drive the safety hanging component 15 to rotate around the hanging connecting component between the connection protection position and the yielding position. A hanging matching component is arranged on the folding suspension frame 2. After the folding suspension frame 2 is rotated to the folding position, the safety hanging component 15 is transferred from the yielding position to the connection protection position and cooperates with the hanging matching component. When the folding suspension frame 2 needs to be rotated to the unfolding position, it is necessary to first transfer the safety hanging component 15 from the connection protection position to the yielding position to disengage the safety firmware from the hanging matching component.

[0036] As a specific example, the safety hanger 15 is provided with a hook, and the hanger matching piece is a hanging shaft. When the safety hanger 15 is matched with the hanger, the hook hooks the hanging shaft.

[0037] As a further embodiment, a hanging plate is provided on the top of the gantry 11, there are two hanging plates and each hanging plate is also connected to each pull plate connecting plate and reinforces the whole formed by the pull plate connecting plate and the upper traction connecting plate, and the hanger fitting is rotatably connected to each hanging plate.

[0038] See also Figure 1-Figure 3 The transmission mechanism 4 includes a gearbox 41, a primary transmission shaft 42, a secondary transmission shaft and a telescopic cover 44. The gearbox 41 is arranged on the gearbox mounting platform 14. The power receiving part of the gearbox 41 corresponds to the transmission clearance port or extends into the transmission clearance port. The opposite end surfaces of the gearbox 41 are provided with power transmission parts. When the folding frame is applied to the folding farmland machine and used in conjunction with a tractor or other tractor, the power of the tractor is transmitted to the gearbox through the transmission parts passing through the transmission clearance port. After the power receiving part receives the power, the gearbox outputs the power from the two power transmission parts. Both power transmission parts are connected to the primary transmission shaft 42 through a universal coupling, and each primary transmission shaft 42 is also connected to a secondary transmission shaft through a universal coupling.

[0039] The two folding suspension frames 2 are connected with a transmission box 43, and the two transmission boxes 43 are rotatably installed with a secondary transmission shaft. Both ends of the secondary transmission shaft extend out of the transmission box 43, and one end of the secondary transmission shaft close to the gearbox is connected by a universal coupling, and the other end is provided with a power output part. Since the primary transmission shaft 42 is connected to the gearbox and the secondary transmission shaft by a universal coupling, when the folding suspension frame 2 rotates between the folding position and the unfolding position, the primary transmission shaft 42 is adaptively changed relative to the transmission connection with the gearbox and the connection between the primary transmission shaft 42 and the secondary transmission shaft, which does not affect the power transmission of the transmission mechanism 4, and the power output part of the secondary transmission shaft does not change position, which does not affect the power transmission between the transmission mechanism 4 and the body of the field return machine, and can ensure that the folding frame and the body of the field return machine are always in a state of power transmission.

[0040] The telescopic shield 44 is arranged on the outside of the primary transmission shaft 42, one end of the telescopic shield 44 is connected to the gearbox and can rotate relative to the connection with the gearbox, the other end of the telescopic shield 44 is connected to the transmission box 43 and can rotate relative to the connection with the transmission box 43, the telescopic shield 44 can be extended or shortened in the length direction, and during the rotation of the folding suspension frame 2 between the folding position and the unfolded position, the telescopic shield 44 always sets the primary transmission shaft cover inside and extends or shortens with the rotation of the folding suspension frame 2.

[0041] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 The telescopic shield 44 includes a first shield body 441 and a second shield body 442. Both the first shield body 441 and the second shield body 442 are U-shaped shield structures with an open bottom. A first protective space is provided in the first shield body 441 and the first protective space passes through its two opposite ends. A second protective space is provided in the second shield body 442 and a guide member 443 is provided. The second protective space passes through the two opposite ends of the second shield body 442 along the length direction of the guide member 443. One end of the first shield body 441 penetrates into the second protective space. The first shield body 441 cooperates with the guide member 443 and moves along the guide member 443. The first protective space and the second protective space form a transmission shaft protective space. When the first shield body 441 moves along the guide member 443 into the second shield body 442, the telescopic shield 44 is shortened as a whole. When the first shield body 441 moves along the guide member 443 out of the second shield body 442, the telescopic shield 44 is extended as a whole.

[0042] In some embodiments, the lower edge of the second cover body 442 is bent into the second receiving groove to form a guide groove, the guide member 443 includes two guide grooves, the first cover body 441 extends into the second cover body 442 and the lower edges of both sides of the first cover body 441 are respectively located in the two guide grooves, and the first cover body 441 moves along the guide grooves. Further, the lower edge of the first cover body 441 is bent into the first receiving groove to form a reinforcing edge to prevent the lower edge of the first cover body 441 from being deformed.

[0043] The first cover body 441 and the second cover body 442 are both provided with a flip connector 444, and the two flip connectors 444 are respectively connected to the gearbox and the transmission box 43. As a specific example of the flip connector 444, the flip connector 444 includes a first connecting ear, a second connecting ear and a flip pin, and the first connecting ear and the second connecting ear are both provided with ear holes, and the flip pin passes through the ear holes of the first connecting ear and the second connecting ear, and the first connecting ear and the second connecting ear are both rotated relative to the flip pin.

[0044] See also Figure 5 In some embodiments, a second reinforcement cover is provided at both ends of the outside of the second cover body 442. The second reinforcement cover is a U-shaped cover structure with the same shape as the second cover body 442 and a shorter length. The second reinforcement cover is buckled on the outside of the second cover body 442 and connected to the second cover body 442. The second reinforcement cover is at both ends of the second cover body 442 and reinforces the second cover body 442 at both ends; a first reinforcement cover is sleeved on the end of the first cover body 441 located outside the second cover body 442. The first reinforcement cover has the same shape as the first cover body 441 and a shorter length. The first reinforcement cover is buckled at the end of the first cover body 441 located outside the second cover body 442 and connected to the first cover body 441. The flip connector 444 on the first cover body 441 is arranged on the first reinforcement cover, and the flip connector 444 on the second cover body 442 is arranged on the second reinforcement cover away from the first cover body 441. The outside of the second reinforcement cover is provided with a reinforcing ridge to further strengthen the strength of the second reinforcement cover and prevent the second reinforcement cover from deformation; reinforcing ribs are arranged inside the first cover body 441 and the second cover body 442 to further prevent the first cover body 441 and the second cover body 442 from deformation.

[0045] In the folding machine, since the two parts of the machine body can be folded, in order to reserve enough moving clearance, there will be a processing blind area in the middle of the folding machine. When returning the field, the two parts of the machine body cannot process the processing blind area. In order to improve the returning effect and efficiency of the folding machine, please refer to Figure 1-Figure 3In some embodiments, a weeding mechanism 6 is also provided on the gantry mechanism 1. The weeding mechanism 6 includes a weeding frame 61 and a weeding wheel 62. The weeding frame 61 is connected to the bottom of the gantry mechanism 1. The upper traction connection 51 of the three-point suspension mechanism 5, the power receiving part of the gearbox and the weeding frame 61 are distributed in the same vertical direction. Two weeding wheels 62 are symmetrically provided on the weeding frame 61. Relative to the position of the weeding frame 61, the two weeding wheels 62 are respectively on the side where the two folding suspension frames 2 are located. The outer wheel surfaces of the two weeding wheels 62 are respectively facing the side where the two folding suspension frames 2 are located. The outer wheel surfaces of the two weeding wheels 62 are tilted downward, so that the straw, stubble, etc. gathered in the gap between the working areas of the two machines can be distributed to the working area of ​​the field return machine. The weeding wheel 62 is provided with a plurality of weeding teeth along the circumference. The weeding wheel 62 is rotatably mounted on the weeding frame 61 through a bearing. When returning the field, the weeding teeth can rotate when they contact weeds and straw.

[0046] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", 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 utility model. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A folding frame of a folding farmland returning machine, characterized in that: The invention comprises a gantry mechanism (1), a folding suspension frame (2), a telescopic driving member (3) and a transmission mechanism (4); the gantry mechanism (1) is provided with a transmission opening; the rear end face of the gantry mechanism (1) is provided with a pull plate connecting member (13) and a gearbox mounting platform (14); the front end face of the gantry mechanism (1) is provided with a three-point suspension mechanism (5); the two side end faces of the gantry mechanism (1) are connected to the folding suspension frame (2); a field return machine mounting position is provided on the folding suspension frame (2); and the folding suspension frame (2) is connected to a transmission box (43); the two side end faces of the gantry mechanism (1) are provided with telescopic driving members (3); the telescopic parts of the two telescopic driving members (3) are respectively connected to the two folding suspension frames (2); and the two telescopic driving members (3) respectively drive the two folding suspension frames (2) to rotate between a folding position and an unfolded position; the transmission The driving mechanism (4) comprises a gearbox (41), a primary transmission shaft (42), a secondary transmission shaft and a telescopic shield (44). The gearbox (41) is arranged on a gearbox mounting platform (14). The power receiving part of the gearbox (41) extends into the transmission yielding port. Power transmission parts are arranged on opposite end surfaces of the gearbox (41). Each power transmission part is connected to the primary transmission shaft (42) via a universal coupling. A secondary transmission shaft is arranged in each transmission box (43). One end of the secondary transmission shaft is connected to the corresponding primary transmission shaft (42) via a universal coupling. The other end extends out of the transmission box (43) and is provided with a power output part. The telescopic shield (44) is arranged outside the primary transmission shaft (42). The two ends of the telescopic shield (44) are respectively connected to the gearbox (41) and the transmission box (43) in a flipping manner.

2. The folding frame of the folding farmland returning machine according to claim 1, characterized in that: A grass-pulling mechanism (6) is provided on the gantry mechanism (1), and the grass-pulling mechanism (6) comprises a grass-pulling frame (61) and a grass-pulling wheel (62). The grass-pulling frame (61) is connected to the bottom of the gantry mechanism (1), and the upper traction connecting member (51) of the three-point suspension mechanism (5), the power receiving part of the gearbox (41) and the grass-pulling frame (61) are distributed along the same vertical direction. Two grass-pulling wheels (62) are symmetrically provided on the grass-pulling frame (61), and the outer wheel surfaces of the two grass-pulling wheels (62) are respectively oriented toward the sides where the two folding suspension frames (2) are located and the outer wheel surfaces of the two grass-pulling wheels (62) are inclined downwards. A plurality of grass-pulling teeth are provided on the grass-pulling wheels (62) along the circumference.

3. The folding frame of the folding farmland returning machine according to claim 2, characterized in that: The gantry mechanism (1) comprises a gantry frame (11) and a bottom support (12), both ends of the bottom of the gantry frame (11) are connected to the bottom support (12), and the inner end surface of the gantry frame (11) and the upper end surface of the bottom support (12) form a transmission clearance opening, the rear end surface of the gantry frame (11) is provided with a pull plate connecting piece (13), and the rear end surface of the bottom support (12) is provided with a gearbox mounting platform (14), and the gearbox mounting platform (14) is arranged below the transmission clearance opening.

4. The folding frame of the folding farmland returning machine according to claim 3, characterized in that: The three-point suspension mechanism (5) comprises an upper traction connection member (51) and a lower traction connection member (52); the upper traction connection member (51) is arranged at the top of the front end surface of the gantry (11); at least two upper traction connection holes are arranged on the upper traction connection member (51); and the lower traction connection members (52) are arranged at both bottoms of the front end surface of the gantry (11).

5. The folding frame of the folding farmland returning machine according to claim 4, characterized in that: The pull plate connecting member (13) comprises a pull plate connecting plate, the pull plate connecting plate being arranged on the top of the gantry (11), the rear end of the pull plate connecting plate extending out of the rear end surface of the gantry (11) and being provided with a pull plate connecting hole; the upper traction connecting member (51) comprises an upper traction connecting plate, the upper traction connecting plate being arranged vertically on the front end surface of the gantry (11) and connected to the pull plate connecting plate, at least three upper traction connecting holes being arranged on the upper traction connecting plate, and the upper traction connecting holes being arranged along an arc from top to bottom.

6. The folding frame of the folding farmland returning machine according to claim 3, characterized in that: The bottom end of the gantry (11) is provided with an installation clearance groove, the bottom support (12) passes through the two installation clearance grooves and is connected to the gantry (11), and the two end surfaces of the bottom support (12) are provided with suspension expansion limit end surfaces.

7. The folding frame of the folding farmland returning machine according to claim 2, characterized in that: Safety hangers (15) are arranged on both side end surfaces of the gantry mechanism (1), and hanger driving components (16) are arranged on the gantry mechanism (1) at positions corresponding to the two safety hangers (15). The telescopic portion of the hanger driving component (16) is connected to the safety hangers (15) and drives the safety hangers (15) to rotate between a connection protection position and a pass position relative to the gantry mechanism (1), and a hanger matching component is arranged on the folding suspension frame (2).

8. The folding frame of the folding farmland returning machine according to claim 2, characterized in that: The telescopic shield (44) comprises a first shield body (441) and a second shield body (442); a guide member (443) is arranged in the second shield body (442); the first shield body (441) is inserted into the second shield body (442) and moves relative to the second shield body (442) along the guide member (443); a flip connection member (444) is arranged on the first shield body (441) and the second shield body (442); the two flip connection members (444) are respectively connected to the gearbox (41) and the transmission box (43).

9. The folding frame of the folding farmland returning machine according to claim 8, characterized in that: The flip connection piece (444) comprises a first connection ear, a second connection ear and a flip pin, the first connection ear and the second connection ear are both provided with ear holes, the flip pin passes through the ear holes of the first connection ear and the second connection ear, and the first connection ear and the second connection ear are both rotated relative to the flip pin.

10. The folding frame of the folding farmland returning machine according to claim 8, characterized in that: Second reinforcement covers are provided at both ends of the exterior of the second cover body (442); a first reinforcement cover is sleeved at the end of the first cover body (441) located outside the second cover body (442); a flip connector (444) is provided on the first reinforcement cover and a second reinforcement cover away from the first cover body (441); a reinforcement ridge is provided on the exterior of the other second reinforcement cover; and reinforcement ribs are provided on the interior of the first cover body (441) and the second cover body (442).

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