Folding rotary cultivator and folding mechanism and connector thereof

Abstract

The invention discloses a folding type rotary cultivator and a folding mechanism and a connector thereof. The folding type rotary cultivator comprises a cross beam; the main reduction gearbox is fixedly installed on the cross beam, and the power input end of the main reduction gearbox is connected with a power output shaft of a tractor engine; the two first rotary tillage cutter shafts are located on the two sides of the main reduction gearbox respectively and connected with the power output end of the main reduction gearbox at the same time; the two suspension beams are arranged at the two ends of the cross beam respectively; the two auxiliary reduction gearboxes are fixedly mounted on the two suspension beams in a one-to-one correspondence manner; the two transmission mechanisms and the two auxiliary reduction gearboxes are arranged in a one-to-one correspondence manner; one end of the transmission mechanism is connected with the power input end of the main reduction gearbox, and the other end is selectively connected with the input end of the corresponding auxiliary reduction gearbox; the two second rotary tillage cutter shafts are arranged below the two suspension beams respectively, and the second rotary tillage cutter shafts are connected with the power output ends of the auxiliary reduction gearboxes in a one-to-one correspondence mode; and the two folding mechanisms are arranged in one-to-one correspondence with the two suspension beams and are used for connecting the corresponding suspension beams and the cross beams.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical devices for tilling land, and in particular relates to a foldable rotary tiller and a folding mechanism and a connector thereof. Background Art

[0002] The rotary tillers on the market currently mainly use through-shaft or intermediate gearboxes to drive the left and right half-shafts to rotate to achieve the rotary tillage function, which has the characteristics of small operating area and low operating efficiency. At the same time, the rotary tillers based on through-shaft or intermediate gearbox drive are not very versatile and cannot effectively increase the single operating area. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a foldable rotary tiller, which adds a rotary tiller shaft on each side of the rotary tiller, and the added rotary tiller shaft can be folded, which can greatly improve the single operating area of ​​the tiller and meet the road transportation size requirements. At the same time, the quality of the rotary tillage operation can be improved by reasonably setting the driving mechanism of the rotary tiller shaft.

[0004] The present invention also provides a connector, which can ensure the connection stability between the transmission mechanism and the main reduction box, ensure the power transmission effect, and is easy to fold.

[0005] The present invention also provides a folding mechanism, which has a simple structure, occupies a small space, and can maintain the stability of the rotary tiller shaft in the unfolded state and the folded state.

[0006] The technical solution provided by the present invention is:

[0007] A foldable rotary tiller, comprising:

[0008] beam;

[0009] A main reduction gearbox, which is fixedly mounted on the crossbeam, a power input end of the main reduction gearbox is connected to a power output shaft of the tractor engine, and a power output end of the main reduction gearbox is located below the crossbeam;

[0010] Two first rotary tiller shafts are arranged below the cross beam along the length direction of the cross beam and are respectively located on both sides of the main reduction gearbox and are connected to the power output end of the main reduction gearbox;

[0011] Two suspension beams, which are respectively arranged at two ends of the cross beam;

[0012] Two auxiliary reduction gearboxes, which are fixedly mounted on the two suspension beams in a one-to-one correspondence;

[0013] Two transmission mechanisms are arranged one by one with the two auxiliary reduction boxes; one end of the transmission mechanism is connected to the power input end of the main reduction box, and the other end is selectively connected to the input end of the corresponding auxiliary reduction box;

[0014] Wherein, the power output end of the auxiliary reduction box is located below the suspension beam;

[0015] Two second rotary tiller shafts are arranged under the two suspension beams in a one-to-one correspondence, and the two second rotary tiller shafts are connected to the power output ends of the two auxiliary reduction boxes in a one-to-one correspondence;

[0016] Two folding mechanisms, which are arranged one by one corresponding to the two suspension beams and are used to connect the corresponding suspension beams and the cross beam;

[0017] Among them, when the rotary tiller is in a working state, the folding mechanism is unfolded, the transmission mechanism is connected to the input end of the auxiliary reduction box, and the first rotary tiller shaft and the second rotary tiller shaft rotate synchronously; when the rotary tiller is in a non-working state, the folding mechanism is folded, the transmission mechanism is disconnected from the input end of the auxiliary reduction box, and the suspension beam together with the second rotary tiller shaft and the auxiliary reduction box flip over the crossbeam.

[0018] Preferably, the transmission mechanism comprises:

[0019] A transmission shaft, one end of which is connected to the power input end of the main reduction gearbox;

[0020] A support plate, which is fixedly arranged on the top of the crossbeam;

[0021] A connecting shaft passes through the support plate through a bearing support, one end of the connecting shaft is connected to the other end of the transmission shaft, and the other end is selectively connected to the input end of the auxiliary reduction box.

[0022] Preferably, the main reduction gearbox comprises:

[0023] A main transmission shaft, one end of which is connected to the tractor's engine power output shaft and the other end of which is provided with a driving bevel gear;

[0024] A transverse axis is arranged along the length direction of the crossbeam, and both ends of the transverse axis are rotatably supported on the main reduction gearbox housing;

[0025] Wherein, the main transmission shaft is perpendicular to the horizontal axis;

[0026] A driven bevel gear, which is coaxially fixedly mounted on the transverse shaft and meshes with the driving bevel gear;

[0027] A first cylindrical gear, which is coaxially fixedly mounted on the transverse shaft;

[0028] a second cylindrical gear meshing with the first cylindrical gear;

[0029] a third cylindrical gear meshing with the second cylindrical gear;

[0030] Wherein, the third cylindrical gear is connected to the two first rotary tiller shafts at the same time, and the transmission shaft is connected to the transverse shaft.

[0031] Preferably, the transmission shaft and the transverse shaft as well as the connecting shaft and the transmission shaft are connected via a cross structure respectively.

[0032] Preferably, cover plates are respectively provided on the tops of the cross beam and the suspension beam, and tail plates are respectively provided on the rear sides of the cross beam and the suspension beam.

[0033] Preferably, the front sides of the cross beam and the suspension beam are both provided with limiting wheels; the limiting wheels are connected to their corresponding cross beams or suspension beams via adjustment brackets, and the height of the limiting wheels from the ground can be adjusted by changing the connection position of the adjustment bracket and the cross beam.

[0034] Preferably, the tail plate and the cross beam, and the tail plate and the suspension beam are respectively connected via a plurality of lifting rods, and the elevating rods can be extended or shortened to adjust the inclination angle of the tail plate.

[0035] A connector, used for the foldable rotary tiller, through which the selective connection between the connecting shaft and the input end of the auxiliary reduction box is realized, the connector comprises:

[0036] A first connecting disk, which is in the shape of a disk and is coaxially fixedly connected to the connecting shaft;

[0037] A plurality of mushroom nails are arranged on the first connecting disk in an array along the circumference of the first connecting disk;

[0038] Wherein, the tip of the mushroom nail is arranged toward an end away from the connecting shaft;

[0039] The second connection disk is in the shape of a disk and is coaxially arranged with the first connection disk; a plurality of cylindrical holes are formed on the second connection disk, and the cylindrical holes are arranged one by one corresponding to the mushroom nails; when the first connection disk is engaged with the second connection disk, the mushroom nails are inserted into the corresponding cylindrical holes;

[0040] Wherein, the second connecting disk is connected to the input end of the auxiliary reduction box connecting mechanism.

[0041] Preferably, a rubber ring is sleeved on the mushroom nail, and the mushroom nail contacts the hole wall of the cylindrical hole through the rubber ring.

[0042] A folding mechanism, used for the folding rotary tiller, comprising:

[0043] A pair of first support frames, the bottoms of which are respectively fixedly arranged on the front side and the rear side of the crossbeam;

[0044] A pair of second support frames, the bottoms of which are respectively fixedly arranged on the front side and the rear side of the suspension beam;

[0045] A sleeve, one end of which is rotatably supported simultaneously on the top of the first support frame at the rear side of the cross beam and the top of the second support frame at the rear side of the suspension beam, and the other end of which is rotatably supported simultaneously on the top of the first support frame at the front side of the cross beam and the top of the second support frame at the front side of the suspension beam;

[0046] A support shaft rotatably passes through the sleeve, and both ends of the support shaft extend to the outside of the sleeve respectively;

[0047] A connecting rod, one end of which is rotatably sleeved on the supporting shaft;

[0048] A connecting rod pin shaft, which rotatably passes through the other end of the connecting rod, and the connecting rod pin shaft is arranged parallel to the supporting shaft;

[0049] A first hydraulic cylinder, whose cylinder barrel is hinged to the crossbeam; a piston rod is hinged to the connecting rod pin and can rotate around the connecting rod pin;

[0050] The second hydraulic cylinder has a cylinder barrel hinged to the suspension beam; a piston rod hinged to the connecting rod pin and capable of rotating around the connecting rod pin.

[0051] The beneficial effects of the present invention are:

[0052] The foldable rotary tiller provided by the present invention has a rotary tiller shaft added to each side of the rotary tiller, and the added rotary tiller shaft is foldable, which can greatly improve the single operating area of ​​the tiller and meet the road transportation size requirements. At the same time, the quality of the rotary tillage operation can be improved by reasonably setting the driving mechanism of the rotary tiller shaft.

[0053] The connector provided by the present invention can ensure the connection stability between the transmission mechanism and the main reduction box, ensure the power transmission effect, and is easy to fold.

[0054] The folding mechanism provided by the present invention has a simple structure, occupies a small space, and can maintain the stability of the rotary tiller blade shaft in the unfolded state and the folded state. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the overall structure of the foldable rotary tiller described in the present invention.

[0056] Figure 2 It is a schematic diagram of the main and auxiliary reduction gearboxes and the transmission mechanism of the present invention.

[0057] Figure 3 Schematic diagram of the transmission mechanism of the present invention.

[0058] Figure 4 This is a parameter diagram of the main reduction gearbox gear transmission structure of the present invention.

[0059] Figure 5 This is a transmission structure diagram of the main reduction gearbox and the first rotary tiller shaft described in the present invention.

[0060] Figure 6 This is a schematic diagram of the structure of the first (second) rotary tiller shaft described in the present invention.

[0061] Figure 7 This is a structural diagram of the connector described in the present invention.

[0062] Figure 8 This is a schematic diagram of the expanded structure of the connector described in the present invention.

[0063] Fig. 9 It is a structural schematic diagram of the folding mechanism of the rotary tiller described in the present invention.

[0064] Fig.10 It is a schematic structural diagram of the connecting rod described in the present invention.

[0065] Fig.11 It is a connection schematic diagram of the folding mechanism described in the present invention.

[0066] Fig.12 The present invention is a schematic diagram of the folding rotary tiller in the folded state.

[0067] Fig.13 It is a schematic diagram of the limiting wheel, cover plate and tail plate of the foldable rotary tiller described in the present invention. DETAILED DESCRIPTION

[0068] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0069] like Figure 1-6 As shown, the present invention provides a foldable rotary tiller, which mainly includes: a suspension lifting system 101, a main transmission shaft 102, a driving bevel gear 103, a driven bevel gear 103a, a main reduction box 104, a rotary tiller beam 105, two suspension beams 105a, two auxiliary reduction boxes 106, two transmission shafts 107, two first rotary tiller blade shafts 108, two second rotary tiller blade shafts 109 and two folding mechanisms 110.

[0070] The foldable rotary tiller is supported at the rear of the tractor through a suspension lifting system 101, and can automatically adjust the lifting height from the ground according to the driving or rotary tilling requirements. The engine output power is connected to the main transmission shaft 102 through a cross-shaped fork structure via the gearbox output shaft, thereby ensuring the space power input requirements of the rotary tiller.

[0071] The crossbeam 105 is a frame structure, which is arranged horizontally. The main reduction box 104 is fixedly supported in the middle position of the crossbeam 105 by a bolt structure, and the left and right sides of the crossbeam 105 are arranged in a symmetrical structure. The driving bevel gear 103 is installed at the tail end of the main transmission shaft 102, and the driven bevel gear 103a is fixed on the horizontal axis 1041 in the main reduction box 104. The horizontal axis 1041 is arranged along the length direction (transverse direction) of the crossbeam 105, and the two ends of the horizontal axis 1041 are supported on the upper part of the shell of the main reduction box 104 through the bearing structure. The main transmission shaft 102 drives the driven bevel gear 103a in the main reduction box 104 to rotate through the driving bevel gear 103 installed at the tail end. The driving and driven bevel gear structure can not only reduce speed and increase torque, but also change the power transmission direction by 90 degrees. The first cylindrical gear 1042 is fixed on the horizontal shaft 1041, and the first cylindrical gear 1042 is externally meshed with the second cylindrical gear 1043 for transmission. The second cylindrical gear 1043 is assembled on the pin shaft 1043a through a bearing structure. The two ends of the pin shaft 1043a are fixed at the middle position on both sides of the shell of the main reduction box 104. The second cylindrical gear 1043 is externally meshed with the third cylindrical gear 1044 for transmission.

[0072] like Figure 4 As shown, as a preferred embodiment, the tooth top circle diameter of the first cylindrical gear 1042 is 176mm, the pitch circle diameter is 154mm, and the tooth root circle diameter is 132mm; the center distance between the first cylindrical gear 1042 and the second cylindrical gear 1043 is 231mm, and the center distance between the second cylindrical gear 1043 and the third cylindrical gear 1044 is 264mm; the tooth top circle diameter of the third cylindrical gear 1044 is 242mm, the pitch circle diameter is 220mm, and the tooth root circle diameter is 190mm; the spacing between two adjacent sets of rotary tillage blades is 134.25mm. It has been verified by experiments that the design of the above gear parameters can ensure the optimal transmission efficiency and reliability of the gear transmission in the main reduction box 104.

[0073] The third cylindrical gear 1044 is connected to the spline shaft at the left end of the first rotary tiller shaft 108 on the right side and the spline shaft at the right end of the first rotary tiller shaft 108 on the left side by setting an inner spline structure, and the two first rotary tiller shafts 108 rotate synchronously. The inner side of the spline shaft at the left end of the first rotary tiller shaft 108 on the right side and the inner side of the spline shaft at the right end of the first rotary tiller shaft 108 on the left side are supported at the lower end of the housing of the main reduction box 104 by setting a bearing structure, and the spline shaft and the support bearing at the shaft end of the first rotary tiller shaft 108 are sealed by setting a rubber sealing cover 108b to ensure its working reliability and service life. The other ends of the two first rotary tiller shafts 108 are supported on two first shaft brackets 108a by setting a bearing structure; wherein, the two first shaft brackets 108a are respectively fixed to the two ends of the crossbeam 105 by bolts.

[0074] When the active bevel gear 103 drives the driven bevel gear 103a to rotate, the coaxial first cylindrical gear 1042 is driven to rotate, and then the second cylindrical gear 1043 and the third cylindrical gear 1044 are driven to finally drive the two first rotary blade shafts 108 to rotate synchronously.

[0075] like Figure 1-3 As shown, two suspension beams 105a are respectively arranged at the two ends of the cross beam 105, and two auxiliary reduction gearboxes 106 are respectively fixed and supported on the inner ends of the two suspension beams 105a (one end close to the cross beam 105) through bolt structures.

[0076] The two ends of the transverse shaft 1041 in the main reduction gearbox 104 are connected to the inner ends of the two transmission shafts 107 through a cross fork 1071 structure. Figure 3 As shown, the outer end of the transmission shaft 107 is connected to the connecting shaft 202, and the connecting shaft 202 passes through the support plate 201 through the bearing support 203. The support plate 201 is longitudinally fixed on the crossbeam 105 of the rotary tiller, which ensures the stable support of the transmission shaft 107 and the connecting shaft 202 during the power transmission process. The transmission shaft 107, the support plate 201, the connecting shaft 202 and the bearing support 203 together constitute a transmission mechanism. The outer end of the connecting shaft 202 is a connector 204, and the outer end of the connector 204 is connected to the spline shaft 205. The two ends of the spline shaft 205 are supported by the upper end of the auxiliary reduction box 106 through the bearing structure. The first cylindrical gear 1061 of the auxiliary reduction box is fixed on the spline shaft 205 and is externally meshed with the second cylindrical gear 1062 of the auxiliary reduction box. The second cylindrical gear 1062 of the auxiliary reduction box is assembled on the pin shaft 1062a by setting a bearing structure. The two ends of the pin shaft 1062a are fixed at the middle position on both sides of the auxiliary reduction box 106. The second cylindrical gear 1062 of the auxiliary reduction box is externally meshed with the third cylindrical gear 1063 of the auxiliary reduction box.

[0077] The third cylindrical gear 1063 of the auxiliary reduction box is connected to the spline shaft at the inner end of the second rotary tiller shaft 109 by setting an internal spline structure, driving the second rotary tiller shaft 109 to rotate. The outer end of the second rotary tiller shaft 109 is supported on the second shaft bracket 109a by setting a bearing structure, and the second shaft bracket 109a is fixed to the outer end of the suspension beam 105a by bolts.

[0078] When the active bevel gear 103 drives the driven bevel gear 103a to rotate, the horizontal shaft 1041 is driven to rotate, and the power drives the first cylindrical gear 1061 of the auxiliary reduction box 106 to rotate through the cross fork 1071, the transmission shaft 107, the connecting shaft 202, the connector 204, and the spline shaft 205, and then drives the second cylindrical gear 1062 and the third cylindrical gear 1063 of the auxiliary reduction box to finally drive the second rotary tiller shaft 109 to rotate. The rotary tiller shaft structure is as follows Figure 6 shown.

[0079] Since the rotary tiller is arranged in a symmetrical structure on the left and right, the power is transmitted to the lower gear path in the auxiliary reduction box 106 through the two transmission shafts 107 in a consistent manner, and finally drives the two second rotary tiller shafts 109 to rotate synchronously.

[0080] The rotary tiller adopts a dual-axis transmission solution, which can improve the power and stability of the two second rotary tiller shafts 109 located outside the beam 105 when rotary tilling the land, avoiding problems such as insufficient power and poor balance at the end of the rotary tiller shaft when single-axis power transmission occurs.

[0081] Two folding mechanisms 110 are arranged in one-to-one correspondence with the two suspension beams 105a, and are used to connect the corresponding suspension beams 105a and the cross beam 105. When the rotary tiller is in working state, the two folding mechanisms 110 are unfolded, and the connector 204 is connected, so that the transmission mechanism is connected to the input end of the auxiliary reduction box 106, and the two first rotary tiller blade shafts 108 and the two second rotary tiller blade shafts 109 rotate synchronously; when the rotary tiller is in non-working state, the folding mechanism 110 is folded, the transmission mechanism is disconnected from the input end of the auxiliary reduction box 106, and the two suspension beams 105a together with the second rotary tiller blade shafts 109 and the auxiliary reduction box 106 are flipped to the top of the cross beam 105. By setting the folding mechanism 110, the dimensional parameter requirements of the rotary tiller suspension during normal road driving can be met.

[0082] In one embodiment, the connector 204 is structured as follows Figure 7 and 8As shown. The connector 204 is connected by a first connection disk 2041 and a second connection disk 2042 through a plurality of mushroom nails 206 (uniformly arranged on the disk in a circumference) fixed on the circumference of the first connection disk 2041. The first connection disk 2041 is fixedly connected to the end (right end) of the connecting shaft 202, and the inner end (close to one end of the connecting shaft 202) of the first connection disk 2041 is supported by a bearing support 203 fixed in the support plate 201, and a cylindrical bearing is arranged in the bearing support 203 to ensure the stability of the first connection disk 2041 during rotation connection. The mushroom nail 206 is limited in its assembly position by an assembly nut on the inner end face (the end face facing the connecting shaft 202) of the first connection disk 2041. The second connection disk 2042 of the connector 204 is fixedly connected to the left end of the spline shaft 205, and the two ends of the spline shaft 205 are supported by the bearing structure through the upper end of the auxiliary reduction box 106. The second connection disk 2042 is provided with a cylindrical hole (through hole) corresponding to the mushroom nail 206. The tip of the mushroom nail 206 is arranged toward the cylindrical hole, and the inner end surface of the cylindrical hole (close to the first connection disk 2041 side) is provided with a circular chamfer, so as to facilitate the matching connection of each mushroom nail 206 with its corresponding cylindrical hole. A rubber ring 2061 is provided at the joint of the mushroom nail 206 and the second connection disk 2042 to alleviate the impact when the first connection disk 2041 and the second connection disk 2042 are connected, so as to ensure their smooth connection. When the connector 204 is in a connected state, the mushroom nail 206 ensures the reliability of the first connection disk 2041 and the second connection disk 2042, so that the second connection disk 2042 rotates synchronously with the first connection disk 2041, and the inner spline provided in the center hole of the second connection disk 2042 drives the spline shaft 205 to rotate synchronously. When the second connection disk 2042 of the connector 204 is folded upward with the spline shaft 205, it can automatically separate from the mushroom nail 206.

[0083] The connector 204 adopts a double-disc connection method, which can effectively improve the stable connection between the transmission mechanism and the auxiliary gear box, ensure the power transmission effect, and facilitate disconnection when folding.

[0084] In another embodiment, the folding structure of the rotary tiller is as follows: Fig. 9 and 10As shown, a sleeve 112 is provided outside the support shaft 111, and the sleeve 112 can rotate around the support shaft 111. The two ends of the sleeve 112 are supported by a pair of first support frames 113 fixed on the front and rear sides of the cross beam 105 and a pair of second support frames 114 fixed on the front and rear sides of the suspension beam 105a through bearings, respectively, and the two pairs of first support frames 113 and second support frames 114 can rotate around the sleeve 112. The two ends of the support shaft 111 extend a certain length relative to the sleeve 112, and the front end (close to the tractor end) is used to install the connecting rod 115, and the sleeve 115a at the lower end of the connecting rod 115 is assembled on the front end of the support shaft 111 through a needle bearing and can swing freely around it. The sleeve 115b at the upper end of the connecting rod 115 is assembled on the connecting rod pin 116 through a needle bearing and can swing freely around it. At the same time, the first piston rod 117a of the first hydraulic cylinder 117 and the second piston rod 118a of the second hydraulic cylinder 118 assembled on the connecting rod pin 116 are arranged at intervals. The upper ends of the first piston rod 117a and the second piston rod 118a are hinged on the connecting rod pin 116 through a circular support ring and can swing freely around it. The lower ends of the first hydraulic cylinder 117 and the second hydraulic cylinder 118 are respectively hinged on the front side of the crossbeam 105 and the suspension beam 105a through a support pin and a support seat structure and can swing around the support pin.

[0085] When the tractor is driving on the road, the suspension beams 105a at both ends of the rotary tiller are folded by the folding structure 110. The oil storage tank in the hydraulic system is connected to the first upper oil port 1171 and the first lower oil port 1172 of the first hydraulic cylinder 117 and the second upper oil port 1181 and the second lower oil port 1182 of the second hydraulic cylinder 118 through oil pipes. Fig.11 As shown, when the hydraulic system is started to realize the folding of the rotary tiller, the hydraulic oil in the oil storage tank flows into the first upper oil port 1171 of the first hydraulic cylinder 117 and the second upper oil port 1181 of the second hydraulic cylinder 118 through the oil pipe. As the oil flows into the first hydraulic cylinder 117 and the second hydraulic cylinder 118, the upper chamber oil pressure increases continuously, which drives the first piston rod 117a and the second piston rod 118a to be compressed into the hydraulic cylinder. At the same time, the lower chamber oil in the first hydraulic cylinder 117 and the second hydraulic cylinder 118 flows back to the oil storage tank through the first lower oil port 1172 and the second lower oil port 1182 through the oil pipe respectively. Under the action of the pressure difference in the upper and lower chambers of the hydraulic cylinder, the piston rod is compressed relative to the hydraulic cylinder, and the cantilever beams 105a at both ends rotate upward around the support shaft 111 by a certain angle together with the connecting rod 115 as the compression changes of the first hydraulic cylinder 117 relative to the first piston rod 117a and the second hydraulic cylinder 118 relative to the second piston rod 118a. The structural parameters of the first hydraulic cylinder 117 and the second hydraulic cylinder 118 and the first piston rod 117a and the second piston rod 118a match to ensure that the suspension beam 105a can be folded upward by 180 degrees until the second knife shaft bracket 109a at the outer end of the suspension beam 105a falls on the bracket assembly 101a at the top of the suspension lifting system 101. Fig.12During this process, the first connection disk 2041 and the second connection disk 2042 of the connector 204 are automatically separated.

[0086] The cantilever beams 105a at both ends extend and rotate 180 degrees around the support shaft 111 together with the connecting rod 115 as the first hydraulic cylinder 117 and the second hydraulic cylinder 118 extend and change, until the initial rotary tiller deployment position is restored. In this process, the cylindrical hole on the second connecting plate 2042 of the connector 204 automatically matches and connects with the mushroom nail 206 of the first connecting plate 2041, realizing the synchronous rotation of the connecting shaft 202 and the spline shaft 205.

[0087] The folding mechanism provided by the present invention has a simple structure, occupies a small space, and can maintain the stability of the rotary tiller blade shaft in the unfolded state and the folded state.

[0088] like Fig.13 As shown, a cover plate 301 is installed on the top of the cross beam 105 and the suspension beam 105a of the rotary tiller, and a tail plate 302 is installed on the rear side of the cross beam 105 and the suspension beam 105a. The cover plate 301 and the tail plate 302 can effectively prevent the soil from splashing when the rotary tiller tills the land. The tail plate 302 can adjust its inclination angle through the lifting rod 303, and the tail plate 302 can also play a role in leveling and loosening the soil. A plurality of limiting wheels 304 are respectively fixed to the front end of the corresponding cross beam 105 or suspension beam 105a through the adjustment bracket 305. The height of the limiting wheel 304 from the ground can be adjusted by adjusting the installation position of the bolt hole of the limiting wheel 304 on the adjustment bracket 305, thereby effectively adjusting the rotary tillage depth of the rotary tiller in the soil.

[0089] At the same time, triangular plows 306 are respectively arranged at the front side below the main reduction box 104 and the front side below the auxiliary reduction box 106. The triangular plows 306 arranged at the front side below the main reduction box 104 and the triangular plows 306 arranged at the auxiliary reduction box 106 can effectively make up for the rotary tillage gap when the reduction box position lacks a rotary tillage blade, and achieve a soil loosening and full coverage effect.

[0090] When the engine output power drives the main transmission shaft 102 through the transmission device to drive the active bevel gear 103 to rotate, the active bevel gear 103 drives the driven bevel gear 103a in the main reduction box 104 to rotate, and then drives the first cylindrical gear 1042 to rotate, and then drives the two first rotary tiller shafts 108 to rotate synchronously through the second cylindrical gear 1043 and the third cylindrical gear 1044, driving the rotary tiller blades of the two first rotary tiller shafts 108 (each set of blades has equal spacing and is fixed on the rotary tiller shaft in positive and negative alternations) to penetrate deep into the soil and loosen the soil.

[0091] At the same time, the active bevel gear 103 drives the driven bevel gear 103a in the main reduction box 104 to rotate, and then drives the horizontal shaft 1041 to rotate. The horizontal shaft 1041 drives the first cylindrical gear 1061 of the auxiliary gear box in the auxiliary reduction box 106 to rotate through the transmission shaft 107, the connecting shaft 202, the connector 204, and the spline shaft 205 on both sides, and then drives the two second rotary tiller shafts 109 to rotate synchronously through the second cylindrical gear 1062 of the auxiliary gear box and the third cylindrical gear 1063 of the auxiliary gear box, driving the rotary tiller blades of the two second rotary tiller shafts 109 to penetrate into the soil and loosen the soil.

[0092] The foldable rotary tiller provided by the present invention can not only greatly improve the single operation area of ​​the rotary tiller and improve the efficiency of land rotary tillage by adopting a folding method, but also effectively meet the dimensional parameter requirements of the rotary tiller suspension during normal driving. At the same time, the use of a double-cylinder hydraulic folding system and a double-disc (connector) connection method can effectively improve its folding effect and stability, and ensure its power transmission effect, etc. The test results show that the foldable rotary tiller can greatly improve the efficiency and quality of rotary tillage operations.

[0093] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A foldable rotary tiller, characterized in that: include: beam; A main reduction gearbox, which is fixedly mounted on the crossbeam, a power input end of the main reduction gearbox is connected to a power output shaft of the tractor engine, and a power output end of the main reduction gearbox is located below the crossbeam; Two first rotary tiller shafts are arranged below the cross beam along the length direction of the cross beam and are respectively located on both sides of the main reduction gearbox and are connected to the power output end of the main reduction gearbox; Two suspension beams, which are respectively arranged at two ends of the cross beam; Two auxiliary reduction gearboxes, which are fixedly mounted on the two suspension beams in a one-to-one correspondence; Two transmission mechanisms are arranged one by one with the two auxiliary reduction boxes; one end of the transmission mechanism is connected to the power input end of the main reduction box, and the other end is selectively connected to the input end of the corresponding auxiliary reduction box; Wherein, the power output end of the auxiliary reduction box is located below the suspension beam; Two second rotary tiller shafts are arranged under the two suspension beams in a one-to-one correspondence, and the two second rotary tiller shafts are connected to the power output ends of the two auxiliary reduction boxes in a one-to-one correspondence; Two folding mechanisms, which are arranged one by one corresponding to the two suspension beams and are used to connect the corresponding suspension beams and the cross beam; Among them, when the rotary tiller is in a working state, the folding mechanism is unfolded, the transmission mechanism is connected to the input end of the auxiliary reduction box, and the first rotary tiller shaft and the second rotary tiller shaft rotate synchronously; when the rotary tiller is in a non-working state, the folding mechanism is folded, the transmission mechanism is disconnected from the input end of the auxiliary reduction box, and the suspension beam together with the second rotary tiller shaft and the auxiliary reduction box flip over the crossbeam.

2. The foldable rotary tiller according to claim 1, characterized in that: The transmission mechanism comprises: A transmission shaft, one end of which is connected to the power input end of the main reduction gearbox; A support plate, which is fixedly arranged on the top of the crossbeam; A connecting shaft passes through the support plate through a bearing support, one end of the connecting shaft is connected to the other end of the transmission shaft, and the other end is selectively connected to the input end of the auxiliary reduction box.

3. The foldable rotary tiller according to claim 2, characterized in that: The main reduction gearbox comprises: A main transmission shaft, one end of which is connected to the tractor's engine power output shaft and the other end of which is provided with a driving bevel gear; A transverse axis is arranged along the length direction of the crossbeam, and both ends of the transverse axis are rotatably supported on the main reduction gearbox housing; Wherein, the main transmission shaft is perpendicular to the horizontal axis; A driven bevel gear, which is coaxially fixedly mounted on the transverse shaft and meshes with the driving bevel gear; A first cylindrical gear, which is coaxially fixedly mounted on the transverse shaft; a second cylindrical gear meshing with the first cylindrical gear; a third cylindrical gear meshing with the second cylindrical gear; Wherein, the third cylindrical gear is connected to the two first rotary tiller shafts at the same time, and the transmission shaft is connected to the transverse shaft.

4. The foldable rotary tiller according to claim 3, characterized in that: The transmission shaft and the transverse shaft as well as the connecting shaft and the transmission shaft are connected respectively via a cross-shaped fork structure.

5. The foldable rotary tiller according to claim 1, characterized in that: The tops of the cross beam and the suspension beam are respectively provided with cover plates, and the rear sides of the cross beam and the suspension beam are respectively provided with tail plates.

6. The foldable rotary tiller according to claim 5, characterized in that: The front sides of the cross beam and the suspension beam are both provided with limiting wheels; the limiting wheels are connected to the corresponding cross beam or suspension beam via an adjusting bracket, and the height of the limiting wheels from the ground can be adjusted by changing the connection position of the adjusting bracket and the cross beam.

7. The foldable rotary tiller according to claim 5 or 6, characterized in that: The tail plate and the cross beam, as well as the tail plate and the suspension beam are respectively connected via a plurality of lifting rods, and the elevating rods can be extended or shortened to adjust the inclination angle of the tail plate.

8. A connector for the foldable rotary tiller according to claim 2, characterized in that: The selective connection between the connecting shaft and the input end of the auxiliary reduction gearbox is realized by the connector, and the connector comprises: A first connecting disk, which is in the shape of a disk and is coaxially fixedly connected to the connecting shaft; A plurality of mushroom nails are arranged on the first connecting disk in an array along the circumference of the first connecting disk; Wherein, the tip of the mushroom nail is arranged toward an end away from the connecting shaft; The second connection disk is in the shape of a disk and is coaxially arranged with the first connection disk; a plurality of cylindrical holes are formed on the second connection disk, and the cylindrical holes are arranged one by one corresponding to the mushroom nails; when the first connection disk is engaged with the second connection disk, the mushroom nails are inserted into the corresponding cylindrical holes; Wherein, the second connecting disk is connected to the input end of the auxiliary reduction box connecting mechanism.

9. The connector according to claim 8, characterized in that: A rubber ring is sleeved on the mushroom nail, and the mushroom nail contacts the hole wall of the cylindrical hole through the rubber ring.

10. A folding mechanism, used for the folding rotary tiller according to claim 1, characterized in that: include: A pair of first support frames, the bottoms of which are respectively fixedly arranged on the front side and the rear side of the crossbeam; A pair of second support frames, the bottoms of which are respectively fixedly arranged on the front side and the rear side of the suspension beam; A sleeve, one end of which is rotatably supported simultaneously on the top of the first support frame at the rear side of the cross beam and the top of the second support frame at the rear side of the suspension beam, and the other end of which is rotatably supported simultaneously on the top of the first support frame at the front side of the cross beam and the top of the second support frame at the front side of the suspension beam; A support shaft rotatably passes through the sleeve, and both ends of the support shaft extend to the outside of the sleeve respectively; A connecting rod, one end of which is rotatably sleeved on the supporting shaft; A connecting rod pin shaft, which rotatably passes through the other end of the connecting rod, and the connecting rod pin shaft is arranged parallel to the supporting shaft; A first hydraulic cylinder, whose cylinder barrel is hinged to the crossbeam; a piston rod is hinged to the connecting rod pin and can rotate around the connecting rod pin; The second hydraulic cylinder has a cylinder barrel hinged to the suspension beam; a piston rod hinged to the connecting rod pin and capable of rotating around the connecting rod pin.

Images