Steering type self-propelled transfer machine with differential mechanism and steering wheel

Abstract

The utility model relates to the technical field of agricultural machinery steering, and discloses a steering type self-propelled transfer machine with a differential steering wheel, which comprises a rear agricultural machine frame and a front agricultural machine frame connected to the front of the rear agricultural machine frame through a square pipe frame, the steering wheel drives the driving mechanism to realize reciprocating rotation of the swing arm; an engine and a differential mechanism box body are installed in front of the front agricultural machine frame through an extension frame, a driving box is arranged at the top of the differential mechanism box body, a transmission mechanism driven by the engine is arranged in the driving box, and a brake assembly used for braking the transmission mechanism is installed on the side edge of the driving box; the whole structure is simple, the worm gear and the worm of the driving mechanism are arranged, the steering wheel synchronously steers, the labor-saving effect is achieved, and the transmission failure rate is low; due to the arrangement of the differential assembly, the rotating speed difference of the left and right driving wheels can be adjusted through the transmission half shaft, and steering is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery steering, in particular to a steering type self-propelled transport machine with a differential steering wheel. Background Art

[0002] At present, the plant protection machinery used for crops is mainly large self-propelled agricultural machinery, that is, agricultural machinery that has its own power and is controlled by a driver. For example, the Chinese patent with application number CN205113430U discloses a hydraulically controlled steering mechanism, including a crossbeam, a leg, a bushing, a steering link and a hydraulic cylinder. The lower end of the leg is equipped with a wheel, the upper end of the leg is equipped with a support shaft, the support shaft is vertically installed on the lower side of the crossbeam through the bushing, the hydraulic cylinder is fixed on the crossbeam, and the installation direction of the hydraulic cylinder is the same as the direction when the wheel is not rotating; the steering link is hinged at the telescopic end of the hydraulic cylinder, and the other end of the steering link is hinged to the swing arm, and the swing arm is fixed on the support shaft.

[0003] However, the above scheme has the following shortcomings: it adopts hydraulic cylinder drive, and one hydraulic cylinder can only drive one steering wheel to rotate, and the position of the steering wheel relative to the hydraulic cylinder and the steering connecting rod is fixed and cannot be adjusted. The hydraulic cylinder also needs to be equipped with a hydraulic pipeline system. The overall structure is complicated and prone to driving failures. In addition, common self-propelled agricultural machinery mostly adopts rear-wheel steering and front-wheel drive, so that one side of the front wheel turns a big turn and the other side turns a small turn. Relying solely on rear-wheel steering cannot achieve easy steering of the self-propelled agricultural machinery as a whole. For this reason, we have launched a self-propelled loader with a differential steering wheel steering. Utility Model Content

[0004] The utility model aims to provide a steering self-propelled carrier with a differential steering wheel to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-propelled loader with a steering wheel having a differential, comprising a rear agricultural machine frame and a front agricultural machine frame connected to the front of the rear agricultural machine frame through a square tube frame, a driving mechanism is installed in the middle of the rear agricultural machine frame through a connecting frame, a steering wheel is connected to the upper rear end of the driving mechanism, a swing arm is connected to the front end of the driving mechanism, and the steering wheel drives the driving mechanism to realize the reciprocating rotation of the swing arm;

[0006] Adjustment and fixing mechanisms are installed at both ends of the rear agricultural machine frame, and the adjustment and fixing mechanisms are used to adjust the height of the wheel frame mechanism at the bottom thereof, and the wheel frame mechanism is movably installed with a steering wheel;

[0007] A bottom connecting plate is installed at the rear end of the wheel frame mechanism, and a first connecting rod mechanism with adjustable length is movably connected between the left and right groups of bottom connecting plates. A top connecting plate located above the corresponding bottom connecting plate is also fixed to the rear end of the left wheel frame mechanism, and a second connecting rod mechanism with adjustable length is connected between the top connecting plate and the swing arm;

[0008] When the swing arm reciprocates, the second connecting rod mechanism and the first connecting rod mechanism realize synchronous steering of the left and right steering wheels;

[0009] The front of the front agricultural machine frame is equipped with an engine and a differential case through an extension frame. A drive box is provided on the top of the differential case. A transmission mechanism driven by the engine is provided inside the drive box. A brake assembly for braking the transmission mechanism is installed on the side of the drive box.

[0010] The output end of the transmission mechanism drives the differential assembly inside the differential case through the first chain, and the output ends on both sides of the differential assembly are connected with transmission half shafts, which are passed through the shaft tube fixed on the extension frame and are used to drive the driving wheel installed under the front agricultural machine frame.

[0011] Preferably, the connecting frame includes vertical arms connected to both sides of the lower end of the middle part of the rear agricultural machine frame by a first U-shaped bolt, longitudinal arms connected to the inner side of the vertical arms by a second U-shaped bolt, a longitudinal frame fixedly connected to the upper end of the rear part of the longitudinal arm, two front and rear groups of transverse frames fixed to the upper ends of the left and right groups of longitudinal frames, and a mounting plate fixed to the lower end of the middle part of the front transverse frame.

[0012] Preferably, the driving mechanism comprises a front box body fixed to the rear end of the mounting plate, a driving shaft arranged inside the front box body, a rear box body integrally connected to the rear end of the front box body, and a worm gear and a worm arranged inside the rear box body;

[0013] The rear end of the drive shaft extends into the rear box body and is connected to the middle of the front end of the worm gear. The front end of the drive shaft extends through the front box body and the mounting plate and is connected to the lower part of the swing arm.

[0014] The worm wheel is meshed with the side of the worm, a vertical cylinder is installed at the upper end of the rear box body, a rotating rod is arranged inside the vertical cylinder, the lower end of the rotating rod extends into the rear box body and is connected to the top of the worm, and the upper end of the rotating rod extends out of the vertical cylinder and is connected to the middle part of the lower end of the steering wheel.

[0015] Preferably, the rear portion of the connecting frame is also connected to a pedal seat mechanism, which includes a rectangular channel steel fixed to the upper ends of the front and rear groups of transverse frames, a plug-in rod inserted in the rectangular channel steel, a pedal fixed after the rear end of the plug-in rod extends out of the rectangular channel steel, a connecting seat socketed at the rear end of the plug-in rod, and a seat fixed on the top of the connecting seat through a column.

[0016] Preferably, the adjustment and fixing mechanism comprises a vertical plate installed at the front end of the rear agricultural machine frame by a third U-shaped bolt, a vertical seat tube welded and fixed at the rear end of the vertical plate, a vertical screw rod screwed at the top of the vertical seat tube, a hand wheel installed at the top of the vertical screw rod, a lifting plate slidably connected inside the vertical seat tube, and a vertical column extending out of the vertical seat tube connected to the middle part of the lower end of the lifting plate;

[0017] The lower end of the vertical screw rod extends into the vertical seat tube and then abuts against the top of the lifting plate. A spring is sleeved on the vertical column, and the spring is located at the lower end of the lifting plate and in the vertical seat tube.

[0018] Preferably, a limit plate is fixed at the bottom of the vertical column, and the wheel frame mechanism includes a vertical square tube fixed at the middle of the lower end of the limit plate and a wheel frame fixed at the lower end of the vertical square tube for mounting the steering wheel;

[0019] The bottom connecting plate is fixed to the rear end of the top of the wheel frame, and the top connecting plate is fixed to the rear end of the corresponding vertical square tube.

[0020] Preferably, the first connecting rod mechanism comprises a middle internal threaded barrel, side screws screwed at both ends of the middle internal threaded barrel, and a first connecting ring seat connected to the ends of the side screws, the first connecting ring seat is movably connected to the top of the corresponding bottom connecting plate through a first pin, and a first locking nut is also screwed on the side screw;

[0021] The second connecting rod mechanism includes an intermediate screw, a side internal threaded tube screwed at both ends of the intermediate screw, and a second connecting ring seat fixed at the end of the side internal threaded tube. The second connecting ring seat on the left is movably connected to the bottom of the top connecting plate through a second pin shaft, and the second connecting ring seat on the right is movably connected to the top front end of the swing arm through a third pin shaft. Second locking nuts are also screwed on both ends of the intermediate screw.

[0022] Preferably, a flywheel is provided at the output end of the engine, a first pulley is fixed in the middle of the flywheel, the transmission mechanism comprises a driving shaft provided inside a driving box, and two ends of the driving shaft extend out of the driving box and are respectively connected to a second pulley and a first driving gear, and a belt is connected between the first pulley and the second pulley;

[0023] A brake disc located inside the first driving gear is also fixed on the driving shaft, and the brake assembly includes a brake frame installed on the side of the driving box, connecting ears provided on both sides of the bottom of the brake frame, a brake pad movably connected between the two sets of connecting ears through a first pin rod, and a rotating arm movably connected to the groove on the top of the brake frame through a second pin rod;

[0024] The top of one end of the brake pad is connected to the brake frame through a tension spring, and the other end of the brake pad extends above the brake disc. The lower end of the rotating arm extends out of the slot and abuts against the upper end of the brake pad. The upper end of the rotating arm extends out of the slot and is connected to a pull wire.

[0025] Preferably, the differential assembly comprises two sets of half-shaft side gears arranged inside the differential case, a set of annular gears, a second drive gear meshed with the side of the annular gear, and a transmission shaft fixed in the middle of the second drive gear;

[0026] An annular seat is fixed to one end of the annular gear away from the half-shaft side gear, and two sets of gear racks are symmetrically connected to the inner end of the annular seat. The inner end of the gear rack extends out of the annular gear and is movably connected to a planetary gear through a gear shaft. The two sets of planetary gears are symmetrically meshed between the two sets of half-shaft side gears.

[0027] One end of the transmission shaft extends out of the differential case and is connected to a third driving gear, and the third driving gear is connected to the first driving gear through a first chain;

[0028] The inner end of one set of transmission half shafts passes through the annular seat and the inside of the annular gear and is connected to the middle of the corresponding half shaft side gear, and the inner end of the other set of transmission half shafts is directly connected to the middle of the corresponding half shaft side gear.

[0029] Preferably, a transmission box is installed at the bottom of both ends of the front agricultural machine frame through a vertical mounting seat, and a fourth driving gear and a fifth driving gear and a second chain connected between the fourth driving gear and the fifth driving gear are respectively provided at both ends of the transmission box;

[0030] The outer end of the transmission half shaft extends into the transmission box and is connected to the middle of the fourth driving gear. The driving wheel shaft fixed in the middle of the fifth driving gear extends out of the transmission box and is movably connected to the middle of the driving wheel.

[0031] Compared with the prior art, the utility model has the following beneficial effects: the steering wheel of the utility model drives the driving mechanism to realize the reciprocating rotation of the swing arm, and when the swing arm reciprocates, the second connecting rod mechanism and the first connecting rod mechanism realize the synchronous steering of the left and right steering wheels. The overall structure of the utility model is simple, and the arrangement of the worm wheel and the worm of the driving mechanism plays a labor-saving role, and the transmission failure rate is low;

[0032] The height of the wheel frame mechanism can be adjusted by adjusting the fixing mechanism. At the same time, the length of the first connecting rod mechanism can be adjusted to meet the connection between the left and right sets of wheel frame mechanisms at different distances. The length of the second connecting rod mechanism can be adjusted so that after the height of the left wheel frame mechanism is adjusted, it can also be connected to the swing arm.

[0033] Because one side of the front driving wheel turns a big curve and the other side turns a small curve, at this time, due to the setting of the differential assembly, the speed difference between the left and right driving wheels can be adjusted through the transmission half shaft. The self-propelled loader cannot rotate at the same speed when driving on a curve or turning. In this way, when the steering wheel is used to turn the steering wheel, the front driving wheel can adjust the speed difference between the two sides to achieve easy steering;

[0034] The pull wire extends backward and is fixed on a brake pedal installed on the pedal. When braking is needed, the foot steps down on the brake pedal, so that the brake pedal pulls the rotating arm through the pull wire to rotate clockwise with the second pin rod as the center, so that the lower end of the rotating arm presses downward against the brake pad, and the brake pad rotates clockwise with the first pin rod as the center until the brake pad is pressed tightly against the upper end surface of the brake disc, thereby achieving braking. The self-propelled mobile carrier can brake at any time when going uphill or downhill to prevent the vehicle from slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a three-dimensional structural diagram of the rear agricultural machine frame, the adjustment and fixing mechanism, the wheel frame mechanism, the first connecting rod mechanism, the connecting frame and the driving mechanism of the utility model;

[0036] Figure 2 It is a structural schematic diagram of the first connecting rod mechanism of the utility model;

[0037] Figure 3 It is a three-dimensional structural schematic diagram of the rear agricultural machine frame, the adjustment and fixing mechanism, the wheel frame mechanism and the connecting frame assembled according to the utility model;

[0038] Figure 4 It is a schematic diagram of the side section structure of the adjusting and fixing mechanism of the utility model;

[0039] Figure 5 It is a schematic diagram of the three-dimensional structure of the drive mechanism, pedal seat mechanism, transverse frame and mounting plate of the utility model;

[0040] Figure 6 It is a three-dimensional structural diagram of the connection between the swing arm, the drive shaft, the worm and the worm wheel of the utility model;

[0041] Figure 7 It is a three-dimensional structural diagram of the connection between the left wheel frame mechanism, the second connecting rod mechanism and the swing arm of the utility model;

[0042] Figure 8 It is a structural schematic diagram of the second connecting rod mechanism of the utility model;

[0043] Fig. 9 It is a three-dimensional structural diagram of the connection of the rear agricultural machine frame, the adjustment and fixing mechanism, the wheel frame mechanism, the first connecting rod mechanism, the second connecting rod mechanism, the driving mechanism and the pedal seat mechanism of the utility model;

[0044] Fig.10 It is a schematic diagram of the overall three-dimensional structure of the rear agricultural machine frame, the front agricultural machine frame, the engine, the drive box, the differential box and the driving wheel after being assembled in the utility model;

[0045] Fig.11 For this utility model Fig.10 A schematic diagram of a partial three-dimensional structure from another perspective;

[0046] Fig.12 A schematic diagram of the three-dimensional structure of the brake assembly and brake disc of the utility model;

[0047] Fig.13 It is a structural schematic diagram of the differential assembly of the utility model;

[0048] Fig.14 It is a schematic structural diagram of the fourth driving gear, the second chain and the fifth driving gear connected to each other in the utility model.

[0049] In the figure: 1, rear agricultural machine frame; 2, adjustment and fixing mechanism; 201, vertical seat tube; 202, hand wheel; 203, vertical plate; 204, third U-shaped bolt; 205, vertical screw; 206, limit plate; 207, spring; 208, vertical column; 209, lifting plate; 3, wheel frame mechanism; 301, top connecting plate; 302, bottom connecting plate; 303, wheel frame; 304, vertical square tube; 4, steering wheel; 5, first connecting rod mechanism; 501, first connecting ring seat; 502, side screw; 503, first locking nut; 504, middle Internal threaded cylinder; 6, connecting frame; 601, first U-shaped bolt; 602, vertical arm; 603, second U-shaped bolt; 604, longitudinal arm; 605, longitudinal frame; 606, transverse frame; 607, mounting plate; 7, driving mechanism; 701, front box; 702, rear box; 703, driving shaft; 704, worm; 705, worm gear; 8, pedal seat mechanism; 801, rectangular channel steel; 802, pedal; 803, connecting seat; 804, plug rod; 805, column; 806, seat; 9, steering wheel; 10, swing arm; 11, vertical Straight cylinder; 12, second connecting rod mechanism; 121, second connecting ring seat; 122, side internal thread cylinder; 123, second locking nut; 124, intermediate screw; 13, rotating rod; 14, driving wheel; 15, front agricultural machine frame; 16, square tube frame; 17, vertical mounting seat; 18, transmission box; 19, shaft cylinder; 20, flywheel; 21, engine; 22, first pulley; 23, belt; 24, drive box; 25, second pulley; 26, differential case; 27, brake disc; 28, first driving gear; 29, first chain; 30, third Driving gear; 31. driving shaft; 32. brake frame; 33. tension spring; 34. connecting ear; 35. first pin rod; 36. brake pad; 37. rotating arm; 38. pull wire; 39. slot; 40. second pin rod; 41. transmission shaft; 42. second driving gear; 43. annular gear; 44. annular seat; 45. gear frame; 46. gear shaft; 47. planetary gear; 48. half-shaft side gear; 49. driving half-shaft; 50. fourth driving gear; 51. driving wheel shaft; 52. second chain; 53. fifth driving gear; 54. extension frame. DETAILED DESCRIPTION

[0050] 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.

[0051] See also Figure 1-14 The utility model provides a technical solution: a self-propelled loader with a differential steering wheel, comprising a rear agricultural machine frame 1 and a front agricultural machine frame 15 connected to the front of the rear agricultural machine frame 1 through a square tube frame 16, and a driving mechanism 7 is installed in the middle of the rear agricultural machine frame 1 through a connecting frame 6;

[0052] The connecting frame 6 includes a vertical arm 602 connected to both sides of the lower end of the middle part of the rear agricultural machine frame 1 by a first U-shaped bolt 601, a longitudinal arm 604 connected to the inner side of the vertical arm 602 by a second U-shaped bolt 603, a longitudinal frame 605 fixedly connected to the upper end of the rear of the longitudinal arm 604, two front and rear groups of transverse frames 606 fixed to the upper ends of the left and right groups of longitudinal frames 605, and a mounting plate 607 fixed to the lower end of the middle part of the front transverse frame 606.

[0053] The driving mechanism 7 comprises a front box body 701 fixed to the rear end of the mounting plate 607, a driving shaft 703 arranged inside the front box body 701, a rear box body 702 integrally connected to the rear end of the front box body 701, and a worm wheel 705 and a worm 704 arranged inside the rear box body 702;

[0054] The rear end of the drive shaft 703 extends into the rear box body 702 and is connected to the middle of the front end of the worm gear 705. The front end of the drive shaft 703 extends through the front box body 701 and the mounting plate 607 and is connected to the lower part of the swing arm 10.

[0055] The worm gear 705 is meshed with the side of the worm 704. A vertical cylinder 11 is installed at the upper end of the rear box body 702. A rotating rod 13 is provided inside the vertical cylinder 11. The lower end of the rotating rod 13 extends into the rear box body 702 and is connected to the top of the worm 704. The upper end of the rotating rod 13 extends out of the vertical cylinder 11 and is connected to the middle of the lower end of the steering wheel 9.

[0056] A steering wheel 9 is connected to the upper rear end of the driving mechanism 7, and a swing arm 10 is connected to the front end of the driving mechanism 7. The steering wheel 9 drives the driving mechanism 7 to realize the reciprocating rotation of the swing arm 10.

[0057] A pedal seat mechanism 8 is also connected to the rear of the connecting frame 6, and the pedal seat mechanism 8 includes a rectangular channel steel 801 fixed to the upper ends of the front and rear sets of transverse frames 606, a plug-in rod 804 inserted into the rectangular channel steel 801, a pedal 802 fixed after the rear end of the plug-in rod 804 extends out of the rectangular channel steel 801, a connecting seat 803 socketed on the rear end of the plug-in rod 804, and a seat 806 fixed to the top of the connecting seat 803 through a column 805.

[0058] Adjustment and fixing mechanisms 2 are installed at both ends of the rear agricultural machine frame 1, and the adjustment and fixing mechanisms 2 are used to adjust the height of the wheel frame mechanism 3 at the bottom thereof, and the wheel frame mechanism 3 is movably installed with a steering wheel 4;

[0059] The adjusting and fixing mechanism 2 includes a vertical plate 203 installed at the front end of the rear agricultural machine frame 1 through a third U-shaped bolt 204, a vertical seat tube 201 welded and fixed at the rear end of the vertical plate 203, a vertical screw rod 205 screwed at the top of the vertical seat tube 201, a hand wheel 202 installed at the top of the vertical screw rod 205, a lifting plate 209 slidingly connected inside the vertical seat tube 201, and a vertical column 208 extending out of the vertical seat tube 201 connected to the middle part of the lower end of the lifting plate 209;

[0060] The lower end of the vertical screw 205 extends into the vertical seat tube 201 and then abuts against the top of the lifting plate 209 . The vertical column 208 is sleeved with a spring 207 , which is located at the lower end of the lifting plate 209 and in the vertical seat tube 201 .

[0061] like Figure 4 As shown, the vertical screw 205 is rotated clockwise by the hand wheel 202, so that the vertical screw 205 abuts against the lifting plate 209 and moves down along the inner wall of the vertical seat tube 201, and the vertical column 208 drives the wheel frame mechanism 3 and the steering wheel 4 to move down synchronously. At this time, the spring 207 is in a compressed state;

[0062] The vertical screw rod 205 is rotated counterclockwise by the hand wheel 202, and the lifting plate 209 is moved upward along the inner wall of the vertical seat tube 201 under the elastic force of the spring 207, and the vertical column 208 drives the wheel frame mechanism 3 and the steering wheel 4 to move upward synchronously;

[0063] When the steering wheel 4 and the wheel frame mechanism 3 rotate as a whole, the vertical column 208 and the lifting plate 209 on the top of the wheel frame mechanism 3 can also rotate synchronously without restriction.

[0064] In this way, the height of the wheel frame mechanism 3 can be adjusted to achieve the adjustment of the height of the rear agricultural machine frame 1 from the ground, while also ensuring that the steering wheel 4 can rotate without restriction;

[0065] A limit plate 206 is fixed at the bottom of the vertical column 208, and the wheel frame mechanism 3 includes a vertical square tube 304 fixed at the middle of the lower end of the limit plate 206 and a wheel frame 303 fixed at the lower end of the vertical square tube 304 for mounting the steering wheel 4;

[0066] The bottom connecting plate 302 is fixed to the top rear end of the wheel frame 303 , and the top connecting plate 301 is fixed to the rear end of the corresponding vertical square tube 304 .

[0067] A bottom connecting plate 302 is installed at the rear end of the wheel frame mechanism 3, and a first connecting rod mechanism 5 with adjustable length is movably connected between the left and right sets of bottom connecting plates 302;

[0068] The first connecting rod mechanism 5 includes a middle internal threaded barrel 504, side screws 502 screwed at both ends of the middle internal threaded barrel 504, and a first connecting ring seat 501 connected to the ends of the side screws 502. The first connecting ring seat 501 is movably connected to the top of the corresponding bottom connecting plate 302 through a first pin, and a first locking nut 503 is also screwed on the side screws 502.

[0069] In this way, the length of the first connecting rod mechanism 5 can be adjusted, thereby satisfying the connection between the left and right groups of wheel frame mechanisms 3 at different distances.

[0070] A top connecting plate 301 located above the corresponding bottom connecting plate 302 is also fixed to the rear end of the left wheel frame mechanism 3, and a second connecting rod mechanism 12 with adjustable length is connected between the top connecting plate 301 and the swing arm 10;

[0071] The second connecting rod mechanism 12 includes an intermediate screw 124, a side internal threaded tube 122 with two ends of the intermediate screw 124 screwed together, and a second connecting ring seat 121 fixed at the end of the side internal threaded tube 122. The second connecting ring seat 121 on the left side is movably connected to the bottom of the top connecting plate 301 through a second pin shaft, and the second connecting ring seat 121 on the right side is movably connected to the top front end of the swing arm 10 through a third pin shaft (and a bearing sleeved on the third pin shaft is also provided between the second connecting ring seat 121 on the right side and the swing arm 10 to reduce friction). Second locking nuts 123 are also screwed on both ends of the intermediate screw 124.

[0072] In this way, the length of the second connecting rod mechanism 12 can be adjusted, so that after the height of the left wheel carrier mechanism 3 is adjusted, the connection between it and the swing arm 10 can be achieved.

[0073] When the swing arm 10 reciprocates, the second link mechanism 12 and the first link mechanism 5 realize synchronous steering of the left and right steering wheels 4 .

[0074] The front agricultural machine frame 15 is provided with an engine 21 and a differential case 26 via an extension frame 54. A drive case 24 is provided on the top of the differential case 26. A transmission mechanism driven by the engine 21 is provided inside the drive case 24.

[0075] A flywheel 20 is provided at the output end of the engine 21, a first pulley 22 is fixed in the middle of the flywheel 20, a transmission mechanism comprises a driving shaft 31 provided inside a driving box 24, and two ends of the driving shaft 31 extend out of the driving box 24 and are respectively connected to a second pulley 25 and a first driving gear 28, a belt 23 is connected between the first pulley 22 and the second pulley 25;

[0076] A brake assembly for braking the transmission mechanism is installed on the side of the drive box 24;

[0077] A brake disc 27 located inside the first driving gear 28 is also fixed on the driving shaft 31. The brake assembly includes a brake frame 32 installed on the side of the driving box 24, connecting ears 34 provided on both sides of the bottom of the brake frame 32, a brake pad 36 movably connected between the two sets of connecting ears 34 through a first pin rod 35, and a rotating arm 37 movably connected to the slot 39 on the top of the brake frame 32 through a second pin rod 40;

[0078] The top of one end of the brake pad 36 is connected to the brake frame 32 through a tension spring 33, and the other end of the brake pad 36 extends above the brake disc 27. The lower end of the rotating arm 37 extends out of the slot 39 and abuts against the upper end of the brake pad 36. The upper end of the rotating arm 37 extends out of the slot 39 and is connected to a pull wire 38.

[0079] The output end of the transmission mechanism drives the differential assembly inside the differential case 26 through the first chain 29, and the output ends on both sides of the differential assembly are connected to the transmission half shaft 49, which passes through the shaft tube 19 fixed on the extension frame 54 and is used to drive the driving wheel 14 installed under the front agricultural machine frame 15.

[0080] The differential assembly includes two sets of half-shaft side gears 48 disposed inside the differential case 26, a set of ring gears 43, a second drive gear 42 meshed with the side of the ring gear 43, and a transmission shaft 41 fixed in the middle of the second drive gear 42;

[0081] An annular seat 44 is fixed to one end of the annular gear 43 away from the half-shaft side gear 48, and two sets of gear racks 45 are symmetrically connected to the inner end of the annular seat 44. The inner end of the gear rack 45 extends out of the annular gear 43 and is movably connected to a planetary gear 47 through a gear shaft 46. The two sets of planetary gears 47 are symmetrically meshed between the two sets of half-shaft side gears 48.

[0082] One end of the transmission shaft 41 extends out of the differential case 26 and is connected to the third driving gear 30 , and the third driving gear 30 is connected to the first driving gear 28 through the first chain 29 ;

[0083] The inner ends of one set of transmission half shafts 49 pass through the annular seat 44 and the annular gear 43 and are connected to the middle of the corresponding half shaft side gear 48 , while the inner ends of the other set of transmission half shafts 49 are directly connected to the middle of the corresponding half shaft side gear 48 .

[0084] A transmission box 18 is installed at the bottom of both ends of the front agricultural machine frame 15 through a vertical mounting seat 17. The transmission box 18 has a fourth driving gear 50 and a fifth driving gear 53 and a second chain 52 connected between the fourth driving gear 50 and the fifth driving gear 53 at both ends thereof.

[0085] The outer end of the transmission half shaft 49 extends into the transmission box 18 and is connected to the middle of the fourth driving gear 50. The driving wheel shaft 51 fixed in the middle of the fifth driving gear 53 extends out of the transmission box 18 and is movably connected to the middle of the driving wheel 14.

[0086] Specifically, when in use, the steering wheel 9 drives the rotating rod 13 to rotate clockwise or counterclockwise, so that the worm 704 at the bottom of the rotating rod 13 drives the worm wheel 705 to rotate, and the worm wheel 705 drives the swing arm 10 to reciprocate through the drive shaft 703. Such driving can achieve the effect of saving effort.

[0087] The swing arm 10 drives the left wheel frame mechanism 3 and the steering wheel 4 to rotate through the second connecting rod mechanism 12. At the same time, the left wheel frame mechanism 3 drives the right wheel frame mechanism 3 and the steering wheel 4 to rotate through the first connecting rod mechanism 5, thereby realizing synchronous steering of the left and right steering wheels 4.

[0088] The engine 21 drives the driving shaft 31, the brake disc 27 and the first driving gear 28 to rotate through the flywheel 20, the first pulley 22, the belt 23 and the second pulley 25;

[0089] At this time, the first driving gear 28 drives the third driving gear 30, the transmission shaft 41 and the second driving gear 42 to rotate through the first chain 29, and the second driving gear 42 drives the annular gear 43, the annular seat 44, the gear frame 45 and the planetary gear 47 to rotate synchronously, so that the planetary gear 47 drives the transmission half shaft 49 and the fourth driving gear 50 to rotate through the half shaft side gear 48;

[0090] Through the setting of the differential assembly, the inconsistent rotation speeds of the two sets of transmission half shafts 49 can be met;

[0091] The fourth driving gear 50 drives the driving wheel 14 to rotate through the second chain 52, the fifth driving gear 53 and the driving wheel shaft 51, so as to realize the forward or backward movement of the self-propelled vehicle.

[0092] The pull wire 38 extends backward and is fixed on the brake pedal installed on the pedal 802. When braking is needed, the foot steps down on the brake pedal, so that the brake pedal pulls the rotating arm 37 through the pull wire 38 to rotate clockwise with the second pin rod 40 as the center, so that the lower end of the rotating arm 37 presses downward against the brake pad 36, so that the brake pad 36 rotates clockwise with the first pin rod 35 as the center until the brake pad 36 is pressed tightly against the upper end surface of the brake disc 27, thereby achieving braking. The self-propelled carrier can brake at any time when going uphill or downhill to prevent the vehicle from slipping.

[0093] When the swing arm 10 reciprocates and realizes synchronous steering of the left and right steering wheels 4 through the second link mechanism 12 and the first link mechanism 5, the power of the engine 21 passes through the driving shaft 31 and then through the ring gear 43, the planetary gear 47 and the half-shaft side gear 48 of the differential assembly to reach the transmission half-shaft 49, and the transmission half-shaft 49 drives the driving wheel 14 to rotate through the fourth driving gear 50, the second chain 52, the fifth driving gear 53 and the driving wheel shaft 51;

[0094] Because one side of the front driving wheel 14 turns a big curve and the other side turns a small curve, at this time, due to the setting of the differential assembly, the speed difference between the left and right driving wheels 14 can be adjusted through the transmission half shaft 49, and the self-propelled carrier cannot rotate at the same speed when traveling on a curve or turning. In this way, when the steering wheel 4 is turned by the steering wheel 9, the front driving wheel 14 can adjust the speed difference between the speeds of the two sides to achieve easy steering.

[0095] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-propelled loader with a steering wheel and a differential gear, comprising a rear agricultural machine frame (1) and a front agricultural machine frame (15) connected to the front of the rear agricultural machine frame (1) through a square tube frame (16), characterized in that: A driving mechanism (7) is installed in the middle of the rear agricultural machine frame (1) via a connecting frame (6); a steering wheel (9) is connected to the upper rear end of the driving mechanism (7); a swing arm (10) is connected to the front end of the driving mechanism (7); the steering wheel (9) drives the driving mechanism (7) to realize reciprocating rotation of the swing arm (10); Adjustment and fixing mechanisms (2) are installed at both ends of the rear agricultural machine frame (1), and the adjustment and fixing mechanisms (2) are used to adjust the height of a wheel frame mechanism (3) at the bottom thereof, and the wheel frame mechanism (3) is movably installed with a steering wheel (4); A bottom connecting plate (302) is installed at the rear end of the wheel frame mechanism (3), a first connecting rod mechanism (5) with adjustable length is movably connected between the left and right groups of bottom connecting plates (302), a top connecting plate (301) located above the corresponding bottom connecting plate (302) is also fixed to the rear end of the left wheel frame mechanism (3), and a second connecting rod mechanism (12) with adjustable length is connected between the top connecting plate (301) and the swing arm (10); When the swing arm (10) reciprocates, the second connecting rod mechanism (12) and the first connecting rod mechanism (5) are used to achieve synchronous steering of the left and right sets of steering wheels (4); An engine (21) and a differential case (26) are installed in front of the front agricultural machine frame (15) via an extension frame (54); a drive box (24) is provided on the top of the differential case (26); a transmission mechanism driven by the engine (21) is provided inside the drive box (24); a brake assembly for braking the transmission mechanism is installed on the side of the drive box (24); The output end of the transmission mechanism drives the differential assembly inside the differential case (26) through a first chain (29), and the output ends on both sides of the differential assembly are connected to transmission half shafts (49), and the transmission half shafts (49) are penetrated through a shaft cylinder (19) fixed on an extension frame (54) and are used to drive a driving wheel (14) installed below a front agricultural machine frame (15).

2. A self-propelled vehicle with a steering wheel and differential according to claim 1, characterized in that: The connecting frame (6) comprises vertical arms (602) connected to both sides of the lower end of the middle part of the rear agricultural machine frame (1) by first U-shaped bolts (601), longitudinal arms (604) connected to the inner side of the vertical arms (602) by second U-shaped bolts (603), longitudinal frames (605) fixedly connected to the upper ends of the rear parts of the longitudinal arms (604), front and rear groups of transverse frames (606) fixed to the upper ends of the left and right groups of longitudinal frames (605), and a mounting plate (607) fixed to the lower end of the middle part of the front transverse frame (606).

3. The self-propelled vehicle with a steering wheel and differential according to claim 2, characterized in that: The driving mechanism (7) comprises a front box (701) fixed to the rear end of the mounting plate (607), a driving shaft (703) arranged inside the front box (701), a rear box (702) integrally formed and connected to the rear end of the front box (701), and a worm wheel (705) and a worm (704) arranged inside the rear box (702); The rear end of the drive shaft (703) extends into the interior of the rear box (702) and is connected to the middle of the front end of the worm gear (705); the front end of the drive shaft (703) extends through the front box (701) and the mounting plate (607) and is connected to the lower part of the swing arm (10); The worm wheel (705) is meshed with the side of the worm (704); a vertical cylinder (11) is installed at the upper end of the rear box (702); a rotating rod (13) is arranged inside the vertical cylinder (11); the lower end of the rotating rod (13) extends into the rear box (702) and is connected to the top of the worm (704); the upper end of the rotating rod (13) extends out of the vertical cylinder (11) and is connected to the middle of the lower end of the steering wheel (9).

4. The self-propelled loader with a steering wheel and differential according to claim 2, characterized in that: The rear part of the connecting frame (6) is also connected to a pedal seat mechanism (8), and the pedal seat mechanism (8) comprises a rectangular channel steel (801) fixed to the upper ends of the front and rear two sets of transverse frames (606), a plug-in rod (804) inserted into the rectangular channel steel (801), a pedal (802) fixed after the rear end of the plug-in rod (804) extends out of the rectangular channel steel (801), a connecting seat (803) sleeved at the rear end of the plug-in rod (804), and a seat (806) fixed to the top of the connecting seat (803) through a column (805).

5. The self-propelled loader with a steering wheel and differential according to claim 1, characterized in that: The adjusting and fixing mechanism (2) comprises a vertical plate (203) mounted on the front end of the rear agricultural machine frame (1) via a third U-shaped bolt (204), a vertical seat tube (201) welded and fixed at the rear end of the vertical plate (203), a vertical screw rod (205) screwed to the top of the vertical seat tube (201), a hand wheel (202) mounted on the top of the vertical screw rod (205), a lifting plate (209) slidingly connected inside the vertical seat tube (201), and a vertical column (208) extending out of the vertical seat tube (201) and connected to the middle part of the lower end of the lifting plate (209); The lower end of the vertical screw rod (205) extends into the vertical seat tube (201) and then abuts against the top of the lifting plate (209). A spring (207) is sleeved on the vertical column (208), and the spring (207) is located at the lower end of the lifting plate (209) and in the vertical seat tube (201).

6. The self-propelled vehicle with a steering wheel and differential according to claim 5, characterized in that: A limiting plate (206) is fixed at the bottom of the vertical column (208), and the wheel frame mechanism (3) comprises a vertical square tube (304) fixed at the middle of the lower end of the limiting plate (206) and a wheel frame (303) fixed at the lower end of the vertical square tube (304) for mounting the steering wheel (4); The bottom connecting plate (302) is fixed to the top rear end of the wheel frame (303), and the top connecting plate (301) is fixed to the rear end of the corresponding vertical square tube (304).

7. The self-propelled vehicle with a steering wheel and differential according to claim 6, characterized in that: The first connecting rod mechanism (5) comprises a middle internal threaded cylinder (504), side screws (502) screwed at both ends of the middle internal threaded cylinder (504), and a first connecting ring seat (501) connected to the ends of the side screws (502); the first connecting ring seat (501) is movably connected to the top of the corresponding bottom connecting plate (302) through a first pin, and a first locking nut (503) is also screwed on the side screw (502); The second connecting rod mechanism (12) comprises an intermediate screw rod (124), a side internal threaded tube (122) screwed at both ends of the intermediate screw rod (124), and a second connecting ring seat (121) fixed at the end of the side internal threaded tube (122), the second connecting ring seat (121) on the left side is movably connected to the bottom of the top connecting plate (301) through a second pin shaft, and the second connecting ring seat (121) on the right side is movably connected to the top front end of the swing arm (10) through a third pin shaft, and second locking nuts (123) are also screwed on both ends of the intermediate screw rod (124).

8. The self-propelled vehicle with a steering wheel and differential according to claim 1, characterized in that: The output end of the engine (21) is provided with a flywheel (20), a first pulley (22) is fixed in the middle of the flywheel (20), the transmission mechanism comprises a driving shaft (31) provided inside a driving box (24), and two ends of the driving shaft (31) extending out of the driving box (24) and respectively connected to a second pulley (25) and a first driving gear (28), a belt (23) being connected between the first pulley (22) and the second pulley (25); A brake disc (27) located inside the first driving gear (28) is also fixed on the driving shaft (31), and the brake assembly comprises a brake frame (32) installed on the side of the driving box (24), connecting ears (34) provided on both sides of the bottom of the brake frame (32), a brake pad (36) movably connected between the two groups of connecting ears (34) through a first pin rod (35), and a rotating arm (37) movably connected to the slot (39) at the top of the brake frame (32) through a second pin rod (40); The top of one end of the brake pad (36) is connected to the brake frame (32) through a tension spring (33), and the other end of the brake pad (36) extends above the brake disc (27), and the lower end of the rotating arm (37) extends out of the slot (39) and abuts against the upper end of the brake pad (36), and the upper end of the rotating arm (37) extends out of the slot (39) and is connected to a pull wire (38).

9. The self-propelled loader with a steering wheel and differential according to claim 8, characterized in that: The differential assembly comprises two sets of half-axle side gears (48) arranged inside the differential case (26), a set of ring gears (43), a second drive gear (42) meshed with the side of the ring gear (43), and a transmission shaft (41) fixed in the middle of the second drive gear (42); An annular seat (44) is fixed to one end of the annular gear (43) away from the half-shaft side gear (48), and two sets of gear racks (45) are symmetrically connected to the inner side end of the annular seat (44). The inner side end of the gear rack (45) extends out of the annular gear (43) and is movably connected to a planetary gear (47) through a gear shaft (46), and the two sets of planetary gears (47) are symmetrically meshed between the two sets of half-shaft side gears (48); One end of the transmission shaft (41) extends out of the differential case (26) and is connected to a third drive gear (30), and the third drive gear (30) is connected to the first drive gear (28) via a first chain (29); The inner end of one set of transmission half shafts (49) passes through the annular seat (44) and the annular gear (43) and is connected to the middle of the corresponding half shaft side gear (48), and the inner end of the other set of transmission half shafts (49) is directly connected to the middle of the corresponding half shaft side gear (48).

10. The self-propelled vehicle with a steering wheel and differential according to claim 9, characterized in that: A transmission box (18) is installed at the bottom of both ends of the front agricultural machine frame (15) through a vertical mounting seat (17), and a fourth driving gear (50) and a fifth driving gear (53) and a second chain (52) connected between the fourth driving gear (50) and the fifth driving gear (53) are respectively arranged at both ends of the transmission box (18); The outer end of the transmission half shaft (49) extends into the transmission box (18) and is connected to the middle of the fourth driving gear (50). The driving wheel shaft (51) fixed in the middle of the fifth driving gear (53) extends out of the transmission box (18) and is movably connected to the middle of the driving wheel (14).

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