Multifunctional integrated harvester gearbox structure

Abstract

The utility model discloses a multifunctional integrated harvester gearbox structure which is characterized in that a rocker arm assembly, a shifting fork and a shifting fork shaft form a speed change shifting fork assembly, the rocker arm assembly drives the shifting fork to move on the shifting fork shaft, the gear shifting and speed changing functions are achieved, and a rocker is driven to enable a first transmission shaft to rotate; the first transmission shaft drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the screw rod to rotate, then the nut moves in the axis direction of the screw rod, and turning transmission of driving force is achieved through transmission of the bevel gears. The shifting fork shaft is also fixedly connected in the shell, meanwhile, the shifting fork feet on the shifting fork are clamped in the connecting grooves in the gear switch to achieve limiting, and therefore the nut cannot rotate and only can horizontally move, and the overall structure guarantees the gear shifting stability through transmission of the gear and the screw.

Description

Technical Field

[0001] The utility model relates to a multifunctional integrated harvester gearbox structure. Background Art

[0002] The transmission, also known as the gearbox, is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or divided manner. The transmission consists of a speed transmission mechanism and an operating mechanism. Some cars also have a power output mechanism. Most transmission mechanisms use ordinary gear transmissions, and some use planetary gear transmissions. Ordinary gear transmission speed change mechanisms generally use sliding gears and synchronizers.

[0003] Traditional agricultural machinery gearboxes use a shift fork to drive the speed gear to slide left and right, so that it meshes with different transmission gears to achieve the purpose of shifting. When this structure is moving on a steep slope or muddy field, the speed gear will shift due to the axial force, resulting in a semi-meshing state between the gears, causing damage to the meshing of the gear tooth surface and easy disengagement of the gearbox. This patent aims to provide a new type of speed shifting structure. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and to provide a multifunctional integrated harvester gearbox structure.

[0005] A multifunctional integrated harvester gearbox structure includes an input gear shaft assembly, a shift shaft assembly, a speed shift fork assembly, a speed shift shaft assembly, a steering clutch assembly, an idler shaft assembly, a left output shaft assembly, and a right output shaft assembly. The input gear shaft assembly includes an input gear shaft, which is installed in the gearbox through a bearing, and an external gear is fixed on the input gear shaft.

[0006] The shift shaft assembly includes a shift shaft, which is installed in the gearbox through a bearing and is located below the input gear shaft. The shift shaft is provided with a driven gear, a plurality of speed gears and a transition gear. The speed gear is rotatably installed on the speed shaft, the transition gear is fixedly connected to the speed shaft, and a shift switch is movably connected to the transition gear. The shift switch is used for connecting the transition gear and the speed gear, and the driven gear is used for meshing with the external gear.

[0007] The speed shift fork assembly is used to control the movement of the gear switch. The speed shift fork assembly includes a rocker arm assembly, a shift fork, and a shift fork shaft. The shift fork is a cylindrical structure. A through hole along the axis direction is provided at the center of the bottom surface. The shift fork is provided with the same number of shift fork feet as the gear switch. The shift fork feet are connected to the connecting groove of the gear switch. The shift fork is movably sleeved on the shift fork shaft. A plurality of gear stop points are provided at intervals on the shift fork shaft.

[0008] The rocker arm assembly includes a rocker, a first bevel gear, a second bevel gear, a frame, a first transmission shaft, a screw, and a nut. The frame is fixed on the fork shaft. A through hole is provided on the surface of the frame. The screw rotates and penetrates through the through hole of the frame. The screw is parallel to the fork shaft. A second bevel gear is provided at one end of the screw. The second bevel gear meshes with the first bevel gear. The first bevel gear is fixed on the first transmission shaft. The first transmission shaft is perpendicular to the screw. The first transmission shaft is fixedly connected to the rocker. The nut is threadedly connected to the screw. The outer side wall of the nut is fixedly connected to the fork.

[0009] The speed change shaft assembly includes a speed change shaft, which is installed in the gearbox through a bearing and is located below the shift shaft. The speed change shaft is fixed with the same number of gear gears as the speed change gears and meshing with each other.

[0010] The steering clutch assembly is located below the speed change shaft and is used to control the steering. The idler shaft assembly is used to transmit power to the left output shaft assembly and the right output shaft assembly. The left output shaft assembly and the right output shaft assembly are used to transmit power to the left and right tracks respectively.

[0011] Preferably, the shift shaft is provided with a bearing, a driven gear, a speed gear 1, a transition gear 1, a speed gear 2, a transition gear 2, a speed gear 3, and a bearing in sequence, and the speed gears are all sleeved on the outside of the shift shaft through needle bearings.

[0012] The speed gears all include a gear part and an external spline part. The gear part is used to mesh with the gear gear, and the external spline part is used to connect with the gear switch. The gear switch is a circular ring structure with an internal spline structure on its inner wall. The outer side of the transition gear is provided with an external spline structure for connecting to the internal spline structure of the gear switch.

[0013] Preferably, at least one clamping groove is provided on the shift shaft, and a clamping ring is provided in the clamping groove, and the clamping ring is used to axially limit the parts on the shift shaft.

[0014] Preferably, the speed change shaft is provided with a bearing, a first gear gear, a second gear gear, a third gear gear, and a bearing in sequence. The first gear gear is meshed with speed change gear one, the second gear gear is meshed with speed change gear two, and the third gear gear is meshed with speed change gear three. Spacers are provided between the gear gears, and the spacers are used to axially limit and adjust the position of the gear gears.

[0015] Preferably, the steering clutch assembly includes a steering clutch shaft, a bearing, a left steering gear, a central gear, a right steering gear, and a bearing. The right end of the left steering gear is connected to the left end of the central gear by a tooth structure, and the left end of the right steering gear is connected to the right end of the central gear by a tooth structure.

[0016] The bearings on both sides of the steering clutch shaft are respectively embedded in the left brake cylinder and the right brake cylinder. The right end face of the left brake cylinder is provided with a blind hole, and the left end face of the right brake cylinder is provided with a blind hole, and brake pads are provided in the blind holes. The outer sides of the left steering gear and the right steering gear are provided with gears, external splines, and annular grooves. The inner side is provided with a step through hole structure. The external splines are engaged with the brake pads, and the annular groove is used to connect the shift fork. A spring is provided in the step through hole. The spring is sleeved on the steering clutch shaft, one end of which is against the step end face of the step through hole, and the other end is against the bearing.

[0017] Preferably, the idler shaft assembly includes an idler shaft, on which a bearing, a left duplex gear, a right duplex gear, and a bearing are sequentially arranged, a shaft sleeve is arranged between the left duplex gear and the right duplex gear, the left duplex gear is meshed with the left steering gear, and the right duplex gear is meshed with the right steering gear.

[0018] Preferably, the left output shaft assembly consists of a left drive gear, a left half-shaft, a left half-shaft cylinder, and a left track drive sprocket. The outer circle of the left drive gear is a gear structure, and the center is an internal spline hole structure. The left drive gear is installed on the external spline at the right end of the left half-shaft and is meshed with the left duplex gear. Both ends of the left half-shaft have bearing blocks and external spline structures. The right end is installed inside the gearbox by relying on a bearing, and the left end extends out of the gearbox and is installed in the left half-shaft cylinder by relying on a bearing. The external spline at the left end extends out of the left half-shaft cylinder for installing the left track drive sprocket.

[0019] Preferably, the right output shaft assembly has the same structure as the left output shaft assembly.

[0020] Preferably, the gear stop point is a first annular groove, the cross-section of the first annular groove is trapezoidal, the width of the groove mouth is greater than the width of the groove bottom, a first plurality of annular grooves are provided on the outer arc surface of the fork shaft, and a second annular groove with the fork axis as the center is provided on the bottom surface of the fork and located outside the edge of the through hole mouth, a plurality of circular holes are provided on the inner side wall of the second annular groove close to the axis at intervals in the circumferential direction, a spherical card bead is movably provided in the circular hole, and a compression spring is provided between the card bead and the inner side wall of the second annular groove away from the fork axis.

[0021] Beneficial effects: Compared with the prior art, the utility model comprises a shift fork assembly through a rocker arm assembly, a shift fork and a shift fork shaft, and drives the shift fork to move on the shift fork shaft through the rocker arm assembly to realize the function of gear shifting and speed change, and drives the first transmission shaft to rotate, and the first transmission shaft drives the first bevel gear to rotate, and the first bevel gear drives the second bevel gear to rotate, and the second bevel gear drives the screw to rotate, thereby making the nut move along the axis direction of the screw, wherein the transmission of the bevel gear realizes the directional transmission of the driving force, since the nut is fixedly connected to the shift fork, and the shift fork is sleeved on the shift fork shaft, the shift fork shaft is also fixedly connected in the housing, and at the same time, the shift fork foot on the shift fork is clamped in the connecting groove on the gear switch to realize limiting, so the nut will not rotate but only translate, and the overall structure ensures the stability of gear shifting through the transmission of gears and screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of a crawler-type clutch-shift gearbox;

[0023] Figure 2 is a schematic diagram of a shift fork assembly;

[0024] Figure 3 is a schematic diagram of the input gear shaft assembly;

[0025] Figure 4 is a schematic diagram of the input gear shaft;

[0026] Figure 5 is a schematic diagram of a shift shaft assembly;

[0027] Figure 6 is a schematic diagram of the shift shaft;

[0028] Figure 7 is a schematic diagram of a speed change shaft assembly;

[0029] Figure 8 is a schematic diagram of the steering clutch assembly;

[0030] Fig. 9 is a schematic diagram of the idler shaft assembly;

[0031] Fig.10 is a schematic diagram of the left output shaft;

[0032] Fig.11 is a schematic diagram of the right output shaft;

[0033] Fig.12 It is the working principle diagram of the rocker arm assembly;

[0034] In the figure, 1, input gear shaft assembly, 2, shift shaft assembly, 3, speed shaft assembly, 4, speed fork assembly, 5, steering clutch shaft assembly, 6, idler shaft assembly, 7, left output shaft assembly, 8, right output shaft assembly, 9, left housing of gearbox, 10, right housing of gearbox, 101, bearing one, 102, input gear shaft, 103, bearing two, 1021, bearing block one, 1022, external gear, 1023, bearing block two, 1024, internal spline blind hole, 201, bearing three, 202, driven gear, 203, speed gear one, 204, needle bearing one, 205, gear switch one, 206, shift shaft, 207, speed gear two, 208, needle roller bearing 2, 209, gear switch 2, 2010, snap ring 1, 2011, spline sleeve, 2012, snap ring 2, 2013, speed gear 3, 2014, needle roller bearing 3, 2015, bearing 4, 2061, bearing block 3, 2062, external spline 1, 2063, optical axis 1, 2064, external spline 2, 2065, optical axis 2, 2066, slot 1, 2067, external spline 3, 2068, slot 2, 2069, optical axis 3, 20610, bearing block 4, 301, bearing 5, 302, spacer 1, 303, first gear, 304, speed shaft, 305, second gear, 306, spacer 2, 3 07, third gear, 308, bearing six, 401, rocker arm assembly, 4011, rocker, 4012, first transmission shaft, 4013, first bevel gear, 4014, second bevel gear, 4015, screw, 4016, nut, 4017, frame, 402, double fork, 4021, card ball, 4022, fork foot one, 4023, fork foot two, 403, fork shaft, 4031, first marble groove, 4032, second marble groove, 4033, third marble groove, 4034, fourth marble groove, 4035, fifth marble groove, 501, left brake cylinder seat assembly, 502, left return spring, 503, left steering gear, 5 04. Left lubricating copper sleeve one, 505. Steering clutch shaft, 506. Central gear, 507. Right lubricating copper sleeve one, 508. Right steering gear, 509. Right return spring, 5010. Right brake cylinder seat assembly, 601. Bearing seven, 602. Left lubricating copper sleeve two, 603. Left duplex gear, 604. Idle shaft, 605. Spacer three, 606. Right duplex gear, 607. Right lubricating copper sleeve two, 608. Bearing eight, 701. Left drive gear, 702. Left half shaft, 703. Left half shaft cylinder, 704. Left track drive sprocket, 801. Right drive gear, 802. Right half shaft, 803. Right half shaft cylinder, 804. Right track drive sprocket. DETAILED DESCRIPTION

[0035] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0036] like Figure 1-12 As shown, input gear shaft assembly 1, shift shaft assembly 2, speed shaft assembly 3, speed fork assembly 4, steering clutch shaft assembly 5, idler shaft assembly 6, left output shaft assembly 7, right output shaft assembly 8, gearbox left housing 9, gearbox right housing 10, bearing 1 101, input gear shaft 102, bearing 2 103, bearing block 1 1021, external gear 1022, bearing block 2 1023, internal spline blind hole 1024, bearing 3 201, driven gear 202, speed gear 1 203, needle bearing 1 204, gear switch 1 205, shift shaft 206, speed gear 2 207, roller bearing 1 Needle bearing 208, gear switch 209, snap ring 1 2010, spline sleeve 2011, snap ring 2 2012, speed gear 3 2013, needle bearing 3 20144, bearing 4 2015, bearing block 3 2061, external spline 1 2062, optical axis 1 2063, external spline 2 2064, optical axis 2 2065, slot 1 2066, external spline 3 2067, slot 2 2068, optical axis 3 2069, bearing block 4 20610, bearing 5 301, spacer 1 302, first gear 303, speed shaft 304, second gear 305, spacer 2 306, third gear Gear 307, bearing six 308, rocker arm assembly 401, rocker 4011, first transmission shaft 4012, first bevel gear 4013, second bevel gear 4014, screw 4015, nut 4016, frame 4017, double fork 402, fork notch 4021, fork foot one 4022, fork foot two 4023, fork shaft 403, first marble groove 4031, second marble groove 4032, third marble groove 4033, fourth marble groove 4034, fifth marble groove 4035, left brake cylinder seat assembly 501, left return spring 502, left steering gear 503, left Lubricating copper sleeve 1 504, steering clutch shaft 505, central gear 506, right lubricating copper sleeve 1 507, right steering gear 508, right return spring 509, right brake cylinder seat assembly 5010, bearing 701, left lubricating copper sleeve 2 602, left duplex gear 603, idler shaft 604, spacer sleeve 3 605, right duplex gear 606, right lubricating copper sleeve 2 607, bearing 8 608, left drive gear 701, left half shaft 702, left half shaft cylinder 703, left track drive sprocket 704, right drive gear 801, right half shaft 802, right half shaft cylinder 803, right track drive sprocket 804;

[0037] A crawler type meshing sleeve shift gearbox, which mainly consists of an input gear shaft assembly 1, a shift shaft assembly 2, a speed change shaft assembly 3, a steering clutch shaft assembly 5, a speed change fork assembly 4, an idler shaft assembly 6, a left output shaft assembly 7, a right output shaft assembly 8, a gearbox left housing 9, a gearbox right housing 10, etc.

[0038] The input gear shaft assembly 1 is composed of a bearing 1 101 , an input gear shaft 102 , and a bearing 2 103 .

[0039] The input gear shaft 102 is provided with a bearing stopper 1 1021 , an external gear 1022 , and a bearing stopper 2 1023 , and the center of the left end is an internal spline blind hole 1024 .

[0040] The input gear shaft assembly 1 is installed inside the left and right housings of the gearbox by means of bearing 1 101 and bearing 2 103, and the inner spline blind hole 1024 of the input gear shaft 102 faces outward. (The bearing hole 1 on the left housing 9 of the gearbox is a through-hole structure, and the outer spline end of the power input shaft extends into the gearbox from one of the bearing holes and is installed in the inner spline blind hole 1024 of the input gear shaft 102. External power is inputted from this, driving the input gear shaft 102 to rotate, thus realizing power input.)

[0041] The shift shaft assembly 2 is composed of a shift shaft 206, a bearing three 201, a driven gear 202, a needle bearing one 204, a speed gear one 203, a gear switch one 205, a needle bearing two 208, a speed gear two 207, a gear switch two 209, a retaining ring one 2010, a spline sleeve 2011, a retaining ring two 2012, a needle bearing three 2014, a speed gear three 2013, and a bearing four 2015.

[0042] The shift shaft 206 has a bearing block 3 2061, an external spline 1 2062, an optical axis 1 2063, an external spline 2064, an optical axis 2065, an external spline 3 2067, an optical axis 3 2069, and a bearing block 4 20610. A clamping groove 1 2066 and a clamping groove 2 2068 are provided on both sides of the external spline 3 2067.

[0043] Bearing three 201 and bearing four 2015 are respectively installed at bearing stopper three 2061 and bearing stopper four 20610 of the shift shaft 206.

[0044] The center of the driven gear 202 is an inner spline through-hole structure, and the outer circle is a gear structure. The inner spline of the driven gear 202 matches the outer spline 1 2062 of the shift shaft 206. The driven gear 202 is installed on the outer spline 1 2062 of the shift shaft 206 through the inner spline.

[0045] The needle bearing 204 is installed on the outer circle of the optical axis 2063 of the shift shaft 206.

[0046] The speed gear 1 203 is a step structure, the large outer circle is a gear structure, the small outer circle is an external spline structure, and the center is a smooth through hole structure, and the through hole size is equal to the outer circle size of the needle roller bearing 1 204. The parameters of the external spline of the speed gear 1 203 are consistent with the parameters of the external spline 2064 of the shift shaft 206. The speed gear 1 203 is installed on the outer circle of the needle roller bearing 1 204 and can flexibly rotate.

[0047] The gear switch 1 205 is a circular ring structure, with an annular groove on the outer circle and an inner spline hole structure in the center. The inner spline of the gear switch 1 205 matches the outer spline of the small outer circle of the speed change gear 1 203. The gear switch 1 205 is installed on the outer spline 2064 of the shift shaft 206. The gear switch 1 205 can slide freely left and right along the outer spline of the small outer circle of the speed change gear 1 203 and the outer spline 2064 of the shift shaft 206 under the action of the double-linked shift fork 402.

[0048] Needle bearing 208 is installed on the outer circle of optical axis 2065 of shift shaft 206.

[0049] The speed change gear 207 is a step structure, the large outer circle is a gear structure, the small outer circle is an external spline structure, and the center is a smooth through hole structure, and the through hole size is equal to the outer circle size of the needle roller bearing 208. The speed change gear 207 is installed on the outer circle of the needle roller bearing 208 and can flexibly rotate.

[0050] The outer circle of the spline sleeve 2011 is an external spline structure, and the center is an internal spline hole structure. The external spline parameters of the spline sleeve 2011 are consistent with the small outer circle external spline parameters of the speed change gear 207. The internal spline of the spline sleeve 2011 matches the external spline 3 2067 of the shift shaft 206. The spline sleeve 2011 is installed on the external spline 3 2067 of the shift shaft 206.

[0051] Needle bearing three 2014 is installed on the outer circle of optical axis three 2069 of shift shaft 206.

[0052] The speed gear 3 2013 is a step structure, the large outer circle is a gear structure, the small outer circle is an external spline structure, and the center is a smooth through hole structure, and the through hole size is equal to the outer circle size of the needle roller bearing 3 2014. The external spline parameters of the speed gear 3 2013 are consistent with the external spline parameters of the small outer circle of the speed gear 2 207. The speed gear 3 2013 is installed on the outer circle of the needle roller bearing 3 2014 and can flexibly idle.

[0053] The second gear switch 209 is a circular ring structure, with an annular groove on the outer circle and an inner spline hole structure in the center. The width of the second gear switch 209 is less than or equal to the width of the spline sleeve 2011. The inner spline of the second gear switch 209 matches the small outer circle external spline of the second speed gear 207, the outer spline of the spline sleeve 2011 and the small outer circle external spline of the third speed gear 2013. The second gear switch 209 is installed on the outer spline of the spline sleeve 2011. The second gear switch 209 can slide freely left and right along the small outer circle external spline of the second speed gear 207, the outer spline of the spline sleeve 2011 and the small outer circle external spline of the third speed gear 2013 under the action of the double-linked shift fork 402.

[0054] The snap ring 1 2010 and the snap ring 2012 are respectively installed in the slot 1 2066 and the slot 2 2068 of the shift shaft 206, and limit the spline sleeve 2011 to prevent the spline sleeve 2011 and the speed gear 2 207 and the speed gear 3 2013 from being squeezed together, causing the phenomenon of following rotation and burning.

[0055] The shift shaft assembly 2 is installed inside the left and right housings of the gearbox by means of bearing three 201 and bearing four 2015, and the outer cylindrical gear part of the driven gear 202 is meshed with the outer cylindrical gear part of the input gear shaft 102.

[0056] The speed shift fork assembly 4 is composed of a rocker arm assembly 401 , a double shift fork 402 , and a shift fork shaft 403 .

[0057] There are multiple marble groove structures on the fork shaft 403 (five marble grooves on the fork shaft 403, i.e., gear stop points). Both ends of the fork shaft 403 are fixedly mounted inside the gearbox housing.

[0058] The shift fork is a cylindrical structure, and a through hole along the axis direction is provided at the center of the bottom surface thereof. The shift fork is provided with the same number of shift fork feet as the shift switch, and the shift fork feet are connected to the connecting groove of the shift switch. The shift fork is movably sleeved on the shift fork shaft, and a plurality of shift stop points are provided at intervals on the shift fork shaft.

[0059] The rocker arm assembly includes a rocker 4011, a first bevel gear 4013, a second bevel gear 4014, a frame 4017, a first transmission shaft 4012, a screw 4015, and a nut 4016. The frame 4017 is fixed on the fork shaft. A through hole is provided on the surface of the frame 4017. The screw 4015 rotates and penetrates in the through hole of the frame 4017. The screw 4015 is parallel to the fork shaft. A second bevel gear 4014 is provided at one end of the screw 4015. The second bevel gear 4014 meshes with the first bevel gear 4013. The first bevel gear 4013 is fixed on the first transmission shaft 4012. The first transmission shaft 4012 is perpendicular to the screw 4015. The first transmission shaft 4012 is fixedly connected to the rocker 4011. The nut 4016 is threadedly connected to the screw 4015. The outer side wall of the nut 4016 is fixedly connected to the fork.

[0060] The gear stop point is the first annular groove, the cross-section of the first annular groove is trapezoidal, the width of the groove mouth is greater than the width of the groove bottom, a first plurality of annular grooves are provided on the outer arc surface of the fork shaft 403, and a second annular groove with the fork axis as the center is provided on the outer side of the edge of the through hole on the bottom surface of the fork, a plurality of circular holes are provided on the inner side wall of the second annular groove close to the axis at intervals in the circumferential direction, a spherical card bead 4021 is movably provided in the circular hole, and a compression spring is provided between the card bead 4021 and the inner side wall of the second annular groove away from the fork axis.

[0061] Specifically, by driving the rocker 4011, the first transmission shaft 4012 rotates, the first transmission shaft 4012 drives the first bevel gear 4013 to rotate, the first bevel gear 4013 drives the second bevel gear 4014 to rotate, the second bevel gear 4014 drives the screw 4015 to rotate, and then the nut 4016 moves along the axial direction of the screw 4015, wherein the transmission of the bevel gears realizes the directional transmission of the driving force, since the nut 4016 is fixedly connected to the shift fork, and the shift fork is sleeved on the shift fork shaft, the shift fork shaft is also fixedly connected in the housing, and at the same time, the shift fork foot on the shift fork is clamped in the connecting groove on the gear switch to realize limiting, so the nut 4016 will not rotate but only translate.

[0062] The speed change shaft assembly 3 is composed of a speed change shaft 304 , a fifth bearing 301 , a first-gear gear 302 , a second-gear gear 305 , a second-gear gear 306 , a third-gear gear 307 , and a sixth bearing 308 .

[0063] The speed change shaft 304 is provided with a bearing stopper five and a bearing stopper six at both ends, and the middle part is an external spline structure.

[0064] The fifth bearing 301 and the sixth bearing 308 are respectively mounted at the fifth bearing stopper and the sixth bearing stopper of the speed change shaft 304 .

[0065] The center of the first gear 303 is an inner spline through-hole structure, and the outer circle is a gear structure. The inner spline of the first gear 303 matches the outer spline of the speed change shaft 304. The first gear 303 is installed on the outer spline of the speed change shaft 304 through the inner spline.

[0066] The center of the second gear 305 is an inner spline through-hole structure, and the outer circle is a gear structure. The inner spline of the second gear 305 matches the outer spline of the speed change shaft 304. The second gear 305 is installed on the outer spline of the speed change shaft 304 through the inner spline.

[0067] The center of the third gear 307 is an inner spline through-hole structure, and the outer circle is a gear structure. The inner spline of the third gear 307 matches the outer spline of the speed change shaft 304. The third gear 307 is installed on the outer spline of the speed change shaft 304 through the inner spline.

[0068] The spacer sleeve 1 302 and the spacer sleeve 2 306 are mounted on the external splines of the speed change shaft 304 to limit and adjust the first gear 303, the second gear 305 and the third gear 307, ensuring that they are in the appropriate position and fully meshed.

[0069] The speed change shaft assembly 3 is installed inside the left and right housings of the gearbox by means of bearing five 301 and bearing six 308, and the outer cylindrical gear part of the first gear 303 is meshed with the outer cylindrical gear part of the speed change gear one 203, the outer cylindrical gear part of the second gear 305 is meshed with the outer cylindrical gear part of the speed change gear two 207, and the outer cylindrical gear part of the third gear 307 is meshed with the outer cylindrical gear part of the speed change gear three 2013.

[0070] The following steering clutch shaft assembly 5, idle shaft assembly 6, left output shaft assembly 7, and right output shaft assembly 8 are general technologies and are only briefly described.

[0071] The steering clutch shaft assembly 5 is composed of a steering clutch shaft 505, a left brake cylinder seat assembly 501, a left return spring 502, a left steering gear 503, a left lubricating copper sleeve 504, a central gear 506, a right lubricating copper sleeve 507, a right steering gear 508, a right return spring 509, and a right brake cylinder seat assembly 5010.

[0072] The left brake cylinder seat assembly 501 and the right brake cylinder seat assembly 5010 are fixedly mounted on the left and right housings of the gearbox respectively, and the bearing blocks at both ends of the steering clutch shaft 505 extend into the bearings inside the left and right brake cylinder seat assemblies 5010 for installation and positioning.

[0073] The central gear 506 is press-fitted on the middle part of the steering clutch shaft 505, and the outer gear part of the central gear 506 meshes with the outer gear part of the second gear 305. A tooth structure is provided on both sides of the central gear 506. The outer circles of the left and right steering gears 508 are provided with gears, external splines, and annular groove structures, and the inside is a step hole structure. A tooth structure is provided at one end of the left and right steering gears 508. The left and right steering gears 508 are sleeved on the steering clutch shaft 505, respectively located on both sides of the central gear 506, and mesh with the central gear 506 by a tooth structure.

[0074] A left lubricating copper sleeve 504 and a right lubricating copper sleeve 507 are respectively installed between the left and right steering gears 508 and the steering clutch shaft 505 for lubrication transition and free rotation. The outer spline parts of the left and right steering gears 508 extend into the inner spline holes of the friction plates inside the left and right brake cylinder seat assemblies 5010 and mesh with each other. The left and right return springs 509 are installed in the large holes of the left and right steering gears 508.

[0075] Left and right steering forks are installed in the annular grooves of the left and right steering gears 508. When the left and right steering forks are moved, the left and right steering gears 508 can be separated from the central gear 506 and press the left and right brake cylinder seat assemblies 5010 to limit the rotation of one side of the gearbox, thereby realizing the steering function. When the left and right steering forks are moved back to their original positions, the left and right steering gears 508 can be re-engaged with the central gear 506 in a tooth structure under the action of the left and right return springs 509.

[0076] The idle shaft assembly 6 consists of an idle shaft 604 , a bearing seven 601 , a left duplex gear 603 , a left lubricating copper sleeve two 602 , a spacer sleeve three 605 , a right lubricating copper sleeve two 607 , a right duplex gear 606 , and a bearing eight 608 .

[0077] The left and right double gears 606 are sleeved on the idle shaft 604, and are limited in position by a spacer sleeve 3 605. A left lubricating copper sleeve 2 602 and a right lubricating copper sleeve 2 607 are respectively installed between the left and right double gears 606 and the idle shaft 604 for lubrication transition and free rotation. Bearing 7 601 and bearing 8 608 are installed on the bearing blocks at both ends of the idle shaft 604.

[0078] The idle shaft assembly 6 is installed inside the left and right housings of the gearbox by means of bearing seven 601 and bearing eight 608, and the large outer gear part of the left duplex gear 603 is meshed with the outer gear part of the left steering gear 503, and the large outer gear part of the right duplex gear 606 is meshed with the outer gear part of the right steering gear 508.

[0079] The left output shaft assembly 7 is composed of a left driving gear 701, a left half shaft 702, a left half shaft cylinder 703, a left track driving sprocket 704 and the like.

[0080] The outer circle of the left driving gear 701 is a gear structure, and the center is an internal spline hole structure. The left driving gear 701 is installed on the external spline at the right end of the left half shaft 702, and meshes with the small external gear part of the left double gear 603. Both ends of the left half shaft 702 have bearing blocks and external spline structures. The right end is installed inside the gearbox by bearings, and the left end extends out of the gearbox and is installed in the left half shaft cylinder 703 by bearings. The left end external spline extends out of the left half shaft cylinder 703, which is used to install the left track drive sprocket 704 to drive the left track of the vehicle to move.

[0081] The right output shaft assembly 8 is composed of a right driving gear 801, a right half shaft 802, a right half shaft cylinder 803, a right track driving sprocket 804 and the like.

[0082] The outer circle of the right driving gear 801 is a gear structure, and the center is an internal spline hole structure. The right driving gear 801 is installed on the external spline at the left end of the right half shaft 802, and meshes with the small external gear part of the right double gear 606. Both ends of the right half shaft 802 have bearing blocks and external spline structures. The left end is installed inside the gearbox by bearings, and the right end extends out of the gearbox and is installed in the right half shaft cylinder 803 by bearings. The right end external spline extends out of the right half shaft cylinder 803, which is used to install the right track drive sprocket 804 to drive the right track of the vehicle to move.

[0083] Specific working process: power is input from the internal spline blind hole 1024 of the input gear shaft 102, driving the input gear shaft 102 to rotate, thereby driving the driven gear 202 meshing therewith to rotate.

[0084] At this time, the double shift fork 402 is positioned on the first marble groove 4031 of the shift fork shaft 403, so that the shift switch 1 205 is simultaneously located on the small outer circle external spline of the speed change gear 1 203 and the second external spline 2064 of the shift shaft 206, realizing the interlocking of the two; at the same time, the shift switch 209 is entirely located on the small outer circle external spline of the speed change gear 207, and does not contact the spline sleeve 211 and the speed change gear 3 213.

[0085] At this time, the shift shaft drives the speed gear 1 to rotate, and the speed gear 2 and the speed gear 3 are idling relative to the shift shaft, and then the transmission is transmitted through the speed shaft assembly, the steering clutch shaft assembly, and the idle shaft assembly. The specific transmission is as follows Figure 1 As shown, the agricultural machinery vehicle is driven straight ahead at first gear speed.

[0086] When the vehicle needs to turn right during driving, the right steering gear 508 is shifted to the right by operating the steering fork rod stuck in the annular groove of the right steering gear 508 until the teeth of the right steering gear 508 are disengaged from the teeth of the central gear 506, and the power is lost. During the shifting of the right steering gear 508 to the right, pressure is applied to the inner and outer friction plates in the right brake cylinder seat assembly 5010, and the friction plates are gradually pressed, so that the right steering gear 508 is braked, and the right transmission system loses power.

[0087] The right return spring 509 is gradually compressed. At this time, the left side of the agricultural machinery vehicle moves normally, and the right side is braked to achieve the right turn. After the right turn is completed, the steering fork rod is pushed back to the original position, the right return spring 509 is extended, and the right steering gear 508 is pushed back to the original position, and the teeth of the central gear 506 are pressed again to obtain power.

[0088] The inner and outer friction plates in the right brake cylinder seat assembly 5010 return to a loose state, and the right steering gear 508 is no longer braked. The right transmission system resumes normal operation, and the vehicle resumes straight driving.

[0089] When the vehicle needs to turn left, the same procedure applies as for turning right.

[0090] When the vehicle needs to shift gears, the rocker arm assembly 401 is toggled to position the double shift fork 402 on the second ball groove 4032 of the shift fork shaft 403, so that the shift switch 1 205 is entirely located on the second external spline 2064 of the shift shaft 206 and does not contact the speed gear 1 203; the shift switch 2 209 is entirely located on the small outer circle external spline of the speed gear 2 207 and does not contact the spline sleeve 211 and the speed gear 3 2013.

[0091] At this time, speed gear 1, speed gear 2, and speed gear 3 are idling relative to the shift shaft. Therefore, the power is cut off at the shift shaft assembly 2, and no power is transmitted to the left and right sides of the vehicle. Ultimately, the agricultural machinery vehicle can only operate at neutral speed (stop state).

[0092] The rocker arm assembly 401 is turned to position the double shift fork 402 on the third ball groove 4033 of the shift fork shaft 403, so that the first shift switch 205 is located on the second external spline 2064 of the shift shaft 206 as a whole and does not contact the first speed gear 203; the second shift switch 209 is located on the small outer circle external spline of the second speed gear 207 and the external spline of the spline sleeve 2011 at the same time, so that the two are interlocked, and the second shift switch 209 does not contact the third speed gear 2013.

[0093] At this time, the shift shaft drives the speed gear 2 to rotate, while the speed gear 1 and the speed gear 3 idle relative to the shift shaft, so that the agricultural machinery vehicle travels straight at the second gear speed.

[0094] The rocker arm assembly 401 is turned to position the double shift fork 402 on the fourth ball groove 4034 of the shift fork shaft 403, so that the shift switch 1 205 is located on the outer spline 2064 of the shift shaft 206 as a whole and does not contact the speed gear 1 203; the shift switch 2 209 is located on the outer spline of the spline sleeve 2011 as a whole and does not contact the speed gear 2 207 and the speed gear 3 2013.

[0095] At this time, speed gear 1, speed gear 2, and speed gear 3 are idling relative to the shift shaft. Therefore, the power is cut off at the shift shaft assembly 2, and no power is transmitted to the left and right sides of the vehicle. Ultimately, the agricultural machinery vehicle can only operate at neutral speed (stop state).

[0096] The rocker arm assembly 401 positions the double shift fork 402 on the fifth ball groove 4035 of the shift fork shaft 403, so that the shift switch 1 205 is located on the second external spline 2064 of the shift shaft 206 as a whole and does not contact the speed gear 1 203; the shift switch 2 209 is located on the external spline of the spline sleeve 2011 and the small outer circle external spline of the speed gear 3 2013 at the same time, so that the two are interlocked, and the shift switch 2 209 does not contact the speed gear 2 207.

[0097] At this time, the shift shaft drives the speed gear to shift to the third gear, and the speed gear one and the speed gear two idle relative to the shift shaft, so that the agricultural machinery vehicle travels straight at the third gear speed.

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional integrated harvester gearbox structure, characterized in that: It includes an input gear shaft assembly, a shift shaft assembly, a speed shift fork assembly, a speed shift shaft assembly, a steering clutch assembly, an idler shaft assembly, a left output shaft assembly, and a right output shaft assembly. The input gear shaft assembly includes an input gear shaft, which is installed in the gearbox through a bearing, and an external gear is fixed on the input gear shaft. The shift shaft assembly includes a shift shaft, which is installed in the gearbox through a bearing and is located below the input gear shaft. The shift shaft is provided with a driven gear, a plurality of speed gears and a transition gear. The speed gear is rotatably installed on the speed shaft, the transition gear is fixedly connected to the speed shaft, and a gear switch is movably connected to the transition gear. The gear switch is used for connecting the transition gear and the speed gear. The driven gear is used to mesh with the external gear. The speed shift fork assembly is used to control the movement of the gear switch. The speed shift fork assembly includes a rocker assembly, a shift fork, and a shift fork shaft. The shift fork is a cylindrical structure, and a through hole along the axis direction is provided at the center of its bottom surface. The shift fork is provided with the same number of shift fork feet as the gear switch, and the shift fork feet are connected to the connecting groove of the gear switch. The shift fork is movably sleeved on the shift fork shaft, and a plurality of gear stop points are provided at intervals on the shift fork shaft. The rocker arm assembly comprises a rocker, a first bevel gear, a second bevel gear, a frame, a first transmission shaft, a screw and a nut. The frame is fixed on the fork shaft. A through hole is provided on the surface of the frame. The screw is rotatably penetrated in the through hole of the frame. The screw is parallel to the fork shaft. A second bevel gear is provided at one end of the screw. The second bevel gear meshes with the first bevel gear. The first bevel gear is fixed on the first transmission shaft. The first transmission shaft is perpendicular to the screw. The first transmission shaft is fixedly connected to the rocker. The nut is threadedly connected to the screw. The outer side wall of the nut is fixedly connected to the fork. The speed change shaft assembly comprises a speed change shaft, which is installed in the gearbox through a bearing and is located below the shift shaft. The speed change shaft is fixed with the same number of gear gears as the speed change gears and meshing with each other. The steering clutch assembly is located below the speed change shaft and is used to control the steering. The idle shaft assembly is used to transmit power to the left output shaft assembly and the right output shaft assembly. The left output shaft assembly and the right output shaft assembly are used to transmit power to the left and right tracks respectively.

2. The multifunctional integrated harvester gearbox structure according to claim 1, characterized in that: The shift shaft is provided with a bearing, a driven gear, a speed gear 1, a transition gear 1, a speed gear 2, a transition gear 2, a speed gear 3, and a bearing in sequence. The speed gears are all sleeved on the outside of the shift shaft through needle bearings. The speed change gears include a gear part and an external spline part. The gear part is used to mesh with the gear gear, and the external spline part is used to connect with the gear switch. The gear switch is a circular ring structure with an internal spline structure on its inner wall. The outer side of the transition gear is provided with an external spline structure for connecting to the internal spline structure of the gear switch.

3. The multifunctional integrated harvester gearbox structure according to claim 2, characterized in that: At least one clamping groove is arranged on the shift shaft, a clamping ring is arranged in the clamping groove, and the clamping ring is used to axially limit the parts on the shift shaft.

4. The multifunctional integrated harvester gearbox structure according to claim 2, characterized in that: The speed change shaft is provided with a bearing, a first gear gear, a second gear gear, a third gear gear and a bearing in sequence. The first gear gear is meshed with speed change gear one, the second gear gear is meshed with speed change gear two, and the third gear gear is meshed with speed change gear three. Spacers are provided between the gear gears, and the spacers are used to axially limit and adjust the position of the gear gears.

5. The multifunctional integrated harvester gearbox structure according to claim 4, characterized in that: The steering clutch assembly includes a steering clutch shaft, a bearing, a left steering gear, a central gear, a right steering gear, and a bearing. The right end of the left steering gear is connected to the left end of the central gear by a tooth structure, and the left end of the right steering gear is connected to the right end of the central gear by a tooth structure. The bearings on both sides of the steering clutch shaft are respectively embedded in the left brake cylinder and the right brake cylinder. The right end face of the left brake cylinder is provided with a blind hole, and the left end face of the right brake cylinder is provided with a blind hole, and brake pads are provided in the blind holes. The outer sides of the left steering gear and the right steering gear are provided with gears, external splines, and annular grooves, and the inner sides are provided with a step through hole structure. The external splines are engaged with the brake pads, and the annular grooves are used to connect the shift fork. A spring is provided in the step through hole, and the spring is sleeved on the steering clutch shaft, one end of which is against the step end face of the step through hole, and the other end is against the bearing.

6. The multifunctional integrated harvester gearbox structure according to claim 1, characterized in that: The idle shaft assembly includes an idle shaft, on which a bearing, a left duplex gear, a right duplex gear, and a bearing are arranged in sequence. A shaft sleeve is arranged between the left duplex gear and the right duplex gear. The left duplex gear is meshed with the left steering gear, and the right duplex gear is meshed with the right steering gear.

7. The multifunctional integrated harvester gearbox structure according to claim 6, characterized in that: The left output shaft assembly consists of a left driving gear, a left half-shaft, a left half-shaft cylinder, and a left track driving sprocket. The outer circle of the left driving gear is a gear structure, and the center is an internal spline hole structure. The left driving gear is installed on the external spline at the right end of the left half-shaft and meshes with the left duplex gear. Both ends of the left half-shaft have bearing blocks and external spline structures. The right end is installed inside the gearbox by relying on a bearing, and the left end extends out of the gearbox and is installed in the left half-shaft cylinder by relying on a bearing. The external spline at the left end extends out of the left half-shaft cylinder for installing the left track driving sprocket.

8. The multifunctional integrated harvester gearbox structure according to claim 7, characterized in that: The right output shaft assembly has the same structure as the left output shaft assembly.

9. The multifunctional integrated harvester gearbox structure according to claim 1, characterized in that: The gear stop point is a first annular groove, the cross-section of the first annular groove is a trapezoid, the width of the groove mouth is greater than the width of the groove bottom, a plurality of first annular grooves are provided on the outer arc surface of the fork shaft, a second annular groove with the fork axis as the center is provided on the bottom surface of the fork and located outside the edge of the through hole, a plurality of circular holes are provided on the inner side wall of the second annular groove close to the axis at intervals in the circumferential direction, a spherical card bead is movably provided in the circular hole, and a compression spring is provided between the card bead and the inner side wall of the second annular groove away from the fork axis.

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