CN106900284B - Transmission case - Google Patents
Transmission case Download PDFInfo
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- CN106900284B CN106900284B CN201710197140.6A CN201710197140A CN106900284B CN 106900284 B CN106900284 B CN 106900284B CN 201710197140 A CN201710197140 A CN 201710197140A CN 106900284 B CN106900284 B CN 106900284B
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- control
- transmission
- rotating shaft
- transmission control
- sliding
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
- A01D69/06—Gearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
- F16H39/04—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
The invention relates to a transmission case, which comprises a case body consisting of an upper case cover and a lower case body, a first transmission control structure and a second transmission control structure which are arranged on the upper case cover, a transmission assembly arranged in the case body and connected with a variable speed control input structure and a control output structure in a transmission manner, wherein the transmission assembly is connected with a steering control input structure and a control output structure in a transmission manner; the first transmission control structure comprises a first transmission control part and a first transmission control rotating shaft, and the second transmission control structure comprises a second transmission control part and a second transmission control rotating shaft; the transmission control input structure drives the first transmission control member and the second transmission control member to rotate by the same angle around the transmission control shafts respectively, and the rotation direction of the first transmission control member is opposite to that of the second transmission control member; the steering control input structure can drive one of the first transmission control member and the second transmission control member to rotate around the transmission control rotating shaft thereof, and the other transmission control member is kept static.
Description
Technical Field
The invention relates to a transmission case, in particular to a transmission case of a transmission system for a crawler-type line harvester.
Background
The contact area of the crawler belt and the ground is larger than that of the wheels, the unit area is stressed little, so that the vehicle is not easy to sink, the plough bottom layer cannot be damaged, and the crawler belt has good paddy field walking performance, so that the crawler belt is widely applied to agricultural machinery, such as a harvester, a cultivator and the like. A hydraulic transmission crawler-type harvester is provided, wherein a transmission control system of the hydraulic transmission crawler-type harvester comprises a hydraulic pump. The hydraulic pump is driven by the engine, oil is sucked from the hydraulic tank, pressure oil is formed and discharged and is sent to the motor for controlling the two crawler wheels to walk, and therefore walking control of the harvester is achieved. The existing hydraulic transmission crawler-type harvester can realize the forward and backward walking of the harvester by controlling the two motors to rotate at the same rotating speed and direction; the steering walking of the harvester can be realized by controlling the two motors to rotate at different rotating speeds or in different directions. By operating the hydraulic pump control panel, the oil pressure output to the motor can be controlled, thereby controlling the rotation speed and steering of the motor. The rotation angle and direction of the hydraulic pump control panel can control the motor: the rotation direction of the hydraulic pump control plate correspondingly controls the rotation direction of the motor, and the rotation angle of the hydraulic pump correspondingly controls the rotation speed of the motor.
The prior art hydraulic transmission crawler-type harvester has the following two control modes:
the first mode is a single-rod walking and double-rod steering control mode: the forward movement or the backward movement of the harvester is controlled by simultaneously operating a hydraulic pump control plate for controlling the two motors by adopting an operating rod; in addition, two operating rods are adopted to respectively operate hydraulic pump control plates for controlling the two motors so as to control the steering of the harvester.
The second is a single-rod walking and single-rod steering control mode: the forward movement or the backward movement of the harvester is controlled by simultaneously operating a hydraulic pump control plate for controlling the two motors by adopting an operating rod; in addition, an operating rod is adopted to respectively operate hydraulic pump control plates for controlling the two motors so as to control the steering of the harvester.
In the first control mode, the driver is required to switch the operation among the three operation levers, and the maneuverability is obviously poor for the driver with only two hands.
The second control mode can only carry out constant-speed steering on the spot: the two crawler wheels rotate at the same speed and oppositely to realize steering, and the crawler wheels cannot automatically return to the running speed before steering after the steering is finished, so that the turning speed is too high, danger is caused, and the driving experience is realized.
Disclosure of Invention
The invention provides a transmission case of a transmission system, which can realize single-rod operation of a harvester and realize turning of two crawler wheels at different speeds.
A transmission case, its characterized in that: the transmission mechanism comprises a box body consisting of an upper box cover and a lower box body, a first transmission control structure and a second transmission control structure which are arranged on the upper box cover, and a control output structure, a variable speed control input structure, a steering control input structure and a transmission assembly which are arranged in the box body; the transmission assembly is in transmission connection with the speed change control input structure and the control output structure, and is in transmission connection with the steering control input structure and the control output structure; the first transmission control structure comprises a first transmission control part and a first transmission control rotating shaft arranged at the end part of the first transmission control part, and the second transmission control structure comprises a second transmission control part and a second transmission control rotating shaft arranged at the end part of the second transmission control part; the transmission control input structure is capable of driving the first transmission control member and the second transmission control member to rotate by the same angle about their respective transmission control axes, and the first transmission control member rotates in a direction opposite to that of the second transmission control member; the steering control input structure can drive one of the first transmission control member and the second transmission control member to rotate around the transmission control rotating shaft thereof, and the other transmission control member is kept static.
Preferably, the control output structure comprises a first slide block, a first control output piece, a second slide block and a second control output piece; the first transmission control rotating shaft penetrates through the upper box cover and is fixedly connected with the first control output piece, and the first sliding block is arranged at the end part, far away from the first transmission control rotating shaft, of the first control output piece; the second transmission control rotating shaft penetrates through the upper box cover to be fixedly connected with the second control output piece, and the second sliding block is arranged at the end part, far away from the second transmission control rotating shaft, of the second control output piece; the transmission assembly comprises a first sliding chute and a second sliding chute, the first sliding block is slidably mounted in the first sliding chute, and the second sliding block is slidably mounted in the second sliding chute; the shift control input structure is capable of driving the first link and the second link to rotate by the same angle about their respective centers, and the first link and the second link rotate in opposite directions; the steering control input structure is capable of driving one of the first runner and the second runner to move in a first direction while keeping the other runner stationary; the sliding block drives the corresponding control output piece to rotate by taking the transmission control rotating shaft as an axis along with the movement of the sliding chute; the first direction is parallel to a connecting line of the axle center of the first transmission control rotating shaft and the axle center of the second transmission control rotating shaft, and a connecting line of the center of the first sliding groove and the center of the second sliding groove is parallel to the first direction.
Preferably, a distance between the first slider and the first transmission control rotating shaft is equal to a distance between the second transmission control member and the second transmission control rotating shaft.
Preferably, the shift control input structure includes a shift spindle, a first coupling member and a second coupling member provided on the shift spindle; the first connecting component is connected with the end part of the first sliding chute, so that the first connecting component can push the first sliding chute to rotate around the center of the first sliding chute in a plane perpendicular to the rotation plane of the speed change rotating shaft when the speed change rotating shaft rotates; the second connecting assembly is connected with the end of the second sliding groove, so that when the variable-speed rotating shaft rotates, the second connecting assembly can push the second sliding groove to rotate around the center of the second sliding groove in a plane perpendicular to the rotating plane of the variable-speed rotating shaft.
Preferably, the first connecting assembly comprises a first connecting seat coaxially arranged outside the variable rotation shaft and capable of rotating synchronously with the variable rotation shaft, and a first connecting rod fixedly arranged on the first connecting seat; the first connecting seat comprises a bulge extending along the radial direction of the variable speed rotating shaft, one end of the first connecting rod is connected to the bulge, and the other end of the first connecting rod is connected to the end part of the first sliding chute; the second connecting assembly comprises a second connecting seat and a second connecting rod, the second connecting seat is coaxially arranged outside the variable-speed rotating shaft and can synchronously rotate with the variable-speed rotating shaft, and the second connecting rod is fixedly arranged on the second connecting seat; the second connecting seat comprises a bulge extending along the radial direction of the variable speed rotating shaft, one end of the second connecting rod is connected to the bulge, and the other end of the second connecting rod is connected to the end part of the second sliding groove.
Preferably, the variable-speed rotating shaft is a spline shaft, the first connecting seat comprises a first spline sleeve matched with the spline shaft, and the second connecting seat comprises a second spline sleeve matched with the spline shaft.
Preferably, the steering control input structure comprises a steering gear, a first slide seat for mounting the first sliding chute, a second slide seat for mounting the sliding chute, and a slide seat control assembly, wherein the center of the first sliding chute is fixed relative to the first slide seat, and the center of the second sliding chute is fixed relative to the second sliding chute; the steering gear is in transmission connection with the carriage control assembly for controlling the first carriage and the second carriage to approach each other along the first direction, and one of the carriages remains stationary during the approach.
Preferably, the slide seat control assembly includes a limiting member and a slide control member, the first slide seat and the second slide seat are slidably mounted on the limiting member, and the steering gear is in transmission connection with the slide control member to control the slide control member to move along the first direction; the slide controls include a first slide control and a second slide control; when the slide control moves in a first direction: the first carriage control is in contact with the first carriage while the second carriage control is separated from the second carriage such that the first carriage moves with the slide control; or the first carriage control is separated from the first carriage while the second carriage control is in contact with the second carriage such that the second carriage moves with the slide control.
Preferably, the slide control includes a rack disposed in the first direction; the steering gear is in transmission connection with the rack; the first sliding seat control part is arranged at one end, close to the first sliding seat, of the rack, and the second sliding seat control part is arranged at one end, close to the second sliding seat, of the rack.
Preferably, the first carriage includes a first slide control for cooperating with the first carriage control, the second carriage includes a second slide control for cooperating with the second carriage control; the first and second slide controls are located between the first and second slide controls.
Preferably, the transmission case further comprises an elastic return structure, and the elastic return structure can enable the first sliding groove and the second sliding groove to be away from each other along the first direction.
Preferably, the elastic return structure comprises a first return seat and a second return seat arranged along the first direction, and an elastic component arranged between the first return seat and the second return seat along the first direction; the first return seat is fixedly connected with the first sliding seat, and the second return seat is fixedly connected with the second sliding seat.
Preferably, the first slider is a cylindrical slider, and the second slider is a cylindrical slider.
Drawings
FIG. 1 is a schematic illustration of the transmission system at rest.
Fig. 2 shows a schematic view of the transmission case in a stationary state.
FIG. 3 is a schematic representation of the transmission in a forward travel state.
FIG. 4 is a schematic view of the transmission in the forward motion state.
FIG. 5 is a schematic diagram of the transmission in the reverse state.
FIG. 6 is a schematic view of the transmission in the reverse state.
FIG. 7 is a schematic view of the transmission system in a cornering situation.
Fig. 8 shows a schematic view of the transmission in a turning situation.
Fig. 9 is a front view of the transmission.
FIG. 10 is a top view of the transmission.
FIG. 11 is a side view of the transmission.
Fig. 12 is a perspective view of the transmission case.
Fig. 13 is a schematic top view of the transmission structure in the transmission case.
Fig. 14 is a schematic side view of the transmission structure in the transmission case.
Fig. 15 is a schematic front view of the transmission structure of the transmission case upper cover.
Detailed Description
Example one
A drive control system for a hydraulically driven tracked harvester is shown in fig. 9-15. The harvester comprises a first motor 1a for driving a first crawler wheel of the harvester, a second motor 1b for driving a second crawler wheel of the harvester, a hydraulic pump 2, an engine 3, a transmission case 4, a variable speed push rod 5 for controlling the harvester to walk forwards and backwards, and a steering wheel operating rod 6 for controlling the harvester to turn.
The hydraulic pump 2 is a duplex hydraulic pump, which is driven by the engine 3 to suck oil from a hydraulic oil tank to form pressure oil which is respectively discharged to the first motor 1a and the second motor 1b in two ways. The hydraulic pump 2 includes a first pump control panel 2a corresponding to the control motor one 1a and a second pump control panel 2b corresponding to the control motor two 1b. The first pump control plate 2a and the second pump control plate 2b are oppositely disposed on the top of the hydraulic pump 2, and one end of each of them is provided with a rotating shaft fixedly connected to the top of the hydraulic pump, so that the two pump control plates can be rotated about the rotating shafts of the respective ends. The two pump control plates control the rotating speed and the rotating direction of the first motor and the second motor through the rotating angles and the rotating directions of the two pump control plates, and the control directions of the two control plates are opposite. For example, the first pump control plate 2a in this embodiment rotates counterclockwise by a certain angle to control the motor to rotate in the forward direction, thereby controlling the first track wheel to rotate forward at a certain speed; the first pump control plate 2a rotates clockwise by a certain angle to control the motor to rotate in reverse direction, so as to control the first crawler wheel to rotate backwards at a certain speed; and the rotating speed of the first motor and the rotating speed of the first crawler wheel are in direct proportion to the rotating angle of the first pump control plate. The second pump control plate 2b rotates clockwise by a certain angle to control the second motor to rotate forward, so that the second crawler wheel is controlled to rotate forward at a certain speed; the second pump control plate 2b rotates anticlockwise by a certain angle to control the motor to rotate reversely, so that the second crawler wheel is controlled to rotate backwards at a certain speed; the rotating speed of the second motor and the rotating speed of the second crawler wheel are in direct proportion to the rotating angle of the second pump control plate.
The transmission case 4 includes a case body formed of an upper case cover 41 and a lower case body 42, and a transmission system provided in the case body. One side of the transmission case is provided with a first input interface 431 for mounting and connecting the speed change push rod 5, the other side of the transmission case is provided with a second input interface 432 for mounting and connecting the steering wheel operating rod 6, and the top of the upper case cover 41 is provided with a first output interface 44a corresponding to the first pump control plate 21 and a second output interface 44b corresponding to the second pump control plate 22. The first output interface 44a is provided with a first transmission control rotating shaft 711a, and the first transmission control rotating shaft 711a is installed in the first output interface 44a through a bearing sleeve sleeved on the middle section of the first transmission control rotating shaft 711a, so that the first transmission control rotating shaft 711a can rotate in the first output interface 44 a. One end of the first transmission control rotating shaft 711a is provided with a first transmission control plate 712a, and the other end of the first transmission control rotating shaft 711a passes through the upper case cover 41 of the transmission case and is connected to the top surface of the end of the first control output plate 722a located in the case. The movable end of the first transmission control plate 712a at the end of the first transmission control rotation shaft 711a is connected to the movable end of the first pump control plate 2a by a rigid first link 8 a. A first slider 721a having a substantially cylindrical shape is disposed on the bottom surface of the other end of the first control output plate 772a, so that the first slider 721a can drive the first transmission control rotating shaft 711a to rotate through the first control output plate 722a, and thus the first transmission control plate 712a at the other end of the first transmission control rotating shaft 711a is driven to rotate around the first transmission control rotating shaft 711a, and further, the first connecting rod 8a is driven to rotate by a certain angle corresponding to the first pump control plate 2a linked therewith. The second output interface 44b is provided with a second transmission control rotating shaft 711b, and the second transmission control rotating shaft 711b is installed in the second output interface 44b through a bearing sleeve sleeved outside the middle section of the second transmission control rotating shaft 711b, so that the second transmission control rotating shaft 711b can rotate in the second output interface 44b. One end of the second transmission control rotating shaft 711b is provided with a second transmission control plate 712b, and the other end of the second transmission control rotating shaft 711b passes through the upper case cover 41 of the transmission case and is connected to the top surface of the end of the second control output plate 722b located in the transmission case. The movable end of the second transmission control plate 712b located at the end of the second transmission control rotation shaft 711b is connected to the movable end of the second pump control plate 2b by a rigid second link 8 b. A second slider 721b having a substantially cylindrical shape is disposed on the bottom surface of the other end of the second control output plate 772a, so that the second slider 721b can drive the second transmission control rotating shaft 711b to rotate through the second control output plate 722b, thereby driving the second transmission control plate 712b at the other end of the second transmission control rotating shaft 711b to rotate around the second transmission control rotating shaft 711b, and further, the second pump control plate 2b linked with the second transmission control rotating shaft 711b via the second connecting rod 8b rotates a certain angle.
Two chutes are arranged in the transmission case 4: a first slide block 721a is slidably installed in the first slide groove 751a, and a second slide block 721b is slidably installed in the second slide groove 751 b. The first and second sliding grooves 751a and 751b are identical in structure and are installed in the transmission case by first and second sliders 741a and 741b, respectively. A limiting member 7421 (a rod-shaped limiting rod in this embodiment) transversely disposed in the transmission case is further disposed in the transmission case 4, and the first sliding seat 741a and the second sliding seat 741b are slidably connected to the limiting member 7421. The limiting member 7421 limits the movement of the two sliders in the transverse direction between the first output interface and the second output interface. The center of the first sliding groove 751a is fixed on the first slide 741a, so that the first sliding groove 751a can rotate around the center thereof; the center of the second slide groove 751b is fixed to the second slide seat 741b so that the second slide groove 751b can rotate about the center thereof.
A shifting rotating shaft 731 parallel to the limiting member 7421 is disposed on one side of the limiting member 7421, and a first connecting seat 7321a and a second connecting seat 7321b are sleeved on the outer circumference of the shifting rotating shaft 731. The outer surface of the speed change rotating shaft 731 is provided with a key groove along the length direction of the speed change rotating shaft, the inner surfaces of the first connecting seat 7321a and the second connecting seat 7321b are also provided with key grooves, and the first connecting seat 7321a and the second connecting seat 7321b sleeved outside the speed change rotating shaft 731 can be matched with a speed change rotating shaft key, so that the first connecting seat and the second connecting seat can not only move along the speed change rotating shaft but also synchronously rotate along with the speed change rotating shaft. A projection 73211a is formed by extending the surface circumference of the first connecting seat 7321a radially outward of the shift rotating shaft 731. The first connecting seat 7321a and the first sliding chute 751a are connected by a rigid first connecting rod 7322a, one end of the first connecting rod 7322a is fixed to the projection 73211a of the first connecting seat 7321a, and the other end of the first connecting rod 7322a is fixed to one side of the end of the first sliding chute 751 a. A projection 73211b is formed by extending a surface circumference of the second connecting seat 7321b outward in the radial direction of the shift rotating shaft 731. The second connecting seat 7321b and the second sliding groove 751b are connected by a rigid second connecting rod 7322b, one end of the second connecting rod 7322b is fixed to the protrusion 73211b of the second connecting seat 7321b, and the other end of the second connecting rod 7322b is fixed to one side of the end of the second sliding groove 751 b. The connection between the first connecting rod 7322a and the first sliding groove 751a and the connection between the second connecting rod 7322b and the second sliding groove 751b are both the outside of the two sliding grooves or both the inside of the two sliding grooves. The variable-speed push rod 5 is in transmission connection with the variable-speed rotating shaft through the first control input port, drives the variable-speed rotating shaft to rotate through the variable-speed push rod, and simultaneously pushes the first sliding groove and the second sliding groove along with the connecting rods on the first connecting seat and the second connecting seat which synchronously rotate along with the variable-speed rotating shaft, so that the first sliding groove and the second sliding groove rotate by the same angle in opposite directions at respective centers.
The other side of the limiting member 7421 is provided with a sliding control member 7422, and the sliding control member 7422 is slidably disposed along a direction parallel to the speed-changing rotation axis. A rack parallel to the shift rotation shaft is provided on the side of the slide controller opposite to the stopper 7421, and a first slider controller 74221a and a second slider controller 74221b are provided on both ends of the slide controller 7422 opposite to the stopper 7421. The rack is connected to the steering wheel operating lever 6 for sliding control via the steering gear 743, the steering wheel operating lever 6 drives the rotation gear 743 to rotate, and the rack of the sliding control member 7422 is driven to rotate by the rotation gear 743, so that the sliding control member 7422 moves in a direction parallel to the shift rotation axis, further resulting in movement of the first slider control member 74221a and the second slider control member 74221b on the sliding control member 7422. The first slide 741a is provided with a first slide control 7411a for cooperation with the first slide control 74221a and the second slide 741b is provided with a second slide control 7411b for cooperation with the second slide control 74221b. When the slide control member 7422 is moved to one side in the length direction of the rack by the steering wheel lever, the first slide control member 74221a on the slide control member 7422 contacts the first slide control member 7411a while keeping the second slide control member 74221b separated from the second slide control member 7411b, so that the first slide 741a moves along with the slide control member 7422 while the second slide 741b remains stationary; when the slide-control member 7422 is moved by the steering wheel lever toward the other side in the lengthwise direction of the rack, the second slide-control member 74221b on the slide-control member 7422 comes into contact with the second slide-control member 7411b while keeping the first slide-control member 74221a separated from the first slide-control member 7411a, so that the second slide 741a moves along with the slide-control member 7422 while the first slide 741a remains stationary.
In this embodiment, the drive train is shown in fig. 1 when the harvester is at rest, and the state in the drive box is shown in fig. 2. The first and second carriages 741a and 741b are respectively disposed at both ends of the shifting rotary shaft 731, and the first and second chutes 751a and 751b are parallel to the shifting rotary shaft 731. An extension line of the first driving control rotating shaft 711a passes through the center of the first sliding groove 751a, and an extension line of the second driving control rotating shaft 711b passes through the center of the second sliding groove 751 b.
The variable-speed push rod 5 is in transmission connection with the variable-speed rotating shaft through the first control input port, drives the variable-speed rotating shaft to rotate through the variable-speed push rod, and simultaneously pushes the first sliding groove and the second sliding groove along with the connecting rods on the first connecting seat and the second connecting seat which synchronously rotate along with the variable-speed rotating shaft, so that the first sliding groove and the second sliding groove rotate by the same angle in opposite directions at respective centers. So that the harvester starts to walk forwards and backwards, the transmission system is shown in figures 3 and 4, and the body in the transmission box is shown in figures 5 and 6.
When the harvester needs to turn during walking, the sliding control piece is driven to move through the steering wheel operating rod 6, one sliding seat is driven to be close to the other sliding seat, and meanwhile, the connecting seat connected with the moving sliding seat is synchronously moved along the variable-speed rotating shaft of the sliding seat along with the movement of the sliding seat. The driver does not operate the speed change push rod 5 in the turning process, and the inclination angles of the first sliding groove and the second sliding groove can be kept unchanged when the connecting seat moves along the speed change rotating shaft. Therefore, as shown in fig. 8, the length directions of the first sliding chute and the second sliding chute during walking are not parallel to the moving direction of the sliding seat, and an included angle a is kept. As the first and second chutes 751a and 751b approach each other, the first and second chutes 751a and 751b in this embodiment are described as an example, and the distance between the first transmission control shaft 711a and the first chute 751 (the center of the first chute) changes. During the movement of the first sliding chute 751a, the first slide 721a in the first sliding chute 751a will move along the first sliding chute to adjust to the new position of the first sliding chute. And the moving track of the first slider 721a connected to the first transmission control shaft 711a through the first transmission control plate 712a is limited to a circle of a fixed radius centered on the first transmission control shaft 711a, thereby causing the first slider 721a to rotate about the first transmission control plate 712a, thereby changing the angle of the first pump control plate (see fig. 7) and varying the rotation speed of the first motor. In the whole process, the position and the angle of the second sliding groove are not changed, so that the second pump control plate still keeps the original angle, and the second motor keeps the original rotating state. Therefore, the first motor and the second motor have a rotation speed difference to realize turning.
In this embodiment, a return spring 761 is disposed between the outer circumference of the shift rotating shaft 731 and the first and second connection seats 7321a and 7321b. When the turning is finished, the driving force exerted by the steering wheel operating lever disappears, and the first sliding seat which is originally close to the second sliding seat can be far away from the second sliding seat and return to the end part of the speed change rotating shaft again under the action of the return spring. In the process, the angle a between the first sliding chute and the moving direction is still kept due to the existence of the first connecting seat. So that the angle of the first pump control plate returns to the angle before the turn. Therefore, the harvester is enabled to continue to run according to the running speed before turning after the turning is finished.
The above examples are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solution should be made by those skilled in the art without departing from the design concept of the present invention, and the technical content of the present claims is fully described in the claims.
Claims (12)
1. A transmission case, its characterized in that: the transmission mechanism comprises a box body consisting of an upper box cover and a lower box body, a first transmission control structure and a second transmission control structure which are arranged on the upper box cover, and a control output structure, a variable speed control input structure, a steering control input structure and a transmission assembly which are arranged in the box body; the transmission assembly is in transmission connection with the speed change control input structure and the control output structure, and is in transmission connection with the steering control input structure and the control output structure; the first transmission control structure comprises a first transmission control part and a first transmission control rotating shaft arranged at the end part of the first transmission control part, and the second transmission control structure comprises a second transmission control part and a second transmission control rotating shaft arranged at the end part of the second transmission control part; the transmission control input structure is capable of driving the first transmission control member and the second transmission control member to rotate by the same angle about their respective transmission control axes, and the first transmission control member rotates in a direction opposite to that of the second transmission control member; the steering control input structure can drive one of the first transmission control member and the second transmission control member to rotate around the transmission control rotating shaft thereof, and keep the other transmission control member static; the control output structure comprises a first sliding block, a first control output piece, a second sliding block and a second control output piece; the first transmission control rotating shaft penetrates through the upper box cover to be fixedly connected with the first control output piece, and the first sliding block is arranged at the end part, far away from the first transmission control rotating shaft, of the first control output piece; the second transmission control rotating shaft penetrates through the upper box cover and is fixedly connected with the second control output piece, and the second sliding block is arranged at the end part, far away from the second transmission control rotating shaft, of the second control output piece; the transmission assembly comprises a first sliding groove and a second sliding groove, the first sliding block is slidably mounted in the first sliding groove, and the second sliding block is slidably mounted in the second sliding groove; the shift control input structure is capable of driving the first link and the second link to rotate by the same angle about their respective centers, and the first link and the second link rotate in opposite directions; the steering control input structure is capable of driving one of the first and second chutes to move in a first direction while keeping the other chute stationary; the sliding block drives the corresponding control output piece to rotate by taking the transmission control rotating shaft as an axis along with the movement of the sliding chute; the first direction is parallel to a connecting line of the axle center of the first transmission control rotating shaft and the axle center of the second transmission control rotating shaft, and a connecting line of the center of the first sliding groove and the center of the second sliding groove is parallel to the first direction.
2. A gear box according to claim 1, wherein: the distance between the first sliding block and the first transmission control rotating shaft is equal to the distance between the second transmission control piece and the second transmission control rotating shaft.
3. A gear box according to claim 2, wherein: the speed change control input structure comprises a speed change rotating shaft, a first connecting assembly and a second connecting assembly, wherein the first connecting assembly and the second connecting assembly are arranged on the speed change rotating shaft; the first connecting assembly is connected with the end part of the first sliding chute, so that when the variable speed rotating shaft rotates, the first connecting assembly can push the first sliding chute to rotate around the center of the first sliding chute in a plane perpendicular to a rotating plane of the variable speed rotating shaft; the second connecting assembly is connected with the end of the second sliding groove, so that when the variable-speed rotating shaft rotates, the second connecting assembly can push the second sliding groove to rotate around the center of the second sliding groove in a plane perpendicular to the rotating plane of the variable-speed rotating shaft.
4. A gear box according to claim 3, wherein: the first connecting assembly comprises a first connecting seat and a first connecting rod, wherein the first connecting seat is coaxially arranged outside the variable-speed rotating shaft and can synchronously rotate with the variable-speed rotating shaft; the first connecting seat comprises a bulge extending along the radial direction of the variable-speed rotating shaft, one end of the first connecting rod is connected to the bulge, and the other end of the first connecting rod is connected to the end part of the first sliding groove; the second connecting assembly comprises a second connecting seat and a second connecting rod, the second connecting seat is coaxially arranged outside the speed change rotating shaft and can synchronously rotate with the speed change rotating shaft, and the second connecting rod is fixedly arranged on the second connecting seat; the second connecting seat comprises a bulge extending along the radial direction of the variable speed rotating shaft, one end of the second connecting rod is connected to the bulge, and the other end of the second connecting rod is connected to the end part of the second sliding groove.
5. A gear box according to claim 4, wherein: the variable speed pivot is the integral key shaft, first connecting seat including be used for with integral key shaft complex first spline housing, the second connecting seat including be used for with integral key shaft complex second spline housing.
6. A gear box according to claim 1, wherein: the steering control input structure comprises a steering gear, a first sliding seat used for mounting the first sliding groove, a second sliding seat used for mounting the sliding groove and a sliding seat control assembly, wherein the center of the first sliding groove is fixed relative to the first sliding seat, and the center of the second sliding groove is fixed relative to the second sliding groove; the steering gear is in transmission connection with the slide control assembly for controlling the first slide and the second slide to approach each other in the first direction, and one of the slides remains stationary during the approach.
7. A gear box according to claim 6, characterised in that: the sliding seat control assembly comprises a limiting piece and a sliding control piece, the first sliding seat and the second sliding seat are slidably mounted on the limiting piece, and the steering gear is in transmission connection with the sliding control piece and is used for controlling the sliding control piece to move along the first direction; the slide controls include a first slide control and a second slide control; when the slide control moves in a first direction: the first carriage control is in contact with the first carriage while the second carriage control is separated from the second carriage such that the first carriage moves with the slide control; or the first carriage control member is separated from the first carriage while the second carriage control member is in contact with the second carriage, such that the second carriage moves with the slide control member.
8. A gear box according to claim 7, wherein: the sliding control member comprises a rack arranged along the first direction; the steering gear is in transmission connection with the rack; the first sliding seat control part is arranged at one end, close to the first sliding seat, of the rack, and the second sliding seat control part is arranged at one end, close to the second sliding seat, of the rack.
9. A gear box according to claim 8, wherein: the first carriage includes a first slide control for cooperating with the first carriage control, the second carriage includes a second slide control for cooperating with the second carriage control; the first and second slide controls are located between the first and second slide controls.
10. A gear box according to claim 6, wherein: the transmission case still includes elasticity return structure, elasticity return structure can make first spout with the second spout is followed first direction is kept away from each other.
11. A gear box according to claim 10, wherein: the elastic return structure comprises a first return seat and a second return seat which are arranged along the first direction, and an elastic component which is arranged between the first return seat and the second return seat along the first direction; the first return seat is fixedly connected with the first sliding seat, and the second return seat is fixedly connected with the second sliding seat.
12. A gear box according to claim 1, wherein: the first sliding block is a cylindrical sliding block, and the second sliding block is a cylindrical sliding block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710197140.6A CN106900284B (en) | 2017-03-29 | 2017-03-29 | Transmission case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710197140.6A CN106900284B (en) | 2017-03-29 | 2017-03-29 | Transmission case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106900284A CN106900284A (en) | 2017-06-30 |
| CN106900284B true CN106900284B (en) | 2022-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710197140.6A Active CN106900284B (en) | 2017-03-29 | 2017-03-29 | Transmission case |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108036029B (en) * | 2017-12-05 | 2020-10-09 | 上海航天精密机械研究所 | Multi-output-shaft gearbox based on electric clutch |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4438112B2 (en) * | 1998-11-10 | 2010-03-24 | 株式会社 神崎高級工機製作所 | Combine transmission |
| DE10121015A1 (en) * | 2001-04-28 | 2002-10-31 | Deere & Co | drive system |
| US9845857B2 (en) * | 2013-09-27 | 2017-12-19 | Kubota Corporation | Combine |
| CN203661633U (en) * | 2013-12-27 | 2014-06-25 | 江苏大学 | Differential mechanism type track combine-harvester gearbox |
| CN104343935B (en) * | 2014-10-09 | 2017-02-22 | 浙江云洲科技有限公司 | Stepless transmission box of caterpillar tractor |
| CN207185258U (en) * | 2017-03-29 | 2018-04-06 | 星光农机股份有限公司 | Transmission case |
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