Clutch control device and harvester

Abstract

A clutch control device comprises a gearbox shell, a mechanical transmission assembly and a control arm, and the mechanical transmission assembly comprises a small gear, a gear disc, a transmission cam and a rotating shaft; the gear disc comprises a tooth-shaped edge and an arc edge, the arc edge is the same as the arc of the transmission cam, and the tooth-shaped edge is meshed with the pinion; the gear disc and the transmission cam are arranged in parallel, and parts with the same circular arc are staggered by a certain included angle and are respectively fixed on the rotating shaft; the two ends of the rotating shaft are fixed to installation positions on the two sides of the gearbox shell respectively. The control arm comprises a first control arm and a second control arm which are parallel to each other and are respectively arranged corresponding to the transmission cam and the gear disc; one end of the control arm is rotatably connected with the gearbox shell, and the other end of the control arm is connected with the clutch device.

Description

Technical Field

[0002] The invention relates to the technical field of mechanical transmission, and in particular to a clutch control device and a harvester using the clutch device. Background Art

[0003] In the prior art, in the clutch control of the threshing drum, the driver operates the threshing handle or pull rod to make the tensioning wheel tighten / relax the transmission belt, transmit the power of the engine to the threshing drum or cut off the power transmission of the threshing drum. In the harvesting clutch control of the cutting table part, when the driver pulls the handle or pull rod, the connecting rod mechanism will drive the relevant connecting parts to change the power input device of the cutting table (such as the connection state between the pulley and the belt), thereby realizing the connection or disconnection of the power of the cutting table. This method has a relatively simple structure, but requires greater strength during operation, and the stroke and strength of the pull rod need to be accurately controlled by the driver to ensure accurate control of the clutch. In addition, the independent clutch control device operated by the independent handle / pull rod has deficiencies in accuracy and stability, and a more efficient and reliable clutch control device is needed. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a clutch control device to solve the problems of complex operation and low efficiency in the engagement and separation process of the clutch in the prior art; the present invention also provides a harvester that uses the above-mentioned clutch control device to control the engagement / separation of the threshing clutch and the harvesting clutch, so as to achieve precise control of the threshing clutch and the harvesting clutch of the harvester and improve operating efficiency.

[0005] Specifically, a clutch control device includes a gear box housing, a mechanical transmission component, and a control arm. The mechanical transmission assembly includes a pinion, a gear plate, a transmission cam, and a rotating shaft; The gear plate comprises a toothed edge and an arc edge, the arc edge is the same as the arc of the transmission cam, and the toothed edge meshes with the pinion gear; The gear plate and the transmission cam are arranged parallel to each other, and the parts with the same arc are staggered at a certain angle and fixed to the rotating shaft respectively; the two ends of the rotating shaft are fixed to the mounting positions on both sides of the gear box housing respectively; The control arm comprises a first control arm and a second control arm, which are parallel to each other and respectively arranged corresponding to the transmission cam and the gear plate; one end of the control arm is rotatably connected to the gear box housing, and the other end is respectively connected to the clutch device.

[0006] The motor drives the pinion shaft to rotate, the pinion rotates synchronously, the gear plate meshing with the pinion rotates, the rotating shaft and the transmission cam rotate synchronously, and the first control arm and the second control arm are respectively squeezed and pushed by the transmission cam and the gear plate to rotate in opposite directions.

[0007] When the gear plate rotates clockwise from the initial position, the transmission cam first pushes the first control arm to rotate, and then the arc edge of the gear plate pushes the second control arm to rotate. When the gear plate moves clockwise to the limit position and rotates counterclockwise, the shaft and the transmission cam rotate counterclockwise synchronously, and the second control arm returns first, and then the first control arm returns.

[0008] Alternatively, the relative installation angle of the gear plate and the transmission cam is changed, that is, the staggered angle of the same arc parts is changed, so that when the gear plate rotates clockwise, the arc edge of the gear plate pushes the second control arm; when the gear plate rotates counterclockwise, the transmission cam pushes the first control arm.

[0009] Furthermore, the gear plate is also provided with a mechanical limiter to limit the maximum angle of clockwise and counterclockwise rotation of the gear plate, thereby providing safety protection for the clutch control device when the electronic control device fails.

[0010] In a first improvement, the rotating shaft is connected to the bearing and fixed to the mounting position on the side of the gear box housing.

[0011] Furthermore, a motor and / or sensor mounting position is also provided on the side of the gear box housing.

[0012] Preferably, the control arms are connected to the clutches through flexible shafts, and the flexible shafts are pulled by the control arms to engage or disengage the clutch device from the power source.

[0013] In a second aspect, the harvester provided by the present invention adopts a clutch control device and uses the following technical scheme: The harvester includes threshing clutch, harvesting clutch, The first control arm and the second control arm of the clutch control device are connected with the threshing clutch and the harvesting clutch respectively through flexible shafts.

[0014] During use, when the clutch device needs to be combined with the engine power, an electrical signal is given to the control device through the handle, the small gear rotates, the gear plate rotates clockwise, the rotating shaft and the transmission cam rotate at the same time, the first control arm and the second control arm pull the soft shaft in turn to tension it, the threshing tensioning wheel and the harvesting tensioning wheel press the corresponding belts in turn, and the threshing power and the harvesting power are connected in turn.

[0015] Similarly, when the clutch device needs to be separated from the engine power, the pinion shaft is controlled to rotate through an electrical signal, the gear plate rotates counterclockwise, the second control arm and the first control arm return to their positions in turn, the flexible shaft relaxes, the harvesting clutch and the threshing clutch are separated in turn, and the harvesting power and the threshing power are cut off in turn.

[0016] The present invention has at least the following beneficial effects: The structure is simple, the operation is convenient and comfortable, and through the structural design of the gear plate and the transmission cam and the relative installation position, single-handle operation can achieve precise control of the harvester's threshing clutch and harvesting clutch, thereby improving the efficiency of the clutch control.

[0017] The gear plate is designed with mechanical limit to improve the safety and reliability of the device.

[0018] The gearbox housing is made of aluminum alloy tube material, which is light in weight, high in strength and good in corrosion resistance, effectively reducing the weight of the entire clutch control device and extending the service life of the gearbox housing.

[0019] The clutch control device is equipped with a motor installation position and a sensor monitoring position. Combined with the control strategy, when the harvesting / threshing clutch is engaged, the engine speed is automatically adjusted to reduce abnormal belt wear and improve overall durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 1-gearbox housing, 2-mechanical transmission assembly, 29-rotating shaft, 28-gear plate, 27-transmission cam, 3-control arm, 26-pinion, 5-flexible shaft.

[0021] Figure 1 , is a schematic diagram of the overall structure of the harvester clutch control device; Figure 2 , is an exploded schematic diagram of the overall structure of the harvester clutch control device; Figure 3 , is a schematic diagram of the gear plate and transmission cam status of an embodiment of a harvester clutch control device. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The words "first", "second" and similar words used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish the relationship between multiple identical components and other different components; the terms "installed", "connected" and "connected" in the present invention should be understood in a broad sense; words such as "clockwise" and "counterclockwise" indicating orientation or positional relationship are only for the convenience of describing the present invention, and do not mean that the components must have a specific orientation or be constructed in a specific orientation.

[0023] Combination Figure 1-3A clutch control device includes a gearbox housing 1, a mechanical transmission component 2, and a control arm 3. The mechanical transmission component includes a rotating shaft 29, a gear plate 28, a transmission cam 27, and a pinion 26. The gear plate and the transmission cam are fan-shaped as a whole. The gear plate includes a toothed edge and an arc edge. The arc edge is the same as the arc of the transmission cam. The gear plate and the transmission cam are arranged in parallel with each other, and the parts with the same arc are staggered at a certain angle and fixed to the rotating shaft. The electric drive pinion shaft rotates, and the pinion rotates synchronously. When the gear plate meshing with the pinion rotates clockwise from the initial position, the rotating shaft and the transmission cam rotate synchronously. The transmission cam first contacts and squeezes the corresponding first control arm, and then the arc edge of the gear plate contacts and squeezes the corresponding second control arm. After the gear plate rotates clockwise to the limit position, when it rotates counterclockwise, the gear plate first leaves the second control arm, and the second control arm returns first; the transmission cam then leaves the first control arm, and the first control arm returns later.

[0024] The first control arm 3 and the second control arm 3 are parallel to each other and are respectively arranged corresponding to the transmission cam and the gear plate. One end of the control arm is rotatably connected to the gear box housing, and the other end is respectively connected to the clutch device through a flexible shaft. The first control arm and the second control arm are respectively pushed by the transmission cam and the gear plate to rotate in opposite directions, and the control arm pulls the flexible shaft to connect or separate the clutch device with the power source.

[0025] In one embodiment, the side of the gearbox housing is also provided with a motor and / or sensor installation position, which controls the rotation angle of the pinion through an electrical signal, thereby controlling the operating angle of the gear plate. The sensor is installed to monitor whether the mechanical operation is normal and protect the control device.

[0026] In one embodiment, the gear plate is further provided with a mechanical limiter, which mechanically limits the maximum angle of clockwise and counterclockwise rotation of the gear plate, thereby providing safety protection for the clutch control device when the electronic control device fails.

[0027] During use, the gear plate is in the initial position. When the motor drives the pinion to rotate counterclockwise, the gear plate meshing with it rotates clockwise. Because the parts of the gear plate and the transmission cam with the same arc are installed at a certain angle, the transmission cam pushes the first control arm first, and then the arc edge of the gear plate pushes the second control arm, thereby tightening the corresponding flexible shafts and realizing the sequential engagement of the clutch devices.

[0028] Similarly, after the gear plate rotates clockwise to the limit position, when the pinion rotates clockwise and the gear plate rotates counterclockwise, the rotating shaft and the transmission cam rotate counterclockwise accordingly, the second control arm returns first and the first control arm returns later, thereby relaxing the corresponding flexible shafts and realizing the sequential separation of the clutch devices.

[0029] The clutch control device provided by the present invention can drive the mechanical transmission components to rotate sequentially through electrical signals, and can be used in a control system with logical requirements for sequential actions in conjunction with a control strategy, with high efficiency, simplicity and reliability.

[0030] In addition, for systems without sequential control logic, the clutch control device provided by the present invention can also be used to independently control and change the relative installation angle of the gear plate and the transmission cam, that is, change the staggered angle of the same arc parts, so that when the gear plate rotates clockwise, the arc edge of the gear plate pushes the second control arm; when the gear plate rotates counterclockwise, the transmission cam pushes the first control arm. The corresponding clutch device is pulled by the control arm to make the corresponding clutch engage or disengage. For example, the clutch device is used to control the lifting action and / or parking action of the tractor.

[0031] For a control system with only a single clutch, the clutch control device provided by the present invention can also be used for independent control, for example, only a single gear plate and / or transmission cam, and a single control arm are used to control the engagement / disengagement of the grain unloading clutch or the reel clutch. Without departing from the core content of the present invention, the deformation made by changing the relative installation angle of the gear plate and the transmission cam all falls within the protection scope of the present invention.

[0032] In a second aspect, the present invention provides a harvester, which adopts the clutch control device described above and uses the following technical scheme: The harvester includes a threshing clutch and a harvesting clutch; The first control arm and the second control arm of the clutch control device are connected with the threshing clutch and the harvesting clutch respectively through flexible shafts.

[0033] During use, when the clutch device needs to be combined with the engine power, the controller is initialized, so that the handle and the clutch device return to the initial state, the handle sends an electrical signal to the control device, the motor drives the pinion shaft to rotate, the pinion rotates, the gear plate rotates clockwise from the initial position, the rotating shaft and the transmission cam rotate at the same time, the first control arm and the second control arm pull the soft shaft in turn to tension it, the threshing tensioning wheel and the harvesting tensioning wheel press the belt in turn, the threshing power and the harvesting power are connected in turn, and the logical operation sequence of threshing and harvesting can be controlled by electronic control through a single handle combined with a control system, thereby improving the degree of automation and improving agricultural operation efficiency.

[0034] Similarly, when the clutch device needs to be separated from the engine power, the pinion is driven to rotate by an electrical signal, the gear plate rotates counterclockwise, the second control arm and the first control arm return to their positions in turn, the flexible shaft relaxes, the harvesting clutch and the threshing clutch are separated in turn, and the harvesting power and the threshing power are cut off in turn.

[0035] The following introduces the four states of the clutch control device during the threshing and harvesting operations of the harvester.

[0036] Initial state: the gear plate and transmission cam are separated from the control arm, the corresponding flexible shaft is loose, the threshing clutch is separated from the engine power, and the harvester clutch is separated from the power source.

[0037] First state: the first control arm rotates, and the threshing clutch is engaged. The control device receives an electrical signal, drives the pinion shaft to rotate, and the gear plate meshing with the pinion rotates clockwise, the rotating shaft and the transmission cam rotate synchronously, the transmission cam gradually contacts and squeezes the first control arm to push the first control arm to rotate in the opposite direction and gradually rotate to the maximum angle, the transmission cam moves from the first position to the second position, the flexible shaft connected to the control arm pulls the threshing tensioning wheel, the transmission belt is tightened, and gradually combines with the engine power to a stable state, during which the arc edge of the gear plate gradually approaches the second control arm.

[0038] Second state: The second control arm rotates and the harvesting clutch is engaged. The pinion continues to rotate in the same direction, the arc edge of the gear plate contacts the second control arm and squeezes and pushes the second control arm to rotate in the opposite direction, the gear plate gradually rotates clockwise to the maximum angle position, the second control arm gradually rotates to the maximum angle, the flexible shaft connected to the control arm pulls the harvesting clutch, the transmission belt is tightened, and the harvesting power is gradually engaged to a stable state. In this process, the transmission cam rotates from the second position to the third position, the first control arm is supported by the transmission cam, and the angle of the first control arm remains unchanged at the maximum position.

[0039] The third state: the second control arm returns to its position, and the harvesting clutch is disengaged. The control device receives an electrical signal, drives the pinion to rotate clockwise, and the gear plate to rotate counterclockwise. The arc edge of the gear plate gradually separates from the second control arm, the second control arm returns to its position, the transmission belt relaxes, and the harvesting power is gradually cut off. In this process, the transmission cam rotates from the third position to the second position, the first control arm is supported by the transmission cam, the angle of the first control arm remains unchanged at the maximum position, and the threshing power is still in a connected state.

[0040] Fourth state: the first control arm returns to its original position, and the threshing clutch is disengaged. The gear plate continues to rotate counterclockwise and gradually returns to the initial state, and the rotating shaft and the transmission cam rotate synchronously. During this process, the transmission cam rotates from the second position to the first position, and the transmission cam and the first control arm gradually separate and return to the initial state. The flexible shaft relaxes, the corresponding transmission belt relaxes, and the threshing power is cut off.

[0041] The present invention provides a harvester, comprising the control device described in the first aspect, which drives the small gear shaft to rotate by receiving an electrical signal, thereby driving the large gear plate meshing therewith to rotate clockwise or counterclockwise. When the gear plate rotates, the transmission cam first contacts with the first control arm and then separates, and the gearless edge of the gear plate contacts with the second control arm and then separates, thereby achieving threshing before harvesting. When the clutch is separated, harvesting is stopped first and threshing is stopped later, thereby avoiding clogging and jamming of the harvester. The present invention has a simple structure and is easy to operate, and can achieve precise control of the threshing clutch and harvesting clutch of the harvester, thereby improving agricultural operation efficiency.

Claims

1. A clutch control device, characterized in that: Including gearbox housing, mechanical transmission components, control arm, The mechanical transmission assembly includes a pinion, a gear plate, a transmission cam, and a rotating shaft; The gear plate comprises a toothed edge and an arc edge, the arc edge is the same as the arc of the transmission cam, and the toothed edge meshes with the pinion gear; The gear plate and the transmission cam are arranged parallel to each other, and the parts with the same arc are staggered at a certain angle and fixed to the rotating shaft respectively; the two ends of the rotating shaft are fixed to the mounting positions on both sides of the gear box housing respectively; The control arm comprises a first control arm and a second control arm, which are parallel to each other and respectively arranged corresponding to the transmission cam and the gear plate; one end of the control arm is rotatably connected to the gear box housing, and the other end is respectively connected to the clutch device.

2. The clutch control device according to claim 1, characterized in that: The gear plate is also provided with a mechanical limiter to limit the maximum angle of the gear plate to rotate clockwise and counterclockwise.

3. The clutch control device according to claim 1, characterized in that: The side of the gear box housing is also provided with a motor and / or sensor mounting position.

4. The clutch control device according to claim 1, characterized in that: The control arms are connected to the clutches respectively through flexible shafts.

5. The clutch control device according to claim 1, characterized in that: When the gear plate rotates clockwise, the transmission cam pushes the first control arm first, and then the gear plate pushes the second control arm.

6. The clutch control device according to claim 1, characterized in that: When the gear plate rotates counterclockwise, the rotating shaft and the transmission cam rotate counterclockwise synchronously, and the second control arm returns first, and the first control arm returns later.

7. The clutch control device according to claim 1, characterized in that: Alternatively, when the gear plate rotates clockwise, the gear plate pushes the second control arm to rotate; when the gear plate rotates counterclockwise, the transmission cam pushes the first control arm.

8. A harvester, characterized in that: Including, threshing clutch, harvesting clutch, clutch control device as described in any one of claims 1-6; The first control arm and the second control arm of the clutch control device are connected with the threshing clutch and the harvesting clutch respectively through flexible shafts.

9. The harvester according to claim 8, characterized in that: When the gear plate of the clutch control device rotates clockwise, the flexible shaft is tensioned in sequence, the threshing tensioning wheel and the harvesting tensioning wheel press the corresponding belts in sequence, and the threshing power and the harvesting power are connected in sequence.

10. The harvester according to claim 8, characterized in that: When the gear plate of the clutch control device rotates counterclockwise, the flexible shafts are relaxed in sequence, the harvesting tension wheel and the threshing tension wheel leave the corresponding belts in sequence, and the harvesting power and the threshing power are cut off in sequence.

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