Bridge reversal mechanism and combine harvester

Abstract

A bridge reversal mechanism, comprising a frame and a bridge drive shaft (1), the bridge drive shaft (1) being rotatably mounted on the frame. The bridge reversal mechanism further comprises a support (2), a driving wheel (3), a driven wheel (4), a belt (5), a driving mechanism and an engagement and disengagement operating assembly, the driven wheel (4) being fixedly connected to the bridge drive shaft (1), the driving mechanism being fixed onto the support (2), the driving mechanism being drivingly connected to the driving wheel (3), the belt (5) being sleeved onto the driving wheel (3) and the driven wheel (4), the engagement and disengagement operating assembly being installed on the frame, and the engagement and disengagement operating assembly being drivingly connected to the support (2) to drive the support (2) to move to be away from or close to the bridge drive shaft (1), so as to tension or slacken the belt (5). The engagement and disengagement operating assembly manipulates movement of the support to change the center distance between the driving wheel (3) and the driven wheel (4), so as to control the belt (5) to be tensioned or slackened, thus implementing power engagement and disengagement; tensioning pulleys are not needed and there is no need to acquire power from a drive box, thus allowing for arrangement on both longitudinal axial flow and transverse axial flow models. Further disclosed is a combine harvester comprising the described bridge reversal mechanism.

Description

Bridge reversing mechanism and combine harvester Technical Field

[0001] The utility model relates to the field of agricultural machinery, in particular to a bridge reversing mechanism and a combine harvester. Background Art

[0002] For harvesters, if the bridge or cutting platform is blocked, it is necessary to reverse the bridge drive shaft, thereby driving other related components to reverse, so as to facilitate the clearing of the blockage.

[0003] Currently, only longitudinal-axis harvesters have a bridge reversal mechanism. This mechanism uses a reversing drive shaft attached to the drum transmission case. A bridge reversal drive wheel is mounted on the reversing drive shaft. The reversing drive wheel is driven by a belt and a tensioner is attached to the belt drive shaft. A handle controls the tensioner's position, tightening or loosening the belt to achieve the mechanism's clutching function. Transverse-axis harvesters, however, lack a drum transmission case and currently lack a bridge reversal mechanism.

[0004] The existing bridge reversing mechanism needs to draw power from the transmission box and can only be applied to longitudinal axial flow harvesters, which has great limitations in use.

[0005] Utility Model Content

[0006] The technical problem to be solved by the utility model is how to drive the cross-bridge transmission shaft to reverse direction.

[0007] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a bridge reversing mechanism, comprising a frame and a bridge transmission shaft, the bridge transmission shaft being rotatably mounted on the frame, and further comprising a support, a driving wheel, a passive wheel, a belt, a driving mechanism and a clutch operating assembly, the passive wheel being fixedly connected to the bridge transmission shaft, the driving mechanism being fixed on the support, the driving mechanism being transmission connected to the driving wheel, the belt being sleeved on the driving wheel and the passive wheel, the clutch operating assembly being mounted on the frame, the clutch operating assembly being transmission connected to the support, and driving the support to move away from or close to the bridge transmission shaft to tighten or loosen the belt.

[0008] The beneficial effects of this utility model are as follows: the bridge reversing mechanism uses a drive mechanism to provide power and drive the bridge drive shaft in reverse. The clutch operating assembly manipulates the support to move the drive wheel and drive mechanism, thereby changing the center distance between the drive wheel and the driven wheel, thereby controlling the tension and slack of the belt and achieving power clutching. This bridge reversing mechanism eliminates the need for a tensioning pulley and does not require power to be drawn from the transmission case. It can be deployed on both longitudinal and transverse flow models.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the bridge reversing mechanism also includes a support shaft, which is fixedly connected to the frame, one end of the support is hinged to the support shaft, and the clutch operating assembly is transmission-connected to the other end of the support.

[0011] The beneficial effect of adopting the above further solution is that the clutch operating assembly drives the support to rotate around the support rotation axis, the driving force required by the clutch operating assembly is relatively small, and manual operation is convenient.

[0012] Furthermore, the clutch operating assembly includes a handle, a middle portion of the handle is hinged to the frame, and one end of the handle is transmission-connected to the support.

[0013] Furthermore, the clutch operating assembly also includes a torsion spring and a handle shaft, the handle shaft is fixedly connected to the frame, the middle part of the handle is hinged to the handle shaft, the torsion spring is sleeved on the handle shaft, and its two ends are respectively in contact with the handle and the frame.

[0014] The beneficial effect of adopting the above further solution is that the elastic force of the torsion spring can reset the handle, so that when the handle is in the reset state, the driving wheel and the driven wheel are in a disengaged state.

[0015] Furthermore, the clutch operating assembly further includes a limiting rod, which is fixedly connected to the frame and is used to limit the rotation range of the handle.

[0016] The beneficial effect of adopting the above further solution is that the limit rod limits the rotation range of the handle, thereby preventing the handle from rotating too widely during manual operation.

[0017] Furthermore, the bridge reversing mechanism further includes a cutting platform clutch control switch, and the cutting platform clutch control switch is transmission-connected to the handle.

[0018] The beneficial effect of adopting the above further solution is that the header clutch control switch is connected to the handle in a transmission manner. When the handle is rotated to make the driving wheel and the driven wheel in a closed state, the handle simultaneously drives the header clutch control switch to make the header clutch in a closed state.

[0019] Furthermore, the clutch operating assembly also includes a first pull rod, a rocker arm and a second pull rod, one end of the first pull rod is hinged to one end of the handle, the other end of the first pull rod is hinged to one end of the rocker arm, the other end of the rocker arm is hinged to one end of the second pull rod, the other end of the second pull rod is hinged to the support, and the middle part of the rocker arm is hinged to the frame.

[0020] The beneficial effect of adopting the above further solution is that the handle drives the support to move through the first pull rod, the rocker arm and the second pull rod.

[0021] Furthermore, the driving mechanism is a hydraulic motor or an electric motor.

[0022] The utility model also provides a combine harvester, comprising the bridge reversing mechanism.

[0023] Furthermore, the combine harvester also includes a bridge mechanism and an operating platform fixed on the frame at laterally intervals, the bridge transmission shaft is in transmission connection with the bridge mechanism, and the clutch operating assembly is located between the bridge mechanism and the operating platform.

[0024] The beneficial effect of adopting the above further solution is that the clutch operating assembly is located between the bridge mechanism and the operating platform, which is convenient for the driver to operate on the operating platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural diagram of the utility model bridge reversing mechanism in the off state;

[0026] Figure 2 is a structural diagram of the utility model bridge reversing mechanism in a closed state;

[0027] FIG3 is a schematic diagram of the structure of a combine harvester from a top view.

[0028] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0029] 1. Bridge transmission shaft; 2. Support; 3. Driving wheel; 4. Passive wheel; 5. Belt; 6. Support shaft; 7. Handle; 8. Torsion spring; 9. Handle shaft; 10. Limit rod; 11. First pull rod; 12. Rocker arm; 13. Second pull rod; 14. Bridge mechanism; 15. Operating table. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] As shown in Figures 1 and 2, this embodiment provides a bridge reversing mechanism, including a frame and a bridge transmission shaft 1, the bridge transmission shaft 1 is rotatably mounted on the frame, and also includes a support 2, a driving wheel 3, a passive wheel 4, a belt 5, a driving mechanism and a clutch operating component, the passive wheel 4 is fixedly connected to the bridge transmission shaft 1, the driving mechanism is fixed on the support 2, the driving mechanism is transmission-connected to the driving wheel 3, the belt 5 is sleeved on the driving wheel 3 and the passive wheel 4, the clutch operating component is installed on the frame, the clutch operating component is transmission-connected to the support 2, and drives the support 2 to move away from or close to the bridge transmission shaft 1 to tighten or loosen the belt 5.

[0032] The bridge reversing mechanism uses a drive mechanism to provide power and reverse the bridge drive shaft 1. The clutch operating assembly manipulates the support 2, which in turn moves the drive wheel 3 and the drive mechanism, changing the center distance between the drive wheel 3 and the driven wheel 4. This controls the tension and slack of the belt 5, achieving power clutching. This bridge reversing mechanism eliminates the need for a tensioner pulley and eliminates the need to extract power from the transmission case. It can be deployed on both longitudinal and transverse flow models.

[0033] In the description of this embodiment, the disengaged state refers to a state in which the belt 5 is loosened and no power is transmitted between the driving wheel 3 and the driven wheel 4; the engaged state refers to a state in which the belt 5 is tensioned and the driving wheel 3 can drive the driven wheel 4 to rotate through the belt 5.

[0034] Under normal circumstances, the bridge reversing mechanism is in the disengaged state. Only when the bridge or the header is blocked, it is necessary to operate the clutch operating component to switch the bridge reversing mechanism to the engaged state to drive the bridge transmission shaft 1 to reverse.

[0035] Optionally, the clutch operating component can drive the support 2 to move linearly or swing around a certain axis. Accordingly, the clutch operating component can be a linear action mechanism such as a guide rail slider assembly, a linear motor, an electric telescopic rod, an oil cylinder or an air cylinder, or the clutch operating component can be a swinging action mechanism such as a connecting rod assembly or a rotary motor.

[0036] Based on any of the above schemes, the bridge reversing mechanism also includes a support shaft 6, which is fixedly connected to the frame, one end of the support 2 is hinged to the support shaft 6, and the clutch operating assembly is transmission-connected to the other end of the support 2.

[0037] The clutch operating assembly drives the support 2 to rotate around the support rotating shaft 6. The driving force required by the clutch operating assembly is relatively small, which is convenient for manual operation.

[0038] On the basis of any of the above solutions, the clutch operating assembly includes a handle 7 , a middle portion of the handle 7 is hinged to the frame, and one end of the handle 7 is transmission-connected to the support 2 .

[0039] Based on any of the above schemes, the clutch operating assembly also includes a torsion spring 8 and a handle shaft 9, the handle shaft 9 is fixedly connected to the frame, the middle part of the handle 7 is hinged to the handle shaft 9, the torsion spring 8 is sleeved on the handle shaft 9, and its two ends are respectively in contact with the handle 7 and the frame.

[0040] The elastic force of the torsion spring 8 can reset the handle 7, so that when the handle 7 is in the reset state, the driving wheel 3 and the driven wheel 4 are in a disengaged state.

[0041] On the basis of any of the above solutions, the clutch operating assembly further includes a limiting rod 10 , which is fixedly connected to the frame and is used to limit the rotation range of the handle 7 .

[0042] The limiting rod 10 limits the rotation range of the handle 7 to prevent the handle 7 from rotating too much during manual operation.

[0043] Specifically, the limiting rod 10 is used to limit the position of the handle 7 when it is rotated to the off state.

[0044] On the basis of any of the above solutions, the bridge reversing mechanism further includes a cutting platform clutch control switch, and the cutting platform clutch control switch is transmission-connected to the handle 7 .

[0045] The cutting platform clutch control switch is in transmission connection with the handle 7. When the handle 7 is rotated to make the driving wheel 3 and the driven wheel 4 in the closed state, the handle 7 simultaneously drives the cutting platform clutch control switch to make the cutting platform clutch in the closed state.

[0046] Specifically, the header clutch control switch is installed on the handle shaft 9. The clockwise or counterclockwise rotation of the handle 7 pushes the header clutch control switch to two different states respectively. The header clutch control switch is communicated with the vehicle's controller and transmits the status signal to the controller. The controller controls the switching of the header clutch of the combine harvester according to the status signal.

[0047] Based on any of the above schemes, the clutch operating assembly also includes a first pull rod 11, a rocker arm 12 and a second pull rod 13, one end of the first pull rod 11 is hinged to one end of the handle 7, the other end of the first pull rod 11 is hinged to one end of the rocker arm 12, the other end of the rocker arm 12 is hinged to one end of the second pull rod 13, the other end of the second pull rod 13 is hinged to the support 2, and the middle part of the rocker arm 12 is hinged to the frame.

[0048] The handle 7 drives the support 2 to move through the first pull rod 11, the rocker arm 12 and the second pull rod 13.

[0049] Specifically, as shown in Figures 1 and 2, the rocker arm 12 is a V-shaped or L-shaped rod. The first pull rod 11 and the second pull rod 13 are both straight rods.

[0050] Based on any of the above solutions, the driving mechanism is a hydraulic motor or an electric motor.

[0051] In one specific example, the drive mechanism is a hydraulic motor. Normally, the bridge reversing mechanism is in the disengaged state shown in Figure 1. To clear a bridge blockage, handle 7 is rotated counterclockwise to the state shown in Figure 2. Handle 7 activates first pull rod 11, which in turn drives rocker arm 12 clockwise. Rocker arm 12, via second pull rod 13, pushes support 2 clockwise about support axis 6, tightening belt 5. Drive pulley 3 rotates driven pulley 4 via belt 5, which in turn rotates bridge transmission shaft 1.

[0052] After the handle 7 is released, the handle 7 is reset to the position shown in Figure 1 under the elastic force of the torsion spring 8. Accordingly, the support 2 rotates counterclockwise around the support shaft 6 to reset, the belt 5 is loosened, and power is no longer transmitted between the driving wheel 3 and the driven wheel 4.

[0053] As shown in FIG3 , this embodiment further provides a combine harvester including the bridge reversing mechanism.

[0054] Based on the above scheme, the combine harvester also includes a bridge mechanism 14 and an operating platform 15 fixed on the frame at laterally intervals. The bridge transmission shaft 1 is transmission-connected to the bridge mechanism 14 , and the clutch operating assembly is located between the bridge mechanism 14 and the operating platform 15 .

[0055] The clutch operating assembly is located between the bridge mechanism 14 and the operating platform 15 , making it convenient for the driver to operate on the operating platform 15 .

[0056] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0058] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bridge reversing mechanism, comprising a frame and a bridge transmission shaft (1), wherein the bridge transmission shaft (1) is rotatably mounted on the frame, characterized in that: The invention also comprises a support (2), a driving wheel (3), a driven wheel (4), a belt (5), a driving mechanism and a clutch operating component, wherein the driven wheel (4) is fixedly connected to the bridge transmission shaft (1), the driving mechanism is fixed on the support (2), the driving mechanism is transmission-connected to the driving wheel (3), the belt (5) is sleeved on the driving wheel (3) and the driven wheel (4), the clutch operating component is mounted on the frame, the clutch operating component is transmission-connected to the support (2), and drives the support (2) to move away from or close to the bridge transmission shaft (1) to tighten or loosen the belt (5).

2. A bridge reversing mechanism according to claim 1, characterized in that: It also comprises a support shaft (6), wherein the support shaft (6) is fixedly connected to the frame, one end of the support (2) is hinged to the support shaft (6), and the clutch operating component is transmission-connected to the other end of the support (2).

3. A bridge reversing mechanism according to claim 1, characterized in that: The clutch operating assembly comprises a handle (7), the middle part of the handle (7) is hinged to the frame, and one end of the handle (7) is drivingly connected to the support (2).

4. A bridge reversing mechanism according to claim 3, characterized in that: The clutch operating assembly further comprises a torsion spring (8) and a handle shaft (9), wherein the handle shaft (9) is fixedly connected to the frame, the middle portion of the handle (7) is hinged to the handle shaft (9), the torsion spring (8) is sleeved on the handle shaft (9), and its two ends are respectively in contact with the handle (7) and the frame.

5. A bridge reversing mechanism according to claim 4, characterized in that: The clutch operating assembly further comprises a limiting rod (10), wherein the limiting rod (10) is fixedly connected to the frame and is used to limit the rotation range of the handle (7).

6. A bridge reversing mechanism according to claim 3, characterized in that: It also comprises a cutting platform clutch control switch, which is transmission-connected to the handle (7).

7. A bridge reversing mechanism according to any one of claims 3 to 6, characterized in that: The clutch operating assembly also includes a first pull rod (11), a rocker arm (12) and a second pull rod (13), one end of the first pull rod (11) is hinged to one end of the handle (7), the other end of the first pull rod (11) is hinged to one end of the rocker arm (12), the other end of the rocker arm (12) is hinged to one end of the second pull rod (13), the other end of the second pull rod (13) is hinged to the support (2), and the middle part of the rocker arm (12) is hinged to the frame.

8. A bridge reversing mechanism according to any one of claims 1 to 6, characterized in that: The driving mechanism is a hydraulic motor or an electric motor.

9. A combine harvester, characterized in that: It comprises a bridge reversing mechanism as described in any one of claims 1 to 8.

10. A combine harvester according to claim 9, characterized in that: It also comprises a bridge mechanism (14) and an operating table (15) which are fixed on the frame at a transverse interval, the bridge transmission shaft (1) being transmission-connected to the bridge mechanism (14), and the clutch operating assembly being located between the bridge mechanism (14) and the operating table (15).

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