A harvester control system

Abstract

This application relates to the field of harvester technology and discloses a harvester control system, including a lifting cylinder, a lifting control component, a flow control component, and a hydraulic motor. The lifting cylinder includes a drive chamber; the lifting control component includes a lifting flow path and a lowering flow path, which are respectively connected to the drive chamber. When the lifting control component is working, either the lifting flow path or the lowering flow path is connected to the drive chamber; the flow control component includes a flow control flow path. Along the oil flow direction of the flow control flow path, the flow control component includes a reversing valve and a flow valve connected in sequence to the flow control flow path; the hydraulic motor is connected to the rear end of the flow valve; the lifting flow path is connected to the reversing valve. By connecting the lifting flow path to the reversing valve along the flow control flow path, the lifting control component is connected to the flow control component, thereby simplifying the harvester control system and reducing the space required for installation of the harvester control system.

Description

Technical Field

[0001] This application relates to the field of harvester technology, and more particularly to a harvester control system. Background Technology

[0002] Existing crop harvesters include a hydraulic system and a reel lifting cylinder. The flow control component in the hydraulic system controls the amount of oil flowing through the reel motor, thereby adjusting the reel speed. The lifting control component in the hydraulic system controls the extension of the piston shaft of the lifting cylinder, thereby adjusting the height of the reel.

[0003] However, the flow control component and the lifting control component in the hydraulic system of crop harvesters are independent of each other, which leads to an increase in the number of components in the hydraulic system and increases the installation space of the hydraulic system. Utility Model Content

[0004] This application provides a harvester control system that simplifies the harvester control system and reduces the installation space required for the harvester control system.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] This application provides a harvester control system, including a lifting cylinder, a lifting control component, a flow control component, and a hydraulic motor. The lifting cylinder includes a cylinder body and a piston, with the piston installed inside the cylinder body, dividing the cylinder body into a drive chamber and a driven chamber. The lifting control component includes a lifting flow path and a lowering flow path, both connected to the drive chamber. When the lifting control component is working, either the lifting flow path or the lowering flow path is connected to the drive chamber. The flow control component includes a flow control flow path. Along the oil flow direction of the flow control flow path, the flow control component includes a reversing valve and a flow valve connected sequentially to the flow control flow path. Along the oil flow direction of the flow control flow path, the hydraulic motor is connected to the rear end of the flow valve. The lifting flow path is connected to the reversing valve, which has a first operating state and a second operating state. When the reversing valve is in the first operating state, it is connected to the flow valve, allowing oil at the reversing valve to flow to the hydraulic motor. When the reversing valve is in the second operating state, it is connected to the lifting flow path, allowing oil at the reversing valve to flow to the drive chamber.

[0007] Furthermore, the lifting control component includes a lifting switching valve, which includes a first connecting flow channel and a first check flow channel. The first connecting flow channel or the first check flow channel is connected to the lifting flow path. When the first check flow channel is connected to the lifting flow path, it is disconnected from the lifting flow path and the drive chamber.

[0008] Furthermore, the lifting control component includes a check valve, which is connected to the lifting flow path and located between the lifting switching valve and the reversing valve. The check valve enables the first check flow channel to unidirectionally flow into the drive chamber. The oil in the first check flow channel can flow from the drive chamber toward the reversing valve. When the first check flow channel is connected to the lifting flow path, it disconnects from the lifting flow path and the drive chamber through the first check flow channel and the check valve.

[0009] Furthermore, the lifting control component includes a lowering switching valve, which includes a second connecting flow channel and a second check flow channel. The second connecting flow channel or the second check flow channel is connected to the lowering flow path; wherein, the second check flow channel enables unidirectional flow to the drive cavity.

[0010] Furthermore, the lifting control assembly includes a descending throttling flow path for releasing oil from the drive chamber, the descending throttling flow path being connected to the drive chamber.

[0011] Furthermore, the lifting control component includes an overflow flow path, which is connected to the lifting flow path to control the oil pressure within the lifting flow path.

[0012] Furthermore, the flow control component includes an on / off valve and an oil inlet, with the on / off valve located between the oil inlet and the directional valve; the on / off valve includes an on-flow passage and a off-flow passage, with either the on-flow passage or the off-flow passage connected to the directional valve; when the on-flow passage is connected to the directional valve, the oil inlet is connected to the directional valve; when the off-flow passage is connected to the directional valve, the oil inlet is disconnected from the directional valve.

[0013] Furthermore, the flow control component includes an overflow valve, which is connected to the rear end of the start / stop valve along the direction of oil flow within the flow control path.

[0014] Furthermore, the flow control path includes a logic valve, which is connected to the rear end of the oil inlet along the oil flow direction within the flow control path.

[0015] Furthermore, the logic valve includes a throttling channel and a throttling shut-off channel, with the throttling channel or the throttling shut-off channel connected to the oil inlet.

[0016] By connecting the lifting flow path to the reversing valve along the flow control flow path, the lifting control component is connected to the flow control component, enabling the harvester control system to simultaneously control the lifting cylinder's lifting and the hydraulic motor's rotation. This simplifies the harvester control system and reduces the space required for its installation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the harvester control system provided in this application.

[0019] Figure 2 yes Figure 1 A schematic diagram showing the oil flow rate of the lifting cylinder in the harvester control system during the lifting process.

[0020] Figure 3 yes Figure 1 A schematic diagram showing the oil flow rate of the lifting cylinder in the harvester control system during the descent process.

[0021] Figure 4 yes Figure 1 A schematic diagram showing the oil flow rate of the hydraulic motor in the harvester control system during operation.

[0022] Explanation of reference numerals in the attached drawings: Lifting cylinder 1, cylinder body 101, piston 102, drive chamber 103, driven chamber 104, lifting control assembly 2, lifting flow path 201, lowering flow path 202, lifting switching valve 203, first connecting flow channel 2031, first check flow channel 2032, check valve 204, lowering switching valve 205, second connecting flow channel 2051, second check flow channel 2052, lowering throttling flow path 206, cylinder throttling valve 2061, overflow flow path 207, lifting overflow valve 207 1. Pressure holding flow path 208, output flow path 2081, input flow path 2082, flow control component 3, flow control flow path 301, reversing valve 302, flow control end 3021, lifting control end 3022, spring 3023, flow valve 303, start / stop valve 304, start flow channel 3041, stop flow channel 3042, oil inlet 305, overflow valve 306, logic valve 307, throttling flow channel 3071, throttling and closing channel 3072, hydraulic motor 4, oil tank 5, return port 6. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] like Figure 1 As shown, as one implementation, this application provides a harvester control system, including: a lifting cylinder 1, a lifting control component 2, a flow control component 3, a hydraulic motor 4, and an oil tank 5. The lifting cylinder 1 is used to control the height of the reel, the hydraulic motor 4 is used to control the rotation of the reel, the lifting control component 2 is used to control the extension of the piston rod of the lifting cylinder 1, thereby changing the height of the reel, the flow control component 3 is used to control the rotation speed of the hydraulic motor 4 so that the reel can adapt to crops of different densities, and the oil tank 5 is used to recover the oil flowing through the lifting control component 2 and the flow control component 3.

[0025] The lifting cylinder 1 includes a cylinder body 101 and a piston 102. The piston 102 is installed inside the cylinder body 101 and can move relative to the cylinder body 101. The reel is installed on the shaft of the piston 102.

[0026] The piston 102 divides the cylinder 101 into a drive chamber 103 and a driven chamber 104. The driven chamber 104 is connected to the oil tank 5. When the lifting cylinder 1 is working, it controls the input or output of oil to the drive chamber 103, so that the volume of the drive chamber 103 changes. The driven chamber 104 changes with the volume of the drive chamber 103.

[0027] The lifting control assembly 2 includes a lifting flow path 201 and a lowering flow path 202, which are respectively connected to the drive cavity 103. When the lifting control assembly 2 is working, the lifting flow path 201 or the lowering flow path 202 is connected to the drive cavity 103. When the lifting flow path 201 is connected to the drive cavity 103, the volume of the drive cavity 103 increases, and the extension amount of the piston 102 shaft extending out of the cylinder 101 increases. When the lowering flow path 202 is connected to the drive cavity 103, the volume of the drive cavity 103 decreases, and the extension amount of the piston 102 shaft extending out of the cylinder 101 shortens.

[0028] The oil in the lifting flow path 201 can only flow toward the drive chamber 103, and the oil in the lowering flow path 202 can only flow out toward the direction away from the drive chamber 103.

[0029] The flow control assembly 3 includes a flow control path 301. Along the oil flow direction of the flow control path 301, the flow control assembly 3 includes a reversing valve 302 and a flow valve 303 connected in sequence to the flow control path 301. Along the oil flow direction of the flow control path 301, the hydraulic motor 4 is connected to the rear end of the flow valve 303. The flow rate flowing into the hydraulic motor 4 is controlled by the flow valve 303, thereby changing the speed of the hydraulic motor 4.

[0030] The lifting flow path 201 is connected to the reversing valve 302, which is a two-position three-way reversing valve, so that the reversing valve 302 has a first use state and a second use state. The first use state is used to control the rotation of the hydraulic motor 4, and the second use state is used to control the lifting cylinder 1 to lift.

[0031] By connecting the lifting flow path 201 to the reversing valve 302 along the flow control flow path 301, the lifting control component 2 is connected to the flow control component 3, thereby simplifying the harvester control system and reducing the space required for the installation of the harvester control system.

[0032] When the directional valve 302 is in the first operating state, the directional valve 302 is connected to the flow valve 303, so that the oil at the directional valve 302 flows to the hydraulic motor 4, and the flow rate flowing into the hydraulic motor 4 can be adjusted by controlling the flow valve 303, so as to change the speed of the hydraulic motor 4.

[0033] When the reversing valve 302 is in the second operating state, the reversing valve 302 is connected to the lifting flow path 201, so that the oil at the reversing valve 302 flows to the drive chamber 103, thereby realizing the lifting of the lifting cylinder 1.

[0034] As one implementation, the lifting control component 2 includes a lifting switching valve 203, which is connected to the lifting flow path 201. The lifting switching valve 203 includes a first connecting flow channel 2031 and a first check flow channel 2032, which are connected to the lifting flow path 201.

[0035] When the first check flow channel 2032 is connected to the lifting flow path 201, the lifting flow path 201 is disconnected from the drive chamber 103, and the oil at the reversing valve 302 cannot flow to the drive chamber 103.

[0036] When the first connecting flow channel 2031 is connected to the lifting flow path 201, the oil at the reversing valve 302 can flow to the drive chamber 103.

[0037] The lifting switching valve 203 controls the opening and closing of the lifting flow path 201 in order to maintain the state of the lifting cylinder (maintain the extension of the piston rod of piston 102).

[0038] As one implementation, the lifting control component 2 includes a check valve 204, which is connected to the lifting flow path 201 and is located between the lifting switching valve 203 and the reversing valve 302.

[0039] Furthermore, the check valve 204 enables the first check flow channel 2032 to unidirectionally flow into the drive chamber 103; the oil in the first check flow channel 2032 can flow from the drive chamber 103 toward the reversing valve 302.

[0040] When the first check flow channel 2032 is connected to the lifting flow path 201, it disconnects from the lifting flow path 201 and the drive chamber 103 through the first check flow channel 2032 and the check valve 204.

[0041] By setting the check valve 204, the oil in the lifting flow path 201 flows unidirectionally from the reversing valve 302 towards the drive chamber 103, preventing backflow of oil in the drive chamber 103 and thus maintaining the extension amount of the piston rod of the piston 102. At the same time, when the first check channel 2032 is connected to the lifting flow path 201, the check valve 204 and the first check channel 2032 cooperate to cut off the lifting flow path 201.

[0042] As one implementation, the lifting control component 2 includes a descent switching valve 205, which is connected to the descent flow path 202. The descent switching valve 205 includes a second connecting flow channel 2051 and a second check flow channel 2052, which are connected to the descent flow path 202.

[0043] Among them, the oil in the second check flow channel 2052 can flow from the second check flow channel 2052 toward the drive chamber 103.

[0044] Under normal conditions, the second check flow channel 2052 is connected to the descending flow path 202 to prevent the oil in the drive chamber 103 from flowing out through the descending flow path 202. When it is necessary to drive the reel to descend for maintenance, the second connecting flow channel 2051 is connected to the descending flow path 202. Since the end of the descending flow path 202 is connected to the oil tank 5, the oil in the drive chamber 103 is discharged into the oil tank 5.

[0045] The setting of the descent switching valve 205 facilitates the descent of the piston 102 of the lifting cylinder 1, thereby facilitating the descent of the reel and making it easier to maintain the reel.

[0046] As one implementation, the lifting control assembly 2 includes a descending throttling flow path 206 for releasing oil from the drive chamber 103, with both ends of the descending throttling flow path 206 connected to the drive chamber 103 and the oil tank 5, respectively.

[0047] A hydraulic cylinder throttle valve 2061 is installed on the descent throttle flow path 206. When the descent switching valve 205 fails, the hydraulic cylinder throttle valve 2061 is opened to discharge the oil in the drive chamber 103 into the oil tank 5, ensuring that the piston 102 of the lifting cylinder 1 can be stably driven to descend under special conditions, thereby improving the safety of the harvester control system.

[0048] As one implementation, the lifting control component 2 includes an overflow flow path 207, which is connected to the lifting flow path 201. A lifting overflow valve 2071 is installed on the overflow flow path 207 to control the oil pressure in the lifting flow path 201.

[0049] Specifically, one end of the overflow flow path 207 is connected between the check valve 204 and the reversing valve 302, and the other end is connected to the oil tank 5. The overflow flow path 207 is designed to prevent the oil pressure in the lifting flow path 201 from being too high, thereby improving the safety of the harvester control system.

[0050] As one implementation, the lifting control component 2 also includes a pressure holding flow path 208, which includes an output flow path 2081 and an input flow path 2082.

[0051] The reversing valve 302 includes a flow control end 3021, a lifting control end 3022, and a spring 3023. The spring is connected to the lifting control end 3022. When the flow control end 3021 is connected to the flow control flow path 301, the oil is delivered to the hydraulic motor 4. When the lifting control end 3022 is connected to the lifting flow path 201, the oil is delivered to the drive chamber 103.

[0052] One end of the output flow path 2081 is connected to the end of the lifting flow path 201 near the reversing valve 302, and the other end is connected to the flow control end 3021, which is used to transmit the oil pressure of the lifting flow path 201 near the reversing valve 302 to the reversing valve 302.

[0053] One end of the input flow path 2082 is connected to the end of the lifting flow path 201 near the drive chamber 103, and the other end is connected to the lifting control end 3022, which is used to transmit the oil pressure of the lifting flow path 201 near the drive chamber 103 to the reversing valve 302.

[0054] The sum of the oil pressure and the spring force at the lifting flow path 201 near the reversing valve 302 is equal to the oil pressure at the lifting flow path 201 near the drive chamber 103. When the sum of the oil pressure and the spring force at the lifting flow path 201 near the reversing valve 302 is not equal to the oil pressure at the lifting flow path 201 near the drive chamber 103, the opening degree of the reversing valve 302 in the second use state changes, thereby maintaining the oil pressure delivered to the drive chamber 103 at a certain value.

[0055] As one implementation, the flow control component 3 includes a start-stop valve 304 and an oil inlet 305. The start-stop valve 304 is located between the oil inlet 305 and the reversing valve 302. The start-stop valve 304 includes a start flow channel 3041 and a stop flow channel 3042. The start flow channel 3041 or the stop flow channel 3042 is connected to the reversing valve 302.

[0056] When the start flow channel 3041 is connected to the reversing valve 302, the oil inlet 305 is connected to the reversing valve 302.

[0057] When the flow channel 3042 is closed and connected to the reversing valve 302, the oil inlet 305 is disconnected from the reversing valve 302.

[0058] The start / stop valve 304 is used to control the start and stop of the harvester's control system.

[0059] As one implementation, the flow control component 3 includes an overflow valve 306. Along the oil flow direction in the flow control flow path 301, the overflow valve 306 is connected to the rear end of the start / stop valve 304, and the rear end of the overflow valve 306 is connected to a return port 6.

[0060] The overflow valve 306 is designed to prevent excessive oil pressure in the flow control component 3, thereby improving the safety of the harvester control system.

[0061] As one implementation, the flow control path 301 includes a logic valve 307, which is connected to the rear end of the oil inlet 305 along the oil flow direction within the flow control path 301.

[0062] The logic valve 307 includes a throttling channel 3071 and a throttling closing channel 3072, and the throttling channel 3071 or the throttling closing channel 3072 is connected to the oil inlet 305.

[0063] Under normal conditions, the two ends of the throttling channel 3071 are connected to the oil inlet 305 and the oil return port 6 respectively, so that the harvester control system can directly relieve pressure through the logic valve 307. When the harvester control system is working, the throttling closing channel 3072 is connected to the oil inlet 305, so that the oil in the oil inlet 305 flows to the start / stop valve 304.

[0064] By setting the logic valve 307, when the lifting control component 2 and the flow control component 3 are not used, the oil at the oil inlet 305 can be directly depressurized into the oil tank 5 through the logic valve 307, so as to prevent damage to the harvester control system.

[0065] The working principle of the harvester control system is as follows:

[0066] When the harvester control system is started, logic valve 307 is closed, throttling and closing channel 3072 is connected to oil inlet 305, start / stop valve 304 is opened, and oil inlet 305 flows to reversing valve 302.

[0067] When the directional valve 302 is in the first operating state, the directional valve 302 is connected to the flow valve 303, so that the oil at the directional valve 302 flows to the hydraulic motor 4, and the flow rate into the hydraulic motor 4 can be controlled by the flow valve 303, so as to change the speed of the hydraulic motor 4. The operator can control the harvesting speed according to the crop density.

[0068] When the reversing valve 302 is in the second operating state, the reversing valve 302 is connected to the lifting flow path 201;

[0069] When the first check flow channel 2032 of the lifting switching valve 203 is connected to the lifting flow path 201, the lifting flow path 201 is depressurized through the lifting overflow valve 2071.

[0070] When the first connecting channel 2031 is connected to the lifting channel 201, the oil at the reversing valve 302 can flow to the drive chamber 103, causing the piston 102 of the lifting cylinder 1 to rise. After the lifting cylinder 1 is adjusted, the first check channel 2032 is connected to the lifting channel 201 to maintain the state of the lifting cylinder 1.

[0071] Under normal conditions, the second check flow channel 2052 is connected to the descending flow path 202 to maintain the state of the lifting cylinder 1. When the piston 102 of the lifting cylinder 1 needs to descend, the second connecting flow channel 2051 is connected to the descending flow path 202, so that the oil in the drive chamber 103 is discharged into the oil tank 5.

[0072] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0073] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A harvester control system characterized by, include: The lifting cylinder (1) includes a cylinder body (101) and a piston (102). The piston (102) is installed inside the cylinder body (101) and divides the cylinder body (101) into a driving chamber (103) and a driven chamber (104). The lifting control component (2) includes a lifting flow path (201) and a lowering flow path (202), both of which are connected to the drive cavity (103). When the lifting control component (2) is working, the lifting flow path (201) or the lowering flow path (202) is connected to the drive cavity (103). A flow control component (3) includes a flow control path (301). Along the oil flow direction of the flow control path (301), the flow control component (3) includes a reversing valve (302) and a flow valve (303) connected in sequence to the flow control path (301). A hydraulic motor (4) is connected to the rear end of the flow valve (303) along the oil flow direction of the flow control path (301). The lifting flow path (201) is connected to the reversing valve (302), and the reversing valve (302) has a first operating state and a second operating state. When the reversing valve (302) is in the first operating state, the reversing valve (302) is connected to the flow valve (303), so that the oil at the reversing valve (302) flows to the hydraulic motor (4); When the reversing valve (302) is in the second operating state, the reversing valve (302) is connected to the lifting flow path (201), so that the oil at the reversing valve (302) flows to the drive chamber (103).

2. A harvester control system according to claim 1, characterised in that, The lifting control component (2) includes a lifting switching valve (203), which includes a first connecting flow channel (2031) and a first check flow channel (2032). The first connecting flow channel (2031) or the first check flow channel (2032) is connected to the lifting flow path (201). When the first anti-reverse flow channel (2032) is connected to the lifting flow path (201), the lifting flow path (201) is disconnected from the driving cavity (103).

3. A harvester control system according to claim 2, characterized in that, The lifting control assembly (2) includes a check valve (204), which is connected to the lifting flow path (201) and is located between the lifting switching valve (203) and the reversing valve (302). The check valve (204) enables the first check flow channel (2032) to unidirectionally flow into the drive chamber (103); The oil in the first check flow channel (2032) can flow from the drive chamber (103) toward the reversing valve (302); When the first check flow channel (2032) is connected to the lifting flow path (201), the lifting flow path (201) is disconnected from the driving cavity (103) through the first check flow channel (2032) and the check valve (204).

4. A harvester control system according to claim 1, characterised in that, The lifting control component (2) includes a descent switching valve (205), which includes a second connecting flow channel (2051) and a second check flow channel (2052). The second connecting flow channel (2051) or the second check flow channel (2052) is connected to the descent flow path (202). The second anti-reverse flow channel (2052) enables unidirectional flow to the drive cavity (103).

5. A harvester control system according to claim 1, wherein, The lifting control assembly (2) includes a descending throttling flow path (206) for releasing oil from the drive chamber (103), the descending throttling flow path (206) being connected to the drive chamber (103).

6. A harvester control system according to claim 1, characterised in that, The lifting control component (2) includes an overflow flow path (207) connected to the lifting flow path (201) to control the oil pressure in the lifting flow path (201).

7. A harvester control system according to claim 1, characterized in that, The flow control component (3) includes a start / stop valve (304) and an oil inlet (305), wherein the start / stop valve (304) is located between the oil inlet (305) and the reversing valve (302); The start / stop valve (304) includes a start flow channel (3041) and a stop flow channel (3042), and the start flow channel (3041) or the stop flow channel (3042) is connected to the reversing valve (302); When the starting flow channel (3041) is connected to the reversing valve (302), the oil inlet (305) is connected to the reversing valve (302); When the closed flow channel (3042) is connected to the reversing valve (302), the oil inlet (305) is disconnected from the reversing valve (302).

8. A harvester control system according to claim 7, characterised in that, The flow control component (3) includes an overflow valve (306) along the oil flow direction in the flow control flow path (301), and the overflow valve (306) is connected to the rear end of the start / stop valve (304).

9. A harvester control system according to claim 7, characterised in that, The flow control path (301) includes a logic valve (307) connected to the rear end of the oil inlet (305) along the oil flow direction within the flow control path (301).

10. A harvester control system according to claim 9, characterised in that, The logic valve (307) includes a throttling channel (3071) and a throttling shut-off channel (3072), and the throttling channel (3071) or the throttling shut-off channel (3072) is connected to the oil inlet (305).

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