Digitally controlled hoist

Abstract

The application provides a digital control lifter, which comprises a lifter body and a rack, the lifter body comprises an oil pump, a lifting shaft and a lifting arm, the oil pump is connected with a hydraulic cylinder through a pipeline, the oil pump provides power for the hydraulic cylinder, the telescopic end of the hydraulic cylinder is used for driving the lifting arm to lift, the lifting arm is fixedly connected on the lifting shaft, the rack is fixedly connected with a mounting seat, the lifting shaft is rotatably installed in the mounting seat, the mounting seat is provided with a mounting bracket corresponding to the lifting shaft, a sensor assembly is installed on the mounting bracket, and the sensor assembly is electrically connected with a digital display control host.The application has the advantages that: through the installation of an angle sensor, the rotating angle of the rotating shaft can be measured in real time, continuously and accurately, and the real-time height of the lifter or the plowing depth of the farm tool can be calculated through the control system; and through the setting of a limit switch, the oil pump pipeline can be automatically cut off before the lifter reaches the physical limit position, so that the work is immediately stopped.

Description

Technical Field

[0001] This utility model relates to the field of tractor parts, specifically to a digital control lifter. Background Technology

[0002] The modernization and intelligentization of agricultural machinery are key to improving agricultural production efficiency. In tractor operation, the hydraulic lift is the core working component for raising and lowering implements and controlling tillage depth. The accuracy and reliability of its control directly affect the quality of operation, such as the consistency of sowing depth and the uniformity of plowing depth.

[0003] Traditional tractor hydraulic lifts typically employ mechanical or hydraulic control. Operators primarily control the hydraulic valve opening via a lever in the cab, thereby controlling the oil pump's extension and retraction to raise and lower the lift. This control method has several significant drawbacks: First, the height control precision is poor, relying heavily on manual experience. Operators cannot accurately know the real-time height of the lifting device or the precise tillage depth of the implements, and can only rely on visual estimation and experience to judge and operate. This not only makes it difficult to guarantee the accuracy of the operation, easily causing inconsistent depths and affecting crop growth, but the problem is also particularly prominent when operating at night or in low visibility conditions.

[0004] Secondly, there is a lack of effective limit position protection. If the operator fails to stop the operation in time during the process of the elevator reaching its highest or lowest point, the hydraulic system will continue to operate. This causes excessive stress on the mechanical components inside the lifting mechanism or oil pump (such as the piston rod), resulting in a violent impact (commonly known as "cylinder knocking" or "cylinder slamming"). Over time, this will accelerate the aging of oil seals, damage the oil pump, and even lead to hydraulic line rupture, significantly shortening the equipment's lifespan and increasing maintenance costs. Utility Model Content

[0005] The objective of this utility model is achieved through the following technical measures: a digitally controlled lifting device, comprising a lifting device body and a frame. The lifting device body includes an oil pump, a lifting shaft, and a lifting arm. The oil pump is connected to a hydraulic cylinder via a pipeline, and the oil pump provides power to the hydraulic cylinder. The telescopic end of the hydraulic cylinder is used to drive the lifting arm to rise and fall. The lifting arm is fixedly connected to the lifting shaft. A mounting base is fixedly connected to the frame. The lifting shaft is rotatably mounted in the mounting base. A mounting bracket is mounted on the mounting base corresponding to the lifting shaft. A sensor assembly is mounted on the mounting bracket, and the sensor assembly is electrically connected to a digital display. The control host, a digital display control host, is used to control the start and stop of the oil pump, thereby controlling the lifting height of the lifting arm. The sensor assembly includes a limit switch assembly and an angle sensor. The limit switch assembly includes a low-position limit switch and a high-position limit switch. The low-position limit switch is used to transmit the signal that the lifting shaft is at its lowest position to the digital display control host, and the high-position limit switch is used to transmit the signal that the lifting shaft is at its highest position to the digital display control host. The angle sensor is drivenly connected to the lifting shaft, and the angle sensor transmits the rotation angle information of the lifting shaft to the digital display control host.

[0006] As a preferred embodiment, the mounting bracket includes a fixing ring, a connecting plate, and a sensor bracket. The fixing ring is fixedly connected to the mounting base, and the connecting plate is used to fix the fixing ring and the sensor bracket.

[0007] As a preferred embodiment, multiple connecting plates are provided, and the multiple connecting plates are fixedly connected to the fixing ring and the sensor bracket at a position away from the lifting arm.

[0008] As a preferred embodiment: a fixing plate is detachably connected to the end of the lifting shaft, a drive shaft is fixedly connected to the fixing plate, the drive shaft is driven by a coupling, and the coupling is driven by the input shaft of the angle sensor.

[0009] As a preferred embodiment: the fixed plate has a shaft hole, and a fixed transmission shaft is fixedly connected to the end of the lifting shaft. The fixed transmission shaft passes through the shaft hole and is connected to the coupling for transmission.

[0010] As a preferred embodiment, the lifting shaft and the lifting arm are connected by a spline.

[0011] As a preferred embodiment, the digital display control host includes a digital touch screen, a control handle, a lifting control handwheel, and a power switch.

[0012] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are: By installing angle sensors, the rotation angle of the shaft can be measured in real time, continuously, and accurately, and the control system can calculate the real-time height of the lift or the tillage depth of the implement. This completely changes the traditional extensive operation mode that relies on the driver's visual estimation and experience, greatly improves the accuracy of operation, and provides a reliable technical foundation for the implementation of precision agriculture (such as precision seeding, uniform fertilization, and constant depth tillage).

[0013] By setting limit switches, the system can automatically cut off the oil pump circuit and stop working immediately before the hoist reaches its physical limit position. This effectively avoids the severe impact and overload caused by "cylinder ramming" or "cylinder smashing" in the hydraulic system, fundamentally protecting key components such as the oil pump, hydraulic pipelines, and hoisting mechanism, significantly extending the service life of the entire hydraulic hoisting system, and reducing the failure rate and maintenance costs.

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Appendix Figure 2 This is a schematic diagram of the structure from another perspective of this utility model.

[0017] Appendix Figure 3 This is a structural schematic diagram of the lifting shaft, fixing plate, and transmission shaft of this utility model.

[0018] Appendix Figure 4 This is a schematic diagram of the structure of the digital display control host of this utility model.

[0019] Appendix Figure 5 This is a structural schematic diagram of the lifting shaft and fixed transmission shaft of this utility model. Detailed Implementation

[0020] Example 1: As shown in the attached document Figure 1 To be continued Figure 4As shown, a digitally controlled lifting device includes a lifting device body and a frame. The lifting device body includes an oil pump 1, a lifting shaft 2, and a lifting arm 3. The oil pump 1 is connected to a hydraulic cylinder 4 via a pipeline, and the oil pump 1 provides power to the hydraulic cylinder 4. The telescopic end of the hydraulic cylinder 4 is used to drive the lifting arm 3 to rise and fall. The lifting arm 3 is fixedly connected to the lifting shaft 2. A mounting base 5 is fixedly connected to the frame. The lifting shaft 2 is rotatably mounted in the mounting base 5. A mounting bracket 6 is mounted on the mounting base 5 corresponding to the lifting shaft 2. A sensor assembly is mounted on the mounting bracket 6. The sensor assembly is electrically connected to a digital display control host 7. The control host 7 is used to control the start and stop of the oil pump 1, thereby controlling the lifting height of the lifting arm 3. The sensor assembly includes a limit switch assembly 8 and an angle sensor 9. The limit switch assembly 8 includes a low limit switch 81 and a high limit switch 82. The low limit switch 81 is used to transmit the signal that the lifting shaft 2 is at its lowest position to the digital display control host 7. The high limit switch 82 is used to transmit the signal that the lifting shaft 2 is at its highest position to the digital display control host 7. The angle sensor 9 is connected to the lifting shaft 2 and transmits the rotation angle information of the lifting shaft 2 to the digital display control host 7.

[0021] The low-position limit switch 81 and the high-position limit switch 82 are triggered when the lifting arm 3 reaches its highest and lowest points, respectively, stopping the oil pump via the main unit 7. This automatically cuts off the oil pump circuit before reaching the limit positions, immediately stopping operation. This effectively avoids severe impacts and overloads caused by "cylinder slamming" or "cylinder knocking" in the hydraulic system, fundamentally protecting key components such as the oil pump, hydraulic lines, and lifting mechanism. It significantly extends the service life of the entire hydraulic lifting system and reduces the failure rate and maintenance costs.

[0022] The mounting bracket 6 includes a fixing ring 61, a connecting plate 62, and a sensor bracket 63. The fixing ring 61 is fixedly connected to the mounting base 5, and the connecting plate 62 is used to fix the fixing ring 61 and the sensor bracket 63.

[0023] Multiple connecting plates 62 are provided, and multiple connecting plates 62 are fixedly connected to the fixing ring 61 and the sensor bracket 63 at a position away from the lifting arm 3.

[0024] The end of the lifting shaft 2 is detachably connected to a fixing plate 21, and a drive shaft 211 is fixedly connected to the fixing plate 21. The drive shaft 211 is driven by a coupling 10, and the coupling 10 is driven by the input shaft of the angle sensor 9.

[0025] The lifting shaft 2 and the lifting arm 3 are connected by a spline. The diameter of the fixing plate 21 is larger than the diameter of the lifting shaft 2 and the lifting arm 3. The fixing plate 21 is fixedly connected to the lifting shaft 2 to prevent the lifting arm 3 from falling off.

[0026] The digital display control host 7 includes a digital display touch screen 71, a control handle 72, a lifting control handwheel 73, and a power switch 74.

[0027] Example 2: As shown in the attached document Figure 1 Appendix Figure 2 Appendix Figure 4 and attached Figure 5 As shown, a digitally controlled lifting device includes a lifting device body and a frame. The lifting device body includes an oil pump 1, a lifting shaft 2, and a lifting arm 3. The oil pump 1 is connected to a hydraulic cylinder 4 via a pipeline, and the oil pump 1 provides power to the hydraulic cylinder 4. The telescopic end of the hydraulic cylinder 4 is used to drive the lifting arm 3 to rise and fall. The lifting arm 3 is fixedly connected to the lifting shaft 2. A mounting base 5 is fixedly connected to the frame. The lifting shaft 2 is rotatably mounted in the mounting base 5. A mounting bracket 6 is mounted on the mounting base 5 corresponding to the lifting shaft 2. A sensor assembly is mounted on the mounting bracket 6. The sensor assembly is electrically connected to a digital display control host 7. The control host 7 is used to control the start and stop of the oil pump 1, thereby controlling the lifting height of the lifting arm 3. The sensor assembly includes a limit switch assembly 8 and an angle sensor 9. The limit switch assembly 8 includes a low limit switch 81 and a high limit switch 82. The low limit switch 81 is used to transmit the signal that the lifting shaft 2 is at its lowest position to the digital display control host 7. The high limit switch 82 is used to transmit the signal that the lifting shaft 2 is at its highest position to the digital display control host 7. The angle sensor 9 is connected to the lifting shaft 2 and transmits the rotation angle information of the lifting shaft 2 to the digital display control host 7.

[0028] The low-position limit switch 81 and the high-position limit switch 82 are triggered when the lifting arm 3 reaches its highest and lowest points, respectively, stopping the oil pump via the main unit 7. This automatically cuts off the oil pump circuit before reaching the limit positions, immediately stopping operation. This effectively avoids severe impacts and overloads caused by "cylinder slamming" or "cylinder knocking" in the hydraulic system, fundamentally protecting key components such as the oil pump, hydraulic lines, and lifting mechanism. It significantly extends the service life of the entire hydraulic lifting system and reduces the failure rate and maintenance costs.

[0029] The bracket 6 includes a fixing ring 61, a connecting plate 62, and a sensor bracket 63. The fixing ring 61 is fixedly connected to the mounting base 5, and the connecting plate 62 is used to fix the fixing ring 61 and the sensor bracket 63.

[0030] Multiple connecting plates 62 are provided, and multiple connecting plates 62 are fixedly connected to the fixing ring 61 and the sensor bracket 63 at a position away from the lifting arm 3.

[0031] The end of the lifting shaft 2 is detachably connected to a fixing plate 21, the fixing plate 21 has a shaft hole, and the end of the lifting shaft 2 is fixedly connected to a fixed transmission shaft 20, the fixed transmission shaft 20 passes through the shaft hole, and the fixed transmission shaft 20 is connected to the coupling 10 for transmission.

[0032] The lifting shaft 2 and the lifting arm 3 are connected by a spline. The diameter of the fixing plate 21 is larger than the diameter of the lifting shaft 2 and the lifting arm 3. The fixing plate 21 is fixedly connected to the lifting shaft 2 to prevent the lifting arm 3 from falling off.

[0033] The digital display control host 7 includes a digital display touch screen 71, a control handle 72, a lifting control handwheel 73, and a power switch 74.

[0034] It should be noted that the digital display touch screen 71 in this application has the functions of displaying data and touch operation. The host 7 has multiple preset working modes to choose from. The control handle 72 can manually operate the lifting arm 3. The lifting control handwheel 73 can perform precise lifting operations on the lifting arm 3. The power supply 74 is used to cut off and close the power supply of the host 7. The low-position limit switch 81 and the high-position limit switch 82 can be contact limit switches and electromagnetic induction limit switches. The spline connection between the lifting shaft 2 and the lifting arm 3 in this application is the prior art. In actual production, other connection methods can also be used for connection.

Claims

1. A digitally controlled lifting device, comprising a lifting device body and a frame, wherein the lifting device body includes an oil pump (1), a lifting shaft (2), and a lifting arm (3), the oil pump (1) is connected to a hydraulic cylinder (4) via a pipeline, the oil pump (1) provides power to the hydraulic cylinder (4), the telescopic end of the hydraulic cylinder (4) is used to drive the lifting arm (3) to lift, the lifting arm (3) is fixedly connected to the lifting shaft (2), a mounting base (5) is fixedly connected to the frame, and the lifting shaft (2) is rotatably mounted in the mounting base (5), characterized in that: The mounting base (5) is equipped with a mounting bracket (6) corresponding to the lifting shaft (2). A sensor assembly is mounted on the mounting bracket (6). The sensor assembly is electrically connected to a digital display control host (7). The digital display control host (7) is used to control the start and stop of the oil pump (1) to achieve the purpose of controlling the lifting height of the lifting arm (3). The sensor assembly includes a limit switch assembly (8) and an angle sensor (9). The limit switch assembly (8) includes a low limit switch (81) and a high limit switch (82). The low limit switch (81) is used to transmit the signal of the lifting shaft (2) at the lowest position to the digital display control host (7). The high limit switch (82) is used to transmit the signal of the lifting shaft (2) at the highest position to the digital display control host (7). The angle sensor (9) is connected to the lifting shaft (2) in a drive connection. The angle sensor (9) transmits the rotation angle information of the lifting shaft (2) to the digital display control host (7).

2. The digital control lifter according to claim 1, characterized in that: The mounting bracket (6) includes a fixing ring (61), a connecting plate (62) and a sensor bracket (63). The fixing ring (61) is fixedly connected to the mounting base (5), and the connecting plate (62) is used to fix the fixing ring (61) and the sensor bracket (63).

3. The digital control lifter according to claim 2, characterized in that: Multiple connecting plates (62) are provided, and multiple connecting plates (62) are fixedly connected to the fixing ring (61) and the sensor bracket (63) at a position away from the lifting arm (3).

4. A digital control lifter according to claim 3, characterized in that: The end of the lifting shaft (2) is detachably connected to a fixing plate (21), and a drive shaft (211) is fixedly connected to the fixing plate (21). The drive shaft (211) is connected to a coupling (10), and the coupling (10) is connected to the input shaft of the angle sensor (9).

5. A digital control lifter according to claim 4, characterized in that: The fixed plate (21) has a shaft hole, and the end of the lifting shaft (2) is fixedly connected to a fixed transmission shaft (20). The fixed transmission shaft (20) passes through the shaft hole and is connected to the coupling (10) for transmission.

6. A digital control lifter according to any one of claims 1 to 3, characterized in that: The lifting shaft (2) and the lifting arm (3) are connected by a spline.

7. A digital control lifter according to any one of claims 1 to 3, characterized in that: The digital display control host (7) includes a digital display touch screen (71), a control handle (72), a lifting control handwheel (73), and a power switch (74).

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