Special testing machine for header

Abstract

The utility model discloses a special testing machine for a header, which is characterized by comprising a mounting frame, the header, a height adjusting mechanism, a transmission simulation mechanism and a control mechanism, one end of the header is rotatably connected to the mounting frame, the height adjusting mechanism is used for adjusting the height of the header, and the transmission simulation mechanism is used for simulating the height of the header. The transmission simulation mechanism is used for simulating transmission of the header in the machine, the height adjusting mechanism comprises an executing mechanism and a transmission mechanism, and the executing mechanism acts on the other end of the header through the transmission mechanism so that the header can rotate on the vertical face around the connecting position of the header and the installation frame.

Description

Technical Field

[0001] This utility model is a special testing machine for cutting tables. Background Technology

[0002] Type B belts are widely used in transmission systems, especially in mechanical equipment and automotive transmission systems. Due to their specific groove angle design, Type B belts can adapt to pulleys of different diameters, thus ensuring transmission efficiency and operational stability. Their use is particularly prevalent in equipment such as lawnmowers. Lawnmowers operate in harsh environments, including high temperatures and angled transmission, which place high demands on belt performance. Therefore, lawnmowers often use imported, specially designed Type B belts to ensure stable performance.

[0003] With intensifying market competition, domestic belt manufacturers have begun to offer personalized services to meet customized needs, leading to a surge in demand. To ensure the quality and compatibility of Type B belts, the market demand for specialized testing equipment is also growing. However, existing testing machines on the market have some shortcomings, particularly in testing Type B belts for lawnmowers, where the safety, stability, and ease of operation of the cutter height adjustment mechanism urgently need improvement. Existing equipment performs unsatisfactorily in these aspects, failing to effectively address potential safety hazards and operational inconveniences during use. Summary of the Invention:

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dedicated testing machine for cutting platforms.

[0005] A testing machine for a cutting table includes a mounting frame, a cutting table, a height adjustment mechanism, a transmission simulation mechanism, and a control mechanism. One end of the cutting table is rotatably connected to the mounting frame. The height adjustment mechanism is used to adjust the height of the cutting table. The transmission simulation mechanism is used to simulate the transmission of the cutting table in the machine. The height adjustment mechanism includes an actuator and a transmission mechanism. The actuator acts on the other end of the cutting table through the transmission mechanism, causing the cutting table to rotate in a vertical plane around its connection with the mounting frame.

[0006] Furthermore, the cutting platform has a connecting part at the tail end with an elongated through hole on the side, and a clearance notch above the elongated through hole. A U-shaped bracket is provided on the mounting frame, and the bottom edge of the U-shaped bracket is movably engaged with the elongated through hole through the clearance notch.

[0007] Furthermore, the transmission simulation mechanism includes multiple pulleys, a first belt, a second belt, a transition pulley, a motor, and a clutch. The clutch and the transition pulley are coaxially mounted on the mounting frame. The first belt connects the transition pulley to the output end of the motor, and the second belt connects the clutch to the multiple pulleys to achieve transmission, thereby driving the cutter to work.

[0008] Furthermore, the control mechanism includes an electrical control cabinet, an electric shock protection device, a voltage converter, and a time relay. The electric shock protection device is used to protect the motor and the clutch, the voltage converter is used to convert the clutch voltage, the time relay controls the interval between clutch engagement and disengagement, and the electrical control cabinet is used to control the motor and the clutch.

[0009] Furthermore, the actuator is a linear telescopic cylinder, and the linkage mechanism includes a third link, one end of which is fixedly connected to the rotating shaft, and the other end of which is connected to the telescopic end of the cylinder.

[0010] Furthermore, the linkage mechanism and cylinder are located on the same side of the rotating shaft as the cutting table.

[0011] Furthermore, the height adjustment mechanism also includes a locking mechanism, which includes a locking plate, a handle, and a first connecting rod. The locking plate is fixedly sleeved on the outside of the handle, and the handle is rotatably connected to the mounting bracket. The edge of the locking plate is provided with multiple slots spaced apart circumferentially, and the vertical distance from each slot to the handle is different.

[0012] The first connecting rod is connected to the telescopic ends of the first connecting rod and the cylinder respectively at both ends. The side of the first connecting rod is provided with a guide groove, and a guide component is provided in the guide groove. The guide groove and the guide component are slidably engaged. The guide component is fixed on the mounting bracket. The first connecting rod is provided with a snap-fit ​​part that engages with the snap-fit ​​groove.

[0013] Furthermore, a second link is provided between the third link and the first link.

[0014] Furthermore, one end of the connecting plate is connected to a tension spring, and the other end of the tension spring is connected to the mounting bracket. The tension spring is located on the other side of the rotating shaft relative to the cutting table and the linkage mechanism.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages;

[0016] The height adjustment mechanism, through a combination of a rotating shaft, connecting plate, connecting rod, and linkage mechanism, achieves precise height adjustment of the cutting table. The axis of the rotating shaft is parallel to the rotation center line of the cutting table, ensuring stability and accuracy during height adjustment. The actuator (such as a cylinder) acts on the rotating shaft through the linkage mechanism, driving the connecting rod and the cutting table to achieve height adjustment. This structure features excellent mechanical design during adjustment, ensuring precise execution of each adjustment action and avoiding errors caused by structural flaws. It is suitable for automated testing scenarios requiring frequent adjustments, reducing operational deviations and improving testing reliability.

[0017] During height adjustment, the contraction force of the cylinder interacts with the gravity of the header, ensuring that the header can automatically rise and fall under different conditions. When the tension force of the cylinder contraction is greater than the gravity of the header, the header rises; when the tension force is less than the gravity of the header, the header falls. The tension spring provides additional compensating force to counteract the impact of the header's weight, reduce the load on the cylinder, and act as a buffer when the header falls. This not only reduces load fluctuations in the cylinder but also extends the service life of key components, while maintaining the stability and reliability of the system during dynamic adjustments.

[0018] The locking mechanism, through the cooperation of a locking plate, handle, and slots, provides a stable height locking function. Each slot represents a fixed height setting, and the handle can be rotated to control the locking plate to enter the corresponding slot, thereby achieving precise fixation of the cutting table height. This design ensures that the cutting table remains in a stable position after adjustment, avoiding height changes caused by external vibrations or misoperation. The locking mechanism is simple and reliable, improving safety during testing and preventing errors or safety hazards caused by equipment height slippage.

[0019] The height adjustment mechanism features a compact design, employing a side-mounted cylinder and linkage mechanism to reduce unnecessary structural complexity and wiring. This rational structural arrangement reduces the number of components and assembly difficulty, making the system more reliable. The simplified design not only enhances equipment stability but also simplifies daily maintenance and troubleshooting. Operators can quickly address equipment issues, thereby reducing maintenance costs and downtime, and improving overall equipment efficiency.

[0020] The design of this height adjustment mechanism greatly enhances operational convenience. Operators simply need to pull the cutting table to the desired height, then select and rotate the handle to align the clamping plate with the corresponding slot. Releasing the handle allows the clamping device to automatically engage the plate in the appropriate slot, thus achieving precise height adjustment of the cutting table. This process eliminates the need for complex adjustment steps and can be completed through simple mechanical operation, reducing operator workload and improving operational efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the test aircraft;

[0022] Figure 2 This is the main view of the test aircraft;

[0023] Figure 3 This is a schematic diagram showing the connection between the actuator, the linkage mechanism, and the tension spring in the height adjustment mechanism;

[0024] Figure 4 This is a schematic diagram of the locking mechanism;

[0025] In the diagram, 1. Mounting bracket, 2. Cutting table, 3. Height adjustment mechanism, 4. Motor, 5. Electrical control cabinet, 6. Pulley, 7. Transition wheel, 8. Clutch, 9. First belt, 10. Second belt, 11. Shaft, 12. Connecting plate, 13. Connecting rod, 14. Cylinder, 15. First connecting rod, 16. Second connecting rod, 17. Third connecting rod, 18. Guide component, 19. Guide groove, 20. Tension spring, 21. Connecting part, 22. Handle, 23. Clamping plate, 24. Clamping slot. Detailed Implementation

[0026] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0027] A testing machine for a cutting table includes a mounting frame 1, a cutting table 2, a height adjustment mechanism 3, a transmission simulation mechanism, and a control mechanism. One end of the cutting table 2 is rotatably connected to the mounting frame 1. The height adjustment mechanism 3 is used to adjust the height of the cutting table 2. The transmission simulation mechanism is used to simulate the transmission of the cutting table 2 in the machine. The height adjustment mechanism 3 includes an actuator and a transmission mechanism. The actuator acts on the other end of the cutting table 2 through the transmission mechanism, causing the cutting table 2 to rotate in a vertical plane around its connection with the mounting frame 1.

[0028] In this embodiment, the mounting frame 1 serves as the main structure, supporting and mounting other functional components. One end of the cutting table 2 is rotatably connected to the mounting frame 1, forming a fulcrum that allows the cutting table 2 to rotate around its axis. The height adjustment mechanism 3 controls the lifting and lowering of the cutting table 2 through its internal actuator. The actuator acts on the rotating shaft 11 through a linkage mechanism, which in turn drives the connecting plate 12 and connecting rod 13, causing the cutting table 2 to rotate around the rotating shaft 11 in the vertical plane, thus completing the height adjustment. The transmission simulation mechanism is mounted on the mounting frame 1 and drives the transition wheel 7 through the motor 4, via the clutch 8 and multiple sets of belts and pulleys 6, to simulate the working state of the cutter. The control mechanism includes an electrical control cabinet, a time relay, a voltage converter, and an electric shock protection device, used to adjust the operating parameters of the motor 4 and the clutch 8 to ensure safe and reliable test operation.

[0029] This implementation method achieves precise adjustment and multi-angle simulation of the cutting table 2 height, improving the accuracy of the test simulation. The mechanical structure automates the adjustment process, and the linkage mechanism forms a stable transmission path, enhancing the controllability and stability of the adjustment. The compact transmission simulation mechanism drives the cutter through clutch 8 and multi-stage belt linkage, effectively simulating real-world working conditions and providing support for performance verification and debugging. The electrical control section features overvoltage protection, delay control, and voltage conversion functions, improving the overall safety and intelligence of the test system.

[0030] In one possible implementation, the cutting table 2 has a connecting part 21 at its tail end and an elongated through hole on its side. A clearance notch is provided above the elongated through hole. A U-shaped bracket is provided on the mounting frame 1, and the bottom edge of the U-shaped bracket is movably engaged with the elongated through hole from the clearance notch.

[0031] This structure features a connecting part 21 at the tail end of the cutting table 2, with an elongated through hole on its side and a clearance notch above the through hole. This allows the bottom edge of the U-shaped bracket to be inserted through the notch and engage with the elongated through hole, thus enabling a detachable connection between the cutting table 2 and the mounting frame 1. This design facilitates the rapid assembly and disassembly of the cutting table 2, improving the maintainability of the equipment.

[0032] By setting a clearance notch and a U-shaped bracket snap-fit ​​structure, the installation process of the cutting table 2 is simplified, while ensuring connection reliability, enhancing the convenience of equipment maintenance and the efficiency of module replacement, and adapting to the high-frequency debugging needs in complex testing environments.

[0033] In one possible implementation, the transmission simulation mechanism includes multiple pulleys 6, a first belt 9, a second belt 10, a transition pulley 7, a motor 4, and a clutch 8. The clutch 8 and the transition pulley 7 are coaxially mounted on the mounting frame 1. The first belt 9 connects the transition pulley 7 to the output end of the motor 4, and the second belt 10 connects the clutch 8 to the multiple pulleys 6 to achieve transmission, thereby driving the cutter to work.

[0034] The motor 4 drives the transition wheel 7 on the mounting frame 1 to rotate via the first belt 9. The transition wheel 7 is linked with the second belt 10 via the coaxially mounted clutch 8, which transmits power to multiple distributed pulleys 6, thereby simulating the drive of the cutter and forming a power path similar to that in actual operation.

[0035] This structure simulates the transmission process in the actual operation of the cutting table 2, and can evaluate and verify the wear resistance of the belt, thereby improving the simulation accuracy and practicality of the test system.

[0036] In one possible implementation, the control mechanism includes an electrical control cabinet 5, an electric shock protection device, a voltage converter, and a time relay. The electric shock protection device is used to protect the motor 4 and the clutch 8. The voltage converter is used to convert the voltage of the clutch 8. The time relay controls the engagement interval of the clutch 8. The electrical control cabinet is used to control the motor 4 and the clutch 8.

[0037] The control system uses an electrical control cabinet as the central control unit, combined with an electric shock protector to ensure safe operation of the equipment. A voltage converter adjusts the power supply voltage to the voltage required by clutch 8, while a time relay precisely controls the working time interval of clutch 8. Motor 4 simulates a motor, and the time relay simulates manual mowing time, achieving simulated control of the cutter's working cycle.

[0038] This control system configuration enables the equipment to have good safety, controllability, and ease of debugging, effectively extending the service life of key components and ensuring reliable operation throughout the testing process.

[0039] In one possible implementation, the actuator of the height adjustment mechanism 3 is a linear telescopic cylinder 14.

[0040] The actuator adopts a linear telescopic cylinder 14, which is controlled by an air source to extend and retract, thereby applying force to the transmission mechanism connected to it to achieve the adjustment of the height of the cutting table 2.

[0041] Using a telescopic cylinder 14 as a power source has advantages such as fast response, high control precision, and compact structure, and is suitable for scenarios in the testing system where there are high requirements for height adjustment response time and adjustment range.

[0042] In one possible implementation, the transmission mechanism of the height adjustment mechanism 3 includes a rotating shaft 11, a connecting plate 12, a connecting rod 13, and a linkage mechanism. The rotating shaft 11 is rotatably connected to the mounting frame 1, and the axis of the rotating shaft 11 is parallel to the rotation center line of the cutting table 2. The connecting plate 12 is fixedly connected to the rotating shaft 11. One end of the connecting rod 13 is connected to the connecting plate 12, and the connection point is offset from the axis of the rotating shaft 11. The other end of the connecting rod 13 is connected to the head end of the cutting table 2, which is located on one side of the rotating shaft 11. The linkage mechanism is connected between the rotating shaft 11 and the actuator, and the actuator drives the rotating shaft 11 to rotate through the linkage mechanism.

[0043] In this structure, the actuator controls the linkage mechanism to rotate the rotating shaft 11. The connecting plate 12 is fixed on the rotating shaft 11, so that the connecting rod 13 drives one end of the cutting table 2 to move up and down during rotation, thereby realizing the adjustment of the angle and height control of the cutting table 2.

[0044] Through the mechanical design of the transmission structure, the angle and height of the cutting table 2 can be smoothly adjusted. The action is precise and the mechanism is compact, making it suitable for frequent adjustment operations in automated testing scenarios.

[0045] In one possible implementation, the linkage mechanism includes a first link 15, a second link 16, and a third link 17. The two ends of the second link 16 are rotatably connected to one end of the first link 15 and the third link 17, respectively. The other end of the first link 15 is connected to the telescopic end of the cylinder 14, and the other end of the third link 17 is fixedly connected to the rotating shaft 11.

[0046] The cylinder 14 extends and retracts, causing the first connecting rod 15 to move. Through the hinge structure formed by the second connecting rod 16 and the third connecting rod 17, the third connecting rod 17 drives the rotating shaft 11 to rotate, thereby indirectly controlling the angle and position of the cutting table 2 connected to the rotating shaft 11.

[0047] This multi-stage linkage design can effectively amplify the stroke of cylinder 14, improve the efficiency and adjustment range of action, while maintaining the system's responsiveness and stability, and enhancing the adjustment performance of the cutting table 2.

[0048] In one possible implementation, the linkage mechanism and cylinder 14 are located on the same side of the rotating shaft 11 as the cutting table 2.

[0049] The linkage mechanism and cylinder 14 are arranged on the same side as the cutting table 2;

[0050] Specifically, when the backward pulling force of the cylinder 14 is greater than the weight of the cutting table 2, the first connecting rod 15 and the second connecting rod 16 drive the third connecting rod 17 to rotate, which in turn drives the rotation, thereby raising the height of the cutting table 2 through the connecting plate 12 and the connecting rod 13; when the backward pulling force of the cylinder 14 is less than the weight of the cutting table 2, the cutting table 2 lowers its height under the influence of gravity, and at this time the cylinder 14 plays a buffering role.

[0051] The first link is used for the locking mechanism, the second link is used to connect the first link and the third link, and the third link is used to rotate the shaft.

[0052] This same-side arrangement reduces structural complexity, improves overall wiring simplicity and assembly convenience, and helps to reduce equipment size and improve maintenance efficiency.

[0053] It should be noted that the position of cylinder 14 and linkage mechanism can also be on the other side of rotating shaft 11 relative to the cutting table 2, that is, the two are on opposite sides. In this case, the force applied by cylinder 14 is the opposite thrust.

[0054] In one possible implementation, the height adjustment mechanism 3 further includes a locking mechanism, which includes a locking plate 23 and a handle 22. The locking plate 23 is fixedly sleeved on the outside of the handle 22, and the handle 22 is rotatably connected to the mounting frame 1. The edge of the locking plate 23 is provided with a plurality of slots 24 spaced apart circumferentially. The vertical distance from each slot 24 to the handle 22 is different. The side of the first connecting rod 15 is provided with a guide groove 19, and a guide member 18 is provided in the guide groove 19. The guide groove 19 and the guide member 18 are slidably engaged. The guide member 18 is fixed on the mounting frame 1. The first connecting rod 15 is provided with a snap-fit ​​part that engages with the slot 24.

[0055] Each slot 24 represents a certain height setting of the cutting platform 2. The cylinder 14 only exerts force to counteract the gravity of the cutting platform 2 during the process of raising the height of the cutting platform 2. In the subsequent maintenance, the gravity of the cutting platform 2 is counteracted by the locking mechanism. The slot 24 and the locking part on the first connecting rod 15 cooperate to limit the displacement of the first connecting rod 15, thereby limiting the movement of the entire linkage mechanism, thus ensuring that the rotating shaft 11 remains stable under the influence of gravity and keeping the height of the cutting platform 2 unchanged.

[0056] The specific operation is as follows: First, the cylinder 14 pulls the first connecting plate 12 backward, so that the clamping plate 23 is on the subsequent forward movement trajectory of the first connecting plate 12, while ensuring that the first connecting plate 12 does not interfere with the rotation of the clamping plate 23. Then, the clamping plate 23 is rotated to select a certain height position, the pulling force of the cylinder 14 retracting backward decreases, and the first connecting plate 12 moves forward until the connecting plate 12 engages with the clamping slot 24. At this time, the cylinder 14 stops exerting force, and the cutting table 2 remains at this height.

[0057] By setting multiple height positions in the slots 24, the positioning and locking of the linkage mechanism's action state can be achieved. Rotating the handle 22 controls the control plate 23 to engage with the corresponding slot 24, achieving mechanical limiting of the height position and enhancing stability and safety during adjustment.

[0058] The locking mechanism is reliable and has a quick positioning and fixing function, which avoids test errors or safety problems caused by the equipment sliding on its own after height adjustment, and improves the stability and service life of the equipment.

[0059] In one possible implementation, according to the test machine of claim 7, one end of a tension spring 20 is connected to the connecting plate 12, and the other end of the tension spring 20 is connected to the mounting bracket 1. The tension spring 20 is located on the other side of the rotating shaft 11 relative to the cutting table 2 and the linkage mechanism.

[0060] In this embodiment, a tension spring 20 is connected to the connecting plate 12 at one end, and the other end of the tension spring 20 is fixed to the mounting bracket 1 structure. The tension spring 20 is positioned on the opposite side of the rotating shaft 11 relative to the cutting table 2 and the linkage mechanism. During operation, the tension spring 20 helps to offset part of the gravitational influence, provides compensation for the cylinder 14, reduces the burden on the cylinder 14, and also acts as a buffer when the cutting table 2 descends, reducing load fluctuations in the actuator and extending the service life of key components.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test specific machine for a header, characterized in that, It includes a mounting frame, a cutting table, a height adjustment mechanism, a transmission simulation mechanism, and a control mechanism. One end of the cutting table is rotatably connected to the mounting frame. The height adjustment mechanism is used to adjust the height of the cutting table. The transmission simulation mechanism is used to simulate the transmission of the cutting table in the machine. The height adjustment mechanism includes an actuator and a transmission mechanism. The actuator acts on the other end of the cutting table through the transmission mechanism, causing the cutting table to rotate in a vertical plane around its connection with the mounting frame.

2. The test bench of claim 1, wherein, The cutting platform has a connecting part at the tail end and an elongated through hole on the side. A clearance notch is provided above the elongated through hole. A U-shaped bracket is provided on the mounting frame. The bottom edge of the U-shaped bracket is movably engaged with the elongated through hole through the clearance notch.

3. The test bench of claim 1, wherein, The transmission simulation mechanism includes multiple pulleys, a first belt, a second belt, a transition pulley, a motor, and a clutch. The clutch and the transition pulley are coaxially mounted on a mounting frame. The first belt connects the transition pulley to the output end of the motor, and the second belt connects the clutch to the multiple pulleys to achieve transmission, thereby driving the cutter to work.

4. The test bench of claim 1, wherein, The control mechanism includes an electrical control cabinet, an electric shock protection device, a voltage converter, and a time relay. The electric shock protection device is used to protect the motor and the clutch, the voltage converter is used to convert the clutch voltage, the time relay controls the interval between clutch engagement and disengagement, and the electrical control cabinet is used to control the motor and the clutch.

5. The test bench of claim 1, wherein, The transmission mechanism includes a rotating shaft, a connecting plate, a connecting rod, and a linkage mechanism. The rotating shaft is rotatably connected to the mounting frame, and the axis of the rotating shaft is parallel to the rotation center line of the cutting table. The connecting plate is fixedly connected to the rotating shaft. One end of the connecting rod is connected to the connecting plate, and the connection point is offset from the axis of the rotating shaft. The other end of the connecting rod is connected to the head end of the cutting table, which is located on one side of the rotating shaft. The linkage mechanism is connected between the rotating shaft and the actuator, and the actuator drives the rotating shaft to rotate through the linkage mechanism.

6. The test bench of claim 5, wherein, The actuator is a linear telescopic cylinder, and the linkage mechanism includes a third link. One end of the third link is fixedly connected to the rotating shaft, and the other end is rotatably connected to the telescopic end of the cylinder.

7. The test bench of claim 6, wherein, The linkage mechanism and cylinder are located on the same side of the rotating shaft as the cutting table.

8. The test bench of claim 7, wherein, The height adjustment mechanism also includes a locking mechanism, which includes a locking plate, a handle, and a first connecting rod. The locking plate is fixedly sleeved on the outside of the handle, and the handle is rotatably connected to the mounting bracket. The edge of the locking plate is provided with multiple slots spaced apart circumferentially, and the vertical distance from each slot to the handle is different. The first connecting rod is connected to the third connecting rod and the telescopic end of the cylinder at both ends, respectively. The first connecting rod is rotatably connected to the third connecting rod. The side of the first connecting rod is provided with a guide groove, and a guide component is provided in the guide groove. The guide groove and the guide component are slidably engaged. The guide component is fixed on the mounting bracket. The first connecting rod is provided with a snap-fit ​​part that engages with the snap-fit ​​groove.

9. The testing machine according to claim 8, characterized in that, A second link is provided between the first link and the third link, and the second link is rotatably connected to the third link.

10. The test bench of any of claims 5-9, wherein, One end of the connecting plate is connected to a tension spring, and the other end of the tension spring is connected to the mounting bracket. The tension spring is located on the other side of the rotating shaft relative to the cutting table and the linkage mechanism.

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