Emergency stop device for mountain farming machine

Abstract

The utility model relates to a sudden stop device for a mountain farming machine, and relates to the technical field of farming machines, the sudden stop device for the mountain farming machine comprises a locking assembly for locking a driving wheel shaft and a sudden stop button for controlling the locking assembly to start and stop, the sudden stop button has a self-locking property, and the locking assembly comprises a pressing block arranged on the farming machine in a sliding mode; the hydraulic cylinder is used for driving the pressing block to slide, and when the hydraulic cylinder drives the pressing block to abut against the side wall of the driving wheel shaft, abutting and locking are conducted on the driving wheel shaft; the controller is electrically connected with the scram button and controls the hydraulic cylinder to stretch out and draw back according to electric signals of the scram button. According to the technical scheme, after the scram button is pressed down, the scram button is self-locked, then the hydraulic cylinder is controlled by the controller to extend so as to drive the pressing block to abut against the driving wheel shaft and enable the driving wheel shaft to stop rotating, inertia slippage caused after traditional power is cut off is avoided, and the service life of the driving wheel shaft is prolonged. Therefore, the farming machine can be quickly stopped in emergency.

Description

Technical Field

[0001] This application relates to the technical field of agricultural machinery, and in particular to an emergency stop device for mountain agricultural machinery. Background Technology

[0002] In the complex terrain of mountainous areas, various unpredictable situations can arise, such as sudden load changes during high-speed driving, abrupt changes in speed, collisions with hard objects, accidents while reversing, or the operator suddenly stepping into a deep pit, all requiring an immediate shutdown of power. The best way to handle unexpected abnormal situations during operation is to stop the internal combustion engine's output, thus immediately halting power.

[0003] When a farm tiller needs to stop suddenly while moving forward or backward under normal use, it is usually done by disengaging the clutch and simultaneously closing the throttle. This cuts off the power source, causing the tiller to stop. However, although the tiller has no power output after the power source is cut off, it cannot stop quickly due to inertia. If this is not done in time, there is a high risk of injury. Utility Model Content

[0004] To facilitate the rapid stopping of agricultural machinery in emergency situations, this application provides an emergency stop device for mountain agricultural machinery.

[0005] The emergency stop device for mountain agricultural machinery provided in this application adopts the following technical solution:

[0006] An emergency stop device for a mountain agricultural tiller includes a locking assembly mounted on the tiller and locking the drive wheel axle, and an emergency stop button mounted on the tiller handle for controlling the start and stop of the locking assembly. The emergency stop button is self-locking. The locking assembly includes:

[0007] A clamping block, which is slidably disposed on the tiller in a direction close to or away from the drive wheel axle;

[0008] A hydraulic cylinder is installed on the agricultural tiller and is used to drive the pressing block to slide. When the hydraulic cylinder drives the pressing block to press against the side wall of the drive wheel shaft, it locks the drive wheel shaft.

[0009] A controller is installed on the agricultural machine and electrically connected to the emergency stop button. The controller controls the extension and retraction of the hydraulic cylinder according to the electrical signal from the emergency stop button.

[0010] By adopting the above technical solution, when the emergency stop button is pressed, the emergency stop button self-locks, and then the controller controls the hydraulic cylinder to extend, thereby driving the clamping block to press against the drive wheel shaft and stop the drive wheel shaft from rotating. This avoids the inertial slippage after cutting off the power, thus making it easier for the agricultural machine to stop quickly in an emergency.

[0011] Furthermore, the drive wheel shaft is provided with an emergency stop wheel that cooperates with the clamping block. The emergency stop wheel has multiple sets of V-shaped grooves on its circumference. The clamping block is provided with multiple sets of V-shaped protrusions that engage with the V-shaped grooves on the side near the emergency stop wheel.

[0012] By adopting the above technical solution, mechanical interlocking is provided through the geometric meshing between the V-groove and the V-protrusion, which reduces the mutual slippage between the clamping block and the drive wheel shaft when they are pressed together during high-speed braking, shortens the braking time, and improves emergency stop stability.

[0013] Furthermore, the agricultural tiller is equipped with two sets of clamping blocks and hydraulic cylinders. The two sets of clamping blocks are located on opposite sides of the drive wheel shaft. When the two sets of clamping blocks approach each other, they clamp and fix the drive wheel shaft.

[0014] By adopting the above technical solution, the symmetrical layout eliminates the uneven load on the drive wheel axle caused by unilateral force application, reduces the probability of complete deformation of the drive wheel axle, and improves the clamping force on the drive wheel axle.

[0015] Furthermore, the agricultural tiller is equipped with a hydraulic accumulator for increasing the extension speed of the hydraulic cylinder. The hydraulic accumulator is located at the oil inlet of the hydraulic cylinder and is used to directly supply oil when the hydraulic cylinder extends.

[0016] By adopting the above technical solution, when the hydraulic cylinder extends, oil is directly supplied through the hydraulic accumulator, which shortens the extension time of the hydraulic cylinder and facilitates the reduction of braking time.

[0017] Furthermore, the hydraulic accumulator is pre-charged to 10 MPa, and the controller releases the pre-charge pressure through the hydraulic accumulator when the hydraulic cylinder extends, which is then used to increase the extension speed of the hydraulic cylinder.

[0018] By adopting the above technical solution, the hydraulic accumulator is pre-charged to 10MPa, which facilitates the rapid extension of the hydraulic cylinder while reducing the probability of damage to the hydraulic accumulator.

[0019] Furthermore, the emergency stop wheel and the clamping block are both provided with anti-slip layers on their contact surfaces to increase surface hardness and friction.

[0020] By adopting the above technical solution, the anti-slip layer increases the coefficient of friction between the components, reduces the risk of slippage, and at the same time increases the hardness of the contact surface, extending the service life of the emergency stop wheel and the clamping block.

[0021] Furthermore, the controller is electrically connected to the power source and is used to cut off the power supply to the power source.

[0022] By adopting the above technical solution, the clamping block mechanically locks the drive wheel shaft while cutting off the power source, thus avoiding secondary dangers caused by the failure to cut off power during mechanical locking and braking.

[0023] Furthermore, the agricultural tiller is equipped with a reset button to facilitate the restoration of the locking component position. After the reset button is activated, the hydraulic accumulator is recharged. The reset button is electrically connected to the emergency stop button and can only be activated after the emergency stop button is reset.

[0024] By adopting the above technical solution, the reset button and the emergency stop button are linked to ensure that the device cannot be restarted before the emergency stop is lifted, thus improving operational safety.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] After pressing the emergency stop button, the button locks itself. Then, the controller controls the hydraulic cylinder to extend, and at the same time, the hydraulic accumulator is activated to accelerate the extension speed of the hydraulic cylinder. This drives the clamping block to press against the emergency stop wheel, and the interaction force of the V-groove and V-protrusion stops the drive wheel shaft from rotating, so that the agricultural machine can stop quickly in an emergency. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the emergency stop device for a mountain agricultural machine according to this application, which only shows part of the structure of the agricultural machine;

[0028] Figure 2 This is a side view of this application;

[0029] Figure 3 yes Figure 2 A magnified view of part A.

[0030] Reference numerals: 1. Drive wheel axle; 2. Locking assembly; 21. Pressing block; 211. V-shaped protrusion; 22. Hydraulic cylinder; 3. Emergency stop wheel; 31. V-groove; 4. Hydraulic accumulator. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0032] This application discloses an emergency stop device for mountain agricultural machinery.

[0033] Reference Figure 1 An emergency stop device for a mountain agricultural tiller includes a locking assembly 2 installed on the tiller and locking the drive wheel axle 1, and an emergency stop button installed on the tiller handle and used to control the start and stop of the locking assembly 2. The emergency stop button has self-locking properties.

[0034] Reference Figure 1The drive wheel axle 1 is used to drive the rollers of the tiller to rotate. The locking assembly 2 includes a pressing block 21, a hydraulic cylinder 22, and a controller. The pressing block 21 is slidably mounted on the tiller along the direction close to or away from the drive wheel axle 1. The hydraulic cylinder 22 is fixedly mounted on the tiller. The extension rod of the hydraulic cylinder 22 is fixedly connected to the pressing block 21. The hydraulic cylinder 22 is used to drive the pressing block 21 to slide. When the hydraulic cylinder 22 drives the pressing block 21 to press against the side wall of the drive wheel, the pressing block 21 and the drive wheel axle 1 are locked together, thereby locking the tiller. The controller is fixedly mounted on the tiller. The controller is electrically connected to the emergency stop button. The controller controls the extension and retraction of the hydraulic cylinder 22 according to the electrical signal given by the emergency stop button.

[0035] Reference Figure 2 and Figure 3 An emergency stop wheel 3, which cooperates with the clamping block 21, is fixedly installed on the drive wheel shaft 1. The axis of the emergency stop wheel 3 coincides with the axis of the drive wheel shaft 1. Multiple sets of V-grooves 31 are arranged in a circular array on the side of the emergency stop wheel 3 away from the axis. Multiple sets of V-shaped protrusions 211 are provided on the side of the clamping block 21 near the emergency stop wheel 3, which engage with the V-grooves 31. When the hydraulic cylinder 22 drives the clamping block 21 to slide closer to the drive wheel shaft 1, the V-shaped protrusions 211 enter the V-grooves 31, thereby preventing the emergency stop wheel 3 from rotating, so as to facilitate emergency stop control of the drive wheel shaft 1. In order to facilitate the mutual abutment and locking of the emergency stop wheel 3 and the clamping block 21, an anti-slip layer is provided on the mutual abutment surface of the emergency stop wheel 3 and the clamping block 21. The anti-slip layer is used to increase the contact surface between the emergency stop wheel 3 and the clamping block 21. In this embodiment, the anti-slip layer is made of tungsten carbide spraying.

[0036] Reference Figure 1 The agricultural tiller is equipped with two sets of clamping blocks 21 and hydraulic cylinders 22. The two sets of clamping blocks 21 and hydraulic cylinders 22 are located on opposite sides of the drive wheel shaft 1. The two sets of clamping blocks 21 move synchronously in the direction of approaching or moving away from each other. When the two sets of clamping blocks 21 approach each other, they clamp and fix the two ends of the drive wheel shaft 1, thereby improving the clamping and fixing effect of the drive wheel shaft 1.

[0037] Reference Figure 1 The agricultural tiller is equipped with a hydraulic accumulator 4, which is used to increase the extension speed of the hydraulic cylinder 22. The outlet of the hydraulic accumulator 4 is connected to the oil inlet of the hydraulic cylinder 22 when it extends. The hydraulic accumulator 4 is used to directly supply oil to the hydraulic cylinder 22 when it extends. Before use, the hydraulic accumulator 4 is pre-charged to 10MPa. When the controller controls the hydraulic cylinder 22 to extend, the pre-charged pressure is released through the hydraulic accumulator 4, so as to achieve the purpose of quickly pushing the hydraulic cylinder 22 to extend.

[0038] Reference Figure 1The controller is electrically connected to the power source of the agricultural machine. When the emergency stop button is pressed, the controller shuts off the power source, thereby ensuring that the power source of the agricultural machine is cut off and reducing the interaction force between the emergency stop wheel 3 and the clamping block 21 when they are pressed together.

[0039] Reference Figure 1 The agricultural tiller is equipped with a reset button for easy restoration of the locking assembly 2. After the reset mechanism is activated, the hydraulic accumulator 4 recharges, facilitating the reset of the tiller's emergency stop device. The reset button is electrically connected to the emergency stop button and can only be activated after the emergency stop button has been reset. Once the safety hazard is eliminated, the emergency stop button is rotated to release its self-lock and reset. After the emergency stop button has reset, pressing the reset button drives the hydraulic cylinder 22 to contract via the controller, causing the clamping block 21 to reset, and simultaneously resetting the hydraulic cylinder. The accumulator 4 is recharged to a pressure of 10MPa. The emergency stop button in this embodiment is provided with two sets of contacts, namely normally open contacts and normally closed contacts. When the emergency stop button is pressed, the normally closed contacts are connected, thereby providing an opening electrical signal to the controller. At the same time, when the emergency stop button is pressed, the normally open contacts are disconnected. The normally open contacts of the emergency stop button are electrically connected to the reset button. Therefore, the reset button can only be energized after the emergency stop button is reset. The normally open contacts of the reset button and the emergency stop button cooperate with each other to provide a reset electrical signal to the controller.

[0040] Reference Figure 1 The agricultural tiller is also equipped with an indicator light. The indicator light is red before the clamping block 21 is returned to its original position and the hydraulic accumulator 4 is recharged. The indicator light is green when the clamping block 21 is reset and the hydraulic accumulator 4 is recharged.

[0041] Reference Figure 1 and Figure 3 Specifically, when an unexpected situation occurs with the agricultural tiller and the emergency stop button is pressed, the emergency stop button locks itself. The controller switches the direction of hydraulic oil flow into and out of the hydraulic cylinder 22 via the reversing valve, thereby extending the hydraulic cylinder 22. At the same time, the hydraulic accumulator 4 is activated to accelerate the extension speed of the hydraulic cylinder 22, so that the hydraulic cylinder 22 can quickly drive the clamping block 21 to press against the emergency stop wheel 3. The interaction force of the V-groove 31 and the V-protrusion 211 stops the rotation of the drive wheel shaft 1. At the same time, the controller shuts off the power source, and the indicator light turns red. After the safety hazard is eliminated, the user turns the emergency stop button to release the self-lock and reset it. Then, the reset button is activated. The reset button causes the hydraulic cylinder 22 to shorten through the controller, thereby driving the clamping block 21 to reset. At the same time, the hydraulic accumulator 4 is recharged. When the clamping block 21 has been reset and the hydraulic accumulator 4 has been recharged, the indicator light turns green, thus completing the reset of the agricultural tiller.

[0042] The working principle of this application embodiment is as follows:

[0043] After pressing the emergency stop button, the emergency stop button self-locks, and then the controller controls the hydraulic cylinder 22 to extend. At the same time, the hydraulic accumulator 4 is activated to accelerate the extension speed of the hydraulic cylinder 22, thereby driving the clamping block 21 to press against the emergency stop wheel 3. The interaction force between the V-groove 31 and the V-protrusion 211 stops the drive wheel shaft 1 from rotating, so that the agricultural machine can stop quickly in an emergency.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hillside farming machine emergency stop device, characterized in that: The application relates to a locking assembly (2) arranged on a farm tiller and locking a driving wheel shaft (1), an emergency stop button arranged on a handle of the farm tiller and used for controlling the start and stop of the locking assembly (2), the emergency stop button having self-locking property, the locking assembly (2) comprising: a pressing block (21) arranged on the farm tiller and sliding towards or away from the driving wheel shaft (1); a hydraulic cylinder (22) arranged on the farm tiller and used for driving the pressing block (21) to slide, the hydraulic cylinder (22) abuttingly locking the driving wheel shaft (1) when the pressing block (21) is driven to abut against the side wall of the driving wheel shaft (1); a controller arranged on the farm tiller and electrically connected with the emergency stop button, the controller controlling the extension and retraction of the hydraulic cylinder (22) according to the electric signal of the emergency stop button.

2. The mountain farming machine emergency stop device according to claim 1, characterized in that: The driving wheel shaft (1) is provided with an emergency stop wheel (3) matched with the pressing block (21), a plurality of V-shaped grooves (31) are arranged on the circumference of the emergency stop wheel (3), and a plurality of V-shaped protrusions (211) matched with the V-shaped grooves (31) are arranged on the side of the pressing block (21) close to the emergency stop wheel (3).

3. The mountain farming machine emergency stop device according to claim 2, characterized in that: The farm tiller is provided with two groups of the pressing block (21) and the hydraulic cylinder (22), the two groups of the pressing block (21) are respectively arranged on the two sides of the driving wheel shaft (1), and the two groups of the pressing block (21) are close to each other and clamp and fix the driving wheel shaft (1).

4. The mountain farming machine emergency stop device according to claim 1, characterized in that: The farm tiller is provided with a hydraulic accumulator (4) used for improving the extension speed of the hydraulic cylinder (22), the hydraulic accumulator (4) is arranged on the oil inlet of the hydraulic cylinder (22) and directly supplies oil when the hydraulic cylinder (22) is extended.

5. The mountain farming machine emergency stop device according to claim 4, characterized in that: The pre-charged pressure in the hydraulic accumulator (4) is 10MPa, the controller controls the hydraulic accumulator (4) to release the pre-charged pressure and improve the extension speed of the hydraulic cylinder (22) when the hydraulic cylinder (22) is extended.

6. The mountain farming machine emergency stop device according to claim 2, characterized in that: The mutual abutting surfaces of the emergency stop wheel (3) and the pressing block (21) are respectively provided with anti-skid layers used for increasing the surface hardness and friction.

7. The mountain farming machine emergency stop device according to claim 1, characterized in that: The controller is electrically connected with a power source and used for cutting off the power supply of the power source.

8. The mountain farming machine emergency stop device according to claim 1, characterized in that: The farm tiller is provided with a reset key used for restoring the position of the locking assembly (2), the hydraulic accumulator (4) is recharged after the reset key is started, the reset key is electrically connected with the emergency stop button, and the reset key can be started only after the emergency stop button is reset.

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