Hooklift truck and safety operating system for hooklift truck

Abstract

The present invention provides a boom truck and a safety operating system for the boom truck. The boom truck includes a main boom hinged on a vehicle frame; a jib hinged on the main boom, which has a stowed state resting against the vehicle frame and an extended state away from the vehicle frame; a lifting cylinder for driving the jib; a sliding arm telescopically provided on the jib, which is suitable for engaging a garbage bin and has a stowed state retracted into the jib and an extended state extending from the jib; a support mechanism, which has an extended state suitable for supporting the vehicle frame and a stowed state unable to support the vehicle frame; and a quick connector, which has a connected state docking with an external connector of the garbage bin and a disconnected state detached therefrom. The safety operating system allows the lifting cylinder to operate only when either condition 1 or condition 2 is met: condition 1: the support mechanism is in the extended state, the sliding arm is in the extended state, and the quick connector is in the connected state; condition 2: the support mechanism is in the extended state and the sliding arm is in the stowed state.

Description

Technical Field

[0001] The present invention relates to the technical field of garbage transfer, and more particularly to a hook arm truck for transferring garbage bins and a safety operating system equipped on the hook arm truck. Background Art

[0002] A boom truck is a common vehicle used to transport garbage bins. Garbage bins are typically collected and compressed at a garbage transfer station. Once full, the truck transports the bin to a waste disposal facility (e.g., a landfill or incineration plant) and dumps the contents into a garbage pit. The truck then returns the empty bin to the garbage transfer station for further garbage collection and compression. During this process, the truck loads the bin by pulling it, tilts it to dump the garbage, and unloads it by placing it. Because garbage bins (especially when full) are heavy, conventional boom trucks require highly regulated operation by experienced operators. Inappropriate operation or errors can even cause the truck to flip over and fall into the garbage pit, posing a serious threat to the operator's safety and the safety of the truck's equipment. Consequently, conventional boom trucks and their operating methods rely heavily on the operator's experience and adherence to operating procedures.

[0003] Therefore, there is an urgent need in the art for a measure that can more reliably ensure the personal safety of operators and the equipment safety of boom trucks at the machine level. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, the present invention proposes a safe operating system for a boom truck, the boom truck comprising: a vehicle frame; a garbage bin operating mechanism, comprising: a main arm hinged on the vehicle frame; a lock box device provided on the main arm, which has a locked state for locking the garbage bin and an unlocked state for releasing the garbage bin; a secondary arm hinged on the main arm, which has a stowed state against the vehicle frame and an extended state away from the vehicle frame; a lifting cylinder for driving the secondary arm; a sliding arm telescopically provided on the secondary arm, which is suitable for engaging the garbage bin and has a stowed state retracted into the secondary arm and an extended state extended from the secondary arm. state; a sliding cylinder for driving the sliding arm; a support mechanism, which has an expanded state suitable for supporting the frame and a stowed state unable to support the frame; and a quick connector, which has a connected state docked with the external connector of the trash can and a disconnected state separated from the external connector of the trash can, wherein the safety operating system is configured to allow the lifting cylinder to operate only when condition 1 or condition 2 is met, and wherein condition 1 is: the support mechanism is in the expanded state, the sliding arm is in the expanded state, and the quick connector is in the connected state; condition 2 is: the support mechanism is in the expanded state, and the sliding arm is in the stowed state.

[0005] According to an optional embodiment of the present invention, the condition 1 is: the support mechanism is in an expanded state, the sliding arm is in an expanded state, the quick connector is in a connected state, and the lock box device is in a locked state.

[0006] According to an optional embodiment of the present invention, the condition 2 is: the support mechanism is in an extended state, the sliding arm is in a retracted state, and the quick connector is in a disconnected state.

[0007] According to an optional embodiment of the present invention, the condition 2 is: the support mechanism is in an extended state, the sliding arm is in a retracted state, the quick connector is in a disconnected state, and the lock box device is in an unlocked state.

[0008] According to an optional embodiment of the present invention, the safety operating system is configured to allow the sliding cylinder to operate only when condition 3 is met, and wherein condition 3 is: the support mechanism is in the deployed state, the quick connector is in the disconnected state, and the lock box device is in the unlocked state.

[0009] According to an optional embodiment of the present invention, the condition 3 is: the support mechanism is in an extended state, the quick connector is in a disconnected state, the lock box device is in an unlocked state, and the auxiliary arm is in a retracted state.

[0010] According to an optional embodiment of the present invention, the security operating system is configured to allow the lock box device to operate only when condition 4 is met, and wherein condition 4 is: the sliding arm is in the extended state and the auxiliary arm is in the retracted state.

[0011] According to an optional embodiment of the present invention, the safety operating system is configured to allow the support mechanism to operate only when condition 5 is met, and wherein condition 5 is: the sliding arm is in an extended state and the auxiliary arm is in a retracted state.

[0012] According to an optional embodiment of the present invention, the condition 5 is: the sliding arm is in an extended state, the auxiliary arm is in a retracted state, and the lock box device is in a locked state.

[0013] Also in order to solve the above-mentioned problems in the prior art, the present invention further proposes a hooklift, wherein the hooklift is equipped with the safety operating system as described herein.

[0014] The present invention can be embodied as the exemplary embodiments in the accompanying drawings. However, it should be noted that the drawings are merely exemplary and any changes conceivable under the teachings of the present invention should be considered to be included within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings illustrate exemplary embodiments of the present invention. These drawings should not be interpreted as necessarily limiting the scope of the present invention, in which:

[0016] Figure 1 is a schematic side view of a hooklift truck according to the present invention, wherein the waste container is in a flat position under the truck;

[0017] Figure 2 is a schematic perspective view of a hooklift truck according to the present invention, wherein the waste container is in a flat position under the truck;

[0018] Figure 3 is a schematic side view of a hooklift truck according to the present invention, wherein the waste container is in a flat position on the truck;

[0019] Figure 4 is a schematic side view of a hooklift truck according to the present invention, wherein the waste container is in an inclined position on the truck;

[0020] Figure 5 is a schematic diagram of the hydraulic system and safety operating system of a hooklift according to the present invention;

[0021] Figure 6 is a schematic flow chart of operations performed by a controller of a safety operating system according to the present invention before a lift cylinder is operated;

[0022] Figure 7 is a schematic flow chart of operations performed by the controller of the safety operating system according to the present invention before the sliding cylinder operates;

[0023] Figure 8 is a schematic flow chart of operations performed by a controller of a safety operating system according to the present invention before a lock box cylinder is operated; and

[0024] Figure 9 FIG. 4 is a schematic flow chart of operations performed by a controller of a safety operating system according to the present invention before a support cylinder is operated. DETAILED DESCRIPTION

[0025] Further features and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings. Exemplary embodiments of the present invention are shown in the accompanying drawings, and the various drawings are not necessarily drawn to actual scale. However, the present invention may be implemented in many different forms and should not be construed as necessarily being limited to the exemplary embodiments disclosed herein. On the contrary, these exemplary embodiments are merely provided to illustrate the present invention and to convey the spirit and essence of the present invention to those skilled in the art.

[0026] The present invention provides a boom truck and a safe operating system for a boom truck. When equipped with the safety operating system according to the present invention, even if the boom truck is operated by an inexperienced novice operator or the operator performs improper operation of the boom truck in violation of regulations, the boom truck can be reliably prevented from dangerous situations such as tipping over or falling into a pit. Therefore, compared to existing boom truck operation methods that require highly standardized operation by experienced operators, the safety operating system according to the present invention eliminates the high reliance on the operator's experience and the standardization of operation for the personal safety of the boom truck operator and surrounding personnel, as well as the safety of the boom truck itself, thereby significantly improving both personal and equipment safety. Furthermore, the safety operating system according to the present invention can reliably prevent damage to various operating mechanisms and waste bins on the boom truck, such as those caused by improper operation by the operator. Consequently, the maintenance cost of the boom truck is significantly reduced, and its service life is significantly increased. In particular, the safety operating system according to the present invention can also interact with the operator to allow the operator to understand the operation of the boom truck and guide the operator to perform standardized operations. As a result, the intelligence level of the boom truck is significantly improved, which also contributes to the improvement of the above-mentioned functions.

[0027] Various optional but non-limiting embodiments of the hooklift and its safety operating system according to the present invention are described in detail below with reference to the accompanying drawings.

[0028] refer to Figure 1-Figure 4 A hooklift according to the invention is described, wherein: Figure 1 A schematic side view of a hooklift according to the present invention is shown with the waste container in a flat position underneath the vehicle, Figure 2 A schematic perspective view of a hooklift truck according to the present invention is shown with a waste container in a flat position underneath the truck. Figure 3 shows a schematic side view of a hooklift according to the invention with the waste container in a flat position on the vehicle, and Figure 4 A schematic side view of a hooklift according to the invention is shown with the waste container in a tilted position on the vehicle.

[0029] like Figure 1-Figure 4 As shown, the hooklift 10 includes a frame 100, and a waste bin operating mechanism 200 and a support mechanism 300 mounted on the frame 100. As described below, the waste bin operating mechanism 200 can perform a series of operations on a waste bin 400, such as pulling the bin, placing the bin, and unloading the bin, while the support mechanism 300 can provide support to the frame 100 while the waste bin operating mechanism 200 performs these operations. It is also worth mentioning that, as a type of work vehicle, the hooklift according to the present invention has common vehicle functions, such as moving forward, backward, turning, and parking. For the sake of brevity, these common functions will not be described in detail herein.

[0030] like Figure 1-Figure 4 As shown, the trash bin operating mechanism 200 generally includes a main arm 201 hinged to the vehicle frame 100, a sub-arm 210 hinged to the main arm 201, a lifting cylinder 220 for driving the sub-arm 210 to rotate, a sliding arm 230 slidably (i.e., retractably) provided on the sub-arm 210, and a sliding cylinder 240 for driving the sliding arm 230 to slide. Specifically, the trash bin operating mechanism 200 is generally arranged above the vehicle frame 100, wherein one end (e.g., cylinder body) of the lifting cylinder 220 is hinged to the vehicle frame 100, and the other end (e.g., piston rod) thereof is hinged to the sub-arm 210. In this configuration, the sub-arm 210 can drive the sliding arm 230 to rotate together with the retractable movement of the piston rod of the lifting cylinder 220, so that the sub-arm 210 can be rotated between the storage state ( Figure 3 ) and the expanded state away from the frame 100 (as shown in Figure 1 、 Figure 2 and Figure 4 In particular, the auxiliary arm 210 in the deployed state can be switched as Figure 1 and Figure 2 By rotating relative to the main arm 201 and leaving the frame 100 as shown, it is also possible to Figure 4 As shown, the main arm 201 rotates together with the main arm 201 and leaves the vehicle frame 100. Figure 4 The expanded state shown is the same as Figure 1 and Figure 2The deployed state shown is different because the waste bin operating mechanism 200 further includes a lock mechanism 202 disposed on the main arm 201 for locking the waste bin 400. Specifically, the lock mechanism 202 includes a pair of spaced-apart locking hooks and a lock cylinder 203 for actuating the hooks. The lock cylinder 203 can drive the pair of locking hooks toward or away from each other to lock or unlock the waste bin 400. Once the lock mechanism 202 locks the waste bin 400, the waste bin 400 in turn locks the main arm 201, the auxiliary arm 210, and the sliding arm 230 together. At this point, the telescopic movement of the piston rod of the lift cylinder 220 is converted into rotation of the main arm 201, the auxiliary arm 210, the sliding arm 230, and the waste bin 400 relative to the vehicle frame 100. In short, if the lock box device 202 is in the unlocked state of releasing the trash box 400, the auxiliary arm 210 can rotate relative to the main arm 201. At this time, the telescopic movement of the piston rod of the lifting cylinder 220 can only drive the auxiliary arm 210 to rotate, but cannot drive the main arm 201 to rotate, that is, there will be Figure 1 and Figure 2 The main arm 201 is shown to be against the frame 100 and the auxiliary arm 210 is rotated relative to the main arm 201; on the contrary, if the lock box device 202 is in the locked state of locking the trash bin 400, the auxiliary arm 210 will be fixed together with the main arm 201. At this time, the telescopic movement of the piston rod of the lifting cylinder 220 will drive the auxiliary arm 210 to rotate together with the main arm 201, that is, there will be Figure 4 The main arm 201 and the auxiliary arm 210 are shown to rotate together relative to the vehicle frame 100 .

[0031] like Figure 1-Figure 4 As shown, the sliding arm 230 is generally L-shaped and has a longitudinal portion 231 inserted into the auxiliary arm 210 and slidable (i.e., telescopic) relative to the auxiliary arm 210, and a transverse portion 232 fixed to the longitudinal portion 231 and substantially perpendicular to the longitudinal portion 231. A sliding cylinder 240 is provided in the auxiliary arm 210, one end of which (e.g., a cylinder body) is fixed to the auxiliary arm 210, while the other end (e.g., a piston rod) is fixed to the longitudinal portion 231 of the sliding arm 230. In this configuration, the longitudinal portion 231 of the sliding arm 230 can drive the transverse portion 232 to slide relative to the auxiliary arm 210 as the piston rod of the sliding cylinder 240 telescopes, thereby allowing the sliding arm 230 to slide between a stored state (e.g., a state stored in the auxiliary arm 210) and a storage state (e.g., a state stored in the auxiliary arm 210) by sliding. Figure 1 and Figure 2 ) and the deployed state extending from the auxiliary arm 210 (as shown Figure 3 In particular, as shown Figure 2As shown, the waste bin operating mechanism 200 may include a pair of lifting cylinders 220 disposed on both sides of the auxiliary arm 210 , and a hook 233 for engaging the pull ring 401 of the waste bin 400 may be provided at the free end of the transverse portion 232 of the sliding arm 230 .

[0032] like Figure 1-Figure 4 As shown, the support mechanism 300 generally includes a swing arm 310 hinged to the vehicle frame 100, a roller 320 fixed to the free end of the swing arm 310, and a support cylinder 330 for driving the swing arm 310 to rotate. Specifically, one end of the support cylinder (e.g., the cylinder body) is hinged to the vehicle frame 100, while the other end (e.g., the piston rod) is hinged to the swing arm 310. Under this configuration, the swing arm 310 can drive the roller 320 to rotate relative to the vehicle frame 100 as the piston rod of the support cylinder moves in a telescopic manner. In particular, in the case of Figure 1 In the unfolded state shown, the swing arm 310 is in a vertical position and the roller 320 is close to the ground, thereby providing support to the frame 100, but may cause the boom truck 10 to be unable to travel normally; Figure 3 In the stowed state shown, the swing arm 310 is in a horizontal position and causes the roller 320 to be relatively far from the ground, thereby allowing the hooklift 10 to travel normally, but being unable to provide support for the vehicle frame 100 .

[0033] Based on the above description, the following describes in detail the various operations of the arm truck on the garbage bin. As mentioned above, the garbage bin operating mechanism 200 can pull the garbage bin 400, place the garbage bin, and unload the garbage bin. Specifically, the so-called pulling operation refers to moving the garbage bin 400 from the following position to the following position: Figure 1 and Figure 2 Move the vehicle to the flat position shown below. Figure 3 The operation of placing the trash can 400 horizontally on the vehicle shown in FIG. 1 is opposite to the operation of pulling the trash can 400. Figure 3 Move the vehicle to the flat position shown in the figure Figure 1 and Figure 2 The operation of the vehicle under the horizontal position shown in FIG, the so-called unloading operation refers to the garbage box 400 from the vehicle under the horizontal position as shown in FIG. Figure 3 Move the vehicle to the flat position shown in the figure Figure 4 The operation of the vehicle tilting position and then returning to the vehicle flat position is described in detail below with respect to how the waste bin operating mechanism 200 and the supporting mechanism 300 perform the above-mentioned various operations.

[0034] In order to load the garbage container 400 onto the hooklift 10, it is necessary to perform a box pulling operation. Of course, before performing the box pulling operation, it is assumed that the various mechanisms of the hooklift 10 are already in the state after the following step S205. The box pulling operation includes the following steps:

[0035] S101: Place the lock box device 202 in the unlocked state, place the sliding arm 230 in the stored state, and place the auxiliary arm 210 and the support mechanism 300 in the deployed state; during this step, the sliding arm 230 is retracted into the auxiliary arm 210, the main arm 201 remains against the frame 100, the auxiliary arm 210 rotates relative to the main arm 201 so as to extend the sliding arm 230 to the rear of the frame 100, and the support mechanism 300 can support the frame 100.

[0036] S102: Engage the hook 233 of the sliding arm 230 with the pull ring 401 of the trash can 400;

[0037] S103: placing the auxiliary arm 210 in the stowed state; during this step, the main arm 201 remains against the vehicle frame 100, and the auxiliary arm 210 rotates relative to the main arm 201 to pull the sliding arm 230 back onto the vehicle frame 100. The sliding arm 230 lifts the waste container 400 and pulls it onto the vehicle frame 100. At the same time, the support mechanism 300 can support the vehicle frame 100 to prevent the hooklift 10 from tipping over due to the pulling of the waste container 400; and

[0038] S104: The sliding arm 230 is placed in the extended state and the support mechanism 300 is placed in the retracted state; during this step, the sliding arm 230 is extended from the auxiliary arm 210, thereby driving the waste container 400 to move toward the front of the hooklift 10, and the support mechanism 300 is retracted to allow the hooklift 10 to travel normally.

[0039] S105: Locking the box locking device 202. After this step, the box locking device 202 locks the trash can 400, so that the main arm 201, the auxiliary arm 210, the sliding arm 230 and the trash can 400 as a whole are pressed against the frame 100 and can rotate relative to the frame 100.

[0040] In order to unload the waste container 400 from the hooklift 10, a container placement operation needs to be performed. Of course, before performing the container placement operation, it is assumed that the various mechanisms of the hooklift 10 are already in the state after the above step S105. The container placement operation includes the following steps:

[0041] S201: placing the locking device 202 in an unlocked state; after this step, the locking device 202 unlocks the waste bin 400, thereby allowing the main arm 201, the auxiliary arm 210 and the sliding arm 230 to move relative to each other.

[0042] S202: placing the sliding arm 230 in the stowed state and the supporting mechanism 300 in the deployed state; during this step, the sliding arm 230 will drive the waste container 400 to move toward the rear of the hooklift 10, and the supporting mechanism 300 can support the vehicle frame 100;

[0043] S203: Place the auxiliary arm 210 in the expanded state; during this step, the main arm 201 remains against the frame 100, the auxiliary arm 210 rotates relative to the main arm 201, thereby driving the sliding arm 230 to leave the frame 100, and the sliding arm 230 pushes the trash can 400 off the frame 100.

[0044] S204: Separate the hook 233 of the sliding arm 230 from the pull ring 401 of the trash can 400;

[0045] S205: The auxiliary arm 210 is placed in a stowed state, the sliding arm 230 is placed in an extended state, the support mechanism 300 is placed in a stowed state, and the lock box device 202 is placed in a locked state. During this step, the main arm 201 remains against the vehicle frame 100. The auxiliary arm 210 rotates relative to the main arm 201, driving the sliding arm 230 back to the vehicle frame 100. The sliding arm 230 extends from the auxiliary arm 210, and the support mechanism 300 is retracted to allow the hooklift 10 to travel normally.

[0046] As mentioned above, in the bin pulling operation and the bin placing operation, the steps performed by the trash bin operating mechanism 200 and the supporting mechanism 300 are substantially the same, and both involve the process of extending and then retracting the sliding arm 230 .

[0047] In order to discharge the garbage in the garbage bin 400 into a garbage pit for landfill or incineration, a discharge operation needs to be performed. Of course, before the discharge operation is performed, it is assumed that the various mechanisms of the hooklift 10 are already in the state after step S105. The discharge operation includes the following steps:

[0048] S301 : placing the support mechanism 300 in an unfolded state; after this step, the support mechanism 300 can provide support for the vehicle frame 100 .

[0049] S302: The auxiliary arm 210 is placed in the extended state and the rear door of the waste bin 400 is placed in the open state. During this step, the main arm 201, the auxiliary arm 210, the sliding arm 230, and the waste bin 400 rotate relative to the vehicle frame 100, thereby tilting the rear door of the waste bin 400 downward. The rear door cylinder 410 of the waste bin 400 opens the rear door, and the waste in the waste bin 400 can be discharged under the action of its own gravity. In particular, the rear door cylinder 410 of the waste bin 400 can be connected to the quick connector of the boom truck 10 via an external connector 420, so that the hydraulic system of the boom truck 10 supplies hydraulic oil to the rear door cylinder 410 of the waste bin 400. In this case, the external connector 420 of the waste bin 400 needs to be connected to the quick connector of the boom truck 10 after the bin is pulled, and disconnected from the external connector 420 of the waste bin 400 before the bin is released.

[0050] S303: Place the auxiliary arm 210 in the storage state and place the rear door of the trash bin 400 in the closed state; during this step, the main arm 201, the auxiliary arm 210, the sliding arm 230 and the trash bin 400 rotate together relative to the frame 100, thereby returning to the frame 100, and the rear door cylinder 410 of the trash bin 400 closes the rear door to prevent the remaining garbage, sewage, etc. from leaking out.

[0051] S304: placing the support mechanism 300 in the stowed state; after this step, the support mechanism 300 is stowed, thereby allowing the hooklift 10 to travel normally.

[0052] Although the above describes in detail the specific structure and operation of each mechanism of the boom truck 10, it will be understood by those skilled in the art that different structures and operations can be used to achieve the same function, and this obviously also falls within the scope of protection of the present invention. In addition, as can be seen from the foregoing, since the garbage bin 400 has a large weight, especially after being loaded with garbage, the rotation of the garbage bin 400 may cause the center of gravity of the entire boom truck 10 to shift backwards or even cause dangerous situations such as overturning and falling into a garbage pit. In order to avoid such dangerous situations, the boom truck 10 is equipped with a safety operating system according to the present invention. Figure 5-Figure 9 A secure operating system according to the present invention is described.

[0053] refer to Figure 5 , which shows a schematic diagram of the hydraulic system and safety operating system of the boom truck according to the present invention. Figure 5 As shown, the safety operating system 500 includes a controller 510 and a plurality of sensors connected to the controller 510, including: a first sensor 521 for detecting the state of the support mechanism 300; a second sensor 522 for detecting the state of the sliding arm 230; a third sensor 523 for detecting the state of the quick connector 250; a fourth sensor 524 for detecting the state of the lock box device 202; and a fifth sensor 525 for detecting the state of the auxiliary arm 210. In addition, as shown in FIG. Figure 5 As shown, the controller 510 is also connected to the reversing valve signals of each oil cylinder so as to realize the extension and retraction of the piston rod of the corresponding oil cylinder by controlling each reversing valve.

[0054] refer to Figure 6 , which shows a schematic flow chart of the operations performed by the controller before the lifting cylinder is actuated. The so-called "action" as the name implies refers to the actions performed by various cylinders, devices, mechanisms, etc. to change the current state. For example, the piston rod of the cylinder changes from an extended state to a retracted state, or from a retracted state to an extended state by performing an action. Figure 6 As shown, the controller 510 is configured to:

[0055] S601: Detecting the state of the support mechanism 300 through the first sensor 521. If the support mechanism 300 is in the extended state, executing step S602; if the support mechanism 300 is in the retracted state, prohibiting the lifting cylinder 220 from operating;

[0056] S602: Detecting the state of the sliding arm 230 through the second sensor 522. If the sliding arm 230 is in the extended state, executing step S603; if the sliding arm 230 is in the retracted state, allowing the lifting cylinder 220 to operate;

[0057] S603: Detect the state of the quick connector 250 through the third sensor 523. If the quick connector 250 is in the connected state, the lifting cylinder 220 is allowed to operate; if the quick connector 250 is in the disconnected state, the lifting cylinder 220 is prohibited from operating.

[0058] Under the above configuration, step S601 first confirms that the support mechanism 300 can provide support for the vehicle frame 100. Then, step S602 determines whether the operation to be performed is to pull or unload a container. If the operation to be performed is to pull or unload a container, since the support mechanism 300 can already provide support for the vehicle frame 100, the lifting cylinder 220 can be actuated to achieve the pulling or unloading operation without causing the vehicle frame 100 to tip over. If the operation to be performed is to unload a container, step S603 confirms that the quick connector 250 is connected, which means that the rear door of the waste bin 400 can be opened to discharge the garbage, and thus the lifting cylinder 220 can be actuated to achieve the unloading operation. It is worth noting that if the quick connector 250 is not connected, the rear door of the waste bin 400 cannot be opened. In this case, the operation of the lifting cylinder 220 may cause garbage to accumulate at the rear door of the waste bin 400, thereby shifting the center of gravity of the entire boom truck 10 and causing it to fall into the garbage pit. Therefore, the above configuration can reliably prevent the hooklift 10 from tipping over when performing any operation, thereby significantly improving the safety of the hooklift and personnel.

[0059] According to an optional embodiment of the present invention, the controller 510 is configured to execute step S604 before the lifting cylinder 220 is actuated, wherein step S603 is to: detect the state of the quick connector 250 by the third sensor 523; if the quick connector 250 is in the connected state, execute step S604; if the quick connector 250 is in the disconnected state, prohibit the lifting cylinder 220 from actuating;

[0060] S604: The fourth sensor 524 detects the state of the lock box device 202. If the lock box device 202 is in the locked state, the lift cylinder 220 is allowed to operate. If the lock box device 202 is in the unlocked state, the lift cylinder 220 is prohibited from operating.

[0061] Under the above configuration, after confirming in step S603 that the rear door of the waste bin 400 can be opened, confirming in step S604 that the waste bin 400 has been locked means that the main arm 201, auxiliary arm 210, sliding arm 230, and waste bin 400 can be lifted as a whole for unloading, thereby allowing the lifting cylinder 220 to operate. This prevents unloading operations from being performed when the waste bin 400 is unlocked, further improving the safety of the hooklift and personnel.

[0062] According to an optional embodiment of the present invention, the controller 510 is configured to execute step S605 before the lifting cylinder 220 is actuated, wherein step S602 is to: detect the state of the sliding arm 230 by the second sensor 522; if the sliding arm 230 is in the extended state, execute step S603; if the sliding arm 230 is in the retracted state, execute step S605;

[0063] S605: The state of the quick connector 250 is detected by the third sensor 523. If the quick connector 250 is in the connected state, the lifting cylinder 220 is prohibited from moving; if the quick connector 250 is in the disconnected state, the lifting cylinder 220 is allowed to move.

[0064] Under the above configuration, after confirming in step S602 that the operation to be performed is to pull or put the box, it is confirmed in step S605 that the quick connector 250 has been disconnected, and then the lifting cylinder 220 is allowed to operate to realize the pulling or putting operation; otherwise, if the quick connector 250 is still connected to the boom truck 10, then the pulling and putting operation may cause damage to the quick connector 250 or even the garbage bin 400 to overturn the boom truck 10 through the quick connector 250.

[0065] According to an optional embodiment of the present invention, the controller 510 is configured to execute step S606 before the lifting cylinder 220 is actuated, wherein S605 is to: detect the state of the quick connector 250 by the third sensor 523; if the quick connector 250 is in the connected state, prohibit the lifting cylinder 220 from actuating; if the quick connector 250 is in the disconnected state, execute step S606;

[0066] S606: The fourth sensor 524 detects the state of the lock box device 202. If the lock box device 202 is in the unlocked state, the lift cylinder 220 is allowed to operate. If the lock box device 202 is in the locked state, the lift cylinder 220 is prohibited from operating.

[0067] Under the above configuration, after confirming that the quick connector 250 has been disconnected in step S605, confirming that the locking device 202 is in the unlocked state in step S606, the lifting cylinder 220 is allowed to operate to realize the box pulling and box placing operations; otherwise, if the locking device 202 is in the locked state, then the box pulling and box placing operations may cause the trash can 400 and the locking device 202 to damage each other.

[0068] refer to Figure 7 , which shows a schematic flow chart of the operations performed by the controller before the sliding cylinder is actuated. Figure 7 As shown, the controller 510 is configured to:

[0069] S701: Detecting the state of the support mechanism 300 through the first sensor 521. If the support mechanism 300 is in the extended state, executing step S702; if the support mechanism 300 is in the retracted state, prohibiting the sliding cylinder 240 from moving;

[0070] S702: Detecting the state of the quick connector 250 through the third sensor 523. If the quick connector 250 is in the connected state, prohibiting the sliding cylinder 240 from moving; if the quick connector 250 is in the disconnected state, executing step S703;

[0071] S703: The fourth sensor 524 detects the state of the lock box device 202. If the lock box device 202 is in the unlocked state, the sliding cylinder 240 is allowed to move; if the lock box device 202 is in the locked state, the sliding cylinder 240 is prohibited from moving.

[0072] The sliding cylinder 240 is only used to translate the waste bin 400 during the pulling and unloading operations. Therefore, in the above configuration, the first step is to confirm in step S701 that the support mechanism 300 can support the frame 100 to prevent the hooklift 10 from tipping over during the translation of the waste bin 400. Furthermore, in combination with the above, it can be seen that according to the teachings of the present invention, before the lifting cylinder 220 and the sliding cylinder 240, which can move the waste bin 400, are allowed to operate, it is necessary to first ensure that the support mechanism 300 can support the frame 100. This ensures that the support mechanism 300 can support the frame 100 during any movement of the waste bin 400. Then, in step S702, it is confirmed that the quick connector 250 is disconnected to prevent damage to the quick connector 250 during the translation of the waste bin 400. Finally, in step S703, it is confirmed that the lock mechanism 202 has unlocked the waste bin 400 to prevent it from obstructing the operation of the sliding cylinder 240 and preventing damage to the lock mechanism 202 during the translation of the waste bin 400.

[0073] According to an optional embodiment of the present invention, the controller 510 is configured to execute step S704 before the sliding cylinder 240 is actuated, wherein step S703 is to: detect the state of the lock box device 202 by the fourth sensor 524; if the lock box device 202 is in the unlocked state, execute step S704; if the lock box device 202 is in the locked state, prohibit the sliding cylinder 240 from actuating;

[0074] S704: The state of the auxiliary arm 210 is detected by the fifth sensor 525. If the auxiliary arm 210 is in the retracted state, the sliding cylinder 240 is allowed to move; if the auxiliary arm 210 is in the extended state, the sliding cylinder 240 is prohibited from moving.

[0075] In this configuration, the sliding cylinder 240 is allowed to operate only when it is confirmed in step S704 that the auxiliary arm 210 is in the stored state, which enables the sliding arm 230 to be moved only when it is against the frame 100 (in the Figure 3 100) and cannot be moved when leaving the frame 100 (e.g., Figure 1 、 Figure 2 、 Figure 4 This further ensures the safety of the boom truck and personnel.

[0076] refer to Figure 8 , which shows a schematic flow chart of the operations performed by the controller before the lock box cylinder is actuated. Figure 8 As shown, the controller 510 is configured to:

[0077] S801: Detect the state of the sliding arm 230 through the second sensor 522. If the sliding arm 230 is in the extended state, execute step S802; if the sliding arm 230 is in the retracted state, prohibit the lock box cylinder 203 from operating.

[0078] S802: The state of the auxiliary arm 210 is detected by the fifth sensor 525. If the auxiliary arm 210 is in the retracted state, the lock box cylinder 203 is allowed to operate; if the auxiliary arm 210 is in the extended state, the lock box cylinder 203 is prohibited from operating.

[0079] In this configuration, the lock box cylinder 203 is allowed to operate only when it is confirmed in step S801 that the sliding arm 230 is in the extended state and in step S802 that the auxiliary arm 210 is in the retracted state, that is, only when the trash can 400 is placed flat on the frame 100 and is close to the front of the vehicle (in the state of the trolley). Figure 3 ), the lock box cylinder 203 can be activated to enable the lock box device 202 to lock or unlock the trash box 400, while when the trash box 400 is in other positions (for example, Figure 1 、 Figure 2 、 Figure 4 The locking box cylinder 203 cannot move, so that the locking box device 202 cannot switch between the locked state and the unlocked state. This can, for example, prevent the garbage bin 400 from being unlocked during unloading. Therefore, this configuration helps to protect the garbage bin 400 and the locking box device 202 and improve the safety of the boom truck and personnel.

[0080] refer to Figure 9 , which shows a schematic flow chart of the operations performed by the controller before the support cylinder is actuated. Figure 9 As shown, the controller 510 is configured to:

[0081] S901: Detecting the state of the sliding arm 230 through the second sensor 522. If the sliding arm 230 is in the extended state, executing step S902; if the sliding arm 230 is in the retracted state, prohibiting the support cylinder 330 from operating;

[0082] S902: The state of the auxiliary arm 210 is detected by the fifth sensor 525. If the auxiliary arm 210 is in the retracted state, the support cylinder 330 is allowed to move; if the auxiliary arm 210 is in the extended state, the support cylinder 330 is prohibited from moving.

[0083] In this configuration, the support cylinder 330 is allowed to operate only when it is confirmed in step S901 that the sliding arm 230 is in the extended state and in step S902 that the auxiliary arm 210 is in the retracted state, that is, only when the trash can 400 is placed flat on the frame 100 and is close to the front of the vehicle (in the state of the support cylinder 330). Figure 3 The support cylinder 330 can only be moved to switch the support mechanism 300 between the stowed state and the unfolded state, and when the trash bin 400 is in other positions (for example, Figure 1 、 Figure 2 、 Figure 4 The supporting cylinder 330 is prohibited from moving, so that the supporting mechanism 300 cannot switch between the stowed state and the deployed state. This can prevent the supporting mechanism 300 from being switched to the stowed state when pulling boxes, putting boxes down, or unloading materials, thereby causing the frame 100 to lose support. Therefore, this configuration helps to further improve the safety of the boom truck and personnel.

[0084] According to an optional embodiment of the present invention, the controller 510 is configured to execute step S903 before the supporting cylinder 330 is actuated, wherein step S902 is to: detect the state of the auxiliary arm 210 by the fifth sensor 525; if the auxiliary arm 210 is in the retracted state, execute step S903; if the auxiliary arm 210 is in the extended state, prohibit the supporting cylinder 330 from actuating;

[0085] S903: The fourth sensor 524 detects the state of the lock box device 202. If the lock box device 202 is in the unlocked state, the support cylinder 330 is prohibited from moving. If the lock box device 202 is in the locked state, the support cylinder 330 is allowed to move.

[0086] Under this configuration, the support cylinder 330 is allowed to operate only after the locking device 202 locks the trash bin 400, so as to switch the support mechanism 300 from the deployed state to the retracted state. That is to say, the support mechanism 300 is allowed to stop providing support to the frame 100 only after the locking device 202 locks the trash bin 400, thereby further improving the safety of the boom truck and personnel.

[0087] In particular, an additional sensor may be provided on the vehicle frame 100, the additional sensor may be positioned near the front of the vehicle, and may be configured to detect when the auxiliary arm 210 is in the stowed state and the sliding arm 230 is in the deployed state ( Figure 3 The stowed state of the auxiliary arm 210 and the unfolded state of the sliding arm 230 can be detected simultaneously by a single additional sensor, which enables the above steps S801 and S802, S901 and S902 to be completed in a single step respectively.

[0088] It should be pointed out that the above description of performing various tests or judgments in different steps in a specific order is intended to make the technical solution of the present invention easier to understand. However, those skilled in the art will understand that these tests or judgments can obviously be performed in any order in the same step or in different combinations of steps, and this obviously also falls within the scope of protection of the present invention.

[0089] Finally, the safety operating system according to the present invention may also include a human-machine interaction device (for example, a display screen, audio, etc.), which allows the operator to understand the status of various mechanisms on the boom truck in real time, and can inform the operator of the reasons for prohibiting the movement of various cylinders when the movement is prohibited, so as to guide the operator to remove obstacles and enable the cylinders to move smoothly.

[0090] The above describes in detail, with the aid of the accompanying drawings, an optional but non-limiting embodiment of a hooklift and a safety operating system for a hooklift according to the present invention. It will be apparent to those skilled in the art that modifications and additions to the techniques and structures, as well as recombinations of features in the various embodiments, without departing from the spirit and substance of this disclosure, are within the scope of this invention. Therefore, all such modifications and additions that are conceivable under the teachings of this invention are considered part of this invention. The scope of this invention includes both known equivalent technologies as of the filing date of this application and unforeseen equivalent technologies.

Claims

1. A safe operating system for a hooklift, the hooklift comprising: Frame; The trash bin operating mechanism comprises: a main arm hinged on the vehicle frame; a lock bin device provided on the main arm, which has a locked state for locking the trash bin and an unlocked state for releasing the trash bin; a sub-arm hinged on the main arm, which has a stowed state against the vehicle frame and an extended state away from the vehicle frame; a lifting cylinder for driving the sub-arm; a sliding arm telescopically provided on the sub-arm, which is suitable for engaging the trash bin and has a stowed state retracted into the sub-arm and an extended state extended from the sub-arm; a sliding cylinder for driving the sliding arm; a support mechanism having an expanded state adapted to support the frame and a stowed state unable to support the frame; and The quick connector has a connection state in which it is docked with an external connector of a garbage bin and a disconnection state in which it is separated from the external connector of the garbage bin, and is characterized in that: The safety operating system includes a controller and a plurality of sensors connected to the controller by signal, the plurality of sensors including a first sensor for detecting the state of the support mechanism, a second sensor for detecting the state of the sliding arm, a third sensor for detecting the state of the quick connector, a fourth sensor for detecting the state of the lock box device, and a fifth sensor for detecting the state of the auxiliary arm, and the safety operating system is configured to allow the lifting cylinder to operate only when condition 1 or condition 2 is met, wherein, Condition 1 is: the support mechanism is in an expanded state, the sliding arm is in an expanded state, and the quick connector is in a connected state; and Condition 2 is: the support mechanism is in the extended state, and the sliding arm is in the retracted state.

2. The secure operating system according to claim 1, wherein: The condition 1 is: the support mechanism is in an expanded state, the sliding arm is in an expanded state, the quick connector is in a connected state, and the lock box device is in a locked state.

3. The secure operating system according to claim 1 or 2, wherein: The condition 2 is that the support mechanism is in an extended state, the sliding arm is in a retracted state, and the quick connector is in a disconnected state.

4. The secure operating system according to claim 3, wherein: The condition 2 is that the support mechanism is in the extended state, the sliding arm is in the retracted state, the quick connector is in the disconnected state, and the lock box device is in the unlocked state.

5. The secure operating system according to any one of claims 1 to 4, wherein: The safety operating system is configured to allow the sliding cylinder to operate only when condition 3 is satisfied, and wherein, Condition 3 is: the support mechanism is in the deployed state, the quick connector is in the disconnected state, and the lock box device is in the unlocked state.

6. The secure operating system according to claim 5, wherein: The condition 3 is: the support mechanism is in the deployed state, the quick connector is in the disconnected state, the lock box device is in the unlocked state, and the auxiliary arm is in the retracted state.

7. The secure operating system according to any one of claims 1 to 6, wherein: The secure operating system is configured to allow the lock box device to operate only when condition 4 is satisfied, and wherein, Condition 4 is that the sliding arm is in the extended state, and the auxiliary arm is in the retracted state.

8. The secure operating system according to any one of claims 1 to 7, wherein: The safety operating system is configured to allow the support mechanism to operate only when condition 5 is satisfied, and wherein, Condition 5 is: the sliding arm is in the extended state, and the auxiliary arm is in the retracted state.

9. The secure operating system according to claim 8, wherein: The condition 5 is that the sliding arm is in the extended state, the auxiliary arm is in the retracted state, and the lock box device is in the locked state.

10. A hook truck, characterized in that: The hooklift truck is equipped with a safety operating system according to any one of claims 1-9.

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