RGV lift capable of automatically identifying height and lifting method thereof

Abstract

The application relates to the elevator technical field, in particular to an RGV elevator capable of automatically identifying height and a lifting method thereof, which comprises a current collector arranged on a workbench, a moving mechanism, a bearing mechanism and a detection device, the bearing mechanism and the detection device are both arranged above the moving mechanism, and a protection mechanism for protecting the bearing mechanism is arranged on the moving mechanism; the protection mechanism is composed of a guide seat, a locking assembly and a connecting rod, wherein the guide seat is fixed in the moving mechanism, and one end of the connecting rod is connected with the locking assembly; the locking assembly comprises a shell, a locking piece one and a locking piece two, and one end of the connecting rod is fixed with the top side of the shell. The RGV elevator capable of automatically identifying height can realize double braking by triggering the locking assembly in the protection mechanism instantaneously when abnormally falling, so that the smoothness during normal work is ensured, and the safety and reliability of the equipment are greatly improved.

Description

Technical Field

[0001] This application relates to the field of elevator technology, and in particular to an RGV elevator with automatic height recognition and its lifting method. Background Technology

[0002] Guided rail vehicles (RGVs) are increasingly widely used as key conveying equipment in flexible production lines and automated warehousing systems. RGVs typically run along fixed tracks and integrate lifting mechanisms to achieve automated loading, unloading, and transfer of materials between workstations at different heights. Currently, common RGV lifting equipment mainly uses lead screws, chains, or hydraulic cylinders as lifting drive elements, and employs encoders, limit switches, or laser rangefinders for height positioning. However, most RGV lifts only have mechanical limit switches or electrical overload protection, lacking dedicated and reliable fall protection devices to prevent accidental falls caused by drive failure, hydraulic leakage, lead screw nut wear, or control system malfunctions.

[0003] To mitigate the aforementioned risks, some existing equipment incorporates a synchronously lifting buffer bar at the bottom of the material pallet. This buffer bar rises and falls with the carrying platform. When the carrying platform experiences slight loosening or a small drop due to drive clearance, the buffer bar contacts the bottom structure first, providing cushioning and shock absorption to prevent rigid impacts. However, the buffer bar can only handle slow displacement or minor loosening; it is essentially a passive buffer element, not an active locking mechanism. In the event of a complete drive failure, sudden hydraulic pressure loss, or screw nut disengagement, the carrying platform will rapidly accelerate and fall under gravity. In this case, the limited stroke and cushioning capacity of the buffer bar are far from sufficient to prevent the fall, let alone provide reliable braking. Furthermore, as the carrying platform rises, the support force required by the lifting structure increases significantly. The inertial impact generated by movement on the track, as well as the dynamic load impact of the material on the carrying platform during unloading, will induce additional vibrations in the carrying platform and lifting mechanism. Especially when carrying heavy materials, the carrying platform may slowly slide down under gravity, causing a height position deviation and affecting docking accuracy. Therefore, an RGV lifting machine with automatic height recognition and its lifting method are proposed to address the aforementioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies and improve load-bearing safety, this application provides an RGV lift with automatic height recognition and its lifting method, which has advantages such as high efficiency and dual fall protection, thus solving the aforementioned problems.

[0005] This application provides an RGV lift that automatically identifies height, employing the following technical solution:

[0006] An RGV lift with automatic height recognition includes a current collector, a moving mechanism, a load-bearing mechanism, and a detection device mounted on a workbench. The load-bearing mechanism and the detection device are both mounted above the moving mechanism, and the moving mechanism is provided with a protection mechanism to protect the load-bearing mechanism.

[0007] The protection mechanism consists of a guide seat, a locking assembly, and a connecting rod. The guide seat is fixed inside the moving mechanism, and one end of the connecting rod is connected to the locking assembly.

[0008] The locking assembly includes a housing, a locking component one, and a locking component two. One end of the connecting rod is fixed to the top side of the housing. The locking component one and the locking component two are used in cooperation with each other, and a pushing assembly is provided between them for linkage cooperation.

[0009] The locking component includes a sliding block 1 and a sliding block 2 that are slidably engaged, and a locking block 2 that slides through the interior of the housing. A limit spring is fixed between the locking block 2 and the sliding block 1. Several locking blocks 1 that are engaged with the locking blocks 2 are fixed on the outer wall of the guide seat. The housing is slidably connected to the guide seat.

[0010] Optionally, the moving mechanism includes a bottom support platform, four wheels rotatably mounted on the bottom support platform, and a lifting structure mounted on the bottom support platform. A connecting seat is provided between the lifting structure and the support mechanism, and an electrical control box is installed on the outer wall of the bottom support platform.

[0011] Optionally, the supporting mechanism includes a top supporting platform, a plurality of conveying rollers rotatably mounted on the top supporting platform, and a driving structure disposed inside the top supporting platform for driving the plurality of conveying rollers. The bottom side of the top supporting platform is bolted to the connecting seat, and the detection device is detachably installed on one side of the top supporting platform.

[0012] Optionally: There are two guide seats, which are symmetrically distributed between the housings and their bottom bolts are fixed to the bottom wall of the bottom support platform. The top of the connecting rod abuts against the bottom side of the connecting seat.

[0013] Optionally: The interior of the housing is hollow, and telescopic holes are provided on the outer walls of opposite sides. There are two slide blocks, which are symmetrically distributed. The opposite sides of the two slide blocks are provided with matching push slopes on the left and right sides of the slide block. The slide block is driven to move down by the connecting rod. The two slide blocks move synchronously by the squeezing of the push slopes, thereby locking the locking block.

[0014] Optionally: a limiting platform is fixed on the inner wall of the housing, and the bottom sides of the two slide blocks are slidably connected to the limiting platform; the locking member also includes two lifting platforms, and push rods are hinged between the two lifting platforms and the two slide blocks, wherein the lifting platforms are located in front of the slide blocks.

[0015] Optionally, the pushing assembly includes two connecting plates, with a connecting rod fixed between the two connecting plates. The connecting rod is elastically connected to the inner wall of the housing. The bottom connecting plate is located inside the housing and above the lifting platform. When the slide moves, the lifting platform moves accordingly and first contacts the inner wall of the housing. As the slide continues to move, the lifting platform moves upward through the push rod, causing it to drive the pushing assembly to work.

[0016] Optionally, the second locking component includes a mounting base fixed to the top side of the housing, a guide seat sleeved on the outer surface of the mounting base, and an elastic block fixed to the top side of the mounting base. The inner side of the elastic block is detachably fitted with a fitting block adapted to the shape of the connecting rod, and the guide seat is fixed to the top connecting plate.

[0017] Optionally: The outer side of the elastic block and the inner side of the guide seat are provided with matching extrusion slopes, the connecting rod passes through the interior of the mounting seat, and there are four elastic blocks, which are distributed in a rectangular shape.

[0018] Another problem that this invention also needs to solve is to provide a lifting method for an RGV lift that automatically identifies its height, comprising the following steps:

[0019] Step 1: Device Start-up and Motion Positioning

[0020] First, the traveling wheels in the moving mechanism are rotated by the electrical control box, moving the RGV elevator to the designated work position on the workbench. The current collector draws power from the sliding contact line of the rail to power the whole machine.

[0021] Step Two: Altitude Recognition and Signal Transmission

[0022] The detection equipment installed on one side of the top support platform automatically identifies the height of the material above the support mechanism or the target loading and unloading height, and transmits the height signal to the electrical control box in real time.

[0023] Step 3: The lifting mechanism drives the lifting of the load-bearing platform.

[0024] Then, the electrical control box controls the lifting structure to move according to the received height signal. The lifting structure drives the load-bearing mechanism and detection equipment to rise or fall through the connecting seat. At the same time, it drives the connecting rod to slide along the guide seat, so that the connecting rod is always below the load-bearing mechanism to maintain a safe distance.

[0025] Step 4: Standby state of the protection mechanism during normal lifting process

[0026] At normal lifting speed, the second locking block in the locking component 1 is kept retracted into the housing under the action of the limit spring, and the second locking block does not contact the first locking block on the guide seat; the elastic block in the locking component 2 remains in a relaxed state, the contact block does not clamp with the connecting rod, and the protection mechanism rises and falls freely with the bearing mechanism.

[0027] Step 5: Trigger the first braking action during an abnormal fall.

[0028] When the lifting structure malfunctions, causing the load-bearing mechanism to fall abnormally and rapidly, the connecting seat drives the connecting rod to move rapidly downward relative to the housing. At this time, the housing stops moving when it contacts the top of the buffer rod, while the connecting rod continues to move downward due to gravity. The connecting rod pushes the slide block two in the locking assembly downward through the connecting rod. The pushing ramps on the left and right sides of the slide block two press against the pushing ramps on the opposite sides of the two slide blocks one, causing the two slide blocks one to slide horizontally in opposite directions along the limiting platform. While the slide blocks one are moving horizontally, the lifting platform is pushed upward through the hinged push rod. The lifting platform contacts and drives the connecting plate at the bottom of the pushing assembly. The connecting plate at the bottom drives the connecting plate at the top to move upward through the connecting rod. The connecting plate at the top drives the guide seat in the locking component two to move upward along the outer surface of the mounting base. The pressing ramp on the inner side of the guide seat presses against the pressing ramp on the outer side of the elastic block, causing the four rectangularly distributed elastic blocks to contract inward. The fitting block on the inner side of the elastic block tightly clamps the connecting rod, achieving the first braking and preventing the connecting rod from falling rapidly.

[0029] Step Six: Achieve Secondary Braking

[0030] After the first braking by locking component two, the descent speed slows down. At this time, the displacement of slide one will compress the limiting spring and press against the locking block two, so that the locking block two and the locking blocks one evenly distributed on the outer wall of the guide seat form a one-way engagement, preventing the housing and the connected connecting rod, connecting seat and bearing mechanism from continuing to slide down, thus achieving secondary braking.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. This invention, by setting up detection equipment in conjunction with an electrical control box, can automatically identify the height of materials or targets and adjust the position of the bearing mechanism without the need for manual measurement and intervention, thus significantly improving the automation level and operational efficiency of material handling.

[0033] 2. This invention, by setting a locking component in the protection mechanism, does not generate any resistance to movement during normal lifting and lowering, but can be triggered instantly in case of abnormal fall, achieving dual braking, which not only ensures the smoothness during normal operation, but also greatly improves the safety and reliability of the equipment.

[0034] 3. In this invention, the locking component one adopts a cooperative structure of slide one, slide two and pushing inclined surface, which transforms the rapid downward movement of the connecting rod into the horizontal extension of the locking block two. By utilizing the one-way engagement of the locking block two with multiple locking blocks one on the guide seat, not only is the locking function realized, but also the limiting spring can be used to ensure that the locking block two is always in contact with the locking block one, so as to realize the detection of the locking component one.

[0035] 4. In this invention, the second locking component is linked with the first locking component by pushing the component. At the same time as triggering the elastic block to clamp the connecting rod, it automatically triggers the locking brake to achieve a second friction braking. Through the combined action of dual protection, it ensures that the elevator can be reliably stopped in the event of an abnormal fall, greatly enhancing the protection capability. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of this application;

[0037] Figure 2 This is a schematic diagram of a partial structure of this application;

[0038] Figure 3 This is a schematic diagram of a partial structure of this application;

[0039] Figure 4 This is a schematic diagram of the structure of the bottom support platform of this application;

[0040] Figure 5 This is a schematic diagram of the structure of the organization protected by this application;

[0041] Figure 6 This is a cross-sectional view of the structure of the organization protected by this application;

[0042] Figure 7 This is a cross-sectional view of the locking component of this application;

[0043] Figure 8 This is a cross-sectional view of the locking component and the pushing component of this application;

[0044] Figure 9 This application Figure 7 A magnified structural diagram of structure A is shown below;

[0045] Figure 10 This is a schematic diagram of the wedge block structure described in this application;

[0046] Figure 11 This is a structural schematic diagram of the wedge block from another perspective, as described in this application.

[0047] Figure label:

[0048] 1. Workbench; 11. Current collector; 2. Moving mechanism; 21. Bottom support platform; 22. Traveling wheels; 23. Lifting structure; 24. Connecting seat; 3. Supporting mechanism; 31. Top support platform; 32. Conveying rollers; 33. Drive structure; 4. Testing equipment; 5. Electrical control box; 6. Protection mechanism; 61. Guide seat; 611. Snap-fit ​​block one; 62. Locking assembly; 621. Housing; 6211. Limiting platform; 6212. Telescopic hole; 622. Locking element 6221. Slide 1; 6222. Slide 2; 6223. Snap-fit ​​Block 2; 6224. Limit Spring; 6225. Lifting Platform; 6226. Push Rod; 6227. Wedge Block; 6228. Wedge Surface; 623. Locking Component 2; 6231. Mounting Base; 6232. Guide Seat; 6233. Elastic Block; 6234. Adhesive Block; 6235. Extrusion Inclined Surface; 63. Connecting Rod; 64. Push Assembly; 641. Connecting Plate; 642. Connecting Rod. Detailed Implementation

[0049] The following is in conjunction with the appendix Figure 1 - Figure 9 This application will be described in further detail.

[0050] Example 1, as Figure 1 - Figure 9 As shown, this is the first embodiment of the present invention, which provides an RGV lifting platform with automatic height recognition. It includes a current collector 11, a moving mechanism 2, a supporting mechanism 3, and a detection device 4 mounted on a workbench 1. The supporting mechanism 3 and the detection device 4 are both installed above the moving mechanism 2. The moving mechanism 2 is equipped with a protection mechanism 6 to protect the supporting mechanism 3. This structure draws power from the current collector 11 and the track sliding contact line, ensuring stable power supply for the entire machine. Simultaneously, the protection mechanism 6 is integrated inside the moving mechanism 2, enabling timely braking in case of abnormal falls, significantly improving the safety of equipment operation.

[0051] Specifically, such as Figure 2 - Figure 4 As shown, the moving mechanism 2 includes a bottom support platform 21, four wheels 22 rotatably mounted on the bottom support platform 21, and a lifting structure 23 mounted on the bottom support platform 21. A connecting seat 24 is provided between the lifting structure 23 and the support mechanism 3. An electrical control box 5 is installed on the outer wall of the bottom support platform 21. Figure 2 As shown, the supporting mechanism 3 includes a top supporting platform 31, a plurality of conveying rollers 32 rotatably mounted on the top supporting platform 31, and a drive structure 33 disposed inside the top supporting platform 31 for driving the plurality of conveying rollers 32. The bottom side of the top supporting platform 31 is bolted to the connecting seat 24; Figure 1As shown, the detection device 4 is detachably installed on one side of the top support platform 31. It should be noted that the moving mechanism 2 integrates walking, lifting, and material conveying functions. The detachable installation of the detection device 4 facilitates maintenance or replacement of sensors of different accuracies. The connecting seat 24 uses bolt connections to ensure the robustness and ease of assembly / disassembly between the support mechanism 3 and the lifting structure 23. Furthermore, the bottom support platform 21 has a rectangular hollow structure, which reduces the overall weight of the equipment and facilitates the storage of wiring and the protection mechanism 6. It should be noted that, as... Figure 5 As shown, a buffer rod is provided on the inner bottom wall of the bottom support platform 21. The buffer rod moves up and down with the moving mechanism 2 to protect the moving mechanism 2 when it falls. In addition, the buffer material of the buffer rod depends on factors such as the working speed of the equipment, the load weight, the accuracy requirements and the usage environment. Since the falling speed of the moving mechanism 2 is greater than the downward movement speed of the buffer rod, the protection mechanism 6 can be triggered by the buffer rod when the moving mechanism 2 falls.

[0052] like Figure 4 - Figure 9 As shown, the protection mechanism 6 in this embodiment consists of a guide seat 61, a locking component 62, and a connecting rod 63. The guide seat 61 is fixed inside the moving mechanism 2, and one end of the connecting rod 63 is connected to the locking component 62. Specifically, there are two guide seats 61, which are symmetrically distributed between the housing 621, and their bottom sides are bolted to the inner bottom wall of the bottom support platform 21. The top end of the connecting rod 63 abuts against the bottom side of the connecting seat 24. This symmetrical arrangement of the guide seats 61 provides a smooth sliding path for the locking component 62. The top end of the connecting rod 63 directly abuts against the bottom side of the connecting seat 24, ensuring that any lifting or lowering movement of the connecting seat 24 can be transmitted to the locking component 62 in real time, improving the response speed of the trigger braking. At the same time, the connecting rod 63 can be connected to the lifting structure 23 through a connecting rod to achieve synchronous lifting and lowering, so that the connecting rod 63 is always located below the support mechanism 3, maintaining a safe distance. It should be noted that there are multiple protection mechanisms 6, and the number and position of the protection mechanisms 6 are set according to the distribution of the lifting structure 23.

[0053] like Figure 5 - Figure 8 As shown, the locking assembly 62 includes a housing 621, a first locking member 622, and a second locking member 623. One end of the connecting rod 63 is fixed to the top side of the housing 621. The first locking member 622 and the second locking member 623 cooperate with each other, and a pushing assembly 64 is provided between them for linkage. Figure 9As shown, the interior of the housing 621 is hollow, and telescopic holes 6212 are provided on the outer walls of opposite sides for extending and retracting the second locking block 6223, and also for guiding the second locking block 6223. It should be noted that the connecting rod 63 can be installed in two ways: one is connected to the lifting structure 23, and the other is connected to the bottom side of the top support platform 31. During installation, the housing 621 can be adjusted in position along the guide seat 61 and then fixed, and the lifting and lowering can be adjusted via the connecting rod 63. It should be noted that the distance between two adjacent locking blocks 611 must be less than or equal to the maximum allowable safe fall braking distance. When the maximum distance is limited, it is the limit of the fall travel that the housing 621 can allow before the locking block 6223 is fully extended. When the minimum distance is limited, the distance must be greater than the thickness or width of the locking block 6223 itself, and manufacturing tolerances must be reserved to ensure that the locking block 6223 will not scrape against the locking block 611 when it retracts into the housing 621 in the normal lifting standby state.

[0054] like Figure 8As shown, the locking component 622 includes a slidingly engaged slide 6221 and slide 6222, and a locking block 6223 that slides through the interior of the housing 621. A limit spring 6224 is fixed between the locking block 6223 and slide 6221. Several locking blocks 611 are fixed on the outer wall of the guide seat 61 and engage with the locking blocks 6223. The housing 621 is slidably connected to the guide seat 61. There are two slides 6221, which are symmetrically distributed. The two slides 6221 have matching pushing ramps on opposite sides and on the left and right sides of slide 6222. The connecting rod 63 drives slide 6222 to move downward. By pressing with the pushing ramps, the two slides 6221 move synchronously, thereby locking the locking block 6223. A limiting platform 6211 is fixed on the inner wall of the housing 621. The bottom sides of the two slide blocks 6221 are slidably connected to the limiting platform 6211. The limiting platform 6211 is used to limit and guide the locking member 622, which can prevent the locking member 622 from deviating when sliding and ensure that the locking action is accurately triggered. The locking member 622 also includes two lifting platforms 6225. Push rods 6226 are hinged between the two lifting platforms 6225 and the two slide blocks 6221. The lifting platforms 6225 are located in front of the slide blocks 6221. Specifically, locking component 622 adopts an inclined plane engagement mechanism, which can convert the vertical impact into a horizontal locking force at the moment of fall, causing locking block 6223 to quickly extend and form a one-way engagement with locking block 611. During normal lifting and lowering, the limiting spring 6224 keeps locking block 6223 elastically extended and retracted to avoid accidental triggering. At the same time, the abutment between locking block 6223 and locking block 611, combined with the limiting spring 6224, allows the position of locking block 6223 to be detected when locking component 622 is lifted and lowered, thus realizing the detection of locking component 622. It should be noted that the hinged setting of lifting platform 6225 and push rod 6226 utilizes the deformation principle of parallelogram to provide a motion transmission path for linkage push component 64.

[0055] To achieve the driving of locking component 623, such as Figure 8As shown, the pushing assembly 64 includes two connecting plates 641, with a connecting rod 642 fixed between them. The connecting rod 642 is elastically connected to the inner wall of the housing 621. The bottom connecting plate 641 is located inside the housing 621 and is positioned above the lifting platform 6225. When the slide 6221 moves, the lifting platform 6225 moves accordingly and first contacts the inner wall of the housing 621. As the slide 6221 continues to move, the push rod 6226 drives the lifting platform 6225 to move upward, thereby driving the pushing assembly 64 to work. Specifically, the pushing assembly 64 utilizes the elastic connection between the connecting rod 642 and the inner wall of the housing 621 to ensure that the lifting platform 6225 can smoothly push the bottom connecting plate 641 when it moves upward, avoiding rigid impact.

[0056] To further enhance the locking function, such as Figure 9 As shown, the locking component 623 includes a mounting base 6231 fixed to the top side of the housing 621, a guide seat 6232 sleeved on the outer surface of the mounting base 6231, and an elastic block 6233 fixed to the top side of the mounting base 6231. The inner side of the elastic block 6233 is detachably fitted with a fitting block 6234 that matches the shape of the connecting rod 63. The guide seat 6232 is fixed to the connecting plate 641 located at the top. Both the outer side of the elastic block 6233 and the inner side of the guide seat 6232 are provided with matching extrusion slopes 6235. The connecting rod 63 passes through the interior of the mounting base 6231. There are four elastic blocks 6233, which are distributed in a rectangular shape. Specifically, the locking member 623 extrudes the elastic blocks 6233 by moving the guide seat 6232 upward, causing the four rectangular elastic blocks 6233 to contract inward synchronously. The clamping block 6234 clamps the connecting rod 63 evenly from four directions, achieving a locking friction brake. The clamping block 6234 is detachable, allowing for quick replacement according to different connecting rod 63 diameters, thus improving versatility.

[0057] Example 2 further discloses the lifting method of the above-mentioned RGV lift with automatic height recognition, specifically including the following steps:

[0058] Step 1: Equipment Start-up and Movement Positioning; First, the traveling wheels 22 in the moving mechanism 2 are rotated by the electrical control box 5 to move the RGV elevator to the designated work position on the workbench 1. The current collector 11 and the sliding contact line of the rail draw power to supply power to the whole machine. It should be noted that this step realizes the autonomous positioning and power supply of the equipment without the need for external cables, which improves the flexibility of the production line layout.

[0059] Step 2: Height recognition and signal transmission; The detection device 4 installed on one side of the top support platform 31 automatically recognizes the height of the material above the support mechanism 3 or the target loading and unloading height, and transmits the height signal to the electrical control box 5 in real time; The detection device 4 can use a laser rangefinder or a vision sensor, which can adapt to the height changes of different materials and provide accurate basis for subsequent lifting;

[0060] Step 3: The lifting mechanism drives the lifting platform to rise and fall; the electrical control box 5 controls the lifting structure 23 to move according to the received height signal. The lifting structure 23 drives the carrying mechanism 3 and the detection equipment 4 to rise or fall through the connecting seat 24; at the same time, it will drive the connecting rod 63 to slide along the guide seat 61, so that the connecting rod 63 is always below the carrying mechanism 3 and maintains a safe distance; this step ensures the follow-up relationship between the carrying mechanism 3 and the connecting rod 63, so that the connecting rod 63 is always in the ready trigger position during normal lifting and lowering, without interfering with the material conveying;

[0061] Step 4: Standby state of the protection mechanism 6 during normal lifting and lowering; at normal lifting and lowering speed, the second locking block 6223 in the locking part 622 is kept retracted into the housing 621 under the action of the limiting spring 6224, and the second locking block 6223 does not contact the first locking block 611 on the guide seat 61; the elastic block 6233 in the second locking part 623 remains in a relaxed state, and the contact block 6234 is not clamped with the connecting rod 63, so the protection mechanism 6 can lift and lower without obstruction with the bearing mechanism 3; this standby setting ensures that the protection mechanism 6 is completely contactless and frictionless when the equipment is working normally, which avoids energy loss and extends the service life of the first locking block 611, the second locking block 6223 and the contact block 6234.

[0062] Step 5: Trigger the first braking action during an abnormal fall.

[0063] When the lifting structure 23 malfunctions, causing the bearing mechanism 3 to fall abnormally and rapidly, the connecting seat 24 drives the connecting rod 63 to move rapidly downward relative to the housing 621. At this time, the housing 621 stops moving when it contacts the top of the buffer rod, while the connecting rod 63 continues to move downward due to gravity. The connecting rod 63 pushes the second slide 6222 in the locking assembly 62 downward. The pushing ramps on both sides of the second slide 6222 press against the pushing ramps on the opposite side of the first slide 6221, causing the two first slides 6221 to slide horizontally in opposite directions along the limiting platform 6211. While the first slide 6221 moves horizontally, it pushes the lifting platform 6225 upward through the hinged push rod 6226. The lifting platform 6225 contacts and drives the connecting plate 641 at the bottom of the pushing assembly 64. The connecting plate 641 at the bottom drives the connecting plate 641 at the top to move upward through the connecting rod 642. The connecting plate 641 at the top drives the guide seat 6232 in the locking component 623 to move upward along the outer surface of the mounting base 6231. The extrusion slope 6235 on the inner side of the guide seat 6232 extrudes the extrusion slope 6235 on the outer side of the elastic block 6233, causing the four rectangularly distributed elastic blocks 6233 to contract inward. The contact block 6234 on the inner side of the elastic block 6233 tightly clamps the connecting rod 63, achieving the first braking and preventing the connecting rod 63 from falling rapidly.

[0064] Step Six: Achieve Secondary Braking

[0065] After the first braking by locking element 623, the descent speed slows down. At this time, the displacement of slide 6221 will compress the limiting spring 6224 and press against the locking block 6223, so that the locking block 6223 and the locking blocks 611 evenly distributed on the outer wall of the guide seat 61 form a one-way engagement, preventing the housing 621 and the connected connecting rod 63, connecting seat 24 and bearing mechanism 3 from continuing to slide down, thus achieving secondary braking.

[0066] It should be noted that the impact force is extremely large during abnormal falls. Locking component 623 first locks the connecting rod 63 through the elastic block 6233 and the bonding block 6234, and uses friction to convert the huge gravitational potential energy into heat energy, which rapidly reduces the descent speed. This design avoids the risk of tooth breakage or shearing fracture of the locking block 6223 and locking block 611 due to high-speed impact when the locking element 622 is directly triggered. By first decelerating, the relative speed between the housing 621 and the guide seat 61 is significantly reduced. At this time, the slide 6221 pushes the locking block 6223 out, allowing it to slide smoothly and accurately into the slot between the two adjacent locking blocks 611, instead of colliding hard with the top of the locking block 611 at high speed. This greatly improves the engagement power of the secondary braking, forming a double insurance of soft landing and hard locking. First, the friction braking acts as the first line of defense with an extremely fast response. The mechanical locking acts as the second line of defense, providing absolute physical limit. Even if the friction block fails due to extreme conditions, there is still a mechanical claw to catch it. Conversely, even if the claw is not fully aligned, the friction braking combined with the buffer rod has already minimized the fall damage, achieving functional redundancy and graded protection.

[0067] Example 3, as Figure 10 and Figure 11 As shown, to further optimize the driving of the locking component 623, a wedge block 6227 can be bolted to the top side of the slide block 6221 in the above embodiment. Simultaneously, a wedge surface 6228 is provided between the lifting platform 6225 above the slide block 6221 and the wedge block 6227 for abutment. When the wedge block 6227 is provided on the slide block 6221, the push rod 6226 and connecting plate 641 are eliminated, and the bottom end of the connecting rod 642 is connected to the lifting platform 6225. Specifically, by eliminating the push rod 6226, connecting plate 641, and related hinges and elastic connectors, the wedge block 6227 directly engages with the wedge surface 6228 of the lifting platform 6225. The bottom end of the connecting rod 642 is directly connected to the lifting platform 6225, which not only reduces the number of parts and the complexity of processing and assembly, but also allows the wedge block 6227 to directly push the lifting platform 6225 upward through the wedge surface 6228 when the slide 6221 moves horizontally. This eliminates the need for the hinge of the push rod 6226 and the elastic transmission of the connecting plate 641, resulting in a shorter force transmission path and higher rigidity. This allows for faster triggering of secondary braking during emergency falls, further improving braking response speed. At the same time, the sliding friction coefficient of the wedge surface 6228 is small, and there is no gap or elastic deformation at the hinge. Therefore, the displacement of the slide 6221 can be more efficiently converted into the upward movement of the lifting platform 6225.

[0068] Combined with appendix Figure 1 - Figure 9 The working principle of the above embodiments is as follows:

[0069] First, the walking wheels 22 in the moving mechanism 2 are rotated by the electrical control box 5, moving the whole machine to the designated work position on the workbench 1. The current collector 11 and the sliding contact line of the track draw power and supply power to the whole machine, completing the moving and positioning process. Then, the detection equipment 4 automatically identifies the height of the material above the carrying mechanism 3 or the target loading and unloading height, and transmits the height signal to the electrical control box 5 in real time. The electrical control box 5 controls the lifting structure 23 to move according to the received height signal. The lifting structure 23 drives the carrying mechanism 3 and the detection equipment 4 to rise or fall through the connecting seat 24, realizing automatic height identification and adjustment.

[0070] During normal lifting and lowering, the lifting structure 23 will drive the connecting rod 63 to move, and the buffer rod will lift and lower synchronously, so that the protection mechanism 6 can lift and lower without obstruction with the bearing mechanism 3, ensuring smoothness and safety during normal operation; when the lifting structure 23 malfunctions and causes the bearing mechanism 3 to fall abnormally and rapidly, the connecting rod 63 pushes the slide block 2 6222 in the locking assembly 62 to move down, and the pushing slopes on the left and right sides of the slide block 2 6222 squeeze the pushing slopes on the opposite side of the two slide blocks 1 6221;

[0071] While the slide block 6221 moves horizontally, the lifting platform 6225 is pushed upward by the hinged push rod 6226. The lifting platform 6225 contacts and pushes the bottom connecting plate 641 located inside the housing 621. The bottom connecting plate 641 drives the top connecting plate 641 to move upward through the connecting rod 642. The top connecting plate 641 drives the guide seat 6232 in the locking part 623 to move upward along the outer surface of the mounting base 6231. The extrusion slope 6235 on the inner side of the guide seat 6232 extrudes the extrusion slope 6235 on the outer side of the elastic block 6233, causing the four rectangularly distributed elastic blocks 6233 to contract inward. The contact block 6234 on the inner side of the elastic block 6233 tightly clamps the connecting rod 63, realizing friction braking and slowing down the descent speed.

[0072] The two slide blocks 6221 slide horizontally in opposite directions along the limiting platform 6211, which will compress the limiting spring 6224 and push the second locking block 6223 to extend out of the telescopic hole 6212 of the housing 621. The second locking block 6223 and the locking blocks 611 evenly distributed on the outer wall of the guide seat 61 form a one-way locking, preventing the housing 621 and the connected connecting rod 63, connecting seat 24 and bearing mechanism 3 from continuing to slide down, realizing the second mechanical braking. Through the combined action of dual protection, it is ensured that the elevator can be reliably stopped in the event of an abnormal fall.

[0073] 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. An RGV lift with automatic height recognition, comprising a current collector (11), a moving mechanism (2), a bearing mechanism (3), and a detection device (4) mounted on a workbench (1), characterized in that: The carrying mechanism (3) and the detection equipment (4) are both installed above the moving mechanism (2), and the moving mechanism (2) is provided with a protection mechanism (6) to protect the carrying mechanism (3). The protection mechanism (6) consists of a guide seat (61), a locking component (62) and a connecting rod (63). The guide seat (61) is fixed inside the moving mechanism (2), and one end of the connecting rod (63) is connected to the locking component (62). The locking assembly (62) includes a housing (621), a locking component one (622) and a locking component two (623). One end of the connecting rod (63) is fixed to the top side of the housing (621). The locking component one (622) and the locking component two (623) cooperate with each other, and a pushing assembly (64) is provided between them for linkage cooperation. The locking component 1 (622) includes a sliding block 1 (6221) and a sliding block 2 (6222) that are slidably engaged, and a snap-fit ​​block 2 (6223) that slides through the interior of the housing (621). A limit spring (6224) is fixed between the snap-fit ​​block 2 (6223) and the sliding block 1 (6221). Several snap-fit ​​blocks 1 (611) that are snap-fitted with the snap-fit ​​block 2 (6223) are fixed on the outer wall of the guide seat (61). The housing (621) is slidably connected to the guide seat (61).

2. The RGV lift with automatic height recognition according to claim 1, characterized in that: The moving mechanism (2) includes a bottom support platform (21), four wheels (22) rotatably mounted on the bottom support platform (21), and a lifting structure (23) mounted on the bottom support platform (21). A connecting seat (24) is provided between the lifting structure (23) and the support mechanism (3). An electrical control box (5) is installed on the outer wall of the bottom support platform (21).

3. The RGV lift with automatic height recognition according to claim 2, characterized in that: The bearing mechanism (3) includes a top bearing platform (31), a plurality of conveying rollers (32) rotatably mounted on the top bearing platform (31), and a drive structure (33) disposed inside the top bearing platform (31) for driving the plurality of conveying rollers (32). The bottom side of the top bearing platform (31) is bolted to the connecting seat (24), and the detection device (4) is detachably mounted on one side of the top bearing platform (31).

4. The RGV lift with automatic height recognition according to claim 3, characterized in that: There are two guide seats (61), which are symmetrically distributed between the housing (621) and their bottom sides are bolted to the bottom wall of the bottom support platform (21). The top of the connecting rod (63) abuts against the bottom side of the connecting seat (24).

5. The RGV lift with automatic height recognition according to claim 4, characterized in that: The interior of the housing (621) is hollow, and telescopic holes (6212) are provided on the outer wall of each opposite side. There are two slide blocks (6221), and the two slide blocks (6221) are symmetrically distributed. The two slide blocks (6221) are provided with matching push slopes on the opposite side and the left and right sides of the slide block (6222). The slide block (6222) is driven to move down by the connecting rod (63). By using the squeezing of the push slope, the two slide blocks (6221) move synchronously to lock the locking block (6223).

6. The RGV lift with automatic height recognition according to claim 5, characterized in that: A limiting platform (6211) is fixed on the inner wall of the housing (621), and the bottom sides of the two slide blocks (6221) are slidably connected to the limiting platform (6211); the locking member (622) also includes two lifting platforms (6225), and push rods (6226) are hinged between the two lifting platforms (6225) and the two slide blocks (6221), wherein the lifting platform (6225) is located in front of the slide block (6221).

7. An RGV lift with automatic height recognition according to claim 6, characterized in that: The pushing assembly (64) includes two connecting plates (641), and a connecting rod (642) is fixed between the two connecting plates (641). The connecting rod (642) is elastically connected to the inner wall of the housing (621). The connecting plate (641) at the bottom is located inside the housing (621) and is located above the lifting platform (6225). When the slide (6221) moves, the lifting platform (6225) moves accordingly and first contacts the inner wall of the housing (621). As the slide (6221) continues to move, the lifting platform (6225) is driven to move upward through the push rod (6226), so that it drives the pushing assembly (64) to work.

8. The RGV lift with automatic height recognition according to claim 7, characterized in that: The second locking component (623) includes a mounting base (6231) fixed to the top side of the housing (621), a guide seat (6232) sleeved on the outer surface of the mounting base (6231), and an elastic block (6233) fixed to the top side of the mounting base (6231). The inner side of the elastic block (6233) is detachably fitted with a fitting block (6234) that matches the shape of the connecting rod (63). The guide seat (6232) is fixed to the top connecting plate (641).

9. An RGV lift with automatic height recognition according to claim 8, characterized in that: The outer side of the elastic block (6233) and the inner side of the guide seat (6232) are provided with matching extrusion slopes (6235). The connecting rod (63) passes through the interior of the mounting seat (6231). There are four elastic blocks (6233), and the four elastic blocks (6233) are distributed in a rectangular shape.

10. A lifting method for an RGV lift with automatic height recognition, applied to an RGV lift with automatic height recognition as described in claim 9, comprising the following steps: Step 1: Device Start-up and Motion Positioning First, the walking wheels (22) in the moving mechanism (2) are rotated by the electrical control box (5) to move the RGV elevator to the designated work position on the workbench (1). The current collector (11) and the sliding contact line of the rail are powered to supply power to the whole machine. Step Two: Altitude Recognition and Signal Transmission The detection device (4) installed on one side of the top support platform (31) automatically identifies the height of the material above the support mechanism (3) or the target loading and unloading height, and transmits the height signal to the electrical control box (5) in real time. Step 3: The lifting mechanism drives the lifting of the load-bearing platform. Then, the electrical control box (5) controls the lifting structure (23) to move according to the received height signal. The lifting structure (23) drives the bearing mechanism (3) and the detection equipment (4) to rise or fall through the connecting seat (24). At the same time, it will drive the connecting rod (63) to slide along the guide seat (61), so that the connecting rod (63) is always below the bearing mechanism (3) to maintain a safe distance. Step 4: Standby state of the protection mechanism during normal lifting process At normal lifting speed, the second locking block (6223) in the locking part (622) remains retracted into the housing (621) under the action of the limiting spring (6224), and the second locking block (6223) does not contact the first locking block (611) on the guide seat (61); the elastic block (6233) in the second locking part (623) remains in a relaxed state, and the contact block (6234) does not clamp with the connecting rod (63); Step 5: Trigger the first braking action during an abnormal fall. When the lifting structure (23) malfunctions, causing the bearing mechanism (3) to fall abnormally and rapidly, the connecting seat (24) drives the connecting rod (63) to move rapidly downward relative to the housing (621). At this time, the housing (621) stops moving when it contacts the top of the buffer rod, while the connecting rod (63) continues to move downward due to gravity. The connecting rod (63) pushes the slide block two (6222) in the locking assembly (62) downward through the connecting rod (63). The pushing slopes on the left and right sides of the slide block two (6222) press against the pushing slopes on the opposite side of the two slide blocks one (6221), causing the two slide blocks one (6221) to slide horizontally in opposite directions along the limiting platform (6211). While the slide blocks one (6221) move horizontally, the lifting platform (6225) is pushed upward through the hinged push rod (6226), and the lifting... The platform (6225) contacts and drives the connecting plate (641) at the bottom of the push assembly (64), and the connecting plate (641) at the bottom drives the connecting plate (641) at the top to move upward through the connecting rod (642). The connecting plate (641) at the top drives the guide seat (6232) in the locking part (623) to move upward along the outer surface of the mounting base (6231). The extrusion slope (6235) on the inner side of the guide seat (6232) extrudes the extrusion slope (6235) on the outer side of the elastic block (6233), causing the four rectangular elastic blocks (6233) to contract inward. The contact block (6234) on the inner side of the elastic block (6233) tightly clamps the connecting rod (63), achieving the first braking and preventing the connecting rod (63) from falling rapidly. Step Six: Achieve Secondary Braking After the first braking by locking part two (623), the descent speed slows down. At this time, the displacement of slide one (6221) will compress the limiting spring (6224) and press against the locking block two (6223), so that the locking block two (6223) and the locking block one (611) evenly distributed on the outer wall of the guide seat (61) form a one-way locking, preventing the housing (621) and the connecting rod (63), connecting seat (24) and bearing mechanism (3) connected to it from continuing to slide down, thus realizing the second braking.

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