Hoisting system of wheel loader

Abstract

The invention relates to the technical field of hoisting of engineering mechanical equipment, and discloses a wheel loader hoisting system which comprises a basic frame and a vehicle body, the basic frame comprises a front frame and a rear frame, the front frame and the rear frame are connected in a hinged mode, and a plurality of lifting lug supports are installed on the basic frame; a balance weight device is further arranged on the portion, located on one side of each lifting lug support, of the basic frame, a deviation rectifying device and a locking device are arranged between the front frame and the rear frame, two parallel limiting plates are arranged on each lifting lug support, the limiting plates are vertically arranged, and a limiting space is formed between the two limiting plates. The lifting lug supports are provided with first electric plug pins, the first electric plug pins are arranged on the sides, away from the limiting space, of the limiting plates, pin shafts of the first electric plug pins face the limiting plates, inserting holes are formed in the two limiting plates, and during lifting, the pin shafts extending out of the first electric plug pins jointly penetrate through the two inserting holes and penetrate through the lifting ring. The lifting device has the effect of improving the lifting safety of the wheel loader.

Description

Technical Field

[0001] This application relates to the technical field of hoisting engineering machinery and equipment, and particularly to a wheel loader hoisting system. Background Art

[0002] In modern engineering construction, logistics transportation and other fields, as an important engineering machinery and equipment, wheel loaders are widely used in various operation scenarios. However, like all mechanical equipment, during long-term use, wheel loaders inevitably need to be regularly overhauled and maintained to ensure their stable performance and reliable operation.

[0003] In the overhaul process of wheel loaders, hoisting operations are a key link. Due to the large volume, complex structure and heavy self-weight of wheel loaders, there are many challenges in hoisting operations. Traditional hoisting methods often lack precise positioning and docking means, resulting in greater safety risks during hoisting. For example, when determining the center of gravity position of a wheel loader, it has mostly relied on experience in the past, which is extremely likely to cause inaccurate determination of the center of gravity, and then lead to equipment tilting, shaking during hoisting, and even possible equipment dropping, posing a serious threat to surrounding personnel and equipment.

[0004] Moreover, when connecting the lifting tool to the wheel loader, due to the lack of effective auxiliary docking devices, it requires operators to complete it by visual observation and manual operation. This is not only inefficient but also difficult to ensure the connection accuracy and stability between the lifting tool and the loader. Once the connection is not firm, the connection may become loose during the lifting process, triggering serious safety accidents. Summary of the Invention

[0005] To improve the safety of wheel loader hoisting, this application provides a wheel loader hoisting system.

[0006] The wheel loader hoisting system provided by this application adopts the following technical solutions: A wheel loader lifting system comprises a basic frame and a vehicle body mounted on the basic frame, the basic frame comprises a front frame and a rear frame, the front frame and the rear frame are hingedly connected, a plurality of lifting lug supports are mounted on the basic frame, the plurality of lifting lug supports are distributed according to the weight distribution positions of the unloaded loader measured by a floor scale, a counterweight device is detachably provided on one side of each lifting lug support on the basic frame, a deviation correction device for returning the basic frame to the correct state and a lock for locking the basic frame in the correct state are provided between the front frame and the rear frame A locking device, wherein each lifting ear support is provided with two parallel limit plates, the limit plates are vertically arranged, and a limit space is formed between the two limit plates for vertical insertion of a lifting ring for external lifting. A first electric latch is provided on the lifting ear support, and the first electric latch is arranged on the side of the limit plate away from the limit space, the pin shaft of the first electric latch faces the limit plate, and plug holes are provided on the two limit plates. When lifting, the pin shaft extended from the first electric latch passes through the two plug holes together and passes through the lifting ring in the limit space.

[0007] By adopting the above technical solution, before the formal lifting, the position of the lifting eye support is determined according to the weight distribution position of the unloaded loader measured by the scale, and the front frame and the rear frame are adjusted to the same center line by using the correction device, and then locked to the positive state by the locking device. Then, the counterweight device is installed on the loader, and the basic frame is balanced and adjusted by the counterweight device. When the lifting operation is finally performed, the external lifting ring is vertically inserted into the limited space between the limit plates, and the first electric latch extends the pin shaft through the plug hole and inserts into the lifting ring, thereby firmly confining the lifting ring in the limited space. In this way, not only can the connection between the lifting ring and the lifting eye support be ensured to be accurate and reliable, but also the safety hazards caused by unstable center of gravity or loose connection during the lifting process can be effectively avoided, which greatly improves the safety and stability of the lifting operation of the wheel loader.

[0008] Optionally, a limit switch is provided on the limit plate away from the first electric bolt. The limit switch is located on the side of the limit plate away from the first electric bolt and is provided at the plug-in hole. The limit switch is electrically connected to the first electric bolt on the same lifting ear support. When the pin shaft extending from the first electric bolt passes through the limit plate, the end of the pin shaft is in contact with the limit switch.

[0009] By adopting the above technical solution, the working state of the first electric bolt can be effectively monitored and automatically controlled during the hoisting process. Specifically, the setting of the limit switch enables the system to accurately sense whether the first electric bolt is fully inserted, thereby reducing the risk of the hoist falling off due to the bolt not being properly fixed. This design significantly improves the reliability of the hoisting operation, reduces the errors caused by manual inspection, and improves the safety and efficiency of the entire hoisting process.

[0010] Optionally, the counterweight device includes a counterweight bracket and a counterweight box disposed on the basic vehicle frame. A slide rail parallel to the length direction of the basic vehicle frame is provided on the counterweight bracket. The counterweight box is slidably sleeved on the slide rail. An adjustment assembly for driving the counterweight box to slide is provided on the counterweight bracket. Limiting insertion plates are arranged at both ends of the counterweight bracket along its length direction in a lifting manner. Tooth plates are arranged at the bottom of the counterweight box along the guidance of the slide rail. When the limiting insertion plates are lifted, their tips are inserted between adjacent tooth tips on the tooth plates.

[0011] By adopting the above technical solution, in order to effectively balance the unstable factors caused by the center of gravity shift during the hoisting process, first, after the adjustment assembly drives the counterweight box to move to a suitable position under the guidance of the slide rail, the limiting insertion plates rise, and their tips are inserted between adjacent tooth tips of the tooth plate to fix the position of the counterweight box. The counterweight device can flexibly adjust the position of the counterweight box according to actual needs and firmly lock it, thereby improving the safety and reliability of the hoisting operation.

[0012] Optionally, the deviation correction device includes a metal induction plate disposed on the front vehicle frame and a first proximity switch disposed on the rear vehicle frame. The metal induction plate is arc-shaped, and its center of the circle coincides with the center of the hinge axis between the front vehicle frame and the rear vehicle frame. One first proximity switch is provided on each side of the center line of the rear vehicle frame and is located on the moving path of the metal induction plate. When the first proximity switches on both sides simultaneously receive the induction signal of the metal induction plate, the front vehicle frame and the rear vehicle frame are on the same center line.

[0013] By adopting the above technical solution, the brake motor drives the driving gear roller to rotate, and the driving gear roller meshes with the tooth plate, thereby driving the counterweight box to slide along the slide rail. During this process, the start and stop of the brake motor can precisely control the position of the counterweight box, realizing flexible adjustment of the counterweight box on the counterweight bracket. It not only improves the efficiency of counterweight adjustment but also significantly enhances the stability of the hoisting system, enabling the wheel loader to better maintain balance during the hoisting process and reducing the safety risks caused by unstable center of gravity.

[0014] Optionally, the deviation correction device includes a metal induction plate disposed on the front vehicle frame and a first proximity switch disposed on the rear vehicle frame. The metal induction plate is arc-shaped, and its center of the circle coincides with the center of the hinge axis between the front vehicle frame and the rear vehicle frame. One first proximity switch is provided on each side of the center line of the rear vehicle frame and is located on the moving path of the metal induction plate. When the first proximity switches on both sides simultaneously receive the induction signal of the metal induction plate, the front vehicle frame and the rear vehicle frame are on the same center line.

[0015] By adopting the above technical solution, the metal sensing plate and the first proximity switch cooperate with each other to accurately monitor the position change of the front frame relative to the rear frame. When it is detected that the front frame and the rear frame are not on the same center line, the front frame will adjust and rotate around the center of the hinge until the first proximity switches on both sides simultaneously capture the signal of the metal sensing plate. This design not only realizes the timely correction of the frame offset state and avoids the instability caused by the deviation of the center of gravity, but also greatly enhances the overall safety and operational reliability of the wheel loader in the lifting operation.

[0016] Optionally, a rotating seat is provided on the side wall of the rear frame, a rotating shaft is provided on the rotating seat for vertical rotation, a locking seat is provided on the side wall of the front frame on the same side as the rotating seat, the locking device includes a connecting rod connected to the rotating shaft and a driving assembly for driving the connecting rod to rotate, a second electric latch is provided on the top of the locking seat, a connecting hole is opened on the locking seat, and when one end of the connecting rod is inserted into the rotating seat, the pin shaft of the second electric latch passes through the connecting rod and the connecting hole.

[0017] By adopting the above technical solution, when the free end of the connecting rod is inserted into the rotating seat and locked by the second electric latch, it can effectively prevent the connecting rod from accidentally loosening in the non-operating state, thereby ensuring the stable connection of the front and rear frames of the wheel loader during the lifting process. This design not only improves the safety of the lifting system, but also avoids the risk of body shaking or falling off due to loose connecting rods, providing more reliable protection for the entire lifting operation.

[0018] Optionally, the connecting rod is fixedly connected to the rotating shaft of the rotating seat, and the end of the rotating shaft extends out of the rotating seat, and the driving assembly includes a rotating motor, a driving sprocket, a driven sprocket and a synchronous chain that is meshed and sleeved on the driving sprocket and the driven sprocket, the rotating motor is arranged on the side wall of the rear frame, the driving sprocket is sleeved on the motor output shaft, and the driven sprocket is sleeved on the rotating shaft.

[0019] By adopting the above technical solution, the driving sprocket is driven by the rotating motor, and the driven sprocket is driven by the synchronous chain, so as to realize the precise and reliable rotation of the shaft and the connecting rod on it. This design not only reduces the need for manual intervention and improves work efficiency, but also ensures that the switching of the connecting rod in different working states is smoother and more accurate, further enhancing the overall safety and reliability of the lifting system.

[0020] Optionally, a fixed seat is provided on the rear frame on the side of the rotating seat away from the locking seat, and an electromagnetic latch is provided on the fixed seat. When one end of the connecting rod is inserted into the fixed seat, the fixed seat is vertically connected to the upper edge of the connecting rod and is penetrated by a locking hole for inserting the iron core of the electromagnetic latch.

[0021] By adopting the above technical solution, when the connecting rod is inserted into the fixed seat, the electromagnetic bolt can quickly achieve mechanical locking, effectively preventing the connecting rod from accidentally detaching, thereby ensuring the structural stability of the wheel loader under special working conditions. This design not only improves the safety of the entire hoisting system, but also simplifies the operation process, reduces the uncertainty brought by human intervention, and further reduces the operation difficulty and potential risks.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Before the formal hoisting, determine the position of the lifting lug support according to the weight distribution points of the empty loader measured by the weighbridge, use the deviation correction device to adjust the front frame and the rear frame to the same center line, then lock the return position through the locking device, and then, assemble the counterweight device on the loader and balance the basic frame through the counterweight device. Finally, when performing the hoisting operation, vertically insert the external lifting ring into the limiting space between the limiting plates, and the first electric bolt extends out the pin shaft through the insertion hole and inserts into the lifting ring, thereby firmly restricting the lifting ring in the limiting space. In this way, not only can the connection between the lifting ring and the lifting lug support be ensured to be accurate and reliable, but also the safety hazards caused by unstable center of gravity or loose connection during the hoisting process can be effectively avoided, greatly improving the safety and stability of the hoisting operation of the wheel loader; 2. It is possible to effectively monitor and automatically control the working state of the first electric bolt during the hoisting process. Specifically, the setting of the limit switch enables the system to accurately sense whether the first electric bolt is fully inserted in place, thereby reducing the risk of the lifting tool falling off due to incorrect fixing of the bolt. This design significantly improves the reliability of the hoisting operation, reduces the errors caused by manual inspection, and improves the safety and efficiency of the entire hoisting process; 3. In order to effectively balance the unstable factors caused by the center of gravity shift during the hoisting process, first, the adjustment component drives the counterweight box to move to a suitable position under the guidance of the slide rail, and then the limit insertion plate rises, and its tip inserts between two adjacent tooth tips of the tooth plate to fix the position of the counterweight box. The counterweight device can flexibly adjust the position of the counterweight box according to actual needs and firmly lock it, thereby improving the safety and reliability of the hoisting operation. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0024] Figure 2 is the schematic diagram showing the positional relationship between the metal induction plate and the first proximity switch in the embodiment of the present application.

[0025] Figure 3 is the schematic diagram showing the connection relationship between the connecting rod, the rotating seat, the locking seat and the fixed seat in the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram showing the connection relationship between the counterweight support and the counterweight box in the embodiment of the present application.

[0027] Figure 5 It is a sectional view showing the connection relationship between the counterweight support and the counterweight box in the embodiment of the present application.

[0028] Figure 6 It is a schematic diagram showing the connection relationship between a single lug support and an electric plug pin in the embodiment of the present application.

[0029] Explanation of reference numerals: 1. Basic frame; 11. Front frame; 111. Locking seat; 1111. Second electric plug pin; 1112. Connection hole; 12. Rear frame; 121. Rotating seat; 1211. Rotating shaft; 122. Fixed seat; 2. Vehicle body; 3. Lug support; 31. Limiting plate; 311. Limiting space; 312. Guide inclined plane; 313. Insertion hole; 4. Counterweight device; 41. Counterweight support; 411. Slide rail; 412. Limiting slider; 413. Cylinder; 414. Limiting insertion plate; 42. Counterweight box; 421. Scale; 422. Liquid inlet pipe; 4221. Plug; 423. Tooth plate; 43. Adjusting component; 431. Brake motor; 432. Driving gear roller; 4321. Synchronous pulley; 4322. Synchronous belt; 5. Deviation rectifying device; 51. Metal induction plate; 52. First proximity switch; 6. Locking device; 61. Link; 611. Locking hole; 62. Driving component; 621. Rotating motor; 622. Driving sprocket; 623. Driven sprocket; 624. Synchronous chain; 7. First electric plug pin; 8. Limit switch; 9. Electromagnetic plug pin; 91. Second proximity switch. Detailed implementation manners

[0030] The following further elaborates on the present application in conjunction with the attached Figure 1-6 drawings.

[0031] The embodiment of the present application discloses a wheel loader hoisting system.

[0032] Referring to Figure 1 , a wheel loader hoisting system includes a basic frame 1, a vehicle body 2, and a plurality of lug supports 3 distributed on the basic frame 1. The lug supports 3 are reasonably arranged according to the weight distribution points of the unloaded wheel loader measured by the weighbridge and are installed on the basic frame 1. Moreover, a counterweight device 4 is provided on one side of each lug support 3 on the basic frame 1. The basic frame 1 includes a front frame 11 and a rear frame 12, which are hinged to each other. A deviation rectifying device 5 for straightening the frame attitude and a locking device 6 for locking the current state are provided at the hinge of the front frame 11 and the rear frame 12.

[0033] Referring to Figure 1Before formal lifting, the front frame 11 and the rear frame 12 are adjusted to the same center line by the deviation correction device 5, and then locked back to the correct state by the locking device 6. Then, the basic frame 1 is balanced and adjusted by the counterweight device 4. Finally, the external lifting ring is accurately connected to the lifting eye support 3, and after the wheel loader is lifted, it is inspected and repaired.

[0034] Reference Figure 1 and Figure 2 The deviation correction device 5 includes a metal sensing plate 51 and a first proximity switch 52. The metal sensing plate 51 is curved in an arc shape, and its curvature radius is consistent with the hinge axis of the front and rear frames 12. The metal sensing plate 51 is installed on the bottom wall of the front frame 11 by bolts. The first proximity switch 52 is symmetrically arranged on both sides of the center line of the rear frame 12 and is installed on the rear frame 12 through ear plates. The two first proximity switches 52 are set on the path where the metal sensing plate 51 rotates around the center of the hinge axis. When the first proximity switches 52 on both sides detect the signal of the metal sensing plate 51 at the same time, it indicates that the vehicle body has returned to a horizontal state.

[0035] Reference Figure 1 and Figure 3 The locking device 6 includes a connecting rod 61 and a driving assembly 62. A rotating seat 121 is fixedly provided on the side wall of the rear frame 12. A locking seat 111 is fixedly provided on the side wall of the front frame 11 on the same side as the rotating seat 121. A fixed seat 122 is fixedly provided on the side wall of the rear frame 12 on the side of the rotating seat 121 away from the locking seat 111. A vertically arranged rotating shaft 1211 is rotatably connected to the rotating seat 121. The connecting rod 61 is installed on the rotating seat 121 through the rotating shaft 1211. During the rotation of the connecting rod 61 around the rotating shaft 1211, its free end can be inserted into the locking seat 111, and its rod body can be inserted into the fixed seat 122.

[0036] Reference Figure 3 A second electric bolt 1111 is fixedly provided on the top of the locking seat 111. When the free end of the connecting rod 61 rotates around the rotating shaft 1211 toward the rotating seat 121 and is inserted into the rotating seat 121, the locking seat 111 is vertically connected to the upper edge of the free end of the connecting rod 61 and is penetrated by a connecting hole 1112 for inserting the pin shaft of the second electric bolt 1111.

[0037] Reference Figure 3, an electromagnetic latch 9 is installed on the top of the fixed seat 122. When the free end of the connecting rod 61 rotates around the rotating shaft 1211 toward the fixed seat 122 and is inserted into the fixed seat 122, the fixed seat 122 and the connecting rod 61 are vertically connected and penetrated by a locking hole 611 for inserting the iron core of the electromagnetic latch 9. In addition, a second proximity switch 91 is installed on the top wall of the electromagnetic latch 9 away from the fixed seat 122. When the electromagnetic latch 9 is energized and the top of its iron core extends until it enters the sensing range of the second proximity switch 91, the second proximity switch 91 sends an electrical signal to the driving component 62 to confirm that the connecting rod 61 has been unlocked, indicating that the free end of the connecting rod 61 can rotate at this time.

[0038] Reference Figure 3 The driving assembly 62 in this embodiment includes a rotating motor 621, a driving sprocket 622, a driven sprocket 623 and a synchronous chain 624. The top of the rotating shaft 1211 of the rotating seat 121 extends out of the rotating seat 121. The rotating motor 621 is located above the rotating seat 121 and is fixedly arranged on the side wall of the rear frame 12. The driving sprocket 622 is fixedly sleeved on the end of the motor output shaft, and the driven sprocket 623 is fixedly sleeved on the end of the rotating shaft 1211 extending out of the rotating seat 121. The synchronous chain 624 is jointly meshed and sleeved on the driving sprocket 622 and the driven sprocket 623.

[0039] Refer to 1 and Figure 3 When the current position of the basic frame 1 needs to be locked, it is first necessary to receive the electric signal from the second proximity switch 91 confirming the unlocking of the connecting rod 61, and then start the rotating motor 621, the output shaft of the rotating motor 621 rotates, thereby driving the driving sprocket 622 to rotate. At the same time, under the pull of the synchronous chain 624, the driven sprocket 623 rotates accordingly, thereby causing the free end of the connecting rod 61 to move closer to the locking seat 111, until the free end of the connecting rod 61 is inserted into the middle of the locking seat 111. At this time, the pin shaft of the second electric bolt 1111 located at the top of the locking seat 111 extends out, thereby connecting the connection hole 1112 reserved at the end of the connecting rod 61, and achieving a quick lock between the locking seat 111 and the connecting rod 61. On the contrary, the pin shaft of the first electric bolt 7 is retracted to release the constraint on the connecting rod 61, and then the motor is reversed, and the free end of the connecting rod 61 is away from the locking seat 111. At this time, the loader can resume normal driving function.

[0040] Reference Figure 4 and Figure 5, the counterweight device 4 includes a counterweight bracket 41 and a counterweight box 42. The counterweight bracket 41 is fixed to the top of the wheel bracket on the basic vehicle frame 1 by bolts. The slide rail 411 is fixedly arranged on the top of the counterweight bracket 41 along the length direction of the basic vehicle frame 1, and its cross-section is T-shaped. The counterweight box 42 is slidably sleeved on the slide rail 411. The outer shell of the counterweight box 42 is made of aluminum alloy. A cavity is formed inside it. A transparent scale 421 is fixedly arranged on its side wall. A liquid inlet pipe 422 is fixed to its top. A plug 4221 is connected to the top of the liquid inlet pipe 422 by bolts. Certain volumes of liquid can be injected into each counterweight box 42 as needed, so as to provide sufficient weight and maintain the lifting stability. The counterweight box 42 can be removed during the normal operation of the wheel loader and is only assembled on the wheel loader for use during hoisting and maintenance.

[0041] Referring to Figure 4 and Figure 5 , an adjustment assembly 43 is arranged on the counterweight bracket 41. The adjustment assembly 43 includes a brake motor 431 and a driving gear roller 432. A toothed plate 423 is fixedly arranged at the bottom of the counterweight box 42. The axial direction of rotation of the driving gear roller 432 is perpendicular to the guide rail and is rotatably connected in the top groove of the counterweight bracket 41. The driving gear roller 432 is rotationally meshed with the toothed plate 423. In the embodiment of the present application, two driving gear rollers 432 are arranged in parallel. Synchronous wheels 4321 are fixedly sleeved on the ends of both driving gear rollers 432 extending out of the side wall of the counterweight bracket 41. A synchronous belt 4322 is meshed and sleeved between the two synchronous wheels 4321. The brake motor 431 is fixedly arranged on the side wall of the counterweight bracket 41, and its output shaft is coaxially and fixedly connected to the end of one driving gear roller 432 extending out of the side wall of the counterweight bracket 41.

[0042] Referring to Figure 4 and Figure 5 , wedge-shaped limiting sliders 412 are fixedly arranged on the side walls at both ends of the counterweight bracket 41 along its own length direction. Limiting insertion plates 414 are slidably sleeved on the limiting sliders 412. A cylinder 413 is fixedly arranged on the end side wall of the counterweight bracket 41. The top of the piston rod of the cylinder 413 is fixedly connected to the bottom wall of the limiting insertion plate 414. When the counterweight box 42 slides to the balance of the wheel loader, the cylinder 413 drives the limiting insertion plate 414 to jack up. At this time, the tip of the limiting insertion plate 414 is inserted between two adjacent tooth tip strips on the toothed plate 423.

[0043] Referring to Figure 1 and Figure 6When the wheel loader is actually installed, one lifting eye support 3 is installed at both ends of the wheel shaft 1211 of the front frame 11, and one is installed at both sides of the battery box position of the rear frame 12. Two parallel limiting plates 31 are vertically fixed on each lifting eye support 3, and a limiting space 311 for inserting an external lifting tool is formed between the two limiting plates 31. The top opposite sides of the two limiting plates 31 on the same lifting eye support 3 are provided with guiding inclined surfaces 312, and the guiding inclined surfaces 312 are inclined toward the inside of the limiting space 311.

[0044] Reference Figure 1 and Figure 6 A first electric latch 7 is fixedly provided on each lifting ear support 3 on the side of the limiting plate 31 away from the limiting space 311, and a plug hole 313 is connected and opened on the two limiting plates 31 along the pin shaft direction of the first electric latch 7. The pin shaft extended from the first electric latch 7 is plugged into and matched with the plug hole 313, and the pin shaft extended from the first electric latch 7 is passed through two plug holes 313 to realize the rapid fixation of the sling.

[0045] Reference Figure 6 A limit switch 8 is installed on the side wall of the limit plate 31. The limit switch 8 is installed on the limit plate 31 on the side away from the first electric bolt 7 and is located at the plug hole 313. The limit switch 8 is electrically connected to the first electric bolt 7 on the same lifting ear support 3. When the pin shaft of the first electric bolt 7 extends out of the limit plate 31 through the plug hole 313, the end of the pin shaft is in conflict with the limit switch 8. At this time, the limit switch 8 can accurately sense whether the first electric bolt 7 is fully inserted into place, and cut off the power to the first electric bolt 7 and maintain the current state.

[0046] The implementation principle of a wheel loader lifting system in an embodiment of the present application is: before lifting the wheel loader, the connection status of the front frame 11 and the rear frame 12 is monitored in real time through the cooperation of the metal sensing plate 51 and the first proximity switch 52, and their status is adjusted until the base frame 1 remains on the same center line.

[0047] Then, the electromagnetic latch 9 is started to raise its iron core, thereby triggering the second proximity switch 91, confirming the electrical signal of the unlocked state of the connecting rod 61, and then starting the rotating motor 621 to drive the active sprocket 622 to rotate, and with the help of the synchronous chain 624, the driven sprocket 623 is pulled to rotate accordingly, thereby causing the connecting rod 61 to move closer to the locking seat 111 until the two are completely fitted.

[0048] Next, the brake motor 431 drives the driving gear roller 432 to rotate, and the driving gear roller 432 engages with the gear plate 423, thereby driving the counterweight box 42 to slide along the slide rail 411, balance the basic frame 1, and lift the limit plug plate 414 to fix the position of the counterweight box 42.

[0049] Finally, the limiting plate 31 on the lifting lug support 3 and the first electric bolt 7 cooperate to accurately limit the position of the external lifting tool and achieve a firm connection through the automatic locking function, so that the lifting operation can be carried out, which can greatly reduce the uncertainty caused by human factors and improve the safety factor of the overall lifting.

[0050] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A wheel loader hoisting system, comprising a basic vehicle frame (1) and a vehicle body (2) mounted on the basic vehicle frame (1), wherein the basic vehicle frame (1) comprises a front vehicle frame (11) and a rear vehicle frame (12), and the front vehicle frame (11) and the rear vehicle frame (12) are hinged to each other, characterized in that, A plurality of lifting lug supports (3) are installed on the basic frame (1), and the plurality of lifting lug supports (3) are distributed according to the weight distribution position of the unloaded loader measured by the scale. A counterweight device (4) is detachably provided on one side of each lifting lug support (3) on the basic frame (1). A deviation correction device (5) for returning the basic frame (1) to the correct position and a locking device (6) for locking the basic frame (1) in the correct position are provided between the front frame (11) and the rear frame (12). Two parallel limit plates (31) are provided on each lifting lug support (3), and the limit plates (31) are vertically arranged. The two limit plates (31) are arranged such that a limit space (311) is formed between the two limit plates (31) for facilitating the vertical insertion of a lifting ring for external lifting. A first electric latch (7) is arranged on the lifting ear support (3). The first electric latch (7) is arranged on a side of the limit plate (31) away from the limit space (311). The pin shaft of the first electric latch (7) faces the limit plate (31). Both limit plates (31) are provided with plug holes (313). When lifting, the pin shaft extending from the first electric latch (7) passes through the two plug holes (313) and the lifting ring in the limit space (311).

2. The wheel loader hoisting system according to claim 1, wherein A limit switch (8) is arranged on the limit plate (31) away from the first electric bolt (7). The limit switch (8) is located on the side of the limit plate (31) away from the first electric bolt (7) and is arranged at the plug hole (313). The limit switch (8) is electrically connected to the first electric bolt (7) on the same hanging ear support (3). When the pin shaft of the first electric bolt (7) passes through the limit plate (31), the end of the pin shaft is in contact with the limit switch (8).

3. The wheel loader hoisting system according to claim 1, characterized in that The counterweight device (4) comprises a counterweight bracket (41) and a counterweight box (42) arranged on the basic frame (1); the counterweight bracket (41) is provided with a slide rail (411) parallel to the length direction of the basic frame (1); the counterweight box (42) is slidably sleeved on the slide rail (411); the counterweight bracket (41) is provided with an adjustment component (43) for driving the counterweight box (42) to slide; both ends of the counterweight bracket (41) along its own length direction are provided with limit plates (414) for lifting and lowering; the bottom of the counterweight box (42) is provided with a tooth plate (423) along the guide cloth of the slide rail (411); the limit plate (414) is lifted up, and its tip is inserted between two adjacent tooth tip bars on the tooth plate (423).

4. The wheel loader hoisting system according to claim 3, characterized in that The adjustment component (43) includes a driving gear roller (432) rotatably meshed with the gear plate (423) and a brake motor (431) driving the driving gear roller (432) to rotate. The axial direction of the driving gear roller (432) is vertically arranged between the slide rail (411) and is rotatably connected to the top of the counterweight bracket (41). The brake motor (431) is arranged on the side wall of the counterweight bracket (41) and is coaxially connected to one of the driving gear rollers (432).

5. The wheel loader hoisting system according to claim 1, characterized in that The deviation correction device (5) comprises a metal sensing plate (51) arranged on the front frame (11) and a first proximity switch (52) arranged on the rear frame (12); the metal sensing plate (51) is arranged in an arc shape, and its center coincides with the center of the hinge axis between the front frame (11) and the rear frame (12); one of the first proximity switches (52) is arranged on both sides of the center line of the rear frame (12) and is located on the moving path of the metal sensing plate (51); when the first proximity switches (52) on both sides simultaneously receive the sensing signal of the metal sensing plate (51), the front frame (11) and the rear frame (12) are on the same center line.

6. The wheel loader hoisting system according to claim 5, wherein A rotating seat (121) is arranged on the side wall of the rear frame (12), a rotating shaft (1211) is arranged on the rotating seat (121) for vertical rotation, a locking seat (111) is arranged on the side wall of the front frame (11) on the same side as the rotating seat (121), the locking device (6) comprises a connecting rod (61) connected to the rotating shaft (1211) and a driving assembly (62) for driving the connecting rod (61) to rotate, a second electric bolt (1111) is arranged on the top of the locking seat (111), a connecting hole (1112) is opened on the locking seat (111), and when one end of the connecting rod (61) is inserted into the rotating seat (121), the pin shaft of the second electric bolt (1111) passes through the connecting rod (61) and the connecting hole (1112).

7. The wheel loader hoisting system according to claim 6, characterized in that The connecting rod (61) is fixedly connected to the rotating shaft (1211) of the rotating seat (121), and the end of the rotating shaft (1211) extends out of the rotating seat (121). The driving assembly (62) comprises a rotating motor (621), a driving sprocket (622), a driven sprocket (623), and a synchronous chain (624) which is meshed and sleeved on the driving sprocket (622) and the driven sprocket (623). The rotating motor (621) is arranged on the side wall of the rear frame (12), the driving sprocket (622) is sleeved on the output shaft of the motor, and the driven sprocket (623) is sleeved on the rotating shaft (1211).

8. The wheel loader hoisting system according to claim 6, wherein A fixed seat (122) is provided on the rear frame (12) at a side of the rotating seat (121) away from the locking seat (111), and an electromagnetic latch (9) is provided on the fixed seat (122). When one end of the connecting rod (61) is inserted into the fixed seat (122), the fixed seat (122) is vertically connected to the rod body of the connecting rod (61), and a locking hole (611) is penetrated through the rod body for inserting the iron core of the electromagnetic latch (9).

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