A lifting device for a transfer vehicle

Abstract

The present invention relates to the technical field of construction machinery, and specifically relates to a lifting device for a transfer vehicle, which includes a lifting device body with a telescopic length. A sliding frame is slidably connected to the middle section of the top of the lifting device body, and a first driving mechanism for driving the sliding frame to slide horizontally is fixedly arranged. A rotary platform is rotatably connected to the top surface of the sliding frame. A connecting frame is slidably arranged on the top surface of the rotary platform, and a second driving mechanism for driving the connecting frame to slide longitudinally is fixedly arranged. The connecting frame is used to be connected to the lifting arm of the transfer vehicle. In the present invention, there are lateral force sensors and the first driving mechanism and the second driving mechanism for controlling the position of the connecting member. Therefore, when the structure carrying the lifting device is loaded and undergoes deflection deformation, the second driving mechanism will timely adjust the position of the connecting frame, thereby compensating for the influence of the deflection deformation of the lifting device body on the lifted object and achieving precise transfer.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly to a lifting device for a transfer vehicle. Background Technique

[0002] At present, in the field of construction, it is often necessary to transfer some heavy lifting parts, and transfer vehicles will inevitably be used during the transfer process. In the prior art, the utility model patent with the publication number CN211594841U proposes a transfer vehicle, including a chassis, a leg mechanism, a first slewing mechanism, a pitching mechanism, a main telescopic boom mechanism, a luffing mechanism, and a special lifting device. Among them, the special lifting device is used to connect with the lifting part and can fix or release the lifting part. However, the existing special lifting device still has some defects. For example, the existing lifting device lacks a deflection compensation mechanism. That is, during the process of transferring the lifting part, due to the certain weight of the lifting part itself, the structure connecting and bearing the lifting device will produce a certain degree of deflection deformation, which will change the relative posture of the lifting device and the lifting part during the lifting process. Therefore, it will bring additional lateral loads to the lifting device and the lifting part, and it is easy to damage the lifting device and the lifting part. In addition, when the transfer vehicle accelerates, decelerates or turns during the transfer process, due to the large weight and inertia of the lifting part itself, the lifting part will generate a large impact force on the lifting device, and this impact force is likely to damage the connecting components of the lifting part and the lifting device. For this reason, we propose a lifting device for a transfer vehicle to well solve the above drawbacks. Summary of the Invention

[0003] The purpose of the present invention is to provide a lifting device for a transfer vehicle to solve the problems raised in the above background technique.

[0004] The present invention is achieved through the following technical solutions: A lifting device for a transfer vehicle includes a lifting device body with a telescopic length. A sliding frame is slidably connected to the middle section of the top of the lifting device body, and a first driving mechanism for driving the sliding frame to slide horizontally is fixedly arranged. A rotary platform is rotatably connected to the top surface of the sliding frame. A connecting frame is slidably arranged on the top surface of the rotary platform, and a second driving mechanism for driving the connecting frame to slide longitudinally is fixedly arranged. The connecting frame is used to connect with the lifting arm of the transfer vehicle.

[0005] Lifting cylinders are fixedly arranged on the front and back sides of the left and right ends of the lifting device body. The piston rod of the lifting cylinder is vertically downward and is provided with a lateral force sensor. A rotary lock device for connecting with the lifting part is arranged at the bottom end of the lateral force sensor. The lifting device body also has a controller. The signal output end of the lateral force sensor is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the second driving mechanism.

[0006] Preferably, rotary lock brackets are movably arranged below the left and right ends of the spreader body. A guide shaft is vertically arranged on the top surface of the rotary lock bracket. Through holes adapted to the guide shaft are formed at the bottoms of the left and right ends of the spreader body. A bearing seat is fixedly arranged in the through hole. The bearing seat and the guide shaft are arranged on the same central axis. A spherical plain bearing is fixedly arranged inside the bearing seat. The inner ring of the spherical plain bearing is in clearance fit with the guide shaft.

[0007] Preferably, the bearing seat is in a cylindrical structure. The inner hole of the bearing seat is in a three-stage stepped shape. The inner hole of the bearing seat is successively a first stepped hole, a second stepped hole and a third stepped hole from bottom to top. The outer ring of the spherical plain bearing is fixedly connected to the inner wall of the first stepped hole. The top end of the inner ring of the spherical plain bearing is in clearance fit with the junction of the second stepped hole and the third stepped hole, for limiting the deflection angle of the inner ring of the spherical plain bearing.

[0008] Preferably, a conical guide is integrally formed at the top end of the guide shaft. Mounting ears are uniformly arranged on the outer periphery of the bottom of the guide shaft. The mounting ears and the bottom end of the guide shaft are fixedly welded to the top surface of the rotary lock bracket.

[0009] Preferably, the spreader body includes a fixed arm and first telescopic arms fixedly arranged at the left and right ends of the fixed arm. The first telescopic arms are in a hollow structure. Second telescopic arms are inserted into the two first telescopic arms. One end of the second telescopic arm extends to the outside of the first telescopic arm.

[0010] Preferably, first sliding grooves distributed transversely are formed on the front and rear sides inside the sliding bracket. The front and rear sides of the top of the fixed arm are respectively in sliding fit with the two first sliding grooves inside the sliding bracket; the first driving mechanism adopts a first oil cylinder. The cylinder body of the first oil cylinder is fixedly connected to the fixed arm. The piston rod of the first oil cylinder is connected to the sliding bracket.

[0011] Preferably, second sliding grooves distributed longitudinally are symmetrically arranged on both sides of the top surface of the slewing platform. Guide rails adapted to the second sliding grooves are arranged on both sides of the bottom end of the connecting frame. The guide rails are in sliding fit with the second sliding grooves; the second driving mechanism adopts a second oil cylinder. The cylinder body of the second oil cylinder is fixedly connected to one end of the second sliding groove. The piston rod of the second oil cylinder is fixedly connected to the guide rail.

[0012] Preferably, a slewing disc is arranged on the top surface of the sliding bracket. A slewing mechanism is fixedly arranged on the top surface of the slewing disc. The rotating shaft of the slewing mechanism is fixedly connected to the slewing platform.

[0013] Compared with the prior art, the present invention provides a spreader device for a transfer vehicle, having the following beneficial effects:

[0014] 1. In the present invention, there are a lateral force sensor, a first driving mechanism, and a second driving mechanism for controlling the position of the connecting member. Therefore, when the structure connecting the load-bearing sling is loaded and undergoes deflection deformation, the second driving mechanism will timely adjust the position of the connecting frame, thereby compensating for the influence of the deflection deformation of the sling body on the suspended load and achieving precise reloading.

[0015] 2. In the present invention, there are a rotary lock frame, a guide shaft, and a spherical plain bearing. By inserting the guide shaft into the spherical plain bearing, the rotary lock frame and the sling body can be coordinated, thereby improving the stability of the rotary lock frame and reducing the impact force on the lifting cylinder during the high-speed reloading process of the suspended load due to acceleration and deceleration.

[0016] 3. In the present invention, there is a lifting device, which can realize the vertical lifting of the suspended load in a narrow space, helping to enhance the flexibility of the suspended load during the reloading process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a schematic structural diagram of the fixed arm of the present invention;

[0019] Figure 3 is a schematic structural diagram of the first telescopic arm of the present invention;

[0020] Figure 4 is a schematic structural diagram of the second telescopic arm of the present invention;

[0021] Figure 5 is a schematic structural diagram of the sliding frame of the present invention;

[0022] Figure 6 is a schematic structural diagram of the slewing platform of the present invention;

[0023] Figure 7 is a schematic structural diagram of the connecting frame of the present invention;

[0024] Figure 8 is a schematic structural diagram of the rotary lock frame of the present invention;

[0025] Figure 9 is a schematic assembly diagram of the guide shaft and the spherical plain bearing of the present invention;

[0026] Figure 10 is a schematic structural diagram of the bearing seat of the present invention;

[0027] Figure 11 is a schematic structural diagram of the spherical plain bearing of the present invention;

[0028] Figure 12 is a schematic structural diagram of the lateral force sensor of the present invention.

[0029] In the figure: 1. Hoisting tool body; 101. Fixed arm; 102. First telescopic arm; 103. Second telescopic arm; 2. Sliding frame; 3. First chute; 4. First driving mechanism; 5. Slewing platform; 6. Connecting frame; 7. Second driving mechanism; 8. Lifting oil cylinder; 9. Lateral force sensor; 10. Twist lock device; 11. Twist lock frame; 12. Guide shaft; 1201. Guide cone; 1202. Mounting ear; 13. Through hole; 14. Bearing seat; 1401. First stepped hole; 1402. Second stepped hole; 1403. Third stepped hole; 15. Spherical plain bearing; 16. Slewing mechanism; 17. Second chute; 18. Guide rail; 19. Turntable. Detailed implementation mode

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment: Please refer to Figures 1-12 , a hoisting tool device for a transfer vehicle, including a hoisting tool body 1 with a telescopic length. The hoisting tool body 1 includes a fixed arm 101 and first telescopic arms 102 fixedly arranged at the left and right ends of the fixed arm 101. The first telescopic arms 102 are of a hollow structure. Second telescopic arms 103 are inserted into both of the two first telescopic arms 102. One end of the second telescopic arm 103 extends to the outside of the first telescopic arm 102, and the other end of the second telescopic arm 103 is fixedly connected to the first telescopic arm 102 by bolts.

[0032] A sliding frame 2 is slidably connected to the middle section of the top of the spreader body 1, and a first driving mechanism 4 for driving the sliding frame 2 to slide horizontally is fixedly arranged. Specifically, first sliding grooves 3 distributed horizontally are formed on the front and rear sides inside the sliding frame 2, and the front and rear sides of the top of the fixed arm 101 are respectively in sliding fit with the two first sliding grooves 3 inside the sliding frame 2; the first driving mechanism 4 adopts a first oil cylinder, the cylinder body of the first oil cylinder is fixedly connected to the fixed arm 101, and the piston rod of the first oil cylinder is connected to the sliding frame 2. Therefore, the left and right horizontal movement of the sliding frame 2 can be directly controlled by the first oil cylinder. A slewing platform 5 is rotatably connected to the top surface of the sliding frame 2. Specifically, a slewing disc 19 is arranged on the top surface of the sliding frame 2, and a slewing mechanism 16 is fixedly arranged on the top surface of the slewing disc 19. The rotating shaft of the slewing mechanism 16 is fixedly connected to the slewing platform 5. A connecting frame 6 is slidably arranged on the top surface of the slewing platform 5, and a second driving mechanism 7 for driving the connecting frame 6 to slide longitudinally is fixedly arranged. Among them, the connecting frame 6 is used to be connected to the boom of the transfer vehicle; specifically, second sliding grooves 17 distributed longitudinally are symmetrically arranged on both sides of the top surface of the slewing platform 5, guide rails 18 adapted to the second sliding grooves 17 are arranged on both sides of the bottom end of the connecting frame 6, and the guide rails 18 are in sliding fit with the second sliding grooves 17; the second driving mechanism 7 adopts a second oil cylinder, the cylinder body of the second oil cylinder is fixedly connected to one end of the second sliding groove 17, and the piston rod of the second oil cylinder is fixedly connected to the guide rail 18. Therefore, the connecting frame 6 can be directly driven to slide along the second sliding groove 17 by the second oil cylinder.

[0033] Lifting cylinders 8 are fixedly arranged on the front and rear sides of both the left and right ends of the spreader body 1. The piston rod of the lifting cylinder 8 is vertically downward and is provided with a lateral force sensor 9. The bottom end of the lateral force sensor 9 is provided with a rotary lock device 10 for connecting with the lifted piece. In addition, rotary lock brackets 11 are movably arranged below the left and right ends of the spreader body 1. Guide shafts 12 are vertically arranged on the top surface of the rotary lock brackets 11. Through holes 13 adapted to the guide shafts 12 are formed at the bottoms of both the left and right ends of the spreader body 1. Specifically, the through holes 13 are formed at the bottom of the second telescopic arm 103. A bearing seat 14 is fixedly arranged in the through hole 13. The bearing seat 14 and the guide shaft 12 are arranged on the same central axis. A spherical plain bearing 15 is fixedly arranged inside the bearing seat 14. The bearing seat 14 is of a cylindrical structure. The inner hole of the bearing seat 14 is of a three-stage stepped shape. The inner hole of the bearing seat 14 is successively a first stepped hole 1401, a second stepped hole 1402, and a third stepped hole 1403 from bottom to top. The outer ring of the spherical plain bearing 15 is fixedly connected to the inner wall of the first stepped hole 1401. The top end of the inner ring of the spherical plain bearing 15 has a clearance fit with the junction of the second stepped hole 1402 and the third stepped hole 1403 for limiting the deflection angle of the inner ring of the spherical plain bearing 15. When the deflection angle of the inner ring of the spherical plain bearing 15 is relatively large, the top end of the inner ring of the spherical plain bearing 15 will abut against the inner wall of the bearing seat 14. Therefore, the deflection angle of the inner ring of the spherical plain bearing 15 can be limited. A conical guide 1201 in the shape of a frustum of a cone is integrally formed at the top end of the guide shaft 12. Mounting ears 1202 are uniformly arranged on the outer periphery of the bottom of the guide shaft 12. The mounting ears 1202 and the bottom end of the guide shaft 12 are welded and fixed to the top surface of the rotary lock bracket 11. When the top of the guide shaft 12 is inserted into the inside of the spherical plain bearing 15, the inner ring of the spherical plain bearing 15 has a clearance fit with the guide shaft 12.

[0034] The spreader body 1 is also provided with a controller. The signal output end of the lateral force sensor 9 is electrically connected to the signal input end of the controller. The signal output end of the controller is electrically connected to the second driving mechanism 7. The controller can start the second driving mechanism 7 to make corresponding actions according to the detection signal fed back by the lateral force sensor 9.

[0035] In this embodiment, the connecting frame 6 is connected to the lifting arm of the transfer vehicle, and the rotary lock device 10 is connected to the suspended load. During the transfer process, since the lifting tool bears the huge gravity of the suspended load, the structure connecting and bearing the lifting tool will produce a certain degree of deflection deformation. As a result, the lifting oil cylinder 8 changes from a vertical state to a non-vertical state, and the relative attitude of the lifting tool body 1 and the suspended load deflects. Therefore, an additional load will be imposed on the lifting tool and the suspended load. The lateral force sensor 9 is used to monitor in real time the lateral force generated by the lifting oil cylinder 8 due to deflection deformation, and send the monitoring signal to the controller. The controller then activates the second driving mechanism 7 to make corresponding actions to compensate for the influence of the deflection deformation of the lifting tool body 1 on the suspended load, that is, the risk of damage to the suspended load and the lifting tool is reduced, so as to achieve the purpose of accurate transfer. In addition, a guide shaft 12 is provided on the top surface of the rotary lock frame 11. When the suspended load is lifted to the highest position, the guide shaft 12 will automatically be inserted into the spherical plain bearing 15. At this time, the rotary lock frame 11 cooperates with the second telescopic arm 103 to reduce the impact force generated on the lifting oil cylinder 8 due to acceleration and deceleration during the high-speed transfer of the suspended load. Therefore, it is beneficial to protect the lifting tool body 1.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting device for a transfer vehicle, comprising a lifting device body (1) with a telescopic length, characterized in that: A sliding frame (2) is slidably connected to the middle section of the top of the spreader body (1), and a first driving mechanism (4) for driving the sliding frame (2) to slide transversely is fixedly arranged. A slewing platform (5) is rotatably connected to the top surface of the sliding frame (2). A connecting frame (6) is slidably arranged on the top surface of the slewing platform (5), and a second driving mechanism (7) for driving the connecting frame (6) to slide longitudinally is fixedly arranged. The connecting frame (6) is used to be connected to the boom of the transfer vehicle. Lifting cylinders (8) are fixedly arranged on the front and rear sides of the left and right ends of the spreader body (1). The piston rods of the lifting cylinders (8) face vertically downward and are provided with lateral force sensors (9). A rotary locking device (10) for connecting with a suspended load is arranged at the bottom end of the lateral force sensor (9). The spreader body (1) is also provided with a controller. The signal output end of the lateral force sensor (9) is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the second driving mechanism (7). Rotary locking frames (11) are movably arranged below the left and right ends of the spreader body (1). Guide shafts (12) are vertically arranged on the top surfaces of the rotary locking frames (11). Through holes (13) adapted to the guide shafts (12) are formed at the bottoms of the left and right ends of the spreader body (1). Bearing seats (14) are fixedly arranged in the through holes (13). The bearing seats (14) and the guide shafts (12) are arranged on the same central axis. A spherical plain bearing (15) is fixedly arranged inside the bearing seats (14). The inner ring of the spherical plain bearing (15) has a clearance fit with the guide shaft (12).

2. The spreader device for a transfer vehicle according to claim 1, characterized in that: The bearing seat (14) has a cylindrical structure. The inner hole of the bearing seat (14) is of a three-stage stepped shape. The inner hole of the bearing seat (14) is successively a first stepped hole (1401), a second stepped hole (1402), and a third stepped hole (1403) from bottom to top. The outer ring of the spherical plain bearing (15) is fixedly connected to the inner wall of the first stepped hole (1401). The top end of the inner ring of the spherical plain bearing (15) has a clearance fit with the junction of the second stepped hole (1402) and the third stepped hole (1403) to limit the deflection angle of the inner ring of the spherical plain bearing (15).

3. The spreader device for a transfer vehicle according to claim 1, characterized in that: A conical guide (1201) in the shape of a frustum of a cone is integrally formed at the top end of the guide shaft (12). Mounting ears (1202) are uniformly arranged on the outer periphery of the bottom of the guide shaft (12). The mounting ears (1202) and the bottom end of the guide shaft (12) are fixedly welded to the top surface of the rotary locking frame (11).

4. The spreader device for a transfer vehicle according to claim 1, wherein: The spreader body (1) includes a fixed arm (101) and first telescopic arms (102) fixedly arranged at the left and right ends of the fixed arm (101). The first telescopic arms (102) are of a hollow structure. Second telescopic arms (103) are inserted into the two first telescopic arms (102). One end of the second telescopic arm (103) extends to the outside of the first telescopic arm (102).

5. The spreader device for a transfer vehicle according to claim 4, characterized in that: Both the front and rear sides inside the sliding frame (2) are provided with first sliding grooves (3) distributed transversely, and the front and rear sides of the top of the fixed arm (101) are respectively in sliding fit with the two first sliding grooves (3) inside the sliding frame (2); the first driving mechanism (4) uses a first oil cylinder, the cylinder body of the first oil cylinder is fixedly connected to the fixed arm (101), and the piston rod of the first oil cylinder is connected to the sliding frame (2).

6. The spreader device for a transfer vehicle according to claim 4, characterized in that: Both sides of the top surface of the slewing platform (5) are symmetrically provided with second sliding grooves (17) distributed longitudinally, both sides of the bottom end of the connecting frame (6) are provided with guide rails (18) adapted to the second sliding grooves (17), and the guide rails (18) are in sliding fit with the second sliding grooves (17); the second driving mechanism (7) uses a second oil cylinder, the cylinder body of the second oil cylinder is fixedly connected to one end of the second sliding groove (17), and the piston rod of the second oil cylinder is fixedly connected to the guide rail (18).

7. The spreader device for a transfer vehicle according to claim 4, characterized in that: The top surface of the sliding frame (2) is provided with a slewing disc (19), the top surface of the slewing disc (19) is fixedly provided with a slewing mechanism (16), and the rotation axis of the slewing mechanism (16) is fixedly connected to the slewing platform (5).

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