A portable emergency rescue crane

Abstract

The present invention relates to the technical field of cranes, and discloses a portable emergency rescue crane, comprising a lifting arm, a load-bearing plate installed at the bottom of the lifting arm, movable devices installed on both sides of the bottom of the load-bearing plate, a support device provided at the bottom of the load-bearing plate, and a transmission member provided between the support device and the movable device; the movable device comprises a support plate and a universal wheel, a driving member is provided in the support plate, the support device comprises a pressure plate and a universal ball, and a control member is provided in the pressure plate. The present invention makes the mobility of the device unrestricted by the provision of the universal wheel, and the retraction of the pressure plate and the lifting arm reduces the space occupied by the device. The reduction in the area occupied by the equipment space and the unrestricted mobility make the device more portable, and solve the problem that light and small lifting equipment needs to be fixed in place when working, which limits the mobility of the equipment and the lack of portability.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, in particular to a portable emergency rescue crane. Background Art

[0002] A crane refers to a multi-action lifting machinery that vertically lifts and horizontally carries heavy objects within a certain range. The working characteristic of the lifting equipment is intermittent movement, that is, the corresponding mechanisms of material picking, transportation, unloading and other actions work alternately in one working cycle. The characteristics of light and small lifting equipment are lightness, compact structure, simple movement, and the working range projection is mainly in the form of points and lines. Light and small lifting equipment generally has only one lifting mechanism, which can only make heavy objects perform a single lifting movement. At the same time, in order to ensure the stability of the equipment, the lifting equipment needs to be fixed in place when it is working. The mobility of the equipment is restricted and its portability is insufficient. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0004] A portable emergency rescue crane comprises a lifting arm, a bearing plate is mounted on the bottom of the lifting arm, moving devices are mounted on both sides of the bottom of the bearing plate, a supporting device is provided at the bottom of the bearing plate, and a transmission member is provided between the supporting device and the moving device;

[0005] The moving device includes a support plate and a universal wheel. A driving member is provided in the support plate. The driving member transmits power to the transmission member. The driving member drives the universal wheel to be retracted into the support plate.

[0006] The support device includes a pressure plate and a universal ball. The two pressure plates are arranged side by side at the bottom of the bearing plate and are slidably connected to the bearing plate. A control member is provided in the pressure plate. The control member is powered by a transmission member, and the control member drives the universal ball to be stored in the pressure plate.

[0007] Power is transmitted between the lifting arm and the pressure plate, so that when the lifting arm is unfolded, the pressure plate is driven to move at the bottom of the bearing plate;

[0008] The transmission member drives the driving member and the control member to operate simultaneously.

[0009] Preferably, a rotating part is provided between the lifting mechanical arm and the load-bearing plate to drive the lifting mechanical arm to rotate, the rotating part includes a servo motor, a base is fixedly connected to the top of the load-bearing plate, the servo motor is fixedly installed on the base, a turntable is fixedly connected to the bottom of the lifting mechanical arm, the turntable is embedded in the base and is rotatably connected to the base, two transmission wheels are rotatably connected to the base through bearings, a transmission belt is provided on the outer periphery of the two transmission wheels, one of the transmission wheels is fixedly connected to the turntable, and the other transmission wheel is fixedly connected to the output end of the servo motor.

[0010] Preferably, the lifting mechanical arm includes a lifting wheel and an electromagnetic suction cup fixedly connected to each other, and an articulated frame is provided at the top of the lifting mechanical arm. The lifting wheel and the electromagnetic suction cup are movably hinged to the articulated frame and a first cylinder is installed at the hinge. A telescopic rod is fixedly connected between the lifting mechanical arm and the articulated frame, and a second cylinder is fixedly installed in the lifting mechanical arm. The output end of the second cylinder is fixedly connected to a piston rod, and the piston rod is fixedly connected to the telescopic rod.

[0011] Preferably, the driving member includes a first reciprocating screw, a sliding groove is provided on the support plate, and a loading plate is slidably connected in the sliding groove, two first reciprocating screws are arranged in the sliding groove and are rotatably connected to the support plate through bearings, and the loading plate is assembled on the first reciprocating screw by threads, and rectangular holes are provided on both sides of the bottom of the support plate, and the two universal wheels are provided in the rectangular holes and fixedly installed on the bottom of the loading plate, the top of the first reciprocating screw extends into the bearing plate, and the top of the first reciprocating screw is fixedly connected to the first worm gear, and the bearing plate is rotatably connected to a rotating rod through a bearing, and the first worm is fixedly connected on both sides of the outer periphery of the rotating rod, and the first worm is meshed with the first worm gear.

[0012] Preferably, guide rail grooves are provided on both sides of the bottom of the load-bearing plate, and circular guide blocks are fixedly connected on both sides of the top of the pressure plate. The circular guide blocks are slidably arranged in the guide rail grooves, and the ends of the two pressure plates in the same direction are arranged into arc surfaces. The ends of the two pressure plates in the same direction are provided with mutually meshing tooth grooves, so that when one of the pressure plates rotates, it drives the other pressure plate to rotate in the opposite direction.

[0013] Preferably, a groove is provided at the bottom of the inner cavity of the guide rail groove, a limit block is slidably provided in the groove, the bottom edge of the limit block is set to an arc surface, a spring is fixedly connected to the top of the limit block, and a limit groove is provided on the top of the circular guide block, and the limit block is consistent with the limit groove.

[0014] Preferably, the control member includes a second reciprocating screw, a sliding groove is provided on the pressure plate, a movable plate is slidably connected in the sliding groove, the movable plate is assembled on the second reciprocating screw by means of threads, circular holes are provided on both sides of the bottom of the pressure plate, the universal ball is arranged in the circular hole and fixedly mounted on the bottom of the movable plate.

[0015] Preferably, the transmission member includes a movable rod, which is arranged in the load-bearing plate and is rotatably connected to the load-bearing plate through a bearing, a second worm gear is fixedly connected to the middle part of the outer periphery of the rotating rod, a second worm gear is fixedly connected to both sides of the outer periphery of the movable rod, the second worm gear is meshingly connected to the second worm gear, a first gear is fixedly connected to both sides of the outer periphery of the movable rod, the outer periphery of the first gear extends into the guide rail groove, and a first tooth plate is fixedly connected to both sides of the top of the pressure plate, and the first tooth plate is meshingly connected to the first gear.

[0016] Preferably, the transmission member also includes a second tooth plate, a support plate is fixedly connected to the bottom of the pressure plate, an extension rod is fixedly connected to the bottom of the second reciprocating screw rod, the extension rod is rotatably connected to the support plate through a bearing, a second gear is rotatably connected between the support plate and the pressure plate through a bearing, an annular groove is provided on the outer periphery of the second gear and the extension rod, a transmission belt is provided on the outer periphery of the extension rod and the second gear, the transmission belt is provided in the annular groove, the second tooth plate is fixedly mounted on one side of the support plate, and the second tooth plate is meshed with the second gear.

[0017] Preferably, both sides of the articulated frame are fixedly connected with a third cylinder, and the output end of the third cylinder is fixedly connected with a circular plate, and the circular plate is consistent with the limiting groove.

[0018] Compared with the prior art, the present invention provides a portable emergency rescue crane with the following beneficial effects:

[0019] 1. A portable emergency rescue crane. During the retraction process of the lifting arm, the two pressure plates are driven to move toward the bottom of the load-bearing plate. During the movement of the pressure plates, the transmission part operates and causes the driving part and the control part to operate at the same time. The control part drives the universal ball to move into the pressure plate and be stored. At the same time, the driving part drives the universal wheel to move outward from the bottom of the support plate and causes the universal wheel to contact the ground. Through the setting of the universal wheel, the mobility of the device is not restricted, and the retraction of the pressure plate and the lifting arm reduces the space occupied by the device. The reduction in the equipment space occupied and the unrestricted mobility make the device more portable, and solve the problem that light and small lifting equipment needs to be fixed in place when working, the mobility of the equipment is restricted, and the portability is insufficient.

[0020] 2. A portable emergency rescue crane. When the crane arm is deployed, it drives the two pressure plates to move outward from the load-bearing plate. During the movement of the pressure plates, the transmission part operates and causes the driving part and the control part to operate at the same time. The driving part drives the universal wheel at the bottom of the support plate to move into the support plate and be stored in the support plate, so that the bottom of the support plate contacts the ground. At the same time, the control part operates, and the control part drives the universal ball at the bottom of the pressure plate to move outward, so that the universal ball contacts the ground. Through the setting of the teeth and grooves that mesh with each other at the ends of the two pressure plates and the characteristics of the universal ball, the two pressure plates move outward in a fan-shaped trajectory, thereby increasing the support surface of the device. The stability of the equipment is related to the height of the center of gravity and the size of the support surface. The lower the center of gravity, the larger the support surface and the more stable it is. The center of gravity of the crane remains unchanged. By increasing the support surface of the crane, the stability of the crane during operation is enhanced.

[0021] 3. A portable emergency rescue crane, which is equipped with a circular plate on the articulated frame at the end of the lifting arm and a matching groove on the top of the circular guide block on the pressure plate, so that before the device works, the second cylinder drives the telescopic rod to operate, thereby driving the articulated frame to move forward, and then drives the pressure plate forward through the circular plate. When the circular guide block at the other end of the top of the pressure plate coincides with the limiting groove, the lifting arm drives the circular plate to disengage from the circular guide block, so that when the lifting arm works in one direction, the forward direction of the pressure plate is the same as the extension direction of the lifting arm, thereby increasing the support surface of the bottom of the lifting arm, preventing the crane from tilting or even falling due to the hoisted object being too far away from the crane support point when the crane is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the overall structural diagrams of the present invention;

[0023] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the rotating member of the present invention;

[0025] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of the middle part A;

[0026] Figure 5 It is a schematic structural diagram of the mobile device of the present invention;

[0027] Figure 6 It is a schematic diagram of the transmission member and the driving member structure of the present invention;

[0028] Figure 7 It is a schematic diagram of the transmission part and control part structure of the present invention;

[0029] Figure 8For the present invention Figure 7 Schematic diagram of the structure of the middle part B;

[0030] Figure 9 This is a schematic diagram of the bottom structure of the load-bearing plate of the present invention;

[0031] Figure 10 For the present invention Figure 9 Schematic diagram of the structure of part C in the middle.

[0032] In the figure: 1. Lifting arm; 2. Load-bearing plate; 3. Moving device; 4. Support device; 5. Transmission member; 31. Support plate; 32. Universal wheel; 33. Driving member; 41. Pressure plate; 42. Universal ball; 43. Control member; 6. Rotating member; 61. Servo motor; 62. Base; 63. Turntable; 64. Transmission wheel; 65. Transmission belt; 101. Lifting wheel; 102. Electromagnetic suction cup; 103. Articulated frame; 104. First cylinder; 105. Telescopic rod; 106. Second cylinder; 107. Piston rod; 331. First reciprocating screw; 332. Slide; 33 3. Loading plate; 334. First worm gear; 335. Rotating rod; 336. First worm; 7. Guide rail groove; 8. Circular guide block; 9. Tooth groove; 10. Groove; 11. Limit block; 12. Spring; 13. Limit groove; 14. Third cylinder; 15. Circular plate; 431. Second reciprocating screw; 432. Sliding groove; 433. Movable plate; 51. Movable rod; 52. Second worm gear; 53. Second worm; 54. First gear; 55. First tooth plate; 56. Second tooth plate; 57. Support plate; 58. Extension rod; 59. Second gear; 510. Annular groove; 511. Transmission belt. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] As introduced in the background technology, there are deficiencies in the existing technology. In order to solve the above technical problems, this application proposes a portable emergency rescue crane.

[0035] Example 1:

[0036] See also Figure 1-Figure 2 A portable emergency rescue crane comprises a lifting arm 1, a bearing plate 2 is mounted on the bottom of the lifting arm 1, moving devices 3 are mounted on both sides of the bottom of the bearing plate 2, a supporting device 4 is provided at the bottom of the bearing plate 2, and a transmission member 5 is provided between the supporting device 4 and the moving device 3;

[0037] The moving device 3 includes a support plate 31 and a universal wheel 32. A driving member 33 is provided in the support plate 31. The driving member 33 is powered by the transmission member 5. The driving member 33 drives the universal wheel 32 to be stored in the support plate 31.

[0038] The support device 4 includes a pressure plate 41 and a universal ball 42. The two pressure plates 41 are arranged side by side at the bottom of the bearing plate 2 and are slidably connected to the bearing plate 2. A control member 43 is provided in the pressure plate 41. The control member 43 is powered by the transmission member 5. The control member 43 drives the universal ball 42 to be stored in the pressure plate 41.

[0039] Power is transmitted between the lifting arm 1 and the pressure plate 41 so that when the lifting arm 1 is unfolded, the pressure plate 41 is driven to move at the bottom of the bearing plate 2;

[0040] The transmission member 5 drives the driving member 33 and the control member 43 to operate simultaneously.

[0041] Specifically, after the lifting mechanical arm 1 completes its work, the lifting mechanical arm 1 retracts and contacts the pressure plate 41, and the lifting mechanical arm 1 drives the pressure plate 41 to move toward the bottom of the bearing plate 2. During the movement of the pressure plate 41 toward the bottom of the bearing plate 2, the transmission member 5 operates, and through the power transmission between the transmission member 5 and the driving member 33 and the control member 43, the driving member 33 and the control member 43 are driven to operate simultaneously, and the control member 43 drives the universal ball 42 to move toward the pressure plate 41 and be stored in the pressure plate 41. At the same time, the driving member 33 drives the universal wheel 32 to move toward the bottom of the support plate 31, and moves out of the support plate 31 to contact the ground. During this process, the mechanical arm is in a retracted and folded state, and the pressure plate 41 is stored in the bottom of the bearing plate 2, which greatly reduces the occupied space of the device, and the arrangement of the universal wheel 32 facilitates the movement of the device.

[0042] During the retraction process, the lifting mechanical arm 1 drives the two pressure plates 41 to move toward the bottom of the load-bearing plate 2. During the movement of the pressure plate 41, the transmission member 5 operates and causes the driving member 33 and the control member 43 to operate simultaneously. The control member 43 drives the universal ball 42 to move into the pressure plate 41 and be stored. At the same time, the driving member 33 drives the universal wheel 32 to move outward from the bottom of the support plate 31 and causes the universal wheel 32 to contact the ground. Through the setting of the universal wheel 32, the mobility of the device is not restricted, and the retraction of the pressure plate 41 and the lifting mechanical arm 1 reduces the space occupied by the device. The reduction in the equipment space occupied and the unrestricted mobility make the device more portable, which solves the problem that light and small lifting equipment needs to be fixed in place when working, the mobility of the equipment is restricted, and the portability is insufficient.

[0043] Example 2:

[0044] The difference from the above embodiment 1 is that, see Figure 3 For the above-mentioned lifting mechanical arm 1, a rotating member 6 is provided between the lifting mechanical arm 1 and the bearing plate 2 to drive the lifting mechanical arm 1 to rotate. The rotating member 6 includes a servo motor 61. A base 62 is fixedly connected to the top of the bearing plate 2. The servo motor 61 is fixedly mounted on the base 62. A turntable 63 is fixedly connected to the bottom of the lifting mechanical arm 1. The turntable 63 is embedded in the base 62 and is rotatably connected to the base 62. Two transmission wheels 64 are rotatably connected to the base 62 through bearings. A transmission belt 65 is provided on the outer circumference of the two transmission wheels 64. One of the transmission wheels 64 is fixedly connected to the turntable 63, and the other transmission wheel 64 is fixedly connected to the output end of the servo motor 61.

[0045] Specifically, when the angle of the lifting arm 1 needs to be adjusted, the servo motor 61 runs, driving one of the transmission wheels 64 to rotate, and through the setting of the transmission belt 65, driving the other transmission wheel 64 to rotate, thereby driving the turntable 63 and the lifting arm 1 on the turntable 63 to rotate, and then adjusting the position of the lifting arm 1.

[0046] Example 3:

[0047] The difference from the above embodiment 2 is that, see Figure 2-Figure 4 、 Figure 9-10 For the above-mentioned lifting mechanical arm 1, the lifting mechanical arm 1 includes a lifting wheel 101 and an electromagnetic suction cup 102 fixedly connected to each other. A hinged frame 103 is provided at the top of the lifting mechanical arm 1. The lifting wheel 101 and the electromagnetic suction cup 102 are both movably hinged to the hinged frame 103, and a first cylinder 104 is installed at the hinge. A telescopic rod 105 is fixedly connected between the lifting mechanical arm 1 and the hinged frame 103. A second cylinder 106 is fixedly installed in the lifting mechanical arm 1. The output end of the second cylinder 106 is fixedly connected to a piston rod 107, and the piston rod 107 is fixedly connected to the telescopic rod 105.

[0048] Guide rail grooves 7 are provided on both sides of the bottom of the load-bearing plate 2, and circular guide blocks 8 are fixedly connected to both sides of the top of the pressure plate 41. The circular guide blocks 8 are slidably arranged in the guide rail grooves 7. The ends of the two pressure plates 41 in the same direction are both configured as arc surfaces. The ends of the two pressure plates 41 in the same direction are both provided with mutually meshing tooth grooves 9, so that when one pressure plate 41 rotates, the other pressure plate 41 is driven to rotate in the opposite direction.

[0049] A groove 10 is provided at the bottom of the inner cavity of the guide rail groove 7, and a limit block 11 is slidably provided in the groove 10. The bottom edge of the limit block 11 is set into an arc surface, and a spring 12 is fixedly connected to the top of the limit block 11. A limit groove 13 is provided on the top of the circular guide block 8, and the limit block 11 is consistent with the limit groove 13;

[0050] The third cylinder 14 is fixedly connected to both sides of the articulated frame 103. The output end of the third cylinder 14 is fixedly connected to a circular plate 15. The circular plate 15 is consistent with the limiting groove 13.

[0051] Specifically, when the lifting mechanical arm 1 is unfolded, the telescopic rod 105 is extended by the second cylinder 106, thereby driving the articulated frame 103 to move forward. Through the fit between the circular plate 15 and the limit groove 13, when the articulated frame 103 moves forward, the circular plate 15 drives the circular guide block 8 to move forward, thereby driving the pressure plate 41 to move forward. When the circular guide block 8 located in the guide rail groove 7 moves to the bottom of the limit block 11 close to the direction of the articulated frame 103, the circular guide block 8 squeezes the limit block 11, thereby driving the limit block 11 to move upward and putting the spring 12 in a squeezed state. When the circular guide block 8 moves to just below the limit block 11, the limit block 11 is located just above the limit groove 13 at the top of the circular guide block 8, the spring 12 restores its elasticity, and drives the limit block 11 and The limiting grooves 13 overlap, and at this time the second cylinder 106 no longer drives the telescopic rod 105 to move forward. At the same time, the third cylinder 14 drives the circular plate 15 to disengage from the limiting groove 13, and the lifting arm 1 rotates upward. When the circular guide block 8 on the pressure plate 41 overlaps with the limiting block 11, the tooth grooves 9 at the ends of the two pressure plates 41 are engaged with each other, driving one of the pressure plates 41 to rotate to one side, thereby driving the two pressure plates 41 to rotate in opposite directions, so that the two pressure plates 41 move outward in a fan-shaped trajectory, thereby increasing the support surface of the device. The stability of the equipment is related to the height of the center of gravity and the size of the support surface. The lower the center of gravity, the larger the support surface, the more stable it is. The center of gravity of the crane remains unchanged. By increasing the support surface of the crane, the stability of the crane during operation is enhanced.

[0052] Example 4:

[0053] The difference from the above embodiment 3 is that, see Figure 5-Figure 8 The cam 332 is provided on the support plate 31, and the loading plate 333 is slidably connected in the cam 332. The two first reciprocating screw rods 331 are arranged in the cam 332 and are rotatably connected to the support plate 31 through bearings. The loading plate 333 is assembled on the first reciprocating screw rod 331 by threads. Rectangular holes are provided on both sides of the bottom of the support plate 31. Two universal wheels 32 are provided in the rectangular holes and are fixedly mounted on the bottom of the loading plate 333. The top of the first reciprocating screw rod 331 extends into the bearing plate 2. The top of the first reciprocating screw rod 331 is fixedly connected to the first worm gear 334. The bearing plate 2 is rotatably connected to a rotating rod 335. The outer periphery of the rotating rod 335 is fixedly connected to the first worm 336. The first worm 336 is meshed with the first worm gear 334.

[0054] Specifically, the transmission member 5 drives the rotating rod 335 to rotate, and through the meshing connection between the first worm 336 and the first worm gear 334 at both ends of the rotating rod 335, drives the first worm gear 334 to rotate, thereby driving the first reciprocating screw rod 331 to rotate, and through the threaded connection between the first reciprocating screw rod 331 and the loading plate 333, drives the loading plate 333 to move up and down in the slide groove 332, thereby controlling the storage of the universal wheel 32 in the support plate 31.

[0055] Embodiment 5:

[0056] The difference from the above-mentioned fourth embodiment is that, see Figure 5-Figure 8 As for the control member 43, the control member 43 includes a second reciprocating screw 431, a sliding groove 432 is provided on the pressure plate 41, a movable plate 433 is slidably connected in the sliding groove 432, and the movable plate 433 is assembled on the second reciprocating screw 431 through a thread. Circular holes are provided on both sides of the bottom of the pressure plate 41, and the universal ball 42 is arranged in the circular holes and fixedly mounted on the bottom of the movable plate 433;

[0057] Specifically, the transmission member 5 drives the second reciprocating screw 431 to rotate, and through the threaded connection between the second reciprocating screw 431 and the movable plate 433 , drives the movable plate 433 to move upward, thereby controlling the storage of the universal ball 42 in the pressure plate 41 .

[0058] Example 6:

[0059] The difference from the above embodiment 5 is that, see Figure 5-Figure 8 , as for the above-mentioned transmission member 5, the transmission member 5 includes a movable rod 51, the movable rod 51 is arranged in the bearing plate 2 and is rotatably connected to the bearing plate 2 through a bearing, a second worm gear 52 is fixedly connected to the middle part of the outer periphery of the rotating rod 335, and a second worm 53 is fixedly connected to both sides of the outer periphery of the movable rod 51, and the second worm 53 is meshed with the second worm gear 52. A first gear 54 is fixedly connected to both sides of the outer periphery of the movable rod 51, and the outer periphery of the first gear 54 extends into the guide rail groove 7. A first tooth plate 55 is fixedly connected to both sides of the top of the pressure plate 41, and the first tooth plate 55 is meshed with the first gear 54;

[0060] The transmission member 5 also includes a second toothed plate 56. A support plate 57 is fixedly connected to the bottom of the pressure plate 41. An extension rod 58 is fixedly connected to the bottom of the second reciprocating screw 431. The extension rod 58 is rotatably connected to the support plate 57 through a bearing. A second gear 59 is rotatably connected between the support plate 57 and the pressure plate 41 through a bearing. An annular groove 510 is formed on the outer periphery of the second gear 59 and the extension rod 58. A transmission belt 511 is sleeved on the outer periphery of the extension rod 58 and the second gear 59. The transmission belt 511 is arranged in the annular groove 510. The second toothed plate 56 is fixedly mounted on one side of the support plate 31 and is meshed with the second gear 59.

[0061] Specifically, during the movement of the pressure plate 41, the first toothed plate 55 on the top of the pressure plate 41 moves and meshes with the first gear 54. The meshing connection between the first toothed plate 55 and the first gear 54 causes the first toothed plate 55 to rotate during its movement, thereby driving the movable rod 51 to rotate. The rotation of the movable rod 51 drives the second worm gears 53 at both ends to rotate. The meshing connection between the second worm gear 53 and the second worm gear 52 drives the second worm gear 52 to rotate, thereby driving the rotating rod 335 fixedly connected to the second worm gear 52 to rotate, thereby driving the driving member 33 to operate.

[0062] At the same time, during the movement of the pressure plate 41, the second gear 59 at the bottom of the pressure plate 41 contacts the second tooth plate 56. Through the meshing connection between the second gear 59 and the second tooth plate 56, the pressure plate 41 drives the second gear 59 to rotate during the movement. Through the cooperation between the second gear 59 and the annular groove 510 on the outer periphery of the extension rod 58 and the transmission belt 511, when the second gear 59 rotates, it drives the extension rod 58 to rotate, thereby driving the second reciprocating screw 431 to rotate, and then driving the control component 43 to operate.

[0063] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A portable emergency rescue crane, comprising a lifting arm, characterized in that: A bearing plate is installed at the bottom of the lifting arm, moving devices are installed on both sides of the bottom of the bearing plate, a supporting device is provided at the bottom of the bearing plate, and a transmission member is provided between the supporting device and the moving device; The moving device includes a support plate and a universal wheel. A driving member is provided in the support plate. The driving member transmits power to the transmission member. The driving member drives the universal wheel to be retracted into the support plate. The support device includes a pressure plate and a universal ball. The two pressure plates are arranged side by side at the bottom of the bearing plate and are slidably connected to the bearing plate. A control member is provided in the pressure plate. The control member is powered by a transmission member, and the control member drives the universal ball to be stored in the pressure plate. Power is transmitted between the lifting arm and the pressure plate, so that when the lifting arm is unfolded, the pressure plate is driven to move at the bottom of the bearing plate; The transmission member drives the driving member and the control member to operate simultaneously.

2. The portable emergency rescue crane according to claim 1, characterized in that: A rotating part is provided between the lifting mechanical arm and the load-bearing plate, which drives the lifting mechanical arm to rotate. The rotating part includes a servo motor. A base is fixedly connected to the top of the load-bearing plate, and the servo motor is fixedly installed on the base. A turntable is fixedly connected to the bottom of the lifting mechanical arm. The turntable is embedded in the base and is rotatably connected to the base. Two transmission wheels are rotatably connected to the base through bearings. A transmission belt is provided on the outer periphery of the two transmission wheels. One of the transmission wheels is fixedly connected to the turntable, and the other transmission wheel is fixedly connected to the output end of the servo motor.

3. The portable emergency rescue crane according to claim 2, characterized in that: The lifting mechanical arm includes a lifting wheel and an electromagnetic suction cup fixedly connected to each other. An articulated frame is provided at the top of the lifting mechanical arm. The lifting wheel and the electromagnetic suction cup are movably hinged to the articulated frame and a first cylinder is installed at the hinge. A telescopic rod is fixedly connected between the lifting mechanical arm and the articulated frame. A second cylinder is fixedly installed in the lifting mechanical arm. The output end of the second cylinder is fixedly connected to a piston rod, and the piston rod is fixedly connected to the telescopic rod.

4. The portable emergency rescue crane according to claim 3, characterized in that: The driving member includes a first reciprocating screw, and the support plate is provided with a slide groove, and a loading plate is slidably connected in the slide groove. The two first reciprocating screws are arranged in the slide groove and are rotatably connected to the support plate through bearings. The loading plate is assembled on the first reciprocating screw by threads, and rectangular holes are provided on both sides of the bottom of the support plate. The two universal wheels are provided in the rectangular holes and fixedly installed on the bottom of the loading plate. The top of the first reciprocating screw extends into the bearing plate, and the top of the first reciprocating screw is fixedly connected to the first worm gear. The bearing plate is rotatably connected to a rotating rod through a bearing, and the first worm is fixedly connected on both sides of the outer periphery of the rotating rod, and the first worm is meshed with the first worm gear.

5. The portable emergency rescue crane according to claim 4, characterized in that: Guide rail grooves are provided on both sides of the bottom of the load-bearing plate, and circular guide blocks are fixedly connected on both sides of the top of the pressure plate. The circular guide blocks are slidably arranged in the guide rail grooves. The ends of the two pressure plates in the same direction are arranged into arc surfaces, and the ends of the two pressure plates in the same direction are provided with mutually meshing tooth grooves, so that when one of the pressure plates rotates, the other pressure plate is driven to rotate in the opposite direction.

6. The portable emergency rescue crane according to claim 5, characterized in that: A groove is provided at the bottom of the inner cavity of the guide rail groove, a limit block is slidably provided in the groove, the bottom edge of the limit block is set to an arc surface, a spring is fixedly connected to the top of the limit block, a limit groove is provided on the top of the circular guide block, and the limit block is consistent with the limit groove.

7. The portable emergency rescue crane according to claim 6, characterized in that: The control component includes a second reciprocating screw, a sliding groove is provided on the pressure plate, a movable plate is slidably connected in the sliding groove, and the movable plate is assembled on the second reciprocating screw through threads. Circular holes are provided on both sides of the bottom of the pressure plate, and the universal ball is arranged in the circular hole and fixedly installed on the bottom of the movable plate.

8. The portable emergency rescue crane according to claim 7, characterized in that: The transmission member includes a movable rod, which is arranged in the load-bearing plate and is rotatably connected to the load-bearing plate through a bearing, a second worm gear is fixedly connected to the middle part of the outer periphery of the rotating rod, and a second worm gear is fixedly connected to both sides of the outer periphery of the movable rod, and the second worm gear is meshed with the second worm gear, and a first gear is fixedly connected to both sides of the outer periphery of the movable rod, and the outer periphery of the first gear extends into the guide rail groove, and a first tooth plate is fixedly connected to both sides of the top of the pressure plate, and the first tooth plate is meshed with the first gear.

9. The portable emergency rescue crane according to claim 8, characterized in that: The transmission member also includes a second tooth plate, a support plate is fixedly connected to the bottom of the pressure plate, an extension rod is fixedly connected to the bottom of the second reciprocating screw rod, the extension rod is rotatably connected to the support plate through a bearing, a second gear is rotatably connected between the support plate and the pressure plate through a bearing, an annular groove is provided on the outer periphery of the second gear and the extension rod, a transmission belt is provided on the outer periphery of the extension rod and the second gear, the transmission belt is provided in the annular groove, the second tooth plate is fixedly mounted on one side of the support plate, and the second tooth plate is meshed with the second gear.

10. The portable emergency rescue crane according to claim 9, characterized in that: The two sides of the articulated frame are both fixedly connected with a third cylinder, and the output end of the third cylinder is fixedly connected with a circular plate, and the circular plate is consistent with the limiting groove.

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