Special clamp type lifting appliance device for travelling wheel

Abstract

The invention relates to the technical field of lifting transportation equipment, in particular to a special clamp type lifting appliance device for a traveling wheel, which comprises a main body frame, a first lifting connecting piece, a second lifting connecting piece, a clamping mechanism and a locking mechanism, the main body frame comprises a first metal arm, a second metal arm, a third metal arm, a fourth metal arm and a pin shaft, through holes for the pin shaft to pass through are formed in two ends of the first metal arm and the second metal arm; through holes for the pin shaft to pass through are formed in one ends and hinging positions of the third metal arm and the fourth metal arm. According to the clamp type lifting appliance device special for the traveling wheel, a four-arm hinged linkage structure is adopted for a lifting appliance, the clamping claws can be driven to complete folding and unfolding actions by means of the lifting action of lifting equipment, an additional power device is not needed, operation is easy and efficient, the hook is hung on the positioning ring, the two clamping claws can be driven to be in an unfolding state all the time, and the lifting appliance is convenient to use. And the travelling wheel can conveniently enter the space between the two clamping claws.

Description

Technical Field

[0001] This invention relates to the field of lifting and transport equipment technology, and in particular to a clamp-type lifting device specifically for wheeled vehicles. Background Technology

[0002] In the field of industrial production and logistics handling, overhead cranes, as an important lifting and transportation equipment, are widely used in heavy lifting operations in workshops, warehouses and other places. In the production process of overhead crane wheels, the industry generally adopts the method of passing steel wire ropes through the small holes of the wheels for lifting. This method, with its simple operating principle and readily available tools, has met basic lifting needs for a certain period of time.

[0003] However, as industrial production demands increasingly higher efficiency, safety, and equipment lifespan, the drawbacks of this traditional hoisting method have become increasingly apparent, gradually becoming a bottleneck restricting operational quality and safety. Firstly, right-angle hoisting with wire ropes easily leads to fraying and broken wires. During hoisting, the wire rope must bear the weight of the wheel at a right angle. This stress concentration causes localized stress concentration in the wire rope, and repeated bending and friction easily lead to wire wear, fraying, and ultimately, wire breakage. Damage to the wire rope not only reduces its load-bearing capacity, shortens its service life, and increases equipment maintenance costs, but it may also suddenly break during hoisting, causing serious safety accidents such as the falling of heavy objects. Secondly, the small holes in the wheels are usually small, requiring operators to spend a significant amount of time and effort to accurately thread the wire rope through them, severely impacting operational efficiency.

[0004] Therefore, the present invention provides a clamp-type lifting device specifically for rolling wheels. Summary of the Invention

[0005] The purpose of this invention is to solve at least one technical problem mentioned in the background art.

[0006] This invention provides a special clamp-type lifting device for wheels, including a main frame, a first lifting connector, a second lifting connector, a clamping mechanism, and a locking mechanism. The main frame includes a first metal arm, a second metal arm, a third metal arm, a fourth metal arm, and a pin. Both ends of the first and second metal arms have through holes for the pin to pass through. One end and the hinge position of the third and fourth metal arms also have through holes for the pin to pass through. The first lifting connector is fixedly installed on the upper end of the first metal arm, and its surface has a lifting hole for the hook to be hung. The clamping mechanism includes clamping claws fixedly installed on the lower ends of the third and fourth metal arms respectively. The locking mechanism includes a lifting ring fixedly installed on the second metal arm, a positioning ring fixedly installed on the third metal arm, and a hook hinged to the lifting ring.

[0007] By adopting the above technical solution, the through holes at the upper ends of the first and second metal arms are aligned, pins are inserted and fixed, forming a rotatable upper hinge structure. Then, the third and fourth metal arms are crossed, their corresponding through holes aligned, and pins are inserted and fixed. Next, the through holes at the lower ends of the first and second metal arms are aligned with the through holes at the upper ends of the third and fourth metal arms, and pins are inserted and fixed. At this point, the four metal arms are interconnected via pins, forming a four-arm hinged frame structure that can move together. When the hook of the locking mechanism is attached to the positioning ring, the hook restricts the rotation of the third and fourth metal arms around the pin shaft, allowing the two clamping claws to move away from each other. At this time, the two clamping claws are in an open state. When it is necessary to lift the wheel, the hook needs to be removed from the positioning ring. At this time, by external force (such as the lifting action of the lifting equipment), the third and fourth metal arms can be rotated around the pin shaft, causing the lower clamping claws to retract inward. The wheel is clamped by the friction between the clamping claws and the wheel, thereby achieving the gripping of the wheel.

[0008] Preferably, the surface of the second hoisting connector is provided with a through hole for the pin shaft to pass through, and the clamping mechanism is replaced by an adjustable extended clamping assembly. The adjustable extended clamping assembly includes a first extended arm and a second extended arm, and adjustable grippers are respectively installed on the first extended arm and the second extended arm by an assembly assembly. One end of the first metal arm and the first extended arm, as well as the hinge position, are provided with a through hole for the pin shaft to pass through.

[0009] By adopting the above technical solution, the first metal arm and the second metal arm are placed into the second lifting connector, the through holes at their upper ends are aligned, pins are inserted and fixed, and the second lifting connector, the first metal arm and the second metal arm are integrated into a rotatable upper hinge structure. Then, the first extended arm and the second extended arm are crossed, the through holes at their hinge positions are aligned, and pins are inserted and fixed, forming a hinge structure of the first extended arm and the second extended arm. After that, the through holes at the lower ends of the first metal arm and the second metal arm are aligned with the through holes at the upper ends of the first extended arm and the second extended arm, and pins are inserted and fixed in sequence. At this time, the first metal arm, the second metal arm, the first extended arm and the second extended arm are connected to each other through pins to form a four-arm hinge frame structure that can be linked.

[0010] Preferably, the assembly component includes an assembly frame with multiple adjustment holes respectively opened on the surfaces of the first extended arm and the second extended arm. Two through holes are symmetrically opened on the surface of the assembly frame. Bolts are provided on the inner walls of the through holes. Nuts are threaded onto the surfaces of the bolts, and adjustable grippers are fixedly installed on the lower surface of the assembly frame.

[0011] By adopting the above technical solution, the assembly frame is aligned with the adjustment holes on the surfaces of the first and second extended arms. The two assembly frames are then fixed to the first and second extended arms respectively using bolts and nuts, thus completing the installation of the adjustable gripper. When it is necessary to lift the wheel, external force is used to drive the first and second extended arms to rotate around the pin shaft using the four-arm hinge structure. This causes the adjustable gripper at the lower end to retract inward. The friction between the adjustable gripper and the wheel clamps the wheel, thus completing the gripping of the wheel. Furthermore, the position of the assembly frame on the first and second extended arms can be adjusted using bolts and nuts according to the size of different wheel specifications, thereby changing the opening and closing width of the adjustable gripper to adapt to wheels of different diameters and improve the versatility of the lifting device.

[0012] Preferably, the locking mechanism is replaced by an automatic locking assembly, which includes a drive rod, a locking disc, a return spring, a limit pin, and a limit assembly disposed on the back of the second extended arm. A first pawl is fixedly installed at the lower end of the drive rod, and a first paddle and a second paddle are fixedly installed on the surface of the locking disc in a circumferential manner. A second pawl is fixedly installed at the end of the first paddle.

[0013] Preferably, a plurality of first and second paddles are spaced apart, and one end of the drive rod has a through hole for the pin shaft to pass through.

[0014] By adopting the above technical solution, the first metal arm and the second metal arm are placed inside the second lifting connector, and then the drive rod is placed on the front of the second lifting connector so that the through hole on the drive rod is aligned with the through hole on the second lifting connector. Then, the through holes at the upper ends of the first metal arm and the second metal arm are aligned, the pin is inserted and fixed, and the integrated assembly of the drive rod, the second lifting connector, the first metal arm and the second metal arm is completed. At this time, the drive rod can rotate smoothly around the pin.

[0015] Preferably, the limiting pin is installed on the front of the first extended arm, hooks are provided at both ends of the return spring, and hanging rings for hooks are fixedly installed on one side of the second metal arm and the second extended arm.

[0016] By adopting the above technical solution, the hooks on the return spring are respectively hung on the hanging rings on the second metal arm and the second extended arm. The elasticity of the return spring can drive the drive rod to always contact the limit pin, and the limit pin can limit the excessive rotation of the drive rod.

[0017] Preferably, the limiting component includes a mounting cylinder, a ratchet disposed inside the mounting cylinder, a protrusion disposed on the surface of the mounting cylinder, a pawl slidably engaged with the inner wall of the protrusion, and a compression spring disposed inside the protrusion, and a cover plate is detachably mounted on the back of the mounting cylinder by screws.

[0018] Preferably, the front of the ratchet is fixedly mounted with the shaft portion of the pin, and the back of the locking disc is fixedly mounted with the cotter pin portion of the pin.

[0019] By adopting the above technical solution, the first extended arm and the second extended arm are crossed and aligned with the through holes at their hinge positions. Then, the shaft part of the pin on the ratchet is inserted into the through hole, and the cotter pin part of the pin on the locking disc is inserted into the through hole. Then, the shaft part of the pin and the cotter pin part of the pin are fixed, so that the first extended arm, the second extended arm, the ratchet and the locking disc can be assembled into one unit. At this time, the rotation of the locking disc will drive the ratchet to rotate.

[0020] Preferably, the mounting cylinder and the second extended arm both have mounting holes on their back sides, and the two ends of the compression spring abut against the inner wall of the protrusion and one side of the pawl, respectively, with the pawl matching the tooth groove of the ratchet.

[0021] By adopting the above technical solution, the mounting cylinder can be fixed to the back of the second extended arm by using the mounting holes and fasteners. At this time, the pawl will be inserted into the tooth groove of the ratchet, and the pawl can restrict the ratchet from rotating counterclockwise, thereby restricting the locking disc from rotating counterclockwise.

[0022] Preferably, the inner surfaces of both the gripping claw and the adjustable gripper are provided with anti-slip textures, which are cross-shaped raised stripes.

[0023] By adopting the above technical solution, when the clamping claw and the adjustable clamping claw retract inward and contact the surface of the wheel, the anti-slip texture of the cross-shaped raised stripes will form multi-angle contact points with the surface of the wheel. Compared with a smooth surface, it can significantly increase the roughness of the contact surface and improve the static friction during the initial clamping stage.

[0024] In summary, the present invention has at least one of the following beneficial technical effects:

[0025] 1. The present invention provides a special clamping type lifting device for wheels. The lifting device adopts a four-arm hinged linkage structure. The lifting action of the lifting equipment can drive the clamping claws to complete the closing and opening action without the need for an additional power device. The operation is simple and efficient. Furthermore, by attaching the hook to the positioning ring, the two clamping claws can be kept in the open state at all times, which facilitates the wheel to enter between the two clamping claws.

[0026] 2. The wheel-mounted clamp-type lifting device of the present invention has a return spring in the automatic locking component that drives the drive rod to always contact the limit pin. The limit component can restrict the counterclockwise rotation of the locking disc. With the engaging and disengaging actions of the first and second jaws, reliable locking and unlocking of the adjustable jaws can be achieved. Moreover, the engaging and disengaging actions of the first and second jaws of the automatic locking component are linked with the lifting and lowering actions of the lifting equipment, eliminating the need for manual locking and unlocking and reducing the labor intensity of the operators.

[0027] 3. The wheel-specific clamping lifting device of the present invention can change the opening and closing width of the adjustable jaws by adjusting the position of the mounting frame on the first and second extended arms with bolts, so as to adapt to wheels of different diameters and broaden the application range of the lifting device. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention;

[0029] Figure 2 This is a three-dimensional structural schematic diagram of Embodiment 2 of the present invention;

[0030] Figure 3 This is a first-view three-dimensional structural diagram of Embodiment 3 of the present invention;

[0031] Figure 4 This is a second-view perspective three-dimensional structural schematic diagram of Embodiment 3 of the present invention;

[0032] Figure 5 This is a rear cross-sectional view of the limiting component according to Embodiment 3 of the present invention;

[0033] Figure 6 yes Figure 3 Enlarged structural diagram at point A in the middle;

[0034] Figure 7 This is a three-dimensional structural diagram of the drive rod according to Embodiment 3 of the present invention;

[0035] Figure 8 This is a three-dimensional structural diagram of the locking disc according to Embodiment 3 of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Main frame; 101. First metal arm; 102. Second metal arm; 103. Third metal arm; 104. Fourth metal arm;

[0038] 200. First lifting connector; 201. Lifting hole;

[0039] 300. Clamping mechanism; 301. Clamping claw;

[0040] 400. Locking mechanism; 401. Lifting ring; 402. Positioning ring; 403. Hook;

[0041] 500. Adjustable extended clamping assembly; 501. First extended arm; 502. Second extended arm; 503. Adjustable gripper; 504. Assembly frame; 505. Adjustment hole; 506. Bolt;

[0042] 600. Automatic locking assembly; 601. Drive rod; 602. Locking disc; 603. Return spring; 604. Limit pin; 605. First lever; 606. Second lever; 607. Second pawl; 608. Mounting cylinder; 609. Ratchet; 610. Protrusion; 611. Pawl; 612. Compression spring; 613. Cover plate; 614. First pawl;

[0043] 700. Second hoisting connector. Detailed Implementation

[0044] The following combination Figures 1 to 8 The present invention will be further described in detail below.

[0045] Example 1

[0046] Please refer to the following carefully. Figure 1 and Figure 2 A special clamp-type lifting device for wheels includes a main frame 100, a first lifting connector 200, a second lifting connector 700, a clamping mechanism 300, and a locking mechanism 400. The main frame 100 includes a first metal arm 101, a second metal arm 102, a third metal arm 103, a fourth metal arm 104, and a pin. Both ends of the first metal arm 101 and the second metal arm 102 have through holes for the pin to pass through. One end of the third metal arm 103 and the fourth metal arm 104 are hinged. All are provided with through holes for the pin shaft to pass through. The first lifting connector 200 is fixedly installed on the upper end of the first metal arm 101 and has a lifting hole 201 for the hook to be hung on. The clamping mechanism 300 includes clamping claws 301 fixedly installed on the lower ends of the third metal arm 103 and the fourth metal arm 104 respectively. The locking mechanism 400 includes a lifting ring 401 fixedly installed on the second metal arm 102, a positioning ring 402 fixedly installed on the third metal arm 103, and a hook 403 hinged to the lifting ring 401.

[0047] Specifically, the through holes at the upper ends of the first metal arm 101 and the second metal arm 102 are aligned, and pins are inserted and fixed to form a rotatable upper hinge structure. Then, the third metal arm 103 and the fourth metal arm 104 are crossed so that the through holes corresponding to their hinge positions are aligned and pins are inserted and fixed. After that, the through holes at the lower ends of the first metal arm 101 and the second metal arm 102 are aligned with the through holes at the upper ends of the third metal arm 103 and the fourth metal arm 104 and pins are inserted and fixed. At this time, the four metal arms are connected to each other through pins to form a four-arm hinge frame structure that can be linked. When the hook 403 of the locking mechanism 400 is hung in the positioning ring 402, the hook 403 can restrict the third metal arm 103 and the fourth metal arm 104 from rotating around the pin, which can make the two gripping claws 301 move away from each other. At this time, the two gripping claws 301 are in an open state.

[0048] The working principle of this embodiment is as follows:

[0049] When no lifting operation is being performed, the lifting device is in its initial open state. At this time, the hook 403 of the locking mechanism 400 is attached to the positioning ring 402, forming a rigid constraint on the third metal arm 103 and the fourth metal arm 104, restricting their rotation around the cross hinge point. Due to this constraint, the upper ends of the third metal arm 103 and the fourth metal arm 104 maintain a fixed distance, while the two gripping claws 301 at the lower ends are in an open state away from each other, preparing for the subsequent removal of the wheel. At the same time, the first metal arm 101 and the second metal arm 102 form a stable lifting support structure through the upper hinge point. The lifting hole 201 of the first lifting connector 200 can be directly connected to the hook of the lifting equipment, ensuring that the entire lifting device is in a ready state. When it is necessary to lift the wheel, the position of the lifting device is first adjusted by the lifting equipment so that the two gripping claws are in an open state. The clamping claws 301 are aligned with the two wheel hubs on both sides of the wheel. Then, the locking mechanism 400 is released, and the operator removes the hook 403 from the positioning ring 402. At this time, the cross hinge point of the third metal arm 103 and the fourth metal arm 104 is released from rigid restriction and restores the freedom of rotation around the pin. After the constraint is released, the lifting action of the lifting equipment is started. The entire lifting device is subjected to an upward pulling force. Under the action of the pulling force, the first metal arm 101 and the second metal arm 102 tend to retract inward around the upper hinge point, and transmit the force to the upper end of the third metal arm 103 and the fourth metal arm 104 through the lower hinge point. Since the third metal arm 103 and the fourth metal arm 104 adopt a cross hinge structure, the inward force at the upper end will be converted into the opposite movement at the lower end, driving the two clamping claws 301 to retract inward synchronously, so as to achieve a firm grip on the wheel.

[0050] Example 2

[0051] Compared with Embodiment 1, another embodiment of the present invention is as follows:

[0052] Please refer to this carefully. Figure 2The second lifting connector 700 has a through hole on its surface for the pin shaft to pass through. The clamping mechanism 300 is replaced by an adjustable extended clamping assembly 500. The adjustable extended clamping assembly 500 includes a first extended arm 501 and a second extended arm 502, and adjustable grippers 503 respectively mounted on the first extended arm 501 and the second extended arm 502 by an assembly assembly. One end of the first metal arm 101 and the first extended arm 501, as well as the hinge position, have through holes for the pin shaft to pass through. The assembly includes an assembly frame 504 with multiple adjustment holes 505 respectively opened on the surfaces of the first extended arm 501 and the second extended arm 502. Two through holes are symmetrically opened on the surface of the assembly frame 504. Bolts 506 are provided on the inner walls of the through holes. Nuts are threaded onto the surface of the bolts 506. Adjustable grippers 503 are fixedly installed on the lower surface of the assembly frame 504. The inner surfaces of the grippers 301 and the adjustable grippers 503 are provided with anti-slip textures, which are cross-shaped raised stripes.

[0053] Specifically, the first metal arm 101 and the second metal arm 102 are placed into the second lifting connector 700, their upper through holes are aligned, and pins are inserted and fixed, completing the integrated assembly of the second lifting connector 700, the first metal arm 101, and the second metal arm 102, forming a rotatable upper hinge structure. Next, the first extended arm 501 and the second extended arm 502 are crossed, their hinge positions aligned, and pins are inserted and fixed, forming a hinge structure for the first extended arm 501 and the second extended arm 502. Then, the lower through holes of the first metal arm 101 and the second metal arm 102 are aligned with the upper through holes of the first extended arm 501 and the second extended arm 502, and pins are inserted and fixed sequentially. At this point, the first metal arm 101, the second metal arm 102, the first extended arm 501, and the second extended arm 502 are interconnected by pins, forming a four-arm hinged frame structure that can move together. The assembly frame 504 is aligned with the adjustment holes 505 on the surfaces of the first extended arm 501 and the second extended arm 502. The two assembly frames 504 are fixed to the first extended arm 501 and the second extended arm 502 respectively by bolts 506 and nuts, thereby completing the installation of the adjustable gripper 503. When it is necessary to lift the wheel, the first extended arm 501 and the second extended arm 502 are rotated around the pin by external force through the four-arm hinge structure, which in turn drives the lower adjustable gripper 503 to retract inward. The wheel is clamped by the friction between the adjustable gripper 503 and the wheel, thus completing the gripping of the wheel. The position of the assembly frame 504 on the first extended arm 501 and the second extended arm 502 can be adjusted by bolts 506 and nuts according to the size of different wheel specifications, thereby changing the opening and closing width of the adjustable gripper 503 to adapt to wheels of different diameters and improve the versatility of the lifting device.

[0054] The working principle of this embodiment is as follows:

[0055] The wheel-specific clamp-type lifting device of this embodiment is structurally optimized based on Embodiment 1. In the initial standby state, the lifting device is connected to the hook of the lifting equipment through the second lifting connector 700. This connector integrates and fixes the upper hinge points of the first metal arm 101 and the second metal arm 102, forming a stable lifting force-bearing body. For wheels of different diameters, the lifting device can achieve precise adaptation through the adjustment function of the adjustable extended clamping assembly 500. According to the wheel hub diameter, the operator loosens the bolts 506 and nuts on the assembly frame 504, and moves the assembly frame 504 along the multiple sets of adjustment holes 505 on the surface of the first extended arm 501 and the second extended arm 502, driving the adjustable jaws 503 to move synchronously until the initial distance between the two adjustable jaws 503 matches the wheel diameter. After adjustment, Tighten bolt 506 again. Utilize the axial preload of bolt 506 and nut to rigidly fix assembly frame 504 to the first extended arm 501 and the second extended arm 502, ensuring that the position of adjustable gripper 503 does not shift during operation. When the lifting equipment is lifted, the lifting force is transmitted to the upper ends of the first extended arm 501 and the second extended arm 502 through the second lifting connector 700, driving them to retract inward around the hinge point. According to the principle of four-arm hinge, the inward displacement of the lower ends of the first metal arm 101 and the second metal arm 102 is transmitted to the upper ends of the first extended arm 501 and the second extended arm 502 through the pin, causing the cross-hinged first extended arm 501 and the second extended arm 502 to rotate in opposite directions, driving the adjustable gripper 503 at the lower end to retract inward synchronously, thus achieving a firm grip on the wheels.

[0056] Example 3

[0057] Compared with Embodiment 2, another embodiment of the present invention is as follows:

[0058] Please refer to this carefully. Figures 3-8 The locking mechanism 400 is replaced by an automatic locking assembly 600. The automatic locking assembly 600 includes a drive rod 601, a locking disc 602, a return spring 603, a limit pin 604, and a limit assembly disposed on the back of the second extended arm 502. A first pawl 614 is fixedly installed at the lower end of the drive rod 601. A first paddle 605 and a second paddle 606 are fixedly installed on the surface of the locking disc 602 in a circumferential manner. A second pawl 607 is fixedly installed at the end of the first paddle 605. Multiple first paddles 605 and second paddles 606 are spaced apart. A through hole for the pin shaft to pass through is opened at one end of the drive rod 601.

[0059] Specifically, the first metal arm 101 and the second metal arm 102 are placed inside the second lifting connector 700. Then, the drive rod 601 is placed on the front of the second lifting connector 700, so that the through hole on the drive rod 601 is aligned with the through hole on the second lifting connector 700. After that, the through holes at the upper ends of the first metal arm 101 and the second metal arm 102 are aligned, the pin is inserted and fixed, and the integrated assembly of the drive rod 601, the second lifting connector 700, the first metal arm 101 and the second metal arm 102 is completed. At this time, the drive rod 601 can rotate smoothly around the pin.

[0060] Please refer to this carefully. Figure 3 and Figure 6 The limiting pin 604 is installed on the front of the first extended arm 501, and hooks are provided at both ends of the return spring 603. Hanging rings for attaching the hooks are fixedly installed on one side of both the second metal arm 102 and the second extended arm 502.

[0061] Specifically, the hooks on the return spring 603 are respectively hung on the hanging rings on the second metal arm 102 and the second extended arm 502. The elasticity of the return spring 603 can drive the drive rod 601 to always contact the limit pin 604, and the limit pin 604 can limit the excessive rotation of the drive rod 601.

[0062] Please refer to this carefully. Figure 4 and Figure 5 The limiting component includes a mounting cylinder 608, a ratchet 609 disposed inside the mounting cylinder 608, a protrusion 610 disposed on the surface of the mounting cylinder 608, a pawl 611 slidably engaged with the inner wall of the protrusion 610, and a compression spring 612 disposed inside the protrusion 610. A cover plate 613 is detachably mounted on the back of the mounting cylinder 608 by screws. A shaft portion of a pin is fixedly mounted on the front of the ratchet 609, and a cotter pin portion of a pin is fixedly mounted on the back of the locking disc 602. Mounting holes are provided on the back of both the mounting cylinder 608 and the second extension arm 502. The two ends of the compression spring 612 abut against the inner wall of the protrusion 610 and one side of the pawl 611, respectively. The pawl 611 is adapted to the tooth groove of the ratchet 609.

[0063] Specifically, the first extended arm 501 and the second extended arm 502 are crossed and aligned with the through holes at their hinge positions. Then, the shaft part of the pin on the ratchet 609 is inserted into the through hole, and the cotter pin part of the pin on the locking disc 602 is inserted into the through hole. The shaft part and the cotter pin part of the pin are then fixed, thereby assembling the first extended arm 501, the second extended arm 502, the ratchet 609, and the locking disc 602 into one unit. At this time, the rotation of the locking disc 602 will drive the ratchet 609 to rotate. Using the mounting holes and fasteners (such as screws), the mounting sleeve 608 can be fixed to the back of the second extended arm 502. At this time, the pawl 611 will be inserted into the tooth groove of the ratchet 609. The pawl 611 can restrict the ratchet 609 from rotating counterclockwise, thereby restricting the locking disc 602 from rotating counterclockwise.

[0064] The working principle of this embodiment is as follows:

[0065] This embodiment of the wheel-specific clamping lifting device adds an automatic locking component 600 to the second embodiment. In the initial state, the first jaw 614 on the drive rod 601 and the second jaw 607 on the locking disc 602 are in contact and engaged. At this time, the first metal arm 101 and the second metal arm 102 are locked, and the adjustable jaw 503 is in an open state, facilitating the placement of the wheel. When the adjustable jaw 503 is placed on the wheel, after it contacts the wheel, the lifting equipment begins to slowly descend. The movement of the first metal arm 101 drives the drive rod 601 to descend closer to the locking disc 602. At this time, the two adjustable jaws 503 further open, and simultaneously, the bottom of the first jaw 614 contacts the second lever 606, limiting the movement of the lifting device. When the locking disc 602 rotates counterclockwise, the first pawl 614 opens along the arc of the second lever 606, moving away from the limit pin 604. When the first pawl 614 descends and disengages from the second lever 606, the return spring 603 pulls the drive rod 601 back to its original position. At this time, the first pawl 614 moves below the second lever 606, and the automatic locking assembly 600 unlocks. The lifting equipment then begins to slowly lift. The lifting force is transmitted through the second lifting connector 700 to the first metal arm 101 and the second metal arm 102, causing them to tend to move inwards. This tendency is transmitted to the drive rod 601, causing it to rise away from the locking disc 602. At this time, the first pawl 614 contacts the second lever 606, causing the locking disc 602 to rotate clockwise. As lever 601 continues to rise, the first chuck 614 slides to the end of the second lever 606 and disengages from it. The return spring 603 immediately pulls the drive lever 601 back to its original position. The cross-hinged first extended arm 501 and second extended arm 502 regain their rotational freedom, and the lifting equipment continues to rise. The first metal arm 101 and second metal arm 102 retract inward around their upper hinge point. Through the linkage effect of the four-arm hinges, the adjustable chuck 503 retracts inward synchronously, achieving a firm grip. When the wheels have lifted the equipment to the target position and contacted the support surface, the lifting equipment slowly lowers. The tension on the lifting device gradually disappears, and the first metal arm 101 and second metal arm 102 open outward under their own weight, causing the drive lever 601 to descend towards locking. As the disc 602 moves, the first jaw 614 slides along the arc-shaped surface of the first lever 605 on the locking disc 602 under the tension of the return spring 603. When it reaches the end of the first lever 605, it continues to descend. At this time, the return spring 603 can drive the drive rod 601 to rotate, causing the first jaw 614 to engage with the second jaw 607 again. The automatic locking assembly 600 completes the reset and locking. With the reset of the automatic locking assembly 600, the engagement of the first jaw 614 and the second jaw 607 restricts the rotation of the first extension arm 501 and the second extension arm 502, allowing the adjustable gripper 503 to return to its initial open state. The operator can easily separate the lifting device from the wheels. After unloading, the lifting device can directly proceed to the next lifting operation.No additional manual unlocking or reset is required.

Claims

1. A clamp-type lifting device specifically for road wheels, characterized in that, include: The main frame (100) includes a first metal arm (101), a second metal arm (102), a third metal arm (103), a fourth metal arm (104), and a pin. Both ends of the first metal arm (101) and the second metal arm (102) are provided with through holes for the pin to pass through. One end of the third metal arm (103) and the fourth metal arm (104) and the hinge position are provided with through holes for the pin to pass through. The first lifting connector (200) is fixedly installed on the upper end of the first metal arm (101) and has a lifting hole (201) on its surface for the hook to be hung. The second lifting connector (700) has a through hole on its surface for the pin shaft to pass through; The clamping mechanism (300) includes clamping claws (301) that are respectively fixedly installed at the lower ends of the third metal arm (103) and the fourth metal arm (104). The locking mechanism (400) includes a lifting ring (401) fixedly mounted on a second metal arm (102), a positioning ring (402) fixedly mounted on a third metal arm (103), and a hook (403) hinged to the lifting ring (401).

2. The special clamp-type lifting device for wheels according to claim 1, characterized in that, The clamping mechanism (300) is replaced by an adjustable extended clamping assembly (500). The adjustable extended clamping assembly (500) includes a first extended arm (501) and a second extended arm (502), and adjustable grippers (503) are respectively installed on the first extended arm (501) and the second extended arm (502) by an assembly assembly. One end of the first metal arm (101) and the first extended arm (501) and the hinge position are provided with through holes for the pin shaft to pass through.

3. The special clamp-type lifting device for wheels according to claim 2, characterized in that, The assembly component includes an assembly frame (504) with multiple adjustment holes (505) respectively opened on the surfaces of the first extension arm (501) and the second extension arm (502). Two through holes are symmetrically opened on the surface of the assembly frame (504). Bolts (506) are provided on the inner wall of the through holes. Nuts are threaded on the surface of the bolts (506), and adjustable grippers (503) are fixedly installed on the lower surface of the assembly frame (504).

4. The special clamp-type lifting device for wheels according to claim 2, characterized in that, The locking mechanism (400) is replaced by an automatic locking assembly (600). The automatic locking assembly (600) includes a drive rod (601), a locking disc (602), a return spring (603), a limit pin (604), and a limit assembly disposed on the back of the second extended arm (502). A first pawl (614) is fixedly installed at the lower end of the drive rod (601). A first paddle (605) and a second paddle (606) are fixedly installed on the surface of the locking disc (602) in a circumferential manner. A second pawl (607) is fixedly installed at the end of the first paddle (605).

5. A clamp-type lifting device for wheels according to claim 4, characterized in that, Multiple first paddles (605) and second paddles (606) are spaced apart, and one end of the drive rod (601) has a through hole for the pin shaft to pass through.

6. A clamp-type lifting device for wheels according to claim 4, characterized in that, The limiting pin (604) is installed on the front of the first extended arm (501), and hooks are provided at both ends of the return spring (603). Hanging rings for hooks are fixedly installed on one side of the second metal arm (102) and the second extended arm (502).

7. A clamp-type lifting device for wheels according to claim 4, characterized in that, The limiting component includes a mounting cylinder (608), a ratchet (609) disposed inside the mounting cylinder (608), a protrusion (610) disposed on the surface of the mounting cylinder (608), a pawl (611) slidably engaged with the inner wall of the protrusion (610), and a compression spring (612) disposed inside the protrusion (610). A cover plate (613) is detachably mounted on the back of the mounting cylinder (608) by screws.

8. A clamp-type lifting device for wheels according to claim 7, characterized in that, The ratchet (609) has a pin shaft portion fixedly mounted on its front side, and the locking disc (602) has a cotter pin portion fixedly mounted on its back side.

9. A clamp-type lifting device for wheels according to claim 7, characterized in that, The mounting cylinder (608) and the second extended arm (502) are both provided with mounting holes on their back sides, and the two ends of the compression spring (612) abut against the inner wall of the protrusion (610) and one side of the pawl (611), respectively. The pawl (611) is adapted to the tooth groove of the ratchet (609).

10. A clamp-type lifting device for wheels according to claim 3, characterized in that, The inner surfaces of both the gripping claw (301) and the adjustable gripping claw (503) are provided with anti-slip textures, which are cross-shaped raised stripes.

Images