Lifting clamp for large annular forgings

Abstract

The utility model relates to the technical field of hoisting clamps, and discloses a large annular forge piece hoisting clamp which comprises a main arm, a sliding sleeve, hollow arms and a limiting mechanism, the sliding sleeve is arranged outside the main arm in a sliding mode, the hollow arms are evenly distributed outside the sliding sleeve, the limiting mechanism comprises clamping jaws, the clamping jaws are connected with the hollow arms through bearings with seats, and the clamping jaws are connected with the hollow arms through the bearings with the seats. The top of the clamping jaw is connected with a pull rope through a pin shaft, the other end of the pull rope is connected with a single-lug base through a pin shaft, and the single-lug base is connected with the main arm. According to the hoisting clamp for the large annular forgings, the stability and safety of the limiting mechanism in the using process are improved, meanwhile, self-locking and secondary fixing can be conducted on the interior of the large annular forgings, the stability of the device in the using process is improved, and the situation that cracks are generated in the limiting mechanism to cause breakage when the limiting mechanism is used for a long time is avoided; and the large annular forgings fall off during hoisting, so that the construction environment and workers are injured.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting clamps, in particular to a lifting clamp for a large annular forging. Background Art

[0002] Forging is a metal processing process that presses metal blanks into workpieces of desired shapes by plastically deforming the metal at high temperatures. Forgings have excellent mechanical properties and surface quality and are widely used in aerospace, automobile, machinery manufacturing and other fields.

[0003] Large annular forgings need to be fixed and moved using lifting clamps during transportation. The lifting clamps in the prior art are clamped on the outside of the large annular forgings and then driven by a crane. However, the clamps may be at risk of breaking after long-term use. If the large annular forgings fall during driving, it will cause damage to the construction environment and construction workers. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a large annular forging lifting clamp to solve the technical problem that the above-mentioned claws may break after long-term use, and if the large annular forging falls during driving, it will cause injuries to the construction environment and construction personnel.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large annular forging lifting clamp, comprising: a main arm, a sliding sleeve, a hollow arm and a limiting mechanism, the sliding sleeve is slidably arranged on the outside of the main arm, the hollow arm is evenly arranged on the outside of the sliding sleeve, and a limiting mechanism is connected between the hollow arm and the main arm, the limiting mechanism includes a claw, the claw is connected to the hollow arm through a seat bearing, the top of the claw is connected to a pull rope through a pin shaft, and the other end of the pull rope is connected to a single ear seat through a pin shaft, and the single ear seat is connected to the main arm.

[0006] The interior of the hollow arm is connected with a reinforcement mechanism, which includes a block connected to the main arm, the exterior of the block is connected with a connecting rod via a hinge, and the other end of the connecting rod is connected with a T-shaped arm via a hinge, the exterior of the T-shaped arm is connected with a cross arm, and the other end of the cross arm is connected with a clamping block.

[0007] Preferably, a lifting ring is installed on the top of the main arm, and a lifting hole is opened inside the lifting ring, so that the lifting ring facilitates the crane to drive the main arm to rise.

[0008] Preferably, a spring is installed on the top of the block, and the spring is connected to the sliding sleeve, and the spring can drive the main arm to return to the limiting mechanism when not in use.

[0009] Preferably, both ends of the hollow arm are provided with a slide groove, and a slider is slidably connected inside the slide groove, and the slider is connected to the T-shaped arm. The slide groove cooperates with the slider to guide the T-shaped arm to perform linear motion.

[0010] Preferably, sliding grooves are provided at both ends of the hollow arm, and a sliding block is slidably connected inside the sliding groove, and the sliding block is connected to the clamping block. The sliding groove cooperates with the sliding block to guide the clamping block to perform linear motion.

[0011] Preferably, a groove is provided on the outside of the clamping claw, and the groove is adapted to the T-shaped arm, and the T-shaped arm can be inserted into the groove to limit the position of the clamping claw.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The large annular forging lifting clamp can automatically limit the position of the claws through the added reinforcement mechanism when the large annular forging is being lifted, so as to avoid the claws shaking and causing the large annular forging to fall when the large annular forging is limited by the claws, thereby increasing the stability and safety of the limiting mechanism when in use, and at the same time, the interior of the large annular forging can be self-locked and fixed twice, thereby increasing the stability of the device when in use, and avoiding the limiting mechanism from cracking and breaking when in long-term use, which can cause the large annular forging to fall during lifting and cause damage to the construction environment and workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front schematic diagram of the utility model;

[0015] Figure 2 This is a front view schematic diagram of the limit mechanism of the utility model;

[0016] Figure 3 It is a partial cross-sectional view of the hollow arm of the utility model;

[0017] Figure 4 It is an exploded schematic diagram of the limiting mechanism of the utility model.

[0018] In the figure: 1, main arm; 11, lifting ring; 2, sliding sleeve; 3, hollow arm; 31, sliding groove; 32, sliding block; 33, sliding groove; 34, sliding block; 4, limiting mechanism; 41, claw; 42, pull rope; 43, single ear seat; 44, groove; 5, reinforcement mechanism; 51, block; 52, connecting rod; 53, T-shaped arm; 54, cross arm; 55, block; 56, spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The utility model provides a technical solution, please refer to Figure 1 and Figure 2 A large annular forging lifting fixture includes: a main arm 1, a sliding sleeve 2, a hollow arm 3 and a limiting mechanism 4. The sliding sleeve 2 can slide on the outside of the main arm 1, and the hollow arm 3 can rotate the limiting mechanism 4 and the reinforcement mechanism 5. The top of the main arm 1 is equipped with a lifting ring 11, and a lifting hole is opened inside the lifting ring 11. The lifting ring 11 facilitates the crane to drive the main arm 1 to rise.

[0021] The sleeve 2 is slidably arranged on the outside of the main arm 1, and the hollow arms 3 are evenly arranged on the outside of the sleeve 2. A limiting mechanism 4 is connected between the hollow arm 3 and the main arm 1. The limiting mechanism 4 includes a claw 41. The claw 41 can buckle and fix the inner ring of the large annular forging by rotating. The claw 41 is connected to the hollow arm 3 through a seat bearing. The top of the claw 41 is connected to a pull rope 42 through a pin shaft. The pull rope 42 can pull the single ear seat 43 to rotate, and the other end of the pull rope 42 is connected to the single ear seat 43 through a pin shaft. The single ear seat 43 follows the main arm 1 to rise and drives the claw 41.

[0022] The single ear seat 43 is connected to the main arm 1, and a groove 44 is provided on the outside of the claw 41, and the groove 44 is adapted to the T-shaped arm 53. The groove 44 can be inserted by the T-shaped arm 53 to limit the position of the claw 41. The pull rope 42 has a slight elasticity to avoid the claw 41 from conflicting with the T-shaped arm 53. In this case, the claw 41 rotates first, and after the claw 41 completes its rotation, the T-shaped arm 53 is inserted inside to limit it to prevent it from returning to its original position.

[0023] See also Figure 3 and Figure 4 The interior of the hollow arm 3 is connected with a reinforcement mechanism 5, and the reinforcement mechanism 5 includes a block 51, and the block 51 can transmit power to the connecting rod 52. The block 51 is connected to the main arm 1, and the outside of the block 51 is connected with a connecting rod 52 through a hinge, and the connecting rod 52 can transmit power to the T-shaped arm 53, and the other end of the connecting rod 52 is connected with the T-shaped arm 53 through a hinge, and the T-shaped arm 53 can limit the movement of the claw 41, and the outside of the T-shaped arm 53 is connected with a cross arm 54, and the cross arm 54 can transmit power to the clamping block 55, and the other end of the cross arm 54 is connected with the clamping block 55, and the clamping block 55 can be inserted into the inner ring of the large annular forging to fix it.

[0024] A spring 56 is assembled on the top of the block 51, and the spring 56 is connected to the sliding sleeve 2. The spring 56 can drive the main arm 1 to return the limiting mechanism 4 when not in use. Slide grooves 31 are provided at both ends of the interior of the hollow arm 3, and a slider 32 is slidably connected inside the slide groove 31. The slider 32 is connected to the T-shaped arm 53. The slide groove 31 cooperates with the slider 32 to guide the T-shaped arm 53 to move linearly. Sliding grooves 33 are provided at both ends of the interior of the hollow arm 3, and a sliding block 34 is slidably connected inside the sliding groove 33. The sliding block 34 is connected to the card block 55. The sliding groove 33 cooperates with the sliding block 34 to guide the card block 55 to move linearly.

[0025] In this scheme, the sleeve 2 and the sleeve 2 are first inserted into the hole in the middle of the large annular forging, and the external crane is connected to the lifting ring 11, and the lifting ring 11 and the main arm 1 are driven by the crane to rise, and then the pull rope 42 is pulled to drive the claw 41 to rotate, and the large annular forging is locked by the main arm 1, the hollow arm 3 and the claw 41, and then the large annular forging is driven to be lifted;

[0026] When the main arm 1 moves, it drives the block 51 to follow the movement, and then drives the connecting rod 52 to drive, drives the T-shaped arm 53 to slide, and then inserts into the groove 44 inside the claw 41 to limit the position of the claw 41. At the same time, the T-shaped arm 53 drives the clamping block 55 to move and insert into the large annular forging to perform secondary fixation on the large annular forging;

[0027] When large annular forgings are being hoisted, the position of the claw 41 is automatically limited by the added reinforcement mechanism 5 to prevent the claw 41 from shaking and causing the large annular forging to fall when the large annular forging is limited by the claw 41, thereby increasing the stability and safety of the limiting mechanism 4 during use, and at the same time, the interior of the large annular forging can be self-locked and fixed for a second time, thereby increasing the stability of the device during use, and preventing the limiting mechanism 4 from cracking and breaking when used for a long time, which may cause the large annular forging to fall during hoisting and cause damage to the construction environment and workers.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although the 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large annular forging lifting fixture, comprising: A main arm (1), a sliding sleeve (2), a hollow arm (3) and a limiting mechanism (4), wherein the sliding sleeve (2) is slidably arranged outside the main arm (1), the hollow arms (3) are evenly arranged outside the sliding sleeve (2), and the limiting mechanism (4) is connected between the hollow arm (3) and the main arm (1), characterized in that: the limiting mechanism (4) comprises a claw (41), the claw (41) is connected to the hollow arm (3) via a seat bearing, the top of the claw (41) is connected to a pull rope (42) via a pin shaft, and the other end of the pull rope (42) is connected to a single ear seat (43) via a pin shaft, and the single ear seat (43) is connected to the main arm (1); The hollow arm (3) is internally connected to a reinforcement mechanism (5), the reinforcement mechanism (5) comprising a block (51), the block (51) being connected to the main arm (1), the block (51) being externally connected to a connecting rod (52) via a hinge, and the other end of the connecting rod (52) being connected to a T-shaped arm (53) via a hinge, the T-shaped arm (53) being externally connected to a cross arm (54), and the other end of the cross arm (54) being connected to a clamping block (55).

2. A large annular forging lifting fixture according to claim 1, characterized in that: The top of the main arm (1) is equipped with a lifting ring (11), and a lifting hole is provided inside the lifting ring (11).

3. The large annular forging lifting fixture according to claim 1 is characterized in that: A spring (56) is mounted on the top of the block (51), and the spring (56) is connected to the sliding sleeve (2).

4. The large annular forging lifting fixture according to claim 1 is characterized in that: Both ends of the hollow arm (3) are provided with a slide groove (31), and a slider (32) is slidably connected inside the slide groove (31), and the slider (32) is connected to the T-shaped arm (53).

5. The large annular forging lifting fixture according to claim 1 is characterized in that: Both ends of the hollow arm (3) are provided with sliding grooves (33), and a sliding block (34) is slidably connected inside the sliding groove (33), and the sliding block (34) is connected to the clamping block (55).

6. The large annular forging lifting fixture according to claim 1, characterized in that: A groove (44) is provided on the outside of the claw (41), and the groove (44) is adapted to fit the T-shaped arm (53).

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