Upper frame pulley hoisting tool

Abstract

The utility model discloses an upper frame pulley hoisting tool which comprises a main bracket structure, a self-locking mechanism, a bidirectional driving mechanism and a turnover mechanism, the bidirectional driving mechanism comprises a positive and negative thread double-end thread lead screw, a nut pair and a sliding rail; the positive and negative double-end thread lead screw is arranged on the main bracket structure; the two nut pairs are arranged on the right-hand thread and the left-hand thread of the right-hand thread and left-hand thread of the right-hand thread and left-hand thread lead screw respectively. The two sliding rails are arranged on the main support structure and correspond to the right-hand thread position and the left-hand thread position of the right-hand thread and left-hand thread position of the right-hand thread and left-hand thread lead screw respectively. The two sets of turnover mechanisms are respectively connected with the corresponding nut pairs and move along the corresponding sliding rails; the self-locking mechanism is arranged at any end of the positive and negative tooth double-end thread lead screw. According to the pulley lifting tool, a pulley with a large size and a heavy weight can be easily lifted, the direction of a lifted object can be changed, the vertical direction and the horizontal direction can be switched, and the efficiency of lifting operation is improved through the pulley lifting tool.

Description

Technical Field

[0001] The utility model relates to a container crane, and more particularly to an upper pulley hoisting tool. Background Art

[0002] In the field of mechanical manufacturing and processing, pulleys are an important transmission and load-bearing component, widely used in various mechanical equipment. With the continuous development of industrial production, the demand for pulleys is increasing, and the requirements for their installation methods, production efficiency and safety are also becoming more and more stringent.

[0003] Traditional lifting pulleys utilize flat lifting straps. Operators must manually lift the pulley, thread the flat lifting strap through the pulley, and secure it before lifting. This traditional lifting process is complex and heavily reliant on overhead cranes. The pulley's heavy weight and large size also make the lifting operation inconvenient. Furthermore, if the pulley's center of gravity is not properly balanced during the lifting process, the pulley may tip over or tilt, causing damage and impacting the pulley, impacting product quality. Although flat lifting straps offer a high load capacity, their capacity is still limited. Using them beyond their rated load capacity can cause the strap to break or fail, potentially leading to safety accidents. For these reasons, pulley lifting fixtures, as crucial auxiliary equipment in the pulley assembly process, should be designed to accommodate both horizontal and vertical lifting operations, ensuring ease of operation and maintenance, and reducing operator workload. Furthermore, the safety of the lifting fixture is crucial, and a self-locking feature is essential to prevent accidents caused by fixture failure. Utility Model Content

[0004] In response to the defects existing in the prior art, the purpose of the present utility model is to provide a pulley lifting tool that can easily lift pulleys that are larger in size and heavier in weight and can change the direction of the hoisted objects so that they can be converted between vertical and horizontal directions. The pulley lifting tool improves the efficiency of the lifting operation, enables the pulley to move faster and more smoothly, and also improves safety.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A top pulley hoisting tool comprises a main support structure, a self-locking mechanism, a two-way driving mechanism and a turning mechanism;

[0007] The bidirectional drive mechanism includes a double-threaded lead screw with positive and negative threads, a nut pair and a slide rail;

[0008] The positive and negative double-threaded lead screw is arranged on the main support structure;

[0009] There are two nut pairs, which are respectively arranged on the positive thread and the negative thread of the positive and negative double-start threaded screw;

[0010] There are two slide rails, both of which are arranged on the main support structure and correspond to the positive thread and negative thread positions of the positive and negative double-start threaded screw respectively;

[0011] The flip mechanism is provided with two sets, which are respectively connected to the corresponding nut pairs and move along the corresponding slide rails;

[0012] The self-locking mechanism is arranged at either end of the positive and negative double-threaded lead screw.

[0013] Preferably, the main support structure includes a crossbeam, a main support and a handrail;

[0014] The crossbeam is horizontally arranged at the lower end of the main support;

[0015] The upper end of the main bracket is provided with a hanging hook;

[0016] There are two handrails, which are respectively arranged at the two ends of the beam.

[0017] Preferably, the forward and reverse double-threaded lead screw is fixed to the crossbeam via a plurality of support seats.

[0018] Preferably, the flipping mechanism includes a chuck, a spring pin and a clamp;

[0019] The clamp is provided on the chuck;

[0020] The tail end shaft of the chuck is connected to the nut pair through a bearing;

[0021] The spring pin is provided on the nut pair;

[0022] The chuck is provided with two notches, which are matched with the spring pins.

[0023] Preferably, the two notches are 90° apart.

[0024] Preferably, the clamps in the two sets of the flipping mechanisms are arranged opposite to each other.

[0025] Preferably, the self-locking mechanism includes a ratchet, a ratchet pawl, a rotating handwheel and a base plate;

[0026] The base plate is connected to the support seat near the end of the positive and negative double-threaded lead screw;

[0027] The ratchet pawl is arranged on the bottom plate;

[0028] The ratchet is mounted on the outer side of the end of the positive and negative double-threaded lead screw and is adapted to the ratchet pawl;

[0029] The rotating hand wheel is connected to the end of the positive and negative double-threaded lead screw.

[0030] This utility model provides a pulley hoisting fixture that can easily lift large and heavy pulleys and change the direction of the hoisted object, allowing for conversion between vertical and horizontal directions. This pulley hoisting fixture improves the efficiency of hoisting operations, enabling faster and smoother pulley movement while also improving safety. The utility model utilizes a rotating handwheel to drive a ball screw and nut pair to achieve bidirectional clamping of the fixture, while a spring pin and chuck slot enable flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the main view of the upper pulley lifting tooling of the utility model;

[0032] Figure 2 This is a top view of the upper pulley lifting tooling of the utility model;

[0033] Figure 3 This is a structural diagram of the self-locking mechanism in the upper pulley lifting tooling of the utility model;

[0034] Figure 4 This is a structural diagram of the bidirectional drive mechanism in the upper pulley hoisting tooling of the utility model;

[0035] Figure 5 It is a structural schematic diagram of the turning mechanism in the upper pulley lifting tooling of the utility model. DETAILED DESCRIPTION

[0036] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0037] Combine Figures 1 to 5 As shown, the utility model provides an upper pulley lifting tool, which includes a main support structure, a self-locking mechanism, a two-way driving mechanism and a flipping mechanism.

[0038] The main support structure serves as a support for various components of the upper pulley lifting tooling of the utility model, and includes a crossbeam 1, a main support 2 and a handrail 3.

[0039] The crossbeam 1 is horizontally connected to the lower end of the main support 2.

[0040] A plurality of hanging hooks 4 are provided at the upper end of the main bracket 2 .

[0041] Two handrails 3 are provided and are connected to both ends of the beam 1 respectively.

[0042] The bidirectional driving mechanism includes a double-threaded lead screw 5 with positive and negative threads, a nut pair 6 and a slide rail 7.

[0043] A double-threaded lead screw 5 with positive and negative teeth is provided and is connected and fixed at a lower position of the beam 1 through a plurality of support seats 8.

[0044] Two nut pairs 6 are provided, which are respectively mounted on the positive thread and the negative thread of the positive and negative double-start threaded screw 5.

[0045] Two slide rails 7 are provided, both connected and fixed at the upper position of the crossbeam 1 , and respectively correspond to the positive thread and negative thread positions of the positive and negative double-start threaded screw 5 .

[0046] Two sets of flipping mechanisms are provided, each including a chuck 9 , a spring pin 10 and a clamp 11 .

[0047] The clamps 11 are connected to the chuck 9 , and the two clamps 11 are arranged opposite to each other.

[0048] The tail end shaft of the chuck 9 is connected to the nut pair 6 through a bearing, so that the chuck 9 can rotate around the bearing on the nut pair 6.

[0049] A spring pin 10 is mounted in the nut pair 9, with notches 12 spaced 90° apart on the chuck 9. During horizontal lifting, the spring pin 10 pops out and fits into one notch 12 on the chuck 9, preventing the clamp 11 from tipping over during the lift. To flip the pulley, the spring pin 10 is pulled back, pushing it to flip. When the flip angle reaches 90°, the spring pin 10 aligns with the other notch 12 on the chuck 9 and snaps into place, completing the flip function.

[0050] The self-locking mechanism includes a ratchet 13 , a ratchet pawl 14 , a rotating handwheel 15 and a base plate 16 .

[0051] The base plate 16 is connected and fixed to the support seat 8 near the end of the positive and negative double-threaded lead screw 5.

[0052] The ratchet pawl 14 is mounted on the base plate 16 via a pin.

[0053] The ratchet 13 is sleeved on the outer side of the end of the positive and negative double-threaded lead screw 5 , can rotate synchronously with the positive and negative double-threaded lead screw 5 , and is adapted to the ratchet pawl 14 .

[0054] The rotating hand wheel 15 is connected to the end of the positive and negative double-threaded lead screw 5.

[0055] By rotating the handwheel 15, the double-threaded screw 5 with forward and reverse teeth is driven to rotate, and the two nut pairs 9 move relatively along the double-threaded screw 5 with forward and reverse teeth. The chuck 9 moves along the slide rail 7, so that the two clamps 11 are relatively close to each other and clamped on the inner diameter of the roller. The ratchet pawl 14 is clamped on the teeth of the ratchet 13 counterclockwise, so that after the handwheel 15 is loosened and rotated, the clamp 11 can still be clamped on the inner diameter of the roller to ensure that the clamp nut pair 9 does not roll back.

[0056] After the lifting is completed, the rotating hand wheel 15 is rotated in the opposite direction, and the ratchet pawl 14 is disengaged from the ratchet 13, so that the spring pin 10 and the clamp 11 can be reset.

[0057] The operation process of the utility model upper pulley lifting tool is as follows:

[0058] Control the crane to install the mounting chain on the lifting hook 4 located on the main bracket 2. By turning the rotating handwheel 15 to output power, cooperate with the two-way drive mechanism 3 to adjust the clamp 11 to the appropriate pulley size. After the ratchet pawl 14 in the self-locking mechanism is stuck on the outer cylindrical gear teeth of the ratchet 13 so that the rotating handwheel 15 cannot be rotated counterclockwise, the crane can be operated to lift the pulley. After lifting the pulley, pull out the spring pins 10 of the nut pairs 9 on both sides, push the pulley to rotate it 90°, and the spring pins 10 pop out and get stuck in the notch 12 of the chuck 9 to achieve a 90° flip, allowing conversion between vertical and horizontal directions. After safely lifting the pulley, turn the rotating handwheel 15 clockwise to release the ratchet pawl 14, pull out the spring pins 10 of the nut pairs 9 on both sides again, and rotate the clamp 11 to a horizontal position to prepare for the next lifting.

[0059] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A lifting tool for upper pulley, characterized by: It includes a main support structure, a self-locking mechanism, a two-way driving mechanism and a flipping mechanism; The bidirectional drive mechanism includes a double-threaded lead screw with positive and negative threads, a nut pair and a slide rail; The positive and negative double-threaded lead screw is arranged on the main support structure; There are two nut pairs, which are respectively arranged on the positive thread and the negative thread of the positive and negative double-start threaded screw; There are two slide rails, both of which are arranged on the main support structure and correspond to the positive thread and negative thread positions of the positive and negative double-start threaded screw respectively; The flip mechanism is provided with two sets, which are respectively connected to the corresponding nut pairs and move along the corresponding slide rails; The self-locking mechanism is arranged at either end of the positive and negative double-threaded lead screw.

2. The upper pulley hoisting tool according to claim 1, characterized in that: The main support structure includes a crossbeam, a main support and a handrail; The crossbeam is horizontally arranged at the lower end of the main support; The upper end of the main bracket is provided with a hanging hook; There are two handrails, which are respectively arranged at the two ends of the beam.

3. The upper pulley hoisting tool according to claim 2, characterized in that: The positive and negative double-threaded lead screw is fixed on the crossbeam through a plurality of support seats.

4. The upper pulley hoisting tool according to claim 1, characterized in that: The flipping mechanism includes a chuck, a spring pin and a clamp; The clamp is provided on the chuck; The tail end shaft of the chuck is connected to the nut pair through a bearing; The spring pin is provided on the nut pair; The chuck is provided with two notches, which are matched with the spring pins.

5. The upper pulley hoisting tool according to claim 4, characterized in that: The two notches are 90° apart.

6. The upper pulley hoisting tool according to claim 4, characterized in that: The clamps in the two sets of the turning mechanisms are arranged opposite to each other.

7. The upper pulley hoisting tool according to claim 3, characterized in that: The self-locking mechanism includes a ratchet, a ratchet pawl, a rotating handwheel and a base plate; The base plate is connected to the support seat near the end of the positive and negative double-threaded lead screw; The ratchet pawl is arranged on the bottom plate; The ratchet is mounted on the outer side of the end of the positive and negative double-threaded lead screw and is adapted to the ratchet pawl; The rotating hand wheel is connected to the end of the positive and negative double-threaded lead screw.

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