Hoisting tool

Abstract

The utility model belongs to the technical field of assembly tools, and relates to a hoisting tool which comprises a shell, a pull claw assembly, a connecting shaft, a bearing and a hoisting ring, the pull claw assembly comprises a plurality of pull claws which are arranged in a circular array, a spring is connected between every two adjacent pull claws, the shell is arranged on the outer side of the pull claw assembly in a sleeved mode, and the connecting shaft is connected with the bearing. The pull claw assembly comprises a pull claw and a connecting shaft, a guide inclined plane matched with the shell is arranged on the peripheral surface of the pull claw, the shell can move in the axial direction to push the pull claw assembly to be closed, one end of the connecting shaft is connected with the pull claw assembly, a bearing is installed at the other end of the connecting shaft, and the hoisting ring is connected with the bearing. According to the hoisting tool, the motor rotor can be rapidly and firmly fixed, rapid hoisting of the motor rotor can be achieved through hoisting equipment, industrial injury risks are reduced, the labor intensity of operators is relieved, and working efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to a hoisting fixture and belongs to the field of assembly fixture technology. Background Technology

[0002] In the motor manufacturing industry, the installation of the motor rotor is a fundamental and crucial step. Traditionally, this step is accomplished in two main ways: either by direct manual handling or by using specialized lifting equipment equipped with cylinder clamping mechanisms. Both methods face certain challenges in practice.

[0003] While manual handling offers greater flexibility, it significantly increases the physical strain on operators, particularly with heavy motor rotors. This not only places a physical burden on workers but also increases the risk of workplace injuries due to improper handling. Furthermore, manual handling makes it difficult to ensure precision during installation, potentially affecting the overall performance of the motor.

[0004] To reduce labor intensity and improve installation accuracy, the industry has developed lifting devices with cylinder clamping mechanisms. These devices use the clamping force generated by the cylinders to fix the rotor, achieving mechanized handling. However, these devices are usually quite complex in structure, containing pneumatic or electric components. This not only increases the cost and maintenance difficulty of the equipment, but also, in actual operation, the complex structure may lead to inconvenience and affect work efficiency. Furthermore, failures of the pneumatic or electric components may cause unnecessary interruptions to the production process. Utility Model Content

[0005] The purpose of this utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0006] The technical solution provided by this utility model is as follows: A lifting fixture includes a housing, a claw assembly, a connecting shaft, a bearing, and a lifting ring. The claw assembly includes multiple claws arranged in a circular array. A spring connects two adjacent claws. The housing is sleeved on the outside of the claw assembly. The outer circumferential surface of the claw is provided with a guide slope for cooperating with the housing. The housing can move axially to push the claw assembly to close. One end of the connecting shaft is connected to the claw assembly, and the other end of the connecting shaft is equipped with a bearing. The lifting ring is connected to the bearing.

[0007] Compared with the prior art, the technical solution provided by this utility model has the following advantages: When using the lifting fixture of this utility model, it is first connected to the lifting equipment (such as a crane or hoisting machinery) through the lifting ring. Then, the operator moves the housing upward in the axial direction, and the claws will open under the action of the spring. When the claw assembly is fully open, it can be engaged in the relief groove of the motor rotor. Next, the operator moves the housing downward in the axial direction, and the claws will close tightly under the guidance of the guide slope, thus firmly gripping the motor rotor. After completing the above steps, the operator only needs to lift the lifting ring with the lifting equipment to quickly lift the motor rotor. Moreover, the lifting ring and the connecting shaft are connected by bearings, which allows for adjustment of angle and direction during the lifting process, facilitating operation.

[0008] Compared with traditional methods, the hoisting fixture of this invention can not only quickly and firmly fix the motor rotor, but also achieve rapid hoisting through hoisting equipment, reducing the risk of work-related injuries, alleviating the labor intensity of operators, and significantly improving work efficiency.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the side wall of the pull claw is provided with mounting holes for installing springs, and the two ends of the springs are respectively fixed in the mounting holes on the adjacent two side pull claws.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the mounting holes for installing springs are opened on the side wall of the claw, making the installation and positioning of springs more precise and stable. The springs allow the claws to remain open when no external force is applied, making it easy to engage or release the object being lifted. When it is necessary to close the claws for lifting, simply moving the housing downwards along the axial direction will allow the claws to close tightly under the guidance of the guide ramp, firmly gripping the object being lifted.

[0012] Furthermore, the connecting shaft includes a positioning frustum, a positioning cylinder, and a connecting tube. The two ends of the positioning cylinder are respectively connected to the positioning frustum and the connecting tube. The diameter of the positioning frustum is larger than the diameter of the positioning cylinder. The end of the pull claw is provided with a hook that cooperates with the positioning frustum, and the hook is hooked onto the positioning frustum.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the design of the positioning frustum and positioning cylinder enables the hook of the pull claw to be firmly hooked on the positioning frustum, which not only enhances the connection strength between the pull claw and the connecting shaft, but also makes the pull claw stable under force and not easy to fall off.

[0014] Furthermore, it also includes a cap, which is disposed at the upper end of the connecting cylinder.

[0015] The beneficial effect of adopting the above-mentioned further solution is that by setting a cap at the upper end of the connecting cylinder, dust and debris can be prevented from entering the interior of the connecting cylinder and affecting the normal operation of the bearing.

[0016] Furthermore, a bushing is provided at the bottom of the connecting cylinder, and the bearing is installed between the bushing and the cap.

[0017] Furthermore, the bearing is a double-direction thrust ball bearing, which is installed inside the connecting cylinder. The double-direction thrust ball bearing includes an upper race, a shaft race, a lower race, a first ball cage, and a second ball cage. The upper end face of the upper race is in contact with the cap, and the lower end face of the lower race is in contact with the connecting cylinder.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the double-direction thrust ball bearing can withstand large axial and radial loads during the hoisting process, ensuring the stability and safety of the hoisting fixture.

[0019] Furthermore, it also includes a lifting eye connector, through which the lifting ring is connected to the bearing.

[0020] Furthermore, a sleeve is provided in the inner hole of the bearing, and the upper end of the sleeve is connected to the lifting ring connector.

[0021] Furthermore, it also includes a plug pin, the housing has a pin hole, one end of the plug pin is inserted into the pin hole, and the plug pin passes through the housing and abuts against the outer side wall of the connecting cylinder, which can fix the housing and the connecting cylinder.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the plug-in pin enables the lifting fixture to remain stable when not in operation, preventing accidental detachment or damage.

[0023] Furthermore, the claw assembly includes four claws. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a front view of the hoisting fixture of this utility model;

[0026] Figure 2 This is a cross-sectional view of convex 1 along the AA direction of this utility model;

[0027] Figure 3 This is a schematic diagram of the gripper assembly of this utility model when it is closed under the action of the housing;

[0028] Figure 4 This is a schematic diagram of the gripper assembly of this utility model when it opens under the action of a spring;

[0029] Figure 5 This is a schematic diagram of the connection between the gripper assembly and the spring in this utility model.

[0030] In the diagram: 1. Lifting ring; 2. Lifting ring connector; 3. Cap; 4. Bearing; 5. Bushing; 6. Housing; 7. Pull claw; 71. Guide slope; 8. Connecting shaft; 9. Insert pin; 10. Mounting hole; 12. Spring; 13. Sleeve shaft. Detailed Implementation

[0031] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).

[0032] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.

[0033] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0034] like Figure 1 - Figure 5 As shown, the technical solution provided by this utility model is as follows: A lifting fixture includes a housing 6, a claw assembly, a connecting shaft 8, a bearing 4, and a lifting ring 1. The claw assembly includes a plurality of claws 7 arranged in a circular array. A spring 12 is connected between two adjacent claws 7. The housing 6 is sleeved on the outside of the claw assembly. The outer circumferential surface of the claw 7 is provided with a guide slope 71 for cooperating with the housing 6. The housing 6 can move axially to push the claw assembly to close. One end of the connecting shaft 8 is connected to the claw assembly, and the other end of the connecting shaft 8 is equipped with a bearing 4. The lifting ring 1 is connected to the bearing 4.

[0035] In this embodiment, the pull claw assembly includes four pull claws 7 arranged in a circular array. Of course, the pull claw assembly may include more or fewer pull claws 7, as long as the connection strength requirements are met, it should be within the protection scope of this utility model.

[0036] More specifically, the side wall of the claw 7 is provided with mounting holes 10, and the two ends of the spring 12 are respectively fixed in the mounting holes 10 on the adjacent claws 7. The spring 12 enables the claw 7 to remain open when no external force is applied, making it easy to engage or release the object being lifted. When it is necessary to close the claw 7 for lifting, simply move the housing 6 downward along the axial direction, and the claw 7 will be tightly closed under the guidance of the guide slope 71, firmly gripping the object being lifted.

[0037] The connecting shaft 8 includes a positioning frustum, a positioning cylinder, and a connecting tube. The two ends of the positioning cylinder are connected to the positioning frustum and the connecting tube, respectively. The diameter of the positioning frustum is larger than the diameter of the positioning cylinder. The end of the pull claw 7 is provided with a hook that mates with the positioning frustum, and the hook hooks onto the upper surface of the positioning frustum. The design of the positioning frustum and positioning cylinder allows the hook of the pull claw 7 to be firmly hooked onto the positioning frustum, which not only enhances the connection strength between the pull claw 7 and the connecting shaft 8 but also ensures that the pull claw 7 remains stable under force and is not easily dislodged.

[0038] The hoisting fixture also includes a cap 3, which is disposed at the upper end of the connecting cylinder. The cap 3 prevents dust and debris from entering the connecting cylinder and affecting the normal operation of the bearing 4.

[0039] In this embodiment, the bearing 4 is a double-direction thrust ball bearing 4. A bushing 5 is provided at the bottom of the connecting cylinder. The double-direction thrust ball bearing 4 is installed between the bushing 5 and the cap 3. The double-direction thrust ball bearing 4 includes an upper race, a shaft race, a lower race, a first ball cage, and a second ball cage. The upper end face of the upper race is mounted against the cap 3, and the lower end face of the lower race is against the bushing 5. A sleeve shaft 13 is provided in the inner hole of the bearing 4, and the upper end of the sleeve shaft 13 is connected to the lifting ring connector 2. The double-direction thrust ball bearing 4 can withstand large axial and radial loads during hoisting, ensuring the stability and safety of the hoisting fixture.

[0040] The lifting fixture also includes a lifting ring connector 2, and the lifting ring 1 is connected to the bearing 4 through the lifting ring connector 2.

[0041] The lifting fixture also includes a pull-out pin 9. The housing 6 has a pin hole, and one end of the pull-out pin 9 is inserted into the pin hole. After passing through the housing 6, the pull-out pin 9 abuts against the outer wall of the connecting cylinder, thus fixing the housing 6 to the connecting cylinder. The pull-out pin 9 ensures the lifting fixture remains stable when not in operation, preventing accidental detachment or damage.

[0042] The method for hoisting a motor rotor using the hoisting fixture of this utility model is as follows:

[0043] First, connect it to the lifting equipment (such as a crane or lifting machinery) via the lifting ring 1.

[0044] Subsequently, the operator moves the housing 6 upward along the axial direction. At this time, under the action of the spring 12, the pull claw 7 will open. When the pull claw assembly is fully open, it can be engaged in the unloading groove of the motor rotor.

[0045] Next, the operator moves the housing 6 downward along the axial direction. Guided by the guide ramp 71, the pull claw 7 will close tightly, thus firmly gripping the motor rotor.

[0046] After completing the above steps, the operator only needs to lift the lifting ring 1 using the lifting equipment to quickly lift the motor rotor.

[0047] Furthermore, the lifting ring and the connecting shaft are connected by bearing 4, which allows for adjustment of the angle and direction during the lifting process, making it easy to operate.

[0048] Compared with traditional methods, the hoisting fixture of this invention can not only quickly and firmly fix the motor rotor, but also achieve rapid hoisting through hoisting equipment, reducing the risk of work-related injuries, alleviating the labor intensity of operators, and significantly improving work efficiency.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hoisting fixture, characterized in that, The assembly includes a housing (6), a claw assembly, a connecting shaft (8), a bearing (4), and a lifting ring (1). The claw assembly includes multiple claws (7) arranged in a circular array. A spring (12) connects two adjacent claws (7). The housing (6) is sleeved on the outside of the claw assembly. The outside of the claws (7) is provided with a guide slope (71) for cooperating with the housing (6). The housing (6) can move axially to push the claw assembly to close. One end of the connecting shaft (8) is connected to the claw assembly, and the other end of the connecting shaft (8) is equipped with a bearing (4). The lifting ring (1) is connected to the bearing (4).

2. The hoisting fixture according to claim 1, characterized in that, The side wall of the pull claw (7) is provided with mounting holes (10) for installing springs (12), and the two ends of the springs (12) are respectively fixed in the mounting holes (10) on the adjacent two pull claws (7).

3. The hoisting fixture according to claim 1 or 2, characterized in that, The connecting shaft (8) includes a positioning frustum, a positioning cylinder and a connecting tube. The two ends of the positioning cylinder are connected to the positioning frustum and the connecting tube respectively. The diameter of the positioning frustum is larger than the diameter of the positioning cylinder. The end of the pull claw (7) is provided with a hook head that cooperates with the positioning frustum. The hook head is hooked on the positioning frustum.

4. The hoisting fixture according to claim 3, characterized in that, It also includes a cap (3), which is disposed at the upper end of the connecting cylinder.

5. The hoisting fixture according to claim 4, characterized in that, The bottom of the connecting cylinder is provided with a bushing (5), and the bearing (4) is installed between the bushing (5) and the cap (3).

6. The hoisting fixture according to claim 5, characterized in that, The bearing (4) is a double-direction thrust ball bearing (4). The double-direction thrust ball bearing (4) is installed in the connecting cylinder. The double-direction thrust ball bearing (4) includes an upper race, a shaft race, a lower race, a first ball cage, and a second ball cage. The upper end face of the upper race is close to the cap (3), and the lower end face of the lower race is close to the bushing (5).

7. The hoisting fixture according to claim 6, characterized in that, It also includes a lifting ring connector (2), through which the lifting ring (1) is connected to the bearing (4).

8. The hoisting fixture according to claim 7, characterized in that, The bearing (4) has a sleeve (13) in its inner hole, and the upper end of the sleeve (13) is connected to the lifting ring connector (2).

9. The hoisting fixture according to claim 3, characterized in that, It also includes a plug pin (9), the housing (6) is provided with a pin hole, one end of the plug pin (9) is inserted into the pin hole, the plug pin (9) passes through the housing (6) and abuts against the outer side wall of the connecting cylinder, so as to fix the housing (6) and the connecting cylinder.

10. The hoisting fixture according to claim 3, characterized in that, The puller assembly includes four pullers (7).

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