Rotor lifting fixture

Abstract

The present invention provides a rotor hoisting fixture, which belongs to the field of mechanical technology. It solves the problems of the existing rotor hoisting fixture, which has a complex structure, unsafe operation and a narrow scope of application. The rotor hoisting fixture comprises a horizontally arranged lifting arm, a column is fixedly connected to the lower side of the lifting arm, a lifting ring is provided on the lifting arm, a cylindrical and horizontally arranged positioning seat is fixedly connected to the lower end of the column, a screw is threadedly connected to the positioning seat, and the inner end of the screw extends out of the inner side wall of the positioning seat. The rotor hoisting fixture has the advantages of simple structure, reliable operation and a wide range of application.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a hoisting fixture, in particular to a rotor hoisting fixture. Background Art

[0002] At present, enterprises generally use vertical installation to pass the rotor of medium and large motors through the machine base. First, the machine base is placed vertically on a special assembly frame, and then the rotor is vertically hoisted and slowly inserted into the machine base. After insertion, the machine base must be turned over, and then the front and rear end covers and other components are assembled. This method is relatively cumbersome and labor-intensive. If it is not assembled properly, it often causes the rotor shaft to scratch the stator coil.

[0003] For example, a large motor core-threading integral hoisting method disclosed in a Chinese patent document (application number: 201510819057.9) uses a factory crane to cooperate with a hoisting composite beam to hoist the motor stator and rotor to the vicinity of the motor installation site; the extension shaft is connected and tightened with the motor rotor, and the motor rotor is hoisted by two cranes and a hoisting composite beam, and the rotor is slowly inserted from one side of the motor stator. After the extension shaft is exposed from the other side of the motor stator, the motor rotor is temporarily supported, and the hoisting wire rope is moved from one side of the motor stator to the other side; the rotor is slowly lifted and inserted into the inside of the motor stator to complete the "core threading" work of the motor;⑧ The motor stator is connected to the hoisting composite beam with a wire rope, and the rotor and stator are slowly lifted together after adjusting the center of gravity of the motor rotor. After the height exceeds the surface of the motor foundation, the two cranes are moved to hoist the motor as a whole to the motor foundation. The rotor is hoisted by driving the combined beam installed by two cranes, so its mechanism is complex, the work is unsafe, and the scope of application is not wide. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to provide a rotor lifting fixture which has a simple structure, reliable operation and a wide range of applications.

[0005] The objective of the present invention can be achieved through the following technical solutions: a rotor lifting fixture, comprising a transversely arranged lifting arm, the lower side of the lifting arm being fixedly connected to a column, characterized in that a lifting ring is provided on the lifting arm, the lower end of the column being fixedly connected to a cylindrical and horizontally arranged positioning seat, a screw being threadedly connected to the positioning seat and the inner end of the screw extending out of the inner side wall of the positioning seat.

[0006] When lifting, the rotor is placed horizontally so that one end of the rotor shaft is inserted into the positioning seat, and one end of the rotor is fixed to the positioning seat by tightening the screws. The lifting arm is lifted and translated by pulling the lifting ring to achieve the lifting of the rotor. It has the advantages of simple structure, reliable operation and a wide range of applications.

[0007] In the above-mentioned rotor hoisting fixture, the lower end of the hoisting ring is provided with a hoisting slider having a connecting hole through the middle, the hoisting arm passes through the connecting hole, the hoisting slider is threadedly connected with a locking screw, and the inner end of the locking screw abuts against the hoisting arm. The hoisting slider is fixed to the hoisting arm by the locking screw. When hoisting different rotors, the locking screw is loosened, and the position of the hoisting slider relative to the hoisting arm is adjusted to make the rotor hoisting fixture with the rotor in a balanced position. It has the advantages of easy adjustment, reliable use and wide application range.

[0008] In the above-mentioned rotor hoisting fixture, a limit pin is provided at the other end of the lifting arm connecting the column, and the outer end of the limit pin extends out of the outer wall of the lifting arm. By providing the above-mentioned limit pin, the lifting slider is prevented from falling off, which has the advantages of being easy to use and reliable.

[0009] In the above rotor hoisting fixture, a handrail is vertically fixed to the outer wall of the column, and the handrail and the lifting arm are located on both sides of the column and are arranged in parallel with the lifting arm. The position of the rotor can be adjusted by the handrail, which facilitates the movement and centering of the rotor, and has the advantage of more convenient hoisting.

[0010] In the above rotor hoisting fixture, a positioning sleeve is provided in the positioning seat, a through hole is formed in the side wall of the positioning sleeve, and the inner end of the screw extends out of the through hole. By replacing positioning sleeves with different inner diameters, the rotor hoisting fixture is applicable to rotors of different sizes, and has the advantages of simple structure and wide application range.

[0011] In the above rotor hoisting fixture, the positioning sleeve is provided with a plurality of positioning grooves, and the positioning grooves are provided with springs and balls, and the springs push the balls to extend out of the inner wall of the positioning sleeve. The outer wall of the rotor shaft is provided with positioning grooves, and when the shaft is embedded in the positioning sleeve, the springs push the balls to embed in the positioning grooves, which has the advantage of reliable positioning.

[0012] In the above rotor hoisting fixture, the outer end of the positioning sleeve is provided with a push ring capable of axial movement and the push ring can push the ball to retract into the positioning groove. When the rotor is removed from the positioning seat, the push ring is pushed to retract the ball into the positioning groove, and the removal is completed, which has the advantage of being more convenient to remove.

[0013] In the above-mentioned rotor hoisting fixture, a triangular reinforcing rib is provided between the column and the lifting arm. By providing the above-mentioned reinforcing rib, the strength and stability of the rotor hoisting fixture are improved.

[0014] In the above-mentioned rotor hoisting fixture, the cross-section of the lifting arm is rectangular. With the above-mentioned arrangement, the lifting arm is not easily deformed, thereby increasing its service life.

[0015] Compared with the existing technology, this rotor lifting fixture has the following advantages:

[0016] 1. Fix one end of the rotor on the positioning seat by tightening the screws, and pull the lifting arm up and translate it through the lifting ring to realize the lifting of the rotor. It has the advantages of simple structure, reliable operation and wide application range;

[0017] 2. When hoisting different rotors, loosen the locking screw and adjust the position of the lifting slider relative to the lifting arm so that the rotor hoisting fixture with the rotor is in a balanced position. It has the advantages of easy adjustment, reliable use and a wide range of applications.

[0018] 3. By setting the above-mentioned limit pin, the lifting slider is prevented from falling off, which has the advantages of being easy to use and reliable;

[0019] 4. By replacing positioning sleeves with different inner diameters, the rotor lifting fixture can be applied to rotors of different sizes, and has the advantages of simple structure and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a working schematic diagram of the first embodiment of the rotor lifting fixture.

[0021] Figure 2 yes Figure 1 AA cross-sectional view of .

[0022] Figure 3 It is a schematic diagram of the assembly of the positioning seat of the second embodiment of the rotor lifting fixture.

[0023] In the figure, 1, lifting arm; 2, column; 3, lifting ring; 3a, lifting slider; 4, positioning seat; 5, screw; 6, locking screw; 7, limit pin; 8, handrail; 9, positioning sleeve; 9a, positioning groove; 10, spring; 11, ball; 12, push ring; 14, rotor. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] Embodiment 1

[0026] like Figure 1 and 2As shown, the rotor hoisting fixture comprises a horizontally arranged lifting arm 1, the cross-section of the lifting arm 1 is rectangular, so that the lifting arm 1 is not easily deformed, and the service life is increased. A column 2 is fixedly connected to the lower side of the lifting arm 1, and a triangular reinforcing rib is provided between the column 2 and the lifting arm 1 to improve the strength and stability of the rotor hoisting fixture.

[0027] The lifting arm 1 is provided with a lifting ring 3, and the lower end of the column 2 is fixedly connected with a cylindrical and horizontally arranged positioning seat 4, and a positioning sleeve 9 is provided in the positioning seat 4. The side wall of the positioning sleeve 9 is penetrated with a through hole, and a screw 5 is threadedly connected to the positioning seat 4, and the inner end of the screw 5 extends out of the through hole. The lower end of the lifting ring 3 is provided with a lifting slider 3a with a through connection hole in the middle, and the lifting arm 1 passes through the connection hole. The lifting slider 3a is threadedly connected with a locking screw 6, and the inner end of the locking screw 6 rests on the lifting arm 1. The other end of the lifting arm 1 connected to the column 2 is provided with a limit pin 7, and the outer end of the limit pin 7 extends out of the outer wall of the lifting arm 1 to prevent the lifting slider 3a from falling off, which has the advantages of being easy to use and reliable to use.

[0028] A handrail 8 is vertically fixedly connected to the outer wall of the column 2 , and the handrail 8 and the lifting arm 1 are located on both sides of the column 2 , and the handrail 8 and the lifting arm 1 are arranged in parallel.

[0029] During lifting, the rotor 14 is placed horizontally so that one end of the rotating shaft of the rotor 14 is inserted into the positioning seat 4, and one end of the rotor 14 is fixed to the positioning seat 4 by tightening the screw 5. The lifting arm 1 is lifted and translated by the lifting ring 3 to realize the lifting of the rotor 14. It has the advantages of simple structure, reliable operation and wide application range. The position of the rotor 14 is adjusted by the handrail 8, which is convenient for the movement and centering of the rotor 14, and has the advantage of more convenient lifting. The lifting slider 3a is fixed to the lifting arm 1 by the locking screw 6. When lifting different rotors 14, the locking screw 6 is loosened, and the position of the lifting slider 3a relative to the lifting arm 1 is adjusted to make the rotor lifting fixture equipped with the rotor 14 in a balanced position. It has the advantages of convenient adjustment, reliable use and wide application range.

[0030] By replacing the positioning sleeves 9 with different inner diameters, the rotor hoisting fixture can be adapted to rotors 14 of different sizes, and has the advantages of simple structure and wide application range.

[0031] Embodiment 2

[0032] The structure and principle of this embodiment are roughly the same as those of the first embodiment, except that: Figure 3As shown, the positioning sleeve 9 is provided with a plurality of positioning grooves 9a, and the positioning grooves 9a are provided with springs 10 and balls 11, and the springs 10 push the balls 11 to extend out of the inner side wall of the positioning sleeve 9. The outer end of the positioning sleeve 9 is provided with a push ring 12 that can move axially, and the push ring 12 is threadedly connected to one end of the positioning sleeve 9, and the inner end surface of the push ring 12 has a tapered surface, and the tapered surface of the push ring 12 can push the balls 11 to retract into the positioning grooves 9a. The outer wall of the rotating shaft of the rotor 14 is provided with positioning grooves 9a, and when the rotating shaft of the rotating shaft is embedded in the positioning sleeve 9, the springs 10 push the balls 11 to be embedded in the positioning grooves 9a, which has the advantage of reliable positioning. When the rotor 14 is removed from the positioning seat 4, the push ring 12 is rotated to move the push ring 12 axially, and the tapered surface of the push ring 12 pushes the balls 11 to retract into the positioning grooves 9a, and the removal can be completed, which has the advantage of convenient removal.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0034] Although the present invention uses more terms such as lifting arm 1, column 2, lifting ring 3, lifting slider 3a, positioning seat 4, screw 5, locking screw 6, limit pin 7, handrail 8, positioning sleeve 9, positioning groove 9a, spring 10, ball 11, push ring 12, rotor 14, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A rotor lifting fixture, comprising a lifting arm (1) arranged transversely, wherein a column (2) is fixedly connected to the lower side of the lifting arm (1), characterized in that: The lifting arm (1) is provided with a lifting ring (3), the lower end of the column (2) is fixedly connected with a cylindrical and horizontally arranged positioning seat (4), the positioning seat (4) is threadedly connected with a screw (5), and the inner end of the screw (5) protrudes from the inner side wall of the positioning seat (4), the positioning seat (4) is provided with a positioning sleeve (9), the side wall of the positioning sleeve (9) is penetrated with a through hole, the inner end of the screw (5) protrudes from the through hole, the positioning sleeve (9) is provided with a plurality of positioning grooves (9a), the positioning groove (9a) is provided with a spring (10) and a ball (11), the spring (10) pushes the ball (11) to protrude from the inner side wall of the positioning sleeve (9), the outer end of the positioning sleeve (9) is provided with a push ring (12) capable of axial movement, and the push ring (12) can push the ball (11) to retract into the positioning groove (9a).

2. The rotor hoisting fixture according to claim 1, characterized in that: The lower end of the lifting ring (3) is provided with a lifting slider (3a) with a connecting hole passing through the middle, and the lifting arm (1) passes through the connecting hole. A locking screw (6) is threadedly connected to the lifting slider (3a), and the inner end of the locking screw (6) rests on the lifting arm (1).

3. The rotor hoisting fixture according to claim 1, characterized in that: A limit pin (7) is provided at the other end of the lifting arm (1) connected to the column (2), and the outer end of the limit pin (7) extends out from the outer side wall of the lifting arm (1).

4. The rotor hoisting fixture according to claim 1, 2 or 3, characterized in that: A handrail (8) is vertically fixedly connected to the outer wall of the column (2), and the handrail (8) and the lifting arm (1) are located on both sides of the column (2), and the handrail (8) and the lifting arm (1) are arranged in parallel.

5. The rotor hoisting fixture according to claim 1, 2 or 3, characterized in that: A triangular reinforcing rib is provided between the upright column (2) and the lifting arm (1).

6. The rotor hoisting fixture according to claim 1, 2 or 3, characterized in that: The cross-sectional shape of the lifting arm (1) is rectangular.

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