CN220660738U - Quick screwing device for ceiling expansion bolts - Google Patents

Abstract

The utility model discloses a quick screwing device of a ceiling expansion bolt, which comprises an operating rod, wherein a positioning sleeve is fixedly arranged on the outer side wall of the top of the operating rod, and the positioning sleeve is axially parallel to the operating rod; a tightening sleeve is coaxially arranged in the positioning sleeve, the tightening sleeve can rotate in the positioning sleeve by 360 degrees, an inner hexagonal groove is formed in the inner wall of the top of the tightening sleeve, and the positioning sleeve and the tightening sleeve are of cylindrical structures with upper openings and lower openings which are communicated; the top of the operating rod is provided with a rotating motor, the rotating motor and the tightening sleeve are provided with a transmission part, and the transmission part transmits the torque output by the rotating motor to the tightening sleeve; the bottom of the operating rod is provided with a motor control part. The utility model has simple and convenient operation, the constructor can master the operation quickly without manual rotation operation, and the rotating motor can be controlled to drive the inner sleeve to rotate by pressing the button on the motor control part, thereby greatly improving the working efficiency and reducing the labor intensity.

Description

Quick screwing device for ceiling expansion bolts

Technical Field

The utility model relates to the technical field of nut assembling and disassembling tools, in particular to a quick screwing device for a ceiling expansion bolt.

Background

At present, most of the assembled and repaired suspended ceilings are constructed by adopting light materials, suspended ceiling keels are installed on suspenders, one ends of the suspenders are connected with the suspended ceiling keels, the other ends of the suspenders are connected with expansion bolts, and the weight of the suspended ceilings is conducted onto a floor slab. For even furred ceiling load, expansion bolts distributes and almost disperses in each position in room, for tightening expansion bolts, constructors need to be with the help of ascending operation platform can accomplish the work of screwing up in the platform radiation area, and the operation in next piece region is carried out to the mobile platform, and the work generally needs to be equipped with 2 people 1 group cooperation and accomplishes like this, and installation effectiveness is not high, and still can bring certain security risk at the overhead operation.

In the existing ceiling expansion bolt tightening tool, as disclosed in the patent application number 202122529244.7, the ceiling screw nut tightening device comprises a rod body, wherein angle irons are fixed on the side surface of the rod body, elbows are fixed on the angle irons, the end parts of the elbows are fixed with a tightening head, the tightening head comprises a cylinder body, the upper end and the lower end of the cylinder body are provided with openings, an annular baffle is fixed on the inner wall of the cylinder body, a through hole is formed in the center of the annular baffle, an inner hexagonal groove is formed in the cylinder body above the annular baffle, a notch P is formed in the cylinder body, a notch Q is formed in the annular baffle, and the notch P is communicated with the notch Q to form a notch. The patent also has the following technical problems:

1. the suspended ceiling screw is arranged at a high position, when a constructor operates the device, the constructor needs to look up the suspended ceiling screw, the opening Q and the opening P of the cylinder body are too small, and the constructor can hardly clamp the inner hexagonal groove on the nut;

2. when the device is used, the device is not coaxial with the suspended ceiling screw, and constructors need to operate the device to rotate around the suspended ceiling screw, so that the operation is inconvenient;

3. the diameter of the suspended ceiling screw is generally not more than 12mm, so that the screw pitch of the suspended ceiling screw is 1-1.75mm, the device is manually operated to rotate for one circle, the screw-in distance of the nut is limited, the suspended ceiling screw is relatively long, constructors can rotate hundreds of circles on the device to screw the nut in place, and the suspended ceiling screw is time-consuming and labor-consuming.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing a rapid screwing device for a ceiling expansion bolt.

The utility model is realized by the following technical scheme:

a quick tightening device for ceiling expansion bolts, comprising:

an operation lever (1);

the positioning sleeve (2) is in a cylindrical structure with a through upper opening and a through lower opening, the positioning sleeve (2) is fixedly arranged on the outer side wall of the top of the operating rod (1) and is axially parallel to the operating rod (1) and used for installing, positioning and screwing the sleeve (3);

the screwing sleeve (3) is in a cylindrical structure with a through upper opening and a through lower opening, the lower half part of the screwing sleeve (3) is coaxially arranged in the positioning sleeve (2) and can rotate 360 degrees in the positioning sleeve (2), and an inner hexagonal groove (311) is formed in the inner wall of the top of the screwing sleeve (3) and used for being clamped on a ceiling nut (81) of the ceiling screw (8) to limit;

the rotating motor (4) is arranged at the top of the operating rod (1) and is used for driving the tightening sleeve (3) to rotate;

a transmission member (5) provided to the rotating electric machine (4) and the tightening sleeve (3) and configured to transmit torque output from the rotating electric machine (4) to the tightening sleeve (3);

and the motor control part (6) is arranged at the bottom of the operating rod (1) and is used for controlling the rotating motor (4) to rotate.

Still further, screw up sleeve (3) include inner skleeve (31) and outer sleeve (32), outer sleeve (32) coaxial rotation sets up in positioning sleeve (2), inner skleeve (31) lower part coaxial rotation sets up in the upper position in outer sleeve (32), interior hexagonal groove (311) set up on the inner wall at inner skleeve (31) top.

The upper end of the inner sleeve (31) is provided with a mounting guide device (7), the mounting guide device (7) consists of a plurality of guide plates (71) which are obliquely hinged on the circumference of the outer wall of the upper end of the inner sleeve (31), a torsion spring (72) is arranged on a hinge shaft of the guide plates (71), and two ends of the torsion spring (72) are respectively limited on the outer wall of the inner sleeve (31) and the lower surface of the guide plates (71); when the torsion spring (72) resets, the edges of two adjacent guide plates (71) are contacted.

In a further scheme, when no external force is applied to the guide plate (71), the axial included angle between the plate surface of the guide plate (71) and the inner sleeve (31) is 30-60 degrees.

In a further scheme, the transmission part (5) comprises a driving gear (51) and a driven gear (52) which are meshed, the driving gear (51) is coaxially arranged on an output shaft of the rotating motor (4), and the driven gear (52) is coaxially sleeved on the outer wall of the outer sleeve (32).

In a further scheme, an external spline is arranged on the outer wall of the lower part of the inner sleeve (31), an internal spline is arranged on the outer wall of the upper part of the outer sleeve (32), the external spline is matched with the internal spline, and the inner sleeve (31) is connected with the outer sleeve (32) through the spline.

In a further scheme, the tightening sleeve (3) is provided with a plurality of inner sleeves (31) with different inner hexagonal grooves (311), and the inner sleeves (31) with the different inner hexagonal grooves (311) are used for adapting to ceiling nuts (81) of ceiling screws (8) with different sizes.

In a further scheme, a storage battery (41) is arranged at the lower position in the operating rod (1), and the storage battery (41) is electrically connected with the rotating motor (4).

In a further scheme, a grab handle (11) is arranged at the bottom of the operating rod (1), and the motor control part (6) is arranged on the grab handle (11);

the motor control part (6) comprises a main switch (61), a motor forward rotation button (62) and a motor reverse rotation button (63).

In a further scheme, the inner diameters of the positioning sleeve (2), the inner sleeve (31) and the outer sleeve (32) are larger than 12mm.

The working principle of the utility model is as follows:

according to the utility model, the tightening sleeve (3) for rotating the ceiling nut (81) is coaxially arranged on the positioning sleeve (2) at the top of the operating rod (1), the ceiling nut (81) is embedded into the inner hexagonal groove (311) at the top of the tightening sleeve (3), the positioning sleeve (2) is fixed on the outer side wall at the top of the operating rod (1) and is axially parallel to the operating rod (1), and both the positioning sleeve (2) and the tightening sleeve (3) are of cylindrical structures with upper openings and lower openings, so that the longer ceiling screw (8) can penetrate out from the tightening sleeve (3) and the positioning sleeve (2); the top of the operating rod (1) is fixedly provided with a rotating motor (4), the rotating motor (4) is powered by a storage battery (41) arranged in the operating rod (1), a motor control component (6) on a grab handle (11) at the bottom of the operating rod (1) is pressed to control the rotating motor (4) to positively rotate or reversely rotate, and the rotating motor (4) drives a tightening sleeve (3) to rotate through the motor control component (6), so that a suspended ceiling nut (81) embedded in an inner hexagonal groove (311) is driven to rotate to realize unscrewing or screwing.

The screwing sleeve (3) is divided into an inner sleeve (31) and an outer sleeve (32) and is of a double-sleeve structure, an inner hexagonal groove (311) is formed in the top of the inner sleeve (31), and the inner sleeve (31) with the inner hexagonal groove (311) in different sizes is replaced to realize the disassembly and assembly of suspended ceiling nuts (81) in different sizes; four guide plates (71) with torsion springs (72) are hinged to the outer side of the top of the inner sleeve (31), and the four guide plates (71) are encircled to form a horn-shaped structure to serve as guide openings for butt joint of the device and a suspended ceiling screw (8); when the guide plate (71) contacts the ceiling or the suspended ceiling, the guide plate is gradually flattened by the ceiling or the suspended ceiling, and the suspended ceiling nut (81) is not influenced to be screwed in place.

Compared with the prior art, the utility model has the beneficial effects that:

1. the device can be operated by a person without the auxiliary construction of other tools, so that the preparation time is shortened; and can realize that alone accomplishes the operation, practice thrift the cost of labor, improve labor efficiency.

2. The utility model has simple and convenient operation, has no great technical difficulty, is fast to grasp by workers, does not need manual rotation operation, can control the rotating motor (4) to drive the inner sleeve (31) to rotate by pressing the button on the motor control component (6), greatly improves the working efficiency and reduces the labor intensity.

3. The device can be operated by only standing on the ground when a worker operates the device, does not need to use a climbing tool or climbing operation, eliminates hidden danger of high falling risk, saves tool use cost and in-site transportation cost, improves work efficiency and reduces labor intensity.

4. The horn mouth formed by the installation guiding device (7) of the inner sleeve (31) at the top of the utility model is convenient for constructors to operate the device to align with the suspended ceiling screw (8), has guiding function and improves the installation efficiency; at the same time, the four guide plates (71) of the installation guide device (7) can be rotationally flattened, and the four guide plates (71) can not block the suspended ceiling nut (81) from being screwed to be in contact with the ceiling or the suspended ceiling.

5. The rust-proof layer and the waterproof layer are coated on the outer part of the device, so that rust can be prevented, and the service life of the whole device is prolonged; meanwhile, the self-luminous fluorescent material is coated outside the device, so that the position of the device can be clearly marked at night or in a dark room and in an underground construction environment, the effect of safety prompt can be effectively played, the eye-catching degree is improved, people can easily distinguish the device, and the safety in construction and life is improved.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic perspective view of the top part of the present utility model;

FIG. 3 is a cross-sectional view of the top of the present utility model;

FIG. 4 is a schematic view of the inner sleeve and installation guide of the present utility model;

FIG. 5 is a schematic view of the handle portion of the present utility model;

FIG. 6 is one of the usage patterns of the present utility model;

FIG. 7 is a second view of the present utility model;

FIG. 8 is a third view of the present utility model.

Reference numerals in the drawings:

1-an operating rod and 11-a grab handle;

2-positioning the sleeve;

3-screwing the sleeve, 31-the inner sleeve, 311-the inner hexagonal groove and 32-the outer sleeve;

4-rotating electric machine, 41-accumulator;

5-transmission part, 51-driving gear and 52-driven gear;

6-motor control parts, 61-master switches, 62-motor forward buttons and 63-motor forward buttons;

7-mounting guide devices, 71-guide plates and 72-torsion springs;

8-ceiling screw rod, 81-ceiling nut.

Detailed Description

In order to enable those skilled in the art to better understand the technical scheme of the present utility model, the following detailed description is provided with reference to the accompanying drawings.

As shown in fig. 1-8, a rapid tightening device of a ceiling expansion bolt comprises an operating rod 1, wherein a positioning sleeve 2 is fixedly arranged on the outer side wall of the top of the operating rod 1, and the positioning sleeve 2 is axially parallel to the operating rod 1; the positioning sleeve 2 is internally and coaxially provided with a tightening sleeve 3, the tightening sleeve 3 can rotate 360 degrees in the positioning sleeve 2, the inner wall of the top of the tightening sleeve 3 is provided with an inner hexagonal groove 311, and the positioning sleeve 2 and the tightening sleeve 3 are of cylindrical structures with upper and lower openings communicated; the top of the operating rod 1 is provided with a rotating motor 4, the rotating motor 4 and the tightening sleeve 3 are provided with a transmission part 5, and the transmission part 5 transmits the torque output by the rotating motor 4 to the tightening sleeve 3; the bottom of the operating lever 1 is provided with a motor control part 6.

In some embodiments, as shown in fig. 3, the tightening sleeve 3 comprises an inner sleeve 31 and an outer sleeve 32, the outer sleeve 32 is coaxially and rotatably arranged in the positioning sleeve 2, the lower part of the inner sleeve 31 is coaxially and rotatably arranged at the upper part in the outer sleeve 32, and the inner hexagonal groove 311 is arranged on the inner wall of the top part of the inner sleeve 31; the tightening sleeve 3 is designed as a double sleeve structure, so that the inner sleeve 31 with the inner hexagonal groove 311 can be replaced, and the inner sleeve 31 with the inner hexagonal groove 311 with different sizes can be replaced.

In some embodiments, as shown in fig. 1-4, the upper end of the inner sleeve 31 is provided with a mounting guide device 7, the mounting guide device 7 is composed of a plurality of guide plates 71 which are obliquely hinged on the circumference of the outer wall of the upper end of the inner sleeve 31, a torsion spring 72 is arranged on the hinge shaft of the guide plates 71, and two ends of the torsion spring 72 are respectively limited on the outer wall of the inner sleeve 31 and the lower surface of the guide plates 71; the installation guiding device 7 is used as a horn-shaped guide opening of the hexagonal groove 311 in the top of the inner sleeve 31, so that a constructor can operate the device to align with the suspended ceiling screw 8; when constructor aims at the installation guiding device 7 at the top of the device at the suspended ceiling screw rod 8, and holds the operating rod 1 to push upwards slowly, the bottom end of the suspended ceiling screw rod 8 is propped against the guide plate 71 of the installation guiding device 7, the pushing force of the constructor pushing upwards is smaller than the deformation force of the torsion spring 72, the guide plate 71 cannot be flattened easily, the bottom end of the suspended ceiling screw rod 8 slides down into the inner hexagonal groove 311 along the plate surface of the guide plate 71 and penetrates through the inner sleeve 31 and the outer sleeve 32, and the suspended ceiling screw rod penetrates out from the bottom end of the positioning sleeve 2.

In some embodiments, as shown in fig. 2, the installation guide device 7 includes four guide plates 71, and when the torsion springs 72 are reset, edges of two adjacent guide plates 71 are contacted; the four guide plates 71 are surrounded into a horn-like structure.

In some embodiments, as shown in fig. 3, when no external force is applied to the guide plate 71, the included angle between the plate surface of the guide plate 71 and the axial direction of the inner sleeve 31 is 30-60 degrees; if the slope of the plate surface of the guide plate 71 is too small, the bottom end of the suspended ceiling screw 8 is easy to flatten the guide plate 71 and is not easy to slide down along the plate surface of the guide plate 71; if the slope of the plate surface of the guide plate 71 is too large, the horn mouth formed by surrounding the four guide plates 71 is too small, and a constructor operating the device is not easy to align the horn mouth formed by surrounding the four guide plates 71 to the bottom end of the suspended ceiling screw 8; if the panel surface of the guide plate 71 is nearly vertical, the edge of the guide plate 71 is at a dead point position, and the guide plate 71 is difficult to rotate downwards to open when touching a suspended ceiling or a ceiling, and the suspended ceiling nut 81 is not screwed in place.

In some embodiments, the edges of the guide plate 71 may be provided with a flexible protective cushion, which may be made of rubber, cotton, latex, or the like, and which may protect the ceiling or ceiling from being scratched by the guide plate 71 when the guide plate 71 is in contact with the ceiling or ceiling.

In some embodiments, as shown in fig. 1-3, the transmission part 5 comprises a driving gear 51 and a driven gear 52 which are meshed, the driving gear 51 is coaxially arranged on the output shaft of the rotating motor 4, and the driven gear 52 is coaxially sleeved on the outer wall of the outer sleeve 32; when the rotary motor 4 works, the driving gear 51 on the output shaft of the rotary motor 4 drives the driven gear 52 to rotate, so that the outer sleeve 32 rotates and the inner sleeve 31 rotates.

In some embodiments, the transmission 5 may also be implemented as an alternative belt or chain transmission.

In some embodiments, an external spline is arranged on the outer wall of the lower part of the inner sleeve 31, an internal spline is arranged on the outer wall of the upper part of the outer sleeve 32, the external spline is matched with the internal spline, and the inner sleeve 31 is connected with the outer sleeve 32 through the spline; while ensuring the synchronous rotation of the inner sleeve 31 and the outer sleeve 32, the inner sleeve 31 is detachably installed, and the inner sleeve 31 of the hexagonal groove 311 in different sizes can be replaced, so that the suspended ceiling nuts 81 in different sizes can be dismounted.

In some embodiments, as shown, the tightening sleeve 3 is provided with several inner sleeves 31 having different sizes of the inner hexagonal grooves 311, the inner sleeves 31 of the different sizes of the inner hexagonal grooves 311 being used to fit the ceiling nuts 81 of the different sizes of the ceiling screws 8.

In some embodiments, as shown in the figure, a battery 41 is disposed at a lower position within the operation lever 1, and the battery 41 is electrically connected with the rotating electric machine 4; the device can be used without plugging a commercial power socket, and is convenient to use.

In some embodiments, as shown in fig. 1 and 6, a grab handle 11 is arranged at the bottom of the operating rod 1, and the grab handle 11 is convenient for a constructor to grasp. The motor control part 6 is arranged on the grab handle 11, and the motor control part 6 comprises a main switch 61, a motor forward rotation button 62 and a motor reverse rotation button 63; the main switch 61 is used for controlling the on-off of the circuit of the rotating motor 4; the motor forward rotation button 62 is used for controlling the rotary motor 4 to rotate clockwise; the motor reverse rotation button 63 is used to control the rotation motor 4 to rotate counterclockwise.

In some embodiments, the operating lever 1 is a telescopic or folding lever structure; when the operating rod 1 is a telescopic rod, the length can be freely telescopic and adjustable, and the operating rod can be selected according to the height of an operating position layer and the comfort level of the height of an operator; the telescopic rod or the folding rod is convenient for the contraction and carrying of the operating rod 1.

In some embodiments, the motor forward rotation button 62 and the motor reverse rotation button 63 are click control switches, and the motor forward rotation button 62 and the motor reverse rotation button 63 are pressed to be in an on state, and after being released, the motor forward rotation button 62 and the motor reverse rotation button 63 can automatically spring up to disconnect the circuit for resetting so as to control the start and stop operation of the small-sized rotary electric machine 4.

In some embodiments, the inner diameters of the positioning sleeve 2, the inner sleeve 31 and the outer sleeve 32 are greater than 12mm; the diameter of the ceiling screw 8 is typically no more than 12mm, so that the inner diameters of the positioning sleeve 2, the inner sleeve 31 and the outer sleeve 32 can be adapted to the ceiling screw 8 of the largest size.

In some embodiments, the rust-proof layer and the waterproof layer are coated on the outer part of the device, so that rust can be prevented, and the service life of the whole device is prolonged; meanwhile, the self-luminous fluorescent material is coated outside the device, so that the position of the device can be clearly marked at night or in a dark room and in an underground construction environment, the effect of safety prompt can be effectively played, the eye-catching degree is improved, people can easily distinguish the device, and the safety in construction and life is improved.

The working mode of the utility model is as follows:

the device is used when:

step 1: the constructor carries the device to the construction site in advance, and the inner sleeve 31 corresponding to the inner hexagonal groove 311 and the suspended ceiling nut 81 in size is replaced according to the sizes of the suspended ceiling screw 8 and the suspended ceiling nut 81 in the construction site.

Step 2: the constructor holds the grab handle 11 on the operating rod 1 to vertically lift the device, aims the horn mouth of the installation guide device 7 at the bottom end of the first suspended ceiling screw rod 8, slowly lifts the device upwards, the bottom end of the suspended ceiling screw rod 8 firstly abuts against the guide plate 71 of the installation guide device 7, then slides down into the inner hexagonal groove 311 along the plate surface of the guide plate 71, passes through the inner sleeve 31 and the outer sleeve 32, and penetrates out of the bottom end of the positioning sleeve 2.

Step 3: when the inner hexagonal groove 311 rises to the position of the ceiling nut 81, the constructor holds the handle 11 to lightly push upwards and slightly rotates the device until the ceiling nut 81 is embedded into the inner hexagonal groove 311.

Step 4: pressing the main switch 61 to connect the storage battery 41 with the circuit of the rotary motor 4, and then pressing the motor forward rotation button 62 or the motor reverse rotation button 63 according to the screw thread rotation direction of the suspended ceiling nut 81 to enable the suspended ceiling nut 81 to rotate and rise until the suspended ceiling nut 81 is screwed in place; after the ceiling nut 81 is screwed in place, the motor forward rotation button 62 or the motor reverse rotation button 63 in the pressed state is loosened, so that the rotation of the rotary motor 4 is stopped;

when the horn mouth at the upper end of the guide plate 71 is in contact with the ceiling or the suspended ceiling, a constructor can press the motor forward rotation button 62 or the motor reverse rotation button 63 in a quick click mode to enable the horn mouth at the upper end of the guide plate 71 to be in contact with the ceiling or the suspended ceiling slowly, so that the guide plate 71 is prevented from being damaged due to the fact that the rotating speed of the guide plate 71 is too high.

Step 5: the constructor vertically pulls the device downwards to separate the device from the suspended ceiling screw rod 8 after the installation is completed, then moves the device to the lower part of the next suspended ceiling screw rod 8, and operates according to the operation steps from the step 2 to the step 4 until all suspended ceiling nuts 81 on the suspended ceiling screw rods 8 are screwed in place.

It should be noted that the foregoing describes the technical solution of the present utility model in detail, and describes the principles of the present utility model, and the description of the above working principles is only used to help understand the core idea of the present utility model. It should be noted that it will be apparent to those skilled in the art that the present utility model may be modified and adapted without departing from the principles of the present utility model, and such modifications and adaptations are intended to be within the scope of the appended claims.

Modifications, additions, or substitutions to the described embodiments may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The quick screwing device of the ceiling expansion bolt comprises an operating rod (1), and is characterized by further comprising:

the positioning sleeve (2) is in a cylindrical structure with a through upper opening and a through lower opening, the positioning sleeve (2) is fixedly arranged on the outer side wall of the top of the operating rod (1) and is axially parallel to the operating rod (1) and used for installing, positioning and screwing the sleeve (3);

the screwing sleeve (3) is in a cylindrical structure with a through upper opening and a through lower opening, the lower half part of the screwing sleeve (3) is coaxially arranged in the positioning sleeve (2) and can rotate 360 degrees in the positioning sleeve (2), and an inner hexagonal groove (311) is formed in the inner wall of the top of the screwing sleeve (3) and used for being clamped on a ceiling nut (81) of the ceiling screw (8) to limit;

the rotating motor (4) is arranged at the top of the operating rod (1) and is used for driving the tightening sleeve (3) to rotate;

a transmission member (5) provided to the rotating electric machine (4) and the tightening sleeve (3) and configured to transmit torque output from the rotating electric machine (4) to the tightening sleeve (3);

and the motor control part (6) is arranged at the bottom of the operating rod (1) and is used for controlling the rotating motor (4) to rotate.

2. The quick tightening device for ceiling expansion bolts according to claim 1, characterized in that: the tightening sleeve (3) comprises an inner sleeve (31) and an outer sleeve (32), the outer sleeve (32) is coaxially and rotatably arranged in the positioning sleeve (2), the lower part of the inner sleeve (31) is coaxially and rotatably arranged at the upper part in the outer sleeve (32), and the inner hexagonal groove (311) is formed in the inner wall of the top of the inner sleeve (31).

3. The quick tightening device for ceiling expansion bolts according to claim 2, characterized in that: the upper end of the inner sleeve (31) is provided with a mounting guide device (7), the mounting guide device (7) is composed of a plurality of guide plates (71) which are obliquely hinged on the circumference of the outer wall of the upper end of the inner sleeve (31), a torsion spring (72) is arranged on a hinge shaft of the guide plate (71), and two ends of the torsion spring (72) are respectively limited on the outer wall of the inner sleeve (31) and the lower surface of the guide plate (71); when the torsion spring (72) resets, the edges of two adjacent guide plates (71) are contacted.

4. A quick tightening device for expansion bolts of ceilings according to claim 3, characterized in that: when no external force is applied to the guide plate (71), the axial included angle between the plate surface of the guide plate (71) and the inner sleeve (31) is 30-60 degrees.

5. The quick tightening device for ceiling expansion bolts according to claim 2, characterized in that: the transmission part (5) comprises a driving gear (51) and a driven gear (52) which are meshed, the driving gear (51) is coaxially arranged on an output shaft of the rotating motor (4), and the driven gear (52) is coaxially sleeved on the outer wall of the outer sleeve (32).

6. The quick tightening device for ceiling expansion bolts according to claim 2, characterized in that: the outer wall of the lower part of the inner sleeve (31) is provided with an external spline, the outer wall of the upper part of the outer sleeve (32) is provided with an internal spline, the external spline is matched with the internal spline, and the inner sleeve (31) is connected with the outer sleeve (32) through the spline.

7. The quick tightening device for ceiling expansion bolts according to claim 2, characterized in that: the tightening sleeve (3) is provided with a plurality of inner sleeves (31) with different inner hexagonal grooves (311), and the inner sleeves (31) of the inner hexagonal grooves (311) with different sizes are used for being matched with ceiling nuts (81) of ceiling screws (8) with different sizes.

8. The quick tightening device for ceiling expansion bolts according to claim 1, characterized in that: the lower part in the operating rod (1) is provided with a storage battery (41), and the storage battery (41) is electrically connected with the rotating motor (4).

9. The quick tightening device for ceiling expansion bolts according to claim 8, characterized in that: the bottom of the operating rod (1) is provided with a grab handle (11), and the motor control part (6) is arranged on the grab handle (11);

the motor control part (6) comprises a main switch (61), a motor forward rotation button (62) and a motor reverse rotation button (63).

10. The quick tightening device for ceiling expansion bolts according to claim 2, characterized in that: the inner diameters of the positioning sleeve (2), the inner sleeve (31) and the outer sleeve (32) are larger than 12mm.