Rapid screwing device for large nut

Abstract

The utility model relates to a large nut quick screwing device which comprises a pneumatic motor, a worm, a worm gear and an annular cover, the worm gear is rotatably connected in the annular cover, the worm is rotatably connected to the side face of the annular cover and is in transmission connection with the worm gear, a handle is arranged on the side face of the annular cover, and the pneumatic motor is installed on the side face of the handle. One end of the pneumatic motor is in transmission connection with one end of the worm, and a through first inner hexagonal groove is formed in the middle of the worm gear. The device is simple in structure, convenient to operate and high in screwing efficiency; by fixing the large bolt and adopting the pneumatic motor and the worm to drive the worm gear, the large nut is quickly screwed to the target position on the large bolt, a single operator can quickly screw nuts of various specifications such as M90-M54 and the like, one nut can be screwed in place in 15 seconds on average, and compared with a manual screwing mode consuming about 3 minutes, the efficiency is improved by about 12 times.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical assembly, in particular to a large nut quick screwing device. Background Art

[0002] In the petrochemical industry, large equipment flanges and pipeline flanges need to be assembled with about 20 sets of bolts. Each bolt is generally equipped with 2 nuts, and workers usually rely on their hands to manually screw the nuts into place along the screw one circle at a time, and then use a hydraulic torque wrench to tighten them step by step. Since the bolts of large equipment and pipeline flanges are large, the nuts are generally heavy. For example, an M90 nut weighs 2 kilograms. The operation process requires a worker to hold a nut with both hands and manually screw it out or in along the screw one circle at a time. Usually, a nut needs to be manually turned about 150 times, and each nut takes about 3 minutes. This work requires a lot of labor consumption, the labor intensity of workers is high, and the labor efficiency is extremely low. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a large nut fast screwing device with simple structure, convenient operation and high screwing efficiency. A nut can be screwed into place in an average of 15 seconds, and the efficiency is improved by about 12 times.

[0004] The technical solution of the utility model is: a large nut fast screwing device, including an air motor, a worm, a worm wheel and an annular cover, the worm wheel is rotatably connected in the annular cover, the worm is rotatably connected to the side of the annular cover, the worm is transmission-connected to the worm wheel, a handle is provided on the side of the annular cover, the air motor is installed on the side of the handle, one end of the air motor is transmission-connected to one end of the worm, and a first through-going hexagonal groove is provided in the middle of the worm wheel.

[0005] Furthermore, a reducing ring may be installed on the worm wheel, the reducing ring and the worm wheel are connected by screws, and a second inner hexagonal groove is provided in the middle of the reducing ring.

[0006] Furthermore, the reducer ring is provided with a regular hexagonal ring, and the regular hexagonal ring can be installed in the first inner hexagonal groove.

[0007] Furthermore, the worm wheel and the annular cover, and the worm and the annular cover are connected via bearings.

[0008] Furthermore, an anti-slip ring is provided on the handle.

[0009] Furthermore, the handle is connected to the pneumatic motor via a bracket.

[0010] Furthermore, it also includes a clamping mechanism and a slider, one end of the clamping mechanism is provided with a guide rail, the slider is slidably connected to the guide rail, the bracket can be installed on the slider, and the worm gear is opposite to the middle of the clamping mechanism.

[0011] Furthermore, the sliding block is provided with a groove, an elastic plug-in component is provided in the groove, and a mounting groove is provided in the middle of the bracket, and the elastic plug-in component can be inserted into the mounting groove.

[0012] Furthermore, the elastic plug-in assembly includes a pin and a spring, a stepped hole leading to the groove is provided on the side of the slider, the inner diameter of the middle part of the stepped hole is larger than the inner diameters at both ends, a ring is provided in the middle part of the pin, the ring slides in the middle part of the stepped hole, the ring and the stepped hole are connected by a spring, and one end of the pin can be extended into the groove.

[0013] Furthermore, the clamping mechanism includes a side-opening U-shaped frame, a clamping plate and a cylinder, the cylinder is installed at the upper end of the U-shaped frame, the cylinder rod of the cylinder passes downward through the U-shaped frame and is connected to the clamping plate, and corresponding arc-shaped notches are provided in the middle of the U-shaped frame and the lower end of the clamping plate.

[0014] Furthermore, the arc-shaped notch is provided with anti-slip grooves.

[0015] Compared with the prior art, the advantages of the utility model are: simple structure, easy operation, and high screwing efficiency; by fixing the large bolt and using a pneumatic motor and a worm to drive the worm gear, the large nut can be quickly screwed to the target position on the large bolt, and a single operator can quickly screw nuts of various specifications such as M90 to M54, and a nut can be screwed into place in an average of 15 seconds. Compared with the manual screwing method that takes about 3 minutes, the efficiency is increased by about 12 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model after the reducing ring is removed;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model after the worm gear is removed;

[0020] Figure 4 This is a schematic diagram of the structure of the utility model after the reducer ring;

[0021] Figure 5 This is a diagram of the use state of the utility model after being equipped with a clamping mechanism and a slider;

[0022] Figure 6 This is a schematic diagram of the structure of the slider and the latch of the utility model;

[0023] Figure 7 This is a working principle diagram of the elastic plug assembly of the utility model.

[0024] Among them: 1. pneumatic motor; 2. worm; 3. worm wheel; 301. first inner hexagonal groove; 4. annular cover; 5. reducing ring; 501. second inner hexagonal groove; 502. regular hexagonal ring; 6. bearing; 7. handle; 701. anti-slip ring; 8. bracket; 801. assembly groove; 9. slider; 901. groove; 902. stepped hole; 10. guide rail; 11. U-shaped frame; 1101. anti-slip pattern; 12. cylinder; 13. clamping plate; 1301. arc notch; 14. latch; 15. ring; 16. spring; 17. air pipe. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0026] like Figure 1-7 As shown, a large nut quick screwing device comprises an air motor 1, a worm 2, a worm wheel 3 and an annular cover 4, wherein the worm wheel 3 is rotatably connected in the annular cover 4, the worm 2 is rotatably connected to the side of the annular cover 4, the worm 2 is transmission-connected to the worm wheel 3, a handle 7 is provided on the side of the annular cover 4, the air motor 1 is mounted on the side of the handle 7, one end of the air motor 1 is transmission-connected to one end of the worm 2, a first through inner hexagonal groove 301 is provided in the middle of the worm wheel 3, which can be inserted into the large nut, and the large nut can be quickly screwed to the target position on the large bolt by fixing the large bolt and using the air motor 1 and the worm 2 to drive the worm wheel 3.

[0027] In the above embodiment, a reducing ring 5 can be installed on the worm wheel 3, and the reducing ring 5 and the worm wheel 3 are connected by screws. A second inner hexagonal groove 501 is provided in the middle of the reducing ring 5 to adapt to large nuts of different sizes; a regular hexagonal ring 502 is provided on the reducing ring 5, and the regular hexagonal ring 502 can be installed in the first inner hexagonal groove 301. The size of the regular hexagonal ring 502 corresponds to the size of the first inner hexagonal groove 301, which is convenient for installation and can assist the screws between the reducing ring 5 and the worm wheel 3 to bear force when screwing the large nut; the worm wheel 3 and the annular cover 4, and the worm 2 and the annular cover 4 are all connected by bearings 6, and the rotation is more flexible and smooth; an anti-slip ring 701 is provided on the handle 7, which is stable and safe when held in hand.

[0028] The device also includes a clamping mechanism and a slider 9. A guide rail 10 is provided at one end of the clamping mechanism. The slider 9 is slidably connected to the guide rail 10. The handle 7 is connected to the pneumatic motor 1 through a bracket 8. The bracket 8 can be installed on the slider 9. The worm gear 3 is directly opposite to the middle of the clamping mechanism. The tail end of the large bolt can be fixed in the clamping mechanism. After the worm gear 3 or the reducer ring 5 is inserted into the large nut, the bracket 8 is fixed on the slider 9. The pneumatic motor 1 is started to realize the automatic sliding and screwing of the large nut. The slider 9 is provided with a groove 901, and an elastic plug component is provided in the groove 901. The bracket 8 is provided with an assembly groove 801 in the middle, and the elastic plug component can be inserted into the assembly groove 801, so that the bracket 8 can be quickly disassembled and assembled; the elastic plug component includes a latch 14 and a spring 16. The slider 9 is provided with a stepped hole 902 leading to the groove 901 on the side, and the inner diameter of the middle part of the stepped hole 902 is larger than the inner diameter of the two ends. A ring 15 is provided in the middle of the latch 14, and the ring 15 is in the stepped hole 902. The ring 15 is connected to the stepped hole 902 by a spring 16, one end of the latch 14 can be extended into the groove 901, and when the bracket 8 is installed, the latch 14 only needs to be pulled out of the groove 901, and the bracket 8 is installed. The assembly groove 801 is aligned with the latch 14, and the latch 14 is released to reset it to lock the bracket 8; the clamping mechanism includes a U-shaped frame 11 with a side opening, a clamping plate 13 and a cylinder 12, and the cylinder 12 is installed at the upper end of the U-shaped frame 11, and the cylinder 12 rod of the cylinder 12 passes downward The U-shaped frame 11 is connected to the clamping plate 13. The middle of the U-shaped frame and the lower end of the clamping plate 13 are both provided with corresponding arc-shaped notches 1301. The tail end of the large bolt can be set in the middle of the U-shaped frame, and then the clamping plate 13 is pushed down by the cylinder 12 to clamp the tail end of the large bolt in the corresponding arc-shaped notches 1301 above and below; the arc-shaped notches 1301 are provided with anti-slip grooves 1101, which make the large bolt more stable when clamped, preventing the large bolt from rotating when it is screwed, affecting the safety of screwing.

[0029] Description of the working method of this utility model:

[0030] The device can be hand-held or automatically screwed according to the conditions of the construction site; when the large bolt is large in size and mass and difficult to move, the hand-held screwing method can be used to manually screw the large nut into the large bolt, and then the worm gear 3 or the reducer ring 5 is inserted into the large nut, and then the handle 7 is held and the pneumatic motor 1 is started through the air pipe 17, and the large nut is screwed to the specified position on the large bolt through the worm gear 3 and the worm 2. In this process, the large bolt needs to be manually fixed to prevent it from rotating with the large nut under the friction between the threads; when the large bolt is of moderate size and mass and can be moved, it can be The clamping mechanism and the slider 9 are used to automatically tighten the bolt. The tail end of the large bolt is set in the arc-shaped notch 1301 on the U-shaped frame 11 and clamped by the cylinder 12. The large nut is manually screwed into the large bolt. Then the worm gear 3 or the reducer ring 5 is inserted into the large nut. Then the bracket 8 is installed in the groove 901 and locked by the elastic plug-in assembly. The pneumatic motor 1 can be started, and the large nut is screwed to the specified position on the large bolt through the worm gear 3 and the worm 2. At the same time, the bracket 8 follows the movement direction of the large nut with the cooperation of the slider 9 and the guide rail 10 to achieve automatic tightening. With the assistance of this device and the clamping mechanism and the slider 9, a single operator can quickly screw large nuts of various specifications such as M90 to M54. A large nut can be screwed into place in an average of 15 seconds. Compared with the manual screwing method that takes about 3 minutes, the efficiency is increased by about 12 times.

[0031] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A large nut fast screwing device, comprising a pneumatic motor, a worm, a worm wheel and an annular cover, characterized in that: The worm wheel is rotatably connected in the annular cover, the worm is rotatably connected to the side of the annular cover, the worm is transmission-connected to the worm wheel, a handle is provided on the side of the annular cover, the pneumatic motor is installed on the side of the handle, one end of the pneumatic motor is transmission-connected to one end of the worm, and a first through hexagonal groove is provided in the middle of the worm wheel.

2. The large nut fast screwing device according to claim 1, characterized in that: A reducing ring can be installed on the worm wheel. The reducing ring is connected to the worm wheel via screws, and a second inner hexagonal groove is arranged in the middle of the reducing ring.

3. The large nut fast screwing device according to claim 2, characterized in that: The reducer ring is provided with a regular hexagonal ring, and the regular hexagonal ring can be installed in the first inner hexagonal groove.

4. The large nut fast screwing device according to claim 1, characterized in that: The worm wheel and the annular cover, and the worm and the annular cover are all connected through bearings.

5. The large nut fast screwing device according to claim 1, characterized in that: An anti-slip ring is arranged on the handle.

6. The large nut fast screwing device according to claim 1, characterized in that: It also includes a clamping mechanism and a slider. One end of the clamping mechanism is provided with a guide rail. The slider is slidably connected to the guide rail. The handle is connected to the pneumatic motor through a bracket. The bracket can be installed on the slider. The worm gear is opposite to the middle of the clamping mechanism.

7. The large nut fast screwing device according to claim 6, characterized in that: The sliding block is provided with a groove, in which an elastic plug-in component is arranged, and the middle part of the bracket is provided with an assembly groove, and the elastic plug-in component can be inserted into the assembly groove.

8. The large nut fast screwing device according to claim 6, characterized in that: The clamping mechanism includes a side-opening U-shaped frame, a clamping plate and a cylinder. The cylinder is installed at the upper end of the U-shaped frame. The cylinder rod of the cylinder passes downward through the U-shaped frame and is connected to the clamping plate. Corresponding arc-shaped notches are provided in the middle of the U-shaped frame and the lower end of the clamping plate.

9. The large nut fast screwing device according to claim 7, characterized in that: The elastic plug-in assembly includes a pin and a spring. A stepped hole leading to the groove is provided on the side of the slider. The inner diameter of the middle part of the stepped hole is larger than the inner diameters at both ends. A ring is provided in the middle part of the pin. The ring slides in the middle part of the stepped hole. The ring is connected to the stepped hole by a spring. One end of the pin can extend into the groove.

10. The large nut fast screwing device according to claim 8, characterized in that: The arc-shaped notch is provided with anti-slip grooves.

Images