Automatic pre-tightening machine for rotary supporting bolt

Abstract

The utility model discloses an automatic pre-tightening machine for a rotary supporting bolt, relates to the technical field of pre-tightening machines, and aims to solve the problems that in the prior art, two persons are needed for cooperative operation, the construction labor cost is high, and the bolt pre-tightening construction efficiency is low. The driving mechanism comprises a base, a protective shell fixed to the top of the base, a driving rod rotationally connected to the top of the base, and a connecting disc fixed to the top of the driving rod. The hexagonal head of the bolt is sleeved with the connecting shell, the second servo motor drives the threaded rod to drive the movable blocks to abut against the hexagonal head side plate of the bolt, the three equilateral hexagonal movable blocks are just attached to the three edges of the hexagonal head of the bolt, and after the movable blocks and the bolt are attached and fastened, the hexagonal head of the bolt can be fixed. The first servo motor drives the driving rod to rotate through the gear and the gear ring which are meshed with each other, the rotating driving rod drives the adjusting mechanism to rotate through the connecting disc, and the bolt is screwed and pre-tightened.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-tightening machines, in particular to an automatic pre-tightening machine for slewing support bolts. Background Art

[0002] In recent years, pipeline construction and installation have developed towards large diameter, thick wall and high pressure bearing, with the characteristics of large construction volume, short construction period, high quality requirements and complicated procedures. Among them, bolt connection is an important means of pipeline installation.

[0003] There will be a lot of bolt pre-tightening work in the early stage of pipeline installation. For the pre-tightening of larger bolt connections, a larger tightening force and torque are required to meet the requirements. Usually two people cooperate to use a hammer and a hammer wrench to operate. One person uses his hand to help keep the hammer wrench stable and constantly adjust the direction of the hammer wrench, and the other person uses a hammer to hit the hammer wrench to achieve pre-tightening of larger bolts.

[0004] This bolt pre-tightening method has a high safety risk in operation and requires two people to operate it together. The construction labor cost is high. In addition, in order to ensure that the hammer head is perpendicular to the wrench to provide maximum torque, the wrench must be adjusted to keep it horizontal every time the hammer hits the wrench, which affects the bolt pre-tightening construction efficiency. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides an automatic pre-tightening machine for slewing support bolts, which overcomes the deficiencies of the prior art and effectively solves the problems in the prior art of requiring two people to cooperate in operation, high construction labor costs, and low bolt pre-tightening construction efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A rotary support bolt automatic pre-tightening machine includes a driving mechanism and an adjusting mechanism, wherein the driving mechanism includes a base, a protective shell fixed to the top of the base, a driving rod rotatably connected to the top of the base, a connecting plate fixed to the top of the driving rod and a first servo motor installed on one side of the top of the base, the adjusting mechanism includes a connecting shell and an adjusting component equidistantly distributed on the annular outer wall of the connecting shell, and the adjusting component includes a screw, a second servo motor connected to one end of the screw and a movable block rotatably connected to the other end of the screw.

[0008] By inserting the hexagonal head of the bolt into the connecting shell, the second servo motor drives the movable block to abut against the hexagonal head side plate of the bolt through the screw rod, and the three equilateral hexagonal movable blocks just fit with the three sides of the hexagonal head of the bolt. After the movable plate is fitted and tightened with the bolt, the first servo motor drives the driving rod to rotate through the mutually meshing gears and gear rings, and the rotating driving rod drives the adjusting mechanism to rotate through the connecting plate, so as to pre-tighten the bolt.

[0009] Preferably, the top of the connection plate and the bottom of the connection shell are both provided with mounting holes distributed at equal distances, and the connection plate and the connection shell are fixed by bolts.

[0010] The driving mechanism and the adjusting mechanism are connected and fixed via a connecting disk.

[0011] Preferably, a toothed ring is sleeved and fixed on the rod wall of the driving rod, and a gear meshing with the toothed ring is sleeved and fixed on the output shaft of the first servo motor.

[0012] The first servo motor drives the driving rod to rotate through the gears and gear rings that mesh with each other.

[0013] Preferably, the number of the adjustment components is three, and the positions of the three adjustment components form an equilateral triangle.

[0014] The three movable blocks in the shape of equilateral hexagons fit exactly with the three sides of the hexagonal head of the bolt.

[0015] Preferably, a connecting block is connected to the back of the second servo motor, and guide sliding rods are fixed to both ends of an outer wall on one side of the connecting block.

[0016] When the second servo motor drives the screw rod to rotate, the connecting block and the guide slide bar cooperate to enable the second servo motor to move along with the screw rod.

[0017] Preferably, the other end of the guide slide rod is connected and fixed to the movable block, and a slide hole matched with the guide slide rod is provided on the annular outer wall of the connecting shell.

[0018] The guide slide bar which is slidably connected with the connection shell enables the screw rod to move spirally in the connection shell, thereby driving the movable block to abut against the hexagonal head side plate of the bolt.

[0019] The beneficial effects of the utility model are:

[0020] The hexagonal head of the bolt is inserted into the connecting shell, and the second servo motor drives the movable block to abut against the hexagonal head side plate of the bolt through the screw rod. The three equilateral hexagonal movable blocks just fit with the three sides of the hexagonal head of the bolt. After the movable plate is fitted and tightened with the bolt, the first servo motor drives the driving rod to rotate through the mutually meshing gears and gear rings. The rotating driving rod drives the adjusting mechanism to rotate through the connecting plate to twist and pre-tighten the bolt, which effectively solves the problems of the prior art that two people need to cooperate in operation, the high construction labor cost, and the low efficiency of bolt pre-tightening construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a rotary support bolt automatic pre-tightening machine proposed by the utility model;

[0022] Figure 2This is a schematic diagram of the driving mechanism structure of a rotary support bolt automatic pre-tightening machine proposed by the utility model;

[0023] Figure 3 The utility model is a schematic diagram of the structure of an adjustment mechanism of a rotary support bolt automatic pre-tightening machine.

[0024] In the figure: 1. driving mechanism; 2. adjusting mechanism; 3. base; 4. protective shell; 5. driving rod; 6. connecting plate; 7. first servo motor; 8. gear ring; 9. connecting shell; 10. adjusting assembly; 11. screw rod; 12. second servo motor; 13. movable block; 14. connecting block; 15. guide slide rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example:

[0027] Reference Figure 1-3 , an automatic pre-tightening machine for slewing support bolts, comprising a driving mechanism 1 and an adjusting mechanism 2, wherein the driving mechanism 1 comprises a base 3, a protective shell 4 fixed to the top of the base 3, a driving rod 5 rotatably connected to the top of the base 3, a connecting plate 6 fixed to the top of the driving rod 5, and a first servo motor 7 installed on one side of the top of the base 3;

[0028] The adjusting mechanism 2 includes a connecting shell 9 and adjusting components 10 equidistantly distributed on the annular outer wall of the connecting shell 9, and the adjusting component 10 includes a screw 11, a second servo motor 12 connected to one end of the screw 11, and a movable block 13 rotatably connected to the other end of the screw 11;

[0029] The top of the connecting plate 6 and the bottom of the connecting shell 9 are both provided with mounting holes distributed at equal distances. The connecting plate 6 and the connecting shell 9 are connected and fixed by bolts. The driving mechanism 1 and the adjusting mechanism 2 are connected and fixed by the connecting plate 6. The rod wall of the driving rod 5 is sleeved and fixed with a gear ring 8. The output shaft of the first servo motor 7 is sleeved and fixed with a gear meshing with the gear ring 8. The first servo motor 7 drives the driving rod 5 to rotate through the meshing gears and the gear ring 8.

[0030] There are three adjusting components 10, and the positions of the three adjusting components 10 form an equilateral triangle. The three equilateral hexagonal movable blocks 13 just fit the three sides of the hexagonal head of the bolt. The back of the second servo motor 12 is connected to a connecting block 14, and both ends of the outer wall of one side of the connecting block 14 are fixed with guide slide bars 15. When the second servo motor 12 drives the screw 11 to rotate, the connecting block 14 and the guide slide bar 15 cooperate to enable the second servo motor 12 to move with the screw 11. The other end of the guide slide bar 15 is connected and fixed to the movable block 13. The annular outer wall of the connecting shell 9 is provided with a sliding hole adapted to the guide slide bar 15. The guide slide bar 15 slidably connected to the connecting shell 9 enables the screw 11 to move spirally in the connecting shell 9, thereby driving the movable block 13 to abut against the hexagonal head side plate of the bolt.

[0031] Working principle:

[0032] During operation, the hexagonal head of the bolt is inserted into the connecting shell 9, and the second servo motor 12 drives the screw 11 to rotate, and cooperates with the guide slide bar 15 slidably connected to the connecting shell 9 to make the screw 11 spirally move in the connecting shell 9, thereby driving the movable block 13 to abut against the hexagonal head side plate of the bolt. The three equilateral hexagonal movable blocks 13 are just in contact with the three sides of the hexagonal head of the bolt. After the movable plate 13 is in contact with the bolt and tightened, the first servo motor 7 drives the drive rod 5 to rotate through the mutually meshing gears and gear rings 8. The rotating drive rod 5 drives the adjustment mechanism 2 to rotate through the connecting plate 6 to pre-tighten the bolt.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A slewing support bolt automatic pre-tightening machine, comprising a driving mechanism (1) and an adjusting mechanism (2), characterized in that: The driving mechanism (1) comprises a base (3), a protective shell (4) fixed to the top of the base (3), a driving rod (5) rotatably connected to the top of the base (3), a connecting plate (6) fixed to the top of the driving rod (5), and a first servo motor (7) installed on one side of the top of the base (3); the adjusting mechanism (2) comprises a connecting shell (9) and an adjusting assembly (10) equidistantly distributed on the annular outer wall of the connecting shell (9); the adjusting assembly (10) comprises a screw (11), a second servo motor (12) connected to one end of the screw (11), and a movable block (13) rotatably connected to the other end of the screw (11).

2. The automatic pre-tightening machine for slewing support bolts according to claim 1, characterized in that: The top of the connection plate (6) and the bottom of the connection shell (9) are both provided with mounting holes distributed at equal distances, and the connection plate (6) and the connection shell (9) are fixed by bolt connection.

3. The automatic pre-tightening machine for slewing support bolts according to claim 1, characterized in that: A toothed ring (8) is sleeved and fixed on the rod wall of the driving rod (5), and a gear meshing with the toothed ring (8) is sleeved and fixed on the output shaft of the first servo motor (7).

4. The automatic pre-tightening machine for slewing support bolts according to claim 1, characterized in that: The number of the adjustment components (10) is three, and the positions of the three adjustment components (10) form an equilateral triangle.

5. The automatic pre-tightening machine for slewing support bolts according to claim 1, characterized in that: The back of the second servo motor (12) is connected to a connecting block (14), and guide slide bars (15) are fixed to both ends of an outer wall of one side of the connecting block (14).

6. The automatic pre-tightening machine for slewing support bolts according to claim 5, characterized in that: The other end of the guide slide rod (15) is connected and fixed to the movable block (13), and a slide hole matching the guide slide rod (15) is provided on the annular outer wall of the connecting shell (9).

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