Bolt tightening gun

Abstract

The utility model provides a bolt tightening gun which comprises a gun body, a driving motor and a gas spring, the gas spring comprises a barrel body and an extension rod, the driving motor drives the barrel body and the extension rod to rotate synchronously, an inserting block is arranged at one end, away from the barrel body, of the extension rod, a hexagon wrench is connected in the inserting block in an inserting mode, and a limiting block is arranged on one side, away from the gas spring, of the inserting block. The limiting block is provided with a U-shaped limiting groove matched with the nut, the limiting block is provided with two sliding rods connected with the gun body in a sliding mode, each sliding rod is provided with two first connecting holes, the lower end of the gun body is provided with a row of second connecting holes matched with the first connecting holes, and plug pins are arranged in the first connecting holes and the second connecting holes in a penetrating mode. According to the bolt loosening and tightening gun, the limiting block is matched with the nut to limit the position of the nut, the gas spring always provides pressing force for the hexagon wrench or the screwdriver, when the driving motor drives the hexagon wrench or the screwdriver to rotate, the bolt can be rapidly mounted or dismounted, the bolt loosening and tightening gun is rapid and convenient to use, and the working intensity of workers is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw guns, in particular to a bolt tightening gun. Background Art

[0002] Pipe connections typically use flanges and bolts, which are then secured with nuts and bolts. When using a traditional wrench to tighten nuts and bolts, whether installing or removing them, the nut becomes stuck in the bolt threads, rotating synchronously with the bolt. This prevents quick installation or removal, requiring operators to use tools in both hands to install and remove the bolts, which is time-consuming, labor-intensive, and inconvenient. Utility Model Content

[0003] The technical problem to be solved by the present invention is: in order to overcome the shortcomings in the prior art that the nut is stuck on the thread of the bolt, the nut rotates synchronously with the bolt, thereby making it impossible to quickly install or remove the bolt, and the operator needs to use tools with both hands to disassemble and install the bolt, which is time-consuming, labor-intensive and very inconvenient. The present invention provides a bolt tensioner.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a bolt tightening gun, comprising a gun body, a driving motor and a gas spring arranged in the gun body, the gas spring comprising a cylinder and an extension rod, the extension rod being slidably connected to the cylinder along the axial direction, the output end of the driving motor drives the cylinder and the extension rod to rotate synchronously along the axis, the extension rod is provided with a plug-in block at one end away from the cylinder, a hexagonal plug-in slot is provided in the plug-in block, a hexagonal wrench or screwdriver is plugged into the plug-in block, a limit block is provided on the side of the plug-in block away from the gas spring, a U-shaped limit slot that cooperates with a nut is provided on the limit block, at least two sliding rods slidably connected to the gun body are provided on the slide rod, and at least two first connecting holes are provided on the slide rod, the lower end of the gun body is provided with a row of second connecting holes that cooperate with the first connecting holes, and a pin is passed through the first connecting hole and the second connecting hole.

[0005] The drive motor is used to drive the gas spring's barrel and extension rod to rotate synchronously, thereby driving the plug-in block and the hexagonal wrench or screwdriver mounted on the plug-in block to rotate synchronously. The gas spring is used to keep the hexagonal wrench or screwdriver pressed against the bolt during tightening. The U-shaped limit groove on the limit block is used to clamp the nut on the main bolt, preventing the nut and bolt from rotating synchronously when the hexagonal wrench or screwdriver is used to tighten the bolt. The hexagonal wrench or screwdriver is plugged into the plug-in block to facilitate replacement of the hexagonal wrench or screwdriver to accommodate bolts of different specifications. The limit block is slidably connected to the gun body via a slide rod. The position of the limit block is fixed by a pin passing through the first and second connecting holes, which is used to adjust the distance between the limit block and the hexagonal wrench or screwdriver.

[0006] Furthermore, to prevent twisting and deformation of the gas spring's extension rod, the plug-in block is equipped with multiple guide rods, and the barrel is provided with multiple first chute slots. The guide rods correspond to the first chute slots in both position and number. The cooperation between the guide rods and the first chute slots prevents torsional forces from being concentrated on the extension rod when the drive motor drives the hexagonal wrench to tighten the bolt, thereby extending the extension rod's service life.

[0007] Furthermore, in order to facilitate adjustment of the distance between the limit block and the hexagonal wrench or screwdriver, a second sliding groove cooperating with the sliding rod is provided on the gun body.

[0008] Furthermore, in order to enable the plug-in block to clamp the hexagonal wrench or screwdriver, a plurality of elastic sheets are provided on the inner wall surface of the plug-in block.

[0009] Furthermore, in order to position the nut when tightening the bolt, a blocking piece that cooperates with the side wall of the nut is provided on the limiting block.

[0010] The beneficial effects of the utility model are as follows: the bolt tightening gun provided by the utility model adopts a limit block to cooperate with the nut to limit the position of the nut, the gas spring always provides a pressing force to the hexagonal wrench or screwdriver, and when the driving motor drives the hexagonal wrench or screwdriver to rotate, the bolt can be quickly installed or removed, which is quick and convenient and reduces the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a structural diagram of the best embodiment of the utility model;

[0013] Figure 2 It is a structural diagram of the limit block.

[0014] In the figure: 1. Gun body, 11. Second connecting hole, 12. Second slide groove, 2. Drive motor, 3. Gas spring, 31. Cylinder, 32. Extension rod, 33. First slide groove, 4. Connecting block, 41. Guide rod, 5. Hexagonal wrench, 6. Limit block, 61. Limit groove, 62. Baffle, 7. Slide rod, 71. First connecting hole, 72. Latch, 8. Bolt, 9. Nut. DETAILED DESCRIPTION

[0015] The present invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0016] like Figure 1-2As shown, a bolt tightening gun of the present invention includes a gun body 1 and a driving motor 2 and a gas spring 3 arranged in the gun body 1. The gas spring 3 includes a cylinder 31 and an extension rod 32. A bearing is provided between the cylinder 31 and the gun body 1. The extension rod 32 is slidably connected to the cylinder 31 along the axial direction. One end of the extension rod 32 arranged in the cylinder 31 is provided with a piston. The output end of the driving motor 2 drives the cylinder 31 and the extension rod 32 to rotate synchronously along the axis. The end of the extension rod 32 away from the cylinder 31 is provided with a plug-in block 4, and a hexagonal plug-in slot is provided in the plug-in block 4. An elastic sheet is provided on the two side walls of the plug-in slot that are opposite to each other. A hexagonal wrench 5 or a screwdriver is plugged into the plug-in block 4, and a limit block 6 is provided on the side of the plug-in block 4 away from the gas spring 3. The limit block 6 is provided with a U-shaped limit groove 61 that cooperates with the nut 9, and the limit block 6 is provided with two slide rods 7 that are slidably connected to the gun body 1. The gun body 1 is provided with a second slide groove 12 that cooperates with the slide rod 7, and the slide rod 7 is provided with two first connecting holes 71. The lower end of the gun body 1 is provided with a row of second connecting holes 11 that cooperate with the first connecting holes 71, and the first connecting holes 71 and the second connecting holes 11 are provided with pins 72.

[0017] Six guide rods 41 are provided on the plug-in block 4 along the circumferential direction, and six first sliding grooves 33 are provided on the cylinder 31 to slide with the guide rods 41 .

[0018] The limiting block 6 is provided with a blocking piece 62 that cooperates with the side wall of the nut 9 .

[0019] Working process:

[0020] When installing or removing the bolt 8, install the appropriate hexagonal wrench 5 or screwdriver in the plug-in slot of the plug-in block 4 according to the specifications of the bolt 8, replace the appropriate limit block 6 according to the specifications of the nut 9, insert the slide rod 7 into the second slide groove 12, and adjust the distance between the limit block 6 and the hexagonal wrench 5 according to the thickness of the flange, and use the pin 72 to pass through the first connecting hole 71 and the second connecting hole 11 to fix the position of the limit block 6.

[0021] The limiting groove 61 of the limiting block 6 is clamped onto the nut 9, and the blocking piece 62 is placed against the side wall of the nut 9 away from the flange. The gas spring 3 presses the hexagonal wrench 5 or screwdriver against the nut of the bolt 8. When the drive motor 2 is started, the limiting block 6 and the nut 9 remain in place. The gas spring 3 always increases the clamping force during the screwing in or out of the bolt 8. When the bolt 8 is completely removed, the operator needs to hold the bolt 8 to prevent the gas spring 3 from bouncing the bolt 8 away.

[0022] Directions and references (e.g., up, down, left, right, etc.) in this disclosure may be used only to assist in describing features in the accompanying drawings. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0023] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A bolt tensioner, characterized by: The invention comprises a gun body (1), a driving motor (2) and a gas spring (3) arranged in the gun body (1), wherein the gas spring (3) comprises a cylinder (31) and an extension rod (32), wherein the extension rod (32) is slidably connected to the cylinder (31) along the axial direction, and the output end of the driving motor (2) drives the cylinder (31) and the extension rod (32) to rotate synchronously along the axis, and a plug-in block (4) is provided at one end of the extension rod (32) away from the cylinder (31), wherein a hexagonal plug-in slot is provided in the plug-in block (4), and a hexagonal wrench (5) is plugged and connected in the plug-in block (4). or screwdriver, a limit block (6) is provided on the side of the plug-in block (4) away from the gas spring (3), a U-shaped limit groove (61) is provided on the limit block (6) and matched with the nut (9), at least two slide bars (7) are provided on the limit block (6) and slidably connected with the gun body (1), at least two first connecting holes (71) are provided on the slide bar (7), a row of second connecting holes (11) matched with the first connecting holes (71) are provided at the lower end of the gun body (1), and a latch (72) is passed through the first connecting hole (71) and the second connecting hole (11).

2. A bolt tensioner according to claim 1, characterized in that: The plug-in block (4) is provided with a plurality of guide rods (41), and the cylinder (31) is provided with a plurality of first sliding grooves (33). The positions and numbers of the guide rods (41) and the first sliding grooves (33) correspond one to one.

3. The bolt tightener according to claim 1, wherein: The gun body (1) is provided with a second sliding groove (12) that cooperates with the sliding rod (7).

4. The bolt tensioner according to claim 1, wherein: A plurality of elastic sheets are provided on the inner wall surface of the plug-in block (4).

5. The bolt tightener according to claim 1, characterized in that: The limiting block (6) is provided with a blocking piece (62) that cooperates with the side wall of the nut (9).

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