Automatic screw tightening device for construction

Abstract

The utility model relates to a tightening device, in particular to an automatic screw tightening device for construction. The device mainly comprises an outer sleeve, an inner tube, a clamping block and an electric drill, during use, a screw is placed in the screw conveying opening and enters the middle of the clamping block along the screw conveying opening, the lower end of the clamping block is tightened inwards to be attached to the lower end of the screw, a nut part of the screw is clamped at the upper end of the clamping block, and the perpendicularity of the screw entering a construction material is guaranteed; and when the electric drill is pressed downwards to tighten the screw, the outer sleeve is driven to slide downwards, the spring is compressed, after the screw is tightened, a constructor unloads force, and the spring drives the electric drill to retract and stretch back to the inner pipe, so that the device is more time-saving and labor-saving, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a tightening device, and more particularly to an automatic tightening device for construction screws. Background Technology

[0002] In building construction, steel structures such as high-rise buildings, bridges, and industrial plants are often connected using screws. Screws are also used to fix concrete pouring formwork and supporting frames. Screws are widely used in building construction. The traditional way to tighten screws is to use tools such as electric screwdrivers and electric drills. This method requires holding the screw by hand when it is screwed into the construction material. Manually holding the screw cannot guarantee the verticality of the screw when it enters the construction material. The tilting of the screw will lead to unstable connection between product parts and may even damage the thread structure of the product parts. Summary of the Invention

[0003] To overcome the problems in the prior art where conventional manual screw-holding cannot guarantee the perpendicularity of the screw when it enters the construction material, and where screw tilting leads to stress concentration distortion, accelerates the plastic deformation of the thread, and causes the screw's self-locking function to fail, this utility model provides an automatic screw-tightening device for construction. This device uses a motor in conjunction with a screwdriver bit to tighten the screw, and the installation can be completed without manually holding the screw.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] An automatic screw tightening device for construction includes an outer tube 1, an inner tube 2, a clamping block 3, and an electric drill 4.

[0006] One end of the outer tube 1 is slidably mounted with the inner tube 2. The inner tube 2 has a screw feed port 21 on its side. The other end of the outer tube 1 is fixedly mounted on the chuck of the electric drill 4. The drill bit of the electric drill 4 passes through the outer tube 1 and extends to the inner tube 2. The free end of the inner tube 2 is evenly spaced around its circumference with three clamping blocks 3 made of spring steel. The lower end of the clamping blocks 3 is tightened inward, thereby forming a funnel-shaped structure inside.

[0007] Furthermore, the screw delivery port 21 is inclined, with an inclination angle of 30 to 60 degrees.

[0008] Furthermore, the inner wall of the outer tube 1 is provided with an inwardly protruding step 11, and a spring 12 is provided between the step 11 and the upper end of the inner tube 2.

[0009] Furthermore, the outer wall of the inner tube 2 is provided with a semi-circular groove, in which a ball bearing 22 is rolled and installed, and the ball bearing 22 is evenly spaced around the circumference of the inner tube 2; the inner wall of the outer tube 1 is provided with a sliding groove 13 corresponding to the ball bearing 22, the sliding groove 13 is arranged along the length of the outer tube 1, and the lower end does not penetrate the outer tube 1.

[0010] The beneficial effects of this utility model are:

[0011] In use, the screw is placed into the screw feed port and enters the middle of the clamping block along the screw feed port. The screw shank is in contact with the lower end of the clamping block, and the screw cap is stuck on the upper end of the clamping block, so that the screw remains vertical when tightened. This ensures the verticality of the screw when entering the construction material and reduces the problem that screw tilting can cause unstable connection between product parts or even damage the thread structure of the product parts.

[0012] This utility model also has the following beneficial effects:

[0013] When the electric drill is pressed down to tighten the screw, the outer tube slides downward, the spring is compressed, and after the screw is tightened, the worker releases the force, and the spring causes the electric drill to retract and extend back into the inner tube, making the device more time-saving and labor-saving, and improving work efficiency. Attached Figure Description

[0014] Figure 1 This is a first-person perspective three-dimensional schematic diagram of this utility model.

[0015] Figure 2 This is a frontal sectional view of the present invention.

[0016] Figure label:

[0017] 1-Outer tube, 11-Step, 12-Spring, 13-Slide groove, 2-Inner tube, 21-Screw delivery port, 22-Ball bearing, 3-Clamping block, 4-Electric drill, 5-Screw. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0019] This utility model discloses an automatic screw tightening device for construction, such as... Figure 1-2 As shown, the automatic screw tightening device for construction includes an outer tube 1, an inner tube 2, a clamping block 3, and an electric drill 4.

[0020] One end of the outer tube 1 is slidably mounted with the inner tube 2. The inner tube 2 has a screw feed port 21 on its side. The other end of the outer tube 1 is fixedly mounted on the chuck of the electric drill 4. The drill bit of the electric drill 4 passes through the outer tube 1 and extends to the inner tube 2. The free end of the inner tube 2 is evenly spaced around its circumference with three clamping blocks 3 made of spring steel. The lower end of the clamping blocks 3 is tightened inward, thereby forming a funnel-shaped structure inside.

[0021] In use, screw 5 is inserted into the inner cavity of inner tube 2 through screw delivery port 21 until it enters the middle of clamping block 3. The end cap of screw 5 is stuck at the lower end of inner tube 2, and the screw section of screw 5 is in contact with the lower end of clamping block 3, thereby fixing the position of screw 5 and keeping screw 5 perpendicular to the construction material. This replaces the traditional process of manually holding the screw and then tightening it with a screwdriver, making the device more convenient to use. It ensures that screw 5 enters the construction material vertically when tightening. The construction worker holds the handle of electric drill 4 with one hand and the inner tube 2 with the other, pressing the bit of electric drill 4 towards screw 5 until the bit of electric drill 4 connects with the end cap of screw 5. Then the electric drill is started, and the bit of electric drill 4 rotates, causing screw 5 to rotate and enter the construction material.

[0022] The clamping block 3 of the device fixes the screw 5, ensuring the perpendicularity of the screw 5 when it enters the construction material. This reduces the problem of unstable connection between product parts caused by the tilting of the screw 5, and even damage to the thread structure of the product parts. When the bit of the electric drill 4 drives the screw 5 to rotate and enter the construction material, the end cap of the screw opens the clamping block 3 outward. After the screw 5 is tightened, the bit of the electric drill 4 retracts into the inner tube 2. Since the clamping block 3 is made of spring steel, which has a high elastic limit, it can withstand repeated clamping deformation without plastic deformation. The clamping block 3 retracts inward to restore its original shape.

[0023] The screw feed port 21 is inclined at an angle of 30 to 60 degrees. This inclined design allows the screw 5 to enter the inner tube 2 more easily.

[0024] The inner wall of the outer tube 1 is provided with an inwardly protruding step 11, and a spring 12 is provided between the step 11 and the upper end of the inner tube 2.

[0025] When in use, when the electric drill 4 is pressed down to tighten the screw 5, the outer tube 1 slides downward, and the spring 12 is compressed. After tightening the screw 5, the construction worker releases the force, and the spring 12 drives the electric drill 4 to retract and extend back into the inner tube 2, making the device more time-saving and labor-saving, and improving work efficiency.

[0026] The outer wall of the inner tube 2 is provided with a semi-circular groove, in which a ball bearing 22 is rolled and installed, and the ball bearing 22 is evenly spaced around the circumference of the inner tube 2; the inner wall of the outer tube 1 is provided with a sliding groove 13 corresponding to the ball bearing 22, the sliding groove 13 is arranged along the length of the outer tube 1, and the lower end does not penetrate the outer tube 1.

[0027] When the electric drill 4 is pressed down to tighten the screw 5, the outer tube 1 slides down along the sliding sleeve 22, causing the ball bearings 22 on the sliding sleeve 22 to roll along the groove 13 on the inner wall of the outer tube 1. The function of the ball bearings 22 is to convert sliding friction into rolling friction, reduce motion resistance, and facilitate the sliding of the inner tube 2 and the outer tube 1.

[0028] How to use this utility model:

[0029] When in use, screw 5 is placed into screw feed port 21. Screw 5 enters the inner tube 2 from screw feed port 21 until it enters the middle of clamping block 3. The end cap of screw 5 is stuck at the lower end of inner tube 2, and the screw section of screw 5 is in contact with the lower end of clamping block 3, thereby fixing the position of screw 5 and keeping screw 5 in a vertical state. This ensures that screw 5 enters the construction material vertically when tightening. The construction worker holds the handle of electric drill 4 with one hand and the inner tube 2 with the other hand, pressing the bit of electric drill 4 towards screw 5, causing the outer tube 1 to slide down along the sliding sleeve 22. Spring 12 is compressed until the bit of electric drill 4 connects with the end cap of screw 5. Then electric drill 4 is started. The rotation of the bit of electric drill 4 causes screw 5 to rotate and enter the construction material. After screw 5 is tightened, electric drill 4 is turned off, the construction worker releases the force, and spring 12 causes electric drill 4 to retract and extend back into inner tube 2.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. An automatic screw tightening device for construction, characterized in that: Includes outer tube (1), inner tube (2), clamping block (3), and electric drill (4); One end of the outer tube (1) is slidably mounted with an inner tube (2), and a screw delivery port (21) is provided on the side of the inner tube (2). The other end of the outer tube (1) is fixedly mounted on the chuck of the electric drill (4), and the bit of the electric drill (4) extends to the inner tube (2) after passing through the outer tube (1). The free end of the inner tube (2) is evenly spaced around its circumference with clamping blocks (3) made of three spring steel pieces, and the lower end of the clamping blocks (3) is tightened inward, thereby forming a funnel-shaped structure inside.

2. The automatic screw tightening device for construction as described in claim 1, characterized in that: The screw delivery port (21) is inclined at an angle of 30 to 60 degrees.

3. The automatic screw tightening device for construction as described in claim 1, characterized in that: The inner wall of the outer tube (1) is provided with an inwardly protruding step (11), and a spring (12) is provided between the step (11) and the upper end of the inner tube (2).

4. The automatic screw tightening device for construction as described in claim 3, characterized in that: The outer wall of the inner tube (2) is provided with a semi-circular groove, in which a ball bearing (22) is rolled and installed, and the ball bearing (22) is evenly spaced around the circumference of the inner tube (2); the inner wall of the outer tube (1) is provided with a sliding groove (13) corresponding to the ball bearing (22), the sliding groove (13) is arranged along the length of the outer tube (1), and the lower end does not penetrate the outer tube (1).

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