CN104084923B - A kind of sleeve electric wrench connected for screw thread steel - Google Patents

Abstract

The utility model relates to a socket electric wrench used for steel bar thread connection, which belongs to the technical field of steel bar mechanical connection tools, and is used for improving the quality of steel bar connection, reducing joint cost, and accelerating construction speed. The invention consists of two sets of left and right rotary wrenches and an idler wheel. A battery, a DC motor, a gear transmission, a torque regulating device, a drive shaft and a sleeve drive wheel are respectively installed in the left and right rotary wrenches. The torque adjusting device of the present invention sets the tightening torque of the sleeve, and the battery and the DC motor output the tightening torque through the gear transmission device, and the tightening torque is transmitted to the left and right sleeve drive wheels, and the sleeve drive wheels drive the sleeve to rotate in a directional manner, thereby achieving the screw connection. Purpose. The invention has the advantages of reasonable layout, small and convenient mechanism, adjustable tightening torque, safe and reliable operation, and reduced labor intensity of operators, etc., can improve the quality of steel bar connection, reduce joint cost, speed up construction, improve work efficiency, and has a broad market prospect.

Description

A socket electric wrench for steel bar thread connection

technical field

The invention relates to a sleeve electric connecting tool for mechanically connecting steel bars in the construction industry, and belongs to the technical field of mechanically connecting tools for steel bars.

Background technique

Rebar mechanical connection is a thick steel bar connection method that has been popularized and applied in recent years. The connection of steel bars is realized through the sleeves that are connected between two steel bars. The connection of steel bars can be realized through the form of extrusion deformation, wedging between threads, etc. The main ways of mechanical connection are radial and axial cold extrusion connection, taper thread connection, upsetting straight thread connection, rolling straight thread connection and other forms. Rebar connection is one of the key processes in the construction of reinforced concrete structures, which directly affects the quality of engineering structures and work efficiency. The correct selection of steel bar connection tools will help improve the quality of steel bar connections, reduce joint costs, and speed up construction.

In the current on-site mechanical connection of steel bars, workers use ordinary wrenches to tighten the sleeve until it is fastened to complete the butt joint of steel bars. Therefore, the stability of steel bar connection quality is greatly affected by human factors. Most of the damage to threaded joints occurs at the joints. The quality of threads processed on site, missing or insufficient tightening torque, and loose threads have a great impact on the strength and deformation of the joints. It is not very convenient, so the quality of joints may be reduced due to the influence of human factors or lax management. In order to ensure the on-site connection quality of sleeve threaded joints, it is necessary to develop special tools suitable for steel sleeve connection.

Contents of the invention

The technical problem to be solved by the present invention is to provide a socket electric wrench for steel bar thread connection, which can improve the quality of steel bar connection, reduce joint cost and speed up construction.

The technical scheme that solves the above-mentioned technical problem is:

A socket electric wrench for steel bar thread connection, which consists of two sets of left and right rotary wrenches and idler wheels, and the left and right rotary wrenches respectively include batteries, DC motors, gear transmissions, drive shafts, socket drive wheels and left clamping The handle, the right clamping handle, the left shell, the right shell, the front ends of the left clamping handle and the right clamping handle are respectively connected with the left shell and the right shell, and the middle of the left clamping handle and the right clamping handle overlap And run through the idler shaft, the idler shaft is set with the idler, the battery, the DC motor, the gear transmission device, the drive shaft and the sleeve drive wheel are respectively installed in the left housing and the right housing, the battery is connected with the DC motor, and the motor shaft of the DC motor It is connected with the gear transmission device, and the gear transmission device is connected with the drive shaft. The drive shaft drives the sleeve drive wheel to rotate. The circumference plane of the left and right sleeve drive wheels is on the same plane as the circumference plane of the idler wheel. The sleeve is placed on the The area between the left and right socket drive wheels and the idler wheel.

The above-mentioned sleeve electric wrench for threaded connection of steel bars, the gear transmission device is composed of a central gear, a planetary carrier, a planetary wheel, and an outer ring gear. The three planetary wheels are meshed with each other, the three planetary wheels are connected by the planet carrier, the three planetary wheels are meshed with the outer ring gear, and the outer ring gear is connected with the drive shaft through the torque adjustment device.

The above socket electric wrench used for steel bar thread connection, the torque adjustment device is composed of a speed regulating outer shell, a speed regulating inner shell, a pressure spring, a speed regulating sleeve and a ball, the inner wall of the speed regulating outer shell and the speed regulating inner shell The outer wall of the speed regulation is threaded, the speed regulating inner casing is set on the drive shaft by the bearing, the compression spring is set on the outer periphery of the speed regulating inner casing, the upper end of the compression spring is fixedly connected with the speed regulating inner casing, and the lower end of the compression spring is connected to the speed regulating The sleeve, the inner cavity of the speed regulating sleeve is connected with the drive shaft, and the lower end of the speed regulating sleeve is pressed against the upper end surface of the outer ring gear by balls.

For the socket electric wrench used for threaded connection of steel bars, there are manual buttons on the left clamping handle and the right clamping handle respectively. The manual buttons include a screw-in button, a screw-out button, and a stop button. The manual buttons are connected to the DC motor .

The above-mentioned socket electric wrench used for threaded connection of steel bars also has a position locking device. The position locking device is composed of a ratchet, a pawl and a compression spring. The pawl is installed on the right clamping handle through a cylindrical pin, and the ratchet is installed on the On the idler shaft, the front end of the ratchet is engaged with the ratchet, and the clip spring is pressed on the ratchet.

The beneficial effects of the present invention are:

The present invention utilizes the torque adjusting device to set the tightening torque of the socket, the battery and the DC motor output the tightening torque through the gear transmission device, and the tightening torque is transmitted to the socket driving wheels of the left and right two sets of rotary wrenches, and the socket driving wheel drives the socket to rotate directionally, So as to achieve the purpose of threaded connection. The invention provides a suitable electric tool for the technical field of thick steel bar sleeve screw connection, and has the advantages of reasonable layout, compact and convenient mechanism, adjustable tightening torque, safe and reliable operation and the like. The invention can not only greatly reduce the labor intensity of operators, but more importantly, it can improve the quality of steel bar connection, reduce the joint cost, speed up the construction speed, and improve work efficiency. It is an upgraded product of the existing steel bar connection tool and has broad market prospects. .

Description of drawings

Fig. 1 is a structural representation of the present invention;

FIG. 2 is a top view of FIG. 1 .

The markings in the figure are as follows: right clamping handle 1, pawl 2, left clamping handle 3, idler wheel 4, sleeve 5, sleeve drive wheel 6, battery 7, left housing 8, speed regulating housing 9, idler Axle 10, drive shaft 11, speed regulating inner casing 12, compression spring 13, ball 14, central gear 18, planetary gear 16, planet carrier 17, outer ring gear 15, speed regulating inner casing cover 19, DC motor 20, right Housing 21, cylindrical pin 22, ratchet 23, speed regulating sleeve 24.

Detailed ways

The present invention is composed of two sets of left and right rotary wrenches and an idler wheel 4. A sleeve 5 is placed between the left and right sets of rotary wrenches and the idler wheel 4. The left and right sets of rotary wrenches rotate at the same time to drive the sleeve 5 to rotate in a directional manner, thereby achieving threaded connection. the goal of.

The left and right rotary wrenches respectively include a left clamping handle 3, a right clamping handle 1, a left housing 8, a right housing 21, a power unit, a gear transmission, a torque adjusting device, a sleeve driving device, and a position locking device.

As shown in the figure, the front ends of the left clamping handle 3 and the right clamping handle 1 are respectively connected with the left housing 8 and the right housing 21, and the middles of the left clamping handle 3 and the right clamping handle 1 overlap and pass through the idler shaft 10 , idler gear 4 is set on the idler shaft 10, power unit, gear transmission, torque adjustment device, sleeve driving device are respectively installed in the left housing 8 and the right housing 21. The power device, the gear transmission device, the torque adjusting device, and the socket driving device are connected in sequence, and the tightening torque is transmitted to the socket driving devices of the left and right two sets of rotary wrenches. Purpose

Shown in the figure, power unit is made up of battery 7 and DC motor 20, and battery 7 selects lithium ion battery for use, and the rated voltage of DC motor 20 is 24v.

Shown in the figure, gear transmission device is made up of central gear 18, planet carrier 17, planetary gear 16, outer ring gear 15. The central gear 18 is keyed to the motor shaft of the DC motor 20, the circumference of the central gear 18 meshes with three planetary gears 16, the three planetary gears 16 are connected by the planet carrier 17, and the three planetary gears 16 mesh with the outer ring gear 15, The outer ring gear 15 transmits torque to the sleeve drive through the torque adjustment device.

As shown in the figure, the sleeve drive device is composed of a drive shaft 11 and a sleeve drive wheel 6. The lower end of the drive shaft 11 is connected with the torque adjustment device, and the upper end of the drive shaft 11 is connected with the sleeve drive wheel 6. The left and right sleeves The circumferential plane of the cylinder driving wheel 6 is on the same plane as the circumferential plane of the idler 4, and the sleeve 5 is placed in the area between the left and right sleeve driving wheels 6 and the idler 4. The rotation of the sleeve driving wheel 6 drives the sleeve 5 to screw in, providing radial friction and axial force until screwing.

As shown in the figure, the torque adjusting device is composed of a speed regulating outer casing 9, a speed regulating inner casing 12, a compression spring 13, a ball 14 and a speed regulating sleeve 24. The inner wall of the speed regulating outer casing 9 is threadedly connected to the outer wall of the speed regulating inner casing 12. The speed regulating inner casing 12 is sleeved on the drive shaft 11 by a bearing, and the compression spring 13 is set on the outer periphery of the speed regulating inner casing 12. The upper end of 13 is fixedly connected with the speed regulating inner housing 12, the lower end of the compression spring 13 is connected with the speed regulating sleeve 24, the inner cavity of the speed regulating sleeve 24 is connected with the drive shaft 11, and the lower end of the speed regulating sleeve 24 is pressed tightly by the ball 14 On the outer ring gear 15 upper end face. Because stage clip 13 compresses the upper end surface of speed regulating sleeve 24 and ball 14 and outer ring gear 15, when outer ring gear 15 rotates, rely on the upper end surface of outer ring gear 15 and ball 14, speed regulating sleeve 24 Friction drives the speed regulating sleeve 24 to rotate, and the speed regulating sleeve 24 drives the sleeve driving device to rotate.

When working, turn the thread between the speed regulating outer casing 9 and the speed regulating inner casing 12 to adjust the pressing force of the compression spring 13. The outer ring gear 15 has different rotating speeds under different pressing forces, thereby realizing the torque adjustment. Function. When the sleeve 5 is tightened and exceeds the limit torque, the sleeve drive wheel 6 and the drive shaft 11 stop rotating, and the friction between the ball 14 and the outer ring gear 15 presses the outer ring gear 15, causing the outer ring gear 15 to stop Rotate, the planetary system of sun gear 18, planetary gear 16 idles, and plays the effect of overload protection to DC motor 20.

The figure shows that the position locking device is composed of a ratchet 23, a pawl 2, and a pressure spring. The pawl 2 is installed on the right clamping handle 1 through a cylindrical pin 22, and the ratchet 23 is installed on the idler shaft 10. The front end is engaged with the ratchet 23, and the stage clip is pressed on the ratchet 2. After the operator clamps the sleeve 5 by holding the right clamping handle 1, the locking device locks the current clamping state, and the operator can relax and hold the right clamping handle 1.

As shown in the figure, there are manual buttons on the left clamping handle 3 and the right clamping handle 1 respectively. The manual buttons include a screw-in button, a screw-out button, and a stop button. The screw-in button and the screw-out button control the tightening and loosening of the sleeve 5 respectively, and the stop button controls the stop operation of the equipment.

Working process of the present invention is as follows:

Utilize the ratchet 23 of the position locking device, the ratchet 2 to adjust the center distance between the two sleeve drive wheels 6 and the idler 4, to adapt to the sleeve 5 outer diameters of different specifications screwed in. Rotate the speed regulating housing 9 of the torque adjusting device to adjust the compression force of the stage clip 13, and set the torque value required for tightening the connecting sleeve 5 used. Place the connecting sleeve 5, the inner thread of the connecting sleeve 5 cooperates with the outer thread of the head of the steel bar, and manually screw in 2-3 turns. Press the left clamping handle 3 and the right clamping handle 1, so that the sleeve drive wheel 6 is opened, and the lower part of the sleeve 5 is clamped. At the same time, the pawl 2 in the position locking device is engaged with the ratchet 23, and the current clamp is automatically locked. tight position. Start the screw-in button 1 on the right clamping handle, the DC motor 20 forwardly rotates to drive the gear transmission to rotate, and the drive shaft 11 transmits the torque to the sleeve drive 6 . The two sleeves drive 6 to rotate in the same direction, and the connecting sleeve 5 is screwed in under the action of friction. When the sleeve 5 is screwed into place, the sleeve 5 stops moving, the sleeve drive 6 stops rotating, the friction between the ball 14 and the outer ring gear 15 rises sharply, and the outer ring gear 15 is pressed, causing the outer ring gear 15 to stop Rotate, the planetary system of sun gear 18, planetary gear 16 idles, and plays the effect of overload protection to DC motor 20. Press the stop button of the right clamping handle 1, when the swing lever of the position locking device is pressed down, the ratchet 2 is lifted, disengages from the ratchet 23, and presses the left clamping handle 3 and the right clamping handle 1, so that Sleeve drive wheel 6 opens, and finishes work process.

Claims (5)

1. the sleeve electric wrench connected for screw thread steel, it is characterized in that: it overlaps rotary spanner by left and right two and idle pulley (4) forms, left rotation and right rotation spanner comprises battery (7) respectively, dc motor (20), gear drive, torque adjusting device, driving shaft (11), sleeve driving wheel (6) and left holding handle (3), right holding handle (1), left shell (8), right shell body (21), the front end of left holding handle (3) and right holding handle (1) respectively with left shell (8), right shell body (21) is connected, overlapping and run through idler shaft (10) in the middle of left holding handle (3) and right holding handle (1), idler shaft (10) is set with idle pulley (4), in left shell (8) and right shell body (21), battery (7) is installed respectively, dc motor (20), gear drive, driving shaft (11) and sleeve driving wheel (6), battery (7) is connected with dc motor (20), the motor shaft of dc motor (20) is connected with gear drive, gear drive is connected with driving shaft (11), driving shaft (11) band moving sleeve driving wheel (6) rotates, the circumferential plane of two the sleeve driving wheels (6) in left and right and the circumferential plane of idle pulley (4) are at grade, sleeve (5) is placed in the region between left and right sleeve driving wheel (6) and idle pulley (4).

2. the sleeve electric wrench connected for screw thread steel according to claim 1, it is characterized in that: described gear drive is by central gear (18), planet carrier (17), planetary gear (16), outer ring gear (15) forms, central gear (18) is connected with the motor axle key of dc motor (20), central gear (18) circumference is meshed with 3 planetary gears (16), 3 planetary gears (16) are connected by planet carrier (17), 3 planetary gears (16) are meshed with outer ring gear (15), outer ring gear (15) is connected with driving shaft (11) by torque adjusting device.

3. the sleeve electric wrench connected for screw thread steel according to claim 2, it is characterized in that: torque adjusting device is by speed governing shell body (9), speed governing Inner housing (12), stage clip (13), speed governing sleeve (24) and ball (14) composition, the inwall of speed governing shell body (9) is threaded with the outer wall of speed governing inner housing (12), speed governing inner housing (12) is contained on driving shaft (11) by bearing holder (housing, cover), stage clip (13) is enclosed within speed governing inner housing (12) periphery, the upper end of stage clip (13) is fixedly connected with speed governing inner housing (12), the lower end of stage clip (13) connects speed governing sleeve (24), speed governing sleeve (24) inner chamber is connected with driving shaft (11), speed governing sleeve (24) lower end is pressed on outer ring gear (15) upper surface by ball (14).

4. the sleeve electric wrench connected for screw thread steel according to claim 3, it is characterized in that: (1) has hand push button respectively for described left holding handle (3), right holding handle, hand push button comprises precession button, screws out button, stop button, and hand push button is connected with dc motor (20).

5. the sleeve electric wrench connected for screw thread steel according to claim 4, it is characterized in that: it also has position locking device, position locking device is made up of ratchet (23), ratchet (2), stage clip, ratchet (2) is arranged on right holding handle (1) by straight pin (22), ratchet (23) is arranged on idler shaft (10), the front end of ratchet (2) is meshed with ratchet (23), and stage clip is pressed on ratchet (2).