CN105269507B - Coaxial counter-acting force torque wrench drive tensioner - Google Patents

Abstract

The invention discloses a coaxial counter-acting force torque wrench drive tensioner which comprises an outer sleeve, an inner sleeve and a connecting sleeve. The outer sleeve is of a barrel-shaped structure, an opening in the lower side of the outer sleeve is of an inner polygonal structure or an inner round-tooth-shaped structure, and an opening in the upper side of the outer sleeve is of an inner tooth-shaped structure or an inner key involute spline structure. The inner sleeve is of the structure of a hollow cylinder, the cross section of an inner hole in the upper part of the hollow cylinder is in a quadrangle shape, and the cross section of an inner hole in the lower part of the hollow cylinder is in a hexagon or dodecagon shape. The outer wall of the inner sleeve is in clearance fit with the smooth inner wall of the outer sleeve. An opening in the lower end of the connecting sleeve is of an outer tooth-shaped shape or an outer key involute spline structure, and is in clearance fit with the opening in the upper side of the outer sleeve. An opening in the upper end of the connecting sleeve is provided with inner teeth or an inner key involute spline. The complexity of force borne by the torque wrench drive tensioner is lowered, and the aim that the lateral eccentric load of the torque wrench drive tensioner is zero is achieved; deformation breaking of the tensioner is avoided, and the service life of the tensioner is prolonged; and acting force and counter-acting force drive mounting is convenient and fast.

Description

A Coaxial Reaction Force Torque Wrench Driven Tensioner

technical field

The invention relates to the field of torque wrench-driven tensioners, in particular to a coaxial reaction force torque wrench-driven tensioner.

Background technique

A torque wrench is a common tool for tightening or removing large gauge bolts. For example, commonly used mechanical torque wrenches include socket holes and moment arm levers. Commonly used hydraulic torque wrench, including hydraulic torque wrench body, socket, reaction arm, etc. This wrench is subjected to two force systems in the process of tightening or removing bolts, one is the anti-torsion force system, and the other is the axial shear force system, and the two force systems form an angle of 90°. In the process of adding force, the two force systems are likely to cause the bolts to be not vertical on the flange surface and the lateral load of the wrench is too large, which reduces the controllable accuracy of the wrench, and the pre-tightening force on the bolts often fails to achieve the preset effect. , and when the lateral partial load is too large, it may also cause problems such as uneven loading and stress of the bolts. This not only leads to problems such as poor pre-tightening force at high temperature, high pressure, and ultra-low temperature, easy air and water leakage, especially in the chemical industry, but also shortens the service life of bolts and wastes costs.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a coaxial reaction force torque wrench drive tensioner, the drive tensioner can simplify the torque and force system through the cooperation of the outer sleeve, the inner sleeve and the connection, and achieve The side load of the action force and reaction force is zero, the performance is reliable, and the purpose of prolonging the service life.

The technical scheme that the present invention adopts is:

A coaxial reaction force torque wrench drives a stretcher for use with a torque wrench, including an outer sleeve, an inner sleeve and a connecting sleeve;

The outer casing is a cylindrical structure with a smooth inner wall, the lower opening of the outer casing is an inner polygonal opening or an inner scalloped opening, and the upper opening of the outer casing is provided with an inner tooth shape or an inner key splitting spline structure;

The inner sleeve is placed inside the outer sleeve and has a hollow cylindrical structure with a smooth outer wall, which fits with the outer sleeve. The inner sleeve is divided into upper and lower parts. The cross section of the inner hole of the hollow cylinder in the upper part is polygonal, which is used for torque wrench The output shaft is connected; the cross-section of the inner hole of the hollow cylinder in the lower part is hexagonal or dodecagonal, which matches the outer contour of the standard nut and is used to drive the standard nut;

The lower end opening of the connecting sleeve is provided with an external tooth-like or external key open-line spline structure matching the upper opening of the jacket, the lower end of the connecting sleeve is matched with the upper end of the jacket, and the upper opening of the connecting sleeve is provided with internal teeth or The internal key open line spline is used to mesh with the external tooth on the torque wrench housing or the external key open line spline tooth.

The coaxial reaction force torque wrench drives the tensioner. A groove is arranged on the outside of the hollow cylinder on the upper part of the inner sleeve, and a pin hole is arranged on the groove. O-rings are placed in the groove, and the torque wrench The output shaft is provided with a through hole corresponding to the pin hole, and the pin connects the inner sleeve and the output shaft of the torque wrench as a whole by acting on the pin hole and the through hole, and then restricts the pin from falling off through the O-ring.

The coaxial reaction force torque wrench drives the stretcher, and the connecting sleeve is a hollow truncated cone structure, and the inner diameter decreases successively from bottom to top.

The coaxial reaction force torque wrench drives the stretcher, the lower end of the outer cover is also provided with a locking mechanism, and the locking mechanism includes a connecting lock located inside the outer cover, a hinged lock located at the left end of the connecting lock and The left buckle, the right buckle that is located at the right end of the connecting buckle and is hinged with it, and the buckle handle; the lower end of the coat has a long through hole, and one end of the buckle handle extends to the inside of the coat and the left side through the long through hole. The left end of the lock buckle is connected, and the other end of the lock buckle handle extends to the inside of the coat through the long through hole and is connected with the right end of the right lock buckle.

The coaxial reaction force torque wrench drives the stretcher, and the cross section of the lower opening of the jacket is an inner hexagon, an inner dodecagon or a scalloped structure.

The invention has the following beneficial effects:

The present invention creates a coaxial reaction force torque wrench driven tensioner, which is used in conjunction with the torque wrench to connect the active force and the reaction force with the coaxial sleeve, so that the drive tensioner in the process of applying torque to the bolt, The action force and the reaction force rotate coaxially, and the driving tensioner is only subjected to the torsional force in the direction of the torque output shaft, which reduces the complexity of the torque and force system on the tensioner, and avoids the lateral direction of the torque wrench driving the tensioner Eccentric load, you can get the torque wrench to drive the tensioner with zero lateral eccentric load, 360° coaxial force and reaction force and force arm output, guarantee the torque accuracy of 1.5%, avoid the deformation and fracture of the tensioner, and effectively extend the tensioner The service life is long, and it has the advantages of convenient installation and positioning.

The coaxial reaction force torque wrench pulls and drives the outer sleeve and the inner sleeve of the extender to form a whole, and the clearance fit between the two can achieve the goal of 360° concentric reaction force from input to output with zero error. One end of the inner sleeve is provided with a hexagonal or polygonal inner hole for driving a standard nut. The other end is provided with a quadrilateral inner hole for force torque input. There is a smooth inner hole in the outer casing, and the inner casing of the driver is slidably fitted in the outer casing of the driver, so that the acting force and the reaction force rotate coaxially, offset each other, and have no twisting force and no lateral partial load.

The coaxial reaction force torque wrench drives the tensioner with a locking mechanism inside the jacket, which is used to lock the anti-retraction tension washer or the self-reaction force coaxial washer. For the environment where the upper space is limited, it can be driven by the upside-down installation method. Studs, anti-retraction tension washers, self-reaction force coaxial washers and standard nuts do not need to be held by hand and hand-held during work, greatly improving the safety of personnel operations.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a coaxial reaction force torque wrench driven tensioner created by the present invention.

Fig. 2 is a schematic diagram of a connecting sleeve of a coaxial reaction force torque wrench driven by the present invention.

Fig. 3 is a schematic diagram of a coaxial reaction force torque wrench driven tensioner casing created by the present invention.

Fig. 4 is a schematic diagram of the lower opening of the jacket shown in Fig. 3 as a polygonal structure.

Fig. 5 is a schematic diagram of the underside opening of the jacket shown in Fig. 3 as a crenellated structure.

Fig. 6 is a schematic diagram of an inner sleeve of a coaxial reaction force torque wrench driven by the present invention.

Fig. 7 is a schematic diagram of the hole structure of the inner sleeve shown in Fig. 6 .

Fig. 8 is a schematic diagram of a coaxial reaction force torque wrench driving tensioner locking mechanism created by the present invention.

Fig. 9 is a schematic diagram of the lock mechanism in the tensioner driven by the coaxial reaction force torque wrench created by the present invention when it is locked.

Fig. 10 is a schematic diagram of the actual installation of a coaxial reaction force torque wrench driven tensioner created by the present invention.

Fig. 11 is a schematic diagram of an upside-down installation of a coaxial reaction force torque wrench driven tensioner created by the present invention.

Among them: 1-connection sleeve, 101-inner key open-line spline, 102-outer key open-line spline structure; 2-outer jacket, 201-inner polygonal opening, 201.1-inner scalloped opening, 202-inner key open-line Spline structure, 203-long through hole, 204-smooth inner wall; 3-inner sleeve, 301-hexagonal inner hole, 302-quadrilateral inner hole, 303-pin hole, 304-groove; 4-pin, 5- 0-ring, 6-lock mechanism, 7-left lock, 8-connection lock, 9-hinge, 10-right lock, 11-lock handle, 12-lock ring.

detailed description

As shown in Figure 1-11, a coaxial reaction force torque wrench drives a stretcher for use with a torque wrench, including an outer sleeve 2, an inner sleeve 3 and a connecting sleeve 1. As shown in Figure 3-5, the jacket 2 has a cylindrical structure, the lower opening of the jacket 2 is an inner polygonal opening 201 or an inner crenated opening 201.1, and the upper opening of the jacket 2 is provided with internal teeth or internal key openings. The spline structure 202, the inner wall between the upper and lower openings in the jacket 2 is a smooth inner wall 204; the lower opening of the jacket 2 can be designed as a hexagon or a dodecagon. The lower end of the overcoat 2 is also provided with a locking mechanism 6, as shown in Figure 8-10, the locking mechanism 6 includes a connecting buckle 8 located inside the overcoat 2, a left buckle 7 located at the left end of the connecting buckle 8 and hinged 9 thereto , the right buckle 10 and the buckle handle 11 located at the right end of the connection buckle 8 and hinged 9 therewith; the lower end of the overcoat 2 has a long through hole 203 as the buckle hole, and the buckle handle 11 has a handle and Locking ring 12, the locking ring 12 is connected with the handle, one end of the locking ring 12 is connected with the right end of the right buckle 10 through the long through hole 203, and one end of the handle extends to the inside of the jacket 2 through the long through hole 203 It is connected with the left end of the left buckle 7. As shown in Figure 8, it is a schematic diagram of the normal state of the locking mechanism 6, and a schematic diagram of the locked state of the locking mechanism 6 is shown in Figure 9, and the locking mechanism 6 acts on the stretch washer to ensure the same The axial reaction force torque wrench drives the tensioner as shown in Figure 10. The stability and firmness during normal installation are convenient for installation and positioning. At the same time, the locking mechanism 6 also makes the coaxial reaction force torque wrench drive the tensioner It is shown that it is installed by the upside-down method below, and there is no need to hold tools and hand-holding by hand, and the safety of personnel operation is greatly improved.

As shown in Figure 6-7, the inner sleeve 3 is a hollow cylinder structure, which is divided into upper and lower parts. The hollow cylinder in the upper part has a quadrangular inner hole 302, that is, the cross section of the inner hole of a part of the hollow cylinder is quadrilateral, which is used for and The output shaft of the torque wrench is connected; the hollow cylinder of the lower part has a hexagonal inner hole 301, that is, the cross section of the hollow cylindrical inner hole of the lower part is hexagonal, and the cross section of the hollow cylindrical inner hole of the preferred underground part is ten Diagonal, used to drive standard nuts; the inner sleeve 3 has a smooth outer wall; the inner sleeve 3 is placed inside the outer sleeve 2, and the outer wall of the inner sleeve 3 is in clearance fit with the smooth inner wall 204 of the outer sleeve 2; the upper part of the inner sleeve 2 is a hollow cylinder There is a circle of groove 304 on the outside, and a pin hole 303 is arranged on the groove 304. An O-ring 5 is placed in the groove 304, and a through hole corresponding to the pin hole 303 is arranged on the output shaft of the torque wrench. The pin hole 303 and the through hole connect the inner sleeve 3 and the output shaft of the torque wrench as a whole, and then the O-ring 5 restricts the pin 4 from falling off.

As shown in Figure 2, the lower end opening of the connecting sleeve 1 is provided with an external toothed or external key opening spline structure 102, and the external toothing or external key opening spline structure 102 connects the connecting sleeve by cooperating with the opening on the upper side of the jacket 2. 1 is installed on the jacket 2. When the opening on the upper side of the jacket is an internal tooth structure, the lower end of the connecting sleeve 1 is provided with an external tooth structure, and the connecting sleeve 1 is matched with the internal tooth structure on the upper side of the jacket 2 through the external tooth structure. Installed on the outer casing 2; when the upper opening of the outer casing 2 is an inner key opening spline structure 202, the lower end of the connecting sleeve 1 is provided with an outer key opening spline structure 102, and the connecting sleeve 1 passes through the outer key opening spline structure 102 It is mounted on the outer casing 2 in clearance fit with the internal key open-line spline structure 202 on the upper side of the outer casing 2 . The upper opening of the connecting sleeve 1 is provided with internal teeth or internal key open-line splines 101 for engaging with external teeth or external key open-line splines on the torque wrench housing. The connecting sleeve 1 is a hollow truncated conical structure, and the inner diameter decreases successively from bottom to top. The opening at the upper end of the connection sleeve 1 matches the output shaft of the torque wrench. The necked design of the connection sleeve 1 makes the coaxial reaction force torque wrench drive tensioner suitable for output shafts with any size outer diameter. The scope of application of the tensioner.

Claims (5)

1. a kind of coaxial reaction torque spanner drives stretcher, for using cooperatively with torque wrench, it is characterised in that bag Include overcoat, inner sleeve and adapter sleeve；

The overcoat is cylindrical structure, and with smooth inner wall, the open lower side of overcoat is that inner polygon opening or inner circle profile of tooth are opened Mouthful, the upper side opening of overcoat is provided with interior dentation or internal key bursts at the seams spline structure；

Jacket internal is placed in described, and inner sleeve is for hollow circular cylinder structure and inner sleeve has smooth outer wall, matches somebody with somebody with overcoat gap Close, the inner sleeve is divided into upper and lower two parts, and the cross section of the hollow circular cylinder endoporus of upper part is polygon, for pulling with moment of torsion The output shaft connection of hand；The cross section of the hollow circular cylinder endoporus of lower part is hexagon or dodecagon, with standard nut Outline matches for driving standard nut；

The lower ending opening of the adapter sleeve is provided with the outer dentation that matches with side opening on overcoat or external key bursts at the seams spline structure, even The lower end of female connector is coordinated with the upper gap of overcoat, the upper end open of adapter sleeve is provided with internal tooth or internal key bursts at the seams spline, for External tooth or external key on torque wrench housing burst at the seams spline tooth engagement.

2. a kind of coaxial reaction torque spanner drives stretcher according to claim 1, it is characterised in that the inner sleeve The outside of upper part hollow circular cylinder is provided with a circle groove, and groove is provided with pin hole, groove places O-ring, torque wrench Output shaft is provided with the through hole corresponding with pin hole, and pin is defeated with torque wrench by inner sleeve by acting on pin hole and through hole Shaft is connected as one, then is come off by O-ring restriction pin.

3. a kind of coaxial reaction torque spanner drives stretcher according to claim 1, it is characterised in that the connection Cover for hollow cone mesa-shaped structure, internal diameter is sequentially reduced from the bottom to top.

4. a kind of coaxial reaction torque spanner drives stretcher according to claim 1, it is characterised in that the overcoat Lower end be additionally provided with latching device, the latching device includes connection lock positioned at jacket internal, positioned at connection lock left end And be hinged with which left lock, the right lock positioned at being connected lock right-hand member and being hinged with which, lock handle；The lower end of the overcoat A long through-hole is provided with, one end of the lock handle is extended to jacket internal by long through-hole and is connected with the left part of left lock, The other end of the lock handle is extended to jacket internal by long through-hole and is connected with the right part of right lock.

5. a kind of coaxial reaction torque spanner drives stretcher according to claim 1, it is characterised in that the overcoat The cross section of lower ending opening is interior hexagon or interior dodecagon or circle tooth-shape structure.