CN214490372U

CN214490372U - Bidirectional force-adding preset torque wrench

Info

Publication number: CN214490372U
Application number: CN202120405484.3U
Authority: CN
Inventors: 谢文恺; 张振平; 严军辉; 李华栋; 徐峰
Original assignee: Avic Shaanxi Dongfang Aviation Instrument Co ltd
Current assignee: Avic Shaanxi Dongfang Aviation Instrument Co ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-10-26
Anticipated expiration: 2031-02-24

Abstract

The utility model discloses a two-way afterburning preset torque wrench, including spanner pole, sleeve, the handle formula moment of torsion that is located sleeve rear end preset the mechanism, moment of torsion preset the mechanism including the spring of presetting the moment of torsion and clamp the slider at this spring front end, its characterized in that: the middle position of the end face of the tail part of the wrench rod is provided with a stepped blind hole, the center position of the bottom of the slider is also provided with a stepped blind hole, the axes of the two stepped blind holes are both positioned on the axis of the sleeve, a balance swing rod is arranged between the two stepped blind holes, and the two ends of the balance swing rod are respectively inserted into the two stepped blind holes. The utility model discloses can two-way afterburning, the different work of screwing up of turning round certainly of screw thread can be done to a spanner, and not only assembly personnel convenient operation, laborsaving, work efficiency can obviously improve moreover.

Description

Bidirectional force-adding preset torque wrench

Technical Field

The utility model belongs to the technical field of torque wrench, a preset torque wrench is related to.

Background

In the existing preset torque wrench, a swing guide rod mechanism in a sleeve is of an asymmetric lever structure, and the wrench is divided into a left-handed force application mode and a right-handed force application mode, namely, one preset torque wrench can only apply torque in one direction and does not have a bidirectional force application function. In reality, bolts with threads in different screwing directions are required to be screwed on some assembly stations, so that an operator always carries two preset torque wrenches in a positive mode and a negative mode to finish the screwing task of all the bolts on the assembly stations during assembly operation. Obviously, the work efficiency of using such tools is not high and the assembly workers are also tired.

Disclosure of Invention

The utility model aims to overcome the defect that the existing preset torque wrench can only apply torque in one direction, and provides a preset torque wrench capable of bidirectional stress application.

The utility model adopts the technical proposal that: a bidirectional stress application preset torque wrench comprises a wrench rod, a sleeve and a handle type torque preset mechanism located at the rear end of the sleeve, wherein the wrench rod is inserted into the sleeve, the front end of the sleeve is hinged with the neck of the wrench rod through a pin shaft, the wrench rod is provided with a swing gap in the sleeve, the torque preset mechanism comprises a spring for presetting torque and a slider clamped at the front end of the spring, and the bidirectional stress application preset torque wrench is characterized in that a step type blind hole is formed in the center of the end face of the tail portion of the wrench rod, a step type blind hole is also formed in the center of the bottom of the slider, the axes of the two step type blind holes are located on the axis of the sleeve, a balance swing rod is installed between the two step type blind holes, and the two ends of the balance swing rod are respectively inserted into the two step type blind holes.

Furthermore, the balance swing rod is composed of a balance block and a cylindrical pin shaft, a circular through hole is formed in the center line position of the balance block, and the pin shaft is inserted into the circular through hole and forms clearance fit.

Furthermore, the balancing block is in a square column shape, and two ends of the pin shaft are both in spherical shapes.

Furthermore, the front section of the stepped blind hole is square, and the rear section of the stepped blind hole is cylindrical.

Furthermore, the two ends of the balance block are respectively abutted to the shoulders of the two stepped blind holes.

The utility model discloses the spanner is when not afterburning, and the axis of balanced pendulum rod in the sleeve coincides with the central line of spanner pole and slider, just so to say that each part in the sleeve is all in the central line position this moment. In the process of screwing the bolt, if a left-hand direction moment is applied to the wrench, the wrench rod and the balance swing rod inside the wrench gradually incline towards the left-hand side, when the applied moment reaches a preset moment, the wrench rod and the balance swing rod reach the maximum inclination angle towards the left-hand side, unbalance overturning occurs, the tail end of the wrench rod at the moment can impact the inner wall of the sleeve and make a sound, a worker can feel and hear the impact and the sound, the stress application can be stopped, and after the applied moment is cancelled, the wrench rod and the balance swing rod can naturally reset to the initial central line position under the action of the spring thrust. If the right-handed torque is applied to the wrench, the wrench rod and the balance swing rod in the wrench gradually incline towards the right-handed side until reaching the maximum inclination angle, and the wrench rod and the balance swing rod naturally return to the initial neutral position under the action of the thrust of the spring after the torque is removed.

The utility model discloses can two-way afterburning, the different work of screwing up of turning round certainly of screw thread can be done to a spanner, and not only assembly personnel convenient operation, laborsaving, work efficiency can obviously improve moreover.

Drawings

Fig. 1 is a schematic view of the overall structure of an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic perspective view of the balancing swing link in the embodiment shown in fig. 1.

FIG. 4 is a schematic view showing the construction of the spanner bar in the embodiment shown in FIG. 1.

Fig. 5 is a right side view of the wrench rod shown in fig. 4.

FIG. 6 is a schematic view of the slider of the embodiment of FIG. 1.

Fig. 7 is a left side view of the slider shown in fig. 6.

Fig. 8 is a schematic view of the internal mechanism of the present invention when applying a left-hand torque.

Fig. 9 is a schematic diagram of the internal mechanism of the present invention when applying a right-hand torque.

In the figure: 1. the wrench comprises a wrench head, 2 parts of a sleeve, 3 parts of a wrench rod, 3-1 parts of a stepped blind hole, 3-1-1 parts of a square hole, 3-1-2 parts of a round hole, 4 parts of a pin shaft, 5 parts of a balance block, 5-1 parts of a through hole, 6 parts of a sliding block, 6-1 parts of the stepped blind hole, 6-1-1 parts of the square hole, 6-1-2 parts of the round hole, 7 parts of a spring, 8 parts of a sheath, 9 parts of an adjusting wheel, 10 parts of a handle, 11 parts of a positioning block, 12 parts of an adjusting bolt, 13 parts of a screw plug, 14 parts of a dividing wheel, 15 parts of a nut, 16 parts of the pin shaft and F parts of an external load.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the bidirectional force-applying preset torque wrench of the present invention comprises a wrench head 1, a wrench rod 3, a sleeve 2 and a torque preset mechanism at the rear end of the sleeve 2, wherein the wrench head 1 and the wrench rod 3 are integrated into a whole, the wrench rod 3 is inserted into the sleeve 2, the front end of the sleeve 2 is hinged with the neck of the wrench rod 3 through a pin shaft 16, the wrench rod 3 has a swing gap in the sleeve 2, the torque presetting mechanism comprises a spring 7 for presetting torque and a slide block 6 clamped at the front end of the spring 7, the utility model is characterized in that a step blind hole 3-1 is arranged at the center of the end surface of the tail part of the wrench rod 3, a step blind hole 6-1 is arranged at the center of the bottom of the slide block 6, a balance swing rod is arranged between the step blind hole 3-1 and the step blind hole 6-1, and two ends of the balance swing rod are respectively inserted into the step blind hole 3-1 and the step blind hole 6-1.

In the present embodiment, the first and second electrodes are,

the balance swing rod is composed of a balance block 5 and a cylindrical pin shaft 4, the balance block 5 is in a square column shape, and two end heads of the pin shaft 4 are in spherical shapes. A circular through hole 5-1 is formed in the center line of the balance block 5, and the pin shaft 4 is inserted into the through hole 5-1 and forms clearance fit with the through hole 5-1, as shown in fig. 3;

the front section of the stepped blind hole 3-1 is square, namely a square hole 3-1-1, and the rear section is cylindrical, namely a round hole 3-1-2, as shown in fig. 4 and 5; the front section of the stepped blind hole 6-1 is square, namely a square hole 6-1-1, and the rear section is cylindrical, namely a round hole 6-1-2, as shown in FIGS. 6 and 7; two ends of the balance weight 5 abut against shoulders of the stepped blind hole 3-1 and the stepped blind hole 6-1 respectively, as shown in fig. 2. The side length of the square hole 3-1-1 and the side length of the square hole 6-1-1 are both larger than that of the end face of the balance block 5, so that two ends of the balance block 5 are in enough swing space in the corresponding stepped blind holes.

The utility model provides a moment of torsion preset mechanism includes slider 6, spring 7, sheath 8, regulating wheel 9, handle 10, locating piece 11, adjusting bolt 12, plug screw 13, indexing wheel 14 and nut 15, 7 one end of spring is fixed on slider 6, the other end of spring 7 is fixed on adjusting bolt 12, be threaded connection between adjusting bolt 12 and the locating piece 11, locating piece 11 is fixed with sleeve 2, sheath 8, regulating wheel 9, handle 10, locating piece 11, plug screw 13, indexing wheel 14, and nut 15 is connected with adjusting bolt 12 and is a whole. When the adjusting wheel 9 and the handle 10 are rotated, the adjusting bolt 12 is driven to rotate, and the positioning block 11 is fixed with the sleeve 2, so that the rotation of the adjusting bolt 12 moves forwards or backwards, the compression amount of the spring 6 is changed, the positive pressure transmitted by the spring 6 to the sliding block 6, the balance weight 5 and the wrench rod 3 is changed, and the preset torque is achieved.

As shown in fig. 8, in the using process, the wrench head 1 is matched with a tightened bolt, when a right-handed external load F is applied to the wrench, the wrench rod 3 drives the wrench head 1 to apply a torque M to the tightened workpiece, when the external load F is increased, the torque M is continuously increased, meanwhile, the wrench rod 3 rotates around the pin shaft 16, the tail end of the wrench rod 3 drives the balance block 5 to gradually incline towards the right-handed side, when the torque M reaches a preset torque, the wrench rod and the balance swing rod reach the maximum inclination angle towards the right-handed side and generate unbalanced turnover, the tail end of the wrench rod at the moment can strike the inner wall of the sleeve and generate sound, which indicates that the tightening torque of the wrench on the bolt reaches a preset value, and the tightening task of the bolt is completed. When the applied moment is cancelled, the wrench rod 3 and the balance swing rod can naturally reset to the initial neutral line position under the action of the thrust of the spring.

The pin shaft 4 penetrates through the balance block 5, and two ends of the balance block 5 are respectively abutted against shoulders of the stepped blind hole 3-1 and the stepped blind hole 6-1, so that the balance block 5 cannot fall off, and the balance swing rod cannot fall off integrally.

When the applied load is in the left-hand direction, the inclination and overturning directions of the wrench rod 3 and the balance swing rod in the wrench are opposite to the direction when the right-hand load is applied, as shown in fig. 9.

Claims

1. The utility model provides a two-way afterburning preset torque spanner, includes wrench rod, sleeve, is located the handle formula moment of torsion preset mechanism of sleeve rear end, and the wrench rod cartridge is in the sleeve, and the sleeve front end is articulated through the round pin axle with the wrench rod neck, and the wrench rod has the swing clearance in the sleeve, and moment of torsion preset mechanism includes the spring of preset moment of torsion and clamps the slider at this spring front end, its characterized in that: the wrench rod is characterized in that a step type blind hole is formed in the center of the end face of the tail portion of the wrench rod, a step type blind hole is also formed in the center of the bottom of the sliding block, the axes of the two step type blind holes are located on the axis of the sleeve, a balance swing rod is installed between the two step type blind holes, and the two ends of the balance swing rod are respectively inserted into the two step type blind holes.

2. The preset torque wrench with bidirectional force application as claimed in claim 1, wherein: the balance swing rod is composed of a balance block and a cylindrical pin shaft, a circular through hole is formed in the center line of the balance block, and the pin shaft is inserted into the circular through hole and forms clearance fit.

3. The preset torque wrench with bidirectional force application as recited in claim 2, further comprising: the balancing block is in a square column shape, and two ends of the pin shaft are both in spherical shapes.

4. The preset torque wrench with bidirectional force application as claimed in claim 1, wherein: the front section of the stepped blind hole is square, and the rear section of the stepped blind hole is cylindrical.

5. The preset torque wrench with bidirectional force application as recited in claim 2, further comprising: and two ends of the balance weight are respectively abutted against the shoulders of the two stepped blind holes.