CN211648737U - Fixed-torque hexagonal nut convenient to fasten - Google Patents

Abstract

The utility model discloses a fasten convenient moment of torsion hexagon nut, including two hexagonal heads, be respectively hexagonal head and lower hexagonal head, go up the hexagonal head and link as an organic wholely through the undergauge section down between the hexagonal head, go up hexagonal head, reducing section and be equipped with the shoulder hole that runs through with hexagonal head center down, the shoulder hole includes big footpath hole and path hole, and the height in path hole is highly corresponding with lower hexagonal head, is equipped with the internal thread in the path hole, and big footpath hole is the unthreaded hole. The utility model discloses the during operation, on the work piece suit double-screw bolt, then will the utility model discloses fasten convenient deciding moment of torsion hexagon nut and twist on the double-screw bolt, the disconnection of hexagonal head until the undergauge section is screwed up to the afterburning, and the size of control undergauge section is unanimous, can guarantee that the nut pretightning force is unanimous, and its simple to operate does not need artifical reinspection. The nut screwing device can be used in places inconvenient for rechecking, ensures that the nut is screwed in place at one time, and can be applied to connection and installation of a power transmission bus in a wind power tower.

Description

Fixed-torque hexagonal nut convenient to fasten

Technical Field

The utility model relates to a fastener, in particular to nut.

Background

In the electric power construction, various buses are often used for transmitting electric energy, particularly in places inconvenient to overhaul and reinforce, the first installation is firm and very important, the rechecking time of operators can be reduced, and the installation quality is improved.

In the Chinese patent database, a fixed torque nut is disclosed, and the publication number thereof is as follows: CN 202251342U; the publication date is as follows: 20120530, the device comprises a driving piece with an inner hole and a locking piece with an inner thread in the middle, the locking piece is sleeved in the inner hole of the driving piece and is in running fit, the circumference of the locking piece is at least provided with a spring sheet with a deformation part bending towards the positive rotation direction, the inner hole wall is composed of at least two variable-pitch force application surfaces taking the inner hole as the center, and the deformation surface and the non-deformation surface on the deformation part of the spring sheet are respectively attached to the two adjacent force application surfaces; under a certain torque, the driving piece drives the locking piece to be locked through the elastic piece and then continues to rotate the driving piece positively, the deformation part of the elastic piece contracts and deforms in the radial direction to continuously slide along the inner hole wall, and the driving piece rotates in an idle-load manner; the anti-rotation driving piece, the non-deformation face of interior pore wall roof pressure shell fragment, the shell fragment indeformable drives retaining member reversal unscrewing and withdraws from, and it is big than the positive arm of force of revolving because of retaining member anti-rotation arm, consequently unscrew the retaining member more laborsavingly, and rotate the maximum torsion that the control shell fragment loaded the retaining member through the pore wall in the driving piece, can not harm the part, used repeatedly many times. The disadvantages are that: the device structure is complicated, in the use, can not direct indication nut's locking force whether target in place, and the nut that does not lock can not directly be found to lead to its safety in utilization not high enough, need personnel to reinsert.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fastening convenient decides moment of torsion hexagon nut for the work piece fastening is convenient, and the moment of torsion is invariable, easily discerns whether to install in place.

The purpose of the utility model is realized like this: the utility model provides a fastening convenient fixed torque hexagon nut, includes two hexagonal heads, is respectively hexagon head and lower hexagonal head, goes up the hexagonal head and links as an organic wholely through the undergauge section down between the hexagonal head, go up the hexagonal head, reduce the footpath section and be equipped with the shoulder hole that runs through with lower hexagonal head center, the shoulder hole includes big footpath hole and aperture hole, and the height in aperture hole is highly corresponding with lower hexagonal head, is equipped with the internal thread in the aperture hole, and big footpath hole is the unthreaded hole.

The utility model discloses the during operation is earlier on the work piece suit double-screw bolt, then will the utility model discloses fasten convenient deciding moment of torsion hexagon nut and twist on the double-screw bolt, require to have internal screw thread one end towards the work piece, the disconnection of hexagonal head until the undergauge section on the afterburning was screwed up, during the manufacturing, the size of control reducing section is unanimous, can guarantee that the moment of torsion is unanimous, also the pretightning force of nut is unanimous.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. when this nut need be screwed up in the installation, hexagonal head is screwed up to the thrust reduction section, be twisted off for go up hexagonal head and hexagonal head looks mutual separation down, through manufacturing process, guarantee that the inside and outside footpath of thrust reduction section is unanimous, the wall thickness equals, thereby make its moment of torsion that the shear fracture needs invariable, consequently, can reduce installer to the controlling requirement of the nut degree of screwing up, only need twist off, can guarantee that the moment of torsion is unanimous, make installation quality controllable and stable, when different workman installs, the pretightning force of nut is unanimous.

2. The nut screwing tool is easy to identify, whether the nut is screwed down can be observed at a longer distance, and manual recheck is not needed.

The nut is used as a fastener, can be used in places inconvenient for rechecking, ensures that the nut is screwed in place once, and can be applied to connection and installation of a power transmission bus in a wind power tower.

As an easy embodiment of the present invention, there can be two forms, one of which is: the size of the upper hexagonal head is equal to that of the lower hexagonal head. This scheme is made conveniently, and the shortcoming is that, when adopting the spanner to screw up the nut, screw the hexagon head down easily, lead to not being enough simple and convenient in the operation. The second is as follows: the size of the upper hexagonal head is smaller than that of the lower hexagonal head. This scheme can effectively solve the maloperation problem when the nut is screwed up, because the size is inconsistent for the hexagonal head is screwed up to the spanner when screwing up, can not wrong screw up down the hexagonal head.

As a further improvement, the reducing section is externally provided with a separation blade, and the diameter size of the outer circle of the separation blade is not less than the diameter of the outer circle of the lower hexagon head. The separation blade can block the lower hexagonal head, so that the hexagonal head cannot be unscrewed by mistake when the nut is screwed by the wrench, the separation blade falls out or is taken out after the upper hexagonal head is unscrewed, and then the wrench can contact the lower hexagonal head, so that the use safety is improved, and the possibility of misoperation is reduced.

In order to facilitate the installation of the separation blade, the single side opening of the separation blade is movably clamped outside the reducing section. This scheme makes the separation blade can make separately and install outside the reducing section, and current metal material and plastic material can make sheet structure's separation blade, all has certain elasticity, can movably the joint outside the reducing section, goes up the hexagon head and separates the back with lower hexagon head, and the separation blade can be conveniently taken out. Whether the blocking piece is taken out or not can be quickly judged by observing whether the nut is screwed in place or not.

The baffle plate is made of a material with easily identifiable color for identification. For example made of orange-yellow, red plastic. The nut screwing device has the advantages of being striking and easy to observe, and whether the nut is screwed to the position or not can be visually observed at a glance.

Furthermore, the front surface and the back surface of the baffle plate are provided with different colors. Adopt two kinds of different colours, can artificially prescribe that a certain face is outwards, when the installation separation blade, fix with a colour towards hexagon head, when the installation, through colour discernment, can avoid the nut to be installed by the reversal.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a perspective view of the present invention shown in fig. 1.

Fig. 3 is a schematic diagram of a second structure of the present invention.

Fig. 4 is a perspective view of the present invention shown in fig. 3.

In the figure, 1 is an upper hexagonal head, 2 is a reducing section, 3 is a lower hexagonal head, 4 is an internal thread, and 5 is a baffle plate.

Detailed Description

The present invention will be further explained with reference to the following embodiments, wherein the upper, lower, left, right, front and rear parts of the present invention are only used to express the corresponding relationship when connecting, but not to absolutely limit the installation position, and the present invention can be turned, inclined and inverted as a whole.

Example 1

As shown in fig. 1-2, a fixed torque hexagon nut convenient for fastening comprises two hexagon heads, namely an upper hexagon head 1 and a lower hexagon head 3, wherein the upper hexagon head 1 and the lower hexagon head 3 are connected into a whole through a reducing section 2, the centers of the upper hexagon head 1, the reducing section 2 and the lower hexagon head 3 are provided with through stepped holes, each stepped hole comprises a large-diameter hole and a small-diameter hole, the height of the small-diameter hole corresponds to the height of the lower hexagon head 3, the height of the small-diameter hole can be equal to the height of the lower hexagon head 3, and the small-diameter hole can also be slightly different from the small-diameter hole, the small-diameter hole is provided with an internal thread 4, the large-diameter hole is an unthreaded hole, and the size of the unthreaded hole can ensure that a corresponding screw or a stud can move freely.

The upper hexagon head 1 and the lower hexagon head 3 are equal in size. A baffle 5 is arranged outside the reducing section 2, and the diameter size of the excircle of the baffle 5 is not less than the diameter of the circumscribed circle of the lower hexagonal head 3. The baffle 5 is opened at one side and can be movably clamped outside the reducing section 2. The baffle 5 is made of a material whose color is easily recognizable. The front and back surfaces of the baffle 5 are provided with different colors.

The separation blade 5 can be made into the sheet structure by metal material and plastic material, guarantees that it all has certain elasticity, can the activity joint outside reducing section 2, goes up hexagon head 1 and separates the back with lower hexagon head 3, and separation blade 5 can be taken out conveniently. Whether the separation blade 5 is taken out or not is observed, whether the nut is screwed in place or not can be judged rapidly, and meanwhile, the consistency of the pretightening force of the nut is guaranteed.

Example 2

As shown in fig. 3 to 4, the difference from embodiment 1 is that: the size of the upper hexagon head 1 is smaller than that of the lower hexagon head 3. The position of the internal thread 4 can be identified by the size difference of the upper hexagonal head 1 and the lower hexagonal head 3, and the nut can be prevented from being reversely installed.

This scheme can effectively solve the maloperation problem when the nut is screwed up, because the size is inconsistent for the hexagonal head 3 under can not wrong be screwed up when hexagonal head 1 is screwed up in the spanner.

Example 3

The difference from example 1 is that: need not install the separation blade, through make the identification mark on last hexagon head 1 or lower hexagon head 3, direction when can judging the installation avoids the nut dress to turn over.

In addition, the separation blade 5 can be connected with the upper hexagonal head 1 into a whole.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.

Claims (7)

1. The utility model provides a fasten convenient fixed torque hexagon nut which characterized in that: including two hexagonal heads, be respectively hexagonal head and lower hexagonal head, go up the hexagonal head and link as an organic wholely through the undergauge section down between the hexagonal head, go up hexagonal head, reduce footpath section and hexagonal head center down and be equipped with the shoulder hole that runs through, the shoulder hole includes big footpath hole and path hole, and the height and the lower hexagonal head height of path hole are corresponding, are equipped with the internal thread in the path hole, and big footpath hole is the unthreaded hole.

2. The constant-torque hexagonal nut convenient to fasten as claimed in claim 1, wherein: the size of the upper hexagonal head is equal to that of the lower hexagonal head.

3. The constant-torque hexagonal nut convenient to fasten as claimed in claim 1, wherein: the size of the upper hexagonal head is smaller than that of the lower hexagonal head.

4. A constant torque hexagonal nut with a convenient fastening according to any one of claims 1 to 3, wherein: the reducing section is externally provided with a baffle plate, and the diameter size of the outer circle of the baffle plate is not less than the diameter of the outer circle of the lower hexagonal head.

5. The hexagonal fixed torque nut of claim 4, wherein the blocking piece is open at one side and can be movably clamped outside the reducing section.

6. A convenient fastening constant torque hexagonal nut as claimed in claim 4, wherein the blocking plate is made of a material with easily recognizable color.

7. The hexagonal fixed torque nut as claimed in claim 4, wherein the blocking plate has different colors on both sides.

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