CN211639752U

CN211639752U - Screw pile screwing tool

Info

Publication number: CN211639752U
Application number: CN202020189774.4U
Authority: CN
Inventors: 宋玮; 朱鹏举
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-10-09
Anticipated expiration: 2030-02-20

Abstract

An object of the utility model is to provide a frock is screwed up to stud can realize the quick accurate installation to the double-screw bolt. The stud tightening tool for achieving the above object is used for tightening a stud to a member to be installed, and includes a base body and a force applying member. The pedestal is fixed to be set up on being installed the piece, has first slot portion, and the internal perisporium of first slot portion is provided with first screw thread portion, and the guiding hole that allows the stud to pass through is seted up to the tank bottom of first slot portion. The force application part is provided with a force application part and a tightening part, the outer peripheral side wall of the tightening part is provided with a second thread part, a second circular groove part is arranged in the tightening part, and the inner peripheral side wall of the second circular groove part is provided with a third thread part. The first thread part and the second thread part can be connected in a threaded fit mode, the stud can be screwed into the force application part through the third thread part and abuts against the groove bottom of the second circular groove part in a screwed-in state, and the thread turning directions of the second thread part and the third thread part are opposite.

Description

Screw pile screwing tool

Technical Field

The utility model relates to a frock is screwed up to stud.

Background

In an aircraft engine structure, a large number of stud fasteners are often used when a casing is connected to a casing, a casing is connected to a bearing mounting seat, and a cover plate. Both ends of the part are of threaded structures, one end of the part is screwed into the casing in actual use, and the other end of the part penetrates through a bolt hole of the bearing seat or the cover plate and is screwed with the nut. Studs for such applications are typically used in dozens, even dozens, of groups at a time.

Fig. 1 shows a schematic diagram of a stud in the prior art, wherein reference numeral 9 is a schematic structure of a casing mechanism, 91 is a schematic structure of a stud, and both ends of the stud 91 have a thread structure. When the stud 91 is attached, two nuts 92 are usually screwed to one end of the stud, and the stud 91 can be screwed into the casing 9 by applying a torque to the outer nut 92.

However, the inventor finds that the existing assembly tool cannot control the uniformity of the applied torque in the screwing process, the assembly is often performed by an assembler operating a torque wrench by experience, and due to the fact that the length of the stud is long (usually over 40mm, and the length is 60mm individually), the rigidity is poor, the length direction of the stud is easy to deform in the uneven torque application process, and even the individual stud is deformed visually after the assembly is completed. After all studs are screwed into the casing, the bearing seat or the cover plate needs to be aligned with the casing, and the bolt mounting holes of the bearing seat or the cover plate correspondingly penetrate through the studs. However, as dozens of studs are provided, and several individual studs deform and deflect, the whole stud group cannot simultaneously penetrate through corresponding mounting holes of the bearing seat or the cover plate, so that the assembly cannot be carried out, the studs which cannot penetrate through the bearing seat or the cover plate often need to be corrected in actual work, and the studs are usually knocked during correction, so that the risk of cracks generated in the studs is increased; in order to detect whether cracks are generated, the orthopedic stud needs to be subjected to fluorescence detection in an assembly state, a fluorescence penetrating agent needs to be coated on the surface of the stud, and cleaning liquid inevitably enters a cavity of the casing during subsequent cleaning, so that the casing is polluted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a frock is screwed up to stud can realize the quick accurate installation to the double-screw bolt.

To achieve the above object, a stud tightening tool for tightening a stud to a member to be installed includes:

the base body is fixedly arranged on the installed part and is provided with a first circular groove part, a first threaded part is arranged on the inner peripheral wall of the first circular groove part, and a guide hole allowing the stud to pass through is formed in the bottom of the first circular groove part; and the number of the first and second groups,

the force applying part is provided with a force applying part and a tightening part, the outer peripheral side wall of the tightening part is provided with a second thread part, a second circular groove part is arranged in the tightening part, and the inner peripheral side wall of the second circular groove part is provided with a third thread part;

the first thread part and the second thread part can be connected in a threaded fit mode, the stud can be screwed into the force application part through the third thread part and abuts against the groove bottom of the second circular groove part in a screwed-in state, and the thread screwing directions of the second thread part and the third thread part are opposite.

In one or more embodiments, the first circular groove portion and the second circular groove portion are opened in an installation direction of the stud.

In one or more embodiments, the mounted member is annular, the seat body is an annular member matching the shape of the mounted member, and the first circular groove portions are formed along a circumference of an end surface of the annular member.

In one or more embodiments, the base body is further provided with a connecting hole, and a fastener passes through the connecting hole to fixedly connect the base body and the installed part.

In one or more embodiments, a first spigot portion is provided on the base, a second spigot portion is provided on the mounted part, and the base and the mounted part are positioned by the spigot in a matching manner.

In one or more embodiments, the mounted member is a casing.

In one or more embodiments, the stud has threads at both ends and a smooth shank in the middle, which fits the guide hole with a clearance.

In one or more embodiments, the force application portion is a handle.

In one or more embodiments, the screw thread at the end of the stud to which the mounted member is fitted is an interference fit screw thread.

The beneficial effects of the utility model reside in that: through adopting this screw pile to screw up frock, when can realizing screwing up the screw pile fast, through screw-thread fit's accuracy, guaranteed that the screw pile is difficult for producing the slope in assembling process, guarantee to quick, accurate installation of screw pile.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic representation of a prior art screw pile in use;

FIG. 2 is a schematic top view of the stud tightening tool in an assembled state;

FIG. 3 is a schematic view of the base viewed from a top view;

FIG. 4 is a schematic view of the force applying member viewed from a front angle;

FIG. 5 is a schematic cross-sectional view taken along A-A of FIG. 3;

FIG. 6 is a schematic cross-sectional view taken along the line B-B in FIG. 4;

FIG. 7 is a schematic cross-sectional view taken along the direction C-C in FIG. 2;

FIG. 8 is a schematic diagram of an embodiment of a stud in elevation;

fig. 9 is a schematic cross-sectional view taken along the direction D-D in fig. 2.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and are not intended to limit the scope of the present disclosure. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

It should be noted that, where used, the following description of upper, lower, left, right, front, rear, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object.

It should be noted that these and other figures are given by way of example only and are not drawn to scale, and should not be construed as limiting the scope of the invention as it is actually claimed. Further, the conversion methods in the different embodiments may be appropriately combined.

As shown in fig. 2, which is a schematic top view of a tool for screwing a stud to a member to be installed, it can be understood that fig. 2 is a schematic top view of the tool installed on the member to be installed, and the tool shown in fig. 2 is a three-dimensional device having a certain height in a direction perpendicular to a paper plane, and includes a seat body 1 and a force applying member 2.

Fig. 3 is a schematic diagram of the seat body 1 viewed from a top view angle, fig. 4 is a schematic diagram of the force application member viewed from a front view angle, fig. 5 is a schematic diagram of a cross section taken along a-a direction in fig. 3, fig. 6 is a schematic diagram of a cross section taken along a B-B direction in fig. 4, fig. 7 is a schematic diagram of a cross section taken along a C-C direction in fig. 2, and fig. 8 is a schematic diagram of a front view of one embodiment of the stud 3.

Referring to fig. 3 and 5, the seat body 1 has a first circular groove portion 10, a first threaded portion 11 is disposed on an inner peripheral side wall of the first circular groove portion 10, specifically, the first threaded portion 11 is disposed in the first circular groove portion in a manner of internal thread, and a guide hole 12 for allowing the stud 3 to pass through is disposed at a bottom of the first circular groove portion 10.

Referring to fig. 4 and 6, the biasing member 2 has a biasing portion 21 and a tightening portion 22, an outer peripheral side wall of the tightening portion 22 has a second thread portion 221, a second circular groove portion 222 is opened inside, an inner peripheral side wall of the second circular groove portion 222 is provided with a third thread portion 223, specifically, the second thread portion 221 starts at the outer peripheral side wall of the tightening portion 22 in a male screw manner, and the third thread portion 223 is opened at the inner peripheral side wall of the second circular groove portion 222 in a female screw manner.

Referring to fig. 7, in the assembled state, the first thread portion 11 is in thread fit with the second thread portion 221, and the one end 31 of the stud 3 can be screwed into the force application member 2 through the third thread portion 223 and can abut against the groove bottom of the second circular groove portion 222 in the screwed state as shown in the figure. The thread directions of the second thread part 221 and the third thread part 223 are opposite, that is, the thread direction of the second thread part 221 and the thread part 31a of the stud 3 screwed into the end 31 of the force application member 2 is the same, and the thread direction of the first thread part 11 and the thread direction of the third thread part 223 are the same, so that the thread connection part of the force application member 2 and the stud 3 is not unscrewed when the force application member 2 is screwed into the first circular groove part 10 during the screwing assembly process.

The method for assembling the stud by adopting the tool comprises the following steps:

firstly, the seat body 1 and the installed part are fixedly connected, and then the stud 3 is screwed into the force application part 2 until the end surface of one end 31 of the stud 3 abuts against the groove bottom of the second circular groove part 222.

Subsequently, the force application member 2 is preliminarily screwed into the first circular groove portion 10 by the threaded engagement of the second threaded portion 221 with the first threaded portion 11, and during the screwing, the stud 3 is gradually passed through the guide hole 12 and preliminarily screwed into the mounted member 4.

Next, by further applying a moment to the force application portion 21, the threaded portion 32a of the end 32 of the stud 3 abutting the attached member 4 is screwed into the attached member 4, the first threaded portion 11 and the second threaded portion 221 are engaged during screwing, and the third threaded portion 223 is engaged with the stud 3, ensuring uniformity of the force application direction during screwing. Meanwhile, torque is applied to stud 3 through abutment of the groove bottom of second circular groove portion 222 against stud 3 and threaded connection of third threaded portion 223 with stud 3, and force application member 2 is continuously rotated until assembly of stud 3 is completed.

Finally, after assembly, the force application element 2 is turned in the opposite direction to unscrew the force application element from the stud 3.

Through adopting this screw pile to screw up frock, when can realizing screwing up the screw pile fast, through screw-thread fit's accuracy, guaranteed that the screw pile is difficult for producing the slope in assembling process, guarantee to quick, accurate installation of screw pile.

Although one embodiment of the present stud tightening tool is described above, in other embodiments of the present stud tightening tool, the components of the stud tightening tool may have more details in many respects than the embodiments described above, and at least some of these details may vary widely. At least some of these details and variations are described below in several embodiments.

Referring to fig. 7, in one embodiment of the stud tightening tool, the opening direction of the first round groove portion 10 and the second round groove portion 222 is the same as the mounting direction of the stud 3, thereby further ensuring that the stud does not tilt during tightening.

With continued reference to fig. 2, in one embodiment of the stud tightening tool, the installed part 4 is annular, the seat body 1 is a ring-shaped part matching the installed part in a collision manner, and the first circular groove parts 10 are formed along a circumference of an end surface of the ring-shaped part. Specifically, the positions and the number of the first circular groove portions are determined by the number and the positions of the studs to be fitted to the to-be-fitted member 4. In other embodiments different from those shown, the shape of the seat body 1 is not limited to the same annular shape as the installed part 4, and may be other suitable shapes, and by assembling with the installed part 4 at a position corresponding to a required stud installation, the stud 3 at a different position on the installed part 4 is assembled.

Fig. 9 is a schematic cross-sectional view taken along the direction D-D in fig. 2, wherein the seat body 1 is further provided with a connecting hole 13, and correspondingly the mounted part 4 is also provided with a mounting hole 40, and the fastening member 5 is inserted through the connecting hole 13 to achieve the fixed mounting between the seat body 1 and the mounted part 4. In one embodiment, the fastener connecting the holder body 1 and the mounted member 4 may be a positioning pin.

With continued reference to fig. 7, in an embodiment of the stud fastening tool, a first spigot portion 14 is provided on the base 1, and a second spigot portion 44 is provided on the mounted member, wherein the base 1 and the mounted member 4 are positioned by spigot fit, and during assembly, the base 1 and the mounted member 4 can be fixedly connected by fasteners such as positioning pins after the base 1 and the mounted member 4 are positioned by spigot fit between the first spigot portion 14 and the second spigot portion 44.

In one embodiment of the stud tightening tool, the mounted member 4 is a casing.

With continued reference to fig. 8, in one embodiment of the stud tightening tool, the stud 3 has

threads

31a, 32a at both ends and a smooth shank portion 33 in the middle, the smooth shank portion 33 being a clearance fit with the pilot hole 12, so that the pilot hole 12 ensures that the stud 3 does not deflect during assembly.

In one embodiment of the stud tightening tool, the force application portion 21 is a handle, wherein features such as patterns or the like that increase friction may be provided on the handle to facilitate the operator applying torque to the force application member 2 via the handle.

In one embodiment of the stud tightening tool, the screw thread 32a of the end 32 of the stud 3 to be attached to the attached member 4 is an interference fit screw thread, and since the interference fit screw thread is hard to be unscrewed even if it is reversely rotated after the attachment is completed, the stud 3 is not removed from the attachment position when the force application part 21 is reversely rotated. Specifically, the thread between stud 3 and installed part 4 may be an interference fit thread, which is automatically anti-loose after being screwed in, such as AG and CG interference threads.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.

Claims

1. The utility model provides a frock is screwed up to the stud on being installed part, its characterized in that includes:

2. The stud tightening tool according to claim 1, wherein the first circular groove portion and the second circular groove portion are provided along an installation direction of the stud, respectively.

3. The stud tightening tool according to claim 1, wherein the mounted member is annular, the seat body is an annular member having a shape matching the mounted member, and the first circular groove portions are formed along a circumference of an end surface of the annular member.

4. The stud fastening tool according to claim 3, wherein the base body is further provided with a connecting hole, and a fastener penetrates through the connecting hole to fixedly connect the base body and the to-be-installed member.

5. The stud tightening tool of claim 3, wherein the base is provided with a first spigot portion, the mounted member is provided with a second spigot portion, and the base and the mounted member are positioned by spigot fit.

6. The stud tightening tool according to claim 3, wherein the mounted member is a casing.

7. The stud tightening tool according to claim 1, wherein the stud has threads at both ends thereof and a smooth shank portion in the middle thereof, and the smooth shank portion is in clearance fit with the guide hole.

8. The stud tightening tool according to claim 1, wherein the force application portion is a handle.

9. The stud tightening tool according to claim 1, wherein the threads at the end where the stud is fitted to the to-be-fitted member are interference fit threads.