A preloading tool for slotted bushings and method of use

Abstract

The application discloses a slotted bushing preloading tool which is composed of a top cover, a spring, a clamping block, a top sleeve, a shell, a base and a spring seat block. The shell is provided with three grooves for mounting the clamping block, and the side wall of the groove is provided with a hole for mounting the spring seat block, so that the spring is connected and fixed with the shell. The clamping block is internally provided with a spring hole for mounting the spring, and the spring and the shell are fixed. The bottom of the top sleeve is provided with a thread for connecting with the base. The top sleeve is provided with a groove and has a certain elasticity through process closing, so that the slotted bushing can pass through the core rod while being limited. The base is provided with a thread for connecting with the shell. The slotted bushing preloading tool can save time and labor in the installation process of the slotted bushing, avoids direct contact of workers with sharp edges of the slotted bushing, avoids scratches on the arms of the workers, and can avoid damage of the slotted bushing after installation to the greatest extent. Therefore, the installation quality and efficiency of the slotted bushing are further improved.

Description

Technical Field

[0001] This invention relates to the field of cold extrusion installation, and specifically discloses a pre-installation tool for slotted bushings and its usage method. Background Technology

[0002] Currently, cold extrusion strengthening technology for slotted bushings is relatively advanced and widely used in the aerospace field. However, there is no fixed installation method for slotted bushings in China; they are often installed by hand, which is not only inconvenient but also poses a risk of injury to workers. Summary of the Invention

[0003] The purpose of this invention is to provide a pre-installation tool for slotted bushings to improve installation efficiency and reduce the probability of worker injury during installation.

[0004] This invention provides a pre-assembly tool for a slotted bushing, comprising a top cover, a spring, a clamping block, a top sleeve, a housing, a base, and a spring seat block. The top cover has an annular cavity structure with a mounting hole at one end and an internal thread at the other end that mates with an external thread at one end of the housing. The mounting hole size must match the size of the slotted bushing. The housing has a hollow cylindrical structure, with an internal thread at the other end that mates with an external thread at one end of the base. The housing forms a first cavity and a second cavity that communicate within it. The diameter of the first cavity is smaller than the diameter of the second cavity. A groove is uniformly formed axially on the end face of the housing near the top cover. The depth of the groove is less than the axial length of the first cavity, and the groove is connected to the first cavity... The body is connected. The groove sidewall has a hole from the inside to the outside along the radial direction. One end of the spring seat block is placed in the hole, and the other end is fitted with a spring. The other end of the spring is placed in the spring hole on the clamping block. The clamping block has a hemispherical structure, and the spring hole is located on the flat end. The top sleeve is placed in the second cavity. The top sleeve has a through hole one in the center. The base has a boss structure and a through hole two in the center. One end of the top sleeve has an external thread that is threaded to the internal thread of the small diameter end of the base. The other end of the top sleeve has a groove evenly opened along the axial direction. A convex ring is provided on the outside of the top sleeve, avoiding the groove. The side of the convex ring contacts the end face of the small diameter end of the base. The end of the top sleeve away from the base is placed in the first cavity and avoids the clamping block. The mounting hole is connected to the first cavity, the second cavity, the through hole one, and the through hole two.

[0005] Furthermore, the groove is provided in three parts.

[0006] Furthermore, the slots are provided in four places.

[0007] Furthermore, the top cover and top sleeve can be replaced according to the specifications of the structural components.

[0008] The top cover is connected to the housing by threads, serving to fix the other parts. The housing has three grooves for installing clamping blocks, and the side walls of the grooves also have through holes for installing spring seat blocks, connecting and fixing the springs to the housing. The clamping blocks have spring holes inside for installing springs and guides, and are fixed to the housing by the springs. The bottom of the top sleeve has threads for connecting to the base. The top sleeve has slots and is elastic through the process of closing the opening, which restricts the passage of the slotted bushing while allowing the mandrel to pass through. The base has threads for connecting to the housing.

[0009] A method for using a pre-installation tool for slotted bushings includes the following steps:

[0010] Step S1: First, replace the top sleeve and top cover parts of the corresponding specifications.

[0011] Step S2: Insert the slotted bushing into the slotted bushing pre-installation tool through the top cover mounting hole. Step S3: Press the mandrel downwards through the top cover mounting hole to complete the installation of the mandrel slotted bushing.

[0012] The beneficial effects of this invention are:

[0013] (1) The installation of multi-specification slotted bushings can be achieved by replacing the corresponding specified parts of the slotted bushing.

[0014] (2) The pre-installation tool has a compact structure and is easy to operate, which can effectively improve the installation efficiency of the slotted bushing. It takes about 10 to 20 seconds to install a slotted bushing without using the pre-installation tool, and about 4 to 10 seconds to install a slotted bushing with the pre-installation tool. The overall calculation efficiency will be doubled.

[0015] (3) Using installation tools can effectively avoid the risk of the operator's hand being scratched by the sharp edge of the slit bushing due to manual operation.

[0016] (4) The internal force is borne by the straight edge of the slotted bushing, thus minimizing the damage that may occur after the slotted bushing is installed. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0018] Figure 1 A schematic diagram of the pre-assembly tool for the slotted bushing provided by the present invention;

[0019] Figure 2 A cross-sectional view of the pre-assembly tool for the slotted bushing provided by the present invention in the AA direction;

[0020] Figure 3 A cross-sectional view of the housing along the AA direction provided for this invention;

[0021] Figure 4 This is a schematic diagram of the clamping block structure provided by the present invention;

[0022] Figure 5 Assembly diagram of step S1 in the method of using the pre-assembly tool for the slotted bushing provided by the present invention.

[0023] Figure 6 Assembly diagram of step S2 in the method of using the pre-assembly tool for the slotted bushing provided by the present invention.

[0024] Figure 7 Assembly diagram of step S3 in the method of using the pre-assembly tool for the slotted bushing provided by the present invention.

[0025] In the attached diagram: 1-top cover, 11-mounting holes.

[0026] 2-Spring

[0027] 3-Clamping block, 31-Spring hole

[0028] 4-Top sleeve, 41-Through hole one, 42-Slot, 43-Protruding ring

[0029] 5-Shell, 51-First cavity, 52-Second cavity, 53-Groove, 531-Hole

[0030] 6-Base, 61-Through Hole Two

[0031] 7-Spring seat block Detailed Implementation

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the invention will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0033] Please see Figure 1The figure shows a schematic diagram of the non-metallic flexible pipe joint structure provided by the present invention, which consists of a top cover 1, a spring 2, a clamping block 3, a top sleeve 4, a shell 5, a base 6, and a spring seat block 7. The top cover 1 has an annular cavity structure design, with a mounting hole 11 at one end and an internal thread on the inner side of the other end that engages with the external thread at one end of the shell 5. The size of the mounting hole 11 must match the size of the slotted bushing to allow the mandrel to pass through. The mounting hole 11 serves to fix the slotted bushing during installation. The shell 5 has a cylindrical hollow structure, with an internal thread on the inner side of the other end that engages with the external thread at one end of the base 6. The inner side of the shell 5 forms a first cavity 51 and a second cavity 52 that are connected. The cross-sectional diameter of the first cavity 51 is smaller than that of the second cavity 52. ​​Three grooves 53 are evenly formed axially on the end face of the shell 5 near the top cover 1, and the depth of the grooves 53 is less than the axial depth of the first cavity 51. The length is such that the groove 53 is connected to the first cavity 51. The side wall of the groove 53 has a hole 531 arranged radially from the inside to the outside. One end of the spring seat block 7 is placed in the hole 531, and the other end is fitted with a spring 2. The other end of the spring 2 is placed in the spring hole 31 provided on the clamping block 3. The clamping block 3 has a hemispherical structure, and the spring hole 31 is provided at the flat end. The top sleeve 4 is placed in the second cavity 52. ​​The top sleeve 4 has a through hole 41 at its center. The base 6 has a boss structure and a through hole 61 at its center. One end of the top sleeve 4 has an external thread that is threaded to the internal thread provided at the small diameter end of the base 6. The other end of the top sleeve 4 has four grooves 42 evenly opened along the axial direction. The outer side of the top sleeve 4 has a convex ring 43 that contacts the end face of the small diameter end of the base 6. The end of the top sleeve 4 away from the base 6 is placed in the first cavity 51 and avoids the clamping block 3. The mounting hole 11 is connected to the first cavity 51, the second cavity 52, the through hole 41, and the through hole 61. Top cover 1 and top sleeve 4 can be replaced according to the specifications of the structural components.

[0034] The top cover 1 is connected to the housing 5 by threads, serving to fix the other parts. The housing 5 has three grooves 53 for installing the clamping block 3. The side wall of the groove 53 also has holes 531 for installing the spring seat block 7. The spring 2 is connected and fixed to the housing 5. The clamping block 3 is placed in the groove 53. The side walls of the clamping block 3 restrict the left and right displacement of the clamping block 3. At the same time, the side walls of the housing guide the clamping block. The clamping block 3 has a spring hole 31 inside for installing the spring 2 and for guiding. The spring 2 is fixed to the housing 5. The spring 2 is placed between the housing 5 and the clamping block 3 for the movement and reset of the clamping block 3. The bottom of the top sleeve 4 has threads for connecting to the base 6. The top sleeve 4 has a slot 42 and has a certain elasticity through the process of closing the opening. While restricting the passage of the slotted bushing, the core rod can pass through. The base 6 has threads for connecting and fixing to the housing 5.

[0035] A method for using a pre-installation tool for slotted bushings includes the following steps:

[0036] like Figure 5 As shown, in step S1, the corresponding specification of the top sleeve part and top cover part are replaced and matched with the size of the slotted bushing, which can be the mandrel passing through;

[0037] like Figure 6 As shown, in step S2, the slotted bushing is inserted into the slotted bushing pre-installation tool through the top cover mounting hole.

[0038] like Figure 7 As shown, in step S3, the mandrel is pressed down through the mounting hole of the top cover to complete the installation of the mandrel slotted bushing. The top bushing has threads and grooves, and after the process is closed, it has a certain elasticity. During the downward movement of the mandrel, it can basically fit against the inner wall of the mandrel.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, are all covered within the scope of the claims of the present invention.

Claims

1. A pre-assembly tool for slotted bushings, characterized in that: It consists of a top cover (1), a spring (2), a clamping block (3), a top sleeve (4), a housing (5), a base (6), and a spring seat block (7). The top cover (1) has an annular cavity structure with a mounting hole (11) at one end and an internal thread at the other end that engages with the external thread at one end of the housing (5). The size of the mounting hole (11) must match the size of the slotted bushing. The housing (5) has a cylindrical hollow structure. The internal thread at the other end of the housing (5) engages with the external thread at one end of the base (6). The housing (5) is connected to form a first cavity (51) and a second cavity (52) on its inner side. The diameter of the first cavity (51) is smaller than the diameter of the second cavity (52). Several grooves (53) are evenly provided axially on the end face of the housing (5) near the top cover (1). The depth of the grooves (53) is less than the axial length of the first cavity (51), and the grooves (53) are connected to the first cavity (51). Holes (531) are provided radially from the inside to the outside on the side wall of the grooves (53). The spring seat One end of the block (7) is placed in the hole (531), and the other end is fitted with a spring (2). The other end of the spring (2) is placed in the spring hole (31) provided on the clamping block (3). The clamping block (3) has a hemispherical structure, and the spring hole (31) is provided on the flat end. The top sleeve (4) is placed in the second cavity (52). The top sleeve (4) has a through hole one (41) in the center. The base (6) has a boss structure and a through hole two (61) in the center. One end of the top sleeve (4) is provided with an external thread that mates with the internal thread provided on the small diameter end of the base (6). The top sleeve (4) is threaded and has a groove (42) evenly provided on the other end along the axial direction. A convex ring (43) is provided on the outer side of the top sleeve (4). The convex ring (43) contacts the small diameter end face of the base (6). The end of the top sleeve (4) away from the base (6) is placed in the first cavity (51) and avoids the clamping block (3). The mounting hole (11) is connected to the first cavity (51), the second cavity (52), the first through hole (41), and the second through hole (61). The top cover (1) and the top sleeve (4) can be replaced according to the specifications of the structural components.

2. The pre-assembly tool for the slotted bushing according to claim 1, characterized in that: The groove (53) is provided in three places.

3. The pre-assembly tool for the slotted bushing according to claim 1, characterized in that: The slot (42) has four.

4. A method of using a pre-assembly tool based on the slotted bushing according to any one of claims 1-3, characterized in that... Includes the following steps: Step S1: First, replace the top sleeve and top cover parts of the corresponding specifications. Step S2: Insert the slotted bushing into the slotted bushing pre-installation tool through the top cover mounting hole. Step S3: Press the mandrel downwards through the mounting hole in the top cover to complete the installation of the mandrel slotted bushing.

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