Nut port riveting forming tool

Abstract

The application provides a nut port riveting forming tool, which comprises a shell main body with a stepped hole structure penetrating through the inside, an elastic compression component and a guide component correspondingly arranged in the stepped hole, the guide component being used to guide the movement of the elastic compression component; a pressure flange is detachably arranged at one end of the shell main body, the pressure flange being connected with a pressure device; one end of the elastic compression component away from the pressure flange is a multi-limb split structure, and the end thereof forms an inner counterbore, the elastic compression component is controlled to move by an adjusting lever rod arranged on the shell main body, so that the inner counterbore clamps and holds a riveting nut port; in response to the downward pushing of the pressure device, the shell main body moves downward, the inner counterbore shrinks, and the port of the riveting nut is attached to the end of the stud. The nut port riveting forming tool can realize one-time forming of the port of the riveting nut and has stable shape, consistent riveting form, good anti-loosening effect and strong uniformity of the group of nuts.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of mechanical assembly, and particularly relates to a nut port riveting forming tool. BACKGROUND

[0002] The stud and nut combination is a common means for connecting and fastening components, and the components are usually subjected to complex loads such as tension, shear, vibration and the like during work. The complex loads can cause the stud and nut to have pre-tightening force attenuation, nut loosening and fastening failure, thereby causing unpredictable mechanical failure of the connected components. Therefore, the anti-loosening and fastening of the stud and nut is a key link in the mechanical assembly process. The current methods for nut anti-loosening include glue coating, special-shaped gasket stop, steel wire interlocking and the like. The above anti-loosening operation process has the advantages of simple process, convenient operation, flexible site and suitability for manual operation, but has the disadvantages of poor process consistency of the group of nuts, low assembly efficiency, disadvantage for machine operation, increased quality of the combination and only meeting the non-critical fastening and anti-loosening requirement. SUMMARY

[0003] Therefore, the application aims to provide a nut port riveting forming tool to solve the problems of poor process consistency of the group of nuts, low assembly efficiency, disadvantage for machine operation and increased quality of the combination.

[0004] To achieve the above object, the technical scheme of the application is as follows:

[0005] The application provides a nut port riveting forming tool, which comprises:

[0006] a shell main body, an elastic compression component, a guide component, an adjusting lever and a pressure flange;

[0007] The shell main body is a stepped hole structure penetrating the inside, the elastic compression component and the guide component are correspondingly arranged in the stepped hole, the elastic compression component is movable along the stepped hole, and the guide component is used to guide the movement of the elastic compression component;

[0008] The pressure flange is detachably arranged at one end of the shell main body, a cavity is formed between the pressure flange and the shell main body to reserve space for the movement of the elastic compression component, and the pressure flange is connected with a pressure device;

[0009] One end of the elastic compression component away from the pressure flange is a multi-limb split structure, and an inner counterbore is formed at the end thereof, the adjusting lever arranged on the shell main body is used to control the action of the elastic compression component, so that the inner counterbore clamps the riveting nut port;

[0010] In response to the downward movement of the shell main body pushed by the pressure device, the inner counterbore is contracted, and the port of the riveting nut is attached to the end of the stud.

[0011] Further, the stepped hole is a tapered hole away from the end of the pressure flange;

[0012] The elastic pressing member comprises an elastic pressing buckle, a reset spring and a blind hole nut. The elastic pressing buckle is hollow inside, and gaps are reserved on the elastic pressing buckle in a spaced manner to form a multi-petal split structure. The outer wall surface of each petal elastic pressing buckle is a conical surface and is fitted with a tapered hole surface formed on the shell body. The end of each petal elastic pressing buckle extends outwardly and has a protruding part. The multi-petal protruding parts surround to form an inner counterbore.

[0013] The end of the elastic pressing buckle close to the pressure flange is threadedly connected with the blind hole nut. The blind hole nut is located in the cavity. The outer extension part of the blind hole nut is provided with the reset spring between the guide member.

[0014] Further, a threaded hole is arranged in the end of the shell body close to the pressure flange.

[0015] The guide member comprises a guide screw block. The guide screw block is threadedly connected with the threaded hole to connect the guide screw block with the shell body and be arranged on the shoulder in the shell body.

[0016] The elastic pressing buckle is arranged in the shaft hole formed in the middle of the guide screw block.

[0017] Further, an inner recess groove is reserved on the guide screw block to accommodate the reset spring. The reset spring is sleeved on the elastic pressing buckle.

[0018] Further, a control window is formed on the side wall of the shell body.

[0019] The adjusting lever is arranged in the control window and is connected with the middle protrusion of the elastic pressing buckle.

[0020] Further, a flange connection interface is arranged at the end of the shell body away from the riveting nut.

[0021] The pressure flange is a counterbore structure. Threaded holes are arranged around the end of the pressure flange. The fastening bolt passes through the threaded holes to connect the pressure flange with the shell body. Through holes are arranged around the end of the pressure flange away from the shell body to connect with the pressure equipment.

[0022] Compared with the prior art, the nut port riveting forming tool has the following beneficial effects:

[0023] The nut port riveting forming tool adopts a press machine loading and flange connection, which is light and flexible in loading and movement. The elastic pressing buckle is integrally cut and formed, which is accurate in position and consistent in shape. The nut port structure is soft in stress in all directions, and the surface is uniformly loaded. The nut port is one-time formed and stable in shape, the riveting form is consistent, the anti-loose effect is good, and the group of nuts is strong in uniformity. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a cross-sectional view of the nut port riveting forming tooling described in the embodiments of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Outer shell body; 2-Elastic snap fastener; 3-Adjusting lever; 4-Guide screw block; 5-Reset spring; 6-Blind hole nut; 7-Pressure flange; 8-Fastening bolt; 9-Rivet nut. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Please see Figure 1 As shown, this embodiment provides a nut end riveting forming fixture, including:

[0031] 1. Outer shell body, elastic clamping component, guide component, adjusting lever 3 and pressure flange 7;

[0032] The outer shell body 1 has an internal stepped hole structure. The elastic pressing component and the guide component are respectively set in the stepped hole. The elastic pressing component can move along the stepped hole, and the guide component is used to guide the movement of the elastic pressing component.

[0033] The pressure flange 7 is detachably arranged at one end of the shell body 1, and a cavity is formed between the pressure flange 7 and the shell body 1 to reserve space for the elastic compression member to move, and the pressure flange 7 is connected with the pressure equipment;

[0034] The end of the elastic compression member away from the pressure flange 7 is a multi-limb structure, and the end thereof is formed with an inner counterbore, and the elastic compression member is controlled to act by the adjusting lever 3 arranged on the shell body 1 to make the inner counterbore clamp the port of the riveting nut 9;

[0035] In response to the pressure equipment pushing the shell body 1 downward, the inner counterbore is contracted, and the port of the riveting nut 9 is combined with the end of the stud.

[0036] Specifically, in the embodiment, the square end of the stud and the riveting of the nut counterbore are a special anti-loose combination structure, which is suitable for permanent combination anti-loose design of key moving parts, such as mechanical combination structure of steel top aluminum group piston, and the operation process needs to meet the requirements of quality control, forming specification, anti-loose reliability, etc.

[0037] The embodiment can be applied to studs and nuts in the form of four squares, six squares, etc., and the following content of the embodiment is only explained and described by taking the port of the nut as a four-square form and the end of the stud as a square as an example:

[0038] The riveting forming tool of the nut port is based on the above requirements and utilizes a conical bearing pressure surface to push the elastic four-square compression buckle member to rivet and form the nut counterbore structure part according to the four-square form of the square end of the fastening stud, the outside of the nut counterbore is soft in each direction, the surface is uniformly loaded, the port is uniformly deformed, the riveting form is complete, the repeatability is good, the anti-loose reliability is high, the uniformity is strong, and it can meet the basic requirements of the stud and nut anti-loose fastening of key parts such as moving parts under specific environments, strict quality requirements, reliable anti-loose performance, and consistent structure shape.

[0039] The riveting forming tool of the nut port in the embodiment adopts a press machine loading and a flange connection, which is light in loading and flexible in movement; the elastic compression buckle 2 is integrally cut and formed, the position is accurate, the shape is consistent, the nut port structure is soft in each direction, the surface is uniformly loaded, the nut port is one-time formed and the shape is stable, the riveting form is consistent, the anti-loose effect is good, and the group of nuts is uniform.

[0040] In some embodiments, the stepped hole is a tapered hole at the end away from the pressure flange 7;

[0041] The elastic pressing member comprises an elastic pressing buckle 2, a reset spring 5 and a blind hole nut 6. The elastic pressing buckle 2 is hollow inside, and gaps are reserved on the elastic pressing buckle 2 in a spaced arrangement to form a multi-limb split structure. The outer wall surface of each limb of the elastic pressing buckle 2 is a conical surface and is fitted to a conical hole surface formed on the outer shell body 1. The end of each limb of the elastic pressing buckle 2 extends outwardly with a protruding portion, and the multi-limb protruding portions enclose an inner counterbore.

[0042] The elastic pressing buckle 2 is threadedly connected with the blind hole nut 6 at one end close to the pressure flange 7. The blind hole nut 6 is located in the cavity, and the outer extension portion of the blind hole nut 6 is provided with the reset spring 5 between the guiding member.

[0043] The lower end of the elastic pressing buckle 2 is a conical structure, and a square counterbore is formed at the head protruding portion. The conical structure is divided into four parts by equal division, and each part maintains a part of the conical surface and one side of the square hole. The four parts are connected to the protruding structure at the other end of the elastic pressing buckle 2 through the wall of the hollow tube in the middle of the elastic pressing buckle 2. The conical structure of the four parts can be combined into a complete conical structure, and the square counterbore at the end can also be combined into a square hole. The conical surface of the elastic pressing buckle 2 is fitted to the conical hole surface of the outer shell body 1.

[0044] The other side of the elastic pressing buckle 2 is gap-fitted to the guide screw block 4 to ensure stable up-and-down movement of the elastic pressing buckle 2 during work. Threaded structure is arranged at the upper end of the elastic pressing buckle 2 to cooperate with the blind hole nut 6. Through the rebounding action of the reset spring 5, the conical surface of the elastic pressing buckle 2 is stably fitted during non-working period. The adjustment lever 3 is installed at the middle protruding portion of the elastic pressing buckle 2. The staff can push the elastic pressing buckle 2 downward to open the square counterbore by using the adjustment lever 3, which facilitates the clamping of the riveting nut 9 and prepares for the subsequent riveting work of the nut.

[0045] It should be noted that the elastic pressing buckle 2 is connected with the surface of the shaft hole of the outer shell body 1 and the guide screw block 4 in cooperation, and lubricating oil is needed for auxiliary lubrication.

[0046] Specifically, the outer shell body 1 is an internal stepped hole structure. A window for inserting the adjustment lever 3 is formed on the outer wall of the outer shell body 1 and corresponds to the middle protruding portion of the elastic pressing buckle 2. A flange connection interface is arranged at the upper part of the outer shell body 1, and a fastening bolt 8 is used to connect with the pressure flange 7. The pressure flange 7 is a counterbore structure, and through holes are distributed at the bottom circumference for connecting with pressure equipment. Threaded holes are distributed at the end circumference for connecting with the outer shell body 1. The combination of the outer shell body 1 and the pressure flange 7 forms an inner cavity structure, and the height of the inner cavity structure meets the space requirement of the elastic pressing buckle 2. Threaded structure is arranged on the outside of the guide screw block 4 for connecting with the outer shell body 1. A guide hole and a top hexagonal counterbore are formed in the middle of the guide screw block 4. The hexagonal counterbore is connected with the external pressure equipment through a connecting bolt. The bottom of the guide screw block 4 is a flat structure for positioning and limiting the reset spring 5. The corresponding combination of the components realizes the riveting forming tool with the riveting function of the nut port.

[0047] The working principle of the tooling is:

[0048] The nut port square riveting forming device has the characteristics of pressure equipment pressure, slow process, rivet shape specification, convenient operation, etc. Its working principle is to install the device on the pressure equipment, use the adjusting lever 3 to push down the elastic pressure buckle 2, open the thin-walled port of the riveting nut 9 square counterbore clamp; start the pressure equipment to press, push the outer shell main body 1 to move downward; under the action of pressure, the square counterbore on the combined cone of the elastic pressure buckle 2 shrinks, gradually makes the riveting nut 9 orifice cylinder bear pressure, until its inner hole and the square head of the stud are closely fitted, and is formed under the extrusion of the round angle at the bottom of the square counterbore.

[0049] When disassembling, cancel the equipment loading force, relax the square counterbore contact force, push up the elastic pressure buckle 2 of the adjusting lever 3, and under the action of the reset spring 5, the elastic pressure buckle 2 automatically retreats to the original position of the outer shell main body 1, and the riveting work of the nut port is successfully completed.

[0050] The device has small and convenient overall structure, the pressure flange 7 is designed to adapt to the connection of various electric or hydraulic presses, is simple to install, is flexible and portable in various field applications, and has low labor intensity.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

[0052] The embodiments of the present application are intended to cover all such replacements, modifications and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A tooling for riveting and forming a nut end, characterized in that, include: The outer casing (1), elastic clamping component, guide component, adjusting lever (3), and pressure flange (7); The outer shell body (1) is a stepped hole structure with internal penetration. The elastic pressing component and the guide component are respectively set in the stepped hole. The elastic pressing component can move along the stepped hole, and the guide component is used to guide the movement of the elastic pressing component. The pressure flange (7) is detachably installed at one end of the housing body (1). A cavity is formed between the pressure flange (7) and the housing body (1) to reserve space for the movement of the elastic clamping member. The pressure flange (7) is connected to the pressure equipment. The end of the elastic clamping member away from the pressure flange (7) is a multi-lobed split structure, and its end forms an inner countersunk hole. The elastic clamping member is operated by the adjustment lever (3) set on the outer shell body (1) so that the inner countersunk hole locks the port of the riveting nut (9). In response to the downward pressure of the pressure device, the outer casing (1) moves downward, the inner countersunk hole contracts, and the port of the rivet nut (9) fits into the stud end; The end of the stepped hole away from the pressure flange (7) is a tapered hole; The elastic clamping component includes an elastic buckle (2), a return spring (5), and a blind hole nut (6). The elastic buckle (2) is hollow inside, and there are gaps arranged at intervals on the elastic buckle (2) to form a multi-lobed split structure. The outer wall surface of each elastic buckle (2) is a conical surface and fits with the conical hole surface opened on the outer shell body (1). The ends of each elastic buckle (2) extend outward with protrusions, and the multiple protrusions surround to form an inner recessed hole. The end of the elastic buckle (2) near the pressure flange (7) is threaded with a blind hole nut (6). The blind hole nut (6) is located in the cavity. A return spring (5) is provided between the outer extension of the blind hole nut (6) and the guide member.

2. The nut end riveting forming fixture according to claim 1, characterized in that: The outer casing (1) has a threaded hole at one end near the pressure flange (7); The guide component includes a guide screw block (4), which is threadedly engaged with a threaded hole to connect the guide screw block (4) to the outer shell body (1) and is located on a shoulder provided inside the outer shell body (1); The elastic snap fastener (2) is located in the shaft hole opened in the middle of the guide screw block (4).

3. The nut end riveting forming fixture according to claim 2, characterized in that: The guide screw block (4) has a pre-drilled groove for mounting the reset spring (5), and the reset spring (5) is fitted onto the elastic buckle (2).

4. The nut end riveting forming fixture according to claim 1, characterized in that: An operating window is provided on the side wall of the outer shell (1); The adjustment lever (3) is located within the control window and is connected to the central protrusion of the elastic buckle (2).

5. The nut end riveting forming fixture according to claim 1, characterized in that: A flange connection interface is provided at the end of the outer shell body (1) away from the rivet nut (9); The pressure flange (7) has a countersunk hole structure and threaded holes are provided around its end. Fastening bolts (8) pass through the threaded holes to connect the pressure flange (7) to the housing body (1). The end of the pressure flange (7) away from the housing body (1) has through holes around its circumference for connecting to pressure equipment.

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