A crimp nut seat structure

Abstract

A crimp-type nut seat structure includes a crimp bolt with an assembly hole and a nut seat with an inner hole. One end of the inner hole has an annular rigid cap. The nut seat has a bent portion corresponding to the other end of the inner hole, curving inwards towards the inner hole. The bent portion has an inner ring extending towards the rigid cap. The inner circumferential wall of the inner ring has internal threads. The crimp bolt has external threads and is screwed into the inner side of the inner ring, forming a crimping area between the crimp bolt and the rigid cap for crimping the workpiece. This solution not only effectively fixes the end of the workpiece using the crimp bolt but also effectively seals the end face of the workpiece using the nut seat and rigid cap. Furthermore, the bent portion of the nut seat allows the inner ring to deform relative to the nut seat, enabling an interference fit between the crimp bolt and the inner ring, ensuring a tighter connection.

Description

Technical Field

[0001] The technical field of this utility model specifically relates to a press-fit nut seat structure. Background Technology

[0002] A differential pressure line is a specialized pipeline device used to measure the pressure difference of fluids. It is commonly used in engine intake systems, exhaust systems, and other applications. Its core function is to optimize engine performance or control emissions by measuring the pressure difference between the two ends.

[0003] To facilitate maintenance and disassembly, differential pressure pipes are typically equipped with external threads at their ends. During installation, a nut is fitted onto the end of the pipe to secure it in place. However, while conventional nuts can achieve a threaded connection, a gap remains between the pipe end and the installation location, affecting sealing performance. Utility Model Content

[0004] The purpose of this invention is to solve the problem that although nuts can securely fasten the end of differential pressure tubes in the prior art, there is still an assembly gap between the end of the differential pressure tubes and the installation position, which affects the sealing performance.

[0005] To address the aforementioned problems, this utility model provides a press-fit nut seat structure, comprising a press-fit bolt with an assembly hole and a nut seat with an inner hole. One end of the inner hole is provided with an annular rigid cap. The nut seat has a bent portion that bends towards the inner hole at the position corresponding to the other end of the inner hole, and the bent portion has an inner sleeve extending towards the rigid cap. The inner circumferential wall of the inner sleeve is provided with an internal thread. The press-fit bolt has an external thread and is used to screw into the inner side of the inner sleeve, so that a press-fit area for pressing the workpiece is formed between the press-fit bolt and the rigid cap.

[0006] When differential pressure pipes and other workpieces need to be installed, the end of the workpiece is first inserted into the inner sleeve from the bent end of the nut seat until the end of the workpiece abuts against the rigid cap. Then, the crimping bolt fitted on the workpiece is screwed into the inner sleeve from the bent end of the nut seat until the end of the workpiece is crimped in the crimping area between the crimping bolt and the rigid cap. Compared with the prior art, the above solution not only achieves effective fixing of the end of the workpiece through the crimping bolt and the rigid cap, but also achieves effective sealing of the end of the workpiece through the nut seat and the rigid cap. At the same time, due to the presence of the bent part of the nut seat, the inner sleeve has a certain deformation capacity relative to the nut seat, so that the crimping bolt and the inner sleeve can be interference-fitted, ensuring a tighter connection between the crimping bolt and the inner sleeve.

[0007] In an improved embodiment, the radial cross-section of the bend has an arched structure, thereby reducing the internal stress during deformation of the bend and avoiding stress concentration.

[0008] In an improved embodiment, after the crimping bolt is screwed into the inner side of the inner sleeve, the crimping bolt and the rigid cap abut against both sides of the end boss of the workpiece, thereby achieving effective locking and sealing of the workpiece.

[0009] In an improved embodiment, the rigid cap is connected to the nut seat by welding, resulting in a reliable connection and good sealing performance. Attached Figure Description

[0010] Figure 1 This is a schematic cross-sectional view of a press-fit nut seat structure. Figure 2 This is a schematic cross-sectional view of a nut seat with a press-fit nut seat structure; Figure 3 This is a schematic diagram of a press-fit nut seat structure; Figure 4 This is a schematic diagram of the fit between a press-fit nut seat structure and a workpiece.

[0011] Explanation of reference numerals in the attached figures. 1. Crimping bolt; 11. Assembly hole; 2. Nut seat; 21. Inner hole; 22. Bend; 23. Inner collar; 3. Rigid cap; 4. Crimping area. Detailed Implementation

[0012] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0013] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0014] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0015] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Please see Figures 1-4 The present invention provides a crimping nut seat structure, including a crimping bolt 1 with an assembly hole 11 and a nut seat 2 with an inner hole 21. One end of the inner hole 21 is provided with an annular rigid cap 3. The nut seat 2 has a bent portion 22 that bends toward the inner hole 21 at the position corresponding to the other end of the inner hole 21, and the bent portion 22 has an inner sleeve 23 extending toward the rigid cap 3. The inner circumferential wall of the inner sleeve 23 is provided with an internal thread. The crimping bolt 1 has an external thread and is used to screw into the inner side of the inner sleeve 23, so that a crimping area 4 for crimping the workpiece is formed between the crimping bolt 1 and the rigid cap 3.

[0017] In this embodiment, the workpiece is a differential pressure pipe, such as... Figure 4 As shown, the differential pressure tube has an outward-facing boss at its end, and the crimping bolt 1 is fitted onto the differential pressure tube through the assembly hole 11. When the differential pressure tube or other workpieces need to be installed, first insert the end of the workpiece into the inner sleeve 23 from the end of the nut seat 2 with the bent portion 22 until the end of the workpiece abuts against the rigid cap 3. Then, screw the crimping bolt 1 fitted onto the workpiece into the inner sleeve 23 from the end of the nut seat 2 with the bent portion 22 until the end of the workpiece is crimped between the crimping bolt 1 and the rigid cap 3. Within the contact area 4; compared with the prior art, the above solution not only achieves effective fixing of the workpiece end through the crimping bolt 1 and the rigid cover 3, but also achieves effective sealing of the workpiece end through the nut seat 2 and the rigid cover 3; at the same time, due to the existence of the bent part 22 of the nut seat 2, the inner sleeve 23 has a certain deformation capacity relative to the nut seat 2, so that the crimping bolt 1 and the inner sleeve 23 can be interference fit, ensuring a tighter connection between the crimping bolt 1 and the inner sleeve 23.

[0018] In this embodiment, the radial cross-section of the bent portion 22 has an arched structure, thereby reducing the internal stress when the bent portion 22 deforms and avoiding stress concentration.

[0019] In this embodiment, after the crimping bolt 1 is screwed into the inner side of the inner sleeve 23, the crimping bolt 1 and the rigid cap 3 abut against the two sides of the end boss of the workpiece, thereby achieving locking and sealing.

[0020] In this embodiment, the rigid cap 3 is connected to the nut seat 2 by welding, which ensures a reliable connection and good sealing performance.

[0021] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications such as up, down, left, right, front, back, inner, and outer are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0023] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A press-fit nut seat structure, characterized in that, The device includes a crimping bolt (1) with an assembly hole (11) and a nut seat (2) with an inner hole (21). One end of the inner hole (21) is provided with an annular rigid cap (3). The nut seat (2) has a bend (22) at the other end of the inner hole (21) that bends toward the inner hole (21). The bend (22) has an inner collar (23) extending toward the rigid cap (3). The inner circumferential wall of the inner collar (23) is provided with an internal thread. The crimping bolt (1) has an external thread and is used to screw into the inner side of the inner collar (23) so that a crimping area (4) for crimping the workpiece is formed between the crimping bolt (1) and the rigid cap (3).

2. The press-fit nut seat structure according to claim 1, characterized in that, The radial cross-section of the bent portion (22) has an arched structure.

3. The press-fit nut seat structure according to claim 1 or 2, characterized in that, After the crimping bolt (1) is screwed into the inner side of the inner sleeve (23), the crimping bolt (1) and the rigid cap (3) respectively abut against the two sides of the end boss of the workpiece.

4. The press-fit nut seat structure according to claim 1, characterized in that, The rigid cap (3) is connected to the nut seat (2) by welding.

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