A connecting device
By incorporating a combination of optical holes and threaded holes in the connecting device, the problem of unstable connections in confined spaces is solved, enabling high-precision connection operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU WATERSINE ELECTRONIC TECH CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-30
AI Technical Summary
Existing connection devices cannot effectively connect in confined spaces and cannot meet assembly accuracy requirements. In particular, bolts are difficult to fix or fall off in confined operating spaces, resulting in unstable connections.
A connecting device is designed, wherein a first threaded hole and a first smooth hole are provided on a first part to be connected, and a second threaded hole and a second smooth hole are provided on a second part to be connected. The length of the threaded shank of the bolt is less than or equal to the sum of the lengths of the two smooth holes. The connection is achieved by pre-screwing into the first threaded hole and tightening it with an extension tool, thus avoiding insufficient assembly accuracy of the double threaded hole connection.
Stable connections were achieved in confined spaces, improving assembly accuracy, ensuring bolts did not fall out in confined spaces, and simplifying the operation process.
Smart Images
Figure CN224433043U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical and electronic technology, and in particular to a connecting device. Background Technology
[0002] In the machinery and electronics industries, detachable connections are often required between two components. However, as products become increasingly smaller, the operating space at the connection points becomes increasingly limited, and the requirements for assembly precision become increasingly stringent.
[0003] Existing connection devices are not suitable for connection scenarios in confined spaces and cannot meet assembly precision requirements. Utility Model Content
[0004] The purpose of this invention is to provide a connecting device to solve at least one of the technical problems in the prior art.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] A connecting device includes a first component to be connected, a second component to be connected, and a bolt. The first component to be connected has a first threaded hole, and a first open hole is provided at one end of the first threaded hole near the second component to be connected. The second component to be connected has a second threaded hole. The bolt includes a threaded rod, the length of which is less than or equal to the sum of the lengths of the first open hole and the second threaded hole.
[0007] Furthermore, a second light hole is provided at the end of the second threaded hole near the first component to be connected, and the length of the threaded rod is less than or equal to the sum of the lengths of the first light hole, the second threaded hole, and the second light hole.
[0008] Furthermore, the length of the threaded rod is less than or equal to the sum of the lengths of the second threaded hole and the second smooth hole.
[0009] Furthermore, the length of the threaded rod is less than or equal to the length of the second threaded hole.
[0010] Furthermore, a positioning element is provided between the first component to be connected and the second component to be connected.
[0011] This utility model has the following advantages:
[0012] The connecting device of this utility model has a first threaded hole on the first component to be connected. Before connecting the first component to be connected to the second component to be connected, the bolt is screwed into the first threaded hole. Without the aid of any tools, the bolt can be "fixed" to the first component to be connected, thus effectively solving the problem of not being able to put the bolt into the threaded hole in a narrow space. Then, the first clear hole is aligned with the second threaded hole, and the bolt is tightened with an extended bolt tightening tool to complete the connection between the first component to be connected and the second component to be connected. A gap area (i.e., the first clear hole) is set between the first threaded hole and the second threaded hole, and the length of the threaded rod is less than or equal to the sum of the lengths of the first clear hole and the second threaded hole, so that the threaded rod is already disengaged from the first threaded hole before being screwed into the second threaded hole. That is, the first component to be connected and the second component to be connected are only connected through the second threaded hole (i.e., single threaded hole connection), thus effectively avoiding the insufficiency of the double threaded hole connection method in meeting the assembly accuracy. Attached Figure Description
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0014] Figure 1 This is a three-dimensional schematic diagram of the connecting device of this utility model;
[0015] Figure 2 This is a cross-sectional schematic diagram of the connecting device of this utility model;
[0016] Figure 3 This is a schematic diagram of the disassembled connecting device of this utility model;
[0017] In the diagram: 1-First component to be connected; 2-Second component to be connected; 3-Bolt; 4-First threaded hole; 5-First smooth hole; 6-Second threaded hole; 7-Threaded rod; 8-Smooth rod; 9-Second smooth hole; 10-Positioning component. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0020] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0021] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0022] like Figures 1 to 3As shown, a connecting device includes a first connecting part 1, a second connecting part 2, and a bolt 3. The first connecting part 1 has a first threaded hole 4, and a first open hole 5 is provided at one end of the first threaded hole 4 near the second connecting part 2. The diameter of the first open hole 5 is larger than the outer diameter of the first threaded hole 4. The second connecting part 2 has a second threaded hole 6. The bolt 3 includes a threaded rod 7 (i.e., the threaded part) and an unthreaded rod 8 (i.e., the unthreaded part). The outer diameter of the threaded rod 7 is larger than the diameter of the unthreaded rod 8. The thread of the threaded rod 7 matches the thread of the first threaded hole 4 and the thread of the second threaded hole 6. The length of the threaded rod 7 is less than or equal to the first threaded hole 4. The sum of the lengths of the smooth hole 5 and the second threaded hole 6; Scenario 1: When both the first connecting hole and the second connecting hole are threaded holes, although the bolt 3 can be pre-"fixed" on the first connecting hole, after assembly, the threaded rod is connected to both the threaded holes of the first and second connecting holes simultaneously (i.e., double threaded hole connection). If the coaxiality between the threaded holes of the first and second connecting holes is low, or / and the thread termination point of the first connecting hole and the thread termination point of the second connecting hole do not coincide well, it will inevitably lead to a gap or misalignment between the first and second parts to be connected, thus affecting the assembly accuracy; Scenario 2: When the first connecting hole is a smooth hole and the second connecting hole is a threaded hole... While threaded holes can overcome the shortcomings of the double-threaded hole connection method in scenario one, when the first connecting hole is in a narrow operating space in an inclined or vertical direction, the bolt may fall out of the first connecting hole and thus cannot be "fixed" to the first connecting hole in advance. The connecting device of this utility model has a first threaded hole 4 on the first part to be connected 1. Before connecting the first part to be connected 1 to the second part to be connected 2, the bolt 3 is first screwed into the first threaded hole 4. Regardless of whether the first threaded hole 4 is in a narrow operating space in an inclined or vertical direction, the bolt 3 can be "fixed" to the first part to be connected 1 without falling out. Then, the first open hole 5 is aligned with the second threaded hole 6, and the extended bolt is tightened. Tighten the bolt 3 with the tool to complete the connection between the first part to be connected 1 and the second part to be connected 2, thus effectively solving the problem of not being able to put the bolt into the threaded hole in the narrow space in the second scenario; and a first smooth hole 5 is set between the first threaded hole 4 and the second threaded hole 6, and the length of the threaded rod 7 is less than or equal to the sum of the lengths of the first smooth hole 5 and the second threaded hole 6, so that the threaded rod 7 is already disengaged from the first threaded hole 4 before being screwed into the second threaded hole 6, that is, the first part to be connected 1 and the second part to be connected 2 are connected only through the second threaded hole 6 (i.e., single threaded hole connection), thus effectively avoiding the insufficiency of the double threaded hole connection method in the first scenario in meeting the assembly accuracy.
[0023] Furthermore, the longer the thread, the greater the processing difficulty and error. Therefore, a second light hole 9 is provided at the end of the second threaded hole 6 near the first part to be connected 1. The diameter of the second light hole 9 is greater than the outer diameter of the second threaded hole 6, and the length of the threaded rod 7 is less than or equal to the sum of the lengths of the first light hole 5, the second threaded hole 6 and the second light hole 9.
[0024] Furthermore, the longer the threaded rod 7 is, the greater the processing difficulty and error will be. Therefore, the length of the threaded rod 7 is less than or equal to the sum of the lengths of the second threaded hole 6 and the second smooth hole 9.
[0025] Furthermore, in order to further reduce the machining difficulty of the threaded rod and / or improve its accuracy, the length of the threaded rod 7 is less than or equal to the length of the second threaded hole 6.
[0026] Furthermore, in order to facilitate the screwing of the bolt 3 into the second threaded hole 6 and improve the assembly accuracy between the parts to be connected, a positioning element 10 is also provided between the first part to be connected 1 and the second part to be connected 2; in some embodiments, the positioning element 10 may be a positioning pin.
[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A connecting device, comprising a first component to be connected (1), a second component to be connected (2), and a bolt (3), characterized in that: The first component to be connected (1) is provided with a first threaded hole (4), and the first threaded hole (4) is provided with a first smooth hole (5) at one end near the second component to be connected (2). The second component to be connected (2) is provided with a second threaded hole (6). The bolt (3) includes a threaded rod (7), and the length of the threaded rod (7) is less than or equal to the sum of the lengths of the first smooth hole (5) and the second threaded hole (6).
2. The connecting device according to claim 1, characterized in that: The second threaded hole (6) is provided with a second light hole (9) at one end near the first part to be connected (1). The length of the threaded rod (7) is less than or equal to the sum of the lengths of the first light hole (5), the second threaded hole (6) and the second light hole (9).
3. The connecting device according to claim 2, characterized in that: The length of the threaded rod (7) is less than or equal to the sum of the lengths of the second threaded hole (6) and the second smooth hole (9).
4. The connecting device according to any one of claims 1 to 3, characterized in that: The length of the threaded rod (7) is less than or equal to the length of the second threaded hole (6).
5. The connecting device according to claim 4, characterized in that: A positioning element (10) is also provided between the first component to be connected (1) and the second component to be connected (2).