A stud structure for absorbing tolerances

Abstract

The utility model discloses a stud structure for absorbing tolerances, and relates to the technical field of studs. In order to solve the problem that the existing stud structure mainly relies on the stud spiral part for fixing, when there is a large tolerance range in the mounting hole, it is easy to cause the stud spiral part to detach from the hole, affecting the overall stability. It includes: a first stud assembly, a second stud assembly is arranged inside the first stud assembly, the first stud assembly includes an expansion part located at the bottom, the expansion part is composed of a plurality of arc expansion pieces distributed in an annular manner, an opening is arranged at the center of the expansion part, the second stud assembly includes a ball head ejection part located at the bottom, the ball head ejection part is hemispherical, the second stud assembly expands and extends the arc expansion piece outward through the ball head ejection part, a stud spiral part is arranged at one end of the expansion part, and the expansion part is located at the lower bottom of the stud spiral part.

Description

Technical Field

[0001] The utility model relates to the technical field of studs, in particular to a stud structure for absorbing tolerance. Background Art

[0002] Studs are fasteners and one of the most basic and commonly used industrial parts. They are widely used in electric power, chemical industry, oil refining, valves, railways, bridges, steel structures, auto parts, machinery, boiler steel structures, tower cranes, large-span steel structures and large buildings.

[0003] For example, the public document: CN220869802U, named "A stud structure for absorbing tolerance", the adjustment part of the stud has an inner cavity, and the nut passes through the second plane of the bracket and is screwed into the inner cavity. The spiral part of the stud is screwed into the notch on the panel, and the bottom surface of the glass cover plate and the bottom surface of the front frame are at the same horizontal plane by adjusting the screwing depth of the spiral part. The stud structure has internal and external threads in opposite directions. The stud is installed on the display screen by pre-tightening the external threads first, and then the back limit plate is installed. The height of the stud is adjusted by reverse screwing the screw and the screw position is fixed to achieve the purpose of eliminating tolerance.

[0004] The above-mentioned existing stud structure mainly relies on the stud spiral part for fixation. When there is a large tolerance range in the installation hole, it is easy to cause the stud spiral part to detach from the hole, affecting the overall stability; therefore, it does not meet the existing needs. We have proposed a stud structure for absorbing tolerances. Utility Model Content

[0005] The utility model aims to provide a stud structure for absorbing tolerance, which eliminates the tolerance between the assembly hole and the stud through the combination of an expansion portion and a ball head ejection portion, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stud structure for absorbing tolerances, comprising: a first stud assembly, a second stud assembly is arranged inside the first stud assembly, the first stud assembly comprises an expansion portion located at the bottom, the expansion portion is composed of a plurality of arc-shaped expansion pieces distributed in an annular manner, an opening is arranged at the center of the expansion portion, the second stud assembly comprises a ball head ejection portion located at the bottom, the ball head ejection portion is hemispherical, and the second stud assembly expands and extends the arc-shaped expansion piece outward through the ball head ejection portion.

[0007] Preferably, a stud spiral portion is provided at one end of the expansion portion, and the expansion portion is located at the lower bottom of the stud spiral portion, a through hole is opened inside the stud spiral portion, and a thread matching the assembly hole is provided on the outer wall of the stud spiral portion.

[0008] Preferably, a combined mounting portion is provided at one end of the spiral portion of the stud away from the expansion portion, and an internal thread is provided on the inner wall of the combined mounting portion.

[0009] Preferably, a straight rod insertion portion is provided at one end of the ball head ejection portion, and the straight rod insertion portion is inserted into the stud spiral portion through a through hole.

[0010] Preferably, an end of the straight rod insertion portion away from the ball head ejection portion is provided with an external thread combination portion matching the internal thread, and the second stud assembly is fixed in the first stud assembly by a combination of the external thread combination portion and the internal thread.

[0011] Preferably, a limiting end portion is provided at one end of the external thread combination portion away from the straight rod insertion portion, and the size of the limiting end portion is larger than the upper opening of the combination mounting portion.

[0012] Preferably, a key groove is provided on the upper surface of the limiting end portion.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model can form an expandable portion at the bottom of the first stud assembly part and the second stud assembly part through the combination of the two. Through the partial structure, the tolerance part is eliminated, so that the stud and the assembly hole are tighter, and the two are detachable structures, which is convenient for users to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the expansion part structure of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the first stud assembly of the utility model;

[0018] Figure 4 It is a three-dimensional diagram of the second stud assembly of the utility model;

[0019] Figure 5 It is a cross-sectional view of the utility model;

[0020] Figure 6 It is a schematic diagram of the installation structure of the stud and the assembly hole of the utility model;

[0021] Figure 7 It is a schematic diagram of another installation structure of the stud and the assembly hole of the utility model;

[0022] In the figure: 1. first stud assembly; 2. second stud assembly; 3. combined mounting portion; 4. stud spiral portion; 5. expansion portion; 6. arc-shaped expansion piece; 7. internal thread; 8. limit end; 9. keyway; 10. external thread combination portion; 11. straight rod insertion portion; 12. ball head ejection portion. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1 , Figure 5 , Figure 6 The utility model provides an embodiment: a stud structure for absorbing tolerance, comprising: a first stud assembly 1, a second stud assembly 2 is arranged inside the first stud assembly 1, the first stud assembly 1 comprises an expansion portion 5 located at the bottom, the expansion portion 5 is composed of a plurality of arc expansion pieces 6 distributed in an annular manner, and an opening is arranged at the center of the expansion portion 5; after the second stud assembly 2 is assembled into the first stud assembly 1, it is tightened downward to drive the ball head ejection portion 12 below to move outward, and since the hemispherical structure has a certain curvature, after moving downward a certain distance, the wider curvature surface of the ball head ejection portion 12 will contact the arc expansion piece 6, so that the arc expansion piece 6 is pushed outward by the ball head ejection portion 12, thereby expanding and stretching the arc expansion piece 6 outward, so that the arc expansion piece 6 contacts the tolerance portion in the hole, and the two are pressed together, so as to restrict the bottom of the stud and the tolerance portion in the hole, so as to achieve the effect of eliminating the stud and the tolerance portion in the hole.

[0025] See also Figure 3 , Figure 4 , Figure 5 A stud spiral portion 4 is provided at one end of the expansion portion 5, and the expansion portion 5 is located at the lower bottom of the stud spiral portion 4, a straight rod insertion portion 11 is provided at one end of the ball head ejection portion 12, and a straight rod insertion portion 11 is provided at one end of the ball head ejection portion 12; the stud spiral portion 4 is an external thread assembly method, which is used to be fixedly installed in the assembly hole by a thread combination method, and a channel is provided inside for the straight rod insertion portion 11 to be inserted, and the ball head ejection portion 12 is located at the lower opening of the stud spiral portion 4, which is convenient for subsequent ejection operations.

[0026] See also Figure 3 , Figure 4 , Figure 5A combined mounting portion 3 is provided at one end of the stud spiral portion 4 away from the expansion portion 5, and an external threaded combined portion 10 matching the internal thread 7 is provided at one end of the straight rod insertion portion 11 away from the ball head ejection portion 12; an inner cavity is provided inside the combined mounting portion 3, and an internal thread 7 is provided on the inner wall of the cavity. The size of the external threaded combined portion 10 is smaller than that of the combined mounting portion 3, so that it can be installed in the cavity, and the internal thread 7 is tightened and fixed with the external thread of the external threaded combined portion 10, so as to achieve the effect of fixing the first stud assembly 1 and the second stud assembly 2 together.

[0027] See also Figure 4 A limiting end portion 8 is provided at one end of the external thread combination portion 10 away from the straight rod insertion portion 11, and a key groove 9 is provided on the upper surface of the limiting end portion 8; the limiting end portion 8 is used to play the role of top limiting, and because its size is larger than the upper opening of the combined mounting portion 3, it is limited above the combined mounting portion 3 during installation, which can facilitate the user to subsequently rotate the external thread combination portion 10 out of the inside through the limiting end portion 8; the setting of the key groove 9 can facilitate the user to insert a tool into the key groove 9, and then remove the external thread combination portion 10 from the inside by rotating it, so that the user can install and disassemble it conveniently.

[0028] Embodiment 1

[0029] The tolerance portion in the assembly hole is a protruding portion, and the second stud assembly part 2 does not completely extend into the first stud assembly part 1, and a portion of space is reserved at the top so that the ball head protruding part 12 slightly lifts the arc expansion piece 6 and presses it against the protruding portion;

[0030] The tolerance portion in the assembly hole is a recessed portion. By fully extending the second stud assembly part 2 into the first stud assembly part 1, the outer circle of the ball head protruding part 12 pushes up the arc expansion piece 6 and presses it against the recessed portion.

[0031] Embodiment 2

[0032] Most of the combined mounting portion 3 extends into the embedded groove on the assembly hole, and the limiting end portion 8 is outside, thereby improving the protection effect of the combined mounting portion 3;

[0033] The combined mounting portion 3 protrudes to the outside, and only the stud spiral portion 4 is located inside the assembly hole. During disassembly, the limiting end portion 8 takes out the second stud assembly part 2, and then the first stud assembly part 1 is rotated and removed through the combined mounting portion 3 protruding to the outside. When disassembling, the combined mounting portion 3 protruding to the outside does not require the aid of tools, which is convenient for users to quickly disassemble and detach.

[0034] According to different assembly holes, first stud assembly parts 1 and second stud assembly parts 2 of different lengths and sizes can be selected to change the extendable length and cope with the tolerances in different assembly holes.

[0035] Working principle: When in use, the stud spiral part 4 is combined with the thread in the assembly hole to fix it in the assembly hole, and then the internal thread 7 and the external thread of the external thread combination part 10 are tightened and fixed to fix the first stud assembly part 1 and the second stud assembly part 2 together;

[0036] When the external thread combination part 10 and the internal thread 7 rotate and combine, each downward rotation will drive the straight rod insertion part 11 to move downward, and drive the ball head ejection part 12 below to move outward. After moving downward for a certain distance, the wider arc surface of the ball head ejection part 12 will contact the arc expansion piece 6, so that the arc expansion piece 6 is pushed outward by the ball head ejection part 12, thereby expanding and stretching the arc expansion piece 6 outward, so that the arc expansion piece 6 contacts the tolerance part in the hole, and the two are pressed together to limit the bottom of the stud and the tolerance part in the hole.

[0037] During disassembly, the second stud assembly part 2 is firstly taken out and separated from the first stud assembly part 1 through the limiting end part 8, and then the first stud assembly part 1 is taken out from the assembly hole.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A stud structure for absorbing tolerance, comprising a first stud assembly (1), characterized in that: A second stud assembly (2) is arranged inside the first stud assembly (1). The first stud assembly (1) comprises an expansion portion (5) located at the bottom, the expansion portion (5) comprises a plurality of arc-shaped expansion pieces (6) distributed in an annular manner, and an opening is arranged at the center of the expansion portion (5). The second stud assembly (2) comprises a ball head ejection portion (12) located at the bottom, the ball head ejection portion (12) is hemispherical, and the second stud assembly (2) expands and extends the arc-shaped expansion piece (6) outward through the ball head ejection portion (12).

2. A stud structure for absorbing tolerance according to claim 1, characterized in that: A stud spiral portion (4) is provided at one end of the expansion portion (5), and the expansion portion (5) is located at the bottom of the stud spiral portion (4). A through hole is provided inside the stud spiral portion (4), and a thread matching the assembly hole is provided on the outer wall of the stud spiral portion (4).

3. A stud structure for absorbing tolerance according to claim 2, characterized in that: A combined mounting portion (3) is provided at one end of the stud spiral portion (4) away from the expansion portion (5), and an internal thread (7) is provided on the inner wall of the combined mounting portion (3).

4. A stud structure for absorbing tolerance according to claim 3, characterized in that: A straight rod insertion portion (11) is provided at one end of the ball head ejection portion (12), and the straight rod insertion portion (11) is inserted into the stud spiral portion (4) through a through hole.

5. A stud structure for absorbing tolerance according to claim 4, characterized in that: An end of the straight rod insertion portion (11) away from the ball head ejection portion (12) is provided with an external thread combination portion (10) matching the internal thread (7), and the second stud assembly part (2) is fixed in the first stud assembly part (1) by combining the external thread combination portion (10) and the internal thread (7).

6. A stud structure for absorbing tolerance according to claim 5, characterized in that: A limiting end portion (8) is provided at one end of the external thread combination portion (10) away from the straight rod insertion portion (11), and the size of the limiting end portion (8) is larger than the upper opening of the combination installation portion (3).

7. A stud structure for absorbing tolerance according to claim 6, characterized in that: A key groove (9) is provided on the upper surface of the limiting end portion (8).

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