High-precision tension adjusting and positioning bolt structure

Abstract

The utility model discloses a high-precision tension adjusting positioning bolt structure which comprises an upper screw rod, one end of the upper screw rod is in threaded connection with an upper sleeve, the end, away from the upper screw rod, of the upper sleeve is connected with a middle sleeve, meanwhile, the end, close to the upper screw rod, of the upper sleeve is provided with a first observation window, and an adjusting rotary disc is installed in the middle of the middle sleeve. The end, away from the upper sleeve, of the middle sleeve is connected with a lower sleeve, the interior of the lower sleeve is in threaded connection with a lower screw, the end, close to the lower screw, of the lower sleeve is provided with a second observation window, the surface of the upper screw is provided with a first graduated scale, and the surface of the end, deep into the upper sleeve, of the upper screw is provided with a first threaded protrusion. And a second graduated scale is mounted on the surface of the lower screw rod. According to the high-precision tension adjusting and positioning bolt structure, when two parts are limited, the tension between the two parts can be limited, and the position between the two parts can be accurately calculated.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a high-precision tension-adjusting positioning bolt structure. Background Art

[0002] Mechanical parts, cylindrical threaded fasteners with nuts. A type of fastener consisting of a head and a screw (a cylinder with external threads), which needs to be matched with a nut to fasten two parts with through holes. This type of connection is called bolt connection, and when assembling some more precise parts, high-precision bolts are needed to assist in positioning.

[0003] For example, a tension adjusting bolt with application number CN202023268930.5 specifically relates to the field of bolts. The tension adjusting bolt adopts a hydraulic anti-tensile structure. The sliding movement of the tension valve stem assembly inside the tension valve sleeve forms a negative pressure inside the hydraulic liquid or damping fluid to offset the tension, thereby realizing the anti-tensile function. The tension of the tension bolt is adjusted by filling and discharging the hydraulic liquid or the damping liquid and utilizing the volume change of the liquid. The adjustment is simple and convenient and can be adjusted online. However, similar to the comparative documents of the above-mentioned application, the accuracy is insufficient when the adjusting bolt is used to assist in positioning the parts, and the tension cannot be adjusted after the positioning is completed.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a high-precision tension adjustment positioning bolt structure is proposed. Utility Model Content

[0005] The utility model aims to provide a high-precision tension adjustment positioning bolt structure to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision tension adjustment positioning bolt structure, comprising an upper screw, one end of the upper screw is threadedly connected to an upper sleeve, and the end of the upper sleeve away from the upper screw is connected to a middle sleeve, and at the same time, a first observation window is installed at the end of the upper sleeve close to the upper screw, an adjustment dial is installed in the middle of the middle sleeve, and the end of the middle sleeve away from the upper sleeve is connected to a lower sleeve, the internal thread of the lower sleeve is connected to the lower screw, and a second observation window is installed at the end of the lower sleeve close to the lower screw.

[0007] Furthermore, a first scale is installed on the surface of the upper screw, and a first threaded protrusion is provided on the surface of one end of the upper screw that penetrates into the upper sleeve.

[0008] Furthermore, a second scale is installed on the surface of the lower screw, and a second threaded protrusion is provided on the surface of one end of the lower screw that penetrates into the lower sleeve.

[0009] Furthermore, a first tension spring is installed on one side of the interior of the middle sleeve, and a second tension spring is installed on the other side of the interior of the middle sleeve. One end of the first tension spring and one end of the second tension spring are both connected to a steel wire rope, and the other end of the steel wire rope is wound around the adjusting dial.

[0010] Furthermore, the other end of the first tension spring is welded to the end of the upper screw rod having the first threaded protrusion.

[0011] Furthermore, the other end of the second tension spring is welded to the end of the lower screw rod with the second threaded protrusion.

[0012] The utility model provides a high-precision tension adjustment positioning bolt structure, which has the following beneficial effects: the high-precision tension adjustment positioning bolt structure can not only limit the tension between the two parts when limiting the position of the two parts, but also can accurately calculate the position between the two parts;

[0013] In the present application, the distance between the upper screw and the middle sleeve can be read through the first observation window by the first scale on the surface of the upper screw. The second scale is installed on the surface of the lower screw, and the second threaded protrusion is provided on the surface of one end of the lower screw that penetrates into the lower sleeve. Since the distance between the lower screw and the middle sleeve can be read in the second observation window by the second scale on the surface of the upper screw, the distance between the upper screw and the lower screw is calculated by adding the sum of the values ​​read in the first observation window and the second observation window and the length of the middle sleeve, thereby controlling the distance between the two parts connected by the high-precision tension adjustment positioning bolt structure, so that the distance between the two parts can be accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a high-precision tension adjustment positioning bolt structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of an upper sleeve of a high-precision tension adjustment positioning bolt structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of a lower sleeve of a high-precision tension adjustment positioning bolt structure of the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the internal structure of an upper sleeve of a high-precision tension adjustment positioning bolt structure.

[0018] In the figure: 1. upper screw; 2. first observation window; 3. upper sleeve; 4. middle sleeve; 5. adjustment dial; 6. lower sleeve; 7. lower screw; 8. second observation window; 9. first scale; 10. first threaded protrusion; 11. second scale; 12. second threaded protrusion; 13. first tension spring; 14. second tension spring. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0020] like Figure 1-Figure 4 As shown, a high-precision tension adjustment positioning bolt structure comprises an upper screw rod 1, one end of the upper screw rod 1 is threadedly connected to an upper sleeve 3, and the end of the upper sleeve 3 away from the upper screw rod 1 is connected to a middle sleeve 4, and at the same time, a first observation window 2 is installed at the end of the upper sleeve 3 close to the upper screw rod 1, an adjustment dial 5 is installed in the middle of the middle sleeve 4, and the end of the middle sleeve 4 away from the upper sleeve 3 is connected to a lower sleeve 6, the inner thread of the lower sleeve 6 is connected to a lower screw rod 7, and a second observation window 8 is installed at the end of the lower sleeve 6 close to the lower screw rod 7. In actual use, the upper screw rod 1 and the lower screw rod 7 are respectively connected to two parts that need to be connected through nuts.

[0021] A first scale 9 is installed on the surface of the upper screw 1, and a first threaded protrusion 10 is provided on the surface of one end of the upper screw 1 that penetrates into the upper sleeve 3. When in use, the upper screw 1 penetrates into the interior of the upper sleeve 3, and the overall length of the upper screw 1 is a certain value. The distance between the upper screw 1 and the middle sleeve 4 can be read through the first scale 9 on the surface of the upper screw 1 through the first observation window 2. A second scale 11 is installed on the surface of the lower screw 7, and a second threaded protrusion 12 is provided on the surface of one end of the lower screw 7 that penetrates into the lower sleeve 6. Since the distance between the lower screw 7 and the middle sleeve 4 can be read in the second observation window 8 through the second scale 11 on the surface of the upper screw 7, the distance between the upper screw 1 and the lower screw 7 is obtained by calculating the sum of the values ​​read in the first observation window 2 and the second observation window 8 plus the length of the middle sleeve 4, thereby controlling the distance between the two parts connected by the high-precision tension adjustment positioning bolt structure, so that the distance between the two parts can be accurately controlled.

[0022] A first tension spring 13 is installed on one side of the interior of the middle sleeve 4, and a second tension spring 14 is installed on the other side of the interior of the middle sleeve 4, one end of the first tension spring 13 and one end of the second tension spring 14 are both connected with a steel wire rope, and the other end of the steel wire rope is wound on the adjusting dial 5, the other end of the first tension spring 13 is welded to one end of the upper screw 1 with the first threaded protrusion 10, and the other end of the second tension spring 14 is welded to one end of the lower screw 7 with the second threaded protrusion 12. During actual use, the steel wire rope can be driven by rotating the adjusting dial 5, so that the steel wire rope pulls the first tension spring 13 and the second tension spring 14 to deform, thereby changing the magnitude of the maximum tension between the upper screw 1 and the lower screw 7 at one time, so that the upper screw 1 and the lower screw 7 become loose after long-term use, causing a change in the distance between the two connected parts.

[0023] In summary, in the actual use of the high-precision tension adjustment positioning bolt structure, the upper screw 1 and the lower screw 7 are respectively connected to two parts that need to be connected through nuts, and the upper screw 1 penetrates into the interior of the upper sleeve 3, and the overall length of the upper screw 1 is a certain value. The distance between the upper screw 1 and the middle sleeve 4 can be read through the first scale 9 on the surface of the upper screw 1 through the first observation window 2, and the second scale 11 is installed on the surface of the lower screw 7, and the second threaded protrusion 12 is provided on the surface of one end of the lower screw 7 that penetrates into the lower sleeve 6. Since the distance between the lower screw 7 and the middle sleeve 4 can be read in the second observation window 8 through the second scale 11 on the surface of the upper screw 7, the distance between the upper screw 1 and the lower screw 7 is obtained by calculating the sum of the values ​​read in the first observation window 2 and the second observation window 8 plus the length of the middle sleeve 4, thereby controlling the distance between the two parts connected by the high-precision tension adjustment positioning bolt structure, so that the distance between the two parts can be accurately controlled.

[0024] A first tension spring 13 is installed on one side of the interior of the middle sleeve 4, and a second tension spring 14 is installed on the other side of the interior of the middle sleeve 4, one end of the first tension spring 13 and one end of the second tension spring 14 are both connected with a steel wire rope, and the other end of the steel wire rope is wound on the adjusting dial 5, the other end of the first tension spring 13 is welded to one end of the upper screw 1 with the first threaded protrusion 10, and the other end of the second tension spring 14 is welded to one end of the lower screw 7 with the second threaded protrusion 12. During actual use, the steel wire rope can be driven by rotating the adjusting dial 5, so that the steel wire rope pulls the first tension spring 13 and the second tension spring 14 to deform, thereby changing the magnitude of the maximum tension between the upper screw 1 and the lower screw 7 at one time, so that the upper screw 1 and the lower screw 7 become loose after long-term use, causing a change in the distance between the two connected parts.

[0025] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A high-precision tension adjustment positioning bolt structure, comprising an upper screw rod (1), characterized in that: One end of the upper screw (1) is threadedly connected to an upper sleeve (3), and the end of the upper sleeve (3) away from the upper screw (1) is connected to a middle sleeve (4), and at the same time, a first observation window (2) is installed at the end of the upper sleeve (3) close to the upper screw (1), an adjustment dial (5) is installed in the middle of the middle sleeve (4), and the end of the middle sleeve (4) away from the upper sleeve (3) is connected to a lower sleeve (6), the inner thread of the lower sleeve (6) is connected to a lower screw (7), and a second observation window (8) is installed at the end of the lower sleeve (6) close to the lower screw (7).

2. A high-precision tension adjustment positioning bolt structure according to claim 1, characterized in that: A first scale (9) is installed on the surface of the upper screw rod (1), and a first threaded protrusion (10) is provided on the surface of one end of the upper screw rod (1) that penetrates into the upper sleeve (3).

3. A high-precision tension adjustment positioning bolt structure according to claim 1, characterized in that: A second scale (11) is installed on the surface of the lower screw rod (7), and a second threaded protrusion (12) is provided on the surface of one end of the lower screw rod (7) that penetrates into the lower sleeve (6).

4. A high-precision tension adjustment positioning bolt structure according to claim 1, characterized in that: A first tension spring (13) is installed on one side of the interior of the middle sleeve (4), and a second tension spring (14) is installed on the other side of the interior of the middle sleeve (4); one end of the first tension spring (13) and one end of the second tension spring (14) are both connected to a steel wire rope, and the other end of the steel wire rope is wound around the adjustment dial (5).

5. A high-precision tension adjustment positioning bolt structure according to claim 4, characterized in that: The other end of the first tension spring (13) is welded to one end of the upper screw rod (1) having the first threaded protrusion (10).

6. A high-precision tension adjustment positioning bolt structure according to claim 4, characterized in that: The other end of the second tension spring (14) is welded to one end of the lower screw rod (7) having the second threaded protrusion (12).

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