CN110375909B - Bolt tension detection tool - Google Patents
Bolt tension detection tool Download PDFInfo
- Publication number
- CN110375909B CN110375909B CN201910598540.7A CN201910598540A CN110375909B CN 110375909 B CN110375909 B CN 110375909B CN 201910598540 A CN201910598540 A CN 201910598540A CN 110375909 B CN110375909 B CN 110375909B
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- bolt
- upper shell
- lower shell
- compression spring
- shell
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a bolt tension force detection tool, which comprises an upper shell, a lower shell and a compression spring, wherein the upper shell is provided with a first end and a second end; coaxial bolt through holes are formed between the upper shell and the lower shell; the lower shell is provided with a U-shaped groove with a U-shaped vertical surface, and the upper shell is embedded into the U-shaped groove and can slide along the side wall of the U-shaped groove; the compression spring is positioned between the upper shell and the lower shell; and scales which are sequentially marked along the extending direction of the bolt through hole are arranged on the outer side wall of the upper shell. The bolt tension detection tool disclosed by the invention measures the tension of the bolt on the upper shell and the lower shell which can relatively slide and the compression spring providing restoring force, and provides prestress for the joint of the bolt or the joint position of parts in a preassembling stage.
Description
Technical Field
The invention relates to the technical field of airplane assembly detection equipment, in particular to a bolt tension force detection tool.
Background
In the aircraft assembly industry, a large number of skin parts have deformation conditions due to manufacturing errors, molding springback and the like. In order to avoid the waste of parts and ensure the product quality, the installation is usually carried out by adopting a prestress control mode, namely, in the stage of demoulding or assembling and preassembling the parts, a certain amount of force is applied to the bolt joint or the joint position of the parts, and whether the gap value meets the requirement is checked.
In order to achieve the purpose, currently, weight pressing and dynamometer point pressing are generally adopted in the industry, and pressure can be applied in a laboratory through a pressure sensor, but the methods have the major defects:
1. pressing a weight: pressing the inspection position by a heavy object such as a lead bag and the like has a large application surface, so that accurate pressure application cannot be realized; only the direction of the gravity line can be checked, the error is amplified when the gravity line deviates from the direction of the gravity, and the pressure cannot be applied in the direction parallel to the direction of the gravity line.
2. Point pressure of the dynamometer: the dynamometer is used for exerting pressure on the measuring points point by point, the dynamometer is held by hands each time of pressure application, the force is adjusted according to the reading value, and the operation is troublesome; the deformation of the aircraft skin affects each other, but the method can only apply pressure in a single point, and the reliability of the measurement result is poor.
3. Pressure application by a pressure sensor: the method has high precision, but has great requirement on equipment cost, and is not suitable for industrial production.
Disclosure of Invention
Aiming at the prior art, the invention provides a bolt tension detection tool capable of rapidly reading the bolt tension, and the tool can also provide certain prestress for the bolt connection part, so that the problem of prestress control is solved.
The invention is realized by the following technical scheme: the bolt tension force detection tool comprises an upper shell, a lower shell and a compression spring; coaxial bolt through holes are formed between the upper shell and the lower shell; the lower shell is provided with a U-shaped groove with a U-shaped vertical surface, and the upper shell is embedded into the U-shaped groove and can slide along the side wall of the U-shaped groove; the compression spring is positioned between the upper shell and the lower shell; and scales which are sequentially marked along the extending direction of the bolt through hole are arranged on the outer side wall of the upper shell.
The bolt through hole is used for a screw rod of the bolt to penetrate through. The diameters of the bolt through hole of the upper shell and the bolt through hole of the lower shell are equal and are both larger than the outer diameter of the screw of the bolt. The compression spring is positioned between the upper shell and the lower shell, one end of the compression spring is connected with the lower end of the upper shell, the other end of the compression spring is connected with the bottom surface of the U-shaped groove of the lower shell, the upper shell slides up and down in the U-shaped groove by utilizing the compression and restoring force of the compression spring, and the tightening force of the bolt is measured by reading the scale.
Furthermore, an annular groove coaxial with the bolt through hole is formed in the end face, embedded into the lower shell, of the upper shell; an annular limiting piece coaxial with the bolt through hole is arranged in the U-shaped groove, and one end, far away from the bottom surface of the U-shaped groove, of the annular limiting piece is embedded into the annular groove and can slide along the annular groove; one end of the compression spring is fixed on the end face of the annular limiting part embedded into the annular groove, and the other end of the compression spring is fixed on the bottom face of the annular groove. The length of the compression spring is smaller than the depth of the annular groove, so that the annular limiting piece is still partially embedded into the annular groove under the condition that the upper shell is not stressed. The annular groove and the annular limiting part play a role in guiding the compression spring.
Furthermore, a plurality of positioning grooves arranged along the circumferential direction of the bolt through hole are formed in the end surface of the upper shell embedded into the lower shell; a plurality of positioning rods arranged along the circumferential direction of the bolt through holes are arranged on the bottom surface of the U-shaped groove and are arranged along the extending direction of the bolt through holes; the positioning rods are embedded into the positioning grooves one to one and can slide along the positioning grooves; one end of the compression spring is connected with one end of the positioning rod, which is far away from the bottom surface of the U-shaped groove, and the other end of the compression spring is connected with the bottom surface of the positioning groove.
Furthermore, the detection tool also comprises a limiting ring, and the limiting ring is arranged at one end of the lower shell, which is close to the upper shell, and is connected with the lower shell; one end of the upper shell, which is embedded into the lower shell, is provided with an annular boss with the diameter larger than the outer side surface of the upper shell; the inner diameter of the limiting ring is larger than or equal to the outer diameter of the upper shell; the outer diameter of the annular boss is smaller than or equal to the inner diameter of the U-shaped groove. The lower surface of the limiting ring is pressed on the upper surface of the lower shell and the upper surface of the annular boss of the upper shell, so that the annular boss is fixed.
Furthermore, the vertical section of the limiting ring is in a shape of Gamma; the limiting ring is in threaded connection with the outer side wall of the lower shell, so that the limiting ring and the lower shell can be conveniently mounted and dismounted.
Furthermore, guide grooves coaxial with the positioning grooves are formed in the bottom surfaces of the positioning grooves; the end surfaces of the positioning rods embedded in the positioning grooves are provided with guide rods which are coaxial with the guide grooves respectively; the compression spring is nested on the guide rod, and the outer diameter of the guide rod is in tolerance fit with the inner diameter of the guide groove.
Furthermore, one end, far away from lower casing, of upper housing is provided with the bolt groove, the head of bolt can imbed in the bolt groove, to the contact surface of the head of button head bolt multiplicable bolt and upper housing.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the bolt tension detection tool provided by the invention measures the tension of the bolt on the upper shell and the lower shell which can slide relatively and the compression spring providing restoring force, and provides prestress for the joint of the bolt or the joint position of parts in a preassembling stage.
(2) The bolt tension detection tool provided by the invention is also provided with the limiting ring, so that the upper shell does not depart from the lower shell.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a vertical sectional view of embodiment 2 of the present invention;
FIG. 3 is a sectional view taken along the A-A plane in accordance with example 2 of the present invention;
FIG. 4 is a schematic structural diagram of embodiment 3 of the present invention;
FIG. 5 is a schematic structural view of embodiment 4 of the present invention;
wherein: 1-upper casing, 11-bolt through hole, 12-annular groove, 13-constant head tank, 131-guide way, 14-bolt groove, 15-annular boss, 2-lower casing, 21-U type groove, 22-annular locating part, 23-locating lever, 231-guide bar, 3-compression spring, 4-scale, 5-spacing ring.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1, a bolt tension detecting tool includes an upper case 1, a lower case 2, and a compression spring 3; a coaxial bolt through hole 11 is formed between the upper shell 1 and the lower shell 2; the lower shell 2 is provided with a U-shaped groove 21 with a U-shaped vertical surface, and the upper shell 1 is embedded into the U-shaped groove 21 and can slide along the side wall of the U-shaped groove 21; the compression spring 3 is positioned between the upper shell 1 and the lower shell 2; the outer side wall of the upper shell 1 is provided with scales 4 which are sequentially marked along the extending direction of the bolt through hole 11.
The outer diameter of the upper shell 1 is in tolerance fit with the inner diameter of the U-shaped groove 21, so that the upper shell 1 can slide along the inner side wall of the U-shaped groove 21. Bolt through holes 11 of the lower shell 2 are formed in the bottom surface of a U-shaped groove 21, and the U-shaped groove 21 is opened upwards.
The working principle is as follows: placing a detection tool on a part A and a part B to be connected, which are provided with threaded holes, so that the bolt through hole 11 is coaxial with the threaded holes; the screw of the bolt passes through the bolt through hole 11 of the upper shell 1 and the bolt through hole 11 of the lower shell 2, and the head part is pressed on the upper end surface of the upper shell 1. In an initial state, the compression spring 3 is compressed under the action of the bolt and the gravity of the upper shell 1; the upper end surface of the lower shell 2 is aligned to the scale 4 on the outer side wall of the upper shell 1; then the bolt is screwed so that the screw of the bolt is screwed into the threaded hole of the part a, the upper housing 1 is pressed to move toward the lower housing 2, and the compression spring 3 is compressed. Due to the restoring force of the compression spring 3, the lower shell 2 is pushed to press the part A downwards, so that the part A is pressed on the part B, and prestress is provided for the connection of the part A and the part B; and continuously rotating the bolt to enable the part A and the part B to be compressed, and reading the scale 4 corresponding to the upper end surfaces of the upper shell 2 and the lower shell 2 on the outer side wall of the upper shell 1 to obtain the tension force applied to the bolt. In addition, by adopting the detection tool disclosed by the invention, the pressing force between the part A and the part B can be monitored in real time, and the pressing force of the part A and the part B and the tensioning force of the bolt can be kept.
The corresponding relation between the displacement of the upper shell 1 relative to the lower shell 2 and the tension accords with Hooke's law.
Preferably, one end of the upper shell 1 far away from the lower shell 2 is provided with a bolt groove 14, the head of the bolt can be embedded into the bolt groove 14, and for a round head bolt, the contact surface between the head of the bolt and the upper shell 1 can be increased.
Example 2
The embodiment is improved on the basis of embodiment 1, and the improvement is as follows: as shown in fig. 2 and 3, an annular groove 12 coaxial with the bolt through hole 11 is arranged on the end surface of the upper shell 1 embedded in the lower shell 2; an annular limiting piece 22 coaxial with the bolt through hole 11 is arranged in the U-shaped groove 21, and one end, far away from the bottom surface of the U-shaped groove 21, of the annular limiting piece 22 is embedded into the annular groove 12 and can slide along the annular groove 12; one end of the compression spring 3 is fixed on the end face of the annular limiting piece 22 embedded in the annular groove 12, and the other end of the compression spring 3 is fixed on the bottom face of the annular groove 12. The length of the compression spring 3 is smaller than the depth of the annular groove 12, so that the annular limiting piece 22 is still partially embedded into the annular groove 12 under the condition that the upper shell 1 is not stressed. The annular groove 12 and the annular stop 22 serve as a guide for the compression spring 3.
The bolt through hole 11, the annular groove 12, the annular limiting piece 22, the U-shaped groove 21 and the outer side wall of the upper shell 1 are coaxially arranged; the inner diameter of the annular groove 12 is larger than the diameter of the bolt through hole 11, the inner diameter of the annular limiting piece 22 is in tolerance fit with the inner diameter of the annular groove 12, and the outer diameter of the annular limiting piece 22 is in tolerance fit with the outer diameter of the annular groove 12; the diameter of the outer side wall of the upper shell 1 is larger than the outer diameter of the annular groove 12, and the diameter of the outer side wall of the upper shell 1 is in tolerance fit with the inner diameter of the U-shaped groove 21. The upper shell 1 can slide with the lower shell 2 without friction force, so that the accuracy of the measured tension force applied to the bolt is improved.
Other parts in this embodiment are substantially the same as those in embodiment 1, and thus are not described in detail.
Example 3
The embodiment is improved on the basis of embodiment 1, and the improvement is as follows: as shown in fig. 4, the end surface of the upper casing 1 embedded in the lower casing 2 is provided with a plurality of positioning grooves 13 arranged along the circumferential direction of the bolt through hole 11; a plurality of positioning rods 23 arranged along the circumferential direction of the bolt through holes 11 are arranged on the bottom surface of the U-shaped groove 21, and the positioning rods 23 are arranged along the extending direction of the bolt through holes 11; the positioning rods 23 are embedded into the positioning grooves 13 one by one and can slide along the positioning grooves 13; one end of the compression spring 3 is connected with one end of the positioning rod 23 far away from the bottom surface of the U-shaped groove 21, and the other end of the compression spring is connected with the bottom surface of the positioning groove 13.
The positioning groove 13, the positioning rod 23 and the compression spring 3 are all arranged in a one-to-one mode, and the compression spring 3 is arranged in the positioning groove 13 and plays a role in guiding. The compression springs 3 are adopted to provide restoring force for detecting the tensioning force, the bearing range of the detection tool is enhanced, the attenuation rate of the elasticity of the compression springs 3 is reduced, and the service life of the detection tool is prolonged.
Other parts in this embodiment are substantially the same as those in embodiment 1, and thus are not described in detail.
Example 4
The embodiment is improved on the basis of the embodiment 3, and the improvement is that: as shown in fig. 5, the bottom surfaces of the positioning grooves 13 are provided with guide grooves 131 coaxial with the positioning grooves 13; the end surfaces of the positioning rods 23 embedded in the positioning grooves 13 are respectively provided with a guide rod 231 which is coaxial with the guide groove 131; compression spring 3 nests in on guide bar 231, guide bar 231 external diameter and the internal diameter tolerance fit of guide way 131 realize compression spring 3 inside and outside direction simultaneously, improve the degree of accuracy.
Other parts in this embodiment are substantially the same as those in embodiment 3, and thus are not described in detail.
Example 5
The embodiment is improved on the basis of any one of embodiments 2 to 4, and the improvement is as follows: the detection tool further comprises a limiting ring 5, wherein the limiting ring 5 is arranged at one end, close to the upper shell 1, of the lower shell 2 and is connected with the lower shell 2; one end of the upper shell 1 embedded into the lower shell 2 is provided with an annular boss 15 with the diameter larger than the outer side surface of the upper shell 1; the inner diameter of the limiting ring 5 is larger than or equal to the outer diameter of the upper shell 1; the outer diameter of the annular boss 15 is smaller than or equal to the inner diameter of the U-shaped groove 21. The lower surface of the limiting ring 5 is pressed on the upper surface of the lower shell 2 and the upper surface of the annular boss 15 of the upper shell 1, so that the annular boss 15 is fixed.
The lower surface of the limiting ring 5 is partially fixed on the end surface of the lower shell 2, and partially pressed on the annular boss 15 of the upper shell 1, so that the upper shell 1 is limited to be separated from the lower shell 2, the compression range of the compression spring 3 is limited, excessive compression of the spring is avoided, and the spring is protected.
Preferably, the compression spring 3 is always kept in a compressed state, so that the lower case 2 has a tendency to move downward.
Other parts in this embodiment are substantially the same as those in any of embodiments 2 to 4, and thus are not described in detail.
Example 6
This embodiment is an improvement on the basis of embodiment 5, and the improvement is that: the vertical section of the limiting ring 5 is in a shape of Gamma; spacing ring 5 and the lateral wall threaded connection of casing 2 down realize spacing ring 5 and the dismantlement of casing 2 down and be connected.
The limiting ring 5 comprises a horizontal part and a vertical part, wherein the horizontal part is horizontally arranged, and the vertical part is vertically arranged, and the horizontal part is pressed on the end surface of the lower shell 2 and the annular step of the upper shell 1; the inner diameter of the vertical portion is equal to the outer diameter of the lower housing 2. Be provided with the internal thread on the inside wall of vertical portion, be provided with the external screw thread on the lateral wall of casing 2 down, realize vertical portion and casing 2's threaded connection down.
Other parts of this embodiment are substantially the same as those of embodiment 5, and thus are not described in detail.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (1)
1. A bolt tension force detection tool is characterized by comprising an upper shell (1), a lower shell (2) and a compression spring (3); a coaxial bolt through hole (11) is formed between the upper shell (1) and the lower shell (2); the lower shell (2) is provided with a U-shaped groove (21) with a U-shaped vertical surface, and the upper shell (1) is embedded into the U-shaped groove (21) and can slide along the side wall of the U-shaped groove (21); the compression spring (3) is positioned between the upper shell (1) and the lower shell (2); scales (4) which are sequentially marked along the extending direction of the bolt through hole (11) are arranged on the outer side wall of the upper shell (1);
the end face of the upper shell (1) embedded into the lower shell (2) is provided with an annular groove (12) coaxial with the bolt through hole (11); an annular limiting piece (22) coaxial with the bolt through hole (11) is arranged in the U-shaped groove (21), and one end, far away from the bottom surface of the U-shaped groove (21), of the annular limiting piece (22) is embedded into the annular groove (12) and can slide along the annular groove (12); one end of the compression spring (3) is fixed on the end face of the annular limiting piece (22) embedded into the annular groove (12), and the other end of the compression spring (3) is fixed on the bottom face of the annular groove (12);
the end face of the upper shell (1) embedded into the lower shell (2) is provided with a plurality of positioning grooves (13) arranged along the circumferential direction of the bolt through hole (11); a plurality of positioning rods (23) arranged along the circumferential direction of the bolt through holes (11) are arranged on the bottom surface of the U-shaped groove (21), and the positioning rods (23) are arranged along the extending direction of the bolt through holes (11); the positioning rods (23) are embedded into the positioning grooves (13) one by one and can slide along the positioning grooves (13); one end of the compression spring (3) is connected with one end of the positioning rod (23) far away from the bottom surface of the U-shaped groove (21), and the other end of the compression spring is connected with the bottom surface of the positioning groove (13);
the anti-theft device is characterized by further comprising a limiting ring (5), wherein the limiting ring (5) is arranged at one end, close to the upper shell (1), of the lower shell (2) and is connected with the lower shell (2); one end of the upper shell (1) embedded into the lower shell (2) is provided with an annular boss (15) with the diameter larger than the outer side surface of the upper shell (1); the inner diameter of the limiting ring (5) is larger than or equal to the outer diameter of the upper shell (1); the outer diameter of the annular boss (15) is smaller than or equal to the inner diameter of the U-shaped groove (21);
the vertical section of the limiting ring (5) is L-shaped; the limiting ring (5) is in threaded connection with the outer side wall of the lower shell (2);
the bottom surfaces of the positioning grooves (13) are provided with guide grooves (131) which are coaxial with the positioning grooves (13); the end surfaces of the positioning rods (23) embedded into the positioning grooves (13) are respectively provided with guide rods (231) which are coaxial with the guide grooves (131); the compression spring (3) is nested on the guide rod (231), and the outer diameter of the guide rod (231) is in tolerance fit with the inner diameter of the guide groove (131);
and one end of the upper shell (1) far away from the lower shell (2) is provided with a bolt groove (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910598540.7A CN110375909B (en) | 2019-07-04 | 2019-07-04 | Bolt tension detection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910598540.7A CN110375909B (en) | 2019-07-04 | 2019-07-04 | Bolt tension detection tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110375909A CN110375909A (en) | 2019-10-25 |
| CN110375909B true CN110375909B (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910598540.7A Active CN110375909B (en) | 2019-07-04 | 2019-07-04 | Bolt tension detection tool |
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| CN (1) | CN110375909B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09317736A (en) * | 1996-05-24 | 1997-12-09 | Fujitsu Ten Ltd | Screw with fastening torque display and nut with fastening torque display |
| CN104296896B (en) * | 2014-11-04 | 2016-09-07 | 山东科技大学 | Analog simulation test direct-reading anchor ergometer method of work |
| CN107525619A (en) * | 2017-07-18 | 2017-12-29 | 河南航天精工制造有限公司 | A kind of plate nut launch force detects instrument |
| CN107782619A (en) * | 2017-09-29 | 2018-03-09 | 兰州飞行控制有限责任公司 | A kind of cable pin intensity detection frock |
| CN208313698U (en) * | 2018-07-10 | 2019-01-01 | 滁州泰斯特电子科技有限公司 | A kind of refrigerator part pressure resistant testing device |
| CN109406037A (en) * | 2018-12-13 | 2019-03-01 | 美钻深海能源科技研发（上海）有限公司 | A kind of height pressure sensor with pressure indicating structure |
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2019
- 2019-07-04 CN CN201910598540.7A patent/CN110375909B/en active Active
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