CN221037763U - Device for measuring torsional moment of pulling and twisting strip of helicopter - Google Patents
Device for measuring torsional moment of pulling and twisting strip of helicopter Download PDFInfo
- Publication number
- CN221037763U CN221037763U CN202322545167.3U CN202322545167U CN221037763U CN 221037763 U CN221037763 U CN 221037763U CN 202322545167 U CN202322545167 U CN 202322545167U CN 221037763 U CN221037763 U CN 221037763U
- Authority
- CN
- China
- Prior art keywords
- torsion
- pull
- hole
- support
- torsion bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 15
- 238000000691 measurement method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 2
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a device for measuring the torsional moment of a pull torsion bar of a helicopter, comprising: the upper part of the mounting seat forms a supporting area, the supporting area is provided with a middle support positioned in the middle and side supports symmetrically arranged at two sides, and the middle support limits the Z-direction freedom degree of the tension torsion bar; the torsion part is rotatably connected with the corresponding side part support, the rotation angle a is the torsion angle of the loading force, and the torsion part fixes the two ends of the tension torsion bar, is integrated with the tension torsion bar, and limits the X-direction freedom degree and the Y-direction freedom degree of the tension torsion bar; a rotating hole of a torque wrench is preset on the torsion part; and the locking part locks the torsion part and the side support, and the torque wrench directly measures the torque corresponding to the torsion angle through rotation. The device can directly measure the torsion moment of the tension torsion bar without complex calculation, is simple and convenient to measure, and can obtain a result more easily, and compared with an indirect measuring method, the device has the advantages of simple measuring operation, visual result, low cost, less required manpower and good economy.
Description
Technical Field
The invention relates to the technical field of aerospace, in particular to a device for measuring torsional moment of a tension torsion bar of a helicopter.
Background
Tension torsion bar is an important aerodynamic component on helicopters, which is a major structural load bearing component. Its main functions include bearing centrifugal force generated by rotation of blade and torque generated by pitch-varying motion of blade. The balance of the forces and the torque stabilization play an important role in realizing the variable-pitch motion of the tail blade and improving the axial stress condition of the hub. It is necessary to measure the pull-strap torque.
At present, an indirect measurement method is generally adopted in a torque measurement mode of the pull torsion bar. The indirect measurement method is to measure the elongation and torsion angle of the pull torsion bar and then calculate the torsion moment of the pull torsion bar by combining a mechanical model. However, this measurement method requires a high-precision measurement device and requires a complicated calculation formula, resulting in a complicated measurement process.
Therefore, how to provide a device capable of simplifying the measurement of the tension and torsion bar moment of a helicopter is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the invention aims to provide a device for measuring the torsion moment of a tension torsion bar of a helicopter, which solves the technical problem of complex calculation for indirectly measuring the torsion moment of the tension torsion bar in the prior art.
The invention provides a device for measuring torsional moment of a tension torsion bar of a helicopter, which comprises:
The upper part of the mounting seat forms a supporting area, the supporting area is provided with a middle support positioned in the middle and side supports symmetrically arranged at two sides, and the middle support limits the Z-direction freedom degree of the pull torsion bar;
The torsion part is in rotary connection with the side support, the rotation angle a is the torsion angle of loading force, the torsion part fixes the two ends of the pull torsion bar, the torsion part and the pull torsion bar are integrated, and the X-direction freedom degree and the Y-direction freedom degree of the pull torsion bar are limited; a rotating hole of a torque wrench is preset in the torsion part;
And the locking part locks the torsion part and the side support, and the torque wrench directly measures the torque corresponding to the torsion angle through rotation.
Further, the mounting seat is a plate-shaped base, and a middle hole for mounting the middle support and a middle support fixing hole are formed in the middle of the mounting seat; a plurality of connecting holes are formed on two sides of the support corresponding to the side supports.
Further, a weight reduction groove is formed in the base.
Further, the middle support is a columnar support seat, the downward protruding part of the bottom surface of the middle support is matched with the middle support fixing hole, and the bottom surface of the middle support is fixed with the base; the top of the device is provided with a downward concave transverse groove, the transverse groove carries transverse plates which extend to two sides and are close to the two torsion parts, the transverse plates are fixed at the bottom of the transverse groove, and the pull torsion bars are carried on the transverse plates; the cell walls on two sides of the transverse cell are provided with corresponding Z-direction limiting holes according to the central holes of the tension torsion bars, and the Z-direction limiting holes and the central holes of the tension torsion bars are penetrated by long pins to be fixed.
Further, a fixing plane is formed on the outer wall of the groove wall.
Further, the side support adopts an arc-shaped support plate, the bottom surface of the arc-shaped support plate is fixed with the base, a bearing hole is formed in the horizontal direction of the top of the arc-shaped support plate, and the arc-shaped support plate is rotationally connected with the torsion part through a deep groove ball bearing; the lower part of the bearing hole is provided with a bolt hole and a limit pin hole.
Further, the torsion part is an asymmetric torsion block, the torsion block comprises a platy torsion main body, a support fixing table is arranged on the side, close to the middle support, of the torsion main body, and the support fixing table is used for fixing the end part of the tension torsion bar; a cylindrical table is arranged on one side of the torsion main body, which is far away from the supporting and fixing table, corresponding to the pull torsion bar, and a square rotating hole is positioned in the cylindrical table and penetrates through the upper part of the torsion main body; the lower part of the torsion main body is provided with a main body positioning bolt hole and a torsion strip hole.
Further, the cylindrical table is inserted into the bearing hole, so that the end face of the torsion main body is attached to the arc-shaped support plate, and the support fixing table is vertically provided with a pull torsion bar end fixing hole and is positioned and fixed through a positioning pin; the main body positioning bolt hole at the lower part of the torsion main body corresponds to the bolt hole, is positioned by the bolt, and the torsion strip hole corresponds to the limit pin hole and is temporarily fixed by the limit pin and the nut.
Further, the outside of the limiting pin is limited by a pin, wherein the bolt, the limiting pin, the nut and the pin are the locking part.
Compared with the prior art, the device for measuring the torsion moment of the pull torsion bar of the helicopter is provided, the Z-direction, the X-direction and the Y-direction degrees of freedom of the pull torsion bar are limited through the middle support and the side parts, the two ends of the pull torsion bar are fixed with the torsion part, the torque is applied by the torque wrench to enable the pull torsion bar to rotate to generate a corresponding rotation angle, the torsion moment of the torque wrench is recorded, the device can directly measure the torsion moment of the pull torsion bar without complex calculation, the measurement is simple and convenient, the obtained result is easier, and compared with an indirect measurement method, the device for measuring the torsion moment of the pull torsion bar is simple in operation, visual in result, low in cost, less in required manpower and good in economical efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a device for measuring torsional moment of a pull rod of a helicopter provided by the invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a perspective view of an apparatus for helicopter pull torsion bar torque measurement provided by the present invention;
FIG. 5 is a schematic view of the structure of the base;
FIG. 6 is a schematic structural view of an arc-shaped support plate;
FIG. 7 is a schematic view of the structure of the support base;
FIG. 8 is a perspective view of the torsion block from one perspective;
fig. 9 is a perspective view of the torsion block from another perspective.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Because the torque measurement mode of the pull torsion bar in the prior art generally adopts an indirect measurement method, high-precision measurement equipment is required to be selected, measurement errors are avoided as much as possible, complex calculation is required to be carried out according to a mechanical model after measurement, the measurement efficiency is low, and the cost is high. In view of this, an embodiment of the present invention discloses a device for measuring torsional moment of a pull torsion bar of a helicopter, comprising: the upper part of the mounting seat forms a supporting area, the supporting area is provided with a middle support positioned in the middle and side supports symmetrically arranged at two sides, and the middle support limits the Z-direction freedom degree of the pull torsion bar; the torsion part is in rotary connection with the side support, the rotation angle a is the torsion angle of loading force, the torsion part fixes the two ends of the pull torsion bar, the torsion part and the pull torsion bar are integrated, and the X-direction freedom degree and the Y-direction freedom degree of the pull torsion bar are limited; a rotating hole of a torque wrench is preset in the torsion part; and the locking part locks the torsion part and the side support, and the torque wrench directly measures the torque corresponding to the torsion angle through rotation.
According to the scheme, the Z-direction, the X-direction and the Y-direction degrees of freedom of the pull torsion bar are limited through the middle support and the side parts, the two ends of the pull torsion bar are fixed with the torsion part, the torque is applied by the torque wrench to enable the pull torsion bar to rotate to generate a corresponding rotation angle, the torsion moment of the torque wrench is recorded, the torsion moment of the pull torsion bar can be directly measured without complex calculation, the measurement is simple and convenient, the result is easier, and compared with an indirect measurement method, the measurement operation is simple, the result is visual, the cost is low, the required manpower is less, and the economy is good.
In a specific embodiment of the present invention, referring to fig. 1 to 5, the mounting base is a plate-shaped base 15, and a middle hole 151 for mounting the middle support and a middle support fixing hole 154 are formed in the middle of the mounting base; a plurality of connecting holes 152 are formed on two sides of the side support corresponding to the side support, the connecting holes 152 are positioned through the first pins 14, and the middle support and the base 15 are fixed through the first screws 13.
Advantageously, the base 15 is provided with a weight-reducing groove 153.
Advantageously, in the embodiment of the present invention, referring to fig. 4 and 7, the middle support is a cylindrical support seat 8, a bottom downward protruding portion 81 of the middle support is mounted in cooperation with the middle support fixing hole 154, and a bottom plane of the middle support is fixed to the base 15 by a pin or the like; the top of the device is provided with a downward concave transverse groove 82, the transverse groove 82 carries a transverse plate 5 which extends to two sides and is close to the two torsion parts, the transverse plate 5 is fixed at the bottom of the transverse groove 82 (can be positioned by a second pin 7 and is fixed by a second screw 6), and the pull torsion bar is carried on the transverse plate; the groove walls 83 at both sides of the transverse groove 82 are provided with corresponding Z-direction limiting holes 84 according to the central holes of the pull torsion bars, and are fixed by penetrating the Z-direction limiting holes 84 and the central holes of the pull torsion bars through the long pins 18.
Wherein, for convenience of fixing, a fixing plane 85 is formed on the outer wall of the groove wall 83.
More specifically, referring to fig. 6, the side support may be an arc-shaped support plate 1, where the bottom surface of the arc-shaped support plate 1 is fixed to the base 15 (the bottom of the arc-shaped support plate has a positioning hole 104 positioned with the first pin 14 and a threaded hole 105 fixed with the first screw 13), and the top of the arc-shaped support plate is provided with a bearing hole 101 in the horizontal direction and is rotationally connected to the torsion part through a deep groove ball bearing 2; the lower part of the bearing hole 101 is provided with a bolt hole 102 and a limit pin hole 103. Wherein the deep groove ball bearing 2 is clamped in the bearing hole 101 through the retainer ring 19 to prevent falling.
Referring to fig. 8 and 9, the torsion part is an asymmetric torsion block 3, the torsion block 3 comprises a plate-shaped torsion main body 31, a support fixing table 32 is arranged on the torsion main body 31 near the middle support side, and the support fixing table 32 is used for fixing the end part of the tension torsion bar, and the width of the end part of the tension torsion bar is larger than or equal to that of the end part of the tension torsion bar; a cylindrical table 33 is arranged on one side of the torsion main body 31 far away from the supporting and fixing table 32 and corresponds to the tension torsion bar, and a square rotating hole 331 is positioned in the cylindrical table 33 and penetrates through the upper part of the torsion main body 31; the lower portion of the torsion body 31 has a body positioning pin hole 311 and a torsion strip hole 312.
Referring to fig. 1, the cylindrical stand 33 is inserted into the bearing hole 101 to make the end surface of the torsion main body 31 fit with the arc-shaped support plate 1, and the support fixing stand 32 is vertically provided with a pull torsion bar end fixing hole 321, and is fixed in position by a positioning pin 4; the main body positioning bolt hole 311 at the lower part of the torsion main body 31 corresponds to the bolt hole 102 and is positioned by the bolt 9, and the torsion strip hole 312 corresponds to the limit bolt hole 103 and is temporarily fixed by the limit pin 11 and the nut 12.
Advantageously, referring to fig. 3, the outer portion of the limiting pin 11 is limited by the pin 10, so as to prevent the limiting pin 11 from rotating during the torque measurement. Wherein the bolt 9, the limiting pin 11, the nut 12 and the pin 10 are the locking parts.
The invention provides a method for measuring a torsion moment of a pull torsion bar, which comprises the following steps:
S1, installing a tension torsion bar, fixing the middle part of the tension torsion bar on a middle support, and limiting the Z-direction freedom degree of the tension torsion bar; fixing two ends of the pull torsion bar on the torsion part, and limiting the X-direction freedom degree and the Y-direction freedom degree of the pull torsion bar;
S2, measuring, namely positioning the locking part to ensure that the torsion angle a is 0 degrees; inserting a torque wrench into the rotating hole, and canceling the positioning of the locking part on the premise of ensuring that the device is in an initial state, wherein the torque wrench drives the torsion part to rotate; measuring the maximum torque of the torsion angle a of the pull torsion bar between 0 degrees and 15 degrees and between-15 degrees and 0 degrees respectively; when measuring moment, the side support and the torsion part are required to be screwed, the torsion angle is kept unchanged, and the numerical value on the moment spanner is read.
In particular, the method comprises the steps of,
In S1, the tie bar is placed on the support fixing table 32 of the torsion block and the lateral plate 5. The long pin 18 passes through the central hole of the pull torsion bar and is fixed by the long pin nut 16 and the limit sleeve 17, so that the Z-direction freedom degree is limited. The positioning pin 4 is inserted into the positioning holes on two sides of the pull torsion condition, and the degree of freedom of X, Y is limited.
In S2, the bolt 9 is inserted into the main body positioning bolt hole 311 and the bolt hole so that the torsion angle is fixed at 0 °. The torque wrench is inserted into the rectangular rotation hole 331 to ensure that the device is in an initial state. And the bolt 9 is taken down, and the torque wrench drives the torsion block 3 to rotate. And measuring the maximum torque of the pull torsion bar between 0 degrees to 15 degrees and 15 degrees to 0 degrees. When measuring moment, the nut 12 needs to be screwed to lock the torsion block 3, the angle is kept unchanged, and then the numerical value on the moment spanner is read. Repeating the measurement for a plurality of times to obtain moment values of all angles.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. A device for measuring torsional moment of a pull torsion bar of a helicopter, comprising:
The upper part of the mounting seat forms a supporting area, the supporting area is provided with a middle support positioned in the middle and side supports symmetrically arranged at two sides, and the middle support limits the Z-direction freedom degree of the pull torsion bar;
The torsion part is in rotary connection with the side support, the rotation angle a is the torsion angle of loading force, the torsion part fixes the two ends of the pull torsion bar, the torsion part and the pull torsion bar are integrated, and the X-direction freedom degree and the Y-direction freedom degree of the pull torsion bar are limited; a rotating hole of a torque wrench is preset in the torsion part;
And the locking part locks the torsion part and the side support, and the torque wrench directly measures the torque corresponding to the torsion angle through rotation.
2. The device for measuring the torsional moment of the pull torsion bar of the helicopter according to claim 1, wherein the mounting seat is a plate-shaped base (15), and a middle hole (151) for mounting the middle support and a middle support fixing hole (154) are formed in the middle of the mounting seat; a plurality of connecting holes (152) are formed on two sides of the support corresponding to the side supports.
3. Device for measuring the torsional moment of a helicopter pull rod according to claim 2, characterized in that said base (15) is provided with a weight-reducing groove (153).
4. Device for measuring the torsional moment of a helicopter pull rod according to claim 2, characterized in that said central support is a cylindrical support seat (8), the bottom surface downward projecting portion (81) of which is fitted with said central support fixing hole (154), the bottom surface of which is fixed with said base (15); the top of the device is provided with a downward concave transverse groove (82), the transverse groove (82) carries transverse plates (5) which extend to two sides and are close to the two torsion parts, the transverse plates (5) are fixed at the bottom of the transverse groove (82), and the pull torsion bars are carried on the transverse plates; the groove walls (83) at two sides of the transverse groove (82) are provided with corresponding Z-direction limiting holes (84) according to the central holes of the tension torsion bars, and the long pins (18) penetrate through the Z-direction limiting holes (84) and the central holes of the tension torsion bars to be fixed.
5. Device for measuring the torsional moment of a helicopter pull rod according to claim 4, characterized in that the external walls of the groove walls (83) are formed with a fixed plane (85).
6. The device for measuring the torsional moment of the pull torsion bar of the helicopter according to claim 2, wherein the side support adopts an arc-shaped support plate (1), the bottom surface of the arc-shaped support plate (1) is fixed with the base (15), a bearing hole (101) is formed in the horizontal direction of the top of the arc-shaped support plate, and the arc-shaped support plate is rotationally connected with the torsion part through a deep groove ball bearing (2); the lower part of the bearing hole (101) is provided with a bolt hole (102) and a limit pin hole (103).
7. Device for measuring the torsional moment of a helicopter pull rod according to claim 6, characterized in that said torsion portion is an asymmetrically shaped torsion block (3), said torsion block (3) comprising a plate-shaped torsion body (31), said torsion body (31) being provided with a support fixing table (32) near said middle support side, said support fixing table (32) fixing the ends of the pull rod; a cylindrical table (33) is arranged on one side, far away from the supporting and fixing table (32), of the torsion main body (31) and corresponds to the tension torsion bar, and a square rotating hole (331) is positioned in the cylindrical table (33) and penetrates through the upper part of the torsion main body (31); the lower part of the torsion main body (31) is provided with a main body positioning bolt hole (311) and a torsion strip hole (312).
8. Device for measuring the torsional moment of a helicopter pull rod according to claim 7, characterized in that said cylindrical table (33) is inserted into said bearing hole (101) so as to make the end face of said torsion body (31) fit with said arc-shaped support plate (1), said support fixing table (32) being vertically provided with a pull rod end fixing hole (321) fixed in position by means of a positioning pin (4); the main body positioning bolt hole (311) at the lower part of the torsion main body (31) corresponds to the bolt hole (102) and is positioned through the bolt (9), the torsion strip hole (312) corresponds to the limit pin hole (103) and is temporarily fixed through the limit pin (11) and the nut (12).
9. The device for measuring the torsional moment of a pull torsion bar of a helicopter according to claim 8, wherein the outside of the limiting pin (11) is limited by a pin (10), and wherein the bolt (9), the limiting pin (11), the nut (12) and the pin (10) are the locking parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322545167.3U CN221037763U (en) | 2023-09-19 | 2023-09-19 | Device for measuring torsional moment of pulling and twisting strip of helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322545167.3U CN221037763U (en) | 2023-09-19 | 2023-09-19 | Device for measuring torsional moment of pulling and twisting strip of helicopter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221037763U true CN221037763U (en) | 2024-05-28 |
Family
ID=91167121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322545167.3U Active CN221037763U (en) | 2023-09-19 | 2023-09-19 | Device for measuring torsional moment of pulling and twisting strip of helicopter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221037763U (en) |
-
2023
- 2023-09-19 CN CN202322545167.3U patent/CN221037763U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208155713U (en) | Loading device for Bending-Twist Vibrations fatigue test | |
| CN111795773B (en) | Large-torque sensor calibration device and calibration method | |
| CN212482784U (en) | Large-torque sensor calibration device | |
| CN112525737A (en) | Test device and test method for measuring flapping rigidity of helicopter blade | |
| CN221037763U (en) | Device for measuring torsional moment of pulling and twisting strip of helicopter | |
| CN218411653U (en) | Wind power blade fatigue test loading device based on use of linear motor | |
| CN104390737B (en) | Screwdriver slot torque test method of fastener and test device for implementing the method | |
| CN214277254U (en) | Torque measuring instrument | |
| JPH02297037A (en) | Method and device for measuring vibration of blade | |
| CN114034474B (en) | Solid rivet riveting pressure and nail hole pressure testing device and method | |
| CN217238306U (en) | Outer rotor type motor test fixture | |
| CN205898347U (en) | Wing section model rises force measuring device | |
| CN220794872U (en) | Waterproof coiled material tensile testing machine | |
| CN111256930A (en) | Work control method of steel frame shock resistance detection equipment | |
| CN217786529U (en) | Civil aircraft wing root jumbo size wallboard butt joint structure test device | |
| CN220465797U (en) | Blade lifting force testing tool | |
| CN113640096B (en) | Device for assisting in measuring nonlinear rigidity of steel wire rope | |
| CN215985138U (en) | Railway fastener fatigue testing machine for railway engineering | |
| CN217132864U (en) | Small-load Vickers hardness tester sample leveling device for bar | |
| KR19990086932A (en) | 6-Component Calibration Device | |
| CN220865674U (en) | Main rotor wing torsion detection tool | |
| CN213364421U (en) | Steel strand stretching test fixing and clamping device | |
| CN216117064U (en) | Force application mechanism and force application device with same | |
| CN114646449B (en) | Calibration method for double-clamped component balance | |
| CN210802945U (en) | Detection apparatus capable of verifying performance of steering engine under constant load working condition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |