Test device

Abstract

According to the test device disclosed by the invention, a cable to be tested passes through the test port of the test seat, and is connected with the test cable through the first load mechanism and drives the test cable to do axial linear motion, so that the purpose of reciprocating linear friction test can be achieved; the second load mechanism is connected with the test cable and drives the test cable to conduct arc motion around the central axis of the test port, the purpose of reciprocating arc cutting friction can be achieved, and the third load mechanism is connected with the test cable and drives the test cable to conduct linear motion in the direction perpendicular to the axial direction of the test port. According to the test device, the aim of accelerating the collision and striking test can be achieved, and in general, the test device can simulate various working conditions such as friction, collision and vibration striking possibly encountered by a cable with a cable protection material in actual use, so that a designer can quickly verify the wear resistance of the cable protection material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of working condition simulation test, in particular to a test device. BACKGROUND

[0002] In the field of aviation, the protection of cables is of great importance, because the integrity and stability of cables are directly related to the safe operation of aircraft. At present, whether in installation and maintenance or in the process of aircraft flight, the cables are prone to wear or impact damage when passing through the fuselage frame. For example, during the installation and maintenance of electrical cables, the cables are inevitably subjected to friction and collision due to the operation of personnel (dragging, swinging, lifting, etc.); or during the flight of the aircraft, the electrical cables are constantly vibrating and impacting the aircraft mechanism. Cable protection materials are widely used in cable protection and aircraft structure protection due to their excellent high and low temperature resistance, aging resistance and wear resistance. However, there is currently no research on the durability of cable protection materials to friction and impact, especially accelerated friction, impact and vibration durability function testing, and there is still a lack of standardized test fixtures and efficient test schemes.

[0003] Based on the above reasons, there is a need for a means that can simulate various friction, impact and vibration that cable protection materials may encounter in actual use. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a test device that can simulate various friction, impact and vibration that cables with cable protection materials may encounter in actual use, so as to facilitate designers to quickly verify the wear resistance of cable protection materials.

[0005] The embodiments of the present application can be implemented as follows:

[0006] In a first aspect, the utility model provides a test device, including test seat, first load mechanism, second load mechanism and third load mechanism;

[0007] The test seat is provided with a through test port, and the test port is used for passing through the test cable;

[0008] The first load mechanism is used to drive the test cable to move linearly along the axial direction of the test port when connected with the test cable;

[0009] The second load mechanism is used to drive the test cable to move in an arc around the central axis of the test port when connected with the test cable;

[0010] The third load mechanism is used to drive the test cable to move linearly along the direction perpendicular to the axial direction of the test port when connected with the test cable.

[0011] In an optional embodiment, the first load mechanism comprises a first fixed plate, a first motor and a first transmission assembly;

[0012] The first motor is fixed to the first fixed plate;

[0013] The first transmission assembly is connected with the first motor, and the first transmission assembly is further used to connect with the test cable to transmit the driving force provided by the first motor to the test cable.

[0014] In an optional embodiment, the first motor can provide torque;

[0015] The first transmission assembly comprises a first crank and a first moving rod;

[0016] One end of the first crank is in driving connection with the first motor;

[0017] The first moving rod is arranged on the first fixed plate and can move linearly along the axial direction of the test port, one end of the first moving rod is rotatably connected to the first crank and can linearly slide relative to the first crank, and the other end of the first moving rod is used to connect with the test cable.

[0018] In an optional embodiment, the first crank is provided with a first limiting long slot, and a first hinged shaft is slidingly fitted in the first limiting long slot, and one end of the first moving rod is connected with the first hinged shaft;

[0019] and / or,

[0020] The first load mechanism further comprises a first linear bearing, the first linear bearing is fixed to the first fixed plate, and the first moving rod is arranged in the first linear bearing.

[0021] In an optional embodiment, the second load mechanism comprises a second fixed plate, a second motor and a second transmission assembly;

[0022] The second motor is fixed to the second fixed plate;

[0023] The second transmission assembly is connected with the second motor, and the second transmission assembly is further used to connect with the test cable to transmit the driving force provided by the second motor to the test cable.

[0024] In an optional embodiment, the second motor can provide torque;

[0025] The second transmission assembly comprises a second crank, a first rocker and a second rocker;

[0026] One end of the second crank is in driving connection with the second motor;

[0027] One end of the first rocker is rotatably connected to the second crank and is capable of linear sliding relative to the second crank, and the other end of the first rocker is rotatably connected to the second rocker;

[0028] One end of the second rocker is rotatably connected to the second fixed plate, and the rotation axis is perpendicular to the axial direction of the test port, and the other end of the second rocker is used for connecting with the test cable.

[0029] In an optional embodiment, the second crank is provided with a second limiting long slot, and a second hinged shaft is slidingly fitted in the second limiting long slot, and one end of the first rocker is connected to the second hinged shaft.

[0030] In an optional embodiment, the third load mechanism comprises a third fixed plate, a third motor, and a third transmission assembly.

[0031] The third motor is fixed to the third fixed plate.

[0032] The third transmission assembly is connected with the third motor, and the third transmission assembly is also used for connecting with the test cable to transmit the driving force provided by the third motor to the test cable.

[0033] In an optional embodiment, the third motor is capable of providing torque.

[0034] The third transmission assembly comprises a third crank and a second moving rod.

[0035] One end of the third crank is drivingly connected with the third motor.

[0036] The second moving rod is arranged on the third fixed plate and is capable of linear moving in a direction perpendicular to the axial direction of the test port, one end of the second moving rod is rotatably connected to the third crank and is capable of linear sliding relative to the third crank, and the other end of the second moving rod is used for connecting with the test cable.

[0037] In an optional embodiment, the third crank is provided with a third limiting long slot, and a third hinged shaft is slidingly fitted in the third limiting long slot, and one end of the second moving rod is connected to the third hinged shaft.

[0038] and / or,

[0039] The third load mechanism further comprises a second linear bearing, the second linear bearing is fixed to the third fixed plate, and the second moving rod is arranged in the second linear bearing.

[0040] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:

[0041] The cable to be tested is passed through the test port of the test seat, connected with the test cable through the first load mechanism and driven to move axially and linearly, so as to achieve the purpose of reciprocating linear friction test, connected with the test cable through the second load mechanism and driven to move in an arc around the central axis of the test port, so as to achieve the purpose of reciprocating arc cutting friction, connected with the test cable through the third load mechanism and driven to move linearly in a direction perpendicular to the axis of the test port, so as to achieve the purpose of accelerated collision impact test. In summary, through the test device, various friction, collision and vibration impact conditions that the cable with cable protection material may encounter in actual use can be simulated, so as to quickly verify the wear resistance of the cable protection material by the designer. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0043] Fig. 1 A schematic diagram of the test device of the embodiment of the present application for simulating reciprocating linear friction condition;

[0044] Fig. 2 A schematic diagram of the test device of the embodiment of the present application for simulating reciprocating arc cutting friction condition;

[0045] Fig. 3 A schematic diagram of the test device of the embodiment of the present application for simulating accelerated collision impact condition.

[0046] Figure: 10-test seat; 11-test port; 20-first load mechanism; 21-first fixed plate; 22-first motor; 23-first transmission assembly; 230-first crank; 231-first moving rod; 232-first limiting long groove; 233-first hinged shaft; 234-first linear bearing; 30-second load mechanism; 31-second fixed plate; 32-second motor; 33-second transmission assembly; 330-second crank; 331-first rocker; 332-second rocker; 333-second limiting long groove; 334-second hinged shaft; 40-third load mechanism; 41-third fixed plate; 42-third crank; 43-third transmission assembly; 430-third motor; 431-second moving rod; 432-third limiting long groove; 433-third hinged shaft; 434-second linear bearing; 50-test cable; 60-fixed support; 61-supporting groove. DETAILED DESCRIPTION

[0047] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0049] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0050] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0052] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] Some embodiments of the present application will be described in detail with reference to the drawings. The following embodiments and features described below can be combined with each other in the case of no conflict.

[0054] Reference Figs. 1 to 3 The embodiments of the present application disclose a test device, which comprises a test seat 10, a first load mechanism 20, a second load mechanism 30 and a third load mechanism 40.

[0055] The test seat 10 is provided with a test port 11 penetrating through, which is used for the test cable 50 to pass through;

[0056] The first load mechanism 20 is used for driving the test cable 50 to make linear motion along the axial direction of the test port 11 when connected with the test cable 50;

[0057] The second load mechanism 30 is used for driving the test cable 50 to make arc motion around the central axis of the test port 11 when connected with the test cable 50;

[0058] The third load mechanism 40 is used for driving the test cable 50 to make linear motion along the direction perpendicular to the axial direction of the test port 11 when connected with the test cable 50.

[0059] In this way, the cable to be tested is passed through the test port 11 of the test seat 10, connected with the test cable 50 by the first load mechanism 20 and driven to make linear motion along the axial direction, so that the reciprocating linear friction test can be achieved, connected with the test cable 50 by the second load mechanism 30 and driven to make arc motion around the central axis of the test port 11, so that the reciprocating arc cutting friction test can be achieved, connected with the test cable 50 by the third load mechanism 40 and driven to make linear motion along the direction perpendicular to the axial direction of the test port 11, so that the accelerated collision impact test can be achieved. In summary, the test device can simulate various friction, collision and vibration impact conditions that the cable with cable protection material may encounter in actual use, so as to quickly verify the wear resistance of the cable protection material.

[0060] It should be noted that the first load mechanism 20, the second load mechanism 30 and the third load mechanism 40 can be simultaneously connected with different parts of the test cable 50, so as to realize the synchronous performance of the reciprocating linear friction test, the reciprocating arc cutting friction test and the accelerated collision impact test. Of course, the first load mechanism 20, the second load mechanism 30 and the third load mechanism 40 can also be any one connected with the test cable 50, and the reciprocating linear friction test, the reciprocating arc cutting friction test and the accelerated collision impact test are alternately performed. The specific selection can be flexible according to the actual demand, and the present application does not limit this.

[0061] In the embodiment, the testing device further comprises a fixing support 60 having a supporting groove 61 for placing the testing cable 50 to facilitate the leveling of the testing cable 50.

[0062] The testing seat 10 is in a hollow structure, and opposite two side walls of the testing seat 10 are provided with testing ports 11 to simulate the working condition that the cable passes through two frames at the same time. Of course, the specific number of the testing ports 11 is not limited to the example of two, and can be one or more than three.

[0063] The shape of the testing port 11 is not specifically limited, for example, the testing port 11 is circular as shown in the figure, and can also be polygonal and the like.

[0064] In combination Fig. 1 The first load mechanism 20 comprises a first fixed plate 21, a first motor 22 and a first transmission assembly 23. The first fixed plate 21 is in a rectangular shape, and the thickness direction of the first fixed plate 21 is the same as the axial direction of the testing port 11. The first motor 22 is fixed to the first fixed plate 21. The first transmission assembly 23 is connected with the first motor 22, and the first transmission assembly 23 is further used to be connected with the testing cable 50 to transmit the driving force provided by the first motor 22 to the testing cable 50 to drive the testing cable 50 to perform the reciprocating linear motion in the axial direction of the testing port 11, so as to realize the reciprocating linear friction test.

[0065] Specifically, the first motor 22 is a rotor motor capable of providing torque. The first transmission assembly 23 comprises a first crank 230 and a first moving rod 231. One end of the first crank 230 is in transmission connection with the first motor 22. The first moving rod 231 is arranged on the first fixed plate 21 and can move linearly in the axial direction of the testing port 11. One end of the first moving rod 231 is rotatably connected to the first crank 230 and can slide linearly relative to the first crank 230. The other end of the first moving rod 231 is used to be connected with the testing cable 50. In this way, the first crank 230 and the first moving rod 231 form a structure similar to a crank slider mechanism, so that the first moving rod 231 is driven to perform the reciprocating linear motion in the axial direction of the testing port 11 by the first crank 230 driven to rotate by the first motor 22.

[0066] In order to realize the rotatable and slidable connection of the first moving rod 231 and the first crank 230, the first crank 230 is provided with a first limiting long slot 232, the length direction of the first limiting long slot 232 is the same as the length direction of the first crank 230, the first limiting long slot 232 has a first hinged shaft 233 in sliding fit, and one end of the first moving rod 231 is connected with the first hinged shaft 233.

[0067] In order to limit the first moving rod 231 to only straight line movement in a single direction, and to ensure movement accuracy, the first load mechanism 20 further comprises a first linear bearing 234 fixed to the first fixed plate 21, and the first moving rod 231 is arranged through the first linear bearing 234, and the first linear bearing 234 can also improve the smoothness of the reciprocating straight line movement of the first moving rod 231, and reduce friction.

[0068] Of course, in some embodiments, the first transmission assembly 23 can also be a worm gear mechanism, a gear rack mechanism, a screw transmission mechanism, or other transmission mechanisms capable of converting torque into straight line driving force. The first motor 22 can also be a linear motor or other components capable of providing straight line driving force, and the first transmission assembly 23 can be a connecting rod or the like, and the mover can also achieve reciprocating linear motion by connecting the test cable 50 through the first transmission assembly 23.

[0069] In combination Fig. 2 The second load mechanism 30 comprises a second fixed plate 31, a second motor 32 and a second transmission assembly 33; the second fixed plate 31 is generally rectangular, and the thickness direction is the same as the axial direction of the test port 11, and the second motor 32 is fixed to the second fixed plate 31; the second transmission assembly 33 is connected with the second motor 32, and the second transmission assembly 33 is also used to connect with the test cable 50, so as to transmit the driving force provided by the second motor 32 to the test cable 50, so as to drive the test cable 50 to perform reciprocating arc movement around the central axis of the test port 11, thereby realizing reciprocating arc cutting friction test.

[0070] Specifically, the second motor 32 is a rotor motor capable of providing torque; the second transmission assembly 33 comprises a second crank 330, a first rocker 331 and a second rocker 332; one end of the second crank 330 is in transmission connection with the second motor 32; one end of the first rocker 331 is rotatably connected with the second crank 330, and can slide linearly relative to the second crank 330, and the other end of the first rocker 331 is rotatably connected with the second rocker 332; one end of the second rocker 332 is rotatably connected with the second fixed plate 31, and the rotation axis is perpendicular to the axial direction of the test port 11, and the other end of the second rocker 332 is used to connect with the test cable 50. In this way, the second crank 330, the first rocker 331 and the second rocker 332 form a structure similar to a crank rocker mechanism, so as to amplify the torque of the first motor 22 and transmit it to the test cable 50, so that the test cable 50 performs reciprocating arc movement.

[0071] The second crank 330 is provided with a second limiting long slot 333, the length direction of the second limiting long slot 333 is the same as the length direction of the second crank 330, and the second limiting long slot 333 is provided with a second hinge shaft 334 in sliding fit. One end of the first rocker 331 is connected with the second hinge shaft 334.

[0072] Of course, in some embodiments, the second transmission assembly 33 can also be a swing lever mechanism, a hinge four-bar mechanism, or other transmission mechanisms capable of amplifying torque. The second motor 32 can also be a linear motor or other components capable of providing linear driving force, and the second transmission assembly 33 can also be a rack and pinion mechanism, a rocker slider mechanism, or other transmission mechanisms capable of converting linear driving force into torque.

[0073] In combination Fig. 3 The third load mechanism 40 includes a third fixed plate 41, a third motor 430, and a third transmission assembly 43. The third fixed plate 41 is rectangular, and the thickness direction thereof is perpendicular to the axial direction of the test port 11. The third motor 430 is fixed to the third fixed plate 41. The third transmission assembly 43 is connected with the third motor 430, and is further used to be connected with the test cable 50 to transmit the driving force provided by the third motor 430 to the test cable 50 to drive the test cable 50 to perform reciprocating linear motion in a direction perpendicular to the axial direction of the test port 11 (i.e., in the radial direction of the test port 11), thereby achieving the accelerated impact test.

[0074] The third motor 430 is a rotor motor capable of providing torque. The third transmission assembly 43 includes a third crank 42 and a second moving rod 431. One end of the third crank 42 is in transmission connection with the third motor 430. The second moving rod 431 is arranged on the third fixed plate 41 and can move linearly in a direction perpendicular to the axial direction of the test port 11. One end of the second moving rod 431 is rotatably connected to the third crank 42 and can slide linearly relative to the third crank 42. The other end of the second moving rod 431 is used to be connected with the test cable 50. In this way, the third crank 42 and the second moving rod 431 form a structure similar to a crank slider mechanism, so that the second moving rod 431 is driven to perform reciprocating linear motion in the radial direction of the test port 11 by the third crank 42 driven to rotate by the third motor 430.

[0075] In order to realize the rotatable and slidable connection between the second moving rod 431 and the third crank 42, the third crank 42 is provided with a third limiting long slot 432, and the third limiting long slot 432 is provided with a third hinge shaft 433 in sliding fit. One end of the second moving rod 431 is connected with the third hinge shaft 433.

[0076] In order to limit the second moving rod 431 to only be able to move in a single direction, ensure the accuracy of the movement, the third load mechanism 40 further comprises a second linear bearing 434 fixed to the third fixed plate 41, and the second moving rod 431 passes through the second linear bearing 434, and the second linear bearing 434 can also improve the smoothness of the reciprocating linear motion of the second moving rod 431, and reduce the friction.

[0077] Of course, in some embodiments, the third transmission assembly 43 can also be a worm gear mechanism, a gear rack mechanism, a screw transmission mechanism, or other transmission mechanisms that can convert torque into linear driving force. The third motor 430 can also be a linear motor or other components that can provide linear driving force, and the third transmission assembly 43 can be a connecting rod or the like. The mover can also achieve reciprocating linear motion by connecting the test cable 50 through the third transmission assembly 43.

[0078] It should be noted that the connection mode of the first moving rod 231, the second moving rod 431 and the second rocker 332 with the test cable 50 can be achieved by clamping, that is, a clamp is installed at the end of the first moving rod 231, the second moving rod 431 or the second rocker 332, and the test cable 50 is clamped by the clamp.

[0079] In summary, the test device disclosed in the embodiments of the present application can achieve the purpose of reciprocating linear friction test by passing the cable to be tested through the test port 11 of the test seat 10, connecting the test cable 50 through the first load mechanism 20 and driving the test cable 50 to move axially, the purpose of reciprocating arc cutting friction can be achieved by connecting the test cable 50 through the second load mechanism 30 and driving the test cable 50 to move in an arc around the central axis of the test port 11, and the purpose of accelerated collision impact test can be achieved by connecting the test cable 50 through the third load mechanism 40 and driving the test cable 50 to move linearly in a direction perpendicular to the test port 11. In summary, the test device can simulate various friction, collision and vibration impact conditions that the cable with cable protection material may encounter in actual use, so as to quickly verify the wear resistance of the cable protection material by the designer.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A test device, characterized in that It comprises a test seat (10), a first loading mechanism (20), a second loading mechanism (30) and a third loading mechanism (40); The test seat (10) is provided with a penetrating test port (11), and the test port (11) is used for allowing the test cable (50) to pass through; The first load mechanism (20) is used to drive the test cable (50) to perform linear motion along the axial direction of the test port (11) when connected to the test cable (50); The second load mechanism (30) is used to drive the test cable (50) to perform arc motion around the central axis of the test port (11) when connected to the test cable (50); The third load mechanism (40) is used to drive the test cable (50) to perform linear motion along a direction perpendicular to the axial direction of the test port (11) when connected to the test cable (50).

2. The test device of claim 1, wherein, The first load mechanism (20) includes a first fixing plate (21), a first motor (22) and a first transmission assembly (23); The first motor (22) is fixed to the first fixing plate (21); The first transmission assembly (23) is connected to the first motor (22), and the first transmission assembly (23) is also used to connect to the test cable (50) to transmit the driving force provided by the first motor (22) to the test cable (50).

3. The test device of claim 2, wherein, The first motor (22) is capable of providing torque; The first transmission assembly (23) includes a first crank (230) and a first moving rod (231); One end of the first crank (230) is in driving connection with the first motor (22); The first moving rod (231) is arranged on the first fixing plate (21) and can move linearly along the axial direction of the test port (11); one end of the first moving rod (231) is rotatably connected to the first crank (230) and can slide linearly relative to the first crank (230); the other end of the first moving rod (231) is used to connect to the test cable (50).

4. The test device of claim 3, wherein The first crank (230) is provided with a first position-limiting long slot (232), a first hinge shaft (233) is provided in the first position-limiting long slot (232), and one end of the first moving rod (231) is connected to the first hinge shaft (233); and / or, The first load mechanism (20) further includes a first linear bearing (234), the first linear bearing (234) being fixed to the first fixing plate (21), and the first moving rod (231) being passed through the first linear bearing (234).

5. The test device of claim 1, wherein The second load mechanism (30) includes a second fixing plate (31), a second motor (32) and a second transmission assembly (33); The second motor (32) is fixed to the second fixing plate (31); The second transmission assembly (33) is connected to the second motor (32), and the second transmission assembly (33) is also used to connect to the test cable (50) to transmit the driving force provided by the second motor (32) to the test cable (50).

6. The test device of claim 5, wherein The second motor (32) can provide torque; The second transmission assembly (33) comprises a second crank (330), a first rocker (331) and a second rocker (332); One end of the second crank (330) is in driving connection with the second motor (32); One end of the first rocker (331) is rotatably connected with the second crank (330) and can linearly slide relative to the second crank (330), and the other end of the first rocker (331) is rotatably connected with the second rocker (332); One end of the second rocker (332) is rotatably connected with the second fixed plate (31) and the rotation axis is perpendicular to the axial direction of the test port (11), and the other end of the second rocker (332) is used for connecting with the test cable (50).

7. The test device of claim 6, wherein The second crank (330) is provided with a second limiting long slot (333), and a second hinge shaft (334) is slidingly fitted in the second limiting long slot (333), and one end of the first rocker (331) is connected with the second hinge shaft (334).

8. The test device of claim 1, wherein, The third load mechanism (40) comprises a third fixed plate (41), a third motor (430) and a third transmission assembly (43); The third motor (430) is fixed to the third fixed plate (41); The third transmission assembly (43) is connected with the third motor (430), and the third transmission assembly (43) is also used for connecting with the test cable (50) to transmit the driving force provided by the third motor (430) to the test cable (50).

9. The test device of claim 8, wherein, The third motor (430) can provide torque; The third transmission assembly (43) comprises a third crank (42) and a second moving rod (431); One end of the third crank (42) is in driving connection with the third motor (430); The second moving rod (431) is arranged on the third fixed plate (41) and can linearly move in a direction perpendicular to the axial direction of the test port (11), one end of the second moving rod (431) is rotatably connected with the third crank (42) and can linearly slide relative to the third crank (42), and the other end of the second moving rod (431) is used for connecting with the test cable (50).

10. The test device of claim 9, wherein, The third crank (42) is provided with a third limiting long slot (432), and a third hinge shaft (433) is slidingly fitted in the third limiting long slot (432), and one end of the second moving rod (431) is connected with the third hinge shaft (433); And / or, The third load mechanism (40) further comprises a second linear bearing (434), the second linear bearing (434) is fixed to the third fixed plate (41), and the second moving rod (431) penetrates through the second linear bearing (434).

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