CN214203714U

CN214203714U - Test tool

Info

Publication number: CN214203714U
Application number: CN202120181437.5U
Authority: CN
Inventors: 赵国驰; 李娜
Original assignee: Xian Longi Green Energy Architecture Technology Co Ltd
Current assignee: Longi Solar Technology Co Ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-09-14
Anticipated expiration: 2031-01-22

Abstract

The utility model provides a pair of test fixture, include: two ends of a first side edge of the first frame are respectively movably connected with two oppositely arranged target side edges of the second frame, and a plane where the first frame is located is vertical to a plane where the second frame is located; the second driving device is arranged between the first guide rail and the first frame, the label mounting plate is movably arranged on the first guide rail, and the third driving device is arranged between the first guide rail and the label mounting plate. The embodiment of the utility model provides a through 3 drive arrangement's in bottom joint regulation, realized the removal of the arbitrary direction of mark piece in the test area plane to and at the removal of the arbitrary direction of perpendicular to test area plane direction, test fixture's simple structure, convenient operation have improved efficiency of software testing on the basis of the precision of assurance test.

Description

Test tool

Technical Field

The utility model relates to a photovoltaic technology field especially relates to a test fixture.

Background

In the production and use links of the photovoltaic module, the photovoltaic module is required to be carried by test tool equipment, and the current and voltage signals of the photovoltaic module are collected through the test equipment, so that the performance of the photovoltaic module is detected.

In the prior art, a cross rod can be connected to a frame of the testing tool, a sliding plate is mounted on the cross rod, a label mounting plate is fixed on the sliding plate, a photovoltaic module is fixed on the label mounting plate, the label mounting plate is horizontally moved through manual horizontal movement of the sliding plate, and the label mounting plate is vertically moved through manual vertical movement of the cross rod, so that the photovoltaic module is tested.

However, in the testing process, the testing area where the testing tool is located needs to be changed frequently, the position of the label mounting plate needing to be placed in the testing area also changes, and the testing efficiency is low and the operation is inconvenient due to the manual operation mode at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a test fixture aims at promoting efficiency of software testing, improves the easy and simple nature of operation to test fixture.

In a first aspect, an embodiment of the present invention provides a test fixture, the test fixture includes:

the device comprises a first frame, a second frame, a first guide rail and a label mounting plate for bearing a label;

two ends of the first side edge of the first frame are respectively movably connected with two oppositely arranged target side edges of the second frame, and the plane where the first frame is located is vertical to the plane where the second frame is located; a first driving device is arranged between the first side edge and the second frame and used for driving the first frame to move along the extending direction of the target side edge;

two ends of the first guide rail are respectively movably connected with the first side edge and a second side edge opposite to the first side edge, a second driving device is arranged between the first guide rail and the first frame, and the second driving device is used for driving the first guide rail to move along the extending direction of the first side edge;

the label mounting plate is movably arranged on the first guide rail, a third driving device is arranged between the first guide rail and the label mounting plate, and the third driving device is used for driving the label mounting plate to move on the first guide rail.

Optionally, the test fixture further includes: a first screw rod and a second screw rod;

two ends of the first screw rod are respectively connected with a third side and a fourth side of the first frame, and the first screw rod is close to the first side;

two ends of the second screw rod are respectively connected with a third side and a fourth side of the first frame, and the second screw rod is close to the second side; the second driving device is further connected with the first screw rod and used for driving the first guide rail to move along the extending direction of the first side edge through the first screw rod.

Optionally, the test fixture further includes: a third screw rod;

the two ends of the third screw rod are respectively movably connected with the first screw rod and the second screw rod, the tag mounting plate is arranged on the sliding block, the sliding block is connected with the third screw rod and the first guide rail, and the third driving device is also connected with one end of the third screw rod and used for driving the sliding block to bear the tag mounting plate to move on the first guide rail through the third screw rod.

Optionally, the first driving device, the second driving device, and the third driving device include: rotating a handwheel or drive motor.

Optionally, the test fixture further includes: a transmission device; the transmission device is respectively connected with the same end of the first screw rod and the second screw rod.

Optionally, the transmission comprises: an endless chain or an endless drive belt.

Optionally, when the transmission device is the endless chain, the endless chain is respectively engaged with the same ends of the first lead screw and the second lead screw, and the second driving device further includes a sprocket engaged with the endless chain.

Optionally, in a case that the third driving device is a rotary handwheel, a first bevel gear is arranged at one end of the third screw rod, and a second bevel gear matched with the first bevel gear is arranged at the end of a short shaft of the third driving device.

Optionally, the test fixture further includes: a connecting plate and a bearing seat; the bearing seat is arranged on one side of the connecting plate;

and a short shaft of the third driving device is connected with the bearing seat, and the other side of the connecting plate is connected with one end of the third screw rod and one end of the first guide rail.

Optionally, the test fixture further includes: a second guide rail and a fourth screw rod;

the fourth screw rod is arranged on one target side edge, and the second guide rail is arranged on the other opposite target side edge;

two ends of the first side of the first frame are movably connected with the second guide rail and the fourth screw rod respectively; the first driving device is further connected with the fourth screw rod and used for driving the first frame to move along the extending direction of the target side edge through the fourth screw rod.

The embodiment of the utility model provides a pair of test fixture, include: the device comprises a first frame, a second frame, a first guide rail and a label mounting plate for bearing a label; two ends of a first side edge of the first frame are respectively movably connected with two oppositely arranged target side edges of the second frame, and a plane where the first frame is located is vertical to a plane where the second frame is located; a first driving device is arranged between the first side edge and the second frame and is used for driving the first frame to move along the extending direction of the target side edge; two ends of the first guide rail are respectively movably connected with the first side edge and a second side edge opposite to the first side edge, a second driving device is arranged between the first guide rail and the first frame, and the second driving device is used for driving the first guide rail to move along the extending direction of the first side edge; the label mounting plate is movably arranged on the first guide rail, a third driving device is arranged between the first guide rail and the label mounting plate, and the third driving device is used for driving the label mounting plate to move on the first guide rail. The embodiment of the utility model provides a through 3 drive arrangement's in bottom joint regulation, realized the removal of the arbitrary direction of mark piece in the test area plane to and at the removal of the arbitrary direction of perpendicular to test area plane direction, test fixture's simple structure, convenient operation, with low costs, on the basis of the precision of guaranteeing the test, improved efficiency of software testing.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 shows a schematic structural diagram of a testing tool in an embodiment of the present invention;

fig. 2 shows a schematic partial structure diagram of a testing tool in an embodiment of the present invention;

fig. 3 shows a schematic partial structure diagram of another testing tool in an embodiment of the present invention;

fig. 4 shows a schematic partial structure diagram of another testing tool in an embodiment of the present invention;

fig. 5 shows a schematic partial structure diagram of another testing tool in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a testing tool in an embodiment of the present invention, the testing tool includes: a first frame 10, a second frame 20, a first guide rail 30 and a label mounting plate 40 for carrying a label; further referring to fig. 2, fig. 2 shows a schematic partial structure diagram of a testing tool in an embodiment of the present invention, two ends of a first side edge a of the first frame 10 are movably connected with two oppositely disposed target side edges C of the second frame 20, respectively, and a plane where the first frame 10 is located is perpendicular to a plane where the second frame 20 is located; a first driving device 11 is arranged between the first side 10 and the second frame 20, and the first driving device 11 is used for driving the first frame 10 to move along the extending direction of the target side a; two ends of the first guide rail 30 are movably connected with the first side edge a and a second side edge B opposite to the first side edge a, respectively, a second driving device 12 is arranged between the first guide rail 30 and the first frame 10, and the second driving device 12 is used for driving the first guide rail 30 to move along the extending direction of the first side edge a; the label mounting plate 40 is movably arranged on the first guide rail 30, a third driving device 13 is arranged between the first guide rail 30 and the label mounting plate 40, and the third driving device 13 is used for driving the label mounting plate 40 to move on the first guide rail 30.

Today, photovoltaic technology is diversified gradually, and the photovoltaic module of curved surface structure also conforms to and grows, and in the homogeneity of curved surface subassembly is checked, the test fixture needs to reach following mesh: 1. the photovoltaic module is suitable for a curved surface structure. 2. Provides a convenient and simple test process.

Specifically, the irradiation uniformity test of the IV (current and voltage signal) of the photovoltaic module means that the photovoltaic module is arranged on a standard sheet mounting plate of a test tool, and the test tool and the standard sheet mounting plate are moved according to equidistant displacement in a fixed test area, and the IV test device is utilized to perform a flash simulation test on the photovoltaic module once when the photovoltaic module is moved by one position, so as to obtain the change condition of the short circuit current of the photovoltaic module at different positions, and further determine the uniformity of the light intensity of the photovoltaic module in the area. The test of the irradiation uniformity of the IV test device is not only necessary inspection of performance indexes of the photovoltaic module, but also basic guarantee of whether the photovoltaic module meets the international standard requirements, so that the test of the irradiation uniformity of the photovoltaic module has great significance.

In the embodiment of the present invention, the first frame 10 can bear the first guide rail 30, the first guide rail 30 is movably provided with a tab mounting plate 40 for bearing a tab, and the first frame 10 can be arranged on the second frame 20, by the first driving device 11, the first frame 10 can be moved along the extending direction of the target side C of the second frame 20, so as to change the position of the tab on the Z axis, by the second driving device 12, the first guide rail 30 can be moved along the extending direction of the first side a of the first frame 10, so as to change the position of the tab on the X axis, by the third driving device 13, the tab mounting plate 40 can be moved on the first guide rail 30, so as to change the position of the tab on the Y axis, the test tool provided by the embodiment of the present invention can be driven by the driving device, so as to quickly and conveniently realize the tab on the X axis, Y, Z, and the position in the axial direction is changed so as to meet the requirement of the irradiation uniformity test.

Furthermore, under the condition that the photovoltaic module is of a curved surface structure, the patch mounting plate can perform movement test in the test area according to the coordinates of each point to be tested on the curved surface photovoltaic module, and the movement of the patch mounting plate is mainly realized by adjusting the driving devices respectively corresponding to X, Y, Z axes in the test area, so that the X, Y, Z-axis coordinates of the position where the patch mounting plate moves correspond to the X, Y, Z coordinates of each point to be tested on the curved surface photovoltaic module one by one.

In the using process, the testing range of the curved surface photovoltaic assembly in the testing area and the three-axis coordinate of each point to be tested on the curved surface photovoltaic assembly in the testing area are determined by projecting the curved surface photovoltaic assembly into the testing area, and further, each point to be tested can be tested in the testing area by adopting a label carried by a label mounting plate, referring to fig. 3, fig. 3 shows a schematic view of a local structure of another testing tool in the embodiment of the utility model, a label 41 can be arranged on a label mounting plate 40, the label mounting plate can divide the curved surface photovoltaic assembly to be tested into a plurality of continuous areas, the splicing area of the continuous areas is the area of the curved surface photovoltaic assembly, the central point of each block has a corresponding X, Y, Z coordinate value in the testing area, and the tool is respectively provided with a driving device aiming at the X, Y, Z axis in the testing area, the positions of the standard plate mounting plates in the three axial directions in the test area are moved through the driving devices in all axial directions, the positions of the standard plate mounting plates in the test area are determined through the coordinate parameters of the curved surface component X, Y, Z at the central point of the corresponding block, surface blackening treatment can be further performed on the surface of the test tool in order to prevent the reflection of light from influencing the test, and the test tool is fixedly placed at one end of the light receiving side of the IV test device when in use.

The determination process of the test area of the curved photovoltaic module comprises the following steps: for the side-lighting IV simulator, the size of the curved surface photovoltaic assembly can be determined before testing, then the mounting plate of the mark sheet is adjusted to be approximately on the same straight line with a light source to serve as an original point position, then the X direction and the Y direction are symmetrical to the original point position, and scribing is respectively carried out on the frames of the IV simulator corresponding to the X-, the X-direction, the Y-direction and the Y-direction, so that the length of the X direction is equal to the length of the curved surface photovoltaic assembly, and the length of the Y direction is equal to the width of the curved surface photovoltaic assembly. And finally, scribing on the frame of the IV simulator corresponding to the Z + and the Z-to ensure that the length in the Z direction is equal to the thickness of the curved surface photovoltaic assembly, thereby calibrating the test range of the curved surface photovoltaic assembly on the frame of the IV simulator.

In an implementation mode, the driving device can be a rotary hand wheel, and the mark piece mounting plate in the test area is moved in the three axial upward positions through each axial rotary hand wheel, the rotary hand wheel is arranged to be convenient for operation, and the number of rotation turns of the rotary hand wheel can be associated with the distance moved by the mark piece mounting plate, so that the requirement of the mark piece mounting plate for quick and accurate positioning in the test area can be met, the test tool is simple in structure, convenient to operate and low in cost, and the test efficiency is improved on the basis of ensuring the test accuracy.

Optionally, referring to fig. 1, the test fixture further includes: a first lead screw 51, a second lead screw 52; two ends of the first lead screw 51 are respectively connected with the third side and the fourth side of the first frame 10, and the first lead screw 51 is close to the first side a; two ends of the second screw 52 are respectively connected with the third side and the fourth side of the first frame 10, and the second screw 52 is close to the second side B; the second driving device 12 is further connected to the first lead screw 51, and is used for driving the first guide rail 30 to move along the extending direction of the first side a through the first lead screw 51.

In the embodiment of the present invention, the test fixture drives the first screw rod 51 through the first screw rod 51, the second screw rod 52 and the second driving device 12, which are disposed in the first frame 10 and extend along the X direction, to move the position of the first guide rail 30 in the X axis direction.

Optionally, referring to fig. 4, the test fixture further includes: a transmission 60; the transmission 60 is connected to the same ends of the first and

second lead screws

51 and 52, respectively. The embodiment of the present invention provides an embodiment, when the second driving device 12 drives the first lead screw 51, in order to achieve the purpose of transmitting the driving force to the second lead screw 52, the transmission device 60 can be set to be connected with the same end of the first lead screw 51 and the second lead screw 52 respectively, so that when the second driving device 12 drives the first lead screw 51, the first lead screw 51 can transmit the received driving force to the second lead screw 52 through the transmission device 60, thereby driving the second lead screw 52 to move.

Optionally, the transmission 60 comprises: an endless chain or an endless drive belt.

In particular, the transmission 60 comprises an endless chain or an endless belt, both of which serve the purpose of transmitting the driving force from one end to the other.

Alternatively, referring to fig. 4, in the case that the transmission 60 is an endless chain, the endless chain is engaged with the same ends of the first lead screw and the second lead screw, respectively, and the second driving device 12 further includes a sprocket 121, and the sprocket 121 is engaged with the endless chain.

In one implementation of the embodiment of the present invention, under the condition that the transmission device 60 is an endless chain, the endless chain can form a force transmission structure by engaging with the sprocket 121, and at this time, the output end of the second driving device 12 can be connected to the sprocket 121, so as to drive the endless chain to move through the sprocket 121.

Optionally, referring to fig. 1, the test fixture further includes: a third lead screw 53; two ends of the third screw 53 are movably connected with the first screw 51 and the second screw 52, respectively, further referring to fig. 3, the tag mounting plate 40 is disposed on the slider 70, the slider 70 is connected with the third screw 53 and the first guide rail 30, and the third driving device 13 is further connected with one end of the third screw 53, and is configured to drive the slider 70 to bear the tag mounting plate 40 to move on the first guide rail 30 through the third screw 53.

Specifically, the Y direction is a vertical direction, the vertical direction is fixed on the nut supports of the first lead screw 51 and the second lead screw 52 which are arranged in the horizontal direction by the third lead screw 53 through the lead screw seats at the two ends, the tag mounting plate 40 is installed on the third lead screw 53, the tag to be tested is fixed on the tag mounting plate 40, the fixing seat mounting plates are arranged below the lead screw seats at the two ends of the third lead screw 53, the guide rail bottom plate and the first guide rail 30 are installed on the two fixing seat mounting plates 13 at the upper and the lower ends, and the tag mounting plate 40 and the slider 70 are connected and fixed between the slider 70 and the tag mounting plate 40 by the tag mounting plate support.

In another implementation mode, the driving device can be a driving motor, driving force is provided through the driving motor to replace a rotating hand wheel, the same using effect can be achieved, in addition, the driving motor is used, the positioning accuracy can be higher, the speed is higher, and automatic control can be achieved by adding a corresponding control system.

Alternatively, referring to fig. 5 and fig. 5, which are partial schematic structural diagrams of another testing tool in an embodiment of the present invention, in a case that the third driving device 13 is a rotating hand wheel, one end of the third lead screw 53 is provided with a first bevel gear 81, and a short shaft end of the third driving device 13 is provided with a second bevel gear 82 matched with the first bevel gear 81.

Optionally, referring to fig. 5, the test fixture further includes: a connecting plate 83 and a bearing seat 84; the bearing housing 84 is provided at one side of the connecting plate 83, the stub shaft of the third driving device 13 is connected to the bearing housing 84, and the other side of the connecting plate 83 is connected to one end of the third lead screw 53 and one end of the first guide rail 30.

The embodiment of the utility model provides an in, under the condition of third drive arrangement 13 for rotatory hand wheel, for the regulation of the convenient Y direction, conical gear is all installed to the bottom of third lead screw 53 and third drive arrangement 13's minor axis one end, form the transmission of right angle alternating axis like this, the transmission of awl tooth effectively prevents the risk that the lead screw reversal brought, third drive arrangement 13's minor axis sets up on bearing frame 84, bearing frame 84 installs on connecting plate 83, and on the same principle, can make the mark piece mounting panel rule with IV simulator left side frame lower part and align, from the bottom up test in proper order to IV simulator left side frame upper portion line position, rotatory every turn of round of hand wheel then a pitch of marcing of load on the screw-nut, every unit definition of marcing is a vertical position, the width of curved surface subassembly has just been simulated through a plurality of vertical position like this.

Optionally, referring to fig. 2, the test fixture further includes: a second guide 90 and a fourth lead screw 54; the fourth screw 54 is provided on one target side C, and the second guide rail 90 is provided on the other target side C opposite thereto; two ends of the first side a of the first frame 10 are movably connected with the second guide rail 90 and the fourth screw 54 respectively; the first driving device 11 is also connected to a fourth lead screw 54 for driving the first frame 10 to move along the extending direction of the target side C through the fourth lead screw 54.

In the embodiment of the present invention, the Z direction is the direction of horizontal back-and-forth movement, the Z direction is connected to the second frame 20 through the screw nut bracket on the fourth screw 54 by the first frame 10, and the second guide rail 90 and the slider are supported at the other end and connected to the second frame 20 through the support. A first driving device 11 is installed at one end of the fourth screw rod 54, the first frame 10 moves back and forth in the Z direction through the first driving device 11, and in the case that the first driving device 11 is a rotary hand wheel, the upper surface or the lower surface of the end face of the frame of the IV simulator is used as a reference, and the first frame 10 integrally advances by one pitch every time the rotary hand wheel rotates by one circle, which can be set according to the Z coordinate value of the curved photovoltaic module at the central point of the position.

Specifically, the test flow based on the test fixture includes:

step 1: and placing the test tool on the light receiving surface of the IV simulator to enable the central point of the target mounting plate and the light source to be basically on the same straight line.

Step 2: and installing a mark sheet on the test tool.

And step 3: the test range is determined according to the size of the photovoltaic module, and the IV simulator frame is marked by scribing lines.

And 4, step 4: and moving the label mounting plate to the initial position. The coordinate value of the central position of the target is adjusted by the driving device.

And 5: the IV test equipment performs a first IV test on the plaques.

Step 6: and positioning the second position of the target mounting plate. The second position of the target is adjusted by the driving means according to the distance to be moved in each direction.

And 7: the IV test equipment performs a second IV test on the plaques.

And 8: and (5) sequentially testing the third position, the fourth position and the last position in step 6.

The test fixture is characterized in that the test fixture is vertically placed, a light source is perpendicularly projected into a test area from the side face of the test fixture, the upper light projection test fixture is horizontally placed, the light source is perpendicularly projected into the test area from the position right above the test fixture, the test principle of the upper light projection type IV simulator curved surface assembly IV uniformity test fixture is the same as that of side light projection, curved surface photovoltaic assemblies are projected in the test area, the test range of the curved surface photovoltaic assemblies is determined, the projection area is divided into a plurality of continuous small areas which are the same as standard pieces, the standard pieces are adopted to carry out IV test on three-dimensional coordinate points at the centers of the small areas, and therefore the irradiation uniformity test of the curved surface assembly IV test equipment is achieved.

The utility model provides a frock structure, joint regulation through 3 drive arrangement in bottom, the arbitrary removal of mark piece in the test area plane has been realized, and remove wantonly at the regional plane direction of perpendicular to test, need not artifical direct contact mark piece, in addition, the rotatory number of turns that can also pass through drive arrangement location mark piece is in X, Y, Z three not coaxial position, need not the manual work and rule or measure the position with the measuring tool, and finally, Z is to the mode that the removal adopted the whole frame to remove, avoid Z to remove the risk that needs the artifical operation of climbing height.

In summary, in the embodiment of the present invention, include: the device comprises a first frame, a second frame, a first guide rail and a label mounting plate for bearing a label; two ends of a first side edge of the first frame are respectively movably connected with two oppositely arranged target side edges of the second frame, and a plane where the first frame is located is vertical to a plane where the second frame is located; a first driving device is arranged between the first side edge and the second frame and is used for driving the first frame to move along the extending direction of the target side edge; two ends of the first guide rail are respectively movably connected with the first side edge and a second side edge opposite to the first side edge, a second driving device is arranged between the first guide rail and the first frame, and the second driving device is used for driving the first guide rail to move along the extending direction of the first side edge; the label mounting plate is movably arranged on the first guide rail, a third driving device is arranged between the first guide rail and the label mounting plate, and the third driving device is used for driving the label mounting plate to move on the first guide rail. The embodiment of the utility model provides a through 3 drive arrangement's in bottom joint regulation, realized the removal of the arbitrary direction of mark piece in the test area plane to and at the removal of the arbitrary direction of perpendicular to test area plane direction, test fixture's simple structure, convenient operation, with low costs, on the basis of the precision of guaranteeing the test, improved efficiency of software testing.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention essentially or the portions contributing to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), and includes a plurality of instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a test fixture which characterized in that, test fixture includes:

2. The test tool of claim 1, further comprising: a first screw rod and a second screw rod;

3. The test tool of claim 2, further comprising: a third screw rod;

4. The test tool according to any one of claims 1 to 3, wherein the first driving device, the second driving device and the third driving device comprise: rotating a handwheel or drive motor.

5. The test tool of claim 2, further comprising: a transmission device; the transmission device is respectively connected with the same end of the first screw rod and the second screw rod.

6. The test fixture of claim 5, wherein the transmission comprises: an endless chain or an endless drive belt.

7. The test tool according to claim 6, wherein in the case that the transmission device is the endless chain, the endless chain is engaged with the same ends of the first lead screw and the second lead screw, respectively, and the second driving device further comprises a sprocket engaged with the endless chain.

8. The test tool according to claim 3, wherein in the case that the third driving device is a rotating handwheel, a first bevel gear is arranged at one end of the third screw rod, and a second bevel gear matched with the first bevel gear is arranged at the tail end of a short shaft of the third driving device.

9. The test tool of claim 8, further comprising: a connecting plate and a bearing seat; the bearing seat is arranged on one side of the connecting plate;

10. The test tool of claim 1, further comprising: a second guide rail and a fourth screw rod;