CN113510738B

CN113510738B - Mechanical arm of testing device

Info

Publication number: CN113510738B
Application number: CN202110341977.XA
Authority: CN
Inventors: 蒋能强; 潘任锋; 伍雪环
Original assignee: Shenzhen Dti Technology Detection Co ltd
Current assignee: Shenzhen Dti Technology Detection Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-08-26
Anticipated expiration: 2041-03-30
Also published as: CN113510738A

Abstract

The invention discloses a mechanical arm of a test device, which comprises: the support is provided with a support, a motor and a side frame, and the support is provided with a long rod; a thread end fixing base is fixedly installed at the bottom of the support or on the ground, a straight arm is rotatably connected to the end of the long rod, the long rod drives the straight arm to move longitudinally, the side frame is limited and guides the long rod to move, a clamping device is installed at the upper end of the straight arm, a clamping jaw and a front jaw are arranged in the clamping device, the starting end of a pull thread is fixed on the thread end fixing base and then penetrates through the straight arm and is connected into the clamping device, the pull thread drives the clamping device to perform clamping action, the motor drives the straight arm to act, and the straight arm acts to drive the pull thread to act; the large sample and the small sample can be conveniently and quickly clamped to carry out process type inspection, the structure is simple, maintenance and assembly are convenient, and use and production cost can be effectively reduced.

Description

Mechanical arm of testing device

Technical Field

The invention relates to the field of test device equipment, in particular to a mechanical arm of a test device.

Background

The conventional sample inspection is to inspect the surface or the inside of a sample by a sensor while or after using a mechanical clamp.

The existing mechanical clamping arm is generally driven by one air cylinder, the telescopic rod is driven by the other air rod, in the process of repeating the working procedure, the two air cylinders are required to act once each time the inspection action is carried out, and the wear rates of the two air cylinders are almost the same under long-term work, so that the two air cylinders or parts of the two air cylinders are generally replaced at the same time during maintenance. And the clamping action and the clamping lifting action are not carried out simultaneously, so that the inspection efficiency is not high, and the two actions driven by the air cylinder are carried out simultaneously, so that the force applied to the sample during clamping is too large, and the sample is damaged. The surface of part of samples can be sprayed with liquid in the production process, the clamping jaw easily causes the deviation of a clamping position when in clamping transfer, the existing clamping jaw generally does not have a secondary strengthening clamping function, part of structures are too complex, and the equipment cost is too expensive.

Accordingly, there is a need for a robotic arm for a testing device that addresses one or more of the above problems.

Disclosure of Invention

In order to solve one or more problems in the prior art, the invention provides a mechanical arm of a test device. The technical scheme adopted by the invention for solving the problems is as follows: a robotic arm for a testing device, comprising: the support is fixedly arranged on the support;

the long rod is divided into a long section and a short section, is arranged on the support and rotates by taking the support as a fulcrum;

the front end of the front rotating connecting piece is rotatably arranged at the end part of the short section;

the motor support is arranged on the support, a motor is arranged on the motor support, a rotating wheel is fixedly arranged on a rotor shaft of the motor, at least two clamping teeth are arranged on the rotating wheel, and the clamping teeth are matched with the outer end part of the long section;

the wire end fixing base is fixedly arranged on the ground or at the bottom of the support and used for fixing the wire end of the stay wire;

the side frame is fixedly arranged on the bracket, a guide piece is fixedly arranged on the side frame, and a matching bulge is arranged on the guide piece;

the side surface of the straight arm is provided with a guide groove matched with the matching bulge, the side surface of the lower end part of the straight arm is provided with a connecting groove, the rear end of the front rotating connecting piece is matched and rotatably connected with the connecting groove, the top of the straight arm is provided with a threading support, a thread hole is formed in the straight arm, and the straight arm is installed on the guide piece and the front rotating connecting piece;

the clamping device is provided with a mounting box, the mounting box is fixedly mounted at the upper end part of the straight arm, a mounting groove is formed in the mounting box, and a sliding groove is formed in the side surface of the mounting box;

the upper end part of the sliding piece is provided with a wire fixing groove, the front side surface of the sliding piece is provided with two chutes which are symmetrically arranged, and the sliding piece is slidably arranged in the mounting groove;

the stopper is fixedly installed at the bottom of the installation groove, the bottom surfaces of two ends of the stopper are respectively provided with a first protrusion and a second protrusion, the outward side surfaces of the first protrusion and the second protrusion are provided with inclined surfaces, the two inclined surfaces are symmetrical and are inverted splayed, and the stopper is used for limiting the slider and preventing the slider from falling off;

the upper end part of each clamping arm is provided with a sliding arm, the sliding arm is slidably mounted in the chute, the end part of the sliding arm is provided with a locking hole, the locking hole is matched with the chute, the locking hole is connected with the chute through a pin, and the two clamping arms are slidably mounted on the chute and symmetrically arranged;

the lower end part of the clamping arm is provided with an adjusting arm, the adjusting arm is provided with an adjusting transverse groove, a clamping jaw is fixedly mounted on the adjusting transverse groove, and the mounting position of the clamping jaw is adjusted through the adjusting transverse groove;

the clamping jaws are internally provided with sliding holes, the bottom side surface of each sliding hole is provided with a side sliding groove, a longitudinal sliding piece is arranged in each sliding hole in a sliding mode, the upper end and the lower end of the inner side surface of each longitudinal sliding piece are respectively provided with an upper inclined surface and a lower inclined surface, the upper inclined surface of the longitudinal sliding piece in one clamping jaw is matched with the inclined surface of the first bulge, the upper inclined surface of the longitudinal sliding piece in the other clamping jaw is matched with the inclined surface of the second bulge, a retaining piece is arranged in each side sliding groove in a sliding mode, the retaining piece is matched with the lower inclined surface in an inclined mode, a spring is arranged in each side sliding groove, the spring is compressed when the retaining piece moves inwards, the lower end portion of the retaining piece is provided with a front claw, and the front claw is bent towards the inner side of the retaining piece;

the stroke limit baffle is fixedly arranged on the bottom surfaces of the sliding hole and the side sliding groove, the stroke limit baffle supports the retaining piece and limits the retaining piece and the longitudinal sliding piece, and the front claw penetrates through the stroke limit baffle;

the starting end part of the pull wire is fixed on the wire head fixing base, and the pull wire penetrates through the wire hole and bypasses the threading support to be fixedly connected into the wire fixing groove.

Furthermore, the latch is circularly and symmetrically arranged in a length-by-length order in a double number manner, the side surface of the latch is an inclined surface or an arc surface, and the length of the latch is smaller than or equal to that of the front connecting piece.

Furthermore, a flange is arranged on the thread end fixing base, a screw is connected with the inner thread of the flange, and a thread fixing hole is formed in the screw;

and a second screw is connected in the thread fixing groove in a threaded manner, a second thread fixing hole is formed in the second screw, and the second thread fixing hole is used for fixing the thread head of the pull thread.

Further, the straight arm is in an inverted L shape, a second wire hole is formed in the front end of the upper end portion of the straight arm, the pull wire penetrates through the second wire hole and enters the wire fixing groove in the slider, the mounting box is fixedly mounted on the bottom face of the front end of the upper end portion of the straight arm, and the mounting groove corresponds to the second wire hole in the vertical direction.

Furthermore, the upper surface of the stopper is provided with a limiting protrusion, the limiting protrusion is used for abutting against the slider, and the sliding stroke of the slider is adjusted by adjusting the height of the limiting protrusion.

Furthermore, the chutes are symmetrically arranged and then are in an inverted splayed shape.

Furthermore, the front side face and the rear side face of the mounting box are provided with the sliding grooves, and two clamping arms are symmetrically mounted in each sliding groove.

Further, the threading support is provided with two.

Further, the adjusting transverse groove is obliquely arranged, and the height of the outward end of the adjusting transverse groove is lower than that of the inward end of the adjusting transverse groove.

The invention has the following beneficial values: according to the invention, the support, the long rod, the front rotating connector, the motor, the thread end fixing base, the straight arm, the clamping device, the slider and other components are connected together through a smart structure, so that the motor is matched with the rotating wheel to carry out process type clamping, the large and small samples are respectively inspected, and the working efficiency of the equipment is higher; through the inclined plane matching among the longitudinal sliding piece, the holding piece, the first bulge and the second bulge, the front claw can perform secondary clamping after the clamping of the clamping arm, so that the clamping looseness or the sliding off of a sample is avoided; through motor drive the stock makes lever motion, will the stock perk, this moment because the length of acting as go-between is unchangeable, the stock up moves will the longitudinal part of acting as go-between lengthens, then its transverse part shortens, both is acting as go-between is pulling the saddle moves toward the upside, the chute drive the arm lock carries out the centre gripping toward inboard motion to the centre gripping action is gone on simultaneously with the action that rises, has realized the quick centre gripping and has held up the sample, and the centre gripping length of arm lock and the rise height of stock are adjustable, and the succinct maintenance of being convenient for of structure simultaneously uses, manufacturing cost also lower. The practical value of the invention is greatly improved.

Drawings

FIG. 1 is a perspective view of a robotic arm of a testing device of the present invention;

FIG. 2 is a perspective view of a straight arm of a robotic arm of a testing apparatus of the present invention;

FIG. 3 is a cross-sectional view of a straight arm of a robotic arm of a testing apparatus of the present invention;

FIG. 4 is a perspective view of the thread end fixing base of the robot arm of the testing apparatus according to the present invention;

FIG. 5 is a perspective view of a side frame of a robotic arm of a testing apparatus of the present invention;

FIG. 6 is a perspective view of a clamping device of a robotic arm of a testing apparatus of the present invention;

FIG. 7 is an exploded view of a clamping device of a robotic arm of a testing apparatus of the present invention;

fig. 8 is a cross-sectional view of a holding device of a robot arm of a test apparatus according to the present invention.

[ reference numerals ]

101. bracket

110. stay wire

201. support

301. long rod

302. long section

303. short section

310. front connector

330. motor support

331. motor

332. rotating wheel

333 DEG C

401. wire end fixing base

402. flange

403. screw

404. hole for fixing wire

501. side frame

510. guide

511. the matching projection

601. straight arm

602. guide groove

603. connecting groove

604. threading support

605. line hole

606. second wire hole

701. clamping device

710. mounting box

711 mounting groove

712 sliding chute

713. stopper

714. first projection

715. second projection

716. limiting projection

720 slider

721. fixed wire groove

722. second screw

723. second wire fixing hole

724. chute

730. clamping arm

731. slide arm

732. locking hole

733. regulating arm

734. regulating transverse groove

801. clamping jaw

802. sliding hole

803 DEG towards the plane of the side-sliding groove

810. longitudinal slide

811. upper inclined plane

812. lower inclined plane

820. holder

821. front claw

822. the matching inclined plane

830. spring

840. travel limit stop.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many different forms than those described herein and those skilled in the art will recognize that many changes may be made thereto without departing from the spirit and scope of the present invention, which is therefore not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 8, the present invention discloses a robot arm of a testing apparatus, which includes: the support 101 is characterized in that a support 201 is fixedly arranged on the support 101;

the long rod 301 is divided into a long section 302 and a short section 303, and the long rod 301 is mounted on the support 201 and rotates by taking the support 201 as a fulcrum;

the front end of the front connecting piece 310 is rotatably arranged at the end part of the short section 303;

the motor support 330 is mounted on the support 101, a motor 331 is mounted on the motor support 330, a rotating wheel 332 is fixedly mounted on a rotor shaft of the motor 331, at least two latch 333 are arranged on the rotating wheel 332, and the latch 333 is matched with the outer end part of the long section 302;

the wire end fixing base 401 is fixedly arranged on the ground or at the bottom of the support 101, and the wire end fixing base 401 is used for fixing a wire end of a pull wire;

the side frame 501 is fixedly arranged on the bracket 101, a guide piece 510 is fixedly arranged on the side frame 501, and a matching protrusion 511 is arranged on the guide piece 510;

a straight arm 601, a guide groove 602 matched with the matching protrusion 511 is arranged on the side surface of the straight arm 601, a connecting groove 603 is arranged on the side surface of the lower end part of the straight arm 601, the rear end of the front connecting piece 311 is matched and rotatably connected with the connecting groove 603, a threading support 604 is arranged on the top of the straight arm 601, a thread hole 605 is arranged in the straight arm 601, and the straight arm 601 is installed on the guide piece 510 and the front connecting piece 311;

the clamping device 701 is provided with a mounting box 710, the mounting box 710 is fixedly mounted at the upper end part of the straight arm 601, a mounting groove 711 is arranged in the mounting box 710, and a sliding groove 712 is arranged on the side surface of the mounting box 710;

a slider 720, wherein a wire fixing slot 721 is arranged at the upper end of the slider 720, two chutes 724 are symmetrically arranged on the front side surface of the slider 720, the chutes 724 may penetrate through the chutes, and the slider 720 is slidably mounted in the mounting groove 711;

the stopper 713 is fixedly installed at the bottom of the installation groove 711, the bottom surfaces of two ends of the stopper 713 are respectively provided with a first protrusion 714 and a second protrusion 715, the outward side surfaces of the first protrusion 714 and the second protrusion 715 are provided with inclined surfaces, the two inclined surfaces are symmetrical and are inverted-splayed, and the stopper 713 is used for limiting the slider 720 to prevent the slider 720 from falling off;

the upper end of each clamping arm 730 is provided with a sliding arm 731, the sliding arm 731 is slidably mounted in the sliding groove 712, the end of the sliding arm 731 is provided with a locking hole 732, the locking hole 732 is matched with the inclined groove 724, the locking hole 732 is connected with the inclined groove 724 through a pin, and the two clamping arms 730 are slidably mounted on the sliding groove 712 and are symmetrically arranged;

an adjusting arm 733 is arranged at the lower end part of the clamping arm 730, an adjusting transverse groove 734 is arranged on the adjusting arm 733, a clamping jaw 801 is fixedly installed on the adjusting transverse groove 734, and the installation position of the clamping jaw 801 is adjusted through the adjusting transverse groove 734;

a sliding hole 802 is arranged in the clamping jaw 801, a side sliding groove 803 is arranged on the side surface of the bottom of the sliding hole 802, a longitudinal sliding piece 810 is slidably installed in the sliding hole 802, an upper inclined surface 811 and a lower inclined surface 812 are respectively arranged at the upper end and the lower end of the inner side surface of the longitudinal sliding piece 810, the upper inclined surface 811 of the longitudinal sliding piece 810 in one clamping jaw 801 is matched with the inclined surface of the first protrusion 714, the upper inclined surface 811 of the longitudinal sliding piece 810 in the other clamping jaw 801 is matched with the inclined surface of the second protrusion 715, a retaining member 820 is slidably mounted in the side sliding groove 803, the retaining member 820 is in inclined plane fit with the lower inclined plane 812, a spring 830 is installed in the side sliding groove 803, the spring 830 is compressed when the holder 820 moves inward, a front claw 821 is provided at the lower end of the holder 820, and the front claw 821 is bent inward of the holder 820;

a travel limit baffle 840, the travel limit baffle 840 being fixedly mounted on the bottom surfaces of the sliding hole 802 and the side sliding groove 803, the travel limit baffle 840 supporting the holder 820 and limiting the holder 820 and the longitudinal slide 810, the front claw 821 passing through the travel limit baffle 840;

a pull wire 110, the initial end of the pull wire 110 is fixed on the thread end fixing base 401, the pull wire 110 passes through the thread hole 605 and bypasses the threading bracket 604 to be fixedly connected into the thread fixing groove 721.

It should be noted that, during the cylinder driving, the cylinder is required to complete two actions of pushing and pulling by one-time clamping checking and releasing, and the motor is required to rotate by a certain angle during the motor driving, and the requirement on the real-time rotating angle of the motor is low by fixing the angle by the latch 333, and the motor is required to be timed to zero and run at the uniform speed, so that the operation is more convenient during the process type operation on the long production line.

As shown in fig. 1, when the present invention is used, the motor 331 drives the long rod 301 to perform a lever motion through the rotating wheel 332, so as to tilt the straight arm 601, the straight arm 601 vertically moves upwards under the action of the side frame 501, after the straight arm 601 tilts, because the total length of the pull wire 110 is unchanged, the longitudinal portion of the pull wire 110 is lengthened, the transverse portion is inevitably shortened, so that the pull wire 110 will pull the slider 720 to move upwards, when the slider 720 moves upwards, under the action of the chute 724 and the chute 712, the two symmetrically arranged clamp arms 730 perform a horizontal translational motion (when the chute 712 is horizontally arranged), so as to clamp a sample, the clamping action and the lifting action are very fast and generally simultaneous, so as to quickly clamp and lift the sample, perform other actions to be tested or NG, OK operations, after the clamping is released, the sliding piece 720 pulls the pulling wire 110 to be reset together under the action of gravity. Generally, the pull wire 110 has a certain elasticity.

As shown in fig. 8, when the clamping arm 730 performs a clamping action, the first protrusion 714 and the second protrusion 715 are in inclined-plane engagement with the longitudinal slider 810, so that the longitudinal slider 810 moves downwards, and then the longitudinal slider 810 is in inclined-plane engagement with the holder 820, so that the holder 820 moves inwards and compresses the spring 830 (the spring 830 performs a reset function), and at this time, the front claw 821 on the holder 820 moves inwards to perform a secondary clamping on the sample, so as to prevent the sample from sliding off. The holder 820 is provided with a mating slope 822 which mates with the lower slope 812. The lengths and positions of the first protrusion 714 and the second protrusion 715 are set according to requirements, such as: when a small sample which does not need to be secondarily clamped is clamped, the clamping jaw 801 completely passes through the first protrusion 714 and the second protrusion 715 before the small sample is clamped, so that the front jaw 801 is reset, secondary clamping is not carried out, the design does not affect the subsequent clamping of a large sample, the position of the clamping arm does not need to be readjusted, and samples with various sizes can be placed on the conveyor belt simultaneously.

It should be noted that the front rotating connector 310 is arranged to facilitate the rotational connection between the two components, and the lifting height of the straight arm 601 can be adjusted by replacing the connectors with different lengths, and the longer the front rotating connector 310 is, the longer the liftable distance of the straight arm 601 is, and the guide groove 602 can also limit the stroke of the straight arm 601.

Specifically, the latch 333 is circularly and doubly and symmetrically arranged in a long-short sequence, the latch 333 clamps large samples in a short time, and the latch 333 clamps small samples in a long time, so that the process type clamping inspection can be conveniently carried out, and the large samples and the small samples on the production line are clamped in turn; the side surfaces of the latch 333 are inclined surfaces or arc surfaces, generally, the two latches 333 can be connected through the arc surfaces, and the arc surfaces are in an inward concave shape, so that sudden change from clamping to loosening action to damage the clamping device 701 is avoided, and switching from the latch to the latch is smooth. The latches 333 are generally disposed on the wheel 332 in a circumferential array.

It should be noted that the length of the latch 333 is less than or equal to the length of the front hinge 310, so as to avoid the occurrence of the seizing phenomenon caused by over-clamping or insufficient lubrication of the front hinge 310 during use.

Specifically, as shown in fig. 4 and 7, a flange 402 is provided on the string head fixing base 401, a screw 403 is connected to the flange 402 through an internal thread, and a string hole 404 is provided on the screw 403;

a second screw 722 is connected to the thread fixing groove 721 through a female thread, a second thread fixing hole 723 is formed in the second screw 722, and the second thread fixing hole 723 is used for fixing a thread end of the pull thread 110.

Specifically, as shown in fig. 2 and 3, the straight arm 601 is inverted L-shaped, a second wire hole 606 is formed in a front end of an upper end portion of the straight arm 601, the pull wire 110 enters the wire fixing groove 721 of the slider 720 through the second wire hole 606, the mounting box 710 is fixedly mounted on a bottom surface of the front end of the upper end portion of the straight arm 601, and a spatial position of the mounting groove 711 corresponds to a spatial position of the second wire hole 606. Generally, there are two threading brackets 604. The threading bracket 604 functions to facilitate adjustment of the position of the wire 110 and to withstand the downward pressure of the wire 110.

Specifically, as shown in fig. 8, the stopper 713 is provided at an upper surface thereof with a limit protrusion 716, the limit protrusion 716 is used to abut against the slider 720, and the sliding stroke of the slider 720 is adjusted by adjusting the height of the limit protrusion 716. Generally, the inclined slots 724 are symmetrically arranged and then have an inverted-splayed shape, so that the two clamping arms 730 are spread apart when the slider 720 is at the bottom of the mounting groove 711, and the two clamping arms 730 are pulled close to clamp when the slider 720 moves upwards. Generally, the clamping arms 730 are plastic members, the slider 720 is a metal member, and a weight is optionally disposed in the slider 720 to facilitate gravity return.

Specifically, as shown in fig. 6 to 8, an adjusting arm 733 is disposed at a lower end of the clamping arm 730, an adjusting transverse slot 734 is disposed on the adjusting arm 733, a clamping jaw 801 is fixedly mounted on the adjusting transverse slot 734, and the mounting position of the clamping jaw 801 is adjusted through the adjusting transverse slot 734. Generally, the front and rear sides of the mounting box 710 are provided with the sliding grooves 712, and two clamping arms 730 are symmetrically mounted in each sliding groove 712, i.e. a total of 4 clamping arms 730 are provided, and two clamping arms are a group, so that the clamping is more stable. When the adjusting cross slot 734 is obliquely arranged, the height of the outward end of the adjusting cross slot 734 is lower than that of the inward end thereof, so as to finely adjust the height position of the clamping jaw 801.

In conclusion, the support, the long rod, the front rotating connector, the motor, the thread end fixing base, the straight arm, the clamping device, the slider and other components are connected together through a smart structure, so that the motor is matched with the rotating wheel to perform process type clamping, large and small samples are respectively inspected, and the working efficiency of the equipment is higher; through the inclined plane matching among the longitudinal sliding piece, the holding piece, the first bulge and the second bulge, the front claw can perform secondary clamping after the clamping of the clamping arm, so that the clamping looseness or the sliding off of a sample is avoided; through motor drive the stock makes lever motion, will the stock perk, this moment because the length of acting as go-between is unchangeable, the stock up moves will the longitudinal part of acting as go-between lengthens, then its transverse part shortens, both is acting as go-between is pulling the saddle moves toward the upside, the chute drive the arm lock carries out the centre gripping toward inboard motion to the centre gripping action is gone on simultaneously with the action that rises, has realized the quick centre gripping and has held up the sample, and the centre gripping length of arm lock and the rise height of stock are adjustable, and the succinct maintenance of being convenient for of structure simultaneously uses, manufacturing cost also lower. The practical value of the invention is greatly improved.

The above-described examples merely represent one or more embodiments of the present invention, which are described in greater detail and detail, but are not to be construed as limiting the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the spirit of the invention, which falls within the scope of the invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A robotic arm for a testing device, comprising: the support is fixedly arranged on the support;

and the initial end part of the pull wire is fixed on the wire head fixing base, and the pull wire penetrates through the wire hole and bypasses the threading support to be fixedly connected into the wire fixing groove.

2. The mechanical arm of the test device as claimed in claim 1, wherein the latch is circularly and symmetrically arranged in a length-length order in an even number manner, the side surface of the latch is an inclined surface or an arc surface, and the length of the latch is less than or equal to that of the front rotating connecting piece.

3. The mechanical arm of the test device as claimed in claim 1, wherein a flange is arranged on the thread end fixing base, a screw is connected to the flange in a threaded manner, and a thread fixing hole is formed in the screw;

4. The mechanical arm of the testing device as claimed in claim 1, wherein the straight arm is in an inverted L shape, a second wire hole is formed in a front end of an upper end portion of the straight arm, the pull wire penetrates through the second wire hole and enters the wire fixing groove in the slider, the mounting box is fixedly mounted on a bottom surface of the front end of the upper end portion of the straight arm, and spatial positions of the mounting groove and the second wire hole correspond up and down.

5. The mechanical arm of the test device as claimed in claim 1, wherein the stopper is provided with a limiting protrusion on an upper surface thereof, the limiting protrusion is used for abutting against the slider, and the sliding stroke of the slider is adjusted by adjusting the height of the limiting protrusion.

6. The robotic arm of a testing device as claimed in claim 1, wherein the chutes are symmetrically arranged and have an inverted splay shape.

7. The mechanical arm of the test device as claimed in claim 1, wherein the sliding grooves are formed in the front side surface and the rear side surface of the mounting box, and two clamping arms are symmetrically mounted in each sliding groove.

8. The robotic arm of a testing device according to claim 1, wherein there are two threading brackets.

9. The mechanical arm for the test device as claimed in claim 1, wherein the adjusting transverse slot is disposed obliquely, and the height of the outward end of the adjusting transverse slot is lower than that of the inward end of the adjusting transverse slot.