CN210803094U - Universal testing machine with protective cover - Google Patents

Abstract

The utility model relates to a universal tester with protection cover, including testing machine body and protection cover, the protection cover surrounds the testing machine body and sets up, and the protection cover includes guard gate, roof and two pairs of guard plates of interconnect, and the guard gate is articulated with the guard plate, is provided with the retaining member between one end of guard gate keeping away from the pin joint and another guard plate, and the guard gate passes through the retaining member to be connected with the guard plate; a starting device is arranged between one side of the protective door far away from the hinge point and the protective plate; buffer units are installed on the protective door and the protective plate. By adopting the technical scheme, the protective cover can reduce dust entering the testing machine body and reduce the service life of the testing machine body; the locking piece and the starting device are convenient for fixing the protective door, the testing machine can be started and stopped to work, and when the protective door is opened, the testing machine body is convenient to pause to work, so that the safety of operation and use is improved; the buffer device is convenient for reducing the condition that the test material directly impacts the protective cover.

Description

Universal testing machine with protective cover

Technical Field

The utility model belongs to the technical field of the check out test set technique and specifically relates to a universal tester with protection casing is related to.

Background

The universal tester is mainly used for tests of metal materials, cement, concrete and other materials such as tensile, compression, bending, shearing and the like, is widely applied to industries such as machinery, metallurgy, traffic, construction, building materials, quality detection and the like, and is mainly applied to a destructive test method when a material test is carried out, so that the material is subjected to tensile fracture, bending fracture or extrusion crushing to detect the limit performance of the tested material. In the detection process, the broken materials usually splash or are thrown away, so that potential safety hazards are brought to testers and laboratories. Therefore, a protective cover is often installed outside the universal testing machine to prevent the tested material from popping up, and the safety factor of the testing machine body is improved.

At present, the protection casing of testing machine body is made by metal material or glass material usually, and the safety cover of testing machine body divide into sealed safety cover and separates the net formula protection casing, and the protection casing that separates the net formula can make more dust get into the testing machine body in pollute the testing machine body, simultaneously, places when a long time at the testing machine body, the screw rod and the motor of testing machine body can be covered with the dust for screw rod pivoted smooth and easy degree descends, thereby lead to the life reduction of testing machine body. In addition, during the material testing process, there is a risk that the material flies out of the tester body and hits the protective cover, so that the protective cover is damaged. Therefore, there is room for improvement.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an universal tester with protection casing has dustproof and the direct advantage that strikes the protection casing of reduction material.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a universal testing machine with a protective cover comprises a testing machine body and the protective cover arranged outside the testing machine body, wherein the protective cover surrounds the testing machine body, the protective cover comprises a protective door, a top plate and a plurality of protective plates, every two protective plates are connected with each other, the top plate is fixedly connected with the top surfaces of the protective plates which are connected with each other, one end of the protective door is hinged with the protective plates, a locking piece is arranged between one end of the protective door, which is far away from the hinged joint of the protective door and the protective plates, and the other protective plate, and the protective door is connected with the protective plates through the locking piece; a starting device for starting and stopping the testing machine body is arranged between one side of the protective door, which is far away from a hinge point between the protective door and the protective plate, and the protective plate; the protection door with the guard plate is close to the separation is all installed to one side of testing machine body the experimental material striking that testing machine body fled out the buffer of protection casing.

By adopting the technical scheme, the protection plate, the protection door and the top plate are all closed flat plates and are connected with each other to form the protection cover, and the protection cover surrounds the testing machine body, so that dust can be reduced from entering the testing machine body, the screw transmission motion of the testing machine body is smoother, and the service life of the testing machine body is prolonged; the protective door is hinged with the protective plate through the hinge, so that the safety of operators is improved by conveniently closing the protective door, and meanwhile, the protective door is conveniently opened to take out test materials, so that the operation is simple and convenient; the locking piece is used for closing and fixing the protective door, so that the situation that the experimental material flies out of the protective cover to hurt an operator due to the fact that the protective door is not closed is reduced, and the safety of the operator in the process of operating the testing machine body is improved; meanwhile, a starting device is arranged between the protective door and the protective plate, and when the protective door is closed and fixed, the starting device starts the testing machine body so as to facilitate the next operation; meanwhile, when the protective door is opened, the starting device suspends the operation of the testing machine body so as to reduce the situation that the test material flies out of the protective cover to hurt the human body, and therefore, the starting device is beneficial to improving the safety of an operator for operating the testing machine body; buffer is mainly at the side-mounting cloth curtain that guard gate and guard plate are close to the testing machine body, and the cloth curtain is made for the cloth material, and has the distance between cloth curtain and guard plate or the guard gate, is favorable to alleviating the impact force that test material strikes the protection casing to improve the life of protection casing. Therefore, the protective cover is arranged, so that dust is prevented from entering the testing machine body, and the service life of the testing machine body is shortened; by arranging the locking piece and the starting device, the testing machine body is started to work while the protective door is fixed, and the testing machine body is conveniently suspended to work when the protective door is opened, so that the safety of operation and use is improved; through setting up buffer, conveniently reduce the condition that test material directly strikeed the protection casing to improve the life of protection casing.

The utility model discloses further set up to: buffer include with the guard gate or guard plate fixed connection's base and winding have the pivot of cloth curtain, the pivot with the base rotates to be connected, clockwork spring has been cup jointed respectively at the both ends of pivot, clockwork spring is close to the one end of pivot with pivot fixed connection, clockwork spring with the base is pegged graft, clockwork spring keeps away from the one end of pivot with base fixed connection, the cloth curtain is kept away from the one end of pivot with the guard gate or guard plate sliding connection, the cloth curtain is kept away from the one end of pivot with the guard gate or be provided with fixedly between the guard plate the fixing device of cloth curtain.

By adopting the technical scheme, the cloth curtain and the rotating shaft rotate, the cloth curtain is unfolded by pulling one end of the cloth curtain far away from the rotating shaft, and the cloth curtain shields the protective door or the protective plate so as to reduce the condition that the test material directly impacts the protective cover; the clockwork spring has a reset function, can deform when pulling the cloth curtain, fixes the cloth curtain through the fixing device, and can reset when the cloth curtain is recovered in the direction close to the rotating shaft, so that the condition of automatically recovering the cloth curtain is achieved; the fixing device is arranged at one end, far away from the rotating shaft, of the cloth curtain, so that when the cloth curtain is pulled out, one end, far away from the rotating shaft, of the cloth curtain is fixed by the fixing device, the whole cloth curtain is fixed, and therefore the fixing operation of the cloth curtain is simple and convenient.

The utility model discloses further set up to: the fixing device comprises a fixing rod, the fixing rod is far away from the cloth curtain, one end of the rotating shaft is fixedly connected with the fixing block, two ends of the fixing rod are fixedly connected with fixing blocks, the fixing block is connected with the protective door or the protective plate in a sliding mode, a torsional spring is arranged between the fixing block and the protective door or between the protective plates, one end of the torsional spring is fixedly connected with the fixing block, the other end of the torsional spring is fixedly connected with a friction block, and the friction block is connected with the protective door or between the protective plates in a abutting mode.

By adopting the technical scheme, the fixed rod is arranged, so that the bending condition of one end of the cloth curtain far away from the rotating shaft is reduced, and meanwhile, the fixed block is clamped and slides with the protective door or the protective plate by arranging the fixed block, so that the distance between the fixed block and the protective door or the protective plate is limited; the fixed block is opened flutedly towards the side of guard plate or guard gate, and the inside wall fixedly connected with bull stick of recess, the bull stick is pegged graft and is had the torsional spring, the one end and the fixed block fixed connection of torsional spring, the clutch blocks of the other end of torsional spring are under the effect of the torsional force of torsional spring for the clutch blocks supports tightly with guard gate or guard plate, thereby fixed block, with the condition that reduces the cloth curtain and retrieve.

The utility model discloses further set up to: the starting device comprises a inching switch fixedly connected with the protection plate and a hollow fixed seat, the fixed seat is fixedly connected with the protection plate, a push rod is inserted into the side face of the fixed seat, two ends of the push rod protrude out of the side face of the fixed seat, the push rod is communicated with a cavity of the fixed seat, a sliding block is fixedly connected to the middle of the push rod, the sliding block slides in the cavity of the fixed seat, a compression spring is inserted into the push rod, one end of the compression spring is fixedly connected with the sliding block, and the other end of the compression spring is fixedly connected with the inner side wall, far away from the sliding block, in the cavity of the fixed seat; one end of the push rod, which is far away from the inching switch, is fixedly connected with a butting block, and the side surface of the protective door is fixedly connected with an extrusion block which extrudes the butting block; when the extrusion block extrudees the butt joint piece, the push rod extrusion triggers inching switch opens the testing machine body.

By adopting the technical scheme, the inching switch is in a normally open state, the testing machine body is started when the inching switch is closed, and the testing machine body is paused when the inching switch is opened; fixing base and guard plate fixed connection, the cavity of fixing base is the cylinder, and the axis direction of the cavity of fixing base sets up towards the trigger position of inching switch, and compression spring's axis direction is unanimous with the axis direction of the cavity of fixing base, and compression spring is located one side that the slider is close to the inching switch, and compression spring is under the self-state, has the distance between push rod and the inching switch. When the protective door is closed, the extrusion block extrudes the abutting block, and pushes the push rod to move to a position close to the inching switch, and the trigger point of the inching switch is triggered by one end of the push rod close to the inching switch so as to trigger the inching switch to work. When the protective door is opened, the compression spring automatically resets, the sliding block is pushed to move to the position far away from the inching switch by the aid of elasticity of the compression spring, the push rod is driven to move to the position far away from the inching switch, the state that the inching switch is triggered by the push rod is relieved, the effect of suspending the working of the testing machine body is achieved, and accordingly the operation of starting and suspending the working of the testing machine body is simple and convenient.

The utility model discloses further set up to: the protection door is close to the side fixedly connected with magnet of guard plate, the side fixedly connected with of protection door supplies magnet attracts fixed metal block each other.

Through adopting above-mentioned technical scheme, utilize magnet appeal for magnet and metal block attract each other fixedly, finally reach the effect of fixed guard gate, make the easy and simple to handle of fixed guard gate.

The utility model discloses further set up to: the protective door with the guard plate is close to open the side of testing machine body has the spout, the cross section of spout is type "T" type, the length direction of spout with the mutual parallel arrangement of the slip direction of fixed block, the side fixedly connected with lug of fixed block, the cross section of lug is type "T" type, the lug with the spout joint slides, the spout is right the lug carries out circumference spacingly.

Through adopting above-mentioned technical scheme, the lug through setting up the fixed block slides with the spout joint, is favorable to improving the direction gliding guidance quality of dead lever along the direction sliding motion of keeping away from or being close to the pivot for the sliding motion of fixed block is more smooth and easy, is favorable to reducing the condition of fixed block and guard gate or guard plate separation simultaneously.

The utility model discloses further set up to: the twisting force of the clockwork spring is greater than the sum of the twisting force of the torsion spring and the friction force of the friction block and the protective door or the protective plate.

By adopting the technical scheme, the torsion force of the clockwork spring is greater than the sum of the torsion force of the torsion spring and the friction force of the friction block and the protective door or the protective plate, so that the resetting caused by the overlarge torsion force of the clockwork spring is favorably reduced, the fixed rod of the cloth curtain moves upwards, and the probability that the test material impacts the protective cover is increased; therefore, through the arrangement, the probability that the test material impacts the protective cover is favorably reduced, and the service life of the protective cover is prolonged.

The utility model discloses further set up to: the middle part of the fixed rod is fixedly connected with a handle.

Through adopting above-mentioned technical scheme, make the dead lever upward movement of door curtain retrieve the door curtain or the door curtain that expandes of downward movement through setting up the handle in order to make things convenient for the operator pulling handle, and then make the easy and simple to handle of retrieving or expandeing the door curtain.

The utility model discloses further set up to: including supplying the work platform that the testing machine body supported, the lower terminal surface of work platform is installed and is removed the wheel.

Through adopting above-mentioned technical scheme, remove the wheel through the setting to make things convenient for the operator to remove the testing machine body to the assigned position, make the removal of testing machine body easy and simple to handle.

To sum up, the utility model discloses following beneficial effect has:

1. the protective cover is arranged, so that dust is prevented from entering the testing machine body, and the service life of the testing machine body is shortened; the locking piece and the starting device are convenient for fixing the protective door and starting the testing machine body to work, and meanwhile, when the protective door is opened, the testing machine body is convenient to pause to work, so that the safety of operation is improved; the buffer device is convenient for preventing the test material from flying out, thereby reducing the condition that the test material directly impacts the protective cover and prolonging the service life of the protective cover;

2. by arranging the clockwork spring, the cloth curtain can be unfolded and automatically reset and rolled; through the arrangement of the fixing device, the friction block is fixedly installed by utilizing the torsion spring, so that the friction block can be always tightly abutted against the protective door or the protective plate, and the effect of fixing the cloth curtain is achieved;

3. by arranging the starting device, the inching switch is turned off and the testing machine is suspended while the protective door is opened by utilizing the reset action of the spring, so that the operation safety is improved; meanwhile, when the protective door is closed, the inching switch is extruded and closed through the towing rod to start the testing machine, so that the testing machine is easy and convenient to start and pause.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a sectional view of the present embodiment;

FIG. 3 is a cross-sectional view of another angle of the present embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 3 at C;

FIG. 5 is an enlarged view of a portion of FIG. 2 at A;

FIG. 6 is an enlarged view of a portion of FIG. 2 at B;

FIG. 7 is a schematic view of a fixing device according to the present embodiment;

fig. 8 is a schematic view of the state in which the protection door of the present embodiment is closed.

Reference numerals: 1. a testing machine body; 2. a protective cover; 21. a protection plate; 22. a protective door; 23. a top plate; 24. a working platform; 241. a moving wheel; 25. a chute; 3. a buffer device; 31. blocking eaves; 311. a base; 312. sinking a groove; 33. a rotating shaft; 34. cloth curtain; 35. a clockwork spring; 36. fixing the rod; 361. a handle; 4. a fixing device; 41. a fixed block; 411. a groove; 412. a rotating rod; 413. a bump; 42. a torsion spring; 43. a friction block; 5. a locking member; 51. a magnet; 52. a metal block; 6. starting the device; 61. a jog switch; 62. a fixed seat; 621. a cavity; 63. a push rod; 64. a slider; 65. a compression spring; 66. a butting block; 67. and extruding the block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 2, a universal testing machine with protection casing, install work platform 24 that removes wheel 241 and place the testing machine body 1 at work platform 24 up end including lower terminal surface, testing machine body 1 installs outward and is fixed in protection casing 2 of work platform 24 up end, protection casing 2 includes guard gate 22, roof 23 and three guard plate 21, guard gate 22 and guard plate 21 are the cuboid, roof 23 is the square, two liang of mutual fixed connection of three guard plate 21, and two adjacent guard plate 21 mutually perpendicular set up, roof 23 all with the up end fixed connection of three mutual guard plate 21, guard gate 22's one end is passed through the hinge and is articulated with guard plate 21, guard gate 22 keeps away from between guard gate 22 and the guard plate 21 one end of pin joint and another adjacent guard plate 21 between install retaining member 5.

The retaining member 5 is magnet 51 and metal block 52, magnet 51 is fixed with guard gate 22 towards the side grafting of guard plate 21, metal block 52 is pegged graft and is fixed in the side of guard plate 21 with the relative setting of pin joint, when closing guard gate 22, magnet 51 sets up with metal block 52 relatively, when making guard gate 22 rotate along the pin joint to laminating with adjacent guard plate 21, it is fixed to attract each other through magnet 51 and metal block 52, and then fixed guard gate 22, make guard gate 22's fixed operation simple and convenient.

As shown in fig. 3 to 4, the shield plates 21 opposite to the hinge point between the shield door 22 and the shield plate 21 are installed with the actuating device 6 between the shield doors 22. Starting drive 6 includes and moves switch 61 and hollow fixing base 62 near the side fixed connection of testing machine body 1 with guard plate 21, fixing base 62 is the cuboid, fixing base 62's cavity 621 is the cylinder, fixing base 62's cavity 621 is on a parallel with ground setting, fixing base 62 has inserted push rod 63 towards the side of guard gate 22, push rod 63's both ends all bulge in fixing base 62's side setting, the middle part fixedly connected with slider 64 of push rod 63, slider 64 is the cylinder, slider 64 slides in fixing base 62's cavity 621.

The push rod 63 is inserted with the compression spring 65, one end of the compression spring 65 is fixedly connected with the inner side wall of the cavity 621 of the fixing seat 62 close to the inching switch 61, the other end of the compression spring 65 is fixedly connected with the sliding block 64, and when the compression spring 65 is in a natural state, one end of the push rod 63, far away from the abutting block 66, is separated from the inching switch 61.

One end of the push rod 63, which is far away from the jog switch 61, is fixedly connected with a butting block 66, the butting block 66 is a cylinder, and the axial direction of the butting block 66 is consistent with the axial direction of the push rod 63. The side fixedly connected with extrusion piece 67 of butt piece 66 that guard plate 21 is close to guard gate 22, and extrusion piece 67 protrusion sets up in the side of guard gate 22, and when extrusion piece 67 extruded butt piece 66, push rod 63 extruded and triggered inching switch 61 in order to open testing machine body 1.

The magnet 51 and the metal block 52 attract each other and fix the protective door 22, and meanwhile, the extrusion block 67 extrudes the abutting block 66 to further drive the push rod 63 to move to a position close to the trigger switch, so that the inching switch 61 is extruded and triggered to start the testing machine body 1, and the situation that test materials fly out of an opening between the protective door 22 and the protective plate 21 due to forgetting to close the protective door 22 in operation is reduced; when the protective door 22 is opened, the state that the magnet 51 and the metal block 52 are attracted to each other is released, meanwhile, the compression spring 65 of the starting device 6 is reset, the sliding block 64 is pushed to move to a position away from the inching switch 61, and then the state that the push rod 63 extrudes and triggers the inching switch 61 is released, so that the safety of the testing machine body 1 in the using process is improved.

As shown in fig. 2 and 5, the side of protective door 22 and protective plate 21 close to testing machine body 1 is all installed with buffer 3 that the test material of separation testing machine body 1 directly strikes protection casing 2 after flying out, buffer 3 includes the fender eaves 31 that is close to testing machine body 1 with protective door 22 or protective plate 21, it is the cuboid to keep off eaves 31, protective door 22 or protective plate 21 are close to two bases 311 of side fixedly connected with of testing machine body 1, base 311 is located and keeps off eaves 31 along the below that keeps off eaves 31 length direction's both ends, the up end of base 311 and the lower terminal surface coplane setting that keeps off eaves 31.

The opposite side surfaces of the two bases 311 are provided with sunk grooves 312, the bases 311 are rotatably connected with a rotating shaft 33, the rotating shaft 33 is positioned between the two bases 311, the rotating shaft 33 is inserted into the sunk grooves 312, the two ends of the rotating shaft 33 are all spliced with the clockwork spring 35, the clockwork spring 35 is positioned in the sunk grooves 312, one end of the clockwork spring 35 close to the rotating shaft 33 is fixedly connected with the rotating shaft 33, the other end of the clockwork spring 35 is fixedly connected with the inner side wall of the sunk grooves 312, and the rotating directions of the clockwork spring 35 at the two ends of the.

As shown in fig. 6 and 7, a cloth curtain 34 is wound around the outer peripheral surface of the rotating shaft 33, one end of the cloth curtain 34 close to the rotating shaft 33 is fixedly connected with the rotating shaft 33, the other end of the cloth curtain 34 is fixedly connected with a fixing rod 36 (as shown in fig. 3), a handle 361 (as shown in fig. 3) is fixedly connected to the outer peripheral surface of the fixing rod 36, the handle 361 is located at one side close to the testing machine body 1, and two ends of the fixing rod 36 in the axial direction are fixedly connected with fixing devices 4 for fixing the cloth curtain 34.

The fixing device 4 comprises a fixing block 41 fixedly connected with two ends of the fixing rod 36 along the axial direction of the fixing rod 36, a convex block 413 is protruded on the side surface of the fixing block 41 close to the protective door 22 or the protective plate 21, and the cross section of the convex block 413 is similar to a T shape. The side face of the protective door 22 or the protective plate 21 close to the testing machine body 1 is provided with a sliding groove 25, the length direction of the sliding groove 25 is consistent with the height direction of the testing machine body 1, and the cross section of the sliding groove 25 is similar to a T shape. Lug 413 slides with spout 25 joint, and spout 25 carries out circumference spacing to lug 413.

The fixed block 41 is close to the side of guard gate 22 or guard plate 21 and opens flutedly 411, and the inside wall fixedly connected with bull stick 412 of flutedly 411, the axis of bull stick 412 are on a parallel with ground setting, and the bull stick 412 is pegged graft and is had torsional spring 42, the one end and the fixed block 41 fixed connection of torsional spring 42, the other end fixedly connected with clutch blocks 43 of torsional spring 42, and clutch blocks 43 support tightly each other with the tank bottom surface of spout 25. The sum of the torsion force of the torsion spring 42 and the friction force of the friction block 43 with the groove bottom of the slide groove 25 is larger than the torsion force of the clockwork spring 35.

The cloth curtain 34 is pulled to completely cover the side face of the protective door 22 and the side face of the protective plate 21 close to the testing machine body 1, the cloth curtain 34 is pulled to be reset through the torsion spring 42 after reaching a specified position, the friction block 43 and the groove bottom of the sliding groove 25 are mutually abutted tightly, the fixing rod 36 is fixed, the sliding condition of the fixing rod 36 is further reduced, and the pulling and fixing operations of the cloth curtain 34 are simple and convenient.

The working conditions and principles of the embodiment are as follows:

when the test material is detected by using the testing machine body 1, firstly, the protection door 22 is opened to release the state that the magnet 51 and the metal block 52 are mutually attracted and fixed, and simultaneously, the state that the push rod 63 is extruded and the inching switch 61 is triggered to work is released to suspend the testing machine body 1, then the test material is installed on the testing machine body 1, and the pull handle 361 is pulled to enable the cloth curtain 34 to be unfolded to cover the protection door 22 and the protection plate 21, so that the condition that the test material directly impacts the protection cover 2 is reduced (as shown in fig. 8). Then the friction block 43 of the fixing device 4 is abutted against the groove bottom of the sliding groove 25 to fix the cloth curtain 34.

Then, the protective door 22 is closed, so that the push rod 63 extrudes and triggers the inching switch 61 to start the testing machine body 1, an operator controls the testing machine body 1 to work outside the protective cover 2, after the testing machine body 1 finishes working, the protective door 22 is opened to relieve the state that the magnet 51 and the metal block 52 are mutually attracted and fixed, and simultaneously relieve the state that the push rod 63 extrudes and triggers the inching switch 61 to pause the working of the testing machine body 1.

Next, the test material of the tester body 1 was taken out, and test data was recorded. Thereby completing the operation of testing the test material by the tester body 1.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (9)

1. The utility model provides a universal tester with protection casing which characterized in that: the device comprises a testing machine body (1) and a protective cover (2) arranged outside the testing machine body (1), wherein the protective cover (2) surrounds the testing machine body (1), the protective cover (2) comprises a protective door (22), a top plate (23) and a plurality of protective plates (21), the protective plates (21) are connected in pairs, the top plate (23) is fixedly connected with the top surfaces of the protective plates (21) connected in pairs, one end of the protective door (22) is hinged to the protective plate (21), a locking part (5) is arranged between one end, away from a hinge point between the protective door (22) and the protective plate (21), of the protective door (22) and the other protective plate (21), and the protective door (22) is connected with the protective plate (21) through the locking part (5); a starting device (6) for starting and stopping the testing machine body (1) is arranged between one side, away from a hinge point between the protective door (22) and the protective plate (21), of the protective door (22) and the protective plate (21); protection door (22) with guard plate (21) are close to the separation is all installed to one side of testing machine body (1) the experimental material striking that testing machine body (1) flew out buffer (3) of protection casing (2).

2. The universal tester of claim 1, wherein: buffer (3) include with guard gate (22) or base (311) and the winding of guard plate (21) fixed connection have pivot (33) of cloth curtain (34), pivot (33) with base (311) rotate to be connected, clockwork spring (35) have been cup jointed respectively at the both ends of pivot (33), clockwork spring (35) are close to the one end of pivot (33) with pivot (33) fixed connection, clockwork spring (35) with base (311) are pegged graft, clockwork spring (35) are kept away from the one end of pivot (33) with base (311) fixed connection, cloth curtain (34) are kept away from the one end of pivot (33) with guard gate (22) or guard plate (21) sliding connection, cloth curtain (34) are kept away from the one end of pivot (33) with guard gate (22) or be provided with between guard plate (21) and fix fixing device (4) of cloth curtain (34).

3. The universal tester of claim 2, wherein: fixing device (4) include dead lever (36), dead lever (36) with cloth curtain (34) are kept away from the one end fixed connection of pivot (33), the both ends fixedly connected with fixed block (41) of dead lever (36), fixed block (41) with guard gate (22) or guard plate (21) joint slides, fixed block (41) with guard gate (22) or be provided with torsional spring (42) between guard plate (21), the one end of torsional spring (42) with fixed block (41) fixed connection, the other end fixedly connected with clutch blocks (43) of torsional spring (42), clutch blocks (43) with guard gate (22) or guard plate (21) support tightly.

4. The universal tester of claim 1, wherein: the starting device (6) comprises a inching switch (61) fixedly connected with the protection plate (21) and a hollow fixed seat (62), the fixed seat (62) is fixedly connected with the protection plate (21), a push rod (63) is inserted into the side surface of the fixed seat (62), both ends of the push rod (63) are arranged by protruding out of the side surface of the fixed seat (62), the push rod (63) is communicated with the cavity (621) of the fixed seat (62), the middle part of the push rod (63) is fixedly connected with a slide block (64), the slide block (64) slides in the cavity (621) of the fixed seat (62), the push rod (63) is inserted with a compression spring (65), one end of the compression spring (65) is fixedly connected with the slide block (64), the other end of the compression spring (65) is fixedly connected with the inner side wall far away from the sliding block (64) in the cavity (621) of the fixed seat (62); one end, far away from the inching switch (61), of the push rod (63) is fixedly connected with a butting block (66), and the side face of the protective door (22) is fixedly connected with an extrusion block (67) for extruding the butting block (66); when extrusion piece (67) extrusion butt joint piece (66), push rod (63) extrusion triggers inching switch (61) opens testing machine body (1).

5. The universal tester of claim 1, wherein: the side fixedly connected with magnet (51) that guard gate (22) is close to guard plate (21), the side fixedly connected with of guard gate (22) supplies magnet (51) attract fixed metal block (52) each other.

6. The universal tester of claim 3, wherein: guard gate (22) with guard plate (21) are close to open the side of testing machine body (1) has spout (25), the cross section of spout (25) is type "T" type, the length direction of spout (25) with the mutual parallel arrangement of sliding direction of fixed block (41), the side fixedly connected with lug (413) of fixed block (41), the cross section of lug (413) is type "T" type, lug (413) with spout (25) joint slides, spout (25) are right lug (413) carry out circumference spacing.

7. The universal tester of claim 3, wherein: the twisting force of the clockwork spring (35) is greater than the sum of the twisting force of the torsion spring (42) and the friction force of the friction block (43) and the protective door (22) or the protective plate (21).

8. The universal tester of claim 3, wherein: the middle part of the fixed rod (36) is fixedly connected with a handle (361).

9. The universal tester of claim 1, wherein: including supplying work platform (24) that testing machine body (1) supported, the lower terminal surface of work platform (24) is installed and is removed wheel (241).

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