CN214471680U

CN214471680U - Plastic retainer wave-shaped tongue fatigue detection equipment

Info

Publication number: CN214471680U
Application number: CN202022396647.4U
Authority: CN
Inventors: 唐璠; 胡桂涵; 黄良权
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-10-22
Anticipated expiration: 2030-10-23

Abstract

A fatigue detection device for a plastic retainer wave-shaped tongue comprises a base and a pressing mechanism arranged on the base, wherein a clamp is arranged on the base, a mounting groove capable of accommodating the retainer to move along a first direction and limiting the retainer to move along a second direction is formed in the clamp, the first direction is parallel to the force application direction of the pressing mechanism, the second direction is perpendicular to the force application direction of the pressing mechanism, and a limiting structure for limiting the second tail of the wave-shaped tongue to move along the force application direction of the pressing mechanism is arranged in the mounting groove; when fatigue detection is carried out on the stop piece, the stop piece is arranged right below the pressing mechanism, and the pressing mechanism is used for pressing down the stop piece to carry out fatigue test.

Description

Plastic retainer wave-shaped tongue fatigue detection equipment

Technical Field

The utility model relates to a check out test set field especially relates to a plastics retainer wave form tongue fatigue detection equipment.

Background

Miniature circuit breakers are typically mounted by way of rails. In order to avoid the product from sliding freely on the rails, the bottom of the miniature circuit breaker is equipped with plastic stops. The main part of the stopper realizing the stopping function is the corrugated tongue with elasticity, and the fatigue resistance of the corrugated tongue basically determines the service life of the stopper, so that the detection is necessary.

The stop wave tongue has similar performance to the spring, but the structure of the stop is more complicated than that of the spring, so that the spring pressure fatigue test device in chinese patent (CN209230947U) is hardly suitable for plastic stops. In addition, although the stopper is made of a plastic material having a high elasticity, the plastic deformation accounts for a large proportion of the deformation of the plastic member as compared with the metal member spring. Compared with elastic deformation, plastic deformation is complex, influence factors are more, and therefore how to effectively detect fatigue of the stop piece is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a carry out the fatigue detection's of wave form tongue plastics retainer wave form tongue fatigue detection equipment to the retainer.

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

the utility model provides a fatigue check out test set of plastics retainer wave form tongue, includes the base and locates the mechanism that pushes down on the base, be equipped with anchor clamps on the base, set up in the anchor clamps and can hold the mounting groove that the retainer removed and restrict its removal along second direction moving direction along the first direction, first direction be on a parallel with the application of force direction of mechanism that pushes down, the second direction perpendicular to push down the application of force direction of mechanism, be provided with the limit structure that the second afterbody of restriction wave form tongue removed along the application of force direction of mechanism that pushes down in the mounting groove.

Preferably, limit structure including set up the support mesa that supports the second afterbody of wave form tongue in bottom one side of mounting groove, the bottom opposite side of mounting groove is for dodging the first groove of stepping down of the first afterbody of shell.

Preferably, a first notch for enabling the first head of the shell to descend is formed in the side wall of one side of the clamp, a second notch for enabling the wave-shaped tongue to descend is formed in the middle of the first notch, and the first notch and the second notch are communicated with the mounting groove; the lower surface of the first notch and the upper surface of the second notch form a second positioning surface for limiting the compression position of the wave-shaped tongue.

Preferably, be equipped with the guide rail on the base, it is connected with the slider to slide on the guide rail, offers the anchor clamps groove that is used for placing anchor clamps on the slider, anchor clamps are installed in the anchor clamps inslot, and the slider can drive anchor clamps and remove towards the direction of being close to or keeping away from pushing down the mechanism.

Preferably, the slider has seted up the second groove of stepping down corresponding to the position department of anchor clamps groove below, and when anchor clamps were located the anchor clamps inslot, the second groove of stepping down was located the first groove of stepping down under.

Preferably, the pressing mechanism comprises an air cylinder, a pressing head and a pressure sensing element for detecting the pressure of the wave-shaped tongue; the pressure sensing element is connected between the cylinder and the ram.

Preferably, still including setting up the box on the base, pushing down the mechanism and installing on the box, the cylinder is vertical to be located the top of box down, and the bottom of box is located to the pressure head, and the position department that the box corresponds the pressure head has seted up and has pushed down the hole, and the lower extreme of pressure head wears out the below of box from pushing down the downthehole, and coupling assembling connects and is used for playing support and guide effect to the pressure head between cylinder and the pressure head.

Preferably, the connecting assembly comprises a guide pillar, an upper partition plate and a lower partition plate; the guide pillar is vertically connected in the box body, the upper partition plate and the lower partition plate are arranged up and down and are connected with the guide pillar in a vertical sliding mode, the lower partition plate is connected with the pressure head, and the pressure sensing element is connected between the upper partition plate and the lower partition plate.

Preferably, an electromagnetic control valve electrically connected with the cylinder is arranged on the side wall of the box body, and a time relay and a counter electrically connected with the electromagnetic control valve are arranged on the base; the electromagnetic control valve is used for receiving signals from the time relay and the counter and sending a working instruction to the air cylinder, the counter records the expansion times of the air cylinder, and the electromagnetic control valve controls the air cylinder to stop working after the set fatigue test times are reached.

Preferably, two ends of the sliding block are provided with first positioning holes which are vertically communicated, the two groups of guide rails are arranged side by side, fixing rods which are arranged in the same direction are arranged on the side of each guide rail, second positioning holes are arranged on the fixing rods corresponding to the positions under the pressing mechanism and on one side of the pressing mechanism, the first positioning holes and the second positioning holes can be fixed mutually when being coaxial, and when the sliding block slides to the position where the first positioning holes and the second positioning holes under the pressing mechanism are coaxially arranged, the sliding block is a first station and is fixed at the position for testing; when the slider slides to the position where the first positioning hole and the second position located on the side of the pressing mechanism are coaxially arranged, the slider is fixed and the clamp can be installed or taken out for the second station.

Preferably, the base is provided with a front stop block and a rear stop block at positions corresponding to the second station and the first station respectively, the first station and the second station are located between the front stop block and the rear stop block, when the slider is located at the first station, the side wall of the slider is attached to the rear stop block, and when the slider is located at the second station, the side wall of the slider is attached to the front stop block.

The utility model discloses a fatigue check out test set of plastics retainer wave form tongue, in order to carry out effectual detection to the wave form tongue, which comprises a base, locate the anchor clamps of pushing down the mechanism on the base and being used for holding the retainer, set up the mounting groove that holds the retainer in the anchor clamps, make the retainer can move and restrict its removal along second direction moving direction along the first direction, the second afterbody that is provided with the restriction wave form tongue in the mounting groove is along the limit structure that the application of force direction of pushing down the mechanism removed, check out test set carries out fatigue detection time measuring to the retainer, the head of shell receives decurrent pressure at first, and with on transmitting the wave form tongue, the wave form tongue produces deformation under the support of anchor clamps, the reaction force that the wave form tongue deformation produced transmits check out test set, the realization is to the effective record of wave form tongue fatigue data.

In addition, the bottom one side of mounting groove is for carrying out the support mesa that supports to the second afterbody of wave form tongue, and the bottom opposite side is the first groove of stepping down of dodging the first afterbody of shell, the stopper is installed in anchor clamps, and the brace table of mounting groove supports in the face of the second afterbody of wave form tongue to the first afterbody of casing is inserted in the first groove of stepping down, makes the wave form tongue can be in the free activity of vertical direction.

In addition, the top guide rail of base slides on the guide rail and is connected with the slider, offers the anchor clamps groove that is used for placing anchor clamps on the slider, anchor clamps are installed in the anchor clamps inslot, and the slider can drive anchor clamps and remove towards the direction of being close to or keeping away from pushing down the mechanism, is convenient for place the retainer and detect.

In addition, push down the mechanism and install in the box, through including cylinder, pressure head and forced induction component, and connect the installation through the coupling assembling that includes last baffle and lower baffle, and install solenoid electric valve, time relay and counter, be convenient for reliable safe carry out fatigue detection.

Drawings

FIG. 1 is a schematic view of a stopper structure of the plastic stopper wave form tongue fatigue detecting apparatus of the present invention;

FIG. 2 is a schematic view of the overall structure of the plastic stopper wave-shaped tongue fatigue detection device of the present invention;

FIG. 3 is a schematic view of the back side structure of the plastic stopper wave-shaped tongue fatigue detection device of the present invention;

FIG. 4 is a schematic structural view of the clamp of the plastic stopper wave-shaped tongue fatigue detection device of the present invention;

FIG. 5 is a schematic view of the plastic stopper wave tongue fatigue detecting apparatus of the present invention highlighting the top structure of the slider;

FIG. 6 is a schematic cross-sectional structural view of the plastic stopper wave form tongue fatigue detection device slider, clamp and stopper of the present invention;

fig. 7 is a schematic view of the plastic stopper wave tongue fatigue detecting device of the present invention for highlighting the bottom structure of the slider.

In the figure: 1. a base; 11. a pillar; 12. a guide rail; 13. a slider; 131. a clamp groove; 132. a second abdicating groove; 133. a first positioning hole; 14. a time relay; 15. a counter; 16. a start button; 17. a stop button; 18. fixing the rod; 181. a second positioning hole; 19. a front stop block; 191. a rear stop block; 2. a box body; 21. an electromagnetic control valve; 3. a clamp; 31. mounting grooves; 311. supporting the table top; 32. a first abdicating groove; 33. a first notch; 331. a second positioning surface; 34. a second notch; 4. a housing; 41. a first head portion; 42. a first tail portion; 43. a first positioning surface; 5. a wave tongue; 51. a second head; 52. a second tail portion; 6. a pressing mechanism; 61. a cylinder; 62. a pressure head; 63. a guide post; 64. an upper partition plate; 65. a lower partition plate; 66. a pressure sensing element.

Detailed Description

The following further describes a specific embodiment of the plastic stop wave form tongue fatigue detection device according to the present invention with reference to the embodiments shown in fig. 1 to 7. The plastic stopper wave-shaped tongue fatigue detecting apparatus of the present invention is not limited to the description of the following embodiments.

A plastic stop piece is shown in figure 1 and comprises an outer shell 4 and a wave tongue 5, wherein the outer shell 4 is of a frame-shaped structure and is internally provided with a rectangular accommodating groove, the wave tongue 5 is connected in the accommodating groove, the outer shell 4 comprises a first head part 41 and a first tail part 42 at two ends, the wave tongue 5 comprises a second head part 51, a second tail part 52 and a wave part which is connected between the second head part 51 and the second tail part 52 and provides elastic force, the first head part 41 of the outer shell 4 is conical, the second head part 51 of the wave tongue 5 is connected with the first head part 41, the second tail part 52 of the wave tongue 5 extends out of one side of the accommodating groove close to the first tail part 42, the second head part 51 and the second tail part 52 are vertically arranged, and when the wave tongue 5 is pressed down, the wave tongue 5 only receives vertically downward force.

A fatigue detection device for a plastic stop piece corrugated tongue comprises a base 1 and a pressing mechanism 6 arranged on the base 1, wherein a clamp 3 is arranged on the base 1, a mounting groove 31 capable of accommodating the stop piece to move along a first direction and limiting the stop piece to move along a second direction is formed in the clamp 3, the first direction is parallel to the force application direction of the pressing mechanism 6, the second direction is perpendicular to the force application direction of the pressing mechanism 6, and a limiting structure for limiting a second tail 52 of the corrugated tongue 5 to move along the force application direction of the pressing mechanism 6 is arranged in the mounting groove 31, as shown in fig. 2, because the corrugated tongue 5 is positioned in a shell 4, fatigue detection is difficult to directly carry out, and effective detection is carried out on the corrugated tongue 5.

In this embodiment, a box body 2 is provided on a base 1, a pressing mechanism 6 is installed on the box body 2, a pillar 11 for supporting the box body 2 is provided on the base 1, a pressure sensing element 66 for detecting the pressure of the wave-shaped tongue 5 is provided in the pressing mechanism 6, a clamp 3 is provided on the base 1, the clamp includes a mounting groove 31 for accommodating a stopper, and the clamp 3 directly supports the second tail 52 of the wave-shaped tongue 5, so that the wave-shaped tongue 5 can freely move in the vertical direction. Preferably, in this embodiment, one side of the bottom of the mounting groove 31 is a supporting table 311 for supporting the second tail 52 of the wave tongue 5, the other side of the bottom of the mounting groove 31 is a first avoiding groove 32 for avoiding the first tail 42 of the outer shell 4, the stopper is mounted in the clamp 3, the supporting table 311 of the mounting groove 31 supports the second tail 52 of the wave tongue 5, and the first tail 42 of the outer shell 4 is inserted into the first avoiding groove 32. When the detection equipment carries out fatigue detection on the stop piece, the head of the shell 4 is firstly pressed downwards and transmits force to the wave-shaped tongue 5, the wave-shaped tongue 5 deforms under the support of the clamp 3, and reaction force generated by deformation of the wave-shaped tongue 5 is transmitted to the detection equipment, so that the fatigue data of the wave-shaped tongue 5 can be effectively recorded.

When the fatigue test is carried out on the stoppers of different models, the clamp 3 is designed into different sizes so as to effectively test the stoppers of different models.

2-5, a guide rail 12 arranged along the width direction of a box body 2 is arranged above a base 1, the guide rail 12 is connected with a sliding block 13 in a sliding mode, a clamp groove 131 used for placing a clamp 3 is formed in the sliding block 13, the clamp 3 is installed in the clamp groove 131, and the sliding block 13 can drive the clamp 3 to move towards the direction close to or far away from a pressing mechanism 6. The clamp 3 is internally provided with a mounting groove 31 for accommodating the stop piece, the clamp 3 is mounted in the mounting groove 31, and the supporting table surface 311 and a first yielding groove 32 for the shell 4 to slide up and down are arranged below the mounting groove 31. When fatigue test is performed on the stop piece, the stop piece is placed right below the pressing mechanism 6, and the pressing mechanism 6 works to press down the stop piece to perform fatigue test.

During fatigue testing, the stop piece is placed in the clamp 3, the clamp 3 is placed in the clamp groove 131, the second tail portion 52 of the wave-shaped tongue 5 abuts against the supporting table surface 311, the first tail portion 42 of the shell 4 extends downwards into the first yielding groove 32, the sliding block 13 slides along the guide rail 12 to move the wave-shaped tongue 5 to the position below the pressing mechanism 6, the pressing mechanism 6 descends to press the stop piece, the wave-shaped tongue 5 is pressed and deformed in the mounting groove 31 at the moment, the upper portion of the shell 4 slides up and down in the mounting groove 31 after being pressed, the first tail portion 42 slides up and down in the first yielding groove 32, reaction force generated by deformation of the wave-shaped tongue 5 is transmitted into the pressure sensing element 66, and effective recording of fatigue data of the wave-shaped tongue 5 is achieved.

The side of the clamp 3 near the second tail portion 52 is the front side, and the side far from the second tail portion 52 is the rear side.

As shown in fig. 4 and 6, the front side of the fixture 3 is provided with a first notch 33 for the first head 41 to descend, one side of the first head 41 is located in the first notch 33, the middle part of the first notch 33 is provided with a second notch 34 for the wave-shaped tongue 5 to descend, one side of the wave-shaped tongue 5 is located in the second notch 34, and the first notch 33 and the second notch 34 are both communicated with the mounting groove 31. The contact surface of the first head part 41 and the second head part 51 of the shell 4 is a first positioning surface 43, the lower surface of the first notch 33 and the upper surface of the second notch 34 form a second positioning surface 331 for limiting the compression position of the wave-shaped tongue 5, and when the first positioning surface 43 descends to be in contact with the second positioning surface 331, the first positioning surface is in limited fit, and the pressing is completed.

When the wave-shaped tongue 5 is stressed to descend, the first head 41 slides up and down along the first notch 33, the main part of the wave-shaped tongue 5 slides up and down along the second notch 34, so that the stop piece can vertically ascend and descend, when the first positioning surface 43 descends to be in contact with the second positioning surface 331, the stop piece stops descending, the reaction force generated by deformation of the wave-shaped tongue 5 is transmitted into the pressure sensing element 66, and effective recording of fatigue testing of the wave-shaped tongue 5 is achieved. After the test is completed, the hold-down mechanism 6 is raised back into position and the stop is returned back into position under the resilience of the wave tongue 5 for the next test.

One side of the bottom of the mounting groove 31 is a supporting table 311 for supporting the second tail 52 of the wave-shaped tongue 5, the other side is a first avoiding groove 32 for avoiding the first tail 42 of the outer shell 4, the lower surface of the second tail 52 is attached to the supporting table 311 when the stop piece is mounted, and the lower surface of the second tail 52 is always supported by the supporting table 311 in the process of compressing the wave-shaped tongue 5, so that the stop piece is effectively supported.

As shown in fig. 7, preferably, the slider 13 is provided with a second yielding groove 132 at a position corresponding to the lower side of the clamp groove 131, when the clamp 3 is located in the clamp groove 131, the second yielding groove 132 is located right below the first yielding groove 32, and the first tail portion 42 of the housing 4 can slide into the second yielding groove 132 when being pressed and lowered, so as to prevent the movement of the stopper from being limited.

As shown in fig. 2, the pressing mechanism 6 preferably includes a cylinder 61, a pressing head 62, and a pressure sensing element 66 for detecting the pressure of the wave tongue 5; the pressure sensing member 66 is connected between the cylinder 61 and the ram 62. The cylinder 61 is vertical to be located the top of box 2 down, and the pressure head 62 is located the bottom of box 2, and the box 2 has seted up down the pressure hole corresponding to pressure head 62's position department, and the lower extreme of pressure head 62 is worn out the below of box 2 from pushing down downthehole, and coupling assembling connects and is used for playing support and guide effect to pressure head 62 between cylinder 61 and pressure head 62, and pressure-sensitive element 66 locates in the coupling assembling.

When the fatigue test is carried out, the stop piece is driven by the slide block 13 to move along the guide rail 12 to be right below the pressure head 62, the air cylinder 61 works and drives the pressure head 62 to descend through the connecting component, the fatigue test is carried out on the stop piece, the result of the fatigue test is transmitted into the base 1 through the pressure sensing element 66, after the test is completed, the air cylinder 61 drives the pressure head 62 to return to the original position, and the stop piece slides out from the lower part of the pressure head 62 and returns to the original position to carry out the test of the next group.

Preferably, the connecting assembly includes a guide post 63, an upper spacer 64 and a lower spacer 65. The guide post 63 is vertically connected in the box body 2, the upper partition plate 64 and the lower partition plate 65 are arranged up and down and are vertically connected with the guide post 63 in a sliding manner, the lower partition plate 65 is connected with the pressure head 62, and the pressure sensing element 66 is connected between the upper partition plate 64 and the lower partition plate 65. When the cylinder 61 works, the upper partition plate 64 and the lower partition plate 65 drive the pressure sensing element 66 to vertically move up and down along the guide post 63, when the pressure head 62 compresses the stop piece, the reaction force of the force applied to the wave-shaped tongue 5 is transmitted to the pressure sensing element 66 through the lower partition plate 65, and the pressure sensing element 66 outputs the sensed signal so as to monitor the pressure pressed each time.

Preferably, an electromagnetic control valve 21 electrically connected to the cylinder 61 is provided on a sidewall of the case 2, and a time relay 14 and a counter 15 electrically connected to the electromagnetic control valve 21 are provided on the base 1. The electromagnetic control valve 21 is used for receiving signals from the time relay 14 and the counter 15 and sending an operating instruction to the air cylinder 61, the counter 15 records the expansion and contraction times of the air cylinder 61, and after the set fatigue test times are reached, the electromagnetic control valve 21 controls the air cylinder 61 to stop operating.

Preferably, as shown in fig. 2 and 5, two ends of the slider 13 are provided with first positioning holes 133 penetrating up and down, two sets of guide rails 12 are arranged side by side, a fixing rod 18 arranged in the same direction is arranged on the side of each guide rail 12, second positioning holes 181 are arranged on the fixing rod 18 at positions corresponding to the position under the pressing mechanism 6 and the position on one side of the pressing mechanism 6, and when the first positioning holes 133 and the second positioning holes 181 are coaxially arranged, the slider 13 and the guide rails 12 can be fixed to each other by fixing members such as screws. Two sets of positioning holes make the slider 13 have two stations in common: the first station is a test station, at this time, the slide block 13 slides to a position where the first positioning hole 133 and the second positioning hole 181 located right below the pressing mechanism 6 are coaxially arranged, and the slide block 13 is fixed at the test station during testing; the second station is the installation position, and slider 13 slides to the position department that first locating hole 133 set up with the second fixed position that is located pushing down mechanism 6 side is coaxial this moment, fixes slider 13 here, when installing clamp 3 or taking out clamp 3 after testing, all need go on here.

When the fatigue test of the wave-shaped tongue 5 is carried out, the slide block 13 is positioned at a first station, the stop piece is installed in the clamp 3, the clamp 3 is installed on the slide block 13, the slide block 13 is moved to a second station along the guide rail 12, the pressing mechanism 6 works to carry out the fatigue test on the wave-shaped tongue 5, and after the test is finished, the slide block 13 returns to the first station along the slide rail to wait for the next test. Thus, the stop piece can carry out fatigue test efficiently and conveniently.

Preferably, a front stop block 19 and a rear stop block 191 are respectively arranged at positions of the base 1 corresponding to the second station and the first station, the first station and the second station are located between the front stop block 19 and the rear stop block 191, when the slider 13 is located at the first station, the side wall of the slider 13 is attached to the rear stop block 191, when the slider 13 is located at the second station, the side wall of the slider 13 is attached to the front stop block 19 to prevent the slider 13 from sliding out of the base 1, and meanwhile, the front stop block 19 and the rear stop block 191 play a certain positioning role on the slider 13.

Preferably, the base 1 is provided with a start button 16 and a stop button 17, and the air cylinder 61 is operated for starting the test when the start button 16 is pressed, and the air cylinder 61 is deactivated for stopping the test when the stop button 17 is pressed.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a plastics stopper wave form tongue fatigue detection equipment, includes base (1) and locates pushing down mechanism (6) on base (1), its characterized in that: be equipped with anchor clamps (3) on base (1), seted up in anchor clamps (3) and can hold the stopper and remove and restrict its mounting groove (31) that remove along second direction moving direction along first direction, first direction be on a parallel with the application of force direction of pushing down mechanism (6), the second direction perpendicular to push down the application of force direction of mechanism (6), be provided with the limit structure that second afterbody (52) of restriction wave form tongue (5) removed along the application of force direction of pushing down mechanism (6) in mounting groove (31).

2. The plastic stop wave tongue fatigue detection apparatus of claim 1, wherein: the limiting structure comprises a supporting table surface (311) which is arranged on one side of the bottom of the mounting groove (31) and used for supporting a second tail part (52) of the wave-shaped tongue (5), and the other side of the bottom of the mounting groove (31) is a first yielding groove (32) which is used for avoiding a first tail part (42) of the shell (4).

3. The plastic stop wave tongue fatigue detection apparatus of claim 1, wherein: a first notch (33) for enabling a first head (41) of the shell (4) to descend is formed in the side wall of one side of the clamp (3), a second notch (34) for enabling the corrugated tongue (5) to descend is formed in the middle of the first notch (33), and the first notch (33) and the second notch (34) are communicated with the mounting groove (31); the lower surface of the first notch (33) and the upper surface of the second notch (34) form a second positioning surface (331) for limiting the compression position of the wave-shaped tongue (5).

4. The plastic stop wave tongue fatigue detection apparatus of claim 3, wherein: be equipped with guide rail (12) on base (1), slide on guide rail (12) and be connected with slider (13), offer anchor clamps groove (131) that are used for placing anchor clamps (3) on slider (13), install in anchor clamps groove (131) anchor clamps (3), slider (13) can drive anchor clamps (3) and remove towards the direction of being close to or keeping away from pushing down mechanism (6).

5. The plastic stop wave tongue fatigue detection apparatus of claim 4, wherein: the slider (13) is provided with a second yielding groove (132) at a position corresponding to the lower part of the clamp groove (131), and when the clamp (3) is positioned in the clamp groove (131), the second yielding groove (132) is positioned under the first yielding groove (32).

6. The plastic stop wave tongue fatigue detection apparatus of claim 1, wherein: the pressing mechanism (6) comprises an air cylinder (61), a pressure head (62) and a pressure sensing element (66) for detecting the pressure of the wave tongue (5); the pressure sensing element (66) is connected between the cylinder (61) and the ram (62).

7. The plastic stop wave tongue fatigue detection apparatus of claim 6, wherein: still including setting up box (2) on base (1), push down mechanism (6) and install on box (2), the top of box (2) is located downwards to cylinder (61) vertical, and the bottom of box (2) is located in pressure head (62), and the hole that pushes down has been seted up to the position department that box (2) corresponds pressure head (62), and the lower extreme of pressure head (62) is worn out the below of box (2) from pushing down downthehole, and coupling assembling connects and is used for playing support and guide effect to pressure head (62) between cylinder (61) and pressure head (62).

8. The plastic stop wave tongue fatigue detection apparatus of claim 7, wherein: the connecting assembly comprises a guide post (63), an upper partition plate (64) and a lower partition plate (65); the guide post (63) is vertically connected in the box body (2), the upper partition plate (64) and the lower partition plate (65) are vertically arranged and are vertically connected with the guide post (63) in a sliding mode, the lower partition plate (65) is connected with the pressure head (62), and the pressure sensing element (66) is connected between the upper partition plate (64) and the lower partition plate (65).

9. The plastic stop wave tongue fatigue detection apparatus of claim 7, wherein: an electromagnetic control valve (21) electrically connected with the cylinder (61) is arranged on the side wall of the box body (2), and a time relay (14) and a counter (15) electrically connected with the electromagnetic control valve (21) are arranged on the base (1); the electromagnetic control valve (21) is used for receiving signals from the time relay (14) and the counter (15) and sending an operating instruction to the air cylinder (61), the counter (15) records the expansion and contraction times of the air cylinder (61), and after the set fatigue test times are reached, the electromagnetic control valve (21) controls the air cylinder (61) to stop operating.

10. The plastic stop wave tongue fatigue detection apparatus of claim 4, wherein: the two ends of the sliding block (13) are provided with first positioning holes (133) which are vertically communicated, the two groups of guide rails (12) are arranged side by side, fixing rods (18) which are arranged in the same direction are arranged on the side of each guide rail (12), second positioning holes (181) are formed in the positions, corresponding to the positions under the pressing mechanism (6) and on one side of the pressing mechanism (6), on the fixing rods (18), the first positioning holes (133) and the second positioning holes (181) can be fixed to each other when being coaxial, and when the sliding block (13) slides to the position where the first positioning holes (133) and the second positioning holes (181) which are located under the pressing mechanism (6) are coaxially arranged, the sliding block (13) is a first station and is fixed at the position for testing; when the slide block (13) slides to a position where the first positioning hole (133) is coaxially arranged with a second position located on the side of the pressing mechanism (6), the slide block (13) is fixed and the clamp (3) can be mounted or taken out for a second station.

11. The plastic stop wave tongue fatigue detection apparatus of claim 10, wherein: the base (1) is provided with a front stop block (19) and a rear stop block (191) at positions corresponding to the second station and the first station respectively, the first station and the second station are located between the front stop block (19) and the rear stop block (191), when the sliding block (13) is located at the first station, the side wall of the sliding block (13) is attached to the rear stop block (191), and when the sliding block (13) is located at the second station, the side wall of the sliding block (13) is attached to the front stop block (19).