Pneumatic rod impact testing machine

Abstract

The present application relates to the technical field of impact testing machine, especially to a pneumatic rod impact testing machine, which comprises a support, an installation cylinder is arranged on the top of the support, a cavity and a channel which is concentric with the cavity and penetrates up and down are arranged in the installation cylinder, the upper end of the channel is communicated with the air pump arranged on the top of the support through a connecting pipe, the lower end is communicated with the transparent accelerating tube arranged on the top wall in the support, the inner hole of the accelerating tube is placed with an impact ball, an infrared sensor is arranged near the opening at the lower end of the accelerating tube, a rubber ring and three magnetic rings which are placed in repulsion are sequentially and superimposedly arranged in the cavity from bottom to top, the center hole of the rubber ring and the center hole of the magnetic ring are smaller than the diameter of the impact ball, and a fixing mechanism for fixing the accelerating tube is arranged on the inner side wall of the support. The present application adopts the combination of air thrust, repulsion and gravity to carry out continuous impact test, avoids the influence of secondary impact of the impact ball on the accuracy of data, has high safety and accurate impact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of impact testing machine, in particular to a pneumatic rod impact testing machine. BACKGROUND

[0002] Impact test can be used to detect the ability of the test piece to withstand impact damage, and the structure strength of the test piece is optimized through test data to improve its impact resistance, one of the core components in the impact test process is an impact testing machine that can generate enough impact energy or impact speed.

[0003] Pneumatic rod has been applied in aviation, high-speed rail, automobile and medical devices and furniture industries, and the surface of pneumatic rod is often damaged by collision, which affects the normal movement of piston rod, therefore, the stability and surface impact resistance of pneumatic rod are very important, and impact test of pneumatic rod is essential, the internal structure of pneumatic rod is hollow, which inevitably leads to secondary impact after impact, affecting the test effect. SUMMARY

[0004] The present application aims to solve the problems in the prior art that the impact testing machine is only used for pneumatic rod and the pneumatic rod is subjected to secondary impact during testing, and provides a pneumatic rod impact testing machine.

[0005] In order to overcome the defects in the background art, the technical scheme adopted by the present application to solve the technical problems is: a pneumatic rod impact testing machine, comprising a support, a support foot is arranged at the bottom of the support, a lifting mechanism is arranged on the inner bottom plate of the support, a clamping mechanism for installing the pneumatic rod is arranged at the upper end of the lifting mechanism, an installation cylinder is arranged at the top of the support, a cavity and a passage concentric with the cavity and penetrating up and down are arranged in the installation cylinder, the upper end of the passage is communicated with the air pump arranged at the top of the support through a connecting pipe, and the lower end is communicated with the transparent accelerating tube arranged on the inner top wall of the support, the inner hole of the accelerating tube is used to place an impact ball for impact test, an infrared sensor is arranged near the opening at the lower end of the accelerating tube, a rubber ring and three magnetic rings with repelling surfaces are arranged in the cavity from bottom to top, the center hole of the rubber ring and the center hole of the magnetic ring are smaller than the diameter of the impact ball, and a fixing mechanism for fixing the accelerating tube is arranged on the inner side wall of the support.

[0006] Further improvement, the fixing mechanism comprises two U-shaped connecting seats and two clamping plates, the two U-shaped connecting seats are arranged on the inner side wall of the support respectively, two clamping plates are hingedly arranged between the U-shaped connecting seats and are in close contact, and the center of the two clamping plates forms a semicircular ring with the same shape as the accelerating tube to clamp the accelerating tube.

[0007] Further improvement, the lifting mechanism is an electric folding lifting platform.

[0008] Further improvement, including the fixed mechanism is provided with at least two.

[0009] Further improvement, including the clamping mechanism includes a placement box, V-shaped block placed in the placement box and support plate, the support plate is provided with a rectangular opening opposite to the V-shaped opening of the V-shaped block, the two sides of the opening are respectively provided with a waist-shaped hole of strip structure, the waist-shaped holes are provided with a cross plate between them, the cross plate is penetrated by a bolt at both ends of the cross plate and is penetrated into the waist-shaped hole and is tightened with a nut so as to control the adjustment of the cross plate up and down.

[0010] The beneficial effects of the present application are: the device uses air thrust, repulsion and gravity to combine continuous impact test, which can avoid the influence of secondary impact of the impact ball on data accuracy, has high safety, accurate impact, and the introduction of rust-proof oil in the placement box can also play a role in shock absorption and noise reduction. BRIEF DESCRIPTION OF DRAWINGS

[0011] The present application will be further described below in conjunction with the drawings and examples.

[0012] Figure 1 is the front view of the present application;

[0013] Figure 2 is the left view of the present application;

[0014] Figure 3 is the internal structure diagram of the placement box in the present application;

[0015] Figure 4 is the front view of the support plate in the present application;

[0016] In the figure, 1 is an electric folding lifting platform, 2 is a U-shaped connecting seat, 3 is an infrared sensor, 4 is a rubber ring, 5 is a chamber, 6 is a mounting cylinder, 7 is a channel, 8 is a magnetic ring, 9 is a connecting pipe, 10 is a gas pump, 11 is a support, 12 is an acceleration pipe, 13 is an impact ball, 14 is a clamping plate, 15 is a placement box, 16 is a supporting leg, 17 is a V-shaped block, 18 is a cross plate, 19 is a support plate, 20 is an opening, 21 is a waist-shaped hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. All other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] According to Figure 1 and Figure 2As shown, a kind of pneumatic rod impact testing machine, including support 11, the bottom of the support 11 is provided with support leg 16, the bottom plate in the support 11 is provided with lifting mechanism, effectively control impact position, adjust lifting mechanism to lift and be measured to the face of pneumatic rod is close to the orifice of acceleration tube 12, so that impact is more accurate, guarantee that impact ball 13 rebound enters acceleration tube 12, the upper end of the lifting mechanism is equipped with the clamping mechanism for installing pneumatic rod, the top of the support 11 is provided with installation cylinder 6, the installation cylinder 6 is provided with chamber 5 and the passage 7 concentric with chamber 5 and up and down, the upper end of the passage 7 is communicated with the air pump 10 provided on the top of the support 11 by connecting pipe 9, the lower end is communicated with the transparent material acceleration tube 12 provided on the inner top wall of the support 11, the inner hole of the acceleration tube 12 is placed for the impact ball 13 for up and down movement impact test, the lower end of the acceleration tube 12 is close to the opening and is provided with infrared sensor 3, the chamber 5 is sequentially stacked from bottom to top with rubber ring 4 and 3 repulsion surface opposite magnetic ring 8, the center hole of the rubber ring 4 and the center hole of the magnetic ring 8 are all smaller than the diameter of the impact ball 13, the inner side wall of the support 11 is provided with fixing mechanism for fixing acceleration tube 12, negative pressure is formed in installation cylinder 6 and acceleration tube 12 when air is pumped by air pump 10, impact ball 13 moves upward and makes mutually repulsive magnetic ring 8 press together, the face of the measured pneumatic rod is aligned and close to the orifice of acceleration tube 12, at this time, when air pump 10 exhausts in installation cylinder 6, under the action of air, repulsion force and gravity of impact ball 13, impact ball 13 impacts the measured pneumatic rod, after impact, when the impact ball 13 rebounding into acceleration tube 12 passes through infrared sensor 3, infrared sensor 3 receives the infrared ray reflected from impact ball 13, air pump 10 is opened, the suction force generated when air pump 10 pumps air makes impact ball 13 return to installation cylinder 7 and press magnetic ring 8, by using the above implementation, the air thrust, magnetic force and gravity generated by air pump 10 are combined to carry out continuous impact test, with high degree of automation, accurate impact, avoid secondary impact after impact ball 13 bounces, ensure that the measured data is accurate.

[0019] The fixing mechanism includes two U-shaped connecting seats 2 and two clamping plates 14, the two U-shaped connecting seats 2 are respectively arranged on the inner side wall of the support 11, and the two clamping plates 14 are hingedly arranged between the two U-shaped connecting seats 2 and are in close contact, the center of the two clamping plates 14 forms a semicircular ring with the same shape as the acceleration tube 12 to clamp the acceleration tube 12, by using the above implementation, the fixing mechanism ensures that the vibration generated when impact ball 13 moves in the acceleration tube 12 is reduced, and the safety of impact test and the correctness of experimental data are ensured.

[0020] The lifting mechanism is an electric folding lifting platform 1, the electric folding lifting platform 1 lifts the clamping mechanism upward, the pneumatic rod installed on the clamping mechanism is lifted to align the port of the acceleration tube 12, the impact position is accurately controlled, and the electric folding lifting platform 1 can be applied to pneumatic rods of different sizes, so the application range is wide.

[0021] The fixing mechanism is provided with at least two, which guarantees the stability of the acceleration tube 12 when impact experiment is carried out.

[0022] According to Figure 3 and Figure 4 As shown in the drawings, the clamping mechanism comprises a placing box 15, a V-shaped block 17 placed in the placing box 15, and a supporting plate 19, wherein the supporting plate 19 is provided with a rectangular opening 20 opposite to the V-shaped opening of the V-shaped block 17, and the two sides of the opening 20 are respectively provided with waist-shaped holes 21 in strip structure, and a cross plate 18 is arranged between the waist-shaped holes 21, and the cross plate 18 is penetrated by bolts at both ends of the cross plate 18 and is penetrated into the waist-shaped holes 21 and is screwed with nuts so as to control the up and down adjustment of the cross plate 18. By using the above-mentioned embodiment, the pneumatic rod can be horizontally placed on the V-shaped block 17, and the left and right shaking of the pneumatic rod is prevented, the piston rod is placed on the cross plate 18, the up and down adjustment of the cross plate 18 is adjusted to keep the pneumatic rod and the piston rod in the horizontal direction, the vibration of the piston rod during impact test is prevented, the pneumatic rod of various sizes can be applied, the anti-rust oil is poured into the placing box 15, and the impact test of the pneumatic rod has the effect of shock absorption and noise reduction when the oil surface of the anti-rust oil is lower than the plane to be impacted.

[0023] Working principle: first, open the air pump 10, put the impact ball 13 into the acceleration tube 12, the air pump 10 forms negative pressure in the acceleration tube 12 and the installation cylinder 6, the impact ball 13 enters the installation cylinder 6, and the impact ball 13 blocks the center hole of the magnetic ring 8 and presses the three magnetic rings 8 together.

[0024] The pneumatic rod is placed on the V-shaped block 17, the piston rod is placed on the cross plate 18, and the pneumatic rod is adjusted to be horizontal by adjusting the bolts, the placing box 15 is lifted upward by operating the electric folding lifting platform 1, the surface to be tested of the pneumatic rod is aligned and close to the orifice of the acceleration tube 12, at this time, when the air pump 10 exhausts the installation cylinder 6, the impact ball 13 moves downward under the air thrust, the repulsive force between the magnetic rings 8 and the gravity of the impact ball 13, when the impact ball 13 passes through the infrared sensor 3, the air pump 10 is closed when the infrared sensor 3 receives the infrared rays reflected from the impact ball 13, the impact ball 13 and the pneumatic rod collide and rebound, and then pass through the infrared sensor 3 again, the air pump 10 is opened when the infrared sensor 3 receives the infrared rays reflected from the impact ball 13, the impact ball 13 returns to the installation cylinder 6 and is ready for the next test, the placing box 15 is lowered by the electric folding lifting platform, and finally the pneumatic rod is taken off.

[0025] The above-mentioned is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A pneumatic rod impact testing machine, comprising a support (11), wherein the bottom of the support (11) is provided with support legs (16), characterized in that, A lifting mechanism is provided on the bottom plate of the bracket (11). The upper end of the lifting mechanism is provided with a clamping mechanism for installing a pneumatic rod. An installation cylinder (6) is provided on the top of the bracket (11). A chamber (5) and a channel (7) concentric with and penetrating the chamber (5) are provided inside the installation cylinder (6). The upper end of the channel (7) is connected to the air pump (10) provided on the top of the bracket (11) through a connecting pipe (9), and the lower end is connected to the acceleration tube (12) made of transparent material provided on the top wall of the bracket (11). An impact ball (13) for impact testing is placed inside the inner hole and channel (7) of (12). An infrared sensor (3) is set at the lower end of the acceleration tube (12) near the opening. A rubber ring (4) and three magnetic rings (8) with opposite repulsion surfaces are stacked in the chamber (5) from bottom to top. The central hole of the rubber ring (4) and the central hole of the magnetic ring (8) are both smaller than the diameter of the impact ball (13). A fixing mechanism for fixing the acceleration tube (12) is provided on the inner side wall of the bracket (11).

2. The pneumatic rod impact testing machine as described in claim 1, characterized in that: The fixing mechanism includes two U-shaped connecting seats (2) and two clamping plates (14). The two U-shaped connecting seats (2) are respectively arranged opposite to each other on the inner side wall of the bracket (11). Two clamping plates (14) are hinged between the U-shaped connecting seats (2) and fit together. The center of the two clamping plates (14) forms a semi-circular ring with the same shape as the acceleration tube (12) to clamp the acceleration tube (12).

3. The pneumatic rod impact testing machine as described in claim 1, characterized in that: The lifting mechanism is an electric folding lifting platform (1).

4. The pneumatic rod impact testing machine as described in claim 1, characterized in that: At least two fixing mechanisms are provided.

5. The pneumatic rod impact testing machine as described in claim 1, characterized in that: The clamping mechanism includes a placement box (15), a V-shaped block (17) placed in the placement box (15), and a support plate (19). The support plate (19) is provided with a rectangular opening (20) opposite to the V-shaped opening of the V-shaped block (17). The two sides of the opening (20) are respectively provided with waist-shaped holes (21) with strip structure. A horizontal plate (18) is provided between the waist-shaped holes (21). The horizontal plate (18) is controlled to move up and down by bolts passing through both ends of the horizontal plate (18) and being tightened with nuts.

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