Pneumatic collision test bench

Abstract

The utility model relates to the technical field of pneumatic collision test benches, and discloses a pneumatic collision test bench, which comprises a detection bench, support legs are uniformly mounted on two sides of the bottom end of the detection bench, guide rods are mounted on two sides of the top end of the detection bench, and sliders are sleeved outside the guide rods. According to the utility model, the to-be-tested piece is fixed through the fixing table, and the cushion block is utilized to ensure that the top end test surface of the to-be-tested piece is higher than the top end of the fixing table so as to ensure that the impact table impacts the to-be-tested piece, so that when the impact table is not detected and is accidentally separated, the sliding block can firstly contact the reinforcing table; and the downward sliding of the sliding sleeve along the guide rod is intercepted by utilizing frictional resistance among the clamping ring, the first impedance ring and the second impedance ring, so that the direct impact effect of the impact table on the top end of the fixed table is relieved, and accidental impact protection on the fixed table is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic collision test benches, and particularly relates to a pneumatic collision test bench. Background Technique

[0002] A pneumatic impact test bench is a test device that uses compressed air drive to simulate the impact environment that a product may encounter in actual applications. By evaluating the impact resistance of the product and combining test data, it is convenient to optimize the structural strength of the product and improve the product quality;

[0003] The existing pneumatic collision test benches mainly consist of a tabletop, an impact body, a lifting cylinder, a bottom plate, etc. The impact body is used to impact the test piece on the tabletop downward, and various sensors are used to detect data, so as to analyze the impact resistance of the test piece. In the existing products, due to the relatively large downward impact force of the impact body, in order to avoid accidental detachment of the impact body, the impact body generally needs to be locked. However, the existing locking mechanisms are not easy to buffer the impact body to isolate the direct impact on the lower tabletop when the impact body accidentally detaches, so there is a certain room for improvement. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pneumatic collision test bench to solve the problem that the existing pneumatic collision test bench is not easy to buffer and protect the test tabletop as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A pneumatic collision test bench, including a detection table, legs are evenly installed on both sides of the bottom end of the detection table, guide rods are installed on both sides of the top end of the detection table, and sliders are sleeved on the outer parts of the guide rods. An impact table is connected between the two sliders. Cylinders are arranged on the outer sides of the two sliders away from the impact table, and the bottom ends of the cylinders are connected to the top end of the detection table. A fixed table is installed on the top end of the detection table below the impact table, and a cushion block is installed inside the fixed table. Pressure relief mechanisms are arranged on the outer parts of the guide rods below the two sliders, and resistance mechanisms are arranged at the bottom ends of the pressure relief mechanisms. The top height of the pressure relief mechanism is less than the top height of the test piece on the cushion block, and the top height of the pressure relief mechanism is greater than the top height of the fixed table.

[0006] Preferably, the pressure relief mechanism includes a sliding sleeve sleeved on the outer part of the guide rod, a snap ring is installed inside the sliding sleeve, a card slot is opened on the outer part of the guide rod, the inner side of the snap ring abuts against the inner wall of the card slot, a strengthening table is installed at the top end of the sliding sleeve, and first impedance rings are evenly sleeved on the outer part of the guide rod below the card slot.

[0007] Preferably, the outer diameter of the first impedance ring is adapted to the inner diameter of the sliding sleeve, and the first impedance rings are evenly distributed on the guide rod.

[0008] Preferably, two second impedance rings are sleeved outside the guide rod below the first impedance ring, and the two second impedance rings are distributed at intervals up and down, and the outer diameter of the second impedance ring is greater than the inner diameter of the sliding sleeve.

[0009] Preferably, the top view cross-section of the strengthening platform is annular, and the top end surface of the strengthening platform is an arched structure when viewed from the side.

[0010] Preferably, the resistance mechanism includes a spring installed at the top of the detection table, and the spring is sleeved outside the guide rod. A resistance table is installed at the top of the spring, and the resistance table is located below the sliding sleeve.

[0011] Preferably, a guide groove is formed at the top of the resistance table, and a plurality of balls are annularly and equally spaced inside the guide groove, and the tops of the balls are embedded in the bottom end of the sliding sleeve.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] (1) Through the fixing table, it is convenient to fix the workpiece to be measured, and by using the cushion block, the height of the top test surface of the workpiece to be measured is ensured to be the same as the top of the fixing table, so as to ensure the impact of the impact table on the workpiece to be measured. Then, when the impact table accidentally detaches without detection, the slider can first contact the strengthening platform, and the frictional resistance between the snap ring, the first impedance ring and the second impedance ring is used to intercept the downward sliding of the sliding sleeve along the guide rod, so as to slow down the direct impact effect of the impact table on the top of the fixing table, so as to achieve accidental impact protection for the fixing table;

[0014] (2) Through the elastic action of the spring, when the spring is compressed, its upward restoring force is used to resist the downward impact force, so as to further slow down the downward sliding of the sliding sleeve, so as to increase the absorption of the impact force by the frictional resistance, thereby further slowing down the rigid impact of the impact table on the fixing table. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is the main view sectional structure diagram of the present utility model;

[0017] Figure 2 It is the three-dimensional structure diagram of the distribution of the first impedance ring of the present utility model;

[0018] Figure 3 Schematic three-dimensional sectional structure diagram of the sliding sleeve of the present utility model;

[0019] Figure 4 Schematic three-dimensional structure diagram of the resistance ring of the present utility model.

[0020] Explanation of the reference numerals in the figure: 1, detection table; 2, support leg; 3, fixed table; 4, cushion block; 5, guide rod; 6, cylinder; 7, slider; 8, impact table; 9, sliding sleeve; 10, spring; 11, resistance table; 12, card slot; 13, first impedance ring; 14, second impedance ring; 15, strengthening table; 16, snap ring; 17, ball; 18, guide groove. Specific implementation manner

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a pneumatic collision test bench, including a detection table 1, support legs 2 are uniformly installed on both sides of the bottom end of the detection table 1, guide rods 5 are installed on both sides of the top end of the detection table 1, and sliders 7 are sleeved on the outer sides of the guide rods 5. An impact table 8 is connected between the two sliders 7. Cylinders 6 are arranged on the outer sides of the two sliders 7 away from the impact table 8, and the bottom ends of the cylinders 6 are connected to the top end of the detection table 1. A fixed table 3 is installed on the top end of the detection table 1 below the impact table 8, and a cushion block 4 is installed inside the fixed table 3. Pressure relief mechanisms are arranged on the outer sides of the guide rods 5 below the two sliders 7;

[0023] The pressure relief mechanism includes a sliding sleeve 9 sleeved on the outer side of the guide rod 5, and a snap ring 16 is installed inside the sliding sleeve 9. A card slot 12 is opened on the outer side of the guide rod 5. The inner side of the snap ring 16 abuts against the inner wall of the card slot 12. A strengthening table 15 is installed at the top end of the sliding sleeve 9. First impedance rings 13 are uniformly sleeved on the outer side of the guide rod 5 below the card slot 12;

[0024] The outer diameter of the first impedance ring 13 is adapted to the inner diameter of the sliding sleeve 9, and the first impedance rings 13 are arranged at equal intervals on the guide rod 5;

[0025] Two second impedance rings 14 are sleeved on the outer side of the guide rod 5 below the first impedance ring 13 and are spaced apart from each other up and down, and the outer diameter of the second impedance ring 14 is greater than the inner diameter of the sliding sleeve 9;

[0026] The top view cross-section of the strengthening platform 15 is annular, and the top surface of the strengthening platform 15 is arched in side view;

[0027] Specifically, as Figure 1 , Figure 2 and Figure 3 shown, when in use, the special structure of the strengthening platform 15 is utilized to increase the impact resistance of the top end of the sliding sleeve 9, so as to disperse the downward impact force on the sliding block 7, and through the blocking effects of the first impedance ring 13 and the second impedance ring 14 on the snap ring 16 and the sliding sleeve 9, the downward movement friction of the sliding sleeve 9 along the guide rod 5 is increased, thereby improving the buffering effect;

[0028] Moreover, resistance mechanisms are arranged at the bottom ends of the pressure-relieving mechanisms. The top end height of the pressure-relieving mechanisms is less than the top end height of the test piece on the cushion block 4, and the top end height of the pressure-relieving mechanisms is greater than the top end height of the fixed platform 3;

[0029] The resistance mechanism includes a spring 10 installed at the top end of the detection platform 1, and the spring 10 is sleeved outside the guide rod 5. A resistance platform 11 is installed at the top end of the spring 10, and the resistance platform 11 is located below the sliding sleeve 9;

[0030] A guide groove 18 is formed at the top end of the resistance platform 11, and a plurality of balls 17 are annularly and equally spaced inside the guide groove 18. The top ends of the balls 17 are embedded in the bottom end of the sliding sleeve 9;

[0031] Specifically, as Figure 1 , Figure 4 shown, when in use, the elastic reset of the spring 10 is utilized to further improve the pressure-relieving effect.

[0032] Working principle: When the present utility model is in use, first place the cushion block 4 inside the fixed platform 3, and place the test piece on the top end of the cushion block 4 to ensure that the top surface of the test piece extends out of the outside of the fixed platform 3, and at the same time ensure that the top surface height of the test piece is higher than the top end of the strengthening platform 15. Start the air cylinder 6 to make the sliding block 7 rise along the guide rod 5 to drive the impact platform 8 to rise, and then start the air cylinder 6 to exhaust air to make the impact platform 8 impact downward, so that the bottom end of the impact platform 8 hits the top end of the test piece to achieve the impact test effect;

[0033] Secondly, when the impact platform 8 accidentally detaches and no test piece is placed on the top end of the cushion block 4, the sliding block 7 slides downward along the guide rod 5 to make the impact platform 8 contact the snap ring 16, and wait for the sliding sleeve 9 to slide downward to make the snap ring 16 disengage from the card slot 12, and utilize the first impedance ring 13 to block the continuous downward sliding of the snap ring 16, thereby increasing the frictional resistance between the sliding sleeve 9 and the guide rod 5. Cooperate with the second impedance ring 14 to further slow down the continuous downward sliding of the sliding sleeve 9, and thus utilize the frictional force to absorb the impact force to slow down the impact of the impact platform 8 on the fixed platform 3;

[0034] Finally, due to the downward movement of the sliding sleeve 9, it presses against the resistance platform 11, and then compresses the spring 10. By utilizing the upward reset of the spring 10, the pressure relief effect can be further improved.

[0035] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0036] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A pneumatic collision test bench, comprising a test bench (1), characterized in that: Legs (2) are evenly installed on both sides of the bottom of the detection platform (1), guide rods (5) are installed on both sides of the top of the detection platform (1), and sliders (7) are sleeved on the outside of the guide rods (5), an impact platform (8) is connected between the two sliders (7), cylinders (6) are arranged on the outsides of the sliders (7) on both sides away from the impact platform (8), and the bottom ends of the cylinders (6) are connected to the top of the detection platform (1), a fixed platform (3) is installed on the top of the detection platform (1) below the impact platform (8), and a cushion block (4) is installed inside the fixed platform (3), a pressure relief mechanism is arranged on the outside of the guide rods (5) below the two sliders (7), and a resistance mechanism is arranged on the bottom ends of the pressure relief mechanism, the top height of the pressure relief mechanism is less than the top height of the test piece on the cushion block (4), and the top height of the pressure relief mechanism is greater than the top height of the fixed platform (3).

2. A pneumatic collision test bench according to claim 1, characterized in that: The pressure relief mechanism comprises a sliding sleeve (9) sleeved on the outside of the guide rod (5), and a retaining ring (16) is installed inside the sliding sleeve (9), a retaining groove (12) is opened on the outside of the guide rod (5), the inner side of the retaining ring (16) abuts against the inner wall of the retaining groove (12), a reinforcing platform (15) is installed on the top of the sliding sleeve (9), and a first impedance ring (13) is evenly sleeved on the outside of the guide rod (5) below the retaining groove (12).

3. A pneumatic collision test bench according to claim 2, characterized in that: The outer diameter of the first impedance ring (13) is matched to the inner diameter of the sliding sleeve (9), and the first impedance rings (13) are distributed at equal intervals on the guide rod (5).

4. The pneumatic collision test bench according to claim 2, characterized in that: The guide rod (5) below the first impedance ring (13) is sleeved with two second impedance rings (14) spaced apart from each other in the upper and lower parts, and the outer diameter of the second impedance ring (14) is greater than the inner diameter of the sliding sleeve (9).

5. The pneumatic collision test bench according to claim 2, characterized in that: The top view cross section of the reinforcing platform (15) is annular, and the top end surface of the reinforcing platform (15) is an arched structure when viewed from the side.

6. The pneumatic collision test bench according to claim 2, characterized in that: The resistance mechanism comprises a spring (10) mounted on the top of the detection platform (1), and the spring (10) is sleeved on the outside of the guide rod (5). A resistance platform (11) is mounted on the top of the spring (10), and the resistance platform (11) is located below the sliding sleeve (9).

7. The pneumatic collision test bench according to claim 6, characterized in that: A guide groove (18) is provided at the top of the resistance platform (11), and balls (17) are distributed in an annular manner at equal intervals inside the guide groove (18), and the top ends of the balls (17) are embedded in the bottom end of the sliding sleeve (9).

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