Low-cost oscillating bar impact automatic brake experiment device

Abstract

The utility model discloses a low-cost swing rod impact automatic brake experiment device, which relates to the technical field of automobile safety part performance safety impact tests and comprises a swing rod shaft, a lifting mechanism fixedly connected with the swing rod shaft and used for adjusting initial height, two bearing seats respectively fixed on two sides of the swing rod shaft and used for rotatably supporting the swing rod shaft. The swing rod assembly is fixed on the swing rod shaft and located between the two bearing seats, a signal generator special part capable of adjusting the angle position and a support fixed on the bearing seats are installed at one end of the swing rod shaft, and a detection device (a photoelectric switch or a proximity switch) is installed on the support. On the basis of an angle encoder and a braking device on a swing rod shaft in an original impact device, a low-cost photoelectric switch or a proximity switch is used for replacing the angle encoder so as to realize fixed angle position monitoring and effective braking of the rotation angle of a swing rod.

Description

Technical Field

[0001] The utility model relates to the technical field of performance safety impact test of car whole vehicles and parts (automobile safety parts), and particularly relates to a low-cost pendulum impact automatic braking experimental device. Background Technique

[0002] At present, in the field of performance safety impact test in the early development of car whole vehicles and parts (automobile safety parts), pendulum impact devices are widely used in this field. However, in the prior art during the test, there is a problem of harmful secondary impact on the tested object after being impacted by the test, which may lead to test failure, not only causing property losses, but also posing a risk of personal injury.

[0003] To solve this problem, a previously existing patent provided an improved pendulum impact device. By adding the application of an angle encoder and a braking device, angle monitoring of the pendulum shaft and automatic braking application in the impact test device are realized, preventing the occurrence of secondary impact and improving the safety and reliability of the test. However, the cost of the angle encoder is relatively high. The utility model patent provides a low-cost pendulum impact automatic braking experimental device, which replaces the expensive angle encoder, reduces the cost, and can also realize fixed angle monitoring of the pendulum shaft and automatic braking application in the impact test device, preventing the occurrence of secondary impact and improving the safety and reliability of the test. Content of the Utility Model

[0004] The purpose of the utility model is to provide a low-cost pendulum impact automatic braking experimental device to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A low-cost pendulum impact automatic braking experimental device includes a pendulum impact device. The pendulum impact device includes a detection device, a safety brake, and a pendulum shaft. The pendulum shaft is fixedly connected to a lifting mechanism to adjust the initial height. A bearing seat is fixed on each side of the pendulum shaft to rotationally support the pendulum shaft. A pendulum assembly is fixed on the pendulum shaft, and the pendulum assembly is located between the two bearing seats. A signal generator special part with an adjustable angular position is installed at one end of the pendulum shaft and a bracket fixed on the bearing seat. The detection device is installed on the bracket. The other end of the pendulum shaft is connected to the brake disc of the safety brake through a brake disc seat. A speed induction piece is installed at the movable end of the pendulum assembly. The signal generator special part includes a clamp and a detection plate. The detection device is a photoelectric sensor or a proximity switch.

[0007] Preferably, the special parts for the signal generator, the bracket, and the safety brake are all installed on the same side, outside the bearing housing; used to monitor a rotation angle of the swing rod shaft; when it is monitored that the swing rod shaft rotates (rebounds) to this angle, a signal will be immediately sent by the photoelectric sensor or proximity switch to the programmable logic controller PLC or the industrial computer.

[0008] Preferably, the speed induction sheet and the detection device are electrically connected to the programmable logic controller PLC or the industrial computer, and the programmable logic controller PLC or the industrial computer controls the safety brake.

[0009] Preferably, the safety brake includes a brake disc and a brake caliper.

[0010] Preferably, the clamp is U-shaped, and the lower end opening of the U-shape is fixed by bolts to fix the special parts for the signal generator on the swing shaft.

[0011] Preferably, an impact plate is installed on the impact side of the swing rod shaft through bolts, and a number of mounting holes corresponding to the impact plate are provided on the swing rod shaft. A number of mounting holes are provided along the length direction of the swing rod shaft for adjusting the height of the swing rod shaft.

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

[0013] Based on the angle encoder and the braking device on the swing rod shaft in the original impact device, the present utility model uses a low-cost photoelectric switch or proximity switch to replace the angle encoder to achieve fixed-angle position monitoring and effective braking of the rotation angle of the swing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front structural schematic diagram of a low-cost swing impact automatic braking experimental device.

[0015] Figure 2 It is a reverse structural schematic diagram of a low-cost swing impact automatic braking experimental device.

[0016] Figure 3 It is a structural schematic diagram when the impact body is a football.

[0017] Figure 4 It is a structural schematic diagram when the impact body is a shopping cart.

[0018] In the figure: 1, swing rod shaft; 2, bearing housing; 3, detection device; 4, brake disc seat; 5, safety brake; 6, swing rod assembly; 7, impact body; 8, speed induction sheet; 9, bracket; 10, special parts for signal generator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 to 4 , in the embodiment of the present utility model, a low-cost pendulum impact automatic braking experimental device includes a pendulum impact device. The pendulum impact device includes a detection device 3, a safety brake 5, and a pendulum shaft 1. The pendulum shaft 1 is fixedly connected to a lifting mechanism to adjust the initial height. A bearing seat 2 is fixedly provided on each side of the pendulum shaft 1. The bearing seat 2 rotatably supports the pendulum shaft 1. A pendulum assembly 6 is fixed on the pendulum shaft 1. The pendulum assembly 6 is located between the two bearing seats 2. A signal generator special part 10 with an adjustable angular position and a bracket 9 fixed on the bearing seat 2 are installed at one end of the pendulum shaft 1. The detection device 3 is installed on the bracket 9. The detection device 3 is a photoelectric sensor or a proximity switch. The signal generator special part 10, the bracket 9, and the safety brake 5 are all installed on the same side, outside the bearing seat 2, for monitoring a rotation angle of the pendulum shaft 1. When it is monitored that the pendulum shaft 1 rotates (rebounds) to this angle, a signal will be immediately sent by the photoelectric sensor or the proximity switch to the programmable logic controller PLC or the industrial computer.

[0021] The other end of the pendulum shaft 1 is connected to the brake disc of the safety brake 5 through a brake disc seat 4. A speed induction piece 8 is installed at the movable end of the pendulum assembly 6. The safety brake 5 includes a brake disc and a brake caliper. The safety brake 5 can implement braking in case of sudden power failure and can implement braking after receiving instructions from the programmable logic controller PLC or the industrial computer. The signal generator special part 10 includes a clamp and a detection plate. The clamp is U-shaped, and the lower opening of the U-shaped is fixed by bolts to fix the signal generator special part 10 on the swing shaft 1. An impact plate is installed on the impact side of the pendulum shaft 1 through bolts. A number of mounting holes are provided on the pendulum shaft 1 corresponding to the impact plate. The mounting holes are provided along the length direction of the pendulum shaft 1 for adjusting the height of the pendulum shaft 1. The speed induction piece 8 and the detection device 3 are electrically connected to the programmable logic controller PLC or the industrial computer, and the programmable logic controller PLC or the industrial computer controls the safety brake 5.

[0022] Based on an angle encoder and a safety brake 5 on the pendulum rod shaft 1 of the original pendulum rod impact device, the original angle encoder is changed into a special part 10 of a signal generator with an adjustable angular position and a photoelectric sensor or proximity switch on a bracket 9 fixed to the bearing block 2, so as to realize the monitoring of the fixed angle of the pendulum rod shaft 1 and effective braking. The detection device 3 (photoelectric sensor or proximity switch) monitors by sensing the gap or bump at the fixed angle of the pendulum rod shaft and sending an acceptable electrical signal to the programmable logic controller PLC or industrial computer. At the same time, a safety brake 5 is installed on the same side or the other side of the pendulum rod shaft 1. The safety brake 5 includes a brake disc and a brake caliper.

[0023] The working principle of the present utility model is as follows: In the performance safety impact test, when the pendulum rod assembly 6 is lifted by a lifting mechanism (there are various lifting methods here to rotate to the target angle for the test; the impact body 7 installed at the bottom of the pendulum rod assembly 6 (such as a simulated football, a simulated shopping cart, and a counterweight) is lifted to a high position of the pendulum rod assembly 6 at this angle to store the energy required for the test. When the pendulum rod assembly 6 is released from a high position and completes the impact on the test object, when the pendulum rod shaft 1 rotates to a fixed angle, once the first effective impact is completed, when the programmable logic controller PLC or industrial computer receives the fixed angle signal of the detection device 3, according to the control software algorithm written in it by design, it will send an instruction to brake to the safety brake 5, and the safety brake 5 can quickly respond and lock the brake disc, realizing the immediate braking of the pendulum rod assembly 6, avoiding the occurrence of harmful secondary impacts, and ensuring the safety and accuracy of the test. The safety brake 5 will perform automatic braking without manual operation. Thus, the pendulum rod assembly 6 stops rotating immediately, preventing the occurrence of secondary impact on the test object.

[0024] Conclusion: The present utility model provides a low-cost pendulum impact automatic braking experimental device, realizing the monitoring of the fixed angle of the pendulum rod shaft 1 and the application of automatic braking in the impact test device.

[0025] The replacement of the angle encoder by the special part 10 of the signal generator and the detection device 3 in the present utility model is innovative and practical.

[0026] An angle encoder is changed to a special part 10 of a signal generator with an adjustable angular position, which is fixed on the pendulum rod shaft 1 and rotates synchronously with it; in addition, a photoelectric sensor or proximity switch is installed on the same side through a bracket 9 fixed to the bearing block 2; the safety brake 5 adopts the existing structure.

[0027] Figure 2 The simulated impact body 7 in Figure 3The simulated impact body 7 therein is a supermarket shopping cart; the purpose of this performance test is to simulate a performance test in which the airbag of a car door cannot be accidentally detonated after the installation part of the airbag is accidentally impacted by a football.

[0028] As described above, only the preferred specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A low-cost swing arm impact automatic brake test device, comprising a swing arm impact device, the swing arm impact device comprising a detection device (3), a safety brake (5) and a swing arm shaft (1), the swing arm shaft (1) being fixedly connected to a lifting mechanism, characterized in that: A bearing seat (2) is fixed on each side of the swing arm shaft (1), and the bearing seat (2) rotatably supports the swing arm shaft (1). A swing arm assembly (6) is fixed on the swing arm shaft (1), and the swing arm assembly (6) is located between the two bearing seats (2). A signal generator special part (10) with an adjustable angle position and a bracket (9) fixed on the bearing seat (2) are installed at one end of the swing arm shaft (1), and a detection device (3) is installed on the bracket (9). The swing arm shaft (1) is connected to a brake disc of a safety brake (5) through a brake disc seat (4). A speed sensing sheet (8) is installed at the movable end of the swing arm assembly (6). The signal generator special part (10) is connected to the swing arm shaft (1), and the detection device (3) is a photoelectric sensor or a proximity switch.

2. A low-cost swing arm impact automatic brake test device according to claim 1, characterized in that: The connection method between the signal generator dedicated part (10) and the rocker shaft (1) includes but is not limited to a clamp connection.

3. A low-cost swing arm impact automatic brake test device according to claim 1, characterized in that: The safety brake (5) is located on the same side or the other side of the signal generator dedicated part (10) and the bracket (9).

4. A low-cost swing arm impact automatic brake test device according to claim 1, characterized in that: The safety brake (5) comprises a brake disc and a brake caliper.

5. The low-cost swing arm impact automatic brake test device according to claim 1 is characterized in that: The signal generator dedicated part (10) and the detection device (3) mounted on the bracket (9) are connected to a programmable controller PLC or an industrial computer via an electrical signal line, and the programmable controller PLC or the industrial computer controls the safety brake (5).

6. A low-cost swing arm impact automatic brake test device according to claim 5, characterized in that: The signal generator dedicated part (10) and the detection device (3) mounted on the bracket (9) are used to monitor a fixed rotation angle of the swing arm shaft (1); when the swing arm shaft is detected to rotate to this angle, the detection device (3) will immediately send a signal to the programmable controller PLC or industrial computer.

7. A low-cost swing arm impact automatic brake test device according to claim 5, characterized in that: After receiving the signal from the detection device (3), the programmable controller PLC or industrial computer sends a braking instruction to the safety brake (5) according to the control software algorithm designed and installed therein, and the safety brake (5) will automatically brake.

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