Electromagnetic shock absorber test bed

Abstract

The utility model belongs to the technical field of shock absorber detection equipment, and particularly relates to an electromagnetic shock absorber test bed, which comprises a bottom plate, a guide post, a lifting locking cross beam, a second driving cylinder, an electromagnetic driving mechanism, a static load supporting mechanism and a cooling structure, the height of the lifting locking cross beam is adjusted through the second driving cylinder, locking is carried out through driving of the first driving cylinder, and adaptive installation of the to-be-tested shock absorber is ensured; the electromagnetic driving mechanism drives the coil connecting piece and the actuating rod to apply accurate pressure to the shock absorber by controlling the magnitude and the direction of the current of the motor coil, so that the high-precision test of the performance of the shock absorber is realized; the static load supporting mechanism is composed of an air tank and an air spring and provides constant supporting force for the shock absorber, and the stability and accuracy of a test result are effectively improved. The cooling structure achieves heat dissipation through the multi-layer design of an air conditioner, a connecting plate, an external baffle and an air guide plate, and the electromagnetic driving mechanism is prevented from being overheated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of shock absorber detection equipment, and specifically relates to an electromagnetic shock absorber test bench. BACKGROUND

[0002] With the rapid development of the automobile industry and engineering machinery, the stability and ride comfort of vehicles have gradually become the core demand of users, and the performance of shock absorbers, as an important part of the suspension system, directly affects the safety and driving experience of vehicles. Therefore, the market has higher requirements for high-performance and high-precision shock absorber test benches, not only do the test benches need to adapt to complex test environments, but also do the test results need to have high accuracy and reliability.

[0003] At present, in the field of vehicle shock absorber testing, the commonly used test benches are mainly based on electro-hydraulic servo actuators. This hydraulic actuator can convert hydraulic energy into mechanical energy, accurately control the speed, direction, displacement and force of the load according to the feedback of the displacement sensor or the travel switch, and has the advantages of fast response speed, large load stiffness and strong control power. However, the electro-hydraulic servo actuator has the problems of large energy loss, complex equipment, large floor area, and needs frequent maintenance of the hydraulic system, and the hidden danger of hydraulic oil leakage further increases the operation cost and risk.

[0004] In the scene where the high response test demand is not high, some test benches use electric actuators. This system drives the eccentric wheel through the servo motor to realize linear motion, avoiding the complexity and leakage risk of the traditional hydraulic system. However, due to the limitation of the eccentric wheel structure, the electric actuator performs poorly in high-frequency test applications, and its test range is limited to the preset standard stroke. The wear and tear of mechanical transmission components and the need for regular maintenance also limit the reliability of long-term use.

[0005] Based on the limitations of the prior art, the shock absorber test bench still has room for improvement in driving flexibility, detection accuracy and system reliability. In addition, under high-frequency operation, the heat dissipation problem of the driving system also needs to be solved. If the equipment cannot effectively dissipate heat, high temperature will affect the working efficiency of the electromagnetic driving device, and even shorten its service life. UTILITY MODEL CONTENTS

[0006] In view of the problems in the prior art, the utility model aims to provide an electromagnetic shock absorber test bench, which can realize, and solve the problems of insufficient detection accuracy, high system complexity and poor heat dissipation effect in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] An electromagnetic shock absorber test bench, comprising a base plate, the upper end of the base plate is symmetrically fixedly connected with a guide column, a lifting locking cross beam is sleeved on the guide column, and second driving cylinders for adjusting the height of the lifting locking cross beam are arranged at the two ends of the lifting locking cross beam;

[0009] A top plate is sleeved on the guide column, a protection window is arranged at the top of the top plate, and a driving bin is arranged at the bottom of the top plate;

[0010] The bottom of the top plate is provided with an electromagnetic driving mechanism and a static load supporting mechanism, and the static load supporting mechanism is symmetrically distributed on the two sides of the electromagnetic driving mechanism.

[0011] Further, the lifting locking cross beam comprises a cross beam sleeved on the guide column at the two ends respectively;

[0012] The side surface of the cross beam is connected with a base, and the two sides of the base are connected with first driving cylinders;

[0013] The telescopic end of the first driving cylinder is connected with a locking arm.

[0014] Further, the electromagnetic driving mechanism comprises a coil connecting piece, the top of the coil connecting piece is connected with an action rod, and motor coils are symmetrically arranged on the two sides of the coil connecting piece, and the motor coils are composed of a plurality of motor coil units in parallel.

[0015] Further, the other two side surfaces of the coil connecting piece are connected with guide rails;

[0016] One side of the motor coil is connected with a grating ruler.

[0017] Further, a force sensor is mounted below the cross beam, the force sensor is fastened and connected through a pre-tightening piece, and the axis line of the pre-tightening piece and the action rod is on the same straight line;

[0018] When the shock absorber is tested, the two ends of the shock absorber are connected to the force sensor and the action rod through the upper clamp and the lower clamp respectively.

[0019] Further, the static load supporting mechanism comprises an air tank, the top of the air tank is provided with an air spring, and the air tank and the air spring are communicated with each other, one end of the air spring is connected with a connecting head, and the connecting head is connected with the coil connecting piece.

[0020] Further, an air conditioner is arranged at the back of the driving bin;

[0021] The connecting plate, the outer baffle and the air deflector are sequentially arranged from the outside to the inside between the air conditioner and the driving bin;

[0022] The side surface of the connecting plate is provided with an air outlet and an air return opening;

[0023] The cold air of the air conditioner enters from the air outlet, passes through the channel formed between the outer baffle and the air deflector, and is finally discharged from the air return outlet.

[0024] Compared with the prior art, the utility model has the beneficial effects that:

[0025] The utility model discloses a combination of bottom plate, guide column, lifting locking crossbeam and second drive cylinder, guarantees that shock absorber can be positioned and locked accurately in the testing process.The height of lifting locking crossbeam can be accurately controlled by second drive cylinder, makes it adapt to the shock absorber installation demand of different height.This structure avoids the problem of complex structure, frequent maintenance in traditional electro-hydraulic servo or mechanical system, can realize the convenience and flexibility of equipment operation, satisfies the demand of high performance and high precision in the field of vehicle shock absorber testing.

[0026] The setting of electromagnetic drive mechanism realizes the efficient and controllable pressure impact on shock absorber.Through the current size and direction control of motor coil, the coil connecting piece and action lever can realize the accurate control to shock absorber, simulate the stress condition under real working condition.This design solves the problems such as large energy loss and hydraulic leakage risk in traditional electro-hydraulic servo system, overcomes the defects of poor performance of electric action driver in high frequency test application, significantly improves the control precision and response speed of test bench.

[0027] The utility model discloses a static load support mechanism, which provides constant support force for the shock absorber to be tested through the air tank and air spring.

[0028] In order to solve the high temperature problem of electromagnetic drive mechanism in long time operation, the utility model sets up the special cooling structure.The heat in the drive bin can be efficiently taken away through the multilayer combination of air conditioner, connecting plate, outer baffle and air deflector, preventing the performance of equipment from being affected by overheating.The cold air enters from the air outlet, flows through the channel and is discharged from the air return outlet, ensuring that the electromagnetic drive mechanism works at stable temperature and prolongs the service life of the equipment.This heat dissipation scheme overcomes the problem of reduced working efficiency caused by high temperature in traditional system, ensuring the safety and stability of test bench in long time continuous work. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic view of the utility model;

[0030] Figure 2 It is a structural schematic view of the utility model without drive bin;

[0031] Figure 3 It is a split structural schematic view of the utility model;

[0032] Figure 4 It is a structural schematic view of the lifting locking crossbeam of the utility model;

[0033] Figure 5 It is a structural schematic view of the electromagnetic driving mechanism of the utility model;

[0034] Figure 6 It is a structural schematic view of the air conditioner of the utility model;

[0035] Figure 7 It is a split structural schematic view of the air conditioner of the utility model.

[0036] In the drawing, the component list represented by each sign is as follows:

[0037] 1, bottom plate;

[0038] 2, guide column;

[0039] 3, lifting locking cross beam; 31, cross beam; 311, base; 32, pre-tightening piece; 33, first driving cylinder; 34, locking arm;

[0040] 4, second driving cylinder;

[0041] 5, top plate;

[0042] 6, electromagnetic driving mechanism; 61, coil connecting piece; 62, motor coil; 63, guide rail; 64, grating ruler; 65, action rod;

[0043] 7, static load support mechanism; 71, gas tank; 711, air spring; 72, connecting head;

[0044] 8, protective window;

[0045] 9, air conditioner; 91, connecting plate; 911, air outlet; 912, air return; 92, external baffle; 93, air deflector; 10, driving bin. DETAILED DESCRIPTION

[0046] In order to make the purpose and the advantage of the utility model more clear and obvious, the utility model is specifically explained below in combination with examples. It should be understood that the following text is only used to describe one or several specific implementation manners of the utility model, and does not strictly limit the protection scope of the utility model specifically requested.

[0047] Reference is made to Figures 1-7An electromagnetic vibration damper test bench includes a base plate 1. Two guide columns 2 are symmetrically and fixedly connected to the upper end of the base plate 1, and the guide columns 2 play a guiding and supporting role in the test bench structure. A lifting and locking crossbeam 3 is sleeved on the upper part of the guide columns 2. The lifting and locking crossbeam 3 can move up and down along the axis of the guide columns 2, thereby realizing the adjustment of the installation height of the vibration damper. A second drive cylinder 4 is installed at both ends of the lifting and locking crossbeam 3. The second drive cylinder 4 is used to precisely control the height and position of the lifting and locking crossbeam 3 to ensure that the vibration damper under test is at a suitable test height. A top plate 5 is also installed on the base plate 1. A protective window 8 is set on the top of the top plate 5 to protect the test area and ensure safety. A drive chamber 10 is set at the bottom of the top plate 5. The drive chamber 10 is used to contain the heat generated during the test and dissipate it through a cooling system. An electromagnetic drive mechanism 6 and a static load support mechanism 7 are further installed at the bottom of the top plate 5. The static load support mechanism 7 is symmetrically distributed on both sides of the electromagnetic drive mechanism 6 to ensure that the vibration damper is subjected to uniform and stable force during the test.

[0048] See Figure 4 The lifting and locking crossbeam 3 includes a crossbeam 31 with both ends respectively sleeved on the guide post 2; a base 311 is fixedly connected to the side of the crossbeam 31, which serves as the mounting base for the first drive cylinder 33 and provides reliable support for the first drive cylinder 33; the first drive cylinder 33 is connected to both sides of the base 311, and the first drive cylinder 33 is the actuator for driving the locking arm 34, controlling the rotation of the locking arm 34 through its extension and retraction; the extension and retraction end of the first drive cylinder 33 is connected to the locking arm 34, which rotates under the drive of the first drive cylinder 33 and locks both ends of the crossbeam 31 on the guide post 2 during its rotation to ensure the stability of the crossbeam 31 during the test.

[0049] See Figure 5 The electromagnetic drive mechanism 6 consists of a coil connector 61, a motor coil 62, and an actuating rod 65. The coil connector 61 is an important component connecting the motor coil 62 and the actuating rod 65, transmitting the electromagnetic drive motion to the actuating rod 65 through the connector. The actuating rod 65 is fixedly connected to the top of the coil connector 61. During the test, the actuating rod 65 is used to directly act on the damper under test, thereby applying pressure and impact force. The motor coil 62 is symmetrically installed on both sides of the coil connector 61. The motor coil 62 is composed of multiple motor coil units connected in parallel. The motor coil 62 controls the magnitude and direction of the current, thereby driving the movement of the coil connector 61 and the actuating rod 65, achieving precise pressure application to the damper.

[0050] See Figure 5Two sides of the coil connecting piece 61 are connected with guide rails 63, the guide rails 63 are used for providing movement guidance of the coil connecting piece 61, so as to ensure stability and accuracy in the movement process; one side of the motor coil 62 is provided with a grating ruler 64, the grating ruler 64 is used as a displacement measuring device, the displacement of the coil connecting piece 61 is detected in real time, and a signal is fed back to a main control system, so that precise control of the electromagnetic driving mechanism 6 is realized.

[0051] Referring to Figures 4-5 The lower end of the cross beam 31 is fixedly connected with a pre-tightening piece 32, the pre-tightening piece 32 is designed to keep the axis of the action rod 65 in a same straight line, so as to ensure symmetrical force application; when the shock absorber is tested, the two ends of the tested shock absorber are fixedly connected to the force sensor and the action rod 65 through the upper clamp and the lower clamp respectively, so that the shock absorber can bear the pressure impact of the action rod 65 in the testing process, thereby effectively simulating the stress condition under the real working condition.

[0052] Referring to Figure 3 The static load supporting mechanism 7 comprises an air tank 71 and an air spring 711; the air tank 71 provides the air spring 711 with an air source and keeps the air tank 71 and the air spring 711 communicated with each other, the air tank 71 keeps the tested shock absorber with constant supporting force by adjusting the air pressure of the air spring 711, so as to ensure that the shock absorber is uniformly stressed in the testing process; one end of the air spring 711 is connected with a connecting head 72, the connecting head 72 is fixedly connected to the coil connecting piece 61, the static load supporting mechanism 7 is connected with the electromagnetic driving mechanism 6 through the connecting head 72, so that the air spring 711 can provide stable support for the tested shock absorber.

[0053] Referring to Figure 7 The back of the driving bin 10 is provided with an air conditioner 9, the air conditioner 9 provides cooling air flow for the driving bin 10; the air conditioner 9 and the driving bin 10 are sequentially provided with a connecting plate 91, an outer baffle 92 and a wind deflector 93 from outside to inside, forming a ventilation structure to realize efficient heat dissipation; the side of the connecting plate 91 is provided with an air outlet 911 and an air return port 912, the air outlet 911 is used for sending cold air from the air conditioner 9 into the inside of the driving bin 10; the cold air is discharged from the air return port 912 through the channel between the outer baffle 92 and the wind deflector 93, thereby taking away the heat generated by the electromagnetic driving mechanism 6 during operation, avoiding the influence of high temperature on the performance of the equipment.

[0054] Embodiment 2:

[0055] The first driving cylinder 33 and the second driving cylinder 4 can be air cylinders, electric cylinders or hydraulic cylinders. Preferably, the second driving cylinder 4 is an electric cylinder, and the first driving cylinder 33 is an air cylinder.

[0056] The working principle of the utility model is:

[0057] In use, according to the height of the shock absorber to be detected, the height of the lifting locking cross beam 3 is adjusted by the second driving cylinder 4, when the height is adjusted to the appropriate height, the first driving cylinder 33 drives the locking arm 34 to rotate, with the rotation of the locking arm 34, the two ends of the cross bar 31 are locked on the guide column 2; then one end of the shock absorber to be detected is connected to one end of the action rod 65 through the lower clamp, and the other end of the shock absorber is connected to the force sensor below the lifting locking cross beam 3 through the upper clamp;

[0058] Then the internal air pressure of the air spring 711 is adjusted to make the air spring 711 provide constant support force to the shock absorber to be detected;

[0059] By controlling the size and direction of the current flowing through the motor coil 62, the movement direction and size of the coil connecting rod 61 are driven, with the movement of the coil connecting rod 61, the action rod 65 installed on the top of the coil connecting rod 61 is driven to move, when the action rod 65 moves, the shock absorber connected between the action rod 65 and the pre-tightening piece 32 is pressed and impacted, and the performance of the shock absorber is detected;

[0060] When the electromagnetic driving mechanism 6 is running, the air conditioner installed outside the air guide mechanism 9 will send cold air to the inside of the driving bin 10 through the air outlet 911, the cold air will circulate in the driving bin 10 and flow out through the air return port 912, so that the heat generated when the electromagnetic driving mechanism 6 is running can be taken away, and the high temperature of the electromagnetic driving mechanism 6 can be avoided.

[0061] The above only describes preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, if not specially described and limited, are implemented according to the conventional means in the art.

Claims

1. An electromagnetic damper test bench, characterized in that: Including the bottom plate (1), the upper end of the bottom plate (1) is fixedly connected with the guide column (2) in a symmetrical manner, the guide column (2) is sleeved with the lifting locking cross beam (3), and the two ends of the lifting locking cross beam (3) are provided with the second driving cylinder (4) for adjusting the height of the lifting locking cross beam (3); The guide column (2) is sleeved with the top plate (5), the top of the top plate (5) is provided with the protective window (8), and the bottom of the top plate (5) is provided with the driving bin (10); The bottom of the top plate (5) is provided with the electromagnetic driving mechanism (6) and the static load supporting mechanism (7), and the static load supporting mechanism (7) is symmetrically distributed on the two sides of the electromagnetic driving mechanism (6).

2. An electromagnetic damper test bench according to claim 1, characterized in that: The lifting locking cross beam (3) comprises a cross beam (31) sleeved on the guide column (2) at two ends; The side surface of the cross beam (31) is connected with the base (311), and the two sides of the base (311) are connected with the first driving cylinder (33); The telescopic end of the first driving cylinder (33) is connected with the locking arm (34).

3. An electromagnetic damper test bench according to claim 2, characterized in that: The electromagnetic driving mechanism (6) comprises a coil connecting piece (61), the top of the coil connecting piece (61) is connected with the action rod (65), and the two sides of the coil connecting piece (61) are symmetrically provided with motor coils (62), and the motor coils (62) are composed of a plurality of motor coil units in parallel connection.

4. An electromagnetic damper test bench according to claim 3, characterized in that: The other two side surfaces of the coil connecting piece (61) are connected with guide rails (63); One side of the motor coil (62) is connected with the grating ruler (64).

5. An electromagnetic damper test bench according to claim 3, characterized in that: A force sensor is installed below the cross beam (31), the force sensor is tightly connected through the setting of the pre-tightening piece (32), the axis line of the pre-tightening piece (32) and the action rod (65) are in the same straight line; When the shock absorber is tested, the two ends of the shock absorber are connected to the force sensor and the action rod (65) through the upper clamp and the lower clamp respectively.

6. An electromagnetic damper test bench according to claim 1, characterized in that: The static load supporting mechanism (7) comprises an air tank (71), the top of the air tank (71) is provided with an air spring (711), and the air tank (71) and the air spring (711) are communicated with each other, one end of the air spring (711) is connected with a connecting head (72), and the connecting head (72) is connected with the coil connecting piece (61).

7. The electromagnetic damper test bench of claim 1, wherein: The back of the driving bin (10) is provided with an air conditioner (9); The air conditioner (9) and the driving bin (10) are sequentially provided with a connecting plate (91), an outer baffle (92) and a guide vane (93) from outside to inside; The side surface of the connecting plate (91) is provided with an air outlet (911) and an air return port (912) penetratingly formed; The cold air of the air conditioner (9) enters from the air outlet (911) and passes through the channel formed between the outer baffle (92) and the guide vane (93), and is finally discharged from the air return port (912).

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