Coil spring performance and fatigue test device

Abstract

The utility model discloses a coil spring performance and fatigue test device, and belongs to the technical field of cable drums of new energy engineering machinery vehicles. A bottom supporting seat is fixed in the middle of the support. And the servo motor and a driving core shaft of the planetary reducer penetrate through the bracket and the back plate. A coil spring fixing rod fixed on the front surface of the back plate fixes a coil spring outer ring. And the servo motor and the planetary reducer are supported on the bottom supporting seat. The driving mandrel penetrates through the back plate and is fixed to the inner ring of the coil spring, and counting is detected through the turn number counting proximity switch, the rotating speed counting proximity switch and the torque sensor. And the positions of the coil spring limiting rod and the coil spring fixing rod between the back plate and the transparent plate baffle are adjustable. A torque wrench can be arranged at the front end of the driving mandrel. The device can accurately detect the performance parameters of the coil spring, test the effective coil number of the coil spring and carry out fatigue test on the attenuation condition of the curling torque within the effective coil number range, meanwhile, the total winding and unwinding coil number and the rotating speed are recorded, the performance and the fatigue life of a winding drum can be tested, and the remaining service life of the coil spring can be estimated through test data.

Description

Technical Field

[0001] This utility model belongs to the technical field of cable reels for new energy engineering machinery vehicles, and specifically relates to a spring reel spring performance and fatigue testing device, which can be used for spring reel spring performance and fatigue testing. Background Technology

[0002] One type of new energy construction machinery vehicle uses a cable reel for power supply. This reel is a spring-type reel integrated into the construction machinery vehicle. The vehicle's movement and cable winding and unwinding are driven by the coil spring inside the reel. Therefore, the performance and quality of the coil spring inside the reel determine the reliability and stability of the entire spring reel product. In the past, the coil spring inside the reel was treated as a wear part and was replaced when its performance could not meet the requirements. Some were replaced after six months of use, and some after one year. The fatigue life of the coil spring was basically unknown, and it could not be detected and prevented in advance. Currently, domestic coil spring manufacturers lack relevant service life or coil force attenuation parameters. Utility Model Content

[0003] The purpose of this invention is to provide a device for testing the performance and fatigue of coil springs. This device can accurately detect the performance and torque fatigue attenuation of coil springs.

[0004] The technical solution adopted is:

[0005] A coil spring performance and fatigue testing device includes a coil spring mounting unit, a drive and torque testing unit, and a support and detection unit.

[0006] The coil spring mounting unit includes a bearing support, a drive spindle, and a coil spring fixing rod.

[0007] The bottom of the bracket is fixed to the frame.

[0008] A backplate is fixed to the bracket.

[0009] The drive spindles of the servo motor and planetary gear reducer pass through the bracket and back plate.

[0010] A coil spring fixing rod is fixed to the front surface of the back plate.

[0011] The drive and torque testing unit includes a servo motor, planetary gearbox, and torque sensor.

[0012] A Z-shaped support plate is fixed on the bottom support base.

[0013] One side of the support plate is fixed to the bottom support.

[0014] The housings of the servo motor and planetary reducer are fixed in the middle of the support plate.

[0015] The support and detection unit includes a bearing support, a bottom support, a revolution counting proximity switch, and a speed counting proximity switch.

[0016] A bottom support is fixed in the middle of the bracket.

[0017] The drive spindle is supported on the bottom support via a bearing support.

[0018] On the other side of the support plate, a rotation count proximity switch and a speed count proximity switch are arranged.

[0019] A torque sensor is installed at the output end of the servo motor and planetary reducer.

[0020] The positions of the coil spring limiting rod and coil spring fixing rod between the back plate and the transparent plate baffle are adjustable according to the different specifications of the coil spring.

[0021] The torque value of the torque wrench calibration device and the performance of the coil spring can be set at the front end of the drive spindle.

[0022] Its advantages are:

[0023] This device can accurately detect the performance parameters of coil springs, test the effective number of coils and the fatigue test of coiling torque decay within the effective number of coils, and record the total number of coils and rotation speed. It can test the performance and fatigue life of the coil drum. The test data can be used to estimate the remaining service life of the coil spring, allowing for early replacement and prevention. This reduces the risk of cable slippage, vehicle crushing, and electric shock caused by coil spring failure. It also facilitates the selection of the best coil spring supplier through testing, and determines the product's service life based on the test results. It also allows for early prevention of coil spring force decay, reducing potential safety hazards in product use. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention from a frontal perspective.

[0025] Figure 2 This is a three-dimensional structural diagram of the present invention from a rear view.

[0026] Figure 3 for Figure 1 A magnified view of part A in the image.

[0027] Figure 4 This is the front view of the present invention.

[0028] Figure 5 This is a side view of the present invention.

[0029] 1. Control panel; 2. Welding frame; 3. Torque wrench; 4. Alarm light; 5. Servo motor and planetary reducer; 6. Bearing support seat; 7. Transparent baffle; 8. Test coil spring; 9. Coil spring fixing rod; 10. Counting coil proximity switch; 11. Speed ​​counting proximity switch; 12. Torque sensor; 13. Coil spring limit rod rear hole; 14. Bottom support seat; 15. Drive spindle; 16. Bracket; 17. Support plate; 18. Back plate; 19. Limit rod; 20. Coil spring fixing rod rear hole. Detailed Implementation

[0030] A coil spring performance and fatigue testing device includes a cabinet unit (including an operation panel 1), a coil spring mounting unit (including a drive spindle 15), a drive and torque testing unit (including a torque wrench 3), and a support and detection unit (including an alarm light 4).

[0031] The cabinet unit includes a welded frame 2, an operation panel 1, and electrical components. The operation panel 1 is equipped with switches, a speed display module, a revolution count module, a torque display module, and a motor speed controller.

[0032] The coil spring mounting unit includes a drive spindle 15, a coil spring fixing rod 9, and a transparent baffle 7.

[0033] The bottom of the vertically arranged bracket 16 is fixed to the frame 2.

[0034] A vertically arranged circular back plate 18 is fixed on the bracket 16.

[0035] After the drive spindle 15 passes through the hole in the bracket 16 and the center hole in the back plate 18, the drive spindle 15 is fixedly connected to the inner hole of the test coil spring 8.

[0036] A multi-turn spring fixing rod rear hole 20 is opened on the circumference of the back plate 18, and a multi-turn spring fixing rod front hole is opened on the circumference of the transparent plate baffle 7.

[0037] The rear hole 20 of the coil spring fixing rod corresponds to the position of the front hole of the coil spring fixing rod.

[0038] A coil spring fixing rod 9 is provided between the back plate 18 and the transparent plate baffle 7, and its positioning is selected according to the specifications of the test coil spring 8.

[0039] The coil spring fixing rod 9 is fixed to the outer hole of the test coil spring 8.

[0040] A bushing can be installed in the inner and outer holes of the test coil spring 8.

[0041] A circular transparent baffle 7 (made of transparent plexiglass) is provided in front of the back plate 18, through which the state of the coil spring during retraction and extension can be directly observed.

[0042] A multi-turn spring-limiting rod rear hole 13 is opened on the circumference of the back plate 18, and a multi-turn spring-limiting rod front hole is opened on the circumference of the transparent plate baffle 7. The spring-limiting rod rear hole 13 and the spring-limiting rod front hole are positioned correspondingly.

[0043] Multiple limiting rods 19 are set between the back plate 18 and the transparent plate baffle 7, and are positioned according to the specifications of the test coil spring 8, thus restricting the outer ring of the test coil spring 8 on the outside.

[0044] Both the coil spring fixing rod 9 and the limiting rod 19 can be screw rods, which facilitates disassembly and replacement of different test coil springs 8.

[0045] The coil spring mounting unit is designed to accommodate coil springs of different specifications, allowing for easy disassembly and adjustable clamping.

[0046] The drive and torque testing unit includes a servo motor and planetary reducer 5, a torque sensor 12, and a torque wrench 3.

[0047] A Z-shaped support plate 17 is fixed on the bottom support seat 14.

[0048] One of the horizontal plates of the support plate 17 is fixed to the upper surface of the bottom support seat 14.

[0049] The output shaft of the servo motor is directly connected to the input shaft of the planetary reducer.

[0050] The housings of the servo motor and planetary reducer 5 are fixed on the vertical plate of the support plate 17.

[0051] The drive spindle 15 output by the servo motor and planetary reducer 5 is set horizontally.

[0052] The support and detection unit includes a bearing support seat 6, a bottom support seat 14, a rotation count proximity switch 10, a speed count proximity switch 11, and an alarm 4.

[0053] The bracket 16 has a horizontally fixed bottom support 14 in the middle.

[0054] The drive spindle 15 is supported on the bottom support 14 by two bearing support seats 6 and a self-lubricating bushing.

[0055] Another horizontal plate at the front end of the support plate 17 is equipped with a revolution counting proximity switch 10 and a speed counting proximity switch 11.

[0056] The fatigue test of the test coil spring 8 is carried out by setting the servo motor frequency converter. The drive spindle 15 rotates to drive the inner ring of the test coil spring 8 to retract and expand, and the number of rotations and speed are controlled.

[0057] The torque sensor 12 displays the torque value of the test coil spring 8 in real time to monitor the torque decay.

[0058] After power failure, torque wrench 3 can be used to test the basic performance of coil spring 8 installed at the front end of drive spindle 15. It can be used to manually check the basic number of coils and rated torque value. Alarm light 4 (three-color alarm light) can also be set to alarm when the set speed, torque and number of coils are exceeded. The number of coils and speed are calculated by two proximity switches and related electrical modules. Over-coil or over-torque alarm is set by counting and torque relay, and the machine is stopped in time for inspection.

Claims

1. A coil spring performance and fatigue testing device, comprising a coil spring mounting unit, a driving and torque testing unit, and a support and detection unit; characterized in that: The coil spring mounting unit includes a bearing support (6), a drive spindle (15), and a coil spring fixing rod (9); The bottom of the bracket (16) is fixed to the frame (2); A backplate (18) is fixed on the bracket (16); The drive spindle (15) of the servo motor and planetary reducer (5) passes through the bracket (16) and the back plate (18); A coil spring fixing rod (9) is fixed to the front surface of the back plate (18); The drive and torque testing unit includes a servo motor and planetary reducer (5) and a torque sensor (12); A Z-shaped support plate (17) is fixed on the bottom support seat (14); One side of the support plate (17) is fixed to the bottom support seat (14); The housing of the servo motor and planetary reducer (5) is fixed in the middle of the support plate (17); The support and detection unit includes a bearing support seat (6), a bottom support seat (14), a rotation count proximity switch (10), and a speed count proximity switch (11); A bottom support seat (14) is fixed in the middle of the bracket (16); The drive spindle (15) is supported on the bottom support (14) by the bearing support (6); On the other side of the support plate (17), a rotation count proximity switch (10) and a speed count proximity switch (11) are arranged.

2. The coil spring performance and fatigue testing device according to claim 1, characterized in that: A torque sensor (12) is installed on the servo motor and planetary reducer (5).

3. The coil spring performance and fatigue testing device according to claim 1, characterized in that: A transparent baffle (7) is provided in front of the back panel (18), and the front end of the coil spring fixing rod (9) is fixed on the transparent baffle (7); A multi-turn spring limiting rod rear hole (13) is opened on the circumference of the back plate (18), and a multi-turn spring limiting rod front hole is opened on the circumference of the transparent plate baffle (7). A limiting rod (19) is provided between the rear hole (13) of the coil spring limiting rod and the front hole of the coil spring limiting rod.

4. The coil spring performance and fatigue testing device according to claim 3, characterized in that: A multi-turn spring fixing rod rear hole (20) is opened on the circumference of the back plate (18), and a multi-turn spring fixing rod front hole is opened on the circumference of the transparent plate baffle (7). The spring fixing rod rear hole (20) and the spring fixing rod front hole are used for setting the spring fixing rod (9) in different positions.

5. The coil spring performance and fatigue testing device according to claim 1, characterized in that: It also includes a torque wrench (3) for setting at the front end of the drive spindle (15).

6. The coil spring performance and fatigue testing device according to claim 1, characterized in that: A self-lubricating bushing is provided between the bearing support (6) and the drive spindle (15).

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