A flexible shaft oscillation test device and method

Abstract

This application provides a flexible shaft oscillation testing device, comprising: a mounting bracket; a slide rod bracket disposed on the mounting bracket; a slide rod disposed on the slide rod bracket; a slider disposed on the slide rod, wherein the slider is capable of sliding along the slide rod; a bearing connecting rod rotatably connected to the slider; a swing arm, one end of which is connected to the bearing connecting rod; the other end of which is used to connect to the flexible shaft; and this application also provides a flexible shaft oscillation testing method. The device provided by this invention is simple in structure, reliable in use, has a controllable swing arm radius, and measurable swing arm angle, effectively realizing the ability to detect variable swing radius and swing angle in real time during flexible shaft testing, and is applicable to flexible shaft life test benches and test benches with oscillation testing requirements for similar swing angle and radius tests.

Description

Technical Field

[0001] This application belongs to the field of product testing technology, and in particular relates to a flexible shaft oscillation testing device and method. Background Technology

[0002] Current flexible shaft testing methods only use a fixed axial reciprocating value, while the actual operating conditions of pilots pushing and pulling the control stick involve changes in angle and swing length. The axial reciprocating fixed value method cannot accurately measure the data of the flexible shaft under real-world operating conditions. Summary of the Invention

[0003] To address the aforementioned technical problems, in a first aspect, this application provides a flexible shaft oscillation testing device, the testing device comprising:

[0004] Mounting bracket;

[0005] A slide bar bracket is mounted on the mounting bracket;

[0006] A slide bar is mounted on the slide bar bracket;

[0007] A slider is disposed on the slide rod, wherein the slider is capable of sliding along the slide rod;

[0008] The bearing connecting rod is rotatably connected to the slider.

[0009] A swing arm, one end of which is connected to the bearing connecting rod; the other end of which is used to connect to a flexible shaft.

[0010] Preferably, the testing apparatus further includes:

[0011] The bearing bracket is mounted on the slider;

[0012] A bearing is mounted on the bearing bracket, and the bearing is used to mount the bearing connecting rod.

[0013] Preferably, the testing apparatus further includes:

[0014] A rotary encoder includes a blind hole and a bracket, the bracket being mounted on the bearing bracket; one end of the bearing connecting rod is connected to the blind hole.

[0015] Preferably, the bearings are connected to the bearing connecting rod by means of retaining rings and retaining grooves.

[0016] Preferably, the length of the swing arm is adjusted by adjusting the connection position between the bearing connecting rod and the swing arm to achieve the adjustment of the actual swing radius.

[0017] Preferably, the testing apparatus further includes:

[0018] A flexible shaft connecting rod is connected to the other end of the swing arm, and the flexible shaft connecting rod is used to connect the flexible shaft.

[0019] Preferably, the flexible shaft connecting rod is rotatably connected to the swinging mechanism, and the mounting bracket is a square frame;

[0020] The testing apparatus also includes:

[0021] A base for mounting the square frame; wherein the square frame is movable along the base.

[0022] Secondly, this application also provides a method for testing the oscillation of a flexible shaft, the method comprising:

[0023] Adjust the swing radius corresponding to the model of the flexible shaft by adjusting the two set nuts on the swing arm;

[0024] Adjust the set screw on the slider to make the central axis of the flexible shaft connecting rod concentric with the flat flexible shaft product;

[0025] The flexible shaft product and the flexible shaft connecting rod are fixedly assembled using internal threads;

[0026] In the test state, the swing arm swings back and forth as the flexible shaft is pushed and pulled, and drives the bearing connecting rod to rotate in both directions. The rotary encoder uses the number of light spots counted in both directions to actually test the angle value of the back-and-forth swing of the flexible shaft.

[0027] The beneficial technical effects of this application are as follows:

[0028] This invention provides a device with a simple structure, reliable use, controllable swing arm radius, and measurable swing arm angle. It effectively realizes the ability to detect variable swing radius and swing angle in real time during flexible shaft testing and is applicable to flexible shaft life test benches and test benches with swing testing requirements for similar swing angle and radius tests. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a flexible shaft swing device provided in an embodiment of this application;

[0030] Figure 2 A front view of a flexible shaft swing device provided in an embodiment of this application;

[0031] The components are: 1-mounting bracket, 2-slide rod, 3-swing arm, 4-slider, 5-bearing bracket, 6-bearing connecting rod, 7-bearing, 8-rotary encoder, 9-set nut, 10-slide rod bracket, 11-flexible shaft connecting rod. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-2The present application will be described in detail with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0033] This application provides a novel swing device that meets the requirements of a flexible shaft test, providing a stable, controllable cantilever length, and high precision swing device.

[0034] In this embodiment, two slide rods 2 are fixed to the mounting bracket 1 by four slide rod brackets 10, two sliders 4 are fixed to the two slide rods 2 by set screws, a bearing bracket 5 is fixed to the sliders 4 by screws, a bearing 7 is installed on the bearing bracket 5, a bearing connecting rod 6 is connected between the two bearings by a retaining ring and a retaining groove, a rotary encoder 8 is installed at one end of the bearing bracket 5 by screws and the bearing connecting rod 6 is fixed by set screws, a swing arm 3 and a bearing connecting rod are fixed by two set nuts 9, and the swing arm 3 and the flexible shaft connecting rod 6 are connected by a retaining pin with a retaining groove and a buckle for transmission.

[0035] The slide bar 2 is fixed to the mounting bracket 1 by screws and nuts. The slider 4 is fastened to the slide bar 3 by set screws. The bearing 7 is fixed to the bearing bracket 5 by an interference fit. The bearing connecting rod 6 is fixed and limited to the bearing 7 by a snap and a slot. The bearing connecting rod 6 has an internal thread interface at the center point of the two bearings, and an extension section is provided at the rear end of the bearing connecting rod 6. The extension section of the bearing connecting rod 6 is fastened to the rotary encoder 8 by a set screw and is mounted on the bearing bracket 5 by screws.

[0036] The length of the swing arm 3 is adjusted by adjusting the connection position between the bearing connecting rod 6 and the swing arm 3 to achieve the actual swing radius, and the bearing connecting shaft 6 is fixedly connected by two set nuts 9.

[0037] It should be noted that the working principle is as follows: the actual swing radius of the swing arm 3 is adjusted by adjusting the connection position of the bearing connecting rod 6 and the swing arm 3; then the axial center line of the flexible shaft connecting rod 11 is adjusted to be concentric with the flexible shaft by tightening the set screw on the slider 4; the real-time reciprocating swing angle of the flexible shaft is tested by fastening the rotary encoder 8 to the bearing connecting shaft 6.

[0038] This invention designs a device with a simple structure, reliable use, controllable swing arm radius, and measurable swing arm angle. It effectively realizes the ability to detect variable swing radius and swing angle in real time during flexible shaft testing and is applicable to flexible shaft life test benches and test benches with swing testing requirements for similar swing angle and radius tests.

[0039] Ultimately, it can achieve the ability to test the yaw angle of the flexible shaft with high precision throughout its entire stroke, meeting the testing range of 0 to ±60° for the entire series of flexible shaft products, with a testing accuracy of ±0.01°. At the same time, the swing radius of the swing arm can be adjusted in real time to achieve the best simulation of the data under the actual push-pull operation of the flexible shaft by the pilot.

[0040] In other embodiments of this application, the following are examples: Figure 1 As shown, a swing device for testing flexible shafts comprises a mounting bracket 1 with four sliding rod brackets 10 fixing two sliding rods 2, two sliders 4 fixed on the two sliding rods 2 with set screws, a bearing bracket 5 fixed on the sliders 4 with screws, a bearing 7 installed on the bearing bracket 5, a bearing connecting rod 6 connected between the two bearings by a retaining ring and a retaining groove, a rotary encoder 8 installed at one end of the bearing bracket 5 with screws and the bearing connecting rod 6 fixed with a set screw, a swing arm 3 and the bearing connecting rod 6 fixed by two set nuts 9, and a drive mechanism connecting the swing arm 3 and the flexible shaft connecting rod 11 by a retaining pin with a retaining groove and a buckle.

[0041] The slide rod 2 is fixed to the mounting bracket 1 by screws and nuts, and the lead of the slide rod 2 is referenced to the top edge of the mounting bracket 1. The slider 4 is fastened to the slide rod 3 by set screws, and the set screw value is adjusted according to the force range of the flexible shaft model. The bearing 7 is fixed to the bearing bracket 5 by an interference fit, with the interference not exceeding 0.03. The bearing connecting rod 6 is fixed and limited to the bearing 7 by a snap and a slot, and the axial movement of the bearing connecting rod is not greater than 0.5. The bearing connecting rod 6 has an internal thread interface at the center point of the two bearings, and the bearing connecting rod 6 is installed at the rear end of the bearing 7 with an extension section of 15.

[0042] Furthermore, one end of the extended section of the bearing connecting rod 6 is fastened to the rotary encoder 8 with a set screw to ensure that the coaxiality between the bearing connecting rod 6 and the rotary encoder 8 is no greater than 0.02. It is then mounted on the bearing bracket 5 with screws. The length of the swing arm 3 is adjusted by adjusting the connection position between the bearing connecting rod 6 and the swing arm 3 to achieve the actual swing radius. The length of the swing arm 3 is no less than 100 mm, and it is fixedly connected to the bearing connecting shaft 6 with two set nuts 9.

[0043] In other embodiments of this application, a flexible shaft testing swing device and its usage method are provided, the steps of which are as follows:

[0044] 1) Adjust the swing radius corresponding to the model of the flexible shaft by adjusting the two set nuts on the swing arm 3;

[0045] 2) Adjust the set screw on slider 4 to make the central axis of flexible shaft connecting rod 11 concentric with the flat flexible shaft product;

[0046] 3) Secure the flexible shaft product to the flexible shaft connecting rod 11 using internal threads;

[0047] 4) In the test state, the swing arm 3 swings back and forth with the push and pull of the flexible shaft, and drives the bearing connecting rod 6 to rotate in both directions. The rotary encoder uses the number of light spots counted in both directions to actually test the angle value of the back and forth swing of the flexible shaft.

[0048] In one feasible implementation, a swing arm 3 with a length of 60, an angle of 0-±30°, and an M12 external thread flexible shaft as an example is used.

[0049] Before installing the flexible shaft product, first confirm the simulated pilot control radius value and three-dimensional spatial layout of the flexible shaft product to deduce the height of the flexible shaft connection end. Adjust the swing radius corresponding to the model flexible shaft by adjusting the two set nuts 9 on the swing arm 3 and tighten the set nuts 9. The radius value is the distance from the center point of the bearing connecting rod 6 to the center point of the pin hole at the lower end of the swing arm.

[0050] By adjusting the set screw on slider 4, the central axis of the flexible shaft connecting rod 11 is aligned with the flat flexible shaft product. After fixing the three-dimensional position of the flexible shaft, the internal thread M12 on the flexible shaft connecting rod 11 engages with the external thread of the flexible shaft, and is secured with a set nut. This ensures a rigid connection with no axial clearance. Next, the set screw between slider 4 and slide rod 3 is adjusted. The set value is adjusted according to the force range of the flexible shaft model to protect the product from damage if jamming occurs during testing by increasing the swing radius. At the initial testing position of the flexible shaft product, the swing arm is vertically downward. At this point, the rotary encoder displays a zero angle value of 0.

[0051] Before disassembling the flexible shaft, ensure that the front drive end and tension / compression sensors are turned off; also, ensure that the flexible shaft is not jammed by manually pushing and pulling. Loosen the flexible shaft connecting rod 11 and the set nut on the flexible shaft, and then loosen the M12 internal thread connecting to the flexible shaft to separate the device from the product. Note that if the M12 internal thread cannot be rotated, the flexible shaft can be reversed, but the external thread of the connecting end of the flexible shaft must not be damaged.

[0052] The use of the bearing connecting rod 6, the swing arm 3, and the slide rod 3 enables the product testing to simulate the actual working conditions of a pilot pushing and pulling the control stick: there are changes in angle and swing length. The use of the rotary encoder 8, the bearing connecting rod 6, and the swing arm 3 enables the testing device to test the yaw angle of the flexible shaft with high precision throughout its entire stroke, meeting the testing range of 0 to ±60° for the entire series of flexible shaft products, with a testing accuracy of ±0.01°, and truly testing the data of the flexible shaft under real working conditions.

[0053] It should be noted that this invention belongs to the field of product testing and experimentation, specifically relating to a flexible shaft oscillation device and method. The oscillation device is a crucial component for testing the performance and lifespan data of flexible shaft products, directly affecting the authenticity and reliability of the test data. The flexible shaft oscillation device and method of this invention involves fixing two slide rods 2 to a mounting bracket 1 via four slide rod brackets 10; fixing two sliders 4 to the two slide rods 2 via set screws; fixing a bearing bracket 5 to the sliders 4 via screws; installing bearings 7 on the bearing bracket 5; connecting the two bearings to a bearing connecting rod 6 via a retaining ring and a retaining groove; installing a rotary encoder 8 at one end of the bearing bracket 5 via screws and fixing the bearing connecting rod 6 to a set screw; fixing the oscillating arm 3 and the bearing connecting rod to a retaining rod 11 to ensure proper transmission via a retaining pin with a retaining groove and a snap fastener.

[0054] This invention enables flexible shaft testing to simulate the swing angle and actual force value of a pilot's push-pull control stick, which not only improves the accuracy and efficiency of product testing, but also meets the requirements of flexible shaft reciprocating tests for swing length, angle and force value.

Claims

1. A flexible shaft oscillation testing device, characterized in that, The flexible shaft oscillation testing device includes: Mounting bracket; A slide bar bracket is mounted on the mounting bracket; A slide bar is mounted on the slide bar bracket; A slider is disposed on the slide bar, wherein the slider is capable of sliding along the slide bar; The bearing connecting rod is rotatably connected to the slider. A swing arm, one end of which is connected to the bearing connecting rod; the other end of which is used to connect to a flexible shaft; The testing apparatus also includes: The bearing bracket is mounted on the slider; A bearing is mounted on the bearing bracket, and the bearing is used to mount the bearing connecting rod. A rotary encoder includes a blind hole and a bracket, the bracket being mounted on a bearing bracket; one end of the bearing connecting rod is connected to the blind hole; The actual swing radius of the swing arm is adjusted by adjusting the connection position of the bearing connecting rod and the swing arm; then the axial center line of the flexible shaft connecting rod is adjusted to be concentric with the flexible shaft by tightening the set screw on the slider; the real-time reciprocating swing angle of the flexible shaft is tested by fastening the rotary encoder to the bearing connecting shaft.

2. The flexible shaft oscillation testing device according to claim 1, characterized in that, The bearings are connected to the bearing connecting rod by means of retaining rings and retaining grooves.

3. The flexible shaft oscillation testing device according to claim 2, characterized in that, The length of the swing arm is adjusted by adjusting the connection position between the bearing connecting rod and the swing arm, thereby adjusting the actual swing radius.

4. The flexible shaft oscillation testing device according to claim 3, characterized in that, The testing apparatus also includes: A flexible shaft connecting rod is connected to the other end of the swing arm, and the flexible shaft connecting rod is used to connect the flexible shaft.

5. The flexible shaft oscillation testing device according to claim 4, characterized in that, The flexible shaft connecting rod is connected to the swing rotation, and the mounting bracket is a square frame; The testing apparatus also includes: A base for mounting the square frame; wherein the square frame is movable along the base.

6. A method for testing the oscillation of a flexible shaft, characterized in that, The method is applied to the flexible shaft oscillation test device as described in claim 5, and the method includes: Adjust the swing radius corresponding to the model of the flexible shaft by adjusting the two set nuts on the swing arm; Adjust the set screw on the slider to make the central axis of the flexible shaft connecting rod concentric with the flat flexible shaft product; The flexible shaft product and the flexible shaft connecting rod are fixedly assembled using internal threads; In the test state, the swing arm swings back and forth as the flexible shaft is pushed and pulled, and drives the bearing connecting rod to rotate in both directions. The rotary encoder uses the number of light spots counted in both directions to actually test the angle value of the flexible shaft swinging back and forth. The method further includes: Before installing the flexible shaft product, first confirm the simulated pilot control radius value and three-dimensional spatial layout of the flexible shaft product to deduce the height of the flexible shaft connection end. Adjust the swing radius corresponding to the model flexible shaft by adjusting the two set nuts on the swing arm and tighten the set nuts. The radius value is the distance from the center point of the bearing connecting rod to the center point of the pin hole at the lower end of the swing arm. By adjusting the set screw on the slider, the central axis of the flexible shaft connecting rod is made concentric with the flat flexible shaft product. After fixing the three-dimensional position of the flexible shaft, the internal thread M12 on the flexible shaft connecting rod mates with the external thread of the flexible shaft and is fixed by the set nut. This is a rigid connection and no axial clearance is allowed. Then, the set screw between the slider and the sliding rod is adjusted. The set value is adjusted according to the force range of the flexible shaft model. This is to protect the product from damage by increasing the swing radius in case of jamming during the flexible shaft test. The starting position of the flexible shaft product test is the vertical downward position of the swing arm. At this time, the rotary encoder displays the angle value as zero. Before disassembling the flexible shaft product, ensure that the front drive end and tension / compression sensor are both turned off; at the same time, ensure that the flexible shaft product is not stuck by manually pushing and pulling; loosen the flexible shaft connecting rod and the set nut on the flexible shaft, and then loosen the M12 internal thread connected to the flexible shaft to separate the device from the product. Note that if the M12 internal thread cannot be rotated, reverse the flexible shaft. Do not damage the external thread of the flexible shaft product's connecting end. The use of bearing connecting rod, swing arm and slide bar in combination enables the product test to simulate the actual working conditions of a pilot pushing and pulling the control stick: there are changes in angle and swing length; the use of rotary encoder, bearing connecting rod and swing arm in combination enables the test device to test the yaw angle of the flexible shaft with high precision throughout the whole stroke, meeting the test range of 0 to ±60° for the entire series of flexible shaft products, with a test accuracy of ±0.01°, and truly test the data of the flexible shaft under real working conditions.

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