Flexible shaft tension-torsion testing machine

Abstract

The utility model belongs to the technical field of testing devices, and particularly relates to a flexible shaft tension-torsion testing machine, which comprises a rack, a driving device, a tension-torsion testing device, a tension-torsion testing device, a tension-torsion testing device, a tension-torsion testing device and a tension-torsion testing device, the angle sensor is configured to detect the rotating angle of the rotating end; a tension-torsion sensor; the lower clamp is connected with the rotating end of the driving device, and the upper clamp is connected with the bottom of the tension-torsion sensor; one end of the pull rope is connected with the top of the tension-torsion sensor, the other end of the pull rope is connected with the counterweight device through the pulley assembly, and the pull rope is of an inverted-U-shaped structure. According to the utility model, the tension-torsion experiment of the flexible shaft is realized in a vertical manner, and a certain tension is applied to the flexible shaft through the counterweight device; preset rotating force is applied to the flexible shaft through cooperation of the angle sensor and the driving device; the tension and torsion sensor can measure both tension and torque, so that the tension and torsion result of the flexible shaft can be tested. The testing device is accurate and reliable in testing.

Description

Technical Field

[0001] This utility model belongs to the field of testing device technology, specifically relating to a flexible shaft tension and torsion testing machine. Background Technology

[0002] Flexible shafts are widely used in the automotive, machinery, and aerospace industries. A flexible shaft testing machine is a device used to test the performance of flexible shafts. Specifically, a tension-torsion testing machine is used to perform tension-torsion tests on flexible shafts, measuring the torque parameters of the flexible shaft under a certain tensile force to ensure that the flexible shaft can operate safely and reliably under specific working conditions.

[0003] Existing flexible shaft tensile and torsion testing machines are usually horizontal, meaning the flexible shaft is placed horizontally on the testing machine for testing, which results in a large detection error. Utility Model Content

[0004] The present invention addresses the aforementioned technical problems by providing a flexible shaft tension and torsion testing machine.

[0005] A flexible shaft tensile-torsion testing machine includes a frame, a worktable mounted on the frame, and further includes:

[0006] The driving device has a rotating end that rotates about the vertical direction;

[0007] An angle sensor is configured to detect the rotation angle of the rotating end;

[0008] Tension / torsion sensor;

[0009] The lower clamp and the upper clamp are located above the worktable. The lower clamp is connected to the rotating end of the drive device, and the upper clamp is connected to the bottom of the tension-torsion sensor. The lower clamp is located below the upper clamp and there is a preset distance between them.

[0010] The pull rope has one end connected to the top of the tension-torsion sensor and the other end connected to the counterweight device via a pulley assembly. The pull rope has an inverted U-shaped structure.

[0011] Optionally, the driving device is a servo motor, the motor shaft of the servo motor is a rotating end, and the axial direction of the motor shaft of the servo motor is vertical.

[0012] Optionally, the tension / torsion sensor is slidably connected to the frame in the vertical direction.

[0013] Optionally, it also includes:

[0014] The connecting plate has an inverted L-shaped structure. The bottom of the horizontal section of the connecting plate is connected to the top of the tension-torsion sensor, and the top of the horizontal section of the connecting plate is connected to the pull rope. The side of the vertical section of the connecting plate is slidably connected to the frame.

[0015] Optionally, the frame is provided with a slide rail, the length direction of which is vertical;

[0016] The vertical section of the connecting plate is provided with a slider, which is slidably connected to the slide rail.

[0017] Optionally, both the lower clamp and the upper clamp have a connecting shaft. One end of the connecting shaft is connected to the rotating end of the driving device or to the bottom of the tension-torsion sensor, and the other end of the connecting shaft includes two semi-cylindrical clamping parts.

[0018] Both clamping parts have a receiving groove on their planar sides. The length direction of the receiving groove is vertical. The two clamping parts are a fixed clamping part and a movable clamping part. When the movable clamping part is detachably connected to the fixed clamping part, the receiving grooves of the two parts are aligned to form a receiving cavity for accommodating the clamping flexible shaft.

[0019] Optionally, each of the two clamping parts has one or more connecting and fixing holes along the horizontal direction. When the movable clamping part is detachably connected to the fixed clamping part, the connecting and fixing holes of the two are aligned so that the two are detachably fixed together by a fastener.

[0020] Optionally, the angle sensor is sleeved outside the connecting shaft of the lower clamp.

[0021] Optionally, the drive device is located at the bottom of the worktable, the connecting shaft of the lower clamp passes through the worktable and is connected to the drive device via a coupling, and the connecting shaft of the lower clamp is connected to the worktable via a bearing.

[0022] Optionally, the pulley assembly includes:

[0023] A pulley mounting bracket is installed on the frame on one side above the tension / torsion sensor;

[0024] Two pulleys are mounted side by side in a horizontal direction on the pulley mounting frame, and the pull rope abuts against the two pulleys in sequence.

[0025] Optionally, the counterweight device includes:

[0026] A counterweight frame, wherein the counterweight frame is connected to the other end of the pull rope;

[0027] One or more weights are stacked on the counterweight frame.

[0028] Beneficial effects: This invention uses a vertical method to perform tension and torsion tests on a flexible shaft. A certain tensile force is applied to the flexible shaft through a counterweight device; a preset rotational force is applied to the flexible shaft through an angle sensor in conjunction with a drive device; and the tension and torsion sensor, which can measure both tensile force and torque, is used to test the tension and torsion results of the flexible shaft. This invention provides accurate and reliable testing. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 for Figure 1 Connection diagram between the middle drive unit and the lower clamp;

[0031] Figure 3 for Figure 1 Connection diagram between the tension / torsion sensor and the upper clamp;

[0032] Figure 4 for Figure 1 Diagram showing the connection relationship between the tension rope, tension / torsion sensor, pulley assembly, and counterweight device. Detailed Implementation

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0034] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0035] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0036] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0037] Reference Figures 1 to 4 This utility model provides a flexible shaft tension and torsion testing machine, which includes a frame 1, a drive device 2, an angle sensor 3, a tension and torsion sensor 4, a lower clamp 5, an upper clamp 6, a pull rope 7, a pulley assembly 8, and a counterweight device 9.

[0038] A worktable 11 is mounted on the frame 1. The drive unit 2 has a rotating end that rotates vertically. An angle sensor 3, also known as a rotation angle sensor, is configured to detect the rotation angle of the rotating end. The lower clamp 5 and the upper clamp 6 are both located above the worktable 11. The lower clamp 5 is connected to the rotating end of the drive unit 2, and the upper clamp 6 is connected to the bottom of the tension-torque sensor 4. The lower clamp 5 is located below the upper clamp 6 and there is a preset distance between them. One end of the pull rope 7 is connected to the top of the tension-torque sensor 4, and the other end of the pull rope 7 is connected to the counterweight device 9 via the pulley assembly 8. The pull rope 7 has an inverted U-shaped structure.

[0039] In use, the lower end of the flexible shaft 10 to be tested is clamped and fixed by the lower clamp 5, and the upper end of the flexible shaft 10 is clamped and fixed by the upper clamp 6. A counterweight device 9 is configured with a preset weight to achieve a certain pulling force on the flexible shaft 10. The drive device 2 is driven, which rotates the lower clamp 5 and the flexible shaft 10 to a preset rotation angle, which is detected and determined by the angle sensor 3. The tension and torque are measured by the tension-torque sensor 4 to obtain the tension-torque test results.

[0040] In one embodiment, the driving device 2 is a servo motor, the motor shaft of the servo motor is the rotating end, and the axial direction of the motor shaft of the servo motor is vertical.

[0041] Preferably, the servo motor is a servo motor reducer with a speed reducer.

[0042] In one embodiment, the tension / torsion sensor 4 is slidably connected to the frame 1 in a vertical direction.

[0043] This allows the height to be automatically adjusted by pulling the rope 7, using the counterweight device 9 to adjust the weight, and the tension sensor 4 and the flexible shaft 10 connected to it.

[0044] In one embodiment, reference is made to Figure 1 and Figure 3The flexible shaft tension and torsion testing machine also includes a connecting plate 12, which has an inverted L-shaped structure. The bottom of the horizontal section of the connecting plate 12 is connected to the top of the tension and torsion sensor 4, and the top of the horizontal section of the connecting plate 12 is connected to the pull rope 7. The side of the vertical section of the connecting plate 12 is slidably connected to the frame 1.

[0045] Specifically, in actual implementation, a tension-torsion sensor 4 with threaded holes on both the top and bottom sides, or at least with a threaded hole at the top, can be selected. The horizontal section of the connecting plate 12 is detachably connected to the tension-torsion sensor 4 by bolts or other fasteners.

[0046] The top of the horizontal section of the connecting plate 12 may be provided with a threaded hole, and the pull rope 7 can be detachably connected to the connecting plate 12 through existing fasteners such as fisheye bolts / ring bolts / O-bolts.

[0047] In one embodiment, reference is made to Figure 1 and Figure 3 The frame 1 is equipped with a slide rail 13, and the length direction of the slide rail 13 is vertical.

[0048] A slider 14 is provided on the side of the vertical section of the connecting plate 12, and the slider 14 is slidably connected to the slide rail 13.

[0049] In one embodiment, the lower clamp 5 and the upper clamp 6 employ substantially the same structure to clamp and fix the flexible shaft 10. Taking the lower clamp 5 as an example:

[0050] Reference Figure 2 The lower clamp 5 has a connecting shaft 51, the lower end of which is connected to the rotating end of the drive device 2. The upper end of the connecting shaft 51 includes two semi-cylindrical clamping parts. The two clamping parts are a fixed clamping part 52 and a movable clamping part 53. The fixed clamping part 52 has a receiving groove 521 on its planar side, and the movable clamping part 53 has a receiving groove 531 on its planar side. The length direction of the receiving grooves 521 and 531 is vertical. When the movable clamping part 53 is detachably connected to the fixed clamping part 52, the receiving grooves 521 and 531 are aligned to form a receiving cavity for accommodating and clamping the flexible shaft.

[0051] Preferably, the connecting shaft 51 and the fixed clamping part 52 are integrally formed. The movable clamping part 53 can be a part that is cut out from the fixed clamping part 52 after being integrally formed with the connecting shaft 51.

[0052] Reference Figure 3 Similarly, the upper end of the connecting shaft 61 of the upper clamp 6 is connected to the bottom of the tension sensor 4. The lower end of the connecting shaft 61 includes two semi-cylindrical clamping parts, namely a fixed clamping part 62 and a movable clamping part 63. The fixed clamping part 62 adopts the same structure as the fixed clamping part 52, and the movable clamping part 63 adopts the same structure as the movable clamping part 53.

[0053] In one embodiment, reference is made to Figure 2 Both the fixed clamping part 52 and the movable clamping part 53 have one or more connecting and fixing holes 54 along the horizontal direction. When the movable clamping part 53 is detachably connected to the fixed clamping part 52, the connecting and fixing holes 54 of the two are aligned so that the two can be detachably fixed together by the fastener.

[0054] Reference Figure 3 Similarly, both the fixed clamping part 62 and the movable clamping part 63 have one or more connecting and fixing holes 64 along the horizontal direction. When the movable clamping part 63 is detachably connected to the fixed clamping part 62, the connecting and fixing holes 64 of the two are aligned so that the two can be detachably fixed together by the fastener.

[0055] In one embodiment, reference is made to Figure 2 Angle sensor 3 is mounted on the connecting shaft 51 of the lower clamp 5.

[0056] In one embodiment, reference is made to Figure 1 and Figure 2 The drive unit 2 is located at the bottom of the worktable 11. The connecting shaft 51 of the lower clamp 5 passes through the worktable 11 and is connected to the drive unit 2 via a coupling 55. The connecting shaft 51 of the lower clamp 5 is connected to the worktable 11 via a bearing 56.

[0057] In this embodiment with the above design, especially the design of bearing 56, the torque generated by the drive device 2 driving the flexible shaft 10 is less affected by external factors.

[0058] In one embodiment, the pull rope 7 is a steel wire rope.

[0059] In one embodiment, reference is made to Figure 4 The pulley assembly 8 includes a pulley mounting bracket 81 and two pulleys 82.

[0060] The pulley mounting bracket 81 is mounted on the frame 1 above the tension sensor 4. Two pulleys 82 are mounted side by side in the horizontal direction on the pulley mounting bracket 81, and the pull rope 7 abuts against the two pulleys 82 in sequence.

[0061] In one embodiment, reference is made to Figure 4 The counterweight device 9 includes a counterweight frame 91 and one or more weights 92.

[0062] The counterweight frame 91 is connected to the other end of the pull rope 7. One or more weights 92 are stacked on the counterweight frame 91. The tension on the pull rope 7 is adjusted by using one or more weights 92.

[0063] In practice, the connection method between the pull rope 7 and the counterweight frame 91 is the same as the connection method between the pull rope 7 and the connecting plate 12.

[0064] The preferred embodiments of this utility model have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this utility model. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A flexible shaft tension-torsion testing machine, comprising a frame, wherein a worktable is provided on the frame, characterized in that, Also includes: The driving device has a rotating end that rotates about the vertical direction; An angle sensor is configured to detect the rotation angle of the rotating end; Tension / torsion sensor; The lower clamp and the upper clamp are located above the worktable. The lower clamp is connected to the rotating end of the drive device, and the upper clamp is connected to the bottom of the tension-torsion sensor. The lower clamp is located below the upper clamp and there is a preset distance between them. The pull rope has one end connected to the top of the tension-torsion sensor and the other end connected to the counterweight device via a pulley assembly. The pull rope has an inverted U-shaped structure.

2. The flexible shaft tensile-torsion testing machine as described in claim 1, characterized in that, The driving device is a servo motor, the motor shaft of the servo motor is the rotating end, and the axial direction of the motor shaft of the servo motor is vertical.

3. The flexible shaft tensile-torsion testing machine as described in claim 1, characterized in that, The tension / torsion sensor is slidably connected to the frame vertically.

4. The flexible shaft tensile-torsion testing machine as described in claim 3, characterized in that, Also includes: The connecting plate has an inverted L-shaped structure. The bottom of the horizontal section of the connecting plate is connected to the top of the tension-torsion sensor, and the top of the horizontal section of the connecting plate is connected to the pull rope. The side of the vertical section of the connecting plate is slidably connected to the frame. The frame is equipped with a slide rail, and the length direction of the slide rail is vertical; The vertical section of the connecting plate is provided with a slider, which is slidably connected to the slide rail.

5. The flexible shaft tensile-torsion testing machine as described in claim 1, characterized in that, Both the lower clamp and the upper clamp have a connecting shaft. One end of the connecting shaft is connected to the rotating end of the driving device or to the bottom of the tension-torsion sensor. The other end of the connecting shaft includes two semi-cylindrical clamping parts. Both clamping parts have a receiving groove on their planar sides. The length direction of the receiving groove is vertical. The two clamping parts are a fixed clamping part and a movable clamping part. When the movable clamping part is detachably connected to the fixed clamping part, the receiving grooves of the two parts are aligned to form a receiving cavity for accommodating the clamping flexible shaft.

6. The flexible shaft tensile-torsion testing machine as described in claim 5, characterized in that, Each of the two clamping parts has one or more connecting and fixing holes along the horizontal direction. When the movable clamping part is detachably connected to the fixed clamping part, the connecting and fixing holes of the two are aligned so that the two can be detachably fixed together by a fastener.

7. The flexible shaft tensile-torsion testing machine as described in claim 5, characterized in that, The angle sensor is sleeved outside the connecting shaft of the lower clamp.

8. The flexible shaft tensile-torsion testing machine as described in claim 5, characterized in that, The drive device is located at the bottom of the worktable. The connecting shaft of the lower clamp passes through the worktable and is connected to the drive device via a coupling. The connecting shaft of the lower clamp is connected to the worktable via a bearing.

9. The flexible shaft tensile-torsion testing machine according to any one of claims 1 to 8, characterized in that, The pulley assembly includes: A pulley mounting bracket is installed on the frame on one side above the tension / torsion sensor; Two pulleys are mounted side by side in a horizontal direction on the pulley mounting frame, and the pull rope abuts against the two pulleys in sequence.

10. The flexible shaft tensile-torsion testing machine according to any one of claims 1 to 8, characterized in that, The counterweight device includes: A counterweight frame, wherein the counterweight frame is connected to the other end of the pull rope; One or more weights are stacked on the counterweight frame.

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