A test device for a bend-resistant power cord

Abstract

The utility model provides a kind of test device of bending-resistant power cord belongs to power cord technical field, the test device of this bending-resistant power cord includes support base, eccentric seat for fixing power cord and holding sleeve, eccentric seat is screw-threaded connection with first fixed knob, and third fixed knob is screw-threaded connection on holding sleeve;Motor A is installed on support base, and the output shaft of motor A is fixedly connected with rotary disc by rotating rod, and eccentric seat is slidably connected on rotary disc;The top surface of rotary disc is fixedly installed with the fixed plate of cross section being "U" type, and support base is slidably connected in fixed plate, and the opposite side of support base and rotary disc is fixedly connected with the end surface of eccentric seat;The utility model is used to solve the technical problem that eccentric seat is fixed on rotary disc, only circular arc track bending of fixed radius can be generated, the circumferential track formed is single, leading to the range of test is narrower.

Description

Technical Field

[0001] This utility model belongs to the field of power cord technology, and more specifically, relates to a testing device for a power cord that is resistant to bending. Background Technology

[0002] Power cords are key components for the normal operation of electrical equipment and are widely used. To ensure that the power cords produced have stable performance and reliable quality, torsion and bending resistance tests are conducted during production. These tests are crucial for the use of power cords in various complex and dynamic environments. The utility model patent with application number CN202122143983.2 (publication number CN216160357U) discloses a power cord breakage resistance quality testing device, including a support base, a heat dissipation mounting base, a drive mechanism, a moving mechanism, and a clamping mechanism. The heat dissipation mounting base is located on the left side of the upper end of the support base, the drive mechanism is located inside the heat dissipation mounting base, the moving mechanism is located on the right side of the upper end of the support base, and the clamping mechanism is located above the moving mechanism. The drive mechanism includes a drive motor, a rotating disk, an eccentric seat, an inner sleeve, and a first fixing knob. The rotating disk is fixedly connected to the movable end of the drive motor. The aforementioned patent can mimic the continuous bending phenomenon of the circuit during daily use. However, since the eccentric seat is fixed on the rotating disk, it can only produce a circular arc trajectory with a fixed radius. The resulting circumferential trajectory is singular, leading to a narrow testing range. Utility Model Content

[0003] In view of this, the present invention provides a test device for bending-resistant power cords, which solves the problem that when the eccentric seat is fixed on the rotating disk, it can only produce a circular arc trajectory with a fixed radius, resulting in a single circumferential trajectory.

[0004] This utility model is implemented as follows: This utility model provides a test device for a power cord with bending resistance, including a support base, an eccentric seat for fixing the power cord and a clamping sleeve. A first fixing knob is threadedly connected to the eccentric seat, and a third fixing knob is threadedly connected to the clamping sleeve. The support base is equipped with a motor A, and a rotating disk is fixedly connected to the output shaft of the motor A via a rotating rod. The eccentric seat is slidably connected to the rotating disk.

[0005] Based on the above technical solution, the testing device for bending-resistant power cords of this utility model can be further improved as follows: Furthermore, a U-shaped fixing plate is fixedly installed on the top surface of the rotating disk, and a support seat is slidably connected inside the fixing plate. The side of the support seat opposite to the rotating disk is fixedly connected to the end face of the eccentric seat.

[0006] Furthermore, the fixing plate has multiple through holes equidistantly arranged on its two opposite side walls. A screw is inserted into two opposite through holes. The screw passes through the support base and is threaded with a nut at its end. The nut is attached to the opposite two outer walls of the fixing plate.

[0007] Furthermore, the support base is provided with a longitudinally movable support plate, a movable plate is movably connected to the support plate, and the supporting sleeve is fixedly installed on the movable plate by a lifting rod.

[0008] Furthermore, the support base has a longitudinally arranged ball screw, the two ends of the screw body of the ball screw are respectively rotatably connected to the vertical plate, and a base is fixedly installed on the outer peripheral surface of the nut body of the ball screw.

[0009] Furthermore, the bottom wall of the upright plate is fixedly installed on the top wall of the support base, and the top wall of the base is fixedly installed on the bottom wall of the support plate.

[0010] Compared with the prior art, the beneficial effects of the bend-resistant power cord testing device provided by this utility model are: By setting up support bases and fixing plates, the position of the eccentric seat on the rotating disk can be adjusted. When the rotating disk rotates, the eccentric seat can perform circumferential rotation at multiple radius sizes and can also rotate in place, making the testing range wider and adaptable to the testing needs of power cables of different specifications. The eccentric seat can move on the rotating disk, and the clamping sleeve can move on the support base. The combination of the two can realize a variety of testing methods and achieve simulation testing under different usage scenarios. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 A front view of an overall test device for a power cord with bending resistance; Figure 2 Axonometric view of the components on the rotating disk; Figure 3 This is a top view of a ball screw; Figure 4 This is an isometric view of a ball screw. The components represented by each number in the attached diagram are listed below: 1. Support base; 11. Motor A; 12. Rotating rod; 2. Rotary disk; 21. Fixing plate; 22. Support seat; 23. Through hole; 24. Screw; 25. Nut; 3. Eccentric seat; 31. First fixing knob; 4. Support plate; 41. Slide groove; 42. Moving plate; 43. Sliding block; 44. Second fixing knob; 45. Lifting rod; 5. Holding sleeve; 51. Third fixing knob; 6. Ball screw; 60. Motor B; 61. Screw body; 62. Vertical plate; 63. Nut body; 64. Base; 65. Guide rail; 66. Guide block. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] Example 1 like Figure 1-4 As shown, this utility model provides a test device for a power cord that is resistant to bending, including a support base 1, an eccentric seat 3 for fixing the power cord, and a clamping sleeve 5. A first fixing knob 31 is threadedly connected to the eccentric seat 3, and a third fixing knob 51 is threadedly connected to the clamping sleeve 5. Among them, a motor A11 is installed on the support base 1, and a rotating disk 2 is fixedly connected to the output shaft of the motor A11 through a rotating rod 12. An eccentric seat 3 is slidably connected to the rotating disk 2.

[0019] Optionally, in the above technical solution, a fixing plate 21 with a "U" shaped cross-section is fixedly installed on the top surface of the rotating disk 2. A support seat 22 is slidably connected inside the fixing plate 21. The side of the support seat 22 opposite to the rotating disk 2 is fixedly connected to the end face of the eccentric seat 3.

[0020] Optionally, in the above technical solution, the fixing plate 21 has multiple through holes 23 equidistantly arranged on the opposite side walls, and a screw 24 is inserted into two opposite through holes 23. The screw 24 passes through the support base 22 and is threaded with a nut 25 at its end. The nut 25 is attached to the opposite two outer walls of the fixing plate 21.

[0021] Optionally, in the above technical solution, the support base 1 is provided with a longitudinally movable support plate 4, a movable plate 42 is movably connected to the support plate 4, and a supporting sleeve 5 is fixedly installed on the movable plate 42 by a lifting rod 45.

[0022] Optionally, in the above technical solution, the support base 1 has a longitudinally arranged ball screw 6, the two ends of the screw body 61 of the ball screw 6 are respectively rotatably connected to the vertical plate 62, and the base 64 is fixedly installed on the outer peripheral surface of the nut body 63 of the ball screw 6.

[0023] Optionally, in the above technical solution, the bottom wall of the upright plate 62 is fixedly installed on the top wall of the support base 1, and the top wall of the base 64 is fixedly installed on the bottom wall of the support plate 4.

[0024] Furthermore, two pads are fixedly installed on the support base 1, and guide rails 65 are fixedly installed on each pad. Guide blocks 66 are slidably connected to the guide rails 65. The front and rear ends of the bottom wall of the support plate 4 are fixedly connected to the guide blocks 66 on the same side, respectively, to provide guidance for the lateral movement of the support plate 4.

[0025] Furthermore, the support plate 4 has two horizontally arranged sliding grooves 41, and a slider 43 is slidably connected in the sliding grooves 41. The slider 43 is fixedly installed on the bottom wall of the movable plate 42. A second fixing knob 44 is threadedly connected to the movable plate 42. The lower end of the second fixing knob 44 passes through the movable plate 42 and extends to the upper end of the support plate 4.

[0026] Furthermore, a motor B60 is fixedly installed on the support base 1. The output axis of the motor B60 extends forward and its end is connected to the rear end of the screw body 61.

[0027] Both motor A11 and motor B60 are mounted on the support base 1 via motor mounts. Both motor A11 and motor B60 are existing servo motors or stepper motors, which are precisely driven by a controller (such as a microcontroller or PLC).

[0028] In the initial position, the eccentric seat 3 and the clamping sleeve 5 are laterally aligned, and the nut body 63 is located in the middle of the screw body 61. Preferably, a servo motor with an encoder can be used. During the initial installation or debugging, the nut body 63 is manually moved to the physical midpoint of the screw body 61 (i.e., the clamping sleeve 5 and the eccentric seat 3 are laterally aligned). The current encoder reading is recorded and set as the "initial position" through the controller software. During normal operation, the controller knows the precise position of the nut body 63 in real time through the encoder. When a reset is required, the controller directly issues a command to drive the nut body 63 to move to the encoder reading corresponding to the previously recorded "initial position".

[0029] Among them, when the eccentric seat 3 is located at the lowest through hole 23, it corresponds to the height of the supporting sleeve 5, that is, the two are concentric.

[0030] Working principle: When in use, fix both ends of the power cord inside the eccentric seat 3 and the retaining sleeve 5, and test the power cord. During the torsion test: the clamping sleeve 5 is stationary in place, and the eccentric seat 3 rotates in place on the rotating disk 2, that is, the eccentric seat 3 is located at the innermost through hole 23; During the circumferential bending test: the clamping sleeve 5 remains stationary, and the eccentric seat 3 rotates in a circle following the rotating disk 2, that is, the eccentric seat 3 is located at the through hole 23 outside the innermost through hole 23; During the straight bending test: the eccentric seat 3 remains stationary, while the clamping sleeve 5 moves longitudinally in a straight line back and forth.

[0031] The position adjustment method of the eccentric seat 3 is as follows: unscrew the nuts 25 on both sides and take the screw 24 out of the through hole 23. The support seat 22 slides in the fixing plate 21. When it slides to the corresponding through hole 23, insert the screw 24 into the through hole 23 and pass through the support seat 22. Tighten the two nuts 25 on the screw 24 and fit against the outer wall of the fixing plate 21 to complete the position adjustment and positioning of the eccentric seat 3 on the support seat 22. Among them, the closer the support seat 22 is to the outer edge of the rotating disk 2, the larger the radius of circumferential rotation.

[0032] The position adjustment method of the clamping sleeve 5 is as follows: start the motor to drive the screw body 61 to rotate in place, the nut body 63 moves axially along the central axis of the screw body 61, the base 64 moves with the nut body 63 and drives the support plate 4 to move axially; when the motor rotates forward, the support plate 4 moves forward, and when the motor rotates in reverse, the support plate 4 moves backward, so that the motor rotates forward a certain number of times and then reverses in reverse a certain number of times, and so on, so that the support plate 4 moves longitudinally back and forth.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test device for a power cord with bending resistance, comprising a support base (1), an eccentric seat (3) for fixing the power cord, and a retaining sleeve (5), wherein a first fixing knob (31) is threadedly connected to the eccentric seat (3), and a third fixing knob (51) is threadedly connected to the retaining sleeve (5). Its features are, A motor A (11) is installed on the support base (1). A rotating disk (2) is fixedly connected to the output shaft of the motor A (11) via a rotating rod (12). The eccentric seat (3) is slidably connected to the rotating disk (2).

2. The testing device for a power cord with bending resistance according to claim 1, characterized in that, A U-shaped fixing plate (21) is fixedly installed on the top surface of the rotating disk (2). A support seat (22) is slidably connected inside the fixing plate (21). The support seat (22) is fixedly connected to the end face of the eccentric seat (3) on the side opposite to the rotating disk (2).

3. The testing device for a power cord with bending resistance according to claim 2, characterized in that, The fixing plate (21) has multiple through holes (23) equidistantly arranged on its two side walls. A screw (24) is inserted into two of the through holes (23). The screw (24) passes through the support base (22) and is threaded with a nut (25) at its end. The nut (25) is attached to the two outer walls of the fixing plate (21).

4. The testing device for a power cord with bending resistance according to claim 1, characterized in that, The support base (1) is provided with a longitudinally movable support plate (4), and a movable plate (42) is movably connected to the support plate (4). The support sleeve (5) is fixedly installed on the movable plate (42) by a lifting rod (45).

5. The testing device for a power cord with bending resistance according to claim 4, characterized in that, The support base (1) has a longitudinally arranged ball screw (6), the two ends of the screw body (61) of the ball screw (6) are respectively rotatably connected to the upright plate (62), and the base (64) is fixedly installed on the outer circumferential surface of the nut body (63) of the ball screw (6).

6. The testing device for a power cord with bending resistance according to claim 5, characterized in that, The bottom wall of the upright plate (62) is fixedly installed on the top wall of the support base (1), and the top wall of the base (64) is fixedly installed on the bottom wall of the support plate (4).

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