Power cable bending test device

Abstract

The application discloses a kind of electric power cable bending test device, including base and fixed assembly, fixed assembly is set on base, fixed assembly includes ring frame and clamping piece, ring frame is provided with the slide of forming preset movement path, clamping piece is movably connected in slide along preset movement path, clamping piece is used to wear cable;Fixed assembly is provided with two groups, at least one group of fixed assembly is movably set on base along linear movement path, when one group of fixed assembly moves along linear movement path, one group of fixed assembly is close to or away from another group of fixed assembly.In the application, when one group of fixed assembly is close to another group of fixed assembly, cable is bent at an angle, and at least three positions are bent.The bending test device of the application can not only bend the cable at multiple angles and multiple positions, but also test the tensile state of the cable, so that the cable can be tested accurately and comprehensively.

Description

Technical Field

[0001] This invention relates to the technical field of cable bending test equipment, and in particular to a power cable bending test device. Background Technology

[0002] Cable bending tests are crucial for evaluating the mechanical properties of power cables. Their primary purpose is to ensure that cables can withstand bending stress without damage during installation and use. Current cable bending test equipment typically places the cable between two bending test rollers, performing the bending test by rotating the rollers and adjusting the distance between them. However, power cables undergo significant bending and twisting during infrastructure construction. Therefore, current cable bending test equipment cannot fully meet the bending requirements of cables during infrastructure construction and use, resulting in insufficient testing accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a power cable bending test device to overcome the shortcomings of the prior art, meet the bending requirements of cables during infrastructure construction, and realize large-angle bending tests on cables.

[0004] To achieve one of the above objectives, the present invention provides a power cable bending test apparatus, comprising:

[0005] A base, on which a winding guide is provided for winding and pulling cables;

[0006] A fixing component is disposed on the base. The fixing component includes a ring frame and a clamping member. The ring frame is provided with a slide rail forming a preset movement path. The clamping member is movably connected to the slide rail along the preset movement path. The clamping member has a clamping through groove extending along its length for threading a cable. The slide rail includes an inner concave portion near the center of the ring frame and an outer convex portion away from the center of the ring frame.

[0007] The fixing components are provided in two sets, and at least one set of the fixing components is movably disposed on the base along a straight moving path. When one set of the fixing components moves along the straight moving path, one set of the fixing components moves closer to or further away from the other set of the fixing components.

[0008] The winding guide is positioned on one side of one set of fixing components opposite to the other set of fixing components.

[0009] As a further improvement of one embodiment of the present invention, the slide rail further includes a buffer portion connecting the concave portion and the convex portion, wherein the concave portion, the convex portion and the buffer portion are all arc-shaped.

[0010] As a further improvement of one embodiment of the present invention, the ratio between the closest distance between the concave portion and the center of the ring frame and the farthest distance between the convex portion and the center of the ring frame is in the range of 1:1.5~4.

[0011] As a further improvement of one embodiment of the present invention, the ring frame includes:

[0012] A support plate is fixed to the base, and the outer periphery of the support plate is configured as the slide rail;

[0013] A traction rod is rotatably connected to the support plate. One end of the traction rod is connected to the center of the support plate, and the other end is connected to the clamping member. The traction rod is configured as a telescopic rod so that the clamping member always fits against the slide rail.

[0014] As a further improvement of one embodiment of the present invention, the traction rod includes an outer rod and an inner rod arranged in the axial direction of the traction rod. One end of the outer rod is connected to the center of the support plate, and the other end is provided with a telescopic groove extending in its axial direction. The inner rod slides through the telescopic groove, and a spring is provided in the telescopic groove. One end of the spring is connected to the end of the inner rod, and the other end is connected to the bottom wall of the telescopic groove.

[0015] As a further improvement of one embodiment of the present invention, the clamping member includes an inner clamping sleeve and an outer ring sleeve. The inner clamping sleeve and the outer ring sleeve are arranged in a concentric ring shape, and the inner clamping sleeve is rotatably connected to the outer ring sleeve. Along the axial direction of the clamping member, at least one end of the inner clamping sleeve extends to the outside of the outer ring sleeve. A transmission gear ring is provided on the outer periphery of the inner clamping sleeve located on the outside of the outer ring sleeve. A drive gear ring is provided on the outer periphery of the support disk, and the transmission gear ring meshes with the drive gear ring.

[0016] As a further improvement of one embodiment of the present invention, the power cable bending test device further includes an auxiliary component, which is disposed between the two sets of fixed components. The auxiliary component includes a through-hole block, which is rotatably disposed on the base and has a through hole for the cable to pass through.

[0017] As a further improvement of one embodiment of the present invention, the through block is configured as an elongated prism, and the through hole extends along the length direction of the through block.

[0018] As a further improvement of one embodiment of the present invention, the auxiliary component further includes a fixing block, the fixing block being provided with a receiving groove, the through block being rotatably disposed within the receiving groove, and a space for accommodating the cable being left between the outer periphery of the through block and the side wall of the receiving groove on the rotation path of the through block.

[0019] As a further improvement of one embodiment of the present invention, the through block is connected to a rotating shaft, the through block is connected to the fixed block through the rotating shaft, a torsion spring is provided at the mating point between the rotating shaft and the base, and a traction rope is connected between the rotating shaft and the movable fixed component. When the fixed component is close to the through block, the torsion spring is in a natural state, and the outer periphery of the through block is close to the side wall of the receiving groove.

[0020] Compared with the prior art, in this invention, when one fixing component is close to another fixing component, the cable bends at a non-fixed angle and bends at at least three locations (the connection points between the cable and the clamps in the two fixing components, and any location between the two fixing components).

[0021] When the clamping component moves to the corresponding convex and concave positions of the slide rail, the cable bends at different positions on the two fixed components. When the cable moves to the concave position, the bending angle between the two fixed components is smaller, achieving a small-angle bending test; when the cable moves to the convex position, the bending angle between the two fixed components is larger, achieving a large-angle bending test, which can meet the bending requirements of the cable during infrastructure construction.

[0022] Furthermore, when one set of fixing components moves away from the other set of fixing components, the cable is in a tensile state. Therefore, the bending test device of the present invention can not only perform bending tests on cables from multiple angles and positions, but also test the tensile state of the cables, enabling comprehensive and accurate testing of the cables. Attached Figure Description

[0023] Figure 1 This is a front view of a power cable bending test device provided by the present invention;

[0024] Figure 2 This is a front view of the fixing component in a power cable bending test device provided by the present invention;

[0025] Figure 3 This is a side view of the fixing component in one embodiment of the power cable bending test device provided by the present invention, wherein the clamping member is in cross-section.

[0026] Figure 4 This is a side view of the fixing component in another embodiment of the power cable bending test device provided by the present invention;

[0027] Figure 5 This is a cross-sectional view of the clamping component and the traction rod in a power cable bending test device provided by the present invention;

[0028] Figure 6This is an isometric view of the auxiliary components in the first state of a power cable bending test device provided by the present invention;

[0029] Figure 7 This is a top view of the auxiliary components in the second state of a power cable bending test device provided by the present invention.

[0030] Figure label:

[0031] 100. Cable; 10. Base; 20. First fixing component; 21. Ring frame; 211. Slide rail; 2111. Inner recess; 2112. Outer protrusion; 2113. Buffer part; 212. Support plate; 213. Traction rod; 2131. Outer rod; 2132. Inner rod; 2133. Telescopic groove; 2134. Spring; 214. Connecting seat; 215. Drive gear ring; 22. Clamping component; 221. Clamping through groove; 222. Inner sleeve; 223. Outer ring sleeve; 224. Transmission gear ring; 30. Second fixing component; 40. Winding guide frame; 50. Auxiliary component; 51. Through block; 511. Through hole; 52. Fixing block; 521. Receiving groove; 53. Rotating shaft; 54. Traction rope; 55. Torsion spring. Detailed Implementation

[0032] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] The terms used in this embodiment, such as "upper," "above," "lower," and "below," which indicate spatial relative positions, are used for ease of explanation to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms "spatial relative position" may be intended to include different orientations of the device besides those shown in the figures during use or operation. For example, in this embodiment, "upper," "lower," "left," "right," "horizontal," and "vertical" all refer to the spatial relative positions of the power cable bending test device under normal operating conditions.

[0034] The terms "first," "second," "third," "fourth," etc., used in this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Furthermore, it should be noted that, unless otherwise explicitly stated and limited, the term "connection" should be interpreted broadly. For example, a connection can be a direct connection or an indirect connection through an intermediate medium; it can be a fixed connection, a movable connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] To enable those skilled in the art to better understand the technical solutions in this invention, the length direction of the bending test device is defined as the first direction, the width direction as the second direction, and the height direction as the third direction. The first direction is perpendicular to the second direction, and the first and second directions are perpendicular to the third direction.

[0036] The following will refer to the appendix in the embodiments of the present invention. Figures 1 to 7 The technical solutions in the embodiments of the present invention will be clearly and completely described.

[0037] One embodiment of the present invention provides a power cable bending test device for performing bending tests on power cables, and of course, it can also be used to test other line products that require bending tests.

[0038] Reference Figure 1 The power cable bending test device includes a base 10 and a fixing component, which is mounted on the base 10.

[0039] The base 10 can be configured as a plate-shaped or block-shaped support structure, or as a workbench or other structure.

[0040] The fixing assembly includes a ring frame 21 and a clamping member 22. The ring frame 21 is provided with a slide 211 forming a preset movement path. The clamping member 22 is movably connected to the slide 211 along the preset movement path, that is, the clamping member 22 is configured to move on the slide 211. The clamping member 22 has a clamping slot 221 extending along its length, which is used for threading and fixing the cable 100.

[0041] In some embodiments, the clamping member 22 is configured as an elongated cylindrical structure, and the clamping through groove 221 extends along the axial direction of the clamping member 22.

[0042] In some embodiments, the sidewalls of the clamping slot 221 or the two ends of the clamping member 22 are provided with structures for clamping the cable 100, such as elastic engaging members or clamping plates whose positions are adjustable in the radial direction of the clamping member 22.

[0043] There are two sets of fixing components, which are arranged opposite to each other. At least one set of fixing components is movably mounted on the base 10 along a straight moving path. The two sets of fixing components are referred to as the first fixing component 20 and the second fixing component 30, respectively.

[0044] In some embodiments, one set of fixing components is movably disposed on the base 10 along a straight movement path, and as one set of fixing components moves along the straight movement path, one set of fixing components moves closer to or further away from the other set of fixing components. As an example, the first fixing component 20 is slidably disposed on the base 10, and the second fixing component 30 is fixedly disposed on the base 10.

[0045] In some embodiments, two sets of fixing components are movably disposed on the base 10 along a linear movement path, with the two sets of fixing components moving in opposite directions. As an example, the first fixing component 20 and the second fixing component 30 are slidably disposed on the base 10. The linear movement path extends along a first direction.

[0046] When the first fixing component 20 moves along the straight movement path, it moves back towards or away from the second component. Alternatively, when the first fixing component 20 and the second fixing component 30 move toward or away from each other along the straight movement path, they either move closer together or move further apart.

[0047] When the first fixing component 20 is close to the second fixing component 30, the cable 100 bends at an angle that is not fixed, and bends occur at at least three locations (the connection between the cable 100 and the clamping member 22 on the first fixing component 20, the connection between the cable 100 and the clamping member 22 on the second fixing component 30, and any position of the cable 100 between the two fixing components). In this invention, the bending angle of the cable 100 is 180° to 360°. When the bending angle of the cable 100 is 180°, the cable 100 is straight. When the bending angle of the cable 100 is 360°, the two sides of the cable 100 at the bend are close together or very close to being close together.

[0048] Furthermore, when the first fixing component 20 moves away from the second fixing component 30, or when the first fixing component 20 and the second fixing component 30 move synchronously in opposite directions, the cable 100 is in a tensile state. Therefore, the bending test device of the present invention can not only perform bending tests on the cable 100 at multiple angles and positions, but also test the tensile state of the cable 100, enabling comprehensive and accurate testing of the cable 100.

[0049] The fixed component can be driven by a linear drive structure, such as an electric cylinder, a gear rack, or a lead screw. This embodiment does not impose any specific limitations on this.

[0050] A winding guide 40 is provided on the base 10, which is used for winding and pulling the cable 100. The winding guide 40 includes a vertical pole and a winding wheel rotatably mounted on the vertical pole, on which the cable 100 is wound. The winding guide 40 is located on one side of one set of fixing components opposite to the other set of fixing components.

[0051] In some embodiments, only one set of winding guides 40 is provided. For example, the winding guides 40 are provided on the side of the first fixing component 20 opposite to the second fixing component 30.

[0052] In some embodiments, two sets of winding guides 40 are provided, and the two sets of winding guides 40 are respectively located on opposite sides of the two sets of fixing components.

[0053] During the movement of the fixed component, the cable 100 can be released or tightened to allow the fixed component to smoothly carry out the winding test with the cable 100.

[0054] Reference Figure 2 The ring frame 21 includes a support plate 212, which is fixed to the base 10. The axial direction of the support plate 212 extends along a first direction. The outer periphery of the support plate 212 is configured as a slide rail 211, that is, the clamping member 22 cooperates with the outer periphery of the support plate 212, and the clamping member 22 can move along a preset moving path formed by the outer periphery of the support plate 212. A connecting seat 214 is slidably disposed on the base 10 along a linear moving path, and the support plate 212 is fixedly connected to the connecting seat 214.

[0055] The support disk 212 can be configured as a disc or a fragmented disc.

[0056] In some implementations, refer to Figure 3 If the support plate 212 is set as a disc-shaped structure, then the slide 211 extends along the arc direction, and the arc is set as a positive circle.

[0057] In some implementations, refer to Figure 4 The support plate 212 is set as a broken disc shape.

[0058] The defective disk can be understood as a part of a perfect circle. At least part of the outer periphery of the defective disk is inscribed in a perfect circle, and the projection of the remaining outer periphery along the axial direction is located within the perfect circle. The defective disk is set as an irregular structure, and the shape of the specific support disk 212 can be specifically set according to the bending test angle required by the cable 100.

[0059] As an example, in this embodiment, the support disk 212 is configured as a fragmented disk, with one portion of the support disk 212 protruding outward and another portion recessed inward in the radial direction. That is, the slide 211 includes an inner concave portion 2111 near the center of the ring frame 21, an outer convex portion 2112 away from the center of the ring frame 21, and a buffer portion 2113 connecting the inner concave portion 2111 and the outer convex portion 2112. The inner concave portion 2111, the outer convex portion 2112, and the buffer portion 2113 are all arc-shaped.

[0060] The distance between the concave portion 2111 and the center of the ring frame 21 is less than the distance between the convex portion 2112 and the center of the ring frame 21. The buffer portion 2113 is an arc connecting the concave portion 2111 and the convex portion 2112. The ratio between the closest distance L1 between the concave portion 2111 and the center of the ring frame 21 and the farthest distance L2 between the convex portion 2112 and the center of the ring frame 21 is in the range of 1:1.5 to 4.

[0061] The greater the ratio between the closest distance L1 between the concave portion 2111 and the center of the ring frame 21 and the farthest distance L2 between the convex portion 2112 and the center of the ring frame 21, the greater the bending angle of the cable 100 when the two sets of fixing components are far apart.

[0062] The center of the ring frame 21 and the center of the support disk 212 are at the same center point. This center point is set as the geometric center of the support disk 212. If the support disk 212 is a perfect circular disk, then the geometric center is the center of the circle of the support disk 212; if the support disk 212 is a broken circular disk, then the geometric center is the center of the largest circumscribed circle of the support disk 212.

[0063] In some embodiments, the concave portion 2111 and the convex portion 2112 are respectively provided at both ends of the radial direction of the support disk 212.

[0064] In some embodiments, the orientation of the support disks 212 in the two fixing components is set to be centrally symmetrical, that is, in the horizontal direction, the outward convex portion 2112 of the support disk 212 in the first fixing component 20 corresponds to the inward concave portion 2111 of the support disk 212 in the second fixing component 30, and the inward concave portion 2111 of the support disk 212 in the first fixing component 20 corresponds to the outward convex portion 2112 of the support disk 212 in the second fixing component 30.

[0065] Therefore, when the two clamping members 22 move to the positions of the protruding portions 2112 of the two support plates 212 respectively, with the first fixing component 20 and the second fixing component 30 moving away from each other, the cable 100 can achieve a stretched state at a certain angle, and the bending angle of the cable is larger, which can realize the tensile test of the cable 100 in the bending state, meet the bending requirements of the cable in the infrastructure construction process, and realize the large-angle bending test of the cable. Since the concave portion 2111 is closer to the center point of the ring frame 21, it is convenient for operators to thread the cable 100.

[0066] In the cable bending test device provided by this invention, when the two clamping members 22 move to the positions corresponding to the outward protrusion 2111 and the inward concave portion 2112 of the slide 211, the cable 100 is in different positions on the two fixing components, and the bending angle of the cable 100 is also different. When the two clamping members 22 move to the position of the inward concave portion 21122, the bending angle of the cable 100 between the two fixing components is small, realizing a small-angle bending test; when the two clamping members 22 move to the position of the outward protrusion 2111, the bending angle of the cable 100 between the two fixing components is large, realizing a large-angle bending test, which can meet the bending requirements of the cable 100 during infrastructure construction.

[0067] In some embodiments, the recessed portion 2111 and the convex portion 2112 on the support disc 212 of the two fixing components correspond to each other in the horizontal direction.

[0068] Reference Figure 5 The ring frame 21 also includes a traction rod 213, which is rotatably connected to the support plate 212. One end of the traction rod 213 is connected to the center of the support plate 212, and the other end is connected to the clamping member 22.

[0069] In some embodiments, a rotating shaft is rotatably connected to the center of the support disk 212, and one end of the traction rod 213 is fixedly connected to the rotating shaft. The rotating shaft can be driven to rotate by a drive motor and gear structure, or other structures that achieve mechanical rotation, which will not be described in detail in this embodiment.

[0070] It should be noted that the traction rods 213 in the two sets of fixing components are driven independently, that is, the rotation angles of the two traction rods 213 can be the same or different. The specific rotation angle of the traction rods 213 is configured according to the specific test angle required by the cable 100.

[0071] The traction rod 213 is configured as a telescopic rod so that the clamping member 22 always fits against the slide rail 211. The traction rod 213 may be configured as a round rod or a square rod, for example.

[0072] The traction rod 213 includes an outer rod 2131 and an inner rod 2132. The outer rod 2131 and the inner rod 2132 are arranged along the axial direction of the traction rod 213. One end of the outer rod 2131 is connected to the center of the support plate 212, and the other end is provided with a telescopic groove 2133 extending along its axial direction. That is, the end of the outer rod 2131 facing the center of the support plate 212 is fixedly connected to the rotating shaft, and the telescopic groove 2133 at the other end is open to the inner rod 2132.

[0073] The inner rod 2132 slides through the telescopic groove 2133. A spring 2134 is installed inside the telescopic groove 2133, with one end connected to the end of the inner rod 2132 and the other end connected to the bottom wall of the telescopic groove 2133. When the traction rod 213 moves the clamping member 22 to the position of the concave portion 2111, the spring 2134 is in a first stretched state. When the traction rod 213 moves the clamping member 22 to the position of the convex portion 2112, the spring 2134 is in a second stretched state. The elastic potential energy of the spring 2134 in the second stretched state is greater than that in the first stretched state.

[0074] Under the action of the elastic potential energy of the spring 2134, the clamping member 22 can always be in contact with the outer periphery of the support plate 212, that is, the traction rod 213 can drive the clamping member 22 to always cooperate with the slide 211. During the displacement of the two sets of fixed components, the clamping member 22 can move on the incomplete circular slide 211 to realize the bending test of the cable at more than 100 angles.

[0075] As a further limitation, the clamping member 22 includes an inner clamping sleeve 222 and an outer ring sleeve 223, both of which are elongated rings. The channel formed by the inner clamping sleeve 222 is the clamping groove 221. The inner clamping sleeve 222 and the outer ring sleeve 223 are concentrically ringed, and the inner clamping sleeve 222 is rotatably connected to the outer ring sleeve 223. To make the connection between the inner clamping sleeve 222 and the outer ring sleeve 223 more reliable, an engaging structure can be provided between the inner clamping sleeve 222 and the outer ring sleeve 223.

[0076] Along the axial direction of the clamping member 22, at least one end of the inner clamping sleeve 222 extends to the outside of the outer ring sleeve 223. As an example, in this embodiment, both ends of the inner clamping sleeve 222 extend to the outside of the outer ring sleeve 223. In an alternative embodiment, only one end of the inner clamping sleeve 222 extends to the outside of the outer ring sleeve 223.

[0077] The inner sleeve 222 is provided with a transmission gear ring 224 on its outer periphery outside the outer ring sleeve 223, meaning that the two ends of the inner sleeve 222 are respectively fixedly connected to the transmission gear ring 224. The outer periphery of the support plate 212 is provided with a drive gear ring 215, and the transmission gear ring 224 meshes with the drive gear ring 215. Correspondingly, each set of fixing components is provided with two parallel support plates 212, which are spaced apart. The distance between the two transmission gear rings 224 is the same as the distance between the two support plates 212, so that the two transmission gear rings 224 match the transmission gear rings 224 on the two support plates 212.

[0078] As the traction rod 213 drives the clamping member 22 to rotate, the transmission gear ring 224 rotates under the meshing action of the drive gear ring 215. The transmission gear ring 224 drives the inner clamping sleeve 222 to rotate, and the clamping member 22 rotates on its own axis during its revolution. The inner clamping sleeve 222 drives the cable 100 to rotate on its own axis.

[0079] In some embodiments, the tooth spacing of the transmission gear ring 224 and the drive gear ring 215 in the two sets of fixed components is different, so that the rotation angle of the cable 100 in the two sets of fixed components is different, and the cable 100 can be twisted. This allows for simultaneous testing of whether there are quality problems such as power transmission in the cable 100 under twisted state, making the detection of the cable 100 more accurate.

[0080] In some embodiments, the tooth spacing of the transmission gear ring 224 and the drive gear ring 215 in the two sets of fixing components is the same. When the clamping members 22 on the two sets of fixing components move to different positions, the cable 100 can also be twisted at different angles at the holding points of the two clamping members 22, so as to test the torsion state of the cable 100.

[0081] As a further limitation, refer to Figure 1 , Figures 6 to 7 The power cable bending test device also includes an auxiliary component 50, which is disposed between two sets of fixed components. The auxiliary component 50 includes a through-hole block 51, which is rotatably mounted on the base 10. The through-hole block 51 has a through hole 511 for the cable 100 to pass through. The through-hole block 51 can bend the cable 100 between the two sets of fixed components to perform a more comprehensive and accurate bending test on the cable 100.

[0082] Reference Figure 6 The insertion block 51 is configured as a long strip prism, and the through hole 511 extends along the length of the insertion block 51. The edges at both ends of the insertion block 51 are folded surfaces. The cable 100 is inserted into the insertion block 51. After the insertion block 51 is rotated, the cable 100 will bend and wrap around the outer periphery of the insertion block 51. Since the edges of the insertion block 51 are folded surfaces, the bending angle of the cable 100 is also a continuous right angle, so as to realize the test of the cable 100 under continuous multiple bending conditions.

[0083] The auxiliary component 50 also includes a fixing block 52, which is fixedly mounted on the base 10. The fixing block 52 is provided with a receiving groove 521. The through-hole block 51 is rotatably disposed within the receiving groove 521. Along the rotation path of the through-hole block 51, a space is left between the outer periphery of the through-hole block 51 and the side wall of the receiving groove 521 to accommodate the cable 100. During the rotation of the through-hole block 51 and the cable 100, the cable 100 will fit more closely to the outer periphery of the through-hole block 51 under the limiting effect of the receiving groove 521, making the testing more accurate.

[0084] The through block 51 is connected to a rotating shaft 53, and the through block 51 is connected to the fixed block 52 via the rotating shaft 53. A torsion spring 55 is provided at the mating point between the rotating shaft 53 and the base 10. A support block (not shown) for supporting the auxiliary component 50 can be provided on the base 10. The rotating shaft 53 is rotatably connected to the support block. A torsion spring 55 is provided at the mating point between the rotating shaft 53 and the support block. A traction rope 54 is connected between the rotating shaft 53 and the movable fixed component. When the fixed component is close to the through block 51, the torsion spring 55 is in its natural state, and the outer periphery of the through block 51 is close to the side wall of the receiving groove 521.

[0085] The support block may be provided with a groove that mates with one end of the torsion spring 55, and the rotating shaft 53 may be provided with a locking protrusion that mates with the other end of the torsion spring 55. When the rotating shaft 53 is rotated by the traction force of the traction rope 54, the torsion spring 55 is subjected to a torsional force. After the traction rope 54 is released, the rotating shaft 53 rotates back to its original position under the action of the elastic torsional force of the torsion spring 55. Therefore, during the movement of the fixing component, the threading block 51 can drive the cable 100 to reciprocate and bend.

[0086] In some implementations, if only one set of movable fixing components is provided, for example, the first fixing component 20 is set to be movable, then one end of the traction rope 54 is fixedly connected to the connecting seat 214 in the first fixing component 20, and the other end is fixedly connected to the side surface of the rotating shaft.

[0087] In some embodiments, if both sets of fixing components are movable, two traction ropes 54 are provided, which are respectively connected between the first fixing component 20 and the rotating shaft 53, and between the second fixing component 30 and the rotating shaft 53. The two traction ropes 54 are wound in opposite directions to the rotating shaft 53 to avoid interference of traction forces when the two sets of fixing components move synchronously.

[0088] It should be noted that, in the natural state of the torsion spring 55, at least a portion of the traction rope 54 is wrapped around the outer peripheral wall of the rotating shaft 53, so that the fixing component can smoothly drive the rotating shaft 53 to rotate during the movement.

[0089] In some embodiments, the auxiliary component 50 is movably disposed on the base 10. For example, the auxiliary component 50 may be disposed on a bidirectional drive structure extending along the width and height directions, allowing the auxiliary component 50 to be displaced in a second direction and a third direction upwards. When the auxiliary component 50 is displaced in the second direction, the auxiliary component 50 can selectively avoid being positioned relative to the fixing components. A bending test on the cable 100 can be performed using only two sets of fixing components, or a bending test can be performed simultaneously using two sets of fixing components and the auxiliary component 50. When the auxiliary component 50 is displaced in a third direction upwards, the angle between the cable 100 and the clamping member 22 can be adjusted, further enabling multi-angle bending tests on the cable 100.

[0090] In some embodiments, the rotation drive of the rotating shaft 53 is independent of the displacement of the fixed component. A drive motor may be provided on the base 10, and the drive motor drives the rotating shaft 53 to rotate through transmission components (such as gears, pulleys, etc.).

[0091] The bending test process of the power cable 100 bending test device of the present invention is described in detail below:

[0092] Adjust the two fixing components to their initial positions, which can be the middle position of the linear movement path. Pass the cable 100 sequentially through and fix it to the clamping member 22 of the first fixing component 20, the passing block 51, and the clamping member 22 of the second fixing component 30. Leave a certain length of cable 100 on each of the two fixing components on opposite sides; the reserved length of cable 100 can be wound onto a winding wheel.

[0093] The cable 100 is driven to move along a straight path. When the two sets of fixed components approach each other, the cable 100 will bend at the clamping part 22 of the first fixed component 20, the clamping part 22 of the second fixed component 30, and the middle position of the cable 100, allowing for simultaneous bending tests on multiple positions of the cable 100. When the two sets of fixed components move away from each other, the cable 100 will stretch under the action of traction force, allowing for tensile tests on the cable 100.

[0094] During the displacement of the drive component, the traction rod 213 is driven to rotate synchronously. The traction rod 213 drives the clamping member 22 to move on the slide rail 211. During the displacement, the clamping member 22 will drive the cable 100 to rotate in the circumferential direction. The rotation angles on the two sets of fixed components are different, causing the cable 100 to twist. A torsion test can be performed on the cable 100.

[0095] When the two sets of fixing components move away from the insertion block 51, the traction rope 54 will generate a traction force on the rotating shaft 53, causing the rotating shaft 53 to rotate. The insertion block 51 drives the cable 100 to rotate. The cable 100 cooperates with the outer periphery of the insertion block 51 and the receiving groove 521, thereby enabling a further bending test on the cable 100 between the two sets of fixing components.

[0096] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A power cable bending test device, characterized in that, include: A base (10) is provided with a winding guide (40) for winding and pulling cables; A fixing component is disposed on the base (10). The fixing component includes a ring frame (21) and a clamping member (22). The ring frame (21) is provided with a slide (211) forming a preset moving path. The clamping member (22) is movably connected to the slide (211) along the preset moving path. The clamping member (22) has a clamping through groove (221) extending along its length for threading a cable (100). The slide (211) includes an inner concave portion (2111) near the center of the ring frame (21) and an outer convex portion (2112) away from the center of the ring frame (21). The fixing components are provided in two sets, at least one set of the fixing components is movably disposed on the base (10) along a straight moving path, and when one set of the fixing components moves along the straight moving path, one set of the fixing components is close to or away from the other set of the fixing components. The winding guide (40) is disposed on one side of one set of the fixing components opposite to the other set of the fixing components; The slide (211) further includes a buffer portion (2113) connecting the concave portion (2111) and the convex portion (2112), wherein the concave portion (2111), the convex portion (2112), and the buffer portion (2113) are all arc-shaped; the ratio between the closest distance between the center of the concave portion (2111) and the center of the ring frame (21) and the farthest distance between the center of the convex portion (2112) and the center of the ring frame (21) is in the range of 1:1.5~4; The ring frame (21) includes: A support plate (212) is fixed to the base (10), and the outer periphery of the support plate (212) is configured as the slide (211); A traction rod (213) is rotatably connected to the support plate (212). One end of the traction rod (213) is connected to the center of the support plate (212), and the other end is connected to the clamping member (22). The traction rod (213) is configured as a telescopic rod so that the clamping member (22) always fits against the slide rail (211).

2. The power cable bending test device according to claim 1, characterized in that, The traction rod (213) includes an outer rod (2131) and an inner rod (2132) arranged in the axial direction of the traction rod (213). One end of the outer rod (2131) is connected to the center of the support plate (212), and the other end is provided with a telescopic groove (2133) extending in its axial direction. The inner rod (2132) slides through the telescopic groove (2133). A spring (2134) is provided in the telescopic groove (2133). One end of the spring (2134) is connected to the end of the inner rod (2132), and the other end is connected to the bottom wall of the telescopic groove (2133).

3. The power cable bending test device according to claim 2, characterized in that, The clamping member (22) includes an inner clamping sleeve (222) and an outer ring sleeve (223). The inner clamping sleeve (222) and the outer ring sleeve (223) are arranged in a concentric ring shape, and the inner clamping sleeve (222) is rotatably connected to the outer ring sleeve (223). Along the axial direction of the clamping member (22), at least one end of the inner clamping sleeve (222) extends to the outside of the outer ring sleeve (223). A transmission gear ring (224) is provided on the outer periphery of the inner clamping sleeve (222) located outside the outer ring sleeve (223). A drive gear ring (215) is provided on the outer periphery of the support disk (212), and the transmission gear ring (224) meshes with the drive gear ring (215).

4. The power cable bending test device according to claim 3, characterized in that, The power cable bending test device also includes an auxiliary component (50), which is disposed between the two sets of fixed components. The auxiliary component (50) includes a through block (51), which is rotatably disposed on the base (10). The through block (51) is provided with a through hole (511) for the cable (100) to pass through.

5. The power cable bending test device according to claim 4, characterized in that, The through block (51) is configured as a long strip prism, and the through hole (511) extends along the length direction of the through block (51).

6. The power cable bending test apparatus according to claim 5, characterized in that, The auxiliary component (50) also includes a fixing block (52), which is provided with a receiving groove (521). The through block (51) is rotatably disposed in the receiving groove (521). On the rotation path of the through block (51), there is a space for accommodating the cable (100) between the outer periphery of the through block (51) and the side wall of the receiving groove (521).

7. The power cable bending test apparatus according to claim 6, characterized in that, The through block (51) is connected to a rotating shaft (53), and the through block (51) is connected to the fixed block (52) through the rotating shaft (53). A torsion spring (55) is provided at the mating point between the rotating shaft (53) and the base (10). A traction rope (54) is connected between the rotating shaft (53) and the movable fixed component. When the fixed component is close to the through block (51), the torsion spring (55) is in a natural state, and the outer periphery of the through block (51) is close to the side wall of the receiving groove (521).

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