Testing device of cable for direct current charging pile
By designing a testing device for cables used in DC charging piles, and combining torsion and tension devices, the problem of inaccurate cable testing was solved. This enabled multi-condition simulation testing of cables, improving the stability and accuracy of testing, and making it suitable for evaluating different types of cables.
Patent Information
- Application Number
- CN202422793017.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-15
AI Technical Summary
In the existing technology, the testing methods for DC charging pile cables cannot accurately simulate the torsion and stretching conditions during actual use, resulting in discrepancies between the test results and the actual service life.
A testing device for DC charging pile cables was designed, comprising a support, a torsion device, and a tensioning device. The torsion motor and tensioning device simulate the torsion and tension of the cable. Combined with components such as guide rails and sliding blocks, the device enables precise control and fixation of the cable, adapting to the testing of different cable models.
It enables multi-condition simulation testing of cables, improves the stability and accuracy of testing, reduces errors, is suitable for large-scale cable performance evaluation, and ensures the durability and safety of cables in actual use.
Smart Images
Figure CN223500787U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a testing device for cables used in DC charging piles, belonging to the field of charging pile cable technology. Background Technology
[0002] With the rapid development of new energy vehicles, the market demand for DC charging piles, as key equipment for providing power to electric vehicles, is constantly increasing. In the entire DC charging pile system, the charging cable is a crucial channel for transmitting electrical energy. The overall quality of the charging cable affects charging efficiency, charging safety, and the overall stability of the system. The cables used in charging piles face challenges of high current and high voltage in actual use environments and are often exposed outdoors. The cable body is prone to aging and mechanical damage, affecting the safety and lifespan of the charging pile.
[0003] Currently, cable quality testing typically involves static parameter measurements. The conclusions drawn from tests conducted in a static environment differ from the actual lifespan of cables in real-world use. After prolonged use, cables experience performance degradation due to high temperatures, bending, and other factors. Current cable testing equipment has limitations; most measurements are static and cannot simulate the tensile and torsional conditions experienced by cables during actual use. Therefore, a design is needed specifically for DC charging pile cables to simulate the number of times these cables undergo torsion and tension during actual use. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a testing device for cables used in DC charging piles, which solves the problem of inaccurate testing of cables for DC charging piles.
[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: A testing device for cables used in DC charging piles, comprising...
[0006] Support, torsion device, tension device,
[0007] Both the tensioning device and the torsion device are mounted on the bracket.
[0008] The torsion device is located at the top of the support, and the tensioning device is bolted to the middle of the support. The position of the tensioning device on the support can be adjusted.
[0009] The tensioning device includes a fixing block and a slide rail. The bottom of the slide rail is connected to the bracket, and the fixing block is provided on the top of the slide rail.
[0010] The torsion device includes a torsion motor, a torsion rod, and a torsion disc. The top of the bracket is provided with a hole to accommodate the torsion rod. The torsion motor is provided at one end of the torsion rod, and the torsion disc is provided at the other end of the torsion rod.
[0011] The center of the torsion disc and the center of the fixed block are on the same straight line;
[0012] The fixing block can move along the slide rail, and a hole for fixing the cable to be tested is provided in the middle of the fixing block;
[0013] The torsion motor can rotate the torsion rod, thereby driving the torsion disc to rotate.
[0014] Preferably, the torsion disk is provided with a torsion assembly, which includes a guide rail, a sliding block, a torsion block, a drive block, and a locking block. The guide rail is disposed at both ends of the sliding block, and the sliding block has a hole in the middle to accommodate the torsion block. The torsion block is fixed in the middle of the sliding block. The drive block is connected to the torsion block, and the drive block has a hole in the middle to accommodate the locking block. The torsion block is provided with the locking block.
[0015] The sliding block can move along the guide rail, and the driving block can drive the torsion block to rotate.
[0016] The torsion assembly can fix the cable to be tested and apply torque to the cable.
[0017] Preferably, the locking block is a semi-circular ring structure, and there are two locking blocks, one of which has a fixing key in the middle of the outer side of the ring.
[0018] Preferably, a fixing pin is provided in the middle of the torsion block, and the torsion block and the locking block are connected by the fixing pin and the fixing key, so that no rotational misalignment occurs.
[0019] Preferably, the inner side of the locking block ring has multiple teeth arranged, and the two locking blocks combined can fix the cable to be tested.
[0020] Preferably, the inner ring of the locking block has various sizes to secure cables of different diameters.
[0021] Preferably, one end of the drive block is connected to a motor, which provides power.
[0022] Preferably, the torsion assembly is capable of reciprocating from the edge of the torsion disk to the center of the torsion disk via the guide rail.
[0023] The beneficial effects of this utility model are:
[0024] (1) Through this utility model, a torsion device is set at the top of the bracket and a tensioning device is set in the middle of the bracket. The torsion device can torsion the cable, and the torsioned cable can be stretched by the tensioning device. It can perform joint torsion and tension tests on the cable, simulate the use under various working conditions, and thus more comprehensively evaluate the durability and other performance of the cable.
[0025] (2) Through this utility model, the tensioning device set in the middle of the bracket can adjust the position on the bracket. In the torsion device and tensioning device set at the top of the bracket, the centers of the torsion disc of the torsion device and the fixing block of the tensioning device are on the same straight line. The tensioning device set in the middle of the bracket is fixed to the bracket by bolts. Contact bolt locking allows it to be moved to a new position and fixed with bolts again. The distance between the torsion device and the tensioning device can be adjusted according to the length of the cable being measured. In different models of charging piles, the test lengths are inconsistent. By adjusting the distance between the torsion device and the tensioning device, different models of cables can be adapted. After the position is adjusted, the centers of the torsion disc and the fixing block of the torsion device and the tensioning device are on the same straight line, which can reduce the error caused by multiple experiments.
[0026] (3) This utility model provides a torsion assembly inside the torsion disc, which includes a guide rail, a sliding block, a torsion block, a drive block, and a locking block. Through the cooperation of the guide rail and the sliding block, the torsion assembly can move smoothly along the guide rail, ensuring precise control during the torsion process, avoiding additional friction and shaking, and improving the stability of the test and the accuracy of the data; the locking block in the middle of the drive block can fix the cable and prevent accidental rotation, thereby ensuring the safety of the cable during the operation before and after the test; the drive block drives the automatic rotation of the torsion block, reducing manual intervention, improving test efficiency, and is suitable for large-scale, multi-batch cable torsion performance testing. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of this utility model;
[0028] Figure 2 This is a side view of the present invention.
[0029] Figure 3 This is a schematic diagram of the torsion assembly of this utility model;
[0030] Figure 4 This is a schematic diagram of the torsion block in the torsion assembly of this utility model.
[0031] In the diagram: 1-bracket, 2-torsion device, 21-torsion motor, 22-torsion rod, 23-torsion disc, 231-sliding block, 232-torsion block, 233-drive block, 234-locking block, 3-tensioning device, 31-slide rail, 32-fixed block. Detailed Implementation
[0032] In order to make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0033] Example 1
[0034] like Figures 1-4 As shown, a testing device for a DC charging pile cable includes a support 1, a torsion device 2, and a tension device 3, wherein the torsion device 2 is provided at the top of the support 1, and the tension device 3 is provided in the middle of the support 1.
[0035] In this embodiment, the bracket 1 is L-shaped, with the horizontal portion longer than the vertical portion. Multiple screw holes are provided on the horizontal bracket 1 to secure the tensioning device 3. A hole for accommodating the torsion device 2 is provided at the top edge of the vertical bracket 1, and the torsion device 2 is fixed within the vertical hole of the bracket 1.
[0036] The tensioning device 3 includes a slide rail 31 and a fixing block 32. A platform is provided at the bottom of the slide rail 31, and bolts are installed at the bottom of the platform. The bolts can mate with screw holes in the horizontal direction of the bracket 1, fixing the device horizontally. A fixing block 32 is provided at the top of the slide rail 31, and a moving motor is installed inside the fixing block 32. The fixing block 32 moves along the slide rail 31 via the moving motor. In this embodiment, the slide rail 31 has a rectangular structure with an inwardly recessed top and inwardly recessed grooves on both sides. The shape of the bottom of the fixing block 32 at the connection point with the slide rail 31 is consistent with the overall shape of the slide rail 31. The bottom of the fixing block 32 only covers the bottom of the groove on the side of the slide rail 31, and is not in the same plane as the bottom of the slide rail 31, thus not contacting the platform at the bottom of the slide rail 31, reducing wear. A through-hole is provided inside the slide rail 31, and the slide rail 31 is fixed to the bottom platform with bolts.
[0037] The top of the fixing block 32 is provided with a fixing structure for fixing the cable, specifically two forward-protruding semicircular rings that can be connected to each other to fix the cable. The center of the connected semicircular rings is on the same axis as the center of the torsion device 2.
[0038] The torsion device 2 includes a torsion motor 21, a torsion rod 22, and a torsion disc 23. The torsion device 2 is fixed to a bracket 1. A hole for accommodating the torsion device 2 is provided at the top edge of the bracket 1 in the vertical direction, allowing the torsion rod 22 to be fixed within the hole at the top of the bracket 1. In the torsion device 2, the torsion rod 22 is fixed within the hole at the top of the bracket 1. A torsion disc 23 is located at one end of the torsion rod 22 near the tensioning device 3, and a torsion motor 21 is located at the other end of the torsion rod 22 away from the tensioning device 3. The torsion rod 22 and the torsion disc 23 are fixedly connected, and the torsion disc 23 rotates with the torsion rod 22. The torsion motor 21 drives the torsion rod 22 to rotate. The center of the torsion disc 23 is on the same axis as the center of the fixing block 32 of the tensioning device 3.
[0039] The torsion disc 23 is equipped with a torsion assembly inside. The torsion assembly can move from the edge of the torsion disc 23 to the center. When the torsion disc 23 rotates, it can drive the torsion assembly to rotate along the edge of the torsion disc 23. The torsion assembly can fix the cable and rotate the fixing point to apply torque to the cable.
[0040] The torsion assembly includes a guide rail, a sliding block 231, a torsion block 232, a drive block 233, and a locking block 234. There are two guide rails, and grooves for accommodating the guide rails are provided on both sides of the sliding block 231. The torsion block 232 is located in the middle of the sliding block 231 and protrudes slightly. A drive block 233 is located in the protruding part of the torsion block 232, which can drive the torsion block 232 to rotate. A locking block 234 is located inside the torsion block 232, which can connect to a cable and fix the cable to the middle of the sliding block 232. By driving the torsion block 232 to rotate on the sliding block 231 via the drive block 233, the cable can be rotated, and a certain torque can be provided to the cable.
[0041] In this embodiment, the bottom ends of both sides of the slide rail are recessed inward, and both ends of the sliding block 231 can be connected to the guide rail and move on the guide rail. The sliding block 231 is generally H-shaped, with grooves on both sides for connecting to the guide rail. A reciprocating motor is installed inside the sliding block 231, which can adjust the position of the sliding block 231 on the guide rail. The guide rail is fixed inside the torsion disk 23 and located at the radius of the torsion disk 23; the sliding block 231 can move on the guide rail, driving the torsion assembly to move from the edge of the torsion disk 23 to the center of the torsion disk 23, and can reciprocate.
[0042] Reference Figure 4A hole for accommodating a torsion block 232 is provided in the middle of the sliding block 232. The torsion block 232 is cylindrical, and multiple protruding teeth are provided on the outer side of the cylinder, covering half of the outer side of the torsion block 232. A fixing pin is provided at the edge of the hole in the middle of the torsion block; the hole can accommodate a locking block 234. In this embodiment, there is one fixing pin. The side of the torsion block 232 without teeth is fixed to the middle of the sliding block 231, and the sliding block 231 does not rotate when the torsion block 232 rotates.
[0043] The torsion block 232, which is not fixed to the outside of the sliding block 231, is connected to the drive block 233, which provides rotational power to the torsion block 232. In this embodiment, a motor is connected to the top of the drive block 233, and the motor drives the drive block 233 to rotate, thus providing power.
[0044] A locking block 234 is provided in the middle of the torsion block 232. The locking block 234 can connect to the cable and fix the cable to the torsion block 232. In this embodiment, the locking block 234 is a semi-circular ring structure, and there are two locking blocks 234. When the locking blocks 234 are connected, they form a ring, and the cable to be tested can be fixed inside the ring. Multiple teeth are arranged on the inner surface of the locking block 234. The locking block 234 fixes the cable through the inner teeth. When torque is applied to the cable, the teeth can prevent the cable from rotating accidentally, ensuring the safety of the cable during operation before and after testing.
[0045] One of the locking blocks 234 has a fixing key in the middle of the outer ring. The fixing key can be connected with the fixing pin in the middle of the torsion block 232 to prevent rotational misalignment.
[0046] The produced cables come in various models, some with different sizes. The locking block 234 also comes in various models, with different inner diameters of the rings and the same outer diameter. All can be fixed inside the torsion block 232. Different models of locking blocks 234 can fix cables of different diameters to be tested.
[0047] One end of the cable is fixed to the torsion device 2, and the other end of the cable is fixed to the tension device 3. Through the cooperation of the torsion device 2 and the tension device 3 set on the bracket 1, the cable can be stretched and torsiond, and the force on the cable during actual use can be measured.
[0048] By testing the cable, we can determine its service life after being stretched and twisted, and judge whether the cable meets the production requirements.
[0049] The specific testing method is as follows:
[0050] Step 1: Set the fixing block 32 on the side of the slide rail 31 away from the torsion device 2;
[0051] Step 2: Place the torsion assembly in the center of the torsion disc 23;
[0052] Step 3: Confirm the length of the cable to be tested, and adjust the position of the tensioning device 3 on the bracket 1 so that the distance between the tensioning device 1 and the torsion device 2 is the length of the cable to be tested.
[0053] Step 4: Fix one end of the cable to be tested in the middle of the fixing block 32, and fix the other end in the torsion assembly by the locking block 234;
[0054] Step 5: Move the fixing block 32 to the side of the slide rail close to the torsion device 2;
[0055] Step 6: Move the torsion assembly to the edge of the torsion disc 23;
[0056] Step 7: The torsion motor 31 drives the torsion disk 23 to rotate, and stops rotating after rotating at least half a turn. The torsion assembly moves to the middle of the torsion disk 23.
[0057] Step 8: Move the fixed block 32 to the side of the slide rail away from the torsion device 2.
[0058] In step 7, the drive block 233 continuously drives the torsion block 232 to rotate along the rotation direction of the torsion disk 23.
[0059] Step 7 involves twisting the cable under test, followed by stretching it in step 8. After the cable is manufactured, its quality needs to be measured according to applicable quality standards. In this embodiment, the motor connected to the drive block 233 can adjust the set torque, and the motor inside the fixing block 32 can adjust the output tension. This ensures that the cable meets the production requirements for quality testing, preventing misjudgments caused by excessive output torque or tension, which could affect the testing quality and allow for a more comprehensive evaluation of the cable's durability and performance.
[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A testing device for cables used in DC charging piles, comprising: Support, torsion device, tension device, Both the tensioning device and the torsion device are mounted on the bracket. Its features are: The torsion device is located at the top of the support, and the tensioning device is bolted to the middle of the support. The position of the tensioning device on the support can be adjusted. The tensioning device includes a fixing block and a slide rail. The bottom of the slide rail is connected to the bracket, and the fixing block is provided on the top of the slide rail. The torsion device includes a torsion motor, a torsion rod, and a torsion disc. The top of the bracket is provided with a hole to accommodate the torsion rod. The torsion motor is provided at one end of the torsion rod, and the torsion disc is provided at the other end of the torsion rod. The center of the torsion disc and the center of the fixed block are on the same straight line; The fixing block can move along the slide rail, and a hole for fixing the cable to be tested is provided in the middle of the fixing block; The torsion motor can rotate the torsion rod, thereby driving the torsion disc to rotate.
2. The testing device for a DC charging pile cable according to claim 1, characterized in that: The torsion disk is internally provided with a torsion assembly, which includes a guide rail, a sliding block, a torsion block, a drive block, and a locking block. The guide rail is disposed at both ends of the sliding block, and the sliding block has a hole in the middle to accommodate the torsion block. The torsion block is fixed in the middle of the sliding block. The drive block is connected to the torsion block, and the drive block has a hole in the middle to accommodate the locking block. The torsion block is provided with the locking block. The sliding block can move along the guide rail, and the driving block can drive the torsion block to rotate. The torsion assembly can fix the cable to be tested and apply torque to the cable.
3. The testing device for a DC charging pile cable according to claim 2, characterized in that: The locking block is a semi-circular ring structure, and there are two locking blocks. One of the locking blocks has a fixing key in the middle of the outer side of the ring.
4. The testing device for a DC charging pile cable according to claim 3, characterized in that: A fixing pin is provided in the middle of the torsion block, and the torsion block and the locking block are connected by the fixing pin and the fixing key to prevent rotational misalignment.
5. The testing device for a DC charging pile cable according to claim 3, characterized in that: The inner side of the locking block ring has multiple teeth arranged, and the two locking blocks can be combined to fix the cable to be tested.
6. The testing device for a DC charging pile cable according to claim 5, characterized in that: The inner ring of the locking block comes in various sizes to secure cables of different diameters.
7. The testing device for a DC charging pile cable according to claim 5, characterized in that: One end of the drive block is connected to a motor, which provides power.
8. The testing device for a DC charging pile cable according to claim 2, characterized in that: The torsion assembly can reciprocate from the edge of the torsion disk to the center of the torsion disk via the guide rail.