Cable low temperature winding test device and winding assembly

Abstract

The present invention discloses a low-temperature cable winding test device and a winding assembly. The device comprises: a low-temperature box; at least one winding assembly, the winding assembly is located in the low-temperature box, the winding assembly comprises a guide rail frame, a rotating shaft and a pair of suspension frames, the guide rail frame is fixed on the side wall directly opposite to the low-temperature box, the suspension frame comprises a suspension part and a hanging part connected to the suspension part, the hanging part has a first through hole, the suspension part can be movably arranged on the guide rail frame and can be fixed on the guide rail frame, the pair of suspension frames are a main suspension frame and an auxiliary suspension frame, the first end of the rotating shaft is passed through the first through hole of the hanging part of the main suspension frame, the second end of the rotating shaft passes through the side wall of the low-temperature box, the first end of the rotating shaft and the first through hole of the hanging part of the auxiliary suspension frame are used to fix the test rod; a winding instrument, the winding instrument is located outside the low-temperature box and is connected to the second end of the rotating shaft, and is used to rotate the rotating shaft. The low-temperature winding test is carried out using the device to improve the accuracy of the results and the detection efficiency.

Description

Technical Field

[0001] The invention relates to the field of cable performance testing, and in particular to a cable low-temperature winding test device and a winding assembly. Background Art

[0002] The low-temperature winding test is a test method to verify that the cable can withstand low-temperature winding without cracking and still maintain insulation performance. It is used to evaluate the low-temperature resistance of the cable in a severe low-temperature environment. The current low-temperature winding test process is as follows: first, fix one end of the sample to the test rod with an iron clamp, and let the other end hang naturally and hang a weight. Then install the test rod on a fixed frame, place the fixed frame in a low-temperature box, and keep the temperature constant at a predetermined temperature for a certain period of time. After the constant temperature is over, open the low-temperature box, and the operator uses a stopwatch to time and quickly manually wind the test rod to make the cable wind the predetermined number of turns on the test rod. Observe whether there are cracks or cracks in the wound part of the sample. Finally, perform a withstand voltage test on the wound sample. Summary of the invention

[0003] The inventors have discovered that the current devices and processes for low-temperature cable winding have the following problems: First, during the low-temperature winding process, the low-temperature box door needs to be opened. After the low-temperature box door is opened, the outside air will exchange with the air in the low-temperature box, affecting the temperature inside the low-temperature box, making it difficult to ensure that the winding temperature remains at the predetermined temperature. Secondly, after the test rod and the sample are frozen by low temperature, the test rod may be frozen when touched by hand, making it difficult to wind it manually, resulting in the manual winding speed being difficult to accurately reach the predetermined speed. The winding temperature and winding speed are important parameters for the low-temperature winding test. If the above parameters cannot be guaranteed, it will seriously affect the final test results. Second, only one fixed frame can be placed in a low-temperature box, and each fixed frame can wind one or two samples, and manual winding is required, resulting in extremely low detection efficiency. Third, when conducting a low-temperature winding test, the fixing frame needs to be moved to a low-temperature box. After the low-temperature winding test is completed, the fixing frame needs to be moved out of the low-temperature box so that other low-temperature tests (such as low-temperature impact) can be performed using the low-temperature box. Therefore, it is necessary to move the fixing frame back and forth, and the fixing frame itself is relatively bulky, which will increase the difficulty of the operator's work.

[0004] In view of at least one of the above problems, the present invention proposes a cable low temperature winding test device. The specific technical solution of the present invention is as follows:

[0005] A cable low-temperature winding test device comprises: a low-temperature box; at least one winding assembly, the winding assembly is located in the low-temperature box, the winding assembly comprises a guide rail frame, a rotating shaft and a pair of suspension frames, the guide rail frame is fixed on the side wall directly opposite to the low-temperature box, the suspension frame comprises a hanging part and a hanging part connected to the hanging part, the hanging part has a first through hole, the hanging part can be movably arranged on the guide rail frame and can be fixed on the guide rail frame, the pair of suspension frames are a main suspension frame and an auxiliary suspension frame, the first end of the rotating shaft is penetrated in the first through hole of the hanging part of the main suspension frame, the second end of the rotating shaft passes through the side wall of the low-temperature box, the first end of the rotating shaft and the first through hole of the hanging part of the auxiliary suspension frame are used to fix a test rod; a winder, the winder is located on the outside of the low-temperature box and is connected to the second end of the rotating shaft, and is used to rotate the rotating shaft.

[0006] Furthermore, the guide rail frame includes a base, a top seat, and a raised portion between the base and the top seat, so that the guide rail frame has an "I"-shaped structure, and the hanging portion is clamped on the base.

[0007] Furthermore, the hanging part has bolts to fix the hanging part on the base.

[0008] Furthermore, the parts of the base located on both sides of the raised portion have notches, the two notches are arranged opposite to each other, and the length of the notches is greater than the length of the hanging portion.

[0009] Furthermore, a first bearing is provided in the first through hole of the hanging portion of the main suspension frame, and the first end of the rotating shaft is passed through the first bearing.

[0010] Furthermore, the guide rail frame is fixed on two opposite connecting plates, and the two connecting plates are respectively fixed on the side walls of the low temperature box. The connecting plate close to the main suspension frame has a second through hole, and a second bearing is arranged in the second through hole. The second end of the rotating shaft is passed through the second bearing.

[0011] Furthermore, the first end of the rotating shaft has a groove, the groove extends along the axial direction of the rotating shaft, a clamping portion is provided in the groove, and two ends of the clamping portion extend to the side walls of the groove respectively.

[0012] Furthermore, the test rod includes a first fixing portion, a second fixing portion, a winding portion, and a connecting portion connecting the fixing portion and the winding portion, each connecting portion is provided with a fixing plate and two screws, the screws pass through the fixing plate and are connected to the connecting portion, and are used to fix one end of the cable to be tested, the first fixing portion has a clamping groove extending axially along the winding portion, the first fixing portion is used to be arranged in the groove at the first end of the rotating shaft, and is clamped on the clamping portion at the first end of the rotating shaft through the clamping groove, and the second fixing portion is used to be arranged in the first through hole of the hanging portion of the auxiliary suspension frame.

[0013] Furthermore, a rubber hose is provided between the fixing plate and the connecting portion, and the rubber hose is used to be sleeved on one end of the cable to be tested, and the length of the rubber hose is greater than the width of the fixing plate.

[0014] In another aspect of the present invention, the present invention provides a winding assembly. The winding assembly is the winding assembly described above. Therefore, the winding assembly has all the features and advantages of the winding assembly described above, which will not be repeated here.

[0015] The cable low temperature winding test device of the present invention has the following advantages:

[0016] First, during low-temperature winding, the winding assembly inside the low-temperature box is controlled by the winding instrument outside the low-temperature box, so that the rotating shaft rotates, and then the test rod rotates to achieve cable winding. That is, the device can be used to achieve cable winding without opening the low-temperature box door, ensuring that the winding temperature is the predetermined temperature. In addition, the winding process is achieved by controlling the winding instrument, replacing the existing manual winding, ensuring the accuracy of the winding speed and improving the accuracy of the test results.

[0017] Second, the volume of the winding assembly is small, and multiple winding assemblies can be set up in the low-temperature box, that is, multiple cables can be wound in the same batch test, and the device does not require manual winding, which can significantly improve the detection efficiency.

[0018] Third, the winding assembly is fixed in the low temperature box, so there is no need to move the winding assembly back and forth during the test, which reduces the difficulty of the operator's work. In addition, there is a large space below the winding assembly in the low temperature box, so the winding assembly does not affect the low temperature winding test device to perform other low temperature tests (such as low temperature impact), so that the device can achieve multiple uses.

[0019] Fourth, by designing the structure of the first end of the rotating shaft and the structure of the test rod, the test rod can be firmly fixed on the winding assembly, and the sample can be firmly fixed on the test rod to prevent the test rod from rolling during low-temperature winding, and to prevent sliding and falling off between the sample and the test rod, and to reduce the risk of cracking at the fixed end of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic front view of a cable low temperature winding test device according to an embodiment of the present invention is shown;

[0021] Figure 2 It shows a schematic structural diagram of a guide rail frame according to an embodiment of the present invention;

[0022] Figure 3 A partial structural schematic diagram of a winding assembly according to an embodiment of the present invention is shown;

[0023] Figure 4 Shows along Figure 3 A schematic cross-sectional view of the A-A' section;

[0024] Figure 5 A partial structural schematic diagram of a cable low-temperature winding test device according to an embodiment of the present invention is shown;

[0025] Figure 6 The rotation axis is shown Figure 5 A side view schematic diagram in the direction indicated by the arrow;

[0026] Figure 7 A schematic diagram showing the structure of a test rod according to an embodiment of the present invention is shown;

[0027] Figure 8 A schematic side view of a test rod on one side of a first fixing portion according to an embodiment of the present invention is shown;

[0028] Fig. 9 A schematic side view of a test rod at one side of a second fixing portion according to an embodiment of the present invention is shown.

[0029] Description of reference numerals:

[0030] 10: guide rail frame; 11: base; 12: top seat; 13: raised portion; 14: notch; 20A: main suspension frame; 20B: auxiliary suspension frame; 21: suspension portion; 22: hanging portion; 23: first through hole; 24: bolt; 30: rotating shaft; 31: first end; 32: second end; 33: groove; 34: clamping portion; 40: first bearing; 50: second bearing; 60: connecting plate; 70: wall-mounted column; 100: low temperature box; 200: winding instrument; 300: test rod; 310: first fixing portion; 320: second fixing portion; 330: winding portion; 340: screw; 350: fixing plate; 360: connecting portion; 370: hose; 380: clamping groove. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] The present invention provides a cable low temperature winding test device. In some embodiments of the present invention, reference Figure 1 , Figure 2 , Figure 3 and Figure 5 The cable low temperature winding test device comprises: a low temperature box 100, a winding instrument 200 and at least one winding assembly. The winding assembly is located in the low temperature box 100, and the winding assembly comprises a guide rail frame 10 (such as Figure 1 and Figure 2 As shown), a rotating shaft 30 and a pair of suspension brackets (as Figure 1 The guide rail frame 10 is fixedly mounted on the side wall of the low temperature box 100, and the suspension frame (main suspension frame 20A and auxiliary suspension frame 20B) includes a suspension portion 21 and a hanging portion 22 connected to the suspension portion 21, and the hanging portion 22 has a first through hole 23 (such as Figure 3 The hanging part 21 is movably arranged on the guide rail frame 10 and can be fixed on the guide rail frame 10. The first end 31 of the rotating shaft 30 is inserted into the first through hole of the hanging part of the main hanging frame 20A. The second end 32 of the rotating shaft 30 passes through the side wall of the low temperature box 100 (as shown in FIG. Figure 1 As shown), the first end 31 of the rotating shaft 30 and the first through hole of the hanging portion of the auxiliary suspension frame 20B are used to fix the test rod, and the winder 200 is located outside the low temperature box 100 and is connected to the second end 32 of the rotating shaft 30 to rotate the rotating shaft 30.

[0033] The low temperature winding test device has the following advantages:

[0034] First, during low-temperature winding, the winding assembly inside the low-temperature box is controlled by the winding instrument outside the low-temperature box, so that the rotating shaft rotates, and then the test rod rotates to achieve the winding of the sample. That is, the device can be used to achieve cable winding without opening the low-temperature box door, ensuring that the winding temperature is the predetermined temperature. In addition, the winding process is achieved by controlling the winding instrument, replacing the existing manual winding, ensuring the accuracy of the winding speed and improving the accuracy of the test results.

[0035] Second, the volume of the winding assembly is small, and multiple winding assemblies can be set up in the low-temperature box, that is, multiple cables can be wound in the same batch test, and the device does not require manual winding, which can significantly improve the detection efficiency.

[0036] Third, the winding assembly is fixed in the low temperature box, so there is no need to move the winding assembly back and forth during the test, which reduces the difficulty of the operator's work. In addition, there is a large space below the winding assembly in the low temperature box, so the winding assembly does not affect the low temperature winding test device to perform other low temperature tests (such as low temperature impact), so that the device can achieve multiple uses.

[0037] The following describes in detail the various structures of the low temperature winding test device according to a specific embodiment of the present invention:

[0038] The cryogenic box 100 may be a cryogenic box commonly used in the art, and the low temperature treatment of the cable is achieved by adjusting the temperature of the cryogenic box 100 .

[0039] The specific structure of the winder 200 is not particularly limited, as long as the rotation speed and number of revolutions of the rotating shaft can be controlled, and those skilled in the art can make a selection according to actual conditions.

[0040] In some embodiments of the present invention, reference Figure 2 and Figure 3 The guide rail frame 10 in the winding assembly includes a base 11, a top seat 12, and a protrusion 13 between the base 11 and the top seat 12, so that the guide rail frame 10 has an "I"-shaped structure (that is, the shape of the longitudinal section of the guide rail frame 10 is an "I"-shaped (such as Figure 4 As shown)), to form a guide rail in the guide rail frame 10.

[0041] refer to Figure 3 and Figure 4 The suspension part 21 of the suspension frame (main suspension frame 20A and auxiliary suspension frame 20B) is clamped on the base 11, and the guide rail provides a clamping space for the suspension part 21. The shape of the opening in the suspension part 21 is an inverted "T" shape (such as Figure 4 As shown in FIG. 1 , the hanging portion 21 is movably disposed on the guide rail frame 10, that is, the hanging portion 21 can move in the guide rail. Specifically, the size of the portion of the opening of the hanging portion 21 corresponding to the base 11 can be slightly larger than the size of the base 11, and the size of the portion of the opening of the hanging portion 21 corresponding to the protrusion 13 can be slightly larger than the size of the protrusion 13 (as shown in FIG. 1 ). Figure 4 As shown), the test rod can be installed by adjusting the positions of the two hangers, which is simple and easy to operate.

[0042] refer to Figure 1 and Figure 3 The suspension part 21 of the suspension bracket has a bolt 24. After the two suspension brackets are moved to a predetermined position to install the test rod, the suspension part 21 is fixed to the base 11 by adjusting the bolt, thereby fixing the test rod.

[0043] In some embodiments of the present invention, reference Figure 2 and Figure 3In the guide rail frame 10, the base 11 on both sides of the raised portion 13 may also have notches 14, and the two notches 14 are arranged opposite to each other ( Figure 2 and Figure 3 Only the notch on one side of the base is shown in the figure), and the length of the notch 14 is greater than the length of the hanging portion 21. Therefore, when assembling the winding assembly, the hanging portion of the hanging frame can be clamped on the base from the notch 14, which is convenient for the installation of the hanging frame.

[0044] In some embodiments of the present invention, reference Figure 1 The first end 31 of the rotating shaft 30 is inserted into the first through hole of the hanging portion of the main suspension frame 20A. Figure 5 A first bearing 40 is disposed in the first through hole of the hanging portion 22 of the main suspension frame 20A, and the first end 31 of the rotating shaft 30 is passed through the first bearing 40. Thus, the rotation of the rotating shaft is facilitated.

[0045] The specific manner in which the guide rail frame is fixed to the side wall of the low temperature box is not particularly limited. For example, in some embodiments of the present invention, reference Figure 1 and Figure 5 The guide rail frame 10 can be fixed on two connecting plates 60 facing each other, and the two connecting plates 60 are respectively fixed on the side walls of the low temperature box 100. The guide rail frame 10 can be fixed on the connecting plates 60 by welding, and the side wall of the low temperature box 100 for setting the winding assembly has two spaced wall hanging columns 70 (such as Figure 1 As shown, Figure 1 Only one wall-mounted column on each side wall is shown), and each connecting plate 60 can be fixed to the two wall-mounted columns 70 on the corresponding side wall by welding to fix the guide rail frame to the side wall of the low temperature box. The wall-mounted columns 70 are arranged on the side wall of the low temperature box 100 to increase the stability of the winding assembly connected to the side wall of the low temperature box. The guide rail frame 10 can be arranged at a position close to the top of the low temperature box 100 (refer to Figure 1 ) to reserve more space.

[0046] refer to Figure 1 and Figure 5 The connecting plate 60 near the main suspension frame 20A has a second through hole, in which a second bearing 50 is disposed, and the second end 32 of the rotating shaft 30 is disposed in the second bearing 50 and passes through the side wall of the low temperature box 100. The second bearing can further facilitate the rotation of the rotating shaft and improve the stability of the rotation of the rotating shaft.

[0047] In some specific examples of the present invention, the cable low-temperature winding test device may have two winding assemblies, and the guide rail frames in the two winding assemblies are arranged side by side. Specifically, one end of the two guide rail frames is fixed on a connecting plate, and the other end is fixed on another connecting plate. The winders are respectively connected to the rotating shafts in the two winding assemblies. By setting the program of the winder, the winder can independently control the rotation of the two rotating shafts. For example, when only the first rotating shaft needs to rotate, the program for controlling the first rotating shaft is started; when only the second rotating shaft needs to rotate, the program for controlling the second rotating shaft is started; when both rotating shafts need to rotate at the same time, the program for controlling the first rotating shaft and the program for controlling the second rotating shaft are started at the same time.

[0048] In addition, the inventors found that since a weight is hung on the drooping end of the sample, and the weight is heavy, it is easy to cause the test rod to roll in the traditional fixing frame and the sample and the test rod to slide or even fall off. Secondly, the end of the sample fixed with an iron clamp is easily damaged and cracked due to scratches by the iron clamp, affecting the test results. In some embodiments of the present invention, by designing the structure of the first end of the rotating shaft and the structure of the test rod, the test rod can be firmly fixed on the winding assembly, and the sample can be firmly fixed on the test rod, so as to prevent the test rod from rolling during the low-temperature winding process, and to prevent the sample and the test rod from sliding and falling off, and the risk of cracking at the fixed end of the sample can be reduced.

[0049] Specifically, refer to Figure 5 and Figure 6 The first end 31 of the rotating shaft 30 has a groove 33, which extends along the axial direction of the rotating shaft 30. A clamping portion 34 is provided in the groove 33, and both ends of the clamping portion 34 extend to the side walls of the groove 33. The groove and the clamping portion are used to fix one end of the test rod.

[0050] refer to Figure 7-Figure 9 The test rod 300 includes a first fixing portion 310, a second fixing portion 320, a winding portion 330, and a connecting portion 360 connecting the winding portion 330 and the fixing portion (the first fixing portion 310, the second fixing portion 320). Each connecting portion 360 is provided with a fixing plate 350 and two screws 340, and the screws 340 pass through the fixing plate 350 and are connected to the connecting portion 360 (such as Figure 8 and Fig. 9 ), used to fix one end of the cable to be tested, the first fixing portion 310 has a clamping groove 380 (as shown) extending axially along the winding portion 330 Figure 8As shown in the figure, when the test bar 300 is installed on the winding assembly, the first fixing portion 310 is set in the groove 33 of the first end of the rotating shaft, and is clamped on the clamping portion 34 of the first end of the rotating shaft through the clamping groove 380, and the second fixing portion 320 is set in the first through hole of the hanging portion of the auxiliary suspension frame. In this way, the test bar can be firmly fixed on the winding assembly, and the sample can be firmly fixed on the test bar to prevent the test bar from rolling during the low-temperature winding process, and to prevent the sample from sliding and falling off from the test bar.

[0051] refer to Figure 8 and Fig. 9 There is a rubber hose 370 between the fixing plate 350 and the connecting part 360. The rubber hose 370 is used to be sleeved on one end of the cable to be tested (i.e., the fixed end of the cable to be tested), and the length of the rubber hose 370 is greater than the width of the fixing plate 350. During the test, one end of the sample is passed through the rubber hose, and the screw 340 is tightened toward the side close to the connecting part 360 to adjust the distance between the fixing plate 350 and the connecting part 360 to fix the sample. Since the rubber hose is sleeved on the fixed end of the sample, and the length of the rubber hose is greater than the width of the fixing plate, that is, the part of the sample between the connecting part and the fixing plate is sleeved with the rubber hose, the risk of scratching or cracking the fixed end of the sample can be significantly reduced, thereby improving the accuracy of the test results.

[0052] The screw 340 and the fixing plate 350 on one side of the first fixing part 310 can fix one sample, and the screw 340 and the fixing plate 350 on one side of the second fixing part 320 can also fix one sample, that is, one test rod can realize the winding of two samples at the same time.

[0053] During the test, one end of the sample can be first fixed on the test rod, and then the test rod can be fixed on the winding assembly. Then, a weight of a predetermined weight can be hung on the drooping end of the sample to keep the sample at a predetermined temperature for a certain period of time. After the constant temperature is reached, the winding machine is turned on to rotate the rotating shaft, thereby driving the test rod to rotate and causing the sample to wind.

[0054] Materials used to form the guide rail frame, rotating shaft and suspension frame include stainless steel.

[0055] Materials used to form the test bars include stainless steel.

[0056] In another aspect of the present invention, the present invention provides a winding assembly. The winding assembly is the winding assembly used in the cable low temperature winding test device described above. Therefore, the winding assembly has all the features and advantages of the winding assembly described above, which will not be repeated here.

[0057] In the description of the present invention, the orientation or position relationship indicated by the terms "upper" and "lower" etc. is based on the orientation or position relationship shown in the drawings and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "another embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory. In addition, it should be noted that in this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cable low temperature winding test device, characterized in that: include: cryogenic chamber; At least one winding assembly, the winding assembly is located in the low temperature box, the winding assembly includes a guide rail frame, a rotating shaft and a pair of hanging frames, the guide rail frame is fixed on the side wall directly opposite to the low temperature box, the hanging frame includes a hanging part and a hanging part connected to the hanging part, the hanging part has a first through hole, the hanging part can be movably arranged on the guide rail frame and can be fixed on the guide rail frame, the pair of hanging frames are a main hanging frame and an auxiliary hanging frame, the first end of the rotating shaft is penetrated in the first through hole of the hanging part of the main hanging frame, the second end of the rotating shaft passes through the side wall of the low temperature box, the first end of the rotating shaft and the first through hole of the hanging part of the auxiliary hanging frame are used to fix the test rod; A winder, the winder is located outside the low temperature box and connected to the second end of the rotating shaft, and is used to rotate the rotating shaft. Wherein, the material used to form the guide rail frame, the rotating shaft and the suspension frame includes stainless steel.

2. The cable low temperature winding test device according to claim 1, characterized in that: The guide rail frame includes a base, a top seat and a protruding portion between the base and the top seat, so that the guide rail frame has an "I"-shaped structure, and the hanging portion is clamped on the base.

3. The cable low temperature winding test device according to claim 2, characterized in that: The hanging part has bolts to fix the hanging part on the base.

4. The cable low temperature winding test device according to claim 2, characterized in that: Portions of the base located on both sides of the raised portion have notches, the two notches are arranged opposite to each other, and the length of the notches is greater than the length of the hanging portion.

5. The cable low temperature winding test device according to claim 1, characterized in that: A first bearing is arranged in the first through hole of the hanging portion of the main suspension frame, and the first end of the rotating shaft passes through the first bearing.

6. The cable low temperature winding test device according to claim 1, characterized in that: The guide rail frame is fixed on two opposite connecting plates, and the two connecting plates are respectively fixed on the side walls of the low temperature box. The connecting plate close to the main suspension frame has a second through hole, and a second bearing is arranged in the second through hole. The second end of the rotating shaft is passed through the second bearing.

7. The cable low temperature winding test device according to claim 1, characterized in that: The first end of the rotating shaft has a groove, and the groove extends along the axial direction of the rotating shaft. A clamping portion is arranged in the groove, and two ends of the clamping portion extend to the side walls of the groove respectively.

8. The cable low temperature winding test device according to claim 7, characterized in that: The test rod comprises a first fixing portion, a second fixing portion, a winding portion, and a connecting portion connecting the fixing portion and the winding portion. A fixing plate and two screws are provided at each connecting portion. The screws pass through the fixing plate and are connected to the connecting portion, and are used to fix one end of the cable to be tested. The first fixing portion has a clamping groove extending axially along the winding portion. The first fixing portion is used to be arranged in the groove of the first end of the rotating shaft and is clamped on the clamping portion of the first end of the rotating shaft through the clamping groove. The second fixing portion is used to be arranged in the first through hole of the hanging portion of the auxiliary suspension frame.

9. The cable low temperature winding test device according to claim 8, characterized in that: A rubber hose is provided between the fixing plate and the connecting portion. The rubber hose is used for being sleeved on one end of the cable to be tested, and the length of the rubber hose is greater than the width of the fixing plate.

10. A winding assembly, characterized in that: The winding assembly is the winding assembly according to any one of claims 1 to 8.

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