Torsion angle testing device for cable

Abstract

The utility model discloses a torsion angle testing device for a cable, which is matched with testing equipment for use and comprises a base, a worm, a worm gear, a fixed bearing and a cable fixing piece, two ends of the worm are rotationally erected on the base; the worm gear is arranged above the base and is meshed with the worm; the fixed bearing is fixed to the base through an external fixing support and is coaxial with the worm wheel, and the movable inner ring face of the fixed bearing is connected with the worm wheel through a connecting assembly so that the movable inner ring face of the fixed bearing and the worm wheel can rotate synchronously. The cable fixing piece is arranged on the inner wall of the movable inner ring of the fixed bearing, one end of the radio frequency cable is connected to the test equipment through the adapter, and the other end of the radio frequency cable penetrates through the movable inner ring of the fixed bearing and is fixed in the movable inner ring face of the fixed bearing through the cable fixing piece. Therefore, the radio frequency cable located on the movable inner ring of the fixed bearing and the movable inner ring of the fixed bearing rotate synchronously, twisting of the radio frequency cable is achieved, and adjustment of the twisting angle of the cable is easier to control.

Description

Technical Field

[0001] The utility model relates to the technical field of cable testing devices, in particular to a torsion angle testing device for a cable. Background Art

[0002] At present, as the cable application environment becomes more and more harsh, the requirements for cable performance indicators are more stringent. In order to ensure the reliability of cable performance indicators, test equipment is designed to imitate its application environment, simulate the cable application environment, and ensure the reliability of cable information transmission.

[0003] The cable torsion test is a test method used to evaluate the performance and durability of cables under torsional forces. During the cable torsion test, the angle of cable torsion is usually recorded. This angle can reflect the elasticity and plasticity of the cable material and whether there are any internal defects.

[0004] However, in the current cable torsion angle test, it is difficult to achieve precise control of the cable torsion angle, making it difficult to accurately determine the impact on the performance of the cable at different torsion angles. Utility Model Content

[0005] The purpose of the utility model is to provide a torsion angle test device for cables, which can improve the control accuracy of the torsion angle of cables in cable torsion angle tests, thereby more accurately judging the effects of different torsion angles on cables.

[0006] The technical solution of the utility model is:

[0007] A torsion angle test device for a cable, used in conjunction with a test device, comprises: a base; a worm, with both ends rotatably mounted on the base, one end of the worm connected to the output shaft of a servo motor, and the servo motor is arranged on the base through a motor seat; a worm wheel, arranged above the base and meshing with the worm; a fixed bearing, fixed to the base through an external fixed bracket and coaxially arranged with the worm wheel, the movable inner ring surface of the fixed bearing being connected to the turbine through a connecting assembly so that the movable inner ring surface of the fixed bearing and the turbine rotate synchronously; a cable fixing part, arranged on the inner wall of the movable inner ring of the fixed bearing, one end of the cable being fixed to the test device through an adapter, and the other end being connected to the movable inner ring surface of the fixed bearing through the cable fixing part.

[0008] Furthermore, the cable fixing part includes: an elastic part, which is a tubular sponge and adhered to the inner wall of the movable inner ring of the fixed bearing, the outer ring of the elastic part is circular, and the inner hole is hexagonal; an auxiliary fixing tool, which is an annular sponge. The auxiliary tool is sleeved on the cable and engaged with the inner ring surface of the elastic part. According to the degree of compression, relative rotation will not occur within a certain range, and the certain range is 0-30N. The elastic part and the auxiliary fixing tool are engaged with each other, and the cable is driven to rotate when the movable inner ring rotates, thereby realizing the twisting of the cable, avoiding the appearance damage of the cable during the twisting process and affecting the cable performance. Moreover, by engaging elastic parts and auxiliary fixing tooling designed in different sizes, the torsion angle test of cables with different wire diameters can be realized.

[0009] Furthermore, the size of the annular inner ring of the auxiliary fixing tool is 0.9 times the outer diameter of the cable, and the radius of the outer ring of the auxiliary fixing tool is 0.95 times the length of the inner hexagon of the elastic part, thereby making the fit between the elastic part and the auxiliary fixing tool more stable, and making the fit between the auxiliary fixing tool and the cable more stable.

[0010] Furthermore, a plurality of slits are provided on the outer ring surface of the auxiliary fixing tool.

[0011] Furthermore, a hole is opened at the center of the disk of the worm wheel.

[0012] Furthermore, the connecting assembly includes: a fixed through hole, which is provided at a position of the worm wheel disc that deviates from the center of the circle; a fixed welding point, which is located on the annular end surface of the movable inner ring of the fixed bearing;

[0013] A connecting rod has one end connected to the fixed through hole and the other end connected to the fixed welding point by welding, so that the fixed bearing and the worm gear rotate synchronously.

[0014] Furthermore, one end of the connecting rod is detachably connected to the fixing through hole via bolts and nuts, and the fixed bearing is detachably connected to the fixing bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model fixes one end of the RF cable on the test equipment through an adapter, and the other end passes through the movable inner ring of the fixed bearing and is fixed in the movable inner ring surface of the fixed bearing through a cable fixing part, so that the RF cable fixed to the movable inner ring of the fixed bearing and the movable inner ring of the fixed bearing rotate synchronously, thereby realizing torsion of the RF cable. The movable inner ring surface of the fixed bearing of the utility model is connected to the worm gear through a connecting rod and rotates synchronously. The worm gear is driven by a servo motor to drive the worm, thereby driving the movable inner ring surface of the fixed bearing to realize 3° to 360° torsion and reverse torsion. Moreover, the utility model makes full use of the characteristic of the servo motor that can accurately control the speed and rotation angle, and then accurately transmits the rotation angle of the servo motor to the worm gear, so that the worm gear drives the movable inner ring surface of the fixed bearing to rotate the corresponding angle, thereby realizing more precise adjustment and control of the torsion angle of the RF cable.

[0017] 2. One end of the connecting rod of the utility model is detachably connected to the fixed through hole by bolts and nuts, and the fixed bearing is detachably connected to the fixed bracket. By replacing the fixed bearing parts with movable inner rings of different apertures, cable torsion tests of different wire diameters can be achieved.

[0018] 3. The utility model realizes twisting by interlocking the elastic member and the auxiliary fixing tool, and both the elastic member and the auxiliary fixing tool are made of sponge material, which avoids the appearance damage of the cable during the twisting process and affects the cable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the main view of the structural schematic diagram of the utility model.

[0020] Figure 2 It is a side view of the structural schematic diagram of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the utility model after the cable is installed.

[0022] Among them, 1. base, 2. worm, 3. fixed bearing, 4. elastic part, 5. worm gear, 6. connecting rod, 7. fixed through hole, 8. fixed solder point, 9. fixed bracket, 10. RF cable. DETAILED DESCRIPTION

[0023] The following combination Figures 1 to 3, a detailed description of the specific embodiments of the present invention is provided. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0025] The control system and testing equipment of the servo motor are all existing technology equipment and do not involve any innovation.

[0026] Example

[0027] as follows Figure 1 、 Figure 2 and Figure 3 As shown, a torsion angle test device for cables is used in conjunction with a test device, comprising: a base 1, a worm 2, a worm wheel 5, a fixed bearing 3 and a cable fixing; both ends of the worm 2 are rotatably mounted on the base 1, one end of the worm 2 is connected to the output shaft of the servo motor, and the servo motor is set on the base 1 through a motor seat; the worm wheel 5 is set above the base 1 and meshes with the worm 2. When the servo motor rotates the worm 2, the worm wheel 5 rolls and rotates along the spiral surface of the worm 2, and a channel is opened at the center of the disk of the worm wheel 5; the fixed bearing 3 is fixed to the base 1 through an external fixing bracket 9 and is coaxially arranged with the worm wheel 5. The movable inner ring surface of 3 is connected to the turbine 5 through a connecting component, so that the movable inner ring surface of the fixed bearing 3 and the turbine 5 rotate synchronously; the cable fixing part is arranged on the inner wall of the movable inner ring of the fixed bearing 3, one end of the RF cable 10 is fixed to the test equipment through an adapter, and the other end passes through the movable inner ring of the fixed bearing 3 and is fixed in the movable inner ring surface of the fixed bearing 3 through the cable fixing part, so that the RF cable 10 located on the movable inner ring of the fixed bearing 3 and the movable inner ring of the fixed bearing 3 rotate synchronously, realizing the torsion of the RF cable 10, and the torsion of 3° to 360° and the reverse torsion thereof can be realized through the worm gear 5 and the worm 2.

[0028] In some embodiments, the cable fixing member includes: an elastic member 4 and an auxiliary fixing tool, such as Figure 1As shown, the elastic member 4 is a tubular sponge adhered to the inner wall of the movable inner ring of the fixed bearing 3. The outer ring of the elastic member 4 is circular and the inner hole is hexagonal. The auxiliary fixing fixture is an annular sponge. The auxiliary fixture is mounted on the RF cable 10, and the outer ring surface of the auxiliary fixing fixture engages with the inner ring surface of the elastic member 4. By interlocking the elastic member and the auxiliary fixing fixture, the RF cable 10 is rotated when the movable inner ring rotates, thereby achieving torsion of the RF cable 10. This avoids damage to the appearance of the RF cable 10 during the torsion process, which may affect the performance of the RF cable 10. Moreover, by interlocking elastic members and auxiliary fixing fixtures of different sizes, torsion angle testing of RF cables 10 with different wire diameters can be achieved.

[0029] In some embodiments, in order to make the fit between the elastic member and the auxiliary fixing fixture more stable, and to make the fit between the auxiliary fixing fixture and the RF cable 10 more stable, the inner ring size of the auxiliary fixing fixture is 0.9 times the outer diameter of the RF cable 10, and the radius of the outer ring of the auxiliary fixing fixture is 0.95 times the length of the inner hexagon of the elastic member 4.

[0030] In some embodiments, in order to increase the friction between the outer ring surface of the auxiliary fixing tool and the inner ring surface of the elastic member 4 , a plurality of slits are provided on the outer ring surface of the auxiliary fixing tool, and the width of the slits is 0.1 mm.

[0031] like Figure 1 and Figure 2 As shown, the connecting assembly includes: a fixed through hole 7, a fixed welding point 8 and a connecting rod 6. The fixed through hole 7 is opened at a position where the disk of the worm gear 5 deviates from the center of the circle; the fixed welding point 8 is set on the annular end face of the movable inner ring of the fixed bearing 3; one end of the connecting rod 6 is connected to the fixed through hole 7, and the other end is connected to the fixed welding point 8 on the annular end face of the movable inner ring of the bearing 3 by welding, so that the fixed bearing 3 and the worm gear 5 rotate synchronously.

[0032] In order to facilitate the disassembly of the fixed bearing 3 and realize the torsion test of cables with different wire diameters by replacing the fixed bearing 3 with a movable inner ring of different apertures, one end of the connecting rod 6 is detachably connected to the fixed through hole 7 by a bolt and nut, and the fixed bearing 3 is detachably connected to the fixed bracket 9.

[0033] like Figure 3As shown, one end of the RF cable 10 first passes through the hole of the worm gear 5 from the right side, then passes through the fixed bearing 3, and is finally connected to the test equipment. The other end of the RF cable 10 leaves a certain distance and passes through the entire device to facilitate the test of the electrical performance of the RF cable 10. The auxiliary fixing tool on the RF cable 10 is engaged with the elastic part 4 in the fixed bearing 3, so that after the servo motor drives the worm gear 5 to rotate, the connecting rod 6 synchronously drives the sliding inner ring of the fixed bearing 3 to rotate, thereby realizing the torsion of the cable. After the RF cable 10 is twisted, the test equipment uses a vector network analyzer to test and record the circuit parameters of the RF cable 10.

[0034] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A cable torsion angle test device, used in conjunction with a test device, characterized in that: include: Base (1); A worm (2) is rotatably mounted on the base (1) at both ends, one end of the worm (2) is connected to the output shaft of a servo motor, and the servo motor is mounted on the base (1) via a motor seat; a worm wheel (5), arranged above the base (1) and meshing with the worm (2); A fixed bearing (3) is fixed to the base (1) via an external fixed bracket (9) and is coaxially arranged with the worm gear (5). The movable inner ring surface of the fixed bearing (3) is connected to the turbine (5) via a connecting assembly so that the movable inner ring surface of the fixed bearing (3) and the turbine (5) rotate synchronously. The cable fixing part is arranged on the inner wall of the movable inner ring of the fixed bearing (3); one end of the cable is fixed to the test equipment through an adapter, and the other end is connected to the movable inner ring surface of the fixed bearing (3) through the cable fixing part.

2. A cable torsion angle test device according to claim 1, characterized in that: The cable fixing member comprises: An elastic member (4), the elastic member (4) is a tubular sponge, adhered to the inner wall of the movable inner ring of the fixed bearing (3), the outer ring of the elastic member (4) is circular, and the inner hole is hexagonal; The auxiliary fixing tool is an annular sponge body, the auxiliary tool is sleeved on the cable and is engaged with the inner annular surface of the elastic member (4).

3. A cable torsion angle test device according to claim 2, characterized in that: The size of the annular inner ring of the auxiliary fixing tool is 0.9 times the outer diameter of the cable, and the radius of the outer ring of the auxiliary fixing tool is 0.95 times the side length of the inner hexagon of the elastic member (4).

4. A cable torsion angle test device according to claim 2, characterized in that: A plurality of slits are arranged on the outer ring surface of the auxiliary fixing tool.

5. A cable torsion angle test device according to claim 1, characterized in that: A hole is provided at the center of the disk surface of the worm wheel (5).

6. A cable torsion angle test device according to claim 1, characterized in that: The connection component includes: A fixed through hole (7) is provided at a position of the disk surface of the worm wheel (5) that deviates from the center of the circle; A fixed welding point (8) is located on the annular end surface of the movable inner ring of the fixed bearing (3); A connecting rod (6) has one end connected to the fixed through hole (7) and the other end connected to the fixed welding point (8) by welding, so that the fixed bearing (3) and the worm gear (5) rotate synchronously.

7. A cable torsion angle test device according to claim 6, characterized in that: One end of the connecting rod (6) is detachably connected to the fixed through hole (7) via bolts and nuts, and the fixed bearing (3) is detachably connected to the fixed bracket (9).

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