Conductive rolling ring contact fatigue testing device

Abstract

The invention discloses a conductive rolling ring contact fatigue testing device, which comprises a base, a bearing table, a contact fatigue testing device and a contact fatigue testing device, and is characterized in that a bearing table is fixed on the table surface; the back frame is fixed to the base, two symmetrical fixing blocks are fixed to the front face of the back frame, a screw rod is rotatably connected between the two fixing blocks, and the screw rod is driven by a first motor fixed to the back frame; the nut block is in threaded connection with the threaded section of the screw rod; a nut block is fixedly connected to the back face of the movable seat, a carrying plate is fixed to the front face of the movable seat, two sliding barrels are fixed to the carrying plate, and the sliding barrels are in sliding connection with sliding columns fixed to the base in a matched mode. The device can simulate a real rolling contact working condition, multi-point synchronous, stable and reliable long-time fatigue test is carried out on the rolling ring under controllable constant voltage, key data is collected in real time, and a powerful experimental tool is provided for evaluating and improving the contact fatigue life and reliability of the conductive rolling ring.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of conductive rolling ring production, and more specifically, to a contact fatigue testing device for conductive rolling rings. Background Art

[0002] As a key electrical transmission component, conductive rolling rings are widely used in devices that require infinite rotation while transmitting power or signals. During the production process, it is necessary to conduct contact fatigue life tests on rolling rings under long-term rolling friction. However, the existing testing equipment has the following drawbacks: It is difficult to accurately apply and maintain a constant and evenly distributed contact pressure on the entire circumferential surface of the rolling ring and during long-term testing using a point-contact probe. Pressure fluctuations or unevenness will cause test results to be distorted and unable to truly reflect the fatigue performance of the rolling ring under actual continuous rolling contact conditions.

[0003] Moreover, during the manufacturing or installation process of conductive rolling rings, there are inevitably small cylindricity errors or installation eccentricities. Rigid test probes or structures are difficult to adaptively fit these subtle irregular surfaces, resulting in poor contact, pressure concentration, or local disengagement, seriously affecting the accuracy and repeatability of the test. Summary of the Invention

[0004] Therefore, the present invention proposes a contact fatigue testing device for conductive rolling rings to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A contact fatigue testing device for conductive rolling rings, which includes:

[0006] A base, on the tabletop of which a placement table is fixed;

[0007] A back frame, which is fixed on the base. Two symmetrically arranged fixing blocks are fixed on the front surface of the back frame, and a screw rod is rotatably connected between the two fixing blocks. The screw rod is driven by a first motor fixed on the back frame;

[0008] A nut block, which is threadedly connected to the threaded section of the screw rod;

[0009] A moving seat, which is fixedly connected to the nut block on the back surface. A carrier plate is fixed on the front surface of the moving seat. Two sliding cylinders are fixed on the carrier plate, and the sliding cylinders are slidably matched with sliding columns fixed on the base;

[0010] And a fatigue testing mechanism, which is provided with a plurality of them and is equidistantly installed on the carrier plate. Each fatigue testing mechanism can perform smoothness detection on the outer ring surface of the conductive rolling ring loaded on the placement table.

[0011] Further, preferably, the fatigue testing mechanism is composed of a second motor, a bearing seat, a rotating shaft, and a detection component. Among them, the second motor is fixed on the carrier plate, the driving end of the second motor is drivingly connected to one end of the rotating shaft, and the other end of the rotating shaft passes through the bearing seat fixed on the moving seat and is fixedly connected to the detection component.

[0012] Further, preferably, the detection component includes:

[0013] A cap seat, inside which a cap rod is fixed;

[0014] An upper sliding seat, which is fixedly connected to the bottom end of the cap rod;

[0015] A support ring, which is fixedly sleeved on the bottom of the upper sliding seat, and a plurality of convex seats are fixed on the side wall of the support ring;

[0016] And a smoothness detector, there are a plurality of them, and they are arranged in an array along the circumferential direction of the upper sliding seat. Each smoothness detector is rotatably connected between two corresponding convex seats.

[0017] Further, preferably, the smoothness detector includes:

[0018] A rotating arm, which is rotatably installed between two convex seats by a rotating pin;

[0019] A roller detector, which is rotatably installed at the bottom end of the rotating arm;

[0020] Two column bolts, which are respectively installed on the top of the rotating arm and the cap rod;

[0021] And a spring, which is connected between the two column bolts.

[0022] Further, preferably, the inner wall of the cap seat is set as a conical surface and abuts against the retaining wheel, and the retaining wheel is rotatably installed on the top of the rotating arm.

[0023] Further, preferably, under the elastic force drive of each spring, the radial length of the detection area formed by each rotating arm fence is slightly smaller than the outer diameter of the conductive rolling ring.

[0024] Further, preferably, a data collector is installed on the front surface of the moving seat, and the data collector can receive the data collected by the roller detector in real time.

[0025] Further, preferably, a lower sliding seat is slidably matched inside the upper sliding seat, and a compression spring is connected between the upper sliding seat and the lower sliding seat.

[0026] The present invention adopts the above technologies and has the following beneficial effects compared with the existing technologies: In the device of the present invention, the roller-type detector directly contacts the outer ring surface of the rolling ring, simulating the rolling contact state between the rolling ring and the corresponding brush or slip ring in actual work. The spring-driven swing arm structure ensures that each roller-type detector applies a constant and controllable contact pressure to the surface of the rolling ring during testing;

[0027] And each smoothness detection member (roller and swing arm) is independently hinged between the convex seats through a pivot pin, and the spring provides a pulling force through a stud. This design enables multiple roller-type detectors to adaptively fit the cylindrical outer surface of the conductive rolling ring. In this way, even if there are slight cylindricity errors or installation eccentricities in the rolling ring, each detector can maintain good contact with the surface, ensuring uniform distribution of the contact pressure in the circumferential direction of the ring surface and improving the representativeness and accuracy of the test data. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of a conductive rolling ring contact fatigue test device;

[0029] Figure 2 It is a schematic structural diagram of a fatigue test mechanism in a conductive rolling ring contact fatigue test device;

[0030] Figure 3 It is a schematic structural diagram of a detection component in a conductive rolling ring contact fatigue test device;

[0031] Figure 4 It is a schematic cross-sectional structural diagram of a detection component in a conductive rolling ring contact fatigue test device.

[0032] In the figure: 1. Back frame; 2. Moving seat; 3. Slide column; 4. Motor 1; 5. Slide cylinder; 6. Placing table; 7. Base; 8. Carrier plate; 9. Motor 2; 10. Data collector; 11. Detection component; 12. Bearing seat; 1101. Cap seat; 1102. Convex seat; 1103. Roller-type detector; 1104. Pivot pin; 1105. Swing arm; 1106. Retaining wheel; 1107. Stud; 1108. Spring; 1109. Lower slide seat; 1110. Compression spring; 1111. Upper slide seat. Detailed Embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment: Please refer to the attached Figures 1-4, the present invention provides a technical solution: a conductive rolling ring contact fatigue test device, which includes:

[0035] A base 7, on the tabletop of which a placement table 6 is fixed;

[0036] A back frame 1, which is fixed on the base 7. On the front surface of the back frame 1, two symmetrically fixed blocks are fixed, and a screw rod is rotatably connected between the two fixed blocks. The screw rod is driven by a first motor 4 fixed on the back frame 1;

[0037] A nut block, which is threadedly connected to the threaded section of the screw rod;

[0038] A moving seat 2, on the back surface of which the nut block is fixedly connected. On the front surface of the moving seat 2, a carrier plate 8 is fixed. On the carrier plate 8, two sliding cylinders 5 are fixed, and the sliding cylinders 5 are slidably matched with sliding columns 3 fixed on the base 7;

[0039] And a fatigue test mechanism, which is provided with a plurality of them and is equidistantly installed on the carrier plate 8. Each fatigue test mechanism can detect the smoothness of the outer ring surface of the conductive rolling ring loaded on the placement table 6;

[0040] Specifically, by driving the screw rod and nut block mechanism by the first motor, and cooperating with the precise sliding guidance of the sliding cylinder and the sliding column, the moving seat (and the carrier plate and the fatigue test mechanism) is stably and accurately linearly moved along the axis direction of the sliding column, ensuring the position accuracy and the movement trajectory stability of the roller-type detector relative to the outer ring surface of the conductive rolling ring during the test, and reducing the test error introduced by mechanical vibration or inaccurate positioning.

[0041] In this embodiment, the fatigue test mechanism is composed of a second motor 9, a bearing seat 12, a rotating shaft and a detection component 11. Among them, the second motor 9 is fixed on the carrier plate 8, the driving end of the second motor 9 is drivingly connected to one end of the rotating shaft, and the other end of the rotating shaft passes through the bearing seat 12 fixed on the moving seat 2 and is fixedly connected to the detection component 11.

[0042] In this embodiment, the detection component 11 includes:

[0043] A cap seat 1101, inside which a cap rod is fixed;

[0044] An upper sliding seat 1111, which is fixedly connected to the bottom end of the cap rod;

[0045] A support ring, which is fixedly sleeved on the bottom of the upper sliding seat 1111. On the side wall of the support ring, a plurality of convex seats 1102 are fixed;

[0046] And a smoothness detection piece, which is provided with a plurality of them and is arranged in an array along the circumferential direction of the upper sliding seat 1111. Each smoothness detection piece is rotatably connected between two corresponding convex seats 1102.

[0047] In this embodiment, the smoothness detection component includes:

[0048] A rotating arm 1105 is rotatably mounted between the two bosses 1102 using a rotating pin 1104;

[0049] A roller detector 1103 is rotatably mounted on the bottom end of the rotating arm 1105;

[0050] Two studs 1107 are provided and are respectively mounted on the top of the rotating arm 1105 and the cap rod;

[0051] and a spring 1108 connected between the two studs 1107;

[0052] Specifically, the roller probe directly contacts the outer ring surface of the roller ring, simulating the rolling contact state between the roller ring and the corresponding brush or slip ring in actual operation. The spring-driven arm structure ensures that each roller probe applies a constant and controllable contact pressure on the roller ring surface during testing;

[0053] Each smoothness detection component (roller and rotating arm) is independently hinged between the bosses through a rotating pin, and a spring provides tension through a stud. This design enables multiple roller detectors to adaptively fit the cylindrical outer surface of the conductive roller ring. In this way, even if the roller ring has a slight cylindricity error or installation eccentricity, each detector can maintain good contact with the surface, ensuring that the contact pressure is evenly distributed in the circumferential direction of the ring surface, thereby improving the representativeness and accuracy of the test data.

[0054] In this embodiment, the inner wall of the cap seat 1101 is configured as a conical surface and abuts against the blocking wheel 1106 , which is rotatably mounted on the top of the rotating arm 1105 ;

[0055] Specifically, it effectively suppresses the jumping or excessive swinging of the rotating arm during high-speed rotation, ensures stable and reliable contact between the roller and the rolling ring surface, prevents contact pressure fluctuations or loss of contact due to jumping, and ensures the stability of the test process and data reliability.

[0056] In this embodiment, driven by the elastic force of each spring 1108, the diameter of the detection area formed by the fence of each rotating arm 1105 is slightly smaller than the outer diameter of the conductive roller.

[0057] In this embodiment, a data collector 10 is installed on the front of the mobile base 2, and the data collector 10 can receive data collected by the roller detector 1103 in real time.

[0058] In this embodiment, the upper slide 1111 is slidably connected with the lower slide 1109 , and a compression spring 1110 is connected between the upper slide 1111 and the lower slide 1109 .

[0059] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A conductive rolling ring contact fatigue test device, characterized in that It includes: A base (7) with a placing table (6) fixed on its tabletop; A backrest (1) fixed on the base (7). On the front of the backrest (1), two symmetric fixing blocks are fixed, and a screw rod is rotatably connected between the two fixing blocks. The screw rod is driven by a first motor (4) fixed on the backrest (1); A nut block threadedly connected to the threaded section of the screw rod; A moving seat (2) with the nut block fixedly connected to its back. On the front of the moving seat (2), a carrier plate (8) is fixed. Two sliding cylinders (5) are fixed on the carrier plate (8), and the sliding cylinders (5) are slidably and matingly connected with sliding columns (3) fixed on the base (7); And a fatigue testing mechanism. There are multiple of them and they are equidistantly installed on the carrier plate (8). Each fatigue testing mechanism can perform smoothness detection on the outer ring surface of the conductive rolling ring loaded on the placing table (6).

2. The conductive rolling ring contact fatigue test device according to claim 1, wherein: The fatigue testing mechanism is composed of a second motor (9), a bearing seat (12), a rotating shaft, and a detection component (11). Among them, the second motor (9) is fixed on the carrier plate (8), the driving end of the second motor (9) is drivingly connected to one end of the rotating shaft, the other end of the rotating shaft passes through the bearing seat (12) fixed on the moving seat (2), and is fixedly connected to the detection component (11).

3. A conductive rolling ring contact fatigue test device according to claim 2, characterized in that: The detection component (11) includes: A cap seat (1101) with a cap rod fixed inside; An upper sliding seat (1111) fixedly connected to the bottom end of the cap rod; A support ring fixedly sleeved on the bottom of the upper sliding seat (1111), and a plurality of convex seats (1102) are fixed on the side wall of the support ring; And a plurality of smoothness detection pieces, which are arranged in an array along the circumferential direction of the upper sliding seat (1111). Each smoothness detection piece is rotatably connected between two corresponding convex seats (1102).

4. A conductive rolling ring contact fatigue test device according to claim 3, characterized in that: The smoothness detection piece includes: A rotating arm (1105) rotatably installed between two convex seats (1102) by a rotating pin (1104); A roller type detector (1103) rotatably installed at the bottom end of the rotating arm (1105); Two stud bolts (1107) respectively installed on the rotating arm (1105) and the top of the cap rod; And a spring (1108) connected between the two stud bolts (1107).

5. The conductive rolling ring contact fatigue test device according to claim 4, characterized in that: The inner wall of the cap seat (1101) is set as a conical surface and abuts against a retaining wheel (1106). The retaining wheel (1106) is rotatably installed on the top of the rotating arm (1105).

6. The conductive rolling ring contact fatigue test device according to claim 5, wherein: Under the elastic force drive of each spring (1108), the radial length of the detection area formed by the enclosures of the rotating arms (1105) is slightly smaller than the outer diameter of the conductive rolling ring.

7. A conductive rolling ring contact fatigue test device according to claim 4, characterized in that: A data collector (10) is installed on the front of the moving seat (2). The data collector (10) can receive the data collected by the roller type detector (1103) in real time.

8. A conductive rolling ring contact fatigue test device according to claim 3, characterized in that: A lower sliding seat (1109) is slidably and matingly connected inside the upper sliding seat (1111), and a compression spring (1110) is connected between the upper sliding seat (1111) and the lower sliding seat (1109).

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