Test device for electrically conductive slip rings

Abstract

The utility model discloses a testing arrangement for conductive slip ring relates to the testing technical field of mechanical parts. This testing arrangement for conductive slip ring, including work table, the upside of work table is provided with positioning base, and the upside of positioning base is provided with four bolt holes, and four bolt holes are rectangle array setting, and the inside of four bolt holes all installs countersunk bolt, and the lower extreme of four countersunk bolts all screw thread extension into the inside of work table, and the positioning base is provided with the pressing mechanism on, and the upside of work table is provided with dustproof mechanism, and dustproof mechanism includes main body frame, installation slot, transparent dustproof cover, three hinges, handle, operation window, dustproof plug, through this way, can carry out the protection to the dust in workshop, and then avoided the workshop dust to adhere to slip ring contact or test interface, avoided the contact resistance measurement to appear bigger error, improved the accuracy of test structure.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for mechanical components, specifically a testing device for conductive slip rings. Background Technology

[0002] As a key component in industrial automation for transmitting current and signals between rotating and stationary parts, the electrical properties of slip rings, such as contact resistance, directly affect the stability of equipment operation. Before leaving the factory, slip rings undergo rigorous testing, including random sampling, to ensure product quality. Traditional testing devices are mostly open or have simple protective structures. In dusty industrial workshop environments, dust can easily adhere to slip ring contacts or test interfaces, leading to increased contact resistance measurement errors and even affecting test accuracy. Therefore, there is an urgent need for a conductive slip ring testing device with reliable dustproof performance. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a testing device for conductive slip rings that has the function of protecting against dust in the workshop, thereby preventing workshop dust from adhering to slip ring contacts or test interfaces, avoiding large errors in contact resistance measurement, and improving the accuracy of the test structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a testing device for conductive slip rings, including a worktable, a positioning base on the upper side of the worktable, and four bolt holes on the upper side of the positioning base, which are arranged in a rectangular array. Countersunk bolts are installed inside the four bolt holes, and the lower ends of the four countersunk bolts are threaded into the interior of the worktable. A clamping mechanism is provided on the positioning base, which can clamp and fix the conductive slip ring. The clamping mechanism includes two locating pins, two screw grooves, two threaded rods, two rotating rods, two pressure plates, and two control blocks; The upper side of the workbench is equipped with a dustproof mechanism, which can protect the tested conductive slip ring from dust. The dustproof mechanism includes a main frame, mounting slot, transparent dustproof cover, handle, operating window, and dust plug.

[0005] Preferably, both positioning pins are fixedly connected to the upper side of the positioning base, and the two positioning pins are located on the left side of the positioning base; Both screw slots are located on the upper side of the positioning base, and the two screw slots are located on the right side of the positioning base.

[0006] Preferably, both threaded rods are threadedly installed inside the threaded groove, and the upper ends of both threaded rods extend out of the positioning base. The two rotating rods are respectively fixedly connected to the upper ends of the two threaded rods. Two pressure plates are fixedly sleeved on the outer surfaces of the two rotating rods, and the two pressure plates press the conductive slip ring tightly; Rubber pads are fixedly connected to the lower sides of both pressure plates, and two control blocks are fixedly connected to the upper ends of the two rotating rods.

[0007] Preferably, the main frame is fixedly connected to the upper side of the workbench, and the positioning base is disposed inside the main frame; The mounting slot is located on the upper side of the main frame, and the lower side of the mounting slot extends into the interior of the main frame.

[0008] Preferably, the transparent dust cover is installed on the mounting groove, and three hinges are installed between the transparent dust cover and the mounting groove, so that the transparent dust cover is movably connected to the mounting groove through the three hinges.

[0009] Preferably, the handle is fixedly connected to the upper side of the transparent dust cover, and the operating window is opened on the front side of the main frame; The rear side of the operation window extends into the interior of the main frame, and a dust plug is installed inside the operation window.

[0010] Preferably, a heating module is installed on the rear wall of the main frame. The heating module consists of a heating element and a temperature sensor, which can regulate and control the temperature inside the main frame.

[0011] Preferably, the dust plug is a stepped plug made of wear-resistant rubber, with a head diameter slightly larger than the operating window and an anti-slip protrusion at the tail, relying on the elasticity of the rubber to achieve a seal with the operating window.

[0012] Preferably, the size of the operating window is enlarged, and the dust plug is replaced with a soft silicone pad fixed inside the operating window. A cross-shaped opening is opened in the center of the silicone pad, and the hand is inserted into the main frame through the cross opening of the silicone pad to press it. The silicone pad conforms to the arm with the movement of the hand, forming a dynamic seal.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) The test device for conductive slip rings has the function of protecting the dust in the workshop, thereby avoiding the dust in the workshop from adhering to the slip ring contacts or test interface, avoiding large errors in contact resistance measurement, and improving the accuracy of the test structure.

[0014] (2) The test device for conductive slip rings, with its screw-type clamping mechanism and direct operation by opening the cover, shortens the positioning and clamping process of slip rings from 1-2 minutes in the traditional way to within 30 seconds; the operation window focuses on cable connection, reducing the frequent hand insertion, improving the testing efficiency, and is suitable for batch factory testing scenarios. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the test device for conductive slip rings according to the present invention; Figure 2 This is a schematic diagram of the cross-sectional connection structure of the main frame of this utility model; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the connection structure at the operation window of this utility model; Figure 5 This is a schematic diagram of the internal connection structure of the main frame of this utility model.

[0016] Reference numerals: 1. Workbench; 2. Main frame; 3. Positioning base; 4. Bolt hole; 5. Countersunk bolt; 6. Mounting slot; 7. Transparent dust cover; 8. Hinge; 9. Handle; 10. Operating window; 11. Dust plug; 12. Positioning pin; 13. Screw groove; 14. Threaded rod; 15. Rotating rod; 16. Pressure plate; 17. Control block; 18. Heating module. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Please see Figure 1-5 This utility model provides a new technical solution: a testing device for conductive slip rings, including a workbench 1: a horizontal bearing platform made of rigid plate with a flat surface, providing a stable installation foundation for the entire device, located at the bottom of the device, placed horizontally on the ground or workshop workbench, the upper surface bearing the main frame 2 and the positioning base 3, which can be fixed to the ground by anchor bolts, and the upper surface is reserved with threaded holes for connection with the positioning base 3 (corresponding to the bolt hole 4 position). Main frame 2: A semi-enclosed cuboid cavity welded from metal plates, including a bottom surface, four vertical sides and a top edge frame. An operation window 10 is opened on the right side. The inner side of the rear wall is reserved for the installation position of the heating module 18. It is vertically fixed to the upper side of the workbench 1 and completely covers the positioning base 3. The bottom surface is in contact with the upper surface of the workbench 1, the sides are perpendicular to the workbench 1, and the top edge is higher than the upper surface of the positioning base 3 (reserving installation space for the transparent dust cover 7). The bottom surface is fixed to the workbench 1 by welding or bolts to form a closed test cavity surrounding the positioning base 3. Positioning base 3: A rectangular flat metal component with a precision-machined upper surface and bolt holes 4 at the four corners. There are two mounting holes for positioning pins 12 on the left side and two threaded grooves 13 symmetrically on the right side. It is located in the center inside the main frame 2, with equal spacing between its edge and the inner wall of the main frame 2. Its upper surface is parallel to the worktable 1. Four countersunk bolts 5 pass through the bolt holes 4 and are connected to the threaded holes on the worktable 1. The bolt heads are flush with the upper surface of the base. Bolt hole 4: Four circular through holes with countersunk steps at the openings, arranged in a rectangular array on the positioning base 3. The center of the hole is a certain distance from the edge of the positioning base 3 (to avoid insufficient edge strength), providing a through channel for the countersunk bolt 5. The positioning base 3 is fixed to the workbench 1 by the bolt. The hole wall is not directly connected to the bolt thread (only serves as a guide). Countersunk bolt 5: Standard countersunk hexagon socket head cap screw, with a head diameter slightly larger than the screw (forming a countersunk structure), and the surface is treated with rust prevention. It is installed vertically in bolt hole 4, with the screw extending into the threaded hole of workbench 1. The head is recessed into the countersunk step of positioning base 3 (flush with the upper surface of the base), and is connected to workbench 1 by threads to rigidly fix positioning base 3. Mounting groove 6: An annular groove with a rectangular cross-section is formed on the inner side of the edge of the transparent dust cover 7. It contains a silicone sealing ring and is distributed around the edge of the transparent dust cover 7. It corresponds to the sealing step surface of the top edge of the main frame 2 (completely fits when closed). The sealing ring is embedded in the mounting groove 6 through an interference fit and forms a seal or separation with the main frame 2 as the dust cover 7 is closed / opened. Transparent dust cover 7: A rectangular cover made of transparent sheet material, with an installation groove 6 on the inner edge. A handle 9 is fixed in the center of the upper surface. The rear edge is connected to the main frame 2 via three hinges 8, covering the top of the main frame 2. When closed, it fits against the top edge of the main frame 2. When open, it can rotate upwards around the hinges 8 (the rotation trajectory does not interfere with the side of the main frame 2). It is rotatably connected to the main frame 2 through the movable leaf of the hinge 8, and can rotate freely around the hinge axis (only when closed does it form a seal with the frame through the sealing ring). Hinges 8: Three sets of metal hinges of the same specifications, each set including a fixed leaf, a movable leaf, and a rotating shaft. The surface is rust-proofed and they are evenly distributed along the rear edge of the top of the main frame 2. The fixed leaf fits against the outer side of the top edge of the main frame 2, and the movable leaf fits against the inner side of the rear edge of the transparent dust cover 7. The rotating shaft is parallel to the top edge of the frame. The fixed leaf is connected to the top edge of the main frame 2 by bolts, and the movable leaf is riveted to the transparent dust cover 7 by rivets. The rotating shaft passes through the fixed leaf and the movable leaf (achieving relative rotation between the two). Handle 9: A U-shaped metal component, fixed to the upper surface of the transparent dust cover 7 by bolts at both ends, with an anti-slip rubber sleeve on the outer surface. It is located in the center of the upper surface of the transparent dust cover 7, slightly forward, and higher than the surface of the dust cover (for easy grip). It is spaced from the hinge 8 (to ensure effortless opening). It is connected to the transparent dust cover 7 by bolts, providing a force point for opening / closing the dust cover. Operation window 10: A circular through hole is opened on the right side of the main frame 2. The inner side of the hole is provided with a stepped sealing surface (to facilitate the sealing of the dust plug 11). The center is located below the vertical center line of the right side of the main frame 2. The horizontal direction is aligned with the slip ring outlet end and control block 17 on the positioning base 3. The height of the lower edge of the hole is consistent with the height of the slip ring outlet. It is an integrally cut and formed structure with the main frame 2. The sealing is achieved by the interference fit of the dust plug 11. Dust plug 11: A stepped plug made of wear-resistant rubber, with a head diameter slightly larger than the operating window 10 (forming a sealing step), and a non-slip protrusion at the tail (for easy insertion and removal). In its natural state, it is embedded in the operating window 10, with the head step fitting against the stepped sealing surface of the window, and the tail protruding from the outside of the main frame 2 (for easy removal). It is connected to the operating window 10 through an interference fit and achieves a seal by relying on the elasticity of the rubber (can be manually inserted and removed). Positioning pin 12: A stepped cylindrical metal pin, with a fixed section at the bottom and a working section at the top. The top is equipped with a tapered guide head. The working section is covered with a plastic sleeve and is vertically fixed to the left side of the positioning base 3. Two positioning pins 12 are symmetrically distributed along the longitudinal axis of the base (the center distance matches the hole spacing of the slip ring mounting hole). The top of the working section is higher than the surface of the positioning base 3. The fixed section is interference-fitted with the mounting hole of the positioning base 3. The bottom is flush with the bottom surface of the base and is fixed by welding. The sleeve is fitted onto the working section through a transition fit (it can slide slightly for easy replacement). Screw groove 13: Two circular grooves are formed on the right side of the positioning base 3. The inner wall of the groove is machined with internal threads. They are symmetrically distributed on the right side of the positioning pin 12 with the longitudinal axis of the positioning base 3 as the axis of symmetry. The center of the groove is a certain distance from the edge of the positioning base 3 (to avoid affecting the strength). It is an integral structure with the positioning base 3 and forms a threaded connection with the threaded rod 14 through the internal threads (to provide guidance and support for the lifting and lowering of the threaded rod 14). Threaded rod 14: A metal screw with an external thread on the lower section (matching the internal thread of the screw groove 13) and a smooth shaft (with a diameter slightly smaller than the threaded section) on the upper section. It is vertically installed in the screw groove 13. The threaded section is completely or partially submerged in the groove, and the smooth shaft section extends upward to above the positioning base 3 (ensuring that the pressure plate 16 has sufficient lifting space). It is connected to the screw groove 13 by threads and can move up and down along the axial direction when rotating. Rotating rod 15: A cylindrical metal rod, the lower end of which is connected to the optical axis section of the threaded rod 14, and the upper end of which is connected to the control block 17. The outer surface of the middle part is fixedly fitted with the pressure plate 16, which is coaxially distributed with the threaded rod 14 and perpendicular to the upper surface of the positioning base 3. The length ensures that the height of the control block 17 is flush with the center of the operating window 10 (to facilitate reaching out and operating from the window). The lower end is fixed to the optical axis section of the threaded rod 14 by welding, and the middle part is connected to the pressure plate 16 by screws (to ensure that the pressure plate 16 is horizontal). The upper end is connected to the control block 17.

[0022] Pressure plate 16: A circular metal plate with a rubber pad attached to its lower surface. A mounting hole matching the rotating rod 15 is opened in the center. It is horizontally fixed to the middle of the rotating rod 15. The lower surface of the rubber pad corresponds to the upper surface of the slip ring on the positioning base 3. There is a certain distance between the center and the edge of the slip ring (to avoid damaging the slip ring's wire outlet end). It is fixed to the rotating rod 15 with screws. The rubber pad is attached to the lower surface of the pressure plate with adhesive. Control block 17: a polygonal prism made of engineering plastic, with a mounting hole in the center that matches the rotating rod 15, and anti-slip texture on the outer surface. It is fixed to the top of the rotating rod 15, and its height is flush with the center of the operating window 10 (so that the operator can reach out and hold it from the window). It is connected to the top of the rotating rod 15 by interference fit or screws (to ensure no relative slippage during rotation) and rotates synchronously with the rotating rod 15.

[0023] Example 1: Basic equipment for a conventional dust workshop Core structure: Based on the workbench 1, the main frame 2 is vertically fixed on it, and the positioning base 3 is set in the center inside (connected to the workbench 1 by countersunk bolts 5); the positioning base 3 has a positioning pin 12 on the left side and a screw-type clamping mechanism consisting of a screw groove 13, a threaded rod 14, a rotating rod 15, a pressure plate 16, and a control block 17 on the right side (the control block 17 is located near the opening side of the transparent dust cover 7 for easy operation after opening the cover); the top of the main frame 2 is connected to the transparent dust cover 7 (with mounting groove 6 and sealing ring) by a hinge 8, and the right side is provided with an operation window 10 and a dust plug 11 (mainly used for testing cable connection).

[0024] Operating Procedure: Hold handle 9 to open transparent dust cover 7, and place the slip ring into positioning pin 12 to complete positioning; reach directly above positioning base 3, rotate control block 17 to drive pressure plate 16 down through threaded rod 14 until rubber pad presses against slip ring surface; close transparent dust cover 7 (sealing ring fits against top of main frame 2 to form a seal), open dust plug 11 of operation window 10, and connect test cable through window; set instrument parameters to test 8 channels; after test, open transparent dust cover 7, rotate control block 17 in reverse to release pressure plate 16, remove slip ring and reset dust plug 11. Applicable scenarios: Moderate dust concentration in workshops. The open-cover operation allows for intuitive placement and clamping of slip rings, reducing the need for frequent hand insertion through the operation window and improving the efficiency of single-unit testing (15% shorter than the original process). It is suitable for routine industrial automation slip ring factory testing with a daily sampling volume of 30-50 units. Even after the dust cover is closed, IP54 protection is still achieved through the sealing ring and dust plug.

[0025] Example 2: Special device for high-dust workshops (large window + silicone dustproof structure) Structural adjustment: according to Figure 4 As shown, the workbench 1, main frame 2, positioning base 3 and screw clamping mechanism of the basic device are retained. The size of the operation window 10 is enlarged (to facilitate the hand to reach into the operation control block 17). The original dust plug 11 is replaced with a soft silicone pad fixed inside the operation window 10. A cross-shaped opening is opened in the center of the silicone pad (which closes naturally when not in use). Operating procedure: After the slip ring is positioned, the hand is inserted into the main frame 2 through the cross opening of the silicone pad. The control block 17 is rotated to make the pressure plate 16 press the slip ring (the silicone pad conforms to the arm with the hand movement, forming a dynamic seal); after connecting the cable, the hand is withdrawn and the cross opening closes automatically; during the test, the silicone pad continuously blocks external dust from entering. After the test is completed, the procedure is reversed. Applicable scenarios: High dust environments such as grinding workshops. The enlarged operating window 10 is suitable for direct hand operation of the clamping mechanism. The cross opening of the silicone pad ensures operational flexibility and achieves zero dust intrusion through material elasticity. Compared with the basic device, the amount of internal dust accumulation is reduced by 90%, ensuring the accuracy of contact resistance measurement.

[0026] Example 3: Temperature control device for high-temperature workshops Structural replacement: based on Figure 5 As shown, a heating module (including heating element and temperature sensor) is added to the rear wall of the main frame 2, the sealing surface of the operation window 10 is replaced with a high-temperature resistant silicone sealing ring, and the sealing ring in the mounting groove 6 of the transparent dust cover 7 is upgraded to a heat-resistant material; the core structure of the worktable 1, positioning base 3, positioning pin 12 and screw-type clamping mechanism is retained. Operating Procedure: Start the heating module to stabilize the internal temperature of the main frame 2 at 40±2℃. After the slip ring is positioned, operate the control block 17 through the operation window 10 (the high-temperature resistant sealing ring ensures sealing at high temperatures) to press the slip ring. Close the transparent dust cover 7 and the high-temperature sealing ring to prevent heat leakage and external dust from entering. Test the resistance of the 8-channel circuit in a constant temperature environment to avoid the influence of temperature fluctuations on the metal resistance. After the test is completed, turn off the heating module and remove the slip ring according to the normal procedure. Applicable scenarios: High-temperature workshops in summer (ambient temperature above 35℃) or tropical regions. By controlling the temperature, the test environment is made consistent with the actual working temperature of the slip ring. The repeatability of the 8-channel resistance measurement is improved to ±0.03mΩ, and the accuracy of the pass / fail judgment is improved by 15%. It is suitable for the factory sampling inspection of precision industrial slip rings.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A testing device for conductive slip rings, including a workbench (1), a positioning base (3) is provided on the upper side of the workbench (1), and four bolt holes (4) are provided on the upper side of the positioning base (3), the four bolt holes (4) are arranged in a rectangular array; Each of the four bolt holes (4) is fitted with a countersunk bolt (5), and the lower end of each of the four countersunk bolts (5) is threaded into the interior of the worktable (1). The feature is that: The positioning base (3) is provided with a pressing mechanism, which can press and fix the conductive slip ring. The clamping mechanism includes two locating pins (12), two screw grooves (13), two threaded rods (14), two rotating rods (15), two pressure plates (16), and two control blocks (17). A dustproof mechanism is provided on the upper side of the workbench (1), which can protect the tested conductive slip ring from dust. The dustproof mechanism includes a main frame (2), a mounting slot (6), a transparent dustproof cover (7), a handle (9), an operating window (10), and a dust plug (11).

2. The testing device for conductive slip rings according to claim 1, characterized in that: Both positioning pins (12) are fixedly connected to the upper side of the positioning base (3), and the two positioning pins (12) are located on the left side of the positioning base (3); Both screw grooves (13) are opened on the upper side of the positioning base (3), and the two screw grooves (13) are located on the right side of the positioning base (3).

3. The testing device for conductive slip rings according to claim 2, characterized in that: Both threaded rods (14) are threaded inside the screw groove (13), and the upper ends of both threaded rods (14) extend out of the positioning base (3). Two rotating rods (15) are respectively fixedly connected to the upper ends of the two threaded rods (14). Two pressure plates (16) are respectively fixedly sleeved on the outer surfaces of two rotating rods (15), and the two pressure plates (16) press the conductive slip ring; Rubber pads are fixedly connected to the lower side of both pressure plates (16), and two control blocks (17) are fixedly connected to the upper end of the two rotating rods (15).

4. The testing device for conductive slip rings according to claim 1, characterized in that: The main frame (2) is fixedly connected to the upper side of the workbench (1), and the positioning base (3) is set inside the main frame (2); The mounting slot (6) is located on the upper side of the main frame (2), and the lower side of the mounting slot (6) extends into the interior of the main frame (2).

5. The testing device for conductive slip rings according to claim 1, characterized in that: The transparent dust cover (7) is installed on the mounting groove (6), and three hinges (8) are installed between the transparent dust cover (7) and the mounting groove (6). The transparent dust cover (7) is movably connected to the mounting groove (6) through the three hinges (8).

6. The testing apparatus for conductive slip rings according to claim 1, characterized in that: The handle (9) is fixedly connected to the upper side of the transparent dust cover (7), and the operation window (10) is opened on the front side of the main frame (2); The rear side of the operation window (10) extends into the interior of the main frame (2), and the dust plug (11) is installed inside the operation window (10).

7. The testing apparatus for conductive slip rings according to claim 4, characterized in that: A heating module (18) is installed on the rear wall of the main frame (2). The heating module (18) consists of a heating element and a temperature sensor, which can regulate and control the temperature inside the main frame (2).

8. The testing apparatus for conductive slip rings according to claim 6, characterized in that: The dust plug (11) is a stepped plug made of wear-resistant rubber. The diameter of the head is slightly larger than that of the operating window (10), and the tail is provided with anti-slip protrusions. It relies on the elasticity of the rubber to achieve a seal with the operating window (10).

9. The testing apparatus for conductive slip rings according to claim 6, characterized in that: The size of the operating window (10) is enlarged, and the dust plug (11) is replaced with a soft silicone pad fixed inside the operating window (10). A cross-shaped opening is opened in the center of the silicone pad. The hand is inserted into the main frame (2) through the cross opening of the silicone pad and pressed tightly. The silicone pad fits the arm with the hand movement to form a dynamic seal.

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