Full-stroke testing device for carbon brush constant-force spring

Abstract

The utility model relates to the technical field of constant-force spring testing, in particular to a carbon brush constant-force spring full-stroke testing device which comprises a controller, a driving motor, a power module, a spring clamp and a tension meter, the controller is electrically connected with the driving motor and the tension meter, and the power module is used for supplying power; the spring clamp comprises a first adapter plate, a force measuring rod, a spring fixing block, a second adapter plate and a spring fixing plate, the first adapter plate is in transmission connection with the driving motor, the tension meter is arranged on the first adapter plate, and the two ends of the force measuring rod are connected with the tension meter hook and the spring fixing block respectively; the spring fixing plate is arranged at the top of the second adapter plate, a first fixing part matched with the constant-force spring coiling structure in shape is formed at the lower end of the spring fixing block and / or the upper end of the spring fixing plate, and a second fixing part matched with the free end of the constant-force spring in shape is formed on the second adapter plate. According to the utility model, the fixture design is improved, dynamic simulation and real-time monitoring are enhanced, and the precision and reliability of the full-stroke test of the constant-force spring are obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to constant force spring test technical field, specifically, relate to a kind of carbon brush constant force spring full stroke testing device. BACKGROUND

[0002] Constant force spring, due to its ability to maintain almost constant output load characteristics during deformation, occupies an important position in industrial applications, especially in large generators. By providing a consistent and uniform pressure, constant force springs ensure the close fit between the carbon brush and the collector ring, which is crucial for efficient and stable transmission of electric current. In addition, constant force springs help reduce electrical losses, improve generator efficiency, and enhance system reliability.

[0003] Despite the above advantages, constant force springs still face many challenges in practical applications, such as temperature changes: temperature fluctuations in the internal environment of the generator can cause the spring material to expand and contract, affecting its elastic properties; humidity factors: high humidity can cause metal parts to corrode, weakening the mechanical properties of the spring; mechanical vibration: long-term exposure to mechanical vibration and repeated stretching and contracting environments can cause the spring material to fatigue, reducing its elasticity and recovery ability; uneven contact: due to the influence of the aforementioned factors, it may cause uneven contact between the carbon brush and the collector ring, causing local overheating, uneven current distribution, and even arcing, threatening the safe operation of the equipment.

[0004] To overcome the above challenges, it is necessary to regularly test the pressure of constant force springs. Pressure testing can help identify trends in constant force spring performance and take timely maintenance measures, such as replacing aging or damaged constant force spring components. This can effectively prevent electrical failures caused by poor contact, extend the service life of the power generation system, and improve its safety and economy.

[0005] Chinese utility model patent CN216899601U provides a detection device for constant force spring, and specifically discloses a mounting shaft for mounting the fixed end of the constant force spring and a clamping mechanism for clamping the free end of the constant force spring. Although the constant force spring detection device provided by the prior art can test the spring performance to some extent, it has significant shortcomings in practical application, including: (1) the device tests the position inside the constant force spring curvature radius, while the actual stress end of the constant force spring for the generator is located outside, resulting in test results that cannot accurately reflect the tension data under actual working conditions; (2) since the free end of the constant force spring for the generator is usually arc-shaped, the clamping part of the device cannot effectively fix this shape, which may cause sliding or displacement during testing, affecting data accuracy and possibly damaging the constant force spring.

[0006] In summary, how to effectively fix the constant force spring and accurately reflect the tension data of the constant force spring in the actual working state is a technical problem to be solved at present. Practical new type content

[0007] The utility model discloses a kind of carbon brush constant force spring full stroke testing devices, by improving fixture design, enhancing dynamic simulation and real-time monitoring, the precision and reliability of constant force spring full stroke test are significantly improved, to solve the technical problem indicated in background art.

[0008] The utility model discloses a kind of carbon brush constant force spring full stroke testing devices, including controller, drive motor, power module, spring fixture and tension meter, the signal output end of the controller is connected with the signal input end of drive motor, the signal output end of the tension meter is connected with the signal input end of controller, the power module is connected with controller, drive motor and tension meter respectively by electricity;

[0009] Among them, the spring fixture includes fixture upper die and fixture lower die;

[0010] The fixture upper die is composed of first adapter plate, force bar and spring fixing block, the first adapter plate is drivingly connected with drive motor, the first adapter plate is configured to reciprocate along the first direction under the drive of drive motor, the tension meter is installed on the first adapter plate, the force bar is arranged along the first direction, and the first end thereof is connected with the hook of the tension meter, and the second end thereof is connected with the spring fixing block;

[0011] The fixture lower die is composed of second adapter plate and spring fixing plate extending along the first direction, the spring fixing plate is connected to the top of the second adapter plate and is arranged in a spaced manner with the spring fixing block, the lower end of the spring fixing block and / or the upper end of the spring fixing plate is formed with a first fixing part adapted to the shape of the constant force spring coil structure, and the second adapter plate is formed with a second fixing part adapted to the shape of the free end of the constant force spring.

[0012] According to a preferred embodiment, the drive motor is arranged on one side of the spring fixture, and the output shaft thereof is arranged along a second direction perpendicular to the first direction, and a transmission assembly is arranged between the output shaft of the drive motor and the first adapter plate, and the transmission assembly is drivingly connected with the output shaft of the drive motor and the first adapter plate respectively.

[0013] According to a preferred embodiment, the transmission assembly is composed of mounting plate, transmission gear and rack.

[0014] The mounting plate is arranged along a third direction perpendicular to the first direction and the second direction, a gear groove is arranged on a side of the mounting plate close to the driving motor, the transmission gear is arranged in the gear groove and fixedly connected with the output shaft of the driving motor, the rack is arranged along the first direction, and a flat end of the rack is fixedly connected with the first side of the first adapter plate, and a toothed end of the rack is engaged with the transmission gear.

[0015] According to a preferred embodiment, the rack is connected to the back of the first adapter plate, and the tension meter is connected to the front of the first adapter plate.

[0016] According to a preferred embodiment, an arc-shaped groove is formed at a lower end of the spring fixing block, and a fixing clasp is formed at an upper end of the spring fixing plate, and the arc-shaped groove and the fixing clasp jointly form a first fixing part matched with an outer shape of the constant force spring coil structure.

[0017] According to a preferred embodiment, the second fixing part is a groove arranged at a top of the second adapter plate.

[0018] According to a preferred embodiment, the groove is arranged through the second adapter plate along the third direction, and a lower end of the spring fixing plate is slidably matched with the groove.

[0019] The force measuring rod is provided with a length adjusting assembly for adjusting a length of the force measuring rod in the first direction.

[0020] According to a preferred embodiment, the device further comprises a base and a mounting support, the mounting support is arranged on the base, the power module and the driver of the driving motor are arranged below the mounting support, the controller is arranged on the front of the mounting support, and the driving motor is arranged above the mounting support.

[0021] According to a preferred embodiment, the base is provided with a screw rod extending along the first direction, a first end of the screw rod is rotatably connected with the base, a lower end of the mounting plate is provided with a threaded sleeve, and a second end of the screw rod is threadedly connected with the threaded sleeve.

[0022] A horizontal adjusting handle is arranged on one side of the mounting plate, and the horizontal adjusting handle is fixedly connected with the mounting plate.

[0023] According to a preferred embodiment, a moving handle is arranged on the base, and the moving handle is arranged on a side of the spring clamp away from the mounting support.

[0024] The technical scheme of the carbon brush constant force spring full stroke testing device has at least the following advantages and beneficial effects: (1) the carbon brush constant force spring full stroke testing device improves the precision and reliability of constant force spring full stroke testing by improving the design of the clamp, enhancing dynamic simulation and real-time monitoring; (2) the adjustable spring fixing plate and the length-adjustable force measuring rod are introduced, the position of the spring clamp and the size of the clamping area can be flexibly adjusted to adapt to constant force springs of different specifications, the universality of the device is improved, the constant force spring can be correctly loaded during testing, data errors caused by mismatching of the spring clamp are reduced, the test result is more accurate and reliable to reflect the actual performance of the constant force spring; (3) the controller accurately controls the driving motor, thereby accurately driving the spring clamp, and the tension value is displayed in real time, the dynamic simulation provided can test under conditions close to actual working conditions, provide a test environment closer to actual working conditions, ensure that the test result has higher reference value, and help users better evaluate the performance of the constant force spring in complex environments. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall structure schematic view of the carbon brush constant force spring full stroke testing device provided for the embodiment 1 of the utility model;

[0026] Figure 2 The structure schematic view of the spring clamp provided for the embodiment 1 of the utility model;

[0027] Figure 3 The rear view of the carbon brush constant force spring full stroke testing device provided for the embodiment 2 of the utility model;

[0028] Figure 4 The structure schematic view of the mounting bracket provided for the embodiment 3 of the utility model;

[0029] The drawings show that: 100 is a base, 110 is a mounting bracket, 120 is a moving handle, 130 is a screw rod, 200 is a spring clamp, 210 is a first adapter plate, 220 is a force measuring rod, 221 is a length adjusting assembly, 230 is a spring fixing block, 231 is an arc-shaped groove, 240 is a second adapter plate, 241 is a groove, 242 is a fixing bolt, 243 is an adjusting bolt, 250 is a spring fixing plate, 251 is a fixing clamp, 300 is a transmission assembly, 310 is a mounting plate, 311 is a threaded sleeve, 312 is a horizontal adjusting handle, 320 is a transmission gear, 330 is a rack, 400 is a power module, 500 is a controller, 600 is a driving motor, 610 is a driving module, and 700 is a tension meter. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Embodiment 1

[0032] Referring to Figure 1 The present embodiment provides a carbon brush constant force spring full stroke testing device, comprising a controller 500, a driving motor 600, a power module 400, a spring clamp 200 and a tension meter 700. The signal output end of the controller 500 is connected with the signal input end of the driving motor 600, for controlling the driving motor 600 to act, realizing the accurate control of the spring clamp 200 and the full stroke testing of the constant force spring to be tested. The signal output end of the tension meter 700 is connected with the signal input end of the controller 500, for measuring and recording the tension change of the constant force spring in the whole stroke, and sending the tension data to the controller 500 for display. The power module 400 is electrically connected with the controller 500, the driving motor 600 and the tension meter 700 respectively, for supplying power to the controller 500, the driving motor 600 and the tension meter 700.

[0033] In some embodiments, the spring clamp 200 can be divided into an upper clamp die and a lower clamp die. The upper clamp die is driven by the driving motor 600 to compress the constant force spring placed between the upper and lower clamp dies, and is reset along with the rebound of the constant force spring when the driving force is released.

[0034] Further, referring to Figure 2As shown, the clamp upper die is composed of a first adapter plate 210, a force bar 220 and a spring fixing block 230; wherein the first adapter plate 210 is in driving connection with the driving motor 600, and is configured to make reciprocating movement along a first direction under the driving of the driving motor 600; the tension meter 700 is installed on the first adapter plate 210, and moves along the first direction with the first adapter plate 210 under the driving of the driving motor 600; the force bar 220 extends along the first direction, and has a first end connected with the hook of the tension meter 700 and a second end connected with the spring fixing block 230; in this embodiment, when the first adapter plate 210 is driven by the driving motor 600 to make reciprocating movement along the first direction, the spring fixing block 230 compresses the coiled structure of the constant force spring, and when the driving force is released, the force of the constant force spring rebounding is collected by the tension meter 700 via the spring fixing block 230 and the force bar 220 and transmitted to the controller 500 for display, so as to realize dynamic simulation and real-time monitoring.

[0035] The clamp lower die is composed of a second adapter plate 240 and a spring fixing plate 250 extending along the first direction; wherein the spring fixing plate 250 is connected to the top of the second adapter plate 240 and is arranged in spaced apart relationship with the spring fixing block 230, so as to prevent the spring fixing block 230 from colliding with the spring fixing plate 250 when the first adapter plate 210 is driven by the driving motor 600 to make reciprocating movement along the first direction; the lower end of the spring fixing block 230 and / or the upper end of the spring fixing plate 250 is formed with a first fixing part adapted to the shape of the coiled structure of the constant force spring, which can be formed by the upper end of the spring fixing plate 250, by the lower end of the spring fixing block 230 or by both, which is not specifically limited here; in some embodiments, an arc-shaped groove 231 is preferably formed at the lower end of the spring fixing block 230, and a fixing clasp 251 is preferably formed at the upper end of the spring fixing plate 250, and the arc-shaped groove 231 and the fixing clasp 251 together form the first fixing part adapted to the shape of the coiled structure of the constant force spring; a second fixing part adapted to the shape of the free end of the constant force spring is formed on the second adapter plate 240, which is preferably a groove 241 opened at the top of the second adapter plate 240 in some embodiments; in the compression stroke, the free end of the constant force spring is limited by the groove 241 and the spring fixing plate 250, and the coiled structure of the constant force spring rolls clockwise towards the second adapter plate 240 under the pushing of the spring fixing block 230, and in the rebound stroke, the coiled structure of the constant force spring rolls counterclockwise in the opposite direction and pushes the spring fixing block 230, and the force of pushing the spring fixing block 230 is collected by the tension meter 700 via the force bar 220 and transmitted to the controller 500 for display.

[0036] Specifically, this invention significantly improves the accuracy and reliability of constant force spring full-stroke testing by improving fixture design, enhancing dynamic simulation, and real-time monitoring. In addition, the controller 500 precisely controls the drive motor 600, thereby achieving precise driving of the spring fixture 200 and displaying the tension value in real time. The provided dynamic simulation can be conducted under conditions close to actual working conditions, providing a test environment that is closer to actual working conditions, ensuring that the test results have higher reference value, and helping users better evaluate the performance of constant force springs in complex environments.

[0037] Example 2

[0038] This embodiment further explains the configuration of the drive motor 600 based on the technical solution provided in Embodiment 1:

[0039] In some embodiments, the drive motor 600 is arranged on one side of the spring clamp 200, and its output shaft extends along a second direction perpendicular to the first direction. A transmission assembly 300 is provided between the output shaft of the drive motor 600 and the first adapter plate 210. The transmission assembly 300 is connected to the output shaft of the drive motor 600 and the first adapter plate 210 respectively.

[0040] Specifically, in this embodiment, see Figure 3 As shown, the transmission assembly 300 consists of a mounting plate 310, a transmission gear 320, and a rack 330. The mounting plate 310 extends along a third direction perpendicular to the first and second directions. A gear groove is formed on the side of the mounting plate 310 near the drive motor 600. The transmission gear 320 is disposed within the gear groove and fixedly connected to the output shaft of the drive motor 600. The rack 330 extends along the first direction, with its flat end fixedly connected to the first side of the first adapter plate 210 and its toothed end meshing with the transmission gear 320. Furthermore, the rack 330 is connected to the back of the first adapter plate 210, the force gauge 700 is connected to the front of the first adapter plate 210, and the force measuring rod 220 is located below the front of the first adapter plate 210.

[0041] It should be noted that under the driving of the driving motor 600, the transmission gear 320 rotates, and since the toothed end of the rack 330 is engaged with the transmission gear 320, the force of the driving motor 600 driving the transmission gear 320 to rotate is converted into the force of driving the rack 330 to move linearly. The rack 330 drives the first adapter plate 210 to move in the first direction under the driving of the driving motor 600, and when the driving motor 600 is reversely driven, the rack 330 drives the first adapter plate 210 to reset in the first direction under the driving of the driving motor 600, so as to realize reciprocating movement and complete a test stroke of the constant force spring. The stroke distance is controlled by the number of rotations of the driving motor 600 in the forward and reverse directions, so that full stroke testing of the constant force spring can be realized.

[0042] Embodiment 3

[0043] This embodiment further illustrates the design of the device versatility based on the technical solutions provided in Embodiment 2.

[0044] In some embodiments, the groove 241 is arranged through the second adapter plate 240 in the third direction, the lower end of the spring fixing plate 250 is slidingly matched with the groove 241, and the spring fixing plate 250 is connected and fixed with the second adapter plate 240 through the adjusting bolt 243; the force bar 220 is provided with a length adjusting assembly 221, and the length adjusting assembly 221 is used for adjusting the length of the force bar 220 in the first direction. The length adjusting assembly 221 can be a length adjusting knob, or an electric adjusting device. When the electric adjusting device is selected, the electric adjusting device is electrically connected with the controller 500, receives the control of the controller 500 to realize the length adjustment and control, and is electrically connected with the power module 400 to be powered by the power module 400. In addition, the length adjusting assembly 221 can also be a component using hydraulic pressure or air pressure as driving force, which is not limited here.

[0045] Further, referring to Figure 4As shown, the device further comprises a base 100 and a mounting bracket 110; wherein the base 100 is provided with a moving handle 120, the moving handle 120 is arranged on the side of the spring clamp 200 away from the mounting bracket 110, and the moving handle 120 can facilitate the movement of the device; the second adapter plate 240 is fixed on the base 100 through a fixing bolt 242; the mounting bracket 110 is arranged on the base 100, the power module 400 and the driver of the driving motor 600 are arranged below the mounting bracket 110, the controller 500 is arranged on the front of the mounting bracket 110, and the driving motor 600 is arranged above the mounting bracket 110. In addition, the base 100 is provided with a screw rod 130 extending in the first direction, the first end of the screw rod 130 is rotationally connected with the base 100, the lower end of the mounting plate 310 is provided with a threaded sleeve 311, and the second end of the screw rod 130 is threadedly connected with the threaded sleeve 311, so that the position of the clamp upper die in the first direction can be adjusted; one side of the mounting plate 310 is provided with a horizontal adjustment handle 312, and the horizontal adjustment handle 312 is fixedly connected with the mounting plate 310, so that the angle of the clamp upper die relative to the output shaft of the driving motor 600 can be adjusted, and then the concentricity of the gear groove and the output shaft of the driving motor 600 can be adjusted.

[0046] Specifically, by introducing the adjustable spring fixing plate 250 and the length-adjustable force measuring rod 220, the position of the spring clamp 200 and the clamping area size can be flexibly adjusted to adapt to different specifications of the constant force spring, and the universality of the device is improved, which ensures that the constant force spring can be correctly loaded during the test, reduces the data error caused by the mismatch of the spring clamp 200, and makes the test result more accurate and reliable to reflect the actual performance of the constant force spring.

[0047] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A carbon brush constant force spring full-stroke testing device, characterized in that, The device includes a controller (500), a drive motor (600), a power module (400), a spring clamp (200), and a force gauge (700). The signal output terminal of the controller (500) is connected to the signal input terminal of the drive motor (600), and the signal output terminal of the force gauge (700) is connected to the signal input terminal of the controller (500). The power module (400) is electrically connected to the controller (500), the drive motor (600), and the force gauge (700). The spring clamp (200) includes an upper clamp mold and a lower clamp mold; The upper mold of the fixture is composed of a first adapter plate (210), a force measuring rod (220) and a spring fixing block (230). The first adapter plate (210) is connected to the drive motor (600) for transmission. The first adapter plate (210) is configured to reciprocate along a first direction under the drive of the drive motor (600). The tension gauge (700) is mounted on the first adapter plate (210). The force measuring rod (220) extends along the first direction, and its first end is connected to the hook of the tension gauge (700) and its second end is connected to the spring fixing block (230). The lower mold of the fixture is composed of a second adapter plate (240) and a spring fixing plate (250) extending along the first direction. The spring fixing plate (250) is connected to the top of the second adapter plate (240) and spaced apart from the spring fixing block (230). The lower end of the spring fixing block (230) and / or the upper end of the spring fixing plate (250) form a first fixing part that matches the shape of the constant force spring coil structure. The second adapter plate (240) forms a second fixing part that matches the shape of the free end of the constant force spring.

2. The carbon brush constant force spring full stroke testing device as described in claim 1, characterized in that, The drive motor (600) is arranged on one side of the spring clamp (200), and its output shaft extends along a second direction perpendicular to the first direction. A transmission assembly (300) is provided between the output shaft of the drive motor (600) and the first adapter plate (210). The transmission assembly (300) is connected to the output shaft of the drive motor (600) and the first adapter plate (210) respectively.

3. The carbon brush constant force spring full stroke testing device as described in claim 2, characterized in that, The transmission assembly (300) consists of a mounting plate (310), a transmission gear (320), and a rack (330); The mounting plate (310) extends along a third direction perpendicular to the first and second directions. A gear groove is provided on the side of the mounting plate (310) near the drive motor (600). The transmission gear (320) is disposed in the gear groove and fixedly connected to the output shaft of the drive motor (600). The rack (330) extends along the first direction, and its flat end is fixedly connected to the first side of the first adapter plate (210), and its toothed end meshes with the transmission gear (320).

4. The carbon brush constant force spring full stroke testing device as described in claim 3, characterized in that, The rack (330) is connected to the back of the first adapter plate (210), and the force gauge (700) is connected to the front of the first adapter plate (210).

5. The carbon brush constant force spring full stroke testing device as described in claim 1, characterized in that, The lower end of the spring fixing block (230) is formed with an arc-shaped groove (231), and the upper end of the spring fixing plate (250) is formed with a fixing clip (251). The arc-shaped groove (231) and the fixing clip (251) together form a first fixing part that is adapted to the shape of the constant force spring coil structure.

6. The carbon brush constant force spring full stroke testing device as described in claim 1, characterized in that, The second fixing part is a groove (241) opened on the top of the second adapter plate (240).

7. The carbon brush constant force spring full stroke testing device as described in claim 6, characterized in that, The groove (241) is provided to penetrate the second adapter plate (240) in a third direction, and the lower end of the spring fixing plate (250) is slidably engaged with the groove (241); The force measuring rod (220) is provided with a length adjustment component (221), which is used to adjust the length of the force measuring rod (220) in the first direction.

8. The carbon brush constant force spring full stroke testing device as described in claim 3, characterized in that, The device also includes a base (100) and a mounting bracket (110), the mounting bracket (110) being mounted on the base (100), the power module (400) and the driver of the drive motor (600) being located below the mounting bracket (110), the controller (500) being located on the front of the mounting bracket (110), and the drive motor (600) being located above the mounting bracket (110).

9. The carbon brush constant force spring full stroke testing device as described in claim 8, characterized in that, The base (100) is provided with a screw (130) extending in a first direction. The first end of the screw (130) is rotatably connected to the base (100). The lower end of the mounting plate (310) is provided with a threaded sleeve (311). The second end of the screw (130) is threadedly connected to the threaded sleeve (311). A horizontal adjustment handle (312) is provided on one side of the mounting plate (310), and the horizontal adjustment handle (312) is fixedly connected to the mounting plate (310).

10. The carbon brush constant force spring full stroke testing device as described in claim 8, characterized in that, The base (100) is provided with a movable handle (120), which is located on the side of the spring clamp (200) facing away from the mounting bracket (110).

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