A durability test bench with continuously adjustable amplitude

Abstract

The present invention relates to a durability test bench with continuously adjustable amplitude, comprising a workbench, a frame, an adjustable eccentric wheel assembly, a connecting plate and a mandrel, wherein a jack is provided on the workbench, and the end of the frame is fixedly connected to the outer wall of the workbench. The vibration amplitude of the tested sample can be adjusted by rotating the screw rod to adjust the distance between the slider and the center of the driven wheel. The greater the distance between the slider and the center of the driven wheel, the greater the vibration amplitude of the tested sample. Conversely, the smaller the distance between the slider and the center of the driven wheel, the smaller the vibration amplitude of the tested sample. This facilitates testing the durability of the current collector in different vibration amplitudes, and solves the problem that the existing vibration durability test bench can usually only adjust the frequency of vibration during testing, but cannot adjust the amplitude of vibration, resulting in inconvenience in testing.

Description

Technical Field

[0001] The invention relates to the technical field of test benches, and in particular to an endurance test bench with continuously adjustable amplitude. Background Art

[0002] The current collector, also known as the collector shoe, is a set of dynamic current collecting equipment installed on the train bogie to dynamically draw current from the rigid power supply rail (third rail) for the train to meet the train's power needs. The train current collector needs to undergo a certain period of endurance test at the specified frequency and amplitude.

[0003] The existing vibration durability test bench can usually only adjust the vibration frequency during the test, but cannot adjust the vibration amplitude. For example, the vibration amplitude of the cam-type vibration durability test bench depends on the eccentricity of the cam and the arm length of the crankshaft, which makes it impossible to adjust the amplitude during the test. If the durability of the current collector at different vibration amplitudes needs to be tested, multiple vibration durability test benches of different models need to be used, which makes the test inconvenient. Summary of the invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a durability test bench with continuously adjustable amplitude. During the test, the vibration frequency and amplitude applied to the current receiver can be adjusted, thereby facilitating the testing of the durability of the current receiver at different vibration amplitudes. This solves the problem that the existing vibration durability test bench can usually only adjust the vibration frequency but not the vibration amplitude during the test, resulting in inconvenience in testing.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0006] A durability test bench with continuously adjustable amplitude, comprising a workbench, a frame, an adjustable eccentric wheel assembly, a connecting plate and a push rod, wherein the workbench is provided with a socket, the end of the frame is fixedly connected to the outer wall of the workbench, the frame comprises a supporting frame, the adjustable eccentric wheel assembly comprises a driven wheel, a fixing frame, an adjusting rod, a screw rod, a sliding block and a connecting shaft, the driven wheel is rotatably connected to the supporting frame, the fixing frame is arranged on the side of the driven wheel away from the supporting frame, and the fixing frame is provided with a connecting rod connected to the outer wall of the driven wheel. The outer wall of the adjusting rod is rotatably connected to the inner wall of the through hole, the end of the screw rod is fixedly connected to the end of the adjusting rod facing the central axis of the driven wheel, the slider is provided with a screw hole, the outer wall of the screw rod is screwed with the inner wall of the screw hole, the connecting shaft is arranged on the side of the slider away from the driven wheel, the end of the connecting plate is rotatably connected to the connecting shaft, the push rod is inserted into the socket, and the end of the push rod facing the driven wheel is rotatably connected to the end of the connecting plate away from the connecting shaft.

[0007] Further optionally, the durability test bench also includes a power mechanism, which includes a rotating shaft, a driven pulley, a variable frequency motor, a driving pulley and a belt, the rotating shaft is rotatably connected to the support frame, one end of the rotating shaft is fixedly connected to the middle part of the outer wall of the driven pulley, and the other end of the rotating shaft is fixedly connected to the middle part of the outer wall of the driven pulley, the variable frequency motor is arranged on the frame, the driving pulley is arranged at the output end of the variable frequency motor, and the belt connects the driven pulley and the driving pulley.

[0008] Further optionally, a limiting block is provided on the side of the sliding block facing the driven wheel, a limiting groove is provided on the outer wall of the driven wheel, and the outer wall of the limiting block is slidably connected to the inner wall of the limiting groove.

[0009] Further optionally, a mark is provided on the outer wall of the driven wheel facing the slider, and a pointer is provided on the outer wall of the slider, with the tip of the pointer facing the mark.

[0010] Further optionally, the outer wall of the driven wheel is provided with a reinforcing limit plate, and the end of the screw rod away from the adjusting rod is in contact with the outer wall of the reinforcing limit plate.

[0011] Further optionally, the end of the push rod facing the connecting plate is fixedly connected with a slot plate, and the end of the slot plate away from the push rod is rotatably connected to the end of the connecting plate away from the connecting shaft.

[0012] Further optionally, a sample clamp is provided at the end of the push rod away from the slot plate.

[0013] Further optionally, a linear bearing is provided on the inner wall of the insertion hole, and the inner wall of the linear bearing is slidably connected to the outer wall of the push rod.

[0014] Further optionally, the frame also includes a base plate and a plurality of support rods, the support frame is arranged on the base plate, one end of the support rod is fixedly connected to the outer wall of the workbench, and the other end of the support rod is fixedly connected to the outer wall of the base plate.

[0015] Further optionally, the rack also includes a plurality of adjustable feet, and the adjustable feet are arranged on the outer side of the base plate.

[0016] The endurance test bench with continuously adjustable amplitude of the present invention has the following beneficial effects:

[0017] The durability test bench is provided with a socket on the workbench, and the push rod is plugged into the socket, so that the push rod can only move up and down; a screw rod is provided on the outer wall of the driven wheel, and a slider is screwed on the outer wall of the screw rod, and the outer wall of the slider is limited by the outer wall of the driven wheel, so that when the screw rod is rotated, the distance between the slider and the center of the driven wheel can be adjusted; a connecting shaft is provided on the outer wall of the slider, and the connecting shaft is rotatably connected to the connecting plate, and the connecting plate is rotatably connected to the push rod. When the driven wheel rotates, the slider is driven to rotate around the central axis of the driven wheel, so that the connecting plate swings and the push rod moves up and down, and the push rod is connected to the tested sample. The test sample is then driven to vibrate. During the test, the distance between the slider and the center of the driven wheel is adjusted by rotating the screw rod, so as to adjust the vibration amplitude of the test sample. The greater the distance between the slider and the center of the driven wheel, the greater the vibration amplitude of the test sample. Conversely, the smaller the distance between the slider and the center of the driven wheel, the smaller the vibration amplitude of the test sample. This makes it easy to test the durability of the current collector in different vibration amplitudes, and solves the problem that the existing vibration durability test bench can usually only adjust the vibration frequency but not the vibration amplitude during the test, resulting in inconvenience in testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of a top rod and its connection structure according to an embodiment of the present invention;

[0020] Figure 3 It is a structural schematic diagram of an adjustable eccentric wheel assembly according to an embodiment of the present invention;

[0021] Figure 4 A side cross-sectional view of an adjustable eccentric wheel assembly according to an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the power mechanism of an embodiment of the present invention.

[0023] [Description of Reference Numerals]

[0024] 100: workbench; 200: frame; 300: adjustable eccentric wheel assembly; 400: connecting plate; 500: ejector rod; 600: slot plate; 700: specimen clamp; 800: power mechanism; 900: linear bearing;

[0025] 110: jack; 210: support frame; 220: bottom plate; 230: support rod; 240: adjustable foot; 310: driven wheel; 320: fixed frame; 330: adjustment rod; 340: screw rod; 350: slider; 360: connecting shaft; 370: mark; 380: pointer; 390: reinforced limit plate; 810: rotating shaft; 820: driven pulley; 830: variable frequency motor; 840: driving pulley; 850: belt;

[0026] 311: limiting groove; 321: through hole; 351: screw hole; 352: limiting block. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-4 As shown, the present invention provides a durability test bench with continuously adjustable amplitude, comprising a workbench 100, a frame 200, an adjustable eccentric wheel assembly 300, a connecting plate 400 and a mandrel 500;

[0031] The upper surface of the workbench 100 is preferably a plane, and the workbench 100 can be round or square. The workbench 100 is provided with a socket 110, and the socket 110 is preferably arranged at the front of the workbench 100;

[0032] The end of the frame 200 is fixedly connected to the outer wall of the workbench 100, and the frame 200 supports the workbench 100. The frame 200 includes a support frame 210, and the support frame 210 is preferably in a plate shape;

[0033] The adjustable eccentric wheel assembly 300 includes a driven wheel 310, a fixing frame 320, an adjusting rod 330, a screw 340, a slider 350 and a connecting shaft 360. The driven wheel 310 is rotatably connected to the support frame 210. The driven wheel 310 is vertically arranged. The external power mechanism drives the driven wheel 310 to rotate. The fixing frame 320 is arranged on the side of the driven wheel 310 away from the support frame 210. The fixing frame 320 is preferably arranged at the outer end of the side wall of the driven wheel 310. The fixing frame 320 can be fixed by screws or other methods. A through hole 321 parallel to the outer wall of the driven wheel 310 is provided on the fixing frame 320. The outer wall of the adjusting rod 330 is rotatably connected to the inner wall of the through hole 321. In order to facilitate the rotation of the adjusting rod 330, a hand wheel can be arranged on the outer end of the adjusting rod 330. The end of the screw 340 is connected to the adjusting rod 3 30 is fixedly connected to the end of the central axis of the driven wheel 310, a screw hole 351 is provided on the slider 350, the outer wall of the screw rod 340 is screwed to the inner wall of the screw hole 351, the outer wall of the slider 350 is fitted and limited with the outer wall of the driven wheel, when the adjusting rod 330 is rotated to drive the screw rod 340 to rotate, the slider 350 can slide on the outer wall of the driven wheel, thereby adjusting the distance between the slider 350 and the central axis of the driven wheel, the connecting shaft 360 is arranged on the side of the slider 350 away from the driven wheel 310, the end of the connecting plate 400 is rotatably connected to the connecting shaft 360, the connecting plate 400 can be plate-shaped or rod-shaped, the connecting plate 400 can rotate around the connecting shaft 360, the push rod 500 is plugged into the socket 110, and the end of the push rod 500 facing the driven wheel 310 is rotatably connected to the end of the connecting plate 400 away from the connecting shaft 360.

[0034] The push rod is plugged into the socket so that the push rod 500 can only move up and down. When the external power mechanism drives the driven wheel to rotate, it drives the slider to rotate around the central axis of the driven wheel, causing the connecting plate to swing and the push rod 500 to move up and down. The push rod is connected to the test sample, thereby driving the test sample to vibrate. During the test, when the adjusting rod 330 is rotated clockwise, the slider 350 moves outward along the extension direction of the lead screw 340, the distance between the slider 350 and the center of the driven wheel 310 increases, and the vibration amplitude of the test sample increases. Conversely, when the adjusting rod 330 is rotated counterclockwise, the distance between the slider and the center of the driven wheel decreases, and the vibration amplitude of the test sample decreases, thereby facilitating the testing of the durability of the current receiver at different vibration amplitudes, thereby solving the problem that the existing vibration durability test bench can usually only adjust the vibration frequency but not the vibration amplitude during the test, resulting in inconvenience in testing.

[0035] See also Figure 1 and Figure 5As shown, the durability test bench also includes a power mechanism 800, which includes a rotating shaft 810, a driven pulley 820, a variable frequency motor 830, a driving pulley 840 and a belt 850. The rotating shaft 810 is rotatably connected to the support frame 210, one end of the rotating shaft 810 is fixedly connected to the middle part of the outer wall of the driven pulley 310, and the other end of the rotating shaft 810 is fixedly connected to the middle part of the outer wall of the driven pulley 820. The variable frequency motor 830 is arranged on the frame 200, and the driving pulley 840 is arranged at the output end of the variable frequency motor 830. The belt 850 connects the driven pulley 820 and the driving pulley 840. The variable frequency motor 830 drives the driven pulley 820 to rotate through the belt 850, and then drives the driven wheel to rotate. By adjusting the rotation frequency of the variable frequency motor 830, the vibration frequency of the tested sample can be changed, thereby facilitating the durability of the current collector at different vibration frequencies.

[0036] See also Figure 3 and Figure 4 As shown, a limit block 352 is provided on the side of the slider 350 facing the driven wheel 310. The limit block 352 is preferably a rectangular limit block. A limit groove 311 is provided on the outer wall of the driven wheel 310. The outer wall of the limit block 352 is slidably connected to the inner wall of the limit groove 311, thereby ensuring the stability of the sliding of the slider 350.

[0037] In some embodiments, a mark 370 is provided on the outer wall of the driven wheel 310 facing the slider 350, and a pointer 380 is provided on the outer wall of the slider 350. The tip of the pointer 380 faces the mark 370. The mark 370 can be a length mark of 1-50 cm. Marks of other lengths can also be set according to actual needs. The mark scale is indicated by the pointer 380, which facilitates accurate adjustment of the amplitude.

[0038] In some embodiments, a reinforcing limit plate 390 is provided on the outer wall of the driven wheel 310. The reinforcing limit plate 390 is preferably a 1 / 4 circular plate. Preferably, reinforcing limit plates 390 are provided on both sides of the driven wheel 310. The reinforcing limit plate 390 can be fixed by bolts, and the end of the lead screw 340 away from the adjusting rod 330 is in contact with the outer wall of the reinforcing limit plate 390, thereby preventing damage through the strength of the driven wheel 310 and preventing the slider from detaching from the lead screw.

[0039] See also Figure 1 and Figure 2 As shown, the end of the push rod 500 facing the connecting plate 400 is fixedly connected to the slot plate 600, and the end of the slot plate 600 away from the push rod 500 is rotatably connected to the end of the connecting plate 400 away from the connecting shaft 360.

[0040] In some embodiments, a sample clamp 700 is provided at the end of the push rod 500 away from the slot plate 600. The sample clamp 700 is used to fix the test sample. The sample clamp 700 can be fixed by bolts. The sample clamp 700 can be replaced according to the actual test object. This application does not limit the specific structure of the sample clamp 700.

[0041] In some embodiments, a linear bearing 900 is disposed on the inner wall of the insertion hole 110 , and the inner wall of the linear bearing 900 is slidably connected to the outer wall of the ejector rod 500 .

[0042] See also Figure 1 As shown, the frame 200 also includes a base plate 220 and a plurality of support rods 230 . The support frame 210 is arranged on the base plate 220 . One end of the support rod 230 is fixedly connected to the outer wall of the workbench 100 , and the other end of the support rod 230 is fixedly connected to the outer wall of the base plate 220 .

[0043] In some embodiments, the rack 200 further includes a plurality of adjustable feet 240 , which are disposed on the outside of the bottom plate 220 , thereby facilitating the leveling of the device and facilitating testing.

[0044] According to the above technical features, the working principle of the durability test bench provided by this application in actual application scenarios is:

[0045] When the durability test bench is in use, the current collector is fixed to the top of the push rod 500 through the sample clamp 700. When the power mechanism 800 is working, the power mechanism 800 drives the driven wheel to rotate, which drives the slider to rotate around the central axis of the driven wheel, causing the connecting plate to swing, and the push rod 500 to move up and down. The push rod is connected to the tested sample, thereby driving the tested sample to vibrate.

[0046] During the test, when the adjusting rod 330 is rotated clockwise, the slider 350 moves outward along the extension direction of the lead screw 340, the distance between the slider 350 and the center of the driven wheel 310 increases, and the vibration amplitude of the tested sample increases. Conversely, when the adjusting rod 330 is rotated counterclockwise, the distance between the slider and the center of the driven wheel decreases, and the vibration amplitude of the tested sample decreases, thereby facilitating the testing of the durability of the current receiver at different vibration amplitudes, and solving the problem of the existing vibration durability test bench, which can usually only adjust the frequency of the vibration but not the amplitude of the vibration during the test, resulting in inconvenience in the test.

[0047] Unless otherwise specifically stated, the relative arrangement of the parts set forth in these embodiments does not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0048] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A durability test bench with continuously adjustable amplitude, Features: include: A workbench (100), wherein a socket (110) is provided on the workbench (100); A frame (200), the end of which is fixedly connected to the outer wall of the workbench (100), and the frame (200) comprises a support frame (210); An adjustable eccentric wheel assembly (300) comprises a driven wheel (310), a fixing frame (320), an adjusting rod (330), a screw rod (340), a sliding block (350) and a connecting shaft (360); the driven wheel (310) is rotatably connected to the supporting frame (210); the fixing frame (320) is arranged on a side of the driven wheel (310) away from the supporting frame (210); and the fixing frame (320) is provided with a flange that is in contact with an outer wall of the driven wheel (310). The outer wall of the adjusting rod (330) is rotatably connected to the inner wall of the through hole (321), the end of the screw rod (340) is fixedly connected to the end of the adjusting rod (330) facing the central axis of the driven wheel (310), the slider (350) is provided with a screw hole (351), the outer wall of the screw rod (340) is screwed to the inner wall of the screw hole (351), and the connecting shaft (360) is arranged on the side of the slider (350) away from the driven wheel (310); A connecting plate (400), an end of which is rotatably connected to the connecting shaft (360); A push rod (500), the push rod (500) being plugged into the insertion hole (110), and the end of the push rod (500) facing the driven wheel (310) being rotatably connected to the end of the connecting plate (400) away from the connecting shaft (360); A power mechanism (800), the power mechanism (800) comprising a rotating shaft (810), a driven pulley (820), a variable frequency motor (830), a driving pulley (840) and a belt (850); the rotating shaft (810) is rotatably connected to a support frame (210), one end of the rotating shaft (810) is fixedly connected to the middle part of the outer wall of the driven pulley (310), the other end of the rotating shaft (810) is fixedly connected to the middle part of the outer wall of the driven pulley (820), the variable frequency motor (830) is arranged on a frame (200), the driving pulley (840) is arranged at the output end of the variable frequency motor (830), and the belt (850) connects the driven pulley (820) and the driving pulley (840); A limit block (352) is provided on the side of the slider (350) facing the driven wheel (310), a limit groove (311) is provided on the outer wall of the driven wheel (310), and the outer wall of the limit block (352) is slidably connected to the inner wall of the limit groove (311); An outer wall of the driven wheel (310) facing the slider (350) is provided with a mark (370), and an outer wall of the slider (350) is provided with a pointer (380), with the tip of the pointer (380) facing the mark (370); The outer wall of the driven wheel (310) is provided with a reinforcing limit plate (390), and the end of the screw rod (340) away from the adjusting rod (330) is in contact with the outer wall of the reinforcing limit plate (390); The end of the push rod (500) facing the connecting plate (400) is fixedly connected with a slot plate (600), the end of the slot plate (600) away from the push rod (500) is rotatably connected to the end of the connecting plate (400) away from the connecting shaft (360), and the end of the push rod (500) away from the slot plate (600) is provided with a sample clamp (700).

2. The durability test bench according to claim 1, Features: A linear bearing (900) is provided on the inner wall of the insertion hole (110), and the inner wall of the linear bearing (900) is slidably connected to the outer wall of the push rod (500).

3. The durability test bench according to claim 1, Features: The frame (200) further comprises: A bottom plate (220), the support frame (210) being arranged on the bottom plate (220); A plurality of support rods (230), one end of each support rod (230) being fixedly connected to the outer wall of the workbench (100), and the other end of each support rod (230) being fixedly connected to the outer wall of the bottom plate (220).

4. The durability test bench according to claim 3, Features: Also includes: A plurality of adjustable feet (240), wherein the adjustable feet (240) are arranged on the outer side of the bottom plate (220).

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