Fixing device and testing device for testing mechanical life of low-voltage apparatus
By designing a fixing device for low-voltage electrical appliances, the problem that large-size low-voltage electrical appliances cannot be fixed in mechanical life tests is solved, and the stable fixation and accurate test results of low-voltage electrical appliances are achieved.
Patent Information
- Application Number
- CN202422095992.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-28
AI Technical Summary
Large-size low-voltage electrical appliances cannot be fixed during mechanical life tests, resulting in jumping and falling during the test process, affecting the accuracy of the test results.
A fixing device is designed, including a fixing plate, an adjustment component and a fixing component. Through the design of the fixing plate and an adjustment component, a stable fixing of the low-voltage electrical appliance is achieved, and the fixing torque is adjusted through the adjustment component to adapt to different sizes and torque requirements.
It effectively solves the problem of low-voltage electrical appliances taking off and falling during tests, improves the accuracy of mechanical life test results, and is suitable for low-voltage electrical appliances of different sizes and specifications.
Smart Images
Figure CN222958457U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-voltage electrical appliances, and specifically, to a fixing device and a test device for testing the mechanical life of low-voltage electrical appliances. Background Art
[0002] The mechanical life of a low-voltage electrical appliance refers to the number of no-load operations it can withstand without repair or replacement of mechanical parts, which mainly depends on the firmness of the mechanical structure of the electrical appliance and the mechanical strength of its components, and is an important technical indicator for measuring the life of the electrical appliance.
[0003] In the prior art, for low-voltage electrical appliances with conventional sizes, they are hung on the rails of the test device for testing. However, for large-size low-voltage electrical appliances, due to their large own weight, they cannot be hung on the rails of the test device and generally are placed flat on the horizontal rails and cannot be fixed. Since the mechanical life of some low-voltage electrical appliances is up to more than 1 million times, the impact force caused by the breaking of the low-voltage electrical appliance once will cause the low-voltage electrical appliance itself to jump up and fall under the action of gravity, which is inconsistent with the actual working state of the low-voltage electrical appliance. The actual working state of the low-voltage electrical appliance is generally a fixed state and will not jump up and fall. The situation of jumping up and falling during the test process will impact the connecting parts of the low-voltage electrical appliance itself, easily causing related parts such as the connecting bolts and screws of the electrical appliance housing to be affected by the impact load and then fatigue failure, resulting in inaccurate results of the mechanical life test of the low-voltage electrical appliance. Summary of the Utility Model
[0004] To solve at least one aspect of the above problems, the present utility model provides a fixing device for testing the mechanical life of low-voltage electrical appliances, including a fixing plate, two groups of adjusting components and at least two groups of fixing components; the length of the fixing plate is greater than the length of the bottom plate of the low-voltage electrical appliance to be tested, and the width of the fixing plate matches the width of the bottom plate of the low-voltage electrical appliance to be tested; long strip-shaped fixing holes penetrating the fixing plate along the vertical direction are provided at both ends of the fixing plate in the length direction; the two groups of adjusting components are respectively arranged at both ends of the fixing plate in the length direction; the adjusting component includes two bottom blocks and a top block; the two bottom blocks are respectively fixedly connected to both sides of the fixing hole on the top surface of the fixing plate, the top surface of the bottom block is an inclined surface that gradually rises or gradually descends along the extending direction of the fixing hole, and the top surfaces of the two bottom blocks are in the same inclined surface; the top surface of the top block is a horizontal surface, the bottom surface of the top block is an inclined surface, and the inclination direction and inclination angle of the bottom surface of the top block are the same as the inclination direction and inclination angle of the top surface of the bottom block, and the bottom surface of the top block is simultaneously in contact with the top surfaces of the two bottom blocks; an adjusting hole penetrating the top block along the vertical direction is provided on the top block, and the adjusting hole corresponds to the fixing hole; the two groups of fixing components are respectively arranged at both ends of the fixing plate in the length direction; the fixing component includes a first fixing piece and a second fixing piece; the first fixing piece includes a head and a rod portion, the head matches the inner cavity of the track on the base of the test device, and the head is located below the fixing plate; the bottom end of the rod portion is fixedly connected to the top surface of the head, the diameter of the rod portion matches the width of the opening of the track, and the rod portion simultaneously penetrates the fixing hole and the adjusting hole; the second fixing piece is detachably connected to the rod portion and is in contact with the top surface of the top block.
[0005] Through the above technical solution, bottom blocks with inclined top surfaces and a top block with an inclined bottom surface that match each other are designed at both ends of the fixing plate. When a low-voltage electrical appliance needs to test its mechanical life, the low-voltage electrical appliance is placed on the base, the fixing plate is placed on the bottom plate of the low-voltage electrical appliance, the head of the first fixing piece is located in the inner cavity of the track of the test device, and the rod portion sequentially penetrates upward through the opening of the track, the fixing hole and the adjusting hole and is connected to the second fixing piece, then the fixation of the low-voltage electrical appliance can be achieved; in addition, by adjusting the position of the top block, the total height of the bottom block and the top block can be adjusted, thereby adjusting the connection length of the rod portion of the first fixing piece in the fixing device of the present application, and realizing the adjustment of the fixing torque of the low-voltage electrical appliance, which helps to adapt to rod portions of different lengths and different torque requirements. The fixing device of the present application solves the problem that the low-voltage electrical appliance cannot be fixed, avoids the situation of jumping and falling during the test process, and helps to improve the accuracy of the mechanical life test results of the low-voltage electrical appliance.
[0006] Preferably, stepped teeth are provided on the top surface of the bottom block and the bottom surface of the top block. The stepped teeth with the same number of steps on the two bottom blocks are at the same height, and the stepped teeth on the top surface of the bottom block match the stepped teeth on the bottom surface of the top block, which helps to improve the connection stability between the bottom block and the top block.
[0007] Preferably, the extending direction of the fixing hole is the same as the length direction of the fixing plate. Through the above technical solution, it is possible to adapt to the tests of low-voltage electrical appliances of different sizes or specifications, and it is possible to make the two fixing components located in the same track, so that it can also be used on a test device with only one track.
[0008] Preferably, the top surfaces of the bottom blocks in the two adjusting components are inclined downward from top to bottom in a direction away from or close to each other, which facilitates adjusting the total heights of the bottom blocks and the top blocks in the two adjusting components to be the same.
[0009] Preferably, one end of the fixing hole close to the end face of the fixing plate penetrates through the end face of the fixing plate.
[0010] Preferably, the adjusting hole is a long strip hole extending along the extending direction of the fixing hole, and the width of the adjusting hole matches the size of the cross section of the rod portion, so as to realize the adjustment by moving the top block without moving the bolt.
[0011] Preferably, one end of the adjusting hole penetrates through the end face of the top block close to it.
[0012] Preferably, the first fixing member is a bolt and the second fixing member is a nut; the head of the bolt matches the inner cavity of the track on the base of the test device, and the rod portion of the bolt sequentially penetrates through the fixing hole and the adjusting hole from below the fixing plate; the size of the outer peripheral surface of the bottom end of the nut is larger than the size of the adjusting hole, the nut is threadedly connected with the bolt, and the bottom surface of the nut abuts against the top surface of the top block.
[0013] Preferably, the nut is a flange nut.
[0014] The present application also provides a test device for testing the mechanical life of low-voltage electrical appliances, including a base and the above-mentioned fixing device for testing the mechanical life of low-voltage electrical appliances; a plurality of mutually parallel tracks are provided on the top surface of the base; the fixing plate is arranged on the top surface of the base, the head of the first fixing member is located in the track, the rod portion of the first fixing member penetrates through the opening of the track, and the first fixing member is slidably connected with the track along the extending direction of the track.
[0015] The fixing device and the test device for testing the mechanical life of low-voltage electrical appliances of the present utility model have the following beneficial effects:
[0016] By designing a fixing plate with dimensions larger than the bottom plate of the low-voltage electrical appliance and elongated fixing holes thereon, and designing a bottom block with a slanted top surface and a top block with a slanted bottom surface that match on the fixing plate. When a low-voltage electrical appliance needs to be tested for mechanical life, the low-voltage electrical appliance is placed on the base, the fixing plate is placed on the bottom plate of the low-voltage electrical appliance, the head of the bolt is located inside the track cavity of the test device, and the rod portion of the bolt sequentially passes upward through the opening of the track, the fixing hole, and the adjusting hole and is connected to the flange nut. That is, the bottom plate of the low-voltage electrical appliance is clamped between the base and the fixing plate, and the fixation of the low-voltage electrical appliance can be achieved. Additionally, by adjusting the position of the top block, the total height of the bottom block and the top block can be adjusted, thereby adjusting the connection length of the bolt rod portion in the fixing device of the present application and achieving the adjustment of the fixing torque of the low-voltage electrical appliance, which helps to adapt to bolts of different lengths and different torque requirements. By designing the direction of the long hole to be the same as the length direction of the fixing plate, it can be adapted to the testing of low-voltage electrical appliances of different sizes or specifications, and the bottom surface of the top block in the two sets of adjusting components is designed to be inclined downward in a direction away from or close to each other, facilitating the adjustment of the total height of the bottom block and the top block in the two sets of adjusting components to be the same. The fixing device and the test device of the present application have simple structures and convenient operations, solve the problem of the inability to fix the low-voltage electrical appliance, avoid the situation of jumping up and falling during the test, and help to improve the accuracy of the mechanical life test results of the low-voltage electrical appliance. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to better understand the above and other objects, features, advantages, and functions of the present utility model, reference may be made to the embodiments shown in the drawings. The same reference numerals in the drawings refer to the same components. Those skilled in the art should understand that the drawings are intended to schematically illustrate the preferred embodiments of the present utility model and have no restrictive effect on the scope of the present utility model, and the components in the drawings are not drawn to scale.
[0018] Figure 1 FIG. shows a schematic structural diagram of a test device for testing the mechanical life of a low-voltage electrical appliance according to an embodiment of the present utility model;
[0019] Figure 2 FIG. shows an exploded view of a test device for testing the mechanical life of a low-voltage electrical appliance according to an embodiment of the present utility model;
[0020] Figure 3 FIG. shows a sectional view of a test device for testing the mechanical life of a low-voltage electrical appliance according to an embodiment of the present utility model.
[0021] DESCRIPTION OF REFERENCE NUMERALS:
[0022] 1, fixing plate; 11, fixing hole; 2, bolt; 3, nut; 4, bottom block; 5, top block; 51, adjusting hole; 6, base; 61, track; 7, low-voltage electrical appliance to be tested; 71, bottom plate. Detailed Implementation Modes
[0023] The following describes exemplary embodiments of the present disclosure with reference to the accompanying drawings. Various details of the embodiments of the present disclosure are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, descriptions of well-known functions and structures are omitted below for clarity and conciseness.
[0024] As used herein, the term "including" and its variations mean open inclusion, that is, "including but not limited to". Unless otherwise specified, the term "or" means "and / or". The term "based on" means "at least partially based on". The term "an exemplary embodiment" and "an embodiment" mean "at least one exemplary embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. There may also be other explicit and implicit definitions below.
[0025] To at least partially solve one or more of the above problems and other potential problems, embodiments of the present disclosure propose a fixing device for testing the mechanical life of low-voltage electrical appliances, including a fixing plate 1, two sets of adjusting components, and at least two sets of fixing components; the length of the fixing plate 1 is greater than the length of the bottom plate 71 of the low-voltage electrical appliance 7 to be tested, and the width of the fixing plate 1 matches the width of the bottom plate 71 of the low-voltage electrical appliance 7 to be tested; fixing holes 11 penetrating the fixing plate 1 along the vertical direction are provided at both ends of the fixing plate 1 in the length direction, and the fixing holes 11 are elongated holes extending along the length direction of the fixing plate 1; the two sets of adjusting components are respectively arranged at both ends of the fixing plate 1 in the length direction; the adjusting component includes two bottom blocks 4 and a top block 5; the two bottom blocks 4 are respectively fixedly connected to both sides of the fixing hole 11 on the top surface of the fixing plate 1, the top surface of the bottom block 4 is an inclined surface gradually rising or gradually falling along the extension direction of the fixing hole 11, and the top surfaces of the two bottom blocks 4 are in the same inclined plane; the top surface of the top block 5 is a horizontal plane, the bottom surface of the top block 5 is an inclined surface, and the inclination direction and inclination angle of the bottom surface of the top block 5 are the same as the inclination direction and inclination angle of the top surface of the bottom block 4, and the bottom surface of the top block 5 is in contact with the top surfaces of the two bottom blocks 4 at the same time; an adjusting hole 51 penetrating the top block 5 along the vertical direction is provided on the top block 5, and the adjusting hole 51 corresponds to the fixing hole 11; the two sets of fixing components are respectively arranged at both ends of the fixing plate 1 in the length direction; the fixing component includes a first fixing piece and a second fixing piece; the first fixing piece includes a head and a rod part, the head matches the inner cavity of the track 61 on the base 6 of the test device, and the head is located below the fixing plate 1; the bottom end of the rod part is fixedly connected to the top surface of the head, the diameter of the rod part matches the width of the opening part of the track 61, and the rod part penetrates through the fixing hole 11 and the adjusting hole 51 at the same time; the second fixing piece is detachably connected to the rod part and abuts against the top surface of the top block 5.
[0026] Specifically, as Figures 1 to 3 shown, the fixing plate 1 is a rectangular flat plate, the length of the fixing plate 1 is greater than the length of the bottom plate 71 of the low-voltage electrical appliance 7 to be tested, and the width of the fixing plate 1 matches the width of the bottom plate 71 of the low-voltage electrical appliance 7 to be tested, that is, the width of the fixing plate 1 is greater than or equal to or less than the width of the bottom plate 71 of the low-voltage electrical appliance 7 to be tested; long-strip fixing holes 11 penetrating the fixing plate 1 along the vertical direction are provided at both ends of the fixing plate 1 in the length direction, and the extension direction of the fixing holes 11 can be selected to be the same as the length direction or the width direction of the fixing plate 1. Preferably, the extension direction of the fixing holes 11 is the same as the length direction of the fixing plate 1. More preferably, the fixing holes 11 are U-shaped, and one end of the fixing holes 11 close to the end face of the fixing plate 1 penetrates through the end face of the fixing plate 1.
[0027] Two sets of adjusting components are respectively arranged at both ends of the fixing plate 1 in the length direction. The adjusting component includes two bottom blocks 4 and a top block 5, and both the bottom block 4 and the top block 5 are wedge-shaped blocks. The two bottom blocks 4 are respectively fixedly connected to both sides of the fixing hole 11 on the top surface of the fixing plate 1. Preferably, the bottom block 4 is integrally formed with the fixing plate 1. The top surface of the bottom block 4 is an inclined surface that gradually rises or gradually descends along the extending direction of the fixing hole 11, and the top surfaces of the two bottom blocks 4 are in the same inclined plane. In some embodiments, the extending direction of the fixing hole 11 is the same as the width direction of the fixing plate 1, and the inclination directions of the top surfaces of the bottom blocks 4 in the two sets of adjusting components are preferably the same. In a preferred embodiment, the extending direction of the fixing hole 11 is the same as the length direction of the fixing plate 1, and the top surfaces of the bottom blocks 4 in the two sets of adjusting components are inclined downward from top to bottom in a direction away from or close to each other, as Figure 1 shown.
[0028] The top block 5 is arranged directly above the bottom block 4. The top surface of the top block 5 is a horizontal plane, and the bottom surface of the top block 5 is an inclined surface. The inclination direction and inclination angle of the bottom surface of the top block 5 are the same as those of the top surface of the bottom block 4. The bottom surface of the top block 5 is simultaneously in contact with the top surfaces of the two bottom blocks 4. Preferably, stepped teeth are provided on the top surface of the bottom block 4 and the bottom surface of the top block 5. The stepped teeth at the same stepped tooth number on the two bottom blocks 4 are at the same height, and the stepped teeth on the top surface of the bottom block 4 match the stepped teeth on the bottom surface of the top block 5.
[0029] An adjusting hole 51 that penetrates the top block 5 in the vertical direction is provided on the top block 5. Preferably, the adjusting hole 51 is a long hole extending along the extending direction of the fixing hole 11. The width of the adjusting hole 51 matches the size of the cross-section of the rod portion. More preferably, the adjusting hole 51 is U-shaped. One end of the adjusting hole 51 penetrates the end surface of the top block 5 close to it, and the adjusting hole 51 corresponds to the fixing hole 11.
[0030] Two sets of fixing components are respectively arranged at both ends of the fixing plate 1 in the length direction. The fixing component includes a first fixing member and a second fixing member. The first fixing member includes a head and a rod portion. The head matches the inner cavity of the track 61 on the base 6 of the test device, and the head is located below the fixing plate 1. The bottom end of the rod portion is fixedly connected to the top surface of the head. The diameter of the rod portion matches the width of the opening of the track 61. The rod portion simultaneously penetrates the fixing hole 11 and the adjusting hole 51. The second fixing member is detachably connected to the rod portion and abuts against the top surface of the top block 5. Among them, the detachable connection method can be selected as snap connection or plug connection or threaded connection. Specifically, as Figure 1As shown, the first fixing member is a bolt 2, and the second fixing member is a nut 3; the bolt 2 is preferably a T-shaped bolt 2. The head of the bolt 2 is matched with the inner cavity of the track 61 on the base 6 of the test device. The rod portion of the bolt 2 sequentially penetrates through the fixing hole 11 and the adjusting hole 51 from below the fixing plate 1; the outer peripheral dimension of the bottom end of the nut 3 is larger than the dimension of the adjusting hole 51. Preferably, the nut 3 is a flange nut 3. The nut 3 is threadedly connected to the bolt 2, and the bottom surface of the nut 3 abuts against the top surface of the top block 5.
[0031] The present application also provides a test device for testing the mechanical life of low-voltage electrical appliances, such as Figures 1 to 3 As shown, it includes a base 6 and a fixing device for testing the mechanical life of low-voltage electrical appliances according to any one of the above; a plurality of mutually parallel tracks 61 are provided on the top surface of the base 6; the fixing plate 1 is arranged on the top surface of the base 6. The head of the first fixing member is located in the track 61, and the rod portion of the first fixing member penetrates through the opening of the track 61. The first fixing member is slidably connected to the track 61 along the extending direction of the track 61.
[0032] The various embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the present text.
Claims
1. A fixture for testing the mechanical life of low-voltage electrical appliances, characterized in that: It comprises a fixing plate (1), two groups of adjusting components and at least two groups of fixing components; The length of the fixing plate (1) is greater than the length of the bottom plate (71) of the low-voltage electrical appliance (7) to be tested, and the width of the fixing plate (1) matches the width of the bottom plate (71) of the low-voltage electrical appliance (7) to be tested; Long strip-shaped fixing holes (11) are provided at both ends of the fixing plate (1) in the length direction and penetrate the fixing plate (1) in the vertical direction; The two groups of adjustment components are respectively arranged at the two ends of the fixed plate (1) in the length direction; the adjustment components include two bottom blocks (4) and a top block (5); the two bottom blocks (4) are respectively fixedly connected to the two sides of the fixing hole (11) on the top surface of the fixing plate (1); the top surface of the bottom block (4) is an inclined surface which gradually tilts upward or gradually tilts downward along the extension direction of the fixing hole (11), and the top surfaces of the two bottom blocks (4) are located in the same inclined surface; the top surface of the top block (5) is a horizontal surface, the bottom surface of the top block (5) is an inclined surface, and the inclination direction and inclination angle of the bottom surface of the top block (5) are the same as the inclination direction and inclination angle of the top surface of the bottom block (4), and the bottom surface of the top block (5) abuts against the top surfaces of the two bottom blocks (4) at the same time; the top block (5) is provided with an adjustment hole (51) which penetrates the top block (5) in the vertical direction, and the adjustment hole (51) corresponds to the fixing hole (11); Two groups of fixing components are respectively arranged at both ends of the fixing plate (1) in the length direction; the fixing components include a first fixing member and a second fixing member; the first fixing member includes a head and a rod, the head matches the inner cavity of the track (61) on the base (6) of the test device, and the head is located below the fixing plate (1); the bottom end of the rod is fixedly connected to the top surface of the head, the diameter of the rod matches the width of the opening of the track (61), and the rod simultaneously passes through the fixing hole (11) and the adjustment hole (51); the second fixing member is detachably connected to the rod, and abuts against the top surface of the top block (5).
2. A fixture for testing the mechanical life of low-voltage electrical appliances according to claim 1, characterized in that: The top surface of the bottom block (4) and the bottom surface of the top block (5) are both provided with stepped teeth, the stepped teeth with the same number of stepped teeth on the two bottom blocks (4) are located at the same height, and the stepped teeth on the top surface of the bottom block (4) match the stepped teeth on the bottom surface of the top block (5).
3. A fixture for testing the mechanical life of a low-voltage electrical appliance according to claim 1, characterized in that: The extending direction of the fixing hole (11) is the same as the length direction of the fixing plate (1).
4. A fixture for testing the mechanical life of low-voltage electrical appliances according to claim 3, characterized in that: The top surfaces of the bottom blocks (4) in the two groups of adjusting components are inclined from top to bottom in a direction away from each other or towards each other.
5. A fixture for testing the mechanical life of low-voltage electrical appliances according to claim 3, characterized in that: One end of the fixing hole (11) close to the end surface of the fixing plate (1) penetrates the end surface of the fixing plate (1).
6. A fixture for testing the mechanical life of low-voltage electrical appliances according to claim 1, characterized in that: The adjustment hole (51) is a long hole extending along the extension direction of the fixing hole (11), and the width of the adjustment hole (51) matches the size of the cross section of the rod.
7. A fixture for testing the mechanical life of a low-voltage electrical appliance according to claim 6, characterized in that: One end of the adjustment hole (51) passes through the end surface of the top block (5) adjacent to it.
8. A fixture for testing the mechanical life of low-voltage electrical appliances according to claim 1, characterized in that: The first fixing member is a bolt (2), and the second fixing member is a nut (3); the head of the bolt (2) matches the inner cavity of a track (61) on a base (6) of the test device, and the rod of the bolt (2) passes through the fixing hole (11) and the adjustment hole (51) in sequence from the bottom of the fixing plate (1); the size of the outer peripheral surface of the bottom end of the nut (3) is larger than the size of the adjustment hole (51), the nut (3) is threadedly connected to the bolt (2), and the bottom surface of the nut (3) abuts against the top surface of the top block (5).
9. A fixture for testing the mechanical life of a low-voltage electrical appliance according to claim 8, characterized in that: The nut (3) is a flange nut (3).
10. A test device for testing the mechanical life of low-voltage electrical appliances, characterized in that: The invention comprises a base (6) and a fixing device for testing the mechanical life of a low-voltage electrical appliance as described in any one of claims 1 to 9; a plurality of mutually parallel tracks (61) are provided on the top surface of the base (6); a fixing plate (1) is arranged on the top surface of the base (6), a head of a first fixing member is located in the track (61), a rod of the first fixing member passes through an opening of the track (61), and the first fixing member is slidably connected to the track (61) along the extension direction of the track (61).