Mechanical static load test device for high-low voltage electric appliance shell structure

Abstract

The utility model discloses a high and low voltage electric appliance housing structure mechanical static load test device comprising a bottom plate, the center of the bottom plate is provided with a rotating platform structure, the bottom plate is provided with first slide rails on the left and right sides of the rotating platform structure, and the two slide rails are slidably provided with side support structures. Two third lead screws are rotationally installed on the bottom plate through bearing seats, nuts are arranged on the two lead screws and fixed to the two side supporting structures respectively, two second reduction gearboxes are installed on the bottom plate, the output ends of the two reduction gearboxes are connected with the two third lead screws respectively, second motors are installed on the two reduction gearboxes, and the two third lead screws are connected with the second motors respectively. The output shaft of the second motor is connected with the input end of the second reduction gearbox; according to the device, the side supporting structure, the upper supporting structure and the force application structure are arranged to be matched, static load force can be applied to the left side, the right side and the upper portion of a high-low voltage electric appliance shell test object, the applied force value is monitored in real time, and accurate force application to the test object is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment enclosure testing technology, specifically a mechanical static load testing device for the enclosure structure of high and low voltage electrical appliances. Background Technology

[0002] High and low voltage complete sets of electrical equipment, as the core carriers of modern power systems, play a crucial role in power generation, transmission, transformation, and terminal distribution. Their performance directly affects power grid security and energy utilization efficiency. As an important physical protection structure, the enclosure of electrical equipment must simultaneously ensure the stable operation of internal electrical components and the safety of operators. According to standards such as IEC61439 and GB / T 7251, the equipment enclosure must pass mechanical stress endurance tests to verify its structural integrity against static loads, torques, and other external forces during transportation, installation, and operation. Traditional mechanical stress endurance testing devices typically use simulated loading methods such as weights and sandbags, which suffer from low accuracy, high labor intensity for test personnel, low efficiency, and poor repeatability.

[0003] Therefore, we have designed a mechanical static load testing device for the casing structure of high and low voltage electrical appliances to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a mechanical static load testing device for the casing structure of high and low voltage electrical appliances, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanical static load testing device for the casing structure of high and low voltage electrical appliances, comprising a base plate, a rotating platform structure installed in the center of the base plate, first slide rails installed on the base plate and on both sides of the rotating platform structure, side support structures slidably installed on both slide rails, two third lead screws rotatably installed on the base plate via bearing seats, each lead screw having a nut, and the two nuts being fixed to the two side support structures respectively, two second reduction gearboxes installed on the base plate, the output ends of the two reduction gearboxes being connected to the two third lead screws respectively, a second motor installed on each of the two reduction gearboxes, the output shaft of the second motor being connected to the input end of the second reduction gearbox, a gantry-type bracket installed above the base plate, the base plate being fixed to the gantry-type bracket, an upper support structure that can slide up and down installed on the gantry-type bracket, a pair of lead screw jacks installed on the top beam of the gantry-type bracket, the output lead screws of which are fixed to the top of the upper support structure, and force-applying structures installed on both the upper support structure and the side support structure.

[0006] As a preferred technical solution of this utility model, the rotating platform structure includes a servo motor and multiple omnidirectional balls mounted on a base plate. A circular base is mounted on the output shaft of the servo motor. The multiple omnidirectional balls are arranged in a circular array around the output shaft of the servo motor, and all the omnidirectional balls are supported on the bottom of the base. A placement platform is fixed on the base. A first lead screw is rotatably mounted on the placement platform through a bearing seat. Two nuts are provided on the first lead screw. A groove and a strip-shaped through hole are opened on the placement platform. Two sets of sliders are provided inside the groove. Two U-shaped frames are provided on the placement platform. The two sets of sliders inside the groove are respectively fixed to the bottom of the two U-shaped frames. The two nuts on the first lead screw pass through the strip-shaped through hole on the placement platform and are respectively fixed to the bottom of the two U-shaped frames. Two quick clamps are installed on each U-shaped frame, and a clamping plate is fixed between the output rods of the two quick clamps.

[0007] As a preferred embodiment of this utility model, the side support structure includes a vertical bracket slidably mounted on a first slide rail, a nut on a third lead screw fixed to the bottom of the vertical bracket, a vertically arranged second slide rail mounted on the vertical bracket, a first slide table slidably mounted on the slide rail, a force-applying structure mounted on the slide table, a vertically arranged second lead screw rotatably mounted on the vertical bracket, a nut on the second lead screw and fixed to the first slide table, a first reduction gearbox mounted on the vertical bracket, the output end of the reduction gearbox connected to the second lead screw, a first motor mounted on the reduction gearbox, and the output shaft of the first motor connected to the input end of the first reduction gearbox.

[0008] As a preferred embodiment of this utility model, the upper support structure includes a horizontal support that is slidably mounted on a gantry-type bracket. The bottom end of the output screw of the screw jack is fixed to the top of the horizontal support. A third horizontally arranged slide rail is installed at the bottom of the horizontal support. A second slide table is slidably mounted on the slide rail. A force-applying structure is installed on the slide table. A fourth horizontally arranged screw is rotatably mounted on the horizontal support. A screw nut is provided on the fourth screw and is fixed to the second slide table. A third reduction gearbox is installed on the horizontal support. The output end of the reduction gearbox is connected to the fourth screw. A third motor is installed on the reduction gearbox, and the output shaft of the third motor is connected to the input end of the third reduction gearbox.

[0009] As a preferred embodiment of this utility model, the force-applying structure includes an electric cylinder, on which a force sensor is mounted, and a pressure plate is mounted on the force sensor via a universal hinge.

[0010] As a preferred technical solution of this utility model, a control console is provided next to the base plate, and the rotating platform structure, side support structure, second motor, upper support structure, screw jack and force application structure are all connected and controlled by the control console.

[0011] As a preferred technical solution of this utility model, the threads on the left and right halves of the first lead screw have opposite directions of rotation, the two nuts on the first lead screw respectively engage with the two types of threads on the lead screw, and handwheels are installed at both ends of the first lead screw.

[0012] As a preferred embodiment of this utility model, the two clamping plates on the rotating platform structure are arranged opposite to each other.

[0013] As a preferred embodiment of this utility model, the force-applying structures on the first slides of the two side support structures are arranged opposite to each other.

[0014] As a preferred embodiment of this utility model, the force-applying structure on the second slide of the upper support structure is arranged vertically downwards.

[0015] Compared with the prior art, this utility model provides a mechanical static load testing device for the casing structure of high and low voltage electrical appliances, which has the following beneficial effects:

[0016] 1. This mechanical static load testing device for high and low voltage electrical appliance casing structures, through the combination of side support structure, upper support structure and force application structure, can apply static load to the left and right sides and top of the high and low voltage electrical appliance casing test specimens, and monitor the applied force value in real time, so as to achieve precise force application to the test specimens, which helps to more accurately evaluate the mechanical stress resistance of the test specimens and provide a reliable basis for product optimization. Compared with traditional simulated loading tests, it has higher accuracy and efficiency, and does not require experimental personnel to carry back and forth weights, sandbags and other simulation tools.

[0017] 2. This mechanical static load testing device for the casing structure of high and low voltage electrical appliances, by setting a rotating platform structure on the base plate, can control the rotation and position adjustment of the test specimen, so as to enable the test specimen to undergo static load testing at different angles. It can more comprehensively evaluate the mechanical stress tolerance of the test specimen in different positions and improve the accuracy and reliability of the test. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the bottom of the rotating platform structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the top of the rotating platform structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the side support structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the upper support structure of this utility model;

[0023] Figure 6This is a schematic diagram of the force-applying structure of this utility model.

[0024] Reference numerals: 1. Base plate; 2. Rotating platform structure; 201. Servo motor; 202. Base; 203. Universal ball joint; 204. Placement platform; 205. First lead screw; 206. Slide groove; 207. U-shaped frame; 208. Quick clamp; 209. Clamping plate; 3. First slide rail; 4. Side support structure; 401. Vertical bracket; 402. Second slide rail; 403. First slide table; 404. Second lead screw; 405. First gearbox; 406. First... 5. Motor; 6. Third lead screw; 7. Second gearbox; 8. Second motor; 9. Gantry bracket; 10. Upper support structure; 11. Horizontal bracket; 12. Third slide rail; 13. Second slide table; 14. Fourth lead screw; 15. Third gearbox; 16. Third motor; 17. Screw jack; 18. Force application structure; 19. Electric cylinder; 10. Force sensor; 11. Universal hinge; 12. Pressure plate; 13. Control console. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figures 1-6 This mechanical static load testing device for high and low voltage electrical appliance casing structures mainly consists of a base plate 1, a rotating platform structure 2, side support structures 4, an upper support structure 9, a force-applying structure 11, and a control console 12. The rotating platform structure 2 is installed in the center of the base plate 1, and its function is to place the high and low voltage electrical appliance casing samples and to rotate and adjust the position of the samples during the test. A set of first slide rails 3 is installed on the base plate 1 on both the left and right sides of the rotating platform structure 2. Two side support structures 4 are slidably installed on the corresponding first slide rails 3. Two third lead screws 5 are rotatably mounted on the plate 1 via bearing seats. Each third lead screw 5 is equipped with a lead screw nut, and these two leads screw nuts are respectively fixed to the bottom of the two side support structures 4. Two second reduction gearboxes 6 are also installed on the base plate 1. The output ends of these two reduction gearboxes are respectively connected to the two third lead screws 5. A second motor 7 is installed on each reduction gearbox. The output shaft of the second motor 7 is connected to the input end of the second reduction gearbox 6. The second motor 7 drives the second reduction gearbox 6, thereby driving the third lead screws 5 to rotate, so as to realize the horizontal movement of the side support structure 4 on the first slide rail 3.

[0027] A gantry-type support 8 is installed above the base plate 1, and the base plate 1 is fixed to the gantry-type support 8. An upper support structure 9 that can slide up and down is installed on the gantry-type support 8. A pair of screw jacks 10 are installed on the top beam of the gantry-type support 8, and their output screws are fixed to the top of the upper support structure 9. The upper support structure 9 can be driven to move up and down on the gantry-type support 8 through the screw jacks 10. Force-applying structures 11 are installed on both the upper support structure 9 and the side support structure 4 to apply static load to the sample.

[0028] The rotating platform structure 2 includes a servo motor 201 and multiple omnidirectional balls 203 mounted on a base plate 1. A circular base 202 is mounted on the output shaft of the servo motor 201. The multiple omnidirectional balls 203 are arranged in a ring array around the output shaft of the servo motor 201 and are all supported on the bottom of the base 202, serving to support the base 202. A placement platform 204 is fixed on the base 202. A first lead screw 205 is rotatably mounted on the placement platform 204 through a bearing seat. The left and right halves of the first lead screw 205 have opposite thread directions and are provided with two nuts. The placement platform 204 has a sliding groove 206 and a strip-shaped through hole. Two sets of sliders are provided inside the sliding groove 206. Two U-shaped brackets 207 are provided on the placement platform 204. The blocks are fixed to the bottom of the two U-shaped frames 207 respectively. The two nuts on the first lead screw 205 pass through the strip-shaped through holes on the placement platform 204 and are fixed to the bottom of the two U-shaped frames 207 respectively. Handwheels are installed at both ends of the first lead screw 205. Two quick clamps 208 are installed on each U-shaped frame 207, and a clamping plate 209 is fixed between the output rods of the two quick clamps 208. The two clamping plates 209 are arranged opposite each other. The clamping plates 209 can be controlled to clamp the sample by the quick clamps 208. By rotating the handwheel, the first lead screw 205 is rotated, so that the two nuts drive the two U-shaped frames 207 to move towards or away from each other along the slide groove 206. The distance between the two U-shaped frames 207 can be adjusted, so as to adapt to the clamping of samples of different sizes.

[0029] The side support structure 4 includes a vertical bracket 401 slidably mounted on a first slide rail 3. A nut on a third lead screw 5 is fixed to the bottom of the vertical bracket 401. A vertically arranged second slide rail 402 is mounted on the vertical bracket 401. A first slide table 403 is slidably mounted on the slide rail. A force-applying structure 11 is mounted on the first slide table 403. A vertically arranged second lead screw 404 is rotatably mounted on the vertical bracket 401. A nut is provided on the second lead screw 404 and is fixed to the first slide table 403. A first reduction gearbox 405 is mounted on the vertical bracket 401. The output end of the gearbox is connected to the second lead screw 404. The gearbox is equipped with a first motor 406. The output shaft of the first motor 406 is connected to the input end of the first gearbox 405. The first motor 406 drives the first gearbox 405, which in turn drives the second lead screw 404 to rotate, thereby realizing the up and down movement of the first slide table 403 on the second slide rail 402. This adjusts the height of the force-applying structure 11 on the first slide table 403. The force-applying structures 11 on the first slide table 403 of the two side support structures 4 are arranged opposite to each other so as to apply static load to the sample from both sides.

[0030] The upper support structure 9 includes a horizontal support 901 slidably mounted on the gantry frame 8. The bottom end of the output screw of the screw jack 10 is fixed to the top of the horizontal support 901. A horizontally arranged third slide rail 902 is installed at the bottom of the horizontal support 901. A second slide table 903 is slidably mounted on the slide rail. A force-applying structure 11 is installed on the second slide table 903. A horizontally arranged fourth screw 904 is rotatably mounted on the horizontal support 901. A screw nut is provided on the fourth screw 904 and is fixed to the second slide table 903. A third reduction gearbox 905 is installed on the horizontal support 901. The output end of the gearbox is connected to the fourth lead screw 904. The gearbox is equipped with a third motor 906. The output shaft of the third motor 906 is connected to the input end of the third gearbox 905. The third motor 906 drives the third gearbox 905, which in turn drives the fourth lead screw 904 to rotate, thereby realizing the left and right horizontal movement of the second slide table 903 on the third slide rail 902. This adjusts the left and right horizontal position of the force-applying structure 11 on the second slide table 903. The force-applying structure 11 on the second slide table 903 of the upper support structure 9 is set vertically downwards to apply static load to the sample from above.

[0031] The force-applying structure 11 includes an electric cylinder 1101, on which a force sensor 1102 is mounted. A pressure plate 1104 is mounted on the force sensor 1102 via a universal hinge 1103. The electric cylinder 1101 is used to drive the pressure plate 1104 to apply a static load to the sample. The force sensor 1102 is used to monitor the applied force value in real time and transmit the data to the control console 12. The universal hinge 1103 allows the pressure plate 1104 to adapt to irregular sample shells.

[0032] A control console 12 is located next to the base plate 1. The rotating platform structure 2, the side support structure 4, the second motor 7, the upper support structure 9, the screw jack 10, and the force application structure 11 are all connected and controlled by the control console 12.

[0033] Example 2: Based on Example 1, this example optimizes some components. All lead screws in this device are trapezoidal lead screws. The trapezoidal lead screw and the lead nut have a certain self-locking capability. The lead nut moves only by the rotation of the lead screw and will not move due to other external forces. All motors in this device are servo motors connected to the control console 12. The control console 12 can precisely control the speed and number of revolutions of the servo motor output shaft, thereby precisely controlling the moving speed and position of each force-applying structure 11. The lead screw jack 10 is an electric lead screw jack connected to the control console 12. The extension and retraction of its output lead screw are controlled by the servo motor. The force sensor 1102 is a high sampling rate dynamic force sensor. In practical applications, the electric cylinder 1101 and the force sensor 1102 can cooperate to build a closed-loop feedback system to achieve precise force control on the sample.

[0034] Operating Procedure: Place the high and low voltage electrical appliance casing sample on the placement platform 204 of the rotating platform structure 2. Manually rotate the handwheel at the end of the first lead screw 205 to adjust the two U-shaped frames 207 to a suitable distance. Then, use the quick clamps 208 and clamping plates 209 on the U-shaped frames 207 to clamp and fix the sample. Start the lead screw jack 10 through the control console 12 to adjust the horizontal support 901 of the upper support structure 9 to a suitable height. Then, start the first motor 406, the second motor 7, and the third motor 906 through the control console 12 to adjust the three force-applying structures 11 to a suitable position, so that they are roughly aligned with the left and right sides and the top of the sample. After the preparation is completed, start the electric cylinder 1101 in the force-applying structure 11 through the control console 12. The output rod of the electric cylinder 1101 pushes the force sensor 1102 and the universal hinge 1103. The pressure plate 1104 applies a static load to the test specimen. The force sensor 1102 monitors the applied force value in real time and transmits the data to the control console 12. The control console 12 precisely controls the electric cylinder 1101 according to the preset test parameters to achieve precise force application to the test specimen. When other sides of the test specimen need to be tested, the output rods of the three electric cylinders 1101 are first reset by the control console 12. Then, the servo motor 201 is started by the control console 12. The output shaft of the servo motor 201 drives the base 202 to rotate 90°, thereby driving the test specimen on the placement platform 204 to rotate 90°. Then, the three electric cylinders 1101 are controlled by the control console 12 to apply force to the test specimen. After the test is completed, the electric cylinders 1101 are reset and stopped by the control console 12. Then, the quick clamp 208 is released and the test specimen is removed from the placement platform 204.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanical static load testing device for the casing structure of high and low voltage electrical appliances, comprising a base plate (1), characterized in that: A rotating platform structure (2) is installed in the center of the base plate (1). First slide rails (3) are installed on the base plate (1) and on both sides of the rotating platform structure (2). Side support structures (4) are slidably installed on both slide rails. Two third lead screws (5) are rotatably installed on the base plate (1) via bearing seats. Each of these lead screws has a nut, and the two nuts are fixed to the two side support structures (4) respectively. Two second reduction gearboxes (6) are installed on the base plate (1). The output ends of these two reduction gearboxes are respectively connected to the two third lead screws (5). A second motor (7) is installed on each of the two gearboxes. The output shaft of the second motor (7) is connected to the input end of the second gearbox (6). A gantry bracket (8) is set above the base plate (1). The base plate (1) is fixed to the gantry bracket (8). An upper support structure (9) that can slide up and down is installed on the gantry bracket (8). A pair of screw jacks (10) are installed on the top beam of the gantry bracket (8). The output screw is fixed to the top of the upper support structure (9). A force-applying structure (11) is installed on both the upper support structure (9) and the side support structure (4).

2. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 1, characterized in that: The rotating platform structure (2) includes a servo motor (201) and multiple omnidirectional balls (203) mounted on a base plate (1). A circular base (202) is mounted on the output shaft of the servo motor (201). The multiple omnidirectional balls (203) are arranged in a ring array around the output shaft of the servo motor (201), and all the omnidirectional balls (203) are supported on the bottom of the base (202). A placement platform (204) is fixed on the base (202). A first lead screw (205) is rotatably mounted on the placement platform (204) through a bearing seat. Two lead screw nuts are provided on the first lead screw (205). 4) The slide groove (206) and the strip-shaped through hole are opened on the top. Two sets of sliders are set inside the slide groove (206). Two U-shaped frames (207) are set on the placement platform (204). The two sets of sliders inside the slide groove (206) are fixed to the bottom of the two U-shaped frames (207). The two nuts on the first lead screw (205) pass through the strip-shaped through hole on the placement platform (204) and are fixed to the bottom of the two U-shaped frames (207). Two quick clamps (208) are installed on each U-shaped frame (207), and a clamping plate (209) is fixed between the output rods of the two quick clamps (208).

3. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 1, characterized in that: The side support structure (4) includes a vertical bracket (401) slidably mounted on a first slide rail (3), a nut on a third lead screw (5) fixed to the bottom of the vertical bracket (401), a vertically mounted second slide rail (402) mounted on the vertical bracket (401), a first slide table (403) slidably mounted on the slide rail, a force-applying structure (11) mounted on the slide table, a vertically mounted second lead screw (404) rotatably mounted on the vertical bracket (401), a nut on the second lead screw (404) and fixed to the first slide table (403), a first reduction gearbox (405) mounted on the vertical bracket (401), the output end of the reduction gearbox connected to the second lead screw (404), a first motor (406) mounted on the reduction gearbox, and the output shaft of the first motor (406) connected to the input end of the first reduction gearbox (405).

4. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 1, characterized in that: The upper support structure (9) includes a horizontal support (901) slidably mounted on a gantry frame (8), the bottom end of the output screw of the screw jack (10) is fixed to the top of the horizontal support (901), a horizontally arranged third slide rail (902) is installed at the bottom of the horizontal support (901), a second slide table (903) is slidably mounted on the slide rail, a force-applying structure (11) is installed on the slide table, a horizontally arranged fourth screw (904) is rotatably mounted on the horizontal support (901), a screw nut is provided on the fourth screw (904), and the screw nut is fixed to the second slide table (903), a third reduction gearbox (905) is installed on the horizontal support (901), the output end of the reduction gearbox is connected to the fourth screw (904), a third motor (906) is installed on the reduction gearbox, and the output shaft of the third motor (906) is connected to the input end of the third reduction gearbox (905).

5. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 1, characterized in that: The force-applying structure (11) includes an electric cylinder (1101), on which a force sensor (1102) is mounted, and a pressure plate (1104) is mounted on the force sensor (1102) via a universal hinge (1103).

6. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 1, characterized in that: A control console (12) is provided next to the base plate (1). The rotating platform structure (2), side support structure (4), second motor (7), upper support structure (9), screw jack (10) and force application structure (11) are all connected and controlled by the control console (12).

7. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 2, characterized in that: The threads on the left and right halves of the first lead screw (205) are rotated in opposite directions. The two nuts on the first lead screw (205) respectively engage with the two types of threads on the lead screw. Handwheels are installed at both ends of the first lead screw (205).

8. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 2, characterized in that: The two clamping plates (209) on the rotating platform structure (2) are arranged opposite to each other.

9. The mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 3, characterized in that: The force-applying structures (11) on the first slide (403) of the two side support structures (4) are arranged opposite to each other.

10. A mechanical static load testing device for the casing structure of high and low voltage electrical appliances according to claim 4, characterized in that: The force-applying structure (11) on the second slide (903) of the upper support structure (9) is set vertically downward.

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