Damping device for explosion-proof frequency converter

Abstract

The utility model discloses a shock absorber for anti -explosion frequency converter, including base, the top surface fixed connection casing of base, the frequency converter heat dissipation aluminium base is connected in the casing and slides, the bottom surface symmetry of frequency converter heat dissipation aluminium base is connected with two roof boards, the bottom surface of two roof boards is connected with a U -shaped board respectively and slides, the bottom wall of U -shaped board is connected in the casing, the fixed connection fixed part is in the casing, and the fixed part is connected with two U -shaped boards fixedly, and the symmetry screw connection two first buffer of roof board and U -shaped board is connected, and the second buffer is established between two first buffer, and the second buffer is connected between roof board and U -shaped board with screw. The utility model first buffer and second buffer all adopt modularization screw connection design, when internal spring or damping rod because long -time use ageing, failure, do not need to replace whole shock absorber or large -scale parts, can independently, fastly carry out disassembly and replacement. This greatly reduced the maintenance cost and time cost of later period.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and in particular to a shock absorber for explosion-proof frequency converters. Background Technology

[0002] A frequency converter is a power control device that uses frequency conversion technology and microelectronics to control an AC motor by changing the frequency of the power supply. Frequency converters also have many protection functions, such as overcurrent, overvoltage, and overload protection. With the continuous improvement of industrial automation, frequency converters have been widely used.

[0003] Patent publication number CN218603348U discloses a housing for an explosion-proof high-voltage frequency converter, including a base. An explosion-proof shell is fixedly installed on the top of the base, and a fireproof mechanism is fixedly installed inside the explosion-proof shell. A heat dissipation mechanism is located on the inner side of the explosion-proof shell at the top of the base. By setting a buffer mechanism, the housing can buffer and dampen the frequency converter's heat dissipation aluminum base during use through a first shock absorber. During shock absorption, due to the extension and retraction of the first shock absorber, the bottom of the frequency converter's heat dissipation aluminum base abuts against the inclined surface of a guide block, causing the guide block to press against a second shock absorber. The extension and rebound of the second shock absorber further buffers the signal. Compared to existing technologies, this technology offers better heat dissipation, buffering, and fire protection capabilities, is more practical, has broader application prospects, and is worthy of widespread adoption.

[0004] However, the spring in the buffer mechanism of this patent is a fixed structure. After long-term use, the spring will age and lose its elasticity. Since the spring is fixed to the guide block, it cannot be disassembled and replaced separately. The entire buffer needs to be replaced, which is costly. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a shock absorber for explosion-proof frequency converters.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a shock absorber for an explosion-proof frequency converter, comprising a base, a housing fixedly connected to the top surface of the base, a frequency converter heat sink aluminum seat slidably connected inside the housing, two top plates symmetrically snapped onto the bottom surface of the frequency converter heat sink aluminum seat, a U-shaped plate slidably connected to the bottom surface of each of the two top plates, the U-shaped plate snapping onto the bottom wall of the housing, a fixing member fixedly connected inside the housing, the fixing member being fixedly connected to the two U-shaped plates, two first buffer members symmetrically threaded between the top plates and the U-shaped plates, a second buffer member being provided between the two first buffer members, the second buffer member being threadedly connected between the top plates and the U-shaped plates.

[0007] As a further description of the above technical solution: the fixing component includes a fixing block fixedly connected to the bottom wall of the housing, a support plate fixedly connected to the front side of the fixing block by bolts, two U-shaped plates symmetrically fixed to both ends of the support plate, a countersunk hole penetrating the front side of the support plate, a third threaded groove opened on the front side of the fixing block, the bolt sleeved in the countersunk hole and threadedly connected in the third threaded groove.

[0008] As a further description of the above technical solution: the first buffer includes a first trapezoidal block vertically fixed to the bottom surface of the top plate, the inclined surface of the first trapezoidal block is attached to a second trapezoidal block, the second trapezoidal block is slidably connected to the bottom wall of the U-shaped plate, the side of the second trapezoidal block is threadedly connected to a first damping rod, the end of the first damping rod is slidably connected to a support block, the support block is fixedly connected to the bottom wall of the U-shaped plate, and a first spring is sleeved on the outer edge of the first damping rod.

[0009] As a further description of the above technical solution: a first threaded groove is horizontally opened on the vertical surface of the second trapezoidal block, a first threaded block is threadedly connected in the first threaded groove, the first threaded block is coaxially fixed to one end of the first damping rod, the side of the support block passes through the first mounting hole, a first screw is slidably inserted in the first mounting hole, the first screw is coaxially fixed to the other end of the first damping rod, a first nut is threaded on the outer edge of the first screw, and the first nut abuts against the side of the support block.

[0010] As a further description of the above technical solution: a sliding groove is horizontally opened on the bottom wall of the U-shaped plate, a slider is slidably connected in the sliding groove, the slider is fixedly connected to the bottom surface of the second trapezoidal block, and a plurality of first positioning grooves are opened on the inner side of the support block, which are equidistantly distributed along the circumference. A first positioning block is inserted into the first positioning groove, and the first positioning block is fixedly connected to the end of the first damping rod.

[0011] As a further description of the above technical solution: the second buffer includes a second spring abutting between the top plate and the U-shaped plate, a second damping rod is sleeved inside the second spring, a second threaded block is fixedly connected to the top surface of the second damping rod, a second threaded groove is opened on the top surface of the top plate, the second threaded block is threadedly connected in the second threaded groove, a groove is opened on the bottom surface of the U-shaped plate, the top wall of the groove passes through a second mounting hole, a second screw is slidably inserted in the second mounting hole, the second screw is fixedly connected to the bottom surface of the second damping rod, a second nut is threadedly sleeved on the outer edge of the second screw, the second nut abuts against the top wall of the groove, a plurality of second positioning grooves are opened on the top surface of the U-shaped plate equidistantly distributed along the circumference, a second positioning block is inserted into the second positioning groove, and the second positioning block is fixedly connected to the bottom surface of the second damping rod.

[0012] As a further description of the above technical solution: two blind holes are symmetrically opened on the bottom wall of the housing, and a support column is slidably connected in the blind holes. The support column is fixed to the bottom surface of the inverter heat sink aluminum base. Two slots are symmetrically opened on the inner wall of the blind holes, and a locking block is slidably connected in the slots. The locking block is fixedly connected to the support column. A first limiting groove is opened on the bottom surface of the inverter heat sink aluminum base, and a first limiting block is slidably connected in the first limiting groove. The first limiting block is fixed to the top surface of the top plate. A second limiting groove is opened on the bottom wall of the housing, and two second limiting blocks are slidably connected in the second limiting groove. The second limiting blocks are symmetrically fixed to the bottom surface of the U-shaped plate.

[0013] This utility model has the following beneficial effects:

[0014] 1. Compared with existing technologies, the shock absorber for this explosion-proof frequency converter adopts a modular threaded connection design for both the first and second buffer components. When the internal springs or damping rods age and fail due to prolonged use, there is no need to replace the entire shock absorber or large components; they can be disassembled and replaced independently and quickly. This greatly reduces subsequent maintenance costs and time costs.

[0015] 2. Compared with existing technologies, the shock absorber for this explosion-proof frequency converter uses a precise sliding fit and circumferential positioning between its components through limit grooves, positioning grooves and positioning blocks. This ensures that the components will not be misaligned, rotated or loosened under frequent vibration and impact, thus guaranteeing the long-term stability and reliability of the shock absorption system. The U-shaped plate is firmly installed on the housing base through fasteners, resulting in a strong overall structural rigidity. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the overall structure of a shock absorber for an explosion-proof frequency converter proposed in this utility model;

[0017] Figure 2 This utility model proposes a shock absorber for an explosion-proof frequency converter. Figure 1 Enlarged view of the structure at point A in the middle;

[0018] Figure 3 This utility model proposes a shock absorber for an explosion-proof frequency converter. Figure 1 Enlarged view of the structure at point B;

[0019] Figure 4 This is a side sectional view of the connection between the top plate and the U-shaped plate of a shock absorber for an explosion-proof frequency converter proposed in this utility model;

[0020] Figure 5 This utility model proposes a shock absorber for an explosion-proof frequency converter. Figure 4 Enlarged view of the structure at point C;

[0021] Figure 6 This utility model proposes a shock absorber for an explosion-proof frequency converter. Figure 4 Enlarged view of the structure at point D.

[0022] Legend:

[0023] 1. Base; 2. Inverter heat sink aluminum base; 3. Housing; 4. First limiting groove; 5. First limiting block; 6. U-shaped plate; 7. Second limiting groove; 8. Second limiting block; 9. Top plate; 10. Support plate; 11. Countersunk hole; 12. Bolt; 13. Fixing block; 14. Support column; 15. First trapezoidal block; 16. Support block; 17. First screw; 18. First nut; 19. First mounting hole; 20. First spring; 21. 21. First damping rod; 22. Slide groove; 23. Slider; 24. Second trapezoidal block; 25. Groove; 26. Second screw; 27. Second nut; 28. Second spring; 29. ​​Second damping rod; 30. Second threaded groove; 31. Second threaded block; 32. First threaded groove; 33. First threaded block; 34. First positioning groove; 35. First positioning block; 36. Second positioning groove; 37. Second positioning block; 38. Second mounting hole. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1 to 6This utility model provides a shock absorber for an explosion-proof frequency converter: It includes a base 1, a housing 3 fixedly connected to the top surface of the base 1, a frequency converter heat sink aluminum base 2 slidably connected inside the housing 3, two top plates 9 symmetrically snapped onto the bottom surfaces of the frequency converter heat sink aluminum base 2, and a U-shaped plate 6 slidably connected to the bottom surfaces of each of the two top plates 9. The U-shaped plates 6 are snapped onto the bottom wall of the housing 3. A fixing member is fixedly connected inside the housing 3, and the fixing member is fixedly connected to the two U-shaped plates 6. Two first buffer members are symmetrically threaded between the top plates 9 and the U-shaped plates 6. A second buffer member is provided between the two first buffer members, and the second buffer member is threadedly connected to the top plates 9 and the U-shaped plates 6. Between the plates 6, two blind holes are symmetrically opened on the bottom wall of the housing 3. A support column 14 is slidably connected in the blind holes. The support column 14 is fixed on the bottom surface of the inverter heat sink aluminum base 2. Two slots are symmetrically opened on the inner wall of the blind holes. A locking block is slidably connected in the slots. The locking block is fixedly connected to the support column 14. A first limiting groove 4 is opened on the bottom surface of the inverter heat sink aluminum base 2. A first limiting block 5 is slidably connected in the first limiting groove 4. The first limiting block 5 is fixed on the top surface of the top plate 9. A second limiting groove 7 is opened on the bottom wall of the housing 3. Two second limiting blocks 8 are slidably connected in the second limiting groove 7. The second limiting blocks 8 are symmetrically fixed on the bottom surface of the U-shaped plate 6.

[0026] The fastener includes a fixing block 13 fixedly connected to the bottom wall of the housing 3. A support plate 10 is fixedly connected to the front side of the fixing block 13 by bolts 12. Two U-shaped plates 6 are symmetrically fixed at both ends of the support plate 10. The front side of the support plate 10 passes through the countersunk hole 11. A third threaded groove is opened on the front side of the fixing block 13. The bolts 12 are sleeved in the countersunk hole 11 and threaded in the third threaded groove.

[0027] The first buffer component includes a first trapezoidal block 15 vertically fixed to the bottom surface of the top plate 9. The inclined surface of the first trapezoidal block 15 is in contact with a second trapezoidal block 24. The second trapezoidal block 24 is slidably connected to the bottom wall of the U-shaped plate 6. The side of the second trapezoidal block 24 is threadedly connected to a first damping rod 21. The end of the first damping rod 21 is slidably connected to a support block 16. The support block 16 is fixedly connected to the bottom wall of the U-shaped plate 6. A first spring 20 is sleeved on the outer edge of the first damping rod 21. A first threaded groove 32 is horizontally formed on the vertical surface of the second trapezoidal block 24. A first threaded block 33 is threadedly connected to the first threaded groove 32. The first threaded block 33 is coaxially fixed to one end of the first damping rod 21. The side of the support block 16 passes through the first mounting hole 19. The first screw 17 slides through the first mounting hole 19. The first screw 17 is coaxially fixed to the other end of the first damping rod 21. The outer edge of the first screw 17 is threaded with a first nut 18. The first nut 18 abuts against the side of the support block 16. The bottom wall of the U-shaped plate 6 is horizontally opened with a sliding groove 22. The sliding block 23 is slidably connected in the sliding groove 22. The sliding block 23 is fixedly connected to the bottom surface of the second trapezoidal block 24. The inner side of the support block 16 is opened with a plurality of first positioning grooves 34 equidistantly distributed along the circumference. The first positioning block 35 is inserted into the first positioning groove 34. The first positioning block 35 is fixedly connected to the end of the first damping rod 21.

[0028] The second buffer includes a second spring 28 abutting between the top plate 9 and the U-shaped plate 6. A second damping rod 29 is sleeved inside the second spring 28. A second threaded block 31 is fixedly connected to the top surface of the second damping rod 29. A second threaded groove 30 is opened on the top surface of the top plate 9. The second threaded block 31 is threadedly connected to the second threaded groove 30. A groove 25 is opened on the bottom surface of the U-shaped plate 6. The top wall of the groove 25 passes through the second mounting hole 38. A second screw 26 slides through the second mounting hole 38. The second screw 26 is fixedly connected to the bottom surface of the second damping rod 29. A second nut 27 is threadedly sleeved on the outer edge of the second screw 26. The second nut 27 abuts against the top wall of the groove 25. A plurality of second positioning grooves 36 are equally spaced and distributed circumferentially on the top surface of the U-shaped plate 6. A second positioning block 37 is inserted into the second positioning groove 36. The second positioning block 37 is fixedly connected to the bottom surface of the second damping rod 29.

[0029] Working principle: When a spring or damping rod is damaged and needs to be replaced, first rotate bolt 12 to remove it from the fixing block 13 and support plate 10. Then, remove the two U-shaped plates 6 and two top plates 9 from the housing 3 and inverter heat sink aluminum base 2 via the support plate 10. Next, remove the second nut 27. Then, remove the top plate 9 together with the second damping rod 29 from the U-shaped plate 6. The second spring 28 can then be disassembled and replaced. If the second damping rod 29 needs to be disassembled, simply rotate the second damping rod 29. The second damping rod 29 will drive the second threaded block 31 to rotate, causing the second damping rod 29 to separate from the top plate 9. When disassembling the spring and damping rod on the first buffer component, remove the first nut 18, and then push the second trapezoidal block 24 toward the center of the U-shaped plate 6, so that the second trapezoidal block 24 drives the first damping rod 21 to move, so that the first screw 17 leaves the first mounting hole 19 of the support block 16, and then remove the trapezoidal block, the first damping rod 21 and the first spring 20 from the U-shaped plate 6, and then the first spring 20 can be disassembled. Then rotate the first damping rod 21, and the first damping rod 21 drives the first threaded block 33 to rotate, so that the first damping rod 21 separates from the second trapezoidal block 24, thereby completing the disassembly of the first damping rod 21.

[0030] During assembly, firstly, the first damping rod 21 is connected to the second trapezoidal block 24 using the first threaded block 33. Then, the first spring 20 is sleeved on the outer edge of the first damping rod 21. Next, the second trapezoidal block 24 is installed onto the U-shaped plate 6 via the slider 23, so that the slider 23 is installed in the groove 22. Then, the second trapezoidal block 24 is moved so that the first screw 17 passes through the first mounting hole 19 on the support block 16, and at the same time, the first positioning block 35 at the end of the first damping rod 21 is inserted into the first positioning groove 34 on the inner side of the support block 16. Then, the first nut 18 is rotated to fix the first buffer. Then, the second damping rod 29 is connected to the top plate 9 via the second threaded block 31. The second spring 28 is sleeved on the outer edge of the second damping rod 29. Then, the second screw 26 at the end of the second damping rod 29 is passed through the second mounting hole 38, and the second positioning block 37 on its bottom surface is inserted into the second positioning groove 36. Then, the second buffer is fixed by the second nut 27. At the same time, the inclined surfaces of the first trapezoidal block 15 and the second trapezoidal block 24 are in contact with each other. Then, the second limiting block 8 on the bottom surface of the U-shaped plate 6 is installed into the second limiting groove 7 on the bottom wall of the housing 3. The first limiting block 5 on the top surface of the top plate 9 is installed into the first limiting groove 4 on the bottom surface of the inverter heat dissipation aluminum base 2. Then, the support plate 10 and the fixing block 13 are fixed by the bolt 12, thereby fixing the U-shaped plate 6 and the top plate 9 in the housing 3.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present 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 the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shock absorber for an explosion-proof frequency converter, comprising a base (1), wherein a housing (3) is fixedly connected to the top surface of the base (1), characterized in that: The inverter heat sink aluminum base (2) is slidably connected inside the housing (3). Two top plates (9) are symmetrically snapped onto the bottom surface of the inverter heat sink aluminum base (2). A U-shaped plate (6) is slidably connected to the bottom surface of each of the two top plates (9). The U-shaped plate (6) is snapped onto the bottom wall of the housing (3). A fixing member is fixedly connected inside the housing (3). The fixing member is fixedly connected to the two U-shaped plates (6). Two first buffer members are symmetrically threaded between the top plate (9) and the U-shaped plate (6). A second buffer member is provided between the two first buffer members. The second buffer member is threadedly connected between the top plate (9) and the U-shaped plate (6).

2. The shock absorber for an explosion-proof frequency converter according to claim 1, characterized in that: The fastener includes a fixing block (13) fixedly connected to the bottom wall of the housing (3). A support plate (10) is fixedly connected to the front side of the fixing block (13) by bolts (12). Two U-shaped plates (6) are symmetrically fixed at both ends of the support plate (10). The front side of the support plate (10) has a countersunk hole (11). A third threaded groove is opened on the front side of the fixing block (13). The bolts (12) are sleeved in the countersunk hole (11) and threadedly connected in the third threaded groove.

3. The shock absorber for an explosion-proof frequency converter according to claim 1, characterized in that: The first buffer includes a first trapezoidal block (15) vertically fixed to the bottom surface of the top plate (9), the inclined surface of the first trapezoidal block (15) is attached to a second trapezoidal block (24), the second trapezoidal block (24) is slidably connected to the bottom wall of the U-shaped plate (6), the side of the second trapezoidal block (24) is threadedly connected to a first damping rod (21), the end of the first damping rod (21) is slidably connected to a support block (16), the support block (16) is fixedly connected to the bottom wall of the U-shaped plate (6), and a first spring (20) is sleeved on the outer edge of the first damping rod (21).

4. A shock absorber for an explosion-proof frequency converter according to claim 3, characterized in that: The vertical surface of the second trapezoidal block (24) is horizontally provided with a first threaded groove (32), and the first threaded block (33) is threadedly connected in the first threaded groove (32). The first threaded block (33) is coaxially fixed with one end of the first damping rod (21). The side of the support block (16) passes through the first mounting hole (19). The first screw (17) is slidably inserted in the first mounting hole (19). The first screw (17) is coaxially fixed to the other end of the first damping rod (21). The outer edge of the first screw (17) is threaded with a first nut (18), and the first nut (18) abuts against the side of the support block (16).

5. A shock absorber for an explosion-proof frequency converter according to claim 4, characterized in that: The bottom wall of the U-shaped plate (6) has a horizontally opened groove (22), and a slider (23) is slidably connected in the groove (22). The slider (23) is fixedly connected to the bottom surface of the second trapezoidal block (24). The inner side of the support block (16) has multiple equidistant first positioning grooves (34) distributed circumferentially. A first positioning block (35) is inserted into the first positioning groove (34), and the first positioning block (35) is fixedly connected to the end of the first damping rod (21).

6. A shock absorber for an explosion-proof frequency converter according to claim 1, characterized in that: The second buffer includes a second spring (28) abutting between the top plate (9) and the U-shaped plate (6). A second damping rod (29) is sleeved inside the second spring (28). A second threaded block (31) is fixedly connected to the top surface of the second damping rod (29). A second threaded groove (30) is opened on the top surface of the top plate (9). The second threaded block (31) is threadedly connected in the second threaded groove (30). A groove (25) is opened on the bottom surface of the U-shaped plate (6). The top wall of the groove (25) penetrates the second mounting hole (38). A second screw (26) is slidably inserted into the second mounting hole (38). The second screw (26) is fixedly connected to the bottom surface of the second damping rod (29). A second nut (27) is threaded onto the outer edge of the second screw (26). The second nut (27) abuts against the top wall of the groove (25). A plurality of second positioning grooves (36) are equidistantly distributed along the circumference on the top surface of the U-shaped plate (6). A second positioning block (37) is inserted into the second positioning groove (36). The second positioning block (37) is fixedly connected to the bottom surface of the second damping rod (29).

7. A shock absorber for an explosion-proof frequency converter according to claim 1, characterized in that: Two blind holes are symmetrically opened on the bottom wall of the housing (3). A support column (14) is slidably connected in the blind hole. The support column (14) is fixed to the bottom surface of the inverter heat sink aluminum base (2). Two slots are symmetrically opened on the inner wall of the blind hole. A card block is slidably connected in the slot. The card block is fixedly connected to the support column (14). A first limiting groove (4) is opened on the bottom surface of the inverter heat sink aluminum base (2). A first limiting block (5) is slidably connected in the first limiting groove (4). The first limiting block (5) is fixed to the top surface of the top plate (9). A second limiting groove (7) is opened on the bottom wall of the housing (3). Two second limiting blocks (8) are slidably connected in the second limiting groove (7). The second limiting blocks (8) are symmetrically fixed to the bottom surface of the U-shaped plate (6).

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