An adjustable stiffness vibration damping mount for an electrical device

Abstract

This invention relates to the field of electrical equipment installation support and vibration isolation technology, specifically to an adjustable stiffness vibration damping bracket for electrical equipment. The bracket includes a base and a protective cover connected to the base. An equipment support plate is movably disposed within the protective cover. A support assembly and a stiffness adjustment assembly are disposed between the equipment support plate and the base. The support assembly forms a damping telescopic support and elastic arm support path through an outer rod, an inner rod, an upper plate connecting block, an elastic arm, an arc-shaped contact end, a load-sharing pressure plate, a pressing block, an arc-shaped contact groove, and a guide block. The guide block can slide within the guide groove of the arc-shaped contact end. The stiffness adjustment assembly includes a slide rail, a stiffness adjustment slide block, a roller frame, and support rollers. Compared to existing technologies, this application allows for adjustment of the vertical equivalent support stiffness after equipment installation. On-site personnel can adjust the vertical equivalent support stiffness according to the equipment weight and vibration conditions without disassembling the electrical equipment or replacing vibration damping components.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment installation support and vibration isolation technology, and in particular to an adjustable stiffness vibration damping bracket for electrical equipment. Background Technology

[0002] Electrical equipment is typically subjected to foundation vibration, fan or pump vibration, mobile platform vibration, and short-term impacts during transportation, installation, and operation. This vibration is transmitted from the bottom of the equipment to the housing, terminal blocks, circuit breakers, relays, circuit boards, and cable connections, easily causing loose fasteners, solder joint fatigue, unstable terminal contacts, internal module misalignment, or increased operating noise. Existing electrical equipment typically uses rubber pads, spring pads, bottom vibration dampers, or bracket-type flexible isolation structures for vibration reduction.

[0003] A Chinese patent has been published: a vibration reduction system for a portable power supply device, application publication number: CN111594714A. This patent discloses a technical solution of setting side vibration dampers and bottom vibration dampers between the support assembly and the portable power supply device, so as to form a flexible isolation between the power supply device and the support assembly, thereby reducing vibration and noise during the movement process.

[0004] However, the vibration damping structures described above are generally designed or assembled by selecting damping pads or dampers based on equipment weight and experience. After installation, their vertical equivalent stiffness is basically determined by the rubber hardness, spring parameters, or damper specifications. When the same type of bracket is used for electrical equipment of different weights, center of gravity heights, or operating vibration frequencies, insufficient stiffness will increase the risk of equipment shaking, cable pulling, and casing collisions. In contrast, excessive stiffness will reduce the vibration isolation effect and may even cause the internal electrical connection points to bear higher transmitted vibrations. Adjusting the stiffness by replacing rubber pads of different hardness or springs of different specifications usually requires disassembling the equipment, re-leveling, and retightening, which is inconvenient for on-site maintenance. Therefore, it is necessary to provide an electrical equipment vibration damping bracket whose stiffness can be adjusted after equipment installation. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose an adjustable stiffness vibration damping bracket for electrical equipment, so as to solve the problems of existing electrical equipment vibration damping brackets having basically fixed vertical stiffness after installation, requiring the replacement of vibration damping components to adapt to different equipment weights or different vibration conditions, simple elastic supports being prone to repeated up-and-down vibrations, and the difficulty in observing the on-site adjustment status.

[0006] To achieve the above objectives, the present invention provides an adjustable stiffness vibration damping bracket for electrical equipment, comprising a base, a protective cover connected to the base, an equipment support plate movably disposed inside the protective cover, and a support component disposed between the equipment support plate and the base, the support component having an elastic support path. The base is also provided with a stiffening adjustment component, which rolls against the elastic arm in the support component and can move along the length of the elastic arm to change the force span of the elastic arm. The upper surface of the equipment support plate is provided with a main damping damping pad, and the top of the base is provided with a downward limiting damping pad near the bottom of the elastic arm. The main damping damping pad is used to provide continuous damping energy dissipation between the electrical equipment and the equipment support plate, and the downward limiting damping pad is used to provide limiting and impact energy absorption when the elastic arm bends downward beyond a preset displacement.

[0007] Preferably, the support assembly has an outer rod fixedly connected to the base, an inner rod slidably connected inside the outer rod, and an upper plate connecting block fixedly connected to the upper end of the outer wall of the outer rod, the upper plate connecting block being fixedly connected to the lower side of the equipment bearing plate.

[0008] Preferably, the main damping vibration damping pad is fixedly connected to the upper surface of the equipment support plate, and the main damping vibration damping pad is used to be located between the bottom of the electrical equipment and the equipment support plate. The main damping vibration damping pad is made of rubber, polyurethane or rubber-metal composite material.

[0009] Preferably, the support assembly further comprises a pair of elastic arms, one end of which is fixedly connected to the upper plate connecting block, and the other end of which bends and extends toward the center of the equipment support plate. The end of the elastic arm facing the equipment support plate forms an arc-shaped contact end, and a guide groove is provided at one end of the arc-shaped contact end.

[0010] Preferably, a load-equalizing pressure plate is fixedly connected to the lower side of the equipment bearing plate, and a pressing block is fixedly connected to the bottom of the load-equalizing pressure plate. An arc-shaped contact groove is formed at the lower end of the pressing block. The arc-shaped contact groove abuts against the arc-shaped contact end to increase the pressure-bearing area between the pressing block and the elastic arm. A guide block is fixedly connected to the bottom of the arc-shaped contact groove. The guide block is used to slide in the guide groove to guide and limit the elastic arm.

[0011] Preferably, the downshort-limiting damping pad is fixedly connected to the upper surface of the base, the downshort-limiting damping pad is located below the elastic arm and between the arc-shaped contact end and the stiffening assembly, and a limiting gap is formed between the upper surface of the downshort-limiting damping pad and the lower surface of the elastic arm.

[0012] Preferably, the stiffening adjustment assembly has a slide rail fixedly connected to the base, a stiffening adjustment slide block slidably connected to the slide rail, a roller frame fixedly connected to the stiffening adjustment slide block, a support roller and a pressure roller rotatably connected inside the roller frame, an elastic arm passing through between the support roller and the pressure roller, the support roller abutting against the lower side of the elastic arm, and the pressure roller abutting against the upper side of the elastic arm.

[0013] Preferably, a bidirectional adjusting screw is rotatably connected to the slide rail end seat. The bidirectional adjusting screw has two threaded sections with opposite directions of rotation. The two side adjusting slides are respectively threadedly connected to the corresponding threaded sections. One end of the bidirectional adjusting screw extends to the outside of the protective cover or the outside of the base and is fixedly connected to an adjusting knob. The adjusting knob is used to drive the bidirectional adjusting screw to rotate, so as to drive the two side adjusting slides to move towards each other or away from each other.

[0014] Preferably, an indicator plate is fixedly connected to the side wall of the adjusting slide, an indicator groove is provided on the top of the base, one end of the indicator plate extends into the indicator groove, the side wall of the indicator groove communicates with the outer wall of the base, and a transparent scale window is embedded in the indicator groove to display the position of the indicator plate.

[0015] Preferably, an edge sealing strip is fixedly connected to the outer periphery of the equipment support plate, and one end of the edge sealing strip away from the equipment support plate abuts against the inner wall of the protective cover. The protective cover is detachably connected to the base and surrounds the outside of the support component and the stiffening component.

[0016] The beneficial effects of this invention are: 1. This adjustable stiffness vibration damping bracket for electrical equipment forms a roller-clamping variable span stiffness adjustment structure through a slide rail, stiffness adjustment slide, roller frame, support roller, pressure roller, bidirectional adjustment screw, and adjustment knob. The support roller and pressure roller respectively roll and constrain the elastic arm from the lower and upper sides. The bidirectional adjustment screw can drive the two stiffness adjustment slides to move towards or away from each other, thereby changing the force span between the elastic arm in the pressure area of ​​the load-equalizing plate and the support area of ​​the support roller. Thus, on-site personnel can adjust the vertical equivalent support stiffness according to the equipment weight and vibration conditions without disassembling the electrical equipment or replacing the vibration damping components.

[0017] 2. This adjustable stiffness vibration damping bracket for electrical equipment forms a composite support structure through an outer rod, an inner rod, an upper plate connecting block, an equipment bearing plate, a main damping vibration damping pad, an elastic arm, and a load-equalizing pressure plate. This allows the vertical load on the equipment bearing plate to be simultaneously transmitted to the damping telescopic support path, the main damping vibration damping path, and the elastic arm support path. The material internal friction of the main damping vibration damping pad can continuously dissipate vibration energy during the micro-displacement of the equipment bearing plate, avoiding long-term repeated up-and-down vibration of the equipment bearing plate due to relying solely on the energy storage and rebound of the elastic arm, thus improving the dynamic stability of the electrical equipment after installation.

[0018] 3. This adjustable stiffness vibration damping bracket for electrical equipment increases the contact area between the pressing block and the elastic arm through the arc-shaped contact groove and arc-shaped contact end. The guide block slides in the guide groove and guides and limits the elastic arm, which can reduce the risk of lateral displacement, local wear and unstable contact of the elastic arm during the bending process under pressure. At the same time, the downward limiting damping pad can provide additional energy absorption and limiting protection when the elastic arm bends down with large displacement. The indicator plate, indicator groove and transparent scale window can display the current position of the stiffness adjustment component. The sealing strip can maintain the dust seal between the bracket and the protective cover when the equipment bearing plate moves up and down slightly. The bracket can balance adjustable stiffness, damping energy consumption, operational reliability and protection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention after the protective cover has been removed; Figure 3 This is a schematic diagram showing the internal structure of the present invention and the positional relationship between the supporting components and the stiffening components; Figure 4 This is a partial structural diagram of the load-bearing pressure plate, pressing block, arc-shaped contact groove, guide groove, and elastic arm of the present invention. Figure 5 This is a second partial structural diagram illustrating the fit between the arc-shaped contact end, the arc-shaped contact groove, the guide block, and the guide through groove of the present invention. Figure 6 This is a partial structural diagram of the adjusting slide, roller frame, support roller, pressure roller and bidirectional adjusting screw in the adjusting assembly of the present invention; Figure 7This is a schematic diagram showing the movement adjustment of the stiffening component and the state of the equipment bearing plate under vibration and pressure according to the present invention.

[0021] The diagram is marked as follows: 1. Base; 2. Protective cover; 3. Outer rod; 4. Inner rod; 5. Upper plate connecting block; 6. Equipment bearing plate; 7. Elastic arm; 8. Arc-shaped contact end; 9. Load-equalizing pressure plate; 10. Pressing block; 11. Arc-shaped contact groove; 12. Guide block; 13. Slide rail; 14. Adjustable slide block; 15. Roller frame; 16. Support roller; 17. Lower pressure roller; 18. Bidirectional adjusting screw; 19. Adjusting knob; 20. Indicator plate; 21. Indicator groove; 22. Transparent scale window; 23. Edge sealing strip; 24. Main damping vibration damping pad; 25. Downward limiting damping pad; 26. Guide through groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0023] like Figures 1 to 7 As shown, an adjustable stiffness vibration damping bracket for electrical equipment includes a base 1, a protective cover 2 connected to the base 1, an equipment support plate 6 movably disposed inside the protective cover 2, and a support assembly disposed between the equipment support plate 6 and the base 1. The support assembly has a damping telescopic support path and an elastic arm support path. An adjustment stiffness assembly is also disposed on the base 1. The adjustment stiffness assembly rolls against the elastic arm 7 in the support assembly and can move along the length direction of the elastic arm 7 to change the force span of the elastic arm 7. A main damping damping pad 24 is disposed on the upper surface of the equipment support plate 6, and a downward limiting damping pad 25 is disposed on the top of the base 1 near the lower part of the elastic arm 7. The main damping damping pad 24 is used to provide continuous damping energy dissipation between the electrical equipment and the equipment support plate 6, and the downward limiting damping pad 25 is used to provide limiting and impact energy absorption when the elastic arm 7 bends downward beyond a preset displacement. The base 1 is the fundamental load-bearing component of the entire vibration damping bracket. It can be made of steel plate, aluminum alloy plate, cast aluminum parts, or welded frame. The base 1 is used to fix it to the ground foundation, cabinet bottom beam, mobile equipment frame, or electrical equipment mounting bracket. The protective cover 2 is installed on the base 1 to shield the support components and stiffening components between the base 1 and the equipment bearing plate 6, reducing the entry of dust, metal shavings, or external foreign objects into the internal movement gap. The equipment bearing plate 6 is located above the base 1 and the protective cover 2 or inside the protective cover 2, and can be provided with bolts for connecting the electrical equipment base. The weight and operating vibration of the electrical equipment are first transmitted to the equipment support plate 6 via the main damping damping pad 24, and then to the support assembly via the equipment support plate 6. The main damping damping pad 24 is deformed under pressure between the electrical equipment and the equipment support plate 6 and generates internal material loss, thereby providing continuous damping energy dissipation. The downward limiting damping pad 25 provides additional energy absorption and limiting protection when the elastic arm 7 bends down significantly. Thus, this support does not simply rely on the elastic arm 7 to store energy and rebound, but forms a dynamic support structure that combines elastic support and damping energy dissipation. The support assembly has an outer rod 3 fixedly connected to the base 1, and an inner rod 4 slidably connected inside the outer rod 3. A damping bushing, sealing ring, damping grease, or viscous damping medium can be installed inside the outer rod 3. The inner rod 4 and outer rod 3 dissipate vibration energy through frictional damping or viscous damping, thereby reducing the repeated up-and-down vibration of the equipment support plate 6 after excitation. An upper plate connecting block 5 is fixedly connected to the upper outer wall of the outer rod 3, and the upper plate connecting block 5 is fixedly connected to the lower side of the equipment support plate 6. A main damping damping pad 24 is fixedly connected to the upper surface of the equipment support plate 6 and is positioned between the bottom of the electrical equipment and the equipment support plate 6. The support assembly also has a pair of elastic arms 7, one end of which is fixedly connected to the upper plate connecting block 5, and the other end of which bends and extends towards the center of the equipment support plate 6. An arc-shaped contact end 8 is formed at one end of the elastic arm 7 facing the equipment support plate 6, and a guide groove 26 is provided at one end of the arc-shaped contact end 8; a load-equalizing pressure plate 9 is fixedly connected to the lower side of the equipment support plate 6, and a pressing block 10 is fixedly connected to the bottom of the load-equalizing pressure plate 9. An arc-shaped contact groove 11 is provided at the lower end of the pressing block 10, and the arc-shaped contact groove 11 abuts against the arc-shaped contact end 8. A guide block 12 is fixedly connected to the bottom of the arc-shaped contact groove 11, and the guide block 12 is used to slide in the guide groove 26 to guide and limit the elastic arm 7; a downward limiting damping pad 25 is fixedly connected to the upper surface of the base 1, and the downward limiting damping pad 25 is located below the elastic arm 7 and between the arc-shaped contact end 8 and the stiffening assembly. A limiting gap is formed between the upper surface of the downward limiting damping pad 25 and the lower surface of the elastic arm 7. The outer rod 3 can be a hollow cylindrical part or a sleeve-type rod. Its lower end or mounting base is fixed to the base 1 by bolts, welding or press fitting. The inner rod 4 is inserted into the outer rod 3 from one end of the outer rod 3 and can slide vertically relative to the outer rod 3. The main damping vibration damping pad 24 can be made of rubber, polyurethane or rubber-metal composite material and is laid or fixed on the upper surface of the equipment bearing plate 6 to form a damping isolation layer between the bottom of the electrical equipment and the equipment bearing plate 6. When the main damping vibration damping pad 24 is compressed and deformed, its material internal friction can continuously consume vibration energy and reduce the repeated up and down shaking of the electrical equipment and the equipment bearing plate 6 after excitation. The elastic arm 7 can be made of spring steel sheet, stainless steel sheet, or composite elastic plate. Two elastic arms 7 are symmetrically arranged on the left and right. The elastic arm 7 bends and extends from the upper plate connecting block 5 towards the middle of the equipment bearing plate 6, and is used to generate elastic deformation and bear part of the vertical load when the load-equalizing pressure plate 9 is pressed down. After the arc-shaped contact groove 11 is adapted to the arc-shaped contact end 8, it can transform the local point contact or line contact between the pressing block 10 and the elastic arm 7 into a larger arc surface contact, thereby reducing local stress concentration and wear. The guide block 12 extends from the bottom of the arc-shaped contact groove 11 into the guide through groove 26. During the bending process of the elastic arm 7 under pressure, the guide block 12 moves with the pressing block 10. The guide groove 26 slides and restricts the left and right displacement of the arc-shaped contact end 8, preventing the arc-shaped contact end 8 from detaching from the arc-shaped contact groove 11; the downward limiting damping pad 25 can be made of silicone rubber, nitrile rubber, polyurethane or rubber-metal composite material. Under normal small-amplitude vibration, a limiting gap is maintained between the downward limiting damping pad 25 and the elastic arm 7. This limiting gap can be 0.5mm to 2mm. When the equipment bearing plate 6 is subjected to a large impact and moves downward, the elastic arm 7 bends downward and approaches or contacts the downward limiting damping pad 25. After being compressed, the downward limiting damping pad 25 undergoes elastic compression deformation, thereby limiting the elastic arm 7 from continuing to bend downward and absorbing part of the impact energy; The stiffening assembly has a slide rail 13 fixedly connected to a base 1. A stiffening slide block 14 is slidably connected to the slide rail 13. A roller frame 15 is fixedly connected to the stiffening slide block 14. A support roller 16 and a pressure roller 17 are rotatably connected inside the roller frame 15. An elastic arm 7 passes between the support roller 16 and the pressure roller 17. The support roller 16 abuts against the lower side of the elastic arm 7, and the pressure roller 17 abuts against the upper side of the elastic arm 7. A bidirectional adjusting screw 18 is rotatably connected to the end seat of the slide rail 13. The bidirectional adjusting screw 18 has two threaded sections with opposite directions of rotation. The two stiffening slide blocks 14 on both sides are respectively connected to the corresponding threaded sections. The screw is threaded, and one end of the bidirectional adjusting screw 18 extends to the outside of the protective cover 2 or the outside of the base 1 and is fixedly connected to the adjusting knob 19. The adjusting knob 19 is used to drive the bidirectional adjusting screw 18 to rotate, so as to drive the two adjusting slides 14 to move towards each other or away from each other. The side wall of the adjusting slide 14 is fixedly connected to the indicator plate 20. The top of the base 1 is provided with an indicator groove 21. One end of the indicator plate 20 extends into the indicator groove 21. The side wall of the indicator groove 21 is connected to the outer wall of the base 1. A transparent scale window 22 is embedded in the indicator groove 21. The transparent scale window 22 is used to display the position of the indicator plate 20. The slide rail 13 can be a linear guide rail, a dovetail guide rail, a T-shaped guide rail, or a long slot guide rail. The slide rail 13 is set along the length direction of the base 1. The adjusting slide block 14 is installed on the slide rail 13 and can reciprocate along the slide rail 13. The roller frame 15 is fixed on the adjusting slide block 14. The support roller 16 and the pressure roller 17 are rotatably installed in the roller frame 15 at intervals. The elastic arm 7 passes through the gap between the two, so that the support roller 16 provides a movable fulcrum from below the elastic arm 7, and the pressure roller 17 forms a downward pressure constraint from above the elastic arm 7. The bidirectional adjusting screw 1 8 has two threaded sections with opposite directions of rotation. The two side stiffening slides 14 are respectively engaged with the corresponding threaded sections. When the on-site personnel rotate the adjustment knob 19, the bidirectional adjustment screw 18 drives the two side stiffening slides 14 to move synchronously towards each other or synchronously away from each other. When the stiffening slides 14 drive the roller frame 15, the support roller 16 and the lower pressure roller 17 to approach the pressing area of ​​the load-equalizing pressure plate 9, the effective force span of the elastic arm 7 between the pressing area and the support roller 16 becomes shorter. The deformation of the elastic arm 7 under pressure is reduced, and the vertical equivalent support stiffness of the equipment bearing plate 6 is improved. When the adjusting slide 14 moves the support roller 16 and the lower pressure roller 17 away from the pressing area of ​​the load-equalizing pressure plate 9, the effective force-bearing span of the elastic arm 7 becomes longer, the deformation of the elastic arm 7 under pressure increases, and the vertical equivalent support stiffness of the equipment bearing plate 6 decreases. Since the support roller 16 and the lower pressure roller 17 are both rolling elements, the elastic arm 7 is not easily scraped by the adjusting slide 14 during vibration and adjustment, and the adjustment resistance and wear are relatively small. The indicator 20 moves synchronously with the adjusting slide 14, enters the indicator groove 21, and is observed externally through the transparent scale window 22. The transparent scale window 22 can have scale lines or gear markings, thereby displaying the current position of the adjusting slide 14 and allowing the adjustment state to be repeatedly set. An edge sealing strip 23 is fixedly connected around the outer periphery of the equipment support plate 6. The end of the edge sealing strip 23 away from the equipment support plate 6 abuts against the inner wall of the protective cover 2. The protective cover 2 is detachably connected to the base 1 and surrounds the outside of the support component and the stiffening component. The protective cover 2 can be installed on the base 1 by screws, clips, or positioning stops. The interior of the protective cover 2 forms a space for accommodating the support components and the stiffening components. The protective cover 2 can have side holes for the adjustment knob 19 to pass through or for the adjustment knob 19 to operate. The edge sealing strip 23 can be made of rubber strip, silicone strip, or polyurethane elastic strip. The edge sealing strip 23 is fixed to the outer periphery of the equipment support plate 6. When the equipment support plate 6 is subjected to the weight and vibration of the electrical equipment and causes slight vertical displacement, the edge sealing strip 23 moves with the equipment support plate 6 and maintains elastic contact with the inner wall of the protective cover 2, thereby reducing the entry of external dust, condensate, and metal shavings into the internal mechanism. At the same time, the elastic contact of the edge sealing strip 23 can also provide a small amount of frictional damping and lateral buffering, further improving the stability of the equipment support plate 6 during movement. The installation and operation process of this invention is as follows: In use, the base 1 is first fixed on the bottom beam of the cabinet, the mounting foundation or the equipment mounting frame, and then the electrical equipment is fixed on the equipment bearing plate 6. The weight of the electrical equipment is transmitted to the upper plate connecting block 5, the outer rod 3, the inner rod 4, the load equalizing pressure plate 9 and the elastic arm 7 through the main damping vibration damping pad 24 and the equipment bearing plate 6. When the external foundation vibration or the equipment operation vibration is transmitted to the base 1, the equipment bearing plate 6 produces a vertical micro-displacement relative to the base 1, the main damping vibration damping pad 24 produces compression deformation and material internal loss, the load equalizing pressure plate 9 applies load to the arc-shaped contact end 8 through the pressing block 10 and the arc-shaped contact groove 11, and the elastic arm 7 forms a movable fulcrum at the position of the supporting roller 16 and undergoes bending deformation. When increased stiffness is required, rotating the adjustment knob 19 causes the bidirectional adjustment screw 18 to drive the stiffness adjustment slides 14 on both sides, which in turn move the roller frame 15, support roller 16, and lower pressure roller 17 closer to the pressing area of ​​the load-equalizing pressure plate 9. This shortens the effective force-bearing span of the elastic arm 7 and increases the overall support stiffness of the device. When enhanced vibration isolation flexibility is required, rotating the adjustment knob 19 in the opposite direction moves the stiffness adjustment slides 14 away from the pressing area of ​​the load-equalizing pressure plate 9. This increases the effective force-bearing span of the elastic arm 7 and reduces the overall support stiffness of the device. When the equipment is subjected to a large impact, the elastic arm 7 bends downward and contacts the downward limiting damping pad 25. The downward limiting damping pad 25 absorbs the impact and limits the elastic arm 7 from bending further downward, thereby reducing the risk of secondary rebound and hard collision. During the adjustment process, the indicator slab 20 moves with the stiffness adjustment slide 14 in the indicator groove 21. The operator can read the position through the transparent scale window 22, allowing the stiffness position of the same equipment after adjustment to be recorded and reproduced.

[0024] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0025] Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An adjustable stiffness vibration damping bracket for electrical equipment, characterized in that, Includes a base (1), on which a protective cover (2) is connected, and a device support plate (6) is movably disposed inside the protective cover (2). A support component is disposed between the device support plate (6) and the base (1), and the support component has an elastic support path. The base (1) is also provided with a stiffening adjustment component. The stiffening adjustment component rolls against the elastic arm (7) in the support component and can move along the length direction of the elastic arm (7) to change the force span of the elastic arm (7). The upper surface of the equipment bearing plate (6) is provided with a main damping damping pad (24). The top of the base (1) is provided with a downward limiting damping pad (25) near the bottom of the elastic arm (7).

2. The adjustable stiffness vibration damping bracket for electrical equipment according to claim 1, characterized in that, The support assembly has an outer rod (3) fixedly connected to the base (1), an inner rod (4) slidably connected inside the outer rod (3), an upper plate connecting block (5) fixedly connected to the upper outer wall of the outer rod (3), and the upper plate connecting block (5) fixedly connected to the lower side of the equipment bearing plate (6).

3. The adjustable stiffness vibration damping bracket for electrical equipment according to claim 1, characterized in that, The main damping vibration damping pad (24) is fixedly connected to the upper surface of the equipment support plate (6). The main damping vibration damping pad (24) is located between the bottom of the electrical equipment and the equipment support plate (6). The main damping vibration damping pad (24) is made of rubber, polyurethane or rubber-metal composite material. The main damping vibration damping pad (24) is used to provide continuous damping energy dissipation between the electrical equipment and the equipment support plate (6).

4. The adjustable stiffness vibration damping bracket for electrical equipment according to claim 2, characterized in that, The support assembly also has a pair of elastic arms (7), one end of which is fixedly connected to the upper plate connecting block (5), and the other end of which bends and extends toward the middle of the equipment support plate (6). An arc-shaped contact end (8) is formed at one end of the elastic arm (7) facing the equipment support plate (6), and a guide groove (26) is provided at one end of the arc-shaped contact end (8).

5. The adjustable stiffness vibration damping bracket for electrical equipment according to claim 4, characterized in that, A load-equalizing pressure plate (9) is fixedly connected to the lower side of the equipment bearing plate (6). A pressing block (10) is fixedly connected to the bottom of the load-equalizing pressure plate (9). An arc-shaped contact groove (11) is provided at the lower end of the pressing block (10). The arc-shaped contact groove (11) abuts against the arc-shaped contact end (8) to increase the pressure-bearing area between the pressing block (10) and the elastic arm (7). A guide block (12) is fixedly connected to the bottom of the arc-shaped contact groove (11). The guide block (12) is used to slide in the guide through groove (26) to guide and limit the elastic arm (7).

6. The adjustable stiffness vibration damping bracket for electrical equipment according to claim 4, characterized in that, The downward limiting damping pad (25) is fixedly connected to the upper surface of the base (1). The downward limiting damping pad (25) is located below the elastic arm (7) and between the arc-shaped contact end (8) and the stiffening assembly. A limiting gap is formed between the upper surface of the downward limiting damping pad (25) and the lower surface of the elastic arm (7). The downward limiting damping pad (25) is used to provide limiting and impact energy absorption when the elastic arm (7) bends downward beyond a preset displacement.

7. The adjustable stiffness vibration damping bracket for electrical equipment according to claim 4, characterized in that, The stiffening assembly has a slide rail (13) fixedly connected to the base (1), a stiffening slide (14) slidably connected to the slide rail (13), a roller frame (15) fixedly connected to the stiffening slide (14), a support roller (16) and a pressure roller (17) rotatably connected inside the roller frame (15), an elastic arm (7) passing between the support roller (16) and the pressure roller (17), the support roller (16) abutting against the lower side of the elastic arm (7), and the pressure roller (17) abutting against the upper side of the elastic arm (7).

8. The adjustable stiffness vibration damping bracket for electrical equipment according to claim 7, characterized in that, A bidirectional adjusting screw (18) is rotatably connected to the end seat of the slide rail (13). The bidirectional adjusting screw (18) has two threaded sections with opposite directions of rotation. The adjusting slides (14) on both sides are respectively threadedly connected to the corresponding threaded sections. One end of the bidirectional adjusting screw (18) extends to the outside of the protective cover (2) or the outside of the base (1) and is fixedly connected to an adjusting knob (19). The adjusting knob (19) is used to drive the bidirectional adjusting screw (18) to rotate, so as to drive the adjusting slides (14) on both sides to move towards each other or away from each other.

9. An adjustable stiffness vibration damping bracket for electrical equipment according to claim 7, characterized in that, An indicator plate (20) is fixedly connected to the side wall of the adjusting slide (14). An indicator groove (21) is provided on the top of the base (1). One end of the indicator plate (20) extends into the indicator groove (21). The side wall of the indicator groove (21) is connected to the outer wall of the base (1). A transparent scale window (22) is embedded in the indicator groove (21). The transparent scale window (22) is used to display the position of the indicator plate (20).

10. An adjustable stiffness vibration damping bracket for electrical equipment according to claim 1, characterized in that, An edge sealing strip (23) is fixedly connected around the outer periphery of the equipment support plate (6). One end of the edge sealing strip (23) away from the equipment support plate (6) abuts against the inner wall of the protective cover (2). The protective cover (2) is detachably connected to the base (1) and surrounds the outside of the support component and the stiffening component.

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