Protective structure for frequency converter for industrial automatic control instrument

Abstract

The invention relates to the technical field of protection engineering, and discloses a protection structure for a frequency converter for an industrial automatic control instrument, which comprises a frequency modulator and a protection plate, and further comprises a damping mechanism arranged on the inner wall of the protection plate, and the damping mechanism comprises a bolt, the outer wall of the bolt penetrates through the outer wall of the frequency modulator and is in threaded connection with the inner wall of the fixing sleeve through threads, the outer wall of the fixing sleeve is slidably connected with the inner wall of the sliding rod, the bottom of the sliding rod is fixedly connected with the top of the first connecting rod, the bottom of the first connecting rod is fixedly connected with the top of the fixing rod, and a clamping mechanism is arranged at the bottom of the fixing rod. And a supporting mechanism is arranged in the clamping mechanism. Through the arrangement of the sliding mechanism, collision impact on the frequency converter during working is damped and buffered through the sliding mechanism, the frequency converter is prevented from being collided and running interruption is prevented, and the protection structure used for the frequency converter for the industrial automatic control instrument can be normally used.

Description

Technical Field

[0001] The invention relates to the technical field of protective engineering, in particular to a protective structure used by a frequency converter for an industrial automatic control instrument. Background Art

[0002] With the rapid development of industrial automation, frequency converters are widely used in industrial automatic control instruments. The industrial environment is complex. In order to protect the internal circuit components of the frequency converter and enable it to operate stably in harsh environments, frequency converter protection structures for industrial automatic control instruments have emerged to ensure that the frequency converter can operate reliably in the industrial environment and ensure the smooth progress of industrial automation production.

[0003] A patent application with application number CN202021541741.8 discloses a protective structure used in a frequency converter, including a protective shell, a sliding mounting seat, and a mechanical password lock. A protective door is hingedly connected to the protective shell, two groups of slide slot seats are fixedly connected to the bottom of the protective shell, the sliding mounting seat is slidably connected in the slide slot seat, and a plurality of groups of strip holes are arranged on the bottom plate of the sliding mounting seat. A heat dissipation port is arranged at the bottom of the protective shell, and a heat dissipation device is fixedly installed in the heat dissipation port. A mechanical password lock is embedded in the protective shell, a first rotating shaft is fixedly connected to the bottom of the bottom plate, and a second rotating shaft is fixedly installed on the protective door. One end of the telescopic connecting rod is rotatably connected to the first rotating shaft, and the other end is rotatably connected to the second rotating shaft.

[0004] However, the protective structures used in existing frequency converters often perform poorly when faced with equipment vibration, collision, etc. These factors may cause the frequency converter to interrupt operation, affecting the continuity of industrial production and limiting the use of protective structures used in frequency converters for industrial automatic control instruments. Summary of the invention

[0005] The object of the present invention is to provide a protective structure used in a frequency converter for an industrial automatic control instrument to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a protective structure used for a frequency converter for an industrial automatic control instrument, comprising a frequency modulator and a protective plate, and also comprising:

[0007] A shock absorbing mechanism, wherein the shock absorbing mechanism is arranged on the inner wall of the protective plate, the shock absorbing mechanism comprises a bolt, the outer wall of the bolt penetrates the outer wall of the frequency modulator and is threadedly connected to the inner wall of the fixing sleeve through a thread, the outer wall of the fixing sleeve is slidably connected to the inner wall of the sliding rod, the bottom of the sliding rod is fixedly connected to the top of the connecting rod, the bottom of the connecting rod is fixedly connected to the top of the fixing rod, the bottom of the fixing rod is provided with a clamping mechanism, and a supporting mechanism is provided inside the clamping mechanism;

[0008] Sliding mechanism, the sliding mechanism is arranged on the outer wall of the sliding rod. The sliding mechanism includes a first sliding sleeve. The inner wall of the first sliding sleeve is slidably connected to the outer wall of the sliding rod. The inner wall of the first sliding sleeve is hingedly connected to the inner wall of the hinge sleeve through a rotating shaft. The inner wall of the hinge sleeve on the side away from the first sliding sleeve is hingedly connected to the inner wall of the support sleeve through a rotating shaft. The bottom of the support sleeve is fixedly connected to the top of the first support rod. The outer wall of the first support rod is slidably connected to the inner wall of the connecting sleeve. The outer wall of the first support rod is slidably connected to the inner wall of the second sliding sleeve. A first spring is arranged on the outer wall of the first support rod. One end of the first spring is fixedly connected to the bottom of the connecting sleeve, and the other end is fixedly connected to the outer wall of the second sliding sleeve. The end of the connecting sleeve away from the first support rod is hingedly connected to the outer wall of the first support block through a hinge block. The outer wall of the first support block is slidably connected to the inner wall of the protective plate through a slider.

[0009] According to the above technical solution, the clamping mechanism includes a first support plate. The outer wall of the first support plate is slidably connected to the inner wall of the frequency modulator. A sliding groove is formed on the outer wall of the first support plate. The groove wall of the sliding groove is slidably connected to the outer wall of the clamping plate through a slider. The outer wall of the clamping plate is clamped to the inner wall of the frequency modulator. A resilient plate is arranged inside the sliding groove. The top of the resilient plate is fixedly connected to the bottom of the clamping plate, and the bottom of the resilient plate is slidably connected to the groove wall of the sliding groove.

[0010] According to the above technical solution, the outer wall of the clamping plate is fixedly connected to one end of the second connecting rod close to the clamping plate. The end of the second connecting rod away from the clamping plate penetrates the inner wall of the sliding groove and is hingedly connected to one end of the first hinge rod close to the second connecting rod through a rotating shaft. The end of the first hinge rod away from the second connecting rod is hingedly connected to the outer wall of the support disc through a rotating shaft.

[0011] According to the above technical solution, the support mechanism includes a fixing plate. The outer wall of the fixing plate is fixedly connected to the outer wall of the first support plate. The inner wall of the fixing plate is slidably connected to the outer wall of the second support rod. One end of the second support rod close to the frequency modulator is fixedly connected to the outer wall of the second support block. A compensation component is arranged inside the fixing plate.

[0012] According to the above technical solution, the outer wall of the second support rod on the side away from the fixing plate is slidably connected to the inner wall of the second support plate. The inner wall of the second support plate is slidably connected to the outer wall of the third support rod. A second spring is arranged on the outer wall of the third support rod. One end of the second spring is fixedly connected to the inner wall of the second support plate, and the other end is fixedly connected to the outer wall of the third support rod. The inner wall of the third support rod is covered and connected to the outer wall of the ball.

[0013] According to the above technical solution, the compensation component includes a second hinge rod. One end of the second hinge rod close to the fixed plate is hingedly connected to the inner wall of the fixed plate through a rotating shaft. The outer wall of the second hinge rod away from the fixed plate is slidably connected to the inner wall of the third sliding sleeve. The inner wall of the third sliding sleeve away from the second hinge rod is slidably connected to the outer wall of the third hinge rod. A third spring is arranged on the inner wall of the third sliding sleeve. One end of the third spring is fixedly connected to the outer wall of the second hinge rod, and the other end is fixedly connected to the outer wall of the third hinge rod.

[0014] According to the above technical solution, the inner wall of the second sliding sleeve is slidably connected to the outer wall of the first support plate. The inner wall of the connecting sleeve is slidably connected to the outer wall of the first connecting rod. The bottom of the fixed rod is fixedly connected to the outer wall of the second support plate. The number of the shock absorption mechanisms is two groups, and the two groups of shock absorption mechanisms are equidistantly arranged on the outer wall of the second support plate with the center line of the second support rod as the rotation axis.

[0015] According to the above technical solution, the number of the first support plates, the clamping plates and the elastic plates is two groups each. The two groups of the first support plates, the clamping plates and the elastic plates are symmetrically arranged on the inner wall of the frequency modulator with the center line of the support disc as the axis of symmetry.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The protection structure used for the frequency converter of the industrial automatic control instrument is provided with a sliding mechanism, so that the equipment vibration and collision impact received by the frequency converter during operation are shock-absorbed and buffered through the sliding mechanism, preventing the frequency converter from being interrupted due to vibration or collision, and enabling the protection structure used for the frequency converter of the industrial automatic control instrument to be used normally.

[0018] 2. The protection structure used for the frequency converter of the industrial automatic control instrument is provided with a clamping mechanism, so that the frequency converter is firmly connected through the clamping mechanism and supported by the clamping mechanism, preventing the frequency converter from falling off due to equipment vibration or collision, and enabling the protection structure used for the frequency converter of the industrial automatic control instrument to be used normally.

[0019] 3. The protection structure used for the frequency converter of the industrial automatic control instrument is provided with a support mechanism, which supports the gap between the frequency converter and the protection plate through the support mechanism and shock-absorbs the frequency converter through the support mechanism, preventing the frequency converter from vibrating strongly due to equipment vibration or collision, and enabling the protection structure used for the frequency converter of the industrial automatic control instrument to be used normally.

[0020] 4. The protection structure used for the frequency converter of the industrial automatic control instrument is provided with a compensation component. When the frequency converter and the protection plate are vibrated or collided, the compensation component effectively supports the sliding mechanism and the support mechanism, so that the sliding mechanism and the support mechanism effectively shock-absorb the frequency converter, and enabling the protection structure used for the frequency converter of the industrial automatic control instrument to be used normally. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural view of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 is a schematic structural view of the shock-absorbing mechanism of the present invention;

[0024] Figure 4 is a schematic structural view of the sliding mechanism of the present invention;

[0025] Figure 5 is a schematic structural view of the clamping mechanism of the present invention;

[0026] Figure 6 is a schematic structural view of the support mechanism of the present invention;

[0027] Figure 7 is a cross-sectional view of the second support plate in the support mechanism of the present invention;

[0028] Figure 8 is a cross-sectional view of the compensation component of the present invention.

[0029] In the figures: 1, frequency modulator; 2, protective plate; 3, shock-absorbing mechanism; 301, bolt; 302, fixed sleeve; 303, sliding rod; 304, connecting rod I; 305, fixed rod; 31, sliding mechanism; 311, sliding sleeve I; 312, hinged sleeve; 313, support sleeve; 314, support rod I; 315, connecting sleeve; 316, support block I; 317, spring I; 318, sliding sleeve II; 4, clamping mechanism; 401, support plate I; 402, sliding groove; 403, clamping plate; 404, elastic plate; 405, connecting rod II; 406, hinged rod I; 407, support disc; 5, support mechanism; 501, fixing plate; 502, support rod II; 503, support block II; 504, support plate II; 505, support rod III; 506, spring II; 507, ball; 51, compensation component; 511, hinged rod II; 512, sliding sleeve III; 513, hinged rod III; 514, spring III. Detailed Description of the Preferred Embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Example 1, please refer to Figures 1 - 4, the present invention provides a technical solution: a protective structure for a frequency converter used in an industrial automatic control instrument, including a frequency modulator 1 and a protective plate 2, further including:

[0032] A shock absorption mechanism 3, the shock absorption mechanism 3 is arranged on the inner wall of the protective plate 2. The shock absorption mechanism 3 includes a bolt 301. The outer wall of the bolt 301 penetrates through the outer wall of the frequency modulator 1 and is threadedly connected with the inner wall of a fixed sleeve 302. The outer wall of the fixed sleeve 302 is slidably connected with the inner wall of a sliding rod 303. The bottom of the sliding rod 303 is fixedly connected to the top of a connecting rod 304. The bottom of the connecting rod 304 is fixedly connected to the top of a fixed rod 305. A clamping mechanism 4 is arranged at the bottom of the fixed rod 305, and a support mechanism 5 is arranged inside the clamping mechanism 4;

[0033] A sliding mechanism 31, the sliding mechanism 31 is arranged on the outer wall of the sliding rod 303. The sliding mechanism 31 includes a first sliding sleeve 311. The inner wall of the first sliding sleeve 311 is slidably connected with the outer wall of the sliding rod 303. The inner wall of the first sliding sleeve 311 is hingedly connected with the inner wall of a hinge sleeve 312 through a rotating shaft. The inner wall of the hinge sleeve 312 on the side away from the first sliding sleeve 311 is hingedly connected with the inner wall of a support sleeve 313 through a rotating shaft. The bottom of the support sleeve 313 is fixedly connected to the top of a first support rod 314. The outer wall of the first support rod 314 is slidably connected with the inner wall of a connecting sleeve 315. At the same time, the inner wall of the connecting sleeve 315 and the outer wall of the first support rod 314 are rotationally connected through a bearing. When the protective plate 2 is collided in the vertical direction, it is transmitted through a first support block 316, driving the connecting sleeve 315 to compress a first spring 317 and slide down on the outer wall of the first support rod 314. When the protective plate 2 is collided in the horizontal direction, it is hingedly connected through the hinge sleeve 312 and the support sleeve 313, driving the connecting sleeve 315 to rotate on the outer wall of the first support rod 314, and driving the support mechanism 5 to support and shock-absorb the protective plate 2 through the sliding rod 303. The outer wall of the first support rod 314 is slidably connected with the inner wall of a second sliding sleeve 318. A first spring 317 is arranged on the outer wall of the first support rod 314. One end of the first spring 317 is fixedly connected to the bottom of the connecting sleeve 315, and the other end is fixedly connected to the outer wall of the second sliding sleeve 318. One end of the connecting sleeve 315 away from the first support rod 314 is hingedly connected to the outer wall of the first support block 316 through a hinge block. The outer wall of the first support block 316 is slidably connected with the inner wall of the protective plate 2 through a slider;

[0034] The inner wall of the second sliding sleeve 318 is slidably connected with the outer wall of a first support plate 401. The inner wall of the connecting sleeve 315 is slidably connected with the outer wall of the connecting rod 304. The bottom of the fixed rod 305 is fixedly connected to the outer wall of a second support plate 504. The number of the shock absorption mechanisms 3 is two groups, and the two groups of shock absorption mechanisms 3 are equidistantly arranged on the outer wall of the second support plate 504 with the center line of a second support rod 502 as the rotation axis.

[0035] The working principle of this embodiment is as follows: When the protective structure used in the frequency converter of industrial automatic control instruments is put into use, the frequency modulator 1 is connected to the fixed sleeve 302 through the bolt 301. By tightening the bolt 301, the shock-absorbing mechanism 3 drives the clamping mechanism 4 to be clamped and fixed to the inner wall of the frequency modulator 1, and the frequency modulator 1 and the protective plate 2 are supported by the support mechanism 5, so that the frequency modulator 1 is fixed inside the protective plate 2, and the frequency modulator 1 is protected by the protective plate 2. When the protective plate 2 is collided in the vertical direction, it is transmitted through the first support block 316, driving the connecting sleeve 315 to compress the first spring 317 and slide down on the outer wall of the first support rod 314. When the protective plate 2 is collided in the horizontal direction, it is hinged to the support sleeve 313 through the hinge sleeve 312, driving the connecting sleeve 315 to rotate on the outer wall of the first support rod 314, and driving the support mechanism 5 to support and shock-absorb the protective plate 2 through the sliding rod 303.

[0036] Embodiment 2. Please refer to Figure 5 , the present invention provides a technical solution: The clamping mechanism 4 includes a first support plate 401, the outer wall of the first support plate 401 is slidably connected to the inner wall of the frequency modulator 1, a sliding groove 402 is opened on the outer wall of the first support plate 401, the groove wall of the sliding groove 402 is slidably connected to the outer wall of the clamping plate 403 through a slider, the outer wall of the clamping plate 403 is clamped to the inner wall of the frequency modulator 1, and an elastic plate 404 is arranged inside the sliding groove 402. The top of the elastic plate 404 is fixedly connected to the bottom of the clamping plate 403, and the bottom of the elastic plate 404 is slidably connected to the groove wall of the sliding groove 402;

[0037] The outer wall of the clamping plate 403 is fixedly connected to one end of the second connecting rod 405 close to the clamping plate 403. The other end of the second connecting rod 405 away from the clamping plate 403 penetrates the inner wall of the sliding groove 402 and is hinged to one end of the first hinge rod 406 close to the second connecting rod 405 through a rotating shaft. The other end of the first hinge rod 406 away from the second connecting rod 405 is hinged to the outer wall of the support disk 407 through a rotating shaft. The inner wall of the support disk 407 is slidably connected to the outer wall of the second support rod 502;

[0038] The number of the first support plates 401, the clamping plates 403 and the elastic plates 404 is two groups each. The two groups of the first support plates 401, the clamping plates 403 and the elastic plates 404 are symmetrically arranged on the inner wall of the frequency modulator 1 with the center line of the support disk 407 as the axis of symmetry.

[0039] The working principle of this embodiment is as follows: By tightening the bolt 301, the shock absorption mechanism 3 drives the first support plate 401 to slide on the inner wall of the frequency modulator 1. The clamping plate 403 slides on the inner wall of the sliding groove 402 by being squeezed by the elastic plate 404 and is clamped to the inner wall of the frequency modulator 1. At the same time, the clamping plate 403 is supported by the support plate 407 and the first articulated rod 406, so that the clamping plate 403 is stably clamped to the inner wall of the frequency modulator 1. At the same time, the support mechanism 5 supports the support plate 407 and the first support plate 401 to prevent the clamping plate 403 from vibrating at the clamping joint with the frequency modulator 1 when being vibrated, resulting in the detachment of the frequency modulator 1.

[0040] Embodiment 3. Based on Embodiment 1, please refer to Figures 6 - 8 , the technical solution provided by the present invention is: The support mechanism 5 includes a fixing plate 501. The outer wall of the fixing plate 501 is fixedly connected to the outer wall of the first support plate 401. The inner wall of the fixing plate 501 is slidably connected to the outer wall of the second support rod 502. One end of the second support rod 502 close to the frequency modulator 1 is fixedly connected to the outer wall of the second support block 503. A compensation assembly 51 is provided on the inner wall of the fixing plate 501;

[0041] The outer wall of the second support rod 502 on the side away from the fixing plate 501 is slidably connected to the inner wall of the second support plate 504. The inner wall of the second support plate 504 is slidably connected to the outer wall of the third support rod 505. A second spring 506 is provided on the outer wall of the third support rod 505. One end of the second spring 506 is fixedly connected to the inner wall of the second support plate 504, and the other end is fixedly connected to the outer wall of the third support rod 505. The inner wall of the third support rod 505 is covered and connected to the outer wall of the ball 507. The ball 507 is pressed against the third support rod 505 by the second spring 506 and contacts the inner wall of the protection plate 2, while supporting the protection plate 2 and buffering and damping when the protection plate 2 is collided;

[0042] The compensation assembly 51 includes a second articulated rod 511. One end of the second articulated rod 511 close to the fixing plate 501 is hinged to the inner wall of the fixing plate 501 through a rotating shaft. The outer wall of the second articulated rod 511 on the side away from the fixing plate 501 is slidably connected to the inner wall of the third sliding sleeve 512. The inner wall of the third sliding sleeve 512 on the side away from the second articulated rod 511 is slidably connected to the outer wall of the third articulated rod 513. A third spring 514 is provided on the inner wall of the third sliding sleeve 512. One end of the third spring 514 is fixedly connected to the outer wall of the second articulated rod 511, and the other end is fixedly connected to the outer wall of the third articulated rod 513.

[0043] The working principle of this embodiment is as follows: When the protection plate 2 is collided, the protection plate 2 generates displacement, drives the ball 507 to rotate, and drives the support rod three 505 to compress the spring two 506, so that the support plate two 504 contacts the inner wall of the protection plate 2 and supports and dampens the protection plate 2 through the support plate two 504. The support plate two 504 drives the articulated rod two 511 and the articulated rod three 513 to compress the spring three 514 for distance compensation adjustment and buffer damping. The support plate two 504 drives the fixed rod 305 and the sliding rod 303 to slide on the outer wall of the fixed sleeve 302, and the displacement generated by the protection plate 2 is dampened and adjusted through the sliding mechanism 31, protecting the frequency modulator 1 while driving the protection plate 2 to reset.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protection structure for a frequency converter used in an industrial automatic control instrument, including a frequency modulation device (1) and a protection plate (2), characterized in that, It further includes: A shock absorption mechanism (3), the shock absorption mechanism (3) is arranged on the inner wall of the protection plate (2), the shock absorption mechanism (3) includes a bolt (301), the outer wall of the bolt (301) penetrates through the outer wall of the frequency modulator (1) and is threadedly connected with the inner wall of the fixed sleeve (302) through threads, the outer wall of the fixed sleeve (302) is slidably connected with the inner wall of the sliding rod (303), the bottom of the sliding rod (303) is fixedly connected with the top of the first connecting rod (304), the bottom of the first connecting rod (304) is fixedly connected with the top of the fixed rod (305), a clamping mechanism (4) is arranged at the bottom of the fixed rod (305), and a support mechanism (5) is arranged inside the clamping mechanism (4); A sliding mechanism (31), the sliding mechanism (31) is arranged on the outer wall of the sliding rod (303), the sliding mechanism (31) includes a first sliding sleeve (311), the inner wall of the first sliding sleeve (311) is slidably connected with the outer wall of the sliding rod (303), the inner wall of the first sliding sleeve (311) is hingedly connected with the inner wall of the hinge sleeve (312) through a rotating shaft, the inner wall of the hinge sleeve (312) on the side away from the first sliding sleeve (311) is hingedly connected with the inner wall of the support sleeve (313) through a rotating shaft, the bottom of the support sleeve (313) is fixedly connected with the top of the first support rod (314), the outer wall of the first support rod (314) is slidably connected with the inner wall of the connecting sleeve (315), the outer wall of the first support rod (314) is slidably connected with the inner wall of the second sliding sleeve (318), a first spring (317) is arranged on the outer wall of the first support rod (314), one end of the first spring (317) is fixedly connected with the bottom of the connecting sleeve (315), and the other end is fixedly connected with the outer wall of the second sliding sleeve (318), one end of the connecting sleeve (315) away from the first support rod (314) is hingedly connected with the outer wall of the first support block (316) through a hinge block, and the outer wall of the first support block (316) is slidably connected with the inner wall of the protection plate (2) through a slider.

2. The protective structure used for the frequency converter of an industrial automatic control instrument according to claim 1, characterized in that: The clamping mechanism (4) includes a first support plate (401), the outer wall of the first support plate (401) is slidably connected with the inner wall of the frequency modulator (1), a sliding groove (402) is formed in the outer wall of the first support plate (401), the groove wall of the sliding groove (402) is slidably connected with the outer wall of the clamping plate (403) through a slider, the outer wall of the clamping plate (403) is clamped with the inner wall of the frequency modulator (1), an elastic plate (404) is arranged inside the sliding groove (402), the top of the elastic plate (404) is fixedly connected with the bottom of the clamping plate (403), and the bottom of the elastic plate (404) is slidably connected with the groove wall of the sliding groove (402).

3. The protection structure used for the frequency converter of an industrial automatic control instrument according to claim 2, characterized in that: The outer wall of the clamping plate (403) is fixedly connected with one end of the second connecting rod (405) close to the clamping plate (403), the other end of the second connecting rod (405) away from the clamping plate (403) penetrates through the inner wall of the sliding groove (402) and is hingedly connected with one end of the first hinge rod (406) close to the second connecting rod (405) through a rotating shaft, and the other end of the first hinge rod (406) away from the second connecting rod (405) is hingedly connected with the outer wall of the support disc (407) through a rotating shaft.

4. The protection structure used for the frequency converter of an industrial automatic control instrument according to claim 1, wherein: The support mechanism (5) includes a fixing plate (501). The outer wall of the fixing plate (501) is fixedly connected to the outer wall of the first support plate (401). The inner wall of the fixing plate (501) is slidably connected to the outer wall of the second support rod (502). One end of the second support rod (502) close to the frequency modulator (1) is fixedly connected to the outer wall of the second support block (503). A compensation assembly (51) is provided on the inner wall of the fixing plate (501).

5. The protective structure used for the frequency converter of an industrial automatic control instrument according to claim 4, characterized in that: One side outer wall of the second support rod (502) away from the fixing plate (501) is slidably connected to the inner wall of the second support plate (504). The inner wall of the second support plate (504) is slidably connected to the outer wall of the third support rod (505). A second spring (506) is provided on the outer wall of the third support rod (505). One end of the second spring (506) is fixedly connected to the inner wall of the second support plate (504), and the other end is fixedly connected to the outer wall of the third support rod (505). The inner wall of the third support rod (505) is covered and connected to the outer wall of the ball (507).

6. The protective structure used for the frequency converter of an industrial automatic control instrument according to claim 4, characterized in that: The compensation assembly (51) includes a second articulated rod (511). One end of the second articulated rod (511) close to the fixing plate (501) is hinged to the inner wall of the fixing plate (501) through a rotating shaft. The outer wall of one side of the second articulated rod (511) away from the fixing plate (501) is slidably connected to the inner wall of the third sliding sleeve (512). The inner wall of the third sliding sleeve (512) away from the second articulated rod (511) is slidably connected to the outer wall of the third articulated rod (513). A third spring (514) is provided on the inner wall of the third sliding sleeve (512). One end of the third spring (514) is fixedly connected to the outer wall of the second articulated rod (511), and the other end is fixedly connected to the outer wall of the third articulated rod (513).

7. The protective structure used for the frequency converter of an industrial automatic control instrument according to claim 1, wherein: The inner wall of the second sliding sleeve (318) is slidably connected to the outer wall of the first support plate (401). The inner wall of the connecting sleeve (315) is slidably connected to the outer wall of the first connecting rod (304). The bottom of the fixed rod (305) is fixedly connected to the outer wall of the second support plate (504). The number of the damping mechanisms (3) is two groups. The two groups of damping mechanisms (3) are equidistantly arrayed on the outer wall of the second support plate (504) with the center line of the second support rod (502) as the rotation axis.

8. The protective structure used for the frequency converter of an industrial automatic control instrument according to claim 2, characterized in that: The number of the first support plates (401), the clamping plates (403) and the elastic plates (404) is two groups each. The two groups of the first support plates (401), the clamping plates (403) and the elastic plates (404) are symmetrically arranged on the inner wall of the frequency modulator (1) with the center line of the support disk (407) as the axis of symmetry.

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