CN220823414U - Communication cabinet with anti-collision mechanism - Google Patents

Abstract

The utility model relates to the technical field of communication cabinets, in particular to a communication cabinet with an anti-collision mechanism. The technical proposal comprises: the cabinet body, the top of the cabinet body is connected with the protection roof through first buffer gear, the bottom of the cabinet body is connected with the mounting panel through third buffer gear, the mounting panel is connected with the backup pad through the second buffer gear, the installing frame is all installed at both ends around cabinet body both sides outer wall below, the spirit level is installed to the inboard of installing frame, the inside both sides of the cabinet body all are provided with baffle and board-like air filter screen, and the baffle is located one side of board-like air filter screen. The utility model not only effectively makes the cabinet body play a role in buffering in the X-axis direction and the Z-axis direction, but also plays a role in buffering at the top end of the cabinet body, thereby effectively preventing the cabinet body from being damaged due to a certain acting force in the upper direction, the X-axis direction and the Z-axis direction, and realizing the aim of preventing the cabinet body from collision.

Description

Communication cabinet with anti-collision mechanism

Technical Field

The utility model relates to the technical field of communication cabinets, in particular to a communication cabinet with an anti-collision mechanism.

Background

The communication cabinet is a common communication device which can be used under the building of a community, people can transfer network connection through the communication cabinet to transmit data, the purpose of surfing the internet at home is achieved, the communication cabinet is used for machine room equipment such as a telecommunication network and the like, the box body is perfectly combined with the box body, a blind plate and an optical cable clamp are built in, various sizes and various accessories are provided for an economic overall scheme, and the requirements of various professional data distributors are met and superior designs are provided.

Through retrieving, patent bulletin number CN212393071U discloses a mining anticollision communication cabinet, including the communication cabinet body, the inboard fixedly connected with inoxidizing coating of communication cabinet body, the outside fixedly connected with deep floor of communication cabinet body, the top fixedly connected with drive block of communication cabinet body, the interior bottom wall fixedly connected with annular spring of drive block, the top fixedly connected with stopper of annular spring. This mining anticollision communication cabinet, when the left and right sides of communication cabinet body received the striking of external force, through setting up two second anticollision boards, can avoid external force directly to collide with the communication cabinet body, through the cooperation effect between second anticollision board, connecting block, connecting rod, buffer block, extension spring, actuating lever and the air spring, can cushion the external force that communication cabinet body left and right sides bore, prevent that the communication cabinet body from damaging because of the striking, realized the purpose of communication cabinet body anticollision.

Above-mentioned technical scheme can only play buffering anticollision purpose in the top of the cabinet body and X axle direction when in actual use, can not play buffering anticollision purpose in the Z axle direction, receives certain effort easily to lead to equipment damage in the Z axle direction when the cabinet body, for this reason we propose a communication cabinet with anticollision institution and solve current problem.

Disclosure of utility model

The utility model aims to provide a communication cabinet with an anti-collision mechanism, which is used for solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a communication cabinet with anticollision institution, includes the cabinet body, the top of the cabinet body is connected with the protection roof through first buffer gear, the bottom of the cabinet body is connected with the mounting panel through third buffer gear, the mounting panel passes through second buffer gear and is connected with the backup pad, the mounting frame is all installed at the front and back both ends of cabinet body both sides outer wall below, the spirit level is installed to the inboard of mounting frame, the inside both sides of the cabinet body all are provided with baffle and board-like air filter screen, and the baffle is located one side of board-like air filter screen, the board is placed to communication equipment between two double-phase, first screw hole has all been seted up on four corners on the surface of backup pad, threaded rod is installed to first screw hole, and is threaded engagement connection between external screw thread on the threaded rod outer wall and the first screw hole, rotatory regulating plate and supporting base are installed respectively to the top and the bottom of threaded rod, the universal wheel is all installed to both ends around backup pad lower surface both sides.

When the upper part of the cabinet body is subjected to external certain acting force, the first damping cylinder, the first spring and other structures on the first buffer mechanism can play a role in buffering, and when the cabinet body is subjected to external certain acting force in the X-axis direction, the second damping cylinder, the second spring and other structures on the third buffer mechanism can play a role in buffering, and when the cabinet body is subjected to external certain acting force in the Z-axis direction, the second damping cylinder, the second spring and other structures on the second buffer mechanism can play a role in buffering, so that the utility model not only effectively enables the cabinet body to play a role in buffering in the X-axis direction and the Z-axis direction, but also plays a role in buffering at the top end of the cabinet body, the utility model effectively prevents the situation that the cabinet body is damaged due to certain acting force in the upper direction, the X-axis direction and the Z-axis direction, achieves the aim of preventing the cabinet body from collision, the first ventilation slotted hole and the second ventilation slotted hole are arranged to enable outside air to naturally flow in the cabinet body, the plate-type air filter screen can filter dust in the outside air, the situation that the service life of the communication equipment is reduced due to the fact that a large amount of dust in the outside air is adsorbed on the communication equipment is avoided, a worker can drive the supporting base to do linear motion in the Y-axis direction when carrying out forward rotation or reverse rotation on the rotary adjusting plate, when the vertical distance between the bottom of the supporting base and the bottom of the supporting plate is larger than the vertical distance between the bottom of the universal wheel and the bottom of the supporting plate, the utility model can be fixed on the ground through the supporting base, and the worker can adjust the horizontal state of the cabinet body through the level meter, the utility model avoids the situation that the cabinet body tilts to cause toppling, and when the vertical distance between the bottom of the supporting base and the bottom of the supporting plate is smaller than the vertical distance between the bottom of the universal wheel and the bottom of the supporting plate, the utility model can move on the ground through the universal wheel.

Preferably, both ends of the plate-type air filter screen are all installed in the U-shaped groove on the U-shaped clamping plate, and the outer walls of both ends of the plate-type air filter screen are in gap connection with the groove walls of the U-shaped groove on the U-shaped clamping plate, and the U-shaped clamping plate is installed at both sides of the top end and the bottom end in the cabinet body.

Preferably, the first ventilation slotted holes are formed in the outer walls of the two sides of the cabinet body, the second ventilation slotted holes are formed in the outer walls of the partition plates, the safety door is arranged on the front end face of the cabinet body, and the safety lock is arranged on the safety door.

Preferably, the lower surface of the support base is provided with an anti-slip pad.

Preferably, the first buffer mechanism comprises a first fixing plate, a first connecting column, an installation slot, a second connecting column, a strip-shaped slot, a bump, a second fixing plate, a first buffer plate, a first spring and a first damping cylinder, wherein the installation slot is formed in the center of the top end of the second connecting column, the bottom end inside the installation slot is connected with the first buffer plate through the first damping cylinder, and the outer wall of the first buffer plate is in gap connection with the hole wall of the installation slot.

Preferably, the outer side of the outer wall of the first damping cylinder is sleeved with a first spring, protruding blocks are arranged on the outer walls of the two sides of the first buffer plate, the other ends of the protruding blocks are arranged in the strip-shaped slotted holes, gap connection is arranged between the outer walls of the protruding blocks and the hole walls of the strip-shaped slotted holes, the strip-shaped slotted holes are formed in the two sides of the hole walls of the mounting slotted holes, the other side surface of the first buffer plate is connected with the first fixing plate through a first connecting column, and a second fixing plate is arranged at the bottom end of the second connecting column.

Preferably, the second buffer mechanism and the third buffer mechanism all include third fixed plate, connecting plate, second spring, second buffer plate, limiting plate, spacing post, second screw hole, first through-hole, second damping cylinder, second through-hole and fourth fixed plate, the second through-hole has been seted up to the outer wall of second buffer plate, install spacing post in the second through-hole, the both ends of spacing post all run through the first through-hole on the connecting plate outer wall and are connected with the limiting plate, and be gap junction between the outer wall of spacing post and the pore wall of first through-hole and the pore wall of second through-hole.

Preferably, external threads are arranged on the outer walls of the two ends of the limiting column, a second threaded hole is formed in the outer wall of the limiting plate, the external threads on the outer wall of the limiting column are in threaded engagement with the second threaded holes on the limiting plate, the second buffer plate is connected with the connecting plate through a second damping cylinder, a second spring is sleeved on the outer side of the outer wall of the limiting column, the second spring is located between the connecting plate and the second buffer plate, the connecting plate is arranged on two sides of one side surface of the fourth fixing plate, and a third fixing plate is arranged on the top end of the second buffer plate.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, through the matching arrangement of the first buffer mechanism and the protective top plate, when the upper part of the cabinet body is subjected to a certain external acting force, the first buffer mechanism can play a role in buffering under the matching of the first damping cylinder, the first spring and other structures, and through the matching arrangement of the second buffer mechanism, the third buffer mechanism and other structures, when the cabinet body is subjected to a certain external acting force in the X-axis direction, the third buffer mechanism can play a role in buffering under the matching of the second damping cylinder, the second spring and other structures, and when the cabinet body is subjected to a certain external acting force in the Z-axis direction, the second buffer mechanism and other structures can play a role in buffering under the matching of the second damping cylinder, the second spring and other structures, so that the cabinet body can play a role in buffering in the X-axis direction and the Z-axis direction, and the top end of the cabinet body can also play a role in buffering, and the situation that the cabinet body is damaged by the certain external acting force in the X-axis direction and the Z-axis direction is effectively prevented, and the anti-collision cabinet body is realized.

2. According to the utility model, through the matching arrangement of a series of structures such as the plate-type air filter screen, the first ventilation slotted hole, the second ventilation slotted hole and the like, the arrangement of the first ventilation slotted hole and the second ventilation slotted hole can enable outside air to naturally flow in the cabinet body, and the plate-type air filter screen can filter dust in the outside air, so that the situation that the service life of communication equipment is reduced due to the fact that a large amount of dust in the outside air is adsorbed on the communication equipment is avoided.

3. The utility model adopts the matching arrangement of a series of structures such as the rotary adjusting plate, the threaded rod, the supporting base, the universal wheel, the level gauge and the like, when a worker rotates the rotary adjusting plate forward or backward, the supporting base is driven to do linear motion in the Y-axis direction, when the vertical interval between the bottom of the supporting base and the bottom of the supporting plate is larger than the vertical interval between the bottom of the universal wheel and the bottom of the supporting plate, the utility model can be fixed on the ground through the support base, and staff can adjust the horizontal state of the cabinet body through the level meter, so that the situation that the cabinet body tilts to cause tilting is avoided, and when the vertical distance between the bottom of the support base and the bottom of the support plate is smaller than the vertical distance between the bottom of the universal wheel and the bottom of the support plate, the utility model can move on the ground through the universal wheel, thereby having strong practicability.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a cross-sectional view of a second cushioning mechanism and a third cushioning mechanism of the present utility model;

FIG. 4 is a cross-sectional view of a first cushioning mechanism of the present utility model;

fig. 5 is a schematic structural view of the mounting frame of the present utility model.

In the figure: 1. a protective top plate; 2. a first buffer mechanism; 3. a cabinet body; 4. a safety door; 5. a safety lock; 6. rotating the adjusting plate; 7. a first threaded hole; 8. a threaded rod; 9. a support base; 10. an anti-slip pad; 11. a universal wheel; 12. a mounting plate; 13. a support plate; 14. a second buffer mechanism; 1401. a first fixing plate; 1402. a first connection post; 1403. a mounting slot; 1404. a second connection post; 1405. a bar-shaped slot; 1406. a bump; 1407. a second fixing plate; 1408. a first buffer plate; 1409. a first spring; 1410. a first damping cylinder; 15. a first ventilation slot; 16. a mounting frame; 17. a level gauge; 18. a communication device placement board; 19. a partition plate; 20. a U-shaped clamping plate; 21. a plate-type air filter screen; 22. a second ventilation slot; 23. a third buffer mechanism; 2301. a third fixing plate; 2302. a connecting plate; 2303. a second spring; 2304. a second buffer plate; 2305. a limiting plate; 2306. a limit column; 2307. a second threaded hole; 2308. a first through hole; 2309. a second damping cylinder; 2310. a second through hole; 2311. and a fourth fixing plate.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

Example 1

As shown in fig. 1-5, the communication cabinet with the anti-collision mechanism provided by the utility model comprises a cabinet body 3, wherein the top end of the cabinet body 3 is connected with a protection top plate 1 through a first buffer mechanism 2, the bottom end of the cabinet body 3 is connected with a mounting plate 12 through a third buffer mechanism 23, the mounting plate 12 is connected with a supporting plate 13 through a second buffer mechanism 14, mounting frames 16 are respectively arranged at the front end and the rear end below the outer walls of the two sides of the cabinet body 3, a level meter 17 is arranged at the inner side of the mounting frames 16, a partition plate 19 and a plate-type air filter screen 21 are respectively arranged at the two sides of the interior of the cabinet body 3, the partition plate 19 is positioned at one side of the plate-type air filter screen 21, a communication equipment placing plate 18 is arranged between every two adjacent partition plates 19, first threaded holes 7 are respectively formed in four corners of the surface of the supporting plate 13, threaded rods 8 are respectively arranged in the first threaded holes 7, external threads on the outer walls of the threaded rods 8 are respectively connected with the first threaded holes 7 in a threaded manner, a rotation adjusting plate 6 and a supporting base 9 are respectively arranged at the top end and the bottom end of each of the threaded rods 8, and universal wheels 11 are respectively arranged at the front end and rear end of the two sides of the lower surface of the supporting plate 13.

The communication cabinet with the anti-collision mechanism based on the first embodiment has the following working principle: when in use, when the upper part of the cabinet body 3 receives a certain external acting force, the first damping cylinder 1410, the first spring 1409 and other structures on the first buffer mechanism 2 can play a role in buffering, through the matching arrangement of a series of structures such as the second buffer mechanism 14, the third buffer mechanism 23 and the like, when the cabinet body 3 receives a certain external acting force in the X-axis direction, the second damping cylinder 2309, the second spring 2303 and other structures on the third buffer mechanism 23 can play a role in buffering, when the cabinet body 3 receives a certain external acting force in the Z-axis direction, the second damping cylinder 2309, the second spring 2303 and other structures on the second buffer mechanism 14 can play a role in buffering, so that the utility model not only effectively enables the cabinet body 3 to play a role in buffering in the X-axis direction and the Z-axis direction, but also plays a role in buffering at the top end of the cabinet body 3, the utility model effectively prevents the situation that the cabinet body 3 is damaged due to certain acting force in the upper direction, the X-axis direction and the Z-axis direction, achieves the aim of preventing the cabinet body 3 from being crashed, the arrangement of the first ventilation slotted holes 15 and the second ventilation slotted holes 22 can lead the outside air to naturally flow in the cabinet body 3, the plate-type air filter screen 21 can filter dust in the outside air, the situation that the service life of the communication equipment is reduced due to the fact that the dust in the outside air is greatly adsorbed on the communication equipment is avoided, the support base 9 is driven to do linear motion in the Y-axis direction when the working personnel positively rotates or reversely rotates the rotary adjusting plate 6, when the vertical distance between the bottom of the support base 9 and the bottom of the support plate 13 is larger than the vertical distance between the bottom of the universal wheel 11 and the bottom of the support plate 13, the utility model can be fixed on the ground through the support base 9, and the staff can adjust the horizontal state of the cabinet body 3 through the level meter 17, so that the situation that the cabinet body 3 tilts to cause tilting is avoided, and when the vertical distance between the bottom of the supporting base 9 and the bottom of the supporting plate 13 is smaller than the vertical distance between the bottom of the universal wheel 11 and the bottom of the supporting plate 13, the utility model can move on the ground through the universal wheel 11.

Example two

As shown in fig. 1-5, the communication cabinet with the anti-collision mechanism according to the present utility model further includes: both ends of the plate type air filter screen 21 are arranged in the U-shaped groove on the U-shaped clamping plate 20, the outer walls of both ends of the plate type air filter screen 21 are connected with the groove walls of the U-shaped groove on the U-shaped clamping plate 20 in a clearance way, the U-shaped clamping plate 20 is arranged on both sides of the top end and the bottom end inside the cabinet body 3, the outer walls of both sides of the cabinet body 3 are provided with first ventilation groove holes 15, the outer walls of the baffle plate 19 are provided with second ventilation groove holes 22, the front end surface of the cabinet body 3 is provided with a safety door 4, the safety door 4 is provided with a safety lock 5, the lower surface of the supporting base 9 is provided with an anti-skid pad 10, the first buffer mechanism 2 comprises a first fixing plate 1401, a first connecting column 1402, a mounting groove hole 1403, a second connecting column 1404, a strip groove hole 1405, a protruding block 1406, a second fixing plate 1407, a first buffer plate 1408, a first spring 1409 and a first damping cylinder 1410, the central position of the top end of the second connecting column 1404 is provided with a mounting groove hole 1403, the inside bottom of installation slotted hole 1403 is connected with first buffer board 1408 through first damping cylinder 1410, and be gap connection between the outer wall of first buffer board 1408 and the pore wall of installation slotted hole 1403, the outer side cover of the outer wall of first damping cylinder 1410 is equipped with first spring 1409, all install the lug 1406 on the both sides outer wall of first buffer board 1408, the other end of lug 1406 installs in bar slotted hole 1405, and be gap connection between the outer wall of lug 1406 and the pore wall of bar slotted hole 1405, bar slotted hole 1405 is seted up in the pore wall both sides of installation slotted hole 1403, the opposite side surface of first buffer board 1408 is connected with first fixed plate 1401 through first spliced pole 1402, second fixed plate 1407 is installed to the bottom of second spliced pole 1404, second buffer mechanism 14 and third buffer mechanism 23 all include third fixed plate 2301, connecting plate 2302, second spring 2303, second buffer plate 2304, the two ends of the limiting column 2306 penetrate through the first through hole 2308 on the outer wall of the connecting plate 2302 and are connected with the limiting plate 2305, the outer wall of the limiting column 2306 is in clearance connection with the hole wall of the first through hole 2308 and the hole wall of the second through hole 2310, external threads are arranged on the outer walls of the two ends of the limiting column 2306, the second threaded hole 2307 is formed in the outer wall of the limiting plate 2305, the external threads on the outer wall of the limiting column 2306 are in threaded engagement connection with the second threaded hole 2307 on the limiting plate 2305, the second buffer plate 2304 is connected with the connecting plate 2302 through the second damping cylinder 2309, a second spring 2303 is sleeved on the outer side of the outer wall of the limiting column 2306 and is located between the connecting plate 2302 and the second buffer plate 2304, and the top end of the third buffer plate 2301 is mounted on the top end of the fourth fixing plate 2311.

In this embodiment, because both ends of the plate type air filter 21 are all installed in the U-shaped slot on the U-shaped clamping plate 20, and the outer walls of both ends of the plate type air filter 21 are all connected with the slot wall of the U-shaped slot on the U-shaped clamping plate 20 by a gap, thereby being convenient for a worker to disassemble, assemble and replace or clean the plate type air filter 21, the anti-slip pad 10 increases the friction force between the supporting base 9 and the contact object, because the outer wall of the first buffer plate 1408 is connected with the slot wall of the installation slot 1403 by a gap, the two side outer walls of the first buffer plate 1408 are all provided with the protruding blocks 1406, the other ends of the protruding blocks 1406 are installed in the strip-shaped slot 1405, and the outer wall of the protruding blocks 1406 is connected with the slot wall of the strip-shaped slot 1405 by a gap, thereby playing a role in limiting and guiding the movement of the buffer plate 1408, and playing a role in limiting and guiding the movement of the second buffer plate 2304 by a gap between the outer wall of the limiting column 2306 and the slot wall of the first through hole 2308 and the second through hole 2310.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims (8)

1. Communication cabinet with anticollision institution, including the cabinet body (3), its characterized in that: the utility model discloses a novel multifunctional electric cabinet, including cabinet body (3), mounting panel (13), communication equipment, threaded rod (8) are installed in first screw hole (7), and install level gauge (17) between the front and back both ends on the outer wall of cabinet body (3) both sides below respectively, level gauge (17) are installed to the inboard of mounting frame (16), the inside both sides of cabinet body (3) all are provided with baffle (19) and board-like airstrainer (21), and baffle (19) are located one side of board-like airstrainer (21), communication equipment is installed between two double-phase between baffle (19) and is placed board (18), four corners on the surface of backup pad (13) have all been seted up first screw hole (7), install threaded rod (8) in first screw hole (7), and be threaded engagement connection between the external screw thread on the outer wall of threaded rod (8) and first screw hole (7), top (8) and board-like airstrainer (6) are installed respectively to the bottom end (9) and are installed to the universal wheel (13) both sides after the base (11) are installed respectively.

2. A communications cabinet with anti-collision mechanism as claimed in claim 1, wherein: both ends of the plate-type air filter screen (21) are all installed in the U-shaped groove on the U-shaped clamping plate (20), and the outer walls of both ends of the plate-type air filter screen (21) are in clearance connection with the groove walls of the U-shaped groove on the U-shaped clamping plate (20), and the U-shaped clamping plate (20) is installed on both sides of the top end and the bottom end inside the cabinet body (3).

3. A communications cabinet with anti-collision mechanism as claimed in claim 1, wherein: the novel safe cabinet is characterized in that first ventilation slots (15) are formed in the outer walls of two sides of the cabinet body (3), second ventilation slots (22) are formed in the outer walls of the partition plates (19), a safety door (4) is arranged on the front end face of the cabinet body (3), and a safety lock (5) is arranged on the safety door (4).

4. A communications cabinet with anti-collision mechanism as claimed in claim 1, wherein: the lower surface of the supporting base (9) is provided with an anti-slip pad (10).

5. A communications cabinet with anti-collision mechanism as claimed in claim 1, wherein: the first buffer mechanism (2) comprises a first fixed plate (1401), a first connecting column (1402), a mounting groove hole (1403), a second connecting column (1404), a strip-shaped groove hole (1405), a protruding block (1406), a second fixed plate (1407), a first buffer plate (1408), a first spring (1409) and a first damping cylinder (1410), the mounting groove hole (1403) is formed in the center of the top end of the second connecting column (1404), the bottom end inside the mounting groove hole (1403) is connected with the first buffer plate (1408) through the first damping cylinder (1410), and the outer wall of the first buffer plate (1408) is in clearance connection with the hole wall of the mounting groove hole (1403).

6. A communications cabinet with anti-collision mechanism as claimed in claim 5, wherein: the outer side of the outer wall of the first damping cylinder (1410) is sleeved with a first spring (1409), protruding blocks (1406) are arranged on the outer walls of two sides of the first buffer plate (1408), the other ends of the protruding blocks (1406) are arranged in the strip-shaped slotted holes (1405), the outer walls of the protruding blocks (1406) are in clearance connection with the hole walls of the strip-shaped slotted holes (1405), the strip-shaped slotted holes (1405) are formed in two sides of the hole walls of the mounting slotted holes (1403), the other side surface of the first buffer plate (1408) is connected with the first fixing plate (1401) through first connecting columns (1402), and second fixing plates (1407) are arranged at the bottom ends of the second connecting columns (1404).

7. A communications cabinet with anti-collision mechanism as claimed in claim 1, wherein: the second buffer mechanism (14) and the third buffer mechanism (23) comprise a third fixing plate (2301), a connecting plate (2302), a second spring (2303), a second buffer plate (2304), a limiting plate (2305), a limiting column (2306), a second threaded hole (2307), a first through hole (2308), a second damping cylinder (2309), a second through hole (2310) and a fourth fixing plate (2311), the second through hole (2310) is formed in the outer wall of the second buffer plate (2304), the limiting column (2306) is installed in the second through hole (2310), two ends of the limiting column (2306) penetrate through a first through hole (2308) in the outer wall of the connecting plate (2302) and are connected with the limiting plate (2305), and a gap is formed between the outer wall of the limiting column (2306) and the hole wall of the first through hole (2308) and the hole wall of the second through hole (2310).

8. A communications cabinet with anti-collision mechanism as claimed in claim 7, wherein: the two ends of the limiting column (2306) are respectively provided with external threads, the outer walls of the limiting plates (2305) are provided with second threaded holes (2307), the external threads on the outer walls of the limiting column (2306) are in threaded engagement with the second threaded holes (2307) on the limiting plates (2305), the second buffer plates (2304) are connected with the connecting plates (2302) through second damping cylinders (2309), the outer sides of the outer walls of the limiting column (2306) are sleeved with second springs (2303), the second springs (2303) are located between the connecting plates (2302) and the second buffer plates (2304), the connecting plates (2302) are mounted on two sides of one side surface of the fourth fixing plate (2311), and the top ends of the second buffer plates (2304) are provided with third fixing plates (2301).