Roof acoustic shield for high-speed rail carriage

Abstract

The invention relates to the field of vehicle design, in particular to a roof acoustic hood for a high-speed rail carriage, which comprises a hood body, the hood body is fixedly mounted on a carriage top plate, a sound insulation base plate is fixedly arranged at the upper end of the carriage top plate, a first sound insulation plate and a second sound insulation plate are arranged in the hood body at an interval from top to bottom, and heat dissipation holes are formed in the upper end of the hood body in a penetrating manner. An extending shell is arranged on one side of the cover body, a control assembly is arranged in the extending shell, and the control assembly is in transmission fit with the first sound insulation plate and the second sound insulation plate. The cover body can be automatically switched between the heat dissipation mode and the sound insulation mode according to the internal temperature, effective heat dissipation can be conducted on the cover body during heat dissipation, the internal temperature of the cover body is effectively reduced, multiple closed cavities can be formed during sound insulation, air flowing is prevented, sound wave and heat transfer is greatly hindered, and the heat dissipation efficiency is improved. And the sound insulation and heat preservation effects are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle design, and particularly relates to a roof sound insulation cover for a high-speed rail carriage. Background Art

[0002] As an important part of modern transportation, the high-speed rail industry has become the backbone of the transportation network and is developing towards the direction of intelligence, greenness, and globalization. With the continuous progress of high-speed rail technology and the deepening of its application, higher performance design requirements have been put forward for the carriage structure during high-speed rail operation, and the demand for sound insulation and noise reduction is becoming increasingly urgent.

[0003] The pantograph noise is one of the main noise sources of high-speed multiple units. The interior noise corresponding to this area has always been a difficult point in the noise control of high-speed multiple units. Currently, sound insulation covers are usually installed in this area of high-speed rail carriages to suppress the pantograph noise. However, the existing sound insulation covers often adopt a closed structure. After being exposed to long-term sunlight, the temperature inside is relatively high, and the heat dissipation performance of the current sound insulation cover structure is poor, posing certain potential fire safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to provide a roof sound insulation cover for a high-speed rail carriage, aiming to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A roof sound insulation cover for a high-speed rail carriage includes a cover body, the cover body is fixedly installed on the carriage roof plate, a sound insulation backing plate is fixedly arranged on the upper end of the carriage roof plate, a first sound insulation board and a second sound insulation board are arranged at intervals from top to bottom inside the cover body, heat dissipation holes are arranged through the upper end of the cover body, an extended housing is arranged on one side of the cover body, a control component is arranged inside the extended housing, and the control component is in transmission cooperation with the first sound insulation board and the second sound insulation board respectively.

[0007] The control assembly comprises an electric lifting rod, a shaft rod and a driving rod. The electric lifting rod is fixedly mounted on the upper end of the extension shell. The output end of the electric lifting rod is rotatably matched with the top end of the shaft rod. The shaft rod is provided with an upper shell body at the upper limit position. The shaft rod is also provided with a lower shell body movably mounted. An upper connecting plate is extended on one side of the upper shell body. A first limiting roller is rotatably mounted on the bottom of the upper connecting plate. A first limiting groove is horizontally arranged on the surface of the first sound insulation board. The first limiting roller is adapted to be slidably mounted in the first limiting groove. A lower connecting plate is extended on one side of the lower shell body. A second limiting roller is rotatably mounted on the bottom of the lower connecting plate. A second limiting groove is horizontally arranged on the surface of the second sound insulation board. The first limiting roller is adapted to be slidably mounted in the second limiting groove. The driving rod is fixedly connected to the bottom of the shaft rod. Through holes are penetrated through the first sound insulation board, the second sound insulation board and the sound insulation pad.

[0008] As a further solution of the present invention: a rotating connecting part is provided at the top end of the shaft rod, the output end of the electric lifting rod is rotatably matched with the rotating connecting part, a limiting part is provided on the shaft rod, the upper shell is limitedly installed in the limiting part, a blocking part is provided at the bottom of the shaft rod, and a matching groove is provided at the bottom of the lower shell, and the blocking part is movably installed in the matching groove.

[0009] As a further solution of the present invention: a support spring is arranged between the upper shell and the lower shell, a limiting slot is arranged through the upper shell and the lower shell, a limiting strip is fixedly arranged between the limiting part and the blocking part, and the limiting strip is adapted to be installed in the limiting slot.

[0010] As a further solution of the present invention: a limiting sleeve is fixedly arranged on the roof plate of the carriage, the limiting sleeve is arranged corresponding to the blocking part, and the diameter of the inner cavity of the limiting sleeve is larger than the diameter of the blocking part, and a temperature sensor is fixedly arranged on the outer wall of the limiting sleeve.

[0011] As a further solution of the present invention: a give-way cylinder is fixedly arranged at the bottom of the limit sleeve, the bottom of the give-way cylinder passes through the roof of the carriage and extends into the carriage, the diameter of the inner cavity of the give-way cylinder is larger than the diameter of the driving rod, and the depth of the inner cavity of the give-way cylinder is larger than the length of the driving rod.

[0012] As a further solution of the present invention: a curved groove is arranged on the outer wall of the driving rod, a driving pin is fixedly arranged on the inner wall of the giving way cylinder, and the driving pin is adapted to be slidably installed in the curved groove.

[0013] As a further solution of the present invention: the upper connecting plate and the lower connecting plate are arranged in parallel and in the same direction, and the length of the upper connecting plate is greater than the length of the lower connecting plate.

[0014] As a further solution of the present invention: sliding frames are respectively arranged at the edges of the ends of the first sound insulation board and the second sound insulation board away from the control assembly, sliding blocks are respectively and slidably installed in the sliding frames, guide rods are slidably penetrated through the sliding blocks, and the upper and lower ends of the guide rods are respectively fixedly connected to the cover body and the carriage roof plate.

[0015] As a further solution of the present invention: the shaft rod and the driving rod drive the first sound insulation board and the second sound insulation board to be arranged at intervals, so that the through holes at different heights are arranged in a cross pattern, and the shaft rod and the driving rod also drive the first sound insulation board and the second sound insulation board to be mutually attached to the sound insulation backing plate, so that the through holes at different heights are arranged in a staggered pattern.

[0016] As a further solution of the present invention: the width of the through hole is smaller than the interval distance between two adjacent through holes.

[0017] Advantages of the present invention:

[0018] (1) By arranging the control assembly, the electric lifting rod pushes the shaft rod up and down. During the up and down movement of the shaft rod, the driving rod will drive the shaft rod to rotate synchronously. During the rotational lifting process of the shaft rod, by means of the sliding fit between the limiting rollers and the corresponding limiting grooves, the upper connecting plate and the lower connecting plate will respectively drive the first sound insulation board and the second sound insulation board to perform horizontal and vertical movements, so that the first sound insulation board and the second sound insulation board are arranged in an alternating pattern or mutually attached, thereby enabling the interior of the cover body to be flexibly switched between the heat dissipation state and the sound insulation state according to the actual situation, with a wide application range and strong applicability.

[0019] (2) When the first sound insulation board and the second sound insulation board are arranged at intervals, there are certain distances between the first sound insulation board and the second sound insulation board and between the second sound insulation board and the sound insulation backing plate, thus forming a cavity structure for air circulation. Combined with the cross arrangement of the through holes at different heights, after the gas enters the interior of the cover body through the heat dissipation holes at the top of the cover body, it can smoothly flow between the first sound insulation board and the second sound insulation board along the through holes, thereby greatly improving the air circulation inside the cover body, and then effectively dissipating the heat of the cover body and effectively reducing the temperature inside the cover body.

[0020] (3) When the first sound insulation board and the second sound insulation board are mutually attached above the sound insulation backing plate, at this time, the through holes at different heights are arranged in a staggered pattern. At the same time, since the width of the through hole is smaller than the interval distance between two adjacent through holes, the through holes on the sound insulation backing plate and the second sound insulation board can be completely blocked and closed, thereby separating and forming a plurality of closed chambers, preventing air flow, greatly hindering the transmission of sound waves and heat, greatly improving the sound insulation effect, and at the same time being able to insulate heat for the carriage and avoid the influence of the external temperature on the interior of the carriage. Description of the drawings

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the internal structure of the cover body in the present invention.

[0024] Figure 3 It is a schematic diagram of the structure of the control component in the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the shaft rod in the present invention.

[0026] Figure 5 It is a schematic diagram of the structures of the upper housing and the lower housing in the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the relief cylinder in the present invention.

[0028] Figure 7 It is a schematic diagram of the structures of the first sound insulation board and the second sound insulation board in the present invention.

[0029] Figure 8 It is a schematic diagram of the structure of the present invention in a heat dissipation state.

[0030] Figure 9 It is a schematic diagram of the structure of the present invention in a sound insulation state

[0031] In the figure: 1. Cover body; 101. Heat dissipation holes; 102. Extended housing; 2. Carriage roof panel; 3. Sound insulation cushion plate; 4. First sound insulation board; 401. Through holes; 402. First limiting grooves; 403. Sliding frames; 404. Sliding blocks; 405. Guide rods; 5. Second sound insulation board; 501. Second limiting grooves; 6. Control component; 601. Electric lifting rod; 602. Shaft rod; 6021. Rotating connection part; 6022. Limiting part; 6023. Blocking part; 6024. Limiting card strips; 603. Upper housing; 6031. Upper connecting plate; 6032. First limiting rollers; 604. Lower housing; 6041. Lower connecting plate; 6042. Second limiting rollers; 6043. Fitting grooves; 6033. Limiting card slots; 605. Support springs; 606. Driving rods; 6061. Curved grooves; 607. Limiting sleeves; 6071. Temperature sensors; 608. Relief cylinder; 6081. Driving pins. Specific embodiments

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. 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.

[0033] Please refer to Figure 1 and Figure 2 As shown, the present invention relates to a roof sound insulation cover for a high-speed rail carriage, which includes a cover body 1. The cover body 1 is fixedly installed on the carriage roof plate 2. A sound insulation backing plate 3 is fixedly arranged at the upper end of the carriage roof plate 2. A first sound insulation board 4 and a second sound insulation board 5 are arranged at intervals from top to bottom inside the cover body 1. A heat dissipation hole 101 penetrates through the upper end of the cover body 1. An extension housing 102 is arranged on one side of the cover body 1. A control assembly 6 is arranged inside the extension housing 102. The control assembly 6 is in driving cooperation with the first sound insulation board 4 and the second sound insulation board 5 respectively.

[0034] Specifically, the sound insulation backing plate 3, the first sound insulation board 4, and the second sound insulation board 5 are all multi-layer structures. The upper and lower ends are panels that provide a supporting function, and a foaming material is filled in the middle of the panels to form a sound insulation layer. Of course, in the actual application process, a layer of sound insulation felt or high-density fiberboard can be selected to be added between the panel and the sound insulation layer to improve the sound insulation effect. The selection of sound insulation materials and the setting of the sound insulation layer structure have been widely used in the market at present and are known in the prior art, so no more details will be described here.

[0035] It should be noted that the heat dissipation holes 101 in this embodiment are symmetrically arranged on both sides of the upper end of the cover body 1, so as to leave enough space in the center of the upper end of the cover body 1 for installing a pantograph (not shown in the figure).

[0036] Such as Figure 3 、 Figure 5 and Figure 7As shown, the control component 6 includes an electric lifting rod 601, a shaft rod 602, and a driving rod 606. The electric lifting rod 601 is fixedly installed at the upper end of the extension housing 102. The output end of the electric lifting rod 601 is rotationally engaged with the top end of the shaft rod 602. An upper housing 603 is installed and limited on the shaft rod 602. A lower housing 604 is also movably installed on the shaft rod 602. One side of the upper housing 603 extends to form an upper connecting plate 6031. A first limiting roller 6032 is rotatably installed at the bottom of the upper connecting plate 6031. A first limiting groove 402 is horizontally arranged on the surface of the first sound insulation board 4. The first limiting roller 6032 is slidably installed in the first limiting groove 402 in a matching manner. One side of the lower housing 604 extends to form a lower connecting plate 6041. A second limiting roller 6042 is rotatably installed at the bottom of the lower connecting plate 6041. A second limiting groove 501 is horizontally arranged on the surface of the second sound insulation board 5. The first limiting roller 6032 is slidably installed in the second limiting groove 501 in a matching manner. The driving rod 606 is fixedly connected to the bottom of the shaft rod 602. Through holes 401 are arranged through the first sound insulation board 4, the second sound insulation board 5, and the sound insulation backing plate 3.

[0037] Specifically, by setting the control component 6, the electric lifting rod 601 pushes the shaft rod 602 up and down. During the up and down movement of the shaft rod 602, the driving rod 606 will drive the shaft rod 602 to rotate synchronously. During the rotational lifting process of the shaft rod 602, by using the sliding fit between the limiting rollers and the corresponding limiting grooves, the upper connecting plate 6031 and the lower connecting plate 6041 will drive the first sound insulation board 4 and the second sound insulation board 5 to move horizontally and vertically respectively, so that the first sound insulation board 4 and the second sound insulation board 5 are arranged in an alternating manner or are mutually attached, thereby enabling the interior of the housing 1 to be flexibly switched between a heat dissipation state and a sound insulation state according to the actual situation, with a wide application range and strong applicability.

[0038] As Figure 8 and Figure 9 shown, the shaft rod 602 and the driving rod 606 drive the first sound insulation board 4 and the second sound insulation board 5 to be arranged at intervals, so that the through holes 401 at different heights are arranged in a cross pattern. The shaft rod 602 and the driving rod 606 will also drive the first sound insulation board 4 and the second sound insulation board 5 to be mutually attached to the sound insulation backing plate 3, so that the through holes 401 at different heights are arranged in a staggered pattern.

[0039] Furthermore, the width of the through hole 401 is smaller than the interval distance between two adjacent through holes 401.

[0040] Specifically, as Figure 8As shown, when the first sound insulation board 4 and the second sound insulation board 5 are arranged at intervals, there is a certain distance between the first sound insulation board 4 and the second sound insulation board 5, and between the second sound insulation board 5 and the sound insulation backing plate 3, thus forming a cavity structure for air circulation. Coupled with the cross-arrangement of the through holes 401 at different heights, after the gas enters the interior of the cover 1 through the heat dissipation holes 101 at the top of the cover 1, it can smoothly flow between the first sound insulation board 4 and the second sound insulation board 5 along the through holes 401, thereby greatly improving the air circulation inside the cover 1, and then effectively dissipating the heat of the cover 1 and effectively reducing the temperature inside the cover 1.

[0041] As Figure 9 shown, when the first sound insulation board 4 and the second sound insulation board 5 are mutually attached above the sound insulation backing plate 3, at this time, the through holes 401 at different heights are arranged in a staggered manner. At the same time, since the width of the through holes 401 is smaller than the interval distance between two adjacent through holes 401, the through holes 401 on the sound insulation backing plate 3 and the second sound insulation board 5 can be completely blocked and closed, thereby separating and forming a plurality of closed chambers, preventing air flow, greatly hindering the transmission of sound waves and heat, greatly improving the sound insulation effect, and at the same time being able to insulate and heat the carriage, avoiding the influence of the external temperature on the interior of the carriage.

[0042] As Figure 4 shown, a rotating connection part 6021 is provided at the top end of the shaft rod 602. The output end of the electric lifting rod 601 is rotationally matched with the rotating connection part 6021. A limiting part 6022 is provided on the shaft rod 602. The upper shell 603 is limited and installed in the limiting part 6022. A blocking part 6023 is provided at the bottom of the shaft rod 602. A matching groove 6043 is provided at the bottom of the lower shell 604. The blocking part 6023 is movably installed in the matching groove 6043.

[0043] As Figure 5 shown, a support spring 605 is provided between the upper shell 603 and the lower shell 604. Limiting card slots 6033 are penetrated through both the upper shell 603 and the lower shell 604. A limiting card strip 6024 is fixedly provided between the limiting part 6022 and the blocking part 6023. The limiting card strip 6024 is adaptively installed in the limiting card slot 6033.

[0044] Specifically, by setting the shaft rod 602, when the output end of the electric lifting rod 601 pushes the shaft rod 602 to displace, the limiting part 6022 and the blocking part 6023 will drive the upper shell 603 and the lower shell 604 to move synchronously, so that the first sound insulation board 4 and the second sound insulation board 5 can be lifted and moved synchronously. When the driving rod 606 drives the shaft rod 602 to rotate, by means of the limiting cooperation between the limiting card slot 6033 and the limiting card strip 6024, the shaft rod 602 will drive the upper shell 603 and the lower shell 604 to rotate synchronously, so that the upper connecting plate 6031 and the lower connecting plate 6041 can rotate synchronously.

[0045] like Figure 7 As shown, the upper connecting plate 6031 and the lower connecting plate 6041 are arranged in parallel and in the same direction, and the length of the upper connecting plate 6031 is greater than the length of the lower connecting plate 6041.

[0046] Specifically, when the upper connecting plate 6031 and the lower connecting plate 6041 rotate at the same angle at the same time, since the length of the upper connecting plate 6031 is greater than that of the lower connecting plate 6041, at this time, the distance of horizontal displacement of the first sound insulation board 4 driven by the upper connecting plate 6031 through the first limiting roller 6032 and the distance of horizontal displacement of the second sound insulation board 5 driven by the lower connecting plate 6041 through the second limiting roller 6042 will also deviate, so that the first sound insulation board 4 is horizontally displaced relative to the second sound insulation board 5, and then the through holes 401 can be gradually adjusted from the cross arrangement to the staggered arrangement, and vice versa.

[0047] like Figure 3 As shown, a limiting sleeve 607 is fixedly provided on the carriage roof 2 , the limiting sleeve 607 is provided corresponding to the blocking portion 6023 , and the diameter of the inner cavity of the limiting sleeve 607 is larger than the diameter of the blocking portion 6023 , and a temperature sensor 6071 is fixedly provided on the outer wall of the limiting sleeve 607 .

[0048] Furthermore, a clearance cylinder 608 is fixedly arranged at the bottom of the limiting sleeve 607, and the bottom of the clearance cylinder 608 passes through the car roof 2 and extends into the car. The diameter of the inner cavity of the clearance cylinder 608 is greater than the diameter of the driving rod 606, and the depth of the inner cavity of the clearance cylinder 608 is greater than the length of the driving rod 606.

[0049] Specifically, in the initial state, the first sound insulation board 4 and the second sound insulation board 5 are spaced apart, and the upper shell 603 also maintains a certain distance from the lower shell 604, and the support spring 605 presses the lower shell 604 downward, so that the blocking portion 6023 abuts against the matching groove 6043. When the upper shell 603 and the lower shell 604 move downward along with the shaft 602 until the second sound insulation board 5 presses against the sound insulation pad 3, the second sound insulation board 5 and the lower shell 604 will no longer move up and down, and the first sound insulation board 4 and the upper shell 603 will continue to move downward. At this time, the support spring 605 will be gradually compressed and deformed, and the limiting sleeve 607 can provide sufficient activity space for the blocking portion 6023 that continues to move downward, and the giving way cylinder 608 can provide sufficient activity space for the driving rod 606 that continues to move downward, so that the upper shell 603 is gradually pressed down to approach the lower shell 604 until the first sound insulation board 4 presses against the second sound insulation board 5.

[0050] More specifically, by setting a temperature sensor 6071 to detect the temperature inside the cover body 1 in real time, when the temperature inside the cover body 1 is higher than a set threshold, the background system will send a control signal to the electric lifting rod 601 to control the first sound insulation board 4 and the second sound insulation board 5 to be spaced apart, and the inside of the cover body 1 is in a heat dissipation state. When the temperature inside the cover body 1 drops to a specified temperature, the electric lifting rod 601 will control the first sound insulation board 4 and the second sound insulation board 5 to be close together again, and the inside of the cover body 1 is in a sound insulation state, so that the cover body 1 can automatically switch between the heat dissipation mode and the sound insulation mode according to the internal temperature, and the degree of intelligence is high.

[0051] like Figure 4 and Figure 6 As shown, a curved groove 6061 is provided on the outer wall of the driving rod 606 , and a driving pin 6081 is fixedly provided on the inner wall of the giving way cylinder 608 , and the driving pin 6081 is adapted to be slidably installed in the curved groove 6061 .

[0052] Specifically, by setting the curved groove 6061 and the driving pin 6081, when the shaft rod 602 and the driving rod 606 move downward, the driving rod 606 will drive the shaft rod 602 to rotate by utilizing the sliding cooperation between the curved groove 6061 and the driving pin 6081, so that the shaft rod 602 can rotate smoothly during the lifting process.

[0053] like Figure 7 As shown, a sliding frame 403 is extended from the edge of one end of the first sound insulation board 4 and the second sound insulation board 5 away from the control assembly 6, and a sliding block 404 is slidably installed in the sliding frame 403. A guide rod 405 is slidably penetrated in the sliding block 404, and the upper and lower ends of the guide rod 405 are fixedly connected to the cover body 1 and the car roof 2 respectively.

[0054] Specifically, by providing the sliding frame 403 and the sliding block 404, when the first sound insulation board 4 and the second sound insulation board 5 move vertically, the sliding block 404 will slide along the guide rod 405, so as to limit and guide the vertical movement process of the two. When the first sound insulation board 4 and the second sound insulation board 5 move horizontally, the sliding block 404 will slide along the sliding frame 403, so as to constrain and limit the lateral movement process of the two, so as to ensure the stability of the movement process and make the horizontal movement and the vertical movement process not interfere with each other.

[0055] The working principle of the present invention is as follows: Figures 1 - 9As shown, during use, the temperature sensor 6071 is used to detect the temperature inside the cover 1 in real time. When the temperature inside the cover 1 is higher than the set threshold, the background system will send a control signal to the electric lifting rod 601 to control the first sound insulation board 4 and the second sound insulation board 5 to be arranged at intervals. At this time, there is a certain distance between the first sound insulation board 4 and the second sound insulation board 5, and between the second sound insulation board 5 and the sound insulation backing plate 3, thus forming a cavity structure for air circulation. Coupled with the cross-arrangement of the through holes 401 at different heights, after the gas enters the inside of the cover 1 through the heat dissipation holes 101 at the top of the cover 1, it can smoothly flow between the first sound insulation board 4 and the second sound insulation board 5 along the through holes 401, thereby greatly improving the gas circulation inside the cover 1, and then effectively dissipating the heat of the cover 1 and effectively reducing the temperature of the cover 1. At this time, the inside of the cover 1 is in a heat dissipation state. When the temperature inside the cover 1 drops to the specified temperature, the electric lifting rod 601 will control the first sound insulation board 4 and the second sound insulation board 5 to be arranged in a fitting manner again. At this time, the through holes 401 at different heights are arranged in a staggered manner. At the same time, since the width of the through holes 401 is smaller than the interval distance between adjacent through holes 401, the through holes 401 on the sound insulation backing plate 3 and the second sound insulation board 5 can be completely blocked and closed, thereby separating and forming a plurality of closed chambers, preventing air flow, greatly hindering the transfer of heat and sound waves, greatly improving the sound insulation effect, and at the same time being able to insulate and heat the carriage, avoiding the influence of the external temperature on the inside of the carriage. At this time, the inside of the cover 1 is in a sound insulation state, enabling the cover 1 to automatically switch between the heat dissipation mode and the sound insulation mode according to the internal temperature.

[0056] The above has described an embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A roof sound insulation cover for a high-speed rail carriage, comprising a cover body (1), and the cover body (1) is fixedly installed on the carriage roof plate (2), characterized in that, A sound insulation backing plate (3) is fixedly arranged at the upper end of the carriage roof plate (2). A first sound insulation board (4) and a second sound insulation board (5) are arranged at intervals from top to bottom inside the cover body (1). A heat dissipation hole (101) is arranged through the upper end of the cover body (1). An extension housing (102) is arranged on one side of the cover body (1). A control component (6) is arranged inside the extension housing (102). The control component (6) is in transmission cooperation with the first sound insulation board (4) and the second sound insulation board (5) respectively; The control component (6) includes an electric lifting rod (601), a shaft rod (602) and a driving rod (606). The electric lifting rod (601) is fixedly installed at the upper end of the extension housing (102). The output end of the electric lifting rod (601) is rotationally matched with the top end of the shaft rod (602). An upper housing (603) is installed on the shaft rod (602) in a limiting manner. A lower housing (604) is also movably installed on the shaft rod (602). An upper connecting plate (6031) extends from one side of the upper housing (603). A first limiting roller (6032) is rotatably installed at the bottom of the upper connecting plate (6031). A first limiting groove (402) is horizontally arranged on the surface of the first sound insulation board (4). The first limiting roller (6032) is adaptively and slidably installed in the first limiting groove (402). A lower connecting plate (6041) extends from one side of the lower housing (604). A second limiting roller (6042) is rotatably installed at the bottom of the lower connecting plate (6041). A second limiting groove (501) is horizontally arranged on the surface of the second sound insulation board (5). The first limiting roller (6032) is adaptively and slidably installed in the second limiting groove (501). The driving rod (606) is fixedly connected to the bottom of the shaft rod (602). Through holes (401) are arranged through the first sound insulation board (4), the second sound insulation board (5) and the sound insulation backing plate (3).

2. The overhead sound insulation cover for high-speed rail carriages according to claim 1, characterized in that, A rotational connection part (6021) is arranged at the top end of the shaft rod (602). The output end of the electric lifting rod (601) is rotationally matched with the rotational connection part (6021). A limiting part (6022) is arranged on the shaft rod (602). The upper housing (603) is installed in the limiting part (6022) in a limiting manner. A blocking part (6023) is arranged at the bottom of the shaft rod (602). A matching groove (6043) is arranged at the bottom of the lower housing (604). The blocking part (6023) is movably installed in the matching groove (6043).

3. The overhead sound insulation cover for a high-speed rail carriage according to claim 2, characterized in that, A support spring (605) is arranged between the upper housing (603) and the lower housing (604). Limiting card slots (6033) are arranged through the upper housing (603) and the lower housing (604). A limiting card strip (6024) is fixedly arranged between the limiting part (6022) and the blocking part (6023). The limiting card strip (6024) is adaptively installed in the limiting card slots (6033).

4. The overhead sound insulation cover for a high-speed rail carriage according to claim 2, characterized in that, A limiting sleeve (607) is fixedly arranged on the carriage roof (2), the limiting sleeve (607) is arranged corresponding to the blocking portion (6023), the diameter of the inner cavity of the limiting sleeve (607) is larger than the diameter of the blocking portion (6023), and a temperature sensor (6071) is fixedly arranged on the outer wall of the limiting sleeve (607).

5. The roof sound insulation cover for a high-speed rail carriage according to claim 4, characterized in that A clearance cylinder (608) is fixedly arranged at the bottom of the limiting sleeve (607); the bottom of the clearance cylinder (608) passes through the carriage roof (2) and extends into the carriage; the diameter of the inner cavity of the clearance cylinder (608) is greater than the diameter of the driving rod (606); and the depth of the inner cavity of the clearance cylinder (608) is greater than the length of the driving rod (606).

6. The overhead sound insulation cover for a high-speed rail carriage according to claim 5, characterized in that, The outer wall of the driving rod (606) is provided with a curved groove (6061), and the inner wall of the giving way cylinder (608) is fixedly provided with a driving pin (6081), and the driving pin (6081) is adapted to be slidably installed in the curved groove (6061).

7. The roof sound insulation cover for a high-speed rail carriage according to claim 1, characterized in that, The upper connecting plate (6031) and the lower connecting plate (6041) are arranged in parallel and in the same direction, and the length of the upper connecting plate (6031) is greater than the length of the lower connecting plate (6041).

8. The roof sound insulation cover for a high-speed rail carriage according to claim 1, characterized in that, A sliding frame (403) is provided on the edge of one end of the first sound insulation board (4) and the second sound insulation board (5) away from the control assembly (6), and a sliding block (404) is slidably mounted in the sliding frame (403). A guide rod (405) is slidably penetrated in the sliding block (404), and the upper and lower ends of the guide rod (405) are respectively fixedly connected to the cover body (1) and the compartment roof (2).

9. The roof sound insulation cover for a high-speed rail carriage according to claim 1, characterized in that, The shaft rod (602) and the driving rod (606) drive the first sound insulation board (4) and the second sound insulation board (5) to be arranged at intervals, so that the through holes (401) at different heights are arranged in a cross-arrangement. The shaft rod (602) and the driving rod (606) also drive the first sound insulation board (4) and the second sound insulation board (5) to be attached to the sound insulation pad (3), so that the through holes (401) at different heights are arranged in a staggered manner.

10. The roof sound insulation cover for a high-speed rail carriage according to claim 9, characterized in that, The width of the through hole (401) is smaller than the spacing distance between two adjacent through holes (401).

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