Gas cylinder side arrangement device and frame assembly

Abstract

The utility model provides a gas cylinder side arrangement device and a frame assembly. The gas cylinder side arrangement device is used for fixing a gas cylinder on the side face of a frame of a transport vehicle and comprises two supports, the two supports are arranged at intervals in the length direction of the frame, each support comprises a first connecting plate and a second connecting plate which are arranged at an included angle, the first connecting plates are used for being detachably connected with the side face of the frame, and the second connecting plates are used for being detachably connected with the side face of the frame. The second connecting plate extends outwards relative to the frame and is used for being detachably connected with a flange plate at the end of the gas cylinder. The frame assembly comprises a frame, the gas cylinder and the gas cylinder side arrangement device.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle accessory technical field, especially a gas cylinder side device and frame assembly. BACKGROUND

[0002] With the diversification of heavy truck market demand, according to the actual requirement of vehicle to the endurance mileage, gas cylinder has multiple arrangement forms. At present, the most common gas cylinder arrangement form of domestic natural gas truck is placed in the rear part of the cab, and this arrangement form is relatively simple, does not need to change the chassis, and can reserve space by simply lengthening the wheelbase, which is fast, low in cost and widely used. Another arrangement method is to arrange single gas cylinder fixing device on both sides of the vehicle. The gas cylinder side design has the advantages of arranging multiple gas cylinders, increasing the endurance mileage, and the cab has more displacement space and higher safety. Secondly, more space is reserved for the front exploration of the cargo box, which is convenient for loading more goods.

[0003] The installation of the common side bottle group of the existing heavy truck is generally to first make an integral frame to install the gas cylinder, and then connect the frame with the two L-shaped beams or arc-shaped frames with the frame of the whole vehicle. Therefore, the fixing device has the problems of large space occupation, large weight, complex fixed parts and the like. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a gas cylinder side device to solve the technical problem of the large weight of the gas cylinder fixing device in the prior art.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: the gas cylinder side device comprises two supports arranged at intervals along the length direction of the frame, wherein the support comprises a first connecting plate and a second connecting plate arranged at an included angle, the first connecting plate is used to be detachably connected with the side surface of the frame, and the second connecting plate extends outward relative to the frame to be detachably connected with the flange plate at the end of the gas cylinder.

[0006] In one embodiment, the second connecting plates of the two supports are opposite and clamp the two ends of the gas cylinder in the axial direction therebetween.

[0007] In one embodiment, the first connecting plate is flat and adheres to the side surface of the frame; the side surface of the frame is provided with a plurality of through holes arranged at intervals along the length direction, and the first connecting plate is provided with connecting holes corresponding to the through holes to pass the fasteners to be detachably connected with the frame.

[0008] In one of the embodiments, the second connecting plate has an arc-shaped profile, including a first flat section, a middle arc-shaped section and a second flat section connected in sequence by circular arc transitions, the inner angle between the first flat section and the middle arc-shaped section is less than 180 degrees, and the inner angle between the second flat section and the middle arc-shaped section is less than 180 degrees; wherein the first flat section is connected with the first connecting plate, and the second flat section is used to be connected with the flange plate, in the height direction of the vehicle frame, the second flat section is lower than the first flat section.

[0009] In one of the embodiments, the first flat section is perpendicular to the side surface of the vehicle frame and connected with the first connecting plate by a circular arc transition; and the second flat section is parallel to the first flat section.

[0010] In one of the embodiments, the second connecting plate is provided with a plurality of hollow grooves, and the hollow grooves are in a runway shape.

[0011] In one of the embodiments, the bracket further comprises two opposite flanges, the two flanges are respectively folded from the two sides of the first connecting plate in the height direction of the vehicle frame, and the flanges are connected with the side of the second connecting plate adjacent to the second connecting plate.

[0012] In one of the embodiments, the bracket is an integral structure.

[0013] The utility model also provides a vehicle frame assembly, the vehicle frame assembly includes vehicle frame, gas cylinder and above-mentioned gas cylinder side placement device, wherein the gas cylinder is located on at least one side surface of the vehicle frame, the axial both ends of the gas cylinder are equipped with the flange plate respectively, two brackets are opposite with two flange plates respectively, the first connecting plate is detachable connection with the side surface of the vehicle frame, the second connecting plate is away from the vehicle frame and extends to the outside, and is detachable connection with the flange plate, so that the center horizontal axis of the gas cylinder is located below the vehicle frame.

[0014] In one of the embodiments, the top of the gas cylinder is not higher than the top of the vehicle frame.

[0015] In one of the embodiments, the end of the second connecting plate away from the vehicle frame is provided with an opening for exposing the valve assembly on the flange plate, and a plurality of connecting holes are provided around the opening on the second connecting plate to connect the second connecting plate to the flange plate by fasteners.

[0016] In one of the embodiments, the middle part of the flange plate is provided with a mounting hole, and the flange plate is also provided with a strip-shaped groove for mounting the damping member, the strip-shaped groove extends from the outer edge of the flange plate to the mounting hole, and the strip-shaped groove is communicated with the mounting hole; the flange plate is provided with a fixing hole extending along the plane where the flange plate is located, the fixing hole extends to the strip-shaped groove and is communicated with the strip-shaped groove; the fastener is clamped to the damping member through the fixing hole.

[0017] From the above technical solution, the gas cylinder side placement device of the utility model has at least the following advantages and positive effects:

[0018] This gas cylinder side-mounted device includes two brackets. These two brackets are positioned at opposite ends of the gas cylinder along its axial direction and are detachably connected to two flanges on the cylinder. This relative arrangement of the two brackets effectively prevents axial movement of the gas cylinder, thus securing it to the vehicle frame. Compared to conventional frame structures, this two-bracket gas cylinder fixing device effectively reduces the product's weight, meeting lightweight requirements. Furthermore, the overall structure is simple and installation is more convenient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a vehicle frame assembly according to an embodiment of the present invention from a first-view perspective.

[0020] Figure 2 This is a schematic diagram of a vehicle frame assembly according to an embodiment of the present invention from a second perspective.

[0021] Figure 3 yes Figure 1 The top view of the frame assembly shown.

[0022] Figure 4 yes Figure 1 The side view of the frame assembly shown.

[0023] Figure 5 This is a schematic diagram of the installation of two brackets in one embodiment of this utility model.

[0024] Figure 6 yes Figure 5 Side view of the bracket.

[0025] Figure 7 yes Figure 5 Top view of the support structure.

[0026] Figure 8 This is a schematic diagram of the connection between the bracket and the first flange in one embodiment of the present invention, wherein the gas cylinder body is hidden.

[0027] Figure 9 yes Figure 8 A magnified view of a portion of the image.

[0028] Figure 10 This is a schematic diagram of the connection between the bracket and the second flange in one embodiment of the present invention, wherein the gas cylinder body is hidden.

[0029] The annotations in the attached figures are explained as follows:

[0030] 1. Frame;

[0031] 2, cylinder; 20, cylinder body; 21, first flange plate; 211, mounting hole; 213, strip-shaped groove; 215, fixing hole; 22, second flange plate; 23, valve assembly; 24, control system;

[0032] 3, support; 31, first connecting plate; 310, first connecting hole; 32, second connecting plate; 321, opening; 322, second connecting hole; 323, hollow groove; 324, first flat section; 325, middle arc section; 326, second flat section; 33, flange; 331, clearance hole. DETAILED DESCRIPTION

[0033] While the present application can be susceptible to embodiment in different forms, only some of the specific embodiments are shown and described in detail in the drawings and the specification herein, it being understood that the specification is to be considered an exemplification of the principles of the application and is not intended to limit the application to that as set forth herein.

[0034] Thus, one feature that is indicated in the specification will be used to illustrate one feature of one embodiment of the application, and is not meant to imply that every embodiment of the application must have the illustrated feature. In addition, it should be noted that the specification describes many features. While certain features can be combined together to illustrate possible system designs, these features can also be used in other combinations not explicitly illustrated. Thus, unless otherwise noted, the illustrated combinations are not intended to be limiting.

[0035] In the embodiments shown in the drawings, the indications of direction, such as up, down, left, right, front, and rear, are used to explain the structure and movement of the various elements of the application are not absolute but relative. These indications are appropriate when the elements are in the positions shown in the drawings. If the positions of the elements change, then the indications of direction also change accordingly.

[0036] The present application relates to a vehicle frame assembly and cylinder side fixing device. The vehicle is generally a long-distance transport heavy truck, but also can be a special transport vehicle. And the vehicle cylinder applied to heavy truck mainly includes LNG (liquefied natural gas) cylinder, CNG (compressed natural gas) cylinder and 35MPa or 70MPa compressed hydrogen cylinder. The above-mentioned cylinder as a clean energy source can provide power for the vehicle.

[0037] In order to optimize the space layout of the vehicle and prolong the driving distance, the gas cylinder is usually fixed on the frame of the side of the vehicle head, that is, the side gas cylinder mode. And this mode generally uses a frame to fix the gas cylinder, and the frame is composed of at least two L-shaped frames arranged at a specific angle and spacing to adapt to the shape and size of the gas cylinder. Specifically, the frame body is composed of two oppositely spaced square tube longitudinal beams. The two square tube longitudinal beams are connected by a cross beam to enhance the lateral stability of the frame. The square tube longitudinal beam is provided with a support assembly. These support assemblies are used to support and fix the gas cylinder, including two vertically arranged L-shaped or arc-shaped brackets to match the shape of the gas cylinder.

[0038] Therefore, if the above conventional frame structure, the weight of the entire frame is expected to be more than 60 kg. But if the new design of the gas cylinder side placement device in the utility model is adopted, the total weight of the front and rear supports is only about 20 kg, which effectively reduces the self weight of the product and meets the requirement of lightweight, and the overall device structure is simple and convenient to install.

[0039] The embodiment also provides a frame assembly, which comprises a frame, a gas cylinder and the above-mentioned gas cylinder side placement device. Wherein the gas cylinder is located on at least one side of the frame, and the axial both ends of the gas cylinder are respectively provided with flanges, and the gas cylinder side placement device is connected with the flanges through the supports to fix the gas cylinder on the frame.

[0040] Please refer to Figures 1 to 4 The frame assembly in the embodiment comprises two gas cylinders 2, which are arranged on the two sides of the frame 1 along the width direction of the frame 1, that is, on the web of the frame 1. Each gas cylinder 2 is equipped with a corresponding side placement fixing device to be suspended and fixed on the side of the frame 1.

[0041] The gas cylinder 2 comprises a long cylindrical gas cylinder body 20 and a first flange 21 and a second flange 22 symmetrically arranged at the axial both ends of the gas cylinder body 20. Wherein the axial direction of the gas cylinder body 20 is parallel to the length direction of the frame 1.

[0042] In order to facilitate understanding, the length direction of the frame 1 in Figure 1 is indicated as the front-rear direction in the embodiment, and the width direction of the frame 1 is indicated as the left-right direction in the embodiment.

[0043] As shown in Figure 1 and Figure 2 , the first flange 21 located on the front side of the frame 1 can also be called a bottle head flange, and the second flange 22 located on the rear side of the frame 1 can also be called a bottle tail flange.

[0044] The first flange 21 and the second flange 22 are both flat plate structures, which can be detachably connected with the side placement fixing device. The specific structure of the above-mentioned flange will be described in the followingFigure 8 and Figure 10 described in the specification.

[0045] The first flange plate 21 is provided with a valve assembly 23 corresponding to the head of the gas cylinder 2.

[0046] The valve assembly 23 is a key component for realizing safe storage of gas, controlling gas flow, and realizing gas supply. The valve assembly 23 includes a valve body and a plurality of ports provided on the valve body, which include a gas inlet, a gas outlet, a control port, a relief port, and other functional ports for detection. The valve assembly 23 is in a hydraulic drive mode. The control end of the valve assembly 23 is connected to a hydraulic source through various hydraulic pipelines, and the liquid is delivered to the driving mechanism of the valve assembly 23 through the pipelines.

[0047] In order to realize accurate control, the valve assembly 23 is usually equipped with a control system 24. The control system 24 receives external signals and adjusts the output pressure or flow of the hydraulic source according to the signal instructions, so as to realize accurate control of the opening and closing state of the valve. Correspondingly, the second flange plate 22 is provided with a valve assembly 23 corresponding to the tail of the gas cylinder 2.

[0048] As shown in Figure 3 , the side fixing device includes two independent supports 3.

[0049] The two supports 3 are arranged at the front and rear ends of the gas cylinder 2 in the axial direction, and are detachably connected with the corresponding first flange plate 21 and second flange plate 22. In this way, the front and rear arrangement design of the two supports 3 can effectively prevent the gas cylinder 2 from moving forward and backward in the axial direction.

[0050] In addition, it should be noted that the above two supports 3 are independent, that is, there is no connecting member between the two supports 3, and there is no connection relationship. Compared with the existing way of connecting the two supports 3 through a cross beam, the weight is reduced.

[0051] In the embodiment, whether the support 3 is connected to the first flange plate 21 or the second flange plate 22, the structures of the two supports 3 are basically the same. During the installation of the fixing device, the two supports 3 located at the same side of the vehicle frame 1 are arranged in the length direction of the vehicle frame 1, and the directions of the flanges 33 of the two supports 3 can be consistent or arranged in a front-rear symmetrical manner.

[0052] As shown in the above embodiment, the side fixing device in the embodiment only includes two supports 3, that is, the stable fixation of the gas cylinder 2 can be realized; further, considering the installation requirements of gas cylinders of different sizes or weights, the side fixing device in other embodiments is not limited to two supports, and an additional third or fourth support can also be provided.

[0053] Please refer to Figure 5The bracket 3 comprises a first connecting plate 31 and a second connecting plate 32 connected at an angle.

[0054] The first connecting plate 31 is used to detachably connect with the side surface of the frame 1.

[0055] The first connecting plate 31 is rectangular and flat, so as to fit the side surface of the frame 1. The first connecting plate 31 is provided with a first connecting hole 310, so as to pass a fastener such as a bolt to detachably connect with the frame 1. The side surface of the frame 1 is provided with a plurality of through holes arranged at intervals along the length direction, which are matched with the first connecting hole 310, so that the first connecting plate 31 can freely select a corresponding through hole to fix the gas cylinder 2 according to the length of the gas cylinder 2.

[0056] The second connecting plate 32 extends outward relative to the frame 1, and is used to detachably connect with the flange plate at the end of the gas cylinder 2. On the same side surface of the frame 1, the second connecting plates 32 of the two brackets 3 are opposite to each other, so as to clamp the two ends of the gas cylinder 2 axially therebetween.

[0057] The second connecting plate 32 is provided with an opening 321 at the end away from the frame 1, so as to expose the valve assembly 23 on the flange plate, and is further provided with a plurality of second connecting holes 322 around the opening 321, so as to pass a fastener such as a bolt to be connected to the flange plate by the bolt.

[0058] In addition, a plurality of hollow grooves 323 are arranged at intervals on the second connecting plate 32, which are in the shape of a racetrack, and serve as weight-reducing holes.

[0059] Please refer to Figure 6 The second connecting plate 32 has an arc-shaped profile, comprising a first flat section 324, an intermediate arc-shaped section 325 and a second flat section 326 connected in sequence by circular arcs.

[0060] The first flat section 324 and the second flat section 326 are two linear sections with different lengths, and the intermediate arc-shaped section 325 is a circular arc transition section therebetween. The inner angle between the first flat section 324 and the intermediate arc-shaped section 325 is less than 180 degrees, and the inner angle between the second flat section 326 and the intermediate arc-shaped section 325 is also less than 180 degrees.

[0061] The above arc-shaped design can effectively disperse the pressure from all directions. Compared with the straight line or sharp edge of the common bracket 3, the arc-shaped profile can better resist external impact and internal pressure, and can more evenly distribute these forces and reduce the risk of local stress concentration. Therefore, the arc-shaped profile can provide better structural support for the gas cylinder 2.

[0062] In addition, the inner angle between the flat sections 324, 326 and the intermediate arc section 325 is less than 180 degrees. This arc transition design not only provides visual smoothness, but also helps to form a stress dispersion area inside the connecting plate, reduces structural damage caused by stress concentration, and enhances the overall strength of the connecting plate.

[0063] Specifically, the first flat section 324 is integrally bent and formed with the first connecting plate 31. The first flat section 324 extends perpendicularly to the side surface of the frame 1 and is connected to the first connecting plate 31 at an approximate 90-degree arc transition.

[0064] The second flat section 326 is used to detachably connect with the flange plate. The middle part of the second flat section 326 is provided with an opening 321 for exposing the valve assembly 23 on the flange plate.

[0065] The shape of the opening 321 can be a rectangular shape that matches the valve assembly 23 on the first flange plate 21, or a hexagonal shape that matches the valve assembly 23 on the second flange plate 22. The second flat section 326 is provided with a plurality of spaced second connecting holes 322 around the opening 321 for bolt insertion.

[0066] In the height direction of the frame 1, the second flat section 326 is lower than the first flat section 324. Figure 4 After installation, the central horizontal axis of the gas cylinder 2 connected with the second flat section 326 is below the frame 1, thus leaving space above the gas cylinder 2, preventing interference between the gas cylinder 2 and other components installed above the frame 1. More specifically, during installation, the top of the gas cylinder 2 is set to be no higher than the top of the frame 1, i.e., the top of the gas cylinder 2 can be lower than or flush with the top of the frame 1.

[0067] Please refer to Figure 7 The plane in which the second flat section 326, the intermediate arc section 325, and the first flat section 324 lie is the same plane, which extends perpendicularly to the side surface of the frame 1.

[0068] In combination with Figure 7 and Figure 5 The bracket 3 further comprises two opposite flanges 33.

[0069] The two flanges 33 are respectively formed by folding upward from the first connecting plate 31 along the two sides in the height direction of the frame 1, and the flanges 33 are connected to the side adjacent to the second connecting plate 32, so that the included angles between the planes in which they lie are each about 90 degrees. The flanges 33 function like reinforcing ribs, which can improve the strength of the structure of the bracket 3.

[0070] In the embodiment, the bracket 3 is an integral structure, i.e. the first connecting plate 31, the second connecting plate 32 and the flange 33 are integrally injection molded.

[0071] Please refer to Figures 8 to 10 In the drawings, the structure of the cylinder body 20 is hidden for the sake of clear seeing the connection relationship between the bracket 3 and the two flanges.

[0072] As shown in Figure 8 and Figure 9 In the installation, the second flat section 326 of the bracket 3 located at the front side of the frame 1 can be attached to the first flange 21. The first flange 21 is located in the gap between the two flanges 33.

[0073] The valve assembly 23 on the first flange 21 is exposed through the opening 321 forwardly, and the bolt is threaded through the second connecting hole 322 on the second flat section 326 and the first flange 21 to bolt the second flat section 326 to the first flange 21.

[0074] The first flange 21 is rectangular in shape, and a circular mounting hole 211 is formed in the middle. The diameter of the mounting hole 211 is matched with the diameter of the protruding end of the cylinder head of the cylinder 2, so that the first flange 21 can be sleeved on the cylinder head of the cylinder 2.

[0075] A strip-shaped groove 213 for mounting the damping member is also formed on the first flange 21. The width of the strip-shaped groove 213 is about 1mm, and the strip-shaped groove 213 extends from the outer edge of the first flange 21 to the mounting hole 211, and the strip-shaped groove 213 is communicated with the mounting hole 211.

[0076] Opposite sides of the first flange 21 are respectively provided with fixing holes 215. The fixing holes 215 extend along the plane of the first flange 21, and extend from the fixing holes 215 to the strip-shaped groove 213 and are vertically communicated with the strip-shaped groove 213. Two bolts or other fasteners are threaded in the fixing holes 215 to clamp the damping member in the strip-shaped groove 213 from both sides. The damping member provides a large friction force to prevent the cylinder 2 from rotating around its circumference.

[0077] In addition, the flange 33 of the bracket 3 is provided with a clearance hole 331 corresponding to the position of the fixing hole 215, so as to provide sufficient operation space for the installation and removal of the bolt threaded in the fixing hole 215.

[0078] As shown in Figure 10 The second flat section 326 of the bracket 3 located at the rear side of the frame 1 can be attached to the second flange 22. Different from the first flange 21, the second flange 22 faces away from the flange 33. The valve assembly 23 on the second flange 22 is exposed through the opening 321 rearwardly, and the bolt is threaded through the second connecting hole 322 and the second flange 22.

[0079] The second flange plate 22 is rectangular in shape, with a circular through hole in the middle, and a plurality of connecting holes for bolting with the support 3 are arranged around the through hole. In the present embodiment, the second flange plate 22 is not provided with a strip-shaped slot 213 for preventing circumferential rotation of the gas cylinder 2; however, in other embodiments, the second flange plate 22 can be provided with an anti-rotation slot or similar anti-rotation component.

[0080] While the present application has been described with reference to several exemplary embodiments, it is understood that the words that have been used are words of description and illustration, rather than words of limitation. As such, the above description is not intended to be exhaustive or to limit the application to the precise form disclosed. While the application has been described with reference to particular embodiments thereof, it is understood that the application is not limited thereto and extensions and modifications can be made thereto without departing from the spirit and scope of the following claims.

Claims

1. A cylinder side placement device for fixing a cylinder to the side of a vehicle frame of a transport vehicle, characterized by, The gas cylinder side placement device comprises: Two supports are arranged at intervals along the length direction of the vehicle frame, wherein the support comprises a first connecting plate and a second connecting plate arranged at an angle, the first connecting plate is used to detachably connect with the side of the vehicle frame, and the second connecting plate extends outward relative to the vehicle frame and is used to detachably connect with the flange plate at the end of the gas cylinder.

2. The gas cylinder side placement device according to claim 1, wherein The second connecting plates of the two supports are opposite and clamp the two ends of the gas cylinder in the axial direction.

3. The gas cylinder lateral placement device according to claim 1, wherein The first connecting plate is flat and is attached to the side of the vehicle frame; a plurality of through holes are arranged at intervals along the length direction of the side of the vehicle frame, and a connecting hole corresponding to the through hole is arranged on the first connecting plate to allow a fastener to pass through and detachably connect with the vehicle frame.

4. The gas cylinder lateral placement device according to claim 1, wherein The second connecting plate has an arc-shaped profile and comprises a first flat section, an intermediate arc-shaped section and a second flat section connected in sequence by circular arcs, the internal angle between the first flat section and the intermediate arc-shaped section is less than 180 degrees, and the internal angle between the second flat section and the intermediate arc-shaped section is less than 180 degrees. The first flat section is connected with the first connecting plate, and the second flat section is used to connect with the flange plate, and in the height direction of the vehicle frame, the second flat section is lower than the first flat section.

5. The gas cylinder side placement device according to claim 4, wherein The first flat section is perpendicular to the side of the vehicle frame and is connected with the first connecting plate by a circular arc transition; and the second flat section is parallel to the first flat section.

6. The gas cylinder side placement device according to claim 1, wherein The second connecting plate is provided with a plurality of hollow grooves, and the hollow grooves are in the shape of a racetrack.

7. The gas cylinder side placement device according to claim 1, wherein The support further comprises two opposite flanges, and the two flanges are respectively formed by folding the two sides of the first connecting plate in the height direction of the vehicle frame, and the flanges are connected with one side of the second connecting plate adjacent to the second connecting plate.

8. The gas cylinder side placement device according to claim 7, characterized by The support is an integral structure.

9. A frame assembly characterized by, The vehicle frame, the gas cylinder and the gas cylinder side placement device according to any one of claims 1 to 8 are provided. The gas cylinder is arranged on at least one side of the vehicle frame, the two ends of the gas cylinder in the axial direction are respectively provided with flange plates, the two supports are respectively opposite to the two flange plates, the first connecting plate is detachably connected with the side of the vehicle frame, the second connecting plate extends outward away from the vehicle frame and is detachably connected with the flange plate, so that the central horizontal axis of the gas cylinder is located below the vehicle frame.

10. The frame assembly of claim 9, wherein, The top of the gas cylinder is not higher than the top of the vehicle frame.

11. The frame assembly of claim 9, wherein, The end of the second connecting plate away from the vehicle frame is provided with an opening for exposing a valve assembly on the flange plate, and a plurality of connecting holes surrounding the opening are arranged on the second connecting plate to allow a fastener to pass through and connect the second connecting plate to the flange plate.

12. The frame assembly of claim 11, wherein, The middle part of the flange plate is provided with a mounting hole, and the flange plate is further provided with a strip-shaped groove for mounting a damping member, the strip-shaped groove extends from the outer edge of the flange plate to the mounting hole, and the strip-shaped groove is in communication with the mounting hole; the flange plate is provided with a fixing hole extending along the plane of the flange plate, the fixing hole extends to the strip-shaped groove and is in communication with the strip-shaped groove; and a fastener is arranged in the fixing hole to clamp the damping member.

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