Through-passage side guard plate bonding auxiliary tool

Abstract

The utility model discloses a kind of through passage side fender bonding auxiliary tool, it is related to fixture technical field, to solve the inconvenience of fixing after rubber baffle and alloy plate are bonded in prior art, effect is poorer.The utility model includes the bracket of being provided with containing groove, the containing groove can contain alloy plate and rubber baffle, the bracket is connected with clamping device by adjusting device, the clamping device is set in the containing groove, the clamping device includes clamping plate, the adjusting device can adjust the abutting pressure of clamping plate and alloy plate and rubber baffle bonding place, the clamping plate includes the arc structure part of cooperation with the bending arc of rubber baffle.The utility model uses bracket, clamping device and adjusting device etc., can be clamped to rubber baffle and alloy plate bonding site, also can cooperate with the arc structure of rubber baffle, under the premise of simplifying rubber baffle and alloy plate bonding fixed mode, improve the connecting effect between rubber baffle and alloy plate.

Description

Technical Field

[0001] This utility model belongs to the field of fixture technology, specifically relating to an auxiliary tooling for bonding side guard plates of through channels. Background Technology

[0002] The side panels of a connecting passageway are components installed between subway train cars to connect two trains and allow passengers to pass through. Its main components include rubber baffles, side slide A, side slide B, a middle plate, and connecting rods. The design of the connecting passageway allows passengers to easily move from one car to another. Furthermore, the sides of the connecting passageway are sealed with rubber baffles to prevent foreign objects from falling in.

[0003] The side panel body is made of alloy. Typically, rubber baffles are glued to the junctions of the side panel and the transition plate / shelf for sealing. To ensure a good seal, after applying adhesive, clips or other methods are needed to firmly bond the rubber baffle and alloy plate together. However, the joint between the side panel and the rubber baffle has a curved shape. While this shape allows for better clamping and fixing of straight structures, gaps exist at the joint, resulting in poor fixation. Furthermore, multiple clips are needed sequentially at the joint, making the fixation method inconvenient. The clips are also prone to loosening during fixing, causing relative displacement of the rubber baffle and alloy plate, affecting the quality of the finished product. Utility Model Content

[0004] This utility model discloses an auxiliary tooling for bonding side guard plates of a through passage, which aims to solve the technical problems of inconvenient and poor fixing effect after bonding rubber baffles and alloy plates in the above-mentioned prior art.

[0005] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0006] A tooling for bonding a side panel of a through passageway includes a bracket with a receiving groove for accommodating an alloy plate and a rubber baffle. The bracket is connected to a clamping device via an adjusting device. The clamping device is disposed in the receiving groove and includes a clamping plate. The adjusting device can adjust the contact pressure between the clamping plate and the bonding points of the alloy plate and the rubber baffle. The clamping plate includes an arc-shaped structure that matches the curvature of the rubber baffle.

[0007] After adopting this technical solution, the component after the alloy plate and rubber baffle are bonded together can be initially accommodated by the receiving groove on the bracket, and then the component after the alloy plate and rubber baffle are bonded together by the clamping device in the receiving groove, so that the rubber baffle and alloy plate are bonded more firmly.

[0008] The arc-shaped structure on the clamping plate can better fit with the rubber baffle, making the rubber baffle more firmly bonded to the alloy plate under the action of the adjustment device and the clamping plate, thus improving the bonding effect. At the same time, the device uses a bracket to clamp and fix the alloy plate and the rubber baffle, making it more convenient to operate.

[0009] The adjusting device includes several bolts, and the bracket is provided with a limiting nut that cooperates with each bolt. After the several bolts are connected to the limiting nuts, they pass through the bracket and abut against the clamping plate. At least one of the bolts is connected to the clamping plate through a connecting device.

[0010] After adopting this technical solution, the setting of the limit nut can quickly position the bolt, so that the bolt contacts the clamping plate vertically after passing through the positioning nut, making the positional relationship between the bolt and the clamping plate accurate. By changing the position between the bolt and the limit nut, the pressure of the bolt on the clamping plate is changed, and the pressure is relatively stable. This changes the pressure between the alloy plate and the rubber baffle that are in contact with the clamping plate, thereby improving the stability of the device during use.

[0011] One of the bolts is connected to the clamping plate via a connecting device, and the clamping plate is connected to the bracket via bolts, which facilitates the positioning of the clamping plate. There is no need to search for the clamping plate separately during use, making it more convenient to use.

[0012] The connecting device includes a connecting plate connected to the clamping plate, and a positioning nut is provided on the connecting plate, with one of the bolts connected to the positioning nut.

[0013] With this technical solution, the clamping plate is connected to the bracket through the positioning nut, the limit nut and the bolt, so that the device does not need to be searched for separately when in use, which makes it more convenient to use.

[0014] The connecting device includes a connecting plate connected to the clamping plate, and a bearing is provided on the connecting plate. The bearing is rotatably connected to at least one of the bolts.

[0015] With this technical solution, a bearing is installed on the connecting plate, which is rotatably connected to the bolt. This connects the clamping plate to the bracket, eliminating the need to search for the clamping plate separately during use, making it simpler to use. Furthermore, when adjusting the pressure at the bonding point of the alloy plate and rubber baffle using the bolt, the rotational movement of the bolt is directly converted into the linear movement of the clamping plate, eliminating the need to manually squeeze the clamping plate to move it up and down in the receiving groove until it contacts the bonding area of ​​the alloy plate and rubber baffle. This adjustment method is simpler, and the clamping plate contacts the bonding area of ​​the alloy plate and rubber baffle almost in a straight line, resulting in more precise positioning and improved compression effect on the bonding area.

[0016] The bracket has a U-shaped structure, and a base plate is connected to the bottom of the bracket. The base plate and the bracket form a receiving groove for accommodating the alloy plate and the rubber baffle. An opening is also provided on the base plate.

[0017] By adopting this technical solution, the base plate allows the device to clamp the bonding area between the alloy plate and the rubber baffle on any flat structure, such as a tabletop or the ground, thus improving the device's practicality. The opening reduces the amount of material used in the base plate, thereby lowering the production cost of the device.

[0018] The bracket is provided with a limiting part, which includes a sliding groove vertically disposed on two opposite side walls of the bracket. Each sliding groove is connected to a sliding member, and the sliding member is connected to the clamping plate.

[0019] After adopting this technical solution, the setting of sliding parts and grooves further improves the accuracy and stability of the clamping plate's position adjustment during use, so that the position of the clamping plate can be better aligned with the bonding parts of the alloy plate and rubber baffle, thereby improving the squeezing and fixing effect.

[0020] A telescopic spring is provided in the slide groove, and the telescopic spring is disposed between the slide groove and the sliding member.

[0021] After adopting this technical solution, the position of the clamping plate can be further limited by the telescopic spring, making the position of the clamping plate more accurate. The contraction force of the telescopic spring can also initially provide squeezing pressure on the alloy plate and the rubber baffle. The clamping plate can further adjust the pressure of the clamping plate on the adhesion of the rubber baffle and the alloy plate by the bolts, thereby improving the squeezing effect on the adhesion part of the rubber baffle and the alloy plate and making the adhesion effect between the rubber baffle and the alloy plate better.

[0022] The arc-shaped structure includes an arc-shaped groove disposed on the clamping plate. The curvature of the arc-shaped groove matches the curvature of the rubber baffle. An elastic pad that matches the alloy plate and the rubber baffle is disposed in the arc-shaped groove.

[0023] After adopting this technical solution, an elastic pad is added under the clamping plate to prevent the clamping plate from causing damage to the rubber baffle of the side guard plate due to excessive force during clamping. Therefore, an elastic pad is added and the elastic pad is glued to the clamping plate.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0025] (1) By using brackets, clamping devices and adjusting devices, the joint between the rubber baffle and the alloy plate can be clamped, and it can also be used in conjunction with the arc structure of the rubber baffle to improve the connection effect between the rubber baffle and the alloy plate while simplifying the bonding and fixing method of the rubber baffle and the alloy plate.

[0026] (2) Bolts, limit nuts, connecting devices, etc. are used to create a connection between the clamping plate and the bracket. This makes it more convenient to use as there is no need to search for the clamping plate separately. At the same time, the pressure between the clamping plate and the alloy plate and the rubber baffle can be adjusted by the bolts and limit nuts, which has high adjustment accuracy and good pressure adjustment effect.

[0027] (3) By using a connecting plate and bearings, the rotational motion of the bolt is converted into the vertical linear motion of the clamping plate. This makes the position adjustment of the clamping plate more accurate. When the position between the rubber baffle and the alloy plate is relatively fixed, the position of the clamping plate relative to the rubber baffle and the alloy plate is also relatively accurate, which improves the clamping and pressurizing effect on the bonded part and makes the connection between the rubber baffle and the alloy plate more stable.

[0028] (4) The base plate can be used to fit any structure with a flat surface to clamp and pressurize the rubber baffle and the bonding part of the alloy plate, which improves the practicality of the device.

[0029] (5) Using grooves or other means to further limit the position of the clamping plate, making the position of the clamping plate more accurate and the clamping effect better.

[0030] (6) By using telescopic springs, initial pressure can be provided to the bonding parts of the rubber baffle and the alloy plate to prevent the alloy plate and the rubber baffle from shifting, thereby improving the accuracy of the bonding position of the rubber baffle and the alloy plate. Attached Figure Description

[0031] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0032] Figure 1 This is a three-dimensional structural schematic diagram of an auxiliary tooling for bonding side guard plates of a through passageway according to this application;

[0033] Figure 2 This is a front view structural schematic diagram of an auxiliary tooling for bonding side guard plates of a through passageway according to this application;

[0034] Figure 3 A schematic diagram showing the positions and structures of the bearing, slide, and telescopic spring;

[0035] Figure 4 This is a schematic cross-sectional view of the bearing, slide, and telescopic spring.

[0036] Figure Labels

[0037] 1-Base plate, 2-Clamping plate, 201-Arc-shaped structure, 3-Connecting plate, 4-Positioning nut, 5-Bolt, 6-Limiting nut, 7-Bracket, 701-Slide groove, 702-Sliding part, 703-Telescopic spring, 8-Bearing, 9-Nylon pad. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] The following is combined with Figures 1-4 This utility model will be described in detail.

[0041] Example 1

[0042] A kind of auxiliary tooling for bonding side guards of through passageways, such as Figures 1-2 As shown, the bracket 7 includes a receiving groove that can accommodate an alloy plate and a rubber baffle. The bracket 7 is connected to a clamping device via an adjustment device. The clamping device is disposed in the receiving groove and includes a clamping plate 2. The adjustment device can adjust the contact pressure between the clamping plate 2 and the bonding points of the alloy plate and the rubber baffle. The clamping plate 2 includes an arc-shaped structural part 201 that matches the curvature of the rubber baffle.

[0043] In this embodiment, both the bracket 7 and the clamping plate 2 are made of stainless steel. Devices made of stainless steel are corrosion-resistant, have high hardness, are durable, and have a long service life.

[0044] In this embodiment, the arc-shaped structure 201 includes an arc-shaped groove disposed on the clamping plate 2. The curvature of the arc-shaped groove matches the curvature of the rubber baffle. An elastic pad 9 is disposed in the arc-shaped groove to cooperate with the alloy plate and the rubber baffle.

[0045] In this embodiment, the clamping plate 2 has a length of 50cm, a width of 5cm, and a thickness of 8cm. The distance from the bottom of the arc-shaped groove to the bottom of the clamping plate 2 is 4cm.

[0046] In this embodiment, the arc shape of the arc groove is equal to the bending arc shape of the rubber baffle. Each rubber baffle has arc-shaped ends, with an arc length of 15.85cm and a radius of R180cm.

[0047] In this embodiment, the elastic device 9 is a nylon pad, which is bonded and fixed to the arc-shaped groove. A nylon pad is added below the clamping plate 2 to prevent excessive force during clamping from causing damage to the side guard plate rubber baffle.

[0048] The bracket 7 can initially accommodate the component after the alloy plate and rubber baffle are bonded together. Then, the clamping device in the accommodating groove can press the bonded joint of the alloy plate and rubber baffle together to make the bond of the rubber baffle and alloy plate more secure.

[0049] The arc-shaped structure 201 on the clamping plate 2 can better fit with the rubber baffle, so that the rubber baffle is more firmly attached to the alloy plate under the action of the adjustment device and the clamping plate 2, thus improving the bonding effect. At the same time, the device uses the bracket 7 to clamp and fix the alloy plate and the rubber baffle, which makes the operation more convenient.

[0050] In this embodiment, the adjusting device includes several bolts 5, and the bracket 7 is provided with a limiting nut 6 that cooperates with each bolt 5. After the several bolts 5 are connected to the limiting nut 6, they pass through the bracket 7 and abut against the clamping plate 2. At least one of the bolts 5 is connected to the clamping plate 2 through a connecting device.

[0051] In this embodiment, five bolts 5 are provided, and the diameter of each bolt 5 is 1.6 cm.

[0052] In this embodiment, the bolt 5 is threadedly connected to the limiting nut 6.

[0053] In this embodiment, five limiting nuts 6 are provided. The limiting nuts 6 and the bracket 7 are integrally formed by welding, and the five limiting nuts 6 are evenly arranged above the bracket 7.

[0054] In this embodiment, the bracket 7 is provided with 5 through holes that cooperate with the bolt 5.

[0055] In this embodiment, the five bolts 5 located at the very center are connected to the clamping plate via a connecting device.

[0056] The setting of the limiting nut 6 can quickly position the bolt 5, so that the bolt 5 contacts the clamping plate 2 vertically after passing through the positioning nut 4, making the positional relationship between the bolt 5 and the clamping plate 2 accurate. By changing the position between the bolt 5 and the limiting nut 6, the pressure of the bolt 5 on the clamping plate 2 is changed, and the pressure is relatively stable. This changes the pressure between the alloy plate and the rubber baffle that are in contact with the clamping plate 2, thereby improving the stability of the device during use.

[0057] One of the bolts 5 is connected to the clamping plate 2 through a connecting device, and the clamping plate 2 is connected to the bracket 7 through the bolt 5, which facilitates the positioning of the clamping plate 2. When using it, there is no need to find the clamping plate 2 separately, which makes it more convenient to use.

[0058] In this embodiment, the connecting device includes a connecting plate 3 connected to the clamping plate 2, and a positioning nut 4 is provided on the connecting plate 3, wherein one of the bolts 5 is connected to the positioning nut 4.

[0059] In this embodiment, the connecting plate 3 and the clamping plate 2 are integrally formed by welding.

[0060] In this embodiment, the positioning nut 4 is welded to the connecting plate 3.

[0061] The clamping plate 2 is connected to the bracket 7 through the positioning nut 4, the limiting nut 6, and the bolt 5, so that the device does not need to be searched for separately when in use, making it more convenient to use.

[0062] In this embodiment, as Figure 1-2 As shown, the bracket 7 has a U-shaped structure, and the bottom of the bracket 7 is connected to a base plate 1. The base plate 1 and the bracket 7 form a receiving groove for accommodating the alloy plate and the rubber baffle. The base plate 1 is also provided with an opening.

[0063] In this embodiment, the clamping plate 2 is also a U-shaped structure, such as... Figure 1-3 As shown.

[0064] In this embodiment, the bottom of opposite sides of the bracket 7 is provided with first threaded holes, and the base plate 1 is provided with two first threaded holes, including a second threaded hole. The second threaded hole is a countersunk hole. Screws pass through the second threaded hole and the first threaded hole in sequence to detachably connect the base plate 1 and the bracket 7. When the bracket 7, the base plate 1, or the clamping plate 2 deforms, the corresponding component can be replaced, saving costs. In other embodiments, the base plate 1 and the bracket 7 can be integrally formed, which simplifies the production process.

[0065] The base plate 1 allows the device to clamp the bonding area between the alloy plate and the rubber baffle on any flat structure, such as a tabletop or the ground, thus improving its practicality. The opening reduces the amount of material used in the base plate 1, thereby lowering the production cost of the device.

[0066] The specific method of using this utility model is as follows:

[0067] Reference Figures 1-2 When using this device, first apply glue to the bonding area between the alloy plate and the rubber baffle to bond them together. After bonding, align the bonding area between the alloy plate and the rubber baffle with the clamping plate 2 and insert it into the receiving groove formed by the bracket 7 and the base plate 1, placing it below the clamping plate 2. Then, the user adjusts the central bolt 5, rotates the bolt 5, and squeezes the clamping plate 2 by hand, causing the clamping plate 2 to move downward in the receiving groove, gradually approaching the bonding area between the alloy plate and the rubber baffle until the arc-shaped groove of the clamping plate 2 fits against the surface of the rubber baffle, thus squeezing the bonding area between the rubber baffle and the alloy plate.

[0068] Then the user adjusts the other bolts 5 so that they contact the clamping plate 2, further pressurizing the clamping plate 2, and finally clamping the adhesive parts of the rubber baffle and the alloy plate, making the adhesive parts of the rubber baffle and the alloy plate more stable.

[0069] Example 2

[0070] This embodiment is basically the same as Embodiment 1, except that: in this embodiment, as shown in the example... Figure 3-4 As shown, the connecting device includes a connecting plate 3 connected to the clamping plate 2, and a bearing 8 is provided on the connecting plate 3. The bearing 8 is rotatably connected to at least one of the bolts 5.

[0071] In this embodiment, the bearing 8 is welded to the connecting plate 3. The bearing 8 includes an inner ring and an outer ring. The outer ring is fixedly connected to the connecting plate 3 by welding, and the inner ring is connected to the bolt 5 by a key. In this embodiment, the inner ring of the bearing 8 rotates with the bolt 5, while the outer ring does not rotate. The bearing 8 can be any bearing capable of performing the above functions, such as a ball bearing.

[0072] In this embodiment, the bottom of the bolt 5 connected to the bearing 8 is a smooth rod.

[0073] A bearing 8 is provided on the connecting plate 3, and the bearing 8 is rotatably connected to the bolt 5, so that the clamping plate 2 is connected to the bracket 7. When using it, there is no need to find the clamping plate 2 separately, which makes it simple to use. At the same time, when adjusting the pressure on the bonding part of the alloy plate and the rubber baffle through the bolt 5, the rotational movement of the bolt 5 is directly converted into the linear movement of the clamping plate 2, without having to squeeze the clamping plate 2 by hand to move the clamping plate 2 up and down in the receiving groove until it contacts the bonding part of the alloy plate and the rubber baffle. This adjustment method is simpler, and the clamping plate 2 contacts the bonding part of the alloy plate and the rubber baffle in an almost straight line, which is also more precise in position and can improve the squeezing effect on the bonding part.

[0074] Example 3

[0075] This embodiment is basically the same as embodiment 2, except that: in this embodiment, as shown in the example Figure 3-4 As shown, the bracket 7 is provided with a limiting part, which includes a sliding groove 701 vertically disposed on two opposite side walls of the bracket 7. Each sliding groove 701 is connected to a sliding member 702, and the sliding member 702 is connected to the clamping plate 2.

[0076] In this embodiment, the slide groove 701 and the bracket 7 are integrally formed.

[0077] In this embodiment, the sliding member 702 and the clamping plate 2 are integrally formed by welding.

[0078] The sliding component 702 and the sliding groove 701 further improve the accuracy and stability of the position adjustment of the clamping plate 2 during use, so that the position of the clamping plate 2 can be better aligned with the bonding parts of the alloy plate and the rubber baffle, thereby improving the squeezing and fixing effect.

[0079] Example 4

[0080] This embodiment is basically the same as embodiment 3, except that: in this embodiment, as shown in the example Figure 3-4 As shown, a telescopic spring 703 is provided in the slide groove 701, and the telescopic spring 703 is disposed between the slide groove 701 and the sliding member 702.

[0081] In this embodiment, one end of the telescopic spring 703 is welded to the slide groove 701, and the other end is welded to the bottom surface of the sliding member 702.

[0082] In this embodiment, the telescopic spring 703 is disposed on the side of the slide groove 701 near the bottom plate 1.

[0083] In this embodiment, the telescopic spring 703 is initially in a contracted state.

[0084] The position of the clamping plate 2 can be further defined by the telescopic spring 703, making the position of the clamping plate 2 more accurate. The contraction force of the telescopic spring 703 can also initially provide squeezing pressure on the alloy plate and the rubber baffle. The pressure of the clamping plate 2 on the adhesion of the rubber baffle and the alloy plate can be further adjusted by the bolt 5, which improves the squeezing effect on the adhesion part of the rubber baffle and the alloy plate, and makes the adhesion between the rubber baffle and the alloy plate better.

[0085] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An auxiliary tooling for bonding side panels of a through passageway, characterized in that: The bracket (7) includes a receiving groove that can accommodate an alloy plate and a rubber baffle. The bracket (7) is connected to a clamping device via an adjusting device. The clamping device is located in the receiving groove and includes a clamping plate (2). The adjusting device can adjust the contact pressure between the clamping plate (2) and the bonding point of the alloy plate and the rubber baffle. The clamping plate (2) includes an arc-shaped structure (201) that matches the curvature of the rubber baffle.

2. The auxiliary tooling for bonding side guard plates of a through passageway according to claim 1, characterized in that: The adjusting device includes several bolts (5), and the bracket (7) is provided with a limiting nut (6) that cooperates with each bolt (5). After the several bolts (5) are connected to the limiting nut (6), they pass through the bracket (7) and abut against the clamping plate (2). At least one of the bolts (5) is connected to the clamping plate (2) through a connecting device.

3. The auxiliary tooling for bonding the side guard plate of the through passage according to claim 2, characterized in that: The connecting device includes a connecting plate (3) connected to the clamping plate (2), and a positioning nut (4) is provided on the connecting plate (3), wherein one of the bolts (5) is connected to the positioning nut (4).

4. The auxiliary tooling for bonding side guard plates of a through passageway according to claim 2, characterized in that: The connecting device includes a connecting plate (3) connected to the clamping plate (2), and a bearing (8) is provided on the connecting plate (3), the bearing (8) being rotatably connected to at least one of the bolts (5).

5. The auxiliary tooling for bonding side panels of a through passageway according to any one of claims 1-4, characterized in that: The bracket (7) has a U-shaped structure. The bottom of the bracket (7) is connected to a base plate (1). The base plate (1) and the bracket (7) form a receiving groove for accommodating the alloy plate and the rubber baffle. An opening is also provided on the base plate (1).

6. The auxiliary tooling for bonding side guard plates of a through passageway according to claim 5, characterized in that: The bracket (7) is provided with a limiting part, which includes a sliding groove (701) vertically disposed on two opposite side walls of the bracket (7). Each sliding groove (701) is connected to a sliding member (702), and the sliding member (702) is connected to the clamping plate (2).

7. The auxiliary tooling for bonding side guard plates of a through passageway according to claim 6, characterized in that: A telescopic spring (703) is provided in the slide groove (701), and the telescopic spring (703) is disposed between the slide groove (701) and the sliding member (702).

8. The auxiliary tooling for bonding side panels of a through passageway according to any one of claims 1-4, characterized in that: The arc-shaped structure (201) includes an arc-shaped groove disposed on the clamping plate (2), the curvature of the arc-shaped groove matching the curvature of the rubber baffle, and an elastic pad (9) disposed in the arc-shaped groove to cooperate with the alloy plate and the rubber baffle.

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