Sanding protection tool for train window

Abstract

The utility model relates to the technical field of protection tools, and discloses a sanding protection tool for train windows, which comprises a metal frame, the metal frame is composed of a metal frame outer frame and metal frame supporting rods which are transversely and longitudinally arranged in the metal frame outer frame, one surface of the metal frame is covered with a flexible material skin, and the surface is the front surface of the tool. The periphery of the flexible material skin wraps the back face of the outer frame of the metal frame, the back face of the outer frame of the metal frame is fixedly pressed through a plurality of rivets with gaskets, and one side of an L-shaped sealing strip is installed on the metal frame through a plurality of rivets or screws along the inner side face of the outer frame of the metal frame by means of the sanding protection tool for the car window. The other side of the metal frame is lapped on the back face of the outer frame of the metal frame, and fixing and clamping devices are evenly distributed on the periphery of the outer frame of the metal frame. According to the utility model, the tool structure can resist long-term impact of steel shots, and is long in service life; sealing between the tool and a vehicle body is excellent, and steel shots are difficult to intrude into the vehicle body; and the tool is convenient and fast to mount and dismount.

Description

Technical Field

[0001] This utility model relates to the field of protective tooling technology, and in particular to a sandblasting protective tooling for train windows. Background Technology

[0002] After years of operation, some domestically produced trains are returned to the manufacturing plant for modification and upgrades, requiring repainting of the train bodies. Before repainting, processes such as sandblasting and shot blasting are generally used to remove old paint, rust, and dirt from the exterior surface of the train. At this time, the windows and doors on both sides of the train body (the holes left after the original windows and doors have been removed) need to be protected with appropriate tooling to prevent high-impact steel shot from hitting the interior of the train body and damaging the interior facilities, causing unnecessary losses.

[0003] Currently, the following drawbacks exist in car window sandblasting protective fixtures: 1. Defects in the fixture's structural design result in its inability to withstand long-term impact from steel shot, leading to a short service life. Some car window sandblasting protective fixtures mainly consist of a metal frame, steel rings welded to the outer edge of the frame, a flexible material skin, and an outermost steel ring (the skin is sandwiched between the outermost steel ring and the aforementioned steel ring welded to the frame, with the two steel rings and the skin connected by screws or rivets). With this type of car window sandblasting protective fixture, the outermost steel ring and the fasteners on it remain exposed to the impact range of the steel shot during sandblasting and shot blasting, resulting in an unsatisfactory service life. 2. Poor sealing between the fixture and the vehicle body causes steel shot to leak into the vehicle from the joint between the fixture and the vehicle body, making subsequent cleaning work arduous. Some car windows use sandblasting protective fixtures, and the area where they meet the car body has a ring of rivet heads (rivets are used to secure the flexible skin). This creates an uneven surface where the fixture meets the car body, allowing high-energy steel shot to penetrate almost anywhere and seep into the car's interior through the gaps in the surface. 3. The fixture is time-consuming and labor-intensive to install, resulting in uneven stress and making it difficult to ensure a tight fit between all parts of the fixture and the car body. Many car windows use sandblasting protective fixtures that are tightened by ropes inside the car during installation. This is time-consuming and labor-intensive, and can easily lead to uneven stress on the fixture, resulting in some areas not fitting firmly to the car body. Utility Model Content

[0004] The purpose of this invention is to provide a sandblasting protective tool for train windows that offers good sealing and is easy and quick to install.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sandblasting protective fixture for train windows, comprising a metal frame, wherein the metal frame is composed of an outer metal frame edge and internal horizontally and vertically arranged metal frame support rods, one side of the metal frame is covered with a flexible material skin, which is the front of the fixture, the flexible material skin wraps around the back of the outer metal frame edge, and is fixed and pressed tightly on the back of the outer metal frame edge with several rivets with washers, the sandblasting protective fixture for train windows, along the inner side of the outer metal frame edge, uses several rivets or screws to install one side of an L-shaped sealing strip on the metal frame, and the other side rests on the back of the outer metal frame edge, the outer metal frame edge is distributed with fixing clamping devices around its perimeter, and is fixed to the metal frame support rods with screws or direct welding, the pressure head of the fixing clamping device and the L-shaped sealing strip are set on both sides of the steel plate of the car body.

[0006] Furthermore, both the outer frame of the metal frame and the metal frame support rod are welded together using hollow square or rectangular tubes.

[0007] Furthermore, the outer frame of the metal frame is 2-3cm larger than the window opening.

[0008] Furthermore, the flexible material skin is made of polyurethane board or the like, with a thickness of 1-8mm.

[0009] Furthermore, the L-shaped sealing strip is made of silicone or similar materials.

[0010] Furthermore, the fixing clamping device is a quick clamp or rope fixing.

[0011] As an alternative, the L-shaped sealing strip can also be made into a U-shape depending on the improvement requirements.

[0012] This utility model has the following beneficial effects:

[0013] 1. In this utility model, the reasonable structural design enables it to withstand long-term impact from steel shot, significantly extending its service life and reducing replacement frequency and maintenance costs. The unique installation method allows the L-shaped sealing strip to fit tightly against the car body steel plate to form a sealing surface. Combined with the strong clamping force provided by the fixing and clamping device, it achieves an excellent sealing effect between the tooling and the car body, effectively preventing steel shot from intruding into the car body and ensuring the safety of equipment and the environment inside the carriage. At the same time, the installer can complete the extension, flipping, pressing and clamping operations of the tooling inside the carriage. The entire installation and disassembly process is convenient and quick, greatly improving work efficiency and providing efficient and reliable protection for sandblasting operations on train windows. Attached Figure Description

[0014] Figure 1 This is a front structural diagram of a sandblasting protective tool for train windows proposed in this utility model.

[0015] Figure 2 This is a schematic diagram of the back structure of a sandblasting protective tool for train windows proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the AA-section cross-sectional structure of a sandblasting protective tool for train windows proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the fixing and clamping device for a sandblasting protective tool for train windows proposed in this utility model.

[0018] Figure 5 This is a top view of a fixing and clamping device for a sandblasting protective tool for train windows proposed in this utility model.

[0019] Legend:

[0020] 1. Metal frame; 101. Outer frame of metal frame; 102. Support rod of metal frame; 2. Flexible material skin; 3. L-shaped sealing strip; 4. Fixing clamping device; 5. Rivets. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-5One embodiment of this utility model is a sandblasting protective fixture for train windows, comprising a metal frame 1. The metal frame 1 serves to support and fix other components. During installation, the metal frame 1 is the main structure that contacts the outer side of the car body steel plate. It is pressed onto the car body steel plate at the edge of the window by flipping and pressing it. The car body steel plate is the base object for the installation of the fixture, providing a surface for the fixture to be installed and fixed. The inner and outer sides of the vehicle body steel plate at the edge of the window contact the pressure head of the metal frame 1 and the fixing clamping device 4 respectively, bear the pressure applied by the tooling, cooperate with each component of the tooling to achieve stable installation of the tooling on the vehicle body, provide basic position support for subsequent sealing and fixing, and ensure that the tooling can withstand the external force of steel shot impact after installation and maintain the stability of the overall shape. The metal frame 1 is composed of the outer frame 101 of the metal frame and the internal horizontal and vertical metal frame support rods 102. One side of the metal frame 1 is covered with a flexible material skin 2, which is the front of the tooling. The flexible material skin 2 wraps around the back of the outer frame 101 of the metal frame and is fixed and pressed on the back of the outer frame 101 of the metal frame with several rivets 5 with washers. The window is protected by sandblasting tooling. Along the inner side of the outer frame 101 of the metal frame, several rivets 5 or screws are used to install one side of the L-shaped sealing strip 3 on the metal frame 1. The main function of the L-shaped sealing strip 3 is to form a sealing protection (when it encounters the internal support rod of the metal frame 1, a corresponding notch is cut on the L-shaped sealing strip 3). When the metal frame 1 is pressed against the outside of the vehicle body steel plate, the L-shaped sealing strip 3, with its high elasticity and wear-resistant rubber material properties, tightly adheres to the surface of the vehicle body steel plate, fills the tiny gaps between the tooling and the vehicle body, and forms a continuous sealing surface around the edge of the window, effectively preventing steel shot from intruding into the interior of the vehicle during the sandblasting operation. The other side rests on the back of the outer frame 101 of the metal frame. The outer frame 101 of the metal frame is surrounded by fixing clamping devices 4. The fixing clamping devices 4 adopt a lever-type mechanical structure. By pressing down the handle, the pressure head is driven to move downward and press against the inside of the vehicle body steel plate. Multiple fixing devices 4 work together to generate a strong clamping force using the mechanical lever principle, tightly connecting the metal frame 1 to the vehicle body steel plate, and fixing it to the metal frame support rod 102 with screws or direct welding. The pressure head of the fixing device 4 and the L-shaped sealing strip 3 are set on both sides of the vehicle body steel plate. The outer frame of the metal frame 101 and the metal frame support rod 102 are both made of hollow square tubes or rectangular tubes welded together. The outer frame of the metal frame 101 is 2-3cm larger than the window opening size. The flexible material skin 2 is made of polyurethane board with a thickness of 1-8mm. The L-shaped sealing strip 3 is made of silicone. The fixing device 4 is a quick clamp or rope fixation.

[0023] Specifically, when using this sandblasting protective fixture for train windows, the installer first operates from inside the train carriage, extending the entire fixture outward through the window. Once outside, the installer flips the metal frame 1 along the window's contour, precisely pressing it against the outer surface of the car body's steel plate at the window's edge. During this process, the installer must strictly control the fixture's position, observing and adjusting to ensure the fixture's center coincides with the window's center, thus ensuring the accuracy of subsequent sealing and fixing. Once the metal frame 1 is stably pressed against the outer surface of the car body's steel plate, the pre-installed L-shaped sealing strip 3 on the fixture adheres tightly to the steel plate due to the pressing force, forming a continuous and complete sealing surface around the window's edge. This L-shaped sealing strip 3 is made of highly elastic, wear-resistant rubber, effectively filling the tiny gaps between the fixture and the car body's steel plate, providing basic protection against steel shot intrusion into the carriage. The evenly distributed fixing clamps 4 on the fixture are then operated. The fixing clamping device 4 adopts a lever-type mechanical structure. When the installer presses down the handle of the fixing clamping device 4, its pressure head will move downwards until it is firmly pressed against the inner surface of the car body steel plate at the edge of the window. Multiple fixing clamping devices 4 apply pressure simultaneously, and the strong clamping force generated by the mechanical lever principle makes the metal frame 1 fit tightly against the car body steel plate, thereby firmly and stably installing the tooling on the car body. This ensures that the tooling can withstand the impact of steel shot without displacement or loosening during the sandblasting operation of the train window.

[0024] Working principle: When using this fixture, the installer extends it out of the window inside the train carriage, flips it over, and presses the fixture's frame against the outer side of the car body steel plate at the edge of the window. During installation, care should be taken to ensure that the fixture is as concentric as possible with the window. At this time, the L-shaped sealing strip 3 on the fixture fits against the car body steel plate to form a sealing surface. Finally, the installer presses down the fixing clamping devices 4 distributed on the fixture inside the carriage. The pressure head of the fixing clamping device 4 presses against the inner side of the car body steel plate at the edge of the window. In this way, the clamping force provided by the fixing clamping device 4 securely installs the fixture onto the car body.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sandblasting protective tool for train windows, comprising a metal frame (1), characterized in that: The metal frame (1) consists of an outer metal frame frame (101) and internal horizontal and vertical metal frame support rods (102). One side of the metal frame (1) is covered with a flexible material skin (2), which is the front of the tooling. The flexible material skin (2) wraps around the back of the outer metal frame frame (101) and is fixed and pressed on the back of the outer metal frame frame (101) with several rivets (5) with washers. The sandblasting protective tooling for the car window uses several rivets (5) or screws to install one side of the L-shaped sealing strip (3) on the metal frame (1) and the other side on the back of the outer metal frame frame (101). Fixing clamping devices (4) are distributed around the outer metal frame frame (101) and fixed to the metal frame support rods (102) with screws or direct welding.

2. The sandblasting protective tool for train windows according to claim 1, characterized in that: The outer frame (101) of the metal frame and the metal frame support rod (102) are both welded together using hollow square tubes or rectangular tubes.

3. The sandblasting protective fixture for train windows according to claim 1, characterized in that: The outer frame of the metal frame (101) is 2-3cm larger than the window opening.

4. The sandblasting protective tool for train windows according to claim 1, characterized in that: The flexible material skin (2) is made of polyurethane board with a thickness of 1-8mm.

5. The sandblasting protective tool for train windows according to claim 1, characterized in that: The L-shaped sealing strip (3) is made of silicone.

6. The sandblasting protective fixture for train windows according to claim 1, characterized in that: The fixing device (4) is a quick clamp or rope fixing.

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