Convenient-to-use auxiliary device for mounting tire assembly

Abstract

The invention discloses a convenient-to-use auxiliary device for mounting a tire assembly, and relates to the technical field of automobile assembly tools. The device comprises a bottom plate, an adjusting plate and a bearing plate, the bottom plate is connected with a transverse plate through a supporting rod, the transverse plate is provided with an adjusting box, a worm in the box is meshed with a turbine at the upper end of a lifting screw, and the adjusting plate can be driven to ascend and descend along a guide rod by rotating a lifting knob; the adjusting plate is connected with the bearing plate through the lower adjusting screw rod and the adjusting block, the bearing plate is provided with the upper adjusting screw rod, and front-back and left-right horizontal fine adjustment of the tire assembly can be achieved by rotating the lower knob and the upper knob; a V-shaped limiting rod above the bearing plate is matched with a rotatable auxiliary limiting assembly, and tire assemblies of different sizes can be fixed in a self-adaptive mode. In addition, the bottom plate is provided with self-locking universal wheels and straight pulleys, moving and fixing are convenient, each operation component is provided with an anti-skid structure, and the use safety is improved. The device does not need continuous manual lifting, automatic lifting and precise positioning of the tire assembly can be achieved, the labor intensity is reduced, and the mounting efficiency and precision are improved.

Description

Technical Field

[0001] This invention belongs to the field of automotive assembly tool technology, and in particular relates to an easy-to-use auxiliary device for tire assembly installation. Background Technology

[0002] In automotive repair or tire replacement, the installation of the tire assembly (including the tire and rim) is a common and important operation. Currently, when installing a tire assembly, the mechanic usually needs to manually lift the tire assembly to the height corresponding to the rim to be installed, then manually adjust the position of the tire assembly so that the bolt holes on the tire align with the bolts on the rim, and finally tighten the bolts to complete the installation. However, this traditional installation method has obvious drawbacks: on the one hand, the tire assembly is heavy, and manual lifting is not only labor-intensive, but also prone to fatigue of maintenance personnel and increase the risk of occupational injury during long-term operation; on the other hand, when manually adjusting the position of the tire assembly, it is difficult to accurately control the alignment accuracy of the tire bolt holes and wheel bolts, which is prone to deviation and requires multiple adjustments, resulting in low installation efficiency. Moreover, if the alignment deviation is large, it may also cause damage to the bolts or bolt holes during the tightening process, affecting the installation quality. Therefore, developing an auxiliary device for tire assembly installation that can reduce labor intensity and improve installation efficiency and accuracy has become an urgent problem to be solved in this field. Summary of the Invention

[0003] The purpose of this invention is to provide an easy-to-use auxiliary device for tire assembly installation. This device can achieve automatic lifting and precise positioning of the tire assembly without the need for continuous manual lifting, thereby reducing labor intensity and improving installation efficiency and accuracy.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an easy-to-use auxiliary device for tire assembly installation, comprising a base plate, an adjusting plate, and a receiving plate. Support rods are fixed to both ends of one side of the base plate, and a horizontal plate is fixed to the upper ends of the two support rods. An adjusting box is provided on the upper surface of the horizontal plate, and a worm gear is rotatably connected inside the adjusting box. The smooth end of the worm gear passes through the adjusting box and is fixed with a lifting knob. Guide rods are fixed to both sides of the horizontal plate, and the lower ends of the guide rods are fixedly connected to the base plate. One side of the adjusting plate is provided with a guide block that is slidably connected to the guide rod. The guide block has a Z-shaped plate structure, and a lifting screw is threadedly connected to the middle of the upper surface of the guide block. The upper end of the lifting screw extends through the horizontal plate into the adjusting box and is fixed with a turbine matching the worm gear. A downward groove is opened on the upper surface of the adjusting plate, and a lower adjusting screw is rotatably connected in the downward groove. One end of the lower adjusting screw extends through the adjusting plate to the outside and is fixed with a lower knob. An adjusting block matching the downward groove is rotatably connected to the periphery of the lower adjusting screw. The lower surface of the receiving plate is provided with an upper sliding groove that matches the adjusting block. An upper adjusting screw is rotatably connected in the upper sliding groove. One end of the upper adjusting screw extends through the receiving plate to the outside and is fixed with an upper knob. The peripheral side of the upper adjusting screw is threadedly engaged with the screw hole on the upper part of the adjusting block. A limiting rod is inclinedly provided above the receiving plate. The limiting rod is a "V" tubular structure. A support plate is fixed to the lower arc surface of the limiting rod. The lower surface of the support plate is fixedly connected to the receiving plate. An auxiliary limiting component is rotatably connected between the two support plates located at the opening of the limiting rod. The auxiliary limiting assembly includes two limiting plates that are rotatably connected to the support plates. A plurality of arc-shaped limiting strips that match the tire assembly are fixed between the two limiting plates. The arc-shaped limiting strips are fixed circumferentially between the two support plates.

[0005] In one embodiment, the lower surface of the base plate is provided with two straight pulleys at the front end and two omnidirectional wheels with self-locking mechanisms at the rear end.

[0006] In one embodiment, the adjusting block has a cuboid structure, and the shape and size of the adjusting block are adapted to the sliding groove. The adjusting block and the lower adjusting screw are threaded together, and the adjusting block and the sliding groove are slidably engaged.

[0007] In one embodiment, the shape and size of the adjusting block are adapted to the upper sliding groove, the adjusting block is threadedly engaged with the upper adjusting screw, and the adjusting block is slidably engaged with the upper sliding groove.

[0008] In one embodiment, the surface of the arc-shaped limiting strip is provided with anti-slip texture, which is a mesh or stripe structure.

[0009] In one embodiment, push handles are fixed on both sides of the upper end of the horizontal plate, and the outer surface of the push handles is covered with an anti-slip rubber layer with concave and convex anti-slip textures; the outer surfaces of the lifting knob, the lower knob and the upper knob are all provided with anti-slip textures.

[0010] In one embodiment, elastic pads for securing the tire assembly are provided on both sides of the limiting rod.

[0011] In one embodiment, the limiting plate of the auxiliary limiting assembly can rotate about its connection point with the support plate to accommodate tire assemblies of different sizes.

[0012] The present invention has the following beneficial effects: 1. Significantly Reduced Labor Intensity: Traditional installation requires manual lifting of heavy tire assemblies, which easily leads to fatigue and work-related injuries. This device, through a worm gear-turbine driven lifting structure, can automatically support and adjust the height of the tire assembly, eliminating the need for manual lifting. Position adjustment can be completed simply by operating a knob, significantly reducing the physical burden on maintenance personnel and lowering the risk of work-related injuries such as muscle strain.

[0013] 2. Significantly Improved Installation Efficiency: Manual tire position adjustment often requires multiple attempts due to alignment deviations, resulting in significant time consumption. This device features dual adjustment functions: coarse height adjustment and fine horizontal adjustment. First, the tire height is quickly brought close to the mounting surface using the lifting knob. Then, precise fine adjustments in the forward / backward and left / right directions are achieved using the lower and upper knobs respectively. This quickly aligns the tire bolt holes with the wheel bolts, reducing repeated adjustments and significantly shortening the installation time per cycle, thus improving overall work efficiency.

[0014] 3. Improved Installation Accuracy and Quality: Manual alignment is prone to deviations, which may damage bolts or bolt holes. This device's adjustment structure achieves precise displacement through threaded transmission, and the "V"-shaped limit rod and auxiliary limit components can stably fix the tire, preventing tire wobbling during adjustment, ensuring precise alignment of bolt holes and bolts, reducing installation deviations, lowering the probability of bolt and bolt hole damage, guaranteeing tire installation quality, and avoiding safety hazards caused by improper installation.

[0015] 4. High adaptability and wide range of applications: The limiting plate of the auxiliary limiting component can rotate around the hinge point and can adaptively adjust the angle according to different tire assemblies. With the elastic pad of the "V" shaped limiting rod, it can stably fix tire assemblies of various specifications. There is no need to equip different models or tire sizes with separate devices, reducing equipment investment costs. It is suitable for tire installation operations in various scenarios such as auto repair shops and 4S shops.

[0016] 5. Convenient operation and high safety: The bottom of the device is equipped with universal wheels and straight pulleys with self-locking mechanisms. It can be easily moved by pushing the handle and can be stably fixed after locking, making it easy to quickly position. The lifting knob, lower knob, upper knob and handle are all equipped with anti-slip structures to prevent hands from slipping during operation. The anti-slip texture of the arc-shaped limit strip and the elastic pad further enhance the stability of the tire fixation, prevent the tire from falling off during operation, and improve the safety and convenience of use.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the present invention; Figure 3 for Figure 2 Sectional view of AA in the middle; Figure 4 for Figure 3 Cross-sectional view of the middle section (BB); Figure 5 for Figure 4 CC section view; Figure 6 This is a schematic diagram of the structure of the present invention after the tire assembly is installed; Figure 7 This is a schematic diagram of the process of loading the tire assembly according to the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Base plate; 101. Support rod; 102. Horizontal plate; 103. Adjustment box; 104. Worm gear; 105. Lifting knob; 106. Guide rod; 107. Straight pulley; 108. Universal wheel; 109. Push handle; 2. Adjustment plate; 201. Guide block; 202. Lifting screw; 203. Turbine; 204. Slide groove; 205. Lower adjusting screw; 206. Lower knob; 207. Adjustment block; 3. Support plate; 301. Upper slide groove; 302. Upper adjusting screw; 303. Upper knob; 304. Screw hole; 305. Limiting rod; 306. Auxiliary limiting component; 307. Limiting plate; 308. Arc-shaped limiting strip; 309. Support plate; 4. Tire assembly. Detailed Implementation

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

[0022] In the description of this invention, it should be understood that the terms "upper," "middle," "outer," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Example 1 Please see Figures 1-7 As shown, the present invention is an easy-to-use auxiliary device for tire assembly installation, including a base plate 1, an adjusting plate 2, and a receiving plate 3. Support rods 101 are fixed at both ends of one side of the base plate 1. A horizontal plate 102 is fixed to the upper ends of the two support rods 101. An adjusting box 103 is provided on the upper surface of the horizontal plate 102. A worm gear 104 is rotatably connected inside the adjusting box 103. The smooth end of the worm gear 104 passes through the adjusting box 103 and is fixed with a lifting knob 105. Guide rods 106 are fixed on both sides of the horizontal plate 102. The lower ends of the guide rods 106 are fixedly connected to the base plate 1. One side of the adjusting plate 2 is provided with a guide block 201 that is slidably connected to the guide rod 106. The guide block 201 has a Z-shaped plate structure. A lifting screw 202 is threadedly connected to the middle of the upper surface of the guide block 201. The upper end of the lifting screw 202 extends through the horizontal plate 102 into the adjusting box 103 and is fixed with a turbine 203 that matches the worm gear 104. A downward groove 204 is opened on the upper surface of the adjusting plate 2. A lower adjusting screw 205 is rotatably connected in the downward groove 204. One end of the lower adjusting screw 205 extends through the adjusting plate 2 to the outside and is fixed with a lower knob 206. An adjusting block 207 that matches the downward groove 204 is rotatably connected to the periphery of the lower adjusting screw 205. The lower surface of the receiving plate 3 has an upper sliding groove 301 that matches the adjusting block 207. An upper adjusting screw 302 is rotatably connected in the upper sliding groove 301. One end of the upper adjusting screw 302 extends through the receiving plate 3 to the outside and is fixed with an upper knob 303. The circumferential side of the upper adjusting screw 302 is threadedly engaged with the screw hole 304 opened on the upper part of the adjusting block 207. A limiting rod 305 is inclinedly installed above the receiving plate 3. The limiting rod 305 is a "V" tubular structure. A support plate 309 is fixed to the lower arc surface of the limiting rod 305. The lower surface of the support plate 309 is fixedly connected to the receiving plate 3. An auxiliary limiting component 306 is rotatably connected between the two support plates 309 located at the opening of the limiting rod 305. The auxiliary limiting component 306 includes two limiting plates 307 that are rotatably connected to the support plate 309. A plurality of arc-shaped limiting strips 308 that match the tire assembly are fixed between the two limiting plates 307. The arc-shaped limiting strips 308 are fixed circumferentially between the two support plates 309.

[0025] Furthermore, two straight pulleys 107 are provided at the front end of the lower surface of the base plate 1, and two universal wheels 108 with self-locking mechanisms are provided at the rear end.

[0026] Furthermore, the adjusting block 207 has a cuboid structure, and the shape and size of the adjusting block 207 are adapted to the sliding groove 204. The adjusting block 207 is threadedly engaged with the lower adjusting screw 205, and the adjusting block 207 is slidably engaged with the sliding groove 204.

[0027] Furthermore, the shape and size of the adjusting block 207 are adapted to the upper sliding groove 301, the adjusting block 207 is threadedly engaged with the upper adjusting screw 302, and the adjusting block 207 is slidably engaged with the upper sliding groove 301.

[0028] Furthermore, the surface of the arc-shaped limiting strip 308 is provided with anti-slip texture, which is a mesh or stripe structure.

[0029] Furthermore, push handles 109 are fixed on both sides of the upper end of the horizontal plate 102. The outer surface of the push handles 109 is covered with an anti-slip rubber layer, and the anti-slip rubber layer has concave and convex anti-slip textures. The outer surfaces of the lifting knob 105, the lower knob 206 and the upper knob 303 are all provided with anti-slip textures.

[0030] Furthermore, elastic pads for fixing the tire assembly are provided on both sides of the limiting rod 305.

[0031] Furthermore, the limiting plate 307 of the auxiliary limiting assembly 306 can rotate around its connection point with the support plate 309 to accommodate tire assemblies of different sizes.

[0032] Example 1 Please see Figures 1-7 As shown, this embodiment illustrates a method for using an easy-to-use auxiliary device for tire assembly installation, comprising the following steps: S1. Device positioning and fixing: Move the device to the working area so that the open end of the limit rod 305 is facing the tire assembly to be installed on the car. Step on the self-locking mechanism of the universal wheel 108 to fix the entire device stably on the ground and prevent it from moving during operation.

[0033] S2, Loading of the tire assembly: Align the tire assembly with the auxiliary limiting component 306 and roll the tire assembly. The auxiliary limiting component 306 rotates along the hinge point, causing the tire assembly to engage with the "V"-shaped limiting rod 305. The weight of the tire assembly is supported by the limiting rod 305 and the limiting component 306. Depending on the size of the tire assembly, the two limiting plates 307 of the auxiliary limiting component 306 will rotate adaptively, using their arc-shaped limiting strips 308 to engage and limit the tire from the outside, preventing it from swaying left or right or falling off.

[0034] S3, Coarse Height Adjustment: Rotating the lifting knob 105 clockwise or counterclockwise causes the worm gear 104 fixed to it to rotate. The worm gear 104 drives the turbine 203 meshing with it to rotate. The turbine 203 drives the lifting screw 202 to rotate. Since the lifting screw 202 is threadedly engaged with the guide block 201, and the guide block 201 restricts its rotation through the guide rod 106, the rotation of the lifting screw 202 will be converted into the overall upward or downward movement of the adjusting plate 2, thereby realizing a quick preliminary height adjustment of the tire assembly carried on it, so that its height is close to the mounting surface of the car wheel hub.

[0035] S4. Fine-tuning of horizontal position: Rotating the lower knob 206 causes the lower adjusting screw 205 to rotate. The rotation of the lower adjusting screw 205 drives the adjusting block 207, which is threadedly engaged with it, to slide back and forth (with the direction towards the car as the front) along the lower groove 204.

[0036] Rotating the upper knob 303 causes the upper adjusting screw 302 to rotate. Since the upper adjusting screw 302 is threadedly engaged with the screw hole 304 on the upper part of the adjusting block 207, and the adjusting block 207 is restricted within the upper sliding groove 301, the rotation of the upper adjusting screw 302 will drive the entire receiving plate 3 and all its components (including the limit rod and tire assembly) to slide left and right along the adjusting block 207.

[0037] By adjusting in the two directions mentioned above, the bolt holes on the tire assembly can be precisely aligned with the bolts on the car wheel hub.

[0038] S5. Installation and Removal: After the tire assembly and wheel bolts are initially aligned, the maintenance personnel can easily pre-tighten the bolts by hand several turns, and then use tools to tighten all bolts to the specified torque to complete the installation. After installation, release the self-locking mechanism of the caster wheel 108 and remove the device. When removing the old tire, the steps are reversed: first, position and lock the device, remove the bolts, use the device to support the tire assembly, and then unlock and remove the device.

[0039] Example 3 In practical use, this tire assembly mounting auxiliary device demonstrates excellent applicability and ease of operation. Specific application scenarios are as follows: A car repair shop needed to replace the rear tire assembly of an SUV. The repairman pushed the device to the rear of the vehicle and easily moved it using the handle 109. The device was precisely positioned using the front straight pulley 107 and the rear self-locking swivel wheel 108. After depressing the self-locking mechanism of the swivel wheel, the device came to a stable stop. The repairman then pushed the approximately 25kg tire assembly into the "V"-shaped limiting rod 305 using the auxiliary limiting component 306. The auxiliary limiting component 306 automatically adjusted the angle of the limiting plate 307 according to the size of the tire assembly, and the arc-shaped limiting strip 308 tightly conformed to the outer side of the tire, with anti-slip treads effectively preventing slippage.

[0040] Subsequently, the maintenance personnel rotated the lifting knob 105, which, through the worm gear 104 and turbine 203, drove the lifting screw 202 to rotate, causing the adjusting plate 2 to rise smoothly along the guide rod 106, raising the tire assembly to a height approximately level with the wheel hub. Next, by rotating the lower knob 206 and the upper knob 303 respectively, the position of the adjusting block 207 in the front, back, left, and right directions was finely adjusted to ensure precise alignment of the tire bolt holes with the wheel hub bolts. The maintenance personnel easily pre-tightened the bolts into the holes and finally used a torque wrench to complete the tightening. The entire installation process requires only one person and takes less than 5 minutes, significantly improving work efficiency.

[0041] It should be further noted that the lifting knob 105, lower knob 206 and upper knob 303 in this invention can be replaced with servo motors according to actual practical needs.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An easy-to-use auxiliary device for tire assembly installation, comprising a base plate (1), an adjusting plate (2), and a receiving plate (3), characterized in that: The base plate (1) has support rods (101) fixed at both ends on one side. The upper ends of the two support rods (101) are fixed to a horizontal plate (102). An adjustment box (103) is provided on the upper surface of the horizontal plate (102). A worm gear (104) is rotatably connected inside the adjustment box (103). The smooth end of the worm gear (104) passes through the adjustment box (103) and is fixed with a lifting knob (105). Guide rods (106) are fixed on both sides of the horizontal plate (102). The lower end of the guide rods (106) is fixedly connected to the base plate (1). The adjusting plate (2) has a guide block (201) slidably connected to the guide rod (106) on one side. The guide block (201) has a Z-shaped plate structure. A lifting screw (202) is threadedly connected to the middle of the upper surface of the guide block (201). The upper end of the lifting screw (202) extends through the horizontal plate (102) into the adjusting box (103) and is fixed with a turbine (203) that matches the worm gear (104). A sliding groove (204) is opened on the upper surface of the adjusting plate (2). A lower adjusting screw (205) is rotatably connected in the sliding groove (204). One end of the lower adjusting screw (205) extends through the adjusting plate (2) to the outside and is fixed with a lower knob (206). An adjusting block (207) that matches the sliding groove (204) is rotatably connected to the periphery of the lower adjusting screw (205). The lower surface of the receiving plate (3) is provided with an upper sliding groove (301) that matches the adjusting block (207). An upper adjusting screw (302) is rotatably connected in the upper sliding groove (301). One end of the upper adjusting screw (302) extends through the receiving plate (3) to the outside and is fixed with an upper knob (303). The peripheral side of the upper adjusting screw (302) is threadedly engaged with the screw hole (304) opened on the upper part of the adjusting block (207). A limiting rod (305) is inclinedly provided above the receiving plate (3). The limiting rod (305) is a "V" tubular structure. A support plate (309) is fixed on the lower arc surface of the limiting rod (305). The lower surface of the support plate (309) is fixedly connected to the receiving plate (3). An auxiliary limiting component (306) is rotatably connected between the two support plates (309) located at the opening of the limiting rod (305). The auxiliary limiting component (306) includes two limiting plates (307) that are rotatably connected to the support plate (309). A plurality of arc-shaped limiting strips (308) that match the tire assembly are fixed between the two limiting plates (307). The arc-shaped limiting strips (308) are fixed circumferentially between the two support plates (309).

2. The easy-to-use auxiliary device for tire assembly installation according to claim 1, characterized in that, The bottom plate (1) has two straight pulleys (107) at the front end and two universal wheels (108) with self-locking mechanisms at the rear end.

3. The easy-to-use auxiliary device for tire assembly installation according to claim 1, characterized in that, The adjusting block (207) has a cuboid structure. The shape and size of the adjusting block (207) are adapted to the sliding groove (204). The adjusting block (207) is threadedly engaged with the lower adjusting screw (205), and the adjusting block (207) is slidably engaged with the sliding groove (204).

4. The easy-to-use auxiliary device for tire assembly installation according to claim 1, characterized in that, The shape and size of the adjusting block (207) are adapted to the upper sliding groove (301). The adjusting block (207) is threadedly engaged with the upper adjusting screw (302), and the adjusting block (207) is slidably engaged with the upper sliding groove (301).

5. The easy-to-use auxiliary device for tire assembly installation according to claim 1, characterized in that, The surface of the arc-shaped limiting strip (308) is provided with anti-slip texture, which is a mesh or stripe structure.

6. The easy-to-use auxiliary device for tire assembly installation according to claim 1, characterized in that, Push handles (109) are fixed on both sides of the upper end of the horizontal plate (102). The outer surface of the push handles (109) is covered with an anti-slip rubber layer, and the anti-slip rubber layer is provided with concave and convex anti-slip textures. The outer surfaces of the lifting knob (105), the lower knob (206) and the upper knob (303) are all provided with anti-slip textures.

7. The easy-to-use auxiliary device for tire assembly installation according to claim 1, characterized in that, The limiting rod (305) has elastic pads on both sides for fixing the tire assembly.

8. The easy-to-use auxiliary device for tire assembly installation according to claim 1, characterized in that, The limiting plate (307) of the auxiliary limiting component (306) can rotate about the connection point between it and the support plate (309) to accommodate tire assemblies of different sizes.

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