A special tool for large diesel engine fuel injector

Abstract

The utility model discloses a special tool for the dismounting of large diesel engine oil sprayer, which comprises a baffle, a bolt, a pin mounting block and a base plate. The baffle is in two groups, and the two groups of baffles are arranged on the top surface of the base plate. A square groove is formed on the baffle, and the square groove is used for cooperating with the step of the oil sprayer. The pin mounting block is arranged on each group of baffles, and a pin hole matched with the bolt is formed on the pin mounting block. The pin hole is a threaded hole, and the bolt is provided with a thread. The pin mounting block is a nut, and two groups of nuts are welded on the inner side of each group of baffles. An installation hole is formed on the base plate, and a mounting screw is arranged in the installation hole. The special tool for the large diesel engine oil sprayer can quickly complete the disassembly and assembly of the oil head. The device is made of waste materials, and the manufacturing process is simple and the cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive repair tools, and in particular to a special tool for large diesel engine injectors. Background Technology

[0002] As a key component of the diesel engine fuel supply system, the fuel injector integrates precision components such as springs and ejector pins. Its working condition directly affects the fuel atomization effect and the diesel engine combustion efficiency. Therefore, the disassembly and inspection process requires precise inspection of the wear, deformation and sealing of the internal components to ensure the reliable operation of the equipment after subsequent installation.

[0003] Due to the complex structure of the fuel injector and the high precision requirements of its assembly, its locking bolts need to reach a tightening torque of 750 N·m to ensure sealing performance. Manual operation cannot meet the torque requirements and is prone to damage to the fuel injector housing. Therefore, special disassembly and inspection tools must be used to complete the disassembly and assembly operations.

[0004] Currently, the industry generally uses the injector disassembly and inspection tools provided by diesel engine manufacturers, such as those attached. Figure 3 As shown, while this tool can meet basic disassembly and inspection needs, it reveals significant shortcomings in actual maintenance applications: its structure requires the cooperation of a cover plate and a baffle to position the injector. Before each operation, it is necessary to first remove the four locking bolts on the cover plate, remove the cover plate, place the injector into the slot of the baffle, and then reassemble the cover plate and tighten the four locking bolts before disassembly and inspection can be carried out. Since maintenance every 3000 hours requires disassembling and inspecting 16 injectors one by one, the repetitive process of "removing bolts - removing cover plate - installing injector - installing cover plate - tightening bolts" results in the bolts being repeatedly disassembled and reassembled up to 64 times (16 injectors × 4 times / time), greatly extending the disassembly and inspection time for a single injector and severely restricting overall maintenance efficiency.

[0005] In addition, the procurement cost of the supporting disassembly and inspection tools is relatively high, which further increases the economic cost of equipment operation and maintenance for scenarios that require regular maintenance and may face tool wear and tear. Utility Model Content

[0006] This utility model aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, the purpose of this utility model is to provide a special tool for large diesel engine injectors, which can more quickly complete the disassembly and assembly of the injector head. The device is made from recycled materials, has a simple manufacturing process, and is low in cost.

[0008] To achieve the above objectives, this utility model proposes a special tool for disassembling and assembling large diesel engine injectors, including a baffle, a pin, a pin mounting block, and a chassis. The number of baffles is two sets, and the two sets of baffles are set on the top surface of the chassis. The baffles are provided with square grooves, which are used to cooperate with the steps of the fuel injector. Each of the baffles is provided with a pin mounting block, and the pin mounting block has a pin hole that matches the pin.

[0009] This utility model relates to a special tool for large diesel engine injectors, which enables faster disassembly and assembly of the injector head. The device is made from recycled waste materials, has a simple manufacturing process, and is low in cost.

[0010] In addition, the special tool for large diesel engine injectors proposed in this application may also have the following additional technical features: Furthermore, the pin hole is a threaded hole, and the pin is provided with threads.

[0011] Furthermore, the pin mounting block is a nut, and two sets of the nuts are welded to the inner side of each set of baffles.

[0012] Furthermore, the chassis has mounting holes, and mounting screws are installed in the mounting holes.

[0013] Furthermore, the distance between the two baffles is 100mm.

[0014] Furthermore, the baffle is made of carbon steel blind plate with a thickness of 20mm, and the yield strength of the carbon steel is 300MPa-500MPa.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a structural schematic diagram of a special tool for large diesel engine injectors according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the special tool for large diesel engine injectors and the injector of this utility model. Figure 3 This is a schematic diagram of the structure of an existing fuel injector-specific tool.

[0017] As shown in the figure: 1. Baffle; 2. Pin; 3. Pin mounting block; 4. Chassis; 5. Mounting screw; 6. Square groove; 7. Injector; 8. Cover plate; 9. Existing injector-specific tools. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0019] The following description, in conjunction with the accompanying drawings, describes a special tool for large diesel engine injectors according to an embodiment of the present invention.

[0020] like Figures 1-2 As shown, the present invention provides a special tool for disassembling and assembling large diesel engine injectors, including a baffle 1, a pin 2, a pin mounting block 3, and a chassis 4. There are two sets of baffles 1, and the two sets of baffles 1 are set on the top surface of the chassis 4. The baffles 1 are provided with square grooves 6, which are used to cooperate with the steps of the fuel injector. Each set of baffles 1 is provided with a pin mounting block 3, and the pin mounting block 3 has a pin hole that matches the pin 2.

[0021] Specifically, the working process of the special tool for disassembling and assembling large diesel engine injectors is as follows: Fix the chassis 4 to the workbench, and keep the two sets of baffles 1 stably supported at a preset distance; insert the step of the injector to be disassembled into the square groove 6 of the two sets of baffles 1, so that the injector is initially positioned by the cooperation of the step and the square groove 6; insert the pin 2 into the pin hole of the pin mounting block 3 until the end of the pin 2 abuts against the outer wall of the injector, and lock the injector in the square groove 6 by the matching cooperation of the pin 2 and the pin hole to prevent the injector from shifting during the disassembly and assembly process; after completing the disassembly and assembly of the injector, pull out the pin 2 to release the lock, and take the injector out of the square groove 6.

[0022] When the injector is inserted into the square groove 6, the axis of the injector is aligned with the groove depth of the square groove 6, and the injector's rubber ring is located in the gap area between the two sets of baffles 1.

[0023] The depth to which pin 2 enters the pin hole can be adjusted according to the outer diameter of the injector to ensure effective locking for injectors of different specifications.

[0024] In one embodiment of this utility model, the pin hole is a threaded hole, and the pin 2 is provided with threads.

[0025] Specifically, this structure uses the helical transmission characteristics of the thread to realize the axial feeding and retraction of the pin 2 in the pin hole. It can precisely control the clamping force of its end against the injector by rotating the pin 2, and can also use the self-locking characteristics of the thread to ensure the stability of the locked state, preventing the pin 2 from loosening on its own due to external forces such as vibration during tool operation.

[0026] When the tool is in operation, after the injector step is initially positioned by engaging the square groove 6 of the baffle 1, align the pin 2 with the pin hole and rotate the pin 2 to screw it in along the internal thread of the threaded hole. As the pin 2 is screwed in, its end gradually approaches and presses against the outer wall of the injector. The continuous axial force generated by the threaded engagement securely locks the injector in the square groove 6, preventing displacement or shaking of the injector during disassembly and assembly. When it is necessary to release the lock, rotate the pin 2 in the opposite direction to screw it out along the internal thread of the threaded hole. The end of the pin 2 separates from the outer wall of the injector, and the injector can then be removed from the square groove 6.

[0027] In one embodiment of this utility model, the pin mounting block 3 is a nut, and two sets of nuts are welded to the inner side of each set of baffles 1.

[0028] Specifically, a 10mm diameter No. 45 steel straight rod is selected as the pin 2, and the surface is chrome-plated to reduce friction; the internal thread of the original hexagonal nut is removed and machined into a smooth through hole with a diameter of 10.2mm to form a pin hole. The fit clearance between the pin 2 and the pin hole is 0.2mm, which ensures that the pin 2 can be easily inserted and avoids radial wobble; two sets of modified hexagonal nuts are welded to the inner side of each set of baffles 1. The center distance between the two sets of nuts is 35mm, the hole axis is perpendicular to the wall of the square groove 6, and the hole opening is rounded to facilitate the guidance of the pin 2.

[0029] In actual operation, the operator holds the pin 2, aligns it with the light hole of the nut, and inserts the pin 2 to a depth of 30mm in just 1-2 seconds, with the end pressing against the outer wall of the injector to lock it; when unlocking, the exposed part of the pin 2 is pulled out directly, which takes less than 1 second.

[0030] In one embodiment of this utility model, a mounting hole is provided on the chassis 4, and a mounting screw 5 is provided in the mounting hole.

[0031] Specifically, the structure uses mounting screws 5 and mounting holes to detachably fix the chassis 4 to the support surface.

[0032] In one embodiment of this utility model, the distance between the two baffles 1 is 100mm.

[0033] Specifically, the 100mm spacing design is based on the conventional structural characteristics of large diesel engine injectors: the outer diameter of the rubber ring of most large diesel engine injectors is concentrated in the range of 85-95mm. The 100mm spacing allows the rubber ring to be completely in the gap area between the two sets of baffles 1 after the injector is inserted into the square groove 6. It neither contacts the inner wall of the baffle 1 nor exceeds the gap range, thus structurally avoiding the squeezing or scratching damage of the rubber ring by the baffle 1 during disassembly and assembly operations.

[0034] In one embodiment of this utility model, the baffle 1 is made of carbon steel blind plate with a thickness of 20mm, and the yield strength of carbon steel is 300MPa-500MPa.

[0035] Specifically, baffle 1 uses carbon steel blind flange as the base material. Its core advantage lies in the fact that it is a solid, seamless, complete sheet material. Carbon steel blind flange is a common pipe sealing component in industrial scenarios. It has a dense metal structure and no weak stress points such as weld seams or holes, which can prevent fracture or local cracking due to structural defects when under stress. At the same time, carbon steel blind flange is a conventional industrial waste component, such as a pipe blind flange that is idle after platform maintenance. It can be directly processed into the shape of baffle 1 through on-site processes such as gas cutting and grinding, without the need to purchase additional customized sheet materials.

[0036] In one embodiment of this utility model, this tool, attached Figure 1 The square groove 6 on the baffle 1 mates with the step on the injector. After unscrewing the pin 2 on the baffle 1, the injector can be inserted into the two square grooves 6 on the baffle 1. Then, the pin 2 is screwed into the nut on the baffle 1 that is fixed by welding. In this way, the injector is fixed, and then the large bolt with a tightening torque of 750 N.M can be installed or removed, or other operations can be performed. In addition, the position of the bolt baffle 1 is designed to avoid the rubber ring on the injector, thus avoiding damage to the rubber ring during operation.

[0037] In summary, the present invention provides a special tool for large diesel engine injectors, which has significant effects: the device can complete the disassembly and assembly of the injector head more quickly.

[0038] Good applicability: With proper modification of the size of this device, it can be adapted to the disassembly and assembly of oil heads for almost all large and medium-sized diesel engines.

[0039] Economical: The materials used in this device are recycled waste, and the manufacturing process can be completed on-site, so the cost is very low.

[0040] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., 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 present invention. In this specification, the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A special tool for large diesel engine injectors, characterized in that, Includes baffle (1), pin (2), pin mounting block (3) and chassis (4); The number of baffles (1) is two sets, and the two sets of baffles (1) are set on the top surface of the chassis (4). The baffles (1) are provided with square grooves (6), which are used to cooperate with the steps of the fuel injector. Each of the baffles (1) is provided with a pin mounting block (3), and the pin mounting block (3) is provided with a pin hole that matches the pin (2).

2. The special tool for large diesel engine injectors according to claim 1, characterized in that, The pin hole is a threaded hole, and the pin (2) is provided with threads.

3. The special tool for large diesel engine injectors according to claim 1, characterized in that, The pin mounting block (3) is a nut, and two sets of the nuts are welded to the inner side of each set of baffles (1).

4. The special tool for large diesel engine injectors according to claim 1, characterized in that, The chassis (4) has mounting holes, and mounting screws (5) are provided in the mounting holes.

5. The special tool for large diesel engine injectors according to claim 1, characterized in that, The distance between the two baffles (1) is 100mm.

6. The special tool for large diesel engine injectors according to claim 1, characterized in that, The baffle (1) is made of carbon steel blind plate with a thickness of 20mm, and the yield strength of the carbon steel is 300MPa-500MPa.

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