A horseshoe-shaped anti-rotation device for a multi-cylinder engine fuel injector

Abstract

This invention relates to a horseshoe-shaped anti-rotation device for injectors in multi-cylinder engines, comprising a limiting block (1) and a locking plate (2). The limiting block (1) has a U-shaped structure. The limiting block (1) and the locking plate (2) combine to form a horseshoe-shaped structure, the thickness of which matches the gap between adjacent injectors, to compensate for the gap and restrict the rotation of the injectors. The locking plate (2) has an elastic protrusion structure to provide locking force after the device is assembled in place. The anti-rotation device is inserted into the gap between the injectors to form an interlocking structure between the injectors, preventing the injectors from rotating during operation and causing connection pipeline failure. This invention does not change the original injector structure, is easy to install, has low manufacturing cost, and high reliability. It can effectively prevent the injectors from rotating due to vibration, reduce the failure rate of the fuel supply system, and is suitable for modularly arranged power machinery such as multi-cylinder diesel engines.

Description

Technical Field

[0001] This invention belongs to the field of power machinery technology, specifically relating to a horseshoe-shaped anti-rotation device for fuel injectors in multi-cylinder engines. Background Technology

[0002] Modular configuration has become one of the current design requirements for products in the "three modernizations" (modularization, standardization, and modularization). For example, modular array structures are often seen in complex mechanical structures such as diesel engines, like the injectors of multi-cylinder diesel engines, which reduces manufacturing costs and maintenance difficulty. However, the vibrations generated by diesel engines during operation can cause parts to loosen, requiring corresponding anti-loosening measures to be designed according to the specific structural type. Summary of the Invention

[0003] This invention provides a horseshoe-shaped anti-rotation device for injectors of multi-cylinder engines, which solves the problem that the injectors of a certain multi-cylinder diesel engine randomly rotate during operation, causing frequent breakage of the inlet and outlet oil lines connected to them.

[0004] To solve the above technical problems, the present invention provides a horseshoe-shaped anti-rotation device for injectors of multi-cylinder engines, including a limiting block (1) and a locking plate (2). The limiting block (1) is a U-shaped structure. The limiting block (1) and the locking plate (2) are combined to form a horseshoe-shaped structure. The thickness of the horseshoe-shaped structure matches the gap between adjacent injectors, which is used to compensate for the gap and limit the rotation of the injectors. The locking plate (2) is provided with an elastic protrusion structure, which is used to provide locking force after the device is assembled in place.

[0005] Furthermore, one side of the limiting block (1) is fitted and positioned against the adjacent plane of the injector, and the locking piece (2) is designed with a matching elastic protrusion according to the recessed structure of the other injector side to prevent the device from rotating.

[0006] Furthermore, the thickness of the limiting block (1) and the locking piece (2) is adjusted according to the injector gap of different engine models to adapt to multi-cylinder engines of different specifications.

[0007] Furthermore, the locking piece (2) is made of an elastic metal sheet, which stores reset energy through its elastic deformation during assembly, thereby achieving automatic locking of the device.

[0008] Furthermore, the locking piece (2) is provided with a chamfered structure to facilitate the insertion and removal of the device in the injector gap.

[0009] Furthermore, the limiting block (1) and the locking piece (2) are manufactured separately and then assembled, or are integrally formed by additive manufacturing technology.

[0010] Furthermore, the protruding structure of the locking piece (2) is not fully reset after assembly, maintaining a certain elastic clamping force to prevent the device from loosening or producing noise due to vibration.

[0011] Furthermore, the top of the locking piece (2) is provided with an arc structure for guiding and positioning during assembly.

[0012] Furthermore, the tail end of the anti-rotation device is provided with at least one protruding point for adjusting the angle during assembly and providing a force point during disassembly.

[0013] Furthermore, the structural shape of the locking piece (2) is adaptively adjusted according to the structural characteristics of different injector sides to achieve a universal design.

[0014] Beneficial Effects: This invention utilizes the gaps between adjacent parts of the modularly designed injector to specifically design an anti-rotation device that is simple in structure, low in manufacturing cost, easy to install and remove, and reliable in use, thereby preventing the injector from loosening. This invention does not alter the original product structure; it utilizes the existing structure and assembly relationships of the original product, and by adding the anti-rotation device, it completes the interlocking structure of adjacent injectors, preventing the injectors from rotating during operational vibration, reducing the failure rate of the fuel supply system, and improving product reliability and maintenance costs. Attached Figure Description

[0015] Figure 1 The image shows a horseshoe-shaped anti-rotation device for fuel injectors in multi-cylinder engines. Figure 2 This is a schematic diagram of the assembly relationship of a horseshoe-shaped anti-rotation device for a multi-cylinder engine injector. Figure 3 This is a schematic diagram illustrating the orientation of a horseshoe-shaped anti-rotation device for a multi-cylinder engine injector. Figure 4 This is a schematic diagram of the current multi-injector layout. Detailed Implementation

[0016] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below.

[0017] This invention addresses the issue of random rotation during the operation of diesel engine injectors, which causes the connected inlet and outlet oil lines to rotate upwards. It proposes a horseshoe-shaped anti-rotation device for multi-cylinder engine injectors, which is installed between adjacent injectors and includes a limiting block (1) and a locking plate (2). The thickness of the limit block (1) and the locking piece (2) together is used to compensate for the gap between adjacent injectors and restrict the rotation of the injectors.

[0018] The locking plate is made of a thin sheet of a certain thickness. It is designed with a locally raised elastic structure and a transition chamfer to match the locking mating part. During assembly, the thin sheet passes through the adjacent gap of the injector through deformation, and the elastic deformation stores the energy required for resetting when the assembly is in place.

[0019] The elastic structure of the locking plate forms a stable matching structure with the mating parts, restricting the axial rotation of the anti-rotation device. The locally protruding structure prevents the anti-rotation device from sliding out of the gap. The locally protruding structure does not fully reset when assembled, continuously providing axial clamping force to the anti-rotation device to prevent vibration and noise during operation. The top of the anti-rotation device is designed with an arc for assembly positioning. The tail end of the anti-rotation device has three protrusions for adjusting the angle during assembly and providing a force point during disassembly.

[0020] The limiting block (1) provides a basic frame and support structure for the anti-rotation device.

[0021] The locking piece (2) passes through the assembly gap via an elastic sheet with local protrusions and provides axial clamping force.

[0022] The locking piece (2) achieves shape matching with the mating component through a protruding structure with a locally elastic thin sheet.

[0023] The locking piece (2) is designed with a chamfered corner on a raised structure with a local elastic sheet to prevent the anti-rotation device from being inserted into or released from the gap, thereby enabling the assembly and disassembly of the anti-rotation device.

[0024] The anti-rotation device achieves assembly positioning and release through the design of a top arc and a bottom protrusion.

[0025] The anti-rotation device limiting block (1) and locking plate (2) are manufactured separately and then assembled, reducing manufacturing difficulty and cost. Alternatively, they can be formed in one piece using lightweight additive manufacturing technology after assessing the stress conditions.

[0026] The limiting block (1) uses the adjacent plane of one side of the injector to provide positioning, and the locking piece (2) is a positioning structure with a shape matching the recessed structure of the adjacent side of the other injector to prevent the anti-rotation device from rotating randomly.

[0027] The thickness of the limiting block (1) and the locking piece (2) can be adjusted according to other usage scenarios with similar structures.

[0028] The locking plate (2) adopts a metal sheet structure of appropriate thickness, which provides energy for resetting when assembled in place through deformation.

[0029] The structure of the locking plate (2) can be adjusted according to the structural characteristics of different products.

[0030] Working principle: The locking plate (2) protrusion structure is not fully reset after assembly, and stores a certain amount of elastic force to press the anti-rotation device to avoid vibration and noise during operation.

[0031] The anti-rotation device has a rounded top for positioning during assembly.

[0032] The anti-rotation device has a raised point at the tail end for adjusting the angle during assembly and for providing a force point during disassembly.

[0033] By inserting the anti-rotation device of the present invention into the gap between the injectors, an interlocking structure is formed between the injectors, preventing the injectors from rotating during operation and thus causing connection pipeline failure.

[0034] Compared with the prior art, the present invention has the following advantages: (1) The present invention does not change the original product structure, but makes adaptive design by utilizing the existing structure and assembly relationship of the original product.

[0035] (2) The present invention completes the interlocking structure of adjacent injectors by adding an anti-rotation device, thereby preventing the injectors from rotating during operation vibration.

[0036] (3) The rotation of the fuel injector can be effectively restricted after the invention is used, which can reduce the failure rate of the fuel supply system, improve product reliability and maintenance costs.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector, comprising a limiting block (1) and a locking piece (2), characterized in that: The limiting block (1) has a U-shaped structure. The limiting block (1) and the locking plate (2) are combined to form a horseshoe-shaped structure. The thickness of the limiting block (1) matches the gap between adjacent injectors, which is used to compensate for the gap and restrict the rotation of the injectors. The locking plate (2) has an elastic protrusion structure, which is used to provide locking force after the device is assembled in place.

2. The horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The limiting block (1) is positioned in contact with the adjacent plane of the injector on one side, and the locking piece (2) is designed with a matching elastic protrusion according to the concave structure of the other injector side to prevent the device from rotating.

3. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The thickness of the limiting block (1) and the locking piece (2) is adjusted according to the injector gap of different engine models to adapt to multi-cylinder engines of different specifications.

4. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The locking plate (2) is made of elastic metal sheet, which stores reset energy through elastic deformation during assembly to achieve automatic locking of the device.

5. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The locking plate (2) has a chamfered structure, which facilitates the insertion and removal of the device in the injector gap.

6. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The limiting block (1) and the locking piece (2) are manufactured separately and then assembled, or are integrally formed by additive manufacturing technology.

7. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The protruding structure of the locking piece (2) is not fully reset after assembly, maintaining a certain elastic clamping force to prevent the device from loosening or making noise due to vibration.

8. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The top of the locking piece (2) is provided with an arc structure for guiding and positioning during assembly.

9. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The anti-rotation device has at least one protruding point at its tail end, which is used to adjust the angle during assembly and to provide a force point during disassembly.

10. A horseshoe-shaped anti-rotation device for a multi-cylinder engine injector according to claim 1, characterized in that: The shape of the locking piece (2) is adaptively adjusted according to the structural features of different injector sides to achieve a universal design.

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