Rotation stopping structure for valve spring of automobile engine

Abstract

The utility model discloses an automobile engine valve spring rotation stopping structure which comprises a valve guide pipe, a valve spring, a rotation stopping rod and a locking rod, one end of the rotation stopping rod is fixedly connected with a connecting plate, and one side of the connecting plate is fixedly connected with a first electromagnet connected with the valve guide pipe in a matched mode. A connecting assembly is arranged at one end of the locking rod and used for fixing the locking rod to the valve spring, the connecting assembly comprises a mounting frame fixedly connected to the locking rod, two clamping plates arranged on the inner side of the mounting frame and a positioning assembly, one clamping plate is fixedly connected to the mounting frame, and the other clamping plate is fixedly connected to the positioning assembly. The positioning assembly is used for positioning the other clamping plate on the outer side of the valve spring. Through the above structure, the design of the rotation stopping rod and the locking rod realizes rapid and lossless disassembly and assembly through the first electromagnet, the second electromagnet and the clamping plate structure, the operation is simple and convenient, the versatility is strong, the device can be repeatedly used, the detection efficiency and accuracy are improved, and the device can be better suitable for a valve spring stress test scene needing disassembly and assembly.

Description

Technical Field

[0001] This utility model relates to the field of engine valve spring stress testing technology, and in particular to an anti-rotation structure for automotive engine valve springs. Background Technology

[0002] Currently, valve springs are one of the main components of the engine's valve train, and their durability and reliability are the main evaluation indicators. Therefore, stress testing of valve springs is necessary to assess these indicators.

[0003] In the prior art, a search revealed a Chinese patent disclosing "Anti-rotation Structure for Valve Springs in Automobile Engines," application number "202022947794.6." This patent includes a valve spring, a locking rod, an anti-rotation rod, a valve guide, and a cylinder head. The valve spring is connected to the locking rod, and the anti-rotation rod is L-shaped, mounted on the cylinder head and valve guide. The locking rod and the anti-rotation rod mutually constrain the valve spring, preventing it from rotating within a certain angle. Under normal operating conditions, the valve spring rotates circumferentially. When the engine is running under normal conditions, the camshaft provides a rotational force to the valve tappet, which transmits a portion of this force to the valve spring, causing it to rotate along with the valve spring. This ensures that the strain gauge wires and strain gauges are not easily damaged. While the aforementioned utility model offers advantages such as welding the anti-rotation rod to the lowest spring ring of the valve spring and attaching the locking rod to the engine's valve guide and cylinder head, allowing the anti-rotation rod to rotate within 25° to achieve mutual restraint and prevent valve spring rotation, it has significant drawbacks. Welding the anti-rotation rod to the lowest spring ring increases installation complexity and time costs. Furthermore, after inspection, disassembly requires cutting or damaging the welded area, which is not only cumbersome but may also damage the valve spring, hindering simple and non-destructive disassembly and potentially leading to valve spring deformation or performance degradation, thus affecting its subsequent use. Therefore, this utility model provides an anti-rotation structure for automotive engine valve springs to address the problems mentioned in the background section. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-rotation structure for automotive engine valve springs. The anti-rotation rod and locking rod design achieves quick and non-destructive disassembly and assembly through a first electromagnet, a second electromagnet, and a clamping plate structure. It is easy to operate, highly versatile, and reusable, improving testing efficiency and accuracy, and is better suited for valve spring stress testing scenarios that require disassembly and assembly.

[0005] To achieve the above objectives, an anti-rotation structure for a valve spring in an automotive engine is provided, comprising a valve guide, a valve spring, an anti-rotation rod, and a locking rod. One end of the anti-rotation rod is fixedly connected to a connecting plate, and a first electromagnet that cooperates with and is connected to the valve guide is fixedly connected to one side of the connecting plate.

[0006] One end of the locking rod is provided with a connecting assembly, which is used to fix the locking rod to the valve spring. The connecting assembly includes a mounting bracket fixedly connected to the locking rod, two clamps located inside the mounting bracket, and a positioning assembly. One of the clamps is fixedly connected to the mounting bracket, and the positioning assembly is used to position the other clamp on the outside of the valve spring.

[0007] According to the aforementioned automotive engine valve spring anti-rotation structure, the positioning component includes a slide groove formed on the top side of the mounting bracket, a connecting rod slidably connected inside the slide groove, a second electromagnet fixedly connected to the top of the mounting bracket, and a metal plate fixedly connected to the top of the connecting rod and disposed near the second electromagnet. The bottom of the connecting rod is fixedly connected to a movable clamping plate.

[0008] According to the aforementioned automotive engine valve spring anti-rotation structure, the valve guide is made of metal.

[0009] According to the aforementioned anti-rotation structure for automobile engine valve springs, the side of the first electromagnet near the valve guide is designed with an arc shape.

[0010] According to the aforementioned anti-rotation structure for automobile engine valve springs, each of the opposing sides of the clamping plates is provided with a groove structure that matches the shape of the valve spring.

[0011] According to the aforementioned anti-rotation structure for automobile engine valve springs, a soft pad is fixedly connected to the side of the locking rod near the vertical section of the anti-rotation rod.

[0012] According to the aforementioned anti-rotation structure for automotive engine valve springs, a limiting plate is fixedly connected to the outer side of the connecting rod and to the upper and lower sides of the slide groove.

[0013] This utility model has the following beneficial effects:

[0014] 1. Compared with existing technologies, the anti-rotation rod and locking rod design of this utility model achieves rapid and non-destructive assembly and disassembly through a first electromagnet, a second electromagnet, and a clamping plate structure, which is superior to traditional welding or bolt fixing methods. It is easy to operate, highly versatile, and reusable, improving testing efficiency and accuracy, and is better suited for valve spring stress testing scenarios requiring disassembly and assembly. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the overall structure of an anti-rotation structure for a valve spring of an automobile engine according to the present invention.

[0017] Figure 2 This is a schematic diagram of the locking rod and connecting assembly of an anti-rotation structure for a valve spring in an automobile engine according to this utility model.

[0018] Figure 3 This utility model relates to an anti-rotation structure for automobile engine valve springs. Figure 2 Another perspective structural diagram;

[0019] Figure 4 This utility model relates to an anti-rotation structure for automobile engine valve springs. Figure 3 Enlarged structural diagram at point A in the middle.

[0020] Legend:

[0021] 1. Valve guide; 2. Valve spring; 3. Anti-rotation rod; 4. Locking rod; 5. Connecting plate; 6. First electromagnet; 7. Mounting bracket; 8. Second electromagnet; 9. Soft pad; 10. Clamping plate; 11. Slide groove; 12. Limiting plate; 13. Connecting rod; 14. Metal plate. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] Reference Figure 1-4 This utility model discloses an anti-rotation structure for a valve spring in an automobile engine, comprising a valve guide 1, a valve spring 2, an anti-rotation rod 3, and a locking rod 4. One end of the locking rod 4 is provided with a connecting assembly for fixing the locking rod 4 to the valve spring 2. The connecting assembly includes a mounting bracket 7 fixedly connected to the locking rod 4, two clamping plates 10 disposed inside the mounting bracket 7, and a positioning assembly. One clamping plate 10 is fixedly connected to the mounting bracket 7, and the positioning assembly is used to position the other clamping plate 10 outside the valve spring 2. The positioning assembly includes a groove 11 opened on the top side of the mounting bracket 7, a connecting rod 13 slidably connected inside the groove 11, a second electromagnet 8 fixedly connected to the top of the mounting bracket 7, and a metal plate 14 fixedly connected to the top of the connecting rod 13 and disposed near the second electromagnet 8. The bottom of the connecting rod 13 is fixedly connected to the movable clamping plate 10.

[0024] When the locking rod 4 is installed on the valve spring 2 to be tested, the clamping plate 10 is located on both sides of the valve spring 2. When the second electromagnet 8 is energized, the metal plate 14 is attracted, which drives the connecting rod 13 to slide along the slide groove 11, thereby making the movable clamping plate 10 move closer to the valve spring 2 and cooperate with the fixed clamping plate 10 to clamp the valve spring 2, thus fixing the locking rod 4. The operation is simple.

[0025] One end of the anti-rotation rod 3 is fixedly connected to a connecting plate 5, and a first electromagnet 6 that is connected to the valve guide 1 is fixedly connected to one side of the connecting plate 5. The valve guide 1 is made of metal, and the commonly used materials for the valve guide 1 include steel.

[0026] When the first electromagnet 6 is energized, it attracts the valve guide 1, fixing the anti-rotation rod 3 to the valve guide 1, preventing the valve spring 2 from rotating, ensuring a stable connection while facilitating disassembly and assembly.

[0027] The first electromagnet 6 has an arc-shaped structure on the side near the valve guide 1 to increase the contact area and improve adsorption stability. The opposing sides of the clamping plates 10 are provided with groove structures that match the shape of the valve spring 2 to increase clamping stability and contact area, and to prevent the valve spring 2 from loosening during clamping.

[0028] A soft pad 9 is fixedly connected to the side of the locking rod 4 near the vertical section of the anti-rotation rod 3 to cushion collisions and reduce noise and wear.

[0029] Limiting plates 12 are fixedly connected to the outer side of the connecting rod 13 and on the upper and lower sides of the slide groove 11 to limit the sliding range of the connecting rod 13 and prevent it from falling out of the slide groove 11.

[0030] Working principle: Under normal operating conditions, the valve spring rotates circumferentially. When the engine is running normally, the camshaft provides a rotational force to the valve tappet, which then transmits a portion of this force to the valve spring, causing it to rotate as well. Valve spring stress testing requires attaching strain gauges to the valve spring coil, which are then connected to external wires. Therefore, the rotation of the valve spring can damage the strain gauge wires, leading to inaccurate stress test results or strain gauge damage. Furthermore, during spring stress testing, the spring cannot be locked in a fixed position; it must rotate within a small angle range. This ensures both the accuracy of the stress test and prevents the strain gauge wires from becoming entangled.

[0031] When the anti-rotation rod 3 is fixed, the first electromagnet 6 is energized, which attracts the valve guide 1, so that the anti-rotation rod 3 is fixed on the valve guide 1 to prevent the valve spring 2 from rotating. The connection is stable and easy to disassemble and assemble.

[0032] When installing the locking rod 4, when the locking rod 4 is installed on the valve spring 2 to be tested, the clamping plate 10 is located on both sides of the valve spring 2. When the second electromagnet 8 is energized, the metal plate 14 is attracted, which drives the connecting rod 13 to slide along the slide groove 11, thereby making the movable clamping plate 10 move closer to the valve spring 2 and cooperate with the fixed clamping plate 10 to clamp the valve spring 2, thus fixing the locking rod 4. The operation is simple.

[0033] The anti-rotation rod 3 and locking rod 4 of this utility model are designed to achieve quick and non-destructive disassembly and assembly through the structure of the first electromagnet 6, the second electromagnet 8, and the clamping plate 10, which is superior to the traditional welding or bolt fixing method. It is easy to operate, highly versatile, and reusable, improving testing efficiency and accuracy, and is better suited for valve spring stress testing scenarios that require disassembly and assembly.

[0034] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An automobile engine valve spring rotation-stopping structure characterized by comprising: Including valve guide (1), valve spring (2), rotation stop rod (3) and locking rod (4), one end of the rotation stop rod (3) is fixedly connected with the connecting plate (5), one side of the connecting plate (5) is fixedly connected with the first electromagnet (6) matched with the valve guide (1); One end of the locking rod (4) is provided with a connecting assembly, the connecting assembly is used for fixing the locking rod (4) on the valve spring (2), the connecting assembly comprises a mounting bracket (7) fixedly connected with the locking rod (4), two clamping plates (10) arranged on the inner side of the mounting bracket (7) and a positioning assembly, one of the clamping plates (10) is fixedly connected with the mounting bracket (7), and the positioning assembly is used for positioning the other clamping plate (10) on the outer side of the valve spring (2).

2. The automobile engine valve spring anti-rotation structure according to claim 1, characterized in that, The positioning assembly comprises a sliding groove (11) formed in the top side of the mounting bracket (7), a connecting rod (13) slidably connected in the sliding groove (11), a second electromagnet (8) fixedly connected with the top of the mounting bracket (7) and a metal plate (14) fixedly connected with the top of the connecting rod (13) and arranged close to the second electromagnet (8), and the bottom of the connecting rod (13) is fixedly connected with the movable clamping plate (10).

3. The automobile engine valve spring anti-rotation structure according to claim 2, characterized in that, The valve guide (1) is made of metal.

4. The automobile engine valve spring anti-rotation structure according to claim 3, characterized in that, The side of the first electromagnet (6) close to the valve guide (1) is provided with an arc-shaped structure.

5. The automobile engine valve spring anti-rotation structure according to claim 4, characterized in that, The opposite sides of the clamping plate (10) are provided with recess structures matched with the shape of the valve spring (2).

6. The automobile engine valve spring anti-rotation structure according to claim 1, characterized in that, The side of the locking rod (4) close to the vertical section of the rotation stop rod (3) is fixedly connected with a soft pad (9).

7. The automobile engine valve spring anti-rotation structure according to claim 2, characterized in that, The outer side of the connecting rod (13) and the upper and lower sides of the sliding groove (11) are fixedly connected with limiting plates (12).

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