Rotation stopping structure of valve spring

Abstract

The utility model discloses a valve spring rotation stopping structure, which relates to the technical field of valve springs, and comprises a sleeve and a valve spring main body, a limiting sleeve is arranged on one side in the sleeve, and an abutting frame is fixed on the other side in the sleeve. Through the arrangement of the limiting sleeve, the abutting frame, the fixing base, the elastic piece and the inserting groove, the valve spring body is limited through the limiting sleeve, horizontal displacement of the valve spring body is avoided, when the valve spring body rotates to drive the fixing base to rotate, at the moment, the fixing base abuts against the abutting frame, and therefore the situation that the rotating angle of the valve spring body is too large is avoided; when the valve spring main body is not stressed to rotate any more, the elastic piece releases force to return to a straight state, and meanwhile, the elastic piece applies force to the valve spring main body to enable the valve spring main body to rotate reversely and reset; and the structure is simple, the cost is low, electricity is not needed, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve springs, in particular to a valve spring anti-rotation structure. Background Art

[0002] The valve spring is located between the cylinder head and the spring seat at the end of the valve stem. The function of the valve spring is to ensure that the valve can fit tightly with the valve seat or valve seat ring when the valve is closed, and to overcome the inertia force generated by the valve mechanism when the valve is open, so that the transmission parts are always controlled by the cam and do not separate from each other. It is mostly made of high-quality alloy steel wire and heat-treated to improve its fatigue strength. In order to avoid spring corrosion, the spring surface should be galvanized and phosphated; usually, when the engine is running, the valve spring will rotate. If a strain gauge is installed on the rotating valve spring, the strain gauge wire will be damaged, so the stress cannot be tested, so a stop structure is needed.

[0003] A valve spring anti-rotation structure with application number 202321632427.4 comprises: an outer shell and an inner shell fixedly connected to an automobile engine, a valve spring is arranged in the inner shell, a first swing rod and a second swing rod are fixedly mounted on the valve spring, and limit plates are arranged on both sides of the first swing rod, and both sides of the limit plates are fixedly welded to the inner wall of the outer shell and the inner shell respectively. The utility model cooperates with the components such as the sliding rod, the extrusion plate and the elastic spring arranged on the limit plate, so that when the valve spring rotates and drives the first swing rod to swing up and down, when the first swing rod rotates to contact the extrusion plate, the first swing rod can touch the power switch through the extrusion plate regardless of any position of the up and down swinging. This solves the problem that it is not only difficult for the first swing rod to accurately squeeze the power switch during the up and down swinging process, but also that it may hit the outer wall of the power switch during the swinging process, thereby damaging the power switch.

[0004] This method of stopping rotation is too expensive and too large. First, the two inner and outer circles increase the size of the structure. For some compact engines, the outer shells may offset each other, making it difficult to install. Second, it requires the installation of micro switches, electromagnetics, permanent magnets and other structures, which greatly increases production costs and power consumption. It is not energy-saving and environmentally friendly, and the assembly and processing of the large number of parts are cumbersome. The high temperature of the engine may cause the permanent magnet to demagnetize, thus affecting the subsequent resetting work. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a valve spring anti-rotation structure to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve spring anti-rotation structure, including a sleeve and a valve spring body, a limiting sleeve is placed on one side of the sleeve, a support frame is fixed on the other side of the sleeve, a slot is opened on one side of the bottom of the sleeve, a fixed seat is connected to one side of the valve spring body, and a spring sheet is passed through one side of the fixed seat.

[0007] By adopting the above technical solution, the valve spring body is limited by the limit sleeve to avoid horizontal displacement of the valve spring body. When the valve spring body rotates, it drives the fixed seat to rotate. At this time, the fixed seat and the support frame are abutted to avoid the valve spring body from rotating too much. In the process of rotation of the valve spring body, the spring sheet will be bent by force. When the valve spring body is no longer rotated by force, the spring sheet releases the force to restore to a straight state. At the same time, the spring sheet applies force to the valve spring body to reverse and reset the valve spring body.

[0008] Furthermore, the shrapnel is made of high-quality alloy steel wire.

[0009] By adopting the above technical solution, the material is the same as that of the valve spring body, has good elasticity and fatigue life, and can meet the high-speed, high-temperature and high-frequency working requirements of the felt group.

[0010] Furthermore, the fixing seat is in contact with a support frame, and two support frames are provided, and the two support frames are arranged in a mirror image.

[0011] By adopting the above technical solution, when the valve spring body rotates, the fixing seat is driven to rotate. At this time, the fixing seat and the abutment frame are abutted against each other, thereby preventing the valve spring body from rotating too much.

[0012] Furthermore, the spring piece is slidably connected to the slot.

[0013] By adopting the above technical solution, the spring sheet will be bent by force during the rotation of the valve spring body. When the valve spring body is no longer rotated by force, the spring sheet releases the force to restore to a straight state. At the same time, the spring sheet applies force to the valve spring body to reverse and reset the valve spring body.

[0014] Furthermore, the fixing seat is fixedly connected to the valve spring body by means of strong glue or welding.

[0015] By adopting the above technical solution, during assembly, the staff places the fixing seat on the end of the valve spring body, and then fixes the fixing seat to the end of the valve spring body by super glue or welding.

[0016] Furthermore, the spring piece is fixedly connected to the fixing seat by means of strong glue or welding.

[0017] By adopting the above technical solution, the staff inserts the spring piece into the fixing seat and fixes it by strong glue or welding, thereby completing the connection between the spring piece and the fixing seat.

[0018] Furthermore, the valve spring body is located inside the limiting sleeve.

[0019] By adopting the above technical solution, it is ensured that the valve can fit tightly with the valve seat or valve seat ring when closed, and overcome the inertia force generated by the valve mechanism when the valve is opened, so that the transmission parts are always controlled by the cam and do not separate from each other.

[0020] Furthermore, three spring pieces are provided, and the three spring pieces are equidistantly distributed.

[0021] By adopting the above technical solution, the number of spring sheets is increased, thereby increasing the rebound force, so as to drive the valve spring body to reverse and reset.

[0022] In summary, the utility model mainly has the following beneficial effects:

[0023] The utility model uses the setting of a limit sleeve, a support frame, a fixed seat, a spring piece and a slot to limit the valve spring body through the limit sleeve to avoid horizontal displacement of the valve spring body. When the valve spring body rotates, the fixed seat is driven to rotate. At this time, the fixed seat and the support frame are resisted, thereby preventing the valve spring body from rotating too much. In the process of rotation of the valve spring body, the spring piece will be bent by force. When the valve spring body is no longer rotated by force, the spring piece releases the force to restore the straight state. At the same time, the spring piece applies force to the valve spring body to reverse and reset the valve spring body. The size is not very large, which is convenient for application to different engines. The utility model has a simple structure, low cost, no need for electricity, energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Figure 3 It is a schematic diagram of the top-sectional structure of the utility model;

[0027] Figure 4 It is a schematic diagram of the explosion structure of the utility model.

[0028] In the figure: 1. sleeve; 2. valve spring body; 3. limit sleeve; 4. support; 5. fixing seat; 6. spring piece; 7. slot. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0030] The following describes an embodiment of the utility model based on its overall structure.

[0031] Embodiment 1:

[0032] A valve spring anti-rotation structure, such as Figure 1-Figure 4 As shown, it includes a sleeve 1 and a valve spring body 2, a limiting sleeve 3 is placed on one side of the sleeve 1 to limit the valve spring body 2 to prevent the valve spring body 2 from horizontal displacement; a support frame 4 is fixed on the other side of the sleeve 1, a fixing seat 5 is abutted against the support frame 4, two support frames 4 are provided, and the two support frames 4 are mirror-imaged, and the fixed seat 5 abuts against the support frame 4, so as to prevent the valve spring body 2 from rotating too much; a slot 7 is provided on one side of the bottom of the sleeve 1, a fixing seat 5 is connected to one side of the valve spring body 2, the fixing seat 5 is fixedly connected to the valve spring body 2 by means of strong glue or welding, a spring piece 6 is passed through one side of the fixing seat 5, the spring piece 6 is fixedly connected to the fixing seat 5 by means of strong glue or welding, the spring piece 6 is made of high-quality alloy steel wire, and the spring piece 6 is slidably connected to the slot 7, and the spring piece 6 will be bent under force during the rotation of the valve spring body 2. When the valve spring body is no longer rotated under force, the spring piece 6 releases the force to restore the straight state, and at the same time, the spring piece 6 applies force to the valve spring body 2 to reverse and reset the valve spring body 2.

[0033] See also Figure 1-Figure 4 In the above embodiment, the valve spring body 2 is located inside the limiting sleeve 3, ensuring that the valve can fit tightly with the valve seat or valve seat ring when the valve is closed, and overcome the inertia force generated by the valve mechanism when the valve is opened, so that the transmission parts are always controlled by the cam and do not separate from each other.

[0034] Embodiment 2:

[0035] On the basis of the above-mentioned embodiment 1, in order to make it easier to reset the valve spring body 2, the following configuration is adopted.

[0036] See also Figure 3 and Figure 4 In the above embodiment, three spring pieces 6 are provided, and the three spring pieces 6 are equidistantly distributed. By increasing the number of spring pieces 6, the rebound force is increased, so as to drive the valve spring body 2 to reverse and reset.

[0037] The implementation principle of the utility model is as follows: first, during assembly, the staff places the fixing seat 5 on the end of the valve spring body 2, and then the staff fixes the fixing seat 5 and the end of the valve spring body 2 by strong glue or welding, and then the staff inserts the spring piece 6 into the fixing seat 5 and fixes it by strong glue or welding. After the valve spring body 2 is assembled, the staff bends the spring piece 6 and then puts the valve spring body 2 into the sleeve 1, and then the staff inserts the bent spring piece 6 into the slot 7. At this time, the spring piece 6 loses pressure and bounces back to a straight state, and then the staff puts the limiting sleeve 3 into the sleeve 1. The sleeve 1 can be detachably connected to the sleeve 1 by buckles, bolts and other structures to facilitate the replacement of the valve spring body 2;

[0038] The valve spring body 2 is limited by the limiting sleeve 3 to prevent the valve spring body 2 from horizontal displacement. When the valve spring body 2 rotates, the fixing seat 5 is driven to rotate. At this time, the fixing seat 5 is abutted against the support frame 4, thereby preventing the valve spring body 2 from rotating too much. In the process of the rotation of the valve spring body 2, the spring piece 6 will be bent by force. When the valve spring body is no longer rotated by force, the spring piece 6 releases the force and returns to a straight state. At the same time, the spring piece 6 applies force to the valve spring body 2 to reverse and reset the valve spring body 2.

[0039] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A valve spring anti-rotation structure, comprising a sleeve (1) and a valve spring body (2), characterized in that: A limiting sleeve (3) is placed on one side of the sleeve (1), a support frame (4) is fixed on the other side of the sleeve (1), a slot (7) is provided on one side of the bottom of the sleeve (1), a fixing seat (5) is connected to one side of the valve spring body (2), and a spring sheet (6) is passed through one side of the fixing seat (5).

2. The valve spring anti-rotation structure according to claim 1, characterized in that: The spring piece (6) is made of high-quality alloy steel wire.

3. The valve spring anti-rotation structure according to claim 1, characterized in that: The fixing seat (5) is in contact with the abutment frame (4), and two abutment frames (4) are provided, and the two abutment frames (4) are arranged in a mirror image.

4. The valve spring anti-rotation structure according to claim 2, characterized in that: The spring sheet (6) is slidably connected to the slot (7).

5. The valve spring anti-rotation structure according to claim 3, characterized in that: The fixing seat (5) is fixedly connected to the valve spring body (2) by means of strong glue or welding.

6. The valve spring anti-rotation structure according to claim 4, characterized in that: The spring piece (6) is fixedly connected to the fixing seat (5) by means of strong glue or welding.

7. The valve spring anti-rotation structure according to claim 1, characterized in that: The valve spring body (2) is located inside the limiting sleeve (3).

8. The valve spring anti-rotation structure according to claim 1, characterized in that: The number of the spring pieces (6) is three, and the three spring pieces (6) are equidistantly distributed.

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