Anti-loosening disc spring

Abstract

The utility model discloses an anti-loosening disc spring which is a chamfered-edge conical elastic gasket, commonly known as a chamfered-edge disc spring (13) and comprises a conical gasket, a ring top (12) is smaller than a ring bottom (14), the ring top (12) and the ring bottom (14) are circular, the circle center of the ring top (12) and the circle center of the ring bottom (14) are connected through a coaxial line (21), the diameter of the ring top (12) is larger than that of a screw rod (4), and the diameter of the ring bottom (14) is larger than that of the ring top (12). The shaft (21) is perpendicular to the collar top (12) and the collar bottom (14). The disc spring is characterized in that the round edge of the ring bottom (14) is provided with at least one chamfered round flaw arch door (24), or a guide chamfered arch door (25) is chamfered to form an asymmetric chamfered disc spring (26), and the disc spring creeps in one direction and is self-tightened and prevented from loosening during vibration. The axial section line of the outer conical surface (15) is in a straight line shape (23), or in an outward convex arc shape (19), or in an inward convex arc shape (20). The anti-loose disc spring (11) is simple in structure, easy to produce, low in cost, good in anti-loose performance, convenient to install and capable of being used repeatedly.

Description

Technical Field

[0001] The utility model relates to the field of anti-loosening fasteners, in particular to an anti-loosening disc spring, which is an asymmetric conical elastic washer. This anti-loosening disc spring is also called a "cut-edge disc spring" according to its shape characteristics. Background Art

[0002] Existing disc springs are either conical or spherical, and are constructed by pairing two conical spring washers. German Patent DE2804213A1 discloses two conical spring washers with axial steps, ensuring coaxial positioning when stacked. Alternating washers in the stack have internal and external positioning steps, radially locating the straight inner or outer edges of adjacent washers. These conical spring washers are used in pairs and are coaxially symmetrical. In a fastener threaded pair, for example, after a bolt's shank passes through two screw holes, the exposed screw threads are threaded onto the paired disc spring washers, and the matching nut is screwed on. Because the disc spring washers are symmetrical about the bolt axis, with their top and bottom coils parallel, when the threaded pair is vibrating, the nut will quickly loosen, regress, and eventually become loose as the lateral vibration of the two fasteners intensifies, effectively defeating its anti-loosening function.

[0003] The existing patent invented by myself with publication number CN116989052A discloses an anti-loosening washer which is an eccentric conical elastic washer, commonly known as a "skewed disc spring". The characteristics are: the line connecting the center of the circle top and the center of the circle bottom is eccentric, the circle top and the circle bottom are not coaxial, and the angle between the axis of the circle bottom and the eccentric axis is 0° to 90°. When processing this asymmetric skewed disc spring with an eccentric structure, such as when stamping an eccentric washer, the upper mold and the lower mold must be precisely aligned, otherwise the mold will be easily damaged and the service life of the mold will be greatly shortened compared to the concentric conical washer, thereby increasing production costs and maintenance costs. Utility Model Content

[0004] In order to overcome the shortcomings of the above-mentioned prior art, this case aims to provide an anti-loosening disc spring with low production cost and mold maintenance cost, and which can also play a good anti-loosening role in vibration conditions.

[0005] The anti-loosening disc spring described in this case is a conical elastic washer with an asymmetrical bottom ring and an upper ring coaxial with the bottom ring, commonly known as a "chamfered edge disc spring". It includes a conical washer, the plane of the ring top and the plane of the ring bottom are parallel to each other, the ring top and the ring bottom are both circular and coaxial, the line connecting the center of the circle of the ring top and the center of the circle of the ring bottom is the axis of the anti-loosening disc spring, and the axis of the ring top and the axis of the ring bottom are coaxial; the diameter of the ring top is larger than the diameter of the bolt screw, the diameter of the ring bottom is larger than the diameter of the ring top, and the axis is perpendicular to the ring top and the ring bottom; it is characterized by:

[0006] The bottom circular edge of the ring has at least one circumferentially arranged chamfered circular notch with a small portion cut off, thereby forming an asymmetric chamfered disc spring with the same creeping direction.

[0007] The height of the chamfered circular notch is 1 / 10 to 1 / 2 of the height of the anti-loosening disc spring, including 1 / 10 or 1 / 2.

[0008] Preferably, the removed chamfered circular notch is 1 / 4 to 1 / 5 of the height of the anti-loosening disc spring, including 1 / 4 or 1 / 5;

[0009] The same side of the chamfered circular notch is further cut off with a smaller leading chamfer, so that the vibration creep direction is the self-tightening direction, forming an asymmetric chamfered disc spring. When vibrating, the chamfered disc spring unidirectionally creeps and tightens itself.

[0010] The chamfered disc spring is an asymmetric chamfered disc spring, and the cut parts include a pointed notch and a bald notch. The bald notch and the pointed notch are arranged clockwise or counterclockwise to meet the need for unidirectional creep self-tightening of the chamfered spring when the nut thread vibrates in different rotation directions.

[0011] The wall thickness of the anti-loosening disc spring is the thickness between the outer cone surface and the inner cone surface, which are the same thickness;

[0012] The anti-loosening disc spring is made of elastic metal or non-metal pressed;

[0013] The anti-loosening disc spring has an outer conical surface whose axial section line is a straight line, or an outward convex arc line, or an inward convex arc line.

[0014] The anti-loosening disc spring described in this case, that is, the chamfered conical elastic washer, when used in an anti-loosening threaded pair, is to insert the screw rod at the other end of the bolt head into the screw holes of the upper and lower fasteners respectively, and the chamfered conical elastic washer described in this case, that is, the chamfered disc spring, is inserted into the exposed screw rod. Except for the cut-off circular notch, its bottom ring is tightly attached to the surrounding surface of the screw hole of the upper fastener, its inner ring is sleeved on the screw rod, and its top ring is tightly attached to the plane of the nut ring, pre-tightening the nut spirally threaded on the bolt, compressing the chamfered conical elastic washer, that is, the chamfered disc spring, between the nut and the upper fastener until the chamfered disc spring is flattened, thereby pre-tightening the threaded pair.

[0015] The working principle of the anti-loosening disc spring described in this case is: after the nut is pre-tightened, the pre-tightening force obtained on the side of the anti-loosening disc spring with greater elasticity, that is, the opposite side of the cut circle, will be much greater than the pre-tightening force on the cut circle side, that is, the pre-tightening force on the left and right sides of the anti-loosening disc spring in this case is asymmetrical, and the pre-tightening force on the right side is much greater than the pre-tightening force on the left side. Since the pre-tightening force on the right side is large, the elastic force on the right side of the circular ring plane of the nut is large, and the elastic force on the left side of the circular ring plane of the nut is small; or vice versa, the force on the left and right sides of the nut is uneven, causing the nut threads and the bolt external threads that were originally parallel to each other to mesh. They are inclined and crossed with each other and pried against each other, and the inner thread of the nut is tilted on the outer thread of the screw due to a small gap, and the nut is locked in one-way rotation due to the elastic force of the anti-loosening disc spring and the tilting effect. The side of the circular ring plane of the nut with greater elastic force makes the inner thread of the nut clamp the outer thread of the bolt, so that the nut can only be tightened but not loosened, thereby playing a role in preventing retreat and loosening; on the other hand, the nut is twisted with a certain pre-tightening force, so that after the nut is pre-tightened, this will prevent the nut from continuing to vibrate and pre-tighten in the pre-tightening direction, and the nut cannot be rotated in both the left and right spiral directions, so that the thread pair plays a role in preventing loosening.

[0016] Or the working principle of the anti-loosening disc spring can be explained like this: because the anti-loosening disc spring has one or more circular edges cut off, the elastic force on the left and right sides of the pre-tightened cut edge disc spring is uneven. After the nut and the bolt are pre-tightened, the expanded thread formed by the nut on the bolt with high sides and low sides is a sawtooth corrugation meshing and tightening, and the bolt and the nut are oblique sawtooth corrugation peaks and valleys, meshing. After tightening, the friction coefficient of the sawtooth wave thread between the bolt and the nut tends to infinity as the pre-tightening force increases. The friction between the two sawtooth wave threads of the bolt and the nut is quite large, and there cannot be any misalignment or loosening, thereby achieving the purpose of preventing loosening.

[0017] If a small, notched guiding edge is added just in front of the spiral direction of the chamfered disc spring's notched edge, the guiding edge will guide the disc spring's rotational direction during vibration. When the thread pair vibrates axially and laterally, the anti-loosening disc spring will be compressed and stretched, causing the notched edge to peristaltically rotate at the vibration frequency, driving the notched disc spring clockwise. The thread here is a positive thread, and the notched disc spring, through rotational friction, drives the nut to also rotate intermittently clockwise, automatically tightening the thread pair with each vibration. At this point, the ratio of residual axial force to initial preload will approach 100%, or slightly exceed 100%. Similarly, the reverse is true for reverse threads. This further enhances the anti-loosening performance and achieves a better anti-loosening effect.

[0018] It can be seen from this that the anti-loosening disc spring described in this case, that is, the chamfered disc spring, does not require replacement or change of the original bolts, nuts, and upper and lower fastener structures. It is only necessary to use the chamfered disc spring in this case between the nut and the upper fastener. Compared with the existing symmetrical disc springs, it can achieve the purpose of significantly improving the anti-loosening performance after pre-tightening vibration. Its structure is simple and material-saving, easy to use, and its anti-loosening performance is far better than that of an existing pair of symmetrical disc springs. It only uses an asymmetrical conical elastic washer, that is, the chamfered disc spring, which saves half of the cost. It is also easy to disassemble and can be reused.

[0019] Compared with the crooked disc spring, the chamfered disc spring described in this case adopts a coaxial structure of the top ring and the bottom ring, which makes the processing technology simpler, saves the cost of complex molds and high maintenance costs, extends the service life of the mold, and greatly reduces the processing, production and maintenance costs. The anti-loosening disc spring with rounded edges produced can be laser cut into a chamfered flat washer blank and then pressed into a cone shape; it can also be directly stamped into shape in one step. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of the first embodiment of the anti-loosening disc spring of the utility model;

[0021] Figure 2 yes Figure 1 Top view;

[0022] Figure 3 yes Figure 1 oblique view;

[0023] Figure 4 This is a front view of the second embodiment of the anti-loosening disc spring of the present invention;

[0024] Figure 5 yes Figure 4 Top view;

[0025] Figure 6 yes Figure 4 oblique view;

[0026] Figure 7 This is a front view of the third embodiment of the anti-loosening disc spring of the present invention;

[0027] Figure 8 yes Figure 7 Top view;

[0028] Figure 9 yes Figure 7 oblique view;

[0029] Figure 10 This is a front view of the fourth embodiment of the anti-loosening disc spring of the present invention;

[0030] Figure 11 yes Figure 10Top view;

[0031] Figure 12 yes Figure 10 oblique view;

[0032] Figure 13 This is a front view of the fifth embodiment of the anti-loosening disc spring of the present invention;

[0033] Figure 14 yes Figure 13 Top view;

[0034] Figure 15 yes Figure 13 oblique view;

[0035] Figure 16 This is a front view of the sixth embodiment of the anti-loosening disc spring of the present invention;

[0036] Figure 17 yes Figure 16 Top view;

[0037] Figure 18 yes Figure 16 oblique view;

[0038] Figure 19 yes Figures 7-9 Schematic diagram of the anti-loosening thread pair assembly.

[0039] In the picture:

[0040] 1. Nut 2. Bolt

[0041] 3. Bolt head 4. Screw

[0042] 5. Bolt outer thread 6. Nut inner thread

[0043] 7. Nut ring plane 8. Upper fastener

[0044] 9. Lower fastener 10. Screw hole

[0045] 11. Anti-loose butterfly spring 12. Ring top

[0046] 13. Chamfered tapered elastic washer, also known as "Chamfered disc spring"

[0047] 14. Ring bottom 15. Outer cone

[0048] 16. Inner cone surface 17. Right cone side

[0049] 18. Left cone side 19. Convex arc shape

[0050] 20. Inward convex arc 21. Axis

[0051] 22. Gap between the inner thread of the nut and the outer thread of the bolt

[0052] 23. Straight line 24. Chamfered edge and rounded shape

[0053] 25. Guided chamfered edge 26. Asymmetric chamfered edge disc spring

[0054] 27. Pointed missing 28. Bald missing DETAILED DESCRIPTION

[0055] The present invention will now be further described with reference to the accompanying drawings and embodiments:

[0056] This utility model Figure 19 The anti-loosening disc spring 11 described in the specification is specifically a chamfered conical elastic washer, namely the "chamfered disc spring" 13, which is an asymmetric disc spring washer. The utility model only uses an asymmetric disc spring, which is arranged between the nut 1 and the upper fastener 8. Since one side of the chamfered disc spring 13 is high and the other side is low on the left and right sides, one side of the nut 1 after pre-tightening has a large supporting force due to the support on the high side of the chamfered disc spring 13, and the other side of the nut 1 has a small supporting force due to the low side of the chamfered disc spring 13, so that the left and right sides of the nut 1 are unevenly stressed and tilted. The inner thread 6 of the nut spiraled on the outer thread 5 of the bolt is locked together at any rotation angle after pre-tightening due to the tilting, and cannot be reversed or loosened, thereby playing an anti-loosening role. Figures 1 to 18 Any chamfered conical elastic washer, i.e., the "chamfered disc spring" 13, has the same anti-loosening principle, so examples are not given one by one.

[0057] Or the working principle of the anti-loosening disc spring 11 can be explained in this way: because the anti-loosening disc spring 11 removes one or more chamfered circular notches 24, the elastic force on the left and right sides of the pre-tightened chamfered disc spring 13 is uneven. After the nut 1 and the bolt 2 are pre-tightened, the expanded thread formed by the nut 1 on the bolt 2 with high sides and low sides is a sawtooth corrugation meshing and tightening, and the bolt 2 and the nut 1 are oblique sawtooth corrugation peaks and valleys, meshing. After tightening, the friction coefficient of the sawtooth wave thread between the bolt 2 and the nut 1 tends to infinity as the pre-tightening force increases. The friction between the two sawtooth wave threads of the bolt 2 and the nut 1 is quite large, and there cannot be any misalignment or loosening, thereby achieving the purpose of preventing loosening.

[0058] If a small guiding chamfer 25 with a small cut-off circular notch is added to the spiral direction of the chamfered disc spring 13, the guiding chamfer 25 guides the rotation direction of the chamfered disc spring 13 during vibration. When the thread pair vibrates axially and laterally and the anti-loosening disc spring 11 is compressed and stretched, the guiding chamfer 25 rotates intermittently at the vibration frequency in a cocoon-like manner, driving the chamfered disc spring 13 to rotate clockwise. Here, the thread of the nut 1 is a positive thread, and the chamfered disc spring 13 drives the positive thread nut 1 to rotate clockwise through rotational friction, automatically vibrating and tightening, making the thread pair tighter with each vibration. At this time, the ratio of the residual axial force to the initial preload will be close to 100%, or slightly exceed 100%. Similarly, the opposite is true for the anti-loosening thread. This further enhances its anti-loosening performance and makes the anti-loosening effect better.

[0059] The terms "top", "bottom", "big", "small", "inside", "outside", "left", "right", "high", "low", "forward", "reverse" and so on used in the present invention to indicate directions, areas, positions or aspects are based on the directions, areas, positions or directions shown in the accompanying drawings. They are only used to facilitate the description of the present invention and simplify the description. In actual applications, the directions, positions or directions can be interchanged and reversed. They do not indicate or imply that the device or part referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention. The terms "installation" and "connection" should be understood in a broad sense. For example, an integrated connection can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

[0060] Figures 1 to 3 In the figure, an anti-loosening disc spring 11 is a chamfered conical elastic washer, namely a "chamfered disc spring" 13. The top 12 of the ring is circular, and the bottom 14 of the ring is also circular. The circular top 12 and the circular bottom 14 are coaxial, and the line connecting the center of the circle of the ring top 12 and the center of the circle bottom 14 is the axis 21. The axial section line of the outer conical surface 15 of the anti-loosening disc spring 11 is a straight line 23, and the axial section line of the inner conical surface 16 is also a straight line 23. The thickness between the outer conical surface 15 and the inner conical surface 16 is uniform and equal. In the figure, the right conical side 17 and the left conical side 18 are at the same height, and the right conical side 17 and the left conical side 18 have the same taper. The diameter of the bottom ring 14 is larger than that of the top ring 12, and the axis 21 is perpendicular to the ring top 12 and the ring bottom 14. It is characterized in that the edge of the ring bottom 14 has at least one cut-off chamfered circular notch 24, forming an asymmetric chamfered disc spring 13. Figure 1 The right half of the figure is a cross-sectional view. Figure 1The left half of the figure is the left half of the front view. When the anti-loosening disc spring 11 is squeezed up and down, the compression thickness on the right side is smaller than that on the left side, and the rebound force on the right side is greater than that on the left side. The uneven elastic force on both sides causes the nut inner thread 6 above the ring top 12 to tilt on the bolt outer thread 5. This causes the gap 22 between the nut inner thread and the bolt outer thread to tilt and be unevenly stressed, tightly locking the pre-tightened nut 1 on the screw rod 4 of the bolt 2, preventing it from rotating or loosening. Conversely, when the nut 1 and bolt 2 vibrate and rotate in the other direction, they can only be tightened by the vibration, thus achieving an anti-loosening effect.

[0061] Figures 4-6 In the figure, except that a small chamfer is added to the bottom ring 14 to guide the chamfer 25, the difference is that after the guide chamfer 25 is added, the chamfered disc spring 13 is fixed in a one-way rotation in a free loose state during vibration, and the anti-loosening disc spring 11 is compressed and automatically recovers its extension at a certain frequency, and rotates in a cocoon-like manner around the axis 21, so that the one-way chamfered disc spring 13 vibrates and automatically tightens in the direction of the nut 1 tightening, and the more it vibrates, the tighter it becomes. The vibration causes the elastic force of the chamfered disc spring 13 between the nut 1 and the upper fastener 8 to not be fully stretched and released, but is always suppressed by the vibrating nut 1 and the upper fastener. The other structures are the same Figures 1 to 3 The same principle is also the same, so I will not go into details here.

[0062] Figures 7-9 In the embodiment, the axial section line of the outer conical surface 15 of the anti-loose disc spring 11 is an outward convex arc 19, that is, the outer conical surface 15 is an outward convex arc 19, and the inner conical surface 16 is an outward convex arc. Figures 1 to 3 Same, the principle is the same.

[0063] Figures 10-12 In addition to the anti-loose disc spring 11 outer conical surface 15 axial section line is an inward convex arc 20, that is, the outer conical surface 15 is an inward convex arc 20, the inner conical surface 16 is an inward convex arc, the other structures are the same Figures 4-6 Same, the principle is the same.

[0064] Figures 13-15 In the embodiment, there is an asymmetric chamfered disc spring 26, which has at least one edge and can be multiple edges around the same periphery. Here, only two circular arrangements are shown. The edge of the ordinary disc spring is dug out with one end pointed and the other end bald. The bald end 28 and the pointed end 27 are arranged clockwise, and the creep self-tightening direction is consistent. The anti-loosening working principle is the same as Figures 4-6 、 Figures 10-12 Similarly, it is used for self-tightening and anti-loosening of reverse thread pairs.

[0065] Figures 16-18In the middle, the asymmetric chamfered disc spring 26 has at least one circumferentially arranged pointed tip in the same direction. The edge of the ordinary disc spring is dug out to make one end bald and the other end pointed. The bald notch 28 and the pointed notch 27 are arranged counterclockwise and the creep direction is consistent during vibration. Its anti-loosening working principle is the same as Figures 13-15 Same as the previous one, except that the direction of automatic creep tightening is opposite. It is used for automatic creep tightening of positive thread pairs under vibration.

[0066] In addition, a round protrusion with a pointed end and a bald end can be added outside the periphery of the ordinary disc spring to form an asymmetrical convex-edge disc spring, and its working principle is the same as 13 to 18.

[0067] The pointed notch 27 is a notch with a pointed head, and the bald notch 28 is a notch with a relatively bald head relative to the pointed notch 27. The pointed notch 27 and the bald notch 28 together form a chamfered notch 24 with one end larger and the other smaller. The outer edge of the chamfered notch 24 forms a portion of the circumference of the anti-loosening disc spring 11, while the inner edge of the chamfered notch 24 is an asymmetrical chamfer of arbitrary shape.

[0068] Due to the use of the asymmetrically chamfered disc spring 26, the chamfered disc spring 13 can effectively creep and tighten during vibration. Therefore, the anti-loosening performance of the present invention is superior to that of existing disc springs. It not only can prevent loosening asymmetrically, but also can creep and tighten, providing a double anti-loosening effect. In addition, the chamfered disc spring 11 can be made lighter after the edge is removed, saving materials and reducing costs.

[0069] Figures 1 to 18 In the embodiment, the line connecting the center of the circle top 12 and the center of the circle bottom 14 is the axis of the anti-loosening disc spring, the axis of the circle top 12 and the axis of the circle bottom 14 are coaxial 21, and the axis 21 is perpendicular to the circle top 12 and the circle bottom 14. The anti-loosening disc spring 11 is symmetrical in taper before use, and has different elastic forces on the left and right sides during use. The diameter of the circle top 12 is larger than the diameter of the bolt 2 and the screw 4, and the diameter of the circle bottom 14 is larger than the diameter of the circle top 12. At least one chamfered circular notch 24 is cut off from the circle bottom 14, and the height of the chamfered circular notch 24 is 1 / 10 to 1 / 2 of the height of the anti-loosening disc spring, such as 1 / 10, or 1 / 8, or 1 / 6, or 1 / 4, or 1 / 3, or 1 / 2; preferably, the cut chamfered circular notch 24 is 1 / 4 to 1 / 5 of the height of the anti-loosening disc spring 11, including 1 / 4 or 1 / 5.

[0070] Figures 4-6 , Figures 10-12 In the embodiment, the circular notch leading to the chamfered edge 25 is smaller than the circular notch leading to the chamfered edge 24, and the circular notch leading to the chamfered edge 25 and the circular notch leading to the chamfered edge 24 are on one side of the area of ​​the anti-loose butterfly spring 11 to ensure its asymmetry.

[0071] The wall thickness of the anti-loosening disc spring 11 is the same between the outer conical surface 15 and the inner conical surface 16 , and the anti-loosening disc spring 11 is made of elastic metal or non-metal pressed together.

[0072] Figure 19 In the present invention, a butterfly spring 11 is provided to prevent loosening. Figures 7-9 The application diagram of the assembly in the anti-loosening thread pair can also replace the anti-loosening butterfly spring 11 in the figure with Figures 1 to 3 ,or Figures 4-6 ,or Figures 10-12 ,or Figures 13-15 ,or Figures 16-18 The several chamfered conical elastic washers, or "chamfered disc springs" 13, described in the previous section, are inserted into the screw holes 10 of the lower fastener 9 and the upper fastener 8. The anti-loosening disc spring 11 of the present invention is then placed over the exposed outer thread 5 of the bolt. The bottom 14 of the ring contacts the surrounding surface of the screw hole 10 of the upper fastener 8, and the top 12 of the ring contacts the flat surface 7 of the nut ring, pre-tightening the nut 1. Installation is complete. Their structure and operating principle are the same as described above.

[0073] Another method of using the anti-loosening butterfly spring of the present invention is as follows: instead of using a nut, the screw rod 4 of the bolt 2 is inserted into the inner ring of the anti-loosening butterfly spring 11 of the present invention, the top of the ring 12 is close to the inner side of the bolt head 3, and the bottom of the ring 14 is in close contact with the surface around the screw hole 10 of the upper fastener 8, and the outer thread 5 of the bolt is screwed into the screw hole 10 with the inner thread of the lower fastener 9, pre-tightened, and the installation is completed. The installation method is simple and can be implemented by ordinary technicians according to the above description, so the figure is omitted.

[0074] The anti-loosening butterfly spring 11 described in this case is specifically a chamfered conical elastic washer, namely a "chamfered disc spring" 13. During production, we first use laser cutting to make a flat anti-loosening disc spring 11 blank, and then stamp it into a conical shape; or stamp out an asymmetric conical washer in one go, and then undergo heat treatment such as quenching, surface coating treatment, and strong pressure treatment for important disc springs. In order to ensure that the anti-loosening washer can work reliably, its material must not only meet the requirements of having a high strength limit and yield limit, but also a high elastic limit, fatigue limit, impact toughness, plasticity and good heat treatment processability. In practice, the most widely used is spring steel, and its varieties include carbon spring steel, low manganese spring steel, silicon manganese spring steel, chrome vanadium steel and stainless steel. The size of the chamfered edge, the diameter of the coil top and coil bottom, the thickness of the tapered surface, and the material selection of the anti-loosening disc spring must fully consider its purpose, importance, and the nature and size of the load it is subjected to, as well as its cyclic characteristics, operating temperature, surrounding medium, corrosion resistance, anti-magnetic properties, and other operating conditions, as well as factors such as processing, heat treatment, and economic efficiency, so that the selection result is consistent with the actual requirements. Its production process is the same as that of the disc spring, except that one or more edges of the coil bottom 14 are cut off during stamping. Due to the use of a symmetrical disc spring with an asymmetrical chamfered edge structure, the stamping production process and mold are simpler and the cost is low. The anti-loosening disc spring 11 has unequal circumferential elastic forces, i.e., one side has a greater elastic force and the other side has a smaller elastic force, which causes the nut 1 to tilt and lock onto the bolt 2, preventing it from loosening. This structure and principle are not well known to the public, and it has good anti-loosening performance, simple structure, and is also very convenient to use. It can be repeatedly disassembled and used without replacing the original bolt 2 and nut 1. Simply adding the anti-loosening disc spring 11 of the utility model can achieve the purpose of significantly preventing loosening, which has also been proven by experiments.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-loosening disc spring, comprising a conical washer, wherein the top (12) and the bottom (14) of the ring are both circular, the line connecting the center of the circle of the top (12) and the center of the circle of the bottom (14) is the axis (21) of the anti-loosening disc spring (11), and the axis of the top (12) and the axis of the bottom (14) are coaxial (21); the diameter of the top (12) is greater than the diameter of the bolt (2) and the screw (4), and the diameter of the bottom (14) is greater than the diameter of the top (12); the axis (21) is perpendicular to the top (12) and the bottom (14); and the characteristics are: The edge of the ring bottom (14) has at least one circumferentially arranged chamfered circular notch (24) with a small portion cut off, thereby forming an asymmetrical chamfered disc spring (13).

2. The anti-loosening disc spring according to claim 1, characterized in that: The height of the chamfered circular notch (24) is 1 / 10 to 1 / 2 of the height of the anti-loosening disc spring (11), including 1 / 10 or 1 / 2.

3. The anti-loosening disc spring according to claim 2, characterized in that: The height of the chamfered circular notch (24) is 1 / 4 to 1 / 5 of the height of the anti-loosening disc spring (11), including 1 / 4 or 1 / 5.

4. The anti-loosening disc spring according to claim 2, characterized in that: The same side of the chamfered circular notch (24) is further cut off with a smaller leading chamfered edge (25), so that the vibration creeping direction is the self-tightening direction, forming an asymmetric chamfered disc spring (13). When vibrating, the chamfered disc spring (13) creeps in one direction and tightens itself.

5. The anti-loosening disc spring according to claim 1, characterized in that: The wall thickness of the anti-loosening disc spring (11) is the thickness between the outer conical surface (15) and the inner conical surface (16), which are the same thickness.

6. The anti-loosening disc spring according to claim 1, characterized in that: The anti-loosening disc spring (11) is made of elastic metal or non-metal by pressing.

7. The anti-loosening disc spring according to claim 1, characterized in that: The axial section line of the outer conical surface (15) of the anti-loosening disc spring (11) is a straight line (23).

8. The anti-loosening disc spring according to claim 1, characterized in that: The axial section line of the outer conical surface (15) of the anti-loosening disc spring (11) is an outward convex arc line (19).

9. The anti-loosening disc spring according to claim 1, characterized in that: The axial section line of the outer conical surface (15) of the anti-loosening disc spring (11) is an inward convex arc line (20).

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