WO2001061200A1 - A loose-proof washer - Google Patents

Abstract

A loose-proof washer for fastening a bolt includes an annular body portion which comprises a plurality of inner teeth on its inner margin, wherein said inner teeth extend radially inwardly and project axially in one direction, which is designed such that when the washer is pressed to be flattened by a force, the inside diameter of the teeth is less than the outside diameter of the bolt, and the teeth are radially forced to interwedge in the thread of the bolt.

Description

 TECHNICAL FIELD

 The invention relates to an anti-loose washer used as a fastener. Background technique

 The anti-bolt loose washers currently in use mainly include GB93-97 standard spring washers, GB861.1-87 internal tooth lock washers, etc. They have the disadvantage that the anti-loosing performance needs to be further improved, among which spring washers are not stressed. Balanced, internal toothed lock washers should not be used for weaker materials and should not be removed often. Summary of invention

 In view of the shortcomings of the spring washer and the internal-tooth lock washer, the object of the present invention is to provide an anti-loosing washer with better anti-loosing performance, balanced force, not restricted by weaker materials, and which can be frequently disassembled. According to the anti-loosening washer of the present invention, the inner circle has internal teeth, the internal teeth are radially extended and axially lifted, and the inner diameter formed by the expansion under pressure is smaller than the outer diameter of the bolt, and is forced to be clamped radially On the bolt.

 According to a preferred embodiment, at least two uniformly distributed internal warped teeth also have the same helix angle as the mating bolt thread, and the inner diameter formed by the expansion under pressure is smaller than the outer diameter of the bolt thread groove, and is forced. Snap into the thread groove.

Beneficially, the produced incisor teeth can also be made elastic. Two to multiple washers are stacked in the same direction. It has the performance of a combination of a self-tightening nut and a spring washer. There may also be appropriate spacing between the internally raised teeth. It is also possible to make stop lugs on the outside of the washer. By using the anti-loosening washer of the present invention, uniformly distributed radially-outwardly raised and axially warped internally warped teeth have both axial elasticity and overcome the uneven force of the spring washer, while increasing Radial clamping on bolts or thread grooves provides more effective anti-loosening performance. Radial clamping on bolts also overcomes the disadvantages of internal toothed lock washers that are not suitable for weak materials and should not be dismantled often.

 One piece of the anti-loosening washer of the present invention has the functions of flat, spring, and internal tooth locks, and saves the occupied space, especially when two or more pieces are stacked in the same direction, which overcomes the spring and internal tooth locks. Tight washers are not suitable for stacking, and have the performance of the combination of self-tightening nuts and spring washers. This is a feature not available in other anti-loosening washers. There are no self-tightening screws for self-tightening nuts, which eliminates the hidden danger of loosening screws. , Has a reliable anti-loose effect, and is easy to dismantle, making it simpler. BRIEF DESCRIPTION OF THE DRAWINGS

 Figure 1 is a front view of a loosening washer;

 FIG. 2 is a left side view and A-A cross-sectional view of FIG. 1; FIG.

 FIG. 3 is an expanded view of B in FIG. 1;

 FIG. 4 is a front view of an anti-loose washer having a helix angle on the inner warped teeth; FIG.

 Fig. 5 is a left side view and a C-C sectional view of Fig. 4:

 FIG. 6 is an expanded view at B in FIG. 4;

 7 is a front view of another toothed anti-loose washer;

 FIG. 8 is a left side view and an E-E cross-sectional view of FIG. 7; FIG.

 FIG. 9 is an expanded view at F in FIG. 7;

 10 is a front view of another anti-loose washer;

 11 is a left side view and a G-G cross-sectional view of FIG. 10;

 FIG. 12 is a development view at H in FIG. 10. Detailed description of the preferred embodiment

 The embodiments of the present invention will be further described below with reference to the drawings.

A kind of anti-loosening washer as shown in Figure 1, Figure 2, and Figure 3 The internally tilted teeth that are raised in the same direction in the axial direction are elastic. The central hole formed by the internally tilted teeth under pressure must be smaller than the outer diameter of the bolt, and is forced to be clamped radially on the bolt, which is relatively non-rotatable with the bolt. At the same time, it has axial elastic stress to achieve a more reliable anti-loose effect.

 Figures 4, 5, and 6 show the anti-loosening washer with the helix angle of the internal warpage teeth. The uniformly distributed internal warpage teeth that extend radially and rise in the same direction in the axial direction are elastic and have the same thread as the mating bolts. At the same helix angle, the central hole formed by the internally tilted teeth under pressure must be smaller than the minimum outer diameter of the thread, and is forced to be clamped radially in the thread groove, and will not be caught on the thread. Especially when two or more pieces are stacked in the same direction, it has the combination performance of self-tightening nut and spring washer.

 As shown in Figures 7, 8, and 9, there is another tooth-shaped anti-loose washer. The internal warped teeth also have a certain internal tooth lock washer performance after compression and expansion. This tooth profile may also have the same helix angle as the mating thread.

 Figure 10, Figure 1 and Figure 12 show another toothed anti-loose washer. This form is conducive to increasing strength and is suitable for matching with countersunk bolts. Industrial applicability

 The anti-loosing washer of the present invention has the functions of flat, spring and internal tooth lock at the same time, saves the occupied space, has a reliable anti-loosening effect, is convenient for frequent disassembly, and is simpler to manufacture.

Claims

Rights request 1. An anti-loosening washer, wherein the inner circle of the washer has internal teeth, which is characterized in that the internal teeth protrude radially and axially lift up, and an internal diameter formed by spreading under pressure is smaller than an outer diameter of a bolt, and is Force radial clamping on the bolt. 2. The anti-loosing washer according to claim 1, characterized in that at least two uniformly distributed internal warped teeth also have the same helical angle as the thread of the mating bolt, and are forced to be clamped radially in the thread groove at the thread. . 3. The anti-loosening washer according to claim 1 or 2, characterized in that the inward warped teeth have elasticity.