Mechanical anti-loosening device

Abstract

The utility model provides a mechanical anti-loose device, including stop lever, retainer ring, stop gear, stop sleeve, nut, screw, said stop sleeve is the integral structure of sleeve and gear ring, one end of stop sleeve is the sleeve, the other end is the gear ring, the sleeve is matched with nut, gear ring is matched with stop gear, stop gear is matched with stop lever. The locking device is reasonable in design and easy to implement, relative rotation of a thread pair is prevented by adopting a reliable mechanical device, and the effect of permanent locking and looseness prevention under the variable load condition can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a mechanical anti-loosening device. Background Art

[0002] Bolts and nuts are common mechanical parts used to fasten two parts. They are one of the main connection methods used in the mechanical field and are widely used. However, this connection method is prone to loosening during use, especially in a vibrating working environment. The nuts are more likely to loosen, resulting in insufficient tightening force and connection failure. To solve this problem, according to the basic principle of threaded connection anti-loosening, there are roughly three commonly used anti-loosening methods:

[0003] 1. Friction anti-loosening: This method increases the friction between the thread pair and the connected parts and between the thread pairs to prevent the relative rotation of the thread pair and prevent loosening. The methods used include elastic washers, toothed washers, double nuts, retaining nuts, nylon ring locking nuts, etc. The disadvantage is that it is difficult to maintain a good anti-loosening effect in harsh environments such as high temperature and high vibration, and it is easily affected by thread lubricants.

[0004] 2. Riveting and punching to prevent loosening. This method uses riveting, punching, bonding, etc. to prevent the locking thread pair from rotating, thereby achieving the purpose of preventing loosening. The disadvantage is that it is difficult to disassemble and cannot be reused.

[0005] 3. Mechanical anti-loosening: This method uses a stopping element to limit the relative rotation of the threaded pair. The methods used include stop washers, steel wire series connection, open nuts with cotter pins, etc. The disadvantage is that the stop washer method can only be used for connections that accommodate bent ears, the steel wire series connection method is relatively cumbersome and difficult to disassemble, and the open nut with cotter pin method is difficult to match the pin hole position on the screw with the opening of the nut's optimal pinning position, making assembly more difficult. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and provides a mechanical anti-loosening device which has a simple structure and is easy to implement.

[0007] To achieve the above-mentioned purpose, the utility model mainly adopts the following technical solutions: a mechanical anti-loosening device, including a stop rod, a retaining ring, a stop gear, a stop sleeve, a nut, and a screw rod, wherein the stop sleeve is an integrated structure composed of a sleeve and a gear ring, one end of the stop sleeve is a sleeve, and the other end is a gear ring, the sleeve cooperates with the nut, the gear ring cooperates with the stop gear, the stop gear cooperates with the stop rod, the sleeve of the stop sleeve engages with the nut, so that the stop sleeve and the nut cannot rotate relative to each other, the gear ring of the stop sleeve engages with the stop gear, so that the stop sleeve and the stop gear cannot rotate relative to each other, the stop gear engages with the stop rod, so that the stop gear and the stop rod cannot rotate relative to each other, the nut, the stop sleeve, the stop gear, and the stop rod engage and stop in sequence, and finally the nut is stopped and prevented from loosening.

[0008] The junction between the inner sleeve of the stop sleeve and the gear ring is an annular protrusion, the inner diameter of which is smaller than the outer diameter of the nut and smaller than or equal to the inner diameter of the gear ring.

[0009] The number of teeth of the gear ring of the stop sleeve and the number of teeth of the stop gear are in integer multiples, and one is provided with teeth continuously along the circumference, and the other is provided with teeth at uniform intervals along the circumference.

[0010] The diameter of the stop rod is smaller than the diameter of the screw rod. The stop rod and the screw rod are an integrated structure. The stop rod is provided with a groove for installing a retaining ring.

[0011] According to the matching relationship, there are one or more cross-sectional shapes between the sleeve and the nut of the stop sleeve, the gear ring and the stop gear, and the stop gear and the stop rod to prevent rotation.

[0012] The beneficial effects of the utility model are:

[0013] Compared with the prior art, the mechanical anti-loosening device engages the sleeve of the stop sleeve with the nut, so that the stop sleeve and the nut cannot rotate relative to each other, the gear ring of the stop sleeve engages with the stop gear, so that the stop sleeve and the stop gear cannot rotate relative to each other, the stop gear engages with the stop rod, so that the stop gear and the stop rod cannot rotate relative to each other, the nut, the stop sleeve, the stop gear, and the stop rod are engaged and stopped in sequence, and finally the nut is stopped and prevented from loosening. Since the joints of the various parts are of a geometric shape that prevents rotation, the mechanical anti-loosening device has a reliable anti-loosening effect.

[0014] When the nut is tightened, because the toothed ring of the stop sleeve or the stop gear is continuously provided with a large number of teeth along the circumference, the toothed ring of the stop sleeve and the stop gear can be engaged and locked at the best fastening position of the nut without losing the fastening force and easy assembly.

[0015] The utility model has reasonable design and is easy to implement, adopts a reliable mechanical device to prevent the relative rotation of the thread pair, and can achieve the effect of permanent stopping and anti-loosening under variable load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic cross-sectional view of the assembly of an embodiment of the utility model;

[0017] Figure 2 A top view of an embodiment of the present utility model Figure 1 ;

[0018] Figure 3 A top view of an embodiment of the present utility model Figure 2 ;

[0019] Figure 4 A top view of an embodiment of the present utility model Figure 3 ;

[0020] Figure 5 A top view of an embodiment of the present utility model Figure 4 ;

[0021] Figure 6 AA section view of the embodiment of the utility model Figure 1 ;

[0022] Figure 7 AA section view of the embodiment of the utility model Figure 2 ;

[0023] Figure 8 AA section view of the embodiment of the utility model Figure 3 ;

[0024] Fig. 9 AA section view of the embodiment of the utility model Figure 4 ;

[0025] Fig.10 It is a BB cross-sectional view of an embodiment of the utility model;

[0026] Fig.11 This is a schematic diagram of the retaining ring structure of an embodiment of the utility model;

[0027] Fig.12 The gear ring structure of the embodiment of the utility model is shown in FIG. Figure 1 ;

[0028] Fig.13 The gear ring structure of the embodiment of the utility model is shown in FIG. Figure 2 ;

[0029] Fig.14 The structure of the stop gear of the utility model is shown in FIG. Figure 1 ;

[0030] Fig.15 The structure of the stop gear of the utility model is shown in FIG. Figure 2 ;

[0031] Fig.16 The structure of the stop gear of the utility model is shown in FIG. Figure 3 ;

[0032] Fig.17 The structure of the stop gear of the utility model is shown in FIG. Figure 4 .

[0033] In the figure: 1 stop rod, 2 retaining ring, 3 stop gear, 4 stop sleeve, 5 nut, 6 screw rod, 15 sleeve, 16 gear ring. DETAILED DESCRIPTION

[0034] The following will refer to the attached Figure 1-17, the technical solutions in the embodiments of the present utility model are described in detail. Obviously, the described embodiments are only a part of the present utility model, rather than all the embodiments.

[0035] Reference Figure 1-17 As shown, a mechanical anti-loosening device includes a stop rod 1, a retaining ring 2, a stop gear 3, a stop sleeve 4, a nut 5, and a threaded rod 6. The stop sleeve 4 is an integrated structure composed of a sleeve 15 and a gear ring 16. One end of the stop sleeve 4 is the sleeve 15, and the other end is the gear ring 16. The sleeve 15 cooperates with the nut 5, the gear ring 16 cooperates with the stop gear 3, and the stop gear 3 cooperates with the stop rod 1. The sleeve 15 of the stop sleeve 4 engages with the nut 5, so that the stop sleeve 4 and the nut 5 cannot rotate relative to each other. The gear ring 16 of the stop sleeve 4 engages with the stop gear 3, so that the stop sleeve 4 and the stop gear 3 cannot rotate relative to each other. The stop gear 3 engages with the stop rod 1, so that the stop gear 3 and the stop rod 1 cannot rotate relative to each other. The nut 5, the stop sleeve 4, the stop gear 3, and the stop rod 1 engage and stop in sequence, and finally the nut 5 is stopped and anti-loosened.

[0036] The junction between the sleeve 15 of the stop sleeve 4 and the gear ring 16 is an annular protrusion, the inner diameter of which is smaller than the outer diameter of the nut 5 and smaller than or equal to the inner diameter of the gear ring 16 .

[0037] The number of teeth of the gear ring 16 of the stop sleeve 4 and the number of teeth of the stop gear 3 are in integer multiples, and one is provided with teeth continuously along the circumference, and the other is provided with teeth at even intervals along the circumference.

[0038] The diameter of the stop rod 1 is smaller than the diameter of the screw rod 6. The stop rod 1 and the screw rod 6 are an integrated structure. The stop rod 1 is provided with a groove for installing a retaining ring.

[0039] According to the matching relationship, there are one or more cross-sectional shapes that prevent rotation between the sleeve 15 of the stop sleeve 4 and the nut 5, the gear ring 16 and the stop gear 3, and the stop gear 3 and the stop rod 1.

[0040] In this embodiment, the nut 5 is first installed on the screw rod 6 and tightened with a wrench, and then the sleeve 15 end of the stop sleeve 4 is aligned with the nut and slightly rotated to engage and lock the sleeve 15 of the stop sleeve 4 with the nut 5, and then the stop gear 3 is put on the stop rod 1. Because the ring gear 16 of the stop sleeve 4 or the stop gear 3 is continuously provided with a large number of teeth along the circumference, the engagement of the ring gear 16 with the stop gear 3 only requires a small relative rotation, and the tooth gap, the gap between the sleeve 15 and the nut 5, and the gap between the stop gear 3 and the stop rod 1 can be used to achieve the engagement and locking of the ring gear 16 with the stop gear 3, or the nut 5 Slightly rotate at the optimal tightening position to achieve engagement and locking of the ring gear 16 and the stop gear 3, and finally install the retaining ring 2 in the retaining ring groove of the stop rod 1 to complete the installation of the mechanical anti-loosening device. After the nut 5 is engaged with the sleeve 15 of the stop sleeve 4, the stop sleeve 4 and the nut 5 cannot rotate relative to each other, and after the ring gear 16 of the stop sleeve 4 is engaged with the stop gear 3, the stop sleeve 4 and the stop gear 3 cannot rotate relative to each other, and after the stop gear 3 is engaged with the stop rod 1, the stop gear 3 and the stop rod 1 cannot rotate relative to each other, that is, the stop gear 3 and the stop sleeve 4 are used to achieve permanent stopping and anti-loosening of the nut 5 by the stop rod 1 under variable load.

[0041] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician in the field described in the embodiments of the present invention who makes equivalents or changes according to the technical scheme and concept of the present invention within the technical scope disclosed by the present invention shall be deemed to be within the protection scope of the present invention.

Claims

1. A mechanical anti-loosening device, comprising a stop rod, a retaining ring, a stop gear, a stop sleeve, a nut, and a screw, characterized in that: The stop sleeve is an integrated structure composed of a sleeve and a gear ring. One end of the stop sleeve is the sleeve and the other end is the gear ring. The sleeve cooperates with the nut, the gear ring cooperates with the stop gear, and the stop gear cooperates with the stop rod. The sleeve of the stop sleeve engages with the nut, so that the stop sleeve and the nut cannot rotate relative to each other. The gear ring of the stop sleeve engages with the stop gear, so that the stop sleeve and the stop gear cannot rotate relative to each other. The stop gear engages with the stop rod, so that the stop gear and the stop rod cannot rotate relative to each other. The nut, the stop sleeve, the stop gear, and the stop rod are engaged and stopped in sequence, and finally the nut is stopped and prevented from loosening.

2. A mechanical anti-loosening device according to claim 1, characterized in that: The junction between the sleeve of the stop sleeve and the gear ring is an annular protrusion, the inner diameter of which is smaller than the outer diameter of the nut and smaller than or equal to the inner diameter of the gear ring.

3. A mechanical anti-loosening device according to claim 1, characterized in that: The number of teeth of the gear ring of the stop sleeve and the number of teeth of the stop gear are in integer multiples, and one is provided with teeth continuously along the circumference, and the other is provided with teeth at uniform intervals along the circumference.

4. A mechanical anti-loosening device according to claim 1, characterized in that: The diameter of the stop rod is smaller than the diameter of the screw rod. The stop rod and the screw rod are an integrated structure. The stop rod is provided with a groove for installing a retaining ring.

5. A mechanical anti-loosening device according to claim 1, characterized in that: According to the matching relationship, there are one or more cross-sectional shapes between the sleeve and the nut of the stop sleeve, the gear ring and the stop gear, and the stop gear and the stop rod to prevent rotation.

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