阅读说明：本技术 一种螺栓自锁防松结构 (Bolt self-locking anti-loosening structure ) 是由 陈建军 陈雨繁 于 2020-04-23 设计创作，主要内容包括：本发明公开了一种螺栓自锁防松结构,其特征在于所述螺栓自锁防松结构包括：防松螺栓,防松螺母,防松锁止环和弹簧垫圈。所述防松螺栓的螺纹段设置有螺旋防松凹槽,所述防松锁止环上设置有防松凸齿和若干楔形防松齿,所述防松螺母设置有若干楔形防松齿；所述弹簧垫圈、防松锁止环依次安装在防松螺栓的螺纹段上,所述防松螺母旋入防松螺栓,防松螺母与防松锁止环上的楔形防松齿构造规格相同且互相啮合,防松锁止环上的防松凸齿嵌入螺旋防松凹槽内。本发明螺栓自锁防松方法能有效地将螺栓的预紧力控制在恒定、有效的范围内,防止螺栓螺母的松动,将螺栓螺母的状态锁定。(The invention discloses a bolt self-locking anti-loosening structure, which is characterized by comprising the following components in parts by weight: the locking bolt, locknut, locking lock ring and spring washer. The thread section of the anti-loosening bolt is provided with a spiral anti-loosening groove, the anti-loosening locking ring is provided with an anti-loosening convex tooth and a plurality of wedge-shaped anti-loosening teeth, and the anti-loosening nut is provided with a plurality of wedge-shaped anti-loosening teeth; the spring washer and the anti-loosening locking ring are sequentially installed on the thread section of the anti-loosening bolt, the anti-loosening nut is screwed into the anti-loosening bolt, the anti-loosening nut and the wedge-shaped anti-loosening teeth on the anti-loosening locking ring are identical in structural specification and meshed with each other, and the anti-loosening convex teeth on the anti-loosening locking ring are embedded into the spiral anti-loosening grooves. The bolt self-locking anti-loosening method can effectively control the pre-tightening force of the bolt in a constant and effective range, prevent the bolt and the nut from loosening and lock the state of the bolt and the nut.)

1. The utility model provides a bolt auto-lock anti loosening structure which characterized in that bolt auto-lock anti loosening structure includes:

a lockbolt, a locknut, a lockwasher, a spring washer,

the thread section of the anti-loosening bolt is provided with a spiral anti-loosening groove, the spiral anti-loosening groove penetrates through the thread section of the anti-loosening bolt, and the lead angle of the spiral anti-loosening groove is larger than that of the anti-loosening bolt;

the bottom of the locknut, which is in contact with the anti-loosening locking ring, is provided with a plurality of wedge-shaped anti-loosening teeth, the number of the wedge-shaped anti-loosening teeth can be adjusted according to the pre-tightening force control precision requirement of the connecting part, the number of the wedge-shaped anti-loosening teeth can be properly increased for the connecting part with higher pre-tightening force requirement control precision, and otherwise, the number of the wedge-shaped anti-loosening teeth can be properly reduced;

the inner side of a central circular hole of the anti-loosening locking ring is provided with anti-loosening convex teeth, the upper surface of the anti-loosening locking ring, which is in contact with the anti-loosening nut, is provided with a plurality of wedge-shaped anti-loosening teeth, and the bottom of the anti-loosening locking ring is of a planar structure;

the spring washer, the anti-loosening locking ring and the anti-loosening nut are sequentially installed on the thread section of the anti-loosening bolt, the anti-loosening convex teeth of the anti-loosening locking ring are embedded into the spiral anti-loosening grooves, and two surfaces, which are in contact with each other, of the anti-loosening locking ring and the anti-loosening nut are respectively provided with wedge-shaped anti-loosening tooth structures with the same specification and can be meshed with each other.

2. The bolt self-locking anti-loosening structure according to claim 1, characterized in that: the screw thread section of the anti-loosening bolt is provided with a plurality of screw anti-loosening grooves according to the pre-tightening force control requirement of the connecting part, when the number of the screw anti-loosening grooves is more than one, the screw thread sections are distributed on the anti-loosening bolt at equal intervals of lead angles, namely, the screw thread sections are distributed in a rotational symmetry mode by taking the axis of the anti-loosening bolt as a fixed point.

3. The bolt self-locking anti-loosening structure according to claim 2, characterized in that: the width of the spiral anti-loosening groove is not more than 1/2 of the nominal diameter of the anti-loosening bolt; the depth of the spiral anti-loosening groove is not more than 1/5 of the nominal diameter of the anti-loosening bolt.

4. The bolt self-locking anti-loosening structure according to claim 1, characterized in that: the cross section of the wedge-shaped anti-loosening teeth is a right-angled triangle.

5. The bolt self-locking anti-loosening structure according to claim 4, wherein: the height of the wedge-shaped anti-loosening teeth is not larger than the thickness of the spring washer.

6. The bolt self-locking anti-loosening structure according to claim 1, characterized in that: the thickness of the anti-loosening convex teeth arranged in the central circular hole of the anti-loosening locking ring is not smaller than the thread pitch of the anti-loosening bolt threads, the number of the anti-loosening convex teeth is not more than that of the spiral anti-loosening grooves, and the anti-loosening grooves can be embedded into the corresponding spiral anti-loosening grooves.

Technical Field

The invention relates to the field of machinery, in particular to a self-locking anti-loose bolt structure which is suitable for preventing bolt screwing failure caused by loosening of a fastener bolt due to vibration.

Background

The anti-loosening bolt is mainly used for controlling loosening and failure of a connecting part which runs under the condition of a vibration state, and particularly needs to take measures to prevent the normal running of the mechanical connecting part from being influenced by the loosening of the part in mechanical equipment such as mining machinery and the like under the vibration working state. The current common fastener anti-loosening methods generally include non-detachable anti-loosening solutions and friction-increasing anti-loosening solutions. The non-detachable anti-loosening scheme adopts modes such as spot riveting and welding to change detachable threaded connection into non-detachable threaded connection. In the non-detachable anti-loosening scheme, the fastener cannot be reused, is troublesome to operate, and is often used in certain important occasions requiring high anti-loosening performance and not needing to be detached. The anti-loosening scheme for increasing the friction force achieves the anti-loosening purpose by increasing the friction force between the threads or between the bolt head and the end surface of the nut. The locking scheme of increase frictional force does not receive the restriction in space, can dismantle repeatedly, but the reliability is relatively poor, after working for a certain time, can reduce locking effect because of reasons such as vibration. There is a need to design a connecting part locking component with a function of controlling loosening so as to ensure continuous and normal operation of a machine running under a vibration state. Therefore, how to realize a bolt fastening anti-loosening structure and a bolt fastening anti-loosening method which have good anti-loosening effect and relatively simple structure is a problem which needs to be solved urgently at present.

Disclosure of Invention

The invention aims to provide a bolt self-locking anti-loosening structure which is effective in anti-loosening control and convenient to use.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a bolt auto-lock anti loosening structure which characterized in that bolt auto-lock anti loosening structure includes: the locking bolt, locknut, locking lock ring and spring washer. The spring washer, the anti-loosening locking ring and the anti-loosening nut are sequentially arranged on the thread section of the anti-loosening bolt.

The thread section of the anti-loosening bolt is provided with a spiral anti-loosening groove which penetrates through the thread section of the whole anti-loosening bolt.

The bottom of locknut and locking ring contact is provided with a plurality of wedge locking teeth, can adjust its quantity according to adapting unit's pretightning force control accuracy requirement, requires the higher adapting unit of control accuracy to the pretightning force and can suitably increase wedge locking tooth quantity, otherwise can suitably reduce wedge locking tooth quantity.

Locking convex teeth are arranged on the inner side of a central circular hole of the locking ring, a plurality of wedge-shaped locking teeth are arranged on the upper surface of the locking ring in contact with the locknut, and the bottom of the locking ring is of a planar structure.

The locking convex teeth of the locking ring are embedded into the spiral locking grooves of the locking bolt, and the two surfaces of the locking ring and the locking nut which are contacted with each other are respectively provided with wedge-shaped locking tooth structures with the same specification which can be meshed with each other.

Furthermore, the lead angle of the spiral anti-loosening groove is larger than that of the thread section of the anti-loosening bolt; the width of the spiral anti-loosening groove is not more than 1/2 of the nominal diameter of the anti-loosening bolt; the depth of the spiral anti-loosening groove is not more than 1/5 of the nominal diameter of the anti-loosening bolt.

Furthermore, the spiral anti-loosening grooves arranged in the thread sections of the anti-loosening bolts can be arranged in a plurality of the spiral anti-loosening grooves according to the pre-tightening force control requirement of the connecting part, and when the number of the spiral anti-loosening grooves is more than one, the spiral anti-loosening grooves are distributed in the thread sections of the anti-loosening bolts at equal intervals at equal lead angles, namely, the spiral anti-loosening grooves are distributed in a rotational symmetry mode by taking the axis of the anti-loosening bolt as a fixed point.

Further, the cross section of the wedge-shaped anti-loosening teeth is a right-angled triangle.

Further, the height of the wedge-shaped locking tooth is not more than the thickness of the spring washer.

Furthermore, the thickness of the anti-loosening convex teeth arranged in the central circular hole of the anti-loosening locking ring is not smaller than the thread pitch of the anti-loosening bolt, the number of the anti-loosening convex teeth is not more than the number of the spiral anti-loosening grooves, and the spiral anti-loosening grooves can be embedded.

The advantages of the invention are as follows:

1. the wedge-shaped anti-loosening teeth are adopted for loosening prevention of the bolt, so that the pressing force applied to the connecting part can be effectively controlled, and the constant pressing force can be controlled within an effective range.

2. The locking convex tooth of locking lock ring imbeds in the spiral locking recess, can ensure that locking lock ring and locknut's permanent meshing makes the bolt locking not hard up.

3. The simple operation when part installation, maintenance and maintenance make it drop from locknut through opening spring washer opening, and then makes locknut and locking ring break away from, makes the anticlockwise synchronous mechanism of intermeshing's wedge lock tooth structure inefficacy, and the locknut locking is removed to convenient to detach.

In conclusion, the bolt self-locking anti-loosening structure and the method can control the pre-tightening force of the bolt in a constant and effective range, so that the connecting part running in a vibration state is effectively connected and works safely and normally, the defects of the existing various anti-loosening structures can be overcome, the anti-loosening effect is good, the manufacturing cost is low, the maintenance and the operation such as installation, disassembly and the like are convenient, and the bolt self-locking anti-loosening structure and the method have good application prospects.

Drawings

Fig. 1 is a schematic structural view of the bolt self-locking anti-loosening structure of the invention.

Fig. 2 is a plan view of the check bolt.

Fig. 3 is a plan view of the check bolt.

Fig. 4 is a plan view of the locknut.

Fig. 5 is a plan view of the locknut.

Fig. 6 is a bottom view of the locknut.

FIG. 7 is a plan view of the anti-loosening locking ring.

FIG. 8 is a top view of the anti-loosening locking ring.

Fig. 9 is a bottom view of the anti-loosening locking ring.

FIG. 10 is a cross-sectional view of the anti-loosening locking ring.

Fig. 11 is a plan view of the spring washer.

The parts numbers in the figures are as follows

A lock bolt 1.

A spiral anti-loosening groove 1-1 and an external thread 1-2 of an anti-loosening bolt.

And a locknut 2.

Wedge-shaped lockteeth 2-1 of the locknut and internal threads 2-2 of the locknut.

A locking ring 3.

The locking ring comprises wedge-shaped locking teeth 3-1, locking convex teeth 3-2 and a central circular hole 3-3.

A spring washer 4.

Detailed Description

The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention. The attached drawings take the right-handed hexagon bolt and nut, a single spiral anti-loosening groove, a single anti-loosening convex tooth, a spiral anti-loosening groove tooth bottom and an anti-loosening convex tooth crest which are respectively in the shape of circular arcs as an example for explanation.

Fig. 1 shows a schematic diagram of a self-locking anti-loosening structure of a bolt, which comprises an anti-loosening bolt 1, an anti-loosening nut 2, an anti-loosening locking ring 3 and a spring washer 4.

The anti-loosening bolt 1 is provided with a spiral anti-loosening groove 1-1, the spiral anti-loosening groove 1-1 penetrates through the thread section of the anti-loosening bolt 1, the bottom of the cross section of the spiral anti-loosening groove 1-1 is arc-shaped, and the lead angle of the spiral anti-loosening groove 1-1 is larger than that of the thread of the anti-loosening bolt 1.

The bottom of the locknut 2 is provided with a plurality of wedge-shaped lockteeth 2-1, the number of the wedge-shaped lockteeth can be adjusted according to the pretightening force control precision requirement of the connecting part, the number of the wedge-shaped lockteeth 2-1 can be properly increased for the connecting part with higher pretightening force control precision requirement, and otherwise, the number of the wedge-shaped lockteeth can be properly reduced.

The inner side of a central circular hole of the anti-loosening locking ring 3 is provided with anti-loosening convex teeth 3-2, the upper surface of the anti-loosening locking ring, which is in contact with the anti-loosening nut, is provided with a plurality of wedge-shaped anti-loosening teeth 3-1, and the bottom of the anti-loosening locking ring is of a planar structure.

The spring washer 4, the anti-loosening locking ring 3 and the anti-loosening nut 2 are sequentially installed on the thread section of the anti-loosening bolt 1, anti-loosening convex teeth 3-2 of the anti-loosening locking ring 3 are embedded into the spiral anti-loosening grooves 1-1, the two surfaces of the anti-loosening locking ring 3, which are in mutual contact with the anti-loosening nut 2, are respectively provided with wedge-shaped anti-loosening teeth which have the same structural specification and can be meshed with each other, the wedge-shaped anti-loosening teeth have the effects that the anti-loosening nut 2 is screwed into the anti-loosening locking ring 3 in the clockwise direction to perform asynchronous motion, and the anti-loosening nut 2 is screwed out of the anti-loosening locking ring 3 in the counterclockwise direction to perform synchronous motion.

The lead angle of the spiral anti-loosening groove 1-1 is larger than that of the thread of the anti-loosening bolt 1, when the anti-loosening nut rotates anticlockwise and becomes loose, the anti-loosening locking ring 3 is forced to rotate synchronously and axial displacement is larger than that of the anti-loosening nut 2 under the action of the spiral anti-loosening groove 1-1 through a synchronous mechanism formed by meshing of wedge-shaped anti-loosening teeth, and the anti-loosening nut 2 and the anti-loosening locking ring 3 are forced to extrude friction force of each other to increase and self-lock.

Further, the width d1 of the spiral anti-loose groove 1-1 is not more than 1/2 of the nominal diameter of the anti-loose bolt 1; the depth h1 of the spiral anti-loosening groove 1-1 is not more than 1/5 of the nominal diameter of the anti-loosening bolt 1.

Further, the cross section of the wedge-shaped anti-loosening teeth 2-1 is a right-angled triangle.

Further, the height h3 of the wedge-shaped locking tooth 3-1 is not more than the thickness d4 of the spring washer 4.

Further, the thickness d3 of the locking convex tooth arranged in the central circular hole of the locking ring 3 is not less than the thread pitch of the locking bolt 1.

The implementation method comprises the following steps:

1. the lockbolt 1 is inserted into a desired connecting member.

2. The spring washer 4 is sleeved into the check bolt 1.

3. The anti-loose convex teeth 3-2 of the anti-loose locking ring 3 are embedded into the spiral anti-loose grooves 1-1 and screwed into the anti-loose bolt 1.

4. And screwing the locknut 2 into the lockbolt 1, and screwing and approaching the torque required by the design. Therefore, the aim of fixing the locknut 2 to ensure that the connecting part continuously, effectively and normally works in a vibration state can be achieved.

The locknut 2 and the locking ring 3 are separated by opening the spring washer 4 to enable the locknut to fall off from the lockbolt, the anticlockwise synchronous mechanism of the mutual meshing of the wedge-shaped lockteeth 2-1 and the wedge-shaped lockteeth 3-1 fails, and the locknut is unlocked so as to be convenient to disassemble.

The number of the wedge-shaped anti-loosening teeth 2-1 and the wedge-shaped anti-loosening teeth 3-1 on the anti-loosening nut 2 and the anti-loosening locking ring 3 can be adjusted according to the pre-tightening force control precision requirement of the connecting parts, the number of the connecting parts with higher pre-tightening force control precision can be properly increased, and otherwise, the number of the wedge-shaped anti-loosening teeth can be properly reduced.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.