CN2716571Y - Catch bolt - Google Patents

Abstract

The utility model relates to a catch bolt, comprising a bolt main body, a split rotating segment of the bolt, a mandrel connecting rod and a spring washer. When the catch bolt is installed in place, the mandrel connecting rod is rotated to drive the split rotating segment of the bolt to conduct cam-locus movement; the error of the tolerance quality (the tolerance of the effective diameter of threads) is used to prompt the thread of the split rotating segment of the bolt to have screw-pitch change; the radial force of the bolt is loaded, which increases the friction force between the thread so as to realize the stopping-retreating function. The principle and the effect of the catch bolt are better than the products of the same kind.

Description

The retaining bolt

Technical field

In the affiliated all kinds of industries of the utility model, fastening standard piece category.Particularly connect and given prominence on the fastening basis that it loosens, the retaining performance at general bolt.

Background technique

Since the clamping bolt invention was extensive use of to the modern times, all clamping bolts all existed a series of loosening problem under vibration environment.As the train under the motion state, automobile; Connecting body under machinery under the vibration condition and the irrgular movement condition etc.It mainly shows to connect to be connected between main body and the bolt and takes place looseningly to bring bad hidden danger, dangerous accident easily takes place, so cause economic loss in various degree, has directly influenced economic benefit.Though existing spring washer, special tooth form screw thread can't thoroughly solve loosening problem with solving screw retention.

Summary of the invention

In order to solve the loosening problem that plain bolt occurs under vibration environment, the retaining bolt that the utility model provides can solve the bolt looseness problem in limiting bolt Dimensions scope, and improves same size bolt grade.

The utility model implementation is: retaining bolt shape, structure characteristic are different from general plain bolt, and it rotates joint, spring washer and axle connecting rod by bolt body, bolt split and forms.Its axle connecting rod is to screw in its hole through the bolt body internal thread, and is fixed on the bolt split rotation joint.In the retaining bolt screws in connecting body, be applied on the bolt body by external force, make it produce axial force, the mandrel connecting rod rotates the bolt split and saves and is the cam locus motion again, utilize accuracy of thread error (effective diameter of thread tolerance) to impel screw thread generation pitch variation on the nut split rotational segment, produce its radial force, improve frictional force between the screw thread, make that its bolt bears axially, two power radially, reach locking, retaining purpose.When the retaining bolt was in off working state, spring washer should be in less than on the maximum flexibility power position, and utilized outside thread and bolt split on the elastic force control bolt body to rotate concentricity between the outside thread on saving.

The beneficial effects of the utility model are: solved the loosening phenomenon that bolt occurs under vibration environment, played the effect of bolt retaining.

Description of drawings

Fig. 1 is a retaining bolt complete section structural representation

Fig. 2 is that A is to perspective view

Fig. 3 is the B-B generalized section

Specific embodiments

Below in conjunction with drawings and Examples the utility model is described further.

At first with in the whole screw-in of the retaining bolt connecting body, earlier outer six sides on the bolt body 4 are applied external force, make it reach quantitative torque, produce the bolt axial force, re-use the equidirectional mandrel connecting rod 2 of allen wrench, it is moved on the internal thread on the bolt body 4, drive the bolt split and rotate joint 1 generation cam locus motion, make it produce the bolt radial force, improve frictional force between the screw thread, behind the torque of determining to reach quantitative, operation is finished, at this moment, spring washer 3 is subjected to the extruding of axle connecting rod, is in maximum flexibility power state, plays anti-loosening effect to a certain degree, all operating process are simply orderly, and reached bolt and loosen, the retaining effect.

Claims (7)

1. a retaining bolt is made up of bolt body, bolt split rotation joint, axle connecting rod and spring washer four parts, it is characterized in that: axle connecting rod one end outside thread is connected with the bolt body screw-internal thread fit, the axle connecting rod the other end passes spring washer, receives the bolt split by the hot pressure welding of bolt body endoporus again and rotates on the joint.

2. retaining bolt according to claim 1 is characterized in that: the axle connecting rod cooperates with the bolt body fine thread.

3. retaining bolt according to claim 1 is characterized in that: the bolt split is rotated the joint effective diameter of thread less than the bolt body effective diameter of thread.

4. retaining bolt according to claim 1 is characterized in that: the bolt split connects joint and adopts hot pressing, welding to be connected with the axle connecting rod.

5. retaining bolt according to claim 1 is characterized in that: the bolt body reach is 3～5 times that the joint reach is rotated in the bolt split.

6. retaining bolt according to claim 1 is characterized in that: axle connecting rod one end is outside thread, interior hexagonal structure.

7. retaining bolt according to claim 1 is characterized in that: spring washer is placed in the bolt body step hole.

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