CN214945645U

CN214945645U - Slotted check bolt

Info

Publication number: CN214945645U
Application number: CN202120567291.8U
Authority: CN
Inventors: 王锐治
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-11-30
Anticipated expiration: 2031-03-19

Abstract

The utility model belongs to the field of fasteners, which is used for fastening and connecting two parts with through holes, in particular to a slotted check bolt, which comprises a bolt and a nut screwed on a bolt screw rod, and is characterized by also comprising a second stop groove uniformly distributed on the bolt screw rod, a first stop groove uniformly distributed on an inner ring of the nut and a stop key inserted between the first stop groove and the second stop groove; the number of the second stop grooves is consistent with that of the first stop grooves, and the number of the second stop grooves is not less than four; the second stop groove penetrates through the thread section of the bolt, the depth of the second stop groove is larger than or equal to the thread pitch of the bolt and smaller than the maximum radius of the bolt, and the width of the second stop groove is larger than or equal to the depth of the second stop groove. The utility model discloses an in the locking key injects first locking groove and second locking groove, carries out circumference location to the nut through the locking key, even under the condition of vibration, also can prevent that the nut from producing relative rotation for the bolt to avoid the nut to produce radial displacement from between the bolt.

Description

Slotted check bolt

Technical Field

The utility model belongs to the fastener field for two parts that have the through-hole of fastening connection, concretely relates to fluting check bolt.

Background

Bolts are the preferred fastener for all kinds of industrial applications for the simple reason that they are easy to remove, however, this also makes them prone to problems of spontaneous loosening and loss of pretension.

The common screw and nut connection has self-locking property, and can not be loosened by self when the change of static load and working temperature is not large, but the connection can be loosened under the action of impact, vibration or variable load and when the change of working temperature is not large, so that the work is influenced, even accidents occur, and in order to ensure the connection to be safe and reliable, effective anti-loosening measures must be taken for the connection of the screw and the nut.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a fluting fastening bolt, aims at solving a bolt and is becoming flexible easily under the vibration condition problem.

The utility model adopts the technical scheme as follows: a slotted anti-loose bolt comprises a bolt, a nut screwed on a bolt screw, second locking grooves uniformly distributed on the bolt screw, first locking grooves uniformly distributed on an inner ring of the nut and a locking key inserted between the first locking grooves and the second locking grooves;

the number of the second stop grooves is consistent with that of the first stop grooves, and the number of the second stop grooves is not less than four;

the second stop groove penetrates through the threaded section of the bolt, the depth of the second stop groove is greater than or equal to the thread pitch of the bolt and smaller than the maximum radius of the bolt, and the width of the second stop groove is greater than or equal to the depth of the second stop groove;

the first stop groove penetrates through the thread of the nut, the depth of the first stop groove is larger than or equal to the thread pitch of the nut and smaller than the difference between the outer ring radius and the inner ring radius of the nut, and the width of the first stop groove is larger than or equal to the depth of the first stop groove.

Further, the bottom of each of the first and second detent grooves is formed with a transition radius adapted to the width of the detent key.

Further, the corners of the stop keys are rounded.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the stop keys are inserted into the first stop grooves and the second stop grooves, and the nuts are circumferentially positioned through the stop keys, so that the nuts can be prevented from rotating relative to the bolts even under the condition of vibration, and radial displacement of the nuts from the bolts is avoided.

2. By making a transition fillet radius suitable for the width of the stop key at the bottom of each of the first and second stop grooves and by using a rounding process at the corners of the stop key, not only is assembly facilitated, but stress concentration can also be avoided.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a partial sectional view of section a-a in fig. 1.

Description of reference numerals:

1. a bolt; 2. a nut; 3. a stop key; 4. a first stopper groove; 5. a second detent groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Example one

Referring to FIG. 1: a slotted anti-loose bolt comprises a bolt 1, a nut 2 screwed on a screw rod of the bolt 1, second stop grooves 5 uniformly distributed on the screw rod of the bolt 1, first stop grooves 4 uniformly distributed on an inner ring of the nut 2 and stop keys 3 inserted between the first stop grooves 4 and the second stop grooves 5;

the number of the second stop grooves 5 is consistent with that of the first stop grooves 4, and the number of the second stop grooves is not less than four;

the second stop groove 5 penetrates through the thread section of the bolt 1, the depth of the second stop groove is greater than or equal to the thread pitch of the bolt 1 and smaller than the maximum radius of the bolt 1, and the width of the second stop groove 5 is greater than or equal to the depth of the second stop groove;

the first stop groove 4 penetrates through the thread of the nut 2, the depth of the first stop groove is larger than or equal to the thread pitch of the nut 2 and smaller than the difference between the outer ring radius and the inner ring radius of the nut 2, and the width of the first stop groove 4 is larger than or equal to the depth of the first stop groove.

In the first embodiment, after the component is fixed by the bolt 1 and the nut 2, the first stopper groove 4 is opened at the corresponding position on the nut 2 according to the position of the second stopper groove 5 on the bolt 1, and the nut 2 is inserted into the first stopper groove 4 and the second stopper groove 5 by using the stopper key 3, and the nut 2 is circumferentially positioned by the stopper key 3, so that the nut 2 can be prevented from rotating relative to the bolt 1 even under the condition of vibration, and the nut 2 can be prevented from falling off the bolt 1.

Example two

Referring to fig. 1, the bottom of each of the first and second

detent grooves

4 and 5 is formed with a transition radius adapted to the width of the detent key 3.

In the second embodiment, based on the first embodiment, in order to prevent stress concentration on the nut 2 and the bolt 1 at the position where the first stop groove 4 and the second stop groove 5 are opened, thereby causing cracks to be generated in the first stop groove 4 and the second stop groove 5 under load, transition fillet radii suitable for the width of the stop key 3 are formed at the bottom of each of the first stop groove 4 and the second stop groove 5, and the stop key 3 is convenient to assemble.

EXAMPLE III

Referring to fig. 2, the corners of the stopper key 3 are rounded.

In the fourth embodiment, based on the first embodiment, by adopting the rounding process at the corners of the stopper key 3, not only the assembly is facilitated, but also the stress concentration can be prevented.

Claims

1. A slotted anti-loose bolt comprises a bolt (1) and a nut (2) screwed on a screw rod of the bolt (1), and is characterized by further comprising second locking grooves (5) uniformly distributed on the screw rod of the bolt (1), first locking grooves (4) uniformly distributed on an inner ring of the nut (2) and a locking key (3) inserted between the first locking grooves (4) and the second locking grooves (5);

the number of the second stop grooves (5) is consistent with that of the first stop grooves (4), and the number of the second stop grooves is not less than four;

the second stop groove (5) penetrates through the thread section of the bolt (1), the depth of the second stop groove is greater than or equal to the thread pitch of the bolt (1) and smaller than the maximum radius of the bolt (1), and the width of the second stop groove (5) is greater than or equal to the depth of the second stop groove;

the first stop groove (4) penetrates through the thread of the nut (2), the depth of the first stop groove is larger than or equal to the thread pitch of the nut (2) and smaller than the difference between the outer ring radius and the inner ring radius of the nut (2), and the width of the first stop groove (4) is larger than or equal to the depth of the first stop groove.

2. The slotted lockbolt of claim 1, wherein: the bottoms of the first stop groove (4) and the second stop groove (5) are provided with transition fillet radii suitable for the width of the stop key (3).

3. The slotted lockbolt of claim 2, wherein: the corners of the stop keys (3) are rounded.