CN212479863U

CN212479863U - Bolt and nut assembly

Info

Publication number: CN212479863U
Application number: CN202020957561.1U
Authority: CN
Inventors: 陶金波
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-02-05
Anticipated expiration: 2030-05-29

Abstract

The embodiment of the utility model provides a bolt and nut subassembly relates to mechanical fastening technical field. The bolt-nut assembly comprises a bolt body, a fastener and a lock nut. The bolt body comprises a main threaded rod and a secondary threaded rod; the fastener is concavely provided with a reserved groove, the side wall of the reserved groove is provided with a thread spirally extending along the length direction of the reserved groove, the bottom of the reserved groove is provided with a through avoidance hole, the thread positioned on the main threaded rod is correspondingly in threaded fit connection with the thread positioned on the side wall of the reserved groove, the secondary threaded rod penetrates through and extends out of the avoidance hole, and the end face of the main threaded rod abuts against the bottom of the reserved groove; and the threaded hole of the locking nut is in threaded fit connection with the thread positioned on the secondary threaded rod. Because the preformed groove lateral wall is provided with the screw thread to with main threaded rod screw-thread fit, thereby reinforcing the frictional force between main threaded rod and the fastener, and the bottom of the terminal surface butt in preformed groove of main threaded rod forms the extrusion state, thereby guarantees the steadiness between main threaded rod and the fastener.

Description

Bolt and nut assembly

Technical Field

The embodiment of the utility model provides a relate to mechanical fastening technical field, specifically, relate to a bolt and nut subassembly.

Background

The bolt and the nut are mechanical parts, and the bolt and the nut can be used for fixedly connecting a plurality of parts in a matching mode, and the connection mode is called bolt connection.

Bolt connection is widely applied to machine equipment, however, when the bolt nut assembly in the prior art is assembled on a machine, looseness easily occurs between a bolt and a nut in the long-time operation process of the machine, so that parts on the machine are not stable.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a aim at providing a bolt and nut subassembly, can solve among the prior art bolt and nut subassembly and appear not hard up technical problem easily in the use.

The embodiment of the utility model provides an adopt following technical scheme:

a bolt-nut assembly comprising:

the bolt body comprises a main threaded rod and a secondary threaded rod, wherein threads are arranged on the outer side of the main threaded rod, the secondary threaded rod extends outwards from one end of the main threaded rod, and the threads are arranged on the outer side of the secondary threaded rod;

the fastener is concavely provided with a reserved groove, the side wall of the reserved groove is provided with a thread spirally extending along the length direction of the reserved groove, the bottom of the reserved groove is provided with a through avoidance hole, the thread positioned on the main threaded rod is correspondingly in threaded fit connection with the thread positioned on the side wall of the reserved groove, the secondary threaded rod penetrates through and extends out of the avoidance hole, and the end face of the main threaded rod abuts against the bottom of the reserved groove;

and the locking nut is provided with a threaded hole, and the threaded hole of the locking nut is in threaded fit connection with the thread positioned on the secondary threaded rod.

Optionally, the length of the preformed groove is set to be a preset length, and the length extension of the thread on the side wall of the preformed groove is set to be the preset length.

Optionally, the bolt-nut assembly further comprises a first clamping nut and a second clamping nut; the first clamping nut is in threaded fit connection with the main threaded rod, threads are arranged on the outer side surface of the fastener, the second clamping nut is in threaded fit connection with the outer side surface of the fastener, and the first clamping nut and the second clamping nut are abutted and fixed.

Optionally, the preformed groove is concavely arranged from one end face of the fastening piece along the length direction of the fastening piece.

Optionally, the primary threaded rod is cylindrical, a thread extends spirally along the length direction of the primary threaded rod, and the secondary threaded rod extends outwards at one end of the primary threaded rod in the length direction; the secondary threaded rod is cylindrical, and threads spirally extend along the length direction of the secondary threaded rod.

Optionally, one end of the primary threaded rod, which is far away from the secondary threaded rod, extends to be provided with a bolt cap, and the bolt cap, the primary threaded rod and the secondary threaded rod are integrally formed.

Optionally, the helical direction of the thread on the primary threaded rod is opposite to the helical direction of the thread on the secondary threaded rod.

Optionally, the pitch of the thread on the primary threaded rod is different from the pitch of the thread on the secondary threaded rod.

Optionally, the thread diameter of the secondary threaded rod is smaller than the thread diameter of the primary threaded rod, the aperture of the relief hole is larger than the thread diameter of the secondary threaded rod, and the aperture of the relief hole is smaller than the thread diameter of the primary threaded rod.

Optionally, the locking nut is provided with one or more through holes, and correspondingly, the fastener is provided with locking holes corresponding to the through holes; the bolt and nut assembly further comprises one or more fastening screws, and the fastening screws penetrate through the through holes and are in threaded fit connection with the locking holes.

Compared with the prior art, in the bolt nut subassembly of this embodiment, the bolt body is including linking main threaded rod and the secondary threaded rod that sets up as an organic whole. The fastener is concavely provided with a reserved groove, the side wall of the reserved groove is provided with an edge, the thread extends spirally in the length direction of the reserved groove, a through avoiding hole is formed in the bottom of the reserved groove, the thread of the main threaded rod is connected with the thread of the side wall of the reserved groove in a thread fit mode correspondingly, the secondary threaded rod penetrates through and extends out the avoiding hole, and the threaded hole of the locking nut is connected with the thread of the secondary threaded rod in a thread fit mode. So, main threaded rod screw in reserve groove the time threaded rod passes and stretches out dodge the hole, lock nut screw in time threaded rod. Because the preformed groove lateral wall is provided with the screw thread, and with main threaded rod screw-thread fit, thereby the reinforcing main threaded rod with frictional force between the fastener, and the terminal surface of main threaded rod supports holds the bottom of preformed groove forms the extrusion state, thereby guarantees main threaded rod with steadiness between the fastener, thereby reaches the technological effect that prevents not hard up.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic structural diagram of a bolt and nut assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a bolt and nut assembly according to another embodiment of the present invention;

FIG. 3 is a schematic structural view of the lock nut shown in FIG. 2;

fig. 4 is a schematic structural diagram of a bolt and nut assembly according to another embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like as used herein are used in the description to indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1-4, one embodiment of the present invention provides a locking bolt-nut assembly 100, in which the parts of the bolt-nut assembly 100 are connected with each other in a matching manner, so that the bolt-nut assembly 100 has strong stability.

Referring to fig. 1, the bolt-nut assembly 100 includes a bolt body 10, a fastener 20, and a lock nut 30. Bolt body 10 is the metal material, bolt body 10 includes main threaded rod 11 and secondary threaded rod 12, wherein, main threaded rod 11 is cylindrically the outside of main threaded rod 11 is provided with the edge 11 length direction spiral extension's of main threaded rod screw rod length direction ascending one end outwards extend has secondary threaded rod 12. The secondary threaded rod 12 is cylindrical, and threads spirally extending along the length direction of the secondary threaded rod 12 are arranged on the outer side of the secondary threaded rod 12, wherein the thread diameter of the secondary threaded rod 12 is smaller than that of the primary threaded rod 11. Further, a bolt cap 13 is extended from one end of the primary threaded rod 11 away from the secondary threaded rod 12, for example, the bolt body 10 is a hexagon bolt, that is, the cross section of the bolt cap 13 is a regular hexagon. Optionally, the bolt cap 13, the primary threaded rod 11 and the secondary threaded rod 12 are integrally formed, and can be formed by one-step casting through a casting process.

Wherein the screw direction of the screw thread of the primary screw rod 11 is opposite to the screw direction of the screw thread of the secondary screw rod 12. And/or the pitch of the thread of the primary threaded rod 11 is different from the pitch of the thread of the secondary threaded rod 12, for example, the pitch of the thread of the primary threaded rod 11 is greater than the pitch of the thread of the secondary threaded rod 12, or the pitch of the thread of the primary threaded rod 11 is less than the pitch of the thread of the secondary threaded rod 12.

In other embodiments, the screw direction of the thread of the primary threaded rod 11 is opposite to the screw direction of the thread of the secondary threaded rod 12, the pitch of the thread of the primary threaded rod 11 is the same as the pitch of the thread of the secondary threaded rod 12, or the screw direction of the thread of the primary threaded rod 11 is the same as the screw direction of the thread of the secondary threaded rod 12, and the pitch of the thread of the primary threaded rod 11 is different from the pitch of the thread of the secondary threaded rod 12.

The fastening member 20 is made of metal, and the outer contour of the fastening member 20 is in a regular geometric figure, for example, the cross section of the fastening member 20 is in a regular hexagon or a circle. A preformed groove 21 is concavely arranged from one end surface of the fastening piece 20 along the length direction of the fastening piece 20. In this embodiment, the preformed groove 21 is cylindrical, and the side wall of the preformed groove 21 is provided with a thread spirally extending along the length direction of the preformed groove 21, that is, the side wall of the preformed groove 21 is provided with an internal thread. In this embodiment, the size of the preformed groove 21 is adapted to the size of the main threaded rod 11, and the threads on the main threaded rod 11 are connected with the threads on the side wall of the preformed groove in a threaded fit manner, so that the main threaded rod 11 can be screwed into the preformed groove 21.

In this embodiment, the length of the reserve groove 21 is set to a predetermined length, and accordingly, the thread extension at the side wall of the reserve groove 21 is set to the predetermined length, thereby securing the stability between the main threaded rod 11 and the fastening member 20.

Further, the bottom of reservation groove 21 has seted up the hole of dodging 22 that link up, the aperture ratio of dodging hole 22 the thread diameter of secondary threaded rod 12 is big, and the aperture ratio of dodging hole 22 the thread diameter of main threaded rod 11 is little, so that secondary threaded rod 12 can pass dodge hole 22, and dodge hole 22 and hinder main threaded rod 11 passes, thereby fastener 20 can block bolt body 10 further to secondary threaded rod 12 one side removes, and the terminal surface of main threaded rod 11 supports and holds the bottom of reservation groove 21.

In other embodiments, the relief hole 22 is provided with threads, and the relief hole 22 is in threaded fit connection with the secondary threaded rod 12.

The locking nut 30 is made of metal, a threaded hole is formed in the locking nut 30, and the threaded hole of the locking nut 30 is in threaded fit connection with a thread located on the secondary threaded rod 12. Main threaded rod 11 screw in reserve groove 21 inferior threaded rod 12 passes and stretches out dodge hole 22, lock nut 30 screw in inferior threaded rod 12, thereby will bolt body 10 fastener 20 with lock nut 30 connects to be an overall structure, so that bolt and nut subassembly 100 has stronger steadiness, reaches and prevents not hard up technological effect.

Optionally, the bottom of the preformed groove 21 is made of an elastic material, and when the main threaded rod 11 abuts against the bottom of the preformed groove 21 or the locking nut 30 is screwed into the secondary threaded rod 12, the bottom of the preformed groove 21 made of the elastic material enables the bolt-nut assembly 100 to be more stable.

Further, referring to fig. 2-3, the locking nut 30 is provided with one or more through holes 31 therethrough, and accordingly, the fastening member 20 is provided with locking holes 23 corresponding to the positions of the one or more through holes 31. The bolt-nut assembly 100 further includes one or more fastening screws 50, and the fastening screws 50 pass through the through holes 31 and are in screw-fit connection with the locking holes 23 to enhance the firmness between the locking nut 30 and the fastening member 20. Optionally, the locking nut 30 is a hexagon nut, a threaded hole connected with the secondary threaded rod 12 in a threaded fit manner is formed in the middle of the locking nut 30, and if the through holes 31 are multiple, the through holes 31 are uniformly distributed along the circumference of the threaded hole of the locking nut 30.

Further, referring to fig. 4, the bolt-nut assembly 100 further includes a first clamping nut 61 and a second clamping nut 62. The first clamping nut 61 is in threaded fit connection with the main threaded rod 11, threads are arranged on the outer side surface of the fastener 20, and the second clamping nut 62 is in threaded fit connection with the outer side surface of the fastener 20. The first clamping nut 61 is screwed into the main threaded rod 11 (i.e. the first clamping nut 61 is in threaded fit connection with the main threaded rod 11), the second clamping nut 62 is in threaded fit connection with the outer side surface of the fastener 20, and the first clamping nut 61 and the second clamping nut 62 are held and fixed in a butting manner, so that the stability of the bolt-nut assembly 100 is enhanced.

In the present embodiment, a method for using the bolt-nut assembly 100 is provided, as follows:

first clamping nut 61 screw in main threaded rod 11, main threaded rod 11 screw in reserve groove 21 inferior threaded rod 12 passes and stretches out dodge hole 22, lock nut 30 screw in inferior threaded rod 12, second clamping nut 62 with the outside surface screw-thread fit of fastener 20 is connected, and first clamping nut 61 with it is fixed that support between second clamping nut 62. Because the preformed groove 21 can set up to preset length, correspondingly, be located the screw thread in the preformed groove 21 can set up to preset length, work as preformed groove 21 length is longer, can strengthen greatly main threaded rod 11 with frictional force between the fastener 20, and the terminal surface of main threaded rod 11 supports holds the bottom of presetting groove 21, forms the extrusion state, thereby guarantee main threaded rod 11 with steadiness between the fastener 20. Additionally, when the bolt body 10 has an abnormal loosening, the screw direction of the screw thread of the primary threaded rod 11 is opposite to the screw direction of the screw thread of the secondary threaded rod 12, so that the fastening member 20 and the lock nut 30 on the bolt body 10 are pressed relatively, or the primary threaded rod 11 is pressed against the bottom of the reserved groove 21, so that the bolt body 10, the fastening member 20 and the lock nut 30 are forced to be connected into a more stable integral structure, thereby achieving the technical effect of preventing the loosening.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A bolt and nut assembly, comprising:

2. The bolt-nut assembly defined in claim 1, wherein the length of the reserve groove is set to a preset length, and the length of the thread at the side wall of the reserve groove extends to the preset length.

3. The bolt-nut assembly defined in claim 1, further comprising first and second clamping nuts; the first clamping nut is in threaded fit connection with the main threaded rod, threads are arranged on the outer side surface of the fastener, the second clamping nut is in threaded fit connection with the outer side surface of the fastener, and the first clamping nut and the second clamping nut are abutted and fixed.

4. The bolt nut assembly defined in claim 1, wherein said pre-groove is recessed from an end surface of said fastener along a length of said fastener.

5. The bolt nut assembly defined in claim 1, wherein said primary threaded shaft is cylindrical, has threads extending helically along a length of said primary threaded shaft, and has said secondary threaded shaft extending outwardly at one end of said threaded shaft in a length direction; the secondary threaded rod is cylindrical, and threads spirally extend along the length direction of the secondary threaded rod.

6. The bolt-nut assembly defined in claim 5, wherein the end of the primary threaded shaft remote from the secondary threaded shaft extends with a bolt cap, the primary threaded shaft and the secondary threaded shaft being integrally formed.

7. The bolt-nut assembly defined in claim 1, wherein the helical direction of the thread on the primary threaded shaft is opposite to the helical direction of the thread on the secondary threaded shaft.

8. The bolt nut assembly defined in claim 1, wherein the pitch of the thread on the primary threaded shaft is different from the pitch of the thread on the secondary threaded shaft.

9. The bolt-nut assembly according to claim 1, wherein the thread diameter of the secondary threaded rod is smaller than the thread diameter of the primary threaded rod, the aperture of the avoiding hole is larger than the thread diameter of the secondary threaded rod, and the aperture of the avoiding hole is smaller than the thread diameter of the primary threaded rod.

10. The bolt nut assembly defined in claim 1, wherein the lock nut defines one or more through holes therethrough, and the fastener defines a locking hole corresponding to the one or more through holes; the bolt and nut assembly further comprises one or more fastening screws, and the fastening screws penetrate through the through holes and are in threaded fit connection with the locking holes.