CN206929178U - Bolt fastening structure - Google Patents

Abstract

The utility model relates to a bolt connection structure, comprising a screw with external thread and a nut, the nut is set on the screw, the screw includes a locking end and an elastic end, the nut is set on the screw The locking end, the end of the elastic end is a tapered head, and the diameter of the large end of the tapered head is larger than the diameter of the screw rod, the elastic end is provided with a slot, and the slot is along the The elastic end penetrates radially, and the elastic end can produce elastic deformation toward the slot hole. The bolt connection structure also includes an L-shaped locking rod, and a through hole is opened along the axis at the center of the axial direction of the screw rod. One end of the locking rod is located in the through hole, and the other end of the locking rod is placed outside the screw to realize the insertion and extraction of the locking rod. The placement of the nut and the fastening of the nut are two operations of a new type of bolted connection structure.

Description

Bolted connection structure

technical field

The utility model relates to a bolt connection structure.

Background technique

In the connection of components, bolt connection is the most commonly used connection method. Please refer to accompanying drawing 1, common bolt structure comprises a screw rod 100 and a nut 200, and screw rod 100 is provided with external thread, and one end of screw rod is provided with a nut 101 at the same time, when using, firstly screw rod 100 needs locking bolt holes reserved on the components, and then connect the nut 200 to the screw 100 until it is tightened, so that the components that need to be locked can be connected through the connection of the screw 100 and the tightening between the nut 101 and the nut 200 to realize its effective connection .

In the most common bolt connection structure, the nut 101 and the screw 100 are integrally structured, and the nut 101 is located at one end of the screw 100, and in the assembly process, after the screw 100 passes through the reserved bolt hole, the nut 101 acts as a stop, and at the same time, the nut 200 is fastened to the screw rod 100, so that the nut 200 and the nut 101 clamp the components to be locked between them, the nut 200 is continuously tightened, and the components are continuously locked.

Further analysis shows that in the above bolt connection operation, there are the following problems: first, the operation of the screw 100 penetrating the bolt hole and the operation of locking the nut 200 must be completed separately from the opposite sides of the components to be locked. When the tight bolt hole is in the vertical direction and close to the ground, or in a narrow position such as one side of the bolt hole with connection near the corner, it is necessary to perform the operation of the screw rod 100 passing through the bolt hole or the operation of locking the nut 200. At least one of them must have the problems of difficult operation and inconvenient operation; in addition, when the nut 200 is locked and operated, in order to ensure that the screw rod 100 does not come out from the side where it is assembled, it is necessary to hold the nut with a tool or hand on this side. 101, to ensure that the locking process of the nut 200 is effectively operated, and thus there is also the problem of cumbersome and inconvenient operation.

Contents of the invention

Based on the consideration of the above-mentioned problems, the utility model provides a bolt connection structure, which can solve the problem that in the prior art bolt connection, the two operations of assembling the screw rod and the locking nut must be locked separately. It is difficult and inconvenient to operate on the opposite sides of the components; and it is cumbersome and inconvenient to complete the nut locking operation with the help of tools or against the nut by hand.

A bolt connection structure, comprising a screw rod with external threads and a nut, the nut is sleeved on the screw rod, the screw rod includes a locking end and an elastic end, the nut is sleeved on the locking end , the end of the elastic end is a tapered head, and the diameter of the large end of the tapered head is larger than the diameter of the screw, the elastic end is provided with a slot, and the slot is along the radial direction of the elastic end Through, the elastic end can be elastically deformed toward the slot.

Further, the bolt connection structure also includes an L-shaped locking rod, and a through hole is opened along the axis at the center of the screw rod axially. One end of the locking rod is located in the through hole, and the other end is outside the through hole. Placed on the outside of the screw to realize the insertion and extraction of the locking rod.

The beneficial effects produced by the utility model are:

In the bolt connection structure described in the present invention, in terms of structural design, the nut used to realize the shift in the prior art is changed to a conical head, and the conical head is designed as an elastic structure, through the elastic The deformability of the structure enables the conical head to penetrate from any side of the member to be locked to the other side when the deformation occurs, so that the two operations of placing the screw and locking the nut can be realized It is completed on the same side of the component to be locked, thereby solving the problem of difficult and inconvenient operation in the prior art bolted connection that the two operations must be performed on opposite sides of the component to be locked; in addition In this application, the nut is pre-set on the screw rod before the screw rod placement operation. When the elastic deformation of the conical head is used to make the screw rod pass through the components to be locked, the two components to be locked The gears formed by the tapered head and the nut on both sides have been formed respectively, and the connection of the components to be locked can be completed only by properly adjusting the locking position of the nut, thus effectively solving the problem of the prior art In the nut locking operation, it is necessary to use tools or push the nut by hand to complete the cumbersome and inconvenient operation. In addition, the setting of the L-shaped locking rod in this application is located at the place where the locking connection is required. In the through hole on the screw rod, the elastic part cannot produce elastic deformation to ensure the effectiveness of locking. When disassembling, the L-shaped locking rod is first pulled out to restore the elastic deformation performance of the elastic part. Make disassembly simple and convenient.

Description of drawings

In order to illustrate the technical solution of the utility model more clearly, the utility model will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a diagram of existing bolt structure components.

Fig. 2 is a diagram of the basic structural components of the bolt connection structure of the present invention.

Fig. 3 is an assembly diagram of the basic structure of the bolt connection structure of the present invention.

Fig. 4 is a component diagram of the optimized structure of the bolted connection structure of the present invention.

Fig. 5 is a cross-sectional view of the optimized structure of the bolted connection structure of the present invention - a screw.

Fig. 6 is an assembly diagram of an optimized structure of the bolted connection structure of the present invention.

Fig. 7 is an assembly cross-sectional view of an optimized structure of the bolt connection structure of the present invention.

Fig. 8 is a cross-sectional view of the second screw of the optimized structure of the bolted connection structure of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the bolt connection structure of the utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

This embodiment is used to specifically describe the bolted connection structure described in this application in conjunction with the accompanying drawings.

Please refer to FIG. 2 and FIG. 3 , which are diagrams illustrating the components of the bolt connection structure described in the present invention. The bolt connection structure includes a screw rod 1 with external threads and a nut 2. The screw rod 1 includes a lock Tight end 11 and an elastic end 12, the nut 2 is sleeved on the end of the screw 1 close to the locking end 11, the end of the elastic end 12 is a tapered head 121, and the The diameter of the large end of the tapered head 121 is larger than the diameter of the screw rod 1, and the elastic end 12 is provided with a cross-shaped slot 122, and the slot 122 penetrates radially along the elastic end 12, and the elastic end 12 can be Elastic deformation occurs toward the slot 122 .

Further, the large end of the tapered head 121 is a plane 1211 , and the plane 1211 is perpendicular to the outer peripheral surface of the screw 1 . Thus, when the screw 1 and the nut 2 are assembled in the connecting hole, since the plane 1211 is perpendicular to the outer peripheral surface of the screw 1, the plane 1211 can be aligned with the connecting hole. The better resisting effect ensures that the bolted connection structure described in this application achieves better locking effect; and the setting of the conical head 2 makes the screw rod 1 have better locking effect when assembled into the connecting hole. Through the effect, so that the assembly process is easier and simpler.

Of course, in addition to this, the cross-shaped slots can also be other slot shapes according to the needs of practical applications, such as straight slots, star-shaped slots or others.

Obviously, the role of the tapered head 121 in this application is not only to achieve resistance after assembly, but also to achieve a better penetrating effect through the design of the tapered shape, making assembly easier and simpler; thus It can be seen that the tapered head 121 can also be designed with many deformations and extensions in the actual application process. As long as the technical effects described in this application can be achieved, it should be classified as belonging to the scope of this application.

Further, the axial distance between the plane 1211 and the nut 2 is the locking length of the bolted connection structure described in this application. Adjusting the position of the nut 2 on the screw 1 can achieve different locks. combined length. Therefore, the locking length of the bolt connection structure described in the present application is estimated before assembly, and after being assembled in the connecting hole, nut adjustment is performed until the actual required locking length is achieved.

Preferably, the slot 122 is located at the center of the radial section of the elastic end 12 and is a cross-shaped slot. Thus, one end of the tapered head 121 is equally divided into four parts by the cross-shaped slot, which not only makes the elastic deformation produced by the elastic end 12 uniform, but also makes the deformation provided by the cross-shaped slot The allowance space is also uniform; at the same time, the size of the cross-shaped slot can be adjusted according to actual application needs, so as to be suitable for elastic deformation of different needs and to provide deformation allowance space of different needs; thus, it can ensure that the The convenience of assembly of the bolted connection structure in practical applications, as well as the flexibility of structural design.

It should be noted that the bolted connection structure described in this application is usually used for fastening connections to components or component combinations. In specific structures, the components or component combinations are respectively provided with corresponding connection holes. After the nut 1 is set on the locking end 11, the tapered head 121 is assembled and inserted into the connecting hole through the elastic structure design of the elastic end and the setting of the slot hole 122, thus With the continuous insertion of the tapered head 121, the elastic end 12 is elastically deformed toward the slot 122, so that the screw 1 penetrates through the connecting hole, and is elastically connected to the elastic end 12 when penetrating. recovery, the tapered head 121 abuts against the connection hole; further adjust the position of the nut 2 to realize the fastening of the components and component combinations; and when the bolted connection structure is disassembled, continue The nut 2 is tightened so that the elastic end 12 is elastically deformed under the action of the axial locking force, and through the connecting hole, the nut 2 is disengaged from the connecting hole together with the nut 2 .

The bolted connection structure described above is the basic structural form of the present application, but in practical applications, the basic structural form can be optimized and changed in various forms.

Embodiment two

Please refer to Fig. 4 to Fig. 7, which illustrate the second embodiment of the bolt connection structure described in the present invention. The bolt connection structure also includes an L-shaped locking rod 3, and the axial center of the screw rod 1 A through hole 13 is also defined along the axis, one end of the locking rod 3 is located in the through hole 13 , and the other end is placed outside the screw 1 to realize the insertion and extraction of the locking rod 3 .

Preferably, the elastic end 12 is a truncated cone, and the small end of the truncated cone is connected to the locking end 11, and the through hole 13 is also a circle at the elastic end 12. The trapezoidal hole, so that the wall thickness of the elastic end 12 is evenly distributed.

Obviously, the frustum-shaped structure of the outer peripheral surface of the elastic end 12, and the portion of the through hole 13 corresponding to the elastic end 12 is also a frusto-conical structure, so that the wall thickness of the elastic end 12 is uniform, and this band The structural design with slope and uniform wall thickness can obviously provide better elastic deformation performance, and at the same time, the through hole 13 is in the shape of a truncated cone, which further provides a larger room for the elastic deformation of the elastic end 12 , so that the elastic end 12 can be fully deformed.

For the through hole 13, it is located at the axial center of the screw rod 1 and runs through the screw rod 1. In this embodiment, the shape of the through hole 13 is circular. In addition, the through hole 13 may also be in other shapes, only in terms of structure, the shape of the through hole 13 needs to match and correspond to the shape of the locking rod 3 .

In the bolt connection structure described in the preferred embodiment of the present application, the setting of the slot 122 not only makes the end of the tapered head 121 on the screw 1 elastically deform toward the slot 122 At the same time, the setting of the slot 122 and the through hole 13 also provides a space for the elastic deformation, so that when the screw 1 is assembled into the corresponding connection hole, the elastic deformation can , through the connection hole whose diameter is smaller than the diameter of the large end of the tapered head 121, it provides convenience for the assembly of the screw 1, so that it can be loaded from any side of the connection hole, and the assembly is very flexible; and The L-shaped locking rod 3 described in this application is set in consideration of the reliable connection and fastening of the assembled bolt connection structure. When the screw rod 1 and the nut 2 are assembled in place, the L-shaped locking rod 3 The type locking rod 3 is installed into the through hole 13, thereby resisting the elastic deformation acceptance space at one end of the tapered head 121, so that the tapered head 121 cannot produce elastic deformation, so that the tapered The head 121 is very stable and reliable against the connecting hole and will not come out of the connecting hole.

Embodiment three

Please refer to FIG. 8 , which is an illustration of Embodiment 3 of the present application. Compared with Embodiment 2 of the present application, the optimization of this structure is that the plane 1211 is set as an inclined surface 1211', the inclined surface 1211' is in contact with the outer peripheral surface of the screw 1, and the inclined surface 1211' The slope is not more than 20 degrees.

Obviously, the setting of the slope 1211' is to facilitate the disassembly of the bolt connection structure after it is connected to the connection hole; refer to the first embodiment for the assembly of the bolt connection structure and the connection hole and It can be seen from the disassembly relationship that when the conical head 121 and the outer peripheral surface of the screw 1 are connected by the planes 1211 perpendicular to each other, in the further fastening process of the nut 2, the elasticity must be realized. The deformation of the end 12 and the detachment from the connecting hole require a large locking force, and if the conical head 121 is connected with the outer peripheral surface of the screw 1 by the inclined surface 1211', the In the further locking process of the nut 2, due to the wedging effect of the inclined surface, the tapered head is more likely to produce elastic deformation, so that the deformation of the elastic end 12 can be realized under the action of a small locking force and release from the connecting hole.

It should be noted that the three embodiments listed in this application should be understood in combination with each other. In a preferred embodiment of the present application, the technical design concept is to flexibly control whether the elastic end has elastic deformation performance through the locking rod, and to flexibly apply the elastic deformation performance.

The embodiment of the utility model only lists a structural form of the bolted connection structure. Obviously, the bolted connection structure is not limited to the above embodiments. In the application of the connector between components, any All kinds of structures extended by referring to the bolt connection structure described in this application can be understood as changes and expansions based on the ideas of the present utility model, and should belong to the protection category of this application.

Claims (7)

1. a kind of bolt fastening structure, including one carries externally threaded screw rod and a nut, and the nut sleeve is loaded on the screw rod On, it is characterised in that：The screw rod includes a locking end and an elastic tip, and the nut sleeve is loaded on the locking end, the bullet The end at property end is a conical nose, and the conical nose outside diameter is more than the screw diameter, and the elastic tip opens up There is a slotted eye, the slotted eye extends radially through along the elastic tip, and the elastic tip can produce elastic deformation towards the slotted eye.

2. bolt fastening structure as claimed in claim 1, it is characterised in that：The bolt fastening structure also includes a L-type and locked Gu bar, also offering a through hole along axis at the center of the screw rod axial direction, described locking lever one end is located in the through hole, its The other end is placed on the outside of the screw rod to realize the plug of the locking lever.

3. bolt fastening structure as claimed in claim 2, it is characterised in that：The elastic tip is a truncated cone-shaped, and with it is described Locking end joint is the small end of the truncated cone-shaped, and the through hole is also a truncated cone-shaped hole at the elastic tip, so as to described Elastic tip uniform wall thickness is distributed.

4. the bolt fastening structure as described in any one of claims 1 to 3, it is characterised in that：The big end of conical nose is one Plane, and the plane is mutually perpendicular to the screw rod outer peripheral face.

5. bolt fastening structure as claimed in claim 4, it is characterised in that：The plane also can be an inclined-plane, the inclined-plane Connect with the screw rod outer peripheral face, and the slope is not more than 20 degree.

6. bolt fastening structure as claimed in claim 5, it is characterised in that：Between the plane and the nut axially away from From the sealed length for the bolt fastening structure, adjust position of the nut on the screw rod can realize it is different sealed Length.

7. bolt fastening structure as claimed in claim 6, it is characterised in that：The slotted eye is located at the elastic tip radial section At center, and it is cross slotted eye, yi word pattern slotted eye or star-like slotted eye.