CN201301859Y

CN201301859Y - A fixing device

Info

Publication number: CN201301859Y
Application number: CNU2008201239715U
Authority: CN
Inventors: 吴满立; 孔令灏; 张翼鹏
Original assignee: Beijing Aeonmed Co Ltd
Current assignee: Beijing Aeonmed Co Ltd
Priority date: 2008-12-01
Filing date: 2008-12-01
Publication date: 2009-09-02
Anticipated expiration: 2018-12-01

Abstract

The utility model provides a fixing device which is used for fixing a first work piece with a second work piece mutually; the fixing device comprises a first screw, a second screw and an outer sleeve nut; wherein, the outer thread direction of the second screw is opposite to the outer thread direction of the first screw; the first screw is threaded through the inner thread hole of the second screw and is extended out of a screw cap of the second screw; the second screw is threaded through a through hole of the first work piece and is screwed into the outer sleeve nut; the extended part of the first screw is screwed into the thread hole of the second work piece. According to the fixing device in the utility model, as the first screw and the second screw are provided with threads in opposite directions and can be locked with each other; and the outer sleeve nut is nested on the periphery of the first screw, compared with prior art, the fixing device can lock work pieces simply and conveniently and effectively prevent looseness; meanwhile, the fall-off situation of the first screw is prevented during the repeated disassembly and assembly process of two work pieces.

Description

Fixing device

Technical field

The utility model relate to a kind of can interlocking and prevent the fixing device become flexible, relate in particular to a kind of stopping screw of connecting between two workpiece of being used for.

Background technique

At present, industrial screw check retaining mode commonly used has a variety of, backing-up screw, firm glue backing-up screw are arranged usually, these traditional backing-up screws all exist can be lost possibility after disassembling, and the chance of recycling is also few, and particularly under situation about can't see during knockout screw, this screw is easy to come off, also lose easily during dismounting, bring a lot of inconvenience.

The model utility content

The utility model is devoted to overcome the above-mentioned defective of prior art just and is made.The utility model is intended to propose a kind of novel fixing device.

For achieving the above object, the utility model provides a kind of fixing device, is used for first workpiece and second workpiece fixed to one anotherly, and wherein, described fixing device comprises: have direction opposite externally threaded first screw and second screw; And cap nut, wherein, described first screw passes the interior threaded hole of described second screw and stretches out outside the nut of described second screw, described second screw passes the through hole of described first workpiece and is screwed in the described cap nut, and the part of stretching out described second screw nut of described first screw is screwed in the tapped hole of described second workpiece.

Preferably, when described first workpiece and described second workpiece tighten together by described fixing device, the length of described cap nut is greater than the distance between the nut of the first surface of described first workpiece and described first screw, and described first surface contacts with described cap nut.

Preferably, an end relative with its screw socket of described cap nut offers through hole, and the diameter of described through hole is less than the diameter of the nut of described first screw.

Preferably, the through hole of described first workpiece is a slotted hole.

Preferably, the external threaded surface of described second screw has radially relative planar section.

Preferably, the outside thread of described second screw is a left-handed thread.

Because first screw and second screw are that the positive left-hand thread screw thread interlocked relationship and the first screw periphery are with cap nut, therefore compared with prior art, can simplyr lock workpiece more easily, effectively prevent to become flexible, and when two workpiece of repeated disassembled and assembled, can not cause the first screw loosening obscission; When dismantling first screw under this external situation about can't see outside cap nut, this first screw also is not easy to come off out.

Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is in order to provide further instruction to claimed the utility model.

Description of drawings

Accompanying drawing is formed the part of this specification, with helping further understand the utility model.These accompanying drawings illustrate embodiments more of the present utility model, and can be used for illustrating principle of the present utility model with specification.In the accompanying drawing:

Fig. 1 is the assembling section according to the utility model first embodiment's fixing device;

Fig. 2 is the utility model first an embodiment's shown in Figure 1 assembling perspective exploded view;

Fig. 3 is the assembling schematic exploded perspective view according to another embodiment's of the utility model fixing device.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.Identical in the accompanying drawings parts are represented with identical label.

Fig. 1 is the assembling section according to the utility model first embodiment's fixing device, and Fig. 2 is the utility model first an embodiment's shown in Figure 1 assembling perspective exploded view.As depicted in figs. 1 and 2, the utility model is first embodiment provide a kind of fixing device, is used for first workpiece 1 and second workpiece 2 are fixed together.This fixing device comprises first screw 3, second screw 5 and cap nut 4.First screw 3 is screwed in the interior threaded hole 52 of second screw 5, and passes outside the nut 56 that this interior threaded hole stretches out second screw 5.In the utility model, first screw 3 and second screw 5 have the opposite outside thread of direction.Here, for convenience of fabrication and processing, first screw 3 adopts common dextrorotation outside thread, and second screw 5 adopts the opposite sinistral external thread of directions.As shown in Figure 1, second screw 5 passes in the through hole 12 of first workpiece 1 and is tightened in cap nut 4 by its sinistral external thread 54.The part of stretching out second screw, 5 nuts 56 of first screw 3 is screwed in the tapped hole 22 of second workpiece 2.

In addition, locate to have the hole, so that tighten or dismantle backing-up screw 3 such as the instrument of screwdriver by this hole use at an end relative (that is) of cap nut 4 away from an end of first workpiece 1 with its screw socket.Preferably, the diameter in this hole comes off from this hole to prevent backing-up screw 3 less than the diameter of the nut 32 of backing-up screw 3.

And, when first workpiece 1 and second workpiece 2 being screwed in a time-out by fixing device, the length L of cap nut 4 is greater than the distance H between the nut 32 of the first surface 14 of first workpiece 1 and first screw 3, so that first screw 3 can be back-outed from workpiece during the dismounting fixing device and prevented that first screw 3 from coming off.

Because first screw 3 and second screw 5 are that positive left-hand thread screw thread interlocked relationship and first screw, 3 peripheries are with cap nut 4, therefore compared with prior art, can simplyr lock workpiece more easily, effectively prevent to become flexible, and when two workpiece of repeated disassembled and assembled, can not cause first screw, 3 loose or dislocation phenomenons; When dismantling first screw 3 under this external situation about can't see outside cap nut 4, this first screw 3 also is not easy to come off out.

Fig. 3 is the assembling decomposing schematic representation according to second embodiment of the present utility model.Similar to the fixing device shown in Fig. 2, first screw 30 is after second screw 50 is screwed in, second screw 50 is inserted in the through hole 120 of first workpiece 10, second screw 50 is tightened in cap nut 40 by its sinistral external thread, second workpiece 20 that will be threaded hole 22 afterwards is corresponding with first screw 30, uses such as stubborn first screw 30 of the instrument of cross screwdriver to be tightened until second workpiece 20.In this embodiment, this through hole 120 is a slotted hole, so that regulate the relative position between two workpiece, and partly there are two radially relative planes (only showing one of them plane 542 among Fig. 3) in the sinistral external thread of second screw 50, when inserting second screw 50 in the slotted hole 120, these two opposite planar are relative with the flat surface of this slotted hole, thereby prevent that second screw 50 from rotating, and increased the using scope of fixing device, and improved fixed effect.

Although the utility model is illustrated with reference to accompanying drawing and preferred embodiment, obviously, for a person skilled in the art, under the prerequisite that does not deviate from spirit and scope of the present utility model, can make various changes and variation to the utility model.Various change of the present utility model, the content that changes by appending claims and equivalent thereof contain.

Claims

1. fixing device is used for first workpiece (1) and second workpiece (2) fixed to one anotherly, it is characterized in that described fixing device comprises: have opposite externally threaded first screw (3) of direction and second screw (5); And cap nut (4), wherein, described first screw (3) passes the interior threaded hole (52) of described second screw (5) and stretches out outside the nut (56) of described second screw, described second screw (5) passes the through hole (12) of described first workpiece (1) and is screwed into described cap nut (4), and the part of stretching out outside described second screw (5) nut (56) of described first screw (3) is screwed in the tapped hole (22) of described second workpiece (2).

2. fixing device according to claim 1 is characterized in that, an end relative with its screw socket of described cap nut (4) offers through hole, and the diameter of described through hole is less than the diameter of the nut (32) of described first screw (3).

3. fixing device according to claim 1 is characterized in that, the through hole (12) of described first workpiece (1) is a slotted hole.

4. the fixing device of stating according to claim 3 is characterized in that, the external threaded surface of described second screw (5) has radially relative planar section.

5. fixing device according to claim 1 is characterized in that, the outside thread of described second screw (5) is a left-handed thread.