CN1078774A

CN1078774A - Screws with left and right overlapping threads and their fittings

Info

Publication number: CN1078774A
Application number: CN 93104833
Authority: CN
Inventors: 林清富
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-14
Filing date: 1993-05-14
Publication date: 1993-11-24

Abstract

The invention relates to a threaded connection, in particular to a threaded connection for preventing looseness. It includes a screw rod, levogyration closes piece and dextrorotation and closes piece, characterized by: the right thread and the left thread which are overlapped are arranged on the screw rod, and one starting end of the right thread and the left thread is arranged on the end surface of the screw rod and is respectively a right rotating assembly and a left rotating assembly which are rotatably combined with the starting end, so that the thread connection can be mutually reversed and locked, the locking is reliable, the cost is reduced, and in addition, a transmission part used for rapidly moving the jaw is arranged on the clamp.

Description

The screw rod of left and right overlapped helical groove and screwing unit thereof

The present invention relates to a kind of scyewed joint, especially refer to prevent the scyewed joint of becoming flexible.

At present, have a left side or right-hand thread on the common screw rod, also have at the difference place of screw rod and have left hand thread and right-hand thread respectively,, have to add auxiliary component for requiring locking scyewed joint, common way: the nut with two identical hand of spirals is connected on the screw rod, or so that ditch nut and latch to be arranged, or with spring washer or tab washer, these methods not only make the manufacture cost of scyewed joint improve, and locking is also reliable, occurs loosening often in vibration or impact; In addition, common anchor clamps or vice jaw unclamp, when clamping, lean on the rotation of screw rod, and the single nut that matches is moved, and the time of cost is too many.

In view of this, the objective of the invention is to provide a kind of screw rod and screwing unit thereof of left and right overlapped helical groove, can make scyewed joint break through locking mutually, can also make the left and right screwing unit on the screw rod realize drawing close fast or separating.

The object of the present invention is achieved like this: it comprises a left-handed component of screw rod and dextrorotation component, on screw rod, have overlapping right-hand thread and left hand thread, and right-hand thread and left hand thread respectively have one to open top at the screw rod end face, are respectively the dextrorotation component, left-handed component screws starting point.

Owing to adopt such scheme: checknut connects cost to be reduced, and reliable lock, and in addition, being used in can the fast moving jaw on the anchor clamps.

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the exploded view of first embodiment of the invention.

Fig. 2 is the connection diagram of first embodiment of the invention.

Fig. 3 is the exploded view of second embodiment of the invention.

Fig. 4 is the connection diagram of second embodiment of the invention.

Fig. 5 is used for bolt, nut connection diagram for first embodiment of the invention.

Fig. 6 is used for bolt, nut connection diagram for second embodiment of the invention.

Fig. 7 closes up generalized section for the jaw that the present invention is used for anchor clamps.

Fig. 8 opens generalized section for the jaw that the present invention is used for anchor clamps.

As shown in Figure 1 and Figure 2, on a screw rod 1, be provided with overlapping right-hand thread 11 and left hand thread 12, and right-hand thread 11 is an equal pitch thread with left hand thread 12, and it at least respectively opens top at screw rod 1 end face, screw starting point as dextrorotation component (having right-hand thread) 2, left-handed component (having left hand thread) 3 respectively, so that dextrorotation component 2 and left-handed component 3 screw on screw rod 1.

As shown in Figure 3, Figure 4, a screw rod 1 ' on be provided with overlapping right-hand thread 11 ' and left hand thread 12 ', and right-hand thread 11 ' with left hand thread 12 ' be different pitch screws, and it at least respectively opens top at screw rod 1 ' end face, respectively as dextrorotation component (having right-hand thread) 2 ', left-handed component (having left hand thread) 3 ' screw starting point so that dextrorotation component 2 ' and left-handed component 3 ' screw screw rod 1 ' on.

As Fig. 5, shown in Figure 6, on bolt 1, have overlapping uniform pitch right-hand thread 11 and left hand thread 12, screw the right-handed screw cap 2 and the left-handed screw cap 3 that match on it, equally, bolt 1 ' on have overlapping different pitch right-hand threads 11 ' and left hand thread 12 ', screw on it the right-handed screw cap 2 that matches ' and left-handed screw cap 3 ', utilize rotation to nut, can reach the counter locking effect.

As Fig. 7, shown in Figure 8, the screw rod 4 of anchor clamps is limited can do on present 40 the location and rotates, the one end with hold 41 and combine, but utilize handle 41 drive screws 4 to rotate, on the seat 40 grooved rail 42 is arranged, can move for two lugs 43,44, have right-hand thread and left hand thread respectively on two lugs 43,44, screw on the right-hand thread and left hand thread on the screw rod 4, therefore, when handle 41 rotates, the change that 43,44 of two lugs turn to because of handle 41, can reach fast near or separately, clamp or unclamp workpiece for jaw.

Claims

1. A screw with overlapping left and right threads and its screw joint, including a screw left screw joint and a right screw joint, with overlapping right and left threads on the screw, and the right and left threads respectively There is a starting end on the end surface of the screw rod, which are respectively the starting ends of the right-handed joint and the left-handed joint.

2. The screw with overlapping left and right threads and its screw fittings according to claim 1, characterized in that: the pitch or depth of the overlapping left and right threads on the screw are different.

3. The screw with overlapping left and right threads and its screw fittings according to claim 1, characterized in that: the pitch or depth of the overlapping left and right threads on the screw are the same.