CN200985997Y

CN200985997Y - Semi-nut chain transmission mechanism capable of self locking

Info

Publication number: CN200985997Y
Application number: CN 200620135198
Authority: CN
Inventors: 刘琰; 刘伟超; 龙纯祉
Original assignee: 713th Research Institute of China Shipbuilding Industry Corp
Current assignee: 713th Research Institute of China Shipbuilding Industry Corp
Priority date: 2006-12-25
Filing date: 2006-12-25
Publication date: 2007-12-05
Anticipated expiration: 2016-12-25

Abstract

The utility model relates to a half nut strip transmission mechanism, which comprises a half nut strip and a screw shaft. The screw shaft is connected with the machine frame through a bearing. The machine frame is provided with a motor, a deceleration machine connected with the motor, and a transition gear case. The screw shaft is connected with the transition gear case. The half nut strip transmission mechanism solves the equipment moving with big load for a long journey, and the utility model has big carrying ability, good equipment stability and a compact structure, and the utility model has small empty returning of the transmission chain, and the end of the transmission chain can be locked by self, which can meets the requirement of keeping stable state at any time for the equipment.

Description

But the half-nut strip transmission mechanism of self-locking

Technical field

The utility model belongs to transmission device, but relates in particular to a kind of half-nut strip transmission mechanism of self-locking.

Background technique

At present, the heavy driving mechanism of known long distance mainly contains gear-tooth bar transmission, leading screw-nut transmission.Gear-tooth bar transmission is to adopt tooth bar and gear in the transmission device, and increases the self-locking link to satisfy self-locking requirement in Transmitted chains.The modulus of gear is bigger during heavy duty, causes gear-box volume and weight excessive.And can not realize the self-locking of transmission latter end.Leading screw-nut transmission is made up of leading screw and nut, and leading screw and nut can rotate respectively or straight line motion, forms different working methods.For moving of long distance, often adopt leading screw to rotate, nut moves or leading screw is fixed, nut rotation and straight-line working method, leading screw is longer, and nut is shorter.Because load is big, stroke is big, and leading screw can only retrain at two ends, easily causes the leading screw unstability.

Summary of the invention

But the purpose of this utility model is to provide a kind of half-nut strip transmission mechanism of self-locking, and the equipment that solves long stroke heavy load moves, and bearing capacity is big, stabilization of equipment performance is good, and compact structure, and backlash of driving chain is little, the self-locking of Transmitted chains latter end can be satisfied the requirement that equipment keeps steady state at any time.

For achieving the above object, the utility model adopts following technological scheme: a kind of half-nut strip transmission mechanism, comprise half-nut bar and the screw axis that meshes with the half-nut bar, screw axis links to each other with frame by bearing, the speed reducer that motor is housed on the frame, links to each other with motor links to each other with the transition gear case with the transition gear case that links to each other with speed reducer, screw axis.

There is gib block at the edge of described half-nut bar, and the punch holder and the die holder that match with gib block are housed on the frame.

Encoder is housed on the frame, and encoder links to each other with screw axis.

Adopt the half-nut strip transmission mechanism of technique scheme, the length of half-nut bar can design according to need of work, the axial length of half-nut bar can be far longer than the axial length of lead screw shaft, because the half-nut bar can be completely fixed on the basis vertically, and the axial length of lead screw shaft is shorter, therefore unstable phenomenon can not occur.The screw thread of half-nut bar and lead screw shaft can adopt the standard thread form, is easy to processing.When half-nut bar and lead screw shaft employing self-locking thread, can realize self-locking.Because half-nut bar and lead screw shaft are in the Transmitted chains least significant end, so transmission can realize the latter end self-locking, makes the compact structure of power-driven system, and backlash of driving chain is little.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 looks schematic representation for the left side of Fig. 1.

Fig. 3 is the schematic top plan view of Fig. 1.

Fig. 4 is the working state schematic representation of screw axis and half-nut bar.

Fig. 5 is for using the structural representation of lowering or hoisting gear of the present utility model.

Embodiment

As Fig. 1, Fig. 2, Fig. 3, half-nut strip transmission mechanism shown in Figure 4, comprise half-nut bar 11 and with the screw axis 12 of half-nut bar 11 engagements, there is gib block 13 at the edge of half-nut bar 11, half-nut bar 11 is fixed on the basis by adjusting parallels 31.Screw axis 12 links to each other with frame 36 by bearing, motor 39, harmonic wave speed reducing machine 38 and the transition gear case 34 that links to each other with harmonic wave speed reducing machine 38 are housed on the frame 36, motor 39 links to each other by bolt with harmonic wave speed reducing machine 38 shells, interior axle transmitting movement, transition gear case 34 links to each other with harmonic wave speed reducing machine 38 by coupling 37, and screw axis 12 links to each other with transition gear case 34 by shaft coupling 33.The punch holder 32 and the die holder 35 that match with gib block 13 are housed on the frame 36.Encoder 32 also is housed on the frame 36, and encoder 32 links to each other with screw axis 12 by shaft coupling.

Half-nut bar 11 adopts complete internal thread to form along the diameter subdivision, and profile and length design on demand.Half-nut bar 11 is fixed on the basis by adjusting parallels 31, adjusts the perpendicularity that parallels 31 can be adjusted half-nut bar 11.Motor 39 rotates and drives harmonic wave speed reducing machine 38 rotations, after slowing down, harmonic wave speed reducing machine passes motion to transition gear case 34 by coupling 37, the transition gear case back of slowing down passes motion to lead screw shaft 12 by shaft coupling 33, and lead screw shaft 12 is rotated and along half-nut bar 11 moving linearlies.Lead screw shaft 12 rotatablely moves with respect to frame 36, and frame 36 and lead screw shaft 12 be jointly along half-nut bar 11 moving linearlies, and is led by punch holder 32 and die holder 35.

As shown in Figure 5, lowering or hoisting gear is formed by connecting by platform stage body 21 driving mechanism 22 identical with quadruplet.Platform stage body 21 links to each other by flexible connecting device 310 with every sets of transmission mechanism 22 respectively, many sets of transmission mechanism together support working platform carries out straight line motion, and, guarantee the synchronism of multiple spot motion by control system by the synchronized movement situation of encoder feedback driving mechanism.

Because half-nut bar and lead screw shaft can adopt self-locking thread as required, therefore can realize the terminal self-locking requirement in the working platform motion.The half-nut bar can be completely fixed on the basis, and lead screw shaft length is shorter, the unstable phenomenon that conventional helical transmission meeting occurs can not occur, so its transmission distance is bigger, and bearing capacity also improves a lot.

Claims

1, a kind of half-nut strip transmission mechanism, it is characterized in that: comprise half-nut bar and the screw axis that meshes with the half-nut bar, screw axis links to each other with frame by bearing, the speed reducer that motor is housed on the frame, links to each other with motor links to each other with the transition gear case with the transition gear case that links to each other with speed reducer, screw axis.

2, half-nut strip transmission mechanism as claimed in claim 1, it is characterized in that: there is gib block at the edge of described half-nut bar, and the punch holder and the die holder that match with gib block are housed on the frame.

3, half-nut strip transmission mechanism as claimed in claim 1 or 2 is characterized in that: encoder is housed on the frame, and encoder links to each other with screw axis.