CN201772036U

CN201772036U - Nut capable of miniature gap adjustment

Info

Publication number: CN201772036U
Application number: CN2010205365095U
Authority: CN
Inventors: 吴为居
Original assignee: NANJING CHANGQING PRECISION SCREW MANUFACTURE CO Ltd
Current assignee: NANJING CHANGQING PRECISION SCREW MANUFACTURE CO Ltd
Priority date: 2010-09-17
Filing date: 2010-09-17
Publication date: 2011-03-23
Anticipated expiration: 2020-09-17

Abstract

The utility model discloses a nut capable of micro-adjustment to gap essentially comprising a nut body which is in screw-thread connection to a screw rod, wherein the nut body is composed of a main half nut with inner cylindrical surface and a sub half nut with outer cylindrical surface which are in gap sleeve connection to each other, a torsion spring being clamped between the main half nut and the sub half nut. The utility model abandons prior art nut structure which is incapable of automatic adjustment to gap. The design of the utility model combines a main half nut and a sub half nut in gap sleeve connection and adopts a torsion spring for between the two for retaining and connecting the two. As a gap appears to the screw rod due to wearing, the torsion spring will screw the sub half nut with outer cylindrical surface to rotate towards left or right at a certain angle so as to automatically eliminate the gap. Even if the system torque appears as the minimum value, the utility model can make the screw rod to main the rigidity in usage. The utility model finds especial application to control system in precision motion.

Description

Miniature accent crack nut

Technical field

The utility model relates to the architecture advances of screw pair, especially refers to the architecture advances of nut.

Background technique

Screw pair structure of the prior art as shown in Figure 3, the screw mandrel 1 ' and the nut 2 ' that are spirally connected very easily movement clearance occurs because of wearing and tearing in movement process, movement clearance can strengthen the linear motion positioning error and duplicate the location, has caused problems such as noise is big, kinematic accuracy attenuating.The method that solves this clearance issues is also arranged in the prior art, but still have the problem that the Component replacing bothers, cost of production is high.

The model utility content

At the defective that exists in the prior art, the utility model provides a kind of miniature accent crack nut simple in structure.The gap that this transfers more automatic compensation screw mandrel of crack nut and nut is specially adapted to the control system of precise motion.

For achieving the above object, technical solutions of the utility model are:

Miniature accent crack nut, it comprises that mainly one is bolted in the nut main body on the screw mandrel, described nut main body is socketed to form by the main half-nut of a band inner cylindrical surface and the secondary half-nut gap of a band external cylindrical surface; One torsion spring is arranged between main half-nut and the secondary half-nut.

The usefulness of technique scheme is:

The utility model has been abandoned the nut structure that can't regulate the gap in the prior art automatically.It is designed to the main half-nut and the secondary half-nut of gap socket with nut main body, and is middle with fixedly connected two half-nuts of torsion spring.When screw pair the gap occurred because of wearing and tearing, the secondary half-nut that torsion spring will turn the band external cylindrical surface turned an angle to the left or to the right and eliminates the gap automatically.Even it keeps hour also making screw mandrel in use keep rigidity at system torque, be specially adapted to the control system of precise motion.

Description of drawings

Fig. 1 is the three-dimensional decomposition texture schematic representation of the utility model;

Fig. 2 is the utility model assembled state sectional structure schematic representation;

Fig. 3 is the prior art structural representation.

Embodiment

The utility model now is described in conjunction with the accompanying drawings and embodiments.

Miniature accent crack nut as shown in Figure 1, 2, it comprises that mainly one is bolted in the nut main body 2 on the screw mandrel 1, described nut main body 2 is socketed to form by the main half-nut 22 of a band inner cylindrical surface 221 and secondary half-nut 21 gaps of a band external cylindrical surface 211.One torsion spring 3 is arranged between main half-nut 22 and the secondary half-nut 21.When screw pair the gap occurred because of wearing and tearing, the secondary half-nut 21 that torsion spring 3 will turn band external cylindrical surface 211 turned an angle to the left or to the right and eliminates the gap automatically.Secondary half-nut external cylindrical surface is provided with more than one torsion spring draw-in groove 212, torsion spring 3 is stuck in pays in the different torsion spring draw-in groove 212 of nut circumference, adjusts spring torsion, adjustable systems moment of torsion and rigidity.

Claims

1. miniature accent crack nut is characterised in that: it comprises that mainly one is bolted in the nut main body on the screw mandrel, and described nut main body is socketed to form by the inner cylindrical surface master half-nut of a band and the secondary half-nut gap of a band external cylindrical surface; One torsion spring is arranged between main half-nut and the secondary half-nut.

2. miniature accent as claimed in claim 1 crack nut, be characterised in that: secondary half-nut external cylindrical surface is provided with more than one torsion spring draw-in groove.