CN202215708U

CN202215708U - Nut loop bar device of linear actuator

Info

Publication number: CN202215708U
Application number: CN201120339589XU
Authority: CN
Inventors: 李思益
Original assignee: Jiaxing University
Current assignee: Jiaxing University
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2012-05-09
Anticipated expiration: 2021-08-31

Abstract

A nut loop bar device of a linear actuator comprises a lug ring and a loop bar which are connected together by a screw, wherein the loop bar is divided into two sections: a loop bar body and a nut body, the loop bar body is a hollow cylinder, and the nut body is an octa-prismoid, a cylindrical counter bore is carved on each of two parallel planes of the octa-psimoid, and internal threads are carved on an inner hole of the nut body. When the nut loop bar device is installed in the linear actuator, roll posts are embedded in the cylindrical counter bores of the nut body and are further embedded in a linear groove on an inner cavity of an enclosure of the linear actuator, and the internal threads of the nut body and external threads of a screw of the linear actuator form a spiral motion pair, so that when the screw of the linear actuator rotates, the linear groove on the inner cavity of the enclosure of the linear actuator plays a limitation role on the motion of the roll posts, so that the nut loop bar can do directional and linear motion along the direction of the linear groove on the inner cavity of the enclosure of the linear actuator, therefore, the rotating motion of the screw can be converted into the linear motion of the nut loop bar to be output.

Description

The nut sleeve lever arrangement of linear actuator

Technical field

The utility model relates to a kind of mechanical device, particularly relates to a kind of nut sleeve lever arrangement of linear actuator.

Background technique

Linear actuator is the straight-line mechanical device that the rotation motion of input link is changed to output link, and it is for example having use widely in the products such as lathe, automotive seat, sick bed, top-grade furniture.

In the linear actuator that has the deceleration device, generally be rotation motion to be changed to straight-line through the screw mechanism of forming by nut and screw rod.For common nut, because structurally there is deficiency in it, generally can not satisfy the motion requirement of linear actuator, and the directionality in the transmission process, stability etc. are all relatively poor.

Summary of the invention

The purpose of the utility model is the deficiency that exists to background technique, and a kind of nut sleeve lever arrangement of linear actuator is provided.

For achieving the above object, the technological scheme that the utility model adopts is: a kind of nut sleeve lever arrangement comprises earrings and loop bar; Be characterized in that earrings and loop bar link together with screw, loop bar is divided into two sections of the cover body of rod and nut bodies; The cover body of rod is a hollow cylinder, and nut body is eight prisms, on two parallel planes of eight prisms; Be carved with two cylinder counterbores respectively; In the cylinder counterbore, can embed roller, be carved with internal thread on the endoporus of nut body, it is secondary that internal thread can form spiral motion with the screw rod outside thread of linear actuator.

Because the utility model has adopted earrings and has overlapped the nut loop bar structure that the body of rod and nut body are connected as a single entity; So; After being installed in it on linear actuator; When the screw rod of linear actuator rotates, but the drive nut loop bar is made directed straight line motion along the straight trough direction on the chassis cavity of linear actuator, thereby rotation motion is changed to straight line motion.

Description of drawings

Fig. 1 is the structure erection drawing of the utility model.

Fig. 2 is the left view of Fig. 1 of the utility model.

Fig. 3 is the casing of the utility model and linear actuator, the assembling relationship figure of screw rod.

Embodiment

Below in conjunction with accompanying drawing the structure and the working principle of the utility model are done further explain.

Referring to Fig. 1, Fig. 2 and Fig. 3, earrings 1 of the present invention connects as one with loop bar 3 usefulness screws 2.Loop bar is divided into the cover body of rod 301 and 302 two sections of nut bodies, and the cover body of rod is a hollow cylinder, and nut body is eight prisms, on two parallel planes of eight prisms, respectively is carved with a cylinder counterbore, on the endoporus of nut body, is carved with internal thread.

Referring to Fig. 3, in the cylinder counterbore of nut body, can embed roller 6, roller is embedded in the straight trough on casing 4 inner chambers of linear actuator again, and it is secondary that the outside thread of the internal thread of nut body and the screw rod of linear actuator 5 forms spiral motion.Like this; When the screw rod of linear actuator rotates; Because the straight trough on the chassis cavity of linear actuator is to the restriction of roller motion; Can make the nut loop bar make directed straight line motion, thereby the rotation motion of screw rod is changed to the straight line motion of nut sleeve bar and exports along the straight trough direction on the chassis cavity of linear actuator.

Should be noted that at last; Above embodiment is only unrestricted in order to technological scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement (for example can replace the described roller of the foregoing description with steel ball) the technological scheme of invention; And not breaking away from the spirit and the scope of technological scheme of the present invention, it all should be encompassed in the claim scope of the present invention.

Claims

1. the nut sleeve lever arrangement of linear actuator comprises earrings and loop bar, it is characterized in that: earrings (1) links together with screw (2) with loop bar (3).

2. the nut sleeve lever arrangement of linear actuator according to claim 1 is characterized in that: said loop bar (3) is divided into two sections of the cover body of rod and nut bodies.

3. the nut sleeve lever arrangement of linear actuator according to claim 1 and 2, it is characterized in that: the said cover body of rod is a hollow cylinder.

4. the nut sleeve lever arrangement of linear actuator according to claim 1 and 2; It is characterized in that: said nut body is eight prisms; On two parallel planes of eight prisms, respectively be carved with a cylinder counterbore, on the endoporus of nut body, be carved with internal thread.