CN212660064U

CN212660064U - Electric cylinder structure

Info

Publication number: CN212660064U
Application number: CN202021825448.4U
Authority: CN
Inventors: 徐航
Original assignee: Suzhou Selward Internet Of Things Technology Co Ltd
Current assignee: Suzhou Selward Internet Of Things Technology Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-03-05
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses an electric cylinder structure, including integrated motor stator on electric cylinder shell, motor stator's both ends installation tailstock and end cover, electric motor rotor passes through electric motor rotor shaft and installs in motor stator, electric motor rotor shaft cavity, one end sets up the flange, flange joint ball nut, ball installs in hollow electric motor rotor shaft, through commutator and the cooperation of screw nut, reciprocating motion under screw nut and electric motor rotor's drive, electric motor rotor shaft lies in the through-hole that tailstock side set up and outside intercommunication, avoid air compression to obstruct ball indentation. The utility model discloses under the equal stroke that is not more than motor length, the total length of electric jar saves about the third than the direct-connected type, and the width saves about the half than the parallel and can satisfy the structural need in little space, also can bear great axial force simultaneously.

Description

Electric cylinder structure

Technical Field

The utility model relates to an electric jar structure belongs to electric jar technical field.

Background

The electric cylinder is a modularized product which integrates a servo motor and a lead screw, converts the rotary motion of the servo motor into linear motion, and simultaneously converts the best advantages of the servo motor, namely accurate rotating speed control, accurate revolution control and accurate torque control into accurate speed control, accurate position control and accurate thrust control; and a high-precision linear motion product is realized.

The existing electric cylinders are mainly divided into two types, namely a direct connection type and a parallel connection type, wherein a motor shaft is directly connected with a push rod through a coupler in a direct connection mode, and the size of the motor shaft in the length direction is large; the parallel electric cylinder is used for controlling the motor to be connected with the bearing unit through the synchronous belt and the pulley block, and the size in the width direction is large. On some equipment, for the occasions with high space size requirements, the sizes of the two electric cylinders are difficult to meet the requirements, and an electric cylinder structure capable of meeting the small space is needed. In order to solve this problem, utility model people have proposed an electric cylinder structure, but still can not adapt to all situations.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides an electric cylinder structure which can satisfy a small space.

In order to realize the technical purpose, the utility model discloses a technical scheme is: the utility model provides an electric cylinder structure, including integrated motor stator on electric cylinder shell, tailstock and end cover are installed at motor stator's both ends, electric motor rotor passes through electric motor rotor shaft and installs in motor stator, electric motor rotor shaft cavity, one end sets up the flange, flange joint ball nut, ball installs in hollow electric motor rotor shaft, through commutator and the cooperation of screw nut, reciprocating motion under screw nut and electric motor rotor's drive, electric motor rotor shaft lies in the through-hole of tailstock side setting and outside intercommunication, avoid air compression to obstruct ball indentation.

Furthermore, an end part angular contact bearing is arranged in the end cover, a tail end angular contact bearing is arranged in the tailstock, one end of the motor rotor shaft penetrates through the tail end angular contact bearing and is locked through double nuts, and a flange at the other end of the motor rotor shaft is pressed on the end part angular contact bearing through a front end sealing ring.

Further, the tailstock is connected with the motor mounting seat, an air vent is formed in the middle of the motor mounting seat, the motor rotor shaft is connected with the motor mounting seat through a tail end sealing ring, and the through hole of the motor rotor shaft is communicated with the outside through the air vent of the motor mounting seat.

Furthermore, a coded disc support is arranged on the outer end face of the tailstock, a reading head is installed on the coded disc support, an optical coded disc pressed by an elastic pressing sheet is arranged on the motor rotor shaft, and the optical coded disc rotates in the reading head along with a part of the rotation of the motor rotor shaft.

Furthermore, one end of the ball screw is provided with an organ cover and is connected with a screw lifting lug through a flange plate.

Compared with the prior art, the beneficial effects of the utility model are that: under the equal stroke that is not more than motor length, the total length of electric jar saves about one third than the direct-connected type, and the width saves about one half than the parallel, can satisfy the structural need in little space, and job stabilization nature is high, and can bear great axial force.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is a sectional view of the structure of the present invention;

FIG. 2 is a cross-sectional view taken along line B-B of the present invention;

fig. 3 is a partial enlarged view of fig. 2 of the present invention.

In the figure, 1, a motor mounting seat, 2, a tail end sealing ring, 3, a code disc bracket, 4, double nuts, 5, a tailstock, 6, a motor stator, 7, a ball screw, 8, a motor rotor, 9, an end cover, 10, an end part angular contact bearing, 11, a front end sealing ring, 12, a motor rotor shaft, 13, a screw nut, 14, a commutator, 15, an organ cover, 16, a flange plate, 17, a screw lifting lug, 18, an elastic pressing sheet, 19, an optical code disc, 20, a reading head, 21 and a tail end angular contact bearing are arranged.

Detailed Description

As shown in fig. 1, 2, 3, an electric cylinder structure, including motor stator 6 integrated on the electric cylinder casing, tailstock 5 and end cover 9 are installed at motor stator 6's both ends, motor rotor 8 installs in motor stator 6 through motor rotor shaft 12, motor rotor shaft 12 is hollow, one end sets up the flange, flange joint ball nut 13, ball 7 installs in hollow motor rotor shaft 12, cooperate with screw nut 13 through commutator 14, reciprocating motion under screw nut 13 and motor rotor 8's drive, motor rotor shaft 12 is located tailstock 5 side and sets up the through-hole with the outside intercommunication, avoid air compression to hinder ball 7 indentation.

Through many times of experiments, the utility model discloses the people discovery, design flange output can lug connection screw nut, does not need parts such as shaft coupling, and the axle can not form closed compression space for the through-hole design and obstruct the lead screw entering.

An end part angular contact bearing 10 is arranged in the end cover 9, a tail end angular contact bearing 21 is arranged in the tail seat 5, one end of a motor rotor shaft 12 penetrates through the tail end angular contact bearing 21 and is locked through a double nut 4, and a flange at the other end is connected to the end part angular contact bearing 10 in a pressing mode through a front end sealing ring 11.

The angular contact bearings can bear axial force, and after a shaft passes through the two bearings, the shaft is locked by double nuts to prevent the shaft from moving and falling out.

The tailstock 5 is connected with the motor mounting seat 1, an air vent is formed in the middle of the motor mounting seat 1, the motor rotor shaft 12 is connected with the motor mounting seat 1 through the tail end sealing ring 2, and the through hole of the motor rotor shaft 12 is communicated with the outside through the air vent of the motor mounting seat. The design of this structure neither can increase the size, also can not influence and bear, can prevent that the epaxial confined space that forms when the lead screw gets into forms compressed air and cause the hindrance.

The outer end face of the tail seat 5 is provided with a coded disc bracket 3, a reading head 20 is arranged on the coded disc bracket 3, an optical coded disc 19 pressed by an elastic pressing sheet 18 is arranged on the motor rotor shaft 12, and the optical coded disc 19 rotates in the reading head 20 along with a part of the rotation of the motor rotor shaft 12. This structure is used for detecting the rotation data of the motor shaft.

An organ cover 15 is arranged at one end of the ball screw 7, and is connected with a screw lifting lug 17 through a flange plate 16.

Organ cover dustproof and waterproof, the lug prevents that the lead screw from rotating, and only the lead screw does not change, the nut is driven the rotation by the rotor and just can let the lead screw realize reciprocating motion.

The utility model discloses an embodiment, only be right the utility model discloses a structure and the explanation of creative thinking are not regarded as the restriction to this technical scheme the utility model discloses the replacement is equalled on the basis, belongs to the utility model discloses a protection scope.

Claims

1. An electric cylinder structure, characterized in that: including the motor stator of integration on electric cylinder shell, motor stator's both ends installation tailstock and end cover, electric motor rotor passes through electric motor rotor shaft and installs in motor stator, electric motor rotor shaft cavity, one end sets up the flange, flange joint ball nut, ball installs in hollow electric motor rotor shaft, through commutator and the cooperation of screw nut, reciprocating motion under screw nut and electric motor rotor's drive, electric motor rotor shaft is located the through-hole of tailstock side setting and outside intercommunication, avoid air compression to obstruct ball indentation.

2. The electric cylinder structure according to claim 1, characterized in that: an end part angular contact bearing is arranged in the end cover, a tail end angular contact bearing is arranged in the tailstock, one end of a motor rotor shaft penetrates through the tail end angular contact bearing and is locked through double nuts, and a flange at the other end of the motor rotor shaft is pressed on the end part angular contact bearing through a front end sealing ring.

3. The electric cylinder structure according to claim 1, characterized in that: the tailstock is connected with the motor mounting seat, an air vent is formed in the middle of the motor mounting seat, the motor rotor shaft is connected with the motor mounting seat through a tail end sealing ring, and the through hole of the motor rotor shaft is communicated with the outside through the air vent of the motor mounting seat.

4. The electric cylinder structure according to claim 1, characterized in that: the outer end face of the tailstock is provided with a coded disc support, a reading head is installed on the coded disc support, an optical coded disc pressed by an elastic pressing sheet is arranged on a motor rotor shaft, and the optical coded disc rotates in the reading head along with a part of the rotation of the motor rotor shaft.

5. The electric cylinder structure according to claim 1, characterized in that: and one end of the ball screw is provided with an organ cover and is connected with a screw lifting lug through a flange plate.