CN207234598U

CN207234598U - A kind of electric pushrod

Info

Publication number: CN207234598U
Application number: CN201720680405.3U
Authority: CN
Inventors: 袁玉平
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2018-04-13
Anticipated expiration: 2027-06-12
Also published as: CN208112416U; CN208112415U; CN208209715U

Abstract

The utility model discloses a kind of electric pushrod, electric pushrod includes cylinder barrel, main nut, hollow push rod and screw, the end of hollow push rod is loaded in cylinder barrel with screwing into the nut seat of main nut and being screwed into an entirety, inner cavity of the screw loaded on main nut and hollow push rod, screw is with main nut with thread fitting, the output shaft of screw and gear reducer is sequentially connected, and the upper and lower end of electric pushrod sets sealing device respectively.The utility model is improved in terms of antifouling anti-corrosion or running stability.

Description

A kind of electric pushrod

Technical field

It the utility model is related to straight line executing mechanism, more particularly to a kind of electric pushrod.

Background technology

Electric pushrod is a kind of driven by power dress of straight reciprocating motion that the rotary motion of motor is changed into push rod Put.Common electric pushrod is Worm Wheel System form：Worm screw on motor gear drives worm gear to rotate, and makes small in worm gear Screw moves axially, by connecting plate drive gag lever post accordingly move axially, to required stroke when, by adjusting limited block pressure Lower stroke switch powers off, and motor shuts down (positive revertive control is identical).There are one when this electric pushrod is for opening and closing workpiece Determine problem, such as：Leakproofness Shortcomings, cause antifouling and anti-corrosion effect not ideal enough；For another example, guiding mechanism, which is set, exists not Foot so that component operation is not steady enough；Etc..In view of this, it is necessary to which existing electric pushrod is improved.

Utility model content

For the prior art there are the defects of, the purpose of this utility model is to provide a kind of electric pushrod, to It is improved in terms of antifouling anti-corrosion or running stability.

To solve above technical problem, the utility model provides a kind of electric pushrod, including cylinder barrel, main nut, hollow pushes away Bar and screw, the end of hollow push rod are closed after an entirety to screw into the nut seat of main nut and be screwed into Formula loaded in cylinder barrel, inner cavity of the screw loaded on main nut and hollow push rod, and screw and main nut be with thread fitting, screw with The output shaft of gear reducer is sequentially connected；The upper and lower end of electric pushrod sets sealing device respectively.

Compared with prior art, convert rotational motion is straight by screw-driven pair by the electric pushrod of the utility model Line moves, and by the keying of push rod driving workpiece, it is reasonably provided with guiding mechanism, has stable working, transmission efficiency, longevity Order the characteristics of long；The critical piece of the equipment uses closed type structure, thus anti-corrosion and antifouling capacity are strong, high lubricating effect.

Brief description of the drawings

Fig. 1 is the structure chart of the utility model electric pushrod；

Fig. 2 is the partial enlarged view of part A in Fig. 1；

Fig. 3 is the partial enlarged view of part B in Fig. 1.

Embodiment

For ease of understanding the utility model, it is described in detail below in conjunction with attached drawing and specific embodiment.

Referring also to Fig. 1~Fig. 2, wherein：Fig. 1 is the structure chart (saving motor and gear reducer) of electric pushrod；Fig. 2 is figure The partial enlarged view of part A in 1；Fig. 3 is the partial enlarged view of part B in Fig. 1.The electric pushrod and gear reducer (not shown) It is sequentially connected, gear reducer is connected by shaft coupling (not shown) with motor (not shown), and motor is monophase machine or three-phase Motor, its it is forward and reverse rotate (controlling positive and negative rotation especially by external two-direction switch) when drive electric pushrod drive workpiece it is past Multiple movement, it is further explained below.

Electric pushrod is optimized design in the utility model, it is full-enclosed structure；Gear reducer is hollow shaft Worm-gear speed reducer or bevel gear reducer, it is sequentially connected with electric pushrod for screw thread pair；Illustrate in further detail below.

As shown in FIG. 1 to 3, electric pushrod is main by cylinder barrel 126, main nut 114, hollow push rod 116 and screw 117 etc. Component is formed, and wherein main nut 114 and hollow push rod 116 are linked to be one and are loaded on overall and closedly in cylinder barrel 126, screw 117 inner cavities loaded on main nut 114 and hollow push rod 116, and screw 117 and main nut 114 be with thread fitting, screw 117 with The output shaft of gear reducer is sequentially connected, when screw 117 rotates under gear reducer drive, main nut 114 and hollow push rod 116 1 Play the straight reciprocating motion in cylinder barrel 126.Wherein, screw 117 and main nut 114 form screw-driven pair, it is according to hoisting capacity It is different with speed is opened and closed, three kinds of trapezoidal screw, ball screw, planetary roller screw patterns can be used, it is further explained below.

As shown in FIG. 1 to 3, cylinder barrel 126 is fixed on rack (not shown) by ring flange, and rack is in the top of cylinder barrel Set thrust shaft block 103 to carry out installed thrust self-aligning roller bearing 107, thrust bearing cap 140 be installed on thrust shaft block 103, And retaining ring for shaft shoulder 135 is installed between thrust bearing lid 140 and self-aligning roller bearing 107, so to self-aligning roller bearing 107 preferably Carry out axial limiting；The upper end of screw 117 is supported in self-aligning thrust roller bearing 107；Screw 117 is in thrust force aligning Roller Shaft The top installation load-bearing nut 102 of 107 supporting parts is held, which lock onto the upper of screw 117 by locking nut 134 End so that screw 117 hangs on cylinder barrel 126, is consequently formed the apical support device of electric pushrod.

As shown in FIG. 1 to 3, the upper end of screw 117 is connected to the transmission shaft of hollow shaft reducer, and screw 117 is logical Cross flat key 101 and the transmission shaft of gear reducer is positioned, such screw 117 can rotate in cylinder barrel 126；Main nut 114 passes through Flat key 113 is connected as a single entity with nut seat 112, nut seat 112 with and hollow push rod 116 be threadedly coupled and locked with lock-screw 115 Tightly so that main nut 114 becomes an entirety with hollow push rod 116, and hollow push rod 116 and main nut 114 are placed in cylinder barrel 126 Interior, screw 117 is placed in hollow push rod 116 and main nut 114, when screw 117 rotates, main nut 114 and hollow push rod 116 Straight reciprocating motion can be done between 126 inner wall of cylinder barrel；Thus, the movement of main nut 114 and hollow push rod can drive hollow The suspending head (not shown) of 116 lower end extension connection of push rod, may finally drive workpiece motion s.

As shown in FIG. 1 to 3, the bottom of screw 117 sets guide collar 118 before screw, and guide collar 118 is arranged before screw Sliding sleeve 127 is contacted with the inner wall of hollow push rod 116；Guide sleeve 122 before 126 bottom inner wall of cylinder barrel is set, preceding guide sleeve 122 are used It is oriented to gland 131 and is positioned at cylinder barrel 126, the bottom of hollow push rod 116 sets guidance tape 128 to coordinate with preceding guide sleeve 122； The guider of electric pushrod is so formed, thereby guarantees that hollow push rod 116 is reciprocally steady, finally may be such that hollow push away Bar 116 smoothly promotes workpiece motion s.

As shown in FIG. 1 to 3, felt collar 109, the shaft shoulder portion of screw 117 are set between screw 117 and thrust bearing cap 140 Circlip for shaft 110 is set, main nut 114 and the upper end joint gap of nut seat 112 set circlip for hole 111, this Sample causes the top of electric pushrod to have good leakproofness.O-ring 129 is set between cylinder barrel 126 and preceding guide sleeve 122, it is preceding Guide sleeve 122 is provided with sealing ring 123 with hollow push rod 116, is oriented between gland 131 and hollow push rod 116 and sets flower bud shape close Seal 122 and dust-proof seal ring 132；In addition the bottom for being oriented to gland 131 sets scraping dirt circle 133 to prevent sludge from entering；It is hollow Hexagonal plug cock 130 in being set on the bottom cover of push rod 116, it may be necessary to which hexagonal plug cock 130 replaces sump oil in opening；Pass through this A little measures form the sealer of electric pushrod, it also has good leakproofness.

In above example, the end of hollow push rod 116 is equipped with external screw thread, its screw in nut seat 112 and with screw 115 come It is fixed, can prevent thread looseness, the outer surface of the hollow push rod 116 can use the techniques such as plating, spray painting or spray industrial ceramics into Row preservative treatment.

The utility model is described in detail above, the improvements and modifications that it is made are also considered as on this basis Fall into the protection domain of the utility model claims restriction.

Claims

A kind of 1. electric pushrod, it is characterised in that including cylinder barrel, main nut, hollow push rod and screw, the end of hollow push rod with Screw into the nut seat of main nut and be screwed into after an entirety closedly loaded in cylinder barrel, screw is loaded on master The inner cavity of nut and hollow push rod, and screw and main nut are with thread fitting, the output shaft drive connection of screw and gear reducer；Electricity The upper and lower end of dynamic push rod sets sealing device respectively.
2. electric pushrod as claimed in claim 1, it is characterised in that be screw-driven pair, ball between screw and main nut Wire rod thread transmission or planetary roller wire rod thread transmission.
3. electric pushrod as claimed in claim 1, it is characterised in that hollow push rod lower end extension connects suspending head.
4. electric pushrod as claimed in claim 1, it is characterised in that hexagonal plug cock in being set on the bottom cover of hollow push rod.
5. electric pushrod as claimed in claim 1, it is characterised in that the outer surface of hollow push rod carries out preservative treatment.
6. electric pushrod as claimed in claim 1, it is characterised in that gear reducer is the worm-gear speed reducer or cone of hollow shaft Gear reduction unit.
7. electric pushrod as claimed in claim 6, it is characterised in that gear reducer is sequentially connected with electric pushrod for screw thread pair.
8. electric pushrod as claimed in claim 7, it is characterised in that gear reducer is connected by shaft coupling with motor.
9. such as claim 1~8 any one of them electric pushrod, it is characterised in that the external two-direction switch of motor is to control just Reverse turn.