CN208112416U

CN208112416U - Electric pushrod assembly

Info

Publication number: CN208112416U
Application number: CN201820130675.1U
Authority: CN
Inventors: 袁玉平
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2018-11-16
Anticipated expiration: 2027-06-12
Also published as: CN207234598U; CN208112415U; CN208209715U

Abstract

The utility model discloses a kind of electric pushrod assembly, including cylinder barrel, main nut, hollow push rod and screw rod, cylinder barrel is fixed on rack by ring flange, main nut and hollow push rod are linked to be one whole and closedly loaded in cylinder barrel, screw rod is loaded on the inner cavity of main nut and hollow push rod, and screw rod and main nut are to be threadedly engaged；Wherein, retaining ring for shaft shoulder is installed between the thrust bearing cap and self-aligning roller bearing on push rod assembly top, felt collar is set between screw rod and thrust bearing cap, and circlip for shaft, the upper end joint gap setting circlip for hole of main nut and nut seat is arranged in the shaft shoulder portion of screw rod；O-ring is set between the cylinder barrel of push rod assembly lower part and preceding guide sleeve, and preceding guide sleeve and hollow push rod are provided with sealing ring, are oriented between gland and hollow push rod and flower bud shape sealing ring and dust-proof seal ring is arranged.The utility model improves in terms of antifouling anti-corrosion or running stability.

Description

Electric pushrod assembly

The application be " 2017-06-12 " applying date, application No. is " 2017206804053 ", entitled " a kind of electronic The divisional application of the Chinese utility model patent of push rod ", entire contents are incorporated among the application.

Technical field

The utility model relates to straight line executing mechanism more particularly to a kind of electric pushrod assemblies.

Background technique

Electric pushrod is that a kind of straight reciprocating motion that the rotary motion of motor is changed into push rod is driven by electricity dress It sets.Common electric pushrod is Worm Wheel System form：Worm screw on motor gear drives worm gear rotation, makes small in worm gear Screw rod moves axially, and drives gag lever post accordingly to move axially by connecting plate, until when required stroke, by adjusting limited block pressure Lower stroke switch power-off, motor shut 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 setting exists not Foot, so that component operation is not stable enough；Etc..In view of this, it is necessary to which existing electric pushrod is improved.

Utility model content

For the existing defect of the prior art, the purpose of this utility model is to provide a kind of electric pushrod assemblies, use To be improved in terms of antifouling anti-corrosion or running stability.

In order to solve the above technical problems, the utility model provides a kind of electric pushrod assembly, electric pushrod assembly and deceleration Machine is sequentially connected by screw thread pair, and speed reducer is the worm-gear speed reducer or bevel gear reducer of hollow shaft, and the speed reducer is logical It crosses shaft coupling to be connected to motor, for the external two-direction switch of motor to control positive and negative rotation, electric pushrod assembly includes cylinder barrel, main spiral shell Female, hollow push rod and screw rod, cylinder barrel are fixed on rack by ring flange, main nut and hollow push rod be linked to be one it is whole and closed It is loaded in cylinder barrel, screw rod is loaded on the inner cavity of main nut and hollow push rod, and screw rod and main nut are to be threadedly engaged likes；Wherein, Retaining ring for shaft shoulder is installed between the thrust bearing cap and self-aligning roller bearing on push rod assembly top, is set between screw rod and thrust bearing cap Felt collar is set, circlip for shaft, the upper end joint gap providing holes elasticity of main nut and nut seat is arranged in the shaft shoulder portion of screw rod Retaining ring；O-ring is set between the cylinder barrel of push rod assembly lower part and preceding guide sleeve, and preceding guide sleeve and hollow push rod are provided with sealing Circle is oriented between gland and hollow push rod and flower bud shape sealing ring and dust-proof seal ring is arranged.

Compared with prior art, the electric pushrod of the utility model is converted rotary motion to directly by screw-driven pair Line movement is reasonably provided with guiding mechanism by the opening and closing of push rod driving workpiece, has stable working, transmission efficiency height, longevity Order long feature；The main component of the equipment uses closed type structure, thus anti-corrosion and antifouling capacity are strong, high lubricating effect.

Detailed description of the invention

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.

Specific embodiment

The utility model for ease of understanding is described in detail below in conjunction with attached drawing and specific embodiment.

Referring also to FIG. 1 to FIG. 2, wherein：Fig. 1 is the structure chart (saving motor and speed 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 speed reducer (not shown go out) Transmission connection, speed reducer are connect by shaft coupling (not shown go out) and motor (not shown go out), and motor is monophase machine or three-phase Motor, driving electric pushrod drives workpiece past when forward and reverse rotation (controlling positive and negative rotation especially by external two-direction switch) Multiple movement, it is further explained below.

Design is optimized to electric pushrod in the utility model, is full-enclosed structure；Speed reducer is hollow shaft Worm-gear speed reducer or bevel gear reducer, it and electric pushrod are screw thread pair transmission connection；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 rod 117 etc. Component is constituted, and wherein main nut 114 and hollow push rod 116 are linked to be one and are loaded in cylinder barrel 126 whole and closedly, screw rod 117 be loaded on main nut 114 and hollow push rod 116 inner cavities, and screw rod 117 with main nut 114 to be threadedly engaged, screw rod 117 and The output shaft of speed reducer is sequentially connected, when screw rod 117 rotates under speed reducer drive, main nut 114 and hollow push rod 116 1 Play the straight reciprocating motion in cylinder barrel 126.Wherein, screw rod 117 and main nut 114 form screw-driven pair, according to hoisting capacity It is different with opening and closing speed, three kinds of trapezoidal screw, ball screw, planetary roller screw rod 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 go out) by ring flange, and rack is in the top of cylinder barrel Setting thrust shaft block 103 carrys out installed thrust self-aligning roller bearing 107, installs thrust bearing cap 140 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 preferably to self-aligning roller bearing 107 Carry out axial limiting；The upper end of screw rod 117 is supported in self-aligning thrust roller bearing 107；Screw rod 117 is in thrust force aligning Roller Shaft The top installation load-bearing nut 102 of 107 support portions is held, which lock onto the upper of screw rod 117 by locking nut 134 The apical support device of electric pushrod is consequently formed so that screw rod 117 hangs on cylinder barrel 126 in end.

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

As shown in FIG. 1 to 3, guide collar 118 before screw rod is arranged in the lower end of screw rod 117, and guide collar 118 is arranged before screw rod Sliding sleeve 127 is contacted with the inner wall of hollow push rod 116；Guide sleeve 122 before 126 lower end inner wall of cylinder barrel is arranged, preceding guide sleeve 122 are used Guiding gland 131 is positioned at cylinder barrel 126, and the lower end setting guidance tape 128 of hollow push rod 116 cooperates with preceding guide sleeve 122； The guiding device for forming electric pushrod in this way thereby guarantees that hollow push rod 116 is reciprocally steady, finally may make hollow push away Bar 116 smoothly pushes workpiece motion s.

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

In above embodiments, the end of hollow push rod 116 is equipped with external screw thread, screw in nut seat 112 and with screw 115 come It is fixed, thread looseness can be prevented, the outer surface of the hollow push rod 116 can be used 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 made on this basis to it are also considered as Fall into the protection scope of the utility model claims restriction.

Claims

1. a kind of electric pushrod assembly, including cylinder barrel, main nut, hollow push rod and screw rod, the end of hollow push rod is with external screw thread Screw in the nut seat of main nut and be screwed into after an entirety closedly loaded in cylinder barrel, screw rod loaded on main nut and The inner cavity of hollow push rod, and screw rod and main nut, to be threadedly engaged, the output shaft of screw rod and speed reducer is sequentially connected；Electric pushrod Upper and lower end sealing device is respectively set, which is characterized in that guide collar before the lower end of screw rod setting screw rod, screw rod It is leading to set sliding sleeve to snare and contacted with the inner wall of hollow push rod；Guide sleeve before cylinder barrel lower end inner wall is arranged, it is leading to lead to applying It is positioned at cylinder barrel to gland, the lower end setting guidance tape of hollow push rod cooperates with preceding guide sleeve, to form electric pushrod Guiding device guarantees that hollow push rod is reciprocally steady, so that hollow push rod smoothly pushes workpiece motion s.