CN200956108Y

CN200956108Y - Electric push rod

Info

Publication number: CN200956108Y
Application number: CN 200620107304
Authority: CN
Inventors: 马巧芬; 马耀辉
Original assignee: 许晓华
Priority date: 2006-08-31
Filing date: 2006-08-31
Publication date: 2007-10-03
Anticipated expiration: 2016-08-31

Abstract

The utility model discloses an electric pusher, which comprises a pusher body and a motor connected with the pusher body. The pusher body comprises an outer cylinder, a guide sleeve, a lead screw and a pusher. The lead screw is connected with the motor. A pusher stroke measuring device is provided on the outer cylinder; the pusher stroke measuring device comprises a variable resistor and a gear reduction mechanism arranged on the pusher body. A gear which can adjust ohmic value of the variable resistor in an interlinked way is provided on the variable resistor. The gear is connected with the lead screw on the pusher body through the gear reduction mechanism. The displacement of the pusher is controlled directly through setting ohmic value; the ohmic value of the variable resistor is changed under the drive of the pusher; when the ohmic value reaches the set value, electric signals are sent out and fed back to a control part of the pusher; after analyzing the signals, the control part controls the motor. As a result, the electric pusher can be adjusted more precisely; and the pusher will not extend too much or inadequately.

Description

A kind of electric pushrod

Technical field

The utility model relates to a kind of electric pushrod.

Background technology

Electric pushrod is widely used, as in automotive seat position and sick bed, all being widely used, for making seat or sick bed reach the needed position of people, need to regulate the push rod elongation of electric pushrod, the conduction time of motor is controlled in the elongation control of existing electric pushrod usually by the time relay, thereby control corresponding push rod elongation, because the stability of electric current can not be guaranteed under the operating mode situation, thereby it is not enough or too much to occur the push rod elongation often.

Summary of the invention

The purpose of this utility model is to provide a kind of electric pushrod, and it can accurately control the push rod displacement, and simple in structure, compact.

For achieving the above object, a kind of electric pushrod that the utility model provides comprises push rod body and the motor that is attached thereto, described push rod body comprises urceolus, the guide pin bushing that matches mutually with urceolus, screw mandrel and push rod in the urceolus, described screw mandrel links to each other with motor, also be provided with push rod stroke locating device on the described urceolus, described push rod stroke locating device comprises variohm and the gear reduction that is located on the push rod body, but described variohm is provided with the gear that interlock is regulated the variohm resistance value, and the gear on the described variohm is connected with screw mandrel on the push rod body by gear reduction.

The utility model is owing to adopt technique scheme, make at electric pushrod it is not to control the corresponding displacement of push rod by the time of electrical power in the push rod adjustment process, but control by setting resistance value, motion by push rod drives variohm change resistance value, when resistance value reaches setting value, send the control section that electric signal feeds back to electric pushrod, control section is controlled motor after to signal analysis, therefore the automatic adjusting of electric pushrod is more accurate, the not enough or too much phenomenon of push rod elongation can not occur.

Description of drawings

Fig. 1 is the utility model one-piece construction synoptic diagram;

Fig. 2 is a right view of the present utility model.

Embodiment

As Fig. 1, shown in Figure 2, the motor 6 that a kind of electric pushrod that the utility model provides comprises the push rod body and is attached thereto, the push rod body comprises urceolus 1, the guide pin bushing 3 that matches mutually with urceolus 1, screw mandrel 2 and push rod 11 in the urceolus 1, the engagement of the internal whorl of screw mandrel 2 external screw-threads and urceolus 1, make urceolus 1 can when screw mandrel 2 rotates, produce corresponding displacement, screw mandrel 2 and urceolus 1 combination back are inserted in the urceolus 1, again guide pin bushing 3 is connected with urceolus 1, guide pin bushing 3 is passed in the bottom of screw mandrel 2, screw mandrel 2 links to each other with motor 6 and can run-in synchronism, push rod stroke locating device also is housed on the urceolus 1, push rod stroke locating device comprises variohm 5 and the gear reduction 7 that is located on the push rod body, but variohm 5 is provided with the gear 4 that interlock is regulated variohm 5 resistance values, gear 4 on the described variohm 5 is connected with screw mandrel 2 on the push rod body by gear reduction 7 and can run-in synchronism, and the gear 4 that is fixed on the variohm when screw mandrel 2 rotates also rotates.

During work, set the push rod displacement, be resistance value, the operation motor is delivered to power on the screw mandrel 2 by gear train, screw mandrel 2 rotates and makes push rod 11 produce displacement, the gear 4 that is connected on the variohm when screw mandrel 2 rotates simultaneously also rotates, and the rotation of gear 4 makes the resistance of variohm change, when resistance value arrives setting value, obtain the push rod displacement that desire is established, this moment, motor was out of service.

Claims

1, a kind of electric pushrod, the motor that comprises the push rod body and be attached thereto (6), described push rod body comprises urceolus (1), the guide pin bushing (3) that matches mutually with urceolus (1), screw mandrel (2) and push rod (11) in the urceolus (1), described screw mandrel (11) links to each other with motor (6), it is characterized in that: also be provided with push rod stroke determinator on the described urceolus (1), described push rod stroke determinator comprises variohm (5) and the gear reduction (7) that is located on the push rod body, described variohm (5) but be provided with the gear (4) that interlock is regulated the variohm resistance value, the gear (4) on the described variohm (5) is connected with screw mandrel (2) on the push rod body by gear reduction (7).