CN2733721Y

CN2733721Y - Linear actuator

Info

Publication number: CN2733721Y
Application number: CN 200420089245
Authority: CN
Inventors: 李烨翰
Original assignee: Jieshida Enterprise Co ltd
Current assignee: J-STAR CO., LTD.
Priority date: 2004-09-17
Filing date: 2004-09-17
Publication date: 2005-10-12
Anticipated expiration: 2014-09-17

Abstract

The utility model relates to a linear actuator, comprising a motor with an output shaft which is a worm rod, a bit shift component with a worm gear, a shaft and a feeding member arranged on the shaft, and a motion control component. The worm gear drives the shaft to rotate, and the output shaft of the motor drives the worm gear to rotate, thus making the feeding member make the linear bit shift in the shaft direction of the shaft. The motion control component comprises a driving member, a gear group and a detecting device, and the driving member is arranged on the shaft of the bit shift component to drive the driving member to rotate when the shaft rotates, thus driving the gear group to drive the detecting device to rotate and control the bit shift of the feed member.

Description

Linear actuators

Technical field

The utility model is relevant with actuator, particularly about a kind of structure of linear actuators.

Background technology

The general linear actuator includes a motor, a displacement component, and the one stroke control assembly.Displacement component has a rotating shaft and a feeding part, and the Stroke Control assembly has advises gear train for the moment, and an arrangement for detecting; The output shaft of motor drives a driving gear set and timing gear group, make the rotating shaft rotation of driving gear set drive displacement assembly, can allow of the axially linearly displacement of feeding part along rotating shaft, the timing gear group then is used to drive arrangement for detecting, make the rotation of arrangement for detecting control motor output shaft, and then the shift length of restriction feeding part, surpass movable distance when preventing that the feeding part from moving.Usually linear actuators can be installed in a treadmill inside, utilizes the feeding part can controlled and linearly moving characteristic, changes the angle of inclination of the running platform of treadmill.

Yet, in the structure of above-mentioned linear actuators, must in time advise the driving of gear train by driving gear set, could reach simultaneously and move forward into,, make that linear activated overall structure is comparatively complicated with the function that drives arrangement for detecting to part, volume is comparatively huge, can't be installed in small-sized treadmill.

Summary of the invention

At the problems referred to above, main purpose of the present utility model is to provide a kind of linear actuators, and it is comparatively simple that it forms member, and overall volume is less.

For achieving the above object, linear actuators provided by the utility model includes a motor, has an output shaft, and output shaft is a worm screw; One displacement component has the feeding part that a worm gear, a rotating shaft and are located at rotating shaft, worm gear drives rotating shaft rotation, and the output shaft of motor then drives the worm gear rotation, makes the axial straight-line displacement of feeding part along rotating shaft; The one stroke control assembly has a driving member, a gear train and an arrangement for detecting, and driving member is located at the rotating shaft of displacement component, drives the driving member rotation when making the rotating shaft rotation, and then turns the gear set drive arrangement for detecting, the displacement of control feeding part.

Adopt technique scheme, make the utility model can comparatively simply form member, realize the function of linear actuators, reach the purpose of dwindling overall volume.

Description of drawings

Fig. 1 is the three-dimensional combination figure of the utility model one preferred embodiment;

Fig. 2 is the partial sectional perspective view of the utility model one preferred embodiment;

Fig. 3 is the part cutaway view of the utility model one preferred embodiment, the structure of display line process control assembly;

Fig. 4 is the front view of partial component in the utility model one preferred embodiment, shows the structure of displacement component and Stroke Control assembly;

Fig. 5 is the three-dimensional exploded view of partial component in the utility model one preferred embodiment.

Embodiment

Lift a preferred embodiment and conjunction with figs. below, structure of the present utility model and effect are elaborated.

As Fig. 1～shown in Figure 5, linear actuators provided by the utility model includes a motor 10, a displacement component 20, and one stroke control assembly 30, wherein:

As shown in Figure 2, motor 10 has an output shaft 12, and a pedestal 14 that is located on output shaft 12 outsides, and in the present embodiment, output shaft 12 is a worm screw.

Displacement component 20 has a worm gear 25, a rotating shaft 21 and a feeding part 22, and as shown in Figure 5, worm gear 25 2 sides are a sheathed bearing 27 respectively, and rotating shaft 21 is a screw rod, and an end has four and is the protuberance 24 that isogonism is arranged.Rotating shaft 21 is arranged in each bearing 27 and worm gear 25, can drive the original place rotation by worm gear 25.22 of feeding parts and are engaged in the other end periphery of rotating shaft 21 in a tubular form.As shown in Figure 2, displacement component 20 is embedded in the pedestal 14 of motor 10 with two bearings 27, and worm gear 25 can be rotated in the original place in pedestal 14, and the output shaft 12 of motor 10 then is meshing with each other with worm gear 25.When output shaft 12 is driven and when rotating, it can drive worm gear 25 and rotate, and then turn rotating shaft 21, make the axial straight-line displacement of feeding part 22 along rotating shaft 21.

Stroke Control assembly 30 has a driving member 31, a gear train 32, and an arrangement for detecting 33.As shown in Figure 3, driving member 31 has a disk 34, one side of disk 34 has a gear part 35, the another side has four and is the recess 36 (as shown in Figure 5) that isogonism is arranged, gear part 35 is engaged in gear train 32, and gear train 32 drives a retainer component 37 again, makes retainer component 37 arrangement for detecting 33 of can conflicting.As shown in Figure 2, Stroke Control assembly 30 is located in the pedestal 14 of motor 10, and the recess 36 coaxial protuberances 24 that are embedded in rotating shaft 21 with driving member 31, make rotating shaft 21 drive driving member 31 rotations, and then turn gear train 32, and retainer component 37 can drive arrangement for detecting 33, the rotation of the output shaft 12 of control motor 10.

Via said structure, when utilizing worm gear 25, the output shaft 12 of motor 10 drives rotating shafts 21 rotations, the feeding part 22 that makes rotating shaft 21 1 ends is during along straight-line displacement, rotating shaft 21 other ends drive driving member 31 rotations of Stroke Control assembly 30 simultaneously, turn retainer component 37 by the gear train 32 that is meshed again, when making retainer component 37 rotate to a predetermined angular, can drive arrangement for detecting 33, the output shaft 12 of motor 10 is stopped the rotation, and rotating shaft 21 just can't drive feeding part 22 again and moves, and reaches the function of restriction feeding part 22 displacements.

Thus, the utility model promptly can comparatively simply be formed member, reaches the less purpose of overall volume.

In addition, the recess of above-mentioned driving member is incorporated into the compound mode of the protuberance of rotating shaft, and also the structure of available other form replaces, for example driving member has protuberance, rotating shaft has recess, or driving member has a bayonet unit, can be fixed in the rotating shaft driving member is coaxial.

Claims

1, a kind of linear actuators is characterized in that including:

One motor has an output shaft, and described output shaft is a worm screw;

One displacement component has the feeding part that a worm gear, a rotating shaft and are located at described rotating shaft, the described rotating shaft rotation of described worm gear drives, and the output shaft of described motor then drives described worm gear rotation, makes the axial straight-line displacement of described feeding part along described rotating shaft;

The one stroke control assembly, have a driving member, a gear train and an arrangement for detecting, described driving member is located at the rotating shaft of described displacement component, drives described driving member rotation when described rotating shaft is rotated, and then turn the described arrangement for detecting of described gear set drive, control the displacement of described feeding part.

2, linear actuators as claimed in claim 1 is characterized in that: described motor has a pedestal, and two sides of described worm gear are respectively equipped with a bearing, and each described bearing is arranged at described pedestal, makes described worm gear under the drive of described output shaft and original place rotation.

3, linear actuators as claimed in claim 1 is characterized in that: described rotating shaft one end has a protuberance, and described driving member has a recess, and described recess and described protuberance are chimeric mutually.

4, linear actuators as claimed in claim 1 is characterized in that: described rotating shaft one end has a recess, and described driving member has a protuberance, and described recess is embedded in described protuberance.

5, linear actuators as claimed in claim 1 is characterized in that: described driving member has a bayonet unit, is fixed in described rotating shaft with described driving member is coaxial.