阅读说明：本技术 带自动锁定的伸缩式致动器 (The telescopic actuator that band locks automatically ) 是由 G·莱考蒂尔 A·勒布雷顿 于 2019-05-16 设计创作，主要内容包括：本发明涉及一种伸缩式致动器,包括具有封闭端(2)和用于使空心杆(4)通过的开口端(3)的气缸(1),空心杆安装成在气缸中轴向滑动。致动器包括中心支撑件(10),中心支撑件从杆内部的气缸的封闭端延伸并且承载在缩进位置与突伸位置之间径向可移动的障碍物(15),缩进位置容许杆自由滑动,在突伸位置中,障碍物接合在杆中的凹槽(9)内,以便相对于气缸轴向地锁定杆,障碍物的侧腹和凹槽的侧腹成形为防止通过杆的运动而使障碍物缩进,障碍物布置在纵向延伸的弹簧刮板(14)的端部处并布置成将障碍物从缩进位置推向突伸位置,中心支撑件承载用于弯曲刮板以使障碍物朝向缩进位置缩进的受控装置(20)。(The present invention relates to a kind of telescopic actuator, the cylinder (1) including the open end (3) with closed end (2) and for passing through hollow stem (4), hollow stem is mounted to slide axially in the cylinder.Actuator includes center support (10), center support extends from the closed end of the cylinder inside bar and is carried on radially movable barrier (15) between indentation position and projecting positions, allow bar free to slide in indentation position, in projecting positions, barrier is bonded on the groove (9) in bar Nei, so as to relative to cylinder axially locking level, the flank of barrier and the flank of groove are configured to prevent from being retracted barrier by the movement of bar, barrier is arranged in the end of the spring scraper plate (14) longitudinally extended and is arranged to push barrier to projecting positions from indentation position, center support is carried for being bent scraper plate so that the controlled device (20) that barrier is retracted towards indentation position.)

1. a kind of telescopic actuator, the gas including the open end (3) with closed end (2) and for passing through hollow stem (4) Cylinder (1), the hollow stem are mounted to slide axially in the cylinder, and the actuator is characterized in that it includes central supported Part (10), the center support extend from the closed end of the cylinder inside the bar and are carried on indentation position Radially movable barrier (15), the indentation position allow the bar free to slide between projecting positions, described prominent It stretches in position, the barrier is bonded on the groove (9) in the bar Nei, described in axially locking relative to the cylinder The flank of bar, the flank of the barrier and the groove is configured to prevent from making by the movement of the bar barrier to contract The end of the spring scraper plate (14) longitudinally extended is arranged in into, the barrier and is arranged to the barrier from the contracting Carry, which is set, pushes the projecting positions to, and center support carrying is for being bent the scraper plate so that the barrier is towards institute State the controlled device (20) of indentation position retraction.

2. telescopic actuator according to claim 1, which is characterized in that for keeping the scraper plate curved described controlled Device includes unlock piston (20), and the unlock piston is mounted between resting position and unlocked position in the central supported Part axially slides on (10), and in the resting position, the unlocked position is far from the barrier, in the unlocked position In, the conical hollow end (22) of the unlock piston and finger (16) associated for being fixed to each barrier (15), with Plate benging is scraped described in making, and thus the barrier is made to be retracted into the indentation position from the projecting positions.

3. actuator as described in claim 1, which is characterized in that the bar (4) is associated with piston (5), for receiving The groove (9) for stating barrier is made for flush with the piston.

4. actuator according to claim 1, which is characterized in that the bar (4) is associated with piston (5), the piston It (5) include turning to cone (25), for forcing the barrier by being bent the scraper plate (14) while bar retraction (15) it is retracted.

Technical field

The present invention relates to a kind of telescopic actuators that band locks automatically.

Background technique

The present invention relates to a kind of telescopic actuator, which is fitted with for two element lockings are in place Device, the two elements in axial direction move relative to each other, such as are mounted to be telescopically slidable in the cylinder Bar.Certain actuators are fitted with for the in place, device especially in retraction position or in extended position by rod lock.

Pawl locking device includes the sleeve being typically mounted on bar first, and its tubular wall is cut open to form a fixed number The elastically deformable pawl of amount, these pawls are cantilever in the axial direction, are terminated by hook, next is arranged on cylinder Anchorage part cylinder, including for receiving the annular retraction of hook.Anchorage part includes step, the hook for passing through pawl in step Pawl is bent when sub- lower section.Annular retraction follows step to engage into hook, pawl can be made to return to cross step once hook To resting position.As hook is pushed back the lock piston for resisting returning spring and then axial movement by hook by step to cover The hook of pawl, and thus preventing claw is bent, so that hook is held captured in annular retraction, whereby by the lever lock of actuator Determine in place in the cylinder.

For unlock rod, it is sufficient lock piston reversion, so that pawl be made to be bent again, and makes anchorage part far from set Cylinder is mobile.Lock piston is mobile by means of the fluid-resistance reset spring under pressure, and it is mobile that this also makes bar, therefore does not need as lock Fixed piston provides individually control.

Segmented locking device includes the portion for being mounted to move radially on cylinder between indentation position and cooperation position Section, in indentation position, bar is free to slide in the cylinder, and in the coordination position, section is pushed by piston, itself is pushed away by spring It is dynamic, to penetrate the shell being arranged in bar or associated piston.Once section engages, piston just crosses section, to prevent them Retraction whereby locks bar relative to cylinder in place.

In both cases, locking depends on mobile lock piston.When lock piston reverse movement, barrier structure (hook of pawl, section) disengages, this can become possible by the inclined-plane being arranged in contact portion, to work as bar in the cylinder When mobile obstruction piece is pushed back.

In some cases, it has been observed that failure prevents latched position from covering obstruction piece, so that bar can not phase Cylinder is positively stopped.

Summary of the invention

Present invention trial proposes a kind of telescopic actuator equipped with automatic locking apparatus without lock piston.

In order to realize the purpose, a kind of telescopic actuator is provided, including with closed end and for keeping hollow stem logical The cylinder for the open end crossed, hollow stem are mounted to slide axially in the cylinder.According to the present invention, actuator includes central supported Part, center support extends from the closed end of the cylinder inside bar and is carried between indentation position and projecting positions radially can Mobile barrier, indentation position allows bar free to slide, and in projecting positions, barrier is bonded in the groove in bar, with Just relative to cylinder, axially locking level, the flank of barrier and the flank of groove are configured to prevent from making to hinder by the movement of bar Object is hindered to be retracted, barrier is arranged in the end of the spring scraper plate longitudinally extended and is arranged to from indentation position push barrier to Projecting positions, center support are carried for being bent scraper plate so that the controlled device that barrier is retracted towards indentation position.

Thus, under the action of scraper plate, locking is only automatically ensured that by the barrier being bonded in the groove in bar, obstacle Object is held in place by scraper plate (blade), without confirming this engagement by lock piston.In this way, any mobile bar is tasted Examination is all stopped by the associated between barrier and groove flank.Unlock needs operation in advance for making the curved device of scraper plate, from And it is detached from barrier, and bar is allowed to move freely.

In a preferred embodiment, for making the curved controlled device of scraper plate include unlock piston, unlock piston installation It is axially slided in center support between resting position and unlocked position, in resting position, unlocked position is separate Barrier unlocks the conical hollow end of piston and the finger associated for being fixed to each barrier, so as to scrape in unlocked position Plate benging, and thus barrier is made to be retracted into indentation position from projecting positions.

Detailed description of the invention

This is better understood according to the explanation of the specific embodiment of the invention below provided referring to each figure in attached drawing It invents, in attached drawing:

- Fig. 1 is provided with the cross-sectional view of the hydraulic actuator of locking device of the invention, which is in the locked position；

- Fig. 2 is the partial sectional view for carrying the sleeve of barrier of locking device；

- Fig. 3 is analogous to the view of Fig. 1, shows unlock piston and is activated；

- Fig. 4 is analogous to the view of Fig. 1, shows the bar to bounce back before latched position；And

- Fig. 5 is analogous to the view of Fig. 1, shows the bar extended before latched position.

Specific embodiment

With reference to Fig. 1, telescopic actuator of the invention includes cylinder 1, the cylinder 12 envelope of end wall by sealing at one end It closes, and is closed at the other end by end wall 3, which is pierced so that the bar 4 for being fixed to piston 5 passes through, and piston 5 is installed At along axis X in a sealing fashion in 1 internal slide of cylinder, to limit retraction hydraulic chamber 6 and to extend hydraulic chamber 7.It is logical Crossing causes bar 4 mobile relative to cylinder 1 one or the other pressurization in chamber.In this example, during bar 4 and piston 5 be Empty and they define that the groove 9 flushed with piston 5 is presented in internal axial shell 8, shell 8, groove 9 is with substantially vertical In the flank of axis X.Actuator further includes being screwed in from the center support 10 that in axial direction extends of sealing end wall 2 and having Locking bushing 11 thereon, as in Fig. 2 more specifically as it can be seen that the sleeve is in 8 internal stretch of bar-piston component axial shell.

Locking bushing 11 is usually tubulose, is terminated at one end by end wall 12, and by tapping extremity piece at the other end 13 terminate, for being screwed to center support 10.Locking bushing 11 has tubular wall, and longitudinal scraper plate 14 cuts the tubular wall, often The first end and free end for being fixed to locking bushing 11 is presented in a longitudinal direction scraper plate 14, should when scraper plate 14 remains static Free end carrying projects outwardly barrier 15, scraper plate as shown in the figure from locking bushing 11.Finger 16 is in locking bushing 11 Inside extend from each barrier 15 is longitudinal.Scraper plate 14 can be bent towards the inside of locking bushing 11, so that 15 diameter of barrier Mobile to ground towards indentation position, in indentation position, they are not from the outer surface projection of locking bushing 11.Then, scraper plate 14 Apply restoring force on barrier 15, pushes them to projecting positions.

Return to Fig. 1, it can be seen that the barrier 15 of locking bushing 11 is bonded in the groove 9 in piston 5, so that bar 4 exists It is locked into position in cylinder 1.The flank of barrier 15 and the flank of groove 9 are configured to prevent the movement of bar 4 from be retracted barrier, So that position shown in Fig. 1 is stable position.

For unlock rod 4, installation unlock piston 20 to slide in a sealing fashion in center support 10, so as to wherein Unlock chamber 21 is limited, the unlock room 21 is pressurized so that unlock piston 20 is mobile towards unlocked position, wherein the taper of piston Hollow end 22 and 16 associated of finger are to force scraper plate 14 to be bent, to make barrier 15 be retracted, so that bar 4 is released and can be certainly By sliding, as shown in Figure 3.When unlock chamber 21 is not pressurized, reset spring 23 makes to unlock piston 20 towards resting position shifting It is dynamic, in the resting position, unlock piston 20 far from finger 16, as shown in Figure 1.

It should be observed that the automatic locking once reaching latched position of bar 4, in latched position, bar 9 and barrier 15 are right Together.In the case shown in figure 4, bar 4 has bounced back and has been located at behind latched position, and barrier 15 keeps retraction, is pressed against The inner surface of axial shell 8 in bar 4.When to the pressurization of chamber 7 is extended, once groove is aligned with barrier 15, bar 4 just prolongs It stretches to curved scraper plate 14 towards its position for protruding into groove 9 and pushes barrier 15.In the case of fig. 5, bar 4 has been It being stretched out and is located at before latched position, barrier 15 has been returned to their projecting positions under the action of scraper plate, Because bar 4 and piston 5 are no longer aligned with barrier 15.To retraction chamber 6 pressurize when, bar 4 retraction and piston 5 behind Have in surface and turn to cone 25, to force barrier 15 to be retracted by being bent scraper plate 14, until under the inner wall that barrier passes through bar 4 Side.Once groove is aligned with barrier 15, bending scraper plate 14 pushes barrier 15 towards its position for protruding into groove 9.

The present invention is not limited to above description, and appoint brought by being covered in range defined by the claims on the contrary What modification.

Although the present invention can equally answer in particular, the present invention is described herein as being applied to hydraulic actuator For electromechanical actuator or the actuator of Technology of Hybrid Electric Vehicle.For example, unlock piston can be only by solenoid actuated.

Although in this example, latched position is the interposition between the retraction position and extended position of actuator It sets, but locking device of the invention can be used for being locked in one or the other in the two extreme positions.