CN208713133U - A kind of switching device and linear actuators of quick release mechanism - Google Patents

Abstract

The utility model discloses a kind of switching devices of quick release mechanism, quick release mechanism is mounted in linear brake, quick release mechanism includes rotation brake part, switching device is used for locking and unlocking rotation brake part, switching device includes pedestal, puller, the rotating bracket of positioning pin and middle part hingedly on the base, rotating bracket one end and positioning pin connection, the other end is pulled by puller, under puller pulling function, rotating bracket rotates so that positioning pin is detached from rotation brake part, rotating bracket by puller one end pulled and is provided with dynamic clamping head and quiet clamping head between pedestal, the utility model controls positioning pin and the grafting of rotation brake part by rotating bracket and is braked with preventing rotation brake part from continuing to rotate, this mode of braking, structure is simple, it is at low cost, the space occupied is small simultaneously；The utility model additionally provides a kind of linear actuators, and rotation brake part is driven by the switching device of quick release mechanism.

Description

A kind of switching device and linear actuators of quick release mechanism

Technical field

The utility model belongs to Linear transmission technical field, and in particular to a kind of switching device and line of quick release mechanism Property actuator.

Background technique

Linear actuators, also referred to as electric pushrod are widely used in furniture, Medical Devices, solar power generation etc. field, Primary structure includes driving motor, geared worm, worm gear, screw rod, nut, and working principle is that driving motor driving geared worm turns Dynamic, geared worm engages that worm gear is driven to rotate with worm gear, and worm gear rotation drives screw rod rotation, and screw rod rotation drives nut shaft To movement, nut is generally connected with inner tube, to realize the telescopic moving of inner tube.

Existing linear actuators on the market is much provided with relieving mechanism, relieving mechanism purpose between transmission parts It is when being that driving motor runs out of steam, nut can be driven in the reverse direction screw rod rotation, be equivalent to a releasing linear actuators certainly The device of power is locked, relieving mechanism is by needing a switching device to be controlled, and the generally existing structure of current switching device Complexity operates not laborsaving enough problem.

Utility model content

Technical problem to be solved in the utility model is just to provide a kind of switch of the quick release mechanism of rapid operation Device and linear actuators.

In order to solve the above technical problems, the utility model adopts the following technical solution: a kind of switch of quick release mechanism Device, quick release mechanism are mounted in linear actuators, and quick release mechanism includes rotation brake part, and quick release mechanism is logical It crosses the rotation of control rotation brake part and is in release conditions or lockup state to control linear actuators, switching device is for locking With unlock rotation brake part, switching device includes pedestal, puller, middle part rotating bracket hingedly on the base and can be with rotation The positioning pin that the grafting of transformation of ownership moving part rotates to prevent spin-ended transformation of ownership moving part, rotating bracket one end and positioning pin connection, the other end is by drawing Dynamic device pulls, and under puller pulling function, rotating bracket rotates so that positioning pin is detached from rotation brake part, rotating bracket Dynamic clamping head and quiet clamping head is provided between the one end pulled by puller and pedestal.

Preferably, rotating bracket includes the hinge bar hinged with pedestal and the rotating bar that rotates with hinge bar, rotating bar On be provided with locating shaft, dynamic clamping head and quiet clamping head is socketed on locating shaft.

Preferably, being provided with the through-hole passed through for positioning pin on pedestal, the end that rotating bar is connected with positioning pin is arranged There are the avoid holes for positioning pin sliding.

Preferably, positioning pin includes pin shaft, one end of rotation brake part towards pin shaft is provided with positioning protrusion, pin shaft court The groove cooperated with positioning protrusion is provided with to one end of rotation brake part.

Preferably, positioning pin further include prevent pin shaft be detached from rotating bar retention bead and locating part, retention bead and Locating part is located at the two sides of rotating bar, and locating part is screw, and screw is connected to one end that pin shaft passes through avoid holes, on screw It is equipped with the gasket for preventing screw to be detached from avoid holes, gasket is located between the head and rotating bar of screw.

Preferably, avoid holes are kidney slot, it is provided with the limiting slot for preventing pin shaft from rotating in avoid holes on pin shaft, is limited The slot bottom of position slot and the side wall of kidney slot offset.

Preferably, puller includes the sliding block being slidably installed on the base, the sliding with sliding block is connected on sliding block and The pressing plate of rotating bracket is pressed, the free end of pressing plate is tilted to pedestal direction.

Preferably, be provided with sliding slot on sliding block, be provided on pedestal sliding rail, sliding slot and sliding rail cooperation to prevent limited slip block from Sliding rail falls off.

Preferably, pedestal includes the baffle for being connected to extreme, puller further includes being connected across baffle with sliding block Drag-line, be socketed with reset spring on drag-line, the both ends of reset spring offset with sliding block and baffle respectively.

Compared with prior art, the utility model has the beneficial effects that

1, in the state that puller does not pull, rotating bracket one end keeps flat between dynamic clamping head and quiet clamping head and puller Weighing apparatus, the positioning pin of the other end connection of rotating bracket is socketed on rotation brake part at this time, to lock rotation brake part, is prevented Rotation brake part rotates；Under puller pulling function, one end of rotating bracket is rotated by the extruding of puller It is close to pedestal direction, dynamic clamping head and quiet clamping head is squeezed, the other end of rotating bracket drives positioning pin to far from rotation brake part at this time Direction rotation so that positioning pin is detached from rotation brake part, to unlock rotation brake part, i.e., rotation brake part can occur from By rotating；After no longer pulling brake, brake no longer presses rotating bracket to dynamic clamping head and quiet clamping head direction, rotating bracket It rotates under the elastic force effect of dynamic clamping head and quiet clamping head, one end resets, and the positioning pin of the other end is socketed in rotation brake part again On.Positioning pin and the grafting of rotation brake part is controlled using rotating bracket to be braked to prevent rotation brake part from continuing to rotate, this Kind mode of braking, structure is simple, at low cost, while the space occupied is small, makes the structure of switching device more compact.In addition, with Puller presses rotating bracket, very laborsaving, does not need to may make rotation to the end generation great role power of rotating bracket Bracket rotates.

2, the position that dynamic clamping head and quiet clamping head is limited by locating shaft, guarantees the stability of dynamic clamping head and quiet clamping head, prevents elastic reset Part is detached from rotating bar, while dynamic clamping head and quiet clamping head is movably connected in rotating bar by locating shaft, maintenance easy to produce.

3, the gap in order to prevent between through-hole and positioning pin it is excessive so that pedestal can not waterproof, guarantee the waterproof of through hole Effect, positioning pin is passed through from through-hole and the inner wall of the outer wall of positioning pin and through-hole is affixed；In order to solve to lead because through-hole is too small The problem of positioning pin of cause can not pass through through-hole with the rotation of rotating bar, the end that rotating bar is connected with positioning pin is provided with confession The avoid holes of positioning pin sliding, when rotating bar is to when rotation, positioning pin is mobile with rotating bar, while positioning pin is in rotating bar Avoid holes sliding, prevents positioning pin from can not rotate with rotating bar due to being blocked by through-hole edge.

4, retention bead and locating part are located at the two sides of rotating bar, prevent pin shaft in avoid holes along the axial direction of pin shaft It is mobile, prevent positioning pin to be detached from rotating bar, gasket is located between the head and rotating bar of screw, and gasket increases screw and evacuation The contact area between rotating bar around hole, fixed effect are more preferable.

5, when pin shaft is socketed on braking worm screw, positioning protrusion is caught in groove, the side wall phase of positioning protrusion and groove It supports, prevents braking worm screw from rotating.

6, the slot bottom of limiting slot and the side wall of kidney slot offset, so that pin shaft can only slide in avoid holes, prevent pin shaft Rotating in avoid holes causes groove that can not be aligned with positioning protrusion, guarantees pin shaft to the stability of braking worm screw limit.

7, when sliding block by pull slided along pedestal when, the pressing plate positioned at rotating bracket top is mobile with sliding block, with turn The position of the pressing plate of dynamic bracket contact and the distance between pedestal are smaller and smaller, and pressing plate squeezes the one of rotating bracket to pedestal direction End, so that rotating bracket rotates；When sliding block resets, pressing plate is resetted with sliding block, no longer extruding rotating bracket, so that rotation Bracket can reset.

8, sliding slot and sliding rail cooperation fall off to prevent limited slip block from sliding rail, so that sliding block can only be moved along the direction of sliding rail, The displacement on other directions occurs on the base for anti-limited slip block so that pressing plate is detached from rotating bracket, guarantee rotating bracket and pressure Plate is stably connected with.

9, when pulling drag-line, sliding block is mobile to baffle direction, reset bullet of the ram extrusion between sliding block and baffle Spring, reset spring compression, when no longer pulling drag-line, sliding block automatically resets under the elastic force effect of reset spring.

Compared with prior art, the utility model controls positioning pin and the grafting of rotation brake part by rotating bracket to prevent Rotation brake part, which continues to rotate, to be braked, and this mode of braking, structure is simple, at low cost, while the space occupied is small, gets out of the way The structure for closing device is more compact.In addition, rotating bracket is pressed with puller, and it is very laborsaving, do not need the end to rotating bracket Portion, which generates great role power, may make rotating bracket to rotate.

The utility model additionally provides a kind of linear actuators, including geared worm, worm gear, screw rod, nut, geared worm Worm gear rotation is driven, worm gear rotation drives screw rod rotation, and screw rod rotation drives nut axial movement, is equipped between worm gear and screw rod Relieving mechanism, which is characterized in that quick release mechanism includes planetary gear set, and planetary gear set includes ring gear, the sun Gear, planetary gear, planet carrier, sun gear and worm gear rotate synchronously, and planet carrier and screw rod rotate synchronously, quick release mechanism It further include the rotation brake part for being braked to ring gear, rotation brake part is driven by the switching device of above-mentioned quick release mechanism It is dynamic.

Detailed description of the invention

The utility model is further described with reference to the accompanying drawings and detailed description:

Fig. 1 is the structural schematic diagram of two linear actuator of embodiment；

Fig. 2 is the structural schematic diagram for not installing the linear actuators of box cover in embodiment two；

Fig. 3 is the portion the A enlarged drawing of Fig. 2；

Fig. 4 is the connection schematic diagram of rotation brake part and positioning pin in embodiment one；

Fig. 5 is the portion the B enlarged drawing of Fig. 4；

Fig. 6 is the explosive view of switching device in embodiment one；

Fig. 7 is the schematic diagram of sliding block in embodiment one；

Fig. 8 is the connection schematic diagram of drag-line and reset spring in embodiment one；

Fig. 9 is the perspective view of the explosion one of two linear actuator of embodiment；

Figure 10 is the perspective view of the explosion two of two linear actuator of embodiment；

Figure 11 is the schematic diagram of internal structure of two linear actuator of embodiment；

Figure 12 is the partial sectional view of two linear actuator of embodiment.

Specific embodiment

Implementation referring to figs. 1 to Figure 12 to the switching device and linear actuators of a kind of quick release mechanism of the utility model Example is described further.

In the following description, occur term "inner", "outside", "upper", "lower", the indicating positions such as "left", "right" or Positional relationship is to be based on the orientation or positional relationship shown in the drawings, description embodiment merely for convenience and simplified description, and It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because This should not be understood as limiting the present invention.

Embodiment one

The present embodiment is a kind of switching device of quick release mechanism, and in the present embodiment, quick release mechanism installation is online Property actuator in, quick release mechanism includes rotation brake part, rotation brake part preferably brake worm screw 6, for convenience lock Worm screw 6 is braked in fixed or unlock, the switching device that a control braking worm screw 6 locks or unlocks is preferably provided in the present embodiment, such as Shown in Fig. 2 and Fig. 3, switching device includes the rotating bracket 72 that pedestal 7, puller 73, middle part are hinged on pedestal 7 and can be with The positioning pin 74 that the grafting of rotation brake part rotates to prevent spin-ended transformation of ownership moving part, 72 one end of rotating bracket are connect with positioning pin 74, separately One end is pulled by puller 73, and rotating bracket 72 by the one end pulled of puller 73 and is provided with dynamic clamping head and quiet clamping head between pedestal.

In the state that puller 73 does not pull, 72 one end of rotating bracket is kept between dynamic clamping head and quiet clamping head and puller 73 Balance, the positioning pin 74 of the other end connection of rotating bracket 72 is socketed on braking worm screw 6 at this time, so that braking worm screw 6 is locked, Prevent braking worm screw 6 from rotating；Under 73 pulling function of puller, extruding of the one end of rotating bracket 72 by puller 73 It rotates close to 7 direction of pedestal, squeezes dynamic clamping head and quiet clamping head, the other end of rotating bracket 72 drives positioning pin 74 to remote at this time Direction rotation from braking worm screw 6 brakes worm screw 6 to unlock so that positioning pin 74 is detached from braking worm screw 6, i.e. braking worm screw 6 It can be freely rotated；After no longer pulling brake, brake no longer presses rotating bracket to dynamic clamping head and quiet clamping head direction 72, rotating bracket 72 rotates under the elastic force effect of dynamic clamping head and quiet clamping head, and one end resets, and the positioning pin 74 of the other end is again It is socketed on braking worm screw 6.

It should be noted that braking worm screw 6 is substantially that the one of of rotation brake part in quick release mechanism implements Mode, although illustrating switching device in the present embodiment for what is locked or unlocked is braking worm screw 6, those skilled in the art Member will be appreciated that switching device was unlocked or locked is not limited to only brake worm screw 6, and rotation brake part is also possible to other Structure, it is not limited to brake worm screw 6.Therefore in other embodiments, when the rotation brake part in quick release mechanism uses When switching device in the present embodiment, it should be understood that fall into the protection scope of the utility model.

As shown in fig. 6, rotating bracket 72 includes the hinge bar 721 hinged with pedestal 7 and the rotation that rotates with hinge bar 721 Bar 722 is provided with locating shaft 7221 in rotating bar 722, and dynamic clamping head and quiet clamping head is socketed on locating shaft 7221, and the two of dynamic clamping head and quiet clamping head End offsets with pedestal 7 and rotating bar 722 respectively, and the position of dynamic clamping head and quiet clamping head is limited by locating shaft 7221, guarantees elastic reset The stability of part prevents dynamic clamping head and quiet clamping head to be detached from rotating bar 722, while dynamic clamping head and quiet clamping head is movably connected in by locating shaft 7221 In rotating bar 722, maintenance easy to produce, dynamic clamping head and quiet clamping head is preferably spring.

The through-hole 713 passed through for positioning pin 74 is provided in the present embodiment on pedestal 7, in order to prevent through-hole 713 and positioning Gap between pin 74 it is excessive so that pedestal 7 can not waterproof, guarantee the waterproof effect at through-hole 713, positioning pin 74 is from through-hole 713 In pass through and the outer wall of positioning pin 74 and the inner wall of through-hole 713 are affixed；In order to solve because through-hole 713 it is too small caused by positioning pin 74 the problem of can not passing through through-hole 713 with the rotation of rotating bar 722, in the present embodiment, rotating bar 722 is connected with positioning pin 74 End be provided with for positioning pin 74 slide avoid holes 7222, when rotating bar 722 to rotation when, positioning pin 74 is with rotating bar 722 is mobile, while avoid holes 7222 of the positioning pin 74 in rotating bar 722 are slided, and prevent positioning pin 74 due to blocking through-hole 713 It can not be rotated with rotating bar 722.

Positioning pin 74 is detached from rotating bar 722 in order to prevent, and in the present embodiment, positioning pin 74 includes pin shaft 741 and anti-fastening Position pin 74 is detached from the retention bead 743 and locating part 742 of rotating bar 722, and as shown in Figure 3 and Figure 6, retention bead 743 is looped around On pin shaft 741, retention bead 743 and locating part 742 are located at the two sides of rotating bar 722, prevent pin shaft 741 in avoid holes Along the axial movement of pin shaft 741 in 7222,741 locating part 742 of pin shaft is preferably screw, and screw is connected to pin shaft 741 and passes through One end of avoid holes 7222 can wear gasket 8 on screw, and gasket 8 is located between the head and rotating bar 722 of screw, gasket 8 The contact area between the rotating bar 722 around screw and avoid holes 7222 is increased, fixed effect is more preferable.

As shown in Figure 4 and Figure 5, braking worm screw 6 is towards being provided with one or more positioning on the side wall of one end of pin shaft 741 Protrusion 61, one end of pin shaft 741 towards braking worm screw 6 are provided with one or more grooves 7411 cooperated with positioning protrusion 61, Two positioning protrusion 61 are preferably provided with, two positioning protrusion 61 are symmetrical about the central axes of pin shaft 741, when 741 sets of pin shaft It connects when braking on worm screw 6, positioning protrusion 61 is caught in groove 7411, and positioning protrusion 61 and the side wall of groove 7411 offset, and is prevented Only braking worm screw 6 rotates, and for symmetrically arranged positioning protrusion 61 when the side wall with groove 7411 offsets, stress is more equal It is even, extend the service life of braking worm screw 6.

As shown in Figure 3 and Figure 6, avoid holes 7222 are kidney slot, and being provided on pin shaft 741 prevents pin shaft 741 in avoid holes The limiting slot 7412 rotated in 7222, the slot bottom of limiting slot 7412 and the side wall of kidney slot offset, so that pin shaft 741 can only kept away It allows in hole 7222 and slides, preventing pin shaft 741 from rotating in avoid holes 7222 causes groove 7411 and positioning protrusion 61 can not Alignment guarantees the stability that 741 pairs of pin shaft braking worm screws 6 limit.

In the present embodiment, puller 73 includes the sliding block 731 being slidably mounted on pedestal 7, is connected on sliding block 731 with cunning The free end of the sliding of block 731 and the pressing plate 732 for pressing rotating bracket 72, pressing plate 732 is tilted to 7 direction of pedestal, pressing plate 732 One end is connected on the side wall vertical with glide direction of sliding block 731, and one end opposite with connecting pin is free end, works as sliding block 731 by pull slided along pedestal 7 when, the pressing plate 732 positioned at 72 top of rotating bracket is mobile with sliding block 731, with rotation branch The position for the pressing plate 732 that frame 72 contacts and the distance between pedestal 7 are smaller and smaller, and pressing plate 732 squeezes rotation branch to 7 direction of pedestal One end of frame 72, so that rotating bracket 72 rotates；When sliding block 731 resets, pressing plate 732 is resetted with sliding block 731, is no longer squeezed Rotating bracket 72 is pressed, rotating bracket 72 is resetted.

As shown in fig. 6, being provided with the slide protrusion of " L " type on sliding block 731, slide protrusion is arranged in parallel with two rows, two rows of Slide protrusion bends inwards to form sliding slot 711 towards one end of pedestal 7, bends inwards and is referred to two rows of slide protrusions herein Between bend, the sliding rail 712 of " L " type is provided on pedestal 7, sliding rail 712 is arranged in parallel with two rows, two rows of 712 bent outwards of sliding rail Folding, herein outward bending refer to bending to the direction far from adjacent sliding rail 712, and sliding slot 711 and the cooperation of sliding rail 712 are to prevent on-slip Block 731 falls off from sliding rail, so that sliding block 731 can only be moved along the direction of sliding rail, on pedestal 7 it occurs for anti-limited slip block 731 So that pressing plate 732 is detached from rotating bracket 72, guarantee rotating bracket 72 and pressing plate 732 are stably connected with the upward displacement of other party.

As shown in figure 3, pedestal 7 includes the baffle 714 for being connected to extreme, puller 73 further includes across baffle 714 The drag-line 733 being connected with sliding block 731,733 one end of drag-line are socketed with reset spring 734, the both ends of reset spring 734 respectively with cunning Block 731 and baffle 714 offset, and the positioning ring 7331 to offset with baffle 714 is provided on drag-line 733, and baffle 714 is located at positioning ring Between 7331 and reset spring 734 when pulling drag-line 733, sliding block 731 is mobile to 714 direction of baffle, and the extruding of sliding block 731 is located at Reset spring 734 between sliding block 731 and baffle 714, reset spring 734 compress, when no longer pulling drag-line 733, sliding block 731 It automatically resets under the elastic force effect of reset spring 734, until positioning ring 7331 circular on drag-line 733 offsets with baffle 714, The reset of sliding block 731 at this time terminates, and positioning ring 7331 plays the role of positioning sliding block 731.Drag-line 733 has two in the present embodiment, The terminal of two drag-lines 733 may be mounted at different location, user-friendly.

Pedestal 7 can be an individual part, be also possible to be integrally formed with shell 91, preferred pedestal in the present embodiment 7 be an individual part.

In order to preferably cover the structures such as sliding block 731, switching device further includes box cover 23 in the present embodiment, the box cover 23 It is connect with pedestal 7, box cover 23 is to be articulated and connected with pedestal 7, while being also provided with the buckle of locking in the present embodiment, pedestal 7 On then be provided with corresponding block button hole.Components can not only be played with screening effect using box cover 23, while also can be to rotation The components such as bracket 72, puller 73 play a protective role.

Embodiment two

The present embodiment be a kind of linear actuators, the present embodiment linear actuator include driving motor 1, geared worm 2, Worm gear 3, screw rod 4, nut 5, driving motor 1 connect geared worm 2, and geared worm 2 drives worm gear 3 to rotate, and the rotation of worm gear 3 drives Screw rod 4 rotates, and the rotation of screw rod 4 drives nut 5 to move axially, in addition, further including shell 91, outer tube 92, inner tube in the present embodiment 93, the nut 5 is connect with inner tube 93, and shell 91 is connect with outer tube 92, and driving motor 1 is fixedly mounted in shell 91, nut 5 Axial movement be eventually exhibited as the axially opposing displacement between inner tube 93 and outer tube 92.

It is additionally provided with planetary gear set between worm gear 3 and screw rod 4 in the present embodiment, for details, reference can be made to Fig. 9 to Figure 11, planets For gear assembly for the transmission connection between worm gear 3 and screw rod 4, planetary gear set includes ring gear 10, sun gear 11, row Star gear 12, planet carrier 13, sun gear 11 are located in ring gear 10, and planetary gear 12 is engaged on ring gear 10 and sun gear Between 11, while 12 axis rotation of planetary gear is mounted on planet carrier 13.Sun gear 11 and the snail in the present embodiment Wheel 3 rotates synchronously, and planet carrier 13 and screw rod 4 rotate synchronously, preferably through flower between planet carrier 13 and screw rod 4 in the present embodiment Key is cooperatively connected, and is additionally arranged planetary gear set between worm gear 3 and screw rod 4, can be with by the transmission effect of planetary gear set Reduce the revolving speed of worm gear 3, the torque of screw rod 4 is improved, so that screw rod 4 be allowed to have bigger thrust；

In addition, being also provided with brake in the present embodiment, which is used to generate braking to ring gear 10 to limit it It is freely rotated.When linear actuators does not need release function, i.e., in the unreleased state, brake makes ring gear 10 Dynamic, ring gear 10 cannot be freely rotated at this time.Under 1 active drive of driving motor, worm gear 3 drives sun gear 11 to rotate, too Positive gear 11 drives planetary gear 12 to rotate in ring gear 10, while the also corresponding rotation of planet carrier 13, due to planet carrier 13 with Screw rod 4 rotates synchronously, therefore finally realizes that screw rod 4 rotates；

Conversely, in the unreleased state, when driving motor 1 runs out of steam, and screw rod 4 is driven in the reverse direction, the row to be driven of screw rod 4 Carrier 13 rotates, and since ring gear 10 cannot be freely rotated, only under 11 rotation situation of sun gear, planet carrier 13 could turn It is dynamic, however sun gear 11 is synchronous with the holding of driving motor 1, therefore sun gear 11, in motionless situation, screw rod 4 cannot turn Dynamic, in other words, when driving motor 1 runs out of steam, screw rod 4 can not be rotated backward.

However in this case, when user needs that screw rod 4 can also be allowed reversely to turn when driving motor 1 runs out of steam It is dynamic, it is necessary to use release function, in the released state, brake unclamps ring gear 10, and ring gear 10 can be free at this time Rotation.When driving motor 1 runs out of steam down, screw rod 4 is driven in the reverse direction, and drives planet carrier 13 to rotate, although sun gear 11 at this time It can not still rotate, but ring gear 10 can be freely rotated at this time, planet carrier 13 can be with ring gear 10 together along sun tooth at this time The axle center of wheel 11 rotates together.In other words, in the released state, even driving motor 1 runs out of steam, and screw rod 4 also can be real Now it is freely rotated.

Therefore the present embodiment is the architectural characteristic that planetary gear set is utilized in fact, completes the release function of linear actuators Can, belong to a kind of new structural framing, planetary gear set quite in this present embodiment can be as raising driving torque Effect, but also become one of part of quick release mechanism in linear actuators, relative to traditional quick release machine For structure needs additional two shaft coupling components, quick release mechanism does not need two shaft coupling components in the present embodiment, because interior Gear ring 10 also acts as the work of shaft coupling component in quick release mechanism while as a component in planetary gear set With i.e. ring gear 10 can be completed at the same time two effects in the present embodiment, and such structure designs so that linear actuators Internal structure is more compact.

The structure of brake can there are many embodiment, in the present embodiment preferably wherein a kind of embodiment carry out it is specific It is unfolded, the brake in the present embodiment includes braking worm screw 6, while an outer gear ring 15, the outer gear ring are also set up in the present embodiment 15 with ring gear 10 be to rotate synchronously, outer gear ring 15 and the braking engaged transmission of worm screw 6.When braking worm screw 6 can be freely rotated, external tooth Circle 15, ring gear 10 can also be freely rotated, and when braking worm screw 6 and cannot be freely rotated, it is equivalent to outer gear ring 15, ring gear 10 It cannot be freely rotated, so as to pass through the rotatably mounted release function to realize linear actuators of control braking worm screw 6.

In the present embodiment, linear actuators further includes the switching device in embodiment one, switching device by with braking snail Bar 6 connects or separates the stopping or rotation for realizing braking worm screw 6.

In the present embodiment, ring gear 10 and outer gear ring 15 are preferably integral structure, and ring gear 10 is in radially inner side, outer gear ring The step of 15 in radial outside, and integral structure eliminates ring gear 10 and the connection of outer gear ring 15, certainly, those skilled in the art Be readily apparent that between ring gear 10 and outer gear ring 15 can by be fixedly connected or spline fitted mode come realize rotate synchronously, this Class embodiment is each fallen in the protection scope of the utility model.

Brake is arranged to brake this structure of worm screw 6 by the present embodiment, and braking worm screw 6 can be used as an additional drive Flowing mode drives linear actuators, because when rolling brake worm gear 3, braking worm gear 3 when driving motor 1 runs out of steam It will drive outer gear ring 15 accordingly to rotate, ring gear 10 also can be rotated accordingly, and sun gear 11 is fixed at this time, therefore internal tooth Circle 10 will drive planetary gear 12 when rotating, planet carrier 13 rotates together, and is equivalent to and will drive the rotation of screw rod 4, therefore brake is adopted With the structure of braking worm screw 6, can be driven in the case where driving motor 1 runs out of steam as a kind of additional driving method Linear actuator movement.

Driving braking worm screw 6 is rotated, further includes the auxiliary drive for driving the braking worm gear 3 to rotate in the present embodiment Device, the auxiliary actuator are electric drive or driven by shaking.Driving can be realized to braking worm screw 6 with additional stand-by motor, When driving motor 1 breaks down or runs out of steam, stand-by motor can be used as auxiliary power source driving；Certain auxiliary actuator It is also possible to driven by shaking, i.e., braking worm screw 6 is driven to rotate by hand mode.

The linear actuators further includes gear-box, and shown gear-box is assembled by two and half gear housing 25a and formed, described Planetary gear set is mounted in gear-box, and the braking worm gear 3 is rotatably installed in gear-box, in order to allow braking worm screw 6 to pacify Fill it is more stable, two and half gear housing 25a be provided with for braking worm screw 6 install installation hole location 2501 so that system Dynamic 6 both ends of worm screw can realize positioning.

About package assembly of the planetary gear set in gear-box 25, reference can be made to shown in Fig. 9 to Figure 10, in the present embodiment Improvement is also optimized to the package assembly of planetary gear set, so that its assembling is more compact, volume is smaller, specifically such as Under:

Linear actuators in the present embodiment further includes a support base 26, the tail drawing of the support base 26 and linear actuators 27 are fixedly connected, and support base 26 is located at the side that planetary gear set draws 27 towards tail, and it is sliding that first is set on institute's support base 26 The tail end of set 28, first sliding sleeve 28 is equipped with the first limit stop ring 28a, and the sun gear 11 is sleeved on the first sliding sleeve 28 And it is axially positioned between the first limit stop ring 28a and planet carrier 13 or screw rod 4.

Since sun gear 11 is to realize assembling, the first sliding sleeve by the first sliding sleeve 28 with the first limit stop ring 28a 28 pairs of sun gears 11 both realize radial positioning, also realize axially position, more compact in structure for bearing, especially It is that radial space is smaller, can significantly reduce the internal space requirements to gear-box 25, and increase for bearing Add axial positioning function, in addition assemble the assembling difficulty that difficulty is significantly less than bearing, and the cost of the first sliding sleeve 28 is also wanted It is significantly less than bearing.

Meanwhile worm gear 3 in order to facilitate the installation of, the present embodiment worm gear 3 are also to be installed sliding sleeve by way of, specifically and Speech, the support base 26 include center pillar 29 and the collar wall 30 positioned at 29 outer circumferential of center pillar, and first sliding sleeve 28 is sleeved on On center pillar 29, the second sliding sleeve 31 is set in the collar wall 30, the worm gear 3 is sleeved on the second sliding sleeve 31.After assembling Assembly relation can be found in Figure 12, and worm gear 3 realizes assembling, more compact, the diameter of the second sliding sleeve 31 in structure by the second sliding sleeve 31 It is smaller to space.In addition, since sun gear 11, worm gear 3 are assembled in one by the first sliding sleeve 28, the second sliding sleeve 31 respectively simultaneously On a support base 26, center pillar 29 and peripheral wall are preferably arranged concentrically in the present embodiment, therefore work as sun gear 11 and worm gear 3 simultaneously When being mounted on a support base 26, the available good guarantee of the concentricity of the two, i.e., between worm gear 3 and sun gear 11 Concentricity is more preferable, and the precision of transmission is more preferable.

Preferably, the tail end of the second sliding sleeve 31 described in the present embodiment be equipped with prevent worm gear 3 towards tail end it is mobile the Two limit stop ring 31a, radial positioning and axially position can also be realized to worm gear 3 simultaneously by being equivalent to the second sliding sleeve 31, and worm gear 3 Front end then carries out axial limiting by sun gear 11, and the worm gear 3 is equipped with centre bore 3a, during the sun gear 11 partially protrudes into Heart hole 3a, the worm gear 3 are equipped with the auxiliary baffle for preventing sun gear 11 mobile towards tail end direction, auxiliary gear at centre bore 3a Piece is the step structure being located in centre bore 3a, and specific structure can specifically be unfolded below, the end face of sun gear 11 and auxiliary Baffle offsets to form axially position, and in other words, the tail end of worm gear 3 is limited by the second limit stop ring 31a of the second sliding sleeve 31, snail The front end of wheel 3 is limited by sun gear 11, and this positioning method structure is more compact, and cost is lower, while being assembled also more square Just.

In addition, in the present embodiment screw rod 4 be with planet carrier 13 rotate synchronously, sun gear 11 with screw rod 4, planet carrier 13 When relatively rotating, can there are problems that rubbing between the two or wear, in order to reduce sun gear 11 and screw rod 4 or planet Friction between frame 13 is equipped with friction pad 32, friction pad 32 between the front end and planet carrier 13 or screw rod 4 of the sun gear 11 Rub proofness it is more preferable.Friction pad 32 can also play the role of to 11 axially position of sun gear in the present embodiment simultaneously.

Friction pad 32 in order to facilitate the installation of, be equipped in the planet carrier 13 axially through mounting hole, the friction pad 32, Screw rod 4 is installed in mounting hole, and the friction pad 32 is axially positioned between sun gear 11 and screw rod 4.After the completion of positioning Schematic diagram can be found in Figure 12.

In addition, for the assembling mode between planetary gear set, worm gear 3,26 internal structure of support base and gear-box 25, The present embodiment is preferably specific as follows:

For support base 26, the collar wall 30 of the support base 26, which radially extends, is equipped with retainer ring 26a, the gear-box 25 inner wall is equipped with the card slot 2502 for clamping the retainer ring 26a, and retainer ring 26a is non-circular structure, retainer ring 26a in the present embodiment Cross section be preferably octagon, card slot 2502 is also set accordingly into respective shapes, and retainer ring 26a is snap-fit in card slot 2502 Afterwards, support base 26 can not be freely rotated in gear-box 25.

For the ring gear 10 in planetary gear set, the inner wall of the gear-box 25 is equipped with the first annular groove 2503, the One annular groove 2503 is located at the front side of card slot 2502, and the peripheral side of the ring gear 10 is equipped with the first bulge loop 10a, the first bulge loop 10a It is installed in the first annular groove 2503, such ring gear 10 is axially assembled on gear-box 25 by the first bulge loop 10a, simultaneously also It can be rotated on gear-box 25.

Certainly, preferably, in the present embodiment additional one between ring gear 10 and the inner wall of gear-box 25 Third sliding sleeve, for reducing the friction between 25 inner wall of gear-box and ring gear 10, the third sliding sleeve outer wall is mounted on first In mounting groove, inner wall be equipped with matched second annular groove 3301 of the first bulge loop 10a, the third sliding sleeve is by two and half ring sets 33a composition.

For screw rod 4, it is arranged with bearing outside the screw rod 4, specifically, it is to be sleeved on planet carrier 13 that bearing, which has half, On, the other half is sleeved on screw rod 4 by a bearing holder (housing, cover) 39, and the inner wall of the gear-box 25 is equipped with the axis of installation bearing 38 Hold slot 2504.

As shown in Figure 9 and Figure 10, in order to make planetary gear set operably more stable, the present embodiment is to planetary gear set It is correspondingly improved, specific as follows:

The planetary gear set further includes planetary gear retainer 34, and the planetary gear retainer 34 is equipped with first Location hole 34a and second location hole 34b, planetary gear retainer 34 are fixedly connected by second location hole 34b with planet carrier 13, The planet wheel spindle 35 for installing planetary gear 12 is provided on planet carrier 13, planetary gear 12 is sleeved on planet wheel spindle 35, Described 35 one end of planet wheel spindle is mounted on planet carrier 13, and the other end is mounted in first positioning hole 34a.

The present embodiment improves planetary gear retainer 34, and traditional planet wheel spindle 35 only has one end rotation in planet On frame 13,12 frame of planetary gear is only to be kept fixed with planet carrier 13, and be provided on planet wheel spindle 35 in the present embodiment It is used to support the first positioning hole 34a of planet wheel spindle 35, so that the both ends of planet wheel spindle 35 can be supported, allows planet The circle beating degree of wheel shaft 35 is smaller, and stability is more preferable, and planetary gear 12 can be highly stable in transmission process.

By there are three planetary gears 12 in this present embodiment, therefore 35 phase of the present embodiment planet wheel spindle should have three, and first is fixed There are three position hole 34a is then corresponding, and second location hole 34b, preferably it is arranged between adjacent first positioning hole 34a, therefore this reality Apply a second location hole 34b also it is corresponding preferably there are three.

Planet wheel spindle 35 is pierced by disengaging from planetary gear retainer 34 in order to prevent, and the planet wheel spindle 35 is towards planet 34 one end of retainer for gear is equipped with stage portion, and the stage portion is by 34 axially position of planetary gear retainer.In order to reduce The end face of planetary gear 12 and the friction of planetary gear retainer 34, the planetary gear retainer 34 is in second location hole 34b Side be extended with raised surrounding edge 34c towards 13 direction of planet carrier, after raised surrounding edge 34c is set, the end face of planetary gear 12 only with Raised surrounding edge 34c contact, can effectively reduce contact area.

The planetary gear retainer 34 is equipped with the gear grooved 34d of accommodating planetary gear 12, more preferably to planetary gear 12 realizations are held in position.There are three planetary gear 12 is set as described in the present embodiment, the gear grooved 34d also phase Ying Yousan A, three gear grooved 34d are circumferentially spaced, and the first positioning hole 34a is between adjacent gear grooved 34d, such knot Structure design more compact and reasonable.

In addition, being equipped with the shaft coupling of monodirectional locking, the connection of monodirectional locking between the worm gear 3 and screw rod 4 in the present embodiment Axis device can allow driving force normally to transmit when effect is normal direction driving rotation, conversely, when being driven in the reverse direction rotation, meeting Play the role of locking or prevention to driving force, be with playing in the present embodiment: when worm gear 3 is used as main driving When, it can normally drive screw rod 4 to be rotated, conversely, when screw rod 4 is as main driving then resistance can be played to the rotation of screw rod 4 Buddhist nun's effect, prevents screw rod 4 from continuing to rotate, this is the reverse self-locking power for improving linear actuators in fact.

The shaft coupling of monodirectional locking is also disclosed in existing machinery field, is had in the present embodiment to the shaft coupling of monodirectional locking Institute's Optimal improvements, the shaft coupling include transmission torsional spring 35 and the damping ring with the suit of transmission torsional spring 35,3 active of worm gear, screw rod 4 Under driven state, worm gear 3, which transmits torque, to transmission torsional spring 35 and makes transmission torsional spring 35 and the damping ring clearance fit, worm gear 3 Under driven, 4 active state of screw rod, screw rod 4 transmits torque to transmission torsional spring 35 and matches transmitting torsional spring with the damping ring interference It closes.It is very low in cost using the mating reaction of transmission torsional spring 35 and damping ring, while transmission torsional spring 35, damping ring are matched It closes, it is small in size for traditional shaft coupling, it is low to the internal space requirements of linear actuators.

As shown in Figures 9 to 11, in the present embodiment, the shaft coupling specific structure of this monodirectional locking is as follows:

The shaft coupling includes circumferentially spaced first plectrum 36, the second plectrum 37, and the first plectrum 36 is used for and snail 3 connection of wheel, the second plectrum 37 are used to be sequentially connected with screw rod 4, and in the present embodiment, the second plectrum 37 is connected with sun gear 11 It connects, is sequentially connected to realize indirectly with screw rod 4, transmission torsional spring 35 is sleeved on the first plectrum 36 and the second plectrum 37, is driven Torsional spring 35 includes bending pin 35a, and the bending pin 35a is installed between the first plectrum 36 and the second plectrum 37.

In the present embodiment, transmission torsional spring 35 is sleeved on outside the first plectrum 36 and the second plectrum 37, and the damping ring set exists Outside transmission torsional spring 35, the bending pin 35a radial inward bending of transmission torsional spring 35, the first plectrum 36 is transmitted to transmission torsional spring 35 and is turned round When square, the bending pin 35a screws direction towards transmission torsional spring 35 and is struck.

When transmission torsional spring 35 is stirred by different directions, it may occur that two states, one is shrinkage directions, and one is the sides of extending out To, when the first plectrum 36 drives transmission torsional spring 35, radial contraction can occur for transmission torsional spring 35, so that transmission torsional spring 35 Gap between peripheral side and damping ring becomes larger, and is regarded as no friction between transmission torsional spring 35 and damping ring at this time, at this time shape State transmission torsional spring 35 holds the first plectrum 36 tightly, the second plectrum 37 rotates simultaneously, and sun gear can normally be driven by being equivalent to worm gear 3 11 rotations.

Conversely, i.e. the first plectrum 36 is that passively, the second plectrum 37 is active when transmission torsional spring 35 is reversed and stirs, this When the second plectrum 37 to transmission torsional spring 35 transmit torque when, the direction that unscrews of the bending pin 35a towards transmission torsional spring 35 is dialled Dynamic, transmission torsional spring 35 can occur radial direction and extend out, and be interference fitted between the transmission torsional spring 35 and damping ring after radial extend out occurs, from And damping is generated, damping ring can prevent transmission torsional spring 35 from continuing to rotate at this time, and the second plectrum can be prevented by being also equivalent to damping ring 37 continue to rotate.

In other words, it when worm gear 3 is as main driving, can be rotated with normal driving screw rod 4, when screw rod 4 is used as main driving When, when being equivalent to sun gear 11 as driving, worm gear 3 can not be driven to rotate.It can be only done single-direction transmission.

In order to which the first plectrum 36 and the second plectrum 37 can preferably be matched with transmission torsional spring 35,3 center of worm gear is set There is centre bore 3a, first plectrum 36 is along the first arc-like sheet that centre bore is circumferential to be set, and second plectrum 37 is the sun Along axial raised second arc-like sheet on gear 11, simultaneously because the cooperation of the first arc-like sheet and the second arc-like sheet is in worm gear 3 Centre bore 3a position, be equivalent to the center that shaft coupling part is located at worm gear 3, axial position is Chong Die with worm gear 3, reduces whole knot The axial length of structure.

It should be noted that the internal diameter of the first arc-like sheet is less than the internal diameter of centre bore 3a in the present embodiment, when sun tooth When wheel 11 partially passes through centre bore 3a, the end face of sun gear 11 can be kept out by the first arc-like sheet, and the first arc-like sheet is at this time The effect for above assisting baffle is acted as, is equivalent to, worm gear 3 is the to the auxiliary baffle of sun gear 11 in the present embodiment One arc-like sheet.

In assembling, second arc-like sheet, which passes through the centre bore and forms notched circle with the first arc-like sheet, to be enclosed Wall, 35 sets of transmission torsional spring outside the circle wall, the bending pin 35a of transmission torsional spring 35 is installed in notch.This implementation More stable in order to transmit in example, the both ends of transmission torsional spring 35 are respectively equipped with bending pin 35a, are equivalent to transmission torsional spring 35 and have Two bending pin 35a, and the first arc-like sheet and the second arc-like sheet just form two notches in assembling, two bendings are drawn Foot 35a can be just installed in two notches.

In the present embodiment, damping ring is preferably the collar wall 30 on support base 26, and transmission torsional spring 35 is to be sleeved on collar wall In 30, in this way, additional designs damping ring can be saved, collar wall 30 quite in this present embodiment has two effects, outside All side walls can be used for positioning suit worm gear 3, and inner circumferential side wall can be used for generating damping action with transmission torsional spring 35, such It is less to design components, more compact structure, while being also convenient for assembling.

Embodiment three

The difference between the present embodiment and the second embodiment lies in that the coupler structure of the monodirectional locking between worm screw and screw rod is Difference, in the present embodiment, the transmission torsional spring is sleeved in the first plectrum and the second plectrum, and the damping ring is to cover to turn round in transmission In spring, in other words, damping ring is located at most inner side, and the first plectrum, the second plectrum are located at outermost, and transmission torsional spring is located at damping ring Between first plectrum, the second plectrum.

The bending pin of transmission torsional spring in the present embodiment is radially bending, and the first plectrum is transmitted to transmission torsional spring and turned round When square, the bending pin unscrews direction towards transmission torsional spring and is struck, and when the second plectrum transmits torque to transmission torsional spring, institute It states bending pin and screws direction towards transmission torsional spring and be struck, working principle is as follows:

When the first plectrum is as driving, transmission torsional spring occurs radial direction and extends out, at this time the inside of transmission torsional spring and damping ring Outside between gap become larger, therefore be believed that frictional force between transmission torsional spring and damping ring becomes smaller, transmission torsional spring at this time It is free to rotate, so that transmission torsional spring can drive the first plectrum, the second plectrum to rotate together；

And when the second plectrum is as driving, radial contraction occurs for torsional spring, at this time the inside of transmission torsional spring and damping ring it Between be interference fitted, therefore be believed that damping ring prevent transmission torsional spring rotate, the second plectrum is prevented from rotating at this time.

By this embodiment in this present embodiment, need to be separately provided a damping ring, damping ring on support base Preferably it is located between center pillar and collar wall.

The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (10)

1. a kind of switching device of quick release mechanism, the quick release mechanism are mounted in linear actuators, described quick Relieving mechanism includes rotation brake part, and quick release mechanism is by the rotation of control rotation brake part to control at linear actuators In release conditions or lockup state, the switching device is for rotation brake part described in locking and unlocking, it is characterised in that: described Switching device include pedestal, puller, middle part rotating bracket hingedly on the base and can with the grafting of rotation brake part to prevent The positioning pin of spin-ended transformation of ownership moving part rotation, described rotating bracket one end and positioning pin connection, the other end are pulled by puller, are being drawn Under dynamic device pulling function, the rotating bracket rotates so that positioning pin is detached from rotation brake part, the rotating bracket tension Dynamic clamping head and quiet clamping head is provided between one end and pedestal of dynamic device pulling.

2. a kind of switching device of quick release mechanism according to claim 1, it is characterised in that: the rotating bracket packet The rotating bar for including the hinge bar hinged with pedestal and rotating with hinge bar is provided with locating shaft, the elasticity in the rotating bar Return unit is socketed on locating shaft.

3. a kind of switching device of quick release mechanism according to claim 2, it is characterised in that: be arranged on the pedestal There is the through-hole passed through for positioning pin, the end that the rotating bar is connected with positioning pin is provided with the avoid holes for positioning pin sliding.

4. a kind of switching device of quick release mechanism according to claim 3, it is characterised in that: the positioning pin includes Pin shaft, one end of rotation brake part towards the pin shaft are provided with positioning protrusion, and the pin shaft is towards one end of rotation brake part It is provided with the groove with positioning protrusion cooperation.

5. a kind of switching device of quick release mechanism according to claim 4, it is characterised in that: the positioning pin also wraps The retention bead and locating part for preventing pin shaft to be detached from rotating bar are included, retention bead and locating part are located at the two sides of rotating bar, The locating part is screw, and screw is connected to one end that pin shaft passes through avoid holes, and being equipped on the screw prevents screw to be detached from The gasket of avoid holes, the gasket are located between the head and rotating bar of screw.

6. a kind of switching device of quick release mechanism according to claim 4, it is characterised in that: the avoid holes are waist Shape hole is provided with the limiting slot for preventing pin shaft from rotating in avoid holes, the slot bottom of limiting slot and the side of kidney slot on the pin shaft Wall offsets.

7. a kind of switching device of quick release mechanism according to claim 1, it is characterised in that: the puller includes The sliding block being slidably installed on the base is connected with the sliding with sliding block on sliding block and presses the pressing plate of rotating bracket, the pressing plate Free end to pedestal direction tilt.

8. a kind of switching device of quick release mechanism according to claim 7, it is characterised in that: be arranged on the sliding block There is sliding slot, sliding rail is provided on the pedestal, the sliding slot and sliding rail cooperation fall off to prevent limited slip block from sliding rail.

9. a kind of switching device of quick release mechanism according to claim 7 or 8, it is characterised in that: the pedestal packet The baffle for being connected to extreme is included, the puller further includes the drag-line being connected across baffle with sliding block, is socketed on drag-line The both ends of reset spring, the reset spring offset with sliding block and baffle respectively.

10. a kind of linear actuators, including geared worm, worm gear, screw rod, nut, geared worm drives worm gear rotation, and worm gear turns Dynamic to drive screw rod rotation, screw rod rotation drives nut axial movement, relieving mechanism is equipped between worm gear and screw rod, and feature exists In, the quick release mechanism include planetary gear set, planetary gear set include ring gear, sun gear, planetary gear, Planet carrier, sun gear and the worm gear rotate synchronously, and planet carrier and screw rod rotate synchronously, and quick release mechanism further includes being used for To the rotation brake part of ring gear braking, the rotation brake part is driven by switching device described in one of claim 1 to 9 It is dynamic.