CN112713709A - Quick release push rod that transmission efficiency is high - Google Patents

Abstract

The invention provides a quick release push rod with high transmission efficiency, and belongs to the field of quick release push rods. The quick release push rod comprises a gear box, a worm wheel, a left connecting piece, a right connecting piece, a clutch sleeve and a screw rod, wherein the left connecting piece is connected with the screw rod, the right connecting piece is relatively fixed with the worm wheel, the clutch sleeve and the right connecting piece keep axial relative motion and circumferential relative fixation, the clutch sleeve moves axially to be combined with or separated from the left connecting piece, the clutch sleeve and the left connecting piece keep axial relative motion and circumferential relative fixation when combined, a friction plate is arranged on the gear box, and when the quick release push rod bears static load, the right connecting piece and the friction plate are matched to realize self-locking.

Description

Quick release push rod that transmission efficiency is high

[ technical field ] A method for producing a semiconductor device

The invention relates to a quick release push rod with high transmission efficiency, and belongs to the field of quick release push rods.

[ background of the invention ]

The quick release push rod is an electric push rod capable of realizing quick release, generally, a clutch sleeve is arranged between a gear assembly and a screw rod, when the clutch sleeve is simultaneously connected with the gear assembly and the screw rod, the gear assembly and the screw rod can transmit, when the clutch sleeve moves to separate from the screw rod, the gear assembly and the screw rod are relatively separated and cannot transmit, the screw rod does not have the obstruction of the gear assembly and can realize quick release, in order to enable the quick release push rod to be self-locked, a torsional spring is usually required to be arranged outside the clutch sleeve or the gear assembly for self-locking.

However, when the torsion spring is used for self-locking, when the push rod retracts under no load or low load, the interference magnitude is not changed when the torsion spring is installed, so that the clutch sleeve or the gear assembly still can be abraded greatly with the torsion spring, and the push rod is inconvenient to retract.

[ summary of the invention ]

The invention aims to solve the technical problem of providing a quick release push rod with high transmission efficiency, so that the push rod is more convenient to retract.

In order to solve the technical problem, the quick release push rod with high transmission efficiency comprises a gear box, a worm wheel, a left connecting piece, a right connecting piece, a clutch sleeve and a screw rod, wherein the left connecting piece is connected with the screw rod, the right connecting piece is relatively fixed with the worm wheel, the clutch sleeve and the right connecting piece keep axial relative motion and circumferential relative fixation, the clutch sleeve moves axially to be combined with or separated from the left connecting piece, the clutch sleeve keeps axial relative motion and circumferential relative fixation when combined with the left connecting piece, a friction plate is arranged on the gear box, and when the quick release push rod bears static load, the right connecting piece is matched with the friction plate to realize self locking.

Preferably, the right connecting piece includes connecting seat, torsion spring seat and torsional spring, the connecting seat with the worm wheel relatively fixed, the torsion spring cover is established the connecting seat with the torsion spring seat is outside, the torsion spring seat with the friction disc cooperation is in order to realize the auto-lock.

Preferably, a tail pad and a tail pad bearing used for bearing an axial load are arranged on the screw rod, the tail pad is fixed relative to the screw rod, an inner ring of the tail pad bearing is connected with the tail pad, and an outer ring of the tail pad bearing is connected with the torsion spring seat.

Preferably, one end of the tail gasket abuts against the connecting seat.

Preferably, the tail pad bearing is a thrust ball bearing.

Preferably, the screw rod is nested in the connecting seat, and a rolling bearing is arranged between the screw rod and the connecting seat.

Preferably, the screw rod is nested in the connecting seat, a rolling part is arranged in the connecting seat, and the surface of the screw rod is in rolling fit with the rolling part.

Preferably, a stabilizing bearing for positioning the connecting seat is arranged between the connecting seat and the gear box.

Preferably, both sides of the clutch sleeve along the axial direction are respectively in spline fit with the left connecting piece and the right connecting piece.

Preferably, the quick release push rod further comprises a pull rod mechanism for controlling the clutch sleeve to axially slide.

The invention has the beneficial effects that:

firstly, when the electric push rod extends out and retracts normally, the left connecting piece is connected with the right connecting piece through the clutch sleeve for transmission, so that the lead screw can be driven to rotate to realize normal extension and retraction, when the electric push rod is released quickly, the clutch sleeve slides axially to be connected with and separated from the left connecting piece, so that the right connecting piece is separated from the left connecting piece, the lead screw can rotate freely to realize quick release, secondly, when the electric push rod bears static load, self-locking can be realized through friction force between the right connecting piece and the friction plate, when the static load refers to that when the push rod extends out, and is in a static state to support the load, the load reacts on the push rod, and at the moment, the push.

When the load applies acting force to the push rod, the acting force can be converted into axial pressure and circumferential rotating torque through the screw rod, compared with the prior art that self-locking is performed by adopting a torsion spring, when self-locking is performed by adopting the friction plate in the scheme, the friction force between the right connecting piece and the friction plate is in direct proportion to the size of the load, so that when the push rod retracts under no load or low load, because the force applied to the push rod by the load is smaller, the axial pressure of the right connecting piece to the friction plate is also smaller, the friction force between the right connecting piece and the friction plate can be reduced, the push rod retracts more conveniently, the abrasion of the friction plate is reduced, meanwhile, the rotating torque of the load to the screw rod is also in direct proportion to the size of the load, the rotating torque between the right connecting piece and the friction plate can also be reduced, further, the rotating torque is smaller than the friction force to ensure that the push rod, the feasible degree of wear that can reduce the friction disc, the life of friction disc is improved, furthermore, when the push rod retracts, frictional force when needing the motor reversal to overcome the auto-lock, can be because the required energy consumption of frictional force is great to lead to the motor to overcome because the frictional force between separation and reunion cover or gear assembly and the torsional spring is great when adopting the torsional spring auto-lock, and adopt above-mentioned scheme, the push rod is when no-load or low load retract, frictional force between right side connecting piece and the friction disc is less, the motor only need overcome less frictional force and can realize the retraction, make and to reduce the motor energy consumption, and then adopt above-mentioned scheme can improve the transmission efficiency of push rod.

In addition, among the above-mentioned scheme, friction disc and right connecting piece looks mutual friction carry out the auto-lock, make the push rod when quick release, through separation and reunion cover and left connecting piece separation, make lead screw and right connecting piece separation, thereby make the lead screw need not overcome the frictional force between right connecting piece and the friction disc when rotating, and then make the free rotation degree of lead screw higher, the auto-lock ability is stronger not, thereby resistance when can reducing the push rod quick release, it is more convenient to make the push rod quick release, and release rate is faster, convenient to use person uses.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention is described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic view of a quick release push rod according to an embodiment;

FIG. 2 is a schematic view of the interior of a quick release push rod gearbox according to an embodiment;

FIG. 3 is an enlarged schematic view of FIG. 1 at A;

FIG. 4 is an enlarged schematic view of FIG. 1 at B;

FIG. 5 is an exploded view of a quick release push rod according to an embodiment;

FIG. 6 is a schematic view of an embodiment of a quick release push rod with the gearbox removed.

Reference numerals:

1 inner tube, 2 outer tubes, 3 lead screws, 4 release cables, 5 nuts, 6 gear boxes, 7 deflector rod seats, 8 lead screw bearings, 9 release pull rods, 10 left connecting pieces, 11 rolling bodies, 12 clutch sleeves, 13 deflector rods, 14 compression springs, 15 deflector rods, 16 pull rod springs, 17 worm wheels, 18 connecting seats, 19 stabilizing bearings, 20 torsion springs, 21 tail pads, 22 tail pad bearings, 23 torsion spring seats, 24 friction plates, 25 tail pull, 26 motors, 27 motor shells and 28 rolling bearings.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc., which indicate orientations or positional relationships, are used to indicate orientations or positional relationships based on the drawings, and are only used for convenience in describing embodiments and for simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

The first embodiment is as follows:

as shown in fig. 1 to 6, a preferred structure of the fast release push rod with high transmission efficiency in this embodiment includes a gear box 6, a worm wheel 17, a left connecting member 10, a right connecting member, a clutch sleeve 12 and a lead screw 3, where the left connecting member 10 is connected to the lead screw 3, the right connecting member is relatively fixed to the worm wheel 17, the clutch sleeve 12 and the right connecting member keep axial relative motion and circumferential relative fixation, the clutch sleeve 12 moves axially to be combined with or separated from the left connecting member 10, the clutch sleeve 12 keeps axial relative motion and circumferential relative fixation when combined with the left connecting member 10, a friction plate 24 is arranged on the gear box 6, and when the fast release push rod bears a static load, the right connecting member is matched with the friction plate 24 to realize self-locking.

The invention has the beneficial effects that:

firstly, when the electric push rod extends out and retracts normally, the left connecting piece 10 is connected with the right connecting piece through the clutch sleeve 12 for transmission, so that the lead screw 3 can be driven to rotate to realize normal extension and retraction, when the electric push rod is released quickly, the clutch sleeve 12 slides axially to be separated from the left connecting piece, so that the right connecting piece is separated from the left connecting piece 10, the lead screw 3 can rotate freely to realize quick release, secondly, when the electric push rod bears static load, self-locking can be realized through the friction force between the right connecting piece and the friction plate 24, when the static load refers to that after the push rod extends out, when the load is supported in the static state, the reaction force of the load on the push rod needs to be self-locked to support.

When acting force is applied to the push rod by a load, the axial pressure and the circumferential rotating torque can be converted through the screw rod 3, compared with the prior art that the torsion spring 20 is adopted for self-locking, when the friction plate 24 is adopted for self-locking in the scheme, the friction force between the right connecting piece and the friction plate 24 is in direct proportion to the size of the load, so that when the push rod retracts in no-load or low-load, because the force applied to the push rod by the load is smaller, the axial pressure of the right connecting piece to the friction plate 24 is also smaller, the friction force between the right connecting piece and the friction plate 24 can be reduced, the push rod retracts more conveniently, the abrasion of the friction plate 24 is reduced, meanwhile, the rotating torque of the load to the screw rod 3 is also in direct proportion to the size of the load, the rotating torque between the right connecting piece and the friction plate 24 can also be reduced, and the rotating moment and the friction rotating speed of the right connecting piece to the friction plate 24 can be reduced when the push rod retracts, so that the abrasion degree of the friction plate 24 can be reduced, the service life of the friction plate 24 is prolonged, in addition, when the push rod retracts, the motor 26 needs to rotate reversely to overcome the friction force during self-locking, when the torsion spring 20 is adopted for self-locking, the friction force between the clutch sleeve 12 or the gear assembly and the torsion spring 20 is large, so that the energy consumption required by the motor 26 to overcome the friction force is large, and by adopting the scheme, when the push rod retracts in no load or low load, the friction force between the right connecting piece and the friction plate 24 is small, the motor 26 can retract only by overcoming the small friction force, so that the energy consumption of the motor 26 can be reduced, and further.

Furthermore, among the above-mentioned scheme, friction disc 24 and right connecting piece looks mutual friction carry out the auto-lock, make the push rod when quick release, through separation and reunion cover 12 and the separation of left connecting piece 10, make lead screw 3 and the separation of right connecting piece, thereby make lead screw 3 need not overcome the frictional force between right connecting piece and the friction disc 24 when rotating, and then make lead screw 3's free rotation degree higher, the auto-lock ability is stronger not, thereby resistance when can reducing the quick release of push rod, it is more convenient to make the quick release of push rod, and release rate is faster, convenient to use person uses.

When the push rod extends out, the motor 26 drives the worm wheel 17 to rotate, the worm wheel 17 drives the right connecting piece to rotate, the right connecting piece drives the left connecting piece 10 to rotate through the clutch sleeve 12, the left connecting piece 10 drives the lead screw 3 to rotate when rotating, the lead screw 3 drives the nut 5 to move, the nut 5 is connected with the inner tube 1 to drive the inner tube 1 to move and extend relative to the outer tube 2, and therefore the push rod extends out.

When the push rod is static after stretching out to support a load, the motor 26 does not rotate, the load extrudes the inner tube 1, the inner tube 1 transmits the acting force of the load to the screw rod 3 through the nut 5 and respectively converts the acting force into a force along the axis direction of the screw rod 3 and a rotating torque along the circumference direction of the screw rod 3, the axial force and the rotating torque on the screw rod 3 are transmitted to the right connecting piece through the left connecting piece 10 and the clutch sleeve 12, the right connecting piece extrudes the friction plate 24 and has a rotating trend relative to the friction plate 24, and the rotating torque is smaller than the friction force between the right connecting pieces at the moment, so that the push.

When the push rod retracts, the motor 26 rotates reversely to drive the worm wheel 17 to rotate reversely, the worm wheel 17 drives the screw rod 3 to rotate reversely through the right connecting piece, the clutch sleeve 12 and the left connecting piece 10, and the screw rod 3 drives the nut 5 to retract when rotating reversely, so that the inner tube 1 is driven to retract.

When the push rod is released quickly, the push rod is in an extending state, the motor 26 is not moved, a user pulls the release cable 4, the release cable 4 is connected with the release pull rod 9 to drive the release pull rod 9 to move, a toggle slider 13 is fixed on the release pull rod 9 to drive a wave slider to move, the toggle slider 13 is connected with a toggle rod 15 to drive a toggle rod 15 to move, the toggle rod 15 is rotatably connected with a toggle rod 15 seat 7, the toggle rod 15 seat 7 is fixed relative to the gear box 6, the toggle rod 15 rotates relative to the toggle rod 15 seat 7 to toggle a clutch sleeve 12 to move, so that the clutch sleeve 12 is separated relative to a left connecting piece 10, at the moment, the screw rod 3 is in a free rotating state because of no clutch sleeve 12 is positioned, can directly rotate under the action of load or external force to drive the inner tube 1 to retract so as to realize quick release, when the inner, the release pull rod 9 is reset under the action of a pull rod spring 16 and drives the pull rod to reset, and the clutch sleeve 12 is reset under the action of a compression spring 14 and is connected with the left connection again.

In addition, the friction plate 24 can be directly connected with the tail pull 25, so that the axial force of the screw rod 3 can be applied to the tail pull 25, the screw rod bearing 8 can be arranged on the screw rod 3 to enable the screw rod 3 to move more stably, and a motor shell 27 is arranged outside the motor 26 for packaging.

In order to make the extension of the push rod more convenient, in this embodiment, it is preferable that the right connecting member includes a connecting seat 18, a torsion spring seat 23 and a torsion spring 20, the connecting seat 18 and the worm wheel 17 are relatively fixed, the torsion spring 20 is sleeved outside the connecting seat 18 and the torsion spring seat 23, the torsion spring seat 23 is matched with the friction plate 24 to realize self-locking, by adopting such a structure, when the push rod extends, the worm wheel 17 drives the connecting seat 18 to rotate, the connecting seat 18 drives the torsion spring 20 to loosen when rotating, so that the connecting seat 18 is not circumferentially positioned with the torsion spring seat 23, the connecting seat 18 does not need to drive the torsion spring seat 23 to rotate, the connecting seat 18 is connected with the clutch sleeve 12 to perform transmission, so that the push rod can extend without overcoming the friction force between the torsion spring seat 23 and the friction plate 24 when extending, thereby making the extension of the push rod more convenient, and when the push rod is self-locked and retracted, the connecting seat 18 rotates, the connecting seat 18 is connected with the torsion spring seat 23, and is self-locked through the friction force between the torsion spring seat 23 and the friction plate 24 or is retracted by overcoming the friction force between the torsion spring seat 23 and the friction plate 24.

In order to make the lead screw 3 more stable, this embodiment is preferred be equipped with the tail-pad 21 on the lead screw 3 and be used for bearing axial load's tail-pad bearing 22, the tail-pad 21 for the lead screw 3 is fixed, the inner circle of tail-pad bearing 22 with the tail-pad 21 links to each other, the outer lane of tail-pad bearing 22 with torsion spring seat 23 links to each other, lead screw 3 passes through tail-pad 21 and tail-pad bearing 22 can contact with torsion spring seat 23 for lead screw 3 is close to tail-pull 25's one end and can be fixed a position through tail-pad 21, tail-pad bearing 22 and torsion spring seat 23, makes lead screw 3 more stable, the axiality is higher, secondly, can directly transmit torsion spring seat 23 through tail-pad 21 and bearing when lead screw 3 receives load axial pressure, prevent that axial force on the lead screw 3 from when left connecting piece 10, separation and reunion cover 12, connecting seat 18 and torsion spring 20 transmit torsion spring seat 23, because reasons, There will be installation clearance and error between separation and reunion cover 12, connecting seat 18 and the torsional spring seat 23, and then lead to axial force to reduce easily when a plurality of parts transmit, influence the auto-lock ability of push rod, and tail pad bearing 22 adopts the bearing that has good bearing axial load ability.

In order to make the connecting seat 18 more stable, in this embodiment, one end of the tail pad 21 is preferably abutted against the connecting seat 18, and usually, the screw rod 3 is inserted into the connecting seat 18 and a gap is provided between the connecting seat 18 and the screw rod 3 to ensure that the connecting seat 18 does not drive the screw rod 3 to rotate, at this time, one side of the connecting seat 18 can be positioned by the clutch sleeve 12, and the other side can be positioned by the tail gasket 21, so that the connecting seat 18 is more stable, and simultaneously, the tail gasket 21 is more stable, and in addition, when the push rod extends out, the connecting seat 18 and the screw rod 3 synchronously rotate, namely, the tail gasket 21 rotates synchronously, so that when the screw rod 3 extends out, the tail gasket 21 can not influence the rotation of the connecting seat 18, when the push rod bears load, the tail gasket 21 can also transmit the axial force borne by the connecting seat 18 to the torsion spring seat 23 through the bearing, so that the friction force between the torsion spring seat 23 and the friction plate 24 is increased, and the self-locking capacity of the push rod is improved.

In order to optimize the bearing, in this embodiment, it is preferable that the tail gasket bearing 22 is a thrust ball bearing for bearing an axial load, the thrust ball bearing has a good axial load bearing capability, and by providing the thrust ball bearing, the tail gasket bearing 22 can bear a good axial force.

In order to make the connecting seat 18 more stable, in this embodiment, it is preferable that the lead screw 3 is nested in the connecting seat 18, a rolling bearing 28 is disposed between the lead screw 3 and the connecting seat 18, an inner ring of the rolling bearing 28 is connected with the lead screw 3, an outer ring of the rolling bearing 28 is connected with the connecting seat 18, the lead screw 3 and the connecting seat 18 can be relatively positioned through the rolling bearing 28, meanwhile, the connecting seat 18 can not drive the lead screw 3 to rotate when rotating, so that the lead screw 3 can freely rotate when being rapidly released, and when the lead screw 3 is subjected to an axial force, the lead screw 3 can axially shift relative to the rolling bearing 28 or shift relative to the connecting seat 18 through the rolling bearing.

In order to position connecting seat 18 more stably, in this embodiment, it is preferable that stabilizing bearing 19 for positioning connecting seat 18 is disposed between connecting seat 18 and gear box 6, an inner ring of stabilizing bearing 19 is connected to connecting seat 18, and an outer ring of stabilizing bearing is connected to gear box 6, so that connecting seat 18 can be supported by gear box 6, and connecting seat 18 is positioned more stably.

In order to enable the clutch sleeve 12 to axially slide and circumferentially position with the left connecting member 10 and the right connecting member, in this embodiment, it is preferable that both sides of the clutch sleeve 12 along the axial direction thereof are respectively in spline fit with the left connecting member 10 and the right connecting member, through the spline fit, the clutch sleeve 12 can axially slide and circumferentially position with the left connecting member 10 and the right connecting member, and meanwhile, the rolling element 11 can be used between the left connecting member 10 and the right connecting member for rolling matching, so that the friction force is smaller when the clutch sleeve 12 axially slides.

In order to allow a user to toggle the clutch sleeve 12 outside the push rod, in this embodiment, it is preferable that the quick release push rod further includes a pull rod mechanism for controlling the clutch sleeve 12 to slide axially, the pull rod mechanism includes a release cable 4, a release pull rod 9, a toggle slider 13, a shift rod 15, a pull rod spring 16 and a shift rod 15 seat 7, the user pulls the release cable 4, the release cable 4 is connected to the release pull rod 9 to drive the release pull rod 9 to move, the release pull rod 9 drives the shift rod 15 to move through the toggle slider 13, the shift rod 15 is rotatably connected to the shift rod 15 seat 7, the shift rod 15 seat 7 is fixed relative to the gear box 6, the shift rod 15 rotates relative to the shift rod 15 seat 7 to toggle the clutch sleeve 12 to move, so that the.

Example two:

the difference between this embodiment and the first embodiment is that, in this embodiment, the screw rod 3 is nested in the connecting seat 18, a rolling member is disposed in the connecting seat 18, and a surface of the screw rod 3 is in rolling fit with the rolling member, wherein the rolling member may be a rolling member such as a ball, a cylinder, a cone, or the like, and in this embodiment, the rolling member is preferably a ball, in this way, the screw rod 3 may be in contact with the connecting seat 18 through the ball to achieve mutual positioning, and may also axially slide relative to the connecting seat 18 so that an axial force applied to the screw rod may be transmitted to the torsion spring seat 23, and this embodiment may also achieve the technical effects described in the first embodiment.

While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (10)

1. The utility model provides a quick release push rod that transmission efficiency is high, includes gear box, worm wheel, left connecting piece, right connecting piece, separation and reunion cover and lead screw, left side connecting piece with the lead screw links to each other, right connecting piece with the worm wheel is relatively fixed, separation and reunion cover with right connecting piece keeps axial relative motion and circumference relatively fixed, separation and reunion cover axial displacement with left connecting piece combines or separates, separation and reunion cover with left connecting piece combines to keep axial relative motion and circumference relatively fixed, its characterized in that: the gear box is provided with a friction plate, and when the quick release push rod bears static load, the right connecting piece is matched with the friction plate to realize self-locking.

2. A high drive efficiency quick release push rod as claimed in claim 1, wherein: the right connecting piece comprises a connecting seat, a torsion spring seat and a torsion spring, the connecting seat is relatively fixed to the worm wheel, the torsion spring sleeve is arranged on the connecting seat and outside the torsion spring seat, and the torsion spring seat is matched with the friction plate to realize self-locking.

3. A high drive efficiency quick release push rod as claimed in claim 2, wherein: the screw rod is provided with a tail pad and a tail pad bearing used for bearing axial load, the tail pad is fixed relative to the screw rod, the inner ring of the tail pad bearing is connected with the tail pad, and the outer ring of the tail pad bearing is connected with the torsion spring seat.

4. A high drive efficiency quick release push rod as claimed in claim 3, wherein: one end of the tail pad is abutted to the connecting seat.

5. A high drive efficiency quick release push rod as claimed in claim 3, wherein: the tail gasket bearing is a thrust ball bearing.

6. A high drive efficiency quick release push rod as claimed in claim 2, wherein: the lead screw is nested in the connecting seat, and a rolling bearing is arranged between the lead screw and the connecting seat.

7. A high drive efficiency quick release push rod as claimed in claim 2, wherein: the screw rod is nested in the connecting seat, a rolling part is arranged in the connecting seat, and the surface of the screw rod is in rolling fit with the rolling part.

8. A high drive efficiency quick release push rod as claimed in claim 2, wherein: and a stabilizing bearing used for positioning the connecting seat is arranged between the connecting seat and the gear box.

9. A drive efficient quick release push rod as claimed in any one of claims 1 to 8, wherein: and the two sides of the clutch sleeve along the axis direction are respectively matched with the left connecting piece and the right connecting piece by adopting splines.

10. A drive efficient quick release push rod as claimed in any one of claims 1 to 8, wherein: the quick release push rod further comprises a pull rod mechanism used for controlling the clutch sleeve to axially slide.

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