CN211924832U

CN211924832U - Torque transmission silencing structure for electric push rod

Info

Publication number: CN211924832U
Application number: CN201922302211.1U
Authority: CN
Inventors: 何全胜
Original assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Current assignee: Zhejiang Jiecang Linear Motion Technology Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-11-13
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a torque transmission silencing structure for an electric push rod, which belongs to the technical field of mechanical device transmission, the electric push rod comprises a driving motor, a guide sleeve fixedly connected with the driving motor, a screw rod component rotating under the driving of the driving motor, a nut sleeved on the screw rod component and moving along the axial direction of the screw rod component, and a push rod connected on the nut and extending in the guide sleeve along with the movement of the nut, a worm wheel is sleeved on the screw rod component, the worm wheel and an output shaft of the driving motor form a worm wheel and worm rod transmission connecting structure, the worm wheel is sleeved with the screw rod component in a circumferential positioning way, a first filling groove is arranged between the screw rod component and the worm wheel, a filler is filled in the first filling groove, the worm wheel and the screw rod component are convenient to assemble by adopting the structure, the assembly difficulty is reduced, the requirement on the processing precision of the component is reduced, the production and assembly cost are saved, and, the use comfort of the electric push rod is improved, and the service life is prolonged.

Description

Torque transmission silencing structure for electric push rod

[ technical field ] A method for producing a semiconductor device

The utility model relates to a mechanical device transmission technical field, concretely relates to moment of torsion transmission amortization structure for electric putter.

[ background of the invention ]

An electric push rod, also known as a linear driver, is an electric drive device for converting the rotary motion of a motor into the linear reciprocating motion of the push rod, the electric push rod comprises a drive motor, a screw rod, a nut, a guide sleeve, a push rod, a worm gear and the like, wherein the push rod is connected to the nut, the nut is sheathed on the screw rod by screw threads, the worm gear is sheathed at one end of the screw rod close to the drive motor, the output end of the drive motor and the worm gear form a worm and gear transmission mechanism, the working principle of the electric push rod drive mechanism is that the drive motor rotates, the worm gear is driven to rotate by the worm and gear transmission mechanism to drive the screw rod to rotate, the nut moves along the axial direction of the screw rod to realize the extension and retraction of the push rod, in the process that the worm gear drives the screw rod to rotate, the hole torque generated by the rotation of the worm gear is, and the requirement for the processing precision of parts is very high, the production degree of difficulty and cost are improved, for the convenience of assembly, and reduce the processing degree of difficulty, there is the producer to adopt clearance fit between with worm wheel and the lead screw, but because the existence in clearance, the moment of torsion has certain loss from the in-process that the worm wheel transmitted the lead screw, the moment of torsion transmission effective rate has been reduced, and can have the abnormal sound in the rotation process, be difficult to satisfy furniture household electrical appliances silence demand, influence the use impression, collision repeatedly between the part simultaneously, the damage of part has also been accelerated, the replacement cost is increased, electric putter life is reduced.

[ summary of the invention ]

The utility model aims to solve the technical problem that overcome not enough among the prior art, design one kind and save the cost, be convenient for assembly, torque transmission efficient is used for electric putter moment of torsion transmission amortization structure.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a moment of torsion transmission amortization structure for electric putter, electric putter includes driving motor, with driving motor fixed connection's guide pin bushing, the lead screw subassembly of rotating under the driving motor drive, cup joint on the lead screw subassembly and along the nut of lead screw subassembly axial direction removal and connect on the nut along with the nut removal and the push rod that stretches out and draws back in the guide pin bushing, the worm wheel is established to the cover on the lead screw subassembly, the worm wheel constitutes worm gear transmission connection structure with driving motor's output shaft, the worm wheel cup joints with lead screw subassembly circumference location, be equipped with first filling groove between lead screw subassembly and the worm wheel, it has the filler to fill in the first filling groove.

Adopt utility model's beneficial effect:

1. the worm wheel is connected with driving motor's output shaft worm gear transmission in this scheme, and the worm wheel cup joints with lead screw subassembly circumference location, driving motor rotates and drives the lead screw worm wheel and rotate, it rotates to drive the lead screw again, thereby realize the flexible of push rod, can adopt clearance fit between the worm wheel of this scheme and the lead screw subassembly, it makes worm wheel and lead screw subassembly become inseparable whole to fill the filler in clearance fit department again, adopt this structure worm wheel and lead screw subassembly convenient assembling, reduce the assembly degree of difficulty, reduce assembly fixture, reduce to part machining precision requirement, save production and assembly cost.

2. The existence of filler has guaranteed the stability of worm wheel and lead screw subassembly, make the hole moment of torsion that the worm wheel rotated the production transmit to the lead screw effectively on, reduce energy loss, improve whole electric putter's work efficiency, simultaneously, the filler of clearance fit department has avoided the rigid collision of worm wheel and lead screw subassembly, has reduced or eliminated the noise that worm wheel and lead screw subassembly rotated the transmission in-process and produce, improves electric putter comfort in use, reduces replacement cost, increase of service life.

Preferably, the screw rod assembly is in clearance fit with the worm wheel in the circumferential direction and/or the radial direction, the clearance forms a first filling groove, and/or the first filling groove comprises a receiving groove arranged in an inner hole of the worm wheel.

Preferably, the screw rod assembly comprises a screw rod body and a connecting sleeve, and the connecting sleeve is circumferentially positioned and sleeved on the screw rod body or integrally formed with the screw rod body.

Preferably, the connecting sleeve is provided with a plurality of positioning bulges, and the inner hole of the worm wheel is provided with a positioning groove matched with the positioning bulges.

Preferably, when the first filling groove comprises the accommodating groove, the accommodating groove is formed in the axial direction and/or the radial direction of the side wall of the positioning groove, or the accommodating groove is formed in the axial direction and/or the circumferential direction of the bottom wall of the positioning groove, or the accommodating groove is formed in the axial direction and/or the circumferential direction of the inner hole wall of the worm wheel.

Preferably, the connecting sleeve is provided with a first flat position, and the inner hole of the worm wheel is provided with a first flat position hole matched with the first flat position.

Preferably, when the first filling groove comprises a receiving groove, the receiving groove is arranged in the axial direction and/or the circumferential direction of the first flat position hole.

Preferably, when the connecting sleeve is circumferentially positioned and sleeved on the screw rod body, a second flat position is arranged on the screw rod body, and a second flat position hole matched with the second flat position is arranged on the connecting sleeve.

Preferably, a second filling groove is arranged between the second flat position and the second flat position hole, and the second filling groove is filled with fillers.

Preferably, the filler is an abrasion resistant grease or an abrasion resistant elastomer.

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 utility model is further described with the following drawings:

fig. 1 is an exploded view of the electric putter of the present invention.

Fig. 2 is the exploded schematic view of the worm gear and worm transmission connection structure and the torque transmission structure of the present invention.

Fig. 3 is a cross-sectional view of the worm wheel and the lead screw body of the utility model through a sleeve joint structure of the connecting sleeve.

Fig. 4 is the utility model discloses the structure schematic diagram of first holding tank is seted up to the worm wheel hole, wherein first holding tank is seted up in the week of pore wall in the worm wheel.

Fig. 5 is the structure diagram of the first holding tank is provided in the inner hole of the worm wheel, wherein the first holding tank is provided in the axial direction of the side wall of the positioning groove.

Fig. 6 is a cross-sectional view of the worm wheel and the lead screw body of the present invention through another sleeve structure of the coupling sleeve.

Reference numerals: 1. a drive motor; 101. an output shaft; 2. a guide sleeve; 3. a screw assembly; 301. a screw rod body; 302. a coupling sleeve; 302a, a positioning projection; 302b, a second accommodating groove; 4. a nut; 5. a push rod; 6. a worm gear; 601. a positioning groove; 601a, a first accommodating groove; 7. a first gap; 8. a second filling groove; 001. worm gear transmission connection structure.

[ 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 description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the description of a first feature "on" or "under" a second feature may include the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The first embodiment is as follows:

as shown in fig. 1 to 6, a torque transmission noise reduction structure for an electric putter, the electric putter includes a driving motor 1, a guide sleeve 2 fixedly connected with the driving motor 1, a screw assembly 3 rotating under the driving of the driving motor 1, a nut 4 sleeved on the screw assembly 3 and moving along the axial direction of the screw assembly 3, and a putter 5 connected to the nut 4 and extending in the guide sleeve 2 along with the movement of the nut 4, a worm wheel 6 is sleeved on the screw assembly 3, the worm wheel 6 and an output shaft 101 of the driving motor 1 form a worm and gear transmission connection structure 001, the worm wheel 6 is sleeved with the screw assembly 3 in a circumferential positioning manner, a first filling groove is arranged between the screw assembly 3 and the worm wheel 6, and a filler is filled in the first filling groove.

In this embodiment worm wheel 6 is connected with the output shaft 101 worm gear transmission of driving motor 1, and worm wheel 6 cup joints with 3 circumference location of lead screw subassembly, driving motor 1 rotates and drives lead screw worm wheel 6 and rotate, it rotates to drive the lead screw again, thereby realize the flexible of push rod 5, can adopt clearance fit between the worm wheel 6 of this embodiment and the lead screw subassembly 3, fill the filler in clearance fit department again and make worm wheel 6 and lead screw subassembly 3 become inseparable whole, adopt this structure worm wheel 6 and lead screw subassembly 3 convenient assembling, reduce the assembly degree of difficulty, reduce assembly fixture, reduce the requirement to part machining precision, save production and assembly cost. The existence of filler has guaranteed worm wheel 6 and lead screw subassembly 3 stability, make worm wheel 6 rotate the hole moment of torsion that produces transmit to the lead screw effectively on, energy loss is reduced, whole electric putter's work efficiency is improved, and simultaneously, the rigid collision of worm wheel 6 and lead screw subassembly 3 has been avoided to the filler of first clearance 7 cooperation department, the noise that worm wheel 6 and lead screw subassembly 3 rotation transmission in-process produced has been reduced or has been eliminated, electric putter comfort in use is improved, the replacement cost is reduced, and service life is prolonged.

In order to facilitate the assembly of the worm wheel 6 and the lead screw assembly 3, as shown in fig. 3, the lead screw assembly 3 is matched with a first circumferential and/or radial gap 7 of the worm wheel 6, the first gap 7 forms a first filling groove, a filler is filled in the first gap 7, the filler has contact friction with an inner hole of the worm wheel 6 and the outer wall of the lead screw assembly 3 in the first gap 7, the filler in the embodiment is wear-resistant grease or wear-resistant elastomer, the filler is filled in the first gap 7, the stability of the matching assembly is guaranteed, meanwhile, the buffer effect is achieved, hard collision is avoided, meanwhile, the wear-resistant performance of the filler is good, and the service life of the matching assembly is prolonged.

In order to realize the circumferential positioning sleeve connection of the worm wheel 6 and the screw rod assembly 3, in this embodiment, as shown in fig. 3 and 6, the screw rod assembly 3 includes a plurality of positioning protrusions 302a, as shown in fig. 3 to 6, a positioning groove 601 matched with the positioning protrusions 302a is arranged in an inner hole of the worm wheel 6, the worm wheel 6 and the screw rod assembly 3 are circumferentially fixed through the matching of the positioning protrusions 302a and the positioning groove 601, relative rotation cannot occur, the torque of the worm wheel 6 is transmitted to the outer wall of the positioning protrusions 302a through the inner wall of the positioning groove 601, and is transmitted to the screw rod assembly 3, so that the screw rod assembly 3 is driven to rotate.

The lead screw component 3 in the embodiment comprises a lead screw body 301, and in order to reduce the replacement cost, preferably, as shown in fig. 2, fig. 3 and fig. 6, the lead screw component 3 further comprises a coupling sleeve 302 which is circumferentially positioned and sleeved on the lead screw body 301, a positioning protrusion 302a is arranged on the coupling sleeve 302, the coupling sleeve 302 is arranged, the lead screw body 301 is prevented from being damaged due to direct contact with an inner hole of a worm wheel 6, the coupling sleeve 302 is sleeved, the coupling sleeve 302 is convenient to replace after being damaged, and the cost is low.

In order to realize the circumferential positioning sleeve connection of the screw rod body 301 of the connecting sleeve 302 and the connecting sleeve 302, as shown in fig. 3 and fig. 6, a second flat position is arranged on the screw rod body 301, a second flat position hole matched with the second flat position is arranged on the connecting sleeve 302, the second flat position and the second flat position hole are in radial clearance fit, a second filling groove 8 is formed in a clearance, a filler is filled in the second filling groove 8, and the filler is wear-resistant grease or wear-resistant elastomer such as rubber.

It should be noted that there are various embodiments of the circumferential positioning sleeve connection between the coupling sleeve 302 and the lead screw body 301, and in this embodiment, only one circumferential positioning sleeve connection is preferably listed, and in other embodiments, the circumferential positioning sleeve connection is not limited to the structure in this embodiment.

It is understood that the coupling sleeve 302 and the lead screw body 301 can be integrally formed.

Example two:

as shown in fig. 4 to 6, the present embodiment is different from the first embodiment in that the first filling groove includes a first accommodating groove 601a formed in the inner hole of the worm wheel 6, the first accommodating groove 601a is formed in the axial direction of the side wall of the positioning groove 601, at this time, if the filler is a soft elastic body such as rubber, one side of the elastic body is clamped into the first accommodating groove 601a, and the other side is abutted against the side wall of the protrusion, and the worm wheel 6 and the lead screw assembly 3 are repeatedly squeezed and loosened during the rotation transmission process, so that the elastic body will not fall off or shift, and the electric push rod for lifting furniture, medical treatment, and the like is used, because of the requirement such as silence, the worm wheel 6 is made of a plastic material, so the soft elastic body such as rubber is filled, and in other electric push rods, the worm wheel; if the filler is wear-resistant grease, the first accommodating groove 601a is a grease accommodating groove for storing the wear-resistant grease, so that the wear-resistant grease can be continuously supplemented between the worm wheel 6 and the screw rod assembly 3, and in order to reduce waste caused by diffusion of the wear-resistant grease to other positions or influence normal operation of other parts, the first accommodating groove 601a is provided with a side wall and a front wall and a rear wall. Meanwhile, the wear-resistant grease has the functions of lubricating and protecting parts against rust and the like.

It is understood that the first receiving groove 601a may also be opened in a radial direction of the sidewall of the positioning groove 601.

It is understood that the first receiving groove 601a may be opened in the axial direction and/or the circumferential direction of the bottom wall of the positioning groove 601.

It is understood that the first receiving groove 601a may be opened in the axial direction and/or the circumferential direction of the inner hole wall of the worm wheel 6.

It should be noted that, in other embodiments, the arrangement position and structure of the first receiving groove 601a are not limited to the above-mentioned embodiments, and may be provided on the screw rod assembly 3, and the cross section is square, trapezoidal, and the like, as long as the above-mentioned technical effects can be achieved, all falling within the protection scope of the present invention.

As shown in fig. 6, the second filling groove 8 may also include a second receiving groove 302b provided on the second flat hole, in which case the second receiving groove 302b is opened on the second flat hole of the coupling sleeve 302 in the axial or circumferential direction, although the second receiving groove 302b may also be provided on the flat position.

Example three:

the difference between this embodiment and the first and second embodiments is that the worm wheel 6 and the lead screw assembly 3 adopt the flat position and flat position hole fit to replace the fit of the positioning protrusion 302a and the positioning groove 601, at this time, the coupling sleeve 302 is provided with a first flat position, the inner hole of the worm wheel 6 is provided with a first flat position hole matched with the first flat position, when the first filling groove comprises the first accommodating groove 601a, the first accommodating groove 601a at this time is arranged in the axial direction and/or the circumferential direction of the first flat position hole.

It should be noted that, the circumferential positioning cup joint between the worm wheel 6 and the screw rod assembly 3 can have multiple embodiments, the embodiment of the present invention only preferably lists two circumferential positioning cup joint modes, and in other embodiments of the present invention, the present invention is not limited to the structure of the present invention.

The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides a moment of torsion transmission amortization structure for electric putter, electric putter includes driving motor, with driving motor fixed connection's guide pin bushing, the lead screw subassembly of rotating under the driving motor drive, cup joint on the lead screw subassembly and along the nut of lead screw subassembly axial direction removal and connect on the nut along with the nut removal and the push rod of stretching out and drawing back in the guide pin bushing, the worm wheel is established to the cover on the lead screw subassembly, the worm wheel constitutes worm gear transmission connection structure with driving motor's output shaft, its characterized in that, the worm wheel cup joints with lead screw subassembly circumference location, be equipped with first filling groove between lead screw subassembly and the worm wheel, it has the filler to fill in the first filling groove.

2. The torque transmission noise reduction structure for the electric push rod according to claim 1, wherein the screw rod assembly is in circumferential and/or radial clearance fit with the worm wheel, the clearance forms a first filling groove, and/or the first filling groove comprises a receiving groove opened in an inner hole of the worm wheel.

3. The torque transmission noise reduction structure for the electric push rod as claimed in claim 2, wherein the screw rod assembly comprises a screw rod body and a coupling sleeve, the coupling sleeve is circumferentially positioned and sleeved on the screw rod body, or the coupling sleeve and the screw rod body are integrally formed.

4. The torque transmission noise reduction structure for the electric push rod as claimed in claim 3, wherein the coupling sleeve is provided with a plurality of positioning protrusions, and the inner hole of the worm wheel is provided with positioning grooves matched with the positioning protrusions.

5. The torque transmission noise reduction structure for the electric push rod according to claim 4, wherein when the first filling groove includes a receiving groove, the receiving groove is formed in an axial direction and/or a radial direction of a side wall of the positioning groove, or the receiving groove is formed in an axial direction and/or a circumferential direction of a bottom wall of the positioning groove, or the receiving groove is formed in an axial direction and/or a circumferential direction of an inner hole wall of the worm wheel.

6. The torque transmission noise reduction structure for the electric push rod as claimed in claim 3, wherein the coupling sleeve is provided with a first flat position, and the inner hole of the worm wheel is provided with a first flat position hole matched with the first flat position.

7. The torque transmission noise reduction structure for an electric putter as set forth in claim 6, wherein when said first filling groove includes a receiving groove, said receiving groove is opened in an axial direction and/or a circumferential direction of the first flat position hole.

8. The torque transmission noise reduction structure for the electric push rod according to claim 3, wherein when the coupling sleeve is circumferentially positioned and sleeved on the lead screw body, the lead screw body is provided with a second flat position, and the coupling sleeve is provided with a second flat position hole matched with the second flat position.

9. The torque transmission noise reduction structure for the electric putter as claimed in claim 8, wherein a second filling groove is provided between the second flat position and the second flat position hole, and the second filling groove is filled with a filler.

10. The torque transmission noise reduction structure for an electric putter as set forth in any one of claims 1 to 9, wherein said filler is abrasion resistant grease or abrasion resistant elastomer.