CN212909242U

CN212909242U - Motor self-locking structure of lifting door

Info

Publication number: CN212909242U
Application number: CN202021754832.XU
Authority: CN
Inventors: 蒋立科; 阳胜利; 刘军; 吕旭林
Original assignee: Ccl Manufacturjng Shenzhen Ltd
Current assignee: Ccl Manufacturjng Shenzhen Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-04-06
Anticipated expiration: 2030-08-20

Abstract

The utility model is suitable for a motor technical field provides a lift door motor self-locking structure, including motor body, the worm be connected with the motor body drive and with worm meshing's worm wheel. The motor body comprises a rotating shaft connected with the worm, a rotating assembly connected to the rotating shaft and a static assembly supported on the rotating shaft. This elevating door motor self-locking structure still locates the epaxial friction subassembly of commentaries on classics including the cover to be located between runner assembly and the static subassembly, the both ends of friction subassembly are used for respectively with runner assembly and static subassembly butt, block the runner assembly and rotate. The utility model provides a lifting door motor auto-lock structure, thereby the both ends through friction subassembly respectively with runner assembly and static subassembly butt produce static friction, when the runner assembly has the rotation trend, make friction subassembly and runner assembly produce sliding friction or produce sliding friction with static subassembly, in order to block the runner assembly rotation and combine the worm gear auto-lock, the reliability is higher, does not influence appearance and installation.

Description

Motor self-locking structure of lifting door

Technical Field

The utility model belongs to the technical field of the motor, more specifically say, relate to a lift door motor auto-lock structure.

Background

The worm gear has the characteristics of large transmission ratio, stable work, reverse self-locking and the like, and is widely applied to various mechanical transmission devices. When the worm wheel is driven to rotate by external torque, the worm is prevented from rotating due to a certain friction angle between the worm wheel and the worm, so that the worm cannot be driven, and the self-locking is called. At present, a part of driving devices of the lifting door adopt worm gears and worms for transmission, so that the lifting door is lifted, and the lifting door is prevented from falling due to the influence of gravity. The application process is that the motor drives the worm to positively drive the worm gear to lift and put down the lifting door, when the lifting door is lifted to a certain height, the motor stops driving, the lifting door hovers in the air, the lifting door drives the worm gear to reversely drive the worm by the downward gravity of the lifting door, if the worm is successfully reversely driven, the lifting door drops, otherwise, the lifting door hovers at the designated height.

Because the lifting door is required to be limited at any position, a worm wheel and a worm are required to have great self-locking force, but in the theory of worm wheel and worm transmission, a pure worm wheel and worm mechanism has the characteristic of reverse self-locking but cannot realize 100% reliable self-locking, so that the lifting door has the probability of falling in a driving system of the lifting door. Meanwhile, the driving system of the lifting door is small in size, and reliable self-locking of the worm and gear is not easy to achieve in a limited space.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a lifting door motor auto-lock structure to solve the technical problem that current lifting door adopts simple worm gear mechanism can't accomplish reliable auto-lock.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a lift gate motor self-locking structure, including motor body, with the worm that the motor body transmission is connected and with worm gear, its characterized in that: the motor body include with pivot, the being fixed in that the worm is connected pivot last runner assembly and support the static subassembly of pivot, lift door motor self-locking structure still includes:

the friction assembly is sleeved on the rotating shaft and located between the rotating assembly and the static assembly, and two ends of the friction assembly are respectively used for being abutted against the rotating assembly and the static assembly to block the rotating assembly from rotating.

Optionally, the friction assembly comprises:

the first friction piece is arranged between the rotating assembly and the static assembly, two ends of the first friction piece are respectively used for being abutted against the rotating assembly and the static assembly, and the first end of the first friction piece forms sliding friction with the rotating assembly, or the other end of the first friction piece forms sliding friction with the static assembly.

Optionally, the friction assembly comprises:

the first friction piece is arranged between the rotating assembly and the static assembly;

the second friction piece is arranged between the rotating assembly and the first friction piece; and

the two ends of the elastic piece are respectively abutted with the first friction piece and the second friction piece so as to respectively drive the first friction piece to be abutted with the static assembly and the second friction piece to be abutted with the rotating assembly;

wherein the first friction member forms sliding friction with the stationary assembly, or the second friction member forms sliding friction with the rotating assembly.

Optionally, the elastic member is a spring, and the elastic member is sleeved on the rotating shaft.

Optionally, the elastic member is an annular elastic sheet, and the elastic member is sleeved on the rotating shaft.

Optionally, the first friction member and the second friction member are annular members, and the first friction member and the second friction member are respectively sleeved on the rotating shaft.

Optionally, the automatically locking structure of overhead door motor still includes the shell, be equipped with in the shell and hold the accommodation space of motor body, static subassembly includes:

the bearing is sleeved at one end, far away from the worm, of the rotating shaft, and one end of the bearing is abutted to the first friction piece; and

and the bearing cover is sleeved on the bearing and used for fixing the bearing on the shell.

Optionally, the bearing cap comprises:

the annular body is arranged on the periphery of the bearing in an annular mode, and the outer periphery of the annular body is connected with the shell; and

the elastic parts are arranged in the annular body in a spaced mode, one end of each elastic part is connected with the annular body, and the other end of each elastic part is abutted to the outer peripheral wall of the bearing.

Optionally, the rotating assembly comprises:

the rotor is sleeved on the rotating shaft, and the second friction piece is used for being abutted to the rotor.

Optionally, the rotating assembly further comprises:

the two opposite cylindrical parts are sleeved on the rotating shaft and located on two sides of the rotor, and the second friction part is used for being abutted against the cylindrical parts.

The utility model provides a lift gate motor auto-lock structure's beneficial effect lies in: compared with the prior art, the utility model discloses overhead door motor self-locking structure, when worm wheel back drive, thereby produce static friction power with runner assembly and static subassembly butt respectively through friction subassembly's both ends, when the runner assembly has the rotation trend, make friction subassembly and runner assembly produce sliding friction, in order to block the runner assembly rotation, perhaps make friction subassembly and static subassembly produce sliding friction, and transmit and give the runner assembly, thereby block the runner assembly rotation, and combine the worm wheel and worm auto-lock, the reliability is improved, the overhead door that arouses when avoiding the worm wheel to drive the worm rotation weighs down, make whole overhead door motor self-locking structure more stable when the auto-lock, the reliability is higher, and this friction subassembly increases the inside at the motor, there is not obvious volume change to the motor, do not influence appearance and installation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic perspective view of a self-locking structure of a motor of a lift door provided in an embodiment of the present invention;

fig. 2 is a schematic view of a three-dimensional structure of the self-locking structure of the motor of the lifting door provided by the embodiment of the present invention after the housing is removed;

fig. 3 is a schematic view of an explosion structure of the self-locking structure of the motor for the lifting door provided by the embodiment of the present invention after the housing is removed;

fig. 4 is a schematic view of an explosion structure of the self-locking structure of the motor for the lifting door provided by the embodiment of the present invention after the housing is removed;

fig. 5 is an exploded schematic view of a self-locking structure of a motor of a lifting door according to an embodiment of the present invention;

FIG. 6 is a partially enlarged schematic view of portion A of FIG. 5;

fig. 7 is a schematic perspective view of a bearing cap according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1. the motor of the lifting door has a self-locking structure; 2. a worm; 3. a worm gear; 4. a motor body; 41. a rotating assembly; 411. a rotor; 412. a tubular member; 42. a stationary component; 421. a bearing; 422. a bearing cap; 4221. an annular body; 4222. an elastic portion; 43. a rotating shaft; 5. a friction assembly; 51. an elastic member; 52. a first friction member; 521. a first ring body portion; 522. a second ring body portion; 523. a third ring body portion; 53. a second friction member; 531. a fourth ring portion; 532. a fifth ring body portion; 533. a sixth ring body portion; 6. a housing; 7. and a permanent magnet.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the 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, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and fig. 2 together, a self-locking structure 1 of a motor for a lift door according to an embodiment of the present invention will now be described. The self-locking structure 1 of the motor of the lifting door comprises a motor body 4, a worm 2 in transmission connection with the motor body 4 and a worm wheel 3 meshed with the worm 2. The motor body 4 includes a rotating shaft 43 connected to the worm 2, a rotating assembly 41 fixed to the rotating shaft 43, and a stationary assembly 42 supporting the rotating shaft 43. The self-locking structure 1 of the motor of the lifting door further comprises a friction assembly 5, the friction assembly 5 is sleeved on the rotating shaft 43 and is located between the rotating assembly 41 and the static assembly 42, and two ends of the friction assembly 5 are respectively used for being abutted against the rotating assembly 41 and the static assembly 42, so that the rotating assembly 41 is blocked from rotating. The specific working principle is as follows:

the friction assembly 5 is installed between the stationary assembly 42 and the rotating assembly 41, and the worm 2, the rotating shaft 43 and the rotating assembly 41 are integrated. At this time, the friction member 5 abuts against the rotating member 41 to generate static friction force, and the friction member 5 abuts against the stationary member 42 to generate static friction force. When the worm wheel 3 is driven by external torque to drive the worm 2 to rotate, the rotating shaft 43 and the rotating component 41 are driven to rotate at the same time, when the rotating component 41 rotates, if the static friction force between the friction component 5 and the rotating component 41 is greater than the static friction force between the friction component 5 and the static component 42, because the rotating component 41 is fixedly connected with the rotating shaft 43, the friction component 5 rotates together with the rotating shaft 43 and the rotating component 41, sliding friction is generated between the friction component 5 and the static component 42, friction resistance exists, and then the friction resistance is transmitted to the rotating component 41 through the friction component 5, so that resistance is formed on the rotating component 41, namely, the rotating component 41 is prevented from rotating.

When the rotating member 41 tends to rotate, if the static friction force between the friction member 5 and the rotating member 41 is smaller than the static friction force between the friction member 5 and the stationary member 42, sliding friction is generated between the friction member 5 and the rotating member 41, and there is frictional resistance, which forms resistance to the rotating member 41.

Compared with the prior art, the self-locking structure 1 of the motor of the lifting door provided by the utility model has the advantages that when the worm wheel 3 is driven reversely, the friction component 5 and the rotating component 41 are abutted to generate static friction force, and the friction component 5 and the static component 42 are abutted to generate friction force, when the rotating component 41 has a rotation trend, the friction component 5 and the rotating component 41 generate sliding friction to block the rotating component 41 from rotating, or the friction component 5 and the static component 42 generate sliding friction to be transmitted to the rotating component 41 to block the rotating component 41 from rotating, the reliability of the self-locking structure is improved by combining the worm wheel 3 and the worm 2, the lifting door falling caused when the worm wheel 3 drives the worm 2 to rotate is avoided, the self-locking structure 1 of the motor of the whole lifting door is more stable during self-locking, the reliability is higher, and the friction component 5 is added in the motor, and no obvious volume change exists for the motor, the appearance and the installation are not influenced.

It should be noted that the worm 2, the rotating shaft 43 and the rotating assembly 41 are fixedly connected to form an integral structure, and when the motor body 4 is energized to rotate forward and the rotating assembly 41 actively rotates, the friction assembly 5 generates friction force, but the influence on the rotation of the motor body 4 is small. When the motor body 4 is stopped and the worm wheel 3 is subjected to external torque, the worm wheel 3 is forced to rotate and drives the worm 2 to rotate, the worm 2 is connected with the rotating shaft 43 and the rotating assembly 41 of the motor body 4 into a whole, the rotating assembly 41 also rotates passively, the motor body 4 does not generate torque but only receives torque converted and transmitted by the worm wheel 3 and the worm 2, and the converted torque is very small, so that the friction assembly 5 can prevent the rotating assembly 41 from rotating according to the generated friction resistance, and the worm wheel 3 is prevented from rotating.

In one embodiment of the present invention, referring to fig. 3 to 5, the friction element 5 includes a first friction member 52. The first friction member 52 is disposed between the elastic member 51 and the stationary component 42, and two ends of the first friction member 52 are respectively used for abutting against the rotating component 41 and the stationary component 42, and a first end of the first friction member 52 forms sliding friction with the rotating component 41 to block the rotating component 41 from rotating, or a second end of the first friction member 52 forms sliding friction with the stationary component 42 and transmits the sliding friction to the rotating component 41 to block the rotating component 41 from rotating.

In another embodiment of the present invention, referring to fig. 3 to 5, the friction assembly 5 includes a first friction member 52, a second friction member 53 and an elastic member 51, the first friction member 52 is disposed between the rotating assembly 41 and the stationary assembly 42, and the second friction member 53 is disposed between the rotating assembly 41 and the first friction member 52. The two ends of the elastic element 51 are respectively abutted against the second friction element 53 and the first friction element 52 to respectively drive the first friction element 52 to abut against the stationary component 42 and the second friction element 53 to abut against the rotating component 41, and the elastic force of the elastic element 51 is received to respectively press the first friction element 52 to abut against the stationary component 42 and the second friction element 53 to abut against the rotating component 41, when the rotating component 41 has a rotating trend, the elastic element and the second friction element 53 generate a mutual friction movement or drive the second friction element 53 to rotate, and the rotating component 41 is blocked to rotate under the influence of the friction force, so that the self-locking of the worm wheel 3 and the worm 2 is assisted.

The specific principle is as follows:

when the rotating component 41 tends to rotate, if the static friction force between the friction component 5 and the rotating component 41 is greater than the static friction force between the friction component 5 and the stationary component 42, since the rotating component 41 and the rotating shaft 43 are fixedly connected together, the friction component 5 and the rotating shaft 43 rotate together, sliding friction is generated between the friction component 5 and the stationary component 42, friction resistance exists, and then the friction resistance is transmitted to the rotating component 41 through the friction component 5, so that resistance is formed on the rotating component 41, namely, the rotating component 41 is prevented from rotating.

In summary, in this process, whether the friction assembly 5 rotates with the rotating assembly 41 or the stationary assembly 42 is stationary, the resistance applied to the rotating assembly 41 is equal, and the total resistance applied to the rotating assembly 41 is constant when any one or more of the components of the friction assembly 5 rotates or is stationary.

The following embodiments are provided based on the elastic member 51 of different structures:

the first embodiment is as follows:

referring to fig. 3, the elastic member 51 is a spring, and the elastic member 51 is sleeved on the rotating shaft 43. The spring is a mechanical part which works by utilizing elasticity, and the part made of elastic materials deforms under the action of external force and returns to the original shape after the external force is removed. A spring is used as the elastic member 51 to facilitate abutment with the first friction member 52 and the second friction member 53.

Example two:

referring to fig. 4, the elastic member 51 is an annular elastic sheet, and the elastic member 51 is sleeved on the rotating shaft 43. The elastic sheet is bent, so that the elastic sheet is conveniently connected with the first friction piece 52 and the second friction piece 53 respectively, and the contact area of the elastic sheet serving as the elastic piece 51 with the first friction piece 52 and the second friction piece 53 is larger.

In another embodiment of the present invention, referring to fig. 3, 5 and 6, the first friction member 52 and the second friction member 53 are ring-shaped members, and the first friction member 52 and the second friction member 53 are respectively sleeved on the rotating shaft 43, so that the first friction member 52 is in surface contact with the stationary component 42, and the second friction member 53 is in surface contact with the rotating component 41.

Specifically, the first friction member 52 includes a first ring body 521, a second ring body 522, and a third ring body 523, which are sequentially disposed, the first ring body 521 is disposed adjacent to the elastic member 51, the third ring body 523 is disposed adjacent to the stationary component 42, thicknesses of the first ring body 521 and the second ring body 522 are the same, and a thickness of the third ring body 523 is greater than thicknesses of the first ring body 521 and the second ring body 522. By setting the thickness of the third ring body 523 close to the stationary component 42 to be greater than the thicknesses of the first ring body 521 and the second ring body 522, the third ring body 523 is prevented from being worn away due to friction with the stationary component 42.

The second friction member 53 includes a fourth ring body 531, a fifth ring body 532, and a sixth ring body 533 arranged in this order. The fourth ring body 531 is disposed adjacent to the rotating assembly 41, the sixth ring body 533 is disposed adjacent to the elastic member 51, the thickness of the fifth ring body 532 is the same as that of the sixth ring body 533, and the thickness of the fourth ring body 531 is greater than that of the fifth ring body 532 and that of the sixth ring body 533. By setting the thickness of the fourth ring body portion 531 near the rotating assembly 41 to be larger than the thickness of the fifth ring body portion 532 and the sixth ring body portion 533, the lack of wear of the fourth ring body portion 531 caused by friction between the fourth ring body portion 531 and the rotating assembly 41 is avoided.

In another embodiment of the present invention, referring to fig. 1, fig. 2, fig. 5 and fig. 6, the self-locking structure 1 of the motor for the lift gate further includes a housing 6, a receiving space for receiving the motor body 4 is provided in the housing 6, and the stationary component 42 includes a bearing 421 and a bearing cover 422. The bearing 421 is sleeved on one end of the rotating shaft 43 away from the worm 2, one end of the bearing 421 abuts against the first friction member 52, the bearing cover 422 is sleeved on the bearing 421, and the bearing cover 422 is used for fixing the bearing 421 on the housing 6.

In another embodiment of the present invention, with further reference to fig. 6 and 7, the bearing cap 422 includes a ring-shaped body 4221 and a plurality of elastic portions 4222. The ring-shaped body 4221 is annularly arranged on the periphery of the bearing 421, the outer periphery of the ring-shaped body 4221 is connected with the shell 6, the elastic parts 4222 are annularly arranged in the ring-shaped body 4221 at intervals, one end of each elastic part 4222 is connected with the ring-shaped body 4221, and the other end of each elastic part 4222 is abutted against the outer peripheral wall of the bearing 421.

In another embodiment of the present invention, referring to fig. 2 and 3, the rotating assembly 41 includes a rotor 411. The rotor 411 is sleeved on the rotating shaft 43, and the second friction member 53 is used for abutting against the rotor 411.

The self-locking mechanism of the lifting door motor further comprises a permanent magnet 7, the permanent magnet 7 is connected with the shell 6 through an adhesive and is annularly arranged on the outer side of the rotor 411, and when a magnetic field generated by the permanent magnet 7 interacts with a magnetic field generated by the rotor 411, the rotor 411 runs.

In another embodiment of the present invention, referring to fig. 2 and fig. 3, the rotating assembly 41 further includes two opposite cylindrical members 412, the cylindrical members 412 are sleeved on the rotating shaft 43 and located at two sides of the cylindrical member 412 of the rotor 411, and the second friction member 53 is used for abutting against the cylindrical member 412. By providing two cylinders 412 and disposing the rotor 411 between the two cylinders 412, the second friction member 53 is prevented from directly contacting the rotor 411 to wear the rotor 411.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a lift gate motor self-locking structure, include motor body, with the worm that the motor body transmission is connected and with worm gear, its characterized in that: the motor body include with pivot, the being fixed in that the worm is connected pivot last runner assembly and support the static subassembly of pivot, lift door motor self-locking structure still includes:

2. The self-locking structure of the motor of the lifting door according to claim 1, characterized in that: the friction assembly includes:

3. The self-locking structure of the motor of the lifting door according to claim 1, characterized in that: the friction assembly includes:

4. The self-locking structure of the motor of the lifting door according to claim 3, characterized in that: the elastic piece is a spring and is sleeved on the rotating shaft.

5. The self-locking structure of the motor of the lifting door according to claim 3, characterized in that: the elastic piece is an annular elastic sheet, and the elastic piece is sleeved on the rotating shaft.

6. The self-locking structure of the motor of the lifting door according to claim 3, characterized in that: the first friction piece and the second friction piece are annular pieces, and the first friction piece and the second friction piece are respectively sleeved on the rotating shaft.

7. The self-locking structure of the motor of the lifting door according to claim 6, characterized in that: the elevating door motor self-locking structure still includes the shell, be equipped with in the shell and hold the accommodation space of motor body, static subassembly includes:

8. The self-locking structure of the motor of the lifting door according to claim 7, characterized in that: the bearing cap includes:

9. The self-locking structure of the motor of the lifting door according to claim 7, characterized in that: the rotating assembly includes:

10. The self-locking structure of the motor of the lifting door according to claim 9, characterized in that: the rotating assembly further comprises: