CN214946020U - Damper and actuator - Google Patents

Abstract

The utility model provides a attenuator and driver, attenuator (400) includes: a damper housing (410) having a proximal face (411) and a distal face (412) spaced apart along an axial direction (XX '), and a side surface (413) connecting the proximal face (411) and the distal face (412), the side surface (413) being provided with an external thread, a damping element receiving cavity (414) and a support plate receiving cavity (415) being provided adjacent along the axial direction (XX') within the damper housing (410), the support plate receiving cavity (415) being open on the proximal face (411); an elastic damping element (420) housed in the damping element receiving cavity (414); and a rigid support plate (430) received in the support plate receiving cavity (415) and contacting the elastic damping element (420). The damper is screwed into the housing of the drive in order to exert an axial pretension on its drive shaft.

Description

Damper and actuator

Technical Field

The utility model relates to a mechanical transmission field, more specifically relates to a can utilize driver of motor production power and exert the attenuator of pretightning force to its transmission shaft.

Background

In the field of mechanical transmission, a driver for generating power by using a motor and transmitting the power to other components is widely used, for example, in the field of automobiles, the driver can be used for transmitting the power generated by the motor to a window so as to drive the window to open and close. The driver often includes a transmission shaft receiving power from the motor and an output shaft coupled to the transmission shaft to transmit the power to a driven member, however, due to manufacturing errors and the like, an axial gap inevitably exists between the respective coupling members coupling the transmission shaft and the output shaft together, resulting in a large noise generated when the driver operates, particularly, when the operation direction is switched, and being disadvantageous to the service life of the driver. Therefore, it is necessary to apply an axial preload to the drive shaft by means of the elastic element in order to eliminate this axial play. However, in the known drives, the elastic element is often fixed directly in the housing of the drive, which results in a very precise positioning of the elastic element and the drive shaft in order to apply a suitable axial pretensioning force to the elastic element, and the position of the drive shaft cannot be flexibly adjusted as required and cannot be replaced quickly and easily after embrittlement and ageing of the elastic element, for which reason the known drives have very high manufacturing, assembly and maintenance costs.

Therefore, there is a need in the art for a solution that can flexibly adjust the pretension applied to the transmission shaft, even change the axial position of the transmission shaft, and can reduce the manufacturing, assembly, and maintenance costs of the drive.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a damper, it includes:

a damper housing having a proximal end face and a distal end face spaced apart in an axial direction and a side surface connecting the proximal end face and the distal end face, the side surface being provided with an external thread, the damper housing being provided therein with a damping element receiving cavity and a support plate receiving cavity adjacent in the axial direction, the support plate receiving cavity being open on the proximal end face;

an elastic damping element received in the damping element receiving cavity; and

a rigid support plate received in the support plate receiving cavity and contacting the elastic damping element.

According to an alternative embodiment of the invention, a shoulder connecting the side wall of the damping element receiving chamber to the side wall of the support plate receiving chamber is formed in the damper housing, the shoulder and the rigid support plate being arranged facing each other.

According to an optional embodiment of the invention, the shoulder defines a depth of the damping element receiving cavity measured in the axial direction, the depth being smaller than a height of the elastic damping element measured in the axial direction.

According to an alternative embodiment of the invention, the side wall of the damping element receiving cavity has a plurality of size varying portions locally varying its radial size.

According to an alternative embodiment of the invention, the plurality of dimensional change portions are recessed in the damper housing, thereby forming a space for receiving the portion of the elastic damping element that expands radially as a result of being subjected to axial compression.

According to an alternative embodiment of the invention, the plurality of size change portions protrude into the damping element receiving cavity, so that a space is formed therebetween for receiving a portion of the elastic damping element which is radially expanded by the axial compression.

According to the utility model discloses an optional embodiment, be equipped with on the lateral wall of rigid backup pad and hinder the commentaries on classics part, be equipped with on the lateral wall in backup pad receiving chamber and match the part, hinder the commentaries on classics part with it forms the keyway structure that extends along axial direction to match the part.

According to an optional embodiment of the present invention, the elastic damping element is in transition fit with the damping element receiving cavity, and the rigid support plate is in clearance fit with the support plate receiving cavity.

According to an alternative embodiment of the invention, the distal end face of the damper housing is provided with a tool engagement portion for engaging a rotary tool.

Also in order to solve the problems in the prior art, the present invention further provides a driver, which includes:

the damper comprises a shell provided with a damper receiving hole, wherein an internal thread is arranged on the side wall of the damper receiving hole;

a drive shaft received in the housing,

a motor housed in the housing, the motor adapted to drive the drive shaft in rotation, wherein,

the driver further comprises a damper as described above, the external thread on the side surface of the damper housing cooperates with the internal thread on the side wall of the damper receiving hole, and the transmission shaft is configured to be able to compress the elastic damping element in the axial direction against and through the rigid support plate.

The invention may be embodied in the exemplary embodiments shown in the drawings. It is to be noted, however, that the drawings are designed solely for purposes of illustration and that any variations which come within the teachings of the invention are intended to be included therein.

Drawings

The accompanying drawings illustrate exemplary embodiments of the invention. These drawings should not be construed as necessarily limiting the scope of the invention, wherein:

fig. 1 is a schematic cross-sectional view of a drive according to an embodiment of the present invention;

fig. 2 is a schematic perspective exploded view of a damper according to an embodiment of the present invention;

FIG. 3 is a schematic perspective cross-sectional view of a damper housing of the damper shown in FIG. 2;

FIG. 4 is a schematic front cross-sectional view of a damper housing of the damper shown in FIG. 2;

FIG. 5a is a schematic top view of a damper housing of the damper shown in FIG. 2;

figure 5b is a schematic top view of a damper housing of a damper according to another embodiment of the present invention; and

figure 6 is a schematic perspective view of the damper housing of the damper shown in figure 2 showing a distal end face thereof.

Detailed Description

Further features and advantages of the present invention will become apparent from the following description, which proceeds with reference to the accompanying drawings. Exemplary embodiments of the invention are illustrated in the accompanying drawings, and the various drawings are not necessarily drawn to scale. This invention may, however, be embodied in many different forms and should not be construed as necessarily limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided only to illustrate the present invention and to convey the spirit and substance of the invention to those skilled in the art.

The present invention aims to provide a drive suitable for generating power with an electric motor and for transmitting the power generated by the electric motor, the drive comprising a transmission shaft coupled at one end with the rotor of the electric motor so as to receive power from the rotor of the electric motor, and further comprising an output shaft operatively connected with the transmission shaft so as to transmit power from the electric motor to the output shaft, which output shaft can be coupled with a position adjustable component, such as a car, so as to move it. That is, the drive according to the present invention is adapted to transmit the power generated by the motor to the driven member, such as a window of a vehicle and an openable roof, etc. The driver further includes a damper in contact with the other end of the transmission shaft, the damper being adjustable in position, and by adjusting the position of the damper, it is possible to apply an appropriate axial preload to the transmission shaft and to change the axial position of the transmission shaft so as to eliminate an axial gap between the engagement members of the transmission shaft and the output shaft, thereby allowing the engagement members of the transmission shaft and the output shaft to maintain contact during operation even when the direction of operation is switched. Therefore, because the position of the damper is adjustable, according to the utility model discloses a driver can transmit power more steadily and eliminate the noise that produces because of the axial clearance between the part, in addition, this axial clearance no longer need eliminate through the manufacturing standard who improves each part of driver, therefore, the production manufacturing cost of driver can reduce.

An alternative but non-limiting embodiment of a damper and a driver using the same according to the present invention is described in more detail below with reference to the accompanying drawings. As used herein, in the usual sense in the art, "axial direction" refers to the direction in which the axis about which the drive shaft is intended to rotate (i.e., the axis of the drive shaft itself after the drive is assembled), the "radial direction" refers to the direction in which the radius or diameter of any circle centered on the axis is located, and the "circumferential direction" refers to the direction tangential to any circle centered on the axis. Further, "proximal" refers to the side facing in the axial direction towards the inside of the driver housing, while "distal" refers to the side facing in the axial direction towards the outside of the driver housing. It is to be understood, however, that the use of the foregoing terms, each indicating a relative orientation, are intended merely to more clearly convey the concept and teachings of the invention in connection with the accompanying drawings, and should not be construed in any way as limiting the scope of the invention.

Referring to fig. 1, there is shown a schematic cross-sectional view of a drive according to an embodiment of the present invention. As shown in fig. 1, the drive comprises a housing 100 and a drive shaft 200 and an output shaft 300 rotatably accommodated in the housing 100, wherein the drive shaft 200 is coupled on the one hand with the motor for rotation about its axis or axial direction XX' under the drive of the motor and on the other hand with the output shaft 300 for rotation about its axis of the output shaft 300, while the output shaft 300 can be coupled with a window, an openable roof or the like of a vehicle for position-adjustable vehicle components for moving the vehicle components. In the arrangement shown, the axis of the output shaft 300 is transverse to the axis of the drive shaft 200, and the drive shaft 200 and the output shaft 300 constitute a worm drive. More specifically, the drive shaft 200 is provided with the worm 210 non-rotatably connected thereto, for example, the worm 210 may be sleeved and welded to the worm 210, or the worm 210 may be connected to the drive shaft 200 by a spline structure, of course, the rotation teeth of the worm may be directly machined on the drive shaft 200 so that a portion of the drive shaft 200 forms the worm 210, and in a similar manner, the output shaft 300 is provided with the worm wheel 310 non-rotatably connected thereto, and the drive shaft 200 is coupled with the output shaft 300 by meshing the teeth of the worm wheel 310 with the teeth of the worm 210, so that the rotation of the drive shaft 200 will be converted into the rotation of the output shaft 300. As described above, in order to eliminate the axial gap between the teeth of the worm wheel 310 and the teeth of the worm 210 so as to maintain the contact therebetween to ensure smooth transmission of power, it is necessary to apply a suitable pre-tension to the drive shaft 200 and/or to adjust the axial position of the drive shaft 200, and for this, the driver further includes a damper 400 received in the damper receiving hole 110 of the housing 100, wherein the damper 400 is in contact with the end 220 of the drive shaft 200, and the axial position of the damper 400 is adjustable. In this configuration, it is possible to apply an appropriate preload to the propeller shaft 200 and/or adjust the axial position of the propeller shaft 200 by adjusting the axial position of the damper 400, so as to achieve smooth transmission of power.

An alternative but non-limiting embodiment of a damper 400 according to the present invention is described in more detail below with reference to fig. 1-6, wherein fig. 2 shows a schematic perspective exploded view of the damper 400, fig. 3 shows a schematic perspective cross-sectional view of a damper housing 410 of the damper 400, fig. 4 shows a schematic cross-sectional view of the damper 400, fig. 5a and 5b show top views of the damper housing 410 of the damper 400, and fig. 6 shows a schematic perspective view of the damper housing 410 of the damper 400. As shown in fig. 1 and 2, the damper 400 includes a damper housing 410 intended to be connected to the housing 100 of the driver, and a damping element 420 and a support plate 430 accommodated within the damper housing 410. The damper housing 410 has a proximal face 411 and a distal face 412 spaced apart along the axial direction XX', and a side surface 413 connecting the proximal face 411 with the distal face 412, wherein the proximal face 411 is intended to be oriented facing the drive shaft 200, the distal face 412 is intended to be oriented facing away from the drive shaft 200, and the side surface 413 is provided with an external thread which can cooperate with an internal thread provided on a side wall of the damper receiving bore 110. In this configuration, the damper 400 can be screwed into the damper receiving hole 110, and the axial position of the damper 400 can be conveniently and rapidly adjusted by screwing the damper 400. In particular, as shown in fig. 1, the damper receiving hole 110 is open to the outside of the housing 100, whereby the damper 400 can be screwed from the outside of the housing 100, thereby conveniently and quickly adjusting the axial position of the damper 400 even after the driver is assembled. It is worth mentioning that although the damper 400 is shown to be fitted into the damper receiving hole 110 in an axial position adjustable manner by means of the screw connection in the drawings, it is understood that the damper 400 is also fitted into the damper receiving hole 110 by means of the friction fit or the like, in the case of employing the friction fit, the axial position of the damper 400 can be adjusted by pushing the damper 400 along the damper receiving hole 110, and thus the present invention is not limited to the above screw connection. As shown in fig. 3 and 4, the damper housing 410 is provided internally with a damping element receiving cavity 414 and a support plate receiving cavity 415 communicating or adjacent in the axial direction XX', wherein the damping element receiving cavity 414 is adapted to receive the damping element 420 and is located adjacent to the distal end face 412, in particular the damping element 420 is in transition fit with the damping element receiving cavity 414, the support plate receiving cavity 415 is adapted to receive the support plate 430 and is located adjacent to the proximal end face 411, and has an opening in the proximal end face 411 such that the drive shaft 200 can pass through the opening against the support plate 430, in particular the support plate 430 is in clearance fit with the support plate receiving cavity 415 to facilitate movement of the support plate 430 within the support plate receiving cavity 415. In this configuration, as shown in fig. 1, the damping element 420 abuts at its distal end against the damper housing 410 and at its proximal end against the distal end of the support plate 430, and the support plate 430 abuts at its proximal end against the drive shaft 200, whereby the damping element 420 can apply an axial pretension to the drive shaft 200 through the support plate 430 and damp axial movement of the drive shaft 200, and by adjusting the axial position of the damper housing 410, the axial positions of the damping element 420 and the support plate 430 can be changed, which in turn can serve to adjust the pretension applied to the drive shaft 200 and to adjust the axial position of the drive shaft 200. In particular, the damping element 420 may be made of an elastic material known in the art, such as rubber, and the support plate 430 may be made of a rigid material known in the art, such as Polyamide (PA). During assembly, the damping element 420 may be first assembled in the damping element receiving cavity 414, the support plate 430 then assembled in the support plate receiving cavity 415, and thereafter the damper 400 may be screwed into the damper receiving hole 110 until the transmission shaft 200 is able to at least partially compress the damping element 420 via the support plate 430 during motor operation.

In an alternative embodiment of the present invention, as shown in fig. 2, the damping element 420 and the damping element receiving cavity 414 are both generally cylindrical and the damping element 420 is positioned coaxially with the damping element receiving cavity 414, and in particular, the damping element 420, the damping element receiving cavity 414, and the drive shaft 200 are all coaxial after the damper 400 is assembled to the driver. In this configuration, the relationship between the amount of compression of the damping element 420 in the axial direction XX' and the pretension provided by the damping element 420 can be determined, thereby facilitating the presetting of the pretension applied to the drive shaft 200 by adjusting the axial position of the damper 400. In particular, as shown in fig. 5a and 5b, the sidewall of the damping element receiving cavity 414 has a plurality of size varying portions 416, and these size varying portions 416 locally vary the radial size of the damping element receiving cavity 414. More specifically, as shown in FIG. 5a, these size change portions 416 are recessed into the damper housing 410 radially outward relative to the remainder of the side wall of the damping element receiving cavity 414, thereby forming a plurality of grooves extending in the axial direction. In this configuration, the remaining portion of the side wall of the damping element receiving chamber 414 can be in contact with the damping element 420 to hold the damping element 420, and when the damping element 420 is pressed in the axial direction XX', the grooves form receiving spaces that can receive portions of the damping element 420 that expand radially outward due to the pressing in the axial direction, so that this configuration can both reliably position the damping element 420 and ensure that the damping element 420 can be freely elastically deformed after being pressed, thereby reliably applying an axial preload to the propeller shaft 200 using the damping element 420. Alternatively, as shown in FIG. 5b, these size change portions 416 protrude radially inward into the damping element receiving cavity 414 relative to the remainder of the sidewall of the damping element receiving cavity 414, forming a plurality of protrusions extending in the axial direction. In this configuration, the protrusions may contact the damping element 420 to hold the damping element 420, and when the damping element 420 is pressed in the axial direction XX', the remaining portions of the side walls of the damping-element receiving cavity 414 form accommodating spaces between the protrusions, which may receive portions of the damping element 420 that expand radially outward due to the pressing in the axial direction, so that the configuration may also both reliably position the damping element 420 and ensure that the damping element 420 is free to elastically deform after being pressed, thereby reliably applying an axial preload force to the propeller shaft 200 using the damping element 420. Advantageously, these size variations 416 may be evenly distributed along the circumferential direction, which may ensure that the damping element 420 is regularly deformed when being axially compressed, so that the axial pretension provided by the damping element 420 can be accurately predicted.

In an alternative embodiment of the present invention, as shown in fig. 2-5 b, a rotation blocking portion 431 is provided on the sidewall of the support plate 430, and a matching portion 417 is provided on the sidewall of the support plate receiving cavity 415, the rotation blocking portion 431 and the matching portion 417 being configured to cooperate with each other such that the support plate 430 can translate along the axial direction XX' in the support plate receiving cavity 415 but cannot rotate. In this configuration, the support plate 430 may be prevented from rotating with the drive shaft 200, thereby wearing the damping element 420 or the side wall of the support plate receiving cavity 415. In particular, as shown in fig. 2 to 5a, the rotation blocking portion 431 is formed of a plurality of grooves axially extending formed on the sidewall of the support plate 430, and the mating portion 417 is formed of a plurality of ribs axially extending formed on the sidewall of the support plate receiving cavity 415, the plurality of ribs being configured to be received in the plurality of grooves, thereby forming a key groove structure extending in an axial direction, which enables the mating portion 417 not only to prevent the support plate 430 from rotating but also to guide the support plate 430 to move axially. Alternatively, as shown in fig. 5b, the mating portion 417 is formed by a plurality of axially extending grooves formed on the sidewall of the support plate receiving cavity 415, and the rotation blocking portion 431 is formed by a plurality of axially extending ribs formed on the sidewall of the support plate 430, the plurality of ribs being configured to be received in the plurality of grooves, thereby forming a keyway structure extending in an axial direction, which also enables the mating portion 417 not only to prevent the support plate 430 from rotating, but also to guide the support plate 430 to move axially.

In an alternative embodiment of the present invention, as shown in fig. 3 to 4, a shoulder 418 extending in the circumferential direction connecting the side wall of the damping element receiving chamber 414 to the side wall of the support plate receiving chamber 415 is formed in the damper housing 410, and the shoulder 418 is configured to face axially inward, that is, to face the support plate 430. Thus, in this configuration, after the support plate 430 abuts the shoulder 418, the support plate 430 can no longer continue to move into the damper housing 410, and thus the shoulder 418 defines the maximum axial displacement of the support plate 430. In particular, as shown in fig. 3 and 4, the shoulder 418 also defines a depth D (measured in the axial direction XX ') of the damping element receiving cavity 414 that is less than a height H (measured in the axial direction XX') of the damping element 420, such that, upon assembly of the damping element 420 into the damping element receiving cavity 414, the damping element 420 will extend axially inward beyond the shoulder 418, in which configuration the difference between the height H and the depth D is the axially maximum compression of the damping element 420.

In an alternative embodiment of the present invention, as shown in fig. 6, a tool engagement portion 419 is provided on the distal end surface 412 of the damper housing 410, and the tool engagement portion 419 may be engaged with a tool (e.g., a wrench, a screwdriver, etc.) to enable an operator to install the damper 400 in place with the tool, such as by screwing the damper 400 into the damper receiving hole 110 with a screwdriver until a desired position. In particular, the tool engaging portion 419 may be a recess recessed into the distal end face 412, which may have a straight, cruciform, hexagonal, etc. shape to engage a screwdriver having a correspondingly shaped tip.

Alternative but non-limiting embodiments of the damper and of the driver according to the invention are described in detail above with the aid of the figures. Modifications and additions to the techniques and structures, as well as re-combinations of features in various embodiments, which do not depart from the spirit and substance of the disclosure, will be readily apparent to those of ordinary skill in the art as included within the scope of the invention. Accordingly, such modifications and additions as can be envisaged within the teachings of the present invention are considered to be part of the present invention. The scope of the present invention includes both equivalents known at the time of filing and equivalents not yet foreseen.

Claims (10)

1. A damper (400), characterized in that the damper (400) comprises:

a damper housing (410) having a proximal face (411) and a distal face (412) spaced apart along an axial direction (XX '), and a side surface (413) connecting the proximal face (411) and the distal face (412), the side surface (413) being provided with an external thread, a damping element receiving cavity (414) and a support plate receiving cavity (415) being provided adjacent along the axial direction (XX') within the damper housing (410), the support plate receiving cavity (415) being open on the proximal face (411);

an elastic damping element (420) housed in the damping element receiving cavity (414); and

a rigid support plate (430) received in the support plate receiving cavity (415) and contacting the elastic damping element (420).

2. A damper (400) according to claim 1, wherein a shoulder (418) connecting a side wall of the damping element receiving chamber (414) to a side wall of the support plate receiving chamber (415) is formed in the damper housing (410), the shoulder (418) and the rigid support plate (430) being arranged facing each other.

3. A damper (400) according to claim 2 wherein said shoulder (418) defines a depth (D) of said damping element receiving cavity (414) measured in the axial direction (XX ') that is less than a height (H) of said elastic damping element (420) measured in the axial direction (XX').

4. A damper (400) as set forth in any of claims 1-3 wherein said side wall of said damping element receiving cavity (414) has a plurality of size varying portions (416) that locally vary a radial size thereof.

5. A damper (400) as set forth in claim 4 wherein said plurality of size change portions (416) are recessed into said damper housing (410) forming a space for receiving a portion of said elastic damping element (420) that expands radially as a result of being axially compressed.

6. A damper (400) as set forth in claim 4 wherein said plurality of size change portions (416) protrude into said damping element receiving cavity (414) forming a space therebetween for receiving a portion of said elastic damping element (420) that expands radially as a result of being axially compressed.

7. A damper (400) according to any of claims 1-3, wherein the rigid support plate (430) is provided with a rotation blocking portion (431) on a side wall thereof, and the support plate receiving cavity (415) is provided with a mating portion (417) on a side wall thereof, the rotation blocking portion (431) and the mating portion (417) forming a keyway structure extending in the axial direction (XX').

8. A damper (400) as set forth in any of claims 1-3 wherein said elastic damping element (420) is transition fitted with said damping element receiving cavity (414) and said stiff support plate (430) is clearance fitted with said support plate receiving cavity (415).

9. A damper (400) according to any of claims 1-3, wherein a tool engagement portion (419) for engaging a rotating tool is provided on a distal end face (412) of the damper housing (410).

10. A driver, comprising:

a housing (100) provided with a damper receiving hole (110), a side wall of the damper receiving hole (110) being provided with an internal thread;

a transmission shaft (200) accommodated in the housing (100),

-an electric motor housed in said casing (100), said electric motor being adapted to drive in rotation said transmission shaft (200), characterized in that,

the driver further comprises a damper (400) according to any of claims 1-9, an external thread on a side surface of the damper housing (410) cooperating with an internal thread on a side wall of the damper receiving hole (110), and the transmission shaft (200) is configured to be able to compress the elastic damping element (420) against the stiff support plate (430) and through the stiff support plate (430) in an axial direction (XX').

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