WO2022016940A1

WO2022016940A1 - Driving device for vehicle sunroof

Info

Publication number: WO2022016940A1
Application number: PCT/CN2021/090335
Authority: WO
Inventors: 茅为星; 欧阳帆; 马鹏勃; 盛文
Original assignee: 广东德昌电机有限公司
Priority date: 2019-07-23
Filing date: 2021-04-27
Publication date: 2022-01-27
Also published as: CN112277597A

Abstract

A driving device (100) for a vehicle sunroof, comprising a motor (10), a transmission mechanism connected to the motor (10), and an output shaft (30) that rotates when driven by the transmission mechanism. The periphery of the output end of the output shaft (30) is integrally provided with multiple teeth (31); the multiple teeth (31) are used to drive a sunroof to move back and forth; a through hole (50) running through the output shaft (30) in the axial direction is provided in the output shaft (30); the through hole (50) comprises a first recess hole (51), a middle hole (52), and a second recess hole (53) that are communicated in sequence; the first recess hole (51) is adjacent to the input end of the output shaft (30); the middle hole (52) is a non-circular hole; the second recess hole (53) is adjacent to the output end of the output shaft (30); the shapes and/or sizes of the second recess hole (53) and the middle hole (52) are different, and the lateral size of at least one of the first recess hole (51) and the second recess hole (53) is not less than the minimum lateral size of the middle hole (52); the output shaft (30) protrudes radially at a substantially central position to form an annular protrusion (54); the middle hole (52) is formed in the annular protrusion (54).

Description

Drive unit for vehicle sunroof

technical field

The present invention relates to the field of drive technology, in particular to a drive device for a vehicle sunroof.

Background technique

At present, the opening and closing of the vehicle sunroof is mainly adjusted by the drive device. The driving device generally includes a motor and an output gear connected to the output shaft of the motor through a transmission mechanism. A vehicle sunroof is generally fixedly connected with a mechanism for converting rotational motion into translational motion in cooperation with the gear. When the motor rotates, the transmission mechanism rotates the gear driven by the motor, and then drives the sunroof to slide to open or close the sunroof opening. However, when the vehicle encounters an emergency and the power is suddenly cut off, the motor cannot work normally, the sunroof cannot be opened, and the personnel in the vehicle cannot escape through the sunroof, which poses a great safety hazard.

technical problem

In view of this, the present invention aims to provide a driving device for a vehicle sunroof that can solve the above-mentioned problems.

technical solutions

To this end, the present invention provides a driving device for a vehicle sunroof, comprising a motor, a transmission mechanism connected with the motor, and an output shaft rotated under the driving of the transmission mechanism, the output shaft at the output end of the driving device. A plurality of teeth are integrally formed on the peripheral edge, and the plurality of teeth are used to drive the sunroof to reciprocate. The output shaft is provided with a through hole that penetrates the output shaft in the axial direction, and the through hole includes a first connected in sequence. a concave hole, an intermediate hole and a second concave hole, wherein the first concave hole is adjacent to the input end of the output shaft, the intermediate hole is a non-circular hole, and the second concave hole is adjacent to the output end of the output shaft, The shape and/or size of the second concave hole is different from that of the intermediate hole, and the lateral dimension of at least one of the first concave hole and the second concave hole is not less than the minimum lateral dimension of the intermediate hole, and the output shaft An annular protrusion protrudes radially at a substantially central position, and the intermediate hole is formed in the annular protrusion.

In some embodiments, the output shaft protrudes radially inward to form an annular protrusion at a position approximately 1/2˜1/4 of its height, and the intermediate hole is formed in the annular protrusion.

In some embodiments, the longitudinal cross-section of the output shaft is substantially H-shaped.

In some embodiments, the contour of the hole wall of the middle hole is a regular hexagon, and the second concave hole is circular.

In some embodiments, a housing is further included, and the axial bottom end of the annular protrusion of the output shaft is substantially at the same level as the axial top end of the housing.

In some embodiments, it further includes a casing, the casing includes a support member, the output shaft is rotatably connected with the support member, the support member is a support shaft, and the output shaft is integrally formed with a an end receiving hole for receiving the support shaft, the first concave hole is integrally formed in the support shaft and penetrates the support shaft in the axial direction.

In some embodiments, a surface of the support member opposite to the output shaft and/or a surface of the output shaft opposite to the support member is concavely formed with a solvent groove for accommodating a solvent.

In some embodiments, the transmission mechanism includes a worm connected to a motor shaft of the motor, and a worm gear engaged with the worm, and a connection structure is provided between the worm gear and the output shaft, and the connection structure It includes a protrusion and a groove that are snap-fitted in the axial direction, and one of the axial end face of the output shaft at the input end and an axial end face of the worm gear forms the protrusion, and the other forms the protrusion. the card slot.

In some embodiments, a casing and a wave washer are further included, the transmission mechanism includes a worm gear connected to the output shaft, a first receiving cavity is formed in the casing for receiving the worm gear, and the wave washer Arranged between an axial end face of the housing and the axial end face of the worm gear and/or the output shaft, the wave washer includes a plurality of peaks and valleys alternately connected in the circumferential direction, the peaks Both the top and the valley are curved.

In some embodiments, the output shaft is made of powder metallurgy.

beneficial effect

By providing an output shaft integrally formed with teeth, the present invention can effectively reduce the assembly process, and the transmission process is also more stable. In addition, since the middle hole of the present invention is a non-circular hole, when the vehicle encounters an emergency situation such as falling into the water, the person in the vehicle can insert the emergency tool matched with the middle hole into the middle hole, and then manually turn the emergency rod, and then Rotate the output shaft through the middle hole to manually open the sunroof for escape.

Description of drawings

FIG. 1 is a perspective view of a drive device for a vehicle sunroof according to an embodiment of the present invention.

FIG. 2 is an exploded view of the drive device shown in FIG. 1 .

FIG. 3 is a cross-sectional view of the drive device shown in FIG. 1 .

FIG. 4 is a perspective view of an output shaft of the drive device shown in FIG. 2 .

Embodiments of the present invention

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, so as to make the technical solutions and beneficial effects of the present invention clearer. It should be understood that the accompanying drawings are only used for reference and description, and are not used to limit the present invention, and the dimensions shown in the accompanying drawings are only for the convenience of clear description, and do not limit the proportional relationship.

Referring to FIGS. 1 to 4 , a driving device 100 for a vehicle sunroof according to an embodiment of the present invention includes a motor 10 , a transmission mechanism connected to the motor 10 , a housing 20 for accommodating the transmission mechanism, and a transmission mechanism connected to the motor 10 . The output shaft 30 connected to the transmission mechanism. When the motor 10 works, the transmission mechanism drives the output shaft 30 to rotate. The output shaft 30 of the present invention is integrally formed with a plurality of teeth 31 on the periphery of the output end thereof, for driving the sunroof to reciprocate, thereby opening or closing the sunroof. By integrally forming the teeth 31 on the output shaft 30, the assembly process can be reduced, and the transmission process is also more stable.

In this embodiment, the transmission mechanism includes a worm 41 connected with the rotating shaft 11 of the motor 10 , and a worm wheel 42 engaged with the worm 41 , and the output shaft 30 is connected to the worm wheel 42 in a torsionally fixed manner. It can be understood that, in other embodiments, the transmission mechanism may also be constituted by other transmission components, as long as it can transmit the torque of the motor 10 to the output shaft 30 , preferably also has the function of deceleration.

In this embodiment, the housing 20 includes a base 21 and a cover 22 that are detachably connected, and a first accommodation cavity 23 is formed between the base 21 and the cover 22 for accommodating the worm gear 42 . In this embodiment, the base 21 further includes a second accommodating cavity 24 for accommodating the worm 41 , and the axis of the second accommodating cavity 24 is perpendicular to the axis of the first accommodating cavity 23 . The second accommodating cavity 24 is provided with an opening 25 on one side, which is used to communicate the second accommodating cavity 24 and the first accommodating cavity 23 , so that the meshing of the worm 41 and the worm wheel 42 is possible.

The output shaft 30 of the present invention is provided with a through hole 50 which penetrates the output shaft 30 in the axial direction. The through hole 50 includes a first concave hole 51 , a middle hole 52 and a second concave hole 53 communicated in sequence, wherein the first concave hole 51 is adjacent to the input end of the output shaft 30 and extends from the axial lower end of the driving device 100 . Axially recessed upward, the second concave hole 53 is adjacent to the output end of the output shaft 30 and is recessed axially downward from the axial upper end of the driving device 100 . The second recessed hole 53 is different in shape and/or size from the intermediate hole 52, and/or is configured on a different component. In this embodiment, the first concave hole 51 and the second concave hole 53 are both circular holes. The middle hole 52 is a non-circular hole. In other embodiments, the first concave hole and/or the second concave hole may also be a non-circular hole, such as a square hole. The lateral dimension of at least one of the first concave hole 51 and the second concave hole 53 is not smaller than the minimum lateral dimension of the middle hole 52 , so that a shaft that can cooperate with the middle hole 52 can be inserted into the middle hole 52 via at least one end of the middle hole 52 Inside. When the vehicle encounters an emergency situation, such as falling into the water, the person in the vehicle can insert the emergency tool, such as a prismatic shaft, which is matched with the middle hole 52, into the middle hole 52, and then manually rotate the emergency rod to pass through the middle hole. 52 Rotate the output shaft 30 to manually open the sunroof to achieve escape. In order to conveniently describe the size relationship between the middle hole 52 and other holes, in this embodiment, the minimum lateral size of the middle hole 52 is defined as the diameter of the middle hole 52 , and the lateral size of the first concave hole 51 and the second concave hole 53 is defined as are the diameters of the first concave holes 51 and the second concave holes 53 , therefore, the diameters described herein are not limited to the size of circular holes but may also refer to the dimensions of non-circular holes.

The diameter of the first concave hole 51 or the second concave hole 53 is preferably larger than the diameter of the middle hole 52, so as to form a step in the output shaft 30. In this way, in the process of manufacturing the output shaft 30, it is more conducive to the connection between the output shaft 30 and the mold. Separation, demolding is easier. Preferably, the output shaft 30 is integrally made by powder metallurgy. More preferably, the diameters of the first concave hole 51 and the second concave hole 53 are larger than the diameter of the middle hole 52, so that the emergency tool can be inserted into the middle hole 52 from both ends of the middle hole 52, and the operator can choose more freely. , the operation is faster and more convenient.

In this embodiment, the middle hole 52 and the second concave hole 53 are integrally formed in the output shaft 30 , wherein the second concave hole 53 is recessed axially downward from the axial top end of the output shaft 30 . Specifically, the output shaft 30 protrudes radially inward to form an annular protrusion at a substantially middle position (specifically, at a position approximately 1/2 to 1/4 of its height in the axial direction) 54. The middle hole 52 is formed in the annular protrusion 54 , and the second concave hole 53 is adjacent to the axial top end of the annular protrusion 54 . In other words, two holes with different diameters are integrally formed in the output shaft 30 in this embodiment, and the emergency tool is inserted into the hole with a smaller diameter (ie, the middle hole) through the hole with the larger diameter (ie the second concave hole 53 ). 52) to drive the output shaft 30. As mentioned above, since the diameter of the second concave hole 53 is larger than that of the middle hole 52 , it is more conducive to the demolding of the output shaft 30 . In this embodiment, the outline of the hole wall of the middle hole 52 is a regular hexagon, and the second concave hole 53 is circular. It can be understood that, in other embodiments, the hole wall contour of the middle hole 52 can also be in other non-circular shapes, such as triangle, quadrangle, octagon, ellipse, or D shape. The contour of the hole wall of the second concave hole 53 may also be in other shapes, such as a polygon. Specifically in this embodiment, the output shaft protrudes radially inward to form an annular protrusion at a position of approximately 1/2-1/4 of the height of the output shaft in an axial top-down direction. Of course, it can be understood that in other embodiments, the output shaft may also be radially inward at a position along the axis of its height that is approximately 1/2 to 1/4 in the bottom-up direction. The protrusion forms an annular protrusion. In this embodiment, the output shaft 30 is further integrally formed with an end receiving hole 36 at the input end thereof. The end receiving hole 36 is concave upward from the axial bottom end of the output shaft 30 in the axial direction, and the contour of the hole wall is preferably circular. In this embodiment, the end receiving hole 36 is in direct communication with the middle hole 52 , that is, the end receiving hole 36 is adjacent to the axial bottom end of the annular protrusion 54 . In addition, the diameter of the end receiving hole 36 is larger than the diameter of the middle hole 52 , and the diameter of the second concave hole 53 is larger than the diameter of the middle hole 52 . Therefore, the longitudinal section of the output shaft 30 is approximately H-shaped. In other words, in this embodiment, the output shaft 30 is integrally formed with three holes penetrating through itself in the axial direction: namely, the end receiving hole 36 , the middle hole 52 and The second concave hole 53, and the central axes of the three holes coincide.

In the present invention, the axial bottom end is defined as the end face adjacent to the input end of the output shaft 30 , and the axial top end is defined as the end face adjacent to the output end of the output shaft 30 .

In this embodiment, a support member is formed in the center of the first accommodating cavity 23 on the base 21 . Specifically, the support member is a support shaft 26 . The outer diameter of the support shaft 26 is slightly smaller than the diameter of the end receiving hole 36 and larger than the diameter of the middle hole 52 , so that the output shaft 30 can be sleeved on the support shaft 26 and can be relatively supported The shaft 26 rotates. In the present embodiment, the axial bottom end of the output shaft 30 abuts on the base 21 , the axial top end penetrates the cover plate 22 , and the teeth 31 of the output end are located outside the cover plate 22 to facilitate transmission. In this embodiment, the first concave hole 51 is integrally formed in the base 21 , and is recessed upward from the axial bottom end of the base 21 to penetrate through the support shaft 26 . Preferably, the first concave hole 51 is also circular, and the diameters of the axial sections thereof are the same. The first concave hole 51 is directly adjacent to the axial lower end of the middle hole 52 , and the central axis of the first concave hole 51 coincides with the central axis of the middle hole 52 and the second concave hole 53 . Preferably, the diameter of the first concave hole 51 is larger than that of the middle hole 52 , so the operator can also insert an emergency tool from the input end of the output shaft 30 into the middle hole 52 to rotate the output shaft 30 . Also preferably, the middle hole 52 is arranged adjacent to the output end of the output shaft 30 , that is, the depth of the first concave hole 51 is greater than the depth of the second concave hole 53 . The contact area between the output shafts 30 improves the rotational stability of the output shafts 30 .

A concave solvent groove (not shown in the figure) may also be provided on the outer surface of the support shaft 26 opposite to the output shaft 30 , for example, on the outer peripheral wall of the support shaft 26 , for accommodating the solvent. The solvent may be, for example, lubricating oil to reduce rotational friction between the output shaft 30 and the support shaft 26 and reduce or eliminate noise. Alternatively or additionally, in other embodiments, a concave solvent groove may also be provided on the inner surface of the output shaft 30 opposite to the support shaft 26, for example, on the circumferential hole wall of the end receiving hole 36, to use To accommodate solvent, in order to achieve the same or better lubricating effect. The shape, number and arrangement of solvent tanks can be varied according to specific needs without limitation. For example, the solvent groove may be an arc-shaped groove distributed along the circumferential direction, or may be a plurality of concave grooves spaced along the axial and/or circumferential direction, equidistantly and/or unequally spaced.

In this embodiment, a connection structure is provided between the worm gear 42 and the output shaft 30 , so that the output shaft 30 rotates synchronously with the worm gear 42 . Specifically, the connection structure includes a protrusion 71 formed at the axial top end of the worm wheel 42 and a snap groove 72 formed at the axial bottom end of the output shaft 30 . Through the snap fit of the protrusion 71 and the snap groove 72 in the axial direction, when the worm wheel 42 rotates, the output shaft 30 also rotates. The protrusion 71 is preferably in the shape of a cuboid. Correspondingly, the groove wall of the slot 72 is also preferably in the shape of a rectangular parallelepiped. In this way, the worm wheel 42 can stably drive the output shaft 30 to rotate synchronously regardless of whether the worm wheel 42 rotates forwardly or reversely. . In order to further improve the transmission stability of the worm gear 42 and the output shaft 30, it is preferable to form a plurality of the protrusions 71 spaced in the circumferential direction and evenly distributed at the axial top end of the worm gear 42. Correspondingly, the shaft of the output shaft 30 A plurality of the card grooves 72 spaced in the circumferential direction and evenly distributed are also formed toward the bottom end. It can be understood that, in other embodiments, the protrusion 71 can also be formed on the axial top end of the output shaft 30 , and the locking groove 72 can also be formed on the axial bottom end of the worm wheel 42 .

In this embodiment, an annular flange 37 is formed at the input end of the output shaft 30 to extend radially outward, and the plurality of locking grooves 72 are formed on the axial end surface of the annular flange 37 . Preferably, a snap ring 420 is also formed on the worm gear 42 . The snap ring 420 includes a connecting ring 421 extending axially upward from the top end of the output shaft 30 , and an inner ring 422 extending radially inward from the top end of the connecting ring 421 . . The snap ring 420 and the axial top end of the output shaft 30 form an annular cavity 423 for receiving the annular flange 37 of the output shaft 30 . Specifically, the worm wheel 42 can be made of plastic material, and the aforementioned shape of the worm wheel 42 covering the annular flange 37 can be formed by overmolding. By arranging the annular flange 37 of the output shaft 30 in the annular cavity 423 of the worm gear 42, not only can the connection strength of the two be further improved, thereby improving the transmission stability of the two, but also the worm gear 42 can be positioned so that the It is possible to maintain a certain gap between the two axial ends and the housing 20 , thereby reducing the rotational resistance of the worm gear 42 and reducing the vibration and noise of the entire driving device 100 .

Preferably, an annular groove 424 is formed between the inner ring edge 422 of the worm gear 42 and the output shaft 30 , and a wave washer 80 is arranged in the annular groove 424 . A wave washer 80 is located between the axial top end of the annular flange 37 and the axial bottom end of the cover plate 22 . In this embodiment, the wave washer 80 includes several peaks 81 protruding in the axial direction and valleys 82 recessed in the axial direction. The peaks 81 and the valleys 82 are alternately arranged in the circumferential direction, and the peaks 81 and the valley portion 82 are both curved. The vibration and shock between the output shaft 30 and the housing 20 can be damped by the wave washer 80 . In addition, an annular enclosure wall 223 is formed at the top of the cover plate 22 in this embodiment, and the output shaft 30 is located in the center of the annular enclosure wall 223 and is arranged spaced from the annular enclosure wall 223 .

When assembling, the worm 41 can be first fixed to the rotating shaft 11 of the motor and then loaded into the second receiving cavity 24 of the base 21, and the output shaft 30 integrally connected with the worm gear 42 can be inserted into the support shaft 26 of the base 21, At the same time, the worm gear 42 and the worm 41 are engaged, and then the wave washer 80 is installed, and then the cover plate 22 is sleeved on the outer periphery of the output shaft 30 and is fixedly connected with the base 21 . In this embodiment, due to the aforementioned height relationship between the end receiving hole 36 , the middle hole 52 and the second concave hole 53 , the axial bottom end of the annular protrusion 54 of the assembled output shaft 30 is connected to the cover plate 22 . The axial tops of the s are approximately at the same level.

The above descriptions are only preferred specific embodiments of the present invention, and the protection scope of the present invention is not limited to the above-listed embodiments. Any person skilled in the art who is familiar with the technical field of the present invention can obviously obtain the technical Simple changes or equivalent replacements of the solutions all fall within the protection scope of the present invention.

Claims

A driving device for a vehicle sunroof, comprising a motor, a transmission mechanism connected with the motor, and an output shaft that rotates under the drive of the transmission mechanism, wherein the output shaft is on the periphery of its output end A plurality of teeth are integrally formed, and the plurality of teeth are used to drive the sunroof to reciprocate. The output shaft is provided with a through hole extending through the output shaft in the axial direction, and the through hole includes first concave holes connected in sequence. , a middle hole and a second concave hole, wherein the first concave hole is adjacent to the input end of the output shaft, the middle hole is a non-circular hole, the second concave hole is adjacent to the output end of the output shaft, the The shape and/or size of the second concave hole is different from that of the intermediate hole, and the lateral dimension of at least one of the first concave hole and the second concave hole is not smaller than the minimum lateral dimension of the intermediate hole, and the output shaft is approximately The middle position protrudes radially to form an annular protrusion, and the middle hole is formed in the annular protrusion.
The drive device according to claim 1, wherein the output shaft protrudes radially inward to form an annular protrusion at a position approximately 1/2 to 1/4 of its height, and the middle hole forms an annular protrusion. in the annular protrusion.
The drive device according to claim 1, wherein the longitudinal section of the output shaft is substantially H-shaped.
The driving device according to claim 1, characterized in that, the outline of the hole wall of the intermediate hole is a regular hexagon, and the second concave hole is circular.
The driving device according to claim 1, further comprising a housing, the axial bottom end of the annular protrusion of the output shaft and the axial top end of the housing are substantially at the same level.
The driving device according to claim 1, further comprising a housing, the housing comprising a support member, the output shaft is rotatably connected with the support member, the support member is a support shaft, and the An end accommodating hole for accommodating the supporting shaft is integrally formed in the output shaft, and the first concave hole is integrally formed in the supporting shaft and penetrates the supporting shaft in the axial direction.
The driving device according to claim 6, wherein the surface of the support member opposite to the output shaft and/or the surface of the output shaft opposite to the support member is concavely formed for accommodating the solvent solvent tank.
The drive device according to claim 1, wherein the transmission mechanism comprises a worm connected to a motor shaft of the motor, and a worm gear engaged with the worm, and a worm gear is provided between the worm and the output shaft. There is a connection structure, the connection structure includes a protrusion and a groove that are snap-fitted in the axial direction, and one of the axial end face of the output shaft at the input end and an axial end face of the worm gear forms the Protrusions, the other of which forms the card slot.
The driving device according to claim 1, further comprising a casing and a wave washer, the transmission mechanism comprising a worm gear connected to the output shaft, and a first accommodation cavity is formed in the casing for accommodating For the worm gear, the wave washer is arranged between an axial end face of the housing and the axial end face of the worm gear and/or the output shaft, and the wave washer includes a plurality of peaks alternately connected in the circumferential direction. Both the peak and the valley are curved.
The drive device according to claim 1, wherein the output shaft is made of powder metallurgy.