CN112610681A

CN112610681A - Electronic parking gear transmission structure

Info

Publication number: CN112610681A
Application number: CN202011375014.3A
Authority: CN
Inventors: 杨沈军; 邵亮; 瞿文浩
Original assignee: WANXIANG QIANCHAO (SHANGHAI) AUTOMOBILE SYSTEM CO Ltd
Current assignee: WANXIANG QIANCHAO (SHANGHAI) AUTOMOBILE SYSTEM CO Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-04-06

Abstract

The invention discloses an electronic parking gear transmission structure, which comprises: encapsulate integrative end cover and casing from top to bottom, be provided with a planetary gear mechanism between end cover and the casing, planetary gear mechanism includes: the input wheel, the planet support, the planet gear and the planet gear ring; one end of the input wheel is installed on the end cover, the other end of the input wheel is connected with the planet support shaft, the planet gear ring is of an integrated structure formed by injection molding of a metal insert and the shell, and the planet gear is arranged on one side, facing the input wheel, of the planet support and can rotate along the planet gear ring. This electron parking gear drive structure can improve the precision of ring gear, and the wearability is better moreover, and then improves the precision and the life-span of whole gear drive mechanism operation.

Description

Electronic parking gear transmission structure

Technical Field

The invention relates to the technical field of electronic parking, in particular to an electronic parking gear transmission structure.

Background

In the transmission mechanism of the electronic parking caliper, gear transmission is used for converting the rotation of a motor into the clamping force of the caliper to a brake disc. In the prior art, the gear precision of a planetary gear ring is low, the abrasion is serious, and the running precision and the service life of the whole gear transmission mechanism are influenced.

Disclosure of Invention

Aiming at the problems in the prior art, the electronic parking gear is provided, the precision of a gear ring can be improved, the wear resistance is good, and the running precision and the service life of the whole gear transmission mechanism are further improved.

The specific technical scheme is as follows:

an electronic parking gear transmission structure mainly comprises: encapsulate end cover and casing as an organic whole from top to bottom, the end cover with be provided with a planetary gear mechanism between the casing, planetary gear mechanism includes: the input wheel, the planet support, the planet gear and the planet gear ring;

one end of the input wheel is installed on the end cover, the other end of the input wheel is connected with the shaft of the planet carrier, the planet gear ring adopts a metal insert and is integrally injection-molded with the shell, and the planet gear is arranged on one side of the planet carrier, which faces the input wheel, and can rotate along the planet gear ring.

In the electronic parking gear transmission structure, the input wheel is provided with a limiting ring on one side facing the planetary gear, and the limiting ring abuts against the planetary gear.

In the electronic parking gear transmission structure, the planetary carrier is of a disc structure, is located on the side of the planetary gear ring, which is away from the input wheel, and is coaxially connected with the input wheel.

In the above-mentioned electronic parking gear transmission structure, it is further characterized in that the planet wheel includes at least two, and the at least two planet wheels are uniformly arranged on the planet carrier.

In the above-mentioned electronic parking gear transmission structure, the electronic parking gear transmission structure further has a feature that a motor, a retainer, a driving wheel and an intermediate gear set are further arranged between the end cover and the housing, an output end of the motor penetrates through the retainer and is connected with the driving wheel shaft, and the intermediate gear set is respectively connected with the driving wheel and the input wheel in a meshing manner.

In the above-described electronic parking gear transmission structure, the intermediate gear set further includes a first intermediate gear and a second intermediate gear that are coaxially disposed, the first intermediate gear is in meshing connection with the driving wheel, and the second intermediate gear is in meshing connection with the input wheel.

In the above electronic parking gear transmission structure, the first intermediate gear and the second intermediate gear share a positioning shaft, one end of the positioning shaft is fixed on the housing, and the other end of the positioning shaft sequentially penetrates through the retainer and the end cover.

In foretell electron parking gear drive structure, such characteristic still has, the confession has been seted up to the intermediate gear group the shaft hole that the location axle passed, first intermediate gear is for being close to a gear that the end cover set up, the second intermediate gear is for keeping away from the end cover just is close to a gear that the holder set up, first intermediate gear with second intermediate gear structure as an organic whole, first intermediate gear orientation one side of end cover is provided with first oil storage tank, first oil storage tank centers on the location axle sets up, the second intermediate gear orientation one side of holder is provided with the second oil storage tank, the second oil storage tank centers on the location axle sets up, first oil storage tank with the second oil storage tank all with the shaft hole is linked together.

In the electronic parking gear transmission structure, the electronic parking gear transmission structure is further characterized in that one side of the retainer, which is far away from the positioning shaft, is provided with a limiting boss, and the shell is provided with a limiting groove matched with the limiting boss.

In the electronic parking gear transmission structure, the electronic parking gear transmission structure is further characterized in that a rubber pad is arranged on one side of the motor, which is far away from the end cover, and the rubber pad is clamped between the shell and the motor.

The positive effects of the technical scheme are as follows:

according to the electronic parking gear transmission structure, the planetary gear ring is of an integral structure formed by injection molding of the metal insert and the shell, the planetary gear ring made of metal is high in precision and good in wear resistance, and the running precision and the service life of the whole gear transmission mechanism are improved; the oil storage tank of the middle gear set is provided with a shaft hole which can be continuously lubricated for matching, so that the noise is reduced, the abrasion is reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of an electronic parking gear transmission structure provided in an embodiment of the invention;

fig. 2 is an exploded view of an electronic parking gear transmission structure provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of a first oil reservoir and a second oil reservoir provided in an embodiment of the present invention;

fig. 4 is a partial structural schematic view of the electronic parking gear transmission structure of fig. 1.

In the drawings: 1. a housing; 11. a limiting groove; 2. an end cap; 3. a motor; 4. a holder; 41. a limiting boss; 5. a drive wheel; 6. an intermediate gear set; 61. a first intermediate gear; 611. a first oil reservoir; 612. a first shaft hole; 62. a second intermediate gear; 621. a second oil reservoir; 622. a second shaft hole; 63. a shaft hole; 7. a planetary gear mechanism; 71. an input wheel; 711. a limiting ring; 72. a planet carrier; 73. a planetary gear; 74. a planetary gear ring; 8. positioning the shaft; 9. and (7) a rubber pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The numbering of the components themselves, such as "first", "second", etc., is used herein only to distinguish between the objects depicted and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an electronic parking gear transmission structure according to an embodiment of the present invention; fig. 2 is an exploded view of an electronic parking gear transmission structure provided in an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a de-oiling tank according to an embodiment of the present invention; fig. 4 is a partial structural schematic view of the electronic parking gear transmission structure of fig. 1. The embodiment of the invention discloses an electronic parking gear transmission structure which comprises an end cover 2 and a shell 1 which are vertically packaged into a whole.

And a motor 3, a retainer 4, a driving wheel 5, an intermediate gear set 6 and a planetary gear mechanism 7 are arranged between the end cover 2 and the shell 1.

A holder 4 is located between the end cap 2 and the housing 1. The output end of the motor 3 penetrates through the retainer 4 and is fixedly connected with the driving wheel 5.

One side of holder 4 towards motor body and motor body shape looks adaptation, slot position interference fit on holder 4 and the casing 1 to increase motor 3's lateral stability, preferably, motor 3 deviates from one side of end cover 2 is provided with rubber pad 9, and rubber pad 9 presss from both sides and establishes between casing 1 and motor 3, and rubber pad 9 compresses tightly motor 3 along motor 3's axial direction together with end cover 2 and forms stable axial support.

The intermediate gear set 6 is respectively connected with the driving wheel 5 and the planetary gear mechanism 7 in a meshing manner.

Alternatively, the intermediate gear set 6 includes a first intermediate gear 61 and a second intermediate gear 62 which are coaxially disposed, the first intermediate gear 61 is in meshing connection with the driving wheel 5, and the second intermediate gear 62 is in meshing connection with the planetary gear mechanism 7.

Further, the first intermediate gear 61 and the second intermediate gear 62 share a positioning shaft 8, one end of the positioning shaft 8 is fixed on the housing 1, and the other end of the positioning shaft sequentially penetrates through the holder 4 and the end cover 2. Correspondingly, the first intermediate gear 61 and the second intermediate gear 62 are respectively provided with a first shaft hole 612 and a second shaft hole 622 through which the positioning shaft 8 passes. Alternatively, the first intermediate gear 61 and the second intermediate gear 62 may be a split structure, or may be an integrated structure.

Preferably, in this embodiment, the first intermediate gear 61 and the second intermediate gear 62 are an integral structure, and the intermediate gear set 6 is provided with a shaft hole 63 through which the positioning shaft 8 passes.

The first intermediate gear 61 is a gear disposed adjacent to the end cap 2, and the second intermediate gear 62 is a gear disposed away from the end cap 2 and adjacent to the holder 4. The first intermediate gear 61 has a larger diameter than the second intermediate gear 62, and the second intermediate gear 62 having a smaller diameter is in meshing engagement with the planetary gear mechanism 7.

First intermediate gear 61 orientation one side of end cover 2 is provided with first oil reservoir 611, first oil reservoir 611 centers on the setting of location axle 8, second intermediate gear 62 orientation one side of holder 4 is provided with second oil reservoir 621, second oil reservoir 621 centers on the setting of location axle 8, first oil reservoir 611 with second oil reservoir 621 respectively with the relative both ends in shaft hole 63 are linked together. The first oil storage groove 611 on one side of the end cover 2 and the end cover 2 form a relatively closed oil storage cavity, the second oil storage groove 621 on one side of the retainer 4 and the retainer 4 form a relatively closed oil storage cavity, and a certain amount of lubricating grease is added into the oil storage cavity, so that the continuous and quantitative grease content in the shaft hole 63 can be kept, and the good lubricating effect of the intermediate gear set 6 is ensured.

In this embodiment, the positioning shaft 8 penetrates through the holder 4 to limit the holder 4, thereby increasing the lateral stability of the motor 3.

And one side of the retainer 4, which is far away from the positioning shaft 8, is provided with a limiting boss 41, and the shell 1 is provided with a limiting groove 11 matched with the limiting boss 41. The limiting boss 41 is accommodated in the limiting groove 11, so that the rotation of the retainer 4 can be avoided, and the limitation of the retainer 4 is realized.

Preferably, the limiting boss 41 is disposed on one side of the holder 4 symmetrical to the positioning shaft 8, and is used for limiting the holder 4 together with the positioning shaft 8, so as to better ensure the lateral stability of the motor 3.

The planetary gear mechanism 7 includes: input wheel 71, planet carrier 72, planet gears 73 and planet ring gear 74.

One end of the input wheel 71 is fixed on the end cover 2, and specifically, one end of a gear shaft of the input wheel 71 is fixed on the end cover 2.

The planet gear ring 74 and the shell 1 are molded together into a whole by adopting a metal insert.

The planet carrier 72 is of a disc-shaped structure, is located on the side of the planet ring gear 74 facing away from the input wheel 71, and is coaxially connected with the input wheel 71.

The pinion gear 73 is provided on a side of the planet carrier 72 facing the input wheel 71, and is rotatable along the ring gear 74. Specifically, the planet gears 73 are located on and in the same plane as the planet ring gear 74 to rotate along the planet ring gear 74.

Specifically, the axes of the input wheel 71, planet carrier 72, planet gear 73 and planet ring gear 74 are all parallel to each other, and the axes of the input wheel 71, planet carrier 72 and planet ring gear 74 are collinear.

Alternatively, the planetary gears 73 include at least two, which are uniformly disposed on the planetary carrier 72. Of course, the number of the planetary gears 73 may be three, and may be other numbers. This is merely an example and is not intended to limit the present invention.

In the electronic parking gear transmission structure in this embodiment, the motor 3 drives the driving wheel 5 to rotate, the driving wheel 5 drives the intermediate gear set 6 to rotate, the intermediate gear set 6 drives the input wheel 71 to rotate, and then drives the planet carrier 72 to rotate, the planet carrier 72 drives the planet gear 73 to rotate along the planet gear ring 74, and the output is output to the brake caliper to clamp the brake disc to realize parking.

In the electronic parking gear transmission structure in the embodiment, the planetary gear ring 74 and the shell 1 form a whole in an insert injection molding mode, so that the gear ring precision can be greatly improved and the wear resistance is good compared with the gear ring directly injection molded in the current mode;

the whole gear system is arranged in the shell 1 and comprises the positioning shaft 8 for positioning the retainer 4, and meanwhile, the shell 1 adopts an insert injection molding mode to coat the planet gear ring 74, so that the precision of the whole gear system is improved, the noise is improved, the service life of the gear is prolonged, and the cost is reduced.

Further, a limiting ring 711 is disposed on one side of the input wheel 71 facing the planetary gear 73, and the limiting ring 711 abuts against the planetary gear 73. The arrangement of the limiting ring 711 can limit the axial movement of the planet gears 73, so that a planet spider is not required to be arranged between the planet gears 73, and the structure is simple and compact.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electronic parking gear transmission structure, comprising: encapsulate end cover and casing as an organic whole from top to bottom, the end cover with be provided with a planetary gear mechanism between the casing, planetary gear mechanism includes: the input wheel, the planet support, the planet gear and the planet gear ring;

2. The electronic parking gear transmission structure according to claim 1, wherein a limit ring is provided on a side of the input wheel facing the planetary gear, the limit ring abutting against the planetary gear.

3. The electronic parking gear transmission structure according to any one of claims 1 or 2, wherein the planet carrier is a disk-shaped structure, is located on a side of the planet ring gear facing away from the input wheel, and is coaxially connected with the input wheel.

4. The electronic parking gear transmission structure of claim 3, wherein the planet comprises at least two, and the at least two planet carriers are uniformly arranged on the planet carrier.

5. The electronic parking gear transmission structure according to any one of claims 1 or 2, wherein a motor, a retainer, a driving wheel and an intermediate gear set are further disposed between the end cover and the housing, an output end of the motor penetrates through the retainer and is fixedly connected with the driving wheel, and the intermediate gear set is respectively connected with the driving wheel and the input wheel in a meshing manner.

6. The electronic parking gear transmission structure according to claim 5, wherein the intermediate gear set includes a first intermediate gear and a second intermediate gear that are coaxially arranged, the first intermediate gear is in meshing connection with the drive wheel, and the second intermediate gear is in meshing connection with the input wheel.

7. The electronic parking gear transmission structure according to claim 6, wherein the first intermediate gear and the second intermediate gear share a positioning shaft, one end of the positioning shaft is fixed on the housing, and the other end of the positioning shaft sequentially penetrates through the retainer and the end cover.

8. The electronic parking gear transmission structure according to claim 7, wherein the intermediate gear set is provided with a shaft hole for the positioning shaft to pass through, the first intermediate gear is a gear adjacent to the end cover, the second intermediate gear is a gear away from the end cover and adjacent to the holder, the first intermediate gear and the second intermediate gear are of an integral structure, the first intermediate gear faces one side of the end cover and is provided with a first oil storage tank, the first oil storage tank surrounds the positioning shaft, the second intermediate gear faces one side of the holder and is provided with a second oil storage tank, the second oil storage tank surrounds the positioning shaft, and the first oil storage tank and the second oil storage tank are communicated with the shaft hole.

9. The electronic parking gear transmission structure according to claim 8, wherein a limit boss is disposed on a side of the holder away from the positioning shaft, and a limit groove matched with the limit boss is disposed on the housing.

10. The electronic parking gear transmission structure according to claim 5, wherein a rubber pad is disposed on a side of the motor facing away from the end cover, and the rubber pad is sandwiched between the housing and the motor.