CN210196416U

CN210196416U - Oil storage type gear box and speed reducer of automobile seat lifter

Info

Publication number: CN210196416U
Application number: CN201920053975.9U
Authority: CN
Inventors: Shuqiang Dou; 豆书强; Yunyu Wang; 王云玉; Kun Guo; 郭坤
Original assignee: GAC Component Co Ltd
Current assignee: GAC Component Co Ltd
Priority date: 2019-01-14
Filing date: 2019-01-14
Publication date: 2020-03-27
Anticipated expiration: 2029-01-14

Abstract

The utility model discloses an oil storage type gear box is equipped with the installation cavity that is used for installing drive assembly, the bottom of installation cavity has one and is used for the supporting drive assembly's mounting terminal surface, a axle mounting hole has been seted up downwards on the mounting terminal surface, the mounting terminal surface is provided with the oil storage tank that is used for holding lubricating oil. The utility model discloses can reduce among the gearbox casing the installation terminal surface and rather than contact and can be relative pivoted coefficient of friction between the part. The utility model also discloses an adopt the reduction gear of car seat riser of above-mentioned gearbox body. The utility model discloses can reduce the risk that the drive assembly of installing in the gear box was worn and torn.

Description

Oil storage type gear box and speed reducer of automobile seat lifter

Technical Field

The utility model relates to a gearbox casing structure for speed reducer of car seat riser.

Background

The lifter adjusted by the micromotor is a common device for adjusting the position of the automobile seat, an important component in the lifter is a speed reducer, a plurality of rotating parts are arranged in a gear box of the speed reducer, and the rotating parts are in surface-to-surface contact with the gear box body, so that the friction force of the whole system is increased, and the transmission efficiency of the whole system is reduced. Furthermore, the riser that is used for car seat to adjust at present, its gear box is mostly the working of plastics structure with rotating the part, and too big frictional force will lead to gear box and rotating the wearing and tearing of part serious, and then leads to the entire system to increase at the fit-up gap between the part of using a period back, reduces entire system's performance, also can be along with the phenomenon that the noise increase appears.

In the "reducer for a car seat up-down driver" disclosed in the utility model with the publication number of CN207583940U, the gear box body is used as a seal, and the inner cavity of the gear box is also used for supporting part of the eccentric shaft of the rotating part, and the eccentric shaft is in direct surface contact with the gear box body, so that the problems of abrasion of the parts in the gear box and increase of system noise can occur after a period of use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil storage type gearbox body, aim at reduce gearbox body and rotate the frictional force between the part, reduce the risk that rotates part and gear box integument wearing and tearing.

The utility model discloses an oil storage type gear box is equipped with the installation cavity that is used for installing drive assembly, the bottom of installation cavity has one and is used for the supporting drive assembly's mounting terminal surface, a axle mounting hole has been seted up downwards on the mounting terminal surface, a serial communication port, the mounting terminal surface is provided with the oil storage tank that is used for holding lubricating oil.

As one of the preferred design of oil storage tank, the mounting end face be equipped with a plurality of archs, the interval sets up between a plurality of archs, makes a plurality of archs with constitute between the mounting end face the oil storage tank.

As the second preferred design of oil storage tank, the oil storage tank be in the mounting end face on many sharp type grooves of seting up, every sharp type groove all follows the radial direction of axle mounting hole extends.

Preferably, the number of the linear grooves is three, and the three linear grooves are uniformly arranged around the central line of the shaft mounting hole at intervals.

Third as the preferred design of oil storage tank, the oil storage tank do a plurality of ring grooves of seting up on the mounting end face, each the centre of a circle in ring groove all is located on the central line of axle mounting hole.

More preferably, the circular ring-shaped groove is provided in two.

A second object of the present invention is to provide a speed reducer of a car seat lifter using the above gear box structure, which comprises a gear box body and a gear box cover that can be combined to form a gear box inner cavity, and a transmission mechanism, a planetary gear and an output gear are installed in the gear box inner cavity, the gear box body is provided with a mandrel, the output gear is provided with an internal gear and a driving gear for outputting power, the output gear is rotatably installed on the mandrel and makes the internal gear, the driving gear and the mandrel coaxial, the planetary gear meshes with the internal gear and forms a planetary gear pair with less tooth difference, and the transmission mechanism can transmit the power output by an external motor to the planetary gear, so that the planetary gear tends to make a planar motion on a plane perpendicular to the mandrel under the action of the transmission mechanism and the internal gear, the planar motion comprises rotation and revolution around the axis of the mandrel;

the inner cavity of the gear box is also provided with a motion decomposition mechanism, the motion decomposition mechanism consists of a floating disc and a pin column and is used for decomposing the trend of the planar motion of the planetary gear into the motions in the X direction and the Y direction which are vertical to each other, and the X direction and the Y direction are both positioned on the plane; the gearbox body is provided with an upper mounting cavity and a lower mounting cavity, a bearing surface is arranged between the upper mounting cavity and the lower mounting cavity, the upper mounting cavity is matched with the floating disc, so that the floating disc is mounted in the upper mounting cavity and is located on the bearing surface, and the floating disc can slide on the bearing surface along the Y direction; the floating disc is provided with a guide sliding groove extending along the X direction, the upper end of the pin is assembled with a pin mounting hole formed in the planetary gear in an interference fit manner, and the lower end of the pin is slidably mounted in the guide sliding groove of the floating disc;

the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, and the second transmission mechanism consists of a gear, an eccentric shaft and a bearing; the eccentric shaft is composed of an upper eccentric column and a lower eccentric disc, the eccentric shaft is provided with a middle hole penetrating through the eccentric column and the eccentric disc, the axis of the middle hole is parallel to the axis of the eccentric column, and the eccentric distance of the middle hole relative to the eccentric column is equal to the center distance between the planetary gear and the internal gear; the gear is injection-molded on the eccentric disc, so that the eccentric disc is fixed with the molded gear, and the gear is provided with a balance hole for balancing, so that the center of mass of the gear is on the rotation axis of the gear; a bearing mounting hole is formed in the center of the planet gear, a through hole is formed in the center of the floating disc, the eccentric column sequentially penetrates through the through hole and the bearing mounting hole, and the bearing is mounted between the bearing mounting hole and the eccentric column; the gear is arranged in the lower mounting cavity, the mandrel penetrates through a middle hole of the eccentric shaft and is in clearance fit with the middle hole, and the axis of the mandrel is superposed with the rotation axis of the gear; the external motor drives the gear to rotate through the first transmission mechanism; the upper mounting cavity and the lower mounting cavity form a mounting cavity of the oil storage type gearbox body, the mounting end face is arranged at the bottom of the lower mounting cavity, the mandrel is mounted in the shaft mounting hole, the eccentric shaft is the transmission assembly, and the mounting end face is used for supporting the eccentric shaft.

The utility model has the advantages of it is following:

the utility model discloses a set up the oil storage tank on gearbox housing is used for supporting drive assembly's mounting end face, the face contact just has relative rotation between the part among this mounting end face and the drive assembly, can reduce gearbox housing and rather than the rotational friction coefficient between the part of contact in the oil storage tank structure after scribbling lubricating oil, reduce frictional force. The abrasion of the gear box body and parts in contact with the gear box body in the using process can be reduced, and the phenomena of reduction of transmission efficiency, increase of noise and the like caused by the increase of assembly clearance after a transmission system in the gear box is used for a period of time are prevented.

Drawings

The drawings in the specification related to the present invention are briefly described below.

FIG. 1 is a schematic cross-sectional view illustrating a decelerator of a seat lifter of a vehicle according to the prior art;

FIG. 2 is a perspective view of the gear housing for the reduction gear of FIG. 1;

FIG. 3 is a schematic structural view of a gear according to the present invention;

FIG. 4 is a schematic structural diagram of a floating disc used in the present invention;

FIG. 5 is a schematic diagram of an output gear employed in the reducer of the present invention;

FIG. 6 is a schematic structural view of a gear housing according to the present invention;

FIG. 7 is a cross-sectional view taken at A-A of FIG. 6;

fig. 8 is a schematic structural view of a mounting end face of a gearbox housing according to a first embodiment of the present invention;

fig. 9 is a schematic structural view of a mounting end face of a gear housing according to a second embodiment of the present invention;

fig. 10 is a schematic structural view of a mounting end face of a gearbox housing according to a third embodiment of the present invention.

Description of reference numerals:

1-a gear box body; 1 a-a bearing surface; 1 b-an upper mounting cavity; 1 c-a lower mounting cavity; 11-a mounting end face; 111-bumps; 112-linear groove; 113-a circular groove; 12-worm mounting holes; 13-shaft mounting holes; 2-a worm; 3-a gear; 31-a balancing hole; 4-mandrel; 5-an output gear; 51-internal gear; 52-a drive gear; 6-eccentric shaft; 61-mesopores; 62-eccentric column; 63-eccentric disc; 7-a floating disc; 71-a via hole; 72-a guide chute; 8-a planetary gear; 9-gearbox cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example one

A decelerator of a seat lifter for an automobile as shown in fig. 1 to 7 is provided with a gear housing 1 and a gear housing cover 9 which can be combined to form an inner cavity of a gear housing, and a transmission mechanism, a planetary gear 8 and an output gear 5 are arranged in the inner cavity of the gear box, the gear box body 1 is provided with a mandrel 4, the output gear 5 is provided with an internal gear 51 and a driving gear 52 used for outputting power, the output gear 5 is rotatably arranged on the mandrel 4 and enables the internal gear 51, the driving gear 52 and the mandrel 4 to be coaxial, the planetary gear 8 is meshed with the internal gear 51 and forms a planetary gear pair with small tooth difference, the transmission mechanism can transmit the power output by the external motor to the planetary gear 8, so that the planetary gear 8 tends to do planar motion on a plane vertical to the mandrel 4 under the action of the transmission mechanism and the internal gear 51, and the planar motion comprises rotation and revolution around the axis of the mandrel;

a motion decomposition mechanism is also installed in the inner cavity of the gear box, consists of a floating disc 7 and a pin column and is used for decomposing the trend of planar motion of the planetary gear 8 into motions in the X direction and the Y direction which are vertical to each other, and the X direction and the Y direction are both positioned on a plane vertical to the mandrel 4; the gear box body 1 is provided with an upper mounting cavity 1b and a lower mounting cavity 1c, a bearing surface 1a is arranged between the upper mounting cavity 1b and the lower mounting cavity 1c, the upper mounting cavity 1b is adaptive to the floating disc 7, so that the floating disc 7 is arranged in the upper mounting cavity 1b and is located on the bearing surface 1a, and the floating disc 7 can slide on the bearing surface 1a along the Y direction; the floating disc 7 is provided with a guide sliding chute 72 extending along the X direction, the upper end of a pin is assembled with a pin mounting hole arranged on the planetary gear 8 in an interference fit manner, and the lower end of the pin is slidably arranged in the guide sliding chute 72 of the floating disc 7;

the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, and the second transmission mechanism consists of a gear 3, an eccentric shaft 6 and a bearing; the eccentric shaft 6 is composed of an upper eccentric column 62 and a lower eccentric disc 63, the eccentric shaft 6 is provided with a central hole 61 penetrating the eccentric column 62 and the eccentric disc 63, the axis of the central hole 61 is parallel to the axis of the eccentric column 62, and the eccentricity of the central hole 61 relative to the eccentric column 62 is equal to the center distance between the planetary gear 8 and the internal gear 51; the gear 3 is injected on the eccentric disc 63, so that the eccentric disc 63 is fixed with the molded gear 3, and the gear 3 is provided with the balance hole 31 for balancing, so that the center of mass of the gear 3 is on the rotation axis of the gear 3, as shown in fig. 3, in other embodiments, the purpose of enabling the center of mass of the gear 3 to be on the rotation axis of the gear 3 can be achieved through other structures, as shown in fig. 7, grooves are respectively machined on the upper side surface and the lower side surface of the gear 3, and the grooves on the two side surfaces are not communicated; a bearing mounting hole is formed in the center of the planetary gear 8, a through hole 71 is formed in the center of the floating disc 7, the eccentric column 62 sequentially penetrates through the through hole 71 and the bearing mounting hole, and the bearing is mounted between the bearing mounting hole and the eccentric column 62; the gear 3 is arranged in the lower mounting cavity 1c, the mandrel 4 passes through the central hole 61 of the eccentric shaft 6 and is in clearance fit with the central hole 61, and the axis of the mandrel 4 is superposed with the rotation axis of the gear 3; the external motor drives the gear 3 to rotate through the first transmission mechanism; the first transmission mechanism is a worm 2 meshed with the gear 3, and the worm 2 is installed in the worm installation hole 12.

The upper installation cavity 1b and the lower installation cavity 1c form an installation cavity of the gear box body, and the installation end face 11 is arranged at the bottom of the lower installation cavity 1 c. The utility model discloses a concrete structure and theory of operation can be seen in utility model "a reduction gear for car seat lift driver" that the bulletin number is CN207583940U, and it is no longer repeated here.

The utility model discloses well mounting end face 11 has seted up axle mounting hole 13, axle mounting hole 13 is used for installing the one end of dabber 4, make dabber 4 can be relative axle mounting hole 13 and rotate around the central line of axle mounting hole 13, dabber 4 and 5 interference fit of output gear, mounting end face 11 has certain supporting role to parts such as the eccentric shaft 6 that are located it, and the lower terminal surface of eccentric shaft 6 contacts and can rotate relatively with mounting end face 11, for reducing the coefficient of friction between eccentric shaft 6 and the mounting end face 11, as shown in fig. 8, mounting end face 11 is provided with the oil storage tank that is used for holding lubricating oil, specifically be equipped with a plurality of protruding 111 on mounting end face 11, protruding 111's shape can be the hemisphere, the interval sets up between a plurality of protruding 111 and the mounting end face 11 and makes and constitute the oil storage tank. The contact area of the eccentric shaft 6 and the mounting end surface 11 in the relative rotation process is reduced, and the friction coefficient between the eccentric shaft and the mounting end surface is further reduced by applying lubricating oil in the oil storage groove.

In other embodiments, the spindle 4 may be fixedly connected to the shaft mounting hole 13, so that the spindle 4 and the output gear 5 rotate relatively.

Example two

The difference between this embodiment and the first embodiment lies in the structural design of the mounting end surface 11 of the gear housing 1, as shown in fig. 9, the oil storage groove is three linear grooves 112 formed in the mounting end surface 11, and the linear grooves 112 are used for storing the lubricating oil coated thereon. The straight grooves 112 are uniformly arranged at intervals around the central line of the shaft mounting hole 13. The rest of the technical contents are the same as the first embodiment.

EXAMPLE III

The difference between the first embodiment and the second embodiment lies in the structural design of the mounting end surface 11 of the gear housing 1, as shown in fig. 10, the oil storage groove is two annular grooves 113 formed in the mounting end surface 11, the annular grooves 113 are used for storing lubricating oil coated thereon, and the center of the annular grooves 113 is located on the center line of the shaft mounting hole 13.

In other embodiments, the structures and the numbers of the protrusions 111, the linear grooves 112 and the circular grooves 113 can be adjusted appropriately, so that the purpose of uniformly distributing the lubricating oil on the mounting end surface 11 can be achieved, that is, the friction coefficient between the mounting end surface 11 and the part contacting with the mounting end surface can be reduced.

The above embodiments of the present invention are not right the utility model discloses the limited scope of protection, the utility model discloses an embodiment is not limited to this, makes all kinds of basis according to the above-mentioned of the utility model discloses an above-mentioned content, according to ordinary technical knowledge and the conventional means in this field, is not deviating from the utility model discloses under the above-mentioned basic technical thought prerequisite, right the modification, the replacement or the change of other multiple forms that the above-mentioned structure made all should fall within the protection scope of the utility model discloses an.

Claims

1. The utility model provides an oil storage type gear box, is equipped with the installation cavity that is used for installing transmission assembly, the bottom of installation cavity has one and is used for supporting transmission assembly's mounting surface (11), a axle mounting hole (13) have been seted up downwards on mounting surface (11), its characterized in that, mounting surface (11) are provided with the oil storage tank that is used for holding lubricating oil.

2. The oil-storing type gear box according to claim 1, wherein the mounting end surface (11) is provided with a plurality of protrusions (111), and the plurality of protrusions (111) are spaced apart from each other, so that the oil reservoir is formed between the plurality of protrusions (111) and the mounting end surface (11).

3. The oil storing type gear box according to claim 1, wherein said oil storing groove is a plurality of linear grooves (112) formed in said mounting end surface (11), each of said linear grooves (112) extending in a radial direction of said shaft mounting hole (13).

4. The oil storage type gear box body according to claim 3, characterized in that the mounting end surface (11) is provided with three linear grooves (112), and the three linear grooves (112) are uniformly spaced around the center line of the shaft mounting hole (13).

5. The oil-storing type gear box according to claim 1, wherein the oil-storing groove is a plurality of annular grooves (113) formed in the mounting end surface (11), and the center of each annular groove (113) is located on the center line of the shaft mounting hole (13).

6. The oil storage type gear box body according to claim 5, wherein the mounting end surface (11) is provided with two annular grooves (113).

7. The oil storage type gearbox casing according to any one of claims 1 to 6, wherein the mounting cavity comprises an upper mounting cavity (1b) and a lower mounting cavity (1c), a bearing surface (1a) is arranged between the upper mounting cavity (1b) and the lower mounting cavity (1c), and the mounting end surface (11) is arranged at the bottom of the lower mounting cavity (1 c).

8. The utility model provides a reduction gear of car seat riser, is equipped with gear box (1) and gear box lid (9) that can make up and form the gear box inner chamber, just install drive mechanism, planetary gear (8) and output gear (5) in the gear box inner chamber, gear box (1) is provided with dabber (4), output gear (5) are equipped with internal gear (51) and drive gear (52) that are used for exporting power, output gear (5) rotate install on dabber (4) and make internal gear (51), drive gear (52) and dabber (4) are coaxial, planetary gear (8) with internal gear (51) mesh and constitute few tooth difference planetary gear pair, just drive mechanism can transmit the power of external motor output for planetary gear (8), make planetary gear (8) are in under the effect of drive mechanism and internal gear (51), the plane movement is tended to be carried out on a plane which is vertical to the mandrel (4), and the plane movement comprises rotation and revolution around the axis of the mandrel (4);

the inner cavity of the gear box is also provided with a motion decomposition mechanism, the motion decomposition mechanism consists of a floating disc (7) and a pin column and is used for decomposing the trend of the planar motion of the planetary gear (8) into the motions in the X direction and the Y direction which are vertical to each other, and the X direction and the Y direction are both positioned on the plane; the gearbox casing (1) is provided with an upper mounting cavity (1b) and a lower mounting cavity (1c), a bearing surface (1a) is arranged between the upper mounting cavity (1b) and the lower mounting cavity (1c), the upper mounting cavity (1b) is matched with the floating disc (7), so that the floating disc (7) is arranged in the upper mounting cavity (1b) and is located on the bearing surface (1a), and the floating disc (7) can slide on the bearing surface (1a) along the Y direction; the floating disc (7) is provided with a guide sliding groove (72) extending along the X direction, the upper end of the pin is assembled with a pin mounting hole formed in the planetary gear (8) in an interference fit manner, and the lower end of the pin is slidably mounted in the guide sliding groove (72) of the floating disc (7);

the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, and the second transmission mechanism consists of a gear (3), an eccentric shaft (6) and a bearing; the eccentric shaft (6) is composed of an upper eccentric column (62) and a lower eccentric disc (63), the eccentric shaft (6) is provided with a middle hole (61) penetrating through the eccentric column (62) and the eccentric disc (63), the axis of the middle hole (61) is parallel to the axis of the eccentric column (62), and the eccentric distance of the middle hole (61) relative to the eccentric column (62) is equal to the central distance between the planetary gear (8) and the internal gear (51); the gear (3) is injected on the eccentric disc (63) so that the eccentric disc (63) is fixed with the molded gear (3), and the gear (3) is provided with a balance hole (31) for balancing so that the center of mass of the gear (3) is on the rotation axis of the gear; a bearing mounting hole is formed in the center of the planetary gear (8), a through hole (71) is formed in the center of the floating disc (7), the eccentric column (62) sequentially penetrates through the through hole (71) and the bearing mounting hole, and the bearing is mounted between the bearing mounting hole and the eccentric column (62); the gear (3) is arranged in the lower mounting cavity (1c), the mandrel (4) penetrates through a central hole (61) of the eccentric shaft (6) and is in clearance fit with the central hole (61), and the axis of the mandrel (4) is coincident with the revolution axis of the gear (3); the external motor drives the gear (3) to rotate through the first transmission mechanism;

the method is characterized in that:

the gearbox housing (1) is the oil storage type gearbox housing according to any one of claims 1 to 6, the upper mounting cavity (1b) and the lower mounting cavity (1c) form a mounting cavity of the oil storage type gearbox housing, the mounting end surface (11) is arranged at the bottom of the lower mounting cavity (1c), the mandrel (4) is mounted in the shaft mounting hole (13), the eccentric shaft (6) is the transmission assembly according to any one of claims 1 to 6, and the mounting end surface (11) is used for supporting the eccentric shaft (6).