A vehicle seat lifting actuator capable of withstanding instantaneous high load impact

Abstract

The present invention discloses a vehicle seat lifting driver capable of withstanding instantaneous high-load impacts. The driver adopts a structure with a small tooth difference, and provides two metal inserts that are wrapped and fixed by an injection-molded structure portion of a gear housing. A pair of floating plate sliders of the floating plate are respectively slidably installed in the insert slide grooves of the two metal inserts and can slide relatively along the Y direction. The driver can prevent the floating plate from breaking the plastic gear housing when an accident such as a collision or rollover occurs in the vehicle, resulting in an extremely high instantaneous load on the seat lifting driver. In addition, the present invention does not require the use of components that are difficult to manufacture, nor does it require the enlargement and weight-increasing of the gear housing, and can still use a plastic gear housing that is light in weight and compact in structure. Therefore, the present invention can simultaneously take into account the performance advantages of withstanding instantaneous high-load impacts, being easy to manufacture, and being small in size and light in weight.

Description

Technical Field

[0001] The invention relates to a seat lifting driver, in particular to a vehicle seat lifting driver capable of withstanding instantaneous high load impact. Background Art

[0002] The function of the vehicle seat lifting drive is to use electric energy to drive the motor, then reduce speed and increase torque through the internal transmission components, and finally output it through the output gear, driving the corresponding mechanism on the vehicle seat (mainly in the form of a gear plate-four-bar linkage) to achieve seat lifting and lowering adjustment.

[0003] As the core component of a vehicle seat, in addition to being able to achieve the lifting and adjusting functions, its reliability is even more important. In particular, when a vehicle collides, rolls over, and other accidents occur, the instantaneous load on the driver is extremely high. At this time, the driver is required to have a high instantaneous high load tolerance to prevent the driver from breaking and injuring passengers.

[0004] Chinese invention patent CN207583940U discloses a reducer for a car seat lifting driver, which adopts a gearbox structure with a small tooth difference structure, and has the advantages of high transmission efficiency, compact structure, small size and light weight. However, the seat lifting driver with a small tooth difference structure has the following problems: when a collision, rollover or other accidents occur in a vehicle, resulting in an extremely high instantaneous load on the seat lifting driver, the load on the output gear will be transmitted to the floating plate through the planetary gear and the pin, so that the floating plate is subjected to force and has a tendency to rotate, and then the floating plate will generate a force in the X direction and in the opposite direction of the X direction on the plastic gear box body. When the instantaneous load loaded on the seat lifting driver is large enough, the positive and negative X-direction forces of the floating plate on the plastic gear box body will also be large enough to cause the plastic gear box body to break.

[0005] In the prior art, a gearbox structure with a small tooth difference structure is adopted, and a variety of solutions are proposed to solve the above problems, but they all have corresponding shortcomings, such as:

[0006] US patent application US20130333496A1 heat treats the floating plate in different regions or adopts a combined design to achieve that the hardness of the boss regions on both sides of the floating plate is less than that of the middle region, so that when subjected to instantaneous load, the elastic deformation of the floating plate itself can offset part of the load, thereby preventing the plastic gearbox from breaking. However, the floating plate of this solution requires complicated processes and is not easy to manufacture.

[0007] European patent application EP1728005B1 uses a plastic housing part, a metal flange housing part and a plastic housing part to form a three-layer sandwich gear housing through bolts, and uses the larger metal flange housing part to provide a sliding groove for the floating plate, and then connects the metal flange housing part to the side plate of the car seat, so that when subjected to instantaneous load, the force of the floating plate is transmitted to the side plate of the car seat through the metal flange housing part, and the force transmission path and the high strength of the metal flange housing part itself are used to prevent the plastic housing part from breaking. However, this solution will increase the volume and weight of the gear box. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a vehicle seat lifting drive that can withstand instantaneous high-load impacts, so as to solve the problem in the prior art that the seat lifting drive using a small tooth difference structure has difficulty in balancing the tolerance to instantaneous high-load impacts, manufacturing convenience, and volume and weight.

[0009] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0010] A vehicle seat lifting driver capable of withstanding instantaneous high-load impacts comprises a motor, a gearbox cover and a plastic gearbox body, wherein a transmission mechanism, an output gear, a planetary gear, a floating plate and a core shaft extending in the Z direction are installed in the gearbox inner cavity formed by the combination of the gearbox cover and the gearbox body, wherein the output gear is coaxially provided with an internal gear and a driving gear for outputting power, wherein the output gear is coaxially installed on the core shaft, wherein the planetary gear meshes with the internal gear and forms a planetary gear pair with a small tooth difference, and wherein the core shaft passes through the center hole of the planetary gear, wherein the motor can drive the planetary gear to rotate and revolve around the axis of the core shaft simultaneously through the transmission mechanism; and wherein the gearbox body is provided with an upper mounting cavity, wherein the floating plate is installed in the upper mounting cavity and can slide relatively in the Y direction, wherein the floating plate is provided with a guide slot extending in the X direction, wherein the planetary gear is provided with a pin, wherein the pin is slidably matched with the guide slot; wherein the X direction, the Y direction and the Z direction are mutually perpendicular in pairs;

[0011] The motor can drive the planetary gear to rotate and revolve around the axis of the core shaft simultaneously through the transmission mechanism, so that the planetary gear can drive the output gear meshing with it to rotate, so as to output power through the driving gear. Due to the action of the floating plate and the pin, the movement of the planetary gear drives the pin to slide back and forth in the guide groove along the X direction relative to the floating plate, and drives the floating plate to slide back and forth in the upper mounting cavity along the Y direction relative to the gear box body, thereby enabling the power transmitted to the planetary gear by the motor through the transmission mechanism to be more effectively transmitted to the output gear.

[0012] Among them, the above-mentioned transmission mechanism preferably adopts: a first transmission mechanism composed of a worm, and a second transmission mechanism composed of a gear and an eccentric shaft. The specific connection structure and working principle of the transmission mechanism can be found in Chinese utility model patent CN207583940U.

[0013] Features:

[0014] The gear housing is provided with two metal inserts in the upper mounting cavity by insert injection molding, so that the injection molding structure of the gear housing wraps and fixes the metal inserts; the metal insert is provided with an insert slide groove extending along the Y direction, and the floating plate is provided with a pair of floating plate sliders symmetrically arranged with respect to the guide slide groove, and the pair of floating plate sliders are respectively slidably installed in the insert slide grooves of the two metal inserts and can slide relative to each other along the Y direction.

[0015] Thus, when the present invention is working normally, through the sliding cooperation of the floating plate slider and the insert groove, the floating plate can slide relatively along the Y direction in the upper mounting cavity relative to the gear housing, thereby ensuring the normal operation of the seat lifting drive, so that the power transmitted to the planetary gear by the motor through the transmission mechanism can be more effectively transmitted to the output gear; and, because the metal insert is much more wear-resistant than the plastic gear housing, the durability of the present invention can be effectively improved.

[0016] When a vehicle collides, rolls over, or other accidents occur, causing the instantaneous load on the seat lift actuator to be extremely high, the load on the output gear will be transmitted to the floating plate through the planetary gear and the pin, causing the floating plate to be subjected to force and to have a tendency to rotate. Since the floating plate is only indirectly in contact with the gear housing through a floating plate slider that slides with the insert groove of the metal insert, the force generated by the rotation of the floating plate will not directly act on the plastic gear housing, but a pair of floating plate sliders of the floating plate will respectively generate a positive impact force along the X direction and a reverse impact force in the opposite direction of the X direction on the two metal inserts, and the positive impact When the force and the reverse impact force act on the gear housing through the two metal inserts respectively, they are dispersed by the injection molding structure that partially wraps and fixes the metal inserts, effectively preventing the floating plate from breaking the plastic gear housing; therefore, the present invention can withstand instantaneous high-load impacts and prevent the plastic gear housing from breaking when the driver is subjected to instantaneous high-load impacts; and, the present invention does not need to use components that are difficult to manufacture, nor does it need to increase the weight of the gear housing, and can still use a light-weight, compact plastic gear housing, therefore, it can simultaneously take into account the performance advantages of withstanding instantaneous high-load impacts, good manufacturing convenience, and small size and light weight.

[0017] Preferably, the metal insert is provided with two insert slide grooves arranged at intervals, and the floating plate is provided with two pairs of floating plate sliders, which are respectively slidably installed in the two insert slide grooves of the two metal inserts. Therefore, when a collision, rollover or other accidents occur in the vehicle, resulting in an extremely high instantaneous load on the seat lift actuator, causing the floating plate to be subjected to force and produce a tendency to rotate, the four floating plate sliders of the floating plate respectively have four contact surfaces with the two metal inserts, so that the positive impact force and the reverse impact force are further dispersed when they act on the gear housing through the two metal inserts, which can more effectively prevent the floating plate from breaking the plastic gear housing.

[0018] Preferably: the metal insert is composed of an insert bottom plate, a first insert boss, a second insert boss, and a third insert boss; the first insert boss, the second insert boss, and the third insert boss are arranged at intervals on the top surface of the insert bottom plate along the X direction, and the metal insert is provided with at least one insert through hole extending along the Z direction and penetrating the insert bottom plate and the second insert boss; the interval space between the first insert boss and the second insert boss, and the interval space between the second insert boss and the third insert boss are the two insert slide grooves;

[0019] The gear housing is used to partially wrap and fix the injection molding structure of the metal insert, including: a base plate serving as the bottom surface of the upper mounting cavity, a first side plate, a second side plate and a third side plate located on the top surface of the base plate and connected in sequence, and columns located on the top surface of the base plate and corresponding in number to the insert through holes; the insert bottom plate is seated on the base plate, the first side plate and the third side plate are respectively tightly attached to the outer side surfaces of the first insert boss and the outer side surfaces of the third insert boss, and the first side plate, the second side plate and the third side plate are all provided with bumps (respectively recorded as bumps 1-21, bumps 1-31 and bumps 1-41), and the three bumps are respectively abutted against the top surfaces of the first insert boss, the second insert boss and the third insert boss; the columns are embedded in the corresponding insert through holes.

[0020] Therefore, the injection molding structure can greatly improve the dispersion effect of the impact force of the floating plate on the gear housing through the two metal inserts, so as to further reduce the risk of the gear housing being broken due to the load transferred by the floating plate when the vehicle collides, rolls, etc.

[0021] Preferably, at least one of the columns is connected to the protrusion of the second side plate to better achieve the above-mentioned effect of dispersing the impact force.

[0022] Preferably, the metal insert is made of powder metallurgy (oil-permeable), which can provide a self-lubricating function to reduce wear on the floating disc and reduce the weight of the metal insert.

[0023] As a preferred embodiment of the present invention: an oil storage cavity is provided on the top surface of the planetary gear, and lubricating grease is stored in the oil storage cavity; the center hole of the planetary gear is a stepped hole composed of a large-diameter upper hole and a small-diameter lower hole, and the large-diameter upper hole is connected to the oil storage cavity; and a bearing is installed in the center hole of the planetary gear, and the bearing is composed of a sleeve portion embedded in the small-diameter lower hole and an outer flange portion embedded in the large-diameter upper hole, so that the outer flange portion partially covers the upper port of the oil storage cavity, and the upper port portion of the oil storage cavity not covered by the outer flange portion serves as an oil outlet.

[0024] Thus, during the movement of the planetary gears rotating on themselves and revolving around the axis of the core shaft at the same time, under the action of gravity and centrifugal force, the lubricating grease in the oil storage cavity can be discharged from the oil outlet, forming an oil film between the upper surface of the planetary gear and the parts in contact with the upper surface, so as to reduce wear and improve the working efficiency of the lifting drive; moreover, since the planetary gears and the internal gears are structures with a small tooth difference, the lubricating grease discharged from the oil outlet can cover most areas of the upper surface of the planetary gears, thereby improving the lubrication effect.

[0025] The speed of discharging the lubricating grease from the oil outlet can be controlled by the size of the oil outlet, and the size control can be conveniently achieved by adjusting the covering area of ​​the outer flange portion on the oil storage cavity.

[0026] Wherein, when the structure described in the following embodiment 3 is adopted, the component in contact with the upper surface of the planetary gear is the metal gasket; and if the rubber gasket and the metal gasket described in the following embodiment 3 are not provided, but the upper surface of the planetary gear is in direct contact with the inner end surface of the output gear, then the component in contact with the upper surface of the planetary gear is the inner end surface of the output gear.

[0027] In addition, the outer flange of the bearing can also prevent the bearing from falling off or falling off the planetary gear.

[0028] Preferably, the bottom surface of the oil storage cavity is inclined downward from the outside to the inside along the radial direction of the planetary gear to facilitate the discharge of lubricating grease from the oil outlet.

[0029] Preferably: the pin is a convex column extruded from the bottom surface of the planetary gear by a cold extrusion process or a fine stamping process, and the oil storage cavity is formed above the pin during the cold extrusion process or the fine stamping process to facilitate the processing and forming of the pin, the planetary gear and the oil storage cavity.

[0030] As a preferred embodiment of the present invention: a rubber gasket and a metal gasket are provided between the top surface of the planetary gear and the inner end surface of the output gear, the metal gasket is provided with gasket teeth meshing with the internal gear, and the metal gasket is in contact with the top surface of the planetary gear.

[0031] Thus, by using the rubber gasket and the metal gasket, the distance between the top surface of the planetary gear and the inner end surface of the output gear can be positioned, thereby preventing the planetary gear from moving in the Z direction during the simultaneous rotation and revolution around the axis of the core shaft; moreover, the metal gasket is meshed with the internal gear through the gasket teeth, thereby preventing the metal gasket from rotating while preventing the rubber gasket from rotating, thereby preventing the rubber gasket from deforming and wearing due to rotation; moreover, the metal gasket can prevent the bearing from falling out upward; therefore, the working reliability of the planetary gear can be ensured by using the rubber gasket and the metal gasket.

[0032] As a preferred embodiment of the present invention: the gear box cover and the gear box body are connected by bolts, and the gear box cover is provided with two symmetrically arranged notches, and the gear box body is provided with two positioning bosses, and the two positioning bosses are respectively embedded in the two notches of the gear box cover.

[0033] Therefore, on the one hand, it can provide positioning for the gear box cover to be installed on the gear box body, and on the other hand, it can provide the gear box cover with good anti-rotation performance.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] First, the present invention is directed to a seat lifting driver that adopts a structure with a small tooth difference. By providing two metal inserts that are wrapped and fixed by the injection-molded structure portion of the gear housing, and slidingly installing a pair of floating plate sliders of the floating plate in the insert slide grooves of the two metal inserts respectively and being able to slide relatively along the Y direction, the present invention can prevent the floating plate from breaking the plastic gear housing when an accident such as a collision or rollover occurs in a vehicle, resulting in an extremely high instantaneous load on the seat lifting driver. Furthermore, the present invention does not require the use of components that are difficult to manufacture, nor does it require the enlargement and weight increase of the gear housing, and can still use a light-weight, compact plastic gear housing. Therefore, the present invention can simultaneously take into account the performance advantages of withstanding instantaneous high-load impacts, being easy to manufacture, and being small in size and light in weight.

[0036] Second, the present invention adopts a metal insert composed of an insert base plate, a first insert boss, a second insert boss, and a third insert boss, and adopts an injection molding structure including a base plate, a first side plate, a second side plate, a third side plate and a column to partially wrap and fix the metal insert, which can greatly improve the dispersion effect of the impact force of the floating plate on the gear box body through the two metal inserts, so as to further reduce the risk of the gear box body being broken due to the load transferred by the floating plate when the vehicle collides, rolls over, and other accidents.

[0037] Thirdly, the present invention forms an oil outlet by arranging an oil storage cavity on the top surface of the planetary gear and partially covering the upper port of the oil storage cavity with the outer flange of the bearing. During the movement of the planetary gear, the lubricating grease discharged from the oil outlet can be used to form an oil film between the upper surface of the planetary gear and the parts in contact with the upper surface, so as to reduce wear and improve the working efficiency of the lifting drive. The present invention has the advantages of simple structure and easy processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0039] Figure 1 It is a structural schematic diagram of a vehicle seat lifting and lowering driver of the present invention;

[0040] Figure 2 It is a schematic diagram of the structure explosion of the vehicle seat lifting and lowering actuator of the present invention;

[0041] Figure 3 It is a schematic diagram of the assembly of the gear housing 1, the floating plate 5, and the metal insert 14 in the present invention;

[0042] Figure 4 It is a schematic diagram of the structure explosion of the gear housing 1 and the metal insert 14 in the present invention;

[0043] Figure 5 for Figure 3 AA section view;

[0044] Figure 6 for Figure 3 BB cross-sectional view;

[0045] Figure 7 It is a schematic diagram of the assembly of the planetary gear 7 and the bearing 8 in the present invention;

[0046] Figure 8 It is a schematic diagram of the structure explosion of the planetary gear 7 and the bearing 8 in the present invention;

[0047] Fig. 9 It is a cross-sectional view of the planetary gear 7 and the bearing 8 in the present invention;

[0048] Fig.10It is a schematic diagram of the structure explosion of the output gear 11, the rubber gasket 15 and the metal gasket 16 in the present invention;

[0049] Fig.11 It is a cross-sectional view of the output gear 11, the rubber gasket 15, the metal gasket 16, the planetary gear 7 and the bearing 8 in the present invention. DETAILED DESCRIPTION

[0050] The present invention is described in detail below in conjunction with the embodiments and the accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the protection scope of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative work without departing from the inventive concept of the present invention belong to the protection scope of the present invention.

[0051] Embodiment 1

[0052] like Figures 1 to 6 As shown, the present invention discloses a vehicle seat lifting driver capable of withstanding instantaneous high load impact, comprising a motor 13, a gear box cover 12 and a plastic gear box body 1, wherein a transmission mechanism, an output gear 11, a planetary gear 7, a floating plate 5 and a spindle 9 extending in the Z direction are installed in the gear box inner cavity formed by the combination of the gear box cover 12 and the gear box body 1, wherein the output gear 11 is coaxially provided with an internal gear 111 and a driving gear 112 for outputting power, wherein the output gear 11 is coaxially installed on the spindle 9, wherein the planetary gear 7 meshes with the internal gear 111 and forms a planetary gear pair with a small tooth difference, and the spindle 9 passes through the center of the planetary gear 7. Hole 71, the motor 13 can drive the planetary gear 7 to rotate and revolve around the axis of the core shaft 9 simultaneously through the transmission mechanism; and the gear box body 1 is provided with an upper mounting cavity 1b, the floating plate 5 is installed in the upper mounting cavity 1b and can slide relatively along the Y direction, and the floating plate 5 is provided with a guide groove 52 extending along the X direction, and the planetary gear 7 is provided with a pin 6, which is slidably matched with the guide groove 52; the X direction, Y direction, and Z direction are perpendicular to each other; wherein the core shaft 9 can be fixed to the gear box body 1 as in the Chinese utility model patent CN207583940U, and can also be fixed to the output gear 11.

[0053] The motor 13 can drive the planetary gear 7 to rotate and revolve around the axis of the core shaft 9 simultaneously through the transmission mechanism, so that the planetary gear 7 can drive the output gear 11 meshing with it to rotate, so as to output power through the driving gear 112. Due to the action of the floating plate 5 and the pin 6, the movement of the planetary gear 7 drives the pin 6 to slide back and forth along the X direction in the guide groove 52 relative to the floating plate 5, and drives the floating plate 5 to slide back and forth along the Y direction in the upper mounting cavity 1b relative to the gear box body 1, thereby enabling the power transmitted to the planetary gear 7 by the motor 13 through the transmission mechanism to be more effectively transmitted to the output gear 11.

[0054] Among them, the above-mentioned transmission mechanism preferably adopts: a first transmission mechanism composed of a worm 2, and a second transmission mechanism composed of a gear 3 and an eccentric shaft 4. The specific connection structure and working principle of the transmission mechanism can be found in Chinese utility model patent CN207583940U.

[0055] The gear housing 1 is provided with two metal inserts 14 in the upper mounting cavity 1b by insert injection molding, so that the injection molding structure of the gear housing 1 partially wraps and fixes the metal inserts 14; the metal insert 14 is provided with an insert slide groove 14a extending along the Y direction, and the floating plate 5 is provided with a pair of floating plate sliders 54 symmetrically arranged about the guide slide groove 52, and the pair of floating plate sliders 54 are respectively slidably installed in the insert slide grooves 14a of the two metal inserts 14 and can slide relative to each other along the Y direction.

[0056] Thus, when the present invention is working normally, through the sliding cooperation of the floating plate slider 54 and the insert groove 14a, the floating plate 5 can slide relative to the gear box body 1 along the Y direction in the upper mounting cavity 1b, ensuring the normal operation of the seat lifting drive, so that the power transmitted to the planetary gear 7 by the motor 13 through the transmission mechanism can be more effectively transmitted to the output gear 11; moreover, because the metal insert 14 is much more wear-resistant than the plastic gear box body 1, the durability of the present invention can be effectively improved.

[0057] When the vehicle collides, rolls over, or other accidents occur, causing the instantaneous load on the seat lift drive to be extremely high, the load on the output gear 11 will be transmitted to the floating plate 5 through the planetary gear 7 and the pin 6, causing the floating plate 5 to be subjected to force and have a tendency to rotate. Since the floating plate 5 is only indirectly in contact with the gear housing 1 through the floating plate slider 54 that slides with the insert groove 14a of the metal insert 14, the force generated by the rotation of the floating plate 5 will not directly act on the plastic gear housing 1, but a pair of floating plate sliders 54 of the floating plate 5 will respectively generate a positive impact force F along the X direction and a reverse impact force F' in the opposite direction of the X direction on the two metal inserts 14. When the forward impact force F and the reverse impact force F' act on the gear case 1 through the two metal inserts 14 respectively, they are dispersed by the injection molding structure that partially wraps and fixes the metal inserts 14, effectively preventing the floating plate 5 from breaking the plastic gear case 1; therefore, the present invention can withstand instantaneous high-load impacts and prevent the plastic gear case 1 from breaking when the driver is subjected to instantaneous high-load impacts; and, the present invention does not need to use components that are difficult to manufacture, nor does it need to increase the weight of the gear case 1, and can still use a light-weight, compact plastic gear case, therefore, it can simultaneously take into account the performance advantages of withstanding instantaneous high-load impacts, good manufacturing convenience, and small size and light weight.

[0058] The above is a basic implementation of the first embodiment of the present invention, and further optimization, improvement and limitation can be made on the basis of the basic implementation:

[0059] Preferably, the metal insert 14 is provided with two insert slide grooves 14a arranged at intervals, and the floating plate 5 is provided with two pairs of floating plate sliders 54, which are respectively slidably installed in the two insert slide grooves 14a of the two metal inserts 14. Therefore, when a collision, rollover or other accidents occur in the vehicle, resulting in an extremely high instantaneous load on the seat lift actuator, causing the floating plate 5 to be subjected to force and produce a tendency to rotate, the four floating plate sliders 54 of the floating plate 5 have four contact surfaces with the two metal inserts 14, respectively, so that the positive impact force F and the reverse impact force F' are further dispersed when they act on the gear housing 1 through the two metal inserts 14, and can more effectively prevent the floating plate 5 from breaking the plastic gear housing 1.

[0060] Preferably: the metal insert 14 is composed of an insert base plate 14-1, a first insert boss 14-2, a second insert boss 14-3, and a third insert boss 14-4; the first insert boss 14-2, the second insert boss 14-3, and the third insert boss 14-4 are arranged on the top surface of the insert base plate 14-1 at intervals along the X direction, and the metal insert 14 is provided with at least one insert through hole 14b extending along the Z direction and penetrating the insert base plate 14-1 and the second insert boss 14-3; the interval space between the first insert boss 14-2 and the second insert boss 14-3, and the interval space between the second insert boss 14-3 and the third insert boss 14-4 are the two insert slide grooves 14a;

[0061] The gear housing 1 is used to partially wrap and fix the injection molding structure of the metal insert 14, including: a base plate 1-1 as the bottom surface of the upper mounting cavity 1b, a first side plate 1-2, a second side plate 1-3 and a third side plate 1-4 located on the top surface of the base plate 1-1 and connected in sequence, and a column 1-5 located on the top surface of the base plate 1-1 and corresponding in number to the insert through hole 14b; the insert bottom plate 14-1 is located on the base plate 1-1, and the first side plate 1-2 and the third side plate 1-4 are connected in sequence. 4 are respectively in close contact with the outer side surfaces of the first insert boss 14-2 and the outer side surfaces of the third insert boss 14-4, and the first side plate 1-2, the second side plate 1-3 and the third side plate 1-4 are all provided with protrusions (respectively denoted as protrusions 1-21, protrusions 1-31 and protrusions 1-41), and the three protrusions are respectively pressed against the top surfaces of the first insert boss 14-2, the second insert boss 14-3 and the third insert boss 14-4; the column 1-5 is embedded in the corresponding insert through hole 14b.

[0062] Therefore, through the above-mentioned injection molding structure, the dispersion effect of the impact force of the floating plate 5 on the gear box 1 through the two metal inserts 14 can be greatly improved, so as to further reduce the risk of the gear box 1 being broken due to the load transferred by the floating plate 5 when the vehicle collides, rolls, etc.

[0063] Preferably, at least one of the columns 1-5 is connected to the protrusion of the second side plate 1-3 to better achieve the above-mentioned dispersion effect of the impact force.

[0064] Preferably, the metal insert 14 is made of powder metallurgy (oil-permeable), which can provide a self-lubricating function to reduce the wear on the floating plate 5 and reduce the weight of the metal insert 14 .

[0065] Embodiment 2

[0066] On the basis of the above-mentioned embodiment 1, this embodiment 2 also adopts the following preferred structure:

[0067] like Figures 7 to 9 As shown, the top surface of the planetary gear 7 is provided with an oil storage cavity 7a, in which lubricating grease is stored; the center hole 71 of the planetary gear 7 is a stepped hole composed of a large-diameter upper hole 71a and a small-diameter lower hole 71b, and the large-diameter upper hole 71a is connected to the oil storage cavity 7a; and a bearing 8 is installed in the center hole 71 of the planetary gear 7, and the bearing 8 is composed of a sleeve portion 8-1 embedded in the small-diameter lower hole 71b and an outer flange portion 8-2 embedded in the large-diameter upper hole 71a, so that the outer flange portion 8-2 partially covers the upper port of the oil storage cavity 7a, and the upper port portion of the oil storage cavity 7a not covered by the outer flange portion 8-2 serves as an oil outlet 7a1.

[0068] Thus, during the movement of the planetary gear 7 rotating on itself and revolving around the axis of the core shaft 9 at the same time, the lubricating grease in the oil storage cavity 7a can be discharged from the oil outlet 7a1 under the action of gravity and centrifugal force, forming an oil film between the upper surface of the planetary gear 7 and the parts in contact with the upper surface, so as to reduce wear and improve the working efficiency of the lifting drive; moreover, since the planetary gear 7 and the internal gear 111 are a structure with a small tooth difference, the lubricating grease discharged from the oil outlet 7a1 can cover most of the upper surface area of ​​the planetary gear 7, thereby improving the lubrication effect.

[0069] The speed of discharging the lubricating grease from the oil outlet 7a1 can be controlled by the size of the oil outlet 7a1, and the size control can be conveniently achieved by adjusting the covering area of ​​the outer flange portion 8-2 on the oil storage cavity 7a.

[0070] When the structure described in the third embodiment is adopted, the component in contact with the upper surface of the planetary gear 7 is the metal gasket 16; and if the rubber gasket 15 and the metal gasket 16 described in the third embodiment are not provided, and the upper surface of the planetary gear 7 is in direct contact with the inner end surface 11a of the output gear 11, the component in contact with the upper surface of the planetary gear 7 is the inner end surface 11a of the output gear 11.

[0071] In addition, the outer flange portion 8 - 2 of the bearing 8 can also prevent the bearing 8 from falling off or coming off the planetary gear 7 .

[0072] The above is a basic implementation of the second embodiment, and further optimization, improvement and limitation can be made on the basis of the basic implementation:

[0073] Preferably, the bottom surface 7a2 of the oil storage cavity 7a is inclined downward from the outside to the inside along the radial direction of the planetary gear 7 to facilitate the discharge of lubricating grease from the oil outlet 7a1.

[0074] Preferably: the pin 6 is a convex column extruded from the bottom surface of the planetary gear 7 by a cold extrusion process or a fine stamping process, and the oil storage cavity 7a is formed at the upper position of the pin 6 during the cold extrusion process or the fine stamping process to facilitate the processing and forming of the pin 6, the planetary gear 7, and the oil storage cavity 7a.

[0075] Embodiment 3

[0076] On the basis of the above-mentioned embodiment 1 or embodiment 2, this embodiment 3 also adopts the following preferred structure:

[0077] like Fig.10 and Fig.11 As shown, a rubber gasket 15 and a metal gasket 16 are provided between the top surface of the planetary gear 7 and the inner end surface 11a of the output gear 11. The metal gasket 16 is provided with a gasket tooth 16-1 meshing with the internal gear 111, and the metal gasket 16 is in contact with the top surface of the planetary gear 7.

[0078] Thus, by using the rubber gasket 15 and the metal gasket 16, the distance between the top surface of the planetary gear 7 and the inner end surface 11a of the output gear 11 can be positioned, so as to prevent the planetary gear 7 from moving in the Z direction during the simultaneous rotation and revolution around the axis of the core shaft 9; moreover, the metal gasket 16 is meshed with the internal gear 111 through the gasket teeth 16-1, so as to prevent the metal gasket 16 from rotating itself while preventing the rubber gasket 15 from rotating, thereby preventing the rubber gasket 15 from being deformed and worn due to rotation; moreover, the metal gasket 16 can prevent the bearing 8 from falling out upward; therefore, the working reliability of the planetary gear 7 can be ensured by using the rubber gasket 15 and the metal gasket 16.

[0079] Embodiment 4

[0080] Based on any one of the above embodiments 1 to 3, this embodiment 4 also adopts the following preferred structure:

[0081] like Figure 1 As shown, the gear box cover 12 and the gear box body 1 are connected by bolts, and the gear box cover 12 is provided with two symmetrically arranged notches 12a, and the gear box body 1 is provided with two positioning bosses 1-6, and the two positioning bosses 1-6 are respectively embedded in the two notches 12a of the gear box cover 12.

[0082] Therefore, on the one hand, it can provide positioning for the gear box cover 12 to be installed on the gear box body 1, and on the other hand, it can provide the gear box cover 12 with good anti-rotation performance.

[0083] The present invention is not limited to the above-mentioned specific implementation modes. According to the above-mentioned contents, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the present invention, the present invention can also make other various forms of equivalent modifications, replacements or changes, all of which fall within the protection scope of the present invention.

Claims

1. A vehicle seat lifting driver capable of withstanding instantaneous high load impact, comprising a motor (13), a gear box cover (12) and a plastic gear box body (1); a transmission mechanism, an output gear (11), a planetary gear (7), a floating plate (5) and a core shaft (9) extending in the Z direction are installed in the gear box inner cavity formed by the combination of the gear box cover (12) and the gear box body (1); the output gear (11) is coaxially provided with an internal gear (111) and a driving gear (112) for outputting power; the output gear (11) is coaxially installed on the core shaft (9); the planetary gear (7) meshes with the internal gear (111) to form a small-tooth difference gear. A planetary gear pair, wherein the core shaft (9) passes through the center hole (71) of the planetary gear (7), and the motor (13) can drive the planetary gear (7) to simultaneously rotate and revolve around the axis of the core shaft (9) through the transmission mechanism; and the gear housing (1) is provided with an upper mounting cavity (1b), the floating plate (5) is installed in the upper mounting cavity (1b) and can slide relatively along the Y direction, and the floating plate (5) is provided with a guide groove (52) extending along the X direction, and the planetary gear (7) is provided with a pin (6), and the pin (6) is slidably matched with the guide groove (52); the X direction, the Y direction, and the Z direction are mutually perpendicular in pairs; Features: The gear housing (1) is provided with two metal inserts (14) in the upper mounting cavity (1b) by insert injection molding, so that the injection molding structure of the gear housing (1) partially wraps and fixes the metal inserts (14); the metal inserts (14) are provided with insert slide grooves (14a) extending along the Y direction, and the floating plate (5) is provided with a pair of floating plate sliders (54) symmetrically arranged with respect to the guide slide grooves (52), and the pair of floating plate sliders (54) are respectively slidably mounted in the insert slide grooves (14a) of the two metal inserts (14) and can slide relative to each other along the Y direction; The metal insert (14) is provided with two insert sliding grooves (14a) arranged at intervals, and the floating plate (5) is provided with two pairs of floating plate sliding blocks (54), and the two pairs of floating plate sliding blocks (54) are respectively slidably installed in the two insert sliding grooves (14a) of the two metal inserts (14); The metal insert (14) is composed of an insert base plate (14-1), a first insert boss (14-2), a second insert boss (14-3), and a third insert boss (14-4); the first insert boss (14-2), the second insert boss (14-3), and the third insert boss (14-4) are arranged on the top surface of the insert base plate (14-1) at intervals along the X direction, and the metal insert (14) is provided with at least one insert through hole (14b) extending along the Z direction and penetrating the insert base plate (14-1) and the second insert boss (14-3); the spacing space between the first insert boss (14-2) and the second insert boss (14-3), and the spacing space between the second insert boss (14-3) and the third insert boss (14-4) are the two insert slide grooves (14a); The gear housing (1) is used for partially wrapping and fixing the injection molding structure of the metal insert (14), comprising: a base plate (1-1) as the bottom surface of the upper mounting cavity (1b), a first side plate (1-2), a second side plate (1-3) and a third side plate (1-4) located on the top surface of the base plate (1-1) and connected in sequence, and columns (1-5) located on the top surface of the base plate (1-1) and corresponding in number to the insert through holes (14b); the insert bottom plate (14-1) is seated on the base plate (1-1), and the The first side plate (1-2) and the third side plate (1-4) are respectively tightly attached to the outer side surface of the first insert boss (14-2) and the outer side surface of the third insert boss (14-4), and the first side plate (1-2), the second side plate (1-3) and the third side plate (1-4) are all provided with protrusions, and the three protrusions are respectively pressed against the top surfaces of the first insert boss (14-2), the second insert boss (14-3) and the third insert boss (14-4); the column (1-5) is embedded in the corresponding insert through hole (14b).

2. The vehicle seat lifting actuator capable of withstanding instantaneous high load impact according to claim 1, characterized in that: At least one of the columns (1-5) is connected to the protrusion of the second side plate (1-3).

3. The vehicle seat lifting actuator capable of withstanding instantaneous high load impact according to claim 1, characterized in that: The metal insert (14) is made of powder metallurgy.

4. The vehicle seat lifting actuator capable of withstanding instantaneous high load impact according to any one of claims 1 to 3, characterized in that: The top surface of the planetary gear (7) is provided with an oil storage cavity (7a), in which lubricating grease is stored; the center hole (71) of the planetary gear (7) is a stepped hole consisting of a large-diameter upper hole (71a) and a small-diameter lower hole (71b), and the large-diameter upper hole (71a) is connected to the oil storage cavity (7a); and a bearing (8) is installed in the center hole (71) of the planetary gear (7), and the bearing (8) is composed of a shaft sleeve portion (8-1) embedded in the small-diameter lower hole (71b) and an outer flange portion (8-2) embedded in the large-diameter upper hole (71a), so that the outer flange portion (8-2) partially covers the upper port of the oil storage cavity (7a), and the upper port portion of the oil storage cavity (7a) not covered by the outer flange portion (8-2) serves as an oil outlet (7a1).

5. The vehicle seat lifting actuator capable of withstanding instantaneous high load impact according to claim 4, characterized in that: The bottom surface (7a2) of the oil storage cavity (7a) is inclined downward from the outside to the inside along the radial direction of the planetary gear (7).

6. The vehicle seat lifting actuator capable of withstanding instantaneous high load impact according to claim 4, characterized in that: The pin (6) is a convex column formed by extruding the planetary gear (7) on the bottom surface of the planetary gear (7) through a cold extrusion process or a fine stamping process, and the oil storage cavity (7a) is formed at a position above the pin (6) during the cold extrusion process or the fine stamping process.

7. The vehicle seat lifting actuator capable of withstanding instantaneous high load impact according to any one of claims 1 to 3, characterized in that: A rubber gasket (15) and a metal gasket (16) are provided between the top surface of the planetary gear (7) and the inner end surface (11a) of the output gear (11); the metal gasket (16) is provided with a gasket tooth (16-1) meshing with the internal gear (111), and the metal gasket (16) is in contact with the top surface of the planetary gear (7).

8. The vehicle seat lifting actuator capable of withstanding instantaneous high load impact according to any one of claims 1 to 3, characterized in that: The gear box cover (12) and the gear box body (1) are connected by bolts, and the gear box cover (12) is provided with two symmetrically arranged notches (12a), and the gear box body (1) is provided with two positioning bosses (1-6), and the two positioning bosses (1-6) are respectively embedded in the two notches (12a) of the gear box cover (12).

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