CN219727780U - Suspension actuator and automobile - Google Patents

Abstract

The utility model provides a suspension actuator and an automobile, wherein the suspension actuator comprises a motor assembly and a speed reducer assembly; the motor assembly comprises a motor shell, a motor cover and a motor shaft; the motor cover is assembled at a first end of the motor shell, the motor shaft is arranged in the motor shell, the first end of the motor shaft is assembled on the motor cover, and the second end of the motor shaft is assembled on the second end of the motor shell; the speed reducer assembly comprises a speed reducer shell, a first planet carrier and a speed reducer shaft; the first end of the speed reducer housing is connected with the second end of the motor housing, the first planet carrier is assembled on the second end of the speed reducer housing, the speed reducer shaft is arranged in the speed reducer housing, the first end of the speed reducer shaft is connected with the second end of the motor shaft, the first end of the speed reducer shaft is assembled on the second end of the motor housing, and the second end of the speed reducer shaft is assembled on the first planet carrier. According to the utility model, the motor assembly and the speed reducer assembly are integrated into a whole, so that the axial size of the system can be reduced, the volume is reduced, the rotational inertia of the input end is reduced, and errors caused by machining and assembly are reduced, thereby improving the performance of the active suspension system.

Description

Suspension actuator and automobile

Technical Field

The utility model belongs to the technical field of suspension actuators, and particularly relates to a suspension actuator and an automobile.

Background

Actuator (Actuator): an output device or converter in the control system may convert electrical, hydraulic and pneumatic energy into mechanical motion. Actuators are key components for implementing active vibration control, and are an important link of an active control system. The actuator is also called a vibration exciter and is used for carrying out a dynamic test and is a force output device of the dynamic test.

In the research and development field of the whole vehicle active suspension system, the electromagnetic active suspension system has the advantages of simple structure, quick response and high system efficiency, but as a core part of the system, no system-level actuator can be used at present.

For the field of the whole vehicle active suspension, a suspension spring needs to be pushed to move up and down by a large acting force, the torque output by a motor is small, the rotating speed is high, the motor cannot be directly used, and the speed reduction and torque increase of the motor need to be realized through a speed reducer. The existing common speed reducer is a parallel shaft helical gear speed reducer or a planetary gear speed reducer, has effective bearing capacity and impact resistance capacity, and is difficult to meet the requirements of an active suspension; or a harmonic reducer and a cycloidal pin gear reducer are adopted, so that the speed reduction ratio is very large, but the speed reduction ratio is generally applied to the field of robots, grease lubrication is adopted, the low-temperature starting moment is large, a sealing structure is not adopted, and the speed reduction ratio cannot adapt to the complex environment of the whole vehicle. In the existing actuator of the suspension, the motor and the speed reducer are separate parts, and the volume and the cost are large.

Disclosure of Invention

The utility model provides a suspension actuator, which aims to solve the problems that a motor and a speed reducer of the existing actuator are independent parts, and the volume is large and the cost is high.

A suspension actuator comprises a motor assembly and a speed reducer assembly; the motor assembly comprises a motor shell, a motor cover and a motor shaft; the motor cover is assembled at a first end of the motor shell, the motor shaft is arranged in the motor shell, the first end of the motor shaft is assembled on the motor cover, and the second end of the motor shaft is assembled on the second end of the motor shell; the speed reducer assembly comprises a speed reducer shell, a first planet carrier and a speed reducer shaft; the first end of the speed reducer housing is connected with the second end of the motor housing, the first planet carrier is assembled on the second end of the speed reducer housing, the speed reducer shaft is arranged in the speed reducer housing, the first end of the speed reducer shaft is connected with the second end of the motor shaft, the first end of the speed reducer shaft is assembled on the second end of the motor housing, and the second end of the speed reducer shaft is assembled on the first planet carrier.

Preferably, the suspension actuator further comprises a first support bearing, wherein two ends of the motor shaft are respectively provided with one first support bearing, an outer ring of one first support bearing is assembled on the motor cover, and an outer ring of the other first support bearing is assembled on a second end of the motor shell; the two ends of the speed reducer shaft are respectively provided with a first support bearing, the outer ring of one first support bearing is assembled on the second end of the motor shell, and the outer ring of the other first support bearing is assembled on the first planet carrier.

Preferably, the speed reducer assembly further comprises an eccentric cam, a cycloidal gear and a second planet carrier; the eccentric cam is sleeved on the speed reducer shaft; the cycloidal gear is assembled in the reducer shell, and the inner ring of the cycloidal gear is connected with the eccentric cam; the second planet carrier is assembled in the speed reducer shell, and the second planet carrier and the first planet carrier are oppositely arranged at two sides of the cycloid gear; and a pin post is arranged between the second planet carrier and the first planet carrier, and the pin post penetrates through the cycloid gear.

Preferably, the suspension actuator further comprises a connecting bearing and a second support bearing; the connecting bearing is arranged between the cycloid gear and the eccentric cam; the inner rings of the two second support bearings are respectively abutted with the outer rings of the first planet carrier and the second planet carrier, and the outer rings of the two second support bearings are respectively abutted with the inner walls of the two ends of the speed reducer shell.

Preferably, the speed reducer assembly further comprises a needle roller; the outer ring of the cycloid gear is provided with a plurality of cycloid teeth at equal intervals, and the inner wall of the speed reducer shell is provided with equidistant needle roller grooves matched with the cycloid teeth at equal intervals; the rolling pins are arranged in the rolling pin grooves and meshed with the cycloid teeth, and the number of the rolling pins is one more than that of the cycloid teeth.

Preferably, the speed reducer assembly further comprises an output interface spline, and the output interface spline and the first planet carrier adopt an integrated structure.

Preferably, the motor assembly further comprises a motor rotor and a motor stator; the motor rotor is assembled on the motor shaft, the motor stator is assembled on the inner wall of the motor shell, and the motor stator is matched with the motor rotor.

Preferably, the suspension actuator further comprises a sealing structure, wherein the sealing structure comprises sealant and an oil seal; the sealant is arranged between the motor shell and the motor cover and between the motor shell and the speed reducer shell; the outer ring of the oil seal is arranged on the speed reducer shell, and the sealing lip of the oil seal is connected with the first planet carrier.

Preferably, the suspension actuator further comprises a filler plug, a drain plug and a vent plug; the speed reducer shell is provided with an oil filling hole, an oil drain hole and a vent hole; the oil filling hole and the oil drain hole are arranged in a vertically staggered mode, the oil filling plug is assembled in the oil filling hole, and the oil drain plug is assembled in the oil drain hole; the vent plug fits within the vent hole.

An automobile includes the suspension actuator.

According to the utility model, the suspension actuator comprises the motor assembly and the speed reducer assembly, and the motor assembly and the speed reducer assembly are integrated into a whole, so that the axial size of the system can be reduced, the volume is reduced, the rotational inertia of an input end is reduced, and errors caused by machining and assembly are reduced, thereby improving the performance of the active suspension system. The motor assembly comprises a motor shell, a motor cover and a motor shaft; first bulges are arranged on the circumference of the motor cover at equal intervals, second bulges are arranged on the circumference of the first end of the motor shell at equal intervals, the first bulges correspond to the second bulges, and the motor cover is fixed on the first end of the motor shell by adopting a bolt and nut assembly, so that the motor cover is convenient for people to install and detach; the motor shaft sets up in the motor casing, and the first end of motor shaft is assembled on the motor lid, and the second end of motor shaft is assembled on the second end of motor casing, is convenient for install the dismantlement to the motor shaft.

The speed reducer assembly comprises a speed reducer shell, a first planet carrier and a speed reducer shaft; third bulges are equidistantly arranged on the circumference of the first end of the speed reducer shell, fourth bulges are equidistantly arranged on the circumference of the second end of the motor shell, the third bulges correspond to the fourth bulges, and the motor shell and the speed reducer shell are connected together by adopting a bolt and nut assembly, so that the motor shell is convenient for people to install and detach; the first planet carrier is assembled on the second end of the speed reducer shell, the speed reducer shaft is arranged in the speed reducer shell, the first end of the speed reducer shaft is connected with the second end of the motor shaft, the second end of the motor shaft is provided with a connecting spline, the first end of the speed reducer shaft is provided with a groove matched with the connecting spline, the connection between the motor shaft and the speed reducer shaft is ensured to be safer and firmer, and the abrasion of parts is reduced; the first end of the speed reducer shaft is assembled on the second end of the motor shell, and the second end of the speed reducer shaft is assembled on the first planet carrier, so that the speed reducer shaft can be conveniently assembled and disassembled.

In the prior art, two independent parts of motor and reduction gear work together through bolted connection, exist the volume great, with high costs, and the location is poor, the spline wearing and tearing appear easily. In this example, the motor housing and the reducer housing are combined into a housing, and the motor assembly and the reducer assembly are integrated into one actuator, so that the axial dimension of the system is reduced, the volume is reduced, the rotational inertia of the input end is reduced, and errors caused by machining and assembly are reduced by integrating design, shared parts and the like, thereby improving the performance of the active suspension system. At the early development stage of the electromagnetic active suspension system field of the whole vehicle, no proper actuator can be used, the active suspension actuator provided by the example can solve the existing problems, has large transmission ratio, and can meet the requirements of large torque and low rotation speed required by the active suspension; the integrated active suspension actuator is characterized in that a reducer motor shares a shell, so that accumulated tolerance of a size chain is reduced, positioning is more accurate, early abrasion failure of a spline is avoided, and overall service life and NVH are prolonged.

Drawings

FIG. 1 is a cross-sectional view of a suspension actuator of the present utility model;

FIG. 2 is an isometric view of a suspension actuator of the present utility model;

fig. 3 is an exploded view of a suspension actuator according to the present utility model.

Wherein, 1, the motor assembly; 11. a motor housing; 12. a motor cover; 13. a motor shaft; 14. a motor rotor; 15. a motor stator; 2. a speed reducer assembly; 21. a speed reducer housing; 22. a first planet carrier; 23. a decelerator shaft; 24. an eccentric cam; 25. cycloidal gears; 251. cycloidal teeth; 26. a second carrier; 27. needle roller; 28. an output interface spline; 3. a first support bearing; 4. a pin; 5. connecting a bearing; 6. a second support bearing; 7. a sealing structure; 71. sealing glue; 72. an oil seal; 8. a filler plug; 9. an oil drain plug; 10. a vent plug.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

An embodiment of the present utility model provides a suspension actuator, referring to fig. 1 to 3, including a motor assembly 1 and a decelerator assembly 2; the motor assembly 1 comprises a motor housing 11, a motor cover 12 and a motor shaft 13; the motor cover 12 is assembled at a first end of the motor housing 11, the motor shaft 13 is arranged in the motor housing 11, the first end of the motor shaft 13 is assembled on the motor cover 12, and the second end of the motor shaft 13 is assembled on a second end of the motor housing 11; the speed reducer assembly 2 includes a speed reducer housing 21, a first carrier 22, and a speed reducer shaft 23; the first end of the speed reducer housing 21 is connected to the second end of the motor housing 11, the first planet carrier 22 is fitted on the second end of the speed reducer housing 21, the speed reducer shaft 23 is disposed within the speed reducer housing 21, the first end of the speed reducer shaft 23 is connected to the second end of the motor shaft 13, the first end of the speed reducer shaft 23 is fitted on the second end of the motor housing 11, and the second end of the speed reducer shaft 23 is fitted on the first planet carrier 22.

As an example, referring to fig. 2, the suspension actuator includes a motor assembly 1 and a speed reducer assembly 2, and the motor assembly 1 and the speed reducer assembly 2 are integrated into a whole, so that the axial dimension of the system can be reduced, the volume can be reduced, the rotational inertia of an input end can be reduced, and errors caused by machining and assembly can be reduced, thereby improving the performance of the active suspension system.

Referring to fig. 1 and 3, the motor assembly 1 includes a motor housing 11, a motor cover 12, and a motor shaft 13; first bulges are equidistantly arranged on the circumference of the motor cover 12, second bulges are equidistantly arranged on the circumference of the first end of the motor shell 11, the first bulges correspond to the second bulges, and the motor cover 12 is fixed on the first end of the motor shell 11 by adopting a bolt and nut assembly, so that the motor cover is convenient for people to install and detach; the motor shaft 13 is arranged in the motor housing 11, a first end of the motor shaft 13 is assembled on the motor cover 12, and a second end of the motor shaft 13 is assembled on a second end of the motor housing 11, so that the motor shaft 13 can be conveniently assembled and disassembled.

Referring to fig. 1 and 3, the speed reducer assembly 2 includes a speed reducer housing 21, a first carrier 22, and a speed reducer shaft 23; third bulges are equidistantly arranged on the circumference of the first end of the speed reducer shell 21, fourth bulges are equidistantly arranged on the circumference of the second end of the motor shell 11, the third bulges correspond to the fourth bulges, and the motor shell 11 and the speed reducer shell 21 are connected together by adopting a bolt and nut assembly, so that people can conveniently install and detach the speed reducer. The first planet carrier 22 is assembled on the second end of the speed reducer shell 21, the speed reducer shaft 23 is arranged in the speed reducer shell 21, the first end of the speed reducer shaft 23 is connected with the second end of the motor shaft 13, specifically, the second end of the motor shaft 13 is provided with connecting splines, the first end of the speed reducer shaft 23 is provided with grooves matched with the connecting splines, connection between the motor shaft 13 and the speed reducer shaft 23 is ensured to be safer and firmer, and part abrasion is reduced. The first end of the speed reducer shaft 23 is assembled on the second end of the motor housing 11, and the second end of the speed reducer shaft 23 is assembled on the first planet carrier 22, so that the speed reducer shaft 23 can be conveniently assembled and disassembled.

Specifically, the motor cover 12 includes a circular cover body, a plurality of first protrusions extending from an outer edge of the circular cover body in a radial direction of the circular cover body; correspondingly, the motor housing 11 comprises a first annular body, a first tubular body extending from the outer edge of the first annular body along the axial direction of the first annular body, a plurality of second bulges are equidistantly arranged on the outer wall of the first tubular body along the radial direction of the first annular body, assembly holes are formed in the first bulges and the second bulges, and a bolt and nut assembly can penetrate through the two assembly holes to realize detachable connection of the motor cover 12 and the motor housing 11. In this example, a first mounting groove is formed in the circular cover body, a through hole is formed in the first circular ring body, when the motor shaft 13 is assembled in the motor housing 11, a first end of the motor shaft 13 is assembled on the first mounting groove of the motor cover 12, and a second end of the motor shaft 13 passes through the through hole and contacts the motor housing 11 at a position corresponding to the through hole through a first support bearing 3.

The outer wall of first ring body in motor housing 11 is followed first ring body's radial direction equidistance has been arranged a plurality of third archs, and correspondingly, reduction gear casing 21 includes the second tubular body, and the outer wall of second tubular body is followed the radial direction equidistance of second tubular body has been arranged a plurality of fourth archs, all is equipped with the pilot hole on third arch and the fourth arch, can adopt the bolt and nut subassembly to pass two pilot holes to realize reduction gear casing 21 and motor housing 11 detachable connection. In this example, a second mounting groove is formed in the first planet carrier 22, and when the reducer shaft 23 is assembled in the reducer housing 21, a first end of the reducer shaft 23 is correspondingly connected to the motor shaft 13 by using a connecting spline, and contacts the motor housing 11 at a position corresponding to the through hole via a first support bearing 3, and a second end of the reducer shaft 23 is assembled in the second mounting groove of the first planet carrier 22.

In the prior art, two independent parts of motor and reduction gear work together through bolted connection, exist the volume great, with high costs, and the location is poor, the spline wearing and tearing appear easily. In this example, the motor housing 11 and the reducer housing 21 are combined into one housing, and the motor assembly 1 and the reducer assembly 2 are integrated into one actuator, so that the axial dimension of the system is reduced, the volume is reduced, the moment of inertia of the input end is reduced, and errors caused by machining and assembly are reduced through integrated design, shared parts and the like, thereby improving the performance of the active suspension system. At the early development stage of the electromagnetic active suspension system field of the whole vehicle, no proper actuator can be used, the active suspension actuator provided by the example can solve the existing problems, has large transmission ratio, and can meet the requirements of large torque and low rotation speed required by the active suspension; the integrated active suspension actuator is provided with the integrated active suspension actuator, the speed reducer and the motor share one shell, the accumulated tolerance of the size chain is reduced, the positioning is more accurate, the early abrasion failure of the spline is avoided, and the overall service life and NVH (noise, vibration and harshness) are improved.

In one embodiment, referring to fig. 1, the suspension actuator further includes a first support bearing 3, two ends of the motor shaft 13 are respectively provided with a first support bearing 3, an outer ring of one first support bearing 3 is assembled on the motor cover 12, and an outer ring of the other first support bearing 3 is assembled on a second end of the motor housing 11; the reducer shaft 23 is equipped with a first support bearing 3 at both ends thereof, respectively, the outer ring of one first support bearing 3 being fitted on the second end of the motor housing 11, and the outer ring of the other first support bearing 3 being fitted on the first carrier 22.

As an example, the suspension actuator further comprises a first support bearing 3, which first support bearing 3 may be a deep groove ball bearing. Namely, the first end of the motor shaft 13 is assembled on the motor cover 12 through a deep groove ball bearing, and is particularly assembled in a first mounting groove of the circular cover body through a deep groove ball bearing; the second end of the motor shaft 13 is mounted on the second end of the motor housing 11 by a deep groove ball bearing, specifically, mounted on a position corresponding to the through hole of the first ring body by a deep groove ball bearing. In this example, the motor shaft 13 is supported by two deep groove ball bearings, the outer ring of one of which is assembled on the motor cover 12, and the outer ring of the other of which is assembled on the second end of the motor housing 11, so that the motor shaft 13 is firmly installed and rotates smoothly. Accordingly, the first end of the speed reducer shaft 23 is fitted on the second end of the motor housing 11 through a deep groove ball bearing, specifically, a deep groove ball bearing is fitted on the corresponding position of the through hole of the first ring body, and the second end of the speed reducer shaft 23 is fitted on the first planet carrier 22 through a deep groove ball bearing, specifically, a deep groove ball bearing is fitted in the second mounting groove of the first planet carrier 22. In this example, the reducer shaft 23 is supported by two deep groove ball bearings, the outer ring of one of which is fitted on the second end of the motor housing 11, and the outer ring of the other of which is fitted on the first planet carrier 22, so that the reducer shaft 23 is firmly mounted and smoothly rotated.

In one embodiment, referring to fig. 1 and 3, the speed reducer assembly 2 further includes an eccentric cam 24, a cycloidal gear 25, and a second carrier 26; the eccentric cam 24 is sleeved on the speed reducer shaft 23; the cycloid gear 25 is assembled in the reducer housing 21, and the inner ring of the cycloid gear 25 is connected with the eccentric cam 24; the second carrier 26 is fitted in the speed reducer housing 21, the second carrier 26 being disposed on both sides of the cycloid gear 25 opposite to the first carrier 22; a pin 4 is arranged between the second carrier 26 and the first carrier 22, the pin 4 being provided in the cycloid gear 25.

As an example, the speed reducer assembly 2 further includes an eccentric cam 24, a cycloid gear 25 and a second planet carrier 26, wherein the eccentric cam 24 is sleeved on the speed reducer shaft 23, the cycloid gear 25 is assembled in the speed reducer housing 21, and an inner ring of the cycloid gear 25 is connected with the eccentric cam 24; when in use, the speed reducer shaft 23 is provided with two eccentric cams 24, the motor shaft 13 drives the speed reducer shaft 23 to rotate through a spline, and the eccentric cams 24 of the speed reducer shaft 23 do rotary motion, so that the cycloid gear 25 is pushed to do eccentric swing. The second carrier 26 is fitted in the speed reducer housing 21, the second carrier 26 being disposed on both sides of the cycloid gear 25 opposite to the first carrier 22; the outer side of the second end of the motor housing 11 is provided with a third mounting groove adapted to the second planet carrier 26 for facilitating mounting of the second planet carrier 26 in the reduction gear assembly 2. The second planet carrier 26 is fixed with the first planet carrier 22 through bolts, the pin 4 is arranged between the second planet carrier 26 and the first planet carrier 22, the pin 4 is arranged in the cycloid gear 25 in a penetrating mode, and the pin 4 is driven to move during the rotation of the cycloid gear 25, so that the second planet carrier 26 and the first planet carrier 22 are driven to rotate, and the smooth and safe operation of equipment is guaranteed. In this example, the pin 4 is sleeved with a sleeve, so that protection can be provided for the pin 4, the cycloidal gear 25 is prevented from directly striking the pin 4, and the service life of the pin 4 is prolonged.

In one embodiment, referring to fig. 1 and 3, the suspension actuator further comprises a connecting bearing 5 and a second support bearing 6; the connecting bearing 5 is arranged between the cycloid gear 25 and the eccentric cam 24; the inner rings of the two second support bearings 6 are respectively abutted against the outer ring of the first carrier 22 and the outer ring of the second carrier 26, and the outer rings of the two second support bearings 6 are respectively abutted against the inner walls at both ends of the speed reducer housing 21.

As an example, the suspension actuator further comprises a connecting bearing 5 and a second support bearing 6. The connecting bearing 5 adopts a needle bearing, the needle bearing is arranged between the cycloid gear 25 and the eccentric cam 24, the contact area between the cycloid gear 25 and the eccentric cam is reduced, the damage of parts caused by large friction and large heat generation during rotation is avoided, and the rotation between the cycloid gear 25 and the eccentric cam 24 can be smoother and safer. The second support bearing 6 may be a tapered roller bearing, that is, the inner rings of the two tapered roller bearings are respectively abutted with the outer ring of the first planet carrier 22 and the outer ring of the second planet carrier 26, and the outer rings of the two tapered roller bearings are respectively abutted with the inner walls of the two ends of the reducer casing 21, so as to support the first planet carrier 22 and the second planet carrier 26, so that the first planet carrier 22 and the second planet carrier 26 are firmly and safely installed and smoothly rotated.

In one embodiment, referring to fig. 1 and 3, the speed reducer assembly 2 further includes a needle 27; a plurality of cycloid teeth 251 are arranged on the outer ring of the cycloid gear 25 at equal intervals, and needle grooves (not shown) matched with the cycloid teeth 251 are arranged on the inner wall of the speed reducer shell 21 at equal intervals; the needle rollers 27 are disposed in the needle grooves to mesh with the cycloid teeth 251, and the number of the needle rollers 27 is one more than the number of the cycloid teeth 251.

As an example, the outer ring of the cycloid gear 25 is provided with a plurality of cycloid teeth 251 at equal intervals, and needle grooves (not shown) matching with the cycloid teeth 251 are provided on the inner wall of the speed reducer housing 21 at equal intervals; the needle rollers 27 are arranged in needle grooves and meshed with the cycloid teeth 251, the number of the needle rollers 27 is one more than that of the cycloid teeth 251, the reducer shaft 23 rotates for 1 circle, the cycloid gears 25 make contact with the needle rollers 27 and simultaneously perform eccentric motion for 1 circle, and the cycloid gears 25 rotate for a distance of 1 tooth along the opposite direction of the rotation of the motor shaft 13; when the cycloid gear 25 rotates, the rolling pins 27 are meshed with the cycloid teeth 251 and rotate in equidistant rolling pin grooves on the inner wall of the speed reducer shell 21, so that guide support can be provided for the cycloid gear 25, smooth rotation of the cycloid gear 25 is ensured, and part damage caused by contact between the cycloid gear 25 and the speed reducer shell 21 is avoided.

In one embodiment, referring to fig. 1 and 2, the speed reducer assembly 2 further includes an output interface spline 28, the output interface spline 28 being of unitary construction with the first carrier 22.

As an example, the output interface spline 28 and the first planet carrier 22 adopt an integrated structure, so that the installation of one output flange plate can be reduced, the installation bolts can be reduced, and the axial length can be further reduced, thereby realizing weight and cost reduction, effectively shortening the length of the equipment assembly, and being better arranged in a limited space.

In one embodiment, referring to fig. 1 and 3, the motor assembly 1 further includes a motor rotor 14 and a motor stator 15; the motor rotor 14 is mounted on the motor shaft 13, the motor stator 15 is mounted on the inner wall of the motor housing 11, and the motor stator 15 is matched with the motor rotor 14.

As an example, the motor assembly 1 further comprises a motor rotor 14 and a motor stator 15; the motor rotor 14 is assembled on the motor shaft 13, the motor assembly 1 is connected with current, the motor rotor 14 drives the motor shaft 13 to rotate under the action of electromagnetic force, the motor stator 15 is assembled on the inner wall of the motor shell 11, the motor stator 15 is matched with the motor rotor 14, and smooth and safe rotation of the motor rotor 14 and the motor shaft 13 is ensured.

In this example, the motor assembly 1 is powered on, the motor rotor 14 drives the motor shaft 13 to rotate under the action of electromagnetic force, the motor shaft 13 drives the speed reducer shaft 23 to rotate through a spline, and two eccentric cams 24 on the speed reducer shaft 23 drive the cycloid gear 25 to perform eccentric motion. Since the needle roller 27 is 1 more than the cycloid teeth 251, the speed reducer shaft 23 rotates 1 turn, and the cycloid gear 25 makes 1 turn of eccentric motion while being in contact with the needle roller 27, and the cycloid gear 25 rotates by a distance of 1 tooth in the opposite direction to the rotation of the motor shaft 13. This rotational movement moves the second planet carrier 26 and the first planet carrier 22 via the pins 4, thereby outputting power via the output interface splines 28 on the first planet carrier 22.

In one embodiment, referring to fig. 1, 2 and 3, the suspension actuator further comprises a sealing structure 7, the sealing structure 7 comprising a sealant 71 and an oil seal 72; sealant 71 is arranged between the motor housing 11 and the motor cover 12 and between the motor housing 11 and the speed reducer housing 21; the outer ring of the oil seal 72 is disposed on the speed reducer housing 21, and the seal lip of the oil seal 72 is joined to the first carrier 22.

As an example, the suspension actuator further includes a sealing structure 7, and the sealing structure 7 includes a sealant 71 and an oil seal 72. The sealant 71 may be disposed between the motor housing 11 and the motor cover 12, or may be disposed between the motor housing 11 and the speed reducer housing 21, so that the connection sealing effect between the motor housing 11 and the motor cover 12, and between the motor housing 11 and the speed reducer housing 21 is better. In this example, the oil seal 72 includes an oil seal ring and a seal lip extending radially inward along the oil seal ring, the oil seal ring is disposed on the reducer housing 21, and the seal lip of the oil seal 72 is connected with the first planet carrier 22, so that the whole device is sealed, and lubricating oil leakage is avoided, and the motor assembly 1 and the reducer assembly 2 are integrated into a whole, so that the device only needs to use one oil seal 72, and the use of the input end oil seal 72 of the reducer assembly 2 and the output end oil seal 72 of the motor assembly 1 can be reduced, thereby saving resources.

In one embodiment, referring to fig. 2 and 3, the suspension actuator further includes a filler plug 8, a drain plug 9, and a vent plug 10; the speed reducer shell 21 is provided with an oil filling hole, an oil drain hole and a vent hole; the oil filling hole and the oil drain hole are arranged in a staggered way up and down; the oil filling plug 8 is assembled in the oil filling hole; the oil drain plug 9 is assembled in the oil drain hole; the vent plug 10 fits within the vent hole.

As an example, the speed reducer housing 21 is provided with an oil filler hole, an oil drain hole, and a vent hole; the oil filling hole and the oil drain hole are arranged vertically in a staggered manner, so that the oil flows in and out to pass through a longer path, the lubricating effect on the internal parts of the equipment is improved, the cooling effect is also achieved, the oil filling plug 8 is assembled in the oil filling hole, and the oil drain plug 9 is assembled in the oil drain hole; the vent plug 10 fits within the vent hole. In an example, a vent hole may be provided at the uppermost portion of the decelerator housing 21 for mounting the vent plug 10 to facilitate the exhaust and discharge of pressure; an oil filling hole is arranged in the middle of the speed reducer shell 21 and used for installing an oil filling plug 8 so as to fill lubricating oil; an oil drain hole is formed at the lowest part of the reducer housing 21 for installing an oil drain plug 9, so as to ensure that the lubricating oil can be discharged cleanly. The equipment adopts oil lubrication, can satisfy the responsible working conditions such as whole car low temperature and silt wading, avoids appearing intaking and leads to the failure in advance, and reduction gear assembly 2 and motor assembly 1 are the commonality moreover, not only play oil lubrication effect, can also carry out the oil cooling to the system.

The embodiment of the utility model provides an automobile, which comprises a suspension actuator.

In this example, referring to fig. 1 and 3, the motor assembly 1 is turned on with current, the motor rotor 14 drives the motor shaft 13 to rotate under the action of electromagnetic force, the motor shaft 13 drives the reducer shaft 23 to rotate through the spline, and the two eccentric cams 24 on the reducer shaft 23 drive the cycloid gear 25 to also perform eccentric motion. Since the needle roller 27 is 1 more than the cycloid teeth 251, the speed reducer shaft 23 rotates 1 turn, and the cycloid gear 25 makes 1 turn of eccentric motion while being in contact with the needle roller 27, and the cycloid gear 25 rotates by a distance of 1 tooth in the opposite direction to the rotation of the motor shaft 13. This rotational movement moves the second planet carrier 26 via the pin 4 and is thus output to the rocker via the spline on the first planet carrier 22.

The motor housing 11 and the reducer housing 21 are combined into a housing, the motor assembly 1 and the reducer assembly 2 are integrated into one actuator, and the axial size of the system is reduced through integrated design, shared parts and the like, so that the volume is reduced, the rotational inertia of an input end is reduced, and errors caused by machining and assembly are reduced, so that the performance of the active suspension system is improved. At the early development stage of the electromagnetic active suspension system field of the whole vehicle, no proper actuator can be used, the active suspension actuator provided by the example can solve the existing problems, has large transmission ratio, and can meet the requirements of large torque and low rotation speed required by the active suspension; the integrated active suspension actuator reduces a shell, is shared by a speed reducer and a motor, reduces accumulated tolerance of a size chain, is more accurate in positioning, avoids early abrasion failure of a spline, and improves overall service life and NVH.

In the embodiment, the suspension actuator is applied to an electromagnetic active suspension system of the whole vehicle, and can actively control suspension lifting and improving the trafficability and stability of the whole vehicle. The motor assembly 1 and the speed reducer assembly 2 are integrated into one assembly, the volume, cost and weight of the assembly can be effectively reduced, the assembly is lubricated by oil, the motor assembly 1 and the speed reducer assembly 2 are in oil way sharing, cooling can be simultaneously carried out, low-temperature starting moment is reduced, and the problem of abnormal low-temperature starting noise is avoided.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A suspension actuator, comprising a motor assembly and a decelerator assembly;

the motor assembly comprises a motor shell, a motor cover and a motor shaft;

the motor cover is assembled at a first end of the motor shell, the motor shaft is arranged in the motor shell, the first end of the motor shaft is assembled on the motor cover, and the second end of the motor shaft is assembled on the second end of the motor shell;

the speed reducer assembly comprises a speed reducer shell, a first planet carrier and a speed reducer shaft;

the first end of the speed reducer housing is connected with the second end of the motor housing, the first planet carrier is assembled on the second end of the speed reducer housing, the speed reducer shaft is arranged in the speed reducer housing, the first end of the speed reducer shaft is connected with the second end of the motor shaft, the first end of the speed reducer shaft is assembled on the second end of the motor housing, and the second end of the speed reducer shaft is assembled on the first planet carrier.

2. The suspension actuator according to claim 1, further comprising first support bearings, one of which is fitted to each of both ends of the motor shaft, an outer ring of one of which is fitted to the motor cover, and an outer ring of the other of which is fitted to a second end of the motor housing;

the two ends of the speed reducer shaft are respectively provided with a first support bearing, the outer ring of one first support bearing is assembled on the second end of the motor shell, and the outer ring of the other first support bearing is assembled on the first planet carrier.

3. The suspension actuator according to claim 1, wherein the decelerator assembly further comprises an eccentric cam, a cycloidal gear, and a second carrier;

the eccentric cam is sleeved on the speed reducer shaft;

the cycloidal gear is assembled in the reducer shell, and the inner ring of the cycloidal gear is connected with the eccentric cam;

the second planet carrier is assembled in the speed reducer shell, and the second planet carrier and the first planet carrier are oppositely arranged at two sides of the cycloid gear;

and a pin post is arranged between the second planet carrier and the first planet carrier, and the pin post penetrates through the cycloid gear.

4. The suspension actuator according to claim 3, further comprising a connecting bearing and a second support bearing;

the connecting bearing is arranged between the cycloid gear and the eccentric cam;

the inner rings of the two second support bearings are respectively abutted with the outer rings of the first planet carrier and the second planet carrier, and the outer rings of the two second support bearings are respectively abutted with the inner walls of the two ends of the speed reducer shell.

5. The suspension actuator according to claim 3, wherein the decelerator assembly further comprises a needle roller;

the outer ring of the cycloid gear is provided with a plurality of cycloid teeth at equal intervals, and the inner wall of the speed reducer shell is provided with equidistant needle roller grooves matched with the cycloid teeth at equal intervals;

the rolling pins are arranged in the rolling pin grooves and meshed with the cycloid teeth, and the number of the rolling pins is one more than that of the cycloid teeth.

6. The suspension actuator according to claim 1, wherein the decelerator assembly further comprises an output interface spline, the output interface spline being of unitary construction with the first planet carrier.

7. The suspension actuator according to claim 4, wherein the motor assembly further comprises a motor rotor and a motor stator;

the motor rotor is assembled on the motor shaft, the motor stator is assembled on the inner wall of the motor shell, and the motor stator is matched with the motor rotor.

8. The suspension actuator of claim 1, further comprising a sealing structure comprising a sealant and an oil seal;

the sealant is arranged between the motor shell and the motor cover and between the motor shell and the speed reducer shell;

the outer ring of the oil seal is arranged on the speed reducer shell, and the sealing lip of the oil seal is connected with the first planet carrier.

9. The suspension actuator according to claim 1, further comprising a filler plug, a drain plug, and a vent plug;

the speed reducer shell is provided with an oil filling hole, an oil drain hole and a vent hole;

the oil filling hole and the oil drain hole are arranged in a vertically staggered mode, the oil filling plug is assembled in the oil filling hole, and the oil drain plug is assembled in the oil drain hole;

the vent plug fits within the vent hole.

10. An automobile comprising the suspension actuator as claimed in any one of claims 1 to 9.