A door opening and closing actuator

Abstract

The utility model provides a kind of vehicle door opening and closing actuator, its transmission pair has big transmission ratio and reduces the quantity of parts (especially shell parts) by optimizing shell structure, and then facilitate assembly.It includes shell, drive motor, transmission assembly, screw, vehicle body connecting piece, transmission assembly includes transmission gear one and transmission gear two, transmission ratio is 10-20, shell includes shell one and shell two, one end of shell one is open to form assembling mouth one, other end is equipped with through hole one, for screw to extend, transmission gear one, transmission gear two are placed into shell one by assembling mouth one;Shell two includes cylindrical mounting section and end cap, one end of cylindrical mounting section is open to form assembling mouth two, for being connected with drive motor, other end is in contact with assembling mouth one and is equipped with through hole two, one end of transmission gear one is connected with the output end of drive motor by through hole two, end cap is used to be connected with shell one and the plugging of assembling mouth one is carried out.

Description

Technical Field

[0001] This utility model relates to the field of vehicle door technology, specifically a vehicle door opening and closing actuator. Background Technology

[0002] Currently, most car doors on the market use mechanical opening mechanisms. With the development of technology, future cars will become more intelligent, and the door opening methods will need to include automated opening mechanisms to meet the needs of more scenarios.

[0003] To meet the above requirements, electric actuators are now used to open and close car doors. An electric actuator typically includes a motor, transmission assembly, lead screw, and a body connector. The motor generates power, which is then transmitted to the lead screw via the transmission assembly. One end of the lead screw is connected to the car body via the body connector. Simultaneously, the lead screw assembly converts rotational motion into linear motion, thereby moving the door relative to the car body and achieving opening and closing. Currently available electric actuators often suffer from a large number of parts and inconvenient assembly, thus requiring optimization and innovation in this area. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a door opening and closing actuator that optimizes the housing structure, thereby reducing the number of parts (especially housing parts) and facilitating assembly.

[0005] The technical solution is as follows: a car door opening and closing actuator, comprising a housing, a drive motor, a transmission assembly, a lead screw, and a car body connector. The drive motor drives the lead screw to move through the transmission assembly. One end of the lead screw is connected to the car body through the car body connector. The transmission assembly comprises a transmission pair consisting of a first transmission gear and a second transmission gear, with a transmission ratio of 10-20. The housing comprises a first housing and a second housing. One end of the first housing is open to form an assembly port, and the other end is provided with a through hole for the lead screw to extend out. The first transmission gear and the second transmission gear are inserted into and installed in the first housing through the assembly port.

[0006] The second housing includes a cylindrical mounting section and an end cap. One end of the cylindrical mounting section is open to form an assembly port two for connecting to the drive motor. The other end contacts the assembly port one and is provided with a through hole two. One end of the transmission gear one is connected to the output end of the drive motor through the through hole two. The end cap is used to connect to the first housing and to seal the assembly port one.

[0007] Furthermore, the first transmission gear and the second transmission gear are arranged in parallel. The side of the first housing protrudes outward to form a cavity for accommodating the first transmission gear. The lead screw passes through the second transmission gear along its axis and is connected to it by a thread. The two ends of the second transmission gear are respectively provided with mounting rods, which are respectively installed inside the first housing by bearings. The two ends of the first transmission gear are also installed inside the first housing by bearings.

[0008] Furthermore, the mounting rod near the through hole one extends into the through hole one and seals the gap of the through hole one by the sealing ring one. The connection between the housing one and the housing two is sealed by the sealing ring two. The sealing ring two protrudes outward to avoid the transmission gear one or the connection assembly between the transmission gear one and the drive motor.

[0009] Furthermore, the through hole of the housing one is provided with a recessed mounting groove one for embedding the sealing ring one, and the assembly port of the housing one is provided with a recessed mounting groove two for embedding the sealing ring two.

[0010] Furthermore, the output end of the drive motor is connected to the transmission gear via a coupling located within the cylindrical mounting section.

[0011] Furthermore, the end cap facing the assembly port one extends into the assembly port one to form an annular bearing mounting block. The bearing mounting block is coaxially arranged with the inner wall of the assembly port one. The assembly rod of the transmission gear two extends into the bearing mounting block, and a bearing is installed between the assembly rod and the bearing mounting block.

[0012] Furthermore, the housing also includes a cylindrical housing three, which is fixedly connected to the end of the end cap away from the housing one, and is used to accommodate the portion of the lead screw that extends out of the end cap. The lead screw passes through the housing one and the end cap and then extends into the housing three.

[0013] Furthermore, the end of the lead screw also contacts the inner wall of the housing three via a spacer ring.

[0014] Furthermore, the first housing and the second housing are positioned by a positioning rod and a positioning hole; the cylindrical mounting section of the second housing is coaxially arranged with the third housing, and the cylindrical mounting section is also provided with a U-shaped positioning groove, and the third housing is located in the U-shaped positioning groove.

[0015] Furthermore, bolt mounting slots are provided on opposite sides of the outer surface of the housing. The connecting bolt can be inserted into the bolt mounting slot from the side. When the connecting bolt is in the bolt mounting slot, the bolt mounting slot can restrict the axial movement of the connecting bolt. The threaded part of the connecting bolt can extend out of the bolt mounting slot and be fixedly connected to the door. A reinforcing plate is also provided in the bolt mounting slot, which extends from the bottom of the slot to the head of the connecting bolt.

[0016] Beneficial effects: 1. One end of housing 1 in this design is open to form assembly port 1, which facilitates the placement of transmission components and other parts into the housing. At the same time, the other end adopts the form of a through hole, and the lead screw can directly extend out of housing 1 through the through hole 1 to connect with the vehicle body connector. There is no need to use an additional end cap or flange to form the end face of the other end of housing 1, thereby reducing the number of parts and facilitating subsequent assembly. Meanwhile, housing 2 adopts a connected cylindrical mounting section and end cap. One end of the cylindrical mounting section and the end cap together seal the open assembly port 1, and the other end of the cylindrical mounting section is connected to the drive motor. After each component is placed into the housing, only the drive motor, housing 1, and housing 2 need to be connected to each other to complete the assembly, which is convenient.

[0017] 2. Since both transmission gear one and transmission gear two are installed inside housing one, and transmission gear one and transmission gear two are assembled with housing one as the reference, the assembly accuracy of the transmission gears can be guaranteed.

[0018] 3. The transmission pair adopts a large transmission ratio of 10-20, which can increase the output torque and thus generate enough force to open the car door. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a structural schematic diagram of shell one (viewpoint one);

[0021] Figure 3 A schematic diagram of the structure of shell one (perspective two);

[0022] Figure 4 A schematic diagram of the structure of shell two (viewpoint one);

[0023] Figure 5 This is a structural schematic diagram of shell two (viewpoint two);

[0024] Figure 6 This is a schematic diagram of the structure of the present invention, omitting the outer casing.

[0025] Figure 7 This is a schematic diagram of the present invention, omitting the second and third housings.

[0026] Figure 8 This is a schematic diagram of the structure of transmission gear one and transmission gear two;

[0027] Figure 9 for Figure 6 Enlarged view of point B in the middle;

[0028] Figure 10 This is a schematic diagram of a bellows structure. Detailed Implementation

[0029] like Figure 1 , Figure 6 , Figure 7 The illustrated door opening / closing actuator includes a housing, a drive motor 2, a transmission assembly, a lead screw 4, and a vehicle body connector 5. The transmission assembly comprises a single-stage parallel shaft gear transmission pair consisting of a first transmission gear 31 and a second transmission gear 32, with a transmission ratio of 15. The drive motor 2 drives the lead screw 4 through the transmission assembly. One end of the lead screw 4 is connected to the vehicle body through the vehicle body connector 5 (the lead screw 4 is directly connected to the vehicle body through the vehicle body connector 5 without other intermediate components, thereby reducing parts and noise). The working principle of this door opening / closing actuator is similar to that of existing door opening / closing actuators, both transmitting torque through the motor and the transmission assembly. Because the lead screw end is connected to the vehicle body, its axial rotation is restricted, enabling linear motion of the lead screw relative to the transmission assembly, thereby driving the relative motion between the door and the vehicle body and realizing the opening and closing of the door. One of the main innovations of this solution is the improvement of the housing structure, namely: the housing includes a first housing 11 and a second housing 12, combined with... Figure 2 , Figure 3 As shown, one end of the housing 11 is open to form an assembly port 111, and the other end is provided with a through hole 112. The lead screw 4 can extend directly through the through hole 112 and connect with the vehicle body connector 5 (a device such as...) can be installed between the through hole 112 and the vehicle body connector 5. Figure 10 The bellows 10 shown has a lead screw 4 located inside it, between the through hole 112 and the vehicle body connector 5. This prevents the lead screw 4 from being exposed and prevents dust and other impurities from adhering to the lead screw 4 and entering the housing. The bellows can also extend and retract accordingly with the lead screw 4. The transmission gear 31 and transmission gear 32 can be directly inserted into the housing 11 through the assembly port 111. Figure 4 , Figure 5As shown, housing 12 includes a cylindrical mounting section 121 and an end cap 122. One end of the cylindrical mounting section 121 is open to form an assembly port 1211, which is used to connect to the drive motor 2 via a flange. It also facilitates the direct insertion of the output end of the drive motor 2 to connect to the transmission gear 31. The other end contacts the assembly port 111 and is provided with a through hole 1212. One end of the transmission gear 31 is connected to the output end of the drive motor 2 through the through hole 1212. The end cap 122, which is connected to the cylindrical mounting section 121, is used to connect to housing 11 and seal the assembly port 111. With this structure, the main housing structure of the actuator can be formed using only housing 11 and housing 12.

[0030] Based on the above, such as Figure 6 , Figure 7 As shown, the specific structure of this scheme is as follows: transmission gear 31 and transmission gear 32 are arranged in parallel, and the side of housing 11 protrudes outward to form a cavity A for accommodating transmission gear 31 (e.g., Figure 3 As shown), the lead screw 4 passes through the transmission gear 32 along the axis of the transmission gear 32 and is connected to it by a thread, thus engaging... Figure 8 The transmission gear 32 has mounting rods 321 at both ends, which are mounted inside the housing 11 via bearings 8. At the same time, the transmission gear 31 also has bearings 8 installed between its two ends and the housing 11. In this way, the transmission gear 31 and the transmission gear 32 are mounted with bearings 8 (e.g., angular contact bearings) at both ends and installed in the same housing, with the housing 11 as the mounting reference, which ensures the center distance tolerance of the meshing of the two gears. If they are installed separately in different housings and then assembled, the machining error of the housing and the assembly accuracy between them will further affect the installation accuracy of the gears.

[0031] Meanwhile, to facilitate the installation of the bearing 8 at assembly port 111, the end cover 122 extends into the assembly port 111 to form an annular bearing 8 mounting block 1221 (combined with...). Figure 4 The bearing 8 mounting block 1221 is coaxially arranged with the inner wall of the assembly port 111. The assembly rod 321 of the transmission gear 2 32 extends into the bearing 8 mounting block 1221. The bearing 8 is installed between the assembly rod 321 and the bearing 8 mounting block 1221.

[0032] Additionally, the mounting rod 321, located near the through hole 112, extends into the through hole 112 and seals the gap at the through hole 112 with the sealing ring 61 (in conjunction with...). Figure 9 The connection between housing 11 and housing 12 is achieved through, for example... Figure 6The sealing ring 62 shown seals the gap at the connection. The sealing ring 62 protrudes outwards to avoid the transmission gear 31 or the connection assembly between the transmission gear 31 and the drive motor 2. The position of the through hole 112 of the housing 11 can be achieved by providing a recessed mounting groove for embedding the sealing ring 61. Similarly, the assembly opening 111 of the housing 11 has a recessed mounting groove for embedding the sealing ring 62. In this way, by providing the sealing rings 61 and 62, the two openings of the housing 11 can be statically sealed to prevent dust from entering the housing 11.

[0033] Shell 2.12 can also be used to accommodate, for example Figure 7 The coupling 7 shown connects the output end of the drive motor 2 to the transmission gear 31. The coupling 7 is located within the cylindrical mounting section 121 of the housing 12. This structure, using the coupling 7 to connect the motor shaft and gear shaft, compensates for any misalignment of the motor shaft, resulting in more stable transmission and less noise and vibration. It is also worth noting that the transmission gear 31 is integrated with the shaft, simplifying machining and assembly; the bearing 8 and gear shaft are mounted with a clearance fit, reducing manufacturing costs; the high-ratio transmission of the single-stage parallel shaft gear reduces the installation space of the actuator; the transmission gear 31 can be a small gear, and the transmission gear 32 can be a large gear. The small gear can be made of metal (e.g., stainless steel, 45# steel) to ensure strength, while the large gear can be made of plastic to reduce costs. The transmission ratio used in the figure is 11.4, a larger ratio that is more conducive to torque transmission.

[0034] During operation, the motor's rotation is transmitted to the gears via coupling 7. Coupling 7 absorbs transmission errors between the motor shaft and the gear shaft, misalignment of the motor shaft, and motor vibration. Coupling 7 transmits torque to the gears, amplifying the torque through a single-stage gear transmission. The large gear transmits motion to the lead screw 4 via its internal thread, ultimately converting the rotational motion into linear motion of the lead screw 4. At this point, the car door automatically opens and closes as the lead screw 4 moves. The opening and closing of the car door can also be detected via the PCB board at the motor end.

[0035] As other optional structures, such as Figure 1 As shown, the housing also includes a cylindrical housing 3 13, which is fixedly connected to the end of the end cap 122 opposite to the housing 11, and is used to accommodate the portion of the lead screw 4 extending out of the end cap 122. The lead screw 4 passes through the housing 11 and the end cap 122 and then extends into the housing 3 13. The end of the lead screw 4 located inside the housing 3 13 can also be connected by means of... Figure 7The spacer ring 41 shown contacts the inner wall of housing 13, and the other end is hinged to the vehicle body connector 5 via a hinge, ensuring the coaxiality of the lead screw and nut (gear internal thread) and improving the transmission performance of the lead screw 4. In addition, housing 13 and end cover 122 are fixedly connected by screws, and O-rings are also provided between them for sealing.

[0036] For ease of assembly, housing 11 and housing 22 are connected by means of... Figure 3 , Figure 4 The positioning rod 123 and positioning hole 113 are used for positioning. 124 and 114 in the figure are corresponding connecting holes on the two housings for connecting the two housings with bolts. Thus, during assembly, only the positioning rod 123 and positioning hole 113 are needed for positioning, and the connecting holes are used for bolt connection to achieve the assembly of housing one and two, making assembly convenient. The cylindrical mounting section 121 of housing two 12 is coaxially arranged with housing three 13. The cylindrical mounting section 121 also has... Figure 5 The U-shaped positioning groove 125 shown is used to position and support the housing 13. The housing 13 can be limited and supported by the housing 2 12, which reduces the length of the suspended part of the housing 13 and makes it more vertical.

[0037] Combination Figure 1 , Figure 2 The outer sides of the housing 11 are respectively provided with bolt mounting slots 115. The connecting bolt 9 can be inserted into the bolt mounting slot 115 from the side. When the connecting bolt 9 is in the bolt mounting slot 115, the bolt mounting slot 115 can restrict the axial movement of the connecting bolt 9. The threaded shank of the connecting bolt 9 can extend out of the bolt mounting slot 115 and be fixedly connected to the door. For example, the shank can pass through the mounting hole of the door and be fixed with a nut. Compared with the traditional method of using a threaded rod that penetrates the housing for connection, the above method not only simplifies the structure but also reduces the size of the housing. In addition, a reinforcing plate 116 is provided in the bolt mounting slot 115, which extends from the bottom of the slot to the head of the connecting bolt. It is used to prevent the bolt 9 from falling out after it is inserted into the bolt mounting slot 115, and at the same time, it can also enhance the housing strength at the bolt mounting slot 115.

[0038] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A door opening and closing actuator, comprising a housing, a drive motor, a transmission assembly, a lead screw, and a vehicle body connector, wherein the drive motor drives the lead screw to move through the transmission assembly, and one end of the lead screw is connected to the vehicle body through the vehicle body connector, characterized in that: The transmission assembly includes a transmission pair consisting of a transmission gear one and a transmission gear two, with a transmission ratio of 10-20. The housing includes a housing one and a housing two. One end of the housing one is open to form an assembly port one, and the other end is provided with a through hole one for the lead screw to extend out. The transmission gear one and the transmission gear two are inserted into and installed in the housing one through the assembly port one. The second housing includes a cylindrical mounting section and an end cap. One end of the cylindrical mounting section is open to form an assembly port two for connecting to the drive motor. The other end contacts the assembly port one and is provided with a through hole two. One end of the transmission gear one is connected to the output end of the drive motor through the through hole two. The end cap is used to connect to the first housing and to seal the assembly port one.

2. The door opening and closing actuator according to claim 1, characterized in that: The first transmission gear and the second transmission gear are arranged in parallel. The side of the first housing protrudes outward to form a cavity for accommodating the first transmission gear. The lead screw passes through the second transmission gear along the axis of the second transmission gear and is connected to it by a thread. The two ends of the second transmission gear are respectively provided with mounting rods. The mounting rods are respectively installed inside the first housing by bearings. The two ends of the first transmission gear are also installed inside the first housing by bearings.

3. A door opening and closing actuator according to claim 2, characterized in that: The mounting rod near the first through hole extends into the first through hole and seals the gap at the first through hole with a sealing ring. The connection between the first housing and the second housing is sealed with a sealing ring. The sealing ring protrudes outward to avoid the first transmission gear or the connection assembly between the first transmission gear and the drive motor.

4. A door opening and closing actuator according to claim 3, characterized in that: The through hole of the housing one is provided with a recessed mounting groove one for embedding the sealing ring one, and the assembly port of the housing one is provided with a recessed mounting groove two for embedding the sealing ring two.

5. A door opening and closing actuator according to claim 2, characterized in that: The end cap facing the assembly port one extends into the assembly port one to form an annular bearing mounting block. The bearing mounting block is coaxially arranged with the inner wall of the assembly port one. The assembly rod of the transmission gear two extends into the bearing mounting block. A bearing is installed between the assembly rod and the bearing mounting block.

6. A door opening and closing actuator according to any one of claims 1-5, characterized in that: The output end of the drive motor is connected to the transmission gear through a coupling, which is located inside the cylindrical mounting section.

7. A door opening and closing actuator according to any one of claims 1-5, characterized in that: The housing also includes a cylindrical housing three, which is fixedly connected to the end of the end cap away from the housing one, and is used to accommodate the portion of the lead screw that extends out of the end cap. The lead screw passes through the housing one and the end cap and then extends into the housing three.

8. A door opening and closing actuator according to claim 7, characterized in that: The end of the lead screw also contacts the inner wall of the housing three through a spacer ring.

9. A door opening and closing actuator according to claim 7, characterized in that: The first housing and the second housing are positioned by a positioning rod and a positioning hole; the cylindrical mounting section of the second housing is coaxially arranged with the third housing, and the cylindrical mounting section is also provided with a U-shaped positioning groove, and the third housing is located in the U-shaped positioning groove.

10. A door opening and closing actuator according to any one of claims 1-5, characterized in that: The outer sides of the housing are respectively provided with bolt mounting slots. The connecting bolt can be inserted into the bolt mounting slot from the side. When the connecting bolt is in the bolt mounting slot, the bolt mounting slot can restrict the axial movement of the connecting bolt. The threaded part of the connecting bolt can extend out of the bolt mounting slot and be fixedly connected to the door. The bolt mounting slot is also provided with a reinforcing plate, which extends from the bottom of the slot to the head of the connecting bolt.

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