Electric side-opening door driver

Abstract

The utility model discloses an electric side opening door driver which comprises a lead screw assembly, a vehicle door installation assembly, a transmission shell assembly and a driving device, one end of the lead screw assembly is used for being connected with a vehicle body, and the vehicle door installation assembly is used for being connected with a vehicle door. The transmission shell assembly comprises a transmission shell and a ball head nut assembly which is rotatably supported in the transmission shell, and the ball head nut assembly comprises a ball head lead screw nut, a ball head support and a transmission gear; the ball head support is provided with a supporting spherical surface cavity matched with the partial spherical surface of the ball head lead screw nut. The transmission gear is provided with a limiting spherical surface cavity matched with a part of the spherical surface of the ball head lead screw nut, the ball head support and the transmission gear are matched with the ball head lead screw nut through the two sides of the ball head lead screw nut, and the transmission gear is in torque connection with the ball head lead screw nut. According to the utility model, the requirements on the manufacturing process and the mounting process of each part of the ball head screw nut are lower, and the precision and the reliability of the assembled ball head screw nut assembly are easier to guarantee.

Description

Technical Field

[0001] The utility model relates to the technical field of door opening drivers, and more specifically to an electric side door opening driver. Background Art

[0002] At present, the mainstream electric side door actuators in mass production on the market are screw type and push rod type. The screw type has one less push rod assembly than the push rod type, and the structure is more compact. Therefore, the screw type has become an important driving solution for electric side door actuators. The screw type electric side door actuator has one end of the screw assembly connected to the vehicle body, and the transmission assembly where the screw nut is located is connected to the door. By driving the screw nut to rotate, the screw assembly is displaced horizontally to realize the opening and closing of the door.

[0003] The axis of the rotary hinge of the car's side door is not in a straight line with the body mounting point of the electric side door drive, which causes the support rod (screw rod / push rod) connected to the body to swing toward the inside and outside of the door relative to the initial position during the door opening and closing process. The screw rod swing will cause the transmission assembly arranged in the door to swing synchronously. The swing of the transmission assembly requires a swing space and a safety side gap to be reserved in the door, resulting in more space being occupied. In order to reduce the encroachment on space, the swing structure of the ball joint has become an effective solution. In the prior art, a ball head screw nut assembly has appeared. The ball joint of the ball head screw nut can be deflected to adapt to the back and forth swing of the screw rod when realizing the side door opening and closing function, which can minimize the encroachment on the layout space.

[0004] The existing ball screw nuts are designed with two ball supports on the outside to wrap the ball nuts. In the prior art, one design is to wrap the ball screw nuts with two ball supports from the upper and lower sides, and another design is to wrap the ball screw nuts with two ball supports from the left and right sides. The two designs are similar in structure. The following takes the example of wrapping the ball screw nuts with two ball supports from the left and right sides as an example.

[0005] The left and right ball supports respectively wrap the ball screw nuts from both sides, and are provided with transmission gears, which drive the ball support and the ball screw nut to rotate. The screw matched with the thread of the ball screw nut can rotate at a certain angle. When the screw deflects, the ball screw nut moves in the two ball supports.

[0006] The left and right ball supports need to rotate with the transmission gear and ball screw nut, so they need to be supported by supporting parts (such as bearings). The transmission gear is arranged between the left and right ball supports and connected to the ball screw nut through a pin to achieve torque transmission. The entire ball screw nut assembly includes four transmission parts: ball screw nut, left and right ball supports and transmission gear. The more transmission parts there are, the higher the requirements for manufacturing and assembly processes.

[0007] Therefore, how to reduce the manufacturing and assembly process of the ball head nut assembly has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0008] In view of this, the purpose of the utility model is to provide an electric side-opening door driver to reduce the manufacturing and assembly process of the ball head and nut assembly thereof.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An electric side door driver comprises a screw assembly, a door mounting assembly, a transmission housing assembly and a driving device, wherein one end of the screw assembly is used to be connected to the vehicle body, and the door mounting assembly is used to be connected to the vehicle door;

[0011] The transmission housing assembly comprises a transmission housing and a ball screw nut assembly rotatably supported in the transmission housing, wherein the ball screw nut assembly comprises a ball screw nut, a ball support and a transmission gear;

[0012] The ball screw nut cooperates with the screw thread of the screw assembly, the ball head support has a supporting spherical cavity that cooperates with a partial spherical surface of the ball head screw nut, the ball head screw nut is installed in the ball head support, and the supporting spherical cavity supports the ball head screw nut, the transmission gear has a limiting spherical cavity that cooperates with a partial spherical surface of the ball head screw nut, the transmission gear is arranged on the side of the ball head screw nut opposite to the ball head support, and abuts against the ball head screw nut through the limiting spherical cavity, the transmission gear is torque-connected to the ball head screw nut, and the driving device is used to drive the transmission gear to rotate.

[0013] Optionally, in the above-mentioned electric side door opening driver, the end of the ball head support away from the transmission gear has a first support portion, the end of the transmission gear away from the ball head support has a second support portion, the first support portion is sleeved with a first support member, and the second support portion is sleeved with a second support member;

[0014] The first support member and the second support member are both supported in the transmission housing.

[0015] Optionally, in the above-mentioned electric side door opening drive, the first support member and the second support member are both bearings;

[0016] The outer ring of the bearing of the first support member is limited by the limiting boss of the transmission housing, and the inner ring of the bearing is limited by the limiting boss of the ball head support;

[0017] The outer ring of the bearing of the second support member is limited by a bearing pressing block detachably fixed to the end of the transmission housing, and the inner ring of the bearing is limited by a limiting boss of the transmission gear.

[0018] Optionally, in the above-mentioned electric side door opening drive, one end of the bearing pressure block is connected to the transmission housing, and the other end is connected to a dust cover, and the screw rod is hidden in the dust cover.

[0019] Optionally, in the above-mentioned electric side door opening driver, the transmission gear includes at least a gear portion and the second supporting portion along the axial direction;

[0020] A connecting groove extending along the axial direction of the gear portion is provided on the end surface of the gear portion facing the ball head support;

[0021] One end of the ball head support facing the gear part is provided with a connecting tooth inserted into the connecting groove.

[0022] Optionally, in the above-mentioned electric side door opening driver, a transmission groove is provided on the ball screw nut, and the transmission groove extends along the swing direction of the ball screw nut;

[0023] The ball head support is provided with a transmission hole, and the ball head support and the ball head screw nut are connected through a transmission pin passing through the transmission hole and the transmission groove.

[0024] Optionally, in the above-mentioned electric side door opening driver, the ball head nut assembly also includes a radial limiting portion, and the radial limiting portion is sleeved on the outer side of the ball head support and covers the transmission pin.

[0025] Optionally, in the above-mentioned electric side door opening drive, the radial limiting portion is a part of the transmission gear, or the radial limiting portion is a clamp or a radial limiting ring independently provided on the transmission gear.

[0026] Optionally, in the above-mentioned electric side door opening drive, one end of the radial limit ring abuts against the first support member on the first support part, and the other end abuts against the end face of the gear part.

[0027] Optionally, in the above-mentioned electric side door opening driver, the connecting grooves are multiple and arranged along the circumference of the gear part; and / or,

[0028] The connecting groove passes through the gear part along the axial direction of the gear part; and / or,

[0029] Along the axial direction of the ball head support, the axial middle area of ​​the gear part and the axial middle area of ​​the ball head screw nut are staggered.

[0030] Optionally, in the above-mentioned electric side door opening driver, the screw assembly includes:

[0031] The screw rod;

[0032] The vehicle body mounting bracket is rotatably arranged at one end of the screw rod, and the vehicle body mounting bracket is used to be connected to the vehicle body.

[0033] Optionally, in the above-mentioned electric side door opening drive, the body mounting bracket is arranged on one end of the screw through a screw adapter shaft, the screw adapter shaft is fixed to one end of the screw, and the body mounting bracket is hinged to the screw adapter shaft through a hinge shaft.

[0034] Optionally, in the above-mentioned electric side door opening driver, the door mounting assembly includes:

[0035] A door mounting bracket, the first end of which is fixed to the transmission housing, and the second end of which is in an open state so as to allow one end of the screw assembly connected to the vehicle body to extend out;

[0036] A bellows has one end fixed to the first end of the door mounting bracket and the other end fixed to one end of the screw rod assembly for connecting with the vehicle body.

[0037] Optionally, the above-mentioned electric side door opening drive also includes a transfer shell, which is an integrated structure with the transmission shell, or the transfer shell has a first docking portion that is detachably connected to the transmission shell; the transfer shell also has a second docking portion that is detachably connected to the drive device.

[0038] Optionally, in the above-mentioned electric side door opening driver, the driving device is a driving motor, and the motor shaft of the driving motor extends into the adapter housing;

[0039] The transfer housing is a first transfer housing or a second transfer housing, the first transfer housing has a fixing interface for fixing a PCB board assembly, and the PCB board assembly is used to connect with a driving device to realize the interaction of magnetic signals and electrical signals;

[0040] The second adapter housing has a fixing interface for fixing a controller component, and the controller component is used to connect with a driving device to realize the interaction of magnetic signals and electrical signals.

[0041] Optionally, in the above-mentioned electric side door opening drive, the driving device drives the transmission gear to rotate through a worm assembly.

[0042] Optionally, in the above-mentioned electric side door opening drive, the worm assembly includes at least a worm rotatably supported in the transmission housing, the worm is transmission-connected to the drive device and meshes with the transmission gear.

[0043] The electric side-opening door driver provided by the utility model eliminates a ball head support of a ball head nut assembly, and a limiting spherical cavity that cooperates with the ball head screw nut is arranged on the transmission gear. The ball head screw nut is installed on a ball head support and supported by the supporting spherical cavity. The transmission gear is arranged on the side opposite to the ball head support, and the limiting spherical cavity is used to abut the ball head screw nut to prevent the ball head screw nut from detaching from the ball head support.

[0044] During the rotation of the transmission gear, the ball screw nut will be driven to rotate. When the ball screw nut assembly is applied to the electric side door opening driver, it can drive the screw assembly to move back and forth to realize the door opening and closing operation. The electric side door opening driver provided by the utility model has a ball screw nut assembly with one less ball head support. Compared with the prior art in which the ball screw nut is symmetrically arranged between two ball head supports, since the ball screw nut is supported by only one ball head support, it is easier to ensure the accuracy by processing the supporting spherical cavity on one ball head support, avoiding processing the supporting spherical cavity on two ball head supports. After the two ball head supports are closed, since the supporting spherical cavity is processed on two components, the accumulated processing errors of the two components will affect the assembly of the ball screw nut and the two ball head supports. The utility model only has one ball head support. In order to prevent the ball screw nut from falling off, a limiting spherical cavity is processed on the transmission gear to abut against part of the spherical surface of the ball screw nut to prevent the ball screw nut from moving away from the ball head support. The utility model only provides support force for the ball screw nut through the ball head support, while the transmission gear does not provide support force, so it only needs to increase the strength of the ball head support, and the transmission gear only needs to meet the strength required for transmission, and the strength requirement is relatively low. The utility model has lower requirements on the manufacturing process and installation process of each component, and it is easier to ensure the accuracy and reliability of the ball head screw nut assembly after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 It is a structural schematic diagram of an electric side-opening door driver disclosed in an embodiment of the utility model;

[0047] Figure 2 It is a structural schematic diagram of another electric side door opening driver disclosed in an embodiment of the utility model;

[0048] Figure 3It is a front view of an electric side-opening door driver disclosed in an embodiment of the utility model;

[0049] Figure 4 for Figure 3 Section view along line AA;

[0050] Figure 5 for Figure 3 Sectional view along line BB;

[0051] Figure 6 An exploded view of a transmission housing assembly disclosed in an embodiment of the utility model;

[0052] Figure 7 It is a structural schematic diagram of a ball head nut assembly disclosed in an embodiment of the utility model;

[0053] Figure 8 It is a partial exploded view of the electric side door driver with integrated controller disclosed in the embodiment of the utility model;

[0054] Fig. 9 It is a partial exploded view of the electric side door driver without integrated controller disclosed in the embodiment of the utility model.

[0055] The meanings of the reference numerals in the figures are as follows:

[0056] 100-screw assembly; 110-body mounting bracket; 120-bushing; 130-hinge shaft; 140-screw transfer shaft; 150-screw;

[0057] 200-door mounting assembly; 210-door mounting bracket; 220-corrugated pipe;

[0058] 300-transmission housing assembly; 310-transmission housing; 320-worm axial limit pin; 330-hole retaining ring; 340-ball head screw nut assembly; 341-first support member; 342-ball head support; 3421-connecting tooth; 3422-transmission hole; 3423-first support part; 343-radial limit ring; 344-transmission pin; 345-ball head screw nut; 3451-transmission groove; 346-transmission gear; 3461-gear part; 3462-second support part; 3463-connecting groove; 347-second support member; 350-worm assembly; 351-first worm support member; 352-worm; 353-rubber gasket; 354-second worm support member; 360-sealing ring; 370-bearing block;

[0059] 400-dust cover assembly; 410-sealing gasket; 420-dust cover;

[0060] 500 - adapter housing; 510 - first adapter housing; 520 - sealing ring; 530 - second adapter housing;

[0061] 600-driving device; 610-sealing ring;

[0062] 700-controller assembly;

[0063] 800-PCB board assembly. DETAILED DESCRIPTION

[0064] The core of the utility model is to disclose an electric side-opening door driver to reduce the manufacturing and assembly process of the ball head screw nut component thereof.

[0065] The following describes the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0066] like Figure 1-Figure 3 As shown, the embodiment of the utility model also discloses an electric side door opening driver, which includes a screw assembly 100, a door mounting assembly 200, a transmission housing assembly 300 and a driving device 600. Among them, one end of the screw assembly 100 is used to connect with the vehicle body, and the door mounting assembly 200 is used to connect with the door.

[0067] The transmission housing assembly 300 includes a transmission housing 310 and a ball screw nut assembly 340 rotatably supported in the transmission housing 310. The ball screw nut 345 of the ball screw nut assembly 340 is threadedly engaged with the screw 150 of the screw assembly 100. The door mounting assembly 200 is connected to the transmission housing 310, the screw 150 extends from the door mounting assembly 200 and is connected to the vehicle body, and the driving device 600 is used to drive the transmission gear 346 to rotate.

[0068] like Figure 4 , Figure 6 and Figure 7 As shown, the ball screw nut assembly 340 disclosed in the embodiment of the utility model includes a ball screw nut 345 , a ball support 342 and a transmission gear 346 .

[0069] The ball screw nut 345 has a spherical surface, so that it can form a ball joint with other components. The ball screw nut 345 can be an incomplete sphere, such as Figure 7In the structure shown, the ball screw nut 345 is formed by cutting off a part of a sphere symmetrically along the axial direction of the sphere. It should be noted that as long as the ball screw nut 345 has a spherical surface, it can swing according to the force of the screw rod matched with it.

[0070] The ball support 342 has a supporting spherical cavity that matches with a part of the spherical surface of the ball screw nut 345. One end of the ball support 342 is a ball support installation opening for the ball screw nut 345 to be installed. The size of the ball support installation opening is not less than the ball diameter of the ball screw nut 345, so that the ball screw nut 345 can be installed through the ball support installation opening, and the corresponding spherical surface on the ball screw nut 345 matches with the supporting spherical cavity. After the ball screw nut 345 is installed in the ball support 342, and the supporting spherical cavity can support the ball screw nut 345, more than half of the spherical surface of the ball screw nut 345 is located in the supporting spherical cavity.

[0071] The transmission gear 346 has a limited spherical cavity that cooperates with the partial spherical surface of the ball screw nut 345. The transmission gear 346 is arranged on the side of the ball screw nut 345 opposite to the ball head support 342, that is, the transmission gear 346 and the ball head support 342 are respectively located on both sides of the ball screw nut 345.

[0072] The transmission gear 346 abuts against the ball screw nut 345 through its limiting spherical cavity, and the role of the limiting spherical cavity is to block the ball support installation port of the ball support 342. By using the limiting spherical cavity, the ball screw nut 345 can be limited to move away from the ball support 342 to break away from the ball support 342. The limiting spherical cavity of the transmission gear 346 does not provide support force for the ball screw nut 345, but only provides a limiting effect.

[0073] It should be noted that the supporting spherical cavity and the limiting spherical cavity do not necessarily need to fit with the entire spherical surface of the ball screw nut 345, but may fit with part of the spherical surface. In this embodiment, the spherical cavity (i.e., the limiting spherical cavity) is directly provided on the transmission gear 346, because the spherical cavity and the gear part are embodied in one component, the position accuracy of the limiting spherical cavity and the gear part of the transmission gear 346 is ensured.

[0074] The transmission gear 346 is torque-connected to the ball screw nut 345, and the end of the ball support 342 away from the transmission gear 346 has a first support portion 3423, and the end of the transmission gear 346 away from the ball support 342 has a second support portion 3462. By installing the first support member 341 on the first support portion 3423 and the second support member 347 on the second support portion 3462, the transmission gear 346 and the ball support 342 are rotatably arranged in the position to be installed.

[0075] The ball head screw nut assembly disclosed in the embodiment of the utility model eliminates a ball head support 342, and a limiting spherical cavity that cooperates with the ball head screw nut 345 is set on the transmission gear 346. The ball head screw nut 345 is installed on a ball head support 342 and supported by the supporting spherical cavity. The transmission gear 346 is set on the side opposite to the ball head support 342, and the limiting spherical cavity is used to abut the ball head screw nut 345 to prevent the ball head screw nut 345 from detaching from the ball head support 342.

[0076] During the rotation of the transmission gear 346, the ball screw nut 345 will be driven to rotate. When the ball screw nut assembly is applied to the electric side door opening drive, it can drive the screw assembly to move back and forth to realize the door opening and closing operation.

[0077] The electric side door opening drive disclosed in the embodiment of the utility model has a ball head nut assembly with one less ball head support 342. Compared with the prior art in which the ball head screw nut 345 is symmetrically arranged between two ball head supports 342, since the ball head screw nut 345 is supported by only one ball head support 342, it is only necessary to process the supporting spherical cavity on one ball head support 342, which makes it easier to ensure accuracy and avoids separately processing the supporting spherical cavity on two ball head supports 342. After the two ball head supports 342 are closed, since the supporting spherical cavity is processed on two components, the accumulated processing errors of the two components will affect the assembly of the ball head screw nut 345 and the two ball head supports 342.

[0078] The utility model only has one ball support 342. In order to prevent the ball screw nut 345 from falling off, a limiting spherical cavity is processed on the transmission gear 346 to abut against a part of the spherical surface of the ball screw nut 345 to prevent the ball screw nut 345 from moving away from the ball support 342. The utility model only provides support force for the ball screw nut 345 through the ball support 342, while the transmission gear 346 does not provide support force. Therefore, it is only necessary to increase the strength of the ball support 342, and the transmission gear 346 only needs to meet the strength required for transmission, and the strength requirement is relatively low. In actual application, the ball support 342 can be made of metal material, and the transmission gear 346 has a lower requirement for material strength because it does not need to provide support force, and can even be made of plastic material. The utility model has lower requirements on the manufacturing process and installation process of each component, and it is easier to ensure the accuracy and reliability of the ball screw nut assembly after assembly.

[0079] Furthermore, the transmission gear 346 at least includes a gear portion 3461 and a second support portion 3462 along the axial direction. The gear portion 3461 is used to receive power input and realize power input by meshing with an external device to drive the ball screw nut 345 to rotate.

[0080] A connecting groove 3463 extending along the axial direction of the gear part 3461 is provided on the end face of the gear part 3461 on the side facing the ball head support 342. The number of the connecting grooves 3463 can be designed according to the needs. Only one can be set, or a plurality of connecting grooves 3463 can be set according to the needs. When a plurality of connecting grooves 3463 are set, each connecting groove 3463 should be arranged at intervals along the circumference of the gear part 3461. For example, they can be evenly arranged along the circumference of the gear part 3461, or divided into multiple groups, each group is evenly arranged, and each group can be provided with one or more.

[0081] The end of the ball support 342 facing the gear portion 3461 is provided with a connecting tooth 3421 inserted into the connecting groove 3463, and the connecting tooth 3421 is arranged in a one-to-one correspondence with the connecting groove 3463. Since the ball support 342 and the transmission gear 346 are cylindrical structures, the connecting tooth 3421 at the end of the ball support 342 can be designed as a curved surface tooth, so as to ensure that it matches the entire shape of the ball support 342. Correspondingly, the connecting groove 3463 should also be a curved surface tooth. When the connecting groove 3463 is a curved surface tooth, its axis can be colinear with the axis of the transmission gear 346.

[0082] In this embodiment, the ball head support 342 and the transmission gear 346 are plugged and matched with the connecting teeth 3421 and the connecting groove 3463, which can not only ensure the coaxiality of the two parts, but also better control the side clearance of the ball head screw nut 345 in the spherical cavity (supporting spherical cavity and limiting spherical cavity). For example, the depth of the connecting teeth 3421 inserted into the connecting groove 3463 can be adjusted, and then the distance between the supporting spherical cavity and the limiting spherical cavity can be adjusted, so that the side clearance of the ball head screw nut 345 in the spherical cavity can be adjusted according to needs.

[0083] The connecting groove 3463 is along the axial direction of the gear portion 3461 and can be designed to penetrate the gear portion 3461 to increase the adjustment range of the length of the connecting tooth 3421 that can be inserted into the connecting groove 3463. It should be noted that the connecting groove 3463 may not penetrate the gear portion 3461, as long as the ball head support 342 and the transmission gear 346 can achieve torque transmission through the cooperation of the connecting tooth 3421 and the connecting groove 3463.

[0084] In a specific embodiment of the utility model, a transmission groove 3451 is provided on the ball screw nut 345, and the transmission groove 3451 extends along the swing direction of the ball screw nut 345. For example, when the door is opened and closed, it needs to deflect along the thickness direction of the door. Therefore, the ball screw nut 345 can follow the deflection to avoid interference during the door opening and closing process. The transmission groove 3451 extends along the swing direction of the ball screw nut 345, and the extension length can ensure that the ball screw nut 345 will not be stuck during the following deflection process during the door opening and closing process.

[0085] The ball support 342 is provided with a transmission hole 3422, and the ball support 342 is connected to the ball screw nut 345 through the transmission pin 344 passing through the transmission hole 3422 and the transmission groove 3451. When the door is swayed during opening and closing, the screw will drive the ball screw nut 345 to follow the swing in the supporting spherical cavity and the limiting spherical cavity. Since the ball support 342 and the transmission gear 346 do not follow the swing, and the transmission pin 344 is inserted in the transmission hole 3422 and does not follow the swing, the transmission groove 3451 is designed as a strip groove extending along the swing direction of the ball screw nut 345, which can ensure that the ball screw nut 345 is not stuck when swinging. The transmission groove 3451 extends only in the swinging direction of the ball screw nut 345 and does not extend in other directions, so that the transmission pin 344 can transmit torque through the transmission groove 3451, so that when the transmission gear 346 rotates, the power can be transmitted to the ball head support 342, and then the power can be transmitted to the ball head screw nut 345 through the ball head support 342.

[0086] It should be noted that the transmission grooves 3451 can be designed to be two symmetrically arranged along the axis of the ball screw nut 345 to ensure the stability of torque transmission. In addition, the transmission hole 3422 is opened on the ball support 342, which does not damage the gear teeth of the gear part 3461 compared to opening the transmission hole 3422 on the transmission gear 346.

[0087] like Figure 4 As shown, in order to prevent the transmission pin 344 from falling off, in a specific embodiment of the utility model, the ball screw nut assembly further includes a radial limiting portion, which is sleeved on the outside of the ball support 342 and covers the transmission pin 344. It should be noted that the radial limiting portion can be a part of the transmission gear 346, that is, the transmission gear 346 is designed with this structure, and after the transmission gear 346 is buckled on the ball screw nut 345, the radial limiting portion on the transmission gear 346 is just sleeved on the outside of the transmission pin 344. It should be noted that the radial limiting portion can also be a clamp or a radial limiting ring 343 set independently of the transmission gear 346.

[0088] One end of the radial limiting ring 343 abuts against the first support member 341 on the first support portion 3423, and the other end abuts against the end face of the gear portion 3461. The radial limiting ring 343 is limited by the end faces of the first support member 341 and the gear portion 3461. It should be noted that the radial limiting ring 343 is arranged between the first support member 341 and the gear portion 3461, and may not abut against the two, allowing the radial limiting ring 343 to generate a certain range of axial displacement between the two, as long as the displacement range can prevent the radial limiting ring 343 from disengaging from the transmission pin 344.

[0089] In a specific embodiment of the utility model, along the axial direction of the ball support 342, the axial middle area of ​​the gear portion 3461 and the axial middle area of ​​the ball screw nut 345 are staggered. That is, in this embodiment, the ball screw nut 345 is offset relative to the center of the gear portion 3461, so the gear portion 3461 can avoid the influence of the radial dimensions of the ball support 342 and the ball screw nut 345, and the radial dimensions of the ball support 342 and the ball screw nut 345 can be appropriately increased to improve the strength of the ball support 342 and the ball screw nut 345.

[0090] Furthermore, the end of the ball head support 342 away from the transmission gear 346 has a first support portion 3423, and the end of the transmission gear 346 away from the ball head support 342 has a second support portion 3462. The first support portion 3423 is sleeved with a first support member 341, and the second support member 347 is sleeved with a second support member 3462, wherein the first support member 341 and the second support member 347 can be bearings or sleeves, as long as the ball head support 342 and the transmission gear 346 can be rotatably supported.

[0091] The first support member 341 and the second support member 347 are both supported in the transmission housing 310. Since the support positions of the first support member 341 and the second support member 347 have high tolerance requirements, in this embodiment, the first support member 341 and the second support member 347 are both supported in the transmission housing 310, so that the supporting cylindrical surfaces for supporting the first support member 341 and the second support member 347 are both formed on the transmission housing 310, which is easier to process and test, and is convenient for rapid analysis and problem solving. Such a setting can obtain better assembly accuracy.

[0092] like Figure 4 As shown, in this embodiment, the first support member 341 and the second support member 347 are both bearings, the outer ring of the bearing of the first support member 341 is limited by the limiting boss of the transmission housing 310, and the inner ring of the bearing is limited by the limiting boss of the ball head support 342; the outer ring of the bearing of the second support member 347 is limited by the bearing pressing block 370 detachably fixed to the end of the transmission housing 310, and the inner ring of the bearing is limited by the limiting boss of the transmission gear 346. The transmission housing 310 and the door mounting assembly 200 are respectively fixed at both ends of the transmission housing 310.

[0093] It should be noted that if the connecting tooth 3421 extends out of the connecting groove 3463, that is, the connecting tooth 3421 penetrates the gear portion 3461, the inner ring of the bearing of the second support member 347 can also abut against the connecting tooth 3421, that is, it is limited by the connecting tooth 3421. In this way, the inner rings of the first support member 341 and the second support member 347 are both limited by the ball head support 342, so that the end face of the transmission gear 346 does not bear the axial force of the support member, thereby reducing the strength design requirements for the transmission gear 346.

[0094] In a specific embodiment of the utility model, one end of the bearing pressing block 370 is connected to the transmission housing 310, and the other end is provided with a dust cover assembly 400, and the dust cover assembly 400 may include a dust cover 420 and a sealing gasket 410. One end of the dust cover 420 has an opening and the other end is closed. The open end of the dust cover 420 is connected to the bearing pressing block 370, so that the screw rod 150 can be hidden in the dust cover 420. A sealing gasket 410 is provided between the dust cover 420 and the bearing pressing block 370, so that the inside of the dust cover 420 is sealed to prevent dust from entering.

[0095] The bearing pressing block 370 and the transmission housing 310 can be connected by threaded matching, and the threaded connection can adjust the pressing force on the second support member 347 according to the needs. The bearing pressing block 370 and the dust cover 420 can be connected by a buckle. For example, a buckle is provided on one of the bearing pressing block 370 and the dust cover 420, and a slot connected to the buckle is provided on the other.

[0096] In a specific embodiment of the utility model, the screw assembly 100 includes a screw 150 and a vehicle body mounting bracket 110. The vehicle body mounting bracket 110 is rotatably arranged at one end of the screw 150, and the vehicle body mounting bracket 110 is used to connect with the vehicle body. Specifically, the vehicle body mounting bracket 110 is arranged at one end of the screw 150 through a screw adapter shaft 140, the screw adapter shaft 140 is fixed to one end of the screw 150, and the vehicle body mounting bracket 110 is hinged to the screw adapter shaft 140 through a hinge shaft 130. A bushing 120 can be sleeved on the hinge shaft 130 to reduce the friction when the vehicle body mounting bracket 110 rotates.

[0097] In a specific embodiment of the utility model, the door mounting assembly 200 includes a door mounting bracket 210 and a bellows 220. Among them, the first end of the door mounting bracket 210 is fixed to the transmission housing 310, and the second end is in an open state, so that one end of the screw assembly 100 used to connect to the vehicle body can extend out. In order to ensure that when the screw assembly 100 deflects, it will not interfere with the mounting bracket 210, the inner cavity of the mounting bracket 210 can be designed as a conical cavity, and the inner mirror gradually increases in the direction from the first end to the second end of the door mounting bracket 210. It should be noted that the inner cavity of the mounting bracket 210 may not be set as a conical cavity, as long as the size is large enough, it will not interfere with the screw assembly 100, and affect the deflection of the screw assembly 100.

[0098] One side of the bellows 220 can be connected to the door mounting bracket 210 by interference fit, and the door mounting bracket 210 can be designed with door mounting interface parts such as bolts to achieve fixed connection between the door mounting bracket 210 and the door.

[0099] Since the farther away from the ball screw nut 345, the greater the swing distance of the screw assembly 100, the inner cavity of the mounting bracket 210 is designed as a conical cavity in this embodiment, and the designed inner cavity diameter of the mounting bracket 210 is proportional to the distance to the ball screw nut 345. Such a setting can reduce the volume of the mounting bracket 210, making the electric side door drive more compact.

[0100] In addition, since the screw rod 150 also needs to pass through the ball head support 342 and the transmission gear 346, a tapered hole for avoiding the screw rod 150 needs to be set in the ball head support 342 and the transmission gear 346. The end of the tapered hole away from the ball head screw nut 345 is the large diameter end.

[0101] One end of the bellows 220 is fixed to the first end of the door mounting bracket 210, and the other end is fixed to one end of the screw assembly 100 for connecting with the vehicle body, and the bellows 220 is sleeved on the screw 150. In this embodiment, the bellows 220 is provided so that the part of the screw 150 that moves out of the mounting bracket 210 can be wrapped by the bellows 220, so as to prevent the threaded part of the screw 150 from being damaged by collision with other parts after being separated from the protection of the housing, thereby affecting the cooperation with the ball screw nut 345. The bellows 220 is retractable and can be retracted and contracted as the screw 150 moves.

[0102] The current mass-produced electric side door drivers have two solutions: one with integrated controller and one without integrated controller. Whether the controller is integrated is determined by the customer's requirements. This requires the design of at least two specifications of electric side door drivers, with few shared spare parts, resulting in higher mold costs.

[0103] Based on this, in a specific embodiment of the utility model, the electric side door driver may further include a transfer housing 500, the transfer housing 500 having a first docking portion detachably connected to the transmission housing 310, and a second docking portion detachably connected to the drive device 600. The drive device 600 may be a drive motor, and the motor shaft of the drive motor extends into the transfer housing 500. The transfer housing 500 has a sealing ring 520 that can be set between the transfer housing 500 and the transmission housing 310 for sealing, and correspondingly, a sealing ring 610 can also be set between the transfer housing 500 and the drive device 600 for sealing.

[0104] The adapter housing 500 can be designed in two specifications, one for matching the controller integrated solution, and the other for matching the controller not integrated solution. Figure 8 As shown), it can also be a second adapter housing 530 (as shown Fig. 9 shown).

[0105] Even if the controller is not integrated, the interaction of magnetic and electrical signals with the drive device 600 needs to be considered. Based on this, the first adapter housing 510 has a fixed interface for fixing the PCB board assembly 800, and the PCB board assembly 800 is used to connect with the drive device 600 to realize the interaction of magnetic and electrical signals. The first adapter housing 510 is used to implement the solution without integrating the controller.

[0106] The second transfer housing 530 has a fixed interface for fixing the controller assembly 700, and the controller assembly 700 is used to connect with the drive device 600 to realize the interaction of magnetic signals and electrical signals. In this embodiment, by adding a transfer housing 500, and designing two different structures (the first transfer housing 510 and the second transfer housing 530) of the transfer housing 500 according to whether the controller is integrated, the other components of the electric side door driver can be shared. By selecting and assembling different transfer housings 500, two solutions of controller integration and controller non-integration can be quickly realized, giving users two choices.

[0107] In a specific embodiment of the present invention, the driving device 600 drives the transmission gear 346 to rotate through the worm assembly 350. It should be noted that the driving device 600 drives the transmission gear 346 to rotate through the gear assembly, as long as the power transmission can be achieved.

[0108] like Figure 5 As shown, the worm assembly 350 at least includes a worm 352 rotatably supported in the transmission housing 310, the worm 352 is transmission-connected to the driving device 600, and meshes with the transmission gear 346. Specifically, the worm 352 is rotatably supported in the transmission housing 310 by a first worm support 351 and a second worm support 354; the first worm support 351 and the second worm support 354 can both be bearings.

[0109] The outer ring of the first worm support 351 is limited by the positioning boss of the transmission housing 310, and the inner ring is positioned by the shoulder of the worm 352; the outer ring of the second worm support 354 is positioned by the hole retaining ring 330, and the inner ring is positioned by the shoulder of the worm 352.

[0110] The motor shaft of the driving device 600 is fixedly connected to one end of the worm 352, and the torque can be transmitted by key connection or profile connection, and a rubber gasket 353 can be provided at the connection. A worm axial limit pin 320 is provided on the transmission housing 310, and the worm axial limit pin 320 can be installed on the transmission housing 310 by threaded engagement to limit the end of the worm 352 away from the driving device 600.

[0111] In this embodiment, the worm 352 and the ball screw nut assembly 340 are both built into the transmission housing 310. The support bearings of the two have high requirements for the tolerance of the inner and outer diameters. They are all supported on a housing part (transmission housing 310), which is easier to process and test, and is convenient for rapid analysis and problem solving. At the same time, the worm 352 and the ball screw nut assembly 340 are installed inside a housing part to form a universal module, which meets whether the controller is integrated and the brushless motor switching strategy.

[0112] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0113] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0114] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0115] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An electric side door driver, characterized in that: It comprises a screw rod assembly (100), a vehicle door installation assembly (200), a transmission housing assembly (300) and a driving device (600), wherein one end of the screw rod assembly (100) is used to be connected to a vehicle body, and the vehicle door installation assembly (200) is used to be connected to a vehicle door; The transmission housing assembly (300) comprises a transmission housing (310) and a ball screw nut assembly (340) rotatably supported in the transmission housing (310), wherein the ball screw nut assembly (340) comprises a ball screw nut (345), a ball support (342) and a transmission gear (346); The ball screw nut (345) is threadedly matched with the screw (150) of the screw assembly (100); the ball support (342) has a supporting spherical cavity that matches with a partial spherical surface of the ball screw nut (345); the ball screw nut (345) is installed in the ball support (342), and the supporting spherical cavity supports the ball screw nut (345); the transmission gear (346) has a spherical cavity that matches with the ball screw The nut (345) is partially spherically matched with a limiting spherical cavity, the transmission gear (346) is arranged on the side of the ball screw nut (345) opposite to the ball support (342), and abuts against the ball screw nut (345) through the limiting spherical cavity, the transmission gear (346) is torque-connected to the ball screw nut (345), and the driving device (600) is used to drive the transmission gear (346) to rotate.

2. The electric side door driver according to claim 1, characterized in that: The end of the ball head support (342) away from the transmission gear (346) has a first support portion (3423), and the end of the transmission gear (346) away from the ball head support (342) has a second support portion (3462); the first support portion (3423) is sleeved with a first support member (341), and the second support portion (3462) is sleeved with a second support member (347); The first support member (341) and the second support member (347) are both supported in the transmission housing (310).

3. The electric side door driver according to claim 2, characterized in that: The first support member (341) and the second support member (347) are both bearings; The outer ring of the bearing of the first support member (341) is limited by the limiting boss of the transmission housing (310), and the inner ring of the bearing is limited by the limiting boss of the ball head support (342); The outer ring of the bearing of the second support member (347) is limited by a bearing pressing block (370) that is detachably fixed to the end of the transmission housing (310), and the inner ring of the bearing is limited by a limiting boss of the transmission gear (346).

4. The electric side door driver according to claim 3, characterized in that: One end of the bearing pressure block (370) is connected to the transmission housing (310), and the other end is connected to a dust cover (420), and the screw rod (150) is hidden in the dust cover (420).

5. The electric side door driver according to claim 2, characterized in that: The transmission gear (346) at least includes a gear portion (3461) and the second support portion (3462) along the axial direction; A connecting groove (3463) extending along the axial direction of the gear part (3461) is provided on the end surface of the gear part (3461) on the side facing the ball head support (342); One end of the ball head support (342) facing the gear portion (3461) is provided with a connecting tooth (3421) inserted into the connecting groove (3463).

6. The electric side door driver according to claim 5, characterized in that: The ball screw nut (345) is provided with a transmission groove (3451), and the transmission groove (3451) extends along the swing direction of the ball screw nut (345); The ball head support (342) is provided with a transmission hole (3422), and the ball head support (342) and the ball head screw nut (345) are connected via a transmission pin (344) passing through the transmission hole (3422) and the transmission groove (3451).

7. The electric side door driver according to claim 6, characterized in that: The ball head nut assembly (340) further comprises a radial limiting portion, which is sleeved on the outside of the ball head support (342) and covers the transmission pin (344).

8. The electric side door driver according to claim 7, characterized in that: The radial limiting portion is a part of the transmission gear (346), or the radial limiting portion is a clamp or a radial limiting ring (343) independently provided on the transmission gear (346).

9. The electric side door driver according to claim 8, characterized in that: One end of the radial limiting ring (343) abuts against the first support member (341) on the first support portion (3423), and the other end abuts against the end surface of the gear portion (3461).

10. The electric side door driver according to any one of claims 5 to 9, characterized in that: The connecting grooves (3463) are multiple and arranged along the circumference of the gear portion (3461); and / or, The connecting groove (3463) penetrates the gear portion (3461) along the axial direction of the gear portion (3461); and / or, Along the axial direction of the ball head support (342), the axial middle area of ​​the gear part (3461) and the axial middle area of ​​the ball head screw nut (345) are offset.

11. The electric side door driver according to claim 1, characterized in that: The screw assembly (100) comprises: The screw rod (150); A vehicle body mounting bracket (110) is rotatably arranged at one end of the screw rod (150), and the vehicle body mounting bracket (110) is used to be connected to the vehicle body.

12. The electric side door driver according to claim 11, characterized in that: The vehicle body mounting bracket (110) is arranged on one end of the screw rod (150) via a screw rod adapter shaft (140), the screw rod adapter shaft (140) is fixed to one end of the screw rod (150), and the vehicle body mounting bracket (110) is hinged to the screw rod adapter shaft (140) via a hinge shaft (130).

13. The electric side door driver according to claim 1, characterized in that: The vehicle door installation assembly (200) comprises: A door mounting bracket (210), a first end of which is fixed to the transmission housing (310), and a second end of which is in an open state so as to allow one end of the screw rod assembly (100) for connection with the vehicle body to extend out; A bellows (220) has one end fixed to a first end of the door mounting bracket (210), and the other end fixed to an end of the screw rod assembly (100) for connection with the vehicle body.

14. The electric side door driver according to claim 1, characterized in that: It also includes a transfer housing (500), wherein the transfer housing (500) and the transmission housing (310) are of an integrated structure, or the transfer housing (500) has a first docking portion that is detachably connected to the transmission housing (310); the transfer housing (500) also has a second docking portion that is detachably connected to the drive device (600).

15. The electric side door driver according to claim 14, characterized in that: The driving device (600) is a driving motor, and the motor shaft of the driving motor extends into the adapter housing (500); The transfer housing (500) is a first transfer housing (510) or a second transfer housing (530), the first transfer housing (510) having a fixing interface for fixing a PCB board assembly (800), and the PCB board assembly (800) is used to connect with the driving device (600) to realize the interaction of magnetic signals and electrical signals; The second adapter housing (530) has a fixing interface for fixing the controller component (700), and the controller component (700) is used to connect with the drive device (600) to realize the interaction of magnetic signals and electrical signals.

16. The electric side door driver according to claim 1, characterized in that: The driving device (600) drives the transmission gear (346) to rotate via the worm assembly (350).

17. The electric side door driver according to claim 16, characterized in that: The worm assembly (350) comprises at least a worm (352) rotatably supported in the transmission housing (310); the worm (352) is transmission-connected to the drive device (600) and meshes with the transmission gear (346).

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