Vehicle door actuator and vehicle door assembly

Abstract

The invention provides a vehicle door actuator and a vehicle door assembly. The vehicle door actuator comprises a shell; the limiting arm assembly is arranged in the shell in a sliding mode, and the first end of the limiting arm assembly extends out of the shell; the lead screw is rotatably connected with the second end of the limiting arm assembly; the rotating sleeve is rotationally arranged in the shell, is sleeved with the screw rod and is in transmission fit with the screw rod; the rotating piece is connected with the driving assembly and the rotating sleeve; the driving assembly can drive the rotating sleeve to rotate along with the rotating piece. The lead screw can drive the limiting arm assembly to do reciprocating rectilinear motion along with rotation of the rotating sleeve. In conclusion, in the vehicle door actuator, the driving assembly transmits power to the limiting arm assembly through the rotating piece, the rotating sleeve and the lead screw in sequence, reversing transmission can be achieved, parts in the vehicle door actuator can be conveniently arranged in a mode, and the vehicle door actuator can be conveniently installed on a vehicle door. And meanwhile, the number of parts required for transmission can be reduced, and miniaturization design of the vehicle door actuator is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of vehicle parts, and in particular to a door actuator and a door assembly. Background Art

[0002] The door actuator uses a set of simple mechanical components to realize automatic opening, closing, hovering and other actions of the car door through voice, buttons, electronic display screens and other operations, greatly improving the convenience of operation.

[0003] However, the actuator for automatically opening and closing car doors in the prior art has a complex structure, and has disadvantages such as a large number of parts, a large volume, and a complicated installation process, which leads to high requirements on the internal space of the car door and is not conducive to the installation of the car door actuator. Summary of the invention

[0004] The present invention is made to solve the above technical problems, and its purpose is to provide a door actuator and a door assembly, which can solve the problem that the door actuator is difficult to install in the related art.

[0005] On the one hand, the present application discloses a vehicle door actuator, comprising: a shell; a limit arm assembly slidably arranged in the shell, the first end of the limit arm assembly extending out of the shell; a screw rod, rotatably connected to the second end of the limit arm assembly; a rotating sleeve rotatably arranged in the shell, the rotating sleeve is provided with a screw rod, and cooperates with the screw rod for transmission; a rotating member and a driving assembly, the rotating member is respectively connected to the driving assembly and the rotating sleeve; the driving assembly can drive the rotating sleeve to rotate with the rotating member; the screw rod can drive the limit arm assembly to perform reciprocating linear motion with the rotation of the rotating sleeve.

[0006] Optionally, a first transmission screw hole is provided on the rotating sleeve, and the rotating sleeve is screw-drivenly matched with the screw rod through the first transmission screw hole.

[0007] Optionally, a partition cover is fixed in the shell, the limit arm assembly is located on one side of the partition cover, the screw rod and the rotating sleeve are both arranged on the other side of the partition cover, and the screw rod passes through the partition cover to connect the limit arm assembly.

[0008] Optionally, the partition cover is provided with a second transmission screw hole, and the actuator also includes a screw sleeve, the inner surface of the screw sleeve is provided with a screw hole section, the screw sleeve passes through the rotating sleeve and the partition cover in sequence, and is sleeved with a screw; the screw sleeve is respectively matched with the rotating sleeve transmission, matched with the second transmission screw hole of the partition cover spiral transmission, and matched with the screw screw spiral transmission through the screw hole section; when the rotating sleeve rotates, the screw sleeve rotates and moves back and forth in a straight line, and the screw can drive the limit arm assembly to perform reciprocating linear motion with the rotation of the screw sleeve.

[0009] Optionally, a plurality of screw thread segments are arranged circumferentially on the outer surface of the screw sleeve, and a first guide groove is formed between adjacent screw thread segments; the rotating sleeve is provided with a smooth hole surface which cooperates with the clearance of the screw sleeve, and the smooth hole surface is provided with a first guide strip, and the first guide strip is slidably arranged in the first guide groove; the rotating sleeve drives the screw sleeve to rotate through the first guide strip and the first guide groove, and the screw sleeve cooperates with the partition cover through the screw thread segment spiral transmission.

[0010] Optionally, the screw rod sleeve is provided with a screw hole section and a light hole section which are interconnected, the screw hole section and the light hole section are arranged in sequence in a direction away from the limiting arm assembly, and the light hole section and the screw rod are clearance-matched.

[0011] Optionally, the limit arm assembly includes: a guide ring, which slides with the shell along a first direction; the first direction is the movement direction of the screw rod; a mounting frame, which is arranged in the guide ring; a ball, which is arranged in the mounting frame; a pin, which is sequentially inserted into the guide ring, the mounting frame and the ball; a limit arm, the first end of the limit arm extends out of the shell, and the second end of the limit arm is rotatably mounted on the ball through a through hole arranged thereon; and the screw rod is rotatably connected to the mounting frame.

[0012] Optionally, the inner surface of the shell is provided with a second guide strip extending along the first direction, and the outer peripheral surface of the guide ring is provided with a second guide groove, and the second guide groove can be slidably clamped on the second guide strip.

[0013] Optionally, the inner surface of the guide ring includes arc segments arranged in pairs and plane segments arranged in pairs, and the plane segments and the arc segments are arranged alternately to surround the inner surface of the guide ring; the outer surface of the mounting frame and the plane segments are arranged facing each other, and the mounting frame is limited between the two arc segments.

[0014] In another aspect, the present application discloses a vehicle door assembly including a vehicle door actuator.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present application discloses a vehicle door actuator, comprising: a housing; a limit arm assembly slidably arranged in the housing, wherein the first end of the limit arm assembly extends out of the housing; a screw rod rotatably connected to the second end of the limit arm assembly; a rotating sleeve rotatably arranged in the housing, wherein the screw rod is sleeved on the rotating sleeve and cooperates with the screw rod in transmission; a rotating member and a driving assembly, wherein the rotating member is respectively connected to the driving assembly and the rotating sleeve; the driving assembly can drive the rotating sleeve to rotate with the rotating member; the screw rod can drive the limit arm assembly to perform reciprocating linear motion as the rotating sleeve rotates.

[0017] Since the limit arm assembly is fixed to the vehicle body, when the limit arm assembly is extended relative to the housing, other components of the door actuator, such as the rotating sleeve and the housing, except the limit arm assembly and the screw rod, will move away from the limit arm seat, and the door will open. Conversely, when the limit arm assembly is retracted relative to the housing, other components of the door actuator, except the limit arm assembly and the screw rod, will move toward the limit arm seat, and the door will close.

[0018] In summary, the door actuator in this application, the driving assembly transmits power to the limit arm assembly through the rotating member, the rotating sleeve, and the screw rod in sequence. This reversing transmission method is convenient for the layout of the components in the door actuator, and can make full use of the space inside the door, which is convenient for the installation of the door actuator in the door. At the same time, it can reduce the number of parts required for the transmission, thereby simplifying the installation process of the door actuator and facilitating the miniaturization design of the door actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0020] Figure 1 is a structural diagram of a vehicle door assembly of the present invention;

[0021] Figure 2 The present invention Figure 1 A magnified image of

[0022] Figure 3 is an outline diagram of the actuator of the present invention;

[0023] Figure 4 is an internal structure diagram of an actuator according to a first embodiment of the present invention;

[0024] Figure 5 The present invention Figure 4 AA section view;

[0025] Figure 6 The present invention Figure 4 BB cross-sectional view;

[0026] Figure 7 is a three-dimensional structural diagram of a limit arm assembly according to a first embodiment of the present invention;

[0027] Figure 8 It is a structural diagram of a rotating sleeve according to a first embodiment of the present invention;

[0028] Fig. 9 is a cross-sectional view of the limit arm assembly of the present invention;

[0029] Fig.10 is an assembly relationship diagram between the housing and the guide ring of the present invention;

[0030] Fig.11 It is a structural diagram of the guide ring of the present invention;

[0031] Fig.12 is an internal structure diagram of an actuator according to a second embodiment of the present invention;

[0032] Fig.13 The present invention Fig.12 CC section view;

[0033] Fig.14 is a three-dimensional structural diagram of a limit arm assembly according to a second embodiment of the present invention;

[0034] Fig.15 It is a structural diagram of a screw rod and a screw sleeve according to a second embodiment of the present invention;

[0035] Fig.16 It is an assembly relationship diagram between the screw rod sleeve and related parts of the second embodiment of the present invention;

[0036] Fig.17 The second embodiment of the present invention Fig.16 sectional view of

[0037] Fig.18 is a structural diagram of a rotating sleeve according to a second embodiment of the present invention;

[0038] Fig.19 is a structural diagram of a partition cover according to a second embodiment of the present invention;

[0039] Fig. 20 is an internal structure diagram of an actuator according to a second embodiment of the present invention;

[0040] Fig.21 It is a diagram showing the internal structure of an actuator according to a second embodiment of the present invention.

[0041] Description of reference numerals:

[0042] 100-Door actuator,

[0043] X-first direction, Y-second direction,

[0044] 10- Shell,

[0045] 11-first housing, 111-second guide bar, 12-second housing, 13-partition cover, 131-second transmission screw hole, 14-connecting screw,

[0046] 20-Limiting arm assembly,

[0047] 21-Guide ring,

[0048] 211- second guide groove, 212- arc surface segment, 213- plane segment,

[0049] 22-Mounting frame,

[0050] 221-base frame, 222-limiting lug,

[0051] 23-ball, 24-pin, 25-limit arm, 26-limit arm seat, 27-adjusting pad, 28-stop pin,

[0052] 31-screw rod,

[0053] 32-Turn sleeve,

[0054] 321-first transmission screw hole, 322-smooth hole, 323-first guide strip,

[0055] 33-Rotating parts,

[0056] 34-Drive components,

[0057] 35-Bearings,

[0058] 36-screw screw sleeve,

[0059] 361-screw hole section, 362-screw thread section, 363-first guide groove, 364-light hole section,

[0060] 200-Door assembly. DETAILED DESCRIPTION

[0061] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0062] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0063] The door actuator uses a set of simple mechanical components to realize the automatic opening, closing, hovering and other actions of the car door through voice, buttons, electronic display screens and other operation methods, which greatly improves the convenience of operation. However, the actuator structure of automatic door opening and closing in the prior art is complex, with many parts, large volume and cumbersome installation process, resulting in high requirements for the internal space of the door assembly, which is not conducive to the installation of the door actuator. Therefore, in order to solve such problems, the technical solution of this application is produced. Figure 1 to Figure 21 To elaborate.

[0064] Example 1

[0065] This embodiment discloses a vehicle door actuator 100, which is disposed in a vehicle door 200. Figure 1 and Figure 2 The vehicle door actuator 100 comprises a housing 10, a limiting arm assembly 20 and a transmission mechanism.

[0066] like Figure 1 to Figure 3 As shown, the shell 10 is the installation base of the door actuator 100 and provides a shield protection for the door actuator 100; the shell 10 is arranged in the door 200, and the shell 10 may include a first shell 11 and a second shell 12 that are interconnected, the limit arm assembly 20, the screw rod 31 and the rotating sleeve 32 mentioned later are all arranged in the first shell 11, the rotating member 33 and the driving assembly 34 are arranged in the second shell 12, and the first shell 11 is connected to the door 200 by a connecting screw 14 passed therethrough, and the connecting screw 14 can be arranged in pairs to improve the connection stability.

[0067] like Figure 4 , Figure 5 and Figure 7 As shown, the limit arm assembly 20 is slidably disposed on the housing 10 along a first direction X, and the first direction X can be understood as the movement direction of the screw rod 31, or the movement direction of the door actuator 100. The first end of the limit arm assembly 20 extends out of the housing 10 and is connected to the vehicle body (not shown in the figure) through the limit arm seat 26.

[0068] The transmission mechanism is disposed in the housing 10, and includes a screw 31, a rotating sleeve 32, a rotating member 33 and a driving assembly 34. The extension direction of the limit arm assembly 20 and the extension direction of the screw 31 are both along the first direction X, and the screw 31 is rotatably connected to the second end of the limit arm assembly 20.

[0069] The rotating sleeve 32 is rotatably disposed in the shell 10; in order to achieve smooth rotation of the rotating sleeve 32, two bearings 35 can also be provided in the shell 10, and the bearings 35 are respectively mounted on the front end and the rear end of the rotating sleeve 32; at the same time, the bearings 35 can limit the rotating sleeve 32 along the first direction X to prevent the rotating sleeve 32 from moving along its own axial direction.

[0070] The rotating sleeve 32 is sleeved with the screw rod 31, and the rotating sleeve 32 and the screw rod 31 are in transmission cooperation; specifically, the rotating sleeve 32 is provided with Figure 8 As shown in the first transmission screw hole 321 , the rotating sleeve 32 is screw-drivenly matched with the screw rod 31 through the first transmission screw hole 321 .

[0071] The rotating member 33 is connected to the rotating sleeve 32. For example, the rotating sleeve 32 is a worm gear, the rotating member 33 is a worm, and the rotating member 33 meshes with the rotating sleeve 32. The worm gear transmission pair formed can achieve a large torque output and ensure the stability of power transmission. The driving assembly 34 is connected to the rotating member 33. The driving assembly 34 can be a motor assembly. The motor shaft of the motor assembly is connected to the rotating member 33. The second housing 12 can be understood as a motor housing.

[0072] When the door actuator 100 is working, the power output by the driving assembly 34 is transmitted to the rotating member 33, the rotating sleeve 32, the screw rod 31 and the limit arm assembly 20 in sequence; specifically, the driving assembly 34 can drive the rotating sleeve 32 to rotate with the rotating member 33, and the screw rod 31 can rotate with the rotating sleeve 32 to drive the limit arm assembly 20 to perform reciprocating linear motion.

[0073] Since the limit arm assembly 20 is fixed to the vehicle body, when the limit arm assembly 20 is extended relative to the housing 10, other components of the door actuator 100, such as the rotating sleeve 32 and the housing 10, except for the limit arm assembly 20 and the screw rod 31, will move in a direction away from the limit arm seat 26, for example Figure 4 On the contrary, when the limit arm assembly 20 retracts relative to the housing 10, other components of the door actuator 100 except the limit arm assembly 20 and the screw rod 31 will move toward the direction close to the limit arm seat 26, such as Figure 4 The door 200 moves to the left in the process, and the door 200 will be closed.

[0074] In summary, the door actuator 100 in the present application, the driving assembly 34 transmits power to the limit arm assembly 20 through the rotating member 33, the rotating sleeve 32, and the screw 31 in sequence. For example, in the embodiment 1 of the present application, the worm gear transmission pair composed of the rotating sleeve 32 and the rotating member 33, and the screw transmission pair composed of the screw 31 and the rotating sleeve 32 can switch the power output by the driving assembly 34 from the second direction Y to the first direction X for transmission. Such a switching transmission method is convenient for the layout of the components in the door actuator 100, and can make full use of the space inside the door 200, so as to facilitate the installation of the door actuator 100 in the door 200. At the same time, the number of parts required for transmission can be reduced, thereby simplifying the installation process of the door actuator 100 and facilitating the miniaturization design of the door actuator 100.

[0075] Alternatively, if Figure 4 and Figure 7As shown, a partition cover 13 is fixed in the housing 10. The partition cover 13 divides the inner cavity of the housing 10 into a first cavity and a second cavity. The limit arm assembly 20 is located on one side of the partition cover 13 and is located in the first cavity; the screw rod 31 and the rotating sleeve 32 are both arranged on the other side of the partition cover 13 and are located in the second cavity, and the screw rod 31 passes through the partition cover 13 to connect the limit arm assembly 20. In this way, functional zoning can be achieved, which further facilitates the planning and layout of components.

[0076] The limiting arm assembly 20 is further described below.

[0077] Alternatively, if Figure 7 and Fig. 9 As shown, the limit arm assembly 20 includes a guide ring 21, a mounting frame 22, a ball 23, a latch 24 and a limit arm 25. The guide ring 21 is slidably matched with the housing 10 along the first direction X, thereby guiding the limit arm assembly 20 and preventing the limit arm assembly 20 from deviating from the predetermined path when extending and retracting, thereby improving the transmission accuracy.

[0078] The mounting frame 22 is the mounting base of the limit arm assembly 20, and the mounting frame 22 is arranged in the guide ring 21. The ball 23 is arranged in the mounting frame 22. The latch 24 is sequentially inserted into the guide ring 21, the mounting frame 22 and the ball 23, the latch 24 can be a threaded pin, and the ball 23 can be a spherical nut. The ball 23 and the latch 24 are threadedly connected to improve the position stability.

[0079] The first end of the limit arm 25 extends out of the housing 10, and the first end of the limit arm 25 is rotatably connected to the housing 10. Figure 6 The limiting arm seat 26 is shown, so that the limiting arm 25 is rotatably connected to the vehicle body through the limiting arm seat 26; the second end of the limiting arm 25 is rotatably sleeved with the ball 23 through the through hole provided thereon, so that the limiting arm 25 can rotate around the ball 23, increasing the flexibility of the limiting arm 25; at the same time, the limiting arm 25 is plugged with a stop pin 28, and the stop pin 28 is arranged close to the guide ring 21 to limit the swing angle of the limiting arm 25. The screw rod 31 is rotatably connected to the mounting frame 22.

[0080] Optionally, the mounting frame 22 may be a U-shaped snap ring structure. Specifically, the mounting frame 22 includes a base frame 221 and a limiting lug 222, the limiting lug 222 is disposed at both ends of the base frame 221, the ball 23 is disposed between the two limiting lugs 222, and the latch 24 is sequentially inserted into one limiting lug 222, the ball 23 and the other limiting lug 222, thereby limiting the position of the ball 23 and improving the structural stability.

[0081] Optionally, the limit arm assembly 20 further includes a pair of adjustment pads 27. The adjustment pads 27 are arranged in the mounting frame 22, and the ball 23 is located in the spherical area defined between the pair of adjustment pads 27. The second end of the limit arm 25 extends between the pair of adjustment pads 27 and rotatably sleeves the ball 23. The adjustment pads 27 can be made of a soft material such as rubber, and the adjustment pads 27 will fill the gap in the mounting frame 22, so as to ensure that the limit arm 25 can rotate in all directions.

[0082] Alternatively, if Fig.10 and Fig.11 As shown, the inner surface of the shell 10 is provided with a second guide bar 111 extending along the first direction X, and the outer peripheral surface of the guide ring 21 is provided with a second guide groove 211. The second guide groove 211 can be slidably clamped on the second guide bar 111. The guide ring 21 slides with the shell 10 along the first direction X through the second guide groove 211 and the second guide bar 111. This can improve the movement accuracy of the limit arm assembly 20 and prevent abnormal rotation of the guide ring 21.

[0083] Optionally, the second guide bars 111 and the second guide grooves 211 correspond one to one, and a plurality of them may be provided, for example, they are provided in pairs, to further improve movement stability.

[0084] Optionally, the inner surface of the guide ring 21 includes arc segments 212 arranged in pairs and plane segments 213 arranged in pairs, and the plane segments 213 and the arc segments 212 are alternately arranged to surround the inner surface of the guide ring 21. The outer surface of the mounting frame 22 and the plane segments 213 are arranged facing each other, and the mounting frame 22 is limited between the two arc segments 212, so that abnormal rotation of the mounting frame 22 can be prevented.

[0085] Example 2

[0086] This embodiment discloses another door actuator 100, which is different from the door actuator 100 in Embodiment 1 as follows:

[0087] The partition cover 13 is provided with Fig.19 The second transmission screw hole 131 is shown. Fig.12 , Fig.14 and Fig.15 As shown, the actuator 1 also includes a screw sleeve 36, the inner surface of which is provided with a screw hole section 361, the screw sleeve 36 passes through the rotating sleeve 32 and the partition cover 13 in sequence, and the screw sleeve 36 is sleeved with the screw 31. The screw sleeve 36 is respectively matched with the rotating sleeve 32 in transmission, matched with the second transmission screw hole 131 of the partition cover 13 in spiral transmission, and matched with the screw 31 in spiral transmission through the screw hole section 361.

[0088] In this way, the door actuator 100 can achieve two-stage extension and retraction when working, and the specific principle is as follows:

[0089] like Fig.12 and Fig.13 As shown, the rotating member 33 is a worm, and the rotating sleeve 32 is a worm wheel. The rotating member 33 and the rotating sleeve 32 are meshed with each other to form a worm gear transmission pair, and the driving assembly 34 drives the rotating sleeve 32 to rotate through the rotating member 33; when the rotating sleeve 32 rotates, the rotating sleeve 32 can drive the screw sleeve 36 to rotate; when the screw sleeve 36 rotates, it realizes reciprocating linear movement through the spiral transmission cooperation with the second transmission screw hole 131 on the partition cover 13, so that the screw sleeve 36 can be extended and retracted relative to the rotating sleeve 32; and the screw 31 can rotate with the screw sleeve 36, and the screw 31 realizes the reciprocating linear motion of the screw 31 through the spiral transmission cooperation with the screw hole section 361 on the screw sleeve 36, thereby realizing the extension and retraction of the screw 31 relative to the screw sleeve 36, and realizing the screw 31 driving the limit arm assembly 20 to perform reciprocating linear motion.

[0090] It can be seen that in the process of driving the limit arm assembly 20 to move, when the screw sleeve 36 extends out of the rotating sleeve 32, the screw rod 31 will also extend out of the screw sleeve 36; when the screw sleeve 36 retracts relative to the rotating sleeve 32, the screw rod 31 will also retract into the screw sleeve 36, and the screw sleeve 36 and the screw rod 31 are synchronously extended and retracted; compared with the door actuator 100 of Example 1, the two-stage telescopic setting in the door actuator 100 of Example 2 can, on the one hand, reduce its own length along the first direction X while ensuring the telescopic stroke of the limit arm assembly 20, improve the compactness of the structure and the space utilization, and facilitate the further miniaturization of the door actuator 100; on the other hand, since the screw sleeve 36 and the screw rod 31 are synchronously extended and retracted, it can have a faster extension rate than the door actuator 100 of Example 1, thereby improving the response speed.

[0091] Optionally, the rotating sleeve 32 can be configured as in Example 1. Figure 8 The structure shown in the figure, that is, the rotating sleeve 32 is provided with a first transmission screw hole 321 to cooperate with the screw screw sleeve 36 for spiral transmission, but since in this embodiment, the partition cover 13 is also provided with a second transmission screw hole 131, this will increase unnecessary thread contact positions, and it is easy to cause abnormalities such as thread surface wear or transmission jamming. Therefore, the rotating sleeve 32 in Example 2 is different from that in Example 1, as follows:

[0092] like Figure 16 to Figure 18 As shown, a plurality of screw thread segments 362 are circumferentially arranged on the outer surface of the screw sleeve 36 , and a first guide groove 363 is formed between adjacent screw thread segments 362 . For example, the screw thread segments 362 are arranged in pairs, or more screw thread segments 362 are arranged.

[0093] The rotating sleeve 32 is provided with a smooth hole 322 which is clearance-matched with the screw sleeve 36, and the smooth hole 322 is provided with a first guide bar 323, and the first guide bar 323 is slidably arranged in the first guide groove 363; the rotating sleeve 32 drives the screw sleeve 36 to rotate through the first guide bar 323 and the first guide groove 363; the screw sleeve 36 is spirally coupled with the partition cover 13 through the screw thread section 362, thereby realizing reciprocating linear motion.

[0094] This arrangement can reduce the thread contact of the screw sleeve 36 during the transmission process. Specifically, it can avoid the thread contact between the screw sleeve 36 and the rotating sleeve 32. The screw sleeve 36 only has thread contact with the partition cover 13, thereby avoiding excessive wear of the thread surface and ensuring the service life of the door actuator 100. At the same time, due to the arrangement of the first guide bar 323 and the first guide groove 363, on the one hand, the rotating sleeve 32 can effectively drive the screw sleeve 36 to rotate; on the other hand, through the guiding effect of the first guide bar 323 and the first guide groove 363, the reciprocating linear motion accuracy of the screw sleeve 36 can be improved.

[0095] Alternatively, if Fig.15 As shown, the screw sleeve 36 is provided with a screw hole section 361 and a light hole section 364 which are interconnected. The screw hole section 361 and the light hole section 364 are arranged in sequence in a direction away from the limit arm assembly 20. The light hole section 364 and the screw 31 are clearance-matched. In this way, the contact position of the thread can be reduced while ensuring effective transmission, thereby reducing the wear on the thread surface and increasing the service life of the door actuator 100.

[0096] Example 3

[0097] like Fig. 20 As shown, this embodiment discloses a third door actuator 100. This embodiment is another layout design based on the second embodiment. The worm gear pair between the rotating sleeve 32 and the rotating member 33 in the second embodiment is replaced by a gear transmission pair. The details are as follows:

[0098] In this embodiment, the rotating sleeve 32 and the rotating member 33 are both gears. Specifically, the rotating member 33 is a driving gear connected to the motor shaft of the driving component 34, and the rotating sleeve 32 is a driven gear meshing with the rotating member 33. The rotating sleeve 32 and the rotating member 33 form a gear transmission pair. The layout direction of the driving component 34 and the extension direction of the screw rod 31 are both the first direction X. When the driving component 34 rotates, the synchronous extension and retraction of the screw sleeve 36 and the screw rod 31 are achieved through gear transmission.

[0099] Example 4

[0100] like Fig.21As shown, this embodiment discloses a fourth door actuator 100. This embodiment is another layout design based on the embodiment 1. The worm gear pair between the rotating sleeve 32 and the rotating member 33 in the embodiment 1 is replaced by a gear transmission pair, as follows:

[0101] In this embodiment, the rotating sleeve 32 and the rotating member 33 are both gears. Specifically, the rotating member 33 is a driving gear connected to the motor shaft of the driving component 34, and the rotating sleeve 32 is a driven gear meshing with the rotating member 33. The rotating sleeve 32 and the rotating member 33 form a gear transmission pair. The layout direction of the driving component 34 and the extension direction of the screw rod 31 are both the first direction X. When the driving component 34 rotates, the extension and retraction of the screw rod 31 is achieved through gear transmission.

[0102] Example 5

[0103] like Figure 1 and Figure 2 As shown, this embodiment discloses a vehicle door assembly, including a vehicle door actuator 100 and a vehicle door 200. The vehicle door actuator 100 is arranged in the vehicle door 200, and the vehicle door 200 is opened and closed by the ejection and retraction actions of the vehicle door actuator 100.

[0104] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A door actuator, characterized in that: include: Housing (10); A limit arm assembly (20) slidably disposed in the housing (10), wherein a first end of the limit arm assembly (20) extends out of the housing (10); A screw rod (31) rotatably connected to the second end of the limiting arm assembly (20); A rotating sleeve (32) rotatably arranged in the housing (10), wherein the rotating sleeve (32) sleeves the screw rod (31) and is in transmission cooperation with the screw rod (31); A rotating member (33) and a driving assembly (34), wherein the rotating member (33) is respectively connected to the driving assembly (34) and the rotating sleeve (32); The driving assembly (34) is capable of driving the rotating sleeve (32) to rotate along with the rotating member (33); The screw rod (31) can drive the limit arm assembly (20) to perform reciprocating linear motion as the rotating sleeve (32) rotates.

2. The door actuator according to claim 1, characterized in that: The rotating sleeve (32) is provided with a first transmission screw hole (321), and the rotating sleeve (32) is screw-drivenly matched with the screw rod (31) through the first transmission screw hole (321).

3. The door actuator according to claim 1, characterized in that: A partition cover (13) is fixedly arranged in the housing (10). The limit arm assembly (20) is located on one side of the partition cover (13), and the screw rod (31) and the rotating sleeve (32) are both arranged on the other side of the partition cover (13). The screw rod (31) passes through the partition cover (13) to connect to the limit arm assembly (20).

4. The door actuator according to claim 3, characterized in that: The partition cover (13) is provided with a second transmission screw hole (131). The actuator (1) further comprises a screw thread sleeve (36), the inner surface of the screw thread sleeve (36) being provided with a screw hole section (361), the screw thread sleeve (36) passing through the rotating sleeve (32) and the partition cover (13) in sequence, and being sleeved with the screw (31); The screw sleeve (36) is respectively in driving cooperation with the rotating sleeve (32), in spiral driving cooperation with the second driving screw hole (131) of the partition cover (13), and in spiral driving cooperation with the screw (31) through the screw hole section (361); When the rotating sleeve (32) rotates, the screw sleeve (36) rotates and moves back and forth linearly, and the screw (31) can drive the limit arm assembly (20) to move back and forth linearly along with the rotation of the screw sleeve (36).

5. The door actuator according to claim 4, characterized in that: The outer surface of the screw thread sleeve (36) is provided with a plurality of screw thread segments (362) along the circumferential direction, and a first guide groove (363) is provided between adjacent screw thread segments (362); The rotating sleeve (32) is provided with a smooth hole (322) which is clearance-matched with the screw thread sleeve (36), and the smooth hole (322) is provided with a first guide strip (323), and the first guide strip (323) is slidably arranged in the first guide groove (363); The rotating sleeve (32) drives the screw sleeve (36) to rotate via the first guide strip (323) and the first guide groove (363), and the screw sleeve (36) is spirally coupled with the partition cover (13) via the screw thread segment (362).

6. The door actuator according to claim 4, characterized in that: The screw rod sleeve (36) is provided with a screw hole section (361) and a light hole section (364) which are connected to each other. The screw hole section (361) and the light hole section (364) are arranged in sequence in a direction away from the limit arm assembly (20), and the light hole section (364) and the screw rod (31) are clearance-matched.

7. The door actuator according to any one of claims 1 to 6, characterized in that: The limiting arm assembly (20) comprises: A guide ring (21) is slidably matched with the housing (10) along a first direction (X); the first direction (X) is the movement direction of the screw rod (31); A mounting frame (22) is arranged in the guide ring (21); A sphere (23) is disposed in the mounting frame (22); A latch (24) is sequentially inserted into the guide ring (21), the mounting frame (22) and the sphere (23); a limiting arm (25), wherein a first end of the limiting arm (25) extends out of the housing (10), and a second end of the limiting arm (25) is rotatably sleeved on the ball (23) through a through hole provided thereon; The screw rod (31) is rotatably connected to the mounting frame (22).

8. The door actuator according to claim 7, characterized in that: The inner surface of the housing (10) is provided with a second guide strip (111) extending along the first direction (X). The outer peripheral surface of the guide ring (21) is provided with a second guide groove (211), and the second guide groove (211) can be slidably clamped on the second guide strip (111).

9. The door actuator according to claim 7, characterized in that: The inner surface of the guide ring (21) comprises arcuate segments (212) arranged in pairs and plane segments (213) arranged in pairs, wherein the plane segments (213) and the arcuate segments (212) are alternately arranged to enclose the inner surface of the guide ring (21); The outer surface of the mounting frame (22) and the plane section (213) are arranged facing each other, and the mounting frame (22) is limited to be located between the two arc surface sections (212).

10. A vehicle door assembly, characterized in that: A vehicle door actuator comprising any one of claims 1 to 9.

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