Electric driving device

Abstract

The utility model relates to an electric driving device, which comprises a driving component, a driving component, a driving component and a driving component, and is characterized in that the driving component comprises a motor and at least one gear pair; the transmission shaft is connected to the driving assembly; the action assembly is connected to the transmission shaft; a housing assembly; the interior of the shell assembly comprises a first cavity and a second cavity, the first cavity and the second cavity are separated through a partition wall, the first cavity is sealed relative to the outside, the second cavity is communicated with the outside, and the driving assembly is located in the first cavity. Different environments are provided for different assemblies, the number of parts needing to be sealed is reduced, sealing between the two cavities in the scheme is easier, the solution has better waterproof performance, and the dynamic waterproof requirement can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an electric drive device. Background Art

[0002] Electric drive devices are widely used in vehicles, generally including a motor as a driving element and one or more transmission pairs as a transmission device. Electric drive devices can be applied to a variety of functions, such as sunroof adjustment, seat adjustment, rearview mirror adjustment, door opening and closing, or combined with vehicle door locks as a drive device for electrically closing or power releasing door locks.

[0003] In recent years, with the rapid development of electric vehicles, electric drive devices have also begun to be applied to the electrical connection devices of rechargeable vehicles. Rechargeable vehicles or electric vehicles here can include pure electric vehicles that are only loaded with electric motors and driven by batteries, and plug-in hybrid vehicles that are equipped with other power elements such as internal combustion engines in addition to electric motors. These vehicles can charge the power battery of the vehicle through an external power supply device, and thus require the use of electrical connection devices. When, for example, a charging gun is inserted into the charging socket of the vehicle, in order to ensure safety, the charging gun needs to be locked to the charging socket to prevent unwanted separation between the two. For this reason, an electric drive device is provided in this electrical connection device so that the electrical connection device cannot be unplugged at will. However, also for the sake of safety, the electric drive device needs to be provided with a manual unlocking or emergency release device that can still be unlocked when the electric drive device cannot be operated electrically.

[0004] To this end, the electric drive device is usually equipped with a housing that encloses a cavity and a transmission mechanism accommodated in the cavity, as well as a locking mechanism and an emergency release device that are at least partially located outside the housing.

[0005] The locking mechanism may include a locking tongue and a driving part for driving the locking tongue, the driving part is generally arranged in the cavity, the housing is generally provided with an opening, and the locking tongue partially extends out of the cavity through the opening from the cavity. However, dirt or moisture can penetrate into the cavity through this opening. Utility Model Content

[0006] One purpose of the utility model is to enhance the sealing performance of the electric drive device so that water, dust and the like from the outside cannot easily enter the interior of the electric drive device to avoid damaging the internal structure thereof.

[0007] To achieve the above purpose, the utility model proposes the following solution.

[0008] An electric drive device, comprising:

[0009] a drive assembly, the drive assembly comprising a motor and at least one gear pair;

[0010] a transmission shaft connected to the drive assembly;

[0011] an action assembly connected to the transmission shaft;

[0012] Shell assembly;

[0013] The shell assembly includes a first cavity and a second cavity, the first cavity and the second cavity are separated by a partition wall, the first cavity is sealed relative to the outside, the second cavity is connected to the outside, and the drive assembly is located in the first cavity.

[0014] According to an embodiment of the present invention, the at least one gear pair includes a first gear pair, a second gear pair and a third gear pair, and the three gear pairs are connected in sequence.

[0015] According to an embodiment of the present invention, the driving gear of the first gear pair is connected to the output shaft of the motor, and the driven gear of the third gear pair is connected to the transmission shaft.

[0016] According to an embodiment of the utility model, a first through hole for the transmission shaft to pass through is provided on the partition wall, and the electric drive device further comprises a sealing device, and the sealing device seals the first cavity relative to the second cavity.

[0017] According to an embodiment of the utility model, the sealing device includes a clamping plate arranged on the transmission shaft and a sealing ring sleeved on the transmission shaft, and the clamping plate abuts the sealing ring against the housing assembly.

[0018] According to an embodiment of the present invention, the sealing device further comprises a support plate, a through hole is arranged in the middle of the support plate, the sealing ring can be accommodated in the through hole and its outer periphery is elastically in contact with the support plate.

[0019] According to one embodiment of the present utility model, the shell assembly includes a shell body, a cover body and a partition plate serving as the partition wall, and the cover body is sealed and connected to the shell body and the end side of the partition plate on one side.

[0020] According to an embodiment of the present utility model, the action component is located in the second cavity and is connected to the transmission shaft.

[0021] According to an embodiment of the present utility model, the action assembly includes an action part, a gear is provided on the transmission shaft, and the action part is meshed with the gear through a rack.

[0022] According to one embodiment of the utility model, the housing assembly is provided with a cutout, an emergency unlocking assembly is provided in the cutout, the emergency unlocking assembly is connected to the transmission shaft and includes a cable portion, and the cable portion extends out of the second cavity through the cutout.

[0023] The electric drive device of the utility model arranges the driving component that needs to be waterproof and dustproof in a sealed first cavity, while the emergency unlocking component and the action component that do not need to be waterproof and dustproof are arranged in the second cavity, thereby providing different environments for different components, reducing the number of parts that need to be sealed, and the sealing between the two chambers in the proposed solution is easier, and the solution has better waterproof performance and can meet the requirements of dynamic waterproofing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0025] Figure 1 A perspective view of an electric drive device according to an exemplary embodiment of the present invention is shown.

[0026] Figure 2 Show Figure 1 The internal schematic diagram of the electric drive device shown is removed from the cover.

[0027] Figure 3 Show Figure 1 The assembly diagram of the transmission shaft and sealing device of the electric drive device is shown.

[0028] Figure 4 Show Figure 1 A schematic diagram of a housing assembly of an electric drive device is shown.

[0029] Figure 5 Show Figure 1 The schematic diagram of the assembly of the actuating components and the emergency unlocking components of the electric drive device is shown.

[0030] Figure 6 Show Figure 1 The schematic diagram of the assembly of the driving component and the action component of the electric drive device shown. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as elements or limitations of the claims unless clearly stated in the claims.

[0032] In the following, terms such as "first", "second", etc. are used to describe the elements of the present application. These terms are only used to distinguish the various elements, and are not used to limit the nature, order or number of these elements. The terms "including" and "having" are used to express an open-ended inclusive meaning, and mean that there may be additional elements / components in addition to the listed elements / components.

[0033] Figure 1 and Figure 2 FIG. 2 shows an electric drive device according to an embodiment of the utility model. Figure 1 and Figure 2 As shown, the electric drive device according to this embodiment includes a housing assembly 1, a drive assembly 2, a transmission shaft 3, an action assembly 4, an emergency unlocking assembly 5 and a sealing device 6. Figure 4 It can be seen that the housing assembly 1 defines a cavity 11, which may include a first cavity 111 and a second cavity 112, and a first through hole 12 is provided between the first cavity 111 and the second cavity 112. A cutout 13 is provided on the housing assembly 1, and its structure and function will be described in detail below. The first cavity 111 and the second cavity 112 are connected through the first through hole 12. The transmission shaft 3 passes through the first through hole 12, so that a portion of it ( Figure 2 The left part of the transmission shaft 3 shown in FIG. 1 is disposed in the first cavity 111, and the other part ( Figure 2The right part of the transmission shaft 3 shown in the figure is arranged in the second cavity 112. The sealing device 6 is arranged at the first through hole 12 and abuts against the housing assembly 1 and the transmission shaft 3, and is used for sealing at the first through hole 12, so that the first cavity 111 becomes a completely sealed structure, and the second cavity 112 is set to an open structure. The drive assembly 2 is arranged in the first cavity 111 and connected to the transmission shaft 3. The action assembly 4 is connected to the transmission shaft 3 in the second cavity 112, and may include an action part 41 (such as a lock tongue), so that the transmission shaft 3 is driven to rotate by the drive assembly 2, and the transmission shaft 3 can drive the action part 41 to unlock or lock. The emergency unlocking assembly 5 is connected to the transmission shaft 3 in the second cavity 112, and may include a cable part 51 extending out of the second cavity 112 through the incision 13, so that when the drive assembly 2 is damaged, for example, the cable part 51 can be used to urgently unlock the electric drive device.

[0034] According to an exemplary embodiment of the sealing device 6, Figure 3 As shown, the sealing device 6 includes a sealing ring 62. Preferably, a clamping plate 61 can also be provided, which is disposed in the second cavity 112 and close to the first through hole 12, and is fixedly connected to the transmission shaft 3 as a whole by integral molding or welding. The sealing ring 62 is elastically sleeved on the transmission shaft 3 and is disposed between the first through hole 12 and the clamping plate 61. The first side surface ( Figure 3 The left side surface shown in the figure abuts against the portion of the housing assembly 1 corresponding to the outer periphery of the first through hole 12, and the second side surface of the sealing ring 62 ( Figure 3 The right side surface shown is in contact with the pressing plate 61, so that the sealing ring 62 can be pressed against the housing assembly 1 through the pressing plate 61, thereby sealing the first cavity 111 at the first through hole 12 to prevent debris such as water, dust, etc. from the second cavity 112 from entering the first cavity 111. Further, the sealing device 6 can also include Figure 4 The support plate 63 shown in the figure has a through hole in the middle thereof, and the sealing ring 62 can be accommodated in the through hole and its outer periphery elastically abuts against the support plate 63, so that even if the sealing ring 62 is slightly worn, the inner periphery of the sealing ring 62 can be tightly pressed against the transmission shaft 3 through the support plate 63. Lubricating grease for reducing the wear of the sealing ring 62 can also be filled between the sealing ring 62 and the support plate 63, and between the sealing ring 62 and the transmission shaft 3, and the loss of part of the lubricating grease can be prevented through the clamping plate 61.

[0035] According to an exemplary embodiment of the housing assembly 1, Figure 4As shown, the housing assembly 1 may include a housing body 14, a cover body 15 and a partition 16. The housing body 14 surrounds a cavity 11 with an upper end that is integrally opened. The partition 16 is connected to the housing body 14, and divides the cavity 11 into a first cavity 111 and a second cavity 112. For example, the partition 16 includes a first section 161 and a second section 162. The first section 161 is composed of Figure 4 The front side wall of the housing body 14 shown extends rearwardly, and the second section 162 is formed by Figure 4 The right side wall of the shell body 14 shown extends to the left and is connected to the first section 161. The first through hole 12 is provided in the first section 161 of the partition 16. In some embodiments, the cover 15 may be provided only at the corresponding position of the first cavity 111, and is sealed and connected to the periphery of the shell body 14 corresponding to the first cavity 111 and the partition 16 by welding or bonding, etc., so that the drive assembly 2 can be accommodated by the sealed first cavity 111, and the action part 41 of the action assembly 4 can also be extended from the opening at the corresponding position of the second cavity 112 that is not closed by the cover 15. Those skilled in the art know that the above description is only an example, and the specific shapes of the shell, the cover and the partition can be set accordingly according to the components contained therein.

[0036] In a preferred embodiment, continue to refer to Figure 4 The cover 15 completely covers the openings at the corresponding positions of the first cavity 111 and the second cavity 112, and is sealed and connected to the shell body 14 and the partition 16 respectively by welding or bonding. The portion of the cover 15 corresponding to the second cavity 112 is provided with a third through hole 151 for the action part 41 to extend out, so that the action part 41 can be simply supported by the cover 15 and the second cavity 112 can be sealed from one side. Since no parts requiring waterproof measures are provided in the second cavity 112, the sealing structure required by the prior art is also omitted between the cover 15 and the action part 41.

[0037] According to a further embodiment of the action component 4, Figure 5 As shown, the action assembly 4 may further include an action gear 42 and an action rack 43. The action gear 42 is integrally formed or mounted on the transmission shaft 3 so as to rotate synchronously with the transmission shaft 3. The action rack 43 is connected to the action part 41 and meshes with the action gear 42. The rotation of the driving assembly 2 can drive the action gear 42 to rotate via the transmission shaft 3. The meshing of the action gear 42 and the action rack 43 can convert the rotational motion of the transmission shaft 3 into the linear motion of the action part 41, thereby driving the action part 41 to rotate. Figure 4 The third through hole 151 is shown to be extended or retracted.

[0038] According to a further embodiment of the emergency unlocking assembly 5, continue to refer to Figure 5The emergency unlocking assembly 5 may further include an unlocking wheel portion 52, which is connected to the transmission shaft 3 and can rotate synchronously with the transmission shaft 3. For example, Figure 4 The unlocking wheel portion 52 is provided with a plug-in plate 521 facing the side where the transmission shaft 3 is located, and a plug-in slot 31 for inserting the plug-in plate 521 is provided on the side of the transmission shaft 3 close to the unlocking wheel portion 52. The cable portion 51 is connected to the periphery of the unlocking wheel portion 52 and is arranged around at least a part of the circumference of the unlocking wheel portion 52. When the action portion 41 cannot be driven to retract into the second cavity 112 by the driving assembly 2, the unlocking wheel portion 52 is rotated by pulling the cable portion 51, and the unlocking wheel portion 52 abuts against one side wall of the plug-in slot 31 in the circumferential direction through the plug-in plate 521, so that the transmission shaft 3 can be driven to rotate, thereby driving the action portion 41 to retract into the second cavity 112 for emergency unlocking. It can be understood that when the unlocking wheel portion 52 is a full-circle structure, the cable portion 51 can be arranged around the wheel surface of the unlocking wheel portion 52 in circles, or it can be arranged around half a circle or a quarter of a circle of the unlocking wheel portion 52. In this embodiment, the unlocking wheel portion 52 is as follows Figure 4 In the semicircular structure shown, the cable is extended along the wheel surface of the unlocking wheel portion 52, which can further save the occupied space of the electric drive device.

[0039] Specifically, continue to refer to Figure 5 The wheel surface of the unlocking wheel portion 52 is provided with a cable groove 522, and at one end of the cable groove 522 ( Figure 5 The lower end of the cable groove 522 shown in FIG. 5 is provided with a mounting groove 523. The cable portion 51 may include a cable body 511 and an end 512 connected to one end of the cable body 511. The cable body 511 is disposed in the cable groove 522 and is provided along the cable groove 522. Figure 5 The upper part shown extends through Figure 4 The cutout 13 is shown protruding, and the end 512 is snapped into the mounting groove 523 to define the relative position of the end of the cable body 511 and the unlocking wheel portion 52 .

[0040] Further, refer to Figure 4 The bottom side wall of the housing body 14 has a protrusion 141 for forming a receiving groove, and the protrusion 141 protrudes into the first cavity 111 and extends along the extension direction of the cable body 511. Figure 4 As shown, the cable body 511 extends in the front-to-back direction, so that the receiving groove extends backward from the cutout 13 to the rear side wall of the shell body 14, which facilitates the arrangement and operation of the cable body 511.

[0041] According to one embodiment of the drive assembly 2, Figure 6As shown, the drive assembly 2 may include a motor 21 and at least one gear pair 22. The at least one gear pair 22 is configured to gradually reduce the rotation speed of the motor 21, and each gear pair 22 may include a driving gear 221 and a driven gear 222 that mesh with each other. For example, Figure 6 At least one gear pair 22 in the motor 21 includes a first gear pair 223, a second gear pair 224 and a third gear pair 225 which are meshed in sequence. The driving gear 221 of the first gear pair 223 is coaxially arranged with the output shaft of the motor 21 and can rotate synchronously. The driven gear 222 of the third gear pair 225 is coaxially arranged with the transmission shaft 3 and can rotate synchronously. Preferably, the first gear pair 223 and the second gear pair 224 are helical gear pairs, and the third gear pair 225 is a spur gear pair.

[0042] Further, continue to refer to Figure 6 The electric drive device may further include a circuit board 7 (such as a PCBA) and an elastic sheet 8. The circuit board 7 is provided with position contacts and fixed to Figure 2 The housing assembly 1 shown in the figure may be the bottom wall of the housing body 14, or may be fixed to the first section 161 of the partition 16. The elastic sheet 8 is fixed to the last driven gear 222 along the power transmission direction, for example Figure 6 The driven gear 222 of the third gear pair 225 shown in the figure can be detachably slidably connected with the position contact. Since the driven gear 222 of the third gear pair 225, the transmission shaft 3 and the unlocking wheel portion 52 can rotate synchronously, whether the unlocking is performed by the motor 21 or the cable body 511, the position of the action portion 41 can be determined based on whether the position contact of the elastic sheet 8 and the circuit board 7 is separated. For example, when the elastic sheet 8 is separated from the position contact of the circuit board 7, the circuit is disconnected and the action portion 41 is in the unlocking position. When the elastic sheet 8 abuts against the position contact of the circuit board 7, the circuit is connected and the action portion 41 is in the locking position. In addition, the rotation angle of the gear can also be determined by the contact position of the elastic sheet 8 and the circuit board 7, and then the position of the lock tongue can be determined, so as to control the motor accordingly.

[0043] As described above, in the electric drive device according to the utility model, the housing assembly 1 is connected to the first cavity 111 and the second cavity 112 through the first through hole 12, and the connection between the partition 16 of the housing assembly 1 and the transmission shaft 3 is sealed by arranging a sealing device 6 at the first through hole 12. The cover body 15 is welded and fixed to the housing body 14 and the partition 16 respectively for sealing, thereby forming a sealed first cavity 111. The housing body 14 is provided with a cutout 13, and the cable portion 51 of the emergency unlocking assembly 5 extends out of the second cavity 112 through the cutout 13. The cover body 15 is provided with a third through hole 151, and the action portion 41 of the action assembly 4 extends out of the second cavity 112 through the third through hole 151. The drive assembly 2 that needs to be waterproof and dustproof is arranged in the sealed first cavity 111, and the emergency unlocking assembly 5 and the action assembly 4 that do not need to be waterproof and dustproof are arranged in the second cavity 112. The sealing ring is arranged at the first through hole 12 of the partition 16. Regardless of whether the sealing ring rotates with the transmission shaft 3, the wear caused is small and even negligible because the transmission shaft 3 rotates slowly and at a small angle.

[0044] As can be seen from the above, the utility model divides the cavity in the shell into two chambers, one of which has a good seal, and it is not easy for external water and dust to enter, while the other chamber is used to accommodate components that must be connected to the outside, such as the zipper of the emergency unlocking device, the lock tongue that needs to be moved, and other components, and these mechanical components themselves do not need to be sealed, thereby reducing the number of sealing components, and the sealing between the two chambers is also easier to achieve, so as to better meet the waterproof requirements of the electric drive device. In addition, this structure also allows the electric drive device to be applicable to a variety of installation positions, without considering the impact of the installation position of components such as the lock tongue on the seal.

[0045] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. An electric drive device, comprising: A drive assembly (2), comprising a motor (21) and at least one gear pair (22); a transmission shaft (3), the transmission shaft being connected to the drive assembly (2); an action component (4), the action component being connected to the transmission shaft (3); Housing assembly (1); It is characterized in that The shell assembly (1) comprises a first cavity (111) and a second cavity (112), wherein the first cavity and the second cavity are separated by a partition wall, the first cavity (111) is sealed relative to the outside, and the second cavity (112) is connected to the outside, and the drive assembly (2) is located in the first cavity (111).

2. The electric drive device according to claim 1, characterized in that: The at least one gear pair (22) comprises a first gear pair (223), a second gear pair (224) and a third gear pair (225), and the three gear pairs are connected in sequence.

3. The electric drive device according to claim 2, characterized in that: The driving gear of the first gear pair (223) is connected to the output shaft of the motor, and the driven gear of the third gear pair (225) is connected to the transmission shaft (3).

4. The electric drive device according to any one of claims 1 to 3, characterized in that: The partition wall is provided with a first through hole (12) for the transmission shaft (3) to pass through, and the electric drive device further comprises a sealing device (6), wherein the sealing device (6) seals the first cavity (111) relative to the second cavity (112).

5. The electric drive device according to claim 4, characterized in that: The sealing device (6) comprises a clamping plate (61) arranged on the transmission shaft (3) and a sealing ring (62) sleeved on the transmission shaft (3); the clamping plate (61) causes the sealing ring (62) to abut against the housing assembly (1).

6. The electric drive device according to claim 5, characterized in that: The sealing device (6) further comprises a support plate (63), a through hole being arranged in the middle of the support plate, the sealing ring being able to be accommodated in the through hole and having its outer periphery elastically abutting against the support plate.

7. The electric drive device according to any one of claims 1 to 3, characterized in that: The shell assembly (1) comprises a shell body (14), a cover body (15) and a partition (16) serving as the partition wall. The cover body (15) is sealedly connected to the shell body (14) and the end side of the partition (16) on one side.

8. The electric drive device according to any one of claims 1 to 3, characterized in that: The action component (4) is located in the second cavity and is connected to the transmission shaft (3).

9. The electric drive device according to claim 7, characterized in that: The action component (4) comprises an action part (41), a gear is arranged on the transmission shaft (3), and the action part (41) is meshed with the gear via a rack.

10. The electric drive device according to any one of claims 1 to 3, characterized in that: The housing assembly (1) is provided with a cutout (13), an emergency unlocking assembly (5) is provided in the cutout, the emergency unlocking assembly (5) is connected to the transmission shaft (3) and comprises a cable portion (51), and the cable portion (51) extends out of the second cavity through the cutout.

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