actuating device

Abstract

The utility model provides a kind of actuating device, comprising: shell;Gear transmission mechanism, gear transmission mechanism is at least partially contained with shell in;First output, first output is connected with gear transmission mechanism transmission, and can be moved under the action of gear transmission mechanism;Gear transmission mechanism includes: motor;Output member, output member is connected with the rotor shaft of motor;First gear, first gear is connected with output member transmission;Worm, worm is coaxially arranged with first gear and can rotate jointly;Second gear, second gear is engaged with worm;Third gear, third gear is coaxially arranged with second gear and can rotate jointly;Fourth gear, fourth gear is engaged with third gear, and fourth gear is connected with first output transmission.The actuating device adopts the form of two-stage helical gear transmission and one-stage worm and gear transmission combination, so that the space arrangement of each transmission element is compact, and the volume is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle technology, and specifically relates to an actuation device. Background Technology

[0002] Actuation devices have applications in many situations. In rechargeable electric vehicles, one application scenario is to place the actuation device near the vehicle's charging port. This locks the charging gun in place when it is inserted, preventing unintentional removal or accidental dislodgement. For example, it prevents accidental removal of the charging gun, ensuring it cannot be pulled out before charging is complete; it prevents electricity theft or vandalism, which is especially important in public charging stations; and it ensures safety by preventing arcing and poor contact caused by movement of the charging gun during high-voltage charging.

[0003] Currently, two types of locking mechanisms are known: electrically controlled locking pins and mechanical locking mechanisms. The electrically controlled locking pin mechanism has an electric locking pin inside the vehicle's charging port. After the charging gun is inserted, the system automatically sends a signal, causing the locking pin to engage with a slot on the charging gun body; unlocking requires issuing an unlock command from inside the vehicle or via an app. The mechanical locking mechanism, on the other hand, uses an insertion and removal action to trigger a spring or slider, causing the locking element to enter a locked state. For electrically controlled locking pin mechanisms, a motor is typically designed with a corresponding transmission device, which drives the locking pin to move. However, this structure is not conducive to vehicle installation because the transmission device occupies a large space. Utility Model Content

[0004] In order to at least partially solve the above-mentioned problems or other problems, the present invention proposes the following technical solutions.

[0005] An actuation device, comprising:

[0006] case;

[0007] A gear transmission mechanism, which is at least partially housed within the housing;

[0008] The first output terminal is connected to the gear transmission mechanism and can move under the action of the gear transmission mechanism;

[0009] The gear transmission mechanism includes:

[0010] Electric motor;

[0011] An output component, which is connected to the rotor shaft of the electric motor;

[0012] A first gear, which is connected to the output component in a transmission manner;

[0013] A worm gear, which is coaxially arranged with the first gear and can rotate together;

[0014] The second gear engages with the worm gear;

[0015] The third gear is coaxially arranged with the second gear and can rotate together;

[0016] The fourth gear engages with the third gear and is connected to the first output end in a transmission manner.

[0017] According to one aspect of the present invention, the first gear, the third gear, and the fourth gear are all helical gears.

[0018] According to one aspect of the present invention, the second gear is a helical gear or a worm gear.

[0019] According to one aspect of the present invention, a linkage mechanism is also provided, the linkage mechanism including a first link and a second link, the fourth gear driving the first link to rotate, the first link driving the second link to move, and the second link driving the first output end to move.

[0020] According to one aspect of the present invention, the fourth gear is rotatable between a first position and a second position, wherein at the first position the fourth gear is at its limit position in a first rotational direction, and at the second position the fourth gear is at its limit position in a second rotational direction.

[0021] According to one aspect of the present invention, when the fourth gear rotates between the first position and the second position, it also passes through a third position, at which the first output end reaches its maximum extension position of reciprocating linear motion.

[0022] According to one aspect of the present invention, a follower is provided, the follower being fixed to the first output terminal;

[0023] A support shaft is provided to support the fourth gear;

[0024] A first cylindrical portion is provided, which is supported on the fourth gear;

[0025] A second cylindrical portion is provided, which is connected to the first cylindrical portion via a connector, and the second cylindrical portion is supported on the driven member.

[0026] According to one aspect of the present invention, a first limiting part is provided, which is fixedly disposed with the fourth gear and is used to limit the fourth gear from exceeding a first position; and / or a second limiting part is fixedly disposed with the fourth gear and is used to limit the fourth gear from exceeding a second position.

[0027] According to one aspect of the present invention, a protrusion is provided on the housing for cooperating with the first limiting portion and / or the second limiting portion.

[0028] According to one aspect of the present invention, a second output terminal is also provided, which is fixedly disposed with the fourth gear.

[0029] The actuation device proposed in this invention adopts a three-stage transmission, combining two stages of helical gear transmission and one stage of worm gear transmission, resulting in a compact spatial arrangement of the various transmission components and a reduced volume. This is particularly advantageous when the actuation device is used as a vehicle charging device, as space requirements are especially important in vehicles.

[0030] In addition, this utility model also uses a linkage mechanism to drive the first output end. By setting the maximum extension position of the first output end and the two extreme positions of the gear of the linkage mechanism, it is possible to prevent the first output end from being pushed back under the action of external force.

[0031] Other advantageous features and benefits of this invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0032] Figure 1 A perspective view of the actuation device according to the present invention is shown.

[0033] Figure 2 A perspective view of the transmission mechanism of the actuation device according to the present invention is shown.

[0034] Figure 3 A perspective view of the motion conversion device of the actuation device according to the present invention is shown.

[0035] Figure 4 A front view of the motion conversion device of the actuation device according to the present invention is shown.

[0036] Figure 5 A perspective view of the gear and linkage mechanism of the motion conversion device of the actuation device according to the present invention is shown.

[0037] Figure 6 This is a view showing the actuation device according to the present invention in the first position.

[0038] Figure 7 This is a view showing the actuation device according to the present invention in the second position. Detailed Implementation

[0039] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, 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 construed as elements or limitations of the claims unless expressly set forth in the claims.

[0040] The descriptions of orientation used in the following description, such as "left," "right," "up," and "down," are for convenience only and are not intended to limit the technical solution of the utility model, unless explicitly stated otherwise. Furthermore, the terms "first" and "second," etc., used below to describe elements of this application are only used to distinguish individual elements and are not intended to limit the nature, sequence, order, or number of these elements.

[0041] Figure 1 A perspective view of the actuating device according to the present invention is shown. See also Figure 1 The actuating device has a housing 10 and a transmission mechanism housed within the housing 10. The transmission mechanism has a first output end 20. In a typical application, when the actuating device is used as a locking device for the charging port of an electric vehicle, it is equipped with a locking pin so that the charging gun can be locked and unlocked through the reciprocating linear motion of the locking pin. Therefore, the first output end 20 can be used as the locking pin.

[0042] like Figure 1 As shown, the housing 10 also includes a mounting structure to facilitate the installation of the actuator in the desired position. Furthermore, the actuator includes an interface for connection to external systems. For example, the interface can be connected to an external unit to provide power and control signals to the motor within the actuator.

[0043] Figure 2 A perspective view of the transmission mechanism of the actuation device according to the present invention is shown. See also Figure 2The electric motor 11, serving as the power source, has a rotor shaft, at one end of which an output member 12 is provided. For simplicity, only the rotor shaft is shown of the electric motor 11, omitting components such as the stator, rotor, and motor housing. The output member 12 is preferably in the form of a helical gear. The output member 12 further meshes with a first gear 13. A worm gear 14 is coaxially arranged with the first gear 13, and the worm gear 14 meshes with a second gear 15. Furthermore, a third gear 16 is coaxially arranged with the second gear 15. The third gear 16 further meshes with a fourth gear 17. The fourth gear 17 is kinetically connected to the first output end 20 in a manner to be described in detail below, enabling the fourth gear 17 to drive the first output end 20 in reciprocating linear motion. The first gear 13, second gear 15, third gear 16, and fourth gear 17 are preferably in the form of helical gears. The second gear 15 may also be in the form of a worm gear.

[0044] As shown above, the actuation device's transmission mechanism employs a three-stage transmission, combining two stages of helical gear transmission with a single stage of worm gear transmission. This results in a compact spatial arrangement of the various transmission components, reducing the overall size. This is particularly advantageous when using the actuation device as a vehicle charging station, where space constraints are paramount.

[0045] Preferably, the transmission mechanism also has a second output end 30. The second output end 30 can be connected to the output end of the entire transmission mechanism, namely the fourth gear 17. With the development of electric vehicles, more and more electric vehicles are beginning to be equipped with two charging ports, one for fast charging and one for slow charging. These two charging ports are generally arranged adjacent to each other. Therefore, a charging gun locking function needs to be configured for each charging port. By setting the second output end 30, the second output end can be used to lock the charging gun in the other charging port. Thus, a single actuation device can be used to lock and unlock the two charging ports, without the need for a separate actuation device for each charging port.

[0046] Figure 1 The first output terminal 20 and the second output terminal 30 shown are perpendicular to each other. They can also be set to be parallel to each other or at other angles as needed. Furthermore, a transmission mechanism can be added outside each output terminal to obtain a suitable motion form. For example, other mechanisms can be added outside the second output terminal 30 to convert the rotational motion of the second output terminal 30 into rotational motion in other directions, or to cooperate with a gear and rack mechanism or other mechanisms to change the form and direction of motion.

[0047] Those skilled in the art will understand that, besides installing the actuator on an electric vehicle to lock or unlock the charging gun, the actuator of this invention can also be used in other situations. That is, the above description is merely an example of the application of the actuator of this invention, and not a limitation thereof.

[0048] As one specific implementation method, see Figures 3 to 5 This utility model proposes a new motion conversion device. Figure 3 A perspective view of the motion conversion device of the actuation device according to the present invention is shown. Figure 4 A front view of the motion conversion device of the actuation device according to the present invention is shown. Figure 5 A perspective view of the gear and linkage mechanism of the motion conversion device of the actuation device according to the present invention is shown.

[0049] See Figure 3 The fourth gear 17 is configured to include a sector tooth portion 171, that is, it has a sector-shaped tooth portion. When the actuation device is used as a locking device for an electric vehicle charging device, the rotation of the fourth gear 17, which is the end of the transmission mechanism, will not exceed one revolution due to the limited travel of the locking pin. In this case, the use of the sector tooth portion 171 is suitable.

[0050] The fourth gear 17 is also provided with a connecting rod mounting member 172, a support shaft 173 for supporting the fourth gear 17, and a limiting member 174. The second output end 30 can be in the form of a shaft. The support shaft 173 of the fourth gear 17 is coaxially arranged with the second output end 30 and fixedly connected. Thus, when the third gear 17 rotates, it can drive the second output end 30 to rotate, thereby outputting power.

[0051] Further integration Figure 4 It is understood that the limiting member 174 includes a first limiting portion 1741 and a second limiting portion 1742. The limiting member 174 is fixedly connected to the fourth gear 17, and therefore can rotate together with the fourth gear 17. Thus, the first limiting portion 1741 and the second limiting portion 1742 can serve as limiting portions of the fourth gear 17 in two rotational directions. When the fourth gear 17 rotates to a predetermined position, these two limiting portions abut against a protrusion provided on a fixed part, such as the housing 10, thereby limiting the rotational limits of the fourth gear 17 in the two rotational directions.

[0052] exist Figure 3 and Figure 5The example shown also includes a connector 221, a first cylindrical portion 222, and a second cylindrical portion 223. The first cylindrical portion 222 is supported on a linkage mounting member 172. The linkage mounting member 172 is also fixedly connected to the fourth gear 17, allowing it to rotate with the fourth gear 17, thereby causing the first cylindrical portion 222 thereon to rotate about a support shaft 173. The portion between the support shaft 173 and the first cylindrical portion 222 can be considered as a first link. The first cylindrical portion 222 can then drive the second cylindrical portion 223 to rotate about the first cylindrical portion 222 via the connector 221. The portion between the first cylindrical portion 222 and the second cylindrical portion 223 can be considered as a second link. The second cylindrical portion 223 can be supported, for example, at both ends on a driven member 21. The driven member 21 is fixedly connected to a first output end 20. Since the first output end 20 can extend through an opening in the housing 10, the movement of the driven member 21 is constrained. Furthermore, the driven member 21 can cooperate with other fixed components, such as guide rails mounted on the housing 10, so that the driven member 21 can only perform linear motion. When the second cylindrical part 223 moves under the drive of the first cylindrical part 222, it can drive the driven member 21 and the first output end 20 to perform linear motion. Thus, by rotating the motor 11 forward and backward, the extension and retraction of the first output end 20 are realized, and the locking and unlocking of the charging gun are realized accordingly.

[0053] Figure 6 This diagram shows a view of the actuation device according to the present invention in its first position. Figure 6 As shown, the fourth gear is in its extreme position in the counterclockwise rotation direction, and the first output end 20 is also preferably in its extreme position in the retraction motion. Therefore, the first position can also be called the starting position. At this time, one of the first limiting part and the second limiting part is aligned with one side of the protrusion on the housing 10— Figure 6 The middle is the right side—abutting, to prevent the fourth gear 17 from being in a certain direction—in Figure 6 The position shown represents a continued counter-clockwise rotation.

[0054] Figure 6 The diagram also shows the first intersection point O1 of the axis of the support shaft 173 with the paper or other plane perpendicular to the axis, the second intersection point O2 of the first cylindrical portion 222 with the paper, and the third intersection point O3 of the second cylindrical portion 223 with the paper.

[0055] Figure 7 This is a view showing the actuation device according to the present invention in the second position. From Figure 6 Starting from the indicated position, the motor 11 begins to rotate, which in turn drives the fourth gear 17 to rotate clockwise via the transmission mechanism. The fourth gear 17 then drives the first cylindrical part 222, the second cylindrical part 223, and the driven member 21 to move, ultimately reaching... Figure 7The second position is shown. In the second position, the other of the first and second limiting portions is opposite to the protrusion on the housing 10— Figure 7 The left side is in contact with the gear to prevent the fourth gear 17 from continuing to rotate clockwise. At this time, if an external force is applied to the end of the first output terminal and tries to push the first output terminal back along the direction of the reciprocating motion of the first output terminal, the fourth gear 17 will tend to continue to move clockwise. However, since the fourth gear is already blocked, it cannot continue to rotate clockwise, thus preventing the external force from pushing the first output terminal back.

[0056] like Figure 7 As shown, before the fourth gear 17 rotates clockwise to reach the second position, there is a third position. In the third position, the first and second connecting rods are collinear, and the first output end reaches its maximum extension position in its extension direction. Subsequently, the fourth gear 17 continues to rotate a very small angle, for example, no more than 10° or no more than 5°, and then reaches the second position. Figure 7 The diagram shows the line connecting the first intersection point O1 and the third intersection point O3. At this point, the second intersection point O2 is no longer collinear with the other two intersection points.

[0057] Since the fourth gear stops only after reaching the second position under the action of the motor, the first output end has already retracted compared to its maximum extension length. Therefore, on the one hand, if the force acting on the first output end wants to continue pushing it back, as described above, the fourth gear will be stopped and unable to continue rotating, preventing the first output end from retracting further. On the other hand, if an external force tries to pull the first output end outward to its maximum extension length and then push it back, since the first and second connecting rods are collinear when the first output end reaches its maximum extension length, the component of the external force along the direction of the second connecting rod passes through the first intersection point O1, thus failing to drive the fourth gear to rotate. Therefore, the first output end also cannot be retracted in this way. Therefore, this invention, by setting the second position beyond the third position, ensures that the first output end cannot be retracted regardless of the external force acting on it, guaranteeing that it is unaffected by external forces.

[0058] The foregoing description is merely an exemplary embodiment relating to the spirit and principles of this utility model. Those skilled in the art will understand that various changes can be made to the described examples without departing from the spirit and principles, and such changes and their various equivalents are contemplated by the inventors and fall within the scope defined by the claims of this utility model.

Claims

1. An actuating device, comprising: Shell (10); A gear transmission mechanism, which is at least partially housed within the housing (10); The first output end (20) is connected to the gear transmission mechanism and can move under the action of the gear transmission mechanism; Its features are, The gear transmission mechanism includes: Electric motor (11); Output component (12), the output component being connected to the rotor shaft of the motor; The first gear (13) is connected to the output component in a transmission manner; Worm (14), the worm is coaxially arranged with the first gear and can rotate together; The second gear (15) engages with the worm gear, and the second gear is a helical gear or a worm wheel; The third gear (16) is coaxially arranged with the second gear and can rotate together; The fourth gear (17) engages with the third gear and is connected to the first output end (20) in a transmission manner.

2. The actuation device according to claim 1, characterized in that, The first gear, the third gear, and the fourth gear are all helical gears.

3. The actuation device according to claim 2, characterized in that, The second gear is a helical gear.

4. The actuating device according to any one of claims 1-3, characterized in that, A linkage mechanism is also provided, which includes a first link and a second link. The fourth gear (17) drives the first link to rotate, the first link drives the second link to move, and the second link drives the first output end (20) to perform reciprocating linear motion.

5. The actuation device according to claim 4, characterized in that, The fourth gear is rotatable between a first position and a second position. At the first position, the fourth gear is at its limit position in a first rotational direction, and at the second position, the fourth gear is at its limit position in a second rotational direction.

6. The actuation device according to claim 5, characterized in that, When the fourth gear rotates between the first position and the second position, it also passes through the third position, at which the first output end reaches its maximum extension position of reciprocating linear motion.

7. The actuation device according to claim 5 or 6, characterized in that, A follower (21) is provided, and the follower is fixed to the first output terminal; A support shaft (173) is provided to support the fourth gear; A first cylindrical portion (222) is provided, which is supported on the fourth gear; A second cylindrical portion (223) is provided, which is connected to the first cylindrical portion via a connector, and the second cylindrical portion is supported on the driven member.

8. The actuation device according to claim 5 or 6, characterized in that, A first limiting part (1741) is provided, which is fixedly disposed with the fourth gear and is used to limit the fourth gear from exceeding the first position; and / or The second limiting part (1742) is fixedly disposed with the fourth gear and is used to limit the fourth gear from exceeding the second position.

9. The actuation device according to claim 8, characterized in that, The housing is provided with protrusions for engaging with the first limiting part and / or the second limiting part.

10. The actuating device according to any one of claims 1-3, characterized in that, It is also provided with a second output terminal (30), which is fixedly disposed with the fourth gear.

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