Actuating device

Abstract

The utility model provides an actuating device which comprises the following components: a housing which comprises a bottom wall and a side wall which is not closed in a circumferential direction so as to form an opening; the inner plate is arranged in the shell, so that the inner space of the shell is divided into a first inner space and a second inner space, the second inner space is communicated with the outside through the opening, and a sealing component is arranged between the first inner space and the second inner space, so that the first inner space is not communicated with the outside; and the reciprocating motion component is arranged in the second inner space. According to the utility model, the interior of the actuating device is divided into the space communicated with the outside and the space sealed relative to the outside, and the reciprocating motion component is arranged in the space communicated with the outside, so that the sealing of the motor and a rotary motion element except a lead screw in the transmission mechanism can be ensured; and the sealing performance is also prevented from being influenced by the volume change in the sealing cavity caused by the movement of the reciprocating motion component.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromechanics, and particularly relates to an actuating device. BACKGROUND

[0002] Actuating devices have wide applications. Taking vehicles as an example, with the development of the intelligence of vehicles, many components on vehicles can be actuated; for example, the door lock of a vehicle can be automatically locked or attracted, which will use an actuating device, and the electrification of glove boxes, vehicle-mounted refrigerators and the like of vehicles will also use an actuating device. Generally, an actuating device adopts a combination of a motor and a transmission mechanism. Since the motor and its controller need to meet waterproof requirements as electronic elements, the transmission mechanism also needs to meet certain waterproof requirements to avoid water ingress, and in addition, since the transmission mechanism and the motor are directly connected, if the transmission mechanism is waterlogged, water can also flow to the motor along the transmission mechanism.

[0003] Therefore, it is necessary to develop an actuating device with good waterproof performance. UTILITY MODEL CONTENTS

[0004] In order to at least partially solve the above problems or other problems, the utility model provides the following technical scheme.

[0005] An actuating device comprises:

[0006] A housing comprising a bottom wall and a side wall, the side wall being not closed in a circumferential direction to form an opening;

[0007] An inner plate arranged inside the housing to divide the internal space of the housing into a first internal space and a second internal space, the first internal space being formed by the inner plate and a part of the side wall, the second internal space being formed by the inner plate and the remaining part of the side wall, and the second internal space being in communication with the outside through the opening, and a sealing member being arranged between the first internal space and the second internal space, so that the first internal space is not in communication with the outside;

[0008] A reciprocating member arranged in the second internal space and capable of extending out of the second internal space or retracting into the second internal space through the opening;

[0009] The inner plate comprises a first inner plate perpendicular to the movement direction of the reciprocating member and a second inner plate perpendicular to the first inner plate, and the sealing member is arranged in the first inner plate.

[0010] According to one aspect of the present application, the reciprocating member comprises a first end portion, a second end portion and a connecting portion between the first end portion and the second end portion, and the second end portion is always located outside the housing in the entire stroke of the reciprocating member.

[0011] According to one aspect of the present application, the first end portion is provided with a protrusion or a recess on the surface facing the bottom wall, and the bottom wall is provided with a recess or a protrusion which is matched in shape with the protrusion or the recess on the movement path of the reciprocating member.

[0012] According to one aspect of the present application, the bottom wall is provided with a boss at the opening, and the stroke of the reciprocating member is limited by the boss.

[0013] According to one aspect of the present application, a motor, a toothed member connected with the rotor shaft of the motor and a gear engaged with the toothed member are arranged in the first internal space, wherein the toothed member is a worm or a helical gear, and the gear is a helical gear.

[0014] According to one aspect of the present application, a lead screw which is rotationally fixed with the gear is further included, the lead screw is threadedly connected with the reciprocating member, one end of the lead screw passes through the hole in the first inner plate and is connected with the gear, and the remaining part of the lead screw is located in the second internal space.

[0015] According to one aspect of the present application, the gear comprises a body with teeth, a first protrusion on one side of the body, at least one protrusion is arranged in the circumferential direction of the first protrusion, a space for at least partially accommodating an end member is formed radially inside the body of the gear, and the end member accommodates an elastic element.

[0016] According to one aspect of the present application, the number of protrusions is three, and the three protrusions are distributed at intervals of 120° in the circumferential direction.

[0017] According to one aspect of the present application, the end member has a disc-shaped body, a first annular wall and a second annular wall which are perpendicular to the body and extend from the radial edge of the body are formed on one side of the body, a first gap and a second gap are formed between the first annular wall and the second annular wall, and / or a stop portion for stopping the elastic element is arranged on the first annular wall and the second annular wall.

[0018] According to one aspect of the present application, the elastic element is a coil spring.

[0019] From above, the utility model provides a kind of actuating device, including motor-driven reciprocating motion component, by the inside of actuating device is divided into the space being communicated with outside and the space being sealed relative to outside, and reciprocating motion component is set in the space being communicated with outside, it can guarantee the sealing of motor and the rotary motion element except lead screw in transmission mechanism, also avoid the volume change inside sealing cavity caused by the movement of reciprocating motion component to influence sealing performance.

[0020] Other advantageous features and advantages of the utility model will be described in detail below in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 An internal view of the actuating device according to the utility model is shown after removing the cover component.

[0022] Figure 2 A view of the transmission mechanism of the actuating device according to the utility model is shown.

[0023] Figure 3 A perspective view of the housing of the actuating device according to the utility model is shown.

[0024] Figure 4 A perspective view of the gear of the actuating device according to the utility model is shown from one viewing angle.

[0025] Figure 5 A perspective view of the gear of the actuating device according to the utility model is shown from another viewing angle.

[0026] Figure 6 A perspective view of the end component of the actuating device according to the utility model is shown.

[0027] Figure 7 A perspective view of the reciprocating motion component of the actuating device according to the utility model is shown. DETAILED DESCRIPTION

[0028] Embodiments of the utility model are described below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the utility model and in order to enable one of ordinary skill in the art to implement the utility model. However, it will be apparent to one of ordinary skill in the art that the utility model can be practiced without some of these specific details. In other instances, well-known features have not been described in detail so as not to unnecessarily obscure the utility model. It should be understood that the utility model is not limited in scope to the particular embodiments introduced. In other words, it is contemplated that the utility model can be practiced with any combination of the features and elements described below without regard to whether such features and elements are currently claimed in any particular embodiment. It is therefore contemplated that the following aspects, features, embodiments and advantages are merely illustrative of the utility model and should not be considered limiting in scope.

[0029] In the following description, the description using the terms such as "left", "right", "up", "down", etc. may be used for the convenience of description, and does not form any limitation on the technical solutions of the utility model. In addition, the terms such as "first", "second", etc. are used to describe the elements of the present application in the following, and these terms are only used to distinguish the respective elements, and do not form any limitation on the nature, sequence, order or number of these elements.

[0030] Figure 1 The internal view of the actuating device after removing the cover part according to the utility model is shown. The actuating device has a housing 1, the inside of the housing 1 forms a containing space for containing a transmission mechanism. The housing 1 can be connected with the cover part, thereby forming a closed space. In order to clearly show the arrangement of the transmission mechanism in the housing 1, Figure 1 The cover part is not shown in the middle.

[0031] Figure 2 The view of the transmission mechanism of the actuating device according to the utility model is shown. In combination with Figure 1 And Figure 2 It can be known that the transmission mechanism comprises an electric motor 2 as a power source, a worm 3 connected with the rotor shaft of the electric motor 2, a gear 4 engaged with the worm 3, a lead screw 6 rotationally fixed with the gear 4, and a reciprocating member 7 threadedly connected with the lead screw 6. The lead screw 6 receives the rotary motion from the electric motor, rotates by itself, and is engaged with the reciprocating member 7 through the thread. Since the reciprocating member 7 cannot rotate, the rotary motion is converted into reciprocating motion, and further drives other components such as a lever or a pull wire, and can be further connected to movable components such as a glove box, a car refrigerator, a door lock, etc. In order to provide the electric motor with the power required for operation and control signals, an interface device is further arranged on the upper right part of the housing 1 shown, Figure 1 It is known to those skilled in the art that the gear 4 generally adopts a helical gear, and the worm 3 can also be replaced by a helical gear.

[0032] Figure 3 The perspective view of the housing of the actuating device according to the utility model is shown. From Figure 3 It can be known that the housing 1 has a bottom wall and a side wall extending substantially perpendicularly to the bottom wall. The side wall is not closed in the circumferential direction, but has an opening. In the inside of the housing 1, two internal spaces are divided, which are referred to as a first internal space and a second internal space. The electric motor 2, the worm 3 and the gear 4 are located in the first internal space, while the lead screw 6 and the reciprocating member 7 are located in the second internal space. The first internal space and the second internal space are separated by an inner plate 11. The inner plate 11 comprises, for example, a first inner plate and a second inner plate which are perpendicular to each other. A hole is arranged on the first inner plate for providing support for the lead screw 6. The inner peripheral wall of the hole formed by the first inner plate is formed as a stepped portion, so that a bearing is arranged thereinFigure 2 The sealing member 8 is shown in the image. (As shown) Figure 2 As shown, the lead screw 6 has an annular portion at one end, and the sealing member 8 is located between the annular portion and the stepped portion of the inner peripheral wall of the inner plate. The second internal space communicates with the outside, while the first internal space is not connected to the outside because it is sealed to the second internal space, thus providing good waterproof and dustproof sealing performance. The second inner plate is perpendicular to the first inner plate and extends to the side wall at the other end. Thus, the first inner plate, the second inner plate, and a part of the side wall form the second internal space, which communicates with the outside through an opening in the side wall. After installation, the reciprocating motion member 7 can extend or retract into the second internal space through this opening. The inner plate 11 can be integrally formed with the housing 1.

[0033] Compared to setting a sealing element on the right side of the reciprocating motion component 7, thus preventing the reciprocating motion component 7 from being in a similar situation... Figure 1 The method of containing the contents within the sealed space in the shown state provides a better separation sealing structure than the previous one. This is because the reciprocating motion of the reciprocating component 7 causes changes in the gas volume inside the sealed cavity, resulting in changes in gas pressure, which is detrimental to the sealing effect. With the solution of this invention, the reciprocating component 7 is located outside the sealed area, which can ensure the sealing of the rotating motion components in the motor and transmission mechanism, except for the lead screw 6, and also avoids the volume changes inside the sealed cavity caused by the movement of the reciprocating component 7, which would affect the sealing performance.

[0034] Figure 4 A perspective view of the gear in the actuation device according to the present invention is shown. In addition to a toothed body, the gear 4 includes a first protrusion 41 on one side of the body and a second protrusion 42 on the other side of the body. The second protrusion 42 has a recess, for example a square recess, for connection to one end of a lead screw 6. Correspondingly, the end of the lead screw 6 is also provided with a matching square structure for insertion into the square recess. Thus, the lead screw 6 and the gear 4 form a rotationally fixed connection, meaning they are fixed to each other in the direction of rotation and cannot rotate relative to each other.

[0035] Figure 5 A perspective view of the gear of the actuating device according to the present invention is shown from another angle. Figure 5 It is understood that three protrusions are provided circumferentially on the first protrusion 41, and these three protrusions are preferably distributed at 120° intervals circumferentially. More preferably, the body of the gear 4 also has radially internally formed for at least partially accommodating (to be combined with the following text) Figure 6 The space of the end member is described in detail. An elastic element, such as a coil spring, is housed in the end member, which in turn is housed in the receiving space of gear 4. One end of the coil spring is located between two of the three protrusions.

[0036] Figure 6 A perspective view of the end component of the actuating device according to the present invention is shown. (In conjunction with...) Figure 1 , Figure 2 , Figure 5 as well as Figure 6 On the side of gear 4 facing away from lead screw 6, an end member 5 is also provided. The end member 5 has a disc-shaped body 51, on one side of which... Figure 6 On the right side, a first annular wall 52 and a second annular wall 53 are formed perpendicular to the body 51 and extending from the radial edge of the body 51. The first annular wall 52 and the second annular wall 53 are not connected, thereby forming a first notch and a second notch. Preferably, the length of the first annular wall 52 is less than the length of the second annular wall 53. In addition, a stop portion is provided on the first annular wall 52 and the second annular wall 53. When the coil spring is received in the radially inner space formed by the first annular wall 52 and the second annular wall 53, the stop portion on the first annular wall 52 and the second annular wall 53 can stop the coil spring axially, preventing it from dislodging from the end member. The other end of the coil spring can be fixed to the first annular wall 52, for example. Specifically, most of the coil spring is located radially inside the first annular wall 52 and the second annular wall 53, while the last coil of the coil spring extends from the first notch between the first annular wall 52 and the second annular wall 53, continues to extend along the first annular wall 52 radially outside, and then folds back to the radially inner side of the first annular wall 52 at the second notch to achieve fixation of that end. By setting a coil spring, the mechanical reset of the reciprocating motion component 7 can be achieved. That is, when the motor 2 drives the reciprocating motion component 7 to push out or pull back—which depends on the initial installation position of the reciprocating motion component 7 of the actuator. Different installation positions can correspond to two different functions of the product: outputting thrust or outputting pull—the coil spring is tensioned or stored. When the power supply to the motor 2 is stopped, the coil spring can release energy and thus drive the reciprocating motion component 7 to reset.

[0037] Figure 7 A perspective view of the reciprocating motion component of the actuation device according to the present invention is shown. (In conjunction with...) Figure 1 and Figure 7It can be seen that the reciprocating member 7 has a first end portion 72, a second end portion 73 and a connecting portion 71 between the first end portion 72 and the second end portion 73. The first end portion 72 has a threaded hole to be connected with the outer thread of the lead screw 6. In addition, the outer contour of the first end portion 72 has two outer surfaces parallel to each other, which respectively abut against the side wall forming the second inner space and the second inner plate, so as to prevent the reciprocating member 7 from rotating. The first end portion 72 is, for example, a quadrangular prism or a hexagonal prism, etc. The first end portion 72 is connected with the second end portion 73 through the connecting portion 71, and the second end portion 73 is connected with the outer component. The connecting portion 71 has, for example, two connecting plates opposite to each other, and the lead screw 6 is accommodated between the two connecting plates.

[0038] As a preferred embodiment of the present application, as shown in Figure 3 In the second inner space, a protrusion or a recess in the form of a rail, etc. is further arranged on the bottom wall of the housing 1, so as to cooperate with the corresponding recess or protrusion on the first end portion 72, thereby limiting the rotation of the reciprocating member 7 and allowing only reciprocating movement, and also guiding the reciprocating movement of the reciprocating member 7. In the second inner space, a boss 12 is further arranged at the opening of the housing 1, and the corresponding end portion of the lead screw 6 is arranged on the boss 12, so that the boss 12 provides support for the end of the lead screw 6 on the one hand, and also realizes the axial positioning of the lead screw 6 on the other hand. At the same time, the boss 12 can also serve as an axial stop component of the reciprocating member 7, preventing it from moving axially beyond the limit and disengaging the threaded portion of the lead screw 6.

[0039] The above description is only an exemplary embodiment related to the spirit and principle of the present application. Those skilled in the art can understand that various changes can be made to the described examples without departing from the spirit and principle, and these changes and their various equivalent ways are all anticipated by the present inventor and fall within the scope defined by the claims of the present application.

Claims

1. An actuation device, characterized by Comprising: a housing (1) comprising a bottom wall and a side wall, the side wall being not closed in the circumferential direction so as to form an opening; an inner plate (11) arranged inside the housing so as to divide the inner space of the housing into a first inner space and a second inner space, the first inner space being formed by the inner plate and a part of the side wall, the second inner space being formed by the inner plate and the remaining part of the side wall, and the second inner space being in communication with the outside through the opening, a sealing member (8) being arranged between the first inner space and the second inner space so as to make the first inner space not in communication with the outside; a reciprocating member (7) arranged in the second inner space and capable of extending out of the second inner space through the opening or retracting into the second inner space; the inner plate comprising a first inner plate perpendicular to the direction of movement of the reciprocating member and a second inner plate perpendicular to the first inner plate, the sealing member being arranged in the first inner plate.

2. The actuating device according to claim 1, wherein the reciprocating member comprises a first end portion (72), a second end portion (73) and a connecting portion (71) between the first end portion and the second end portion, the second end portion always being located outside the housing in the entire stroke of the reciprocating member.

3. The actuating device according to claim 2, wherein the first end portion is provided with a protrusion or a recess on the surface facing the bottom wall, and the bottom wall is provided with a recess or a protrusion on the surface facing the protrusion or the recess of the first end portion in the path of movement of the reciprocating member.

4. The actuating device according to claim 3, wherein the bottom wall is provided with a boss (12) at the opening, and the stroke of the reciprocating member is limited by the boss.

5. The actuating device according to any one of claims 1-4, wherein an electric motor (2) is arranged in the first inner space, a toothed member connected with the rotor shaft of the electric motor (2), a gear wheel (4) engaged with the toothed member, wherein the toothed member is a worm (3) or a helical gear, and the gear wheel (4) is a helical gear.

6. The actuating device according to claim 5, further comprising a lead screw (6) rotationally fixed with the gear wheel, the lead screw being threadedly connected with the reciprocating member, one end of the lead screw passing through a hole in the first inner plate and being connected with the gear wheel, and the remaining part of the lead screw being located in the second inner space.

7. The actuating device according to claim 5, wherein the gear wheel comprises a body with teeth, a first protrusion (41) located on one side of the body, at least one protrusion being arranged in the circumferential direction of the first protrusion, and a space being formed radially inside the body of the gear wheel for at least partially accommodating an end member (5) containing an elastic element.

8. The actuating device according to claim 7, wherein the number of the protrusions is three, and the three protrusions are distributed at intervals of 120° in the circumferential direction. ​ 9. The actuation device according to claim 7, characterized in that said end member has a disc-shaped body (51) on one side of which a first annular wall (52) and a second annular wall (53) are formed, perpendicular to the body and extending from the radial edge of the body, between which a first gap and a second gap are formed; and / or a stop is provided on the first annular wall and the second annular wall for stopping the elastic element.

10. The actuation device according to any one of claims 7-9, characterized in that said elastic element is a coil spring.

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