Actuator for electric dampers

Abstract

This utility model discloses an actuator for an electric damper, comprising: a power input shaft and a power output shaft. The power input shaft selectively transmits power to the power output shaft via a clutch assembly. The clutch assembly includes a first clutch and a second clutch, with engagement portions on their opposing end faces. In a matched state, the second clutch moves towards the first clutch, causing it to directly engage with the first clutch through the engagement portion; alternatively, in a misaligned state, the second clutch moves towards the first clutch, pushing it to move together to its limit position. After the second clutch rotates, an elastic element pushes the first clutch to move back to its original position, causing the first and second clutches to engage through the engagement portion. This actuator for an electric damper allows the clutch assembly to engage at any position, ensuring accurate clutch engagement and rapid power transmission.

Description

Technical Field

[0001] This utility model relates to the field of electric actuator technology, and in particular to an actuator for an electric damper. Background Technology

[0002] Currently, the dampers of the main ventilation fans on the surface of coal mines are all driven by electric valve actuators. These actuators have electric switching capabilities, allowing the dampers to be controlled locally or remotely.

[0003] In operation, dampers typically employ one or two sets of electric actuators (hereinafter referred to as actuators) to drive the damper from one side. During operation, actuators sometimes malfunction, and on-site repairs are generally not immediate, making normal switching between fan and standby operation difficult. Prolonged fan downtime also poses a safety hazard to normal airflow through the ductwork. Existing electric actuators have complex structures, and accurate clutch engagement cannot be guaranteed when switching between the active and standby actuators. Utility Model Content

[0004] The technical problem to be solved by this utility model is: In order to solve the technical problems in the prior art, this utility model provides an actuator for electric dampers, wherein the clutch assembly can be engaged at any position to ensure accurate clutch engagement and rapid power transmission.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an actuator for an electric damper, comprising: a power input shaft and a power output shaft. The power input shaft selectively transmits power to the power output shaft through a clutch assembly. The clutch assembly includes a first clutch and a second clutch. The first clutch is connected to the power output shaft via an involute spline and moves horizontally relative to the power output shaft. The second clutch is connected to the power input shaft via an involute and can move horizontally relative to the power input shaft. The opposing end faces of the first clutch and the second clutch have engagement portions. The first clutch is connected to an elastic element. The engagement portion is in a matched state, where the second clutch moves toward the first clutch to directly engage with the first clutch through the engagement portion; or the engagement portion is in a misaligned state, where the second clutch moves toward the first clutch and pushes the first clutch to move together to the limit position and self-lock. After the second clutch rotates, the elastic element pushes the first clutch to move and reset, and the first clutch and the second clutch engage through the engagement portion.

[0006] This utility model is used for the actuator of an electric damper. It achieves automatic engagement by utilizing the axial reset of the first clutch and the circumferential rotation of the second clutch. It does not require the engagement parts to be in a fully aligned state, ensuring that the second clutch and the first clutch can engage accurately under any circumstances.

[0007] Furthermore, in order to realize the power transmission between the first clutch and the second clutch, the engagement part includes at least two pawls and a slot. The engagement part is in a matched state, with the pawl of the first clutch aligned with the slot of the second clutch. The engagement part is in a misaligned state, with at least a portion of the pawl of the first clutch overlapping the pawl of the second clutch in the axial direction.

[0008] Furthermore, in order to ensure smooth movement of the first clutch, a bushing is fixedly connected to the power output shaft. The bushing is located on the left side of the first clutch, and the left end of the first clutch extends into the bushing and is movably engaged with the inner wall of the bushing.

[0009] Furthermore, in order to apply preload to the first clutch and bushing by the elastic element, the left end of the elastic element is connected to the bushing and the right end is connected to the power output shaft.

[0010] Furthermore, to ensure that the elastic element is securely installed, the left end of the elastic element is connected to the end face of the bushing, the power output shaft has a stepped surface extending radially outward, and the right end of the elastic element is connected to the stepped surface.

[0011] Furthermore, in order to reduce the wear on the bushing and the first clutch during rotation, a first bearing is provided at the rear end of the stepped surface, the inner ring of the first bearing abuts against the stepped surface, and a second bearing is provided at the front end of the bushing, the second bearing is connected to the power output shaft, and the inner ring of the second bearing abuts against the bushing.

[0012] Furthermore, in order to drive the second clutch to move, the second clutch is arranged perpendicular to the gear shaft, and the second clutch has an annular tooth groove in the circumferential direction. The annular tooth groove meshes with the gear shaft, and the gear shaft rotates to drive the second clutch to translate.

[0013] Furthermore, in order to ensure the retraction stroke of the second clutch, the power input shaft has a limiting end face, which is located behind the second clutch and is spaced apart from the right end face of the second clutch.

[0014] Furthermore, in order for the actuator to output power, the power input shaft is connected to the active electric device, and the gear shaft is connected to the switching electric device.

[0015] Furthermore, to prevent the power input shaft from being transmitted in reverse to the power output shaft, the power input shaft and the power output shaft are connected by bearings. When the first clutch and the second clutch are disengaged, the power input shaft and the power output shaft rotate relative to each other through the bearings.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model is used for the actuator of an electric damper. When the first clutch and the second clutch are engaged, they can move axially, avoiding the problem that the first clutch and the second clutch cannot engage when the engagement parts are not aligned, and ensuring that the first clutch and the second clutch can engage at any relative position in the circumferential direction.

[0018] 2. The actuator of this utility model for electric damper guides the first clutch through the bushing, and at the same time, with the preload of the elastic element, ensures that the bushing, elastic element, first clutch and power output shaft are in a state of synchronous rotation.

[0019] 3. This utility model is used as an actuator for an electric damper. It utilizes the preload of the elastic element to press the bushing onto the inner ring of the second bearing and press the first clutch onto the inner ring of the first bearing, thereby preventing wear caused by the rotation of the bushing and the first clutch. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the actuator of this utility model;

[0022] Figure 2 This is a cross-sectional view of the actuator;

[0023] In the diagram: 1. Actuator; 11. Power input shaft; 12. Power output shaft; 13. Clutch assembly; 131. First clutch; 132. Second clutch; 133. Elastic element; 134. Engaging part; 1341. Claw; 1342. Slot; 135. Bearing; 136. Bushing; 137. First bearing; 138. Second bearing; 139. Gear shaft; 14. Active electric actuator; 15. Switching electric actuator. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1 As shown, an actuator for an electric damper is disclosed. The actuator 1 includes a power input shaft 11 and a power output shaft 12. Power from the power input shaft 11 is selectively transmitted to the power output shaft 12 via a clutch assembly 13. The clutch assembly 13 serves to transmit or disconnect power. The power input shaft 11 is connected to an active electric device 14, which outputs power to the power input shaft 11.

[0028] Preferably, since the power output shaft 12 and the power input shaft 11 cannot be directly connected, and coaxiality between them needs to be ensured, this application processes a blind hole at the end of the power output shaft 12 and installs a bearing 135, preferably a needle roller bearing, within the blind hole. Connecting the front end of the power input shaft 11 to the needle roller bearing ensures coaxial assembly of the power input shaft 11 and the power output shaft 12. Furthermore, when the first clutch 131 and the second clutch 132 are disengaged, power is not transmitted between the power input shaft 11 and the power output shaft 12 via the needle roller bearing, and the power output shaft 12 remains in an idling state.

[0029] Specifically, the engagement part 134 includes at least two jaws 1341 and a groove 1342. When the jaws 1341 are engaged with the grooves 1342, the first clutch 131 and the second clutch 132 are engaged. In this embodiment, a two-jaw clutch is used, but a three-jaw or four-jaw clutch can achieve the same function.

[0030] The end faces of the first clutch 131 and the second clutch 132 exist in two states. In the first state, the engagement portion 134 is in a matched state, that is, the slot 1342 and the pawl 1341 correspond one-to-one. In the second state, the engagement portion 134 is in a misaligned state, that is, the slot 1342 and the pawl 1341 are misaligned.

[0031] In the first state, after the second clutch 132 moves toward the first clutch 131 to the engagement position, the second clutch 132 and the first clutch 131 directly engage, and at this time the second actuator 2 can realize power transmission.

[0032] In the second state, after the second clutch 132 moves a certain distance toward the first clutch 131, due to the thickness of the pawl 1341, the pawls 1341 of the first clutch 131 and the second clutch 132 will first contact each other. Since the second clutch 132 has not yet moved to the engagement position, at this time the second clutch 132 will synchronously push the first clutch 131 to move. Figure 2 The middle arrow 'a' indicates the leftward limit of the first clutch 131's movement, continuing until the second clutch 132 reaches its limit, at which point it self-locks. Although the pawls 1341 are still in contact, meaning the first clutch 131 and the second clutch 132 are not fully engaged, the second actuator 2 can be directly activated. The power input shaft 11 drives the second clutch 132 to rotate. After the second clutch 132 rotates a certain angle, the pawls 1341 of the first clutch 131 and the second clutch 132 will disengage. Under the action of the elastic element 133, the first clutch 131 is pushed back to its original position, completing the engagement of the first clutch 131 and the second clutch 132. The power from the second actuator 2 is output to the damper 5 through the bevel gear reducer. Since it is impossible to predict when the main actuator will fail or the location of the damper 5 at the time of failure, based on the clutch assembly 13's clutch structure, there is no need to determine the location of the damper 5. It is only necessary to switch to the backup actuator. The backup actuator can automatically switch to the engaged state during operation. The switching between the main actuator and the backup actuator can be completed in an extremely short time, ensuring that the damper 5 can work smoothly.

[0033] Preferably, the power output shaft 12 is further provided with a bushing 136, which rotates synchronously with the power output shaft 12. The elastic element 133 is preferably a compression spring. One end of the compression spring is connected to the bushing 136, and the other end is connected to the first clutch 131. The bushing 136 and the power output shaft 12 are fixedly connected, so the power output shaft 12, the bushing 136, the compression spring, and the first clutch 131 rotate synchronously as a whole.

[0034] Preferably, the bushing 136 is located at the left end of the first clutch 131, and the left end of the first clutch 131 extends at least partially into the inside of the bushing 136. The first clutch 131 is guided by the bushing 136 when it moves axially relative to the power output shaft 12.

[0035] Preferably, the first clutch 131 also has a stepped surface, and the right end of the compression spring is connected to the stepped surface. The rear end of the stepped surface has a first bearing 137. Due to the preload of the spring, when the power output shaft rotates, the spring will lock the first clutch 131 against the inner ring of the first bearing 137. The first clutch 131 drives the inner ring of the first bearing 137 to rotate synchronously through friction, reducing the wear of the first clutch 131. A second bearing 138 is connected to the middle of the power output shaft 12. The inner ring of the second bearing 138 is connected to the bushing 136 and the power output shaft 12. The first bearing 137 and the second bearing 138 can reduce the wear of the first clutch 131 and the bushing 136 during rotation. The outer rings of both the first bearing 137 and the second bearing 138 are connected to the housing, which will not be described in detail here.

[0036] In Embodiment Two, based on Embodiment One, the second clutch 132 and the gear shaft 139 are arranged perpendicularly. The second clutch 132 has an annular toothed groove in its circumferential direction, and the annular toothed groove meshes with the gear shaft 139. The rotation of the gear shaft 139 drives the second clutch 132 to translate. The gear shaft 139 is connected to the switching electric device 15. The switching electric device 15 has a self-locking function. By driving the gear to rotate through the switching electric device 15, the rotation of the gear shaft 139 drives the second clutch 132 to translate. Since the tooth profiles of the gear shaft 139 and the second clutch 132 are arranged perpendicularly, the rotation of the second clutch 132 will not affect the gear shaft 139.

[0037] In summary, the actuator of this utility model for an electric damper has a clutch assembly that can engage at any position, ensuring accurate clutch engagement and rapid power transmission.

[0038] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. An actuator for an electrically powered damper, comprising: A power input shaft (11) and a power output shaft (12), wherein the power input shaft (11) selectively transmits power to the power output shaft (12) via a clutch assembly (13), characterized in that the clutch assembly (13) includes a first clutch (131) and a second clutch (132), wherein the first clutch (131) is connected to the power output shaft (12) via an involute spline and moves horizontally relative to the power output shaft (12), and the second clutch (132) is connected to the power input shaft (11) via an involute spline and can move horizontally relative to the power input shaft (11), wherein the first clutch (131) and the second clutch (132) have engagement portions (134) on their opposite end faces, and the first clutch (131) is connected to an elastic element (133); When the engagement part (134) is in a matched state, the second clutch (132) moves toward the first clutch (131) so that the second clutch (132) directly engages with the first clutch (131) through the engagement part (134); Alternatively, if the engagement part (134) is in a misaligned state, the second clutch (132) moves toward the first clutch (131) and pushes the first clutch (131) to move together to the limit position and self-lock. After the second clutch (132) rotates, the elastic element (133) pushes the first clutch (131) to move and reset, and makes the first clutch (131) and the second clutch (132) engage through the engagement part (134).

2. An actuator for an electric damper according to claim 1, characterized in that The engagement portion (134) includes at least two pawls (1341) and a slot (1342). The engagement portion (134) is in a matched state, with the pawls (1341) of the first clutch (131) aligned with the slots (1342) of the second clutch (132). The engagement portion (134) is in a misaligned state, with at least a portion of the pawls (1341) of the first clutch (131) overlapping the pawls (1341) of the second clutch (132) in the axial direction.

3. An actuator for an electric damper according to claim 2, characterized in that A bushing (136) is fixedly connected to the power output shaft (12). The bushing (136) is located to the left of the first clutch (131). The left end of the first clutch (131) extends into the bushing (136) and is in movable engagement with the inner wall of the bushing (136).

4. An actuator for an electric damper according to claim 3, characterized in that The left end of the elastic element (133) is connected to the bushing (136), and the right end is connected to the power output shaft (12).

5. An actuator for an electric damper according to claim 4, characterized in that The left end of the elastic element (133) is connected to the end face of the bushing (136), the power output shaft (12) has a stepped surface extending radially outward, and the right end of the elastic element (133) is connected to the stepped surface.

6. An actuator for an electric damper according to claim 5, characterized in that The rear end of the stepped surface is provided with a first bearing (137), the inner ring of the first bearing (137) abuts against the stepped surface, and the front end of the bushing (136) is provided with a second bearing (138), the second bearing (138) is connected to the power output shaft (12), and the inner ring of the second bearing (138) abuts against the bushing (136).

7. An actuator for an electric damper according to any one of claims 1 to 6, characterized in that The second clutch (132) is arranged perpendicularly to the gear shaft (139). The second clutch (132) has an annular tooth groove in the circumferential direction. The annular tooth groove meshes with the gear shaft (139). The gear shaft (139) rotates to drive the second clutch (132) to translate.

8. An actuator for an electric damper according to claim 7, characterized in that The power input shaft (11) has a limiting end face, which is located behind the second clutch (132) and is spaced apart from the right end face of the second clutch.

9. An actuator for an electric damper according to claim 7, characterized in that The power input shaft (11) is connected to the active electric device (14), and the gear shaft (139) is connected to the switching electric device (15), which has a self-locking function.

10. An actuator for an electric damper according to claim 7, characterized in that The power input shaft (11) and the power output shaft (12) are connected by a bearing (135). When the first clutch (131) and the second clutch (132) are disengaged, the power input shaft (11) and the power output shaft (12) rotate relative to each other through the bearing.

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