Adjustable cam assembly of electric actuating mechanism

Abstract

The utility model relates to an adjustable cam assembly of an electric actuating mechanism, which comprises a supporting column body and an adjustable cam sleeved outside the supporting column body and capable of rotating around the supporting column body, the inner wall of the adjustable cam is provided with first inner teeth, and the adjustable cam assembly further comprises a locking mechanism capable of locking the adjustable cam. According to the adjustable cam assembly of the electric actuating mechanism, through the specially-designed locking mechanism, when the adjustable cam does not need to be adjusted, the adjustable cam can be locked, the situation that the control precision is affected by axial rotation of the adjustable cam is avoided, when the adjustable cam needs to be adjusted, the adjustable cam can be controlled to rotate only by pressing a locking shaft of the locking mechanism and driving the locking shaft to rotate, and use is very convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric actuators, in particular to an adjustable cam assembly for an electric actuator mechanism. Background Art

[0002] Electric actuator mechanisms are generally used for opening or closing rotary valves such as butterfly valves, ball valves, and plug valves. In some electric actuator mechanisms, a cam mechanism is used in cooperation with a microswitch to achieve the opening or closing of the valve. For example, a stroke control device for an electric actuator mechanism disclosed in CN209196227U. However, since its cam mechanism does not have a corresponding locking mechanism, axial rotation may occur during use, resulting in its inability to trigger the microswitch. Summary of the Utility Model

[0003] In view of the above problems, the utility model proposes a stroke control device for an electric actuator mechanism that can ensure the triggering accuracy of the microswitch.

[0004] The utility model is realized by the following technical solutions:

[0005] An adjustable cam assembly for an electric actuator mechanism includes a support column body and an adjustable cam sleeved outside the support column body and capable of rotating around the support column body. The inner wall of the adjustable cam has a first internal tooth. The adjustable cam assembly further includes a locking mechanism capable of locking the adjustable cam. The locking mechanism includes a locking gear ring and a locking shaft. The locking gear ring is coaxially sleeved outside the support column body and relatively fixed to the support column body. The inner wall of the locking gear ring has a second internal tooth. The locking shaft is inserted into the support column body and elastically connected to the support column body. The locking shaft can move up and down along the support column body. The locking shaft has external teeth, and the external teeth are respectively engaged with the first internal tooth of the adjustable cam and the second internal tooth of the locking gear ring to realize the relative locking of the adjustable cam and the locking gear ring. Moving the locking shaft up and down can disengage the external teeth from the first internal tooth of the adjustable cam to realize the unlocking of the adjustable cam.

[0006] In order to trigger two microswitches, in a preferred embodiment of the utility model, the adjustable cam includes a first adjustable cam and a second adjustable cam. The locking gear ring includes a first locking gear ring and a second locking gear ring. The locking shaft includes a first locking shaft and a second locking shaft. The first locking gear ring and the first locking shaft can lock the first adjustable cam, and the second locking gear ring and the second locking shaft can lock the second adjustable cam.

[0007] For the convenience of assembly, preferably, the first adjustable cam, the second adjustable cam, the first locking gear ring, and the second locking gear ring are arranged at intervals.

[0008] To facilitate the relative fixation of the locking ring gear and the support column body, a plurality of arc-shaped card slots are axially formed in the support column body, and the inner wall of the locking ring gear has arc-shaped blocks that can be embedded in the arc-shaped card slots.

[0009] To facilitate the installation and movement of the locking shaft, two slots are axially formed in the support column body, and one end of the first locking shaft and the second locking shaft are inserted into the slots and elastically connected to the slots through springs.

[0010] To assemble the adjustable cam, the locking ring gear and the support column body into one body, an end cover that can prevent the adjustable cam and the locking ring gear from sliding axially along the support column body is fixed at one end of the support column body.

[0011] To facilitate the rotation of the locking shaft, an opening groove capable of driving its rotation is formed at one end of the locking shaft, and a through hole capable of communicating with the opening groove is formed in the end cover.

[0012] The beneficial effect of the present utility model is that: through a specially designed locking mechanism, the adjustable cam assembly of this electric actuator can lock the adjustable cam when it does not need to be adjusted, avoiding the influence of its axial rotation on the control accuracy. When the adjustable cam needs to be adjusted, only need to press the locking shaft of the locking mechanism and drive its rotation to control the rotation of the adjustable cam, which is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective structural view of the adjustable cam assembly of the electric actuator of the present utility model;

[0014] Figure 2 is an exploded view of the adjustable cam assembly of the electric actuator of the present utility model;

[0015] Figure 3 is a cross-sectional view of the adjustable cam assembly of the electric actuator of the present utility model;

[0016] Figure 4 is a perspective structural view of the support column body of the present utility model;

[0017] Figure 5 is a perspective structural view of the adjustable cam of the present utility model;

[0018] Figure 6 is a perspective structural view of the locking ring gear of the present utility model;

[0019] Figure 7 is a perspective structural view of the locking shaft of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following describes in detail the preferred embodiments of the present utility model with reference to the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0021] As Figures 1-3 shown, an adjustable cam assembly of an electric actuator includes a support column body 1 and an adjustable cam sleeved outside the support column body 1 and capable of rotating around the support column body 1, a locking mechanism capable of locking the adjustable cam, and an end cover 6 capable of preventing the adjustable cam and the locking gear ring from sliding axially along the support column body 1. The locking mechanism includes a locking gear ring and a locking shaft. Among them, the adjustable cam includes a first adjustable cam 2 and a second adjustable cam 4, the locking gear ring includes a first locking gear ring 3 and a second locking gear ring 5, and the locking shaft includes a first locking shaft 7 and a second locking shaft 8. The first adjustable cam 2 and the second adjustable cam 4 are arranged at intervals with the first locking gear ring 3 and the second locking gear ring 5. The first locking gear ring 3 and the first locking shaft 7 can lock the first adjustable cam 2, and the second locking gear ring 5 and the second locking shaft 8 can lock the second adjustable cam 4.

[0022] Specifically, in combination with Figure 4 the support column body 1 shown, a central hole 102 capable of being connected to the actuator is opened in the center of the support column body 1. A plurality of arc-shaped card slots 103 capable of being engaged with the locking gear ring are opened on the outer wall of the support column body 1 in the axial direction. Teeth 101 are provided at the bottom end of the support column body 1, and a threaded hole 105 is opened at the top end. The end cover 6 can be connected to the threaded hole 105 through a screw 10. Two slots 104 are also opened on the outer wall of the support column body 1 in the axial direction for inserting the two locking shafts.

[0023] Specifically, in combination with Figure 5 the second adjustable cam 4 shown, it is sleeved outside the support column body 1. Its inner wall has first internal teeth 401, and its outer wall has a convex block 402 capable of triggering a micro switch. The structure of the first adjustable cam 2 is basically the same as that of the second adjustable cam 4.

[0024] Specifically, in combination with Figure 6The second locking gear ring 5 shown is sleeved outside the support column 1 and corresponds to the second adjustable cam 4. The inner wall of the second locking gear ring 5 has second internal teeth 501 and an arc-shaped block 502 that can be engaged with the arc-shaped slot 103 of the support column 1. The second locking gear ring 5 can slide up and down along the axis but cannot rotate axially, realizing the relative fixation of the second locking gear ring 5 and the support column 1; the structure of the first locking gear ring 3 is basically the same as that of the second locking gear ring 5.

[0025] Specifically, in combination with Figure 7 the first locking shaft 7 shown, an opening slot 702 capable of driving its rotation is provided at the top end of the first locking shaft 7, and a through hole capable of communicating with the opening slot 702 is provided on the end cover 6. A spring 9 is sleeved at the bottom end of the first locking shaft 7. The bottom end of the first locking shaft 7 can be inserted into the slot 104 of the support column 1, and the first locking shaft 7 is elastically connected to the slot 104 through the spring 9. The first locking shaft 7 can move up and down along the slot 104. External teeth 701 are provided on the outer wall of the first locking shaft 7, and the external teeth 701 are respectively engaged with the first internal teeth of the first adjustable cam 2 and the second internal teeth of the first locking gear ring 3, realizing the relative locking of the adjustable cam and the locking gear ring; the structure of the first locking shaft 8 is basically the same as that of the first locking shaft 7, only with a longer length.

[0026] Before use, the external teeth outside the first locking shaft 7 are respectively engaged with the first internal teeth of the first adjustable cam 2 and the second internal teeth of the first locking gear ring 3, and the external teeth outside the second locking shaft 8 are respectively engaged with the first internal teeth of the second adjustable cam 4 and the second internal teeth of the second locking gear ring 5. At this time, the first adjustable cam 2 and the second adjustable cam 4 cannot rotate axially; when it is necessary to adjust the first adjustable cam 2 and the second adjustable cam 4, only need to press down the first locking shaft 7 and the second locking shaft 8 with a tool, then the external teeth on the first locking shaft 7 and the second locking shaft 8 are disengaged from the second internal teeth of the locking gear ring. At this time, they are still engaged with the first internal teeth of the adjustable cam, so rotating the first locking shaft 7 and the second locking shaft 8 can drive the first adjustable cam 2 and the second adjustable cam 4 to rotate, thereby adjusting the position of the convex block 402.

[0027] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "setting", "provided with", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] Finally, it should be noted that the above embodiments are only specific implementation manners of the present utility model, used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. An adjustable cam assembly of an electric actuator, comprising a support column and an adjustable cam sleeved outside the support column and capable of rotating around the support column, wherein the inner wall of the adjustable cam has a first inner tooth, and is characterized in that: The locking mechanism also includes a locking mechanism capable of locking the adjustable cam, the locking mechanism including a locking gear ring and a locking shaft, the locking gear ring being coaxially sleeved outside the support column and relatively fixed to the support column, the inner wall of the locking gear ring having a second inner tooth, the locking shaft being inserted into the support column and elastically connected to the support column, the locking shaft being able to move up and down along the support column, the locking shaft having external teeth, the external teeth respectively meshing with the first inner teeth of the adjustable cam and the second inner teeth of the locking gear ring to achieve relative locking of the adjustable cam and the locking gear ring, the upward and downward movement of the locking shaft can disengage the external teeth from the first inner teeth of the adjustable cam to achieve unlocking of the adjustable cam.

2. The adjustable cam assembly of the electric actuator according to claim 1, characterized in that: The adjustable cam includes a first adjustable cam and a second adjustable cam, the locking gear ring includes a first locking gear ring and a second locking gear ring, and the locking shaft includes a first locking shaft and a second locking shaft. The first locking gear ring and the first locking shaft can lock the first adjustable cam, and the second locking gear ring and the second locking shaft can lock the second adjustable cam.

3. The adjustable cam assembly of the electric actuator according to claim 2, characterized in that: The first adjustable cam, the second adjustable cam, the first locking gear ring, and the second locking gear ring are arranged at intervals.

4. The adjustable cam assembly of the electric actuator according to claim 2, characterized in that: The support column is axially provided with a plurality of arc-shaped slots, and the inner wall of the locking gear ring is provided with an arc-shaped block capable of being embedded in the arc-shaped slots.

5. The adjustable cam assembly of the electric actuator according to claim 2, characterized in that: The support column is axially provided with two slots, and one end of the first locking shaft and the second locking shaft are inserted into the slots and elastically connected to the slots through springs.

6. The adjustable cam assembly of the electric actuator according to claim 1 or 2, characterized in that: An end cover capable of preventing the adjustable cam and the locking gear ring from sliding along the axial direction of the support column is fixed at one end of the support column.

7. The adjustable cam assembly of the electric actuator according to claim 6, characterized in that: An opening groove capable of driving the locking shaft to rotate is provided at one end of the locking shaft, and a through hole capable of communicating with the opening groove is provided on the end cover.

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