Integral straight-stroke electric device

Abstract

The utility model discloses an integral straight-stroke electric device and relates to the technical field of electric actuating mechanisms. Comprising a cover cap and a lower shell which are arranged up and down, and a pair of parallel supporting columns are arranged at the bottom of the lower shell; the device further comprises an upper cover plate, the upper cover plate is arranged at the top of the lower shell and used for separating the cover from the lower shell, a motor, an absolute encoder and an electric control assembly are arranged on the upper cover plate and located in the cover, a gear A, a gear B, a lead screw and a copper nut part are arranged in the lower shell, the motor is connected with the gear A through a key, and the gear B is connected with the lead screw through a key. The gear A is meshed with the gear B, the gear B is connected with the lead screw through a spline, the lead screw is matched with the copper nut component, the copper nut component extends out of the bottom of the lower shell to be connected with the connecting nut through threads, and the connecting nut is connected with a valve rod of a valve. In the working process, the electric control assembly, the motor and the main transmission structure are integrated into a whole, so that the size is reduced, the weight is reduced, and meanwhile the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric actuator technical field especially relates to a whole type straight stroke electric device. BACKGROUND

[0002] At present, most of the straight stroke electric devices on the market adopt the combined structure of multi-rotation electric device and straight stroke component. The stroke control mechanism is on the multi-rotation electric device, and the stroke measurement of the final output push rod is open-loop control, which leads to low control precision, especially the control precision of small thrust and short stroke actuator cannot meet the user's requirements, and there are problems such as large size, high cost, limited installation position and the like. INVENTION CONTENTS

[0003] The utility model provides a whole type straight stroke electric device that simple structure is convenient reliable to solve above -mentioned technical problem.

[0004] The utility model discloses a whole type straight stroke electric device, including the cover and lower casing that set up up and down, the bottom of lower casing is equipped with a pair of parallel support column,

[0005] Still include the upper cover, the upper cover is located in the top of lower casing, is used for separating cover and lower casing,

[0006] The motor, absolute encoder and electric control assembly are equipped on the upper cover and located in the cover,

[0007] Gear A, gear B, screw rod and copper nut component are equipped in the lower casing,

[0008] The motor is connected with gear A through the key, gear A is engaged with gear B, gear B is connected with screw rod through the spline, screw rod cooperates with copper nut component, the bottom of copper nut component is connected with connecting nut through thread connection, and connecting nut is connected with valve stem,

[0009] The bottom of copper nut component is equipped with guide sliding block respectively, and guide sliding block cooperates with support column,

[0010] Gear B is engaged with the gear of stroke component, and is used for transmitting the rotary motion of screw rod to absolute encoder.

[0011] Still include the nut, the nut is located above gear B, and the nut is installed at the top end of screw rod.

[0012] Still include thrust ball bearing, and the thrust ball bearing is equipped in the lower casing, and the screw rod is located in the thrust ball bearing.

[0013] The cover is equipped with operation panel, is used for on-the-spot control and display data.

[0014] The cover is provided with a wiring component for user wiring.

[0015] The manual component is arranged in the lower shell, and the gear of the manual component is engaged with the face gear on the gear.

[0016] The manual locking component is mounted on the upper cover plate and engaged with the manual shaft of the manual component.

[0017] The utility model discloses in working, the electric control assembly, motor and main transmission structure are integrated into a whole, thereby reduce the volume, reduce the weight, reduce the cost simultaneously.

[0018] When stroke testing, the absolute encoder tests the rotation number of the final screw rod and feeds back to the electric control assembly (namely the controller), realizes the closed loop control of stroke control and provides control precision. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in prior art, the drawings needed in the specific embodiment or prior art description will be briefly introduced as follows.The parts in the drawings are not necessarily drawn according to the actual proportion.

[0020] Figure 1 It is the structural schematic diagram of the utility model,

[0021] Figure 2 It is Figure 1 The left view of it is shown in the figure;

[0022] In the figure, 1 is a cover, 2 is a motor, 3 is an electric control assembly, 4 is an absolute encoder, 5 is a stroke component, 6 is a nut, 7 is an upper cover plate, 8 is a lower shell, 9 is a gear A, 10 is a gear B, 11 is a thrust ball bearing, 12 is a screw rod, 13 is a copper nut component, 14 is a guide sliding block, 15 is a support column, 16 is a connecting nut, 17 is a limit screw, 18 is an output flange, 19 is an operation panel, 20 is a manual component, 21 is a manual locking component, and 22 is a wiring component. DETAILED DESCRIPTION

[0023] The embodiments of the utility model will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout.The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0024] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as a limitation on the utility model, which does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0025] In the description of the utility model, it needs to be understood that the terms "mounting", "connection", "connection" should be understood in a broad sense unless otherwise specified and limited, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] The utility model provides a whole straight stroke electric device as shown in Figures 1-2 The cover 1 and the support 15 are assembled on the lower shell 8 to form the shell of the whole straight stroke electric device.

[0027] The motor 2, the absolute encoder 4, the electric control assembly 3 (i.e. the controller) and the stroke component 5 are installed on the upper cover plate 7 to form the power input and control unit of the straight stroke electric device.

[0028] The gear A 9, the gear B 10, the lead screw 12 and the copper nut component 13 are installed in the lower shell 8 to form the main transmission structure of the straight stroke electric device.

[0029] The motor 2 is connected with the gear A 9 through a key, the gear A 9 is engaged with the gear B 10, the gear B 10 is connected with the lead screw 12 through a spline, the lead screw 12 is matched with the copper nut component 13, the copper nut component 13 is fixed with the guide sliding block 14 through welding, the copper nut component 13 is connected with the connecting nut 16 through threads, and finally the connecting nut 16 is connected with the valve stem, so that the straight stroke electric device is connected with the valve. The up-down linear motion of the copper nut component 13 can be transmitted to the valve, so that the control of the valve opening is realized.

[0030] The guide sliding block 14 is matched with the support 15 to limit the rotary motion of the copper nut component, so that the rotary motion of the motor is converted into the up-down linear motion of the copper nut component.

[0031] The gear of the stroke component 5 meshes with the gear B10, transmitting the rotational motion of the lead screw 12 to the absolute encoder 4, thereby realizing stroke control of the linear electric device.

[0032] Since the final output of the stroke test is the number of rotations of the upper-level transmission component (i.e., the lead screw) of the copper nut component 13, closed-loop control of the linear motion stroke of the copper nut is realized, resulting in high control accuracy.

[0033] The nut 6 is installed at the top of the lead screw 12 and, together with the gear B10 and the thrust ball bearing 11, reliably houses the lead screw 12 in the lower housing 8, for transmitting the thrust borne by the linear electric device.

[0034] The preload of the nut 6 must ensure that the lead screw can rotate while also minimizing the vertical clearance between the lead screw 12 and the lower housing 8, thereby ensuring the high control accuracy of the linear electric device of the present invention.

[0035] The gear of the manual component 20 meshes with the face gear on the gear A9, thereby enabling manual operation.

[0036] The manual locking component 21 is installed on the upper cover plate 7 and engages with the manual shaft of the manual component 20. It is used to lock the electric component when it is manually operated, so that the electric and manual components do not interfere with each other, ensuring the independence and safety of manual and electric components.

[0037] The manual component and the manual locking component in this invention have been disclosed in application number 202310427222.0, entitled "A Manual Locking Mechanism for an Electric Actuator", and will not be described again here.

[0038] The operation panel 19 is mounted on the cover 1 for local control and data display of the electric device; the wiring component 22 is mounted on the cover 1 for user wiring.

[0039] In application, the support column 15 is equipped with a limiting screw 17, which serves as a limiting function.

[0040] The bottom of the pair of supports is equipped with an output flange 18 for easy installation.

[0041] Regarding the information disclosed in this case, the following points need to be clarified:

[0042] (1) The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design.

[0043] (2) Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments;

[0044] The above merely provides the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A whole straight stroke electric device, comprising an upper cover and a lower shell arranged in sequence, the bottom of the lower shell is provided with a pair of parallel supports; characterized in that Further comprising an upper cover plate, the upper cover plate is arranged on the top of the lower shell, and is used for separating the upper cover and the lower shell, The upper cover plate is provided with a motor, an absolute encoder and an electric control assembly inside the upper cover, The lower shell is provided with a gear A, a gear B, a lead screw and a copper nut component, The motor is connected with the gear A through a key, the gear A is engaged with the gear B, the gear B is connected with the lead screw through a spline, the lead screw is matched with the copper nut component, the copper nut component extends out of the bottom of the lower shell and is connected with a connecting nut through threads, the connecting nut is connected with a valve stem, The bottom of the copper nut component is provided with a guide sliding block at each end, and the guide sliding block is matched with the support; The gear B is engaged with the gear of a stroke component, and is used for transmitting the rotary motion of the lead screw to the absolute encoder.

2. The monobloc electric direct stroke device according to claim 1, characterized in that, Further comprising a nut, the nut is arranged above the gear B, and the nut is installed on the top end of the lead screw.

3. The monobloc electric direct stroke device according to claim 2, characterized in that, Further comprising a thrust ball bearing, the thrust ball bearing is arranged in the lower shell, and the lead screw is arranged in the thrust ball bearing.

4. The monobloc electric direct stroke device of claim 1, wherein, An operation panel is arranged on the upper cover, and is used for controlling and displaying data on site.

5. The monobloc electric direct stroke device of claim 1, wherein, A wiring component is arranged on the upper cover, and is used for user wiring.

6. The monobloc electric direct stroke device of claim 1, wherein, Further comprising a manual component, the manual component is arranged in the lower shell, and a gear of the manual component is engaged with a face gear on the gear.

7. A unit type linear motor electric device according to claim 6, wherein Further comprising a manual locking component, the manual locking component is installed on the upper cover plate and is engaged with a manual shaft of the manual component.

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