Electric push rod capable of feeding back push-out position through Hall

Abstract

The utility model relates to the technical field of electric push rods, in particular to an electric push rod capable of feeding back a push-out position through Hall, which comprises a shell, a motor arranged in the shell, a gear box and a push rod assembly, and an output shaft of the motor is in driving connection with the gear box to drive the push rod assembly to stretch out and draw back; the electric push rod further comprises a control panel, a magnetic induction piece and an electric contact piece, one end of the control panel is connected with the end, away from the output shaft of the motor, of the motor, and the magnetic induction piece is used for generating Hall induction with one end of the control panel. The electric contact piece is arranged on one side of the push rod assembly, the other end of the control panel abuts against the electric contact piece, and the other end of the electric contact piece and the other end of the control panel are electrically connected with the motor. The utility model aims to provide the electric push rod which feeds back the push-out position through the Hall, the push-out position of the push rod assembly is limited through Hall induction, the situation that the recognition accuracy is reduced due to aging of a traditional sensor is avoided, and the reliability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of electric push rods, in particular to an electric push rod that pushes out a position through Hall feedback. Background Art

[0002] An electric push rod, also called a linear actuator, mainly consists of a motor and a push rod assembly. A transmission assembly is connected between the motor and the push rod assembly. When working, the motor drives the push rod assembly to extend and retract through the transmission assembly, thereby driving the object to move.

[0003] Commonly used electric push rods limit the push-out position through contact sensors or infrared sensors, but this method will cause a decrease in recognition accuracy due to the aging of the sensor and has low reliability. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide an electric push rod that uses Hall feedback to push out the position, and to limit the push out position of the push rod assembly through Hall sensing, thereby avoiding the decrease in recognition accuracy due to aging of traditional sensors and having higher reliability.

[0005] The utility model is realized by the following technical solutions:

[0006] An electric push rod that pushes out a position through Hall feedback, comprising a housing, a motor mounted on the housing, a gear box and a push rod assembly, wherein the output shaft of the motor is drivingly connected to the gear box to drive the push rod assembly to extend and retract; the electric push rod also comprises a control board, a magnetic induction component and an electric contact, wherein one end of the control board is connected to an end of the motor away from its output shaft, and the magnetic induction component is used to generate Hall induction with one end of the control board; the electric contact is arranged on one side of the push rod assembly, and the other end of the control board contacts the electric contact, and the electric contact and the other end of the control board are both electrically connected to the motor.

[0007] Among them, the gearbox includes a gearbox housing, an input worm, an input worm wheel and a gear set. The input worm is drivingly connected to the output shaft of the motor. The input worm, input worm wheel and gear set are meshed in sequence. The gear at the end of the gear set is drivingly connected to the input end of the push rod assembly.

[0008] The push rod assembly includes a nut, a screw rod and a push rod coaxially connected to the screw rod for rotation. The screw rod is drivingly connected to the output end of the gear box, and the screw rod is threadedly connected to the nut.

[0009] Wherein, the electric contact is a metal spring sheet, and the metal spring sheet is pressed against the other end of the control board.

[0010] Wherein, the magnetic induction component is a cylindrical magnet.

[0011] Wherein, the control board is a flexible circuit board.

[0012] Beneficial effects of the utility model:

[0013] The utility model is an electric push rod that pushes out the position through Hall feedback. In actual use, the motor drives the output end of the push rod assembly to extend and retract through the gear box, and at the same time drives the electric contact to move relative to the other end of the control board. At this time, since the electric contact, the motor and the control board are connected, the magnetic induction component that rotates with the motor output shaft can generate Hall induction with the Hall element at one end of the control board, so that the motor can judge that the push rod assembly has not been extended to the farthest position and continue to work; when the push rod assembly is extended to the farthest position, the electric contact is set to be separated from the control board. At this time, the control board, the electric contact and the motor are powered off, and the Hall element on the control board cannot generate Hall induction with this induction component. The motor stops working after learning this information. Compared with the detection method of the prior art, the utility model realizes the limitation of the push rod assembly push position through Hall induction, avoids the reduction of recognition accuracy caused by the aging of traditional sensors, and has higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0017] Figure 3 It is an exploded view of the utility model.

[0018] Reference numerals

[0019] Housing--100, motor--101, control board--102, magnetic induction component--103,

[0020] Gearbox--200, gearbox housing--201, input worm--202, input worm wheel--203, gear set--204,

[0021] Push rod assembly--300, electric contact--301, nut--302, screw--303, push rod--304. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] An electric push rod, also called a linear actuator, mainly consists of a motor and a push rod assembly. A transmission assembly is connected between the motor and the push rod assembly. When working, the motor drives the push rod assembly to extend and retract through the transmission assembly, thereby driving the object to move.

[0026] Commonly used electric push rods limit the push-out position through contact sensors or infrared sensors, but this method will cause a decrease in recognition accuracy due to the aging of the sensor and has low reliability.

[0027] In order to solve the above problems, this embodiment discloses an electric push rod 304 that pushes out the position through Hall feedback. Figures 1 to 3As shown, the electric push rod 304 includes a housing 100, a motor 101 installed in the housing 100, a gear box 200 and a push rod 304 assembly 300, the output shaft of the motor 101 is drivingly connected to the gear box 200 to drive the push rod 304 assembly 300 to extend and retract; the electric push rod 304 also includes a control board 102, a magnetic induction component 103 and an electric contact 301, one end of the control board 102 is connected to an end of the motor 101 away from its output shaft, and the magnetic induction component 103 is used to generate Hall induction with one end of the control board 102; the electric contact 301 is arranged on one side of the push rod 304 assembly 300, the other end of the control board 102 is in contact with the electric contact 301, and the electric contact 301 and the other end of the control board 102 are both electrically connected to the motor 101.

[0028] Furthermore, a metal contact of a certain length is provided at the other end of the control board 102. In this embodiment, the electric contact 301 is preferably a metal spring sheet, and the metal spring sheet is pressed against the metal contact sheet to achieve electrical connection. In addition, the magnetic induction component 103 is a cylindrical magnet, which can ensure that the magnetic induction component 103 does not affect the stability of the motor 101 when rotating; the control board 102 is preferably a flexible circuit board, which can adapt to the electric push rod 304 of the housing 100 of different shapes.

[0029] Specifically, the utility model is an electric push rod 304 that pushes out the position through Hall feedback. During actual use, the motor 101 drives the output end of the push rod 304 component 300 to extend and retract through the gear box 200, and at the same time drives the electric contact 301 to move relative to the other end of the control board 102. At this time, since the electric contact 301, the motor 101 and the control board 102 are connected, the magnetic induction component 103 that rotates with the output shaft of the motor 101 can generate Hall induction with the Hall element at one end of the control board 102, so that the motor 101 can judge that the push rod 304 component 300 has not been extended to the farthest position and continue to work; when the push rod 304 component 300 is extended to the farthest position, the electric contact 301 is set to be separated from the control board 102. At this time, the control board 102, the electric contact 301 and the motor 101 are powered off, and the Hall element on the control board 102 cannot generate Hall induction with this induction component. After the motor 101 learns this information, it stops working. Compared with the detection method of the prior art, the utility model limits the push position of the push rod 304 component 300 through Hall induction, avoids the reduction of recognition accuracy due to aging of traditional sensors, and has higher reliability.

[0030] from Figure 3It can be seen that the gearbox 200 includes a gearbox housing 201, an input worm 202, an input worm wheel 203 and a gear set 204. The input worm 202 is drivingly connected to the output shaft of the motor 101. The input worm 202, the input worm wheel 203 and the gear set 204 are meshed in sequence. The gear at the end of the gear set 204 is drivingly connected to the input end of the push rod 304 assembly 300.

[0031] from Figure 3 It can be seen that the push rod 304 assembly 300 includes a nut 302 , a screw 303 , and a push rod 304 coaxially rotatably connected to the screw 303 . The screw 303 is drivingly connected to the output end of the gear box 200 , and the screw 303 is threadedly connected to the nut 302 .

[0032] Through the above structure, the motor 101 can achieve stable driving output to the push rod 304 assembly 300.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. An electric push rod that pushes out the position through Hall feedback, characterized in that: It comprises a housing, a motor installed in the housing, a gear box and a push rod assembly, wherein the output shaft of the motor is drivingly connected to the gear box to drive the push rod assembly to extend and retract; The electric push rod also includes a control board, a magnetic induction element and an electric contact element, one end of the control board is connected to an end of the motor away from its output shaft, and the magnetic induction element is used to generate Hall induction with one end of the control board; The electric contact is arranged on one side of the push rod assembly, the other end of the control board contacts the electric contact, and the electric contact and the other end of the control board are both electrically connected to the motor.

2. The electric push rod for pushing out position by Hall feedback according to claim 1, characterized in that: The gearbox includes a gearbox housing, an input worm, an input worm wheel and a gear set. The input worm is drivingly connected to the output shaft of the motor. The input worm, the input worm wheel and the gear set are meshed in sequence. The gear at the end of the gear set is drivingly connected to the input end of the push rod assembly.

3. The electric push rod for pushing out position by Hall feedback according to claim 1, characterized in that: The push rod assembly comprises a nut, a screw rod and a push rod coaxially connected to the screw rod for rotation. The screw rod is drivingly connected to the output end of the gear box, and the screw rod is threadedly connected to the nut.

4. The electric push rod for pushing out position by Hall feedback according to claim 1, characterized in that: The electric contact is a metal spring sheet, and the metal spring sheet is pressed against the other end of the control board.

5. The electric push rod for pushing out position through Hall feedback according to claim 1, characterized in that: The magnetic induction component is a cylindrical magnet.

6. The electric push rod for pushing out position through Hall feedback according to claim 1, characterized in that: The control board is a flexible circuit board.

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