Electric actuator

Abstract

The utility model relates to the technical field of electric actuators, in particular to an electric actuator which comprises a power mechanism, an output device and a speed reduction transmission mechanism which is connected between the power mechanism and the output mechanism and used for transmitting driving force generated by the power mechanism to the output device. The control device is electrically connected to the power mechanism and used for controlling the power mechanism, a connecting hole is formed in the end, opposite to the output gear, of an output shaft of the output device in the axis direction of the output shaft, and the protective sleeve is arranged at the upper end of the output shaft in a sleeving mode and protrudes out of the upper end of the hole wall of the connecting hole. The inner wall of the protective sleeve and the upper end of the hole wall of the connecting hole form a stepped structure; by additionally arranging the protective sleeve, a step structure is formed at the upper end of the hole wall of the connecting hole, so that load connection is not affected, and the connecting hole is not damaged due to accidental touch; the utility model solves the technical problems that the connection hole of the electric actuator for connecting the load lacks protection, and the connection of the load is influenced after the connection hole is damaged and fails.

Description

Technical Field

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

[0002] The working principle of electric actuators is mainly based on the principle of electromagnetism. Its core components usually include motors, transmission mechanisms and control units. When current passes through the motor in the electric actuator, a magnetic field is generated inside the motor according to the law of electromagnetic induction. This magnetic field interacts with the permanent magnets or electromagnets inside the motor to generate a rotational force, causing the motor to start rotating. The rotation of the motor is further converted into the required linear displacement or rotational motion through transmission mechanisms such as gears and worms. In this process, the transmission mechanism can reduce speed and increase torque to meet specific motion requirements. The control unit is responsible for receiving external instructions or signals, and adjusting the magnitude and direction of the current according to these instructions, thereby accurately controlling the speed, direction and stop position of the motor. This enables electric actuators to achieve high-precision position control, speed control and force control.

[0003] For example, the invention patent application with authorization announcement number CN109751412A discloses an electric actuator, which includes a power mechanism for generating driving force, an output device, a reduction transmission mechanism connected between the power mechanism and the output mechanism for transmitting the driving force generated by the power mechanism to the output device, and a control device electrically connected to the power mechanism for controlling the power mechanism. The entire actuator has a compact structure and high space utilization.

[0004] In the above-mentioned electric actuator, a connecting hole is provided along the axial direction of the output shaft at the end of the output shaft of the output device that is away from the output gear. The connecting hole is used to connect the load and then drive the load to move. However, the connecting hole is exposed and lacks protection. The connecting hole may be accidentally touched during the installation process. Once the hole wall of the connecting hole is damaged and fails, it will directly affect the stability of the connected load and affect the use of the entire actuator. Utility Model Content

[0005] The utility model provides an electric actuator to solve the technical problem in the prior art that a connection hole of the electric actuator for connecting a load lacks protection and affects the connection of the load after being damaged and failed.

[0006] In order to solve the above problems, the electric actuator provided by the utility model adopts the following technical solutions:

[0007] An electric actuator comprises a power mechanism, an output device, a reduction transmission mechanism connected between the power mechanism and the output mechanism for transmitting the driving force generated by the power mechanism to the output device, and also comprises a control device electrically connected to the power mechanism for controlling the power mechanism, an output shaft of the output device is provided with a connection hole along the axial direction of the output shaft at one end facing away from the output gear, the connection hole is used to connect a load to drive the load to move, and also comprises:

[0008] A protective sleeve is sleeved on the upper end of the output shaft and protrudes from the upper end of the hole wall of the connecting hole. The inner wall of the protective sleeve and the upper end of the hole wall of the connecting hole form a stepped structure to protect the connecting hole.

[0009] Furthermore, the electric actuator comprises two opposed shells, the interior of the shells forms a space for accommodating a power mechanism, an output device, a reduction transmission mechanism and a control device, and the protective sleeve is a shell structure and is integrally formed with the corresponding shell.

[0010] Furthermore, the outer peripheral surface of the protective sleeve has a groove at a position corresponding to the upper end of the hole wall of the connecting hole, and a structural reinforcement member is embedded in the groove.

[0011] Furthermore, the structural reinforcement member is a metal member.

[0012] Furthermore, the groove is an annular groove, the metal part is a metal ring, and the outer diameter of the metal ring is adapted to the groove wall width of the annular groove.

[0013] Furthermore, a weight-reducing slot is provided on the upper hole wall of the protective sleeve.

[0014] Furthermore, the weight-reducing slots are arc-shaped long holes, and there are multiple of them, and the multiple weight-reducing slots are evenly spaced in the circumferential direction of the upper end surface of the protective sleeve.

[0015] Furthermore, the shell is provided with a connecting ear plate in the circumference thereof, and a metal lining plate is provided on the inner side of the connecting ear plate.

[0016] The beneficial effects of the electric actuator provided by the utility model are:

[0017] 1) By adding a protective sleeve, a stepped structure is formed at the upper end of the hole wall of the connection hole, which neither affects the connection of the load nor damages the connection hole due to accidental contact, thereby ensuring the integrity of the connection hole. The load can be stably connected, thereby stably exerting the actuation function;

[0018] 2) The groove and the metal ring are used to effectively ensure the structural strength of the outer surface of the protective sleeve at the position of the upper end of the hole wall corresponding to the connecting hole, thereby improving the service life of the protective sleeve;

[0019] 3) The weight-reducing slots reduce the weight of the entire device, making the entire actuator easier to access.

[0020] Through the above arrangement, the utility model completes the improvement and upgrade of the existing electric actuator, and effectively solves the technical problem in the prior art that the connection hole of the electric actuator for connecting the load lacks protection and affects the connection of the load after being damaged and failed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0022] Figure 1 A three-dimensional schematic diagram of the electric actuator provided by the utility model Figure 1 ;

[0023] Figure 2 A three-dimensional schematic diagram of the electric actuator provided by the utility model Figure 2 ;

[0024] Figure 3 A three-dimensional schematic diagram of the electric actuator provided by the utility model Figure 3 .

[0025] Description of reference numerals:

[0026] 1. Power mechanism; 2. Output device; 3. Protective sleeve; 4. Connecting hole; 5. Housing; 6. Annular groove; 7. Metal ring; 8. Weight reduction slot; 9. Connecting ear plate; 10. Metal lining plate; 11. Reduction transmission mechanism. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] It should be noted that the main idea of ​​the present invention is to add a protective sleeve 3 to the connecting hole 4 for connecting the load, which neither affects the connection of the load nor causes damage to the connecting hole 4 due to accidental touching, thereby ensuring the integrity of the connecting hole 4, and the load can be stably connected, thereby stably performing the actuation function; so as to solve the technical problem in the prior art that the connecting hole 4 of the electric actuator for connecting the load lacks protection, and the connection of the load is affected after being damaged and failed.

[0029] After introducing the basic principle of the utility model, various non-limiting embodiments of the utility model are specifically introduced below. Any number of elements in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0030] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0031] Embodiment 1 of the electric actuator provided by the utility model:

[0032] like Figures 1 to 3 As shown, the electric actuator includes a power mechanism 1, an output device 2, a reduction transmission mechanism 11 connected between the power mechanism 1 and the output mechanism for transmitting the driving force generated by the power mechanism 1 to the output device 2, and also includes a control device electrically connected to the power mechanism 1 for controlling the power mechanism 1. The end of the output shaft of the output device 2 facing away from the output gear is provided with a connecting hole 4 along the axial direction of the output shaft, and the connecting hole 4 is used to connect a load to drive the load to move.

[0033] It should be noted that the working principles of the above-mentioned power mechanism 1, output device 2, speed reduction transmission mechanism 11 connected to the power mechanism 1 and control device can refer to the contents disclosed in the patent documents in the background technology. Since it belongs to the prior art, it will not be repeated here.

[0034] On the basis of the above structure, the utility model also includes a protective sleeve 3, which is sleeved on the upper end of the output shaft and protrudes from the upper end of the hole wall of the connecting hole 4. The inner wall of the protective sleeve 3 and the upper end of the hole wall of the connecting hole 4 form a stepped structure to protect the connecting hole 4.

[0035] Specifically, the electric actuator includes two opposed shells 5 , the interior of the shells 5 forms a space for accommodating the power mechanism 1 , the output device 2 , the reduction transmission mechanism 11 and the control device, and the protective sleeve 3 is a shell structure and is integrally formed with the corresponding shell 5 .

[0036] In order to increase the strength, the outer peripheral surface of the protective sleeve 3 has a groove at a position corresponding to the upper end of the hole wall of the connecting hole 4, and a structural reinforcement is embedded in the groove. The structural reinforcement is a metal part.

[0037] Specifically, the groove is an annular groove 6, the metal piece is a metal ring 7, and the outer diameter of the metal ring 7 is adapted to the groove wall width of the annular groove 6. A weight-reducing slot 8 is provided on the upper hole wall of the protective sleeve 3.

[0038] The weight-reducing slots 8 are arc-shaped long holes, and there are multiple of them. The multiple weight-reducing slots 8 are evenly spaced in the circumferential direction of the upper end surface of the protective sleeve 3 .

[0039] In addition, the housing 5 has a connection lug plate 9 on its circumference, and a metal lining plate 10 is provided on the inner side of the connection lug plate 9 .

[0040] The working principle of the electric actuator provided by the utility model is as follows: by adding a protective sleeve 3, a stepped structure is formed at the upper end of the hole wall of the connecting hole 4, which neither affects the connection of the load nor causes damage to the connecting hole 4 due to accidental touching, thereby ensuring the integrity of the connecting hole 4, and the load can be stably connected, thereby stably exerting the actuation function; by using the groove and the metal ring 7 to cooperate, the structural strength of the outer peripheral surface of the protective sleeve 3 at the position corresponding to the upper end of the hole wall of the connecting hole 4 is effectively guaranteed, thereby improving the service life of the protective sleeve 3.

[0041] Embodiment 2 of the electric actuator provided by the utility model:

[0042] The main difference between it and Example 1 is:

[0043] In Example 1, the weight-reducing slots are arc-shaped long holes, and there are multiple of them, and the multiple weight-reducing slots are evenly spaced in the circumferential direction of the upper end surface of the protective sleeve.

[0044] In this embodiment, the weight-reducing slot hole may also be a round hole or a special-shaped hole.

[0045] Embodiment 3 of the electric actuator provided by the utility model:

[0046] The main difference between it and Example 1 is:

[0047] In Example 1, the groove is an annular groove, the metal part is a metal ring, and the outer diameter of the metal ring is adapted to the groove wall width of the annular groove.

[0048] In this embodiment, the groove is a plurality of arc-shaped grooves arranged at intervals, and a metal block is arranged in each arc-shaped groove as a reinforcement structure.

[0049] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0050] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. An electric actuator, comprising a power mechanism, an output device, a reduction transmission mechanism connected between the power mechanism and the output mechanism for transmitting the driving force generated by the power mechanism to the output device, and also comprising a control device electrically connected to the power mechanism for controlling the power mechanism, an output shaft of the output device having an end facing away from the output gear and provided with a connecting hole along the axial direction of the output shaft, the connecting hole being used to connect a load to drive the load to move, characterized in that: Also includes: A protective sleeve is sleeved on the upper end of the output shaft and protrudes from the upper end of the hole wall of the connecting hole. The inner wall of the protective sleeve and the upper end of the hole wall of the connecting hole form a stepped structure to protect the connecting hole.

2. The electric actuator according to claim 1, characterized in that: The electric actuator comprises two opposed shells, wherein a space for placing a power mechanism, an output device, a reduction transmission mechanism and a control device is formed inside the shells, and the protective sleeve is a shell structure and is integrally formed with the corresponding shells.

3. The electric actuator according to claim 2, characterized in that: The outer peripheral surface of the protective sleeve is provided with a groove at a position corresponding to the upper end of the hole wall of the connecting hole, and a structural reinforcement member is embedded in the groove.

4. The electric actuator according to claim 3, characterized in that: The structural reinforcement member is a metal member.

5. The electric actuator according to claim 4, characterized in that: The groove is an annular groove, the metal piece is a metal ring, and the outer diameter of the metal ring is adapted to the groove wall width of the annular groove.

6. The electric actuator according to any one of claims 1 to 5, characterized in that: The upper end hole wall of the protection sleeve is provided with a weight-reducing slot hole.

7. The electric actuator according to claim 6, characterized in that: The weight-reducing slots are arc-shaped long holes, and there are a plurality of them, and the plurality of weight-reducing slots are evenly spaced in the circumferential direction of the upper end surface of the protective sleeve.

8. The electric actuator according to any one of claims 2 to 5, characterized in that: The shell body is provided with a connecting ear plate in the circumference thereof, and a metal lining plate is provided on the inner side of the connecting ear plate.

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