A bearing seat for a brushless electric trolley

Abstract

This utility model relates to the field of driver technology, and in particular to a bearing housing for a brushless electric linear actuator. This utility model utilizes the axial space of the housing to form a first mounting cavity, a second mounting cavity, and a third mounting cavity to facilitate the assembly of the drive motor and shorten the axial length of the drive portion of the linear actuator formed after the drive motor is assembled, which is beneficial for the miniaturization of the drive portion of the electric linear actuator. The third mounting cavity is used to accommodate the braking component of the motor shaft, and the braking component is fixed by rivet-like components in the positioning cavity, so that the braking component is located between the motor rotor and the bearing. This fully utilizes the internal space of the motor and realizes the internal integration of the braking component, overcoming the problems of increased size and complex structure of the drive portion of the electric linear actuator caused by mounting the braking component outside the motor in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of driver technology, and in particular to a bearing housing for a brushless electric actuator. Background Technology

[0002] An electric linear actuator is a mechanism that uses a power structure to drive a linear actuator to perform linear motion. It typically integrates a motor and a transmission mechanism. The rotational motion of the motor can be converted into the linear motion of the linear actuator. As an electric actuator, the electric linear actuator has advantages such as high precision, high reliability, low maintenance cost, strong environmental adaptability, and easy installation. It has broad application prospects in fields such as intelligent furniture, industrial automation, and medical equipment.

[0003] Existing electric linear actuators mainly use permanent magnet DC carbon brush motors. Carbon brush motors are extremely prone to wear during use. After the carbon brush motor wears out, not only do the carbon brushes need to be replaced, but also the rotating gears and other accessories around the motor need to be replaced. Moreover, the wear of the carbon brush motor will affect the use of the electric linear actuator. In addition, the electric motors used in existing electric linear actuators vary greatly in size, requiring different specifications of housings to accommodate various motor models, resulting in high manufacturing costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model improves the bearing housing structure, thereby enabling the motor braking component of the electric push rod to be built-in, making full use of the internal space of the motor, and overcoming the problems of increased product size and complex structure caused by external braking components in existing technologies.

[0005] The technical solution of this utility model is as follows: A bearing housing for a brushless electric actuator includes a housing body. One end face of the housing body has a concave circular first mounting cavity. Mounting end faces are formed on the housing body around the first mounting cavity. The bottom of the first mounting cavity has a further concave circular second mounting cavity. The bottom of the second mounting cavity has a through hole. A circular third mounting cavity is provided between the first and second mounting cavities. The housing body also has a positioning cavity. The positioning cavity and the third mounting cavity are in the same plane and are connected.

[0006] Furthermore, the base is square, and there are protruding arc-shaped reinforcing parts at the four corners of the base, with the end face of the arc-shaped reinforcing parts extending outward beyond the mounting end face.

[0007] Furthermore, the mounting end face is provided with a connecting through hole near the arc-shaped reinforcing part.

[0008] Furthermore, the first mounting cavity is provided with a guide slope along the edge of the third mounting cavity.

[0009] Furthermore, the base body has three mounting posts on the back of the first mounting cavity along the outer edges of the second and third mounting cavities, and the mounting posts have mounting connection holes along the axial direction.

[0010] Furthermore, four tensioning protrusions are evenly distributed on the inner wall of the second mounting cavity.

[0011] In summary, this utility model has the following beneficial effects: This invention improves the bearing housing structure, enabling the motor braking component of the electric push rod to be built-in, thus making full use of the internal space of the motor and overcoming the problems of increased product size and complex structure caused by the external placement of the braking component in the prior art. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional schematic diagram from another perspective of the present invention; Figure 3 This is a cross-sectional view of the present invention; In the diagram, 1 represents the base. 10 is the first mounting cavity, 11 is the mounting end face, 12 is the second mounting cavity, 120 is the through hole, 13 is the third mounting cavity, 14 is the positioning cavity, 15 is the arc reinforcement part, 110 is the connecting through hole, 100 is the guide slope, 16 is the mounting post, 160 is the mounting connection hole, and 121 is the tensioning protrusion. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0014] It should be noted that when a component is referred to as being "set on" or "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "fixed to" another component, or "fixedly connected" to another component, the fixing method can be detachable or non-detachable. When a component is considered to be "connected" or "rotatably connected" to another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used are for illustrative purposes only and do not represent the only possible implementation.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0016] In this invention, terms such as "first," "second," and "third" are used not to represent specific quantities or orders, but merely to distinguish names.

[0017] See Figures 1 to 3 As shown, a bearing housing for a brushless electric actuator includes a housing 1. One end face of the housing 1 has a concave circular first mounting cavity 10. Mounting end faces 11 are formed on the housing 1 around the first mounting cavity 10. The bottom of the first mounting cavity 10 has a further concave circular second mounting cavity 12. The second mounting cavity is used for mounting a bearing, which supports one end of the motor shaft. The bottom of the second mounting cavity 12 has a through hole 120. A circular third mounting cavity 13 is provided between the first mounting cavity 10 and the second mounting cavity 12. The housing 1 also has a positioning cavity 14. The positioning cavity 14 and the third mounting cavity 13 are in the same plane and are connected.

[0018] This invention designs a bearing housing for a brushless electric linear actuator. The axial space of the housing is used to form a first mounting cavity, a second mounting cavity, and a third mounting cavity to facilitate the assembly of the drive motor. This also shortens the axial length of the drive section of the linear actuator after the drive motor is assembled, which is beneficial for miniaturizing the drive section of the electric linear actuator. The third mounting cavity is used to accommodate the braking component of the motor shaft, and the braking component is fixed by rivet-like components in the positioning cavity. This allows the braking component to be located between the motor rotor and the bearing, making full use of the internal space of the motor and achieving the internal integration of the braking component. This overcomes the problems of increased size and complex structure of the drive section of the electric linear actuator caused by mounting the braking component outside the motor in the prior art.

[0019] In this embodiment, the base 1 is square, and the four corners of the base 1 are provided with outwardly protruding arc-shaped reinforcing parts 15. The end face of the arc-shaped reinforcing parts 15 extends and protrudes beyond the mounting end face 11. The arc-shaped reinforcing parts are used to reinforce the corners of the base, and the part protruding beyond the mounting end face is used to fit tightly against the outer wall of the motor stator, thereby forming a circumferential positioning of the motor stator and ensuring the coaxiality of the motor stator and the second mounting cavity.

[0020] Furthermore, the mounting end face 11 is provided with a connecting through hole 110 near the arc reinforcement part. The connecting through hole allows the connecting bolt to pass through, thereby fixing the bearing seat, motor stator and electric push rod housing, and facilitating the assembly of the electric push rod.

[0021] The first mounting cavity 10 is provided with a guide slope 100 along the edge of the third mounting cavity 13. The third mounting cavity is used to accommodate the motor shaft braking component. The guide slope plays a guiding role, so that the motor shaft braking component can enter the third mounting cavity quickly and accurately, thereby improving the speed and accuracy of installation.

[0022] Furthermore, the base 1 has three mounting posts 15 on the back of the first mounting cavity 10 along the outer edges of the second and third mounting cavities. The mounting posts 15 have mounting connection holes along the axial direction. The mounting posts are located on the side away from the mounting end face. The mounting posts are used to install and fix the motor control board of the electric push rod, making full use of both ends of the base to fix more components and improve the compactness of the structure.

[0023] Four tensioning protrusions 121 are evenly distributed on the inner wall of the second mounting cavity 12. The tensioning protrusions are interference-fitted with the outer ring of the bearing to ensure the reliability of the bearing's fixation in the second mounting cavity and prevent it from falling off. Since the braking component is located between the bearing and the motor rotor, the bearing falling off will not squeeze the braking component, which helps to improve the reliability of the equipment.

[0024] In summary, this utility model has the following beneficial effects: This invention improves the bearing housing structure, enabling the motor braking component of the electric push rod to be built-in, thus making full use of the internal space of the motor and overcoming the problems of increased product size and complex structure caused by the external placement of the braking component in the prior art.

[0025] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A bearing housing for a brushless electric linear actuator, comprising a housing body, characterized in that: One end face of the base is provided with a concave circular first mounting cavity. Mounting end faces are formed on the base around the first mounting cavity. The bottom of the first mounting cavity is provided with a further concave circular second mounting cavity. The bottom of the second mounting cavity is provided with a through hole. A circular third mounting cavity is provided between the first and second mounting cavities. The base is also provided with a positioning cavity. The positioning cavity and the third mounting cavity are in the same plane and are connected.

2. The bearing housing of a brushless electric linear actuator according to claim 1, characterized in that: The base is square, and there are protruding arc-shaped reinforcing parts at the four corners of the base. The end face of the arc-shaped reinforcing part extends outward beyond the mounting end face.

3. The bearing housing of a brushless electric linear actuator according to claim 2, characterized in that: The mounting end face is provided with a connecting through hole near the arc-shaped reinforcement.

4. The bearing housing of a brushless electric linear actuator according to claim 1, characterized in that: The first mounting cavity is provided with a guide slope along the edge of the third mounting cavity.

5. The bearing housing of a brushless electric linear actuator according to claim 1, characterized in that: The base body has three mounting posts on the back of the first mounting cavity along the outer edges of the second and third mounting cavities, and the mounting posts have mounting connection holes along the axial direction.

6. The bearing housing of a brushless electric linear actuator according to claim 1, characterized in that: The inner wall of the second mounting cavity is provided with four tensioning protrusions.

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