A servo motor for an eccentric device

Abstract

This utility model relates to a servo motor for eccentric devices, belonging to the field of servo motor technology, to solve the problem that existing servo motors, when applied to eccentric devices and subjected to cyclic impact loads, suffer premature damage to motor components due to load, resulting in bearing damage, shaft cracking, and housing damage. This application includes a housing and a shaft assembly. The housing has a shaft hole, and the shaft assembly includes a shaft rotatably mounted inside the housing via a bearing, with at least one end of the shaft extending outside the shaft hole to form a power output shaft. A first reinforcement component is installed at a position corresponding to the bearing on the housing, and a bearing hole is provided at a corresponding position on the housing. A second reinforcement component is provided between the housing and the bearing hole. This application uses the first reinforcement component to fix and support the bearing. By providing the second reinforcement component between the housing and the bearing hole, the bearing and motor housing have high load-bearing capacity under cyclic impact loads, thereby extending the service life of the components.

Description

Technical Field

[0001] This utility model relates to a servo motor for an eccentric device, belonging to the field of servo motor technology. Background Technology

[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system; it is a type of auxiliary motor with indirect speed control. Servo motors can control speed and position with very high accuracy, converting voltage signals into torque and speed to drive the controlled object. The rotor speed of a servo motor is controlled by the input signal and can respond quickly. In automatic control systems, it is used as an actuator and has characteristics such as a small electromechanical time constant and high linearity. It can convert received electrical signals into angular displacement or angular velocity output on the motor shaft.

[0003] Existing servo motors are suitable for equipment with eccentric mechanisms. When driving such equipment, servo motors must withstand cyclic impact loads from eccentric components, such as eccentric wheels. This is especially true when used in heavy-duty eccentric equipment, where the load is a severe impact load. Due to the small size and light weight of existing servo motors, premature shaft failure, bearing damage, shaft cracking, and servo motor housing damage can occur when subjected to heavy impact loads. Therefore, a new servo motor specifically designed for eccentric mechanisms is needed to address the problem of premature damage to servo motor components, such as bearing failure, shaft cracking, and housing damage, caused by cyclic impact loads when existing servo motors are used in eccentric equipment. Utility Model Content

[0004] The purpose of this invention is to provide a servo motor for an eccentric device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a servo motor for an eccentric device, comprising a housing and a shaft assembly, wherein the housing is provided with a shaft hole, the shaft assembly includes a shaft, the shaft is rotatably mounted inside the housing via a bearing, and at least one end of the shaft extends to the outside of the shaft hole to form the power output shaft of the servo motor; a first reinforcement is installed at a position corresponding to the bearing on the housing, and a bearing hole is provided at a position corresponding to the bearing on the housing, and a second reinforcement is provided between the housing and the bearing hole.

[0006] Specifically, the housing includes a main housing, a front cover, and a rear cover; the main housing is a hollow housing structure with openings on both sides; the front cover and the rear cover are fixedly installed on the two opening sides of the main housing, and the front cover and the rear cover are respectively provided with bearing holes, and bearings are installed on the rotating shaft at positions corresponding to the bearing holes of the front cover and the rear cover, and are rotatably installed on the housing.

[0007] Specifically, the front cover and the rear cover are respectively provided with a pivot hole, and the pivot shaft located on the side of the front cover extends to the outside of the pivot hole of the front cover to form a power output shaft.

[0008] Specifically, the shaft has a stepped structure in terms of shaft diameter, with the shaft diameter on the power output shaft side being larger than that on the rear end cover side.

[0009] Specifically, a rotor core is fixedly installed on an intermediate shaft located between the power output shaft and the shaft located on the rear end cover side. The shaft diameter of the intermediate shaft is smaller than that of the shaft on the power output shaft side but larger than that of the shaft on the rear end cover side.

[0010] Specifically, the first reinforcement component includes a first bearing plate and a second bearing plate. A first bearing hole is formed on the cover body facing the main housing, and a first bearing is installed inside. A first bearing plate is installed on the shaft of the first bearing away from the front cover. The first bearing plate has several threaded holes spaced around the shaft. Mounting holes are formed on the front cover at positions corresponding to the threaded holes. The first bearing plate is fixedly connected to the front cover by connecting bolts that pass through the mounting holes and are threadedly connected to the threaded holes. A second bearing hole is formed on the cover body facing the main housing, and a second bearing is installed inside. A mounting groove is formed on the cover body of the rear cover away from the second bearing hole. Several mounting threaded holes are spaced around the shaft in the mounting groove. A connecting hole is formed on the second bearing plate at positions corresponding to the mounting threaded holes. The second bearing plate is fixedly connected to the rear cover by mounting bolts that pass through the connecting holes and are threadedly connected to the mounting threaded holes.

[0011] Specifically, the bearings installed on both the front and rear covers are enlarged load-bearing bearings.

[0012] Specifically, both the front and rear caps are thickened end caps.

[0013] Specifically, the second reinforcement component is a reinforcing rib; eight reinforcing ribs are evenly distributed around the pivot along the outer circumference of the bearing hole on the front end cover, and four reinforcing ribs are evenly distributed around the pivot along the outer circumference of the bearing hole on the rear end cover; all reinforcing ribs are of increased thickness.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The servo motor for the eccentric device of this application has a shaft hole on its housing, and the shaft is rotatably mounted inside the housing via a bearing, with at least one end of the shaft extending to the outside of the shaft hole to form the power output shaft of the servo motor. A first reinforcement is installed at a position corresponding to the bearing on the housing, and a bearing hole is provided at a position corresponding to the bearing on the housing. A second reinforcement is provided between the housing and the bearing hole. This allows the bearing to be fixedly supported by the first reinforcement, thereby improving the bearing's load-bearing capacity. By providing the second reinforcement between the housing and the bearing hole, the load-bearing capacity of the housing is improved, resulting in high load-bearing capacity for both the bearing and the motor housing when the servo motor is subjected to cyclic impact loads, thus extending the service life of the components.

[0015] 2. Based on the foregoing, the shaft of this application has a stepped shaft diameter structure, with the shaft diameter on the power output shaft side being larger than that on the rear end cover side. This is to improve the shaft's load-bearing capacity by setting the shaft on the load-bearing side (power output shaft side) to a larger diameter structure, thereby enhancing the shaft's ability to withstand impact loads and extending its service life.

[0016] 3. Based on the foregoing, the first reinforcement component of this application is a bearing clamping plate. By installing the bearing clamping plate at the bearing position of the front and rear covers, it not only serves to fix the inner and outer rings of the bearing to prevent axial movement and bearing damage when the bearing is subjected to impact loads, but also transfers the impact load on the bearing to the housing, further reducing the impact load on the bearing and protecting its normal operation.

[0017] 4. Based on the foregoing, in order to further improve the impact load bearing capacity of the motor housing, this application adopts thickened end caps for both the front and rear covers to increase the housing's load-bearing capacity. Similarly, in order to further improve the impact load bearing capacity of the motor bearings, the bearings installed on the front and rear covers are enlarged load-bearing bearings to increase the bearing's load-bearing capacity.

[0018] 5. Based on the foregoing, the second reinforcement in this application is a set of reinforcing ribs. Eight reinforcing ribs are evenly distributed around the bearing hole circumference of the front cover at intervals along the shaft, and four reinforcing ribs are evenly distributed around the bearing hole circumference of the rear cover at intervals along the shaft. All reinforcing ribs are of increased thickness. This is to improve the overall load-bearing capacity of the front and rear covers located on the bearing hole side. Considering that the front cover side is the power output shaft side, which is the main load-bearing part for impact loads, by setting the number of reinforcing ribs on the front cover to eight, the load-bearing capacity of the end cover side is uniformly improved in the circumferential direction around the bearing hole. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the servo motor used in the eccentric device of this embodiment; Figure 2 This is an exploded view (1) of the structure of the servo motor for the eccentric device in this embodiment; Figure 3 The exploded view (2) shows the structure of the servo motor for the eccentric device in this embodiment.

[0020] In the figure: 1. Housing; 2. Shaft assembly; 3. Main housing; 4. Front end cover; 5. Rear end cover; 6. Shaft; 7. Rotor core; 8. First reinforcement component; 9. Second reinforcement component; 10. First bearing; 11. Second bearing; 80. First bearing pressure plate; 81. Second bearing pressure plate. Detailed Implementation

[0021] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0022] Please see Figures 1-3 This embodiment discloses a servo motor for an eccentric device, including a housing 1 and a shaft assembly 2. The housing 1 includes a main housing 3, a front cover 4, and a rear cover 5. The shaft assembly includes a shaft 6. The main housing is a hollow structure with openings on both sides. The front cover and rear cover are fixedly installed on the opening sides of the main housing, and each has a bearing hole. Bearings are mounted on the shaft at positions corresponding to the bearing holes of the front and rear covers, and the shaft is rotatably mounted on the housing. The bearings mounted on the front and rear covers are enlarged load-bearing bearings, and both the front and rear covers are thickened end caps. The front and rear covers each have a shaft hole, and the shaft on the front cover side extends to the outside of the shaft hole on the front cover to form a power output shaft. A first reinforcement 8 is installed on the housing at a position corresponding to the bearing, and a bearing hole is provided at the corresponding position of the housing and the bearing. A second reinforcement 9 is provided between the housing and the bearing hole.

[0023] In this embodiment, the shaft has a stepped shaft diameter, with the shaft diameter on the power output shaft side being larger than that on the rear end cover side.

[0024] Furthermore, in this embodiment, a rotor core 7 is fixedly installed on an intermediate shaft located between the power output shaft and the shaft located on the rear end cover side, and the shaft diameter of the intermediate shaft is smaller than the shaft diameter of the shaft on the power output shaft side but larger than the shaft diameter of the shaft on the rear end cover side.

[0025] The first reinforcement component in this embodiment includes a first bearing plate 80 and a second bearing plate 81. A first bearing hole is provided on the cover body facing the main housing side of the front end cover, and a first bearing 10 is installed inside. A first bearing plate is installed on the shaft of the first bearing away from the front end cover. A plurality of threaded holes are provided on the first bearing plate around the shaft at intervals. An installation hole is provided on the front end cover at a position corresponding to the threaded hole. The first bearing plate is fixedly connected to the front end cover by connecting bolts passing through the installation hole and threadedly connecting to the threaded hole. A second bearing hole is provided on the cover body facing the main housing side of the rear end cover, and a second bearing 11 is installed inside. An installation groove is provided on the cover body away from the second bearing hole of the rear end cover. A plurality of installation threaded holes are provided on the installation groove around the shaft at intervals. A connecting hole is provided on the second bearing plate at a position corresponding to the installation threaded hole. The second bearing plate is fixedly connected to the rear end cover by installing bolts passing through the connecting hole and threadedly connecting to the installation threaded hole.

[0026] Furthermore, in this embodiment, the second reinforcement component is a reinforcing rib; eight reinforcing ribs are evenly distributed around the pivot along the outer circumference of the bearing hole on the front end cover, and four reinforcing ribs are evenly distributed around the pivot along the outer circumference of the bearing hole on the rear end cover; all reinforcing ribs are of increased thickness type.

[0027] Working Principle: In this embodiment, the servo motor of the eccentric device is connected to the eccentric device via a coupling to drive the equipment with the eccentric device. During equipment operation, the eccentric components of the eccentric device, such as the eccentric wheel, generate periodic impact loads. The servo motor shaft is first affected by the impact load via the power output shaft. Under the action of the impact load, the first bearing on the front cover side and the second bearing on the rear cover side will experience radial and / or axial impact forces, resulting in a tendency to displacement. This displacement tendency includes the inner and outer rings of the bearings themselves and the rolling elements. To reduce the impact load on the first bearing, the shaft, and the motor housing, bearing pressure plates are installed on the front and rear covers where the first and second bearings are located to fix the inner and outer rings of the bearings and prevent the bearings from displacing under impact loads. Furthermore, due to the presence of the bearing pressure plates, when the bearings are subjected to impact, the impact load is transferred to the servo motor housing through the bearing pressure plates, thus protecting the bearings from damage. To further improve the load-bearing capacity of the first bearing, second bearing, and housing in this embodiment, both the first and second bearings are enlarged load-bearing bearings, and both the front and rear covers are thickened end covers. Considering that the load-bearing capacity of the front and rear covers at the bearing hole positions is insufficient due to the empty space in the bearing holes, this embodiment uses reinforcing ribs as second reinforcements at the bearing holes of the front and rear covers to improve the load-bearing capacity of the housing. In particular, the front cover is located on the power output shaft side, which experiences a greater impact load; therefore, the number of reinforcing ribs on the front cover side is set to eight, and all reinforcing ribs are enlarged structures. Similarly, the shaft in this embodiment has a stepped shaft diameter structure, with the shaft diameter on the power output shaft side being larger than that on the rear cover side; that is, the shaft on the power output shaft side is designed with an enlarged shaft diameter to improve the overall load-bearing capacity of the shaft.

[0028] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. For those skilled in the art, after learning the contents of the present invention, several equivalent changes and substitutions can be made without departing from the principle of the present invention. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A servo motor for an eccentric device, comprising a housing and a shaft assembly, characterized in that: The housing is provided with a pivot hole, and the pivot assembly includes a pivot. The pivot is rotatably mounted inside the housing via a bearing, and at least one end of the pivot extends to the outside of the pivot hole to form the power output shaft of the servo motor. A first reinforcement is installed at the position corresponding to the bearing on the housing, and a bearing hole is provided at the position corresponding to the bearing on the housing. A second reinforcement is provided between the housing and the bearing hole.

2. A servo motor for an eccentric device according to claim 1, characterized in that: The housing includes a main housing, a front cover, and a rear cover; the main housing is a hollow housing structure with openings on both sides; the front cover and the rear cover are respectively fixedly installed on the two opening sides of the main housing, and the front cover and the rear cover are respectively provided with bearing holes, and bearings are installed on the rotating shaft at positions corresponding to the bearing holes of the front cover and the rear cover, and are rotatably installed on the housing.

3. A servo motor for an eccentric device according to claim 2, characterized in that: The front cover and the rear cover are respectively provided with a pivot hole. The pivot is located on the side of the front cover and extends to the outside of the pivot hole of the front cover to form a power output shaft.

4. A servo motor for an eccentric device according to claim 2, characterized in that: The rotating shaft has a stepped shaft diameter, with the shaft diameter on the power output shaft side being larger than that on the rear end cover side.

5. A servo motor for an eccentric device according to claim 4, characterized in that: The rotor core is fixedly installed on the intermediate shaft located between the power output shaft and the shaft located on the rear end cover side. The shaft diameter of the intermediate shaft is smaller than that of the shaft on the power output shaft side but larger than that of the shaft on the rear end cover side.

6. A servo motor for an eccentric device according to claim 2, characterized in that: The first reinforcement includes a first bearing plate and a second bearing plate. A first bearing hole is formed on the cover body facing the main housing, and a first bearing is installed inside. A first bearing plate is installed on the shaft of the first bearing away from the front cover. The first bearing plate has several threaded holes spaced around the shaft. Mounting holes are formed on the front cover at positions corresponding to the threaded holes. The first bearing plate is fixedly connected to the front cover by connecting bolts that pass through the mounting holes and are threadedly connected to the threaded holes. A second bearing hole is formed on the cover body facing the main housing, and a second bearing is installed inside. A mounting groove is formed on the cover body of the rear cover away from the second bearing hole. Several mounting threaded holes are spaced around the shaft in the mounting groove. A connecting hole is formed on the second bearing plate at positions corresponding to the mounting threaded holes. The second bearing plate is fixedly connected to the rear cover by connecting bolts that pass through the connecting holes and are threadedly connected to the mounting threaded holes.

7. A servo motor for an eccentric device according to claim 2, characterized in that: The bearings installed on the front and rear covers are all enlarged load-bearing bearings.

8. A servo motor for an eccentric device according to claim 2, characterized in that: Both the front and rear covers are thickened end covers.

9. A servo motor for an eccentric device according to claim 2, characterized in that: The second reinforcement component is a reinforcing rib; eight reinforcing ribs are evenly distributed around the pivot along the outer circumference of the bearing hole on the front end cover, and four reinforcing ribs are evenly distributed around the pivot along the outer circumference of the bearing hole on the rear end cover; all reinforcing ribs are of increased thickness type.

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