Combinable servo motor

Abstract

The utility model discloses a combinable servo motor, and relates to the technical field of servo motors, the combinable servo motor comprises a shell, two ends of the shell are detachably connected with a front cover and a rear cover respectively, a rotor is embedded in an inner cavity of the shell, and one end of the rotor is fixedly connected with an output shaft which penetrates through the front cover and is rotatably connected with the front cover. Through cooperative arrangement of the clamping blocks, the limiting plates, the metal elastic pieces, the baffles and other structures, the clamping blocks on the outer walls of the stators are embedded in the gaps between the two guide positioning plates in each group, and the clamping blocks are prevented from sliding out of the adjacent sides of the two groups of guide positioning plates through mutual supporting of the two stators; meanwhile, limiting plates and baffles arranged at the two ends of clamping blocks are clamped at the two ends of the guide positioning plates, the clamping blocks are prevented from moving in the two sets of guide positioning plates in the length directions of the guide positioning plates, and the situation that a stator of an existing servo motor is clamped only through limiting grooves and limiting plates, and the clamping position is prone to falling off due to vibration generated when the motor works is avoided as much as possible; and the installation stability of the stator is severely influenced.

Description

Technical Field

[0001] This application relates to the technical field of servo motors, and in particular to a combinable servo motor. Background Art

[0002] Servo motors can control speed with very accurate position accuracy. They can convert voltage signals into torque and rotational speed to drive and control objects. The rotational speed of the servo motor rotor is controlled by the input signal and can respond quickly. In an automatic control system, it is used as an actuator and has characteristics such as a small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. It is divided into two categories: DC and AC servo motors. Its main feature is that there is no self-rotation phenomenon when the signal voltage is zero, and the rotational speed decreases uniformly with the increase of torque.

[0003] The utility model patent with the publication number CN215452653U proposes a combinable servo motor, including a motor main body, a heat dissipation component, and a disassembly and assembly component. A clamping component for component combination is arranged inside the motor main body. The heat dissipation component for motor heat dissipation is arranged on the outer side of the center of the motor main body. And a protection component for motor protection is arranged on the outside of the motor main body. The disassembly and assembly component for component disassembly and assembly is arranged inside the right end of the protection component. The motor main body includes a mounting plate, a bearing, an end cover, a rotating shaft, a rotor, a stator, a first housing, a second housing, a third housing, and an encoder. A bearing is arranged inside the mounting plate, and an end cover is arranged at the left end of the bearing. A rotating shaft is arranged inside the bearing, and a rotor is arranged in the center of the rotating shaft. A stator is arranged above the rotor, and a first housing is arranged on the top surface of the stator. The right end of the first housing is connected to a second housing, and a third housing is arranged at the right end of the second housing. An encoder is arranged inside the third housing. The clamping component includes a first limiting groove, a first limiting block, a second limiting groove, and a second limiting block. The first limiting block is slidably connected inside the first limiting groove. The second limiting groove is opened at the lower left end of the stator, and a second limiting block is fixed at the lower right end of the stator.

[0004] The stator of the above-mentioned servo motor is only clamped by the limiting groove and the limiting plate, lacking the limitation of the clamping position. When the servo motor works, the clamping position of the stator is prone to fall off due to vibration, seriously affecting the stability of the stator installation. Summary of the Utility Model

[0005] The purpose of the present utility model is to solve or at least alleviate the problem that the stator of the existing servo motor is only clamped by the limiting groove and the limiting plate, and the clamping position is prone to fall off due to the vibration generated during the operation of the motor, seriously affecting the stability of the stator installation.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A combinable servo motor includes a housing with a front cover and a rear cover detachably connected to both ends respectively. A rotor is embedded in the inner cavity of the housing. One end of the rotor is fixedly connected to an output shaft that penetrates the front cover and is rotatably connected to the front cover. Two stators are symmetrically arranged on both sides of the rotor. On the outer walls of the middle sections of the two stators, clamping blocks are fixedly connected. One end of the clamping block close to the front cover is fixedly connected with a limiting plate. The other end of the clamping block is fixedly connected with two parallel metal elastic sheets. The ends of the two metal elastic sheets away from the clamping block are bent outwards to form a baffle structure. On the inner wall of the housing, two groups of symmetrically arranged guiding and positioning plates are fixedly connected. A gap for accommodating the clamping block is left between the two guiding and positioning plates in each group.

[0008] By adopting the above technical solutions, during use, the two metal elastic sheets fixedly connected to the end of the clamping block are squeezed towards each other, so that the baffles formed by the bending of the ends of the two metal elastic sheets move towards each other until the distance between the two ends away from each other is less than the width of the gap left between a group of guiding and positioning plates. Then, the metal elastic sheets are inserted into the gap from the front end of the guiding and positioning plates, and the clamping block is pushed to move until the limiting plate fits against the front end of the guiding and positioning plate. At this time, the metal elastic sheets just slide out of the gap, and the baffles pop out and reset under the limiting action of the guiding and positioning plates on both sides, and tightly fit against the rear end of the guiding and positioning plates, thereby clamping and fixing the clamping block in the gap between a group of guiding and positioning plates, and the fixing work of the stator can be realized. The two stators support each other to prevent the clamping block from sliding out from the adjacent sides of the two groups of guiding and positioning plates. At the same time, the limiting plates and baffles arranged at both ends of the clamping block are clamped at both ends of the guiding and positioning plates to prevent the clamping block from moving along the length direction of the guiding and positioning plates in the two groups of guiding and positioning plates, greatly improving the stability of the stator installation, and avoiding as much as possible the problem that the stator of the existing servo motor is only clamped by the limiting groove and the limiting plate, and the clamping position is prone to fall off due to the vibration generated during the operation of the motor, seriously affecting the stability of the stator installation.

[0009] Optionally, an insertion pipe with an outer diameter equal to the inner diameter of the front cover extends outwards from the front end of the housing. Threaded holes are provided on the circumferential side of the insertion pipe, and screws passing through the side wall of the front cover and aligned with the threaded holes are provided on the side wall of the front cover. After passing through the side wall of the front cover, the screws are screwed with the insertion pipe through the threaded holes.

[0010] By adopting the above technical solutions, during use, the insertion pipe is inserted into the inner cavity of the front cover, and the front cover is rotated to align the threaded holes and the screws, and then the front cover can be installed on the front end of the housing through the screws.

[0011] Optionally, a joint is integrally formed on the side of the rear cover close to the housing, and the rear cover is screwed to the inner wall of the housing through the joint.

[0012] By adopting the above technical solutions, the joint is provided to screw the rear cover to the rear end of the housing. The screw connection method not only has a firm connection, but also is convenient for the installation and disassembly of the rear cover.

[0013] Optionally, bearings are installed at the joints of the rotor and the rear cover, and the output shaft and the front cover. A end cover is fixedly connected to the outside of the front cover and sleeved on the output shaft and rotatably connected to the output shaft.

[0014] By adopting the above technical solutions, bearings are provided to reduce the frictional resistance acting on the rotor and the output shaft during rotation, and the end cover is provided to protect the bearing embedded in the center of the front cover.

[0015] Optionally, the stator is in a semi-circular ring structure. After two stators are spliced, they are sleeved on the outer surface of the rotor, and a gap is left between the inner wall of the stator and the outer surface of the rotor.

[0016] By adopting the above technical solutions, both stators are set in a semi-circular ring structure, so that the two stators can support each other after being spliced, preventing the clamping blocks installed on the two stators from falling off from the gap between a set of guiding and positioning plates.

[0017] Optionally, the distance between the limiting plate and the baffle formed by bending the end of the metal elastic sheet is equal to the length of the guiding and positioning plate.

[0018] By adopting the above technical solutions, after the clamping block is inserted into the gap between a set of guiding and positioning plates, it can be clamped at both ends of the guiding and positioning plate by the limiting plate and the baffle formed by bending the end of the metal elastic sheet, clamping and fixing the clamping block.

[0019] Optionally, an expansion block for expanding the two metal elastic sheets is inserted between the two metal elastic sheets. After the rear cover is connected to the housing, the joint just abuts against the end of the expansion block away from the clamping block.

[0020] By adopting the above technical solutions, the expansion block is provided to be inserted between the two metal elastic sheets, minimizing the problem that the metal elastic sheet is deformed under force, resulting in unstable clamping of the baffle.

[0021] Optionally, a mounting seat is fixedly connected to the outer wall of the housing, and through holes for connecting to an external frame are symmetrically opened at both ends of the mounting seat.

[0022] By adopting the above technical solutions, when the user uses it, an external bolt can be passed through the through hole to penetrate the mounting seat and be screwed onto the external frame, facilitating the user to install the servo motor.

[0023] In summary, the beneficial effects of this application are as follows:

[0024] Through the cooperative setting among structures such as clamping blocks, limiting plates, metal elastic sheets and baffles, the clamping blocks on the outer wall of the stator are embedded in the gaps between two guiding and positioning plates in each group. The two stators support each other to prevent the clamping blocks from sliding out from the adjacent sides of the two groups of guiding and positioning plates. At the same time, the limiting plates and baffles arranged at both ends of the clamping blocks are used to clamp the two ends of the guiding and positioning plates, preventing the clamping blocks from moving along the length direction of the guiding and positioning plates within the two groups of guiding and positioning plates, thus avoiding as much as possible the problem that the stator of the existing servo motor is only clamped by limiting grooves and limiting plates, and the clamping position is likely to fall off due to the vibration generated during the operation of the motor, seriously affecting the installation stability of the stator. Brief Description of the Drawings

[0025] Figure 1 is the exploded view of the overall three-dimensional structure of the present application;

[0026] Figure 2 is the schematic diagram of the internal connection structure of the housing of the present application;

[0027] Figure 3 is the schematic diagram of the installation structure of the stator of the present application.

[0028] Description of the Reference Numerals: 1. Housing; 2. Insertion pipe; 3. Threaded hole; 4. Front cover; 5. Screw; 6. Rear cover; 7. Connector; 8. Rotor; 9. Output shaft; 10. Bearing; 11. End cover; 12. Stator; 13. Clamping block; 14. Limiting plate; 15. Metal elastic sheet; 16. Expansion block; 17. Guiding and positioning plate; 18. Mounting seat. Detailed Description of the Embodiment

[0029] The following further elaborates on the present application Figures 1-3 in detail with reference to the attached drawings.

[0030] Please refer to Figures 1-3 , a combinable servo motor, including a housing 1 with a front cover 4 and a rear cover 6 detachably connected to both ends respectively. By setting the front cover 4 and the rear cover 6, the openings at both ends of the housing 1 are sealed, so as to avoid as much as possible the entry of sundries in the external environment into the interior of the housing 1 and affect the operation of the components inside the housing 1.

[0031] A rotor 8 is embedded in the inner cavity of the housing 1. One end of the rotor 8 is fixedly connected with an output shaft 9 that penetrates through the front cover 4 and is rotatably connected to the front cover 4. Two stators 12 are symmetrically arranged on both sides of the rotor 8. After the two stators 12 are assembled, they form an annular structure sleeved on the periphery of the rotor 8. When the motor is powered on, the rotor 8 rotates at a high speed between the stators 12 under the action of the magnetic field force, thereby driving the output shaft 9 to rotate at a high speed.

[0032] On the outer walls of the middle sections of the two stators 12, there are fixedly connected clamping blocks 13. One end of the clamping block 13 close to the front cover 4 is fixedly connected with a limiting plate 14, and the other end of the clamping block 13 is fixedly connected with two mutually parallel metal elastic pieces 15. The ends of the two metal elastic pieces 15 away from the clamping block 13 are bent outwards to form a baffle structure. On the inner wall of the housing 1, there are fixedly connected two groups of symmetrically arranged guiding and positioning plates 17. A gap for accommodating the clamping block 13 is left between the two guiding and positioning plates 17 in each group. When the user uses it, squeeze the two metal elastic pieces 15 fixedly connected to the end of the clamping block 13 towards each other, so that the baffles formed by the bending of the ends of the two metal elastic pieces 15 move towards each other until the distance between the two ends away from each other is less than the width of the gap left between the guiding and positioning plates 17. Then insert the metal elastic pieces 15 into the gap from the front end of the guiding and positioning plates 17, and push the clamping block 13 to move until the limiting plate 14 fits against the front end of the guiding and positioning plates 17. At this time, the metal elastic pieces 15 just slide out of the gap, and the baffle loses the limiting effect of the two guiding and positioning plates 17 on both sides and pops out reset, and tightly fits against the rear end of the guiding and positioning plates 17, thereby clamping and fixing the clamping block 13 in the gap between a group of guiding and positioning plates 17.

[0033] Refer to Figure 1 As shown in the figure, an insertion pipe 2 with an outer diameter equal to the inner diameter of the front cover 4 extends outwards from the front end of the housing 1. Threaded holes 3 are provided on the circumferential side of the insertion pipe 2, and screws 5 aligned with the threaded holes 3 are passed through the side wall of the front cover 4. After the screw 5 penetrates through the side wall of the front cover 4, it is screwed with the insertion pipe 2 through the threaded hole 3. When in use, insert the insertion pipe 2 into the inner cavity of the front cover 4, and rotate the front cover 4 to align the threaded hole 3 and the screw 5, then the front cover 4 can be installed on the front end of the housing 1 through the screw 5.

[0034] Refer to Figure 1 As shown in the figure, a joint 7 is integrally formed on one side of the rear cover 6 close to the housing 1, and the rear cover 6 is screwed to the inner wall of the housing 1 through the joint 7. The joint 7 is provided to screw the rear cover 6 to the rear end of the housing 1. The screwed connection method not only has a firm connection, but also is convenient for installing and disassembling the rear cover 6.

[0035] Refer to Figure 2 As shown in the figure, bearings 10 are installed at the connections between the rotor 8 and the rear cover 6, and between the output shaft 9 and the front cover 4. A end cover 11 sleeved on the output shaft 9 and rotatably connected to the output shaft 9 is also fixedly connected to the outside of the front cover 4. The bearing 10 is provided to reduce the frictional resistance when the rotor 8 and the output shaft 9 rotate, and the end cover 11 is provided to protect the bearing 10 embedded in the center of the front cover 4.

[0036] Refer to Figure 3The stator 12 is a semicircular ring structure, and the two stators 12 are spliced ​​and sleeved on the outer surface of the rotor 8, and a gap is left between the inner wall of the stator 12 and the outer surface of the rotor 8. The two stators 12 are both set to a semicircular ring structure, so that the two stators 12 can support each other after splicing, and prevent the block 13 installed on the two stators 12 from falling off from the gap between a set of guide positioning plates 17.

[0037] Reference Figure 3 The spacing between the limit plate 14 and the baffle formed by the bent end of the metal spring sheet 15 is equal to the length of the guide positioning plate 17. After the clamping block 13 is inserted into the gap between a group of guide positioning plates 17, it can be clamped at both ends of the guide positioning plates 17 by the limit plate 14 and the baffle formed by the bent end of the metal spring sheet 15, so as to clamp and fix the clamping block 13.

[0038] Reference Figure 3 An expansion block 16 is inserted between the two metal springs 15 to expand the two metal springs 15. After the rear cover 6 is connected to the housing 1, the connector 7 is in contact with the end of the expansion block 16 away from the clamping block 13. The expansion block 16 is arranged to be inserted between the two metal springs 15 to avoid the problem that the metal springs 15 are deformed by force, which causes the baffle to be unable to be stably clamped.

[0039] Reference Figure 1 The outer wall of the housing 1 is fixedly connected with a mounting seat 18, and through holes for connecting with an external frame are symmetrically opened at both ends of the mounting seat 18. When the user uses it, the external bolts can pass through the through holes through the mounting seat 18 and be screwed to the external frame, which is convenient for the user to install the servo motor.

[0040] The implementation principle of this application is as follows: When in use, two metal elastic pieces 15 fixedly connected to the end of the clamping block 13 are squeezed towards each other, so that the baffles formed by the bending of the ends of the two metal elastic pieces 15 move towards each other until the distance between the ends of the two baffles away from each other is less than the width of the gap left between a set of guiding and positioning plates 17. Then, the metal elastic pieces 15 are inserted into the gap from the front end of the guiding and positioning plates 17, and the clamping block 13 is pushed to move until the limiting plate 14 is in contact with the front end of the guiding and positioning plates 17. At this time, the metal elastic pieces 15 just slide out of the gap, and the baffles pop out of reset without the limiting effect of the guiding and positioning plates 17 on both sides and are in close contact with the rear end of the guiding and positioning plates 17, so as to clamp and fix the clamping block 13 in the gap between a set of guiding and positioning plates 17, and the fixing work of the stator 12 can be realized. The two stators 12 support each other to prevent the clamping block 13 from sliding out from the adjacent sides of the two sets of guiding and positioning plates 17. At the same time, the limiting plates 14 and the baffles arranged at both ends of the clamping block 13 are clamped at both ends of the guiding and positioning plates 17 to prevent the clamping block 13 from moving along the length direction of the guiding and positioning plates 17 in the two sets of guiding and positioning plates 17, greatly improving the installation stability of the stator 12 and avoiding as much as possible the problem that the stator 12 of the existing servo motor is only clamped by the limiting groove and the limiting plate, and the clamping position is easy to fall off due to the vibration generated during the operation of the motor, seriously affecting the installation stability of the stator 12.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A modular servo motor, comprising a housing (1) with a front cover (4) and a rear cover (6) detachably connected at both ends, a rotor (8) embedded in an inner cavity of the housing (1), one end of the rotor (8) being fixedly connected to an output shaft (9) penetrating the front cover (4) and rotatably connected to the front cover (4), two stators (12) being symmetrically arranged on both sides of the rotor (8), characterized in that: A clamping block (13) is fixedly connected to the outer wall of the middle section of the two stators (12); one end of the clamping block (13) close to the front cover (4) is fixedly connected to a limiting plate (14); the other end of the clamping block (13) is fixedly connected to two mutually parallel metal spring sheets (15); one end of the two metal spring sheets (15) away from the clamping block (13) is bent outward to form a baffle structure; two groups of symmetrically arranged guide positioning plates (17) are fixedly connected to the inner wall of the shell (1); a gap for accommodating the clamping block (13) is left between the two guide positioning plates (17) in each group.

2. A modular servo motor according to claim 1, characterized in that: The front end of the shell (1) extends outward to form a plug-in tube (2) having an outer diameter equal to the inner diameter of the front cover (4); a threaded hole (3) is provided on the circumference of the plug-in tube (2); a screw (5) is passed through the side wall of the front cover (4) and is positioned opposite to the threaded hole (3); the screw (5) passes through the side wall of the front cover (4) and is threadedly connected to the plug-in tube (2) through the threaded hole (3).

3. The modular servo motor according to claim 1, characterized in that: A joint (7) is integrally formed on a side of the rear cover (6) close to the shell (1), and the rear cover (6) is screwed to the inner wall of the shell (1) via the joint (7).

4. The modular servo motor according to claim 1, characterized in that: Bearings (10) are installed at the connection points between the rotor (8) and the rear cover (6), and between the output shaft (9) and the front cover (4), and an end cover (11) sleeved on the output shaft (9) and rotatably connected to the output shaft (9) is fixedly connected to the outer side of the front cover (4).

5. The modular servo motor according to claim 4, characterized in that: The stator (12) is in a semicircular ring structure. Two stators (12) are spliced ​​and sleeved on the outer surface of the rotor (8). A gap is left between the inner wall of the stator (12) and the outer surface of the rotor (8).

6. The modular servo motor according to claim 5, characterized in that: The distance between the limiting plate (14) and the baffle formed by bending the end of the metal spring sheet (15) is equal to the length of the guide positioning plate (17).

7. The modular servo motor according to claim 3, characterized in that: An expansion block (16) for expanding the two metal spring sheets (15) is inserted between the two metal spring sheets (15). After the rear cover (6) is connected to the housing (1), the connector (7) is in contact with an end of the expansion block (16) away from the clamping block (13).

8. The modular servo motor according to claim 1, characterized in that: A mounting seat (18) is fixedly connected to the outer wall of the shell (1), and through holes for connecting to an external frame are symmetrically provided at both ends of the mounting seat (18).

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