CN222638296U - An external shaft locking mechanism for a spindleless servo motor - Google Patents
An external shaft locking mechanism for a spindleless servo motor Download PDFInfo
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- CN222638296U CN222638296U CN202421009230.XU CN202421009230U CN222638296U CN 222638296 U CN222638296 U CN 222638296U CN 202421009230 U CN202421009230 U CN 202421009230U CN 222638296 U CN222638296 U CN 222638296U
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- rotating shaft
- expansion sleeve
- sleeve
- external
- servo motor
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Abstract
The utility model relates to the technical field of servo motors, in particular to an external rotating shaft locking mechanism for a spindle-free servo motor, which comprises a rotating shaft sleeve with a hollow cavity, wherein the rotating shaft sleeve is T-shaped and comprises a rotor core sleeve part and a limiting part which are mutually connected, the rotor core sleeve part is used for sleeve connection of a rotor core, the limiting part is used for radially limiting the rotor core on one side, the hollow cavity comprises an external rotating shaft penetrating cavity corresponding to the rotor core sleeve part and an external rotating shaft locking cavity corresponding to the limiting part, and an expansion sleeve assembly is arranged in the external rotating shaft locking cavity and can lock an external rotating shaft entering the external rotating shaft locking cavity. The locking mechanism is simple in structure, easy to assemble, disassemble and maintain and good in locking effect.
Description
Technical Field
The utility model relates to the technical field of servo motors, in particular to an external rotating shaft locking mechanism for a main shaft-free servo motor.
Background
The Servo Motor (Servo Motor) is an engine for controlling mechanical elements to run in a Servo system, is an indirect speed change device for assisting the Motor, can convert voltage signals into torque and rotating speed to drive a control object, and has the characteristics of high-precision speed and position control. The working principle is that the rotating speed of the rotor is controlled by an input signal and can react rapidly. In the automatic control system, the servo motor is used as an executing element, has the characteristics of small electromechanical time constant, high linearity, starting voltage and the like, and can convert the received electric signal into angular displacement or angular velocity on the motor shaft for output. Is widely applied to the automatic equipment with the characteristics of accurate positioning, high-speed movement, high torque output, high stability, low noise and the like, such as the fields of numerical control machine tools, semiconductor manufacturing, imaging equipment, packaging equipment, robots and the like.
As one type of servo motor, a shaftless servo motor is a special type of servo motor, which differs from conventional servo motors in design and construction. Specifically, shaftless servomotors do not have a traditional physical shaft, but rather directly drive the load through an internal mechanism, achieving precise position, speed and force control. The utility model discloses a Chinese patent with publication number of CN203883649U, which discloses a bearingless servo motor mounting structure and a special assembly tool, and comprises a base, wherein a main shaft is positioned in the base, a shell is fixed on the base, a hollow rotor shaft is sleeved on the main shaft, a screw is connected to the side wall of the hollow rotor shaft in a threaded manner, and the end face of the screw can be abutted against the outer side face of the main shaft. Further, a strip-shaped locking groove parallel to the axis of the main shaft is formed in the outer side face of the main shaft, the head of the screw is embedded into the locking groove, the end face of the screw can lean against the bottom face of the locking groove, and the side face of the screw can lean against the side face of the locking groove.
The external rotating shaft is connected with the hollow rotating shaft by the bolts, and the bolts are loosened in work because the external rotating shaft cannot be completely surrounded in the circumferential direction, so that the external rotating shaft is loosened.
Therefore, a new solution is needed to solve the above technical problems.
Disclosure of utility model
The utility model aims to solve the problems of the prior art, and provides an external rotating shaft locking mechanism for a spindle-free servo motor, which is used for solving the technical problems that the traditional spindle-free servo motor adopts screw connection, the external rotating shaft cannot be completely surrounded in the circumferential direction, the screw looseness is easy to occur in working, the external rotating shaft looseness is caused, and the installation needs to be disassembled.
The above purpose is realized by the following technical scheme:
The external rotating shaft locking mechanism for the spindle-free servo motor comprises a rotating shaft sleeve with a hollow cavity, wherein the rotating shaft sleeve is T-shaped and comprises a rotor core sleeve joint part and a limiting part which are connected with each other, the rotor core sleeve joint part is used for enabling a rotor core to be sleeved, the limiting part is used for radially limiting the rotor core on one side, the hollow cavity comprises an external rotating shaft penetrating cavity corresponding to the rotor core sleeve joint part and an external rotating shaft locking cavity corresponding to the limiting part, an expansion sleeve component is arranged in the external rotating shaft locking cavity, and the expansion sleeve component can lock an external rotating shaft entering the external rotating shaft locking cavity.
Further, the expansion sleeve assembly comprises a first expansion sleeve and a second expansion sleeve which are embedded in the locking cavity of the external rotating shaft, and the first expansion sleeve can sleeve the second expansion sleeve and form an annular gap between the first expansion sleeve and the second expansion sleeve.
Further, the sleeving surfaces of the first expansion sleeve and the second expansion sleeve are inclined planes.
Further, the inclination of the inclined plane is 10-45 degrees.
Further, locking threaded through holes which are symmetrical to each other are respectively formed in the first expansion sleeve and the second expansion sleeve, and locking connection is performed through locking screws.
Further, expansion joints are formed in the first expansion sleeve and the second expansion sleeve.
Further, the first expansion sleeve and the second expansion sleeve are made of rubber materials.
Further, an inertia disc is further provided between the limit portion and the rotor core.
Further, an end cover capable of sealing the external rotating shaft locking cavity is further arranged at the end part of the rotating shaft sleeve.
Further, a locking screw through hole corresponding to the locking screw through hole is further formed in the end cover.
According to the external rotating shaft locking mechanism for the spindle-free servo motor, one end of the external rotating shaft is sleeved, so that the external rotating shaft can be connected with the external rotating shaft quickly, the external rotating shaft is held tightly quickly in the circumferential direction through the expansion sleeve assembly, and the sleeved section of the external rotating shaft is locked. The locking mechanism is simple in structure, easy to assemble, disassemble and maintain and good in locking effect, and in addition, the end cover is further arranged to protect the expansion sleeve assembly, and the expansion sleeve assembly can be directly and rapidly and accurately adjusted under the condition that the end cover is not disassembled, so that locking and unlocking of an external rotating shaft can be realized.
Drawings
FIG. 1 is a schematic view of a first perspective structure of an external spindle lock mechanism for a spindle-less servo motor according to the present utility model;
FIG. 2 is a schematic view of a second perspective structure of an external spindle lock mechanism for a spindle-less servo motor according to the present utility model;
FIG. 3 is a cross-sectional view of an external spindle lock mechanism for a non-spindle servo motor according to the present utility model;
FIG. 4 is an exploded view of an external spindle lock mechanism for a non-spindle servo motor according to the present utility model;
FIG. 5 is a cross-sectional view showing the connection of a locking screw and a locking threaded through hole in an external spindle locking mechanism for a spindle-less servo motor according to the present utility model;
Fig. 6 is a cross-sectional view showing the connection of screws and threaded holes in an external spindle lock mechanism for a spindle-less servo motor according to the present utility model.
The graphic indicia:
1-a rotating shaft sleeve, 101-a hollow cavity, 102-a rotor core sleeving part, 103-a limiting part, 104-an external rotating shaft penetrating cavity and 105-an external rotating shaft locking cavity;
2-expansion sleeve components, 201-first expansion sleeves, 202-second expansion sleeves, 203-annular gaps, 204-locking threaded through holes, 205-locking screws and 206-expansion joints;
3-rotor core;
4-inertia disc;
5-end covers and 501-locking screw through holes;
6-a threaded hole;
7-screw.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. The described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-3, the external rotating shaft locking mechanism for the spindle-free servo motor comprises a rotating shaft sleeve 1 with a hollow cavity 101, wherein the rotating shaft sleeve 1 is in a T shape and comprises a rotor core sleeving part 102 and a limiting part 103 which are connected with each other, the rotor core sleeving part 102 is used for sleeving a rotor core 3, the limiting part 103 is used for radially limiting the rotor core 3 on one side, the hollow cavity 101 comprises an external rotating shaft penetrating cavity 104 corresponding to the rotor core sleeving part 102 and an external rotating shaft locking cavity 105 corresponding to the limiting part 103, an expansion sleeve assembly 2 is arranged in the external rotating shaft locking cavity 105, and the expansion sleeve assembly 2 can lock an external rotating shaft entering the external rotating shaft locking cavity 105.
Working principle:
The front end of the rotating shaft sleeve 1 is aligned with one end of the external rotating shaft and is sleeved with the rotating shaft, one end of the external rotating shaft passes through the external rotating shaft penetrating cavity 104 and then enters the external rotating shaft locking cavity 105, and is sleeved by the expansion sleeve component 2, and the purpose of locking the external rotating shaft is achieved by only tightly holding the outer wall of the external rotating shaft through adjusting the expansion sleeve component 2.
As shown in fig. 3 and 4, the expansion sleeve assembly 2 in this embodiment includes a first expansion sleeve 201 and a second expansion sleeve 202 embedded in the outer shaft locking cavity 105, where the first expansion sleeve 201 can sleeve the second expansion sleeve 202 and form an annular gap 203 therebetween.
When pressure is applied to the second expansion sleeve 202 toward the first expansion sleeve 201, the width of the annular gap 203 gradually decreases, so that the inner diameter of the inner ring of the second expansion sleeve 202 gradually decreases, thereby tightly holding the outer rotating shaft sleeved by the inner ring.
In this embodiment, the sleeve surfaces of the first expansion sleeve 201 and the second expansion sleeve 202 are inclined surfaces, so that the adjustment of the width of the annular gap 203 can be better promoted. Specifically, the inclination of the inclined plane is 10-45 degrees.
As shown in fig. 4 and fig. 5, in this embodiment, locking threaded through holes 204 that are symmetrical to each other are formed in the first expansion sleeve 201 and the second expansion sleeve 202, respectively, and are locked by locking screws 205. By rotating the locking screw 205 clockwise or anticlockwise, the width of the annular gap 203 is adjusted, and the purpose of locking the external rotating shaft is achieved.
In addition, the expansion joint 206 is formed on the first expansion sleeve 201 and the second expansion sleeve 202, and the expansion joint 206 can promote the outer diameters of the first expansion sleeve 201 and the second expansion sleeve 202 to deform when the first expansion sleeve 201 and the second expansion sleeve 202 are mutually sleeved and compressed, so that the locking of external rotating shafts with different inner diameters can be better adapted.
It should be noted that, the first expansion sleeve 201 and the second expansion sleeve 202 are made of rubber, and have the advantages of high wear resistance, high temperature resistance, aging resistance, good elasticity, and the like.
As shown in fig. 3, an inertia disc 4 is further disposed between the limiting portion 103 and the rotor core 3, and by using the inertia disc 4, a motor with a larger starting torque can be avoided, and power consumption of the motor can be effectively reduced. And the deflection of the motor rotating shaft can be reduced, and the rotating stability of the motor can be improved. .
As an optimization of this scheme, as shown in fig. 6, the end portion of the rotating shaft sleeve 1 is further provided with an end cover 5 capable of sealing the external rotating shaft locking cavity 105, and the end cover 5 not only can be used for limiting the first expansion sleeve 201 and the second expansion sleeve 202 located in the external rotating shaft locking cavity 105, but also can effectively prevent the external environment from interfering with the interior. Screw holes 6 corresponding to each other are formed in the end caps 5 and the end portions of the rotating shaft sleeve 1, and the end caps and the rotating shaft sleeve 1 are screwed together through screws 7.
As shown in fig. 4, in this embodiment, a locking screw through hole 501 corresponding to the position of the locking screw through hole 204 is further formed in the end cover 5, and the locking screw through hole 501 can facilitate penetration of the locking screw 205, so that adjustment of the locking screw 205 can be achieved without disassembling the end cover, that is, the locking screw 205 located in the external spindle locking cavity 105 and screwed with the locking screw through hole 204 is penetrated by a screwdriver.
The above description is for the purpose of illustrating the embodiments of the present utility model and is not to be construed as limiting the utility model, but is intended to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principle of the utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421009230.XU CN222638296U (en) | 2024-05-10 | 2024-05-10 | An external shaft locking mechanism for a spindleless servo motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421009230.XU CN222638296U (en) | 2024-05-10 | 2024-05-10 | An external shaft locking mechanism for a spindleless servo motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222638296U true CN222638296U (en) | 2025-03-18 |
Family
ID=94935154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421009230.XU Active CN222638296U (en) | 2024-05-10 | 2024-05-10 | An external shaft locking mechanism for a spindleless servo motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222638296U (en) |
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2024
- 2024-05-10 CN CN202421009230.XU patent/CN222638296U/en active Active
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