Bidirectional synchronous motor
By designing a two-way synchronous motor, using the coordinated work of multiple linear motors and rotary motors, combined with high-precision encoder, the problem of the reduction in accuracy of integrated rotary motors in the existing technology after high load and long-term use is achieved, and the improvement is achieved Low cost and higher precision motion control.
Patent Information
- Application Number
- CN202420795099.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The existing integrated rotary motor has high manufacturing cost when selecting large loads, and has low output accuracy after long-term use.
Design a two-way synchronous motor, including at least two linear motors and a rotary motor, and achieve precise position and angle sensing through linear encoder and rotary encoder. Multiple linear motors are fixedly connected to the head and tail to ensure a decrease in accuracy in one linear motor. At the same time, other linear motors can still drive the shaft body to operate accurately, and high output power is obtained by adding linear motors.
The manufacturing cost when selecting a large load is reduced, and the output accuracy is improved after long-term use. Through the coordinated work of multiple linear motors and the use of high-precision encoders, high-accuracy motion control is ensured.
Smart Images
Figure CN222283051U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor drive, in particular to a two-way synchronous motor. Background Art
[0002] Linear rotary motors are widely used in industrial production because they can achieve linear motion and rotational motion. Existing linear rotary motors are mostly separate layouts and integrated layouts. The integrated layout combines the linear motor and the rotary motor not through a coupling, but directly connects them to the output shaft, thereby achieving synchronous rotational motion and linear motion.
[0003] The output accuracy and output load of a conventional integrated linear rotary motor depend on the linear motor and rotary motor it carries. After long-term use, the linear motor and rotary motor will cause their own accuracy to decrease, which will in turn affect the accuracy of the integrated linear rotary motor. At the same time, the maximum output load of the linear motor and rotary motor is constant when manufactured at the factory, and the manufacturing cost will increase exponentially every time the output load doubles. In summary, the existing integrated rotary motor will have a high manufacturing cost when a larger load is selected, and low output accuracy after long-term use. Utility Model Content
[0004] In order to solve the defects of the existing integrated rotating motor, that is, high manufacturing cost when a large load is selected and low output accuracy after long-term use, the utility model proposes a two-way synchronous motor.
[0005] The technical solution adopted by the utility model is a two-way synchronous motor, including a shaft, a shell, a linear encoder, a rotary motor and at least two linear motors, the inner walls of the linear motor and the rotary motor are both sleeved outside the shaft and connected to the shaft, the outer walls of the linear motor and the rotary motor are both fixedly connected to the shell, the linear encoder is connected to the linear motor, and multiple linear motors are fixedly connected head to tail.
[0006] Preferably, the linear encoder is located between any two adjacent linear motors, and the two adjacent linear motors are fixedly connected end to end via the linear encoder.
[0007] Preferably, the linear motor includes a linear motor mover sleeved outside the shaft body and a linear motor stator fixedly connected to the housing, the linear motor stator and the linear encoder are both sleeved outside the linear motor mover, and the linear encoder is arranged between any two adjacent linear motor stators.
[0008] Preferably, the outer wall size of the linear encoder is the same as the outer wall size of the linear motor stator, and the housing and the linear encoder are in abutment with each other.
[0009] Preferably, the linear motor comprises at least two linear motor movers, and the plurality of linear motor movers are fixedly connected end to end.
[0010] Preferably, the linear encoder is a photoelectric linear encoder.
[0011] Preferably, a rotary encoder is also included, and the rotary encoder is connected to the rotary motor.
[0012] Preferably, the rotary motor comprises a rotary motor rotor sleeved outside the shaft body and a rotary motor stator fixedly connected to the housing, and the rotary encoder is fixedly connected to the housing and abuts against the rotary motor rotor.
[0013] Preferably, one end of the rotary encoder abuts against the rotor of the rotary motor, and the other end is fixedly connected to the housing.
[0014] Preferably, the rotary encoder is sleeved on the outside of the shaft body, and the inner wall size of the rotary encoder is the same as the cross-sectional size of the shaft body.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] The present application discloses a two-way synchronous motor, which is provided with a linear motor for driving a shaft body to slide relative to a housing, and a rotary motor for driving a housing to rotate relative to the housing, the number of linear motors is at least two, and the multiple linear motors are connected end to end and sleeved on the outside of the shaft body, so that when the linear motors are driven to operate, the multiple linear motors will move at the same time and run the same distance. When one of the linear motors has a decrease in accuracy due to long-term use, the other linear motors will still have good accuracy, so the other linear motors will still drive the shaft body to run to a set position without being affected by the decrease in accuracy of one of the linear motors. At the same time, by adding multiple linear motors, the two-way synchronous motor can obtain N times the output power of a single linear motor, N is the number of linear motors, so as to achieve the purpose of obtaining higher output power and reducing manufacturing costs. In addition, by providing a linear encoder connected to the linear motor, the operator can more accurately obtain the moving distance of the linear motor driving the shaft body, and the actual moving distance can be compared with the preset distance, further improving the output accuracy. Compared with the prior art, the two-way synchronous motor disclosed in the present application can achieve the purpose of reducing manufacturing costs when selecting a larger load and making the output accuracy higher after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention is described in detail below with reference to the embodiments and drawings, wherein:
[0018] Figure 1 A schematic structural diagram of a two-phase synchronous motor provided according to an embodiment of the utility model is shown.
[0019] Description of labels:
[0020] 10. Axis;
[0021] 20. Shell;
[0022] 30. Linear motor; 31. Linear motor stator; 32. Linear motor mover;
[0023] 40. Rotating electric machine; 41. Rotating electric machine stator; 42. Rotating electric machine rotor;
[0024] 50. Linear encoder;
[0025] 60. Rotary encoder. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Examples of embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be interpreted as limiting the utility model.
[0027] The utility model discloses a two-phase synchronous motor, please refer to Figure 1 , including a shaft body 10, a shell 20, a linear encoder 50, a rotary motor 40 and at least two linear motors 30. The inner walls of the linear motor 30 and the rotary motor 40 are both sleeved outside the shaft body 10 and connected to the shaft body 10. The outer walls of the linear motor 30 and the rotary motor 40 are both fixedly connected to the shell 20. The linear encoder 50 is connected to the linear motor 30. The multiple linear motors 30 are fixedly connected head to tail.
[0028] A linear motor 30 is provided for driving the shaft body 10 to slide relative to the housing 20, and a rotary motor 40 is provided for driving the housing 20 to rotate relative to the housing 20. There are at least two linear motors 30, and the plurality of linear motors 30 are connected end to end and sleeved on the outside of the shaft body 10, so that when the linear motors 30 are driven to operate, the plurality of linear motors 30 will move simultaneously and run the same distance. When the accuracy of one of the linear motors 30 decreases due to long-term use at the beginning, the other linear motors 30 will still have good accuracy, so the other linear motors 30 will still drive the shaft body 10 to run to the set position without being affected by the decrease in accuracy of one of the linear motors 30. At the same time, by adding a plurality of linear motors 30, the two-way synchronous motor can obtain N times the output power of a single linear motor 30, where N is the number of linear motors 30, thereby achieving the purpose of obtaining higher output power and reducing manufacturing costs. In addition, by providing a linear encoder 50 connected to the linear motor 30, the operator can more accurately obtain the moving distance of the linear motor 30 driving the shaft 10, and the actual moving distance can be compared with the preset distance, further improving the output accuracy. Compared with the prior art, the two-way synchronous motor disclosed in the present application can achieve the purpose of reducing the manufacturing cost when selecting a larger load and making the output accuracy higher after long-term use.
[0029] Specifically, the two-way synchronous motor includes a linear encoder 50, which is used to monitor the distance that the shaft body 10 moves relative to the housing 20. Compared with other displacement sensors, the linear encoder 50 has the advantages of high precision and high stability. It encodes on a coding strip or a coding disk, and then identifies the coding strip or the coding disk through an identifier to obtain the distance moved. In this application, by setting the linear encoder 50 on the linear motor 30, the linear encoder 50 can identify the movement of the shaft body 10, thereby obtaining high-precision and high-accuracy position information. In addition, the linear encoder 50 can record the trajectory of the linear motion of the shaft body 10, and its measurement results are traceable. Compared with the characteristic that the displacement sensor only sends signals at specific positions, the linear encoder 50 can record and identify each position where the shaft body 10 moves, which can make it more intelligent when installed on a two-way synchronous motor.
[0030] Obviously, in other embodiments, at least two rotary motors 40 are provided, which can achieve the same effect as providing a plurality of linear motors 30 .
[0031] In some embodiments, please refer to Figure 1 The linear encoder 50 is located between any two adjacent linear motors 30 , and the two adjacent linear motors 30 are fixedly connected head to tail through the linear encoder 50 .
[0032] Specifically, in order to achieve higher precision when the shaft body 10 slides relative to the housing 20, the number of linear motors 30 is set to two. When the shaft body 10 is controlled to slide, the linear motors 30 are started at the same time, so that the two linear motors 30 can move the same distance, thereby avoiding deviation in the sliding distance of the shaft body 10 relative to the housing 20 when one of the linear motors 30 fails or has an error.
[0033] In addition, the linear encoder 50 is set between the two linear motors 30. The two linear motors 30 can clamp the linear encoder 50. When the linear motor 30 is started, it drives the shaft body 10 to slide. The identifier or encoding bar on the linear encoder 50 and the linear motor 30 move at the same time. The distance moved is the sliding distance of the shaft body 10. Therefore, by connecting the linear encoder 50 and the linear motor 30, more accurate displacement information can be obtained compared to placing them at other positions, and more precise readings can be obtained.
[0034] In some specific embodiments, the linear motor 30 includes a linear motor mover 32 mounted outside the shaft body 10 and a linear motor stator 31 fixedly connected to the housing 20. The linear motor stator 31 and the linear encoder 50 are both mounted outside the linear motor mover 32, and the linear encoder 50 is arranged between any two adjacent linear motor stators 31.
[0035] Specifically, the linear motor 30 includes a linear motor mover 32 and a linear motor stator 31. When the linear motor 30 is running, the linear motor stator 31 and the housing 20 slide relative to the linear motor mover 32 and the shaft 10. Among them, the linear encoder 50 is arranged between the two linear motor stators 31, and the linear encoder 50 is sleeved outside the linear motor mover 32. The linear motor mover 32 has at least one linear encoder, and the length of the linear motor mover 32 needs to be greater than the length of the two linear stators and the linear encoder 50, so that the linear motor stator 31 can slide on the linear motor mover 32. In addition, the outer wall size of the linear encoder 50 is the same as the outer wall size of the linear motor 30, so as to facilitate the connection with the cylindrical housing 20, and at the same time, the linear encoder 50 is limited in all directions, so that the linear encoder 50 will not shake in all directions, thereby causing the displacement parameters obtained by the linear encoder 50 to be inaccurate.
[0036] For more specific embodiments, please refer to Figure 1 The outer wall size of the linear encoder 50 is the same as the outer wall size of the linear motor stator 31 , and the housing 20 and the linear encoder 50 are in contact with each other.
[0037] Specifically, the outer wall size of the linear encoder 50 is made the same as the outer wall size of the linear motor stator 31, and the shell 20 and the linear encoder 50 are abutted, which can further limit the linear encoder 50 and prevent the linear encoder 50 from being installed unstably, so that the linear encoder 50 can obtain a higher degree of accuracy.
[0038] For more specific embodiments, please refer to Figure 1 The linear motor 30 includes at least two linear motor movers 32, and the multiple linear motor movers are fixedly connected end to end.
[0039] Specifically, by providing a plurality of linear motor movers 32, the operator can choose the number of linear motor movers 32 to be installed and control the maximum moving distance of the linear motor mover 32 relative to the linear motor stator 31. At the same time, by providing a plurality of linear motor movers 32, it is possible to prevent the linear motor mover 32 from needing to be replaced as a whole when it is damaged. In this case, only one or several of the damaged linear motor movers 32 need to be replaced, thereby reducing costs.
[0040] In some embodiments, the linear encoder 50 is a photoelectric linear encoder 50 .
[0041] Specifically, the linear encoder 50 is a photoelectric linear encoder 50. The photoelectric linear encoder 50 recognizes the distance by etching different light and dark lines on the photoelectric code disk and releasing optical pulse signals to the photoelectric code disk through the identifier. Compared with the ordinary magnetic linear encoder 50, the electromagnetic field will not interfere with the photoelectric linear encoder 50, and the recognition stability performance during the operation is stronger. The working principle of the magnetic linear encoder 50 is to sense the distance through electromagnetic induction. A linear motor 30 and a rotary motor 40 are provided in the two-way synchronous motor. The electromagnetic field generated by the linear motor 30 and the rotary motor 40 will inevitably affect the magnetic linear encoder 50. Conversely, the magnetic linear encoder 50 will also affect the linear motor 30 and the rotary motor 40 during use. Therefore, for other structures of the two-way synchronous motor, the type of linear encoder 50 is selected as a photoelectric linear encoder 50, so that the output accuracy of the two-way synchronous motor is higher.
[0042] In some embodiments, please refer to Figure 1 , further comprising a rotary encoder 60 , which is connected to the rotary motor 40 .
[0043] Specifically, the two-way synchronous motor includes a rotary encoder 60, which is used to monitor the angle of rotation of the shaft body 10 relative to the housing 20. Compared with other angle sensors, the rotary encoder 60 has the advantages of high precision and high stability. It encodes on a coding strip or a coding disk, and then identifies the coding strip or the coding disk through an identifier to obtain the angle of rotation. In the present application, by setting the rotary encoder 60 on the rotary motor 40, the rotary encoder 60 can identify the movement of the shaft body 10, thereby obtaining high-precision and high-accuracy angle information. In addition, the rotary encoder 60 can record the trajectory of the rotational movement of the shaft body 10, and its measurement results are traceable. Compared with the characteristic that the angle sensor only sends signals at specific positions, the rotary encoder 60 can record and identify at each angle of the movement of the shaft body 10, which can make it more intelligent when installed on the two-way synchronous motor.
[0044] In some specific embodiments, the rotary motor 40 includes a rotary motor rotor 42 sleeved outside the shaft body 10 and a rotary motor stator 41 fixedly connected to the housing 20 , and the rotary encoder 60 is fixedly connected to the housing 20 and abuts against the rotary motor rotor 42 .
[0045] It should be noted that the rotary motor 40 includes a rotary motor rotor 42 and a rotary motor stator 41. When the rotary motor 40 is running, the rotary motor stator 41 and the housing 20 rotate relative to the rotary motor rotor 42 and the shaft 10. The rotary encoder 60 is fixedly connected to the housing 20 and is in contact with the rotary motor rotor 42, so that the rotary encoder 60 can sense the rotation of the rotary motor rotor 42, allowing the rotary encoder 60 to obtain more accurate angle information.
[0046] For more specific embodiments, please refer to Figure 1 One end of the rotary encoder 60 abuts against the rotary motor rotor 42 , and the other end is fixedly connected to the housing 20 .
[0047] The rotary encoder 60 is fixed to the housing 20, and the other end contacts the rotary motor rotor 42, thereby limiting the rotary encoder 60 in the axial direction; the rotary encoder 60 is sleeved on the outside of the shaft body 10, thereby further limiting it, making it more stable during use.
[0048] In some more specific embodiments, please refer to Figure 1 The rotary encoder 60 is sleeved on the outside of the shaft body 10 , and the inner wall size of the rotary encoder 60 is the same as the cross-sectional size of the shaft body 10 .
[0049] Specifically, the rotary encoder 60 is sleeved on the outside of the shaft body 10, and the inner wall size of the rotary encoder 60 is limited to the cross-sectional size of the shaft body 10. The rotary encoder 60 can be further limited to prevent the rotary encoder 60 from being installed unstably, so that the rotary encoder 60 can obtain a higher degree of accuracy.
[0050] In some specific embodiments, the rotary encoder 60 is a photoelectric linear encoder 50 .
[0051] Specifically, the rotary encoder 60 is a photoelectric rotary encoder 60. The photoelectric rotary encoder 60 realizes the recognition of the distance by etching different light and dark lines on the photoelectric code disk and releasing optical pulse signals to the photoelectric code disk through the identifier. Compared with the ordinary magnetic rotary encoder 60, the electromagnetic field will not interfere with the photoelectric rotary encoder 60, and the recognition stability performance during the working process is stronger. The working principle of the magnetic rotary encoder 60 is to realize the induction of the distance through electromagnetic induction. The linear motor 30 and the rotary motor 40 are provided in the two-way synchronous motor. The electromagnetic field generated by the linear motor 30 and the rotary motor 40 will inevitably affect the magnetic rotary encoder 60. Conversely, the magnetic rotary encoder 60 will also affect the linear motor 30 and the rotary motor 40 during use. Therefore, for other structures of the two-way synchronous motor, the type of rotary encoder 60 is selected as a photoelectric rotary encoder 60, so that the output accuracy of the two-way synchronous motor is higher.
[0052] In the description of this specification, if the terms "embodiment one", "this embodiment", "in an embodiment" and the like appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model or the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in an appropriate manner.
[0053] In the description of this specification, the terms "connect", "install", "fix", "set", "have", etc. are all understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0054] In the description of this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.
[0055] The above description of the embodiments is to facilitate ordinary technicians in the technical field to understand and apply the technology of this case. People familiar with the technology in this field can obviously make various modifications to these examples easily and apply the general principles described here to other embodiments without creative work. Therefore, this case is not limited to the above embodiments. Modifications to the following situations should all be within the scope of protection of this case: ① A new technical solution based on the technical solution of the utility model and combined with existing common knowledge, the technical effect produced by the new technical solution does not exceed the technical effect of the utility model; ② The equivalent replacement of some features of the technical solution of the utility model by using known technology, the technical effect produced is the same as the technical effect of the utility model; ③ The technical solution of the utility model can be expanded based on the technical solution of the utility model, and the substantive content of the expanded technical solution does not exceed the technical solution of the utility model; ④ The equivalent transformation made by using the contents of the specification and drawings of the utility model is directly or indirectly applied to other related technical fields.
Claims
1. A two-phase synchronous motor, characterized in that: It includes a shaft, a shell, a linear encoder, a rotary motor and at least two linear motors. The inner walls of the linear motor and the rotary motor are both sleeved outside the shaft and connected to the shaft. The outer walls of the linear motor and the rotary motor are both fixedly connected to the shell. The linear encoder is connected to the linear motor. Multiple linear motors are fixedly connected head to tail.
2. A two-phase synchronous motor according to claim 1, characterized in that: The linear encoder is located between any two adjacent linear motors, and the two adjacent linear motors are fixedly connected end to end through the linear encoder.
3. A two-phase synchronous motor according to claim 2, characterized in that: The linear motor comprises a linear motor mover sleeved outside the shaft and a linear motor stator fixedly connected to the housing. The linear motor stator and the linear encoder are both sleeved outside the linear motor mover. The linear encoder is arranged between any two adjacent linear motor stators.
4. A two-phase synchronous motor according to claim 3, characterized in that: The outer wall size of the linear encoder is the same as the outer wall size of the linear motor stator, and the housing and the linear encoder are in contact with each other.
5. A two-phase synchronous motor according to claim 3, characterized in that: The linear motor comprises at least two linear motor movers, and the plurality of linear motor movers are fixedly connected end to end.
6. A two-phase synchronous motor according to claim 1, characterized in that: The linear encoder is a photoelectric linear encoder.
7. A two-phase synchronous motor according to any one of claims 1 to 6, characterized in that: It also includes a rotary encoder, which is connected to the rotary motor.
8. A two-phase synchronous motor according to claim 7, characterized in that: The rotary motor comprises a rotary motor rotor sleeved outside the shaft body and a rotary motor stator fixedly connected to the housing. The rotary encoder is fixedly connected to the housing and abuts against the rotary motor rotor.
9. A two-phase synchronous motor according to claim 8, characterized in that: One end of the rotary encoder is in contact with the rotor of the rotary motor, and the other end is fixedly connected to the housing.
10. A two-phase synchronous motor according to claim 9, characterized in that: The rotary encoder is sleeved on the outside of the shaft body, and the inner wall size of the rotary encoder is the same as the cross-sectional size of the shaft body.