Motor and dual-redundancy rotary transformer thereof

Abstract

The utility model relates to a motor and a dual-redundancy rotary transformer thereof, belongs to the technical field of motor equipment, and solves the problem of overlarge overall size of a dual-redundancy rotary transformer of a motor in the prior art. The resolver comprises a first resolver, a second resolver, an end cover, a resolver stator sleeve and a resolver cover, wherein the end cover is fixedly arranged on the motor shell, and the rotary transformer stator sleeve is fixedly arranged on the end cover in the circumferential direction and is pressed tightly through the rotary transformer cover in the axial direction; the first rotary transformer is fixedly arranged on the end cover, the second rotary transformer is fixedly arranged on the rotary transformer stator sleeve, and the rotary transformer cover is fixedly arranged on the end cover. According to the utility model, the two groups of rotary transformer stators are axially overlapped and mounted instead of being mounted in a staggered manner in the circumferential direction, so that a rectangular mounting space is formed, and the overall size is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor equipment, in particular to a motor and a dual-redundant rotary transformer thereof. Background Art

[0002] Resolvers are used in small AC motors. They consist of a resolver stator and a resolver rotor. They are often used to detect motor speed by measuring angular velocity. In dual-redundant motors, two resolvers are typically installed to improve system reliability.

[0003] When two sets of rotary transformers need to be installed on the same side of the motor axis, in order to ensure the assembly space of the two sets of rotary transformers, the motor dimensions generally need to be enlarged. Figure 1 As shown, first install resolver stator 21 in resolver stator housing 15, then mount resolver stator housing 15 on end cap 3. Finally, tighten with resolver stator pressure plate 7 and secure with mounting bolts. The two sets of resolver stators are mounted on the end cap with circumferential offsets, increasing the overall size by approximately 50% in the direction of the resolver stator's outer diameter.

[0004] This installation method increases the overall size of the motor and cannot meet the installation environment with strict requirements on motor size. Utility Model Content

[0005] In view of the above analysis, the embodiments of the present invention aim to provide a motor and a dual-redundant rotary transformer thereof, so as to solve the problem of the dual-redundant rotary transformer of the motor being too large in overall size in the prior art.

[0006] On the one hand, the utility model provides a dual-redundancy rotary transformer, including a first rotary transformer, a second rotary transformer, an end cover, a rotary transformer stator sleeve and a rotary transformer cover; wherein, the end cover is fixedly arranged on the housing of the motor, and the rotary transformer stator sleeve is circumferentially fixedly arranged on the end cover; the first rotary transformer is fixedly arranged on the end cover, and the second rotary transformer is fixedly arranged on the rotary transformer stator sleeve, the first rotary transformer and the second rotary transformer are axially overlapped and installed, the rotary transformer cover is fixedly arranged on the end cover, and the rotary transformer cover axially presses the rotary transformer stator sleeve.

[0007] Furthermore, the end cover includes a square base plate and a mounting ring arranged on the base plate, the base plate is fixedly connected to the housing of the motor, the motor shaft of the motor passes through the through hole in the center of the base plate and extends into the mounting ring; the first rotating transformer is fixedly arranged in the mounting ring.

[0008] Furthermore, it also includes a first pressing plate, which is pressed on the first rotary transformer and fixedly connected to the upper end of the mounting ring through bolts.

[0009] Furthermore, the resolver stator sleeve is coaxial with the mounting ring; a slot is provided at the upper end of the mounting ring, and a protrusion is provided at the lower end of the resolver stator sleeve, and the protrusion is adapted to the slot.

[0010] Furthermore, a first wire outlet hole is provided on the circumferential wall of the resolver stator sleeve.

[0011] Furthermore, it also includes a second pressing plate, which is pressed on the second rotating transformer and fixedly connected to the upper end of the rotating transformer stator sleeve through bolts.

[0012] Furthermore, an inwardly protruding pressing surface is provided on the inner side wall of the resolver cover, and the pressing surface abuts against the upper end surface of the resolver stator sleeve.

[0013] Furthermore, a second wire outlet hole and a third wire outlet hole are provided on the cylinder wall of the rotary cover.

[0014] Furthermore, the rotary cover is sleeved outside the mounting ring of the end cover and is fixedly connected to the bottom plate of the end cover.

[0015] On the other hand, the present invention further provides a motor comprising the above-mentioned dual-redundant rotary transformer.

[0016] Compared with the existing technology, the present invention has the beneficial effect of increasing the overall size of the motor by only 10% in the direction of the resolver stator outer diameter after the two resolver sets are installed. By replacing the circumferentially staggered mounting of the two resolver stators with axially overlapping mounting at four locations corresponding to the four corners of the mounting ring and the base plate, a rectangular installation space is created, further reducing the overall size.

[0017] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols denote the same components.

[0019] Figure 1 It is a structural diagram of an existing dual-redundancy rotary transformer;

[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 3 for Figure 2 sectional view of

[0022] Figure 4 Schematic diagram of the structure of the resolver stator sleeve and end cover;

[0023] Figure 5 It is a structural diagram of the rotary cover;

[0024] Figure 6 Schematic diagram of the structure of the end cover;

[0025] Figure 7 Schematic diagram of the structure of the first pressing plate.

[0026] Reference numerals:

[0027] 11-first resolver stator; 12-first resolver rotor; 15-resolver stator housing; 2-second resolver; 21-second resolver stator; 22-second resolver rotor; 3-end cover; 31-base plate; 32-mounting ring; 33-first mounting hole; 34-second mounting hole; 35-slot; 36-third mounting hole; 4-pad; 5-resolver stator sleeve; 51-first outlet hole; 6-resolver cover; 61-second outlet hole; 62-third outlet hole; 63-pressing surface; 7-resolver stator pressure plate; 71-first pressure plate; 72-second pressure plate; 73-first positioning hole; 8-motor; 81-motor shaft; 9-resolver rotor gasket; 10-resolver rotor mounting bolt. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0029] Example 1

[0030] In view of the deficiencies of the prior art, the utility model provides a dual-redundancy rotary transformer, which can reduce the installation size of the rotary transformer.

[0031] A dual-redundancy rotary transformer comprises a first rotary transformer, a second rotary transformer 2, an end cover 3, a rotary transformer stator sleeve 5 and a rotary transformer cover 6.

[0032] Among them, see Figure 2-Figure 4 The end cover 3 is fixed on the motor housing, and the motor shaft 81 passes through the through hole in the middle of the end cover 3 and extends outward. Figure 6The end cap 3 includes a square base plate 31 and a mounting ring 32 fixed to the base plate. The base plate 31 is fixed to the motor. A first mounting hole 33 is provided at each of the four corners of the base plate 31. A second mounting hole 34 is provided adjacent to each first mounting hole 33. The base plate 31 is fixed to the motor via the second mounting holes 34. The end surface of the mounting ring 32 has four third mounting holes 36 evenly distributed around the circumference, with a slot 35 provided between two third mounting holes 36.

[0033] The first resolver consists of a first resolver stator 11 and a first resolver rotor 12, and is disposed within the mounting ring 32 of the end cap 3. The first resolver rotor 12 is mounted on the motor shaft 81, and the first resolver stator 11 is mounted between the mounting ring 32 on the end cap 3 and the first resolver rotor 12.

[0034] See also Figure 7 The first pressing plate 71 is an annular plate, and four first positioning holes 73 are evenly distributed around its outer circumference. Figure 3 After the first pressure plate 71 presses the first resolver stator 11 , bolts are passed through the first positioning hole 73 and the third mounting hole 36 on the mounting ring 32 to fix the first resolver stator 11 of the first resolver on the end cover 3 .

[0035] The second resolver 2 is composed of a second resolver stator 21 and a second resolver rotor 22. The second resolver rotor 22 is mounted on the motor shaft 81, and the second resolver stator 21 is disposed between the second resolver rotor 22 and the resolver stator sleeve 5.

[0036] See also Figure 4 The resolver stator sleeve 5 is mounted on the end cap 3. The resolver stator sleeve 5 is roughly annular, with four fourth mounting holes evenly distributed around its circumference. A downwardly projecting protrusion is provided between each pair of fourth mounting holes. The shape and size of this protrusion match the slot on the mounting ring 32. The fourth mounting holes are axially aligned with the third mounting holes, allowing the first and second resolver 2 to overlap axially. During installation, the resolver stator sleeve 5 is placed over the second resolver stator 21, with the protrusions snapping into the slots.

[0037] By providing a stopper and a slot on the end cover 3 , the coaxiality of the installation of the resolver stator sleeve 5 is ensured, and the resolver stator sleeve 5 is prevented from circumferential rotation.

[0038] A first wire outlet hole 51 is further provided on the circumferential surface of the resolver stator sleeve 5 for leading out wires of the first resolver stator 11 .

[0039] The structure of the second pressure plate 7 is the same as that of the first pressure plate 71. Four second positioning holes are evenly distributed on its outer circumference. After the second pressure plate 7 presses the second resolver stator 21, the second resolver 2 is fixed to the resolver stator sleeve 5 using the second positioning holes and the fourth mounting holes for bolts.

[0040] A spacer 4 is mounted between the first resolver rotor 12 and the second resolver rotor 22. The spacer 4 is also mounted on the motor shaft 81. The spacer 4 maintains a fixed distance between the first resolver rotor 12 and the second resolver rotor 22, preventing the movement of the first resolver rotor 12 and the second resolver rotor 22 from interfering with each other.

[0041] The end of the motor shaft 81 is provided with a threaded hole, and the second resolver rotor 22 is pressed by the resolver rotor gasket 9 and the resolver rotor mounting bolt 10. Figure 3 shown.

[0042] like Figure 5 As shown, the resolver cover 6 is a square cylindrical housing that covers the exterior of the resolver stator sleeve 5 and the end cap 3 and is fixedly connected to the end cap 3. Specifically, the shape and size of the resolver cover 6 are compatible with the base plate 31 of the end cap 3. The resolver cover 6 has threaded holes extending through each of its four corners. Bolts pass through the first mounting holes on the base plate 31 of the end cap 3 and extend into these threaded holes, securing the resolver cover 6 to the end cap 3.

[0043] An inwardly protruding pressing surface 63 is further provided on the inner wall of the resolver cover 6 . During assembly, the pressing surface 63 abuts against the upper end surface of the resolver stator sleeve 5 to achieve axial positioning of the resolver stator sleeve 5 .

[0044] A second wire outlet hole 61 and a third wire outlet hole 62 are provided on the cylindrical wall of the resolver cover 6 for leading out the lead wires of the first resolver stator 11 and the second resolver stator 21 .

[0045] The assembly process of the dual-redundancy rotary transformer of this embodiment is as follows:

[0046] Install the first resolver rotor 12 on the motor shaft 81 , then install the spacer block 4 , the second resolver rotor 22 , and the resolver rotor gasket 9 in sequence. Finally, screw the resolver rotor mounting bolts 10 into the threaded holes of the motor shaft 81 , and tighten them to tighten the first resolver rotor 12 and the second resolver rotor 22 .

[0047] The first resolver stator 11 is then installed into the end cap 3. After adjusting it to the proper position, it is tightened with the first pressure plate 71, and a bolt is screwed into the third mounting hole of the end cap 3. Next, the resolver stator sleeve 5 is installed into the end cap 3, aligning the four slots. The lead wires of the first resolver stator 11 are then led out through the first lead hole 51. The second resolver stator 21 is installed into the resolver stator sleeve 5. After adjusting it to the proper position, it is tightened with the second pressure plate 7, and a bolt is screwed into the fourth mounting hole of the resolver stator sleeve 5.

[0048] like Figure 3 and Figure 5As shown, the lead wires of the first resolver stator 11 are led out from the second lead wire hole 61 of the resolver cover 6; the lead wires of the second resolver stator 21 are led out from the third lead wire hole 62. When the resolver cover 6 is installed, the pressing surface 63 is in contact with the end surface of the resolver stator sleeve 5, and the bolts are inserted from the first mounting holes of the end cover 3 and screwed into the threaded holes of the resolver cover 6, thereby axially pressing the resolver stator sleeve 5.

[0049] Example 2

[0050] The utility model provides a motor, comprising the dual-redundant rotary transformer described in embodiment 1.

[0051] Compared with the prior art, this embodiment provides a dual-redundant rotary transformer, and the overall size of the two sets of rotary transformers after installation is only increased by 10% in the direction of the outer diameter of the rotary transformer stator, which is conducive to reducing the overall size of the motor.

[0052] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A dual-redundant rotary transformer, characterized in that: The motor comprises a first rotary transformer, a second rotary transformer, an end cover, a rotary transformer stator sleeve and a rotary transformer cover; wherein the end cover is used to be fixedly arranged on the housing of the motor, and the rotary transformer stator sleeve is circumferentially fixedly arranged on the end cover; the first rotary transformer is fixedly arranged on the end cover, and the second rotary transformer is fixedly arranged on the rotary transformer stator sleeve, the first rotary transformer and the second rotary transformer are axially overlapped and installed, the rotary transformer cover is fixedly arranged on the end cover, and the rotary transformer cover axially presses the rotary transformer stator sleeve.

2. The dual-redundant rotary transformer according to claim 1, characterized in that: The end cover includes a square base plate and a mounting ring arranged on the base plate. The base plate is fixedly connected to the housing of the motor. The motor shaft of the motor passes through the through hole in the center of the base plate and extends into the mounting ring. The first rotating transformer is fixedly arranged in the mounting ring.

3. The dual-redundant rotary transformer according to claim 2, characterized in that: It also includes a first pressing plate, which is pressed on the first rotary transformer and is fixedly connected to the upper end of the mounting ring through bolts.

4. The dual-redundant rotary transformer according to claim 2 or 3, characterized in that: The resolver stator sleeve is coaxial with the mounting ring; a slot is provided at the upper end of the mounting ring, and a protrusion is provided at the lower end of the resolver stator sleeve, and the protrusion is adapted to the slot.

5. The dual-redundant rotary transformer according to claim 4, characterized in that: A first wire outlet hole is provided on the circumferential wall of the resolver stator sleeve.

6. The dual-redundant rotary transformer according to claim 5, characterized in that: It also includes a second pressing plate, which is pressed on the second rotary transformer and fixedly connected to the upper end of the rotary transformer stator sleeve through bolts.

7. The dual-redundant rotary transformer according to claim 1, characterized in that: An inwardly protruding pressing surface is provided on the inner side wall of the resolver cover, and the pressing surface abuts against the upper end surface of the resolver stator sleeve.

8. The dual-redundant rotary transformer according to claim 7, characterized in that: A second wire outlet hole and a third wire outlet hole are provided on the cylinder wall of the rotary cover.

9. The dual-redundant rotary transformer according to claim 2, characterized in that: The rotary cover is sleeved outside the mounting ring of the end cover and is fixedly connected to the bottom plate of the end cover.

10. A motor, characterized in that: The invention comprises the dual-redundant rotary transformer according to any one of claims 1 to 9.

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