Miniature rotary transformer transmitter

Abstract

The utility model provides a miniature rotary transformer transmitter, which comprises a shell with a shell cavity, an end cover connected and matched with the shell, used for shielding one end of the shell cavity and provided with an end cover bearing chamber, a rotary transformer stator and rotor assembly at least partially accommodated in the shell cavity, and a gasket arranged between the end cover and the rotary transformer stator and rotor assembly, wherein the gasket is provided with at least one wave crest part or wave trough part along the circumferential direction. The utility model has the advantages that the end cover and the rotary transformer stator assembly are ensured to be connected in a high and low temperature environment by adopting the wave-shaped body structure of the gasket, the rotary transformer precision is not changed, and the integrated rotary transformer installation is adopted, so that the miniaturization is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of resolver transmitters, and more particularly to a miniature resolver transmitter. Background Art

[0002] In recent years, as a position sensor using the principle of electromagnetic induction, the resolver transmitter has very high position accuracy and repeatability accuracy, and can meet the use requirements of tens of thousands of revolutions per minute. Therefore, it is applicable to the needs of various long-life and maintenance-free industrial equipment. Similar technologies can be referred to the Chinese utility model patent CN212721279U. However, it is prone to poor axial connection reliability between its end cover and the resolver stator assembly in high and low temperature environments, reducing the accuracy, and its internal structure is complex and not conducive to miniaturization. Therefore, it needs to be improved. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a miniature resolver transmitter, which adopts the wave-shaped structure of the washer to ensure the connection between the end cover and the resolver stator assembly in high and low temperature environments, without change in resolver accuracy, and adopts an integrated resolver installation, which is conducive to miniaturization.

[0004] To achieve the purpose of the utility model, the first technical solution provided by the utility model is: a miniature resolver transmitter, which includes a housing with a housing cavity, an end cover connected and cooperated with the housing for shielding one end of the housing cavity and having an end cover bearing chamber, a resolver stator-rotor assembly at least partially received in the housing cavity, and a washer disposed between the end cover and the resolver stator-rotor assembly, wherein the washer has at least one wave crest portion or wave trough portion along the circumferential direction.

[0005] On the basis of the above technical solution, the following subsidiary technical solutions are further included:

[0006] The washer includes an annular body, a washer middle hole disposed in the annular body, and a washer wire hole disposed on the annular body, wherein the annular body has the wave crest portion or wave trough portion.

[0007] The resolver stator-rotor assembly includes a resolver rotor with a hollow interior, a resolver stator located outside the resolver rotor, a rotating shaft located at the center of the resolver rotor and capable of driving the resolver rotor to rotate, an end cover bearing sleeved at one end of the rotating shaft and received in the end cover bearing chamber, a rotor bearing sleeved at the other end of the rotating shaft, and an oil seal member disposed adjacent to the rotor bearing in the axial direction.

[0008] The end cover includes an end cover shaft hole disposed at the center and an end cover wire passing hole disposed adjacent to the end cover shaft hole.

[0009] It further includes a wire electrically connected to the resolver stator, wherein the resolver stator is provided with a stator wire hole connected to one end of the wire, and the wire sequentially passes through the washer wire hole and the end cover wire passing hole.

[0010] The washer has two crest portions and two trough portions along the circumferential direction, and one of the crest portions is adjacent to both of the two trough portions.

[0011] The washer has four crest portions and four trough portions along the circumferential direction, and one of the crest portions is adjacent to two of the trough portions.

[0012] The second technical solution provided by the present utility model: A micro resolver transmitter, which includes a housing with a housing cavity, an end cover connected and cooperated with the housing for shielding one end of the housing cavity and having an end cover bearing chamber, a resolver stator-rotor assembly at least partially received in the housing cavity, and a washer disposed between the end cover and the resolver stator-rotor assembly, wherein the resolver stator-rotor assembly includes a resolver rotor with a hollow interior, a resolver stator located outside the resolver rotor, and a rotating shaft located at the center of the resolver rotor and capable of driving the resolver rotor to rotate; wherein the washer includes an annular body and a washer through hole disposed in the annular body, and there are at least two points on the annular body in the circumferential direction, and the distances between the two points and the resolver stator in the direction along the rotating shaft are different.

[0013] The washer includes a washer wire hole disposed on the annular body, wherein the annular body has a crest portion and a trough portion, and one of the points is located at the crest portion and the other point is located at the trough portion.

[0014] The resolver stator-rotor assembly further includes an end cover bearing sleeved on one end of the rotating shaft and received in the end cover bearing chamber, a rotor bearing sleeved on the other end of the rotating shaft, and an oil seal member disposed adjacent to the rotor bearing in the axial direction, and the end cover includes an end cover shaft hole disposed at the center and an end cover wire through hole disposed adjacent to the end cover shaft hole.

[0015] Compared with the prior art, the present utility model has the following positive effects: By adopting the circumferential wave-shaped structure of the washer, it ensures the connection between the end cover and the resolver stator assembly in high and low temperature environments, and the resolver accuracy remains unchanged. Moreover, by adopting an integrated resolver installation, it is beneficial for miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Is a perspective view of the present utility model;

[0018] Figure 2A cross-sectional view of the present utility model;

[0019] Figure 3 A perspective view of the washer in the present utility model;

[0020] Figure 4 Another perspective view of the washer in the present utility model;

[0021] Figure 5 The front view of the washer in the present utility model;

[0022] Figure 6 The side view of the washer in the present utility model;

[0023] Figure 7 The exploded view of the present utility model. Detailed implementation manners

[0024] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] The following further describes in detail the specific implementation manners of the present utility model with reference to the drawings.

[0027] Embodiment: As Figures 1-7As shown, the present utility model discloses a first embodiment of a micro resolver transmitter, which includes a housing 100 having a housing cavity 120, an end cap 200 connected and cooperated with the housing 100 for shielding one end of the housing cavity 120 and having an end cap bearing chamber 220, a resolver stator-rotor assembly 300 at least partially received in the housing cavity 120, and a washer 400 disposed between the end cap 200 and the resolver stator-rotor assembly 300, wherein the washer 400 has at least one peak portion 402 or valley portion 404 along the circumferential direction.

[0028] The housing 100 is made of metal or plastic material, which is hollow inside and surrounds the periphery of the housing cavity 120, and one end of the housing cavity 120 is closed by the housing 100 while the other end is open.

[0029] The end cap 200 is used to close the open end of the housing cavity 120 and is connected to the housing 100 by screws. The end cap 200 includes an end cap shaft hole 240 provided at the center and an end cap wire passing hole 260 disposed adjacent to the end cap shaft hole 240.

[0030] The resolver stator-rotor assembly 300 includes a resolver rotor 320 located at the center and hollow inside, a resolver stator 340 located outside the resolver rotor 320, a rotating shaft 360 located at the center of the resolver rotor 320 and capable of driving the resolver rotor 320 to rotate, an end cap bearing 380 sleeved on one end of the rotating shaft 360 and received in the end cap bearing chamber 220, a rotor bearing 382 sleeved on the other end of the rotating shaft 360, and an oil seal 390 disposed adjacent to the rotor bearing 382 in the axial direction. Both ends of the rotating shaft 360 pass through the resolver rotor 320 and the housing cavity 120 and extend beyond both ends of the housing 100.

[0031] The washer 400 includes an annular body 410, a washer central hole 420 provided in the annular body 410, and a washer wire passing hole 440 provided on the annular body 410, wherein the annular body 410 has a peak portion 402 or a valley portion 404. The washer 400 has two peak portions 402 and two valley portions 404 along the circumferential direction, and one peak portion 402 is adjacent to both valley portions 404. The washer 400 has four peak portions 402 and four valley portions 404 along the circumferential direction, and one peak portion 402 is adjacent to two of the valley portions 404. The washer 400 ensures that the resolver stator is more secure up and down and can also play a role in preventing rotation.

[0032] This embodiment further includes a wire 500 electrically connected to the resolver stator 340, wherein the resolver stator is provided with a stator wire passing hole 342 connected to one end of the wire 500, and the wire 500 sequentially passes through the washer wire passing hole 440 and the end cap wire passing hole 260.

[0033] Based on the first embodiment, the present utility model discloses a second embodiment of a miniature resolver transmitter, which includes a housing 100 having a housing cavity 120, a end cap 200 connected and cooperated with the housing 100 for shielding one end of the housing cavity 120 and having an end cap bearing chamber 220, a resolver stator-rotor assembly 300 at least partially received in the housing cavity 120, and a washer 400 disposed between the end cap 200 and the resolver stator-rotor assembly 300. The resolver stator-rotor assembly 300 includes a resolver rotor 320 with a hollow interior, a resolver stator 340 located outside the resolver rotor 320, and a rotating shaft 360 located at the center of the resolver rotor 320 and capable of driving the resolver rotor 320 to rotate. The washer 400 includes an annular body 410 and a washer central hole 420 disposed within the annular body 410. At least two points exist in the circumferential direction of the annular body 410, and the distances between the two points and the resolver stator 340 are different in the direction along the rotating shaft 360. One point is located at the peak portion, and the other point is located at the trough portion.

[0034] The present utility model has the following positive effects: By adopting the circumferential wave-shaped structure of the washer, it ensures the connection between the end cap and the resolver stator assembly in high and low temperature environments, and the resolver accuracy remains unchanged. Moreover, the integrated resolver installation is beneficial for miniaturization.

[0035] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and do not limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A micro-rotor transmitter, characterized in that It includes: A housing (100) having a housing cavity (120), an end cover (200) connected to and matched with the housing (100) and used to shield one end of the housing cavity (120) and having an end cover bearing chamber (220), a rotary stator and rotor assembly (300) at least partially accommodated in the housing cavity (120), and a gasket (400) arranged between the end cover (200) and the rotary stator and rotor assembly (300), wherein the gasket (400) has at least one crest portion (402) or trough portion (404) along a circumferential direction.

2. The micro-rotor transmitter according to claim 1, characterized in that: The gasket (400) comprises an annular body (410), a gasket center hole (420) arranged in the annular body (410), and a gasket line hole (440) arranged on the annular body (410), wherein the annular body (410) has the wave crest portion (402) or the wave trough portion (404).

3. The micro-rotor transmitter according to claim 2, characterized in that: The resolver stator-rotor assembly (300) comprises a resolver rotor (320) with a hollow interior, a resolver stator (340) located outside the resolver rotor (320), a rotating shaft (360) located at the center of the resolver rotor (320) and capable of driving the resolver rotor (320) to rotate, an end cover bearing (380) sleeved on one end of the rotating shaft (360) and received by an end cover bearing chamber (220), a rotor bearing (382) sleeved on the other end of the rotating shaft (360), and an oil seal (390) arranged adjacent to the rotor bearing (382) in the axial direction.

4. The micro-rotor transmitter according to claim 3 is characterized in that: The end cover (200) comprises an end cover shaft hole (240) arranged at the center, and an end cover wire passing hole (260) arranged adjacent to the end cover shaft hole (240).

5. The micro-rotor transmitter according to claim 4 is characterized in that It also includes a wire (500) electrically connected to the resolver stator (340), wherein the resolver stator is provided with a stator wire hole (342) connected to one end of the wire (500), and the wire (500) passes through the washer wire hole (440) and the end cover wire hole (260) in sequence.

6. The micro-rotor transmitter according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The gasket (400) has two wave crests (402) and two wave troughs (404) along a circumferential direction, wherein the wave crest (402) and the two wave troughs (404) are arranged adjacent to each other.

7. The micro-rotor transmitter according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The gasket (400) has four wave crests (402) and four wave troughs (404) along the circumferential direction, wherein one wave crest (402) is arranged adjacent to two of the wave troughs (404).

8. A micro-rotor transmitter, characterized in that It includes: A housing (100) having a housing cavity (120), an end cover (200) connected to and matched with the housing (100) and used to shield one end of the housing cavity (120) and having an end cover bearing chamber (220), a resolver stator-rotor assembly (300) at least partially accommodated in the housing cavity (120), and a gasket (400) arranged between the end cover (200) and the resolver stator-rotor assembly (300), wherein the resolver stator-rotor assembly (300) comprises a resolver rotor (320) with a hollow interior, a position A rotary stator (340) is disposed outside the rotary rotor (320), and a rotating shaft (360) is located at the center of the rotary rotor (320) and can drive the rotary rotor (320) to rotate; wherein the gasket (400) comprises an annular body (410) and a gasket center hole (420) disposed in the annular body (410), and the annular body (410) has at least two points in a circumferential direction, wherein the two points have different spacings from the rotary stator (340) in a direction along the rotating shaft (360).

9. The micro-rotor transmitter according to claim 8, characterized in that: The gasket (400) comprises a gasket line hole (440) arranged on an annular body (410), wherein the annular body (410) has a crest portion (402) and a trough portion (404), and the one point is located at the crest portion (402) and the other point is located at the trough portion (404).

10. The micro-rotor transmitter according to claim 8, characterized in that: The rotating stator-rotor assembly (300) further comprises an end cover bearing (380) sleeved on one end of the rotating shaft (360) and received by the end cover bearing chamber (220), a rotor bearing (382) sleeved on the other end of the rotating shaft (360), and an oil seal (390) arranged adjacent to the rotor bearing (382) in the axial direction, and the end cover (200) comprises an end cover shaft hole (240) arranged at the center, and an end cover wire hole (260) arranged adjacent to the end cover shaft hole (240).

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