Single-shaft rotating mechanism for north seeker

Abstract

The utility model discloses a single-shaft rotating mechanism for a north seeker, which comprises a base, a motor and a rotating shaft, the base is provided with an accommodating cavity, the motor is arranged in the accommodating cavity, and a motor stator of the motor is fixedly connected with the base; one end of the rotating shaft is fixedly connected with the motor rotor, and the other end extends out of the base; a protruding ring protruding out of the base is arranged on the side, close to the rotating shaft and extending out of the base, of the base, and a first bearing is arranged between the protruding ring and the rotating shaft. A groove surrounding the rotating shaft is formed in one end, connected with the motor rotor, of the rotating shaft, a sleeve is arranged in the groove, and a plurality of second bearings are arranged in the distance between the sleeve and the inner wall of the groove in the axial direction of the rotating shaft; and the sleeve is fixedly connected with the base. According to the utility model, the loading capacity of the rotating assembly can be improved, and the stress uniformity of the rotating assembly is improved, so that the stability of the rotating assembly when the north seeker is in a long-time vertical state is ensured, and the equipment precision is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of north-finders, in particular to a single-axis rotation mechanism for a north-finder. Background Art

[0002] A high-precision north finder with a single-axis fiber optic gyroscope and a single-axis accelerometer as sensitive components can obtain the angle of the geographic North Pole completely independently without relying on external information. It mainly consists of a single gyroscope, a single accelerometer and a corresponding rotation mechanism. The gyroscope and accelerometer are installed on the north finder body, and encoders and rotation mechanisms are installed at both ends of the body. The control algorithm controls the rotation mechanism to drive the body to rotate in multiple positions, and then uses the output data of the gyroscope and accelerometer at each position to perform north-seeking solutions.

[0003] However, when the north finder is not in use, it is in a vertical state for a long time. The overall gravity of the north finder body is mainly transmitted to the rotating assembly by the rotating shaft of the rotating mechanism. In this way, the rotating assembly is subjected to pressure for a long time, which can easily cause uneven force on the various components of the rotating assembly and cause deformation of the components, thereby affecting the accuracy of the equipment. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problem that the rotating assembly of a north-finder is subjected to uneven pressure and easily deformed, resulting in affected accuracy of the north-finder. A single-axis rotating mechanism for a north-finder is provided, which can improve the pressure-bearing capacity of the rotating assembly and improve the uniformity of the force applied to the rotating assembly, thereby ensuring the stability of the rotating assembly of the north-finder when it is in a vertical state for a long time and avoiding affecting the accuracy of the equipment.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a single-axis rotation mechanism for a north-finder, comprising a base, a motor and a rotating shaft, the base having a housing, the motor being installed in the housing, the motor stator being fixedly connected to the base; one end of the rotating shaft being fixedly connected to the motor rotor, and the other end extending out of the base for connecting to a north-finder body; the characteristic being that the base is provided with a convex ring protruding from the base on a side close to the rotating shaft extending out of the base, the convex ring being located outside the rotating shaft and arranged coaxially with the rotating shaft; a first bearing being provided between the convex ring and the rotating shaft; a groove being provided around the rotating shaft at one end of the rotating shaft connected to the motor rotor, a sleeve being provided in the groove, the sleeve being arranged coaxially with the rotating shaft and having a spacing therebetween with an inner wall of the groove, and a plurality of second bearings being provided along the axial direction of the rotating shaft within the spacing between the sleeve and the inner wall of the groove; an end of the sleeve, facing away from the bottom of the groove, extending to the outside of an end of the motor, then bending and extending toward a side wall of the base, and being fixedly connected to the base.

[0006] Furthermore, the rotating shaft is a stepped shaft, and its end face extending out of the base forms a mounting plate for the north-finder body, and there is a distance between the mounting plate and the base, and the convex ring is located within the distance; the diameter of the rotating shaft gradually decreases from one end close to the mounting plate to the other end.

[0007] Furthermore, a connecting ring is respectively provided on the outer side of the motor stator and the inner side of the motor rotor. The connecting ring on the outer side of the motor stator is fixedly connected to the base, and the connecting ring on the inner side of the motor rotor is fixedly connected to a step surface of the rotating shaft.

[0008] Furthermore, the groove is located on a stepped surface close to one end of the rotating shaft located in the base, and an inner wall thereof is located on the same cylindrical surface as the one end of the rotating shaft located in the base.

[0009] Furthermore, first bearing pressure covers tightly attached to the first bearing are respectively provided at both ends of the first bearing; wherein, the first bearing pressure cover at one end of the first bearing close to the motor is sleeved on the rotating shaft and fixedly connected to the rotating shaft, and the first bearing pressure cover at the other end is sleeved on the convex ring and fixedly connected to the convex ring.

[0010] Furthermore, a second bearing cover is provided at one end of the rotating shaft located in the base. The second bearing cover is in close contact with the second bearing and presses the second bearing against the bottom of the groove.

[0011] Furthermore, the second bearing cover is fixedly connected to the end face of the rotating shaft by a clamping bolt, and the outer side of the second bearing cover extends to the outer side of the end of the rotating shaft and is pressed on the second bearing.

[0012] Furthermore, there are two second bearings, and the two second bearings are tightly attached to each other.

[0013] Compared with the existing technology, the present invention has the following advantages: simple structure, a first bearing is provided at one end (outer end) of the rotating shaft extending out of the base, and a second bearing is provided at one end (inner end) of the rotating shaft located inside the base, and the first bearing and the second bearing are both connected to the base, so that the force arm can be increased through the first bearing and the second bearing, and the force received by the rotating shaft can be transmitted to the base, thereby improving the bearing capacity of the rotating assembly and improving the uniformity of the force applied to the rotating assembly, ensuring the balance of the force applied to the axis, thereby ensuring the stability of the rotating assembly of the north finder in a vertical state for a long time, and avoiding affecting the accuracy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] In the figure: 1 - base, 2 - motor, 3 - rotating shaft, 4 - convex ring, 5 - first bearing, 6 - sleeve, 7 - second bearing, 8 - mounting plate, 9 - first bearing pressure cover, 10 - second bearing pressure cover, 11 - north finder body. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the figures, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and are not to be construed as indicating or implying relative importance. Furthermore, terms such as "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or overhanging, but rather may be slightly tilted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," and does not imply that the structure must be completely horizontal, but rather may be slightly tilted. In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0019] Example: See Figure 1A single-axis rotation mechanism for a north-finder includes a base 1, a motor 2, and a rotating shaft 3. The base 1 has a receiving cavity, and the motor 2 is installed in the receiving cavity, and the stator of the motor 2 is fixedly connected to the base 1. One end (inner end) of the rotating shaft 3 is fixedly connected to the rotor of the motor 2, and the other end (outer end) extends out of the base 1 for connection to the north-finder body 11. The rotating shaft 3 is a stepped shaft, and the end surface of the end extending out of the base 1 forms the mounting plate 8 of the north-finder body 11. The diameter of the rotating shaft 3 gradually decreases from one end close to the mounting plate 8 to the other end. A connecting ring is respectively provided on the outside of the stator of the motor 2 and the inside of the rotor of the motor 2. The connecting ring on the outside of the stator of the motor 2 is fixedly connected to the base 1, and the connecting ring on the inside of the rotor of the motor 2 is fixedly connected to a stepped surface of the rotating shaft 3.

[0020] A convex ring 4 protruding from the base 1 is provided on the side of the base 1 protruding from the base 1 close to the rotating shaft 3. The convex ring 4 is located outside the rotating shaft 3 and is arranged coaxially with the rotating shaft 3. There is a distance between the mounting plate 8 and the base 1, and the convex ring 4 is located within the distance. A first bearing 5 is provided between the convex ring 4 and the rotating shaft 3. First bearing pressure covers 9 that are tightly attached to the first bearing 5 are provided at both ends of the first bearing 5; the first bearing pressure cover 9 at one end of the first bearing 5 close to the motor 2 is sleeved on the rotating shaft 3 and fixedly connected to the rotating shaft 3, and the first bearing pressure cover 9 at the other end is sleeved on the convex ring 4 and fixedly connected to the convex ring 4; thereby ensuring the stability of the bearing position and preventing the bearing from moving.

[0021] A groove circumferentially extending around the rotating shaft 3 is provided at the end of the rotating shaft 3 connected to the rotor of the motor 2. The groove is located on a stepped surface near the end of the rotating shaft 3 located within the base 1, with its inner wall coexisting with the end of the rotating shaft 3 located within the base 1. A sleeve 6 is positioned within the groove, coaxial with the rotating shaft 3 and spaced apart from the inner wall of the groove. Within the spacing between the sleeve 6 and the inner wall of the groove, several second bearings 7 are positioned axially along the rotating shaft 3. In a specific embodiment, two second bearings 7 are provided, each tightly abutting against the other, effectively supporting the inner end of the rotating shaft 3. A second bearing cover 10 is provided at the end of the rotating shaft 3 located within the base 1. The second bearing cover 10 tightly abuts against the second bearing 7 and presses the second bearing 7 against the bottom of the groove. In one embodiment, two second bearing covers 7 are provided, overlapping each other and pressing against the inner and outer rings of the second bearing 7, respectively. During operation, the second bearing cap 7 is fixedly connected to the end face of the rotating shaft 3 via a compression bolt. Its outer side extends to the outside of the end of the rotating shaft 3 and presses against the second bearing 7, thereby ensuring the stability of the bearing position and preventing bearing movement. The sleeve 6, with its end facing away from the bottom of the groove, extends to the outside of the end of the motor 2, then bends and extends toward the side wall of the base 1, where it is fixedly connected to the base 1.

[0022] In this solution, a first bearing 5 is provided at the end (outer end) of the rotating shaft 3 extending from the base 1, and a second bearing 7 is provided at the end (inner end) of the rotating shaft 3 located inside the base 1. The first bearing 5 and the second bearing 7 are both connected to the base 1, so that the force arm can be increased through the first bearing 5 and the second bearing 7, and the force received by the rotating shaft 3 can be transmitted to the base 1, thereby improving the bearing capacity of the rotating assembly and improving the uniformity of the force applied to the rotating assembly, ensuring the balance of the shaft force, thereby ensuring the stability of the rotating assembly of the north finder in a vertical state for a long time and avoiding affecting the accuracy of the equipment.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A single-axis rotation mechanism for a north-finder, comprising a base, a motor, and a rotating shaft. The base has a housing, the motor is mounted within the housing, and the motor stator is fixedly connected to the base. One end of the rotating shaft is fixedly connected to the motor rotor, and the other end extends out of the base for connection to the north-finder body. The mechanism is characterized by: The base is provided with a convex ring protruding from the base on the side of the base close to the rotating shaft extending out of the base, and the convex ring is located on the outside of the rotating shaft and is arranged coaxially with the rotating shaft; a first bearing is provided between the convex ring and the rotating shaft; a groove is provided around the rotating shaft at one end of the rotating shaft connected to the motor rotor, and a sleeve is provided in the groove, which is coaxial with the rotating shaft and has a spacing with the inner wall of the groove, and several second bearings are provided along the axial direction of the rotating shaft within the spacing between the sleeve and the inner wall of the groove; the end of the sleeve away from the bottom of the groove extends to the outside of the motor end, then bends and extends toward the side wall of the base, and is fixedly connected to the base.

2. The single-axis rotation mechanism for a north finder according to claim 1, characterized in that: The rotating shaft is a stepped shaft, and its end surface extending out of the base forms a mounting plate for the north-finder body. There is a distance between the mounting plate and the base, and the convex ring is located within the distance. The diameter of the rotating shaft gradually decreases from one end close to the mounting plate to the other end.

3. The single-axis rotation mechanism for a north finder according to claim 2, characterized in that: A connecting ring is respectively provided on the outer side of the motor stator and the inner side of the motor rotor. The connecting ring on the outer side of the motor stator is fixedly connected to the base, and the connecting ring on the inner side of the motor rotor is fixedly connected to a step surface of the rotating shaft.

4. The single-axis rotation mechanism for a north finder according to claim 2, characterized in that: The groove is located on the step surface of the rotating shaft close to the end thereof located in the base, and the inner wall of the groove and the end of the rotating shaft located in the base are located on the same cylindrical surface.

5. The single-axis rotation mechanism for a north finder according to claim 1, characterized in that: A first bearing pressure cover tightly attached to the first bearing is provided at both ends of the first bearing; wherein, the first bearing pressure cover at one end of the first bearing close to the motor is sleeved on the rotating shaft and fixedly connected to the rotating shaft, and the first bearing pressure cover at the other end is sleeved on the convex ring and fixedly connected to the convex ring.

6. The single-axis rotation mechanism for a north finder according to claim 1, characterized in that: A second bearing pressure cover is provided at one end of the rotating shaft located in the base. The second bearing pressure cover is in close contact with the second bearing and presses the second bearing tightly against the bottom of the groove.

7. The single-axis rotation mechanism for a north finder according to claim 6, characterized in that: The second bearing cover is fixedly connected to the end face of the rotating shaft by a clamping bolt, and the outer side of the second bearing cover extends to the outer side of the end of the rotating shaft and is pressed on the second bearing.

8. The single-axis rotation mechanism for a north finder according to claim 1, characterized in that: There are two second bearings, and the two second bearings are tightly attached to each other.

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