Delination axis clutch mechanism of harmonic equatorial telescope

Abstract

The utility model discloses a declination shaft clutch mechanism of a harmonic equatorial telescope. The declination shaft clutch mechanism comprises a harmonic reducer output end. A lens cone seat connecting cylinder is fixedly mounted on the outer wall of the output end of the harmonic reducer, a second connecting screw is in threaded connection between the output end of the harmonic reducer and the lens cone seat connecting cylinder, a clutch hand wheel is fixedly connected to the outer wall of the lens cone seat connecting cylinder, and a DEC rotating shaft is fixedly connected to the side, away from the lens cone seat connecting cylinder, of the clutch hand wheel; a lens cone seat body is fixedly installed on the outer wall of the DEC rotating shaft, a first connecting screw is connected between the DEC rotating shaft and the lens cone seat body in a threaded mode, a lens cone seat connecting cylinder is rotationally connected with the DEC rotating shaft through a plane needle bearing and a deep groove ball bearing, and a traditional equatorial telescope balance adjusting mode cannot be directly achieved on a harmonic equatorial telescope. According to the design of the balance adjusting mechanism, even if the harmonic reducer does not rotate, balance adjustment of the rotating shaft can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of harmonic equatorial mounts, in particular to a declination axis clutch mechanism of a harmonic equatorial mount. Background Art

[0002] In recent years, a new equatorial mount has appeared on the market, the harmonic equatorial mount, which has risen due to the use of a harmonic reducer. The harmonic reducer is mainly composed of a steel wheel, a flexspline, a flexible bearing and an input shaft. Because the flexible bearing squeezes the flexspline onto the steel wheel and meshes tightly, there is no backlash, and at the same time, there is a large damping between the steel wheel and the flexspline, and a certain self-locking force is generated between the steel wheel and the flexspline, which cannot rotate. The flexspline and the steel wheel can only be prevented from rotating relative to each other by rotating the input shaft.

[0003] For the equatorial mount, when in use, not only the right ascension axis (RA axis) needs to be equipped with an additional counterweight to balance the imbalance of the right ascension axis caused by the installation of the lens barrel, but the declination axis (DEC axis) also needs to be adjusted by adjusting the installation position of the lens barrel. However, the declination axis (DEC axis) of the harmonic equatorial mount on the market cannot be rotated freely, so it is impossible to achieve the real lens barrel installation balance adjustment. Users often judge the position of the lens barrel based on their subjective feelings, which results in a large error. If it is used eccentrically for a long time, it will also affect the service life of the harmonic reducer.

[0004] Therefore, for the harmonic equatorial mount, it is necessary to design a declination axis clutch mechanism for the harmonic equatorial mount, which can be used for precise adjustment of the declination axis balance of the harmonic equatorial mount. The balance adjustment mechanism designed in this invention can freely rotate the declination axis once the clutch hand wheel is unscrewed, and the installation position of the lens barrel can be adjusted, so that precise balance adjustment can be easily achieved. Utility Model Content

[0005] The purpose of the utility model is to provide a declination axis clutch mechanism for a harmonic equatorial mount to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a declination axis clutch mechanism of a harmonic equatorial mount, comprising a harmonic reducer output end; a lens barrel seat connecting tube is fixedly installed on the outer wall of the harmonic reducer output end, a second connecting screw is threadedly connected between the harmonic reducer output end and the lens barrel seat connecting tube, a clutch handwheel is fixedly connected to the outer wall of the lens barrel seat connecting tube, a DEC rotating shaft is fixedly connected to the side of the clutch handwheel away from the lens barrel seat connecting tube, a lens barrel seat body is fixedly installed on the outer wall of the DEC rotating shaft, a first connecting screw is threadedly connected between the DEC rotating shaft and the lens barrel seat body, the lens barrel seat connecting tube and the DEC rotating shaft are rotatably connected via a plane needle roller bearing and a deep groove ball bearing, and a rotating shaft pressure ring is fixedly installed on the outer wall of the plane needle roller bearing and the deep groove ball bearing.

[0007] Preferably, the output end of the harmonic reducer is fixedly mounted to the lens barrel seat connecting tube via a second connecting screw, and the lens barrel seat connecting tube is fixedly connected to the DEC rotating shaft via a clutch handwheel.

[0008] Preferably, the DEC rotating shaft is fixedly connected to the lens barrel seat body by a first connecting screw, and the lens barrel seat body is fixedly installed to the lens barrel.

[0009] Preferably, the lens barrel seat connecting tube and the DEC rotating shaft are rotatably connected through a deep groove ball bearing and a plane needle roller bearing, and the rotating shaft pressure ring is fixedly installed with the deep groove ball bearing and the plane needle roller bearing, under their restriction, the DEC rotating shaft is prevented from axial movement.

[0010] Preferably, the clutch hand wheel is rotationally connected to the lens barrel seat connecting tube and the DEC shaft. When the clutch hand wheel is locked, the lens barrel fixedly mounted on the outer wall of the lens barrel seat body at the output end of the harmonic reducer rotates as a whole.

[0011] Preferably, when the lens barrel seat body moves, the lens barrel is aligned with the DEC shaft axis.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The harmonic reducer has a special structure. The output end (steel wheel or flexible wheel) cannot rotate freely and easily with the fixed end (flexible wheel or steel wheel). The load (such as the lens barrel) installed at the output end cannot rotate freely. It is difficult to accurately install the center of gravity of the lens barrel on the central axis of the rotating shaft at the output end. Therefore, the traditional equatorial mount balance adjustment method cannot be directly implemented on the harmonic equatorial mount and can only be achieved with the help of a balance adjustment mechanism. This mechanism design can achieve balance adjustment of the rotating shaft even if the harmonic reducer does not rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the front structure of the utility model.

[0016] Figure 3 It is a cross-sectional schematic diagram of AA of the utility model.

[0017] Figure 4 It is a cross-sectional schematic diagram of BB of the present utility model.

[0018] Figure 5 It is a three-dimensional schematic diagram of the DEC shaft of the utility model.

[0019] Figure 6 It is a top view schematic diagram of the DEC shaft of the utility model.

[0020] Figure 7 It is a three-dimensional schematic diagram of the lens barrel seat connecting tube of the utility model.

[0021] Figure 8 It is a side view schematic diagram of the connecting tube of the lens tube seat of the utility model.

[0022] In the figure: 1. Output end of harmonic reducer; 2. Connecting tube of lens barrel seat; 3. Plane needle roller bearing; 4. Deep groove ball bearing; 5. DEC shaft; 6. Clutch hand wheel; 7. Lens barrel seat body; 8. First connecting screw; 9. Second connecting screw; 10. Shaft pressure ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] A preferred embodiment of the declination axis clutch mechanism of the harmonic equatorial mount provided by the utility model is as follows: Figures 1 to 8As shown: a declination axis clutch mechanism of a harmonic equatorial mount, comprising a harmonic reducer output end 1; a lens barrel seat connecting tube 2 is fixedly installed on the outer wall of the harmonic reducer output end 1, a second connecting screw 9 is threadedly connected between the harmonic reducer output end 1 and the lens barrel seat connecting tube 2, a clutch handwheel 6 is fixedly connected to the outer wall of the lens barrel seat connecting tube 2, a DEC rotating shaft 5 is fixedly connected to the side of the clutch handwheel 6 away from the lens barrel seat connecting tube 2, a lens barrel seat body 7 is fixedly installed on the outer wall of the DEC rotating shaft 5, a first connecting screw 8 is threadedly connected between the DEC rotating shaft 5 and the lens barrel seat body 7, the lens barrel seat connecting tube 2 and the DEC rotating shaft 5 are rotatably connected through a plane needle roller bearing 3 and a deep groove ball bearing 4, and a rotating shaft pressing ring 10 is fixedly installed on the outer walls of the plane needle roller bearing 3 and the deep groove ball bearing 4.

[0028] The output end 1 of the harmonic reducer is fixedly installed with the lens barrel seat connecting tube 2 by a second connecting screw 9 , and the lens barrel seat connecting tube 2 is fixedly connected with the DEC rotating shaft 5 by a clutch hand wheel 6 .

[0029] The DEC rotating shaft 5 is fixedly connected to the lens barrel seat body 7 by a first connecting screw 8, and the lens barrel seat body 7 is fixedly installed to the lens barrel.

[0030] The lens barrel seat connecting tube 2 and the DEC shaft 5 are rotationally connected through the deep groove ball bearing 4 and the plane needle bearing 3, and the shaft pressure ring 10 is fixedly installed with the deep groove ball bearing 4 and the plane needle bearing 3. Under their restriction, the DEC shaft 5 is prevented from moving in the axial direction.

[0031] The clutch hand wheel 6 is rotationally connected to the lens barrel seat connecting tube 2 and the DEC shaft 5. When the clutch hand wheel 6 is locked, the lens barrel fixedly mounted on the outer wall of the lens barrel seat body 7 at the output end 1 of the harmonic reducer rotates as a whole.

[0032] When the lens barrel seat body 7 moves, the axis of the lens barrel and the DEC shaft 5 are aligned.

[0033] Working principle: The output end 1 of the harmonic reducer and the lens barrel seat connecting tube 2 are firmly fixed together with the second connecting screw, and the DEC shaft 5 and the lens barrel seat body 7 are firmly fixed by the first connecting screw. The load such as the lens barrel is installed on the lens barrel seat body 7, and the lens barrel seat connecting tube 2 and the DEC shaft 5 are rotatably connected through the deep groove ball bearing 4 and the plane needle bearing 3, and the bearing is fixed with the shaft pressing ring 10 to prevent the DEC shaft 5 from axial movement. The lens barrel seat connecting tube 2 and the DEC shaft 5 are fixedly connected with the clutch handwheel 6. When the clutch handwheel 6 is rotated out, the lens barrel seat connecting tube and the DEC shaft 5 can be easily rotated. At this time, by moving the load such as the lens barrel installed on the lens barrel seat, the center of gravity of the lens barrel is adjusted to the axis of the DEC shaft 5, so as to achieve precise balance adjustment of the DEC shaft 5. When the clutch handwheel 6 is locked, the output end 1 of the harmonic reducer and the load such as (lens barrel) are fixed as a whole for rotation.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0035] The above description is only an illustrative specific implementation method of the utility model, and is not intended to limit the scope of the utility model. Any equivalent changes and modifications made by any technician in this field without departing from the concept and principle of the utility model should fall within the scope of protection of the utility model. It should also be noted that the various components of the utility model are not limited to the above-mentioned overall application. The various technical features described in the specification of the utility model can be selected for use alone or in combination according to actual needs. Therefore, the utility model should naturally cover other combinations and specific applications related to the utility model points of this case.

Claims

1. A declination axis clutch mechanism of a harmonic equatorial mount, comprising a harmonic reducer output end (1); characterized in that: A lens barrel seat connecting tube (2) is fixedly mounted on the outer wall of the harmonic reducer output end (1), a second connecting screw (9) is threadedly connected between the harmonic reducer output end (1) and the lens barrel seat connecting tube (2), a clutch hand wheel (6) is fixedly connected to the outer wall of the lens barrel seat connecting tube (2), a DEC rotating shaft (5) is fixedly connected to the side of the clutch hand wheel (6) away from the lens barrel seat connecting tube (2), a lens barrel seat body (7) is fixedly mounted on the outer wall of the DEC rotating shaft (5), a first connecting screw (8) is threadedly connected between the DEC rotating shaft (5) and the lens barrel seat body (7), the lens barrel seat connecting tube (2) and the DEC rotating shaft (5) are rotatably connected via a plane needle roller bearing (3) and a deep groove ball bearing (4), and a rotating shaft pressing ring (10) is fixedly mounted on the outer walls of the plane needle roller bearing (3) and the deep groove ball bearing (4).

2. The declination axis clutch mechanism of a harmonic equatorial mount according to claim 1, characterized in that: The harmonic reducer output end (1) and the lens barrel seat connecting tube (2) are fixedly mounted via a second connecting screw (9), and the lens barrel seat connecting tube (2) and the DEC rotating shaft (5) are fixedly connected via a clutch hand wheel (6).

3. The declination axis clutch mechanism of a harmonic equatorial mount according to claim 1, characterized in that: The DEC rotating shaft (5) is fixedly connected to the lens barrel seat body (7) via a first connecting screw (8), and the lens barrel seat body (7) is fixedly mounted to the lens barrel.

4. The declination axis clutch mechanism of a harmonic equatorial mount according to claim 1, characterized in that: The lens barrel seat connecting tube (2) and the DEC rotating shaft (5) are rotatably connected via a deep groove ball bearing (4) and a plane needle bearing (3), and the rotating shaft pressing ring (10) is fixedly mounted on the deep groove ball bearing (4) and the plane needle bearing (3), and under the restriction of the deep groove ball bearing (4) and the plane needle bearing (3), the DEC rotating shaft (5) is prevented from axial movement.

5. The declination axis clutch mechanism of a harmonic equatorial mount according to claim 1, characterized in that: The clutch hand wheel (6) is rotationally connected to the lens barrel seat connecting tube (2) and the DEC rotating shaft (5); when the clutch hand wheel (6) is locked, the lens barrel fixedly mounted at the output end (1) of the harmonic reducer and the outer wall of the lens barrel seat body (7) rotates as a whole.

6. The declination axis clutch mechanism of a harmonic equatorial mount according to claim 1, characterized in that: When the lens barrel moves on the lens barrel seat body (7), the center of gravity of the lens barrel is aligned with the axis of the DEC rotating shaft (5).

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