Hybrid speed reduction transmission equatorial telescope based on crossed roller bearing

Abstract

The invention relates to a hybrid speed reduction transmission equatorial telescope based on a crossed roller bearing. The equatorial telescope comprises a shell, a right ascension axis hybrid speed reduction transmission assembly, a declination axis speed reduction transmission assembly, the crossed roller bearing, a laser beam parallelism adjusting mechanism and a base. The right ascension shaft mixed speed reduction transmission assembly comprises a right ascension shaft motor, a right ascension first-stage speed reducer and a right ascension second-stage speed reducer, the right ascension first-stage speed reducer is a harmonic speed reducer, and the right ascension second-stage speed reducer is a worm and gear transmission pair; the declination axis speed reduction transmission assembly comprises a declination axis motor and a declination axis speed reducer; an outer ring of the crossed roller bearing is fixed on the rear shell, one end face of an inner ring is fixed with the output end of the right ascension shaft mixed speed reduction transmission assembly, and the other end face of the inner ring is fixed with the right ascension shaft output seat; and the declination shaft speed reduction transmission assembly is fixed on the right ascension shaft output seat. The equatorial telescope has the advantages of being high in degree of freedom, small in size, light in weight and high in bearing capacity, and the equatorial telescope is high in reduction ratio, stable in tracking, high in tracking precision and low in power consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of astronomical observation instruments, and particularly relates to a hybrid reduction transmission equatorial mount based on cross-roller bearings. BACKGROUND

[0002] The equatorial mount is a core component of an astronomical observation system, mainly composed of an equatorial axis, an altitude axis and a base, and is used for realizing long-time accurate observation by tracking the apparent motion of celestial bodies on the celestial sphere. The equatorial axis of the equatorial mount runs at a very low speed equal to the rotation speed of the earth when tracking celestial bodies. Therefore, the input rotation speed of the driving motor of the equatorial axis of the equatorial mount generally needs to be reduced to a very low speed through a high reduction ratio or the driving motor needs to be kept at a very low speed to run at a very high accuracy. The altitude axis is mainly used to point to targets at different latitudes in the celestial coordinate system.

[0003] However, the traditional equatorial mount usually adopts a worm gear or a combination of a gear train reduction transmission and a worm gear as the main reduction scheme, which leads to a complex structure, a large volume, a heavy weight, a low output torque under the same volume due to the joint influence of the transmission efficiency and the low reduction ratio (generally 300:1 to 900:1), a need for heavy balance during use, a low degree of freedom in overall structural design and integration, a large backlash of the altitude axis, inaccuracy in pointing, a slow response time in the star guiding scene, and the like. In addition, the equatorial axis of the traditional equatorial mount is usually fixed by using several deep groove ball bearings or a combination of deep groove ball bearings and tapered roller bearings. Due to the installation precision and bearing play, the coaxiality deviation of the shaft system is easily caused, which further enlarges the polar axis error and reduces the tracking accuracy. At the same time, the axial bearing capacity is also limited.

[0004] Although the rapid development of harmonic equatorial telescope in recent years has solved the problems of the traditional worm equatorial telescope, such as large size, heavy weight, low transmission efficiency, small output torque, large backlash of the declination shaft, slow response time in the scene of inaccurate guiding star field, the reduction scheme of the harmonic equatorial telescope usually adopts single-stage harmonic reducer or wheel system reducer combined with harmonic reducer, and the reduction ratio is still limited by the volume (generally 100:1 to 500:1). In addition, the harmonic reducer needs to consider the rigidity of the flexspline diameter and the wave generator in the design, which is difficult to achieve high-resolution tracking and low-power operation in miniaturization design. Moreover, the equatorial telescope needs to track celestial bodies for a long time, and the process may be affected by slight external vibrations (such as wind blowing, equipment fine adjustment, etc.). Since the harmonic reducer relies on the elastic deformation of the flexspline to operate normally, the slight rebound of the flexspline may cause "creep" in the application of the equatorial telescope, and the long-term repeated deformation may also cause the flexspline material to be more prone to fatigue, resulting in a decrease in accuracy with the accumulation of use time and affecting the stability and accuracy of tracking. At the same time, under the condition of ultra-low speed operation, the flexspline may appear "stuttering" phenomenon, causing unstable torque transmission, and the elastic hysteresis of the flexspline may also cause instantaneous transmission ratio fluctuation, thereby affecting the smoothness of tracking.

[0005] In addition, the polar axis calibration step before the use of the equatorial telescope is particularly important when astronomical observation is performed. The polar axis error of the equatorial telescope should be controlled within 5 angular minutes to minimize the impact of tracking accuracy caused by the polar axis error during the compensation of the earth's rotation and the tracking of celestial bodies. The polar axis calibration methods of the above two types of equatorial telescopes usually use optical polar axis mirrors or lasers without parallelism adjustment mechanisms to perform the polar axis calibration step before the use of the equatorial telescope. Both of these two methods have many inconveniences in use. When calibrating the polar axis, the user needs to observe the relative position of the star point in the field of view of the optical polar axis mirror and the scale in the polar axis mirror by attaching or squatting down. The calibration time of the polar axis is generally 3-5 minutes. Due to the limited body posture of the user, it is difficult to observe the star point position in the optical polar axis mirror and adjust the latitude and azimuth adjustment mechanisms. If the user wears glasses, it will be more difficult. Although the laser beam of the laser without parallelism adjustment mechanism is more intuitive and convenient to use when calibrating the polar axis, the accuracy of the polar axis calibration is greatly limited due to the lack of reasonable guarantee of the parallelism between the laser beam and the equatorial telescope. The accuracy of the polar axis calibration is greatly limited due to the lack of reasonable guarantee of the parallelism between the laser beam and the equatorial telescope. The error of this method for calibrating the polar axis is extremely dependent on the installation method of the laser and the coaxiality of the laser beam and the laser itself (usually the coaxiality error is within 0.5-2°), which is far from meeting the accuracy requirements of the polar axis error for high-precision tracking of the equatorial telescope. SUMMARY

[0006] To solve the problems in the prior art, the present application aims to provide a hybrid reduction transmission equatorial telescope based on cross-roller bearings, which has high design freedom, small volume, light weight, high load capacity, high reduction ratio, stable tracking, high tracking precision, low power consumption, intuitive, accurate and convenient polar axis calibration, and meets the needs of modern astronomical observation for portability, ease of use and high precision.

[0007] To achieve the above-mentioned application purposes, the present application provides a hybrid reduction transmission equatorial telescope based on cross-roller bearings, which comprises a housing, a right ascension shaft hybrid reduction transmission assembly, an declination shaft reduction transmission assembly and a base, the output end of the right ascension shaft hybrid reduction transmission assembly is perpendicular to the output end of the declination shaft reduction transmission assembly, and further comprises cross-roller bearings and a laser beam parallelism adjusting mechanism.

[0008] The housing comprises a rear housing for mounting the right ascension shaft hybrid reduction transmission assembly and a front housing for mounting the declination shaft reduction transmission assembly.

[0009] The right ascension shaft hybrid reduction transmission assembly comprises a right ascension shaft motor, a right ascension primary reducer and a right ascension secondary reducer, the right ascension primary reducer is a harmonic reducer, and the right ascension secondary reducer is a worm and gear transmission pair.

[0010] The declination shaft reduction transmission assembly comprises a declination shaft motor and a declination shaft reducer.

[0011] The outer ring of the cross-roller bearing is fixed on the rear housing, one end face of the inner ring is fixed with the output end of the right ascension shaft hybrid reduction transmission assembly, and the other end face of the inner ring is fixed with a right ascension shaft output seat, and the declination shaft reduction transmission assembly is fixed on the right ascension shaft output seat.

[0012] According to one technical solution of the present application, the base comprises a latitude and azimuth adjusting mechanism for realizing azimuth and latitude adjustment of the whole hybrid reduction transmission equatorial telescope and aligning the equatorial telescope right ascension shaft with the earth rotation axis.

[0013] According to one technical solution of the present application, the latitude adjusting mechanism comprises:

[0014] a first bottom plate, a left side plate and a right side plate which are vertically fixed on the first bottom plate;

[0015] a support seat for adjusting latitude, which is arranged between the left side plate and the right side plate, and is provided with two blind holes on the two side faces corresponding to the left side plate and the right side plate, and the center axes of the two blind holes are on a straight line;

[0016] two first hand screws which are oppositely arranged, respectively pass through the through holes of the left side plate and the right side plate, and extend into the corresponding blind holes.

[0017] A guide plate is rotatably arranged between the left side plate and the right side plate.

[0018] A second hand screw is arranged perpendicularly to a threaded hole passing through the guide plate and extending into the rotating short shaft; the support base is arranged with a U-shaped groove near one side of the first bottom plate, two vertical parts of the U-shaped groove are parallel to the left side plate and the right side plate, and the rotating short shaft is arranged perpendicularly to the vertical parts of the U-shaped groove and in the U-shaped groove.

[0019] According to one technical solution of the present application, the azimuth angle adjusting mechanism comprises:

[0020] A second bottom plate is arranged below the first bottom plate, the first bottom plate is arranged with a plurality of first arc-shaped grooves, and the second bottom plate is arranged with a plurality of second arc-shaped grooves.

[0021] A first limiting rod is fixed from bottom to top through the second arc-shaped grooves and the first bottom plate;

[0022] A second limiting rod passing through the first arc-shaped grooves from top to bottom is arranged with an adjusting handle for locking the first bottom plate and the second bottom plate;

[0023] An azimuth angle adjusting column is fixedly arranged on the second bottom plate.

[0024] Two oppositely arranged third hand screws respectively pass through threaded holes of the left side plate and the right side plate and abut against the azimuth angle adjusting column.

[0025] According to one technical solution of the present application, the right ascension shaft hybrid reduction transmission assembly is fixed through a connecting seat and the support base.

[0026] The right ascension shaft hybrid reduction transmission assembly is arranged in the rear shell, and the rear shell is arranged with a first trapezoidal boss.

[0027] The connecting seat comprises a detachable first L-shaped part and a second L-shaped part, and the first L-shaped part and the second L-shaped part are combined to form a first trapezoidal groove matched with the first trapezoidal boss.

[0028] The first L-shaped part and the second L-shaped part are connected in a mutual embedding mode and locked through bolts.

[0029] According to one technical solution of the present application, the right ascension shaft hybrid reduction transmission assembly comprises:

[0030] The right ascension shaft motor is mounted in the rear shell through a fixed support, and the right ascension shaft motor is connected with the right ascension primary reducer through a first adapter flange.

[0031] The output shaft of the right ascension first-stage reducer is connected with the worm of the right ascension second-stage reducer through a power transmission device, and the worm of the right ascension second-stage reducer is parallel to the output end of the right ascension shaft motor;

[0032] The worm wheel of the right ascension second-stage reducer is fixed with the inner ring of the cross roller bearing, and the plane of the worm wheel of the right ascension second-stage reducer is arranged opposite to one side surface of the right ascension shaft motor.

[0033] According to one technical solution of the present application, the right ascension shaft output seat is provided with a second trapezoidal groove matched with the second trapezoidal boss of the front shell body;

[0034] The second trapezoidal groove is provided with a clamping block and an adjusting bolt, the clamping block is provided with a through hole, and the adjusting bolt passes through the through hole of the clamping block and is matched and connected with the threaded hole of the second trapezoidal boss;

[0035] One end of the second trapezoidal boss is provided with a limiting boss, and the limiting boss is limited by the right ascension shaft output seat.

[0036] According to one technical solution of the present application, the right ascension shaft motor is fixed in the front shell body through a fixed support, and the right ascension shaft motor is connected with the right ascension shaft reducer through a second adapter flange;

[0037] The right ascension shaft reducer is a harmonic reducer, and the output end of the right ascension shaft reducer is provided with a right ascension shaft output clamp.

[0038] According to one technical solution of the present application, the laser beam parallelism adjusting mechanism comprises a laser, an elastic fixing ring and a laser beam parallelism adjusting block.

[0039] The laser beam parallelism adjusting block is arranged in the rear shell body and close to the side wall of the rear shell body, and the laser is fixed in the cavity of the laser beam parallelism adjusting block through the elastic fixing ring.

[0040] The elastic fixing ring, the laser beam parallelism adjusting block and the end face of the rear shell body corresponding to the light beam emitting end are provided with through holes corresponding to the position of the light beam emitting end of the laser.

[0041] According to one technical solution of the present application, the power transmission device comprises:

[0042] A first synchronous wheel is fixed on the output shaft of the right ascension first-stage reducer through a screw;

[0043] A second synchronous wheel is fixed on the worm of the right ascension second-stage reducer through a screw;

[0044] A tensioning wheel;

[0045] The first synchronous wheel and the second synchronous wheel are connected through a synchronous belt.

[0046] Compared with the prior art, the hybrid reduction transmission equatorial mount based on the cross-roller bearing has the following remarkable technical effects:

[0047] The application adopts a hybrid two-stage reduction transmission scheme of "harmonic reducer + worm and gear", the first-stage harmonic reduction realizes low-backlash, high-precision, high-transmission efficiency, small size, high response speed, and primary reduction, and the second-stage worm and gear provides extremely high final reduction ratio (up to tens of thousands of one), stronger impact resistance, and excellent transmission smoothness, the combination fully gives play to the advantages of the two reduction mechanisms and avoids their respective shortcomings, and finally realizes the reduction ratio, theoretical tracking resolution, load capacity and power consumption performance under the same size, which far exceeds the existing equatorial mount, and greatly improves the imaging quality and portability of astronomical photography.

[0048] The application adopts a cross-roller bearing as the core support of the right ascension shaft, the cross-roller bearing internally adopts a cross-arranged structure of rollers, can simultaneously bear radial force, axial force and overturning moment, and has far better load capacity and rigidity than traditional angular contact bearings, deep groove ball bearings and tapered roller bearings, greatly simplifies the support structure of the right ascension shaft, eliminates the complex bearing seat, reduces the size and weight, and significantly improves the load capacity and torsional rigidity of the entire equatorial mount, greatly reduces the coaxiality deviation of the shaft system, and enables the equatorial mount to stably drive a heavier astronomical telescope device for tracking.

[0049] Due to the simplified structure of the cross-roller bearing and the highly integrated design of the hybrid reduction assembly, the overall structure of the equatorial mount is very compact and has high integration degree.

[0050] The application designs an integrated laser beam parallelism adjusting mechanism, through emitting a laser beam precisely parallel to the right ascension shaft, a user can intuitively align the laser beam to the north celestial pole (or the south celestial pole), thereby quickly and accurately completing the polar axis calibration work, and completely gets rid of the dependence on the polar axis mirror and computer analysis of the polar axis.

[0051] The harmonic reducer and the worm gear are both sealed in the equatorial mount shell, are well protected, and reduce the influence of environmental factors such as dust and moisture, the unique lubrication design also provides long-term stable and good lubrication conditions between the transmission components, and provides reliable support for long-term maintenance-free operation of the equipment. Meanwhile, the reasonable structure layout and heat dissipation design ensure that the heat generated by the motor and the circuit can be conducted and dissipated in time, effectively avoiding the precision decline or equipment damage caused by overheating of the components, thereby prolonging the service life of the whole machine. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0053] Figure 1 A first angle perspective view of a hybrid reduction drive equatorial mount based on cross-roller bearings according to the present application is shown (part of the cover plate of the rear shell is not shown);

[0054] Figure 2 A second angle perspective view of a hybrid reduction drive equatorial mount based on cross-roller bearings according to the present application is shown;

[0055] Figure 3 A first angle perspective view of a base of a hybrid reduction drive equatorial mount according to the present application is shown;

[0056] Figure 4 A second angle perspective view of a base of a hybrid reduction drive equatorial mount according to the present application is shown;

[0057] Figure 5 A third angle perspective view of a base of a hybrid reduction drive equatorial mount according to the present application is shown;

[0058] Figure 6 A fourth angle perspective view of a base of a hybrid reduction drive equatorial mount according to the present application is shown;

[0059] Figure 7 A perspective view of a rear shell of a hybrid reduction drive equatorial mount according to the present application is shown;

[0060] Figure 8 A first angle perspective view of a right ascension shaft hybrid reduction drive assembly of a hybrid reduction drive equatorial mount according to the present application is shown;

[0061] Figure 9A perspective view of a second angle of a right ascension shaft hybrid reduction drive assembly of a hybrid reduction drive equatorial telescope according to the present application is shown.

[0062] Figure 10 A perspective view of a front housing of a hybrid reduction drive equatorial telescope according to the present application is shown.

[0063] Figure 11 A perspective view of a declination shaft reduction drive assembly of a hybrid reduction drive equatorial telescope according to the present application is shown.

[0064] Figure 12 A partial perspective view of a first angle of a rear housing of a hybrid reduction drive equatorial telescope according to the present application is shown.

[0065] Figure 13 A partial perspective view of a second angle of a rear housing of a hybrid reduction drive equatorial telescope according to the present application is shown.

[0066] Figure 14 A perspective view of a cross roller bearing of a hybrid reduction drive equatorial telescope according to the present application is shown.

[0067] wherein, Figures 1 to 14 The correspondence between reference signs and component names is as follows:

[0068] 1, housing; 2, right ascension shaft hybrid reduction drive assembly; 3, declination shaft reduction drive assembly; 4, base; 5, cross roller bearing; 6, laser beam parallelism adjustment mechanism; 7, power transmission device; 8, heavy hammer rod;

[0069] 101, rear housing; 102, front housing; 102a, limit boss;

[0070] 201, right ascension shaft motor; 202, right ascension first stage reducer; 203, right ascension second stage reducer; 204, right ascension shaft output seat; 205, first adapter flange; 203a, worm; 203b, worm wheel; 204a, clamp block; 204b, adjustment bolt;

[0071] 301, declination shaft motor; 302, declination shaft reducer; 303, second adapter flange; 304, declination shaft output clamp;

[0072] 401, latitude adjustment mechanism; 402, azimuth angle adjustment mechanism; 401a, first bottom plate; 401b, left side plate; 401c, right side plate; 401d, support seat; 401e, first hand screw; 401f, guide plate; 401g, second hand screw; 401h, rotating short shaft; 401j, U-shaped groove; 401k, first arc-shaped groove; 401m, first L-shaped part; 401n, second L-shaped part; 402a, second bottom plate; 402b, second arc-shaped groove; 402c, first limiting rod; 402d, second limiting rod; 402e, adjusting handle; 402f, azimuth angle adjusting column; 402g, third hand screw;

[0073] 601, laser; 602, elastic fixing ring; 603, laser beam parallelism adjusting block;

[0074] 701, first synchronous wheel; 702, second synchronous wheel; 703, synchronous belt; 704, tensioning wheel. DETAILED DESCRIPTION

[0075] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0076] In the description of the present application, it should be understood that the terms "outer ring", "inner ring", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "vertical", "horizontal", "parallel", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "end face", "side", "input end", "output end", "between", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0077] Furthermore, the terms "first-level," "second-level," "first," and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first-level," "second-level," "first," or "second" may explicitly or implicitly include one, one, or multiple levels of that feature. Further, in the description of this invention, "hybrid reduction transmission" means combining two or more different types of transmission methods, including features embodied in some transmission components of this invention as well as features embodied in the overall transmission scheme of this invention, unless otherwise explicitly specified.

[0078] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

[0079] like Figures 1 to 14 As shown, the equatorial mount based on a cross roller bearing according to an exemplary embodiment of the present invention includes a housing 1, a right ascension axis hybrid reduction transmission assembly 2, a declination axis reduction transmission assembly 3, and a base 4. The output end of the right ascension axis hybrid reduction transmission assembly 2 and the output end of the declination axis reduction transmission assembly 3 are perpendicular to each other, ensuring that the movement of the right ascension axis (to compensate for the Earth's rotation) and the declination axis (to adjust the declination direction of the equatorial mount) do not interfere with each other. The base 4 supports the main body of the equatorial mount. For the right ascension axis hybrid reduction drive assembly 2, the right ascension axis must be parallel to the Earth's rotation axis (aligned with the North Celestial Pole via the laser beam, and with the South Celestial Pole in the Southern Hemisphere). It is driven by a motor to rotate in the opposite direction to the Earth's rotation at the same angular velocity (the Earth's rotation is the cause of the apparent motion of celestial bodies appearing to rise in the east and set in the west; the reverse rotation of the right ascension axis cancels out this motion). This prevents celestial bodies in the telescope's field of view from "running away" due to the Earth's rotation, thus enabling long-term stable tracking of the celestial body. For the declination axis reduction drive assembly 3, the declination axis is perpendicular to the right ascension axis and is used to adjust the telescope's angle in the north-south direction (corresponding to the declination coordinates in the celestial coordinate system). By rotating the declination axis, celestial bodies at different declination positions can be targeted.

[0080] The cross-roller bearing-based hybrid speed reduction transmission equatorial mount in the application further comprises a cross-roller bearing 5 and a laser beam parallelism adjusting mechanism 6; the laser beam parallelism adjusting mechanism 6 can adjust the laser beam emitted by the laser to be parallel to the equatorial mount right ascension shaft, thereby providing visual guidance for the position of the right ascension shaft in the polar axis calibration stage before use, and providing users with more accurate, intuitive and convenient polar axis calibration experience, and fully exerting the precision of the equatorial mount.

[0081] The shell 1 comprises a rear shell 101 for mounting the right ascension shaft hybrid speed reduction transmission assembly 2 and a front shell 102 for mounting the declination shaft speed reduction transmission assembly 3, the front shell 102 and the rear shell 101 can protect the core structure of the equatorial mount and serve as the structural support of the equatorial mount and the load; each surface of the shell 1 adopts a detachable two-piece mode, and meanwhile, the front shell 102 and the rear shell 101 are detachably connected through the right ascension shaft output seat 204, which is beneficial to the installation and maintenance of the internal components and also makes the equatorial mount have strong versatility in different application scenarios.

[0082] The right ascension shaft hybrid speed reduction transmission assembly 2 comprises a right ascension shaft motor 201, a right ascension primary reducer 202 and a right ascension secondary reducer 203, the right ascension primary reducer 202 is a harmonic reducer, the harmonic reducer has the characteristics of low backlash, high precision, high transmission efficiency, small size and high response speed, can preliminarily improve the tracking resolution and improve the motor output torque, and the right ascension secondary reducer 203 is a worm gear 203b and a worm 203a transmission pair, which provides the right ascension shaft with extremely high final reduction ratio (up to tens of thousands of one) and has extremely strong impact resistance and excellent transmission smoothness;

[0083] The transmission mode of the hybrid speed reduction transmission makes the equatorial mount fully exert the characteristics and advantages of different kinds of transmission modes under the condition of having the same volume or weight as the existing equatorial mount, provides the right ascension shaft with ultra-high reduction ratio of thousands of one to tens of thousands of one, thereby greatly improving the output torque and theoretical tracking resolution of the right ascension shaft, reducing the overall power consumption of the equatorial mount, improving the torque transmission stability of the right ascension shaft, and also improving the tracking accuracy and tracking smoothness of the equatorial mount, so that it can meet the demand of users for tracking accuracy under the application condition of not using a star guide and a counterweight for balancing, greatly simplifying the dependence on peripheral equipment. Meanwhile, the right ascension secondary reducer adopts a worm gear and worm transmission pair, which has a natural self-locking function under specific parameter design, can effectively lock the position when the motor is powered off, prevents the load from sliding down due to the reverse driving of the motor by its own gravity, and improves the safety of the equipment.

[0084] The declination shaft speed reduction transmission assembly 3 comprises a declination shaft motor 301 and a declination shaft reducer 302; the declination shaft adopts the mode of motor direct drive reducer, so that the equatorial mount can quickly respond to the frequent reversal correction of the declination shaft under the star guide condition, and can also obtain excellent image quality in the case of long-time exposure.

[0085] The outer ring of the cross-roller bearing 5 is fixed on the rear housing 101, one end surface of the inner ring is fixed with the output end of the right ascension shaft hybrid reduction transmission assembly 2, and the other end surface is fixed with the right ascension shaft output seat 204; the declination shaft reduction transmission assembly 3 is fixed on the right ascension shaft output seat 204.

[0086] The cross-roller bearing 5 is used to fix and rotate the right ascension shaft, which not only reduces the shafting coaxiality deviation of the right ascension shaft but also improves the carrying capacity of the right ascension shaft, simplifies the overall structure of the equatorial telescope, improves the design freedom of the overall structure of the equatorial telescope, reduces the volume of the equatorial telescope, and reduces the weight of the equatorial telescope, so that the equatorial telescope has better polar axis deviation control ability and is more convenient to carry during operation.

[0087] In addition, based on the basic structure of the present application, the right ascension primary reducer 202 and the right ascension secondary reducer 203 can also use other reducers, and this example is only one of the implementation examples.

[0088] In some embodiments of the present application, the base 4 includes a latitude adjustment mechanism 401 and an azimuth angle adjustment mechanism 402, which are used to adjust the latitude and azimuth angle of the hybrid reduction transmission equatorial telescope as a whole and align the right ascension shaft of the equatorial telescope with the earth rotation axis.

[0089] In some embodiments of the present application, the latitude adjustment mechanism 401 includes:

[0090] A first bottom plate 401a and left and right side plates 401b and 401c vertically fixed on the first bottom plate 401a, and the first bottom plate 401a, the left side plate 401b and the right side plate 401c are used as the basic support structure of the latitude adjustment mechanism 401;

[0091] A support seat 401d for adjusting latitude, which is arranged between the left side plate 401b and the right side plate 401c, and the two side surfaces of the support seat 401d corresponding to the left side plate 401b and the right side plate 401c are provided with two blind holes, and the center axes of the two blind holes are on a straight line;

[0092] Two first hand screws 401e arranged oppositely, respectively passing through the through holes of the left side plate 401b and the right side plate 401c and extending into the corresponding blind holes; the blind holes are non-through holes, and a abutting plate is formed between the two blind holes, and the two blind holes are provided with threads matched with the first hand screws 401e. After the latitude adjustment is completed, the two first hand screws 401e are screwed into and abut against the abutting plate, so that the support seat 401d can be locked and fixed, the backlash of the threaded connection and the gap between the components are eliminated, and the pointing stability of the support seat 401d is affected by the backlash and the gap.

[0093] The guide plate 401f is rotatably arranged between the left side plate 401b and the right side plate 401c;

[0094] The second hand screw 401g is perpendicular to the threaded hole passing through the guide plate 401f and extending into the rotating short shaft 401h; the support seat 401d is provided with a U-shaped groove 401J on one side close to the first bottom plate 401a, the two vertical parts of the U-shaped groove 401J are parallel to the left side plate 401b and the right side plate 401c, and the rotating short shaft 401h is perpendicular to the vertical parts of the U-shaped groove 401J and arranged in the U-shaped groove 401J.

[0095] When the latitude needs to be adjusted, the two first hand screws 401e are loosened so as to not abut against the abutting plate, at this time, the two blind holes corresponding to the left side plate 401b and the right side plate 401c serve as the rotating shaft of the support seat 401d; in the rotating process of the second hand screw 401g, the rotating short shaft 401h moves along the second hand screw 401g, and since there is rotation between the rotating short shaft 401h and the support seat 401d in the moving process, the rotating short shaft 401h is rotatably arranged in the U-shaped groove 401J; similarly, in the rotating process of the second hand screw 401g, the angle between the second hand screw 401g and the first bottom plate 401a also changes, and the rotation of the guide plate 401f between the left side plate 401b and the right side plate 401c can adapt to the change of the angle, so that the whole mechanism can normally operate. Therefore, when the second hand screw 401g rotates, the rotating short shaft 401h moves along the second hand screw 401g, so that the support seat 401d rotates around the rotating shaft, thereby realizing the adjustment of the latitude.

[0096] The latitude adjustment structure has the characteristics of high stability, and only one hand screw needs to be adjusted without complicated operation, and fine adjustment can be completed without disassembling parts, thereby solving the problems of large fine adjustment difficulty and poor precision of the existing equatorial mount, and providing precise latitude pointing guarantee for precise alignment of the right ascension shaft and the earth rotation axis.

[0097] All adjustment actions are completed through hand screws without the need of special tools, and the motion trajectories of the support seat 401d and the guide plate 401f are constrained by the structure in the adjustment process, so that over-adjustment or misplacement is avoided, the operation threshold is reduced, and the device is suitable for users with different experience levels.

[0098] In some embodiments of the present application, the azimuth angle adjustment mechanism 402 comprises:

[0099] The second bottom plate 402a is arranged below the first bottom plate 401a, the first bottom plate 401a is provided with a plurality of first arc-shaped grooves 401k, and the second bottom plate 402a is provided with a plurality of second arc-shaped grooves 402b;

[0100] The first limiting rod 402c is fixed to the first bottom plate 401a through the second arc-shaped slot 402b from bottom to top.

[0101] The second limiting rod 402d passing through the first arc-shaped slot 401k from top to bottom is provided with an adjusting handle 402e for locking the first bottom plate 401a and the second bottom plate 402a.

[0102] The azimuth angle adjusting column 402f is fixedly arranged on the second bottom plate 402a.

[0103] The two third hand screws 402g arranged oppositely pass through the threaded holes of the left side plate 401b and the right side plate 401c respectively and abut against the azimuth angle adjusting column 402f.

[0104] The second bottom plate 402a is in the form of a disc as a whole and is provided with a gap for avoiding the third hand screw 402g; the first bottom plate 401a and the second bottom plate 402a are in size adaptation and are provided with avoiding gaps at the corresponding positions of the left side plate 401b, the right side plate 401c and the azimuth angle adjusting column 402f.

[0105] The first bottom plate 401a and the second bottom plate 402a are respectively provided with a plurality of first arc-shaped slots 401k and a plurality of second arc-shaped slots 402b; each first arc-shaped slot 401k is provided with a second limiting rod 402d and each second arc-shaped slot 402b is provided with a first limiting rod 402c. The plurality of first arc-shaped slots 401k and the plurality of second arc-shaped slots 402b are concentric; in general, the plurality of first arc-shaped slots 401k are symmetrically designed, for example, two first arc-shaped slots 401k are arranged and the two arc-shaped slots are symmetric to the center line of the left side plate 401b and the right side plate 401c; the plurality of second arc-shaped slots 402b are symmetrically designed in the same way. In addition, the arc degrees of the first arc-shaped slots 401k and the second arc-shaped slots 402b are basically the same, about 20°-40°; it can be understood that the plurality of first arc-shaped slots 401k and the plurality of second arc-shaped slots 402b are in misalignment. By the limiting action of the first limiting rod 402c and the second limiting rod 402d, the first bottom plate 401a and the second bottom plate 402a can be moved along the circumferential direction of the first arc-shaped slot 401k and the second arc-shaped slot 402b.

[0106] Specifically, two third hand screws 402g pass through the threaded holes of the left side plate 401b and the right side plate 401c respectively, and abut against the azimuth adjusting column 402f. Here, the threaded holes are not the same as the threaded holes used for the first hand screw 401e to pass through. The first hand screw 401e is located at the upper part of the left side plate 401b and the right side plate 401c, while the third hand screw 402g is located at the lower part of the left side plate 401b and the right side plate 401c. When the azimuth needs to be adjusted, first, all the second limiting rods 402d are loosened by using the adjusting handle 402e, and then one of the third hand screws 402g is loosened based on the direction of the azimuth adjustment required. Then, the other third hand screw 402g is rotated, so that the first bottom plate 401a rotates relative to the second bottom plate 402a. After the azimuth adjustment is completed, the third hand screw 402g that has been loosened is rotated again to abut against the azimuth adjusting column 402f, so as to be locked. Finally, all the second limiting rods 402d are tightened again.

[0107] In addition, the first arc-shaped groove 401k is provided with a limiting groove at the position matched with the adjusting handle 402e. The adjusting handle 402e is clamped in the limiting groove, the second limiting rod 402d extends into the first arc-shaped groove 401k, and the adjusting handle 402e is tightened to the second bottom plate 402a through the second limiting rod 402d. The locking of the adjusting handle 402e can fix the relative position of the first bottom plate 401a and the second bottom plate 402a, so as to ensure that the overall azimuth position of the equatorial mount is stable after adjustment, and the equatorial mount is not easy to deviate even when the device needs to be adjusted.

[0108] In some embodiments of the present application, the right ascension shaft hybrid reduction transmission assembly 2 is fixed through the connecting seat and the supporting seat 401d;

[0109] The right ascension shaft hybrid reduction transmission assembly 2 is arranged in the rear shell 101, and the rear shell 101 is provided with a first trapezoidal boss;

[0110] The connecting seat comprises a first L-shaped part 401m and a second L-shaped part 401n which are detachable and combined to form a first trapezoidal groove matched with the first trapezoidal boss;

[0111] The first L-shaped part 401m and the second L-shaped part 401n are connected in a mutual embedding mode and locked by bolts.

[0112] As Figure 3As shown in the figure, the horizontal section of the first L-shaped part 401m and the horizontal section of the second L-shaped part 401n are connected in a mutually embedded manner, compared with the traditional flat surface connection, the stability is increased, the connection strength is improved; matched with the bolt locking, the connection loosening between the housing can be effectively prevented, which leads to the equipment falling and damage; and the vertical section constitutes the hypotenuse part of the first trapezoidal groove, when disassembling, only the bolt needs to be loosened to separate the two L-shaped parts, the quick separation of the housing 1 and the supporting seat 401d can be realized, and the storage of the equatorial telescope is more flexible.

[0113] For example Figure 3 As shown in the figure, the horizontal section of the first L-shaped part 401m is provided with an embedded notch, and the horizontal section of the second L-shaped part 401n is provided with an embedded boss, so that the two can be connected in a mutually embedded manner.

[0114] In some embodiments of the application, the right ascension shaft hybrid reduction transmission assembly 2 comprises:

[0115] The right ascension shaft motor 201 is installed in the rear housing 101 through a fixed support, and the right ascension shaft motor 201 is connected with the right ascension primary reducer 202 through a first adapter flange 205;

[0116] The output shaft of the right ascension primary reducer 202 is connected with the worm 203a of the right ascension secondary reducer 203 through a power transmission device 7, and the worm 203a of the right ascension secondary reducer 203 is parallel to the output end of the right ascension shaft motor 201;

[0117] The worm wheel 203b of the right ascension secondary reducer 203 is fixed with the inner ring of the cross roller bearing 5, and the plane of the worm wheel 203b of the right ascension secondary reducer 203 is arranged opposite to one side surface of the right ascension shaft motor 201.

[0118] The right ascension shaft motor 201 is connected with the input end of the harmonic reducer through an adapter flange. The output end of the harmonic reducer transmits power to the worm 203a through a reducer power transmission device 7 (the reducer power transmission device 7 can be a set of shaft couplings or precise gear mechanisms and the like). The worm 203a drives the turbine to form the second stage reduction. The fixed support of the reducer is connected with the housing 1 through a circular groove hole, and the meshing center distance of the worm wheel 203b and the worm 203a can be accurately adjusted by adjusting the position of the support, so that the transmission is stable and there is no over-tightening phenomenon.

[0119] The right ascension shaft motor 201 is installed in the rear housing 101 through a fixed support, the worm 203a of the right ascension secondary reducer 203 is parallel to the output end of the right ascension shaft motor 201, and the plane of the worm wheel 203b is opposite to one side surface of the right ascension shaft motor 201; based on the above arrangement of each component in the right ascension shaft hybrid reduction transmission assembly 2, the arrangement of the components is more compact, thereby reducing the radial dimension, greatly compressing the overall volume of the equatorial telescope, reducing the probability of interference between the main structure of the equipment and the surrounding equipment, and improving the portability.

[0120] As shown in Figure 8 and Figure 9 The right ascension shaft motor is located at the side wall of the rear shell 101 and is provided with a motor cover, and a laser beam parallelism adjusting mechanism 6 is also arranged directly below the right ascension shaft motor 201. The output end of the right ascension shaft motor 201 is provided with a first adapter flange 205, which is connected with a right ascension primary reducer 202. The right ascension primary reducer 202 is provided with a fixed support, and the bottom of the fixed support is fixed to the front end of the rear shell 101. The output shaft of the right ascension primary reducer 202 is connected with a worm 203a of a right ascension secondary reducer 203 through a power transmission device 7. The two ends of the worm 203a are also supported and fixed through a fixed support. A bearing is arranged between the worm 203a and the fixed support, so that the worm 203a can rotate in the fixed support. The worm 203a is parallel to the output shaft of the right ascension primary reducer 202 and is located below the right ascension primary reducer 202 with a certain angle, thereby avoiding a part of space for installing a worm wheel 203b, so as to optimize the space utilization of the rear shell 101 and reduce the volume of the equatorial mount.

[0121] Based on the structural design of the right ascension shaft hybrid reduction transmission assembly 2 of the present application, compared with the existing equatorial mount, the equatorial mount of the present application can provide a super-high reduction ratio of thousands to one or tens of thousands to one for the right ascension shaft under the same volume or weight, thereby solving the contradiction between the volume and the precision and the torque of the existing equatorial mount, greatly improving the output torque and the theoretical tracking resolution of the right ascension shaft, reducing the overall power consumption of the equatorial mount, improving the torque transmission stability of the right ascension shaft, and also improving the tracking accuracy and the tracking smoothness of the equatorial mount, so that the equatorial mount can meet the demand of the user for tracking accuracy under the application condition of not using a guide star and a counterweight, and greatly simplifies the dependence on peripheral equipment.

[0122] The output shaft of the right ascension secondary reducer 203 is the final output end of the right ascension shaft hybrid reduction transmission assembly 2 and is connected with a right ascension shaft output seat 204 through a crossed roller bearing 5, so as to output the motor power after two-stage reduction.

[0123] In addition, a control mainboard, a power supply and the like are also arranged in the rear shell 101 of the right ascension shaft hybrid reduction transmission assembly 2, and therefore, a switch button, a charging interface, a data interface and the like are also arranged on the rear shell 101.

[0124] In some embodiments of the present application, the right ascension shaft output seat 204 is provided with a second trapezoidal groove which is adaptively connected with the second trapezoidal boss of the front shell 102.

[0125] The second trapezoidal groove is provided with a clamping block 204a and an adjusting bolt 204b, the clamping block 204a is provided with a through hole, the adjusting bolt 204b passes through the through hole of the clamping block 204a and is connected with the threaded hole of the second trapezoidal boss in a matched mode;

[0126] One end of the second trapezoidal boss is provided with a limiting boss 102a, and the limiting boss 102a is limited by the right ascension shaft output seat 204.

[0127] In the same way as the rear shell 101 and the support seat 401d, the right ascension shaft output seat 204 is connected with the front shell 102 by using the structure of the trapezoidal groove and the trapezoidal boss, which has the characteristics of stable structure and convenient connection, and the specific action can refer to the action of the connection of the rear shell 101 and the support seat 401d, which will not be repeated here.

[0128] The second trapezoidal groove is provided with a clamping block 204a and an adjusting bolt 204b, the clamping block 204a is provided with a through hole, the adjusting bolt 204b passes through the through hole of the clamping block 204a and is connected with the threaded hole of the second trapezoidal boss in a matched mode;

[0129] In some embodiments of the present application, the declination shaft motor 301 is installed in the front shell 102, and the declination shaft motor 301 is connected with the declination shaft reducer 302 through the second adapter flange 303;

[0130] The declination shaft reducer 302 is a harmonic reducer, and the output end of the declination shaft reducer 302 is provided with a declination shaft output clamp 304.

[0131] The declination shaft motor 301 is installed on the declination shaft reducer 302 through the connecting piece by the declination shaft motor adapter flange 303, which has the advantages of low backlash, high response speed and accurate positioning; the output end of the declination shaft motor 301 is connected with the input end of the declination shaft reducer 302, which is used to improve the rotation resolution of the motor output shaft and increase the output torque; the declination shaft output clamp 304 is installed on the output end of the declination shaft reducer 302 through the connecting piece for connecting the working load.

[0132] In addition, the front shell 102 is also provided with a heavy hammer rod 8, and the torque generated by the gravity of the load can be balanced by adding a counterweight (such as a heavy hammer), so as to further improve the effective load of the equatorial telescope and ensure that the equatorial telescope can fully play its performance.

[0133] In some embodiments of the present application, the laser beam parallelism adjusting mechanism 6 comprises: a laser 601, an elastic fixing ring 602 and a laser beam parallelism adjusting block 603.

[0134] The laser beam parallelism adjusting block 603 is arranged in the rear shell 101, close to the side wall of the rear shell 101, and the laser 601 is fixed in the cavity of the laser beam parallelism adjusting block 603 through the elastic fixing ring 602;

[0135] The laser beam parallelism adjusting block 603 and the end face of the rear shell 101 corresponding to the light beam emitting end are provided with through holes corresponding to the light beam emitting end of the laser 601.

[0136] The tail end of the laser 601 is placed in the inner ring of the elastic fixing ring 602 and is installed in the laser beam parallelism adjusting block 603 through the outer ring of the elastic fixing ring 602, so as to provide the elastic reset capability of the laser 601; the laser beam parallelism adjusting block 603 is provided with a two-dimensional adjustable position structure, the front end position of the laser 601 can be adjusted in two dimensions through the structure, and the laser beam parallelism adjusting block 603 is provided with a mounting hole which can be mounted on the rear cavity side wall of the equatorial mount shell 1 through a connecting piece; the front end of the rear cavity of the equatorial mount shell 1 is provided with a circular micro through hole, so that the laser beam can pass through the through hole and be used for indirectly correcting the parallelism error between the laser beam and the declination axis.

[0137] By emitting the laser beam which is exactly parallel to the declination axis, the user can directly align the laser beam to the north celestial pole (or the south celestial pole), so that the polar axis calibration work is quickly and accurately completed, and the dependence on the polar axis mirror and the computer analysis of the polar axis is completely eliminated. Meanwhile, by using the laser beam parallelism adjusting block 603 and the elastic fixing ring 602, the parallelism calibration operation of the laser 601 is simple and stable, and only needs to be calibrated once and can be used for a long time, so that the peripheral configuration of the astronomical observation equipment is greatly simplified.

[0138] The two-dimensional adjustable structure is usually two sets of jacks, and the corresponding rear shell 101 is provided with jack through holes, and the front end of the laser 601 can be pushed to move along the X-axis and Y-axis directions by rotating / tightening the jacks, so that the parallelism adjustment range of about ±4° is realized.

[0139] In some embodiments of the application, the power transmission device 7 comprises:

[0140] The first synchronous wheel 701 is fixed on the output shaft of the declination primary reducer 202 by a screw;

[0141] The second synchronous wheel 702 is fixed on the worm 203a of the declination secondary reducer 203 by a screw;

[0142] The first synchronous wheel 701 and the second synchronous wheel 702 are drivingly connected through the synchronous belt 703.

[0143] The synchronous belt 703 has the characteristics of stable transmission, high transmission precision, high efficiency, strong load capacity, simple maintenance and long service life, and can reduce the influence on tracking precision to the maximum extent in the case of limited power transmission space layout.

[0144] Further, the power transmission device 7 further comprises a tension pulley 704 fixed on a support, which can be a fixed support of the first-degree right ascension reducer 202.

[0145] It can be understood that the power transmission device 7 can also be other power transmission devices such as a shaft coupling, a precision gear mechanism, a chain wheel and chain, etc.

[0146] In summary, the synchronous pulleys 701 and 702 and the synchronous belt 703 are used as the power transmission device 7, which can solve the technical limitation that other transmission devices cannot guarantee transmission precision due to large errors introduced in the case of limited power transmission space layout.

[0147] The above description is only one embodiment of the present application and a description of the technical principles applied. Those skilled in the art should understand that the scope of the application disclosed in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A hybrid reduction transmission equatorial mount based on crossed roller bearings, comprising a housing (1), a right ascension shaft hybrid reduction transmission assembly (2), a declination shaft reduction transmission assembly (3) and a base (4), the output of the right ascension shaft hybrid reduction transmission assembly (2) being perpendicular to the output of the declination shaft reduction transmission assembly (3), characterized in that, Also comprising a cross roller bearing (5) and a laser beam parallelism adjusting mechanism (6); The housing (1) comprises a rear housing (101) for mounting the right ascension shaft hybrid reduction transmission assembly (2) and a front housing (102) for mounting the declination shaft reduction transmission assembly (3); The right ascension shaft hybrid reduction transmission assembly (2) comprises a right ascension shaft motor (201), a right ascension first-stage reducer (202) and a right ascension second-stage reducer (203), the right ascension first-stage reducer (202) is a harmonic reducer, and the right ascension second-stage reducer (203) is a worm and gear transmission pair; The declination shaft reduction transmission assembly (3) comprises a declination shaft motor (301) and a declination shaft reducer (302); The outer ring of the cross roller bearing (5) is fixed on the rear housing (101), one end surface of the inner ring is fixed with the output end of the right ascension shaft hybrid reduction transmission assembly (2), and the other end surface of the inner ring is fixed with a right ascension shaft output seat (204); and the declination shaft reduction transmission assembly (3) is fixed on the right ascension shaft output seat (204).

2. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 1, characterized in that The base (4) comprises a latitude adjusting mechanism (401) and an azimuth adjusting mechanism (402) for realizing the azimuth and latitude adjustment of the hybrid reduction transmission equatorial mount and aligning the right ascension shaft of the equatorial mount with the earth rotation axis.

3. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 2, characterized in that The latitude adjusting mechanism (401) comprises: A first bottom plate (401a) and left and right side plates (401b and 401c) vertically fixed on the first bottom plate (401a); A support seat (401d) for adjusting latitude, which is arranged between the left and right side plates (401b and 401c) and provided with two blind holes in the two side surfaces corresponding to the left and right side plates (401b and 401c), the center axes of the two blind holes being on a straight line; Two first hand screws (401e) arranged oppositely and respectively penetrating through the through holes of the left and right side plates (401b and 401c) and extending into the corresponding blind holes; A guide plate (401f) rotatably arranged between the left and right side plates (401b and 401c); A second hand screw (401g) perpendicular to a threaded hole penetrating through the guide plate (401f) and extending into a rotating short shaft (401h); and 4. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 3, characterized in that The azimuth adjusting mechanism (402) comprises: A second bottom plate (402a) is arranged below the first bottom plate (401a), the first bottom plate (401a) is provided with a plurality of first arc-shaped grooves (401k), and the second bottom plate (402a) is provided with a plurality of second arc-shaped grooves (402b); A first limiting rod (402c) penetrates the second arc-shaped grooves (402b) and the first bottom plate (401a) from bottom to top and is fixed; A second limiting rod (402d) penetrating the first arc-shaped grooves (401k) from top to bottom is provided with an adjusting handle (402e) for locking the first bottom plate (401a) and the second bottom plate (402a); An azimuth angle adjusting column (402f) is fixedly arranged on the second bottom plate (402a); Two oppositely arranged third hand screws (402g) penetrate the threaded holes of the left side plate (401b) and the right side plate (401c) respectively and abut against the azimuth angle adjusting column (402f).

5. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 3, characterized in that The right ascension shaft hybrid reduction transmission assembly (2) is fixed with the support seat (401d) through a connecting seat; The right ascension shaft hybrid reduction transmission assembly (2) is arranged in the rear shell (101), and the rear shell (101) is provided with a first trapezoidal boss; The connecting seat comprises a first L-shaped part (401m) and a second L-shaped part (401n), the first L-shaped part (401m) and the second L-shaped part (401n) are combined to form a first trapezoidal groove matched with the first trapezoidal boss; The first L-shaped part (401m) and the second L-shaped part (401n) are connected in a mutual embedding mode and locked by bolts.

6. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 1, characterized in that The right ascension shaft hybrid reduction transmission assembly (2) comprises: The right ascension shaft motor (201) is installed in the rear shell (101) through a fixing support, and the right ascension shaft motor (201) is connected with the right ascension primary reducer (202) through a first adapter flange (205); The output shaft of the right ascension primary reducer (202) is connected with the worm (203a) of the right ascension secondary reducer (203) through a power transmission device (7), the worm (203a) of the right ascension secondary reducer (203) is parallel to the output end of the right ascension shaft motor (201), the worm wheel (203b) of the right ascension secondary reducer (203) is fixed with the inner ring of the cross roller bearing (5), and the plane of the worm wheel (203b) of the right ascension secondary reducer (203) is arranged opposite to one side surface of the right ascension shaft motor (201).

7. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 2, characterized in that The right ascension shaft output seat (204) is provided with a second trapezoidal groove matched with the second trapezoidal boss of the front shell (102); The second trapezoidal groove is provided with a clamping block (204a) and an adjusting bolt (204b), the clamping block (204a) is provided with a through hole, and the adjusting bolt (204b) penetrates the through hole of the clamping block (204a) and is connected with the threaded hole of the second trapezoidal boss in a matched mode. One end of the second trapezoidal boss is provided with a limiting boss (102a) which is limited by the right ascension output seat (204).

8. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 1, characterized in that, The right ascension shaft motor (301) is fixed in the front shell (102) through a fixed support, and is connected with the right ascension shaft speed reducer (302) through a second adapter flange (303). The right ascension shaft speed reducer (302) is a harmonic reducer, and an output end of the right ascension shaft speed reducer (302) is provided with a right ascension shaft output clamp (304).

9. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 1, characterized in that The laser beam parallelism adjusting mechanism (6) comprises a laser (601), an elastic fixing ring (602) and a laser beam parallelism adjusting block (603). The laser beam parallelism adjusting block (603) is arranged in the rear shell (101) and close to the side wall of the rear shell (101), and the laser (601) is fixed in the cavity of the laser beam parallelism adjusting block (603) through the elastic fixing ring (602). The elastic fixing ring (602), the laser beam parallelism adjusting block (603) and the end face of the rear shell (101) corresponding to the beam emitting end are provided with through holes corresponding to the position of the beam emitting end of the laser (601).

10. A hybrid cross-roller bearing based reduction drive equatorial mount according to claim 6, characterized in that, The power transmission device (7) comprises: A first synchronous wheel (701) is fixed on the output shaft of the right ascension primary speed reducer (202) through a screw; A second synchronous wheel (702) is fixed on the worm (203a) of the right ascension secondary speed reducer (203) through a screw; A tensioning wheel (704); The first synchronous wheel (701) and the second synchronous wheel (702) are connected through a synchronous belt (703).

Images