A compact two-axis manual angle reference turntable

Abstract

A compact biaxial manual angle reference turntable, comprising a base. An azimuth axis is installed at the upper end of the base through an azimuth bearing assembly. An azimuth normally-closed end tooth locking assembly connected to the bottom of the azimuth axis is provided inside the base. The lower end of the azimuth normally-closed end tooth locking assembly is sequentially connected to an azimuth cam assembly disposed outside the base through an azimuth translation plate, a B azimuth connecting rod, and an A azimuth connecting rod. The upper end of the azimuth axis is installed with a T-shaped azimuth frame. A pitching axis is installed in the T-shaped azimuth frame through a pitching bearing assembly. A pitching normally-closed end tooth locking assembly is provided at the left end of the pitching axis. An azimuth scale is provided outside the pitching normally-closed end tooth locking assembly and is connected to the left end of the T-shaped azimuth frame. The left end of the pitching normally-closed end tooth locking assembly is sequentially connected to a pitching cam disposed outside the azimuth scale through a pitching translation plate and a pitching cam screw. The right end of the pitching axis is connected to an L-shaped pitching frame. The present invention has the characteristics of a large test range and simple and practical operation.

Description

Technical Field

[0001] The invention belongs to the application field of angle position calibration and test system calibration, and in particular relates to a compact dual-axis manual angle reference turntable. Background Art

[0002] Commonly used angle sensors include circular gratings, synchronizers, time gratings and rotary transformers. Circular gratings, as a precision measuring tool, have been widely used in precision instruments, precise positioning and high-precision precision machining. All these angle sensors must use dedicated electronic equipment to calculate the angle information and display it in a digital form.

[0003] Metal polyhedrons are used as the angle measurement reference. Commonly used metal polyhedrons have 23 or 24 faces. The errors between the small mirror faces have been given by precision measurement equipment, and the maximum error is generally less than 0.5". In the case of precision angle measurement, these errors need to be used to correct the object being measured to obtain more accurate measurement results.

[0004] Common mechanical shaft locking mechanisms include electromagnetic brakes, expansion locking mechanisms, pin locking mechanisms, and end gear locking mechanisms. The movable and fixed teeth in the end gear locking mechanism are precision machined, with a minimum mechanical resolution of 1 degree and a positioning accuracy of 0.2 arc seconds. The number of teeth on the end face movable teeth and fixed gears in the end gear locking mechanism used in this case is 72, and the meshing of the two can achieve a mechanical position resolution of 5 degrees for the two shafts.

[0005] The main existing problems are as follows: In the actual test process, taking a 24-sided prism as an example, first use a photoelectric autocollimator to aim at a certain reference plane, recorded as plane 1, then rotate 15 degrees, read the autocollimator reading of the second plane, and so on, until all reference planes are tested; because when manually rotated to the stop position, it usually relies on friction to stop at a position with an integer multiple of 15 degrees, and the test process is extremely inconvenient; some test fixtures also use pin positioning, which is not easy to guarantee positioning accuracy and has a small number of positions; and the existing small angle reference turntable only has an azimuth axis, and the test range is limited.

[0006] On the other hand, in order to improve the supporting stiffness, the pitch axis system of the dual-axis turntable usually arranges two bearing assemblies symmetrically on the left and right, so the overall size and weight of the pitch frame and pitch axis system are large. Summary of the invention

[0007] The purpose of the present invention is to provide a compact dual-axis manual angle reference turntable to solve the problems in the above-mentioned background technology, which has the characteristics of large test range, simple and practical operation.

[0008] The technical solution adopted to achieve the above-mentioned purpose is a compact dual-axis manual angle reference turntable, including a base, an azimuth axis is installed on the upper end of the base via an azimuth bearing assembly, an azimuth normally closed end tooth locking assembly connected to the bottom of the azimuth axis is arranged in the base, and the lower end of the azimuth normally closed end tooth locking assembly is connected to the azimuth cam assembly arranged on the outer side of the base via an azimuth translation plate, a B azimuth connecting rod, and an A azimuth connecting rod in sequence; a T-shaped azimuth frame is installed on the upper end of the azimuth axis, and a pitch bearing assembly is arranged in the T-shaped azimuth frame A pitch axis is installed, and a pitch normally closed end tooth locking assembly is provided at the left end of the pitch axis. A pitch dial connected to the left end of the T-shaped azimuth frame is provided at the outer side of the pitch normally closed end tooth locking assembly. The left end of the pitch normally closed end tooth locking assembly is connected to the pitch cam arranged at the outer side of the pitch dial via a pitch translation plate and a pitch cam screw in sequence. The right end of the pitch axis is connected to an L-shaped pitch frame and a counterweight. A prism transition plate is provided at the upper end of the L-shaped pitch frame, and the upper end of the prism transition plate is connected to the multifaceted prism via a prism core shaft.

[0009] Furthermore, the azimuth normally closed end tooth locking assembly includes an azimuth end tooth base fixedly connected to the base, an azimuth end tooth cross is provided at the lower end of the azimuth end tooth base, an azimuth fixed gear is provided at the upper end of the azimuth end tooth cross, an azimuth fixed gear is meshed at the upper end of the azimuth fixed gear with an azimuth movable gear fixedly connected to the azimuth shaft, and the lower end of the azimuth end tooth cross is fixedly connected to the azimuth translation plate.

[0010] Furthermore, the azimuth cam assembly includes an azimuth cam bracket fixed to the outside of the base, an azimuth cam screw is provided in the azimuth cam bracket, an azimuth cam is provided at the upper end of the azimuth cam bracket, and the azimuth cam is connected to the A azimuth connecting rod via the azimuth cam screw; a connecting rod bearing bracket is provided on one side of the azimuth cam bracket, and a connecting rod bearing matching the A azimuth connecting rod is provided in the connecting rod bearing bracket.

[0011] Furthermore, the pitch normally closed end tooth locking assembly includes a pitch end tooth base fixed at the left end of the T-shaped azimuth frame, one end of the pitch end tooth base is provided with a pitch end tooth cross, one side of the pitch end tooth cross is connected to the pitch translation plate, the other side of the pitch end tooth cross is fixed with a pitch fixed gear, and one side of the pitch fixed gear is meshed with a pitch movable gear connected to the pitch axis.

[0012] Furthermore, the B azimuth connecting rod and the azimuth translation plate are connected in the form of a ball and cone structure.

[0013] Beneficial Effects

[0014] Compared with the prior art, the present invention has the following advantages.

[0015] 1. The pitch axis system adopts a single bearing assembly, and the rotation range of the L-shaped pitch frame around the pitch axis system is limited to ±90 degrees, which not only meets the actual use requirements, but also reduces the turntable's external dimensions and overall weight, making it easier for users to use, carry and store;

[0016] 2. The pitch cam and azimuth cam are placed outside the turntable. Users can lock and loosen the pitch axis and azimuth axis by rotating the pitch cam and azimuth cam. The external operation method is simple and practical, and the user-friendly and easy-to-use process;

[0017] 3. The use of the polyhedron and the end gear locking assembly can provide an angle reference for the calibration or test system and calibrate the system error of the test system; the compact dual-axis manual angle reference turntable can simulate a reference "hemisphere" to provide richer test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a cross-sectional front view of the present invention;

[0021] Figure 3 It is a cross-sectional right view of the present invention;

[0022] Figure 4 is a cross-sectional view of the connecting rod mechanism in the present invention;

[0023] Figure 5 It is a structural front view of the present invention;

[0024] Figure 6 It is a structural side view of the present invention;

[0025] Figure 7 It is a top view of the structure of the present invention;

[0026] Figure 8 It is a schematic diagram of the normally closed locking assembly in the present invention;

[0027] Fig. 9 It is a schematic diagram of the connecting rod mechanism in the present invention;

[0028] Fig.10 It is a schematic diagram of the base of the normally closed locking assembly in the present invention;

[0029] Fig.11 This is a schematic diagram of a normally closed end-tooth cross bracket in the present invention;

[0030] Fig.12 It is a schematic diagram of the pitch assembly in the present invention;

[0031] Fig.13 It is a schematic diagram of the center component in the present invention. DETAILED DESCRIPTION

[0032] The following description of the embodiments will help the public better understand the present invention, but the specific embodiments given by the applicant cannot and should not be regarded as limitations on the technical solutions of the present invention. Any changes to the definitions of components or technical features and / or formal but not substantial changes to the overall structure should be regarded as the scope of protection defined by the technical solutions of the present invention.

[0033] The present invention will be further described below in conjunction with embodiments and drawings.

[0034] like Figure 1-Figure 13 As shown, a compact dual-axis manual angle reference turntable comprises a base 4, an azimuth axis 15 is mounted on the upper end of the base 4 via an azimuth bearing assembly 16, an azimuth normally closed end gear locking assembly 24 connected to the bottom of the azimuth axis 15 is arranged inside the base 4, and the lower end of the azimuth normally closed end gear locking assembly 24 is connected to an azimuth cam assembly 36 disposed on the outer side of the base 4 via an azimuth translation plate 23, a B azimuth connecting rod 22, and an A azimuth connecting rod 21 in sequence; a T-shaped azimuth frame 2 is mounted on the upper end of the azimuth axis 15, and a pitch axis 13 is mounted inside the T-shaped azimuth frame 2 via a pitch bearing assembly 14, The left end of the pitch axis 13 is provided with a pitch normally closed end tooth locking assembly 19, and the outer side of the pitch normally closed end tooth locking assembly 19 is provided with a pitch dial 9 connected to the left end of the T-shaped azimuth frame 2. The left end of the pitch normally closed end tooth locking assembly 19 is connected to the pitch cam 8 arranged on the outer side of the pitch dial 9 via the pitch translation plate 18 and the pitch cam screw 17 in sequence. The right end of the pitch axis 13 is connected to the L-shaped pitch frame 1 and the counterweight 3. The upper end of the L-shaped pitch frame 1 is provided with a prism transition plate 10, and the upper end of the prism transition plate 10 is connected to the polyhedral prism 12 via the prism core shaft 11.

[0035] The azimuth normally closed end tooth locking assembly 24 includes an azimuth end tooth base 34 fixedly connected to the base 4, an azimuth end tooth cross 35 is fitted in the azimuth end tooth base 34, an azimuth end tooth cross 35 is provided at the upper end of the azimuth end tooth cross 35, an azimuth fixed gear 33 is meshed at the upper end of the azimuth fixed gear 33 with an azimuth movable gear 32 fixedly connected to the azimuth shaft 15, and the lower end of the azimuth end tooth cross 35 is fixedly connected to the azimuth translation plate 23.

[0036] The azimuth cam assembly 36 includes an azimuth cam bracket 27 fixed to the outside of the base 4, an azimuth cam screw 20 is provided in the azimuth cam bracket 27, an azimuth cam 6 is provided at the upper end of the azimuth cam bracket 27, and the azimuth cam 6 is connected to the A azimuth connecting rod 21 via the azimuth cam screw 20; a connecting rod bearing bracket 26 is provided on one side of the azimuth cam bracket 27, and a connecting rod bearing 25 matching the A azimuth connecting rod 21 is provided in the connecting rod bearing bracket 26.

[0037] The pitch normally closed end tooth locking assembly 19 includes a pitch end tooth base 28 fixed to the left end of the T-shaped azimuth frame 2, and a pitch end tooth cross 29 is fitted in the pitch end tooth base 28. One side of the pitch end tooth cross 29 is connected to the pitch translation plate 18, and the other side of the pitch end tooth cross 29 is fixed with a pitch fixed gear 30, and one side of the pitch fixed gear 30 is meshed with a pitch movable gear 31 connected to the pitch axis 13.

[0038] The B azimuth connecting rod 22 and the azimuth translation plate 23 are connected in the form of a ball and cone structure.

[0039] The present invention is a two-axis turntable, the outer ring is the azimuth axis, and the inner ring is the pitch axis. The L-shaped pitch frame 1 relies on its own characteristics to achieve the ±90 degree mechanical limit function, minimizes the turntable's external dimensions and its own weight, and is convenient for transportation and storage; a pitch normally closed end tooth locking assembly 19 is introduced at one end of the pitch axis 13, and the rotation amount is directly converted into axial movement amount to the pitch translation plate 18 by relying on the pitch cam 8, and then transmitted to the pitch normally closed end tooth locking assembly 19; an azimuth normally closed end tooth locking assembly 24 is introduced at the end of the azimuth axis 15, and the rotation amount is converted into axial movement amount by relying on the azimuth cam 6, which is transmitted in sequence to the A azimuth connecting rod 21, the B azimuth connecting rod 22 and the azimuth translation plate 23, and finally transmitted to the azimuth normally closed end tooth locking assembly 24.

[0040] The working principle of the present invention is that the compact dual-axis manual angle reference turntable is a series mechanism in which a pitch axis 13 and an azimuth axis 15 are orthogonal. The L-shaped pitch frame 1 is fixed to the pitch axis 13, and the pitch axis 13 is supported by a pitch bearing assembly 14, so that the L-shaped pitch frame 1 can rotate around the axis of the pitch axis 13. When the pitch axis is rotated to a positive (negative) 90-degree position, the T-shaped azimuth frame 1 will limit the position. When the pitch axis end is locked, the rotating pitch cam 8 transmits the cam eccentricity through the pitch cam screw 17 and the pitch translation plate 18 to the pitch normally closed end tooth locking assembly 19, so that the pitch axis 13 is loosened. When the pitch axis 13 is freely rotated, and when it is rotated to the specified position, the pitch cam 8 is rotated in the opposite direction, and the pitch axis system is locked by relying on the characteristics of the pitch normally closed end tooth locking assembly 19; when the azimuth axis end is locked, the rotating azimuth cam 6 transfers the cam eccentricity via the A azimuth connecting rod 21, the B azimuth connecting rod 22 and the azimuth translation plate 23 to the azimuth normally closed end tooth locking assembly 24, so as to loosen the azimuth axis 15. At this time, the azimuth axis 15 is freely rotated, and when it is rotated to the specified position, the reverse rotating azimuth cam 6 relies on the characteristics of the azimuth normally closed end tooth locking assembly 24 to lock the azimuth axis system.

[0041] In the specific implementation of the present invention, the base 4 is mainly supported, the azimuth bearing assembly 16 is fixed on the upper end surface of the base 4 with screws, and then the azimuth shaft 15 and the azimuth bearing assembly 16 are matched; the azimuth end tooth base 34 is fixed with screws inside the base 4, and the azimuth moving gear 32 and the azimuth shaft 15 are fixed with screws, the azimuth fixed gear 33 and the azimuth end tooth cross 35 are fixed with screws, and the azimuth translation plate 23 is fixed at the lower end of the azimuth end tooth cross 35 with screws, the B azimuth connecting rod 22 and the azimuth translation plate 23 are connected in the form of ball and cone matching, the B azimuth connecting rod 22 and the A azimuth connecting rod 21 are connected by pins, the A azimuth connecting rod 21 and the azimuth cam screw 20 are pin-matched, and the azimuth cam screw 20 and the azimuth cam 6 are connected by pins.

[0042] Fix the connecting rod bearing bracket 26 and the azimuth cam bracket 27 with screws on the outside of the base 4, install the connecting rod bearing 25 inside the connecting rod bearing bracket 26, and cooperate the middle section of the A azimuth connecting rod 21 with the connecting rod bearing 25, so that the azimuth cam 6 rotates to drive the azimuth cam screw 20, A azimuth connecting rod 21, B azimuth connecting rod 22 and the azimuth translation plate 23 to move. When the azimuth cam 6 is working, there is sliding friction with the azimuth cam bracket 27, and finally the azimuth normally closed end tooth locking assembly 24 is used to lock and release the azimuth shaft 15.

[0043] The T-shaped azimuth frame 2 is fixed to the upper end surface of the azimuth axis 15 with screws, the pitch bearing assembly 14 is fixed inside the T-shaped azimuth frame 2 with screws, the pitch axis 13 and the pitch bearing assembly 14 are matched, and the L-shaped pitch frame 1 and the counterweight 3 are fixed to the right end of the pitch axis 13 with screws, the pitch end tooth base 28 and the pitch scale plate 9 are fixed to the left end of the T-shaped azimuth frame 2 with screws, and the pitch movable gear 31 is fixed to the pitch axis 13 with screws, the pitch fixed gear 30 is fixed to the pitch end tooth cross 29 with screws, and the pitch translation plate 18 is fixed to the left end of the pitch end tooth cross 29 with screws, the pitch cam screw 17 is directly matched with the pitch translation plate 18 thread, and the pitch cam screw 17 is matched with the pitch cam 8 pin. When the pitch cam 8 rotates, it slides and rubs with the left end surface of the pitch scale plate 9, and finally the pitch normally closed end tooth locking assembly 19 is realized to lock and release the pitch axis 13.

[0044] A prism transition plate 10 is fixed to the upper end of the L-shaped pitch frame 1 by screws, a prism core shaft 11 is fixed to the upper end of the prism transition plate 10 by screws, and a polyhedral prism 12 is fixed to the upper end of the prism core shaft 11 .

[0045] In practical applications, the normally closed end tooth locking assembly described in the present invention can increase or decrease the number of teeth according to actual resolution requirements to meet different application scenarios.

Claims

1. A compact dual-axis manual angle reference turntable, comprising a base (4), It is characterized in that An azimuth shaft (15) is mounted on the upper end of the base (4) via an azimuth bearing assembly (16); an azimuth normally closed end tooth locking assembly (24) connected to the bottom of the azimuth shaft (15) is disposed inside the base (4); the lower end of the azimuth normally closed end tooth locking assembly (24) is connected to an azimuth cam assembly (36) disposed outside the base (4) via an azimuth translation plate (23), a B azimuth connecting rod (22), and an A azimuth connecting rod (21) in sequence; a T-shaped azimuth frame (2) is mounted on the upper end of the azimuth shaft (15); a pitch shaft (13) is mounted inside the T-shaped azimuth frame (2) via a pitch bearing assembly (14); a pitch shaft (13) is disposed at the left end of the pitch shaft (13). A normally closed end tooth locking assembly (19) is provided on the outside of the normally closed end tooth locking assembly (19) and is connected to the left end of the T-shaped azimuth frame (2). The left end of the normally closed end tooth locking assembly (19) is connected to a pitch cam (8) disposed on the outside of the pitch scale plate (9) via a pitch translation plate (18) and a pitch cam screw (17) in sequence. The right end of the pitch shaft (13) is connected to an L-shaped pitch frame (1) and a counterweight (3). A prism transition plate (10) is provided on the upper end of the L-shaped pitch frame (1). The upper end of the prism transition plate (10) is connected to the multifaceted prism (12) via a prism core shaft (11). The azimuth normally closed end tooth locking assembly (24) comprises an azimuth end tooth base (34) fixedly connected to the base (4), an azimuth end tooth cross (35) is fitted in the azimuth end tooth base (34), an azimuth end tooth cross (35) is provided at the upper end of the azimuth end tooth cross (35), an azimuth fixed gear (33) is meshed at the upper end of the azimuth fixed gear (33) is meshed with an azimuth movable gear (32) fixedly connected to the azimuth shaft (15), and the lower end of the azimuth end tooth cross (35) is fixedly connected to the azimuth translation plate (23); The azimuth cam assembly (36) comprises an azimuth cam bracket (27) fixed to the outside of the base (4), an azimuth cam screw (20) being arranged in the azimuth cam bracket (27), an azimuth cam (6) being arranged at the upper end of the azimuth cam bracket (27), and the azimuth cam (6) being connected to an A azimuth connecting rod (21) via the azimuth cam screw (20); a connecting rod bearing bracket (26) being arranged on one side of the azimuth cam bracket (27), and a connecting rod bearing (25) matching with the A azimuth connecting rod (21) being arranged in the connecting rod bearing bracket (26).

2. A compact dual-axis manual angle reference turntable according to claim 1, It is characterized in that The pitch normally closed end tooth locking assembly (19) comprises a pitch end tooth base (28) fixed to the left end of the T-shaped azimuth frame (2), a pitch end tooth cross (29) being fitted in the pitch end tooth base (28), one side of the pitch end tooth cross (29) being connected to the pitch translation plate (18), and the other side of the pitch end tooth cross (29) being fixed with a pitch fixed gear (30), and one side of the pitch fixed gear (30) being meshed with a pitch movable gear (31) connected to the pitch shaft (13).

3. A compact dual-axis manual angle reference turntable according to claim 1, It is characterized in that The B azimuth connecting rod (22) and the azimuth translation plate (23) are connected in the form of a ball and cone structure.

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