阅读说明：本技术 一种角位移微驱动机构 (Angular displacement micro-driving mechanism ) 是由 张士军 于 2019-12-09 设计创作，主要内容包括：一种角位移微驱动机构,属于机械设计与制造技术领域,包括输入轴(1)、空心轴(2)、齿轮I(3)、弹性挡圈(4)、弹性挡圈(5)、套筒(6)、齿轮IV(7)、动力输出轴(8)、套筒(9)、轴承(10)、轴承端盖(11)、螺栓(12)、转动工作台(13)、轴承(14)、轴承(15)、端盖螺栓(16)、齿轮III(17)、轴套(18)、中间轴(19)、行星架(20)、齿轮II(21)、套筒(22)、支架(23)、轴承(24)、轴承端盖(25)、螺栓(26)、轴承(27)、轴承端盖(28)、蜗轮(29)、蜗杆(30)、密封圈(31)、螺栓(32)、挡圈(33)、弹性垫圈(34)、螺母(35),箱体(36),可以实现精密的角位移传动。(The utility model provides an angle displacement micro-drive mechanism, belong to mechanical design and manufacturing technical field, including input shaft (1), hollow shaft (2), gear I (3), circlip (4), circlip (5), sleeve (6), gear IV (7), power output shaft (8), sleeve (9), bearing (10), bearing end cover (11), bolt (12), swivel work head (13), bearing (14), bearing (15), end cover bolt (16), gear III (17), axle sleeve (18), jackshaft (19), planet carrier (20), gear II (21), sleeve (22), support (23), bearing (24), bearing end cover (25), bolt (26), bearing (27), bearing end cover (28), worm wheel (29), worm (30), sealing washer (31), bolt (32), retaining ring (33), elastic washer (34), The nut (35) and the box body (36) can realize precise angular displacement transmission.)

1. The utility model provides a little actuating mechanism of angle displacement, including input shaft (1), hollow shaft (2), gear I (3), circlip (4), circlip (5), sleeve (6), gear IV (7), power output shaft (8), sleeve (9), bearing (10), bearing end cover (11), bolt (12), swivel work head (13), bearing (14), bearing (15), end cover bolt (16), gear III (17), axle sleeve (18), jackshaft (19), planet carrier (20), gear II (21), sleeve (22), support (23), bearing (24), bearing end cover (25), bolt (26), bearing (27), bearing end cover (28), worm wheel (29), worm (30), sealing washer (31), bolt (32), retaining ring (33), elastic washer (34), Nut (35), box (36), its characterized in that: the hollow shaft (2) penetrates through a shaft hole of the box body (36) and is fixed on the box body (36) through a fixed shaft section (204) and a fixed boss (205) on the hollow shaft (2) by bolts (32), the bolts (32) are fixed on a bearing end cover (28), and the gear (I3) is mounted on a spline (202) on the hollow shaft (2) through a spline and is pressed on the boss (203) on the hollow shaft (2) through a spring retainer ring (4).

2. The micro-driving mechanism for angular displacement according to claim 1, wherein the gear II (21) and the gear I (3) are in backlash-free engagement which can ensure precise transmission accuracy, the hollow shaft (2) is hollow, and the input shaft 1 is mounted on the housing (36) through the hollow shaft (2) via a bearing (27).

3. The micro-driving mechanism for angular displacement according to claim 1, wherein the planet carrier (20) is mounted on the spline (101) of the input shaft (1) by a spline (2003), the planet carrier (20) is pressed on the boss (104) of the input shaft (1) by the spring retainer ring 5, the shaft section (803) of the power output shaft (8) is mounted in the unthreaded hole (103) of the input shaft (1), and the shaft section (803) of the power output shaft (8) and the unthreaded hole (103) of the input shaft (1) are in transition fit, which can ensure precise transmission precision.

4. The micro-driving mechanism for angular displacement according to claim 1, wherein the gear IV (7) is mounted on the spline (801) of the power output shaft (8) through a spline and is pressed on the boss (804) of the power output shaft (8) by the sleeve (9), the power output shaft (8) is mounted on the box body (36) through the sleeve (9) and the bearing (10), the bearing end cover (11) is fixed on the box body (36) through the bolt (12) and is pressed on the outer ring of the bearing (10), the other end of the power output shaft (8) is provided with an external thread (802), the rotating table (13) is mounted on the external thread (802) of the power output shaft (8) and is fastened on the power output shaft (8) through the bolt (35), the spring washer (340) and the retainer ring (33).

5. The angular displacement micro-driving mechanism according to claim 1, wherein the rotating table (13) is composed of a fixed seat (1301), a thin spring piece (1302) and a table (1303), the thin spring piece (1302) is connected with the fixed seat (1301) and the table (1303), when the angular displacement is driven, the power output shaft (8) drives the fixed seat (1301) to rotate, the fixed seat (1301) drives the table (1303) to rotate through the thin spring piece (1302), and the thin spring piece (1302) can eliminate vibration in motion and improve transmission precision.

6. An angular displacement micro-drive mechanism according to claim 1, characterized in that by the combination of worm and worm gear and planetary gear transmission, the total transmission ratio from the worm gear (30) to the power input to the rotary table (13) is the product of the worm and worm gear transmission ratio and the planetary gear transmission ratio, and the total transmission ratio of the angular displacement drive mechanism can reach one ten million, and precise angular displacement transmission can be realized.

Technical Field

The invention belongs to the technical field of mechanical design and manufacture, and particularly relates to an angular displacement micro-driving mechanism.

Background

The surface appearance formed after the machining of the mechanical part has great influence on the friction characteristic, contact rigidity, fatigue strength, matching, vibration, running precision and the like of the part, and the microscopic appearance of the machined surface of the workpiece is directly an important index for judging the quality of the workpiece. Such as in the mechanical industry. Therefore, it is of great importance to measure the surface micro-topography of the surface of the workpiece. In order to obtain the micro-morphology of the surface of a workpiece, a white light interference profile meter adopting a non-contact measurement method is a precise instrument for obtaining parameters such as the surface roughness of the workpiece with high precision. When the roughness of a workpiece is measured by using a white light interference profile meter, a workbench needs to be precisely rotated a little, which cannot be achieved at present. With the development of optical fiber communication and optical fiber sensing technologies, a precise angular displacement micro-motion mechanism is also required in the preparation of optoelectronic devices, but the current micro-motion angular displacement mechanism is difficult to achieve the required precision requirement and has higher price. Therefore, it is desirable to design an angular displacement driving mechanism capable of realizing precise micro-transmission.

Disclosure of Invention

The purpose of the invention is: in order to realize precise angular displacement micro-transmission and solve the problem of lack of a precise angular displacement driving mechanism at present, the angular displacement micro-driving mechanism capable of realizing precise micro-rotation is provided.

In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides an angle displacement micro-drive mechanism, including input shaft, hollow shaft, gear I, circlip, the sleeve, gear IV, power output shaft, the sleeve, the bearing end cover, the bolt, the swivel work head, the bearing, the end cover bolt, gear III, the axle sleeve, the jackshaft, the planet carrier, gear II, the sleeve, a support, the bearing end cover, the bolt, the bearing end cover, the worm wheel, the worm, the sealing washer, the bolt, the retaining ring, the cushion ring, the nut, the box, its characterized in that: the hollow shaft penetrates through a shaft hole of the box body and is fixed on the box body through a fixed shaft section and a fixed boss on the hollow shaft through bolts, the bolts are used for fixing a bearing end cover simultaneously, the gear I is installed on a spline on the hollow shaft through the spline and is pressed on the boss on the hollow shaft through a spring retainer ring, the gear II is meshed with the gear I without backlash, the precision transmission precision can be ensured through the meshing without backlash, the hollow shaft is hollow, the input shaft is installed on the box body through the bearing through the hollow shaft, the worm wheel is fixed at the end part of the input shaft through the spring retainer ring and is meshed with the worm, the two ends of the worm are installed on the box body through the bearing, the worm can freely rotate relative to the box body, the planet carrier is installed on the spline on the input shaft through the spline, the planet carrier is pressed on the boss of, the transmission device comprises a power output shaft, a gear IV, a rotary worktable, a bolt, a spring washer and a check ring, wherein the shaft section of the power output shaft is in transition fit with a unthreaded hole of an input shaft, the transition fit can ensure the precise transmission precision, the gear IV is arranged on the spline of the power output shaft through the spline and is pressed on a boss of the power output shaft through the sleeve, the power output shaft is arranged on a box body through the sleeve and a bearing, a bearing end cover is fixed on the box body through the bolt and is pressed on an outer ring of the bearing, the other end of the power output shaft is provided with an external thread, the rotary worktable is arranged on the external thread of the power output shaft and is fastened on the power output shaft through the bolt, the spring washer and the check ring, the rotary worktable consists of a fixed seat, a thin spring piece and a worktable, the power output shaft drives the, the transmission precision is improved, the left end of the intermediate shaft is arranged in an inner ring of the bearing, an outer ring of the bearing is arranged on the support, a bearing end cover is fixed on the support through a bolt and presses the outer ring of the bearing tightly, the right end of the intermediate shaft is arranged in the inner ring of the bearing, the outer ring of the bearing is arranged on the support, the bearing end cover is fixed on the support and presses the outer ring of the bearing tightly through a bolt, the intermediate shaft is designed with two splines and a spline, the gear III is matched with the spline on the intermediate shaft through a spline, the preferred spline is an involute spline, the involute spline has good centering property, the installation precision is improved, the gear II is arranged at the spline on the intermediate shaft, the gear II is pressed on a boss on the intermediate shaft under the action of a sleeve and the inner ring of the bearing, a planet carrier is arranged on an optical axis section, so as to ensure that the light hole is tightly contacted with the middle light shaft section and can freely rotate relatively. The driving force during working is transmitted into the worm wheel by the worm and is transmitted to the planetary mechanism driven by the input shaft to operate through the worm wheel.

The beneficial effects of the invention are: the invention combines the worm gear and the planetary gear to generate a great transmission ratio and realize the rotation of the nanometer micro-angular displacement; the angular displacement micro-driving mechanism is a pure mechanical angular displacement micro-driving mechanism, does not need a capacitor, does not generate an electromagnetic effect, and does not generate an electrothermal effect, so that the mechanism does not influence the operation of other parts, and the operation precision of equipment is improved; the angular displacement micro-driving mechanism does not adopt piezoelectric ceramics, so that the cost is low; the movable worktable is provided with a thin spring piece which can eliminate vibration in motion and provide high-precision transmission.

Drawings

FIG. 1 is a schematic view of an angular displacement micro-drive mechanism of the present invention.

FIG. 2 input shaft

FIG. 3 Power take-off shaft

FIG. 4 hollow shaft

FIG. 5 center shaft

FIG. 6 planetary carrier

FIG. 7 is a sectional view of the rotary table

FIG. 8 is a view taken along the line A of FIG. 7

In the figure, 1, an input shaft, 2, a hollow shaft, 3, a gear I, 4, a circlip, 5, a circlip, 6, a sleeve, 7, a gear IV, 8, a power output shaft, 9, a sleeve, 10, a bearing, 11, a bearing end cover, 12, a bolt, 13, a rotary table, 14, a bearing, 15, a bearing end cover, 16, a bolt, 17, a gear III, 18, a shaft sleeve, 19, an intermediate shaft, 20, a planet carrier, 21, a gear II, 22, a sleeve, 23, a bracket, 24, a bearing, 25, a bearing end cover, 26, a bolt, 27, a bearing, 28, a bearing end cover, 29, a worm wheel, 30, a worm, 31, a seal ring, 32, a bolt, 33, a circlip, 34, a spring washer, 35, a nut, 36, a box body, 101, a spline, 102, a spring washer, 103, a light hole, 104, a boss, 201, a spring washer groove, 202, a spline, 203, a boss, 204, 205. the device comprises a fixed boss 801, a spline 802, an external thread 803, an optical axis section 804, a boss 1301, a fixed seat 1302, a thin spring piece 1303, a workbench 1901, a spline 1902, an optical axis section 1903, a spline 1904, a boss, 2001, a unthreaded hole 2002, a chamfer 2003, a spline 2004 and a chamfer.

Detailed Description

The invention is described in further detail below with reference to the figures and specific embodiments.

The invention provides an angular displacement micro-driving mechanism, which comprises an input shaft 1, a hollow shaft 2, a gear I3, a circlip 4, a circlip 5, a sleeve 6, a gear IV7, a power output shaft 8, a sleeve 9, a bearing 10, a bearing end cover 11, a bolt 12, a rotary worktable 13, a bearing 14, a bearing 15, an end cover bolt 16, a gear III17, a shaft sleeve 18, an intermediate shaft 19, a planet carrier 20, a gear II21, a sleeve 22, a bracket 23, a bearing 24, a bearing end cover 25, a bolt 26, a bearing 27, a bearing end cover 28, a worm wheel 29, a worm 30, a sealing ring 31, a bolt 32, a circlip 33, an elastic washer 34, a nut 35 and a box body 36, and is characterized in that: the hollow shaft 2 passes through the shaft hole of the box body 36, passes through a fixed shaft section 204 and a fixed boss 205 on the hollow shaft 2, and is fixed on the box body 36 by bolts 32, the bolts 32 simultaneously fix the bearing end cover 28, the gear I3 is mounted on a spline 202 on the hollow shaft 2 by a spline, and is pressed on a boss 203 on the hollow shaft 2 by a spring retainer 4, the gear II21 is meshed with a gear I3 without backlash, the backlash meshing can ensure precise transmission precision, the hollow shaft 2 is hollow, the input shaft 1 is mounted on the box body 36 by a bearing 27 through the hollow shaft 2, a worm wheel 29 is fixed on the end part of the input shaft 1 by a spring retainer 5, the worm wheel 29 is meshed with a worm 30, two ends of the worm 30 are mounted on the box body 36 by bearings, the worm 30 can freely rotate relative to the box body 36, the planet carrier 20 is mounted on the spline 101 on the input shaft 1 by a spline 2003, the planet carrier 20 is pressed on, the shaft section 803 of the power output shaft 8 is installed in the unthreaded hole 103 of the input shaft 1, the shaft section 803 of the power output shaft 8 and the unthreaded hole 103 of the input shaft 1 are in transition fit, the transition fit can ensure precise transmission precision, a gear IV7 is installed on a spline 801 of the power output shaft 8 through a spline and is pressed on a boss 804 of the power output shaft 8 through a sleeve 9, the power output shaft 8 is installed on a box body 36 through the sleeve 9 and a bearing 10, a bearing end cover 11 is fixed on the box body 36 through a bolt 12 and is pressed on an outer ring of the bearing 10, the other end of the power output shaft 8 is provided with an external thread 802, a rotating workbench 13 is installed on the external thread 802 of the power output shaft 8 and is fastened on the power output shaft 8 through a bolt 35, a spring washer 34 and a retainer ring 33, the rotating workbench 13 consists of a fixed seat 1301, a thin spring plate 1302 and a workbench 1303, the thin spring plate, when the angular displacement drive is carried out, the power output shaft 8 drives the fixed seat 1301 to rotate, the fixed seat 1301 drives the workbench 1303 to rotate through the thin spring piece 1302, the thin spring piece 1302 can eliminate vibration in motion and improve transmission precision, the left end of the intermediate shaft 19 is installed in an inner ring of the bearing 14, an outer ring of the bearing 14 is installed on the support 23, the bearing end cover 15 is fixed on the support 23 through the bolt 16 and presses the outer ring of the bearing 14, the right end of the intermediate shaft 19 is installed in an inner ring of the bearing 24, an outer ring of the bearing 24 is installed on the support 23, the bearing end cover 25 is fixed on the support 23 through the bolt 26 and presses the outer ring of the bearing 24, the intermediate shaft 19 is designed with a spline 1901 and a spline 1903, the gear III17 is matched with the spline 1901 on the intermediate shaft 19 through the spline, the preferred spline is, the installation accuracy is improved, the gear II21 is installed at a spline 1903 on the intermediate shaft 19, the gear II21 is pressed on a boss 1904 on the intermediate shaft 19 under the action of the sleeve 22 and the inner ring of the bearing 24, the planet carrier 20 is installed on the optical axis section 1902 of the intermediate shaft 19, and the unthreaded hole 2001 of the planet carrier 20 is in transition fit with the optical axis section 1902 of the intermediate shaft 19 so as to ensure that the unthreaded hole 2001 is in close contact with the intermediate optical axis section 1902 and can freely and relatively rotate.

The invention relates to an angular displacement micro-driving mechanism, wherein the driving force during working is transmitted into a worm wheel 29 by a worm 30 and is transmitted into a planetary mechanism consisting of an input shaft 1, a planet carrier 20, an intermediate shaft 19, a gear I3, a gear II21, a gear III17, a gear IV7 and a power output shaft 8 through the worm wheel 29, the power transmitted to the worm wheel is firstly transmitted onto the input shaft 1, the input shaft 1 drives the planet carrier 20 to rotate, the intermediate shaft 19 further rotates, the intermediate shaft 19 rotates to drive the gear II21 and the gear III17 to rotate,the gear III17, the gear IV7 are meshed without backlash, finally power is transmitted to the rotary worktable 13 through the gear IV7 and the power output shaft 8, angular displacement micro-driving of the rotary worktable 13 is realized, and in the angular displacement micro-driving mechanism, the number of teeth of the gear I3 is set to be z_3，Gear II21 having a number of teeth z₂₁The number of teeth of the gear IV7 is z₇The number of teeth of the gear III17 is z₁₇Then, the transmission ratio of the input shaft 1 to the power output shaft 8 is

Preferably z₇=100，z₁₇=101，z₂₁=100，z₃When the molar ratio is not less than 99,

setting the transmission ratio of worm and gear as

The overall gear ratio from the worm gear 30 to the power input to the rotary table 13 is then the product of the worm gear ratio and the planetary gear ratio

The transmission of the worm gear and the worm can be very large, even to one thousandth, so that the total transmission ratio of the angular displacement driving mechanism can reach one million, and precise angular displacement transmission can be realized.

Finally, it should also be noted that the above example is only one specific embodiment of the present invention. It is obvious that the invention is not limited solely to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.