CN114754111A - A micro-rotation angle adjustment device for theodolite - Google Patents

Abstract

The invention discloses a micro-rotation angle adjustment device for theodolites, belonging to the technical field of theodolites. A rotating assembly, a driving assembly and an adjusting assembly arranged on the upper side are provided. The inner cylinder and the outer cylinder are provided with an upper cover, an elastic washer is arranged between the upper cover and the plane bearing on the upper side, a torsion spring is sleeved outside the inner cylinder, the lower end of the torsion spring enters the inner cylinder, and the upper end of the torsion spring enters the outer cylinder. Inside the cylinder, the outer circle of the upper end of the outer cylinder is provided with a cylinder thread, the outer circle of the outer cylinder on the lower side of the cylinder thread is provided with a wall frame and a shaft wall block, the end face of the wall frame is provided with a frame threaded hole, and the inner wall frame is provided with a threaded hole. The frame cavity, the shaft wall block has a wall block cavity, and the end face of the shaft wall block is provided with a circular array of card holes. This micro-angle adjustment device for theodolite has no backlash and can adjust the debugging resistance.

Description

A micro-rotation angle adjustment device for theodolite

technical field

The invention belongs to the technical field of theodolites, and in particular relates to a micro-rotation angle adjustment device for theodolites.

Background technique

Theodolite is a measuring instrument designed to measure horizontal and vertical angles based on the principle of angle measurement. It is divided into two types: optical theodolite and electronic theodolite. The most commonly used is electronic theodolite. direction. The theodolite has two mutually perpendicular axes to adjust the azimuth and horizontal height of the telescope.

Theodolite usually has a rotating shaft that bears radial load, and this rotating shaft has the requirement of fine-tuning the rotation angle. The existing adjustment scheme is usually a reduction gear set, which restricts the rotation resistance of the gear with a smaller number of teeth through an adjustable damping device. The horizontal angle adjustment of the rotating shaft is realized by the method, and after the angle adjustment is completed, a locking device needs to be used to complete the locking of the gears, thereby completing the angle locking of the rotating shaft. There are two problems with this scheme. There is inevitably a large gap in the adjustment scheme, and the mutual meshing of multiple sets of gears will further increase this gap, resulting in a large adjustment gap for the adjustment handwheel. The second is that the locking device will increase the structural complexity of the entire shaft, resulting in reliable To solve the problem of reduced performance, a rotating shaft needs a reduction gear set, an adjustable damping device and a locking device to complete the required function.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a micro-rotation angle adjustment device for the theodolite, so as to solve the above-mentioned problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: a micro-rotation angle adjustment device for the theodolite, comprising a rotating assembly, a driving assembly and an adjustment assembly arranged on the upper side;

The above-mentioned rotating assembly includes an outer cylinder and an inner cylinder that is rotatably connected to it through a plane bearing in its interior, an upper cover is arranged above the outer cylinder, an elastic washer is arranged between the upper cover and the upper plane bearing, and the outer sleeve of the inner cylinder is sleeved. A torsion spring is provided, the lower end of the torsion spring enters the interior of the inner cylinder, and the upper end of the torsion spring enters the interior of the outer cylinder;

The outer circumference of the upper end of the outer cylinder is provided with a cylinder thread, the outer circumference of the outer cylinder on the lower side of the cylinder thread is provided with a wall frame and a shaft wall block, the end surface of the wall frame is provided with a frame threaded hole, and the wall frame is internally opened. There is a frame cavity, a wall block cavity is opened in the above-mentioned shaft wall block, an annular array of clamping holes are formed on the end face of the above-mentioned shaft wall block, and an upper spring end hole and a vertical end hole are formed on the side wall of the above-mentioned outer cylinder facing away from the wall frame. a groove, the lower edge of the above-mentioned outer cylinder is provided with a cylinder inner ring;

The above-mentioned drive assembly includes a supporting insert block, the above-mentioned supporting insert block is composed of a panel and an embedded strip, the edge of the above-mentioned panel is provided with a plate edge hole, the two ends of the above-mentioned embedded strip are strip end blocks, and the middle part of the above-mentioned strip end block is open. There is a block accommodating opening, two sides of the above-mentioned embedded strip are provided with supporting blocks, a block inner hole is opened in the above-mentioned supporting block, and the middle part of the above-mentioned supporting and inserting block is an oil filling port;

The inner hole of the above-mentioned block is provided with an inner rotating shaft, the outer circle of the above-mentioned inner rotating shaft is provided with a shaft outer circular groove, the two sides of the above-mentioned inner rotating shaft are opened with a shaft spring groove, and the axis line of the above-mentioned inner rotating shaft is opened with a shaft hexagonal groove and a shaft. a threaded hole, a worm, a retaining spring and a rod end washer are sleeved on the outside of the inner rotating shaft, a rod cavity is opened in the worm, and an inner edge of the cavity is arranged in the rod cavity;

The above-mentioned adjustment assembly includes a hand-tightening bolt and its inner connecting bolt. The above-mentioned hand-tightening bolt is composed of a coaxial bolt head, a bolt section, a bolt shaft and a hexagonal rod. A section cavity is opened in the above-mentioned bolt section. There is a bolt channel, and a spring and a top column are arranged in the above-mentioned section cavity.

Preferably, the inner wall of the upper cover is provided with a cover thread, and the upper edge of the upper cover is provided with a cover inner ring;

The upper side of the above-mentioned inner cylinder is provided with an upper cylinder ring, the lower side of the above-mentioned inner cylinder is provided with a lower cylinder ring, the outer circle of the inner cylinder on the lower side of the above-mentioned upper cylinder ring is provided with worm gear teeth, and the above-mentioned lower cylinder ring is provided with a lower spring end hole;

The upper end of the torsion spring is an upper insertion end, and the lower end of the torsion spring is a lower insertion end.

Preferably, the torsion spring is located between the upper barrel ring and the lower barrel ring, the upper spigot end is located inside the end hole of the upper spring, and the lower spigot end is located inside the end hole of the lower spring.

Preferably, there are two plane bearings, the plane bearing on the upper side is located between the upper cylinder ring and the elastic washer, the plane bearing on the lower side is located between the lower cylinder ring and the inner ring of the cylinder, and the inner ring of the cover is pressed against the elastic washer above.

Preferably, a snap spring is fixed inside the shaft spring groove, the inner edge of the cavity is embedded in the shaft outer circular groove, one side of the rod end washer is fitted with the bearing block, and the other side of the rod end washer is connected to the end of the worm. Department fit.

Preferably, the above-mentioned plate edge hole is provided with a countersunk head screw that enters the inside of the frame threaded hole, and the above-mentioned embedded strip enters the inside of the frame cavity.

Preferably, a nozzle screw is provided inside the oil injection port, and an oil seal gasket is provided between the nozzle screw and the oil injection port.

Preferably, the connecting bolt is located inside the bolt channel and the threaded hole of the shaft, and the hexagonal rod is located inside the hexagonal groove of the shaft.

Preferably, the above-mentioned bolt shaft is located inside the wall block cavity.

Preferably, the end of the top post is provided with a bump, and the bump corresponds to the outline of the clamping hole.

Technical effects and advantages of the present invention:

The micro-rotation angle adjustment device for the theodolite adopts the scheme of meshing the worm and the worm gear to realize the angle adjustment. The torsion of the torsion spring eliminates the meshing gap between the worm gear and the worm, and the torsion of the torsion spring acts on the worm, which will cause the reaction of its rotation. When the torsion force changes, the meshing transmission of the worm and the worm gear teeth is one-way, which acts as an equivalent locking device. The transmission mode of the torsion spring, the worm gear teeth and the worm screw realizes the reduction gear set, the adjustable damping device and the locking device at the same time. function, and the structure is simpler.

The rotation of the inner shaft is realized by turning the hand-tightening bolt. The structure of the spring, the top column and the clamping hole makes the rotation of the hand-tightening bolt have a sense of paragraph. So as to achieve fine-tuning technical effect.

Description of drawings

1 is a schematic structural diagram of a micro-rotation angle adjustment device for a theodolite in an embodiment of the present invention;

2 is a schematic structural diagram of a micro-rotation angle adjustment device for the theodolite in a state where the outer cylinder is removed in an embodiment of the present invention;

3 is a schematic diagram of the upper side structure of the rotating assembly in the separated state according to the embodiment of the present invention;

4 is a schematic diagram of the lower side structure of the rotating assembly in the separated state according to the embodiment of the present invention;

FIG. 5 is a schematic view of the structure of the lower side of the outer cylinder in the embodiment of the present invention;

6 is a schematic structural diagram of the disassembled state of the drive assembly on the hexagonal slot side of the shaft according to the embodiment of the present invention;

7 is a schematic structural diagram of the disassembled state of the drive assembly on the side of the shaft threaded hole in the embodiment of the present invention;

FIG. 8 is a schematic structural diagram of the separation state of the adjustment component in the embodiment of the present invention.

In the figure: 100, rotating assembly; 1, upper cover; 101, cover inner ring; 102, cover thread; 2, elastic washer; 3, plane bearing; 4, inner cylinder; 401, upper cylinder ring; 402, worm gear teeth; 403, lower barrel ring; 404, lower spring end hole; 5, torsion spring; 501, upper spigot; 502, lower spigot; 6, outer barrel; 601, barrel thread; 602, wall frame; 603, frame threaded hole ;604, frame cavity; 605, shaft wall block; 606, wall block cavity; 607, card hole; 608, upper spring end hole; 609, vertical groove; 610, cylinder inner ring; 200, drive assembly; 7, support Insert block; 701, panel; 702, plate edge hole; 703, insert strip; 704, end block; 705, block opening; 706, support block; 707, block inner hole; 708, oil filling port; 8, Inner shaft; 801, shaft outer circular groove; 802, shaft spring groove; 803, shaft hexagonal groove; 804, shaft threaded hole; 9, worm; 901, rod cavity; 902, cavity inner edge; 10, circlip; 11, Rod end washer; 12, countersunk head screw; 13, oil seal gasket; 14, nozzle screw; 300, adjustment assembly; 15, hand screw; 1501, bolt head; 1502, bolt section; 1503, section cavity; 1504, Bolt shaft; 1505, hexagonal rod; 1506, bolt channel; 16, spring; 17, top column; 18, connecting bolt.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

For an embodiment, please refer to FIGS. 1 to 8 , a micro-rotation angle adjustment device for the theodolite includes a rotating assembly 100, a driving assembly 200 and an adjusting assembly 300 disposed on the upper side, and the rotating assembly 100 includes an outer cylinder 6 and an adjustment assembly 300. The inner cylinder 4 is rotatably connected with the plane bearing 3 in its interior, an upper cover 1 is arranged above the outer cylinder 6, an elastic washer 2 is arranged between the upper cover 1 and the plane bearing 3 on the upper side, and the inner wall of the upper cover 1 is provided with a cover Thread 102, the upper edge of the upper cover 1 is provided with a cover inner ring 101, the upper side of the inner cylinder 4 is provided with an upper cylinder ring 401, the lower side of the inner cylinder 4 is provided with a lower cylinder ring 403, and the inner cylinder 4 on the lower side of the upper cylinder ring 401 is provided There is a worm gear tooth 402 on the outer circle of the lower cylinder ring 403, a lower spring end hole 404 is opened in the lower cylinder ring 403, the upper end of the torsion spring 5 is the upper spigot 501, the lower end of the torsion spring 5 is the lower spigot 502, and the torsion spring 5 is located on the upper Between the barrel ring 401 and the lower barrel ring 403, the upper spigot end 501 is located inside the upper spring end hole 608, the lower spigot end 502 is located inside the lower spring end hole 404, there are two plane bearings 3, and the upper plane bearing 3 is located in Between the upper cylinder ring 401 and the elastic washer 2, the plane bearing 3 on the lower side is located between the lower cylinder ring 403 and the cylinder inner ring 610, the cover inner ring 101 is pressed above the elastic washer 2, and the elastic washer 2 eliminates the axis of the plane bearing 3 to the gap.

The upper cover 1 presses the elastic washer 2 to complete the fixation of the upper plane bearing 3. The inner cylinder 4 is sleeved with a torsion spring 5. The torsion spring 5 provides torsion force between the outer cylinder 6 and the inner cylinder 4, and the lower end of the torsion spring 5 enters the Inside the inner cylinder 4, the upper end of the torsion spring 5 enters the interior of the outer cylinder 6, a cylinder thread 601 is opened on the outer circle of the upper end of the outer cylinder 6, the outer cylinder 6 is an integral structure made of aluminum alloy, and the cylinder thread 601 engages with the cover thread 102 , the outer circumference of the outer cylinder 6 on the lower side of the cylinder thread 601 is provided with a wall frame 602 and a shaft wall block 605, a frame threaded hole 603 is opened on the end face of the wall frame 602, and a frame cavity 604 is opened in the wall frame 602. 604 is used to accommodate the supporting insert 7, the shaft wall block 605 is provided with a wall block cavity 606, and the end face of the shaft wall block 605 is provided with a circular array of clamping holes 607, and the positions of the clamping holes 607 and the top column 17 correspond. An upper spring end hole 608 and a vertical groove 609 are opened on the side wall of the outer cylinder 6 facing away from the wall frame 602 , and a cylinder inner ring 610 is provided on the lower edge of the outer cylinder 6 .

The drive assembly 200 includes a support block 7, the support block 7 is composed of a panel 701 and an embedded strip 703, the edge of the panel 701 has a plate edge hole 702, and the plate edge hole 702 cooperates with the countersunk head screw 12 to complete the support and embedding For the fixing of the block 7, the two ends of the embedded strip 703 are the strip end blocks 704. The strip end blocks 704 play a role in limiting the position of the panel 701. A block accommodating opening 705 is opened in the middle of the strip end block 704, and two sides of the embedded strip 703 are provided with The support block 706, the block inner hole 707 is opened in the support block 706, the block inner hole 707 is used to support the inner shaft 8, the middle of the support block 7 is an oil filling port 708, and the inner shaft 8 is located inside the block inner hole 707, The outer circumference of the rotating shaft 8 is provided with a shaft outer circular groove 801. The shaft outer circular groove 801 cooperates with the inner edge 902 of the cavity to transmit the torsion force on the worm 9 and the inner rotating shaft 8. The two sides of the inner rotating shaft 8 are provided with shaft spring grooves 802. The shaft spring grooves 802 is used to accommodate the circlip 10 to limit its axial position, the axis line of the inner shaft 8 is provided with a shaft hexagonal groove 803 and a shaft threaded hole 804, and the inner shaft 8 is sleeved with a worm 9, a circlip 10 and a rod end washer. 11. A rod cavity 901 is opened in the worm 9. The rod cavity 901 is provided with a cavity inner edge 902. The shaft spring groove 802 is fixed with a retaining spring 10. The cavity inner edge 902 is embedded in the shaft outer circular groove 801. One side is attached to the support block 706, the other side of the rod end washer 11 is attached to the end of the worm 9, the countersunk head screw 12 passes through the plate edge hole 702 into the frame threaded hole 603, and the embedded strip 703 enters the frame cavity Inside 604 , the injection port screw 14 passes through the oil seal gasket 13 and enters the oil injection port 708 . The outer circle of the shaft wall block 605 and the bolt head 1501 can be added with a scale to assist in determining the rotation angle of the inner cylinder 4 .

The adjustment assembly 300 includes the hand-tightening bolt 15 and its inner connecting bolt 18. The hand-tightening bolt 15 is composed of a coaxial bolt head 1501, a bolt section 1502, a bolt shaft 1504 and a hexagonal rod 1505. The bolt head 1501, the bolt section 1502, the bolt The axis lines of the shaft 1504 and the hexagonal rod 1505 coincide with each other. The connecting bolt 18 completes the connection between the inner rotating shaft 8 and the hand-tightening bolt 15. A section cavity 1503 is opened in the bolt section 1502, and a bolt channel 1506 is opened in the hand-tightening bolt 15. The cavity 1503 is provided with the spring 16 and the top post 17, the connecting bolt 18 is located inside the bolt channel 1506 and the shaft threaded hole 804, and the hexagonal rod 1505 is located inside the hexagonal groove 803 of the shaft. For torque transmission, the bolt shaft 1504 is located inside the wall block cavity 606, and the end of the top column 17 is provided with a bump, the bump corresponds to the outline of the clamping hole 607, and the convex block cooperates with the clamping hole 607 to allow the rotation of the hand-tightening bolt 15 to appear. sense.

In this micro-rotation angle adjustment device for the theodolite, the connecting bolt 18 is screwed into the shaft threaded hole 804 through the bolt channel 1506, thereby completing the fixing of the connecting bolt 18 and the inner rotating shaft 8, and the cooperation of the hexagonal rod 1505 and the shaft hexagonal groove 803 allows The torque of the hand-tightening bolt 15 can be transmitted to the inner shaft 8, the rod end washer 11 eliminates the gap between the worm 9 and the bearing block 706, and the inner edge 902 of the cavity is embedded in the outer groove 801 of the shaft to realize the connection between the inner shaft 8 and the worm 9. Torque transmission, when the hand-tightening bolt 15 is in the rotating state, the bump at the end of the top post 17 will come out from the inside of the clamping hole 607, and the cooperation between the convex block and the clamping hole 607 will make the rotation of the hand-tightening bolt 15 appear paragraph feeling, hand-tightening The rotation of the pin 15 achieves the rotation of the worm 9 .

When the worm 9 is in the rotating state, it will drive the inner cylinder 4 to rotate through the worm gear teeth 402 meshed with it, thereby realizing the angle adjustment between the outer cylinder 6 and the inner cylinder 4, and the plane bearing 3 reduces the distance between the inner cylinder 4 and the outer cylinder 6. Rotation resistance, when the inner cylinder 4 and the outer cylinder 6 rotate, they will overcome the torsion force acting on the inner cylinder 4 and the outer cylinder 6 by the torsion spring 5, and eliminate the meshing gap between the worm 9 and the worm gear teeth 402 through the reaction force of the torsion spring 5.

When the rod end washer 11 needs to be repaired after excessive wear, first remove the connecting bolt 18, then pull out the whole hand screw bolt 15 from the wall block cavity 606 and the shaft hexagonal groove 803, and remove the countersunk head screw 12. The bearing insert 7 and its inner inner shaft 8, worm 9, circlip 10, rod end washer 11, oil seal gasket 13 and nozzle screw 14 are removed together, and the circlip 10 restricts the axial movement of the inner shaft 8 , after the circlip 10 is removed, the inner shaft 8 can be removed to replace the excessively worn rod end washer 11, and then the drive assembly 200 can be assembled back in the reverse direction of the above process, and the worm 9 and the worm gear teeth 402 need to be lubricated during use. , remove the injection port screw 14 through the oil injection port 708 through the oil gun to spray and lubricate the worm 9.

The above are only the preferred specific embodiments of the invention, but the protection scope of the invention is not limited to this. Equivalent replacements or changes should be included within the protection scope of the invention.

Claims (10)

1. A micro-rotation angle adjusting device for theodolite, comprising a rotating assembly (100) and a driving assembly (200) and an adjusting assembly (300) arranged on the upper side, characterized in that:

the rotating assembly (100) comprises an outer barrel (6) and an inner barrel (4) which is rotatably connected with the outer barrel through a plane bearing (3) in the outer barrel, an upper cover (1) is arranged above the outer barrel (6), an elastic washer (2) is arranged between the upper cover (1) and the plane bearing (3) on the upper side, a torsion spring (5) is sleeved outside the inner barrel (4), the lower end of the torsion spring (5) enters the inner barrel (4), and the upper end of the torsion spring (5) enters the inner barrel (6);

the outer circle of the upper end of the outer barrel (6) is provided with a barrel thread (601), the outer circle of the outer barrel (6) on the lower side of the barrel thread (601) is provided with a wall frame (602) and a shaft wall block (605), the end face of the wall frame (602) is provided with a frame thread hole (603), the wall frame (602) is internally provided with a frame cavity (604), the shaft wall block (605) is internally provided with a wall block cavity (606), the end face of the shaft wall block (605) is provided with clamping holes (607) distributed in an annular array manner, the side wall of the outer barrel (6) back to the wall frame (602) is provided with an upper spring end hole (608) and a vertical groove (609), and the lower edge of the outer barrel (6) is provided with a barrel inner ring (610);

The driving assembly (200) comprises a bearing insert (7), the bearing insert (7) is composed of an embedded plate (701) and an embedded strip (703), a plate edge hole (702) is formed in the edge of the embedded plate (701), strip end blocks (704) are arranged at two ends of the embedded strip (703), a block accommodating opening (705) is formed in the middle of each strip end block (704), bearing blocks (706) are arranged at two sides of the embedded strip (703), block inner holes (707) are formed in the bearing blocks (706), and oil filling openings (708) are formed in the middle of the bearing insert (7);

an inner rotating shaft (8) is arranged in the block inner hole (707), an outer shaft circular groove (801) is formed in the outer circle of the inner rotating shaft (8), shaft spring grooves (802) are formed in two sides of the inner rotating shaft (8), a shaft hexagonal groove (803) and a shaft threaded hole (804) are formed in the axial lead of the inner rotating shaft (8), a worm (9), a clamp spring (10) and a rod end gasket (11) are sleeved outside the inner rotating shaft (8), a rod cavity (901) is formed in the worm (9), and an inner cavity edge (902) is formed in the rod cavity (901);

the adjusting assembly (300) comprises a hand-screwed bolt (15) and a connecting bolt (18) inside the hand-screwed bolt (15), wherein the hand-screwed bolt (15) is composed of a bolt head (1501), a bolt joint (1502), a bolt shaft (1504) and a hexagonal rod (1505) which are coaxial, a joint cavity (1503) is formed in the bolt joint (1502), a bolt channel (1506) is formed in the hand-screwed bolt (15), and a spring (16) and a top column (17) are arranged in the joint cavity (1503).

2. A fine turning angle adjusting device for theodolite according to claim 1, characterized in that: the inner wall of the upper cover (1) is provided with cover threads (102), and the upper edge of the upper cover (1) is provided with a cover inner ring (101);

an upper cylinder ring (401) is arranged on the upper side of the inner cylinder (4), a lower cylinder ring (403) is arranged on the lower side of the inner cylinder (4), worm gear teeth (402) are formed in the outer circle of the inner cylinder (4) on the lower side of the upper cylinder ring (401), and a lower spring end hole (404) is formed in the lower cylinder ring (403);

the upper end of the torsion spring (5) is an upper inserting end (501), and the lower end of the torsion spring (5) is a lower inserting end (502).

3. A fine turning angle adjusting device for theodolite according to claim 2, characterized in that: the torsion spring (5) is located between the upper barrel coil (401) and the lower barrel coil (403), the upper plug end (501) is located inside the upper spring end hole (608), and the lower plug end (502) is located inside the lower spring end hole (404).

4. A fine turning angle adjusting device for theodolite according to claim 3, characterized in that: the two plane bearings (3) are arranged, the plane bearing (3) on the upper side is positioned between the upper cylinder ring (401) and the elastic gasket (2), the plane bearing (3) on the lower side is positioned between the lower cylinder ring (403) and the cylinder inner ring (610), and the cover inner ring (101) is pressed above the elastic gasket (2).

5. The fine turning angle adjusting device for theodolite according to claim 4, wherein: the shaft spring groove (802) is internally fixed with a clamp spring (10), an inner ridge (902) of the cavity is embedded into the outer circular groove (801), one side of the rod end gasket (11) is attached to the bearing block (706), and the other side of the rod end gasket (11) is attached to the end of the worm (9).

6. A fine turning angle adjusting device for theodolite according to claim 5, characterized in that: countersunk head screws (12) entering the frame threaded holes (603) are arranged in the plate edge holes (702), and the embedded strips (703) enter the frame cavity (604).

7. A fine turning angle adjusting device for theodolite according to claim 6, characterized in that: an oil filling screw (14) is arranged in the oil filling port (708), and an oil seal gasket (13) is arranged between the oil filling port (708) and the oil filling port (14).

8. A fine turning angle adjusting device for theodolite according to claim 7, characterized in that: the connecting bolt (18) is located inside the keyway (1506) and the shaft threaded bore (804), and the hex bar (1505) is located inside the shaft hex slot (803).

9. A fine turning angle adjusting device for theodolite according to claim 8, characterized in that: the latch shaft (1504) is located inside a wall block cavity (606).

10. A fine turning angle adjusting device for theodolite according to claim 9, characterized in that: the end part of the top column (17) is provided with a convex block, and the convex block corresponds to the outline of the clamping hole (607).

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