CN110985646A

CN110985646A - Worm wheel and worm clearance eliminating mechanism

Info

Publication number: CN110985646A
Application number: CN201911420008.2A
Authority: CN
Inventors: 谢先运; 刘晨
Original assignee: Beijing Kxwell Technology Co ltd
Current assignee: Beijing Kxwell Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-10
Anticipated expiration: 2039-12-31
Also published as: CN110985646B

Abstract

The invention discloses a worm and gear clearance eliminating mechanism which comprises a worm shaft, a worm gear and a worm fixing support, wherein the worm is positioned on the surface of the worm shaft and fixedly sleeved by pins, the worm gear is meshed with the worm, a first bearing and a second bearing which can be arranged in a heat dissipation manner are fixedly sleeved at two ends of one section of the worm positioned in the worm fixing support, a sealing cover is arranged outside one end of the worm fixing support positioned on the first bearing, a transmission disc is arranged at the other end of the worm fixing support, a top seat is arranged in one end of the transmission disc, a groove is formed in one side of the top seat, a waveform elastic gasket is arranged between the top seat and the second bearing, and a positioning spring is sleeved on the surface of the positioning column. The positioning spring and the wave-shaped elastic gasket are arranged, so that the clearance between the worm wheel and the worm is eliminated, the service life of the worm wheel and the worm is prolonged, and the phenomenon that the second bearing generates larger friction force to influence the rotation of the worm shaft is avoided.

Description

Worm wheel and worm clearance eliminating mechanism

Technical Field

The invention relates to the technical field of photographic equipment, in particular to a worm and gear clearance eliminating mechanism.

Background

The word photography is from greek, and the two characters together mean "drawing with light". Photography refers to the process of recording images using a special device, and generally, a mechanical camera or a digital camera is used for photography. Photography is sometimes referred to as photography, the process of exposing a photosensitive medium to light emitted or reflected by an object. A word of profound language has been spoken: the photographer's ability to convert the trivial thing that is about to die in everyday life into an immortal visual image.

The whole process of making a video recording needs to be accomplished to the equipment that needs to use more in the photographic process, wherein mostly need to use worm gear structure in the pivoted equipment, however worm gear mechanism in the use, can produce the axial clearance, cause wearing and tearing between the worm gear, gear anti-backlash mechanism on the market at present has a lot of, for example very common anti-backlash gear on the market, two half formula gear mechanisms are adopted to this kind of mechanism mostly, however, two half formula gear cooperation extension springs realize the gear dislocation, reach anti-backlash effect, but this kind of mechanism has the requirement to the size of gear, too little gear can not add this kind of mechanism, and because this kind of mechanism is more complicated, therefore the cost is higher, and the installation degree of difficulty is higher.

Therefore, it is necessary to provide a worm and gear backlash eliminating mechanism to solve the above problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a worm and gear clearance eliminating mechanism, which is beneficial to eliminating the clearance between a worm and a gear, prolonging the service life of the worm and gear and preventing a second bearing from generating larger friction force to influence the rotation of a worm shaft by arranging a positioning spring and a waveform elastic gasket so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a worm and gear clearance eliminating mechanism comprises a worm shaft, a worm wheel and a worm fixing support, wherein the worm is positioned on the surface of the worm shaft and fixedly sleeved by pins, the worm wheel is meshed with the worm, a first bearing and a second bearing which can be arranged in a heat dissipation manner are fixedly sleeved at two ends of one section of the worm positioned in the worm fixing support, a sealing cover is arranged outside one end of the worm fixing support positioned on the first bearing, a transmission disc is arranged at the other end of the worm fixing support, a top seat is arranged in one end of the transmission disc, a groove is formed in one side, close to the worm shaft, of the top seat, a clearance is formed between one end in the groove and the worm shaft, a positioning column is fixedly connected with the other end of the top seat, a waveform elastic gasket is arranged between the top seat and the second bearing, a positioning spring is sleeved on the surface of the positioning column, and, and first spring holder and second spring holder horizontal parallel arrangement, be connected with the locating lever between first spring holder and the second spring holder, the activity is pegged graft between the locating lever both ends and is had the slide bar, be provided with the location arch between footstock and the first spring holder, first spring holder one side seted up with the protruding assorted constant head tank in location, but second spring holder one side is provided with the seal post of adjusting position.

Preferably, the positions, located at the top and the bottom of the sealing column, inside the worm fixing support are provided with sliding grooves, the sliding grooves are connected with screw rods in a rotating mode, sliding blocks are sleeved on the surface of each screw rod in a threaded mode, and the sliding blocks are fixedly connected with the surface of the sealing column.

Preferably, the transmission disc is hollow, the two lead screws movably penetrate through two side walls of the transmission disc and extend to the inner hexagonal nut sleeve fixedly connected to the other side of the transmission disc, the machine transmission wheels are sleeved on one section of the surface, located inside the transmission disc, of each lead screw, and a transmission belt is connected between the two transmission wheels.

Preferably, the outer diameter of the first bearing is larger than that of the second bearing, and the inner diameter of the worm fixing bracket at one end of the first bearing is larger than that at the other end of the first bearing.

Preferably, first bearing and second bearing all include bearing inner race, bearing inner race and ball, the spacing groove has been seted up between the bearing inner race surface both ends, the both ends inner wall of worm fixed bolster advance be provided with spacing groove assorted spacing arch, the radiating groove has all been seted up to the spacing groove both sides, the radiating groove both ends all communicate with each other with the spacing inslot portion.

Preferably, the surface between the sealing cover and the worm is fixed is provided with heat dissipation holes, and the positions of the heat dissipation holes formed in the surface of the sealing cover are matched with the positions of the limiting grooves.

Preferably, the inner diameter of the groove on one side of the top seat is smaller than the inner diameter of the bearing outer ring of the second bearing and larger than the outer diameter of the bearing inner ring of the second bearing, the outer diameter of the wave-shaped elastic gasket is equal to the outer diameter of the second bearing, and the inner diameter of the wave-shaped elastic gasket is smaller than the inner diameter of the bearing outer ring of the second bearing and larger than the outer diameter of the bearing inner ring of the second bearing.

Preferably, the positioning column is located at the center of one side of the top seat, and is arranged between the positioning column and the first spring seat by adopting a precision matching part, and the center line of the top seat is arranged at the same position as the center line of the worm shaft.

Preferably, the inner diameter of the two ends of the worm fixing support is respectively matched with the outer diameter of the first bearing and the outer diameter of the second bearing, and the first bearing and the second bearing are arranged in parallel.

The invention has the technical effects and advantages that:

1. the positioning spring and the wave-shaped elastic gasket are arranged, so that the positioning spring and the wave-shaped elastic gasket are favorable for applying thrust to the worm shaft and the second bearing respectively, the gap between the worm wheel and the worm is eliminated, the service life of the worm wheel and the worm is prolonged, and the thrust borne by the second bearing is shared through the positioning spring, so that the larger friction force generated between the second bearings is prevented from influencing the rotation of the worm shaft.

2. The invention is beneficial to changing the position of the positioning spring through the sealing column by arranging the sealing column, so that the footstock applies larger pressure to the worm wheel shaft, and the clearance generated again after the worm and gear are used for a long time is eliminated, thereby prolonging the service life of the worm and gear, reducing the frequency of replacing the waveform elastic gasket, and preventing the clearance error generated by frequent disassembly of the worm and gear.

Drawings

FIG. 1 is an exploded view of an overall portion of the structure of the present invention;

FIG. 2 is a cross-sectional view of the overall construction of the present invention;

FIG. 3 is a schematic view of the structure of part A in FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the structure of part B in FIG. 2 according to the present invention;

FIG. 5 is a schematic view of the structure of the portion C in FIG. 2 according to the present invention;

FIG. 6 is a schematic view of the structure of portion D of FIG. 2 according to the present invention;

FIG. 7 is a top view of the bearing cup structure of the present invention.

In the figure: 1. a worm shaft; 2. a worm; 3. a worm gear; 4. a worm fixing bracket; 5. a first bearing; 6. a second bearing; 7. sealing the cover; 8. a drive plate; 9. a top seat; 10. a groove; 11. a positioning column; 12. a wave-shaped elastic pad; 13. a positioning spring; 14. a first spring seat; 15. a second spring seat; 16. positioning a rod; 17. a slide bar; 18. positioning the projection; 19. positioning a groove; 20. sealing the column; 21. a chute; 22. a screw rod; 23. a slider; 24. an inner hexagonal nut sleeve; 25. a driving wheel; 26. a transmission belt; 27. a bearing inner race; 28. a bearing outer race; 29. a ball bearing; 30. a limiting groove; 31. a limiting bulge; 32. a heat sink; 33. and (4) heat dissipation holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the worm and gear clearance eliminating mechanism shown in fig. 1-7 comprises a worm shaft 1, a worm 2, a worm wheel 3 and a worm fixing support 4, wherein the worm 2 is positioned on the surface of the worm shaft 1 and fixedly sleeved by pins, the worm wheel 3 is meshed with the worm 2, a first bearing 5 and a second bearing 6 which can be arranged in a heat dissipation manner are fixedly sleeved at two ends of one section of the worm 2 positioned in the worm fixing support 4, a sealing cover 7 is arranged outside one end of the worm fixing support 4 positioned in the first bearing 5, a transmission disc 8 is arranged at the other end of the worm fixing support 4, a top seat 9 is arranged inside one end of the transmission disc 8, a groove 10 is formed in one side of the top seat 9 close to the worm shaft 1, a clearance is formed between one end of the groove 10 and the worm shaft 1, and the action force can be applied to a waveform elastic gasket 12 between the top seat 9 and the second bearing 6 firstly, after the worm shaft 1 and the top seat 9 are compressed to a certain degree, the worm shaft 1 and the top seat 9 are in contact stress, so that a large pressure is prevented from being generated between the second bearings 6, a large friction is generated, the other end of the top seat 9 is fixedly connected with a positioning column 11, a wave-shaped elastic gasket 12 is arranged between the top seat 9 and the second bearings 6, a positioning spring 13 is sleeved on the surface of the positioning column 11, the positioning spring 13 and the wave-shaped elastic gasket 12 are arranged, so that the positioning spring 13 and the wave-shaped elastic gasket 12 are beneficial to exerting thrust on the worm shaft 1 and the second bearings 6 respectively, a gap between the worm wheel 3 and the worm 2 is eliminated, the service life of the worm wheel 3 and the worm 2 is prolonged, the thrust received by the second bearings 6 is shared through the positioning spring 13, a large friction force is prevented from being generated between the second bearings 6, the rotation of the worm shaft, the first spring seat 14 and the second spring seat 15 are horizontally arranged in parallel, a positioning rod 16 is connected between the first spring seat 14 and the second spring seat 15, the positioning rod 16 is arranged, so that the positioning spring 13 is prevented from deflecting during compression and uneven stress is caused, a sliding rod 17 is movably inserted between two ends of the positioning rod 16, a positioning bulge 18 is arranged between the top seat 9 and the first spring seat 14, a positioning groove 19 matched with the positioning bulge 18 is formed in one side of the first spring seat 14, the position of the first spring plate is limited through the positioning bulge 18 and the positioning groove 19, large errors and uneven stress caused by installation are prevented, and a position-adjustable sealing column 20 is arranged on one side of the second spring seat 15.

Further, in the above technical solution, the positions of the inside of the worm fixing support 4, which are located at the top and the bottom of the seal post 20, are both provided with sliding grooves 21, the inside of the sliding grooves 21 is rotatably connected with a screw rod 22, the surface of the screw rod 22 is in threaded sleeve connection with sliding blocks 23, and both the sliding blocks 23 are fixedly connected with the surface of the seal post 20;

further, in the above technical solution, the inside of the transmission disc 8 is hollow, the two lead screws 22 both movably penetrate through two side walls of the transmission disc 8 and extend to the other side to be fixedly connected with the hexagon socket nut sleeve 24, a section of the surface of the two lead screws 22 inside the transmission disc 8 is sleeved with the machine transmission wheel 25, and a transmission belt 26 is connected between the two transmission wheels 25, which is beneficial to changing the position of the positioning spring 13 through the seal column 20, so that the footstock 9 applies greater pressure to the worm wheel 3 shaft, thereby eliminating the clearance generated again after the worm wheel 3 and the worm 2 are used for a long time, so as to increase the service life of the worm wheel 3 and the worm 2, reduce the frequency of replacing the waveform elastic gasket 12, and prevent the worm wheel 3 and the worm 2 from generating clearance errors due to frequent;

further, in the above technical solution, the outer diameter of the first bearing 5 is larger than the outer diameter of the second bearing 6, and the inner diameter of the worm fixing bracket 4 at one end of the first bearing 5 is larger than the inner diameter of the other end;

further, in the above technical solution, the first bearing 5 and the second bearing 6 both include a bearing inner ring 27, a bearing outer ring 28 and balls 29, a limit groove 30 is provided between two ends of the surface of the bearing outer ring 28, a limit protrusion 31 matched with the limit groove 30 is further provided on the inner wall of each of two ends of the worm fixing bracket 4, so that the limit protrusion 31 and the limit groove 30 can limit the positions of the first bearing 5 and the second bearing 6 to prevent the bearing outer ring 28 from rotating, heat dissipation grooves 32 are provided on two sides of the limit groove 30, two ends of the heat dissipation groove 32 are communicated with the inside of the limit groove 30, and the heat dissipation grooves 32 can facilitate the generation of air flow during the rotation of the worm shaft 1, flow and dissipate heat through the heat dissipation grooves 32 and the positioning grooves 19, and increase the heat transfer efficiency;

further, in the above technical solution, heat dissipation holes 33 are formed in the surfaces between the sealing cover 7 and the worm 2, and the positions of the heat dissipation holes 33 formed in the surface of the sealing cover 7 are matched with the positions of the limiting grooves 30, so as to facilitate the generation of air flow to dissipate heat of the first bearing 5 and the second bearing 6;

further, in the above technical solution, the inner diameter of the groove 10 on the top seat 9 side is smaller than the inner diameter of the bearing outer ring 28 of the second bearing 6 and larger than the outer diameter of the bearing inner ring 27 of the second bearing 6, the outer diameter of the wave-shaped elastic gasket 12 is equal to the outer diameter of the second bearing 6, the inner diameter of the wave-shaped elastic gasket 12 is smaller than the inner diameter of the bearing outer ring 28 of the second bearing 6 and larger than the outer diameter of the bearing inner ring 27 of the second bearing 6, which is beneficial to preventing friction with the bearing inner ring 27;

further, in the above technical solution, the positioning column 11 is located at the center of one side of the top seat 9, and is arranged with the first spring seat 14 by using a precision matching part, and the center line of the top seat 9 is arranged at the same position as the center line of the worm shaft 1, so as to prevent the generation of a gap and the resulting uneven stress;

further, in the above technical solution, the inner diameter sizes of the two ends of the worm fixing bracket 4 are respectively matched with the outer diameter sizes of the first bearing 5 and the second bearing 6, and the first bearing 5 and the second bearing 6 are arranged in parallel to ensure the level of the worm shaft 1.

The working principle of the invention is as follows:

referring to fig. 1 to 7 of the specification, when the worm wheel 3 and the worm 2 are used, one end of the worm shaft 1 having the worm 2 fitted therein is inserted into the space between the worm 2 and the worm 2, and the limit protrusion 31 is inserted into the limit groove 30 of the bearing outer race 28, and then one end having the second bearing 6 is inserted into the groove 10 of the top seat 9, and the corrugated elastic washer 12 is interposed therebetween, the worm shaft 1 is pushed, the worm shaft 1 and the top seat 9 compress the positioning spring 13, and then the cap 7 is fixed to one end of the worm fixing bracket 4 with a utility bolt, so that a thrust is applied to the second bearing 6 through the corrugated elastic washer 12 during the practical use of the worm wheel 3 and the worm 2, and after the corrugated elastic washer 12 is compressed to a certain extent, the thrust is simultaneously applied to the second bearing 6 and the worm shaft 1 through the corrugated elastic washer 12 and the positioning spring 13, thereby preventing the generation of axial clearance between the teeth of the worm 2 and the worm wheel 3, further enabling the structure between the worm wheel 3 and the worm 2 to be more compact, preventing the worm wheel 3 and the worm 2 from being damaged, increasing the use, and when the positioning spring 13 and the wave-shaped elastic gasket 12 are not enough to completely eliminate the clearance between the worm wheel 3 and the worm 2 after long-term use, using a hexagonal wrench to rotate the inner hexagonal nut sleeve 24 to enable the lead screw 22 to rotate, and the action of the driving wheel 25 and the driving belt 26 is small, enabling the two lead screws 22 to simultaneously rotate, thereby enabling the two sliding blocks 23 to drive the sealing column 20 to move towards the inside of the worm fixing bracket 4, further changing the position of the second spring seat 15, enabling the positioning spring 13 to push the top seat 9 to apply larger thrust to the worm shaft 1, further eliminating the clearance between the worm wheel 3 and the worm 2, further prolonging the service life of the worm wheel 3, prevent the worm wheel 3 and the worm 2 from generating clearance error due to frequent disassembly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a worm gear clearance mechanism that disappears, includes worm axle (1), worm (2), worm wheel (3) and worm fixed bolster (4), its characterized in that: the worm (2) is positioned on the surface of the worm shaft (1) and fixedly sleeved by a pin, the worm wheel (3) is meshed with the worm (2), a first bearing (5) and a second bearing (6) which can be arranged in a heat dissipation manner are fixedly sleeved at two ends of one section of the worm (2) positioned in the worm fixing support (4), a sealing cover (7) is arranged outside one end of the worm fixing support (4) positioned on the first bearing (5), a transmission disc (8) is arranged at the other end of the worm fixing support, a top seat (9) is arranged inside one end of the worm fixing support (4) positioned on the transmission disc (8), a groove (10) is formed in one side, close to the worm shaft (1), of the top seat (9), a gap is formed between one end of the inside of the groove (10) and the worm shaft (1), a positioning column (11) is fixedly connected with the other end of the top seat (9), and a waveform elastic gasket (12) is arranged between the top seat (, positioning spring (13) is sleeved on the surface of the positioning column (11), the positioning spring (13) comprises a first spring seat (14) and a second spring seat (15), the first spring seat (14) and the second spring seat (15) are horizontally arranged in parallel, a positioning rod (16) is connected between the first spring seat (14) and the second spring seat (15), a sliding rod (17) is movably inserted between two ends of the positioning rod (16), a positioning bulge (18) is arranged between the top seat (9) and the first spring seat (14), a positioning groove (19) matched with the positioning bulge (18) is formed in one side of the first spring seat (14), and a position-adjustable sealing column (20) is arranged on one side of the second spring seat (15).

2. The worm and gear backlash eliminating mechanism of claim 1, wherein: the inside position that is located seal post (20) top and bottom of worm fixed bolster (4) has all seted up spout (21), spout (21) inside rotation is connected with lead screw (22), lead screw (22) surface screw thread has cup jointed slider (23), two slider (23) all with seal post (20) fixed surface is connected.

3. The worm and gear backlash eliminating mechanism of claim 2, wherein: the transmission disc (8) is internally hollow, the two lead screws (22) penetrate through two side walls of the transmission disc (8) and extend to the inner hexagonal nut sleeve (24) fixedly connected with the other side, the two lead screws (22) are located on one section of the surface inside the transmission disc (8) and are sleeved with the transmission wheels (25), and a transmission belt (26) is connected between the transmission wheels (25).

4. The worm and gear backlash eliminating mechanism of claim 1, wherein: the outer diameter of the first bearing (5) is larger than that of the second bearing (6), and the inner diameter of one end, located on the first bearing (5), of the worm fixing support (4) is larger than that of the other end of the worm fixing support.

5. The worm and gear backlash eliminating mechanism of claim 1, wherein: first bearing (5) and second bearing (6) all include bearing inner race (27), bearing outer lane (28) and ball (29), spacing groove (30) have been seted up between bearing outer lane (28) surface both ends, the both ends inner wall of worm fixed bolster (4) advances to be provided with spacing groove (30) assorted spacing arch (31), radiating groove (32) have all been seted up to spacing groove (30) both sides, radiating groove (32) both ends all communicate with each other with spacing groove (30) inside.

6. The worm and gear backlash eliminating mechanism of claim 5, wherein: the surface has all seted up louvre (33) between closing cap (7) and worm (2) are fixed, louvre (33) position and spacing groove (30) position phase-match that closing cap (7) surface was seted up.

7. The worm and gear backlash eliminating mechanism of claim 5, wherein: the bearing structure is characterized in that the inner diameter of the groove (10) on one side of the top seat (9) is smaller than the inner diameter of the bearing outer ring (28) of the second bearing (6), and is larger than the outer diameter of the bearing inner ring (27) of the second bearing (6), the outer diameter of the wave-shaped elastic gasket (12) is equal to the outer diameter of the second bearing (6), the inner diameter of the wave-shaped elastic gasket (12) is smaller than the inner diameter of the bearing outer ring (28) of the second bearing (6), and is larger than the outer diameter of the bearing inner ring (27) of the second bearing (6).

8. The worm and gear backlash eliminating mechanism of claim 1, wherein: the positioning column (11) is located in the center of one side of the top seat (9), and is arranged between the positioning column and the first spring seat (14) through a precision matching part, and the center line of the top seat (9) and the center line of the worm shaft (1) are arranged in the same position.

9. The worm and gear backlash eliminating mechanism of claim 1, wherein: the inner diameter sizes of two ends of the worm fixing support (4) are respectively matched with the outer diameter sizes of the first bearing (5) and the second bearing (6), and the first bearing (5) and the second bearing (6) are arranged in parallel.