CN217152884U

CN217152884U - Anti-backlash gear

Info

Publication number: CN217152884U
Application number: CN202220914926.1U
Authority: CN
Inventors: 施永辉; 施佳鑫
Original assignee: Jinjiang City Huafeng Gear Manufacturing Co ltd
Current assignee: Jinjiang City Huafeng Gear Manufacturing Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-08-09
Anticipated expiration: 2032-04-20

Abstract

The utility model relates to the technical field of gears, in particular to an anti-backlash gear, which comprises a first gear and a second gear, wherein a shaft rod is fixedly arranged at the middle position of the first gear, the second gear is sleeved on the shaft rod, a buffer is uniformly embedded and installed at one side of the first gear, a limit ring is sleeved at one side of the second gear on the shaft rod, the other end of the shaft rod is in threaded connection with a fixed nut, one side of the fixed nut is tightly pressed with one side of the limit ring, by adopting a ball, when the utility model rotates at a high speed, the centrifugal force of the ball is utilized to push one end of the buffer, so that the buffer pushes a baffle plate, the first gear and the second gear are staggered, the buffering is convenient, a spring is avoided, when the anti-backlash gear is used for a long time, the metal fatigue is caused, the effect is reduced, and rubber blocks are arranged at the two inner sides of a gap through a sleeve ring and a fixed block, the rubber block applies corresponding elasticity to the fixed block, so that the gap eliminating effect is further improved, and the use is convenient.

Description

Anti-backlash gear

Technical Field

The utility model relates to the technical field of gears, especially, relate to anti-backlash gear.

Background

The gears should be engaged without backlash, but in practice, in order to compensate for dimensional changes caused by machining, installation errors and temperature changes to prevent the gears from being stuck, certain backlash must be left on the non-working surfaces of the teeth, and the gear transmission mechanism has backlash which is used for preventing the teeth from being stuck due to errors and thermal deformation and leaving space for a lubricating oil film between the tooth surfaces, but the backlash simultaneously causes backlash when the mechanism rotates reversely, so that the mechanism cannot be accurately positioned.

The anti-backlash gear belongs to automatic compensation type mechanical anti-backlash, generally refers to double-plate thin gears which are anti-backlash through the staggered teeth of a spring anti-backlash gear, and is characterized by transmission, simple structure and economy. The backlash eliminating gear transmission is to eliminate the backlash in gear transmission, and has driven gear of one pair of gears made into two sheets, one of which is fixed on the shaft and the other one is set on the hub of the gear, two thin gears with lugs on which one end of a tension spring is hooked and the other end is hooked and fixed screw, and nut for regulating the screw length and locking, and this structure has tension of the tension spring to make the left side of the tooth of one thin gear and the right side of the tooth of the other thin gear cling to the left and right sides of the tooth space of the driving gear separately, so that the backlash eliminating structure can eliminate the backlash and no backlash error in reverse direction, and the backlash eliminating gear tension spring has the effect of limiting the tension force produced by the tension spring in the backlash eliminating structure to make the driving gear and the driven gear cling to each other in forward and reverse rotation, and the position of the backlash eliminating tension spring in the structure is limited in one annular area, and the part to which the tension spring is fixed is also in this annular region, so that the above requirements must be met in the design. In addition, the strength of the tension spring is one of the important conditions for ensuring the mechanism to stably run for a long time, but when the tension spring is used for pulling, the spring is often failed due to temperature or metal fatigue during long-term use, so that the backlash effect in the backlash eliminating gear is reduced, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

For the technical defect who overcomes prior art existence, the utility model provides an anti-backlash gear avoids when using for a long time, leads to anti-backlash effect to reduce.

The utility model discloses a technical solution be: the anti-backlash gear comprises a first gear and a second gear, wherein a shaft rod is fixedly arranged at the middle position of the first gear, the second gear is sleeved on the shaft rod, the outer diameter of the first gear is the same as that of the second gear, the number of teeth of the first gear is the same as that of the second gear, the second gear is convenient to mount, a buffer part is uniformly embedded and mounted on one side of the first gear, the second gear is convenient to push through the buffer part when the anti-backlash gear is used, so that the first gear and the second gear are in a staggered tooth structure, a baffle is uniformly and fixedly mounted on one side of the second gear, one side of the baffle is attached to one side of the buffer part, the buffer part is convenient to push the second gear through the baffle plate, and the first gear and the second gear are in staggered teeth, a limiting ring is sleeved on one side of the shaft lever, the limiting ring is attached to one side of the second gear, the second gear is further limited through the limiting ring, elasticity is provided for the second gear, the first gear and the second gear are convenient to perform staggered teeth, and a gap eliminating effect is achieved, a limiting groove is uniformly formed in the outer side of one end of the shaft lever, a limiting block is uniformly and fixedly mounted on the inner side of the limiting ring, the limiting block is clamped in the limiting groove, when the limiting ring is mounted, the limiting block is clamped in the limiting groove, the limiting block prevents the limiting ring from rotating on the shaft lever, the limiting ring is convenient to mount, the stability after mounting is improved, and a notch is uniformly formed in one side of the limiting ring, rubber blocks are fixedly arranged on two sides of the inside of the notch, so that elasticity is conveniently provided for the second gear, the first gear and the second gear are conveniently subjected to staggered teeth, gaps are conveniently eliminated, metal fatigue is avoided from being caused when the gear is used for a long time, the gap eliminating effect is influenced, a lantern ring is fixedly arranged on one side of the second gear, the second gear is conveniently sleeved on the limiting ring, fixing blocks are uniformly and fixedly arranged in the lantern ring and are clamped in the notch, the fixing blocks are positioned among the rubber blocks, the elasticity on the rubber blocks is applied to the second gear through the fixing blocks, the gaps are conveniently eliminated, the other end of the shaft rod is connected with a fixing nut in a threaded manner, one side of the fixing nut is tightly pressed with one side of the limiting ring, through fixation nut, be convenient for will drive the second gear with first gear looks fixed connection is convenient for assemble, the thread groove has evenly been seted up to the one end of axostylus axostyle, just fixation nut threaded connection is in inside the thread groove on the axostylus axostyle, conveniently will fixation nut with axostylus axostyle looks fixed connection.

Preferably, one side of the first gear is uniformly provided with a groove with an L-shaped structure, the buffer member is embedded and installed in the groove, so that the buffer member can be conveniently installed, one end of the baffle extends to the inside of the groove and is attached to one side of the buffer member, a ball is placed at the lower end of the inside of the groove, one side of the ball is attached to the other side of the buffer member, when the utility model is rotated at a high speed, the ball is subjected to a larger centrifugal force, so that the ball pushes the buffer member, the buffer member applies an elastic force to the baffle plate, the buffer member comprises a shell, the shell is of an L-shaped structure, a first piston rod and a second piston rod are respectively inserted into two ends of the shell, and the other ends of the first piston rod and the second piston rod extend to the outside of the shell, the other end of the first piston rod is in contact with the baffle, the other end of the second piston rod is in contact with the ball, filling liquid is filled between the first piston rod and the second piston rod in the shell, and when the ball pushes the second piston rod, the filling liquid in the shell moves in the direction of the first piston rod, so that one end of the first piston rod is extruded conveniently, the baffle is pushed by the first piston rod, the second gear is pushed by the baffle to rotate, a staggered tooth effect is generated between the second gear and the first gear, and gaps are eliminated conveniently.

The beneficial effects of the utility model are that: the utility model discloses an adopt the ball, work as the utility model discloses when rotating at a high speed, utilize the centrifugal force of ball to promote the one end of bolster, and then make the bolster promote the baffle for first gear and second gear dislocation mutually, and be convenient for cushion, avoid using the spring, when using for a long time, lead to metal fatigue, lead to the effect to reduce, and through the lantern ring and fixed block, install the block rubber in the inside both sides of breach, make the block rubber exert corresponding elasticity to the fixed block, further improve the crack effect that disappears, facilitate the use.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the structure explosion of the present invention.

Fig. 3 is a schematic diagram of the structure explosion at another angle of the present invention.

Fig. 4 is the structure schematic diagram after the side cut of the middle buffer member of the present invention.

Description of reference numerals: in the figure: 1. a first gear; 2. a second gear; 3. a shaft lever; 4. a buffer member; 41. a housing; 42. a first piston rod; 43. a second piston rod; 44. filling liquid; 5. a baffle plate; 6. a limiting ring; 7. fixing a nut; 8. a groove; 9. a ball bearing; 10. a limiting groove; 11. a limiting block; 12. a notch; 13. a rubber block; 14. a collar; 15. a fixed block; 16. a thread groove.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 to 4, the anti-backlash gear provided in this embodiment includes a first gear 1 and a second gear 2, a shaft rod 3 is fixedly installed at a middle position of the first gear 1, the second gear 2 is sleeved on the shaft rod 3, outer diameters of the first gear 1 and the second gear 2 are the same, and numbers of teeth of the first gear 1 and the second gear 2 are the same, so as to facilitate installation of the second gear 2, a buffer member 4 is uniformly embedded and installed on one side of the first gear 1, so that when the anti-backlash gear is used, the second gear 2 is pushed by the buffer member 4, so that the first gear 1 and the second gear 2 generate a staggered tooth structure, a baffle 5 is uniformly and fixedly installed on one side of the second gear 2, one side of the baffle 5 is attached to one side of the buffer member 4, so that the buffer member 4 pushes the second gear 2 by the baffle 5, so that the first gear 1 and the second gear 2 are staggered, one side that lies in second gear 2 on axostylus axostyle 3 has cup jointed spacing ring 6, and one side of spacing ring 6 laminates with one side of second gear 2 mutually, through spacing ring 6, just further carries on spacingly to second gear 2, provides elasticity to second gear 2, makes things convenient for first gear 1 and second gear 2 to carry out the wrong tooth, and then plays the gap elimination effect.

The outer side of one end of the shaft lever 3 is uniformly provided with a limiting groove 10, the inner side of the limiting ring 6 is uniformly and fixedly provided with a limiting block 11, the limiting block 11 is clamped in the limiting groove 10, and further when the limiting ring 6 is installed, the limiting block 11 is clamped in the limiting groove 10, so that the limiting block 11 prevents the limiting ring 6 from rotating on the shaft lever 3, the installation of the limiting ring 6 is convenient, and the stability after the installation is improved, one side of the limiting ring 6 is uniformly provided with a notch 12, both sides of the inner part of the notch 12 are both fixedly provided with rubber blocks 13, and the rubber blocks 13 are used for providing elasticity for the second gear 2, so that the first gear 1 and the second gear 2 are staggered, the gap elimination is convenient, the metal fatigue is avoided when the shaft lever is used for a long time, the gap elimination effect is influenced, one side of the second gear 2 is fixedly provided with a sleeve ring 14, the second gear 2 is convenient to be sleeved on the limiting ring 6, the even fixed mounting in inside of lantern ring 14 has fixed block 15, and fixed block 15 joint is in the inside of breach 12, and fixed block 15 is located between the block rubber 13, through fixed block 15 for elasticity on the block rubber 13 is applied to second gear 2 through fixed block 15 on, is convenient for carry out the anti-backlash and uses.

One side of the first gear 1 is uniformly provided with a groove 8 with an L-shaped structure, the buffer member 4 is embedded and installed inside the groove 8, the buffer member 4 is convenient to install, one end of the baffle 5 extends to the inside of the groove 8 and is jointed with one side of the buffer member 4, the lower end inside the groove 8 is provided with a ball 9, one side of the ball 9 is jointed with the other side of the buffer member 4, when the utility model is rotated at a high speed, the ball 9 is subjected to a larger centrifugal force, the ball 9 pushes the buffer member 4, the buffer member 4 exerts elastic force on the baffle 5, the buffer member 4 comprises a shell 41, the shell 41 is in an L-shaped structure, the two ends inside the shell 41 are respectively inserted with a first piston rod 42 and a second piston rod 43, the other ends of the first piston rod 42 and the second piston rod 43 extend to the outside of the shell 41, and the other end of the first piston rod 42 is contacted with the baffle 5, the other end of the second piston rod 43 contacts with the ball 9, and the inside of the housing 41 is located between the first piston rod 42 and the second piston rod 43 and is filled with the filling liquid 44, so that when the ball 9 pushes the second piston rod 43, the filling liquid 44 inside the housing 41 moves in the direction of the first piston rod 42, so as to extrude one end of the first piston rod 42, so that the first piston rod 42 pushes the baffle 5, so that the baffle 5 pushes the second gear 2 to rotate, so as to generate the staggered tooth effect between the second gear 2 and the first gear 1, so as to facilitate gap elimination, the other end of the shaft rod 3 is in threaded connection with the fixing nut 7, one side of the fixing nut 7 is pressed against one side of the spacing ring 6, through the fixing nut 7, the second gear 2 is conveniently and fixedly connected with the first gear 1, so as to facilitate assembly, one end of the shaft rod 3 is uniformly provided with the thread groove 16, and the fixing nut 7 is in threaded connection with the thread groove 16 on the shaft rod 3, the fixing nut 7 and the shaft lever 3 are conveniently and fixedly connected.

Having shown and described the fundamental principles and the principal features of the invention and its advantages, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. The anti-backlash gear is characterized in that: comprises a first gear (1) and a second gear (2), wherein a shaft lever (3) is fixedly arranged at the middle position of the first gear (1), the second gear (2) is sleeved on the shaft lever (3), one side of the first gear (1) is uniformly embedded with a buffer piece (4), and one side of the second gear (2) is uniformly and fixedly provided with a baffle (5), one side of the baffle (5) is jointed with one side of the buffer piece (4), a limit ring (6) is sleeved on one side of the shaft lever (3) which is positioned on the second gear (2), and one side of the limit ring (6) is jointed with one side of the second gear (2), the other end of the shaft lever (3) is in threaded connection with a fixing nut (7), and one side of the fixing nut (7) is tightly pressed with one side of the limiting ring (6).

2. The anti-backlash gear according to claim 1, wherein: recess (8) of L type structure are evenly seted up to one side of first gear (1), just install bolster (4) are inlayed the inside of recess (8), the one end of baffle (5) extends to the inside of recess (8) with one side of bolster (4) is laminated mutually, just ball (9) have been placed to the inside lower extreme of recess (8), one side of ball (9) with the opposite side of bolster (4) is laminated mutually.

3. The anti-backlash gear according to claim 2, wherein: buffer member (4) include casing (41), just casing (41) are L type structure, the inside both ends of casing (41) are pegged graft respectively and are had first piston rod (42) and second piston rod (43), just first piston rod (42) with the other end of second piston rod (43) all extends to the outside of casing (41), the other end of first piston rod (42) with baffle (5) contact, the other end of second piston rod (43) with ball (9) contact, just the inside of casing (41) is located first piston rod (42) with it has filling liquid (44) to fill between second piston rod (43).

4. The anti-backlash gear according to claim 1, wherein: limiting grooves (10) are uniformly formed in the outer side of one end of the shaft rod (3), limiting blocks (11) are uniformly and fixedly mounted on the inner side of the limiting ring (6), and the limiting blocks (11) are clamped inside the limiting grooves (10).

5. The anti-backlash gear according to claim 1, wherein: breach (12) are evenly seted up to one side of spacing ring (6), the equal fixed mounting in inside both sides of breach (12) has block rubber (13), just one side fixed mounting of second gear (2) has the lantern ring (14), the even fixed mounting in inside of the lantern ring (14) has fixed block (15), just fixed block (15) joint is in the inside of breach (12), fixed block (15) are located between block rubber (13).

6. The anti-backlash gear according to claim 1, wherein: thread grooves (16) are uniformly formed in one end of the shaft rod (3), and the fixing nut (7) is in threaded connection with the inside of the thread grooves (16) in the shaft rod (3).

7. The anti-backlash gear according to claim 1, wherein: the outer diameters of the first gear (1) and the second gear (2) are the same, and the number of teeth of the first gear (1) and the second gear (2) is the same.