CN213575369U

CN213575369U - Speed reducing structure for electric tool rest

Info

Publication number: CN213575369U
Application number: CN202022560071.0U
Authority: CN
Inventors: 杨伟光; 苗晓飞; 王新伟
Original assignee: Xuchang Zhengshu Cnc Technology Co ltd
Current assignee: Xuchang Zhengshu Cnc Technology Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-06-29
Anticipated expiration: 2030-11-06

Abstract

The utility model belongs to the technical field of speed reduction devices of electric tool rests, in particular to a speed reduction structure for an electric tool rest, which comprises a retainer and an eccentric shaft, the eccentric gear, ring gear and upper cover plate, the holder is equipped with first circular through-hole, the equipartition has two at least projections on the holder, the bottom of eccentric shaft rotates through first bearing and connects in first circular through-hole, the eccentric gear is equipped with the circular through-hole of second, the eccentric gear rotates through the second bearing and connects on the eccentric shaft, be equipped with oval through-hole on the eccentric gear, the outer circumference of following of eccentric gear is equipped with the round external tooth, the inner wall circumference of ring gear is equipped with the round internal tooth, the ring gear rotates through the third bearing and connects the outside at the holder, the upper cover plate is equipped with the circular through-hole of third, the bottom of upper cover plate is equipped with circular cavity, the upper cover plate rotates through the fourth bearing and connects in the ring gear, the upper cover plate rotates. The structure solves the difficulty that the electric tool rest is not provided with a direct-connection speed reducing mechanism.

Description

Speed reducing structure for electric tool rest

Technical Field

The utility model belongs to the technical field of the decelerator of electronic knife rest, specifically relate to a speed reduction structure for electronic knife rest.

Background

The existing electric tool rests on the market are connected with the fine positioning mechanism of the electric tool rest through a zero component after being decelerated through a deceleration mechanism, and the electric tool rest has the defects of complex structure, more required parts and higher later-stage failure rate.

Therefore, the speed reducing structure for the electric tool rest is designed, the speed reducing structure can be perfectly combined with the fine positioning mechanism of the electric tool rest, the connecting part of the speed reducing structure and the fine positioning mechanism is not required to be installed, the number of parts and the failure rate are effectively reduced, the rotating clearance and the self-locking force can be adjusted by changing the number of the swinging pieces through the speed reducing structure, the rotating clearance is greatly reduced, and the self-locking effect of the electric tool rest is improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems in the prior art, the present invention provides a speed reduction structure for an electric knife rest, comprising a holder, an eccentric shaft, a deflection gear, a gear ring and an upper cover plate, wherein the center of the holder is provided with a first circular through hole, the holder is provided with at least two protruding columns circumferentially and uniformly distributed along the center of the first circular through hole, the bottom of the eccentric shaft is rotatably connected in the first circular through hole of the holder through a first bearing, the top of the eccentric shaft is provided with a bayonet for clamping a motor output shaft, the center of the deflection gear is provided with a second circular through hole, a second bearing is arranged in the second circular through hole, the deflection gear is rotatably connected to an eccentric part on the eccentric shaft through a second bearing, the deflection gear is provided with an elliptical through hole matched with the protruding columns circumferentially around the second circular through hole, the outer circumference of following of beat gear is provided with the round external tooth, the inner wall circumference of ring gear is provided with the round internal tooth, and the internal tooth of ring gear and the external tooth intermeshing of beat gear, the ring gear passes through the third bearing and rotates the outside of connecting at the holder, the central point of upper cover plate puts and has seted up the third circular through-hole, the bottom of upper cover plate is equipped with the circular cavity that extends to enclose downwards, the outer wall of circular cavity is equipped with fourth bearing, inner wall and is equipped with the fifth bearing, the upper cover plate passes through the fourth bearing and rotates to be connected in the ring gear, and the upper cover plate passes through the fifth bearing and rotate the top of connecting at the eccentric shaft.

Preferably, the centers of circles of the first circular through hole, the gear ring and the third circular through hole are all located on the same axis, and the centers of circles of the second circular through hole and the eccentric portion of the eccentric shaft are located on the same axis.

Preferably, the external teeth of the yaw gear are smaller than the internal teeth of the ring gear.

Preferably, at least one deflection gear is rotatably connected to the eccentric shaft.

Preferably, the bottom of the gear ring is provided with at least two positioning claws.

The utility model discloses still including enabling the other subassemblies that a speed reduction structure for electronic knife rest normally used, be the conventional technological means in this field. In addition, the device or the component which is not limited in the utility model adopts the conventional technical means in the field.

The utility model discloses a theory of operation is: the reduction structure has the advantages that three convex columns are arranged on a retainer, two deflection gears are rotatably connected on an eccentric shaft, three oval through holes are formed in each deflection gear, three positioning claws are arranged at the bottom of a gear ring, an output shaft of a motor is fixedly connected to the top of the eccentric shaft, the gear ring is connected with the input end of an electric knife rest fine positioning mechanism as an output end, the motor drives the eccentric shaft to enable the two deflection gears to form circular track eccentric motion around the retainer, the gear ring is driven to realize speed reduction motion by a small-tooth-difference speed reduction principle, strong and accurate reverse resistance is formed due to the concentric and uniform circular arc design of the retainer by the three convex columns, three positioning claws corresponding to the electric knife rest fine positioning mechanism are designed at the bottom of the gear ring to enable the electric knife rest to be accurately positioned and reversely self-locked, and accordingly, the speed reduction structure has the, the torque is improved, and self-locking is carried out by utilizing a reverse power source.

The beneficial effects of the utility model are that, this structure has realized the smart positioning mechanism perfect adaptation with speed reduction structure and electric knife rest, need not to install speed reduction structure and smart positioning mechanism's adapting unit again, has effectively reduced spare part quantity and fault rate, and this speed reduction structure accessible change pendulum piece quantity adjusts gyration clearance and self-locking power, reduces the gyration clearance by a wide margin to electric knife rest's auto-lock effect has been promoted.

Drawings

The present invention will be further explained with reference to the drawings and examples.

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

Fig. 2 is a schematic structural diagram of the retainer of the present invention.

Fig. 3 is a sectional view taken along the line a-a in fig. 2.

Fig. 4 is a schematic structural diagram of the ring gear of the present invention.

Fig. 5 is a left side view of fig. 4.

Fig. 6 is a sectional view taken along line B-B in fig. 4.

Fig. 7 is a schematic structural view of the yaw gear of the present invention.

Fig. 8 is a schematic structural view of the eccentric shaft of the present invention.

Fig. 9 is a plan view of the eccentric shaft of the present invention.

Fig. 10 is a schematic structural view of the upper cover plate of the present invention.

Fig. 11 is a cross-sectional view taken along line C-C of fig. 10.

In the figure: 1. the eccentric shaft bearing comprises a retainer, 2 degrees of eccentric shaft, 3 degrees of deflection gear, 4 degrees of gear ring, 5 degrees of upper cover plate, 6 degrees of first circular through hole, 7 degrees of convex column, 8 degrees of first bearing, 9 degrees of bayonet, 10 degrees of second circular through hole, 11 degrees of second bearing, 12 degrees of elliptical through hole, 13 degrees of external tooth, 14 degrees of internal tooth, 15 degrees of third bearing, 16 degrees of third circular through hole, 17 degrees of fourth bearing, 18 degrees of fifth bearing, 19 degrees of positioning claw.

Detailed Description

The present invention will be described more clearly with reference to the accompanying drawings and specific embodiments in the embodiments of the present invention, and the description herein is only for explaining the present invention, but not for limiting the present invention. Based on the embodiments of the present invention, any modifications, equivalent replacements, improvements, etc. made by other embodiments obtained by those skilled in the art without creative efforts should be included in the protection scope of the present invention.

Examples

As shown in fig. 1 to 11, the utility model provides a speed reduction structure for an electric knife rest, which comprises a holder 1, an eccentric shaft 2, a deflection gear 3, a gear ring 4 and an upper cover plate 5, wherein the center of the holder 1 is provided with a first circular through hole 6, the holder 1 is provided with at least two protruding columns 7 along the center circumference of the first circular through hole 6, the bottom of the eccentric shaft 2 is rotatably connected in the first circular through hole 6 of the holder 1 through a first bearing 8, the top of the eccentric shaft 2 is provided with a bayonet 9 for clamping a motor output shaft, the center of the deflection gear 3 is provided with a second circular through hole 10, a second bearing 11 is arranged in the second circular through hole 10, the deflection gear 3 is rotatably connected to the eccentric part of the eccentric shaft 2 through a second bearing 11, the deflection gear 3 is provided with an oval through hole 12 matched with the protruding column 7 around the circumference of the second circular through hole 10, the outer edge circumference of beat gear 3 is provided with round external tooth 13, the inner wall circumference of ring gear 4 is provided with round internal tooth 14, and the internal tooth 14 of ring gear 4 and the external tooth 13 intermeshing of beat gear 3, ring gear 4 rotates the outside of connecting at holder 1 through third bearing 15, third circular through-hole 16 has been seted up to the central point of upper cover plate 5, the bottom of upper cover plate 5 is equipped with the circular cavity that extends to enclose downwards, the outer wall of circular cavity is equipped with fourth bearing 17, the inner wall is equipped with fifth bearing 18, upper cover plate 5 rotates through fourth bearing 17 to be connected in ring gear 4, and upper cover plate 5 rotates through fifth bearing 18 to be connected on the top of eccentric shaft 2. The centers of the first circular through hole 6, the gear ring 4 and the third circular through hole 16 are all on the same axis, and the centers of the second circular through hole 10 and the eccentric part of the eccentric shaft 2 are on the same axis. The external teeth 13 of the yaw gear 3 are smaller than the internal teeth 14 of the ring gear 4. The eccentric shaft 2 is rotatably connected with at least one deflection gear 3. At least two positioning claws 19 are arranged at the bottom of the gear ring 4.

The utility model discloses a theory of operation is: now, it is explained that three convex columns 7 are arranged on the retainer 1, two deflection gears 3 are rotatably connected on the eccentric shaft 2, three oval through holes 12 are arranged on each deflection gear 3, and three positioning claws 19 are arranged at the bottom of the gear ring 4, an output shaft of a motor is fixedly connected to the top of the eccentric shaft 2, the gear ring 4 is connected with an input end of an electric knife rest fine positioning mechanism as an output end, the eccentric shaft 2 is driven by the motor to enable the deflection gears 3 to form a circular track eccentric motion around the retainer 1, the gear ring 4 is driven to realize a speed reduction motion by a small tooth difference speed reduction principle, strong and accurate reverse resistance is formed due to the concentric and uniform circular arc design of the retainer 1 by the three convex columns 7, and the positioning claws 19 corresponding to the electric knife rest fine positioning mechanism are designed at the bottom of the gear ring 4 to enable the electric knife rest to be accurately positioned, from this speed reduction structure has just had the effect of slowing down, promotes the moment of torsion to utilize reverse power supply to carry out the auto-lock.

The foregoing description of the embodiments of the invention has been presented for purposes of illustration and not limitation, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.

Claims

1. The utility model provides a speed reduction structure for electronic knife rest, includes holder, eccentric shaft, beat gear, ring gear and upper cover plate, its characterized in that: the center position of the retainer is provided with a first circular through hole, at least two convex columns are uniformly distributed on the retainer along the center circumference of the first circular through hole, the bottom of the eccentric shaft is rotatably connected in the first circular through hole of the retainer through a first bearing, the top of the eccentric shaft is provided with a bayonet for clamping a motor output shaft, the center position of the deflection gear is provided with a second circular through hole, a second bearing is arranged in the second circular through hole, the deflection gear is rotatably connected with an eccentric part on the eccentric shaft through a second bearing, the deflection gear is provided with an oval through hole matched with the convex column around the circumference of the second circular through hole, the outer edge circumference of the deflection gear is provided with a circle of outer teeth, the inner wall circumference of the gear ring is provided with a circle of inner teeth, the inner teeth of the gear ring are meshed with the outer teeth of the deflection gear, and the gear ring is rotatably connected outside the retainer through a, the center of the upper cover plate is provided with a third circular through hole, the bottom of the upper cover plate is provided with a circular cavity which is formed by extending downwards, the outer wall of the circular cavity is provided with a fourth bearing, the inner wall of the circular cavity is provided with a fifth bearing, the upper cover plate is rotatably connected into the gear ring through the fourth bearing, and the upper cover plate is rotatably connected to the top end of the eccentric shaft through the fifth bearing.

2. The deceleration structure for a motorized blade carrier according to claim 1, wherein: the circle centers of the first circular through hole, the gear ring and the third circular through hole are all on the same axis, and the circle centers of the second circular through hole and the eccentric part of the eccentric shaft are located on the same axis.

3. The deceleration structure for a motorized blade carrier according to claim 1, wherein: the external teeth of the yaw gear are less than the internal teeth of the ring gear.

4. The deceleration structure for a motorized blade carrier according to claim 1, wherein: the eccentric shaft is rotatably connected with at least one deflection gear.

5. The deceleration structure for a motorized blade carrier according to claim 1, wherein: and at least two positioning claws are arranged at the bottom of the gear ring.