CN111791211B

CN111791211B - Robot motor protection mechanism

Info

Publication number: CN111791211B
Application number: CN202010686970.7A
Authority: CN
Inventors: 董明海; 伍国果
Original assignee: Chongqing Xindengqi Mechanical And Electronic Technology Co ltd; Chongqing University of Arts and Sciences
Current assignee: Chongqing Xindengqi Mechanical And Electronic Technology Co ltd; Chongqing University of Arts and Sciences
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-11-23
Anticipated expiration: 2040-07-16
Also published as: CN111791211A

Abstract

The invention belongs to the technical field of protection devices on motors, and particularly discloses a robot motor protection mechanism which comprises a motor, wherein a driving wheel is fixed on an output shaft of the motor, a baffle is fixedly connected to the side wall of the motor, a vent hole is formed in the baffle, a plurality of louvers are rotatably connected to the vent hole, a first gear is fixedly connected to the top end of each louver, a rack is meshed on the first gear, the rack is horizontally and slidably connected to the baffle, a pressure spring is fixedly connected to the side wall of the rack, one end, far away from the rack, of the pressure spring is fixedly connected to the baffle, and the louvers seal the vent hole when the pressure spring is in a free state; the output shaft of the motor is coaxially connected with a worm gear, the worm gear is meshed with a worm, the worm fixes a one-way rotating wheel, and the one-way rotating wheel is meshed with the rack; the rack is capable of slipping the second gear in place when the second gear is moved to the rack end position. The invention aims to solve the problem that the motor cannot be protected in the process of ventilation and heat dissipation.

Description

Robot motor protection mechanism

Technical Field

The invention belongs to the technical field of protection devices on motors, and particularly discloses a robot motor protection mechanism.

Background

The robot has basic characteristics of perception, decision, execution and the like, can assist or even replace human beings to finish dangerous, heavy and complex work, improves the work efficiency and quality, serves human life, and expands or extends the activity and capability range of the human beings. Is widely applied to the fields of industry and the like.

In the prior art, in order to ensure the heat dissipation of the robot motor, the motor is usually exposed to the outside as much as possible. Although this kind of mode can satisfy the ventilation heat dissipation of motor during operation, still make the motor expose outside all the time simultaneously yet, appear easily because of uncontrollable external factors such as foreign object, or sand blown weather collide the motor and lead to the condemned problem of motor.

Disclosure of Invention

The invention aims to provide a robot motor protection mechanism to solve the problem that a motor cannot be protected in the ventilation and heat dissipation processes.

In order to achieve the purpose, the basic scheme of the invention is as follows: a robot motor protection mechanism comprises a motor, wherein a driving wheel is fixed on an output shaft of the motor, a baffle is fixedly connected to the side wall of the motor, a vent hole is formed in the baffle, a plurality of louvers are rotatably connected to the vent hole, a first gear is fixedly connected to the top end of each louver, a rack is meshed with the first gear, the rack is horizontally and slidably connected to the baffle, a pressure spring is fixedly connected to the side wall of the rack, one end, away from the rack, of the pressure spring is fixedly connected to the baffle, and the louvers seal the vent hole when the pressure spring is in a free state; the output shaft of the motor is coaxially connected with a worm gear, the worm gear is meshed with a worm, and the top end of the worm is coaxially fixed with a second gear meshed with the rack; the rack is capable of slipping the second gear in place when the second gear is moved to the rack end position.

The working principle and the beneficial effects of the basic scheme are as follows: 1. this technical scheme utilizes the motor to drive the drive wheel and rotates, realizes the purpose that the drive wheel realized advancing. Meanwhile, the rotation of the motor also drives the worm wheel to rotate circumferentially together, the rotation of the worm wheel drives the worm to rotate circumferentially, and the rotation of the worm drives the second gear to rotate in the same direction and synchronously. The rack is driven by the rotation of the second gear to slide towards the direction close to the pressure spring. The rack makes the first gear on each tripe rotate at gliding in-process, and then makes each tripe all carry out circumferential direction, and then makes the ventilation hole open. When the second gear moves to the end part of the rack, the second gear keeps slipping on the spot, so that the rack can be always kept in a compressed state of the pressure spring. This technical scheme finally realizes the effect of reopening the ventilation hole through the rotation of tripe, makes the heat that the motor produced when the acting can in time volatilize away, realizes instant radiating technological effect.

2. According to the technical scheme, after the motor stops rotating, the second gear loses a rotating power source, so that the rack loses limiting limitation of the second gear, and the rack resets and moves reversely under the action of the pressure spring. During the reverse movement of the rack, the shutter is reset to seal the vent hole. The tripe after resetting again is sealed with the ventilation hole, and then realizes the sealed guard action to the motor, effectively avoids the motor when non-user state, because of external collision, or the uncontrollable external factors such as sand blown by the wind weather lead to the problem emergence of motor damage, effectively improves the security of motor, the life of extension motor.

Further, the second gear is a one-way rotating wheel.

Has the advantages that: due to the structural characteristics of the unidirectional rotating wheel, the outer ring of the unidirectional rotating wheel only slips in situ in the process of the motor rotating in the reverse direction, the rack cannot be affected, and the shutter is prevented from being closed in the process of the motor working.

Further, the unidirectional rotation wheel comprises a disc, the disc is coaxially and fixedly connected to the worm, the side walls of the disc are respectively hinged to pawls, the hinged positions of the pawls and the disc are connected with torsion springs, the outer wall of the disc is coaxially and rotatably connected with a ring, a plurality of ratchet grooves matched with the pawls are formed in the inner edge of the ring, and a plurality of teeth are uniformly fixed on the outer wall of the ring.

Has the advantages that: the technical scheme realizes the unidirectional rotation of the unidirectional rotating wheel by arranging the ratchet wheel, the pawl and other structures.

Further, when the torsion spring is in a free state, an included angle between the pawl and the disc is 10-25 degrees.

Has the advantages that: this technical scheme is through injecing the angle of pawl and disc to guarantee that the pawl can accurately mesh in the thorn groove.

Furthermore, the teeth and the circular ring are integrally formed.

Has the advantages that: this technical scheme is through adopting integrated into one piece's mode to realize the fixed connection of tooth and ring.

Further, the second gear and the worm are fixed through flat keys.

Has the advantages that: the technical scheme adopts a flat key connection mode to realize the fixed connection of the one-way rotating wheel and the worm, and the flat key connection has the advantages of simple structure, convenient assembly and disassembly, good centering property and the like.

Further, the top of the motor is fixedly connected with a bottom plate, and the bottom plate is fixedly connected with a robot.

Further, the robot includes a supporting box, the supporting box is fixedly connected to the top of the bottom plate, and the top of the supporting box is rotatably connected with a mechanical claw.

Has the advantages that: this technical scheme is through add supporting box and gripper at the top of supporting box to satisfy robot work needs.

Furthermore, the baffle lateral wall is connected with from the driving wheel in the rotation of drive wheel height equal, the drive wheel has the track with follow driving wheel outer wall meshing.

Has the advantages that: according to the technical scheme, the driven wheel and the crawler belt are additionally arranged to drive the robot to run.

Further, the cross section of the vent hole is rectangular.

Has the advantages that: this technical scheme adopts the ventilation hole of rectangle to effectively improve the leakproofness of tripe under encapsulated situation, effectively avoid appearing the space.

Drawings

FIG. 1 is a schematic structural diagram of a robot according to an embodiment of the present invention;

FIG. 2 is a front view, partially in section, of a robot in accordance with an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a top cross-sectional view of the worm in cooperation with the rack.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a support box 1, a manipulator 2, a bottom plate 3, a baffle plate 4, a vent hole 5, a driving wheel 6, a driven wheel 7, a servo motor 8, a worm wheel 9, a worm 10, a louver 11, a first gear 12, a sliding groove 13, a rack 14, a pressure spring 15, a disc 16, a ring 17, a pawl 18, a ratchet groove 19, a crawler 20 and a second gear 21.

Example one

As shown in the attached

drawings

1 and 2, the robot motor protection mechanism comprises a robot, wherein the robot comprises a support box 1, and a manipulator 2 is rotatably connected to the bottom of the support box 1. The bottom bolt of supporting box 1 is fixed with bottom plate 3, and the left and right sides integrated into one piece of bottom plate 3 has baffle 4, and two baffles 4 all are perpendicular to bottom plate 3. The outer wall of the baffle 4 is respectively and rotatably connected with a driven wheel 7, and the outer wall of the baffle 4 is also provided with a through hole at the driven equal height position. Bottom plate 3's bottom surface is being close to through-hole department respectively fixedly connected with servo motor 8, and servo motor 8's output shaft is coaxial to be worn out the through-hole and extends in the outside of baffle 4. The servo motor 8 is positioned on an output shaft outside the baffle 4 and is connected with a driving wheel 6 in a coaxial key mode, and the outer diameter of the driving wheel 6 is equal to that of a driven wheel 7 on the same side. The driving wheel 6 positioned on the same side of the baffle 4 is meshed with the outer wall of the driven wheel 7 by a crawler belt 20.

As shown in fig. 3 and fig. 4, the output shaft of the servo motor 8 is further connected with a worm wheel 9 in a coaxial key manner, the side wall of the baffle 4 is rotatably connected with a worm 10, the axial direction of the worm 10 is perpendicular to the vertical direction, and the worm 10 is matched with the worm wheel 9. The side wall of baffle 4 is opened there is rectangular ventilation hole 5, rotates on ventilation hole 5 to be connected with fifteen tripes 11 that are parallel to each other, and the coaxial fixedly connected with first gear 12 in top of every tripe 11, and the lateral wall of baffle 4 still level is opened there is spout 13, and horizontal smooth motion is connected with rack 14 in the spout 13, rack 14 and first gear 12 intermeshing. A compression spring 15 is fixedly connected to the left side of the rack 14, and one end, far away from the rack 14, of the compression spring 15 is fixedly connected to the inner wall of the sliding groove 13. When the pressure spring 15 is in a free state, each louver 11 is in contact with each other to seal the vent holes 5. The top end of the worm 10 is provided with a second gear 21, the second gear 21 comprises a disc 16, the disc 16 is coaxially and flatly fixed at the top end of the worm 10, and the disc 16 and the rack 14 are mutually equal in height. The side wall of the disc 16 is hinged with two pawls 18, the hinged positions of the pawls 18 and the disc 16 are connected with torsion springs, and when the torsion springs are in a free state, the included angle between the pawls 18 and the disc 16 is fifteen degrees. The outer wall of the disc 16 is coaxially and rotatably connected with a ring 17, and the inner edge of the ring 17 is provided with a plurality of ratchet grooves 19 which are matched with the pawls 18. The outer edge of the circular ring 17 is integrally formed with a plurality of teeth, and the outer edge of the circular ring 17 is meshed with the rack 14. The rack 14 can slide the ring 17 in place relative to the rack 14 when the one-way ring 17 is moved to the end position of the rack 14.

The specific implementation process is as follows: the compression spring 15 is in a free state before the servo motor 8 is started, and the shutter 11 seals the vent 5 on the baffle 4. After the servo motor 8 is started, the servo motor 8 drives the driving wheel 6 to rotate, and the driving wheel 6 drives the crawler belt 20 and the driven wheel 7 to rotate, so that the purpose that the driving wheel 6 drives the robot to run is achieved. At the same time, the rotation of the servo motor 8 also drives the worm wheel 9 to rotate circumferentially together, the rotation of the worm wheel 9 drives the worm 10 to rotate circumferentially, the worm 10 rotates to drive the disc 16 to rotate in the same direction and synchronously, and the ring 17 also rotates circumferentially together because the ratchet teeth are inserted into the ratchet groove 19 in this state. The rotation of the ring 17 drives the rack 14 to slide toward the left side compressing the compressed spring 15. The rack 14 rotates the first gear 12 of each louver 11 during the sliding, and each louver 11 rotates circumferentially to reopen the ventilation holes 5. When the end of the rack 14 moves to the ring 17, the rack 14 stops sliding and keeps sliding in place, so that the rack 14 can be always kept in a state that the compression spring 15 is compressed.

After the servo motor 8 stops rotating, the worm 10 loses the power source of rotation, so that the rack 14 loses the limit of the teeth on the ring 17, and the rack 14 is reset to move rightwards under the action of the pressure spring 15. During the movement of the rack 14 to the right, the shutter 11 is reset to seal the vent 5. The louver 11 after resetting seals the vent 5, and further realizes the sealing protection effect on the servo motor 8.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. The utility model provides a robot motor protection mechanism, includes the motor, the motor output shaft is fixed with the drive wheel, its characterized in that: the side wall of the motor is fixedly connected with a baffle plate, the baffle plate is provided with a vent hole, a plurality of louvers are rotatably connected to the vent hole, the top end of each louver is fixedly connected with a first gear, a rack is meshed with the first gear, the rack is horizontally and slidably connected to the baffle plate, the side wall of the rack is fixedly connected with a pressure spring, one end, far away from the rack, of the pressure spring is fixedly connected to the baffle plate, and the louvers seal the vent hole when the pressure spring is in a free state; the output shaft of the motor is coaxially connected with a worm wheel, the worm wheel is meshed with a worm, and a second gear meshed with the rack is coaxially fixed at the top end of the worm; the rack can enable the second gear to slip in place when the second gear moves to the end position of the rack;

the second gear is a one-way rotating wheel which comprises a disc, the disc is coaxially and fixedly connected to the worm, the side walls of the disc are respectively hinged with a pawl, the hinged positions of the pawls and the disc are connected with torsion springs, the outer wall of the disc is coaxially and rotatably connected with a circular ring, a plurality of ratchet grooves matched with the pawls are formed in the inner edge of the circular ring, and a plurality of teeth are uniformly fixed on the outer wall of the circular ring.

2. The robot motor protection mechanism of claim 1, wherein: when the torsion spring is in a free state, the included angle between the pawl and the disc is 10-25 degrees.

3. The robot motor protection mechanism of claim 2, wherein: the teeth and the circular ring are integrally formed.

4. A robot motor protection mechanism according to claim 3, characterized in that: the second gear and the worm are fixed through flat keys.

5. The robot motor protection mechanism of claim 1, wherein: the top of the motor is fixedly connected with a bottom plate, and the bottom plate is fixedly connected with a robot.

6. The robot motor protection mechanism of claim 5, wherein: the robot comprises a supporting box, the supporting box is fixedly connected to the top of the bottom plate, and the top of the supporting box is rotatably connected with a mechanical claw.

7. The robot motor protection mechanism of claim 6, wherein: the baffle lateral wall is connected with from the driving wheel in the rotation of drive wheel equidistance, the drive wheel has the track with follow driving wheel outer wall meshing.

8. The robot motor protection mechanism of claim 1, wherein: the cross section of the vent hole is rectangular.