CN209208896U - A kind of Form of Bionics Mechanical Legs joint transmission means - Google Patents
A kind of Form of Bionics Mechanical Legs joint transmission means Download PDFInfo
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- CN209208896U CN209208896U CN201821957372.3U CN201821957372U CN209208896U CN 209208896 U CN209208896 U CN 209208896U CN 201821957372 U CN201821957372 U CN 201821957372U CN 209208896 U CN209208896 U CN 209208896U
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- shank
- thigh
- ball
- screw nut
- feed screw
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Abstract
The utility model discloses a kind of Form of Bionics Mechanical Legs joint transmission means, are made of thigh, shank, servo motor, ball-screw, feed screw nut, connecting rod, joint shaft and thigh cover board.Wherein, by joint axis connection, transmission main body is located at Medial Thigh Skin for thigh and shank；The mass concentration of structure reduces shank around the rotary inertia of joint shaft at thigh, moreover it is possible to play dust-proof effect, effectively reduce parts depreciation, extends part life.Small pulley and big belt wheel pass through toothed belt transmission；The sliding slot of feed screw nut and ball-screw cooperation on thigh is in the following, feed screw nut slides in the plane for being parallel to thigh cover board and sliding slot along ball-screw.Connecting rod is connect with feed screw nut and shank by pin shaft, and can be rotated around pin shaft；Connecting rod and feed screw nut, shank form reverse slider-crank mechanism, drive shank to swing around joint shaft by connecting rod, improve output torque；It is large carrying capacity, easy to process using member structure.
Description
Technical field
The utility model relates to robotic technology fields, specifically, being related to a kind of Form of Bionics Mechanical Legs joint transmission means.
Background technique
With the development of modern science and technology, Robot industry is in rapid development period as emerging technology industry,
Bionics principle is wherein used, the natural imitation circle excellent design feature and kinetic characteristic of biology and the bionic machine that designs
People can replace the mankind to complete a series of tasks in complicated, rugged environment, convex in space probation, all various aspects of rescue and relief work
Show good application prospect.Form of Bionics Mechanical Legs is a primary study content of bio-robot research field, and pedipulator closes
The section kind of drive is directly related to the quality of the movenent performance of bio-robot.
It is disclosed in patent of invention 201810029156.0 " a kind of V belt translation pedipulator ", which uses multiple servos
Motor driven body, knee, shank and ankle arthrosis are swung, and can carry out motion control to multiple joints simultaneously.But the machine
, can not be dust-proof outside synchronous belt drive mechanism in tool leg is exposed to, the loss of part can be accelerated, reduced the service life.And
Each driving joint uses synchronous belt single-stage driving mode, has the shortcomings that bearing capacity is low and kinematic dexterity is not high.
Utility model content
In order to avoid the shortcomings of the prior art, overcome motor output torque deficiency cause pedipulator load capacity it is low,
The not high problem of kinematic dexterity, the utility model proposes a kind of Form of Bionics Mechanical Legs joint transmission means.The joint transmission means
The joint transmission combined using synchronous belt, feed screw nut and slider-crank mechanism, Lai Tigao output torque, to improve machine
The load capacity and kinematic dexterity of tool leg.
The technical scheme adopted by the utility model to solve the technical problem is as follows: including thigh, thigh cover board, servo electricity
Mechanical, electrical machine fixing seat, small pulley, big belt wheel, synchronous belt, sliding slot, ball-screw, feed screw nut, connecting rod, bearing, bearing block and
Shank, it is characterised in that described thigh one end and shank one end are by joint axis connection, and joint shaft axis is perpendicular to big leg axis
With plane where shank axis；The servo motor, ball-screw and synchronous belt install Medial Thigh Skin, and servo motor passes through motor
Mounting base is fixed on thigh web top side, and servo motor output shaft and small pulley are connected, and bearing block is fixed on thigh web
The top other side, ball-screw both ends are fixed by bearing and bearing seat supports, and are located at coplanar parallel peace with servo motor
Dress, big belt wheel and ball-screw are connected by flat key, and small pulley and big belt wheel pass through toothed belt transmission, feed screw nut and ball wire
Thick stick be cooperatively connected be located at thigh on sliding slot in the following, feed screw nut in the plane for being parallel to thigh cover board and sliding slot along ball wire
Thick stick sliding；Described connecting rod one end is connect with feed screw nut by the first pin shaft, and the connecting rod other end and shank are connected by the second pin shaft
It connects, and can be rotated around pin shaft, connecting rod and feed screw nut, shank form reverse slider-crank mechanism, drive shank by connecting rod
It is swung around joint shaft, shank swing speed value range is 20~25rpm；
Formula is calculated as follows in ball-screw torque and thrust:
T=(T1+T2)*e
T1=(Fa*p)/(2*3.14*n1)
T2=T1+J*ω
In formula, T is practical driving torque, T1Driving torque when for constant speed, T2Driving torque when to accelerate, e is allowance
Coefficient, n1For the forward efficiency of lead screw, FaFor feed screw nut axial load, p is ball-screw lead, and J is calf joint around joint shaft
The rotary inertia of swing, ω are the angular acceleration that shank is swung.
The servo motor uses 388987 type of maxon RE；Synchronous belt reduction ratio is 2:1.
Beneficial effect
The utility model proposes a kind of Form of Bionics Mechanical Legs joint transmission means, which passes through joint by thigh and shank
Axis connection, transmission main body are located at Medial Thigh Skin, and thigh structure includes servo motor, motor fixing seat, small pulley, big belt wheel, same
Walk band, ball-screw, feed screw nut, connecting rod, pin shaft and thigh cover board；The mass concentration of structure not only can be reduced at thigh
Rotary inertia of the shank around joint shaft, moreover it is possible to play dust-proof effect, efficiently reduce parts depreciation, extend the part longevity
Life.
The utility model joint transmission means are driven using the three-level of synchronous belt, feed screw nut and slider-crank mechanism
Mode, under the servo motor driving of equal-wattage, output torque can than the mode that single-stage synchronous belt directly drives shank movement
Improve 2~3 times or more, thus, joint transmission means can make pedipulator movement have stronger load capacity and it is good flexibly
Property.
The utility model joint transmission means can be replaced according to the demand of different loads, revolving speed and shank hunting range
The ball-screw of the servo motor and different trips of different capacity, lead, it is convenient for disassembly and assembly, it is adaptable.Using member structure, hold
Loading capability is big, manufacture easy to process, low in cost.
Detailed description of the invention
A kind of Form of Bionics Mechanical Legs joint transmission means of the utility model are made with embodiment with reference to the accompanying drawing further
It is described in detail.
Fig. 1 is the utility model Form of Bionics Mechanical Legs joint transmission means axonometric drawing.
Fig. 2 is the utility model joint transmission means structural schematic diagram.
Fig. 3 is the utility model Form of Bionics Mechanical Legs joint transmission means schematic diagram.
In figure:
1. 6. small pulley of thigh 2. thigh cover board, 3. shank, 4. servo motor, 5. motor fixing seat, 7. big belt wheel 8.
14. bearing block of synchronous belt 9. sliding slot, 10. ball-screw, 11. feed screw nut, 12. connecting rod, 13. bearing, 15. first pin shaft
16. 17. joint shaft of the second pin shaft
Specific embodiment
The present embodiment is a kind of Form of Bionics Mechanical Legs joint transmission means, is toothed belt transmission, screw nut driven and song
The joint transmission that handle slide block mechanism combines, the transmission suitable for mechanical leg joint.
Refering to fig. 1, Fig. 2 and Fig. 3, the present embodiment Form of Bionics Mechanical Legs joint transmission means by thigh 1, thigh cover board 2, are watched
Take motor 4, motor fixing seat 5, small pulley 6, big belt wheel 7, synchronous belt 8, sliding slot 9, ball-screw 10, feed screw nut 11, connecting rod
12, bearing 13, bearing block 14 and shank 3 form；Wherein, 1 one end of thigh and 3 one end of shank are connected by joint shaft 17, joint
17 axis of axis is perpendicular to plane where 3 axis of 1 axis of thigh and shank.Servo motor 4, ball-screw 10 and synchronous belt 8 are installed
Inside thigh 1.Servo motor 4 is fixed on thigh web top side by motor mount 5, servo motor output shaft with it is small
Belt wheel 6 is fixedly connected.Bearing block 14 is fixed on the thigh web top other side, and 10 both ends of ball-screw pass through bearing 13 and bearing
14 support of seat is fixed, and is located at coplanar parallel installation with servo motor 4.Big belt wheel 7 and ball-screw 10 are connected by flat key,
Small pulley 6 is driven with big belt wheel 7 by synchronous belt 8.The cunning that feed screw nut 11 and ball-screw 10 are cooperatively connected on thigh
Slot 9 is in the following, feed screw nut 11 slides in the plane for being parallel to thigh cover board 2 and sliding slot along ball-screw 10.12 one end of connecting rod
It is connect with feed screw nut 11 by the first pin shaft 15,12 other end of connecting rod is connect with shank 3 by the second pin shaft 16, and can be around pin
Axis rotation.The present embodiment converts the rotary motion of motor to by screw nut driven the linear motion of feed screw nut, then
Calf joint is driven to swing around joint shaft by the connecting rod being connected on feed screw nut again, to realize the flexible fortune of calf joint
It is dynamic.
In the present embodiment, servo motor is 388987 type of maxon RE, and non-loaded revolving speed is 3670rpm, and nominal torque is
0.8Nm, synchronous belt reduction ratio are 2:1, and ball-screw lead is 4mm, stroke 100mm.It is calculated according to each component parameters,
Shank swing speed is 20~25rpm, can meet motion requirement.According to the calculation formula of ball-screw torque and thrust:
T=(T1+T2)*e
T1=(Fa*p)/(2*3.14*n1)
T2=T1+J*ω
In formula, T is practical driving torque, T1Driving torque when for constant speed, T2Driving torque when to accelerate, e is allowance
Coefficient, n1For the forward efficiency of lead screw, FaFor feed screw nut axial load, p is the lead of ball-screw, and J is calf joint around joint
The rotary inertia that axis is swung, ω are the angular acceleration that shank is swung.
Increase square feature according to the reduction of speed of toothed belt transmission, the reduction ratio of synchronous belt is a, the output torque T of motorm=T/a.
By calculating, in the identical situation of shank oscillating angular acceleration, required motor output torque TmIt is that single-stage synchronous belt directly drives
Mode, the 1/3~1/2 of required motor output torque, thus under identical servo motor output torque, the present embodiment can get
Bigger output torque and oscillating angular acceleration makes joint leg have stronger load capacity and flexible swinging.It can be according to not
The ball-screw of different trips is selected, with the motion requirement of robot to change the swing angle range of shank.With stroke 100mm
Ball-screw for, in stroke shank swing angle range be 0~180 °, meet the joint motions demand of walking robot.
In the present embodiment, in order to reduce the gross mass of shank 3, to reduce its rotary inertia, rotation flexibility, the pass are improved
Section transmission main part is located inside thigh 1.Servo motor 4 is fixed on the web of thigh 1 by motor fixing seat 5, motor
Output shaft and small pulley 6 connect passing movement and torque, and small pulley 6 is driven with big belt wheel 7 by synchronous belt 8, motor output shaft
Revolving speed and torque by synchronous belt drive mechanism reduction of speed increase square, revolving speed and torque are transmitted in big belt wheel 7.Ball-screw 10
Both ends are supported and are fixed by bearing 13 and bearing block 14, and bearing block 14 is mounted on inside thigh 1, makes ball-screw 10
It can axially make rotating motion, be connected between big belt wheel 7 and ball-screw 10 by flat key, torque and revolving speed are transmitted to rolling
Ballscrew 10,11 sets of feed screw nut on ball-screw 10, torque effect under, between ball-screw 10 and feed screw nut 11
Relative motion occurs.11 both ends of feed screw nut are limited by the sliding slot 9 inside thigh 1, can only be in the plane for being parallel to thigh cover board 2
Inside slide up and down.After the transmission of the two-stage of synchronous belt and screw nut driven, the rotary motion of motor output shaft is converted into
The linear motion axial along ball-screw 10 of feed screw nut 11.Feed screw nut 11 and 12 one end of connecting rod are connected by the first pin shaft 15
It connects, it between the two can flexible rotating；Connecting rod 12 is connected with shank 3 by the second pin shaft 16, between the two can flexible rotating.Lead screw
Nut 11,12 other end of connecting rod and shank 3 constitute a reverse slider-crank mechanism, and the linear motion of feed screw nut 11 passes through
Reverse slider-crank mechanism is converted to shank 3 around the swing of joint shaft 17, and the axial thrust of feed screw nut 11 passes through connecting rod 12
It is transmitted at shank 3, shank 3 has a radius of turn r around joint shaft 17, so that output torque is more than direct drive mode
Greatly.After the transmission of toothed belt transmission, screw nut driven and slider-crank mechanism, motion mode becomes from motor shaft rotation
Feed screw nut linear motion, is eventually converted into the swing of shank, while the reduction of speed Jing Guo three-level transmission process Zhong Ge mechanism, increasing
Square, the output torque at shank increase, and velocity of rotation also meets motion requirement.
The course of work
The present embodiment is by taking Form of Bionics Mechanical Legs moves a cycle as an example；Using shank 3 and 1 parallel position of thigh as starting point, i.e.,
Non- crank block dead-centre position, tool leg lift leg process: starting servo motor 4, motor output shaft rotates forward, and exports with motor
The small pulley 6 that axis is connected by flat key rotates with it, and small pulley 6 and big belt wheel 7 are driven by synchronous belt 8, and synchronous belt 8 is by small band
The torque and kinetic energy of wheel 6 are transmitted in big belt wheel 7, so that big belt wheel 7 be driven to rotate.Big belt wheel 7 and ball-screw 10 pass through flat
Key connection transmitting torque and kinetic energy, drive ball-screw 10 around own axis, and ball-screw 10 then passes through bearing block 14
The inside of thigh 1 is supported and be axially fixed in, so that ball-screw 10 can only rotate, and cannot be moved axially.Feed screw nut
11 are sleeved on ball-screw 10, and relative motion occurs with ball-screw 10, because feed screw nut 11 is stuck in sliding slot 9, so that
Feed screw nut 11 can only be moved in a straight line along the axial direction of ball-screw 10, i.e., the torque of ball-screw 10 and revolving speed are converted to
The axial thrust and linear movement of feed screw nut 11.When pedipulator lifts, feed screw nut 11 is moved up, feed screw nut 11 and company
Bar 12 is connected by the first pin shaft 15, between the two can flexible rotating；Connecting rod 12 is connected with shank 3 by the second pin shaft 16, and two
It can flexible rotating between person.Feed screw nut 11 constitutes reverse slider-crank mechanism, the active of the mechanism with connecting rod 12 and shank 3
Part is feed screw nut 11, drives shank 3 to be swung up around joint shaft 17 by connecting rod 12.Pass through turning for 4 output shaft of servo motor
The dynamic position for changing feed screw nut 11, i.e., the rotation angle of adjustable shank 3, i.e. lift leg position.
Pedipulator receives leg process: starting servo motor 4 rotates backward motor output shaft, and what is connect with motor output shaft is small
Belt wheel 6 rotates backward therewith, and small pulley 6 is driven with big belt wheel 7 by synchronous belt 8, and synchronous belt 8 is by the torque of small pulley 6 and moves
It can be transmitted in big belt wheel 7, so that big belt wheel 7 be driven to rotate backward.Big belt wheel 7 is fixedly connected with ball-screw 10 by flat key
Torque and kinetic energy are transmitted, drives ball-screw 10 around own axis.Feed screw nut 11 is sleeved on ball-screw 10, with rolling
Relative motion occurs for ballscrew 10, and the torque of ball-screw 10 and revolving speed are converted into the axial thrust of feed screw nut 11 and straight line moves
It is dynamic.When receiving leg, feed screw nut 11 is moved down, and is driven shank 3 to do around joint shaft 17 by connecting rod 12 and is received leg movement, by watching
Take the receipts leg position of the i.e. adjustable pedipulator in position of the rotation change feed screw nut 11 of 4 output shaft of motor.
Claims (2)
1. a kind of Form of Bionics Mechanical Legs joint transmission means, including thigh, thigh cover board, servo motor, motor fixing seat, small band
Wheel, big belt wheel, synchronous belt, sliding slot, ball-screw, feed screw nut, connecting rod, bearing, bearing block and shank, it is characterised in that: institute
Thigh one end and shank one end are stated by joint axis connection, joint shaft axis is perpendicular to flat where big leg axis and shank axis
Face；The servo motor, ball-screw and synchronous belt install Medial Thigh Skin, and servo motor is fixed on thigh by motor mount
Web top side, servo motor output shaft and small pulley are connected, and bearing block is fixed on the thigh web top other side, ball wire
Thick stick both ends are fixed by bearing and bearing seat supports, and are located at coplanar parallel installation, big belt wheel and ball wire with servo motor
Thick stick is connected by flat key, and by toothed belt transmission, feed screw nut is located at big with ball-screw mating connection for small pulley and big belt wheel
Sliding slot on leg is in the following, feed screw nut slides in the plane for being parallel to thigh cover board and sliding slot along ball-screw；The connecting rod
One end is connect with feed screw nut by the first pin shaft, and the connecting rod other end is connect with shank by the second pin shaft, and can be turned around pin shaft
Dynamic, connecting rod and feed screw nut, shank form reverse slider-crank mechanism, drive shank to swing around joint shaft by connecting rod, small
Leg swing speed range is 20~25rpm；
Formula is calculated as follows in ball-screw torque and thrust:
T=(T1+T2)*e
T1=(Fa*p)/(2*3.14*n1)
T2=T1+J*ω
In formula, T is practical driving torque, T1Driving torque when for constant speed, T2Driving torque when to accelerate, e are allowance system
Number, n1For the forward efficiency of lead screw, FaFor feed screw nut axial load, p is ball-screw lead, and J is that calf joint is put around joint shaft
Dynamic rotary inertia, ω are the angular acceleration that shank is swung.
2. Form of Bionics Mechanical Legs joint transmission means according to claim 1, it is characterised in that: the servo motor uses
388987 type of maxon RE；Synchronous belt reduction ratio is 2:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821957372.3U CN209208896U (en) | 2018-11-27 | 2018-11-27 | A kind of Form of Bionics Mechanical Legs joint transmission means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821957372.3U CN209208896U (en) | 2018-11-27 | 2018-11-27 | A kind of Form of Bionics Mechanical Legs joint transmission means |
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| Publication Number | Publication Date |
|---|---|
| CN209208896U true CN209208896U (en) | 2019-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821957372.3U Expired - Fee Related CN209208896U (en) | 2018-11-27 | 2018-11-27 | A kind of Form of Bionics Mechanical Legs joint transmission means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109693726A (en) * | 2018-11-27 | 2019-04-30 | 西北工业大学 | A kind of Form of Bionics Mechanical Legs joint transmission means |
| CN113878615A (en) * | 2021-09-27 | 2022-01-04 | 伯朗特机器人股份有限公司 | Robot joint motor torque calculation method |
-
2018
- 2018-11-27 CN CN201821957372.3U patent/CN209208896U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109693726A (en) * | 2018-11-27 | 2019-04-30 | 西北工业大学 | A kind of Form of Bionics Mechanical Legs joint transmission means |
| CN113878615A (en) * | 2021-09-27 | 2022-01-04 | 伯朗特机器人股份有限公司 | Robot joint motor torque calculation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190806 Termination date: 20201127 |