CN1511680A

CN1511680A - Multiple joint human-imitating robot arm

Info

Publication number: CN1511680A
Application number: CNA021588678A
Authority: CN
Inventors: 李瑞峰; 刘广利; 于殿勇
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2002-12-26
Filing date: 2002-12-26
Publication date: 2004-07-14
Anticipated expiration: 2022-12-26
Also published as: CN1317109C

Abstract

The multiple joint human-imitating robot arm is a kind of arm installed onto robot. It consists of shoulder joint with one turning pair and one swinging pair, elbow joint with two turning pairs and one swinging pair, wrist joint with one turning pair and one swinging pair, upper arm connecting the shoulder joint and the elbow joint, lower arm connecting the elbow joint and the wrist joint and grasping hand connected to the wrist joint. The grasping hand consists of casing, worm inside the casing, one pair of worm gears and one pair of hand claws extending beyond the casing. Each of the turning pairs and swinging pairs in the joints and the worm gears in the hand is driven with a motor separately. The robot arm, like human arm, can perform various operations, including taking, laying, tightening, etc. for realizing certain job function.

Description

Multi-joint human emulated robot arm

Technical field: the present invention relates to a kind of mechanical arm that is installed in the robot.

Background technology: the most volume of existing robots joint type arm is big, and weight is big, and action is owed flexibly, and scope of activities is little, and most AC servo motors that adopt can only not be suitable for the mobile model robot in the fixed-site operation.Great majority are single armed simultaneously, and are powerless for the occasion that needs the both arms coordinative operation.

Summary of the invention: the invention provides a kind of multi-joint human emulated robot arm, this arm can apish arm function carry out various operations, finish take, put, tighten, action such as switch, and realize certain operation function by the Cooperation And Coordination action of both hands arm.Multi-joint human emulated robot arm of the present invention is by having the secondary shoulder joint A of rotary pair and swing, have the secondary ancon joint C of two rotary pairs and swing, have the secondary wrist joint E of rotary pair and swing, be connected big arm B between shoulder joint A and the ancon joint C, be connected the forearm D between ancon joint C and the wrist joint E, the clamping hand F that is connected with the wrist joint E and form; Clamping hand F by housing F1, be installed in worm screw F2 in the housing F1, be arranged on worm screw F2 both sides and form with a pair of worm gear F3, a pair of paw F4 of fixedlying connected with a pair of worm gear F3 respectively of worm screw F2 engagement, paw F4 extends the outside of housing F1; The motion of the worm screw F2 of the rotary pair in each joint and swing pair and clamping hand F is respectively by a driven by servomotor.There are two frees degree in the shoulder joint of this multi-joint human emulated robot arm: motor is started the thorny arm longitudinal axis of arm (0-0 is as follows) revolution (330 ° of range of movement) by the gear pair driving-belt, and another motor drives big arm around the swing of I axle (range of movement-90 °～+ 100 °) by terminal pad; The ancon joint is divided two sections: go up ancon, following ancon, last ancon has 2 frees degree: motor drives the thorny arm longitudinal axis revolution of ancon (330 ° of range of movement) by the gear pair transmission, motor drives forearm around the swing of II axle (range of movement-90 °～+ 90 °) by terminal pad, following ancon has 1 free degree: motor drives the thorny arm longitudinal axis revolution of forearm (330 ° of range of movement) by the gear pair transmission, increase this free degree and can strengthen the barrier ability of keeping away, increase job area; There are 2 frees degree in the wrist joint: motor drives wrist by the cog belt transmission and passes through terminal pad around III axle swing (range of movement-30 °～+ 45 °), motor, drive clamping winding by hand arm longitudinal axis revolution (range of movement-60 °～+ 60 °), motor drives two paws and carries out on-off action by the worm and gear transmission in the clamping hand.Multi-joint human emulated robot arm of the present invention, but left-right symmetry be installed in the robot, the tunable action under computer control of its both arms, (see figure 1) cooperatively interacts.Arm adopts 7+1 (redundancy) degrees of freedom copy man structure, and length and people's arm are similar.This robot arm frame for movement simple and compact, volume are little, in light weight, and each joint connects reliable, convenient disassembly, and motor lines, pickup wire are built-in, and drive connection is simple and clear; Arm has the characteristics of the 7+1 free degree, and the arm motion scope is big, flexibly, and it is strong to keep away the barrier ability; High safety, accessibility are strong, the two hands coordination motion flexibly, applied range; Operation arm energy consumption is low, adopts direct current 24v power supply; Maximum weight capacity: the 1Kg of single job arm.

Description of drawings: Fig. 1 is that robot arm of the present invention is installed in the operating principle figure on one's body of robot, Fig. 2 is the structural representation of robot arm of the present invention, Fig. 3 is the vertical view of Fig. 2, Fig. 4 is the structural representation of shoulder joint A, Fig. 5 is the structural representation of ancon joint C, Fig. 6 is the structural representation of wrist joint E, and Fig. 7 is the structural representation of clamping hand F.

The specific embodiment: consult Fig. 2, Fig. 3, the robot arm of present embodiment is by having the secondary shoulder joint A of rotary pair and swing, have the secondary ancon joint C of two rotary pairs and swing, have the secondary wrist joint E of rotary pair and swing, be connected big arm B between shoulder joint A and the ancon joint C, be connected the forearm D between ancon joint C and the wrist joint E, the clamping hand F that is connected with the wrist joint E and form; Consult Fig. 4, shoulder joint A is made up of joint body A1, shoulder commentaries on classics joint body A2, the first motor A3, first gear A 4, the first gear ring A5, shoulder balance staff A6, the second motor A7; The first motor A3 is installed on the body A1 of joint, the first gear ring A5 is sleeved on the axle A8 of joint body A1, the first gear ring A5 changes joint body A2 with shoulder fixedlys connected, first gear A 4 is connected with the main shaft of the first motor A3, and first gear A 4 is meshed with the first gear ring A5 and forms the rotary pair of shoulder joint A; The shoulder balance staff A6 that is connected with the main shaft of the second motor A7 is fixed in the axle sleeve B1 of big arm B left end, on shoulder commentaries on classics joint body A2, also be fixed with terminal pad A9 and motor shroud A10, terminal pad A9 and motor shroud A10 are supported on the two ends of axle sleeve B1, and terminal pad A9 and motor shroud A10 and axle sleeve B1 form the swing pair that is rotatably assorted and forms shoulder joint A.Consult Fig. 5, the 3rd motor C1 in the big arm B, second gear C 2, the second gear ring C3, elbow change joint body C4, the 4th motor C5, elbow balance staff C6, elbow pendulum joint body C7, the 3rd gear C 8, the 3rd gear ring C9 to ancon joint C by being installed in, the 5th motor C10 that is installed in the forearm D forms; The second gear ring C3 is sleeved on the axle B2 in the big arm B, and the second gear ring C3 is fixedlyed connected with elbow commentaries on classics joint body C4, and second gear C 2 is connected with the main shaft of the 3rd motor C1, and second gear C 2 and the second gear ring C3 are meshing with each other and form the last rotary pair of ancon joint C; The elbow balance staff C6 that is connected with the main shaft of the 4th motor C5 is fixed in the axle sleeve C11 of elbow pendulum joint body C7, on elbow commentaries on classics joint body C4, be fixedly connected with terminal pad C12 and motor shroud C13, terminal pad C12 and motor shroud C13 are supported on the two ends of axle sleeve C11, and axle sleeve C11 and terminal pad C12 and motor shroud C13 form the swing pair that is rotatably assorted and forms ancon joint C; The 3rd gear ring C9 is sleeved on the interior axle D1 of forearm D, the 3rd gear ring C9 is fixedlyed connected with elbow pendulum joint body C7, the 3rd gear C 8 is fixedlyed connected with the main shaft of the 5th motor C10, and the 3rd gear ring C9 and the 3rd gear C 8 are meshing with each other and form the turning down pair of ancon joint C.Consult Fig. 6, the wrist joint E is made up of the 6th motor E1, the cog belt transmission mechanism E2, wrist axle E3, the 7th motor E4, the wrist joint body E5 that are installed in the forearm D; Cog belt transmission mechanism E2 connects main shaft and the wrist axle E3 of the 6th motor E1 respectively, and the two ends of wrist axle E3 and forearm D end form the swing pair that is rotatably assorted and promptly constitutes the wrist joint E; The 7th motor E4 is fixed on the wrist axle E3 by fixture E6, and wrist joint body E5 is fixedlyed connected the rotary pair that promptly constitutes the wrist joint E with the main shaft of the 7th motor E4, and wrist joint body E5 is fixedlyed connected with the housing F1 of clamping hand F.Consult Fig. 7, clamping hand F by housing F1, be installed in screw rod F2 in the housing F1, be arranged on worm screw F2 both sides and form with a pair of worm gear F3, a pair of paw F4 of fixedlying connected with a pair of worm gear F3 respectively of worm screw F2 engagement, paw F4 extends the outside of housing F1.More than each motor be servomotor.

Claims

1, multi-joint human emulated robot arm, it is characterized in that it by have the secondary shoulder joint (A) of rotary pair and swing, have the secondary ancon joint (C) of two rotary pairs and swing, have the secondary wrist joint (E) of rotary pair and swing, be connected big arm (B) between shoulder joint (A) and ancon joint (C), be connected the forearm (D) between ancon joint (C) and wrist joint (E), the clamping hand (F) that is connected with wrist joint (E) is formed; Clamping hand (F) by housing (F1), be installed in worm screw (F2) in the housing (F1), be arranged on worm screw (F2) both sides and form with a pair of worm gear (F3) of worm screw (F2) engagement, a pair of paw (F4) of fixedlying connected with a pair of worm gear (F3) respectively, paw (F4) extends the outside of housing (F1); The motion of the worm screw (F2) of the rotary pair in each joint and swing pair and clamping hand (F) is respectively by a driven by servomotor.

2, multi-joint human emulated robot arm according to claim 1 is characterized in that shoulder joint (A) changes joint body (A2), first motor (A3), first gear (A4), first gear ring (A5), shoulder balance staff (A6), second motor (A7) by joint body (A1), shoulder and form; First motor (A3) is installed on the joint body (A1), first gear ring (A5) is sleeved on the axle (A8) of joint body (A1), first gear ring (A5) changes joint body (A2) with shoulder fixedlys connected, first gear (A4) is connected with the main shaft of first motor (A3), and first gear (A4) is meshed with first gear ring (A5) and forms the rotary pair of shoulder joint (A); The shoulder balance staff (A6) that is connected with the main shaft of second motor (A7) is fixed in the axle sleeve (B1) of big arm (B) left end, on shoulder commentaries on classics joint body (A2), also be fixed with terminal pad (A9) and motor shroud (A10), terminal pad (A9) and motor shroud (A10) are supported on the two ends of axle sleeve (B1), and terminal pad (A9) and motor shroud (A10) form the swing pair that is rotatably assorted and forms shoulder joint (A) with axle sleeve (B1).

3, multi-joint human emulated robot arm according to claim 1 is characterized in that the 3rd motor (C1), second gear (C2), second gear ring (C3), elbow in the big arm (B) changes joint body (C4), the 4th motor (C5), elbow balance staff (C6), elbow pendulum joint body (C7), the 3rd gear (C8), the 3rd gear ring (C9) to ancon joint C by being installed in, the 5th motor (C10) that is installed in the forearm (D) is formed; Second gear ring (C3) is sleeved on the interior axle (B2) of big arm (B), second gear ring (C3) changes joint body (C4) with elbow fixedlys connected, second gear (C2) is connected with the main shaft of the 3rd motor (C1), and second gear (C2) and second gear ring (C3) are meshing with each other and form the last rotary pair in ancon joint (C); The elbow balance staff (C6) that is connected with the main shaft of the 4th motor (C5) is fixed in the axle sleeve (C11) of elbow pendulum joint body (C7), on elbow commentaries on classics joint body (C4), be fixedly connected with terminal pad (C12) and motor shroud (C13), terminal pad (C12) and motor shroud (C13) are supported on the two ends of axle sleeve (C11), and axle sleeve (C11) forms the swing pair that is rotatably assorted and forms ancon joint (C) with terminal pad (C12) and motor shroud (C13); The 3rd gear ring (C9) is sleeved on the interior axle (D1) of big forearm (D), the 3rd gear ring (C9) is fixedlyed connected with elbow pendulum joint body (C7), the 3rd gear (C8) is fixedlyed connected with the main shaft of the 5th motor (C10), and the 3rd gear ring (C9) and the 3rd gear (C8) are meshing with each other and form the turning down pair in ancon joint (C).

4, multi-joint human emulated robot arm according to claim 1 is characterized in that wrist joint (E) is made up of the 6th motor (E1), cog belt transmission mechanism (E2), wrist axle (E3), the 7th motor (E4), the wrist joint body (E5) that are installed in the forearm (D); Cog belt transmission mechanism (E2) connects the main shaft and the wrist axle (E3) of the 6th motor (E1) respectively, and the two ends of wrist axle (E3) and forearm (D) end form to be rotatably assorted and promptly constitute the swing pair in wrist joint (E); The 7th motor (E4) is fixed on the wrist axle (E3) by fixture (E6), wrist joint body (E5) is fixedlyed connected the rotary pair that promptly constitutes wrist joint (E) with the main shaft of the 7th motor (E4), wrist joint body (E5) is fixedlyed connected with the housing (F1) of clamping hand (F).