Patent Application
20140064901
1. Technical Field
The present disclosure relates to transporting devices, and particularly to a transporting device employed in a robot arm.
2. Description of the Related Art
In a manufacturing process, a transporting device can be mounted on a robot arm for transporting workpieces. The transporting device includes a driver and a connection shaft. One end of the connection shaft is securely mounted on a distal end of the robot arm. A clamping member is mounted on the other end of the connection shaft for clamping the workpieces. The driver is mounted on the connection shaft for driving the clamping member to clamp the workpieces. The driver moves with the connection shaft, which adds weight to the connection shaft, such that the connection shaft driven by the robot arm moves slowly. In addition, the single connection shaft has a weak structure, which results in a short usage lifetime or lifespan of the transporting device.
Therefore, there is room for improvement within the art.
The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views.
The driving assembly 30 includes a first driving member 31 and a second driving member 33, which are controlled by a controller (not shown). The first driving member 31 includes a main body 311 and a driving end 313 rotatably connected to and driven by the main body 311. The main body 311 is mounted to the first mounting portion 13. The driving end 313 is located away from the first mounting portion 13. The second driving member 33 includes a main body 331 and a driving end 332 rotatably connected to and driven by the main body 331. The main body 331 is mounted to the second mounting portion 15. The main body 311 of the first driving member 31 and the main body 331 of the second driving member 33 are substantially coaxial. The driving end 332 of the second driving member 33 is positioned adjacent to the driving end 313 of the first driving member 31. In an illustrated embodiment, the first driving member 31 and the second driving member 33 are direct drive motors.
The first linking mechanism 50 is securely connected to the driving end 313, such that the first linking mechanism 50 is driven to rotate relative to the base 10 by the first driving member 31. The first linking mechanism 50 includes a first connecting link 51 and a second connecting link 53 hinged to the first connecting link 51. The first connecting link 51 includes a connecting portion 511 and a pushing portion 513 extending from the connecting portion 513. The connecting portion 511 is securely mounted to an end of the driving end 313. The pushing portion 513 is strip-like. A free end of the pushing portion 513 is hinged to one end of the second connecting link 53 by one first hinge assembly 80. The second connecting link 53 is strip-like. The second connecting link 53 includes a hinged end 531 away from the pushing portion 513. The hinged end 531 defines a receiving groove 5311. A hinged hole 5313 is defined in a bottom of the receiving groove 5311. A mounting arm 533 is formed on the hinged end 531. A clamping member (not shown) is mounted on the mounting arm 533 for clamping the workpieces.
The second linking mechanism 70 is similar to the first linking mechanism 50. The second linking mechanism 70 is securely connected to the driving end 332, such that the second linking mechanism 70 is driven by the second driving member 33 to move rotatively relative to the base 10. The second linking mechanism 70 includes a third connecting link 71 and a fourth connecting link 73 hinged to the third connecting link 71. A connecting portion 711 of the third connecting link 71 is securely connected to the driving end 332. A pushing portion 713 of the third connecting link 71 is hinged to the fourth connecting link 73. In the illustrated embodiment, the third connecting link 71 is hinged to the fourth connecting link 73 by the other one first hinge assembly 80. The fourth connecting link 73 includes a hinged end 731 away from the third connecting link 71. The hinged end 731 is hinged to the hinged end 531 of the first linking mechanism 50. A receiving groove 7311 is defined in the hinged end 731 corresponding to the receiving groove 5311 of the first linking mechanism 50. A hinged hole 7313 is defined in a bottom of the receiving groove 7311 of the hinged end 731. The receiving grooves 7311, 5311 cooperatively define a mounting space 730, and the hinged holes 7313, 5313 are coaxial.
The first hinge assembly 80 has a same structure as the second hinge assembly 90. For simplicity, only the second hinge assembly 90 is described in detail. The second hinge assembly 90 includes two first bearings 91, a second bearing 93, a connecting member 95, and a locking member 97. The two first bearings 91 are respectively received in the hinged holes 5313, 7313. The second bearing 93 is received in the mounting space 730 and resists against the hinged end 531 and the hinged end 731, such that the fourth connecting link 73 is movable relative to the second connecting link 53. The connecting member 95 includes a block portion 951 and a locking portion 953 formed on the block portion 951. The block portion 951 is plate-like and resists against an inner periphery of one first bearing 91 mounted on the hinged end 531 of the first linking mechanism 50. The locking portion 953 is substantially cylindrical. One end of the locking portion 953 away from the first linking mechanism 50 passes through the first bearing 91 mounted on the hinged end 531, the second bearing 93, and the other first bearing 91 mounted on the hinged end 731 in that order, and then partly protrudes out from the hinged end 731. The locking member 97 is threadedly engaged with the locking portion 953, and resists against the other first bearing 91 mounted on the hinged end 731, such that a distance between the second connecting link 53 and the fourth connecting link 73 is adjustable by rotation of the connecting member 95 and the locking member 97.
In assembly, the first driving member 31 and the second driving member 33 are mounted to the first mounting portion 13 and the second mounting portion 15, respectively. The hinged end 531 of the first linking mechanism 50 and the hinged end 731 of the second linking mechanism 70 are assembled together, and the second bearing 93 is placed in the mounting space 730. The two first bearings 91 are placed on the hinged end 531 and the hinged end 731, respectively. One end of the locking portion 953 passes through the first bearing 91 mounted on the hinged end 531, the second bearing 93, and the other first bearing 91 mounted on the hinged end 731 in that order, and then is threaded with the locking member 97. The first connecting link 51 and the third connecting link 71 are respectively mounted on the first driving member 31 and the second driving member 33, and the clamping member is mounted on the mounting arm 533.
In use, the workpiece is clamped by the clamping member. The first driving member 31 and the second driving member 33 drive the first linking mechanism 50 and the second linking mechanism 70, respectively, such that the first linking mechanism 50 and the second linking mechanism 70 move toward each other, away from each other, or in a same direction. When the driving end 313 rotates clockwise, and the driving end 332 rotates counterclockwise, the first linking mechanism 50 and the second linking mechanism 70 move toward each other, and the first connecting link 51 and the third connecting link 71 respectively move the second connecting link 53 and the fourth connecting link 73 away from the main portion 12 of the base 10. When the driving end 313 rotates counterclockwise, and the driving end 332 rotates clockwise, the first linking mechanism 50 and the second linking mechanism 70 move away from each other, and the first connecting link 51 and the third connecting link 71 respectively move the second connecting link 53 and the fourth connecting link 73 toward the main portion 12 of the base 10. That is to say, when the first connecting link 51 and the third connecting link 71 move toward or away from each other, the second connecting link 53 and the fourth connecting link 73 telescopes relative to the base 10. When the driving end 313 and the driving end 332 rotate in a same direction relative to the base 10, the first linking mechanism 50 and the second linking mechanism 70 rotate in the same direction relative to the base 10, and the second connecting link 53 and the fourth connecting link 73 rotate with the first connecting link 51 and the third connecting link 71 in the same direction relative to the base 10.
The driving assembly 30 moves the first linking mechanism 50 and the second linking mechanism 70 by a single joint formed between the connecting portion 511 and the connecting portion 711, such that no extra force is added to the first linking mechanism 50 and the second linking mechanism 70. Thus, the first linking mechanism 50 and the second linking mechanism 70 move swiftly. In addition, the transporting device 100 has two linking mechanisms instead of one. Thus, the transporting device 100 is sturdier.
In other embodiments, if the workpieces are suitable for hanging on the mounting arm 533, the clamping member can be omitted. The main body 311 of the first driving member 31 and the main body 331 of the second driving member 33 can be non-coaxial, and lengths of the first linking mechanism 50 and the second linking mechanism 70 can be changed accordingly. The first bearings 91 and the second bearing 93 can be omitted, as long as the hinged ends 731, 531 are smooth enough to rotate swiftly, such that the hinged ends 731, 531 are hinged together by the connecting member 95 and the locking member 97.
It is to be understood, however, that even through numerous characteristics and advantages of the disclosure have been set forth in the foregoing description, together with details of the structure and function of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012103177127 | Aug 2012 | CN | national |
