Abstract:
A transport configured to cooperate with a mechanical arm to pick up and place rubber plugs, includes a housing, a piston assembly received in the housing and a pickup assembly. The pickup assembly includes a guide base and a pickup member. The guide base defines a second receiving cavity. The housing also defines a first receiving cavity coupling with the second receiving cavity. A first tracheal joint and a second tracheal joint are provided on the housing. The piston assembly is slidably received in the first receiving cavity and driven by the first tracheal joint. The piston assembly defines a channel coupling with the second tracheal joint. The pickup member includes a connecting portion and an ejection portion inserting through the connecting portion. The connecting portion is received in the second receiving cavity. The ejection portion defines an air vent.

Description:
FIELD 
     The subject matter herein generally relates to transports, and in particular to a transport to pick up and place small rubber plugs. 
     BACKGROUND 
     A transport is configured to place rubber plugs in the holes of the workpiece. The transport includes a cylinder mounted to a mechanical arm, a piston assembly coupled to the cylinder, a rod coupled to the piston assembly, and a suction nozzle coupled to the rod. Another end of the suction nozzle is coupled to an air supply. When transporting a rubber plug, the cylinder drives the piston assembly, and the piston assembly presses the suction nozzle to the rubber plug. The air supply controls the suction nozzle to suction to the rubber plug. Then, the mechanical arm drives the transport to place the rubber plug in the holes of the workstation. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
         FIG. 1  is a perspective view of an embodiment of a transport. 
         FIG. 2  is an exploded, perspective view of the transport of the  FIG. 1 . 
         FIG. 3  is a cross-sectional view of the transport of the  FIG. 1 . 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure. 
     Several definitions that apply throughout this disclosure will now be presented. 
     The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “outside” refers to a region that is beyond the outermost confines of a physical object. The term “inside” indicates that at least a portion of a region is partially contained within a boundary formed by the object. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like. 
       FIG. 1  illustrates an embodiment of a transport  100 . The transport  100  can be configured to cooperate with a mechanical arm (not shown) to pick up and place a rubber plug in a hole of a workpiece (not shown). The transport  100  can include a housing  20  and a pickup assembly  60  mounted to the housing  20 . 
     The housing  20  can include a first housing  21 , a first tracheal joint  23 , a second housing  25 , and a second tracheal joint  27 . One end of the first housing  21  can be coupled to the mechanical arm, and the other end of the first housing  21  can be coupled to the second housing  25 . One end of the first tracheal joint  23  can be coupled to an air supply (not shown), and the other end of the first tracheal joint  23  can be coupled to the first housing  21 . One end of the second tracheal joint  27  can be coupled to the air supply, and the other end of the second tracheal joint  27  can be coupled to the second housing  25 . 
       FIG. 2  illustrates the transport  100  can further include a piston assembly  40 . The piston assembly  40  can be slidable and received in the housing  20 . The end of the first housing  21  coupled to the second housing  25  can form a connecting portion  211 . The second housing  25  can be mounted to the connecting portion  211 , and can define a first through vent  251 . 
     The piston assembly  40  can include a first piston assembly  41  and a second piston assembly  45  coupled to the first piston assembly  41 . 
     The first piston assembly  41  can include a first main body  411 , and a first flange  413  coupled to one end of the first main body  411 . A plurality of sealing members  4111  can be arranged with the first main body  411 . The sealing members  4111  can seal the first main body  411  and an inner wall of the first housing  21 . One end of the first flange  413  away from the first main body  411  can define a groove  4133  along a radial direction. 
     The second piston assembly  45  can include a stepped vent  451 , a second flange  452 , and a second main body  453  formed from one side of the second flange  452 . The stepped vent  451  can pass through the second flange  452  and the second main body  453 . The second flange  452  can be coupled to the first flange  413 . A plurality of sealing members  4521  can be arranged with the second main body  453 . The sealing members  4521  can seal the second main body  453  and an inner wall of the second housing  25 . 
     The pickup assembly  60  can couple to the second housing  25  and the second piston assembly  45 , and can include a sealing base  61 , a pickup member  63 , a guide base  65 , and an elastic member  67 . 
     The sealing base  61  can be received in the stepped vent  451 , and include a third main body  611  and an extending portion  613 . 
     The pickup member  63  can include a connecting portion  631  arranged with the extending portion  613 ; the extending portion  613  can include an ejection portion  633  inserted in the connecting portion  631 . An outside wall of the connecting portion  631  can include a screw thread  6311 , and the connecting portion  631  can be hermetically sealed to the inside wall of the second main body  453  by the screw thread  6311 . The ejection portion  633  can be configured to pick up and place the rubber plug  200 , and can define an air vent  6332 . In one embodiment, the ejection portion  633  can be needle shaped. 
     The guide base  65  can be coupled to the second housing  25 , and can define a receiving cavity  651 . The receiving cavity  651  can be configured to partly receive the connecting portion  631  and the ejection portion  633 . The ejection portion  633  can pass through the guide base  65 , and the second piston assembly  45  can drive the ejection portion  633  to reach outside  300  of the receiving cavity  651 . The ejection portion  633  can pick up the rubber plug  200 . Then, the ejection portion  633  can retract into the receiving cavity  651 , and the guide base  65  can resist against the rubber plug  200 . The ejection portion  633  can place the rubber plug  200  in the hole of the workpiece. 
     The elastic member  67  can be arranged with the pickup member  63  and be received in the receiving cavity  651 . One end of the elastic member  67  can resist against the guide base  65 , and the other end of the elastic member  67  can resist against the second main body  453 . The elastic member  67  can be configured to avoid a collision and damaging the second main body  453  and the guide base  65 . 
       FIG. 3  illustrates the housing  20  can define a receiving cavity  201 , and the receiving cavity  201  can receive the piston assembly  40 . The connecting portion  211  (see  FIG. 2 ) can define a first blind vent  213 . In one embodiment, the first blind vent  213  can be a stepped shape, and can include a first receiving vent  2131  away from the connecting portion  211 , and a second receiving vent  2133  through the connecting portion  211 . A size of the first receiving vent  2131  can be smaller than the size of the second receiving vent  2133 . The first tracheal joint  23  can be coupled to the first receiving vent  2131 . The air can be supplied into or extracted from the first blind vent  213  through the first tracheal joint  23  to move the piston assembly  40 . 
     The first through vent  251  can be coupled to the first blind vent  213  to form the receiving cavity  201 . In one embodiment, the first through vent  251  can be stepped shape, and can include a third receiving vent  2511  coupled to the second receiving vent  2133 , and a fourth receiving vent  2513  away from the second receiving vent  2133 . A size of the fourth receiving vent  2513  can be smaller than that of the third receiving vent  2511 . The second tracheal joint  27  can be coupled to the third receiving vent  2511 . 
     The first piston assembly  41  (see  FIG. 2 ) can be slidably received in the first blind vent  213 , and the second piston assembly  45  can be slidably received in the first through vent  251 . The piston assembly  40  can define a channel  48 , and the channel  48  can be coupled with the first piston assembly  41  and the second piston assembly  45 . 
     The first main body  411  (see  FIG. 2 ) can be slidably received in the first receiving vent  2131 . The first flange  413  can be received in the second receiving vent  2133 , and can define a second blind vent  4131  away from one end of the first main body  411  along an axial direction. The second blind vent  4131  can couple to the second receiving vent  2133  in the groove  4133 . 
     The second flange  452  (see  FIG. 2 ) can be received in the third receiving vent  2511 . The second main body  453  can be slidably received in the fourth receiving vent  2513 . The stepped vent  451  can couple to the second blind vent  4131  and the groove  4133  to form the channel  48 . The stepped vent  451  can include a fifth receiving vent  4511  coupled to the second blind vent  4131 , and a sixth receiving vent  4513  away from the second blind vent  4131 . A size of the sixth receiving vent  4513  can be smaller than a size of the fifth receiving vent  4511 . A junction of the fifth receiving vent  4511  and the sixth receiving vent  4513  can form a stepped surface  4516 . 
     The third main body  611  (see  FIG. 2 ) can be hermetically received in the fifth receiving vent  4511 , and one end of the third main body  611  away from the first flange  413  can resist against the stepped surface  4516 . The extending portion  613  can be formed from one end of the third main body  611 , and can be received in the sixth receiving vent  4513 . The sealing base  61  can define a second through vent  615  passing through the third main body  611  and the extending portion  613 . The second through vent  615  can couple with the second blind vent  4131  and the groove  4133 . 
     The connecting portion  631  can be partly received in the sixth receiving vent  4513 . The air vent  6332  can couple to the air supply via the second through vent  615 , the second blind vent  4131 , the groove  4133 , and second tracheal joint  27 . The receiving cavity  651  can couple to the fourth receiving vent  2513 . 
     In operation, the first housing  21  can be mounted to the mechanical arm, and the mechanical arm can move the transport  100  to the picking position. The ejection portion  633  can be directed at the rubber plug  200 . The air supply can supply air to the first tracheal joint  23 , and increase the pressure of the first receiving vent  2131 . The pressure can move the first piston assembly  41  and the second piston assembly  45  towards the rubber plug  200 . The second main body  453  can press the elastic member  67 , and the ejection portion  633  can pass through the guide base  65  into the rubber plug  200 . The air supply can extract air via the second tracheal joint  27 , and the pressure of the groove  4133 , the second blind vent  4131 , the second through vent  615 , and the air vent  6332  can be reduced to create a negative pressure. The negative pressure can allow the ejection portion  633  to steadily suction to the rubber plug  200 . 
     The mechanical arm can move the transport  100  above the hole of the workpiece. The air supply can supply air to the second tracheal joint  27 , and the air can pass through the groove  4133 , the second blind vent  4131 , the second through vent  615 , and the air vent  6332  to the rubber plug  200 . Then, the air can hold the rubber plug  200 , and can stop the rubber plug  200  from moving from a predetermined position when the ejection portion  633  retracts into the receiving cavity  651 . The air supply can extract air via the first tracheal joint  23 , and the vacuum formed by the extracting air can push the elastic member  67  and the second main body  453 . The first piston assembly  41  and the second piston assembly  45  can move away from the guide base  65 . The ejection portion  633  can retract into the receiving cavity  651 . The guide base  65  can resist against the rubber plug  200 , and allow the rubber plug  200  to be placed in the hole of the workpiece. 
     In one embodiment, the first blind vent  213  and the first through vent  251  can be straight vents, and the first flange  413  and the second flange  452  can be omitted. In one embodiment, the first housing  21  can be integrated with the second housing  25  to form the housing  20 . In one embodiment, the first piston assembly  41 , the second piston assembly  45 , and the sealing base  61  can be integrated to form the piston assembly  40 . In one embodiment, the sealing base  61  can be omitted, and the connecting portion  631  can be coupled to the inside wall of the second piston assembly  45  by the screw thread  6311 . 
     The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of a transport  100 . Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.