Linear Table Structure

Abstract

A linear table structure comprises a groove body, a first screw, a second screw, two sliding seats, and a connecting calibrating assembly. One end of the first screw and that of the second screw are connected and supported by the connecting calibrating assembly, and the positioning portion of the connecting calibrating assembly is used to adjust the pitch error generated on the first and second screws by the sliding seats, thus reducing machining time and cost.

1 . A linear table structure comprising:
 a groove body defined with a receiving space;   a first screw formed on its outer surface with a first threaded section;   a second screw formed on its outer surface with a second threaded section;   two sliding seats each including a base and a nut, the nut being fixed to a side of the base, so that the sliding seats are fixed to the first threaded section of the first screw and the second threaded section of the second screw, respectively, by the nuts;   a connecting calibrating assembly being formed at each end thereof with a positioning portion, one end of the first screw and the second screw are connected to the positioning portions of the connecting calibrating assembly, respectively, the other end of the first screw and the second screw are pivotally disposed in the receiving space of the groove body, the sliding seats utilize the positioning portion of the connecting calibrating assembly to do tension adjustment, thus rotating the first and second screws to adjust pitch error of the sliding seats.   
   
   
       2 . The linear table structure as claimed in  claim 1 , wherein the first screw further includes a first pivot portion and a first connecting portion, the first pivot portion is formed at one end of the first screw, and the first connecting portion is formed at the other end of the first screw;
 the second screw further includes a second pivot portion and a second connecting portion, the second pivot portion is formed at one end of the second screw, and the second connecting portion is formed at the other end of the second screw, the first connecting portion of the first screw and the second connecting portion of the second screw are connected to the positioning portion of the connecting calibrating assembly, the first pivot portion of the first screw and the second pivot portion of the second screw are pivotally disposed on an inner surface of both sides of the groove body, so that the first and second screws are disposed in the receiving space of the groove body.   
   
   
       3 . The linear table structure as claimed in  claim 2 , wherein the positioning portions includes an inserting groove, a positioning hole, and a restricting member;
 the inserting groove is axially defined in the positioning portion for insertion of the first connecting portion of the first screw and the second connecting portion of the second screw, respectively;   the positioning hole formed with inner threads is radially defined in an outer surface of the positioning portion and is in communication with the inserting groove; and   the restricting member formed with outer threads is pressed against the first connecting section of the first screw and the second connecting section of the second screw by screwing through positioning hole.   
   
   
       4 . The linear table structure as claimed in  claim 3 , wherein an assistant member is pivotally mounted on the first threaded portion of the screw and located beside the first pivot connection to form a single support point on the groove body. 
   
   
       5 . The linear table structure as claimed in  claim 3 , wherein an assistant member is pivotally mounted on the second threaded portion of the second screw and located beside the second pivot portion to form a single support point on the groove body. 
   
   
       6 . The linear table structure as claimed in  claim 3 , wherein an assistant member is mounted on each of the first threaded portion of the screw and the second threaded portion of the second screw located beside the first and second pivot portions. 
   
   
       7 . The linear table structure as claimed in  claim 3  further comprising an assistant member, and the assistant member is a bearing. 
   
   
       8 . The linear table structure as claimed in  claim 3 , wherein the connecting calibrating assembly further includes a C-shaped retainer, a pulling member, a pivot, a screw, and a nut, the C-shaped retainer is formed at either end of the connecting calibrating assembly for insertion of the first and second screws, respectively, one end of the pulling member is pivotally connected at one end of the screw of the connecting calibrating assembly by the pivot, the screw of the connecting calibrating assembly is inserted through both ends of the C-shaped retainer, and the pulling member is disposed on the C-shaped retainer, one end of the screw of the connecting calibrating assembly is exposed out of the C-shaped retainer so as to screw with the nut, such that both ends of the C-shaped retainer are limited by the pulling member and the nut. 
   
   
       9 . The linear table structure as claimed in  claim 8 , wherein an assistant member is pivotally mounted on the first threaded portion of the screw and located beside the first pivot connection to form a single support point on the groove body. 
   
   
       10 . The linear table structure as claimed in  claim 8 , wherein an assistant member is pivotally mounted on the second threaded portion of the second screw and located beside the second pivot portion to form a single support point on the groove body. 
   
   
       11 . The linear table structure as claimed in  claim 8 , wherein an assistant member is mounted on each of the first threaded portion of the screw and the second threaded portion of the second screw located beside the first and second pivot portions. 
   
   
       12 . The linear table structure as claimed in  claim 8  further comprising an assistant member, and the assistant member is a bearing.