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CN-224223365-U - Numerical control lathe screw nut pair clearance elimination mechanism

CN224223365UCN 224223365 UCN224223365 UCN 224223365UCN-224223365-U

Abstract

The utility model relates to the technical field of numerical control machine tools and discloses a gap eliminating mechanism of a numerical control lathe screw nut pair, which comprises a base, wherein two baffles are fixedly connected to the surface of the base, a screw is rotatably connected to the surface of the baffles, a nut is connected to the middle of the surface of the screw in a threaded manner, a pre-tightening mechanism is arranged on one side of the nut, a connecting plate is connected to the bottom of the pre-tightening mechanism in a sliding manner, an adjusting mechanism is fixedly connected to one side of the connecting plate, and a graduated scale is arranged on the surface of the connecting plate. This vice clearance elimination mechanism of numerical control lathe lead screw nut through the setting of pretension mechanism, when using, all is provided with pretension spring and pretension piece in nut both sides, utilizes the pretension spring of pretension piece extrusion one side, effectively eliminates the clearance between lead screw and the nut, improves transmission precision, adopts two-way pretension structure, ensures that the lead screw homoenergetic keeps stable pretightning force when just reversing, avoids appearing the idle running error.

Inventors

  • LIAO JIAN
  • WANG LIANG
  • LIU FAHUI
  • LI CONG

Assignees

  • 襄阳正文科技有限公司

Dates

Publication Date
20260512
Application Date
20250521

Claims (7)

  1. 1. The gap eliminating mechanism for the screw-nut pair of the numerical control lathe comprises a base (1) and is characterized in that two baffles (2) are fixedly connected to the surface of the base (1), a screw rod (3) is rotatably connected to the surface of the baffles (2), a nut (4) is connected to the middle part of the surface of the screw rod (3) in a threaded manner, a pre-tightening mechanism (5) is arranged on one side of the nut (4), a connecting plate (6) is connected to the bottom of the pre-tightening mechanism (5) in a sliding manner, an adjusting mechanism (7) is fixedly connected to one side of the connecting plate (6), a graduated scale (8) is arranged on the surface of the connecting plate (6), The pre-tightening mechanism (5) comprises a pre-tightening spring (501) arranged on one side of the nut (4), and a pre-tightening block (502) is fixedly connected to one side of the pre-tightening spring (501); The adjusting mechanism (7) comprises a support (701) fixedly connected to one side of the connecting plate (6), a threaded rod (702) is connected to the upper surface of the support (701) in a threaded mode, a rotating handle (703) is fixedly connected to one end of the threaded rod (702), and the other end of the threaded rod (702) is lapped on the surface of the pre-tightening block (502).
  2. 2. The mechanism for eliminating the clearance of the screw-nut pair of the numerically controlled lathe is characterized in that a through hole is formed in the surface of the pre-tightening block (502), and the screw rod (3) penetrates through the through hole.
  3. 3. The clearance elimination mechanism for the screw-nut pair of the numerically controlled lathe is characterized in that an I-shaped block (14) is fixedly connected to the bottom of the pre-tightening block (502), and the I-shaped block (14) is slidably connected to the surface of the connecting plate (6) and provided with an I-shaped groove.
  4. 4. The clearance eliminating mechanism for the screw nut pair of the numerically controlled lathe is characterized in that a pointer (9) is fixedly connected to one side of the connecting plate (6), and the pointer (9) is connected to the surface of a graduated scale (8) in a sliding way.
  5. 5. The clearance eliminating mechanism for the screw-nut pair of the numerically controlled lathe is characterized in that a driving motor (10) is fixedly connected to one side of the screw rod (3), and a motor box (11) is fixedly connected to the surface of the driving motor (10).
  6. 6. The clearance eliminating mechanism for the screw-nut pair of the numerically controlled lathe is characterized in that a placing plate (12) is connected to the top of the nut (4) in a threaded mode, limiting holes are formed in two sides of the placing plate (12), and a limiting rod (13) is connected to the inside of each limiting hole in a sliding mode.
  7. 7. The clearance eliminating mechanism for the screw nut pair of the numerically controlled lathe is characterized in that four positioning holes are formed in two sides of the surface of the base (1), and the positioning holes are connected to an external connecting structure through bolts.

Description

Numerical control lathe screw nut pair clearance elimination mechanism Technical Field The utility model relates to the technical field of numerical control machine tools, in particular to a clearance eliminating mechanism for a screw nut pair of a numerical control lathe. Background In a numerically controlled lathe, a screw nut pair is a key component of a transmission system, and the accuracy of the screw nut pair directly influences the machining accuracy of the lathe. Because of long-term use or manufacturing errors, gaps can be generated between the screw rod and the nut, so that idle stroke errors occur in the transmission process, and the machining precision is affected. The existing clearance elimination methods usually adopt a pre-tightening nut or an elastic element for compensation, but the methods have the problems of complex adjustment, poor stability and the like. Therefore, the gap eliminating mechanism with simple structure, convenient adjustment and high stability is designed to have important significance. Disclosure of utility model (One) solving the technical problems The utility model aims to provide a clearance elimination mechanism of a screw-nut pair of a numerical control lathe, which aims to solve the problems that in the prior art, the existing clearance elimination method is usually adopted to compensate by adopting a pre-tightening nut or an elastic element, but the methods have the problems of complex adjustment, poor stability and the like. (II) technical scheme The numerical control lathe screw nut pair gap eliminating mechanism comprises a base, wherein two baffles are fixedly connected to the surface of the base, a screw rod is rotatably connected to the surface of the baffles, a nut is connected to the middle of the surface of the screw rod in a threaded mode, a pre-tightening mechanism is installed on one side of the nut, a connecting plate is connected to the bottom of the pre-tightening mechanism in a sliding mode, an adjusting mechanism is fixedly connected to one side of the connecting plate, a graduated scale is installed on the surface of the connecting plate, the pre-tightening mechanism comprises a pre-tightening spring installed on one side of the nut, a pre-tightening block is fixedly connected to one side of the pre-tightening spring, the adjusting mechanism comprises a support fixedly connected to one side of the connecting plate, a threaded rod is connected to the upper surface of the support in a threaded mode, one end of the threaded rod is fixedly connected with a rotating handle, and the other end of the threaded rod is lapped on the surface of the pre-tightening block. As a further scheme of the utility model, through holes are formed in the surface of the pre-tightening block, the screw rod penetrates through the through holes, and the pre-tightening spring is extruded through the arrangement of the pre-tightening block. As a further scheme of the utility model, the bottom of the pre-tightening block is fixedly connected with the I-shaped block, the I-shaped block is slidably connected in the I-shaped groove formed in the surface of the connecting plate, and the I-shaped groove is arranged to limit the I-shaped block. As a further scheme of the utility model, one side of the connecting plate is fixedly connected with a pointer, the pointer sliding connection port is arranged on the surface of the graduated scale, and the function of conveniently observing the deformation degree of the pre-tightening spring is achieved through the arrangement of the pointer. As a further scheme of the utility model, one side of the screw rod is fixedly connected with a driving motor, the surface of the driving motor is fixedly connected with a motor box, and the screw rod is driven to rotate through the arrangement of the driving motor. As a further scheme of the utility model, the top thread of the nut is connected with the placing plate, both sides of the placing plate are provided with limiting holes, the inside of each limiting hole is connected with a limiting rod in a sliding manner, and the limiting rod is arranged to limit the placing plate. As a further scheme of the utility model, four positioning holes are formed in two sides of the surface of the base, the positioning holes are connected to an external connecting structure through bolts, and the fixing device is realized through the arrangement of the positioning holes. (III) beneficial effects The utility model provides a clearance eliminating mechanism for a screw nut pair of a numerically controlled lathe, which has the following beneficial effects: 1. This vice clearance elimination mechanism of numerical control lathe lead screw nut through the setting of pretension mechanism, when using, all is provided with pretension spring and pretension piece in nut both sides, utilizes the pretension spring of pretension piece extrusion one side, effectively eliminates the clearance between lead screw and the nut,