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CN-121994110-A - Thread raceway pitch diameter measuring tool of ball screw nut

CN121994110ACN 121994110 ACN121994110 ACN 121994110ACN-121994110-A

Abstract

The invention discloses a pitch diameter measuring tool for a threaded raceway of a ball screw nut, which comprises a moving block and a measuring frame, wherein the moving block is arranged in the measuring frame in a sliding mode, the moving assembly comprises a first sliding rod, a first sliding sleeve, a second sliding rod and a second sliding sleeve, the first sliding rod is vertically arranged in the measuring frame and penetrates through the moving block, the first sliding sleeve is arranged on the first sliding rod in a sliding mode and is connected with the moving block in a sleeved mode, the second sliding rod is vertically arranged in the measuring frame and fixedly inserted into the moving block, the second sliding sleeve is arranged at the lower end of the second sliding rod in a sleeved mode and is connected with the bottom of the measuring frame, the measuring head assembly comprises a first measuring head, a second measuring head and an elastic piece, the first measuring head and the second measuring head are symmetrically arranged, the first measuring head is arranged on the moving block, the second measuring head is arranged on the measuring frame, the elastic piece is clamped between the first measuring head and the second measuring head, and the measuring rod of a dial indicator stretches into the measuring frame and is coaxially arranged with the second sliding rod.

Inventors

  • YU HUI
  • XU JINGJING
  • Li Mandi
  • Ren Zhiyao

Assignees

  • 湖北双林轴承有限公司

Dates

Publication Date
20260508
Application Date
20260302

Claims (7)

  1. 1. The middle diameter measuring tool for the threaded rollaway nest of the ball screw nut is characterized by comprising a mounting base structure, a measuring base structure and a measuring base, wherein the mounting base structure comprises a moving block (1) and a measuring frame (2), and the moving block (1) is slidably arranged in the measuring frame (2); The moving assembly (3), the moving assembly (3) comprises a first sliding rod (31), a first sliding sleeve (32), a second sliding rod (33) and a second sliding sleeve (34), the first sliding rod (31) is vertically arranged in the measuring frame (2) and penetrates through the moving block (1), the first sliding sleeve (32) is arranged on the first sliding rod (31) in a sliding mode and is connected with the moving block (1), the second sliding rod (33) is vertically arranged in the measuring frame (2) and fixedly inserted on the moving block (1), the second sliding sleeve (34) is sleeved at the lower end of the second sliding rod (33) and is connected with the bottom of the measuring frame (2), the length of the second sliding rod (33) is shorter than that of the first sliding rod (31), The measuring head assembly (4), the measuring head assembly (4) comprises a first measuring head (41), a second measuring head (42) and an elastic piece (43), the first measuring head (41) and the second measuring head (42) are symmetrically arranged, the first measuring head (41) is arranged on the moving block (1), the second measuring head (42) is arranged on the measuring frame (2), and the elastic piece (43) is clamped between the first measuring head (41) and the second measuring head (42); The dial indicator (5), the measuring rod (51) of the dial indicator (5) stretches into the measuring frame (2) and is coaxially arranged with the second sliding rod (33).
  2. 2. A ball screw nut threaded raceway pitch diameter gauge according to claim 1, characterized in that the moving block (1) is provided with a moving handle (7) extending to the outside of the measuring frame (2), and the second sliding sleeve (34) is fixedly provided with a fixed handle (6) extending to the outside of the measuring frame (2).
  3. 3. A gauge for the pitch diameter of the threaded raceway of a ball screw nut according to claim 1, characterized in that the first gauge head (41) includes a first mounting portion (411), a first support portion (412) and a first arc plate (413), the first mounting portion (411) is connected with the moving block (1), the first support portion (412) is connected to one side of the first mounting portion (411), the first arc plate (413) is mounted on the upper surface of the first support portion (412), and a first flange (414) is formed on the first arc plate (413) in a protruding manner.
  4. 4. A ball screw nut threaded raceway pitch diameter gauge according to claim 3, characterized in that the second gauge head (42) comprises a second mounting portion (421), a second supporting portion (422) and a second arc plate (423), the bottom of the measuring frame (2) is fixedly provided with a fixed block (21), the second sliding sleeve (34) is arranged in the fixed block (21), the second mounting portion (421) is connected with the fixed block (21), the second supporting portion (422) is connected to one side of the second mounting portion (421), the second arc plate (423) is arranged on the lower surface of the second supporting portion (422), and a second flange (424) is formed on the second arc plate (423) in a protruding mode.
  5. 5. A ball screw nut threaded raceway pitch diameter gauge as claimed in claim 3, characterized in that the first arcuate plate (413) is provided with a first placement hole (415) along the first flange (414), a first steel ball (416) is placed in the first placement hole (415), the second arcuate plate (423) is provided with a second placement hole (425) along the second flange (424), and a second steel ball (426) is placed in the second placement hole (425).
  6. 6. A ball screw nut threaded raceway pitch diameter gauge as claimed in claim 3, characterized in that the first support portion (412) is provided with a first screw hole (4121) and a first mounting groove (4122), the first arc plate (413) is provided with an upper screw hole (4131) and an upper mounting hole (4132), a screw passes through the first screw hole (4121) and the upper screw hole (4131), a locating pin passes through the upper mounting hole (4132) and the first mounting groove (4122), the first arc plate (413) is mounted on the first support portion (412), the second support portion (422) is provided with a second screw hole (4221) and a second mounting groove, the second arc plate (423) is provided with a lower screw hole (4231) and a lower mounting hole (4232), a screw passes through the second screw hole (4221) and the lower mounting hole (4231), a locating pin passes through the lower mounting hole (4232) and the second mounting groove, and is mounted on the first support portion (412).
  7. 7. The ball screw nut threaded raceway pitch diameter gauge according to claim 1, further comprising a fixing sleeve (8), wherein the fixing sleeve (8) is mounted on the measuring frame (2), and a measuring rod (51) of the dial indicator (5) is inserted into the fixing sleeve (8).

Description

Thread raceway pitch diameter measuring tool of ball screw nut Technical Field The invention relates to the technical field of ball screw measurement, in particular to a diameter measuring tool in a threaded raceway of a ball screw nut. Background The ball screw pair is a key component of precise transmission, the sliding friction of the traditional sliding screw is thoroughly replaced by rolling friction, the ball screw pair is widely used in automatic and precise equipment, the pitch diameter size of a thread raceway of the ball screw pair influences the assembly clearance and the pretightening force value of the ball screw, and the clearance and the pretightening force value directly influence the precision of a ball screw finished product, so that the ball screw pair is extremely important. In order to ensure the precision of the ball screw pair, a measuring tool is often used for measuring the ball screw pair. The measurement methods commonly used at present have the following problems: 1. the steel ball adding measuring method has the advantages that the measuring process is complex, the efficiency is low, the measuring result needs complex calculation, the requirement on operators is high, and miscalculation often occurs, so that the product batch is poor; 2. The general measuring tool (such as the improvement of an inside dial indicator 5) is used for measuring that the upper measuring head and the lower measuring head are stuck or welded with steel balls, the scheme is easy to deflect and measure and inaccurate in positioning, the measuring repeatability is poor, and the precision cannot be ensured; 3. large-scale precise instruments (such as three-coordinate measuring machine) are expensive in equipment, harsh in environmental requirements, long in detection period and not suitable for quick inspection on production sites. Therefore, there is a need to design a new gauge for the pitch diameter of the thread groove of the ball screw nut to overcome the above-mentioned drawbacks. Disclosure of Invention The invention aims to provide a middle diameter measuring tool for a threaded raceway of a ball screw nut, which has the advantages of small and convenient structural design, high measuring precision, simple operation, high positioning precision and high detection efficiency, is far lower in manufacturing and maintenance cost than a large-scale precise measuring instrument, is convenient to popularize and apply, and can adapt to the measuring requirements of ball screw pairs with different specifications by replacing measuring heads with different sizes or adjusting positioning parts. In order to achieve the above object, the present invention provides a gauge for a pitch diameter of a thread raceway of a ball screw nut, comprising a mounting base structure including a moving block and a measuring frame, the moving block being slidably mounted in the measuring frame; The moving assembly comprises a first sliding rod, a first sliding sleeve, a second sliding rod and a second sliding sleeve, wherein the first sliding rod is vertically arranged in the measuring frame and penetrates through the moving block, the first sliding sleeve is arranged on the first sliding rod in a sliding mode and connected with the moving block, the second sliding rod is vertically arranged in the measuring frame and fixedly inserted on the moving block, the second sliding sleeve is arranged at the lower end of the second sliding rod in a sleeved mode and connected with the bottom of the measuring frame, the length of the second sliding rod is shorter than that of the first sliding rod, The measuring head assembly comprises a first measuring head, a second measuring head and an elastic piece, wherein the first measuring head and the second measuring head are symmetrically arranged, the first measuring head is arranged on the moving block, the second measuring head is arranged on the measuring frame, and the elastic piece is clamped between the first measuring head and the second measuring head; the measuring rod of the dial indicator stretches into the measuring frame and is coaxially arranged with the second sliding rod. Preferably, the moving block is provided with a moving handle extending to the outside of the measuring frame, and the second sliding sleeve is fixedly provided with a fixed handle extending to the outside of the measuring frame. Preferably, the first measuring head comprises a first mounting part, a first supporting part and a first arc plate, wherein the first mounting part is connected with the moving block, the first supporting part is connected to one side of the first mounting part, the first arc plate is arranged on the upper surface of the first supporting part, and a first flange is formed on the first arc plate in a protruding mode. Preferably, the second measuring head comprises a second mounting part, a second supporting part and a second arc plate, a fixed block is fixedly arranged at the bottom