Tool for testing axial clearance between trapezoidal screw rod and processing nut

Abstract

The utility model discloses a tool for testing the axial clearance between a trapezoidal screw rod and a processing nut, which comprises a horizontally arranged workbench, supporting legs which are arranged at the same height are connected below the workbench, and a first slide rail is arranged on the top of the workbench along the central line of the length direction. The right side of the first sliding rail is provided with a second sliding rail which is symmetrically arranged relative to the first sliding rail, the first sliding rail is provided with a motor assembly, the motor assembly comprises a trapezoidal lead screw at the output end of a motor and a machining nut installed on the trapezoidal lead screw, and the tail end of the trapezoidal lead screw is provided with a dial indicator installed on the first sliding rail; a thrust meter is installed on the second sliding rail, and a position adjusting mechanism is connected to the lower portion of the thrust meter. After the thrust meter applies force to the motor, the value of the axial displacement generated between the processing nut and the trapezoidal screw rod is displayed on the dial indicator on the right side, the whole structure is simple, the production cost is low, the operation is convenient, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of axial clearance testing, in particular to an axial clearance testing tooling for a trapezoidal lead screw and a machined nut. Background Technique

[0002] The lead screw, also known as the ball screw, is the most commonly used transmission component in machine tools and precision machinery. Its main function is to convert rotational motion into linear motion, or convert torque into axial reciprocating force, and at the same time has the characteristics of high precision, reversibility and high efficiency. The nut is a screw cap, a part used to tighten together with a bolt or a screw rod. According to different materials, it can be divided into several major types such as carbon steel, stainless steel, non-ferrous metals (such as copper), etc. Since the lead screw and the nut are used in a matching manner, it is necessary to test the axial clearance of the lead screw and nut pair to prevent the clearance from being too large or too small to be used in cooperation. However, the current test bench has a complex structure and cumbersome operation, resulting in a slow test speed and affecting the detection efficiency. Content of the Utility Model

[0003] According to the above technical problems to be solved, an axial clearance testing tooling for a trapezoidal lead screw and a machined nut is provided.

[0004] To achieve the above object, the utility model discloses an axial clearance testing tooling for a trapezoidal lead screw and a machined nut, which includes a horizontally arranged workbench. Support feet with equal height are connected below the workbench. A first slide rail is installed on the center line along the length direction of the top of the workbench. A second slide rail symmetrically arranged with respect to the first slide rail is installed on the right side of the first slide rail. A motor assembly is installed on the first slide rail. The motor assembly includes a trapezoidal lead screw at the output end of the motor and a machined nut installed on the trapezoidal lead screw. A dial indicator installed on the first slide rail is arranged at the end of the trapezoidal lead screw. A thrust meter is installed on the second slide rail, and a position adjusting mechanism is connected below the thrust meter.

[0005] Further, at least two groups of first sliders are arranged on the first slide rail. A first bracket and a third bracket are respectively fixed on the tops of the first sliders. A motor is installed on the top of the first bracket, and a dial indicator is installed on the top of the third bracket. A second bracket fixed on the workbench is arranged between the first bracket and the third bracket.

[0006] Furthermore, a U-shaped groove is formed on the top of the second bracket for positioning the machined nut.

[0007] Furthermore, second sliders are symmetrically installed on the second slide rail. A support plate is connected to the top of the second slider. The top of the support plate is fixedly connected to the thrust meter. A threaded push rod is connected to the side of the thrust meter close to the motor.

[0008] Further, a rectangular through hole is formed in the workbench between the second slide rails.

[0009] Further, the position adjusting mechanism includes a lead screw assembly installed at the bottom of the support plate, and the end of the lead screw assembly is connected with a hand wheel located on the side of the workbench.

[0010] Further, a positioning hole is formed at one end of the motor away from the trapezoidal lead screw, and the push rod of the thrust gauge is coaxially installed with the positioning hole.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model discloses an axial clearance testing tooling for a trapezoidal lead screw and a processing nut. After the thrust gauge applies a force to the motor, the axial displacement generated between the processing nut and the trapezoidal lead screw is displayed on the dial indicator on the right side. The overall structure is simple, the production cost is low, the operation is convenient, and the detection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0014] Figure 2 It is a schematic diagram of the installation of the position adjusting mechanism of the present utility model.

[0015] Figure 3 It is a schematic diagram of the installation of the motor assembly and the dial indicator of the present utility model.

[0016] Figure 4 It is a schematic diagram of the structure of the generator assembly of the present utility model.

[0017] Figure 5 It is a schematic diagram of the first support of the present utility model.

[0018] Figure 6 It is a schematic diagram of the second support of the present utility model.

[0019] In the figure: 1 is the workbench; 2 is the support foot; 3 is the first slide rail; 31 is the first slider; 4 is the second slide rail; 41 is the second slider; 5 is the motor assembly; 51 is the motor; 52 is the trapezoidal lead screw; 53 is the processing nut; 54 is the positioning hole; 6 is the dial indicator; 7 is the first support; 8 is the third support; 9 is the second support; 10 is the thrust gauge; 101 is the push rod; 11 is the support plate; 12 is the position adjusting mechanism; 13 is the hand wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] An embodiment of the present invention is as follows Figure 1 and Figure 2 As shown, support feet 2 with the same height are connected below the workbench 1. A first slide rail 3 is installed on the midline of the top of the workbench 1 along the length direction. A second slide rail 4 symmetrically arranged with respect to the first slide rail 3 is installed on the right side of the first slide rail 3. A motor assembly 5 is installed on the first slide rail 3. The motor assembly 5 includes a trapezoidal lead screw 52 at the output end of the motor 51 and a processing nut 53 installed on the trapezoidal lead screw 52. A dial indicator 6 installed on the first slide rail 3 is arranged at the end of the trapezoidal lead screw 52. A thrust gauge 10 is installed on the second slide rail 4. A position adjustment mechanism 12 is connected below the thrust gauge 10. After the thrust gauge applies a force to the motor, the axial displacement generated between the processing nut and the trapezoidal lead screw is displayed on the dial indicator on the right side. The overall structure is simple, the production cost is low, the operation is convenient, and the detection efficiency is improved.

[0022] At least two groups of first sliders 31 are arranged on the first slide rail 3. A first bracket 7 and a third bracket 8 are respectively fixed to the tops of the first sliders 31. The motor 51 is installed on the top of the first bracket 7, and the dial indicator 6 is installed on the top of the third bracket 8, which is convenient for adjusting the positions of the motor 51 and the dial indicator 6 to meet the testing of lead screws of different specifications. A second bracket 9 fixed to the workbench 1 is arranged between the first bracket 7 and the third bracket 8.

[0023] A U-shaped groove is provided at the top of the second bracket 9 to position the processing nut 53, ensuring that the processing nut 53 will not shift during the test and affect the test results.

[0024] Second sliders 41 are symmetrically installed on the second slide rail 4. A support plate 11 is connected to the tops of the second sliders 41. The top of the support plate 11 is fixedly connected to the thrust gauge 10. A threaded push rod 101 is connected to the side of the thrust gauge 10 close to the motor 51. Specifically, the thrust gauge 10 adopts a digital display thrust gauge with a specification of SF2-500N, ensuring an error of ±0.5% and real-time displaying the magnitude of the force applied to the motor assembly 5.

[0025] A rectangular through-hole is formed on the workbench 1 between the second slide rails 4 for installing the position adjusting mechanism 12. The position adjusting mechanism 12 includes a lead screw assembly installed at the bottom of the support plate 11. The end of the lead screw assembly is connected to a hand crank 13 located on the side of the workbench 1. By manually rotating the hand crank 13 by the staff, the position adjusting mechanism 12 is displaced horizontally to drive the thrust gauge 10 to move on the second slide rail 4.

[0026] A positioning hole 54 is formed at one end of the motor 51 away from the trapezoidal lead screw 52. The push rod 101 of the thrust gauge 10 is coaxially installed with the positioning hole 54. During the movement of the thrust gauge 10, the push rod 101 abuts against the deep part of the positioning hole 54 on the motor 51, which is convenient for adapting to the testing of motor lead screws of different specifications and improving the testing response speed.

[0027] The working principle of this embodiment: Install the processing nut to be tested on the trapezoidal lead screw of the motor. The processing nut is clamped on the second bracket. Adjust the first bracket according to the position of the motor to meet the installation conditions. At the same time, make the detection head of the dial indicator contact the end of the trapezoidal lead screw and the reading shows 0. Manually rotate the hand crank to adjust the position of the thrust gauge, so that the push rod extends into the positioning hole and contacts the motor. The thrust gauge sets the magnitude of the applied force and acts on the motor. The axial displacement generated between the processing nut and the trapezoidal lead screw is displayed on the dial indicator to complete the test.

[0028] The following points need to be explained: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the internal communication of two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change; Second, in this article, relational terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities.

[0029] The above examples are only illustrative examples of the present invention and do not constitute a limitation on the protection scope of the present invention. Any design identical or similar to the present invention belongs to the protection scope of the present invention.

Claims

1. Axial clearance testing tooling for a trapezoidal lead screw and a machined nut, comprising a horizontally arranged workbench (1), characterized in that, A support foot (2) with the same height is connected below the workbench (1). A first slide rail (3) is installed on the midline along the length direction of the top of the workbench (1). A second slide rail (4) symmetrically arranged with respect to the first slide rail (3) is installed on the right side of the first slide rail (3). A motor assembly (5) is installed on the first slide rail (3). The motor assembly (5) includes a trapezoidal lead screw (52) at the output end of a motor (51) and a processing nut (53) installed on the trapezoidal lead screw (52). A dial indicator (6) installed on the first slide rail (3) is arranged at the end of the trapezoidal lead screw (52). A thrust meter (10) is installed on the second slide rail (4), and a position adjusting mechanism (12) is connected below the thrust meter (10).

2. The axial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 1, characterized in that, At least two groups of first sliders (31) are arranged on the first slide rail (3). A first bracket (7) and a third bracket (8) are respectively fixed to the tops of the first sliders (31). A motor (51) is installed on the top of the first bracket (7), and a dial indicator (6) is installed on the top of the third bracket (8). A second bracket (9) fixed to the workbench (1) is arranged between the first bracket (7) and the third bracket (8).

3. The axial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 2, characterized in that, A U-shaped groove is formed at the top of the second bracket (9) to position the processing nut (53).

4. The axial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 1, characterized in that, Second sliders (41) are symmetrically installed on the second slide rail (4). A support plate (11) is connected to the top of the second slider (41). The top of the support plate (11) is fixedly connected to the thrust meter (10). A threaded push rod (101) is connected to one side of the thrust meter (10) close to the motor (51).

5. The axial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 4, characterized in that, A rectangular through hole is formed in the workbench (1) between the second slide rails (4).

6. The axial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 1, characterized in that The position adjusting mechanism (12) includes a lead screw assembly installed at the bottom of the support plate (11), and a hand wheel (13) located on the side of the workbench (1) is connected to the end of the lead screw assembly.

7. The axial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 1, characterized in that, A positioning hole (54) is formed at one end of the motor (51) away from the trapezoidal lead screw (52), and the push rod (101) of the thrust meter (10) is coaxially installed with the positioning hole (54).

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