Radial clearance testing tool for trapezoidal screw rod and processing nut

Abstract

The utility model discloses a tool for testing the radial clearance between a trapezoidal screw rod and a processing nut, which comprises a testing tool body, the testing tool body comprises a bottom plate located at the lowest part, the upper part of the bottom plate is connected with a mounting plate through four groups of supporting section bars which are vertically arranged, the surface of the mounting plate is provided with a positioning groove which is transversely arranged, and the positioning groove is connected with the bottom plate. A jacking mechanism is arranged between the mounting plate and the bottom plate, guide rods which penetrate through the mounting plate and are fixed to the bottom plate are arranged on the outer sides of the supporting blocks, the two guide rods are vertically mounted, the tops of the two guide rods are fixedly connected through a top plate, a movable plate is mounted between the top plate and the mounting plate, and a dial indicator is mounted on the movable plate. The lead screw is positioned through the supporting blocks with the V-shaped grooves, the structure is simple, the testing efficiency is high, and the radial precision of the lead screw in use is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of radial clearance testing, in particular to a radial clearance testing tool for a trapezoidal lead screw and a processing nut. Background Art

[0002] A lead screw consists of a screw and nut that work together. To ensure the lead screw meets precision requirements, the radial clearance between the screw and nut must be within a certain range; otherwise, the lead screw will not meet precision requirements. Therefore, the radial clearance of the lead screw must be tested after production or after a period of use (the clearance may change due to wear during use) to ensure the lead screw's accuracy.

[0003] Existing detection devices are unable to effectively position the screw rod when detecting the radial clearance of the screw rod, resulting in a large deviation in the radial detection accuracy of the screw rod, and thus unable to guarantee the radial accuracy of the screw rod when in use. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, a radial clearance testing tool for a trapezoidal lead screw and a processing nut is provided.

[0005] To achieve the above-mentioned purpose, the utility model discloses a radial clearance testing tool for a trapezoidal screw and a processed nut, including a testing tool body, wherein the testing tool body includes a bottom plate located at the bottom, a mounting plate is connected above the bottom plate through four groups of vertically arranged supporting profiles, a horizontally arranged positioning groove is opened on the surface of the mounting plate, two groups of symmetrically arranged support blocks are installed in the positioning groove, a lifting mechanism is provided between the mounting plate and the bottom plate, a guide rod is provided on the outside of the support block, the two guide rods are vertically installed and the tops are fixedly connected by a top plate, a movable plate is installed between the top plate and the mounting plate, and a dial indicator is installed on the movable plate.

[0006] Furthermore, the lifting mechanism includes a bearing seat fixed to the bottom of the mounting plate, a threaded sleeve is provided below the bearing seat, a rotating wheel is fixedly connected to the outside of the threaded sleeve, a lifting screw is provided inside the threaded sleeve, and a lifting block is connected to the top of the lifting screw.

[0007] Furthermore, a through hole is provided at a center position of the jacking block corresponding to the mounting plate, and the jacking block is slidably arranged in the through hole.

[0008] Furthermore, the support block is an I-shaped structure, a V-shaped groove is provided on the top surface of the support block, and a groove with a rectangular cross section is provided on the bottom of the V-shaped groove.

[0009] Furthermore, the support block is fixed in the positioning groove by bolts and is symmetrically arranged about the central axis of the jacking block. A trapezoidal screw rod and a processing nut are installed on the top of the support block.

[0010] Further, a sliding block sleeved on the guide rod is connected to the bottom of the movable plate, and the dial indicator, the processing nut and the jacking block are arranged corresponding to each other in the vertical direction.

[0011] The beneficial effects produced by the present utility model compared with the prior art: The present utility model discloses a radial clearance test tooling for a trapezoidal lead screw and a processing nut. The lead screw is positioned by a support block with a V-shaped groove, which has a simple structure, high test efficiency, and ensures the radial accuracy of the lead screw during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described in detail below in conjunction with 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 the front view of the present utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the support block of the present utility model.

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

[0017] In the figure: 1 is the bottom plate; 2 is the support profile; 3 is the mounting plate; 31 is the positioning groove; 4 is the jacking mechanism; 41 is the bearing seat; 42 is the threaded sleeve; 43 is the lifting lead screw; 44 is the jacking block; 45 is the rotating wheel; 5 is the support block; 6 is the trapezoidal lead screw; 61 is the processing nut; 7 is the guide rod; 8 is the movable plate; 9 is the top plate; 10 is the dial indicator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] An embodiment of the present utility model is as Figure 1 and Figure 2 shown. The test tooling body includes a bottom plate 1 located at the bottommost, and a mounting plate 3 is connected above the bottom plate 1 through four groups of vertically arranged support profiles 2, as Figure 4As shown, a positioning groove 31 arranged horizontally is formed on the surface of the mounting plate 3. Two groups of symmetrically arranged support blocks 5 are installed in the positioning groove 31. A jacking mechanism 4 is arranged between the mounting plate 3 and the bottom plate 1. Guide rods 7 passing through the mounting plate 3 and fixed on the bottom plate 1 are arranged outside the support blocks 5. The two guide rods 7 are vertically installed and fixedly connected at the top through a top plate 9. A movable plate 8 is installed between the top plate 9 and the mounting plate 3. A dial indicator 10 is installed on the movable plate 8. The lead screw is positioned by the support block with a V-shaped groove. The structure is simple, the testing efficiency is high, and the radial accuracy of the lead screw during use is ensured.

[0020] As Figure 2 shown, the jacking mechanism 4 includes a bearing seat 41 fixed to the bottom of the mounting plate 3. A threaded sleeve 42 is arranged below the bearing seat 41. Bearing structures are installed at both the upper and lower ends of the threaded sleeve 42 to ensure that the threaded sleeve 42 can rotate smoothly. A rotating wheel 45 is fixedly connected to the outside of the threaded sleeve 42. A lifting lead screw 43 is arranged inside the threaded sleeve 42. A jacking block 44 is arranged at the top of the lifting lead screw 43. The operator manually rotates the rotating wheel 45 to drive the threaded sleeve 42 to rotate. The lifting lead screw 43 installed in cooperation with the threaded sleeve 43 rises until it contacts the jacking block 44, so that the jacking block 44 exerts a force on the processing nut 61.

[0021] A through hole is formed at the center position of the jacking block 44 corresponding to the mounting plate 3. The jacking block 44 is slidably arranged in the through hole to ensure that the jacking block 44 can move smoothly in the vertical direction and can provide a detection force for the processing nut 61.

[0022] As Figure 3 shown, the support block 5 is of an I-shaped structure. A V-shaped groove 51 is formed on the top surface of the support block 5. A groove with a rectangular cross-section is formed at the bottom of the V-shaped groove 51 to position the trapezoidal lead screw 6 and prevent front-back shaking during the test from affecting the accuracy.

[0023] The support block 5 is fixed in the positioning groove 31 by bolts and is symmetrically arranged about the central axis of the jacking block 44. The positioning groove 31 provides a limiting function for the support block 5 to ensure that the two support blocks 5 are installed in a straight line, further ensuring the accuracy of the installation position of the trapezoidal lead screw 6. The trapezoidal lead screw 6 and the processing nut 61 are installed on the top of the support block 5.

[0024] A sliding block sleeved on the guide rod 7 is connected to the bottom of the movable plate 8. The dial indicator 10, the machining nut 61 and the jacking block 44 are arranged corresponding to each other in the vertical direction. The operator manually rotates the jacking mechanism 4 to raise the jacking block 44 until it contacts the machining nut 61 installed on the trapezoidal lead screw 6. Since little force is required for the radial detection of the lead screw, the height of the dial indicator 10 is adjusted to the position where it contacts the top surface of the machining nut 61 and the reading is 0. Without the trapezoidal lead screw 6 detaching from the support block 5, the jacking block 44 applies an external force to the machining nut 61 and the radial clearance value is displayed on the dial indicator 10.

[0025] 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", "linkage" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Upper", "lower", "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.

[0026] 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. A radial clearance test tooling for a trapezoidal lead screw and a machined nut, comprising a test tooling body, characterized in that, The test fixture body includes a bottom plate (1) located at the bottommost part. Above the bottom plate (1), a mounting plate (3) is connected by four groups of vertically arranged support profiles (2). A horizontally arranged positioning groove (31) is formed on the surface of the mounting plate (3). Two symmetrically arranged support blocks (5) are installed in the positioning groove (31). A jacking mechanism (4) is arranged between the mounting plate (3) and the bottom plate (1). Guide rods (7) passing through the mounting plate (3) and fixed on the bottom plate (1) are arranged outside the support blocks (5). The two guide rods (7) are vertically installed and fixedly connected at the top by a top plate (9). A movable plate (8) is installed between the top plate (9) and the mounting plate (3). A dial indicator (10) is installed on the movable plate (8).

2. The radial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 1, wherein The jacking mechanism (4) includes a bearing seat (41) fixed to the bottom of the mounting plate (3). A threaded sleeve (42) is arranged below the bearing seat (41). A rotating wheel (45) is fixedly connected to the outside of the threaded sleeve (42). A lifting screw rod (43) is arranged in the threaded sleeve (42). A jacking block (44) is arranged at the top of the lifting screw rod (43).

3. The radial clearance testing tool for a trapezoidal lead screw and a processing nut according to claim 2, characterized in that: The jacking block (44) is provided with a through hole corresponding to the center position of the mounting plate (3), and the jacking block (44) is slidably arranged in the through hole.

4. The radial clearance test tooling for the trapezoidal lead screw and the machining nut according to claim 1, characterized in that, The support block (5) is of an I-shaped structure. A V-shaped groove (51) is formed on the top surface of the support block (5). A groove with a rectangular cross-section is formed at the bottom of the V-shaped groove (51).

5. The radial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 1, characterized in that, The support block (5) is fixed in the positioning groove (31) by bolts and is symmetrically arranged about the central axis of the jacking block (44). A trapezoidal screw rod (6) and a processing nut (61) are installed on the top of the support block (5).

6. The radial clearance testing tooling for the trapezoidal lead screw and the machining nut according to claim 1, characterized in that, The bottom of the movable plate (8) is connected with a sliding block sleeved on the guide rod (7). The dial indicator (10), the processing nut (61), and the jacking block (44) are arranged corresponding to each other in the vertical direction.

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