A testing fixture for a screw thread raceway

Abstract

The utility model relates to lead screw testing fixture technical field, especially a kind of lead screw thread raceway testing fixture, a kind of lead screw thread raceway testing fixture, including the machine table of L font shape, the scale mark is set in the machine table front wall place.This utility model fixed hole at nut is connected with screw, form connection, alternatively, the convex outer edge of nut is embedded in the recessed groove of guide seat, is connected, at this time, nut displacement, extrude guide seat displacement, drive the pointer displacement of fixed frame end wall, observe the relative position of pointer and scale mark, read the displacement parameter of pointer, lead screw drives a fixed time, such as five seconds, record displacement parameter, reciprocating above-mentioned operation again, record displacement parameter, after the multiple parameters of reading are compared, observe whether the displacement of lead screw is same, lead screw raceway spacing is same, displacement distance is same, otherwise, displacement distance is different, it is convenient to obtain lead screw raceway condition, reach the purpose of detecting lead screw thread raceway.

Description

Technical Field

[0001] This utility model relates to the field of lead screw inspection tools, and in particular to a lead screw thread raceway inspection tool. Background Technology

[0002] Lead screws are ideal products for converting rotary motion into linear motion, or vice versa. When inspecting the thread raceway of a lead screw, a gauge is used to check the condition of the thread raceway.

[0003] When inspecting lead screws, a common measuring tool structure is used to measure the thread raceway. However, because the raceway of the lead screw is relatively long, a simple measuring tool is difficult to measure comprehensively and quickly, resulting in poor measurement efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a screw thread raceway inspection tool.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lead screw thread raceway inspection fixture includes an L-shaped machine base with scale markings on the front wall of the machine base, a motor fixed to the top end wall of the machine base, a three-jaw clamp connected to the right end of the motor, the end of the three-jaw clamp holding the lead screw, a nut threadedly connected to the end of the lead screw, and an indicator structure adapted to the scale markings connected to the end of the nut.

[0007] Preferably, the bottom of the machine tool has a through slot, and the bottom wall of the machine tool near the slot has an indentation.

[0008] Preferably, the left end wall of the machine tool has a through opening, and the left wall of the machine tool adjacent to the through opening has an insertion port.

[0009] Preferably, the indicating structure includes a slide bar fixed to the side wall of the machine base and a fixed frame movably connected to the end of the slide bar.

[0010] Preferably, the indicating structure further includes a pointer fixed to the bottom wall of the bracket, a guide fixed to the top wall of the bracket, and a screw threaded to the center of the guide.

[0011] Preferably, the nut end wall has fixed holes arranged in a ring shape for threaded connection with the screw.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. Place the nut of the lead screw to be tested into the slot, store the nut through the inner recess, insert the lead screw into the socket at the machine, and temporarily store it after insertion.

[0014] 2. The motor runs, driving the three-jaw chuck to rotate, which in turn drives the lead screw to rotate. The screw end is threaded with a nut, which drives the nut to transmit displacement. The three-jaw chuck is used to engage with the end of the lead screw.

[0015] 3. The fixed hole at the nut is connected to the screw to form a connection, or the outer edge of the protrusion at the nut is embedded into the groove of the guide seat to form a connection. At this time, the nut is displaced, which squeezes the guide seat to move, causing the pointer at the end wall of the bracket to move. Observe the relative position of the pointer and the scale mark, and read the pointer displacement parameter. Drive the lead screw for a fixed time, such as five seconds, and record the displacement parameter. Repeat the above operation and record the displacement parameter. Then compare the multiple sets of parameters read to observe whether the lead screw displacement is the same, the lead screw raceway spacing is the same, and the displacement distance is the same. Otherwise, the displacement distance is different. This makes it easy to obtain the condition of the lead screw raceway and achieve the purpose of detecting the lead screw thread raceway. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 A top view of the concave opening;

[0019] Figure 3 for Figure 1 A top view of the socket;

[0020] Figure 4 for Figure 1 Enlarged diagram of point A.

[0021] In the diagram: 1. Machine base; 2. Groove; 3. Scale markings; 4. Through-hole; 5. Insertion port; 6. Motor; 7. Three-jaw clamp; 8. Lead screw; 9. Nut; 10. Fixed hole; 11. Fixture; 12. Pointer; 13. Guide seat; 14. Screw; 15. Inner recess; 16. Slide bar. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] Please see Figure 1-4This utility model provides a technical solution for a lead screw thread raceway inspection tool:

[0024] like Figure 1-4 As shown, a screw thread raceway inspection tool includes an L-shaped machine base 1. The front wall of the machine base 1 is provided with a scale mark 3. A motor 6 is fixed to the top end wall of the machine base 1. A three-jaw clamp 7 is connected to the right end of the motor 6. The end of the three-jaw clamp 7 holds a screw 8. A nut 9 is threadedly connected to the end of the screw 8. An indicator structure adapted to the scale mark 3 is connected to the end of the nut 9.

[0025] The bottom of the machine 1 has a slot 2, and the bottom wall of the machine 1 near the slot 2 has an indentation 15. The left side wall of the machine 1 has a through hole 4, and the left side wall of the machine 1 near the through hole 4 has an insertion hole 5.

[0026] The indicating structure includes a slide bar 16 fixed to the side wall of the machine base 1, a fixed frame 11 movably connected to the end of the slide bar 16, and a pointer 12 fixed to the bottom wall of the fixed frame 11, a guide seat 13 fixed to the top wall of the fixed frame 11, and a screw 14 threaded to the center of the guide seat 13.

[0027] The nut 9 has a ring of fixed holes 10 that are threaded to the screw 14.

[0028] Working principle:

[0029] The nut of the lead screw to be tested is placed in slot 2. The nut is stored through the inner recess 15. The lead screw is inserted into the insertion port 5 at machine 1 and then temporarily stored after being inserted into the through port 4.

[0030] When the motor 6 runs, it drives the three-jaw clamp 7 to rotate, which in turn drives the lead screw 8 to rotate. The end wall of the lead screw 8 is threaded with a nut 9, which drives the nut 9 to transmit displacement. The three-jaw clamp 7 is used to clamp and connect with the end of the lead screw 8.

[0031] The fixed hole 10 at nut 9 is connected to screw 14 to form a connection, or the outer edge of the protrusion at nut 9 is embedded in the groove of guide seat 13 to form a connection. At this time, nut 9 is displaced, which squeezes guide seat 13 to displace, and drives pointer 12 at the end wall of bracket 11 to displace. Observe the relative position of pointer 12 and scale mark 3, and read the displacement parameter of pointer 12. The lead screw 8 is driven for a fixed time, such as five seconds, and the displacement parameter is recorded. Repeat the above operation and record the displacement parameter. Then compare the multiple sets of parameters read to observe whether the lead screw displacement is the same, the raceway spacing of lead screw 8 is the same, and the displacement distance is the same. Otherwise, the displacement distance is different. This makes it convenient to obtain the raceway condition of lead screw 8 and achieve the purpose of detecting the raceway of lead screw thread.

[0032] When the frame 11 is displaced, it moves with the slide bar 16 to stabilize the transmission displacement frame 11.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A screw thread raceway inspection fixture, comprising an L-shaped machine base (1), characterized in that, The machine base (1) has a scale mark (3) on its front wall. A motor (6) is fixed to the top end wall of the machine base (1). A three-jaw clamp (7) is connected to the right end of the motor (6). A lead screw (8) is held at the end of the three-jaw clamp (7). A nut (9) is threaded to the end of the lead screw (8). An indicator structure that matches the scale mark (3) is connected to the end of the nut (9).

2. The screw thread raceway inspection fixture according to claim 1, characterized in that, The bottom of the machine base (1) has a through slot (2), and the bottom wall of the machine base (1) near the slot (2) has an indentation (15).

3. A screw thread raceway inspection fixture according to claim 2, characterized in that, The machine tool (1) has a through-hole (4) on the left end wall, and an insertion hole (5) is provided on the left wall of the machine tool (1) near the through-hole (4).

4. A screw thread raceway inspection fixture according to claim 1, characterized in that, The indicating structure includes a slide bar (16) fixed to the side wall of the machine base (1) and a fixed frame (11) movably connected to the end of the slide bar (16).

5. A screw thread raceway inspection fixture according to claim 4, characterized in that, The indicating structure also includes a pointer (12) fixed to the bottom wall of the bracket (11), a guide seat (13) fixed to the top wall of the bracket (11), and a screw (14) threaded to the center of the guide seat (13).

6. A screw thread raceway inspection fixture according to claim 5, characterized in that, The nut (9) has a ring-shaped set hole (10) that is threaded to the screw (14).

Images