A middle diameter measuring instrument of a ball screw

Abstract

The utility model relates to ball screw measurement technical field, especially a kind of ball screw's pitch diameter measuring instrument, the one end of installation box length direction is equipped with micrometer, the measuring head of micrometer is inserted into installation box, and the movable member is slidably arranged in installation box, and the movable member includes the guide rail slidably connected with installation box, the first clamping arm fixedly connected at one end of guide rail, adjustment slot is set up on installation box for the first clamping arm to extend and reciprocatingly slip, the outer circumferential surface of installation box is equipped with the second clamping arm with its detachable connection, the first clamping arm and the second clamping arm are oppositely arranged, and the end of both is equipped with contact measuring ball, the first clamping arm is located at the one end of installation box close to micrometer, the second clamping arm is located at the one end away from micrometer, installation box is also equipped with spring to make the first clamping arm after sliding reset, the utility model has the beneficial effects that: improve measurement accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of ball screw measurement, and specifically to a ball screw pitch diameter measuring instrument. Background Technology

[0002] A ball screw is a mechanical transmission device that converts rotary motion into linear motion through the rolling contact of balls between a nut and a screw. When measuring the screw's pitch diameter, the outer diameter of the nut needs to be measured, the wall thickness measured with a micrometer, and the pitch diameter calculated. For workpieces requiring batch inspection, this measurement method is inefficient and has low accuracy, making it unsuitable for production lines. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a ball screw pitch diameter measuring instrument to address the shortcomings of the prior art, thereby improving measurement accuracy and efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a ball screw pitch diameter measuring instrument, comprising a mounting box, a dial indicator mounted at one end of the mounting box along its length, the probe of the dial indicator extending into the mounting box, a movable component slidably disposed within the mounting box, the movable component comprising a guide rail slidably connected to the mounting box, and a first clamping arm fixedly connected to one end of the guide rail, an adjustment groove provided on the mounting box for the first clamping arm to extend and reciprocate, a second clamping arm detachably connected to the outer circumference of the mounting box, the first clamping arm and the second clamping arm being arranged opposite to each other, both having contact balls mounted at their ends, the first clamping arm being located at the end of the mounting box closer to the dial indicator, and the second clamping arm being located at the end away from the dial indicator, and a spring being provided within the mounting box to cause the first clamping arm to return to its original position after sliding.

[0005] The present invention, possessing the above-mentioned features, involves holding the mounting box and pushing the first clamping arm toward the dial indicator until the first and second clamping arms clamp the lead screw. At this point, the end of the guide rail abuts against the probe of the dial indicator and displays a value. This pitch diameter measuring instrument can quickly measure the pitch diameter of the ball screw, improving measurement accuracy and efficiency. Contact measuring balls, located at the ends of the first and second clamping arms, are placed within the groove of the lead screw, increasing the clamping stability of the lead screw by the first and second clamping arms. The contact measuring balls can be replaced according to the size of the lead screw groove. A spring is provided to reset the first clamping arm after sliding. The length of the adjustment groove is limited; when the lead screw to be measured cannot be clamped by the first and second clamping arms, adjusting the second clamping arm allows for the measurement of lead screws of various sizes.

[0006] A further feature of this invention is that two spaced sliders are fixedly installed inside the mounting box, and the guide rail is slidably connected to the two sliders.

[0007] The present invention, which has the above-mentioned features, has the following characteristics: the slider guides the movement of the guide rail, ensuring that the first clamping arm moves in a straight line and keeps it on the same straight line as the second clamping arm, thus ensuring measurement accuracy.

[0008] A further feature of this invention is that a mounting block is fixedly installed at the end of the mounting box away from the dial indicator. One end face of the mounting block is in contact with the end face of the guide rail, and a mounting component is provided through the other end face. The mounting component includes a plug-in shaft section inserted into the end of the guide rail, a mounting shaft section with a spring sleeved on it, and a positioning frustum abutting against the inner wall of the mounting box. The outer diameter of the plug-in shaft section is smaller than the outer diameter of the mounting shaft section. The spring is sleeved on the mounting shaft section, with one end abutting against the positioning frustum and the other end placed inside the mounting block.

[0009] The present invention, which has the above-mentioned features, sets a spring in the mounting box by setting a mounting block and mounting parts, so that it can be stretched as the first clamping arm moves upward, generating an elastic force that causes the first clamping arm to reset.

[0010] A further feature of this invention is that: the outer peripheral surface of the mounting box on which the second clamping arm is mounted is an operating surface; the operating surface has an inwardly recessed groove along its length; the operating surface has two parallel blocking strips, the interval between the two blocking strips being less than the width of the groove; a sliding plate is provided in the groove, the width of the sliding plate being the same as the width of the groove; the end of the second clamping arm is provided with a sliding seat that mates with the groove; the sliding seat includes a seat body that is in contact with the blocking strips and a sliding strip placed within the interval between the blocking strips; the sliding strip is in contact with the sliding plate; and the seat body and the sliding plate are provided with bolt holes for connection to the mounting box.

[0011] The present invention, which has the above-mentioned features, fixes the second clamping arm on the mounting box by setting a sliding groove, a blocking strip and a sliding plate, and allows the distance between the second clamping arm and the first clamping arm to be adjusted according to the actual measured outer diameter of the lead screw, making it suitable for measuring lead screws of different sizes.

[0012] A further feature of this invention is that the end of the first clamping arm connected to the guide rail is provided with an embedding groove for embedding the guide rail. After the guide rail is placed in the embedding groove, its surface is at the same level as the surface of the first clamping arm. The first clamping arm is provided with a fixing block to fix the guide rail in the embedding groove.

[0013] The present invention, which has the above features, achieves a fixed connection between the first clamping arm and the guide rail by setting an embedding groove on the first clamping arm and setting a fixing block cover on the embedding groove, thereby increasing the connection stability between the two.

[0014] A further feature of this invention is that the mounting box is provided with an auxiliary component that abuts against the operator's thumb during measurement. The auxiliary component is installed on the outer peripheral surface adjacent to the first clamping arm. The auxiliary component includes an auxiliary rod inserted into the fixing block and a contact bowl installed at the end of the auxiliary rod, with the concave surface of the contact bowl facing the operator.

[0015] The present invention, which has the above-mentioned features, requires the operator to push the first clamping arm toward the dial indicator during measurement. By setting an auxiliary part to hold the operator's thumb, it helps the operator to apply pushing force to the first clamping arm more conveniently, thereby improving the operating experience of the measuring instrument.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of the mounting box in an embodiment of this utility model.

[0019] Figure 3 This is an exploded view of the internal structure of the mounting box in an embodiment of this utility model.

[0020] Figure 4 This is an exploded view of the installation structure of the second clamping arm in an embodiment of this utility model. Detailed Implementation

[0021] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0022] like Figure 1-4The ball screw pitch diameter measuring instrument shown includes a mounting box 1. A dial indicator 2 is mounted on one end of the mounting box 1 along its length. The probe 21 of the dial indicator 2 extends into the mounting box 1. A movable component is slidably provided inside the mounting box 1. The movable component includes a guide rail 3 slidably connected to the mounting box 1 and a first clamping arm 4 fixedly connected to one end of the guide rail 3. An adjustment groove 16 is provided on the mounting box 1 for the first clamping arm 4 to extend and slide back and forth. Two spaced sliders 8 are fixedly mounted inside the mounting box 1. The guide rail 3 is slidably connected to the two sliders 8. A second clamping arm 5 is provided on the outer circumference of the mounting box 1 and is detachably connected to it. The first clamping arm 4 and the second clamping arm 5 are arranged opposite to each other, and both ends are equipped with contact measuring balls 6. Arm 4 is located at the end of mounting box 1 near dial indicator 2, and second clamping arm 5 is located at the end away from dial indicator 2. Mounting box 1 is also provided with spring 7 to cause the first clamping arm 4 to return to its original position after sliding. Mounting block 9 is fixedly installed at the end of mounting box 1 away from dial indicator 2. One end face of mounting block 9 is in contact with the end face of guide rail 3, and the other end face is provided with mounting component 10. Mounting component 10 includes plug-in shaft section 101 inserted into the end of guide rail 3, mounting shaft section 102 on which spring 7 is sleeved, and positioning frustum 103 abutting against the inner wall of mounting box 1. The outer diameter of plug-in shaft section 101 is smaller than the outer diameter of mounting shaft section 102. Spring 7 is sleeved on mounting shaft section 102, one end of which abuts against positioning frustum 103, and the other end is placed in mounting block 9.

[0023] The outer peripheral surface of the mounting box 1 for mounting the second clamping arm 5 is the operating surface. The operating surface has an inwardly recessed groove 11 along its length. One end of the groove 11 is connected to the adjustment groove 16. The operating surface has two parallel blocking strips 12. The gap between the two blocking strips 12 is smaller than the width of the groove 11. A sliding plate 13 is provided in the groove 11. The width of the sliding plate 13 is the same as the width of the groove 11. The end of the second clamping arm 5 is provided with a sliding seat 51 that cooperates with the groove 11. The sliding seat 51 includes a seat body 511 that is in contact with the blocking strips 12 and a sliding strip 512 placed in the gap between the blocking strips 12. The sliding strip 512 is in contact with the sliding plate 13. Both the seat body 511 and the sliding plate 13 are provided with bolt holes 5111 for connecting to the mounting box 1.

[0024] The end of the first clamping arm 4 connected to the guide rail 3 is provided with an insertion groove 41 for the guide rail 3 to be inserted. After the guide rail 3 is placed in the insertion groove 41, its surface is at the same level as the surface of the first clamping arm 4. The first clamping arm 4 is provided with a fixing block 14 to fix the guide rail 3 in the insertion groove 41.

[0025] The mounting box 1 is provided with an auxiliary component 15 that rests against the operator's thumb during measurement. The auxiliary component 15 is installed on the outer peripheral surface adjacent to the first clamping arm 4. The auxiliary component 15 includes an auxiliary rod 151 inserted into the fixing block 14 and a contact bowl 152 installed at the end of the auxiliary rod 151. The concave surface of the contact bowl 152 faces the operator.

[0026] When the operator uses the ball screw pitch diameter measuring instrument, calibration is required first. Push the first clamping arm upward until the calibration block can be placed between the first and second clamping arms, and the contact ball is locked in the groove of the screw. The first clamping arm clamps the calibration block under the action of the spring, and the guide rail abuts against the probe of the dial indicator. At this time, the value displayed on the dial indicator is cleared to zero as the standard value. After calibration is completed, push the first clamping arm to remove the calibration block.

[0027] Push the first clamping arm again until the lead screw can be inserted between the first and second clamping arms, and the contact ball is locked in the groove of the lead screw. The first clamping arm clamps the calibration block under the action of the spring, and the guide rail abuts against the probe of the dial indicator. At this time, the reading of the dial indicator is the mean diameter of the lead screw. If the groove of the lead screw to be measured does not match the current contact ball, replace the contact ball. If the first clamping arm cannot clamp the lead screw after sliding the first clamping arm back and forth in the adjustment groove, adjust the position of the second clamping arm in the groove.

Claims

1. A ball screw pitch diameter measuring instrument, characterized in that: The device includes a mounting box, with a dial indicator mounted at one end along its length. The probe of the dial indicator extends into the mounting box. A movable component is slidably disposed within the mounting box. The movable component includes a guide rail slidably connected to the mounting box and a first clamping arm fixedly connected to one end of the guide rail. An adjustment groove is provided on the mounting box for the first clamping arm to extend and slide back and forth. A second clamping arm is detachably connected to the outer circumference of the mounting box. The first clamping arm and the second clamping arm are arranged opposite to each other, and both ends are equipped with contact probes. The first clamping arm is located at the end of the mounting box closer to the dial indicator, and the second clamping arm is located at the end farther away from the dial indicator. A spring is also provided inside the mounting box to cause the first clamping arm to return to its original position after sliding.

2. The ball screw pitch diameter measuring instrument according to claim 1, characterized in that: Two spaced sliders are fixedly installed inside the mounting box, and the guide rail is slidably connected to the two sliders.

3. The ball screw pitch diameter measuring instrument according to claim 1, characterized in that: A mounting block is fixedly installed at the end of the mounting box away from the dial indicator. One end face of the mounting block is in contact with the end face of the guide rail, and a mounting component is inserted through the other end face. The mounting component includes a plug-in shaft section inserted into the end of the guide rail, a mounting shaft section with a spring sleeved on it, and a positioning frustum abutting against the inner wall of the mounting box. The outer diameter of the plug-in shaft section is smaller than the outer diameter of the mounting shaft section. The spring is sleeved on the mounting shaft section, with one end abutting against the positioning frustum and the other end placed inside the mounting block.

4. A ball screw pitch diameter measuring instrument according to claim 1 or 2, characterized in that: The outer peripheral surface of the mounting box for mounting the second clamping arm is the operating surface. The operating surface has an inwardly recessed groove along its length. The operating surface has two parallel blocking strips, the interval between the two blocking strips being less than the width of the groove. A sliding plate is provided in the groove, the width of the sliding plate being the same as the width of the groove. The end of the second clamping arm is provided with a sliding seat that mates with the groove. The sliding seat includes a seat body that is in contact with the blocking strips and a sliding strip placed within the interval between the blocking strips. The sliding strip is in contact with the sliding plate. The seat body and the sliding plate are provided with bolt holes for connection to the mounting box.

5. The ball screw pitch diameter measuring instrument according to claim 4, characterized in that: The end of the first clamping arm connected to the guide rail is provided with a mounting groove for the guide rail to be embedded. After the guide rail is placed in the mounting groove, its surface is at the same level as the surface of the first clamping arm. The first clamping arm is provided with a fixing block to fix the guide rail in the mounting groove.

6. The ball screw pitch diameter measuring instrument according to claim 5, characterized in that: The mounting box is equipped with an auxiliary component that rests against the operator's thumb during measurement. The auxiliary component is installed on the outer peripheral surface adjacent to the first clamping arm. The auxiliary component includes an auxiliary rod inserted into the fixing block and an abutment cup installed at the end of the auxiliary rod, with the concave surface of the abutment cup facing the operator.

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