A screw lead instrument measuring head mechanism and measuring method

Abstract

The present invention relates to a screw lead gauge measuring head mechanism and a measuring method, the mechanism comprises a cylindrical measuring rod, a measuring rod seat, an angle measuring shaft, a shaft locking unit, an angle adjustment unit, an upper slide, a lower slide, a slide moving unit, an angle measuring feedback unit, and a damping unit, wherein the upper slide is installed on the lower slide via the slide moving unit, the angle measuring shaft is installed in the upper slide, a shaft locking unit is provided between the angle measuring shaft and the upper slide, the front end of the angle measuring shaft is connected to the cylindrical measuring rod via the measuring rod seat, the rear end is connected to the angle adjusting unit, and the rear end is connected to the angle measuring feedback unit after passing through the upper slide; the lower slide is installed on a bottom plate, and a damping unit is provided at the front end of the bottom plate. The present invention has the characteristics of reliable measurement contact and high transmission rigidity, and the volume of the mechanism is significantly reduced, the difficulty of manufacturing and matching is low, and it can solve the defects of the traditional measuring head of the screw lead gauge, and provides an effective solution for such instruments.

Description

Technical Field

[0001] The invention relates to a screw lead measuring instrument, in particular to a screw lead measuring instrument measuring head mechanism and a measuring method. Background Art

[0002] At present, a screw lead gauge with a minimum measurement of 0.3mm pitch needs its measuring head to be embedded in the thread groove and fit reliably with the side of the thread. The mechanism needs to be able to transmit a certain lateral load. This type of screw lead gauge has high performance requirements for the measuring head mechanism. The current method generally can only use traditional ruby ​​probes. When measuring small pitches, the ball diameter of the jewel head needs to be less than 0.15mm, which is difficult and costly to manufacture. Small-diameter probes have poor rigidity and extremely poor lateral load transmission capacity, which can easily cause measurement errors. In view of the above situation, an effective solution needs to be provided. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the problems existing in the prior art and provide a screw lead gauge measuring head mechanism and a measuring method, which are mainly used for the screw lead gauge to ensure its reliable, high-rigidity and high-precision operation.

[0004] In order to solve the above problems, the technical solution of the present invention is as follows:

[0005] A screw lead instrument measuring head mechanism comprises a cylindrical measuring rod, a measuring rod seat, an angle measuring shaft, a shaft locking unit, an angle adjustment unit, an upper slide, a lower slide, a slide moving unit, an angle measuring feedback unit, and a damping unit. The upper slide is installed on the lower slide through the slide moving unit, the angle measuring shaft is installed in the upper slide, a shaft locking unit is provided between the angle measuring shaft and the upper slide, the front end of the angle measuring shaft is connected to the cylindrical measuring rod through the measuring rod seat, the rear end is connected to the angle adjustment unit, and the rear end passes through the upper slide and is connected to the angle measuring feedback unit; the lower slide is installed on a base plate, and a damping unit is provided at the front end of the base plate.

[0006] Furthermore, the cylindrical measuring rod is connected to the measuring rod seat by bonding.

[0007] Furthermore, the measuring rod seat includes measuring rod seats of various diameters, which can be fixed to the end faces of the angle measuring shafts respectively.

[0008] Furthermore, the rotation of the angle measuring shaft is rotationally adjusted by the angle adjustment unit, and the rotation parameters according to the thread helix angle are controlled and displayed by the angle measuring feedback unit, and are reliably locked by the shaft locking unit.

[0009] Furthermore, the upper slide is driven to move on the lower slide by the slide moving unit, and is used to connect or disconnect the damping unit to control the smooth movement of the measuring head.

[0010] Furthermore, during measurement, the cylindrical measuring rod is embedded in the thread groove and contacts the single-sided tooth surface.

[0011] A measuring method using a screw lead gauge measuring head mechanism specifically comprises the following steps:

[0012] The first step is to select the corresponding cylindrical measuring rod and measuring rod seat according to the thread pitch, and fix them on the angle measuring axis;

[0013] The second step is to adjust the angle measuring axis and the measuring rod seat to the corresponding angle through the angle adjustment unit and the angle measuring feedback unit according to the thread helix angle, and then lock them;

[0014] The third step is to adjust the lower slide to the corresponding position according to the different thread diameters, and leave space for the upper slide to move and adjust;

[0015] The fourth step is to drive and adjust the upper slide seat through the mobile unit to control the cylindrical measuring rod to be embedded in the thread groove, and ensure that there is an axial clearance between the cylindrical measuring rod and the thread groove, so as to ensure that the cylindrical measuring rod cannot contact the side surface of the thread groove at the same time;

[0016] Step 5: Connect the measuring head motion damping unit;

[0017] Step 6. After the measurement is completed, the upper slide is controlled to move outward, the cylindrical measuring rod withdraws from the thread groove, and the measuring head mechanism of the lead screw gauge can move freely axially.

[0018] The beneficial effects of the present invention are as follows: the present invention achieves the following objectives by adopting the above mechanism and measuring method:

[0019] 1) The cylindrical measuring rod is a standard accessory with various diameter specifications, the smallest diameter can be 0.1mm, and it can adapt to different pitch threads. It is easy to purchase, with short matching time and low cost.

[0020] 2) After the cylindrical measuring rod is worn out, it is fixed by bonding, which makes replacement quick and easy.

[0021] 3) The cylindrical measuring rod is installed as a whole on the measuring seat. It has high rigidity and large lateral load-bearing capacity, and can stably transmit the measuring force.

[0022] 4) Through angle measurement adjustment, the cylindrical measuring rod surface is in tangential contact with the thread teeth, the contact is reliable and the measurement accuracy is high.

[0023] 5) A damping unit is used to control the overall movement of the measuring head mechanism to be smooth.

[0024] Therefore, the present invention can solve the defects of the traditional measuring head of the screw lead gauge and provide an effective solution for such instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a diagram showing the structure of the measuring head of the lead screw gauge of the present invention;

[0026] Figure 2 It is a schematic diagram of the cylindrical measuring rod head of the lead screw lead gauge measuring head of the present invention. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0028] like Figure 1 As shown, a screw lead gauge measuring head mechanism of the present embodiment includes a cylindrical measuring rod 1, a measuring rod seat 2, an angle measuring shaft 3, a shaft locking unit 4, an angle adjustment unit 5, an upper slide 6, an angle measuring feedback unit 7, a slide moving unit 8, a lower slide seat 9, a base plate 10, and a damping unit 11.

[0029] The upper slide 6 is installed on the lower slide 9 through the slide moving unit 8. The upper slide 6 is installed with an angle measuring shaft 3, and an axis locking unit 4 is provided between the angle measuring shaft 3 and the upper slide 6. The front end of the angle measuring shaft 3 is connected to the cylindrical measuring rod 1 through the measuring rod seat 2, and the rear end is connected to the angle adjustment unit 5. The rear end passes through the upper slide 6 and is connected to the angle measurement feedback unit 7. The lower slide 9 is installed on the bottom plate 10, and a damping unit 11 is provided at the front end of the bottom plate 10.

[0030] The cylindrical measuring rod 1 is connected to the measuring rod seat 2 by bonding. The measuring rod seat 2 includes measuring rod seats of various diameters, which can be fixed to the end faces of the angle measuring shaft 3 respectively; the angle measuring shaft 3 can rotate, and its angle is controlled and displayed by the angle adjustment unit 5 and the angle measuring feedback unit 7. The rotation parameter is based on the thread helix angle and is reliably locked by the shaft locking unit 4; the upper slide 6 is driven by the moving unit 8 and can move on the lower slide 9; by connecting and disconnecting the damping unit 11, the stable movement of the measuring head is controlled.

[0031] like Figure 2 As shown, the cylindrical measuring rod head structure: the cylindrical measuring rod 1 is connected to the measuring rod seat 2, the cylindrical measuring rod is embedded in the thread groove, and contacts with the single-sided tooth surface during measurement.

[0032] A measuring method using a screw lead gauge measuring head mechanism comprises the following steps:

[0033] First, select the corresponding cylindrical measuring rod 1 and measuring rod seat 2 according to the thread pitch, and fix them on the front end surface of the angle measuring shaft 3.

[0034] Second, according to the thread helix angle, the angle measuring shaft 3 and the measuring rod seat 2 are adjusted to corresponding angles through the angle adjustment unit 5 and the angle measuring feedback unit 7, and are reliably locked through the shaft locking unit 4.

[0035] Third, according to different thread diameters, adjust the lower slide seat 9 to the corresponding position and leave a movement margin for the upper slide seat 6.

[0036] Fourthly, the upper slide 6 is driven and adjusted by the moving unit 8 to control the cylindrical measuring rod 1 to be embedded in the thread groove. An axial clearance must be left between the cylindrical measuring rod 1 and the thread groove to ensure that the cylindrical measuring rod 1 cannot contact the side surface of the thread tooth at the same time.

[0037] Fifth, connect the measuring head motion damping unit 11.

[0038] Sixth, after the measurement is finished, the upper slide 6 is controlled to move outward, the measuring head 1 withdraws from the thread teeth, and the measuring head mechanism of the lead screw gauge can move axially freely.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A measurement method using a lead screw gauge measuring head mechanism, the lead screw gauge measuring head mechanism comprising a cylindrical measuring rod, a measuring rod seat, an angle measuring shaft, a shaft locking unit, an angle adjustment unit, an upper slide, a lower slide, a slide moving unit, an angle measuring feedback unit, and a damping unit, wherein the upper slide is mounted on the lower slide via the slide moving unit, the angle measuring shaft is mounted in the upper slide, a shaft locking unit is provided between the angle measuring shaft and the upper slide, the front end of the angle measuring shaft is connected to the cylindrical measuring rod via the measuring rod seat, the rear end is connected to the angle adjustment unit, and the rear end passes through the upper slide and is connected to the angle measuring feedback unit; the lower slide is mounted on a bottom plate, and a damping unit is provided at the front end of the bottom plate, characterized in that This measurement method specifically The following steps are involved: The first step is to select the corresponding cylindrical measuring rod and measuring rod seat according to the thread pitch, and fix them on the angle measuring axis; The second step is to adjust the angle measuring axis and the measuring rod seat to the corresponding angle through the angle adjustment unit and the angle measuring feedback unit according to the thread helix angle, and then lock them; The third step is to adjust the lower slide to the corresponding position according to the different thread diameters, and leave space for the upper slide to move and adjust; The fourth step is to drive and adjust the upper slide seat through the mobile unit to control the cylindrical measuring rod to be embedded in the thread groove, and ensure that there is an axial clearance between the cylindrical measuring rod and the thread groove, so as to ensure that the cylindrical measuring rod cannot contact the side surface of the thread groove at the same time; Step 5: Connect the measuring head motion damping unit; Step 6. After the measurement is completed, the upper slide is controlled to move outward, the cylindrical measuring rod withdraws from the thread groove, and the measuring head mechanism of the lead screw gauge can move freely axially.

2. The measuring method using the screw lead gauge measuring head mechanism according to claim 1, characterized in that: The cylindrical measuring rod is connected to the measuring rod seat by bonding.

3. The measuring method using the screw lead gauge measuring head mechanism according to claim 1, characterized in that: The measuring rod seat includes measuring rod seats of various diameters, which can be fixed to the end faces of the angle measuring shafts respectively.

4. The measuring method using the screw lead gauge measuring head mechanism according to claim 1, characterized in that: The rotation angle of the angle measuring shaft is rotationally adjusted by the angle adjustment unit, and the rotation parameters according to the thread helix angle are controlled and displayed by the angle measuring feedback unit, and are reliably locked by the shaft locking unit.

5. The measuring method using the screw lead gauge measuring head mechanism according to claim 1, characterized in that: The upper slide is driven to move on the lower slide by the slide moving unit; it is used to connect or disconnect the damping unit to control the smooth movement of the measuring head.

6. The measuring method using the screw lead gauge measuring head mechanism according to claim 1, characterized in that: During measurement, the cylindrical measuring rod is embedded in the thread groove and contacts the single-sided tooth surface.

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