Contact type keyway symmetry degree measuring device

Abstract

The utility model belongs to the field of key groove symmetry degree measurement, and particularly relates to a contact type key groove symmetry degree measuring device which comprises a handle frame, a fixed gauge stand is fixedly connected to one side of the handle frame, a dial indicator is arranged in the fixed gauge stand, a V-shaped self-centering groove is formed in one side of the handle frame, and the V-shaped self-centering groove is connected with the fixed gauge stand. The measuring end of the dial indicator extends into the V-shaped self-centering groove, and a lead screw is arranged in the V-shaped self-centering groove. According to the utility model, the V-shaped self-centering groove is aligned with the screw rod for centering, zero setting is carried out between the dial indicator and the outer circle of the threaded rod at the moment, the dial indicator is clamped into a key groove of the screw rod through the fixing assembly, the handle frame is held at the moment, movement is carried out along the axis of the screw rod, numerical values on the dial indicator and the turning degree of the screw rod are checked, and numerical values measured by the same method are compared. The obtained difference value is the symmetry error, two key groove value correction operations are reduced, the screw rod key groove symmetry value can be rapidly and accurately measured, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of keyway symmetry measurement, specifically a contact-type keyway symmetry measurement device. Background Technology

[0002] Lead screws are cylindrical or conical with helical grooves cut on their outer surface. Lead screws come in different styles, and many lead screws have keyways on their exterior for use in special applications. Therefore, the keyways are measured during production.

[0003] In keyway measurement, two V-blocks are typically used to support the workpiece. A dial indicator is used to calibrate one side of the keyway. The distance from the top of the outer circle of the lead screw to the lower side of the keyway is measured and recorded. Then, the lead screw is rotated 180 degrees, and the lower side of the keyway is calibrated again. The distance between the top of the outer circle of the lead screw and the measured lower side is then measured. The error obtained by comparing the two measurements is the keyway symmetry error. However, this process is cumbersome and time-consuming, affecting normal production line operations. Therefore, a contact-type keyway symmetry measurement device is proposed to address the above problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the problem of the common practice in keyway measurement, which involves using two V-shaped supports to support the workpiece, calibrating one side of the keyway with a dial indicator, measuring the distance from the top of the outer circle of the lead screw to the lower side of the keyway, recording the measured value, then rotating the lead screw 180 degrees to calibrate the lower side of the keyway again, and measuring the distance between the top of the outer circle of the lead screw and the measured lower side. The error obtained by comparing the two dimensions is the keyway symmetry error. However, this process is cumbersome, time-consuming, and affects the normal production line. This invention proposes a contact-type keyway symmetry measuring device.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The contact keyway symmetry measuring device of this utility model includes a handle frame, a fixed dial indicator is fixedly connected to one side of the handle frame, a dial indicator is provided inside the fixed dial indicator, a V-shaped self-centering groove is provided on one side of the handle frame, the measuring end of the dial indicator extends into the interior of the V-shaped self-centering groove, a lead screw is provided inside the V-shaped self-centering groove, and a fixing component is provided on one side of the handle frame.

[0006] Preferably, the fixing component includes a through hole, a threaded slider, a directional block, and a threaded rod. The through hole is opened inside the handle holder, the threaded slider is slidably connected inside the through hole, the directional block is fixedly connected to one side of the threaded slider, and the threaded rod is rotatably connected inside the through hole and threadedly connected inside the threaded slider.

[0007] Preferably, an equal-height sleeve is provided inside the through hole, and the equal-height sleeve is located outside the threaded rod.

[0008] Preferably, a fixing cover is fixedly connected to one side of the handle holder.

[0009] Preferably, a gasket is provided on one side of the fixing cover, and the threaded rod is in contact with the gasket.

[0010] The advantages of this utility model are:

[0011] 1. This utility model aligns the V-shaped self-centering groove with the lead screw for centering. At this time, the dial indicator is zeroed between the dial indicator and the outer circle of the threaded rod. The fixing component is then inserted into the keyway of the lead screw. Holding the handle frame, the model moves along the axis of the lead screw and observes the value on the dial indicator and the degree of lead screw rotation. The values ​​obtained by measuring again in the same way are compared. The difference is the symmetry error. This reduces the keyway calibration operation by two steps and can quickly and accurately measure the symmetry value of the lead screw keyway, thus improving the efficiency of inspection.

[0012] 2. This utility model achieves this by rotating the threaded rod, which, through the threaded engagement between the threaded rod and the threaded slider, prevents the threaded slider from rotating. Meanwhile, the threaded rod, rotating on one side of the through hole, cannot move axially. At this point, the threaded slider can move, which causes the directional block to engage with the keyway of the lead screw. This limits the lead screw and secures the device on the lead screw, maintaining it in a zero-adjustment state. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an enlarged structural diagram of part A of this utility model.

[0016] In the diagram: 1. Handle holder; 2. Fixed base; 3. Dial indicator; 4. V-shaped self-centering groove; 5. Lead screw; 6. Fixed assembly; 601. Through hole; 602. Threaded slider; 603. Orientation block; 604. Threaded rod; 7. Equal height sleeve; 8. Gasket; 9. Fixed cover. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0018] Please see Figures 1-2 As shown, a contact-type keyway symmetry measuring device includes a handle frame 1, a fixed gauge base 2 is fixedly connected to one side of the handle frame 1, a dial indicator 3 is provided inside the fixed gauge base 2, a V-shaped self-centering groove 4 is provided on one side of the handle frame 1, the measuring end of the dial indicator 3 extends into the interior of the V-shaped self-centering groove 4, a lead screw 5 is provided inside the V-shaped self-centering groove 4, and a fixing component 6 is provided on one side of the handle frame 1.

[0019] During operation, the V-shaped self-centering groove 4 is aligned with the lead screw 5 for centering. Then, the fixing component 6 is inserted into the lead screw 5 for limiting. At this time, the handle frame 1 is held and moved along the axis of the lead screw 5. The value on the dial indicator 3 is checked. The lead screw 5 is rotated 180 degrees, and the value obtained is measured again in the same way. The difference is the symmetry error. This reduces the keyway calibration operation by two times and can quickly and accurately measure the symmetry value of the keyway of the lead screw 5, thus improving the efficiency of inspection.

[0020] Furthermore, the fixing component 6 includes a through hole 601, a threaded slider 602, a directional block 603, and a threaded rod 604. The through hole 601 is opened inside the handle holder 1. The threaded slider 602 is slidably connected inside the through hole 601. The directional block 603 is fixedly connected to one side of the threaded slider 602. The threaded rod 604 is rotatably connected inside the through hole 601 and threadedly connected to the inside of the threaded slider 602.

[0021] During operation, rotating the threaded rod 604 causes a threaded engagement between the threaded rod 604 and the threaded slider 602. The threaded slider 602 cannot rotate, while the threaded rod 604 cannot move axially on one side of the through hole 601. At this time, the threaded slider 602 can move, which will cause the directional block 603 to engage in the keyway of the lead screw 5, thus fixing the position of the lead screw 5.

[0022] Furthermore, an equal-height sleeve 7 is provided inside the through hole 601, and the equal-height sleeve 7 is located outside the threaded rod 604;

[0023] During operation, the level of the threaded rod 604 is kept constant by using the set level sleeve 7, so that the fixed screw 5 is also level.

[0024] Furthermore, a fixing cover 9 is fixedly connected to one side of the handle holder 1;

[0025] During operation, the fixed cover 9 can be opened, which makes it easy to replace the internal components of the through hole 601.

[0026] Furthermore, a gasket 8 is provided on one side of the fixed cover 9, and the threaded rod 604 contacts the gasket 8;

[0027] During operation, the shims 8 reduce wear, protect the device, and increase its service life.

[0028] Working principle: In use, align the V-shaped self-centering groove 4 with the lead screw 5 for centering. At this time, zero the dial indicator 3 with the outer circle of the threaded rod 604. Then rotate the threaded rod 604. Through the threaded engagement between the threaded rod 604 and the threaded slider 602, and the threaded slider 602 cannot rotate, while the threaded rod 604 cannot move axially on one side of the through hole 601, the threaded slider 602 can move. This will drive the directional block 603 to engage inside the keyway of the lead screw 5. At this time, hold the handle bracket 1 and move it along the axis of the lead screw 5. Check the value on the dial indicator 3. Rotate the lead screw 5 180 degrees and measure the value again in the same way. Compare the obtained values. The difference is the symmetry error. This reduces the keyway calibration operation by two times and can quickly and accurately measure the symmetry value of the lead screw 5 keyway, improving the efficiency of inspection.

[0029] 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 illustrative of the 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.

Claims

1. A contact-type keyway symmetry measuring device, comprising a handle holder (1), characterized in that: A fixed base (2) is fixedly connected to one side of the handle frame (1). A dial indicator (3) is provided inside the fixed base (2). A V-shaped self-centering groove (4) is provided on one side of the handle frame (1). The measuring end of the dial indicator (3) extends into the interior of the V-shaped self-centering groove (4). A lead screw (5) is provided inside the V-shaped self-centering groove (4). A fixing component (6) is provided on one side of the handle frame (1).

2. The contact-type keyway symmetry measuring device according to claim 1, characterized in that: The fixing component (6) includes a through hole (601), a threaded slider (602), a guide block (603), and a threaded rod (604). The through hole (601) is opened inside the handle holder (1). The threaded slider (602) is slidably connected inside the through hole (601). The guide block (603) is fixedly connected to one side of the threaded slider (602). The threaded rod (604) is rotatably connected inside the through hole (601) and is threadedly connected inside the threaded slider (602).

3. The contact-type keyway symmetry measuring device according to claim 2, characterized in that: An equal-height sleeve (7) is provided inside the through hole (601), and the equal-height sleeve (7) is located outside the threaded rod (604).

4. The contact-type keyway symmetry measuring device according to claim 2, characterized in that: A fixing cover (9) is fixedly connected to one side of the handle holder (1).

5. The contact-type keyway symmetry measuring device according to claim 4, characterized in that: A gasket (8) is provided on one side of the fixed cover (9), and the threaded rod (604) is in contact with the gasket (8).

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