Symmetry error measuring device for keyway on shaft part

Abstract

The utility model discloses a symmetry error measuring device for a key groove on a shaft part, a base is provided with a first V-shaped groove with a vertically upward notch, two vertical rods are arranged at two sides of the first V-shaped groove and can horizontally slide on the base, each vertical rod is connected with a positioning block in a sliding manner, the positioning block is provided with a second V-shaped groove, and the second V-shaped groove is provided with a second V-shaped groove. Notches of the two second V-shaped grooves are oppositely arranged in the sliding direction of the vertical rods, a laser distance measuring sensor is arranged at the same position of each positioning block, the mounting block is connected to one of the vertical rods in a sliding mode, and the measuring column is arranged on the mounting block and moves in the sliding direction of the vertical rods. The device is rapid and convenient to measure the symmetry degree, and compared with a traditional method, the key groove symmetry degree error can be obtained only through one-time calculation, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of symmetry error measuring devices of keyway on shaft parts. BACKGROUND

[0002] The symmetry error measurement of keyway on existing shaft parts has the following disadvantages:

[0003] If using deflection instrument cooperates with dial gauge measurement, data can be obtained by multiple conversion and adjustment, detection efficiency is extremely low, and it is difficult to meet the demand of batch production.

[0004] Although three-coordinate measuring machine is high in accuracy, detection time is long, equipment cost is high, and it is strictly required to operating environment, not suitable for production site rapid detection.

[0005] Contact type measuring tool (such as vernier caliper or mechanical gauge) can scratch keyway surface in operation, especially for high-precision or surface-treated parts, which significantly affects, increases repair or scrap risk. SUMMARY

[0006] The utility model provides a kind of symmetry error measuring devices of keyway on shaft parts to solve the problems existing in the above prior art.

[0007] The technical scheme adopted by the utility model has:

[0008] A kind of symmetry error measuring device of keyway on shaft parts, including base, positioning block, stand, mounting block, measuring column and laser ranging sensor, the first V-shaped groove with vertical upward is equipped in the base, two stand is located in the two sides of the first V-shaped groove and can slide on the base, positioning block is slidably connected on each stand, the second V-shaped groove is equipped in positioning block, the slot of two second V-shaped grooves is arranged towards along the sliding direction of stand, a laser ranging sensor is arranged in the same position of each positioning block, mounting block is slidably connected on one of stand, measuring column is equipped in mounting block, and displacement occurs along the sliding direction of stand.

[0009] Further, the rectangular slot is equipped in the mounting block, the slot of rectangular slot is downward, pressure block is inserted in rectangular slot, locking bolt is respectively screw-connected on the two side end faces of mounting block, and two locking bolts respectively drive pressure block to occur downward displacement and displacement towards the sliding direction of stand.

[0010] Further, the first V-shaped groove is fixed on the cushion in the base.

[0011] Further, the slide rail is equipped in the base, and the stand is slidably connected on the slide rail.

[0012] Further, a cross arm is slidably connected to one of the vertical rods, and the cross arm is arranged towards the sliding direction of the vertical rod, and the mounting block is inserted into the cross arm.

[0013] The utility model has the advantages of the following beneficial effects:

[0014] 1. The device is fast and convenient to measure symmetry, and the keyway symmetry error can be obtained through one calculation, and the detection efficiency is improved.

[0015] 2. The device is simple in structure, mainly fixed by a locking screw, fast to install, and not high in requirement for the operation environment, convenient to transport, and can adapt to detection requirements in various occasions.

[0016] 3. The device tool adopts a laser ranging sensor, greatly reduces the abrasion problem of the measuring tool on the measured workpiece during the operation process, and avoids the risk of workpiece repair or scrapping.

[0017] 4. The device is simple to operate, does not need to be operated by professional personnel, and can be mastered by ordinary workers after simple training, thereby saving part of the labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a structural drawing of the utility model.

[0019] Fig. 2 It is a structural drawing of the utility model.

[0020] Fig. 3 It is a structural drawing of the utility model. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings.

[0022] As Figs. 1 to 3 The utility model discloses a symmetry error measuring device for a keyway on a shaft part, which comprises a base 1, a cushion block 2, a positioning block 3, a vertical rod 4, a mounting block 5, a measuring column 6 and a laser ranging sensor 7.

[0023] The cushion block 2 is fixed on the base 1, and a first V-shaped groove 21 vertically upward is arranged on the cushion block 2, a slide rail is arranged on one side of the cushion block 2, two vertical rods 4 are slidably connected to the slide rail, a locking pin (not shown in the drawing) is screwed on the vertical rod 4 to fix the position of the vertical rod 4 after sliding, and the locking pin is screwed and abuts on the slide rail to fix the position of the vertical rod 4.

[0024] A positioning block 3 is slidably connected on each stand 4. The positioning block 3 is long strip-shaped, and a through hole is arranged on the outer side of the positioning block 3 for sleeving the stand 4. A locking pin (not shown in the figure) is also arranged on the outer wall of the positioning block 3 for fixing the position of the positioning block 3 after sliding. A second V-shaped groove 31 is arranged on the inner side of the positioning block 3, and the grooves of the two second V-shaped grooves 31 are oppositely arranged along the sliding direction of the stand 4.

[0025] A laser ranging sensor 7 is fixed on the same position of each positioning block 3, and the laser ranging signal emitted by the laser ranging sensor 7 is arranged along the sliding direction of the stand 4.

[0026] A cross arm 9 is slidably connected on one of the stands 4, and a locking pin (with the same function as described above) is arranged on the sliding position of the cross arm 9. The cross arm 9 is arranged along the sliding direction of the stand 4, and a mounting block 5 is inserted on the cross arm 9. The mounting block 5 also slides along the sliding direction of the stand 4. A locking pin that can abut against the cross arm 9 is also arranged on the mounting block 5.

[0027] A rectangular groove is arranged on the bottom surface of the mounting block 5, and the groove is downward. A pressing block 8 is inserted in the rectangular groove, and locking bolts 51 are threadedly connected on the two side end surfaces of the mounting block 5, respectively. The two locking bolts 51 abut against the two side end surfaces of the pressing block, respectively, for driving the pressing block 8 to displace downward and along the sliding direction of the stand 4. A measuring column 6 is vertically arranged and threadedly connected at the top end of the pressing block 8.

[0028] In use, the measured cylindrical part is placed in the first V-shaped groove 21 of the cushion block 2, and then the two stands 4 are oppositely slid and symmetrically abut against the measured cylindrical part by the second V-shaped grooves 31. Then, the positions of the two stands 4 are locked by the corresponding locking pins (the two positioning blocks 3 only need to abut against the measured cylindrical part, and the two positioning blocks 3 do not play a role in locking the measured cylindrical part). After the cross arm 9 and the mounting block 5 are assembled, the cross arm 9 is slid on one of the stands 4, and then the pressing block 8 is inserted into the rectangular groove. The position of the cross arm 9 is adjusted so that the measuring column 6 is inserted into the key groove of the measured cylindrical part.

[0029] After the measuring column 6 is inserted into the keyway of the measured cylindrical part, the crossbeam 9 is locked in the position on the corresponding vertical rod 4. Then the tightening bolt 51 on the upper end surface of the mounting block 5 is rotated, so that the pressing block 8 is pressed against the measured cylindrical part. Similarly, the pressing block 8 only needs to be pressed against the measured cylindrical part, and does not play a role in locking the measured cylindrical part. Then the tightening bolt 51 on the side surface is rotated, so that the pressing block 8 is slightly displaced towards the corresponding side vertical rod 4, and the measuring column 6 is pressed against the inner wall surface of the keyway. At this time, the corresponding side laser distance measuring sensor 7 measures the distance between it and the outer wall surface of the measured cylindrical part. For example, if the measuring column 6 is pressed against the right side surface of the keyway, the right side laser distance measuring sensor 7 starts to measure the distance between it and the outer wall surface of the measured cylindrical part. After the measurement on this side is completed, the crossbeam 9 is taken out as a whole together with the mounting block 5, and is inserted into another vertical rod 4 to repeat the same process.

[0030] Finally, the symmetry error is calculated by the formula:

[0031] f=ah / (D-h)

[0032] In the formula, a is the difference between two data of the same cross section; h is the keyway depth; and D is the nominal size of the measured part of the shaft diameter.

[0033] The symmetry error can be obtained by the above formula.

[0034] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, several improvements can be made, and these improvements should also be considered as the protection scope of the present application.

Claims

1. A device for measuring the symmetry error of keyways on shaft-type parts, characterized in that: The utility model relates to a laser ranging sensor measuring device, including base (1), locating block (3), stand (4), mounting block (5), measuring column (6) and laser ranging sensor (7), first V -shaped groove (21) of the notched vertical upwards is equipped on base (1), two stand (4) are equipped in the both sides of first V -shaped groove (21) and can slide on base (1) horizontally, locating block (3) is connected on each stand (4) slidingly, second V -shaped groove (31) is equipped on locating block (3), and the notched of two second V -shaped groove (31) is arranged towards along the sliding direction of stand (4), and the laser ranging sensor (7) of setting is in the same position of each locating block (3), mounting block (5) is connected on one stand (4) slidingly, and measuring column (6) is equipped on mounting block (5), and the displacement along the sliding direction of stand (4) occurs.

2. The device for measuring the symmetry error of the keyway on the shaft part according to claim 1, characterized in that: The rectangular slot of mounting block (5) is provided with the notched downward, and the pressure block (8) is inserted in the rectangular slot, and the locking bolt (51) is respectively connected with the both side end faces of mounting block (5) threadedly, and the displacement downward and the displacement of the sliding direction of stand (4) of pressure block (8) are driven respectively by two locking bolts (51).

3. The device for measuring the symmetry error of the keyway on the shaft part according to claim 1, wherein: The base (1) is fixed with the cushion block (2), and the first V -shaped groove (21) is arranged on the cushion block (2).

4. The device for measuring the symmetry error of the keyway on the shaft part according to claim 1, wherein: The base (1) is provided with the slide rail, and the stand (4) is connected on the slide rail slidingly.

5. The device for measuring the symmetry error of the keyway on the shaft part according to claim 1, wherein: The cross arm (9) is connected on one stand (4) slidingly, and the cross arm (9) is arranged towards the sliding direction of stand (4), and the mounting block (5) is inserted on the cross arm (9).

Images