CN215217471U

CN215217471U - Shaft type machine part flat key keyway symmetry detection device

Info

Publication number: CN215217471U
Application number: CN202121195990.0U
Authority: CN
Inventors: 刘建; 刘香妤
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-17
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses an axle type machine part parallel key keyway symmetry detection device, including fixed measuring seat and activity measurement seat, be provided with the inclined plane on fixed measuring seat and activity measurement seat symmetrically, be provided with the right angle measuring head simultaneously on fixed measuring seat and activity measurement seat and the lower extreme that is located the inclined plane symmetrically, be provided with the isosceles wedge between the inclined plane of both sides, and the inclined plane sliding fit of isosceles wedge and both sides, be provided with the slip table symmetrically on fixed measuring seat, measure the one end fixedly connected with "U" type sliding sleeve of seat at the activity. The utility model discloses a fixed measuring seat and the right angle measuring head of activity measuring seat lower part come the flat key keyway of location axle type part, and the position size of axle type part generating line is measured to two micrometer of reuse, and the difference of two micrometer readings is the actual error of this flat key keyway symmetry promptly.

Description

Shaft type machine part flat key keyway symmetry detection device

Technical Field

The utility model relates to an axle type machine part parallel key keyway symmetry detection device belongs to keyway symmetry and detects frock technical field.

Background

The machining of the flat key groove of the mechanical shaft part is generally realized by directly milling the flat key groove by using a key groove milling cutter, and because the directions of milling forces cannot be symmetrical, the key groove milling cutter deflects along the opposite direction of the milling forces, and the precision requirement of the symmetry degree of the shaft flat key groove relative to the axis is seriously influenced. In order to avoid the machining problem, a small-size key groove milling cutter is usually adopted to mill two side surfaces of the key groove respectively in production, but the accuracy of the symmetry degree of the key groove relative to the axis of the key groove is difficult to control.

The detection of the symmetry degree of the flat key keyway relative to the axis thereof is a seemingly simple precision detection problem, but a simple detection method is lacked for a long time, particularly the detection cannot be carried out on a production field, and the detection method is a long-standing puzzle and pain point in the machining industry. Currently, several commonly used detection methods are characterized in that:

a. the deflection instrument is positioned by a tip, and a dial indicator is leaned against a flat key to detect through conversion and comparison. The method has low detection efficiency, and the size error of the key slot is the theoretical error of measurement, so the method is not suitable for mass production.

b. And (5) detecting by using a three-coordinate detection device. The method has low detection efficiency and high detection equipment cost, and is not suitable for batch production.

c. And detecting by using a vernier scale for symmetry of the flat key groove. The method also has the problems of detection and positioning errors (the size error of the key groove is the theoretical positioning error, the positioning surface of the key groove is too small, and the positioning is unreliable), the operation technical requirement is higher, and the method is rarely used at present.

d. And detecting by using a special detection tool in combination with a dial indicator, a vernier and the like. The detection tool is complex in structure and operation, low in efficiency, high in operation technical requirement and free of universality.

Therefore, the detection of the flat key groove relative to the axial symmetry (hereinafter referred to as the key groove symmetry) is always a difficult point, and the key groove symmetry precision in production is very short of the requirement, so that a plurality of parts are in faulty operation, the service life of the flat key structure part is seriously influenced, equipment faults are often caused, and a great deal of hidden danger is brought to the safe operation of the equipment.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an axle type machine part parallel key keyway symmetry detection device, the device not only easy operation, detection efficiency are high, the commonality is strong, detects the precision height moreover, can satisfy the detection requirement of counter shaft type machine part parallel key keyway symmetry in the production process.

The utility model discloses a constitute like this: a device for detecting the symmetry degree of a flat key keyway of a shaft type mechanical part comprises a fixed measuring seat and a movable measuring seat, wherein inclined planes are symmetrically arranged on the fixed measuring seat and the movable measuring seat, right-angle measuring heads are symmetrically arranged on the fixed measuring seat and the movable measuring seat and positioned at the lower ends of the inclined planes, an isosceles wedge block is arranged between the inclined planes at two sides and is in sliding fit with the inclined planes at two sides, sliding tables are symmetrically arranged on the fixed measuring seat, a U-shaped sliding sleeve is fixedly connected at one end of the movable measuring seat, the U-shaped sliding sleeve is sleeved on the sliding table and is in sliding fit with the sliding table, a pressing plate is fixedly connected at the top of the fixed measuring seat, a pressing screw is in threaded connection with the center of the top of the isosceles wedge block on the pressing plate, and an L-shaped fixed support and an adjustable support are respectively and fixedly connected at the bottoms of the fixed measuring seat and the movable measuring seat, micrometer measuring heads are symmetrically arranged on the side parts of the L-shaped fixed support and the adjustable support, and a jacking screw is in threaded connection with the bottom of the L-shaped fixed support.

Furthermore, a first waist-shaped counter bore is formed in the movable measuring seat, and a first adjusting screw penetrates through the first waist-shaped counter bore and then is fixedly connected with the adjustable support.

Furthermore, a second waist-shaped counter bore is formed in the L-shaped fixing support, and a second adjusting screw penetrates through the second waist-shaped counter bore and then is fixedly connected with the adjustable support.

Furthermore, a gap is reserved between the U-shaped sliding sleeve and the end part of the fixed measuring seat, and a return spring is installed in the gap.

Since the technical scheme is used, the utility model has the advantages of: the utility model discloses a fixed measuring seat and the right angle measuring head of activity measuring seat lower part come the flat key keyway of location axle type part, and the position size of axle type part generating line is measured to two micrometer of reuse, and the difference of two micrometer readings is the actual error of this flat key keyway symmetry promptly. Therefore, the utility model discloses can solve the convenient detection of production site, can solve the problem that the relative its axis symmetry of parallel key keyway of present most of axle type parts can not reach the required precision, have easy operation, detection efficiency height, the commonality strong, detect advantages such as precision height.

Drawings

Fig. 1 is a perspective view of a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is an exploded view of a schematic of the construction of the gasket;

fig. 3 is a top view of the structure diagram of the present invention;

FIG. 4 is a schematic view of the alignment adjustment block;

FIG. 5 is a schematic structural diagram of the alignment adjustment block during calibration;

fig. 6 is a front view of a schematic structural diagram of a second embodiment of the present invention.

Description of reference numerals: 1-measured workpiece, 2-micrometer head, 3-adjustable support, 4- 'L' -shaped fixed support, 5-fixed measuring seat, 6-movable measuring seat, 7-pressing plate, 8-isosceles wedge-shaped block, 9-compression screw, 10-tightening screw, 11- 'U' -shaped sliding sleeve, 12-inclined plane, 13-right angle measuring head, 14-sliding table, 15-first waist-shaped counter bore, 16-first adjusting screw, 17-reset spring, 18-alignment adjusting block, 19-second waist-shaped counter bore, 20-second adjusting screw, 21-third adjusting screw and 22-fourth adjusting screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail with reference to the accompanying drawings and examples.

The embodiment of the utility model discloses an: as shown in FIGS. 1 to 3, the symmetry degree detecting device for flat key keyways of shaft-like mechanical parts of the present invention comprises a fixed measuring seat 5 and a movable measuring seat 6, wherein inclined planes 12 are symmetrically arranged on the fixed measuring seat 5 and the movable measuring seat 6, right angle measuring heads 13 are symmetrically arranged on the fixed measuring seat 5 and the movable measuring seat 6 and at the lower ends of the inclined planes 12, an isosceles wedge block 8 is arranged between the inclined planes 12 at both sides, the isosceles wedge block 8 is in sliding fit with the inclined planes 12 at both sides, sliding tables 14 are symmetrically arranged on the fixed measuring seat 5, a "U" -shaped sliding sleeve 11 is fixedly connected to one end of the movable measuring seat 6, the "U" -shaped sliding sleeve 11 is sleeved on the sliding table 14 and in sliding fit with the sliding table 14, a pressing plate 7 is fixedly connected to the top of the fixed measuring seat 5, a pressing screw 9 is connected to the pressing plate 7 and at the center of the top of the isosceles wedge block 8, the bottom of the fixed measuring seat 5 and the bottom of the movable measuring seat 6 are respectively and fixedly connected with an L-shaped fixed support 4 and an adjustable support 3, the side parts of the L-shaped fixed support 4 and the adjustable support 3 are symmetrically provided with micrometer measuring heads 2, and the bottom of the L-shaped fixed support 4 is in threaded connection with a jacking screw 10. A first waist-shaped counter bore 15 is formed in the movable measuring seat 6, and a first adjusting screw 16 penetrates through the first waist-shaped counter bore 15 and then is fixedly connected with the adjustable support 3; and a second waist-shaped counter bore 19 is formed in the L-shaped fixed support 4, and a second adjusting screw 20 penetrates through the second waist-shaped counter bore 19 and then is fixedly connected with the adjustable support 3. Because the head and the rod of the adjusting screw have gaps with the waist-shaped counter bore, the transverse fixing position of the adjustable support 3 or the L-shaped fixed support 4 can be conveniently adjusted. A gap is reserved between the end part of the U-shaped sliding sleeve 11 and the end part of the fixed measuring seat 5, and a return spring 17 is installed in the gap, so that the movable measuring seat 6 connected with the U-shaped sliding sleeve 11 always receives the elastic force moving towards the fixed measuring seat 5, and after the compression screw 9 is loosened, the movable measuring seat 6 is convenient to extrude the isosceles wedge-shaped block 8 to reset the isosceles wedge-shaped block.

The utility model discloses a theory of operation:

as shown in fig. 4 and 5, before measurement, the alignment adjusting block 18 is used to correct the detection device, that is, the right-angle measuring heads 13 at the lower parts of the fixed measuring seat 5 and the movable measuring seat 6 are used to position the flat key slots on the alignment adjusting block 18, and then the micrometer measuring heads 2 at the two sides are adjusted to make the readings consistent. At this moment, the detection device is theoretically in a zero-error state, and the key slot symmetry degree on the workpiece 1 to be detected can be accurately detected.

As shown in fig. 1, during detection, a workpiece 1 to be detected is placed into a detection device, a fixed measuring seat 5 and a right-angle measuring head 13 at the lower part of a movable measuring seat 6 are clamped into a flat key groove on the workpiece 1 to be detected, and then a compression screw 9 is rotated to enable an isosceles wedge block 8 to move downwards, so that the right-angle measuring head 13 on the movable measuring seat 6 is opened, and the key groove of the workpiece 1 to be detected is reliably positioned on the right-angle measuring head 13; because keyway processing technology, keyway side and keyway bottom surface are the vertical state, and rotatory top screw 10 this moment makes the keyway bottom of measured work piece 1 and the bottom of right angle measuring head 13 paste tightly, measures the position size of measured work piece 1 generating line with two micrometer 2 at last, and the difference of the reading of two micrometer 2 is the actual error of the keyway symmetry of measured work piece 1 promptly. When the compression screw 9 is rotated reversely, the return spring 17 pulls back the movable measuring seat 6, so that the isosceles wedge-shaped block 8 is reset. Because the isosceles wedge block 8 is always contacted with the inclined planes 12 on the fixed measuring seat 5 and the movable measuring seat 6, the stability of the movable measuring seat during measurement is ensured.

The flat key of each standard size specification should have corresponding keyway detection device, but this detection device must again can detect the diameter of corresponding scope, but micrometer 2's measuring stick diameter generally only 6 to 8mm, to each specification keyway that the diameter is greater than 50mm, can't reach the detection of the whole diameter of corresponding scope. To this, the utility model discloses with adjustable 3 designs of adjustable support structures, to the diameter be greater than 50 mm's corresponding keyway detection device, adjustable support 3 should adjust according to dimensional requirement. During adjustment, the adjusting screw 16 is loosened, the position of the adjustable support 3 can be adjusted due to the gaps between the head and the rod of the adjusting screw 16 and the waist-shaped counter bore 15, and then the adjusting screw 16 is screwed.

The embodiment of the utility model discloses an embodiment two: referring to fig. 6, the structure of the detection apparatus in this embodiment is basically the same as that in the first embodiment, and the difference is that: the adjustable support 3 or the L-shaped fixed support 4 is split into two parts, and the two parts are connected through a third adjusting screw 21 and a fourth adjusting screw 22 respectively. Meanwhile, the screw holes of the third adjusting screw 21 and the fourth adjusting screw 22 are arranged to be waist-shaped counter bores, so that gaps exist between the head part and the rod part of the third adjusting screw 21 or the fourth adjusting screw 22 and the waist-shaped counter bores, and thus the longitudinal fixing position of the adjustable support 3 or the L-shaped fixed support 4 can be adjusted to adapt to the measurement of the large-diameter workpiece 1 to be measured.

To sum up, the utility model discloses a fixed measuring seat 5 and the right angle measuring head 13 of the 6 lower parts of activity measuring seat come the parallel key keyway of location axle type part, and the position size of axle type part generating line is measured to two micrometer of reuse, and the difference of two micrometer readings is the actual error of this parallel key keyway symmetry promptly. Therefore, the utility model discloses can solve the convenient detection of production site, can solve the problem that the relative its axis symmetry of parallel key keyway of present most of axle type parts can not reach the required precision, have easy operation, detection efficiency height, the commonality strong, detect advantages such as precision height.

Claims

1. The utility model provides an axle type machine part parallel key keyway symmetry detection device, includes fixed measuring seat (5) and activity measuring seat (6), its characterized in that: inclined planes (12) are symmetrically arranged on the fixed measuring seat (5) and the movable measuring seat (6), right-angle measuring heads (13) are symmetrically arranged on the fixed measuring seat (5) and the movable measuring seat (6) and positioned at the lower ends of the inclined planes (12), isosceles wedge blocks (8) are arranged between the inclined planes (12) at the two sides, the isosceles wedge blocks (8) are in sliding fit with the inclined planes (12) at the two sides, sliding tables (14) are symmetrically arranged on the fixed measuring seat (5), a U-shaped sliding sleeve (11) is fixedly connected at one end of the movable measuring seat (6), the U-shaped sliding sleeve (11) is sleeved on the sliding table (14) and is in sliding fit with the sliding table (14), a pressing plate (7) is fixedly connected at the top of the fixed measuring seat (5), and a pressing screw (9) is in threaded connection with the center of the top of the isosceles wedge blocks (8) on the pressing plate (7), the bottom of the fixed measuring seat (5) and the bottom of the movable measuring seat (6) are respectively and fixedly connected with an L-shaped fixed support (4) and an adjustable support (3), the side parts of the L-shaped fixed support (4) and the adjustable support (3) are symmetrically provided with micrometer measuring heads (2), and the bottom of the L-shaped fixed support (4) is in threaded connection with a jacking screw (10).

2. The device for detecting the symmetry degree of the flat key and the key groove of the shaft mechanical part according to claim 1 is characterized in that: a first waist-shaped counter bore (15) is formed in the movable measuring seat (6), and a first adjusting screw (16) penetrates through the first waist-shaped counter bore (15) and then is fixedly connected with the adjustable support (3).

3. The device for detecting the symmetry degree of the flat key and the key groove of the shaft mechanical part according to claim 1 is characterized in that: a second waist-shaped counter bore (19) is formed in the L-shaped fixed support (4), and a second adjusting screw (20) penetrates through the second waist-shaped counter bore (19) and then is fixedly connected with the adjustable support (3).

4. The device for detecting the symmetry degree of the flat key and the key groove of the shaft mechanical part according to claim 1 is characterized in that: a gap is reserved between the U-shaped sliding sleeve (11) and the end part of the fixed measuring seat (5), and a return spring (17) is installed in the gap.