CN112432584B - Device for measuring concentricity of stepped shaft and stepped hole - Google Patents
Device for measuring concentricity of stepped shaft and stepped hole Download PDFInfo
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- CN112432584B CN112432584B CN202011038087.3A CN202011038087A CN112432584B CN 112432584 B CN112432584 B CN 112432584B CN 202011038087 A CN202011038087 A CN 202011038087A CN 112432584 B CN112432584 B CN 112432584B
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- abutting mechanism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
Abstract
The invention relates to the technical field of concentricity detection, in particular to a device for measuring the concentricity of a stepped shaft and a stepped hole, which comprises a fixed frame, a dial indicator, a first abutting mechanism, a connecting mechanism, a second abutting mechanism and a linkage mechanism; the fixed frame is fixed on the frame; the dial indicator is detachably arranged on the fixing frame, and the working end of the dial indicator is mutually abutted with the working end of the first abutting mechanism; the first abutting mechanism is fixed at one end of the fixed frame and is in sliding connection with one end of the connecting mechanism in a depth-adjustable manner; the connecting mechanism is arranged below the first abutting mechanism and is in sliding connection with the first abutting mechanism; the second abutting mechanism is arranged at the lower end of the connecting mechanism and is in sliding connection with the connecting mechanism; the middle part of the linkage mechanism is hinged with the connecting mechanism, and the two ends of the linkage mechanism are respectively hinged with the first abutting mechanism and the second abutting mechanism; this scheme can carry out the concentricity to the outer wall of the stepped shaft of minor diameter and inner wall shoulder hole and detect and be convenient for the reading.
Description
Technical Field
The invention relates to the technical field of concentricity detection, in particular to a device for measuring concentricity of a stepped shaft and a stepped hole.
Background
Concentricity is an important technical index for evaluating cylindrical workpieces, and concentricity errors directly influence the assembly and use of the workpieces. However, when the measured element axis of the workpiece is extremely short, it is very difficult to evaluate the concentricity, and the concentricity is usually evaluated.
Concentricity errors directly affect the fit accuracy and use of the workpiece. The concentricity error is the concentricity which is the non-concentricity of the circle center on the section and the concentricity error is the offset degree of the circle center.
When detecting step shaft and shoulder hole work piece internal diameter, generally need place the work piece centre bore with the percentage table in, when the work piece internal diameter is less, the percentage table is difficult to get into, and is not convenient for observe the percentage table reading.
Disclosure of Invention
For solving the technical problem, the technical scheme solves the problem, can measure the stepped hole with smaller diameter, is convenient for observing data of a dial indicator, and has adjustable length and convenient adjustment.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a device for measuring the concentricity of a stepped shaft and a stepped hole is characterized by comprising a fixed frame, a dial indicator, a first abutting mechanism, a connecting mechanism, a second abutting mechanism and a linkage mechanism;
the fixing frame is fixed on the rack and used for installing the dial indicator and the first abutting mechanism;
the dial indicator is detachably arranged on the fixing frame, and the working end of the dial indicator is mutually abutted with the working end of the first abutting mechanism so as to measure the concentricity of the stepped shaft and the stepped hole;
the first abutting mechanism is fixed at one end of the fixed frame, is in sliding connection with one end of the connecting mechanism in a depth-adjustable manner and is used for transmitting the circumferential run-out displacement of the measured circumferential surface to the detection end of the dial indicator;
the connecting mechanism is arranged below the first abutting mechanism, is connected with the first abutting mechanism in a sliding manner and is used for adjusting the distance between the first abutting mechanism and the second abutting mechanism;
the second abutting mechanism is arranged at the lower end of the connecting mechanism, is connected with the connecting mechanism in a sliding manner and is used for abutting against the circumferential surface to be measured;
and the middle part of the linkage mechanism is hinged with the connecting mechanism, and the two ends of the linkage mechanism are respectively hinged with the first abutting mechanism and the second abutting mechanism so as to transmit the displacement of the second abutting mechanism to the first abutting mechanism.
Preferably, the first abutting mechanism comprises a first mounting frame and a first horizontal moving part;
the first mounting frame is connected with one end of the connecting mechanism in the length direction in a sliding mode and used for mounting the first horizontal moving part;
first horizontal migration portion, the length direction of the first mounting bracket of perpendicular to sets up the one end of keeping away from coupling mechanism at first mounting bracket movingly, with first mounting bracket sliding connection, the work end towards the percentage table and with percentage table work end butt, rotate with the one end of interlock mechanism and be connected for beat the transmission for the percentage table with the circumference.
Preferably, the first mounting frame comprises a first vertical telescopic part and a first horizontal guide part;
the first vertical telescopic part is connected with the connecting mechanism in a sliding manner, and a plurality of positioning holes for adjusting the length of the first vertical telescopic part extending out of the connecting mechanism are uniformly formed in the outer wall along the length direction;
the first horizontal guide part is installed at the top end of the first vertical telescopic part and is perpendicular to the first vertical telescopic part, is in sliding connection with the first horizontal moving part and is used for guiding the first horizontal moving part to move along the direction perpendicular to the first vertical telescopic part.
Preferably, the first horizontal moving part comprises a first sliding block, a first guide convex block and a butting block;
the first sliding block is connected with the first mounting frame in a sliding mode, the moving direction of the first sliding block is perpendicular to the telescopic moving direction of the first mounting frame on the connecting mechanism, and the first sliding block is rotatably connected with one end of the linkage mechanism;
the first guide lugs are arranged on two sides of the first sliding block, are connected with the first mounting frame in a sliding manner and are used for guiding the movement of the first sliding block in a manner of being matched with the first mounting frame;
the butt joint piece is installed in the one end of first slider orientation percentage table, with first mounting bracket clearance fit, with percentage table work end butt.
Preferably, the connecting mechanism comprises a connecting block, a telescopic groove and a positioning assembly;
the two sections at the central position of the connecting block are communicated and are rotationally connected with the middle part of the linkage mechanism;
the telescopic grooves are formed in the two ends of the connecting block, are connected with the first abutting mechanism and the second abutting mechanism in a sliding mode and are used for guiding the first abutting mechanism and the second abutting mechanism;
and the positioning assembly is arranged on the side wall of the connecting block and used for fixing the first abutting mechanism and the second abutting mechanism.
Preferably, the positioning assembly comprises a positioning bolt and an anti-falling baffle;
the positioning bolt is in threaded connection with the connecting block, is clamped with the outer walls of the first abutting mechanism and the second abutting mechanism in a working state and is used for fixing the first abutting mechanism and the second abutting mechanism;
and the anti-falling baffle is arranged on the outer wall of the connecting block and positioned outside the positioning bolt, so that the positioning bolt is prevented from being completely separated from the connecting block.
Preferably, the second abutting mechanism comprises a second mounting frame and a second horizontal moving part;
the second mounting frame is arranged at one end, far away from the first abutting mechanism, of the connecting mechanism and is in sliding connection with the connecting mechanism;
the second horizontal migration portion is installed on the second mounting bracket along the flexible direction movingly of perpendicular to second mounting bracket, rotates with the one end of interlock mechanism and is connected, and the working end and the work piece butt of second horizontal migration portion under the operating condition for carry out the concentricity detection to the work piece.
Preferably, the second mounting frame comprises a second vertical telescopic part and a second horizontal guide part;
the second vertical telescopic part is connected with one end of the connecting mechanism far away from the first abutting mechanism in a sliding mode, and positioning holes used for adjusting gears are uniformly formed in the outer wall of the second vertical telescopic part along the length direction and used for adjusting the length of the device;
and the second horizontal guide part is vertically arranged at one end of the second vertical telescopic part far away from the connecting mechanism, is in sliding connection with the second horizontal moving part and is used for installing and guiding the second horizontal moving part.
Preferably, the second horizontal moving part comprises a second sliding block, a second guide convex block, a guide rod, a spring and a rotating rod;
the second sliding block is movably arranged on the second mounting frame along the telescopic direction which is vertical to the second mounting frame on the connecting mechanism and is rotationally connected with one end of the linkage mechanism;
the second guide convex blocks are arranged on two sides of the second sliding block and are in sliding connection with the second mounting frame;
the guide rods are arranged at two ends of the second guide convex blocks and are in clearance fit with the second mounting rack;
the springs are sleeved on the guide rods, and two ends of the springs are respectively abutted against the inner sides of the second sliding block and the second mounting frame;
the dwang is installed in the one end of guide bar orientation work piece, rotates with the guide bar and is connected, and the laminating work piece rolls under operating condition.
Preferably, the linkage mechanism comprises a linkage rod, a pin shaft and a turnover block;
the linkage rod is rotatably arranged on the connecting mechanism;
the pin shaft is arranged on the connecting mechanism and is rotationally connected with the linkage rod;
the rotating shafts are arranged on two sides of the turnover block, are rotatably connected with the first abutting mechanism and the connecting mechanism and are in clearance fit with the end part of the linkage rod.
Compared with the prior art, the invention has the beneficial effects that:
1. can measure the less shoulder hole of diameter, be convenient for observe percentage table data, it is concrete, transmit the displacement of second butt mechanism for first butt mechanism through interlock mechanism, transmit the percentage table by first butt mechanism again, realize the displacement transmission from this. The structure consisting of the first abutting mechanism, the connecting mechanism and the second abutting mechanism is inserted into a center hole of the workpiece to carry out measurement, and a dial indicator is not required to be placed inside the workpiece, so that data can be observed conveniently;
2. the length of the device is adjustable in multiple gears, and the adjustment is convenient, specifically, the positioning bolt fixes the first abutting mechanism and the second abutting mechanism through matching with the positioning hole arranged on the outer wall of the first abutting mechanism and the outer wall of the second abutting mechanism. The staff can adjust the gear that first butt mechanism and second butt mechanism slided into the connecting block with the positioning bolt earlier unscrewed. The anti-falling baffle is provided with a hole for the screwdriver to pass through and act on the positioning bolt. The anti-drop baffle has injectd the biggest displacement that positioning bolt screwed out the connecting block, makes it unable and the connecting block complete separation, so avoided the trouble that need look for the screw installation again at every turn.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 3; (ii) a
FIG. 5 is a side view of the present invention;
FIG. 6 is a partial perspective view of the present invention;
FIG. 7 is a perspective view of a first abutment structure of the present invention;
FIG. 8 is a perspective view of the coupling mechanism of the present invention;
FIG. 9 is a perspective view of a second abutment mechanism of the present invention;
fig. 10 is a perspective view of the interlocking mechanism of the present invention.
The reference numbers in the figures are:
1-a fixed mount;
2-dial indicator;
3-a first abutment mechanism; 3 a-a first mounting frame; 3a 1-a first vertical telescopic part; 3a2 — first horizontal guide; 3 b-a first horizontal moving part; 3b1 — first slider; 3b2 — first guide tab; 3b 3-abutment block;
4-a connection mechanism; 4 a-connecting block; 4 b-a telescopic groove; 4 c-a positioning assembly; 4c 1-set screw; 4c 2-anti-drop baffle;
5-a second abutment mechanism; 5 a-a second mounting frame; 5a 1-a second vertical telescoping section; 5a2 — second horizontal guide; 5 b-a second horizontal moving part; 5b1 — second slider; 5b2 — second guide tab; 5b 3-guide bar; 5b 4-spring; 5b 5-rotating levers;
6-a linkage mechanism; 6 a-linkage rod; 6 b-a pin shaft; 6 c-turning block.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
As shown in fig. 1 to 4, a device for measuring the concentricity of a stepped shaft and a stepped hole comprises a fixed frame 1, a dial indicator 2, a first abutting mechanism 3, a connecting mechanism 4, a second abutting mechanism 5 and a linkage mechanism 6;
the fixing frame 1 is fixed on the rack and used for mounting the dial indicator 2 and the first abutting mechanism 3;
the dial indicator 2 is detachably arranged on the fixed frame 1, and the working end of the dial indicator is mutually abutted with the working end of the first abutting mechanism 3 so as to measure the concentricity of the stepped shaft and the stepped hole;
the first abutting mechanism 3 is fixed at one end of the fixed frame 1, is in sliding connection with one end of the connecting mechanism 4 in a depth-adjustable manner and is used for transmitting the circumferential run-out displacement of the measured circumferential surface to the detection end of the dial indicator 2;
the connecting mechanism 4 is arranged below the first abutting mechanism 3, is connected with the first abutting mechanism 3 in a sliding mode, and is used for adjusting the distance between the first abutting mechanism 3 and the second abutting mechanism 5;
the second abutting mechanism 5 is arranged at the lower end of the connecting mechanism 4, is connected with the connecting mechanism 4 in a sliding way and is used for abutting against the circumferential surface to be measured;
and the linkage mechanism 6 is hinged with the connecting mechanism 4 at the middle part, and hinged with the first abutting mechanism 3 and the second abutting mechanism 5 at the two ends respectively, so as to transmit the displacement of the second abutting mechanism 5 to the first abutting mechanism 3.
The dial indicator 2 is electrically connected with the controller. When the staff need measure the step shaft of work piece, fix the device through mount 1, then with second butt mechanism 5 butt on the outer wall of quilt survey step shaft, then stretch into the shoulder hole and butt on the shoulder hole inner wall with second butt mechanism 5 when measuring the shoulder hole. The worker rotates the workpiece at a high speed through the rotating device to measure the concentricity of the workpiece. When the concentricity of the workpiece is insufficient, the second abutting mechanism 5 is displaced in the radial direction of the workpiece by the force, and the displacement of the second abutting mechanism 5 is transmitted to the first abutting mechanism 3 through the link mechanism 6. The first abutting mechanism 3 transmits the displacement to the dial indicator 2 through the abutting action with the dial indicator 2, and the dial indicator 2 measures the concentricity of the workpiece. When the stepped shaft or other sections on the stepped hole axis need to be measured, the fixing frame 1 is moved along the workpiece axis direction, and the angle of the linkage mechanism 6 is adjusted to enable the second abutting mechanism 5 to abut against the outer wall/inner wall of the workpiece again. And then continuing to measure the workpiece. When a workpiece with a longer axis needs to be measured, the whole length of the device can be adjusted by adjusting the depth of the first abutting mechanism 3 and the second abutting mechanism 5 sliding into the connecting mechanism 4 by a worker, and the length of the device can be reduced under a non-working state so as to be convenient to store and move. The outer walls of the first abutting mechanism 3 and the second abutting mechanism 5 are provided with scale marks which are convenient for identifying gears or depths, and the scale marks are not shown in the figure. When the lengths of the parts of the first abutting mechanism 3 and the second abutting mechanism 5 extending out of the connecting mechanism 4 are the same, the equal proportion transmission of displacement can be realized.
As shown in fig. 5, the first abutting mechanism 3 includes a first mount frame 3a and a first horizontal moving portion 3 b;
a first mounting frame 3a slidably connected to one end of the connecting mechanism 4 in the longitudinal direction for mounting the first horizontal moving portion 3 b;
first horizontal migration portion 3b, the length direction of the first mounting bracket of perpendicular to 3a sets up the one end of keeping away from coupling mechanism 4 at first mounting bracket 3a movingly, with first mounting bracket 3a sliding connection, the work end towards percentage table 2 and with 2 work end butts of percentage table, rotate with the one end of interlock mechanism 6 and be connected for beat the transmission for percentage table 2 with the circumference.
The staff adjusts the length of the whole device by adjusting the sliding depth of the first mounting frame 3a into the connecting mechanism 4, so as to be suitable for measuring stepped shafts or stepped holes with different lengths. The interlocking mechanism 6 drives the first horizontal moving part 3b to move in the direction of approaching or departing the dial indicator 2 at the end of the first mounting frame 3a far away from the connecting mechanism 4, so that the circumferential run-out is transmitted to the dial indicator 2.
As shown in fig. 6 and 7, the first mounting bracket 3a includes a first vertical expansion part 3a1 and a first horizontal guide part 3a 2;
the first vertical telescopic part 3a1 is connected with the connecting mechanism 4 in a sliding way, and a plurality of positioning holes for adjusting the length of the first vertical telescopic part extending out of the connecting mechanism 4 are uniformly arranged on the outer wall of the first vertical telescopic part along the length direction;
the first horizontal guiding part 3a2, installed at the top end of the first vertical telescopic part 3a1 and perpendicular to the first vertical telescopic part 3a1, is connected with the first horizontal moving part 3b in a sliding manner, so as to guide the first horizontal moving part 3b to move along the direction perpendicular to the first vertical telescopic part 3a 1.
The first horizontal moving portion 3b is an operating end of the first abutment mechanism 3. The staff carries out flexible regulation with first vertical pars contractilis 3a1 in coupling mechanism 4 one end, then utilizes the locating hole alignment of first vertical pars contractilis 3a1 outer wall to fix, avoids taking place unnecessary flexible under the operating condition. The first horizontal guide part 3a2 is provided with sliding grooves at two sides thereof, which are slidably connected with the first horizontal moving part 3b, so as to guide the movement of the first horizontal moving part 3b, and the first horizontal moving part 3b and the second abutting mechanism 5 have opposite movement directions in parallel.
As shown in fig. 7, the first horizontal moving portion 3b includes a first slider 3b1, a first guide projection 3b2, and an abutment block 3b 3;
the first sliding block 3b1 is connected with the first mounting frame 3a in a sliding way, the moving direction of the first sliding block is perpendicular to the telescopic moving direction of the first mounting frame 3a on the connecting mechanism 4, and the first sliding block is rotatably connected with one end of the linkage mechanism 6;
the first guide projections 3b2 are mounted on two sides of the first sliding block 3b1, are connected with the first mounting frame 3a in a sliding manner, and are used for guiding the movement of the first sliding block 3b1 by matching with the first mounting frame 3 a;
the butt piece 3b3 is installed in the one end of first slider 3b1 orientation percentage table 2, with first mounting bracket 3a clearance fit, with the 2 work ends butt of percentage table.
The linkage mechanism 6 drives the first sliding block 3b1 to perform linear displacement, the first guide convex block 3b2 plays a role in guiding through matching with a sliding groove in the first mounting frame 3a, and force is transmitted to the dial indicator 2 through the abutting block 3b3, so that displacement transmission is realized. Thereby detecting the concentricity of the workpiece.
As shown in fig. 8, the connecting mechanism 4 comprises a connecting block 4a, a telescopic groove 4b and a positioning component 4 c;
the connecting block 4a is communicated with two sections at the central position and is rotationally connected with the middle part of the linkage mechanism 6;
the telescopic grooves 4b are formed at two ends of the connecting block 4a, are connected with the first abutting mechanism 3 and the second abutting mechanism 5 in a sliding mode, and are used for guiding the first abutting mechanism 3 and the second abutting mechanism 5;
and the positioning assembly 4c is arranged on the side wall of the connecting block 4a and is used for fixing the first abutting mechanism 3 and the second abutting mechanism 5.
One ends of the first abutting mechanism 3 and the second abutting mechanism 5 are inserted into both end positions of the connecting block 4a through the telescopic grooves 4b, so that the first abutting mechanism 3 and the second abutting mechanism 5 are telescopically slid at both ends of the connecting block 4 a. The first abutment mechanism 3 and the second abutment mechanism 5 are then fixed to the connecting mechanism 4 by the positioning assembly 4c so that unnecessary sliding does not occur in the operating state thereof.
As shown in fig. 8, the positioning assembly 4c includes a positioning bolt 4c1 and a falling-off prevention baffle 4c 2;
the positioning bolt 4c1 is in threaded connection with the connecting block 4a, is clamped with the outer walls of the first abutting mechanism 3 and the second abutting mechanism 5 in a working state, and is used for fixing the first abutting mechanism 3 and the second abutting mechanism 5;
and an anti-falling baffle 4c2 mounted on the outer wall of the connecting block 4a and located outside the positioning bolt 4c1 for preventing the positioning bolt 4c1 from being completely separated from the connecting block 4 a.
The positioning bolt 4c1 fixes the first abutment mechanism 3 and the second abutment mechanism 5 by engaging with a positioning hole provided in the outer wall of the first abutment mechanism 3 and the second abutment mechanism 5. The worker can adjust the gear of the first abutting mechanism 3 and the second abutting mechanism 5 sliding into the connecting block 4a by unscrewing the positioning bolt 4c 1. The anti-falling baffle 4c2 is provided with a hole for a screwdriver to pass through and act on the positioning bolt 4c 1. The anti-falling baffle 4c2 limits the maximum displacement of the positioning bolt 4c1 screwed out of the connecting block 4a, so that the positioning bolt cannot be completely separated from the connecting block 4a, and the trouble of re-finding the screw for installation every time is avoided.
As shown in fig. 5, the second abutting mechanism 5 includes a second mounting bracket 5a and a second horizontal moving portion 5 b;
the second mounting frame 5a is mounted at one end, far away from the first abutting mechanism 3, of the connecting mechanism 4 and is connected with the connecting mechanism 4 in a sliding mode;
the second horizontal moving portion 5b is mounted on the second mounting frame 5a along a direction perpendicular to the extension and contraction direction of the second mounting frame 5a, is rotatably connected with one end of the linkage mechanism 6, and is abutted against the workpiece by the working end of the second horizontal moving portion 5b in a working state so as to detect the concentricity of the workpiece.
The second mount 5a is extended and contracted at one end of the connection mechanism 4, whereby the length of the entire device is adjusted. The working end of the second horizontal moving portion 5b abuts on the circumferential outer/inner wall of the workpiece to detect the concentricity thereof. When the work piece is rotatory around self axis, when the concentricity had the error, second horizontal migration portion 5b was kept away from the one end of coupling mechanism 4 at second mounting bracket 5a and is slided along the work piece radial to promote the one end of interlock mechanism 6, interlock mechanism 6 then transmits power for the first butt mechanism 3 of the other end.
As shown in fig. 6 and 9, the second mounting bracket 5a includes a second vertical expansion part 5a1 and a second horizontal guide part 5a 2;
the second vertical telescopic part 5a1 is in sliding connection with one end of the connecting mechanism 4 far away from the first abutting mechanism 3, and positioning holes for adjusting gears are uniformly formed in the outer wall along the length direction and used for adjusting the length of the device;
and a second horizontal guide part 5a2 vertically installed on one end of the second vertical telescopic part 5a1 far from the connecting mechanism 4, and slidably connected with the second horizontal moving part 5b for installing and guiding the second horizontal moving part 5 b.
The length of the connecting mechanism 4 extending into the connecting mechanism 4 is adjusted among different gears through the matching of the positioning bolt 4c1 of the connecting mechanism 4 and the positioning hole on the outer wall of the second vertical telescopic part 5a 1. The second horizontal guide portion 5a2 has a slide groove formed along the longitudinal direction thereof to be slidably engaged with the second horizontal moving portion 5b, and guides the movement of the second horizontal moving portion 5 b.
As shown in fig. 9, the second horizontal moving part 5b includes a second slider 5b1, a second guide projection 5b2, a guide lever 5b3, a spring 5b4, and a rotating lever 5b 5;
a second slider 5b1, which is movably mounted on the second mounting rack 5a along the direction perpendicular to the extension and contraction direction of the second mounting rack 5a on the connecting mechanism 4, and is rotatably connected with one end of the interlocking mechanism 6;
the second guide convex blocks 5b2 are arranged at two sides of the second sliding block 5b1 and are connected with the second mounting rack 5a in a sliding way;
guide bars 5b3 installed at both ends of the second guide protrusions 5b2 and in clearance fit with the second mounting bracket 5 a;
a pair of springs 5b4 sleeved on the guide rod 5b3, and both ends of the springs are respectively abutted against the inner sides of the second slide block 5b1 and the second mounting rack 5 a;
the rotating lever 5b5 is attached to one end of the guide lever 5b3 facing the workpiece, and is rotatably connected to the guide lever 5b3 so as to be in contact with the workpiece and roll in the operating state.
When the rotating lever 5b5 abuts against the outer peripheral wall or the inner peripheral wall of the workpiece, the rotating lever 5b5 pushes the second slider 5b1 to the other end of the second mounting bracket 5a through the guide lever 5b3, thereby driving one end of the interlocking mechanism 6 to move. The spring 5b4 plays a role of elastic support to ensure that the side wall of the rotating rod 5b5 is always abutted with the workpiece in the working state. The structure of the rotating rod 5b5 changes sliding friction into rolling friction, avoids damage to the workpiece or device due to long-time contact with the workpiece, and prolongs the service life.
As shown in fig. 10, the linkage mechanism 6 includes a linkage rod 6a, a pin 6b and a turning block 6 c;
the linkage rod 6a is rotatably arranged on the connecting mechanism 4;
the pin shaft 6b is arranged on the connecting mechanism 4 and is rotationally connected with the linkage rod 6 a;
the turning block 6c is provided with rotating shafts on two sides, is rotatably connected with the first abutting mechanism 3 and the connecting mechanism 4, and is in clearance fit with the end part of the linkage rod 6 a.
When the linkage rod 6a rotates around the pin shaft 6b, two ends of the linkage rod and the turning block 6c slide relatively, and the turning block 6c pushes the first abutting mechanism 3 and the connecting mechanism 4 to do linear motion through the rotating connection with the first abutting mechanism 3 and the connecting mechanism 4.
The working principle of the invention is as follows:
the device realizes the functions of the invention through the following steps, thereby solving the technical problems provided by the invention:
step one, when a worker needs to measure the stepped shaft of the workpiece, the device is fixed through the fixing frame 1, then the second abutting mechanism 5 abuts against the outer wall of the measured stepped shaft, and when the stepped hole is measured, the second abutting mechanism 5 extends into the stepped hole and abuts against the inner wall of the stepped hole.
And secondly, enabling the workpiece to rotate at a high speed through a rotating device by a worker to measure the concentricity of the workpiece.
And step three, when the concentricity of the workpiece is insufficient, the second abutting mechanism 5 is stressed and then displaces along the radial direction of the workpiece, and the displacement of the second abutting mechanism 5 is transmitted to the first abutting mechanism 3 through the linkage mechanism 6. The first abutting mechanism 3 transmits the displacement to the dial indicator 2 through the abutting action with the dial indicator 2, and the dial indicator 2 measures the concentricity of the workpiece.
And step four, when the step shaft or other sections on the step hole axis need to be measured, the fixing frame 1 is moved along the workpiece axis direction, and the angle of the linkage mechanism 6 is adjusted to enable the second abutting mechanism 5 to abut against the outer wall/inner wall of the workpiece again. And then continuing to measure the workpiece.
And step five, when a workpiece with a longer axis needs to be measured, the whole length of the device is adjusted by adjusting the depth of the first abutting mechanism 3 and the second abutting mechanism 5 sliding into the connecting mechanism 4 by a worker, and the length of the device can be reduced under a non-working state so as to be convenient to store and move. All be equipped with the scale mark of being convenient for discern gear or degree of depth on first butt mechanism 3 and the 5 outer walls of second butt mechanism. When the lengths of the parts of the first abutting mechanism 3 and the second abutting mechanism 5 extending out of the connecting mechanism 4 are the same, the equal proportion transmission of displacement can be realized.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A device for measuring the concentricity of a stepped shaft and a stepped hole is characterized by comprising a fixed frame (1), a dial indicator (2), a first abutting mechanism (3), a connecting mechanism (4), a second abutting mechanism (5) and a linkage mechanism (6);
the fixing frame (1) is fixed on the rack and used for mounting the dial indicator (2) and the first abutting mechanism (3);
the dial indicator (2) is detachably arranged on the fixed frame (1), and the working end of the dial indicator is mutually abutted with the working end of the first abutting mechanism (3) so as to measure the concentricity of the stepped shaft and the stepped hole;
the first abutting mechanism (3) is fixed at one end of the fixed frame (1), is in sliding connection with one end of the connecting mechanism (4) in a depth-adjustable manner and is used for transmitting the circumferential run-out displacement of the circumferential surface to be detected to the detection end of the dial indicator (2);
the connecting mechanism (4) is arranged below the first abutting mechanism (3), is connected with the first abutting mechanism (3) in a sliding mode and is used for adjusting the distance between the first abutting mechanism (3) and the second abutting mechanism (5);
the second abutting mechanism (5) is arranged at the lower end of the connecting mechanism (4), is connected with the connecting mechanism (4) in a sliding way and is used for abutting against the circumferential surface to be measured;
and the middle part of the linkage mechanism (6) is hinged with the connecting mechanism (4), and the two ends of the linkage mechanism are respectively hinged with the first abutting mechanism (3) and the second abutting mechanism (5) so as to transmit the displacement of the second abutting mechanism (5) to the first abutting mechanism (3).
2. A device for measuring the concentricity of a stepped shaft and a stepped hole according to claim 1, wherein the first abutting means (3) comprises a first mounting frame (3a) and a first horizontal moving part (3 b);
a first mounting frame (3a) which is connected with one end of the connecting mechanism (4) in the length direction in a sliding manner and is used for mounting a first horizontal moving part (3 b);
first horizontal migration portion (3b), the length direction of the first mounting bracket of perpendicular to (3a) sets up the one end of keeping away from coupling mechanism (4) in first mounting bracket (3a) movingly, with first mounting bracket (3a) sliding connection, the work end towards percentage table (2) and with percentage table (2) work end butt, rotate with the one end of interlock mechanism (6) and be connected for beat the transmission for percentage table (2) with the circumference.
3. A device for measuring the concentricity of a stepped shaft and a stepped hole according to claim 2, wherein the first mounting frame (3a) comprises a first vertical telescopic part (3a1) and a first horizontal guiding part (3a 2);
the first vertical telescopic part (3a1) is connected with the connecting mechanism (4) in a sliding way, and a plurality of positioning holes used for adjusting the length of the extending connecting mechanism (4) are uniformly formed in the outer wall of the first vertical telescopic part along the length direction;
and the first horizontal guide part (3a2) is installed at the top end of the first vertical telescopic part (3a1) and is perpendicular to the first vertical telescopic part (3a1), is connected with the first horizontal moving part (3b) in a sliding way, and is used for guiding the first horizontal moving part (3b) to move along the direction perpendicular to the first vertical telescopic part (3a 1).
4. The device for measuring the concentricity of a stepped shaft and a stepped hole as claimed in claim 2, wherein the first horizontal moving part (3b) comprises a first slide block (3b1), a first guide lug (3b2) and an abutting block (3b 3);
the first sliding block (3b1) is connected with the first mounting rack (3a) in a sliding mode, the moving direction of the first sliding block is perpendicular to the telescopic moving direction of the first mounting rack (3a) on the connecting mechanism (4), and the first sliding block is rotatably connected with one end of the linkage mechanism (6);
the first guide lugs (3b2) are arranged on two sides of the first sliding block (3b1), are connected with the first mounting frame (3a) in a sliding mode and are used for guiding the movement of the first sliding block (3b1) in a matching mode with the first mounting frame (3 a);
the butt piece (3b3) is installed in the one end of first slider (3b1) orientation percentage table (2), with first mounting bracket (3a) clearance fit, with percentage table (2) work end butt.
5. The device for measuring the concentricity of the stepped shaft and the stepped hole as claimed in claim 1, wherein the connecting mechanism (4) comprises a connecting block (4a), a telescopic groove (4b) and a positioning component (4 c);
the two sections at the central position of the connecting block (4a) are communicated and are rotationally connected with the middle part of the linkage mechanism (6);
the telescopic grooves (4b) are formed in the two ends of the connecting block (4a), are connected with the first abutting mechanism (3) and the second abutting mechanism (5) in a sliding mode, and are used for guiding the first abutting mechanism (3) and the second abutting mechanism (5);
and the positioning assembly (4c) is arranged on the side wall of the connecting block (4a) and used for fixing the first abutting mechanism (3) and the second abutting mechanism (5).
6. The device for measuring the concentricity of the stepped shaft and the stepped hole as claimed in claim 5, wherein the positioning assembly (4c) comprises a positioning bolt (4c1) and a falling-off prevention baffle (4c 2);
the positioning bolt (4c1) is in threaded connection with the connecting block (4a), is clamped with the outer walls of the first abutting mechanism (3) and the second abutting mechanism (5) in a working state and is used for fixing the first abutting mechanism (3) and the second abutting mechanism (5);
and the anti-falling baffle (4c2) is arranged on the outer wall of the connecting block (4a) and is positioned outside the positioning bolt (4c1) to prevent the positioning bolt (4c1) from being completely separated from the connecting block (4 a).
7. A device for measuring the concentricity of a stepped shaft and a stepped hole according to claim 1, wherein the second abutting means (5) comprises a second mounting frame (5a) and a second horizontal moving part (5 b);
the second mounting frame (5a) is mounted at one end, far away from the first abutting mechanism (3), of the connecting mechanism (4) and is in sliding connection with the connecting mechanism (4);
and the second horizontal moving part (5b) is mounted on the second mounting frame (5a) in a manner of moving along the direction perpendicular to the stretching direction of the second mounting frame (5a), is rotatably connected with one end of the linkage mechanism (6), and is abutted against the workpiece by the working end of the second horizontal moving part (5b) in a working state so as to detect the concentricity of the workpiece.
8. A device for measuring the concentricity of a stepped shaft and a stepped hole as claimed in claim 7, wherein the second mounting bracket (5a) comprises a second vertical telescopic part (5a1) and a second horizontal guiding part (5a 2);
the second vertical telescopic part (5a1) is in sliding connection with one end, far away from the first abutting mechanism (3), of the connecting mechanism (4), and positioning holes for adjusting gears are uniformly formed in the outer wall of the second vertical telescopic part along the length direction and used for adjusting the length of the device;
and the second horizontal guide part (5a2) is vertically arranged at one end of the second vertical telescopic part (5a1) far away from the connecting mechanism (4) and is connected with the second horizontal moving part (5b) in a sliding way so as to install and guide the second horizontal moving part (5 b).
9. The device for measuring the concentricity of the stepped shaft and the stepped hole of claim 7, wherein the second horizontal moving part (5b) comprises a second slide block (5b1), a second guide lug (5b2), a guide rod (5b3), a spring (5b4) and a rotating rod (5b 5);
the second sliding block (5b1) is movably arranged on the second mounting rack (5a) along the extending direction which is vertical to the second mounting rack (5a) on the connecting mechanism (4), and is rotatably connected with one end of the linkage mechanism (6);
the second guide convex blocks (5b2) are arranged at two sides of the second sliding block (5b1) and are connected with the second mounting rack (5a) in a sliding way;
guide rods (5b3) mounted at both ends of the second guide protrusions (5b2) and in clearance fit with the second mounting bracket (5 a);
a pair of springs (5b4) sleeved on the guide rod (5b3), and two ends of each spring are respectively abutted with the inner sides of the second sliding block (5b1) and the second mounting frame (5 a);
and the rotating rod (5b5) is arranged at one end of the guide rod (5b3) facing the workpiece, is rotatably connected with the guide rod (5b3), and is attached to the workpiece to roll in the working state.
10. The device for measuring the concentricity of the stepped shaft and the stepped hole as claimed in claim 1, wherein the linkage mechanism (6) comprises a linkage rod (6a), a pin shaft (6b) and a turning block (6 c);
the linkage rod (6a) is rotatably arranged on the connecting mechanism (4);
the pin shaft (6b) is arranged on the connecting mechanism (4) and is rotationally connected with the linkage rod (6 a);
and the two sides of the turning block (6c) are provided with rotating shafts which are rotatably connected with the first abutting mechanism (3) and the connecting mechanism (4) and are in clearance fit with the end part of the linkage rod (6 a).
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| CN202011038087.3A CN112432584B (en) | 2020-09-28 | 2020-09-28 | Device for measuring concentricity of stepped shaft and stepped hole |
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| CN202011038087.3A CN112432584B (en) | 2020-09-28 | 2020-09-28 | Device for measuring concentricity of stepped shaft and stepped hole |
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| CN112432584B true CN112432584B (en) | 2022-04-22 |
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| CN112432584A (en) | 2021-03-02 |
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