CN216898625U - Small-size internal spline M value measuring device without positioning reference - Google Patents
Small-size internal spline M value measuring device without positioning reference Download PDFInfo
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- CN216898625U CN216898625U CN202220481103.4U CN202220481103U CN216898625U CN 216898625 U CN216898625 U CN 216898625U CN 202220481103 U CN202220481103 U CN 202220481103U CN 216898625 U CN216898625 U CN 216898625U
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Abstract
A small-size internal spline M value measuring device without a positioning datum relates to the technical field of precision measurement, and aims to solve the problem that the small-size M value, such as the internal spline M value size smaller than 30mm, cannot be measured by adopting a spline plug gauge to measure the M value in the prior art; the measuring rod, the measuring rod bracket, the measuring head and the measuring head bracket are also included; the measuring head support comprises a measuring head mounting part and a measuring head fixing part; the measuring rod bracket comprises a measuring rod mounting part and a measuring rod fixing part; the upper end of the measuring head mounting part is fixed with a measuring head, and the middle part of the lower end of the measuring head mounting part is inwards sunken to form a groove; the lower end of a measuring rod mounting part of the measuring rod bracket is fixed with a measuring rod, and the upper end of the measuring rod mounting part is embedded into a groove at the lower end of the measuring head mounting part and a gap is reserved; the measuring head fixing part is fixed at the lower part of the front end of the lever through a screw, and the measuring rod fixing part is arranged at the step position of the front end of the body; this novel gauge head and measuring stick can be adjusted, different gear shaft M values of realization measurement.
Description
Technical Field
The utility model relates to the technical field of precision measurement, in particular to a device for measuring an M value of a small-size internal spline without a positioning reference.
Background
At present, when the size of an M value of an internal spline is smaller than 30mm, reading measurement is very difficult, a traditional M value gauge is provided with two measuring rods, two measuring heads are respectively arranged on the two measuring rods, the size of the measuring rod is minimum to be 10mm, the length of the measuring head is also 10mm, and the minimum limit size of the measuring head can be 40mm due to the fact that the two measuring heads are needed.
There are many small internally splined bores in automotive production, such as: the product of about 20mm has synchronizer gear hub, differential mechanism planet bevel gear and power-assisted steering ware output shaft etc., some internal spline tooth broaching or extrusion after still need reprocessing, like planet bevel gear internal spline hole, because some adopted the benchmark have not been had during broaching, so can only detect by internal spline hole itself as the benchmark, tradition adopts spline plug gauge to synthesize the measurement, and the internal spline M value measurement that is less than 20mm is because the size is little in addition, therefore, requires that measuring device's structure is littleer, just so, just leads to current gauge head can't install into measuring device. And because the structural strength and rigidity are low, the reading measurement aims to be accurate, and therefore, almost no successful case exists.
The detection method generally adopted in the prior art is to use a spline plug gauge for comprehensive measurement, the through end of the spline plug gauge can be passed, the stop end of the spline plug gauge cannot be passed, the assembly cannot be ensured, and the specific spline tooth matching method is not considered.
SUMMERY OF THE UTILITY MODEL
The utility model provides a small-size internal spline M value measuring device without a positioning reference, aiming at solving the problem that the small-size M value, such as the size of an internal spline M value smaller than 30mm, cannot be measured by adopting a spline plug gauge to measure the M value in the prior art.
The small-size internal spline M value measuring device without the positioning reference comprises a body, a lever and a measuring meter arranged at the rear end of the lever; the body and the lever are arranged at intervals up and down, and the upper end of the body is rotatably connected with the lever through a lever pin positioned in the middle of the lever; the front end of the body and the lower part of the front end of the lever are provided with steps;
the measuring rod, the measuring rod bracket, the measuring head and the measuring head bracket are also included;
the measuring head is a hard alloy steel ball, and the measuring rod is a hard alloy measuring rod;
the measuring head support comprises a measuring head mounting part and a measuring head fixing part; the measuring rod bracket comprises a measuring rod mounting part and a measuring rod fixing part; the upper end of the measuring head mounting part is fixed with a measuring head, and the middle part of the lower end of the measuring head mounting part is inwards sunken to form a groove;
the lower end of the measuring rod mounting part of the measuring rod bracket is fixed with the measuring rod, and the upper end of the measuring rod mounting part is embedded into the groove at the lower end of the measuring head mounting part and a gap is reserved;
the measuring head fixing part is fixed at the lower part of the front end of the lever through a screw, and the measuring rod fixing part is arranged at the step position of the front end of the body;
the center of the measuring head spherical surface, the axle center of the lever pin and the measuring point of the measuring meter are on the same straight line, and the distance from the center of the measuring head spherical surface to the center of the lever pin is equal to the distance from the center of the lever pin to the measuring point of the measuring meter.
The utility model has the beneficial effects that:
1. the device for measuring the M value of the small-size internal spline without the positioning reference fully utilizes the maximum space, adopts the measurement of the convex-concave two cross-section structures, and the structure enhances the rigidity and strength of measurement and lays a foundation for the stability of measurement.
2. The device for measuring the M value of the small-size internal spline without the positioning reference can measure whether the M value has taper or not.
3. The device for measuring the M value of the small-size internal spline without the positioning reference can realize measurement of the M value in various forms by one operator.
4. The positioning-reference-free small-size internal spline M value measuring device can adjust the sizes of the measuring head and the measuring rod, and can realize measurement of M values of different gear shafts.
Drawings
FIG. 1 is a schematic structural diagram of a small-size internal spline M value measuring device without a positioning reference according to the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a schematic structural diagram of a body of the small-sized internal spline M value measuring device without a positioning reference according to the present invention;
FIG. 4 is a schematic structural diagram of a lever in the device for measuring the M value of the small-sized internal spline without the positioning reference according to the present invention;
FIG. 5 is a front view of the stylus holder;
FIG. 6 is a side view of FIG. 5;
FIG. 7 is a top view of FIG. 5;
FIG. 8 is a front view of the dipstick holder;
FIG. 9 is a side view of FIG. 8;
fig. 10 is a top view of fig. 8.
In the figure, 1, a handle, 2, a body, 3, a fastening screw, 4, a hook, 5, a screw, 6, a C-shaped spring, 7, a measuring rod, 8, a measuring rod bracket, 8-1, a measuring rod bracket mounting part, 8-2, a measuring rod bracket fixing part, 9, a measuring head bracket, 9-1, a measuring head bracket mounting part, 9-2, a measuring head bracket fixing part, 9-3, a groove, 10, a measuring head, 11, a lever, 12, a lever pin, 13, a C-shaped spring hanging pin, 14, a gauge stand, 15, a protective cover, 16 and a dial indicator are arranged.
Detailed Description
The embodiment is described with reference to fig. 1 to 10, and a small-size internal spline M value measuring device without a positioning reference is provided, because the prior art for measuring M value smaller than 20mm has no checking tool or measuring device capable of completing measurement, for this reason, the embodiment provides a small-size internal spline M value measuring device, which comprises a handle 1, a body 2, a fastening screw 3, a hook 4, a screw 5, a C-shaped spring 6, a measuring stick 7, a measuring stick support 8, a measuring head support 9, a measuring head 10, a lever 11, a lever pin 12, a C-shaped spring hanging pin 13, gauge seats 14, 15, a protective cover, and a measuring gauge 16 or sensor; the body 2 and the lever 11 are arranged at intervals up and down, and the upper end of the body 2 is rotatably connected with the lever 11 through a lever pin positioned in the middle of the lever 11; a step is arranged at the corresponding position of the front end of the body 2 and the lower part of the front end of the lever 11; the measuring head also comprises a measuring rod 7, a measuring rod bracket 8, a measuring head 10 and a measuring head bracket 9;
the measuring head 10 is a hard alloy steel ball, and the measuring rod 7 is a hard alloy measuring rod;
the measuring head support 9 comprises a measuring head mounting part 9-1 and a measuring head fixing part 9-2; the measuring rod bracket 8 comprises a measuring rod mounting part 8-1 and a measuring rod fixing part 8-2; a measuring head 10 is fixed at the upper end of the measuring head mounting part 9-1, and the middle part of the lower end is inwards sunken to form a groove 9-3;
the lower end of the measuring rod mounting part of the measuring rod bracket 8 is fixed with the measuring rod 7, and the upper end of the measuring rod mounting part is embedded into the groove at the lower end of the measuring head mounting part and a gap is reserved; the measuring head fixing part 9-2 is fixed at the lower part of the front end of the lever 11 through a screw, and the measuring rod fixing part 8-2 is fixedly arranged at the step position of the front end of the body 2 through a screw 5;
the center of the measuring head spherical surface, the axle center of the lever pin and the measuring point of the measuring meter 16 are on the same straight line, and the distance from the center of the measuring head spherical surface to the center of the lever pin is equal to the distance from the center of the lever pin to the measuring point of the measuring meter.
In this embodiment, the measuring head 10 is riveted to one end of the measuring head support 9, which is far away from the lever pin, and the swinging direction (swinging distance) of the center position of the measuring head 10 is smaller than the perpendicular line of the axis of the measuring rod 7. One end of the measuring bar 7 close to the lever pin is embedded into the measuring bar fixing part 8-2. The diameter of the measuring head 10 is the same as the diameter of the measuring rod 7. The minimum may be 2 mm.
In the embodiment, the body 2 and the handle 1 are fixed by fastening screws, and cavities are formed in the parts correspondingly connected with the upper part of the body 2 and the lower part of the lever 11 and used for installing the C-shaped spring 6; a pair of vertically arranged C-shaped hanging pins 13 are respectively fixed on the body 1 and the lever 11 and are symmetrically arranged relative to the lever pin 12;
an opening with a small outer part and a large inner part is processed on the C-shaped spring 6, an inward-inclined through groove is processed in the middle of the C-shaped hanging pin 13, the opening of the C-shaped spring 6 is clamped in the through groove, and the C-shaped spring 6 and the two hanging pins 13 are connected into a whole under the elastic force action of the C-shaped spring 6.
In the present embodiment, the lever 11 is connected to the upper part of the hook 4 in the cavity; the hook hand 4 is positioned at the right end of the opening side of the C-shaped spring 6;
a chute is formed in the middle of the hook 4, and a hook sliding pin is fixedly connected to the body 2 in the cavity; the lower part of the hook hand 4 is exposed outside the body 2; the hook hand 4 is pulled by external force, and the hook hand sliding pin can move in the chute.
The rear end of the body 2 is provided with a measuring block, and the upper surface of the measuring block is abutted to the measuring head of the measuring meter 16. The meter is mounted on the lever 11 by a meter base 14, and a protective cover 15 is mounted on the meter 16.
In the measuring device according to the present embodiment, the measuring head 10 has a diameter of 2mm, and can measure a measured object having an M value of less than 20mm, for example, 17 mm.
In the measuring device according to the present embodiment, when different M values and sizes are measured, the cemented carbide gauge rod stylus may be replaced, and when the cemented carbide gauge rod stylus is large in height, the measured M value and size are small, whereas when the measured M value and size are large, the cemented carbide gauge rod stylus is small in height.
The measuring device described in this embodiment has the working principle that:
the device adopts a rod and a ball as two measuring heads, does not need a positioning reference, and the maximum value when measuring each section is the M value of the section. As shown in FIG. 1: the M value is embedded on the measuring rod support 8 to measure the hard alloy rod with the measuring rod diameter size, the M value is embedded on the measuring head support 9 to measure the hard alloy measuring ball with the measuring rod diameter size, the maximum visual value of the measuring device during measurement is that the measuring rod completely falls into the internal spline groove, the steel ball completely falls into the value obtained by the measuring device in the internal spline groove, and is also the M value size of the cross section where the center of the steel ball is located, the hook 4 is hooked, the hard alloy measuring rod and the hard alloy steel ball are placed into the tooth groove of the M value of the internal spline to be measured, the hook 4 is loosened, under the action of the measuring force, the maximum visual value of the measuring device is the M value, and is also the stable state of the measuring device.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples are only illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the novel patent. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present new patent shall be subject to the appended claims.
Claims (7)
1. The small-size internal spline M value measuring device without the positioning reference comprises a body (2), a lever (11) and a measuring meter (16) arranged at the rear end of the lever; the body (2) and the lever (11) are arranged at intervals up and down, and the upper end of the body (2) is rotatably connected with the lever (11) through a lever pin positioned in the middle of the lever (11); a step is arranged at the corresponding position of the front end of the body (2) and the lower part of the front end of the lever (11);
the method is characterized in that: the measuring device also comprises a measuring rod (7), a measuring rod bracket (8), a measuring head (10) and a measuring head bracket (9);
the measuring head (10) is a hard alloy steel ball, and the measuring rod (7) is a hard alloy measuring rod;
the measuring head support (9) comprises a measuring head mounting part (9-1) and a measuring head fixing part (9-2); the measuring rod bracket (8) comprises a measuring rod mounting part (8-1) and a measuring rod fixing part (8-2);
the upper end of the measuring head mounting part is fixed with a measuring head (10), and the middle part of the lower end is inwards sunken to form a groove;
the lower end of the measuring rod mounting part of the measuring rod bracket (8) is fixed with the measuring rod (7), and the upper end of the measuring rod mounting part is embedded into the groove at the lower end of the measuring head mounting part and a gap is reserved;
the measuring head fixing part (9-2) is fixed at the lower part of the front end of the lever (11) through a screw, and the measuring rod fixing part (8-2) is arranged at the step position of the front end of the body (2);
the center of the measuring head spherical surface, the axle center of the lever pin and the measuring point of the measuring meter (16) are on the same straight line, and the distance from the center of the measuring head spherical surface to the center of the lever pin is equal to the distance from the center of the lever pin to the measuring point of the measuring meter.
2. The positioning reference-free small-size internal spline M value measuring device according to claim 1, characterized in that:
the measuring head (10) is riveted at one end, far away from the lever pin, of the measuring head support (9), and the center swinging direction of the measuring head (10) is located on the vertical line of the axis of the measuring rod (7).
3. The positioning reference-free small-size internal spline M value measuring device according to claim 1, characterized in that:
one end of the measuring rod (7) close to the lever pin is embedded into the measuring rod fixing part (8-2).
4. The positioning reference-free small-size internal spline M value measuring device according to claim 1, characterized in that:
the diameter of the measuring head (10) is the same as that of the measuring rod (7).
5. The positioning reference-free small-size internal spline M value measuring device according to claim 1, characterized in that:
the body (2) is fixed with the handle (1), and cavities are formed in the parts, correspondingly connected, of the upper part of the body (2) and the lower part of the lever (11) and used for mounting the C-shaped spring (6); a pair of vertically arranged C-shaped hanging pins (13) are respectively fixed on the body (2) and the lever (11) and are symmetrically arranged relative to the lever pin (12);
an opening with a small outer part and a large inner part is processed on the C-shaped spring (6), a through groove with an inward inclination is processed in the middle of the C-shaped hanging pin (13), the opening of the C-shaped spring (6) is clamped in the through groove, and the C-shaped spring (6) and the two hanging pins (17) are connected into a whole under the elastic force action of the C-shaped spring (6).
6. The positioning reference-free small-size internal spline M value measuring device according to claim 5, characterized in that:
the lever (11) is connected with the upper part of the hook hand (4) in the cavity; the hook hand (4) is positioned at the right end of the opening side of the C-shaped spring (6);
a chute is formed in the middle of the hook (4), and a hook sliding pin is fixedly connected to the body (2) in the cavity; the lower part of the hook hand (4) is exposed outside the body (2); the hook hand (4) is pulled by external force, and the hook hand sliding pin can move in the chute.
7. The positioning reference-free small-size internal spline M value measuring device according to claim 1, characterized in that: the rear end of the body (2) is provided with a measuring block, and the upper surface of the measuring block is abutted to the measuring head of the measuring meter (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220481103.4U CN216898625U (en) | 2022-03-07 | 2022-03-07 | Small-size internal spline M value measuring device without positioning reference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220481103.4U CN216898625U (en) | 2022-03-07 | 2022-03-07 | Small-size internal spline M value measuring device without positioning reference |
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| Publication Number | Publication Date |
|---|---|
| CN216898625U true CN216898625U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220481103.4U Active CN216898625U (en) | 2022-03-07 | 2022-03-07 | Small-size internal spline M value measuring device without positioning reference |
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| CN (1) | CN216898625U (en) |
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- 2022-03-07 CN CN202220481103.4U patent/CN216898625U/en active Active
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