Mechanism and method for measuring the angle between the center lines of the oblique mounting holes of a metal rubber spring

Abstract

The metal rubber spring's different surface installation hole center line angle measuring mechanism, including positioning base, its characterized in that: still including along vertical fixed in positioning base's photoelectric measuring column and measuring arm 360 degrees rotatable angle measuring host computer, metal rubber spring is placed on positioning base, angle measuring host computer is placed on metal rubber spring and with metal rubber spring top surface installation hole positioning cooperation, photoelectric measuring column emits along vertical laser beam to positioning base, laser beam and metal rubber spring bottom surface installation hole center line vertically intersect on positioning base, angle measuring host computer's measuring arm rotates to with laser beam vertical intersection, forms angle measuring host computer's measuring arm with metal rubber spring bottom surface installation hole center line parallel.The metal rubber spring's different surface installation hole center line angle measuring mechanism, including positioning base, its characterized in that: still including along vertical fixed in positioning base's photoelectric measuring column and measuring arm 360 degrees rotatable angle measuring host computer, metal rubber spring is placed on positioning base, angle measuring host computer is placed on metal rubber spring and with metal rubber spring top surface installation hole positioning cooperation, photoelectric measuring column emits along vertical laser beam to positioning base, laser beam and metal rubber spring bottom surface installation hole center line vertically intersect on positioning base, angle measuring host computer's measuring arm rotates to with laser beam vertical intersection, forms angle measuring host computer's measuring arm with metal rubber spring bottom surface installation hole center line parallel.The metal rubber spring's different surface installation hole center line angle measuring mechanism, including positioning base, its characterized in that: still including along vertical fixed in positioning base's photoelectric measuring column and measuring arm 360 degrees rotatable angle measuring host computer, metal rubber spring is placed on positioning base, angle measuring host computer is placed on metal rubber spring and with metal rubber spring top surface installation hole positioning cooperation, photoelectric measuring column emits along vertical laser beam to positioning base, laser beam and metal rubber spring bottom surface installation hole center line vertically intersect on positioning base, angle measuring host computer's measuring arm rotates to with laser beam vertical intersection, forms angle measuring host computer's measuring arm with metal rubber spring bottom surface installation hole center line parallel.

Description

Technical Field

[0001] This invention relates to a mechanism and method for measuring the included angle of the center lines of the mounting holes of a metal rubber spring, belonging to the field of metal rubber spring installation technology. Background Technology

[0002] Primary conical rubber springs are used in the primary suspension systems of locomotives and rolling stock, primarily serving as vertical elastic supports and transmitting longitudinal traction or braking loads as well as providing lateral guidance. The product bears loads ranging from empty to maximum impact load, making it a key load-bearing component of the primary suspension system. In the primary suspension system of locomotives and rolling stock, primary conical rubber springs have two mounting holes on their bottom and top surfaces for installation and fixation. Whether the spatial position of these mounting holes meets the assembly requirements directly affects whether the product can be successfully assembled. Therefore, it is necessary to detect the angle between the centerline of the top mounting hole and the centerline of the bottom mounting hole of a series of tapered rubber springs to ensure that the installation requirements are met. However, since the centerlines of the top and bottom mounting holes are not on the same plane, they cannot be directly measured. Currently, a coordinate measuring machine or a special inspection tool is generally used to measure the angle. For example, CN202110805195.7 describes a method and tool for detecting the position of the threaded holes of a series of tapered rubber springs with different surfaces. A single-line laser lamp is installed on the mandrel, and a pass / fail judgment line is engraved under the rubber spring. The installation position of the unidirectional laser lamp is adjusted to correspond with the pass / fail judgment line. When the positional deviation between the upper and lower positioning threaded holes is within the acceptable range, the light from the unidirectional laser lamp falls within the pass / fail judgment line. The detection tool includes an upper detection body placed on the mandrel and a lower positioning base placed under the rubber spring. The unidirectional laser lamp is fixed on the upper detection body, and the pass / fail judgment line is engraved on the lower positioning base. However, due to the varying sizes and heights of the base plates of the tapered rubber springs and the different angles of the center lines of the mounting holes, the aforementioned testing tools can only manufacture one set of inspection tools for each type of tapered composite spring. Furthermore, they can only determine whether a product is qualified or unqualified, but cannot provide measurement data, resulting in high cost consumption and quality loss. Summary of the Invention

[0003] The present invention provides a measuring mechanism for the included angle of the centerlines of the non-planar mounting holes of metal rubber springs, enabling rapid measurement of this angle. It is adaptable to measuring metal rubber springs of different heights, bottom dimensions, and centerline angles. This allows a single measuring mechanism to accommodate various specifications of metal rubber springs, offering high practicality, reduced measurement costs, simple operation, high efficiency, high accuracy, and improved measurement quality. The present invention also provides a method for measuring the included angle of the centerlines of the non-planar mounting holes of metal rubber springs.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A mechanism for measuring the included angle of the center lines of the mounting holes on opposite sides of a metal rubber spring includes a positioning base that is positioned and engaged with the mounting hole on the bottom surface of the metal rubber spring and is horizontally arranged. The mechanism further includes a photoelectric measuring column and a measuring arm that can rotate 360 ​​degrees and are vertically fixed to the positioning base. The metal rubber spring is placed on the positioning base, and the angle measuring arm is placed on the metal rubber spring and positioned and engaged with the mounting hole on the top surface of the metal rubber spring. The photoelectric measuring column emits a vertical laser beam onto the positioning base. The laser beam intersects perpendicularly with the center line of the mounting hole on the bottom surface of the metal rubber spring on the positioning base. The measuring arm of the angle measuring arm rotates to intersect perpendicularly with the laser beam, thus making the measuring arm of the angle measuring arm parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring.

[0006] Preferably, the positioning base is fixed with positioning holes corresponding to the mounting holes on the bottom surface of the metal rubber spring. Bottom positioning pins that mate with the mounting holes on the bottom surface of the metal rubber spring are installed in the positioning holes. The bottom positioning pins extend into the mounting holes on the bottom surface of the metal rubber spring. There are multiple positioning holes that are aligned along the center line of the positioning holes. A light source calibration point aligned with the laser beam emitted from the photoelectric measuring column is provided on the positioning base. The light source calibration point is located on the center line of the positioning holes.

[0007] Preferably, the photoelectric measuring column includes a column shell vertically fixed on the positioning base and a photoelectric sensor mounted on the top of the column shell. The photoelectric sensor emits a vertical laser beam onto the positioning base, and the laser beam falls on the light source calibration point.

[0008] Preferably, the cylindrical shell is equipped with a measurement indicator light connected to the photoelectric sensor signal transmission, and the measurement indicator light changes color as the measuring arm of the angle measuring host intersects the laser beam perpendicularly.

[0009] Preferably, the angle measuring host includes a circular measuring base, a measuring arm rotatably mounted on the circular measuring base and arranged radially along the circular measuring base, a digital display angle meter mounted on the circular measuring base and rotating synchronously with the measuring arm, and a top surface positioning pin mounted on the bottom of the circular measuring base and positioned in conjunction with the mounting hole on the top surface of the metal rubber spring. The circular measuring base is placed on the metal rubber spring, the top surface positioning pin extends into the mounting hole on the top surface of the metal rubber spring, and the measuring arm can rotate on the circular measuring base to intersect the laser beam perpendicularly.

[0010] Preferably, the measuring arm includes an arm plate and a measuring pointer fixed to the front end of the arm plate. The arm plate is fixed to and rotatably mounted on a circular measuring base with a digital display angle meter. The measuring pointer comes into contact with the laser beam emitted by the photoelectric measuring column as the arm plate rotates, forming a perpendicular intersection between the measuring arm and the laser beam.

[0011] Preferably, a zeroing ruler is fixed on the circular measuring base. The zeroing ruler has a zeroing calibration end face that extends out of the circular measuring base. The zeroing calibration end face is set parallel to the center line of the top positioning pin. The diameter of the measuring pointer does not exceed 0.5 mm. The arm plate has a calibration side face that is parallel to the measuring pointer.

[0012] A method for measuring the included angle of the centerlines of the skew mounting holes of a metal rubber spring, using the aforementioned measuring mechanism for measuring the included angle of the centerlines of the skew mounting holes of a metal rubber spring, is characterized by comprising the following steps:

[0013] 1. Turn on the photoelectric measuring column and place the metal rubber spring on the positioning base. Confirm that the laser beam emitted by the photoelectric measuring column intersects perpendicularly with the center line of the mounting hole on the bottom surface of the metal rubber spring on the positioning base.

[0014] 2. After zeroing the angle measuring unit, place it on the metal rubber spring;

[0015] 3. Rotate the measuring arm of the main unit to intersect the laser beam perpendicularly;

[0016] 4. Read the angle measurement host and determine the angle between the center line of the top mounting hole and the center line of the bottom mounting hole of the metal rubber spring based on the reading.

[0017] Preferably, step one specifically refers to:

[0018] S1: Turn on the photoelectric measurement column and confirm that the laser beam emitted by the photoelectric measurement column falls on the light source calibration point;

[0019] S2: Adjust the spacing of the positioning pins on the bottom surface of the positioning base according to the spacing of the mounting holes on the bottom surface of the metal rubber spring;

[0020] S2: Place the metal rubber spring on the positioning base, and insert the bottom positioning pin into the mounting hole on the bottom surface of the metal rubber spring.

[0021] Preferably, step two specifically refers to:

[0022] First, place one side of the standard ruler against the zeroing standard end face;

[0023] Next, rotate the arm plate so that the calibration side of the arm plate aligns with the other straight surface of the standard ruler, forming a perpendicular alignment between the calibration side and the zeroing calibration end face, and then zero the reading of the digital angle meter.

[0024] Then, place the angle measuring unit on the metal rubber spring.

[0025] The beneficial effects of the invention are:

[0026] The present invention relates to a metal rubber spring centerline angle measuring mechanism for eccentric mounting holes. A positioning base is fitted with the bottom mounting hole of the metal rubber spring, and an angle measuring host is fitted with the top mounting hole of the metal rubber spring, forming a top-to-bottom sequential positioning fit between the positioning base, the metal rubber spring, and the angle measuring host. A laser beam emitted from the photoelectric measuring column towards the positioning base intersects perpendicularly with the centerline of the bottom mounting hole of the metal rubber spring. When the measuring arm of the angle measuring host rotates to a position perpendicular to the laser beam, the measuring arm of the angle measuring host becomes parallel to the centerline of the bottom mounting hole of the metal rubber spring. The vertical laser beam guides the rotation of the measuring arm of the angle measuring host, causing the angle measuring host to... The measuring arm is rotated until it is parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring. Before measurement, the zero point position of the measuring arm of the angle measuring host is determined. The angle between the center line of the mounting hole on the bottom surface and the center line of the mounting hole on the top surface of the metal rubber spring can be obtained from the measurement value of the angle measuring host. The measurement is highly accurate and can obtain a precise angle value. It can quickly measure the angle between the center lines of the mounting holes on opposite surfaces of the metal rubber spring. It is suitable for measuring metal rubber springs with different heights, different bottom surface sizes, and different angles between the center lines of the mounting holes on opposite surfaces. It can realize the measurement of multiple specifications of metal rubber springs with one measuring mechanism. It is highly practical, reduces measurement costs, is simple to operate, highly efficient, highly accurate, and improves measurement quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the centerline angle measuring mechanism for the metal rubber spring of the present invention.

[0028] Figure 2 This is a schematic diagram of a photoelectric measuring column fixed on a positioning base.

[0029] Figure 3 This is a schematic diagram of the angle measuring host. Detailed Implementation

[0030] The following is combined Figures 1-3 The embodiments of the present invention will be described in detail below.

[0031] A mechanism for measuring the included angle of the center lines of the mounting holes on opposite sides of a metal rubber spring includes a positioning base 1 that is positioned and engaged with the mounting hole on the bottom surface of the metal rubber spring and is horizontally arranged. The mechanism further includes a photoelectric measuring column 2 fixed vertically on the positioning base 1 and an angle measuring host 3 whose measuring arm can rotate 360 ​​degrees. The metal rubber spring is placed on the positioning base 1, and the angle measuring host 3 is placed on the metal rubber spring and positioned and engaged with the mounting hole on the top surface of the metal rubber spring. The photoelectric measuring column 2 emits a vertical laser beam onto the positioning base 1. The laser beam intersects perpendicularly with the center line of the mounting hole on the bottom surface of the metal rubber spring on the positioning base. The measuring arm of the angle measuring host 3 rotates to intersect perpendicularly with the laser beam, thus making the measuring arm of the angle measuring host 3 parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring.

[0032] The aforementioned metal-rubber spring centerline angle measuring mechanism for mounting holes on opposite sides comprises a positioning base 1 that is positioned and fitted with the mounting hole on the bottom surface of the metal-rubber spring, and an angle measuring host 3 that is positioned and fitted with the mounting hole on the top surface of the metal-rubber spring. This forms a top-to-bottom positioning arrangement of the positioning base 1, the metal-rubber spring, and the angle measuring host 3. A laser beam emitted from the photoelectric measuring column 2 towards the positioning base intersects perpendicularly with the centerline of the mounting hole on the bottom surface of the metal-rubber spring. When the measuring arm of the angle measuring host 3 rotates to a position perpendicular to the laser beam, the measuring arm of the angle measuring host 3 becomes parallel to the centerline of the mounting hole on the bottom surface of the metal-rubber spring. The vertical laser beam guides the rotation of the measuring arm of the angle measuring host, allowing the angle to be measured... The measuring arm of the main measuring unit is rotated until it is parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring. Before measurement, the zero point position of the measuring arm of the angle measuring main unit 3 is determined. The angle between the center line of the mounting hole on the bottom surface and the center line of the mounting hole on the top surface of the metal rubber spring can be obtained from the measurement value of the angle measuring main unit. The measurement is highly accurate and can obtain a precise angle value. It can quickly measure the angle between the center lines of the mounting holes on opposite surfaces of the metal rubber spring. It is suitable for measuring metal rubber springs with different heights, different bottom surface sizes, and different angles between the center lines of the mounting holes on opposite surfaces. It can realize the measurement of multiple specifications of metal rubber springs with one measuring mechanism. It is highly practical, reduces measurement costs, is simple to operate, highly efficient, highly accurate, and improves measurement quality.

[0033] The positioning base 1 has a positioning hole 11 that corresponds to the mounting hole on the bottom surface of the metal rubber spring. A bottom positioning pin 12 that mates with the mounting hole on the bottom surface of the metal rubber spring is installed in the positioning hole 11. The bottom positioning pin 12 extends into the mounting hole on the bottom surface of the metal rubber spring. There are multiple positioning holes 11 that are aligned along the center line of the positioning holes. A light source calibration point 3 that is aligned with the laser beam emitted from the photoelectric measuring column 2 is set on the positioning base 1. The light source calibration point 3 is located on the center line of the positioning hole. There are multiple positioning holes 11. The position of the bottom positioning pin 12 can be adjusted according to the spacing of the mounting holes on the bottom surface of the metal rubber spring, thus adapting to the measurement of metal rubber springs with different bottom surfaces and different mounting hole spacings. The light source calibration point 13 is aligned with the laser beam emitted by the angle measuring host 3. The landing point of the laser beam 3 on the positioning base 1 is the light source calibration point 13. The light source calibration point 13 is located on the center line of the positioning hole. The perpendicular intersection of the center line of the positioning hole and the laser beam 3 is the light source calibration point 13. The metal rubber spring is placed on the positioning base 1, and the bottom positioning pin 12 extends into the mounting hole on the bottom surface of the metal rubber spring, so that the metal rubber... The centerline of the mounting hole on the bottom surface of the spring coincides with the centerline of the positioning hole 11. The perpendicular intersection of the centerline of the mounting hole on the bottom surface of the metal rubber spring and the laser beam is the light source calibration point 13. When the measuring arm of the angle measuring host 3 rotates to perpendicularly intersect with the laser beam, the measuring arm of the angle measuring host 3 is parallel to the centerline of the mounting hole on the bottom surface of the metal rubber spring, and the angle measuring host 3 is positioned and matched with the mounting hole on the top surface of the metal rubber spring. Before measurement, the zero point position of the measuring arm of the angle measuring host 3 is specified, and the angle between the centerline of the mounting hole on the top surface of the metal rubber spring and the centerline of the mounting hole on the bottom surface of the metal rubber spring can be obtained according to the measurement value of the angle measuring host 3.

[0034] The photoelectric measuring column 2 includes a column housing 21 vertically fixed on the positioning base 1 and a photoelectric sensor 22 mounted on the top of the column housing 21. The photoelectric sensor 22 emits a vertical laser beam onto the positioning base 1, and the laser beam falls on the light source calibration point 13. The laser beam from the photoelectric sensor 22 falls on the light source calibration point 13, and the photoelectric sensor 22 can sense the measuring arm of the angle measuring host 3. When the measuring arm of the angle measuring host 3 contacts the laser beam, the photoelectric sensor 22 will emit a contact signal. By connecting the photoelectric sensor 22 to the controller or indicator light signal transmission, it can be determined by the signal received by the controller or the indication of the indicator light that the measuring arm of the angle measuring host 3 is perpendicularly intersecting the laser beam. At this time, the measuring arm of the angle measuring host 3 is parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring.

[0035] The cylindrical housing 21 is equipped with a measurement indicator light 23 connected to the photoelectric sensor 22 for signal transmission. The measurement indicator light 23 changes color as the measuring arm of the angle measuring host 3 intersects the laser beam perpendicularly. The color change of the measurement indicator light 23 indicates that the measuring arm of the angle measuring host 3 has rotated to intersect the laser beam perpendicularly, at which point the measuring arm of the angle measuring host 3 is parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring.

[0036] The angle measuring host 3 includes a circular measuring base 31, a measuring arm 32 rotatably mounted on the circular measuring base and arranged radially along the circular measuring base, a digital display angle meter 33 mounted on the circular measuring base 31 and rotating synchronously with the measuring arm 32, and a top surface positioning pin 30 mounted on the bottom of the circular measuring base 31 and positioned in conjunction with the mounting hole on the top surface of the metal rubber spring. The circular measuring base 31 is placed on the metal rubber spring, and the top surface positioning pin 30 extends into the mounting hole on the top surface of the metal rubber spring. The measuring arm 32 can rotate on the circular measuring base to intersect the laser beam perpendicularly. The measuring arm 32 is arranged radially along the circular measuring base. When the angle measuring host 3 is placed on the metal rubber spring, the measuring arm 32 is horizontally positioned. The measuring arm 32 rotates on the circular measuring base 31. When the measuring arm 32 comes into contact with the laser beam, it means that the measuring arm 32 has rotated to intersect the laser beam perpendicularly. At this time, the measuring arm 32 is parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring.

[0037] The measuring arm 32 includes an arm plate 34 and a measuring pointer 35 fixed to the front end of the arm plate 34. The arm plate 34 is fixed to and rotatably mounted on a circular measuring base 31 with a digital angle meter 33. As the arm plate 34 rotates, the measuring pointer 35 comes into contact with the laser beam emitted from the photoelectric measuring column 2, forming a perpendicular intersection between the measuring arm and the laser beam. When the measuring pointer 35 contacts the laser beam, it is perpendicular to the laser beam, forming a perpendicular intersection between the measuring arm and the laser beam. The small diameter of the measuring pointer 35 effectively reduces measurement errors.

[0038] The circular measuring base 31 is fixed with a zeroing ruler 36, which has a zeroing calibration end face 361 extending out of the circular measuring base 31. The zeroing calibration end face 361 is set parallel to the center line of the top positioning pin 30. The diameter of the measuring pointer 35 does not exceed 0.5mm, which can effectively reduce the measurement error. The arm plate 34 has a calibration side 341 parallel to the measuring pointer 35. The zeroing calibration end face 361 is set parallel to the center line of the top surface positioning pin 30. When the angle measuring host 3 is placed on the metal rubber spring and the top surface positioning pin 30 is inserted into the mounting hole on the top surface of the metal rubber spring, the zeroing calibration end face 361 will be parallel to the center line of the mounting hole on the top surface of the metal rubber spring. The calibration side face 341 is used to calibrate the zero point position of the measuring arm of the angle measuring host 3. For convenient calibration, it can be specified that when the calibration side face 341 is set perpendicular to the zeroing calibration end face 361 at 90 degrees, it is the zero point position of the measuring arm of the angle measuring host 3, that is, the zero point position of the measuring arm of the angle measuring host 3 is perpendicular to the center line of the mounting hole on the top surface of the metal rubber spring. At this time, the measuring pointer 35 is set perpendicular to the zeroing calibration end face 361. The angle measuring host is placed... After rotating the arm plate 34 on the metal rubber spring, the pointer 35 comes into contact with the laser beam. The photoelectric sensor detects the pointer 35 and the measuring indicator light 23 changes color, indicating that the measuring arm of the angle measuring host 3 has rotated to a position that is perpendicular to the laser beam and parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring. Based on the reading of the digital angle meter 33 and the setting that the zero point of the measuring arm of the angle measuring host 3 is perpendicular to the center line of the mounting hole on the top surface of the metal rubber spring, the angle between the center line of the mounting hole on the top surface of the metal rubber spring and the center line of the mounting hole on the bottom surface can be calculated. In order to obtain the angle quickly and easily, the digital angle meter 33 can be connected to the controller, and the reading of the digital angle meter 33 can be directly transmitted to the controller so that the controller can directly calculate the angle.

[0039] A method for measuring the included angle of the centerlines of the skew mounting holes of a metal rubber spring, using the aforementioned measuring mechanism for measuring the included angle of the centerlines of the skew mounting holes of a metal rubber spring, is characterized by comprising the following steps:

[0040] 1. Turn on the photoelectric measuring column 2 and place the metal rubber spring on the positioning base 1. Confirm that the laser beam emitted by the photoelectric measuring column 2 intersects perpendicularly with the center line of the mounting hole on the bottom surface of the metal rubber spring on the positioning base 1.

[0041] 2. After zeroing the angle measuring host 3, place it on the metal rubber spring;

[0042] 3. The measuring arm of the rotation angle measuring host 3 is aligned with the laser beam perpendicularly;

[0043] 4. Read the angle measurement host 3 and determine the angle between the center line of the top mounting hole and the center line of the bottom mounting hole of the metal rubber spring based on the reading.

[0044] The above-described method for measuring the included angle of the center lines of the non-planar mounting holes of metal rubber springs offers high accuracy, providing precise angle values ​​and enabling rapid measurement of the included angle of the center lines of the non-planar mounting holes. It is suitable for measuring metal rubber springs of different heights, bottom dimensions, and included angles of the center lines of the non-planar mounting holes. A single measuring mechanism can be used to measure various specifications of metal rubber springs, offering high practicality, reduced measurement costs, simple operation, high efficiency, high accuracy, and improved measurement quality.

[0045] Specifically, step one refers to:

[0046] S1: Turn on photoelectric measurement column 2 and confirm that the laser beam emitted from photoelectric measurement column 2 falls on the light source calibration point 13;

[0047] S2: Adjust the spacing of the positioning pins 12 on the bottom surface of the positioning base 1 according to the spacing of the mounting holes on the bottom surface of the metal rubber spring;

[0048] S3: Place the metal rubber spring on the positioning base 1, and insert the bottom positioning pin 12 into the mounting hole on the bottom surface of the metal rubber spring.

[0049] First, turn on the photoelectric sensor to emit a laser beam, then confirm that the laser beam falls on the light source calibration point 13. After that, place the metal rubber spring on the positioning base 1, so that the center line of the mounting hole on the bottom surface of the metal rubber spring is aligned with the light source calibration point 13, ensuring that the center line of the mounting hole on the bottom surface of the metal rubber spring intersects the laser beam perpendicularly at the light source calibration point 13, thus ensuring measurement reliability.

[0050] Step two specifically refers to:

[0051] First, place one side of the standard ruler against the zeroing standard end face 361;

[0052] Next, rotate the arm plate 35 so that the calibration side 341 of the arm plate 34 abuts against the other straight surface of the standard straight ruler, forming the perpendicularity between the calibration side 341 and the zeroing calibration end face 361, and then zero the reading of the digital display angle meter 33.

[0053] Then, place the angle measuring host 3 on the metal rubber spring.

[0054] The zero point position of the measuring arm of the measuring host 3 is calibrated using a standard ruler. After calibration, the reading of the digital angle meter 33 is zeroed. This is equivalent to specifying that the zero point position of the measuring arm of the angle measuring host 3 is when the calibration side 341 is set perpendicular to the zeroing calibration end face 361 at 90 degrees. That is, the zero point position of the measuring arm of the angle measuring host is perpendicular to the center line of the mounting hole on the top surface of the metal rubber spring. At this time, the measuring pointer 35 is set perpendicular to the zeroing calibration end face 361. After placing the angle measuring host on the metal rubber spring, the arm plate 34 is rotated to make the pointer 35 contact the laser beam. The photoelectric sensor senses the pointer 35 and causes the measuring indicator light 23 to change color, indicating that the measuring arm of the angle measuring host 3 has rotated to a position that is perpendicular to the laser beam and parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring. Based on the reading of the digital angle meter 33 and the setting that the zero point position of the measuring arm of the angle measuring host 3 is perpendicular to the center line of the mounting hole on the top surface of the metal rubber spring, the angle between the center line of the mounting hole on the top surface of the metal rubber spring and the center line of the mounting hole on the bottom surface can be calculated.

[0055] The technical solutions of the embodiments of the present invention have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A mechanism for measuring the included angle of the center lines of the mounting holes on opposite sides of a metal rubber spring, comprising a positioning base that is positioned and fitted with the mounting holes on the bottom surface of the metal rubber spring and is horizontally arranged, characterized in that: It also includes a photoelectric measuring column and a measuring arm that can rotate 360 ​​degrees, which are fixed vertically on the positioning base. The metal rubber spring is placed on the positioning base, and the angle measuring host is placed on the metal rubber spring and positioned and matched with the mounting hole on the top surface of the metal rubber spring. The photoelectric measuring column emits a vertical laser beam onto the positioning base. The laser beam intersects perpendicularly with the center line of the mounting hole on the bottom surface of the metal rubber spring on the positioning base. The measuring arm of the angle measuring host rotates to intersect perpendicularly with the laser beam, so that the measuring arm of the angle measuring host is parallel to the center line of the mounting hole on the bottom surface of the metal rubber spring. The positioning base is fixed with positioning holes corresponding to the mounting holes on the bottom surface of the metal rubber spring. A bottom positioning pin that mates with the mounting holes on the bottom surface of the metal rubber spring is installed in the positioning hole. The bottom positioning pin extends into the mounting hole on the bottom surface of the metal rubber spring. There are multiple positioning holes that are aligned along the center line of the positioning holes. The positioning base is provided with a light source calibration point that is aligned with the laser beam emitted from the photoelectric measuring column. The light source calibration point is located on the center line of the positioning hole. The photoelectric measuring column includes a column shell vertically fixed on the positioning base and a photoelectric sensor mounted on the top of the column shell. The photoelectric sensor emits a vertical laser beam onto the positioning base, and the laser beam falls on the light source calibration point. The angle measuring host includes a circular measuring base, a rotatable measuring arm mounted on the circular measuring base and arranged radially along the circular measuring base, a digital display angle meter mounted on the circular measuring base and rotating synchronously with the measuring arm, and a top surface positioning pin mounted on the bottom of the circular measuring base and positioned in conjunction with the mounting hole on the top surface of the metal rubber spring. The circular measuring base is placed on the metal rubber spring, and the top surface positioning pin extends into the mounting hole on the top surface of the metal rubber spring. The measuring arm can rotate on the circular measuring base to intersect the laser beam perpendicularly. The measuring arm includes an arm plate and a measuring pointer fixed to the front end of the arm plate. The arm plate is fixed to and rotatably mounted on a circular measuring base with a digital display angle meter. As the arm plate rotates, the measuring pointer comes into contact with the laser beam emitted from the photoelectric measuring column, forming a perpendicular intersection between the measuring arm and the laser beam.

2. The metal rubber spring centerline angle measuring mechanism according to claim 1, characterized in that: The cylindrical shell is equipped with a measurement indicator light connected to the photoelectric sensor signal transmission. The measurement indicator light changes color when the measuring arm of the angle measuring host intersects the laser beam perpendicularly.

3. The metal rubber spring centerline angle measuring mechanism according to claim 1, characterized in that: A zeroing ruler is fixed on the circular measuring base. The zeroing ruler has a zeroing calibration end face that extends out of the circular measuring base. The zeroing calibration end face is set parallel to the center line of the top positioning pin. The diameter of the measuring pointer does not exceed 0.5 mm. The arm plate has a calibration side face that is parallel to the measuring pointer.

4. A method for measuring the included angle of the centerlines of the skew mounting holes of a metal rubber spring, wherein the measuring mechanism for measuring the included angle of the centerlines of the skew mounting holes of a metal rubber spring as described in any one of claims 1 to 3 is used for testing, characterized in that... Includes the following steps:

1. Turn on the photoelectric measuring column and place the metal rubber spring on the positioning base. Confirm that the laser beam emitted by the photoelectric measuring column intersects perpendicularly with the center line of the mounting hole on the bottom surface of the metal rubber spring on the positioning base.

2. After zeroing the angle measuring unit, place it on the metal rubber spring; 3. Rotate the measuring arm of the main unit to intersect the laser beam perpendicularly; 4. Read the angle measurement host and determine the angle between the center line of the top mounting hole and the center line of the bottom mounting hole of the metal rubber spring based on the reading.

5. The method for measuring the included angle of the center lines of the skew mounting holes of a metal-rubber spring according to claim 4, characterized in that, Step one specifically refers to: S1: Turn on the photoelectric measurement column and confirm that the laser beam emitted by the photoelectric measurement column falls on the light source calibration point; S2: Adjust the spacing of the positioning pins on the bottom surface of the positioning base according to the spacing of the mounting holes on the bottom surface of the metal rubber spring; S3: Place the metal rubber spring on the positioning base, and insert the bottom positioning pin into the mounting hole on the bottom surface of the metal rubber spring.

6. The method for measuring the included angle of the center lines of the skew mounting holes of a metal-rubber spring according to claim 4, characterized in that, Step two specifically refers to: First, place one side of the standard ruler against the zeroing standard end face; Next, rotate the arm plate so that the calibration side of the arm plate aligns with the other straight surface of the standard ruler, forming a perpendicular alignment between the calibration side and the zeroing calibration end face, and then zero the reading of the digital angle meter. Then, place the angle measuring unit on the metal rubber spring.

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