Multifunctional measuring scale

Abstract

The utility model relates to the technical field of measurement and detection, in particular to a multifunctional measuring scale. The measuring scale comprises a main scale and a movable scale, the movable scale is installed on the main scale in a sliding mode, a reset spring is arranged between the movable scale and the main scale, one end of the reset spring is connected with the main scale through a bolt, the other end of the reset spring is connected with the movable scale through a bolt, and the main scale is provided with a digital display meter and a locking knob used for tightly abutting against the movable scale. The front end of the main ruler is detachably provided with a reference piece or a gap depth measuring head, the movable ruler is provided with a capacitive grating sensor corresponding to a digital display meter, the front end of the movable ruler is provided with an installation hole used for installing a measuring piece or a gap depth reference plate, and the end portion of the front end of the movable ruler is provided with a narrow plate used for measurement. The two end faces of the narrow plate are perpendicular to the movable ruler. According to the utility model, the measurement of different data can be satisfied by configuring different reference pieces and measuring pieces, the reset spring is arranged between the main ruler and the movable ruler, the movable ruler can be automatically reset, the operation is convenient and fast, and the structure is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement and detection, in particular to a multifunctional measuring ruler. Background Art

[0002] Elevators and escalators are both common means of transportation in people's daily lives. They are fast, convenient, time-saving, and labor-saving, and are widely used in multi-story and high-rise buildings. To ensure the normal operation and safety of elevators and escalators, maintenance and servicing are particularly important. During the installation and maintenance process, elevators encounter various dimensional measurements, such as the meshing depth of the comb plates, the gap between the protective baffle and the steps, the gap depth, the wire rope diameter, and the wear of the traction sheave groove. Traditionally, inspectors use different measuring tools, such as tape measures, calipers, and feeler gauges, to measure various parameters. This method requires numerous measuring tools, making it inconvenient to carry them on-site for measurement, and results in relatively low inspection efficiency. Consequently, measuring rulers that integrate multiple measurement functions have emerged on the market.

[0003] Chinese patent application number 201910667892.3 discloses a multifunctional measuring ruler comprising a ruler body, a movable ruler, a measuring section, and multiple replaceable measuring heads. Each measuring head has two reference posts at its measuring end, and one of the measuring heads has a third reference plate for measurement reference. By configuring the replaceable measuring heads, the appropriate measuring head can be selected based on the measurement requirements to achieve the purpose of measuring different data. For example, when measuring the relative wear between the rope grooves of a traction sheave, a measuring head with a cylindrical reference post structure is selected. A reference post measuring head with a corresponding diameter is selected based on the specifications of the traction sheave itself. When measuring the engagement and clearance between the comb plate and steps of an escalator, a measuring head with a third reference plate is selected. This measuring ruler is highly adaptable and versatile, meeting a variety of measurement needs. However, its movable ruler slides with the ruler body via a slide groove and friction plate. After each measurement, the movable ruler needs to be manually adjusted for re-measurement, which is cumbersome and affects measurement efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problem that in the measurement process of the existing multifunctional measuring ruler, the position of the movable ruler needs to be adjusted frequently manually, which is cumbersome and affects the measurement efficiency. The utility model provides a multifunctional measuring ruler. By configuring different reference parts and measuring parts, it can meet the measurement needs of special equipment such as elevators and escalators. A reset spring is provided between the main scale and the movable scale, so that the movable scale can reset itself after measurement, and there is no need to manually adjust the position of the movable scale. The operation is more convenient and quick. The utility model has the characteristics of simple structure, compact appearance, easy to carry, high measurement accuracy, good practicality, strong versatility, etc.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a multifunctional measuring ruler, comprising a main ruler and a movable ruler, the movable ruler being slidably mounted on the main ruler, a return spring being arranged between the movable ruler and the main ruler, one end of the return spring being connected to the main ruler by a bolt, and the other end of the return spring being connected to the movable ruler by a bolt, the main ruler being provided with a digital display and a locking knob for tightening the movable ruler, a reference piece or a gap depth measuring head being detachably mounted on the front end of the main ruler, a capacitive grating sensor corresponding to the digital display being provided on the movable ruler, a mounting hole being provided at the front end of the movable ruler for mounting a measuring piece or a gap depth reference plate, a narrow plate being provided at the end of the front end of the movable ruler for measurement, and both end surfaces of the narrow plate being respectively arranged perpendicular to the movable ruler.

[0006] Furthermore, the movable ruler is slidably installed on one side of the main ruler, and a fixed block is installed on the other side of the main ruler through bolts. A sliding block is slidably installed on the fixed block, and the rear end of the sliding block is connected to the rear end of the movable ruler through bolts. A handle is provided at the front end of the sliding block.

[0007] Furthermore, the reference member includes a first reference plate, which has an L-shaped structure. One end of the first reference plate is installed on the front end of the main scale by bolts, and the other end of the first reference plate is provided with two stepped platforms, and the two stepped platforms are arranged toward the rear end of the main scale.

[0008] Furthermore, the two-step platform includes a first step platform and a second step platform, the thickness of the first step platform is 1 mm, and the thickness of the second step platform is 2 mm.

[0009] Furthermore, the measuring part includes a measuring plate, which has an L-shaped structure. One end of the measuring plate is installed on the front end of the moving ruler by bolts, and the other end of the measuring plate is arranged opposite to the other end of the first reference plate, and the end of the end is provided with a three-step platform, and the three-step platform is arranged toward the front end of the moving ruler.

[0010] Furthermore, the three-step platform includes a third step platform, a fourth step platform and a fifth step platform, the thickness of the third step platform is 1 mm, the thickness of the fourth step platform is 2 mm, and the thickness of the fifth step platform is 3 mm.

[0011] Furthermore, the reference part includes a second reference plate, which has a T-shaped structure. One end of the second reference plate is mounted on the front end of the main scale by bolts, and the end face of the other end of the second reference plate is perpendicular to the main scale. The measuring part includes a wheel groove wear measuring head, one end of the wheel groove wear measuring head is mounted on the front end of the movable scale by bolts, and the other end of the wheel groove wear measuring head is a cylinder, and a groove is provided on the outer wall of the cylinder away from one end of the movable scale.

[0012] Furthermore, there are five wheel groove wear measuring heads, and the diameters of the cylinders of the five wheel groove wear measuring heads are 8 mm, 10 mm, 12 mm, 13 mm and 16 mm respectively.

[0013] Furthermore, one end of the gap depth measuring head is installed on the front end of the main scale by a bolt, and the other end of the gap depth measuring head is an isosceles right triangle structure. One right-angled side of the isosceles right triangle structure is perpendicular to the main scale, and the other right-angled side of the isosceles right triangle structure is parallel to the main scale. The hypotenuse of the isosceles right triangle structure is set toward the movable scale, and scales are provided on both side surfaces of the isosceles right triangle structure, and the scales are located at the hypotenuse position of the isosceles right triangle structure.

[0014] Furthermore, the gap depth reference plate has an L-shaped structure, one end of the gap depth reference plate is installed on the front end of the movable ruler by a bolt, the other end of the gap depth reference plate is arranged back to the gap depth measuring head, and the end of this end is provided with a three-step platform, and the three-step platform is arranged toward the front end of the movable ruler.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] (1) The utility model has a multifunctional measuring ruler, and the front ends of the main ruler and the movable ruler are equipped with a variety of replaceable reference parts or measuring parts. The corresponding reference parts and measuring parts can be selected according to the measurement requirements to measure special equipment such as elevators and escalators, thereby ensuring the normal operation of the equipment. A reset spring is provided between the main ruler and the movable ruler, so that the movable ruler can reset itself after measurement, and there is no need to manually adjust the position of the movable ruler. It is particularly suitable for situations where multiple measurements are required, and the operation is more convenient and quick. It has the characteristics of simple structure, compact appearance, easy to carry, and high measurement accuracy.

[0017] (2) The utility model has a multifunctional measuring ruler, in which the movable ruler can be driven to slide by a sliding block provided on one side of the main ruler. The sliding block is provided with a handle, which can facilitate the operation of sliding the movable ruler along the main ruler to adjust its measuring position. At the same time, the locking knob can be used to fix the position of the movable ruler, making it easier to measure.

[0018] (3) The multifunctional measuring ruler of the utility model can measure the meshing size between the comb plate and the steps of the escalator through the cooperation of the first reference plate and the narrow plate, can measure the gap between the protective baffle and the steps and the diameter of the wire rope through the cooperation of the first reference plate and the measuring plate, can measure the wear of the traction wheel groove through the cooperation of the second reference plate and the wheel groove wear measuring head, and is equipped with a plurality of wheel groove wear measuring heads of different diameters to meet the measurement of traction wheel grooves of different sizes. The gap depth can be measured through the cooperation of the gap depth measuring head and the narrow plate, and the gap depth measuring head and the gap depth reference plate. The gap depth reference plate can increase the measuring area and has higher measurement stability. The measuring ruler has good practicality, strong versatility and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the multifunctional measuring ruler of embodiment 1 of the utility model Figure 1 .

[0020] Figure 2 The structure of the multifunctional measuring ruler of embodiment 1 of the utility model Figure 2 .

[0021] Figure 3 This is a diagram of the internal structure of the multifunctional measuring ruler according to Example 1 of the present utility model.

[0022] Figure 4 This is a structural diagram of a multifunctional measuring ruler according to embodiment 2 of the present utility model.

[0023] Figure 5 This is a schematic structural diagram of the contact between the first reference plate and the measuring plate of the multifunctional measuring ruler in Example 2 of the present utility model.

[0024] Figure 6 This is a structural diagram of a multifunctional measuring ruler according to embodiment 3 of the present utility model.

[0025] Figure 7 This is a structural diagram of the wheel groove wear measuring heads of different sizes in the multifunctional measuring ruler of Example 3 of the utility model.

[0026] Figure 8 This is a structural diagram of a multifunctional measuring ruler according to embodiment 4 of the present utility model.

[0027] Figure 9 This is a structural diagram of a multifunctional measuring ruler according to embodiment 5 of the present utility model.

[0028] In the figure: 1. Main scale, 2. Moving scale, 21. Mounting hole, 3. Digital display, 31. On / off switch, 32. Unit conversion key, 33. Hold key, 34. Zero key, 4. Locking knob, 5. Capacitive sensor, 6. Narrow plate, 7. Fixed block, 8. Sliding block, 9. Handle, 10. Return spring, 11. Bolt, 12. First reference plate, 121. First step platform, 122. Second step platform, 13. Measuring plate, 131. Third step platform, 132. Fourth step platform, 133. Fifth step platform, 14. Second reference plate, 15. Wheel groove wear measuring head, 151. Groove, 16. Gap depth measuring head, 17. Gap depth reference plate. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the specific embodiments.

[0030] Example 1

[0031] like Figure 1-3 The multifunctional measuring ruler shown in the figure comprises a main ruler 1 and a movable ruler 2, the movable ruler 2 being slidably mounted on the main ruler 1, a return spring 10 being provided between the movable ruler 2 and the main ruler 1, one end of the return spring 10 being connected to the main ruler 1 by a bolt 11, and the other end of the return spring 10 being connected to the movable ruler 2 by a bolt 11, a digital display 3 and a locking knob 4 for tightening the movable ruler are provided on the main ruler 1, an on / off key 31, a unit conversion key 32, a hold key 33 and a zero key 34 are provided on the digital display 3, the measuring ruler has automatic and manual power-off functions, and can be turned off at any position. The metric and imperial units can be converted and zeroed at any position, which is convenient for conversion between relative measurement and absolute measurement. The front end of the main scale 1 is detachably mounted with a reference piece or a gap depth measuring head 16, and the movable scale 2 is provided with a capacitive grating sensor 5 corresponding to the digital display 3. The fixed grating of the capacitive grating sensor 5 is fixed on the digital display 3, and the movable grating of the capacitive grating sensor 5 is fixed on the movable scale 2. The front end of the movable scale 2 is provided with a mounting hole 21 for mounting a measuring piece, and the end portion of the front end of the movable scale 2 is provided with a narrow plate 6 for measurement, and the two end faces of the narrow plate 6 are respectively arranged perpendicular to the movable scale 2.

[0032] Preferably, the movable ruler 2 is slidably mounted on one side of the main ruler 1, and a fixed block 7 is installed on the other side of the main ruler 1 by bolts. A sliding block 8 is slidably mounted on the fixed block 7. The rear end of the sliding block 8 is connected to the rear end of the movable ruler 2 by bolts, and a handle 9 is provided at the front end of the sliding block 8. The movable ruler 2 can be driven to slide by the sliding block 8 set on one side of the main ruler 1. The handle 9 is provided on the sliding block 8, which can facilitate the operation of the movable ruler 2 to slide along the main ruler 1 to adjust its measuring position. At the same time, in conjunction with the locking knob 4, the position of the movable ruler 2 can be fixed, which is convenient for measurement.

[0033] In this embodiment, the reference member installed at the front end of the main scale 1 is a first reference plate 12. The first reference plate 12 has an L-shaped structure. One end of the first reference plate 12 is installed at the front end of the main scale 1 by bolts, and the other end of the first reference plate 12 is provided with two stepped platforms, and the two stepped platforms are arranged toward the rear end of the main scale 1. The two stepped platforms include a first stepped platform 121 and a second stepped platform 122. The thickness of the first stepped platform 121 is 1 mm, and the thickness of the second stepped platform 122 is 2 mm.

[0034] The process of measuring the engagement size between the comb plate and the step of an escalator is as follows: press the power button 31 to turn on the power, press the unit conversion button 32 to select the desired single-stand system, place the end face of the narrow plate 6 away from the end of the moving ruler 2 and the reference surface of the first reference plate 12 away from the end of the main ruler 1 on the same horizontal plane, and then press the zero key 34 to reset to zero. The thickness of the narrow plate 6 is 1 mm. Place the reference surface of the first reference plate 12 away from the end of the main ruler 1 on the step, and place the narrow plate 6 under the comb plate. Move the narrow plate 6 so that the end face of the narrow plate 6 close to the end of the moving ruler 2 contacts the bottom of the comb plate, read the reading of the digital display 3, and this reading minus 1 mm is the engagement size between the comb plate and the step of the escalator.

[0035] Example 2

[0036] like Figure 4-5 As shown, the multifunctional measuring ruler of this embodiment is basically the same as that of Example 1, except that a measuring plate 13 is installed at the mounting hole 21 at the front end of the movable ruler 2. The measuring plate 13 has an L-shaped structure, and one end of the measuring plate 13 is mounted on the front end of the movable ruler 2 by a bolt. The other end of the measuring plate 13 is arranged opposite to the other end of the first reference plate 12, and the end of the end is provided with a three-step platform, and the three-step platform is arranged toward the front end of the movable ruler 2. The three-step platform includes a third step platform 131, a fourth step platform 132 and a fifth step platform 133. The thickness of the third step platform 131 is 1 mm, the thickness of the fourth step platform 132 is 2 mm, and the thickness of the fifth step platform 133 is 3 mm.

[0037] The process of measuring the gap between the protective baffle and the step is as follows: after the first reference plate 12 and the measuring plate 13 are in contact with each other, press the zero key 34 to set zero, then place the first reference plate 12 and the measuring plate 13 between the gap to be measured, so that the steps of the first reference plate 12 and the measuring plate 13 that are separated from each other are respectively in contact with the two sides of the gap, read the readings, and according to the size of the spacing of the measuring gap, adaptively select the coordination of the first step 121, the second step 122 and the third step 131, the fourth step 132 and the fifth step 133. When measuring by combining the first step platform 121 with the third step platform 131, the reading plus 2mm is the measured gap size; when measuring by combining the second step platform 122 with the third step platform 131, the reading plus 3mm is the measured gap size; when measuring by combining the second step platform 122 with the fourth step platform 132, the reading plus 4mm is the measured gap size; when measuring by combining the second step platform 122 with the fifth step platform 133, the reading plus 5mm is the measured gap size.

[0038] The process of measuring the diameter of the wire rope is: after the first reference plate 12 and the measuring plate 13 are in contact with each other, press the zero key 34 to set zero, place the wire rope to be measured between the first reference plate 12 and the measuring plate 13, and read the reading as the diameter of the wire rope.

[0039] Example 3

[0040] like Figure 6 As shown, the multifunctional measuring ruler of this embodiment is basically the same as that of embodiment 1, except that the reference member installed at the front end of the main ruler 1 is a second reference plate 14, and a wheel groove wear measuring head 15 is installed at the mounting hole 21 at the front end of the movable ruler 2.

[0041] The second reference plate 14 has a T-shaped structure. One end of the second reference plate 14 is mounted on the front end of the main scale 1 by means of bolts, and the end surface of the other end of the second reference plate 14 is perpendicular to the main scale 1 .

[0042] One end of the wheel groove wear measuring head 15 is mounted on the front end of the movable ruler 2 by means of bolts. The other end of the wheel groove wear measuring head 15 is a cylinder. A groove 151 is provided on the outer wall of the cylinder away from one end of the movable ruler. When the wheel groove wear measuring head 15 is placed in the wheel groove, the groove 151 is perpendicular to the two side walls of the wheel groove. During the measurement process, the wheel groove wear measuring head 15 can contact the bottom of the wheel groove through the fulcrums on both sides of the groove 151, thereby ensuring that the wheel groove wear measuring head 15 does not shake during measurement, thereby improving the measurement stability and thus improving the measurement accuracy.

[0043] like Figure 7As shown, there are five wheel groove wear measuring heads 15, and the diameters of the cylinders of the five wheel groove wear measuring heads 15 are 8 mm, 10 mm, 12 mm, 13 mm and 16 mm respectively. By providing multiple wheel groove wear measuring heads 15, a wheel groove wear measuring head 15 of corresponding diameter can be selected according to the size of the traction sheave groove to measure the wheel groove wear amount.

[0044] The process of measuring the wear of the traction sheave groove is as follows: the second reference plate 14 is installed on the front end of the main scale 1 by bolts, a groove wear measuring head 15 of corresponding size is selected according to the size of the traction sheave groove, and it is installed on the front end of the movable scale 2 by bolts, and then the measuring head is placed in the first groove, and the movable scale 2 is slid to drive the end face of the second reference plate 14 away from one end of the main scale 1 to contact the outer edge of the traction sheave groove. When the groove wear measuring head 15 contacts the groove measuring surface, press the zero key 34 to zero. At this time, the first groove is the reference standard, and the movable scale 2 is released. At this time, the movable scale 2 will automatically reset under the action of the reset spring 10. Then the groove wear measuring head 15 is placed on the second groove for measurement, and the value relative to the wear of the first groove is recorded. Similarly, the remaining grooves are measured in turn according to the above steps, and the values on the digital display 3 are recorded. The recorded values are the wear of the groove relative to the first groove.

[0045] Example 4

[0046] like Figure 8 As shown, the multifunctional measuring ruler of this embodiment is basically the same as that of Example 1, except that a gap depth measuring head 16 is installed at the front end of the main ruler 1, one end of the gap depth measuring head 16 is installed at the front end of the main ruler 1 by a bolt, and the other end of the gap depth measuring head 16 is an isosceles right triangle structure, one right-angled side of the isosceles right triangle structure is perpendicular to the main ruler 1, the other right-angled side of the isosceles right triangle structure is parallel to the main ruler 1, the hypotenuse of the isosceles right triangle structure is arranged toward the movable ruler 2, and scales are provided on both sides of the isosceles right triangle structure (not shown in the figure), and the scales are located at the hypotenuse of the isosceles right triangle structure.

[0047] The process of measuring the gap depth is: slide the movable ruler 2, place the end face of the narrow plate 6 away from the movable ruler 2 and the end of the gap depth measuring head 16 away from the main ruler 1 on the same horizontal plane, then press the zero key 34 to set zero, then place the end face of the narrow plate 6 away from the movable ruler 2 on a horizontal plane, slide the movable ruler 2 to allow the gap depth measuring head 16 to extend into the gap, and read the value when the end of the gap depth measuring head 16 away from the main ruler 1 contacts the bottom of the gap, which is the gap depth.

[0048] Example 5

[0049] like Figure 9As shown, the multifunctional measuring ruler of this embodiment is basically the same as that of Example 4, except that a gap depth reference plate 17 is installed at the front end of the movable ruler 2 by bolts, and the gap depth reference plate 17 is an L-shaped structure. One end of the gap depth reference plate 17 is installed at the front end of the movable ruler 2 by bolts, and the other end of the gap depth reference plate 17 is arranged back to the gap depth measuring head 16, and the end of this end is provided with a three-step platform, which is arranged toward the front end of the movable ruler 2. Specifically, the structure of the gap depth reference plate 17 is the same as that of the measuring plate 13.

[0050] The process of measuring the gap depth is: slide the movable ruler 2, place the gap depth reference plate 17 away from the stepped platform at one end of the movable ruler 2 and the end of the gap depth measuring head 16 away from one end of the main ruler 1 on the same horizontal plane, then press the zero key 34 to reset to zero, and then place the stepped platform of the gap depth reference plate 17 away from one end of the movable ruler 2 on a horizontal plane, slide the movable ruler 2 so that the gap depth measuring head 16 extends into the gap, and when the end of the gap depth measuring head 16 away from one end of the main ruler contacts the bottom of the gap, the value is read, which is the gap depth. In this embodiment, by installing the gap depth reference plate 17 at the front end of the movable ruler 2, the contact area between the reference end and the horizontal plane can be increased, making the measurement process more stable and improving the measurement accuracy.

[0051] The utility model discloses a multifunctional measuring ruler. The front ends of the main ruler and the movable ruler are provided with a variety of replaceable reference parts or measuring parts. The corresponding reference parts and measuring parts can be selected according to the measurement requirements to measure special equipment such as elevators and escalators, thereby ensuring the normal operation of the equipment. A reset spring is provided between the main ruler and the movable ruler, so that the movable ruler can reset itself after measurement, and there is no need to manually adjust the position of the movable ruler. The utility model is particularly suitable for situations where multiple measurements need to be made. The operation is more convenient and quick. The utility model has the characteristics of simple structure, compact appearance, easy to carry, high measurement accuracy, good practicality, strong versatility, wide application range, etc.

[0052] The above content is a further detailed description of the present invention in conjunction with the preferred technical solution, and the specific implementation of the present invention cannot be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, simple deductions and substitutions can be made without departing from the concept of the present invention, and all of these should be considered as within the scope of protection of the present invention.

Claims

1. A multifunctional measuring ruler, characterized by: It includes a main scale and a movable scale, the movable scale is slidably mounted on the main scale, a return spring is arranged between the movable scale and the main scale, one end of the return spring is connected to the main scale by a bolt, and the other end of the return spring is connected to the movable scale by a bolt, the main scale is provided with a digital display and a locking knob for tightening the movable scale, the front end of the main scale is detachably mounted with a reference piece or a gap depth measuring head, the movable scale is provided with a capacitive grating sensor corresponding to the digital display, the front end of the movable scale is provided with a mounting hole for mounting a measuring piece or a gap depth reference plate, the end of the front end of the movable scale is provided with a narrow plate for measurement, and the two end surfaces of the narrow plate are respectively arranged perpendicular to the movable scale.

2. A multifunctional measuring ruler according to claim 1, characterized in that: The movable ruler is slidably mounted on one side of the main ruler, and a fixed block is mounted on the other side of the main ruler through bolts. A sliding block is slidably mounted on the fixed block, and the rear end of the sliding block is connected to the rear end of the movable ruler through bolts. A handle is provided at the front end of the sliding block.

3. A multifunctional measuring ruler according to claim 1 or 2, characterized in that: The reference member includes a first reference plate, which has an L-shaped structure. One end of the first reference plate is installed on the front end of the main scale by a bolt, and the other end of the first reference plate is provided with two stepped platforms, and the two stepped platforms are arranged toward the rear end of the main scale.

4. The multifunctional measuring ruler according to claim 3, characterized in that: The two-step platform includes a first step platform and a second step platform, the thickness of the first step platform is 1 mm, and the thickness of the second step platform is 2 mm.

5. The multifunctional measuring ruler according to claim 4, characterized in that: The measuring piece includes a measuring plate, which has an L-shaped structure. One end of the measuring plate is installed on the front end of the moving ruler by a bolt, and the other end of the measuring plate is arranged opposite to the other end of the first reference plate, and the end of the end is provided with a three-step platform, and the three-step platform is arranged toward the front end of the moving ruler.

6. The multifunctional measuring ruler according to claim 5, characterized in that: The three-step platform includes a third step platform, a fourth step platform and a fifth step platform. The thickness of the third step platform is 1 mm, the thickness of the fourth step platform is 2 mm, and the thickness of the fifth step platform is 3 mm.

7. A multifunctional measuring ruler according to claim 1 or 2, characterized in that: The reference part includes a second reference plate, which has a T-shaped structure. One end of the second reference plate is mounted on the front end of the main scale by a bolt, and the end face of the other end of the second reference plate is perpendicular to the main scale. The measuring part includes a wheel groove wear measuring head, one end of the wheel groove wear measuring head is mounted on the front end of the movable scale by a bolt, and the other end of the wheel groove wear measuring head is a cylinder, and a groove is provided on the outer wall of the cylinder away from one end of the movable scale.

8. The multifunctional measuring ruler according to claim 7, characterized in that: There are five wheel groove wear measuring heads, and the diameters of the cylinders of the five wheel groove wear measuring heads are 8 mm, 10 mm, 12 mm, 13 mm and 16 mm respectively.

9. A multifunctional measuring ruler according to claim 1 or 2, characterized in that: One end of the gap depth measuring head is installed on the front end of the main scale by a bolt, and the other end of the gap depth measuring head is an isosceles right triangle structure. One right-angled side of the isosceles right triangle structure is perpendicular to the main scale, and the other right-angled side of the isosceles right triangle structure is parallel to the main scale. The hypotenuse of the isosceles right triangle structure is set toward the movable scale, and scales are set on both sides of the isosceles right triangle structure, and the scales are located at the hypotenuse position of the isosceles right triangle structure.

10. The multifunctional measuring ruler according to claim 9, characterized in that: The gap depth reference plate has an L-shaped structure. One end of the gap depth reference plate is installed on the front end of the movable ruler by a bolt. The other end of the gap depth reference plate is arranged back to the gap depth measuring head, and the end of this end is provided with a three-step platform, which is arranged toward the front end of the movable ruler.

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