Rapid detection equipment for M value of flexible gear

Abstract

The invention provides flexible gear M value rapid detection equipment, relates to the technical field of detection equipment, and aims to solve the technical problems that in the prior art, flexible gear M value is difficult to detect manually, the detection process is time-consuming, and the assembly progress is affected. A flexible gear M value rapid detection device comprises a bottom plate, a liquid expansion clamp, a first measuring bar, a second measuring bar, a fixed measuring head assembly, a movable measuring head assembly, a displacement type contact sensor and a numerical value display, the liquid expansion clamp is slidably connected to the bottom plate, the fixed measuring head assembly is fixedly connected to the bottom plate, the first measuring bar is fixedly connected to the fixed measuring head assembly, and the second measuring bar is fixedly connected to the movable measuring head assembly. The movable measuring head assembly is connected to the bottom plate in a sliding mode, the second measuring rod is fixedly connected to the movable measuring head assembly, the first measuring rod and the second measuring rod measure the reference diameter of the flexible gear by moving the movable measuring head assembly, and the movable measuring head assembly makes contact with the displacement type contact sensor. And the numerical value display is electrically connected with the displacement type contact sensor and is used for displaying numerical values detected by the displacement type contact sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and more specifically, it refers to a rapid detection device for the M value of a flexible gear. Background Art

[0002] In recent years, with the rapid development of the robot industry and the automation industry, the market has a huge demand for harmonic reducers, which is both an opportunity and a challenge for harmonic reducer manufacturers. As one of the key components of a harmonic reducer, the M value parameter of the tooth profile of the flexible gear, that is, the distance over pins, has a great influence on the performance of the harmonic. If the M value of the flexible gear is too small, it will lead to a reduction in the transmission efficiency of the harmonic reducer, a shortening of the fatigue life, and a risk of resonance. And if the M value of the flexible gear is too large, the same problems will occur. Therefore, only when the M value of the flexible gear meets the designed dimension range can the performance of the harmonic reducer be fully exerted. Currently, in the assembly of harmonic reducers, the rigid gear and the flexible gear need to be sorted in pairs before assembly, and the sorting basis mainly refers to the M value parameters of the rigid gear and the flexible gear. Since the flexible gear is a flexible component and difficult to detect manually, the currently commonly used detection method is to use a professional gear detector for detection, but this detection process will consume a huge amount of time, affect the assembly progress, and is not conducive to mass assembly. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a rapid detection device for the M value of a flexible gear, so as to solve the technical problem that the M value of the flexible gear in the prior art is difficult to detect manually and the detection process is time-consuming, which affects the assembly progress.

[0004] To solve the above technical problems, the present invention provides a rapid detection device for the M value of a flexible gear, including a bottom plate, a hydraulic expansion fixture, a first measuring rod, a second measuring rod, a fixed probe assembly, a moving probe assembly, a displacement contact sensor, and a numerical display. The hydraulic expansion fixture is slidably connected to the bottom plate in the left-right direction and is used to tighten the flexible gear. The fixed probe assembly and the moving probe assembly are respectively located on the left and right sides of the hydraulic expansion fixture. The fixed probe assembly is fixedly connected to the bottom plate, the first measuring rod is fixedly connected to the fixed probe assembly, the moving probe assembly is slidably connected to the bottom plate in the left-right direction, the second measuring rod is fixedly connected to the moving probe assembly, both the first measuring rod and the second measuring rod are provided with measuring balls for being clamped between two teeth of the flexible gear, the displacement contact sensor and the numerical display are both connected to the bottom plate. By moving the moving probe assembly, the first measuring rod and the second measuring rod measure the pitch diameter of the flexible gear, and the moving probe assembly contacts the displacement contact sensor. The numerical display is electrically connected to the displacement contact sensor and is used to display the value detected by the displacement contact sensor.

[0005] After adopting the above structure, a flexible gear M value rapid detection device of the present invention has the following advantages: The flexible gear to be detected is placed on the hydraulic expansion fixture, and the flexible gear is tightened by the hydraulic expansion fixture, avoiding the deformation of the flexible gear during the detection process and affecting the detection accuracy. Moving the hydraulic expansion fixture can make the measuring ball of the first measuring rod be stuck between two teeth of the flexible gear. Moving the moving probe assembly can make the measuring ball of the second measuring rod be stuck between two teeth of the flexible gear. And the first measuring rod and the second measuring rod are arranged along the diameter direction of the flexible gear. After the measuring ball of the second measuring rod is stuck between two teeth of the flexible gear, the position of the moving probe assembly is determined and the detection data of the current displacement contact sensor is displayed by the numerical display, obtaining the pitch circle diameter d of the flexible gear. Combining with the number of teeth z of the flexible gear, the M value of the flexible gear is calculated through the calculation formula M = d / z, thereby quickly and accurately detecting the M value of the flexible gear and accelerating the assembly progress.

[0006] As an improvement, the present invention further includes a pin gauge. By moving the moving probe assembly, the measuring balls of the first measuring rod and the second measuring rod are respectively abutted against both ends of the pin gauge, and the displacement contact sensor records the reference value of the pitch circle diameter of the flexible gear; adopting this structure, the reference value of the pitch circle diameter of the flexible gear is determined by the pin gauge before measurement, and when actually measuring the flexible gear, the actual deviation value of the pitch circle diameter of the flexible gear can be directly obtained by the displacement contact sensor, making the measurement more convenient.

[0007] As an improvement, a linear guide rail is connected to the bottom plate, and the moving probe assembly is slidably connected to the linear guide rail through a slider; adopting this structure, the moving probe assembly has a high position accuracy, reducing the measurement error of the flexible gear M value.

[0008] As an improvement, a base is fixedly connected to the bottom plate, a guide rod slidably connected to the base is connected to the moving probe assembly, and a spring is sleeved on the guide rod. Both ends of the spring are respectively abutted against the moving probe assembly and the base; adopting this structure, the elastic force of the spring drives the moving probe assembly to move towards the hydraulic expansion fixture direction, making the measuring ball of the second measuring rod be stuck between two teeth of the flexible gear, and the force can be kept constant, reducing the measurement error of the flexible gear M value.

[0009] As an improvement, a fixing component for fixing the moving probe assembly to prevent the moving probe assembly from moving towards the hydraulic expansion fixture direction is fixedly connected to the bottom plate. The fixing component includes a spherical buckle fixedly connected to the bottom plate and a ball head fixedly connected to the moving probe assembly; adopting this structure, the ball head is fixed by the spherical buckle in the fixing component before measurement, preventing the moving probe assembly from moving towards the hydraulic expansion fixture direction.

[0010] As an improvement, the hydraulic expansion fixture is slidably connected to the linear guide rail through a slider; adopting this structure, the hydraulic expansion fixture has a high position accuracy relative to the fixed probe assembly and the moving probe assembly, reducing the measurement error of the flexible gear M value.

[0011] As an improvement, a number of pins for positioning the linear guide rail and fixing the probe assembly are connected to the bottom plate; with this structure, the position accuracy of the linear guide rail and the probe assembly is improved, and the measurement error of the flexspline M value is reduced.

[0012] As an improvement, the fixed probe assembly includes a fixed block, a first connecting block and a first fixing bolt. The fixed block is fixedly connected to the bottom plate. A first guiding block is provided at the upper end of the fixed block. The first connecting block is slidably connected to the first guiding block in the front-rear direction. A first long hole is provided on the first connecting block in the front-rear direction. The first fixing bolt passes through the first long hole and is threadedly connected to the fixed block. The first measuring rod is fixedly connected to the first connecting block; with this structure, the first connecting block can adjust its position in the front-rear direction, so as to adjust the position of the first measuring rod in the front-rear direction, ensuring that the first measuring rod and the second measuring rod can be arranged along the diameter of the flexspline and inserted into two opposite tooth grooves of the flexspline.

[0013] As an improvement, the movable probe assembly includes a movable block, a second connecting block and a second fixing bolt. The movable block is slidably connected to the bottom plate. A second guiding block is provided at the upper end of the movable block. The second connecting block is slidably connected to the second guiding block in the front-rear direction. A second long hole is provided on the second connecting block in the front-rear direction. The second fixing bolt passes through the second long hole and is threadedly connected to the movable block. The second measuring rod is fixedly connected to the second connecting block; with this structure, the second connecting block can adjust its position in the front-rear direction, so as to adjust the position of the second measuring rod in the front-rear direction, ensuring that the first measuring rod and the second measuring rod can be arranged along the diameter of the flexspline and inserted into two opposite tooth grooves of the flexspline.

[0014] As an improvement, the movable probe assembly further includes a handle and a contact plate. Both the handle and the contact plate are connected to the movable block. The contact plate is used to contact the displacement contact sensor; with this structure, it is convenient to move the movable probe assembly. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present invention.

[0016] Figure 2 is Figure 1 a partial enlarged view of part A in

[0017] Figure 3 is a top view of the present invention.

[0018] Figure 4 is an exploded structural schematic diagram of the fixed probe assembly part of the present invention.

[0019] Figure 5 is an exploded structural schematic diagram of the movable probe assembly part of the present invention.

[0020] Figure 6This is a schematic structural diagram of the first measuring rod and the second measuring rod when measuring a plug gauge in the present invention.

[0021] Reference numerals: 1, base plate; 2, hydraulic expansion fixture; 3, first measuring rod; 4, second measuring rod; 5, fixed probe assembly; 51, fixed block; 52, first connecting block; 53, first fixing bolt; 6, moving probe assembly; 61, moving block; 62, second connecting block; 63, second fixing bolt; 64, handle; 65, contact plate; 7, displacement contact sensor; 8, digital display; 9, measuring ball; 10, plug gauge; 11, linear guide; 12, base; 13, guide rod; 14, spring; 15, spherical buckle; 16, ball head; 17, pin; 18, first guide block; 19, first long hole; 20, second guide block; 21, second long hole. Detailed implementation manners

[0022] The following will make a detailed description of a flexible gear M value rapid detection device of the present invention with reference to the accompanying drawings.

[0023] As Figures 1 to 6 shown, a flexible gear M value rapid detection device includes a base plate 1, a hydraulic expansion fixture 2, a first measuring rod 3, a second measuring rod 4, a fixed probe assembly 5, a moving probe assembly 6, a displacement contact sensor 7 and a digital display 8. The hydraulic expansion fixture 2 is slidably connected to the base plate 1 in the left-right direction and is used for tightening the flexible gear. The specific structure and working principle of the hydraulic expansion fixture 2 are both prior arts and will not be elaborated here; the fixed probe assembly 5 and the moving probe assembly 6 are respectively located on the left and right sides of the hydraulic expansion fixture 2. The fixed probe assembly 5 is fixedly connected to the base plate 1, the first measuring rod 3 is fixedly connected to the fixed probe assembly 5, the moving probe assembly 6 is slidably connected to the base plate 1 in the left-right direction, the second measuring rod 4 is fixedly connected to the moving probe assembly 6, both the first measuring rod 3 and the second measuring rod 4 are provided with measuring balls 9 for being clamped between two teeth of the flexible gear, the displacement contact sensor 7 and the digital display 8 are both connected to the base plate 1. By moving the moving probe assembly 6, the first measuring rod 3 and the second measuring rod 4 measure the pitch diameter of the flexible gear and the moving probe assembly 6 contacts the displacement contact sensor 7. The digital display 8 is electrically connected to the displacement contact sensor 7 and is used for displaying the value detected by the displacement contact sensor 7.

[0024] When the device is in use, first, a first measuring rod 3 of the corresponding specification needs to be installed on the fixed probe assembly 5. Secondly, a flexible gear of the corresponding specification is placed on the hydraulic expansion fixture 2, and the tightening amount of the hydraulic expansion fixture 2 is adjusted to make the hydraulic expansion fixture 2 tighten the inner hole of the flexible gear, so as to avoid deformation of the flexible gear during the detection process and affect the detection accuracy, and make the measuring ball 9 of the first measuring rod 3 be able to be clamped between two teeth of the flexible gear; when preparing for measurement, a second measuring rod 4 of the corresponding specification is also installed on the moving probe assembly 6, and the moving probe assembly 6 is slowly pushed so that the measuring ball 9 of the second measuring rod 4 can be smoothly clamped between two teeth of the flexible gear, as Figure 2As shown, the first measuring rod 3 and the second measuring rod 4 are arranged along the diameter direction of the flexspline. At this time, the moving probe assembly 6 will compress the displacement contact sensor 7, and the measured value will be displayed on the digital display 8, obtaining the pitch diameter d of the flexspline. Combining with the number of teeth z of the flexspline, the M value of the flexspline is calculated through the calculation formula M = d / z, so as to quickly and accurately detect the M value of the flexspline and accelerate the assembly progress.

[0025] In addition, as Figure 6 shown, the present invention further includes a pin gauge 10. By moving the moving probe assembly 6, the measuring balls 9 of the first measuring rod 3 and the second measuring rod 4 are respectively abutted against both ends of the pin gauge 10, and the displacement contact sensor 7 records the reference value of the pitch diameter of the flexspline. When actually measuring the flexspline, the actual deviation value of the pitch diameter of the flexspline can be directly obtained by the displacement contact sensor 7, making the measurement more convenient.

[0026] As Figure 1 and Figure 3 shown, a linear guide 11 is connected to the base plate 1. The moving probe assembly 6 is slidably connected to the linear guide 11 through a slider, and the hydraulic expansion fixture 2 is also slidably connected to the linear guide 11 through a slider. In addition, a plurality of pins 17 for positioning the linear guide 11 and fixing the probe assembly 5 are connected to the base plate 1. The linear guide 11 is a high-precision linear guide, the pins 17 are high-precision pins, and the slider is a high-precision slider, so as to ensure the position accuracy among the fixed probe assembly 5, the hydraulic expansion fixture 2, and the moving probe assembly 6, that is, the position accuracy among the first measuring rod 3, the flexspline, and the second measuring rod 4, thereby reducing the final measurement error.

[0027] As Figure 1 and Figure 3 shown, a base 12 is fixedly connected to the base plate 1. A guide rod 13 slidably connected to the base 12 is connected to the moving probe assembly 6. A spring 14 is sleeved on the guide rod 13. Both ends of the spring 14 are abutted against the moving probe assembly 6 and the base 12 respectively. The base 12 is located on the right side of the linear guide 11. In this embodiment, there are two linear guides 11, bases 12, guide rods 13, and springs 14.

[0028] As Figure 1 and Figure 3 shown, a fixing component for fixing the moving probe assembly 6 to prevent the moving probe assembly 6 from moving towards the hydraulic expansion fixture 2 is fixedly connected to the base plate 1. The fixing component includes a spherical buckle 15 fixedly connected to the base plate 1 and a ball head 16 fixedly connected to the moving probe assembly 6. The spherical buckle 15 is located between the two bases 12. The specific structure and working principle of the spherical buckle 15 are prior art and will not be elaborated here.

[0029] As Figure 4As shown, the fixed probe assembly 5 includes a fixed block 51, a first connecting block 52 and a first fixing bolt 53. The fixed block 51 is fixedly connected to the bottom plate 1 and positioned by a pin 17. A first guiding block 18 is provided at the upper end of the fixed block 51. A through groove matching the shape and size of the first guiding block 18 is provided at the bottom end of the first connecting block 52, so that the first connecting block 52 is slidably connected to the first guiding block 18 in the front-rear direction. The bottom end of the first connecting block 52 is in contact with the upper end of the fixed block 51. A first long hole 19 is provided on the first connecting block 52 in the front-rear direction. The first fixing bolt 53 passes through the first long hole 19 and is threadedly connected to the fixed block 51. The first measuring rod 3 is fixedly connected to the first connecting block 52. Specifically, the first measuring rod 3 is connected to the top end of the first connecting block 52.

[0030] As Figure 5 shown, the movable probe assembly 6 includes a movable block 61, a second connecting block 62 and a second fixing bolt 63. The movable block 61 is slidably connected to the bottom plate 1. Specifically, the movable block 61 is slidably connected to the linear guide 11 on the bottom plate 1 through a slider to achieve the sliding connection with the bottom plate 1. A second guiding block 20 is provided at the upper end of the movable block 61. A through groove matching the shape and size of the second guiding block 20 is provided at the bottom end of the second connecting block 62, so that the second connecting block 62 is slidably connected to the second guiding block 20 in the front-rear direction. The bottom end of the second connecting block 62 is in contact with the upper end of the movable block 61. A second long hole 21 is provided on the second connecting block 62 in the front-rear direction. The second fixing bolt 63 passes through the second long hole 21 and is threadedly connected to the movable block 61. The second measuring rod 4 is fixedly connected to the second connecting block 62. Specifically, the second measuring rod 4 is connected to the top end of the second connecting block 62. In this embodiment, both the first guiding block 18 and the second guiding block 20 are isosceles trapezoids.

[0031] In addition, the movable probe assembly 6 further includes a handle 64 and a contact plate 65. Both the handle 64 and the contact plate 65 are connected to the movable block 61. The contact plate 65 is used to contact the displacement contact sensor 7. Among them, the handle 64 is located at the rear side of the movable block 61, and the contact plate 65 is located at the front side of the movable block 61, while the guide rod 13 and the ball head 16 are both connected to the movable block 61.

[0032] The present invention can greatly improve the measurement speed on the premise of ensuring the measurement accuracy, thereby improving the assembly efficiency, and has a lower measurement cost compared with professional gear detection instruments. Only by replacing the corresponding measuring rod specifications and the corresponding liquid expansion fixture 2 specifications can the measurement of different flexure gear M values be realized.

[0033] The embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to the above-mentioned one embodiment. All other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present invention.

Claims

1. A flexible pulley M value rapid detection device, characterized in that: The invention comprises a base plate (1), a liquid expansion fixture (2), a first measuring rod (3), a second measuring rod (4), a fixed probe assembly (5), a movable probe assembly (6), a displacement contact sensor (7) and a numerical display (8), wherein the liquid expansion fixture (2) is slidably connected to the base plate (1) in the left-right direction and is used to tighten the flexible wheel, the fixed probe assembly (5) and the movable probe assembly (6) are respectively located on the left and right sides of the liquid expansion fixture (2), the fixed probe assembly (5) is fixedly connected to the base plate (1), the first measuring rod (3) is fixedly connected to the fixed probe assembly (5), and the movable probe assembly (6) is slidably connected to the base plate (1) in the left-right direction. The second measuring rod (4) is fixedly connected to the movable probe assembly (6); the first measuring rod (3) and the second measuring rod (4) are both provided with a measuring ball (9) for being inserted between two teeth of the flexible wheel; the displacement contact sensor (7) and the numerical display (8) are both connected to the base plate (1); the first measuring rod (3) and the second measuring rod (4) measure the pitch circle diameter of the flexible wheel by moving the movable probe assembly (6) and the movable probe assembly (6) contacts the displacement contact sensor (7); the numerical display (8) is electrically connected to the displacement contact sensor (7) and is used to display the value detected by the displacement contact sensor (7).

2. The flexible pulley M value rapid detection device according to claim 1 is characterized in that: It also includes a pin gauge (10), and by moving the movable probe assembly (6) so that the measuring ball (9) of the first measuring rod (3) and the measuring ball (9) of the second measuring rod (4) respectively abut against the two ends of the pin gauge (10), the displacement contact sensor (7) records the reference value of the flexspline pitch circle diameter.

3. The flexible pulley M value rapid detection device according to claim 1 is characterized in that: A linear guide rail (11) is connected to the base plate (1), and the movable probe assembly (6) is slidably connected to the linear guide rail (11) via a slider.

4. The flexible pulley M value rapid detection device according to claim 1 or 3, characterized in that: The bottom plate (1) is fixedly connected to a base (12); the movable probe assembly (6) is connected to a guide rod (13) slidably connected to the base (12); a spring (14) is sleeved on the guide rod (13); two ends of the spring (14) are respectively in contact with the movable probe assembly (6) and the base (12).

5. The flexible pulley M value rapid detection device according to claim 4 is characterized in that: A fixing assembly is fixedly connected to the base plate (1) and is used to fix the movable probe assembly (6) to prevent the movable probe assembly (6) from moving in the direction of the liquid expansion fixture (2). The fixing assembly comprises a spherical buckle (15) fixedly connected to the base plate (1) and a ball head (16) fixedly connected to the movable probe assembly (6).

6. The flexible pulley M value rapid detection device according to claim 3 is characterized in that: The hydraulic expansion clamp (2) is slidably connected to the linear guide rail (11) via a slider.

7. The flexible pulley M value rapid detection device according to claim 6 is characterized in that: A plurality of pins (17) for positioning the linear guide rail (11) and the fixed probe assembly (5) are connected to the base plate (1).

8. The flexible pulley M value rapid detection device according to claim 1 is characterized in that: The fixed probe assembly (5) comprises a fixed block (51), a first connecting block (52) and a first fixing bolt (53); the fixed block (51) is fixedly connected to the base plate (1); a first guide block (18) is provided at the upper end of the fixed block (51); the first connecting block (52) is slidably connected to the first guide block (18) along the front-rear direction; a first long hole (19) is provided on the first connecting block (52) along the front-rear direction; the first fixing bolt (53) passes through the first long hole (19) and is threadedly connected to the fixed block (51); and the first measuring rod (3) is fixedly connected to the first connecting block (52).

9. The flexible pulley M value rapid detection device according to claim 1 is characterized in that: The movable probe assembly (6) comprises a movable block (61), a second connecting block (62) and a second fixing bolt (63); the movable block (61) is slidably connected to the base plate (1); a second guide block (20) is provided at the upper end of the movable block (61); the second connecting block (62) is slidably connected to the second guide block (20) along the front-rear direction; a second long hole (21) is provided on the second connecting block (62) along the front-rear direction; the second fixing bolt (63) passes through the second long hole (21) and is threadedly connected to the movable block (61); and the second measuring rod (4) is fixedly connected to the second connecting block (62).

10. The flexible pulley M value rapid detection device according to claim 9 is characterized in that: The movable probe assembly (6) further comprises a handle (64) and a contact plate (65), wherein the handle (64) and the contact plate (65) are both connected to the movable block (61), and the contact plate (65) is used to contact the displacement contact sensor (7).

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