Device for measuring gear pitch deviation

Abstract

This invention relates to the field of gear precision testing technology, specifically a gear pitch deviation measuring device. The device includes a test platform with a measuring support plate on one side of its top. A clamping mechanism is fixedly installed in the measuring support plate, and the clamping mechanism includes a measuring surface treatment mechanism and a rotation limiting mechanism. The invention clamps and fixes the gear to be tested using the clamping mechanism. During clamping, the shaft adjustment mechanism gradually aligns the gear's central axis with the central axis of the clamping plate, ensuring the gear's shaft alignment accuracy. The measuring surface treatment mechanism cleans the gear teeth during clamping, preventing residual impurities from contacting the testing probe and causing measurement errors. The rotation limiting mechanism ensures that the angular offset of the clamping plate remains consistent with each rotation during tooth profile testing, thus guaranteeing the device's measurement accuracy.

Description

Technical Field

[0001] This invention belongs to the field of gear precision testing technology, specifically relating to a device for measuring gear pitch deviation. Background Technology

[0002] Gears are crucial components in rotary transmission. Ideal gear transmission is uniform, smooth, and vibration-free. However, tooth pitch deviation directly disrupts this ideal state. Gears with large errors exhibit a discrepancy between the actual and theoretical rotation angle per revolution. This error causes a sudden change in speed at the moment of engagement and disengagement of each tooth, resulting in acceleration impact. Gears with deviations are prone to alignment misalignment and uneven rotational speed during transmission. Therefore, after machining, tooth pitch deviation measurement equipment is needed to inspect the manufacturing accuracy of the gears. Traditional measurement uses gear measuring centers, which are highly specialized precision instruments and extremely expensive. In contrast, roughness profilers are compact, inexpensive, and can measure microscopic height and horizontal profiles. Applying them to gear tooth pitch deviation measurement can significantly reduce measurement costs. During the measurement process, all tooth profiles are measured sequentially by providing periodic angular offsets. However, the inspection process requires high gear alignment accuracy; deviations in alignment accuracy will result in measurement errors. Therefore, designing a gear tooth pitch deviation measurement device is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a simple and reasonably designed device for measuring gear pitch deviation in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] A device for measuring gear pitch deviation includes a test platform, a measuring support plate on one side of the top of the test platform, a clamping mechanism fixedly mounted on the measuring support plate, a measuring surface processing mechanism on the clamping mechanism, a rotation limiting mechanism on the clamping mechanism, a control module mounted on one side of the test platform, and a measuring mechanism on the top of the measuring support plate.

[0006] The clamping mechanism includes a lower support fixed to the measuring support plate, a double-ended screw rotatably connected to the lower support, clamping plates symmetrically arranged on the double-ended screw, a support block on the top of the clamping plate, and the support block slidably connected to a groove opened in the outer wall of the clamping plate; an axis adjustment mechanism is provided between the clamping plates.

[0007] As a further optimization of the present invention, the shaft adjustment mechanism includes a central sleeve rotatably connected in the clamping plate, a support groove is evenly provided on the side wall of the central sleeve, an iron slider is slidably connected in the support groove, and a support wheel is rotatably connected on the iron slider.

[0008] As a further optimization of the present invention, a fixed sleeve is fixedly connected in the central sleeve, the fixed sleeve is connected to a transmission screw, one end of the transmission screw is fixedly connected to a conical magnetic block, and the iron slider is slidably connected to the side wall of the conical magnetic block.

[0009] As a further optimization of the present invention, one end of the central sleeve is fixedly connected to a limiting ring, the limiting ring is slidably connected in the limiting frame, and the contact surface between the limiting ring and the limiting frame is provided with a friction surface. The limiting frame is fixedly connected to the output end of the limiting cylinder, and the limiting cylinder is fixedly installed on one side of the lower support.

[0010] As a further optimization of the present invention, a square groove is provided on the transmission screw, and a transmission bar is slidably connected in the square groove. The transmission bar is fixedly connected to the output end of the servo motor, and the servo motor is fixed on the measuring support plate.

[0011] As a further optimization of the present invention, a support frame is symmetrically arranged on the clamping plate, an elastic bracket is slidably connected in the support frame, a support spring is provided between the elastic bracket and the support frame, a limiting roller is rotatably connected on the elastic bracket, a limiting rod is sleeved in the through hole opened in the elastic bracket, the limiting rod is slidably connected in the slide groove opened in the support frame, and the ends of adjacent limiting rods are connected by a connecting sleeve.

[0012] As a further optimization of the present invention, the rotation limiting mechanism includes a mounting block fixed on a clamping plate on one side, a locking cylinder fixedly installed in the mounting block, an indexing slider fixedly connected to the output end of the locking cylinder, and the indexing slider inserted into an indexing groove, the indexing groove being evenly opened on the side wall of the clamping plate.

[0013] As a further optimization of the present invention, the measuring surface processing mechanism includes a first pillar rotatably connected to a lower support, a side bracket provided on one side of the lower support, a second pillar rotatably connected to the side bracket, the first pillar and the second pillar being connected to a first connecting belt through a groove opened on the side wall, and a roller brush sleeved on the first pillar.

[0014] As a further optimization of the present invention, a second connecting strip is wound around the groove at the top of the second pillar, the second connecting strip is wound around the groove of the third pillar, and one end of the third pillar is fixed to the central sleeve.

[0015] As a further optimization of the present invention, the measuring mechanism includes a support shell fixed on a measuring support plate, a lifting screw rotatably connected in the support shell, a lifting housing provided on the lifting screw, the lifting housing sliding in a through groove opened on one side of the support shell, a display screen embedded in one side of the lifting housing, and a measuring cylinder fixedly installed in the lifting housing, a pressure sensor provided on the output end of the measuring cylinder, a detection probe provided on the pressure sensor, a lifting motor fixedly connected to the bottom of the measuring support plate, and the output end of the lifting motor fixedly connected to the bottom end of the lifting screw.

[0016] The beneficial effects of this invention are as follows:

[0017] In this invention, during gear installation, the servo motor drives the transmission screw to rotate via the transmission bar. During the rotation of the transmission screw, the fixed sleeve is restricted from rotating due to friction between the limit ring and the limit frame. At this time, the rotation of the transmission screw, through its cooperation with the fixed sleeve, causes the transmission screw and the conical magnetic block to slide towards the inside of the central sleeve. During the sliding of the conical magnetic block, the conical sidewall on the conical magnetic block presses the iron slider towards the outside of the central sleeve. The four sets of iron sliders and support wheels slide synchronously. During the synchronous outward movement of the four sets of support wheels, they press against the inner wall of the central hole of the gear, causing the central axis of the gear to gradually coincide with the central axis of the clamping plate, thereby ensuring the gear's alignment accuracy.

[0018] During the rotation of the clamped gear and central sleeve, the second support column can be driven to rotate by the second connecting belt, and then the roller brush on the first support column can be driven to rotate synchronously by the first connecting belt. During the rotation of the roller brush, the surface of the teeth on the gear can be cleaned, so as to avoid the impurities remaining on the teeth from contacting the detection probe during the detection process and causing measurement errors.

[0019] In this invention, during the sequential measurement of all teeth of a gear, a servo motor drives the central sleeve and the gear to rotate by the angular offset of one tooth. Subsequently, as the servo motor stops rotating, a locking cylinder is used to drive the indexing slider to move closer to the clamping plate. After the indexing slider gradually contacts the indexing groove, the rotation angle of the entire clamping plate is locked, ensuring that the angular offset of the clamping plate remains consistent with each rotation during tooth profile detection, thereby guaranteeing the measurement accuracy of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a partial structural schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation position of the lifting motor in this invention;

[0023] Figure 4 This is a partially exploded view of the structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the assembly structure of the shaft adjustment mechanism in this invention;

[0025] Figure 6 This is a schematic diagram of the assembly structure of the clamping mechanism in this invention;

[0026] Figure 7 yes Figure 6 A magnified view of a portion of region A in the middle;

[0027] Figure 8 This is an assembly diagram of the first connecting belt, the second connecting belt, and the second support column of the present invention.

[0028] In the diagram: 1. Test platform; 2. Measuring support plate; 3. Clamping mechanism; 4. Axis adjustment mechanism; 6. Measuring surface treatment mechanism; 7. Rotation limit mechanism; 8. Measuring mechanism; 30. Connecting sleeve; 31. Lower support; 32. Double-ended screw; 33. Clamping plate; 34. Support block; 35. Clamping plate; 36. Support frame; 37. Elastic bracket; 38. Support spring; 39. Limiting roller; 40. Limiting rod; 41. Central sleeve; 42. Iron slider; 43. Support wheel; 44. Fixed sleeve; 45. Transmission screw; 46. ​​Conical magnetic block; 47. Limiting ring; 48. Limiting frame; 49. Limiting cylinder; 50. Transmission bar; 51. Servo motor; 61. First support column; 62. Side bracket; 63. Second support column; 64. First connecting belt; 65. Roller brush; 66. Second connecting belt; 67. Third support column; 71. Mounting block; 72. Locking cylinder; 73. Indexing slider; 74. Indexing groove; 81. Support shell; 82. Lifting screw; 83. Lifting housing; 84. Measuring cylinder; 85. Detection probe; 86. Lifting motor. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] Example: Please refer to Figures 1-8A gear pitch deviation measuring device includes a test platform 1, a measuring support plate 2 on one side of the top of the test platform 1, a clamping mechanism 3 fixedly installed in the measuring support plate 2, the clamping mechanism 3 for fixing the gear to be tested, a measuring surface treatment mechanism 6 on the clamping mechanism 3 for cleaning the testing surface of the gear during clamping to avoid residual impurities on the testing surface affecting the testing accuracy, a rotation limit mechanism 7 on the clamping mechanism 3 to ensure that the angular offset of the gear is consistent with each rotation, a control module is installed on one side of the test platform 1, and a measuring mechanism 8 is installed on the top of the measuring support plate 2, a detection probe 85 is installed in the measuring mechanism 8 for completing the gear tooth profile detection, the detection data is transmitted to the control module for analysis, and the gear pitch deviation is detected by all tooth profile data.

[0031] Please see Figures 3-4 and Figures 6-7 The clamping mechanism 3 includes a lower support 31 fixed to the measuring support plate 2 by bolts. A double-ended screw 32 is rotatably connected to the lower support 31 via bearings. Clamping plates 33 are fitted onto the symmetrically opened threaded grooves at both ends of the double-ended screw 32. One end of the double-ended screw 32 passes through the clamping plate 33 and is connected to a knob. The two clamping plates 33 can move closer or further away synchronously with the rotation of the double-ended screw 32. A support block 34 is provided on the top of the clamping plate 33. The support block 34 is slidably connected in a groove opened on the outer wall of the clamping plate 35. The support block 34 limits the sliding of the clamping plate 35, allowing the clamping plate 35 to rotate around its own axis. An axis adjustment mechanism 4 is provided between the two clamping plates 35. Four sets of support frames 36 are symmetrically arranged on the clamping plate 35. Elastic brackets 37 are slidably connected in the grooves opened on the support frames 36. Support springs 38 are arranged between the elastic brackets 37 and the support frames 36. The support springs 38 are located inside the grooves opened on the support frames 36. Limiting rollers 39 are symmetrically connected to the elastic brackets 37 through bearings. Limiting rods 40 are sleeved in the through holes opened on the elastic brackets 37. The limiting rods 40 are slidably connected in the grooves opened on the support frames 36. Adjacent limiting rods 40 are connected end to end by connecting sleeves 30 for fixation. The quadrilateral frame formed by the connecting sleeves 30 and the limiting rods 40 limits the elastic brackets 37, so that the four sets of elastic brackets 37 are on the same vertical plane.

[0032] Please see Figures 3-7The shaft adjustment mechanism 4 includes a central sleeve 41 rotatably connected to the clamping plate 35. Support grooves are evenly distributed on the side wall of the central sleeve 41. An iron slider 42 is slidably connected in the support grooves. A support wheel 43 is rotatably connected to the iron slider 42 via a bearing. A fixing sleeve 44 is fixedly installed in the central sleeve 41. The fixing sleeve 44 is connected to the transmission screw 45 via an internally embedded ball nut. One end of the transmission screw 45 is fixedly connected to a conical magnet 46. The iron slider 42 slides on the conical magnet 46 by magnetic attraction. On the conical sidewall of the magnetic block 46, one end of the central sleeve 41 is fixedly locked in the limiting ring 47 by bolts. The limiting ring 47 is slidably connected in the groove at the top of the limiting frame 48. The limiting frame 48 is fixedly connected to the output end of the limiting cylinder 49, and the limiting cylinder 49 is fixedly installed on one side of the lower support 31 by a bracket. A square groove is opened on the transmission screw 45, and a square transmission bar 50 is slidably connected in the square groove. The transmission bar 50 is fixedly connected to the output end of the servo motor 51 by a flange, and the servo motor 51 is fixedly supported on the measuring support plate 2 by a bracket.

[0033] Please see Figure 4 and Figure 6 The rotation limiting mechanism 7 includes a mounting block 71 fixed on a clamping plate 33 on one side. A locking cylinder 72 is fixedly connected to the mounting block 71. An indexing slider 73 is fixedly connected to the output end of the locking cylinder 72. The indexing slider 73 is inserted into an indexing groove 74. The indexing groove 74 is evenly distributed on the side wall of the clamping plate 35. The indexing groove 74 is circumferentially distributed on the side edge of the clamping plate 35. The shape of the indexing groove 74 corresponds to the indexing slider 73. Before measurement, the locking cylinder 72 is used to drive the indexing slider 73 to approach the clamping plate 35. After the indexing slider 73 gradually contacts the indexing groove 74, the rotation angle of the entire clamping plate 35 is locked, so that the angular offset of the clamping plate 35 during each rotation is consistent during tooth profile detection.

[0034] Please see Figures 3-6 and Figure 8 The measuring surface processing mechanism 6 includes a first pillar 61 rotatably connected to a lower support 31. A side bracket 62 is provided on one side of the lower support 31. A second pillar 63 is rotatably connected to the side bracket 62. A first connecting belt 64 is wound around the first pillar 61 and the second pillar 63. A roller brush 65 with cleaning brush is fixedly sleeved on the first pillar 61. A second connecting belt 66 is wound around the second pillar 63. The second connecting belt 66 is wound around a third pillar 67. One end of the third pillar 67 is fixed to one end of the central sleeve 41. During the rotation of the central sleeve 41, the second pillar 63 can be driven to rotate through the second connecting belt 66. Then, the roller brush 65 on the first pillar 61 is driven to rotate synchronously through the first connecting belt 64. During the rotation of the roller brush 65, the surface of the teeth on the gear can be cleaned.

[0035] Please see Figures 1-3 The measuring mechanism 8 includes a support shell 81 fixed on the measuring support plate 2. A lifting screw 82 is rotatably connected to the support shell 81 via bearings. A lifting housing 83 is mounted on the lifting screw 82. The lifting housing 83 is connected to the lifting screw 82 through an internally embedded ball nut. The lifting housing 83 slides in a through groove on one side of the support shell 81 to prevent relative rotation during the up-and-down movement of the lifting housing 83. A display screen is embedded on one side of the lifting housing 83, and a measuring cylinder 84 is fixedly mounted in the lifting housing 83. A pressure sensor is mounted on the output end of the measuring cylinder 84, and a detection probe 85 is mounted on the pressure sensor. A lifting motor 86 is fixedly connected to the bottom of the measuring support plate 2, and the output end of the lifting motor 86 is fixed... Connected to the bottom end of the lifting screw 82, the lifting motor 86 drives the lifting screw 82 to rotate during measurement. Utilizing the cooperation between the lifting screw 82 and the lifting housing 83, the entire lifting housing 83 moves up and down along the axis of the lifting screw 82, aligning the height of the detection probe 85 with the axis height of the detection gear. Then, the measuring cylinder 84 extends the detection probe 85. During this process, a pressure sensor collects the pressure received by the detection probe 85 and transmits the data to the control module. The control module detects the pressure on the pressure sensor and determines that the detection probe 85 is in contact with the gear surface. It then combines this with the travel of the measuring cylinder 84 to measure the gear tooth profile. Finally, all tooth profile data are sequentially measured to complete the gear pitch deviation measurement process.

[0036] It should be noted that, when using this gear pitch deviation measuring device, first place the gear to be measured between the two clamping plates 35, then insert the center sleeve 41 into the two clamping plates 35, simultaneously passing the center sleeve 41 through the center hole of the gear. Next, manually rotate the knob at one end of the double-ended screw 32. During the rotation of the double-ended screw 32, the clamping plates 33 on both sides will move closer together. The limiting rollers 39 on the elastic supports 37 on both sides are initially fixed to the gear by the support springs 38. The limiting cylinder 49 then moves the limiting frame 48 upwards. After the limiting bracket 48 is fitted onto the bottom edge of the limiting ring 47, it can prevent the central sleeve 41 from sliding left and right. Then, the servo motor 51 drives the transmission screw 45 to rotate through the transmission bar 50. During the rotation of the transmission screw 45, the fixed sleeve 44 will be restricted from rotating due to the friction between the limiting ring 47 and the limiting bracket 48. At this time, the rotation of the transmission screw 45 will cause the transmission screw 45 and the conical magnetic block 46 to slide into the central sleeve 41 through the cooperation with the fixed sleeve 44. During the sliding process, the conical magnetic block 46 will squeeze the iron slider 42 outward from the central sleeve 41 through the conical sidewall of the conical magnetic block 46. Four sets of iron sliders 42 and support wheels 43 slide synchronously. During the synchronous outward movement of the four sets of support wheels 43, they press against the inner wall of the central hole of the gear, causing the central axis of the gear to gradually coincide with the central axis of the clamping plate 35. After complete coincidence, the movement of the support wheels 43 is locked by the central hole of the gear. At this time, the fixed sleeve 44 will no longer rotate relative to the transmission screw 45. The position between the fixed sleeve 44 and the transmission screw 45 is relatively locked. The rotational torque of the transmission screw 45 directly acts on the central sleeve 41 and the fixed sleeve 44. The fixed sleeve 44 and the central sleeve 41 will rotate synchronously with the transmission screw 45. Then, rotate the double-headed screw 32 again to bring the support blocks 34 on both sides closer together. At the same time, squeeze the support spring 38 to make the elastic bracket 37 completely enter the interior of the support block 34. Then, the support block 34 replaces the elastic bracket 37 to completely fix the gear on both sides. At this time, the clamping plate 35 can rotate synchronously with the gear. During the rotation of the gear and the central sleeve 41, the second column 63 can be driven to rotate through the second connecting belt 66. Then, the roller brush 65 on the first column 61 can be driven to rotate synchronously through the first connecting belt 64. During the rotation of the roller brush 65, the surface of the teeth on the gear can be cleaned.Then, using the cooperation between the lifting screw 82 and the lifting housing 83, the entire lifting housing 83 is driven to move up and down along the axis of the lifting screw 82, so that the height of the detection probe 85 is consistent with the axis height of the detection gear. Then, the measuring cylinder 84 drives the detection probe 85 to extend. During the process, the pressure sensor collects the pressure received by the detection probe 85 and transmits the data to the control module. After the control module detects the pressure sensor receiving pressure, it determines that the detection probe 85 is in contact with the surface of the gear. Then, combined with the movement of the output end of the measuring cylinder 84, the tooth profile of the gear is measured. After that, the measuring cylinder 84 drives the detection... The probe 85 returns to its original position. Then, the servo motor 51 drives the central sleeve 41 and the gear to rotate by the angular offset of one tooth. Subsequently, as the servo motor 51 stops rotating, the locking cylinder 72 drives the indexing slider 73 to move closer to the clamping plate 35. After the indexing slider 73 gradually contacts the indexing groove 74, the rotation angle of the entire clamping plate 35 is locked, ensuring that the angular offset of the clamping plate 35 remains consistent with each rotation during tooth profile detection. Then, the control module drives the locking cylinder 72, the measuring cylinder 84, and the servo motor 51 to reciprocate, sequentially detecting all tooth profile data, completing the gear pitch deviation measurement process.

[0037] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A device for measuring gear pitch deviation, comprising a test platform, characterized in that: A measuring support plate is provided on one side of the top of the test platform. A clamping mechanism is fixedly installed on the measuring support plate. A measuring surface processing mechanism is provided on the clamping mechanism. A rotation limiting mechanism is provided on the clamping mechanism. A control module is installed on one side of the test platform. A measuring mechanism is provided on the top of the measuring support plate. The clamping mechanism includes a lower support fixed to the measuring support plate, a double-ended screw rotatably connected to the lower support, clamping plates symmetrically arranged on the double-ended screw, a support block on the top of the clamping plate, and the support block slidably connected to a groove opened in the outer wall of the clamping plate; an axis adjustment mechanism is provided between the clamping plates. The shaft adjustment mechanism includes a central sleeve rotatably connected to a clamping plate. Support grooves are evenly distributed on the side wall of the central sleeve. An iron slider is slidably connected to the support groove, and a support wheel is rotatably connected to the iron slider. A fixed sleeve is fixedly connected to the central sleeve, and the fixed sleeve is connected to a transmission screw. One end of the transmission screw is fixedly connected to a conical magnetic block. The iron slider is slidably connected to the side wall of the conical magnetic block. A limit ring is fixedly connected to one end of the central sleeve. The limit ring is slidably connected to a limit frame, and the contact surface between the limit ring and the limit frame is provided with a friction surface. The limit frame is fixedly connected to the input of a limit cylinder. The output end is provided, and the limiting cylinder is fixedly installed on one side of the lower support. A square groove is provided on the transmission screw, and a transmission bar is slidably connected in the square groove. The transmission bar is fixedly connected to the output end of the servo motor, and the servo motor is fixed on the measuring support plate. Support frames are symmetrically arranged on the clamping plate. An elastic bracket is slidably connected in the support frame. A support spring is provided between the elastic bracket and the support frame. A limiting roller is rotatably connected on the elastic bracket. A limiting rod is sleeved in the through hole opened on the elastic bracket. The limiting rod is slidably connected in the slide groove opened on the support frame. The ends of adjacent limiting rods are connected by a connecting sleeve. The measuring mechanism includes a support shell fixed to a measuring support plate, a lifting screw rotatably connected to the support shell, a lifting housing mounted on the lifting screw, the lifting housing sliding in a through groove on one side of the support shell, a display screen embedded in one side of the lifting housing, and a measuring cylinder fixedly mounted in the lifting housing. A pressure sensor is mounted on the output end of the measuring cylinder, and a detection probe is mounted on the pressure sensor. A lifting motor is fixedly connected to the bottom of the measuring support plate, and the output end of the lifting motor is fixedly connected to the bottom end of the lifting screw.

2. The gear pitch deviation measuring device according to claim 1, characterized in that: The rotation limiting mechanism includes a mounting block fixed on one side of the clamping plate. A locking cylinder is fixedly installed in the mounting block. The output end of the locking cylinder is fixedly connected to an indexing slider, which is inserted into an indexing groove. The indexing groove is evenly opened on the side wall of the clamping plate.

3. The gear pitch deviation measuring device according to claim 1, characterized in that: The measuring surface processing mechanism includes a first pillar rotatably connected to a lower support, a side bracket provided on one side of the lower support, a second pillar rotatably connected to the side bracket, the first pillar and the second pillar being connected by a first connecting belt through a groove in the side wall, and a roller brush sleeved on the first pillar.

4. The gear pitch deviation measuring device according to claim 3, characterized in that: The second support column has a groove at its top with a second connecting band wrapped around it. The second connecting band is wrapped around the groove of the third support column, and one end of the third support column is fixed to the central sleeve.

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