M-value manual measuring instrument

Abstract

This utility model relates to the field of gear manufacturing and testing technology, and in particular to a manual M-value measuring instrument. The manual M-value measuring instrument includes a base plate and lifting, horizontal movement, and switching components. The lifting component includes a vertical plate, a lifting handwheel, a T-shaped lead screw, a vertical slide rail, a sliding plate, and a support plate. Rotating the handwheel drives the lead screw, causing the sliding plate to move vertically along the slide rail, thereby precisely adjusting the height of the gear on the support plate. The horizontal movement component includes a horizontal guide rail and first and second sliding members on it. The first sliding member is equipped with a probe mounting bracket. The second sliding member is connected to a floating sliding plate via a second slide rail, on which another probe mounting bracket is installed, achieving horizontal centering and floating measurement of the probe. The switching component, through a lever mechanism involving a handle, a rotating rod, and a lifting frame, is linked to the floating sliding plate to control the lifting and releasing states of the measuring head, facilitating gear clamping and measurement. This instrument has a high degree of integration, is easy to operate, and provides stable and reliable measurements.

Description

Technical Field

[0001] This utility model relates to the field of gear manufacturing and testing technology, and in particular to a manual measuring instrument for M value. Background Technology

[0002] In the field of gear manufacturing and inspection, the M-value is a key parameter for evaluating the accuracy of gear tooth thickness, and its measurement accuracy and efficiency directly affect the gear's meshing quality and transmission performance. Traditional gear M-value measurement typically uses a specialized measuring instrument with two parallel probes. However, existing technologies have significant limitations for manual measurement methods.

[0003] Currently, the commonly used manual measurement method, in order to accommodate gears of different sizes and specifications, especially those with varying pitch circle diameters due to changes in the number of teeth or module, requires operators to calculate and select and combine gauge blocks of different sizes to elevate the gear, ensuring the gear center and probe center are at the correct relative height. This process is not only tedious and time-consuming, severely reducing inspection efficiency, but also makes it difficult to guarantee the stability of the gauge block stack, which is prone to loosening or tilting during measurement, introducing human error. Furthermore, the entire measurement process is highly dependent on the operator's experience and feel; the operator must manually control the probe's advance and retreat while simultaneously ensuring stable gear positioning, making it difficult to guarantee consistent measurement force each time. This directly affects the repeatability and accuracy of the measurement results, leading to large data dispersion and poor stability. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problems of low efficiency, insufficient stability, poor repeatability and high dependence on operators in the existing technology mentioned above, a manual M-value measuring instrument is provided, which can quickly, accurately and reliably complete the M-value measurement of gears of different sizes.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a manual M-value measuring instrument, including a base plate and a lifting assembly, a horizontal movement assembly, and a switching assembly disposed on the base plate.

[0006] The lifting assembly includes a vertical plate, a lifting handwheel, a T-shaped screw, a vertical slide rail, a sliding plate, and a support plate. The vertical plate is fixed to the rear edge of the base plate. The lifting handwheel is installed on the top of the vertical plate and connected to the T-shaped screw. The vertical slide rail is connected to the vertical plate. The sliding plate is connected to the screw nut and is slidably connected to the vertical slide rail. The support plate is connected to the sliding plate and is set perpendicular to the sliding plate.

[0007] The horizontal moving component includes a horizontal guide rail and a first sliding member and a second sliding member slidably disposed on the horizontal guide rail. The first sliding member includes a first sliding plate and a first probe mounting bracket mounted on the first sliding plate. The second sliding member includes a second sliding plate, a second slide rail, a floating sliding plate, and a second probe mounting bracket. The second slide rail is mounted on the second sliding plate, the floating sliding plate is slidably disposed on the second slide rail, and the second probe mounting bracket is mounted on the floating sliding plate.

[0008] The switching assembly includes a toggle handle, a handle mounting bracket, a rotating rod, and a lifting bracket. The handle mounting bracket is connected to the second slide plate. The toggle handle is mounted on the handle mounting bracket and its pivot is connected to one end of the rotating rod. The other end of the rotating rod is connected to the lifting bracket, which is connected to the floating slide plate.

[0009] The lifting assembly is responsible for accurately and stably setting the vertical height of the gear, replacing manual stacking of gauge blocks; the horizontal movement assembly is responsible for carrying the probe and achieving precise horizontal alignment and measurement; the switching assembly is responsible for controlling the transition of measurement states. The cooperation between the sliding plate and the second slide rail achieves constant measurement force and buffer protection, allowing the probe to adaptively retract when it contacts the gear.

[0010] According to one embodiment of the present invention, the support plate is connected to a gear placement platform, the gear placement platform has an I-shaped structure and slots on both sides for the first probe mounting bracket and the second probe mounting bracket to enter; a stop block is connected to the gear placement platform, the cross-section of the stop block is E-shaped.

[0011] The slot provides a dedicated, unobstructed movement channel for the two probes, ensuring that they can directly and accurately enter the gear's tooth space for measurement. This avoids interference between the probe mounting bracket and the platform itself, guaranteeing the feasibility of the measurement and the accuracy of the results. The stop is used for radial positioning and limiting of the gear. Its design ensures that the gear's radial position remains unchanged during measurement, thereby improving the accuracy and repeatability of the measurement.

[0012] According to one embodiment of the present invention, the side wall of the upright plate is provided with a scale, and the side wall of the sliding plate is connected to a pointer pointing to the scale.

[0013] The number of rotations of the lifting handwheel is converted into a precise linear displacement reading without any calculations or trial and error.

[0014] According to one embodiment of the present invention, it further includes a force measuring component, which includes a force measuring bracket, a force measuring rod, and a compression spring. The force measuring bracket is connected to the outer edge of the second slide plate, the force measuring rod passes through the force measuring bracket and one end extends into the floating slide plate, and the compression spring is sleeved on the force measuring rod.

[0015] The compression spring continuously applies a constant and opposite elastic force to the floating slide plate through the force measuring rod. This force is eventually transmitted to the probe and manifests as a measuring force acting on the gear tooth surface, ensuring that each measurement is performed under exactly the same mechanical conditions, resulting in stable and reliable data.

[0016] According to one embodiment of the present invention, a floating measuring component is also included. The floating measuring component includes a micrometer, a measuring plate, and a floating measuring base. The measuring plate is connected to the outer end of the second sliding plate. The measuring rod of the micrometer passes through the measuring plate and extends into the floating measuring base. The floating measuring base is connected to the floating sliding plate.

[0017] As a high-precision displacement sensor, the micrometer's measuring rod is connected to the floating measuring base and the floating slide plate. Any tiny backward displacement of the floating slide plate during the measurement process will be accurately captured and displayed by the micrometer. This displacement directly reflects the M value of the gear, realizing direct and accurate readings during the measurement process.

[0018] According to one embodiment of the present invention, the first sliding member further includes a first clamp disposed on a horizontal guide rail, the first clamp being connected to the bottom surface of the first sliding plate.

[0019] According to one embodiment of the present invention, the second sliding member further includes a second clamp disposed on a horizontal guide rail, the second clamp being connected to the bottom surface of the second sliding plate.

[0020] Two clamps transform the adjustable mechanism into a rigid whole. Before measurement, the first and second slides are moved to coarsely adjust the distance between the two probes to accommodate different gears. After adjustment, the clamps firmly lock the slides onto the horizontal guide rail, ensuring the absolute rigidity of the entire measurement frame during the measurement process, preventing any slight slippage, and ensuring the stability of the measurement reference.

[0021] According to one embodiment of the present invention, the handle mounting bracket is connected to the second slide plate via a connecting bracket.

[0022] According to one embodiment of the present invention, the upper end of the lifting frame is connected to the side wall of the floating slide plate.

[0023] The connecting frame ensures the stability of the connection between the handle mounting bracket and the second slide plate, providing a fulcrum for the operating lever. The lifting frame is directly connected to the side wall of the floating slide plate, allowing the rotation angle of the lever to provide left and right movement of the floating slide plate, ensuring the reliability and effectiveness of state switching.

[0024] According to one embodiment of the present invention, mounting supports are connected to the lower surface of the base plate near both ends, and mounting rods are connected to the lower ends of the mounting supports.

[0025] The mounting supports and rods raise the entire working plane of the instrument, placing it at a more comfortable operating height for easier observation and operation.

[0026] The beneficial effects of this utility model are:

[0027] The integrated lifting components and scale pointer reading structure replace the cumbersome gauge block elevation method, enabling quick and accurate setting of the gear center height and significantly reducing measurement preparation time.

[0028] The T-shaped lead screw, vertical slide rail, and horizontal guide rail ensure the linearity and smoothness of the movement from a mechanical structure perspective, while the clamp provides absolute locking to ensure measurement accuracy.

[0029] The force measuring component and the floating slide are designed to ensure that a completely consistent constant measuring force is applied for each measurement, thus guaranteeing a high degree of consistency in the measurement results.

[0030] The switching components make it easy and quick to switch gear installation and measurement states;

[0031] The instrument integrates functions such as height adjustment, coarse spacing adjustment, constant force measurement, and precision reading into one unit, significantly reducing the reliance on operator skills and experience. Through adjustment, it can also adapt to the measurement of M-values ​​of various gears of different sizes and modules, making it widely applicable. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is a schematic diagram of the structure of this utility model.

[0034] Figure 2 This is a structural schematic diagram of the lifting component in this utility model.

[0035] Figure 3 This is a schematic diagram of the horizontal component in this utility model.

[0036] Figure 4 This is a schematic diagram of the structure of the first sliding member in this utility model.

[0037] Figure 5 This is a schematic diagram of the structure of the second sliding member in this utility model.

[0038] Figure 6 This is a schematic diagram of the switching component in this utility model.

[0039] Figure 7 This is a schematic diagram of the force measuring component in this utility model.

[0040] Figure 8 This is a schematic diagram of the structure of the floating measuring component in this utility model.

[0041] In the diagram: 1. Base plate; 2. Lifting assembly; 21. Vertical plate; 22. Lifting handwheel; 23. T-screw; 24. Vertical slide rail; 25. Slide plate; 26. Support plate; 27. Gear placement platform; 271. Groove; 28. Ruler; 29. ​​Pointer; 210. Stop; 3. Horizontal movement assembly; 31. Horizontal guide rail; 32. First sliding member; 321. First slide plate; 322. First clamp; 323. First probe mounting bracket; 33. Second sliding member; 331 332. Second slide plate; 333. Second clamp; 334. Second slide rail; 335. Floating slide plate; 336. Second probe mounting bracket; 4. Switching assembly; 41. Toggle handle; 42. Handle mounting bracket; 43. Rotating rod; 44. Lifting bracket; 45. Connecting bracket; 5. Mounting support; 6. Mounting rod; 7. Force measuring assembly; 71. Force measuring bracket; 72. Force measuring rod; 73. Compression spring; 8. Floating measuring component; 81. Micrometer; 82. Meter holder; 83. Floating measuring base. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0043] like Figure 1 As shown, a manual M-value measuring instrument includes a base plate 1 and a lifting assembly 2, a horizontal movement assembly 3, a switching assembly 4, a force measuring assembly 7, and a floating measuring unit 8 mounted on the base plate 1. Mounting supports 5 are connected to the lower surface of the base plate 1 near both ends, and mounting rods 6 are connected to the lower ends of the mounting supports 5. The base plate 1 serves as the foundation platform for the entire instrument, and is raised and stably supported by the mounting supports 5 and mounting rods 6 on its lower surface, providing a robust reference for high-precision measurements. The lifting assembly 2 is used to accurately and stably set the vertical position of the gear being measured, replacing the cumbersome and unstable operation of traditional measurements that requires assembling gauge blocks for elevation. The horizontal movement assembly 3 carries the two measuring heads and enables their horizontal movement, centering, and locking, adapting to gears of different sizes and performing measurement positioning. The switching assembly 4 controls two working states of the floating measuring unit: one is by overcoming the pressure of the compression spring and moving to the right, facilitating the placement and removal of the gear; the other is by releasing it to a floating state for constant force measurement. The force measuring component 7 provides a constant, adjustable measuring force for the measurement process, ensuring that each measurement is performed under the same mechanical conditions, thereby guaranteeing the repeatability and accuracy of the measurement results. The floating measuring component 8 accurately converts and displays the minute displacement of the measuring head, and its reading is the final M-value measurement result.

[0044] like Figure 2As shown, the lifting assembly 2 includes a vertical plate 21, a lifting handwheel 22, a T-shaped lead screw 23, a vertical slide rail 24, a sliding plate 25, and a support plate 26. The vertical plate 21 is fixed to the rear edge of the base plate 1. The lifting handwheel 22 is installed on the top of the vertical plate 21 and connected to the T-shaped lead screw 23. The vertical slide rail 24 is connected to the vertical plate 21. The sliding plate 25 is connected to the lead screw nut on the T-shaped lead screw 23 and is slidably connected to the vertical slide rail 24 via a slider. The support plate 26 is connected to the sliding plate 25 and is perpendicular to the sliding plate 25. The support plate 26 is connected to a gear placement platform 27, which has an I-shaped structure and slots 271 on both sides. A scale 28 is provided on the side wall of the vertical plate 21, and a pointer 29 pointing to the scale 28 is connected to the side wall of the sliding plate 25. A stop block 210 is connected to the gear placement platform 27, and the cross-section of the stop block 210 is E-shaped.

[0045] The rotating lifting handwheel 22 drives the T-shaped lead screw 23 to rotate. The lead screw nut meshing with the T-shaped lead screw 23 drives the slide plate 25 to move vertically up and down along the vertical slide rail 24. The support plate 26 moves accordingly, thereby precisely adjusting the height of the gear placement platform 27 above it. The scale 28 and pointer 29 work together to accurately read the height value, ensuring that the gear center is quickly and accurately set to the theoretical pitch circle height, that is, adjusting the rotation center of the gear to be on the same horizontal line as the centers of the two measuring heads of the measuring instrument. The stop block 210 is used for radial positioning and limiting of the gear. Its design ensures that the radial position of the gear remains unchanged during the measurement process, thereby improving the accuracy and repeatability of the measurement.

[0046] like Figure 3 As shown, the horizontal moving assembly 3 includes a horizontal guide rail 31 and a first sliding member 32 and a second sliding member 33 slidably disposed on the horizontal guide rail 31, as follows: Figure 4 As shown, the first sliding member 32 includes a first sliding plate 321, a first clamp 322, and a first probe mounting bracket 323 mounted on the first sliding plate 321. The first sliding plate 321 is slidably mounted on the horizontal guide rail 31 by a slider. The first clamp 322 is also mounted on the horizontal guide rail 31 and is connected to the bottom surface of the first sliding plate 321.

[0047] like Figure 5 As shown, the second sliding member 33 includes a second sliding plate 331, a second clamp 332, a second slide rail 333, a floating sliding plate 334, and a second probe mounting bracket 335. The second sliding plate 331 is slidably mounted on the horizontal guide rail 31 by a slider. The second clamp 332 is also mounted on the horizontal guide rail 31 and connected to the bottom surface of the second sliding plate 331. The second slide rail 333 is mounted on the second sliding plate 331. The floating sliding plate 334 is slidably mounted on the second slide rail 333 by a slider. The second probe mounting bracket 335 is mounted on the floating sliding plate 334.

[0048] The first sliding member 32 and the second sliding member 33 can slide independently on the horizontal guide rail 31 to coarsely adjust the distance between the two measuring heads to accommodate gears with different tooth widths. After adjustment, the first clamp 322 and the second clamp 332 are tightened respectively to lock the first slide plate 321 and the second slide plate 331 onto the horizontal guide rail 31, forming a rigid measuring frame. The floating slide plate 334 of the second sliding member 33 can slide within a small range along the second slide rail 333. When the measuring head mounted on it contacts the gear, it can overcome the elastic force of the force measuring component 7 and retract, achieving buffering and constant force contact.

[0049] like Figure 6 As shown, the switching assembly 4 includes a toggle handle 41, a handle mounting bracket 42, a rotating rod 43, and a lifting bracket 44. The handle mounting bracket 42 is connected to the second slide plate 331 via a connecting bracket 45. The toggle handle 41 is mounted on the handle mounting bracket 42 and its rotating shaft is connected to one end of the rotating rod 43. The other end of the rotating rod 43 is connected to the lifting bracket 44. The upper end of the lifting bracket 44 is connected to the side wall of the floating slide plate 334.

[0050] When the lever 41 is pulled back, its shaft drives the rotating rod 43 to rotate. The other end of the rotating rod 43 lifts the lifting frame 44 upward. The lifting frame 44 is connected to the side wall of the floating slide plate 334, thereby pushing the entire floating slide plate 334 to the right, overcoming the elastic force of the compression spring 73, and thus causing the measuring head to leave the measuring point. At this time, the gear can be installed or removed. After releasing the lever 41, the floating slide plate 334 returns to its original position under the action of the force measuring component 7, entering the floating measurement state.

[0051] like Figure 7 As shown, the force measuring component 7 includes a force measuring bracket 71, a force measuring rod 72, and a compression spring 73. The force measuring bracket 71 is connected to the outer edge of the second slide plate 331. The force measuring rod 72 passes through the force measuring bracket 71 and one end extends into the floating slide plate 334. The compression spring 73 is sleeved on the force measuring rod 72.

[0052] The compression spring 73 continuously applies pressure to the force measuring rod 72, one end of which rests against the floating slide plate 334. The elastic force is ultimately transmitted to the measuring head through the floating slide plate 334, providing a constant and stable measuring force. When the measuring head contacts the gear tooth surface, the reaction force of the tooth surface on the measuring head pushes the floating slide plate 334 backward and compresses the compression spring 73. The measurement is completed in this dynamic equilibrium, ensuring the consistency of the measuring force.

[0053] like Figure 8 As shown, the floating measuring component 8 includes a micrometer 81, a measuring instrument frame 82, and a floating measuring seat 83. The measuring instrument frame 82 is connected to the outer end of the second sliding plate 331. The measuring rod of the micrometer 81 passes through the measuring instrument frame 82 and extends into the floating measuring seat 83. The floating measuring seat 83 is connected to the floating sliding plate 334.

[0054] The measuring rod of the micrometer 81 rests inside the floating measuring seat 83, which is connected to the floating slide plate 334. Any tiny displacement of the floating slide plate 334 during the measurement process will be directly transmitted to the measuring rod of the micrometer 81. The micrometer 81 will accurately amplify and display this displacement, and the value read by the operator on the micrometer 81 is the M value of the gear.

[0055] Specific working process: Place the gear on the gear placement platform 27. According to the gear parameters, rotate the lifting handwheel 22 and use the scale 28 and pointer 29 to precisely adjust the gear center to the pitch circle height. Manually move the first sliding member 32 and the second sliding member 33 to coarsely adjust the distance between the two probes so that the measuring head is roughly aligned with the gear tooth groove. Tighten the first clamp 322 and the second clamp 332 to lock them. Move the toggle handle 41 of the switching component 4 backward to push the floating slide plate 334 to the right through leverage, so that the measuring head is away from a certain distance. Place the gear in the appropriate position on the gear placement platform 27. Release the toggle handle 41. The floating slide plate 334 is reset under the action of the compression spring 73 of the force measuring component 7. The measuring head contacts the gear tooth surface under a constant measuring force. Gently rotate the gear to make the two probes fully contact the two sides of the tooth groove. After the pointer of the micrometer 81 of the floating measuring component 8 stabilizes, read the value it displays. This is the M value of the gear. After the measurement is completed, turn the lever 41 again to lift and lock the floating slide plate 334, move the measuring head to the right, and remove the gear that has been measured.

[0056] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A M-value manual measuring instrument, characterized by: It includes a base plate (1) and a lifting assembly (2), a horizontal moving assembly (3) and a switching assembly (4) mounted on the base plate (1). The lifting assembly (2) includes a vertical plate (21), a lifting handwheel (22), a T-shaped screw (23), a vertical slide rail (24), a sliding plate (25), and a support plate (26). The vertical plate (21) is fixed to the rear edge of the base plate (1). The lifting handwheel (22) is installed on the top of the vertical plate (21) and connected to the T-shaped screw (23). The vertical slide rail (24) is connected to the vertical plate (21). The sliding plate (25) is connected to the screw nut and is slidably connected to the vertical slide rail (24). The support plate (26) is connected to the sliding plate (25) and is set perpendicular to the sliding plate (25). The horizontal moving component (3) includes a horizontal guide rail (31) and a first sliding member (32) and a second sliding member (33) slidably disposed on the horizontal guide rail (31). The first sliding member (32) includes a first sliding plate (321) and a first probe mounting bracket (323) mounted on the first sliding plate (321). The second sliding member (33) includes a second sliding plate (331), a second slide rail (333), a floating sliding plate (334), and a second probe mounting bracket (335). The second slide rail (333) is mounted on the second sliding plate (331), the floating sliding plate (334) is slidably disposed on the second slide rail (333), and the second probe mounting bracket (335) is mounted on the floating sliding plate (334). The switching assembly (4) includes a toggle handle (41), a handle mounting bracket (42), a rotating rod (43), and a lifting bracket (44). The handle mounting bracket (42) is connected to the second slide plate (331). The toggle handle (41) is mounted on the handle mounting bracket (42) and its rotating shaft is connected to one end of the rotating rod (43). The other end of the rotating rod (43) is connected to the lifting bracket (44), and the lifting bracket (44) is connected to the floating slide plate (334).

2. The M-value hand measurer of claim 1, wherein: The support plate (26) is connected to the gear placement platform (27), which has an I-shaped structure and slots (271) on both sides for the first probe mounting bracket (323) and the second probe mounting bracket (335) to enter; a stop block (210) is connected to the gear placement platform (27), and the cross-section of the stop block (210) is E-shaped.

3. The M-value hand-held meter of claim 1, wherein: The side wall of the upright plate (21) is provided with a scale (28), and the side wall of the sliding plate (25) is connected to a pointer (29) pointing to the scale (28).

4. The M-value hand-held meter of claim 1, wherein: It also includes a force measuring component (7), which includes a force measuring bracket (71), a force measuring rod (72) and a compression spring (73). The force measuring bracket (71) is connected to the outer edge of the second slide plate (331), the force measuring rod (72) passes through the force measuring bracket (71) and one end extends into the floating slide plate (334), and the compression spring (73) is sleeved on the force measuring rod (72).

5. The M-value hand-held meter of claim 1, wherein: It also includes a floating measuring component (8), which includes a micrometer (81), a measuring stand (82) and a floating measuring seat (83). The measuring stand (82) is connected to the outer end of the second sliding plate (331). The measuring rod of the micrometer (81) passes through the measuring stand (82) and extends into the floating measuring seat (83). The floating measuring seat (83) is connected to the floating sliding plate (334).

6. The M-value hand-held meter of claim 1, wherein: The first sliding member (32) further includes a first clamp (322) disposed on the horizontal guide rail (31), the first clamp (322) being connected to the bottom surface of the first sliding plate (321).

7. The manual measuring instrument for the M-value according to claim 1, characterized in that: The second sliding member (33) also includes a second clamp (332) disposed on the horizontal guide rail (31), the second clamp (332) being connected to the bottom surface of the second sliding plate (331).

8. The M-value hand-held meter of claim 1, wherein: The handle mounting bracket (42) is connected to the second slide plate (331) via a connecting bracket (45).

9. The M-value hand-held meter of claim 1, wherein: The upper end of the lifting frame (44) is connected to the side wall of the floating slide plate (334).

10. The M-value hand-held meter of claim 1, wherein: The lower surface of the base plate (1) is connected to the mounting posts (5) near both ends, and the lower end of the mounting posts (5) is connected to the mounting rod (6).

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