A device for measuring gears

Abstract

The utility model discloses a gear measurement special device relates to mechanical measurement technical field. The device includes main frame body, fixed subassembly and measurement subassembly. The main frame body is U type structure, and the upper side is opened with through slot. Fixed subassembly is by the plug -in board of installing on the main frame body and the top block constitutes, is used for clamping gear. Measurement subassembly includes the plug -in board two of fixed in the main frame body, and is installed in the plug -in board two with the rotation table measurer of fixed peg, and handle subassembly. Handle subassembly contains the connecting rod of handle rotary connection, the connecting rod of spring cover set and the measuring thimble of spherical end, and the connecting rod slidingly penetrates the table body. The utility model solves the problem of positioning unstable, complicated operation in traditional measurement through integrated design, has the advantages of reliable positioning, simple operation, high measuring accuracy, strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of measurement technology, specifically a special device for gear measurement. Background Technology

[0002] As a core component of mechanical transmission systems, the manufacturing precision of gears directly affects the performance, efficiency, noise, and service life of the entire transmission system. Therefore, precise measurement of key geometric parameters is essential during the manufacturing, assembly, and quality inspection of gears. Currently, general-purpose measuring tools or portable measuring instruments are commonly used for measuring small and medium-sized gears.

[0003] However, these methods have the following significant drawbacks:

[0004] 1. Poor positioning stability and low measurement accuracy: When using general-purpose measuring tools, gear positioning relies entirely on manual support from the operator, making it difficult to guarantee the stability of the gear axis and the consistency of the measurement reference during the measurement process. Especially when measuring parameters such as gear ring runout, even small positioning deviations can lead to significant measurement errors, affecting the accuracy of the results.

[0005] 2. Cumbersome operation and low efficiency: Each measurement requires manual adjustment of the gear position, alignment of the measuring head, and data reading, a tedious and time-consuming process. For situations requiring the measurement of multiple teeth or repeated measurements, the work efficiency is extremely low, making it difficult to meet the needs of rapid testing in production settings.

[0006] 3. Limited functionality and poor adaptability: General-purpose measuring tools often only measure a specific parameter. If different parameters such as tooth pitch or tooth profile need to be measured, different instruments or accessories need to be changed, increasing equipment costs and operational complexity. At the same time, general-purpose measuring tools have poor adaptability to gears of different sizes and modules, requiring frequent adjustments or changes of fixtures.

[0007] 4. Significant impact of human error: The reliability of measurement results is highly dependent on the skill level and experience of the operators. Human factors such as reading errors, centering errors, and improper control of measuring force can directly introduce measurement uncertainty, resulting in poor repeatability and comparability of measurement data.

[0008] 5. Lack of integration and specialization: Existing measurement methods often involve dispersing and operating gears, gauges, and reference platforms, lacking a dedicated device that integrates functions such as gear positioning, measurement execution, and data display. This non-integrated approach not only occupies space but also increases the complexity of the measurement process and potential error points. Utility Model Content

[0009] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide a special device for gear measurement.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A gear measuring device includes a main frame, a fixing component, and a measuring component. The main frame serves as the supporting foundation for the entire device, and a fixing component for clamping and fixing gears is connected to one side of its upper end face. The measuring component is connected to the side of the upper end face of the main frame away from the fixing component. The measuring component includes a second insert plate, a dial indicator, and a handle assembly. The second insert plate is fixedly connected to the main frame, specifically fixed to one side of the upper end face of the main frame. The dial indicator is connected above the second insert plate. The handle assembly is connected to both the second insert plate and the dial indicator, and is used to operate the measuring action and transmit displacement to the dial indicator.

[0012] Furthermore, the dial gauge includes a gauge body and a fixing bolt. The gauge body is positioned above the front side of the second insertion plate. The fixing bolt penetrates the side of the gauge body and is threaded onto the second insertion plate, used to securely fix the gauge body to the second insertion plate.

[0013] Furthermore, the grip assembly includes a grip, a connecting rod, a ring, a spring, and a measuring pin. The connecting rod is rotatably connected to the upper end of the grip. The connecting rod is slidably connected to the watch body. The ring is fixedly connected to the connecting rod. The spring is sleeved on the connecting rod, with one end of the spring fixedly connected to the ring. The measuring pin is fixedly connected to the end of the connecting rod away from the grip. By pressing or releasing the grip, the connecting rod and the measuring pin can slide relative to the watch body; the spring provides a restoring force and helps maintain a stable measuring contact force.

[0014] Furthermore, the fixing assembly includes a first insert plate and a top block. The first insert plate is fixedly connected to one side of the upper end face of the main frame. The top block is fixedly connected to the side of the upper end face of the main frame away from the measuring component. The gear can be placed between the first insert plate and the top block and fixed by a suitable clamping mechanism.

[0015] Furthermore, the main frame is designed with a U-shaped structure to provide stable support and necessary operating space. A through slot is provided on one side of the upper part of the main frame.

[0016] Furthermore, the end of the measuring pin is spherical, which is conducive to forming a good and stable point contact with the tooth surface of the gear or the measuring part, reducing contact error and making it suitable for measuring complex tooth surface profiles.

[0017] Furthermore, the width of the through groove is adapted to the diameter of the measuring pin, ensuring that the measuring pin can move smoothly and pass through in the vertical direction, while avoiding excessive gaps that could cause shaking, thus adapting to the measurement of gears of different sizes and ensuring measurement accuracy.

[0018] The advantages of this invention compared to existing technologies are as follows:

[0019] 1. High integration and specialization: The functions of gear fixing, measurement execution, and data display are integrated into a compact main frame, forming a dedicated platform for gear measurement, avoiding the inconvenience and errors caused by scattered measurements.

[0020] 2. Stable and reliable positioning: The gear is effectively clamped by the fixing component, which ensures the stability of the gear axis during the measurement process and provides a reliable benchmark for accurate measurement.

[0021] 3. Easy to operate and highly efficient: The handle assembly is designed in accordance with ergonomics, allowing the operator to complete the contact of the measurement point and data reading with simple pressing and releasing actions, which significantly simplifies the operation process and improves measurement efficiency.

[0022] 4. High Measurement Accuracy: The dial indicator itself possesses high precision. Combined with stable gear positioning and precise guidance from the measuring pin, it effectively reduces human and systematic errors. The spring mechanism helps maintain a constant measuring force, further ensuring the accuracy of the measurement results.

[0023] 5. High adaptability: The through-slot design on the main frame and the stroke of the measuring pin enable the device to adapt to the measurement needs of different gears within a certain size range. The spherical end of the measuring pin also enhances its adaptability to different tooth profiles. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the present invention. Figure 1 ;

[0025] Figure 2 This is a three-dimensional schematic diagram of the present invention. Figure 2 ;

[0026] Figure 3 This is a three-dimensional schematic diagram of the measuring component of this utility model. Figure 1 ;

[0027] Figure 4 This is a three-dimensional schematic diagram of the measuring component of this utility model. Figure 2 ;

[0028] Figure 5 This is a three-dimensional schematic diagram of the fixing component of this utility model;

[0029] Figure 6 This is a three-dimensional schematic diagram of the grip assembly of this utility model.

[0030] As shown in the figure: 1. Main frame; 101. Through groove; 2. Fixing assembly; 201. Insert plate one; 202. Top block; 3. Measuring assembly; 301. Insert plate two; 302. Dial gauge; 3021. Dial body; 3022. Fixing bolt; 303. Handle assembly; 3031. Handle; 3032. Connecting rod; 3033. Ring; 3034. Spring; 3035. Measuring pin. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0032] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0033] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figures 1 to 6 As shown, the gear measuring device provided by this utility model mainly includes a main frame 1, a fixing component 2, and a measuring component 3. All components work together to provide a stable positioning platform for the gear and achieve accurate measurement.

[0035] (a) Main frame 1

[0036] The main frame 1 serves as the supporting foundation and structural skeleton of the entire device, and is made of high-strength cast iron or high-quality aluminum alloy through casting or precision machining. Cast iron offers excellent rigidity and shock absorption, effectively suppressing vibrations during measurement and ensuring measurement stability; aluminum alloy, on the other hand, is lightweight and easy to move. The main frame 1 is designed with a U-shaped structure. This structure provides sufficient supporting rigidity while offering operators a spacious operating area for easy observation and gear assembly / disassembly. The open side of the U-shape typically faces the operator.

[0037] A through groove 101 is provided on one side above the main frame 1. The through groove 101 is an arc-shaped slot, and its length direction is approximately parallel to the longitudinal direction of the main frame 1. The width of the through groove 101 is precisely calculated and machined to form a precise sliding fit with the diameter of the measuring pin 3035.

[0038] (ii) Fixing component 2

[0039] The fixing component 2 is used to reliably clamp the gear 4 to be measured, ensuring that its position remains fixed during the measurement process and establishing a stable measurement reference. The fixing component 2 includes a insertion plate 201 and a top block 202.

[0040] Insert plate 201 is fixedly connected to one side of the upper end face of the main frame 1 by bolts. Insert plate 201 is usually a square plate structure, and its side facing the inside of the device can serve as an axial positioning reference surface for the gear. This side requires high flatness and perpendicularity, and is usually ground to ensure accuracy.

[0041] The top block 202 is bolted to the upper end face of the main frame 1, away from the measuring component 3. The top block 202 is positioned opposite the insert plate 201, forming a space between them for placing the gear. The gear-facing side of the top block 202 also needs to maintain high flatness and perpendicularity. In practical applications, standard threaded holes or mounting slots can be provided on the insert plate 201 and the top block 202 for installing additional clamping elements, such as quick clamps or screw plates, to securely press the gear 4 between the insert plate 201 and the top block 202, or to fix it in a designated position on the main frame 1. The core design of the fixing component 2 is to provide a defined and repeatable positioning reference for the gear.

[0042] (III) Measurement Component 3

[0043] The measuring component 3 is the core part that performs the measurement function. It is responsible for contacting the measured part of the gear and transmitting the displacement to the indicating device. The measuring component 3 includes a second insert plate 301, a dial indicator 302, and a handle assembly 303.

[0044] 1. Insert Plate 2 301: Insert Plate 2 301 is fixedly connected to the upper end face of the main frame 1 near the operator by bolts. As the mounting base for the dial indicator 302 and the handle assembly 303, Insert Plate 2 301 should have sufficient rigidity to prevent deformation under measurement stress. The upper surface of Insert Plate 2 301 is typically machined with precision mounting planes and threaded holes for mounting the dial indicator 302.

[0045] 2. Dial gauge 302: The dial gauge 302 uses a high-precision mechanical indicator, such as a micrometer or dial indicator, which includes a gauge body 3021 and a fixing bolt 3022.

[0046] Meter body 3021: Meter body 3021 contains a precision gear amplification mechanism or lever mechanism that converts the minute linear displacement of the measuring rod into the angular displacement of the pointer on the dial, thereby providing a reading. Meter body 3021 is placed in a preset mounting position above insert plate 301 through the mounting hole on its back. The axis of the measuring rod of meter body 3021 is preferably adjusted to be parallel to the direction of movement of measuring pin 3035.

[0047] Fixing bolt 3022: Fixing bolt 3022 is a specially designed set screw. It penetrates the mounting hole on the side wall of the meter body 3021 and is threaded into the corresponding threaded hole on the insert plate 301. Tightening the fixing bolt 3022 will firmly fix the meter body 3021 to the insert plate 301, preventing displacement during measurement. The tightening force of the fixing bolt 3022 should be moderate, ensuring reliable fixation without damaging the meter body 3021.

[0048] 3. Grip assembly 303: The grip assembly 303 is the part directly controlled by the operator and is used to drive the measuring pin contact gear 3035. It includes a grip 3031, a connecting rod 3032, a ring 3033, a spring 3034, and a measuring pin 3035.

[0049] Grip 3031: The grip 3031 is designed in a shape that is easy to hold, and the surface can be enhanced with anti-slip texture. The upper end of the grip 3031 is rotatably connected to the connecting rod 3032 via a pin, which allows the operator to apply force comfortably without generating additional torsional torque on the connecting rod 3032.

[0050] Connecting rod 3032: Connecting rod 3032 is the force transmission component. One end is rotatably connected to the handle 3031, and the other end is fixed to the measuring pin 3035. The middle part of connecting rod 3032 passes through the dial indicator body 3021 of the dial indicator 302 and is clearance-fitted with it to form a sliding connection. This ensures that connecting rod 3032 can only move linearly along its axis, and the direction of movement is stable. The straightness and surface finish of connecting rod 3032 are required to be high.

[0051] Ring 3033: Ring 3033 is fixedly sleeved on connecting rod 3032 and can be fixed by interference fit. Its position is on a section of connecting rod 3032 inside or outside the watch body 3021. Ring 3033 serves as a support for spring 3034.

[0052] Spring 3034: Spring 3034 is sleeved on connecting rod 3032, with one end abutting against ring 3033 and the other end abutting against the dial body 3021. When the operator pulls or presses the handle 3031 away from the gear, connecting rod 3032 moves measuring pin 3035, compressing or stretching spring 3034. When the operator releases handle 3031, the restoring force of spring 3034 pushes connecting rod 3032 and measuring pin 3035 back to their initial position or maintains stable contact with the gear. The function of spring 3034 is to provide a restoring force and help maintain a relatively constant measuring force during contact measurement, which is crucial for obtaining consistent measurement results. The magnitude of the measuring force can be adjusted by selecting different specifications of spring 3034 or adjusting the pre-compression of spring 3034.

[0053] Measuring pin 3035: The measuring pin 3035 is fixedly connected to the end of the connecting rod 3032 away from the handle 3031, via a threaded connection or a precision chuck. The measuring pin 3035 is the component that directly contacts the part of the gear being measured. Its end is machined into a spherical shape. The advantage of the spherical end is that it makes point contact with the gear tooth surface, reducing contact deformation errors and better adapting to changes in tooth surface curvature, avoiding scratches or measurement dead spots caused by sharp corners. The measuring pin 3035 is usually made of cemented carbide, which has high hardness and good wear resistance to extend its service life. The diameter of the ball head of the measuring pin 3035 needs to be selected according to factors such as the gear module to ensure that the contact point is within the effective measurement area of ​​the tooth surface.

[0054] Example 1:

[0055] Working principle and measurement process

[0056] 1. Device Preparation and Gear Clamping: Place the device on a stable workbench. Clean the positioning surfaces of the main frame 1, the fixing component 2, and the reference hole or end face of the gear to be measured. Select a suitable measuring pin 3035 and install it onto the connecting rod 3032. Place the gear 4 on the main frame 1, ensuring its reference hole or end face aligns with the positioning surfaces of the insert plate 201 and the top block 202 of the fixing component 2. Gently clamp the gear using an appropriate clamping mechanism to ensure it does not move or rotate during measurement. However, be careful not to apply excessive clamping force to avoid gear deformation.

[0057] 2. Measurement Component Adjustment and Zeroing: Adjust the overall height of the measurement component 3 or select the extension length of the measuring pin 3035 according to the size of the gear, so that the spherical end of the measuring pin 3035 can smoothly contact the predetermined measurement part of the gear. Operate the handle 3031 by hand to slowly bring the measuring pin 3035 into contact with a tooth surface of the gear. Observe the dial of the dial indicator 302. When the pointer starts to rotate, continue operating gently until the pointer rotates through a certain angle, then tighten the fixing bolt 3022 of the dial indicator 302. At this time, the dial can be rotated to align the pointer with the zero position, completing the zeroing operation before measurement. The spring 3034 provides a stable contact force during this process.

[0058] 3. Perform the measurement:

[0059] Tooth pitch measurement: With the reference tooth reading as zero, operate the handle 3031 to slightly move the measuring pin 3035 away from the tooth surface. Then, rotate the gear by one tooth pitch angle, aligning the measuring pin 3035 with the same measurement position for the next tooth. Operate the handle 3031 again to bring the measuring pin 3035 into contact with the tooth surface, maintaining a similar spring force as during the reference tooth measurement, and read the reading on the dial indicator 302. The difference between this reading and zero is the relative deviation of the tooth pitch. Repeat this process to measure the tooth pitch deviation for all teeth in one revolution.

[0060] Gear runout measurement: Adjust the measuring pin 3035 to a position that contacts the bottom of the tooth groove or the top of the tooth and zero it. Slowly and evenly rotate the gear one revolution while observing the change of the pointer of the dial indicator 302. The maximum swing range of the pointer is the gear runout value.

[0061] Data Recording and Reset: Record the readings at each measurement point. After measurement, loosen the gear clamp and remove the gear. Operate handle 3031 to reset the measuring pin 3035, preventing prolonged pressure from affecting spring performance and instrument accuracy. Clean all parts of the device for future use.

[0062] Example 2:

[0063] The dial indicator 302 can also be replaced with an electronic digital micrometer, and the data can be output to a computer for automatic recording and analysis, further improving measurement efficiency and data processing capabilities.

[0064] The fixed component 2 can be further modularized and designed to allow for the replacement of V-blocks, three-jaw chuck adapters, etc. of different specifications, in order to expand the range of types and sizes of measurable gears.

[0065] The transmission method of the grip assembly 303 can also be optimized by using levers, linkages, or other mechanisms to change the direction and magnitude of the operating force, making it more in line with the ergonomic requirements of specific measurement scenarios.

[0066] Wear-resistant bushings can be inlaid on the edge of the through groove 101 of the main frame 1 to improve guide life and accuracy.

[0067] It should be noted that additional clamping elements, such as quick clamps and screw clamps, are used for installation, although not shown in detail in the figure. These are common techniques in the field of mechanical clamping.

[0068] The detailed description of known functions and components is omitted in this disclosure. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of commercially available instruments. The circuit control part of this utility model is conventional technology in the field and will not be described in detail here.

[0069] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A special device for measuring gears, characterized in that, include: The main frame (1) has a fixing component (2) connected to one side of the upper end face of the main frame (1); A measuring component (3) is connected to the upper end face of the main frame (1) away from the fixing component (2). The measuring component (3) includes: Insert plate two (301), the insert plate two (301) is fixedly connected to the main frame (1), and the insert plate two (301) is fixedly connected to one side of the upper end face of the main frame (1); A dial gauge (302) is connected above the second insert plate (301); A grip assembly (303) is also connected to the dial gauge (302) of the insert plate (301).

2. The gear measuring device according to claim 1, characterized in that: The dial gauge (302) includes: The watch body (3021) is placed above the front side of the insert plate two (301); Fixing bolt (3022), which penetrates the side threaded connection of the body (3021) to the insert plate (301).

3. The gear measuring device according to claim 2, characterized in that: The grip assembly (303) includes: A grip (3031) is provided, with a connecting rod (3032) rotatably connected to the upper end of the grip (3031), and the connecting rod (3032) is slidably connected to the watch body (3021); A circular ring (3033) is fixedly connected to a connecting rod (3032); A spring (3034) is sleeved on a connecting rod (3032), and one end of the spring (3034) is fixedly connected to a ring (3033). A measuring pin (3035) is fixedly connected to the end of the connecting rod (3032) away from the handle (3031).

4. The gear measuring device according to claim 2, characterized in that: The fixing component (2) includes: Insert plate one (201), the insert plate one (201) is fixedly connected to one side of the upper end face of the main frame (1); Top block (202), which is fixedly connected to the upper end face of the main frame (1) away from the measuring component (3).

5. The gear measuring device according to claim 1, characterized in that: The main frame (1) is U-shaped, and a through groove (101) is opened on one side of the upper part of the main frame (1).

6. The gear measuring device according to claim 3, characterized in that: The end of the measuring pin (3035) is spherical and is used to contact the tooth surface of the gear or the measuring part.

7. A gear measuring device according to claim 5, characterized in that: The width of the through groove (101) is adapted to the diameter of the measuring pin (3035) to allow the measuring pin (3035) to move and pass through in the vertical direction, thereby accommodating the measurement of gears of different sizes.

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