Gear detection tool

Abstract

The utility model belongs to detection device technical field especially relates to a gear detection frock, include: base, support mechanism, fixedly set in the base top, cylindrical base body, rotation is connected in the support mechanism top, first detection mechanism, fixedly connected in the one end of cylindrical base body, and first detection mechanism is used for detecting the first tolerance of gear, second detection mechanism, fixedly connected in the other end of cylindrical base body, and second detection mechanism is used for detecting the second tolerance of gear, rotary positioning mechanism, fixedly connected in the middle part of the lateral wall of cylindrical base body, and rotary positioning mechanism is used for driving cylindrical base body and rotates around the top of support mechanism, and positions when cylindrical base body rotates to vertical state, the utility model can detect the positive tolerance and negative tolerance of gear radius.

Description

Technical Field

[0001] This utility model belongs to the field of testing device technology, and in particular relates to a gear testing fixture. Background Technology

[0002] In the field of precision engine manufacturing, gears, as core components for power transmission and coordinated motion, directly determine the performance, efficiency, and reliability of the entire powertrain based on the accuracy of their geometric dimensions. Among these, the machining accuracy of key dimensions such as the pitch circle radius and addendum circle radius is particularly important, as they directly affect the correct meshing of the gear pair, the smoothness of transmission, and the uniformity of load distribution. If the actual machined dimensions of the gear radius deviate from the design value, even micron-level errors will be drastically amplified under the high-speed, high-load operating environment of an engine, leading to a series of serious consequences, including but not limited to meshing impact, abnormal noise, increased vibration, decreased transmission efficiency, premature wear or pitting of the tooth surface due to localized stress concentration, and even catastrophic failures such as tooth breakage.

[0003] Therefore, in gear manufacturing, rigorous tolerance precision testing of the machined gear radius is an indispensable and crucial step in ensuring that it meets design specifications and achieves high-precision assembly within the engine. This testing process aims to verify whether the actual radius of each gear is within the preset tolerance range, thereby eliminating problems such as assembly interference, improper clearance, or poor meshing caused by dimensional deviations. It is a vital quality checkpoint connecting design and reality, controlling manufacturing quality, and guaranteeing the overall performance and long service life of the engine. Utility Model Content

[0004] The purpose of this invention is to provide a gear inspection fixture for inspecting the machining accuracy of gear radii.

[0005] To achieve the above objectives, this utility model provides the following solution: a gear inspection fixture, comprising: a base; a support mechanism fixedly disposed at the top of the base; a cylindrical base rotatably connected to the top of the support mechanism; a first inspection mechanism fixedly connected to one end of the cylindrical base, the first inspection mechanism being used to inspect a first tolerance of the gear; a second inspection mechanism fixedly connected to the other end of the cylindrical base, the second inspection mechanism being used to inspect a second tolerance of the gear; and a rotation positioning mechanism fixedly connected to the middle of the outer side wall of the cylindrical base, the rotation positioning mechanism being used to drive the cylindrical base to rotate around the top of the support mechanism and to position the cylindrical base when it rotates to a vertical position.

[0006] According to this utility model, a gear inspection fixture is provided, wherein the first tolerance is a positive tolerance of the gear radius, and the second tolerance is a negative tolerance of the gear radius.

[0007] According to this utility model, a gear inspection fixture is provided, wherein a connecting shaft is fixedly connected to the middle of the outer side wall of the cylindrical base, and the connecting shaft and the rotary positioning mechanism are symmetrically arranged on both sides of the cylindrical base. The cylindrical base is rotatably connected to the top of the support mechanism through the connecting shaft and the rotary positioning mechanism.

[0008] According to this utility model, a gear inspection fixture is provided. The rotary positioning mechanism includes a rotating shaft. One end of the rotating shaft is fixedly connected to the middle of the outer side wall of the cylindrical base. The rotating shaft rotates through the top of the support mechanism and the other end is fixedly connected to a rotating rod. The rotating rod is perpendicular to the rotating shaft. A magnetic positioning part is fixedly connected to the end of the rotating rod.

[0009] According to this utility model, a gear inspection fixture is provided, wherein the magnetic positioning part includes a first magnet and a second magnet, the first magnet and the second magnet are respectively fixedly connected to the two ends of the rotating rod, a support plate is fixedly connected to the top of the side wall of the support mechanism, a positioning magnet is fixedly connected to the top of the support plate, and the positioning magnet is magnetically connected to the first magnet and the second magnet.

[0010] According to this utility model, a gear inspection fixture is provided. The first inspection mechanism includes a first inspection column and a first positioning column. Both the first inspection column and the first positioning column are fixedly connected to the end face of the cylindrical base. The first inspection column is coaxially arranged with the cylindrical base. A gap is left between the first inspection column and the first positioning column, and the gap is adapted to the radius of the gear.

[0011] According to this utility model, a gear inspection fixture is provided. The second inspection mechanism includes a second inspection column and a second positioning column. Both the second inspection column and the second positioning column are fixedly connected to the end face of the cylindrical base. The second inspection column is coaxially arranged with the cylindrical base. A gap is left between the second inspection column and the second positioning column. The gap is adapted to the radius of the gear.

[0012] According to this utility model, a gear inspection fixture is provided, wherein the support mechanism includes two support rods, the bottom end of the support rods is fixedly connected to the top end of the base, the two support rods are vertically spaced apart, and the cylindrical base is rotatably connected between the top ends of the two support rods.

[0013] Compared with existing technologies, this invention has the following advantages and technical effects: The support mechanism of this invention firmly supports the cylindrical base on the top of the base, allowing it to rotate flexibly. Based on this, the device integrates two independent detection units: the first detection mechanism is specifically used to accurately evaluate the positive tolerance of the gear radius (i.e., whether the actual size exceeds the maximum limit size), while the second detection mechanism is specifically used to accurately evaluate the negative tolerance (i.e., whether the actual size is less than the minimum limit size). This separate design enables targeted measurement of the upper and lower limits of the tolerance zone, resulting in higher accuracy and clearer results. To further improve the automation and convenience of the inspection, this invention also includes a rotary positioning mechanism. This mechanism can drive the cylindrical base to rotate precisely on the support point and stably position it. Through rotation, the first and second detection mechanisms can alternately be positioned at the top working position, thereby completing the inspection of all items, greatly optimizing the operation process, improving inspection efficiency and reliability, and providing a solid guarantee for the subsequent perfect assembly of the gear. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0016] Figure 2 This is a front view of the present utility model.

[0017] The components are as follows: 1. Base; 2. Support rod; 3. Connecting shaft; 4. Rotating rod; 5. First magnet; 6. Support plate; 7. Second magnet; 8. Cylindrical base; 9. First detection column; 10. First positioning column; 11. Second detection column; 12. Second positioning column; 13. Rotating shaft; 14. Positioning magnet. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figures 1 to 2 As shown, this utility model provides a gear inspection fixture, including: a base 1; a support mechanism fixedly disposed at the top of the base 1; a cylindrical base 8 rotatably connected to the top of the support mechanism; a first inspection mechanism fixedly connected to one end of the cylindrical base 8, the first inspection mechanism being used to inspect the first tolerance of the gear; a second inspection mechanism fixedly connected to the other end of the cylindrical base 8, the second inspection mechanism being used to inspect the second tolerance of the gear; and a rotation positioning mechanism fixedly connected to the middle of the outer side wall of the cylindrical base 8, the rotation positioning mechanism being used to drive the cylindrical base 8 to rotate around the top of the support mechanism, and to position the cylindrical base 8 when it rotates to a vertical state.

[0021] Furthermore, the first tolerance is a positive tolerance of the gear radius, and the second tolerance is a negative tolerance of the gear radius.

[0022] Furthermore, a connecting shaft 3 is fixedly connected to the middle of the outer side wall of the cylindrical base 8. The connecting shaft 3 and the rotary positioning mechanism are symmetrically arranged on both sides of the cylindrical base 8. The cylindrical base 8 is rotatably connected to the top of the support mechanism through the connecting shaft 3 and the rotary positioning mechanism.

[0023] Furthermore, the rotary positioning mechanism includes a rotating shaft 13, one end of which is fixedly connected to the middle of the outer side wall of the cylindrical base 8. The rotating shaft 13 rotates through the top of the support mechanism and the other end is fixedly connected to a rotating rod 4. The rotating rod 4 is perpendicular to the rotating shaft 13, and a magnetic positioning part is fixedly connected to the end of the rotating rod 4.

[0024] Furthermore, the magnetic positioning part includes a first magnet 5 and a second magnet 7, which are respectively fixedly connected to the two ends of the rotating rod 4. A support plate 6 is fixedly connected to the top of the side wall of the support mechanism, and a positioning magnet 14 is fixedly connected to the top of the support plate 6. The positioning magnet 14 is magnetically connected to the first magnet 5 and the second magnet 7.

[0025] The inspector holds the rotating rod 4 to drive the cylindrical base 8 to rotate, rotating the first inspection mechanism to the inspection position directly above. At this time, the second magnet 7 and the positioning magnet 14 are magnetically attracted to position the first inspection mechanism in the inspection position. Then, the first inspection mechanism is used to inspect the positive tolerance of the gear radius. After the inspection is completed, the inspector holds the rotating rod 4 again to drive the cylindrical base 8 to rotate, rotating the second inspection mechanism to the inspection position directly above. At this time, the first magnet 5 and the positioning magnet 14 are magnetically attracted to position the second inspection mechanism in the inspection position. Then, the second inspection mechanism is used to inspect the negative tolerance of the gear radius.

[0026] Furthermore, the first detection mechanism includes a first detection column 9 and a first positioning column 10. Both the first detection column 9 and the first positioning column 10 are fixedly connected to the end face of the cylindrical base 8. The first detection column 9 is coaxially arranged with the cylindrical base 8, and a gap is left between the first detection column 9 and the first positioning column 10. The gap is adapted to the radius of the gear.

[0027] Furthermore, the second detection mechanism includes a second detection column 11 and a second positioning column 12. Both the second detection column 11 and the second positioning column 12 are fixedly connected to the end face of the cylindrical base 8. The second detection column 11 is coaxially arranged with the cylindrical base 8, and a gap is left between the second detection column 11 and the second positioning column 12. The gap is adapted to the radius of the gear.

[0028] The first detection column 9 and the second detection column 11 are made of non-metallic materials, such as nylon, to avoid wear on the gear teeth during the detection process.

[0029] Furthermore, the support mechanism includes two support rods 2, the bottom end of which is fixedly connected to the top end of the base 1. The two support rods 2 are vertically spaced apart, and the cylindrical base 8 is rotatably connected between the top ends of the two support rods 2.

[0030] The working process of this utility model is as follows: The detection accuracy of the gear radius is 0.001. When both detection mechanisms pass, the product is considered qualified. If one detection mechanism fails, the product is considered unqualified. The allowable error range for the detection radius is ±0.02, for example, 5 ± 0.02 mm. The first detection post 9 and the first positioning post 10 are used to detect the positive tolerance (go gauge), which is 5.02 mm. The distance between the edge of the first detection post 9 and the center of the first positioning post 10 can be set to 5.021 mm. After the gear is installed on the first positioning post 10, the gear is rotated, and it is observed whether there is any jamming between the gear teeth and the first detection post 9. If there is no jamming after one revolution, it means that the gear radius value is less than or equal to the maximum positive tolerance; the positive tolerance detection is qualified. If there is jamming, it means that the gear radius exceeds the positive tolerance, and the product is unqualified.

[0031] The second inspection post 11 and the second positioning post 12 are used to inspect the negative tolerance (no-go gauge), which is 4.98 mm. The distance between the edge of the second inspection post 11 and the center of the second positioning post 12 can be set to 4.979 mm. If the gear teeth contact and jam with the second inspection post 11 and cannot rotate, it means that the gear radius is greater than or equal to the minimum negative tolerance, and the negative tolerance inspection is qualified. When inspecting each gear tooth, if it can rotate, it means that the size is less than the gear negative tolerance, and it is a defective product.

[0032] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements to the technical solutions of the present utility model made by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A gear inspection fixture, characterized in that, include: Base (1); The support mechanism is fixedly installed at the top of the base (1); The cylindrical base (8) is rotatably connected to the top of the support mechanism; The first inspection mechanism is fixedly connected to one end of the cylindrical base (8). The first inspection mechanism is used to inspect the first tolerance of the gear. The second inspection mechanism is fixedly connected to the other end of the cylindrical base (8). The second inspection mechanism is used to inspect the second tolerance of the gear. A rotary positioning mechanism is fixedly connected to the middle of the outer side wall of the cylindrical base (8). The rotary positioning mechanism is used to drive the cylindrical base (8) to rotate around the top of the support mechanism and to position the cylindrical base (8) when it rotates to a vertical position.

2. The gear inspection fixture according to claim 1, characterized in that, The first tolerance is a positive tolerance of the gear radius, and the second tolerance is a negative tolerance of the gear radius.

3. The gear inspection fixture according to claim 1, characterized in that, A connecting shaft (3) is fixedly connected to the middle of the outer side wall of the cylindrical base (8). The connecting shaft (3) and the rotary positioning mechanism are symmetrically arranged on both sides of the cylindrical base (8). The cylindrical base (8) is rotatably connected to the top of the support mechanism through the connecting shaft (3) and the rotary positioning mechanism.

4. The gear inspection fixture according to claim 1, characterized in that, The rotary positioning mechanism includes a rotating shaft (13), one end of which is fixedly connected to the middle of the outer side wall of the cylindrical base (8). The rotating shaft (13) rotates through the top of the support mechanism and the other end is fixedly connected to a rotating rod (4). The rotating rod (4) is perpendicular to the rotating shaft (13), and a magnetic positioning part is fixedly connected to the end of the rotating rod (4).

5. A gear inspection fixture according to claim 4, characterized in that, The magnetic positioning part includes a first magnet (5) and a second magnet (7). The first magnet (5) and the second magnet (7) are respectively fixedly connected to the two ends of the rotating rod (4). A support plate (6) is fixedly connected to the top of the side wall of the support mechanism. A positioning magnet (14) is fixedly connected to the top of the support plate (6). The positioning magnet (14) is magnetically connected to the first magnet (5) and the second magnet (7).

6. A gear inspection fixture according to claim 2, characterized in that, The first detection mechanism includes a first detection column (9) and a first positioning column (10). The first detection column (9) and the first positioning column (10) are both fixedly connected to the end face of the cylindrical base (8). The first detection column (9) is coaxially arranged with the cylindrical base (8). There is a gap between the first detection column (9) and the first positioning column (10). The gap is adapted to the radius of the gear.

7. A gear inspection fixture according to claim 2, characterized in that, The second detection mechanism includes a second detection column (11) and a second positioning column (12). The second detection column (11) and the second positioning column (12) are both fixedly connected to the end face of the cylindrical base (8). The second detection column (11) is coaxially arranged with the cylindrical base (8). There is a gap between the second detection column (11) and the second positioning column (12), and the gap is adapted to the radius of the gear.

8. A gear inspection fixture according to claim 1, characterized in that, The support mechanism includes two support rods (2), the bottom end of the support rods (2) is fixedly connected to the top end of the base (1), the two support rods (2) are vertically spaced apart, and the cylindrical base (8) is rotatably connected between the top ends of the two support rods (2).

Images