Gear root strength testing device

Abstract

The utility model belongs to the part manufacturing technical field discloses a gear root strength testing arrangement. Among them including base, the base is installed with the fixed ring, the fixed ring is fixedly installed gear, still rotatory installation has the test column on the base, test column top is connected with the moment spanner, and the test column downside is connected with the test board, and the lateral projection of test board forms has test tooth, and test tooth is engaged with gear.

Description

Technical Field

[0001] This utility model relates to the field of parts manufacturing technology, and in particular to a gear root strength testing device. Background Technology

[0002] In gear manufacturing, selecting gears with appropriate strength grades according to different operating conditions is crucial to ensuring the reliability of the transmission system. During gear meshing and power transmission, the tooth root is one of the most stress-concentrated areas in the entire gear structure. Due to the abrupt change in geometry, a significant stress concentration effect occurs at this location, making it a weak point subjected to bending and contact stresses. Under long-term cyclic alternating loads, fatigue cracks are highly susceptible to initiation in the tooth root region, gradually propagating and ultimately leading to gear fracture failure. This fracture problem can cause equipment downtime at best, and at worst trigger a chain reaction of damage to the entire transmission system, resulting in significant economic losses and even safety hazards.

[0003] However, existing production and quality inspection systems lack effective devices for intuitive, online detection of the actual stress state at the gear root. Conventional testing methods primarily focus on measuring geometric and material parameters such as tooth profile accuracy and surface hardness, failing to directly reflect the dynamic stress distribution and true magnitude at the gear root under simulated operating conditions. This lack of testing capability makes it difficult to accurately assess whether the actual load-bearing strength at the gear root deviates from the design expectations. Consequently, there is a hidden risk of premature failure due to insufficient gear root strength before the product is finally delivered to the customer. Utility Model Content

[0004] The purpose of this invention is to provide a gear root strength testing device to solve the problem that the torque at the gear root position cannot be directly detected under the existing technology, which leads to quality defects in the gears delivered to users.

[0005] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a gear root strength testing device, including a base, a fixing ring installed on the base, a gear fixedly installed inside the fixing ring, a test column rotatably installed on the base, the top of the test column being connected to a torque wrench, a test platform connected to the lower side of the test column, and test teeth protruding from the side of the test platform, the test teeth meshing with the gear.

[0006] Preferably, the base has a fixing screw hole, and the fixing bolt passes through the fixing plate and is screwed into the fixing screw hole, and the fixing plate is pressed onto the gear.

[0007] Preferably, the top of the test post is rectangular, and the torque wrench is inserted into the upper side of the test post.

[0008] Preferably, a limiting plate is installed on the base, a through hole is provided on the limiting plate, the test column is inserted into the through hole, and the test stage is provided between the limiting plate and the base.

[0009] Preferably, the limiting plate has a limiting hole, and a limiting bolt is screwed into the limiting hole, and the limiting bolt is screwed onto the base.

[0010] Preferably, the fixing ring has a through hole, and a connecting bolt is screwed into the through hole, and the connecting bolt is screwed onto the base.

[0011] Preferably, the inner wall of the fixing ring has protrusions forming mating teeth, which engage with the gear.

[0012] Preferably, a mating ring is sleeved inside the fixing ring, and the fixing ring and the mating ring are connected by a limiting block. The mating teeth are formed by protrusions on the inner wall of the mating ring.

[0013] Preferably, a notch is formed on one side of the fixing ring, and the test platform overlaps within the notch.

[0014] Preferably, the fixing ring and the test platform are made of metal.

[0015] Beneficial effect: The gear is placed inside the fixed ring, and the torque wrench is attached to the test post. The required strength parameter for the root of the target gear is set on the torque wrench. Since the test tooth is connected to the gear, when the torque wrench is turned, a clicking sound is heard. The meshing strength between the test tooth and the gear is the strength parameter previously set on the torque wrench. At this time, if the root of the gear tooth is deformed or broken, the strength of the gear tooth root can be judged intuitively. Attached Figure Description

[0016] Figure 1 This is a main drawing of the gear root strength testing device of this utility model;

[0017] Figure 2 This is a drawing of the main body of the fixing plate of this utility model.

[0018] In the diagram: 1. Base; 11. Fixing screw hole; 2. Fixing ring; 21. Butt joint tooth; 22. Notch; 3. Test column; 4. Test platform; 5. Test tooth; 6. Fixing bolt; 7. Limiting plate; 8. Limiting bolt; 9. Connecting bolt; 10. Fixing plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0023] With existing technology, it is impossible to directly test the strength of the gear root, resulting in gears delivered to users failing to meet strength standards.

[0024] To solve the above problems, such as Figures 1 to 2 As shown, this utility model provides a gear root strength testing device, including a base 1, a fixing ring 2 installed on the base 1, a gear fixedly installed inside the fixing ring 2, a test column 3 rotatably installed on the base 1, the top of the test column 3 being connected to a torque wrench, a test platform 4 connected to the lower side of the test column 3, and a test tooth 5 protruding from the side of the test platform 4, which meshes with the gear.

[0025] The torque wrench in the gear root strength testing device of this utility model is a common torque wrench, which is existing technology and will not be described in detail here. By setting a target torque value on the torque wrench, the tightening strength of the lower part of the torque wrench can be adjusted. A test column 3 is connected to the lower side of the torque wrench. Test teeth 5 are set on the test platform 4 on the upper and lower sides of the test column 3. The test teeth 5 are inserted and meshed with the gear to be tested. The torque set by the torque wrench can be directly applied between the test teeth 5 and the gear to be tested. When the torque value is reached, the lower part of the torque wrench will make a clicking sound. At this time, observe the position where the test teeth 5 and the gear to be tested are in contact to see if there is any breakage, bending or crack on the root of the gear. If no breakage or crack is found, it means that the strength of the gear meets the requirements and can be delivered to the customer. The gear root strength testing device can determine the strength of the gear in advance before delivery to the customer, thus improving the delivery quality.

[0026] The base 1 has a fixing screw hole 11. The bolt passes through the fixing plate 10 and is screwed into the fixing screw hole 11. The fixing bolt 6 is screwed into the fixing screw hole 11. The fixing plate 10 is pressed onto the gear. The gear can be fixed by the fixing plate 10, which can be freely removed. The gear can be kept stable during the rotation of the torque wrench to prevent the gear from falling off and causing danger. The fixing bolt 6 makes it easy to disassemble the fixing plate 10.

[0027] The test column 3 of this utility model has a rectangular top. A torque wrench is inserted into the upper side of the test column 3. The torque wrench is locked in the top of the rectangular test column 3 and is limited by the rectangular structure, which drives the test column 3 and the test platform 4 to rotate, so that pressure can be generated between the test teeth 5 and the gear. The torque wrench can limit the pressure between the test teeth 5 and the gear.

[0028] A limiting plate 7 is installed on the base 1. A through hole is opened on the limiting plate 7, and a test column 3 is inserted into the through hole. A test platform 4 is set between the limiting plate 7 and the base 1. The working position of the test platform 4 can be limited by the limiting plate 7 and the base 1 to prevent the test platform 4 from flipping or falling out.

[0029] The limiting plate 7 has a limiting hole, and a limiting bolt 8 is screwed into the limiting hole. The limiting bolt 8 is screwed onto the base 1, and the limiting plate 7 is fixed by the limiting bolt 8. The limiting bolt 8 can simplify the steps of disassembling and assembling the limiting plate 7 and reduce the complexity of the parts.

[0030] The fixing ring 2 has a through hole, and a connecting bolt 9 is screwed into the through hole. The connecting bolt 9 is screwed onto the base 1. The connecting bolt 9 can fix and disassemble the fixing ring 2, which is convenient for subsequent maintenance and replacement.

[0031] The inner wall of the fixed ring 2 has protrusions forming mating teeth 21. The mating teeth 21 engage with the gear, and the gear can be fixed inside the fixed ring 2 to prevent the fixed ring 2 from rotating.

[0032] A mating ring is fitted inside the fixed ring 2. The fixed ring 2 and the mating ring are connected by a limiting block. The mating ring has protrusions on its inner wall to form mating teeth 21. By setting mating rings with different inner diameters, different inner diameter mating rings correspond to different gears, so that the gear root strength testing device can test gears of different diameters, making it more versatile.

[0033] A notch 22 is formed on one side of the fixed ring 2, and the test platform 4 is attached to the notch 22. The notch 22 allows the test tooth 5 to engage with the tooth tip on the gear, making it easier for the test tooth 5 to contact the gear.

[0034] The fixing ring 2 and the test platform 4 are made of metal, and their structural strength is much higher than that of the gear under test, thus preventing breakage during the test.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A gear root strength testing device, characterized in that, Includes a base (1), on which a fixing ring (2) is installed, and a gear is fixedly installed inside the fixing ring (2). A test column (3) is also rotatably installed on the base (1). The top of the test column (3) is connected to a torque wrench. A test platform (4) is connected to the lower side of the test column (3). A test tooth (5) is formed by a protrusion on the side of the test platform (4). The test tooth (5) meshes with the gear.

2. The gear root strength testing device according to claim 1, characterized in that, The base (1) has a fixing screw hole (11), and the fixing bolt (6) passes through the fixing plate (10) and is screwed into the fixing screw hole (11). The fixing plate (10) is pressed onto the gear.

3. The gear root strength testing device according to claim 1, characterized in that, The top of the test post (3) is rectangular, and the torque wrench is inserted into the upper side of the test post (3).

4. The gear root strength testing device according to claim 1, characterized in that, A limiting plate (7) is installed on the base (1). A through hole is provided on the limiting plate (7). The test column (3) is inserted into the through hole. The test platform (4) is provided between the limiting plate (7) and the base (1).

5. The gear root strength testing device according to claim 4, characterized in that, The limiting plate (7) has a limiting hole, and a limiting bolt (8) is screwed into the limiting hole. The limiting bolt (8) is screwed onto the base (1).

6. The gear root strength testing device according to claim 1, characterized in that, The fixing ring (2) has a through hole, and a connecting bolt (9) is screwed into the through hole. The connecting bolt (9) is screwed onto the base (1).

7. The gear root strength testing device according to claim 6, characterized in that, The inner wall of the fixing ring (2) has protrusions forming mating teeth (21), which are engaged with the gear.

8. The gear root strength testing device according to claim 7, characterized in that, The fixing ring (2) is fitted with a docking ring, and the fixing ring (2) and the docking ring are connected by a limiting block. The docking teeth (21) are formed on the inner wall of the docking ring.

9. The gear root strength testing device according to claim 1, characterized in that, A notch (22) is formed on one side of the fixing ring (2), and the test platform (4) overlaps in the notch (22).

10. The gear root strength testing device according to claim 1, characterized in that, The fixing ring (2) and the test platform (4) are made of metal.

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