A kind of auxiliary detection tool and method for outer gear ring of steel embedded aluminum composite motorcycle sprocket
Patent Information
- Application Number
- CN202610741844.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-27
- Publication Date
- 2026-08-18
AI Technical Summary
[0004]为克服现有技术的不足，本发明公开了一种钢嵌铝复合摩托车链轮外齿圈的辅助检测工装及方法，用于解决现有技术中无法区分钢嵌铝外齿圈失圆原因、无法精准判定产品在机尺寸合格性的问题
本发明通过专用辅助检测结构的设计，可对下机后产生失圆形变的钢嵌铝外齿圈进行精准定位、辅助支撑，能够有效规避形变对检测结果的干扰，帮助检测人员快速区分失圆成因，精准判定产品在机加工尺寸是否符合设计标准，从而解决现有常规检测手段无法实现的合格性判定问题，弥补现有检测工装的不足，适配生产成本控制前提下的产品检测需求，提升生产效率与质量管控水平。
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Figure CN122590780A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of sprocket quality testing equipment, specifically relating to an auxiliary testing fixture and method for the outer tooth ring of a steel-embedded aluminum composite motorcycle sprocket. Background Technology
[0002] Currently, steel-embedded aluminum motorcycle sprockets, as core components of motorcycle transmission systems, adopt a steel-embedded aluminum composite structure. The outer teeth are made of high-quality steel and are treated with high-frequency quenching to ensure wear resistance, while the inner parts are made of aerospace-grade aluminum alloy to achieve lightweighting. They combine the advantages of high strength and lightweighting, making them suitable for various road and off-road motorcycles and modified models, and meeting the development needs of the domestic motorcycle industry for efficient and lightweight parts.
[0003] However, due to limitations in production cost control, high-precision stress-relief processes and specialized machining fixtures are typically not available during the processing of this product. This results in severe out-of-roundness of the outer gear ring of the steel-embedded aluminum motorcycle sprocket after it leaves the machine due to factors such as residual stress release and uneven material stress. This type of out-of-roundness is an irregular deformation, which directly makes it impossible to accurately detect whether the product's on-machine dimensions meet the design standards through conventional testing methods. Consequently, it is impossible to determine the product's qualification, which not only affects production efficiency but also poses quality risks such as assembly difficulties, dimensional deviations, and transmission failures caused by non-compliant dimensions after the product leaves the factory. This has become a core pain point restricting the quality control and capacity improvement of this product, highlighting the urgent need to develop specialized auxiliary testing tooling. Summary of the Invention
[0004] To overcome the shortcomings of the prior art, this invention discloses an auxiliary inspection tooling and method for steel-inlaid aluminum composite motorcycle sprocket outer gear ring, which solves the problems in the prior art of being unable to distinguish the cause of steel-inlaid aluminum outer gear ring out of roundness and being unable to accurately determine the on-machine dimensional qualification of the product.
[0005] To achieve the above objectives, the technical solution of the present invention is as follows: An auxiliary inspection fixture for the outer gear ring of a steel-inlaid aluminum composite motorcycle sprocket includes a threaded rod, a movable seat screwed onto the threaded rod, a fixed block rotatably connected to the top of the threaded rod, guide rods evenly distributed around the fixed block and arranged horizontally, a slider slidably connected to the guide rod, and a force transmission rod connecting the bottom end of the slider and the side end of the movable seat. The two ends of the force transmission rod are respectively hinged to the slider and the movable seat. The threaded rod is connected to a drive mechanism. When the drive mechanism is activated, the threaded rod rotates, and the lifting and lowering of the movable seat drives several sliders to move synchronously outward or inward. The several sliders constitute an actuator for forced circular motion. A push block is provided at the top of the slider.
[0006] Preferably, both the movable seat and the fixed block are regular polyhedral structures with the same number of sides. The sides of the movable seat correspond one-to-one with the sides of the fixed block and face the same direction. Each side of the movable seat is provided with a first hinge seat, and the bottom end of the slider is provided with a second hinge seat. The two ends of the force transmission rod are respectively hinged to the first hinge seat and the second hinge seat. The central axis of the force transmission rod, the central axis of the threaded rod, and the central axis of the guide rod where the slider corresponding to the force transmission rod is located are coplanar.
[0007] Preferably, the outer end of the push block is an arc-shaped surface.
[0008] Preferably, the driving mechanism is a handle fixedly installed at the bottom end of the threaded rod.
[0009] A method for determining the cause of out-of-roundness of the outer gear ring of a steel-aluminum composite motorcycle sprocket is provided. This method utilizes the auxiliary inspection fixture for the outer gear ring of the steel-aluminum composite motorcycle sprocket as described above, and employs a forced rounding method for determination. The specific operation is as follows: Step 1: Obtain the standard diameter dimension one of the circular contour one of the external gear ring and the standard diameter dimension two of the circular contour two; Step 2: Using the external gear ring sample one, the circular contour one is forced into a complete circle by the auxiliary detection fixture: several push blocks push the circular contour one synchronously to restore it to the standard diameter size one; Step 3: Check if the diameter of circular contour two is the standard diameter size two. If it is, it means that the machining accuracy is not a problem, and the out-of-roundness is caused by residual stress from the tooth machining. If not, it means that the out-of-roundness of circular contour two is caused by machining. At this time, collect the diameter of circular contour two and the distance of circular contour two from the root of the external gear ring from multiple points. By comparing the difference between the diameter of circular contour two and the standard diameter size two, and the difference between the distance of circular contour two from the root of the external gear ring and the corresponding standard distance, analyze the problems of the machining equipment or operation method. Step 4: Using the second external gear ring sample, first use the same method as in step 2 to make the circular contour two round, so that it restores the standard diameter size two. Step 5: Check if the diameter of circular contour one is the standard diameter one. If it is, it means that the machining accuracy is not a problem, and the out-of-roundness is caused by residual stress from the tooth machining. If not, it means that the out-of-roundness of circular contour one is caused by machining. At this time, collect the diameter of circular contour one and the distance of circular contour one from the root of the external gear ring from multiple points. By comparing the difference between the diameter of circular contour one and the standard diameter one, and the difference between the distance of circular contour one from the root of the external gear ring and the corresponding standard distance, analyze the problems existing in the machining equipment or operation method.
[0010] The beneficial effects of the auxiliary inspection fixture and method for the outer gear ring of a steel-embedded aluminum composite motorcycle sprocket of the present invention are as follows: This invention, through the design of a dedicated auxiliary detection structure, can accurately position and provide auxiliary support for steel-embedded aluminum external gear rings that have undergone out-of-round deformation after machining. It can effectively avoid the interference of deformation on the detection results, help inspectors quickly distinguish the causes of out-of-roundness, and accurately determine whether the machined dimensions of the product meet the design standards. This solves the problem of conformity determination that cannot be achieved by existing conventional inspection methods, makes up for the deficiencies of existing inspection tooling, adapts to the product inspection needs under the premise of production cost control, and improves production efficiency and quality control level. Attached Figure Description
[0011] Figure 1 This is a partially enlarged schematic diagram of the inner edge boss one and boss two of the outer gear ring of the sprocket after machining. Figure 2 This is a schematic diagram of the cross-sectional structure at point BB; Figure 3 This is a schematic diagram of the cross-sectional structure at point CC; Figure 4 This is a schematic diagram of the tooling of the present invention.
[0012] 1. External gear ring; 11. Circular contour one; 12. Circular contour two; 13. Internal convex structure; 14. Connecting hole; 100. Threaded rod; 200. Guide rod; 300. Moving seat; 400. Force transmission rod; 500. Sliding block; 510. Push block; 600. Fixing block; 700. First hinge seat. Detailed Implementation
[0013] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
[0014] The structure of the steel-aluminum composite motorcycle sprocket outer gear ring 1 adapted to this invention is as follows: Figure 1 , 2As shown in Figure 3, the total thickness of the external gear ring is only 6mm. The inner edge of the external gear ring 1 and the adjacent position of the outer side of the inner edge are provided with boss one and boss two. The inner surface of boss one is a circular contour one 11 coaxial with the external gear ring 1. On the circular contour one 11, there are inner convex structures 13 formed by multiple arc contours evenly distributed. The inner convex structure 13 is provided with connecting holes 14 for assembly with other structures of the sprocket. The inner surface of boss two is a circular contour two 12 adjacent to the circular contour one 11 and coaxial with the external gear ring 1. The diameter of the circular contour two 12 is larger than that of the circular contour one 11. According to the design standard, the circular contour one 11 and the circular contour two 12 should not be deformed after processing, and the circular shape should be maintained to fully meet the needs of subsequent assembly. However, in actual production, after the machining processes of circular contour 11 and circular contour 22 are completed in the machining center, both circular contour 11 and circular contour 22 will show significant out-of-roundness when the product comes off the machine. This makes it impossible for the inspectors to distinguish the cause of the out-of-roundness problem, that is, they cannot distinguish whether the machining dimensions on the machining center itself are not up to standard, or whether the deformation is caused by the release of machining stress after the product comes off the machine (the teeth of this external gear ring are made of 45 steel material with high frequency quenching, and the residual stress after machining is large).
[0015] To address the aforementioned problems, this invention provides an auxiliary inspection fixture for the outer gear ring of a steel-embedded aluminum composite motorcycle sprocket, the specific implementation of which is as follows: Example
[0016] An auxiliary inspection fixture for the outer gear ring of a steel-embedded aluminum composite motorcycle sprocket, such as... Figure 4 As shown, it includes a threaded rod 100, a movable seat 300 screwed onto the threaded rod 100, a fixed block 600 rotatably connected to the top of the threaded rod 100, guide rods 200 evenly distributed around the fixed block and arranged horizontally, a slider 500 slidably connected to the guide rod 200, and a force transmission rod 400 connected between the bottom end of the slider 500 and the side end of the movable seat 300. The two ends of the force transmission rod 400 are respectively hinged to the slider 500 and the movable seat 300. The threaded rod 100 is connected to a driving mechanism. When the driving mechanism is activated, the threaded rod 100 rotates, and the lifting and lowering of the movable seat 300 drives several sliders 500 to move synchronously outward or inward. The several sliders 500 constitute an actuator for forced circular motion. A push block 510 is provided at the top of the slider 500.
[0017] like Figure 4As shown, both the movable seat 300 and the fixed block 600 are regular polyhedral structures with the same number of sides. The sides of the movable seat 300 correspond one-to-one with the sides of the fixed block 600 and face the same direction. Each side of the movable seat 300 is provided with a first hinge seat 700. The bottom end of the slider 500 is provided with a second hinge seat (same as the first hinge seat). The two ends of the force transmission rod 400 are respectively hinged to the first hinge seat 700 and the second hinge seat. The central axis of the force transmission rod 400, the central axis of the threaded rod 100, and the central axis of the guide rod 200 where the slider 500 is located are coplanar.
[0018] like Figure 4 As shown, the outer end of the push block 510 is an arc-shaped surface.
[0019] like Figure 4 As shown, the driving mechanism is a handle (a common component, not shown in the figure) that is fixedly installed at the bottom end of the threaded rod 100.
[0020] In this embodiment, as Figure 4 As shown, both the fixed block and the movable seat are preferably hexahedral structures. Due to the constraints of the first hinge seat (including two relatively parallel limiting plates, a rotating link and a hinge shaft between the two limiting plates, and one end of the force transmission rod rotatably connected to the hinge shaft) and the second hinge seat, as well as the transmission of the force transmission rod, the sides of the fixed block and the movable seat correspond one-to-one and face the same direction. When the circular contour 11 or the circular contour 2 12 is held in place by the six push blocks 510, the fixed block remains stationary relative to the external gear ring 1. As the threaded rod rotates, the six push blocks 510 simultaneously push the circular contour 11 or the circular contour 2 12, causing it to be forced to become round (meaning to restore the circle).
[0021] Understandably, when there are more than 6 or even more sides of the fixed block and the moving seat, the accuracy of the forced circular shape will be further improved, so there is no need to worry about secondary deformation of the circular contour 11 or the circular contour 22 due to excessive local pressure.
[0022] Example 2: Based on Example 1, this example provides a method to solve the problems in the prior art of being unable to distinguish the cause of out-of-roundness of steel-embedded aluminum external gear rings and being unable to accurately determine the dimensional conformity of products in operation, namely: A method for determining the cause of out-of-roundness of the outer gear ring of a steel-aluminum composite motorcycle sprocket is provided. This method utilizes the auxiliary inspection fixture for the outer gear ring of the steel-aluminum composite motorcycle sprocket as described above, and employs a forced rounding method for determination. The specific operation is as follows: Step 1: Obtain the standard diameter of the first circular profile 11 and the standard diameter of the second circular profile 12 of the external gear ring; the above data can be obtained from the design drawings. Step 2: Using the external gear ring sample one, the circular contour one 11 is forced into a complete circle by the auxiliary detection fixture: several push blocks 510 simultaneously push the circular contour one 11 to restore its standard diameter dimension one; the above method for determining the restored standard diameter dimension one can be measured at multiple points with vernier calipers; the same applies below; Step 3: Check if the diameter of circular contour 12 is the standard diameter. If it is, it indicates that the machining accuracy is fine, and the out-of-roundness is caused by residual stress from the tooth machining. This is because, during the tooling push-up process, if the out-of-roundness is caused by stress, when circular contour 11 overcomes the stress and restores to the standard diameter, circular contour 12 will also overcome the stress and restore to the standard diameter. If circular contour 12 cannot restore to the standard diameter, it means that the out-of-roundness of circular contour 12 is caused by machining. This is because, when circular contour 11 overcomes the stress and restores to the standard diameter, circular contour 12 will also... The diameter should have returned to standard diameter two after overcoming stress, but it did not, indicating a roundness problem caused by the machining process. At this point, multiple points were used to collect data on the diameter of circular contour two 12 and the distance between circular contour two 12 and the root of the external gear ring. By comparing the difference between the diameter of circular contour two 12 and standard diameter two, and the difference between the distance between circular contour two 12 and the root of the external gear ring and the corresponding standard distance (the distance between circular contour two and the corresponding root in the drawing), problems with the machining equipment or operating methods were analyzed. Common problems often manifest as: whether there are machining defects such as milling deviation, coaxiality deviation, or inaccurate positioning during the machining process. Step 4: In order to avoid the influence of Step 1-3 on the roundness of the external gear ring sample 1, this step uses external gear ring sample 2. First, the same method as in Step 2 is used to make the circular contour 12 round, so that it restores the standard diameter size 2. Step 5: Check if the diameter of circular contour 11 is the standard diameter. If it is, the machining accuracy is fine, and the out-of-roundness is caused by residual stress from the tooth machining. If not, the out-of-roundness of circular contour 11 is due to machining issues. At this point, collect data from multiple points on the diameter of circular contour 11 and the distance between circular contour 11 and the root of the external gear ring. By comparing the difference between the diameter of circular contour 11 and the standard diameter, and the difference between the distance between circular contour 11 and the root of the external gear ring and the set distance, analyze the problems with the machining equipment or operating methods. The principle is the same as above.
[0023] In summary, this invention addresses the core pain point of steel-embedded aluminum motorcycle sprocket outer gear rings becoming out of round after machining, yet the cause of this out-of-roundness cannot be detected. It designs a dedicated auxiliary inspection fixture that, through a forced rounding method, accurately distinguishes the causes of out-of-roundness and determines the conformity of the machined dimensions, effectively solving the product inspection problem under the premise of production cost control, and improving production efficiency and quality control. Furthermore, the fixture's structural design possesses good versatility, flexibly adapting to the auxiliary inspection of deformation of all similar thin-walled ring parts after machining, without requiring significant structural adjustments for different specifications of thin-walled ring parts. This expands the fixture's application range and reduces the research and development and manufacturing costs of subsequent similar product inspection fixtures, demonstrating strong practicality and promotional value.
Claims
1. An auxiliary inspection fixture for the outer gear ring of a steel-embedded aluminum composite motorcycle sprocket, characterized in that, The device includes a threaded rod, a movable seat screwed onto the threaded rod, a fixed block rotatably connected to the top of the threaded rod, guide rods evenly distributed around the fixed block and arranged horizontally, a slider slidably connected to the guide rods, and a force transmission rod connecting the bottom end of the slider and the side end of the movable seat. The two ends of the force transmission rod are respectively hinged to the slider and the movable seat. The threaded rod is connected to a drive mechanism. When the drive mechanism is activated, the threaded rod rotates, and the lifting and lowering of the movable seat drives several sliders to move synchronously outward or inward. The several sliders constitute an actuator that forces a complete circle. A push block is provided at the top of the slider.
2. The auxiliary inspection fixture for the outer gear ring of a steel-embedded aluminum composite motorcycle sprocket as described in claim 1, characterized in that, Both the movable seat and the fixed block are regular polyhedral structures with the same number of sides. The sides of the movable seat correspond one-to-one with the sides of the fixed block and face the same direction. Each side of the movable seat is provided with a first hinge seat, and the bottom end of the slider is provided with a second hinge seat. The two ends of the force transmission rod are respectively hinged to the first hinge seat and the second hinge seat. The central axis of the force transmission rod, the central axis of the threaded rod, and the central axis of the guide rod where the slider corresponding to the force transmission rod is located are coplanar.
3. The auxiliary inspection fixture for the outer gear ring of a steel-embedded aluminum composite motorcycle sprocket as described in claim 2, characterized in that, The outer end of the push block is an arc-shaped surface.
4. The auxiliary inspection fixture for the outer gear ring of a steel-embedded aluminum composite motorcycle sprocket as described in claim 3, characterized in that, The driving mechanism is a handle that is fixedly installed at the bottom end of the threaded rod.
5. A method for determining the cause of out-of-roundness of the outer gear ring of a steel-aluminum composite motorcycle sprocket, characterized in that, Using the auxiliary inspection fixture for the steel-aluminum composite motorcycle sprocket outer gear ring as described in claim 4, the forced rounding method is used for discrimination. The specific operation is as follows: Step 1: Obtain the standard diameter dimension one of the circular contour one of the external gear ring and the standard diameter dimension two of the circular contour two; Step 2: Using the external gear ring sample one, the circular contour one is forced into a complete circle by the auxiliary detection fixture: several push blocks push the circular contour one synchronously to restore it to the standard diameter size one; Step 3: Check if the diameter of circular contour two is the standard diameter size two. If it is, it means that the machining accuracy is not a problem, and the out-of-roundness is caused by residual stress from the tooth machining. If not, it means that the out-of-roundness of circular contour two is caused by machining. At this time, collect the diameter of circular contour two and the distance of circular contour two from the root of the external gear ring from multiple points. By comparing the difference between the diameter of circular contour two and the standard diameter size two, and the difference between the distance of circular contour two from the root of the external gear ring and the corresponding standard distance, analyze the problems of the machining equipment or operation method. Step 4: Using the second external gear ring sample, first use the same method as in step 2 to make the circular contour two round, so that it restores the standard diameter size two. Step 5: Check if the diameter of circular contour one is the standard diameter one. If it is, it means that the machining accuracy is not a problem, and the out-of-roundness is caused by residual stress from the tooth machining. If not, it means that the out-of-roundness of circular contour one is caused by machining. At this time, collect the diameter of circular contour one and the distance of circular contour one from the root of the external gear ring from multiple points. By comparing the difference between the diameter of circular contour one and the standard diameter one, and the difference between the distance of circular contour one from the root of the external gear ring and the corresponding standard distance, analyze the problems existing in the machining equipment or operation method.