Valve lash pad matching apparatus
Patent Information
- Application Number
- CN202522050018.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-09-23
AI Technical Summary
[0003]在对发动机垫片进行维护的过程中，对于损坏的垫片需要进行更换且垫片更换后气门间隙也必须满足标准要求；目前传统的手工测量已经无法满足对于气门间隙精度的要求，且近年来虽应用激光测距、电感测微等新技术进行测量气门间隙，但成本高昂，且只能应用在高端生产线，并不适配售后维修的场景
1.支架放置在校准工位上，通过距离传感器测量气门间隙的标准值，再将支架放置到发的机上，通过距离传感器测量气门间隙的实际值，随后通过计算公式计算得出适配的垫片尺寸，选配装置选择弹出对应尺寸的垫片，工作人员将新的垫片安装在发动机上，完成对垫片的更换，通过距离传感器与机械支架的组合方式，无复杂精密部件，相较于激光测距、电感测微等高价技术，成本低且使用场景灵活，降低人为操作误差；同时能够根据传感器测量出的标准值与实际值通过公式计算出所需更换的垫片尺寸，通过选配装置弹出适配尺寸的垫片进行安装，实现售后维修的功能；
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Figure CN224744236U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of engines, and in particular to a valve clearance shim fitting device. Background Technology
[0002] When an engine is running, the valves expand due to increased temperature. If there is no clearance or the clearance is too small between the valves and their transmission components when cold, the thermal expansion of the valves and their transmission components when hot will inevitably cause the valves to not close tightly, resulting in air leakage during the compression and power strokes, thus reducing power and, in severe cases, making it difficult to start. To eliminate this phenomenon, a certain clearance is usually left in the valves and their transmission mechanism when the engine is cold-assembled to compensate for the expansion of the valves after heating. This clearance is called valve clearance; the valve clearance value needs to be controlled within the range of 0.10-0.35mm. With the implementation of the China VI emission regulations, the valve clearance tolerance requirement has been increased to ±0.02mm. Currently, most mainstream engines use a mechanical tappet + shim clearance adjustment method.
[0003] During engine gasket maintenance, damaged gaskets need to be replaced, and the valve clearance must meet the standard requirements after the gasket is replaced. Currently, traditional manual measurement can no longer meet the accuracy requirements for valve clearance. Although new technologies such as laser ranging and inductive microscopy have been used to measure valve clearance in recent years, they are expensive and can only be used on high-end production lines, which are not suitable for after-sales maintenance scenarios. Utility Model Content
[0004] To reduce the cost of measuring valve clearance and make it applicable to after-sales maintenance scenarios, this application proposes a valve clearance shim selection device.
[0005] This application provides a valve clearance shim selection device, which adopts the following technical solution: A valve clearance shim fitting device includes a worktable, a testing device for detecting valve clearance, and a fitting device for storing and providing shims of different sizes. Both the testing device and the fitting device are mounted on the worktable. The worktable has a testing platform for placing an engine. The testing device includes a calibration station for setting a standard valve clearance value, a bracket, and a distance sensor. The calibration station is mounted on the worktable, the bracket is placed on the calibration station, and the distance sensor is mounted on the bracket and measures the standard valve clearance value. The bracket is placed on the engine on the testing platform, and the distance sensor measures the actual valve clearance value. The fitting device dispenses a shim of the appropriate size based on the standard and actual values.
[0006] By adopting the above technical solution, the bracket is placed on the calibration station, and the standard value of the valve clearance is measured by the distance sensor. Then, the bracket is placed on the engine, and the actual value of the valve clearance is measured by the distance sensor. Subsequently, the appropriate shim size is calculated by the calculation formula. The matching device selects and pops out the shim of the corresponding size. The staff installs the new shim on the engine to complete the replacement of the shim.
[0007] In summary, by combining a distance sensor with a mechanical support, there are no complex and precision components. Compared with expensive technologies such as laser ranging and inductive microscopy, it is low in cost and flexible in application scenarios, reducing human error. At the same time, it can calculate the required shim size based on the standard value and actual value measured by the sensor using a formula, and install the appropriate shim by popping out the appropriate size through the optional device, realizing the function of after-sales maintenance.
[0008] Preferably, the optional device includes a mounting frame, several storage tubes for storing gaskets of different sizes and specifications, a movable seat for placing the gaskets, and a movable component for moving the gaskets from the storage tubes to the movable seat. The mounting frame is fixed on the worktable, and the several storage tubes are evenly spaced along the length of the mounting frame. The movable seat is mounted on the mounting frame and slides along the length of the mounting frame. The movable seat has a storage slot, and the movable component slides on the worktable to pop the gaskets stored in the storage tubes into the storage slot.
[0009] By adopting the above technical solution, after the distance sensor has tested the standard value and the actual value, the required shim size is calculated by formula. The moving seat slides to the storage tube position where the corresponding shim is stored. The moving part moves the shim at the storage tube position to the storage slot. The staff takes out the shim from the storage slot and replaces the corresponding shim on the engine on the test bench, thereby realizing the selection and matching of shims.
[0010] Preferably, four distance sensors are provided; four storage slots are provided, and the four storage slots are arranged along the moving trajectory of the movable seat.
[0011] By adopting the above technical solution, since engines typically have multiple valves (e.g., a 4-cylinder engine has 8 valves) and the wear value of the gaskets on each valve is different, the actual values measured for each valve are also different, and the size of the gaskets that need to be replaced is also different. By using four distance sensors to measure the actual values of the four valves at the same time, and then calculating the gaskets that are compatible with the four valves, the four gaskets are then pushed into four storage slots by moving parts. The staff can then take out the four gaskets one by one and replace the gaskets in the corresponding positions, which improves the efficiency of detection and replacement.
[0012] Preferably, the mounting bracket is equipped with an infrared sensor for detecting the position of the engine gasket on the test bench. The infrared sensor is slidably mounted on the mounting bracket and is located above the test bench. The movable base is equipped with four indicator lights corresponding to the four storage slots.
[0013] By adopting the above technical solution, the infrared sensor detects the position of the shim that the operator is replacing. At this time, one of the four indicator lights will light up, prompting the operator to take the shim from the storage slot corresponding to the indicator light position. The size of the shim in the storage slot is adapted to the position detected by the infrared detector. This prompt makes it convenient for the operator to replace the shim and prevents the wrong shim from being taken. In addition, the infrared sensor can also detect whether a shim is installed on the engine, preventing the operator from forgetting to replace the shim after removing it.
[0014] Preferably, the mounting frame has several placement slots, which are located below several storage tubes. The moving component is a cylinder, and the output shaft of the moving component extends and retracts to push the pad in the placement slot to the storage slot of the moving seat.
[0015] By adopting the above technical solutions, the design of the placement slot provides guidance and space for the falling of the pad and the movement of the moving part, ensuring that the pad can be pushed stably and accurately into the storage slot of the moving seat; the storage tube is set perpendicular to the worktable, so that the pad in the storage tube will automatically fall into the storage slot under its own gravity; using a cylinder as the moving part is a mature, low-cost, simple to maintain and powerful choice, ensuring that the pushing action is fast, powerful and accurate.
[0016] Preferably, a detection head for positioning is provided on the side of the bracket away from the distance sensor; four detection heads are provided corresponding to the four sensors.
[0017] By adopting the above technical solution, when the bracket is placed on the engine on the testing platform, the four testing heads abut against the mechanical tappets on the engine to ensure that the distance sensor can accurately measure the actual value and reduce the measurement error of the actual value.
[0018] Preferably, the support is equipped with a handle that makes it easy for workers to pick up the support.
[0019] By adopting the above technical solution, the handle provides a stable grip point, making it easy for staff to grasp the moving support, and also making it easy for staff to adjust the position of the support and align it with the measurement position, reducing operational errors.
[0020] Preferably, it also includes a control panel, which is mounted on the workbench and electrically connected to the distance sensor.
[0021] By adopting the above technical solution, standard values can be preset through the control panel, and the control panel can display the standard and actual values measured by the distance sensor in real time. The staff does not need to master the complex measurement principles, but only need to read the data and confirm the size of the pad through the panel. No professional training is required, which lowers the threshold for using the equipment.
[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The bracket is placed on the calibration station, and the standard value of the valve clearance is measured by a distance sensor. Then, the bracket is placed on the engine, and the actual value of the valve clearance is measured by the distance sensor. Subsequently, the appropriate shim size is calculated using a formula. The matching device selects and ejects the corresponding shim size. The operator installs the new shim on the engine, completing the shim replacement. Through the combination of distance sensor and mechanical bracket, there are no complex precision parts. Compared with expensive technologies such as laser ranging and inductive microscopy, it is low-cost and flexible in application scenarios, reducing human operation errors. At the same time, it can calculate the required shim size based on the standard value and actual value measured by the sensor, and install the appropriate shim by ejecting the matching shim size through the matching device, realizing the function of after-sales maintenance. 2. Engines typically have multiple valves, such as a 4-cylinder engine with 8 valves. The wear value of the gasket on each valve is different, so the actual value measured for each valve is also different, and the size of the gasket to be replaced is also different. By using four distance sensors to measure the actual value of four valves at the same time, and then calculating the gasket that matches the four valves, the four gaskets are then pushed into four storage slots by moving parts. The staff can then take out the four gaskets one by one and replace the gasket in the corresponding position, which improves the efficiency of inspection and replacement. 3. The infrared sensor detects the location of the shim that the worker is replacing. At this time, one of the four indicator lights will light up, prompting the worker to take the shim from the storage slot corresponding to the indicator light. The size of the shim in the storage slot is adapted to the detection position of the infrared detector. This prompt makes it convenient for the worker to replace the shim and prevents the wrong shim from being taken. In addition, the infrared sensor can also detect whether a shim is installed on the engine, preventing the worker from forgetting to replace the shim after removing it. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 Enlarged view of region A in the middle; Figure 3 This is a schematic diagram of the optional device in the embodiments of this application; Figure 4 yes Figure 3A magnified view of region B in the middle.
[0024] Reference numerals: 1. Workbench; 2. Testing table; 3. Testing device; 31. Calibration station; 32. Support; 33. Distance sensor; 34. Testing head; 4. Optional device; 41. Mounting bracket; 42. Storage tube; 43. Moving base; 44. Moving part; 5. Control panel; 6. Handle; 7. Storage slot; 8. Placement slot; 9. Indicator light; 10. Infrared sensor; 11. Engine. Detailed Implementation
[0025] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be described in further detail.
[0026] This application discloses a valve clearance shim selection device.
[0027] refer to Figure 1 A valve clearance shim fitting device includes a workbench 1, a testing platform 2 for placing an engine 11, a testing device 3 for testing valve clearance, a fitting device 4 for storing and providing shims of different sizes, and a control panel 5. The testing platform 2, testing device 3, fitting device 4, and control panel 5 are all installed on the testing platform 2, which is a rectangular plate. The engine 11 is placed on the testing platform 2 for quick positioning. The testing device 3 measures the standard value and the actual value of the valve clearance. The control panel 5 displays the measured standard value and the actual value and calculates the appropriate shim size. The fitting device 4 pops out a shim of the appropriate size. The operator uses the new shim popped out by the fitting device 4 to replace the old shim on the engine 11.
[0028] refer to Figure 1 and Figure 2 The testing device 3 includes a calibration station 31 for setting the standard value of valve clearance, a bracket 32, a distance sensor 33, and a testing head 34. The calibration station 31 is bolted to the workbench 1. The two ends of the bracket 32 are respectively placed on the calibration station 31. A handle 6 for easy gripping and picking up by the operator is bolted to the bracket 32. The distance sensor 33 is bolted to the side of the bracket 32 away from the calibration station 31. The control panel 5 is electrically connected to the distance sensor 33 to receive the measurement signal from the distance sensor 33. The testing head 34 is installed on the side of the bracket 32 close to the calibration station 31. In this embodiment, four distance sensors 33 and four testing heads 34 are provided, and the positions of the testing heads 34 correspond to the positions of the distance sensors 33.
[0029] Taking a four-cylinder engine 11 as an example, it has a total of 8 valves. When the bracket 32 is placed on the calibration station 31, the distance sensor 33 measures the standard value of the valve clearance. When the bracket 32 is placed on the engine 11 on the test bench 2, the four test heads 34 respectively abut against the mechanical tappets on the engine 11 to ensure that the distance sensor 33 can accurately measure the actual value and reduce the measurement error of the actual value.
[0030] refer to Figure 1 and Figure 3 The optional device 4 includes a mounting frame 41, several storage tubes 42 for storing gaskets of different sizes and specifications, a movable seat 43 for placing the gaskets, and a movable component 44 for moving the gaskets in the storage tubes 42 to the movable seat 43. The mounting frame 41 is bolted to the workbench 1. The several storage tubes 42 are evenly spaced along the length of the mounting frame 41. The movable seat 43 is slidably mounted on the mounting frame 41 via an electric slide table and slides along the length of the mounting frame 41. The movable component 44 is slidably mounted on the workbench 1 via an electric slide table and also slides along the length of the mounting frame 41.
[0031] refer to Figure 3 and Figure 4 The movable base 43 has storage slots 7, and there are four storage slots 7. The four storage slots 7 are arranged along the moving trajectory of the movable base 43. The four sensors simultaneously measure four actual values. The four storage slots 7 can store four shims at a time, and four shims can be replaced at the same time in one measurement, which improves the measurement and replacement efficiency. The mounting bracket 41 has several placement slots 8 along its own length direction. Several storage tubes 42 are all arranged perpendicular to the moving trajectory of the movable base 43. Several placement slots 8 are located below several storage tubes 42, and the storage slots 7 and placement slots 8 are at the same height. In this embodiment, the moving part 44 is a cylinder, and the cylinder output shaft is also at the same height as the placement slots 8.
[0032] After the distance sensor 33 has tested the standard and actual values, the required shim size is calculated using a formula. The moving seat 43 slides so that the position of the storage slot 7 corresponds to the position of the placement slot 8 below the storage tube 42 that stores the corresponding shim. The moving part 44 also slides to the position of the placement slot 8 below the storage tube 42 that stores the corresponding shim. The cylinder output shaft extends and retracts to push the shim in the placement slot 8 onto the storage slot 7. Then, the staff takes out the shim from the storage slot 7 and replaces the shim corresponding to the engine 11 on the test bench 2, thereby achieving the selection and matching of shims.
[0033] refer to Figure 1An infrared sensor 10 is slidably mounted on the mounting bracket 41 via an electric slide table, and the infrared sensor 10 is located above the detection table 2. Four indicator lights 9 are set on the movable base 43 corresponding to the four storage slots 7. The infrared sensor 10 detects the position of the shim being replaced by the operator, at which point one of the four indicator lights 9 illuminates, prompting the operator to retrieve the shim from the storage slot 7 corresponding to the indicator light 9. The size of the shim in the storage slot 7 is adapted to the detection position of the infrared detector. This prompt facilitates the operator in replacing the shim and prevents the mistake of taking the wrong shim. Furthermore, the infrared sensor 10 can also detect whether a shim is installed on the engine 11, preventing the operator from forgetting to replace the shim after removing it.
[0034] The implementation principle of this application embodiment is as follows: Taking a four-cylinder engine 11 as an example, the operator first presets the standard value on the operation panel. Then, when the bracket 32 is placed on the calibration station 31, the distance sensor 33 measures the standard value of the valve clearance. After that, when the bracket 32 is placed on the engine 11 on the test bench 2, the four test heads 34 respectively abut against the mechanical tappets on the engine 11 to ensure that the distance sensor 33 can accurately measure the actual value and reduce the measurement error of the actual value. After the distance sensor 33 has tested the standard value and the actual value, the four required shim sizes are calculated by formula, and the moving seat 43 is controlled to slide so that the position of the storage slot 7 corresponds to the position of the placement slot 8 below the storage tube 42 that stores the corresponding shim. The moving part 44 also slides to the position of the placement slot 8 below the storage tube 42 of the corresponding shim, and the cylinder output shaft extends and retracts to push the shim in the placement slot 8 onto the storage slot 7. Then, the operator takes out the shim from the storage slot 7 and replaces the corresponding shim of the engine 11 on the test bench 2, thereby realizing the selection and matching of shims.
[0035] In summary, by combining the distance sensor 33 with the mechanical bracket 32, there are no complex and precision parts. Compared with expensive technologies such as laser ranging and inductive microscopy, the cost is low and the application scenarios are flexible, reducing human operation errors. At the same time, the required shim size can be calculated by formula based on the standard value and actual value measured by the sensor. The appropriate shim size can be popped out by the optional device 4 for installation, realizing the function of after-sales maintenance.
[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A valve lash gap shim selection apparatus, comprising: The device includes a workbench (1), a testing device (3) for detecting valve clearance, and an optional device (4) for storing and providing shims of different sizes. Both the testing device (3) and the optional device (4) are installed on the workbench (1). The workbench (1) is provided with a testing platform (2) for placing the engine (11). The testing device (3) includes a calibration station (31) for setting the standard value of valve clearance, a bracket (32), and a distance sensor (33). The calibration station (31) is installed on the workbench (1), the bracket (32) is placed on the calibration station (31), and the distance sensor (33) is installed on the bracket (32) and measures the standard value of valve clearance. The bracket (32) is placed on the engine (11) on the testing platform (2) and measures the actual value of valve clearance through the distance sensor (33). The optional device (4) pops out a shim of the appropriate size according to the standard value and the actual value.
2. A valve lash gap shim selection apparatus as described in claim 1, wherein, The optional device (4) includes a mounting frame (41), several storage tubes (42) for storing gaskets of different sizes and specifications, a movable seat (43) for placing gaskets, and a movable component (44) for moving the gaskets in the storage tubes (42) to the movable seat (43). The mounting frame (41) is fixed on the workbench (1), and the several storage tubes (42) are evenly spaced along the length of the mounting frame (41). The movable seat (43) is mounted on the mounting frame (41) and slides along the length of the mounting frame (41). The movable seat (43) has a storage slot (7) on it, and the movable component (44) slides on the workbench (1) to pop the gaskets stored in the storage tubes (42) into the storage slot (7).
3. A valve lash gap shim selection apparatus as described in claim 2, wherein, Four distance sensors (33) are provided; four storage slots (7) are provided, and the four storage slots (7) are arranged along the moving trajectory of the moving seat (43).
4. A valve lash gap shim selection apparatus as described in claim 3, wherein, The mounting bracket (41) is equipped with an infrared sensor (10) for detecting the position of the engine (11) gasket on the test bench (2). The infrared sensor (10) is slidably mounted on the mounting bracket (41) and is located above the test bench (2). The movable seat (43) is equipped with four indicator lights (9) corresponding to the four storage slots (7).
5. A valve lash cap gasket selection apparatus as described in claim 2, wherein, The mounting bracket (41) has several placement slots (8), and several storage tubes (42) are arranged perpendicular to the movement trajectory of the moving seat (43). The several placement slots (8) are respectively located below the several storage tubes (42). The moving part (44) is a cylinder. The output shaft of the moving part (44) extends and retracts to push the pad in the placement slot (8) to the storage slot (7) of the moving seat (43).
6. The valve clearance adjusting shim selection device according to claim 1, characterized in that, The bracket (32) is provided with a detection head (34) for positioning on the side away from the distance sensor (33); the detection head (34) is provided with four corresponding to the four sensors.
7. A valve lash cap gasket selection apparatus as described in claim 1, wherein, The bracket (32) is equipped with a handle (6) to facilitate the worker to pick up the bracket (32).
8. A valve lash cap gasket selection apparatus as described in claim 1, wherein, It also includes a control panel (5) which is mounted on the workbench (1) and is electrically connected to the distance sensor (33).