Regarding the outboard engine valve tapping and airtightness testing device

Abstract

This utility model discloses a device for outboard engine valve tapping and airtightness testing, belonging to the field of airtightness testing technology. It includes a workbench, with an operation panel supported and connected to the right end surface of the workbench via an auxiliary rod. A third deep groove ball bearing is connected to the right end surface of a rotating bracket, and a third encoder is installed at the other end of the third deep groove ball bearing. A rotating base plate is provided between a third diaphragm coupling and the third deep groove ball bearing. A connecting frame is provided above the rotating base plate, and a valve tapping mechanism is installed inside the connecting frame. A tray assembly is installed on the upper surface of the rotating base plate. This utility model, through a series of structural features, achieves stable grinding, improved precision, and reduced costs. Simultaneously, the adoption of a three-axis linkage architecture ensures equipment stability and reliability, improves the quality of tapping and grinding, and integrates tapping and grinding with airtightness testing functions, making operation more convenient and simple.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, specifically to a device for testing the flapping of outboard engine valves and airtightness. Background Technology

[0002] In the field of marine engineering, with the continuous development of the shipbuilding industry, outboard engines, as important power equipment for ships, directly affect the navigation safety and efficiency of the vessels due to their performance. The cylinder head, as a key component of the outboard engine, plays a decisive role in the engine's power output, fuel economy, and emissions performance through its assembly quality and airtightness. Traditional valve grinding and airtightness testing mainly rely on manual operation, which is not only inefficient but also makes it difficult to guarantee the accuracy of airtightness, thus affecting engine performance. Therefore, developing a highly efficient and accurate outboard engine cylinder head valve tapping and airtightness testing device is particularly important. The research and application of this outboard engine valve tapping and airtightness testing device aims to meet the needs of valve assembly quality, production efficiency, and information management in the outboard engine production process, and has significant practical significance and market value.

[0003] With the continuous development of the shipbuilding industry, the market demand for outboard engines is increasing, and the requirements for their performance and quality are also becoming more stringent. Different types and specifications of outboard engines are constantly emerging, requiring valve assembly and testing equipment to adapt to the diverse needs of different engine models. Traditional engine cylinder head valve grinding and airtightness testing methods can no longer meet the needs of modern outboard engine manufacturing plants. At the same time, in order to improve production efficiency and reduce production costs, shipbuilding companies are placing higher demands on the automation level of outboard engine production. Traditional valve grinding and airtightness testing methods can no longer meet the needs of large-scale, high-efficiency, and high-quality production, urgently requiring an advanced automated device to perform valve grinding and airtightness testing. Therefore, this paper proposes a device for outboard engine valve grinding and airtightness testing. Utility Model Content

[0004] The purpose of this invention is to provide a device for outboard engine valve tapping and airtightness testing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for outboard engine valve tapping and airtightness testing, comprising a workbench, an operation panel supported and connected to the right end surface of the workbench by an auxiliary rod, an airtightness tester mounted on the upper surface of the operation panel, a power distribution cabinet connected to the rear end surface of the workbench, a servo lifting mechanism connected to the rear end of the upper surface of the workbench, a rotating bracket connected to the upper surface of the workbench, a third diaphragm coupling connected to the left end surface of the rotating bracket, a third angle reducer connected to the end of the third diaphragm coupling away from the rotating bracket, and a third servo motor connected to the other end surface of the third angle reducer, a third deep groove ball bearing connected to the right end surface of the rotating bracket, and a third encoder provided at the other end of the third deep groove ball bearing, a rotating base plate provided between the third diaphragm coupling and the third deep groove ball bearing, a connecting frame provided above the rotating base plate, a valve tapping mechanism installed inside the connecting frame, and a tray assembly 39 mounted on the upper surface of the rotating base plate.

[0006] Preferably, the servo lifting mechanism includes a lifting bracket, a buffer, a first guide rail, a first servo motor, a first rotary reducer, a first diaphragm coupling, a first cylinder, a first ball screw, a first deep groove ball bearing, and a first encoder. The lifting bracket is connected to the upper surface of the worktable. Two buffers are symmetrically installed on the bottom of the front surface of the lifting bracket. A first guide rail is provided above each of the two buffers. A first servo motor is provided at the top of the lifting bracket. The output end of the first servo motor is connected to the first rotary reducer. The other end of the first rotary reducer is connected to the first diaphragm coupling. A first cylinder is provided on one side of the first diaphragm coupling. A first ball screw is connected to the bottom of the first diaphragm coupling. A first deep groove ball bearing is provided at the bottom of the first ball screw. A first encoder is provided below the first deep groove ball bearing.

[0007] Preferably, the valve tapping mechanism includes a support plate, a support frame, a camshaft, and a telescopic shaft fixture. The support plate is located inside the connecting frame. The support frame is installed on the upper surface of the support plate. A rotating shaft is provided inside the support frame, and multiple camshafts are connected at equal intervals on the outer surface of the rotating shaft. A telescopic shaft fixture is provided below the camshaft, and the telescopic shaft fixture is bolted to the upper surface of the support plate.

[0008] Preferably, a second guide rail is connected to the bottom of the pallet, a second rotary reducer is installed at the right end of the pallet, a second diaphragm coupling is connected to the rear end of the second rotary reducer, a second ball screw is connected to the rear end of the second diaphragm coupling, a third guide rail is connected to the outer surface of the second ball screw, a second deep groove ball bearing is connected to the rear end of the second ball screw, and a second encoder is installed at the rear end of the second deep groove ball bearing.

[0009] Preferably, a second cylinder is installed at the left end of the pallet, the output end of the second cylinder is connected to a fourth guide rail, and a second servo motor is provided on the rear side of the third guide rail.

[0010] Preferably, a tapping motor is installed on the upper surface of the support frame, and the output end of the tapping motor is connected to a synchronous belt through a turntable. The other end of the synchronous belt is connected to the internal rotating shaft of the support frame through the turntable.

[0011] Preferably, the pallet assembly includes a pallet base plate, a bushing, and a locating pin. The pallet base plate is located on the upper surface of the rotating base plate, and the upper surface of the pallet base plate is provided with a bushing. The outer side of the bushing is provided with a locating pin that is also connected to the upper surface of the pallet base plate.

[0012] Preferably, a circular handle is connected to the right end of the pallet bottom plate, and two quick clamps are symmetrically connected to the left and right ends of the upper surface of the pallet bottom plate.

[0013] Preferably, a sealing ring is provided at the rear end of the upper surface of the pallet bottom plate, a quick connector is connected to the front end of the pallet bottom plate through a preset through hole, and an air inlet sealing block is provided at the front end of the upper surface of the pallet bottom plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This device for outboard engine valve tapping and airtightness testing integrates the valve tapping and airtightness testing functions into one unit, changing the traditional separate process of tapping and airtightness testing in valve production. The traditional method requires separate operation on different equipment, which not only increases the equipment footprint but also makes the transfer of valves between different processes time-consuming and labor-intensive. The integrated design of this device allows valve tapping adjustment and airtightness testing to be completed on a single machine, significantly improving production efficiency, reducing production space occupation, and lowering the probability of human error caused by process transitions.

[0016] 2. This device for testing the valve tapping and airtightness of outboard motors employs a mature PLC control system. Based on the debugging parameters, it performs tapping and grinding steps and sets the tapping and grinding time accordingly. It also uses optical sensors to control the angle and displacement, improving the adjustment accuracy. The PLC control system can coordinate the operation of the intake and exhaust valves, enabling personalized and precise tapping operations. This device is also linked to the factory's MES system for remote monitoring and querying of valve tapping data, collecting and storing valve tapping data, and allowing for traceability of tapping and grinding data, thus achieving intelligent operation.

[0017] 3. This outboard motor valve tapping and airtightness detection device employs advanced airtightness detection technology, equipped with high-precision pressure and flow sensors, enabling it to detect even minute gas leaks. The detection accuracy is significantly improved compared to traditional equipment. Simultaneously, the system features a multi-level early warning mechanism. When valve airtightness is detected as substandard, an alarm will be immediately issued, and tiered warnings will be provided based on the degree of leakage. For valves with minor leaks, the system will suggest secondary treatment; for valves with severe leaks, they will be directly marked as defective, facilitating timely action by operators and ensuring product quality stability.

[0018] 4. This device for testing the tapping and airtightness of outboard engine valves possesses comprehensive data recording and analysis capabilities. It can record key data such as tapping parameters and airtightness test results for each valve in real time. This data is stored in a database for easy retrieval and traceability. Analysis of large amounts of data can also reveal the patterns of quality fluctuations during valve production, providing a strong basis for optimizing production processes, improving overall production quality and efficiency, and achieving intelligent management of the production process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the servo lifting mechanism of this utility model;

[0021] Figure 3 This is a schematic diagram of the valve flapping mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the rotating bracket and rotating base plate structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the tray assembly structure of this utility model;

[0024] Figure 6 This is an exploded view of the tray assembly of this utility model.

[0025] In the diagram: 1. Workbench; 2. Control panel; 3. Air tightness tester; 4. Power distribution cabinet; 5. Lifting bracket; 6. Buffer; 7. First guide rail; 8. First servo motor; 9. First rotary reducer; 10. First diaphragm coupling; 11. First cylinder; 12. First ball screw; 13. First deep groove ball bearing; 14. First encoder; 15. Connecting frame; 16. Support plate; 17. Second guide rail; 18. Second cylinder; 19. Third guide rail; 20. Support frame; 21. Camshaft; 22. Second servo motor; 23. Second rotary reducer; 24. Second diaphragm coupling; 25. Second cylinder. 26. Ball screw; 27. Second deep groove ball bearing; 28. Second encoder; 29. ​​Fourth guide rail; 30. Synchronous belt; 31. Beating motor; 32. Telescopic shaft tooling; 33. Rotary bracket; 34. Third diaphragm coupling; 35. Third angle reducer; 36. Third servo motor; 37. Rotary base plate; 38. Third deep groove ball bearing; 39. Third encoder; 30. Pallet assembly; 3901. Pallet base plate; 3902. Bushing; 3903. Positioning pin; 3904. Circular handle; 3905. Quick clamp; 3906. Sealing ring; 3907. Quick connector; 3908. Inlet sealing block. Detailed Implementation

[0026] 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.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, 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 used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] like Figures 1 to 6As shown, this embodiment of the outboard engine valve tapping and airtightness testing device includes a workbench 1. An operation panel 2 is connected to the right end of the workbench 1 via an auxiliary rod. The workbench 1 serves as the basic framework of the entire device, connecting and supporting the tapping machine and other components of the airtightness testing device. It allows adjustment of the device's horizontal height, a start switch, and an emergency stop switch. The operation panel 2 provides users with an interface for switching engine models, automated operation, tapping rhythm, and quality monitoring. It can connect to the factory's MES system for remote monitoring and querying of valve tapping data, collecting and storing valve tapping data. An airtightness tester 3 is mounted on the upper surface of the operation panel 2, used to control and inspect the intake and exhaust valve tapping. The valve sealing is automated, and the airtightness tester 3 has high sensitivity. It can also be connected to the factory MES system to collect and store valve sealing data for later tracking. The rear surface of the workbench 1 is connected to the power distribution cabinet 4, which provides power to the valve tapping and airtightness testing devices, and provides power distribution and automated control for the equipment. The rear end of the upper surface of the workbench 1 is connected to the servo lifting mechanism, which provides displacement and support force for the valve tapping mechanism. The height displacement of the valve tapping mechanism is automatically adjusted by the PLC system of the operation panel 2 for different models. For the same model, the valve tapping mechanism and the workbench 1 are connected. The upper surface of the workbench 1 is connected to the rotating bracket 32. A third diaphragm coupling 33 is connected to the left end surface of the rotating bracket 32. A third angle reducer 34 is connected to the end of the third diaphragm coupling 33 furthest from the rotating bracket 32, and a third servo motor 35 is connected to the other end surface of the third angle reducer 34. A third deep groove ball bearing 37 is connected to the right end surface of the rotating bracket 32, and a third encoder 38 is installed at the other end of the third deep groove ball bearing 37. A rotating base plate 36 is provided between the third diaphragm coupling 33 and the third deep groove ball bearing 37. A connecting frame 15 is provided above the rotating base plate 36. These components, when combined, form a servo angle rotation mechanism. Using the rotating bracket 32 ​​and other components, the engine cylinder rotates... During the airtightness test, the cylinder head can be rotated at a certain angle to make the intake and exhaust valves of the cylinder head coaxial with the valve tapping telescopic shaft tool 31 of the valve tapping mechanism. The intake and exhaust valve tapping sequence can also be rotated according to the system specifications to provide support for the valve tapping mechanism. The valve tapping mechanism is installed inside the connecting frame 15. The valve tapping mechanism is the main working part of the cylinder head valve grinding. The valve and valve seat are rubbed against each other by the valve tapping telescopic shaft tool 31 to form a line contact and achieve a sealing effect. The upper surface of the rotating base plate 36 is equipped with a tray assembly 39, which provides support for the valve tapping mechanism. The test results are fed back to the airtightness tester 3.

[0029] Specifically, the servo lifting mechanism includes a lifting bracket 5, a buffer 6, a first guide rail 7, a first servo motor 8, a first rotary reducer 9, a first diaphragm coupling 10, a first cylinder 11, a first ball screw 12, a first deep groove ball bearing 13, and a first encoder 14. The lifting bracket 5 is connected to the upper surface of the worktable 1. Two buffers 6 are symmetrically installed on the bottom left and right sides of the front surface of the lifting bracket 5. A first guide rail 7 is provided above each of the two buffers 6. A first servo motor 8 is provided on the top of the lifting bracket 5. The output end of the first servo motor 8 is connected to the first rotary reducer 9. The other end of 9 is connected to a first diaphragm coupling 10. A first cylinder 11 is provided on one side of the first diaphragm coupling 10. A first ball screw 12 is connected to the bottom of the first diaphragm coupling 10. A first deep groove ball bearing 13 is provided at the bottom of the first ball screw 12. A first encoder 14 is provided below the first deep groove ball bearing 13. The first servo motor 8 drives the first ball screw 12 and transmits power through the first diaphragm coupling 10, causing the lifting bracket 5 to move along the first guide rail 7. The buffer 6 plays a stabilizing and protective role. The first encoder 14 provides real-time feedback of the rotation angle to ensure the accuracy of height adjustment.

[0030] Furthermore, the valve tapping mechanism includes a support plate 16, a support frame 20, a camshaft 21, and a telescopic shaft fixture 31. The support plate 16 is located inside the connecting frame 15. The support frame 20 is mounted on the upper surface of the support plate 16. A rotating shaft is provided inside the support frame 20, and multiple camshafts 21 are connected at equal intervals on the outer surface of the rotating shaft. The telescopic shaft fixture 31 is provided below the camshaft 21, and the telescopic shaft fixture 31 is bolted to the upper surface of the support plate 16.

[0031] Furthermore, a second guide rail 17 is connected to the bottom of the pallet 16, a second rotary reducer 23 is installed at the right end of the pallet 16, a second diaphragm coupling 24 is connected to the rear end of the second rotary reducer 23, a second ball screw 25 is connected to the rear end of the second diaphragm coupling 24, a fourth guide rail 28 is connected to the outer surface of the second ball screw 25, a second deep groove ball bearing 26 is connected to the rear end of the second ball screw 25, and a second encoder 27 is installed at the rear end of the second deep groove ball bearing 26.

[0032] Furthermore, a second cylinder 18 is installed on the left end of the pallet 16, and the output end of the second cylinder 18 is connected to a third guide rail 19. A second servo motor 22 is provided on the rear side of the third guide rail 19.

[0033] Furthermore, a tapping motor 30 is installed on the upper surface of the support frame 20. The output end of the tapping motor 30 is connected to a synchronous belt 29 through a turntable. The other end of the synchronous belt 29 is connected to the internal rotating shaft of the support frame 20 through the turntable. During the valve tapping and grinding stage, the tapping motor 30 is started, driving the camshaft 21 to rotate. The camshaft 21 drives the telescopic shaft tool 31, causing the valve and valve seat to rub against each other. Through continuous tapping, they form line contact, thereby achieving a sealing effect.

[0034] Furthermore, the pallet assembly 39 includes a pallet base plate 3901, a bushing 3902, and a positioning pin 3903. The pallet base plate 3901 is located on the upper surface of the rotating base plate 36. The bushing 3902 is provided on the upper surface of the pallet base plate 3901. The positioning pin 3903, which is also connected to the upper surface of the pallet base plate 3901, is provided on the outer side of the bushing 3902. The positioning pin 3903 is used to position and connect the engine cylinder to the pallet base plate 3901.

[0035] Furthermore, a circular handle 3904 is connected to the right end of the pallet base plate 3901, and two quick clamps 3905 are symmetrically connected to the left and right ends of the upper surface of the pallet base plate 3901. The engine cylinder can be quickly clamped by the quick clamps 3905.

[0036] Furthermore, a sealing ring 3906 is provided at the rear end of the upper surface of the tray base plate 3901, and a quick connector 3907 is connected to the front end of the tray base plate 3901 through a pre-set through hole. An air intake sealing block 3908 is provided at the front end of the upper surface of the tray base plate 3901. The sealing ring 3906 and the air intake sealing block 3908 ensure the sealing effect.

[0037] The usage method of this embodiment is as follows: Turn on the switches of the power distribution cabinet 4, operation panel 2, and airtightness tester 3; adjust the operation panel 2 and airtightness tester 3 to correspond to the model to be tested; install the valve tapping shaft fixture corresponding to the model onto the valve tapping mechanism; simultaneously replace the corresponding model's tray base plate 3901 onto the rotating bracket 32; install the cylinder head to be tapped, ground, and tested for airtightness on the tray base plate 3901, and install the airtightness testing fixture on the cylinder head. The servo lifting mechanism operates according to the instructions of the PLC system on the operation panel 2; the system automatically adjusts the height displacement of the valve tapping mechanism corresponding to the model. Among its components, the first servo motor 8 drives the first ball screw 12, transmitting power through the first diaphragm coupling 10, causing the lifting bracket 5 to move along the first guide rail 7; the buffer 6 provides stability and protection; and the first encoder 14 provides real-time feedback of the rotation angle to ensure the accuracy of height adjustment. The rotating bracket 32 ​​rotates the intake and exhaust valves of the cylinder head to a suitable angle, preparing for the valve tapping operation. The third servo motor 35 controls the rotation of the rotating bracket 32, providing accurate angular displacement for the valve tapping mechanism. During the valve tapping and grinding stage, the tapping motor 30 starts, driving the camshaft 21 to rotate. The camshaft 21 drives the telescopic shaft fixture 31, causing the valve and valve seat to rub against each other. Through continuous tapping, they form line contact, thereby achieving a sealing effect. According to the program on the operation panel 2, the cylinder head intake and exhaust valves will be tapped and ground. The tapping sequence will be transmitted, and the cylinder head tray and tapping sequence will be rotated according to the instructions. The operation panel 2 has the tapping fixture time and sequence pre-programmed in the system. At the same time, the operation panel 2 will monitor the tapping cycle and quality. During the valve tightness testing phase, after the tapping and grinding are completed, the tightness tester 3 will automatically start working. Air is supplied to the cylinder head via quick connector 3907 to test the valve's seal after tapping. This tester is highly sensitive, can operate automatically, and can accurately detect whether there is a leak in the valve. The test results are fed back to the tightness tester 3 and connected to the factory's MES system to collect and store valve sealing data for later tracking. After completing the valve tapping and tightness testing, the equipment stops operating, and the operator removes the cylinder head that has undergone valve tapping and replaces it with a new cylinder head for valve tapping, grinding, and tightness testing.

[0038] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for detecting valve slap and air tightness in relation to an outboard engine, comprising a workbench (1), characterised in that: An operation panel (2) is connected to the right end surface of the workbench (1) via an auxiliary rod. An airtightness tester (3) is installed on the upper surface of the operation panel (2). A power distribution cabinet (4) is connected to the rear end surface of the workbench (1). A servo lifting mechanism is connected to the rear end of the upper surface of the workbench (1). A rotating bracket (32) is connected to the upper surface of the workbench (1). A third diaphragm coupling (33) is connected to the left end surface of the rotating bracket (32). A third angle reducer (34) is connected to the end of the third diaphragm coupling (33) away from the rotating bracket (32). The other end of the three-angle reducer (34) is connected to a third servo motor (35). The right end of the rotating bracket (32) is connected to a third deep groove ball bearing (37), and the other end of the third deep groove ball bearing (37) is provided with a third encoder (38). A rotating base plate (36) is provided between the third diaphragm coupling (33) and the third deep groove ball bearing (37). A connecting frame (15) is provided above the rotating base plate (36). A valve tapping mechanism is installed inside the connecting frame (15). A tray assembly (39) is installed on the upper surface of the rotating base plate (36).

2. The outboard engine valve slap and air tightness detection device according to claim 1, characterized by: The servo lifting mechanism includes a lifting bracket (5), a buffer (6), a first guide rail (7), a first servo motor (8), a first rotary reducer (9), a first diaphragm coupling (10), a first cylinder (11), a first ball screw (12), a first deep groove ball bearing (13), and a first encoder (14). The lifting bracket (5) is connected to the upper surface of the worktable (1). Two buffers (6) are symmetrically installed on the bottom of the front end surface of the lifting bracket (5). A first guide rail (7) is provided above each of the two buffers (6). 5) is provided with a first servo motor (8) at the top, the output end of the first servo motor (8) is connected to a first rotary reducer (9), the other end of the first rotary reducer (9) is connected to a first diaphragm coupling (10), a first cylinder (11) is provided on one side of the first diaphragm coupling (10), a first ball screw (12) is connected to the bottom of the first diaphragm coupling (10), a first deep groove ball bearing (13) is provided at the bottom of the first ball screw (12), and a first encoder (14) is provided below the first deep groove ball bearing (13).

3. The outboard engine valve slap and air tightness detection device according to claim 1, characterized by: The valve tapping mechanism includes a support plate (16), a support frame (20), a camshaft (21), and a telescopic shaft fixture (31). The support plate (16) is located inside the connecting frame (15). The support frame (20) is installed on the upper surface of the support plate (16). A rotating shaft is provided inside the support frame (20), and multiple camshafts (21) are connected at equal intervals on the outer surface of the rotating shaft. A telescopic shaft fixture (31) is provided below the camshaft (21), and the telescopic shaft fixture (31) is bolted to the upper surface of the support plate (16).

4. The outboard engine valve slap and air tightness detection device according to claim 3, characterized by: The bottom of the pallet (16) is connected to a second guide rail (17). A second rotary reducer (23) is installed at the right end of the pallet (16). A second diaphragm coupling (24) is connected to the rear end of the second rotary reducer (23). A second ball screw (25) is connected to the rear end of the second diaphragm coupling (24). A fourth guide rail (28) is connected to the outer surface of the second ball screw (25). A second deep groove ball bearing (26) is connected to the rear end of the second ball screw (25). A second encoder (27) is installed at the rear end of the second deep groove ball bearing (26).

5. The outboard engine valve slap and air tightness detection device according to claim 3, characterized by: A second cylinder (18) is installed on the left end of the pallet (16), and the output end of the second cylinder (18) is connected to a third guide rail (19). A second servo motor (22) is provided on the rear side of the third guide rail (19).

6. The outboard engine valve slap and air tightness detection apparatus according to claim 3, characterized by: A tapping motor (30) is mounted on the upper surface of the support frame (20). The output end of the tapping motor (30) is connected to a synchronous belt (29) via a turntable. The other end of the synchronous belt (29) is connected to the internal rotating shaft of the support frame (20) via a turntable.

7. The outboard engine valve slap and air tightness detection apparatus according to claim 1, characterized by: The pallet assembly (39) includes a pallet base plate (3901), a bushing (3902), and a positioning pin (3903). The pallet base plate (3901) is located on the upper surface of the rotating base plate (36). The bushing (3902) is provided on the upper surface of the pallet base plate (3901), and the positioning pin (3903) is also connected to the upper surface of the pallet base plate (3901) on the outer side of the bushing (3902).

8. The outboard engine valve slap and air tightness detection device according to claim 7, characterized by: A circular handle (3904) is connected to the right end of the pallet bottom plate (3901), and two quick clips (3905) are symmetrically connected to the left and right ends of the upper surface of the pallet bottom plate (3901).

9. The outboard engine valve slap and air tightness detection apparatus according to claim 7, characterized by: A sealing ring (3906) is provided at the rear end of the upper surface of the tray bottom plate (3901), a quick connector (3907) is connected to the front end of the tray bottom plate (3901) through a preset through hole, and an air inlet sealing block (3908) is provided at the front end of the upper surface of the tray bottom plate (3901).

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