An airtightness testing device for engine cylinder blocks
By using a servo motor-driven sliding rod and dust hood design, the problems of observing the sealing of the contact area between the air nozzle and the cylinder and cleaning debris on the placement platform in the airtightness testing device are solved, achieving efficient airtightness testing and cleaning results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HARBIN DONGAN HUAFU MACHINERY MFG
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-30
AI Technical Summary
Existing airtightness testing devices are not very effective in observing and testing the sealing of the contact area between the air nozzle and the cylinder, and the surface of the test platform is not well cleaned of debris, which affects the accuracy of the test data.
An air tightness testing device was designed, comprising a servo motor, a swing arm, a sliding arm, a dust hood, and a test flag. The servo motor drives the swing arm to slide the sliding arm and the dust hood, enabling observation of the sealing of the contact area between the air nozzle and the cylinder and cleaning of debris on the placement platform. The test flag is used to determine the air leakage and drive the dust hood to clean up the debris.
It improves the accuracy and efficiency of airtightness testing, prevents debris from clogging the test results, and ensures data accuracy.
Smart Images
Figure CN224435671U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engine cylinder block processing technology, specifically to an airtightness testing device for engine cylinder blocks. Background Technology
[0002] The cylinder block is one of the core components of an engine. Based on the difference in its position relative to the oil pan mounting plane, it is divided into three types: general type, gantry type, and tunnel type. Its structure is mainly water-cooled and needs to be matched with the cylinder head gasket to ensure the sealing of the combustion chamber. When manufacturing and processing the generator cylinder block, it is necessary to test the generator cylinder block through an airtightness testing device.
[0003] However, while existing airtightness testing devices can perform airtightness testing on generator cylinders relatively well, the effect of simultaneously observing and testing the seal at the connection between the nozzle and the cylinder is not high when the nozzle contacts the cylinder. Furthermore, the effect of simultaneously cleaning debris from the cylinder placement platform after testing is not high, and external factors such as impurities can easily cause inaccurate airtightness test data from the nozzle.
[0004] Therefore, in view of this, we have studied and improved the existing structure to address its shortcomings, and proposed a gas tightness testing device for engine cylinder blocks. Utility Model Content
[0005] The purpose of this invention is to provide an airtightness testing device for engine cylinder blocks, in order to solve the problems mentioned in the background art, such as the low effect of simultaneous observation and testing of the sealing performance of the connection between the air nozzle and the cylinder block when the air nozzle on the device contacts the cylinder block, and the low effect of simultaneous dust collection and cleaning of debris on the surface of the cylinder block placement platform after testing the cylinder block.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for testing the air tightness of an engine cylinder block, comprising a device body, an air nozzle provided on the outer wall of the device body, an engine cylinder block placement platform slidably connected to the outer wall of the device body, a swing rod rotatably connected to the outer wall of the device body, a sliding rod slidably connected to the outer wall of the swing rod and slidably connected to the outer wall of the device body, a test flag detachably connected to the outer wall of the sliding rod, a dust collection hood fixedly connected to the outer wall of the sliding rod, a connecting pipe fixedly connected to the outer wall of the dust collection hood, and a collection box disposed on the outer wall of the device body fixedly connected to one end of the connecting pipe.
[0007] Furthermore, a servo motor is provided on the outer wall of the main body of the device, and the output end of the servo motor is fixedly connected to the rotation center of the swing arm.
[0008] Furthermore, a limiting groove is provided at the connection between the outer wall of the swing rod and the sliding rod, and a sliding groove is provided at the connection between the outer wall of the main body of the device and the sliding rod.
[0009] Furthermore, two sets of sliding rods and limiting grooves are provided, and the positions of the two sets of sliding rods and limiting grooves are equidistantly distributed about the rotation center of the swing rod.
[0010] Furthermore, the air nozzle is positioned on the extension and retraction trajectory of the detection flag.
[0011] Furthermore, the dust collection hood is provided in two sets, and the positions of the two sets of dust collection hoods are symmetrical about the central axis of the engine block mounting platform.
[0012] Furthermore, the dust hood is inclined toward the engine block mounting platform.
[0013] Furthermore, the connecting pipe is made of flexible tubing, and a protective plate located on one side of the air nozzle is rotatably connected to the outer wall of the main body of the device.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] In this invention, when performing airtightness testing on a generator cylinder using an airtightness testing device, to improve the switching effect of observing the air density at the contact point between the nozzle and the cylinder and debris on the placement platform, when the generator cylinder is placed on the placement platform for testing, the servo motor is activated. The rotation of the swing arm drives the sliding rod to slide synchronously along the inner wall of the limiting groove and the sliding channel, causing the dust collection hood and the testing flag to slide relative to each other. This allows the testing flag to move to the contact point between the nozzle and the cylinder. By observing whether the testing flag moves, it is determined whether there is an air leak at the contact point between the nozzle and the cylinder. Simultaneously, after testing the cylinder, the servo motor is driven to move in the opposite direction, causing the dust collection hood to move to one side of the placement platform to clean debris from the platform surface, preventing debris from clogging and affecting the accuracy of the airtightness test data. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the detection device of this utility model;
[0017] Figure 2 This is a three-dimensional structural diagram of the detection device of this utility model from another direction;
[0018] Figure 3 This is a schematic diagram of the sliding rod position distribution structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the groove position distribution structure of this utility model.
[0020] In the picture:
[0021] 1. Main body of the device; 2. Air nozzle; 3. Engine cylinder block mounting platform; 4. Servo motor; 5. Swing rod; 6. Sliding rod; 7. Limiting groove; 8. Slide groove; 9. Detection flag; 10. Dust hood; 11. Connecting pipe; 12. Collection box; 13. Protective plate. Detailed Implementation
[0022] 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. Example
[0023] like Figures 1-4 As shown, an airtightness testing device for an engine cylinder block includes a device body 1, an air nozzle 2 on the outer wall of the device body 1, an engine cylinder block placement platform 3 slidably connected to the outer wall of the device body 1, a swing rod 5 rotatably connected to the outer wall of the device body 1, a sliding rod 6 slidably connected to the outer wall of the swing rod 5 and the outer wall of the swing rod 5, a test flag 9 detachably connected to the outer wall of the sliding rod 6, a dust suction hood 10 fixedly connected to the outer wall of the sliding rod 6, a connecting pipe 11 fixedly connected to the outer wall of the dust suction hood 10, and a collection box 12 disposed on the outer wall of the device body 1 fixedly connected to one end of the connecting pipe 11.
[0024] like Figure 3 As shown, a servo motor 4 is provided on the outer wall of the main body 1 of the device, and the output end of the servo motor 4 is fixedly connected to the rotation center of the swing arm 5. This facilitates the convenient driving of the swing arm 5 to rotate through the servo motor 4.
[0025] like Figure 3 As shown, a limiting groove 7 is provided at the connection between the outer wall of the swing rod 5 and the sliding rod 6, and a sliding groove 8 is provided at the connection between the outer wall of the main body 1 and the sliding rod 6. This facilitates the effect of synchronously sliding and limiting the sliding rod 6 by opening the limiting groove 7 and the sliding groove 8.
[0026] like Figure 3 As shown, there are two sets of sliding rods 6 and limiting grooves 7. The positions of the two sets of sliding rods 6 and limiting grooves 7 are equidistant from the rotation center of the swing rod 5. This is beneficial to achieve the effect of driving the dust collection cover 10 and the detection flag 9 to be used alternately by setting two sets of sliding rods 6 and limiting grooves 7 with their positions equidistant from the rotation center of the swing rod 5.
[0027] like Figure 3As shown, the air nozzle 2 is positioned on the extension and retraction trajectory of the detection flag 9, which facilitates convenient observation of the sealing performance of the connection between the air nozzle 2 and the cylinder block.
[0028] like Figure 1 and Figure 2 As shown, there are two sets of dust collection hoods 10. The positions of the two sets of dust collection hoods 10 are symmetrical about the central axis of the engine block mounting platform 3. This is beneficial to achieve the effect of cleaning debris and dust from all directions on the mounting platform by setting two sets of dust collection hoods 10 with their positions symmetrical about the central axis of the engine block mounting platform 3.
[0029] like Figure 1 and Figure 2 As shown, the dust hood 10 is tilted towards the engine block mounting platform 3, which helps to achieve accurate dust cleaning of the working area of the mounting platform by tilting the dust hood 10 towards the engine block mounting platform 3.
[0030] like Figure 1 As shown, the connecting pipe 11 is made of flexible tubing. The outer wall of the main body 1 of the device is rotatably connected to a protective plate 13 located on one side of the air nozzle 2. This allows the air nozzle 2 to be conveniently shielded and protected after use by setting up the protective plate 13.
[0031] Working Principle: When using this airtightness testing device for engine cylinder blocks, to improve the switching effect of observing the airtightness of debris on the placement platform surface and the contact area between the air nozzle 2 and the cylinder block, when the generator cylinder block is placed on the placement platform for testing, the servo motor 4 is turned on, and the swing rod 5 rotates to drive the sliding rod 6 to slide synchronously along the inner wall of the limiting groove 7 and the sliding groove 8, and to drive the dust suction hood 10 and the detection flag 9 to slide relative to each other, so that the detection flag 9 moves to the contact area between the air nozzle 2 and the cylinder block. By observing whether the detection flag 9 moves, it is determined whether there is an air leak at the contact area between the air nozzle 2 and the cylinder block. At the same time, after the cylinder block is tested, the servo motor 4 is driven to move in the opposite direction, so that the dust suction hood 10 moves to one side of the placement platform to clean the debris on the surface of the placement platform, preventing debris adsorption and blockage, which would affect the accuracy of the airtightness test data.
[0032] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A device for testing the airtightness of an engine cylinder block, comprising a main body (1), characterized in that, The outer wall of the device body (1) is provided with an air nozzle (2), the outer wall of the device body (1) is slidably connected with an engine cylinder block placement platform (3), the outer wall of the device body (1) is rotatably connected with a swing rod (5), the outer wall of the swing rod (5) is slidably connected with a sliding rod (6) which is slidably connected to the outer wall of the device body (1), the outer wall of the sliding rod (6) is detachably connected with a detection flag (9), the outer wall of the sliding rod (6) is fixedly connected with a dust collection hood (10), the outer wall of the dust collection hood (10) is fixedly connected with a connecting pipe (11), and one end of the connecting pipe (11) is fixedly connected with a collection box (12) provided on the outer wall of the device body (1).
2. The airtightness testing device for engine cylinder blocks according to claim 1, characterized in that, The outer wall of the main body (1) of the device is provided with a servo motor (4), and the output end of the servo motor (4) is fixedly connected to the rotation center of the swing rod (5).
3. The airtightness testing device for engine cylinder blocks according to claim 1, characterized in that, A limiting groove (7) is provided at the connection between the outer wall of the swing rod (5) and the sliding rod (6), and a sliding groove (8) is provided at the connection between the outer wall of the main body (1) and the sliding rod (6).
4. The airtightness testing device for engine cylinder blocks according to claim 3, characterized in that, The sliding rod (6) and the limiting groove (7) are provided in two sets, and the positions of the two sets of sliding rods (6) and limiting grooves (7) are equidistant from the rotation center of the swing rod (5).
5. The airtightness testing device for engine cylinder blocks according to claim 1, characterized in that, The air nozzle (2) is positioned on the telescopic trajectory of the detection flag (9).
6. The airtightness testing device for engine cylinder blocks according to claim 1, characterized in that, Two sets of dust collection hoods (10) are provided, and the positions of the two sets of dust collection hoods (10) are symmetrical about the central axis of the engine block mounting platform (3).
7. The airtightness testing device for engine cylinder blocks according to claim 1, characterized in that, The dust hood (10) is inclined toward the engine block mounting platform (3).
8. The airtightness testing device for engine cylinder blocks according to claim 1, characterized in that, The connecting pipe (11) is made of a flexible hose, and the outer wall of the main body (1) of the device is rotatably connected to a protective plate (13) located on one side of the air nozzle (2).