A cylinder block airtightness testing device

Abstract

This utility model provides a cylinder block airtightness testing device, relating to the field of airtightness testing technology, comprising: a support leg; a worktable above the support leg, two sets of positioning frames above the worktable, and a positioning hydraulic rod connecting the two sets of positioning frames; first hydraulic rods facing upwards on both sides of the worktable, and second hydraulic rods connecting inwards to the first hydraulic rods; a testing structure between the two sets of second hydraulic rods. This utility model can test cylinder blocks with openings of different sizes and shapes, improving the utilization rate of the device and solving the problem that existing devices cannot test cylinder blocks with openings of different sizes and shapes, resulting in low device utilization.

Description

Technical Field

[0001] This utility model belongs to the field of airtightness testing technology, and more specifically, it relates to a cylinder block airtightness testing device. Background Technology

[0002] Cylinder block airtightness testing plays a crucial role in engine maintenance and manufacturing, primarily due to the following aspects: First, it ensures engine performance and efficiency. Poor cylinder sealing leads to reduced compression pressure, resulting in incomplete combustion and directly interfering with engine power output. Airtightness testing allows for the timely detection of wear or leaks in components such as piston rings and valves, ensuring stable internal cylinder pressure and optimal combustion efficiency. Furthermore, leaks exacerbate fuel waste, as unburned mixtures or insufficient compression reduce combustion efficiency. Regular testing reduces fuel consumption and lowers operating costs. Secondly, it prevents malfunctions and extends engine life. Cylinder leaks can easily lead to engine overheating, abnormal wear on parts (such as scratches on the piston and cylinder wall), and in severe cases, even cylinder explosion. Cylinder tightness testing can detect these potential problems in advance, avoiding high repair costs. In addition, a well-sealed cylinder can reduce the corrosion of the crankcase by high-temperature gases, protecting the quality of the lubricating oil and thus slowing down the overall aging of the engine. However, current cylinder tightness testing devices cannot test cylinders with different sizes and shapes of openings, which affects the utilization rate of the devices. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a cylinder block airtightness testing device, which solves the problem that existing devices cannot test cylinder blocks with different sizes and shapes of openings, resulting in low device utilization.

[0004] This utility model discloses a cylinder block airtightness testing device, which is achieved by the following specific technical means:

[0005] A cylinder block airtightness testing device includes: a support leg; a worktable is provided above the support leg, two sets of positioning frames are provided above the worktable, and a positioning hydraulic rod is connected between the two sets of positioning frames; a first hydraulic rod is provided on both the left and right sides of the worktable, and the first hydraulic rod is connected to a second hydraulic rod inward; a support plate is provided at the connection position of the two sets of second hydraulic rods; a test structure is provided on the support plate; the test structure consists of an adjusting motor, an adjusting ring, a third hydraulic rod, a sealing plate, an air intake channel, a sealing ring, and a pressure sensor.

[0006] Furthermore, the positioning frame is designed as an L-shaped structure, with positioning hydraulic rods connected to the bottom of the positioning frame. A sliding groove is provided on the side of the worktable, and the positioning hydraulic rods extend into the sliding groove. The inner ends of the two sets of positioning hydraulic rods are connected inside the worktable. An anti-slip pad is provided at the contact position between the inner side of the positioning frame and the cylinder body.

[0007] Furthermore, a rotating groove is provided on the outer periphery of the side of the workbench, and a fourth hydraulic rod is provided at both the front and rear of the rotating groove. A small motor is provided at the upper end of the fourth hydraulic rod, and a fifth hydraulic rod is connected to the upper side of the small motor. A sealing head is provided on the inner side of the fifth hydraulic rod, and a threaded head is provided at the inner end of the fifth hydraulic rod. A threaded cylinder is provided at the outer end of the sealing head, and the sealing head and the fifth hydraulic rod are threadedly connected.

[0008] Furthermore, a set of fourth hydraulic rods is provided on both the front and rear sides of the worktable. The lower end of each fourth hydraulic rod is horizontally connected to a support rod. The inner end of the support rod is connected to a drive shaft. The lower end of the drive shaft is connected to a drive motor. The upper end of the drive shaft is provided with a bearing.

[0009] Furthermore, an adjustment motor is provided above the support plate, and a drive shaft is provided below the adjustment motor. The lower end of the drive shaft passes through the support plate and connects to the adjustment ring. The edge of the adjustment ring is connected downward to the third hydraulic rod. A sealing plate is provided below the third hydraulic rod. A threaded cylinder is provided on the upper side of the sealing plate, and a threaded head is provided at the lower end of the third hydraulic rod. The two are threadedly connected. A sealing ring is provided on the lower side of the sealing plate. An annular sealing groove is provided on the sealing ring. An air intake channel and a pressure sensor are provided in the internal area of ​​the sealing ring.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This utility model increases the friction between the positioning frame and the cylinder body by setting an anti-slip pad, which can more effectively fix and accurately position the cylinder body.

[0012] 2. By setting a threaded head and a threaded cylinder, this utility model allows for flexible replacement of sealing heads and sealing plates of different sizes and shapes according to the openings on the cylinder body, thus enabling it to be applicable to the testing of various cylinder bodies.

[0013] 3. By setting a sealing ring and a sealing groove, the opening at the top of the cylinder body is placed in the sealing groove, allowing the sealing ring to completely cover the opening, thus achieving a better sealing effect and making the test data more accurate.

[0014] 4. This utility model uses a pressure sensor to charge the cylinder with constant pressure through the intake pipe. When the pressure sensor detects that the pressure inside the cylinder is lower than the specified value, it will issue a corresponding prompt in time. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0017] Figure 3 This is an exploded structural diagram of the present invention.

[0018] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 5 This is a schematic diagram of the sealing plate structure of this utility model.

[0020] Figure 6 This is a schematic diagram of the sealing head structure of this utility model.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Support legs;

[0023] 2. Workbench;

[0024] 3. Rotating groove; 301. Sliding groove;

[0025] 4. First hydraulic rod; 401. Second hydraulic rod; 402. Support plate;

[0026] 5. Sealing plate; 501. Third hydraulic rod;

[0027] 6. Adjust the motor; 601. Adjusting ring;

[0028] 7. Air intake passage;

[0029] 8. Fourth hydraulic rod; 801. Fifth hydraulic rod; 8011. Small motor; 8012. Threaded head; 802. Support rod; 803. Drive motor;

[0030] 9. Sealing head; 901. Threaded cylinder;

[0031] 10. Positioning frame; 1001. Positioning hydraulic rod;

[0032] 11. Anti-slip mat;

[0033] 12. Sealing ring; 1201. Sealing groove;

[0034] 13. Barometric pressure sensor. Detailed Implementation

[0035] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0036] Example:

[0037] As attached Figure 1 To be continued Figure 6 As shown:

[0038] This utility model provides a cylinder block airtightness testing device, including: a support leg 1; a workbench 2 is provided above the support leg 1, and two sets of positioning frames 10 are provided above the workbench 2. The two sets of positioning frames 10 are connected by a positioning hydraulic rod 1001. First hydraulic rods 4 are provided on the left and right sides of the workbench 2, and the first hydraulic rods 4 are connected to second hydraulic rods 401 inward. A support plate 402 is provided at the connection position of the two sets of second hydraulic rods 401. A testing structure is provided on the support plate 402. The testing structure consists of an adjusting motor 6, an adjusting ring 601, a third hydraulic rod 501, a sealing plate 5, an air intake channel 7, a sealing ring 12, and a pressure sensor 13.

[0039] Among them, such as Figure 3 and Figure 4 As shown, the positioning frame 10 is designed with an L-shaped structure. Positioning hydraulic rods 1001 are connected to the bottom of the positioning frame 10. A sliding groove 301 is provided on the upper side of the worktable 2. The positioning hydraulic rods 1001 extend into the sliding groove 301. The inner ends of the two sets of positioning hydraulic rods 1001 are connected inside the worktable 2. An anti-slip pad 11 is provided at the contact position between the inner side of the positioning frame 10 and the cylinder body to increase the friction between the positioning frame 10 and the cylinder body. This allows for more effective fixation and precise positioning of the cylinder body.

[0040] Among them, such as Figures 4 to 6As shown, the upper outer periphery of the workbench 2 is provided with a rotating groove 3. A fourth hydraulic rod 8 is provided at both the front and rear of the rotating groove 3. A small motor 8011 is provided at the upper end of the fourth hydraulic rod 8. A fifth hydraulic rod 801 is connected to the upper side of the small motor 8011. A sealing head 9 is provided inside the fifth hydraulic rod 801. A threaded head 8012 is provided at the inner end of the fifth hydraulic rod 801. A threaded cylinder 901 is provided at the outer end of the sealing head 9. The sealing head 9 and the fifth hydraulic rod 801 are threadedly connected. A set of fourth hydraulic rods 8 is provided on both the front and rear sides of the workbench 2. A support rod 802 is horizontally connected to the lower end of each fourth hydraulic rod 8. A drive shaft is connected to the inner end of the support rod 802. A drive motor 803 is connected to the lower end of the drive shaft. A bearing is provided at the upper end of the drive shaft. An adjusting motor 6 is provided above the support plate 402. A drive shaft is provided below the adjusting motor 6. The lower end of the drive shaft passes through the support plate 402 and connects to an adjusting ring 601. The edge of the adjusting ring 601 is connected downwards to a third hydraulic rod 501. A sealing plate 5 is provided below, and a threaded cylinder 901 is provided on the upper side of the sealing plate 5. A threaded head 8012 is provided at the lower end of the third hydraulic rod 501. The two are connected by threads. By setting the threaded head 8012 and the threaded cylinder 901, it is convenient to flexibly replace the sealing head 9 and the sealing plate 5 of different sizes and shapes according to the opening on the cylinder body, so that it can be used for testing various cylinder bodies. A sealing ring 12 is provided on the lower side of the sealing plate 5. The sealing ring 12 has an annular sealing groove 1201. The opening at the top of the cylinder body is placed in the sealing groove, so that the sealing ring can completely cover the opening, which can obtain a better sealing effect and make the test data more accurate. The internal area of ​​the sealing ring 12 is provided with an air intake channel 7 and a pressure sensor 13. The air intake channel 7 is responsible for the constant pressure inflation operation into the cylinder body. When the pressure sensor 12 detects that the pressure value inside the cylinder body is lower than the specified value, it will issue a corresponding prompt in time.

[0041] The specific usage and function of this embodiment are as follows:

[0042] In this invention, a suitable sealing head 9 and sealing plate 5 are selected for installation. The cylinder body is placed in the middle of the workbench 2. The positioning hydraulic rod 1001 is controlled to retract, so that the positioning frame 10 clamps and fixes the cylinder body. The drive motor 8003 is controlled to rotate, so that the sealing head 9 moves to the side opening of the cylinder body. The fourth hydraulic rod 8 is controlled to extend and retract, so that the sealing head 9 is adjusted to a suitable height. The small motor 8011 is controlled to rotate the angle of the sealing head 9 so that it is aligned with the side opening of the cylinder body. The fifth hydraulic rod 801 is controlled to extend, so that the sealing head 9 blocks the side opening. The second hydraulic rod 401 is controlled to adjust the position of the sealing plate 5. The adjusting motor 6 is controlled to rotate the angle of the sealing plate 5. The first hydraulic rod 4 and the third hydraulic rod 501 are controlled to extend, so that the sealing plate 5 seals the upper opening of the cylinder body. The air intake pipe 7 is connected to the external air supply pipe to pressurize the gas inside the cylinder body. When the pressure is increased to a certain level, it stops and stands still. When the air pressure sensor 12 detects that the air pressure inside the cylinder body is lower than the specified value, it will issue a corresponding prompt in time.

[0043] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

Claims

1. A cylinder block air tightness testing apparatus comprising: Outrigger (1); characterized in that: a workbench (2) is provided above the outrigger (1), two sets of positioning frames (10) are provided above the workbench (2), and a positioning hydraulic rod (1001) is provided between the two sets of positioning frames (10). The left and right sides of the workbench (2) are provided with a first hydraulic rod (4) facing upwards. The first hydraulic rod (4) is connected to a second hydraulic rod (401) inwards. A support plate (402) is provided at the connection position of the two sets of second hydraulic rods (401). The test structure is set on the support plate (402). The test structure consists of an adjusting motor (6), an adjusting ring (601), a third hydraulic rod (501), a sealing plate (5), an air intake channel (7), a sealing ring (12), and a pressure sensor (13).

2. A cylinder block air tightness testing apparatus as claimed in claim 1, wherein: The positioning frame (10) is designed as an L-shaped structure. The positioning frame (10) is connected to the bottom of the positioning hydraulic rod (1001). The upper side of the worktable (2) is provided with a sliding groove (301). The positioning hydraulic rod (1001) extends into the sliding groove (301). The inner ends of the two sets of positioning hydraulic rods (1001) are connected inside the worktable (2). The inner side of the positioning frame (10) is provided with an anti-slip pad (11) at the contact position between the cylinder body and the inner side of the cylinder.

3. A cylinder block air tightness testing apparatus as claimed in claim 1, wherein: The workbench (2) has a rotating groove (3) on the outer periphery of its upper side. The rotating groove (3) has a fourth hydraulic rod (8) at both the front and rear. The upper end of the fourth hydraulic rod (8) has a small motor (8011). The upper side of the small motor (8011) is connected to a fifth hydraulic rod (801). The inner side of the fifth hydraulic rod (801) has a sealing head (9). The inner end of the fifth hydraulic rod (801) has a threaded head (8012). The outer end of the sealing head (9) has a threaded cylinder (901). The sealing head (9) and the fifth hydraulic rod (801) are threadedly connected.

4. A cylinder block air tightness testing apparatus as claimed in claim 1, wherein: The workbench (2) is provided with a set of fourth hydraulic rods (8) on both the left and right sides. The lower end of each fourth hydraulic rod (8) is connected to a support rod (802) horizontally. The inner end of the support rod (802) is connected to a drive shaft. The lower end of the drive shaft is connected to a drive motor (803). The upper end of the drive shaft is provided with a bearing.

5. A cylinder block air tightness testing apparatus as claimed in claim 1, wherein: An adjustment motor (6) is provided above the support plate (402). An active shaft is provided on the lower side of the adjustment motor (6). The lower end of the active shaft passes through the support plate (402) and connects to the adjustment ring (601). The edge of the adjustment ring (601) is connected downward to the third hydraulic rod (501). A sealing plate (5) is provided below the third hydraulic rod (501). A threaded cylinder (901) is provided on the upper side of the sealing plate (5). A threaded head (8012) is provided at the lower end of the third hydraulic rod (501). The two are threadedly connected. A sealing ring (12) is provided on the lower side of the sealing plate (5). An annular sealing groove (1201) is provided on the sealing ring (12). An air intake channel (7) and a pressure sensor (13) are provided in the inner area of ​​the sealing ring (12).

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