A bearing cover water test pressing tool

Abstract

The utility model belongs to bearing cap detection technical field, a kind of bearing cap water test pressing tool belongs to.Bearing cap detection technical field is provided in the utility model, and the utility model discloses a base plate, positioning block, guide positioning pin, profiled sealing ring, pressing mechanism and pressing test mechanism, positioning block is installed on the upper surface of base plate, its top surface is provided with the profiled structure compatible with the bearing cap to be detected, the profiled structure is opened with the sealing groove corresponding with bearing cap oil channel, guide positioning pin is fixed on positioning block, and it is stretched out upward, for with the positioning pin hole of bearing cap cooperation realizes accurate positioning, profiled sealing ring is embedded in sealing groove, for forming sealing between positioning block and bearing cap oil channel, pressing mechanism is erected on the top of base plate, and pressing mechanism can be lifted and bearing cap is pressed by its pressure rod.The utility model can avoid the quality hidden trouble caused by workpiece deformation and detection misjudgment to product due to the unreasonable sealing structure.

Description

Technical Field

[0001] This utility model belongs to the field of bearing cover testing technology, specifically relating to a bearing cover water test pressure tool. Background Technology

[0002] In mechanical manufacturing, smaller die-cast bearing caps typically have internal oil channels with φ2 small holes and φ8 large holes communicating with them, and their sealing performance is crucial. However, for small aluminum alloy bearing caps that are lightweight and require high flatness, their shape involves right-angle seals between semi-circular holes and flat surfaces. Existing testing fixtures for airtightness testing have significant defects: First, if the fixture's positioning method is poor or the clamping force is applied improperly, it can easily cause deformation of thin-walled workpieces, affecting product accuracy; second, for the right-angle seals formed by the semi-circular holes and flat surfaces on the workpiece, conventional sealing structures are unstable and prone to misjudgment due to incomplete sealing. Utility Model Content

[0003] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a bearing cover water testing and pressure testing fixture. This invention can avoid the quality risks to products caused by workpiece deformation and misjudgment due to unreasonable sealing structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] This utility model provides a bearing cap water test pressure fixture, characterized in that it includes a base plate, a positioning block, a guide positioning pin, a contour sealing ring, a clamping mechanism, and a pressure testing mechanism. The positioning block is installed on the upper surface of the base plate, and its top surface is provided with a contour structure adapted to the bearing cap to be tested. The contour structure has a sealing groove corresponding to the oil passage of the bearing cap. The guide positioning pin is fixed to the positioning block and extends upward to cooperate with the positioning pin hole of the bearing cap for precise positioning. The contour sealing ring is embedded in the sealing groove to form a seal between the positioning block and the oil passage of the bearing cap. The clamping mechanism is mounted on... Above the substrate, the clamping mechanism can be raised and lowered and presses the bearing cover with its pressure rod. The pressure testing mechanism is set on the clamping mechanism and can be raised and lowered with it. The pressure testing mechanism includes a sealing air inlet head, a sealing head, and a pressure gauge. Both the sealing air inlet head and the sealing head are hollow and have air passages. The bottom of the sealing air inlet head has an air inlet corresponding to the φ8 large hole of the bearing cover and a test hole corresponding to a φ2 small hole. The bottom of the sealing head has a test hole corresponding to another φ2 small hole. The pressure gauge is connected to the internal air passages of the sealing air inlet head and the sealing head through connecting pipes.

[0006] Furthermore, the clamping mechanism also includes a cylinder, a mounting bracket, and a lifting plate. The mounting bracket is fixedly erected on the base plate. The cylinder is mounted on the top of the mounting bracket with its piston rod extending vertically downward. The piston rod of the cylinder is connected to the lifting plate. The pressure rod is connected below the lifting plate. The sealing air inlet head, the sealing head, and the pressure gauge are all connected to the lifting plate.

[0007] Furthermore, the mounting frame consists of multiple support columns vertically fixed to the base plate and a top plate connecting the tops of all the support columns, with the cylinder connected to the top plate.

[0008] Furthermore, guide rods are connected to both ends of the lifting plate. The guide rods pass through the top plate and can move axially, thus guiding the displacement of the lifting plate.

[0009] Furthermore, both the sealing air inlet head and the lower end of the sealing head are provided with irregularly shaped rubber rings. When the sealing air inlet head and the sealing head are pressed down, the irregularly shaped rubber rings are compressed and deformed to achieve a seal with the bearing cover.

[0010] The beneficial effects of this utility model.

[0011] This invention completely avoids the quality risks to products caused by workpiece deformation and misjudgment due to unreasonable sealing structure during operation. The tooling is reasonably designed, simple in structure, and has low sealing ring cost. At the same time, it solves the technical breakthrough of unstable detection of right-angle sealing form for small bearing cover parts, which reduces labor costs and saves quality costs. Attached Figure Description

[0012] To make the technical problems solved, the technical solutions, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0013] Figure 1 This is a structural schematic diagram of the present invention in its initial state.

[0014] Figure 2 This is a structural schematic diagram of the present invention with the bearing cover (half-section) in place.

[0015] Figure 3 This is a bottom view of the structure of this utility model.

[0016] The markings in the diagram are as follows: 1 is the base plate, 2 is the positioning block, 3 is the guide positioning pin, 4 is the contour sealing ring, 5 is the pressure rod, 6 is the sealing air inlet pressure head, 7 is the sealing pressure head, 8 is the pressure gauge, 9 is the air inlet, 10 is the test hole, 11 is the cylinder, 12 is the lifting plate, 13 is the support column, 14 is the top plate, 15 is the guide rod, 16 is the irregular rubber ring, 17 is the bearing cover, 18 is the φ8 large hole, and 19 is the φ2 small hole. Detailed Implementation

[0017] As shown in the accompanying drawings, this embodiment provides a bearing cover water test pressure fixture, including a base plate 1, a positioning block 2, a guide positioning pin 3, a contour sealing ring 4, a clamping mechanism, and a pressure testing mechanism.

[0018] The positioning block 2 is firmly installed on the center of the upper surface of the base plate 1 by bolts. Its top surface is provided with a contour structure that matches the bearing cover 17 to be tested. The contour structure has a sealing groove corresponding to the oil passage of the bearing cover 17. The contour sealing ring 4 is embedded in the sealing groove to form a seal between the positioning block 2 and the oil passage of the bearing cover 17.

[0019] Two guide positioning pins 3 are fixed on the positioning block 2 and extend upward to cooperate with the positioning pin holes of the bearing cover 17 to achieve precise positioning. It should be noted that the guide positioning block 2 itself does not have an air intake channel; its core function is positioning and bottom sealing.

[0020] The clamping mechanism is mounted above the base plate 1. The clamping mechanism includes a pressure rod 5, a cylinder 11, a mounting frame, and a lifting plate 12. The mounting frame consists of multiple support columns 13 vertically fixed to the base plate 1 and a top plate 14 connecting the tops of all the support columns 13. The cylinder 11 is mounted on the top plate 14 with its piston rod extending vertically downwards. The piston rod of the cylinder 11 is connected to the lifting plate 12. The pressure rod 5 is connected below the lifting plate 12. The clamping mechanism can move up and down and clamp the bearing cover 17 through its pressure rod 5. Guide rods 15 are connected to both ends of the lifting plate 12. The guide rods 15 pass through the top plate 14 and can move axially, guiding the displacement of the lifting plate 12.

[0021] The pressure testing mechanism is set on the clamping mechanism and can rise and fall with it. The pressure testing mechanism includes a sealing air inlet head 6, a sealing head 7, and a pressure gauge 8. The sealing air inlet head 6, the sealing head 7, and the pressure gauge 8 are all connected to the lifting plate 12.

[0022] Both the sealed air inlet head 6 and the sealed head 7 are hollow and have air passages. The bottom of the sealed air inlet head 6 has an air inlet hole 9 corresponding to the large hole 18 of the bearing cover 17 (φ8) and a test hole 10 corresponding to a small hole 19 of φ2. The bottom of the sealed head 7 has another test hole 10 corresponding to another small hole 19 of φ2. The pressure gauge 8 is connected to the internal air passages of the sealed air inlet head 6 and the sealed head 7 through connecting pipes.

[0023] Both the sealing inlet pressure head 6 and the sealing pressure head 7 are provided with irregularly shaped rubber rings 16 at their lower ends. When the sealing inlet pressure head 6 and the sealing pressure head 7 are pressed down, the irregularly shaped rubber rings are compressed and deformed to achieve a seal with the bearing cover 17.

[0024] The process of performing water pressure testing on this fixture is as follows: 1. Place the bearing cover 17: The operator holds the bearing cover 17, aligning the two locating pin holes at its bottom with the two guide locating pins 3, and then lowers the bearing cover 17. The workpiece is accurately positioned under the guidance of the guide locating pins 3, and the oil passage on its bottom surface corresponds to the contour seal ring 4 on the locating block 2.

[0025] 2. Pressing the bearing cover 17: Start the cylinder 11, its piston rod extends downward, driving the lifting plate 12 to move downward. When the pressure rod 5 presses down, it presses against the upper surface of the bearing cover 17. The irregular rubber rings at the lower ends of the sealing air inlet pressure head 6 and sealing pressure head 7 first press and seal the φ2 small hole 19 and φ8 large hole 18 at the top of the workpiece. At the same time, the bottom of the bearing cover 17 is also pressed against the contour sealing ring 4 of the positioning block 2, forming a bottom seal.

[0026] 3. Inflation test: Place the entire fixture with the compressed bearing cover 17 into a water tank and fill the tank with water to submerge the workpiece. Inflate the workpiece by filling the air passage inside the sealed air inlet head 6 with gas. The gas enters the oil passage inside the bearing cover 17 directly through the sealed φ8 large hole 18, flows out through the oil passage and φ2 small hole 19, and passes through the sealed pressure head 7. Monitor the pressure with pressure gauge 8 and observe the pressure gauge value to confirm that the φ2 small hole 19 is connected to the oil tank. Maintain the pressure for a period of time and observe whether there are continuous bubbles on the surface of the bearing cover 17. If there are no bubbles, the airtightness of the workpiece is deemed to be qualified.

[0027] 4. Remove bearing cover 17: After the inspection is completed, the piston rod of cylinder 11 retracts, driving the pressure rod 5 to rise, releasing the pressure and seal on the workpiece, and the operator can then remove the inspected bearing cover 17.

[0028] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A bearing cover water test pressure testing fixture, characterized in that, The system includes a base plate (1), a positioning block (2), a guide positioning pin (3), a contour sealing ring (4), a clamping mechanism, and a pressure testing mechanism. The positioning block (2) is installed on the upper surface of the base plate (1), and its top surface is provided with a contour structure adapted to the bearing cover (17) to be tested. The contour structure has a sealing groove corresponding to the oil passage of the bearing cover (17). The guide positioning pin (3) is fixed on the positioning block (2) and extends upward to cooperate with the positioning pin hole of the bearing cover (17) to achieve precise positioning. The contour sealing ring (4) is embedded in the sealing groove to form a seal between the positioning block (2) and the oil passage of the bearing cover (17). The clamping mechanism is mounted above the base plate (1) and can be raised and lowered and pass through. The bearing cover (17) is pressed by the pressure rod (5). The pressure testing mechanism is set on the pressing mechanism and can rise and fall with it. The pressure testing mechanism includes a sealed air inlet head (6), a sealed head (7) and a pressure gauge (8). The sealed air inlet head (6) and the sealed head (7) are hollow and have air passages. The bottom of the sealed air inlet head (6) has an air inlet hole (9) corresponding to the φ8 large hole (18) of the bearing cover (17) and a test hole (10) corresponding to a φ2 small hole (19). The bottom of the sealed head (7) has a test hole (10) corresponding to another φ2 small hole (19). The pressure gauge (8) is connected to the internal air passages of the sealed air inlet head (6) and the sealed head (7) through connecting pipes.

2. The bearing cover water pressure testing fixture according to claim 1, characterized in that, The clamping mechanism also includes a cylinder (11), a mounting frame and a lifting plate (12). The mounting frame is fixedly erected on the base plate (1). The cylinder (11) is installed on the top of the mounting frame with the piston rod extending vertically downward. The piston rod of the cylinder (11) is connected to the lifting plate (12). The pressure rod (5) is connected below the lifting plate (12). The sealing air inlet pressure head (6), the sealing pressure head (7) and the pressure gauge (8) are all connected to the lifting plate (12).

3. The bearing cover water pressure testing fixture according to claim 2, characterized in that, The mounting frame consists of multiple support columns (13) vertically fixed to the base plate (1) and a top plate (14) connecting the tops of all the support columns (13), and the cylinder (11) is connected to the top plate (14).

4. The bearing cover water pressure testing fixture according to claim 3, characterized in that, The lifting plate (12) is connected to guide rods (15) at both ends. The guide rods (15) pass through the top plate (14) and can move axially, thus guiding the displacement of the lifting plate (12).

5. The bearing cover water pressure testing fixture according to claim 1, characterized in that, Both the sealing air inlet head (6) and the sealing head (7) are provided with irregularly shaped rubber rings (16) at their lower ends. When the sealing air inlet head (6) and the sealing head (7) are pressed down, the irregularly shaped rubber rings are compressed and deformed to achieve a seal with the bearing cover (17).

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