Airtightness tool for chassis casting of bulldozer

Abstract

The utility model relates to the technical field of bulldozer chassis casting detection equipment, and provides a bulldozer chassis casting airtightness tool, which comprises a lower baffle plate, connecting columns are fixed at four corners of the top wall of the lower baffle plate, and positioning blocks are symmetrically fixed on the top wall of the lower baffle plate; the upper baffle is arranged above the lower baffle, the top ends of the connecting columns penetrate through the upper baffle in a sliding mode, nuts are connected to the top ends of the connecting columns in a threaded mode, two connecting pipes are symmetrically fixed to the top wall of the upper baffle, a pressure gauge is arranged on the connecting pipe on one side, and a pressure gauge is arranged on the connecting pipe on the other side. The other connecting pipe is connected with the output end of an external air compressor through an air guide pipe; by means of the technical scheme, the problems that in the prior art, in the using process of a bulldozer chassis casting, the casting leakage phenomenon often occurs, once leakage occurs, a chassis must be wholly dismantled, oil is completely poured out, the chassis is filled with water and then repaired, a large amount of manpower and material resources need to be consumed, and the cost is low are solved. And the production is greatly influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of bulldozer underframe casting detection equipment, in particular to an airtightness tooling for bulldozer underframe castings. Background Art

[0002] A bulldozer is a piece of machinery used for excavating and leveling the ground, and is widely used in construction and maintenance work in areas such as buildings, roads, and mines. The underframe of a bulldozer is a crucial component supporting the entire machine, and its material and structure have a significant impact on its performance and safety.

[0003] Bulldozer underframe castings are critical components of large bulldozer chassis. Because hydraulic oil is added to these components during use, leakage often occurs. Due to their unique nature, leaks must be completely dismantled, the oil removed, and then filled with water for repair. This requires significant manpower and resources, significantly impacting production. Research has shown that the primary cause of these leaks is defects in the castings, which are difficult to detect using existing detection methods. Subsequent welding and assembly of these products followed by the addition of hydraulic oil can lead to leakage in these defective areas. Utility Model Content

[0004] The utility model proposes an airtight tooling for a bulldozer underframe casting, which solves the problem that the bulldozer underframe casting in the related art often leaks during use. Once leakage occurs, due to its particularity, the underframe must be completely dismantled, the oil must be poured out, and the underframe must be filled with water for repair. This requires a large amount of manpower and material resources, which has a huge impact on production. The main cause of the leakage is defects on the casting, which are not easy to be detected by existing means. Subsequently, after these products are welded, assembled and hydraulic oil is added, leakage occurs at these defective parts.

[0005] The technical solution of the utility model is as follows:

[0006] Bulldozer underframe casting airtightness tooling includes:

[0007] A lower baffle, wherein the four corners of the top wall of the lower baffle are fixed with connecting columns, and the top wall of the lower baffle is symmetrically fixed with positioning blocks;

[0008] The upper baffle is installed above the lower baffle, the top ends of the connecting columns slide through the upper baffle, the top ends of the connecting columns are screwed with nuts, two connecting pipes are symmetrically fixed to the top wall of the upper baffle, one side of the connecting pipe is equipped with a pressure gauge, and the other side of the connecting pipe is connected to the output end of the external air compressor through an air guide pipe, a groove is opened on the bottom wall of the upper baffle, and a sealing gasket is fixed in the groove.

[0009] Preferably, the top wall of the groove is symmetrically provided with air guide holes, and the air guide holes are connected to corresponding connecting pipes.

[0010] Preferably, the connecting pipe and the upper baffle are integrally cast.

[0011] Preferably, the length of the lower baffle and the upper baffle is 847 mm, the width is 407 mm, and the thickness is 30 mm.

[0012] Preferably, the connecting column includes a column made of round steel, a threaded end is provided on the top of the column, the nut is screwed on the threaded end, a gasket is installed between the nut and the top wall of the upper baffle, and the gasket is slidably mounted on the column.

[0013] Preferably, the diameter of the connecting column is 40 mm, and the length of the connecting column is 755 mm.

[0014] Preferably, the top wall of the positioning block is arc-shaped, and a rubber pad is fixed to the top wall of the positioning block.

[0015] Preferably, mounting holes are provided at the four corners of the upper baffle, and the top of the connecting column is slidably mounted in the mounting holes.

[0016] The beneficial effects of the utility model are:

[0017] The upper baffle provided in the utility model is used to cooperate with the lower baffle to clamp and fix the bulldozer underframe casting, and the top of the bulldozer underframe casting is sealed by the provided nuts cooperating with the connecting columns. When fixing the upper baffle, the nuts are clamped evenly, and the two obliquely corresponding nuts are first screwed a distance, and then the other two obliquely corresponding nuts are screwed, and the two sets of nuts are tightened alternately, so as to ensure that the upper baffle can be stably fitted on the top of the bulldozer underframe casting, and the sealing gasket provided inside the groove can be tightly fitted on the top of the bulldozer underframe casting, avoiding the upper baffle being directly installed on the top blank surface of the bulldozer underframe casting, resulting in poor sealing, affecting the detection results. The overall device of the utility model has a simple structure and is easy to operate. It can effectively detect the air tightness problem of the bulldozer underframe casting and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a three-dimensional diagram of the top structure of the utility model;

[0020] Figure 2 This is a three-dimensional diagram of the bottom structure of the utility model;

[0021] Figure 3 This is a structural stereogram of the utility model in which the pressure gauge and the connecting pipe are separated;

[0022] Figure 4 This is a three-dimensional diagram of the bottom structure of the upper baffle of the utility model;

[0023] Figure 5 This is a three-dimensional diagram of the connecting column structure of the utility model.

[0024] In the figure: 1. Lower baffle; 2. Connecting column; 21. Column; 22. Threaded end; 3. Positioning block; 4. Upper baffle; 5. Nut; 6. Connecting pipe; 7. Pressure gauge; 8. Air guide pipe; 9. Air compressor; 10. Groove; 11. Sealing gasket; 12. Mounting hole; 13. Air guide hole; 14. Gasket. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, this embodiment proposes:

[0028] Bulldozer underframe casting airtightness tooling, including:

[0029] The lower baffle 1 has connecting columns 2 fixed at the four corners of the top wall of the lower baffle 1, and positioning blocks 3 are symmetrically fixed on the top wall of the lower baffle 1;

[0030] The upper baffle 4 is installed above the lower baffle 1. The top ends of the connecting columns 2 slide through the upper baffle 4. The top ends of the connecting columns 2 are screwed with nuts 5. Two connecting pipes 6 are symmetrically fixed to the top wall of the upper baffle 4. A pressure gauge 7 is installed on one side of the connecting pipe 6, and the connecting pipe 6 on the other side is connected to the output end of the external air compressor 9 through the air guide pipe 8. A groove 10 is opened on the bottom wall of the upper baffle 4, and a sealing gasket 11 is fixed in the groove 10.

[0031] Air guide holes 13 are symmetrically formed on the top wall of the groove 10 , and the air guide holes 13 are connected to the corresponding connecting pipes 6 .

[0032] The connecting pipe 6 and the upper baffle 4 are integrally cast.

[0033] The length of the lower baffle 1 and the upper baffle 4 is 847 mm, the width is 407 mm, and the thickness is 30 mm.

[0034] The top wall of the positioning block 3 is arc-shaped, and a rubber pad is fixed to the top wall of the positioning block 3 .

[0035] In this embodiment, the positioning block 3 provided on the lower baffle 1 is used to place the bulldozer underframe casting, which can ensure that the bulldozer underframe casting is placed in the middle position of the lower baffle 1. Since the bottom of the bulldozer underframe casting is curved, the top of the positioning block 3 is arranged in an arc shape. The rubber pad provided can prevent the bottom of the bulldozer underframe casting from being worn when the upper baffle 4 moves downward to clamp the bulldozer underframe casting. The upper baffle 4 is used to cooperate with the lower baffle 1 to clamp and fix the bulldozer underframe casting. The top of the bulldozer underframe casting is sealed by the provided nut 5 in conjunction with the connecting column 2. When fixing the upper baffle 4, the nut 5 is clamped evenly. The two obliquely corresponding nuts 5 are first screwed a distance, and then the other two obliquely corresponding nuts 5 are screwed. The two sets of nuts 5 are tightened alternately to ensure that the upper baffle 4 can be stably fitted on the top of the bulldozer underframe casting. The groove 10 provided at the bottom of the upper baffle 4 corresponds to the position of the channel at the top of the bulldozer chassis casting. During the installation of the upper baffle 4, the sealing gasket 11 provided inside the groove 10 can fit tightly against the top of the bulldozer chassis casting, preventing the upper baffle 4 from being directly installed on the top rough surface of the bulldozer chassis casting, which may cause a poor seal and affect the test results. The pressure gauge 7 provided is used to detect the internal pressure changes of the bulldozer chassis casting, thereby judging the air tightness of the bulldozer chassis casting. The pressure gauge 7 is screwed to the connecting pipe 6, which facilitates the installation and disassembly of the pressure gauge 7 when it is damaged. At the same time, a sealing ring is fixed at the connection position between the pressure gauge 7 and the connecting pipe 6 to ensure the sealing of the connection position. The air compressor 9 provided is used to compress external air and introduce the compressed air into the bulldozer chassis casting, which facilitates the air tightness detection of the bulldozer chassis casting in conjunction with the pressure gauge 7.

[0036] Example 2

[0037] like Figure 5 As shown, based on the same concept as the above embodiment 1, this embodiment further proposes:

[0038] The connecting column 2 includes a column 21 made of round steel, a threaded end 22 is provided on the top of the column 21, and the nut 5 is screwed on the threaded end 22. A gasket 14 is installed between the nut 5 and the top wall of the upper baffle 4, and the gasket 14 is slidably sleeved on the column 21.

[0039] The diameter of the connecting column 2 is 40 mm, and the length of the connecting column 2 is 755 mm.

[0040] The upper baffle 4 is provided with mounting holes 12 at four corners, and the top of the connecting column 2 is slidably mounted in the mounting holes 12 .

[0041] In this embodiment, the connecting column 2 is used to cooperate with the nut 5 to adjust the position of the upper baffle 4, thereby completing the blocking of the top of the bulldozer chassis casting. The washer 14 can achieve the purpose of preventing loosening after tightening the nut 5.

[0042] Working principle:

[0043] When using the present invention, the bulldozer underframe casting to be inspected is first placed between the two positioning blocks 3 and roughly adjusted so that the top channel is located below the bottom groove 10 of the upper baffle 4. The upper baffle 4 is then installed between the connecting posts 2, which are passed through the corresponding mounting holes 12. After installing the washers 14 on the connecting posts 2, the nuts 5 are screwed on. When tightening the nuts 5, the two obliquely corresponding nuts 5 are first turned a distance, and then the other two obliquely corresponding nuts 5 are turned, alternating between the two sets of nuts 5 to ensure that the upper baffle 4 can be stably attached to the top of the bulldozer underframe casting. After completing the installation of the upper baffle 4, the air compressor 9 is started and air is introduced into the bulldozer underframe casting through the air compressor 9 to maintain the air pressure within the bulldozer underframe casting at 0.2 MPa. The air pressure is observed for 2 minutes, and the airtightness of the bulldozer underframe casting is determined using the pressure gauge 7.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Bulldozer underframe casting airtightness tooling, characterized by: include: A lower baffle (1), wherein connecting columns (2) are fixed to the four corners of the top wall of the lower baffle (1), and positioning blocks (3) are symmetrically fixed to the top wall of the lower baffle (1); An upper baffle (4) is installed above the lower baffle (1), the top ends of the connecting columns (2) slide through the upper baffle (4), the top ends of the connecting columns (2) are screwed with nuts (5), two connecting pipes (6) are symmetrically fixed to the top wall of the upper baffle (4), a pressure gauge (7) is installed on one side of the connecting pipe (6), and the other side of the connecting pipe (6) is connected to the output end of the external air compressor (9) through the air guide pipe (8), and a groove (10) is opened on the bottom wall of the upper baffle (4), and a sealing gasket (11) is fixed in the groove (10).

2. The airtight tooling for bulldozer underframe casting according to claim 1, characterized in that: The top wall of the groove (10) is symmetrically provided with air guide holes (13), and the air guide holes (13) are connected to the corresponding connecting pipes (6).

3. The airtight tooling for bulldozer underframe casting according to claim 1, characterized in that: The connecting pipe (6) and the upper baffle (4) are integrally cast.

4. The airtight tooling for bulldozer underframe casting according to claim 1, characterized in that: The lower baffle (1) and the upper baffle (4) have a length of 847 mm, a width of 407 mm, and a thickness of 30 mm.

5. The airtight tooling for bulldozer underframe casting according to claim 1, characterized in that: The connecting column (2) includes a column (21) made of round steel, a threaded end (22) is provided at the top of the column (21), the nut (5) is screwed onto the threaded end (22), a gasket (14) is installed between the nut (5) and the top wall of the upper baffle (4), and the gasket (14) is slidably mounted on the column (21).

6. The airtight tooling for bulldozer underframe casting according to claim 5, characterized in that: The diameter of the connecting column (2) is 40 mm, and the length of the connecting column (2) is 755 mm.

7. The airtight tooling for bulldozer underframe casting according to claim 1, characterized in that: The top wall of the positioning block (3) is arc-shaped, and a rubber pad is fixed to the top wall of the positioning block (3).

8. The airtight tooling for bulldozer underframe casting according to claim 1, characterized in that: The upper baffle (4) is provided with mounting holes (12) at four corners, and the top of the connecting column (2) is slidably mounted in the mounting hole (12).

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