Engine crankshaft oil seal airtightness detection device

Abstract

The utility model provides an engine crankshaft oil seal airtightness detection device, which relates to the technical field of oil seal airtightness detection and comprises a bottom frame, a bottom plate is fixedly connected to the top of the bottom frame, vertical columns are fixedly connected to the corners of the top of the bottom plate, and a top plate is fixedly connected between the upper end faces of the plurality of vertical columns. The bottom of the top plate is fixedly connected with an electric push rod. According to the oil seal air tightness detection device, when air tightness detection is carried out on the oil seal and after leakage detection is completed, the air extracting pump is started to extract air into the sealing box through connection of the air extracting pipe, after negative pressure is generated through air extraction in the sealing box, the oil seal can be adsorbed and fixed from the attaching position of the rubber ring and the oil seal, and when the electric push rod shrinks and resets, the air extracting pump is started. And the oil seal in an adsorbed and fixed state can be taken out from the bottom box, the problem that the oil seal is difficult to take out after detection is completed is avoided, and the convenience of material taking operation of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil seal airtightness detection, in particular to an engine crankshaft oil seal airtightness detection device. Background Art

[0002] The engine crankshaft oil seal air tightness detection is mainly to ensure that the crankshaft oil seal has good sealing performance and prevent oil leakage in the crankcase.

[0003] In the prior art, such as the Chinese patent CN 218937672 U, an engine crankshaft oil seal airtightness detection device comprises: a detection plate, a "convex" gas channel is provided inside, one end of the gas channel penetrates the side wall of the detection plate and is connected to an air intake pipe, and a sealing cover is located directly above the detection plate. When the device detects the crankshaft oil seal, the crankshaft oil seal is first inserted into the oil seal sealing shaft, and then the ring is fastened to the crankshaft oil seal through the threaded adjustment handle to complete the fixation of the crankshaft oil seal. At this time, the cylinder descends and drives the sealing cover to buckle on the detection plate. At this time, air is introduced inward to increase the air pressure inside the gas channel until the air pressure reaches the test pressure, and then the pressure is stabilized for a period of time. During the process of stabilizing the pressure, the sealing part of the crankshaft oil seal is detected by the ultrasonic leak detector. The above method saves the time of putting the detection device into water, taking it out of water and cleaning it, which can greatly reduce the time spent on detection and improve the detection efficiency.

[0004] In the above patent, although the detection device can greatly reduce the time spent on detection, when the oil seal is tested for sealing, the oil seal needs to be sleeved on the outside of the sealing shaft and pressed and fixed for testing. After the detection work is completed, the oil seal is tightly sleeved on the outside of the sealing shaft. It is more laborious to remove the oil seal when it is needed. Usually, the oil seal needs to be lifted out with the help of tools, which can easily cause damage to the oil seal and make the operation of the device more inconvenient. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that when the oil seal is tested for its tightness, the oil seal needs to be sleeved on the outside of the sealing shaft and pressed and fixed for testing. After the testing work is completed, the oil seal is tightly sleeved on the outside of the sealing shaft, and it is rather laborious to remove the oil seal. Usually, the oil seal needs to be lifted out with the help of tools, which can easily cause damage to the oil seal and make the operation of the device inconvenient. An engine crankshaft oil seal airtightness testing device is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an engine crankshaft oil seal airtightness detection device, comprising: a base frame, a base plate is fixedly connected to the top of the base frame, columns are fixedly connected to the top corners of the base plate, a top plate is fixedly connected between the upper end surfaces of multiple columns, and an electric push rod is fixedly connected to the bottom of the top plate; a placement component, the placement component is fixedly connected to the top of the base plate, the placement component comprises a bottom box and an air pump, the output end of the air pump is fixedly connected to an air pipe, and the air pipe is fixedly connected to the bottom box; a detection component, the detection component is fixedly connected to the lower end surface of the electric push rod, the detection component comprises a sealing box, a plurality of springs are evenly fixedly connected to the top of the sealing box, a pressure ring is fixedly connected between the lower end surfaces of the multiple springs, a plurality of through holes are evenly opened at the bottom of the pressure ring, and rubber rings are arranged near the through holes at the bottom of the pressure ring.

[0007] Preferably, a sealing shaft is fixedly connected to the bottom of the bottom box, and a retaining ring is fixedly connected to the inner surface of the bottom box.

[0008] Preferably, a photoelectric switch is fixedly connected to the bottom of the bottom box, and the photoelectric switch is electrically connected to the electric push rod and the air pump.

[0009] Preferably, the pressure ring matches the position of the sealing shaft, and the pressure ring is located at the lower side of the sealing box.

[0010] Preferably, a leakage detection sensor is fixedly connected to the top of the sealing box, and the sealing box and the bottom box are matched.

[0011] Preferably, the top of the sealing box is fixedly connected to an air pump, and the output end of the air pump is fixedly connected to an air extraction pipe.

[0012] Preferably, the vacuum pump is fixedly connected to the sealing box, and the vacuum pump and the sealing box are connected.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, when the air tightness test of the oil seal is carried out, after the leakage test is completed, the vacuum pump is started to evacuate air into the sealing box through the connection of the vacuum pipe. After the air is evacuated in the sealing box to generate negative pressure, the oil seal can be adsorbed and fixed from the fitting position of the rubber ring and the oil seal. When the electric push rod is retracted and reset, the oil seal in the adsorbed and fixed state can be taken out of the bottom box, avoiding the problem that the oil seal is difficult to take out after the test is completed, thereby improving the convenience of the device's material taking operation.

[0015] 2. In the utility model, after the oil seal is placed on the outer side of the sealing shaft, the photoelectric switch signal is blocked, indicating that the workpiece is in place. The electric push rod can be controlled to run for detection, thereby achieving the purpose of improving the degree of automation of the device and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A stereoscopic diagram of an engine crankshaft oil seal airtightness detection device is provided for the utility model;

[0017] Figure 2 A bottom view of an engine crankshaft oil seal airtightness detection device is provided for the utility model;

[0018] Figure 3 The utility model provides a schematic diagram of the structure of a placement component of an engine crankshaft oil seal airtightness detection device;

[0019] Figure 4 The utility model provides a structural schematic diagram of a detection component of an engine crankshaft oil seal airtightness detection device.

[0020] Legend: 1. Base frame; 2. Bottom plate; 3. Post; 4. Top plate; 5. Electric push rod; 6. Placement component; 601. Bottom box; 602. Air blowing pipe; 603. Air blowing pump; 604. Sealing shaft; 605. Retaining ring; 606. Photoelectric switch; 7. Detection component; 701. Sealing box; 702. Spring; 703. Pressing ring; 704. Rubber ring; 705. Leak detection sensor; 706. Air pump; 707. Air blowing pipe. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment 1, as Figure 1-Figure 4As shown, the utility model provides an engine crankshaft oil seal airtightness detection device, comprising: a base frame 1, a base plate 2 is fixedly connected to the top of the base frame 1, columns 3 are fixedly connected to the top corners of the base plate 2, a top plate 4 is fixedly connected between the upper end surfaces of multiple columns 3, and an electric push rod 5 is fixedly connected to the bottom of the top plate 4; a placement component 6, the placement component 6 is fixedly connected to the top of the base plate 2, the placement component 6 includes a bottom box 601 and an air pump 603, an air blowing pipe 602 is fixedly connected to the output end of the air pump 603, and the air blowing pipe 602 is fixedly connected to the bottom box 601; a detection component 7, the detection component 7 is fixedly connected to the lower end surface of the electric push rod 5, the detection component 7 includes a sealing box 701, and a plurality of springs 702 are evenly fixedly connected to the top of the sealing box 701. A pressure ring 703 is fixedly connected between the lower end surfaces, a plurality of through holes are evenly opened at the bottom of the pressure ring 703, and rubber rings 704 are arranged near the through holes at the bottom of the pressure ring 703. A sealing shaft 604 is fixedly connected to the bottom of the bottom box 601, and a retaining ring 605 is fixedly connected to the inner surface of the bottom box 601. The pressure ring 703 matches the position of the sealing shaft 604, and the pressure ring 703 is located at the lower side of the sealing box 701. A leakage detection sensor 705 is fixedly connected to the top of the sealing box 701. The sealing box 701 and the bottom box 601 are matched with each other, and an air pump 706 is fixedly connected to the top of the sealing box 701. An air pump 707 is fixedly connected to the output end of the air pump 706. The air pump 706 is fixedly connected to the sealing box 701, and the air pump 706 and the sealing box 701 are connected.

[0024] The effect achieved by the entire embodiment 1 is that, when the air tightness test of the oil seal is performed, the oil seal is sleeved on the outer side of the sealing shaft 604 and supported by the retaining ring 605 at the bottom, the oil seal is installed, and then the electric push rod 5 is started to extend. The extension of the electric push rod 5 can drive the sealing box 701 to move down to a state of docking and fitting with the bottom box 601, and a closed space is formed between the sealing box 701 and the bottom box 601. When the sealing box 701 moves down, the pressure ring 703 is driven to press on the surface of the oil seal. As the sealing box 701 continues to move down, the compression spring 702 contracts, and the resilience of the spring 702 is used to make the pressure ring 703 firmly limit the position of the oil seal, and then the air pump 603 is started, and the air pump 60 After starting, air is blown into the bottom box 601 through the connection of the air blowing pipe 602. If the oil seal has poor sealing performance, the air flow will pass through the oil seal and flow into the sealing box 701. The use of the leakage detection sensor 705 can determine whether the oil seal is leaking. After the leakage detection is completed, the air pump 706 is started to evacuate air into the sealing box 701 through the connection of the air evacuation pipe 707. After the air is evacuated in the sealing box 701 to generate negative pressure, the rubber ring 704 and the oil seal can be attached to the fitting position to fix the oil seal. When the electric push rod 5 is retracted and reset, the oil seal in the adsorbed and fixed state can be taken out of the bottom box 601, avoiding the problem that the oil seal is difficult to remove after the detection is completed, thereby improving the convenience of the device's material removal operation.

[0025] Embodiment 2, as Figure 1-Figure 4 As shown, a photoelectric switch 606 is fixedly connected to the bottom of the bottom box 601 , and the photoelectric switch 606 is electrically connected to the electric push rod 5 and the air pump 603 .

[0026] The effect achieved by the entire embodiment 2 is that after the oil seal is put on the outer side of the sealing shaft 604, the oil seal will block the infrared signal of the bottom photoelectric switch 606. When the signal of the photoelectric switch 606 is blocked, it means that the workpiece is placed in place, and the electric push rod 5 can be controlled to run for detection, thereby achieving the purpose of improving the degree of automation of the device and improving work efficiency.

[0027] Working principle: when testing the air tightness of the oil seal, the oil seal is sleeved on the outer side of the sealing shaft 604, supported by the retaining ring 605 at the bottom, the oil seal is installed, and then the electric push rod 5 is started to extend. The extension of the electric push rod 5 can drive the sealing box 701 to move down to a state of docking and fitting with the bottom box 601, and a closed space is formed between the sealing box 701 and the bottom box 601. When the sealing box 701 moves down, the pressure ring 703 is driven to press on the surface of the oil seal. As the sealing box 701 continues to move downward, the compression spring 702 contracts, and the resilience of the spring 702 is used to make the pressure ring 703 firmly limit the position of the oil seal, and then the air pump 603 is started. After the air pump 603 is started, air is blown into the bottom box 601 through the connection of the air pipe 602. If the sealing performance of the oil seal is poor, the air flow will pass through the oil seal and flow into the sealing box 701, and through the leakage The use of the leakage detection sensor 705 can determine whether the oil seal is leaking. After the leakage detection is completed, the vacuum pump 706 is started to evacuate air into the sealing box 701 through the connection of the vacuum pipe 707. After the vacuum in the sealing box 701 generates negative pressure, the rubber ring 704 and the oil seal can be fitted together to adsorb and fix the oil seal. When the electric push rod 5 shrinks and resets, the adsorbed and fixed oil seal can be brought out of the bottom box 601, avoiding the problem that the oil seal is difficult to remove after the detection is completed, thereby improving the convenience of the device's material removal operation. After the oil seal is sleeved on the outer position of the sealing shaft 604, the oil seal will block the infrared signal of the bottom photoelectric switch 606. When the signal of the photoelectric switch 606 is blocked, it means that the workpiece is in place, and the electric push rod 5 can be controlled to run for detection, thereby achieving the purpose of improving the degree of automation of the device and improving work efficiency.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An engine crankshaft oil seal airtightness detection device, characterized in that: include: A base frame (1), wherein a bottom plate (2) is fixedly connected to the top of the base frame (1), columns (3) are fixedly connected to the top corners of the bottom plate (2), a top plate (4) is fixedly connected between the upper end surfaces of a plurality of the columns (3), and an electric push rod (5) is fixedly connected to the bottom of the top plate (4); A placement component (6), the placement component (6) is fixedly connected to the top of the bottom plate (2), the placement component (6) comprises a bottom box (601) and an air pump (603), an output end of the air pump (603) is fixedly connected to an air pipe (602), and the air pipe (602) is fixedly connected to the bottom box (601); A detection component (7), the detection component (7) is fixedly connected to the lower end surface of the electric push rod (5), the detection component (7) comprises a sealing box (701), a plurality of springs (702) are evenly fixedly connected to the top of the sealing box (701), a pressure ring (703) is fixedly connected between the lower end surfaces of the plurality of springs (702), a plurality of through holes are evenly opened at the bottom of the pressure ring (703), and a rubber ring (704) is arranged near the through hole at the bottom of the pressure ring (703).

2. The engine crankshaft oil seal airtightness detection device according to claim 1, characterized in that: A sealing shaft (604) is fixedly connected to the bottom of the bottom box (601), and a retaining ring (605) is fixedly connected to the inner surface of the bottom box (601).

3. The engine crankshaft oil seal airtightness detection device according to claim 1, characterized in that: A photoelectric switch (606) is fixedly connected to the bottom of the bottom box (601), and the photoelectric switch (606) is electrically connected to the electric push rod (5) and the air pump (603).

4. The engine crankshaft oil seal airtightness detection device according to claim 1, characterized in that: The pressure ring (703) matches the position of the sealing shaft (604), and the pressure ring (703) is located at the lower side of the sealing box (701).

5. The engine crankshaft oil seal airtightness detection device according to claim 1, characterized in that: A leakage detection sensor (705) is fixedly connected to the top of the sealing box (701), and the sealing box (701) and the bottom box (601) are arranged in a matching manner.

6. The engine crankshaft oil seal airtightness detection device according to claim 1, characterized in that: The top of the sealing box (701) is fixedly connected to an air pump (706), and the output end of the air pump (706) is fixedly connected to an air extraction pipe (707).

7. The engine crankshaft oil seal airtightness detection device according to claim 6, characterized in that: The air extraction pump (706) is fixedly connected to the sealing box (701), and the air extraction pump (706) and the sealing box (701) are connected.

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