Rocker arm lubrication pressure measuring device and method of operation thereof

Abstract

The present application belongs to the technical field of rocker arm detection, and discloses a rocker arm lubrication pressure measuring device and a working method thereof. The device comprises an oil feeder, a pressure sensor and a fixing assembly. The fixing assembly comprises a base and a clamp. The clamp is installed on the base and is crimped on the rocker arm. A hydraulic tappet is arranged on the base and abuts against one side of an oil injection port of the rocker arm. A fixing column is further arranged on the side of the base away from the oil injection port and abuts against the lower side of the rocker arm. An oil pipe is arranged in the hydraulic tappet. The oil pipe communicates the oil injection port and the oil feeder. The pressure sensor is arranged in the oil pipe and can detect the oil pressure in the oil pipe. The device solves the problem that the rocker arm needs to be installed in the engine for lubrication pressure detection, resulting in complicated disassembly and assembly steps and low detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of rocker arm testing technology, and in particular to a rocker arm lubrication pressure measuring device and its working method. Background Technology

[0002] In the modern automotive industry, most engines use roller rocker arms, which are an indispensable part of the car engine. The roller in the middle of the rocker arm abuts against the upper cam, pushing one end of the rocker arm to move the valve up and down. At the same time, a hydraulic tappet is set on the lower side of the other end of the rocker arm. The hydraulic tappet sprays lubricating oil through the oil injection hole on the rocker arm. The lubricating oil can be sprayed onto the roller through the oil injection hole to achieve the lubrication effect.

[0003] During operation, the rocker arm rotates slightly around the hydraulic tappet. Hydraulic oil continuously sprays lubricating oil onto the rollers through the injection holes. The pressure of the sprayed lubricating oil is called the lubrication pressure. Due to machining errors and other reasons, the angle between the oil passages of the injection holes and the oil passages of the hydraulic tappets changes when the engine is running, thus altering the flow direction of the lubricating oil. This can result in lower lubrication pressure within the lubricating oil, leading to insufficient or uneven application of lubricating oil to the rollers. This can cause abnormal wear between the rollers and the cam, ultimately damaging the engine. However, current technology lacks a convenient screening method for rocker arms that meet the required lubrication pressure. The only option is to place the rocker arm inside the engine and operate it for a period of time to observe the wear of the rollers and cams. This process of disassembling and reassembling the engine to insert and remove the rocker arm is complex and reduces testing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a rocker arm lubrication pressure measuring device and its working method, which solves the problem that the existing technology requires the rocker arm to be installed in the engine to detect the lubrication pressure, resulting in a cumbersome disassembly and assembly process and low detection efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a rocker arm lubrication pressure measuring device, including an oil supply unit, a pressure sensor, and a fixing assembly. The fixing assembly includes a base and a clamp. The clamp is mounted on the base and presses against the rocker arm. A hydraulic tappet is provided on the base, and the hydraulic tappet abuts against the oil injection port side of the rocker arm. A fixing column is also provided on the side of the base away from the oil injection port, and the fixing column abuts against the lower side of the rocker arm. An oil pipe is provided inside the hydraulic tappet, and the oil pipe connects the oil injection port and the oil supply unit. Lubricating oil from the oil supply unit is sprayed out of the oil injection port. The pressure sensor is provided inside the oil pipe, and the pressure sensor can detect the oil pressure inside the oil pipe. The pressure sensor is electrically connected to a display, and the display can display the pressure value inside the oil pipe.

[0006] Preferably, the clamp is U-shaped, with openings on both sides, and the rocker arm is disposed in the opening. A first through hole is formed on the clamp, and a first screw hole is provided on the base. A first bolt passes through the first through hole and is screwed into the first screw hole.

[0007] Preferably, the first bolt is provided in four groups, with the first screw hole, the first through hole and the first bolt corresponding one to one, and the first bolt distributed around the upper surface of the fixture.

[0008] Preferably, the clamp is provided with a second screw hole, and a fastening bolt is screwed into the second screw hole, with the bottom of the fastening bolt abutting against the rocker arm.

[0009] Preferably, the base has a third screw hole, the outer wall of the fixing post has a thread, and the fixing post is screwed into the third screw hole.

[0010] Preferably, the hydraulic tappet can move vertically up and down perpendicular to the base.

[0011] Preferably, the fixing component is placed in the recovery tray, the bottom of the recovery tray is connected to the pressure sensor through the recovery pipe, and the lubricating oil flows back to the oil supply device along the recovery pipe.

[0012] A method for operating a rocker arm lubrication pressure measuring device, comprising the aforementioned rocker arm lubrication pressure measuring device, and further comprising the following steps:

[0013] S1, unscrew the first bolt and remove the clamp from the base;

[0014] S2, rotate the fixed column, adjust the height of the fixed column, and place both ends of the rocker arm on the fixed column and the hydraulic tappet respectively;

[0015] S3, fix the clamp to the base with the first bolt;

[0016] S4, rotate the fastening bolt to press the fastening bolt onto the rocker arm;

[0017] S5, turn on the oil supply device and record the oil pressure in the oil pipe through the pressure sensor.

[0018] Beneficial effects: By placing the rocker arm on the rocker arm lubrication pressure measuring device and fixing it with a base, clamp, and fixing column, the rocker arm can simulate the working state inside the engine. This saves the step of installing the rocker arm into the engine for testing, reduces the complexity of the test, and allows the pressure sensor to directly see the magnitude of the lubrication pressure at the oil pipe connected to the fuel injector. This enables the testers to intuitively judge whether the rocker arm is qualified in the working scenario, make quick judgments and screenings, and improve testing efficiency. Attached Figure Description

[0019] Figure 1 This is a front view of the rocker arm lubrication pressure measuring device of the present invention;

[0020] Figure 2 This is a side view of the rocker arm lubrication pressure measuring device of the present invention.

[0021] In the diagram: 1-oil supply device; 11-oil pipe; 2-pressure sensor; 3-base; 4-clamp; 41-opening; 5-hydraulic tappet; 6-rocker arm; 7-first bolt; 8-fastening bolt; 9-fixing column. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0026] Under current technology, since there is no convenient means to test the rocker arm lubrication pressure, the rocker arm can only be installed inside the engine and identified after working for a period of time. This makes disassembling and assembling the engine quite complicated, resulting in low testing efficiency for the rocker arm.

[0027] To solve the above problems, such as Figures 1 to 2 As shown, the present invention provides a rocker arm lubrication pressure measuring device, including an oil supply unit 1, a pressure sensor 2, and a fixing assembly. The fixing assembly includes a base 3 and a clamp 4. The clamp 4 is mounted on the base 3 and pressed against the rocker arm 6. A hydraulic tappet 5 is provided on the base 3, and the hydraulic tappet 5 abuts against the oil injection port side of the rocker arm 6. A fixing post 9 is also provided on the side of the base 3 away from the oil injection port, and the fixing post 9 abuts against the lower side of the rocker arm 6. An oil pipe 11 is provided inside the hydraulic tappet 5, and the oil pipe 11 connects the oil injection port and the oil supply unit 1. Lubricating oil from the oil supply unit 1 is sprayed out of the oil injection port. A pressure sensor 2 is provided inside the oil pipe 11, and the pressure sensor 2 can detect the oil pressure inside the oil pipe 11. The pressure sensor 2 is electrically connected to a display, and the display can display the pressure value inside the oil pipe 11.

[0028] Before testing, simply remove the clamp 4 from the base 3, adjust the height of the fixing column 9, and then place the rocker arm 6 directly. The hydraulic tappet 5 on the base 3 has the same structural principle as the hydraulic tappet 5 inside the engine. While allowing for slight up-and-down movement, it supplies oil to the fuel injector through the internal oil pipe 11. After fixing the rocker arm 6 to the base 3 using the clamp 4, the working angle of the rocker arm 6 inside the engine and the hydraulic tappet 5 can be determined. By restoring the working angle of the rocker arm 6 inside the engine, the lubrication pressure inside the fuel injector on the rocker arm 6 can be measured to see if it meets the specified value. The display value allows for a direct assessment of whether the rocker arm 6 being tested meets the standard. Installing the clamp 4 is simpler than installing the rocker arm 6 inside the engine, saving testing time and improving efficiency. The pressure sensor 2 displays the lubrication pressure value inside the oil pipe 11, which is existing technology and will not be elaborated upon here.

[0029] The clamp 4 is U-shaped, with openings 41 on both sides. A rocker arm 6 is installed in the opening 41. A first through hole is formed on the clamp 4, and a first screw hole is provided on the base 3. A first bolt 7 passes through the first through hole and is screwed into the first screw hole.

[0030] The clamp 4 is fixed to the base 3 by screwing the first bolt 7, which makes it easy for the staff to install and disassemble. The installation time is shorter than the time to install the rocker arm 6 in the engine, which can shorten the time to test the lubrication pressure of the rocker arm 6.

[0031] The first bolt 7 is provided in four sets, and the first screw hole and the first through hole correspond one-to-one with the first bolt 7. The first bolt 7 is distributed around the upper surface of the fixture 4.

[0032] By setting four sets of first bolts 7, the rocker arm 6 can be fixed more stably, restoring the rocker arm 6 to its working position inside the engine and preventing the rocker arm 6 from shaking.

[0033] The fixture 4 is provided with a second screw hole, and a fastening bolt 8 is screwed into the second screw hole. The bottom of the fastening bolt 8 abuts against the rocker arm 6. Through the abutment between the fastening bolt 8 and the upper and lower sides of the fixing post 9, the rocker arm 6 can be stably fixed on the fixture 4, and there will be no shaking during the test.

[0034] A third screw hole is formed on the base 3, and threads are formed on the outer wall of the fixing post 9. The fixing post 9 is screwed into the third screw hole. The fixing post 9 can rotate within the third screw hole. When the height of the fixing post 9 is adjusted, the angle between the rocker arm 6 and the hydraulic tappet 5 will change. This allows adjustment of the installation angle of the rocker arm 6 on the base 3, which can simulate the lubrication pressure at various positions when the rocker arm 6 is working in the engine. The lubrication pressure at each angle between the rocker arm 6 and the hydraulic tappet 5 can be measured by the pressure sensor 2. Thus, the lubrication pressure at all working angles of the rocker arm 6 can be measured by the rocker arm lubrication pressure measuring device.

[0035] The oil sprayed from the nozzle will be sprayed directly onto the roller on the rocker arm 6, and then the oil will flow downward into the recovery tray. The bottom of the recovery tray is connected to the pressure sensor 2 through the recovery pipe. The lubricating oil flows back into the oil supply device 1 along the recovery pipe, so that the oil can be reused. The oil supply device 1 has both recovery and spraying functions. The oil supply device 1 is existing technology and will not be described in detail again.

[0036] A method for operating a rocker arm lubrication pressure measuring device, comprising the rocker arm lubrication pressure measuring device and the following steps:

[0037] S1, unscrew the first bolt 7 and remove the clamp 4 from the base 3;

[0038] S2, rotate the fixed column 9, adjust the height of the fixed column 9, and place the two ends of the rocker arm 6 on the fixed column 9 and the hydraulic tappet 5 respectively;

[0039] S3, fix the clamp 4 to the base 3 with the first bolt 7;

[0040] S4, rotate the fastening bolt 8 to press the fastening bolt 8 onto the rocker arm 6;

[0041] S5, turn on the oil supply device 1, and record the oil pressure in the oil pipe 11 through the pressure sensor 2.

[0042] Afterwards, the clamp 4 can be removed from the base 3, the height of the fixing column 9 can be readjusted, and the clamp 4 can be placed on the rocker arm 6 again for measurement. This allows for the measurement of the lubrication pressure at different angles between the rocker arm 6 and the hydraulic tappet 5, making the process of testing the rocker arm 6 more convenient and the test results more comprehensive.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A rocker arm lubrication pressure measuring device, characterized in that, The device includes an oil supply unit (1), a pressure sensor (2), and a fixing assembly. The fixing assembly includes a base (3) and a clamp (4). The clamp (4) is mounted on the base (3) and presses against the rocker arm (6). A hydraulic tappet (5) is provided on the base (3) and abuts against the oil injection port side of the rocker arm (6). A fixing post (9) is also provided on the side of the base (3) away from the oil injection port and abuts against the... On the lower side of the rocker arm (6), an oil pipe (11) is provided inside the hydraulic tappet (5). The oil pipe (11) connects the oil injector and the oil supply device (1). Lubricating oil from the oil supply device (1) is sprayed out from the oil injector. The pressure sensor (2) is provided inside the oil pipe (11). The pressure sensor (2) can detect the oil pressure inside the oil pipe (11). The pressure sensor (2) is electrically connected to the display. The display can display the pressure value inside the oil pipe (11).

2. The rocker arm lubrication pressure measuring device according to claim 1, characterized in that, The clamp (4) is U-shaped, with openings (41) on both sides. The rocker arm (6) is provided in the opening (41). A first through hole is formed on the clamp (4), and a first screw hole is provided on the base (3). A first bolt (7) passes through the first through hole and is screwed into the first screw hole.

3. The rocker arm lubrication pressure measuring device according to claim 2, characterized in that, The first bolt (7) is provided in four sets, and the first screw hole, the first through hole and the first bolt (7) correspond one to one. The first bolt (7) is distributed around the upper surface of the clamp (4).

4. The rocker arm lubrication pressure measuring device according to claim 3, characterized in that, The clamp (4) is provided with a second screw hole, and a fastening bolt (8) is screwed into the second screw hole. The bottom of the fastening bolt (8) abuts against the rocker arm (6).

5. The rocker arm lubrication pressure measuring device according to claim 4, characterized in that, A third screw hole is formed on the base (3), and a thread is formed on the outer wall of the fixing post (9). The fixing post (9) is screwed into the third screw hole.

6. The rocker arm lubrication pressure measuring device according to claim 5, characterized in that, The hydraulic tappet (5) can move up and down perpendicularly to the base (3).

7. The rocker arm lubrication pressure measuring device according to claim 1, characterized in that, The fixing component is placed in the recovery tray, and the bottom of the recovery tray is connected to the oil supply device (1) through the recovery pipe. The lubricating oil flows back to the oil supply device (1) along the recovery pipe.

8. A method for operating a rocker arm lubrication pressure measuring device, characterized in that, The rocker arm lubrication pressure measuring device according to claim 6 further includes the following steps: S1, unscrew the first bolt (7) and remove the clamp (4) from the base (3); S2, rotate the fixed column (9) and adjust the height of the fixed column (9), and place the two ends of the rocker arm (6) on the fixed column (9) and the hydraulic tappet (5) respectively; S3, fix the clamp (4) to the base (3) with the first bolt (7); S4, rotate the fastening bolt (8) to press the fastening bolt (8) onto the rocker arm (6); S5, turn on the oil supply device (1) and record the oil pressure in the oil pipe (11) through the pressure sensor (2).

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