Tool holder for easy removal of an oil pump

Abstract

The utility model relates to the oil pump tool seat field discloses an easily take out oil pump's tool seat, including oil pump and install oil pump's tool seat, oil pump and tool seat surface meet, the tool seat passes through air passage and connects controlled airflow, controlled airflow can spout from tool seat surface, and oil pump then separates from tool seat surface, and suspends in the upper. The utility model connects controlled airflow in the tool seat, so that oil pump then separates from tool seat surface, and suspends in its upper, has the whole oil pump that can be taken down quickly after simulation check, and need not reassemble, improves simulation check efficiency greatly, convenient operation, simple structure, strong practicality, wide application scope, can avoid the beneficial effect that oil pump produces knock in the process of taking out and improves oil pump product cleanliness to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the field of oil pump fixtures, and in particular to a fixture for easy removal of an oil pump. Background Technology

[0002] In the manufacturing and assembly of motorcycle engines, the oil pump is a critical core component, and its performance and reliability directly affect the overall operating quality and lifespan of the machine. To ensure that the delivered oil pump assembly can meet the user's on-site assembly requirements, manufacturers typically need to conduct functional checks and compatibility verifications on the oil pump's tooling fixture to simulate the final assembly scenario before shipment.

[0003] For example, the tooling for simulating the inspection of oil pump flexibility, as described in Chinese Utility Model Patent No. CN216098454U, includes a clamping mechanism and a tooling base. The clamping mechanism clamps the oil pump onto the tooling base. The tooling base is adapted to the bottom surface of the oil pump. The clamping position of the clamping mechanism is the mounting hole on the oil pump that connects to the engine housing. This effectively solves the problem of simulating the inspection of oil pump flexibility in current oil pump production processes.

[0004] For example, a Chinese utility model patent number CN216098454U describes an oil pump simulation assembly flexibility testing device. The lower base plate is fixedly connected to the corner of the vertical shaft, and the upper base plate is fixed to the vertical shaft by bolts. A blind groove is opened on the upper base plate, and a sliding base plate is inserted from the open end of the blind groove. A working hole is opened at the bottom of the groove at the closed end of the blind groove. A stationary pressure block extends along the groove and is located above the working hole. The cylinder is installed on the lower base plate, and the floating fixed block at the upper end of the spherical push rod is adapted to the working hole. It is suitable for simulating the flexibility testing of oil pumps of different models and structures and has strong versatility.

[0005] However, regardless of the type of simulation testing fixture used, during simulation inspection, some oil pumps are not mechanically fixed. The individual components are only in an assembled state. Since the oil pump needs to be tightly attached to the fixture surface during simulation inspection, it is difficult to remove the entire oil pump at once. During the removal process, the components are also prone to falling apart, posing a risk of component loss. It is necessary to remove each component one by one and then reassemble them. However, this method not only introduces repetitive labor, resulting in low production efficiency and extending the overall operation cycle, but also easily causes bumps and scratches during multiple disassembly and assembly operations, which can affect the cleanliness of the product and may affect the final performance of the oil pump. Utility Model Content

[0006] To overcome the problem in the aforementioned background technology that the oil pump is difficult to remove from the fixture in one go after the simulation inspection is completed, this utility model provides a fixture for easy removal of the oil pump. By introducing a controlled airflow into the fixture, the oil pump is detached from the surface of the fixture and suspended above it. This allows for the quick removal of the entire oil pump after the simulation inspection without the need for reassembly, significantly improving the efficiency of the simulation inspection. It is convenient to operate, has a simple structure, is highly practical, and has a wide range of applications. It also minimizes the risk of damage to the oil pump during removal and improves the cleanliness of the oil pump product.

[0007] The technical solution of this utility model is as follows: A fixture for easy removal of an oil pump includes an oil pump and a fixture for mounting the oil pump. The oil pump is in contact with the surface of the fixture. The fixture is connected to a controlled airflow through an air passage. The controlled airflow can be ejected from the surface of the fixture, and the oil pump is detached from the surface of the fixture and suspended above it.

[0008] Compared with existing technologies, the beneficial effects of this technical solution are as follows: An airflow with appropriate flow rate and pressure can be introduced according to the mass of the oil pump, creating a specific pressure distribution on the bottom surface of the pump. This generates a net lift force sufficient to balance the pump's weight and suspend it vertically upwards, causing the pump to detach from the fixture surface and float above. This structure only requires modification to the fixture on which the oil pump is mounted and is suitable for various oil pump simulation testing fixtures. Thus, by introducing controlled airflow into the fixture, the oil pump is suspended above it, allowing for easy and complete removal without scattering. This method offers advantages such as convenient operation, improved simulation inspection efficiency, simple structure, wide applicability, and minimized risk of damage during removal, while also improving the cleanliness of the oil pump.

[0009] Preferably, the tooling base is provided with a ventilation cavity communicating with the air passage, and its surface is provided with a plurality of ventilation holes communicating with the ventilation cavity.

[0010] Its beneficial effect is that the controlled airflow flows through the air passage and into the ventilation cavity, and finally sprays out from the vent, causing the oil pump to float above.

[0011] In a further preferred embodiment, the center of the tooling base is recessed downward to form a placement groove, and the vent holes are evenly distributed on the inner bottom surface of the placement groove.

[0012] Its beneficial effects are as follows: the vent holes are evenly opened on the inner bottom surface of the placement slot, which will not affect the normal rotation of the inner rotor. The controlled airflow ejected from the vent holes at this position can make the oil pump suspend without dispersing the oil pump components.

[0013] In a further preferred embodiment, the inner rotor of the oil pump is embedded in the placement groove, and the surface of the tooling seat outside the placement groove is also provided with a positioning pin, and the outer rotor of the oil pump is sleeved on the positioning pin for positioning.

[0014] Its beneficial effects are: the inner rotor is placed in the placement slot and can rotate in the placement slot; the positioning pin is used to simulate the state of restricting the rotation of the outer rotor.

[0015] More preferably, the air passage is a ventilation pipe, which is connected to the tooling seat via a pipe joint. The top end of the pipe joint extends into the bottom of the tooling seat and is threaded thereon, while the bottom end is fitted onto the top of the ventilation pipe and is threaded thereon.

[0016] Its beneficial effect is that the pipe fitting is used to connect the ventilation pipe and the tooling seat, and maintain the gas tightness at the connection between the two.

[0017] More preferably, the ventilation cavity is vertically divided into multiple channels.

[0018] Its beneficial effects are: it can increase the pressure in the ventilation cavity and the uniformity of the controlled airflow distribution, making it easier for the oil pump to float stably.

[0019] More preferably, the upper inner diameter of the airway is smaller than the lower inner diameter.

[0020] Its beneficial effects are that it allows airflow to enter the ventilation cavity more quickly, and allows the oil pump to be in a stable floating state more quickly.

[0021] Preferably, an air inlet is provided on the side of the bottom of the air passage, and the air inlet is connected to an inflation pipe, which is connected to an external air source.

[0022] Its beneficial effect is that the air source injects airflow into the airway through the air filling pipe.

[0023] In a further preferred embodiment, the bottom of the air passage is also provided with a throttle valve, the control end of which extends upward to control the size of the orifice through which the gas from the air inlet flows.

[0024] Its beneficial effect is that by controlling the extension stroke of the valve core, the size of the orifice through which the gas flows through the inlet can be controlled, thereby controlling the flow rate and pressure of the airflow.

[0025] In a further preferred embodiment, a flow-limiting plate is fixedly installed inside the air passage, and the flow-limiting plate has several through holes; the installation position of the flow-limiting plate is above the air inlet.

[0026] Its beneficial effect is that this structure can further limit the amount of airflow entering the tooling seat per unit time, so that the airflow between the flow restrictor and the surface of the tooling seat can gradually increase, avoiding excessive airflow entering the tooling seat in a short time after the throttle valve is opened, which would cause excessive net lift to the oil pump and knock the oil pump off. Attached Figure Description

[0027] This utility model will be described with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the current limiting plate of this utility model.

[0028] Reference numerals: oil pump 1, inner rotor 11, outer rotor 12, tooling seat 2, ventilation cavity 21, ventilation hole 22, placement slot 23, positioning pin 24, air passage 3, pipe joint 31, air inlet 32, air charging pipe 33, flow restrictor 34, through hole 35, throttle valve 4, valve core 41. Detailed Implementation To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and 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.

[0029] Example 1: As Figures 1 to 2 The illustrated fixture for easy removal of an oil pump includes an oil pump 1 and a fixture 2 for mounting the oil pump 1. The oil pump 1 includes an inner rotor 11 and an outer rotor 12, with an overall weight generally between 40-300g. The outer rotor 12 is fitted around the inner rotor 11 from below, without being fixedly connected. The oil pump 1 is in contact with the surface of the fixture 2, meaning the bottom surfaces of the inner rotor 11 and the outer rotor 12 of the oil pump 1 are in close contact with the surface of the fixture 2. Other devices for simulating inspection of the oil pump 1 are existing technologies and will not be described in detail here.

[0030] The fixture base 2 is connected to an air passage 3, which can be connected to a controlled airflow. The controlled airflow enters the fixture base 2 through the air passage 3 and exits from the surface of the fixture base 2. This allows for the introduction of an airflow with a corresponding flow rate and pressure based on the mass of the oil pump 1, creating a specific pressure distribution on the bottom surface of the oil pump 1. This generates a net lift force sufficient to balance the weight of the oil pump 1 and suspend it vertically upwards, causing the oil pump 1 to detach from the surface of the fixture base 2 and float above it. This structure only requires modification to the fixture base 2 on which the oil pump 1 is mounted and is suitable for various oil pump 1 simulation testing fixtures.

[0031] After the oil pump 1 installed on the fixture 2 completes the simulation test, a controlled airflow is introduced into the fixture 2. At this time, the oil pump 1 detaches from the surface of the fixture 2 and floats above. Since the oil pump 1 has detached from the fixture 2 and has a certain distance from the surface of the fixture assembly, it is no longer in contact with the surface of the fixture 2. At this time, the outer rotor 12 can be pinched from below and the entire oil pump 1 can be removed at once. When the outer rotor 12 is lifted, the center of the top surface of the outer rotor 12 will be engaged with the center of the inner rotor 11. Therefore, the outer rotor 12 and the inner rotor 11 will not separate. However, if the inner rotor 11 is lifted directly, the outer rotor 12 will directly leave the inner rotor 11, and the oil pump 1 cannot be removed as a whole. Therefore, by introducing controlled airflow into the tooling seat 2, the oil pump 1 is suspended above the tooling seat 2, and the oil pump 1 can be easily removed as a whole without scattering. This has the advantages of convenient operation, improved simulation inspection efficiency, simple structure, wide applicability, and minimizing the risk of bumps and scratches to the oil pump 1 during removal, as well as improving the cleanliness of the oil pump 1.

[0032] Example 2: Based on Example 1, the tooling base 2 is optimized. The tooling base 2 is provided with a ventilation cavity 21. The top end of the air passage 3 is fixedly connected to the bottom surface of the tooling base 2 and communicates with the ventilation cavity 21. The surface of the tooling base 2 is provided with a number of ventilation holes 22 that communicate with the ventilation cavity 21. The controlled airflow flows through the air passage 3 and into the ventilation cavity 21, and finally sprays out from the ventilation holes 22, so that the oil pump 1 is suspended above.

[0033] Preferably, the center of the tooling base 2 is recessed downward to form a placement groove 23, the inner rotor 11 is embedded in the placement groove 23 and rotates in the placement groove 23, and the surface of the tooling base 2 outside the placement groove 23 is also provided with a positioning pin 24, the outer rotor 12 of the oil pump 1 is sleeved on the positioning pin 24 for positioning, and the positioning pin 24 is used to simulate the state of restricting the rotation of the outer rotor 12.

[0034] Vent holes 22 are evenly distributed on the inner bottom surface of the placement groove 23, which will not affect the normal rotation of the inner rotor 11. The controlled airflow ejected from the vent holes 22 at this position can suspend the oil pump 1 without dispersing the components of the oil pump 1.

[0035] In a further preferred embodiment, the air passage 3 is a ventilation pipe, which is connected to the fixture 2 via a pipe connector 31. The top end of the pipe connector 31 extends into the bottom of the fixture 2 and is threaded thereon, while the bottom end is fitted onto the top of the ventilation pipe and is threaded thereon. The pipe connector 31 is used to connect the ventilation pipe and the fixture 2 and to maintain the gas tightness at the connection between the two.

[0036] In a further preferred embodiment, the ventilation cavity 21 of the tooling base 2 is vertically divided into multiple airflow channels, which can improve the pressure in the ventilation cavity 21 and the uniformity of the controlled airflow distribution, making it easier for the oil pump 1 to float stably. In addition, the upper inner diameter of the air passage 3 is smaller than the lower inner diameter, which allows the airflow to enter the ventilation cavity 21 more quickly, and the oil pump 1 can be in a stable floating state more quickly.

[0037] Example 3: Based on Example 1, the air passage 3 is optimized. An air inlet 32 ​​is provided on the side of the bottom of the air passage 3. The air inlet 32 ​​is connected to an inflation pipe 33. An air source is connected to the inflation pipe 33. The air source injects airflow into the air passage 3 through the inflation pipe 33.

[0038] A throttle valve 4 is also provided on the bottom surface of the air passage 3. The throttle valve 4 controls the gas flow rate and pressure, thereby ultimately controlling the levitation force. The valve core 41 can be moved by rotating the handwheel or valve stem, thereby changing the size of the orifice or gap through which the gas flows. In this embodiment, the throttle valve 4 is installed at the bottom of the air passage 3, and its valve core 41 extends vertically upward from the bottom surface of the air passage 3 and is connected parallel to the opening of the air inlet. By rotating the handwheel or valve stem, the extension stroke of the valve core 41 can be controlled, thereby controlling the size of the orifice through which the gas flows through the air inlet, and realizing the control of the airflow rate and pressure.

[0039] After the oil pump 1 installed on the fixture 2 completes the simulation test, the throttle valve 4 can be slowly opened to allow the controlled airflow to gradually enter the fixture 2. At this time, the net lift generated by the controlled airflow on the bottom surface of the oil pump 1 must be greater than the weight of the oil pump 1 itself. When the inner rotor 11 of the oil pump 1 is completely removed from the placement slot 23, the outer rotor 12 will have enough distance from the surface of the fixture 2 to facilitate the removal of the oil pump 1. After removing the oil pump 1, the throttle valve 4 will be closed to complete the simulation test of the oil pump 1.

[0040] Preferably, a flow restrictor 34 is also fixedly installed inside the air passage 3, and several through holes 35 are opened on the surface of the flow restrictor 34; the installation position of the flow restrictor 34 is above the air inlet. The airflow entering the air passage 3 from the air inlet must pass through the through holes 35 before entering the fixture 2. This structure can further limit the amount of airflow entering the fixture 2 per unit time, so that the airflow between the flow restrictor 34 and the surface of the fixture 2 can gradually increase, avoiding excessive airflow entering the fixture 2 in a short time after the throttle valve 4 is opened, which would cause excessive net lift to the oil pump 1 and knock the oil pump 1 off.

[0041] The above embodiments merely illustrate specific implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the technical solution of this application, and these all fall within the scope of protection of this application.

Claims

1. A fixture for easy removal of an oil pump, comprising an oil pump (1) and a fixture (2) for mounting the oil pump (1), wherein the oil pump (1) is in contact with the surface of the fixture (2), characterized in that: The tooling seat (2) is connected to the controlled airflow through the air passage (3). The controlled airflow can be sprayed out from the surface of the tooling seat (2), while the oil pump (1) is detached from the surface of the tooling seat (2) and suspended above it.

2. The tooling base for easy removal of the oil pump according to claim 1, characterized in that: The tooling base (2) is provided with a ventilation cavity (21) communicating with the air passage (3), and its surface is provided with a number of ventilation holes (22) communicating with the ventilation cavity (21).

3. The tooling base for easy removal of the oil pump according to claim 2, characterized in that: The tooling base (2) has a recessed center on its surface to form a placement groove (23), and the ventilation holes (22) are evenly distributed on the inner bottom surface of the placement groove (23).

4. The tooling base for easy removal of the oil pump according to claim 3, characterized in that: The inner rotor (11) of the oil pump (1) is embedded in the placement groove (23), and the surface of the tooling seat (2) outside the placement groove (23) is also provided with a positioning pin (24). The outer rotor (12) of the oil pump (1) is sleeved on the positioning pin (24) for positioning.

5. A tooling base for easy removal of an oil pump according to claim 4, characterized in that: The air passage (3) is a ventilation pipe. The ventilation pipe is connected to the tooling seat (2) through a pipe joint (31). The top end of the pipe joint (31) extends into the bottom of the tooling seat (2) and is threaded thereon, while the bottom end is sleeved on the top of the ventilation pipe and is threaded thereon.

6. A tooling base for easy removal of an oil pump according to claim 2 or claim 5, characterized in that: The ventilation cavity (21) is vertically divided into multiple channels.

7. A tooling base for easy removal of an oil pump according to claim 6, characterized in that: The upper inner diameter of the airway (3) is smaller than the lower inner diameter.

8. A tooling base for easy removal of an oil pump according to claim 1, characterized in that: An air inlet (32) is provided on the side of the bottom of the air passage (3), and the air inlet (32) is connected to an inflation pipe (33), which is connected to an external air source.

9. A tooling base for easy removal of an oil pump according to claim 8, characterized in that: The bottom of the air passage (3) is also provided with a throttle valve (4), the control end of the throttle valve (4) extends upward to control the size of the orifice through which the gas from the air inlet flows.

10. A tooling base for easy removal of an oil pump according to claim 9, characterized in that: A flow limiting plate (34) is also fixed inside the air passage (3), and the flow limiting plate (34) has several through holes (35); the flow limiting plate (34) is installed above the air inlet.

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