Combustion engine oil pump

Abstract

The utility model relates to the technical field of oil pumps, in particular to a combustion engine oil pump which comprises a pump body, a driving gear, a driven gear, an oil inlet cavity and an oil outlet cavity are arranged in the pump body, the oil outlet cavity is connected with a first oil return channel, and the first oil return channel is connected with a pressure regulating mechanism. The pressure regulating mechanism comprises a left chamber, a right chamber and a connecting channel; the lower end of the right cavity is connected with a second oil return channel, the lower end of the left cavity is connected with a limiting channel, and the lower ends of the second oil return channel and the limiting channel are both communicated with the oil inlet cavity. A one-way valve is arranged in the right cavity and comprises a first spring and a rubber block, the left end of the first spring is fixedly connected with the inner wall of the right cavity, and the right end of the first spring is fixedly connected with the rubber block; a blocking assembly is arranged in the left cavity. The problem that in the prior art, the oil supply amount of the oil outlet cavity of the combustion engine oil pump is excessive, the pressure value is too large, and pressure relief cannot be achieved is solved, and the stable oil pressure of the combustion engine oil pump is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to an oil pump for a combustion engine. Background Art

[0002] In the burner, the oil pump is the main actuator of the supply system, which is used to provide the fuel necessary for the combustion of the burner. When the burner is working, the controller controls the motor to rotate, and the motor drive shaft drives the oil pump driving shaft to rotate through the coupling. The oil pump driving shaft is linked with the drive shaft, so that the inner and outer gears serve as the master and driven gears respectively, and they mesh with each other to perform a cyclical oil suction and discharge action.

[0003] At present, Chinese patent publication number CN219827009U discloses a gear pair structure based on cylindrical spur gear involute meshing oil pump, including a casing, and an inner cavity is arranged inside the casing. By using the main involute gear and the slave involute gear as the gear pair structure of the oil pump, the defects of the existing gear cycloid meshing method can be solved. At the same time, the main involute gear and the slave involute gear are both tubular structures, and are respectively slidably arranged on the driving shaft and the driven shaft. When the main involute gear and the slave involute gear are damaged, the main involute gear and the slave involute gear are convenient to replace. By arranging a docking sleeve on the front end cover, after the docking sleeve is docked with the corresponding driving shaft and the driven shaft, in addition to assuming the fixing function, the docking method is simple, which is convenient for the installation and removal of the front end cover. A silicone sealing strip and a silicone cylinder are arranged between the front end cover and the front end of the casing, which improves the sealing effect between the front end cover and the casing, and at the same time, facilitates the disassembly and assembly of the front end cover.

[0004] However, although this device solves the defects of the existing gear cycloid meshing method, the burner gear oil pump is prone to excessive oil supply to the oil outlet chamber during actual use, resulting in excessive pressure and inability to release pressure. Utility Model Content

[0005] Therefore, in view of the above-mentioned problems, the utility model proposes a combustion engine oil pump to solve the problem that the combustion engine oil pump in the prior art may have excessive oil supply resulting in excessive pressure in the device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A combustion engine oil pump comprises a pump body, wherein a driving gear and a driven gear are arranged inside the pump body, and the driving gear and the driven gear are meshed with each other; an oil inlet chamber and an oil outlet chamber are respectively arranged on both sides of the meshing point of the driving gear and the driven gear, and the oil outlet chamber is connected to a first oil return channel, and a pressure regulating mechanism is connected to the end of the first oil return channel away from the oil outlet chamber.

[0008] The pressure regulating mechanism includes a left chamber, a right chamber and a connecting channel, the left and right ends of the connecting channel are respectively connected to the left chamber and the right chamber; the lower end of the first oil return channel is connected to the right end of the right chamber; the lower end of the right chamber is connected to the second oil return channel, the lower end of the left chamber is connected to the limiting channel, and the lower end of the second oil return channel and the lower end of the limiting channel are both connected to the oil inlet chamber.

[0009] A one-way valve is arranged in the right chamber; the one-way valve comprises a first spring and a rubber block, the left end of the first spring is fixedly connected to the inner wall of the right chamber, and the right end of the first spring is fixedly connected to the rubber block; a blocking assembly is arranged in the left chamber.

[0010] Furthermore, the blocking assembly includes a second spring, a first inclined block, and a second inclined block. The top end of the second spring is fixedly connected to the left chamber, the bottom end of the second spring is fixedly connected to the first inclined block, the bottom end of the first inclined block is fixedly connected to the baffle, and the baffle is slidably arranged in the limiting channel; the second inclined block is arranged on the right side of the first inclined block, and the inclined surface of the first inclined block and the inclined surface of the second inclined block are arranged opposite to each other.

[0011] Furthermore, a connecting rod is slidably arranged in the connecting channel, the left end of the connecting rod is fixedly connected to the second inclined block, and the right end of the connecting rod is fixedly connected to the rubber block.

[0012] Furthermore, the inclined surface of the first inclined block is arranged upward, and the inclined surface of the second inclined block is arranged downward.

[0013] Furthermore, the first oil return channel and the second oil return channel are staggered.

[0014] Furthermore, the driving gear is coaxially provided with a driving shaft, one end of the driving shaft passes through the outside of the pump body, and the driven gear is coaxially provided with a driven shaft.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are:

[0016] 1. By setting a one-way valve, the pressure of the oil outlet chamber can be adjusted. When the pressure in the oil outlet chamber is high, the excess oil in the oil outlet chamber can flow back to the oil inlet chamber through the one-way valve, achieving the effect of automatically buffering the pressure, making the output flow stable, and avoiding excessive oil from entering the combustion chamber, causing increased fuel consumption.

[0017] 2. By setting up the blocking component, the oil inlet volume of the oil inlet chamber can be adjusted. When the pressure value is too large, the second inclined block squeezes the first inclined block, so that the first inclined block drives the baffle to move downward, so that the lower end of the baffle enters the oil inlet chamber, partially blocking the oil inlet chamber, thereby reducing the oil inlet volume of the oil inlet chamber and further reducing the oil inlet pressure. This structure further ensures the stability of the pressure in the oil inlet chamber, effectively reduces the collision and friction between the components, and thus ensures the stable performance of the combustion engine oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 yes Figure 1 A magnified schematic diagram of center A. DETAILED DESCRIPTION

[0020] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0021] refer to Figure 1 and Figure 2 This embodiment provides a combustion engine oil pump, including a pump body 1, wherein a driving gear 21 and a driven gear 31 are arranged inside the pump body 1, wherein the driving gear 21 and the driven gear 31 are meshed with each other; the driving gear 21 is coaxially provided with a driving shaft 22, one end of which passes through the outside of the pump body 1, and the driven gear 31 is coaxially provided with a driven shaft 32; an oil inlet chamber 11 and an oil outlet chamber 12 are respectively arranged on both sides of the meshing point of the driving gear 21 and the driven gear 31; the oil outlet chamber 12 is connected to a first oil return channel 41, and a pressure regulating mechanism is connected to one end of the first oil return channel 41 away from the oil outlet chamber 12. When the combustion engine oil pump is used, the driving shaft 22 is driven to rotate by an external motor, and the driving gear 21 drives the driven gear 31 to rotate, forming a vacuum at the oil inlet chamber 11, thereby sucking in liquid and discharging the liquid at the oil outlet chamber 12, thereby realizing the oil delivery process.

[0022] The pressure regulating mechanism includes a left chamber 51, a right chamber 52 and a connecting channel 53, the left and right ends of the connecting channel 53 are connected to the left chamber 51 and the right chamber 52 respectively; the lower end of the first oil return channel 41 is connected to the right end of the right chamber 52; the lower end of the right chamber 52 is connected to the second oil return channel 42, and the first oil return channel 41 and the second oil return channel 42 are staggered; the lower end of the left chamber 51 is connected to the limiting channel 54; the lower end of the second oil return channel 42 and the lower end of the limiting channel 54 are both connected to the oil inlet chamber 11.

[0023] A one-way valve is arranged in the right chamber 52; the one-way valve comprises a first spring 61 and a rubber block 62, the left end of the first spring 61 is fixedly connected to the inner wall of the right chamber 52, and the right end of the first spring 61 is fixedly connected to the rubber block 62. The rubber block 62 can slide left and right in the right chamber 52. When the first spring 61 is in the original length state, the rubber block 62 covers the second oil return channel 42. If the pressure in the oil inlet chamber 11 is too high, the liquid enters the right part of the right chamber 52 through the first oil return channel 41, and the rubber block 62 moves to the left, and the liquid continues to enter the oil inlet chamber 11 through the second oil return channel 42.

[0024] The left chamber 51 is provided with a blocking assembly. The blocking assembly includes a second spring 71, a first inclined block 72, and a second inclined block 73. The top end of the second spring 71 is fixedly connected to the left chamber 51, the bottom end of the second spring 71 is fixedly connected to the first inclined block 72, the bottom end of the first inclined block 72 is fixedly connected to a baffle 74, and the baffle 74 is slidably arranged in the limiting channel 54; the second inclined block 73 is arranged on the right side of the first inclined block 72, and the inclined surface of the first inclined block 72 and the inclined surface of the second inclined block 73 are arranged oppositely. The inclined surface of the first inclined block 72 is arranged upward, and the inclined surface of the second inclined block 73 is arranged downward. When the second inclined block 73 moves to the left, it will squeeze the first inclined block 72 and generate a downward component force on the first inclined block 72, so that the first inclined block 72 moves downward, thereby driving the baffle 74 to move downward, thereby adjusting the oil inlet amount of the oil inlet chamber 11.

[0025] A connecting rod 63 is slidably disposed in the connecting channel 53, the left end of the connecting rod 63 is fixedly connected to the second inclined block 73, and the right end of the connecting rod 63 is fixedly connected to the rubber block 62. When the rubber block 62 slides left and right, the second inclined block 73 is driven to slide left and right through the connecting rod 63.

[0026] The working principle of the utility model is as follows:

[0027] When in use, when the oil supply of the oil outlet chamber 12 is greater than the required amount, the pressure in the oil outlet chamber 12 rises, and the engine oil will flow into the right chamber 52 through the first oil return channel 41, and push the rubber block 62 to move left under the action of pressure, thereby compressing the first spring 61, and the rubber block 62 no longer blocks the second oil return channel 42, and the engine oil can enter the oil inlet chamber 11 from the second oil return channel 42, thereby reducing the pressure at the oil outlet chamber 12 and avoiding the risk of excessive engine oil entering the combustion chamber; when the pressure in the oil outlet chamber 12 is still relatively high, the first spring 61 will be further compressed, and the rubber block 62 will continue to drive the connecting rod 63 to continue to move left, and the inclined surface of the second inclined block 73 will come into contact with the inclined surface of the first inclined block 72 And extrusion is generated, causing the second spring 71 to start stretching. Under the action of extrusion, the first inclined block 72 drives the baffle 74 to move downward, so that its lower end enters the oil inlet chamber 11, blocks part of the oil inlet chamber 11, reduces the oil inlet amount of the oil inlet chamber 11, and makes the pressure more stable; when the pressure at the oil outlet chamber 12 decreases, the first spring 61 gradually stretches and returns to its original state, causing the rubber block 62 to move to the right, blocking the hole of the second oil return channel 42. At this time, the incoming oil can only be discharged from the oil pump from the oil outlet. At the same time, since the first inclined block 72 is no longer squeezed by the second inclined block 73, the second spring 71 will also return to its original state, the baffle 74 will retreat to the limiting channel 54, and the oil inlet amount of the oil inlet chamber 11 will return to a normal level.

[0028] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A combustion engine oil pump, characterized in that: The pump comprises a pump body, wherein a driving gear and a driven gear are arranged inside the pump body, and the driving gear and the driven gear are meshed with each other; an oil inlet chamber and an oil outlet chamber are arranged on both sides of the meshing position of the driving gear and the driven gear, respectively, and the oil outlet chamber is connected to a first oil return channel, and a pressure regulating mechanism is connected to one end of the first oil return channel away from the oil outlet chamber; The pressure regulating mechanism comprises a left chamber, a right chamber and a connecting channel, the left and right ends of the connecting channel are connected to the left chamber and the right chamber respectively; the lower end of the first oil return channel is connected to the right end of the right chamber; the lower end of the right chamber is connected to the second oil return channel, and the lower end of the left chamber is connected to the limit channel; the lower end of the second oil return channel and the lower end of the limit channel are both connected to the oil inlet chamber; A one-way valve is arranged in the right chamber; the one-way valve comprises a first spring and a rubber block, the left end of the first spring is fixedly connected to the inner wall of the right chamber, and the right end of the first spring is fixedly connected to the rubber block; A blocking component is arranged in the left chamber.

2. A combustion engine oil pump according to claim 1, characterized in that: The blocking assembly includes a second spring, a first inclined block, and a second inclined block. The top end of the second spring is fixedly connected to the left chamber, the bottom end of the second spring is fixedly connected to the first inclined block, the bottom end of the first inclined block is fixedly connected to the baffle, and the baffle is slidably arranged in the limiting channel; the second inclined block is arranged on the right side of the first inclined block, and the inclined surface of the first inclined block and the inclined surface of the second inclined block are arranged opposite to each other.

3. A combustion engine oil pump according to claim 2, characterized in that: A connecting rod is slidably arranged in the connecting channel, the left end of the connecting rod is fixedly connected to the second inclined block, and the right end of the connecting rod is fixedly connected to the rubber block.

4. A combustion engine oil pump according to claim 2, characterized in that: The inclined surface of the first inclined block is arranged upward, and the inclined surface of the second inclined block is arranged downward.

5. A combustion engine oil pump according to claim 1, characterized in that: The first oil return channel and the second oil return channel are staggered.

6. A combustion engine oil pump according to claim 1, characterized in that: The driving gear is coaxially provided with a driving shaft, one end of the driving shaft passes through the outside of the pump body, and the driven gear is coaxially provided with a driven shaft.

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