Pneumatic pressure relief lubrication pump

Abstract

The utility model discloses a kind of pneumatic decompression type lubricating pump, avoid internal parts to occur larger sound due to rapid impact, it includes cylinder, pump base, oil tank and sliding plunger, cylinder and oil tank are respectively installed in pump base, pump base has oil inlet channel, oil discharge channel and sliding cavity in, one end of oil inlet channel is opened in sliding cavity, the other end of oil inlet channel is opened in oil tank, first check valve is installed in oil inlet channel, one end of oil discharge channel is opened in sliding cavity, the other end of oil discharge channel is opened in the outer side of pump base, second check valve is installed in oil discharge channel, sliding plunger is located in sliding cavity, cylinder drives sliding plunger and slides in sliding cavity along the axial direction of sliding plunger, so that sliding plunger penetrates into, penetrates out of sliding cavity to make the volume of sliding cavity gradually smaller and larger, cylinder has a gas inlet, the gas inlet is installed with a throttle valve or flow joint assembly, flow joint assembly has a gas inlet channel, the aperture of gas inlet channel is the aperture of gas inlet 1 / 20~1 / 3.

Description

Technical Field

[0001] This utility model relates to lubrication pumps, and more particularly to a pneumatic depressurization lubrication pump. Background Technology

[0002] A lubrication pump is a lubrication device that supplies lubricant to lubrication points. Mechanical equipment requires regular lubrication, and lubrication pumps effectively reduce equipment failures and extend its service life. Existing pneumatic pressure-release lubrication pumps use air as power to drive a plunger to reciprocate and pump oil. However, due to excessive or inconsistent air pressure, the plunger sometimes impacts the cylinder, producing loud noise and a poor customer experience. Therefore, there is an urgent need for a pneumatic pressure-release lubrication pump that avoids this impact and loud noise to overcome these shortcomings. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic depressurization lubrication pump that avoids loud noises caused by impacts.

[0004] To achieve the above objectives, the pneumatic depressurization lubrication pump of this utility model includes a cylinder, a pump base, an oil tank, and a sliding plunger. The cylinder and the oil tank are respectively mounted on the pump base. The pump base has an oil inlet channel, an oil outlet channel, and a sliding chamber. One end of the oil inlet channel opens into the sliding chamber, and the other end of the oil inlet channel opens into the oil tank. A first check valve is installed in the oil inlet channel. One end of the oil outlet channel opens into the sliding chamber, and the other end of the oil outlet channel opens onto the outer side of the pump base. A second check valve is installed in the oil outlet channel. The sliding plunger is located in the sliding chamber, and the cylinder drives the sliding plunger. The plunger slides along the axial direction of the sliding chamber, causing the plunger to enter and exit the sliding chamber, thus gradually decreasing and increasing the volume of the sliding chamber. The cylinder has an air inlet, on which a throttle valve or flow limiting connector assembly is installed. The flow limiting connector assembly has an air intake channel, the diameter of which is 1 / 20 to 1 / 3 of the diameter of the air inlet. During the process of the sliding plunger entering the sliding chamber, the first one-way valve closes and the second one-way valve opens. During the process of the sliding plunger exiting the sliding chamber, the first one-way valve opens and the second one-way valve closes.

[0005] Preferably, the flow restrictor assembly includes an air inlet connector and an insert. The air inlet connector has an air pipe docking cavity, the insert is installed in the air pipe docking cavity, an air inlet channel is formed in the insert, one end of the air inlet channel opens into the air pipe docking cavity, and the other end of the air inlet channel opens into the air inlet.

[0006] Preferably, a first spring is installed in the sliding cavity, the first spring abuts against the sliding plunger, and the first spring always has a tendency to push the sliding plunger out of the sliding cavity.

[0007] Preferably, the oil tank is located above the pump base, and the cylinder is located on one side of the pump base.

[0008] Preferably, the cylinder includes a cylinder barrel, a piston, a piston rod, and a piston spring. The piston rod is mounted on the piston, and the piston and piston rod are axially slidably mounted in the inner cavity of the cylinder barrel. The piston divides the inner cavity of the cylinder barrel into independent first and second chambers. The air inlet communicates with the first chamber. The piston spring is mounted in the second chamber and abuts against the piston. The piston spring always has a tendency to drive the piston away from the pump seat. The piston rod passes through the sliding chamber, and the end of the piston rod presses against the sliding plunger.

[0009] Preferably, the sliding plunger is widened at one end near the piston rod to form a pusher head that matches the diameter of the sliding cavity, and the end of the piston rod is pressed against the pusher head.

[0010] Preferably, the first check valve includes a second spring, a plug, and an oil inlet pipe. The oil inlet pipe is installed in the oil inlet channel, the second spring is installed in the oil inlet channel, and the plug is located between the second spring and the oil inlet pipe. The upper end of the oil inlet pipe is connected to the oil tank, and the lower end of the oil inlet pipe opens into the oil inlet channel. The plug is located between the second spring and the oil inlet pipe, and the second spring abuts against the plug. The second spring always has the tendency to push the plug to block the opening at the lower end of the oil inlet pipe.

[0011] Preferably, the second check valve divides the oil discharge channel into a first part and a second part. The second check valve includes a valve body, a valve plug, an umbrella-shaped sealing ring, and a third spring. The valve body has an installation cavity, an oil inlet is penetrating through the bottom side of the valve body, and an oil outlet is penetrating through the side side of the valve body. The valve plug is axially slidably installed in the installation cavity, and the valve plug divides the installation cavity into a connected upper cavity and a lower cavity. The first part is connected to the lower cavity through the oil inlet, and the second part is connected to the upper cavity through the oil outlet. The umbrella-shaped sealing ring is fitted onto the valve plug and located in the upper cavity. The third spring is located in the upper cavity and abuts against the valve plug. The third spring always has a tendency to push the valve plug downward. When the second check valve is in the open state, the umbrella-shaped sealing ring is arranged in a contracted manner so that its outer periphery is away from the inner wall of the upper cavity. When the second check valve is in the closed state, the umbrella-shaped sealing ring is arranged in an unfolded manner so that its outer periphery is close to the inner wall of the upper cavity.

[0012] Preferably, the top of the valve body is provided with a pressure relief port. When the second check valve is in the open state, the valve plug is inserted into the pressure relief port to block the pressure relief port and open the oil inlet. When the second check valve is in the closed state, the valve plug is removed from the pressure relief port and blocks the oil inlet. The upper chamber is connected to the second part through the pressure relief port.

[0013] Preferably, the oil drain channel has a bent structure, with the first part extending vertically and the second part extending horizontally.

[0014] Compared with the prior art, in the embodiments provided by this utility model, a flow-limiting connector assembly is installed at the air inlet. The flow-limiting connector assembly has an air inlet channel, the diameter of which is 1 / 20 to 1 / 3 of the diameter of the air inlet. That is to say, the diameter of the air inlet channel is much smaller than the diameter of the air inlet, so as to limit the instantaneous input of a large amount of air into the cylinder, which would cause a loud noise due to the impact of parts during rapid operation. Conversely, by narrowing the air inlet channel, air cannot be injected into the cylinder in a large amount instantaneously, but can only be injected into the cylinder in small amounts and slowly, so that the parts inside the cylinder do not move rapidly, avoiding loud noise caused by rapid impact of internal parts, and improving the customer experience. Attached Figure Description

[0015] Figure 1 This is a perspective view of the pneumatic depressurization lubrication pump of this utility model.

[0016] Figure 2 This is a perspective view of the pneumatic depressurization lubrication pump of this utility model when it is separated from the cylinder.

[0017] Figure 3 This is a perspective view of the pneumatic depressurization lubrication pump of this utility model after it is hidden in the oil tank.

[0018] Figure 4 This is a left view of the pneumatic depressurization lubrication pump of this utility model.

[0019] Figure 5 This utility model relates to a pneumatic depressurization lubrication pump. Figure 4 The sectional view obtained after cutting along line segment AA.

[0020] Figure 6 yes Figure 5 Enlarged view of the structure at point B.

[0021] Figure 7 yes Figure 5 An enlarged view of the structure at point C, where the second check valve is in the open state.

[0022] Figure 8 yes Figure 5 Enlarged view of the structure at point C when the second check valve is in the closed state.

[0023] Figure 9 This is a perspective view of the second one-way valve of this utility model.

[0024] Figure 10 This is an exploded perspective view of the current limiting connector assembly of this utility model.

[0025] Figure 11 This is a top view of the pump base of this utility model.

[0026] Figure 12This utility model relates to the pump seat edge Figure 11 The sectional view obtained after cutting the DD line segment. Detailed Implementation

[0027] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0028] like Figures 1 to 6 , Figure 9 As shown, this utility model discloses a pneumatic depressurization lubrication pump 100, including a cylinder 10, a pump base 20, an oil tank 30, and a sliding plunger 40. The cylinder 10 and the oil tank 30 are respectively mounted on the pump base 20, which has an oil inlet channel 21, an oil outlet channel 22, and a sliding chamber 23. One end of the oil inlet channel 21 opens into the sliding chamber 23, and the other end opens into the oil tank 30. A first check valve 50 is installed in the oil inlet channel 21. One end of the oil outlet channel 22 opens into the sliding chamber 23, and the other end opens onto the outer surface of the pump base 20. A second check valve 60 is installed in the oil outlet channel 22. The sliding plunger 40 is located in the sliding cavity 23. The cylinder 10 drives the sliding plunger 40 to slide along the axial direction of the sliding plunger 40 in the sliding cavity 23, so that the sliding plunger 40 enters and exits the sliding cavity 23, causing the volume of the sliding cavity 23 to gradually decrease and increase.

[0029] The cylinder 10 has an air inlet 11. In the embodiment provided by this utility model, a flow-limiting connector assembly 70 is installed on the air inlet 11. The flow-limiting connector assembly 70 has an air intake channel 71. The diameter of the air intake channel 71 is 1 / 20 to 1 / 3 of the diameter of the air inlet 11. That is to say, the diameter of the air intake channel 71 is much smaller than the diameter of the air inlet 11, so as to limit the instantaneous input of a large amount of air into the cylinder 10, which would cause a loud noise due to the impact of the parts during rapid operation. Conversely, by reducing the size of the air intake channel 71, air cannot be injected into the cylinder 10 in a large amount instantaneously. It can only be injected into the cylinder 10 in small amounts and slowly, so that the parts inside the cylinder 10 do not move rapidly, avoiding loud noise caused by rapid impact of the internal parts, and improving the customer experience.

[0030] As the sliding plunger 40 penetrates the sliding cavity 23, the volume of the sliding cavity 23 gradually decreases. The first check valve 50 closes, preventing oil from flowing into the sliding cavity 23 from the oil tank 30. The second check valve 60 opens, and the sliding plunger 40 pushes the oil in the sliding cavity 23 towards the oil discharge channel 22 for pumping. The state at this time is as follows: Figure 6 and Figure 7 As shown, during the process of the sliding plunger 40 exiting the sliding chamber 23, the first check valve 50 opens, and the oil in the oil tank 30 flows into the oil inlet channel 21 and then into the sliding chamber 23 for replenishment. The second check valve 60 closes, and the oil in the sliding chamber 23 cannot flow out. At this time, the state is as follows. Figure 8 As shown.

[0031] Preferably, in the embodiments provided by this utility model, the diameter of the air intake channel 71 is 1 / 8 of the diameter of the air intake port 11, but is not limited to this ratio, in order to avoid a large amount of air being injected into the cylinder 10 instantaneously.

[0032] like Figures 3 to 6 , Figure 10 As shown, the flow-limiting connector assembly 70 includes an air inlet connector 72 and an insert 73. The air inlet connector 72 has an air pipe docking cavity 721. The insert 73 is installed in the air pipe docking cavity 721, and an air inlet channel 71 is formed within the insert 73. One end of the air inlet channel 71 opens into the air pipe docking cavity 721, and the other end opens into the air inlet 11. An external air pipe is inserted into the air pipe docking cavity 721 for convenient and stable delivery of compressed air.

[0033] like Figure 5 As shown, a first spring 24 is installed in the sliding cavity 23. The first spring 24 abuts against the sliding plunger 40. The first spring 24 always has the tendency to push the sliding plunger 40 out of the sliding cavity 23. The first spring 24 enables the sliding plunger 40 to automatically reset, thereby increasing the volume of the sliding cavity 23.

[0034] like Figures 1 to 5 As shown, the oil tank 30 is located above the pump base 20, and the cylinder 10 is located on one side of the pump base 20.

[0035] like Figures 1 to 5 As shown, cylinder 10 includes cylinder barrel 12, piston 13, piston rod 14, and piston spring 15. Piston rod 14 is mounted on piston 13, and piston 13 and piston rod 14 are axially slidably mounted within the cavity of cylinder barrel 12. Piston 13 divides the cavity of cylinder barrel 12 into independent first chamber 121 and second chamber 122. Air inlet 11 communicates with first chamber 121. Piston spring 15 is mounted in second chamber 122, abutting against piston 13. Piston spring 15 constantly tends to drive piston 13 away from pump seat 20. Piston rod 14 penetrates into sliding chamber 23, and the end of piston rod 14 presses against sliding plunger 40. After compressed air is supplied to first chamber 121 through flow-limiting connector assembly 70, piston 13 is pushed, and piston rod 14 pushes sliding plunger 40 into sliding chamber 23. After the compressed air supply stops, the sliding plunger 40 exits the sliding cavity 23 under the push of the first spring 24.

[0036] like Figure 5 As shown, the sliding plunger 40 is widened at one end near the piston rod 14, thereby forming a push head 41 that matches the diameter of the sliding cavity 23. The end of the piston rod 14 is pressed against the push head 41. The push head 41 is provided to facilitate the piston rod 14 to push the sliding plunger 40.

[0037] like Figure 5 As shown, the first check valve 50 includes a second spring 51, a plug 52, and an oil inlet pipe 53.

[0038] An oil inlet pipe 53 is installed in an oil inlet channel 21. A second spring 51 is also installed in the oil inlet channel 21. A plug 52 is positioned between the second spring 51 and the oil inlet pipe 53. The upper end of the oil inlet pipe 53 is connected to the oil tank 30, and the lower end of the oil inlet pipe 53 opens into the oil inlet channel 21. The plug 52 is positioned between the second spring 51 and the oil inlet pipe 53, and the second spring 51 abuts against the plug 52. The second spring 51 has a constant tendency to push the plug 52 to block the opening at the lower end of the oil inlet pipe 53. When the volume of the sliding cavity 23 gradually increases, a negative pressure is generated, the plug 52 moves downward, the second spring 51 is compressed, and oil flows into the sliding cavity 23. When the volume of the sliding cavity 23 gradually decreases, under the pushing force of the second spring 51, the plug 52 moves upward, blocking the lower end of the oil inlet pipe 53 and cutting off the connection between the oil tank 30 and the sliding cavity 23.

[0039] like Figure 5 , Figure 7 , Figure 8 , Figure 9 , Figure 11 and Figure 12 As shown, the second check valve 60 divides the oil discharge channel 22 into a first part 221 and a second part 222. The second check valve 60 includes a valve body 61, a valve plug 62, an umbrella-shaped sealing ring 63, and a third spring 64. The valve body 61 has an installation cavity, with an oil inlet 611 penetrating its bottom side and an oil outlet 612 penetrating its side side. The valve plug 62 is axially slidably installed in the installation cavity, dividing it into a connected upper cavity 613 and a lower cavity 614. The first part 221 is connected to the lower cavity 614 via the oil inlet 611, and the second part 222 is connected to the upper cavity 613 via the oil outlet 612. The umbrella-shaped sealing ring 63 is fitted onto the valve plug 62 and located in the upper cavity 613. The third spring 64 is located in the upper cavity 613 and abuts against the valve plug 62, and the third spring 64 always has a tendency to push the valve plug 62 downwards. When the second check valve 60 is in the open state, the umbrella-shaped sealing ring 63 is arranged in a contracted position, with its outer periphery away from the inner wall of the upper cavity 613, preventing oil from flowing from the second part 222 to the first part 221 and avoiding backflow. When the second check valve 60 is in the closed state, the umbrella-shaped sealing ring 63 is arranged in an unfolded position, with its outer periphery pressed tightly against the inner wall of the upper cavity 613, allowing oil to flow from the first part 221 to the second part 222, performing the oiling action.

[0040] Furthermore, to facilitate pressure relief, a pressure relief port 615 is provided at the top of the valve body 61. When the second check valve 60 is in the open state, the valve plug 62 inserts into the pressure relief port 615, thereby sealing the pressure relief port 615 and opening the oil inlet 611. The oil cannot flow into the oil tank 30 and can only flow out through the oil outlet 612, eventually flowing to the second part 222. When the second check valve 60 is in the closed state, the valve plug 62 exits from the pressure relief port 615 and seals the oil inlet 611. The upper chamber 613 is connected to the second part 222 through the pressure relief port 615. The oil in the second part 222 eventually flows back to the oil tank 30, and the oil cannot flow through the oil inlet 611.

[0041] like Figure 11 and Figure 12 As shown, the oil drain channel 22 has a bent structure, with the first part 221 extending vertically and the second part 222 extending horizontally.

[0042] The following is a brief description of the working process of the pneumatic compaction lubrication pump of this utility model: Compressed air is supplied to the first chamber 121. The piston 13 and piston rod 14 slide closer to the pump seat 20, pushing the sliding plunger 40 into the sliding chamber 23. The volume of the sliding chamber 23 gradually decreases. The first one-way valve 50 closes, and the second one-way valve 60 opens. The oil in the sliding chamber 23 is pushed into the first part 221, and then flows into the second part 222, pumping oil outwards. When the supply of compressed air to the first chamber 121 is stopped, the piston 13 and piston rod 14 slide away from the pump seat 20 under the push of the piston spring 15. Under the push of the first spring 24, the sliding plunger 40 exits the sliding chamber 23. The volume of the sliding chamber 23 gradually decreases. The second one-way valve 60 closes, and the first one-way valve 50 opens. The oil in the oil tank 30 flows into the sliding chamber 23 to replenish the oil for the next pumping operation. By continuously repeating the above two actions, oil can be continuously pumped out.

[0043] When the equipment stops, the second check valve 60 is closed, the valve plug 62 exits the pressure relief port 615 and blocks the oil inlet 611, the upper chamber 613 is connected to the second part 222 through the pressure relief port 615, the oil in the second part 222 flows into the upper chamber 613 and then flows back to the oil tank 30 to achieve pressure relief.

[0044] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A pneumatic depressurization lubrication pump, characterized in that: The pump assembly includes a cylinder, a pump base, an oil tank, and a sliding plunger. The cylinder and the oil tank are respectively mounted on the pump base. The pump base has an oil inlet channel, an oil outlet channel, and a sliding cavity. One end of the oil inlet channel opens into the sliding cavity, and the other end opens into the oil tank. A first check valve is installed in the oil inlet channel. One end of the oil outlet channel opens into the sliding cavity, and the other end opens onto the outer surface of the pump base. A second check valve is installed in the oil outlet channel. The sliding plunger is located in the sliding cavity, and the cylinder drives the sliding plunger to move along the sliding cavity. The sliding plunger slides axially, causing it to enter and exit the sliding cavity, thus gradually decreasing and increasing the volume of the sliding cavity. The cylinder has an air inlet, on which a throttle valve or flow restrictor assembly is installed. The flow restrictor assembly has an air intake channel, the diameter of which is 1 / 20 to 1 / 3 of the diameter of the air inlet. During the process of the sliding plunger entering the sliding cavity, the first one-way valve is closed and the second one-way valve is open. During the process of the sliding plunger exiting the sliding cavity, the first one-way valve is open and the second one-way valve is closed.

2. The pneumatic depressurization lubrication pump according to claim 1, characterized in that, The flow-limiting connector assembly includes an air inlet connector and an insert. The air inlet connector has an air pipe docking cavity. The insert is installed in the air pipe docking cavity. The air inlet channel is formed in the insert. One end of the air inlet channel opens into the air pipe docking cavity, and the other end of the air inlet channel opens into the air inlet.

3. The pneumatic depressurization lubrication pump according to claim 1, characterized in that, A first spring is installed in the sliding cavity, and the first spring abuts against the sliding plunger. The first spring always has a tendency to push the sliding plunger out of the sliding cavity.

4. The pneumatic depressurization lubrication pump according to claim 1, characterized in that, The oil tank is located above the pump base, and the cylinder is located on one side of the pump base.

5. The pneumatic depressurization lubrication pump according to claim 1, characterized in that, The cylinder includes a cylinder barrel, a piston, a piston rod, and a piston spring. The piston rod is mounted on the piston. The piston and the piston rod are axially slidably mounted in the inner cavity of the cylinder barrel. The piston divides the inner cavity of the cylinder barrel into an independent first chamber and a second chamber. The air inlet communicates with the first chamber. The piston spring is mounted in the second chamber and abuts against the piston. The piston spring always has a tendency to drive the piston away from the pump seat. The piston rod passes through the sliding chamber, and the end of the piston rod is pressed against the sliding plunger.

6. The pneumatic depressurization lubrication pump according to claim 5, characterized in that, The sliding plunger is widened at one end near the piston rod to form a push head that matches the diameter of the sliding cavity, and the end of the piston rod is pressed against the push head.

7. The pneumatic depressurization lubrication pump according to claim 1, characterized in that, The first one-way valve includes a second spring, a plug, and an oil inlet pipe. The oil inlet pipe is installed in the oil inlet channel, the second spring is installed in the oil inlet channel, and the plug is located between the second spring and the oil inlet pipe. The upper end of the oil inlet pipe is connected to the oil tank, and the lower end of the oil inlet pipe opens into the oil inlet channel. The plug is located between the second spring and the oil inlet pipe, and the second spring abuts against the plug. The second spring always has a tendency to push the plug to block the opening at the lower end of the oil inlet pipe.

8. The pneumatic depressurization lubrication pump according to claim 1, characterized in that, The second one-way valve divides the oil discharge channel into a first part and a second part. The second one-way valve includes a valve body, a valve plug, an umbrella-shaped sealing ring, and a third spring. The valve body has an installation cavity, an oil inlet is penetrating through the bottom side of the valve body, and an oil outlet is penetrating through the side side of the valve body. The valve plug is axially slidably installed in the installation cavity, and the valve plug divides the installation cavity into a connected upper cavity and a lower cavity. The first part is connected to the lower cavity through the oil inlet, and the second part is connected to the upper cavity through the oil outlet. The umbrella-shaped sealing ring is fitted onto the valve plug and is located in the upper cavity. The third spring is located in the upper cavity and abuts against the valve plug. The third spring always has a tendency to push the valve plug downward. When the second one-way valve is in the open state, the umbrella-shaped sealing ring is contracted so that its outer periphery is away from the inner wall of the upper cavity. When the second one-way valve is in the closed state, the umbrella-shaped sealing ring is unfolded so that its outer periphery is close to the inner wall of the upper cavity.

9. The pneumatic depressurization lubrication pump according to claim 8, characterized in that, The valve body has a pressure relief port at the top. When the second check valve is in the open state, the valve plug is inserted into the pressure relief port to block the pressure relief port and open the oil inlet. When the second check valve is in the closed state, the valve plug is removed from the pressure relief port and blocks the oil inlet. The upper cavity is connected to the second part through the pressure relief port.

10. The pneumatic depressurization lubrication pump according to claim 8, characterized in that, The oil drain channel has a bent structure, with the first part extending vertically and the second part extending horizontally.

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