Automatic venting oil tank of multi-point electric grease pump

Abstract

An automatic venting oil tank for a multi-point electric grease pump includes a base, an oil tank located above and connected to the base, a sealable oil tank cover attached to the top of the oil tank, a one-way vent valve fixedly installed on the oil tank cover and communicating with the inside of the oil tank, a guide vent rod communicating with the one-way vent valve and extending to the bottom of the oil tank, and a pressure piston assembly sleeved on the guide vent rod and cooperating with the inner side wall of the oil tank for up-and-down movement. The pressure piston has at least one venting channel, with the inlet end of the venting channel located on the outer side wall of the pressure piston and the outlet end fitting against the outer side wall of the guide vent rod. A guide venting channel is located on the upper part of the guide vent rod corresponding to the outlet end of the venting channel, with the inlet end of the guide venting channel located on the outer side wall of the guide vent rod and the outlet end communicating with the one-way vent valve. This design has the advantages of timely air discharge and high venting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of grease pumps for engineering machinery, specifically an automatic venting oil tank for a multi-point electric grease pump. Background Technology

[0002] High-viscosity greases are widely used in low-speed, heavy-load moving parts of many mechanical equipment due to their high oil film strength and good shape retention. In some engineering wind power machinery, the oil pumps are in a rotating state for extended periods. These pumps typically draw in high-viscosity grease via a pressure piston inside the pump itself. After drawing in the high-viscosity grease, the air trapped inside the pressure piston and pump, as well as the air trapped within the grease, is difficult to expel. The air trapped within the high-viscosity grease, in particular, is difficult to escape due to its good shape retention. Existing venting designs typically use a vent hole fixed on the side of the pump. While this design allows for some air expulsion, it is ineffective for air located far from the vent hole. A significant amount of air remains inside the pump, affecting its normal operation (due to the descent of the pressure piston). The air trapped within the grease also reduces its lubricating properties. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic exhaust oil tank for a multi-point electric grease pump that can promptly exhaust air and has high exhaust efficiency.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an automatic exhaust oil tank for a multi-point electric grease pump, including a base, an oil tank located above and connected to the base, an oil tank cover that can be sealed to the top of the oil tank, a one-way exhaust valve fixedly installed on the oil tank cover and communicating with the inside of the oil tank, a guide exhaust rod communicating with the one-way exhaust valve and extending to the bottom of the oil tank, and a pressure piston assembly sleeved on the guide exhaust rod and cooperating with the inner side wall of the oil tank for up-and-down movement. The pressure piston assembly includes a pressure piston and a Y-shaped sealing ring. The Y-shaped sealing ring is inserted into the outer side wall of the pressure piston and cooperates with the inner side wall of the oil tank to achieve a seal between the pressure piston assembly and the inner side wall of the oil tank. The base, oil tank, lower part of the pressure piston and guide exhaust rod are connected to the guide exhaust rod. A closed space for grease is formed between the four outer walls of the exhaust rod section. The oil pressure piston has at least one exhaust channel. The air inlet of the exhaust channel is located on the outer wall of the oil pressure piston, and the air outlet is in contact with the outer wall of the guide exhaust rod. A guide exhaust channel is opened on the upper part of the guide exhaust rod corresponding to the air outlet of the exhaust channel. The air inlet of the guide exhaust channel is located on the outer wall of the guide exhaust rod, and the air outlet is connected to the one-way exhaust valve. When the oil pressure piston assembly moves up to the upper limit position, the air outlet of the exhaust channel and the air inlet of the guide exhaust channel are in contact and connected, and the air in the oil tank and the air wrapped in grease are discharged. After the oil pressure piston assembly moves down, the air outlet of the exhaust channel and the air inlet of the guide exhaust channel are misaligned and no longer connected.

[0005] Furthermore, the lower part of the oil piston has multiple exhaust channels, and the upper part of the guide exhaust rod has multiple guide exhaust channels corresponding to the exhaust channel outlet positions.

[0006] Furthermore, the exhaust channels are evenly distributed at the same angle around the lower part of the oil pressure piston, and a retaining ring is provided between the exhaust outlet ends of the multiple exhaust channels. The retaining ring cooperates with the outer wall of the guide exhaust rod. The guide exhaust channels are evenly distributed at the same angle around the upper part of the guide exhaust rod. The exhaust channels are independent of each other and do not communicate with each other.

[0007] Furthermore, an air intake gap is reserved between the air intake end of the exhaust channel and the inner wall of the fuel tank.

[0008] Furthermore, an exhaust valve seat is fixedly provided on the fuel tank cover, and the one-way exhaust valve is fixedly installed on the exhaust valve seat. The upper part of the guide exhaust rod passes through the exhaust valve seat and communicates with the one-way exhaust valve. The one-way exhaust valve includes an exhaust valve body, an exhaust valve core located in the exhaust valve body to control the air discharge, a pressure adjusting screw installed in the exhaust valve body, and an exhaust valve spring. A spring positioning sleeve is also fixedly provided on the lower surface of the fuel tank cover, and an oil pressure spring is connected between the spring positioning sleeve and the oil pressure piston.

[0009] Furthermore, an oil seal is provided between the oil pressure piston and the guide exhaust rod, a magnetic ring is embedded on the outer wall of the oil pressure piston, and a magnetic switch is fixedly provided on the base. The magnetic switch is connected and cooperates with the magnetic ring and senses the electromagnetic signal emitted by the magnetic ring to provide an early warning when the oil level is low.

[0010] The beneficial effects of this utility model are as follows: This utility model connects the exhaust channel and the outlet channel at the upper limit position of the vertically moving oil pressure piston assembly. Combined with the gradually increasing air pressure within the enclosed space where grease is retained, this achieves efficient discharge of air and grease-encased air from the enclosed space of the oil tank. When the oil pressure piston assembly moves downwards, the exhaust channel and outlet channel are misaligned and no longer connected, preparing for the next exhaust cycle. The design of the exhaust channel on the vertically moving oil pressure piston allows for dynamic opening and closing of the overall exhaust passage, enabling timely and efficient discharge of large quantities of air from the enclosed space. This avoids the problems of low exhaust volume and poor performance in existing technologies. The design of multiple exhaust channels on the oil pressure piston, along with multiple outlet channels connected to the exhaust channels, increases the exhaust volume of the oil pressure piston in a single exhaust stroke, facilitating the discharge of large amounts of air from the entire oil tank and directly improving the overall exhaust efficiency of the oil tank. Attached Figure Description

[0011] Figure 1 This is an external side view of the automatic venting oil tank of a multi-point electric grease pump.

[0012] Figure 2 This is a partial cross-sectional schematic diagram of the automatic venting oil tank of a multi-point electric grease pump when the oil level is low.

[0013] Figure 3 This is a partial cross-sectional schematic diagram of the automatic venting oil tank of a multi-point electric grease pump at a high oil level.

[0014] Figure 4 yes Figure 3 A cross-sectional schematic diagram of the location of the central exhaust channel.

[0015] Figure 5 This is a partial cross-sectional diagram of the automatic venting oil tank of a multi-point electric grease pump as the oil pan component moves away from the high oil level and descends.

[0016] Figure 6 yes Figure 5 A cross-sectional schematic diagram of the location of the central exhaust channel.

[0017] Figure 7 This is a partial cross-sectional view of the guide exhaust rod.

[0018] Figure 8 This is a partial cross-sectional schematic diagram of the oil pressure piston. Detailed Implementation

[0019] In order to make the technical means, innovative features and functions of this utility model easy to understand, this utility model will be further described below.

[0020] like Figure 1-8 As shown, the technical solution of the automatic venting oil tank of the multi-point electric grease pump of this utility model includes a base 3, an oil tank 10 located above and connected to the base 3, an oil tank cover 13 that can be sealed to the top of the oil tank 10, a one-way venting valve 16 fixedly installed on the oil tank cover 13 and communicating with the inside of the oil tank 10, a guide venting rod 12 communicating with the one-way venting valve 16 and extending to the bottom of the oil tank 10, and a pressure piston assembly 9 sleeved on the guide venting rod 12 and cooperating with the inner side wall of the oil tank 10 for up-and-down movement. The pressure piston assembly 9 includes a pressure piston 9.2 and a Y-shaped sealing ring 9.3. The Y-shaped sealing ring 9.3 is inserted into the outer side wall of the pressure piston 9.2 and cooperates with the inner side wall of the oil tank 10 to achieve a seal between the pressure piston assembly 9 and the inner side wall of the oil tank 10. The lower part of the base 3, the oil tank 10, the pressure piston 9.2 and the guide venting rod 12 are connected to the guide venting rod 13. A closed space for grease is formed between the four outer walls of the exhaust rod 12. The oil pressure piston 9.2 has at least one exhaust channel 17. The air inlet of the exhaust channel 17 is located on the outer wall of the oil pressure piston 9.2, and the air outlet is in contact with the outer wall of the guide exhaust rod 12. The upper part of the guide exhaust rod 12 has a guide exhaust channel 18 corresponding to the air outlet of the exhaust channel 17. The air inlet of the guide exhaust channel 18 is located on the outer wall of the guide exhaust rod 12, and the air outlet is connected to the one-way exhaust valve 16. When the oil pressure piston assembly 9 moves up to the upper limit position, the air outlet of the exhaust channel 17 and the air inlet of the guide exhaust channel 18 are in contact and connected, and the air and the air wrapped in grease in the oil tank 10 are discharged. After the oil pressure piston assembly 9 moves down, the air outlet of the exhaust channel 17 and the air inlet of the guide exhaust channel 18 are misaligned and no longer connected.

[0021] In a preferred embodiment of this utility model, such as Figure 3-6As shown, the lower part of the hydraulic piston 9.2 has four exhaust channels 17, and the upper part of the guide exhaust rod 12 has four guide exhaust channels 18 corresponding to the exhaust channel 17 outlet positions. The exhaust channels 17 are evenly distributed circumferentially at the lower part of the hydraulic piston 9.2, and the included angle between two adjacent exhaust channels 17 is 90°. A retaining ring 9.5 is also provided between the outlet ends of the four exhaust channels 17, and the retaining ring 9.5 cooperates with the outer wall of the guide exhaust rod 12. The guide exhaust channels 18 are evenly distributed circumferentially at the upper part of the guide exhaust rod 12, and the included angle between two adjacent guide exhaust channels 18 is 90°. The exhaust channels 17 are independent of each other and do not communicate with each other, and the guide exhaust channels 18 are independent of each other and do not communicate with each other. The independent and non-connected design of the exhaust channels 17 and outlet channels 18, which are evenly spaced and mutually independent, greatly improves the overall exhaust efficiency of the exhaust tank. Moreover, the design of exhaust channels 17 and outlet channels 18 distributed in four directions inside the tank 10 can cover the internal corners of the tank 10 without dead angles, so as to exhaust the air inside the tank 10. This completely avoids the problem that the exhaust port with a fixed position on one side in the prior art is difficult to exhaust air far away from the exhaust port position. The exhaust is more direct and efficient. In addition, even if some exhaust channels 17 and outlet channels 18 are blocked by grease in actual application, it will not affect the normal operation of other unblocked exhaust channels 17 and outlet channels 18.

[0022] In the above embodiments, such as Figure 3 As shown, an exhaust valve seat 15 is also fixedly provided on the oil tank cover 13. The one-way exhaust valve 16 is fixedly installed on the exhaust valve seat 15. The upper part of the guide exhaust rod 12 passes through the exhaust valve seat 15 and communicates with the one-way exhaust valve 16. The one-way exhaust valve 16 includes an exhaust valve body 16.4, an exhaust valve core 16.3 located in the exhaust valve body 16.4 to control the air discharge, an adjusting screw 16.1 installed in the exhaust valve body 16.4, and an exhaust valve spring 16.2. A spring positioning sleeve 14 is also fixedly provided on the lower surface of the oil tank cover 13. An oil pressure spring 11 is connected between the spring positioning sleeve 14 and the oil pressure piston 9.2.

[0023] like Figure 2 As shown, after the automatic exhaust oil tank of the multi-point electric grease pump of this utility model starts working, the motor reducer 4 runs and the output shaft of the motor reducer 4 drives the eccentric wheel 5 to rotate synchronously, which drives the plunger 7 to complete the oil pressure working stroke. With the continued rotation of the eccentric wheel 5, the eccentric movement of the L-shaped disk 6 drives the plunger 7 to complete the oil suction working stroke. Through this repeated cycle of oil pressure and suction stroke changes, the grease pump continuously delivers lubricating grease to multiple lubrication points.

[0024] like Figure 2-6As shown, when the automatic venting oil tank of the multi-point electric grease pump in the above embodiment is initially filled, the high-viscosity lubricating grease enters the base 3 through the filling quick-connect 2. The air and grease in the base 3 enter the oil tank 10, pushing the oil pressure piston assembly 9 upward to the upper limit position, that is, the oil pressure piston 9.2 contacts the spring positioning sleeve 14. At this time, the exhaust channel 17 on the oil pressure piston 9.2 is connected to the air outlet channel 18 on the guide exhaust rod 12. As the grease continues to be injected from the quick-connect 2, the pressure in the oil tank 10 gradually increases. The air wrapped by the grease separates from the grease and enters the exhaust channel 17 together with the air remaining in the oil tank 10 from the air inlet end of the four exhaust channels 17 and enters the interior of the retaining ring 9.5. Then, it enters the guide exhaust rod 12 through the air inlet end of the guide exhaust channel 18. As the grease is injected into the oil tank 10 from the filling quick-connect 2, the air entering the guide exhaust rod 12 is finally discharged through the one-way exhaust valve 16, thereby realizing the efficient discharge of air inside the automatic venting oil tank of the multi-point electric grease pump. During this process, the one-way exhaust valve 16 ensures that the air inside the oil tank 10 can be discharged to the outside of the oil tank 10, while the air outside the oil tank 10 cannot enter the oil tank 10 through the one-way exhaust valve 16. The one-way exhaust valve 16 has the function of a back pressure valve, which can reduce the grease in the closed space at the bottom of the oil piston 9.2 under the action of the oil pressure spring 11 from accidentally entering the guide exhaust rod 12 through the exhaust channel 17, and then being discharged to the outside of the oil tank 10 through the one-way exhaust valve 16.

[0025] During the continuous delivery of lubricating grease to multiple lubrication points by the grease pump, the oil pressure piston assembly 9 moves downward under the combined action of air pressure and oil pressure spring 11. The exhaust end of the exhaust channel 17 is misaligned with the inlet end of the guide exhaust channel 18, thus the exhaust end of the exhaust channel 17 is blocked by the outer wall of the guide exhaust rod 12. This effectively avoids the problem of residual air in the guide exhaust rod 12 mixing into the lower closed space of the oil tank 10 during the downward movement of the oil pressure piston assembly 9. Moreover, during the upward and downward movement of the oil pressure piston assembly 9, the guide exhaust rod 12 plays a role in stabilizing and supporting the oil pressure piston assembly 9, effectively preventing the oil pressure piston assembly 9 from flipping or getting stuck in the oil tank 10.

[0026] like Figure 1-2As shown, during the overall design, an air intake gap is reserved between the air intake end of the exhaust channel 17 and the inner wall of the oil tank 10. The reserved air intake gap effectively reduces the air intake pressure at the air intake end of the exhaust channel 17, preventing air from accumulating at the air intake end of the exhaust channel 17 and avoiding the problem of air difficulty entering the interior of the exhaust channel 17. This improves air intake efficiency and reduces the possibility of damage to the air intake end of the exhaust channel 17 due to excessive air pressure. An oil seal 9.1 is also provided between the oil pressure piston 9.2 and the guide exhaust rod 12. A magnetic ring 9.4 is embedded on the outer wall of the oil pressure piston 9.2. A magnetic induction switch 1 is fixedly provided on the base 3. The magnetic induction switch 1 is connected and cooperates with the magnetic ring 9.4 and senses the electromagnetic signal emitted by the magnetic ring 9.4, providing an early warning when the oil level is low. In practical applications, the electromagnetic signal can be converted into a digital signal through various electromagnetic signal conversion devices, making it convenient for users to replenish the lubricating grease in a timely manner.

[0027] Although the present invention has been disclosed above with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended claims.

Claims

1. An automatic vented sump for a multi-point electric grease pump, characterized in that: Includes a base (3), an oil tank (10) located above and connected to the base (3), an oil tank cover (13) that can be sealed to the top of the oil tank (10), a one-way exhaust valve (16) fixedly installed on the oil tank cover (13) and communicating with the inside of the oil tank (10), a guide exhaust rod (12) communicating with the one-way exhaust valve (16) and extending to the bottom of the oil tank (10), and a sleeve on the guide exhaust rod (12) and connected to the inner wall of the oil tank (10). The hydraulic piston assembly (9) moves up and down in coordination with the hydraulic piston (9). The hydraulic piston assembly (9) includes a hydraulic piston (9.2) and a Y-type sealing ring (9.3). The Y-type sealing ring (9.3) is inserted into the outer wall of the hydraulic piston (9.2) and cooperates with the inner wall of the oil tank (10) to achieve a seal between the hydraulic piston assembly (9) and the inner wall of the oil tank (10). The lower part of the base (3), the oil tank (10), the hydraulic piston (9.2) and the guide exhaust rod (12) are connected. The four outer walls of the oil press piston (9.2) form a closed space for grease to be contained. At least one exhaust channel (17) is opened on the oil press piston (9.2). The air inlet of the exhaust channel (17) is located on the outer wall of the oil press piston (9.2), and the air outlet is attached to the outer wall of the guide exhaust rod (12). The upper part of the guide exhaust rod (12) is provided with a guide exhaust channel (18) corresponding to the air outlet of the exhaust channel (17). The air inlet of the guide exhaust channel (18) is located on the outer wall of the guide exhaust rod (12), and the air outlet is connected to the one-way exhaust valve (16). When the oil press piston assembly (9) moves up to the upper limit position, the air outlet of the exhaust channel (17) is attached to and connected to the air inlet of the guide exhaust channel (18). The air in the oil tank (10) and the air wrapped in grease are discharged. After the oil press piston assembly (9) moves down, the air outlet of the exhaust channel (17) and the air inlet of the guide exhaust channel (18) are misaligned and no longer connected.

2. The self-venting sump for a multipoint electrically powered grease pump of claim 1, wherein: The lower part of the oil piston (9.2) has multiple exhaust channels (17), and the upper part of the guide exhaust rod (12) has multiple guide exhaust channels (18) corresponding to the exhaust end position of the exhaust channels (17).

3. The self-venting sump for a multipoint electrically powered grease pump of claim 2, wherein: The exhaust channels (17) are evenly distributed at the same angle around the lower part of the oil pressure piston (9.2). A retaining ring (9.5) is also provided between the exhaust outlets of the multiple exhaust channels (17). The retaining ring (9.5) cooperates with the outer wall of the guide exhaust rod (12). The guide exhaust channels (18) are evenly distributed at the same angle around the upper part of the guide exhaust rod (12). The exhaust channels (17) are independent of each other and do not communicate with each other. The guide exhaust channels (18) are independent of each other and do not communicate with each other.

4. The self-bleeding sump of a multi-point electrically driven grease pump according to claim 1 or 2 or 3, characterized in that: An air intake gap is reserved between the air intake end of the exhaust channel (17) and the inner wall of the oil tank (10).

5. The automatic venting oil tank of the multi-point electric grease pump according to claim 1, 2, or 3, characterized in that: An exhaust valve seat (15) is also fixedly provided on the oil tank cover (13). The one-way exhaust valve (16) is fixedly installed on the exhaust valve seat (15). The upper part of the guide exhaust rod (12) passes through the exhaust valve seat (15) and communicates with the one-way exhaust valve (16). The one-way exhaust valve (16) includes an exhaust valve body (16.4), an exhaust valve core (16.3) located in the exhaust valve body (16.4) to control the air discharge, an adjusting screw (16.1) installed in the exhaust valve body (16.4), and an exhaust valve spring (16.2). A spring positioning sleeve (14) is also fixedly provided on the lower surface of the oil tank cover (13). An oil pressure spring (11) is connected between the spring positioning sleeve (14) and the oil pressure piston (9.2).

6. The self-venting sump for a multipoint electrically powered grease pump of claim 4, wherein: An exhaust valve seat (15) is also fixedly provided on the oil tank cover (13). The one-way exhaust valve (16) is fixedly installed on the exhaust valve seat (15). The upper part of the guide exhaust rod (12) passes through the exhaust valve seat (15) and communicates with the one-way exhaust valve (16). The one-way exhaust valve (16) includes an exhaust valve body (16.4), an exhaust valve core (16.3) located in the exhaust valve body (16.4) to control the air discharge, an adjusting screw (16.1) installed in the exhaust valve body (16.4), and an exhaust valve spring (16.2). A spring positioning sleeve (14) is also fixedly provided on the lower surface of the oil tank cover (13). An oil pressure spring (11) is connected between the spring positioning sleeve (14) and the oil pressure piston (9.2).

7. The self-venting sump of a multipoint electrically driven grease pump according to claim 1 or 2 or 3 or 6, characterized in that: An oil seal (9.1) is provided between the oil pressure piston (9.2) and the guide exhaust rod (12). A magnetic ring (9.4) is embedded on the outer wall of the oil pressure piston (9.2). A magnetic switch (1) is fixedly provided on the base (3). The magnetic switch (1) is connected and cooperates with the magnetic ring (9.4) and senses the electromagnetic signal emitted by the magnetic ring (9.4) to provide an early warning when the oil level is low.

8. The self-venting sump for a multipoint electrically powered grease pump of claim 4, wherein: An oil seal (9.1) is provided between the oil pressure piston (9.2) and the guide exhaust rod (12). A magnetic ring (9.4) is embedded on the outer wall of the oil pressure piston (9.2). A magnetic switch (1) is fixedly provided on the base (3). The magnetic switch (1) is connected and cooperates with the magnetic ring (9.4) and senses the electromagnetic signal emitted by the magnetic ring (9.4) to provide an early warning when the oil level is low.

9. The self-venting sump for a multipoint electrically powered grease pump of claim 5, wherein: An oil seal (9.1) is provided between the oil pressure piston (9.2) and the guide exhaust rod (12). A magnetic ring (9.4) is embedded on the outer wall of the oil pressure piston (9.2). A magnetic switch (1) is fixedly provided on the base (3). The magnetic switch (1) is connected and cooperates with the magnetic ring (9.4) and senses the electromagnetic signal emitted by the magnetic ring (9.4) to provide an early warning when the oil level is low.

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