Fluid pump and warp knitting machine lubricating device

Abstract

The application discloses a kind of fluid pumps, including base, piston cylinder and rotating disc, the mounting slot is opened in the base, the oil inlet hole and oil outlet hole are opened in the base;The piston cylinder includes cylinder body, the bottom of the cylinder body has connector, the cylinder body has chamber, the piston rod is projected in the chamber;The free end of the piston rod is eccentrically articulated with the rotating disc by first pin shaft, the connector is located in the mounting slot, and is matched with the mounting slot, the connector is articulated with the base by second pin shaft.The fluid pump and warp knitting machine lubricating device of the application, under the rotation of the rotating disc, the piston cylinder can be driven by the rotating disc to swing, at the same time, it can be extended and contracted and pumped, in the process of the piston cylinder extension and contraction and pumping, the phase angle change of the cylinder body relative to the base is used to automatically complete the one-way control of fluid flow direction, which is simpler in structure, lower in installation precision requirement, cost and service life.

Description

Technical Field

[0001] This invention relates to the field of fluid transport equipment technology, and in particular to a fluid pump and a lubrication device for a warp knitting machine. Background Technology

[0002] A fluid pump is a device used to transport fluids. When transporting different media, such as water, it is often called a water pump; when transporting oil, it is often called an oil pump. Although water pumps and oil pumps transport different media and have different focuses in their manufacturing, such as different corrosion resistance, high pressure resistance, and wear resistance, they are both fluids. They not only have commonalities in structure, but some fluid pumps can even be used interchangeably, that is, they can be used as both water pumps and oil pumps.

[0003] Currently, fluid pumps on the market come in various structures, the most common being gear pumps, rotary pumps, and piston pumps. Gear pumps consist of two meshing gears. The precision of the gear engagement is a prerequisite for pumping fluid. To generate the pressure needed for pumping, gear pumps typically require high meshing precision. However, this high precision also accelerates gear wear, resulting in a generally shorter service life for gear pumps. Rotary pumps are similar to gear pumps, using a set of gears in the transmission chamber. While they don't directly cause active or passive wear, their precision requirements are higher than gear pumps, leading to higher costs and larger size. Piston pumps are essentially piston structures. To ensure unidirectional operation, they typically include a check valve assembly, making the overall structure relatively complex and costly. Summary of the Invention

[0004] One objective of this invention is to provide a fluid pump.

[0005] The technical solution to achieve the first objective of this invention is: a fluid pump, comprising a base, a piston cylinder, and a turntable. The base has an installation groove with a circular arc cross-section for the groove wall. The base also has an oil inlet and an oil outlet, located on opposite sides of the installation groove and communicating with it. The piston cylinder comprises a cylinder body and a piston rod. The bottom of the cylinder body has a connector with a circular arc cross-section for its peripheral wall. The cylinder body has a chamber that extends from both the top and bottom, and the piston rod extends from this chamber.

[0006] The free end of the piston rod is hinged to the turntable via a first pin. The first pin is not coaxial with the turntable. The connector is located in the mounting groove and fits the mounting groove in an arc shape. The connector is hinged to the base via a second pin. The center of the arc-shaped peripheral wall of the connector is located on the axis of the second pin. The first pin, the second pin and the central axis of the turntable are parallel.

[0007] There is a gap between the bottom of the connector and the bottom of the mounting groove. The center line connecting the turntable and the second pin is a straight line L. When the first pin is not on the straight line L and its extension and is gradually moving away from the second pin at any position, the oil inlet is connected to the chamber, and the oil outlet is not connected to the chamber due to the obstruction of the connector. When the first pin is not on the straight line L and is gradually moving closer to the second pin at any position, the oil inlet is not connected to the chamber due to the obstruction of the connector, and the oil outlet is connected to the chamber.

[0008] Furthermore, the chamber includes a piston assembly fixedly mounted on the piston rod. The piston assembly is in contact with the chamber wall, and an arc-shaped notch is formed on the bottom surface of the piston assembly facing the second pin. The arc-shaped notch on the bottom surface of the piston assembly is provided to allow for clearance of the second pin, so that the stroke of the piston assembly can be greater after clearance of the second pin.

[0009] Furthermore, the surface of the mounting groove wall is cylindrical, and the surface of the peripheral wall of the connector is cylindrical. The mounting groove, with its arc-shaped cross-section, can have a cylindrical or spherical surface. Compared to a spherical surface, the cylindrical structure of the mounting groove limits the rotation of the connector, ensuring that the connector can only rotate on a single plane and cannot form a universal joint for free rotation. This design also makes the positional relationship between the oil inlet, the oil outlet, and the chamber more stable.

[0010] Furthermore, the piston rod is vertically positioned. When the piston rod is vertically positioned, the rotation of the turntable causes the cylinder to swing, and the piston rod to extend and retract, resulting in more even force distribution on both sides of the turntable.

[0011] The second objective of this invention is to provide a lubrication device for a warp knitting machine.

[0012] The technical solution to achieve the second objective of this invention is: a lubrication device for a warp knitting machine, comprising a fluid pump, an oil tank, and a warp knitting machine spindle extending into the oil tank as described in the first objective of this invention. The fluid pump is located inside the oil tank, and the turntable of the fluid pump is coaxially mounted on the warp knitting machine spindle. The base of the fluid pump is fixedly mounted on the oil tank, and the oil tank is provided with an oil outlet pipe. The oil outlet of the fluid pump is connected to the oil outlet pipe.

[0013] Furthermore, the connector is also provided with a second oil inlet hole, which communicates with the chamber. When the first pin is not on the straight line L and the first pin is gradually moving away from the second pin, the second oil inlet hole is located outside the mounting groove; when the first pin is not on the straight line L and the first pin is gradually moving closer to the second pin, the second oil inlet hole is located inside the mounting groove. During operation, as the turntable rotates and the cylinder body swings, and the piston rod and piston assembly gradually move away from the second pin, the second oil inlet is located outside the mounting groove and communicates with the oil tank. Lubricating oil in the oil tank is simultaneously drawn into the chamber through both the first and second oil inlets. Conversely, as the turntable rotates and the cylinder body swings, and the piston rod and piston assembly gradually approach the second pin, the second oil inlet is located inside the mounting groove and not communicated with the oil tank. The oil inlet is also not communicated with the chamber due to obstruction by the connector. The oil outlet communicates with the connector, and the lubricating oil in the chamber is forced out of the chamber through the oil outlet and then sent out through the oil outlet pipe. The design of the second oil inlet in this invention allows for dual-hole oil intake (both the first and second oil inlets) when oil is introduced into the chamber. This increases the inlet diameter, increases the oil intake per unit time, improves the ease of oil intake, and avoids the problem of excessively small inlet diameter and difficulty in oil intake.

[0014] Furthermore, the base of the fluid pump is fixedly installed at the bottom of the oil tank.

[0015] The present invention relates to a fluid pump and a lubrication device for a warp knitting machine. By creating an installation groove with an arc-shaped cross-section on the base, and simultaneously having a connector with an arc-shaped cross-section on the peripheral wall of the piston cylinder, the connector and the installation groove can be fitted together to form a rotatable joint structure. This provides conditions for the piston cylinder to swing. After the piston rod is eccentrically hinged to the turntable, the turntable can provide power to the piston cylinder. Thus, under the rotation of the turntable, the piston cylinder can be driven by the turntable, achieving extension, contraction, and pumping pressure. After the piston cylinder extends and retracts and pumps pressure, an oil inlet and an oil outlet are provided on the base. By utilizing the swing of the cylinder relative to the base and the change in the phase angle of the cylinder relative to the base, the connector acts as a valve for the oil inlet and the oil outlet, controlling their opening and closing. In this way, during the extension, retraction, and pumping of the piston cylinder, unidirectional control of the fluid flow can be automatically achieved without the need for additional one-way valves or other structures. Its structure is simpler, and compared to high-precision, easily worn meshing, it has lower installation accuracy requirements, lower costs, and a longer service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first operating state of the fluid pump and warp knitting machine lubrication device of the present invention;

[0017] Figure 2 This is a schematic diagram of the second operating state of the fluid pump and warp knitting machine lubrication device of the present invention;

[0018] Figure 3 This is a schematic diagram of the third operating state of the fluid pump and warp knitting machine lubrication device of the present invention;

[0019] Figure 4 This is a schematic diagram of the fourth operating state of the fluid pump and warp knitting machine lubrication device of the present invention;

[0020] Figure 5 This is a schematic diagram of the cylinder body of the fluid pump and warp knitting machine lubrication device of the present invention. Implementation

[0021] The specific embodiments of the fluid pump and warp knitting machine lubrication device of the present invention will be described in detail below with reference to the accompanying drawings:

[0022] like Figures 1 to 4 As shown, a fluid pump includes a base 1, a piston cylinder 2, and a turntable 3. The base 1 has a mounting groove 11, the groove wall 110 of which has an arc-shaped cross-section. The base 1 has an oil inlet 12 and an oil outlet 13, which are located on both sides of the mounting groove 11 and are connected to it. The piston cylinder 2 includes a cylinder body 21 and a piston rod 22. The bottom of the cylinder body 21 has a connector 211, the peripheral wall 2110 of which has an arc-shaped cross-section. The cylinder body 21 has a chamber 212 that extends through both ends, and the piston rod 22 extends out from the chamber 212.

[0023] The free end of the piston rod 22 is hinged to the turntable 3 via a first pin 221. The first pin 221 is not coaxial with the turntable 3. The connector 211 is located in the mounting groove 11 and fits the mounting groove 11 in an arc shape. The connector 211 is hinged to the base 1 via a second pin 2111. The center P of the circle containing the arc-shaped peripheral wall 2110 of the connector 211 is located on the axis of the second pin 2111. The first pin 221, the second pin 2111 and the central axis of the turntable 3 are parallel.

[0024] There is a gap between the bottom of the connector 211 and the bottom of the mounting groove 11. The center line connecting the turntable 3 and the second pin 2111 is a straight line L. When the first pin 221 is not on the straight line L and its extension and the first pin 221 gradually moves away from the second pin 2111 at any position, the oil inlet 12 is connected to the chamber 212, and the oil outlet 13 is not connected to the chamber 212 due to the obstruction of the connector 211. When the first pin 221 is not on the straight line L and the first pin 221 gradually moves closer to the second pin 2111 at any position, the oil inlet 12 is not connected to the chamber 212 due to the obstruction of the connector 211, and the oil outlet 13 is connected to the chamber 212.

[0025] The fluid pump of the present invention includes a base 1 for mounting the cylinder body 21 of the piston cylinder 2; wherein the cross-section of the groove wall 110 of the mounting groove 11 is arc-shaped, and the cross-section of the peripheral wall 2110 of the connector 211 is arc-shaped. The mounting groove 11 is used to accommodate the connector 211 and cooperate with the connector 211 to provide conditions for relative swinging of the connector 211.

[0026] The present invention relates to a fluid pump, wherein the piston cylinder 2 is used to pump liquid, so that the liquid is pumped into the chamber 212 through the oil inlet 12 and then pumped out of the chamber 212 through the oil outlet 13; wherein, the connector 211 at the bottom of the cylinder body 21 is used to cooperate with the mounting groove 11, and after cooperating with the mounting groove 11, the connector 211 and the mounting groove 11 form a joint, which can swing relative to each other; the top and bottom of the chamber 212 are both open, and the open ends of the chamber 212 facilitate communication with the oil inlet 12 and the oil outlet 13, thereby realizing liquid inlet and outlet. The piston rod 22 extends free of the cylinder body 21 and is eccentrically hinged to the turntable 3 via a first pin 221. Under the eccentric hinge, the turntable 3 can drive the piston cylinder 2. The connector 211 is hinged to the base 1 via a second pin 2111. The center P of the spherical surface on which the peripheral wall of the connector 211 is located is on the axis of the second pin 2111. This arrangement is used to provide a fulcrum for the swing of the cylinder body 21, so that the cylinder body 21 swings with the second pin 2111 as the swing center. There is a gap between the bottom of the connector 211 and the bottom of the mounting groove 11, which provides space for the swing of the cylinder body 21.

[0027] In the fluid pump of the present invention, the rotary table 3 is used to provide power for the movement of the piston cylinder 2.

[0028] In the fluid pump of the present invention, the turntable 3 rotates, and the rotating turntable 3 can drive the piston cylinder 2, so that the cylinder body 21 of the piston cylinder 2 swings around the second pin 2111 as the swing center, while the piston rod 22 extends and retracts, and the piston assembly 23 performs piston movement in the chamber 212.

[0029] In the fluid pump of the present invention, when the cylinder body 21 of the piston cylinder 2 swings around the second pin 2111 as the swing center, the phase of the cylinder body 21 relative to the base 1 changes. Correspondingly, the communication relationship between the oil inlet 12 and the chamber 212, and between the oil outlet 13 and the chamber 212 also changes. That is to say, the cylinder body 21 and the base 1 form a "switch", and what controls the "switch" is the phase of the cylinder body 21 relative to the base 1, that is, the swing of the cylinder body 21 of the piston cylinder 2. The specific control relationship between the swing of the cylinder 21 and the "switch" is as follows: as the cylinder 21 swings, the bottom of the connector 211, the bottom of the oil inlet 12 port, and the bottom of the oil outlet 13 port are all flush with the first pin 221 on the straight line L. The oil inlet 12 and the oil outlet 13 are not connected to the chamber 212 due to the obstruction of the connector 211; that is, the oil inlet 12 and the oil outlet 13 are both "closed". "Closed"; the first pin 221 is not in a position on the straight line L, the oil inlet 12 is in communication with the chamber 212, and the oil outlet 13 is not in communication with the chamber 212 due to the obstruction of the connector 211, or the oil inlet 12 is not in communication with the chamber 212 due to the obstruction of the connector 211, and the oil outlet 13 is in communication with the chamber 212, that is, one of the oil inlet 12 and the oil outlet 13 is "open" and the other is "closed".

[0030] In this fluid pump, driven by the turntable 3, the piston rod 22 extends and retracts, causing piston movement within the chamber 212. This pressure change within the chamber 212 creates a pressure difference with the outside of the chamber, providing power for liquid inflow and outflow. When the piston rod 22 extends, the pressure within the chamber 212 decreases, creating a negative pressure relationship between the inside and outside of the chamber. Under this negative pressure, liquid outside the chamber 212 can be pumped into the chamber. Conversely, when the piston rod 22 retracts, the pressure within the chamber 212 increases, creating a positive pressure relationship between the inside and outside of the chamber. Under this positive pressure, liquid inside the chamber 212 can be pumped out of the chamber.

[0031] In this fluid pump, the cylinder body 21 of the piston cylinder 2 swings around the second pin 2111 as the swing center, the piston rod 22 extends and retracts, and the piston assembly 23 moves within the chamber 212. By controlling the rotation of the turntable 3, the opening and closing of the oil inlet 12 and the oil outlet 13 can be controlled, thereby realizing the operation of pumping liquid into the chamber 212 through the oil inlet 12 and pumping liquid out of the chamber 212 through the oil outlet 13, thus completing the fluid pumping operation.

[0032] The fluid pump of this invention operates as follows: the turntable 3 rotates, driving the piston cylinder 2. Simultaneously, the cylinder body 21 of the piston cylinder 2 oscillates around the second pin 2111 as its pivot point, while the piston rod 22 extends and retracts, causing piston movement within the chamber 212. During the movement of the piston cylinder 2, when the first pin 221 is on the straight line L, the bottom of the connector 211, the bottom of the oil inlet 12, and the bottom of the oil outlet 13 are all flush. The oil inlet 12 and the oil outlet 13 are not connected to the chamber 212 due to the obstruction of the connector 211; both are closed. Figure 1 As shown; subsequently, as the turntable 3 rotates, the first pin 221 is no longer on the straight line L, and the first pin 221 gradually moves away from the second pin 2111. The oil inlet 12 communicates with the chamber 212, and the oil inlet 12 is open. The oil outlet 13 is not communicated with the chamber 212 due to the obstruction of the connector 211, and the oil outlet 13 is closed. With the oil inlet 12 open and the oil outlet 13 closed, the first pin 221 gradually moves away from the second pin 2111, the piston rod 22 extends, the pressure inside the chamber 212 decreases, and the liquid outside the chamber 212 is pumped into the chamber 212 through the oil inlet 12, as shown. Figure 2 As shown; subsequently, as the turntable 3 rotates, the first pin 221 returns to the extension line of the straight line L, and the bottom of the connector 211, the bottom of the oil inlet 12, and the bottom of the oil outlet 13 are aligned again. The oil inlet 12 and the oil outlet 13 then close again under the obstruction of the connector 211, as shown. Figure 3As shown; then, as the turntable 3 rotates, the first pin 221 is no longer on the straight line L, and the first pin 221 gradually approaches the second pin 2111. The oil inlet 12 is not connected to the chamber 212 due to the obstruction of the connector 211, and the oil inlet 12 is closed. The oil outlet 13 is connected to the chamber 212, and the oil outlet 13 is open. With the oil inlet 12 closed and the oil outlet 13 open, the first pin 221 gradually approaches the second pin 2111, the piston rod 22 contracts, the pressure inside the chamber 212 increases, and the liquid inside the chamber 212 is pumped out of the chamber 212 through the oil outlet 13, as shown. Figure 4 As shown, as the turntable 3 rotates, the fluid pump can repeatedly and continuously pump pressure.

[0033] The fluid pump of the present invention features an installation groove 11 with an arc-shaped cross-section on the base 1, and a connecting head 211 with an arc-shaped cross-section on the peripheral wall 2110 of the piston cylinder 2. This allows the connecting head 211 with the arc-shaped cross-section of the peripheral wall 2110 to engage with the installation groove 11, forming a rotatable joint structure. This provides conditions for the piston cylinder 2 to swing, and after the piston rod 22 is eccentrically hinged to the turntable 3, the turntable 3 can provide power to the piston cylinder 2. Thus, under the rotation of the turntable 3, the piston cylinder 2 can be driven by the turntable 3, achieving extension, contraction, and pumping pressure. After the piston cylinder 2 extends and pumps pressure, the oil inlet 12 and the oil outlet 13 are provided on the base 1. By utilizing the swing of the cylinder 21 relative to the base 1 and the change in the phase angle of the cylinder 21 relative to the base 1, the connector 211 acts as a valve for the oil inlet 12 and the oil outlet 13, controlling the opening and closing of the oil inlet 12 and the oil outlet 13. In this way, during the extension, retraction and pumping of the piston cylinder 2, the unidirectional control of the fluid flow can be automatically completed without the need for additional one-way valves or other structures. Compared with high-precision and easily worn meshing, its installation accuracy requirements, costs, and service life are also lower.

[0034] In a preferred embodiment of the fluid pump of the present invention, the chamber 212 contains a piston assembly 23, which is fixedly mounted on the piston rod 22. The piston assembly 23 is in contact with the chamber wall of the chamber 212, and an arc-shaped notch 231 is formed on the bottom surface of the piston assembly 23 facing the second pin 2111. During operation, the piston assembly 23 performs piston movement within the chamber 212. The arc-shaped notch 231 on the bottom surface of the piston assembly 23 is provided to allow for clearance of the second pin 2111, so that the stroke of the piston assembly 23 can be greater after clearance of the second pin 2111.

[0035] The fluid pump of the present invention, preferably, is as follows: Figure 5 As shown, the surface of the groove wall 110 of the mounting groove 11 is cylindrical, and the surface of the peripheral wall 2110 of the connector 211 is cylindrical. The mounting groove 11, with its arc-shaped cross-section, can have a cylindrical or spherical surface. Compared to a spherical surface, the cylindrical structure of the mounting groove 11 limits the rotation of the connector 211, allowing the connector 211 to rotate only on one plane and preventing it from forming a universal joint that can rotate freely. With this configuration, the positional relationship between the oil inlet 12, the oil outlet 13, and the chamber 212 is more stable.

[0036] The fluid pump of this invention can be used as an oil pump, a water pump, or various other fluid pumps.

[0037] In the fluid pump of the present invention, the top and bottom of the chamber 212 are both through, which can be a straight line through the top and bottom of the chamber 212, or a hole can be provided in the side wall of the connector 211, and the top and bottom of the chamber 212 can be curved through.

[0038] In the fluid pump of the present invention, when the first pin 221 is on or not on the straight line L and its extension, it generally means that the axis of the first pin 221 is on or not on the straight line L and its extension.

[0039] In the fluid pump of the present invention, preferably, the piston rod 22 is vertically arranged. When the piston rod 22 is vertically arranged, the rotating disk 3 rotates, causing the cylinder 21 to swing and the piston rod 22 to extend and retract, resulting in more even force distribution on both sides of the rotating disk 3.

[0040] The present invention also provides a lubrication device for a warp knitting machine.

[0041] like Figures 1 to 4As shown, a lubrication device for a warp knitting machine includes a fluid pump, an oil tank 20, and a warp knitting machine spindle 30 extending into the oil tank 20. The fluid pump is located inside the oil tank 20, and the turntable 3 of the fluid pump is coaxially mounted on the warp knitting machine spindle 30. The base 1 of the fluid pump is fixedly mounted on the oil tank 20. The oil tank 20 is provided with an oil outlet pipe 201, and the oil outlet hole 13 of the fluid pump is connected to the oil outlet pipe 201.

[0042] The present invention relates to a lubrication device for a warp knitting machine, wherein the fluid pump is used to pump and deliver lubricating oil; the oil tank 20 serves as a container for holding the lubricating oil; and the warp knitting machine spindle 30 serves as the power source for the turntable 3, thereby driving the turntable 3.

[0043] The present invention relates to a lubrication device for a warp knitting machine. The oil inlet 12 of the fluid pump is located below the liquid level in the oil tank 20. During operation, the turntable 3 of the fluid pump rotates with the main shaft 30 of the warp knitting machine, driving the piston cylinder 2 of the fluid pump to pump pressure. The piston cylinder 2 pumps the lubricating oil in the oil tank 20 into the piston cylinder 2 through the oil inlet 12, and then pumps it out through the oil outlet 13. The oil is then output along the oil outlet pipe 201 to the lubrication point of the warp knitting machine to lubricate the machine.

[0044] The lubrication device for a warp knitting machine of the present invention, by coaxially mounting the turntable 3 of the fluid pump on the main shaft 30 of the warp knitting machine, enables the rotating main shaft 30 of the warp knitting machine to automatically drive the turntable 3 of the fluid pump during the operation of the warp knitting machine, thereby realizing autonomous and automatic oil lubrication of the warp knitting machine during the warp knitting process.

[0045] The lubrication device for a warp knitting machine of the present invention has a fluid pump whose turntable 3 is coaxially mounted on the main shaft 30 of the warp knitting machine. Driven by the main shaft 30, it eliminates the need for a separate drive mechanism, resulting in a simple and convenient structure. Furthermore, the fluid pump, whose turntable 3 is coaxially mounted on the main shaft 30 of the warp knitting machine, operates synchronously with the warp knitting machine. In other words, during the operation of the warp knitting machine, the fluid pump can simultaneously supply oil for lubrication, ensuring smooth operation of the machine at all times and preventing the machine from being affected by insufficient lubrication.

[0046] In addition, in the lubrication device of the warp knitting machine of the present invention, the fluid pump is located in the oil tank 20. Under the action of the lubricating oil in the oil tank 20, the fluid pump itself has low friction and wear, which can greatly extend the service life of the fluid pump.

[0047] In the lubrication device for a warp knitting machine of the present invention, preferably, the connector 211 is further provided with a second oil inlet hole 121, the second oil inlet hole 121 communicating with the chamber 212, the second oil inlet hole 121 being located outside the mounting groove 11 when the first pin 221 is not on the straight line L and the first pin 221 is gradually moving away from the second pin 2111; or the second oil inlet hole 121 being located inside the mounting groove 11 when the first pin 221 is not on the straight line L and the first pin 221 is gradually moving closer to the second pin 2111.

[0048] The lubrication device for a warp knitting machine of the present invention, during operation, involves the turntable 3 rotating and the cylinder 21 oscillating. As the piston rod 22 and the piston assembly 23 gradually move away from the second pin 2111, the second oil inlet 121 is located outside the mounting groove 11 and communicates with the oil tank 20. Simultaneously, lubricating oil in the oil tank 20 is drawn into the chamber 212 through both the oil inlet 12 and the second oil inlet 121. The rotation of the turntable 3 and the oscillation of the cylinder 21... As the piston rod 22 and the piston assembly 23 gradually approach the second pin 2111, the second oil inlet 121 is located within the mounting groove 11 and is not connected to the oil tank 20. The oil inlet 12 is not connected to the chamber 212 due to the obstruction of the connector 211. The oil outlet 13 is connected to the connector 211. The lubricating oil in the chamber 212 is forced out of the chamber 212 through the oil outlet 13 and then sent out through the oil outlet pipe 201. The arrangement of the second oil inlet 121 in this invention allows for dual-hole oil intake (both the oil inlet 12 and the second oil inlet 121) when oil is introduced into the chamber 212. This increases the inlet diameter, increases the oil intake per unit time, improves the ease of oil intake, and avoids the problem of excessively small inlet diameter and difficulty in oil intake.

[0049] In the lubrication device for a warp knitting machine of the present invention, preferably, the base 1 of the fluid pump is fixedly installed at the bottom of the oil tank 20.

[0050] The fluid pump of this invention can pump oil, water, or other media; it can be used in the lubrication device of a warp knitting machine, or in other structures that pump oil or water.

[0051] For those skilled in the art, without departing from the concept of this invention, several simple deductions or substitutions can be made, and all such deductions or substitutions should be considered to fall within the scope of protection of this invention.

Claims

1. A fluid pump, characterized in that: The device includes a base, a piston cylinder, and a turntable. The base has a mounting groove with a circular arc cross-section for the groove wall. The base also has an oil inlet and an oil outlet, located on opposite sides of the mounting groove and communicating with it. The piston cylinder includes a cylinder body and a piston rod. The bottom of the cylinder body has a connector with a circular arc cross-section for its peripheral wall. The cylinder body has a chamber that extends through both the top and bottom, and the piston rod extends from this chamber. The free end of the piston rod is hinged to the turntable via a first pin. The first pin is not coaxial with the turntable. The connector is located in the mounting groove and fits the mounting groove in an arc shape. The connector is hinged to the base via a second pin. The center of the arc-shaped peripheral wall of the connector is located on the axis of the second pin. The first pin, the second pin and the central axis of the turntable are parallel. There is a gap between the bottom of the connector and the bottom of the mounting groove. The center line connecting the turntable and the second pin is a straight line L. When the first pin is not on the straight line L and its extension and is gradually moving away from the second pin at any position, the oil inlet is connected to the chamber, and the oil outlet is not connected to the chamber due to the obstruction of the connector. When the first pin is not on the straight line L and is gradually moving closer to the second pin at any position, the oil inlet is not connected to the chamber due to the obstruction of the connector, and the oil outlet is connected to the chamber.

2. The fluid pump according to claim 1, characterized in that: The chamber contains a piston assembly, which is fixedly mounted on the piston rod. The piston assembly is in contact with the chamber wall, and an arc-shaped notch is provided on the bottom surface of the piston assembly facing the second pin.

3. The fluid pump according to claim 1, characterized in that: The surface of the groove wall of the mounting slot is cylindrical, and the surface of the peripheral wall of the connector is cylindrical.

4. The fluid pump according to claim 1, characterized in that: The piston rod is set vertically.

5. A lubrication device for a warp knitting machine, comprising a fluid pump as described in any one of claims 1 to 4, an oil tank, and a warp knitting machine spindle extending into the oil tank, wherein the fluid pump is located inside the oil tank, the turntable of the fluid pump is coaxially mounted on the warp knitting machine spindle, the base of the fluid pump is fixedly mounted on the oil tank, the oil tank is provided with an oil outlet pipe, and the oil outlet of the fluid pump is connected to the oil outlet pipe.

6. The lubrication device for a warp knitting machine according to claim 5, characterized in that: The connector is also provided with a second oil inlet hole, which communicates with the chamber. When the first pin is not on the straight line L and the first pin is gradually moving away from the second pin, the second oil inlet hole is located outside the mounting groove; when the first pin is not on the straight line L and the first pin is gradually moving closer to the second pin, the second oil inlet hole is located inside the mounting groove.

7. The lubrication device for a warp knitting machine according to claim 5, characterized in that: The base of the fluid pump is fixedly installed at the bottom of the oil tank.

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