A fuel dispenser

Abstract

The utility model relates to a kind of oiling machines. The oiling machine includes oil cylinder, plunger pump and motor, plunger pump has pump base, at least one oiling pipeline is equipped on pump base, each oiling pipeline includes oil storage cavity, plunger sleeve is equipped in oil storage cavity, oil inlet is equipped on plunger sleeve, plunger is equipped in oil inlet. Ball and spring are equipped in oil outlet, which is equipped on pump base. Rotatingly provided with rotating wheel on pump base, eccentric installation column is provided on rotating wheel, top pressure wheel is provided on installation column, ring sleeve is slidably fitted on the outside of top pressure wheel, the inside of ring sleeve has ring groove, installation hole is provided on the sidewall of ring sleeve, and installation hole is long hole, the end of plunger in ring sleeve has limit protrusion. Top pressure wheel can press plunger to pump oil in oil inlet during the rotation of rotating wheel, and oil suction in oil inlet is carried out by pulling plunger reset through ring sleeve. The structure is very simple, and the plunger on multiple oiling pipelines can be pressed and reset simultaneously, which is simple in structure and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of lubrication technology, specifically to a refueling machine. Background Technology

[0002] Many large pieces of equipment require lubrication during operation. For example, bearing housings and bushings are equipped with grease filling ports. Traditionally, grease is injected manually using a grease gun. However, these components require a relatively large amount of grease to function properly, necessitating frequent replenishment. Therefore, grease filling machines have emerged to address this need.

[0003] Existing fuel dispensers generally consist of an upper fuel tank and a lower fuel injection assembly. The fuel tank has an inlet at the bottom. The fuel injection assembly includes a motor and a plunger pump. The motor drives an eccentric wheel. The plunger pump includes a pump base with a reservoir connected to the inlet and an oil passage connected to the reservoir. The oil passage has an outlet. A plunger, steel balls, and springs are located within the oil passage. The rotation of the eccentric wheel drives the plunger to reciprocate within the oil passage, pumping out the lubricating grease. In existing fuel dispensers, the plunger's reciprocating motion mostly relies on the spring force for return. However, the short fatigue life of springs leads to a high failure rate in fuel dispensers. Utility Model Content

[0004] The purpose of this utility model is to provide a refueling machine to solve the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a refueling machine with the following technical solution: A refueling machine includes an oil cylinder, a plunger pump, and a motor. The plunger pump has a pump base located at the bottom of the oil cylinder. At least one refueling pipeline is provided on the pump base. Each refueling pipeline includes an oil storage chamber with an upward-facing opening for grease from the oil cylinder to enter. A plunger sleeve is provided in the oil storage chamber, and an oil inlet passage communicating with the oil storage chamber is provided on the plunger sleeve. A plunger is provided in the oil inlet passage. The pump base also has an oil outlet passage communicating with each oil storage chamber, and a ball bearing and a spring are provided in the oil outlet passage. A motor-driven impeller is rotatably mounted on the pump base. An eccentric mounting post is provided, on which a pressure roller is mounted. The pressure roller presses against the plunger as the rotating wheel rotates. A ring sleeve is circumferentially fitted on the outer side of the pressure roller. The inner side of the ring sleeve has an annular groove. The side wall of the ring sleeve has a mounting hole that communicates with the annular groove for inserting one end of the plunger. The mounting hole is an elongated hole that extends along the circumferential direction of the ring sleeve. The end of the plunger located in the ring sleeve has a limiting protrusion that is used to limit and stop the movement with the bottom of the annular groove. As the pressure roller rotates with the rotating wheel, it can press against the plunger to pump oil into the oil inlet passage, and the ring sleeve pulls the plunger back to its original position to draw oil into the oil inlet passage.

[0006] The number of refueling pipelines is two or more, and they are evenly spaced along the circumferential direction of the pump base.

[0007] The pump base has a mounting cavity at its center for mounting and moving the pressure roller and the ring sleeve.

[0008] A filter plate is installed at the opening of the oil storage chamber.

[0009] The upper end of the mounting post extends upward into the oil cylinder, and a stirring rod is provided on the mounting post so that the stirring rod presses the lubricating grease into the oil storage chamber as the rotating wheel rotates.

[0010] The stirring rod is a long strip plate, and both ends of the long strip plate have upwardly inclined concave cavities for allowing grease to enter and pressing the grease downwards.

[0011] The upper end of the oil cylinder is provided with an oil cylinder cover, and the oil cylinder cover is provided with a stirring structure for stirring the grease to allow air bubbles in the grease to escape.

[0012] The stirring structure is rotatably mounted on the cylinder cover with a stirring shaft. The stirring shaft is provided with at least one layer of stirring blades, and each layer of stirring blades includes at least two stirring blades arranged evenly in the circumferential direction.

[0013] Each of the stirring blades is inclined at the same angle on the stirring shaft.

[0014] The oil drum is equipped with a support frame, which includes a positioning flange. The positioning flange has radially arranged support arms for contacting the pump base below. The lower end of the stirring shaft is rotatably mounted on the positioning flange.

[0015] The beneficial effects of this utility model are as follows: This utility model uses a motor-driven rotating wheel with an eccentrically mounted mounting column. The mounting column drives a pressure roller and a ring sleeve to rotate eccentrically relative to the rotating wheel. During rotation, the pressure roller repeatedly presses against the plunger, pumping the grease out of the oil inlet channel. When the pressure roller passes the plunger and stops pressing it, the ring sleeve pulls the plunger back, creating a vacuum in the oil inlet channel and drawing the grease from the oil reservoir into the channel. The pressure roller then presses against the plunger again to pump oil. This structure uses a mechanical hook-and-pull mechanism between the ring sleeve and the plunger to return the plunger to its original position, replacing the spring and significantly reducing the high failure rate of fuel dispensers caused by the short fatigue life of springs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of a refueling machine according to the present invention; Figure 2 yes Figure 1 Internal structure diagram; Figure 3 yes Figure 2A magnified view of a section at point A in the middle; Figure 4 yes Figure 3 A magnified view of a section at point B in the middle; Figure 5 yes Figure 1 Schematic diagram of the structure after removing the oil cylinder and outer shell Figure 6 yes Figure 1 Schematic diagram of a plunger pump; Figure 7 yes Figure 6 A schematic diagram of the structure without the pump base. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0018] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The use of "belonging" in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this invention.

[0019] An embodiment of this utility model of a fuel dispenser, such as... Figures 1-6 As shown, the device includes a housing 1, a plunger pump, and a motor 11. The housing 1 has an internal partition 1A that divides the inner cavity of the housing into an oil cylinder 1B and a mounting cylinder 1C. The oil cylinder holds lubricating grease. The plunger pump and motor are housed within the mounting cylinder, and an oil outlet 6 is provided on the side wall of the mounting cylinder. The plunger pump has a pump base 14 located at the bottom of the oil cylinder, and the partition allows the pump base 14 to be connected and installed.

[0020] The upper end of the oil cylinder 1B is equipped with an oil cylinder cover 2, which has a stirring structure for stirring the grease to release air bubbles. The oil cylinder cover and the oil cylinder can be connected by a snap-fit, threaded connection, or screw connection for easy installation and disassembly. In this embodiment, the stirring structure is rotatably mounted on a stirring shaft 9 on the cylinder cover. The stirring shaft has three layers of stirring blades, each layer of stirring blades including three stirring blades 10 evenly spaced circumferentially. Each stirring blade is inclined on the stirring shaft at the same angle, for example, the angle between the plane of each stirring blade and the circumferential direction of the stirring shaft is 45°. The oil cylinder cover 2 has a motor cavity 7, in which a drive motor 8 is installed. The motor shaft of the drive motor is connected to the stirring shaft to enable the drive motor to drive the rotation of the stirring shaft. The upper end of the motor cavity is equipped with a motor cavity cover for easy maintenance of the drive motor. The oil cylinder cover 2 also has a feeding port with a movable cover 4, through which grease can be added. A support frame 34 is installed inside the oil drum. The support frame 34 includes a positioning flange 28. Support arms 29 are radially arranged on the positioning flange for contacting the pump base below. In this embodiment, there are three support arms. The lower end of the stirring shaft can be rotatably mounted on the positioning flange 28 via a bearing. The support arms can also contact both the pump base and the inner wall of the oil drum simultaneously.

[0021] At least one refueling line is provided on the pump base 14. In this embodiment, there are four refueling lines with the same structure. The following describes one of the refueling lines in detail: The refueling line includes an oil reservoir 18 on the pump base 14 with an upward-facing opening for grease from the oil cylinder to enter. A plunger sleeve 25 is embedded in the oil reservoir 18. The plunger sleeve 25 is provided with an oil inlet channel 19 communicating with the oil reservoir 18. Specifically, the plunger sleeve 25 is provided with an oil hole 2 to allow grease from the oil reservoir 18 to enter the oil inlet channel 19. A plunger 22 is provided in the oil inlet channel 19. The pump base is also provided with an oil outlet channel 21 communicating with each oil reservoir. A ball bearing 23 and a spring 24 are provided in the oil outlet channel 21. The ball bearing can block the oil outlet channel under the action of the spring, forming a one-way valve.

[0022] A rotating wheel 12 driven by a motor 11 is rotatably mounted on the pump base 14. In this embodiment, a bracket 36 is provided on the pump base, and the rotating wheel is rotatably mounted on the bracket. The motor drives the rotating wheel to rotate through a reduction gear set. The reduction gear set is existing technology and will not be described in detail in this embodiment. An eccentric mounting post 13 is provided on the rotating wheel 12, and a top pressure wheel 17 is provided on the mounting post 13. The top pressure wheel 17 is used to press the plunger 22 during the rotation of the rotating wheel. A ring sleeve 30 is circumferentially sliding (i.e., rotating) on ​​the outer side of the top pressure wheel 17. The inner side of the ring sleeve 300 has an annular groove 31. The side wall of the ring sleeve is provided with a mounting hole 32 communicating with the annular groove for inserting one end of the plunger. The mounting hole is an elongated hole extending along the circumferential direction of the ring sleeve. The end of the plunger located in the ring sleeve has a limiting protrusion 33, which is used to limit and stop with the bottom of the annular groove 31. The limiting protrusion is integrally formed with the plunger. As the top pressure wheel 17 rotates with the rotating wheel 12, it can press the plunger 22 to pump oil in the oil inlet channel, and pull the plunger 22 back to its original position through the ring sleeve 30 to draw oil in the oil inlet channel.

[0023] In this embodiment, the partition has a central hole to avoid the oil storage chamber 18 on the pump base. To prevent impurities from entering the oil storage chamber, a filter plate 26 is provided at the upper opening of each oil storage chamber. In this embodiment, there are four refueling lines, evenly spaced along the circumferential direction of the pump base. The pump base 14 has a mounting cavity 27 at its center for mounting and moving the top pressure wheel and the ring sleeve. This arrangement allows the plungers of the four refueling lines to be arranged radially on the outside of the mounting cavity, enabling the top pressure wheel to work on the four refueling lines during its stroke, which is suitable for multi-line refueling machines. The oil outlets of the four refueling lines are connected to oil outlet pipes, and each oil outlet pipe is connected to an oil injection pipe 35, which is connected to the oil outlet 6 on the outer casing.

[0024] The upper end of the mounting column 13 extends upward into the oil cylinder, and a stirring rod 15 is provided on the mounting column. The stirring rod moves synchronously with the mounting column so that the stirring rod presses the grease into the oil storage chamber as the rotating wheel rotates. In this embodiment, the stirring rod 15 is a long strip plate, and both ends of the long strip plate have upwardly inclined concave cavities 16 for allowing the grease to enter and pressing the entered grease downward.

[0025] In operation, the motor drives the rotating wheel to rotate, which in turn generates eccentric motion of the mounting pin, pressure roller, ring sleeve, and agitator. During rotation, the pressure roller presses back and forth against the corresponding plunger, squeezing the grease in the oil passage. The grease pushes aside the balls and springs, allowing the grease in each oil passage to be pumped out. Once the pressure roller passes the plunger and stops pressing it, the balls, under the action of the spring, block the oil passage. The pressure roller continues to rotate, pulling the plunger back to its original position through the mounting hole on the ring sleeve, creating a vacuum in the oil passage. This draws the grease from the reservoir into the oil passage. The pumping action repeats when the pressure roller presses the plunger again.

[0026] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0028] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0029] In other embodiments of this utility model, the number of refueling pipelines can be adjusted according to actual needs, such as 1, 2, 3, 5 or more; the number of layers of stirring blades can also be adjusted according to actual needs, such as 1 layer; the number of stirring blades in each layer can also be adjusted according to actual needs, such as 2; the angle of each stirring blade can also be adjusted according to actual needs, such as 90° or 30°; the outer shell can also only include an oil cylinder, in which case the oil cylinder has a bottom that is equivalent to a partition, without a mounting cylinder.

Claims

1. A refueling machine, comprising an oil cylinder, a plunger pump, and a motor, wherein the plunger pump has a pump base disposed at the bottom of the oil cylinder, and at least one refueling pipeline is disposed on the pump base, each refueling pipeline including an oil storage chamber with an upward-facing opening for grease from the oil cylinder to enter, a plunger sleeve disposed in the oil storage chamber, an oil inlet passage disposed on the plunger sleeve communicating with the oil storage chamber, a plunger disposed in the oil inlet passage, and an oil outlet passage disposed on the pump base communicating with each oil storage chamber, wherein a ball and a spring are disposed in the oil outlet passage; characterized in that: A motor-driven impeller is rotatably mounted on the pump base. An eccentric mounting post is mounted on the impeller, and a pressure roller is mounted on the mounting post. The pressure roller presses against the plunger as the impeller rotates. A ring sleeve is circumferentially fitted on the outer side of the pressure roller. The inner side of the ring sleeve has an annular groove. The side wall of the ring sleeve has a mounting hole communicating with the annular groove for inserting one end of the plunger. The mounting hole is an elongated hole extending along the circumferential direction of the ring sleeve. The end of the plunger located in the ring sleeve has a limiting protrusion, which is used to limit and stop the movement of the groove bottom. As the pressure roller rotates with the impeller, it can press against the plunger to pump oil into the oil inlet passage, and the ring sleeve pulls the plunger back to its original position to draw oil into the oil inlet passage.

2. The fuel dispenser according to claim 1, characterized in that: The number of refueling pipelines is two or more, and they are evenly spaced along the circumferential direction of the pump base.

3. The refueling machine according to claim 2, characterized in that: The pump base has a mounting cavity at its center for mounting and moving the pressure roller and the ring sleeve.

4. The fuel dispenser according to claim 1, characterized in that: A filter plate is installed at the opening of the oil storage chamber.

5. The fuel dispenser according to claim 1, characterized in that: The upper end of the mounting post extends upward into the oil cylinder, and a stirring rod is provided on the mounting post so that the stirring rod presses the lubricating grease into the oil storage chamber as the rotating wheel rotates.

6. The fuel dispenser according to claim 5, characterized in that: The stirring rod is a long strip plate, and both ends of the long strip plate have upwardly inclined concave cavities for allowing grease to enter and pressing the grease downwards.

7. The fuel dispenser according to any one of claims 1-6, characterized in that: The upper end of the oil cylinder is provided with an oil cylinder cover, and the oil cylinder cover is provided with a stirring structure for stirring the grease to allow air bubbles in the grease to escape.

8. The fuel dispenser according to claim 7, characterized in that: The stirring structure is rotatably mounted on the cylinder cover with a stirring shaft. The stirring shaft is provided with at least one layer of stirring blades, and each layer of stirring blades includes at least two stirring blades arranged evenly in the circumferential direction.

9. The fuel dispenser according to claim 8, characterized in that: Each of the stirring blades is inclined at the same angle on the stirring shaft.

10. The fuel dispenser according to claim 8, characterized in that: The oil drum is equipped with a support frame, which includes a positioning flange. The positioning flange has radially arranged support arms for contacting the pump base below. The lower end of the stirring shaft is rotatably mounted on the positioning flange.

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