A new electric plunger lubricating pump low oil level detection device

Abstract

This utility model relates to the field of lubrication pump technology, and in particular to a novel low oil level detection device for an electric plunger lubrication pump. It includes a pump base assembly, a solenoid valve assembly, a motor controller assembly, and an oil tank assembly. The oil tank assembly is mounted on one upper end of the pump base assembly, the motor controller assembly is mounted on the other upper end, and the solenoid valve assembly is mounted on one lower end. A microswitch push rod is mounted inside the pump base assembly, and a microswitch is mounted below the microswitch push rod, with the microswitch installed at the bottom of the pump base assembly. In this utility model, the microswitch is installed at the bottom of the pump base, effectively reducing the overall height of the device, saving installation space, and improving the compactness of the entire unit. The bottom arrangement avoids the risk of damage caused by external collisions in traditional top-mounted installation methods, improving the reliability and service life of the device. The lower wiring position significantly improves the convenience of installation and maintenance, and reduces the difficulty of operation.

Description

Technical Field

[0001] This utility model relates to the field of lubrication pump technology, specifically a novel low oil level detection device for an electric plunger lubrication pump. Background Technology

[0002] In existing electric plunger lubrication pumps, real-time monitoring of the oil level in the tank is necessary to ensure lubrication effectiveness. When the oil level is too low, an alarm signal is typically triggered by a microswitch located at the top of the oil cup. This microswitch works by lowering the pressure plate as the oil level decreases, thus activating the microswitch and outputting a signal. However, this design has several drawbacks: First, the microswitch's top-mounted position occupies significant installation space, increasing the overall height and compatibility. Second, during installation and maintenance, the top-mounted microswitch is susceptible to damage from external impacts, reducing its lifespan. Third, the top-mounted design results in high wiring positions, making operation inconvenient and prone to loose wiring or insecure installation, thus affecting the stability of the detection. Therefore, this paper proposes a novel low oil level detection device for electric plunger lubrication pumps to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide a novel low oil level detection device for an electric plunger lubrication pump, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A novel low oil level detection device for an electric plunger lubrication pump includes a pump base assembly, a solenoid valve assembly, a motor controller assembly, and an oil tank assembly. The oil tank assembly is mounted on one upper end of the pump base assembly, the motor controller assembly is mounted on the other upper end of the pump base assembly, the solenoid valve assembly is mounted on one lower end of the pump base assembly, a micro switch push rod is mounted on the inner side of the pump base assembly, a micro switch is mounted on the lower side of the micro switch push rod, and the micro switch is mounted at the bottom end of the pump base assembly.

[0006] Preferably, a pressure plate is installed at the top of the micro switch push rod, and the pressure plate is slidably installed inside the oil tank of the oil tank assembly. A compression spring is installed at the top of the pressure plate.

[0007] Preferably, a return spring is installed on the outer side of the micro switch push rod, and one side of the return spring is connected to the pump base assembly, while the other side of the return spring is connected to the top end of the micro switch push rod.

[0008] Preferably, the cross-section of the micro switch push rod is T-shaped, a limiting seat is installed on the inner side of the pump seat assembly, the limiting seat slides with the micro switch push rod, and the inner diameter of the limiting seat is equal to the diameter of the micro switch push rod. The other end of the reset spring is installed on the outer side of the top of the limiting seat.

[0009] Preferably, a connecting seat is installed at the connection between the micro switch and the pump base assembly, a retaining ring is installed on the inner side of the connecting seat, a retaining groove is opened on the outer side of the micro switch push rod, the micro switch push rod is installed on the inner side of the connecting seat through the retaining groove and the retaining ring, and a sealing ring is installed between the connecting seat and the retaining ring.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] In this invention, the micro switch is installed at the bottom of the pump base, which effectively reduces the overall height of the device, saves installation space, and improves the compactness of the whole machine; the bottom arrangement avoids the risk of damage caused by external collisions in the traditional top-mounted method, and improves the reliability and service life of the device; the wiring position is moved down, which significantly improves the convenience of installation and maintenance and reduces the difficulty of operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This utility model Figure 2 A schematic diagram of the structure at point A;

[0015] Figure 4 This utility model Figure 2 A schematic diagram of the structure at point B.

[0016] In the diagram: 1. Oil tank assembly; 2. Motor controller assembly; 3. Pump base assembly; 4. Solenoid valve assembly; 5. Microswitch push rod; 6. Microswitch; 7. Oil pressure plate; 8. Compression spring; 9. Return spring; 10. Limit seat; 11. Connecting seat; 12. Snap ring; 13. Snap groove; 14. Sealing ring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0019] Please see Figure 1-4 This utility model provides a technical solution:

[0020] A novel low oil level detection device for an electric plunger lubrication pump includes an oil tank assembly 1, a pump base assembly 3, a motor controller assembly 2, and a solenoid valve assembly 4. The upper end of the pump base assembly 3 is fixedly connected to the oil tank assembly 1, and the other end is fixedly connected to the motor controller assembly 2. The solenoid valve assembly 4 is installed on the lower side of the pump base assembly 3. Inside the pump base assembly 3, a microswitch push rod 5 is provided. The lower end of the microswitch push rod 5 abuts against a microswitch 6. The microswitch 6 is fixedly installed at the bottom of the pump base assembly 3 and connected to the pump base assembly 3 via a connecting seat 11. A retaining ring 12 and a sealing ring 14 are provided at the connection point to ensure stable installation and sealing of the microswitch 6.

[0021] The top end of the micro switch push rod 5 is fixedly connected to the pressure plate 7, which is slidably disposed in the inner cavity of the oil tank assembly 1. A compression spring 8 is installed on its upper end. One end of the compression spring 8 contacts the upper inner wall of the oil tank assembly 1, and the other end abuts against the pressure plate 7, providing a rebound force during oil consumption. As the oil level gradually decreases, the pressure plate 7 moves downward under the action of gravity and the spring, thereby pushing the micro switch push rod 5 down to press down the micro switch 6.

[0022] To further ensure the stability of the push rod movement, a return spring 9 is sleeved on the outer side of the micro switch push rod 5. One end of the return spring 9 is fixed to the pump seat assembly 3, and the other end is connected to the upper end of the micro switch push rod 5. When lubricating oil is added, the oil pressure plate 7 moves upward under the action of the compression spring 8, and the return spring 9 simultaneously drives the micro switch push rod 5 back to its original position, so that the micro switch 6 returns from the active state to the initial state.

[0023] In a preferred embodiment, the micro switch push rod 5 has a T-shaped cross-section and is slidably mounted in the limiting seat 10 within the pump seat assembly 3. The inner diameter of the limiting seat 10 is the same as the diameter of the micro switch push rod 5, which serves both as a guide and prevents the push rod from wobbling, ensuring its vertical movement accuracy. One end of the return spring 9 can also be fixed to the outer side of the top end of the limiting seat 10 to further enhance the return stability of the push rod.

[0024] In actual operation, as the lubricating oil in the oil tank assembly 1 is gradually consumed, the pressure plate 7 gradually descends and pushes the micro switch rod 5 downwards. The lower end of the rod 5 contacts the micro switch 6. When it descends to the predetermined position, the micro switch 6 activates and outputs a normally open or normally closed signal, which is transmitted to the motor controller assembly 2 or an external PLC to realize a low oil level alarm. After the lubricating oil is refilled, the pressure plate 7 moves upwards, the return spring 9 pushes the micro switch rod 5 back to its original position, and the micro switch 6 returns to its initial state, completing one detection cycle.

[0025] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel low oil level detection device for an electric plunger lubrication pump, comprising a pump base assembly (3), a solenoid valve assembly (4), a motor controller assembly (2), and an oil tank assembly (1), characterized in that: An oil tank assembly (1) is installed on one upper end of the pump base assembly (3), a motor controller assembly (2) is installed on the other upper end of the pump base assembly (3), a solenoid valve assembly (4) is installed on one lower end of the pump base assembly (3), a micro switch push rod (5) is installed on the inner side of the pump base assembly (3), a micro switch (6) is installed on the lower side of the micro switch push rod (5), and the micro switch (6) is installed at the bottom end of the pump base assembly (3).

2. The novel electric plunger lubrication pump low oil level detection device according to claim 1, characterized in that: The top of the micro switch push rod (5) is equipped with an oil pressure plate (7), and the oil pressure plate (7) is slidably installed inside the oil tank of the oil tank assembly (1). A compression spring (8) is installed on the top of the oil pressure plate (7).

3. The novel electric plunger lubrication pump low oil level detection device according to claim 1, characterized in that: A reset spring (9) is installed on the outside of the micro switch push rod (5), and one side of the reset spring (9) is connected to the pump seat assembly (3), while the other side of the reset spring (9) is connected to the top of the micro switch push rod (5).

4. The novel electric plunger lubrication pump low oil level detection device according to claim 3, characterized in that: The cross-section of the micro switch push rod (5) is T-shaped. A limit seat (10) is installed on the inner side of the pump seat assembly (3). The limit seat (10) slides with the micro switch push rod (5), and the inner diameter of the limit seat (10) is equal to the diameter of the micro switch push rod (5). The other end of the reset spring (9) is installed on the outer side of the top of the limit seat (10).

5. The novel electric plunger lubrication pump low oil level detection device according to claim 1, characterized in that: A connecting seat (11) is installed at the connection between the micro switch (6) and the pump base assembly (3). A retaining ring (12) is installed on the inner side of the connecting seat (11). A retaining groove (13) is opened on the outer side of the micro switch push rod (5). The micro switch push rod (5) is installed on the inner side of the connecting seat (11) through the retaining groove (13) and the retaining ring (12). A sealing ring (14) is installed between the connecting seat (11) and the retaining ring (12).

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