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CN-122029357-A - Pump unit for lubricant pump

CN122029357ACN 122029357 ACN122029357 ACN 122029357ACN-122029357-A

Abstract

The invention relates to a pump unit (4) for a lubricant pump (100), comprising a pump housing (6) which is designed to be connected to a lubricant reservoir (2), wherein the pump housing (6) has a lubricant receiving chamber (12) which has at least one lubricant outlet (20), wherein at least one pump element (14) can be arranged in the lubricant receiving chamber (12) and is designed to convey lubricant from the lubricant reservoir (2) to the lubricant outlet (20) via the lubricant receiving chamber (12), wherein the pump housing (6) further has an integrally formed base plate (10) which is designed to seal the lubricant receiving chamber (12) from the outside environment, and wherein the pump unit (4) further has a pump drive motor (28), in particular an electric motor, which is designed to drive the pump element (14), wherein a motor support (60) is arranged between the base plate (10) and the pump drive motor (28) and is designed to fix the pump drive motor (28) to (6), in particular to the base plate (10).

Inventors

  • O. Grasse
  • F. SCHMIDT
  • H. SCHMIDT

Assignees

  • 德国斯凯孚润滑油系统有限责任公司

Dates

Publication Date
20260512
Application Date
20241009
Priority Date
20231025

Claims (11)

  1. 1. Pump unit (4) for a lubricant pump (100), having a pump housing (6) designed to be connected to a lubricant reservoir (2), wherein the pump housing (6) has a lubricant receiving chamber (12) with at least one lubricant outlet (20), wherein at least one pump element (14) can be arranged in the lubricant receiving chamber (12), which pump element is designed to convey lubricant from the lubricant reservoir (2) to the lubricant outlet (20) via the lubricant receiving chamber (12), wherein the pump housing (6) further comprises an integrally formed base plate (10) designed to close the lubricant receiving chamber (12) with respect to the external environment, and wherein the pump unit (4) further comprises a pump drive motor (28), in particular an electric motor, designed to drive the pump element (14), characterized in that a motor support (60) is arranged between the base plate (10) and the pump housing (28), which motor support is designed to fasten the pump drive motor (28) to the base plate (6), in particular to the base plate (10).
  2. 2. Pump unit (4) according to claim 1, wherein the motor support (60) comprises at least one, preferably a plurality of first fastening means receptacles (52; 66; 68) which interact with first fastening means (74) for fastening the pump drive motor (28) to the motor support (60).
  3. 3. Pump unit (4) according to claim 2, wherein the first fastening means receptacle (52; 66; 68) is designed such that the fastening of the motor takes place from a side of the motor support (60) facing the pump housing (6), in particular the base plate (10).
  4. 4. Pump unit (4) according to any of the preceding claims, wherein the motor support (60) comprises at least one, preferably a plurality of second fastening means receptacles (52; 66; 68) which interact with second fastening means (74) to fasten the motor support (60) to the pump housing (6), in particular to the base plate (10).
  5. 5. Pump unit (4) according to claim 4, wherein the second fastening means receptacle (52; 66; 68) is designed such that fastening of the motor support (60) to the pump housing (6), in particular to the base plate (10), takes place from a side of the motor support (10) facing the pump drive motor (28).
  6. 6. Pump unit (4) according to any of the preceding claims, wherein the motor support (60) is formed as a plate-like element (61).
  7. 7. Pump unit (4) according to any of the preceding claims, wherein the motor support (60) further has a motor receiving structure (70) on its side facing the pump drive motor (28), which is adapted to the shape of the pump drive motor (28).
  8. 8. Pump unit (4) according to claim 7, wherein the motor receiving structure (70) has at least one third fastening receptacle (52; 66; 58) designed to interact with a third fastening means (74), by means of which third fastening means (74) the pump drive motor (28) or pump drive motor component can be fastened to the motor receiving structure (70).
  9. 9. Pump unit (4) according to any of the preceding claims, wherein the motor support (60) is made of plastic, in particular of fiber reinforced plastic, wherein advantageously the motor support (60) is injection molded.
  10. 10. A method for providing a pump unit (4) according to any of the preceding claims, wherein fastening the pump drive motor (28) to the pump housing (6) is performed by: -providing a motor support (60) having a side facing the bottom plate (10) of the pump housing (6) and a side facing the pump drive motor (28); Fastening the pump drive motor (28) to a side of the motor support (60) facing the pump drive motor (28), wherein a pre-assembled unit is provided comprising the pump drive motor (28) and the motor support (60), -Fastening a pre-assembled unit comprising a pump drive motor (28) and a motor support (60) to the pump housing (6).
  11. 11. The method according to claim 10, wherein the pump drive motor (28) is fastened to the motor support (60) from a side facing the bottom plate (10) of the pump housing (6), and/or wherein the pre-assembled unit comprising pump drive motor (28) and motor support (60) is fastened to the pump housing (6) from a side facing the pump drive motor (28).

Description

Pump unit for lubricant pump Technical Field The present invention relates to a pump unit for a lubricant pump according to the preamble of claim 1 and to a method for providing such a pump unit. Background Lubrication systems for supplying lubricant to mechanical components, such as bearings, gears, etc., typically include one or more lubricant pumps that direct lubricant from a reservoir to the mechanical components. Such lubricant pumps may supply lubricant either to an intermediate delivery device, such as an injection nozzle, or directly to the mechanical component via a hose or fluid line. In most lubricant pumps, the reservoir is detachably or inseparably connected to a pump unit, in particular a pump housing, which comprises the actual pump components. The pump components are here generally standardized components, which are used in various applications. Typically, the pump housing includes at least one pump element that delivers lubricant and a pump drive motor that drives the pump element. Typically, the pump element is a piston pump which is capable of delivering lubricant in one direction at high pressure by translational movement of the piston and an internal valve arrangement. The stroke of the piston may be described herein as two phases. During the suction phase, the piston is at least partially open towards the lubricant reservoir and, thanks to the internal valve means, a pressure difference is created such that the pressure in the piston chamber is lower than the pressure in the reservoir or the pressure in the lubricant receiving chamber of the pump housing, whereby lubricant is sucked into the piston chamber. During the discharge phase, the piston is pushed into the shaft or body of the pump element, so that lubricant is pushed out of the piston chamber and into the lubrication system. Typically, the piston is moved by means of an eccentric cam, which is rotationally driven by a pump drive motor. The eccentric cam ensures that the rotational movement is converted into a translational movement. Therefore, the pump drive motor of the lubricant pump is one of the most important components. Typically, an electric motor is used as a pump drive motor, but typically has only a limited service life, so that it must be replaced after a certain operational life. However, the pump drive motor is typically integrated into the lubricant pump in large quantities and is the first component to be assembled. In most lubricant pumps, the motor is mounted from below with screws through the pump housing, as the type of motor used and its mounting flange (worm gear motor) are standard. In this design, the set screw must be sealed in the pump housing. Furthermore, it is disadvantageous that when the pump drive motor is replaced, all lubricant has to be removed from the pump housing in order to access the screw and avoid leakage or contamination of lubricant during disassembly. All this means that changing the pump drive motor is a lengthy and complex process, which is very time consuming. It is therefore an object of the present invention to provide a pump unit for a lubricant pump which allows for a simple replacement of the pump drive motor. Disclosure of Invention This object is achieved by a pump unit according to claim 1. A pump unit for a lubricant pump is described below, wherein the pump unit is equipped with a pump housing which is designed to be connected to a lubricant reservoir. The pump housing furthermore has a lubricant receiving chamber with at least one lubricant outlet, wherein at least one pump element can be arranged in the lubricant receiving chamber, the pump element being designed to convey lubricant from the lubricant reservoir via the lubricant receiving chamber to the lubricant outlet. Furthermore, the pump housing has an integrally formed base plate which is designed to enclose the lubricant receiving chamber with respect to the external environment. Furthermore, the pump unit comprises a pump drive motor, in particular an electric motor, designed to drive the pump element. For simple replacement of the pump drive motor, it is proposed to arrange a motor support between the base plate and the pump drive motor, which is designed to fasten the pump drive motor to the pump housing, in particular to the base plate. Such a separate motor support ensures that the motor support together with the pump drive motor can be easily removed from the base plate and replaced without the risk of lubricant leakage. According to a preferred exemplary embodiment, the motor support has at least one, preferably a plurality of first fastening means receptacles, which interact with the first fastening means for fastening the pump drive motor to the motor support. This allows to create a pre-assembled unit comprising the motor support and the pump drive motor, which can be simply fastened to the pump housing. In this case, it is particularly preferred that the first fastening means receptacle is formed suc