Lubricating grease pumping device and pump head assembly thereof

Abstract

The utility model relates to a lubricating grease pumping device and a pump head assembly thereof, which are used for solving the technical problem that a plunger pair is easy to pump out due to the fact that lubricating grease of an existing stirring rod pump does not move downwards in place. Comprising an oil distribution disc and an output shaft. The rotary oil pressing plate is mounted on the output shaft, rotates along with the output shaft and comprises a main oil pressing inclined surface; the auxiliary pressing plate is located behind the rotating direction of the rotating oil pressing plate, is fixed relative to the rotating oil pressing plate and comprises an auxiliary oil pressing inclined plane, the lower side of the auxiliary oil pressing inclined plane is arranged close to the upper surface of the oil distribution disc, and the upper side of the auxiliary oil pressing inclined plane is as high as the lower side of the main oil pressing inclined plane; the stirring rod comprises a mounting plate fixed relative to the rotary oil pressing plate and a connecting plate detachably connected with the mounting plate, a rubber oil scraping plate is vulcanized on the connecting plate, and the outer side edge of the rubber oil scraping plate is used for being extruded on the inner wall of the oil tank.

Description

Technical Field

[0001] The utility model relates to a grease pumping device and a pump head assembly thereof. Background Art

[0002] In the field of dry oil lubrication, a lubricating pump can suck out the grease in an oil tank and pump it into a lubricating pipeline. The grease in the upper oil tank slowly creeps downward by gravity, passes through the oil passing holes on the oil distribution plate, and then enters near the plunger pair, where it is sucked away by the plunger pair. However, for very viscous grease or in a relatively low-temperature environment, the grease has difficulty flowing, will accumulate above the oil distribution plate or adhere to the inner wall of the oil tank, and the plunger pair in the pump head assembly can only suck the grease near the grease inlet. This situation will cause the plunger pair to run out of oil.

[0003] Existing stirring rod pumps generally install a rotating oil pressing plate and a stirring rod on the output shaft of a transmission mechanism. The stirring rod is used to stir the grease and scrape the grease from the oil tank, and the rotating oil pressing plate is used to squeeze the grease towards the oil distribution plate. However, such stirring rod pumps have the following problems:

[0004] 1. A rubber sleeve is sleeved on the stirring rod, and the outer surface of the rubber sleeve contacts the inner wall of the oil tank to scrape the grease on the inner wall. However, when using this rubber sleeve, with the reaction between the rubber and some components in the grease, the influence of the environmental high temperature, or the aging of the rubber sleeve, the rubber sleeve will expand, which makes it easy to detach from the stirring rod, and the distance between the expanded rubber sleeve and the inner wall of the oil tank also changes accordingly, affecting the normal oil scraping effect;

[0005] 2. The rotating oil pressing plate can only squeeze the grease within a range of 10 - 30 mm above the oil distribution plate downward, but the grease within a range of 0 - 10 mm above the oil distribution plate will still accumulate on the oil distribution plate and cannot continue to flow downward, and the problem of running out of oil still cannot be avoided. Content of the Utility Model

[0006] The purpose of the utility model is to provide a pump head assembly to solve the technical problem that the grease in the existing stirring rod pump cannot descend properly, resulting in the plunger pair being easily emptied; the purpose of the utility model is also to provide a grease pumping device adopting the above pump head assembly.

[0007] The technical solution of the pump head assembly of the utility model is as follows: The pump head assembly includes:

[0008] An oil distribution plate;

[0009] A transmission mechanism, including an output shaft;

[0010] A rotating oil pressing plate, located behind the rotating direction of the rotating oil pressing plate, installed on the output shaft and rotating with the output shaft, including a main oil pressing inclined surface;

[0011] The auxiliary pressing plate is fixed relative to the rotating oil pressing plate and includes an auxiliary oil pressing inclined surface. The lower side of the auxiliary oil pressing inclined surface is arranged close to the upper surface of the oil distribution disc, and the upper side of the auxiliary oil pressing inclined surface is at the same height as the lower side of the main oil pressing inclined surface;

[0012] The stirring rod includes a mounting plate fixed relative to the rotating oil pressing plate and a connecting plate detachably connected to the mounting plate. A rubber oil scraping plate is vulcanized on the connecting plate, and the outer side edge of the rubber oil scraping plate is used to press against the inner wall of the fuel tank.

[0013] The beneficial effects of this solution: During use, when the stirring rod rotates with the output shaft, while the stirring rod stirs the grease, the rubber oil scraping plate pressing against the inner wall of the fuel tank can scrape off the grease on the inner wall of the fuel tank, making the grease easier to descend, rather than clumping and adhering to the inner wall of the fuel tank and being unable to descend. When the rotating oil pressing plate rotates with the output shaft, its main oil pressing inclined surface faces the grease, and the grease is squeezed downward by relying on the main oil pressing inclined surface, so that the grease can accumulate on the upper part of the oil distribution disc. Subsequently, the subsequent auxiliary pressing plate uses its auxiliary oil pressing inclined surface which is lower than the main oil pressing inclined surface as a whole to further squeeze the grease accumulated above the oil distribution disc downward and into the interior and lower part of the oil distribution disc, so that it can be sucked away by the plunger pair below the oil distribution disc, effectively solving the problem of air extraction, and the structure is very simple and will not increase the cost too much; the structure of the stirring rod adopts the docking method of the connecting plate and the mounting plate, which can effectively avoid the situation that the rubber oil scraping plate falls off from the mounting plate. The combination method of the connecting plate and the vulcanized rubber oil scraping plate not only ensures that the whole has sufficient strength and hardness, but also makes the front end in contact with the inner wall of the fuel tank have a certain elasticity, ensuring good oil scraping effect and connection strength.

[0014] Further, the mounting plate and the connecting plate are riveted or bolted. The riveting method has lower cost and is less likely to become loose, while the bolt method is more convenient for disassembly and assembly.

[0015] Further, a chamfer is provided on the outer side edge of the rubber oil scraping plate. It forms a shape similar to a blade, and the oil scraping effect is better.

[0016] Further, the mounting plate is an L-shaped plate and is bolted to the rotating oil pressing plate. The detachable structure of the mounting plate makes disassembly, assembly and processing more flexible and convenient.

[0017] Further, the auxiliary pressing plate is a folding plate with an obtuse angle, and the auxiliary pressing plate and the mounting plate are connected to the rotating oil pressing plate by the same set of bolts. This structure is simple, the combination is flexible and convenient, and using the same set of bolts can reduce costs and improve strength.

[0018] The technical solution of the grease pumping device of the present utility model is as follows: The grease pumping device includes a fuel tank and a pump head assembly. The fuel tank is detachably installed above the pump head assembly, and the output shaft of the transmission mechanism extends upward from within the pump head assembly to the lower part of the fuel tank;

[0019] The pump head assembly includes:

[0020] The oil distribution plate;

[0021] The transmission mechanism, including the output shaft;

[0022] The rotating oil pressing plate, located behind the rotating direction of the rotating oil pressing plate, is installed on the output shaft and rotates with the output shaft, and includes a main oil pressing inclined surface;

[0023] The auxiliary pressing plate, which is fixed relative to the rotating oil pressing plate, includes an auxiliary oil pressing inclined surface. The lower side of the auxiliary oil pressing inclined surface is arranged close to the upper surface of the oil distribution plate, and the upper side of the auxiliary oil pressing inclined surface is at the same height as the lower side of the main oil pressing inclined surface;

[0024] The stirring rod includes a mounting plate fixed relative to the rotating oil pressing plate and a connecting plate detachably connected to the mounting plate. A rubber oil scraping plate is vulcanized on the connecting plate, and the outer side edge of the rubber oil scraping plate is used to press against the inner wall of the fuel tank.

[0025] The beneficial effects of this solution: When in use, when the stirring rod rotates with the output shaft, while the stirring rod stirs the grease, the rubber oil scraping plate pressed against the inner wall of the fuel tank can scrape off the grease on the inner wall of the fuel tank, making the grease easier to flow downward, rather than clumping and adhering to the inner wall of the fuel tank and being unable to flow downward. When the rotating oil pressing plate rotates with the output shaft, its main oil pressing inclined surface faces the grease, and the grease is squeezed downward by relying on the main oil pressing inclined surface, so that the grease can accumulate on the upper part of the oil distribution plate. Subsequently, the subsequent auxiliary pressing plate uses its auxiliary oil pressing inclined surface that is lower than the main oil pressing inclined surface as a whole to further squeeze the grease accumulated above the oil distribution plate downward and into the interior and lower part of the oil distribution plate, so that it can be sucked away by the plunger pair below the oil distribution plate, effectively solving the problem of air extraction, and the structure is very simple and will not increase the cost too much; the structure of its stirring rod adopts the docking method of the connecting plate and the mounting plate, which can effectively avoid the situation that the rubber oil scraping plate falls off from the mounting plate. The combination method of the connecting plate and the vulcanized rubber oil scraping plate not only ensures that the whole has sufficient strength and hardness, but also makes the front end in contact with the inner wall of the fuel tank have a certain elasticity, ensuring good oil scraping effect and connection strength.

[0026] Further, the mounting plate and the connecting plate are riveted or bolted. The riveting method has lower cost and is less likely to become loose, while the bolt method is more convenient for disassembly and assembly.

[0027] Further, a chamfer is provided on the outer side edge of the rubber oil scraping plate. It forms a shape similar to a blade, and the oil scraping effect is better.

[0028] Further, the mounting plate is an L-shaped plate and is bolted to the rotating oil pressing plate. The detachable structure of the mounting plate makes disassembly, assembly and processing more flexible and convenient.

[0029] Further, the auxiliary pressing plate is a folding plate with an obtuse angle. The auxiliary pressing plate and the mounting plate are connected to the rotating oil pressing plate through the same set of bolts. This structure is simple and the combination is flexible and convenient. Using the same set of bolts can reduce costs and improve strength.

[0030] Further, a fixed stirring bar is fixed at the top of the fuel tank. The closest distance between the fixed stirring bar and the side wall of the fuel tank is greater than the width of the stirring rod. The setting of the fixed stirring bar can stir the grease driven by the stirring rod. The stirring rod and the fixed stirring bar are arranged staggeredly, one moving and one static, which can make the grease be stirred better and more evenly, rather than just stirring the grease close to the inner wall of the fuel tank.

[0031] Further, the cross-section of the fixed stirring bar is T-shaped. It has higher strength and sufficient stirring cross-section. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a three-dimensional structural schematic diagram of a pump head assembly of a specific embodiment of a grease pumping device of the present utility model;

[0033] Figure 2 is Figure 1 a three-dimensional structural schematic diagram of the fuel tank;

[0034] Figure 3 is Figure 1 a three-dimensional structural schematic diagram of the stirring rod assembly;

[0035] Figure 4 is Figure 3 a schematic diagram of another perspective structure;

[0036] Figure 5 is a cross-sectional schematic diagram of the grease pumping device;

[0037] Figure 6 is Figure 5 a partial enlarged view at A in;

[0038] In the figure: 1 - fuel tank, 11 - fixed stirring bar, 2 - pump head assembly, 21 - oil distribution disk, 22 - output shaft, 23 - rotating oil pressing plate, 231 - main oil pressing inclined plane, 24 - auxiliary pressing plate, 241 - auxiliary oil pressing inclined plane, 25 - stirring rod, 251 - mounting plate, 252 - connecting plate, 253 - rubber oil scraping plate, 26 - rivet, 27 - bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. The components of the embodiments of the present utility model generally described and illustrated in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the detailed description of the embodiments of the present utility model provided in the drawings below is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0041] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0042] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0043] A specific embodiment of a grease pumping device of the present utility model: As Figures 1-6 shown, the grease pumping device is a stirring rod type grease pump used in a centralized lubrication system, mainly including a pump head assembly 2 and an oil tank 1. The pump head assembly 2 includes a distribution disk 21, a plunger pair, a transmission mechanism, a reduction mechanism, a motor, a monitor, etc.

[0044] Among them, a plurality of oil passing holes are provided on the distribution disk 21, and the distribution disk 21 is located between the pump head assembly 2 and the oil tank 1.

[0045] The output shaft 22 of the transmission mechanism extends upward from within the pump head assembly 2 until it enters the lower part of the oil tank 1.

[0046] An oil pressing assembly and a stirring assembly are installed on the output shaft 22, including a rotating oil pressing plate 23, an auxiliary pressing plate 24, and a stirring rod 25. The rotating oil pressing plate 23 is installed on the output shaft 22 and rotates with the output shaft 22. It includes a main oil pressing inclined surface 231. The lowest side of the main oil pressing inclined surface 231 is about 10 mm away from the upper surface of the oil distribution disc 21. It can squeeze the grease within the range of 10 - 30 mm away from the upper surface of the oil distribution disc 21 downward.

[0047] The auxiliary pressing plate 24 is located behind the rotating oil pressing plate 23 in the rotating direction and is fixed relative to the rotating oil pressing plate 23. It includes an auxiliary oil pressing inclined surface 241. The lower side of the auxiliary oil pressing inclined surface 241 is arranged close to the upper surface of the oil distribution disc 21. The upper side of the auxiliary oil pressing inclined surface 241 is at the same height as the lower side of the main oil pressing inclined surface 231. It can squeeze the grease within the range of 0 - 10 mm away from the upper surface of the oil distribution disc 21 downward, so that the grease enters below the oil distribution disc 21. The auxiliary pressing plate 24 is a folding plate with an obtuse angle. The auxiliary pressing plate 24 and the mounting plate 251 are connected to the rotating oil pressing plate 23 through the same set of bolts. This structure is simple and the combination is flexible and convenient. Using the same set of bolts can reduce costs and improve strength.

[0048] The stirring rod 25 includes a mounting plate 251 fixed relative to the rotating oil pressing plate 23 and a connecting plate 252 detachably connected to the mounting plate 251. A rubber oil scraping plate 253 is vulcanized on the connecting plate 252. The outer side edge of the rubber oil scraping plate 253 is used to press against the inner wall of the fuel tank 1. The mounting plate 251 and the connecting plate 252 are riveted or bolted. The riveting method has lower cost and is less likely to become loose, while the bolt method is more convenient for disassembly and assembly. The outer side edge of the rubber oil scraping plate 253 is provided with a chamfer, forming a shape similar to a blade, and the oil scraping effect is better. The mounting plate 251 is an L-shaped plate and is connected to the rotating oil pressing plate 23 by bolts. The detachable structure of the mounting plate 251 makes disassembly, assembly, and processing more flexible and convenient.

[0049] A fixed stirring bar 11 is fixed on the top of the fuel tank 1. The closest distance between the fixed stirring bar 11 and the side wall of the fuel tank 1 is greater than the width of the stirring rod 25. The setting of the fixed stirring bar 11 can play a role in stirring the grease rotated by the stirring rod 25. The stirring rod 25 and the fixed stirring bar 11 are arranged staggeredly, one moving and one static, which can make the grease be stirred better and more evenly, rather than just stirring the grease close to the inner wall of the fuel tank 1. The cross-section of the fixed stirring bar 11 is T-shaped, which has higher strength and a sufficient stirring cross-section.

[0050] During use, when the stirring rod 25 rotates with the output shaft 22, while the stirring rod 25 stirs the grease, the rubber oil scraping plate 253 pressed against the inner wall of the fuel tank 1 can scrape off the grease on the inner wall of the fuel tank 1, making it easier for the grease to descend, rather than agglomerating and adhering to the inner wall of the fuel tank 1 and being unable to descend. When the rotating oil pressing plate 23 rotates with the output shaft 22, its main oil pressing inclined surface 231 faces the grease, and the grease is squeezed downward by relying on the main oil pressing inclined surface 231, so that the grease can accumulate on the upper part of the oil distribution plate 21. Subsequently, the subsequent auxiliary pressing plate 24 uses its auxiliary oil pressing inclined surface 241 which is lower than the main oil pressing inclined surface 231 as a whole to further squeeze the grease accumulated above the oil distribution plate 21 downward and into the inside and lower part of the oil distribution plate 21, so that it can be sucked away by the plunger pair below the oil distribution plate 21, effectively solving the problem of air extraction, and the structure is very simple without adding too much cost; the structure of the stirring rod 25 adopts the way of butt-joint of the connecting plate 252 and the mounting plate 251, which can effectively avoid the situation that the rubber oil scraping plate 253 falls off from the mounting plate 251. The combination mode of the connecting plate 252 and the vulcanized rubber oil scraping plate 253 not only ensures that the whole has sufficient strength and hardness, but also makes the front end in contact with the inner wall of the fuel tank 1 have a certain elasticity, ensuring good oil scraping effect and connection strength.

[0051] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should be equally included in the protection scope of the present invention.

Claims

1. The pump head assembly includes: The oil distribution plate; The transmission mechanism, including the output shaft; The rotating oil pressing plate, which is installed on the output shaft and rotates with the output shaft, and includes the main oil pressing inclined plane; It is characterized in that it further includes: The auxiliary pressing plate, which is located behind the rotating direction of the rotating oil pressing plate and is fixed relative to the rotating oil pressing plate, includes the auxiliary oil pressing inclined plane. The lower side of the auxiliary oil pressing inclined plane is arranged close to the upper surface of the oil distribution plate, and the upper side of the auxiliary oil pressing inclined plane is at the same height as the lower side of the main oil pressing inclined plane; The stirring rod includes a mounting plate fixed relative to the rotating oil pressing plate and a connecting plate detachably connected to the mounting plate. A rubber oil scraping plate is vulcanized on the connecting plate, and the outer side edge of the rubber oil scraping plate is used for extruding against the inner wall of the fuel tank.

2. The pump head assembly according to claim 1, wherein, The mounting plate and the connecting plate are riveted or bolted.

3. The pump head assembly according to claim 1 or 2, characterized in that, The outer side edge of the rubber oil scraping plate is provided with a chamfer.

4. The pump head assembly according to claim 1 or 2, characterized in that, The mounting plate is an L-shaped plate and is connected to the rotating oil pressing plate by bolts.

5. The pump head assembly according to claim 4, characterized in that, The auxiliary pressing plate is a folding plate with an obtuse angle. The auxiliary pressing plate and the mounting plate are connected to the rotating oil pressing plate by the same set of bolts.

6. A grease pumping device, characterized in that, It includes a fuel tank and the pump head assembly according to any one of claims 1-5. The fuel tank is detachably installed above the pump head assembly, and the output shaft of the transmission mechanism extends upward from within the pump head assembly to the lower part of the fuel tank.

7. The grease pumping device according to claim 6, wherein A fixed stirring bar is fixed to the top of the fuel tank, and the closest distance between the fixed stirring bar and the side wall of the fuel tank is greater than the width of the stirring rod.

8. The grease pumping device according to claim 7, characterized in that, The cross section of the fixed stirring bar is T-shaped.

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