Large-displacement handheld electric greasing gun and lubricating pump

Abstract

The utility model relates to a large-displacement handheld electric greasing gun and a lubricating pump, which are used for solving the technical problems that the traditional handheld greasing gun is slow in lubricating grease filling and low in lubricating efficiency. Comprising a battery, a grease storage barrel, a driving module, a grease pumping module and a converging block, the driving module comprises a gear motor and a transmission mechanism, the transmission mechanism comprises a worm and gear mechanism and at least two sets of slider-crank mechanisms, each slider-crank mechanism comprises a rotating pair, a connecting rod and a slider, and the rotating pair comprises a rotating crankshaft vertically arranged on the side face of a worm gear; one end of the connecting rod is rotationally assembled on the rotating crankshaft through a sleeve, and the other end is hinged with the slider; the grease pumping module comprises plunger pairs arranged in one-to-one correspondence with the slider-crank mechanisms, each plunger pair comprises a valve body, a plunger valve element and a one-way valve, the one-way valves are arranged at the outlet end of a valve cavity, the sliding blocks are fixedly connected with the plunger valve elements, and the converging block is provided with a main oil duct communicated with the grease injection gun head and branch oil ducts connected with the one-way valves in a one-to-one correspondence mode. And each branch oil duct is communicated with the main oil duct.

Description

Technical Field

[0001] This utility model relates to a large-displacement handheld electric grease gun and a lubrication pump. Background Technology

[0002] In the field of construction machinery, a centralized lubrication system is generally used to lubricate each friction pair. Taking an excavator as an example, an excavator is generally equipped with a centralized lubrication system. The system mainly includes a lubrication pump, multiple distributors, pipelines and connectors. The lubrication pump pressurizes and pumps the grease to each distributor. After quantitative distribution, each distributor supplies the distributed grease to each friction pair through pipelines.

[0003] However, in actual use, the working parts of the excavator - the bucket - are in direct contact with the material. The lubrication lines and distributors arranged in the connecting rods, rocker arms, etc. are often easily damaged by the impact of the material, affecting the overall operation of the lubrication system. However, the lubrication lines and distributors installed at the friction pairs of other parts are not prone to damage.

[0004] Therefore, users want parts that are easily damaged by impact, such as connecting rods and rocker arms, to be manually lubricated, while the rest of the equipment continues to be lubricated centrally. However, the current handheld grease guns are too slow to apply grease to the friction pairs, resulting in low lubrication efficiency and wasting valuable working time of the equipment. Utility Model Content

[0005] The purpose of this utility model is to provide a large-displacement handheld electric grease gun to solve the technical problems of slow grease filling and low lubrication efficiency of traditional handheld grease guns; the purpose of this utility model is also to provide a lubrication pump equipped with the above-mentioned large-displacement handheld electric grease gun.

[0006] The technical solution of this utility model's large-displacement handheld electric grease gun is as follows: The large-displacement handheld electric grease gun includes:

[0007] The housing includes a hand handle and a grease gun head;

[0008] Battery;

[0009] fat storage container;

[0010] The drive module includes a geared motor and a transmission mechanism. The transmission mechanism includes a worm gear mechanism and at least two sets of crank-slider mechanisms. The crank-slider mechanism includes a rotary pair, a connecting rod, and a slider. The rotary pair includes a rotating crankshaft that is vertically arranged on the side of the turbine. One end of the connecting rod is rotatably mounted on the rotating crankshaft through a sleeve, and the other end is hinged to the slider.

[0011] The grease pumping module includes plunger pairs that correspond one-to-one with the crank-slider mechanism. Each plunger pair includes a valve body, a plunger valve core, and a one-way valve. The valve body has a valve cavity, and the plunger is slidably sealed and assembled in the valve cavity. The one-way valve is located at the outlet end of the valve cavity. The slider is fixedly connected to the plunger valve core.

[0012] The manifold has a main oil passage that connects to the grease gun head and branch oil passages that are connected to each check valve. Each branch oil passage is connected to the main oil passage.

[0013] The beneficial effects of this solution are as follows: When the large-displacement handheld electric grease gun of this application is in operation, its reduction motor drives the worm gear mechanism, and the worm can simultaneously drive at least two sets of crank-slider mechanisms. Each crank-slider mechanism drives a set of plunger pairs to pump grease. Under the premise of backflow prevention by the one-way valve, the grease from each plunger pair is converged through the manifold and discharged from the grease gun head. It is evident that because the plunger pairs operate alternately, the grease gun head provides continuous grease discharge. Combined with the convergence of the plunger pairs, its displacement is significantly increased compared to traditional structures, meeting the needs of rapid grease application for the working parts of engineering machinery. It has the advantages of compact structure, large displacement, and high grease application efficiency.

[0014] Furthermore, the geared motor is a speed-regulating motor, and its speed can be adjusted via a switch to control the grease dispensing speed of the grease pumping module. By setting the geared motor of the drive module as a speed-regulating motor, such as a variable frequency motor, the speed of the turbine is changed by adjusting the motor's speed, thereby changing the grease pumping speed of the plunger assembly. This allows the displacement of the grease gun to be flexibly adjusted. High speed and large displacement are used when rapid grease injection is required, while low speed and small displacement are used when rapid grease injection is not needed, in order to minimize the wear rate of the grease gun and improve its lifespan.

[0015] Furthermore, the connection points of each rotating crankshaft and turbine are located on the same circle of the turbine, and the structural dimensions of each crank-slider mechanism and each plunger pair are identical. This arrangement allows the crank-slider mechanism and plunger pairs to be made into standard modules, reducing manufacturing and assembly costs.

[0016] Furthermore, the end of each rotating crankshaft furthest from the turbine is rotatably fitted with a mounting sleeve on the housing. This arrangement ensures that both ends of the rotating crankshaft have support points, preventing one end from being cantilevered, thereby improving the fitting accuracy of the components and extending their service life.

[0017] Furthermore, there are two sets of crank-slider mechanism and plunger pair, with the two rotating crankshafts coaxially arranged and the two mounting sleeves coaxially arranged. This arrangement results in a more compact structure and facilitates machining and assembly.

[0018] Furthermore, there are at least three sets of crank-slider mechanisms and plunger pairs, with each rotating crankshaft evenly distributed along the circumference of the turbine.

[0019] Furthermore, the grease gun head features a multi-section telescopic tube structure. This ensures that the grease gun head can extend to lubrication points in different areas, preventing situations where lubrication points in narrow areas cannot be reached.

[0020] Furthermore, an oil pressure sensor is connected to the main oil passage. The oil pressure sensor ensures system safety during grease injection and protects the grease gun and lubrication points from blockages.

[0021] The technical solution of the lubrication pump of this utility model is as follows: The lubrication pump includes:

[0022] Pump head assembly;

[0023] tank;

[0024] It also includes a large-displacement handheld electric grease gun that can be detachably connected to the outside of the fuel tank. The large-displacement handheld electric grease gun includes:

[0025] The housing includes a hand handle and a grease gun head;

[0026] Battery;

[0027] fat storage container;

[0028] The drive module includes a geared motor and a transmission mechanism. The transmission mechanism includes a worm gear mechanism and at least two sets of crank-slider mechanisms. The crank-slider mechanism includes a rotary pair, a connecting rod, and a slider. The rotary pair includes a rotating crankshaft that is vertically arranged on the side of the turbine. One end of the connecting rod is rotatably mounted on the rotating crankshaft through a sleeve, and the other end is hinged to the slider.

[0029] The grease pumping module includes plunger pairs that correspond one-to-one with the crank-slider mechanism. Each plunger pair includes a valve body, a plunger valve core, and a one-way valve. The valve body has a valve cavity, and the plunger is slidably sealed and assembled in the valve cavity. The one-way valve is located at the outlet end of the valve cavity. The slider is fixedly connected to the plunger valve core.

[0030] The manifold has a main oil passage that connects to the grease gun head and branch oil passages that are connected to each check valve. Each branch oil passage is connected to the main oil passage.

[0031] The beneficial effects of this solution are as follows: When the large-displacement handheld electric grease gun of this application is in operation, its reduction motor drives the worm gear mechanism, and the worm can simultaneously drive at least two sets of crank-slider mechanisms. Each crank-slider mechanism drives a set of plunger pairs to pump grease. Under the premise of backflow prevention by the one-way valve, the grease from each plunger pair is converged through the manifold and discharged from the grease gun head. It is evident that because the plunger pairs operate alternately, the grease gun head provides continuous grease discharge. Combined with the convergence of the plunger pairs, its displacement is significantly increased compared to traditional structures, meeting the needs of rapid grease application for the working parts of engineering machinery. It has the advantages of compact structure, large displacement, and high grease application efficiency.

[0032] Furthermore, the geared motor is a speed-regulating motor, and its speed can be adjusted via a switch to control the grease dispensing speed of the grease pumping module. By setting the geared motor of the drive module as a speed-regulating motor, such as a variable frequency motor, the speed of the turbine is changed by adjusting the motor's speed, thereby changing the grease pumping speed of the plunger assembly. This allows the displacement of the grease gun to be flexibly adjusted. High speed and large displacement are used when rapid grease injection is required, while low speed and small displacement are used when rapid grease injection is not needed, in order to minimize the wear rate of the grease gun and improve its lifespan.

[0033] Furthermore, the connection points of each rotating crankshaft and turbine are located on the same circle of the turbine, and the structural dimensions of each crank-slider mechanism and each plunger pair are identical. This arrangement allows the crank-slider mechanism and plunger pairs to be made into standard modules, reducing manufacturing and assembly costs.

[0034] Furthermore, the end of each rotating crankshaft furthest from the turbine is rotatably fitted with a mounting sleeve on the housing. This arrangement ensures that both ends of the rotating crankshaft have support points, preventing one end from being cantilevered, thereby improving the fitting accuracy of the components and extending their service life.

[0035] Furthermore, there are two sets of crank-slider mechanism and plunger pair, with the two rotating crankshafts coaxially arranged and the two mounting sleeves coaxially arranged. This arrangement results in a more compact structure and facilitates machining and assembly.

[0036] Furthermore, there are at least three sets of crank-slider mechanisms and plunger pairs, with each rotating crankshaft evenly distributed along the circumference of the turbine.

[0037] Furthermore, the grease gun head features a multi-section telescopic tube structure. This ensures that the grease gun head can extend to lubrication points in different areas, preventing situations where lubrication points in narrow areas cannot be reached.

[0038] Furthermore, an oil pressure sensor is connected to the main oil passage. The oil pressure sensor ensures system safety during grease injection and protects the grease gun and lubrication points from blockages.

[0039] Furthermore, the oil tank is equipped with a positioning and locking assembly for placing and fixing the large-displacement handheld electric grease gun.

[0040] Furthermore, the positioning and locking assembly includes a metal hook for positioning and suspending the handheld electric grease gun and a clamp assembly for securing the handheld electric grease gun. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the external structure of a specific embodiment of the large-displacement handheld electric grease gun of this utility model;

[0042] Figure 2 for Figure 1 Schematic diagram of the working principle;

[0043] Figure 3 for Figure 1 A schematic diagram illustrating the working principle of the transmission mechanism and grease pump module in the diagram.

[0044] Figure 4 This is a schematic diagram of the structure of the lubrication pump of this utility model;

[0045] In the diagram: 1-Lubrication pump, 11-Pump head assembly, 12-Oil tank, 121-Metal hook, 2-Large displacement handheld electric grease gun, 21-Battery, 22-Grease reservoir, 23-Drive module, 231-Gear motor, 232-Turbine, 233-Worm gear, 234-Rotating crankshaft, 235-Mounting sleeve, 236-Connecting rod, 237-Slider, 24-Grease pump module, 241-Valve body, 242-Plunger valve core, 243-Check valve, 25-Manifold, 251-Main oil passage, 252-Branch oil passage, 26-Oil pressure sensor, 27-Grease gun head, 28-Switch. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0048] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0050] A specific embodiment of this utility model of a large-displacement handheld electric grease gun is as follows: Figure 1-3 As shown, the high-displacement handheld electric grease gun 2 includes a housing, a battery 21, a grease reservoir 22, a drive module 23, a grease pumping module 24, and a manifold 25.

[0051] Among them, such as Figure 1 As shown, the housing includes a hand handle and a grease gun head 27, which is a multi-section telescopic tube structure. This ensures that the grease gun head 27 can extend to lubrication points in different areas, avoiding situations where lubrication points in narrow areas cannot be reached. The battery 21 is a rechargeable battery and is detachably connected to the housing. The grease reservoir 22 is used to store grease and is detachably connected to the housing. The grease reservoir 22 has a grease inlet and outlet.

[0052] like Figure 2-3As shown, the drive module 23 includes a geared motor 231 and a transmission mechanism. The geared motor 231 is a speed-regulating motor, and its speed can be adjusted via switch 28 to control the grease dispensing speed of the grease pumping module 24. By setting the geared motor 231 of the drive module 23 as a speed-regulating motor, such as a variable frequency motor, the speed of the turbine 232 is changed by adjusting the motor's speed, thereby changing the grease pumping speed of the plunger assembly. This allows for flexible adjustment of the grease gun's displacement. High speed and large displacement are used when rapid grease dispensing is required, while low speed and small displacement are used when rapid grease dispensing is not needed, in order to minimize the wear rate of the grease gun and improve its lifespan. The transmission mechanism includes a worm gear 233 mechanism and at least two sets of crank-slider mechanisms. The crank-slider mechanism includes a rotating joint, a connecting rod 236, and a slider 237. The rotating joint includes a rotating crankshaft 234 vertically disposed on the side of the turbine 232. One end of the connecting rod 236 is rotatably mounted on the rotating crankshaft 234 via a sleeve, and the other end is hinged to the slider 237. The grease pumping module 24 includes plunger pairs corresponding to the crank-slider mechanism. Each plunger pair includes a valve body 241, a plunger valve core 242, and a check valve 243. The valve body 241 has a valve cavity, in which the plunger is slidably and sealed. The check valve 243 is located at the outlet end of the valve cavity. The slider 237 is fixedly connected to the plunger valve core 242. The manifold 25 has a main oil passage communicating with the grease gun head 27 and branch oil passages corresponding to each check valve 243. Each branch oil passage communicates with the main oil passage. An oil pressure sensor 26 is connected to the main oil passage 251. The oil pressure sensor 26 ensures system safety during grease injection and protects the grease gun and lubrication points from blockages.

[0053] In this embodiment, there are two sets of crank-slider mechanism and two sets of plunger pairs, with two rotating crankshafts 234 coaxially arranged and two mounting sleeves 235 coaxially arranged. This arrangement results in a more compact structure and facilitates machining and assembly. In other embodiments, the connection points of each rotating crankshaft 234 and the turbine 232 are located on the same circle of the turbine 232, and the structural dimensions of each crank-slider mechanism and each plunger pair are identical. This arrangement allows both the crank-slider mechanism and the plunger pairs to be made into standard modules, reducing manufacturing and assembly costs. The end of each rotating crankshaft 234 furthest from the turbine 232 is rotatably engaged with the mounting sleeve 235 on the housing. This arrangement ensures that both ends of the rotating crankshaft 234 have support points, avoiding cantilever at one end, thereby improving the fitting accuracy of the components and extending their service life. In other embodiments, there are at least three sets of crank-slider mechanism and two sets of plunger pairs, with each rotating crankshaft 234 evenly distributed circumferentially along the turbine 232.

[0054] In operation, the large-displacement handheld electric grease gun 2 of this application utilizes a reduction motor 231 to drive a worm gear 233 mechanism. The turbine 232 simultaneously drives at least two crank-slider mechanisms. Each crank-slider mechanism drives a plunger assembly to pump grease. With the backflow prevention function of the one-way valve 243, the grease from each plunger assembly converges through the manifold 25 and is discharged from the grease gun head 27. As the plunger assemblies operate alternately, continuous grease dispensing from the grease gun head 27 is ensured. Furthermore, the convergence of the grease from each plunger assembly significantly increases the displacement compared to traditional structures, meeting the rapid grease application requirements of engineering machinery. It boasts advantages such as compact structure, large displacement, and high grease injection efficiency.

[0055] A specific embodiment of the lubrication pump of this utility model mainly includes a pump head assembly 11, an oil tank 12, and a high-displacement handheld electric grease gun 2. The oil tank 12 is equipped with a positioning and locking assembly for placing and fixing the high-displacement handheld electric grease gun 2. The positioning and locking assembly includes a metal hook 121 for positioning and suspending the handheld electric grease gun and a clamp assembly for fixing the handheld electric grease gun. The structure of the high-displacement handheld electric grease gun 2 is the same as that in the various embodiments described above, and will not be repeated.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A high volume hand-held electrically powered greasing gun characterised in that, The utility model relates to a large displacement handheld electric grease gun, comprising: a housing including a handheld handle and a grease injection head; a battery; a grease storage cylinder; a drive module including a speed reducer motor and a transmission mechanism, the transmission mechanism including a worm gear mechanism and at least two sets of crank slider mechanisms, each crank slider mechanism including a rotating pair, a connecting rod, and a slider, the rotating pair including a rotating crankshaft vertically arranged on a side of a turbine, one end of the connecting rod rotatably assembled on the rotating crankshaft via a sleeve, and the other end hingedly connected to the slider; a grease pumping module including a plunger pair corresponding to each crank slider mechanism, the plunger pair including a valve body, a plunger valve core, and a one-way valve, the valve body having a valve cavity in which the plunger is slidingly and sealingly assembled, and the one-way valve arranged at an outlet end of the valve cavity, the slider fixedly connected to the plunger valve core; a confluence block having a main oil passage in communication with the grease injection head and branch oil passages corresponding to each one-way valve, each branch oil passage in communication with the main oil passage.

2. The high volume hand-held electric fat liquoring gun of claim 1 wherein, The speed reducer motor is a speed-adjustable motor, and the rotational speed of the speed reducer motor can be adjusted by a switch to control the grease output speed of the grease pumping module.

3. The high volume hand-held electric fat liquoring gun of claim 1 wherein, Each rotating crankshaft has a connection point with the turbine located on the same circle of the turbine, each crank slider mechanism has the same structural size, and each plunger pair has the same structural size.

4. The high volume hand-held electric fat liquoring gun of claim 3 wherein, Each rotating crankshaft has an end away from the turbine rotatably fitted with a mounting sleeve arranged on the housing.

5. The high volume hand-held electric fat liquoring gun of claim 4 wherein, Each crank slider mechanism and plunger pair has two sets, and the two rotating crankshafts are coaxially arranged, and the two mounting sleeves are coaxially arranged.

6. The high volume hand held electric fat liquoring gun of claim 4 wherein, Each crank slider mechanism and plunger pair has at least three sets, and each rotating crankshaft is evenly distributed along the circumference of the turbine.

7. The high volume hand held electric fat liquoring gun of claim 1 wherein, The grease injection head has a multi-section telescopic pipe structure.

8. The high volume hand held electric fat liquoring gun of claim 1 wherein, The main oil passage is connected with an oil pressure sensor.

9. A lubrication pump, comprising: a pump head assembly; an oil tank; characterized in further comprising a large displacement handheld electric grease gun detachably connected to the outside of the oil tank, the large displacement handheld electric grease gun comprising: a housing including a handheld handle and a grease injection head; a battery; a grease storage cylinder; a drive module including a speed reducer motor and a transmission mechanism, the transmission mechanism including a worm gear mechanism and at least two sets of crank slider mechanisms, each crank slider mechanism including a rotating pair, a connecting rod, and a slider, the rotating pair including a rotating crankshaft vertically arranged on a side of a turbine, one end of the connecting rod rotatably assembled on the rotating crankshaft via a sleeve, and the other end hingedly connected to the slider; a grease pumping module including a plunger pair corresponding to each crank slider mechanism, the plunger pair including a valve body, a plunger valve core, and a one-way valve, the valve body having a valve cavity in which the plunger is slidingly and sealingly assembled, and the one-way valve arranged at an outlet end of the valve cavity, the slider fixedly connected to the plunger valve core; a confluence block having a main oil passage in communication with the grease injection head and branch oil passages corresponding to each one-way valve, each branch oil passage in communication with the main oil passage.

10. The lubrication pump of claim 9, wherein, The speed reducer motor is a speed-adjustable motor, and the rotational speed of the speed reducer motor can be adjusted by a switch to control the grease output speed of the grease pumping module.

11. The lubrication pump of claim 9, wherein, Each rotating crankshaft has a connection point with the turbine located on the same circle of the turbine, each crank slider mechanism has the same structural size, and each plunger pair has the same structural size.

12. The lubrication pump of claim 11, wherein, Each rotating crankshaft has an end away from the turbine rotatably fitted with a mounting sleeve arranged on the housing.

13. The lubrication pump of claim 12, wherein, Each crank slider mechanism and plunger pair has two sets, and the two rotating crankshafts are coaxially arranged, and the two mounting sleeves are coaxially arranged.

14. The lubrication pump of claim 12, wherein, The crank slider mechanism and the plunger pair are at least three sets respectively, and each rotating crank shaft is uniformly distributed along the circumference of the turbine.

15. The lubrication pump of claim 9, wherein, The grease injection gun head is a multi-section telescopic pipe structure.

16. The lubrication pump of claim 9, wherein, An oil pressure sensor is connected to the main oil passage.

17. The lubrication pump of claim 9, wherein, A positioning and locking assembly is arranged on the oil tank for placing and positioning the large-displacement handheld electric grease injection gun.

18. The lubrication pump of claim 17, wherein, The positioning and locking assembly includes a metal hook for positioning and suspending the handheld electric grease injection gun and a clamp assembly for fixing the handheld electric grease injection gun.

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