TWI582327B - Grease gun drive device - Google Patents

Description

Grease gun drive

The present invention relates to a grease gun, and more particularly to a grease gun driving device.

A conventional electric grease gun internally drives a piston rod to reciprocate through a complicated gear structure, a slider, and the like to push the lubricating oil. The user will find that the electric grease gun is bulky and heavy, and it is inconvenient to hold for a long time, and since the lubricating oil is pushed through only a single piston rod, the oil discharge process is intermittent and the oil cannot be continuously supplied.

In order to provide the function of continuous oil supply, the patent TWI302973 discloses an electric grease gun double cam type transmission oil discharge device 1, which comprises a body 11, a double cam device 12 and a driving device 13. The double cam device 12 includes a coupling post 121 disposed on the body 11 , a driven gear 122 that is disposed on the coupling post 121 , and an eccentric cam 123 disposed on two sides of the driven gear 122 . The coupling frame 124 on both sides of the driven gear 122 and respectively located outside the eccentric cam 123, and the piston rod 125 respectively coupled with the coupling frame 124. The driving device 13 includes a motor 131 and a driving gear 132 disposed on the motor 131. The driving device 13 is in contact with the double cam device 12 at an angle by the driving gear 132. Therefore, the driving device 13 and the double cam device 12 occupy a space in two directions, which is disadvantageous for storage. Moreover, the double cam device 12 includes a plurality of components, and the structure is complicated, which makes assembly inconvenient and is not easy to be miniaturized.

Accordingly, it is an object of the present invention to provide a driving device for a grease gun which is simple in assembly, light in weight, and excellent in oil discharge efficiency.

Therefore, the driving device of the grease gun of the present invention is suitable for a grease gun and can be installed in a storage tank containing lubricating oil.

The grease gun drive includes an end cap and a power unit.

The end cover includes a cover body having an oil outlet, two oil injection passages spaced apart from each other and communicating with the oil outlet hole, and an open end provided for the oil storage tank, the end cover and the oil storage tank Around defining a chamber that connects the oil fill channels.

The power unit includes two pushing rods respectively disposed on the cover body and the chamber and slidably disposed on the oil filling passages, a rotating member having a cam surface, and a rotating member for driving the rotating member The drive source for the direction of rotation.

The pushing rod abuts against the cam surface of the rotating member, and as the rotating member rotates, the pushing rod is driven by the cam surface to reciprocate in the advancing direction, and the lubricating oil is alternately pushed into the oiling And then flow to the oil hole.

The effect of the invention is that: with the rotation of the rotating member, the push rods alternately move, and then push the lubricating oil to achieve the effect of continuous oil discharge, and only a small number of components can be achieved by linkage, and can be simplified. Assembly, weight reduction, and easier operation.

Referring to Figures 2 and 3, an embodiment of the driving device 2 for a grease gun of the present invention can be installed in an oil storage tank 21 containing lubricating oil, as shown in Figure 10.

The grease gun driving device 2 includes an end cap 3 and a power unit 4.

Referring to FIGS. 3 and 4 , the end cap 3 includes a cover 30 and two check valves 38 .

The cover body 30 has a base wall 31, a surrounding wall 32 extending outward from the annular edge of the base wall 31, an oiling portion 33 spaced apart from the base wall 31 and respectively connected to the surrounding wall 32, and a sliding portion 34. An oil outlet hole 35 opened in the base wall 31, and an open end 36 provided in the direction away from the base wall 31 for the oil storage tank 21. The cover 30 and the oil storage tank 21 define a chamber 37.

The oil filling portion 33 has two oil injection passages 331 which are spaced apart from each other, and two valve passages 332 which are opened at parallel intervals and communicate with the oil injection passages 331 respectively, as shown in FIG. Each oil injection passage 331 has a communication hole 333 adjacent to the valve passage 332 and communicating with the oil outlet hole 35, and an end of the oil injection passage 331 away from the valve installation passage 33 communicates with the chamber 37. The sliding portion 34 has two sliding passages 341 which are opened corresponding to the oil filling passages 331. The sliding lanes 341 are spaced apart from each other and penetrate the sliding portion 34 in a pushing direction X to communicate with the chamber 37. The valve channel 332 on the same side, the oil injection channel 331 and the sliding channel 341 are sequentially arranged along the advancement direction X. In this embodiment, each of the sliding lanes 341 is provided with an annular gasket 342, which is also referred to as a bushing.

The check valves 38 are disposed on the valve channels 332, respectively. Each check valve 38 has a ball 381 movably blocking one of the communication holes 333, an elastic member 382, and a valve cover 383 fixed to the cover 30. One end of the elastic member 382 abuts against the valve cover 383, and the other end pushes against the ball 381 in the advancing direction X.

The power unit 4 includes two push rods 41 , two push springs 42 , a rotating member 43 , a mask 44 disposed outside the rotating member 43 , and a driving source 45 .

Each of the push rods 41 has a shaft 411 extending parallel to the advancement direction X, and a stop ring 412 disposed on the shaft 411. The shaft 411 has a pushing end 413 for pushing the lubricating oil and a contact end 414 opposite to the pushing end 413. The pushing end 42 is inserted into the shaft 411 by the pushing end 413. The pushing end 413 of the pushing rod 41 is sequentially passed through the sliding path 341 on the same side, passes through the chamber 37, and The shaft 411 is driven to be slidably disposed on the oil filling passage 331 on the same side. The push rod 41 penetrates the sliding path 341 to be in close contact with the annular gasket 342, and prevents lubricating oil from seeping out from the sliding path 341. The contact end 414 of the push rod 41 abuts against the rotating member 43.

The thrust springs 42 respectively push against the stop rings 412 and the end caps 3 to hold the contact ends 414 against the rotating member 43.

Referring to Figures 4 and 5, the rotating member 43 is hollow and has a cam surface 430 distributed around the direction of advancement X. The cam surface 430 has a pushing surface 431, a returning surface 432, a buffering surface 433 and an oil returning surface 434 respectively between the pushing surface 431 and the returning surface 432. The cam surface 430 is defined as a high point adjacent the end cap 3 and a low point away from the end cap 3. In the present embodiment, the cushioning face 433 is at a high point, and the oil returning face 434 is at a low point. The pushing surface 431 and the highest portion of the returning surface 432 respectively engage the buffering surface 433, and the pushing surface 431 and the lowest portion of the returning surface 432 respectively engage the oil returning surface 434.

Referring to FIG. 5 to FIG. 7 , the driving source 45 has an output shaft 451 for the rotating member 43 to drive the rotating member 43 to rotate about the propulsion direction X. In the present embodiment, the rotating member 43 is rotated in the direction of the arrow shown in FIG.

The push rods 41 abut against the cam faces 430 of the rotating member 43, respectively. As the rotating member 43 rotates, the push rods 41 reciprocally reciprocate in the advancing direction X, respectively. Line A and line B in Fig. 6 respectively indicate the stroke change of the two push rods 41 moving one time, and the stroke indicates the proximity distance of any push rod 41 in the advancing direction X, starting from the low point of the cam surface 430. The value, to the high point of the cam surface 430, is the maximum moving distance value, and the angle represents the revolving angle of the rotating member 43, thereby indicating that the rotating member 43 corresponds to the moving position of the pushing rod 41 every 360 degrees. It should be noted that, in this embodiment, the travel time of any push rod 41 around the push-out surface 431 is equal to another push rod 41 sequentially winding the buffer surface 433, the returning surface 432 and the oil returning surface. 434 total travel time. In the present embodiment, any of the push rods 41 is driven by the cam surface 430 to move at a constant speed in the advancement direction X. The curvature of the face portion 431 is designed to enable the push rods 41 to feed the oil at an equal rate, so that the amount of oil flows out at a steady rate, but is not limited thereto.

Referring to FIG. 7 to FIG. 9, a push rod 41 is driven along the push-out surface 431 to enter the corresponding oil fill passage 331 in the advancement direction X, and the lubricating oil in the chamber 37 is pushed into the oil fill passage 331; A push rod 41 slides along the direction of the retracting face 432 to slide the corresponding oil fill passage 331 in the advancement direction X. The contact end 414 of one of the push rods 41 passes through the buffering portion 433, and the pushing end 413 of the same push rod 41 is held in the corresponding oil filling passage 331. The ball 381 of the check valve 38 is moved back. The communication hole 333. The contact end 414 of one of the push rods 41 passes through the oil returning surface 434, and the pushing end 413 of the same push rod 41 is away from the corresponding oil filling passage 331, waiting for the lubricating oil to flow from the chamber 37 into the oil filling passage 331.

The actuation of the push rods 41 is illustrated by a half-cycle stroke, respectively, and the push rod 41 located at the lower side in the drawing is away from the corresponding oil fill passage 331 and partially located in the chamber 37. As the rotating member 43 rotates, the pushing rod 41 is driven along the pushing surface portion 431 to extend into the oil filling passage 331 along the pushing direction X, and the pushing end 413 pushes the lubricating oil located in the chamber 37 into the oil filling portion. In the passage 331, the lubricating oil is squeezed and pushed against the check valve 38, so that the ball 381 is retracted from the communication hole 333, so that the lubricating oil can pass through the oil outlet hole 35. In the stroke in which the push lever 41 moves along the push-out surface portion 431, oil supply can be continued.

While the push lever 41 moves along the push-out surface 431, correspondingly, referring to the push lever 41 located above in FIGS. 7 to 9, the contact end 414 of the push lever 41 moves to the buffer face 433, The lubricating oil is no longer pushed, and the pressure in the oil filling passage 331 is gradually decreased after the lubricating oil gradually flows out of the oil outlet hole 35, so that the elastic force of the elastic member 382 of the check valve 38 pushes the ball 381 back to the communication hole. 333, preventing lubricating oil from flowing back from the oil outlet hole 35. The contact end 414 moves to the returning face 432, and the pushing spring 42 pushes against the blocking ring 412, so that the contact end 414 abuts against the returning face 432 and withdraws from the oil filling channel 331. Next, the push rod 41 is moved to the oil returning surface 434, and thus temporarily held in the chamber 37, and the lubricating oil gradually flows into the chamber 37 while the oil filling passages 331 are in communication with the chamber 37. The oil filling passage 331 performs an operation of replenishing oil.

With the rotation of the rotating member 43, each of the push rods 43 exchanges the above-mentioned actions, and each of the strokes is completed for one week, and then the next one-week stroke is alternately cycled, so that the two push rods 41 are successively pushed to each other to achieve continuous. The effect of oil.

Referring to FIG. 2 and FIG. 10, the present invention can be applied to a grease gun 22, the power unit 4 is disposed on the grease gun 22, and the end cap 3 protrudes from the grease gun 22 and is provided with the oil storage tank 21 and a The pressure valve 23 is assembled, and the oil outlet 35 is connected to an oil guiding tube 24. The grease gun 22 supplies electric power to the driving source 45 to drive the components of the power unit 4, thereby continuously pumping the lubricating oil of the oil storage tank 21 to the oil guiding pipe 24 for subsequent use.

Through the above description, the advantages and effects of the driving device 2 of the grease gun of the present invention are listed below:

1. In the process in which one of the push rods 41 pushes the lubricating oil, the other push rod 41 exits the oil fill passage 331 to inject new lubricating oil, preparing for the next oil discharge, and the action of the two push rods 41. Alternating with each other, the lubricating oil can be continuously pushed to achieve the effect of continuous oil discharge, and the rotating member 43 can be matched to smoothly carry out the oil discharging operation to improve the oil discharging efficiency.

Second, the invention can smoothly achieve the effect of continuously pushing the lubricating oil with a small number of components and a simple linkage manner, reducing the volume and weight, making the product lightweight, and reducing the burden of long-term use of the user.

3. The design of the check valve 38 cooperates with the ingenuity of the buffering surface 433 to give the check valve 38 a time to close the communication hole 333, thereby avoiding backflow of lubricating oil and ineffective work. Similarly, the oil return face 434 gives the lubricating oil a sufficient time to pass into the oil fill passage 331 to help provide sufficient oil output to perform the action more efficiently.

In summary, the present invention achieves continuous oil discharge through the above-mentioned members, and is more convenient and convenient to use, so that the object of the present invention can be achieved.

The above is only the embodiment of the present invention, and the equivalent equivalent changes and modifications made by the content of the patent application and the contents of the patent specification are still in the present invention. Within the scope of the invention patent.

1‧‧‧Electric grease gun double cam type transmission oil discharge device
11‧‧‧Ontology
12‧‧‧Double cam gear
121‧‧‧ binding column
122‧‧‧ driven gear
123‧‧‧Eccentric cam
124‧‧‧ binding box
125‧‧‧ piston rod
13‧‧‧ drive
131‧‧‧Motor
132‧‧‧ drive gear
2‧‧‧ grease gun drive
21‧‧‧ oil storage tank
22‧‧‧ grease gun
23‧‧‧pressure valve
24‧‧‧Tube
3‧‧‧End cover
30‧‧‧ cover
31‧‧‧
32‧‧‧ Surrounding wall
33‧‧‧Injection Department
331‧‧‧ oil filling
332‧‧‧ valve set
333‧‧‧Connected holes
34‧‧‧Sliding Department
341‧‧‧Sliding Road
342‧‧‧Ring gasket
35‧‧‧ oil hole
36‧‧‧Open end
37‧‧‧ chamber
38‧‧‧ check valve
381‧‧‧ sphere
382‧‧‧Flexible parts
383‧‧‧ bonnet
4‧‧‧Power unit
41‧‧‧Pushing rod
411‧‧‧ shaft
412‧‧‧stop ring
413‧‧‧Pushing end
414‧‧‧Contact end
42‧‧‧Pushing spring
43‧‧‧Rotating parts
430‧‧‧ cam surface
431‧‧‧ Launched a face
432‧‧‧Return face
433‧‧‧ cushioning face
434‧‧‧ oil back face
44‧‧‧ mask
45‧‧‧Drive source
451‧‧‧ Output shaft

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a partial perspective view showing an electric grease gun double cam type transmission oil discharge device disclosed in the patent TWI302973; 2 is a perspective view showing an embodiment of a driving device for a grease gun of the present invention; FIG. 3 is an exploded perspective view of the present embodiment; FIG. 4 is a partial cross-sectional view taken along line IV-IV of FIG. FIG. 6 is a schematic view showing the stroke of the two push rods of the present embodiment fed back and forth in a propulsion direction; FIG. 7 is along the line VII- in FIG. Figure 7 is a view similar to Figure 7, illustrating the rotating member of the embodiment driving the two push rods; Figure 9 is a view similar to Figure 8 illustrating the rotating member of the embodiment continues The push rods are driven; and FIG. 10 is a partial exploded view illustrating the application of the present embodiment to a grease gun.

2‧‧‧ grease gun drive

3‧‧‧End cover

30‧‧‧ cover

31‧‧‧

32‧‧‧ Surrounding wall

35‧‧‧ oil hole

38‧‧‧ check valve

4‧‧‧Power unit

43‧‧‧Rotating parts

44‧‧‧ mask

45‧‧‧Drive source

Claims (9)

The utility model relates to a grease gun driving device, which is suitable for a grease gun and can be installed in a lubricating oil tank containing a lubricating oil. The driving device of the grease gun comprises: an end cover comprising a cover body, the cover body having an out An oil hole, a gas injection passage that is spaced apart from each other and communicates with the oil outlet hole, and an open end provided for the oil storage tank, the end cover and the oil storage tank surround a chamber defining a gas injection passage; and a chamber The power unit includes two driving rods respectively disposed on the cover body and the chamber and slidably disposed on the oil filling passages, a rotating member having a cam surface, and a driving member for driving the rotating member a driving source that rotates in a direction, the pushing rod abuts against the cam surface of the rotating member, and as the rotating member rotates, the pushing rod is driven by the cam surface to reciprocate in the advancing direction, and the rotating will be lubricated The oil is pushed into the oil fill passages and flows to the oil outlet. The driving device for a grease gun according to claim 1, wherein the cam mask has a pushing surface and a returning face, and as the rotating member rotates, a pushing rod is driven along the pushing portion along the pushing The direction enters the corresponding oil filling passage, and the lubricating oil in the chamber is pushed into the oil filling passage, and the other pushing rod is driven along the backward moving surface to slide out the corresponding oil filling passage in the pushing direction. The driving device of the grease gun of claim 2, wherein the cam surface further has an oil returning surface between the pushing surface and the returning surface, wherein a pushing rod abuts the oil returning surface, The push rod is remote from the corresponding oil fill passage, waiting for the lubricating oil to flow from the chamber into the oil fill passage. The driving device of the grease gun of claim 3, wherein each of the oiling props has a communication hole communicating with the oil outlet, the end cover further comprising two check valves disposed on the cover body, the backstop The valves respectively restrict opening and closing of the communication holes to prevent backflow of lubricating oil. The driving device of the grease gun of claim 4, wherein each check valve has a ball that is movably blocked in one of the communication holes, an elastic member, and a valve cover fixed to the cover. One end of the elastic member abuts against the valve cover, and the other end pushes against the ball in the advancing direction. The driving device for a grease gun according to claim 4, wherein the cam surface further has a buffering portion between the pushing surface portion and the returning surface portion, wherein a pushing rod passes through the buffering portion, the pushing rod Holding the corresponding oil injection passage, the check valve moves to block the communication hole, and a push rod passes through the oil returning surface, the push rod is away from the corresponding oil filling passage, waiting for lubricating oil to flow from the chamber Filling line. The driving device of the grease gun according to claim 6, wherein the travel time of any of the push rods around the push-out face is equal to the total of the other push rods sequentially around the buffer face, the return face and the oil return face. Schedule time. The driving device of the grease gun of any one of claims 1 to 7, wherein each of the push rods has a stop ring, and the power unit further includes two pushers respectively pushing the stop rings and the end caps Push the spring. The driving device for a grease gun according to any one of claims 1 to 7, wherein the cover further has a base wall, a surrounding wall extending outward from the rim of the base wall, and spaced along the advancing direction An oiling portion and a sliding portion are provided, the oiling portion has two oil filling passages which are spaced apart from each other in the driving direction, and the sliding portion has two corresponding oil filling passage intervals corresponding to each other and is respectively provided for sliding of the pushing rods The slippery road.