JPH0143597Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a hand grease gun that manually supplies grease at high pressure.

(Prior Art) As shown in FIG. 3, in a conventional hand grease gun, a plunger pump 12 is integrally provided at the tip of a grease case 11, and a shaft is attached to a part of the pump body 13 of the plunger pump 12. The lower end of a link 15 is rotatably attached to the upper end of this link 15 by a fulcrum shaft 16, and the base end of a manual lever 17 is rotatably supported by a fulcrum shaft 16. The intermediate portion of the end side is connected to the load point shaft 1 at the protruding end of the plunger 18 of the plunger pump 12.
9.

Then, grip the force point part 20 on the tip side of the manual lever 17 together with the rear part 11a of the grease case,
By pressing toward the grease case 11, the manual lever 17 is rotated about the fulcrum shaft 16 to press the load point shaft 19 and push the plunger 18 into the pump body 13.

The grease is contained in a compressible cartridge, and this grease cartridge is fitted inside the grease case 11, and is constantly compressed by a built-in spring from the rear end of the case toward the pump 12. There is. Due to this compressive force, the grease in the grease cartridge is constantly pressurized to the grease suction port provided in the pump body 13.

Therefore, when the plunger 18 is raised, this grease suction port opens and the pump body 13
Grease is supplied inside the plunger 18.
When the pump is lowered, the grease suction port is closed by the plunger 18, and the grease is forced into the nozzle 21 through a check valve provided at the bottom of the pump body.

(Problem to be solved by the invention) This conventional hand grease gun has a load point axis 19.
is fitted in a fixed position on the manual lever 17. Therefore, the fulcrum axis 16, the load point axis 19, the force point part 2
Since the lever ratio determined by the positional relationship of 0 is constant, the stroke and discharge pressure of the plunger 18 are also determined to be approximately constant values.

On the other hand, this type of grease gun requires a relatively large discharge volume in the first half of filling the target object with grease to increase efficiency, and in the second half of filling the target object, the filling load increases. Discharge pressure is required.

The purpose of this invention is that when the discharge load is small, the stroke of the plunger is large and the amount of grease discharged is large.As the discharge load increases, the lever ratio of the manual lever is automatically changed to automatically adjust the discharge pressure of the plunger. The purpose of the present invention is to provide a simple hand grease gun that is highly popular.

[Structure of the idea]

(Means for Solving the Problems) In the present invention, a plunger pump 12 is integrally provided at the tip of a grease case 11, and a fulcrum shaft is connected to a part of the pump body 13 of the plunger pump 12 via a link 15. 16 is movably provided, the base end of a manual lever 17 is rotatably supported via this fulcrum shaft 16, and the intermediate portion on the base end side of the manual lever 17 is connected to the plunger 18 of the plunger pump 12. It is connected to the protruding end by a load point shaft 19, and by pressing the force point portion 20 on the tip side of the manual lever 17 toward the grease case 11 side, the manual lever 17 is rotated about the fulcrum shaft 16. In a hand grease gun that presses the load point shaft 19 and pushes the plunger 18 into the pump body 13, the manual lever 17 is provided with a slide portion 31 that extends substantially in the lever direction, and this slide portion 31 pushes the load point shaft 19. The manual lever 17 is slidably fitted into the load point shaft 19, and the manual lever 17 is elastically biased by a spring 35 in a direction in which the fulcrum shaft 16 is separated from the load point shaft 19.

(Function) In this invention, in the first half of filling the object with grease,
Since the plunger load is small, the fulcrum shaft 16 is held at the farthest position from the load point shaft 19 by the force of the spring 35. Therefore, the stroke of the plunger 18 is relatively large, and the amount of grease discharged is large, so that Grease can be filled efficiently. In addition, in the latter half of filling, the filling load of the object increases, so the manual lever 17 is pushed down against this high load, and if the angle between the slide part 31 and the plunger 18 becomes obtuse during the pushing down operation, the lever 1
7 slides against the spring 35, the fulcrum shaft 16 approaches the load point shaft 19,
Load point axis 19 and force point part 2 based on fulcrum axis 16
Since the lever ratio with respect to
The pressing force acting on the plunger 18 increases.
The discharge pressure will automatically increase.

(Example) Hereinafter, the present invention will be described in detail with reference to an example shown in FIGS. 1 and 2. Note that the same parts as in the conventional example shown in FIG. 3 are given the same reference numerals, and detailed explanation thereof will be omitted.

As shown in FIG. 1, a plunger pump 12 is integrally provided at the tip of the grease case 11, and a pump body 13 of this plunger pump 12
A fulcrum shaft 16 is movably provided through a link 15 in a part of the fulcrum shaft 16, and the base end of a manual lever 17 is rotatably supported via this fulcrum shaft 16. The intermediate portion is connected to the protruding end of the plunger 18 of the plunger pump 12 by a load point shaft 19, and by pressing the force point portion 20 on the tip side of the manual lever 17 toward the grease case side, the fulcrum shaft 16 is activated. This pump is similar to the conventional example shown in FIG. 3 in that the manual lever 17 is rotated at the center to press the load point shaft 19 and push the plunger 18 into the pump body 13.

Furthermore, as shown in FIG. 2, the manual lever 17 is provided with an elongated hole 31 serving as a sliding portion substantially in the lever direction, and this elongated hole 31 is slidably attached to the load point shaft 19. Spring receivers 33 and 34 are rotatably fitted to the load point shaft 19 and the mounting shaft 32 fitted to the base end of the manual lever 17, respectively. A compression spring 35 is interposed between the bodies 33 and 34.

The manual lever 17 is formed to have a shaped cross section, and the receiver 3 is placed in a hollow space inside the shape of the lever 17.
3, 34 and a spring 35 are provided. The spring receiver 33 is integrally provided with a protrusion 33a, into which one end of the spring 35 is fitted, and the spring receiver 34 is provided with a recess 34a.
The other end of the spring 35 is fitted into the spring 4a.

When filling an object such as a bearing with grease, in the first half of the filling, the grease easily enters the object and the plunger load is small, so the pressing force of the compression spring 35 causes the fulcrum to be Since the shaft 16 is always held at the farthest position from the load point shaft 19, and the distance between the two shafts 16 and 19 is maximum, the stroke of the plunger 18 is relatively large and the amount of grease discharged is also large. Thereby, the object can be efficiently filled with grease.

In addition, in the latter half of filling, the interior of the object is filled with grease and the plunger load increases, so the manual lever 17 is pushed down against this high load, and in the middle of the pushing down, the gap between the elongated hole 31 and the plunger 18 is When the angle becomes obtuse, the elongated hole 31 of the lever 17 slides to the right while the link 15 rotates clockwise about the shaft 14, and the lever 17 releases the compression spring 35.
The fulcrum shaft 16 moves to the right against the load point axis 1.
Approaching 9. In this way, the lever ratio of the load point axis 19 and the force point part 20 with respect to the fulcrum axis 16 (distance between the axis of the fulcrum shaft 16 and force point part 20 / fulcrum axis 1
6. The distance between the load point shafts 19) automatically increases, so even if the grip force on the force point section 20 is constant, the push force acting on the plunger 18 from the load point shaft 19 is reduced by the lever principle. The pressure increases and the stroke of this plunger 18 becomes smaller, but the discharge pressure automatically increases. This allows the grease to be powerfully filled into every corner of the object to be greased, such as a bearing.

Although the compression spring 35 is used in the embodiment described above, a tension spring may be provided on the right side of the load point axis 19.

[Effect of idea]

According to the present invention, as the load on the plunger increases, the sliding portion of the manual lever slides against the spring so that when the manual lever is pushed down, the fulcrum axis approaches the load point axis, and the lever ratio increases. becomes large, so when the plunger load is small, the stroke of the plunger is large and grease filling can be carried out efficiently, and when the plunger load becomes large, the automatic adjustment of the lever ratio increases the plunger discharge pressure. It is possible to perform powerful grease filling on the target object.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the hand grease gun of the present invention, Fig. 2 is a sectional view of its main parts, and Fig. 3 is a front view showing an embodiment of the hand grease gun of the present invention.
The figure is a front view of a conventional hand grease gun. 11... Grease case, 12... Plunger pump, 13... Pump body, 15... Link, 1
6... Fulcrum shaft, 17... Manual lever, 18... Plunger, 19... Load point axis, 20... Force point portion,
31...Slide part, 35...Spring.

Claims (1)

[Claim for Utility Model Registration] A plunger pump is integrally provided at the tip of the grease case, and a fulcrum shaft is movably provided through a link in a part of the pump body of this plunger pump, and this fulcrum shaft is The proximal end of the manual lever is rotatably supported via the manual lever, and the intermediate portion on the proximal end side of the manual lever is connected to the protruding end of the plunger of the plunger pump by a load point shaft, and the distal end of the manual lever In the hand grease gun, the manual lever is rotated around the fulcrum shaft to press the load point shaft and push the plunger into the pump body by pressing the force point portion on the side toward the grease case side. The lever is provided with a sliding portion substantially in the lever direction, this sliding portion is slidably fitted to the load point shaft, and the manual lever is moved by a spring in a direction in which the fulcrum shaft is spaced apart from the load point shaft. A hand grease gun characterized by being elastically energized.