Pneumatic grease filling gun

Abstract

The utility model provides a pneumatic type grease filling gun which comprises a barrel body, a front end cap is arranged at the front end of the barrel body, a grease outlet guide pipe extends out of the front end cap, a rear end cap is arranged at the rear end of the barrel body, and a telescopic air bag used for moving grease is arranged in the barrel body. And no empty beating is generated, the structure is simple, and the occupied space is small.

Description

Technical Field

[0001] The utility model belongs to the field of grease guns, and in particular relates to a pneumatic grease filling gun. Background Art

[0002] During the use of mechanical equipment, friction between the moving parts will cause wear of the mechanical parts. Therefore, in order to reduce this part of the wear, we need to frequently add lubricants such as lubricating oil or butter between these mechanical parts to reduce friction and thus reduce wear. The traditional grease gun is mainly composed of a handle, a gun head, a gun barrel and a handle. Such a grease gun usually discharges oil through a plunger at the gun head. If there is air in the oil chamber and it gathers at the plunger of the gun head, the grease gun will not be able to discharge oil, which will reduce work efficiency.

[0003] The utility model patent with application number 201220052363.6 discloses a hydraulic grease gun, which injects hydraulic oil into the cylinder through the hydraulic oil cylinder, and the hydraulic oil pushes the piston body to move forward, and the piston body squeezes the butter in the grease cylinder body and injects it into the grease inlet of the equipment from the grease outlet. This grease gun does not need a plunger structure to discharge oil, but it needs to leave space in the cylinder of this grease gun for the piston to move, resulting in a longer length and a more complicated structure of the grease gun. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a pneumatic grease filling gun.

[0005] The purpose of the utility model is achieved in the following ways:

[0006] A pneumatic grease filling gun comprises a barrel 1, a front end cap 11 is arranged at the front end of the barrel 1, the front end cap 11 extends outwardly from an oil outlet conduit 3, a rear end cap 12 is arranged at the rear end of the barrel 1, and a retractable air bag 2 for moving grease is arranged inside the barrel 1.

[0007] In the pneumatic grease filling gun, one end of the retractable airbag 2 close to the rear end cap 12 is fixed, and the other end is movable for filling or sucking grease.

[0008] In the pneumatic grease filling gun, the movable end of the telescopic airbag 2 is fixedly connected to the hard rubber plate 21 , and the outer periphery of the hard rubber plate 21 abuts against the inner periphery of the cylinder 1 .

[0009] In the pneumatic grease filling gun, the fixed end of the retractable airbag 2 is provided with an outer edge 22 extending out of the barrel 1, the outer diameter of the outer edge 22 is larger than the inner diameter of the barrel 1, and the outer edge 22 is located between the rear end cap 12 and the barrel 1.

[0010] In the pneumatic grease filling gun, the rear end cap 12 is provided with an air inlet and outlet 4 which are connected to the retractable air bag 2.

[0011] In the pneumatic grease gun, the barrel 1 and the front end cap 11, the barrel 1 and the rear end cap 12, and the oil outlet conduit 3 and the front end cap 11 are all connected by threads.

[0012] Compared with the prior art, the utility model uses a telescopic air bag to fill and inject butter, does not produce empty shots, has a simple structure, and occupies little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is one of the schematic diagrams of the structure of the utility model;

[0014] Figure 2 This is the second schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the present utility model, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0017] A pneumatic grease filling gun comprises a barrel 1, a front end cap 11 is arranged at the front end of the barrel 1, the front end cap 11 extends outwardly to an oil outlet conduit 3, a rear end cap 12 is arranged at the rear end of the barrel 1, and a retractable airbag 2 for moving grease is arranged inside the barrel 1. The front end cap 11 and the rear end cap 12 are used to seal the barrel 1. When the retractable airbag expands 2, the grease is pushed out from the oil outlet conduit 3 to fill the grease. When the retractable airbag contracts 2, negative pressure is generated inside the barrel, and the grease is sucked into the barrel 1. The contracted airbag occupies little space, which can effectively reduce the volume of the grease gun.

[0018] In the pneumatic grease filling gun, one end of the retractable airbag 2 close to the rear end cap 12 is fixed, and the other end moves to fill or absorb the butter. The retractable airbag 2 selects a bellows structure, and when expanding or contracting, one end is fixed, and the other end moves to fill or absorb the butter. During the contraction of the retractable airbag 2, the moving end moves toward the rear end, the pressure at the front end of the cylinder 1 decreases, and the butter is sucked into the cylinder 1; when the retractable airbag 2 expands, the moving end moves toward the front end to squeeze out the butter.

[0019] In the pneumatic grease filling gun, the movable end of the retractable airbag 2 is fixedly connected to a hard rubber plate 21, and the outer periphery of the hard rubber plate 21 abuts against the inner periphery of the cylinder 1. The hard rubber plate 21 plays a sealing role, preventing the grease from leaking to the rear end and entering between the airbag and the cylinder 1 when the airbag is expanded; it can also prevent the front end from leaking when the airbag is contracted, causing the problem that the air pressure is not low enough and the grease cannot be sucked in.

[0020] The thickness of the hard rubber plate 21 is preferably 20-30 mm, which has the advantage that the columnar body is thicker and is less likely to be skewed during movement.

[0021] In the pneumatic grease filling gun, the fixed end of the telescopic airbag 2 is provided with an outer edge 22 extending out of the barrel 1, the outer diameter of the outer edge 22 is larger than the inner diameter of the barrel 1, and the outer edge is located between the rear end cap 12 and the barrel 1. When the rear end cap is mounted on the barrel, the outer edge is located between the rear end cap 12 and the barrel 1, and the bottom of the rear end cap 12 and the barrel end squeeze the outer edge, and the end of the telescopic airbag close to the rear cover is fixed by squeezing the outer edge, and the telescopic airbag 2 is sealed at the same time to prevent the airbag from leaking.

[0022] In the pneumatic grease filling gun, the rear end cap is provided with an air inlet and outlet 4 connected to the retractable air bag 2. The air inlet and outlet 4 can be selected to have the same structure as the tire valve core, and can be used for air intake or air discharge when the air pipe is inserted, and automatically sealed when the air pipe is unplugged. The air inlet and outlet 4 can be connected to an air pump or an air intake pump. When the air pump is connected, the air bag contracts to suck the grease; when the air intake pump is connected, the air bag expands to add the grease. In addition, a longer air pipe can be used to realize remote control of oil suction or oil filling.

[0023] like Figure 2 As shown, the air inlet and outlet 4 can be integrally formed with the retractable airbag 2, and the opening on the rear end cap 12 allows the air inlet and outlet 4 to extend out, which has the advantage of better sealing of the airbag.

[0024] In the pneumatic grease gun, the barrel 1 and the front end cap 11, the barrel 1 and the rear end cap 12, and the oil outlet conduit 3 and the front end cap 11 are all connected by threads. The outer walls at both ends of the barrel 1 are provided with threads, and the inner walls of the front end cap 11 and the rear end cap 12 are also provided with corresponding threads, and the barrel 1 can be sealed by tightening at both ends.

[0025] The use process of the utility model is as follows: first assemble the butter filling gun, first install the retractable airbag 2, and install it from the rear end to the front end, with the hard rubber plate 21 in front and the outer edge 22 in the back, and all parts except the outer edge 22 are inserted into the cylinder 1; then screw on the rear cover cap 12, so that the bottom part of the rear cover cap 12 and the wall part of the cylinder 1 tighten the outer edge 22 to fix and seal the airbag. When using, connect the air inlet and outlet 4 to the air intake pump, expand the retractable airbag 2 to the maximum, that is, move the hard rubber plate 21 to the front end; then connect the air inlet and outlet 4 to the vacuum pump, insert the front end of the cylinder 1 into the butter, turn on the vacuum pump, and the airbag contracts to absorb the butter; after the oil filling is completed, screw on the front end cap 11 and the oil outlet conduit 3, connect the air inlet and outlet 4 to the air intake pump, and then the butter can be filled.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A pneumatic grease filling gun, comprising a barrel (1), a front end cap (11) being arranged at the front end of the barrel (1), the front end cap (11) extending outwardly to form an oil outlet conduit (3), and a rear end cap (12) being arranged at the rear end of the barrel (1), characterized in that: A retractable air bag (2) for moving butter is arranged inside the cylinder (1).

2. A pneumatic grease filling gun as claimed in claim 1, characterized in that: One end of the retractable airbag (2) close to the rear end cap (12) is fixed, and the other end is movable for filling or sucking butter.

3. A pneumatic grease filling gun as claimed in claim 2, characterized in that: The movable end of the telescopic airbag (2) is fixedly connected to a hard rubber plate (21), and the outer periphery of the hard rubber plate (21) abuts against the inner periphery of the cylinder (1).

4. A pneumatic grease filling gun as claimed in claim 3, characterized in that: The fixed end of the telescopic airbag (2) is provided with an outer edge (22) extending out of the cylinder (1); the outer diameter of the outer edge (22) is greater than the inner diameter of the cylinder (1); and the outer edge (22) is located between the rear end cap (12) and the cylinder (1).

5. A pneumatic grease filling gun as claimed in claim 4, characterized in that: The rear end cap (12) is provided with an air inlet and outlet (4) which are in communication with the retractable air bag (2).

6. A pneumatic grease filling gun as claimed in claim 1, characterized in that: The cylinder (1) and the front end cap (11), the cylinder (1) and the rear end cap (12), and the oil outlet conduit (3) and the front end cap (11) are all connected via threads.

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