Rod type grease gun head

Abstract

A rod type grease gun head relates to the technical field of lubricating and maintaining tools for engineering vehicle mechanical equipment and comprises a lengthened sleeve containing a gap type filter element and a gun rod internally provided with a cylinder, the gap type filter element movably matched with the lengthened sleeve is arranged in the lengthened sleeve, and the middle of the gap type filter element is composed of four rectangular planes. Each two opposite planes respectively form an inlet and outlet plane oil channel, two ends of each inlet and outlet plane oil channel are wedge-shaped inclined planes which form an angle of 90 degrees, the wedge-shaped inclined planes at the two ends are respectively connected with the four opposite planes, and the other ends of the two planes are respectively provided with a semi-circular truncated cone which can effectively prevent impurities from entering a working friction surface and blocking a small hole of a gun head. A cylindrical conical gun tip with the front end being of a conical step structure is installed in an oil outlet in the front end of the gun barrel, a hole in the front end of the gun barrel is in an annular closing-up shape, the annular closing-up can enable the conical gun tip in the hole in the front end of the gun barrel to be in butt joint with a small hole in the head of the grease fitting to achieve the guiding, positioning and centering effects, and meanwhile the conical gun tip of the gun head is prevented from being collided and damaged.

Description

Technical Field

[0001] The utility model relates to a rod-type grease gun head used in conjunction with a grease gun, belonging to the field of tools for lubricating and maintaining various engineering vehicles and mechanical equipment. Background Art

[0002] Various engineering vehicles, mechanical equipment, etc. need to use grease guns to add grease (lubricating oil) to the mechanical friction surface through the grease nozzle installed on the equipment through the grease gun head to reduce mechanical wear. At present, the commonly used gun heads are mainly flat head three-claw clamping type and pointed nozzle type. The disadvantages of the clamping type are that there are many parts, complex structure, high cost, large size, inconvenient operation, poor sealing, poor accessibility to the grease nozzle in narrow parts, and the grease nozzle head is easy to break during work. It is not easy to dredge after the gun head is blocked; the disadvantage of the pointed nozzle type is that the gun nozzle tip is not easy to quickly align with the grease nozzle oil inlet hole (both sizes are very small) during maintenance and lubrication, the work efficiency is low, it is very inconvenient to use, and the gun head is easy to be damaged by bumping during work and is easily blocked by impurities in the lubricating oil. Because the unused grease is stored in the workplace and added to the grease gun body, it is easy to mix with impurities such as sand and stone, causing the gun head to be blocked during work maintenance. It is often necessary to clean and dredge. At the same time, impurities enter various sliding friction surfaces and easily cause various abnormal wear, which brings inconvenience to maintenance and use, affecting work efficiency and abnormal wear of machinery. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a new type of rod-type grease gun head. It has the characteristics of simple structure, few parts, low cost, small size, good sealing performance of the gun head, and is strong and durable. At the same time, it has the function of filtering impurities in grease (lubricating oil). The gun head is small in size and has good accessibility to the grease nozzle in a narrow place. The front end oil outlet of the gun rod has a ring-shaped closing feature, which can conveniently guide and locate the conical gun tip in the front end oil outlet of the gun rod and the oil inlet hole of the grease nozzle to quickly align and protect the gun head tip from being easily damaged by bumps during work. In view of the fact that various gun heads are prone to clogging in actual work, a gap-type filtering device is added and optimized (the filtering area is larger than the existing mesh sheet filter, no need to clean, simple maintenance, strong and durable), which has the function of preventing the gun head from being blocked and preventing impurities from entering the friction working surface to cause abnormal wear, thereby solving the problems raised in the above-mentioned background technology.

[0004] The utility model is realized by the following technical solutions:

[0005] A rod-type grease gun head comprises an extension sleeve (1) containing a slot-type filter element (2) and a gun rod (3) containing a cylinder (4). The extension sleeve (1) is provided with a slot-type filter element (2) that is movably matched therewith. The middle of the slot-type filter element (2) is composed of four rectangular planes, and the two opposing planes respectively form inlet and outlet plane oil passages (2-1). The two ends are wedge-shaped inclined planes (2-2) at 90 degrees to each other. The wedge-shaped inclined planes (2-2) at the two ends are respectively connected to two opposite planes of the four planes, and the other ends of the two planes respectively have a semi-circular cone (2-3). A cylinder (4) is arranged inside the front end oil outlet of the gun rod (3), and its front end is a conical gun tip with a conical step structure. A through hole (4-2) (hereinafter referred to as the conical gun tip 4-1) is arranged in the center of the conical gun tip. The cylinder (4) and the gun rod (3) are fitted by interference fit. The front end hole of the gun rod (3) is an annular closing (5). The inner diameter of the closing is slightly larger than the size of the grease nipple head. The conical gun tip (4-1) in the front end hole of the gun rod (3) and the small hole of the grease nipple head (both of which are very small and difficult to connect) can be quickly connected to play a guiding and positioning centering role (entering the closing is centering). After the annular closing (5) is inserted into the small hole of the grease nipple, the radial clearance at the position of the neck of the grease nipple becomes larger, so that the gun rod (3) can be swung to a certain working angle relative to the axis of the small hole of the grease nipple. The annular closing (5) also protects the conical gun tip (4-1) of the gun head to prevent it from being damaged by collision during work.

[0006] The beneficial effects of the utility model are:

[0007] The structure is simple, and the conical gun tip is made of one piece with the gun body. It matches the gun body beautifully and compactly, has a long service life, low cost, few parts, and small size. In view of the fact that various gun heads are prone to clogging by impurities in the oil in actual work, a gap filter element has been added and optimized (compared with the first generation). The conical gun tip of the gun barrel has a small diameter and good accessibility to the grease fittings on the working surfaces of various parts.

[0008] 1. The utility model combines the conical gun tip and the gun rod into an integrated rod-type gun head, which has fewer parts, small size, low cost, easy processing, matches the grease gun body, and is beautiful, compact and durable.

[0009] 2. The oil outlet at the front end of the gun barrel of the utility model is annularly closed, and the inner diameter is slightly larger than the head size of the standard grease nipple. The annular closing at the front end of the gun barrel can well guide and position the conical gun tip installed in its hole, quickly align the oil inlet hole of the grease nipple, and protect the conical gun tip of the gun head to prevent it from being damaged by bumps, thereby improving work efficiency and durability.

[0010] 3. The slit filter device composed of the utility model and the gun barrel has the function of filtering impurities in butter to ensure the cleanliness of grease and prevent the small hole of the conical gun tip of the gun head from being blocked. When the front end of the oil inlet of the slit filter element is blocked due to long-term accumulation of impurities, it is only necessary to remove the gun barrel and operate the grease gun pressure handle to squeeze out the butter together with the slit filter element and impurities to be squeezed out of the extension sleeve, and then scrape off the huge impurities on the two oil inlet planes of the slit filter element (no need to clean), and then install it back into the extension sleeve (because the two ends of the slit filter element have a wedge-shaped inclined surface staggered at 90 degrees, it can be installed back at will regardless of the front and back). It greatly reduces the probability of the small hole of the conical gun tip in the gun barrel being blocked and is better than the sheet filter. It is easy to operate and efficient, strong and durable, and easy to maintain, thereby achieving the purpose of easy use, reliable work, saving butter and reducing environmental pollution.

[0011] 4. The rod-type gun head of the utility model can be made by using the original gun rod with a few changes. Therefore, it is simple to make, low in production cost, beautiful, compact and durable. Its focus is on reliable operation and convenient use, preventing impurities in the oil from clogging the gun head and reducing mechanical wear caused by impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 , is a schematic diagram of a half-section structure of the utility model, wherein (1) an extended sleeve; (2) a slit filter element; (3) a gun rod; (4) a cylinder; (5) an annular closing

[0013] Figure 2 , is a schematic diagram of the structure of the slit filter element (2).

[0014] Figure symbols: plane oil channel 2-1, wedge-shaped inclined surface 2-2,

[0015] 2-3 semi-circular cones, 2-4 flat edges.

[0016] Figure 3 , is a schematic diagram of the structure of the cylinder (4).

[0017] Figure symbols: conical gun tip 4-1, through hole 4-2. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The working process of the rod-type grease gun head of the present invention is described in conjunction with the accompanying drawings. First, the rod-type grease gun head of the grease gun is aligned with the grease nozzle so that the grease nozzle head enters the annular closing opening (5) of the front end hole of the gun rod (3). The closing opening is slightly larger than the grease nozzle head, which can play a role in quickly guiding, positioning and centering the conical gun tip (4-1) in the front end hole of the gun rod (3) to the grease nozzle oil inlet hole (entering the closing opening means centering). The operator uses appropriate arm strength to push the grease gun together with the rod-type grease gun head integrally installed therewith toward the grease nozzle. Through the annular closing opening (5) at the front end of the gun rod (3), the conical gun tip (4-1) in the front hole of the gun head can be quickly and accurately pressed into the grease nozzle oil inlet hole. Then, the pressing handle on the grease gun body is operated to press the grease into the extension sleeve (1), and then enters two planar oil passages (2-1) (two opposite planar oil passages) that are connected to the wedge-shaped inclined surface (2-2) of the slit filter element (2) respectively. The front end of the two plane oil passages (2-1) has a semi-conical cone (2-3) at the oil outlet end, and the clearance between the semi-conical cone and the inner hole wall of the extension sleeve is much smaller than the clearance of the filtering plane corner (2-4), so the grease cannot pass through. The grease can only pass through the plane corner (2-4) between the two adjacent plane oil passages (2-1) (only one oil passage is described, and the other is the same on the opposite side). When the grease passes through the gap formed by the plane corner (2-4) and the inner hole wall of the extension sleeve (1), the impurity particles larger than the gap are filtered and blocked in the oil inlet plane oil passage, and then pass through the oil outlet passage formed by the other two opposite planes and the wedge-shaped inclined surface of the slit filter element (2) (because the two plane oil passages also have a semi-conical cone at the oil inlet end to block the grease from entering, and the oil outlet end has no semi-conical cone to become an oil outlet passage). The filtered grease can enter the gun rod (3) to the gun head, so that the grease is pressed into the working lubrication surface through the grease nozzle connected to the rod-type grease gun head.

[0019] Manufacturing process: The manufacturing process of the rod-type grease gun head is to slightly expand the inner hole of the front end face of the original gun rod on the lathe, and then press the cylinder with a conical gun tip into the inner hole of the gun rod oil outlet end for a certain distance and interference fit. The structure of the cylinder is a cylinder. The front end is a conical gun tip with a conical step. There is a through hole in the center. It can be processed by lathe, and then the front end of the gun rod oil outlet is closed into a ring. The ring is extruded by a specific mold. The extension sleeve is equipped with a slit-type strip square four-plane angular filter element that is dynamically matched with it. The four oil-receiving planes of the slit filter element can be processed by milling, or made of non-metal by a mold. The size of the gap between the flat edges of the strip filter element and the inner hole wall of the extension sleeve can adjust the filtration accuracy.

Claims

1. A rod-type grease gun head, characterized in that It consists of an extended sleeve (1) with a slot filter element (2) installed therein and a gun rod (3) with a cylinder (4) installed therein. The oil passage of the extended sleeve (1) is provided with a slot filter element (2) which is movably mounted therewith. The gun rod (3) is composed of a cylinder (4) with a conical gun tip (4-1) which is tightly mounted in the inner hole of the oil outlet at the front end of the gun rod (3). The front end hole of the gun rod (3) is annularly closed (5), and the inner diameter of the closed end is slightly larger than the size of the grease nipple head.

2. A rod-type grease gun head according to claim 1, characterized in that The cylindrical body (4) with the conical gun tip (4-1) is tightly fitted in the inner hole of the annular closing opening (5) of the oil outlet at the front end of the gun rod (3).

3. A rod-type grease gun head according to claim 1, characterized in that The middle of the slit filter element (2) is composed of four rectangular planes, and the two opposing planes form an inlet and outlet plane oil channel (2-1). The two ends are wedge-shaped inclined planes (2-2) at 90 degrees to each other. The wedge-shaped inclined planes (2-2) at the two ends are respectively connected to the two opposite planes of the four planes, and the other ends of the two planes are respectively provided with a semi-circular cone (2-3).

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