Self-lubricating structure of integrated striking tool

Abstract

The utility model relates to the technical field of beating tool lubrication, and discloses a self-lubricating structure of an integrated beating tool, which comprises a gun body, an inner cylinder arranged in the gun body, a firing pin slidably arranged in the inner cylinder, a piston I fixedly connected to the end part of the firing pin, a piston II fixedly connected to the end part of the piston I, and a piston rod fixedly connected to the end part of the piston II. The piston I and the piston II slide in the mode of being attached to the inner wall of the inner air cylinder, threads are arranged on the surfaces of the piston I and the piston II, the surfaces of the piston I and the piston II are coated with thread glue, the surfaces of the piston I and the piston II are sleeved with sealing rings and fixed through the thread glue, and a closed space is formed between the sealing rings arranged on the surfaces of the piston I and the piston II in a sleeving mode. The closed space is filled with lubricating oil to lubricate the sliding of the firing pin in the inner cylinder; and lubricating oil is completely evaporated and can lubricate the inner wall of the inner air cylinder only by oil vibrated out of the sponge body, so that the service life of the X-shaped sealing ring can be greatly prolonged, meanwhile, the end part of the firing pin is kept balanced when sliding close to the inner wall of the inner air cylinder, scratching and friction are prevented, and air leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lubrication of striking tools, in particular to a self-lubricating structure of an integrated striking tool. Background Art

[0002] The current air spring nailing tools at home and abroad are designed with sealing rings and support rings on the piston of the firing pin, and then lubricating oil is applied to the sealing ring. When the firing pin reciprocates and compresses the air in the cylinder, the sealing ring of the piston relies on the lubricating oil to lubricate the inner wall of the cylinder, thereby increasing the life of the sealing ring. The lubricating oil on the piston sealing ring will gradually flow to the bottom of the cylinder with the reciprocating friction.

[0003] Once the lubricating oil flows to the bottom of the cylinder, the piston will lose lubrication and its service life will be shortened. The inner wall of the cylinder will heat up rapidly due to friction, causing serious friction with the inner wall during the overall operation of the nail gun, resulting in jamming and even air leakage, which will cause the piston seal to be damaged by dry wear, resulting in the need to replace the seal prematurely and re-apply lubricating oil. Referring to patent number CN221792550U, after nailing experiments based on this patent, it was found that there are some shortcomings. An oil seal is provided behind the piston of this patent, and a space is designed between the piston and the oil seal to be filled with liquid lubricating oil, and during the reciprocating motion, the piston seal is damaged. During the nailing process, the lubricating oil evaporates. After the evaporation of the liquid lubricating oil decreases, the oil seal cannot maintain balance. In the process of reciprocating compressed air, the oil seal will tilt due to imbalance. After tilting, the edge of the oil seal will scratch the inner wall of the inner cylinder. After 100,000 nailing times, the CN221792550U design will have scratches on the inner wall of the inner cylinder caused by the tilted oil seal. After the scratches, the liquid lubricating oil will flow out faster through the scratches, causing the oil seal to tilt more and more, and the piston sealing ring to be scratched, resulting in high-pressure gas leakage, resulting in insufficient nailing force.

[0004] In view of this, the present invention solves the above technical problems by proposing a self-lubricating structure of an integrated striking tool. Utility Model Content

[0005] In response to the shortcomings of the above-mentioned background technology, the present invention provides a technical solution for the self-lubricating structure of an integrated striking tool. When the sponge body is assembled, the lubricating oil is filled and the sponge body will fully absorb the lubricating oil. When the lubricating oil evaporates after a large number of nailing times, the lubricating oil in the sponge body will be shaken out by the vibration of the nailing of the firing pin, thereby replenishing the evaporated lubricating oil. This can delay the problem of decreased lubrication effect caused by evaporation of the lubricating oil and keep the end of the firing pin balanced when sliding against the inner wall of the inner cylinder, preventing scratches and friction and avoiding air leakage, thereby solving the problems raised in the above-mentioned background technology.

[0006] The utility model provides the following technical solution: a self-lubricating structure of an integrated striking tool, comprising a gun body, an inner cylinder being provided inside the gun body, a firing pin being slidingly provided inside the inner cylinder, a piston I being fixedly connected to the end of the firing pin, a piston II being fixedly connected to the end of the piston I, both pistons I and II sliding along the inner wall of the inner cylinder, threads being provided on the surfaces of both pistons I and II and being coated with thread glue, sealing rings being sleeved on the surfaces of pistons I and II and being fixed by thread glue, a closed space being formed between the sealing rings sleeved on the surfaces of pistons I and II, and the closed space being filled with lubricating oil to lubricate the sliding of the firing pin inside the inner cylinder.

[0007] As a preferred technical solution of the present invention, a motor is installed inside the gun body, an incomplete wheel disc is fixed to the driving end of the motor, and partial teeth are provided on the surface of the striker close to the gun head.

[0008] As a preferred technical solution of the present invention, the motor drives the incomplete wheel to rotate and engage with part of the teeth on the surface of the striker, driving it to slide inside the inner cylinder to form air pressure inside the inner cylinder.

[0009] As a preferred technical solution of the present invention, the cross-sectional shape of the sealing ring is an X structure.

[0010] As a preferred technical solution of the present invention, four piston waist holes for oil injection are opened between the piston I and the piston II, and the piston waist holes are distributed in a circular pattern.

[0011] As a preferred technical solution of the present invention, a sponge is sleeved between the piston I and the piston II, and the diameter of the sponge is equal to the end of the piston waist hole, and the interior is in contact with the piston waist hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The piston waist hole can ensure that the problem of incomplete lubricating oil injection due to angle problems during assembly can be solved.

[0014] 2. When the sponge body is assembled through the sleeve, the lubricating oil is filled and the sponge body will fully absorb the lubricating oil. When the lubricating oil evaporates after the number of nailing increases, the lubricating oil in the sponge body will be shaken out by the vibration of the nailing of the striker, thereby replenishing the evaporated lubricating oil, which can delay the problem of decreased lubrication effect caused by the evaporation of the lubricating oil.

[0015] 3. When all the lubricating oil evaporates, the oil shaken out of the sponge can lubricate the inner wall of the inner cylinder, which can greatly extend the life of the X-type sealing ring. At the same time, the end of the striker can maintain balance when sliding against the inner wall of the inner cylinder, preventing scratches and friction and avoiding air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the internal structure of the inner cylinder;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the structure of the firing pin;

[0019] Figure 4 For this utility model Figure 3 A cross-sectional view of the firing pin;

[0020] Figure 5 This is a structural diagram of the utility model in which the sponge body is sleeved on the end of the waist hole of the piston.

[0021] In the picture: 1. Gun body; 2. Inner cylinder; 3. Incomplete wheel; 4. Firing pin; 5. Motor; 6. Piston waist hole; 7. Sponge body. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1:

[0024] See also Figure 1-5 As shown, a self-lubricating structure of an integrated striking tool includes a gun body 1, an inner cylinder 2 is provided inside the gun body 1, and is characterized in that: a striker 4 is slidably provided inside the inner cylinder 2, a piston I is fixedly connected to the end of the striker 4, a piston II is fixedly connected to the end of the piston I, and both pistons I and II slide along the inner wall of the inner cylinder 2, the surfaces of pistons I and II are provided with threads and coated with thread glue, sealing rings are provided on the surfaces of pistons I and II and are fixed by thread glue, a closed space is formed between the sealing rings provided on the surfaces of pistons I and II, and the closed space is filled with lubricating oil to lubricate the sliding of the striker 4 inside the inner cylinder 2;

[0025] As a specific embodiment of the present utility model, a motor 5 is installed inside the gun body 1, and an incomplete wheel disc 3 is fixed to the driving end of the motor 5, and the surface of the striker 4 is provided with partial teeth near the gun head; the motor 5 drives the incomplete wheel disc 3 to rotate and engage with the partial teeth on the surface of the striker 4, driving it to slide inside the inner cylinder 2 so that air pressure is formed inside the inner cylinder 2; the cross-sectional shape of the sealing ring is an X structure; four piston waist holes 6 for oil injection are opened between piston I and piston II, and the distribution state of the piston waist holes 6 is circumferential; a sponge 7 is sleeved between piston I and piston II, and the diameter of the sponge 7 is equal to the end of the piston waist hole 6, and the inside of 24 is in contact with the piston waist hole 6.

[0026] by Figure 4 For example, the upper and bottom parts of the striker 4 are designed with threads, the two threads are connected and coated with thread glue, the upper and bottom parts of the striker 4 are covered with X-shaped sealing rings, and a closed space is formed between the two X-shaped sealing rings, and then the space is filled with lubricating oil. During the process of reciprocating compressed air, the inner wall of the inner cylinder 2 is lubricated. Four circumferentially distributed piston waist holes 6 are designed at the end of the striker 4. When sliding inside the inner cylinder 2, the striker 4 piston reciprocates to compress the air. At this time, because there is a hard connection between the two pistons at the end of the striker 4, the evaporation of lubricating oil is reduced and there will be no tilting problem, so that the inner The inner wall of the cylinder 2 is provided with a circular sponge 7 in the middle when there is liquid lubricating oil between the two pistons. When the lubricating oil is filled during assembly, the sponge 7 will fully absorb the lubricating oil. When the lubricating oil evaporates after a large number of nailing times, the lubricating oil in the sponge 7 will be shaken out by the vibration of the nailing of the striker 4, thereby replenishing the evaporated lubricating oil, which can delay the problem of decreased lubrication effect caused by evaporation of the lubricating oil. Even if the lubricating oil is completely evaporated, the oil shaken out of the sponge 7 alone can lubricate the inner wall of the inner cylinder 2, which can greatly extend the life of the X-shaped sealing ring.

[0027] Operating principle: During operation, the motor 5 drives the incomplete wheel disc 3 to increase the torque, and then the incomplete wheel disc 3 engages with the piston waist hole 6 to move toward the rear of the cylinder to compress the pre-charged high-pressure air. When the air pressure is compressed to the bottom of the cylinder, the motor 5 continues to rotate to the notch of the incomplete wheel disc 3, and the striker 4 is pushed out by the high-pressure air to push out the air nail, completing a nailing operation.

[0028] It should be noted that, in this document, relational terms such as first and, second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device. At the same time, in the drawings of the present utility model, fill patterns are only used to distinguish layers and do not make any other limitations.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating structure of an integrated striking tool, comprising a gun body (1), wherein an inner cylinder (2) is provided inside the gun body (1), characterized in that: The inner cylinder (2) is provided with a striker (4) for sliding inside. The end of the striker (4) is fixedly connected to a piston I. The end of the piston I is fixedly connected to a piston II. Both pistons I and II slide along the inner wall of the inner cylinder (2). The surfaces of the pistons I and II are provided with threads and are coated with thread glue. The surfaces of the pistons I and II are covered with sealing rings and fixed by thread glue. A closed space is formed between the sealing rings provided on the surfaces of the pistons I and II, and the closed space is filled with lubricating oil to lubricate the striker (4) sliding inside the inner cylinder (2).

2. The self-lubricating structure of an integrated striking tool according to claim 1, characterized in that: A motor (5) is installed inside the gun body (1), an incomplete wheel disc (3) is fixed to the driving end of the motor (5), and a partial tooth is provided on the surface of the striker (4) near the gun head.

3. The self-lubricating structure of an integrated striking tool according to claim 2, characterized in that: The motor (5) drives the incomplete wheel disc (3) to rotate and engage with the partial teeth on the surface of the striker (4), driving it to slide inside the inner cylinder (2) so as to form air pressure inside the inner cylinder (2).

4. The self-lubricating structure of an integrated striking tool according to claim 3, characterized in that: The cross-sectional shape of the sealing ring is an X structure.

5. The self-lubricating structure of an integrated striking tool according to claim 4, characterized in that: Four piston waist holes (6) for oil injection are provided between the piston I and the piston II, and the piston waist holes (6) are distributed in a circumferential manner.

6. The self-lubricating structure of an integrated striking tool according to claim 5, characterized in that: A sponge (7) is sleeved between the piston I and the piston II, and the diameter of the sponge (7) is equal to the end of the piston waist hole (6), and the inner wall of the sponge (7) is in contact with the piston waist hole (6).

Images