Cylinder gas storage structure of pneumatic tool

Abstract

A cylinder gas storage structure of a pneumatic tool. The cylinder gas storage structure comprises a pneumatic tool body having a cylinder provided therein, and an operating gas chamber and a gas storage chamber, which can be in communication with each other, are provided inside the cylinder; a driving device is provided inside the pneumatic tool body; a driving shaft is connected to the driving device, and the driving shaft is provided with a gas storage driving member and a striker-pin-lifting driving member; the gas-storage driving member and the striker-pin-lifting driving member both rotate unidirectionally, and rotate in opposite directions; and a piston connecting rod, which is driven by the gas storage driving member to perform a reciprocating motion, is provided inside the gas storage chamber. The advantages of the cylinder gas storage structure of the pneumatic tool are: the structure is rational and compact, and the lifting of a striker pin or the gas storage for the cylinder is realized by means of forward and reverse rotations of the driving shaft, and the gas storage chamber is used to store gas for the cylinder, so that a firing force of the striker pin can be improved.

Description

Cylinder gas storage structure for pneumatic tool Technical Field

[0001] The utility model relates to the technical field of pneumatic tool manufacturing, in particular to a cylinder gas storage structure of a pneumatic tool. Background Art

[0002] Pneumatic tools are tools that use air pressure as a power source, such as pneumatic nail guns. Pneumatic nail guns use the air pressure in the gas tank to fire the firing pin, which then strikes the nail to eject the nail.

[0003] For example, the patent application with application number CN202320701616.6 and titled "Air Nail Gun and Its Nail Assembly" discloses an air nail gun, which includes an air cylinder, a piston, a nail rod, a nail block and a sealing plate. The piston is slidably installed in the air cylinder. The piston includes a ring body and a hollow extension tube with an open end. One end of the nail rod is connected to the nail block, and the other end of the nail rod is connected to the ring body. The sealing plate is provided with an air inlet hole. One end of the extension tube is connected to the ring body, and the other end of the extension tube is movably abutted against the sealing plate. The opening of the extension tube faces the air inlet hole, but it is only used to compress the gas in the air cylinder to generate air pressure when the firing pin is lifted. The air pressure is relatively small, resulting in weak penetration of the nail gun. Therefore, its structure needs to be further improved.

[0004] Utility Model Content

[0005] The purpose of the present utility model is to remedy the above-mentioned deficiencies and to disclose to the public a cylinder gas storage structure of a pneumatic tool which has a reasonable and compact structure and can increase the firing force of the firing pin.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A cylinder air storage structure of an air tool includes an air tool body, wherein a cylinder is arranged in the air tool body, and is characterized in that: a working air chamber and an air storage chamber that can communicate with each other are arranged in the cylinder, a driving device is arranged in the air tool body, a driving shaft is connected to the driving device, and the driving shaft is provided with an air storage driving part and a striker lifting driving part, the air storage driving part and the striker lifting driving part are both unidirectionally rotating, and the rotation directions of the two are opposite, and a piston connecting rod driven to and fro by the air storage driving part is arranged in the air storage chamber.

[0008] The measures to further optimize this technical solution are:

[0009] As an improvement, the gas storage drive element is a drive gear that meshes with a driven gear. The driven gear is mounted on a cam gear shaft, which is also provided with a cam. The end of the piston connecting rod is connected to the cam. The drive gear drives the driven gear, causing the cam gear shaft to rotate, which in turn drives the piston connecting rod through the cam to reciprocate within the gas storage chamber.

[0010] As an improvement, a mounting bracket is provided in the pneumatic tool body, and the cam gear shaft is rotatably mounted on the mounting bracket. A mounting platform is extended from the mounting bracket to one side of the driving device to provide conditions for the installation of the cam gear shaft.

[0011] As an improvement, the mounting bracket is formed with a baffle outside the cam gear shaft. The baffle is provided to provide a physical barrier outside the driven gear to prevent debris from entering and causing the gear to become stuck.

[0012] As an improvement, a one-way bearing is provided between the drive shaft and the gas storage drive member, and a one-way bearing is also provided between the drive shaft and the striker lifting drive member. The one-way bearings enable the gas storage drive member and the striker lifting drive member to rotate in one direction, thus simplifying the structure.

[0013] As an improvement, the driving device is a motor, and the motor is connected to a reducer.

[0014] As an improvement, the striker lifting drive member cooperates with the striker, and the tail end of the striker is placed in the working air chamber.

[0015] As an improvement, the working air chamber and the air storage chamber are arranged in parallel, which can make the structure more compact.

[0016] The advantages of this utility model compared with the prior art are:

[0017] The utility model provides a cylinder air storage structure for an air tool with a reasonable structure. An air storage drive component and a striker lifting drive component are coaxially arranged on a drive shaft. Both the air storage drive component and the striker lifting drive component rotate in one direction, and their rotation directions are opposite. The drive shaft rotates forward to lift the striker, and rotates in the reverse direction to store air in the cylinder. The two functions are completed by the same drive shaft, making the structure of the air tool more compact. The air storage chamber is used to store air in the cylinder, which can increase the firing force of the striker. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a perspective structural diagram of an embodiment of the present utility model;

[0019] Figure 2 is an enlarged view of part A in Figure 1;

[0020] FIG3 is a schematic structural diagram of the gas storage drive member and the cam gear shaft in FIG1 ;

[0021] FIG4 is a schematic diagram of the structure of FIG3 after removing the mounting bracket;

[0022] FIG5 is a cross-sectional structural diagram of the cylinder in FIG1 .

[0023] The names of the reference numerals in the accompanying drawings of the present utility model are:

[0024] Pneumatic tool body 1, mounting bracket 11, baffle 11a, cylinder 2, working air chamber 2a, air storage chamber 2b, drive device 3, reducer 31, drive shaft 4, air storage drive part 5, striker lifting drive part 6, piston connecting rod 7, cam gear shaft 8, driven gear 81, cam 82, striker 9. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings:

[0026] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0027] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0029] As shown in Figures 1 to 5, a cylinder gas storage structure of a pneumatic tool includes a pneumatic tool body 1, wherein a cylinder 2 is provided in the pneumatic tool body 1, wherein the cylinder 2 is provided with a working air chamber 2a and an air storage chamber 2b which are communicable with each other, wherein a driving device 3 is provided in the pneumatic tool body 1, and a driving shaft 4 is connected to the driving device 3.

[0030] The drive shaft 4 is provided with an air storage drive 5 and a striker lifting drive 6. The air storage drive 5 and the striker lifting drive 6 are both unidirectionally rotating, and the rotation directions of the two are opposite. The air storage chamber 2b is provided with a piston connecting rod 7 driven by the air storage drive 5 to reciprocate.

[0031] The driving device 3 is preferably a motor, and the motor is connected to a reducer 31. The pneumatic tool body 1 is provided with a housing (not shown in the figure).

[0032] The gas storage drive element 5 is a drive gear that meshes with a driven gear 81. The driven gear 81 is mounted on a cam gear shaft 8. The cam gear shaft 8 is also provided with a cam 82. The end of the piston connecting rod 7 is connected to the cam 82. The cam 82 on the cam gear shaft 8 drives the piston connecting rod 7 to reciprocate, resulting in a simple structure.

[0033] A mounting bracket 11 is provided in the pneumatic tool body 1 , and the cam gear shaft 8 is rotatably mounted on the mounting bracket 11 .

[0034] The mounting bracket 11 is formed with a baffle 11 a outside the cam gear shaft 8 .

[0035] A mounting platform is extended to one side of the driving device 3 through the mounting bracket 11, providing conditions for the installation of the cam gear shaft 8, and the setting of the baffle 11a provides a physical barrier outside the driven gear 81, which can prevent foreign matter from entering and causing the gear to get stuck, thereby reducing the failure rate.

[0036] A one-way bearing is provided between the drive shaft 4 and the gas storage drive member 5, and a one-way bearing is also provided between the drive shaft 4 and the striker lifting drive member 6. In the present invention, the drive shaft 4 is provided with two unidirectionally rotating components, namely the gas storage drive member 5 and the striker lifting drive member 6. The use of one-way bearings to achieve their unidirectional rotation simplifies the structure and ensures its compactness.

[0037] The striker lifting drive member 6 cooperates with the striker 9, and the tail end of the striker 9 is placed in the working air chamber 2a.

[0038] The working air chamber 2a and the air storage chamber 2b are arranged in parallel, so that the structure is compact.

[0039] Working principle:

[0040] In this pneumatic function, the motor drives the drive shaft 4 to rotate, and the forward and reverse rotation of the drive shaft 4 respectively realizes the lifting of the striker 9 and the storage of air in the cylinder 2.

[0041] When the motor rotates forward, the drive shaft 4 drives the striker lifting drive member 6 to rotate, and at this time, the gas storage drive member 5 does not rotate. In this embodiment, the lifting of the striker adopts a two-stage lifting structure, and the striker lifting drive member 6 is provided with a driving block and a plurality of driving columns arranged at intervals, and the striker is provided with a protrusion and a rack. As the striker lifting drive member 6 rotates, the driving block transmits the force to the protrusion of the striker 9 through the transition member (the transition member is arranged across the striker 9), thereby achieving a first-stage lifting. After completing the first-stage lifting, the striker lifting drive member 6 continues to rotate, and then the driving columns act one by one on the corresponding protruding teeth on the rack of the striker 9, thereby completing the second-stage lifting.

[0042] When the motor rotates in the reverse direction, the drive shaft 4 rotates the gas storage drive 5, while the striker lift drive 6 does not rotate. The drive gear (i.e., the dynamic gas storage drive 5) rotates, which in turn drives the cam gear shaft 8 via the meshing driven gear 81, thereby rotating the cam 82 on the cam gear shaft 8. This in turn drives the piston connecting rod 7 to reciprocate within the gas storage chamber 2b, thereby inflating the cylinder 2. Inflating the gas storage chamber 2b increases the gas in the working chamber 2a, which is connected to the working chamber 2a (a one-way valve is provided between the two chambers), thereby increasing the firing force of the striker 9.

[0043] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A cylinder gas storage structure for a pneumatic tool, comprising a pneumatic tool body (1), wherein a cylinder (2) is arranged in the pneumatic tool body (1), wherein: The cylinder (2) is provided with a working air chamber (2a) and an air storage chamber (2b) which are communicated with each other. The pneumatic tool body (1) is provided with a driving device (3). The driving device (3) is connected with a driving shaft (4). The driving shaft (4) is provided with an air storage driving member (5) and a striker lifting driving member (6). The air storage driving member (5) and the striker lifting driving member (6) are both unidirectionally rotatable, and the rotation directions of the two are opposite. The air storage chamber (2b) is provided with a piston connecting rod (7) which is driven by the air storage driving member (5) to perform reciprocating motion.

2. The cylinder gas storage structure of a pneumatic tool according to claim 1, characterized in that: The gas storage drive member (5) is a driving gear, which meshes with a driven gear (81). The driven gear (81) is arranged on a cam gear shaft (8). A cam (82) is also arranged on the cam gear shaft (8). The end of the piston connecting rod (7) is connected to the cam (82).

3. The cylinder gas storage structure of a pneumatic tool according to claim 2, characterized in that: A mounting bracket (11) is arranged inside the pneumatic tool body (1), and the cam gear shaft (8) is rotatably mounted on the mounting bracket (11).

4. The cylinder gas storage structure of a pneumatic tool according to claim 3 is characterized in that: The mounting bracket (11) is formed with a baffle (11a) outside the cam gear shaft (8).

5. The cylinder gas storage structure of a pneumatic tool according to claim 4, characterized in that: A one-way bearing is arranged between the driving shaft (4) and the gas storage driving member (5), and a one-way bearing is also arranged between the driving shaft (4) and the striker lifting driving member (6).

6. The cylinder gas storage structure of a pneumatic tool according to claim 5, characterized in that: The driving device (3) is a motor, and a reducer (31) is connected to the motor.

7. The cylinder gas storage structure of a pneumatic tool according to claim 6, characterized in that: The striker lifting driving member (6) cooperates with the striker (9), and the tail end of the striker (9) is placed in the working air chamber (2a).

8. The cylinder gas storage structure of a pneumatic tool according to claim 7, characterized in that: The working air chamber (2a) and the air storage chamber (2b) are arranged in parallel.

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