A straight shank plate air drill

Abstract

This utility model discloses a straight shank plate-type air drill, belonging to the technical field of hole-making equipment. The straight shank plate-type air drill includes a working head assembly, a power assembly, and a handle assembly. The working head assembly includes a gearbox and a connecting sleeve fixed to one end of the gearbox. A drive gear, a driven gear, an idler gear, and an output gear are rotatably mounted inside the gearbox. The drive gear, driven gear, idler gear, and output gear are sequentially meshed. A transmission shaft is provided inside the connecting sleeve. A drill bit mounting hole is provided on one side of the output gear. This design optimizes the gear transmission structure of the working head assembly, allowing the drive gear, driven gear, idler gear, and output gear to mesh sequentially, effectively shortening the overall length of the working head. It can easily adapt to hole-making operations in narrow vertical spaces, solving the problem of limited operation of traditional air drills in confined areas and greatly improving the overall ease of use.

Description

Technical Field

[0001] This utility model relates to the field of hole-making equipment technology, and more specifically, to a straight shank plate air drill. Background Technology

[0002] Air drills are handheld pneumatic hole-making tools. This series of tools is widely used in mechanical assembly, automobile manufacturing, aircraft manufacturing and non-standard equipment manufacturing, and is especially suitable for making holes in aluminum and magnesium alloys.

[0003] Based on the above, the inventors have discovered that currently widely used straight shank air drills and gun-handle air drills still have some shortcomings in use. For example, they cannot perform hole-making operations in narrow vertical spaces, which affects processing. Furthermore, the handles and grips are mostly designed as a single piece, resulting in poor overall heat insulation, cooling, and shock absorption. Therefore, in view of these issues, the inventors have researched and improved the existing structures to provide a straight shank plate air drill, aiming to achieve greater practical value. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a straight shank plate air drill, which can optimize the gear transmission structure of the working head assembly, so that the driving gear, driven gear, idler gear and output gear mesh in sequence, effectively shortening the overall length of the working head, and can easily adapt to hole-making operations in narrow spaces in the vertical direction. It solves the problem of limited operation of traditional air drills in narrow areas and greatly improves the overall convenience of use.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A straight shank plate air drill includes a working head assembly, a power assembly, and a handle assembly. The working head assembly includes a gearbox and a connecting sleeve fixed to one end of the gearbox. A drive gear, a driven gear, an idler gear, and an output gear are rotatably mounted inside the gearbox. The drive gear, driven gear, idler gear, and output gear are sequentially meshed and connected. A drive shaft is provided inside the connecting sleeve. A drill bit mounting hole is provided on one side of the output gear.

[0009] The power assembly includes a grip housing, within which an engine assembly and a reducer assembly are disposed. The grip housing is connected to a connecting sleeve via a clamping nut, and the reducer assembly is connected to the drive gear via a drive shaft.

[0010] The handle assembly includes a handle housing fixed to one end of the grip shell. A pressure handle is rotatably connected to the outer periphery of one end of the handle housing via a pin. A valve stem is provided inside the handle housing. The top end of the valve stem extends to the outside of the handle housing and contacts the bottom of the pressure handle. An air nozzle is installed at one end of the handle housing.

[0011] Furthermore, the engine assembly includes a cylinder installed inside the grip housing, with a front cover and a rear cover fixedly installed at both ends of the cylinder, and a rotor rotatably connected inside the cylinder, with blades arranged on the outer periphery of the rotor.

[0012] Furthermore, the reducer assembly includes an internal gear sleeve installed inside the grip housing, and a gear carrier is rotatably connected inside the internal gear sleeve via a bearing, with a planetary gear fixedly installed at one end of the gear carrier.

[0013] Furthermore, the gear end of the rotor is meshed with a planetary gear.

[0014] Furthermore, the gear carrier and the drive gear are connected by a transmission shaft.

[0015] Furthermore, the handle housing has an air passage inside, and the cylinder and air inlet are both connected to the air passage.

[0016] Furthermore, the bottom end of the valve stem extends into the air passage, and a return spring is fixedly installed between the bottom extension end of the valve stem and the bottom of the air passage.

[0017] 3. Beneficial Effects

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] (1) This solution optimizes the gear transmission structure of the working head assembly, so that the driving gear, driven gear, idler gear and output gear mesh in sequence, effectively shortening the overall length of the working head. It can easily adapt to hole-making operations in narrow spaces in the vertical direction, solving the problem of limited operation of traditional air drills in narrow areas and greatly improving the overall ease of use.

[0020] (2) This solution adopts a split design between the handle assembly and the grip shell, which significantly improves the heat insulation and cooling effect when using the tool, reduces vibration transmission, makes the operator more comfortable to hold, and is less prone to fatigue during long-term operation. In addition, the efficient cooperation between the engine assembly and the reducer assembly in the power assembly, combined with the stable transmission of the drive shaft, ensures the uniformity and continuity of the output torque, improves the hole-making accuracy and work efficiency, and meets the needs of mechanical assembly, automobile manufacturing and other fields for high-quality hole-making. Attached Figure Description

[0021] Figure 1This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the gearbox and connecting sleeve of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the grip shell and handle shell of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the engine assembly of this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the reducer assembly of this utility model.

[0026] Explanation of the labels in the diagram:

[0027] 1. Gearbox;

[0028] 2. Connecting sleeve;

[0029] 3. Drive gear;

[0030] 4. Driven gear;

[0031] 5. Idle wheel;

[0032] 6. Output gear;

[0033] 7. Drive shaft;

[0034] 8. Handle casing;

[0035] 9. Engine components; 901. Cylinder; 902. Front cover; 903. Rear cover; 904. Rotor; 905. Blade;

[0036] 10. Reducer assembly; 1001. Internal gear sleeve; 1002. Gear carrier; 1003. Planetary gear;

[0037] 11. Handle housing;

[0038] 12. Press handle;

[0039] 13. Valve stem;

[0040] 14. Wind-blown nozzle;

[0041] 15. Airway;

[0042] 16. Return spring. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0044] Example:

[0045] Please see Figures 1-5 A straight shank plate air drill includes a working head assembly, a power assembly, and a handle assembly. The working head assembly includes a gearbox 1 and a connecting sleeve 2 fixed to one end of the gearbox 1. A driving gear 3, a driven gear 4, an idler gear 5, and an output gear 6 are rotatably mounted inside the gearbox 1. The driving gear 3, driven gear 4, idler gear 5, and output gear 6 are sequentially meshed and connected. A drive shaft 7 is provided inside the connecting sleeve 2. A drill bit mounting hole is opened on one side of the output gear 6.

[0046] The power assembly includes a grip housing 8, and an engine assembly 9 and a reducer assembly 10 are disposed inside the grip housing 8. The grip housing 8 is connected to the connecting sleeve 2 by a clamping nut, and the reducer assembly 10 is connected to the drive gear 3 by a drive shaft 7.

[0047] The handle assembly includes a handle housing 11 fixed to one end of the handle housing 8. A pressure handle 12 is rotatably connected to the outer periphery of one end of the handle housing 11 via a pin. A valve stem 13 is provided inside the handle housing 11. The top end of the valve stem 13 extends to the outside of the handle housing 11 and contacts the bottom of the pressure handle 12. An air nozzle 14 is installed at one end of the handle housing 11.

[0048] See Figure 4 The engine assembly 9 includes a cylinder 901 installed inside the grip housing 8. A front cover 902 and a rear cover 903 are fixedly installed at both ends of the cylinder 901, and a rotor 904 is rotatably connected inside the cylinder 901. Blades 905 are provided on the outer periphery of the rotor 904.

[0049] See Figure 5 The reducer assembly 10 includes an inner gear sleeve 1001 installed inside the handle housing 8. A gear carrier 1002 is rotatably connected inside the inner gear sleeve 1001 via a bearing. A planetary gear 1003 is fixedly installed at one end of the gear carrier 1002.

[0050] See Figure 4 The gear end of rotor 904 meshes with planetary gear 1003.

[0051] See Figure 5 The gear carrier 1002 and the drive gear 3 are connected by a drive shaft 7.

[0052] See Figure 3 The handle housing 11 has an air passage 15 inside, and the cylinder 901 and the air inlet 14 are both connected to the air passage 15.

[0053] See Figure 3 The bottom end of the valve stem 13 extends into the air passage 15, and a return spring 16 is fixedly installed between the bottom extension end of the valve stem 13 and the bottom of the air passage 15.

[0054] Working principle: When in use, press the handle 12, the valve stem 13 moves downward, and compressed air enters from the air inlet 14 and air passage 15 to drive the engine assembly 9. The output end of the engine assembly 9 is the gear end of the rotor 904. The gear end of the rotor 904 meshes with the planetary gear 1003 in the reducer assembly 10 to reduce speed and drive the gear carrier 1002 to rotate. The gear carrier 1002 and the transmission shaft 7 in the connecting sleeve 2 are connected by a hexagon to achieve transmission. The transmission shaft 7 is connected to the driving gear 3 by a hexagon. The driving gear 3 is driven by meshing with the driven gear 4. The driven gear 4 is driven by meshing with the idler gear 5. The idler gear 5 is meshed with the output gear 6. The output gear 6 is connected to the cutting tool by a thread, and finally realizes the hole-making action. The whole operation can easily adapt to hole-making operations in narrow spaces in the vertical direction, solves the problem of limited operation of traditional air drills in narrow areas, and greatly improves the overall convenience of use.

[0055] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A straight shank pneumatic drill, comprising a working head assembly, a power assembly, and a handle assembly, characterized in that: The working head assembly includes a gearbox (1) and a connecting sleeve (2) fixed to one end of the gearbox (1). The gearbox (1) is rotatably equipped with a driving gear (3), a driven gear (4), an idler gear (5), and an output gear (6). The driving gear (3), driven gear (4), idler gear (5), and output gear (6) are sequentially meshed and connected. A drive shaft (7) is provided inside the connecting sleeve (2). A drill bit mounting hole is provided on one side of the output gear (6). The power assembly includes a handle housing (8), in which an engine assembly (9) and a reducer assembly (10) are disposed. The handle housing (8) is connected to the connecting sleeve (2) by a clamping nut. The reducer assembly (10) is connected to the drive gear (3) by a drive shaft (7). The handle assembly includes a handle housing (11) fixed to one end of the handle housing (8). A pressure handle (12) is rotatably connected to one end of the handle housing (11) via a pin. A valve stem (13) is provided inside the handle housing (11). The top end of the valve stem (13) extends to the outside of the handle housing (11) and contacts the bottom of the pressure handle (12). An air nozzle (14) is installed at one end of the handle housing (11).

2. The straight shank plate air drill according to claim 1, characterized in that: The engine assembly (9) includes a cylinder (901) installed inside the grip housing (8). A front cover (902) and a rear cover (903) are fixedly installed at both ends of the cylinder (901). A rotor (904) is rotatably connected inside the cylinder (901). Blades (905) are provided on the outer periphery of the rotor (904).

3. A straight shank plate air drill according to claim 1, characterized in that: The reducer assembly (10) includes an inner gear sleeve (1001) installed inside the handle housing (8). A gear carrier (1002) is rotatably connected inside the inner gear sleeve (1001) via a bearing. A planetary gear (1003) is fixedly installed at one end of the gear carrier (1002).

4. A straight shank plate air drill according to claim 2, characterized in that: The gear end of the rotor (904) is meshed with the planetary gear (1003).

5. A straight shank plate air drill according to claim 3, characterized in that: The gear carrier (1002) and the drive gear (3) are connected by a drive shaft (7).

6. A straight shank plate air drill according to claim 1, characterized in that: The handle housing (11) has an air passage (15) inside, and the cylinder (901) and the air inlet (14) are connected to the air passage (15).

7. A straight shank plate air drill according to claim 1, characterized in that: The bottom end of the valve stem (13) extends into the air passage (15), and a return spring (16) is fixedly installed between the bottom extension end of the valve stem (13) and the bottom of the air passage (15).

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