An impact wrench for internal hexagonal socket screws

Abstract

The application relates to an impact wrench for an internal hexagonal screw. The impact wrench comprises a sleeve, an accommodation hole is formed in the end face of one end of the sleeve, an elastic element and a hexagonal tool head are sequentially arranged in the accommodation hole from inside to outside, a slot is formed in the outer side surface of the sleeve and extends to the accommodation hole, the extension direction of the slot is obliquely arranged along the extension direction of the sleeve, and a locking pin is fixedly connected with the side surface of the hexagonal tool head through the slot. The movement of the locking pin is guided through the slot, and the rotation of the hexagonal tool head is driven, under the cooperation of the elastic element, the locking pin and the slot, the hexagonal tool head is rotated in the impact mode to generate the torque for rotating the screw.

Description

Technical Field

[0001] This application relates to the field of impact wrench technology, and in particular to an impact wrench for internal hexagonal screws. Background Technology

[0002] Different types of screws are required when installing hot-section components of aero engines. In some locations, due to limited space, standard hex head screws and socket head cap screws cannot be installed. Therefore, flat-headed socket head cap screws with a hexagonal design are used. These screws have thinner heads, occupy less space, and the hexagonal inner hole increases the contact area with tools, facilitating disassembly. However, during engine operation, screws in high-temperature areas are prone to sintering or sintering due to immersion in lubricating oil, resulting in increased disassembly torque. Because of the thin head, tools are prone to slipping. Therefore, existing methods mainly have the following drawbacks: the thin screw head limits the depth of disassembly tools, leading to increased torque and easy slippage; the screwdriver handle can only apply insufficient torque to disassemble the screw. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this application is to provide an internal hexagonal screw impact wrench. It includes a sleeve, one end face of which has a receiving hole. An elastic element and a hexagonal tool head are sequentially arranged from the inside to the outside of the receiving hole. A groove extending through the receiving hole is formed on the outer side of the sleeve, and the groove extends obliquely along the extension direction of the sleeve. It also includes a locking pin, which passes through the groove and is fixedly connected to the side of the hexagonal tool head.

[0004] Preferably, the elastic element is a spring.

[0005] Preferably, the slots are symmetrically opened on both sides of the sleeve, and the side of the six-petal tool head is provided with a connecting hole that passes through both sides of the six-petal tool head. The locking pin is connected to the connecting hole by an interference fit.

[0006] Preferably, the groove is a V-shaped groove.

[0007] Preferably, the sleeve is made of steel rod.

[0008] Preferably, the six-petal tool head and the receiving hole are fitted with a clearance.

[0009] Preferably, the contact surface between the locking pin and the groove is arc-shaped.

[0010] Preferably, the locking pin is cylindrical.

[0011] In summary, this application includes the following beneficial technical effects:

[0012] 1. With the cooperation of the elastic element, locking pin and groove, the six-petal tool head is pressed against the target screw by impact and rotates the screw by the torque generated by rotation.

[0013] 2. By applying impact pressure to the vertical target screw, the tool head can be prevented from slipping off, which is a common problem with conventional manual screw tightening. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Sleeve; 2. Elastic element; 3. Six-point tool head; 4. Groove; 5. Locking pin. Detailed Implementation

[0017] 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 this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] The following is in conjunction with the appendix Figure 1 This application provides a further detailed description. An embodiment of this application discloses an internal hexagonal screw impact wrench. It includes a sleeve 1, with a receiving hole at one end face. An elastic element 2 and a hexagonal tool head 3 are sequentially arranged from the inside to the outside of the receiving hole. The elasticity of the elastic element 2 causes the hexagonal tool head 3 to reciprocate along the extension direction of the sleeve 1. Specifically, the elastic element 2 is a spring. To ensure smoother reciprocating movement of the hexagonal tool head 3, a clearance fit is provided between the hexagonal tool head 3 and the receiving hole.

[0019] The outer surface of the sleeve 1 has a groove 4 extending through to the receiving hole. The groove 4 extends obliquely along the extension direction of the sleeve 1 and includes a locking pin 5, which passes through the groove 4 and is fixedly connected to the side of the six-point tool head 3. The extension direction of the groove 4 controls and restricts the movement direction of the locking pin 5, thereby driving the reciprocating motion of the six-point tool head 3. Specifically, the oblique extension direction of the groove 4 relative to the extension direction of the sleeve 1 guides the movement of the locking pin 5, allowing the locking pin 5 to move simultaneously in the extension direction of the sleeve 1 and laterally perpendicular to the extension direction of the sleeve 1. This drives the six-point tool head 3 to rotate while reciprocating within the receiving hole, thereby tightening or loosening the target screw using the six-point tool head 3. Typically, the sleeve 1 is cylindrical, meaning the extension direction of the groove 4 is obliquely set relative to the axis of the sleeve 1, so that the guiding direction of the groove 4 includes both the axial direction and the radial direction of the cylindrical sleeve 1.

[0020] To better drive the rotation of the six-petal tool head 3 through the movement of the locking pin 5, grooves 4 are symmetrically formed on both sides of the sleeve 1. Connecting holes penetrating both sides of the six-petal tool head 3 are provided on its side, and the locking pin 5 is connected to these connecting holes with an interference fit. This ensures that the rotation axis of the locking pin 5, guided by the grooves 4, coincides with the rotation axis of the six-petal tool head 3, thus better enabling the locking pin 5 to drive the rotation of the six-petal tool head 3.

[0021] Furthermore, groove 4 is a V-shaped groove, which allows groove 4 to guide the six-petal tool head 3 to rotate forward or backward.

[0022] Furthermore, to ensure smoother movement of the locking pin 5 within the groove 4, the contact surface between the locking pin 5 and the groove 4 is arc-shaped. Specifically, the locking pin 5 is a cylinder.

[0023] Furthermore, to ensure the strength of sleeve 1, sleeve 1 is made of steel rod.

[0024] Working principle: Connect the end of the sleeve 1 without the receiving hole to the corresponding power tool or handheld device. Align the end of the sleeve 1 with the receiving hole with the screw, and insert the hexagonal tool head 3 into the corresponding screw's internal hexagonal head. By applying an impact force, such as tapping, to one end of the hexagonal tool head 3 along the extension direction of the sleeve 1, the elastic element 2 is compressed, causing the hexagonal tool head 3 to move. Under the cooperation of the locking pin 5 and the groove 4, the hexagonal tool head 3 rotates, applying a rotational torque to the target internal hexagonal screw.

[0025] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and concept of this application, and all such substitutions or changes should fall within the protection scope of the appended claims.

Claims

1. An impact wrench for internal hexagonal screws, characterized in that, The device includes a sleeve (1), one end face of which has a receiving hole. An elastic element (2) and a six-petal tool head (3) are arranged sequentially from the inside to the outside in the receiving hole. A groove (4) is provided on the outer side of the sleeve (1) and extends through to the receiving hole. The groove (4) extends obliquely along the extension direction of the sleeve (1). The device also includes a locking pin (5), which passes through the groove (4) and is fixedly connected to the side of the six-petal tool head (3).

2. The impact wrench for internal hexagonal screws according to claim 1, characterized in that, The elastic element (2) is a spring.

3. The impact wrench for internal hexagonal screws according to claim 1, characterized in that, The groove (4) is symmetrically opened on both sides of the sleeve (1), and the side of the six-flower tool head (3) is provided with a connecting hole that passes through both sides of the six-flower tool head (3). The locking pin (5) is connected to the connecting hole by an interference fit.

4. The impact wrench for internal hexagonal screws according to claim 1, characterized in that, The groove (4) is a V-shaped groove.

5. The impact wrench for internal hexagonal screws according to claim 1, characterized in that, The sleeve (1) is a steel rod.

6. The impact wrench for internal hexagonal screws according to claim 1, characterized in that, The six-petal tool head (3) is clearance-fitted with the receiving hole.

7. The impact wrench for internal hexagonal screws according to claim 1, characterized in that, The contact surface between the locking pin (5) and the groove (4) is arc-shaped.

8. The impact wrench for internal hexagonal screws according to claim 7, characterized in that, The locking pin (5) is a cylinder.

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