Impact tool head assembling structure

Abstract

The invention discloses an impact tool head assembling structure which is composed of a power type impact tool, a connecting piece and a tool head, the impact tool is provided with an inner pipe fitting, the inner pipe fitting is provided with a cavity, an impact block capable of being driven to move in a reciprocating mode is arranged in the cavity, a positioning hole is formed in one end of the inner pipe fitting, the positioning hole is in a hexagonal hole shape, and the tool head is arranged in the cavity. An assembling part is formed at one end of the connecting piece, the other end of the connecting piece sequentially extends to form an extending section and an inserting section, the inserting section is used for being inserted into the positioning hole, and the shape of the inserting section corresponds to that of the positioning hole, so that the connecting piece and the impact tool can be assembled together, and meanwhile, the connecting piece is limited from rotating; the tool head is rotatably arranged on the assembling portion and provided with a head portion, and the head portion is in a quadrangular column shape so that a sleeve tool can be arranged on the head portion in a sleeved mode.

Description

Technical Field

[0001] This invention relates to powered impact tools, and more particularly to an impact tool head assembly structure capable of removing threaded assemblies that are tightly jammed in a workpiece. Background Technology

[0002] Common threaded components such as nuts and bolts, if left in the workpiece for a long time after being locked in, may become tightly stuck due to rust or thermal expansion and contraction, making them difficult to remove. In this case, it is necessary to use an impact tool to disassemble them. The impact tool used on the market for disassembling threaded components is mainly made by first attaching a screwdriver or socket to the working end of the impact tool. One hand holds the handle of the impact screwdriver, and then connects the screwdriver or socket to the threaded component. The other hand uses a hammer to repeatedly strike the end of the handle of the impact screwdriver. The vibration generated by the hammering causes the tool to rotate at a predetermined angle, which can gradually loosen the stuck threaded component.

[0003] However, existing impact tools require one hand to hold the hammer while the other hand holds the hammer to strike. This is not only time-consuming and laborious, but the manual striking method also makes it easy to accidentally hit the hand, often resulting in injuries. This problem has existed for a long time, but there is still no reliable solution, making it a long-standing issue in this technical field.

[0004] Furthermore, existing impact tools lack a reasonable assembly mechanism, making them unsuitable for direct mounting on powered impact tools (such as pneumatic impact tools). Although various powered impact tools are available on the market, none are specifically designed for removing threaded components that are tightly stuck in workpieces. Therefore, it is necessary to further improve the existing technology to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an impact tool head assembly structure that can perform removal work on threaded assemblies that are tightly stuck in a workpiece.

[0006] To solve the above technical problems, the present invention provides an impact tool head assembly structure, comprising:

[0007] A power impact tool has a handle with an inner tube inside the handle. The inner tube has a chamber inside, and an impact block that can be driven by an external power to reciprocate within the chamber is provided in the chamber. One end of the inner tube has a hexagonal positioning hole that communicates with the chamber, and the positioning hole is non-circular and has six locking surfaces.

[0008] A connector has a set of connecting portions extending outwards at one end, and at the other end of the connector, sequentially extending in a direction relatively away from the set of connecting portions, a smaller outer diameter extension segment and an insertion segment are formed. The set of connecting portions and the extension segment are integrally connected by a gradually tapering annular inclined surface towards the extension segment, and an arc segment is formed at the junction of the annular inclined surface and the extension segment. The total length of the extension segment and the insertion segment is greater than the length of the set of connecting portions. The connector is inserted into a positioning hole with its insertion segment. The outer periphery of the insertion segment forms a hexagonal prism corresponding to the positioning hole, thereby restricting the connector from rotating; and

[0009] A tool head is rotatably mounted on the assembly part. The tool head has a head protruding from the assembly part and is prismatic in shape to accommodate a sleeve tool. The assembly part is flared outward and has an open groove inside. The tool head has a body extending into the groove. The assembly part has an annular recess and two oblique grooves on opposite sides of the annular recess. A spring is installed in the groove, with its two ends abutting against the bottom surface of the groove and the body of the tool head to push against the tool head. A pin passes through the oblique groove of the assembly part and onto the body of the tool head, with its two ends passing through the oblique grooves on opposite sides of the assembly part. A bushing is encircled on the annular recess to cover the oblique grooves and the pin.

[0010] Preferably, the front end of the inner tube is provided with a sleeve. When the connector is inserted into the positioning hole with its insertion section, the extension section passes through the sleeve, and the sleeve has an abutment portion that can abut against the extension section. In a preferred embodiment, the sleeve is integrally extended from the front end of the inner tube outside the handle and is in the shape of a hollow tube. The abutment portion is formed by a quick-release connector provided on the sleeve. The abutment portion has a collar and several beads located inside the collar and partially extending into the sleeve. When the connector is inserted into the positioning hole with its insertion section, the extension section passes through the sleeve, and the insertion section and the extension section are respectively supported by the positioning hole and the beads of the abutment portion.

[0011] An annular flange is formed by external expansion between the extension section and the insertion section. When the connector is inserted into the positioning hole with its insertion section, the end of the insertion section extends into the cavity of the inner tube, while the annular flange abuts against an inner peripheral wall of the inner tube.

[0012] The oblique grooves on the two opposite sides of the joint are V-shaped.

[0013] The beneficial effects of this invention are:

[0014] 1. The connector of the present invention extends sequentially to form an extension section with a smaller outer diameter and an insertion section, thereby reducing the overall weight of the connector. The assembly part and the extension section are integrally connected by an annular inclined surface that gradually narrows towards the extension section. Through the configuration of the annular inclined surface, the wall thickness between the assembly part and the extension section is increased, thereby improving its structural strength and seismic resistance under impact. An arc segment is formed at the junction of the annular inclined surface and the extension section. The design of the arc end corner provides a good stress dispersion effect, thereby preventing breakage due to severe vibration.

[0015] 2. The total length of the extension section and the insertion section of this invention is greater than the length of the assembly, ensuring the stability of the center of gravity after the connector is assembled. Furthermore, when the connector is inserted into the positioning hole with its insertion section, the insertion section and the extension section are supported by the ball joint of the positioning hole and the abutment section, respectively, effectively reducing the shaking of the insertion section and the extension section of the connector and ensuring reliable transmission.

[0016] 3. When the connector of the present invention is inserted into the positioning hole with its insertion section opposite to the insertion section, the end of the insertion section extends into the cavity of the inner tube, and the annular flange abuts against the inner tube on the inner peripheral wall between the sleeve and the positioning hole with the arc surface facing the positioning hole, which has an arc surface shape corresponding to the arc surface. This provides a limiting effect when the connector is reset, and at the same time ensures its straightness after reset, so that the center position of the connector can be aligned with the axis of the cavity.

[0017] 4. The present invention provides a positioning hole at the front end of the inner tube of the power impact tool that communicates with the chamber, and uses the locking surface formed by the inner edge of the positioning hole for the insertion section of the connector to be inserted accordingly. Without significantly changing the internal mechanism of the power impact tool, the connector can be directly assembled and used on the power impact tool.

[0018] 5. This invention is driven by a power-driven impact tool, thus providing high power output and extremely high work efficiency.

[0019] 6. This invention uses external power to drive the impact block to automatically perform the striking action, which can eliminate the physical exertion of striking with a hand hammer, and at the same time can effectively solve the problem of accidental hand injuries caused by manual striking. Attached Figure Description

[0020] Figure 1 This is an exploded view of the present invention.

[0021] Figure 2 This is an assembly diagram of the present invention.

[0022] Figure 3 This is a three-dimensional schematic diagram of the assembled version of the present invention.

[0023] Figure 4 This is a cross-sectional view of the assembled version of the present invention.

[0024] Figure 5 yes Figure 4 A magnified view of a portion of the image.

[0025] Powered impact tool 11

[0026] Grip 12

[0027] Internal fittings 13

[0028] Chamber 131

[0029] Frontend 132

[0030] Inner peripheral wall 133

[0031] Impact Block 14

[0032] Positioning hole 15

[0033] Card face value 151

[0034] Socket 16

[0035] Contact part 17

[0036] Ring 171

[0037] Button 18

[0038] Return spring 172

[0039] 173 beads

[0040] Connector 21

[0041] Assembly part 22

[0042] Slot 221

[0043] Circular inclined plane 222

[0044] Arc segment 223

[0045] Extension 23

[0046] Insertion segment 24

[0047] Round rod 241

[0048] Plane 242

[0049] 25mm annular flange

[0050] Curved surface 251

[0051] 26 concave segments

[0052] Inclined groove 27

[0053] Spring 28

[0054] Sales 29

[0055] Total length L1

[0056] Length L2

[0057] Tool head 31

[0058] Body 32

[0059] Head 33

[0060] Bushing 34 Detailed Implementation

[0061] like Figures 1-5 As shown, the impact tool head assembly structure provided by the present invention mainly consists of a power impact tool 11, a connector 21, and a tool head 31, wherein:

[0062] The powered impact tool 11 has a handle 12. In this embodiment, the handle 12 is pistol-shaped and has an inner tube 13 at the top. The inner tube 13 forms a chamber 131 inside. An impact block 14 is provided in the chamber 131 and can be driven by a high-pressure air to move back and forth in the chamber 131. Since the operation mode of the impact block 14 is prior art and not the focus of this case, it will not be described in detail here. The inner tube 13 has a front end 132, and the front end 132 has a positioning hole 15 communicating with the chamber 131. The inner edge of the positioning hole 15 is non-circular and has at least one abutment surface 151. In this embodiment, the positioning hole 15 is hexagonal and has six abutment surfaces 151. The front end 132 of the inner tube 13 is provided with a sleeve 16. In this embodiment, a sleeve 16 extending out of the handle 12 and in the shape of a hollow tube is integrally formed on the front end 132 of the inner tube 13. An abutment portion 17 composed of a quick-release connector is provided on the outer periphery of the sleeve 16. The abutment portion 17 composed of the quick-release connector has a collar 171, a return spring 172 for pushing the collar, and several beads 173 disposed in the collar 171 and partially inserted into the sleeve 16.

[0063] The connector 21 has an outwardly expanding sleeve-shaped assembly portion 22 at one end, with an open receiving groove 221 inside. The other end of the connector 21 is integrally connected to an extension section 23 and an insertion section 24 that extend in sequence in a direction relatively away from the assembly portion 22. The ratio of the outer diameters of the assembly portion 22, the extension section 23, and the insertion section 24 is approximately 2:1:0.8 to reduce the overall weight of the connector 21. It should be noted that the assembly portion 22 and the extension section 23 are integrally connected by an annular inclined surface 222 that gradually narrows towards the extension section 23. The arrangement of the annular inclined surface 222 increases the wall thickness between the assembly portion 22 and the extension section 23, improving its impact resistance and seismic resistance. An arc segment 223 is formed at the junction of the annular inclined surface 222 and the extension section 23. The design of the arc end corner provides good stress dispersion and can prevent breakage due to severe vibration. Between the extension section 23 and the insertion section 24, an annular flange 25 is integrally formed. The connector 21 is inserted into the positioning hole 15 with its insertion section 24, while the extension section 23 passes through the sleeve 16. The outer periphery of the insertion section 24 has a shape corresponding to the positioning hole, thereby restricting the connector 21 from rotating radially. In this embodiment, the insertion section 24 is formed by directly cutting six planes 242 on the outer periphery of a round rod 241, which correspond to the shape of the inner edge of the positioning hole 15, so that the insertion section 24 forms a hexagonal prism shape corresponding to the shape of the inner edge of the positioning hole 15. In order to ensure the stability of the center of gravity after the connector 21 is assembled, the total length L1 of the extension section 23 and the insertion section 24 is greater than the length L2 of the assembly part 22. When the connector 21 is inserted into the positioning hole 15 with its insertion section 24, the insertion section 24 and the extension section 23 are respectively supported by the positioning hole 15 and the bead 173 of the abutment part 17, so as to effectively reduce the insertion of the connector 21. The insertion section 24 and the extension section 23 vibrate to ensure the reliability of their transmission. In addition, when the connector 21 is inserted into the positioning hole 15 with its insertion section 24, the end of the insertion section 24 extends into the cavity 131 of the inner tube 13. The annular flange 25 abuts against the inner tube 13 with its arc surface 251 facing the positioning hole 15 on an inner peripheral wall 133 between the sleeve 16 and the positioning hole 15, which has a shape corresponding to the arc surface 251. This provides a limiting effect when the connector 21 is reset, and at the same time ensures its straightness after reset, so that the center position of the connector 21 can be aligned with the axis of the cavity 131.

[0064] The tool head 31 is rotatably assembled in the groove 221 of the assembly part 22. The tool head 31 has a body 32 extending out of the groove 221 and a head 33 protruding out of the groove 221. The head 33 is in the shape of a quadrangular prism and can be fitted with a sleeve tool (not shown in the figure). In this embodiment, the assembly part 22 is provided with an annular recess 26 with a small outer diameter, and on the two opposite sides of the annular recess 26, there are V-shaped inclined grooves 27 that communicate with the receiving groove 221. A spring 28 is provided in the receiving groove 221. The two ends of the spring 28 are respectively used to abut against the bottom surface of the receiving groove 221 and the body 32 of the tool head 31 to push the tool head 31 against each other. A pin 29 passes through the inclined groove 27 of the assembly part 22 and is inserted into the body 32 of the tool head 31. The two ends of the pin 29 are respectively inserted into the inclined grooves 27 on the two opposite sides of the assembly part 22. A bushing 34 is then wrapped around the annular recess 26 to cover the inclined grooves 27 and the pin 29 to prevent the pin 29 from falling out of the inclined grooves 27. The assembly of the present invention is thus completed.

[0065] In practical use, when it is necessary to disassemble a threaded component (such as a nut) that is difficult to unscrew, the user only needs to first assemble a sleeve tool of a suitable size on the head 33 of the tool head 31, and then fit the sleeve tool onto the threaded component. Then, by pressing the button 18 on the handle 12, high-pressure air can be injected into the chamber 131 of the inner tube 13, thereby pushing the impact block 14 to strike the end of the insertion section 24 of the connector 21 that extends into the chamber 131 at high speed. At this time, the radial rotation of the connector 21 is restricted by the shape of the insertion section 24 and the positioning hole 15, so that the connector 21 can only move forward in its axial direction, thereby ensuring that its impact force can be fully output. As the connector 21 moves forward, it compresses the spring 28 to force the tool head 31 to retract, allowing the pin 29 to slide along the groove 27. This causes the tool head 31 and the sleeve tool mounted on the tool head 31 to rotate together. At the same time, the vibration generated by the impact block 14 can be completely transmitted to the threaded assembly. In this way, the threaded assembly that is tightly stuck on the workpiece can be easily rotated and removed.

[0066] The present invention provides a positioning hole 15 communicating with the chamber 131 at the front end 132 of the inner tube 13 of the power impact tool 11, and uses the locking surface 151 formed by the inner edge of the positioning hole 15 for the insertion section 24 of the connector 21 to be inserted accordingly. In this way, the connector 21 can be directly assembled and used on the power impact tool 11 without significantly changing the internal mechanism of the power impact tool 11. Furthermore, since the outer diameter of the assembly part 22 is larger than that of the extension section 23 and the insertion section 24, and the weight of the assembly part 22 is also heavier after the tool head 31 is installed, in order to ensure the stability of the center of gravity of the connector 21 after assembly, the extension section 23 is designed to be more robust. The total length L1 after adding the insertion section 24 is greater than the length L2 of the assembly section 22. When the insertion section 24 and the extension section 23 of the connector 21 are simultaneously inserted into the inner tube 13, they can be supported by the positioning hole 15 and the ball 173 of the abutment section 17, respectively. In addition, the annular inclined surface 222 and the arc section 223 that are integrally connected between the assembly section 22 and the extension section 23 can provide a good stress dispersion effect. This not only effectively reduces the shaking generated during impact and ensures the reliability of transmission, but also provides high power output and extremely high work efficiency through the power impact tool 11 driven by the present invention.

[0067] Furthermore, the present invention uses external power, such as high-pressure air in this embodiment, to drive the impact block 14 to automatically perform the striking action. Therefore, it not only eliminates the physical exertion of striking with a hand hammer, but also effectively solves the problem of accidental hand injuries caused by manual striking, making it highly practical.

[0068] However, the above embodiments are only for illustrating the present invention and are not intended to limit the present invention. Any substitution of equivalent components should still fall within the scope of the present invention.

[0069] In summary, this invention enables those skilled in the art to understand that it can indeed achieve the aforementioned objectives, and thus complies with the provisions of the Patent Law. Therefore, this application is filed in accordance with the law.

Claims

1. An impact tool head assembly structure, characterized in that, It contains: A power impact tool has a handle with an inner tube inside the handle. The inner tube has a chamber inside, and an impact block that can be driven by an external power to reciprocate within the chamber is provided in the chamber. One end of the inner tube has a hexagonal positioning hole that communicates with the chamber, and the positioning hole is non-circular and has six locking surfaces. A connector has a set of connecting portions extending outwards at one end, and at the other end of the connector, sequentially extending in a direction relatively away from the set of connecting portions, a smaller outer diameter extension segment and an insertion segment are formed. The set of connecting portions and the extension segment are integrally connected by a gradually tapering annular inclined surface towards the extension segment, and an arc segment is formed at the junction of the annular inclined surface and the extension segment. The total length of the extension segment and the insertion segment is greater than the length of the set of connecting portions. The connector is inserted into a positioning hole with its insertion segment. The outer periphery of the insertion segment forms a hexagonal prism corresponding to the positioning hole, thereby restricting the connector from rotating; and A tool head is rotatably mounted on the assembly part. The tool head has a head protruding from the assembly part and is prismatic in shape to accommodate a sleeve tool. The assembly part is flared outward and has an open groove inside. The tool head has a body extending into the groove. The assembly part has an annular recess and two oblique grooves on opposite sides of the annular recess. A spring is installed in the groove, with its two ends abutting against the bottom surface of the groove and the body of the tool head to push against the tool head. A pin passes through the oblique groove of the assembly part and onto the body of the tool head, with its two ends passing through the oblique grooves on opposite sides of the assembly part. A bushing is encircled on the annular recess to cover the oblique grooves and the pin.

2. The impact tool head assembly structure as described in claim 1, characterized in that: The inner tube is provided with a sleeve at its front end. When the connector is inserted into the positioning hole with its insertion section, the extension section passes through the sleeve, and the sleeve has an abutment portion that can abut against the extension section.

3. The impact tool head assembly structure as described in claim 2, characterized in that: The connector is a hollow tube extending integrally from the front end of the inner tube to the outside of the handle. The abutment portion is a quick-release connector provided on the connector. The abutment portion has a collar and several beads located inside the collar and partially extending into the connector. When the connector is inserted into the positioning hole with its insertion section, the extension section passes through the connector. The insertion section and the extension section are respectively supported by the positioning hole and the beads of the abutment portion.

4. The impact tool head assembly structure as described in claim 1, characterized in that: An annular flange is formed by external expansion between the extension section and the insertion section. When the connector is inserted into the positioning hole with its insertion section, the end of the insertion section extends into the cavity of the inner tube, while the annular flange abuts against an inner peripheral wall of the inner tube.

5. The impact tool head assembly structure as described in claim 1, characterized in that: The oblique grooves on the two opposite sides of the joint are V-shaped.

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