Impact tool

Abstract

This utility model relates to an impact tool, comprising: a main body, an impact member, and a hammering member. The main body includes an internal space, an impact chamber, and a insertion hole arranged sequentially along a first direction. The internal space and the impact chamber are interconnected, and the insertion hole connects to the impact chamber for an object to be impacted to pass through. The impact member is used to impact the object to be impacted. The impact member is movable from a first position to a second position within the impact chamber along the first direction. When the impact member is in the first position, it does not protrude from the insertion hole in the first direction, and a portion of the impact member protrudes into the internal space. The hammering member is movable back and forth within the internal space along the first direction to hammer the impact member and force it to move along the first direction.

Description

Technical Field

[0001] This utility model relates to hand tools, and in particular to an impact tool. Background Technology

[0002] After a period of vehicle use, the wheel hub may need to be replaced due to wear, external force or other factors, such as damaged wheel hub bearings, abnormal noise, deformation, worn bolt holes or damaged threads. Among these, the bolt is an important fastener that fixes the wheel to the wheel hub bearing unit. It bears the weight of the vehicle body, steering force, braking torque and lateral load, and is an important component for vehicle operation safety. In addition, the bolt must be removed from the wheel hub before replacement.

[0003] Traditional methods of removing automotive bolts involve the user directly striking the end of the bolt with a hammer, using the impact force to force the bolt out of the wheel hub. This traditional method not only relies on a lot of manpower, but also, because the hammer and bolt lack a guiding and positioning structure, it is very easy to accidentally damage adjacent structures, such as the wheel hub itself or brake discs, due to uneven impact or slippage, resulting in damage to vehicle parts and raising concerns about user safety.

[0004] Therefore, it is necessary to provide a novel and progressive impact tool to address the aforementioned problems. Utility Model Content

[0005] The main purpose of this utility model is to provide an impact tool that can effectively remove through parts, such as bolts on a wheel hub, without impacting surrounding components.

[0006] To achieve the above objectives, this utility model provides an impact tool, comprising: a main body, an impact member, and a hammering member. The main body includes an internal space, an impact chamber, and a insertion hole arranged sequentially along a first direction. The internal space and the impact chamber are interconnected, and the insertion hole connects to the impact chamber for an object to be impacted to pass through. The impact member is used to impact the object. The impact member is movable from a first position to a second position within the impact chamber along the first direction. When the impact member is in the first position, it does not protrude from the insertion hole in the first direction, and a portion of the impact member protrudes into the internal space. The hammering member is movable back and forth along the first direction within the internal space to hammer the impact member and force it to move along the first direction.

[0007] As a preferred embodiment of the above technical solution, the impact member includes a backing portion, a shoulder portion, and a collision portion. The backing portion is for abutting against the object to be impacted, and the collision portion is struck by the hammer. The shoulder portion is connected between the backing portion and the collision portion, and the outer diameter of the shoulder portion is larger than the outer diameter of the backing portion. When the impact member is in the first position, the shoulder portion abuts against a first stop portion surrounding the impact chamber in the opposite direction to the first position. When the impact member is in the second position, the shoulder portion abuts against a second stop portion surrounding the impact chamber in the first direction.

[0008] As a preferred embodiment of the above technical solution, preferably, the diameter of the insertion hole is not less than the outer diameter of the abutment portion, and when the impact member moves toward the second position, the abutment portion can extend into the internal space.

[0009] As a preferred embodiment of the above technical solution, preferably, when the impact member is in the second position, the collision portion remains protruding from the internal space.

[0010] As a preferred embodiment of the above technical solution, preferably, the length of the abutting part in the first direction is less than the length of the colliding part in the first direction.

[0011] As a preferred embodiment of the above technical solution, the maximum movement of the impact member in the first direction is defined as a first distance, and the maximum movement of the hammering member in the first direction is defined as a second distance, wherein the ratio of the first distance to the second distance is between 0.1 and 0.3.

[0012] As a preferred embodiment of the above technical solution, the main body further includes an air intake channel, an exhaust channel, at least one exhaust port, a valve chamber, a first channel, a second channel, a reset channel, and a valve. The air intake channel connects to the valve chamber, and the valve chamber connects to the side of the internal space away from the impact member via the first channel. The valve chamber connects to the reset channel via the second channel, and the reset channel connects to the side of the internal space near the impact member. The valve moves within the valve chamber due to pressure difference changes, thereby blocking the connection between the air intake channel and the first channel or blocking the connection between the air intake channel and the second channel. The at least one exhaust port connects the middle section of the internal space to the exhaust channel. When the valve blocks the connection between the air intake channel and the first channel, gas enters the internal space via the reset channel, causing the hammer to move in the opposite direction and away from the impact member. When the valve blocks the connection between the air intake channel and the second channel, gas enters the internal space via the first channel, causing the hammer to move in the first direction and approach the impact member.

[0013] As a preferred embodiment of the above technical solution, the main body further includes a first component and a second component. The first component has the internal space, and the second component includes a bottom wall and an annular side wall. The bottom wall has the insertion hole, and the annular side wall protrudes laterally from the bottom wall and is connected to the first component. Thus, the first component and the second component together enclose the impact chamber.

[0014] As a preferred embodiment of the above technical solution, preferably, when the impact member is located in the second position, the impact member does not protrude from the insertion hole in the first direction.

[0015] As a preferred embodiment of the above technical solution, preferably, when the impact member is located in the second position, the collision portion remains protruding from the internal space; the length of the abutment portion in the first direction is less than the length of the collision portion in the first direction; the maximum movement of the impact member in the first direction is defined as a first distance, and the maximum movement of the hammering member in the first direction is defined as a second distance, the ratio of the first distance to the second distance being between 0.1 and 0.3; the main body further includes an air intake channel, an exhaust channel, at least one exhaust port, a valve chamber, a first channel, a second channel, and a... A reset channel and a valve are provided. The intake channel connects to the valve chamber, which is connected to the side of the internal space away from the impact member via a first channel. The valve chamber is connected to the reset channel via a second channel, which is connected to the side of the internal space near the impact member. The valve moves within the valve chamber due to pressure difference changes, thereby blocking the connection between the intake channel and the first channel or blocking the connection between the intake channel and the second channel. At least one exhaust port connects the middle section of the internal space to the exhaust channel. When the valve blocks the connection between the intake channel and the first channel, gas enters the internal space via the reset channel. The internal space allows the hammer to move away from the impactor in the first direction; when the valve blocks the air intake channel from connecting to the second channel, gas enters the internal space through the first channel, causing the hammer to move closer to the impactor in the first direction; the main body further includes a first component and a second component. The first component has the internal space, and the second component includes a bottom wall and an annular side wall. The bottom wall has the insertion hole, and the annular side wall protrudes laterally from the bottom wall and is connected to the first component. Thus, the first component and the second component together form the impact chamber; when the impactor is positioned... In the second position, the impact member does not protrude from the insertion hole in the first direction; in the first direction, the length of the internal space is greater than the length of the impact chamber; the outer diameter of the shoulder is greater than the outer diameter of the hammer; the ring sidewall is screwed to the first member; the abutment is cylindrical, and the end face of the abutment is a circular plane; the insertion hole is a circular hole, the diameter of the insertion hole is greater than the outer diameter of the abutment, and the ratio of the diameter of the insertion hole to the outer diameter of the abutment is between 1.1 and 1.4, and when the abutment is inserted into the insertion hole, the two together define a gap; the insertion hole and the abutment are coaxially arranged. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0018] Figure 2 for Figure 1 The exploded diagram.

[0019] Figure 3 for Figure 2 Another perspective view.

[0020] Figure 4 This is a side cross-sectional view of the impact member in the first position according to an embodiment of the present invention.

[0021] Figure 5 This is a side cross-sectional view of the impact member in the second position according to an embodiment of the present invention.

[0022] Figure 6 and Figure 7 This is a side cross-sectional view of an embodiment of the present invention in actual use.

[0023] Figure 8 for Figure 6 A magnified view of a portion of the image.

[0024] Figure 9 for Figure 7 A magnified view of a portion of the image.

[0025] Figure 10 This is a top cross-sectional view of an embodiment of the present invention.

[0026] Wherein, 1: main body; 11: internal space; 12: impact chamber; 13: insertion hole; 14: first component; 15: second component; 151: bottom wall; 152: annular side wall; 21: air intake channel; 22: exhaust channel; 23: exhaust hole; 24: valve chamber; 25: first channel; 26: second channel; 27: reset channel; 28: valve; 29: gap; 3: impact component; 31: abutment part; 32: shoulder; 33: collision part; 4: hammering component; 51: first stop part; 52: second stop part; 61: first distance; 62: second distance; 7: first direction; 8: object to be impacted. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] The following examples illustrate possible implementations of this utility model, but are not intended to limit the scope of protection of this utility model. The prefixes "a" or "at least one" before the terms mentioned herein are not intended to limit the quantity. Depending on the requirements, there may also be "plural" items. This variation in quantity is also within the scope of protection, as will be stated in advance.

[0029] Please refer to Figures 1 to 10 The illustration shows an embodiment of the present invention. The impact tool of the present invention includes: a main body 1, an impact member 3 and a hammering member 4.

[0030] The main body 1 includes an internal space 11, an impact chamber 12, and a insertion hole 13 arranged sequentially along a first direction 7. The internal space 11 and the impact chamber 12 are interconnected, and the insertion hole 13 connects to the impact chamber 12 for an object to be impacted 8 (such as a bolt on a wheel hub) to pass through. More specifically, the main body 1 further includes a first component 14 and a second component 15. The first component 14 has the internal space 11, and the second component 15 includes a bottom wall 151 and an annular side wall 152. The bottom wall 151 has the insertion hole 13 passing through it, and the annular side wall 152 protrudes laterally from the bottom wall 151. The annular side wall 152 is attached to the first component 14. In this embodiment, the annular side wall 152 is screwed to the first component 14, thereby the first component 14 and the second component 15 together enclose the impact chamber 12. This assembly method simplifies the assembly process and facilitates maintenance and cleaning.

[0031] The impact member 3 is used to impact the object 8 to be impacted. The impact member 3 can be moved from a first position to a second position within the impact chamber 12 along the first direction 7. When the impact member 3 is in the first position, it does not protrude from the insertion hole 13 in the first direction 7 to provide sufficient space to accommodate the object 8 to be impacted, and a portion of the impact member 3 protrudes into the internal space 11 to withstand the impact of the hammer 4. In this embodiment, when the impact member 3 is in the second position, it also does not protrude from the insertion hole 13 in the first direction 7 to avoid interfering with external components and improve operational safety (preventing accidental impact).

[0032] The hammering component 4 is movably housed within the internal space 11 along the first direction 7 to hammer the impact component 3 and force it to move along the first direction 7, making the disassembly operation continuous and efficient, effectively reducing manpower burden. In this embodiment, the length of the internal space 11 in the first direction 7 is greater than the length of the impact chamber 12 to ensure that the hammering component 4 has sufficient time and stroke to generate a large impact force.

[0033] More specifically, the impact member 3 includes a backing portion 31, a shoulder portion 32, and a collision portion 33. The backing portion 31 is used to abut against the object to be impacted 8. The collision portion 33 is struck by the hammer 4. The shoulder portion 32 is connected between the backing portion 31 and the collision portion 33, and the outer diameter of the shoulder portion 32 is larger than the outer diameter of the backing portion 31. When the impact member 3 is in the first position, the shoulder portion 32 abuts against a first stop portion 51 surrounding the impact chamber 12 in the opposite direction 7. When the impact member 3 is in the second position, the shoulder portion 32 abuts against a second stop portion 52 surrounding the impact chamber 12 in the first direction 7. Through the mutual stopping design of the shoulder portion 32, the first stop portion 51, and the second stop portion 52, the movement stroke of the impact member 3 can be limited to prevent over-impact damage.

[0034] More specifically, the insertion hole 13 and the abutment portion 31 are coaxially arranged. The abutment portion 31 is cylindrical, and its end face is a circular plane to maximize the contact area with the object to be impacted 8. Furthermore, the diameter of the insertion hole 13 is not less than the outer diameter of the abutment portion 31, allowing the abutment portion 31 to extend into the internal space 11 when the impact member 3 moves toward the second position. In this embodiment, the insertion hole 13 is a circular hole, and the diameter of the insertion hole 13 is larger than the outer diameter of the abutment part 31. The larger insertion hole 13 allows more objects 8 of different radial dimensions to pass through, and the ratio of the diameter of the insertion hole 13 to the outer diameter of the abutment part 31 is between 1.1 and 1.4. When the abutment part 31 is inserted into the insertion hole 13, the two together define a gap 29. When the impact member 3 moves toward the second position, it helps to expel the air located in the impact chamber 12 and avoids generating air resistance.

[0035] Preferably, the outer diameter of the shoulder 32 is larger than the outer diameter of the hammer 4 to ensure that the shoulder 32 has a certain size ratio to maintain structural strength and contact area.

[0036] Alternatively, when the impact member 3 is in the second position, the collision part 33 remains protruding from the internal space 11, so that the collision part 33 is normally exposed to the stroke area of ​​the hammering member 4, which helps to continuously perform the hammering operation and achieve the purpose of continuous driving.

[0037] In another preferred embodiment, the length of the abutment portion 31 in the first direction 7 is less than the length of the collision portion 33 in the first direction 7, thereby limiting the length of the abutment portion 31 to be not too long, which is beneficial for identifying the installation direction during assembly, and allows for more leeway to accommodate the object to be impacted 8, and can also reduce eccentricity and dimensional errors during the production of the abutment portion 31.

[0038] The maximum movement of the impact member 3 in the first direction 7 is defined as a first distance 61, and the maximum movement of the hammer member 4 in the first direction 7 is defined as a second distance 62. The ratio of the first distance 61 to the second distance 62 is between 0.1 and 0.3. By using the above-mentioned appropriate stroke ratio, the concentration and transmission efficiency of impact kinetic energy can be enhanced, ensuring that the impact force is moderate and effective.

[0039] This impact tool uses high-pressure gas to drive the hammer 4 to reciprocate, eliminating the need for manual force application and significantly improving disassembly efficiency. In this embodiment, the main body 1 further includes an air intake channel 21, an exhaust channel 22, at least one exhaust port 23, a valve chamber 24, a first channel 25, a second channel 26, a reset channel 27, and a valve 28. The air intake channel 21 connects to the valve chamber 24, which in turn connects to the side of the internal space 11 away from the impact member 3 via the first channel 25. The valve chamber 24 also connects to the reset channel 27 via the second channel 26, which in turn connects to the side of the internal space 11 closer to the impact member 3. The valve 28 moves within the valve chamber 24 due to pressure differences, thereby blocking the air intake. The valve 28 connects the first channel 25 or blocks the connection between the intake channel 21 and the second channel 26. The at least one exhaust port 23 connects the middle section of the internal space 11 with the exhaust channel 22. When the valve 28 blocks the connection between the intake channel 21 and the first channel 25, gas enters the internal space 11 through the reset channel 27, causing the hammer 4 to move away from the impact member 3 in the opposite direction 7. When the valve 28 blocks the connection between the intake channel 21 and the second channel 26, gas enters the internal space 11 through the first channel 25, causing the hammer 4 to move along the first direction 7 and approach the impact member 3.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An impact tool characterized by comprising: include: A main body includes an internal space, an impact chamber and a insertion hole arranged sequentially along a first direction, the internal space and the impact chamber being interconnected, and the insertion hole being connected to the impact chamber for an object to be impacted to penetrate. An impactor, for impacting the object to be impacted, is movable from a first position to a second position within an impact chamber along a first direction. When the impactor is in the first position, it does not protrude from the insertion hole in the first direction, and a portion of the impactor extends into the internal space. A hammer is disposed in the internal space and is movable back and forth along the first direction to hammer the impact member and force it to move along the first direction.

2. The impact tool according to claim 1, characterized by The impact member includes a stop portion, a shoulder portion, and a collision portion. The stop portion is for abutting against the object to be impacted, and the collision portion is struck by the hammer. The shoulder portion is connected between the stop portion and the collision portion, and the outer diameter of the shoulder portion is larger than the outer diameter of the stop portion. When the impact member is in the first position, the shoulder portion abuts against a first stop portion surrounding the impact chamber in the opposite direction to the first position. When the impact member is in the second position, the shoulder portion abuts against a second stop portion surrounding the impact chamber in the first direction.

3. The impact tool according to claim 2, characterized in that, The diameter of the insertion hole is not less than the outer diameter of the abutment part, and when the impact member moves toward the second position, the abutment part can extend into the internal space.

4. The impact tool according to claim 2, characterized in that, When the impact member is in the second position, the impact portion remains protruding from the internal space.

5. The impact tool according to claim 2, characterized in that, The length of the abutting part in the first direction is less than the length of the colliding part in the first direction.

6. The impact tool according to claim 1, characterized in that, The maximum amount of movement of the impact member in the first direction is defined as a first distance, and the maximum amount of movement of the hammer member in the first direction is defined as a second distance, the ratio of the first distance to the second distance being between 0.1 and 0.

3.

7. The impact tool according to claim 1, characterized in that, The main body further includes an air intake channel, an exhaust channel, at least one exhaust port, a valve chamber, a first channel, a second channel, a reset channel, and a valve. The air intake channel connects to the valve chamber, which connects to the side of the internal space away from the impact member via the first channel. The valve chamber connects to the reset channel via the second channel, which connects to the side of the internal space near the impact member. The valve moves within the valve chamber by changing the pressure difference, thereby blocking the connection between the air intake channel and the first channel or blocking the connection between the air intake channel and the second channel. The at least one exhaust port connects the middle section of the internal space to the exhaust channel. When the valve blocks the connection between the air intake channel and the first channel, gas enters the internal space via the reset channel, causing the hammer to move in the opposite direction and away from the impact member. When the valve blocks the connection between the air intake channel and the second channel, gas enters the internal space via the first channel, causing the hammer to move in the first direction and approach the impact member.

8. The impact tool according to claim 1, characterized in that, The main body further includes a first component and a second component. The first component has the internal space, and the second component includes a bottom wall and an annular side wall. The bottom wall has the insertion hole, and the annular side wall protrudes laterally from the bottom wall. The annular side wall is connected to the first component, and thus the first component and the second component together enclose the impact chamber.

9. The impact tool according to any one of claims 1 to 8, characterized in that, When the impact member is in the second position, it does not protrude from the insertion hole in the first direction.

10. The impact tool according to claim 3, characterized in that, When the impact member is in the second position, the collision portion remains protruding from the internal space; the length of the abutment portion in the first direction is less than the length of the collision portion in the first direction; the maximum movement of the impact member in the first direction is defined as a first distance, and the maximum movement of the hammer in the first direction is defined as a second distance, the ratio of the first distance to the second distance being between 0.1 and 0.3; the main body further includes an air intake channel, an exhaust channel, at least one exhaust port, a valve chamber, a first channel, a second channel, a reset channel, and a valve. The valve chamber is connected to the internal space via a first channel, which connects to the side of the internal space away from the impact member. The valve chamber is also connected to the reset channel via a second channel, which connects to the side of the internal space near the impact member. The valve moves within the valve chamber due to pressure difference changes, thereby blocking the connection between the intake channel and the first channel or the second channel. At least one exhaust port connects the middle section of the internal space to the exhaust channel. When the valve blocks the connection between the intake channel and the first channel, gas enters the internal space via the reset channel, causing the impact... The impactor moves away from the impactor in the opposite direction of the first direction; when the valve blocks the air intake passage from the second passage, gas enters the internal space through the first passage, causing the impactor to move along the first direction and approach the impactor; the main body further includes a first component and a second component, the first component having the internal space, the second component having a bottom wall and an annular side wall, the bottom wall having the insertion hole, the annular side wall protruding laterally from the bottom wall, the annular side wall being joined to the first component, thereby the first component and the second component together enclosing the impact chamber; when the impactor is located in the second... In the position, the impact member does not protrude from the insertion hole in the first direction; in the first direction, the length of the internal space is greater than the length of the impact chamber; the outer diameter of the shoulder is greater than the outer diameter of the hammer; the ring sidewall is screwed to the first member; the abutment is cylindrical, and the end face of the abutment is a circular plane; the insertion hole is a circular hole, the diameter of the insertion hole is greater than the outer diameter of the abutment, and the ratio of the diameter of the insertion hole to the outer diameter of the abutment is between 1.1 and 1.4, and when the abutment is inserted into the insertion hole, the two together define a gap; the insertion hole and the abutment are coaxially configured.

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