Angular impact tool

Abstract

The invention discloses an angular impact tool, belongs to the field of electric tools, solves the problem that an existing impact tool is not suitable for a narrow space, and adopts the technical scheme that the angular impact tool mainly comprises a shell, a driver, an impact mechanism and a gear assembly are arranged in the shell, and the driver drives the impact mechanism through the gear assembly; the impact mechanism comprises a driving shaft, a hammer and an anvil block, the end, away from the anvil block, of the driving shaft is connected with a first gear, the first gear is in transmission connection with the gear assembly, a first mounting groove is formed in the middle of the first gear, the shell is provided with a supporting piece, the supporting piece is provided with a first protrusion extending into the first mounting groove, and the peripheral side of the first protrusion is sleeved with a first bearing; the first bearing is embedded into the first mounting groove, the outer side wall of the first bearing is matched with the inner side wall of the first mounting groove, and the supporting piece covers the first mounting groove. The whole structure is more compact and can be suitable for a narrow space.

Description

Technical Field

[0001] The invention discloses an angular impact tool, belonging to the technical field of electric tools. Background Art

[0002] In automobile maintenance, equipment maintenance and installation applications, in order to tighten or loosen fasteners, most users nowadays will think of using impact tools to achieve this. The impact tools can provide high torque and high impact force, which can effectively and quickly tighten or loosen fasteners, thereby achieving twice the result with half the effort.

[0003] The impact tool in the prior art usually includes a driver, an impact mechanism and a gear assembly. The impact mechanism includes a drive shaft. The drive shaft is provided with a gear that is transmission-connected to the gear assembly. The driver drives the gear to rotate through the gear assembly to realize the rotation of the drive shaft. In order to ensure that the rotation of the drive shaft remains stable, a bearing is installed in the housing. The end of the drive shaft extends toward the bearing and is inserted into the inner ring of the bearing. This design will cause a gap between the bearing and the gear, thereby increasing the overall length of the drive shaft, thereby increasing the size of the impact tool. In actual use, the disassembly space of most fasteners is relatively small. In order to facilitate the operation of the impact tool in a narrow space, an impact tool with a small size and high impact force is required. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing impact tools are not suitable for narrow spaces. To this end, an angular impact tool is provided, which can make the overall structure more compact and suitable for narrow spaces.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An angular impact tool comprises a shell, in which a driver, an impact mechanism and a gear assembly are arranged. The driver drives the impact mechanism through the gear assembly. The impact mechanism comprises a driving shaft, and a hammer and anvil rotating with the driving shaft. The anvil is connected to the end of the driving shaft and extends out of the shell. The end of the driving shaft away from the anvil is connected to a first gear, which is transmission-connected to the gear assembly. A first mounting groove is arranged in the middle of the first gear. The shell has a support member, which is provided with a first protrusion extending into the first mounting groove. A first bearing is mounted on the outer peripheral side of the first protrusion. The first bearing is embedded in the first mounting groove, and the outer side wall of the first bearing cooperates with the inner side wall of the first mounting groove. The support member covers the first mounting groove.

[0007] The beneficial effects of adopting the present invention are:

[0008] The end of the driving shaft in the present invention is provided with a first gear, the middle of the first gear is provided with a first mounting groove, the support is provided with a first protrusion, the inner ring of the first bearing is fixed on the outer peripheral side of the first protrusion, and the outer ring of the first bearing is fixed on the inner peripheral side of the first mounting groove. After the support is assembled with the driving shaft, the first bearing is embedded in the first gear, that is, the first bearing and the first gear are overlapped in the axial direction of the driving shaft, thereby reducing the spacing between the bearing and the first gear, making the assembly of the first gear and the first bearing more compact, and also shortening the length of the driving shaft, thereby reducing the space occupied by the driving shaft, so as to achieve the effect of reducing the overall volume of the impact tool, so that the impact tool can be suitable for narrow space; in addition, the first protrusion is arranged on the support, which can enhance the strength of the support, so that the support has a stronger supporting capacity, thereby extending the service life of the support, and also can make the rotation of the driving shaft more stable and reliable, thereby improving the assembly accuracy of the driving shaft and the support; secondly, when the support is assembled with the driving shaft, the support can cover the first mounting groove, thereby limiting the first bearing from being separated from the first mounting groove, so that the assembly of the first bearing with the driving shaft and the support is more stable and reliable.

[0009] Preferably, the housing includes an end cap, which is detachably connected to a side of the housing away from the anvil, and the end cap is the support member, and the first protrusion is located on the side of the end cap facing the inside of the housing. With the above technical solution, the first protrusion is arranged on the end cap, so that the end cap can be directly used as a support member and assembled with the drive shaft. The end cap and the support member are integrated into one piece, which can further reduce the occupied space, thereby reducing the overall volume of the impact tool, so that the impact tool can be used in narrow spaces, and the scope of application of the impact tool is improved.

[0010] Preferably, the housing includes an end cover, which is detachably connected to a side of the housing away from the anvil, and the inner wall of the housing is provided with a support platform, and the support member is positioned between the support platform and the end cover, and the support member abuts against the end cover. By adopting the above technical solution, the housing positions the support member through the support platform and the end cover, so that the support member can abut against the end cover, and the end cover can support the support member, which can further improve the support capacity of the support member and make the support of the drive shaft by the support member more stable and reliable.

[0011] Preferably, the gear assembly comprises an intermediate shaft and a transmission shaft which are transmission-connected, the intermediate shaft is transmission-connected to the output shaft of the driver, and the transmission shaft is transmission-connected to the drive shaft.

[0012] Preferably, a second gear is fixed to the end of the transmission shaft, the second gear meshes with the first gear, a second mounting groove is provided in the middle of the second gear, a second protrusion is provided on the support member extending into the second mounting groove, a second bearing is sleeved on the outer peripheral side of the second protrusion, and the outer side wall of the second bearing cooperates with the inner side wall of the second mounting groove. With the above-mentioned technical solution, a second mounting groove is provided in the second gear, and the second bearing is embedded in the second mounting groove, so that the second gear and the second bearing are overlapped in the axial direction of the transmission shaft, which can reduce the distance between the second gear and the second bearing, and also reduce the length of the transmission shaft, thereby reducing the volume of the housing, so that the impact tool can be suitable for narrow working spaces.

[0013] Preferably, the output shaft of the drive has a first rotation axis, the drive shaft has a second rotation axis, the intermediate shaft has a third rotation axis, and the transmission shaft has a fourth rotation axis, wherein the first rotation axis is parallel to the third rotation axis, the second rotation axis is parallel to the fourth rotation axis, and the second rotation axis is perpendicular to the first rotation axis.

[0014] Preferably, the distance between the first rotation axis and the third rotation axis is A, and 10mm≤A≤20mm; the distance between the second rotation axis and the fourth rotation axis is B, and 25mm≤B≤50mm. The above technical solution can keep a small distance between the first rotation axis and the third rotation axis, and can also keep a small distance between the second rotation axis and the fourth rotation axis, thereby making the components inside the shell more compact, improving the utilization rate of the internal space of the shell, and thus reducing the overall volume of the shell, making the impact tool more compact.

[0015] Preferably, the intermediate shaft is close to the side of the housing away from the support member. By adopting the above technical solution, the intermediate shaft and the support member are respectively arranged on both sides of the housing, that is, the output shaft of the driver can be located in the middle of the housing, and the intermediate shaft and the support member can be distributed on both sides of the output shaft, so that the center of gravity of the internal parts of the impact tool is more evenly distributed, which can provide users with a better use feel.

[0016] Preferably, the housing includes a main housing and a head housing, the head housing is rotatably connected to the end of the main housing, the length direction of the housing is parallel to the first rotation axis, a start button is provided on the main housing, and the gear assembly and the impact mechanism are arranged in the head housing. With the above technical solution, the main housing and the head housing can rotate relative to each other, the user holds the main housing and controls the start of the impact mechanism in the housing through the start button, and the user maintains the best grip while allowing the impact mechanism to align with fasteners in multiple directions, which can significantly improve the user experience of the impact tool.

[0017] Preferably, the first gear and the drive shaft are an integrated structure or a split structure.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 A side view of an angular impact tool of the present invention;

[0021] Figure 2 A head shell of an angular impact tool of the present invention;

[0022] Figure 3 A cross-sectional view of an angular impact tool of the present invention;

[0023] Figure 4 The figure is an exploded view of an angle impact tool according to the present invention.

[0024] Figure markings: 1. shell; 11. main shell; 111. start button; 12. head shell; 121. end cover; 122. support platform; 13. power module; 2. driver; 21. output shaft; 211. first rotation axis; 31. intermediate shaft; 311. third rotation axis; 32. transmission shaft; 321. fourth rotation axis; 33. second gear; 331. second mounting groove; 41. drive shaft; 42. first gear; 421. first mounting groove; 43. anvil; 44. hammer; 45. second rotation axis; 5. support member; 51. first protrusion; 52. first bearing; 53. second protrusion; 54. second bearing. DETAILED DESCRIPTION

[0025] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figures 1 to 4 As shown, this embodiment shows an angular impact tool, including a shell 1 and a power module 13, wherein a driver 2, an impact mechanism and a gear assembly are arranged in the shell 1, wherein the shell 1 includes a main shell 11 and a head shell 12, the head shell 12 is connected to the end of the main shell 11, the power module 13 is detachably mounted at the end of the main shell 11 away from the head shell 12, the driver 2 is mounted at the connection between the main shell 11 and the head shell 12, and the main body of the driver 2 is in the main shell 11, the output shaft 21 of the driver 2 extends into the head shell 12, the output shaft 21 of the driver 2 has a first rotation axis 211, after the driver 2 is started, the output shaft 21 rotates around the first rotation axis 211, the length direction of the shell 1 is kept parallel to the first rotation axis 211, and the gear assembly and the impact mechanism are both mounted in the head shell 12.

[0030] In this embodiment, the driver 2 drives the impact mechanism through a gear assembly. The impact mechanism includes a driving shaft 41, and a hammer 44 and an anvil 43 that rotate with the driving shaft 41. The anvil 43 is connected to the end of the driving shaft 41 and extends out of the shell 1. The end of the driving shaft 41 away from the anvil 43 is connected to a first gear 42, and the first gear 42 is transmission-connected to the gear assembly. A first mounting groove 421 is provided in the middle of the first gear 42. The shell 1 has a support member 5, and the support member 5 is provided with a first protrusion 51 extending into the first mounting groove 421. A first bearing 52 is mounted on the outer peripheral side of the first protrusion 51. The first bearing 52 is embedded in the first mounting groove 421, and the outer wall of the first bearing 52 cooperates with the inner wall of the first mounting groove 421. The support member 5 covers the first mounting groove 421.

[0031] In this embodiment, the end of the driving shaft 41 is provided with a first gear 42, the middle of the first gear 42 is provided with a first mounting groove 421, the support member 5 is provided with a first protrusion 51, the inner ring of the first bearing 52 is fixed on the outer peripheral side of the first protrusion 51, and the outer ring of the first bearing 52 is fixed on the inner peripheral side of the first mounting groove 421. After the support member 5 is assembled with the driving shaft 41, the first bearing 52 is embedded in the first gear 42, that is, the first bearing 52 and the first gear 42 are overlapped in the axial and radial directions of the driving shaft 41, thereby reducing the distance between the bearing and the first gear 42, making the assembly of the first gear 42 and the first bearing 52 more compact, and also shortening the length of the driving shaft 41, thereby reducing The space occupied by the drive shaft 41 can achieve the effect of reducing the overall volume of the impact tool, so that the impact tool can be suitable for narrow spaces; in addition, the first protrusion 51 is set on the support member 5, which can enhance the strength of the support member 5, so that the support member 5 has a stronger supporting ability, thereby extending the service life of the support member 5, and at the same time, it can also make the rotation of the drive shaft 41 more stable and reliable, thereby improving the assembly accuracy of the drive shaft 41 and the support member 5; secondly, when the support member 5 is assembled with the drive shaft 41, the support member 5 can cover the first mounting groove 421, thereby limiting the first bearing 52 from being separated from the first mounting groove 421, making the assembly of the first bearing 52 with the drive shaft 41 and the support member 5 more stable and reliable.

[0032] like Figure 3 and Figure 4 As shown, in this embodiment, a cavity for installing a gear assembly and an impact mechanism is formed inside the head shell 12, and the cavity forms an opening on one of the side walls of the head shell 12. The head shell 12 is provided with a perforation on the side wall opposite to the opening, and the anvil 43 in the impact mechanism passes through the side wall from the cavity through the perforation and extends to the outside of the head shell 12. The head shell 12 also includes an end cover 121, which is detachably connected to the head shell 12 and is used to block the opening. A support platform 122 is provided on the inner wall of the head shell 12, and the surface of the support platform 122 faces the end cover 121, and the support platform 122 is connected to the end cover 121. 1, a support member 5 is provided in the cavity of the head shell 12, the edge of the support member 5 is clamped between the support platform 122 and the end cover 121, and after the end cover 121 is assembled, the support member 5 abuts against the end cover 121, and the first protrusion 51 is provided on the side of the support member 5 facing away from the end cover 121, and the shell 1 positions the support member 5 through the support platform 122 and the end cover 121, so that the support member 5 can abut against the end cover 121, and the end cover 121 can support the support member 5, which can further improve the supporting capacity of the support member 5, and make the support of the support member 5 to the drive shaft 41 more stable and reliable.

[0033] like Figure 3 and Figure 4As shown, the gear assembly in this embodiment includes an intermediate shaft 31 and a transmission shaft 32, wherein the intermediate shaft 31 is transmission-connected with the output shaft 21 of the driver 2, a bevel gear is provided at the end of the intermediate shaft 31 away from the output shaft 21, and a bevel gear is also fixed to the outer peripheral side of the transmission shaft 32, the bevel gear of the intermediate shaft 31 and the bevel gear of the transmission shaft 32 are meshed with each other, a second gear 33 is provided at the end of the transmission shaft 32, and the second gear 33 and the first gear 42 are meshed with each other, after the driver 2 is started, the intermediate shaft 31 is driven to rotate, the intermediate shaft 31 drives the transmission shaft 32 to rotate through the bevel gear, and the transmission shaft 32 drives the drive shaft 41 to rotate through the second gear 33 and the first gear 42.

[0034] In this embodiment, the drive shaft 41 has a second rotation axis 45, and the drive shaft 41 rotates around the second rotation axis. The intermediate shaft 31 has a third rotation axis 311, and the intermediate shaft 31 rotates around the third rotation axis 311. The transmission shaft 32 has a fourth rotation axis 321, and the transmission shaft 32 rotates around the fourth rotation axis 321, wherein the first rotation axis 211 is parallel to the third rotation axis 311, the second rotation axis 45 is parallel to the fourth rotation axis 321, the first rotation axis 211 is perpendicular to the second rotation axis 45, and the first rotation axis 211 is perpendicular to the third rotation axis 321. The spacing between the moving axes 311 is A, and 10mm≤A≤20mm; the spacing between the second rotating axis 45 and the fourth rotating axis 321 is B, and 25mm≤B≤50mm. The above design can maintain a smaller spacing between the first rotating axis 211 and the third rotating axis 311, and can also maintain a smaller spacing between the second rotating axis 45 and the fourth rotating axis 321, thereby making the components inside the shell 1 more compact, improving the utilization rate of the internal space of the shell 1, and thereby reducing the overall volume of the shell 1, making the impact tool more compact.

[0035] like Figure 3 As shown, in this embodiment, a second gear 33 is fixed to the end of the transmission shaft 32, and the second gear 33 is meshed with the first gear 42. A second mounting groove 331 is provided in the middle of the second gear 33, and the support member 5 is provided with a second protrusion 53 extending into the second mounting groove 331. A second bearing 54 is sleeved on the outer peripheral side of the second protrusion 53, and the outer wall of the second bearing 54 cooperates with the inner wall of the second mounting groove 331. After the support member 5 is assembled with the transmission shaft 32, the support member 5 covers the second mounting groove 331, and a second mounting groove 331 is provided in the second gear 33. The second bearing 54 is embedded in the second mounting groove 331, so that the second gear 33 and the second bearing 54 remain overlapped in the axial and radial directions of the transmission shaft 32, which can reduce the distance between the second gear 33 and the second bearing 54, and also reduce the length of the transmission shaft 32, thereby reducing the volume of the housing 1, so that the impact tool can be suitable for narrow working spaces.

[0036] Of course, it is understandable that in other embodiments, the end cover 121 can also be directly used as the support member 5. The first protrusion 51 is on the side of the end cover 121 facing the inside of the shell 1. The first protrusion 51 is arranged on the end cover 121, so that the end cover 121 can be directly used as the support member 5 and assembled with the drive shaft 41. The end cover 121 and the support member 5 are integrated into one piece, which can further reduce the occupied space and thus reduce the overall volume of the impact tool, so that the impact tool can be used in narrow spaces, thereby improving the scope of application of the impact tool.

[0037] In addition, in the present embodiment, the first gear 42 and the drive shaft 41 are an integrated structure, and the second gear 33 and the transmission shaft 32 are an integrated structure; of course, it is understandable that in other embodiments, the first gear 42 and the drive shaft 41 may also be a split structure, and similarly the second gear 33 and the transmission shaft 32 may also be a split structure.

[0038] like Figure 3 As shown, the intermediate shaft 31 in this embodiment is close to the side wall where the perforation is located, that is, the support member 5 and the intermediate shaft 31 are respectively arranged on both sides of the shell 1, so that the output shaft 21 of the driver 2 can be in the middle of the shell 1, and the intermediate shaft 31 and the support member 5 can be distributed on both sides of the output shaft 21, so that the center of gravity of the internal parts of the impact tool is more evenly distributed, which can provide users with a better use feel.

[0039] like Figure 1 As shown, in this embodiment, a start button 111 is provided on the side wall of the main shell 11, and the user controls the start of the driver 2 by pressing the start button 111. In this embodiment, the main shell 11 and the head shell 12 are fixedly connected by fasteners, and the start button 111 and the anvil 43 are arranged on the same side of the shell 1; of course, it can be understood that in other embodiments, the main shell 11 and the head shell 12 can also be rotatably connected, and the main shell 11 and the head shell 12 can rotate relative to each other. The user holds the main shell 11 and controls the start of the impact mechanism in the shell 1 by the start button 111. While the user maintains the best grip, the impact mechanism can be aligned with fasteners in multiple directions, which can significantly improve the user experience of the impact tool.

[0040] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. An angular impact tool, comprising a housing, a driver, an impact mechanism and a gear assembly are arranged in the housing, the driver drives the impact mechanism through the gear assembly, the impact mechanism comprises a drive shaft, and a hammer and anvil rotating with the drive shaft, the anvil is connected to the end of the drive shaft and extends out of the housing, characterized in that: The end of the drive shaft away from the anvil is connected to a first gear, the first gear is in transmission connection with the gear assembly, a first mounting groove is provided in the middle of the first gear, the shell has a support member, the support member is provided with a first protrusion extending into the first mounting groove, a first bearing is mounted on the outer peripheral side of the first protrusion, the first bearing is embedded in the first mounting groove, and the outer side wall of the first bearing cooperates with the inner side wall of the first mounting groove, and the support member covers the first mounting groove.

2. An angular impact tool according to claim 1, characterized in that: The shell comprises an end cover which is detachably connected to a side of the shell away from the anvil, the end cover being the support member, and the first protrusion being located on a side of the end cover facing the inside of the shell.

3. An angular impact tool according to claim 1, characterized in that: The shell comprises an end cover which is detachably connected to a side of the shell away from the anvil. The inner side wall of the shell is provided with a support platform. The support member is positioned between the support platform and the end cover, and the support member abuts against the end cover.

4. An angular impact tool according to claim 1, characterized in that: The gear assembly comprises an intermediate shaft and a transmission shaft which are transmission-connected. The intermediate shaft is transmission-connected to the output shaft of the driver, and the transmission shaft is transmission-connected to the drive shaft.

5. An angular impact tool according to claim 4, characterized in that: A second gear is fixed to the end of the transmission shaft, the second gear is meshed with the first gear, a second mounting groove is provided in the middle of the second gear, the support member is provided with a second protrusion extending into the second mounting groove, a second bearing is mounted on the outer peripheral side of the second protrusion, and the outer side wall of the second bearing cooperates with the inner side wall of the second mounting groove.

6. An angular impact tool according to claim 5, characterized in that: The output shaft of the driver has a first rotation axis, the drive shaft has a second rotation axis, the intermediate shaft has a third rotation axis, and the transmission shaft has a fourth rotation axis, wherein the first rotation axis is parallel to the third rotation axis, the second rotation axis is parallel to the fourth rotation axis, and the second rotation axis is perpendicular to the first rotation axis.

7. An angular impact tool according to claim 6, characterized in that: The distance between the first rotation axis and the third rotation axis is A, and 10mm≤A≤20mm; the distance between the second rotation axis and the fourth rotation axis is B, and 25mm≤B≤50mm.

8. An angular impact tool according to claim 1, characterized in that: The intermediate shaft is close to a side of the housing far away from the support member.

9. An angular impact tool according to claim 1, characterized in that: The shell comprises a main shell and a head shell, the head shell is rotatably connected to the end of the main shell, the length direction of the shell is parallel to the first rotation axis, a start button is provided on the main shell, and a gear assembly and an impact mechanism are arranged in the head shell.

10. An angular impact tool according to claim 1, characterized in that: The first gear and the driving shaft are of an integrated structure or a split structure.

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