Miniature straight-handle rotary striking tool

Abstract

The utility model discloses a miniature straight-handle rotary striking tool which is characterized in that a first shell extends along a first direction, and a first accommodating cavity extending along the first direction is defined by the first shell; the clamping assembly is rotatably arranged in the first accommodating cavity and is suitable for being connected with a front-end tool; the driving assembly is arranged in the first accommodating cavity; the hammering block is in transmission connection with the driving assembly, the hammering block is movably arranged in the first containing cavity between a connecting position and a separating position in the first direction, the hammering block located at the connecting position is connected with the clamping assembly so as to drive the clamping assembly to rotate, and the hammering block located at the separating position is separated from the clamping assembly; the elastic piece is located in the first containing cavity and connected with the hammering block, the elastic piece can drive the hammering block to move from the separation position to the connection position, and the clamping assembly, the hammering block and the driving assembly are sequentially arranged in the first direction. The miniature straight-handle rotary striking tool can adapt to fine operation with large torque.

Description

Technical Field

[0001] The utility model relates to the technical field of screw piece operation equipment, in particular to a miniature straight-handle rotary striking tool. Background Art

[0002] Rotary striking tools, also known as screwdrivers, are used to tighten and loosen threaded parts such as bolts and screws.

[0003] Existing large screwdrivers have large torque, but are large in size and cannot adapt to fine operations. Existing micro screwdrivers are small in size and can adapt to fine operations, but have too little torque and cannot be used in high-torque operations. Therefore, existing screwdrivers cannot adapt to high-torque fine operations. Utility Model Content

[0004] The purpose of the present invention is to at least solve the problem that existing screwdrivers cannot adapt to fine work with high torque. This purpose is achieved by:

[0005] The present invention provides a miniature straight-handle rotary striking tool, comprising a first housing, a clamping assembly, a driving assembly, a hammer block, and an elastic member. The first housing extends along a first direction, defining a first accommodating cavity extending along the first direction; the clamping assembly is rotatably disposed in the first accommodating cavity and adapted to be connected to the front end tool; the driving assembly is disposed in the first accommodating cavity; the hammer block is transmission-connected to the driving assembly, the hammer block being movably disposed in the first accommodating cavity between a connected position and a disconnected position along the first direction; the hammer block in the connected position is connected to the clamping assembly to drive the clamping assembly to rotate, and the hammer block in the disconnected position is disconnected from the clamping assembly, and the hammer block is configured to move from the connected position to the disconnected position when the rotation of the clamping assembly is blocked; the elastic member is disposed in the first accommodating cavity and connected to the hammer block, the elastic member being configured to drive the hammer block from the disconnected position to the connected position, wherein the clamping assembly, the hammer block, and the driving assembly are sequentially disposed in the first direction.

[0006] According to the miniature straight-shank rotary striking tool of the present invention, by increasing the spatial utilization of the first accommodating cavity relative to the first housing, and by increasing the spatial utilization of the clamping assembly, hammer block, and drive assembly relative to the first accommodating cavity, the overall size of the miniature straight-shank rotary striking tool can be reduced. The hammer block can strike an obstructed clamping assembly, thereby increasing the torque and torsional force output by the clamping assembly. Thus, the miniature straight-shank rotary striking tool of the present invention can be reduced in overall size while providing greater torque to accommodate high-torque precision operations.

[0007] In addition, the miniature straight-handled rotary striking tool according to the present invention may also have the following additional technical features:

[0008] In some embodiments of the present invention, the maximum diameter of the hammer block is less than 36 mm and greater than 22 mm, and the drive assembly includes a motor, and the maximum diameter of the motor is less than 36 mm and greater than 22 mm.

[0009] In some embodiments of the present invention, the driving assembly also includes a central shaft connected to the motor transmission, the hammer block is sleeved outside the central shaft and can rotate relative to the central shaft; the outer circumferential surface of the central shaft is provided with a guide structure, and the inner circumferential surface of the hammer block is provided with a limiting structure, the connecting piece is slidably provided on the guide structure and connected to the limiting structure, the axial direction of the central shaft is parallel to the first direction, and the first direction and the circumferential direction of the central shaft both intersect with the extension direction of the guide structure; when the connection position is in the connection position and the rotation of the clamping assembly is blocked, the connecting piece can slide on the guide structure and drive the hammer block to move toward the separation position.

[0010] In some embodiments of the present invention, the guide structure includes a first slide groove, the limiting structure includes a second slide groove, the first direction and the circumferential direction of the center axis both intersect with the extension direction of the first slide groove, and the first direction and the circumferential direction of the center axis both intersect with the extension direction of the second slide groove, and the connecting member is configured as a rolling ball that can be rolled in the first slide groove and the second slide groove; in the connected position, the rolling ball is located at one end of the first slide groove close to the clamping assembly and at one end of the second slide groove away from the clamping assembly; in the separated position, the rolling ball is located at one end of the first slide groove away from the clamping assembly and at one end of the second slide groove close to the clamping assembly.

[0011] In some embodiments of the present invention, the guide structure also includes a first slot and a third slide groove, the first slot is located between the first slide groove and the third slide groove along the radial direction of the center axis and is respectively connected to the first slide groove and the third slide groove, and the first slide groove and the third slide groove are symmetrically arranged with the central axis of the first slot as the symmetry axis.

[0012] In some embodiments of the present invention, the limiting structure also includes a second slot and a fourth slide groove, the second slot is located between the second slide groove and the fourth slide groove along the radial direction of the center axis and is respectively connected to the second slide groove and the fourth slide groove, and the second slide groove and the fourth slide groove are symmetrically arranged with the central axis of the second slot as the symmetry axis.

[0013] In some embodiments of the present invention, the hammer block includes a hammer body, and along the first direction, the hammer body is provided with a first annular protrusion and a second annular protrusion on the end surface facing the elastic member, and the first protrusion is arranged outside the second protrusion and defines an annular groove between the first protrusion and the second protrusion; the miniature straight-handle rotary striking tool also includes an abutment plate and a plurality of ball bearings arranged in the annular groove, and along the first direction, the abutment plate is located between the ball bearings and the elastic member and abuts against both of them respectively.

[0014] In some embodiments of the present invention, the hammer block includes a first abutment portion, and the clamping assembly is provided with a second abutment portion. When the hammer block is located in the connection position, the first abutment portion and the second abutment portion abut in the circumferential direction of the hammer block. When the hammer block is located in the separation position, the first abutment portion and the second abutment portion are separated.

[0015] In some embodiments of the present invention, the miniature straight-handle rotary striking tool also includes a second shell and a circuit assembly, the second shell is located on the side of the first shell close to the drive assembly and is connected to the first shell, the second shell defines a second accommodating cavity, the circuit assembly is arranged in the second accommodating cavity and is electrically connected to the drive assembly, the second shell and the second accommodating cavity both extend along a second direction, and the second direction is parallel to or at an angle to the first direction.

[0016] In some embodiments of the present invention, the circuit assembly includes a battery and a circuit board, and the battery and the circuit board are arranged relative to each other in a third direction, and the third direction is perpendicular to the second direction; and / or, along the first direction, as the clamping assembly approaches the drive assembly, the radial dimension of the first shell increases, and along the second direction, as the drive assembly approaches the circuit assembly, the radial dimension of the second shell increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components.

[0018] Figure 1 A schematic diagram of a miniature straight-handle rotary striking tool according to an embodiment of the present invention;

[0019] Figure 2 A partial schematic diagram of a miniature straight-handled rotary striking tool according to an embodiment of the present utility model;

[0020] Figure 3for Figure 2 Partial schematic diagram of a medium to micro-sized straight-handled rotary striking tool;

[0021] Figure 4 for Figure 3 Partial schematic diagram of a medium to micro-sized straight-handled rotary striking tool;

[0022] Figure 5 for Figure 3 A half-section view of a medium-sized and micro-sized straight-handled rotary striking tool;

[0023] Figure 6 A schematic diagram of a hammer block according to an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of the central axis of an embodiment of the present utility model;

[0025] Figure 8 A half-section schematic diagram of a clamping assembly according to an embodiment of the present invention;

[0026] Figure 9 A schematic diagram of a deceleration component according to an embodiment of the present invention;

[0027] Figure 10 A schematic diagram showing another perspective of the central axis of an embodiment of the present invention;

[0028] Figure 11 A schematic diagram of a hammer block according to an embodiment of the present invention from another perspective;

[0029] Figure 12 A half-section view of a hammer block according to an embodiment of the present invention;

[0030] Figure 13 This is a partial wireframe diagram of the cooperation between the hammer block and the central shaft according to an embodiment of the present utility model.

[0031] The reference numerals in the accompanying drawings represent the following:

[0032] 100. Micro straight handle rotary striking tool;

[0033] 1. First housing; 11. Accommodation cavity;

[0034] 2. Clamping assembly; 21. Second abutment portion; 22. Output shaft; 221. Shaft body; 222. Mounting slot; 23. Connecting sleeve; 231. Sleeve body; 232. Protrusion; 233. Slot body; 24. Spring; 25. Ball stop; 26. Mounting block; 27. Spring slot;

[0035] 3. Drive assembly; 31. Motor; 311. Transmission shaft; 32. Center shaft; 321. Guide structure; 3212. First slot; 3213. First chute; 3214. Third chute; 322. Shaft hole; 331. Connector; 34. Speed reduction member; 341. Gear; 342. Outer gear ring; 343. Connecting shaft;

[0036] 4. Hammer block; 41. First protrusion; 42. Second protrusion; 43. Annular groove; 44. Ball bearing; 45. Abutment plate; 46. First abutment; 47. Position limiting structure; 471. Second chute; 472. Fourth chute; 473. Second slot; 48. Hammer body;

[0037] 5. Elastic parts;

[0038] 6. Second housing; 61. Second accommodating cavity;

[0039] 7. Circuit assembly; 71. Battery; 72. Circuit board;

[0040] a. First direction; b. Second direction. DETAILED DESCRIPTION

[0041] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0042] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0043] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments. In the description of the present utility model, the meaning of "multiple" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0044] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is rotated, an element described as "below" or "beneath" another element or feature would subsequently be oriented "above" or "above" the other element or feature. Thus, the example term "below" can encompass both above and below orientations.

[0045] In the description of this embodiment, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0046] In this embodiment, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In order to at least solve the problem that existing screwdrivers cannot adapt to high-torque fine work, the embodiment of the utility model provides a miniature straight-handled rotary striking tool 100 that can reduce the overall size and has a larger torque to adapt to high-torque fine work.

[0048] The miniature straight-handle rotary striking tool 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0049] Combine Figure 1 and Figure 2 As shown, the miniature straight-handle rotary striking tool 100 of the embodiment of the present invention includes a first housing 1 , a clamping assembly 2 , a driving assembly 3 , a hammer block 4 and an elastic member 5 . The first shell 1 extends along the first direction a, and the first shell 1 defines a first accommodating cavity 11 extending along the first direction a; the clamping assembly 2 is rotatably disposed in the first accommodating cavity 11 and is suitable for being connected to the front-end tool; the driving assembly 3 is disposed in the first accommodating cavity 11; the hammer block 4 is transmission-connected to the driving assembly 3, and the hammer block 4 is movably disposed in the first accommodating cavity 11 between a connection position and a separation position along the first direction a, the hammer block 4 at the connection position is connected to the clamping assembly 2 so as to be able to drive the clamping assembly 2 to rotate, and the hammer block 4 at the separation position is separated from the clamping assembly 2, and the hammer block 4 is configured to move from the connection position to the separation position when the rotation of the clamping assembly 2 is blocked; the elastic member 5 is located in the first accommodating cavity 11 and connected to the hammer block 4, and the elastic member 5 is configured to be able to drive the hammer block 4 to move from the separation position to the connection position, wherein the clamping assembly 2, the hammer block 4 and the driving assembly 3 are arranged in sequence in the first direction a.

[0050] The first shell 1 extends along the first direction a, which means that the length direction of the first shell 1 is parallel to the first direction a, that is, the main shape of the first shell 1 is a straight line, such as a cylinder, a truncated cone, a rectangular parallelepiped, etc. The first accommodating cavity 11 extends along the first direction a, which means that the length direction of the first accommodating cavity 11 is parallel to the first direction a, that is, the main shape of the first accommodating cavity 11 is a straight line, such as a cylinder, a truncated cone, a rectangular parallelepiped, etc. The extension directions of the first shell 1 and the first accommodating cavity 11 are consistent so as to increase the space utilization rate of the first accommodating cavity 11 to the first shell 1. The clamping assembly 2, the hammer block 4 and the driving assembly 3 are arranged in sequence in the first direction a, that is, the setting direction of the clamping assembly 2, the hammer block 4 and the driving assembly 3 is consistent with the extension direction of the first accommodating cavity 11, so that the space in the first accommodating cavity 11 can be better utilized.

[0051] Therefore, by increasing the space utilization of the first accommodating cavity 11 to the first shell 1, and by increasing the space utilization of the clamping assembly 2, the hammer block 4 and the driving assembly 3 to the first accommodating cavity 11, the overall size of the miniature straight-handle rotary striking tool 100 can be reduced.

[0052] The clamping assembly 2 is suitable for being connected to a front-end tool. The front-end tool can be a tool suitable for disassembling and installing threaded parts. The clamping assembly 2 is connected to the front-end tool. Under the rotation of the clamping assembly 2, the threaded parts can be tightened and loosened.

[0053] When the rotation of the clamping assembly 2 is obstructed, the rotation of the hammer block 4 at the connection position is obstructed by the obstruction of the clamping assembly 2. The hammer block 4 moves along the first direction a from the connection position to the separation position, and finally moves to the separation position. The hammer block 4 at the separation position is separated from the clamping assembly 2 to be able to escape the obstruction of the clamping assembly 2. The hammer block 4 at the separation position rotates under the driving action of the driving assembly 3. The elastic member 5 drives the rotating hammer block 4 to move from the separation position to the connection position along the first direction a. When the rotating hammer block 4 moves to the connection position, it strikes the clamping assembly 2, thereby increasing the output torque of the clamping assembly 2. When the rotation of the clamping assembly 2 is obstructed and no contact is made, the hammer block 4 repeats the above movement process to repeatedly strike the clamping assembly 2, thereby ultimately increasing the torsion and torque output by the clamping assembly 2.

[0054] The miniature straight-shank rotary striking tool 100 of the present invention reduces its overall size by increasing the space utilization of the first accommodating cavity 11 relative to the first housing 1, and by increasing the space utilization of the clamping assembly 2, hammer block 4, and drive assembly 3 relative to the first accommodating cavity 11. The hammer block 4 can strike an obstructed clamping assembly 2, thereby increasing the torque and torsional force output by the clamping assembly 2. Thus, the miniature straight-shank rotary striking tool 100 of the present invention reduces its overall size while providing greater torque to accommodate high-torque precision operations.

[0055] In some embodiments, the maximum diameter of the hammer block 4 is less than 36 mm and greater than 22 mm, and the drive assembly 3 includes a motor 31, and the maximum diameter of the motor 31 is less than 36 mm and greater than 22 mm, thereby reducing the overall size of the miniature straight-shank rotary striking tool 100. For example, the gripping circumference of the miniature straight-shank rotary striking tool 100 can be between 60 mm and 145 mm, which is convenient for gripping, and the weight of the miniature straight-shank rotary striking tool 100 can be reduced. For example, the weight can be reduced to less than 800 grams, thereby reducing the burden on the operator.

[0056] Combine Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 、 Figure 11 、 Figure 12 and Figure 13 As shown, in some embodiments, the driving assembly 3 also includes a central shaft 32 that is transmission-connected to the motor 31, and the hammer block 4 is sleeved on the outside of the central shaft 32 and can rotate relative to the central shaft 32; the outer circumferential surface of the central shaft 32 is provided with a guide structure 321, and the inner circumferential surface of the hammer block 4 is provided with a limiting structure 47, and the connecting member 331 is slidably provided on the guide structure 321 and connected to the limiting structure 47, the axial direction of the central shaft 32 is parallel to the first direction a, and the first direction a and the circumferential direction of the central shaft 32 both intersect with the extension direction of the guide structure 321; when in the connected position and the rotation of the clamping assembly 2 is blocked, the connecting member 331 can slide on the guide structure 321 and drive the hammer block 4 to move toward the separation position, so as to realize the movement of the clamping assembly 2 from the connected position to the separation position when the rotation is blocked.

[0057] The connecting member 331 is connected to the limiting structure 47 so that the hammer block 4 can be driven to rotate through the connecting member 331. The connecting member 331 is slidably disposed within the guide structure 321 so that the guide structure 321 can guide the movement of the hammer block 4. When the rotation of the clamping assembly 2 is blocked, the hammer block 4 moves along the guide structure 321 toward the separation position, thereby achieving movement from the connection position to the separation position when the clamping assembly 2 is blocked. Under the action of the elastic member 5, the hammer block 4 moves along the guide structure 321 toward the connection position, making the movement of the hammer block 4 more precise.

[0058] Combine Figure 7 、 Figure 11 、 Figure 12 and Figure 13 As shown, in some embodiments, the guide structure 321 includes a first slide groove 3213, the limiting structure 47 includes a second slide groove 471, and the connecting member 331 is configured as a rolling ball that can be rolled in the first slide groove 3213 and the second slide groove 471. By making the connecting member 331 a rolling ball, it is easy to slide in the first slide groove 3213 and the second slide groove 471.

[0059] The first direction a and the circumferential direction of the central axis 32 both intersect with the extension direction of the first chute 3213. In other words, the first direction a and the circumferential direction of the central axis 32 both form an angle with the extension direction of the first chute 3213, and neither the first direction a nor the circumferential direction of the central axis 32 is parallel to the extension direction of the first chute 3213. Furthermore, neither the first direction a nor the circumferential direction of the central axis 32 is perpendicular to the extension direction of the first chute 3213.

[0060] The first direction a and the circumferential direction of the central axis 32 both intersect with the extension direction of the second chute 471. In other words, the first direction a and the circumferential direction of the central axis 32 both form an angle with the extension direction of the second chute 471, and neither the first direction a nor the circumferential direction of the central axis 32 is parallel to the extension direction of the second chute 471, and neither the first direction a nor the circumferential direction of the central axis 32 is perpendicular to the extension direction of the second chute 471.

[0061] In the connected position, the rolling ball is located at one end of the first slide groove 3213 close to the clamping component 2, and at one end of the second slide groove 471 away from the clamping component 2; in the separated position, the rolling ball is located at one end of the first slide groove 3213 away from the clamping component 2, and at one end of the second slide groove 471 close to the clamping component 2.

[0062] like Figure 13As shown, when the rolling ball moves from the connected position to the separated position, the rolling ball moves from the end of the first slide groove 3213 close to the clamping component 2 to the end of the first slide groove 3213 away from the clamping component 2, and the second slide groove 471 moves relative to the rolling ball, so that the end of the second slide groove 471 away from the clamping component 2 is away from the rolling ball, and the end of the second slide groove 471 close to the clamping component 2 is close to the rolling ball.

[0063] When the hammer block 4 moves from the connected position to the disconnected position, the rolling ball is displaced within both the first slot 3213 and the second slot 471. Since the first direction a and the circumferential direction of the central axis 32 intersect the extension direction of the first slot 3213, and the rolling ball moves from the end of the first slot 3213 closer to the clamping assembly 2 to the end of the first slot 3213 farther from the clamping assembly 2, the rolling ball is displaced within the first slot 3213 away from the clamping assembly 2 along the first direction a, thereby causing the hammer block 4 to be displaced away from the clamping assembly 2. Since the first direction a and the circumferential direction of the central axis 32 intersect the extension direction of the second slot 471, and since the end of the second slot 471 farther from the clamping assembly 2 is farther away from the rolling ball, while the end of the second slot 471 closer to the clamping assembly 2 is closer to the rolling ball, the hammer block 4 is further displaced away from the clamping assembly 2 along the first direction a.

[0064] The hammer block 4 can generate a displacement away from the clamping assembly 2 through the first slide groove 3213 and the second slide groove 471, thereby avoiding the first slide groove 3213 and the second slide groove 471 from being too large, and further avoiding the size of the central shaft 32 provided with the first slide groove 3213 from being too large, and avoiding the size of the hammer block 4 provided with the second slide groove 471 from being too large, thereby reasonably reducing the size of the central shaft 32 and the hammer block 4, so as to reduce the size of the miniature straight-handle rotary striking tool 100.

[0065] When the hammer block 4 moves from the separated position to the connected position, the rolling ball moves from the end of the first slot 3213 away from the clamping assembly 2 to the end of the first slot 3213 closer to the clamping assembly 2. Since the first direction a and the circumferential direction of the central axis 32 both intersect with the extension direction of the first slot 3213, and the rolling ball moves from the end of the first slot 3213 away from the clamping assembly 2 to the end of the first slot 3213 closer to the clamping assembly 2, the hammer block 4 is displaced along the circumferential direction of the central axis 32 in the same direction as the rotation of the central axis 32. This displacement between the hammer block 4 and the central axis 32 further accelerates the hammer block 4, thereby increasing the striking effect of the hammer block 4 on the clamping assembly 2. The second slot 471 moves relative to the rolling ball, causing the end of the second slot 471 closer to the clamping assembly 2 to move away from the rolling ball and the end of the second slot 471 farther from the clamping assembly 2 to move closer to the rolling ball. Since the first direction a and the circumferential direction of the center axis 32 both intersect with the extension direction of the second slide groove 471, and the end of the second slide groove 471 close to the clamping component 2 is away from the rolling ball, and the end of the second slide groove 471 away from the clamping component 2 is close to the rolling ball, the hammer block 4 produces a displacement in the circumferential direction of the center axis 32 that is the same as the rotation direction of the center axis 32. By making the displacement between the hammer block 4 and the center axis 32, the hammer block 4 can be further accelerated, thereby increasing the striking effect of the hammer block 4 on the clamping component 2.

[0066] The hammer block 4 can be displaced relative to the central axis 32 along the circumferential direction of the central axis 32, which is the same as the rotational direction of the central axis 32, through both the first slot 3213 and the second slot 471. This displacement can further accelerate the hammer block 4, thereby increasing the striking effect of the hammer block 4 on the clamping assembly 2 and, in turn, increasing the torque and torque output by the clamping assembly 2. Furthermore, the hammer block 4 can be displaced relative to the central axis 32 along the circumferential direction of the central axis 32, which is the same as the rotational direction of the central axis 32, through both the first slot 3213 and the second slot 471. This can prevent the first slot 3213 and the second slot 471 from being too large, thereby preventing the central axis 32 provided with the first slot 3213 from being too large, and preventing the hammer block 4 provided with the second slot 471 from being too large, thereby rationally reducing the size of the central axis 32 and the hammer block 4, thereby reducing the size of the miniature straight-shank rotary striking tool 100.

[0067] Combine Figure 4 、 Figure 5 and Figure 7As shown, in some embodiments, the guide structure 321 also includes a first slot 3212 and a third slot 3214. The first slot 3212 is located between the first slot 3213 and the third slot 3214 along the radial direction of the central axis 32 and is respectively connected to the first slot 3213 and the third slot 3214. The first slot 3213 and the third slot 3214 are symmetrically arranged with the central axis of the first slot 3212 as the axis of symmetry.

[0068] The first slot 3212 is shaped like an axisymmetric figure, and the central axis of the first slot 3212 is the symmetry axis of the first slot 3212. Figure 7 As shown in c in the middle.

[0069] When the hammer block 4 is in the connected position, the rolling ball is located in the first engaging groove 3212. When the hammer block 4 is in the disconnected position and rotates in a first rotational direction, the rolling ball is located in the first chute 3213. When the hammer block 4 is in the connected position and rotates in a second rotational direction, the rolling ball is located in the third chute 3214. The first rotational direction and the second rotational direction are opposite. By providing the first chute 3213 and the third chute 3214, the rolling ball can enter the first chute 3213 or the third chute 3214 depending on the direction of the hammer block 4, thereby being located in the connected position depending on the direction of the hammer block 4.

[0070] Combine Figure 4 、 Figure 5 、 Figure 11 and Figure 12 As shown, the limiting structure 47 also includes a second slot 473 and a fourth slot 472. The second slot 473 is located between the second slot 471 and the fourth slot 472 along the radial direction of the central axis 32 and is respectively connected to the second slot 471 and the fourth slot 472. The second slot 471 and the fourth slot 472 are symmetrically arranged with the central axis of the second slot 473 as the axis of symmetry.

[0071] The second slot 473 is shaped like an axisymmetric figure, and the central axis of the second slot 473 is the symmetry axis of the second slot 473. Figure 12 As shown in d in the middle.

[0072] When the hammer block 4 is in the connected position, the rolling ball is located in the second engaging groove 473. When the hammer block 4 is in the disconnected position and rotates in the first rotational direction, the rolling ball is located in the second chute 471. When the hammer block 4 is in the connected position and rotates in the second rotational direction, the rolling ball is located in the fourth chute 472. The first rotational direction and the second rotational direction are opposite. By providing the second chute 471 and the fourth chute 472, the rolling ball can enter the second chute 471 or the fourth chute 472 depending on the direction of the hammer block 4, thereby being able to be in the connected position according to the direction of the hammer block 4.

[0073] Combine Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, in some embodiments, the hammer block 4 includes a hammer body 48. Along a first direction a, the hammer body 48 is provided with an annular first protrusion 41 and a second protrusion 42 on its end surface facing the elastic member 5. The first protrusion 41 is disposed around the second protrusion 42 and defines an annular groove 43 therebetween. The drive assembly 3 also includes an abutment plate 45 and a plurality of balls 44 disposed within the annular groove 43. Along the first direction, the abutment plate 45 is positioned between the balls 44 and the elastic member 5 and abuts against both. The annular groove 43 can limit the position of the balls 44 and the abutment plate 45, allowing them to move within the annular groove 43. The balls 44 and the abutment plate 45 enable the end of the elastic member 5 that abuts the abutment plate 45 to rotate relative to the hammer block 4, thereby increasing the degree of synchronization of the rotation of the two ends of the elastic member 5 and preventing the elastic member 5 from twisting.

[0074] Combine Figure 2 、 Figure 9 and Figure 10 As shown, specifically, the reduction member 34 includes a planetary gear, which includes three gears 341 and an outer gear ring 342 that is sleeved on and meshes with the three gears 341. Each gear 341 is provided with a connecting shaft 343. The central shaft 32 is provided with an axial hole 322 that corresponds one-to-one with the connecting shafts 343 of the three gears 341. Each connecting shaft 343 is positioned within a corresponding axial hole 322. A portion of the transmission shaft 311 of the motor 31 is provided with a toothed structure. The toothed structure of the transmission shaft 311 is located between the three gears 341 and meshes with each gear 341.

[0075] The speed reduction member 34 can reduce the rotational speed transmitted from the transmission shaft 311 to the central shaft 32 , so that the rotational speed of the central shaft 32 meets the working requirements of the miniature straight-shank rotary striking tool 100 .

[0076] Combine Figure 3 、 Figure 5 ,and Figure 6 As shown, in some embodiments, the hammer block 4 includes a first abutment portion 46, and the clamping assembly 2 is provided with a second abutment portion 21. When the hammer block 4 is in the connected position, the first abutment portion 46 and the second abutment portion 21 abut in the circumferential direction of the hammer block 4. When the hammer block 4 is in the separated position, the first abutment portion 46 and the second abutment portion 21 are separated.

[0077] When the hammer block 4 is in the connected position, the first abutment portion 46 and the second abutment portion 21 abut against each other in the circumferential direction of the hammer block 4, thereby enabling the hammer block 4 to transmit power to the clamping assembly 2. When the hammer block 4 is in the separated position, the transmission connection between the first abutment portion 46 and the second abutment portion 21 is released.

[0078] like Figure 6 As shown, specifically, the first abutting portion 46 is connected to the first protruding portion 41 , so that the structural distribution of the hammer block 4 is reasonable.

[0079] Combine Figure 5 and Figure 9 As shown, specifically, the clamping assembly 2 includes an output shaft 22, a connecting sleeve 23, and a ball stop 25. The output shaft 22 includes a shaft body 221 and a second abutting portion 21 provided on the shaft body 221. The shaft body 221 is provided with a mounting groove 222 suitable for connecting with a front end tool. The ball stop 25 is provided on the shaft body 221. The connecting sleeve 23 is movably mounted on the shaft body 221 and mounted outside the ball stop 25. The connecting sleeve 23 includes a sleeve body 231, a protrusion 232 provided on the sleeve body 231, and a groove body 233 provided on the sleeve body 231. When the connecting sleeve 23 moves until the protrusion 232 abuts the ball stop 25, a portion of the ball stop 25 is located in the mounting groove 222 to clamp the front end tool. When the connecting sleeve 23 moves until the groove body 233 faces the ball stop 25, a portion of the ball stop 25 can enter the groove body 233, thereby causing the entire ball stop 25 to be located outside the mounting groove 222 to release the front end tool. Thus, it is convenient for the operator to install the front end tool in the installation groove 222 , and it is convenient for the operator to remove the front end tool from the installation groove 222 .

[0080] Combine Figure 5 and Figure 9 As shown, the sleeve 231 is further provided with a spring groove 27, and the clamping assembly 2 further includes a mounting block 26 and a spring 24. The spring 24 is abutted between the mounting block 26 and the end wall of the spring groove 27 and is located within the spring groove 27. The spring 24 is in a compressed state to force the protrusion 232 to abut against the stop ball 25. The spring 24 can keep the stop ball 25 in a position to fix the front end tool, thereby preventing the front end tool from falling out of the spring groove 27 during use.

[0081] like Figure 1 As shown, in some embodiments, the miniature straight-handle rotary striking tool 100 further includes a second housing 6 and a circuit assembly 7. The second housing 6 is located on a side of the first housing 1 close to the drive assembly 3 and is connected to the first housing 1. The second housing 6 defines a second accommodating cavity 61. The circuit assembly 7 is disposed in the second accommodating cavity 61 and is electrically connected to the drive assembly 3. Both the second housing 6 and the second accommodating cavity 61 extend along a second direction b, and the second direction b is parallel to the first direction a.

[0082] The second housing 6 extends along the second direction b, meaning that its length is parallel to the second direction b. In other words, the main body of the second housing 6 is a straight line, such as a cylinder, a truncated cone, or a rectangular parallelepiped. The second accommodating cavity 61 extends along the second direction a, meaning that its length is parallel to the second direction b. In other words, the main body of the second accommodating cavity 61 is a straight line, such as a cylinder, a truncated cone, or a rectangular parallelepiped. By aligning the extension directions of the second housing 6 and the second accommodating cavity 61, the space utilization of the second accommodating cavity 61 relative to the second housing 6 is increased.

[0083] By making the second direction b parallel to the first direction a, the extension directions of the first housing 1 and the second housing 6 are made the same or parallel, so as to further increase space utilization.

[0084] In other embodiments, the miniature straight-handle rotary striking tool 100 further includes a second shell 6 and a circuit assembly 7. The second shell 6 is located on a side of the first shell 1 close to the drive assembly 3 and is connected to the first shell 1. The second shell 6 defines a second accommodating cavity 61. The circuit assembly 7 is disposed in the second accommodating cavity 61 and is electrically connected to the drive assembly 3. The second shell 6 and the second accommodating cavity 61 both extend along a second direction b, and the second direction b is set at an angle to the first direction a.

[0085] The second housing 6 extends along the second direction b, meaning that its length is parallel to the second direction b. In other words, the main body of the second housing 6 is a straight line, such as a cylinder, a truncated cone, or a rectangular parallelepiped. The second accommodating cavity 61 extends along the second direction a, meaning that its length is parallel to the second direction b. In other words, the main body of the second accommodating cavity 61 is a straight line, such as a cylinder, a truncated cone, or a rectangular parallelepiped. By aligning the extension directions of the second housing 6 and the second accommodating cavity 61, the space utilization of the second accommodating cavity 61 relative to the second housing 6 is increased.

[0086] like Figure 2 As shown, in some embodiments, the circuit assembly 7 includes a battery 71 and a circuit board 72, and the battery 71 and the circuit board 72 are arranged relative to each other in a third direction, which is perpendicular to the second direction b.

[0087] By arranging the battery 71 and the circuit board 72 relative to each other in the third direction, an overlapping portion is created between the battery 71 and the circuit board 72 , so that the size of the second housing 6 can be reduced, thereby further reducing the overall size of the miniature straight-handle rotary striking tool 100 .

[0088] As some examples, the third direction is a radial direction of the second housing 6 .

[0089] Combine Figure 1 and Figure 2As shown, in some embodiments, the radial size of the first shell 1 increases along the first direction a from the clamping component 2 to the drive component 3, and the radial size of the second shell 6 increases along the second direction b from the drive component 3 to the circuit component 7, so that the first shell 1 and the second shell 6 have a variety of gripping circumferences, which is convenient for the operator to grip. In addition, it is also convenient for the operator to find a suitable gripping position.

[0090] Combine Figure 1 and Figure 2 As shown, in some embodiments, the radial size of the first shell 1 gradually increases along the first direction a from the clamping component 2 to the driving component 3, and the radial size of the second shell 6 gradually increases along the second direction b from the driving component 3 to the circuit component 7, so as to improve the operator's grip feel.

[0091] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A miniature straight handle rotary striking tool, characterized in that: include: a first housing extending along a first direction, wherein the first housing defines a first accommodating cavity extending along the first direction; a clamping assembly rotatably disposed in the first accommodating cavity and adapted to be connected to a front-end tool; A driving assembly is disposed in the first accommodating cavity; a hammer block, drivingly connected to the drive assembly, the hammer block being movably disposed in the first accommodating cavity between a connected position and a disconnected position along a first direction, the hammer block being connected to the clamping assembly in the connected position to drive the clamping assembly to rotate, and the hammer block being disconnected from the clamping assembly in the disconnected position, the hammer block being configured to move from the connected position to the disconnected position when the rotation of the clamping assembly is blocked; an elastic member located in the first accommodating cavity and connected to the hammer block, wherein the elastic member is configured to drive the hammer block to move from the separated position to the connected position; Wherein, the clamping assembly, the hammer block and the driving assembly are arranged in sequence in the first direction.

2. The miniature straight handle rotary striking tool according to claim 1, characterized in that: The maximum diameter of the hammer block is less than 36 mm and greater than 22 mm, and the driving assembly includes a motor, and the maximum diameter of the motor is less than 36 mm and greater than 22 mm.

3. The miniature straight handle rotary striking tool according to claim 2, characterized in that: The driving assembly further comprises a central shaft connected to the motor in a transmission manner, and the hammer block is sleeved outside the central shaft and can rotate relative to the central shaft; The outer circumference of the central shaft is provided with a guide structure, the inner circumference of the hammer block is provided with a limit structure, and the connecting member is slidably provided on the guide structure and connected to the limit structure. The axial direction of the central axis is parallel to the first direction, and the first direction and the circumferential direction of the central axis both intersect with the extension direction of the guide structure; When the clamping assembly is in the connected position and rotation is blocked, the connecting member can slide on the guide structure and drive the hammer block to move toward the disconnected position.

4. The miniature straight handle rotary striking tool according to claim 3, characterized in that: The guide structure includes a first slide groove, the limiting structure includes a second slide groove, the first direction and the circumferential direction of the central axis both intersect with the extension direction of the first slide groove, the first direction and the circumferential direction of the central axis both intersect with the extension direction of the second slide groove, and the connecting member is configured as a rolling ball rollably disposed in the first slide groove and the second slide groove; In the connected position, the rolling ball is located at one end of the first slide groove close to the clamping assembly, and at one end of the second slide groove away from the clamping assembly; in the separated position, the rolling ball is located at one end of the first slide groove away from the clamping assembly, and at one end of the second slide groove close to the clamping assembly.

5. The miniature straight handle rotary striking tool according to claim 4, characterized in that: The guide structure also includes a first slot and a third slide groove. The first slot is located between the first slide groove and the third slide groove along the radial direction of the central axis and is respectively connected to the first slide groove and the third slide groove. The first slide groove and the third slide groove are symmetrically arranged with the central axis of the first slot as the symmetry axis.

6. The miniature straight handle rotary striking tool according to claim 5, characterized in that: The limiting structure also includes a second slot and a fourth slide groove. The second slot is located between the second slide groove and the fourth slide groove along the radial direction of the central axis and is respectively connected to the second slide groove and the fourth slide groove. The second slide groove and the fourth slide groove are symmetrically arranged with the central axis of the second slot as the symmetry axis.

7. The miniature straight handle rotary striking tool according to claim 3, characterized in that: The hammer block includes a hammer body, and along the first direction, the hammer body is provided with a first annular protrusion and a second annular protrusion on the end surface facing the elastic member, wherein the first protrusion is arranged around the outside of the second protrusion and defines an annular groove between the first protrusion and the second protrusion; The miniature straight-handle rotary striking tool further includes an abutment plate and a plurality of balls arranged in the annular groove. Along the first direction, the abutment plate is located between the balls and the elastic member and abuts against both of them respectively.

8. The miniature straight handle rotary striking tool according to any one of claims 1 to 6, characterized in that: The hammer block includes a first abutment portion, and the clamping assembly includes a second abutment portion. When the hammer block is located at the connected position, the first abutment portion and the second abutment portion abut in the circumferential direction of the hammer block. When the hammer block is located at the separated position, the first abutment portion and the second abutment portion are separated.

9. The miniature straight handle rotary striking tool according to any one of claims 1 to 6, characterized in that: The miniature straight-handle rotary striking tool also includes a second shell and a circuit assembly. The second shell is located on the side of the first shell close to the drive assembly and is connected to the first shell. The second shell defines a second accommodating cavity. The circuit assembly is arranged in the second accommodating cavity and is electrically connected to the drive assembly. The second shell and the second accommodating cavity extend along a second direction, and the second direction is parallel to or at an angle to the first direction.

10. The miniature straight handle rotary striking tool according to claim 9, characterized in that: The circuit assembly includes a battery and a circuit board, the battery and the circuit board are arranged relative to each other in a third direction, the third direction being perpendicular to the second direction; and / or, As the clamping assembly approaches the driving assembly along the first direction, the radial size of the first housing increases. As the driving assembly approaches the circuit assembly along the second direction, the radial size of the second housing increases.

Images