Hand tool and related rotary movement mechanism and movement method

Abstract

The invention discloses a manual tool, a related rotary movement mechanism, a movement method and a dual-mode ratchet wrench based on a detachable reversing switch, and belongs to the technical field of manual tools. The tool includes: a first assembly (26) having a ratchet mechanism (92) and a first gear (90); the second assembly (28) is provided with a driving head (60) meshed with the first gear; and the detachable reversing switch (70) is inserted or removed to realize the switching of two working modes: a traditional ratchet mode (reversing switch joint): locking the first handle (31) and the second handle (41), and driving a to-be-tightened piece in one direction; according to the two-hand cooperative speed increasing mode (reversing switch removal), a first gear (90) and a driving head tooth part (61) are meshed and rotate relatively, the axial distance transmission ratio i = R1 / R2 (R1gt, R2) is formed, the swing angle alpha of a first handle and the output angle theta of a driving head meet the requirement that theta = alpha * (R1 / R2), and torque amplification and speed increasing synchronization is achieved.

Description

[0001] This application is a divisional application. The application number of the original application is: CN202411034166.5, the application date is July 30, 2024, and the invention title is "Manual Tools and Related Rotary Motion Mechanisms, Motion Methods". Technical Field

[0002] The present invention relates to the technical field of manual tools, and particularly to a dual-mode ratchet wrench based on a detachable reversing switch, which can switch between a traditional ratchet wrench mode and a two-handed collaborative speed-increasing mode. In particular, the present invention solves the contradiction that traditional ratchet tools cannot balance high torque output and high-speed operation through the design of the shaft spacing transmission ratio (i = R1 / R2) and the separable reversing switch structure, and optimizes the accuracy of the initial thread alignment. Background Art

[0003] The prior art has the following quantitative defects: 1. Single-mode limitation (CN205630433U): Only provides a speed-increasing function (transmission ratio 1:1.5), but the maximum output torque is reduced by 40% (measured ≤ 50 N·m); Additional auxiliary tools are required for the initial thread alignment, with an average time consumption of ≥ 30 seconds.

[0004] 2. Low operation efficiency (CN219132135U): Although traditional lever wrenches can increase torque (measured ≥ 100 N·m), a swing angle of ≥ 60° is required to drive the socket to rotate 15°, resulting in an efficiency loss of 35%; When operating with both hands, the initial alignment failure rate is as high as 25% (due to the lack of a stable fulcrum).

[0005] 3. Functional singularity: Existing manual tools cannot achieve initial thread alignment (users initially tighten nuts / bolts by holding them in their hands) and high torque / high-speed output, while the present invention realizes initial thread alignment and high torque / high-speed output through a detachable reversing switch for mode switching within 3 seconds.

[0006] Technical Bottlenecks: The speed-increasing mode and the high-torque mode cannot coexist; When operating a manual tool with one hand, it is impossible to simultaneously achieve axial alignment and torque transmission (contradiction rate 82%, based on industry research data). For example, in the axial alignment of the initial screw connection of bolts / nuts, the vertical pressing operation of self-tapping screws, and the operation of the front working part of a tool with a lateral lever arm handle cannot be perpendicular to the fastener to be tightened. Summary of the Invention

[0007] Core Innovation Points: 1. Dual-mode switching mechanism: Detachable reversing switch: Engaged state: When inserted into the receiving hole, the two handles are locked to form a traditional ratchet mode (mode switching time ≤ 3 seconds); Disengaged state: Unlocked after removal, enabling a two-handed collaborative speed increase mode (transmission ratio i = 1.2 - 2.5).

[0008] 2. Shaft pitch drive design: The pitch circle radius ratio of the first gear to the tooth part of the drive head is i = R1 / R2 (R1 > R2), and through the mathematical relationship: θ = α·(R1 / R2) Where α is the swing angle of the first handle (≤ 100° torque transmission stage), and θ is the output angle of the drive head (≤ 250°).

[0009] 3. Thread alignment optimization: The second handle serves as a stable fulcrum, and the first handle makes small-angle reciprocating rotations (α ≤ 15° initial tightening stage), so that the initial alignment error ≤ ±1.5° (traditional tools ≥ ±5°).

[0010] The embodiment discloses a technical solution according to claims 1 - 10, a lever / speed increase manual tool based on the gear meshing motion of the shaft pitch, which can be used as a ratchet wrench tool, for example, driving a joint to fit a socket or a bit to screw a fastener; it can also be used as a lifting mechanism or a belt tightening mechanism, for example, driving a joint to connect an external runner to pull a rope. The manual tool includes a first part and a second part; The first part includes a first handle and a receiving chamber (receiving cavity) structure integrally formed on the opposite side. The receiving chamber (receiving cavity) includes a first region and a second region. Among them, the first region includes a central shaft hole, a semi-periphery facing the handle direction, and a counterbore provided on the semi-periphery and on the longitudinal axis of the handle. And a plurality of screw holes are provided on the semi-periphery. Among them, the second region includes a central shaft hole, a substantially semi-circular notch in the direction opposite to the handle, and two arc edge portions connecting the two sides of the semi-periphery; that is, the first and second regions form an 8-shaped structure with two circular connections having an outer circle and an inner circle; A first gear, which is provided in the second region. The first gear includes opposite shafts and is matched with the central shaft hole; A ratchet, which is provided in the first region. The ratchet includes opposite ratchet teeth and a central shaft. And a receiving hole is provided on one side of the central shaft. There are also two concave portions provided in the middle on one side of the ratchet. Among them, the central shaft is matched with the central shaft hole; Here, it is also conceivable that the ratchet mechanism uses other conventional techniques to mesh with the first gear, and there is no need to repeat the introduction; A first cover plate, which is matched with the accommodation chamber structure, the first cover plate includes central shaft holes in two regions and through holes corresponding to the multiple screw holes on the semi-circumference, the shaft holes on the first cover member are matched with the shaft of the first gear and the middle shaft of the ratchet, and the first cover plate is fixedly connected with the accommodation chamber by screws; The second part includes a second handle and an accommodating chamber (accommodating cavity) structure formed in one piece, the accommodating chamber (accommodating cavity) includes a first area and a second area, wherein the first area faces the handle direction and is provided with a central axis hole; the second area is on the opposite side of the first area and is provided with a central axis hole, the second area is provided with a semi-circular edge on the opposite side of the handle direction, and the semi-circular edge is provided with a plurality of screw holes; that is, the first and second areas form a structure in which an outer ellipse and two inner circles are connected; A driving head, which is arranged in the second area of ​​the second part, the driving head includes a second tooth portion and a driving joint, the second tooth portion is arranged around the outer periphery of the driving head and the center of the tooth portion forms an axis on two opposite sides, the driving joint is adjacent to the axis, wherein the axis cooperates with the central axis hole, and the driving joint can drive the driven member; A second cover plate, which is matched with the accommodation chamber structure, the second cover plate comprises central axial holes in two regions and through holes opposite to the multiple screw holes on the semi-circumference, wherein a through hole is provided in the direction of the handle relative to the central axial hole in the first region, and the second cover plate is fixedly connected to the accommodation chamber by screws; wherein the first area of ​​the second part covers the accommodation chamber of the first part, the shaft of the first gear is formed to rotate in cooperation with the central shaft hole of the first area of ​​the second part, and the first gear is meshed with the second tooth portion of the driving head; wherein the first handle is formed above the second handle, and the length of the first handle is greater than the length of the second handle to form a ratio; Wherein, a spring and a steel ball are disposed in the counterbore of the first region of the first portion, wherein the steel ball cooperates with the recess of the ratchet; A reversing switch, which passes through the through hole of the second cover plate and the axial hole of the first area of ​​the first cover plate and is arranged in the receiving hole of the ratchet, one end of the reversing switch is exposed from the second cover plate to form a toggle portion, and the other end of the reversing switch forms a joint to cooperate with the receiving hole of the ratchet for transmission; the reversing switch can be switched between a first position and a second position, wherein the reversing switch can selectively move away from or engage with the manual tool; In method one, the reversing switch selects to engage the manual tool, the first handle and the second handle cannot rotate relative to each other to form a whole, the reversing switch is in the first position, the reversing switch pushes the ratchet to engage with the left side teeth of the first gear, when the manual tool rotates in the first direction, the manual tool can drive the driven member to rotate in the first direction; when the manual tool rotates in the second direction, the ratchet forms a ratcheting motion, and the manual tool forms an idle rotation; The reversing switch is in the second position. The reversing switch pushes the ratchet to engage with the right-side teeth of the first gear. When the hand tool rotates in the second direction, the hand tool can drive the piece to be driven to rotate in the second direction; when the hand tool rotates in the first direction, the ratchet forms a ratcheting motion and the hand tool forms an idling rotation. Among them, in Method 2, after the reversing switch selects the first position or the second position and moves away from the hand tool, the first handle can rotate relative to the second handle. Wherein, the axial distance is achieved by the radius of the large diameter of the first gear plus the radius of the small diameter of the second tooth part to obtain the transmission ratio. Driving the first handle to rotate around the central axis of the first area of the second part will drive the driving head to achieve leveraged transmission around its own axis in the second area of the second part, and will drive the piece to be driven; wherein, the first handle rotates and the pawl forms a ratchet, and the first gear and the second tooth part stop rotating; wherein, the second handle can abut against an external fixed object and / or be held by the user's other hand.

[0011] According to the above technical features, the embodiment also has special advantages. The method for initially aligning the thread of a ratchet wrench includes, in the state where the reversing switch is removed: Balance maintaining stage: The user holds the second handle with one hand to maintain balance, and through the fine adjustment of the second handle, the joint of the driving head is kept in coaxial contact with the bolt / nut. At this time, the first gear and the tooth part of the driving head are in a non-loaded meshing state. Initial screwing stage: When it is detected that the threads are aligned, the other hand operates the first handle to make small-angle reciprocating rotations, and uses the clearance fit between the first gear and the tooth part of the driving head to achieve self-alignment of the threads. Torque transmission stage: When the initial screwing of the thread meshing is completed, the second handle becomes the fulcrum, and an amplified torque is generated through the lever movement of the first handle to apply a force F to the first handle, and an effective torque is generated through the transmission ratio i = R1 / R2.

[0012] The embodiment also discloses a technical solution of a hand tool, which can be used as a ratchet wrench tool, for example, the driving joint is fitted with a socket or a bit to screw a fastener; it can also be used as a lifting mechanism or a hand tool with a belt tightening mechanism, for example, the driving joint is connected to an external runner to pull a rope.

[0013] A two-handed collaborative lever speed-increasing hand tool includes: A first component, including a first handle and a transmission mechanism; A second component, including a second handle and a driving head, and the driving head is provided with a second tooth part; A detachable mode switching component; Wherein: The transmission mechanism includes a first gear, and the first gear selectively meshes and moves with the second tooth part of the driving head; The mode switching component has: Engaged state: lock the first handle and the second handle to form a traditional manual tool mode; Disengagement state: unlock the first handle and the second handle, so that the first gear meshes with the second tooth to form a lever speed-increasing transmission, the transmission ratio i=R1 / R2, where R1 is the pitch circle radius of the first gear, R2 is the pitch circle radius of the second tooth, and R1>R2; In Leverage Accelerator Mode, users can perform the following operations: The first operation mode: holding the second handle with one hand to stabilize the tool, and driving the first handle with the other hand to screw the driven part; The second operation mode: holding the second handle with one hand against an external fixed object as support, and driving the first handle with the other hand to rotate the driven member.

[0014] A preferred lever-speed increasing hand tool is a dual-mode ratchet wrench, and the transmission mechanism comprises: A first accommodating chamber, wherein a ratchet mechanism is disposed in a first cavity thereof, and the first gear is disposed in a second cavity thereof; A second accommodating chamber, wherein the first cavity covers the first accommodating chamber, and the driving head is arranged in the second cavity; The mode switching component is a reversing switch, which is arranged in the receiving hole of the ratchet mechanism.

[0015] Preferably, the lever speed increasing hand tool, the shaft of the first gear and the central shaft hole of the first cavity of the second component form a first rotation axis (K), the shaft of the drive head and the central shaft hole of the second cavity form a second rotation axis (X), and the distance between the two axes D=R1+R2.

[0016] Preferably, the transmission ratio i of the lever-type speed-increasing hand tool is in the range of 1.2≤i≤2.5, and the ratio of the first handle length L1 to the second handle length L2 is in the range of 1.5≤L1 / L2≤2.5.

[0017] Quantifying the effect of technology: Index Traditional tool The present invention Improvement rate Mode switching time ≥15 seconds ≤3 seconds 80% Initial alignment success rate 75% 98% 23% High-speed mode efficiency 15° output / 60° swing 30° output / 30° swing 100% Torque transmission loss 35% 12% 66% BRIEF DESCRIPTION OF THE DRAWINGS Having generally described some exemplary embodiments based on key features, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale. And among them: Figures 1 to 8 A hand tool of a lever / speed-increasing ratchet wrench having teeth meshing between gears and gears, gears and ratchets according to an exemplary embodiment is shown. in, Figure 1 Front view, Figure 2 Bottom view, Figure 3 Top view,Figure 4 Stereogram, Figure 5 Exploded view, Figure 6 is a perspective view of the reversing switch being removed from the hand tool. Figure 7 according to Figure 2 The BB section is a partial enlarged diagram of the internal component connection structure. Figure 8 according to Figure 1 A partial enlarged diagram of the internal component connection structure of the AA section; DETAILED DESCRIPTION Example dual mode switching: 1. Traditional model: Inserting the reversing switch (70) into the receiving hole (93), with the toggle portion (70a) placed in the first position (75); At this time, the ratchet wheel (92) meshes with the left teeth of the first gear (90), and rotates clockwise to drive the driven member (attached Figure 8 ); When rotating counterclockwise, the ratchet pawl (95) ratchets to achieve idle rotation.

[0018] 2. Speed-up mode: The reversing switch is removed, and the first handle (31) is rotated around the axis K by an angle α=30°; The output angle of the drive head (60) around the axis X is θ=α·(R1 / R2)=30°×1.8=54° (the measured torque is amplified by 1.5 times).

[0019] Example thread alignment method: 1. Balancing stage: Hold the second handle (41) with one hand and make fine adjustments to make the drive head (60) coaxial with the bolt (deviation ≤ 1.5°); 2. Initial tightening stage: the other hand swings the first handle (31) with a small amplitude (α≤15°) to achieve self-alignment by using the tooth gap (0.05-0.1 mm); 3. Torque stage: The second handle is against the fixed object, and the first handle is swung with full force (α=90°), with an output torque ≥80N·m.

[0020] Embodiment of the hand tool, Figures 1 - 8 Shown The manual tool 30 can be applied in different scenarios. For example, it can be used in a lifting mechanism and a belt tightening mechanism, which will be described in detail later. It can also be used as a ratchet wrench. Different from traditional ratchet wrenches, it has a speed increasing and lever effect, with a relative rotational movement of gear meshing with an axial pitch. When the movement method is that the reversing switch is moved away, the ratchet wrench has a first handle and a second handle, such that the gear with a ratchet effect on the first handle drives the gear on the second handle for a transmission movement (the relative rotational movement of two gears, which is brought about by the action around two axes). When the first handle makes a rotary motion, the ratchet action causes the gears to stop rotating relative to each other, and the first handle rotates freely. When the movement method is that the reversing switch is engaged, it is also feasible to selectively operate in the same way as a traditional ratchet wrench. At this time, the gears are fixed by the ratchet action and do not rotate to drive the workpiece to be driven. This is the action brought about by the rotation around one axis. When the handle makes a rotary motion and the ratchet action occurs, the two gears are fixed and the manual tool rotates freely. Both of these movement methods are related to the selective engagement or separation of the reversing switch with the manual tool.

[0021] Figures 1 - 8 Figure 4 shows a first embodiment of the manual tool of the lever / speed increasing ratchet wrench 30. As a selective function, the manual tool 30 is a manual tool for low-speed operation or labor-saving high-speed operation, and it has different characteristics.

[0022] The manual tool of this embodiment includes a first part 26 and a second part 28. The first part and the second part are assembled from the inside outwards, that is, the first part 26 is assembled first. The first part forms the characteristics of a ratchet wrench, including a first handle 31 and a relative accommodating chamber structure 32. Among them, the accommodating chamber 32 forms a first region 39a and a second region 39b ( Figure 8 as shown), and the region structure is two circular shapes; the two circular shapes are connected to form an 8-shaped structure with an outer circle and an inner circle, and the accommodating chamber forms a closed end and an open end. Among them, the first region 39a is in the middle between the first handle 31 and the second region 39b. A semi-periphery 32a is formed at the adjacent part of the first region and the first handle. The semi-periphery forms a counterbore 36 in the direction of the longitudinal axis of the handle ( Figure 5 Figure 7 as shown), and a plurality of screw holes 84 are provided on the semi-periphery. Among them, a spring 98 and a steel ball 99 are arranged in the counterbore 36; the second region 39b forms an open semi-circular notch and two arc edge parts 32b connecting the semi-periphery in the direction relative to the handle. Among them, shaft holes 37 and 38 are provided at the centers of the closed ends of the first and second regions.

[0023] It further includes a first gear 90 disposed in the open end of the second region, wherein the first gear 90 has shafts 91 formed on opposite sides thereof and pivotally mounted in the shaft holes 35 and 38; a ratchet 92 disposed in the open end of the first region 39a, wherein the ratchet 92 includes a pair of ratchet teeth 95 and a shaft 94 formed in the middle, and a receiving hole 93 is provided at one end of the shaft ( Figure 5 Figure 7 as shown), and its shaft 94 is pivotally mounted in cooperation with the central shaft holes 34 and 37; a first cover member 33 having the same shape as the accommodating chamber structure 32 of the first part, having shaft holes 34 and 35 provided in the same way as the first and second regions, and through holes 83 provided with respect to a plurality of screw holes on the semi-peripheral edge; the assembly process is that springs and steel balls are assembled in the counterbores, then the ratchet and the first gear are assembled in the first and second regions, and the first cover member connects them into a whole by a plurality of screws.

[0024] The second part 28 includes an accommodating chamber structure 42 and an opposite second handle 41. The accommodating chamber 42 includes a first region 47 and a second region 48, and the accommodating chamber forms a closed end and an open end. Its first region is formed and connected to this side of the second handle and is an overall open region. Among them, a central shaft hole 46 is provided in the middle of the first region 47. The second region 48 is away from the second handle and is connected to the first region 47 to form an overall oval periphery. A U-shaped semi-peripheral edge 49 is formed on the periphery of the front end of the second region connecting the first region. The inside of the U shape forms a circular and an open region of the rear end U shape, and shaft holes 45 and 46 are provided at the centers of the two closed regions. Among them, a plurality of screw holes 87 are provided on the semi-peripheral edge 49.

[0025] A driving head 60 is formed to include a second tooth portion 61, a rotating shaft 62, and a driving joint 63. The second tooth portion 61 is formed with gears around the outer periphery and is connected to the rotating shaft 62 on opposite sides. The driving joint 63 is provided on one side of the rotating shaft. The driving joint can be formed to engage and drive with external components, such as conventional sleeves, bits, runners, turntables, etc. The cross-section of the driving joint is set to be square, or it can also be other non-circular shapes. Among them, the driving head 60 is fitted in the open region of the second region 48 of the second part 28, and the rotating shaft 62 is rotatably connected to the shaft hole 45.

[0026] A second cover member 43 is formed as an elliptical member 43, and is formed with shaft holes 44a, 44b and a through hole 44 opposite to the first and second regions of the second part; wherein the accommodation chamber 32 of the first part 26 is assembled in the first region 47 of the second part 28 and connected by the second cover member 43, and is covered in the longitudinal direction, and the second part is connected by screws 85 so that the first and second parts are integrated, wherein the shaft 91 of the first gear 90 is engaged in the shaft holes 44a, 46 of the first region 47 of the second part and can be pivoted, so that the first gear 90 is meshed with the second toothed portion 61; Among them, a reversing switch 70 is inserted into the through hole 44 of the second cover member 43, the axial hole 34 of the first cover member 33 and the receiving hole 93 of the ratchet 92 for connection. The reversing switch is exposed from the second cover member to form a toggle portion 70a, and the middle portion connected to the toggle portion is formed as a rotating shaft 72 and rotates in coordination with the through hole 44. The end of the reversing switch forms a joint 71 connected to the receiving hole 93 of the ratchet 92, and the joint forms a non-circular transmission that cooperates with the receiving hole to form a non-circular transmission. The shape of the joint, such as conventional pentagonal, hexagonal, octagonal, twelve-equal-angle or plum blossom, can form a transmission cooperation and can be taken out. A magnet (not shown) is arranged at the bottom of one of the receiving holes to absorb the reversing switch. On the other hand, the second handle 41 is formed at the bottom of the first handle 31 In which, the length of the first handle is greater than that of the second handle, and the conventional ratio thought of by technicians in this field is that the ratio of the length of the first handle 31 to the length of the second handle 41 is 1:0.3 to 1:0.8; wherein, the accommodation chamber of the first part is covered by the second part, and an elliptical member 81 is arranged between the second cover member 43 of the second part 28 and the accommodation chamber 42, and in the open area of ​​the first area of ​​the second part, the elliptical member 81 is in contact with the first cover member 33 of the first part 26, and the elliptical member is provided with corresponding through holes for screws, shafts and reversing switches to pass through; a gasket 66 is provided on the rotating shaft 62 of the drive head 60, and the material of the elliptical member 81 and the gasket 66 is engineering plastic or metal, which plays a role in mating contact friction rotation lubrication.

[0027] Those skilled in the art may imagine that, based on the rotation of the first handle 31 relative to the second handle 41, the ratchet mechanism may form other modes of meshing transmission with the first gear, such as a traditional ratchet wrench, and the operation modes of the ratchet mechanism and the reversing switch include lever type, button type, etc.

[0028] Manual tool 30 transmission motion, method 1 (refer to Figure 6 ), after the reversing switch 70 is turned to the first position 75 or the second position 76, the ratchet wheel 92 rotates, and one side recess 96 is supported by the steel ball 99 ( Figure 8), then pull out the reversing switch 70 to separate it from the manual tool 30. The first handle 31 can rotate relative to the second handle 41. In one of the movement directions, the ratchet 92 engages with the first gear 90, that is, the first gear 90 drives the second tooth part 61 to rotate to form a relative rotational movement of the gears. Its drive head 60 drives the driven part to rotate. Its first handle 31 rotates around the K axis, and the drive head 60 rotates around the X axis; when the first handle 31 makes a rotary motion, the ratchet 92 ratchets, and the two gears 90, 61 stop rotating. The first handle only makes a rotary motion around the K axis; when the first handle 31 makes a rotary motion, the cooperation between the pawl 95 and the recess 96 forms a ratchet freewheel mechanism. The maximum rotation angle β of the ratchet 92 is limited within the range of 15° - 30°, and the tooth clearance fit tolerance between the first gear 90 and the second tooth part 61 is controlled within 0.05 - 0.1 mm. It can be understood here that forming torque can bring a lever effect, and at the same time, the diameter of the first gear being larger than that of the second tooth part brings a speed increasing effect. The axial distance between the second area of the first part and the first area of the second part is determined by the sum of the large diameter radius R1 of the first gear 90 and the small diameter radius R2 of the second tooth part 61 of the drive head. The transmission ratio i satisfies i = R1 / R2, where R1 > R2. Those skilled in the art think of a conventional transmission ratio ≥ 1.5:1. When the first handle 31 rotates around the central axis K of the first area of the second part, the rotation angle θ of the drive head 60 around its own axis X satisfies θ = α·(R1 / R2), where α is the swing angle of the first handle ≤ 100°, realizing a lever transmission with an angle magnification ratio of R1 / R2. In an important aspect, such as in a small invisible space, the driven part can be firmly held by the second handle. Especially during the initial thread connection of the driven element, the user holds the second handle with one hand to maintain balance and drives the first handle with the other hand to operate. Such as the method for initial thread alignment of a ratchet wrench, in the state where the reversing switch 70 is removed, it includes: Balance maintenance stage: The user holds the second handle 41 with one hand to maintain balance, and through the fine adjustment of the second handle, the joint 63 of the drive head 60 is coaxially contacted with the bolt / nut. At this time, the first gear 90 and the tooth part 61 of the drive head are in a non-loaded meshing state; Initial screwing stage: When thread alignment is detected, the other hand operates the first handle 31 to make small-angle reciprocating rotations, and uses the clearance fit between the first gear and the tooth part of the drive head to achieve self-alignment of the threads; Torque transmission stage: When the initial screwing of the thread engagement is completed, the second handle 41 becomes the fulcrum, and an amplified torque is generated through the lever movement of the first handle 31 to apply a force F to the first handle, and an effective torque is generated through the transmission ratio i = R1 / R2. By the above operation method, thread stripping can be effectively avoided.

[0029] On the other hand, the second handle can be pressed against an external fixed object, and when there is torque, the long arm of the first handle moves relative to the short arm of the second handle. The second handle 41 forms a reaction force fulcrum through the contact between its bottom and the external fixed object, and the handle length ratio L1 / L2 satisfies 2.5≤L1 / L2≤1.5, where L1 is the length of the first handle and L2 is the length of the second handle. Alternatively, the second handle is held by the user or pressed against an external fixed object at the same time.

[0030] In the operation of rotating the first handle relative to the second handle, the fastener is driven to rotate, for example, a self-tapping screw is driven, the connector is fitted with a sleeve, and the sleeve is then connected to the bit, or the bit is directly connected. Driving the self-tapping screw requires the bit to axially support the head of the self-tapping screw to operate (the same as the operation of a screwdriver). Here, the user holds the surface of the second cover of the second handle with one hand to axially stabilize it, directly acts on the bit to support the self-tapping screw, and drives the first handle to reciprocate with the other hand. This conventional operation method does not require changing hands and increasing torque.

[0031] Method 2 (refer to Figure 7 Figure 8 ), the reversing switch 70 is engaged with the hand tool 30, the first handle 31 and the second handle 41 cannot rotate relative to each other and form a whole to be used as a traditional ratchet wrench. The operation method is the same as that of a traditional ratchet wrench. The reversing switch is turned to the first position 75, and the reversing switch pushes the ratchet 92 to engage with the left tooth of the first gear 90 ( Figure 8 ), when the manual tool 30 rotates in the first direction, the manual tool can drive the driven member to rotate in the first direction ( Figure 8 ), the first gear and the second gear are fixed without rotating; when the manual tool rotates in the second direction (not shown), the ratchet forms a ratcheting motion, the two gears are fixed, and the manual tool forms an idle rotation.

[0032] As a hand tool for lifting mechanism and belt tensioning mechanism (not shown), the driving joint of the hand tool can be connected to an external rotating wheel or turntable to rotate the rope, which is broken down in detail by the operation process: Here, the installation and removal of the reversing switch are carried out in coordination; Step 1: The reversing switch is turned in the first direction, and the pawl of the ratchet wheel is engaged with the first direction of the first gear; Step 2: Completely remove the reversing switch to release the lever / speed-increasing function formed by the first handle and the second handle; Step 3: The user drives the driving head to rotate, and the turntable starts to rotate around the rope; Step 4: When the rope reaches the specified scale, the reversing switch is installed on the manual tool, the first handle and the second handle are locked, the reversing switch is toggled in the second direction, the pawl of the ratchet wheel is engaged in the second direction of the first gear, and the rotating wheel stops rotating at this time; Step Five: The manual tool is fixed to an external fixture, or the second handle can be fixed to an external fixture at the front end of the operation process.

[0033] On the other hand, in the manual tool rotation mechanism where the manual tool is used as a lever to increase speed, it can drive the lifting mechanism and the ratchet wheel of the belt tightening mechanism to rotate. The driving head of the manual tool is connected to the ratchet wheel for driving.

[0034] It should be understood that the arrangements described herein and / or shown in the drawings are for illustrative purposes only and not for limitation. Similarly, those skilled in the art will understand that other arrangements and elements (such as existing ratchet mechanisms) can be used alternatively, and some elements can be omitted together. At the same time, mechanical principles, common motion methods, common specifications and shape structures, and conventional experimental data are not provided, which is understandable. Among them, an important point is that the scenario applications and embodiments of various aspects are independent of the conventional changes of the design concept or technical solution. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dual-mode ratchet wrench, characterized in that, Comprising: A first component (26), including a first handle (31) and a first accommodating chamber (32) with a double cavity. A ratchet mechanism (92) is provided in the first cavity (39a) of the first accommodating chamber, and a first gear (90) is provided in the second cavity (39b). The first gear (90) is rotatably mounted in the central shaft hole (38) of the second cavity through a shaft (91); A second component (28), including a second handle (41) and a second accommodating chamber (42) with a double cavity. The first cavity (47) of the second accommodating chamber covers the first accommodating chamber (32) of the first component (26), and a driving head (60) with a second tooth portion (61) is provided in the second cavity (48). The driving head (60) is rotatably mounted in the central shaft hole (45) of the second cavity through a shaft (62); A detachable reversing switch (70), arranged in the accommodation hole (93) of the ratchet mechanism; Wherein: The shaft (91) of the first gear (90) extends into the central shaft hole (46) of the first cavity (47) of the second component (28), forming a rotational fit between the first component (26) and the second component (28); The reversing switch has: Engaging state: The reversing switch (70) is connected to the accommodation hole (93) for switching the meshing direction between the ratchet mechanism (92) and the first gear (90), locking the first handle (31) and the second handle (41) into an integrated traditional ratchet wrench mode; Separation state: The reversing switch is completely removed to unlock the first handle (31) and the second handle (41). At this time, the first gear (90) meshes with the second tooth portion (61) of the driving head to form a lever speed-increasing transmission, and the transmission ratio i = R1 / R2, where R1 is the pitch circle radius of the first gear and R2 is the pitch circle radius of the second tooth portion, and R1 > R2.

2. The dual-mode ratchet wrench according to claim 1, wherein: The first cavity (39a) of the first accommodating chamber (32) is provided with a central shaft hole (37), a semi-periphery (32a), and a counterbore (36). A plurality of screw holes (84) are provided on the semi-periphery (32a), and the second cavity (39b) is provided with a central shaft hole (38) and a semi-circular notch, and arc edge portions (32b) are provided on both sides; The first cavity (39a) and the second cavity (39b) form an 8-shaped composite structure with an internal circular and an external circular connection.

3. The dual-mode ratchet wrench according to claim 1, wherein: The first cavity (47) of the second accommodating chamber (42) is provided with a central shaft hole (46), and the second cavity (48) is provided with a central shaft hole (45) and a semi-periphery (49). A plurality of screw holes (87) are provided on the semi-periphery; The first cavity (47) and the second cavity (48) form a composite structure with an external elliptical and an internal circular connection.

4. The dual-mode ratchet wrench according to claim 1, wherein: The cooperative rotation between the first component (26) and the second component (28) includes: First rotation axis (K): a rotation axis formed by the shaft (91) of the first gear (90) and the central shaft hole (46) of the first cavity (47) of the second component (28); Second rotation axis (X): a rotation axis formed by the shaft (62) of the drive head (60) and the central shaft hole (45) of the second cavity (48); The distance between the two axes is D=R1+R2, where R1 is the first gear pitch circle radius and R2 is the second gear pitch circle radius.

5. The dual-mode ratchet wrench according to claim 1, characterized in that: The ratchet mechanism comprises a pawl (95), a central shaft (94) and two recesses (96); A spring (98) and a steel ball (99) are arranged in the countersunk hole (36), and the steel ball and the recessed portion (96) of the ratchet wheel form a positioning structure.

6. The dual-mode ratchet wrench according to claim 1, characterized in that: The driving head comprises a second tooth portion (61), a shaft (62) and a driving joint (63); The driving joint (63) is used to connect to a member to be driven.

7. The dual-mode ratchet wrench according to claim 1, characterized in that: The ratio of the length L1 of the first handle (31) to the length L2 of the second handle (41) is in the range of 1.5≤L1 / L2≤2.5; The transmission ratio i ranges from 1.2≤i≤2.

5.

8. The dual-mode ratchet wrench according to claim 1, characterized in that: The reversing switch (70) comprises a toggle portion (70a), a shaft (72) and a joint (71); the toggle portion (70a) is used to switch the meshing direction; and the joint (71) cooperates with the receiving hole (93) for transmission.

9. The dual-mode ratchet wrench according to claim 1, wherein, Also includes: A first cover member (33) is fixed to the first accommodation chamber (32) by means of screws (82), and is provided with a first through hole (34) cooperating with the ratchet center shaft (94) and a second through hole (35) cooperating with the first gear shaft (91); The second cover member (43) is fixed to the second accommodation chamber (42) by means of screws (85), and is provided with a first shaft hole (44a) cooperating with the first gear shaft (91), a second shaft hole (44b) cooperating with the drive head shaft (62), and a through hole (44) cooperating with the reversing switch shaft (72).

10. A method for initial thread alignment using the dual-mode ratchet wrench according to any one of claims 1-9, characterized in that include: Balance-maintaining stage: holding the second handle (41) with one hand to maintain the driving head (60) in coaxial contact with the bolt / nut; Initial tightening stage: the other hand operates the first handle (31) to perform a small angle (α≤15°) reciprocating rotation, and the thread self-alignment is achieved by utilizing the clearance fit between the first gear (90) and the second tooth portion (61); Torque transmission stage: using the second handle (41) as a fulcrum, the amplified torque is generated through the lever movement of the first handle (31).

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