Ratchet wrench with drive pin

Abstract

The present invention provides a ratchet wrench assembly, which includes a head, a ratchet gear, a yoke, one or more drive pins, a body and a ratchet pawl. The body may include one or more drive edges and a fastener driving member. The first drive edge can engage with the first drive pin so that reciprocating motion of the yoke causes the body and the fastener driving member to rotate about a rotation axis via engagement of the first drive pin between the inner surface of the yoke ring and the first drive edge. The ratchet pawl may include a first ratchet tooth, which is configured to engage with the gear teeth of the ratchet gear to allow the body to move in a first rotational direction relative to the head, and engage the gear teeth to prevent the body from moving in an opposite second rotational direction relative to the head.

Description

Technical Field

[0001] The exemplary embodiments relate generally to wrenches, and more particularly to ratchet wrenches, including electric ratchet wrenches. Background Art

[0002] Ratchet wrenches have long proven to be an effective tool for securing and removing fasteners, especially in environments with limited space, by eliminating the need to remove and reposition the wrench with each rotation. The continuous engagement between the ratchet wrench and the fastener greatly increases efficiency in operating the fastener, as there is no need to reposition the wrench on the fastener with each rotation.

[0003] In order to further improve the efficiency of ratchet wrenches, electric ratchet wrenches have been developed. This electric wrench not only has the advantages of manually rotating ratchet wrenches, but also has the function of rotating fasteners by a motor (such as electric, pneumatic, etc.). Some electric ratchet wrenches rely on manual rotation for high-torque operations (for example, initial loosening or final tightening of fasteners) and support low-torque operations by rotating the wrench electrically. Allowing the use of the same tool to manually rotate the ratchet and electrically rotate the fastener will bring complexity to the design of the tool. Although the functions of such electric ratchet wrenches have been developed, such solutions are generally physically large and the conversion between manual rotation mode and electric rotation mode is cumbersome. Therefore, there is a need for continued innovation and improvement in order to develop a compact, easy-to-operate electric ratchet wrench. Summary of the Invention

[0004] According to some exemplary embodiments, an exemplary ratchet wrench assembly is provided. The exemplary ratchet wrench assembly may include a head, a ratchet gear, a yoke, at least one drive pin, a body, and a ratchet pawl. The ratchet gear may be disposed within the head and may include gear teeth. The yoke may be disposed within the head and configured to reciprocate about a rotational axis to rotate a fastener. The yoke may include a yoke ring. The body may include at least one drive edge and a fastener driving member. A first drive edge of the at least one drive edge may engage with a first drive pin of the at least one drive pin, such that reciprocating motion of the yoke causes the body and the fastener driving member to rotate about the rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge. The ratchet pawl may include a first ratchet tooth. The first ratchet tooth may be configured to engage with the gear teeth of the ratchet gear to allow movement of the body relative to the head in a first rotational direction, and to engage with the gear teeth to prevent movement of the body relative to the head in a second rotational direction. The second rotational direction may be opposite to the first rotational direction.

[0005] According to some exemplary embodiments, another exemplary ratchet wrench assembly is provided. The exemplary ratchet wrench assembly may include a head, a ratchet gear, a yoke, a motor assembly, at least one drive pin, a body, and a ratchet pawl. The ratchet gear may be disposed within the head and may include gear teeth. The yoke may be disposed within the head and configured to reciprocate about a rotational axis to rotate a fastener. The yoke may include a yoke ring. The motor assembly may be battery-powered, and the motor assembly may include a motor configured to be operably coupled to the yoke to generate reciprocating motion of the yoke about the rotational axis in response to rotational motion of the motor shaft. The body may include at least one drive edge and a fastener driving member. A first drive edge of the at least one drive edge may engage with a first drive pin of the at least one drive pin, such that reciprocating motion of the yoke may cause the body and the fastener driving member to rotate about the rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge. The ratchet pawl may include first ratchet teeth. The first ratchet teeth may be configured to engage gear teeth of the ratchet gear to allow movement of the body relative to the head in a first rotational direction and to engage gear teeth to prevent movement of the body relative to the head in a second rotational direction. The second rotational direction may be opposite to the first rotational direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Having described some example embodiments in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and in which:

[0007] Figure 1 shows a perspective front view of a ratchet wrench according to an exemplary embodiment;

[0008] Figure 2 shows a perspective rear view of a ratchet wrench according to an exemplary embodiment;

[0009] Figure 3 shows an exploded view of a ratchet wrench according to an exemplary embodiment;

[0010] Figure 4A shows a block diagram of a ratchet wrench according to an example embodiment;

[0011] Figure 4B shows a side view of the head and neck of a ratchet wrench according to an exemplary embodiment;

[0012] Figure 5 illustrates an exploded view of select components of a ratchet mechanism of a ratchet wrench according to an exemplary embodiment;

[0013] Figure 6 shows a partially exploded view of the head and neck of a ratchet wrench according to an exemplary embodiment;

[0014] Figure 7 shows a portion of a ratchet mechanism of a ratchet wrench including a body according to an exemplary embodiment;

[0015] Figure 8 shows a portion of a ratchet mechanism of a ratchet wrench according to an example embodiment, the ratchet wrench including a body separate from a yoke;

[0016] Figure 9 shows a yoke separated from a pin ring according to an exemplary embodiment;

[0017] Figure 10 shows a front view of a yoke and a pin ring according to an exemplary embodiment;

[0018] Figure 11 shows a perspective rear view of a yoke and a pin ring according to an exemplary embodiment;

[0019] Figure 12 shows a perspective side view of a body of a ratchet wrench according to an exemplary embodiment;

[0020] Figure 13 shows another perspective side view of the body of a ratchet wrench according to an exemplary embodiment;

[0021] Figure 14 shows a front view of a body of a ratchet wrench according to an exemplary embodiment;

[0022] Figure 15 shows a ratchet pawl of a ratchet wrench according to an exemplary embodiment;

[0023] Figure 16 A ratchet wrench according to an exemplary embodiment is shown. Figure 4B A cross-sectional front view taken along AA showing the engagement between the drive pin and the drive edge of the body;

[0024] Figure 17 A ratchet wrench according to an exemplary embodiment is shown. Figure 4B a cross-sectional front view taken along BB of FIG, showing the ratchet pawl and selector member facilitating rotation of the fastener in a first direction;

[0025] Figure 18 illustrates a cross-sectional front view of a ratchet wrench according to an exemplary embodiment showing a ratchet pawl and a selector member facilitating rotation of a fastener in a second direction;

[0026] Figure 19 A selector switch of a ratchet wrench is shown according to an exemplary embodiment;

[0027] Figure 20 shows a ratchet pawl and selector member coupled to a pin ring according to an exemplary embodiment; and

[0028] Figure 21 An interior portion of a handle of a ratchet wrench is shown according to an exemplary embodiment. DETAILED DESCRIPTION

[0029] Some exemplary embodiments will be described more fully below with reference to the accompanying drawings, some, but not all, of which are shown. Indeed, the examples described and shown herein should not be construed as limiting the scope, applicability, or configuration of the present disclosure. Rather, these exemplary embodiments are provided so that the present disclosure satisfies applicable legal requirements. Like reference numerals denote like elements throughout. As used herein, an operative connection should be understood to refer to a direct or indirect connection, in either case, that enables functional interconnection of components that are operatively coupled to one another.

[0030] According to some exemplary embodiments, a ratchet assembly is provided that can utilize a toothless drive ring and a removable drive pin as a drive mechanism for a ratchet wrench or ratchet wrench assembly, the removable drive pin being engaged between the inner surface of the toothless drive ring and the drive edge of the inner ratchet wrench body. The toothless drive ring and drive pin can be implemented in an electric ratchet wrench or a ratchet wrench that is only rotated manually. In this regard, the exemplary embodiments are described in the context of an electric ratchet wrench that can be easily switched between an electric rotation mode and a manual rotation mode. Therefore, an exemplary embodiment implemented in a manual rotation mode can include a toothless drive ring that is maintained in a fixed rotational position relative to the head of the ratchet wrench. With respect to electric embodiments, the exemplary ratchet wrench or ratchet wrench assembly can operate in an electric rotation mode (e.g., for low-torque rotation of a fastener) as well as a manual rotation mode (e.g., for high-torque rotation of a fastener). The electric rotation mode can be used to improve the efficiency of installing a fastener before final tightening in the manual rotation mode, or removing a fastener after initially loosening the fastener using the manual rotation mode. Both the electric rotation mode and the manual rotation mode can utilize a shared ratchet mechanism, and switching between these modes is intuitive. The electric rotation mode can be achieved by, for example, simply pressing a motor operating button to activate the motor to rotate the drive handle. The manual rotation mode can be achieved by simply manually rotating the ratchet wrench handle to rotate the drive handle and ratchet. In addition, the ratchet wrench assembly can include a selector switch that can be actuated to change the ratchet direction of the ratchet wrench and switch the ratchet wrench between tightening and loosening.

[0031] According to some exemplary embodiments, Figure 1An exemplary ratchet wrench 10 (also referred to as a ratchet wrench assembly) is shown in FIG, which provides a perspective front view of the ratchet wrench 10. In this regard, the ratchet wrench 10 may include a head 12, a neck 14, and a handle 16. As further described below, the head 12 of the ratchet wrench 10 may house a ratchet mechanism configured to support both electric and manual rotation of the ratchet. The ratchet mechanism may be disposed within a cavity in the head 12, and the ratchet mechanism may be secured within the head 12 and protected from dust and debris by a cover 24, which may be secured to the head 12 by fasteners 26.

[0032] The neck 14 of the ratchet wrench 10 can be a connecting section connected between the head 12 and the handle 16. According to some exemplary embodiments, the neck 14 is generally narrower than the head 12 and the handle 16. According to some exemplary embodiments, the head 12 and the neck 14 can be formed as a single integrated component (e.g., a steel component). As described in further detail below, the neck 14 can include an inner bore that accommodates a drive shaft that is rotated by the motor to support the electric rotation mode.

[0033] A handle 16 can be coupled to the neck 14 and extend away from the head 12 to provide rotational leverage for a user grasping the handle 16. The shape and size of the handle 16 can be adapted to fit the user's hand. According to some exemplary embodiments, the handle 16 can be cylindrical and can include an internal cavity for housing, for example, electronic components such as a battery and a motor, as described further below. The cavity in the handle 16 can be accessed via a cover 18 that can be removably coupled to the handle 16, for example, by corresponding threads.

[0034] like Figure 1 As shown, a drive handle 20 (also referred to as a fastener driving member) may extend from the front of the head 12 of the ratchet wrench 10. The drive handle 20 may be shaped (e.g., square) to accommodate a fastening member, such as a socket. The drive handle 20 may be received in the rear opening of the socket, and the socket may be configured to provide an interface at the front of the socket (e.g., via the front opening) for coupling the ratchet wrench 10 to a fastener (e.g., a nut, bolt, screw, etc.). According to some exemplary embodiments, a retaining bearing 22 may be provided within the drive handle 20 to assist in securing the fastening member to the drive handle 20. In manual rotation mode, the drive handle 20 may be configured to rotate relative to the head 12 in a ratcheting direction about the rotation axis 25 of the ratchet wrench 10, as indicated by arrow 35, and prevented from moving relative to the head 12 in a driving direction to rotate the fastener. In electric rotation mode, the drive handle 20 may be configured to rotate in a driving direction to rotate the fastener, but not in a ratcheting direction.

[0035] Figure 2A perspective rear view of the ratchet wrench 10 is shown, illustrating additional features of the rear side of the head 12 and handle 16. In this regard, a selector switch 40 is located on the rear surface of the head 12. As further described below, the selector switch 40 can be configured to allow a user to rotate the selector switch 40, as indicated by arrow 65, to place the ratchet wrench 10 in either a tightening mode or a loosening mode. Alternatively, the selector switch 40 can be depressible and control the operation of the retaining bearing 22 to lock a fastening member to the drive shank 20 or allow the fastening member to be released from the drive shank 20.

[0036] In addition, the motor operating button 30 is shown as being disposed on the rear side of the handle 16. In this regard, because the handle 16 can be wider than the neck 14, the neck 14 (or handle 16) can include a curved transition region 15. The motor operating button 30 can be designed to be flush with the curvature of the transition region 15 to limit or prevent accidental actuation of the motor operating button 30. The central handle axis 45 of the ratchet wrench 10 can be defined as passing through the center of the handle 16 and the neck 14. According to some exemplary embodiments, the motor operating button 30 can be configured to be driven downward according to arrow 55 to activate motor rotation and returned upward in the opposite direction of movement to stop motor operation. Therefore, activation of the motor operating button 30 can be carried out in the direction of arrow 55, which can be parallel to the central handle axis 45.

[0037] Figure 3 An exploded perspective view of the ratchet wrench 10 is shown. In this regard, according to some exemplary embodiments, the electric rotation mode of operation may be powered by an onboard battery 19. The battery 19 may be enclosed in a cavity within the handle 16 and may be removed and replaced by removing the cover 18 to access the cavity. The battery 19 may be any type of battery, such as a rechargeable battery (e.g., a lithium-ion battery). The battery 19 may include contacts that are electrically coupled to circuitry within the handle 16 to provide power to the circuitry.

[0038] Figure 4A A conceptual block diagram of a ratchet wrench 10 is shown, and exemplary components of the ratchet wrench 10 will be described in detail below. In this regard, as noted above, the ratchet wrench 10 may include a head 12, a neck 14, and a handle 16. Within the head 12, a ratchet mechanism 50 may be housed that provides for rotation of the drive handle 20. The ratcheting direction of the ratchet wrench 10 may be controlled by actuating a selector switch 40.

[0039] In the electric rotation mode, the motor 60 in the handle 16 can rotate the drive shaft 62, which is operably coupled to the ratchet mechanism 50 to rotate the drive handle 20. The motor 60 can be a DC motor. According to some exemplary embodiments, the motor 60 can be configured to rotate at a relatively high rotation per minute with a relatively low torque.

[0040] The motor 60 may be controlled by an electronic circuit 70, which may be electrically connected to the motor 60. The electronic circuit 70 may include active and / or passive electronic components configured to perform the functions described with respect to the electronic circuit 70. In this regard, the electronic circuit 70 may include switches, transistors, a controller (e.g., in the form of a processor, an application specific integrated circuit ASIC, a field programmable gate array FPGA, etc.), capacitors, resistors, etc.

[0041] According to some exemplary embodiments, the electronic circuit 70 may include a switch 36 that can be closed by actuating the motor operating button 30. In this regard, the motor operating button 30 may be operably coupled to a button extension 32, which may be formed as a rigid, elongated member. The button extension 32 may be configured to be operably coupled to the leaf spring 34 so that the button extension 32 and the motor operating button 30 are biased upward, wherein the leaf spring 34 is not in physical contact with the switch 36. However, when a user presses the motor operating button 30, the button extension 32 is also actuated, thereby pressing the leaf spring 34 into the switch 36 to close the switch 36. In response to the closure of the switch 36, the electronic circuit 70 may be configured to cause the motor 60 to rotate the drive shaft 62.

[0042] The electronic circuit 70 can also be electrically coupled to the battery 19. Thus, the battery 19 can provide power to the electronic circuit 70. The electronic circuit 70 can be configured to control the transfer of power from the battery 19 to the motor 60 in response to the closure of the switch 36. Additionally, the electronic circuit 70 can be configured to control the transfer of power from the battery 19 to the motor 60 based on additional criteria. In this regard, the electronic circuit 70 can be configured to monitor the current consumed by the motor 60. As the torque on the motor 60 increases (e.g., due to the ratchet wrench 10 tightening the fastener), the current consumed by the motor 60 can also increase. According to some exemplary embodiments, the electronic circuit 70 can be configured to interrupt the transfer of electrical power to the motor 60 in response to the current of the motor 60 exceeding a threshold current. Thus, when the torque on the fastener reaches a corresponding torque threshold, the motor 60 can be stopped to prevent the fastener from continuing to rotate.

[0043] The electronic circuit 70 can be configured to monitor the current consumed by the motor 60 by measuring the voltage between the terminals of the motor 60 (because the motor operation button 30 is also pressed). Alternatively, the voltage on the resistor connected in parallel with the terminals of the motor 60 can be monitored using, for example, a monitoring voltage configured by a processor, and the measured voltage value is compared with a predefined threshold. As the voltage drops, the current consumed by the motor 60 increases. In addition, the electronic circuit 70 may include a controllable switch in the form of, for example, a transistor (e.g., a bipolar transistor, a field effect transistor, etc.). The power supply to the motor 60 can be through the transistor and controlled by a signal on the gate terminal of the transistor. In this regard, when the current or voltage exceeds a predetermined threshold, the signal on the gate of the transistor can be controlled to interrupt the power supply to the motor 60. Therefore, the electronic circuit 70 can be configured to monitor the current of the motor 60 and interrupt the current to the motor 60 in response to the current of the motor 60 exceeding the threshold current.

[0044] According to some exemplary embodiments, by avoiding high current conditions, battery life can be extended, particularly in terms of the number of fasteners that can be installed on a single battery charge. Thus, according to some exemplary embodiments, by implementing such a current threshold / motor shutoff technique, more fasteners can be installed relative to implementations that allow current to exceed the threshold.

[0045] Due to the inclusion of battery 19, ratchet wrench 10 can be a cordless tool. However, according to some exemplary embodiments, ratchet wrench 10 can be corded and draw power from an AC outlet, etc., in addition to battery 19. Furthermore, according to some exemplary embodiments, ratchet wrench 10 can be pneumatically driven rather than electrically powered. In such exemplary embodiments, motor 60 can be a pneumatic motor that converts air pressure into rotational motion for delivery to ratchet mechanism 50.

[0046] Figure 4B A side view of the upper portion of the ratchet wrench 10 is shown, including the head 12 and the neck 14. As shown, the drive handle 20 extends forward from the head 12, and the selector switch 40 may be disposed on the rear side of the head 12.

[0047] The construction and operation of the ratchet mechanism 50 will be described with reference to Figures 5 to 20 Provide a description. Figure 5 An exploded view of selected components of an example ratchet mechanism of a ratchet wrench 10 is shown. In this regard, the head 12 has an internal head cavity 13. Within the head cavity 13, a ratchet gear 130 has gear teeth 132. The ratchet gear 130 can be integrated into the head 12 such that the ratchet gear 130 and the gear teeth 132 are part of a single molded head 12. The gear teeth 132 can be arranged on an inner surface of the ratchet gear 130 such that the gear teeth 132 extend toward the rotational axis 25 ( Figure 5 not shown).

[0048] Figure 5 The illustrated assembly may further include a bushing drive member 160 and a drive bushing 164. The bushing drive member 160 may be rotated by the drive shaft 62. The bushing drive member 160 may include a cavity for accommodating the end of the drive shaft 62. In this regard, according to some exemplary embodiments, the cavity in the bushing drive member 160 for accommodating the drive shaft 62 may be keyed to the drive shaft 62, thereby rotating the bushing drive member 160 when the drive shaft 62 rotates. The bushing drive member 160 may further include a bushing drive protrusion 162. The bushing drive protrusion 162 may be formed as a column offset from the center of rotation of the bushing drive member 160. Therefore, when the bushing drive member 160 is rotated by the drive shaft 62, the bushing drive protrusion 162 may perform a circular motion around the axis of rotation of the drive shaft 62. The drive bushing 164 may have a circular shape (e.g., a spherical shape) having a cavity for accommodating the bushing drive protrusion 162. Therefore, the drive bushing 164 may also move in a circular motion about the rotational axis of the drive shaft 62. According to some example embodiments, a motor assembly may be defined that includes the motor 60, the drive shaft 62, the bushing drive member 160, and the drive bushing 164.

[0049] Figure 5 The illustrated assembly may also include a yoke 100. The yoke 100 may include a yoke ring 102 and a drive bushing receptacle 106. The yoke ring 102 (also referred to as a drive ring) may include a toothless inner surface 104. In this regard, the inner surface 104 of the yoke ring 102 is substantially smooth. The drive bushing receptacle 106 may be fixed to the yoke ring 102. The drive bushing receptacle 106 may be formed by two opposing bow legs extending from the yoke ring 102 to form a curved groove. As further described below, the drive bushing receptacle 106 may be sized to fit a drive bushing 162 into the groove of the drive bushing receptacle 106.

[0050] Figure 5The assembly shown may also include a pin ring 110 and one or more drive pins, in this case, a plurality of drive pins. In the exemplary embodiment described herein, three drive pins may constitute the plurality of drive pins, but those skilled in the art will appreciate that, according to some exemplary embodiments, two or more drive pins may be used. The pin ring 110 may include respective slots for accommodating each drive pin within the plurality of drive pins. With each drive pin mounted in a corresponding slot of the pin ring 110, the drive pins are forced to move in unison when the pin ring 110 rotates. The plurality of drive pins (including the first drive pin) may include a control drive pin 122 and one or more follower drive pins 120. The control drive pin 122 may be longer than the follower drive pin 120, and the increased length of the control drive pin 122 may enable the control drive pin 122 to control the movement of the pin ring 110, thereby controlling the movement of the follower drive pin 120.

[0051] According to some exemplary embodiments, Figure 5 The illustrated assembly also includes a body 80. The body 80 can include features that couple the various components of the ratchet wrench 10 to the body 80. The body 80 can include separate cavities to accommodate the ratchet pawl 140, the selector member 150, the selector cylinder 42 with the retaining spring 46, and the retaining bearing 22. In addition, the drive handle 20 can extend from the front end of the body 80. Moving from the front end of the body 80 to the rear end of the body 80, the body 80 can include a drive plate 82 located behind the drive handle 20, followed by separate, opposing side cavities for the ratchet pawl 140 and the selector member 150. At the rear end of the body 80, a rear cavity is provided that extends along the rotational axis 25 of the ratchet wrench 10 to accommodate the selector cylinder 42 extending from the selector switch 40 and the retaining spring 46. The ratchet pawl 140 may be pivotally secured to the body 80 by a ratchet pawl pin 142 , and the selector member 150 may be pivotally secured to the body 80 by a selector member pin 152 .

[0052] Since the selector member 150 can be pivotally fixed to the body 80 via the selector member pin 152, the selector member 150 can rotate together with the body 80 and the drive handle 20 about the rotation axis 25. The selector member 150 also includes a control drive pin accommodating portion 154, which is formed as a slot between two legs of the selector member 150. The control drive pin 122 can be accommodated within the control drive pin accommodating portion 154. Therefore, since the control drive pin 122 is accommodated in the control drive pin accommodating portion 154 of the selector member 150, the control drive pin 122 can also rotate together with the selector member 150 about the rotation axis 25 together with the body 80 and the drive handle 20. In addition, since the control drive pin 122 can also be arranged in the corresponding slot of the pin ring 110, the pin ring 110 and the follower drive pin 120 (arranged in the corresponding slot of the pin ring 110) can also rotate together with the body 80 and the drive handle 20 about the rotation axis 25. Furthermore, since the ratchet pawl 140 is fixed to the body 80 via the ratchet pawl pin 142 , the ratchet pawl 140 can also rotate together with the body 80 and the drive handle 20 around the rotation axis 25 .

[0053] Reference Figure 6 , shows a partially exploded view of the head 12 and neck 14 of the ratchet wrench 10 with reference to the rotational axis 25. In this regard, the ratchet mechanism is removed from the head 12. Furthermore, the drive shaft 62 is shown removed from the neck cavity 63. As can be seen in the attached details, a bushing drive member 160 with a drive bushing 162 is mounted within the drive bushing receptacle 106 of the yoke 100. Due to the offset and circular orbital motion of the drive bushing 162, with each rotation of the drive bushing 162, the drive bushing 162 causes the yoke 100 to reciprocate or repeatedly rotate about the rotational axis 25. With each rotation of the drive bushing 162, the drive bushing 164 slides back and forth within the groove formed by the drive bushing receptacle 106. Therefore, due to the interaction between the drive bushing 162 and the drive bushing receptacle 106, the circular orbital motion of the drive bushing 162 is converted into a planar reciprocating motion of the yoke 100.

[0054] In addition, if Figure 6 As shown, the pin ring 110 can be disposed within the yoke ring 102, with each drive pin (i.e., the control drive pin 122 and the follower drive pin 120) disposed in a corresponding slot in the pin ring 110. Thus, the drive pins can be confined within the corresponding spaces formed by the slots in the pin ring 110 and the inner surface 104 of the yoke ring 102. Furthermore, the pin ring 110 can be disposed about the body 80 such that the drive shank 20 extends through the central openings in the pin ring 110 and the yoke ring 102.

[0055] Figure 71 shows a perspective side view of the body 80, yoke 100, and pin ring 110 in an assembled configuration isolated from other components of the ratchet wrench 10 with reference to the axis of rotation 25, according to some exemplary embodiments. Figure 6 Similarly, the pin ring 110 of the yoke 100 is mounted within an opening within the yoke ring 102. Drive pins 122, 120 are respectively disposed within corresponding grooves within the pin ring 110 and contact the inner surface (i.e., the toothless, substantially smooth inner surface) of the yoke ring 102. The pin ring 110 is disposed around a portion of the body 80, with the drive handle 20 extending forward within the pin ring 110. A ratchet pawl 140 is also disposed within a ratchet pawl-side cavity of the body, behind the pin ring 110 and the yoke ring 102.

[0056] Figure 8 Shown Figure 7 A perspective view of the assembly with reference to the axis of rotation 25, wherein the pin ring 110 and the yoke 100 are removed from the body 80. Figure 8 As shown, a pin ring 110 having drive pins can be positioned on the drive plate 82 of the body 80. The drive plate 82 can include one or more drive edges (including a first drive edge), wherein each drive edge 84 is positioned to engage one of the drive pins 122, 120. As further described below, the drive pins 122, 120 can be held in place by the pin ring 110 so that when the pin ring 110 rotates, the drive pins 122, 120 move together, and the drive pins 122, 120 can also be disposed between the corresponding drive edge 84 and the inner surface 104 of the yoke ring 102.

[0057] in addition, Figure 8 1 and 2. The front face of the ratchet pawl 140 is shown in FIG. 1 . In this regard, the ratchet pawl 140 can include a first ratchet tooth 144 and a second ratchet tooth 146. The front face of the ratchet pawl 140 can be convex to facilitate engagement with the gear teeth 132 on the inner surface of the head cavity 13. As further described below, the ratchet pawl 140 can be configured to pivot within the side ratchet pawl cavity of the body 80 in response to movement of the selector switch 40 between the fastener tightening position and the fastener loosening position.

[0058] Figure 9 A perspective view of the yoke 100 is provided, according to some exemplary embodiments, with the pin ring 110 removed relative to the rotation axis 25. In this regard, as described above, the pin ring 110 can be disposed within the central opening of the yoke ring 102. According to some exemplary embodiments, the pin ring 110 need not physically contact the inner surface 104 of the yoke ring 102. Instead, the drive pins 122, 120 can physically contact the inner surface 104 of the yoke ring 102 and the walls of the corresponding slots in the pin ring 110.

[0059] Figure 101 shows a front view of the yoke 100 and the pin ring 110 in an assembled configuration according to some exemplary embodiments. In this regard, reference is made to Figure 10 , the control drive pin 122 and the follower drive pin 120 can be in physical contact with the inner surface 104 of the yoke ring 102. In addition, due to Figure 10 The exemplary embodiment shown includes three drive pins. According to some exemplary embodiments, the drive pins may be disposed at locations around the outer circumference of the pin ring 110 such that each drive pin is disposed at the same distance from two adjacent drive pins. In this regard, according to some exemplary embodiments, the drive pins may be spaced approximately 120 degrees apart from one another around the pin ring 110 relative to an origin located at the center of the central opening in the pin ring 110.

[0060] and Figure 10 similar, Figure 11 A perspective rear view of the yoke 100 and the pin ring 110 in an assembled configuration is shown, according to some exemplary embodiments. Figure 11 As clearly shown in FIG, the control drive pin 122 has a longer length than the follower drive pin 120. The extended portion of the control drive pin 122 can be configured to engage with the selector member 150 so that when the selector member 150 moves, the control drive pin 122 also moves. The movement of the control drive pin 122 can, in turn, cause the pin ring 110 to rotate within the yoke ring 102 and cause the follower drive pin 120 to move accordingly.

[0061] Figure 12 and 13 A perspective side view of the body 80 separated from the other components of the ratchet wrench 10 is shown, according to some exemplary embodiments. In this regard, the body 80 can include a drive handle 20, a drive plate 82, a side ratchet pawl cavity 141, and a side selector member cavity 151. The drive handle 20 can also include a stop bearing opening 23, which can be sized to allow the stop bearing 22 to extend from the stop bearing opening 23 without allowing the stop bearing 22 to pass through the stop bearing opening 23. The drive plate 82 having a drive edge 84 is also shown.

[0062] Figure 14 A front view of the body 80 according to some example embodiments is provided. The structure of the drive plate 82 can be Figure 14As described above, the drive plate 82 can be a feature on the body 80 that includes one or more drive edges 84, in this case a plurality of drive edges 84. According to some example embodiments, the drive edge 84 can be linear or substantially linear. However, according to some example embodiments, the drive edge 84 can have a different edge profile, for example, the drive edge 84 can be substantially arcuate (concave or convex) or curved. According to some exemplary embodiments, since the ratchet wrench 10 can, for example, have three drive pins, the drive plate 82 can have three drive edges 84 that form a triangular shape. The drive edge 84 can extend between the edges of the rear periphery of the body 80. As Figure 14 As shown, if the driving edges 84 extend beyond the edge of the rear perimeter of the body 80, the driving edges 84 may form a triangular shape, such as an equilateral triangle. However, because the driving edges 84 do not extend, the drive plate 82 may include a rounded edge 87 between each driving edge 84.

[0063] Figure 15 A side view of the ratchet pawl 140 of the ratchet wrench 10 is shown. In this regard, the ratchet pawl 140 can have a generally convex front face, with first ratchet teeth 144 disposed at a first end of the front face and second ratchet teeth 146 disposed at a second end of the front face of the ratchet pawl 140. The first ratchet teeth 144 and the second ratchet teeth 146 can be configured to engage with the gear teeth 132. As such, the first ratchet teeth 144 can have a convex curvature that complements the concave curvature of the gear teeth 132, and the second ratchet teeth 146 can have a convex curvature that complements the concave curvature of the gear teeth 132.

[0064] In addition, the ratchet pawl 140 may also include a pin opening 148 configured to receive the ratchet pawl pin 142 to pivotally secure the ratchet pawl 140 within the side pawl cavity 141 of the body 80. In this manner, the ratchet pawl 140 may pivot about the ratchet pawl pin 142 in response to movement of the ratchet pawl control member 143 within the ratchet pawl control recess 148. Additionally, the angle of the walls of the ratchet pawl control recess 148 may be configured to correlate with the position of the first and second ratchet teeth 144, 146 to position the ratchet pawl 140 in either the tightening / forward or loosening / reverse positions and to allow the ratchet pawl 140 to pivot or rock slightly against the ratchet pawl control member 143, which may be spring-biased against the walls of the ratchet pawl control recess 148 to facilitate ratcheting functionality relative to the gear teeth 132. During ratcheting operation, depending on the position of the ratchet pawl 140, the first ratchet teeth 144 or the second ratchet teeth 146 may maintain physical contact with the gear teeth 132. In this regard, based on the position of the ratchet pawl 140 and whether the first ratchet teeth 144 or the second ratchet teeth 146 are engaged with the gear teeth 132, a fastener rotational direction and a fastener stationary rotational direction may be defined for the ratchet wrench 10, as further described below.

[0065] Having shown and described the various features of the drive pin, drive edge 84, yoke ring 102, and ratchet pawl 140, Figure 16 A cross-sectional front view of the ratchet wrench 10 is shown illustrating the engagement between the drive pins 122, 120, the drive edge 84, and the inner surface 104 of the yoke ring 102 to illustrate the functional operation of the ratchet mechanism, according to some exemplary embodiments. In this regard, Figure 17 The relative engagement of the ratchet pawl 140 and the gear teeth 132 is shown according to some exemplary embodiments.

[0066] As described above, the drive bushing 162 can be configured to perform circular orbital motion about the axis of rotation of the drive shaft 62, which can also be the central handle axis 45 due to the bushing drive member 160 offsetting it from the axis of rotation 45. Due to the sliding and rotational engagement between the drive bushing 162 and the drive bushing receiving portion 106 of the yoke 100, the circular orbital motion of the drive bushing 162 can be converted into reciprocating planar motion of the yoke 100 and the yoke ring 102, as shown by arrows 107 and 109. Figure 16 and 17 In the illustrated component positions, rotational direction 107 (counterclockwise) is the fastener rotational direction, while rotational direction 109 (clockwise) is the fastener stationary direction.

[0067] The drive pins 122, 120 can be disposed within respective annular segments 85 (also referred to as drive pin cavities) formed by the inner surface 104 of the yoke ring 102 (forming the curved edge of the annular segment) and the drive edge 84 (forming the chord of the annular segment). As further described below, the drive pins 122, 120 can move within these respective annular segments 85 in response to actuation of the selector switch 40 to move the selector member 150 and the control drive pin 122. Because the follower drive pin 120 is coupled to the control drive pin 122 via the pin ring 110, the follower drive pin 120 also moves in response to movement of the control drive pin 122 by the selector member 150. Thus, the drive pins 122, 120 can be positioned within the annular segment 85 between the drive edge 84 and the inner surface 104 of the yoke ring 102 adjacent one of the narrowed ends of the annular segment 85, and in physical contact therewith.

[0068] Because the drive pins 122, 120 are positioned in physical contact with the yoke ring 102 and the drive plate 82 via the drive edge 84, when the yoke ring 102 is rotated in, for example, a first rotational direction, the movement of the yoke ring 102 can be transmitted to the drive edge 84 via the drive pins 122, 120 to rotate the drive plate 82. Because the drive plate 82 and the drive handle 20 can be integral components of the body 80, the drive plate 82 and the drive handle 20 can rotate together. In addition, because the ratchet pawl 140 is fixed to the body 80, the ratchet pawl 140 can perform a ratcheting function in response to rotation of the body 80 relative to the head 12 (this is due to the engagement of the teeth of the ratchet pawl 140 with the gear teeth 132).

[0069] More specifically, due to the shape of the annular section 85 and the placement of the drive pins 122, 120 within the annular section 85 (due to the position of the selector switch 40, as further described below), movement of the yoke ring 102 in the first rotational direction can cause compression of the drive pins 122, 120 between the inner surface 104 of the yoke ring 102 and the drive edge 84. This pressure can be caused by the drive pins 122, 120 being pushed against the narrower end of the annular section 85. Due to this pressure, movement of the yoke ring 102 in the first rotational direction can cause rotational movement of the drive plate 82 in the first rotational direction and associated ratcheting movement of the ratchet pawl 140 (caused by the ratchet pawl 140 responding to the corresponding position of the selector switch 40). Consequently, due to the interaction with the drive pins 122, 120, relative movement between the yoke ring 102 and the drive handle 20 in the first rotational direction (i.e., the yoke ring 102 and the drive handle 20 rotate together) as described above does not occur.

[0070] However, when the yoke ring 102 moves in the second rotational direction (opposite to the first rotational direction) due to the reciprocating motion of the yoke 100, the drive pins 122, 120 may not be subjected to pressure because the drive pins 122, 120 are not pushed to the narrower end of the annular section 85. Thus, the movement of the yoke ring 102 in the second rotational direction is not transmitted to the drive plate 82, and thus the yoke ring 102 can rotate in the second rotational direction while the drive plate 82 (and the drive handle 20) remain stationary. In addition, due to the positioning of the ratchet pawl 140, the teeth of the ratchet pawl 140 can engage with the gear teeth 132, so that the relative rotation of the ratchet pawl 140 and the relative rotation of the body 80 and the drive plate 82 in the second rotational direction are prevented by the ratchet pawl 140. In this way, due to the non-ratchet engagement of the teeth of the ratchet pawl 140 with the gear teeth 132, when the yoke 100 and the yoke ring 102 rotate in the second rotational direction (i.e., the yoke ring 102 and the drive handle 20 do not rotate together), the body 80 is prevented from moving relative to the head 12.

[0071] Having generally described the interaction between the yoke ring 102, the drive pins 122, 120 and the drive edge 84, reference will now be made to the specific positions of the drive pins 122, 120 in the annular segment 85, the ratchet pawl 140 and the like. Figure 16 and 17 The operation of the ratchet wrench 10 will be described in more detail with reference to the rotational directions indicated by arrows 107 and 109. In this regard, the drive pins 122, 120 are positioned counterclockwise to the left of the annular segment 85 (as viewed from the axis of rotation 25) due to the position of the selector switch 40, and the drive pins 122, 120 are constrained to these positions by the grooves of the drive pins 122, 120 within the pin ring 110. As further described below, due to the operation of the selector member 150 in conjunction with the control of the drive pin 122, the pin ring 110 and the follower drive pin 120 can be maintained in a stationary position relative to the drive plate 82.

[0072] In this regard, when the yoke 100 and the yoke ring 102 rotate in a rotational direction 107 (e.g., a first rotational direction), the drive pins 122, 120 are pushed toward the narrowed end of the annular segment 85 and can be compressed between the drive edge 84 and the inner surface of the yoke ring 102. Due to the described pressure and corresponding static friction between each drive pin 122, 120, the inner surface of the yoke ring 102, and the drive edge 84, the drive pins 122, 120 and the drive edge 84 can rotate along the yoke ring 102 in the rotational direction 107. In this way, the drive plate 82 can rotate in the rotational direction 107, and the drive handle 20 can also rotate in the direction 107.

[0073] like Figure 17 As shown, due to the positioning of the first ratchet teeth 144 and the spring bias applied by the spring 145 on the ratchet pawl 140, the ratchet pawl 140 can also produce a ratcheting effect on the gear teeth 132 when the drive plate 82, the body 80 and the ratchet pawl 140 are rotated in the direction 107. In this regard, Figure 17 Provided Figure 16, another cross-sectional front view at a depth of the head 12 and ratchet mechanism components of the ratchet wrench 10 in the illustrated configuration, illustrating the positioning of the ratchet pawl 140 within the side pawl cavity 141 and the positioning of the selector member 150 within the side selector member cavity 151. As shown, the ratchet pawl control member 143 (which may be spring-loaded by a ratchet pawl spring 145) is positioned within the ratchet pawl control recess 148 to force the ratchet pawl 140 into a position in which the first ratchet teeth 144 physically engage the gear teeth 132, such that the ratchet pawl 140 performs a ratcheting function relative to rotation of the head 12 and gear teeth 132 in direction 107, but rotation of the ratchet pawl 140 in direction 109 prevents relative rotation of the ratchet pawl 140 (and therefore the body 80). Additionally, the second ratchet teeth 146 do not engage the gear teeth 132. The ratcheting function resulting from rotation of the body 80 in direction 107 is achieved by pivoting or rocking the pawl 140 about the pawl pin 142 through a small angle, such pivoting or rocking being caused by the spring action of the pawl control member 143 and the orientation of the engaging surfaces / walls of the pawl control recess 148. Additionally, the selector control member 153 (which may be spring loaded by a selector spring 155) is positioned within the selector control recess 158 to force the selector member 150 into a position in which the control drive pin 122 is positioned closer to the counterclockwise narrowing left end of the corresponding annular segment region 85 as viewed from the axis 25, as shown. Figure 16 shown.

[0074] Reference Figure 16 As the yoke 100 and yoke ring 102 reciprocate and rotate rearwardly in the rotational direction 109, the drive pins 122, 120 are pushed toward the wider central portion of the annular segment 85 due to their positions and are therefore not compressed. Due to the relative reduction in frictional forces associated with the drive pins 122, 120 and the inner surface of the yoke ring 102 and the drive edge 84, and the engagement between the first ratchet teeth 144 and the gear teeth 132 to prevent movement of the body 80 relative to the head 12, when the yoke ring 102 rotates in the direction 109, the rotation of the yoke ring 102 in the rotational direction 109 does not cause movement of the drive pins 122, 120, and thus the body 80 and the drive handle 20 do not rotate. In other words, when the yoke 100 and the yoke ring 102 rotate in direction 109, the drive pins 122, 120 and the drive edge 84 are not pushed to rotate in direction 109 because the engagement of the first ratchet teeth 144 with the gear teeth 132 allows the inner surface 104 of the yoke ring 102 to slide relative to the drive pins 122, 120.

[0075] Thus, when the ratchet wrench 10 is in the power rotation mode, the drive handle 20 rotates along with the yoke 100 in direction 107 but remains stationary when the yoke 100 is rotated in direction 109. Furthermore, in the manual rotation mode, the rotational force applied by the user to the handle 16 in direction 107 pushes the drive pins 122, 120 toward the narrow end of the annular section 85 and compresses them. Furthermore, the position of the ratchet pawl 140 causes the first ratchet teeth 144 to engage with the gear teeth 132 and prevent the drive handle 20 from rotating relative to the head 12, thereby allowing the drive handle 20 to continue rotating in direction 107 and supporting high torque in the manual rotation mode. Furthermore, in the manual rotation mode, if the handle 16 is rotated in direction 109, the drive pins 122, 120 can be pushed toward the wider center portion of the annular section 85 without being compressed, and the position of the ratchet pawl 140 allows relative ratcheting motion between the drive handle 20 and the head 12.

[0076] Figure 18 Another cross-sectional front view of the head 12 and ratchet mechanism components of the ratchet wrench 10 is provided, which is constructed similarly to the ratchet wrench 10. Figure 16 and 17 The components in the are constructed in the opposite way. In this respect, Figure 18 With the components in the positions shown, the rotational direction 107 (counterclockwise) is the fastener resting direction, while the rotational direction 109 (clockwise) is the fastener rotating direction. Operation related to the rotational direction is a function of actuation of the selector switch 40, as further described below, to move the ratchet pawl 140 and the selector member 150 to the position corresponding to the rotational direction. Figure 16 and 17 relative position.

[0077] In this regard, upon actuation of the selector switch 40, as further described below, the ratchet pawl control member 143 is displaced to urge the ratchet pawl 140 to a position where the first ratchet teeth 144 are no longer engaged with the gear teeth 132 and the second ratchet teeth 146 are now engaged with the gear teeth 132. In this manner, the ratchet pawl 140 and the body 80 are permitted to rotate relative to the head 12 in the rotational direction 107, but are not permitted to rotate relative to the head 12 in the rotational direction 109. Additionally, due to the position of the selector switch 40, movement of the selector member 150 has moved the control drive pin 122 to a position where the control drive pin 122 and the follower drive pin 120 are arranged on the right side (as viewed from the rotational axis 25) of the annular segment region 85, clockwise. In operation, the ratchet wrench 10 in this configuration is similar to the one provided above. Figure 16 and Figure 17 The described operation, however in the opposite direction of rotation.

[0078] Now refer to Figure 19According to some exemplary embodiments, a selector switch 40 is shown with a selection component of the ratchet wrench 10. The selector switch 40 may include a switch interface 41, a selector cylinder 42, and a ratchet pawl spring 46. In this regard, the selector switch 40 may be used to switch the ratchet wrench 10 between a forward rotation mode and a reverse rotation mode, as well as to lock and unlock the ratchet pawl of the drive handle 20.

[0079] The switch interface 41 can be formed as a plate with an extended feature, for example, that allows the user to rotate the selector switch 40. In this regard, rotation of the selector switch 40 in a first direction can place the ratchet wrench 10 in a forward rotation mode (e.g., Figure 16 and 17 ), while rotation of the selector switch 40 in the opposite second direction may place the ratchet wrench 10 in a reverse rotation mode (e.g., as Figure 18 shown).

[0080] In this regard, the selector cylinder 42, which may extend from the switch interface 41, may include a ratchet pawl control cavity 43 and a selector control cavity 53. The ratchet pawl control cavity 43 may be configured to accommodate a ratchet pawl spring 145 (not shown) and a ratchet pawl control member 143. The ratchet pawl spring 145 may be located in the ratchet pawl control cavity 43, and the ratchet pawl control member 143 (which may be formed as a cylindrical cover) may be disposed on the ratchet pawl spring 145 such that the ratchet pawl control member 143 extends from the selector cylinder 42. The selector control cavity 53 may be disposed on a side of the selector cylinder 42 opposite the ratchet pawl control cavity 43 and offset from the ratchet pawl control cavity 43. Similarly, the selector control cavity 53 may be configured to accommodate a selector spring 155 (not shown) and the selector control member 153. A selector spring 155 may be located in the selector control cavity 53 , and a selector control member 153 (which may be formed as a cylindrical cover) may be disposed over the selector spring 155 such that the selector control member 153 also extends from the selector cylinder 42 .

[0081] As described above, the selector cylinder 42 can be received in the rear cavity of the body 80. The body 80 can also include an opening in each of the side ratchet pawl cavity 141 and the side selector cavity 151, through which the ratchet pawl control member 143 and the selector control member 153 can respectively engage with the ratchet pawl control recess 148 of the ratchet pawl 140 and the selector control recess 158 of the selector member 150. In this way, the selector switch 40 can be rotated within the body 80 to simultaneously switch between the forward rotation mode (e.g., Figure 16 and 17 ) and reverse rotation modes (e.g. Figure 18 140 and the selector member 150 are moved between corresponding positions (as shown).

[0082] In this regard, Figure 20 A perspective view of the ratchet pawl 140 and selector member 150 is shown isolated from the body 80 and selector switch 40. Figure 20 As shown, the pawl spring 145 and the pawl control member 143 are offset from the selector spring 155 and the selector control member 153. Furthermore, the engagement between the pawl control member 143 and the pawl 140, and between the selector control member 153 and the selector member 150, is also shown. Furthermore, as described above, the selector member 150 can engage with the control drive pin 122 via the control drive pin receiving portion 154. Thus, through movement of the selector control member 153, via rotation of the selector switch 40, the selector member 150 can pivot about the selector pin 152, thereby moving the control drive pin 122 and, therefore, the pin ring 110 with the follower drive pin 120. According to some example embodiments, the selector member 150 can thus be configured to pivot between a first selector member position, wherein in the first selector member position, the control drive pin 122 is positioned adjacent to the first end of the corresponding drive edge 84, and a second selector member position, wherein in the second selector member position, the control drive pin 122 is positioned adjacent to the second end of the corresponding drive edge 84.

[0083] Refer again Figure 19 The selector cylinder 42 may also include a detent cavity 48 that includes an upper locked level and a lower unlocked level. In this regard, the detent bearing 22 may be configured to remain engaged within the detent bearing opening 23 in the body 80 as described above. However, the selector switch 40 may be pressed into the rear cavity of the body 80 against the bias of the detent spring 46, also disposed in the rear cavity of the body 80. Moving the selector switch 40 into the body 80 may cause the lower unlocked level of the detent cavity to move behind the detent bearing 22, allowing the detent bearing 22 to retract into the body 80. When the detent bearing 22 is in the retracted position, a fastening member (e.g., a sleeve) with a detent lock slot may be removed from the drive handle 20. Upon release of the thrust on the selector switch 40, the detent bearing 22 may slide up to the upper locked level of the detent cavity 48 and lock into the extended position.

[0084] In addition, refer to Figure 21 , a portion of the internal components of the handle 16 is shown without the outer housing of the handle 16. In this regard, the motor operating button 30 can be disposed above the motor 60. As described above, the motor operating button 30 can be operably coupled to a button extension 32 disposed adjacent the motor 60. The button extension 32 can be an elongated member disposed between the motor 60 and the outer housing of the handle 16.

[0085] The motor 60 is operably coupled to the drive shaft 62 such that the mechanical interface is disposed on the upper side of the motor 60. Additionally, electrical contacts and other electrical components (e.g., the electronic circuit 70) may be disposed below the motor 60. In this regard, the button extension 32 may allow the motor operating button 30 to be disposed above the motor 60 while actuating the switch 36 below the motor 60 via the button extension 32 and the leaf spring 34 operably coupled to the button extension 32. Additionally, an electrical interface for connecting the battery 19 may also be disposed below the motor 60.

[0086] As described above, the actuation movement of the motor operating button 30 can occur in the direction of arrow 33. In this regard, the downward and upward movement of the motor operating button 30 and the button extension 32 can occur parallel to the rotational axis 45 of the drive shaft 62. By moving the motor operating button 30 in the upward and downward parallel directions, inadvertent depression of the motor operating button 30 relative to, for example, a button that operates in a direction perpendicular to the rotational axis 45 of the drive shaft 62 can be avoided.

[0087] Thus, according to some exemplary embodiments, an exemplary ratchet wrench assembly is provided. The exemplary ratchet wrench assembly may include a head, a ratchet gear, a yoke, at least one drive pin, a body, and a ratchet pawl. The ratchet gear may be disposed within the head and may include gear teeth. The yoke may be disposed within the head and configured to reciprocate about a rotational axis to rotate a fastener. The yoke may include a yoke ring. The body may include at least one drive edge and a fastener driving member. A first drive edge of the at least one drive edge may engage with a first drive pin of the at least one drive pin, such that reciprocating motion of the yoke causes the body and the fastener driving member to rotate about the rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge. The ratchet pawl may include a first ratchet tooth. The first ratchet tooth may be configured to engage with the gear teeth of the ratchet gear to allow movement of the body in a first rotational direction relative to the head, and to engage with the gear teeth to prevent movement of the body in a second rotational direction relative to the head. The second rotational direction may be opposite to the first rotational direction.

[0088] According to some exemplary embodiments, the yoke ring may have a substantially smooth inner surface. Additionally or alternatively, the at least one drive edge may include three drive edges oriented in a substantially triangular shape. Additionally or alternatively, each drive edge may be substantially linear or substantially arcuate. Additionally or alternatively, a first drive pin may be disposed within a drive pin cavity shaped as an annular segment formed by the inner surface of the yoke ring and the first drive edge of the body. Additionally or alternatively, the first drive pin may be positioned so as to be in a compressed state between the inner surface of the yoke ring and the first drive edge so as to cause the body to rotate with the yoke when the yoke rotates in a first rotational direction, and the first drive pin may be positioned so as to be free of compression between the inner surface of the yoke ring and the first drive edge when the yoke rotates in a second rotational direction, such that rotation of the yoke in the second rotational direction does not cause rotation of the body. Additionally or alternatively, a ratchet may be formed on the inner surface of the cavity in the head so that the gear teeth extend toward the axis of rotation. Furthermore, the ratchet pawl may be pivotally secured to the body. Additionally or alternatively, the yoke may include a drive bushing accommodating portion. The ratchet wrench assembly may additionally or alternatively further include a motor assembly. The motor assembly may include a motor configured to generate a rotational motion around a motor drive axis (e.g., axis 45), and a drive bushing configured to circulate around the motor drive shaft. The drive bushing may be arranged in the drive bushing accommodating portion of the yoke. The circular orbital motion of the drive bushing caused by the rotational motion generated by the motor may be converted into a reciprocating motion of the yoke around the axis of rotation of the ratchet wrench. Additionally or alternatively, the ratchet pawl may include a second ratchet tooth, which is arranged on the front side of the ratchet pawl opposite to the first ratchet tooth. The ratchet wrench assembly may also include a selector switch, which is configured to control the ratchet direction of the ratchet wrench assembly. The selector switch may be configured to pivot the ratchet pawl between a first ratchet pawl position and a second ratchet pawl position, wherein, in the first ratchet pawl position, the first ratchet teeth engage with the gear teeth and the second ratchet teeth do not engage with the gear teeth, and in the second ratchet pawl position, the second ratchet teeth engage with the gear teeth and the first ratchet teeth do not engage with the gear teeth. Additionally or alternatively, the selector switch may also be configured to simultaneously control the pivoting of the selector member and the pivoting of the ratchet pawl. In this regard, the selector member may be pivotally secured to the body and pivotally secured to the first drive pin. Additionally or alternatively, the selector member may be configured to pivot between a first selector member position and a second selector member position, wherein, in the first selector member position, the first drive pin is positioned adjacent to the first end of the first drive edge, and in the second selector member position, the first drive pin is positioned adjacent to the second end of the first drive edge.

[0089] According to some exemplary embodiments, another exemplary ratchet wrench assembly is provided. The exemplary ratchet wrench assembly may include a head, a ratchet gear, a yoke, a motor assembly, at least one drive pin, a body, and a ratchet pawl. The ratchet gear may be disposed within the head and may include gear teeth. The yoke may be disposed within the head and configured to reciprocate about a rotational axis to rotate a fastener. The yoke may include a yoke ring. The motor assembly may be battery-powered and may include a motor configured to be operably coupled to the yoke to generate reciprocating motion of the yoke about the rotational axis in response to rotational motion of the motor shaft. The body may include at least one drive edge and a fastener driving member. A first drive edge of the at least one drive edge may engage with a first drive pin of the at least one drive pin, such that reciprocating motion of the yoke may cause the body and the fastener driving member to rotate about the rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge. The ratchet pawl may include first ratchet teeth. The first ratchet teeth may be configured to engage gear teeth of the ratchet gear to allow movement of the body relative to the head in a first rotational direction and to engage gear teeth to prevent movement of the body relative to the head in a second rotational direction. The second rotational direction may be opposite to the first rotational direction.

[0090] Additionally or alternatively, the ratchet wrench assembly may further comprise an electronic circuit configured to monitor the current of the motor and to interrupt the current to the motor in response to the current of the motor exceeding a threshold current. Additionally or alternatively, the motor operating button may be configured to control the operation of the motor such that movement of the motor operating button during actuation occurs in a direction parallel to the axis of rotation of the motor drive shaft. According to some exemplary embodiments, the yoke ring may have a substantially smooth inner surface. Additionally or alternatively, the at least one drive edge may comprise three drive edges oriented in a substantially triangular shape. Additionally or alternatively, each drive edge may be substantially linear or substantially arcuate. Additionally or alternatively, the first drive pin may be disposed in a drive pin cavity shaped as an annular segment formed by the inner surface of the yoke ring and the first drive edge of the body. Additionally or alternatively, the first drive pin can be positioned in a compressed state between the inner surface of the yoke ring and the first drive edge so that the body rotates with the yoke when the yoke rotates in a first rotational direction, and the first drive pin can be positioned in a non-compressed state between the inner surface of the yoke ring and the first drive edge when the yoke rotates in a second rotational direction, so that the rotation of the yoke in the second rotational direction does not cause the body to rotate. Additionally or alternatively, a ratchet gear can be formed on the inner surface of the cavity in the head so that the gear teeth extend toward the axis of rotation. In addition, the ratchet pawl can be pivotally fixed to the body. Additionally or alternatively, the yoke can include a drive bushing accommodating portion. The ratchet wrench assembly can additionally or alternatively further include a motor assembly. The motor assembly can include a motor configured to generate rotational motion around a motor drive axis (e.g., axis 45), and a drive bushing configured to circulate around the motor drive shaft. The drive bushing can be arranged in the drive bushing accommodating portion of the yoke. The circular orbital motion of the drive bushing caused by the rotational motion generated by the motor can be converted into a reciprocating motion of the yoke around the rotation axis of the ratchet wrench. Additionally or alternatively, the ratchet pawl may include a second ratchet tooth, which is arranged on the front side of the ratchet pawl opposite to the first ratchet tooth. The ratchet wrench assembly may also include a selector switch, which is configured to control the ratchet direction of the ratchet wrench assembly. The selector switch can be configured to pivot the ratchet pawl between a first ratchet pawl position and a second ratchet pawl position, wherein, in the first ratchet pawl position, the first ratchet tooth engages with the gear teeth and the second ratchet tooth does not engage with the gear teeth, and in the second ratchet pawl position, the second ratchet tooth engages with the gear teeth and the first ratchet tooth does not engage with the gear teeth. Additionally or alternatively, the selector switch can also be configured to simultaneously control the pivoting of the selector member and the pivoting of the ratchet pawl. In this regard, the selector member can be pivotally fixed to the body and pivotally fixed to the first drive pin.Additionally or alternatively, the selector member may be configured to pivot between a first selector member position wherein, in the first selector member position, the first drive pin is positioned adjacent to the first end of the first drive edge, and a second selector member position wherein, in the second selector member position, the first drive pin is positioned adjacent to the second end of the first drive edge.

[0091] Having benefited from the teachings presented in the foregoing description and the associated drawings, those skilled in the art will recognize numerous modifications and other embodiments of the chuck described herein. Therefore, it should be understood that the chuck is not limited to the specific embodiments disclosed, and that modifications and other embodiments are intended to be included within the scope of the appended claims. Furthermore, while the foregoing description and the associated drawings describe exemplary embodiments in the context of certain exemplary combinations of elements and / or functions, it should be understood that different combinations of elements and / or functions may be provided through alternative embodiments without departing from the scope of the appended claims. In this regard, for example, combinations of elements and / or functions different from those explicitly described above are also contemplated as being possible in some of the appended claims. Where advantages, benefits, or solutions to problems are described herein, it should be understood that these advantages, benefits, and / or solutions may apply to some example embodiments, but not necessarily to all example embodiments. Therefore, any advantages, benefits, or solutions described herein should not be considered critical, essential, or necessary to all embodiments or the embodiments claimed herein. Although specific terms are used herein, they are used in a general and descriptive sense only and not for purposes of limitation.

Claims

1. A ratchet wrench assembly comprising: head; a ratchet gear disposed within the head and comprising gear teeth; a yoke disposed within the head and configured to reciprocate about a rotational axis to facilitate rotating the fastener, the yoke comprising a yoke ring; at least one drive pin; a body comprising at least one drive edge and a fastener driving member, wherein a first drive edge of the at least one drive edge engages a first drive pin of the at least one drive pin such that reciprocating motion of the yoke causes rotation of the body and the fastener driving member about a rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge, the first drive edge being linear for an entire length of the first drive edge; as well as a ratchet pawl comprising first ratchet teeth configured to engage the gear teeth of the ratchet gear to allow movement of the body relative to the head in a first rotational direction, and to engage the gear teeth to prevent movement of the body relative to the head in a second rotational direction, the second rotational direction being opposite to the first rotational direction.

2. The ratchet wrench assembly according to claim 1, wherein: The yoke ring has a substantially smooth inner surface.

3. The ratchet wrench assembly according to claim 1, wherein: The at least one drive pin includes a plurality of drive pins including the first drive pin, and the at least one drive edge includes a plurality of drive edges including the first drive edge.

4. The ratchet wrench assembly according to claim 1, wherein: The first drive pin is disposed in a drive pin cavity shaped as an annular segment formed by the inner surface of the yoke ring and the first drive edge of the body.

5. The ratchet wrench assembly according to claim 4, wherein: the first drive pin being positioned in a compressed state between an inner surface of the yoke ring and the first drive edge so as to cause the body to rotate with the yoke when the yoke rotates in the first rotational direction; as well as Wherein, the first drive pin is positioned to be in a non-compressed state between the inner surface of the yoke ring and the first drive edge when the yoke rotates along the second rotation direction, so that the rotation of the yoke along the second rotation direction does not cause the rotation of the body.

6. The ratchet wrench assembly according to claim 1, wherein: The ratchet gear is formed on an inner surface of a cavity in the head such that the gear teeth extend toward the rotation axis, and wherein the ratchet pawl is pivotally fixed to the body.

7. The ratchet wrench assembly according to claim 1, wherein: The yoke includes a drive bushing receiving portion; Wherein, the ratchet wrench assembly further includes a motor assembly, and the motor assembly includes: a motor configured to generate rotational motion about a motor drive axis, and a drive bushing configured to perform circular orbital motion about the motor drive axis, the drive bushing being disposed within the drive bushing receiving portion of the yoke; Therein, the circular orbital motion of the drive bushing caused by the rotational motion generated by the motor is converted into a reciprocating motion of the yoke around the ratchet wrench rotation axis.

8. The ratchet wrench assembly according to claim 1, wherein: the ratchet pawl including a second ratchet tooth disposed on a forward-facing side of the ratchet pawl opposite the first ratchet tooth; and The ratchet wrench assembly further includes a selector switch configured to control a ratchet direction of the ratchet wrench assembly, the selector switch configured to cause the ratchet pawl to pivot between a first ratchet pawl position in which the first ratchet teeth engage with the gear teeth and the second ratchet teeth do not engage with the gear teeth, and a second ratchet pawl position in which the second ratchet teeth engage with the gear teeth and the first ratchet teeth do not engage with the gear teeth.

9. A ratchet wrench assembly comprising: head; a ratchet gear disposed within the head and comprising gear teeth; a yoke disposed within the head and configured to reciprocate about a rotational axis to facilitate rotating the fastener, the yoke comprising a yoke ring; at least one drive pin; a body comprising at least one drive edge and a fastener driving member, wherein a first drive edge of the at least one drive edge engages a first drive pin of the at least one drive pin such that reciprocating motion of the yoke causes rotation of the body and the fastener driving member about a rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge; as well as a ratchet pawl including first ratchet teeth configured to engage the gear teeth of the ratchet gear to allow movement of the body relative to the head in a first rotational direction and to engage the gear teeth to prevent movement of the body relative to the head in a second rotational direction, the second rotational direction being opposite to the first rotational direction, wherein the ratchet pawl includes second ratchet teeth disposed on a forward-facing side of the ratchet pawl opposite the first ratchet teeth; and wherein the ratchet wrench assembly further comprises a selector switch configured to control a ratchet direction of the ratchet wrench assembly, the selector switch being configured to pivot the ratchet pawl between a first ratchet pawl position, wherein in the first ratchet pawl position the first ratchet teeth are engaged with the gear teeth and the second ratchet teeth are not engaged with the gear teeth, and a second ratchet pawl position, wherein the second ratchet teeth are engaged with the gear teeth and the first ratchet teeth are not engaged with the gear teeth, wherein the selector switch is further configured to simultaneously control pivoting of a selector member and movement of the ratchet pawl, the selector member being pivotally secured to the body and pivotally secured to the first drive pin; wherein the selector member is configured to pivot between a first selector member position wherein the first drive pin is positioned adjacent to a first end of a first drive edge and a second selector member position wherein the first drive pin is positioned adjacent to a second end of the first drive edge.

10. A ratchet wrench assembly comprising: head; a ratchet gear disposed within the head and comprising gear teeth; a yoke disposed within the head and configured to reciprocate about a rotational axis to facilitate rotating the fastener, the yoke comprising a yoke ring; a motor assembly powered by a battery, the motor assembly including a motor configured to be operably coupled to the yoke to produce reciprocating motion of the yoke about a rotational axis in response to rotational motion of a shaft of the motor, at least one drive pin; a body comprising at least one drive edge and a fastener driving member, wherein a first drive edge of the at least one drive edge engages a first drive pin of the at least one drive pin such that reciprocating motion of the yoke causes rotation of the body and the fastener driving member about a rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge, the first drive edge being linear for an entire length of the first drive edge; as well as a ratchet pawl comprising first ratchet teeth configured to engage the gear teeth of the ratchet gear to allow movement of the body relative to the head in a first rotational direction, and to engage the gear teeth to prevent movement of the body relative to the head in a second rotational direction, the second rotational direction being opposite to the first rotational direction. 11 . The ratchet wrench assembly of claim 10 , further comprising an electronic circuit configured to monitor current flow to the motor and interrupt current flow to the motor in response to the motor current flow exceeding a threshold current flow.

12. The ratchet wrench assembly of claim 10, further comprising a motor operating button configured to control operation of the motor, wherein movement of the motor operating button during actuation occurs in a direction parallel to the rotational axis of the motor drive shaft.

13. The ratchet wrench assembly according to claim 10, wherein: The yoke ring has a substantially smooth inner surface.

14. The ratchet wrench assembly according to claim 10, wherein: Each drive edge is substantially linear, and wherein the first drive pin is disposed within a drive pin cavity shaped as an annular segment formed by an inner surface of the yoke ring and the first drive edge of the body.

15. The ratchet wrench assembly of claim 14, wherein: the first drive pin being positioned in a compressed state between an inner surface of the yoke ring and the first drive edge so as to cause the body to rotate with the yoke when the yoke rotates in the first rotational direction; as well as Wherein, the first drive pin is positioned to be in a non-compressed state between the inner surface of the yoke ring and the first drive edge when the yoke rotates along the second rotation direction, so that the rotation of the yoke along the second rotation direction does not cause the rotation of the body.

16. The ratchet wrench assembly of claim 10, wherein: The ratchet gear is formed on an inner surface of a cavity in the head such that the gear teeth extend toward the rotation axis, and wherein the ratchet pawl is pivotally fixed to the body.

17. The ratchet wrench assembly of claim 10, wherein: The yoke includes a drive bushing receiving portion; and The motor assembly includes a drive bushing configured to perform circular orbital motion around a motor axis, and the drive bushing is disposed within the drive bushing accommodating portion of the yoke.

18. The ratchet wrench assembly of claim 10, wherein: the ratchet pawl including a second ratchet tooth disposed on a forward-facing side of the ratchet pawl opposite the first ratchet tooth; as well as The ratchet wrench assembly further comprises a selector switch configured to control a ratchet direction of the ratchet wrench assembly, the selector switch being configured to pivot the ratchet pawl between a first ratchet pawl position and a second ratchet pawl position, wherein in the first ratchet pawl position the first ratchet teeth engage with the gear teeth and the second ratchet teeth do not engage with the gear teeth, and in the second ratchet pawl position the second ratchet teeth engage with the gear teeth and the first ratchet teeth do not engage with the gear teeth.

19. A ratchet wrench assembly comprising: head; a ratchet gear disposed within the head and comprising gear teeth; a yoke disposed within the head and configured to reciprocate about a rotational axis to facilitate rotating the fastener, the yoke comprising a yoke ring; a motor assembly powered by a battery, the motor assembly including a motor configured to be operably coupled to the yoke to produce reciprocating motion of the yoke about a rotational axis in response to rotational motion of a shaft of the motor, at least one drive pin; a body comprising at least one drive edge and a fastener driving member, wherein a first drive edge of the at least one drive edge engages a first drive pin of the at least one drive pin such that reciprocating motion of the yoke causes rotation of the body and the fastener driving member about a rotational axis via engagement of the first drive pin between an inner surface of the yoke ring and the first drive edge, the first drive edge being linear for an entire length of the first drive edge; as well as a ratchet pawl including first ratchet teeth configured to engage the gear teeth of the ratchet gear to allow movement of the body relative to the head in a first rotational direction and to engage the gear teeth to prevent movement of the body relative to the head in a second rotational direction, the second rotational direction being opposite to the first rotational direction, wherein the ratchet pawl includes second ratchet teeth disposed on a forward-facing side of the ratchet pawl opposite the first ratchet teeth; and wherein the ratchet wrench assembly further comprises a selector switch configured to control a ratchet direction of the ratchet wrench assembly, the selector switch being configured to pivot the ratchet pawl between a first ratchet pawl position, wherein in the first ratchet pawl position the first ratchet teeth are engaged with the gear teeth and the second ratchet teeth are not engaged with the gear teeth, and a second ratchet pawl position, wherein the second ratchet teeth are engaged with the gear teeth and the first ratchet teeth are not engaged with the gear teeth, wherein the selector switch is further configured to simultaneously control pivoting of a selector member and movement of the ratchet pawl, the selector member pivotably securing the body and pivotably securing the first drive pin; wherein the selector member is configured to pivot between a first selector member position wherein the first drive pin is positioned adjacent to a first end of a first drive edge and a second selector member position wherein the first drive pin is positioned adjacent to a second end of the first drive edge.

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