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DE-102025140854-A1 - ratchet screwdriver

DE102025140854A1DE 102025140854 A1DE102025140854 A1DE 102025140854A1DE-102025140854-A1

Abstract

The invention relates to a ratchet screwdriver comprising: a handle unit (1) containing a handle part (11) and a base (12) connected to each other; a drive rod (2) rotatably arranged on the base (12); a rotating element (3) mounted on the base (12) in the axial direction (21) and capable of rotating about the drive rod (2), wherein a first positioning hole (31), two second positioning holes (32) and two pressure sections (33) are spaced apart on the inner surface facing the drive rod (2) along the circumferential direction (23), the first positioning hole (31) being located between the two second positioning holes (32); a positioning assembly (4) arranged on the drive rod (2) and capable of engaging one of the first positioning hole (31) and the two second positioning holes (32) along the radial direction (22); and a ratchet mechanism (5) comprising a ratchet ring (51) and two locking units (52), wherein the ratchet ring (51) is arranged on the inner surface of the base (12), wherein the two locking units (52) are located on two opposite sides of the drive rod (2) and can selectively engage with the ratchet ring (51), wherein each locking unit (52) comprises a drive element (53), a pawl (54), a spring (56) and a retainer (57), wherein the drive element (53) and the pawl (54) are integrally connected, wherein a part of the drive element (53) is located on the path of movement of the pressure section (33), wherein the pawl (54), the spring (56) and the retainer (57) are arranged in a straight line perpendicular to the axial direction (21), wherein several teeth (541) are provided on the side of the pawl (54) facing away from the retainer (57). are provided, wherein the spring (56) is located between the pawl (54) and holder (57) are arranged such that the several teeth (541) tend to engage in the ratchet ring (51) in the normal state, and the holder (57) is slidably in contact with the ratchet ring (51).

Inventors

  • Shui-Lai Chiang

Assignees

  • WILLIAM TOOLS CO., LTD.

Dates

Publication Date
20260513
Application Date
20251007
Priority Date
20241112

Claims (10)

  1. Ratcheting screwdriver, comprising: a handle unit (1) comprising a handle part (11) and a base (12) connected to each other; a drive rod (2) rotatably mounted on the base (12) and defining an axial direction (21), a radial direction (22), and a circumferential direction (23); a rotating element (3) mounted on the base (12) in the axial direction (21) and capable of rotating about the drive rod (2), wherein a first positioning hole (31), two second positioning holes (32), and two pressure sections (33) are spaced apart on the inner surface facing the drive rod (2) along the circumferential direction (23), the first positioning hole (31) being located between the two second positioning holes (32); a positioning assembly (4) which is arranged on the drive rod (2) and includes an elastic body (41) and a positioning element (42), wherein the elastic body (41) is located between the drive rod (2) and the positioning element (42) so that the positioning element (42) can engage along the radial direction (22) in one of the first positioning hole (31) and the two second positioning holes (32); and a ratchet mechanism (5) comprising a ratchet ring (51) and two locking units (52), wherein the ratchet ring (51) is arranged on the inner surface of the base (12), wherein the two locking units (52) are located on two opposite sides of the drive rod (2) and can selectively engage with the ratchet ring (51), wherein each locking unit (52) comprises a drive element (53), a pawl (54), a spring (56) and a retainer (57), wherein the drive element (53) and the pawl (54) are integrally connected, wherein the pawl (54) is located on the inside of the ratchet ring (51), wherein the drive element (53) projects from the ratchet ring (51) and is located on the inside of the rotating element (3), wherein a part of the drive element (53) is located on the path of movement of the pressure section (33), wherein the pawl (54), the spring (56) and the holder (57) are arranged in a straight line perpendicular to the axial direction (21), wherein several teeth (541) are provided on the side of the pawl (54) facing away from the holder (57), wherein the spring (56) is arranged between the pawl (54) and the holder (57) so that the several teeth (541) tend to engage in the ratchet ring (51) in the normal state, and wherein the holder (57) slidably rests against the ratchet ring (51), whereby, when the rotating element (3) is rotated so that the positioning element (42) engages in the first positioning hole (31), the two pressure sections (33) do not press against the drive elements (53) of the two locking units (52) and the two pawls (54) of the two locking units (52) engage simultaneously in the ratchet ring (51), wherein the handle unit (1) and the drive rod (2) is rotated in two directions simultaneously; and when the rotating element (3) is rotated so that the positioning element (42) engages in one of the two second positioning holes (32), a pressure section (33) presses against a drive element (53) along the circumferential direction (23) in the direction of the holder (57), thereby releasing the multiple teeth (541) of the pawl (54) from the ratchet ring (51), and the drive rod (2) and the handle unit (1) rotate together in one direction and freewheel in the opposite direction.
  2. ratchet screwdriver after Claim 1 , characterized in that the spring (56) is a rectangular spring.
  3. ratchet screwdriver after Claim 2 , characterized in that the opposing sides of the locking pawl (54) and the holder (57) each have a receiving recess (6) are provided with the two ends of the spring (56) being received in the receiving recess (6) of the pawl (54) and the receiving recess (6) of the holder (57).
  4. ratchet screwdriver after Claim 1 , characterized in that the height of the spring (56) in the axial direction (21) corresponds to the height of the pawl (54).
  5. ratchet screwdriver after Claim 1 , characterized in that the two sides of the drive rod (2) are each provided with a first receiving recess (24) and a second receiving recess (25) along the radial direction (22), wherein the first receiving recess (24) and the second receiving recess (25) are arranged along the axial direction (21) and are connected to each other, wherein the drive element (53) is housed in the first receiving recess (24) and the pawls (54), the spring (56) and the holder (57) are housed in the second receiving recess (25).
  6. ratchet screwdriver after Claim 5 , characterized in that the drive element (53) is spaced away from the inner wall of the first receiving recess (24).
  7. ratchet screwdriver after Claim 5 , characterized in that the end of the pawl (54) facing the holder (57) rests against the inner wall of the second receiving recess (25), wherein the side of the pawl (54) facing the inner wall of the second receiving recess (25) is gradually further away from the inner wall of the second receiving recess (25) in the direction from the holder (57) to the teeth (541).
  8. ratchet screwdriver after Claim 1 , characterized in that the holder (57) has a guide wall (58), wherein the guide wall (58) and the drive rod (2) define a movement space (59), wherein the pawl (54) rests against the guide wall (58) and is stably linearly movable within the movement space (59).
  9. ratchet screwdriver after one of the Claims 1 until 8 , characterized in that the drive element (53) partially overlaps the pawl (54), the spring (56) and the holder (57) in the axial direction (21).
  10. ratchet screwdriver after Claim 3 , characterized in that the height of the spring (56) in the axial direction (21) corresponds to the height of the pawl (54); that both sides of the drive rod (2) are each provided with a first receiving recess (24) and a second receiving recess (25) along the radial direction (22), wherein the first receiving recess (24) and the second receiving recess (25) are arranged along the axial direction (21) and are connected to each other, wherein the drive element (53) is housed in the first receiving recess (24) and the pawls (54), the spring (56) and the holder (57) are housed in the second receiving recess (25); that the drive element (53) is spaced apart from the inner wall of the first receiving recess (24); that the end of the pawl (54) facing the holder (57) rests against the inner wall of the second receiving recess (25), wherein the side of the pawl (54) facing the inner wall of the second receiving recess (25) is gradually further away from the inner wall of the second receiving recess (25) in the direction from the holder (57) to the teeth (541); that the holder (57) has a guide wall (58), wherein the guide wall (58) and the drive rod (2) define a movement space (59), wherein the pawl (54) rests against the guide wall (58) and is stably and linearly movable within the movement space (59); that the drive element (53) partially overlaps the pawl (54), the spring (56) and the holder (57) in the axial direction (21); that the end of the drive rod (2) facing away from the handle unit (1) is provided with a socket for a tool head (8); that the first positioning hole (31), the two second positioning holes (32) and the two pressure sections (33) are each located on two opposite sides of the rotary element (3); that one side of the outer circumferential wall of the drive rod (2) and the rotary element (3) is provided with several first markings (71) and the other with a second marking (72), wherein the several first markings (71) in the radial direction (22) indicate the first positioning hole (31) and the two second positioning holes (32), wherein the second marking (72) in the radial direction (22) indicates the positioning element (42), and wherein the second marking (72) can optionally be aligned with one of the first markings (71) in the axial direction (21); that a concave-convex structure (34) is provided on the outer circumferential wall of the rotating element (3); that a bolt (13) penetrates the drive rod (2) and is screwed to the base (12), the drive rod (2) being rotatable about the bolt (13); and that the holder (57) is mounted on the drive rod (2).

Description

Technical field The invention relates to a hand tool, in particular a ratchet screwdriver. State of the art A screwdriver is a tool used to turn screws. Screwdrivers come in various shapes to fit different screws. Common shapes include slotted, Phillips, hex, and star. The basic structure of a screwdriver consists of a blade inserted into a handle. The handle is turned by hand to drive the blade. Examples of such screwdrivers are described in Taiwanese patents I680841, M576090, and M524240. However, in actual use of the aforementioned screwdriver, the hand must constantly change the grip position to continuously rotate the blade in a specific direction, which makes operation impractical and inconvenient in a confined space. Therefore, it is necessary to provide a novel and advanced ratchet screwdriver to solve the aforementioned problems. Object of the invention The object of the invention is to provide a ratchet screwdriver wherein the ratchet mechanism allows forward and backward rotation by a small angle for loosening and tightening without changing the hand position, which is not only suitable for use in confined spaces but also effectively increases work efficiency. This objective is achieved by the ratchet screwdriver of the invention, which comprises: a handle unit containing a handle part and a base connected to each other; a drive rod rotatably arranged on the base and defining an axial direction, a radial direction, and a circumferential direction; a rotating element mounted on the base in the axial direction and capable of rotating about the drive rod, wherein a first positioning hole, two second positioning holes, and two pressure sections are spaced apart along the circumferential direction on the inner surface facing the drive rod, the first positioning hole being located between the two second positioning holes; a positioning assembly arranged on the drive rod comprising an elastic body and a positioning element, the elastic body being located between the drive rod and the positioning element so that the positioning element can engage in one of the first positioning holes and the two second positioning holes along the radial direction; and a ratchet mechanism comprising a ratchet ring and two locking units, wherein the ratchet ring is arranged on the inner surface of the base, wherein the two locking units are located on two opposite sides of the drive rod and can selectively engage with the ratchet ring, wherein each locking unit comprises a drive element, a pawl, a spring and a retainer, wherein the drive element and the pawl are integrally connected, wherein the pawl is located on the inside of the ratchet ring, wherein the drive element projects from the ratchet ring and is located on the inside of the rotating element, wherein part of the drive element is located on the path of movement of the pressure section, wherein the pawl, the spring and the retainer are arranged in a straight line perpendicular to the axial direction, wherein several teeth are provided on the side of the pawl facing away from the retainer, wherein the spring is arranged between the pawl and the retainer such that the several teeth tend to engage with the ratchet ring in the normal state, and wherein the retainer slidably rests against the ratchet ring. wherein, when the rotating element is turned so that the positioning element engages in the first positioning hole, the two pressure sections do not press against the drive elements of the two locking units and the two pawls of the two locking units engage simultaneously in the ratchet ring, the handle unit and the drive rod being turned in two directions simultaneously; and when the rotating element is turned so that the positioning element engages in one of the two second positioning holes, a pressure section presses against a drive element along the circumferential direction in the direction of the holder, thereby releasing the multiple teeth of the pawl from the ratchet ring, the drive rod and the handle unit rotating together in one direction and freewheeling in the opposite direction. Brief description of the drawings 1 a perspective view of an embodiment of the invention,2 an exploded view according to 1 ,3 a sectional view according to Figure 1,4 a representation of the rotary element and the drive rod of the embodiment of the Invention, wherein the positioning element is located in the first positioning hole,5 a sectional view along line AA in 4 ,6 a sectional view along line BB in 4 ,7 Illustration of the rotary element and the drive rod of the embodiment of the invention, wherein the positioning element is located in the second positioning hole,8 a sectional view along line CC in 7 ,9 a sectional view along line DD in 7 . Ways to implement the invention The following embodiments serve only to illustrate the possible implementation of this invention and are not intended to limit its scope. The term "one" or "at least one" before the nouns mentioned in the