Adjustable size open-end wrench

Abstract

Adjustable size open-end wrench, comprehensive a handle (1) having at one end a drive head (3) forming a main hole (33) which is through and provided with an opening (34), and wherein the wall of the main hole (33) is provided with at least one recessed chamber (35) in which a pawl (5) is arranged; and a ratchet wheel (4) mounted in the main hole (33) and comprising a regular polygonal central hole (40), a passage (41) adapted to the opening (34), external teeth (42) arranged on the outer circumference, and knobs (43) that are rotated by the ratchet wheel (4), wherein the wall of the central hole (40) is provided with a radial annular locking groove (45) in which a C-shaped ring (46) is arranged that tends to project elastically into the central hole (40), wherein the pawl (5) is provided with teeth (53) that can engage in the external teeth (42), and wherein the rear of the pawl (5) is pressed by an elastic element (6) such that the teeth (53) are held in engagement with the external teeth (42) so that the handle (1) and the ratchet wheel (4) can be rotated together in one direction. .

Description

Technical field

[0001] The invention relates to a variable-size open-end wrench which is suitable for screw elements of different sizes by means of sockets of different sizes. State of the art

[0002] As known from TW M405338, a C-shaped ratchet wheel has a regular hexagonal central hole with an opening. The central hole is used directly for inserting screw elements (such as bolts or nuts) to tighten or loosen them. Tightening or loosening screw elements of different sizes requires the manufacture of correspondingly sized ratchet wrenches, which not only incurs high acquisition costs but also takes up space and is impractical to carry, thus necessitating a new design. Object of the invention

[0003] The object of the invention is to provide a variable-size open-end wrench that can overcome the aforementioned disadvantages.

[0004] The open-end wrench comprises a C-shaped ratchet wheel having a regular polygonal central hole, the wall of which is provided with a radial annular locking groove in which a C-shaped ring is arranged which tends to elastically protrude into the central hole to exchange and position multiple first sockets.

[0005] The first socket has a coaxial first drive hole for inserting a screw element, a first polygonal body for insertion into the central hole and a first opening adapted to the passage, wherein the first polygonal body is radially provided at the edges with a first groove into which the C-shaped ring can necessarily engage and be pulled out. Brief description of the drawings Fig. 1 an exploded view of the invention, Fig. 2 a perspective view in the separated state with the plug-in sleeves of the invention, Fig. 3 a perspective drawing according to Fig. 2, Fig. 4 a sectional view according to Fig. 3, Fig. 5 a cross-sectional view during the extraction of the cartridge cases of the invention, Fig. 6 a representation of a further embodiment of the invention. Ways to implement the invention

[0006] As in the Fig. As shown in 1 to 5, the invention comprises: a handle (1) being provided at one end with a female joint section (11) and at the other end with an auxiliary head (2), the auxiliary head (2) having a forward jaw (21) and a reverse jaw (22) extending outwards, such that the forward jaw (21) and the reverse jaw (22) form a regularly polygonal auxiliary hole (23) extending through the top and bottom sides and an opening (24) connecting the inside and outside of the auxiliary hole (23), wherein a radial annular fitting groove (25) is provided on the wall of the auxiliary hole (23), and a C-shaped fitting ring (26) is arranged in the groove (25); as shown in Fig. As shown in Figure 2, the fitting ring (26) has a tendency to extend elastically into the auxiliary hole (23); a drive head (3) having a male joint section (31) that fits the female joint section (11) and is connected to it by a joint axis (32) so that the drive head (3) can be rotatably mounted on the handle (1) about the joint axis (32) to allow angular adjustment, wherein the drive head (3) has a main hole (33) that extends through the top and bottom sides and is provided with an opening (34) that connects the inside and outside of the main hole (33) so that the drive head (3) is C-shaped, wherein the wall of the main hole (33) is provided with at least one recessed chamber (35) and at least one radial annular groove (36), and wherein the annular groove (36) is connected to the chamber (35); a C-shaped ratchet wheel (4) mounted in the main hole (33) and having a regular polygonal central hole (40) extending through the top and bottom, a passage (41) adapted to the opening (34), and external teeth (42) arranged on the outer circumference, wherein the ratchet wheel (4) is also provided with mounting grooves (44) for rotary knobs (43) provided on the top and bottom of the outer circumference, such that the upper rotary knob (43) is located on the top of the drive head (3) and the lower rotary knob (43) is located on the underside of the drive head (3) to restrict the ratchet wheel (4) in the main hole (33) and to facilitate the operation of the ratchet wheel (4) by rotating the ratchet wheel (4) around the central hole (40) to align the passage (41) with the opening (34) so ​​that the tube can enter and exit according to the patent described above.wherein the wall of the central hole (40) is provided with a radial annular locking groove (45) in which a C-shaped ring (46) is arranged; as in , Fig. As shown in Figure 2, the C-shaped ring (46) has a tendency to extend elastically into the central hole (40); a pawl (5) arranged in the chamber (35) and provided with a guide groove (51) connected to the annular groove (36) to receive a C-shaped positioning ring (52) and thus limit the pawl (5) in the chamber (35) without affecting the rotation of the ratchet wheel (4), wherein the front of the pawl (5) is provided with teeth (53) that can engage with the external teeth (42), and wherein the rear of the pawl (5) is pressed by an elastic element (6) so that the teeth (53) are kept in engagement with the external teeth (42), so that the handle (1) and the ratchet wheel (4) can be rotated together in one direction by applying force. a first socket sleeve (7) formed by a flat socket sleeve and comprising a coaxial first drive hole (71) for inserting a screw element, a first polygonal body (72) for insertion into the central hole (40), and a first opening (73) adapted to the passage (41), wherein the first polygonal body (72) is provided radially at its edges with a first groove (74) into which the C-shaped ring (46) can necessarily engage and be withdrawn, wherein the first polygonal body (72) is provided radially at its edges below the first groove (74) with a first buffer groove (75) which is shallower than the first groove (74), wherein, as in Fig. Figure 5 shows that after the first socket (7) is forcefully pulled upwards and the first groove (74) is separated from the C-shaped ring (46), the first buffer groove (75) can continue to generate a braking effect with the C-shaped ring (46) to reduce the speed at which the first socket (7) is detached from the central hole (40) to increase operational safety; the feature of the present invention is that a set of several first sockets (7) with different sized first drive holes (71) can be formed to meet the exchange and positioning requirements of the central hole (40) and the C-shaped ring (46), thus enabling flexible adaptation to different sizes of screw elements, thereby eliminating the shortcomings of the previous patent and achieving the advantages of low acquisition costs, small footprint, and easy transport; and a second socket sleeve (8) formed by a tall socket sleeve and comprising a coaxial second drive hole (81) for inserting a screw element, a second polygonal body (82) for insertion into the auxiliary hole (23), and a second opening (83) adapted to the opening (24), wherein the second polygonal body (82) is provided radially at its edges with a second groove (84) into which the fitting ring (26) can necessarily engage and be withdrawn, wherein the second polygonal body (82) is provided radially at its edges below the second groove (84) with a second buffer groove (85) which is shallower than the second groove (84), wherein, as in Fig. Figure 5 shows that after the second plug-in sleeve (8) is pulled upwards with force and the second groove (84) is separated from the locking ring (26), the second buffer groove (85) can continue to generate a braking effect with the fitting ring (26); a set of several second plug-in sleeves (8) with different sized second drive holes (81) can be formed to meet the exchange and positioning requirements of the auxiliary hole (23) and the locking ring (26), thus increasing the scope of application of the invention.

[0007] As in Fig. As shown in Figure 6, the first socket (7) can be formed by a tall socket and the second socket (8) by a flat socket. This embodiment illustrates that the first socket (7) and the second socket (8) can be designed as different socket types or in any combination, depending on the application environment. Reference symbol list 1 handle 11 female joint segment 2 Auxiliary head 21 Forward cheek 22 reverse jaw 23 Auxiliary hole 24-hour opening 25 Fit groove 26 Passring 3 Drive head 31 male joint segment 32 Joint axle 33 Main Hole 34 Opening 35th Chamber 36 Ring groove 4 ratchet wheel 40 Central Hole 41st round 42 External teeth 43 Rotary knob 44 Mounting groove 45 Locking groove 46 C-shaped ring 5 locking pawl 51 Guide groove 52 Positioning ring 53 teeth 6 elastic element 7 first socket 71 first drive hole 72 first polygonal body 73 first opening 74 first groove 75 first buffer groove 8 second socket 81 second drive hole 82 second polygonal body 83 second opening 84 second groove 85 second buffer groove

Claims

[1] Variable size open-end wrench comprising a handle (1) having at one end a drive head (3) forming a main hole (33) which is through and provided with an opening (34), and wherein the wall of the main hole (33) is provided with at least one recessed chamber (35) in which a pawl (5) is arranged; and a ratchet wheel (4) mounted in the main hole (33) and comprising a regular polygonal central hole (40), a passage (41) adapted to the opening (34), external teeth (42) arranged on the outer circumference, and knobs (43) that are rotated by the ratchet wheel (4), wherein the wall of the central hole (40) is provided with a radial annular locking groove (45) in which a C-shaped ring (46) is arranged that tends to project elastically into the central hole (40), wherein the pawl (5) is provided with teeth (53) that can engage in the external teeth (42), and wherein the rear of the pawl (5) is pressed by an elastic element (6) such that the teeth (53) are held in engagement with the external teeth (42) so that the handle (1) and the ratchet wheel (4) can be rotated together in one direction. . [2] Variable size open-end wrench according to claim 1, characterized bya first socket (7) having a coaxial first drive hole (71) for inserting a screw element, a first polygonal body (72) for insertion into the central hole (40) and a first opening (73) adapted to the passage (41), wherein the first polygonal body (72) is provided radially at its edges with a first groove (74) into which the C-shaped ring (46) can necessarily engage and be pulled out. [3] Variable size open-end wrench according to claim 2, characterized by , that the first polygonal body (72) is provided radially at the edges below the first groove (74) with a first buffer groove (75) which is shallower than the first groove (74). [4] Variable size open-end wrench according to claim 1, 2 or 3, characterized by, that the handle (1) has at one end a female joint section (11) and the drive head (3) has a male joint section (31) which is connected to the handle by a joint axis (32). [5] Variable size open-end wrench according to claim 1, 2 or 3, characterized by , that the handle (1) is provided at the other end with an auxiliary head (2), wherein the auxiliary head (2) has a forward jaw (21) and a reverse jaw (22) extending outwards, such that the forward jaw (21) and the reverse jaw (22) form a regularly polygonal auxiliary hole (23) passing through the upper and lower sides and an opening (24) connecting the inside and outside of the auxiliary hole (23), wherein a radial annular fitting groove (25) is provided on the wall of the auxiliary hole (23), wherein a C-shaped fitting ring (26) is arranged in the groove (25), the locking ring (26) having the tendency to project elastically into the auxiliary hole (23). [6] Variable size open-end wrench according to claim 5, characterized by a second socket (8) having a coaxial second drive hole (81) for inserting a screw element, a second polygonal body (82) for insertion into the auxiliary hole (23) and a second opening (83) adapted to the opening (24), wherein the second polygonal body (82) is provided radially at its edges with a second groove (84) into which the fitting ring (26) can necessarily engage and be pulled out. [7] Variable size open-end wrench according to claim 6, characterized by , that the second polygonal body (82) is provided radially at the edges below the second groove (84) with a second buffer groove (85) which is shallower than the second groove (84).

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