Adjustable ratchet wrench

Abstract

The utility model provides an adjustable ratchet wrench, and belongs to the technical field of hardware tools. According to the adjustable ratchet wrench, an adjusting structure group, an inner ring adjusting ring and an outer ring adjusting ring are coaxially mounted in the center of the wrench head in an embedded manner; the adjusting structure group is formed by circumferentially connecting and combining a plurality of adjusting units, and comprises a connecting rod, an arched block and a movable rod; the inner ring adjusting ring comprises an adjusting ratchet ring and a movable ring, adjusting screws are installed at ratchet teeth of the adjusting ratchet ring in a matched mode, and movable grooves are correspondingly formed in the upper end face and the lower end face of the movable ring. The outer ring adjusting ring comprises a spiral ring and a one-way ratchet ring, an adjusting screw is installed at a groove of the spiral ring, and a fixing shaft is formed on the inner side of the one-way ratchet ring. The inner ring adjusting ring is driven to rotate by shifting the adjusting screw, so that the fixed shaft drives the movable rods of the adjusting units to slide in the movable grooves, and the adjusting units are linked with one another to adjust the size of the center opening. The wrench has the advantages of being capable of accurately adjusting the opening size of the wrench, convenient to operate and high in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of hardware tools, and particularly relates to an adjustable ratchet wrench. Background Art

[0002] A ratchet wrench is a manual tool for tightening and loosening screws. In the prior art, most of the ratchet rings installed at the opening of the head of the ratchet wrench have fixed specifications and sizes, and can only correspond to screws of corresponding sizes. When facing screws of different specifications during actual use, it is necessary to frequently replace ratchet wrenches of different specifications for screwing, which is not only inconvenient to use, but also inconvenient to carry multiple ratchet wrenches.

[0003] According to the adjustable ratchet wrench disclosed in the patent with the application number CN201720400076.2, by arranging a jaw with adjustable size inside an annular actuating part, different-sized workpieces can be clamped during work, and then the one-way transmission is realized by the cooperation of the ratchet and pawl. When it is necessary to change the direction, only need to turn the actuating part to the other side and clamp the workpiece again, thereby realizing the adjustable opening of the head of the ratchet wrench to adapt to screwing different specifications of screws.

[0004] However, the distance between the two jaws of this patent needs to be adjusted by an adjusting screw rod on the side, so it is not convenient to operate when adjusting the opening size, and the adjusted opening size is not accurate enough, and the two jaws are also prone to looseness when screwing the screw. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an adjustable ratchet wrench that is convenient for accurately adjusting the opening size for the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved by the following technical solutions: an adjustable ratchet wrench, including a wrench head, and an adjusting structure group, an inner ring adjusting ring and an outer ring adjusting ring are coaxially sleeved and installed from inside to outside at the central opening of the wrench head;

[0007] The adjusting structure group is formed by circumferentially connecting a plurality of adjusting units. Each adjusting unit includes a connecting rod, a bow-shaped block and a movable rod; the connecting rod is installed at the top of the bow-shaped block and is connected end to end with the connecting rods on adjacent adjusting units to form a closed ring to realize the linkage between multiple adjusting units; on the side of the bow-shaped block facing away from the central opening, a pair of parallel fixed clamping blocks are formed, and a fixed column is formed on one side of the fixed clamping block, and one end of the movable rod is sleeved on the fixed column;

[0008] The inner ring adjusting ring is formed by vertically combining an adjusting ratchet ring and a movable ring. An adjusting screw is installed in cooperation with the ratchet teeth of the adjusting ratchet ring, and a plurality of movable grooves are circumferentially corresponding to the upper and lower end faces of the movable ring;

[0009] The outer ring adjustment ring includes a spiral ring and a one-way ratchet ring. A spiral fixing ring is installed in the center of the spiral ring. A groove is formed on its side corresponding to the adjusting spiral. The adjusting spiral is installed in the groove and sleeved on the spiral fixing ring. A fixed shaft is vertically formed on the inner side of the one-way ratchet ring. The fixed shaft passes through the movable grooves on the upper and lower end surfaces of the movable ring and the other end of the movable rod on the adjustment unit respectively, so that the adjustment structure group, the inner ring adjustment ring and the outer ring adjustment ring are linked.

[0010] In the above-mentioned adjustable ratchet wrench, a hook-shaped head is formed at one end of the connecting rod, and the groove at the bottom of the hook-shaped head can be buckled on the rod at the other end of the adjacent connecting rod, so that multiple connecting rods are connected end to end to form a closed ring.

[0011] In the above-mentioned adjustable ratchet wrench, a limiting groove is opened on the bow block between a pair of fixed clamping blocks of the adjusting unit, and the limiting groove forms a limiting block on the side close to the hook head, and the limiting block corresponds to the limiting groove of the adjacent adjusting unit.

[0012] In the above-mentioned adjustable ratchet wrench, a one-way support tooth is installed on the outer side of the one-way ratchet ring of the outer ring adjustment ring corresponding to the wrench head, and the one-way support tooth includes a support tooth head, an elastic plate and a support tooth shaft connecting the two.

[0013] In the above-mentioned adjustable ratchet wrench, the number of the adjusting unit, the movable grooves on the upper and lower end surfaces of the movable ring and the fixed shaft is equal, and the number is preferably 5 or more.

[0014] Compared with the prior art, the utility model provides an adjustable ratchet wrench with a center opening adjustment method: by turning the rotating adjustment screw to drive the inner ring adjustment ring to rotate, the fixed shaft drives the movable rod of the adjustment unit to slide in the movable groove, thereby making each adjustment unit interlock with each other to adjust the size of the center opening. Since the adjustment screw is set on the top surface of the wrench, which is easy to operate, the user can accurately adjust the opening size according to the size of the screw at the center opening of the wrench, and the linkage adjustment of multiple adjustment units can better fit the outer surface of the screw, making the wrench less likely to loosen and easier to twist. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the adjustable ratchet wrench;

[0016] Figure 2 This is an exploded view of the structure of the head of the adjustable ratchet wrench;

[0017] Figure 3 It is a structural schematic diagram of the adjustment unit in the adjustable ratchet wrench.

[0018] In the above figures, 100 is the adjustment structure group; 101 is the adjustment unit; 110 is the connecting rod; 111 is the hook-shaped head; 120 is the bow-shaped block; 121 is the fixed clamping block; 122 is the limiting groove; 123 is the limiting block; 124 is the fixed column; 130 is the movable rod;

[0019] 200 is the inner ring adjustment ring; 210 is the adjustment ratchet ring; 220 is the movable ring; 221 is the movable groove; 230 is the adjustment screw; 300 is the outer ring adjustment ring; 310 is the screw ring; 311 is the screw fixing ring; 320 is the one-way ratchet ring; 330 is the fixed shaft; 400 is the one-way support tooth; 410 is the support tooth head; 420 is the elastic plate; 430 is the support tooth shaft. Specific embodiments

[0020] The following are specific embodiments of the present invention and, in combination with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0021] As Figures 1 to 3 shown, this adjustable ratchet wrench includes a wrench head. An adjustment structure group 100, an inner ring adjustment ring 200, and an outer ring adjustment ring 300 are coaxially sleeved and installed from the inside to the outside at the central opening of the wrench head. The opening size of the center of the adjustment structure group 100 that cooperates with the screw is adjusted by the mutual cooperation of the inner ring adjustment ring 200 and the outer ring adjustment ring 300.

[0022] As Figure 3 shown, the adjustment structure group 100 is formed by circumferentially connecting a plurality of adjustment units 101. The adjustment unit 101 includes a connecting rod 110, a bow-shaped block 120, and a movable rod 130. The number of adjustment units 101 is preferably 5 or more, so that the central opening presents a polygon, which can better fit the outer surface of the screw, making the wrench less likely to loosen and easier to perform the screwing operation.

[0023] The connecting rod 110 is installed at the top of the bow-shaped block 120. One end of it forms a hook-shaped head 111. The groove at the bottom of the hook-shaped head 111 can be buckled on the rod part of the other end of the adjacent connecting rod 110, so that a plurality of connecting rods 110 are connected end to end to form a closed ring, thereby realizing the linkage adjustment between multiple adjustment units 101.

[0024] The side of the arch block 120 facing the central opening is a flat surface, which is used to clamp the screw when the wrench is used. The side of the arch block 120 facing away from the central opening is a chord-shaped curved surface, which can enhance the force strength of the arch block 120. A pair of parallel fixed clamps 121 are formed in the middle and lower sections. The fixed clamps 121 are formed with a fixed column 124 connecting the two fixed clamps 121 on the side close to the hook head 111. A limiting groove 122 is opened on the arch block 120 between the pair of fixed clamps 121 on the other side. The limiting groove 122 forms a limiting block 123 on the side close to the hook head 111. The limiting block 123 corresponds to the limiting groove 122 of the adjacent adjustment unit 101. One end of the movable rod 130 is sleeved on the fixed column 124, so that the movable rod 130 can rotate around the fixed column 124.

[0025] Since several adjustment units 101 are connected circumferentially to form a linked annular structure, when the movable ends of the movable rods 130 of all the adjustment units 101 are displaced along the same circular trajectory, the vertical distance between the fixed end and the movable end of the movable rod 130 sleeved on the fixed column 124 will also change accordingly, thereby driving the arch block 120 and the connecting rod 110 to deflect inward or outward together. At this time, the limit block 123 slides in the limit slot 122 of the adjacent adjustment unit 101 to ensure that the several adjustment units 101 are at the same level, preventing the adjustment structure group 100 from being deformed as a whole when the screw is turned, resulting in uneven force.

[0026] like Figure 2 As shown, the outer side of the adjustment structure group 100 is provided with an inner ring adjustment ring 200, which is composed of an upper adjustment ratchet ring 210 and a lower movable ring 220. An adjustment screw 230 is installed in cooperation with the ratchet teeth on the outer side of the adjustment ratchet ring 210, and the spiral teeth of the adjustment screw 230 are meshed with the ratchet teeth. By turning the adjustment screw 230 to make it rotate around the center of the screw, the adjustment ratchet ring 210 can be driven to rotate together; if the adjustment screw 230 rotates around the axis of the inner ring adjustment ring 200, the entire inner ring adjustment ring 200 and the adjustment screw 230 rotate together around the axis.

[0027] The structural cross-section of the movable ring 220 is a U-shaped hollow structure with an opening facing inward, and its outer diameter is larger than the adjusting ratchet ring 210. The upper end face of the movable ring 220 is fixedly connected to the adjusting ratchet ring 210 on the same axis. The adjusting ratchet ring 210 is circumferentially provided with a plurality of movable grooves 221 on the upper end face of the movable ring 220 outwardly. The lower end face of the movable groove 221 is also provided with an movable groove 221 corresponding to the upper end face. The number of the movable grooves 221 on the same end face is equal to the number of the adjustment units 101.

[0028] The inner ring adjustment ring 200 is nested and installed in the outer ring adjustment ring 300. The outer ring adjustment ring 300 includes a spiral ring 310 at the upper end and a one-way ratchet ring 320 at the lower end. The center of the spiral ring 310 is a hollow structure, in which a spiral fixing ring 311 is installed in cooperation. A groove is formed at the side of the spiral ring 310 corresponding to the adjustment spiral 230. The adjustment spiral 230 is installed at the groove and sleeved on the spiral fixing ring 311, so that it can rotate with the spiral fixing ring 311 as the spiral center. Therefore, when the outer ring adjustment ring 300 rotates, the inner ring adjustment ring 200 can be driven to rotate together by the adjustment spiral 230 engaging the adjustment ratchet ring 210; when the adjustment spiral 230 rotates in the groove of the spiral ring 310, the outer ring adjustment ring 300 does not move, and the inner ring adjustment ring 200 rotates.

[0029] The ratchet teeth of the one-way ratchet ring 320 are matched with the one-way tooth 400 installed on the head of the wrench. The one-way tooth 400 includes a tooth head 410, an elastic plate 420 and a tooth shaft 430. The tooth head 410 of the one-way tooth 400 is a tooth shape corresponding to the engagement with the ratchet teeth. The elastic plate 420 extends from the side of the tooth head 410, and the tooth shaft 430 connects the tooth head 410 and the elastic plate 420. When the outer ring adjustment ring 300 rotates in the direction of the one-way tooth 400 tilting, the elastic plate 420 is compressed, the tooth head 410 rotates around the tooth shaft 430 and gradually separates from the meshed ratchet teeth until it is completely separated and jumps to the next ratchet tooth to mesh and fix under the rebound action of the elastic plate 420; when the outer ring adjustment ring 300 rotates in the opposite direction, it will be stuck by the one-way tooth 400, thereby achieving one-way rotation fixation.

[0030] A fixed shaft 330 is vertically formed on the inner side of the one-way ratchet ring 320, and the number of the fixed shafts 330 is also equal to the number of the adjustment units 101. The fixed shaft 330 passes through the movable groove 221 on the upper end face of the movable ring 220, the movable end of the movable rod 130 on the adjustment unit 101 and the movable groove 221 on the lower end face of the movable ring 220 from top to bottom, so that the adjustment structure group 100, the inner ring adjustment ring 200 and the outer ring adjustment ring 300 form a linkage.

[0031] The working principle of the utility model is: by rotating the outer ring adjustment ring 300 in one direction, the inner ring adjustment ring 200 and the adjustment structure group 100 are driven to rotate together, thereby adjusting the position of the adjustment screw 230 on the top surface of the wrench. By turning the rotating adjustment screw 230 to drive the inner ring adjustment ring 200 to rotate, the fixed shaft 330 drives the movable rod 130 of the adjustment unit 101 to slide in the movable groove 221, thereby making each adjustment unit 101 interlock with each other to adjust the size of the center opening. Since the adjustment screw 230 of the utility model is set on the top surface of the wrench that is easy to operate, the user can accurately adjust the opening size according to the size of the screw at the center opening of the wrench, which is easy to operate, accurate in adjustment, and more practical.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0033] Although various terms are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for more conveniently describing and explaining the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. An adjustable ratchet wrench, comprising a wrench head, characterized in that: An adjustment structure group (100), an inner ring adjustment ring (200) and an outer ring adjustment ring (300) are coaxially mounted from inside to outside at the central opening of the wrench head; The adjustment structure group (100) is composed of a plurality of adjustment units (101) connected circumferentially, and the adjustment unit (101) comprises a connecting rod (110), a bow block (120) and a movable rod (130); the connecting rod (110) is installed on the top of the bow block (120), and is connected end to end with the connecting rods (110) on adjacent adjustment units (101) to form a closed loop so as to realize linkage between the plurality of adjustment units (101); the bow block (120) is formed with a pair of parallel fixed clamping blocks (121) on the side facing away from the central opening, and a fixed column (124) is formed on one side of the fixed clamping block (121), and one end of the movable rod (130) is sleeved on the fixed column (124); The inner ring adjustment ring (200) is formed by the upper and lower combination of an adjustment ratchet ring (210) and a movable ring (220); an adjustment screw (230) is mounted on the ratchet teeth of the adjustment ratchet ring (210); and a plurality of movable grooves (221) are correspondingly provided on the upper and lower end surfaces of the movable ring (220) in the circumferential direction; The outer ring adjustment ring (300) comprises a spiral ring (310) and a one-way ratchet ring (320). A spiral fixing ring (311) is installed at the center of the spiral ring (310). A groove is formed on the side of the spiral ring corresponding to the adjustment spiral (230). The adjustment spiral (230) is installed at the groove and sleeved on the spiral fixing ring (311). A fixed shaft (330) is vertically formed on the inner side of the one-way ratchet ring (320). The fixed shaft (330) passes through the movable grooves (221) on the upper and lower end surfaces of the movable ring (220) and the other end of the movable rod (130) on the adjustment unit (101), respectively, so that the adjustment structure group (100), the inner ring adjustment ring (200) and the outer ring adjustment ring (300) form a linkage.

2. An adjustable ratchet wrench according to claim 1, characterized in that: A hook-shaped head (111) is formed at one end of the connecting rod (110), and a groove at the bottom of the hook-shaped head (111) can be buckled onto the rod portion at the other end of an adjacent connecting rod (110), so that a plurality of connecting rods (110) are connected end to end to form a closed loop.

3. An adjustable ratchet wrench according to claim 2, characterized in that: A limiting groove (122) is provided on the bow block (120) between a pair of fixed clamping blocks (121) of the adjustment unit (101); the limiting groove (122) forms a limiting block (123) on a side close to the hook-shaped head (111); the limiting block (123) corresponds to and cooperates with the limiting groove (122) of the adjacent adjustment unit (101).

4. The adjustable ratchet wrench according to claim 1, characterized in that: A one-way tooth (400) is installed on the outer side of the one-way ratchet ring (320) of the outer ring adjustment ring (300) at the corresponding position of the wrench head. The one-way tooth (400) comprises a tooth head (410), an elastic plate (420) and a tooth shaft (430) connecting the two.

5. The adjustable ratchet wrench according to claim 1, characterized in that: The number of the adjustment unit (101), the movable grooves (221) on the upper and lower end surfaces of the movable ring (220), and the fixed shafts (330) are equal, and the number is preferably 5 or more.

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