Ratchet tap wrench

Abstract

The utility model provides a ratchet screw tap wrench, and belongs to the technical field of screw tap wrenches. The ratchet tap wrench comprises a wrench frame body, a ratchet ring and a wrench handle, the ratchet ring is installed in the wrench frame, a square hole is formed in the center of the ratchet ring, and a plurality of inclined limiting grooves are evenly formed in the outer side of an annular limiting step of the outer side wall in the circumferential direction. A step mounting groove correspondingly matched with the limiting step is formed in the inner side wall of the wrench frame body; the wrench handles are integrally arranged on the two sides of the wrench frame body, triangular grooves are formed in the side edges of the wrench handles, inclined mounting through holes obliquely penetrating through the triangular grooves and the center of the wrench frame body are formed in the wrench handles, limiting assemblies are arranged in the inclined mounting through holes, and each limiting assembly sequentially comprises a limiting clamping block, a fastening spring and a fixing plug from inside to outside. And the limiting clamping block extends into the inclined limiting groove of the ratchet ring under the action of the fastening spring and is in limiting fit with the inclined limiting groove. The utility model has the advantages of uniform stress, difficult eccentricity, prevention of loosening and slipping, and guarantee of tapping precision and quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of tap wrenches, in particular to a ratchet tap wrench. Background Art

[0002] A tap wrench is a tool used to clamp a hand tap when tapping. A conventional round die tap wrench is mainly composed of a wrench handle, a wrench body and a round die. When in use, the tenon at the tail of the tap is inserted into the tooth in the center of the round die, and the round die is squeezed through the locking screw on the outside of the wrench body to complete the relative tightening and fixation between the tap wrench and the tap.

[0003] The problems with this structure are: the locking screw on one side can easily cause the internal circular die to be eccentric, resulting in uneven force on the tap during tapping; the method of fixing the tap by the center of the circular die can easily cause loosening and slipping during twisting use, affecting the tapping accuracy and quality. Utility Model Content

[0004] The utility model aims to provide a ratchet tap wrench in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: a ratchet tap wrench, comprising a wrench frame, a ratchet ring and a wrench handle; the ratchet ring is mounted in the wrench frame, a square hole is provided in the center, an annular limiting step is formed on the outer wall of the middle section, and a plurality of oblique limiting grooves are evenly provided on the outer wall of the limiting step; the wrench frame is in an annular shape as a whole, and a step installation groove corresponding to the limiting step on the ratchet ring is provided on the inner wall;

[0006] The wrench handles are integrally arranged on both sides of the wrench frame, and a triangular groove is provided on the side of the wrench handle near the wrench frame. An oblique mounting through hole obliquely penetrating the triangular groove and the center of the wrench frame is provided inside the wrench handle between the triangular groove and the wrench frame. A limiting assembly is arranged inside the oblique mounting through hole, and the limiting assembly includes a limiting block, a tightening spring and a fixed plug from the inside to the outside. Under the action of the tightening spring, the limiting block extends into the oblique limiting groove of the ratchet ring and cooperates with it in a limiting manner.

[0007] In the above-mentioned ratchet tap wrench, an annular groove is opened on the inner side wall of the wrench frame below the step mounting groove, and the depth of the groove is shallower than that of the step mounting groove.

[0008] In the above-mentioned ratchet tap wrench, an O-ring is installed in the groove, and the installed O-ring is located below the ratchet ring limiting step.

[0009] In the above-mentioned ratchet tap wrench, the oblique mounting through hole is provided with an internal thread on the inner wall at one end close to the triangular groove, and the second section outer wall of the fixed plug is provided with an external thread of the plug, and the internal thread of the hole is matched and connected with the external thread of the plug so that the fixed plug compresses the tightening spring, thereby fixing the limit block in the oblique limit groove of the ratchet ring.

[0010] In the above-mentioned ratchet tap wrench, the limit assembly, triangular groove and oblique mounting through hole together constitute a limit structure for fixing the ratchet ring to unidirectional rotation. The limit structure has two groups, which are centrally symmetrically distributed on the wrench handles on both sides.

[0011] Compared with the prior art, the ratchet tap wrench provided by the utility model cooperates with the ratchet ring through two sets of limit assemblies, so that the ratchet ring in the center of the wrench frame can achieve unidirectional rotation fixation while ensuring uniform force, thereby preventing loosening and slipping when the tap wrench is twisted in use, thereby ensuring the tapping accuracy and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the ratchet tap wrench;

[0013] Figure 2 This is the structural explosion diagram of the ratchet tap wrench;

[0014] In the above figure, 100, wrench frame; 110, step mounting groove; 120, groove; 200, ratchet ring; 210, square hole; 220, limiting step; 221, oblique limiting groove; 230, O-ring; 300, wrench handle; 310, triangular groove; 320, oblique mounting through hole; 321, internal thread of the hole; 330, limiting assembly; 331, fixed plug; 332, external thread of the plug; 333, tightening spring; 334, limiting block. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0016] like Figure 1 to Figure 2 As shown, the ratchet tap wrench includes a wrench frame 100 , a ratchet ring 200 and a wrench handle 300 . The ratchet ring 200 is cooperatively installed in the wrench frame 100 , and the wrench handle 300 is integrally arranged on both sides of the wrench frame 100 .

[0017] A square hole 210 is provided in the center of the ratchet ring 200, and the square hole 210 is used to fit the square tenon at the tail of the tap for clamping. An annular limiting step 220 is formed on the outer wall of the middle section of the ratchet ring 200, and a plurality of oblique limiting grooves 221 are evenly provided on the outer wall of the limiting step 220. The bottom of the oblique limiting groove 221 is semicircular, and the oblique groove direction is the tangent direction of the semicircular straight edge on the annular outer wall of the limiting step 220.

[0018] The wrench frame 100 is in the shape of a circular ring as a whole, and a step installation groove 110 is provided on its inner side wall, which corresponds to the limiting step 220 on the ratchet ring 200, and is used to rotatably limit the ratchet ring 200 therein. An annular groove 120 is provided on the inner side wall of the wrench frame 100 below the step installation groove 110, and the depth of the groove 120 is shallower than that of the step installation groove 110. An O-ring 230 is installed in the groove 120, and the installed O-ring 230 is located below the limiting step 220 of the ratchet ring 200, and the O-ring 230 plays the role of clamping the ratchet ring 200 in the wrench frame 100.

[0019] A triangular groove 310 is provided on the side of the wrench handle 300 near the wrench frame 100, and an oblique installation through hole 320 obliquely penetrating the triangular groove 310 and the center of the wrench frame 100 is provided inside the wrench handle 300 between the triangular groove 310 and the wrench frame 100, and the oblique installation hole has an inclination direction consistent with the oblique limiting groove 221, and a limiting assembly 330 is provided inside the oblique installation hole. The limiting assembly 330, the triangular groove 310 and the oblique installation through hole 320 together constitute a limiting structure for fixing the ratchet ring 200 to rotate in one direction, and the limiting structure has two groups, which are centrally symmetrically distributed on the wrench handles 300 on both sides to ensure that the two sides of the ratchet ring 200 are evenly stressed to prevent eccentricity during tapping.

[0020] The limiting assembly 330 is provided with a limiting block 334, a tightening spring 333 and a fixed plug 331 in sequence from the inside to the outside of the oblique installation through hole 320. The oblique installation through hole 320 is provided with an inner hole thread 321 on the inner side wall at one end close to the triangular groove 310. The fixed plug 331 is a three-section structure, and the outer diameter of the plug gradually decreases toward the inside of the through hole. One section is located outside the oblique installation through hole 320 for hand-held rotation; the outer side wall of the second section is provided with an outer plug thread 332 that matches and connects with the inner hole thread 321, and is used to fix the fixed plug 331 at one end of the oblique installation through hole 320 located at the triangular groove 310; the third section extends into the middle of the tightening spring 333, and the step surface between the second and third sections is used to compress the tightening spring 333.

[0021] After the tightening spring 333 is compressed by pressure, it will generate a thrust on the limit block 334 under the action of its own elastic force, so that the limit block 334 extends into the oblique limit groove 221 of the ratchet ring 200 and is limited thereto. Since the limit block 334 is blocked by the bottom of the oblique limit groove 221, the ratchet ring 200 can only rotate in the opposite direction of the slotting direction of the oblique limit groove 221, thereby realizing the unidirectional rotation limit of the ratchet ring 200. When the ratchet tap wrench is clamping the tap, it only needs to perform twisting tapping in the opposite direction of the rotation direction of the ratchet ring 200 to prevent the tap and the wrench from loosening and slipping, so as to ensure the tapping accuracy and quality.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0023] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A ratchet tap wrench, comprising a wrench frame (100), a ratchet ring (200) and a wrench handle (300); characterized in that: The ratchet ring (200) is mounted in the wrench frame (100), a square hole (210) is provided in the center thereof, an annular limiting step (220) is formed on the outer wall of the middle section and protrudes outwardly in the circumferential direction, and a plurality of oblique limiting grooves (221) are evenly provided in the circumferential direction on the outer wall of the limiting step (220); the wrench frame (100) is in the shape of a circular ring as a whole, and a step installation groove (110) corresponding to the limiting step (220) on the ratchet ring (200) is provided on the inner wall thereof; The wrench handle (300) is integrally arranged on both sides of the wrench frame (100); a triangular groove (310) is provided on the side of the wrench handle (300) near the wrench frame (100); an oblique installation through hole (320) obliquely penetrating the triangular groove (310) and the center of the wrench frame (100) is provided inside the wrench handle (300) between the triangular groove (310) and the wrench frame (100); a limiting assembly (330) is provided inside the oblique installation through hole (320); the limiting assembly (330) comprises a limiting block (334), a tightening spring (333) and a fixed plug (331) from inside to outside; the limiting block (334) extends into the oblique limiting groove (221) of the ratchet ring (200) under the action of the tightening spring (333) to be limitedly matched therewith.

2. A ratchet tap wrench according to claim 1, characterized in that: An annular groove (120) is provided on the inner side wall of the wrench frame (100) below the step installation groove (110), and the depth of the groove (120) is shallower than that of the step installation groove (110).

3. A ratchet tap wrench according to claim 2, characterized in that: An O-ring (230) is installed in the groove (120), and the installed O-ring (230) is located below the limiting step (220) of the ratchet ring (200).

4. A ratchet tap wrench according to claim 1, characterized in that: The oblique mounting through hole (320) is provided with an inner hole thread (321) on the inner side wall at one end close to the triangular groove (310), and the second section outer side wall of the fixed plug (331) is provided with a plug outer thread (332), and the inner hole thread (321) is matched with the plug outer thread (332) to be connected so that the fixed plug (331) compresses the fastening spring (333), thereby matching and fixing the limit block (334) in the oblique limit groove (221) of the ratchet ring (200).

5. A ratchet tap wrench according to claim 1, characterized in that: The limiting assembly (330), the triangular groove (310) and the oblique mounting through hole (320) together constitute a limiting structure for fixing the ratchet ring (200) to unidirectional rotation. The limiting structure has two groups, which are centrally symmetrically distributed on the two side spanner handles (300).

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