A heavy-duty ratchet friction wrench

Abstract

The present invention provides a heavy-duty ratchet friction wrench, which is provided with a wrench body, a wrench handle and a ratchet sleeve, the wrench body is provided with a clamping portion and a connecting portion, an expansion joint is provided between the clamping portion and the connecting portion, the wrench handle is provided with a fixing portion, the fixing portion is clamped with the clamping portion, so that the wrench body is clamped tightly to the ratchet sleeve by an external force; it is also provided with a pawl, the pawl is clamped with the ratchet teeth on the outer circumferential surface of the ratchet sleeve, so as to achieve the purpose of tightening the loose screw. The present invention has the flexibility of a ratchet wrench, and has the function of the wrench body clamping the ratchet sleeve, which increases the torque strength of the wrench, and can be widely used in the field of manual tool technology.

Description

Technical Field

[0001] The invention relates to the technical field of hand tools, in particular to a heavy-duty ratchet friction wrench. Background Art

[0002] A ratchet wrench is a tool for manually tightening and loosening screws, allowing users to assist in tightening and loosening bolts or nuts. Existing ratchet wrenches only rely on the engagement of the pawl and ratchet teeth to tighten screws, and the torque strength is not high. At the repair and maintenance site, the working efficiency is low for screws that require high torque to tighten and loosen. After long-term use, the ratchet wrench is prone to slippage and fall off, which makes the ratchet wrench unable to achieve the tightening and loosening effect, and even causes the ratchet wrench to be damaged and has a short service life. In addition, existing ratchet wrenches have many parts, are complex to install, and have a relatively narrow application range. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned technology and to provide a heavy-duty ratchet friction wrench which has a simple structure, high torsional strength, high working efficiency and is not prone to damage.

[0004] To this end, the present invention provides a heavy-duty ratchet friction wrench, which includes a wrench body, a wrench handle, a ratchet sleeve and a pawl. The wrench body is annular, a ratchet through hole is provided in the middle, a ratchet sleeve is provided in the ratchet through hole, and an outer circumferential surface of the ratchet sleeve is provided with an outer convex annular ratchet tooth. A clamping portion is provided at one end of the wrench body, and a connecting portion is provided at the other end of the wrench body. An expansion joint is provided between the clamping portion and the connecting portion. A clamping groove is provided on the connecting portion, and a wrench handle is provided in the clamping groove. The wrench handle is provided with a fixing portion, the fixing portion is clamped with the clamping portion, and the fixing portion and the connecting portion are fixedly connected through a connecting pin shaft; the wrench handle A receiving groove is also provided at the end with the fixing portion, and a pawl hole connected with the ratchet through hole is provided at the bottom of the slot. The pawl is T-shaped, one end of which is provided in the receiving groove, and the other end of which is provided in the pawl hole. The tip of the pawl passes through the pawl hole and engages with the ratchet tooth; a locking spring hole is provided at the T-shaped head end of the pawl, and a locking top spring is provided in the locking spring hole; a first opening and closing top spring hole is also provided at the bottom of the slot, and a second opening and closing top spring hole is provided at the end of the lever handle with the fixing portion, one end of the opening and closing top spring is provided in the first opening and closing top spring hole, and the other end of the opening and closing top spring is provided in the second opening and closing top spring hole.

[0005] Preferably, a limiting portion is provided at one end of the inner circumferential surface of the wrench body, and the limiting portion is protruding toward the center of the ratchet through hole in a stepped manner, and the left end face of the limiting portion abuts against the right end face of the ratchet tooth to prevent the ratchet sleeve from falling off from the right side of the ratchet through hole; a limiting groove is also provided on the outer circumferential surface of the ratchet sleeve, and a retaining spring groove is provided on the inner circumferential surface of the wrench body, and the retaining spring groove corresponds to the limiting groove, and a retaining spring is provided in the retaining spring groove, and the retaining spring is also provided in the limiting groove to prevent the ratchet sleeve from falling off from the left side of the ratchet through hole.

[0006] Preferably, a sleeve hole is provided in the middle of the ratchet sleeve, and the sleeve hole is a regular polygonal through hole or a special-shaped through hole.

[0007] Preferably, a sloped surface section is provided at the end of the pawl, and the sloped surface section is engaged with the ratchet tooth.

[0008] Preferably, grooves are provided on the end surfaces on both sides of the left and right sides of the wrench handle.

[0009] Preferably, an extended handle is connected to the end of the wrench handle.

[0010] The present invention provides a heavy-duty ratchet friction wrench, which has the following beneficial effects:

[0011] ⑴ The present invention is provided with a wrench body, a wrench handle and a ratchet sleeve. The wrench body is provided with a clamping portion and a connecting portion. An expansion joint is provided between the clamping portion and the connecting portion. The wrench handle is provided with a fixing portion, which is clamped with the clamping portion; it is also provided with a pawl, which is clamped with the ratchet teeth on the outer circumferential surface of the ratchet sleeve. When tightening the screw, force is applied to the wrench handle, and the pawl bites the ratchet teeth, so that the wrench body and the ratchet sleeve are integrated; continue to apply force to rotate the wrench handle, the fixing portion is tightly clamped with the clamping portion, the expansion joint shrinks, the wrench body holds the ratchet sleeve tightly, and the torsional strength of tightening the screw is increased. The wrench handle easily drives the wrench body and the ratchet sleeve to rotate together, and the screw is restricted by the sleeve hole and rotates with the wrench handle to achieve the purpose of locking the screw. During the tightening process, the wrench body holds the ratchet sleeve tightly with the ratchet sleeve as the torque increases, so that the ratchet sleeve is not easy to slip off and be damaged from the ratchet through hole, thereby extending the service life of the entire wrench.

[0012] After tightening to a certain degree, the wrench handle is rotated in the opposite direction, the expansion joint is opened, the fixed part loosens the clamping part, the wrench body loosens the ratchet sleeve, and the wrench handle is rotated in the opposite direction relative to the ratchet sleeve, so that the wrench handle is rotated back to a certain angle to facilitate the continued tightening of the screw. This reciprocating motion completes the tightening of the screw. When removing the screw, the screw can be removed by putting the screw on the other end of the hole and repeating the above operation.

[0013] (2) The present invention has a simple structure and is easy to assemble. It has the flexibility of a ratchet and the function of a wrench body clamping the ratchet sleeve, thereby increasing the torque strength of the wrench and making it easier to tighten the screws, thereby making the present invention have a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0015] Figure 2 It is an exploded view of the present invention without the extended handle;

[0016] Figure 3 It is a schematic diagram of the structure of the present invention after the pawl, locking top spring and opening and closing top spring are installed;

[0017] Figure 4 It is a structural schematic diagram of the main view of the wrench body;

[0018] Figure 5 yes Figure 4 The structural schematic diagram of the AA cross-sectional view shown;

[0019] Figure 6 yes Figure 4 The structural schematic diagram of the BB cross-sectional view shown;

[0020] Figure 7 yes Figure 4 The structural schematic diagram of the CC cross-sectional view shown;

[0021] Figure 8 It is a schematic diagram of the structure of the wrench handle;

[0022] Fig. 9 yes Figure 8 Structural diagram of the cross-section view;

[0023] Fig.10 It is a structural schematic diagram of the front view of the ratchet socket;

[0024] Fig.11 yes Fig.10 The structural schematic diagram of the DD cross-sectional view shown;

[0025] Fig.12 It is a schematic diagram of the structure of the pawl cross-section view.

[0026] Markings in the figure: 1. wrench body, 2. ratchet sleeve, 3. wrench handle, 4. connecting pin, 5. pawl, 6. opening and closing top spring, 7. retaining spring, 8. locking top spring, 11. expansion joint, 12. pawl hole, 13. clamping part, 14. first opening and closing top spring hole, 15. connecting part, 16. clamping groove, 17. limiting part, 18. retaining spring groove, 19. ratchet through hole, 21. ratchet, 22. limiting groove, 24. sleeve hole, 25. inclined section, 26. locking spring hole, 31. fixing part, 32. accommodating groove, 33. second opening and closing top spring hole, 34. groove, 35. extended handle. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercial products unless otherwise specified.

[0028] Depend on Figure 1As shown, the present invention provides a heavy-duty ratchet friction wrench, which includes a wrench body 1, a ratchet sleeve 2, a wrench handle 3 and a pawl 5. The wrench body 1 is annular, and a ratchet through hole 19 is provided in the middle thereof. A ratchet sleeve 2 is provided in the ratchet through hole 19, and an outer circumferential surface of the ratchet sleeve 2 is provided with an outwardly convex annular ratchet tooth 21. A sleeve hole 24 is provided in the middle of the ratchet sleeve 2, and the sleeve hole 24 is a regular polygonal through hole or a special-shaped through hole, which is convenient for clamping a screw.

[0029] Depend on Figure 2 to Figure 4 As shown, a clamping portion 13 is provided at one end of the wrench body 1, and a connecting portion 15 is provided at the other end of the wrench body 1. An expansion joint 11 is provided between the clamping portion 13 and the connecting portion 15. When tightening or loosening the screw, the expansion joint 11 shrinks or opens to make the wrench body 1 hold or loosen the ratchet sleeve 2. The connecting portion 15 is provided with a clamping slot 16, and a wrench handle 3 is provided in the clamping slot 16. The wrench handle 3 is provided with a fixing portion 31, and the fixing portion 31 is clamped with the clamping portion 13. The wrench handle 3 and the connecting portion 15 are fixedly connected together through a connecting pin 4. When tightening the screw, the expansion joint 11 shrinks, and the fixing portion 31 is tightly clamped with the clamping portion 13, so that the wrench body 1 is subjected to an external force to hold the ratchet sleeve 2, and the purpose of tightening and loosening the screw is more easily achieved. The wrench body 1 and the ratchet sleeve 2 are more closely combined, so that the ratchet sleeve 2 is not easy to slip off or be damaged from the ratchet through hole 19, thereby extending the service life of the entire wrench.

[0030] Depend on Figure 5 , Figure 8 , Fig. 9 , Fig.12 As shown, the end of the lever handle 3 provided with a fixing portion 31 is also provided with a receiving groove 32, the bottom of the slot 16 is provided with a pawl hole 12 connected to the ratchet through hole 19, the pawl 5 is T-shaped, one end of which is provided in the receiving groove 32, and the other end of which is provided in the pawl hole 12, and the end of the pawl 5 is provided with an inclined surface section 25, which passes through the pawl hole 12 and engages with the ratchet 21. The T-shaped head end of the pawl 5 is provided with a locking spring hole 26, and a locking top spring 8 is provided in the locking spring hole 26, one end of the locking top spring 8 rebounds against the bottom of the locking spring hole 26, and the other end of the locking top spring 8 rebounds against the bottom of the receiving groove 32. A first opening and closing top spring hole 14 is also provided at the bottom of the slot 16, and a second opening and closing top spring hole 33 is also provided at one end of the lever handle 3 having a fixed portion 31. The first opening and closing top spring hole 14 corresponds to the second opening and closing top spring hole 33. A closing and opening top spring 6 is provided in the first opening and closing top spring hole 14, and the closing and opening top spring 6 is also provided in the second opening and closing top spring hole 33. One end of the closing and opening top spring 6 rebounds against the bottom of the first opening and closing top spring hole 14, and the other end of the closing and opening top spring 6 rebounds against the bottom of the second opening and closing top spring hole 33.

[0031] Depend on Figure 6 , Figure 7 , Fig.10 , Fig.11As shown, the right end of the ratchet through hole 19 is provided with an annular limiting portion 17, which is stepped and convex toward the center of the ratchet through hole 19, and the left end face of the limiting portion 17 abuts against the right end face of the ratchet tooth 21, and the right end face of the ratchet sleeve 2 and the right end face of the wrench body 1 are in the same plane, and the ratchet sleeve 2 is clamped in the ratchet through hole 19 to prevent the ratchet sleeve 2 from falling off from the right side of the ratchet through hole 19. The outer circumferential surface of the ratchet sleeve 2 is also provided with a limiting groove 22, which is arranged on the left side of the ratchet tooth 21, and the inner circumferential surface of the wrench body 1 is provided with a retaining spring groove 18, which corresponds to the limiting groove 22, and a retaining spring 7 is arranged in the retaining spring groove 18, and the retaining spring 7 is also arranged in the limiting groove 22 to prevent the ratchet sleeve 2 from falling off from the left side of the ratchet through hole 19.

[0032] Depend on Figure 1 As shown, grooves 34 are provided on the left and right end surfaces of the wrench handle 3, which can reduce the weight of the wrench handle 3, thereby reducing the labor intensity of the user. The end of the wrench handle 3 can also be connected to an extended handle 35 to increase the torque and make tightening the screw easier.

[0033] The working principle of the present invention is:

[0034] When tightening the screw, the sleeve hole 24 is sleeved on the outer circumference of the screw, and force is applied to the lever handle 3. The pawl 5 bites the ratchet 21 under the action of the locking top spring 8, so that the one-way ratchet 21 cannot rotate in the opposite direction. The wrench body 1 and the ratchet sleeve 2 form a whole and are relatively immobile. The ratchet sleeve 2 is in a static state of being screwed by external force. Continue to apply force to rotate the lever handle 3, the tension and closing top spring 6 pushes the lever handle 3 back, the fixed part 31 is tightly engaged with the clamping part 13, the expansion joint 11 shrinks, the lever body 1 holds the ratchet sleeve 2, the torque strength of tightening the screw increases, the lever handle 3 drives the lever body 1 and the ratchet sleeve 2 to rotate together, and the screw is restricted by the sleeve hole 24 and rotates with the lever handle 3, thereby achieving the purpose of locking the screw.

[0035] After being tightened to a certain degree, the wrench handle 3 is rotated in the opposite direction, the expansion joint 11 is opened, the fixing portion 31 releases the clamping portion 13, and the wrench body 1 releases the ratchet sleeve 2. Since the ratchet 21 is a one-way ratchet, the inclined surface section 25 of the pawl 5 has a forward slope relative to the one-way ratchet 21. During the reverse rotation of the wrench body 1 with the wrench handle 3, the ratchet sleeve 2 is restricted by the screw and does not rotate. The pawl 5 pops out from one ratchet 21 and engages with the other ratchet 21 in turn, so that the wrench handle 3 rotates back a certain angle, which is convenient for continuing to tighten the screw. Such reciprocating motion completes a working cycle.

[0036] When removing the screw, the whole wrench is turned over, and the screw is sleeved from the other end of the sleeve hole 24 and the above operation is repeated to achieve the purpose of removing the screw.

[0037] The present invention adds a clamping function under the action of the ratchet, so that the ratchet sleeve 2 has the flexibility of the ratchet and the high-strength torque of the friction wrench, and has a wide range of applications.

[0038] In the description of the present invention, it is necessary to understand that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A heavy-duty ratchet friction wrench, comprising a wrench body, a wrench handle, a ratchet sleeve and a ratchet pawl, wherein the wrench body is annular, a ratchet through hole is provided in the middle thereof, the ratchet through hole is provided with the ratchet sleeve, and the outer circumferential surface of the ratchet sleeve is provided with an outwardly convex annular ratchet tooth, characterized in that: A clamping portion is provided at one end of the wrench body, a connecting portion is provided at the other end of the wrench body, an expansion joint is provided between the clamping portion and the connecting portion, a clamping slot is provided at the connecting portion, the wrench handle is provided in the clamping slot, the wrench handle is provided with a fixing portion, the fixing portion is clamped with the clamping portion, and the fixing portion and the connecting portion are fixedly connected via a connecting pin; a receiving slot is also provided at the end of the wrench handle provided with the fixing portion, a pawl hole connected to the ratchet through hole is provided at the bottom of the clamping slot, and the pawl is T-shaped, one end of which is arranged in the receiving groove, and the other end of which is arranged in the pawl hole, and the end of the pawl passes through the pawl hole and engages with the ratchet; a locking spring hole is provided at the T-shaped head end of the pawl, and a locking top spring is provided in the locking spring hole; a first opening and closing top spring hole is also provided at the bottom of the slot, and a second opening and closing top spring hole is also provided at the end of the wrench handle provided with a fixing portion, one end of the opening and closing top spring is provided in the first opening and closing top spring hole, and the other end of the opening and closing top spring is provided in the second opening and closing top spring hole; A sleeve hole is provided in the middle of the ratchet sleeve, and the sleeve hole is a regular polygonal through hole or a special-shaped through hole; The end of the pawl is provided with an inclined surface section, and the inclined surface section is engaged with the ratchet tooth.

2. A heavy-duty ratchet friction wrench according to claim 1, characterized in that: A limiting portion is provided at one end of the inner circumferential surface of the wrench body, and the limiting portion is protruded in a stepped manner toward the center of the ratchet through hole. The left end face of the limiting portion abuts against the right end face of the ratchet tooth to prevent the ratchet sleeve from falling off from the right side of the ratchet through hole; a limiting groove is also provided on the outer circumferential surface of the ratchet sleeve, and a retaining spring groove is provided on the inner circumferential surface of the wrench body, and the retaining spring groove corresponds to the limiting groove. A retaining spring is provided in the retaining spring groove, and the retaining spring is also provided in the limiting groove to prevent the ratchet sleeve from falling off from the left side of the ratchet through hole.

3. A heavy-duty ratchet friction wrench according to claim 1, characterized in that: The end surfaces on the left and right sides of the wrench handle are both provided with grooves.

4. A heavy-duty ratchet friction wrench according to claim 1, characterized in that: An extended handle is connected to the end of the wrench handle.

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