ratchet wrench

Abstract

This invention relates to a ratchet wrench, which includes a wrench body having a wrench front and a wrench back located on opposite sides, and a through hole; an inner center member having a first end face and a second end face extending radially, and a central end face opposite the first end face, the inner center member being inserted into the through hole along an axial direction such that the first end face abuts against the wrench front; and an outer ring member having a second end face and a third end face opposite to each other, the second end face being inserted between the inner center member and the wrench body, a third end face of the third end face abutting against the wrench back, and a concave surface of the third end face adjacent to the central end face; thereby, pressing the central end face together causes the central end face to be deformed and covered by the concave surface, thus fixing the wrench body, the inner center member, and the outer ring member together.

Description

ratchet wrench Technical Field

[0001] This invention is a type of wrench, specifically a ratchet wrench that enhances the magnetic attraction of the screwdriver bit. Prior Technology

[0002] Please refer to Figures 10 and 11. Traditional ratchet wrenches consist of a wrench body A, a ratchet part B, and a limiting member C. The limiting member C is used to fix the ratchet part B to the wrench body A.

[0003] In order to achieve the desired connection within a limited space without using other parts, a stamping connection method as disclosed in Republic of China Patent Publication No. TW202103858A "Ratchet Wrench and Manufacturing Method Thereof" is used, thus eliminating the need for the limiting member C.

[0004] The ratchet wrench mentioned above is used with a screwdriver bit. Some ratchet wrenches have a magnet inside that can attract the screwdriver bit and give the screwdriver bit a magnetic force to further magnetically hold the screw, making it easy to assemble and lock.

[0005] However, in the aforementioned ratchet wrench, the ratchet component B is a single piece and is a magnetic component. The magnetic force of the magnet E will be diluted by the ratchet component B. Although the magnetic force can still attract the screwdriver bit, it is less likely to attract the screw to be installed after the magnetic force is transmitted to the screwdriver bit.

[0006] To overcome the problem of magnetism, ratchet part B can be replaced with a non-magnetic material, such as stainless steel. The magnetic force of magnet E will not be diluted by ratchet part B and will be directly guided to the screwdriver bit. Therefore, the screwdriver bit has a large magnetic attraction force to attract screws. However, stainless steel itself has low hardness, and the teeth on the outer periphery of ratchet part B are prone to wear, which will affect the operation of the ratchet wrench.

[0007] To overcome the problem of low material hardness, this case divides the ratchet parts into two components: an inner part and an outer part. The inner part is mainly made of non-magnetic material, while the outer part is mainly made of material with higher hardness, such as tool steel.

[0008] During assembly, this case attempted to fix the components using a tight fit method, but the internal and external parts would still detach from the wrench body during subsequent use. Therefore, further attempts were made to fix the internal and external parts to the wrench body using adhesive materials such as glue or oxygen-deficient glue, but the effect was not effective, and the internal and external parts would still detach from the wrench body.

[0009] In order to achieve a connection within a limited space without using other parts, for example, the stamping connection method disclosed in the aforementioned Republic of China Patent Publication No. TW202103858A "Ratchet Wrench and Manufacturing Method Thereof" can be used.

[0010] However, the aforementioned case uses stamping to deform one end of the ratchet, thereby fixing the ratchet and the wrench body to each other. But when the end is deformed and directly contacts the wrench body to be fixed, there may be uncertain factors in the stamping process, such as the stamped part not fitting snugly to the wrench body, or the ratchet not being able to be firmly attached to the wrench body, resulting in gaps between the ratchet and the wrench body.

[0011] Furthermore, when using the aforementioned case, in this type of connection, the deformed part will rotate relative to the wrench body. With long-term use and wear, the possibility that the deformed part may not be able to be securely connected to the wrench body cannot be ruled out. Summary of the Invention

[0012] Therefore, to solve the problem of insufficient magnetic force in ratchet wrenches and the problems associated with assembling related parts, such as the issue of the deformed contact surface rotating relative to the wrench body, a ratchet wrench is proposed, comprising:

[0013] A wrench body has a wrench front and a wrench back located on opposite sides, and a through hole extending axially through the wrench front and the wrench back; an inner center member has a first end extending axially, a resting portion extending axially from the first end, and a central portion extending axially from the resting portion; the first end has a first end face extending radially, the resting portion has a second end face extending radially, and the central portion has a central end face opposite to the first end; the inner center member is inserted axially into the through hole, with the first end face abutting against the wrench front, and the inner surface of the through hole abutting against the outer surface of the resting portion radially; the central portion has a locking ring surface; the inner center member is made of non-magnetic material; an outer ring member has an outer ring member through hole, the shape of which corresponds to the locking ring surface; the outer ring member extends axially with an opposite second end and a third end; the third end face extending radially from the second end... A third end face extends outward, and an outer ring face is located between the second end face and the third end face. The outer ring face has a plurality of teeth. The third end face extends radially inward and has an inner concave surface. The outer ring face is fitted onto the locking ring face through a hole in the outer ring face and engages with the center portion. The second end face is located radially between the inner center portion and the wrench body, and abuts against the second end face. The third end face abuts against the back of the wrench, and the center portion is adjacent to the inner concave surface. A shift lever is located on the wrench body, and one end of the shift lever engages with the aforementioned teeth of the outer ring face. The center portion is pressed along the axial direction, so that the center portion is deformed radially and covers the inner concave surface. At the same time, the outer ring face is confined between the second end face and the deformed center portion, and the wrench body is confined between the first end face and the third end face, thereby fixing the wrench body, the inner center portion, and the outer ring face together.

[0014] Furthermore, the inner central component has a recessed groove at its center, and a magnet is embedded in the groove.

[0015] Furthermore, the material of the inner center component is one of the following: SUS304 stainless steel or SUS316 stainless steel; the material of the outer ring component is one of the following: carbon tool steel, alloy tool steel, or high-speed steel.

[0016] Furthermore, the concave surface sequentially includes, in the axial direction, a sloped segment extending along both the axial direction and the radial direction, a vertical segment extending along the axial direction, and a planar segment extending along the radial direction, with the deformed central end covering the planar segment, the vertical segment, and a portion of the sloped segment.

[0017] Furthermore, the deformed central end is looped and completely covers the concave surface in the circumferential direction.

[0018] Furthermore, the deformed central end includes a plurality of spaced-apart stamping points that extend radially and cover the concave surface.

[0019] Furthermore, the aforementioned stamping point is circular in shape.

[0020] Furthermore, the length of the first end face in the radial direction is greater than the length of the second end face in the radial direction, and the length of the second end face in the radial direction is greater than the length of the center portion in the radial direction.

[0021] The following effects can be achieved based on the above technical features:

[0022] 1. The inner center piece and the outer ring piece are fixed by deforming the center end through riveting and pressing. The wrench body is then confined between the first end face of the inner center piece and the third end face of the outer ring piece. No additional parts are needed during assembly, and it is not easy to fall off. It also saves assembly steps.

[0023] 2. With prolonged use, the parts that come into contact with the ratchet wrench and screwdriver bit are prone to wear and require repair or maintenance. The wear is mainly caused by the groove in the inner center part. Therefore, when replacing it, only the inner center part needs to be removed, without having to replace the outer ring part, which has a higher manufacturing cost. This can significantly reduce maintenance costs and the outer ring part can be reused.

[0024] 3. The deformed central end simultaneously covers the planar segment, the vertical segment, and part of the inclined segment, and makes the central end contact the concave surface in multiple directions, increasing the contact area between the central end and the concave surface, thereby increasing the bonding strength.

[0025] 4. When using a ratchet wrench, the inner center piece and the outer ring piece rotate synchronously along the axial direction within the through hole. During rotation, the front of the wrench body moves relative to the first end face, while the back of the wrench body moves relative to the third end face. There is no relative movement between the center end of the inner center piece and the concave surface of the outer ring piece, thus ensuring that the center end after riveting will not be affected by external force and will not detach from the concave surface.

[0026] 5. The inner center component is non-magnetic. The magnetic force of the magnet installed inside the inner center component can be completely guided to the contacting screwdriver tip, so that the screwdriver tip has a strong magnetic force and can attract the screw or bolt to be used. Simple Explanation of the Diagram

[0027] [Image 1] is a partial three-dimensional view of this creation.

[0028] [Second Image] is a breakdown diagram of this work.

[0029] [Figure 3] is a partial sectional view of this work.

[0030] [Figure 4] is a flowchart of the assembly process for creating this book.

[0031] [Figure 5] is a schematic diagram of the use of the riveting and pressing center end of this assembly.

[0032] [Figure 6] is a schematic diagram of the use of the riveting and pressing center end of the assembly of this creation.

[0033] [Figure 7] is a magnified view of the central end of the deformed version of this work.

[0034] [Figure 8] is a diagram illustrating the use of connecting the screwdriver tip in this work.

[0035] [Figure 9] is a partial assembly diagram of the central end of this creation, which has multiple stamping points.

[0036] [Figure 10] is a partial view of a commonly known ratchet wrench.

[0037] [Figure 11] is a cross-sectional view of a conventional ratchet wrench. Implementation

[0038] Based on the above technical features, the main functions of this ratchet wrench can be clearly demonstrated in the following embodiments.

[0039] Please refer to Figure 1, Figure 2 and Figure 3. This ratchet wrench includes a wrench body 1, an inner center part 2, an outer ring part 3, a magnet 4 and a shift lever.

[0040] The wrench body 1 has a wrench front 11 and a wrench back 12 located on opposite sides, and a through hole 13 passing through the wrench front 11 and the wrench back 12 along an axial direction D1; specifically, the wrench body 1 has a grip end (not shown in the figure) and the through hole 13 located relative to the grip end.

[0041] The inner center member 2 extends along the axial direction D1 and has a first end 21, an abutment portion 22 extending from the first end 21 along the axial direction D1, and a central portion 23 extending from the abutment portion 22 along the axial direction D1. The first end 21 extends in a radial direction D2 and has a first end face 211. The abutment portion 22 extends in a radial direction D2 and has a second end face 221. The central portion 23 has a central end 231 opposite to the first end 21. The inner center member 2 is inserted into the through hole 13 along the axial direction D1, with the first end face 211 abutting against the front surface 11 of the wrench. The inner surface of the through hole 13 abuts against the outer surface of the abutment portion 22 in a radial direction D2. The central portion 23 has a locking ring surface 23. 2. The material of the inner center component 2 is non-magnetic; specifically, the first end 21, the abutment portion 22 and the center portion 23 are in the form of a stepped cylinder and have the same central axis, and the length of the first end face 211 in the radial direction D2 is greater than the length of the second end face 221 in the radial direction D2, the length of the second end face 221 in the radial direction D2 is greater than the length of the center portion 23 in the radial direction D2, the locking ring surface 232 has a recessed annular groove 233 near the second end face 221, the inner center component 2 has a recessed groove 24 at the center position, the magnet 4 is embedded in the groove 24, and the material of the inner center component is one of the following: SUS304 stainless steel or SUS316 stainless steel.

[0042] The outer ring 3 has an outer ring through hole 31, which corresponds to the shape of the locking ring surface 232. The outer ring 3 extends along the axial direction D1 and has a second end 32 and a third end 33. The third end 33 extends outward in the radial direction D2 and has a third end face 331. There is an outer ring surface 34 between the second end 32 and the third end 33. The outer ring surface 34 is provided with a plurality of teeth. The third end 33 extends inward in the radial direction D2 and has an inward concave surface 332. The outer ring 3 fits onto the locking ring surface 232 through the outer ring through hole 31 and engages with the center portion 23. The second end 32 is positioned in the radial direction D2 between the inner center portion 23. Between the wrench body 1, the second end 32 abuts against the second end face 221, the third end face 331 abuts against the back of the wrench 12, and the center end 231 is adjacent to the concave surface 332; specifically, the length of the second end 32 in the radial direction D2 is less than the length of the second end face 221 in the radial direction D2, and the concave surface 332 sequentially includes a sloped section 3321 extending along both the axial direction D1 and the radial direction D2, a vertical section 3322 extending along the axial direction D1, and a flat section 3323 extending along the radial direction D2 in the axial direction D1. The material of the outer ring 3 is one of the following: carbon tool steel, alloy tool steel, high speed steel.

[0043] The shift paddle is disposed on the wrench body 1, and one end of the shift paddle engages with the aforementioned teeth of the outer ring 3.

[0044] Please refer to Figures 4, 5, 6, and 7. The assembly method of the ratchet wrench includes the following steps: the inner center member 2 is inserted into the through hole 13 along the axial direction D1, and the first end face 211 abuts against the front face 11 of the wrench. The inner surface of the through hole 13 abuts against the outer surface of the abutting part 22 in the radial direction D2. The outer ring member 3 is fitted onto the locking ring surface 232 through the outer ring member through hole 31 and engages with the center part 23. The second end 32 is positioned in the radial direction D2 between the inner center member 2 and the wrench body. Between the bodies 1, the second end 32 abuts against the second end face 221, and the locking ring surface 232 is provided with the ring groove 233 near the second end face 221, so that the second end 32 can completely abut against the second end face 221, the third end face 331 abuts against the back of the wrench 12, and after the central end 231 is adjacent to the concave surface 332, the central end 231 is pressed along the axial direction D1, so that the central end 231 is squeezed and deformed along the radial direction D2 to cover the concave surface 332. At the same time, the outer ring 3 The wrench body 1 is confined between the second end face 221 and the deformed center end 231, and the wrench body 1 is confined between the first end face 211 and the third end face 331, thereby fixing the wrench body 1, the inner center member 2, and the outer ring member 3 to each other; specifically, a stamping part 5 is used to stamp the center end 231. The stamping part 5 has a stamping end, and the shape of the stamped center end 231 is determined according to the shape of the stamping end. In the first embodiment, the shape of the center end 231 is formed as follows: The ring-shaped central end 231 completely covers the concave surface 332 in the circumferential direction, and the deformed central end 231 simultaneously covers the planar section 3323, the vertical section 3322, and part of the inclined section 3321. The ring-shaped central end 231, which completely covers the concave surface in the circumferential direction, has a more aesthetically pleasing appearance. It also makes the combined wrench body 1, the inner central part 2, and the outer ring part 3 have an integrated and textured shape, thus showing a layered visual experience. In addition, it is not apparent from the appearance that the ratchet wrench of this invention uses a riveting and pressing method for fixing.

[0045] When using the ratchet wrench of this invention after assembly, the inner center member 2 and the outer ring member 3 rotate synchronously along the axis D1 in the through hole 13. During rotation, the wrench front 11 of the wrench body 1 moves relative to the first end face 211, while the wrench back 12 of the wrench body 1 moves relative to the third end face 331. There is no relative movement between the central end 231 of the inner center member 2 and the concave surface 332 of the outer ring member 3. This ensures that the central end 231 will not be affected by external force and will not detach from the concave surface 332 after riveting, and that the central end 231 and the concave surface 332 will not wear against each other.

[0046] Please refer to Figure 8. The screwdriver bit 6 is actually installed in the groove 24. The inner center piece 2 is not magnetic. The magnetic force of the magnet 4 installed inside the inner center piece 2 can be completely guided to the screwdriver bit 6 in contact, so that the screwdriver bit 6 has a strong magnetic force and can attract the screw or bolt to be used.

[0047] Please refer to Figure 9. In the second embodiment of this invention, a stamping end with a different shape can be used to stamp the center end 231, so that the deformed center end 231 includes a plurality of stamping points arranged at intervals. The aforementioned stamping points extend in the radial direction D2 and cover the concave surface 332. The aforementioned stamping points are circular in shape. This is also one of the ways that this invention can be implemented, but it is not a limitation.

[0048] Based on the above description of the embodiments, one can fully understand the operation, use and effects of this invention. However, the above embodiments are only preferred embodiments of this invention and should not be used to limit the scope of implementation of this invention. Simple equivalent changes and modifications made in accordance with the scope of the patent application and the description of this invention are all within the scope of this invention.

[0049] 1: Wrench body 11: Front of the wrench 12: Back of the wrench 13: Through-hole 2: Inner center component 21: First end 211: First end face 22: Reliance Department 221: Second end face 23: Central Section 231: Central end 232: Card-operated ring surface 233: Annular groove 24: Groove 3: Outer ring component 31: Perforation of outer ring component 32: Second end 33: Third end 331: Third end face 332:Inner concave surface 3321: Inclined section 3322: Facade Section 3323: Planar segment 34: Outer ring surface 4: Magnet 5: Stamped parts 6: Screwdriver tip D1: Axial direction D2: Radial A: Wrench body B: Ratchet parts C: Limiting component E: Magnet

Claims

1. A ratchet wrench, comprising: A wrench body has a wrench front and a wrench back located on opposite sides, and a through hole extending through the wrench front and the wrench back along an axial direction; an inner center member extends along the axial direction and has a first end, a supporting portion extending from the first end along the axial direction, and a central portion extending from the supporting portion along the axial direction. The first end has a first end face extending in a radial direction, the supporting portion has a second end face extending in the radial direction, and the central portion has a central end opposite to the first end. The inner center member is inserted into the through hole along the axial direction, and the first end face abuts against the wrench front. The inner surface of the through hole abuts against the outer surface of the supporting portion in a radial direction. The central portion has a locking ring surface. The material of the inner center member is non-magnetic. An outer ring component has an outer ring component through hole, the outer ring component through hole corresponding to the shape of the locking ring surface, the outer ring component extends along the axial direction and has a second end and a third end, the third end extends radially outward with a third end face, there is an outer ring surface between the second end and the third end, the outer ring surface is provided with a plurality of teeth, the third end extends radially inward with an inner concave surface, the outer ring component is fitted onto the locking ring surface through the outer ring component through hole and is locked with the center portion, and the second end is radially positioned between the inner center component and the wrench body, and the second end abuts against the second end face, the third end face abuts against the back of the wrench, and the center end is adjacent to the inner concave surface; a shift paddle is disposed on the wrench body, one end of the shift paddle engages with the aforementioned teeth of the outer ring component; The central end is pressed along the axial direction, so that the central end is deformed along the radial direction to cover the concave surface. At the same time, the outer ring is limited between the second end face and the deformed central end, and the wrench body is limited between the first end face and the third end face, so that the wrench body, the inner central member and the outer ring are fixed to each other.

2. The ratchet wrench as described in claim 1, wherein, The inner central component has a recessed groove at its center, and a magnet is embedded in the groove.

3. The ratchet wrench as described in claim 1, wherein, The material of the inner core component is one of the following: SUS304 stainless steel or SUS316 stainless steel; the material of the outer ring component is one of the following: carbon tool steel, alloy tool steel or high-speed steel.

4. The ratchet wrench as described in claim 1, wherein, The concave surface sequentially includes, along the axial direction, a sloped segment extending both along the axial direction and the radial direction, a vertical segment extending along the axial direction, and a planar segment extending along the radial direction, with the deformed central end covering the planar segment, the vertical segment, and a portion of the sloped segment.

5. The ratchet wrench as described in claim 1, wherein, The deformed central end is tied into a ring shape and completely covers the concave surface in the circumferential direction.

6. The ratchet wrench as described in claim 1, wherein, The deformed central end includes a plurality of spaced-apart stamping points that extend radially and cover the concave surface.

7. The ratchet wrench as described in claim 6, wherein, The aforementioned stamping point is circular in shape.

8. The ratchet wrench as described in claim 1, wherein, The first end face has a longer radial length than the second end face, and the second end face has a longer radial length than the center portion.

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