TWI398324B - Ratchet-action open-end wrench - Google Patents

Description

Reciprocating ratchet open end wrench

The present invention relates to an open end wrench, and more particularly to a reciprocating ratchet type open end wrench.

The reciprocating ratchet type open end wrench can be referred to US Pat. No. 4,637,284, which is provided with a fixed jaw and a linearly movable movable jaw, and is further provided with an elastic member, which can be utilized when the user reciprocates the wrench. The movable 颚 slides and opens relative to the fixed 颚, and then engages the screw in one direction, and drives the screw to rotate in a disassembly or fastening direction, thereby providing convenient operation and use effect.

However, the aforementioned wrench, when the wrench reverses the return (Ratchet), is configured to simultaneously move the movable jaw toward the direction of the opening tip and the direction of the outer edge, thereby causing the width of the entire wrench head to be enlarged and the movable jaw tip to protrude. Higher than the original deep of throat, it is easy to get stuck in the surrounding objects in actual use, which is difficult to use or unusable. Today's consumers prefer to use open-end wrenches of appropriate size or smaller width, because the space inside various machines or automotive components is constantly compressed, and the parts within the machine or car assembly are also close to each other or Even when they are close to each other, assembly and disassembly of parts becomes difficult in the absence of proper space around them. When using the above-mentioned wrench, in order to obtain the reciprocating effect, the activity must be linearly slid and retracted when used, and it is necessary to have a certain space around the working environment. Used, it is not conducive to use in a narrow working environment.

In view of this, there are a number of patents such as US 5,287,777, US 5,582,082 and US 7,827,887, which provide a wrench that can be used in a narrow working environment, and at the same time have a reciprocating function. The US Patent No. 5,287,777 is similar to the US Pat. No. 7,827,887, which utilizes a pin and a curved positioning hole to provide a movable slidable function, while utilizing the curved surface of the movable cymbal to limit the sliding path of the movable cymbal to avoid any activity. Rotating; US Patent No. 5,582,082, which utilizes a pin and a linear positioning hole to provide a movable slidable function, while using the curved edges between the movable cymbal and the fixed cymbal to abut each other, thereby limiting the sliding path of the movable cymbal, And avoid the activity 颚 turn freely. Each of these wrenches is popular for use in a narrow working environment.

However, the aforementioned wrenches have additionally suffered from production problems. Each of the foregoing wrenches utilizes a curved edge or surface against the movable jaw to limit the sliding path of the movable jaw, which is quite difficult to machine, particularly the wrench described in US Pat. No. 7,827,887. The curved surface is located on the inner side of the wrench jaw, the machining tool is not easy to enter, and it is not easy to process. In addition, the partial structure in the wrench may not be made by cutting because of its shape limitation, and must be precision in actual production. Casting is not only difficult to process, but also has higher production costs, which reduces market competitiveness.

In addition to the above-mentioned problems of difficulty in processing and high cost, the aforementioned wrenches are also easily accompanied by problems of low precision. On the one hand, due to processing difficulties Difficult, the precision of processing is not easy to improve. In the other direction, the local structure of the wrench needs to be made by precision casting. The surface of the wrench or the corner of the edge of the precision casting will leave the edge material left after the film is removed, which cannot be further utilized. The cutting process is removed, which affects the precision of the wrench. In the more serious case, dust or debris may get stuck between the movable cymbal and the fixed cymbal, which affects the smoothness of the active raft.

In addition, the workpiece obtained by precision casting has the problem of low structural strength of the material, and the above-mentioned wrench needs to be produced by precision casting due to structural limitation, which will accompany the problem that the structural strength of the wrench is low and the durability is low.

Therefore, if the ratchet effect can be considered at the same time, and the fixed width of the conventional open-end wrench is used, or it is better to only add a small width, and it is easy to process and has high strength, it is the gospel of the user.

The main object of the present invention is to provide a reciprocating ratchet type open end wrench which can be used by a user in a narrow working environment, and at the same time has the characteristics of being relatively easy to manufacture.

To achieve the above object, the present invention provides a reciprocating ratchet type open end wrench comprising a body, a working portion, a sliding device and an elastic member.

The body has a handle, at least one head and a fixed jaw connected to one end of the handle, the fixing jaw extending from the head. The working portion has at least one binding arm and a movable jaw, the binding arm abuts against the head, so that the movable jaw forms a jaw with the fixed jaw. The sliding device includes a sliding slot and a sliding The sliding slot is formed on one of the head and the coupling arm, and the sliding portion is fixed to the other of the head and the coupling arm, and the sliding portion is slidably disposed on the sliding slot to enable the working portion The main body is slidable along the sliding slot, and is slid between a first position and a second position. When the working portion moves toward the first position, the size of the jaw is reduced, and the sliding slot is curved. The arc center of the chute is located outside the head, and the arc center of the chute is located on a side of the body away from the movable jaw. The sliding portion has a non-single circular cross section, so that the sliding portion cannot be integrally Rotating in the chute, the non-single circular cross section is non-circular as a whole, and the non-single circular cross section includes at least one cross-sectional area, and all of the cross-sectional areas constitute a non-circular cross section as a whole. The elastic member abuts between the body and the working portion to provide an elastic force, so that the working portion has a tendency to move toward the first position.

Thereby, the invention can be used for the user to be clamped on the screw and reciprocally rotated, and the working part does not need to be excessively slid to both sides, so that the screw can be idling, which can be conveniently used by the user in a narrow space, and at the same time, The invention has the structural shape which is simple and easy to process, and the invention has the advantages of being easy to produce, controlling the cost, and improving the precision and the structural strength, and the like.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1 to FIG. 4, the present invention provides a reciprocating ratchet type open end wrench having a jaw for a user to clamp a screw or a nut or the like with a jaw clamp, and further reciprocatingly Turn, you can use the invention to drive the snail The firmware rotates in a single direction for easy removal or screwing of the screws. In the present embodiment, the reciprocating ratchet type open end wrench of the present invention comprises a body 1, a working portion 2, a sliding device 3 and an elastic member 4.

The body 1 has a handle portion 11, a head portion 12 and a fixing jaw 13 connected to one end of the handle portion 11. The fixing jaw 13 extends from the head portion 12 to make the head portion 12 It is connected between the handle portion 11 and the fixing cymbal 13 , wherein the handle portion 11 is further away from the end of the head to further assemble the grip or open the hanging hole for the user to conveniently hold or hang. The fixing jaw 13 of the body may be further formed with a recess 131, and the head 12 of the body may form a slot 121 outside. The thickness of the fixing cymbal 13 may be greater than the thickness of the head 12 such that the body 1 forms a stepped surface on one side or as shown on both sides, and the step surface is located between the fixed cymbal 13 and the head 12.

The working part 2 has two binding arms 21 and a movable cymbal 22, as shown in FIG. 2 and FIG. 3, the two binding arms 21 abut against the head 12, such that the head 12 is located between the two binding arms 21. The movable jaw 22 is coupled to one side of the two coupling arms 21 such that the movable jaws 22 and the fixed jaws 13 are opposed to each other to form a jaw for clamping the screw 5 or the like into the jaws. The movable portion 22 of the working portion may further form another groove 221, so that the movable groove 221 and the fixed groove 131 face each other, and can be used to clamp the corner of the polygonal column such as the head of the screw 5. ,As shown in Figure 4. The two coupling arms 21 are each formed with a fixing hole 211.

In this embodiment, the working portion 2 has two coupling arms 21 to clamp the head portion 12 between the coupling arms 21, so as to prevent external dust or debris from invading the card. In the head 12, however, the present invention may alternatively have only a single binding arm in the working portion, or instead have two heads formed in the body, and the binding arm may be clamped between the two heads. .

The sliding device 3 includes a sliding slot 31 and a sliding portion. The sliding slot 31 is formed on the head portion 12. The sliding portion is fixed to the coupling arm 21, and the sliding portion has a non-single circular cross section. The cross-section of the shape is non-circular as a whole, and the non-single circular cross-section includes at least one cross-sectional area, and all of the cross-sectional areas are non-circular in shape as a whole. In more detail, the sliding portion includes a slider 321 and a fixing pin 322. The slider 321 is slidably disposed in the sliding slot 31. The slider 321 is formed with a through hole 323, and the fixing pin 322 is disposed. The through hole 323 is inserted into the fixing hole 211 of the engaging arm 21 of the working portion, the sliding portion is slidably disposed on the sliding slot 31, and the working portion 2 is slidable relative to the body 1 along the sliding slot 31. The 321 is extended in an arc shape so that the sliding portion has a non-single circular cross section (in the embodiment, the sliding portion has only one cross-sectional area, the cross-sectional area is non-circular as a whole), and the sliding portion is not integral. The ground is free to rotate in the chute 31. It should be noted that the fixing pin 322 is fixed to the slider 321 and the binding arm 21 of the working portion 2 at the same time, so that the working portion 2 cannot rotate freely with respect to the slider 321 , and preferably, the through hole 323 can be further The fixing pin 322 and the fixing hole 211 have a non-circular cross section. The sliding slot 31 extends in an arc shape, and the arc center 311 of the sliding slot 31 is located outside the head, as shown in FIG. 4, and the arc center 311 of the sliding slot is located on a side of the body 1 away from the movable jaw 22, so that When the working portion 2 and the movable jaw 22 move along the sliding slot 31, the jaws will change in size to be open.

The elastic member 4 is abutted between the body 1 and the working portion 2, and more specifically, the elastic member 4 can be received in the slot 121 of the head and pushed against the working portion 2.

Referring to FIG. 4 and FIG. 5 , the sliding portion can be slid along the sliding slot 31 , and the sliding portion is a coupling arm 21 fixed to the working portion, so that the working portion 2 can be arc-shaped together with the sliding portion. Sliding to slide between the first position and the second position. Referring to FIG. 4, a width direction is defined by the jaws. When the working portion 2 is in the first position, the jaws can be clamped to the screw 5 or the like. The working portion 2 and the fixed jaw 13 and the head 12 are The sides that are apart from each other have an initial width Do. Referring to FIG. 5, the working portion 2 can be moved along the sliding slot 31 in an arc shape toward the second position, so that the screw 5 can just flash over the fixed jaw 13 and the movable jaw 22, and can be freely rotated in the jaw. The working portion 2 and the fixed cymbal 13 and the head 12 have a maximum width Dm away from each other. In the present invention, the difference between the maximum width Dm and the initial width Do may be less than 10% of the initial width Do. Therefore, when the invention is used for the user to use, the working portion 2 does not need to be excessively slid and retracted to both sides, that is, the screw 5 can be idling, and the user can reverse the rotation to drive the screw 5 Rotating, when the invention is reciprocated, the screw 5 is rotated in a single direction, and can be used by the user in a narrow space, and has an excellent use effect.

Referring to FIG. 4, the elastic member 4 abuts against the working portion 2, so that the working portion 2 has a tendency to move to the first position, so that the working portion 2 can move to the first position when it is not subjected to an external force or is not abutted. The binding arm 21 can be abutted against the step surface and The width between the working portion 2, the fixed jaw 13 and the head portion 12 is reduced to the original initial width Do.

In this embodiment, the chute 31 is formed on the head portion 12, and the sliding portion is fixed to the joint arm 21. In other possible embodiments of the present invention, the chute may be formed on the joint arm and slide. The portion is fixed to the head. It should be noted that in this case, the fixing hole in the embodiment should be removed from the coupling arm, and the head portion can be fixed to the sliding portion for assembly or fixed, or the sliding portion can be slid by other means. The part is fixed to the head.

Referring to FIG. 6 to FIG. 8 , in the second embodiment of the present invention, the structure is substantially the same as that of the previous embodiment, but the sliding portion can be changed to the two pins 324, and the respective binding arms 21 of the working portion are formed correspondingly. The two fixing holes 211 are respectively disposed on the sliding slot 31 and are respectively inserted into one of the fixing holes 211 so that the working portion 2 can still be curved along the sliding slot 31 between the first position and the second position. Sliding, as shown in FIG. 8 and FIG. 9; wherein, in the embodiment, the two pins 324 may each have a circular cross section, and the two pins 324 are regarded as a sliding portion as a whole, and are still non-singular as a whole. a circular cross section (in the embodiment, the sliding portion has a plurality of (two) separated cross-sectional areas, and the cross-sectional areas constitute a non-circular cross section as a whole), so that the sliding portion cannot be integrally slid The slot 31 is free to rotate, and whether the two pins 324 can be rotated in the chute 31 or whether it can be rotated relative to the working portion 2, no need to be limited, so that the second embodiment of the present invention is more easy to produce and assemble. specialty.

Summarizing the above embodiments, the present invention has an extremely compact structure, and the parts are The structure is extremely easy to be applied to various processing methods for manufacturing, in particular, in the present invention, it is not necessary to form an arc-shaped abutting surface, and only an arc-shaped sliding groove needs to be formed, and the sliding groove can also penetrate the head. The invention can be applied to various processing methods, and the manufacturer can optionally manufacture the processing method, and can easily control the precision of the product and the production cost. Secondly, the invention can be used by the manufacturer to select a processing method with strong structural strength of the material. Such as stamping and cutting, the product can have better structural strength.

In summary, the present invention has a streamlined structural shape, thereby achieving a multi-faceted improvement in production process, cost control, precision, and structural strength, and is indeed a progressive effect, in accordance with the patent requirements of the national patent law, In the case of filing a patent application in accordance with the law, it is really sensible to ask the bureau to approve the patent as soon as possible.

Do‧‧‧Initial width

22‧‧‧Events

Dm‧‧‧Max width

1‧‧‧ Ontology

11‧‧‧ handle

12‧‧‧ head

121‧‧‧Slots

13‧‧‧Fixed

131‧‧‧ Groove

2‧‧‧Working Department

21‧‧‧Binding arm

211‧‧‧Fixed holes

221‧‧‧ Groove

3‧‧‧Sliding device

31‧‧‧Chute

311‧‧‧Arc heart

321‧‧‧ Slider

322‧‧‧fixed pin

323‧‧‧Perforation

324‧‧‧Latch

4‧‧‧Flexible parts

5‧‧‧Spiral firmware

Figure 1 is a perspective view of a first embodiment of the present invention.

Figure 2 is an exploded perspective view of the first embodiment of the present invention.

Figure 3 is a side elevational view of a first embodiment of the present invention.

Figure 4 is a front elevational view of the first embodiment of the present invention.

Fig. 5 is a schematic view showing the operation of the first embodiment of the present invention.

Figure 6 is an exploded perspective view of a second embodiment of the present invention.

Figure 7 is a side elevational view of a second embodiment of the present invention.

Figure 8 is a front elevational view of a second embodiment of the present invention.

Figure 9 is a schematic view showing the operation of the second embodiment of the present invention.

11‧‧‧ handle

12‧‧‧ head

121‧‧‧Slots

13‧‧‧Fixed

131‧‧‧ Groove

21‧‧‧Binding arm

211‧‧‧Fixed holes

22‧‧‧Events

221‧‧‧ Groove

31‧‧‧Chute

321‧‧‧ Slider

322‧‧‧fixed pin

323‧‧‧Perforation

4‧‧‧Flexible parts

Claims (9)

The utility model relates to a reciprocating ratchet type open end wrench, comprising: a body having a handle, at least one head and a fixing jaw, the head being connected to one end of the handle, the fixing jaw extending from the head; a working portion having at least one binding arm and a movable jaw, the binding arm abutting the head, the movable jaw forming a jaw with the fixed jaw; a sliding device comprising a sliding slot and a sliding portion, The sliding slot is formed on one of the head and the coupling arm, and the sliding portion is fixed to the other of the head and the coupling arm, and the sliding portion is slidably disposed on the sliding slot, so that the working portion can be opposite The body slides along the sliding slot and slides between a first position and a second position. When the working portion moves toward the first position, the size of the jaw is reduced. The sliding slot is curved, and the sliding is curved. The arc center of the groove is located outside the head, the arc center of the groove is located on a side of the body away from the movable jaw, and the sliding portion has a non-single circular cross section, so that the sliding portion cannot be integrally located in the sliding slot Free rotation in the middle, the non-single circular cross section is non-circular as a whole, The single circular cross section includes at least one cross-sectional area, and all of the cross-sectional areas are generally non-circular in cross section; an elastic member abuts between the main body and the working portion, the elastic member provides an elastic force to The working portion has a tendency to move to the first position. The reciprocating ratchet type open end wrench according to claim 1, wherein the working portion has two engaging arms, the two engaging arms abut against the head, and the head is located between the two engaging arms, and the sliding groove is formed. In the head. a reciprocating ratchet type open end wrench according to claim 2, wherein the combined arm shape The sliding portion includes two latches, and each of the latches is slidably disposed on the sliding slot, and the two latching pins are respectively inserted into one of the fixing holes. The reciprocating ratchet type open end wrench according to claim 1, wherein the fixing jaw has a thickness larger than the head portion, so that the body is formed with at least one step surface, the step surface being located between the fixed jaw and the head, When the working portion is in the first position, the binding arm abuts against the step surface. The reciprocating ratchet type open end wrench according to claim 2, wherein the fixing jaw has a thickness larger than the head portion, so that the body is formed with at least one step surface, the step surface being located between the fixed jaw and the head, When the working portion is in the first position, the binding arm abuts against the step surface. The reciprocating ratchet type open end wrench according to claim 3, wherein the fixing jaw has a thickness larger than the head portion, so that the body is formed with at least one step surface, the step surface being located between the fixed jaw and the head, When the working portion is in the first position, the binding arm abuts against the step surface. The reciprocating ratchet type open end wrench according to any one of claims 1 to 6, wherein the fixed jaw and the movable jaw each form a groove, and the two grooves face each other for clamping a corner of a polygonal column corner. The reciprocating ratchet type open end wrench according to any one of claims 1 to 6, wherein a width direction is defined by the jaw, and the jaw is adapted to be clamped to a screw when the working portion is in the first position. The working portion and the fixed cymbal and the head are separated from each other by an initial width, and the working portion moves to the second position to enable the screw to freely rotate in the jaw, the working portion With the The two sides of the fixed jaw and the head away from each other have a maximum width, and the difference between the maximum width and the initial width is less than 10% of the initial width. The reciprocating ratchet type open end wrench according to claim 7, wherein the jaw defines a width direction, and when the working portion is in the first position, the jaw is adapted to be clamped to a screw, the working portion and the working portion The two sides of the fixed jaw and the head away from each other have an initial width, and the working portion moves to the second position to enable the screw to freely rotate in the jaw, the working portion and the fixed portion The sides of the head that are away from each other have a maximum width, and the difference between the maximum width and the initial width is less than 10% of the initial width.