Labor-saving wrench device

Abstract

The labor-saving wrench device comprises a lower wrench arm, a core function shell and an upper wrench arm, a front function annular frame is arranged on the front portion of the lower wrench arm, and the labor-saving wrench device further comprises a core function shell and the upper wrench arm. Due to the fact that a meshing transmission structure of the large gear and the small gear is adopted, and the number of teeth of the large gear is larger than that of teeth of the small gear, when the upper spanner arm is rotated according to the torque principle of gear transmission, large torque can be generated at the position of the core function shell through gear transmission with small force, and therefore a bolt can be easily screwed. The force required by a user during operation is greatly reduced; due to the existence of the one-way ratchet wheel bearing, rotation of the head of the bolt in the regular hexagon groove can be achieved by rotating the upper core grab handle in a reciprocating mode. The repeated operation of fixing the head of the bolt and fixing the head of the bolt by a traditional wrench is avoided, the physical strength is saved for related workers, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to a wrench, in particular to a labor-saving wrench device. Background Art

[0002] In many industrial and civil fields, bolt tightening and removal are extremely common and frequent operation tasks. Traditional wrenches often expose many limitations when facing bolts with larger specifications or higher tightening degrees. Due to the lack of an effective labor-saving transmission mechanism, users need to exert greater force to complete the operation, which not only leads to extremely high labor intensity, but also easily causes fatigue and muscle damage to operators after long-term use. In addition, in some special working conditions, such as working in narrow spaces or at heights, the greater operating force required makes the operation more difficult, and it may even be impossible to complete the task due to difficulty in applying force.

[0003] At the same time, during the operation of traditional wrenches, the fixing and rotation operations of the bolt head often require frequent switching of hand movements. For example, when tightening a bolt, one hand is required to fix the contact between the wrench head and the bolt head, and the other hand is required to perform the rotation operation. After rotating a certain angle, the fixed position needs to be readjusted to continue rotating. This repetitive operation is extremely cumbersome, seriously affecting work efficiency, and is prone to errors in complex working environments, posing challenges to the accuracy and safety of the operation.

[0004] Therefore, a better labor-saving wrench device is urgently needed on the market. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a labor-saving wrench device.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is a labor-saving wrench device: comprising a lower wrench arm, a front functional annular frame is provided at the front of the lower wrench arm, and an arc-shaped track is provided on the inner wall of the front functional annular frame;

[0007] It also includes a core function shell, the core function shell is provided with a regular hexagonal groove with an opening facing the center, and the lower outer wall of the core function shell is provided with an annular guide ring body; the core function shell is located in the front function annular frame, the outer wall of the core function shell and the inner wall of the front function annular frame are slidably matched, the annular guide ring body is located in the circular arc track, and the annular guide ring body rotates in the circular arc track; the upper outer wall of the core function shell is provided with a large gear;

[0008] It also includes an upper wrench arm, a core rotating shaft is provided at the front lower part of the upper wrench arm, a bearing is provided on the front part of the lower wrench arm, the bearing is embedded in the front part of the lower wrench arm, and the lower part of the core rotating shaft extends into the bearing; a one-way ratchet bearing is fixedly provided on the upper outer wall of the core rotating shaft, a small gear is fixedly provided on the outer wall of the one-way ratchet bearing, and the small gear is meshed with the large gear.

[0009] As an improvement, a lower core handle is provided at the rear of the lower wrench arm;

[0010] As an improvement, the extension direction of the lower wrench arm and the extension direction of the lower core handle are on the same straight line.

[0011] As an improvement, an upper core grip is provided at the rear of the upper wrench arm;

[0012] As an improvement, the extension direction of the upper wrench arm and the extension direction of the upper core handle are on the same straight line.

[0013] As an improvement, the projection of the core functional shell in a top view is circular.

[0014] As an improvement, a U-shaped bracket is provided on the front functional annular frame;

[0015] A nut is fixedly provided on the back of the U-shaped bracket, and a butterfly bolt is provided on the nut, and the stud part of the butterfly bolt and the nut are threadedly matched; a limiting hole body is provided on the front outer wall of the upper wrench arm, and the stud part of the butterfly bolt passes through the U-shaped bracket, and the end of the stud part of the butterfly bolt extends into the limiting hole body at the front of the upper wrench arm.

[0016] As an improvement, the opening of the U-shaped bracket faces downward.

[0017] As an improvement, the ends of the side wings on both sides of the U-shaped bracket are fixedly connected to the upper wall of the front functional annular frame.

[0018] The advantages of the present invention compared with the prior art are: significant labor-saving effect: due to the adoption of a meshing transmission structure of a large gear and a small gear, and the number of teeth on the large gear is greater than that on the small gear, according to the torque principle of gear transmission, when the upper wrench arm is rotated, a large torque can be generated at the core functional housing through gear transmission with a small force, thereby easily tightening the bolts, greatly reducing the force required for the user to operate, reducing labor intensity, and being particularly suitable for handling bolts of larger specifications or higher tightening degrees, making the originally difficult tightening or disassembly work easier.

[0019] The existence of the one-way ratchet bearing enables the head of the bolt in the regular hexagonal groove to rotate by reciprocating the upper core handle, avoiding the repeated operation of the traditional wrench in fixing the head of the bolt and fixing the head of the bolt, which saves physical strength and improves work efficiency for the relevant staff.

[0020] Easy to place and carry: When not in use, the U-shaped bracket, nut, butterfly bolt and limit hole body can limit the rotation between the lower and upper wrench arms, making it easy to place stably. This design can prevent unnecessary rotation of the various parts of the wrench during storage or carrying, so that the wrench can be placed more neatly in places such as tool boxes, and it is also convenient to carry to avoid damage or inconvenience caused by loose parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional structure diagram of a labor-saving wrench device of the present invention is shown in FIG. Figure 1 .

[0022] Figure 2 The three-dimensional structure diagram of a labor-saving wrench device of the present invention is shown in FIG. Figure 2 .

[0023] Figure 3 It is a schematic diagram of the internal three-dimensional structure of a labor-saving wrench device of the present invention.

[0024] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure at point A in the middle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0029] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In conjunction with the accompanying drawings, a labor-saving wrench device comprises a lower wrench arm 1, a front functional annular frame 2 is provided at the front of the lower wrench arm 1, and an inner wall of the front functional annular frame 2 is provided with an arc track 3; a lower core handle 4 is provided at the rear of the lower wrench arm 1; an extension direction of the lower wrench arm 1 and an extension direction of the lower core handle 4 are on the same straight line.

[0031] It also includes a core function shell 5, the projection of the core function shell 5 in the top view is circular, the core function shell 5 is provided with a regular hexagonal groove 6 with an opening, and the lower outer wall of the core function shell 5 is provided with an annular guide ring body 7; the core function shell 5 is located in the front function annular frame 2, the outer wall of the core function shell 5 and the inner wall of the front function annular frame 2 are slidably matched, the annular guide ring body 7 is located in the circular arc track 3, and the annular guide ring body 7 rotates in the circular arc track 3; the upper outer wall of the core function shell 5 is provided with a large gear 8.

[0032] It also includes an upper wrench arm 9, a core rotating shaft 10 is provided at the front lower part of the upper wrench arm 9, a bearing 11 is provided on the front part of the lower wrench arm 1, the bearing 11 is embedded in the front part of the lower wrench arm 1, and the lower part of the core rotating shaft 10 extends into the bearing 11; a one-way ratchet bearing 12 is fixedly provided on the upper outer wall of the core rotating shaft 10, a small gear 13 is fixedly provided on the outer wall of the one-way ratchet bearing 12, and the small gear 13 is meshed with the large gear 8; an upper core handle 14 is provided at the rear part of the upper wrench arm 9; the extension direction of the upper wrench arm 9 and the extension direction of the upper core handle 14 are on the same straight line.

[0033] A U-shaped bracket 15 is provided on the front functional annular frame 2, and the opening of the U-shaped bracket 15 faces downward. The ends of the side wings on both sides of the U-shaped bracket 15 are fixedly connected to the upper wall of the front functional annular frame 2, and a nut 16 is fixedly provided on the back of the U-shaped bracket 15. A butterfly bolt 17 is provided on the nut 16, and the stud part of the butterfly bolt 17 and the nut 16 are threadedly matched; a limiting hole body 18 is provided on the front outer wall of the upper wrench arm 9, and the stud part of the butterfly bolt 17 passes through the U-shaped bracket 15, and the end of the stud part of the butterfly bolt 17 extends to the limiting hole body 18 at the front of the upper wrench arm 9.

[0034] Initial state, when not in use:

[0035] At this time, the U-shaped bracket 15 on the front functional annular frame 2 plays a key role. The ends of the flanks on both sides of the U-shaped bracket 15 are firmly connected to the upper wall of the front functional annular frame 2, and a nut 16 is fixed on its back, and a butterfly bolt 17 is screwed on the nut 16.

[0036] The stud part of the butterfly bolt 17 passes through the U-shaped bracket 15, and its end extends into the limiting hole 18 at the front of the upper wrench arm 9. In this way, the mutual rotation between the lower wrench arm 1 and the upper wrench arm 9 is effectively limited, so that the wrench can be stably placed in a suitable position to avoid inconvenience or danger caused by its random rotation.

[0037] Preparation stage:

[0038] When the labor-saving spanner device needs to be used, first hold the butterfly bolt 17 by hand, and then twist the butterfly bolt 17 counterclockwise. During the twisting process, the butterfly bolt 17 will gradually be screwed out of the limiting hole body 18 at the front of the upper spanner arm 9 until it is completely separated from the limiting hole body 18.

[0039] Next, align the regular hexagonal groove 6 on the core function housing 5 with the bolt head that needs to be loosened. Since the core function housing 5 is located in the front function annular frame 2, and its outer wall is slidably matched with the inner wall of the front function annular frame 2, and the annular guide ring body 7 of the lower outer wall of the core function housing 5 is located in the arc track 3 of the inner wall of the front function annular frame 2 and can rotate, it is relatively convenient to adjust the position of the core function housing 5 so that the regular hexagonal groove 6 is accurately aligned with the bolt head, and then the bolt head is embedded in the regular hexagonal groove 6.

[0040] Use operation phase:

[0041] The user holds the lower core handle 4 at the rear of the lower wrench arm 1 with one hand to keep the lower wrench arm 1 in a stable and immobile state. This step is very critical because the lower wrench arm 1 is the basic support part of the entire operation. Only when it is stable can the effectiveness and accuracy of the subsequent rotation operation be guaranteed.

[0042] The other hand holds the upper core handle 14 at the rear of the upper wrench arm 9, and then starts to rotate the upper wrench arm 9. During the rotation of the upper wrench arm 9, the core rotating shaft 10 at the lower front portion thereof can rotate stably due to the bearing 11 provided at the front portion of the lower wrench arm 1. The bearing 11 has been previously embedded in the front portion of the lower wrench arm 1, and the lower portion of the core rotating shaft 10 extends into the bearing 11. This structural design ensures the stability of the mutual rotation and reduces friction and shaking.

[0043] As the upper lever arm 9 rotates, the one-way ratchet bearing 12 fixed to the upper outer wall of the core rotating shaft 10 also rotates, and the pinion 13 fixed to the outer wall of the one-way ratchet bearing 12 also rotates synchronously. Since the pinion 13 is meshed with the large gear 8 provided on the upper outer wall of the core functional housing 5, when the pinion 13 rotates, the large gear 8 will rotate accordingly. And because the number of teeth of the large gear 8 is greater than the number of teeth of the pinion 13, according to the gear transmission principle, a labor-saving effect will be produced during the power transmission process, so that the core functional housing 5 can be rotated more easily.

[0044] Due to the special structure of the one-way ratchet bearing 12, when the user reciprocates the upper core handle 14, the continuous rotation of the bolt head in the regular hexagonal groove 6 can be achieved. By reciprocating the upper core handle 14, the one-way ratchet bearing 12 can also ensure the one-way effective transmission of power, thereby achieving the rotation of the bolt head in the regular hexagonal groove 6, so that the bolt can be continuously loosened or tightened, and finally completing the operation task of the bolt.

[0045] The labor-saving effect is remarkable: due to the meshing transmission structure of the large gear 8 and the small gear 13, and the number of teeth of the large gear 8 is greater than that of the small gear 13, according to the torque principle of gear transmission, when the upper wrench arm 9 is rotated, a large torque can be generated at the core functional housing 5 through gear transmission with a small force, thereby easily tightening the bolts, greatly reducing the force required for the user to operate, reducing labor intensity, and is particularly suitable for handling bolts of larger specifications or higher tightening degrees, making the originally difficult tightening or disassembly work easier.

[0046] The existence of the one-way ratchet bearing 12 enables the head of the bolt in the regular hexagonal groove 6 to rotate by reciprocating the upper core handle 14. This avoids the repeated operation of the traditional wrench in fixing the head of the bolt and fixing the head of the bolt, which saves physical strength for the relevant staff and improves work efficiency.

[0047] Easy to place and carry: When not in use, the U-shaped bracket 15, nut 16, butterfly bolt 17 and limit hole 18 can limit the mutual rotation between the lower wrench arm 1 and the upper wrench arm 9, so as to facilitate stable placement. This design can prevent unnecessary rotation of the various parts of the wrench during storage or carrying, so that the wrench can be placed more neatly in a tool box or the like, and is also convenient for carrying to avoid damage or inconvenience caused by loose parts.

[0048] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A labor-saving wrench device, characterized in that: It comprises a lower wrench arm (1), the front of which is provided with a front functional annular frame (2), and the inner wall of the front functional annular frame (2) is provided with an arc-shaped track (3); It also comprises a core function shell (5), the core function shell (5) is provided with a regular hexagonal groove (6) with an opening facing in the direction, and the lower outer wall of the core function shell (5) is provided with an annular guide ring body (7); the core function shell (5) is located in the front function annular frame (2), the outer wall of the core function shell (5) and the inner wall of the front function annular frame (2) are slidably matched, the annular guide ring body (7) is located in the circular arc track (3), and the annular guide ring body (7) rotates in the circular arc track (3); the upper outer wall of the core function shell (5) is provided with a large gear (8); The invention also comprises an upper wrench arm (9), wherein a core rotating shaft (10) is provided at the front lower part of the upper wrench arm (9), a bearing (11) is provided at the front part of the lower wrench arm (1), the bearing (11) is embedded in the front part of the lower wrench arm (1), and the lower part of the core rotating shaft (10) extends into the bearing (11); a one-way ratchet bearing (12) is fixedly provided on the upper outer wall of the core rotating shaft (10), a small gear (13) is fixedly provided on the outer wall of the one-way ratchet bearing (12), and the small gear (13) is meshed with the large gear (8).

2. A labor-saving wrench device according to claim 1, characterized in that: A lower core handle (4) is provided at the rear of the lower wrench arm (1).

3. A labor-saving wrench device according to claim 2, characterized in that: The extension direction of the lower wrench arm (1) and the extension direction of the lower core handle (4) are on the same straight line.

4. The labor-saving wrench device according to claim 1, characterized in that: An upper core handle (14) is provided at the rear of the upper wrench arm (9).

5. The labor-saving wrench device according to claim 4, characterized in that: The extension direction of the upper wrench arm (9) and the extension direction of the upper core handle (14) are on the same straight line.

6. The labor-saving wrench device according to claim 1, characterized in that: The projection of the core functional housing (5) in a top view is circular.

7. The labor-saving wrench device according to claim 6, characterized in that: The front functional annular frame (2) is provided with a U-shaped bracket (15); A nut (16) is fixedly provided on the back of the U-shaped bracket (15), and a butterfly bolt (17) is provided on the nut (16), and the stud portion of the butterfly bolt (17) and the nut (16) are threadedly matched; a limiting hole body (18) is provided on the front outer wall of the upper spanner arm (9), and the stud portion of the butterfly bolt (17) passes through the U-shaped bracket (15), and the end of the stud portion of the butterfly bolt (17) extends into the limiting hole body (18) at the front of the upper spanner arm (9).

8. The labor-saving wrench device according to claim 7, characterized in that: The opening of the U-shaped bracket (15) faces downward.

9. The labor-saving wrench device according to claim 8, characterized in that: The ends of the side wings on both sides of the U-shaped bracket (15) are fixedly connected to the upper wall of the front functional annular frame (2).

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