One-way ratchet wrench

Abstract

This utility model provides a one-way ratchet wrench, comprising a wrench body, a ratchet head, and a rotating assembly. The wrench body has a head and a handle portion connecting to the head, with the head forming a through hole. The ratchet head has a socket hole penetrating both its top and bottom surfaces, and the ratchet head passes through the through hole in the head of the wrench body. The rotating assembly is disposed between the head of the wrench body and the ratchet head, and has a ratchet tooth portion and an actuating part connecting to the ratchet tooth portion. The actuating part is located between the ratchet tooth portion and the head of the wrench body. Based on the displacement of the actuating part relative to the ratchet tooth portion, the ratchet head can rotate in a single direction relative to the wrench body. Therefore, the one-way ratchet wrench achieves unidirectional rotation with a simplified structure, offering advantages such as simple assembly and low manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the technical field of ratchet wrench structures, and in particular to a one-way ratchet wrench, which is composed of a wrench body, a ratchet head and a rotating assembly to form a ratchet wrench that can rotate in one direction. The overall structure is simple and easy to assemble. Background Technology

[0002] When working in complex mechanical structures, there is often only narrow space available for the operator, or obstacles obstructing the work area, making it difficult for the operator to continuously turn the wrench to smoothly tighten or loosen nuts, thus often resulting in a significant amount of time wasted. The characteristic of a ratchet wrench is that it can rotate in one direction while simultaneously free-spinning in the opposite direction, allowing the operator to complete the work with more fluid movements even in situations with limited space.

[0003] To increase the convenience of ratchet wrenches, most are designed for bidirectional use. Users can change the meshing position of the ratchet block and the ratchet gear simply by operating the lever, thus switching the direction of rotation. Patent Publication No. 1807712 discloses a ratchet wrench structure comprising a body, ratchet, teeth, a steering assembly, a limiting member, and a first ring. The limiting member is integrated with the body, teeth, and steering assembly. Users can change the rotation direction of the ratchet wrench by operating the steering assembly. Patent Publication No. 1865327 discloses a double-tooth unidirectional ratchet wrench structure comprising a wrench body, a braking unit, and a ratchet. The design of a first and a second toothed component in the braking unit improves the accuracy of their operation, thereby achieving a small-angle tooth-changing drive function.

[0004] However, these bidirectional ratchet wrenches all require complex structural designs, which not only cause difficulties in manufacturing but also present challenges in assembling the tiny parts. Therefore, the applicant has been considering providing a ratchet wrench with a simplified structure. Utility Model Content

[0005] In view of the many defects of the existing ratchet wrenches, the main purpose of this utility model is to provide a one-way ratchet wrench, which has a rotating group between the wrench body and the ratchet head, eliminating the need for a complex switching structure. The rotating group can limit the rotation direction of the ratchet head. In this way, the one-way ratchet wrench can achieve the function of rotating in one direction with a simplified structure.

[0006] To achieve the aforementioned main objectives, this utility model provides a one-way ratchet wrench, comprising a wrench body, a ratchet head, and a rotating assembly. The wrench body has a head and a handle portion connecting to the head, with the head forming a through hole. The ratchet head has a socket hole penetrating both its top and bottom surfaces, and the ratchet head passes through the through hole in the head of the wrench body. The rotating assembly is disposed between the head of the wrench body and the ratchet head, and includes a ratchet tooth portion and an actuating part connecting to the ratchet tooth portion. The actuating part is located between the ratchet tooth portion and the head of the wrench body, and according to the displacement of the actuating part relative to the ratchet tooth portion, the ratchet head can rotate in a single direction relative to the wrench body.

[0007] Through the aforementioned technical features, the rotating assembly is located between the wrench body and the ratchet head, and the rotating assembly has a modular structure, making the entire assembly process quite convenient and quick. This allows the ratchet head to achieve unidirectional rotation via the rotating assembly. The moving part of the rotating assembly of this invention only displaces when the ratchet head rotates in a specific direction. When the ratchet head does not rotate in the specific direction, the moving part and the ratchet teeth are locked together and cannot move, thus restricting the rotation direction of the ratchet head. This allows the user to smoothly complete the operation of tightening or loosening nuts even in situations with limited space. Furthermore, this invention has a simple structure, effectively reducing manufacturing costs.

[0008] Preferably, the inner circumferential surface of the wrench body head also forms a stop section, the ratchet head is surrounded by the stop section, and the side of the rotating assembly abuts against the stop section. Therefore, when the ratchet head passes through the head of the wrench body, one end will exceed the position of the stop section, exposing the snap-fit ​​structure formed around the socket hole to lock the nut, while the stop section is responsible for limiting the rotation assembly, allowing the rotation assembly to move smoothly.

[0009] Preferably, the one-way ratchet wrench further includes a positioning plate and a positioning buckle. The outer peripheral surface of the positioning plate forms a first positioning groove, and the inner peripheral surface of the head of the wrench body forms a second positioning groove. After the ratchet head passes through the through hole, the positioning plate sleeves one end of the ratchet head and abuts against the side of the rotating assembly. The positioning buckle is set in the first positioning groove and the second positioning groove to restrict the position of the ratchet head and the rotating assembly in the through hole. Therefore, the positioning buckle is simultaneously embedded in the positioning plate and the wrench body, and one end of the ratchet head is surrounded by the positioning plate, exposing the snap-fit ​​structure formed around the socket hole to lock the nut, indicating that both sides of the one-way ratchet wrench can be used.

[0010] Preferably, the ratchet portion of the rotating assembly has multiple ratchet teeth disposed on the outer peripheral surface of the ratchet head. The actuating portion has multiple rolling elements and multiple elastic elements, with each elastic element disposed on any ratchet tooth, and the rolling elements disposed at one end of each elastic element. These rolling elements may or may not abut against adjacent ratchet teeth and the head of the wrench body. Therefore, the rolling elements and elastic elements of the actuating portion are displaced along the outline of the ratchet teeth of the ratchet portion, allowing the ratchet head to rotate in a specific direction to achieve unidirectional limitation.

[0011] Preferably, the rolling elements of the actuating part are divided into large and small sizes, with a large rolling element paired with a small rolling element disposed at one end of any elastic element. Therefore, the configuration of two sizes of rolling elements enhances the braking force, making it more difficult for the ratchet head to turn in a non-specific direction, and preventing the rolling elements from reversing due to wear.

[0012] Detailed construction, features, assembly, and usage of the one-way ratchet wrench provided by this utility model will be described in the subsequent detailed description of the embodiments. However, those skilled in the art will understand that these detailed descriptions and the specific embodiments listed for implementing this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model;

[0014] Figure 2 This is an exploded perspective view of the present invention;

[0015] Figure 3 This is a cross-sectional view of the present invention, showing the ratchet head in both non-rotating and non-rotating states;

[0016] Figure 4 This is a cross-sectional view of the present invention, showing the form in which the ratchet head rotates relative to the wrench body.

[0017] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0018] 10-One-way ratchet wrench;

[0019] 20 - Wrench body;

[0020] 21-Head;

[0021] 22-Handle;

[0022] 23-Through hole;

[0023] 24: Stop section;

[0024] 25 - Second positioning groove;

[0025] 30-Ratchet Head;

[0026] 31 - Socket hole;

[0027] 40-Rotation group;

[0028] 41-Ratchet;

[0029] 411-Ratchet;

[0030] 412 - Reception slot;

[0031] 42-Motion section;

[0032] 421 - Rolling parts;

[0033] 422 - Elastic element;

[0034] 50-Positioning plate;

[0035] 51-First positioning slot;

[0036] 60-Positioning buckle. Detailed Implementation

[0037] The applicant first clarifies that in the embodiments and accompanying drawings described below, the same reference numerals denote the same or similar elements or their structural features. It should be noted that the elements and structures in the drawings are for illustrative purposes and are not drawn to scale or in quantity; features of different embodiments may be used interchangeably if feasible in practice. Secondly, when it is mentioned that one element is disposed on another element, it means that the element is directly disposed on the other element, or indirectly disposed on the other element; that is, one or more other elements are disposed between the two elements. Conversely, when it is stated that one element is "directly" disposed on another element, it means that no other elements are disposed between the two elements.

[0038] Please see Figures 1 to 3 The one-way ratchet wrench 10 of this utility model mainly includes a wrench body 20, a ratchet head 30, and a rotating assembly 40.

[0039] The wrench body 20 may be an integrally formed structure, for example, having a head 21 and a handle 22. One end of the handle 22 is connected to the head 21. A through hole 23 is formed in the head 21, penetrating the top and bottom surfaces of the head 21. At the position of the through hole 23, i.e., the inner circumferential surface of the head 21, a stop section 24 and a second positioning groove 25 are also formed. The stop section 24 and the second positioning groove 25 are respectively located at the two ends of the head 21.

[0040] The ratchet head 30 is cylindrical and hollow. The ratchet head 30 has a socket 31 that runs through the top and bottom surfaces of the ratchet head 30. A snap-fit ​​structure is formed around the socket 31, which can be, for example, hexagonal or dodecagonal, to conform to the shape of most nuts. The one-way ratchet wrench 10 can engage various nuts to perform locking or unlocking actions.

[0041] The rotating assembly 40 has a ratchet portion 41 and an actuating portion 42, which are assembled together. The ratchet portion 41 has a plurality of ratches 411. When the rotating assembly 40 is engaged with the ratchet head 30, these ratches 411 are disposed on the outer peripheral surface of the ratchet head 30 and are arranged at equal intervals with the ratchet head 30 as the center. The actuating portion 42 includes a plurality of rolling elements 421 and a plurality of elastic elements 422. The rolling elements 421 can be, for example, rollers or balls, and the rolling elements are available in two sizes. The elastic elements 422 can be, for example, springs. Each ratchet 411 of the ratchet portion 41 forms a receiving groove 412, in which the elastic element 422 is received and fixed. A large-sized rolling element 421 and a small-sized rolling element 421 are provided at the end of the elastic element 422 that is not fixed.

[0042] The one-way ratchet wrench 10 of this utility model also includes a positioning plate 50 and a positioning buckle 60. The positioning plate 50 has a ring-shaped hollow structure, and its outer circumferential surface forms a first positioning groove 51. The positioning buckle 60 can be, for example, a C-shaped buckle, and its size needs to be able to fit perfectly into the first positioning groove 51 of the positioning plate 50 and the second positioning groove 25 of the head 21 of the wrench body 20.

[0043] During assembly, the rotating assembly 40 is first attached to the ratchet head 30. The rotating assembly 40 can be directly fitted onto the outer circumferential surface of the ratchet head 30 and is located in the middle of the ratchet head 30. Since the height of the rotating assembly 40 is less than the height of the ratchet head 30, both ends of the ratchet head 30 protrude from both ends of the rotating assembly 40, and the rotating assembly 40 and the ratchet head 30 are linked. In addition, the ratchet head 30 with the rotating assembly 40 attached is inserted into the through hole 23 of the wrench body 20. The side of the rotating assembly 40 abuts against the stop section 24 on the inner side of the head 21 of the wrench body 20, and one end of the ratchet head 30 extends beyond the stop section 24 and is surrounded by the stop section 24, exposing the snap-fit ​​structure around the socket 31. In this way, the position of one end of the ratchet head 30 and the rotating assembly 40 is restricted by the stop section 24. At this time, the rotating assembly 40 is positioned between the head 21 of the wrench body 20 and the ratchet head 30. The actuating part 42 of the rotating assembly 40 is positioned between the ratchet part 41 and the inner circumferential surface of the head 21 of the wrench body 20. When the ratchet head 30 is not rotating, the rolling elements 421 abut against the ratchet 411 of the partition wall and the inner circumferential surface of the head 21 of the wrench body 20.

[0044] Next, the positioning buckle 60 is engaged in the second positioning groove 25 of the head 21 of the wrench body 20, and then the positioning plate 50 is installed. The positioning plate 50 covers the other end of the ratchet head 30 and abuts against the side of the rotating assembly 40. At the same time, the positioning buckle 60 is engaged in the first positioning groove 51 of the positioning plate 50. At this time, the outer side of the positioning buckle 60 is engaged in the second positioning groove 25, and the inner side is engaged in the first positioning groove 51. In this way, the one-way ratchet wrench 10 is assembled. The head 21 of the wrench body 20 and the positioning plate 50 are fixed to each other by the positioning buckle 60. With the positioning plate 50 and the positioning buckle 60, plus the stop section 24 of the wrench body 20, this configuration can restrict the position of the ratchet head 30 and the rotating assembly 40 in the through hole 23, preventing the ratchet head 30 and the rotating assembly 40 from easily disengaging from the through hole 23.

[0045] Please refer to this again. Figure 4 In actual operation, the user attaches the ratchet head 30 of the one-way ratchet wrench 10 to the nut and can then start rotating the one-way ratchet wrench 10 to tighten or loosen the nut. When the ratchet head 30 rotates relative to the wrench body 20, it drives the rotating assembly 40 to rotate together. The two rolling elements 421 of the actuating part 42, which were originally in contact with the head 21 of the wrench body 20, are now pushed by the head 21 of the wrench body 20. At the same time, the elastic element 422 connected to the rolling elements 421 is compressed with one end of the ratchet tooth 411 as the fulcrum. At this time, the two rolling elements 421 are displaced along the inclined surface of the ratchet tooth 411 of the ratchet part 41. A gap is thus created between these rolling elements 421 and the inner circumferential surface of the head 21 of the wrench body 20, allowing the ratchet head 30 to rotate smoothly.

[0046] The above description uses a single range of ratchet 411, rolling element 421, and elastic element 422. However, in actual operation, the user will usually rotate the one-way ratchet wrench 10 continuously. All the rolling elements 421 of the moving part 42 of the rotating assembly 40 will simultaneously compress the elastic element 422, so that there is a full circle of gap between the rotating assembly 40 and the inner circumferential surface of the head 21 of the wrench body 20, so that the ratchet head 30 can rotate smoothly in a specific direction until the user completes the operation of tightening or loosening the nut. However, if the user turns it in the opposite direction, the large and small rolling elements 421 of the rotating assembly 40 will simultaneously abut against the ratchet 411 and the inner circumferential surface of the head 21 of the wrench body 20, and will be forced into a tight clamping state, causing the rotating assembly 40 to jam and be unable to move, which in turn prevents the ratchet head 30 from rotating, so as to achieve the purpose of the one-way ratchet wrench 10 being able to rotate in only one direction, allowing the user to smoothly complete the action of locking or loosening the nut even in situations where space is insufficient.

[0047] Furthermore, after the ratchet head 30 passes through the through hole 23 of the wrench body 20, one end of it extends beyond the stop section 24 and exposes the locking structure. After the other end is fitted with the positioning plate 50, the locking structure is also exposed. Therefore, the nut can be locked onto the locking structure of the ratchet head 30 by either side of the one-way ratchet wrench 10. Even if the one-way ratchet wrench 10 of this utility model does not provide a mechanism for switching the rotation direction, the user can change the rotation direction of the one-way ratchet wrench 10 by flipping it.

[0048] In summary, the one-way ratchet wrench 10 provided by this utility model has at least the following advantages compared with the prior art:

[0049] 1. The one-way ratchet wrench 10 provided by this utility model mainly utilizes the combination of wrench body 20, ratchet head 30 and rotating assembly 40. Compared with the traditional ratchet wrench which has a complex ratchet mechanism and switching mechanism, this utility model has the advantages of simple structure and easy assembly, which can greatly reduce manufacturing costs and meet the requirement of one-way rotation of ratchet wrench.

[0050] 2. The one-way ratchet wrench 10 provided by this utility model allows the ratchet head 30 to rotate in a single direction through the rotating assembly 40. The ratchet tooth 41 of the rotating assembly 40 is driven by the ratchet head 30, and the actuating part 42 will be displaced due to the relative position of the ratchet tooth 41 and the head 21 of the wrench body 20, so as to restrict the ratchet head 30 to rotate only in a specific direction. The rotating assembly 40 can be a modular design, which facilitates the assembly of the one-way ratchet wrench 10.

[0051] Finally, it must be stated again that the constituent elements disclosed in the above embodiments of this utility model are merely illustrative examples and are not intended to limit the scope of protection of this utility model. Substitutions or variations of other equivalent elements should also be within the scope of protection of this utility model.

Claims

1. A one-way ratchet wrench, characterized in that, Includes: A wrench body having a head and a handle connected to the head, the head forming a through hole. A ratchet head having a socket hole extending through the top and bottom surfaces, the ratchet head passing through a through hole in the head of the wrench body; and A rotating assembly is disposed between the head of the wrench body and the ratchet head. The rotating assembly has a ratchet portion and an actuating portion connected to the ratchet portion. The actuating portion is located between the ratchet portion and the head of the wrench body. According to the displacement of the actuating portion relative to the ratchet portion, the ratchet head can rotate in a single direction relative to the wrench body.

2. The one-way ratchet wrench according to claim 1, characterized in that, The inner circumferential surface of the head of the wrench body also forms a stop section, the ratchet head is surrounded by the stop section, and the side of the rotating assembly abuts against the stop section.

3. The one-way ratchet wrench according to claim 1, characterized in that, It also includes a positioning plate and a positioning buckle. The outer peripheral surface of the positioning plate forms a first positioning groove, and the inner peripheral surface of the head of the wrench body forms a second positioning groove. After the ratchet head passes through the through hole, the positioning plate is fitted with one end of the ratchet head and abuts against the side of the rotating assembly. The positioning buckle is set in the first positioning groove and the second positioning groove to limit the position of the ratchet head and the rotating assembly in the through hole.

4. The one-way ratchet wrench according to claim 1, characterized in that, The ratchet part of the rotating assembly has multiple ratchet teeth, which are disposed on the outer peripheral surface of the ratchet head. The actuating part has multiple rolling elements and multiple elastic elements. Each elastic element is disposed on any ratchet tooth, and the rolling elements are disposed at one end of each elastic element. The rolling elements may or may not abut against the adjacent ratchet tooth and the head of the wrench body.

5. The one-way ratchet wrench according to claim 4, characterized in that, The rolling elements of the actuating part are divided into large and small sizes, with a large rolling element paired with a small rolling element set at one end of any elastic element.

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