Bidirectional ratchet wrench
By adding a pin shaft in the middle of the pawl and adding a sliding groove under the directional twist, the problem of the long conversion force transmission point of the existing bidirectional ratchet wrench is solved, and a more relaxed and stable commutation operation is achieved, which is suitable for large-size wrenches.
Patent Information
- Application Number
- CN202422072685.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The existing bidirectional ratchet wrench has too long a commutation force conduction point without increasing the design size, which leads to difficulty in pulling, especially on large-size wrenches.
Add a pin shaft in the middle of the pawl and add a sliding groove under the direction twist. The pin shaft drives the pawl to achieve reversal, reducing the force conduction distance during reversal, and improving the simplicity and stability of operation.
It achieves that the reversal is easier and more stable without increasing the design size, meeting the adjustment needs of large-size wrenches.
Smart Images
Figure CN223057602U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hand tools, in particular to a bidirectional ratchet wrench. Background Art
[0002] Ratchet wrenches are widely used due to their small working swing angle, ease of use and high efficiency. They can be used to rotate bolts or nuts placed in narrow or difficult-to-access locations, thereby tightening or loosening bolts or nuts in one direction. Compared with ordinary ratchet wrenches, bidirectional ratchet wrenches can adjust the rotation direction of the ratchet ring relative to the wrench plate, thereby adjusting the working and rotation reset direction of the ratchet wrench.
[0003] Generally, the reversing structure of a two-way ratchet wrench realizes the reversing action by pulling the directional twist and pulling the ratchet through the hollow pin at the front end of the directional twist. When we pull the directional twist handle, we use the center of the directional twist as the fulcrum and the end of the hollow pin as the force point to pull the ratchet. The disadvantage of this structure is that the transmission point of the reversing force is too long, and the processing accuracy of the product is high. If the pawl groove is processed too deep, the pawl will be too close to the edge, and the directional twist will often be difficult to pull during reversing, especially the larger the specification, the more obvious it is. Therefore, on the basis of not increasing the original design size, improving the simplicity and convenience of the directional twist is a technical problem that needs to be solved urgently. Utility Model Content
[0004] In view of the above problems, the utility model provides a bidirectional ratchet wrench with a sophisticated structure and improved simplicity and convenience of directional twisting and pulling without increasing the original design size.
[0005] The technical solution of the utility model is:
[0006] A two-way ratchet wrench, comprising:
[0007] The lever body has a lever hole at its end, and a side of the lever hole is provided with an arc groove and a mounting groove that are connected in sequence;
[0008] A ratchet wheel rotatably disposed in the wrench hole;
[0009] A ratchet pawl is rotatably arranged in the arc groove, and a plurality of teeth are arranged on the front side to mesh with the ratchet wheel; a swing groove is arranged in the middle of the tail side, and a pin shaft is arranged vertically fixed in the swing groove;
[0010] The direction button is arranged in the installation groove, and a sliding groove adapted to the pin shaft is provided at the bottom, and the top extends out from the top opening of the installation groove. The pawl engagement direction is switched by turning it clockwise or counterclockwise.
[0011] Specifically, a pin hole is provided on the side of the direction button facing the pawl;
[0012] A hollow pin that protrudes through a spring is provided in the pin hole.
[0013] Specifically, a receiving cavity adapted to the spring is provided at the tail of the hollow pin.
[0014] Specifically, the inner side wall of the swinging groove is adapted to the direction knob and has an arc-shaped structure.
[0015] Specifically, the ratchet is limited in the wrench hole by a circlip.
[0016] The present utility model has improvements on the pawl and the direction knob. As Figures 1-4 shown, a pin shaft is added in the middle part of the pawl, and a sliding groove that cooperates with it is added below the spring hole of the direction knob. Therefore, during the commutation process, it is not necessary for the hollow pin to push the pawl. When the direction knob is pushed, the pawl is driven by the pin shaft of the pawl to achieve the commutation action. Since the position of the pin shaft is closer to the center of the circle of the direction knob, the commutation becomes easier and more stable, meeting the requirements of adjusting large-sized wrenches. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a three-dimensional structural schematic diagram of the split state of the present utility model;
[0018] Figure 2 is a three-dimensional structural schematic diagram of the bottom surface of the direction knob;
[0019] Figure 3 is a structural schematic diagram when the direction knob and the pawl are installed;
[0020] Figure 4 is a sectional structural schematic diagram after the direction knob is split;
[0021] In the figure, 100 is the wrench body, 110 is the wrench hole, 120 is the installation groove,
[0022] 200 is the ratchet,
[0023] 300 is the pawl, 310 is the pin shaft,
[0024] 400 is the direction knob, 410 is the sliding groove, 420 is the spring, 430 is the hollow pin. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.
[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.
[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0028] The following refers to Figures 1-4 describe the present utility model;
[0029] A two-way ratchet wrench, comprising:
[0030] A wrench body 100, with a wrench hole 110 provided at the end, and an arc-shaped groove and an installation groove 120 that are sequentially communicated provided at the side of the wrench hole 110;
[0031] A ratchet 200, rotatably arranged in the wrench hole 110;
[0032] A pawl 300, rotatably arranged in the arc-shaped groove, with several teeth provided on the front side, meshing with the ratchet 200; a swing groove is provided in the middle of the tail side, and a pin shaft 310 fixedly arranged vertically is provided in the swing groove;
[0033] A direction knob 400, arranged in the installation groove 120, with a sliding groove 410 adapted to the pin shaft 310 provided at the bottom, and the top extending out of the top opening of the installation groove 120. By turning it clockwise or counterclockwise, the switching of the meshing direction of the pawl 300 is realized.
[0034] Further optimized, a pin hole is provided on the side of the direction knob 400 facing the pawl 300;
[0035] A hollow pin 430 extending through a spring 420 is provided in the pin hole. The function of the extension of the hollow pin is to improve the stability of the turning of the direction knob 400.
[0036] A receiving cavity adapted to the spring 420 is provided at the tail of the hollow pin 430.
[0037] Further defined, the inner side wall of the swing groove is adapted to the direction knob 400 and has an arc-shaped structure.
[0038] The ratchet wheel 200 is limited in the wrench hole 110 by a circlip.
[0039] The working principle of the bidirectional ratchet wrench in the prior art is as follows: when the direction knob 400 is pulled to one side, the hollow pin 430 pushes the pawl 300 to engage with the ratchet wheel 200 under the push of the spring 420. At this time, the ratchet wheel 200, the pawl 300 and the wrench body form a direction lock, and the wrench can be used to turn the screw in this direction. When the wrench rotates in the opposite direction, as the ratchet wheel 200 rotates, the ratchet wheel 200 and the pawl 300 are separated under the retraction function of the spring 420 to achieve the function of the ratchet wheel 200 retracting.
[0040] In this case, improvements have been made to the pawl 300 and the direction knob 400. As Figures 1-4 shown, a pin shaft 310 is added to the middle part of the pawl 300, and a sliding groove 410 that matches it is added below the spring hole of the direction knob 400. Therefore, the hollow pin 430 does not need to push the pawl 300 during the commutation process. When the direction knob 400 is pulled, the pin shaft 310 of the pawl 300 drives the pawl 300 to achieve the commutation action. Since the position of the pin shaft 310 is closer to the center of the direction knob 400, the commutation becomes easier and more stable, meeting the requirements of adjusting large-sized wrenches.
[0041] Regarding the content disclosed in this case, the following points need to be explained:
[0042] (1) The attached drawings of the embodiments disclosed in this case only relate to the structures involved in the embodiments disclosed in this case, and other structures can refer to the general design;
[0043] (2) Without conflict, the embodiments disclosed in this case and the features in the embodiments can be combined with each other to obtain new embodiments;
[0044] The above is only the specific implementation manner disclosed in this case, but the protection scope of this disclosure is not limited thereto. The protection scope disclosed in this case shall be subject to the protection scope of the claims.
Claims
1. A two-way ratchet wrench, characterized in that, include: A lever body (100) is provided with a lever hole (110) at the end thereof, and a side portion of the lever hole (110) is provided with an arc groove and a mounting groove (120) which are connected in sequence; A ratchet wheel (200) rotatably disposed in the wrench hole (110); A ratchet pawl (300) is rotatably disposed in the arc-shaped groove, and is provided with a plurality of teeth on the front side thereof, meshing with the ratchet wheel (200); a swing groove is provided in the middle of the rear side thereof, and a pin shaft (310) is provided in the swing groove and is vertically fixed; The direction button (400) is arranged in the installation groove (120), and has a sliding groove (410) adapted to the pin shaft (310) at the bottom, and a top extending from the top opening of the installation groove (120). By turning the direction button in a clockwise or counterclockwise direction, the engagement direction of the pawl (300) can be switched.
2. The double-direction ratchet wrench according to claim 1, wherein The direction button (400) is provided with a pin hole on the side facing the pawl (300); A hollow pin (430) extending through a spring (420) is arranged in the pin hole.
3. The double-direction ratchet wrench according to claim 2, wherein, The tail of the hollow pin (430) is provided with a receiving cavity adapted to the spring (420).
4. A two-way ratchet wrench according to claim 2, characterized in that, The inner side wall of the swing groove is matched with the direction button (400) and has an arc-shaped structure.
5. A two-way ratchet wrench according to claim 1, characterized in that, The ratchet wheel (200) is restrained in the lever hole (110) by a retaining spring.