Ratchet wrench device

Abstract

According to the ratchet wrench device, a wrench head is provided with a ratchet space and a steering hole, the side, facing the steering hole, of the ratchet space is concavely provided with a concave arc groove, the ratchet space is provided with a ratchet steering control device, and the steering hole is provided with a steering device; the ratchet wheel steering control device comprises a cylindrical ratchet wheel, a first brake block and a second brake block; the first and second brake blocks are provided with ratchets facing the gear teeth and provided with brake grooves opposite to the gear teeth, the two sides of the first and second brake blocks are provided with arc parts, the ratchets are meshed with the ratchet gear teeth, each brake groove forms a first rotating arc part and a second rotating arc part, and the tail ends of the two sides of each brake groove are provided with back top parts; the ratchet wheel steering control device is fixed into the ratchet wheel space through the fixing piece. The steering device comprises a shifting piece and two jacking holes, the jacking holes correspond to the first braking block and the second braking block respectively, ratchets of the first braking block and the second braking block are meshed with the corresponding tooth concave portions and the tooth tip sides respectively, and the jacking holes contain jacking heads and jacking springs respectively, so that the jacking heads jacked by the jacking springs can jack the rotating arc portions of the braking blocks.

Description

Technical Field

[0001] This invention belongs to the field of ratchet wrench devices, specifically referring to ratchet wrenches applied to hand tools, and especially ratchet wrenches that can be used for reciprocating rotation. It is an invention with excellent practicality. Background Technology

[0002] As shown in Figures 9, 10, and 11, a conventional reversible ratchet wrench generally includes a ratchet 2 and a ratchet block 3 inside the wrench head 1, and a switching unit 4 for controlling the ratchet block 3. The switching unit 4 generally includes an actuating element 5, a spring 6, and a connecting element 7 disposed therein. The connecting element 7 protrudes from the actuating element 5 and extends into the top groove 8 of the ratchet block 3 under the elastic force of the spring 6. By turning the actuating element 5 left and right, the direction and position of the connecting element 7 and the ratchet block 3 are changed accordingly, thereby changing the rotation direction of the ratchet 2.

[0003] The above-mentioned examples have the following problems: When the actuating element 5 is shifted, the linkage 7 pushes along the top groove 8 of the ratchet block 3. At this time, because the two sides 31 of the ratchet block 3 and the actuating wall 9 of the wrench head 1 are in linear planar contact, the ratchet block 3 and the actuating wall 11 are very likely to be tightly pressed without any clearance. Therefore, during use, the ratchet block 3 is prone to jumping out and shifting unsmoothly, which makes the user feel that it is sticking and uncomfortable.

[0004] As explained above, because the two sides 31 of the ratchet block 3 and the actuating wall 9 of the wrench head 1 are in linear planar contact, the left and right deflection angle of the linkage 7 is easily too small, only about -26 degrees to 0 degrees to 26 degrees. This makes it impossible to achieve the maximum pulling effect between the ratchet block 3 and the ratchet 2, thus limiting the maximum torque that can be achieved during use.

[0005] Furthermore, since the ratchet 2 of this type of ratchet wrench design uses a single linkage 7 for the outer ratchet teeth 21, there is a limitation on the number of ratchet teeth 21. Therefore, the common number of ratchet teeth is mostly 60 to 72, and the necessary swing angle of the wrench is 5 to 6 degrees. However, with the development of technology, products are becoming smaller and smaller, and various tools and devices are becoming more and more crowded. There is an increasing demand for ratchet wrenches with a smaller necessary swing angle. If the swing angle is to be reduced, the number of teeth must be increased. However, increasing the number of teeth without changing the ratchet size will reduce the force that the teeth can bear. If the ratchet size is increased, the wrench will not be able to operate in narrow spaces. How to develop a way to further reduce the necessary swing angle of the ratchet wrench without changing the ratchet size and the number of ratchet teeth is a problem that urgently needs to be solved.

[0006] The ratchet 2 top locking groove 8 of this ratchet wrench design is an arc shape. The arc is designed with the length of the ratchet 2 as the center. Therefore, the arc is too large, which makes the oblique locking force of the linkage 7 when locking the ratchet block 3 insufficient, and naturally cannot meet the modern requirements for bearing capacity.

[0007] In view of the problems known in the background art described above, the inventors have devoted a great deal of time to studying relevant knowledge, comparing the advantages and disadvantages of various products, conducting research and development on related products, and undergoing numerous experiments and tests, and finally launched a "ratchet wrench device" to improve the above-mentioned deficiencies and meet the needs of the public.

[0008] Therefore, there is an urgent need to design a ratchet wrench device to solve the problems mentioned above. Summary of the Invention

[0009] The purpose of this invention is to provide a ratchet wrench device, including a wrench head, the wrench head having a penetrating ratchet space and a turning hole, wherein the ratchet space of the wrench head is recessed into a semi-circular concave groove on one side toward the turning hole, so that the ratchet space is used to install a ratchet turning control device, and the turning hole is used to install a turning device. The ratchet steering control device includes a cylindrical ratchet with teeth on its periphery and first and second brake blocks. In addition, the first and second brake blocks have ratchet teeth facing the teeth and brake grooves formed in the direction away from the teeth. The two sides of the first and second brake blocks have arc-shaped portions corresponding to the shape of the concave arc grooves. The ratchet teeth are for engaging the ratchet teeth, and the brake grooves each have corresponding first and second rotating arc portions. The two ends of the brake grooves are provided with concave tops. A retaining element is provided for securing the ratchet steering control device to the ratchet space of the wrench head; and The steering device includes a lever and two top-clutch holes disposed therein. The top-clutch holes can correspond to the first and second braking blocks respectively, and the ratchet teeth of the first and second braking blocks can respectively engage with the corresponding ratchet teeth and the tips of the ratchet teeth. In addition, the top-clutch holes respectively accommodate the top-clutch head and the top-clutch spring inside the top-clutch head. In this way, the top-clutch head, which is pushed by the top-clutch spring, can be engaged against the rotating arc of the braking block, and achieve the main structural effect of the present invention.

[0010] The main objective of this invention is to provide a ratchet wrench device with a smaller bite angle, making it more convenient to use in terms of space and achieving better structural stability and load-bearing capacity.

[0011] However, the device of the present invention can achieve the above-mentioned effects and improve the known deficiencies. Therefore, the present invention can be said to be a very practical and progressive invention, which is worthy of promotion by industry and public disclosure to the general public. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the assembly of the present invention; Figure 3 This is a schematic diagram of the combined longitudinal cross-sectional structure of the ratchet wrench of the present invention; Figure 4 This is a cross-sectional view and operational schematic diagram of the ratchet wrench assembly of the present invention. Figure 1 ; Figure 5 This is a cross-sectional view and operational schematic diagram of the ratchet wrench assembly of the present invention. Figure 2 ; Figure 6 This is a cross-sectional view and operational schematic diagram of the ratchet wrench assembly of the present invention. Figure 3 ; Figure 7 This is a cross-sectional view and operational schematic diagram of the ratchet wrench assembly of the present invention. Figure 4 ; Figure 8 This is a cross-sectional view and schematic diagram of another embodiment of the ratchet wrench of the present invention; Figure 9 A cross-sectional view and schematic diagram of a known reversible ratchet wrench. Figure 1 ; Figure 10 A cross-sectional view and schematic diagram of a known reversible ratchet wrench. Figure 2 ; Figure 11 A cross-sectional view and schematic diagram of a known reversible ratchet wrench. Figure 3 ; Explanation of markings in the diagram: 1: Wrench head 2: Ratchet 21: Ratchet 3: Ratchet block 31: Side 4: Switching Unit 5: Toggle component 6: Spring 7: Linkage components 8: Top control slot 9: Actuating wall 10: Wrench head 11: Ratchet Space 12: Steering hole 13: Concave groove 20: Ratchet Steering Control Device 21: Ratchet 210: Gear teeth 211, 213: Tooth recess 212, 214: Tooth cusp side 22: First brake block 221: Ratchet 222: Braking groove 223: Arc section 2221: First rotating arc 2222: Second rotating arc 2223: Back to top 23: Second brake block 231: Ratchet 232: Braking slot 233: Arc portion 2321: First rotating arc 2322: Second rotating arc 2323: Back to top 2324: Third rotating arc 30: Steering device 31: Toggle element 321, 322: Top control hole 331, 332: Top brake head 341, 342: Top control spring 40: Fasteners Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0015] The following reference Figures 1 to 7This invention describes a ratchet wrench device. It includes a wrench head 10, which has a penetrating ratchet space 11 and a steering hole 12. The ratchet space 11 of the wrench head 10 is recessed into a semi-circular groove 13 on one side toward the steering hole 12, such that the ratchet space 11 is used to house a ratchet steering control device 20, and the steering hole 12 is used to house a steering device 30.

[0016] The ratchet steering control device 20 includes a cylindrical ratchet 21 with teeth 210 on its periphery and first and second brake blocks 22 and 23. In addition, the first and second brake blocks 22 and 23 have ratchet teeth 221 and 231 facing the teeth 210, and brake grooves 222 and 232 formed in the direction away from the teeth 210. The sides of the first and second brake blocks 22 and 23 are provided with corresponding arc portions 223 and 233 relative to the shape of the concave arc groove 13. The ratchet teeth 221 and 231 are for engaging the teeth 210 of the ratchet 21. The brake grooves 222 and 232 are each formed with corresponding first and second rotating arc portions 2221, 2222 and 2321, 2322. The ends of the brake grooves 222 and 232 are provided with concave tops 2223 and 2323.

[0017] A fastener 40 is provided for securing the ratchet steering control device 20 to the ratchet space 11 of the wrench head 10.

[0018] The steering device 30 includes a lever 31 and two top-locking holes 321 and 322 disposed therein. The top-locking holes 321 and 322 can respectively correspond to the first and second brake blocks 22 and 23, and the ratchet teeth 221 and 231 of the first and second brake blocks 22 and 23 can respectively engage the tooth recess 211 of the corresponding ratchet 21 and the tooth tip side 212 of the corresponding ratchet 21. In addition, the top-locking holes 321 and 322 respectively accommodate top-locking heads 331 and 332 and top-locking springs 341 and 342 inside the top-locking heads 331 and 332, so that the top-locking heads 331 and 332, which are pushed by the top-locking springs 341 and 342, can be locked against the rotating arc portions 2221, 2222 and 2321, 2323 of the brake blocks 22 and 23.

[0019] like Figures 2 to 5 As shown, during assembly, the ratchet steering control device 20 of the ratchet wrench device of the present invention can be housed in the penetrating ratchet space 11, so that the ratchet teeth 221 and 231 of the first and second braking blocks 22 and 23 can respectively engage in the tooth recess 211 of the corresponding tooth 210 and the tooth tip side 212 of the tooth 210. Then, the ratchet steering control device 20 is fixed to the ratchet space 11 of the wrench head 10 by means of the fastener 40. Furthermore, the steering device 30 is fitted into the steering hole 12 of the wrench head 10, and the top brake heads 331 and 332, which are housed in the top brake holes 321 and 322, are braked by the elastic force of the top brake springs 341 and 342, so that the top brake heads 331 and 332 brake the rotating arc portions 2221 and 2321 on the same side of the brake blocks 22 and 23.

[0020] In use, the ratchet teeth 221 and 231 of the first and second braking blocks 22 and 23 can respectively engage the corresponding tooth recesses 211 and tooth tip sides 212 of the ratchet 210. Therefore, when rotating the working object (not shown in the figure), the ratchet teeth 221 and 231 of the first and second braking blocks 22 and 23 respectively engage the tooth recesses 211 and tooth tip sides 212 of the ratchet 210. Furthermore, since the first and second braking blocks 22 and 23 are each fitted with their respective top braking heads 331... The first rotating arc portion 2221 and 2321 within the braking groove 222 and 232 of the ratchet steering control device 20 are engaged, thereby achieving the effect of engaging the working object. This also causes the rotation angle of the teeth 210 of the entire ratchet steering control device 20 to be approximately only half of the original angle. In other words, the angle of the adjacent ratchet teeth 211 is changed to the angle from the tooth recess 211 of the tooth 210 to the tooth tip side 212 of the adjacent tooth 210. This allows the user to achieve the minimum rotation angle when operating the invention, greatly eliminating the limitation of space.

[0021] Furthermore, it should be noted that the braking grooves 222 and 232 of the present invention are respectively provided with corresponding first and second rotating arc portions 2221, 2222 and 2321, 2322. The arc of the first and second rotating arc portions 2221, 2222 and 2321, 2322 is smaller than the arc radius of the braking grooves 222 and 232. This results in a larger arc angle, which allows the top braking heads 331, 332 to have a larger force component on the branch braking direction when braking, so as to tightly push the braking blocks 22, 23 to push the ratchet 21. Moreover, the two ends of the braking grooves 222 and 232 are provided with concave return tops 2223, 2323, which can further ensure that the space of the top braking heads 331, 332 is limited and they do not leave the rotating arc portions 2221, 2222 and 2321, 2322 of the braking blocks 21, 23.

[0022] When the present invention is to be used in reverse, the top brake heads 331 and 332 can be actuated by the toggle member 31 to engage with the rotating arc portions 2222 and 2323 on the other side. Similarly, the ratchet teeth 221 and 231 of the first and second brake blocks 22 and 23 can be engaged with the tooth recess 213 of the ratchet tooth 210 of the ratchet wheel 21 on the other side and the tooth tip side 214 of the ratchet tooth 213, respectively. This allows the user to achieve the smallest possible angle of rotation when operating the present invention, greatly eliminating the limitation of space.

[0023] Furthermore, the first and second braking blocks 22 and 23 of the present invention are provided with arc-shaped portions 223 and 233 on both sides relative to the shape of the concave arc groove 13. Therefore, when the first and second braking blocks 22 and 23 are pushed, the arc-shaped portions 223 and 233 on both sides can abut against the concave arc groove 13 with circular contact surfaces in an arc manner, and can reach a maximum expansion of -45 degrees to 0 degrees to +45 degrees, thereby achieving the best abutting force.

[0024] Please refer to the following: Figure 8 In another embodiment of the present invention, a third rotating arc portion 2224 and 2324 may be provided between the braking grooves 222 and 232. This allows the first and second rotating arc portions 2221, 2222 and 2321, 2322 to have a larger rotation arc and a larger angle arc, which allows the top braking heads 331 and 332 to have a larger force on the branch braking direction when braking, so as to tightly push the braking blocks 22 and 23 to push the ratchet 21. When the braking heads 331 and 332 brake the third rotating arc portion 2224 and 2324, they can achieve the effect of not pushing the braking blocks 22 and 23 to either side, that is, it can increase the smoothness of the ratchet 21 when it is engaged.

[0025] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A ratchet wrench device, comprising a wrench head, the wrench head having a penetrating ratchet space and a turning hole, wherein the ratchet space of the wrench head is recessed into a semi-circular concave groove on one side toward the turning hole, such that the ratchet space is provided for accommodating a ratchet turning control device, and the turning hole is provided for accommodating a turning device. The ratchet steering control device includes a cylindrical ratchet with teeth on its periphery and first and second brake blocks. In addition, the first and second brake blocks have ratchet teeth facing the direction of the teeth, and brake grooves are formed in the direction away from the teeth. The two sides of the first and second brake blocks have arc-shaped portions corresponding to the shape of the concave arc grooves. The ratchet teeth are for engaging the ratchet teeth, and the brake grooves each have corresponding first and second rotating arc portions. The two ends of the brake grooves are provided with concave tops. A retaining element is provided for securing the ratchet steering control device to the ratchet space of the wrench head; and The steering device includes a lever and two top-locking holes disposed therein. The top-locking holes can correspond to the first and second braking blocks respectively, and the ratchet teeth of the first and second braking blocks can respectively engage the tooth recess of the corresponding ratchet teeth and the tooth tip side of the corresponding ratchet teeth. In addition, the top-locking holes respectively accommodate the top-locking head and the top-locking spring inside the top-locking head. In this way, the top-locking head, which is pushed by the top-locking spring, can be locked against the rotating arc of the braking block, and achieve the various structural effects of the present invention.

2. The ratchet wrench device according to claim 1, characterized in that, A third rotating arc section may be provided in the middle of the braking groove.

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