Ratchet device
By designing a ratchet device with ratchet blocks of different thicknesses and an arc groove structure, the problem of using ratchet wrenches in narrow spaces was solved, achieving high torque output and stable operation under small-angle rotation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 陈怡富
- Filing Date
- 2024-11-11
- Publication Date
- 2026-05-12
AI Technical Summary
Existing ratchet wrenches are prone to ratchet block disengagement and insufficient torque due to small angle during use. Furthermore, the limited number of ratchet teeth prevents the swing angle from being further reduced, making them unsuitable for use in confined spaces.
A ratchet device was designed, including first and second pavers with different thicknesses, coupled with a toggle element and a top pavers spring. The ratchet blocks are designed with different thicknesses to achieve small-angle rotation. Combined with the arc groove structure, the ratchet can achieve stable engagement and convenient spatial operation.
It achieves increased torque output at small rotation angles, enhances structural stability and ease of assembly, and solves the problem of using ratchet wrenches in confined spaces.
Smart Images
Figure CN122008118A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of ratchet devices, specifically referring to wrenches applied to hand tools, and especially to ratchet wrenches that can be rotated, making it an invention with excellent practicality. Background Technology
[0002] As shown in Figures 8, 9, and 10, a known reversible ratchet wrench is generally constructed, comprising 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 a toggle member 5, a spring 6, and a linkage member 7 disposed therein. The linkage member 7 protrudes from the toggle member 5 and extends into the top groove 8 of the ratchet block 3 under the elastic force of the spring 6. By turning the toggle member 5 left and right, the direction and position of the linkage member 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: First, 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] Secondly, 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 60-72, and the necessary swing angle of the wrench is 5-6 degrees. However, with the development of technology, items 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] In view of the problems caused by the known structures described in the background art above, the inventors have devoted a lot of time to studying relevant knowledge, comparing the advantages and disadvantages of various technologies, conducting research and development on related products, and undergoing numerous experiments and tests, and finally launched a "ratchet device" to improve the above-mentioned deficiencies and meet the needs of the public. Summary of the Invention
[0007] The present invention relates to a ratchet device, which mainly includes a wrench head, the wrench head having a penetrating ratchet space and a steering hole, wherein the ratchet space of the wrench head is recessed into a semi-circular concave groove on one side toward the steering hole, so that the ratchet space is provided for a ratchet steering control device, and the steering hole is provided for a steering device. The ratchet steering control device includes a cylindrical ratchet with teeth on its periphery and first and second brake blocks; the first and second brake blocks have ratchet teeth facing the teeth, and brake grooves are formed in the direction away from the teeth. The two sides of the first and second brake blocks are provided with arc portions relative to the shape of the concave arc grooves, and the two ends of the first and second brake blocks form a contact portion with a thickness (H, h), and the thickness H of the first brake block is greater than the thickness h of the second brake block. 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 toggle member and first and second top-locking holes disposed therein. The first and second top-locking holes correspond to first and second braking blocks respectively. The first and second top-locking holes are respectively for accommodating first and second top-locking heads and accommodating first and second top-locking springs inside the first and second top-locking heads. In this way, the first and second top-locking heads, which are pushed by the first and second top-locking springs, can be locked in the first and second braking grooves of the first and second braking blocks. With the above structure, the user can achieve a minimum angle of rotation when operating the invention, eliminating space limitations and achieving the main structural effect of the invention.
[0008] The main objective of this invention is to provide a ratchet device with a smaller bite angle, making it more space-efficient during use, and achieving better structural stability and easier assembly.
[0009] In summary, the ratchet device of the present invention effectively improves and solves known problems. It is a highly practical and progressive invention, and is well worth promoting in industry and making public to the general public. Attached Figure Description
[0010] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the external structure of the present invention; Figure 3 This is a schematic diagram of the longitudinal cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the transverse cross-sectional movement of the ratchet wrench of the present invention during operation. Figure 1 ; Figure 5 This is the second schematic diagram of the transverse cross-sectional movement of the ratchet wrench of the present invention during operation; Figure 6 This is a cross-sectional view and schematic diagram of the ratchet wrench of the present invention on the other side during operation. Figure 1 ; Figure 7 This is a cross-sectional view and schematic diagram of the ratchet wrench of the present invention on the other side during operation. Figure 2 ; Figure 8 A cross-sectional view and schematic diagram of a known reversible ratchet wrench. Figure 1 ; Figure 9 A cross-sectional view and schematic diagram of a known reversible ratchet wrench. Figure 2 ; Figure 10 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 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 211: Gear teeth 22: First brake block 221: Ratchet 222: First Braking Slot 223: Arc section 224: Affixed to the back 23: Second brake block 231: Ratchet 232: Second brake slot 233: Arc section 234: Affixed to the back 30: Steering device 31: Toggle element 321, 322: First and second top control holes 331, 332: First and second top brakes 341, 342: First and second top control springs 40: Fasteners Detailed Implementation
[0011] 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.
[0012] 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.
[0013] The following is a reference to the appendix. Figure 1 To be continued Figure 7 This invention describes a ratchet device. The ratchet device 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.
[0014] The ratchet steering control device 20 includes a cylindrical ratchet 21 with teeth 211 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 21, and brake grooves 222 and 232 formed in the direction away from the teeth 21. The sides of the first and second brake blocks 22 and 23 are provided with arc portions 223 and 233 relative to the shape of the concave arc groove 13. The two ends of the first and second brake blocks 22 and 23 form a contact portion 224 and 234 with a thickness (H and h), where H > h.
[0015] A fastener 40 is provided for securing the ratchet steering control device 20 to the ratchet space 11 of the wrench head 10.
[0016] The steering device 30 includes a toggle member 31 and first and second top-locking holes 321 and 322 disposed therein. The first and second top-locking holes 321 and 322 can respectively correspond to the first and second brake blocks 22 and 23. The first and second top-locking holes 321 and 322 are respectively for accommodating the first and second top-locking heads 331 and 332 and the first and second top-locking springs 341 and 342 accommodating the first and second top-locking heads 331 and 332. In this way, the first and second top-locking heads 331 and 332, which are pushed by the first and second top-locking springs 341 and 342, can be locked in the first and second brake grooves 222 and 232 of the first and second brake blocks 22 and 23.
[0017] As shown in Figures 3 to 5, when assembling the ratchet device of the present invention, the ratchet steering control device 20 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 the corresponding ratchet teeth 211. 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 can be fitted into the steering hole 12 of the wrench head 10, and the first and second top brake heads 331 and 332, which are accommodated in the first and second top brake holes 321 and 322, are respectively subjected to the elastic force of the first and second top brake springs 341 and 342, so that the first and second top brake heads 331 and 332 respectively brake the first and second brake grooves 222 and 232 of the first and second brake blocks 22 and 23.
[0018] When assembled, the present invention can be directly rotated to the right side using the actuating member 31 (best shown in the fourth figure). At this time, since the ratchet teeth 221 and 231 of the first and second braking blocks 22 and 23 can respectively engage the corresponding ratchet teeth 211, and since the thickness H of the abutting part 234 of the first braking block 22 is relatively long, the arc part 223 of the first braking block 22 will abut against the concave arc groove 13 of the wrench head 10 earlier, thus the ratchet 21 will not be able to rotate because the teeth 211 are pressed against the abutting part 234 of the first braking block 22. When the wrench head 10 is turned back and forth, the first braking block 22 will rotate to the left by a certain angle due to the rotation of the wrench head 10. At this time, because the thickness h of the second braking block 23's abutting part 234 is less than H, there is space between its arc part 233 and the concave arc groove 13 of the wrench head 10. Therefore, the second braking block 23 is simultaneously subjected to the pushing action of the second top braking head 332. As a result, the second braking block 23 will push upward until the arc part 233 of the second braking block 23 abuts against the concave arc groove 13. And because h is less than H, when the second braking block 23 engages the gear teeth 211 at this time, the ratchet teeth 231 of the first braking block 22 can only bite the tip of the teeth 211 of the ratchet 21, as best shown in the fifth figure.
[0019] With the above structure, when the work object (not shown in the figure) is rotated, the ratchet teeth 221 and 231 of the first and second braking blocks 22 and 23 respectively engage with the adjacent ratchet teeth 211. Due to the different thicknesses of the different abutment portions 224 and 234, the first and second braking blocks 22 and 23 are subjected to the top braking heads 331 and 332 in the braking grooves 222 and 232, thereby achieving the effect of braking the work object at a small angle. Furthermore, the ratchet teeth 221 and 231 of the first and second braking blocks 22 and 23 can respectively engage with the tooth recess of the corresponding ratchet tooth 211 and the tooth tip side of the adjacent tooth 211 in an alternative manner.
[0020] Similarly, when the ratchet teeth 221 and 231 of the first and second brake blocks 22 and 23 respectively engage the adjacent ratchet teeth 211, the rotation angle of the teeth 211 of the entire ratchet steering control device 20 is only half of the original due to the different thicknesses of the different contact portions 224 and 234. That is to say, the angle between the teeth of the ratchet teeth 211 is changed to the rotatable angle between the tooth concave and the tooth tip. In this way, the user can achieve the minimum angle of rotation when operating the present invention, greatly eliminating the limitation of space and making assembly more convenient.
[0021] When the present invention is to be used in a different direction, it can be moved to the other side by the toggle member 31 (see Figures 6 and 7). When the top brake heads 331 and 332 are respectively engaged with the brake grooves 222 and 232 on the other side, the ratchet teeth 221 and 231 of the first and second brake blocks 22 and 23 respectively will engage with the teeth 211 of the ratchet 21. Due to the different thicknesses of the different abutment parts 224 and 234, the rotation angle of the teeth 211 of the ratchet steering control device 20 is only half of the original. This allows the user to achieve the minimum rotation angle when operating the present invention, greatly eliminating space limitations.
[0022] The first and second braking blocks 22 and 23 of the present invention have arc-shaped portions 223 and 233 on both sides corresponding 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 achieve a maximum expansion of -45 degrees to 0 degrees to +45 degrees, thereby achieving the optimal abutting force. 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 device, characterized in that, The device includes a wrench head, which has a through ratchet space and a steering hole. The ratchet space of the wrench head is recessed into a semi-circular groove on one side of the steering hole, so that the ratchet space is used to install a ratchet steering control device, and the steering hole is used to install a steering device. The ratchet steering control device includes a cylindrical ratchet with teeth on its periphery and first and second brake blocks; the first and second brake blocks have ratchet teeth facing the teeth, and brake grooves are formed in the direction away from the teeth. The two sides of the first and second brake blocks are provided with arc portions relative to the shape of the concave arc grooves, and the two ends of the first and second brake blocks form a contact portion with a thickness (H, h), and the thickness H of the first brake block is greater than the thickness h of the second brake block. One fastener is used to secure the ratchet steering control device to the ratchet space of the wrench head; as well as The steering device includes a toggle member and first and second top-locking holes disposed therein. The first and second top-locking holes correspond to first and second braking blocks respectively. The first and second top-locking holes are respectively for accommodating first and second top-locking heads and for accommodating first and second top-locking springs inside the first and second top-locking heads. In this way, the first and second top-locking heads, which are pushed by the first and second top-locking springs, can be locked in the first and second braking grooves of the first and second braking blocks. With the above structure, the user can achieve the effect of minimal rotation angle when operating the invention, eliminating space limitations and simplifying assembly.