ratchet wrench device

Abstract

A ratchet wrench device comprising: a ratchet wrench head 10 with a ratchet chamber 11 and a reversing hole 12, wherein the ratchet chamber 11 has a recess on one side of the reversing hole 12 formed in the form of a concave depression 13, a ratchet reversing control device 20 is arranged in the ratchet chamber 11 and a reversing device 30 in the reversing hole 12; wherein the ratchet reversing control device 20 comprises a cylindrical ratchet 21, a first locking block 22 and a second locking block 23, the side of the first and second locking blocks 22, 23 facing the gear teeth 210 being provided with ratchet teeth 221 and 231 respectively, and the side facing away from the gear teeth 210 being provided with a locking recess 222 and 232 respectively, the two sides of the first and second locking blocks 22, 23 being formed with an arc section 223 and 232 respectively.233 are provided, the ratchet teeth 221, 231 can be engaged with the gear teeth 210 of the ratchet 21, each locking recess 222, 232 is provided with a first and a second arc-shaped rotary section 2221, 2222 or 2321, 2322 and the two ends of each locking recess 222, 232 are each provided with a return section 2223 or 2323.2323 are provided; a fastening arrangement 40 by which the ratchet reversing control device 20 is fastened in the ratchet chamber 11; wherein the reversing device 30 comprises a switching piece 31 and two engagement locking bores 321, 322, the engagement locking bores 321, 322 each corresponding with the first and second locking blocks 22, 23, the ratchet teeth 221, 231 of the first and second locking blocks 22, 23 each being able to engage with the tooth roots 211 and the tooth flanks 212 of the corresponding gear teeth 210, the engagement locking heads 331, 332 and the engagement locking springs 341, 342 being housed in the corresponding engagement locking bores 321, 322, such that the engagement locking heads 331, 332, elastically pressed by the corresponding engagement locking springs 341, 342, are against the arc-shaped rotary sections 2221, 2222 and 2321, 2323 of the corresponding locking blocks 22 and 23 can be pressed.

Description

[0001] The present invention relates to a ratchet wrench device, which is particularly suitable for use with hand tools, namely ratchet wrenches, and especially for reversible ratchet wrenches. The present invention exhibits excellent practicality.

[0002] It will be directed to the Fig. 8, Fig. 9 and Fig. Reference is made to Figure 10, which shows a conventional reversible ratchet wrench. The construction is such that a ratchet 2 and a ratchet block 3 are arranged in a ratchet wrench head 1, and a switching unit 4 serves to control the ratchet block 3 and comprises a switching piece 5, a spring 6 arranged therein, and a drive piece 7 arranged therein, wherein the drive piece 7 is moved by the elastic force of the spring 6 and thereby projects out of the switching piece 5 and extends into the engagement / locking recess 8 of the ratchet block 3, wherein by switching the switching piece 5 to the left and right the directions and positions of the drive piece 7 and the ratchet block 3 can be changed accordingly in order to change the direction of rotation of the ratchet 2.

[0003] The aforementioned conventional ratchet wrench has the following problems: First, the drive piece 7 presses upwards along the locking recess 8 of the ratchet block 3 during the rotation of the switching piece 5. Since at this point the two side sections 31 of the ratchet block 3 are in linear, plane contact with the actuating wall 9 of the ratchet wrench head 1, This can lead to the ratchet block 3 being pressed firmly and without any play against the actuating wall 9. Therefore, it is easy for the ratchet block 3 to pop out during use and change its position unevenly, giving the user the feeling of it being stuck.

[0004] Secondly, the left and right pivot angles of the drive piece 7 can easily be within a small angular range, only about -26° to 0° to 26°, because the two side sections 31 of the ratchet block 3 are in linear, planar contact with the actuating wall 9 of the ratchet wrench head 1. As a result, the maximum locking effect of the ratchet block 3 and the ratchet 2 cannot be achieved, so that the maximum achievable torque is insufficient during use.

[0005] Thirdly, the number of ratchet teeth 24 is limited because the outer ratchet teeth 24 of the ratchet 2 of this ratchet wrench engage with a single drive piece 7. Therefore, the number of ratchet teeth is typically between 60 and 72, resulting in a required swivel angle of the ratchet wrench of 5° to 6°. However, as technology advances, objects become smaller, and the assembly of various devices becomes increasingly confined. There is a growing demand for ratchet wrenches that require a smaller swivel angle. If the swivel angle needs to be reduced, the number of gear teeth must be increased. However, if the number of gear teeth is increased without changing the size of the ratchet, the force that the gear teeth can withstand is reduced. Conversely, if the size of the ratchet is increased, the ratchet wrench can no longer be used in confined spaces.How to develop a ratchet wrench in which the required swivel angle of the ratchet wrench can be reduced without changing the size of the ratchet and the number of gear teeth is a problem that urgently needs to be solved.

[0006] Fourthly, the locking recess 8 of the ratchet 2 of this ratchet wrench is arc-shaped, with the radius of the arc being such that the length of the ratchet 2 serves as the center point of the arc. Therefore, the radius of the arc is too large, so that when the ratchet block 3 is pressed, the oblique pressure force of the drive piece 7 is not sufficient, thus failing to meet modern requirements for resistance.

[0007] In view of the problems in the prior art, the inventor, drawing on his many years of professional experience, dedicated himself to solving the problems and, after several changes, trials and improvements, finally produced a ratchet wrench device to remedy the aforementioned shortcomings and meet the needs of the public.

[0008] The present invention relates to a ratchet wrench device comprising a ratchet wrench head, wherein the ratchet wrench head is provided with a hollow ratchet chamber and a reversing hole, the ratchet chamber of the ratchet wrench head has a recess on one side of the reversing hole formed in the form of a semicircular concave depression, the ratchet chamber serves for arranging a ratchet reversing control device and the reversing hole serves for arranging a reversing device; wherein the ratchet reversing control device comprises a cylindrical ratchet provided with gear teeth on its circumference, a first locking block and a second locking block, the side of the first and second locking blocks facing the gear teeth being provided with ratchet teeth and the side facing away from the gear teeth being provided with a locking recess, the two sides of the first and second locking blocks being provided with an arcuate section corresponding to the shape of the concave recess, the ratchet teeth serving to engage with the gear teeth of the ratchet, each locking recess being provided with a first arcuate rotating section and a second arcuate rotating section matched thereto, and the two ends of each locking recess being provided with a concave return section; a fastening arrangement used to fasten the ratchet reversing control device in the ratchet chamber of the ratchet wrench head; wherein the reversing device comprises a switching piece and two engagement locking bores located therein, wherein the engagement locking bores each correspond to the first and the second locking block, such that the ratchet teeth of the first and the second locking block can each be brought into engagement with the tooth roots and the tooth flanks of the corresponding gear teeth of the ratchet, wherein furthermore each engagement locking bore serves to receive the corresponding engagement locking head and the engagement locking spring arranged in the corresponding engagement locking head, such that the engagement locking heads elastically pressed by the corresponding engagement locking springs can be pressed against the arcuate rotary sections of the corresponding locking blocks in order to achieve the advantageous effect of the main structure of the present invention.

[0009] The main objective of the present invention is to provide a ratchet wrench device with a smaller engagement angle of the ratchet teeth, which makes it more comfortable to use and ensures better structural stability and higher strength.

[0010] The device according to the invention allows the aforementioned advantageous effects to be achieved and the problems known from the prior art to be solved. The present invention is very practical and advanced. Fig. Figure 1 shows a schematic perspective exploded view of the ratchet wrench according to the invention; Fig. Figure 2 shows a schematic perspective view of the ratchet wrench according to the invention; Fig. Figure 2A shows a schematic longitudinal section of the ratchet wrench according to the invention; Fig. Figure 3 shows a schematic cross-section of the ratchet wrench according to the invention during a first actuation; Fig. Figure 4 shows a schematic cross-section of the ratchet wrench according to the invention during a second actuation; Fig. Figure 5 shows a schematic cross-section of the ratchet wrench according to the invention during a third actuation; Fig. Figure 6 shows a schematic cross-section of the ratchet wrench according to the invention during a fourth actuation; Fig. Figure 7 shows a schematic cross-section of another embodiment of the ratchet wrench according to the invention during operation; Fig. Figure 8 shows a schematic cross-section of a conventional reversible ratchet wrench during initial operation; Fig. Figure 9 shows a schematic cross-section of the conventional reversible ratchet wrench during a second actuation; Fig. Figure 10 shows a schematic cross-section of the conventional reversible ratchet wrench during a third actuation.

[0011] In the following, specific embodiments of the ratchet wrench device according to the invention are described in detail, so that a person skilled in the art in this field can easily understand the advantages and beneficial effects of the present invention based on the description.

[0012] It will be directed to the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. Reference is made to Section 6. The ratchet wrench device according to the invention comprises a ratchet wrench head 10, which is provided with a hollow ratchet chamber 11 and a reversing hole 12, wherein the ratchet chamber 11 of the ratchet wrench head 10 has a recess on one side of the reversing hole 12 formed in the form of a semicircular concave depression 13, the ratchet chamber 11 serves for the arrangement of a ratchet reversing control device 20 and the reversing hole 12 serves for the arrangement of a reversing device 30.

[0013] The ratchet reversing control device 20 comprises a cylindrical ratchet 21 provided with gear teeth 210 on its circumference, a first locking block 22 and a second locking block 23, wherein the side of the first and second locking blocks 22, 23 facing the gear teeth 210 is further provided with ratchet teeth 221 and 231 respectively, and the side facing away from the gear teeth 210 is provided with a locking recess 222 and 232 respectively, corresponding to the shape of the concave recess 13, the two sides of the first and second locking blocks 22, 23 are provided with an arcuate section 223 and 233 respectively, the ratchet teeth 221 and 231 serve to engage with the gear teeth 210 of the ratchet 21, and each locking recess 222, 232 has a first arcuate rotary section 2221 and 2222 respectively and a a second arc-shaped rotating section 2321 or 2322 is provided accordingly, and the two ends of a respective locking recess 222, 232 are each provided with a concave return section 2223 or 2322 respectively.2323 are provided.

[0014] A fastening arrangement 40 serves to fasten the ratchet reversing control device 20 in the ratchet chamber 11 of the ratchet wrench head 10.

[0015] The reversing device 30 comprises a switching piece 31 and two engagement locking bores 321, 322 therein, wherein the engagement locking bores 321, 322 each correspond to the first and second locking blocks 22, 23, respectively, so that the ratchet teeth 221, 231 of the first and second locking blocks 22, 23 can each be brought into engagement with the tooth roots 211 and the tooth flanks 212 of the corresponding gear teeth 210 of the ratchet 21, wherein each engagement locking bore 321, 322 serves to receive the corresponding engagement locking head 331 or 332 and the engagement locking spring 341 or 342 arranged in the corresponding engagement locking head 331 or 332, respectively, so that the The elastically pressed locking springs 341, 342 of the locking heads 331, 332 can be pressed against the arc-shaped rotary sections 2221, 2222 and 2321, 2323 of the corresponding locking blocks 22 and 23, respectively.

[0016] It will be directed to the Fig. 2, Fig. 3 to Fig. 4 Reference is made to the ratchet wrench device according to the invention. The ratchet reversing control device 20 can be housed in the hollow ratchet chamber 11, whereby the ratchet teeth 221, 231 of the first and second locking blocks 22, 23 can each be brought into engagement with the tooth roots 211 and the tooth flanks 212 of the corresponding gear teeth 210, subsequently the ratchet reversing control device 20 is fastened in the ratchet chamber 11 of the ratchet wrench head 10 by means of the fastening arrangement 40.

[0017] Furthermore, the reversing device 30 is inserted into the reversing hole 12 of the ratchet wrench head 10. The locking heads 331, 332, which are housed in the corresponding locking bores 321, 322, are pressed by the elastic force of the corresponding locking springs 341, 342 such that the locking heads 331, 332 are pressed against the arcuate rotary sections 2221, 2321 of the corresponding locking blocks 22, 23 located on the same side.

[0018] When using the present invention, the ratchet teeth 221, 231 of the first and second locking blocks 22, 23 can each engage with the tooth roots 211 and tooth flanks 212 of the corresponding gear teeth 210 of the ratchet 21. Thus, when a workpiece (not shown) is rotated, the ratchet teeth 221, 231 of the first and second locking blocks 22, 23 are each engaged with the tooth roots 211 and tooth flanks 212 of the corresponding gear teeth 210. Since the first and second locking blocks 22, 23 are pressed by the first arc-shaped rotating section 2221 and 2321, respectively, located in the locking recess 222 and 232 of the contact locking head 331 and 332, the advantageous effect of pressing a workpiece can be achieved. In this case, the rotation angle of the gear teeth 210 of the entire ratchet reversing control device 20 is only about half of the original rotation angle, i.e.The original angle of rotation between the adjacent ratchet teeth 211 is converted into the angle of rotation between the root 211 of one gear tooth 210 and the flank 212 of the adjacent gear tooth 210. In this way, when operating the present invention, the user can achieve a minimal angle of rotation with a rotary motion, thereby eliminating space constraints and maximizing available space.

[0019] Furthermore, in the present invention, the locking recesses 222, 232 are each provided with corresponding first and second arcuate rotary sections 2221, 2222 and 2321, 2322, respectively, wherein the radius of the first and second arcuate rotary sections 2221, 2222 and 2321, 2322 is smaller than the arc radius of the corresponding locking recess 222, 232. The larger radius ensures that each contact locking head 331, 332 exerts a greater force component in the divided direction when pressed against the corresponding locking block 22 or 23 to actuate the ratchet 21. Furthermore, the ends of two sides of a respective locking recess 222, 232 are each provided with a concave return section 2223, 2323 to ensure the spatial limitation of the system locking heads 331, 332, so that they do not leave the arc-shaped rotation sections 2221, 2222 and 2321, 2322 of the corresponding locking blocks 21, 23.

[0020] If the present invention is to be used in the reverse direction, the locking heads 331, 332 can also be pressed against the arcuate rotary sections 2222 and 2323, respectively, located on the opposite side, by switching the switching piece 31. Likewise, the ratchet teeth 221, 231 of the first and second locking blocks 22, 23 can each be engaged with the tooth roots 213 and tooth flanks 214 of the ratchet teeth 210 of the ratchet 21 located on the opposite side. In the same way, when operating the present invention, the user can achieve a minimal angle of rotation with a rotary motion, thereby eliminating space constraints and maximizing available space.

[0021] Furthermore, in the present invention, according to the shape of the concave recess 13, the two sides of the first and second locking blocks 22, 23 are each provided with an arcuate section 223 and 233, respectively. Thus, when the first and second locking blocks 22, 23 are pressed, the arcuate sections 223 and 233 located on the two sides can be used as circular contact surfaces to press against the concave recess 13, with the angle of rotation ranging from -45° to 0° to 45°, thereby achieving an optimal pressing force.

[0022] It will be on Fig.Reference is made to Figure 7, which shows a schematic view of another embodiment of the present invention. In this embodiment, a third arc-shaped rotary section 2224, 2324 can additionally be provided in the center of the corresponding locking recess 222 or 232. In this way, the rotation angles of the first and second arc-shaped rotary sections 2221, 2222 and 2321, 2322 can be increased. The larger radius allows the contact locking head 331, 332 to exert a greater force component in the split direction when pressing against the locking block 22 or 23 to depress the ratchet 21. Furthermore, if a respective locking head 331, 332 is pressed against the corresponding third arcuate rotary section 2224 or 2324, it can be prevented that the corresponding locking block 22, 23 is pushed to one side, which allows for smoother engagement with the ratchet 21.

[0023] In summary, it can be said that the ratchet wrench device according to the invention fully meets the requirements of industrial development in terms of practicality and cost-efficiency. Reference symbol list 1 ratchet wrench head 2 ratchets 24 ratchet teeth 3 ratchet blocks Section 31 4 switching unit 5 switching piece 6 springs 7 Takeaway item 8 Investment-Lock-Deepening 9 operating wall 10 ratchet wrench heads 11 Ratchet Room 12 Reversal hole 13 concave depressions 20 ratchet reverse control device 21 ratchet 210 gear tooth 211, 213 Tooth base 212, 214 Tooth flank 22 first block 221 ratchet tooth 222 Exemption 223 arc section 2221 first arc-shaped turning section 2222 second arc-shaped rotation section 2223 Return section 23 second locking block 231 ratchet tooth 232 Blocking exemption 233 arc section 2321 first arc-shaped turning section 2322 second arc-shaped turning section 2323 Backstop section 2324 third arc-shaped rotary section 30 Reversing device 31 Switch piece 321, 322 Plant-barrier drilling 331, 332 Plant Locking Head 341, 342 Locking spring 40 Mounting arrangement

Claims

Ratchet wrench device comprising a ratchet wrench head (10) provided with a hollow ratchet chamber (11) and a reversing hole (12), wherein the ratchet chamber (11) of the ratchet wrench head (10) has a recess on one side of the reversing hole (12) formed in the form of a semicircular concave depression (13), the ratchet chamber (11) serving for the arrangement of a ratchet reversing control device (20) and the reversing hole (12) serving for the arrangement of a reversing device (30); wherein the ratchet reversing control device (20) comprises a cylindrical ratchet (21) provided with gear teeth (210) on its circumference, a first locking block (22) and a second locking block (23), wherein the side of the first and second locking blocks (22, 23) facing the gear teeth (210) is further provided with ratchet teeth (221 and 231, respectively) and the side of the gear teeth (210) opposite side with a locking recess (222 or232) is provided, according to the shape of the concave recess (13), the two sides of the first and second locking block (22, 23) are provided with an arc section (223 or 233), the ratchet teeth (221, 231) serve to engage with the gear teeth (210) of the ratchet (21), each locking recess (222, 232) is provided with a first arc-shaped rotating section (2221 or 2222) and a second arc-shaped rotating section (2321 or 2322) matched thereto, and the two ends of each locking recess (222, 232) are each provided with a concave return section (2223 or 2324).2323); wherein a fastening arrangement (40) serves to fasten the ratchet reversing control device (20) in the ratchet chamber (11) of the ratchet wrench head (10); wherein the reversing device (30) comprises a switching piece (31) and two engagement locking bores (321, 322) located therein, wherein the engagement locking bores (321, 322) each correspond to the first and second locking blocks (22, 23) so that the ratchet teeth (221, 231) of the first and second locking blocks (22, 23) can each be brought into engagement with the tooth roots (211, 213) and the tooth flanks (212, 214) of the corresponding gear teeth (210) of the ratchet (21), wherein a respective engagement locking bore (321, 322) is further provided for receiving of the corresponding system locking head (331 or 332) and the system locking spring (341 or 332) arranged in the corresponding system locking head (331 or 332).342) serves so that the contact locking heads (331, 332) which are elastically pressed by the corresponding contact locking springs (341, 342) can be pressed against the arc-shaped rotary sections (2221, 2222 or 2321, 2323) of the corresponding locking blocks (22 or 23) in order to achieve the advantageous effect of the main structure of the present invention. Ratchet wrench device according to claim 1, in which a third arc-shaped rotating section (2224, 2324) is additionally provided in the middle of the corresponding locking recess (222 or 232).

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