TW202417188A - Ratchet wrench structure - Google Patents

Abstract

The present invention relates to a ratchet wrench structure, which includes: a body is provided with a first receiving groove, a second receiving groove, a first annular groove and an abutment; the first receiving groove is provided with a first arc, a first axis, a first vertical line and a first radius, the second receiving groove is provided with a second arc, a second axis and a second radius, and a first distance is provided between the first axis and the second axis; a ratchet is pivotally arranged in the first receiving groove, and the ratchet is provided with a ratchet part, a sleeve part, a second annular groove and an abutment part; a tooth is accommodated in one side of the second receiving groove, and the tooth is provided with a bite tooth, an extension surface, an arc abutment surface and an arc side surface, and the arc side surface is against the wall surface of the second receiving groove; an elastic element is accommodated in the second receiving groove.

Description

Ratchet wrench structure

The present invention is related to a ratchet wrench structure, and in particular to a ratchet wrench structure which is only provided with the main body, the ratchet, the tooth, the elastic element and the retaining ring, thereby further saving the component cost of the ratchet wrench structure.

As we know, the commonly used ratchet wrench structure, such as US Patent No. 5979274, has the following structure: the main body is provided with a first receiving groove, a second receiving groove and a bullet receiving hole at the working end; the ratchet is pivotally arranged in the first receiving groove, and the ratchet is provided with a ratchet part and a polygonal groove; the tooth is accommodated in the second receiving groove, and the tooth is provided with a plurality of engaging teeth; the elastic element is accommodated in the bullet receiving hole, and the other end of the elastic element is against the tooth, so that the engaging teeth and the ratchet part are engaged.

However, the structural flaws of this US patent case 5979274 are:

The bullet hole 102 is drilled on the wall of the second groove. It is a difficult process to drill a bullet hole on the curved wall of the second groove. When drilling the bullet hole 102, in order to make the drill head avoid the wall of the first groove, the body needs to be tilted. The drill head is inserted into the second groove and aligned with the appropriate position of the curved wall to drill out the tilted bullet hole. That is, the bullet hole 102 is an inclined hole with three directions of X axis, Y axis and Z axis. The need to drill a bullet hole is a structural defect.

Another US patent case number: US7444903B1, its Taiwan patent application number is 096215809, certificate number M327769, a structural improvement of a ratchet wrench, which is composed of a wrench body, a locking ratchet block, a ratchet and a limit ring.

Compared with US Patent 5979274, this patent structure does not require drilling a bullet hole and has a relatively lower processing cost, but this patent structure also has the following shortcomings:

1. Please refer to the second figure of the patent publication. The ratchet wrench structure is composed of six components, namely, a wrench body 50, a locking ratchet block 60, a spring 64, a ratchet 70, a limit ring 80 and an elastic buckle 90. The six components are combined into a ratchet wrench structure, which is a more complex multi-component structure and increases the component cost.

2. The rear side of the locking ratchet block 60 is provided with a bullet-accommodating groove for accommodating the spring 64. After the locking ratchet block 60 is formed, a bullet-accommodating groove needs to be drilled. The rear side of the locking ratchet block 60 is also in an arc shape, and it is more difficult to drill a bullet-accommodating groove on the arc surface. As shown in the fourth figure, the bullet-accommodating groove is located at the highest point of the arc surface. When the drill bit rotates quickly and contacts the arc surface, the drill bit is easy to shift along the arc surface, and the position of the bullet-accommodating groove is easy to deviate. The need to drill a bullet-accommodating groove for the locking ratchet block 60 increases its processing cost. In addition, the diameter of the bullet-accommodating groove is not large. When a small drill bit drills a hole, the drill bit is very easy to break.

3. The sliding surface 62 is very close to the ratchet 71, that is, the gap between the two is very small. If the teeth are not smoothly advanced during rotation, the ratchet wrench's toothing principle relies on the elastic force and the coordination of the teeth to automatically advance the teeth. The elastic force and the teeth need to cooperate with each other. All ratchet wrenches will have some degree of unsmooth toothing. If the teeth are not smoothly advanced, the sliding surface 62 will easily rub against the ratchet 71 and wear the ratchet 71.

In view of the above-mentioned shortcomings of the conventional structure, the inventor, with his many years of experience in manufacturing, production and design in the relevant industry, finally came up with a ratchet wrench structure product that can solve the conventional shortcomings.

The conventional ratchet wrench structure is composed of six components, namely, the wrench body, the locking ratchet block, the spring, the ratchet, the limit ring and the elastic buckle. The ratchet wrench structure of the present invention is only composed of five components, namely, the body, the ratchet, the tooth, the elastic component and the buckle ring. The structure of only five components can further save the component cost of the ratchet wrench structure.

The present invention relates to a ratchet wrench structure, which includes: a body is provided with a first receiving groove, a second receiving groove, a first annular groove and an abutment; the first receiving groove is provided with a first arc, a first axis, a first vertical line and a first radius, the second receiving groove is provided with a second arc, a second axis and a second radius, and a first distance is provided between the first axis and the second axis; a ratchet is pivotally arranged in the first receiving groove, and the ratchet is provided with a ratchet part, a sleeve part, a second annular groove and an abutment part; a tooth is accommodated in one side of the second receiving groove, and the tooth is provided with a bite tooth, an extension surface, an arc abutment surface and a side arc surface, and the side arc surface is against the wall surface of the second receiving groove; an elastic element is accommodated in the second receiving groove.

The ratchet wrench structure is provided with only five components, namely, the body, the ratchet, the tooth, the elastic element and the buckle ring. The structure of the assembly of only five components saves the cost of one component. The second distance is equal to the first distance, that is, the values between the two are the same. The third distance is equal to the second distance, that is, the values between the two are the same. After the first distance is set, the values of the second distance and the third distance can be known. That is, when the body design is completed, the tooth can use the values of the body. The toothing structure is the third arc, the fourth arc, the arc contact surface and the fifth arc. The third arc is the first radius, the fourth arc is the second radius, and the fifth arc has the third radius. The toothing structure is simpler. Among various specifications, the toothing structure is easier to design for various specifications.

In order to enable the members of the Jun Bureau and those familiar with this technology to fully understand the effects of the present invention, the structure and composition of the present invention are explained below with diagrams and figure numbers. However, the following is only used to explain the implementation examples of the present invention and is not intended to limit the present invention in any form. Therefore, any modifications and changes made within the spirit of the present invention should still fall within the scope of protection of the present invention.

10: Body

11: First tank

12: Second container

13: First ring groove

14: Resistance

15: First arc

151: First axis

152: First vertical line

153: First radius

154: Second arc

155: Second axis

156: Second radius

157: First interval

20: Ratchet

21: Ratchet part

22: Fitting part

23: Second ring groove

24: Arrival

25: First lead angle

26: Second lead angle

30: Teeth making

31: Occlusal teeth

32: Extended surface

33: Arc contact surface

34: Curved edge

36: The third arc

361: The third axis

362: Second vertical line

363: The fourth arc

364: The fourth axis

365: The second interval

366: The fifth arc

367: The fifth axis

368: Third radius

369: The third interval

3691: The fourth interval

40: Elastic element

41: First end

42: Second end

50: Buckle

Figure 1 is a three-dimensional exploded view of the ratchet wrench structure of the present invention.

Figure 2 is a front view of the ratchet wrench structure of the present invention.

Figure 3 is a view of the ratchet wrench structure of the present invention before the teeth are formed.

Figure 4 is a three-dimensional assembly diagram of the ratchet wrench structure of the present invention.

Figure 5 is a side view of the teeth of the ratchet wrench structure of the present invention.

Figure 6 is a cross-sectional view of the ratchet wrench structure of the present invention at point A-A in Figure 5.

Figure 7 is a front view of the ratchet wrench structure of the present invention.

Figure 8 is a cross-sectional view of the ratchet wrench structure at B-B in Figure 7 of the present invention.

Figure 9 is a side view of the ratchet of the ratchet wrench structure of the present invention.

First, please refer to Figures 1 to 4. Figure 1 is a three-dimensional exploded view of the ratchet wrench structure of the present invention, Figure 2 is a front view of the ratchet wrench structure body 10 of the present invention, Figure 3 is a front view of the ratchet wrench structure of the present invention before the teeth are made, and Figure 4 is a three-dimensional assembly view of the ratchet wrench structure of the present invention. The present invention is about a ratchet wrench structure, which includes:

A body 10, the body 10 is provided with a first receiving groove 11, a second receiving groove 12 is provided on one side of the first receiving groove 11, the axis of the second receiving groove 12 is located within the range of the first receiving groove 11, the upper and lower sides of the second receiving groove 12 are closed, the first receiving groove 11 and the second receiving groove 12 are in communication, the body 10 is provided with a first annular groove 13, and a butt 14 is provided at the bottom of the first receiving groove 11;

The first receiving groove 11 is provided with a first arc 15, and the first arc 15 is provided with a first axis 151. A first vertical line 152 is provided through the first axis 151. The first arc 15 has a first radius 153. The second receiving groove 12 is provided with a second arc 154, and the second arc 154 has a second axis 155. The second axis 155 coincides with the first vertical line 152 at one point, and the two cross each other to form a point. The second arc 154 has a second radius 156, and there is a first distance 157 between the first axis 151 and the second axis 155.

A ratchet 20, the ratchet 20 is pivoted in the first receiving groove 11, the outer periphery of the ratchet 20 is provided with a ratchet portion 21 with annularly arranged teeth, the ratchet 20 is provided with a sleeve portion 22, the sleeve portion 22 is in the shape of a polygonal groove, the ratchet 20 is provided with a second annular groove 23, the second annular groove 23 is aligned with the first annular groove 13, the ratchet 20 is provided with a smaller diameter abutment portion 24, the abutment portion 24 abuts against the abutment 14;

A tooth 30, which is accommodated in one side of the second groove 12, and a bite tooth 31 is provided on the front side of the tooth 30, which is engaged with the ratchet part 21, and an extension surface 32 is provided on one side of the bite tooth 31, and an arc surface 33 is provided on the rear side of the tooth 30, and a side arc surface 34 is provided on one side of the tooth 30, and the side arc surface 34 is against the wall of the second groove 12, and the side arc surface 34 is connected to the arc surface 33, or a guide radius is provided between the side arc surface 34 and the arc surface 33;

The engaging teeth 31 form a third arc 36, the third arc 36 is provided with a third axis 361, a second vertical line 362 is provided through the third axis 361, and the engaging teeth 31 are all located on one side of the second vertical line 362; the side arc surface 34 forms a fourth arc 363, the fourth arc 363 is provided with a fourth axis 364, the fourth axis 364 coincides with the second vertical line 362 at one point, and there is a second spacing 365 between the third axis 361 and the fourth axis 364;

The third arc 36 is of the same diameter as the first arc 15, the third axis 361 is coincident with the first axis 151, the second vertical line 362 is coincident with the first vertical line 152, the fourth arc 363 is of the same diameter as the second arc 154, the fourth axis 364 is coincident with the second axis 155, the third arc 36 is the first radius 153, i.e. the values are the same, the fourth arc 363 is the second radius 156, i.e. the values are the same, i.e. the engaging tooth 31 is matched with the first receiving groove 11, and the side arc surface 34 is matched with the second receiving groove 12;

The arc abutment surface 33 forms a fifth arc 366, and the fifth arc 366 has a fifth axis 367. The fifth axis 367 is not within the range of the fourth arc 363. The fifth axis 367 and the second vertical line 362 coincide at one point. The third axis 361, the fourth axis 364 and the fifth axis 367 all coincide at one point with the second vertical line 362. The fifth arc 366 has a third radius 368, and there is a third distance 369 between the fifth axis 367 and the third axis 361.

The radius of the extension surface 32 is larger than the radius of the third arc 36, the axis of the extension surface 32 is also the third axis 361, the radius of the extension surface 32 and the radius of the third arc 36 have a fourth distance 3691, and the fourth distance 3691 is smaller than half the tooth height of the occlusal tooth 31;

The body 10 has various specifications in various metric specifications, imperial specifications or other standard specifications. The specifications and sizes of the body 10 are more than twenty. In each specification, the values of the first radius 153 and the second radius 156 are integers, the value of the first spacing 157 is also an integer, and the third radius 368 is preferably also an integer. The third radius 368 is greater than the first radius 153, the first radius 153 is greater than the second radius 156, the second radius 156 is greater than the first spacing 157, the second spacing 365 is equal to the first spacing 157, that is, the values between the two are the same, and the third spacing 369 is equal to the second spacing 365, that is, the values between the two are the same;

The third radius 368 is less than twice the first radius 153, the first radius 153 is 1.20 to 1.30 times the second radius 156, or the first radius 153 is 1.25 times the second radius 156, the second radius 156 is 1.4 to 1.5 times the second spacing 157, or the second radius 156 is 1.4 to 1.45 times the second spacing 157, which is the numerical relationship between various radii;

An elastic element 40 is accommodated in the second receiving groove 12. The elastic element 40 has a first end 41 and a second end 42. The diameter of the first end 41 is larger than the diameter of the second end 42. Due to the diameter difference between the first end 41 and the second end 42, the elastic element 40 is in the shape of a conical elastic body. The diameter of the first end 41 is slightly equal to the height of the second receiving groove 12, so that the elastic element 40 is not easy to move up and down in the second receiving groove 12. The first end 41 is against the wall of the second receiving groove 12, and the second end 42 is accommodated against the arc surface 33, so that the side arc surface 34 is against the wall of the second receiving groove 12;

The positional relationship between the fifth arc 366 and the second arc 154, i.e., the axial relationship between the fifth axis 367 and the second axis 155 and the radius relationship between the third radius 368 and the second radius 156, enables the middle of the second receiving groove 12 and the arc abutment surface 33 to have the largest space, and the elastic element 40 is located in the middle of the second receiving groove 12, i.e., the first vertical line 152 will pass through the elastic element 40;

A buckle ring 50, which is C-shaped and slightly elastic, is received in the first annular groove 13 and the second annular groove 23, so that the ratchet 20 is pivoted at the first receiving groove 11.

Please continue to refer to Figures 5 and 6. Figure 5 is a side view of the present invention, and Figure 6 is a cross-sectional view of Figure 5 taken along line A-A. The ratchet 22 is pivoted in the first receiving groove 11, the tooth 30 is received in the second receiving groove 12, the elastic element 40 is received in the second receiving groove 12, the first end 41 is received against the wall of the second receiving groove 12, the second end 42 is received against the arcuate surface 33, so that the engaging tooth 31 is engaged with the ratchet part 21, and the side arc surface 34 is received against the wall of the second receiving groove 12;

When retreating, the body 10 rotates counterclockwise, the extension surface 32 and the ratchet part 21 have the fourth spacing 3691, the control tooth 30 retreats, and the engaging tooth 31 is disengaged from the ratchet part 21.

Please refer to Figures 7 and 8. Figure 7 is a view before the present invention, and Figure 8 is a cross-sectional view of Figure 7 taken at B-B. The second annular groove 23 is aligned with the first annular groove 13, the abutment 24 abuts against the abutment 14, the buckle ring 50 is accommodated in the first annular groove 13 and the second annular groove 23, so that the ratchet 20 is pivoted in the first receiving groove 11, and the diameter of the first end 41 is slightly equal to the height of the second receiving groove 12;

Please continue to refer to FIG. 9, which is a side view of the ratchet 20 of the ratchet wrench structure of the present invention. The upper and lower ends of the ratchet part 21 are provided with a first chamfer 25 and a second chamfer 26. The first chamfer 25 is in a trapezoidal shape, and the second chamfer 26 is in an oblique angle shape. The first chamfer 25 and the second chamfer 26 are turned by a turning tool method to remove the burrs at both ends of the ratchet part 21.

The third arc 36 described in the present invention is equivalent to the first arc 15, but because there is a matching relationship between the two components, there will be a preset tolerance in the matching relationship, that is, when the first radius 153 is a certain value, the radius of the third arc 36 will be slightly larger than the first radius 153.

In another embodiment of the present invention, the fitting portion 22 may be a protruding square head to fit the sleeve.

The advantages of the ratchet wrench structure design of the present invention are:

1. The ratchet wrench structure is only provided with five components, namely, the body 10, the ratchet 20, the tooth 30, the elastic element 40 and the buckle 50. The structure of only five components is assembled, thereby saving the cost of one component.

2. The second spacing 365 is equal to the first spacing 157, that is, the values between the two are the same, and the third spacing 369 is equal to the second spacing 365, that is, the values between the two are the same. After the first spacing 157 is set, the values of the second spacing 365 and the third spacing 369 can be known, that is, when the design of the body 10 is completed, the tooth 30 can use the values of the body 10.

3. The structure of the toothing 30 is the third arc 36, the fourth arc 363, the arc abutment surface 32 and the fifth arc 366. The third arc 36 is the first radius 153, the fourth arc 363 is the second radius 156, and the fifth arc 366 has the third radius 368. The structure of the toothing 30 is simpler. Among various size specifications, the structure of the toothing 30 is easier to design for various size specifications.

4. Referring to FIG. 3, when designing the various specifications of the tooth 30, the tooth 30 can be designed by first setting the first radius 153, the second radius 156 and the third radius 368, the second spacing 365 and the third spacing 369 equal to the first spacing 157, and the fourth axis 364 and the fifth axis 367 are both set on the first vertical line 152 and the second vertical line 362 to draw the tooth 30. The tooth 30 is first symmetrically arranged with respect to the first vertical line 152, and then the engaging tooth 31 on the left side of the first vertical line 152 is completely removed to draw the extension surface 32, and then the volume of the leftmost end of the tooth 30 is removed for the purpose of tooth removal, so that the tooth 30 can be drawn. The tooth 30 is structured with various numbers, which can save the design time of each tooth 30 of various specifications and dimensions.

5. Many softwares have mathematical relationships when they are designed. The values of the gear 30 can be assimilated with the values of the body 10 by mathematical relationships. Some values of the gear 30 can be defaulted.

6. The elastic element 40 is conical and accommodated in the second receiving groove 12. The first end 41 of the elastic element 40 abuts against the wall of the second receiving groove 12, and the second end 42 abuts against the arc abutment surface 33 of the toothing 30. The meshing tooth 31 of the toothing 30 and the ratchet part 21 of the ratchet 20 are more surely engaged.

7. There is a fourth distance 3691 between the extension surface 32 and the ratchet part 21. The fourth distance 3691 provides a margin for rotation. If the toothing is not smooth, the ratchet part 21 will not rub against the extension surface 32.

Therefore, the ratchet wrench structure of this invention has industrial applicability, novelty and advancement, and can truly meet the application requirements for invention patents, so an application is filed in accordance with the law.

10: Body

11: First tank

12: Second container

13: First ring groove

14: Resistance

20: Ratchet

21: Ratchet part

22: Fitting part

23: Second ring groove

24: Arrival

30: Teeth making

31: Occlusal teeth

32: Extended surface

33: Arc contact surface

34: Curved edge

40: Elastic element

41: First end

42: Second end

50: Buckle

Claims (6)

A ratchet wrench structure, comprising: A body, the body is provided with a first receiving groove, a second receiving groove is provided on one side of the first receiving groove, the axis of the second receiving groove is located within the range of the first receiving groove, the upper and lower sides of the second receiving groove are closed, the first receiving groove and the second receiving groove are in communication, the body is provided with a first annular groove, and an abutment is provided at the bottom end of the first receiving groove; The first groove is provided with a first arc, the first arc is provided with a first axis, a first vertical line is provided through the first axis, the first arc has a first radius, the second groove is provided with a second arc, the second arc has a second axis, the second axis coincides with the first vertical line at a point, the second arc has a second radius, and a first distance exists between the first axis and the second axis; A ratchet, the ratchet is pivoted in the first receiving groove, the outer periphery of the ratchet is provided with a ratchet portion with annularly arranged teeth, the ratchet is provided with a sleeve portion, the ratchet is provided with a second annular groove, the second annular groove is aligned with the first annular groove, the ratchet is provided with a smaller diameter abutment portion, the abutment portion abuts against the abutment edge; A tooth, which is accommodated in one side of the second groove, a bite tooth is provided on the front side of the tooth, the bite tooth is engaged with the ratchet part, an extension surface is provided on one side of the bite tooth, an arc abutment surface is provided on the rear side of the tooth, and a side arc surface is provided on one side of the tooth, and the side arc surface is against the wall surface of the second groove; The meshing teeth form a third arc, the third arc is provided with a third axis, a second vertical line is provided through the third axis, and the meshing teeth are all located on one side of the second vertical line; the side arc surface forms a fourth arc, the fourth arc is provided with a fourth axis, the fourth axis coincides with the second vertical line at one point, and there is a second distance between the third axis and the fourth axis; The third arc is of the same diameter as the first arc, the third axis coincides with the first axis, the second vertical line coincides with the first vertical line, the fourth arc is of the same diameter as the second arc, the fourth axis coincides with the second axis, the third arc is the first radius, i.e. the values are the same, the fourth arc is the second radius, i.e. the values are the same, i.e. the engaging tooth matches the first groove, and the side arc surface matches the second groove; The arc abutment surface forms a fifth arc, the fifth arc has a fifth axis, the fifth axis is not within the range of the fourth arc, the fifth axis coincides with the second vertical line at a point, the third axis, the fourth axis and the fifth axis all coincide with the second vertical line at a point, the fifth arc has a third radius, and there is a third distance between the fifth axis and the third axis; The radius of the extension surface is larger than the radius of the third arc, the axis of the extension surface is also the third axis, the radius of the extension surface and the radius of the third arc have a fourth distance, and the fourth distance is less than half the tooth height of the occlusal tooth; The values of the first radius and the second radius are integers, the value of the first distance is also an integer, the third radius is preferably also an integer, the third radius is larger than the first radius, the first radius is larger than the second radius, the second radius is larger than the first distance, the second distance is equal to the first distance, that is, the values between the two are the same, the third distance is equal to the second distance, that is, the values between the two are the same; An elastic element, which is accommodated in the second receiving groove, has a first end and a second end, the diameter of the first end is larger than the diameter of the second end, and the diameter difference between the first end and the second end makes the elastic element a conical elastic body, the diameter of the first end is slightly equal to the height of the second receiving groove, so that the elastic element is not easy to move up and down in the second receiving groove, the first end is against the wall of the second receiving groove, and the second end is accommodated against the arc surface, so that the side arc surface is against the wall of the second receiving groove; The positional relationship between the fifth arc and the second arc, i.e. the axial relationship between the fifth axis and the second axis and the radius relationship between the third radius and the second radius, enables the second groove and the middle of the arc abutment surface to have the maximum space, and the elastic element is located in the middle of the second groove, i.e. the first vertical line will pass through the elastic element; A buckle ring, which is C-shaped and slightly elastic, is received in the first annular groove and the second annular groove, so that the ratchet is pivoted in the first receiving groove. The ratchet wrench structure as described in claim 1, wherein the fitting portion is in the shape of a polygonal groove, or the fitting portion can be in the shape of a protruding quadrilateral head. A ratchet wrench structure as described in claim 1, wherein the side arc surface is connected to the arc abutment surface, or a rounded corner is provided between the side arc surface and the arc abutment surface. A ratchet wrench structure as described in claim 1, wherein the third radius is less than twice the first radius, the first radius is 1.20 to 1.30 times the second radius, or the first radius is 1.25 times the second radius, the second radius is 1.4 to 1.5 times the second spacing, or the second radius is 1.4 to 1.45 times the second spacing. A ratchet wrench structure as described in claim 1, wherein the upper and lower ends of the ratchet portion are provided with a first chamfer and a second chamfer, the first chamfer is in a trapezoidal shape, and the second chamfer is in an oblique angle shape. As described in claim 1, the ratchet wrench structure, wherein the third arc is equal to the first arc, but because there is a matching relationship, there will be a preset tolerance in the matching relationship, and when the first radius is a certain value, the radius of the third arc will be slightly larger than the first radius.

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