Square tenon switching structure of ratchet head

Abstract

The utility model discloses a square tenon switching structure of a ratchet head, and relates to the field of ratchet wrenches, the square tenon switching structure comprises a ratchet body and a square tenon with a pin, a rotating mandrel is arranged between the ratchet body and the square tenon with the pin, and two sets of sliding mechanisms are arranged in parallel in the axial direction of the square tenon with the pin. A limiting mechanism for preventing the square tenon with the pin from falling off is arranged between the two sets of sliding mechanisms, the sliding assemblies are perpendicular to the limiting mechanism, two single-edge square hole positioning grooves used in cooperation with the stopping mechanisms are formed in the inner wall of the rotating mandrel, and two sets of fixing assemblies for disassembling and assembling the rotating mandrel are arranged on the ratchet wheel body. A pawl mechanism used in cooperation with the ratchet wheel body is further arranged on the rotating mandrel. Under the cooperation of the limiting mechanism and the single-side square hole positioning groove, in the vertical switching process of the square tenon with the pin, the rotating mandrel cannot fall off, and the effect of repeated connection is avoided.

Description

A square tenon switching structure for a ratchet head Technical Field

[0001] This application relates to the field of ratchet wrenches, and in particular to a square tenon switching structure for a ratchet head. Background Technology

[0002] A ratchet wrench is a hand tool that utilizes the unidirectional transmission characteristic of a ratchet mechanism to tighten or loosen bolts, nuts, and other fasteners without continuous rotation of the handle, greatly improving work efficiency. Furthermore, ratchet wrenches can be paired with sockets of various sizes to accommodate fasteners of different dimensions, meeting diverse work needs and providing convenience for production and maintenance work across various industries.

[0003] In traditional ratchet wrenches, to reverse the operation, the square tenon needs to be switched to the top, and then the wrench needs to be rotated 180 degrees. Meanwhile, to ensure the stability of the connection between the square tenon and the rotating spindle, a steel ball is usually placed on the square tenon. This steel ball presses against a recessed hole inside the rotating spindle, allowing the wrench to work stably during normal use.

[0004] Because the stiffness of the spring attached to the steel ball is difficult to control precisely, and the depth of the recessed hole on the rotating mandrel varies, the square tenon is prone to falling off the rotating mandrel during actual use. Once the square tenon falls off, it disrupts the normal operating procedure and reduces work efficiency. Summary of the Invention

[0005] To address the issue of the square tenon falling off and rotating the spindle when the operator switches the square tenon up and down to reverse the operation of the wrench, thereby affecting the normal operation process and reducing work efficiency, this application provides a square tenon switching structure for a ratchet head.

[0006] The ratchet head square tenon switching structure provided in this application adopts the following technical solution:

[0007] A ratchet head square tenon switching structure includes a ratchet body and a square tenon with a pin. A rotating spindle is provided between the ratchet body and the square tenon with the pin. Two sets of sliding mechanisms are arranged parallel to the axis of the square tenon with the pin. A limiting mechanism to prevent the square tenon with the pin from falling off is provided between the two sets of sliding mechanisms. The sliding components are arranged perpendicular to the limiting mechanism. Two single-sided square hole positioning grooves are opened on the inner wall of the rotating spindle for use with the blocking mechanism. Two sets of fixing components for detaching and assembling the rotating spindle are provided on the ratchet body. A pawl mechanism for use with the ratchet body is also provided on the rotating spindle.

[0008] By adopting the above technical solution, the sliding mechanism assists the axial movement of the dowel pin. The single-sided square hole positioning groove, in conjunction with the limiting mechanism, prevents the dowel pin from falling out of the rotating spindle. The fixing component facilitates the assembly and disassembly of the rotating spindle. The pawl mechanism, in conjunction with the ratchet body, achieves unidirectional transmission. This prevents the dowel pin from falling out of the rotating spindle during up-and-down switching, ensuring normal operation.

[0009] Optionally, the sliding mechanism includes a receiving groove formed on the tenon with a pin, a positioning steel ball disposed in the receiving groove, a steel ball spring disposed between the positioning steel ball and the receiving groove, one end of the steel ball spring being fixed to the inner wall of the receiving groove, and the other end of the steel ball spring being fixed to the steel ball spring.

[0010] By adopting the above technical solution, the receiving groove is used to place the positioning steel ball and the steel ball spring. Under the elastic force of the steel ball spring, the positioning steel ball makes elastic contact with the inner wall of the rotating spindle, so that the tenon with pin can slide on the inner wall of the rotating spindle.

[0011] Optionally, the limiting mechanism includes a receiving groove formed on the tenon with pin and a tenon positioning spring set in the receiving groove. A tenon positioning pin spring is provided between the tenon positioning spring and the receiving groove. One end of the tenon positioning pin spring is fixed to the inner wall of the receiving groove, and the other end of the tenon positioning pin spring is fixed to the tenon positioning spring.

[0012] By adopting the above technical solution, a receiving groove is also made on the tenon with pin. A tenon positioning spring is set in the receiving groove and connected by the tenon positioning spring, thereby realizing the elastic contact between the tenon positioning spring and the rotating spindle, which facilitates the sliding of the tenon with pin on the rotating spindle.

[0013] Optionally, the single-sided square hole positioning groove includes a first groove formed on the rotating spindle and a second groove formed on the first groove, with each adjacent side of the two second grooves being arc-shaped.

[0014] By adopting the above technical solution, the first groove and the second groove form a single-sided square hole positioning groove, providing a limiting fit for the tenon positioning spring pin. Furthermore, the adjacent sides of the two second grooves are both arc-shaped, ensuring that the tenon with the pin can only slide between the ends of the two single-sided square hole positioning grooves. However, when it reaches the end of the single-sided square hole positioning groove, the first groove blocks the tenon positioning spring pin, stopping it from moving further and ensuring that the tenon with the pin will not fall off and rotate the spindle.

[0015] Optionally, one of the single-sided square hole positioning grooves has a positioning pin ejection hole for use with a tenon positioning spring pin.

[0016] By adopting the above technical solution, the small round rod is placed into the positioning pin ejection hole, the dove with pin is pressed into the receiving groove, and the dove with pin is axially pressed to remove it, which is simple to operate.

[0017] Optionally, the inner wall of the rotating spindle is provided with a plurality of recessed holes for fitting positioning steel balls.

[0018] By adopting the above technical solution, the positioning steel ball, under the elastic force of the steel ball spring, can cooperate with the concave hole on the inner wall of the rotating spindle to play the role of positioning pin and tenon.

[0019] Optionally, the two sets of fixing components are respectively disposed at both ends of the ratchet body. The fixing components include a shim disposed between the ratchet body and the rotating spindle, and a retaining ring is engaged between the shim and the rotating spindle.

[0020] By employing the above technical solution, using shims and retaining rings, the rotating spindle can be fixed inside the ratchet body. To remove the rotating spindle, simply remove the shims and retaining rings; the operation is simple.

[0021] Optionally, the pawl mechanism includes a plurality of pawl bodies arranged around the circumference of the rotating spindle. The center of the rotating spindle is provided with a mounting groove along the circumference, and a retaining spring is provided in the mounting groove. The retaining spring continuously applies elastic force to the pawl body.

[0022] By adopting the above technical solution, multiple pawl bodies arranged circumferentially around the rotating spindle can achieve a unidirectional drive function for the ratchet, thus satisfying the tightening or loosening operation of the wrench. The mounting slot is used to install the retaining spring, which continuously applies elastic force to the pawl body, ensuring reliable engagement between the pawl body and the ratchet, thereby ensuring that the wrench can be used in one direction.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The sliding mechanism and the recessed hole work together to switch the dowel with pin up and down. One set of sliding mechanisms is used to fix the dowel with pin on the rotating spindle, and the other set of sliding mechanisms is used to fix the sleeve for disassembling and assembling fasteners on the dowel with pin;

[0025] 2. With the cooperation of the limiting mechanism and the single-sided square hole positioning groove, when switching the pin-shaped square tenon up and down, it can prevent the pin-shaped square tenon from falling off the rotating spindle, ensuring the normal use of the wrench. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 is an overall schematic diagram of the wrench provided in the embodiment of this application;

[0028] Figure 2 is a vertical sectional view of the switching structure provided in the embodiment of this application;

[0029] Figure 3 is a schematic diagram of the rotating mandrel provided in an embodiment of this application, used to show the pawl body and the mounting groove;

[0030] Figure 4 is a schematic diagram of the snap ring provided in an embodiment of this application, used to show the positional relationship between multiple pawl bodies and the snap ring;

[0031] Figure 5 is a partial cross-sectional view of the pin spring provided in the embodiment of this application, used to illustrate the sliding mechanism and the limiting mechanism;

[0032] Figure 6 is a partial cross-sectional view of the rotating mandrel provided in the embodiment of this application, used to show the single-sided square hole positioning groove and the concave hole;

[0033] Reference numerals: 1. Ratchet body; 2. Square tenon with pin; 3. Rotating spindle; 4. Sliding mechanism; 41. Receiving groove; 42. Positioning steel ball; 43. Steel ball spring; 5. Limiting mechanism; 51. Receiving groove; 52. Square tenon positioning spring; 53. Square tenon positioning pin spring; 6. Single-sided square hole positioning groove; 61. First groove; 62. Second groove; 7. Fixing component; 71. Washer; 72. Retaining ring; 8. Pawl mechanism; 81. Pawl body; 82. Mounting groove; 83. Snap ring; 9. Positioning pin ejection hole; 10. Concave hole. Detailed Implementation

[0034] The present application will be further described in detail below with reference to Figures 1-6.

[0035] This application discloses a square tenon switching structure for a ratchet head.

[0036] Referring to Figures 1 and 2, a ratchet head tenon switching structure includes a ratchet body 1 and a tenon 2 with a pin, with a rotating spindle 3 disposed between the ratchet body 1 and the tenon 2. Fixing components 7 are provided at both ends of the ratchet body 1 and the tenon 2 in a parallel direction. The fixing components 7 are used to fix the rotating spindle 3 inside the ratchet body 1, preventing the rotating spindle 3 from detaching from the ratchet body 1 during use.

[0037] Referring to Figures 1 and 2, the fixing assembly 7 includes a washer 71 and a retaining ring 72. The washer 71 is disposed between the ratchet body 1 and the tenon 2. Furthermore, the size of the washer 71 is not smaller than the size of the rotating spindle 3, thereby protecting the rotating spindle 3 and preventing it from falling out of the inner wall of the ratchet body 1. Additionally, the retaining ring 72 is snapped and fixed between the washer 71 and the tenon 2, further limiting and fixing the rotating spindle 3.

[0038] Referring to Figures 3 and 4, a pawl mechanism 8 is provided on the rotating spindle 3 to cooperate with the ratchet body 1. The pawl mechanism 8 includes multiple pawl bodies 81, a mounting groove 82, and a retaining ring 83. The multiple pawl bodies 81 are distributed around the circumference of the rotating spindle 3. The pawl body 81 is generally a claw-shaped component made of metal, one end of which engages with the teeth of the ratchet body 1 to achieve unidirectional transmission. The mounting groove 82 is an annular groove formed in the middle of the rotating spindle 3 for mounting the retaining ring 83.

[0039] Referring to Figure 4, the snap ring 83 is a broken-off annular elastic metal sheet. When the rotating spindle 3 rotates, the multiple pawl bodies 81 tighten towards the center under the elastic force of the snap ring 83, thereby causing the force-bearing end of the pawl body 81 to always be raised, engaging or disengaging with the teeth inside the ratchet body 1, thus realizing the function of unidirectional rotation, allowing the unidirectional wrench to easily install and remove fasteners.

[0040] To reverse the operation of the wrench, first remove the socket from the dowel 2, then switch the dowel axially to the top and fix the socket back onto the dowel 2. Finally, rotate the wrench 180 degrees to achieve the desired result.

[0041] Referring to Figure 5, two sets of sliding mechanisms 4 for moving the tenon 2 are arranged parallel to each other along the axial direction of the tenon 2. One set of sliding mechanisms is used to fix the tenon 2 on the rotating spindle 3, and the other set of sliding mechanisms 4 is used to fix the sleeve for assembling and disassembling fasteners.

[0042] Referring to Figure 6, multiple recessed holes 10 are provided on the inner wall of the rotating spindle 3 to cooperate with the sliding mechanism 4. With the cooperation of the two sets of sliding mechanisms 4 and the recessed holes 10, the up and down switching of the tenon 2 with pin can be realized.

[0043] Referring to Figure 5, a limiting mechanism 5 is also provided between the two sets of sliding mechanisms 4 to prevent the tenon 2 with pin from falling off. The sliding mechanism 4 and the limiting mechanism 5 are arranged perpendicularly.

[0044] Referring to Figure 6, two single-sided square hole positioning grooves 6 are also provided on the inner wall of the rotating spindle 3 to cooperate with the limiting mechanism 5. With the cooperation of the limiting mechanism 5 and the single-sided square hole positioning grooves 6, the pin and tenon 2 will not disengage from the rotating spindle 3 when switching up and down, thus ensuring the normal use of the wrench.

[0045] Referring to Figure 5, the sliding mechanism 4 includes a receiving groove 41, a positioning steel ball 42, and a steel ball spring. The receiving groove 41 is formed on the dovetail 2 and is used to receive the positioning steel ball 42 and the steel ball spring 43. The positioning steel ball 42 is usually made of metal, with a smooth surface and a spherical shape. The steel ball spring 43 is disposed between the positioning steel ball 42 and the receiving groove 41, with one end of the steel ball spring 43 fixed to the inner wall of the receiving groove 41 and the other end fixed to the positioning steel ball 42. The steel ball spring 43 is generally a helical metal spring, which can provide elastic force to ensure that the positioning steel ball 42 is tightly pressed against the inner wall of the rotating spindle 3.

[0046] Referring to Figures 5 and 6, when the wrench needs to be operated in reverse to switch the square tenon to the top, during the movement of the square tenon 2 with pin, because the recess is set with an arc edge, the recess can squeeze the positioning steel ball 42, so that the positioning steel ball 42 can retract into the receiving groove 41. When the square tenon 2 with pin moves to the corresponding position of the recess, one set of positioning steel balls 42, under the reset action of the steel ball spring 43, can lock the moved positioning steel ball 42 into the corresponding position of the recess 10 set in the inner wall of the rotating spindle 3. Thus, with the cooperation of the sliding mechanism 4 and the recess, the square tenon 2 with pin plays a role in positioning and fixing.

[0047] Referring to Figures 5 and 6, the limiting mechanism 5 includes a receiving groove 51, a square tenon positioning spring 52, and a square tenon positioning spring 53. The receiving groove 51 is also created on the square tenon 2 with a pin, and is used to house the square tenon positioning spring 52 and the square tenon positioning spring 53. One end of the square tenon positioning spring 53 is fixed to the inner wall of the receiving groove 51, and the other end is fixed to the square tenon positioning spring 52. The square tenon positioning spring 52 is a metal rod-shaped structure with a rounded head, facilitating its engagement with the single-sided square hole positioning groove 6 on the rotating spindle 3.

[0048] Referring to Figure 6, both single-sided square hole positioning grooves 6 are provided on the inner wall of the rotating spindle 3. Each single-sided square hole positioning groove 6 includes a first groove 61 formed on the rotating spindle 3 and a second groove 62 formed on the first groove 61. The adjacent sides of the two second grooves 62 are both arc-shaped, allowing the square tenon positioning spring pin 52 to slide between the two single-sided square hole positioning grooves 6.

[0049] Referring to Figure 6, in this embodiment, the two first grooves 61 are stepped on the opposite side. When the square tenon positioning spring pin 52 moves to the end of the single-sided square hole positioning groove 6, the first groove 61 blocks it due to the ejection of the square tenon positioning spring pin 52, causing it to stop in the first groove 61 and stop moving, thereby ensuring that the pin-shaped square tenon 2 will not disengage from the rotating spindle 3.

[0050] Referring to Figures 5 and 6, the dovetail 2 is switched up and down. When the dovetail 2 passes through the middle section of the single-sided square hole positioning groove 6, the slope of the single-sided square hole positioning groove 6 will squeeze the dovetail positioning spring pin 52, and under the action of the dovetail positioning pin spring 53, the dovetail positioning spring pin 52 will be pressed into the receiving groove 51. Continuing to move the dovetail 2, the dovetail positioning spring pin 52 will pop out along the slope of the other single-sided square hole positioning groove 6 under the reset action of the dovetail positioning pin spring 53, until it is stopped by the end. With the cooperation of the limiting mechanism 5 and the two single-sided square hole positioning grooves 6, the dovetail 2 can be guaranteed not to disengage from the rotating spindle 3 when switching up and down, thus ensuring the normal use of the wrench. This solves the problem of having to repeatedly connect when switching dovetails in traditional wrenches, improving work efficiency.

[0051] Referring to Figure 6, in order to facilitate the removal of the square tenon 2 with pin during maintenance, a positioning pin ejection hole 9 is provided on one of the single-sided square hole positioning grooves 6, and the positioning pin ejection hole 9 passes through the rotating spindle 3.

[0052] Referring to Figures 2 and 6, to remove the tenon 2 with pin, first release the fixing effect of the washer 71 and the retaining ring 72 on the rotating spindle 3, allowing the rotating spindle 3 to be easily removed. Then, move the pawl body 81 along the circumferential direction of the retaining spring 83 to the broken end and remove the pawl body 81. Then, use a small round rod that can be inserted into the positioning pin ejection hole 9 to press the tenon positioning spring pin 52 into the receiving groove 51, while simultaneously pressing the tenon 2 axially, thus removing the tenon 2 with pin.

[0053] The implementation principle of the ratchet head square tenon switching structure in this application embodiment is as follows: With the cooperation of the sliding mechanism 4 and the recessed hole 10, the square tenon 2 with pin can be switched up and down. One set of sliding mechanisms 4 is used to initially fix the square tenon 2 with pin on the rotating spindle 3, and the other set of sliding mechanisms 4 is used to fix the sleeve on the square tenon 2 with pin. With the cooperation of the limiting mechanism 5 and the single-sided square hole positioning groove 6, the square tenon 2 with pin is prevented from falling off the rotating spindle 3 during up and down switching. Compared with traditional ratchet wrenches, the switching structure of this solution ensures that the square tenon 2 with pin will not fall off the rotating spindle 3 during up and down switching, solving the problem of repeatedly connecting traditional square tenons and improving the work efficiency of the user.

[0054] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A square tenon switching structure for a ratchet head, characterized in that: The device includes a ratchet body (1) and a tenon with a pin (2). A rotating spindle (3) is provided between the ratchet body (1) and the tenon with a pin (2). Two sets of sliding mechanisms (4) are arranged parallel to the axial direction of the tenon with a pin (2). A limiting mechanism (5) is provided between the two sets of sliding mechanisms (4) to prevent the tenon with a pin (2) from falling off. The sliding mechanism and the limiting mechanism (5) are arranged perpendicularly. Two single-sided square hole positioning grooves (6) are opened on the inner wall of the rotating spindle (3) to cooperate with the blocking mechanism. Two sets of fixing components (7) for assembling and disassembling the rotating spindle (3) are provided on the ratchet body (1). A pawl mechanism (8) for cooperating with the ratchet body (1) is also provided on the rotating spindle (3).

2. The ratchet head square tenon switching structure according to claim 1, characterized in that: The sliding mechanism (4) includes a receiving groove (41) opened on the tenon (2) with pin, a positioning steel ball (42) disposed in the receiving groove (41), and a steel ball spring (43) disposed between the positioning steel ball (42) and the receiving groove (41). One end of the steel ball spring (43) is fixed on the inner wall of the receiving groove (41), and the other end of the steel ball spring (43) is fixed on the steel ball spring (43).

3. The square tenon switching structure for a ratchet head according to claim 1, characterized in that: The limiting mechanism (5) includes a receiving groove (51) opened on the tenon (2) with pin, and a tenon positioning spring (52) set in the receiving groove (51). A tenon positioning spring (53) is provided between the tenon positioning spring (52) and the receiving groove (51). One end of the tenon positioning spring (53) is fixed on the inner wall of the receiving groove (51), and the other end of the tenon positioning spring (53) is fixed on the tenon positioning spring (52).

4. The square tenon switching structure for a ratchet head according to claim 1, characterized in that: The single-sided square hole positioning groove (6) includes a first groove (61) opened on the rotating spindle (3) and a second groove (62) opened on the first groove (61), and the adjacent sides of the two second grooves (62) are arranged in an arc shape.

5. The square tenon switching structure for a ratchet head according to claim 1, characterized in that: The two sets of fixing components (7) are respectively disposed at both ends of the ratchet body (1). The fixing component (7) includes a gasket (71) disposed between the ratchet body (1) and the rotating spindle (3). A retaining ring (72) is engaged between the gasket (71) and the rotating spindle (3).

6. The square tenon switching structure for a ratchet head according to claim 1, characterized in that: The pawl mechanism (8) includes a plurality of pawl bodies (81) arranged around the circumference of the rotating spindle (3). The middle part of the rotating spindle (3) is provided with a mounting groove (82) along the circumference. A retaining spring (83) is provided in the mounting groove (82), and the retaining spring (83) continuously applies elastic force to the pawl body (81).

7. The square tenon switching structure for a ratchet head according to claim 1, characterized in that: One of the single-sided square hole positioning grooves (6) has a positioning pin ejection hole (9) for use with a square tenon positioning spring pin (52).

8. The square tenon switching structure for a ratchet head according to claim 1, characterized in that: The inner wall of the rotating spindle (3) is provided with a plurality of recessed holes (10) for matching positioning steel balls.

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