Novel screwdriver

Abstract

The utility model relates to the field of manual tools, in particular to a novel screwdriver which comprises a quick-change screwdriver head, a ratchet wheel, a connecting rod, a reversing locking pin and a cylindrical body. The ratchet wheel is rotatably installed at the front end of the cylindrical body through the connecting rod, a plurality of radial grooves are evenly distributed in the end face, facing the cylindrical body, of the ratchet wheel in the circumferential direction, the reversing locking pin is rotatably arranged in the installation hole, and the contact angle between the arc guide face and the side walls of the radial grooves can be changed by rotating the shifting rod. And the quick-change screwdriver head is detachably mounted at the front end of the connecting rod. The quick-change screwdriver is ingenious in structure and easy and convenient to use, the quick-change screwdriver blade can be replaced to adapt to assembly and disassembly of screws of different specifications, the screwing or disassembly torque can be quickly assisted and increased through rotation of the handle, the position of the reversing locking pin is changed by shifting the shifting rod, clockwise locking and anticlockwise passing of the screwdriver can be achieved, and the screwdriver is convenient to use. The functions of clockwise passing, anticlockwise locking and bidirectional locking are achieved, and operation of a user is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of hand tools, specifically to a novel screwdriver. Background Technology

[0002] Traditional ratchet screwdrivers, as common hand tools, rely on a one-way locking mechanism to achieve continuous rotation. Existing technologies typically employ a reversing method where spring-loaded steel balls engage with toothed teeth, controlling the rotation direction by switching the contact positions of the steel balls with different tooth surfaces. However, this structure has significant drawbacks: firstly, the line contact between the steel balls and the toothed teeth easily leads to localized stress concentration, causing wear and even failure after prolonged use; secondly, reversing requires an independent lever or complex linkage mechanism, resulting in a bulky tool head that is difficult to operate in confined spaces; and thirdly, traditional screwdriver heads are fixed using magnetic or slotted methods, leading to low replacement efficiency and poor connection stability, especially prone to slippage under high torque conditions.

[0003] Furthermore, existing tools often employ rigid fixing methods in their shaft connection designs, resulting in high overall replacement costs after the rotating parts wear out. These technical shortcomings severely restrict the operating efficiency and service life of ratchet tools, especially in specialized fields such as aerospace precision assembly and automotive repair, where there is an urgent need for an innovative solution that combines high reliability, compact structure, and user-friendly operation. Therefore, current tool designs pursue better convenience and greater versatility, enabling a single tool to meet the needs of more working conditions, thus facilitating operator use and portability. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of screwdriver, which aims to overcome the defects of the prior art and solve problems such as easy wear or even failure and the inability to replace the screwdriver head.

[0005] Therefore, this utility model proposes a novel screwdriver, comprising: a quick-change screwdriver head, a ratchet, a connecting rod, a reversing lock pin, and a cylindrical body; the ratchet is rotatably mounted on the front end of the cylindrical body via the connecting rod, and the connecting rod passes through the central axis of the ratchet and the cylindrical body;

[0006] The end face of the ratchet facing the cylindrical body has multiple radial grooves evenly distributed circumferentially, and the cylindrical body has mounting holes at the positions corresponding to the radial grooves.

[0007] The reversing lock stop pin is rotatably disposed in the mounting hole, with an arc guide surface at its front end that mates with the radial groove, and its rear end abutting against the bottom of the mounting hole via a return spring;

[0008] A radially extending lever is fixed to the side of the reversing lock pin. The contact angle between the arc guide surface and the radial groove sidewall can be changed by rotating the lever.

[0009] When the arc guide surface makes contact with the first sidewall of the radial groove, the ratchet is blocked from rotating clockwise; when it makes contact with the second sidewall, it is blocked from rotating counterclockwise; when it is in the neutral position, it is blocked from rotating in both directions; and the quick-change screwdriver head is detachably mounted on the front end of the connecting rod.

[0010] As a preferred technical solution of this application, the ratchet and the cylindrical body are respectively provided with a central hole at their center positions, and the connecting rod is inserted into the central hole of the ratchet and the cylindrical body.

[0011] As a preferred technical solution of this application, the tail of the connecting rod is provided with an annular groove, and a limiting screw is installed on the side wall of the cylindrical body, with the top step of the limiting screw inserted into the annular groove.

[0012] As a preferred technical solution of this application, the end of the limiting screw maintains an axial gap of 0.1-0.3mm with the bottom of the groove at the tail of the connecting rod, so that the connecting rod and the cylindrical body can rotate relative to each other.

[0013] As a preferred technical solution of this application, the connecting rod and the ratchet are circumferentially fixed by a cylindrical pin with a transition fit, and the axis of the cylindrical pin is orthogonal to the axis of the connecting rod.

[0014] As a preferred technical solution of this application, the tail end of the reversing lock stop pin is provided with a cylindrical step, and the cylindrical step cooperates with the reset spring.

[0015] As a preferred embodiment of this application, the radial grooves are 6 in number, and their width is 0.1-0.5 mm larger than the width of the reversing lock valve.

[0016] As a preferred technical solution of this application, the quick-change screwdriver bit is detachably connected to the irregularly shaped groove at the front end of the connecting rod by the irregularly shaped protrusion at its tail end.

[0017] As a preferred technical solution of this application, the cylindrical body has a handle installed at its tail end via a rotating pin.

[0018] As a preferred technical solution of this application, the front end of the handle is an arc-shaped groove, and the cylindrical body also has a corresponding arc-shaped groove.

[0019] This utility model provides a novel screwdriver with wider versatility through the replacement of the screwdriver head. The design of the reversible locking pin and radial groove allows the screwdriver to be locked in one direction while passing through in the other, or to be locked in both directions. The rotating handle design can accommodate use in more space-constrained situations, and can also provide quick assistance to easily increase the tightening torque or loosening torque of screws.

[0020] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the novel screwdriver of this utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the novel screwdriver of this utility model. Figure 2 ;

[0024] Figure 3 This is a side view of the ratchet in the novel screwdriver of this utility model;

[0025] Figure 4 This is a schematic diagram of the cylindrical main body of the novel screwdriver of this utility model;

[0026] Figure 5 This is a schematic diagram of the quick-change screwdriver tip in the novel screwdriver of this utility model;

[0027] Figure 6 This is a schematic diagram of the connecting rod in the novel screwdriver of this utility model;

[0028] Figure 7 This is a schematic diagram showing the rotation of the cylindrical body in three states of the reversing lock pin in the new screwdriver of this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. Quick-change screwdriver bit; 2. Ratchet; 3. Cylindrical pin; 4. Connecting rod; 5. Reversing lock pin; 6. Lever; 7. Limit screw; 8. Cylindrical body; 9. Rotating pin; 10. Handle; 11. Return spring; 21. Radial groove; 41. Annular groove; 42. Irregular groove; 15. Irregular protrusion; 81. Center hole; 82. Mounting hole. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figures 1-7 As shown, the novel screwdriver of this utility model includes: a quick-change screwdriver head 1, a ratchet 2, a cylindrical pin 3, a connecting rod 4, a reversing lock pin 5, a lever 6, a limit screw 7, a return spring 11, a rotating pin 9, a handle 10, and a cylindrical body 8.

[0032] The ratchet 2 is rotatably mounted on the front end of the cylindrical body 8 via a connecting rod 4, which passes through the central axis of the ratchet 2 and the cylindrical body 8. Multiple radial grooves 21 are evenly distributed circumferentially on the end face of the ratchet 2 facing the cylindrical body 8. The cylindrical body 8 has mounting holes 82 corresponding to the radial grooves 21. A reversing lock pin 5 is rotatably mounted in the mounting hole 82, with an arc-shaped guide surface at its front end that mates with the radial grooves 21, and its rear end abutting against the bottom of the mounting hole 82 via a return spring 11. A radially extending lever 6 is fixed to the side of the reversing lock pin 5. Rotating the lever 6 changes the contact angle between the arc-shaped guide surface and the sidewall of the radial groove 21. When the arc-shaped guide surface forms a surface contact with the first sidewall of the radial groove 21, clockwise rotation of the ratchet 2 is blocked. When it forms a surface contact with the second sidewall, counterclockwise rotation is blocked. When in a neutral position, bidirectional rotation is blocked. The quick-change screwdriver head 1 is detachably mounted on the front end of the connecting rod 4.

[0033] Specifically, a central hole 81 is provided at the center of both the ratchet 2 and the cylindrical body 8, and the connecting rod 4 is inserted into the central hole 81 of both the ratchet 2 and the cylindrical body 8. The connecting rod 4 is connected and fixed to the ratchet 2 by a transition-fitting cylindrical pin 3. The axis of the cylindrical pin 3 is orthogonal to the axis of the connecting rod 4.

[0034] The cylindrical pin 3 has a transition fit with the ratchet 2 and the connecting rod 4. The annular groove 41 at the tail of the connecting rod 4 has a certain width and depth to ensure that after the limit screw 7 is installed, its end is placed into the groove at the tail of the connecting rod 4, and a gap of 0.1-0.3mm is maintained between the end of the limit screw 7 and the bottom of the annular groove 41 at the tail of the connecting rod 4. The tip size and total length of the limit screw 7 are designed according to the annular groove at the tail of the connecting rod 4. After the limit screw 7 is tightened, its tip must be submerged in the groove, and a gap must be left between it and the bottom and wall of the groove, so that the ratchet 2 and the screwdriver cylindrical body 8 can easily rotate relative to each other without the restriction of the reversing locking pin 5.

[0035] The cylindrical body 8 has a mounting hole 82 on its end face. A return spring 11 is placed in the mounting hole 82, and the reversing lock pin 5 is also placed in the mounting hole 82, compressing the return spring 11. The reversing lock pin 5 has a mounting hole on one side. The lever 6 is assembled with the mounting hole of the reversing lock pin 5 through a slot on the side of the cylindrical body 8. Moving the lever 6 can drive the reversing lock pin to rotate and change direction. The return spring 11 has sufficient rigidity to push the front end of the reversing lock pin 5 into the groove on the end face of the ratchet 2, without hindering the manual retraction of the reversing lock pin 5. Among them, one end of the ratchet 2 has 6-8 radial grooves 21 distributed circumferentially. The width and depth of the radial grooves 21 are determined by the reversing lock pin 5. The width of the radial grooves 21 is 0.1-0.5mm larger than the width of the reversing lock pin 5.

[0036] The quick-change screwdriver bit 1 is connected to the connecting rod 4, allowing for the replacement of different types as needed. The quick-change screwdriver bit 1 has a specific shaped protrusion 15 at its tail end, and the connecting rod 4 has a shaped groove 42. The shaped protrusion 15 and the groove 42 mate, forming a detachable connection between the quick-change screwdriver bit 1 and the connecting rod 4, enabling rapid positioning and replacement of the screwdriver bit. The screwdriver bit selected depends on the screws being installed or removed and is not limited to the types shown in the illustration.

[0037] The cylindrical body 8 has a through hole at its rear end. The handle 10 is connected to the cylindrical body 8 via a rotating pin 9, allowing the handle 10 to rotate freely within a certain angle. The front end of the handle 10 has an arc-shaped design, and the cylindrical body 8 also has a corresponding arc-shaped groove. The handle 10 can rotate -90° to 90° along the rotating pin 9. The handle 10 can rotate at a certain angle along the rotating pin 9, which is convenient for use in certain space-constrained situations. At the same time, the handle 10 can increase the lever arm, providing greater torque for tightening / untilting screws and bolts.

[0038] This utility model features a clever structure and is easy and convenient to use. The quick-change screwdriver bit 1 allows for the assembly and disassembly of screws and bolts of different sizes. Rotating the handle 10 provides quick and easy assistance, increasing the tightening or loosening torque for easy assembly or disassembly of screws and bolts. By moving the lever 6 to change the position of the reversing locking pin, the screwdriver can be locked clockwise, passed counterclockwise, passed clockwise and locked counterclockwise, or locked in both directions, facilitating user operation.

[0039] The reversing lock stop pin 5 has a cylindrical step at its tail end, which is used to install the return spring 11. The return spring 11 is installed between the hole reserved in the cylindrical body 8 and the reversing lock stop pin 5. The return spring 11 has sufficient rigidity to push the front end of the reversing lock stop pin 5 into the groove on the end face of the ratchet 2, and does not hinder the manual reversing lock stop pin 5 from being moved back.

[0040] The working principle and process of the novel screwdriver of this utility model are briefly described below.

[0041] When using it, select the appropriate quick-change screwdriver bit 1 according to the type of screw, and insert the protrusion at the end of the quick-change screwdriver bit 1 into the mating groove of the connecting rod 4.

[0042] like Figure 7 As shown, according to the usage requirements, the lever 6 is moved to position the reversing lock pin 5 in the corresponding position. [When the lever 6 extends radially outward, the screwdriver is locked in both clockwise and counterclockwise directions; when the lever 6 is moved counterclockwise, the screwdriver is locked in a clockwise direction, and passes through when rotated counterclockwise; when the lever 6 is moved clockwise, the screwdriver is locked in a counterclockwise direction, and passes through when rotated clockwise]. To adjust the reversing lock pin 5, the lever 6 needs to be moved towards the cylindrical body 8 to disengage the reversing lock pin 5 from the corresponding groove of the ratchet 2. Move the lever 6 to rotate the reversing lock pin 5 to the desired working position, release the lever 6, and the reversing lock pin 5 will re-insert into a radial groove 21 of the ratchet 2 under the elastic force of the return spring 11.

[0043] When the screwdriver needs assistance or is in a specific space constraint, the handle 10 is turned so that it rotates along the rotating pin 9 at a certain angle to obtain a larger lever arm or to avoid specific space constraints.

[0044] This utility model features a clever structure and is easy and convenient to use. The quick-change screwdriver bit 1 allows for the assembly and disassembly of screws (screws) of different sizes. Rotation of the handle 10 provides quick and easy assistance, increasing the tightening or loosening torque for easy assembly or disassembly of screws (screws). By changing the position of the reversing locking pin by moving the lever 6, the screwdriver can be locked clockwise, passed counterclockwise, passed clockwise and locked counterclockwise, or locked in both directions, facilitating user operation.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A new type of screwdriver characterized in that, The utility model relates to a quick-change screwdriver head (1), a ratchet wheel (2), a connecting rod (4), a reversing locking pin (5) and a cylindrical body (8), the ratchet wheel (2) is rotatably installed at the front end of the cylindrical body (8) through the connecting rod (4), and the connecting rod (4) penetrates the central axis of the ratchet wheel (2) and the cylindrical body (8); A plurality of radial grooves (21) are uniformly distributed in the circumferential direction on the end face of the cylindrical body (8), and the cylindrical body (8) is provided with a mounting hole (82) corresponding to the position of the radial groove (21); The reversing locking pin (5) is rotatably arranged in the mounting hole (82), and the front end of the reversing locking pin (5) is provided with a circular arc guide surface matched with the radial groove (21), and the tail end of the reversing locking pin (5) abuts against the bottom of the mounting hole (82) through a reset spring (11); The side of the reversing locking pin (5) is fixed with a radially extending lever (6), and the contact angle of the circular arc guide surface and the side wall of the radial groove (21) can be changed by rotating the lever (6); When the circular arc guide surface forms surface contact with the first side wall of the radial groove (21), the clockwise rotation of the ratchet wheel (2) is blocked; when the circular arc guide surface forms surface contact with the second side wall, the counterclockwise rotation of the ratchet wheel (2) is blocked; when the circular arc guide surface is in the neutral position, the clockwise and counterclockwise rotation of the ratchet wheel (2) is blocked; and the quick-change screwdriver head (1) is detachably mounted at the front end of the connecting rod (4). The center holes (81) are arranged at the central positions of the ratchet wheel (2) and the cylindrical body (8) respectively, and the connecting rod (4) penetrates the center holes (81) of the ratchet wheel (2) and the cylindrical body (8).

2. The new screwdriver according to claim 1, characterized in that, The tail part of the connecting rod (4) is provided with an annular groove (41), the side wall of the cylindrical body (8) is provided with a limiting screw (7), and the top step of the limiting screw (7) is arranged in the annular groove (41).

3. The new screwdriver according to claim 2, characterized in that, The end of the limiting screw (7) and the groove bottom of the tail part of the connecting rod (4) have an axial gap of 0.1-0.3mm, so that the connecting rod (4) and the cylindrical body (8) can rotate relatively.

4. The new screwdriver according to claim 3, characterized in that, The connecting rod (4) and the ratchet wheel (2) are circumferentially fixed through a transition-fitted cylindrical pin (3), and the axis of the cylindrical pin (3) is arranged orthogonally to the axis of the connecting rod (4).

5. The new screwdriver according to claim 2, characterized in that, The tail end of the reversing locking pin (5) is provided with a cylindrical step, and the cylindrical step is matched with the reset spring (11).

6. The new screwdriver according to claim 1, characterized in that, The number of the radial grooves (21) is six, and the groove width is larger than the width of the reversing locking pin (5) by 0.1-0.5mm.

7. The new screwdriver according to claim 1, characterized in that, The quick-change screwdriver head (1) is detachably connected with the front end of the connecting rod (4) through the special-shaped protrusion (15) at the tail end of the quick-change screwdriver head (1) and the special-shaped groove (42) at the front end of the connecting rod (4).

8. The new screwdriver according to claim 1, characterized in that, The tail part of the cylindrical body (8) is provided with a handle (10) through a rotating pin (9).

9. The new screwdriver according to claim 1, characterized in that, The front end of the handle (10) is an arc-shaped groove, and the cylindrical body (8) also has a corresponding arc-shaped groove.

10. The new screwdriver according to claim 9, characterized in that, ​

Images