Enhanced screwdriver head connecting mechanism and connecting rod

Abstract

The utility model relates to the technical field of screwdriver head connection, in particular to an enhanced screwdriver head connecting mechanism and a connecting rod, which comprises a connecting rod, a screwdriver head connecting hole matched with a screwdriver head is arranged at one end of the connecting rod; the locking assembly communicates with the interior of the screwdriver head connecting hole from the outer side of the connecting rod, and the part, located in the screwdriver head connecting hole, of the locking assembly can prevent the screwdriver head from being disengaged from the interior of the screwdriver head connecting hole; and the reinforcing ring is nested on the surfaces of the connecting rod and the locking assembly, which are close to one end of the bit connecting hole. According to the screwdriver head connecting mechanism, the connecting rod, the locking assembly and the reinforcing ring are matched with one another, the connecting position between the screwdriver head to be installed and the connecting rod can be protected in an enhanced mode through the reinforcing ring, and the problems that in the prior art, the installing and connecting position of the screwdriver head connecting mechanism and the screwdriver head is prone to breakage after long-time operation, and stable protection is lacked are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of screwdriver bit connection, in particular to an enhanced screwdriver bit connection mechanism and a connecting rod. Background Art

[0002] A screwdriver bit usually refers to a screwdriver head installed on a mechanical tool, electric drill or electric hammer to tighten or loosen screws. It can be driven manually or electrically to tighten or loosen screws. According to different head shapes, screwdriver bits can be divided into flat head, cross head, Pozi head, star head, square head, hexagonal head, Y-shaped head, etc. Among them, flat head and cross head are the most commonly used in life.

[0003] Generally, the screwdriver bits are detachably mounted on one end of the connecting mechanism to facilitate the replacement of different specifications. The screwdriver bits can also be connected to the connecting mechanism to lengthen the lever arm to adapt to different usage scenarios. The cross-section of the mounting end of the screwdriver bit is set to be non-circular, and a positioning groove is recessed inward on the side close to the mounting end, so that the connecting mechanism can position the screwdriver bit through the positioning groove to restrict its detachment, and drive the screwdriver bit to rotate together through the non-circular mounting end. However, the existing screwdriver bit connecting mechanism and the mounting connection of the screwdriver bit are prone to wear and tear. In particular, the existing screwdriver bit connecting mechanism generally achieves locking through the cooperation of steel balls and limit rings. However, after long-term operation, the abutment between the limit ring and the steel ball is prone to fracture due to stress, and lacks stable protection. Utility Model Content

[0004] Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the problems in the prior art that the screwdriver bit connection mechanism and the screwdriver bit installation connection are prone to breakage during long-term operation and lack stable protection, the present utility model is proposed.

[0006] Therefore, the utility model aims to provide an enhanced screwdriver bit connection mechanism.

[0007] In order to solve the technical problem, the utility model provides the following technical solution: an enhanced screwdriver bit connection mechanism, comprising:

[0008] A connecting rod, one end of which is provided with a bit connecting hole adapted to the bit;

[0009] A locking assembly, wherein the locking assembly is connected from the outside of the connecting rod to the inside of the bit connection hole, and the portion of the locking assembly located in the bit connection hole can prevent the bit from being detached from the bit connection hole; and

[0010] A reinforcement ring is nested in the surface of the connecting rod and the locking assembly near one end of the bit connecting hole.

[0011] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, the locking assembly includes a through groove provided on the surface of the connecting rod and connected to the screwdriver bit connection hole, a locking steel ball embedded in the through groove and capable of preventing the screwdriver bit from being separated from the screwdriver bit connection hole, and a limiting ring provided on the surface of the connecting rod and adapted to the locking steel ball;

[0012] The maximum distance L1 between the inner wall of the limiting ring and the outer wall of the through groove is not greater than the diameter D1 of the locking steel ball.

[0013] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, the limiting ring is made of aluminum or aluminum alloy, and the reinforcing ring is made of one or more of stainless steel, titanium alloy and tungsten alloy.

[0014] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, wherein: the opening size of the through groove gradually decreases from the surface of the connecting rod to the screwdriver bit connection hole;

[0015] The maximum opening size D2 of the through slot is larger than the diameter size D1 of the locking steel ball, and the minimum opening size D3 of the through slot is smaller than the diameter size D1 of the locking steel ball.

[0016] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, wherein: the length dimension L2 of the through groove in the insertion and extraction direction of the screwdriver bit connection hole is greater than the diameter dimension D1 of the locking steel ball;

[0017] A limiting groove adapted to the locking steel ball is formed on one side of the limiting ring close to the through groove, and the maximum cross-sectional dimension D4 of the limiting groove is smaller than the diameter dimension D1 of the locking steel ball.

[0018] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, wherein: a side of the connecting rod close to the screwdriver bit connection hole is recessed from outside to inside to form a groove, and a first clamping spring and a second clamping spring are respectively embedded at both ends of the groove;

[0019] A conical portion is formed by inward drawing of a side of the limiting ring close to the groove, and the limiting groove is arranged on the conical portion.

[0020] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, the draft angle of the conical portion satisfies that the distance dimension L3 from any position of the limiting groove to the center of the locking steel ball is smaller than the radius dimension of the locking steel ball.

[0021] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, the inner wall of the reinforcement ring is inwardly drawn to form a conical groove adapted to the outer wall of the conical portion, and the minimum cross-sectional dimension L4 of the conical groove is not greater than the cross-sectional dimension L5 of the first retaining ring;

[0022] The minimum cross-sectional dimension L6 of the conical portion is not greater than the cross-sectional dimension L7 of the second retaining ring.

[0023] As a preferred solution of the enhanced screwdriver bit connection mechanism of the utility model, an elastic element is arranged between the limit ring and the first retaining spring, and the elastic element is in a compressed state when there is no external force.

[0024] The enhanced screwdriver bit connection mechanism of the utility model has beneficial effects: the utility model cooperates with each other through the provided connecting rod, locking assembly and reinforcement ring, and can strengthen the protection of the abutment position of the limit ring and the locking steel ball through the reinforcement ring, thereby solving the problem in the prior art that the screwdriver bit connection mechanism and the installation connection of the screwdriver bit are prone to breakage during long-term operation and lack of stable protection.

[0025] The utility model also provides a screwdriver bit: it includes the above-mentioned enhanced screwdriver bit connecting mechanism and has all the beneficial effects of the enhanced screwdriver bit connecting mechanism, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the enhanced screwdriver bit connection mechanism of the utility model.

[0028] Figure 2 It is a schematic diagram of the axial cross-sectional structure of the enhanced screwdriver bit connection mechanism of the utility model.

[0029] Figure 3 For this utility model Figure 2 An enlarged schematic diagram of the structure at point A is shown.

[0030] Figure 4 It is a schematic structural diagram of a radial section of the enhanced screwdriver bit connection mechanism of the utility model.

[0031] Figure 5 It is a schematic diagram of the axial cross-sectional structure of the enhanced screwdriver bit connection mechanism of the utility model after installation and connection.

[0032] Figure 6It is a schematic diagram of the local structure of the groove of the enhanced screwdriver bit connection mechanism of the utility model.

[0033] In the figure: 100, connecting rod; 101, screwdriver bit connecting hole; 102, groove; 102a, retaining spring 1; 102b, retaining spring 2; 103, connecting head; 200, locking assembly; 201, through groove; 202, locking steel ball; 203, limiting ring; 203a, limiting groove; 203b, conical part; 203d, elastic element; 300, reinforcing ring; 301, conical groove. DETAILED DESCRIPTION

[0034] In order to make the objectives, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1

[0038] Reference Figure 1-Figure 3 , is the first embodiment of the utility model, which provides an enhanced screwdriver bit connection mechanism, which can achieve the effect of strengthening the protection of the screwdriver bit connection, and includes: a connecting rod 100, a locking assembly 200 and a reinforcing ring 300. The connecting rod 100 can be used for connecting and installing the screwdriver bit, the locking assembly 200 is used to connect and fix the screwdriver bit to the connecting rod 100, and the reinforcing ring 300 is used to enhance the protection of the connection between the screwdriver bit to be installed and the connecting rod 100.

[0039] Specifically, the connecting rod 100 has a screwdriver bit connecting hole 101 adapted to the screwdriver bit at one end thereof. The screwdriver bit connecting hole 101 may be of a universal shape and size so as to be adapted to screwdriver bits of various specifications.

[0040] Further, the locking assembly 200 is connected from the outside of the connecting rod 100 to the inside of the screwdriver bit connection hole 101, and the part of the locking assembly 200 located in the screwdriver bit connection hole 101 can prevent the screwdriver bit from being separated from the screwdriver bit connection hole 101. The locking assembly 200 is connected from the outside of the connecting rod 100 to the screwdriver bit connection hole 101, that is, the locking assembly 200 includes a part located on the outside of the connecting rod 100 and a part located on the inside of the connecting rod 100. Among them, the part of the locking assembly 200 located in the screwdriver bit connection hole 101 can be adapted to the positioning groove of the screwdriver bit, thereby preventing the screwdriver bit from being separated from the screwdriver bit connection hole 101; and the part located on the outside of the connecting rod 100 can facilitate the adjustment of the part located on the inside of the connecting rod 100. In this embodiment, the locking assembly 200 can adopt a common positioning pin, a spring positioning block, etc.

[0041] Among them, the reinforcing ring 300 is nested in the surface of the connecting rod 100 and the locking assembly 200 near one end of the screwdriver bit connecting hole 101. The reinforcing ring 300 nests and presses the connecting rod 100 and the locking assembly 200 located outside the connecting rod 100 to improve the integrity. On the one hand, it can reduce the vibration impact caused by the slot gap during operation, and on the other hand, when there is a bending force at the connection, it can disperse part of the energy to the reinforcing ring 300 to resist fracture.

[0042] In this embodiment, the end of the connecting rod 100 away from the screwdriver bit connecting hole 101 is provided with a connecting head 103 adapted to the screwdriver bit connecting hole 101 and the locking assembly 200. The connecting head 103 may have the same structure as the mounting end of a common screwdriver bit. The connecting head 103 is fixed to the connecting rod 100 by welding, so that multiple groups of connecting mechanisms are interconnected and lengthened to be applicable to more usage scenarios.

[0043] Working principle: When in use, the screwdriver bit to be installed or the connector 103 at the end of another set of connecting rods 100 is inserted from the installation end into the screwdriver bit connection hole 101, and then the positioning groove of the screwdriver bit or the connector 103 is limitedly connected through the locking assembly 200, and the reinforcing ring 300 is sleeved on the connection between the connecting rod 100 and the screwdriver bit or the connecting rod 100 and the connector 103 to play a protective role. When vibration occurs during work or bending force is generated at the connection, the reinforcing ring 300 can share part of the energy, thereby playing a protective role on the connection between the connecting rod 100 and the screwdriver bit or the connecting rod 100 and the connector 103.

[0044] Example 2

[0045] Reference Figure 2-Figure 4 , which is the second embodiment of the utility model. Different from the previous embodiment, this embodiment provides a through groove 201, a locking steel ball 202 and a limiting ring 203, so as to realize the rapid disassembly and connection between the connecting rod 100 and the screwdriver bit.

[0046] Specifically, the locking assembly 200 includes a through groove 201 opened on the surface of the connecting rod 100 and connected to the bit connecting hole 101, a locking steel ball 202 embedded in the through groove 201 and capable of preventing the bit from detaching from the bit connecting hole 101, and a limiting ring 203 arranged on the surface of the connecting rod 100 and adapted to the locking steel ball 202; the locking steel ball 202 is embedded in the through groove 201 and can extend into the bit connecting hole 101 through the through groove 201, and the diameter size D1 of the locking steel ball 202 is adapted to the size of the positioning groove of the bit or the connector 103 in Example 1, thereby blocking the bit or the above-mentioned connector 103 inserted into the bit connecting hole 101 to prevent the bit or the above-mentioned connector 103 from detaching from the bit connecting hole 101. The locking steel balls 202 and the through slots 201 may be provided in multiple groups. In this embodiment, the locking steel balls 202 and the through slots 201 are provided in three groups, and are distributed in a circular array relative to the center of the screwdriver bit connecting hole 101 .

[0047] The stop ring 203 is made of aluminum or aluminum alloy, and the reinforcement ring 300 is made of one or more of stainless steel, titanium alloy and tungsten alloy. The stop ring 203 is made of aluminum, which has the advantages of light weight, corrosion resistance and easy processing; while stainless steel, titanium alloy and tungsten alloy have more advantages in strength than aluminum. In this embodiment, the reinforcement ring 300 is made of stainless steel to enhance the protection of the connection between the connecting rod 100 and the stop ring 203, improve the strength and also have a certain corrosion resistance.

[0048] The maximum distance dimension L1 between the inner wall of the limiting ring 203 and the outer wall of the through slot 201 is not greater than the diameter dimension D1 of the locking steel ball 202. The side of the locking steel ball 202 close to the limiting ring 203 is blocked by the limiting ring 203. By setting the maximum distance dimension L1 between the inner wall of the limiting ring 203 and the outer wall of the through slot 201 to be not greater than the diameter dimension D1 of the locking steel ball 202, the locking steel ball 202 is prevented from detaching from the through slot 201, so as to ensure stable use.

[0049] Furthermore, the opening size of the through slot 201 gradually decreases from the surface of the connecting rod 100 to the inside of the screwdriver bit connecting hole 101; wherein, the maximum opening size D2 of the through slot 201 is larger than the diameter size D1 of the locking steel ball 202, and the minimum opening size D3 of the through slot 201 is smaller than the diameter size D1 of the locking steel ball 202. Through the size restriction, the locking steel ball 202 is limited and blocked by the through slot 201 on the side close to the screwdriver bit connecting hole 101, so that the locking steel ball 202 will not completely enter the screwdriver bit connecting hole 101, and the maximum opening size D2 of the through slot 201 on the surface of the connecting rod 100 is larger than the diameter size D1 of the locking steel ball 202, so that the locking steel ball 202 is conveniently installed directly from the maximum opening of the through slot 201 during assembly.

[0050] Among them, the length dimension L2 of the through groove 201 in the plug-in and pull-out direction of the bit connecting hole 101 is greater than the diameter dimension D1 of the locking steel ball 202; thereby, the locking steel ball 202 can move relative to the through groove 201 in the plug-in and pull-out direction of the bit connecting hole 101, and the different distances from the positioning groove to the end of different types of bit screws can be adaptively adjusted to adapt to more types of bit screws.

[0051] Preferably, a limiting groove 203a adapted to the locking steel ball 202 is provided on one side of the limiting ring 203 close to the through groove 201, and the maximum cross-sectional dimension D4 of the limiting groove 203a is smaller than the diameter dimension D1 of the locking steel ball 202. The position of the locking steel ball 202 can be limited by the limiting groove 203a on the limiting ring 203, so that the position of the screwdriver bit after installation is fixed; the maximum cross-sectional dimension D4 of the limiting groove 203a is smaller than the diameter dimension D1 of the locking steel ball 202, which can prevent the locking steel ball 202 from falling off.

[0052] The rest of the structure is the same as that of Example 1.

[0053] Working principle: when in use, the connecting head 103 at the end of the screwdriver bit or another group of connecting rods 100 to be installed is inserted into the screwdriver bit connecting hole 101 from the installation end. The movement of the installation end in the screwdriver bit connecting hole 101 will be blocked by the locking steel ball 202, and then a thrust toward the outside of the through groove 201 is applied to the locking steel ball 202. At the same time, the locking steel ball 202 can also slide in the through groove 201 relative to the plugging and unplugging direction of the screwdriver bit connecting hole 101. In this process, the locking steel ball 202 is also blocked and limited by the limiting ring 203 until the inner side of the locking steel ball 202 adaptively falls into the positioning groove on one side of the connecting head 103 of the screwdriver bit or another group of connecting rods 100 to be installed, and the outer side of the locking steel ball 202 is blocked by the limiting groove 203a, thereby fixing the position of the locking steel ball 202 and preventing the screwdriver bit or the connecting head 103 from detaching from the screwdriver bit connecting hole 101.

[0054] Example 3

[0055] Reference Figure 4-Figure 6 , which is the third embodiment of the utility model. Different from the previous embodiment, this embodiment provides a taper-formed conical portion 203b and a conical groove 301.

[0056] Specifically, the connecting rod 100 is concave from the outside to the inside on one side close to the screwdriver bit connecting hole 101 to form a groove 102, and the two ends of the groove 102 are respectively embedded with a first retaining ring 102a and a second retaining ring 102b; the limiting ring 203 is formed with a conical portion 203b by inward die drawing on one side close to the groove 102, and the limiting groove 203a is arranged on the conical portion 203b. The limiting groove 203a is arranged on the conical portion 203b with an inclined angle formed by die drawing, so that the distances between the locking steel ball 202 and different positions of the limiting groove 203a are different, so that when the locking steel ball 202 slides to different positions of the through groove 201, the degree of extrusion by the limiting groove 203a is also different.

[0057] Furthermore, the draft inclination angle of the conical portion 203b satisfies that the distance dimension L3 from any position of the limiting groove 203a to the center of the locking steel ball 202 is smaller than the radius dimension of the locking steel ball 202. The draft inclination angle of the conical portion 203b is limited so that when the conical portion 203b moves along the insertion and extraction direction of the screwdriver bit connection hole 101, the locking steel ball 202 can be pushed to slide on the through groove 201 through the limiting groove 203a.

[0058] The inner wall of the reinforcement ring 300 is formed by inward drawing to form a conical groove 301 adapted to the outer wall of the conical portion 203b, and the minimum cross-sectional dimension L4 of the conical groove 301 is not greater than the cross-sectional dimension L5 of the first retaining spring 102a; the minimum cross-sectional dimension L6 of the conical portion 203b is not greater than the cross-sectional dimension L7 of the second retaining spring 102b. In this embodiment, the first retaining spring 102a is arranged at one end of the groove 102 close to the opening direction of the screwdriver bit connection hole 101, and the minimum cross-sectional dimension L4 of the conical groove 301 is not greater than the cross-sectional dimension L5 of the first retaining spring 102a, thereby limiting the position of the reinforcement ring 300; the second retaining spring 102b is arranged at the other end of the groove 102, and the minimum cross-sectional dimension L6 of the conical portion 203b is not greater than the cross-sectional dimension L7 of the second retaining spring 102b, thereby limiting the position of the limit ring 203. The conical groove 301 on the inner wall of the reinforcing ring 300 is matched with the outer wall of the conical portion 203b of the limiting ring 203, that is, the draft angles of the two are the same, which is easy to assemble, and the reinforcing ring 300 can be closely fitted with the outer wall of the limiting ring 203, increasing the contact area and thus enhancing protection. The reinforcing ring 300 and the connecting rod 100 can be detachably connected by bolts. In this embodiment, the reinforcing ring 300 and the connecting rod 100 are fixed by welding.

[0059] Preferably, an elastic element 203d is provided between the limit ring 203 and the spring 102a, and the elastic element 203d is in a compressed state when no external force is applied. In this embodiment, the elastic element 203d adopts a common spring structure, is sleeved between the limit ring 203 and the spring 102a, and is in a compressed state in the initial state, thereby giving elastic force to the limit ring 203, so that the limit ring 203 presses the locking steel ball 202 into the through groove 201.

[0060] The rest of the structure is the same as that of Example 2.

[0061] Assembly process: first install the second retaining spring 102b to one end of the groove 102, then install the locking steel ball 202 into the through groove 201 from the outer opening of the through groove 201, and then put the limit ring 203 from one end of the non-conical part 203b into the groove 102, the second retaining spring 102b provides a limit block for the limit ring 203, and the inner wall of the limit ring 203 also limits the locking steel ball 202; then the spring of the elastic element 203d is sleeved on the groove 102, so that one end of the spring abuts against the limit ring 203, and the spring is squeezed in a hurry, and the retaining spring 102a is installed at the other end of the groove 102, so that the spring is compressed to push the limit ring 203 to the second retaining spring 102b, and finally the reinforcement ring 300 is sleeved on the end of the connecting rod 100, and the reinforcement ring 300 is fixed between the connecting rod 100 after the retaining spring 102a is tightened.

[0062] Usage process: When installing a screwdriver bit, by pushing the limit ring 203 to move, while further compressing the elastic element 203d, the gap between the limit ring 203 and the locking steel ball 202 increases. At this time, the installation end of the screwdriver bit is inserted into the screwdriver bit connecting hole 101. The screwdriver bit squeezes the curved surface of the locking steel ball 202 to squeeze the locking steel ball 202 toward the outside of the through groove 201 until the locking steel ball 202 fits into the positioning groove of the screwdriver bit. At this time, the limit ring 203 is released, and the elastic element 203d in the compressed state will push the limit ring 203 in the reverse direction until the limit ring 203 squeezes the locking steel ball 202, and the locking steel ball 202 falls into the through groove 201 and is fixed in position. At the same time, the locking steel ball 202 cooperates with the positioning groove of the screwdriver bit to prevent the screwdriver bit from detaching from the screwdriver bit connecting hole 101.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An enhanced screwdriver bit connection mechanism, characterized in that: include, A connecting rod (100), one end of the connecting rod (100) being provided with a bit connecting hole (101) adapted to a bit; A locking assembly (200), the locking assembly (200) being connected from the outside of the connecting rod (100) to the inside of the bit connecting hole (101), and the portion of the locking assembly (200) located inside the bit connecting hole (101) can prevent the bit from being detached from the bit connecting hole (101); as well as, A reinforcement ring (300) is nested in the connection rod (100) and the surface of the locking assembly (200) at one end close to the bit connection hole (101), and is used to drive the locking assembly (200) to lock onto the connected bit.

2. The enhanced screwdriver bit connection mechanism according to claim 1, characterized in that: The locking assembly (200) comprises a through groove (201) formed on the surface of the connecting rod (100) and connected to the screwdriver bit connecting hole (101), a locking steel ball (202) embedded in the through groove (201) and capable of preventing the screwdriver bit from being separated from the screwdriver bit connecting hole (101), and a limiting ring (203) formed on the surface of the connecting rod (100) and adapted to the locking steel ball (202); The maximum distance dimension (L1) between the inner wall of the limiting ring (203) and the outer wall of the through groove (201) is not greater than the diameter dimension (D1) of the locking steel ball (202).

3. The enhanced screwdriver bit connection mechanism according to claim 2, characterized in that: The limiting ring (203) is made of aluminum or an aluminum alloy material, and the reinforcing ring (300) is made of one or more of stainless steel, titanium alloy and tungsten alloy.

4. The enhanced screwdriver bit connection mechanism according to claim 2 or 3, characterized in that: The opening size of the through groove (201) gradually decreases from the surface of the connecting rod (100) toward the bit connecting hole (101); The maximum opening size (D2) of the through slot (201) is larger than the diameter size (D1) of the locking steel ball (202), and the minimum opening size (D3) of the through slot (201) is smaller than the diameter size (D1) of the locking steel ball (202).

5. The enhanced screwdriver bit connection mechanism according to claim 4, characterized in that: The length dimension (L2) of the through groove (201) in the plugging and unplugging direction of the bit connection hole (101) is greater than the diameter dimension (D1) of the locking steel ball (202); A limiting groove (203a) adapted to the locking steel ball (202) is provided on one side of the limiting ring (203) close to the through groove (201), and the maximum cross-sectional dimension (D4) of the limiting groove (203a) is smaller than the diameter dimension (D1) of the locking steel ball (202).

6. The enhanced screwdriver bit connection mechanism according to claim 5, characterized in that: A side of the connecting rod (100) close to the screwdriver bit connecting hole (101) is recessed from outside to inside to form a groove (102), and a first clamping spring (102a) and a second clamping spring (102b) are respectively embedded at two ends of the groove (102); A conical portion (203b) is formed by inward drawing of a side of the limiting ring (203) close to the groove (102), and the limiting groove (203a) is arranged on the conical portion (203b).

7. The enhanced screwdriver bit connection mechanism according to claim 6, characterized in that: The draft inclination angle of the conical portion (203b) satisfies that the distance dimension (L3) from any position of the limiting groove (203a) to the center of the locking steel ball (202) is smaller than the radius dimension of the locking steel ball (202).

8. The enhanced bit connection mechanism according to claim 7, characterized in that: The inner wall of the reinforcement ring (300) is drawn inward to form a conical groove (301) adapted to the outer wall of the conical portion (203b), and the minimum cross-sectional dimension (L4) of the conical groove (301) is not greater than the cross-sectional dimension (L5) of the first retaining ring (102a); The minimum cross-sectional dimension (L6) of the conical portion (203b) is not greater than the cross-sectional dimension (L7) of the second retaining ring (102b).

9. The enhanced bit connection mechanism according to claim 8, characterized in that: An elastic element (203d) is provided between the limiting ring (203) and the first clamping spring (102a), and the elastic element (203d) is in a compressed state when no external force is applied.

10. A connecting rod, characterized in that: It comprises the enhanced bit connection mechanism as described in any one of claims 1-9.

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