A reamer tap handle

Abstract

The present invention discloses a technology related to tool holders, specifically a reamer and tap tool holder, which includes a tool holder, steel balls, a clutch member, steel ball a, a transmission member, steel ball b, a floating member, steel ball c, a positioning member, steel ball d, a chuck, a spring, spring a, spring b, screws, a vertical member, and a rolling ring. The positioning step on the upper end face of the positioning member is connected to the positioning step on the inner circular plane of the tool holder through an O-ring. The lower end step face of the positioning member has a first planar groove. The inner circle of the first planar groove is a groove for placing O-ring a, and the outer circle of the first planar groove is a groove for placing O-ring b. The tool holder of the present invention enables reamers and taps to be shared, thereby reducing the purchase cost. More importantly, it avoids the respective disadvantages of ordinary reamer tool holders and ordinary tapping tool holders; it combines the respective functional advantages of them, enabling carbide reamers and carbide taps to be widely popularized and applied in the market, greatly reducing the original cost of using carbide reamers and taps.

Description

Technical Field

[0001] The invention relates to the technical field of tool handles, in particular to a reamer tapping tool handle. Background Art

[0002] Tungsten steel reamers and tungsten steel taps are the inevitable trend of the development of machining tools. When processing threads of hard materials, taps do not need to be replaced frequently because of their durability, and they can guarantee the precision requirements that other alloy taps cannot achieve; when reaming holes in large quantities, the high precision and consistency of each hole are the primary conditions for hole processing. Tungsten steel reamers or taps are more durable and wear-resistant than other alloy reamers or taps, which not only guarantees precision but also improves production efficiency. However, tungsten steel reamers and taps also have the disadvantages of poor toughness, high brittleness, poor bending resistance and impact resistance, and the cutting edge is easy to break, resulting in too low usage rate in the current market.

[0003] Patent CN106964851B is a structure that relies on grooves and steel balls for centering. There are certain difficulties in processing and measuring the center-positioned grooves, so the concentricity is difficult to control. The eccentricity makes it difficult for the tap to enter the hole, and it also causes the tap to cut with a single blade, which makes the tap easy to break. The center-positioned groove and steel ball structure will produce repeated violent impacts up and down and left and right when floating, causing the cutting edge of the tungsten steel tap to break quickly. The verticality of the tap and the handle is determined by the size of the contact pressure of the floating part on the handle. While ensuring the verticality of the tap and the handle, it also increases the floating resistance of the tap. The more positive the verticality, the greater the axial pressure, resulting in greater floating resistance. The eccentricity affects both the accuracy of the thread and the service life of the cutting edge of the tungsten steel tap. Since the floating part and the steel ball have no centering setting, the tap and the handle are not concentric when the load rotates, which makes it difficult for the tap to enter the hole. At the same time, the floating resistance during floating is increased due to the non-concentricity, which aggravates the cracking of the tap cutting edge.

[0004] Patent CN217316208U is a common reamer handle that cannot protect the reamer by axial floating of the reamer. When the bottom hole drill is eccentric, or the set depth is deeper than the actual depth of the bottom hole, or when the waste chips are blocked, the reamer cannot avoid the axial pressure of the handle on the reamer's advancement, resulting in the reamer being pressed and broken, and the production safety of the reamer cannot be guaranteed, especially the tungsten steel reamer will break under the strong pressure of the handle.

[0005] Therefore, a reamer tapping handle is invented. Summary of the invention

[0006] In view of the above problems and / or the problems existing in the existing reamer tapping handle, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide a reamer tapping handle that can solve the above-mentioned existing problems.

[0008] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0009] A reamer tap handle, which includes a handle, steel balls, a clutch member, steel ball a, a transmission member, steel ball b, a floating member, steel ball c, a positioning member, steel ball d, a chuck, a spring, spring a, spring b, a screw, a vertical member and a rolling ring. The positioning step on the upper end face of the positioning member is connected to the positioning step on the inner circular plane of the handle through an O-ring.

[0010] The lower end step surface of the positioning member has a first flat groove. The inner circle of the first flat groove is a groove for placing O-ring a, and the outer circle of the first flat groove is a groove for placing O-ring b.

[0011] The upper end face of the transmission member has a second flat groove. The inner circle of the second flat groove is a groove for placing O-ring d, and the outer circle of the second flat groove is a groove for placing O-ring c.

[0012] As a preferred solution of a reamer tap handle according to the present invention, wherein: the outer circle at the lower end of the positioning member is movably connected to the inner circle of the vertical member. The outer circle at the upper end of the positioning member has a hole for placing a constant force device, and there is a groove for placing a constant force spring in the hole. The center of the positioning member has a hole for placing spring b. The upper end face of the positioning member has a cage b, and there is spring a on the outer circle at the lower end of the positioning member.

[0013] As a preferred solution of a reamer tap handle according to the present invention, wherein: the lower end face of the handle has a positioning socket. The screw is provided with a positioning post, and the positioning post is composed of a spring and an inclined post.

[0014] As a preferred solution of a reamer tap handle according to the present invention, wherein: the inner circle step surface of the screw is connected to the vertical member through a cage. The inner circle of the vertical member is movably connected to the outer circle at the lower end of the positioning member. The outer circle at the lower end of the vertical member is connected to the screw through O-ring e.

[0015] As a preferred solution of a reamer tap handle according to the present invention, wherein: the handle can drive the chuck to rotate through steel balls, a clutch member, steel ball a, a transmission member, steel ball b, a floating member, steel ball c, a positioning member, and steel ball d. The inner circle of the positioning member is connected to the chuck through steel ball d, and the chuck makes axial movement up and down in the hole of the positioning member by the rolling of steel ball d. The outer circle of the chuck has a rolling groove for placing steel ball d, and the middle hole is for installing spring b. The upper end of spring b is connected to the central hole of the inner circle of the handle.

[0016] As a preferred embodiment of the reamer tap handle of the present invention, the inner circle of the handle and the outer circle of the clutch member are both provided with ball grooves for placing steel balls, and the handle and the clutch member are connected by steel balls. The upper end surface of the clutch member has an inclined groove for placing ball a.

[0017] As a preferred embodiment of the reamer tap handle of the present invention, the lower end of the outer circle of the transmission member has a groove for placing ball a. The stepped surface of the transmission member has a cage a and is connected to the rolling ring. There are two wire withdrawal anti-slip holes on the plane of the transmission member, and there are two anti-slip columns in the wire withdrawal anti-slip holes. A floating member and ball b are provided in the plane groove at the upper end surface of the transmission member. O-ring a and O-ring b are respectively arranged on the inner and outer circles in the second plane groove of the transmission member.

[0018] As a preferred embodiment of the reamer tap handle of the present invention, the floating member is an ordinary cross coupling, and the upper and lower steps are in the X and Y directions. The upper step of the floating member and ball c are in the first plane groove at the lower stepped surface of the positioning member.

[0019] As a preferred embodiment of the reamer tap handle of the present invention, a spring is provided between the handle and the chuck.

[0020] Compared with the prior art:

[0021] 1. This combined handle enables the reamer and the tap to be shared, thereby reducing the purchase cost. More importantly, it avoids the respective disadvantages of ordinary reamer handles and ordinary tapping handles; it combines the respective functional advantages of them, enabling tungsten carbide reamers and tungsten carbide taps to be widely popularized and applied in the market, and greatly reducing the original cost of using tungsten carbide reamers and taps.

[0022] 2. By adjusting the screw, not only the torque safety of the tungsten carbide reamer and the tungsten carbide tap is protected, but also the perpendicularity and concentricity between the tungsten carbide reamer and the tungsten carbide tap and the handle are adjusted. This design simplifies the internal structure of the handle.

[0023] 3. The advantages of using O-rings to center in the field of combined handles are as follows:

[0024] 3.1. Machining the stepped groove of the O-ring is simple and convenient;

[0025] 3.2. Before the tungsten carbide reamer and the tap enter the hole, because they are directly centered with the handle through the O-ring, the tungsten carbide reamer and the tap can maintain axial height concentricity with the bottom hole, so the entry into the hole is smooth and safe. Since the cutting edges are evenly stressed and there is no single-edge cutting resulting in chipping, the cutting edges of the tungsten carbide reamer and the tap are evenly stressed and not prone to cracking. At the same time, high precision and surface finish of reaming or tapping can be guaranteed;

[0026] 3.3. The O-ring is used for both centering and floating in the combined tool shank. Since the O-ring is a flexible body, it does not affect the free floating during the machining of steel parts.

[0027] 3.4. Prevent the leakage of the central coolant.

[0028] 3.5. The O-ring directly and indirectly positions and floats the floating parts, steel balls and chucks, so that the floating parts, steel balls and chucks are concentric with the tool shank. Only in this way can the reamer or tap enter the hole smoothly and safely. During machining, the cutting edges are evenly stressed, preventing single-edge cutting from causing chipping or fracture; at the same time, the resistance to floating of the reamer or tap under load is reduced.

[0029] 4. In this combined tool shank, when the bottom hole is drilled eccentrically, or the set depth is deeper than the actual depth of the bottom hole, or the waste chips are blocked, the chuck can break through the limiting pressure of the constant force spring and make axial floating in the positioning part to ensure the safe production of the tungsten carbide reamer. Description of the Drawings

[0030] Figure 1 It is the overall structure diagram of the reamer and tap combined tool shank of the present invention;

[0031] Figure 2 It is the part drawing of the tool shank of the present invention;

[0032] Figure 3 It is the part drawing of the clutch part of the present invention;

[0033] Figure 4 It is the part drawing of the floating part of the present invention;

[0034] Figure 5 It is the part drawing of the transmission part of the present invention;

[0035] Figure 6 It is the part drawing of the positioning part of the present invention;

[0036] Figure 7 It is the part drawing of the chuck of the present invention;

[0037] Figure 8 It is the part drawing of the screw of the present invention;

[0038] Figure 9 It is the part drawing of the vertical part of the present invention;

[0039] Figure 10 It is the part drawing of the cage of the present invention.

[0040] In the figure: tool shank 1, steel ball 2, clutch part 3, steel ball a 4, transmission part 5, steel ball b 6, floating part 7, steel ball c 8, positioning part 9, steel ball d 10, chuck 11, spring 12, spring a 13, spring b 14, screw 15, vertical part 16, cage 17, cage a 18, cage b 19, O-ring 20, O-ring a 21, O-ring b 22, O-ring c 23, O-ring d 24, O-ring e 25, rolling ring 26, anti-slip column 27, positioning socket 28, positioning column 29, constant force device 30, constant force spring 31. Detailed implementation mode

[0041] To make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe in detail the implementation modes of the present invention with reference to the accompanying drawings.

[0042] The present invention provides a reamer tap tool shank. Please refer to Figures 1 - 10 , which includes tool shank 1, steel ball 2, clutch part 3, steel ball a 4, transmission part 5, steel ball b 6, floating part 7, steel ball c 8, positioning part 9, steel ball d 10, chuck 11, spring 12, spring a 13, spring b 14, screw 15, vertical part 16 and rolling ring 26;

[0043] The positioning step on the upper end face of the positioning part 9 is connected to the positioning step of the inner circular plane of the tool shank 1 through the O-ring 20. The lower step face of the positioning part 9 has a first flat groove. The inner circle of the first flat groove is a groove for placing the O-ring a 21, and the outer circle of the first flat groove is a groove for placing the O-ring b 22. The lower outer circle of the positioning part 9 is movably connected to the inner circle of the vertical part 16. The upper outer circle of the positioning part 9 has a hole for placing the constant force device 30, and there is a groove for placing the constant force spring 31 in the hole. The center of the positioning part 9 has a hole for placing the spring b 14. The upper end face of the positioning part 9 has a cage b 19, and the lower outer circle of the positioning part 9 has a spring a 13.

[0044] The upper end face of the transmission part 5 has a second flat groove. The inner circle of the second flat groove is a groove for placing the O-ring d 24, and the outer circle of the second flat groove is a groove for placing the O-ring c 23. The lower outer circle of the transmission part 5 has a groove for placing the steel ball a 4. The step face of the transmission part 5 has a cage a 18 and is connected to the rolling ring 26. There are two wire withdrawal anti-slip holes on the plane of the transmission part 5, and there are two anti-slip columns 27 in the wire withdrawal anti-slip holes. The floating part 7 and the steel ball b 6 are arranged in the inner and outer circles of the upper end face flat groove of the transmission part 5. The inner and outer circles in the second flat groove of the transmission part 5 respectively have the O-ring a 21 and the O-ring b 22.

[0045] The lower end face of the tool shank 1 has a positioning socket 28. A positioning post 29 is provided on the screw 15, and the positioning post 29 is composed of a spring and an inclined post. The tool shank 1 can drive the chuck 11 to rotate through steel balls 2, a clutch member 3, steel ball a 4, a transmission member 5, steel ball b 6, a floating member 7, steel ball c 8, a positioning member 9, and steel ball d 10. The inner circle of the positioning member 9 is connected to the chuck 11 through the steel ball d 10, and the chuck 11 makes an up-and-down axial movement in the hole of the positioning member 9 by the rolling of the steel ball d 10. The outer circle of the chuck 11 has a rolling groove for placing the steel ball d 10, and the middle hole is for installing a spring b 14. The upper end of the spring b 14 is connected to the inner circle center hole of the tool shank 1. Steel ball grooves for placing the steel balls 2 are provided on the inner circle of the tool shank 1 and the outer circle of the clutch member 3, and the tool shank 1 and the clutch member 3 are connected through the steel balls 2. The upper end face of the clutch member 3 has an inclined groove for placing the steel ball a 4. A spring 12 is provided between the tool shank 1 and the chuck 11.

[0046] The inner circle step surface of the screw 15 is connected to the vertical member 16 through a cage 17. The inner circle of the vertical member 16 is movably connected to the lower end of the outer circle of the positioning member 9. The lower end of the outer circle of the vertical member 16 is connected to the screw 15 through an O-ring e 25.

[0047] The floating member 7 is an ordinary cross coupling. The upper and lower steps are in the X and Y directions. The upper step of the floating member 7 and the steel ball c 8 are in the first plane groove on the lower step surface of the positioning member 9.

[0048] Working principle: The tool shank main body 1 connected to the machine tool spindle drives the chuck 11 to rotate through the steel balls 2, the clutch member 3, the steel ball a 4, the transmission member 5, the steel ball b 6, the floating member 7, the steel ball c 8, the positioning member 9, and the steel ball d 10. The steel ball groove on the inner circle of the tool shank 1 and the steel ball groove on the outer circle of the clutch member 3 are connected through the steel balls 2.

[0049] There is a positioning step at the exact center of the inner circle of the tool shank 1. The positioning member 9 is positioned through an O-ring 20 to ensure the concentricity of the positioning member 9 and the tool shank 1.

[0050] The outer circle of the clutch member 3 has a groove for the steel ball 2. The inner circle step surface has two arc-shaped wire-retreating anti-slip one-way grooves. The anti-slip one-way groove is an inclined surface with one end high and the other end low. One end is connected to the plane at an inclined surface, and the other end is connected to the plane in a stepped shape. The upper end face of the clutch member 3 has an inclined groove for the steel ball a 4, and drives the transmission member 5 to rotate through the steel ball a 4.

[0051] The torque of the reamer and tap is adjusted by screw 15. The torque of the reamer and tap is controlled by the pressure of spring 12 and transmission part 3 on steel ball a4. When the torque of the reamer and tap is greater than the pressure of steel ball a4 on the radial groove of transmission part 5, steel ball a4 will "slip". It repeatedly enters and leaves the radial groove of transmission part 5, makes a circular slide on the outer circle of transmission part 5, and makes repeated small radial movements. At the same time, clutch part 3 and steel ball 2 also make repeated axial movements. At this time, transmission part 5 no longer rotates with steel ball a4. "Slipping" is to protect the reamer and tap and prevent the reamer and tap from breaking due to excessive torque when encountering resistance during reaming and tapping;

[0052] The step surface of transmission part 5 has cage a18, which is connected to rolling ring 26 and plays a role in reducing friction. There are two thread withdrawing anti-slip holes on the plane of transmission part 5, and there are two anti-slip columns 27 in the holes. The inclined surface step on clutch part 3 is used to prevent the tap from "slipping" during thread withdrawal. Since the inclined groove on clutch part 3 is one-way, the tap can "slip" during tapping, but it cannot "slip" during thread withdrawal. During thread withdrawal, clutch part 3 directly drives transmission part 5 to withdraw the thread through anti-slip column 27, thus ensuring the safety of thread withdrawal. In the plane groove on the upper end surface of transmission part 5 are floating part 7 and steel ball b6. Floating part 7 and steel ball b6 can float in the groove. There is O-ring a21 on the inner circle and O-ring b22 on the outer circle of the plane groove on the upper end surface of transmission part 5. The O-rings are used to position floating part 7 and steel ball b6, prevent floating part 7 and steel ball b6 from being eccentric, and prevent steel ball b6 from falling during assembly;

[0053] Floating part 7 is a common type of cross coupling. The upper and lower steps are in the X and Y directions. The upper step of floating part 7 and steel ball c8 are in the plane groove on the lower step surface of positioning part 9;

[0054] The outer circle of the plane groove on the lower step surface of the positioning part 9 is the O-ring c23, and there is an O-ring d24 on the inner circle of the groove. The O-ring positions the steel ball c8 and the floating part 7, and when assembling, the steel ball c8 will not fall off. The center of the upper end surface of the positioning part 9 is a positioning step, which is in direct contact with the positioning step on the inner circle plane of the tool holder body 1 through the O-ring 20 to ensure concentricity. In this way, the tungsten carbide reamer and the tungsten carbide tap not only enter the hole safely and smoothly, but also avoid single-edge cutting of the tungsten carbide reamer and the tungsten carbide tap. Because the O-ring is a soft body, it does not affect the free floating during machining of steel parts. The outer circle of the upper end surface of the positioning part 9 is the cage b19, which only plays a role in floating. When it contacts the tool holder 1 and the positioning part 9, it only ensures the perpendicularity of the positioning part 9 to the tool holder 1, but does not ensure concentricity with the tool holder 1. There is a spring a13 on the outer circle at the lower end of the positioning part 9, which is connected to the vertical part 16 through the spring 13. There is a hole for the constant force device 30 on the outer circle of the upper end of the positioning part 9, and there is a spring groove on the outer circle of the hole, and there is a constant force spring 31 in the groove. There is a spring and an inclined column in the constant force device. The axial pressure of the chuck 11 is constant through the constant force device 30. During reaming and tapping, the downward pressure is constant, ensuring that the depth of each reamer or tap is the same. The inner circle of the positioning part 9 is connected to the chuck 11 through the steel ball d10, and the chuck 11 makes axial movement up and down in the hole of the positioning part 9 through the rolling of the steel ball d10;

[0055] During reaming or tapping, the steel ball b6, the floating part 7, the steel ball c8, and the positioning part 9 can roll and float freely according to needs, keeping the reamer or tap concentric with the bottom hole and preventing single-edge cutting from causing the edge to crack and affecting the service life of the tungsten carbide reamer or tap. Due to the rolling friction method, the friction resistance of the reamer or tap under load is only one-tenth of the sliding friction resistance of similar products. Therefore, ultra-high precision can be achieved during reaming, and the processed thread can meet the detection of the go-no-go gauge;

[0056] The inner circle of the vertical part 16 is movably connected to the outer circle at the lower end of the positioning part 9. The outer circle at the lower end of the vertical part 16 is connected to the screw 15 through the O-ring e25 to prevent waste chips from entering the inside of the tool holder. The lower step surface of the vertical part 16 is connected to the screw 15 through the cage 17. The positioning part 9 and the vertical part 16 can freely float in the XY direction on the inner circle step plane of the screw 15 through the steel balls on the cage 17. Rotating the screw 15, through the spring a13, adjusts the concentricity and perpendicularity pressure of the positioning part 9 on the tool holder 1. At the same time, the positioning part 9 has a certain degree of radial floating and angular floating freedom relative to the tool holder 1;

[0057] The inner circle thread of the tool holder 1 is connected to the screw 15. Rotating the screw 15 adjusts the torque of the reamer or tap, and at the same time, it is also the pressure required to adjust the concentricity and perpendicularity of the reamer or tap to the tool holder. When the torque of the reamer or tap is large, correspondingly, the diameter of the reamer or tap will be larger and the length will be longer, and the axial pressure required for its concentricity and perpendicularity will also be larger. This combined structure greatly simplifies the internal space of the tool holder;

[0058] When the reamer or tap encounters waste chips clogging the bottom in a blind hole, when the reamer or tap is jammed by waste chips, when the bottom hole is small and the drill is too skewed, or when the set depth is deeper than the actual depth of drilling, etc., in such cases, the reamer or tap cannot continue to advance along with the tool shank 1. Instead, it breaks through the limiting pressure of the constant force spring, and the chuck 11 makes an axial movement in the positioning member 9 to ensure the safety of the tungsten carbide reamer and tungsten carbide tap. When the tool shank retreats, the chuck 11 is reset by the spring b14;

[0059] The outer circle of the chuck 11 has a rolling groove for the steel ball d10, and the middle hole is for installing the spring b14. The upper end of the spring b14 is connected to the central hole of the inner circle of the tool shank 1. When the reamer and tap slip and do not rotate, but the tool shank 1 continues to move downward to compress the spring b14 to eliminate the axial pressure of the tool shank 1 on the reamer and tap, the chuck 11 is for clamping the tungsten carbide reamer and tungsten carbide tap.

[0060] The positioning post 29 on the screw 15 is composed of a spring and an inclined post, which is convenient to rotate and accurately positioned. The positioning post 29 on the screw 15 is connected to the positioning socket 28 on the inner circle of the tool shank 1 to prevent the screw 15 from shifting due to the vibration generated when reaming or tapping "slips".

[0061] Although the present invention has been described with reference to the embodiments above, however, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way. The reason for not exhaustively describing the situations of these combinations in this specification is only to save space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A reamer tap handle, comprising a handle (1), a steel ball (2), a clutch member (3), a steel ball a (4), a transmission member (5), a steel ball b (6), a floating member (7), a steel ball c (8), a positioning member (9), a steel ball d (10), a chuck (11), a spring (12), a spring a (13), a spring b (14), a screw (15), a vertical member (16), a cage (17), a cage a (18), a cage b (19), characterized in that, The upper positioning step of the positioning member (9) is connected to the inner circular plane positioning step of the tool shank (1) through an O-ring (20); The lower step surface of the positioning member (9) has a first flat groove. The inner circle of the first flat groove is a groove for placing O-ring a (21), and the outer circle of the first flat groove is a groove for placing O-ring b (22); The upper end surface of the transmission member (5) has a second flat groove. The inner circle of the second flat groove is a groove for placing O-ring d (24), and the outer circle of the second flat groove is a groove for placing O-ring c (23); The lower end surface of the tool shank (1) has a positioning socket (28). The screw (15) is provided with a positioning post (29), and the positioning post (29) is composed of a spring and an inclined post; The outer circle of the lower end of the positioning member (9) is movably connected to the inner circle of the vertical member (16). The outer circle of the upper end of the positioning member (9) has a hole for placing a constant force device (30), and there is a groove for placing a constant force spring (31) in the hole. The center of the positioning member (9) has a hole for placing spring b (14). The upper end surface of the positioning member (9) has a cage b (19), and the outer circle of the lower end of the positioning member (9) has spring a (13); The inner circular step surface of the screw (15) is connected to the vertical member (16) through a cage (17). The inner circle of the vertical member (16) is movably connected to the outer circle of the lower end of the positioning member (9). The outer circle of the lower end of the vertical member (16) is connected to the screw (15) through an O-ring e (25); The tool shank (1) can drive the chuck (11) to rotate through steel balls (2), a clutch member (3), steel ball a (4), a transmission member (5), steel ball b (6), a floating member (7), steel ball c (8), a positioning member (9), and steel ball d (10). The inner circle of the positioning member (9) is connected to the chuck (11) through steel ball d (10), and the chuck (11) makes axial movement up and down in the hole of the positioning member (9) through the rolling of steel ball d (10). The outer circle of the chuck (11) has a rolling groove for placing steel ball d (10), and the middle hole is for installing spring b (14). The upper end of the spring b (14) is connected to the inner circular center hole of the tool shank (1). A spring (12) is provided between the tool shank (1) and the chuck (11); Both the inner circle of the tool shank (1) and the outer circle of the clutch member (3) are provided with steel ball grooves for placing steel balls (2), and the tool shank (1) is connected to the clutch member (3) through steel balls (2). The upper end surface of the clutch member (3) has an inclined groove for placing steel ball a (4); The lower end of the outer circle of the transmission part (5) has a groove for placing steel ball a (4). The step surface of the transmission part (5) has a cage a (18) and is connected to the rolling ring (26). There are two wire-removing anti-slip holes on the plane of the transmission part (5), and there are two anti-slip columns (27) in the wire-removing anti-slip holes. A floating part (7) and a steel ball b (6) are arranged in the plane groove on the upper end surface of the transmission part (5). The inner and outer circles in the second plane groove of the transmission part (5) respectively have an O-ring a (21) and an O-ring b (22). The floating part (7) is a common type of cross coupling, and the upper and lower steps are in the X and Y directions. The upper step of the floating part (7) and the steel ball c (8) are in the first plane groove on the lower step surface of the positioning part (9).

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