Rigid telescopic tapping cutter handle

Abstract

The utility model relates to the technical field of machining cutters, and particularly discloses a rigid telescopic tapping cutter handle which comprises a cutter handle body, a rotating block is arranged outside the lower end of the cutter handle body through threads, a chuck matched with the rotating block is arranged inside the lower end of the cutter handle body and corresponds to the rotating block, and a twisting block is rotationally arranged on the outer ring face of the rotating block. A plurality of elastic sheets are arranged on the outer ring surface of the rotating block; under the action of the elastic piece, the twisting block and the rotating block are temporarily in a fixed connection state, the resistance of the rotating block during rotation is larger than the elastic force of the elastic piece, at the moment, the elastic piece is excessively stressed and bent to cause the twisting block to idle, namely, the twisting block cannot drive the rotating block to rotate through the elastic piece; therefore, the phenomenon that the chuck in the tapping cutter handle is easily damaged when a worker excessively tightens the nut can be avoided, and compared with a traditional scheme, the internal chuck is not prone to being damaged due to too large stress when the tapping cutter is used.

Description

Technical Field

[0001] The utility model relates to the technical field of machining tools, in particular to a rigid telescopic tapping tool shank. Background Technique

[0002] When in use, the rigid telescopic tapping tool shank plays a connecting role, that is, one end of the tapping tool shank is connected to the machine tool, and the other end is used for inserting the tool for tapping. However, no corresponding torque limiting component is provided at the nut of the existing tapping tool shank, so that when the operator rotates the nut to clamp the tool, it is easy to over-tighten, resulting in the chuck in the tapping tool shank being easily damaged due to over-clamping. Therefore, in order to solve the above technical problems, we propose a rigid telescopic tapping tool shank. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a rigid telescopic tapping tool shank is proposed.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A rigid telescopic tapping tool shank includes a tool shank body. The outer part of the lower end of the tool shank body is provided with a rotating block through a thread. A chuck matching the rotating block is provided inside the lower end of the tool shank body. A twisting block is rotatably arranged on the outer ring surface of the rotating block. A number of elastic pieces are provided on the outer ring surface of the rotating block. A number of clamping grooves are provided on the inner wall of the twisting block corresponding to the elastic pieces. One end of the elastic piece far away from the rotating block is inserted into the adjacent clamping groove. A first rotating ring is rotatably arranged at the lower end of the outer ring surface of the rotating block. The outer ring surface of the first rotating ring is fixedly connected with the inner wall of the twisting block. A number of limiting holes are jointly provided between the first rotating ring and the lower end of the rotating block. A pin is inserted into the limiting hole.

[0006] Preferably, a number of installation grooves are provided in the middle of the rotating block corresponding to the elastic pieces, and one end of the elastic piece far away from the twisting block extends outside the installation groove.

[0007] Preferably, a connecting cylinder is installed inside the rotating block corresponding to the installation groove through a screw. The inner ring surface of the connecting cylinder is provided with a thread and is threadedly connected with the outer ring surface of the lower end of the tool shank body.

[0008] Preferably, a second rotating ring is rotatably arranged at the upper end of the outer ring surface of the rotating block. The outer ring surface of the second rotating ring is fixedly connected with the inner ring surface of the twisting block.

[0009] Preferably, protective sheets are provided on the upper and lower surfaces of the rotating block and the twisting block, and the protective sheets are connected with the twisting block through screws.

[0010] Preferably, the pin is a quick-release pin, and the inner wall of the limiting hole is a smooth surface.

[0011] Preferably, the cross section of the twisting block is hexagonal, and the outer ring surface of the twisting block is provided with anti-slip lines.

[0012] A rigid telescopic tapping tool holder proposed by the present utility model has the beneficial effects as follows:

[0013] 1: In the present utility model, under the action of the elastic piece, the twisting block and the rotating block are temporarily in a fixed connection state. That is, when the operator rotates the twisting block, the twisting block drives the rotating block to rotate through the elastic piece, thereby clamping and locking the chuck. When the operator over-tightens the twisting block, that is, when the resistance during the rotation of the rotating block is greater than the elastic force of the elastic piece, the elastic piece is over-stressed and bends at this time. That is, when the twisting block rotates at this time, it will bend the elastic piece so that the end of the elastic piece moves out of the card slot on the inner wall of the twisting block, resulting in the idling of the twisting block. That is, the twisting block cannot drive the rotating block to rotate through the elastic piece. Thus, it can avoid the phenomenon that the chuck inside the tapping tool holder is easily damaged when the operator over-tightens the nut. Therefore, compared with the traditional scheme, the chuck inside the present scheme is not easily damaged due to excessive stress during use.

[0014] 2: The setting of the installation groove in the present utility model facilitates the operator to replace the elastic piece. That is, after long-term use, when the elastic force of the elastic piece decreases due to fatigue, the operator can conveniently replace the elastic piece. At the same time, the number of elastic pieces can also be selected according to specific usage requirements as appropriate, so as to adjust the torque transmitted from the rotating block to the chuck; the setting of the connecting cylinder can, on the one hand, block the installation groove, that is, prevent the movement of the elastic piece from affecting the torque limitation, and on the other hand, the connecting cylinder can be used for the connection between the rotating block and the tool holder body; the setting of the second rotating ring makes the connection between the twisting block and the rotating block more stable; the setting of the protection piece facilitates the sealing of the gap between the rotating block and the twisting block, thereby preventing foreign debris from entering this gap and affecting the movement of the elastic piece; the setting of the pin facilitates the control of the connection relationship between the rotating block and the twisting block. That is, by inserting and removing the pin, the rotating block and the twisting block are in a fixed connection or a rotating connection. Description of the Drawings

[0015] Figure 1 Isometric schematic diagram of a rigid telescopic tapping tool holder proposed by the present utility model;

[0016] Figure 2 Structural schematic diagram of a rigid telescopic tapping tool holder proposed by the present utility model;

[0017] Figure 3 Cross-sectional view of the rotating block and the twisting block of a rigid telescopic tapping tool holder proposed by the present utility model;

[0018] Figure 4 Schematic diagram of the cooperation between the elastic piece and the rotating block of a rigid telescopic tapping tool holder proposed by the present utility model;

[0019] Figure 5Schematic diagram of the separation of the rotating block and the twisting block of a rigid telescopic tapping tool shank proposed by the present utility model.

[0020] In the figure: 1, tool shank body; 2, rotating block; 3, chuck; 4, twisting block; 5, elastic piece; 6, clamping groove; 7, first rotating ring; 8, limiting hole; 9, pin; 10, connecting cylinder; 11, second rotating ring; 12, protection piece. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Embodiment 1

[0023] Referring to Figures 1-5 , a rigid telescopic tapping tool shank includes a tool shank body 1. The outer part of the lower end of the tool shank body 1 is provided with a rotating block 2 through a thread. A chuck 3 that cooperates with the rotating block 2 is provided inside the lower end of the tool shank body 1. A twisting block 4 is rotatably provided on the outer ring surface of the rotating block 2. A number of elastic pieces 5 are provided on the outer ring surface of the rotating block 2. A number of clamping grooves 6 corresponding to the elastic pieces 5 are provided on the inner wall of the twisting block 4. One end of the elastic piece 5 away from the rotating block 2 is inserted into the adjacent clamping groove 6. A first rotating ring 7 is rotatably provided at the lower end of the outer ring surface of the rotating block 2. The outer ring surface of the first rotating ring 7 is fixedly connected to the inner wall of the twisting block 4. A number of limiting holes 8 are jointly provided between the first rotating ring 7 and the lower end of the rotating block 2. A pin 9 is inserted into the limiting hole 8.

[0024] Embodiment 2

[0025] Referring to Figures 1-5 , in the case where other parts are the same as those in Embodiment 1, the difference between this embodiment and Embodiment 1 lies in:

[0026] In the middle of the rotating block 2, a number of mounting grooves are provided corresponding to the elastic piece 5. One end of the elastic piece 5 away from the twisting block 4 extends to the outside of the mounting groove. The setting of the mounting groove facilitates the replacement of the elastic piece 5 by personnel. That is, after long-term use, when the elastic piece 5 is fatigued and its elastic force decreases, personnel can conveniently replace the elastic piece 5. At the same time, the number of elastic pieces 5 can also be selected as appropriate according to specific usage requirements, so as to adjust the torque transmitted from the rotating block 2 to the chuck 3; a connecting cylinder 10 is installed in the inner side of the rotating block 2 corresponding to the mounting groove through screws. The inner ring surface of the connecting cylinder 10 is provided with threads and is threadedly connected to the outer ring surface of the lower end of the tool holder main body 1. The setting of the connecting cylinder 10 can, on the one hand, shield the mounting groove, that is, prevent the elastic piece 5 from moving and affecting torque limitation, and on the other hand, the connecting cylinder 10 can be used for the connection between the rotating block 2 and the tool holder main body 1; a second rotating ring 11 is rotatably provided at the upper end of the outer ring surface of the rotating block 2. The outer ring surface of the second rotating ring 11 is fixedly connected to the inner ring surface of the twisting block 4. The setting of the second rotating ring 11 makes the connection between the twisting block 4 and the rotating block 2 more stable.

[0027] Protective sheets 12 are provided on the upper and lower surfaces of the rotating block 2 and the twisting block 4. The protective sheets 12 are connected to the twisting block 4 through screws. The setting of the protective sheets 12 facilitates the sealing of the gap between the rotating block 2 and the twisting block 4, thereby preventing external debris from entering this gap and affecting the movement of the elastic piece 5; the plug pin 9 is a quick-release pin, and the inner wall of the limit hole 8 is a smooth surface. The setting of the plug pin 9 facilitates the control of the connection relationship between the rotating block 2 and the twisting block 4. That is, through the insertion and removal of the plug pin 9, the rotating block 2 and the twisting block 4 are fixedly connected or rotatably connected; the cross section of the twisting block 4 is hexagonal, and the outer ring surface of the twisting block 4 is provided with anti-slip lines. Since the cross section of the twisting block 4 is hexagonal, it is convenient for personnel to rotate it, and the setting of the anti-slip lines further improves the rotation convenience of personnel for the twisting block 4.

[0028] Principle of use and advantages: In the process of using the present utility model, the tapping tool holder proposed by this solution is connected to an external machine tool through the tool holder main body 1, that is, the external machine tool drives the tool holder main body 1 to rotate, and the tool holder main body 1 drives the tool to rotate through the chuck 3, so as to perform corresponding tapping treatment on an external workpiece through the tool. In the above process, because the elastic piece 5 has elasticity, that is, personnel control the number of elastic pieces 5 according to specific usage requirements, so that the resistance generated when the elastic piece 5 deforms is slightly less than the maximum clamping force that the chuck 3 can bear. That is, when the rotating block 2 rotates, it clamps the chuck 3, so as to clamp and fix the tool inserted inside the chuck 3 through the chuck 3.

[0029] Furthermore, during the process of the above-mentioned personnel rotating the twisting block 4, under the action of the elastic piece 5, the twisting block 4 and the rotating block 2 are temporarily in a fixed connection state. That is, when the personnel rotate the twisting block 4, the twisting block 4 drives the rotating block 2 to rotate through the elastic piece 5, thereby clamping and locking the chuck 3. When the personnel overtighten the twisting block 4, that is, the resistance during the rotation of the rotating block 2 is greater than the elastic force of the elastic piece 5, at this time the elastic piece 5 is overstressed and bends. That is, when the twisting block 4 rotates at this time, it will bend the elastic piece 5 so that the end of the elastic piece 5 moves out of the clamping groove 6 on the inner wall of the twisting block 4, resulting in the idling of the twisting block 4. That is, the twisting block 4 cannot drive the rotating block 2 to rotate through the elastic piece 5. Thus, the phenomenon that the chuck 3 in the tapping tool handle is easily damaged when the personnel overtighten the nut can be avoided.

[0030] It should be further explained that the setting of the installation groove facilitates the personnel to replace the elastic piece 5. That is, after long-term use, when the elastic force of the elastic piece 5 decreases due to its own fatigue, the personnel can conveniently replace the elastic piece 5. At the same time, the number of elastic pieces 5 can also be selected as appropriate according to specific usage requirements, so as to adjust the torque transmitted from the rotating block 2 to the chuck 3. The setting of the connecting cylinder 10 can, on the one hand, shield the installation groove, that is, prevent the elastic piece 5 from moving and affecting the torque limitation. On the other hand, the connecting cylinder 10 can be used for the connection between the rotating block 2 and the tool handle main body 1. The setting of the second rotating ring 11 makes the connection between the twisting block 4 and the rotating block 2 more stable. The setting of the protective piece 12 facilitates the blocking of the gap between the rotating block 2 and the twisting block 4, thereby preventing external debris from entering this gap and affecting the movement of the elastic piece 5. The setting of the pin 9 facilitates the control of the connection relationship between the rotating block 2 and the twisting block 4. That is, by inserting and removing the pin 9, the rotating block 2 and the twisting block 4 are in a fixed connection or a rotating connection. Since the cross-section of the twisting block 4 is hexagonal, it is convenient for the personnel to rotate it, and the setting of the anti-slip pattern further improves the convenience of the personnel to rotate the twisting block 4.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A rigid telescopic tapping tool holder, comprising a tool holder body (1), characterized in that, The outer part of the lower end of the tool handle body (1) is provided with a rotating block (2) through a thread. A chuck (3) that matches the rotating block (2) is provided inside the lower end of the tool handle body (1). A twisting block (4) is rotatably arranged on the outer ring surface of the rotating block (2). A number of elastic pieces (5) are provided on the outer ring surface of the rotating block (2). A number of clamping grooves (6) are provided on the inner wall of the twisting block (4) corresponding to the elastic pieces (5). One end of the elastic piece (5) away from the rotating block (2) is inserted into the adjacent clamping groove (6). A first rotating ring (7) is rotatably arranged at the lower end of the outer ring surface of the rotating block (2). The outer ring surface of the first rotating ring (7) is fixedly connected to the inner wall of the twisting block (4). A number of limiting holes (8) are jointly provided between the first rotating ring (7) and the lower end of the rotating block (2). A pin (9) is inserted into the limiting hole (8).

2. The rigid telescopic tapping tool shank according to claim 1, characterized in that, A number of mounting grooves are provided in the middle of the rotating block (2) corresponding to the elastic pieces (5). One end of the elastic piece (5) away from the twisting block (4) extends to the outside of the mounting groove.

3. The rigid telescopic tapping tool shank according to claim 2, wherein, A connecting cylinder (10) is installed inside the rotating block (2) corresponding to the mounting groove through a screw. The inner ring surface of the connecting cylinder (10) is provided with a thread and is threadedly connected to the outer ring surface of the lower end of the tool handle body (1).

4. A rigid telescopic tapping tool shank according to claim 1, characterized in that, A second rotating ring (11) is rotatably arranged at the upper end of the outer ring surface of the rotating block (2). The outer ring surface of the second rotating ring (11) is fixedly connected to the inner ring surface of the twisting block (4).

5. A rigid telescopic tapping tool shank according to claim 1, characterized in that, Protective sheets (12) are provided on both the upper and lower surfaces of the rotating block (2) and the twisting block (4). The protective sheets (12) are connected to the twisting block (4) through screws.

6. The rigid telescopic tapping tool shank according to claim 1, wherein The pin (9) is a quick-release pin, and the inner wall of the limiting hole (8) is a smooth surface.

7. A rigid telescopic tapping tool shank according to claim 1, wherein The cross-section of the twisting block (4) is hexagonal, and the outer ring surface of the twisting block (4) is provided with anti-slip lines.

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