Cutter and cutter locking device

Abstract

The utility model discloses a cutter and a cutter locking device. The cutter locking device comprises a connecting thread sleeve used for being connected with a cutter head, a pressing shaft used for being arranged in a cutter handle, a rotatable adjusting piece, a telescopic elastic body and a first retainer used for being connected with the cutter handle in a locking mode. The adjusting piece and the elastic body are arranged at the two ends of the pressing shaft. One end of the adjusting part is positioned in the cutter handle, and the other end is in threaded connection with the pressing shaft for driving the pressing shaft to axially move; one end of the elastic body is positioned in the cutter handle, and the other end props against the shaft end of the pressing shaft; the first retainer is connected with the adjusting part and / or the pressing shaft and is used for preventing the adjusting part and the pressing shaft from moving when the cutter handle is locked; the connecting thread sleeve is provided with a first driving face, and the pressing shaft is provided with a second driving face which is attached to and extrudes the first driving face towards the elastic body. The adjusting piece can drive the pressing shaft to move precisely, and the pressing shaft can press the connecting thread sleeve through the first retainer. And the elastic body can reversely apply pressure to the pressing shaft, so that the self-locking phenomenon of the pressing shaft is avoided.

Description

Technical Field

[0001] The present application relates to the field of cutting tools, and in particular to a cutting tool locking device, and also to a cutting tool, comprising the aforementioned cutting tool locking device. Background Art

[0002] For machining tools such as boring tools, the tool head and the tool handle are separated from each other, so a locking structure is usually provided between the two to achieve locking and positioning of the tool head on the tool handle.

[0003] For example, a screw sleeve is provided in the tool handle, and the tool head is installed on the screw sleeve. Due to the limitations of factors such as the actual installation effect and the stress state of the tool, the screw sleeve will inevitably produce slight deflection and movement in the tool handle, affecting the use of the tool head. For this reason, an anti-rotation limit pin and a locking screw are also provided in the tool handle. The anti-rotation limit pin can prevent the screw sleeve from deflecting and moving in the tool handle by fitting and squeezing the surface of the screw sleeve through its inclined surface, thereby achieving locking and positioning of the tool head. The locking screw is provided at one end of the anti-rotation limit pin, which can push the anti-rotation limit pin to fit and squeeze the screw sleeve, so that the surfaces of the anti-rotation limit pin and the screw sleeve are closely fitted, so that the anti-rotation limit pin applies pressure toward the circumference of the screw sleeve to prevent the screw sleeve from deflecting and moving in the tool handle.

[0004] However, the above locking structure has defects that cannot be ignored: (1) The locking screw has poor adjustment accuracy for the anti-rotation limit pin, and it is difficult for the operator to accurately adjust the interaction force between the anti-rotation limit pin and the screw sleeve; (2) When the interaction force between the anti-rotation limit pin and the screw sleeve is too large, the anti-rotation limit pin is prone to self-locking, which makes the screw sleeve unable to be adjusted, and further makes it impossible for the operator to accurately adjust the installation position and angle of the cutter head. Utility Model Content

[0005] The purpose of the present application is to provide a tool locking device that can not only lock and position a screw sleeve connected to a tool head, but also prevent the screw sleeve from self-locking, thereby ensuring that the operator can accurately adjust the installation position and angle of the tool head. The present application also provides a tool, including the aforementioned tool locking device.

[0006] To achieve the above-mentioned purpose, the present application provides a tool locking device, comprising a connecting screw sleeve for connecting a tool head, a pressing shaft for being arranged in a tool handle, a rotatable adjusting member, a retractable elastic body and a first stopper for being locked and connected with the tool handle;

[0007] The adjusting member and the elastic body are respectively arranged at two axial ends of the clamping shaft; one end of the adjusting member is positioned in the tool handle, and the other end of the adjusting member is threadedly connected with the clamping shaft to drive the clamping shaft to move axially; the elastic body is retracted and contracted along the axial direction of the clamping shaft, one end of the elastic body is positioned in the tool handle, and the other end of the elastic body is pressed against the axial end of the clamping shaft toward the adjusting member;

[0008] The first stopper is connected to the adjusting member and / or the pressing shaft, and is used to prevent the adjusting member and the pressing shaft from moving when the tool handle is locked;

[0009] A first driving surface is arranged on the peripheral side of the connecting screw sleeve; a second driving surface is arranged on the peripheral side of the pressing shaft, and the second driving surface is pressed against the first driving surface toward the elastic body.

[0010] In some embodiments, the first stopper includes a first threaded fastener; the adjusting member is in the shape of a sleeve, and the first threaded fastener passes through the adjusting member and presses against the clamping shaft.

[0011] In some embodiments, the sleeve hole of the adjusting member includes a threaded hole and a wrench hole that are interconnected, and the threaded hole is threadedly connected to the clamping shaft.

[0012] In some embodiments, a second stopper is also included for lockingly connecting with the knife handle; the elastic body is clamped between the second stopper and the clamping shaft.

[0013] In some embodiments, the second stopper comprises a second threaded fastener; the second threaded fastener has a diameter greater than a diameter of the first threaded fastener.

[0014] In some embodiments, the resilient body comprises a disc spring.

[0015] In some embodiments, a groove is provided on the circumferential side of the clamping shaft for a portion of the connecting screw sleeve to be embedded in; a partial surface of the groove is the second driving surface, and the remaining surface of the groove is separated from the connecting screw sleeve.

[0016] In some embodiments, the first drive surface and the second drive surface are both planar.

[0017] In some embodiments, the connecting screw sleeve and the pressing shaft are perpendicular to each other.

[0018] The present application also provides a tool, including a tool head, a tool handle and the above-mentioned tool locking device; a first mounting hole and a second mounting hole are provided in the tool handle, a connecting screw sleeve is inserted and fixed in the first mounting hole, a clamping shaft, an adjusting member and an elastomer are all installed in the second mounting hole; the tool head is fixed to the connecting screw sleeve.

[0019] With respect to the above-mentioned background technology, the tool locking device provided in the present application includes a connecting screw sleeve for connecting the tool head, a clamping shaft for being arranged in the tool handle, a rotatable adjusting member, a retractable elastomer and a first stop member for being locked and connected with the tool handle; the aforementioned adjusting member and the aforementioned elastomer are respectively arranged at the axial ends of the clamping shaft; one end of the adjusting member is positioned in the tool handle, and the other end of the adjusting member is threadedly connected to the clamping shaft for driving the clamping shaft to move axially; the aforementioned elastomer is retracted and contracted along the axial direction of the clamping shaft, one end of the elastomer is positioned in the tool handle, and the other end of the elastomer is pressed against the axial end of the clamping shaft toward the adjusting member; the aforementioned first stop member is connected to the adjusting member and / or the clamping shaft for preventing the adjusting member and the clamping shaft from moving when locking the tool handle; wherein, a first driving surface is provided on the circumferential side of the connecting screw sleeve; a second driving surface is provided on the circumferential side of the clamping shaft, and the second driving surface is pressed against the first driving surface toward the elastomer.

[0020] In the above-mentioned tool locking device, one end of the clamping shaft is provided with an adjusting member and a first stopper, and the other end of the clamping shaft is provided with an elastic body. The adjusting member is rotatably installed in the tool handle, and the adjusting member is threadedly connected to the clamping shaft, so that the rotating adjusting member can drive the clamping shaft to move along its own axial direction, thereby achieving fine adjustment of the axial displacement of the clamping shaft. The first stopper can be locked and connected to the tool handle, and the first stopper is connected to the adjusting member and / or the clamping shaft. When the first stopper locks the tool handle, the first stopper can prevent the adjusting member and the clamping shaft from moving. The elastic body is positioned in the tool handle, and the elastic body presses against the shaft end of the clamping shaft toward the adjusting member. When the adjusting member and the first stopper release the clamping shaft, the elastic body can release its elastic force toward the clamping shaft, thereby releasing the self-locking state of the clamping shaft.

[0021] In the above-mentioned tool locking device, a second driving surface is provided on the circumferential side of the clamping shaft, and a first driving surface is provided on the circumferential side of the connecting screw sleeve; the operator can drive the clamping shaft to move precisely through the adjusting member, and at the same time combine the first stop member to make the clamping shaft clamp the connecting screw sleeve, so that the second driving surface fits and squeezes the first driving surface, thereby applying pressure to the connecting screw sleeve to prevent the connecting screw sleeve from deflecting and moving in the tool handle.

[0022] In summary, it can be seen that the tool locking device can accurately adjust the clamping shaft through the adjusting piece, and combine with the first stop piece to apply pressure toward the clamping shaft, so that the second driving surface of the clamping shaft presses the first driving surface of the connecting screw sleeve, thereby preventing the connecting screw sleeve from deflecting and moving in the tool handle; at the same time, the tool locking device can also apply reverse pressure toward the clamping shaft through the elastomer to avoid self-locking of the clamping shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a tool locking device provided in an embodiment of the present application;

[0025] Figure 2 A partial enlarged view of the tool locking device provided in an embodiment of the present application at the first stop member.

[0026] Among them, 01-handle, 1-connecting screw sleeve, 2-clamping shaft, 3-adjusting piece, 4-elastic body, 5-first stopper, 6-second stopper. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a tool locking device provided in an embodiment of the present application; Figure 2 A partial enlarged view of the tool locking device provided in an embodiment of the present application at the first stop member.

[0030] The present application provides a tool locking device, including a connecting screw sleeve 1, a clamping shaft 2, a rotatable adjusting member 3, a retractable elastic body 4 and a first stop member 5; the connecting screw sleeve 1 is used to connect the tool head; the clamping shaft 2, the adjusting member 3, the elastic body 4 and the first stop member 5 are all arranged in the tool handle 01, wherein the clamping shaft 2 is slidably installed in the tool handle 01 along its own axial direction, the adjusting member 3 and the first stop member 5 are both arranged at one end of the clamping shaft 2, and the elastic body 4 is arranged at the other end of the clamping shaft 2.

[0031] In this embodiment, a first driving surface is provided on the circumference of the connecting screw sleeve 1, and a second driving surface is provided on the circumference of the clamping shaft 2; the second driving surface of the clamping shaft 2 can press the first driving surface of the connecting screw sleeve 1 toward the elastic body 4, and the pressure of the clamping shaft 2 on the connecting screw sleeve 1 is used to prevent the connecting screw sleeve 1 from deflecting and moving in the tool handle 01, thereby achieving the locking and positioning of the tool head. Among them, both the connecting screw sleeve 1 and the clamping shaft 2 are in the shape of a shaft sleeve.

[0032] In this embodiment, the adjusting member 3 and the elastic body 4 are respectively arranged at the two axial ends of the clamping shaft 2; the adjusting member 3 and the first stopper 5 are arranged at the same end of the clamping shaft 2. One end of the adjusting member 3 is positioned in the tool handle 01, and the other end of the adjusting member 3 is threadedly connected to the clamping shaft 2, and is used to drive the clamping shaft 2 to move axially. The elastic body 4 is retracted and contracted along the axial direction of the clamping shaft 2, one end of the elastic body 4 is positioned in the tool handle 01, and the other end of the elastic body 4 is pressed against the axial end of the clamping shaft 2 toward the adjusting member 3.

[0033] The adjusting member 3 can drive the clamping shaft 2 to move bidirectionally along the axial direction of the clamping shaft 2, and the rotation angle of the adjusting member 3 corresponds to the axial displacement of the clamping shaft 2, so the operator can finely adjust the axial displacement of the clamping shaft 2 through the adjusting member 3. The first stopper 5 can be locked and connected with the handle 01; the aforementioned first stopper 5 can be connected to the adjusting member 3 and / or the clamping shaft 2, and is used to prevent the adjusting member 3 and the clamping shaft 2 from moving when the first stopper 5 locks the handle 01; for example, the first stopper 5 is connected to the adjusting member 3, and when the first stopper 5 locks the handle 01, the first stopper 5 can prevent the adjusting member 3 from rotating, thereby indirectly preventing the clamping shaft 2 from moving, and vice versa, the first stopper 5 can prevent the clamping shaft 2 from moving and indirectly prevent the adjusting member 3 from rotating. The elastic body 4 is pressed against the axial end of the clamping shaft 2, and when the first stopper 5 and the adjusting member 3 release the clamping shaft 2, the elastic body 4 can release its elastic force toward the clamping shaft 2, so as to push and squeeze the clamping shaft 2 toward the adjusting member 3.

[0034] In summary, the tool locking device provided in the present application can finely adjust the clamping shaft 2 and apply pressure toward the clamping shaft 2 through the adjusting member 3 and the first stop member 5 to prevent the connecting screw sleeve 1 from deflecting and moving in the tool handle 01, thereby achieving locking and positioning of the tool head; the tool locking device provided in the present application can also apply reverse pressure toward the clamping shaft 2 through the elastomer 4. Once the first stop member 5 and the adjusting member 3 release the clamping shaft 2, the elastomer 4 can push the clamping shaft 2 to move toward the adjusting member 3, thereby releasing the self-locking state of the clamping shaft 2.

[0035] The tool locking device provided in the present application is further described below in conjunction with the accompanying drawings and implementation examples.

[0036] In some embodiments, the adjusting member 3 is sleeve-shaped, and the first stop member 5 includes a first threaded fastener; the first threaded fastener passes through the adjusting member 3 and is threadedly connected to the tool handle 01 , and one end of the first threaded fastener presses against the clamping shaft 2 .

[0037] In the above embodiment, the first threaded fastener connects the tool handle 01 and the clamping shaft 2, specifically, when the adjusting member 3 accurately adjusts the clamping shaft 2, the first threaded fastener can lock the tool handle 01 and press the clamping shaft 2, so as to constrain the position of the clamping shaft 2 in its axial direction, and ensure that the clamping shaft 2 can fit and extrude the connection screw sleeve 1 according to the pressure adjusted by the adjusting member 3. It can be seen that the first threaded fastener is installed on the tool handle 01 after the adjusting member 3 is adjusted. If the adjusting member 3 needs to be readjusted, it is often necessary to remove the first threaded fastener from the tool handle 01 first.

[0038] In the above embodiment, the adjusting member 3 is in the shape of a sleeve, and a sleeve hole is provided therein, and the sleeve hole includes a threaded hole and a wrench hole; wherein the threaded hole and the wrench hole are connected to each other, and the adjusting member 3 is threadedly connected to the pressing shaft 2 through the threaded hole, and the wrench hole of the adjusting member 3 can be plugged and connected with a wrench-like tool, thereby driving the adjusting member 3 to rotate. When the adjusting member 3 is provided with a sleeve hole, the first threaded fastener passes through the sleeve hole of the adjusting member 3.

[0039] In some embodiments, the tool locking device provided in the present application further includes a second stopper 6; the second stopper 6 is locked and connected to the tool handle 01, and the elastic body 4 is sandwiched between the second stopper 6 and the clamping shaft 2. It can be seen that in this embodiment, the second stopper 6 can realize the positioning and installation of the elastic body 4 in the tool handle 01, and is used to limit the position of the elastic body 4 in the axial direction of the clamping shaft 2.

[0040] The second stop member 6 may include a second threaded fastener; the second threaded fastener is inserted into the tool handle 01 and is threadedly connected to the tool handle 01. Adjusting the position of the second threaded fastener in the tool handle 01 can adjust the installation position and compression amount of the elastomer 4, so that the elastomer 4 and the adjustment member 3 cooperate with each other and jointly coordinate the locking effect of the clamping shaft 2 on the connecting screw sleeve 1.

[0041] Typically, the diameter of the second threaded fastener is greater than the diameter of the first threaded fastener.

[0042] In each of the embodiments provided above, the elastic body 4 may include a disc spring; one disc spring or a plurality of disc springs connected in series may be arranged between the second stop member 6 and the clamping shaft 2 .

[0043] For reference Figure 1 In some embodiments, a groove is provided on the circumferential side of the clamping shaft 2 for partially embedding the connecting screw sleeve 1 , a partial surface of the groove is set as the second driving surface, and the remaining surface of the groove is separated from the connecting screw sleeve 1 .

[0044] In the above embodiment, both the first driving surface and the second driving surface are planes. For example, the groove is arranged to penetrate along the radial direction of the clamping shaft 2, a part of the inner wall of the groove is a plane, which can be used as the second driving surface, and another part of the inner wall of the groove is a curved surface, which can be embedded in the connecting screw sleeve 1; a flat cut surface is provided on a part of the circumference of the connecting screw sleeve 1, and this flat cut surface can be used as the first driving surface.

[0045] In the embodiments provided above, the connecting screw sleeve 1 and the pressing shaft 2 can be perpendicular to each other, which is convenient for installation and adjustment.

[0046] The present application also provides a tool, including a tool head, a tool handle 01 and the tool locking device provided in the above embodiments; in the tool, a first mounting hole and a second mounting hole are provided in the tool handle 01, a connecting screw sleeve 1 is inserted and fixed in the first mounting hole, and a clamping shaft 2, an adjusting member 3 and an elastomer 4 are all installed in the second mounting hole; in the tool, the tool head is fixed to the connecting screw sleeve 1.

[0047] In some embodiments, a stop end surface is provided in the second mounting hole of the tool handle 01, and the stop end surface and the clamping shaft 2 are respectively located at two ends of the adjusting member 3, and can define the installation position of the adjusting member 3 in the second mounting hole together with the elastic body 4.

[0048] For the tool provided with the first stop 5 and the second stop 6, in order to ensure the positioning connection strength between the tool head and the tool handle 01 and to ensure long-term cutting processing of the tool, usually, after using the first stop 5 and the second stop 6 to lock the clamping shaft 2, sealant can be filled in the installation gap between the first stop 5 and the second stop 6 to further enhance the locking effect of the clamping shaft 2.

[0049] In summary, the tool and its tool locking device also provided in the present application group the adjusting member 3, the elastomer 4, the first stop member 5 and the second stop member 6 at the axial ends of the clamping shaft 2; the adjusting member 3 is used to finely adjust the axial displacement of the clamping shaft 2, and the adjusting member 3 combined with the first stop member 5 can make the clamping shaft 2 clamp the connecting screw sleeve 1, preventing the connecting screw sleeve 1 from deflecting and moving in the tool handle 01, thereby locking the tool handle 01 and the tool head; the elastomer 4 is also used to apply reverse pressure to the clamping shaft 2, so as to achieve the release of the self-locking state of the clamping shaft 2 by relying on the elastic force of the elastomer 4. In addition, if the self-locking degree of the clamping shaft 2 is so serious that the elastomer 4 cannot release the self-locking of the clamping shaft 2, the operator can also use a tool to push the clamping shaft 2 after removing the second stop member 6 and the elastomer 4, so that the clamping shaft 2 moves toward the adjusting member 3, thereby releasing the self-locking state of the clamping shaft 2.

[0050] It can be seen that the tool locking device provided in the present application can not only realize the locking positioning of the cutter head on the tool handle 01, but also prevent the cutter head from being locked due to the self-locking of the connecting screw sleeve 1, which is beneficial for the operator to accurately adjust the positioning position of the clamping shaft 2 in the tool handle 01, and facilitates the operator to adjust and position the cutter head.

[0051] The above is a detailed introduction to the tool and tool locking device provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A tool locking device, characterized in that: It comprises a connecting screw sleeve (1) for connecting a cutter head, a pressing shaft (2) for being arranged in a cutter handle (01), a rotatable adjusting member (3), a retractable elastic body (4) and a first stopper (5) for being locked and connected to the cutter handle (01); The adjusting member (3) and the elastic body (4) are respectively arranged at two axial ends of the clamping shaft (2); one end of the adjusting member (3) is positioned in the knife handle (01), and the other end of the adjusting member (3) is threadedly connected to the clamping shaft (2) for driving the clamping shaft (2) to move axially; the elastic body (4) is retracted and contracted along the axial direction of the clamping shaft (2), one end of the elastic body (4) is positioned in the knife handle (01), and the other end of the elastic body (4) is pressed against the axial end of the clamping shaft (2) toward the adjusting member (3); The first stopper (5) is connected to the adjusting member (3) and / or the pressing shaft (2) and is used to prevent the adjusting member (3) and the pressing shaft (2) from moving when the knife handle (01) is locked; A first driving surface is provided on the circumferential side of the connecting screw sleeve (1); a second driving surface is provided on the circumferential side of the clamping shaft (2), and the second driving surface is pressed against the first driving surface toward the elastic body (4).

2. The tool locking device according to claim 1, characterized in that: The first stopper (5) comprises a first threaded fastener; the adjusting member (3) is in the shape of a sleeve, and the first threaded fastener passes through the adjusting member (3) and presses against the pressing shaft (2).

3. The tool locking device according to claim 2, characterized in that: The sleeve hole of the adjusting member (3) comprises a threaded hole and a wrench hole which are interconnected, and the threaded hole is threadedly connected to the pressing shaft (2).

4. The tool locking device according to claim 2, characterized in that: It also comprises a second stopper (6) for lockingly connecting with the knife handle (01); the elastic body (4) is sandwiched between the second stopper (6) and the clamping shaft (2).

5. The tool locking device according to claim 4, characterized in that: The second stopper (6) comprises a second threaded fastener; the diameter of the second threaded fastener is greater than the diameter of the first threaded fastener.

6. The tool locking device according to claim 5, characterized in that: The elastic body (4) comprises a disc spring.

7. The tool locking device according to any one of claims 1 to 6, characterized in that: A groove is provided on the circumferential side of the clamping shaft (2) into which part of the connecting screw sleeve (1) can be embedded; a partial surface of the groove is the second driving surface, and the remaining surface of the groove is separated from the connecting screw sleeve (1).

8. The tool locking device according to claim 7, characterized in that: The first driving surface and the second driving surface are both planes.

9. The tool locking device according to claim 7, characterized in that: The connecting screw sleeve (1) and the pressing shaft (2) are perpendicular to each other.

10. A cutting tool, characterized in that: It comprises a tool head, a tool handle (01) and a tool locking device as claimed in any one of claims 1 to 9; the tool handle (01) is provided with a first mounting hole and a second mounting hole, the connecting nut (1) is inserted into and fixed in the first mounting hole, the clamping shaft (2), the adjusting member (3) and the elastomer (4) are all installed in the second mounting hole; the tool head is fixed to the connecting nut (1).

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