A cutter with automatic limiting function

Abstract

The utility model relates to machine tool equipment technical field discloses a tool with automatic limiting function, including: tool holder, the side fixed mounting of tool holder has handle, handle sliding connection has sliding sleeve, guide structure sets up between handle and sliding sleeve for the sliding stroke of handle is limited, adjusting structure sets up in sliding sleeve inside for adjusting the sliding resistance of handle, adjusting structure includes first spring, first adjusting screw rod and second spring, the end fixed mounting first spring and second spring of handle, first adjusting screw rod is connected with sliding sleeve thread, through rotating first adjusting screw rod, end extrusion first spring adjusts the compression degree of first spring, cooperation compressible second spring, realize multistage adjustment, the axial force range of handle provided is wider, cooling lubrication channel structure, the sealing ring sets up between handle and second adjusting screw rod, forms the cooling lubrication channel of sealing, lets the tool inside cooling lubrication to play the role.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, and in particular to a cutting tool with automatic limit function. Background Technology

[0002] A search revealed a prior art tool clamping device for automatically limiting machining depth (Publication No.: CN113547360B), comprising a clamping shank diameter, a spring connecting sleeve, a spring ring, an external threaded sleeve, a nut, a bearing, a fixing sleeve, a limiting block, and a side-fixed tool. The external threaded sleeve is engaged with the clamping shank diameter, the spring connecting sleeve movably connects the clamping shank diameter and the external threaded sleeve, the spring ring is located between the clamping shank diameter and the external threaded sleeve and is located inside the spring connecting sleeve, the open end of the external threaded sleeve has a protrusion, the bearing is sleeved on the external threaded sleeve, the nut is threaded to the outer side wall of the external threaded sleeve, the fixing sleeve is engaged with the outer side wall of the bearing, the side-fixed tool is fixedly clamped inside the external threaded sleeve, and the limiting block is located at the end of the fixing sleeve. Several sets of fixed blocks are evenly distributed on the outer side of the clamping groove 2. The clamping shank is connected to the spindle of the machine tool. The rotation of the spindle drives the clamping shank to rotate. Because the concave and convex parts 1 and 2 slide and engage, the rotation of the clamping shank will drive the external threaded sleeve to rotate, which in turn drives the side-fixed tool to rotate and process the product. When the set processing depth is reached, the machine tool spindle cannot stop in time to approach the product. At this time, the limiting block will press against the product surface. Because the fixed sleeve and the clamping shank are connected by a bearing, when the limiting block presses against the product, the side-fixed tool can continue to rotate. At the same time, under the action of the reaction force, the fixed sleeve drives the external threaded sleeve to move in the direction of the clamping shank, compressing the spring ring and providing the buffer space required for the machine tool control response time. Thus, the depth dimension of products with different deformation amounts can be kept consistent after processing.

[0003] The aforementioned patent has the following drawbacks: its structure is complex and requires multiple parts to be threaded together for installation, making operation cumbersome; the external threaded sleeve and the internal structure of the clamping shank lack cooling and lubrication channels; and it mainly relies on the elastic force provided by the spring as the radial support of the tool holder. However, the radial support force of the tool holder acts on the tool and the workpiece. When dealing with tools or workpieces with large radial force requirements, the elastic force of the spring is insufficient to support the tool entering the workpiece, which will affect the machining of the workpiece. Therefore, it is impossible to use tools with internal cooling and lubrication. Adjusting the elastic force provided by the spring to cope with the radial force requirements of different tools is a pain point of the existing technology and has room for optimization.

[0004] Therefore, we propose a cutting tool with automatic limit function. Utility Model Content

[0005] The present invention mainly solves the technical problem that the radial support force provided by the spring to the tool holder is fixed and cannot be adjusted, and provides a tool with an automatic limit function.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a cutting tool with an automatic limiting function, comprising:

[0007] A tool holder, with a tool handle fixedly mounted on one side of the tool holder, and the tool handle being slidably connected to a sliding sleeve;

[0008] A guide structure is provided between the tool holder and the sliding sleeve to limit the sliding stroke of the tool holder;

[0009] An adjustment structure is provided inside the sliding sleeve to adjust the sliding resistance of the tool holder. The adjustment structure includes a first spring, a first adjusting screw, and a second spring. The first spring and the second spring are fixedly installed at the end of the tool holder. The first adjusting screw is threadedly connected to the sliding sleeve and can adjust the compression amplitude of the first spring and the second spring.

[0010] The cooling and lubrication channel structure has a sealing ring on one side of the tool holder, and the sealing ring is slidably connected to a second adjusting screw.

[0011] In a preferred embodiment of this utility model, a cavity is formed inside the sliding sleeve, the tool handle is adapted to the sliding sleeve, and the tool handle is slidably disposed within the cavity of the sliding sleeve.

[0012] In a preferred embodiment of this utility model, the guide structure includes a guide groove and a steel ball. The sliding sleeve has a guide groove, the tool holder has a ball socket, and the steel ball is disposed in the ball socket of the tool holder and can roll within the guide groove.

[0013] In a preferred embodiment of this utility model, the guide groove is formed into a rectangular groove, the ball socket is formed into a hemispherical groove, the steel ball is a sphere, the diameter of the steel ball is equal to the width of the guide groove, the diameter of the steel ball is equal to the diameter of the hemispherical groove, and a protective sleeve is installed on the outside of the sliding sleeve, which can cover the guide groove and the steel ball.

[0014] In a preferred embodiment of this utility model, the inner wall of the sliding sleeve is threaded, the first adjusting screw is threaded to the inner wall of the sliding sleeve, and the ends of the first adjusting screw and the knife handle are both provided with annular grooves. The first adjusting screw and the second spring form a cylindrical boss through the annular groove, and the two ends of the first spring are sleeved on the boss.

[0015] In a preferred embodiment of this utility model, the adjustment structure further includes an abutment plate and a second adjustment screw, the second adjustment screw being threadedly connected to the first adjustment screw, and the abutment plate being rotatably connected to the second adjustment screw, wherein the abutment plate can compress the second spring to deform.

[0016] In a preferred embodiment of this utility model, a threaded hole adapted to the second adjusting screw is provided at the center of the end of the first adjusting screw, and an abutment plate is rotatably connected to the end of the second adjusting screw. The abutment plate is a circular plate, and the diameter of the abutment plate is larger than the diameter of the second spring.

[0017] In a preferred embodiment of this utility model, the cooling and lubrication channel structure includes a tool holder, a sealing ring, and a second adjusting screw. The tool holder has an annular groove and a tool holder channel. The sealing ring is disposed in the annular groove, and the inner diameter of the sealing ring is equal to the diameter of the annular groove. The second adjusting screw has a screw channel, and the outer diameter of the sealing ring is equal to the diameter of the screw channel of the second adjusting screw.

[0018] This utility model provides a cutting tool with an automatic limit function. It has the following beneficial effects:

[0019] 1. This tool with automatic limit function can adjust the compression degree of the first spring by rotating the first adjusting screw and squeezing the end of the first adjusting screw to make the resistance of the tool holder sliding in the sliding sleeve adjustable. It can meet the needs of different tools that require different radial forces to smoothly enter the workpiece and has flexible adjustability. With the help of the compressible second spring, multi-stage adjustment can be realized, and the radial force provided to the tool holder covers a wider range.

[0020] 2. This cutting tool with automatic limiting function uses mutually compatible guide grooves and steel balls. The steel balls roll in the guide grooves to guide the tool holder, ensuring the stability of the sliding process and preventing the tool holder from rotating or twisting. Secondly, the guide grooves of limited length limit the rolling range of the steel balls, preventing the tool holder from entering the sliding sleeve too much and damaging the first and second springs.

[0021] 3. This cutting tool with automatic limit function, by setting a second adjusting screw, has hexagonal holes at the ends of both the first and second adjusting screws. By rotating the second adjusting screw with a hexagonal wrench, the second adjusting screw drives the contact plate closer to the second spring. When the tool holder slides and compresses the first spring, the elastic force provided by the first spring is insufficient to allow the tool to enter the workpiece. By rotating the second adjusting screw, the second spring and the first spring can jointly provide a pushing force to the tool holder, which can meet the needs of using tools with large radial forces. It realizes multi-stage adjustment of the radial force provided by the tool holder. The structure is simple, the operation is convenient, and it is easy to use.

[0022] 4. This cutting tool with automatic limiting function, through the mutually compatible diameters of the annular groove of the tool holder, the diameter of the tool holder channel, the sealing ring, and the diameter of the second adjusting screw channel, when the tool holder slides inside the second adjusting screw, forms a sealed cooling and lubrication channel structure through the tool holder channel and the second adjusting screw channel. Attached Figure Description

[0023] Figure 1 This is one of the overall perspective views of this utility model;

[0024] Figure 2 This is the second overall perspective view of the present utility model;

[0025] Figure 3 This is a perspective view of the tool holder and slide sleeve of this utility model;

[0026] Figure 4 This is a partial sectional view of the sliding sleeve of this utility model;

[0027] Figure 5 This is a partial view of the sealing ring of this utility model.

[0028] Figure 6 This is a partial view of the annular groove and the tool holder channel of this utility model.

[0029] Legend: 10. Tool holder; 11. Tool shank; 12. Sliding sleeve; 13. Protective sleeve; 14. Guide groove; 15. Steel ball; 16. Sealing ring; 17. Ball socket; 18. Annular groove; 19. Tool shank channel; 20. First spring; 21. First adjusting screw; 22. Second spring; 23. Contact plate; 24. Second adjusting screw; Screw channel 25. Detailed Implementation

[0030] A cutting tool with automatic limit function, such as Figure 1 , Figure 2 and Figure 4 As shown, it includes:

[0031] A tool holder 10 is provided, and a tool handle 11 is fixedly installed on one side of the tool holder 10. The tool handle 11 is slidably connected to a sliding sleeve 12.

[0032] An adjustment structure is provided inside the sliding sleeve 12 to adjust the sliding resistance of the tool handle 11. The adjustment structure includes a first spring 20, a first adjusting screw 21, and a second spring 22. The first spring 20 and the second spring 22 are fixedly installed at the end of the tool handle 11. The first adjusting screw 21 is threadedly connected to the sliding sleeve 12. The first adjusting screw 21 can adjust the compression amplitude of the first spring 20 and the second spring 22. A cavity is formed inside the sliding sleeve 12. The tool handle 11 is adapted to the sliding sleeve 12 and is slidably disposed in the cavity of the sliding sleeve 12. The inner wall of the sliding sleeve 12 is threaded. The first adjusting screw 21 is threadedly connected to the inner wall of the sliding sleeve 12. Both the end of the first adjusting screw 21 and the end of the tool handle 11 are provided with annular grooves. The first adjusting screw 21 and the second spring 22 form a cylindrical boss through the annular grooves. The two ends of the first spring 20 are sleeved on the boss.

[0033] In this design, the first spring 20 is longer than the second spring 22, which is a tower-shaped spring. By rotating the first adjusting screw 21, the end of the first adjusting screw 21 is used to squeeze the first spring 20 to adjust the compression degree of the first spring 20. As a result, the resistance of the tool holder 11 sliding in the sliding sleeve 12 can be adjusted to meet the needs of different tools requiring different radial forces to smoothly enter the workpiece. It has flexible adjustability. In conjunction with the compressible second spring 22, multi-stage adjustment can be achieved, and the radial force provided to the tool holder 11 covers a wider range.

[0034] like Figure 2 and Figure 3 As shown, a guide structure is provided between the tool holder 11 and the sliding sleeve 12 to limit the sliding stroke of the tool holder 11;

[0035] The guiding structure includes a guide groove 14 and a steel ball 15. The guide groove 14 is formed in the sliding sleeve 12, and the ball socket 17 is formed in the tool holder 11. The steel ball 15 is disposed in the ball socket 17 of the tool holder 11 and can roll in the guide groove 14. The guide groove 14 forms a rectangular groove, and the ball socket 17 forms a hemispherical groove. The steel ball 15 is a sphere, and the diameter of the steel ball 15 is equal to the width of the guide groove 14 and the diameter of the hemispherical groove. A protective sleeve 13 is installed on the outside of the sliding sleeve 12, which can cover the guide groove 14 and the steel ball 15.

[0036] Through the mutually compatible guide groove 14 and steel ball 15, the steel ball 15 rolls in the guide groove 14, which can guide the tool holder 11 and ensure the stability of the sliding process, so that the tool holder 11 will not rotate or twist. Secondly, the guide groove 14 with limited length limits the rolling range of the steel ball 15, so as to prevent the tool holder 11 from entering the sliding sleeve 12 too much and damaging the first spring 20 and the second spring 22.

[0037] like Figure 4 As shown, the adjustment structure also includes a contact plate 23 and a second adjustment screw 24. The second adjustment screw 24 is threadedly connected to the first adjustment screw 21, and the contact plate 23 is rotatably connected to the second adjustment screw 24. The contact plate 23 can compress the second spring 22 to deform. A threaded hole adapted to the second adjustment screw 24 is opened at the center of the end of the first adjustment screw 21. The contact plate 23 is rotatably connected to the end of the second adjustment screw 24. The contact plate 23 is a circular plate, and the diameter of the contact plate 23 is larger than the diameter of the second spring 22.

[0038] like Figure 4 , Figure 5 and Figure 6 As shown, a cooling and lubrication channel structure is set between the tool holder 11, the sealing ring 16, and the second adjusting screw 24 for the formation of the cooling and lubrication channel.

[0039] With the mutually compatible diameters of the annular groove 18 of the tool holder 11, the tool holder channel 19, the sealing ring 16, and the screw channel 25 of the second adjusting screw 24, when the tool holder 11 slides inside the second adjusting screw 24, a sealed cooling and lubrication channel structure is formed through the tool holder channel 19 of the tool holder 11 and the screw channel 25 of the second adjusting screw 24.

[0040] As a further explanation of the above solution, by setting a second adjusting screw 24, and both the ends of the first adjusting screw 21 and the second adjusting screw 24 are provided with hexagonal holes, the second adjusting screw 24 is rotated with a hexagonal wrench. The second adjusting screw 24 drives the contact plate 23 to approach the second spring 22. When the tool holder 11 slides and squeezes the first spring 20, the elastic force provided by the first spring 20 is insufficient to allow the tool to enter the workpiece. By rotating the second adjusting screw 24, the second spring 22 and the first spring 20 can jointly provide a pushing force to the tool holder 11, which can meet the needs of using tools with large radial forces. This achieves multi-stage adjustment of the radial force provided to the tool holder 11. The structure is simple, the operation is convenient, and it is easy to use.

[0041] The working principle of this utility model is as follows: Rotating the first adjusting screw 21 compresses the first spring 20 by pressing its end. Using a hex wrench, rotating the second adjusting screw 24 causes the contact plate 23 to move closer to the second spring 22. When the tool holder 11 slides and compresses the first spring 20, the elastic force provided by the first spring 20 is insufficient to allow the tool to enter the workpiece. Rotating the second adjusting screw 24 allows the second spring 22 and the first spring 20 to jointly provide thrust to the tool holder 11, meeting the requirements for using tools with large radial forces. This is achieved through mutually compatible guide grooves 14 and steel balls 15. 5. Rolling within the guide groove 14 guides the tool holder 11, ensuring stability during the sliding process and preventing rotational twisting of the tool holder 11. The limited length of the guide groove 14 restricts the rolling range of the steel ball 15, preventing the tool holder 11 from entering the sliding sleeve too much and damaging the first spring 20 and the second spring 22. Through the mutually compatible diameters of the annular groove 18 of the tool holder 11, the tool holder channel 19, the sealing ring 16, and the screw channel 25 of the second adjusting screw 24, when the tool holder 11 slides inside the second adjusting screw 24, a sealed cooling and lubrication channel structure is formed through the tool holder channel 19 of the tool holder 11 and the screw channel 25 of the second adjusting screw 24.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cutting tool with an automatic limit function, characterized in that, include: A tool holder (10) is provided, with a tool handle (11) fixedly mounted on one side. The tool handle (11) is slidably connected to a sliding sleeve (12). A guide structure is provided between the tool handle (11) and the sliding sleeve (12) to limit the sliding stroke of the tool handle (11). An adjustment structure is provided inside the sliding sleeve (12) to adjust the sliding resistance of the tool handle (11). The adjustment structure includes a first spring (20), a first adjusting screw (21), and a second spring (22). The first spring (20) and the second spring (22) are fixedly mounted at the end of the tool handle (11). The first adjusting screw (21) is threadedly connected to the sliding sleeve (12). The first adjusting screw (21) can adjust the compression amplitude of the first spring (20) and the second spring (22). A cooling and lubrication channel structure is provided between the tool handle (11) and the second adjusting screw (24) to form a cooling and lubrication channel.

2. The cutting tool with automatic limit function according to claim 1, characterized in that: The sliding sleeve (12) forms a cavity inside, and the knife handle (11) is adapted to the sliding sleeve (12). The knife handle (11) is slidably disposed in the cavity of the sliding sleeve (12).

3. The cutting tool with automatic limit function according to claim 1, characterized in that: The guiding structure includes a guide groove (14) and a steel ball (15). The sliding sleeve (12) has a guide groove (14), and the tool holder (11) has a ball socket (17). The steel ball (15) is placed in the ball socket (17) of the tool holder (11) and can roll in the guide groove (14).

4. The cutting tool with automatic limit function according to claim 3, characterized in that: The guide groove (14) forms a rectangular groove, the ball socket (17) forms a hemispherical groove, the steel ball (15) is a sphere, the diameter of the steel ball (15) is equal to the width of the guide groove (14), the diameter of the steel ball (15) is equal to the diameter of the ball socket (17), and a protective sleeve (13) is installed on the outside of the sliding sleeve (12), which can cover the guide groove (14) and the steel ball (15).

5. The cutting tool with automatic limit function according to claim 1, characterized in that: The inner wall of the sliding sleeve (12) is threaded, and the first adjusting screw (21) is threaded to the inner wall of the sliding sleeve (12). The ends of the first adjusting screw (21) and the knife handle (11) are both provided with annular grooves. The first adjusting screw (21) and the second spring (22) form a cylindrical boss through the annular groove, and the two ends of the first spring (20) are sleeved on the boss.

6. The cutting tool with automatic limit function according to claim 1, characterized in that: The adjustment structure also includes a contact plate (23) and a second adjustment screw (24). The second adjustment screw (24) is threadedly connected to the first adjustment screw (21), and the contact plate (23) is rotatably connected to the second adjustment screw (24). The contact plate (23) can compress the second spring (22) to deform.

7. The cutting tool with automatic limit function according to claim 6, characterized in that: The first adjusting screw (21) has a threaded hole at the center of its end that is adapted to the second adjusting screw (24). The abutment plate (23) is rotatably connected to the end of the second adjusting screw (24). The abutment plate (23) is a round plate and its diameter is larger than that of the second spring (22).

8. The cutting tool with automatic limit function according to claim 1, characterized in that: The cooling and lubrication channel structure includes an annular groove (18) of the tool holder (11), a tool holder channel (19), a sealing ring (16), and a screw channel (25) of the second adjusting screw (24). The tool holder (11) is slidably connected to the second adjusting screw (24).

9. The cutting tool with automatic limit function according to claim 8, characterized in that: With the mutually compatible diameters of the annular groove (18) of the tool holder (11), the diameter of the tool holder channel (19), the sealing ring (16), and the diameter of the screw channel (25) of the second adjusting screw (24), the sealing ring (16) can seal the tool holder (11) and the second adjusting screw (24) when the tool holder (11) slides inside the second adjusting screw (24).

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