Anti-loosening threaded connection type cutter

Abstract

An anti-loosening threaded connection type cutter comprises a cutter head, a cutter handle and an elastic ring, a screw rod is arranged at the rear end of the cutter head, a convex ring is arranged on the side face of the cutter head, a groove and a screw hole are formed in the front end of the cutter handle, the screw rod penetrates through the elastic ring and is in threaded connection with the screw hole, the length of the groove is smaller than that of the elastic ring, and the convex ring is arranged on the side face of the cutter head. The diameter of the groove is larger than that of the screw hole, the convex ring extrudes the elastic ring in the axial direction to enable the elastic ring to deform in the radial direction, the outer side face of the elastic ring is in interference fit with the inner side face of the groove, and the inner side face of the elastic ring is in interference fit with the screw rod. By means of the structural design, the tool bit and the tool handle can be matched more tightly, and the fastening degree of the tool bit and the tool handle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to milling and rotary cutting tool technical field, especially to a kind of thread connection type tool of anti-loosening. BACKGROUND

[0002] At present, the types of lathe tool are various, and the existing tool is generally screwed by screw to connect the split cutter head and handle, for example, the utility model CN216151722U discloses a connecting structure of tool and handle, which can avoid material waste and facilitate replacement of worn cutter head compared with the traditional welding method.

[0003] However, the cutter head and handle are prone to looseness during use of the existing tool, which is caused by insufficient production and processing precision of each accessory of lathe tool. To ensure that the production and processing of each accessory of lathe tool achieve very high precision and realize close cooperation between accessories, the production cost of manufacturers will be greatly increased. UTILITY MODEL CONTENT

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims to design a thread connection type tool with anti-loosening function, which can avoid looseness even after long-term use.

[0005] To achieve the above-mentioned purpose, the utility model provides a thread connection type tool with anti-loosening function, which comprises a cutter head and a handle, and further comprises an elastic ring. The rear end of the cutter head is provided with a screw rod, the side surface of the cutter head is provided with a convex ring, the front end of the handle is provided with a groove and a screw hole, the screw rod passes through the elastic ring and is screwed with the screw hole, the length of the groove is less than the length of the elastic ring, the diameter of the groove is greater than the diameter of the screw hole, the convex ring extrudes the elastic ring along the axial direction to make the elastic ring deform along the radial direction, the outer side surface of the elastic ring is interference-fitted with the inner side surface of the groove, and the inner side surface of the elastic ring is interference-fitted with the screw rod.

[0006] Further, the elastic ring is in the shape of a circular ring column, the groove is in the shape of a circular cylindrical groove, and the diameter of the groove is greater than the outer diameter of the elastic ring.

[0007] Further, the screw rod is provided with a mandrel and a threaded end, the mandrel is located between the convex ring and the threaded end, the threaded end is screwed with the screw hole, and the mandrel passes through the elastic ring.

[0008] Further, the elastic ring is a metal piece.

[0009] Further, the diameter of the threaded end gradually decreases from front to back.

[0010] Further, the outer diameter of the convex ring is larger than the diameter of the groove.

[0011] Further, the tool head is provided with a wrench site for being clamped by a wrench, and the wrench site is located at the front end of the convex ring.

[0012] Further, the tool head is a machine clamped tool head.

[0013] Further, the tool head is a machine clamped tool head.

[0014] Further, the tool head is a machine clamped tool head.

[0015] After the above technical scheme is adopted, the beneficial effects are: the rear end of the tool head penetrates through the elastic ring and is engaged with the tool handle and forms a positioning cavity, the elastic ring is arranged in the positioning cavity and is subjected to axial extrusion force so as to be deformed radially, so that the outer side surface of the elastic ring is in interference fit with the groove to realize radial fastening, the inner side surface of the elastic ring is in interference fit with the fastening part of the tool head to realize radial fastening, because the elastic ring is extruded in the closed space of the groove, under the counteracting tension of the elastic ring, the rear end of the tool head and the front end of the tool handle form uniform extrusion force, so that the cooperation with the tool handle is more compact, thereby improving the fastening degree of the tool head and the tool handle. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an exploded view of the tool;

[0017] Figure 2 It is a left view of the tool;

[0018] The reference signs are: 1, tool head; 2, elastic ring; 3, tool handle; 4, through hole; 5, positioning cavity; 6, screw hole; 7, groove; 8, convex ring; 9, screw rod; 10, mandrel; 11, threaded end; 12, wrench site; 13, blade; 14, chip removal groove. DETAILED DESCRIPTION

[0019] As Figure 1As shown, this utility model provides a threaded connection cutter with anti-loosening features, including: a cutter head 1 and a cutter shank 3, and also including: an elastic ring 2. The cutter head 1 has a screw 9 at its rear end and a convex ring 8 on its side. The cutter shank 3 has a groove 7 and a screw hole 6 at its front end. The screw 9 passes through the elastic ring 2 and is screwed into the screw hole 6. The length of the groove 7 is less than the length of the elastic ring 2, and the diameter of the groove 7 is greater than the diameter of the screw hole 6. The convex ring 8 compresses the elastic ring 2 axially, causing the elastic ring 2 to deform radially. The outer side of the elastic ring 2 is interference-fitted with the inner side of the groove 7, and the inner side of the elastic ring 2 is interference-fitted with the screw. While screwing avoids material waste and facilitates replacement of worn cutting heads compared to traditional welding, it can easily lead to loosening of the fit between parts. In this invention, the convex ring 8, screw 9, and groove 7 together form a positioning cavity 5 to accommodate the elastic ring 2. When the screw 9 is screwed into the screw hole 6, the convex ring 8 compresses the elastic ring 2 axially. The elastic ring 2 is compressed radially within the sealed space of the positioning cavity 5. The reaction tension generated by the elastic ring 2 acts evenly between the cutting head 1 and the tool holder 3, achieving radial fastening for both. This results in a tighter fit between the cutting head 1 and the tool holder 3, solving the problem of insufficient precision in the manufacturing process of existing split-type cutting tools, which makes the cutting head and tool holder prone to loosening. The length of the positioning cavity 5 is less than the length of the elastic ring 2 so that the elastic ring 2 can protrude from the surface of the tool holder 3, facilitating axial compression by the convex ring 8.

[0020] In this embodiment, the elastic ring 2 is in the shape of a cylindrical ring, and the groove 7 is in the shape of a cylindrical groove, with the diameter of the groove 7 being larger than the outer diameter of the elastic ring 2. The cylindrical elastic ring 2 has a through hole 4 in its center. When the rear end of the cutter head 1 passes through the through hole 4 of the cylindrical elastic ring 2 and is screwed onto the cutter shank 3, the elastic ring 2 is axially compressed and deformed within the positioning cavity 5, radially filling the entire positioning cavity 5 and thus pressing the cutter shank 3, preventing the cutter head 1 and the cutter shank 3 from easily loosening. The cylindrical elastic ring 2 of this embodiment can apply a uniform compressive force to the cutter head 1 and the cutter shank 3, making it less likely for the relative positions of the cutter head 1 and the cutter shank 3 to deviate, thereby improving the coaxiality between the cutter head 1 and the cutter shank 3.

[0021] like Figure 2 As shown, in this embodiment, the screw 9 is provided with a spindle 10 and a threaded end 11. The spindle 10 is located between the convex ring 8 and the threaded end 11, and the threaded end 11 is screwed into the threaded hole 6. The spindle 10 passes through the elastic ring 2. When the rear end of the cutter head 1 passes through the through hole 4 of the elastic ring 2 and is screwed into the cutter shank 3, the outer surface of the elastic ring 2 and the inner surface of the groove 7 are interference-fitted to achieve radial fastening, and the inner surface of the elastic ring 2 and the spindle 10 are interference-fitted to achieve radial fastening, thereby improving the fastening degree between the cutter head 1 and the cutter shank 3.

[0022] Preferably, the elastic ring 2 is made of metal. In order to ensure the strength of the product, the elastic ring 2 is made of metal. Since the hardness of metal is relatively large, it is not easy to elastically deform. Therefore, in order to ensure that the elastic ring 2 can be placed in the positioning cavity 5, when the elastic ring 2 in the positioning cavity 5 is extruded, it will slightly expand and generate a tensioning force acting on the inner wall of the shank 3, so that the cooperation between the elastic ring 2 and the shank 3 is more closely and is not easy to loosen. The elastic ring 2 in the embodiment is made of metal, and in other embodiments, the material of the elastic ring 2 can also be rubber.

[0023] Preferably, the diameter of the threaded end 11 gradually decreases from front to back. When the tool bit 1 is screwed with the threaded hole 6 of the shank 3 through the threaded end 11 at the rear end, since the threaded end 11 has a taper, the diameter of the threaded end 1 gradually decreases from front to back, the threaded hole 6 and the threaded end 11 are interference fit to achieve axial fastening, which is not easy to loosen during use, thereby prolonging the service life of the product.

[0024] Preferably, the outer diameter of the convex ring 8 is greater than the diameter of the groove 7. Since the convex ring 8 completely covers the groove 7, that is, the convex ring 8 also completely covers the elastic ring 2, the elastic ring 2 can be uniformly extruded by the axial extrusion force of the convex ring 8, and the elastic ring 2 generates uniform radial deformation, which is beneficial to the interference fit between the elastic ring 2 and the groove 7 and the mandrel 10 to achieve radial fastening, thereby improving the fastening degree between the tool bit 1 and the shank 3.

[0025] Preferably, the tool bit 1 is provided with a wrench position 12 for being clamped by a wrench, and the wrench position 12 is located at the front end of the convex ring 8. Since the fastening degree of the connection between the tool bit 1 and the shank 3 is very high, the interference fit between the screw rod 9 and the threaded hole 6 usually needs to be assisted by a wrench. The wrench position 12 facilitates the user to use the wrench to clamp the tool bit 1 to rotate into the shank 3, thereby achieving the fastening of the tool bit 1 and the shank 3.

[0026] In the embodiment, the tool bit 1 is a machine clamped tool bit, and a plurality of blades 13 are fixed on the front end of the tool bit 1 by screws. A plurality of chip flutes 14 corresponding to the blades 13 extend from the front end surface of the tool bit 1 to the rear of the blades 13. The plurality of blades 13 of the machine clamped tool bit can be individually disassembled and replaced, thereby reducing the cost. In other embodiments, the tool bit 1 can also be an integrated tool bit, which is used in application scenarios with high hardness and cutting stability of the tool bit, and the integrated tool bit can be adjusted according to different application scenarios.

Claims

1. A locking threaded tool comprising: The tool head and tool handle are characterized in that further comprising: a resilient ring, the rear end of the tool head is provided with a screw rod, the lateral surface of the tool head is provided with a convex ring, the front end of the tool handle is provided with a recess and a screw hole, the screw rod passes through the resilient ring and is screwed with the screw hole, the length of the recess is less than the length of the resilient ring, the diameter of the recess is greater than the diameter of the screw hole, the convex ring extrudes the resilient ring along the axial direction so that the resilient ring deforms along the radial direction, the outer lateral surface of the resilient ring is interference fit with the inner lateral surface of the recess, and the inner lateral surface of the resilient ring is interference fit with the screw rod.

2. The anti-loosening threaded connection type tool according to claim 1, wherein The resilient ring is a circular cylindrical shape, the recess is a cylindrical groove shape, and the diameter of the recess is greater than the outer diameter of the resilient ring.

3. The anti-loosening threaded connection type tool according to claim 2, wherein The screw rod is provided with a mandrel and a threaded end, the mandrel is located between the convex ring and the threaded end, the threaded end is screwed with the screw hole, and the mandrel passes through the resilient ring.

4. The anti-loosening threaded connection type tool according to claim 2, wherein The resilient ring is a metal piece.

5. The anti-loosening threaded connection type tool according to claim 3, wherein The threaded end gradually decreases in diameter from front to back.

6. The anti-loosening threaded connection type tool according to claim 1, wherein The outer diameter of the convex ring is greater than the diameter of the recess.

7. The anti-loosening threaded connection type tool according to claim 1, wherein The tool head is provided with a wrench site for being clamped by a wrench, and the wrench site is located at the front end of the convex ring.

8. The anti-loosening threaded connection type tool according to claim 1, wherein The tool head is a machine clamped tool head.

9. The anti-loosening threaded connection type tool according to claim 8, wherein A plurality of blades are fixed on the front end of the tool head by screws, a plurality of chip grooves corresponding to the blades are arranged, and the chip grooves extend from the front end surface of the tool head to the rear of the blades.

10. The anti-loosening threaded connection type tool according to claim 1, wherein The tool head is an integrated tool head.

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