Reamer with locking mechanism

Abstract

This invention relates to the field of hole reaming technology, specifically a hole reamer with a locking mechanism. It includes a shank, with multiple cross-shaped locking grooves arranged in a circular array on the lower side wall of the shank. A hole reaming assembly is mounted on the shank, comprising an upper cutting disc and a lower cutting disc, with the shank passing through both. The hole reaming assembly of this invention, through the rotation of an adjusting disc and the arrangement of a V-shaped guide groove and a rotating ring, allows the cross-shaped locking rod to be inserted into the corresponding cross-shaped locking groove on the shank, thus locking the hole reaming assembly. Operation is simple. Furthermore, while the adjusting disc rotates, the meshing of the driving gear and the driven gear synchronously drives the trapezoidal blade to rotate and extend. The hole diameter of the hole reaming assembly can be flexibly adjusted according to the rotation angle of the trapezoidal blade and the required hole diameter determined by a pointer and angle gauge. The double-edged design of the trapezoidal blade facilitates blade switching and increases the service life of the trapezoidal blade.

Description

Technical Field

[0001] This invention relates to the field of hole reaming technology, specifically a hole reamer with a locking mechanism. Background Technology

[0002] Before using a machine tool to perform hole enlargement, the workpiece must first be drilled. At the same time, a reamer is used to enlarge the hole. The reamer is essentially a larger reamer drill bit used to enlarge the existing hole.

[0003] Currently, when performing hole reaming operations, it is necessary to change to different specifications of reaming cutters according to the required hole diameter, which makes it impossible to adjust the hole diameter, resulting in a lack of practicality and flexibility. Furthermore, the disassembly and assembly of the reaming cutter and the shank are cumbersome, lacking a convenient locking structure. In addition, most current reaming cutters adopt a single-edged blade design, and the replacement of the blade after damage is cumbersome. In order to solve the above-mentioned problems, this invention proposes a reaming cutter with a locking mechanism. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a reamer with a locking mechanism.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a reaming tool with a locking mechanism, including a tool handle, a plurality of cross locking grooves arranged in a circular array on the lower side wall of the tool handle, a reaming assembly provided on the tool handle, the reaming assembly including an upper cutting disc and a lower cutting disc, and the tool handle passing through the upper cutting disc and the lower cutting disc, a plurality of cross moving grooves arranged in a circular array on the inner groove wall of the lower cutting disc, a plurality of trapezoidal blades arranged in a circular array between the upper cutting disc and the lower cutting disc, the upper and lower ends of the trapezoidal blades being rotatably connected to the upper cutting disc and the lower cutting disc through shafts, the two symmetrical inclined sides of the trapezoidal blades being provided with cutting edges, and a driven gear being fixedly connected to the shaft at the lower end of the trapezoidal blades;

[0006] The hole enlarging assembly also includes an adjusting plate that is rotatably connected to the internal groove of the lower cutter head, and a through groove for the tool holder to pass through is provided at the center of the adjusting plate. The upper outer edge of the adjusting plate is provided with a driving gear, and the driving gear is meshed with the driven gear. Multiple V-shaped guide grooves are arranged in a circular array on the adjusting plate, and a worm gear is provided at the lower end of the adjusting plate.

[0007] The hole enlarging assembly also includes a cross locking rod correspondingly arranged on the cross moving groove. One end of the cross locking rod is respectively arranged corresponding to the cross locking groove, and the lower end of the cross locking rod is rotatably connected to a guide wheel through a shaft. The guide wheel is correspondingly arranged on the V-shaped guide groove.

[0008] The hole enlarging assembly also includes an adjusting locking rod located at the lower end of the adjusting disc, and the adjusting locking rod is provided with a worm gear part that meshes with the worm wheel part.

[0009] Specifically, a first rotating groove is provided at the center of the internal groove of the lower cutter disc, and a rotating ring is provided at the lower end of the worm gear, and the rotating ring and the first rotating groove are connected by a bearing.

[0010] Specifically, the shaft at the upper end of one of the trapezoidal blades passes through the upper cutter disc, and a pointer is fixedly connected to the end of the shaft. An angle ruler is provided at the position corresponding to the pointer on the upper cutter disc, and the angle ruler is provided with a length mark corresponding to the enlarged hole diameter.

[0011] Specifically, the lower cutter head has an adjustment groove on its side wall, the adjustment locking rod passes through the inner groove wall of the lower cutter head, and the end of the adjustment locking rod is connected to a cross nut located in the adjustment groove.

[0012] Specifically, a limiting block located on the upper cutter disc is fixedly connected to the tool holder, and a locking nut for locking the lower cutter disc is threaded to the lower end of the tool holder.

[0013] Specifically, the inner wall of the lower cutter disc is provided with a plurality of second rotating grooves arranged in a circular array, and the driven gear is correspondingly arranged in the second rotating groove.

[0014] The beneficial effects of this invention are as follows: The hole-reaming assembly used in this invention, through the rotation of the adjusting disc and the setting of the V-shaped guide groove and rotating ring, enables the cross locking rod to be inserted into the cross locking groove on the tool holder to lock the hole-reaming assembly, making operation simple; and while the adjusting disc rotates, the meshing of the driving gear and the driven gear synchronously drives the trapezoidal blade to rotate and extend, allowing for flexible adjustment of the hole diameter of the hole-reaming assembly according to the rotation angle of the trapezoidal blade and the required hole diameter positioned by the pointer and angle ruler; and the double-edged design of the trapezoidal blade facilitates blade switching and increases the service life of the trapezoidal blade. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 A schematic diagram of a reamer with a locking mechanism provided by the present invention;

[0017] Figure 2 A schematic diagram showing the disassembled structure of a reamer with a locking mechanism provided by the present invention;

[0018] Figure 3 A cross-sectional view of a reamer with a locking mechanism provided by the present invention. Figure 1 ;

[0019] Figure 4 A cross-sectional view of a reamer with a locking mechanism provided by the present invention. Figure 2 ;

[0020] Figure 5 A schematic diagram of the lower cutting disc structure of a reamer with a locking mechanism provided by the present invention;

[0021] Figure 6 A schematic diagram of the disassembled lower blade structure of a reamer with a locking mechanism provided by the present invention;

[0022] Figure 7 A schematic diagram of the adjusting disc structure of a reamer with a locking mechanism provided by the present invention;

[0023] Figure 8 This is a schematic diagram of the structure of a reamer with a locking mechanism after the trapezoidal blade has been rotated and adjusted according to the present invention.

[0024] In the diagram: 1. Tool holder; 11. Cross locking groove; 12. Limiting block; 13. Locking nut; 2. Hole reaming assembly; 21. Upper tool disc; 211. Angle gauge; 22. Lower tool disc; 221. Cross moving groove; 222. First rotating groove; 223. Adjusting groove; 224. Second rotating groove; 23. Trapezoidal blade; 231. Blade; 232. Driven gear; 233. Pointer; 24. Adjusting disc; 241. Driving gear section; 242. V-shaped guide groove; 243. Worm gear section; 244. Rotating ring; 25. Cross locking rod; 251. Guide wheel; 26. Adjusting locking rod; 261. Worm gear section; 262. Cross nut. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0026] like Figures 1-8 As shown, a hole-reaming tool with a locking mechanism according to the present invention includes a handle 1. Multiple cross locking grooves 11 are arranged in a circular array on the lower side wall of the handle 1. A hole-reaming assembly 2 is provided on the handle 1. The hole-reaming assembly 2 includes an upper cutting disc 21 and a lower cutting disc 22. The handle 1 passes through the upper cutting disc 21 and the lower cutting disc 22. Multiple cross moving grooves 221 are arranged in a circular array on the inner wall of the lower cutting disc 22. Multiple trapezoidal blades 23 are arranged in a circular array between the upper cutting disc 21 and the lower cutting disc 22. The upper and lower ends of the trapezoidal blades 23 are rotatably connected to the upper cutting disc 21 and the lower cutting disc 22 through shafts. The two symmetrical inclined sides of the trapezoidal blades 23 are provided with cutting edges 231. A driven gear 232 is fixedly connected to the shaft at the lower end of the trapezoidal blades 23.

[0027] The hole enlarging assembly 2 also includes an adjusting disk 24 that is rotatably connected to the internal groove of the lower cutter disc 22. The center of the adjusting disk 24 is provided with a through groove for the tool holder 1 to pass through. The upper outer edge of the adjusting disk 24 is provided with a driving gear 241, and the driving gear 241 is meshed with the driven gear 232. Multiple V-shaped guide grooves 242 are arranged in a circular array on the adjusting disk 24. The lower end of the adjusting disk 24 is provided with a worm gear 243.

[0028] The enlarged hole assembly 2 also includes a cross locking rod 25 correspondingly provided on the cross moving groove 221. One end of the cross locking rod 25 is respectively provided corresponding to the cross locking groove 11, and the lower end of the cross locking rod 25 is rotatably connected to a guide wheel 251 through a shaft. The guide wheel 251 is correspondingly provided on the V-shaped guide groove 242.

[0029] The enlargement assembly 2 also includes an adjusting locking rod 26 located at the lower end of the adjusting plate 24, and the adjusting locking rod 26 is provided with a worm gear part 261 that meshes with the worm gear part 243.

[0030] Specifically, a first rotating groove 222 is provided at the center of the internal groove of the lower cutter disc 22, and a rotating ring 244 is provided at the lower end of the worm gear part 243. The rotating ring 244 and the first rotating groove 222 are connected by a bearing. Through the rotating connection between the rotating ring 244 and the first rotating groove 222, the adjusting disc 24 moves through the V-shaped guide groove 242 to move the cross locking rod 25 into the corresponding cross locking groove 11, thereby locking the hole-expanding assembly 2. The adjusting disc 24 also drives the driven gear 232 to rotate during the rotation process, thereby realizing the rotation and cutting of the trapezoidal blade 23. The angle of the trapezoidal blade 23 is adjusted, and the opening diameter of the trapezoidal blade 23 is adjusted accordingly, thereby realizing the hole-expanding diameter adjustment.

[0031] Specifically, the shaft at the upper end of one of the trapezoidal blades 23 passes through the upper cutter head 21, and a pointer 233 is fixedly connected to the end of the shaft. An angle gauge 211 is located on the upper cutter head 21 at the position corresponding to the pointer 233, and the angle gauge 211 has a length mark corresponding to the enlarged hole diameter. During the rotation and cutting process of the trapezoidal blade 23, the pointer 233 rotates on the angle gauge 211, and precise adjustment is achieved through the length mark of the enlarged hole diameter.

[0032] Specifically, the lower cutter head 22 has an adjustment groove 223 on its side wall. The adjustment locking rod 26 passes through the inner groove wall of the lower cutter head 22, and the end of the adjustment locking rod 26 is connected to a cross nut 262 located in the adjustment groove 223. The other end of the adjustment locking rod 26 is rotatably connected to a bearing seat located on the lower cutter head 22. By rotating the cross nut 262 with a screwdriver, the adjustment locking rod 26 is rotated, thereby causing the worm gear 261 to drive the worm wheel 243 to rotate, thus enabling the adjustment disc 24 to rotate.

[0033] Specifically, a limiting block 12 located on the upper cutting disc 21 is fixedly connected to the tool holder 1, and a locking nut 13 for locking the lower cutting disc 22 is threadedly connected to the lower end of the tool holder 1. By inserting the reaming assembly 2 into the tool holder 1, the limiting block 12 limits the reaming assembly 2, and the threaded connection between the locking nut 13 and the tool holder 1 positions the reaming assembly 2, so that the end of the cross locking rod 25 corresponds to the cross locking groove 11.

[0034] Specifically, the inner wall of the lower cutter disc 22 is provided with a plurality of second rotating grooves 224 arranged in a circular array, and the driven gear 232 is correspondingly arranged in the second rotating grooves 224.

[0035] When in use, firstly, when installing the reaming assembly 2, insert the reaming assembly 2 into the lower end of the corresponding tool holder 1. The upper end of the reaming assembly 2 is limited by the limiting block 12, and the lower end of the reaming assembly 2 is threadedly connected to the tool holder 1 by the locking nut 13 to position the reaming assembly 2. In the initial state, the cross locking rod 25 on the reaming assembly 2 is aligned with the cross locking groove 11 on the tool holder 1 and is in an uninserted state.

[0036] When a hole enlargement operation is required, the hole diameter is determined according to the enlargement hole diameter requirements. First, a screwdriver is inserted into the adjustment groove 223. The cross nut 262 is rotated to drive the adjustment locking rod 26 to rotate. The meshing of the worm gear part 261 and the worm wheel part 243 drives the adjustment plate 24 to rotate. Then, the guide wheel 251 is squeezed by one of the inclined grooves of the V-shaped guide groove 242. In the initial state, the guide wheel 251 is located at the corner of the V-shaped guide groove 242, which drives the cross locking rod 25 to move towards the center of the adjustment plate 24 and insert into the cross locking groove 11 to achieve the positioning and locking of the hole enlargement assembly 2. The cross locking rod 25 moves in the cross moving groove 221. The stroke of the cross locking rod 25 in the cross moving groove 221 is greater than the stroke of the cross locking rod 25 driven by the inclined groove on the V-shaped guide groove 242, ensuring that the cross locking rod 25 is always in the cross moving groove 221 and in the positioning and locking state.

[0037] Furthermore, during the rotation of the adjustment disc 24, the driven gear 232 is driven to rotate synchronously through the active gear part 241, thereby realizing the synchronous rotation of multiple trapezoidal blades 23. The rotation angle of the trapezoidal blade 23 is located according to the pointer 233 and the corresponding angle ruler 211, and the length mark of the enlarged hole diameter provided on the angle ruler 211 is used to determine the required enlarged hole diameter.

[0038] Furthermore, the adjusting disc 24 is limited by the V-shaped guide groove 242 and the guide wheel 251. The maximum rotation angle of the adjusting disc 24 is 30 degrees, and the number of teeth of the adjusting disc 24 is more than three times the number of teeth of the driven gear 232, ensuring that the driven gear 232 and the trapezoidal blade 23 rotate at least 90 degrees, so as to realize the maximum aperture of the trapezoidal blade 23 rotation adjustment.

[0039] Furthermore, the double-edged design of the trapezoidal blade 23 facilitates the switching of different blades 231 during the forward and reverse rotation of the adjustment disc 24, thereby increasing the service life of the trapezoidal blade 23.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reamer with a locking mechanism, comprising a shank (1), characterized in that: The lower side wall of the tool holder (1) is provided with a plurality of cross locking grooves (11) arranged in a circular array. The tool holder (1) is provided with a hole-expanding assembly (2). The hole-expanding assembly (2) includes an upper cutting disc (21) and a lower cutting disc (22). The tool holder (1) passes through the upper cutting disc (21) and the lower cutting disc (22). The inner wall of the lower cutting disc (22) is provided with a plurality of cross moving grooves (221) arranged in a circular array. A plurality of trapezoidal blades (23) are arranged in a circular array between the upper cutting disc (21) and the lower cutting disc (22). The upper and lower ends of the trapezoidal blades (23) are rotatably connected to the upper cutting disc (21) and the lower cutting disc (22) through shafts. The two symmetrical inclined sides of the trapezoidal blades (23) are provided with cutting edges (231). A driven gear (232) is fixedly connected to the shaft at the lower end of the trapezoidal blades (23). The hole-expanding assembly (2) also includes an adjustment disk (24) rotatably connected to the internal groove of the lower cutter disc (22), and the center of the adjustment disk (24) is provided with a through groove for the tool holder (1) to pass through. The upper outer edge of the adjustment disk (24) is provided with a drive gear (241), and the drive gear (241) is meshed with the driven gear (232). The adjustment disk (24) is provided with a plurality of V-shaped guide grooves (242) arranged in a circular array, and the lower end of the adjustment disk (24) is provided with a worm gear (243). The enlarged hole assembly (2) also includes a cross locking rod (25) correspondingly provided on the cross moving groove (221). One end of the cross locking rod (25) is respectively provided in the cross locking groove (11), and the lower end of the cross locking rod (25) is rotatably connected to a guide wheel (251) through a shaft. The guide wheel (251) is correspondingly provided on the V-shaped guide groove (242). The hole enlarging assembly (2) also includes an adjusting locking rod (26) located at the lower end of the adjusting plate (24), and the adjusting locking rod (26) is provided with a worm gear part (261) that meshes with the worm gear part (243).

2. The reaming tool according to claim 1, characterized in that: The lower cutter disc (22) has a first rotating groove (222) at the center of its internal groove, and the lower end of the worm gear (243) has a rotating ring (244), and the rotating ring (244) and the first rotating groove (222) are connected by a bearing.

3. The reaming tool according to claim 1, characterized in that: One of the trapezoidal blades (23) has a shaft at the upper end that passes through the upper cutter head (21), and a pointer (233) is fixedly connected to the end of the shaft. An angle ruler (211) is provided at the position corresponding to the pointer (233) on the upper cutter head (21), and the angle ruler (211) is provided with a length mark corresponding to the enlarged hole diameter.

4. The reaming tool according to claim 1, characterized in that: The lower cutter disc (22) has an adjustment groove (223) on its side wall. The adjustment locking rod (26) passes through the inner groove wall of the lower cutter disc (22), and the end of the adjustment locking rod (26) is connected to a cross nut (262) located in the adjustment groove (223).

5. The reaming tool according to claim 4, characterized in that: The tool holder (1) is fixedly connected to a limiting block (12) located on the upper tool disc (21), and the lower end of the tool holder (1) is threadedly connected to a locking nut (13) for locking the lower tool disc (22).

6. The reaming tool according to claim 1 or 5, characterized in that: The inner wall of the lower cutter disc (22) is provided with a plurality of second rotating grooves (224) arranged in a circular array, and the driven gear (232) is correspondingly arranged in the second rotating grooves (224).

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