Reducing boring cutter structure

Abstract

The utility model discloses a reducing boring cutter structure which comprises a connector and an adjusting mechanism. A cutter handle is fixed to one end of the connector, a pair of linear sliding grooves are formed in the cutter handle, sliding blocks are arranged in the linear sliding grooves in a sliding mode, cutter holders are fixed to the two opposite ends of the sliding blocks, and blades are installed on the cutter holders; the adjusting mechanism is installed in the cutter handle and comprises a main shaft, the main shaft is arranged in the cutter handle and rotationally provided with a rotating ring, a gear is fixed to the rotating ring, racks are arranged on the sides, close to the gear, of the pair of sliding blocks, the gear is meshed with the pair of racks, and a fixing ring is fixed to the position, below the rotating ring, of the main shaft. A threaded head is fixed to the lower portion of the fixing ring, a threaded hole matched with the threaded head is formed in the cutter handle, and a pressing piece is rotationally arranged at the end, arranged outside the cutter handle, of the main shaft and pressed on the pair of sliding blocks. Through the related structural design, the radial extension length of the double-edge boring cutter lug can be synchronously adjusted, so that the machining precision is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of machining tool technology, specifically relating to a variable diameter boring tool structure. Background Technology

[0002] A boring bar is a special tool used for machining holes in mechanical processing. It is mainly used for internal hole cutting, hole reaming, and contour machining. Among them, the variable diameter boring bar is a boring tool that can change the cutting diameter in real time during the machining process. It is widely used in aerospace, energy, shipbuilding, engineering machinery and other fields.

[0003] Variable diameter boring tools are divided into single-edge boring tools and double-edge boring tools. Double-edge boring tools have higher machining accuracy and efficiency. However, when adjusting the radial size, existing double-edge boring tools cannot adjust the radial size of the two boring tools at the same time. Operators need to adjust them one by one, which is not only time-consuming and laborious, but also results in errors in the adjusted radial size of the two ends.

[0004] Therefore, to address the aforementioned technical problems, it is necessary to provide a variable diameter boring tool structure.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a variable diameter boring tool structure that can solve the problem that existing double-edged boring tools cannot be adjusted synchronously.

[0007] To achieve the above objectives, a specific embodiment of this utility model provides a variable diameter boring tool structure, including: a connector and an adjustment mechanism;

[0008] One end of the connector is fixed with a knife handle, and a pair of straight grooves are chiseled on the knife handle. A slider is slidably arranged in each of the pair of straight grooves. A knife holder is fixed at each of the opposite ends of the pair of sliders, and a blade is installed on the knife holder.

[0009] The adjusting mechanism is installed inside the tool holder. The adjusting mechanism includes a main shaft. A rotating ring is rotatably mounted on the main shaft inside the tool holder. A gear is fixed on the rotating ring. A rack is chiseled on the side of each of the two sliders near the gear. The gear and the rack mesh with each other. A fixing ring is fixed on the main shaft below the rotating ring. A threaded head is fixed below the fixing ring. A threaded hole adapted to the threaded head is chiseled inside the tool holder. A clamping member is rotatably mounted on one end of the main shaft outside the tool holder. The clamping member presses against the pair of sliders.

[0010] In one or more embodiments of this utility model, a blade groove is chiseled on the blade holder, and the blade is installed in the blade groove, which is used for embedded installation of the blade.

[0011] In one or more embodiments of this utility model, a bolt is fastened between the blade and the blade holder, thereby fixing the blade and the blade holder together.

[0012] In one or more embodiments of this utility model, the tool holder is provided with scales on both sides of a pair of sliders, and each pair of sliders is chiseled with a pointer groove. The length of the tool holder extension is determined by the vertical direction pointed to by the pointer groove on the scale, thereby determining the size of the machining radius.

[0013] In one or more embodiments of this utility model, the cutting surfaces of the pair of cutting blades and the radial direction of the tool holder belong to the same plane, thereby ensuring the cutting performance of the boring tool and the geometric accuracy of the hole during the machining process.

[0014] In one or more embodiments of this utility model, a pair of locking blocks are fixed on the fixed ring, and a pair of locking grooves adapted to the locking blocks are chiseled at the bottom of the rotating ring. The main shaft drives the fixed ring to move upward, so that the pair of locking blocks are locked in a pair of pointer grooves. Then the main shaft is rotated, and the main shaft drives the rotating ring to rotate through the fixed ring.

[0015] In one or more embodiments of this utility model, a spring is installed between the bottom end of the fixing ring and the inner wall of the tool holder. When the threaded head is not screwed into the threaded hole, the spring force pushes the fixing ring upward, thereby pushing the locking block into the locking groove. At the same time, the fixing ring drives the main shaft to move upward.

[0016] In one or more embodiments of this utility model, a pair of clamping grooves are cut into the clamping member, and the pair of clamping grooves are engaged with a pair of sliders. When the clamping member presses down, the pair of clamping grooves are engaged with a pair of sliders, thereby fixing the pair of sliders.

[0017] In one or more embodiments of this utility model, the slider is provided with a first anti-slip tooth, and the top wall of the pressing groove is provided with a second anti-slip tooth that matches the first anti-slip tooth. By providing the matching first and second anti-slip teeth, the slider is prevented from sliding when the pressing member presses it.

[0018] In one or more embodiments of this utility model, a screwing head is fixed at one end of the main shaft located inside the clamping member, and the screwing head drives the main shaft to rotate.

[0019] Compared with the prior art, this utility model, through related structural design, can simultaneously adjust the radial extension length of the double-edged boring bar lugs, thereby effectively improving machining accuracy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of a variable diameter boring tool structure according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 The structural diagram shown at point A in the middle;

[0023] Figure 3 This is a cross-sectional view of a variable diameter boring tool structure in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the unfolded structure of the adjustment mechanism in one embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the adjustment mechanism from another perspective in one embodiment of the present invention;

[0026] Figure 6 for Figure 5 The structural diagram shown at point B in the middle;

[0027] Figure 7 This is a schematic diagram of the clamping component in one embodiment of the present invention.

[0028] Explanation of key figure labels:

[0029] 1-Connector, 101-Tool holder, 102-Linear slide, 103-Slider, 104-Tool holder, 105-Blade slot, 106-Blade, 107-Bolt, 108-Scale, 109-Pointer slot, 2-Adjusting mechanism, 201-Spindle, 202-Rotating ring, 203-Gear, 204-Rack, 205-Fixing ring, 206-Clamping block, 207-Threaded head, 208-Spring, 209-Clamping groove, 210-Threaded hole, 211-Clamping element, 212-Clamping groove, 213-First anti-slip tooth, 214-Second anti-slip tooth, 215-Turning head. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] like Figures 1 to 7 As shown, a variable diameter boring tool structure in one embodiment of the present invention includes: a connector 1 and an adjustment mechanism 2.

[0032] like Figures 1 to 4 As shown, a tool holder 101 is fixed to one end of the connector 1. The connector 1 is connected to the rotating device, and the connector 1 drives the tool holder 101 to rotate. A pair of straight grooves 102 are carved on the tool holder 101. A slider 103 is slidably arranged in each of the pair of straight grooves 102. Tool holders 104 are fixed at opposite ends of the pair of sliders 103. A cutting blade 106 is installed on the tool holder 104. The sliders 103 drive the tool holder 104 to move along the trajectory of the straight grooves 102, thereby adjusting the cutting radius of the cutting blade 106.

[0033] like Figures 1 to 4 As shown, a blade groove 105 is cut into the tool holder 104, and a blade 106 is installed in the blade groove 105. The blade groove 105 is used for the embedded installation of the blade 106. A bolt 107 is fastened between the blade 106 and the tool holder 104, and the blade 106 and the tool holder 104 are fixed together by the bolt 107.

[0034] like Figures 1 to 4 As shown, the tool holder 101 has scales 108 on both sides of a pair of sliders 103. Each slider 103 has a pointer groove 109. The length of the tool holder 104 extending out is determined by the vertical direction pointed to by the pointer groove 109 on the scale 108, thus determining the machining radius. The cutting surfaces of the pair of inserts 106 are on the same plane as the radial direction of the tool holder 101, thereby ensuring the cutting performance of the boring tool and the geometric accuracy of the hole during machining.

[0035] like Figures 1 to 7As shown, the adjustment mechanism 2 is installed inside the tool holder 101. The adjustment mechanism 2 includes a main shaft 201. The main shaft 201 is rotatably mounted inside the tool holder 101 with a rotating ring 202. A gear 203 is fixed on the rotating ring 202. A pair of sliders 103 are each cut with a rack 204 on the side near the gear 203. The gear 203 and the pair of racks 204 mesh with each other. By driving the rotating ring 202 to rotate, the rotating ring 202 drives the gear 203 to rotate. The gear 203 drives the pair of sliders 103 to move in opposite directions simultaneously through the pair of racks 204. The sliders 103 drive the tool holder 104 to move synchronously, thereby adjusting the cutting radius of the blade 106.

[0036] like Figures 1 to 7 As shown, a fixing ring 205 is fixed on the main shaft 201 below the rotating ring 202. The fixing ring 205 is used to drive the rotating ring 202 to rotate. A threaded head 207 is fixed below the fixing ring 205. A threaded hole 210 adapted to the threaded head 207 is drilled in the tool holder 101. A clamping member 211 is rotatably installed at one end of the main shaft 201 outside the tool holder 101. The clamping member 211 presses on a pair of sliders 103. The main shaft 201 is driven to rotate by the screwing head 215. The main shaft 201 drives the threaded head 207 to tighten in the threaded hole 210, thereby locking the clamping member 211 downward by the screwing head 215, so that the clamping member 211 locks the pair of sliders 103.

[0037] like Figures 3 to 7 As shown, a pair of locking blocks 206 are fixed on the fixed ring 205, and a pair of slots 209 adapted to the locking blocks 206 are carved at the bottom of the rotating ring 202. The spindle 201 drives the fixed ring 205 to move upward, so that the pair of locking blocks 206 are engaged in the pair of pointer slots 109. Then, the spindle 201 is rotated, and the spindle 201 drives the rotating ring 202 to rotate through the fixed ring 205. A spring 208 is installed between the bottom end of the fixed ring 205 and the inner wall of the tool holder 101. When the threaded head 207 is not screwed into the threaded hole 210, the elastic force of the spring 208 pushes the fixed ring 205 upward, thereby pushing the locking blocks 206 into the slots 209. At the same time, the fixed ring 205 drives the spindle 201 to move upward.

[0038] like Figures 3 to 7As shown, the clamping member 211 has a pair of clamping grooves 212, which are engaged with a pair of sliders 103. When the clamping member 211 presses down, it engages the pair of clamping grooves 212 with the pair of sliders 103, thereby fixing the pair of sliders 103. The sliders 103 are provided with first anti-slip teeth 213, and the top wall of the clamping grooves 212 is provided with second anti-slip teeth 214 that match the first anti-slip teeth 213. By providing the matching first anti-slip teeth 213 and second anti-slip teeth 214, the sliders 103 are prevented from sliding when the clamping member 211 presses them down. A screw head 215 is fixed to one end of the main shaft 201 located inside the clamping member 211, and the screw head 215 drives the main shaft 201 to rotate.

[0039] Working principle: When using this device, the connector 1 is connected to the rotating device to drive it to rotate. The connector 1 drives the tool holder 101 to rotate, so that the blade 106 performs cutting operations.

[0040] When adjusting the cutting radius of the blade 106, first insert a wrench into the screw head 215 and rotate it. The screw head 215 drives the spindle 201 to rotate, and the spindle 201 drives the threaded head 207 to be screwed out of the threaded hole 210. After the threaded head 207 is screwed out of the threaded hole 210, the elastic force of the spring 208 pushes the retaining ring 205 upward. The retaining ring 205 drives the locking block 206 to move upward and lock into the locking groove 209. If the locking block 206 moves upward during this process... Align the 206 with the slot 209 and insert it directly into the slot 209. If there is no alignment, simply rotate the screw head 215. The screw head 215 drives the fixing ring 205 to rotate through the main shaft 201. Rotate until the locking block 206 is aligned with the slot 209, and the locking block 206 will be inserted into the slot 209. The fixing ring 205 moves upward and at the same time drives the screw head 215 to move upward through the main shaft 201, so that the screw head 215 no longer presses against the clamping member 211, and the clamping member 211 no longer presses against the pair of sliders 103.

[0041] Then lift the clamping part 211 upwards, and then rotate the screw head 215. The screw head 215 drives the fixed ring 205 to rotate through the main shaft 201. The fixed ring 205 drives the rotating ring 202 to rotate. The rotating ring 202 drives the gear 203 to rotate. The gear 203 drives a pair of sliders 103 to move in opposite directions simultaneously through a pair of racks 204. The sliders 103 drive the tool holder 104 to move synchronously. Observe the value pointed to by the pointer groove 109 on the scale 108. Adjust the cutting radius of the blade 106 according to the specific needs.

[0042] After adjustment, move the clamping member 211 downward so that a pair of clamping grooves 212 are engaged with a pair of sliders 103. Then, press the screwing head 215 downward. The screwing head 215 drives the spindle 201, the retaining ring 205, and the threaded head 207 downward. The retaining ring 205 compresses the spring 208 again, pressing the threaded head 207 down to the threaded hole 210. By rotating the screwing head 215, the threaded head 207 is tightened into the threaded hole 210. At the same time as tightening, the spindle 201 drives the screwing head 215 downward. The screwing head 215 locks the clamping member 211 downward. The clamping member 211 locks the pair of sliders 103 downward. This completes the adjustment of the cutting radius of the blade 106.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A variable diameter boring tool structure, characterized in that, include: A connector, one end of which is fixed with a knife handle, a pair of straight grooves are chiseled on the knife handle, a slider is slidably arranged in each of the pair of straight grooves, and a knife holder is fixed at each of the opposite ends of the pair of sliders, and a blade is installed on the knife holder; An adjustment mechanism is installed inside the tool holder. The adjustment mechanism includes a main shaft, a rotating ring rotatably mounted on the main shaft inside the tool holder, a gear fixed on the rotating ring, and racks drilled on the side of each of the pair of sliders near the gears. The gears mesh with the pair of racks. A fixing ring is fixed on the main shaft below the rotating ring, and a threaded head is fixed below the fixing ring. A threaded hole adapted to the threaded head is drilled inside the tool holder. A clamping member is rotatably mounted on one end of the main shaft outside the tool holder, and the clamping member presses against the pair of sliders.

2. The variable diameter boring tool structure according to claim 1, characterized in that, The tool holder has a blade groove, and the blade is installed in the blade groove.

3. The variable diameter boring tool structure according to claim 2, characterized in that, The blade and the blade holder are fastened together by bolts.

4. The variable diameter boring tool structure according to claim 1, characterized in that, The handle has scales on both sides of a pair of sliders, and each pair of sliders has a pointer groove.

5. The variable diameter boring tool structure according to claim 1, characterized in that, The cutting surfaces of the pair of blades are on the same plane as the radial direction of the tool holder.

6. The variable diameter boring tool structure according to claim 1, characterized in that, A pair of locking blocks are fixed on the fixed ring, and a pair of locking grooves adapted to the locking blocks are chiseled at the bottom of the rotating ring.

7. The variable diameter boring tool structure according to claim 1, characterized in that, A spring is installed between the bottom end of the retaining ring and the inner wall of the tool holder.

8. The variable diameter boring tool structure according to claim 1, characterized in that, The clamping member has a pair of clamping grooves, which are engaged with a pair of sliders.

9. The variable diameter boring tool structure according to claim 8, characterized in that, The slider is provided with a first anti-slip tooth, and the top wall of the pressing groove is provided with a second anti-slip tooth that matches the first anti-slip tooth.

10. The variable diameter boring tool structure according to claim 1, characterized in that, The main shaft is fixed with a screw head at one end inside the clamping component.

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