A tool for reaming a tail hole of a bushing

Abstract

The utility model discloses a frock for bushing tail hole of fork drill and bore, including two claw self -centering chuck, centre and two type board of opening cone hole has to the two claw self -centering chuck, the handle of centre is the taper handle of the taper of equal taper of cone hole, the taper handle of centre is inserted in cone hole, two type boards are symmetrically set up to the two claw self -centering chuck center as the axis, two type board front end is connected respectively on the two claw self -centering chuck two clamping paws, and the symmetrically opening round -arc -shaped bayonet of two type board rear end opposite surfaces, the diameter of bayonet is equal with the diameter of bushing fork tail part outer circle, the surface on the rear end of type board towards two claw self -centering chuck is opened and has the sliding slot. The utility model discloses the clamping mode by clamping outer circle changes one clamps one top, avoids when bushing bore hole to fork, and the big bounce is avoided, and the machining precision is ensured, and the mode simple and quick of the clamping paw of two claw self -centering chuck drive type board to bushing fork clamping is simple and quick, and the bushing fork is convenient to assemble and disassemble.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and in particular relates to a tooling for boring tail holes with a fork drill. Background Technology

[0002] Currently, it is necessary to clamp and fix the fork 100 on the lathe spindle, and then install a drill bit or boring tool on the lathe tailstock to drill and bore the tail of the fork 100.

[0003] like Figure 5 As shown, the existing fork clamping fixture consists of a flange, a support frame, a pressure plate, and bolts. The flange is fixedly connected to the support frame, and the other side is connected to the machine tool spindle. During machining, the fork 100 is placed on the support frame, the pressure plate is used to press the outer diameter of the fork 100's tail, and the nut is tightened to clamp and fix the fork 100. However, because the axial length of the outer diameter of the fork 100's tail is relatively short, it cannot meet the required clamping length, resulting in large runout during boring of the inner hole, which affects machining accuracy. Moreover, manually clamping the fork 100 by tightening the nut is inconvenient for loading and unloading the fork 100, affecting machining efficiency. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a tooling for boring tail holes with a fork drill.

[0005] To solve the above problems, the present invention adopts the following technical solution: A tooling for boring a tail hole with a fork drill includes a two-jaw self-centering chuck, a center, and two C-shaped plates. The two-jaw self-centering chuck has a conical hole at its center. The shank of the center is a conical shank with a taper equal to the taper of the conical hole, and the conical shank of the center is inserted into the conical hole. The two C-shaped plates are symmetrically arranged facing each other about the center of the two-jaw self-centering chuck. The front ends of the two C-shaped plates are respectively connected to the two jaws of the two-jaw self-centering chuck, and the rear ends of the two C-shaped plates face each other. The surface is symmetrically provided with arc-shaped slots, the diameter of which is equal to the diameter of the outer circle of the fork tail. The rear end of the shaped plate is provided with a sliding groove on the surface facing the two-jaw self-centering chuck. A wedge block is slidably connected in the sliding groove. The surface of the wedge block facing the two-jaw self-centering chuck is an inclined surface that can fit against the conical surface of the fork tail. A spring is pressed between the end of the sliding groove and the wedge block to press the wedge block toward the center of the two-jaw self-centering chuck.

[0006] Preferably, the U-shaped plate includes an L-shaped connecting plate and an L-shaped clamping plate. The L-shaped connecting plate includes a fixing part and a first connecting part that are perpendicularly connected to each other. The fixing part is connected to the jaws. The first connecting part has a plurality of sets of first connecting holes spaced apart along the direction of the center axis of the two jaws from the centering chuck. The L-shaped clamping plate includes a clamping part and a second connecting part that are perpendicularly connected to each other. The second connecting part has a set of second connecting holes that correspond to the positional relationship of the first connecting holes. The second connecting part is attached to one side of the first connecting part and the second connecting holes are aligned with one of the sets of first connecting holes. The clamping part and the fixing part are parallel to each other. The bayonet is provided on the clamping part, and the sliding groove is provided on the side surface of the clamping part facing the fixing part.

[0007] Preferably, the surfaces of the second connecting part and the first connecting part that are in contact with each other are respectively provided with a matching concave stop and a convex stop.

[0008] Preferably, the arc angle of the bayonet is less than 180 degrees.

[0009] Preferably, a sliding column is provided in the groove, one end of the sliding column is connected to the end of the groove, the wedge block and the spring are slidably sleeved on the sliding column, and a limit block is provided at the other end of the sliding column.

[0010] The beneficial effects of this utility model are: Compared with existing technologies, the advantages of this utility model are: The clamping method of this utility model changes from clamping the outer circle to clamping one and lifting one, which avoids large runout when boring the inner hole of the sleeve fork and ensures machining accuracy; and the method of using the jaws of the two-jaw self-centering chuck to drive the C-shaped plate to clamp the sleeve fork is simple and quick, and facilitates loading and unloading of the sleeve fork. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is an exploded view of the components of this utility model; Figure 4 for Figure 2 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the existing fork clamping fixture.

[0012] In the diagram: 1. Two-jaw self-centering chuck; 11. Conical hole; 12. Jaw; 2. Center point; 21. Conical shank; 31. L-shaped connecting plate; 311. Fixing part; 312. First connecting part; 3121. First connecting hole; 3122. Recessed stop; 32. L-shaped clamping plate; 321. Clamping part; 322. Second connecting part; 3221. Second connecting hole; 3222. Protruding stop; 4. Bay; 5. Slide groove; 6. Wedge block; 7. Spring; 8. Sliding column; 9. Limiting block; 100. Sleeve fork. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1-4 As shown, this utility model provides a technical solution: a tooling for boring a tail hole with a fork drill, comprising a two-jaw self-centering chuck 1, a center 2, and two C-shaped plates. The two-jaw self-centering chuck 1 has a conical hole 11 at its center. The shank of the center 2 is a conical shank 21 with a taper equal to the taper of the conical hole 11, and the conical shank 21 is inserted into the conical hole 11. The two C-shaped plates are symmetrically arranged facing each other about the center of the two-jaw self-centering chuck 1, and the front ends of the two C-shaped plates are respectively connected to the two jaws 12 of the two-jaw self-centering chuck 1. A circular arc-shaped notch 4 is symmetrically opened on the facing surfaces of the rear ends of the C-shaped plate. The diameter of the notch 4 is equal to the diameter of the outer circle of the tail of the fork 100. A sliding groove 5 is opened on the surface of the rear end of the C-shaped plate facing the two-jaw self-centering chuck 1. A wedge block 6 is slidably connected in the sliding groove 5. The surface of the wedge block 6 facing the two-jaw self-centering chuck 1 is an inclined surface that can fit against the conical surface of the tail of the fork 100. A spring 7 is pressed between the end of the sliding groove 5 and the wedge block 6 to press the wedge block 6 toward the center of the two-jaw self-centering chuck 1.

[0015] When machining the sleeve fork 100, align the center hole of the sleeve fork 100 with the tip 2, drive the two-jaw self-centering chuck 1 so that the two jaws 12 move toward the center of the two-jaw self-centering chuck 1. The wedge blocks 6 on the two C-shaped plates first contact the conical surface of the tail of the sleeve fork 100. Under the elastic force of the spring 7, the wedge blocks 6 press the conical surface of the tail of the sleeve fork 100 so that the sleeve fork 100 is pressed against the tip 2. As the two jaws 12 drive the two C-shaped plates to move closer and closer, the arc-shaped jaws 4 at the rear end of the two C-shaped plates clamp the outer circle of the tail of the sleeve fork 100, thereby clamping and fixing the sleeve fork 100 on the lathe spindle. The clamping method of this utility model changes from clamping the outer circle to clamping and lifting, which avoids large runout when boring the inner hole of the sleeve fork 100 and ensures machining accuracy; and the method of using the jaws 12 of the two-jaw self-centering chuck 1 to drive the shaped plate to clamp the sleeve fork 100 is simple and quick, and facilitates loading and unloading of the sleeve fork 100.

[0016] Furthermore, the L-shaped plate includes an L-shaped connecting plate 31 and an L-shaped clamping plate 32. The L-shaped connecting plate 31 includes a fixing part 311 and a first connecting part 312 that are perpendicularly connected to each other. The fixing part 311 is connected to the jaw 12. The first connecting part 312 has a plurality of first connecting holes 3121 spaced apart along the central axis of the self-centering chuck 1 of the two jaws. The L-shaped clamping plate 32 includes a clamping part 321 and a second connecting part 322 that are perpendicularly connected to each other. The second connecting part 322 has a set of second connecting holes 3221 that correspond to the positional relationship of the first connecting holes 3121. The second connecting part 322 fits against one side of the first connecting part 312 and the second connecting holes 3221 are aligned with one of the sets of first connecting holes 3121. The clamping part 321 is parallel to the fixing part 311. The bayonet 4 is provided on the clamping part 321. The sliding groove 5 is provided on the side surface of the clamping part 321 facing the fixing part 311. In use, the second connecting hole 3221 can be aligned with the first connecting hole 3121 at different positions according to the length of the sleeve fork 100, thereby adjusting the opening length of the shaped plate and making this utility model applicable to sleeve forks 100 of different lengths.

[0017] Furthermore, the surfaces of the second connecting part 322 and the first connecting part 312 that are in contact with each other are respectively provided with a concave stop 3122 and a convex stop 3222 to ensure the position of the latch 4 on the L-shaped clamp 32 and to ensure the symmetry accuracy of the L-shaped clamp 32.

[0018] Furthermore, to prevent the clamping part 321 of the two C-shaped plates from not clamping the outer circle of the tail of the sleeve fork 100 when they meet, the arc angle of the clamping part 4 is less than 180 degrees to ensure that the clamping part 4 clamps the outer circle of the tail of the sleeve fork 100.

[0019] Furthermore, a sliding post 8 is provided in the sliding groove 5. One end of the sliding post 8 is connected to the end of the sliding groove 5. The wedge block 6 and the spring 7 are slidably sleeved on the sliding post 8. A limit block 9 is provided at the other end of the sliding post 8. The limit block 9 blocks the wedge block 6 to prevent the wedge block 6 from falling out of the sliding groove 5.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for reaming a tail hole of a bushing, characterized by, The chuck includes a two-jaw self-centering chuck (1), a center point (2), and two mortise plates. The two-jaw self-centering chuck (1) has a conical hole (11) at its center. The shank of the center point (2) is a conical shank (21) with a taper equal to that of the conical hole (11). The conical shank (21) of the center point (2) is inserted into the conical hole (11). The two mortise plates are symmetrically arranged facing each other about the center of the two-jaw self-centering chuck (1). The front ends of the two mortise plates are respectively connected to the two jaws (12) of the two-jaw self-centering chuck (1). The rear ends of the two mortise plates have symmetrically arranged arcs on their facing surfaces. The shaped jaw (4) has a diameter equal to the diameter of the outer circle of the tail of the fork (100). A groove (5) is provided on the surface of the rear end of the shaped plate facing the two-jaw self-centering chuck (1). A wedge block (6) is slidably connected in the groove (5). The surface of the wedge block (6) facing the two-jaw self-centering chuck (1) is an inclined surface that can fit against the conical surface of the tail of the fork (100). A spring (7) is pressed between the end of the groove (5) and the wedge block (6) to press the wedge block (6) toward the center of the two-jaw self-centering chuck (1).

2. The tooling for boring tail hole of a sleeve fork according to claim 1, characterized in that, The L-shaped plate includes an L-shaped connecting plate (31) and an L-shaped clamping plate (32). The L-shaped connecting plate (31) includes a fixing part (311) and a first connecting part (312) that are perpendicularly connected to each other. The fixing part (311) is connected to the jaws (12). The first connecting part (312) has several sets of first connecting holes (3121) spaced apart along the central axis of the two jaws from the centering chuck (1). The L-shaped clamping plate (32) includes a clamping part (321) and a second connecting part (322) that are perpendicularly connected to each other. The connecting part (322) is provided with a set of second connecting holes (3221) corresponding to the positional relationship of the first connecting hole (3121). The second connecting part (322) is attached to one side of the first connecting part (312) and the second connecting hole (3221) is aligned with one of the first connecting holes (3121). The clamping part (321) and the fixing part (311) are parallel to each other. The bayonet (4) is provided on the clamping part (321). The sliding groove (5) is provided on the side surface of the clamping part (321) facing the fixing part (311).

3. The tooling for boring a tail hole in a socketed shaft according to claim 2, wherein, The second connecting part (322) and the first connecting part (312) are respectively provided with a concave stop (3122) and a convex stop (3222) on their surfaces that fit together.

4. The tooling for boring a tail hole in a bushing according to claim 1, wherein, The arc angle of the bayonet (4) is less than 180 degrees.

5. The tooling for boring a tail hole in a bushing according to claim 1, wherein, A sliding column (8) is provided in the groove (5). One end of the sliding column (8) is connected to the end of the groove (5). The wedge block (6) and the spring (7) are slidably sleeved on the sliding column (8). A limit block (9) is provided at the other end of the sliding column (8).

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