Hole opener with reaming function

Abstract

The utility model belongs to the technical field of tapping tools, and particularly relates to a tapper with a chambering function, which comprises a support component provided with a material returning groove, and the front side of the upper part of the support component is provided with a fixed cutter part; the pull rod is arranged on the supporting assembly in a penetrating mode, and the upper end and the lower end of the pull rod both extend out of the material returning groove; the movable cutter piece is installed at the upper end of the pull rod, and a movable cutter edge part is arranged on the front side of the movable cutter piece in a protruding mode; the driving device is installed at the lower end of the supporting assembly, and the driving device is connected with the lower end of the pull rod; the pull rod is pulled through the driving device, so that the rear side wall of the movable cutter piece slides in a manner of being attached to the supporting assembly, and the cutting edge part of the movable cutter piece is matched with the fixed cutter part to generate shearing force. According to the punching device, materials between the movable cutter part and the supporting assembly are punched, meanwhile, the edge of an original hole can be pressed and cut, so that the original hole is expanded, and the punching device is easy and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of hole opening tools, in particular to a hole opener with a hole expanding function. Background Art

[0002] In the manufacturing of machinery and equipment, household appliances and other products, a large number of perforated metal plates are used, such as various boxes, cabinets, etc. People mostly use hole openers to open holes in metal plates (such as steel plates, stainless steel plates, etc.).

[0003] For example, a hydraulic hole opener disclosed in Chinese patent publication number CN207771958U, when used by a staff member, the staff removes the small tie rod nut from the small tie rod, and then removes the male mold from the small tie rod, the staff assembles the workpiece on the small tie rod, and makes the left end face of the workpiece fit with the right end face of the female mold, and then the staff assembles the male mold to the small tie rod, and assembles the small tie rod nut on the right end of the small tie rod, and tightens the small tie rod nut, so that the small tie rod nut drives the male mold to move to the right end face of the workpiece, and then the staff injects oil into the cylinder through the joint, the oil pressure acts on the piston, and generates a leftward thrust on the piston, so that the piston moves to the left, compresses the spring, and at the same time the piston drives the large tie rod to move to the left, the large tie rod drives the small tie rod to move to the left, the small tie rod movement drives the small tie rod nut to move, and the small tie rod nut pushes the male mold to move, so that the male mold cooperates with the female mold to punch a hole in the workpiece.

[0004] There are some shortcomings of the existing hole openers:

[0005] 1. Holes can only be punched according to the shape and size set by the convex and concave molds. When the shape and size of the hole are different from the shape of the mold, molds of different shapes and sizes need to be replaced, which is inconvenient to use. In addition, some molds may not match the required hole size, so the punching operation cannot be performed.

[0006] 2. When the existing hole needs to be enlarged, only one side of the male and female dies of the existing hole opener will contact and cut the metal plate, while the other side will be close to each other without support. Long-term use may easily cause the small pull rod to deform and become unusable, thus affecting its service life. Utility Model Content

[0007] The purpose of the utility model is to provide a hole opener with a hole expansion function, which generates a shear force by cooperating with the moving blade portion protruding from the front side of the moving knife component and the fixed knife portion of the supporting assembly to achieve pressure cutting of the edge of the hole, thereby achieving adjustment of the hole size and improving the problem that the hole opener cannot press and cut holes of different shapes and sizes.

[0008] The purpose of the utility model is achieved in this way:

[0009] A hole opener with hole expansion function, comprising:

[0010] A support assembly is provided with a material return slot, and a fixed knife portion is provided on the upper front side of the support assembly;

[0011] A pull rod, which is passed through the support assembly, and the upper and lower ends of the pull rod extend out of the material withdrawal groove;

[0012] A movable blade is mounted on the upper end of the pull rod, and a movable blade is protruding from the front side of the movable blade;

[0013] A driving device, which is mounted at the lower end of the supporting assembly and connected to the lower end of the pull rod;

[0014] The pull rod is pulled by the driving device, so that the rear side wall of the movable blade member slides in contact with the support assembly, thereby causing the movable blade portion to cooperate with the fixed blade portion to generate a shear force.

[0015] Preferably, a discharge port is provided on the support assembly, and the discharge port is connected to the outside and the material return trough, and is used to discharge the sheared waste materials from the material return trough.

[0016] Preferably, the support assembly comprises:

[0017] A guide plate, on which a guide hole is formed, and the fixed knife portion is set inwardly on the side wall of the guide hole;

[0018] A support seat is installed at the lower end of the guide plate, and the support seat is provided with the material withdrawal groove and the material discharge port.

[0019] Preferably, a vertical avoidance groove is provided at the corner of the material return groove to avoid the corners of the sheared waste.

[0020] Preferably, an arc-shaped cutting edge is arranged on the front side of the lower end of the movable blade portion; cutting edge 1 is arranged on both the left and right sides of the lower end of the movable blade portion, and the cutting edge 1 is arranged obliquely; the connection between the arc-shaped cutting edge and the cutting edge 1 protrudes downward to form an engaging tooth.

[0021] Preferably, the lower end side wall of the discharge port is inclined to form a guiding surface.

[0022] Preferably, the driving device comprises:

[0023] a cylinder body mounted on the lower end of the support assembly;

[0024] A piston is slidably mounted in the cylinder body and forms an oil chamber between the cylinder body, and the upper end of the piston is movably connected to the pull rod; the lower end of the piston has a guide rod, and the guide rod has an oil inlet channel 1, and the piston has an oil inlet channel 2, and the oil inlet channel 2 connects the oil chamber with the oil inlet channel 1;

[0025] A connecting seat connected to the lower end of the cylinder body, the connecting seat is provided with a guide cavity, and the guide rod slides into the guide cavity;

[0026] A spring, disposed between the connecting seat and the piston, for resetting the piston;

[0027] A hydraulic mechanism connected to the lower end of the connecting seat and used for conveying hydraulic oil into the guide cavity;

[0028] The hydraulic mechanism delivers the hydraulic oil from the oil inlet channel 1 through the oil inlet channel 2 to the oil chamber, so that the piston moves in the cylinder body, thereby realizing the movement of the pull rod.

[0029] Preferably, a mounting hole is provided at the upper end of the cylinder body, and a guide column is provided at the upper end of the piston. The guide column is slidably placed in the mounting hole, and a mounting cavity is provided in the guide column. The lower end of the pull rod is installed in the mounting cavity to achieve the connection between the piston and the pull rod.

[0030] Preferably, the piston sleeve is provided with a sealing ring 1, the sealing ring 1 abuts against the inner wall of the cylinder body, the inner wall of the mounting hole is provided with a sealing ring 2, the sealing ring 2 is sleeved on the guide column, and the sealing ring 1 and the sealing ring 2 are used to seal the oil chamber.

[0031] Preferably, the guide rod sleeve is provided with a sealing ring three, and the sealing ring three abuts against the inner wall of the guide cavity.

[0032] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0033] The utility model pulls the pull rod through the driving device, and the pull rod makes the rear side wall of the movable knife member slide against the supporting component, so that the movable knife blade part cooperates with the fixed knife part to generate a shear force, thereby realizing opening a hole in the material between the movable knife member and the supporting component, and at the same time, the edge of the original hole can be pressed and cut, thereby realizing the expansion of the original hole. The utility model is simple and convenient to use, and the waste material cut off by pressing can fall into the material return groove, and the waste material cut off by pressing will not affect the next hole opening, and the holes can be opened continuously for multiple times, thereby improving the efficiency of the hole opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0035] Figure 2 This is one of the partial structural diagrams of Example 1.

[0036] Figure 3 This is the second partial structural diagram of Example 1.

[0037] Figure 4 This is a cross-sectional view of Example 1.

[0038] Figure 5 It is a schematic structural diagram of the movable knife member of Example 1.

[0039] Figure 6 It is a schematic structural diagram of the movable knife member of Example 2.

[0040] : 1. pull rod; 2. support seat; 21. material withdrawal groove; 211. avoidance groove; 22. discharge port; 221. guide surface; 3. guide plate; 31. guide hole; 32. fixed knife part; 4. moving knife part; 41. moving knife blade part; 411. arc-shaped cutting edge; 412. cutting edge one; 413. engaging tooth; 5. cylinder body; 51. oil chamber; 52. mounting hole; 53. sealing ring two; 6. piston; 61. guide rod; 611. oil inlet channel one; 612. oil inlet channel two; 62. guide column; 621. mounting chamber; 63. sealing ring one; 64. sealing ring three; 7. connecting seat; 71. guide chamber; 72. oil inlet channel three; 8. spring; 9. driving device. DETAILED DESCRIPTION

[0041] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0042] Embodiment 1:

[0043] like Figure 1 As shown, a hole opener with hole expanding function includes: a support assembly, a pull rod 1, a movable blade 4 and a driving device 9.

[0044] Combination Figures 2 to 4 A material return groove 21 is provided on the support component, and a fixed knife portion 32 is provided on the upper front side of the support component; a pull rod 1 is passed through the support component, and the upper and lower ends of the pull rod 1 extend out of the material return groove 21; a movable knife 4 is installed on the upper end of the pull rod 1, and a movable blade portion 41 is protruding from the front side of the movable knife 4; a driving device 9 is installed at the lower end of the support component, and the driving device 9 is connected to the lower end of the pull rod 1; the pull rod 1 is pulled by the driving device 9 to move on the support component, so that the rear side wall of the movable knife 4 slides against the support component, so that the movable blade portion 41 cooperates with the fixed knife portion 32 to generate a shear force, and finally the material between the support component and the movable knife 4 is pressed and cut.

[0045] The upper end of the pull rod 1 is threadedly connected with a nut, which abuts against the upper end of the movable blade 4 to prevent the movable blade 4 from detaching from the upper end of the pull rod 1. The nut enables the pull rod 1 to drive the movable blade 4 to move downward.

[0046] Combination Figure 3 and Figure 4The support component is provided with a discharge port 22, which is connected to the outside world and the material return slot 21, and is used to discharge the sheared waste from the material return slot 21. When the pull rod 1 causes the movable blade 4 to move and cooperate with the support component to shear, the sheared waste can be discharged through the discharge port 22. The sheared waste will not affect the next shearing. Only by adjusting the up and down movement of the pull rod 1 in the support component can continuous shearing be achieved, thereby improving the efficiency of hole expansion. The lower end side wall of the discharge port 22 is inclined to form a guide surface 221, and the sheared waste can slide out to the outside world along the guide surface 221, which is convenient for the discharge of the sheared waste, thereby further improving the efficiency of hole expansion; the discharge port 22 is an outwardly expanding port, which is convenient for the discharge of waste.

[0047] Combination Figures 2 to 4 The support assembly includes: a guide plate 3, on which a guide hole 31 is formed, the rear side wall of the movable knife member 4 slides against the side wall of the guide hole 31, and the side wall of the guide hole 31 is retracted to provide a fixed knife portion 32; a support seat 2, which is installed at the lower end of the guide plate 3, and the support seat 2 is provided with a material return groove 21 and a material discharge port 22. The side wall of the guide hole 31 is retracted so that the hole of the material return groove 21 is larger than the hole of the guide hole 31, so that the sheared waste can more easily fall into the material return groove 21 and be discharged from the material discharge port 22.

[0048] The guide hole 31 of this embodiment is rectangular, the peripheral side walls of the movable knife member 4 can fit the side walls of the guide hole 31 and can slide up and down in the guide hole 31, the fixed knife part 32 is surrounded by a rectangle, and the movable blade part 41 can fit the fixed knife part 32 and make the shape of the cut hole rectangular.

[0049] like Figure 3 As shown, a vertical avoidance groove 211 is opened at the corner of the return trough 21 to avoid the corners of the sheared waste. The sheared waste has a right angle due to the rectangular guide hole 31. The avoidance groove 211 is used to avoid the right angle of the waste, making it convenient for the waste to fall into the return trough 21.

[0050] like Figure 5 As shown, the lower front side of the moving blade 41 is provided with an arc-shaped cutting edge 411; the lower left and right sides of the moving blade 41 are provided with a cutting edge 1 412; the connection between the arc-shaped cutting edge 411 and the cutting edge 1 412 protrudes downward to form a bite tooth 413, when the pull rod 1 moves the moving blade 4 downward, the bite tooth 413 first contacts the edge of the hole to be sheared, and the position of the moving blade 4 is determined, and then the arc-shaped cutting edge 411 and the cutting edge 1 412 perform hole expansion operation. The inclined setting of the cutting edge 1 412 can make shearing easier.

[0051] Specific as Figure 4As shown, the driving device 9 includes: a cylinder body 5, which is installed at the lower end of the support assembly and is used to abut the lower end of the support seat 2; a piston 6, which is slidably installed in the cylinder body 5 and forms an oil chamber 51 between the cylinder body 5, and the upper end of the piston 6 is movably connected to the pull rod 1; the lower end of the piston 6 has a guide rod 61, and the guide rod 61 has an oil inlet channel 1 611, and the piston 6 has an oil inlet channel 2 612, and the oil inlet channel 2 612 communicates the oil chamber 51 with the oil inlet channel 1 611; a connecting seat 7, which is threadedly connected Connected to the lower end of the cylinder body 5, the connecting seat 7 is provided with a guide cavity 71, and the guide rod 61 slides into the guide cavity 71; the spring 8 is placed between the connecting seat 7 and the piston 6, and is used to reset the piston 6; the hydraulic mechanism is connected to the lower end of the connecting seat 7, and is used to transport the hydraulic oil to the guide cavity 71; the hydraulic oil is transported from the oil inlet channel 1 611 through the oil inlet channel 2 612 to the oil cavity 51 through the hydraulic mechanism, so that the piston 6 moves in the cylinder body 5, and finally the movement of the pull rod 1 is realized.

[0052] The spring 8 enables the piston 6 to move in the cylinder 5 to compress the volume of the oil chamber 51, so that the hydraulic oil flows out of the oil chamber 51. At the same time, the movement of the piston 6 in the cylinder 5 enables the movement of the pull rod 1, so that the lower end of the moving blade 41 is separated from the guide hole 31, which is convenient for the next hole expansion.

[0053] like Figure 4 A mounting hole 52 is provided at the upper end of the cylinder body 5, and a guide column 62 is provided at the upper end of the piston 6. The guide column 62 is slidably placed in the mounting hole 52, and a mounting cavity 621 is provided in the guide column 62. The lower end of the pull rod 1 can be threadedly connected in the mounting cavity 621 or connected by a snap-fit ​​method to achieve the connection between the piston 6 and the pull rod 1.

[0054] like Figure 4 The piston 6 is provided with a sealing ring 63, the sealing ring 63 abuts against the inner wall of the cylinder body 5, the inner wall of the mounting hole 52 is provided with a sealing ring 53, the sealing ring 53 is sleeved on the guide column 62, and the sealing ring 63 and the sealing ring 53 are used to seal the oil chamber 51.

[0055] like Figure 4 The guide rod 61 is sleeved with a sealing ring 3 64 , which abuts against the inner wall of the guide cavity 71 to prevent the hydraulic oil from flowing out from the gap between the guide rod 61 and the inner wall of the guide cavity 71 .

[0056] An oil inlet channel three 72 is provided at the lower end of the guide cavity 71. The hydraulic mechanism only needs to be able to transport the hydraulic oil from the oil inlet channel three 72 to the guide cavity 71. The hydraulic mechanism can use a hydraulic pump, which is connected to the oil inlet channel three 72 through an oil pipe. The hydraulic oil is transported from the oil inlet channel three 72 to the guide cavity 71 through the hydraulic pump, and then enters the oil cavity 51 through the oil inlet channel one 611 and the oil inlet channel two 612 in turn.

[0057] The specific structure of the hydraulic mechanism can also be referred to the description in Chinese Patent Publication No. CN207393602U, which will not be repeated here.

[0058] Embodiment 2:

[0059] The scheme of this embodiment is basically the same as that of embodiment 1, except that: Figure 6 As shown, the front end of the movable blade portion 41 protrudes outward, the arc-shaped cutting edge 411 has the same shape as the protruding movable blade portion 41, the shape of the fixed blade portion 32 formed by the inward contraction of the side wall of the guide hole 31 is the same as the arc-shaped cutting edge 411, and the arc-shaped cutting edge 411 and the fixed blade portion 32 cooperate with each other and can form a shear force; if a hole of a different shape needs to be expanded, it is only necessary to change the shape of the movable blade portion 41 and the guide hole 31 during mold manufacturing.

[0060] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hole opener with hole expansion function, characterized in that: include: A support component is provided with a material return groove (21), and a fixed knife portion (32) is provided on the upper front side of the support component; A pull rod (1) is passed through the support assembly, and both upper and lower ends of the pull rod (1) extend out of the material withdrawal groove (21); A movable blade (4) is mounted on the upper end of the pull rod (1), and a movable blade portion (41) is protruding from the front side of the movable blade (4); A driving device (9) is mounted on the lower end of the supporting assembly, and the driving device (9) is connected to the lower end of the pull rod (1); The pull rod (1) is pulled by the driving device (9), so that the rear side wall of the movable blade (4) slides in contact with the support assembly, thereby causing the movable blade portion (41) to cooperate with the fixed blade portion (32) to generate a shear force.

2. The hole opener with hole expansion function according to claim 1, characterized in that: The support assembly is provided with a discharge port (22), which is connected to the outside and the material return trough (21) and is used to discharge the sheared waste material out of the material return trough (21).

3. The hole opener with hole expansion function according to claim 2, characterized in that: The support assembly comprises: A guide plate (3) having a guide hole (31) formed thereon, wherein the side wall of the guide hole (31) is provided with the fixed knife portion (32) inwardly; A support seat (2) is installed at the lower end of the guide plate (3), and the support seat (2) is provided with the material withdrawal groove (21) and the material discharge port (22).

4. A hole opener with hole expansion function according to any one of claims 1 to 3, characterized in that: A vertical avoidance groove (211) is provided at a corner of the material return groove (21) for avoiding the corners of the sheared waste.

5. The hole opener with hole expansion function according to claim 1, characterized in that: The front side of the lower end of the movable blade portion (41) is provided with an arc-shaped cutting edge (411); the left and right sides of the lower end of the movable blade portion (41) are both provided with a cutting edge 1 (412), and the cutting edge 1 (412) is arranged obliquely; the connection between the arc-shaped cutting edge (411) and the cutting edge 1 (412) protrudes downward to form a bite tooth (413).

6. The hole opener with hole expansion function according to claim 2, characterized in that: The lower end side wall of the discharge port (22) is arranged to be inclined to form a guide surface (221).

7. The hole opener with hole expansion function according to claim 1, characterized in that: The driving device (9) comprises: A cylinder (5) mounted at the lower end of the support assembly; A piston (6) is slidably mounted in the cylinder body (5) and forms an oil chamber (51) with the cylinder body (5); the upper end of the piston (6) is movably connected to the pull rod (1); the lower end of the piston (6) has a guide rod (61), the guide rod (61) has an oil inlet channel 1 (611), and the piston (6) has an oil inlet channel 2 (612), and the oil inlet channel 2 (612) connects the oil chamber (51) with the oil inlet channel 1 (611); A connecting seat (7) connected to the lower end of the cylinder body (5), the connecting seat (7) being provided with a guide cavity (71), and the guide rod (61) slidingly extends into the guide cavity (71); a spring (8), which is disposed between the connecting seat (7) and the piston (6) and is used to reset the piston (6); A hydraulic mechanism connected to the lower end of the connecting seat (7) and used for conveying hydraulic oil into the guide cavity (71); The hydraulic mechanism delivers hydraulic oil from the oil inlet channel 1 (611) through the oil inlet channel 2 (612) to the oil chamber (51), so that the piston (6) moves in the cylinder body (5), thereby realizing the movement of the pull rod (1).

8. The hole opener with hole expansion function according to claim 7, characterized in that: The upper end of the cylinder body (5) is provided with a mounting hole (52), and the upper end of the piston (6) is provided with a guide column (62). The guide column (62) is slidably placed in the mounting hole (52), and a mounting cavity (621) is provided in the guide column (62). The lower end of the pull rod (1) is installed in the mounting cavity (621), thereby realizing the connection between the piston (6) and the pull rod (1).

9. The hole opener with hole expansion function according to claim 8, characterized in that: The piston (6) is sleeved with a sealing ring 1 (63), the sealing ring 1 (63) abuts against the inner wall of the cylinder body (5), the inner wall of the mounting hole (52) is provided with a sealing ring 2 (53), the sealing ring 2 (53) is sleeved on the guide column (62), and the sealing ring 1 (63) and the sealing ring 2 (53) are used to seal the oil chamber (51).

10. The hole opener with hole expansion function according to claim 8, characterized in that: The guide rod (61) is sleeved with a sealing ring three (64), and the sealing ring three (64) abuts against the inner wall of the guide cavity (71).

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