Die for punching key groove in hole

Abstract

A die for punching key grooves in holes relates to the technical field of key groove machining devices and comprises a bottom plate, a sliding groove is fixedly connected to the bottom plate, a sliding rod is slidably connected into the sliding groove, and a driving sliding mechanism is arranged at one end of the sliding rod. The other end of the sliding rod is detachably connected with a fixing shaft, a turning tool is slidably inserted into the fixing shaft, a screw is further in threaded connection with the interior of the fixing shaft, the end of one side of the screw is rotationally connected into the turning tool, the other side of the screw extends out of the fixing shaft, and a driving rotating mechanism is arranged on the bottom plate. According to the die for punching the key groove in the hole, the turning tool is inserted into the fixing shaft in a sliding mode, in the reciprocating motion process of the fixing shaft, after the gear and the rack are connected and meshed, the gear and the screw rod are driven to rotate, then the turning tool can be driven to move transversely, and the number of meshing and connecting times of the gear and the rack is controlled; therefore, the transverse moving distance of the turning tool can be controlled, the depth of the machined key groove can be automatically controlled, and the machining efficiency can be improved. Manual control over overall movement of the mold to machine the key groove is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of keyway processing devices, and more specifically to a die for punching a keyway in a hole. Background Art

[0002] In the process of hardware processing and production, many parts need to be punched with keyways in the holes, such as gear parts that need to have keyways punched in the inner holes before they can be installed on the shafts; existing keyway punching molds, such as the Chinese patent with announcement number CN201920123812.3, disclose an extra-long inner hole keyway drawing machine, which drives the broach to reciprocate through a servo motor and gears, and can then perform groove processing on the inner hole. Although the current in-hole keyway punching mold can punch the inner hole very well, the depth of the punching groove requires manual movement of the entire mold, which in turn drives the broach to move horizontally, and then controls the depth of the punching groove. The punching process is relatively cumbersome, and the depth of the punching groove cannot be automatically controlled, and requires manual adjustment; therefore, in response to this situation, the utility model cleverly proposes a mold for punching keyways in holes to solve the deficiencies in the above technical background. Utility Model Content

[0003] The utility model aims to solve the problem that the tool in the existing hole keyway punching die needs to be manually moved and adjusted during the keyway punching process to control the depth of the keyway punching, and the process is relatively cumbersome and inefficient.

[0004] The purpose and effect of a mold for punching a key groove in a hole in the utility model are achieved by the following specific technical means: a mold for punching a key groove in a hole, comprising a base plate, a slide groove is fixedly connected to the base plate, a slide rod is slidably connected in the slide groove, a driving sliding mechanism is provided at one end of the slide rod, and the driving sliding mechanism is used to drive the slide rod to slide back and forth; a fixed shaft is detachably connected to the other end of the slide rod, a turning tool is slidably inserted in the fixed shaft, and a screw is also threadedly connected in the fixed shaft, one end of the screw is rotatably connected in the turning tool, and the other side extends to the outside of the fixed shaft, and a driving rotation mechanism is provided on the base plate, and the driving rotation mechanism is used to drive the screw to rotate.

[0005] Furthermore, the fixed shaft is fixed to the end of the sliding rod by using screws.

[0006] Furthermore, the driving sliding mechanism includes a disc, which is rotatably connected to the bottom plate. The disc is driven to rotate by a driving motor, and a connecting rod is hinged at the edge of the upper surface of the disc, and the other end of the connecting rod is hinged on the sliding rod.

[0007] Furthermore, a plurality of through holes are provided on the connecting rod, and the connecting rod is hinged on the disc by using pins.

[0008] Furthermore, a plurality of oil channels are provided in the slide groove, and an oil inlet is provided above the slide groove. One end of the oil channels converges at the oil inlet, and the other end of the oil channels extends to the side of the slide rod, and a cover is buckled at the oil inlet.

[0009] Furthermore, the driving rotation mechanism includes a gear, the part of the screw located outside the fixed shaft is fixedly connected to a coaxial gear, and a movable block is vertically slidably connected to the base plate, a permanent magnet is fixedly connected below the movable block, and an electromagnet is fixedly connected to the base plate below the permanent magnet, and the electromagnet and the permanent magnet are arranged at intervals; a rack is fixedly connected to the upper side of the movable block, and the rack and the gear are arranged correspondingly. After the movable block moves upward, the gear first meshes with the rack when passing through it, and then the gear separates from the rack after rotation.

[0010] Furthermore, a resettable core rod is slidably inserted in the screw rod, a top block is fixedly connected to the outer end of the core rod, and the inner end of the core rod extends into the turning tool, and a reversing cavity is provided in the turning tool, and a plurality of limit blocks evenly distributed in a circumference are fixedly connected to the side of the inner end of the core rod, and a limit groove corresponding to the limit block is provided in the turning tool; a top connecting strip is fixedly connected to the movable block, slopes are provided on both sides of the top connecting strip, and the top connecting strip and the top block are provided in correspondence, and the top block is pushed forward after being connected to the top connecting strip, driving the limit block to separate from the limit groove.

[0011] Furthermore, the edge of the limiting block is chamfered.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a die for punching a keyway in a hole, wherein a turning tool is slidably inserted in a fixed shaft, and during the reciprocating movement of the fixed shaft, after the gear is connected and meshed with the rack, the gear and the screw are driven to rotate, and then the turning tool can be driven to move laterally, and the number of times the gear is meshed with the rack can be controlled, and then the distance of the lateral movement of the turning tool can be controlled, and then the depth of the keyway can be automatically controlled, thereby improving the processing efficiency and avoiding manual control of the overall movement of the mold to process the keyway. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic top view of the utility model as a whole.

[0015] Figure 2 For this utility model Figure 1 A magnified schematic diagram of center A.

[0016] Figure 3 For this utility model Figure 1 A magnified schematic diagram of point B in the middle.

[0017] Figure 4 It is a schematic diagram of the cooperation between the gear and the rack of the utility model.

[0018] Figure 5It is a structural schematic diagram of the limit block of the utility model.

[0019] Figure 1-5 In: 1-bottom plate, 2-disc, 3-connecting rod, 301-through hole, 4-sliding rod, 5-sliding groove, 501-oil channel, 6-fixed shaft, 7-turning tool, 8-latch pin, 9-cover, 10-screw, 11-gear, 12-live block, 13-rack, 14-top block, 15-core rod, 16-reversing cavity, 17-limit block, 18-top connecting strip, 19-electromagnet, 20-permanent magnet. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] like Figures 1 to 5 As shown: a die for punching a keyway in a hole, comprising a base plate 1, which is arranged on a lathe for punching a keyway, and the lathe is also provided with a three-jaw chuck, which is used to clamp a corresponding gear 11, a hollow shaft or other hardware that needs to punch a keyway; a slide groove 5 is fixedly connected to the base plate 1, a slide rod 4 is slidably connected in the slide groove 5, and a driving sliding mechanism is provided at one end of the slide rod 4, and the driving sliding mechanism is used to drive the slide rod 4 to slide back and forth; a fixed shaft 6 is detachably connected to the other end of the slide rod 4, and a turning tool 7 is inserted into the fixed shaft 6, and the turning tool 7 is used for punching a keyway in the inner hole. Specifically, the fixed shaft 6 can be The screw is fixed to the end of the slide rod 4 through a detachable fixed shaft 6, so that keyways of different widths can be punched out by replacing the fixed shaft 6 with turning tools 7 of different widths; specifically, the turning tool 7 is slidably inserted on one side of the fixed shaft 6, and the other side of the fixed shaft 6 is threadedly connected with a screw rod 10, one end of the screw rod 10 is rotatably connected to the turning tool 7, and the other side extends to the outside of the fixed shaft 6, and a driving rotation mechanism is provided on the base plate 1, which drives the screw rod 10 to rotate by driving the rotating mechanism, thereby adjusting the lateral movement of the turning tool 7, and thereby controlling the depth of the keyway punched by the turning tool 7.

[0022] Among them, Figure 1 As shown, the driving sliding mechanism includes a disc 2, which is rotatably connected to the base plate 1. The disc 2 is driven to rotate by a driving motor. Specifically, the driving motor can be a servo motor or a stepping motor. A connecting rod 3 is hinged at the edge of the upper surface of the disc 2, and the other end of the connecting rod 3 is hinged on the sliding rod 4. The driving motor drives the disc 2 to rotate, thereby driving the connecting rod 3 to pull the sliding rod 4 to slide back and forth.

[0023] Preferably, Figure 1As shown, a plurality of through holes 301 are provided on the connecting rod 3, and the connecting rod 3 is hinged on the disc 2 using a pin 8; by setting the through holes 301 at different positions, the position of the hinge point between the connecting rod 3 and the disc 2 can be changed by using the pin 8, thereby changing the reciprocating sliding stroke length of the sliding rod 4, and thereby punching key slots of different lengths.

[0024] Among them, Figure 2 As shown, a plurality of oil passages 501 are provided in the slide groove 5, and an oil inlet is also provided above the slide groove 5. One end of the oil passages 501 converges at the oil inlet, and the other end of the oil passages 501 extends to the side of the slide rod 4. A sealing cover 9 is buckled at the oil inlet. Lubricating oil is added through the oil inlet, and the lubricating oil seeps through the oil passages 501 to the surface of the slide rod 4, and then can lubricate the slide rod 4 and the slide groove 5, so that the slide rod 4 can slide more smoothly in the slide groove 5.

[0025] Among them, Figures 1 to 5 As shown, the driving rotation mechanism includes a gear 11, the part of the screw 10 located outside the fixed shaft 6 is fixedly connected to the coaxial gear 11, and a movable block 12 is vertically slidably connected to the bottom plate 1, and a permanent magnet 20 is fixedly connected below the movable block 12. An electromagnet 19 is also fixedly connected to the bottom plate 1 below the permanent magnet 20, and the electromagnet 19 is spaced apart from the permanent magnet 20. By changing the direction of the current connected to the electromagnet 19, its magnetic pole is changed, and then the permanent magnet 20 and the movable block 12 can be controlled to move upward or downward; the movable block 12 A rack 13 is fixedly connected to the upper side, and the rack 13 is correspondingly arranged with the gear 11. When the fixed shaft 6 moves back and forth, the gear 11 is driven to move back and forth horizontally. When the gear 11 moves back, the electromagnet 19 is energized to drive the movable block 12 to move upward. In this process, the gear 11 is connected and meshed with the rack 13, and then the gear 11 is driven to rotate through the rack 13 until the rack 13 and the gear 11 are separated again. In this process, the gear 11 rotates a certain angle, which can drive the screw 10 to rotate a certain angle. The screw 1 0 rotation drives the turning tool 7 to move horizontally for a certain distance, and then it can slowly move horizontally to punch the keyway of the inner hole; when the gear 11 is separated from the rack 13, the electromagnet 19 is turned on in the reverse direction, and then the movable block 12 and the rack 13 can be driven to move downward, so that when the fixed shaft 6 moves outward, the gear 11 will not be connected with the rack 13; the reciprocating movement of the fixed shaft 6 drives the gear 11 to move back and forth, and the number of times the rack 13 and the gear 11 are meshed and connected is controlled in this process, so as to control the distance of the lateral movement of the turning tool 7, and then the depth of the keyway punching of the turning tool 7 can be automatically controlled, so as to avoid the problem of manual movement of the entire mold, low precision and complicated steps; when the position of the turning tool 7 needs to be reset, it is only necessary to control the power-on time of the electromagnet 19, so that when the gear 11 moves back, it first passes through the rack 13, and then the electromagnet 19 is turned on, and the gear 11 is meshed and connected with the rack 13 in the process of moving outward, so that the gear 11 can rotate in the opposite direction, and then the turning tool 7 can be reset by rotating the screw 10.

[0026] Preferably, Figures 3 to 5 As shown, a resettable core rod 15 is slidably inserted in the screw rod 10, a top block 14 is fixedly connected to the outer end of the core rod 15, and the inner end of the core rod 15 extends into the turning tool 7, and a reversing cavity 16 is provided in the turning tool 7, a plurality of circumferentially evenly distributed limit blocks 17 are fixedly connected to the side of the inner end of the core rod 15, and a limit groove corresponding to the limit block 17 is provided in the turning tool 7, and the limit block 17 is clamped in the limit groove, thereby limiting the rotation of the core rod 15, and the turning tool 7 is provided with a plurality of circumferentially evenly distributed limit blocks 17, and the turning tool 7 is provided with a limit groove corresponding to the limit block 17, and the limit block 17 is clamped in the limit groove, thereby limiting the rotation of the core rod 15, and the turning tool 7 is provided with a plurality of circumferentially evenly distributed limit blocks 17 ... The rotation of the gear 11 can be restricted in one step; specifically, a reset spring can be arranged between the top block 14 and the gear 11 to realize the sliding reset function of the core rod 15; a top connecting bar 18 is fixedly connected to the movable block 12, and slopes are arranged on both sides of the top connecting bar 18, and the top connecting bar 18 is arranged corresponding to the top block 14. When the fixed shaft 6 drives the gear 11 to move, the top block 14 on the core rod 15 is first connected with the top connecting bar 18, and then drives the core rod 15 to slide, so that the core rod 15 The limit block 17 on the tool 7 is separated from the limit groove in the turning tool 7, and the limit block 17 enters the reversing cavity 16 and can rotate at will. After that, the gear 11 is meshed with the rack 13, and then the gear 11 can be driven to rotate a certain angle. Specifically, four limit blocks 17 can be set on the side of the core rod 15, and the gear 11 is fixedly rotated 90° after passing the rack 13. After the gear 11 is separated from the rack 13, the top block 14 is also separated from the top connecting bar 18. Under the action of the reset spring, the core rod 15 is reset, driving the limit block 17 to be clamped into the limit groove, and the gear 11 no longer rotates at this time; through the setting of the core rod 15, the limit block 17 and the limit groove, the rotation of the gear 11 when it is not meshed with the rack 13 can be limited, and the rotation angle accuracy of the gear 11 can be controlled at the same time, so that the gear 11 rotates a fixed angle, and then the lateral movement distance accuracy of the screw rod 10 after rotation can be controlled, thereby improving the accuracy of the keyway depth of the inner hole.

[0027] The edge of the limiting block 17 is chamfered to facilitate the limiting block 17 to be inserted into the limiting groove.

Claims

1. A die for punching a keyway in a hole, comprising a base plate (1), characterized in that: The bottom plate (1) is fixedly connected with a slide groove (5), a slide rod (4) is slidably connected in the slide groove (5), one end of the slide rod (4) is provided with a driving sliding mechanism, the driving sliding mechanism is used to drive the slide rod (4) to slide back and forth; the other end of the slide rod (4) is detachably connected with a fixed shaft (6), a turning tool (7) is slidably inserted in the fixed shaft (6), and a screw rod (10) is also threadedly connected in the fixed shaft (6), one end of the screw rod (10) is rotatably connected to the turning tool (7), and the other end extends out of the fixed shaft (6); the bottom plate (1) is provided with a driving rotation mechanism, the driving rotation mechanism is used to drive the screw rod (10) to rotate.

2. A die for punching a keyway in a hole according to claim 1, characterized in that: The fixed shaft (6) is fixedly connected to the end of the sliding rod (4) by means of screws.

3. A die for punching a keyway in a hole according to claim 1, characterized in that: The driving sliding mechanism comprises a disc (2), the disc (2) is rotatably connected to the base plate (1), the disc (2) is driven to rotate by a driving motor, and a connecting rod (3) is hinged at the edge of the upper surface of the disc (2), and the other end of the connecting rod (3) is hinged on the sliding rod (4).

4. A die for punching a keyway in a hole according to claim 3, characterized in that: The connecting rod (3) is provided with a plurality of through holes (301), and the connecting rod (3) is hinged to the disc (2) using a pin (8).

5. A die for punching a keyway in a hole according to claim 1, characterized in that: A plurality of oil passages (501) are provided in the slide groove (5), and an oil inlet is also provided above the slide groove (5). One end of the oil passages (501) converges at the oil inlet, and the other end of the oil passages (501) extends to the side of the slide rod (4). A sealing cover (9) is buckled at the oil inlet.

6. A die for punching a keyway in a hole according to claim 1, characterized in that: The driving rotation mechanism comprises a gear (11), a portion of the screw rod (10) located outside the fixed shaft (6) is fixedly connected to a coaxial gear (11), a movable block (12) is vertically slidably connected to the bottom plate (1), a permanent magnet (20) is fixedly connected below the movable block (12), an electromagnet (19) is fixedly connected to the bottom plate (1) below the permanent magnet (20), and the electromagnet (19) and the permanent magnet (20) are arranged at intervals; a rack (13) is fixedly connected to the upper side of the movable block (12), the rack (13) and the gear (11) are arranged correspondingly, and after the movable block (12) moves upward, the gear (11) first meshes with the rack (13) when passing through it, and then the gear (11) is separated from the rack (13) after rotation.

7. A die for punching a keyway in a hole according to claim 6, characterized in that: A repositionable core rod (15) is slidably inserted in the screw rod (10), a top block (14) is fixedly connected to the outer end of the core rod (15), and the inner end of the core rod (15) extends into the turning tool (7), and a reversing cavity (16) is provided in the turning tool (7), and a plurality of circumferentially evenly distributed limiting blocks (17) are fixedly connected to the side of the inner end of the core rod (15), and a limiting groove corresponding to the limiting blocks (17) is provided in the turning tool (7); a top connecting bar (18) is fixedly connected to the movable block (12), and slopes are provided on both sides of the top connecting bar (18), and the top connecting bar (18) and the top block (14) are arranged correspondingly, and the top block (14) is pushed after being connected to the top connecting bar (18), thereby driving the limiting block (17) to separate from the limiting groove.

8. A die for punching a keyway in a hole according to claim 7, characterized in that: The edge of the limit block (17) is provided with a chamfer.

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