CN107507508A - A kind of gear generating-instrument - Google Patents

Abstract

A kind of gear generating-instrument, including chassis, lower slide carriage, upper slide carriage, drawing pallet, hour hand, increasing stop block and tooth plate, drawing is positioned with hour hand, and the platen backing plate fixed to stud and nut compresses drawing, reduces error；Drawing pallet and rolling circle disk are arranged to two independent parts, control drawing pallet with rolling circle disk separately or in combination, the relative position of drawing and tooth plate can be made arbitrarily to change, add the diversity of experiment by the change in location for increasing stop block；Draw in flank profil line process, correct arrangement and the position of regulation drawing and tooth plate, the whole flank profil line of gear can be drawn out, make the expression of gear more vivid, directly perceived.

Description

A new gear fan forming instrument

technical field

The invention belongs to the technical field of gear forming instruments, in particular to a novel gear forming instrument.

Background technique

Gear Fan Chengyi is a teaching aid for demonstrating the principle of Fan Cheng's method of manufacturing involute gears. It helps students understand the machining process of involute gear tooth profile more intuitively and concretely, and at the same time enables students to understand the reasons for gear undercutting and the methods to avoid undercutting.

However, there are some problems in the present several gear fan Chengyi, which are not easy to operate. Most of the gear fans on the market use the threaded connection at the center of the circle to locate and compress the drawings. In order to match the studs with a certain diameter, the drawings need to cut holes at the center of the circle, which is very easy to cut and cause errors; the drawing tray and the base circle of the gear The disk is integrated, and when the drawing needs to be continued on the rest of the drawing, it is very troublesome to loosen and move the drawing, and the length of the sliding plate is limited, so only part of the tooth profile can be drawn, which is not enough image.

Contents of the invention

In order to solve the above technical problems, the present invention provides a new gear fan forming instrument.

The technical solution of the present invention is: a new gear fan forming instrument, including a chassis, a lower slide plate and an upper slide plate. Underframe, the lower slide plate includes a transverse dovetail protrusion on the lower surface, a radial dovetail protrusion on the upper surface, a U-shaped hole in the middle, a front rack connecting plate and an adjusting bolt through hole. The horizontal dovetail protrusion matched with the dovetail groove is connected with the lower slide plate, and the upper slide plate includes the radial dovetail groove matched with the radial dovetail protrusion, the tooth plate positioning hole inserted with the tooth plate positioning shaft and the adjusting short shaft There is a threaded hole for matching with the adjusting bolt under the adjusting short shaft. One end of the adjusting bolt has an annular groove and is stuck in the U-shaped hole, and the other end passes through the threaded hole under the adjusting short shaft to approach the adjusting bolt. through holes, the rack connecting plate is fixedly connected with a rack, and the upper surface of the upper slide plate is provided with a tooth plate that cooperates with the positioning shaft of the tooth plate.

A gear-based disk that cooperates with the rack is arranged above the bottom frame. The upper surface of the gear tooth portion of the gear-based disk is a downwardly inclined slope. One end of the bottom frame is provided with a vertical The center of the gear base disc is provided with a hole that is concentric with the central axis hole of the chassis and has the same diameter. A drawing tray is arranged above the gear base disc, and the drawing tray includes a downwardly protruding and gear base plate. The boss on the upper surface of the disc and the disc on the upper surface and the lower surface of the tooth plate, the diameter of the boss of the drawing tray is smaller than the diameter of the gear base disc,

The lower surface of the disc of the drawing tray is provided with several rectangular grooves extending to the inner side of the gear base disc from the outside to the inside. The rectangular grooves of the drawing tray are provided with a resistance increasing block with a slope on the right bottom and a The stopper of the guide rod hole and the limit rod groove, the right side of the resistance increasing block extends between the gear base disc and the drawing tray so that the slope at the bottom of the resistance increasing block contacts the slope above the gear base disc, so The left side of the resistance increasing block is provided with a guide rod, the end of the guide rod is provided with a semicircular protrusion, and the side near the end is provided with a downward limit rod, and the semicircular protrusion of the guide rod The starting diameter is smaller than the diameter of the guide rod hole but larger than the diameter of the limit rod hole. The stopper is connected with the resistance increasing block through the guide rod and the limit rod respectively matched with the guide rod hole and the limit rod groove, and the stopper is fixed. In the rectangular groove of the drawing tray, a spring in a compressed state is arranged on the guide rod between the stop block and the resistance block.

The center of the drawing tray is provided with a stepped shaft hole with a one-way bearing inside. The inner hole of the one-way bearing and the central axis hole of the chassis are concentric and have the same diameter. A central axis is inserted into the center hole and the central axis hole of the bottom frame. A short needle is inserted into the upper end of the central axis and has an outwardly extending edge. The threaded holes of the base frame and the central axis are selected into matching screws, and the upper surface of the disc of the drawing tray is provided with a paper plate that is fixed with the drawing tray through studs and nuts.

Preferably, the lower surface of the disk of the drawing tray is provided with two symmetrical rectangular grooves extending to the inner side of the gear base disk from the outside to the inside.

Preferably, the paper pressing backing plate has a ring-shaped structure.

Preferably, the one-way bearing is a one-way needle bearing.

The beneficial effects of the present invention are:

A new type of gear fan forming instrument of the present invention uses short needles to position the drawings, and presses the drawings with the paper pads fixed by studs and nuts, which reduces the error; the drawing tray and the gear base disc are arranged in two The independent part controls the separation or combination of the drawing tray and the gear base disc through the position change of the resistance increasing block, so that the relative position of the drawing and the tooth plate can be changed arbitrarily, which increases the diversity of experiments; in the process of drawing the tooth profile, By correctly arranging and adjusting the position of the drawing and the tooth plate, all the tooth profiles of the gear can be drawn, making the expression of the gear more vivid and intuitive.

Description of drawings

Fig. 1 is one of three-dimensional structure schematic diagrams of the present invention;

Fig. 2 is the second three-dimensional structure schematic diagram of the present invention;

Fig. 3 is a schematic front view of the present invention;

Fig. 4 is A-A sectional view of Fig. 3;

Fig. 5 is a schematic top view of the present invention;

Fig. 6 is the B-B sectional view of Fig. 5;

Fig. 7 is a partially enlarged schematic diagram of Fig. 6;

Figure 8 is a schematic bottom view of the present invention;

Fig. 9 is a schematic left view of the present invention;

Fig. 10 is a three-dimensional schematic diagram of a partial structure of the present invention;

Fig. 11 is a three-dimensional schematic diagram of a partial structure of the present invention;

In the figure: 1. Chassis, 2. Lower sliding plate, 3. Upper sliding plate, 4. Adjusting short shaft, 5. Adjusting bolt, 6. Gear plate, 7. Gear plate positioning shaft, 8. Rack, 9. Gear Base disc, 10. drawing tray, 11. resistance block, 12. stopper, 13. one-way bearing, 14. center shaft, 15. short needle, 16. press paper backing plate;

101. Bottom plate, 102. Underframe, 201. Transverse dovetail protrusion, 202. Radial dovetail protrusion, 203. U-shaped hole, 204. Rack connecting plate, 205. Adjusting bolt through hole.

detailed description

The specific embodiment of the present invention is shown in Fig. 1-11, a new gear fan forming instrument, including a chassis 1, a lower sliding plate 2 and an upper sliding plate 3, characterized in that the chassis 1 includes a bottom plate with a transverse dovetail groove on the upper surface 101 and a triangular underframe 102 with a central axis hole, the lower slide plate 2 includes a transverse dovetail protrusion 201 on the lower surface, a radial dovetail protrusion 202 on the upper surface, a U-shaped hole 203 in the middle, and front teeth The strip connecting plate 204 and the adjusting bolt hole 205, the bottom plate 101 is connected with the lower slide plate 2 through the horizontal dovetail protrusion 201 matched with the transverse dovetail groove, and the upper slide plate 3 includes a radial dovetail protrusion 202 matched The radial dovetail groove, the tooth plate 6 positioning hole inserted with the tooth plate positioning shaft 7, and the adjusting short shaft hole inserted with the adjusting short shaft 4, there is a threaded hole matching the adjusting bolt 5 under the adjusting short shaft 4, and the adjustment One end of the bolt 5 has an annular groove and is stuck in the U-shaped hole 203, and the other end passes through the threaded hole below the adjusting short shaft 4 to approach the adjusting bolt through hole 205, and the rack connecting plate 204 is fixedly connected with the rack 8. The upper surface of the upper slide plate 3 is provided with a tooth plate 6 cooperating with the tooth plate positioning shaft 7,

The bottom frame 102 is provided with a gear base disc 9 that cooperates with the rack 8. The upper surface of the gear tooth part of the gear base disc 9 is a slope inclined downward. One end of the base frame 102 is provided with a vertical and through Through the threaded hole of the central axis hole, the center of the gear base disc 9 is provided with a hole concentric with the central axis hole of the chassis 102 and has the same diameter. A drawing tray 10 is arranged above the gear base disc 9, and the drawing tray 10 comprises the boss that protrudes downward and fits the upper surface of the gear base disc 9 and the disc that the upper surface above fits the lower surface of the tooth plate 6, and the diameter of the boss of the drawing tray 10 is smaller than The diameter of the gear base disc 9,

The lower surface of the disk of the drawing tray 10 has several rectangular grooves extending to the inner side of the gear base disk 9 from the outside to the inside, and the rectangular groove of the drawing tray 10 is provided with a resistance-increasing block whose bottom surface is a slope on the right side. 11 and the stopper 12 that is provided with the guide rod hole and the limit rod groove, the right side of the said resistance increasing block 11 stretches between the gear base disc 9 and the drawing tray 10 so that the inclined plane at the bottom of the resistance increasing block 11 and the gear The inclined surface above the base disc 9 is in contact with, and the left side of the resistance increasing block 11 is provided with a guide rod, and the end of the guide rod is provided with a semicircular protrusion, and a downward limit is provided near the end rod, the diameter of the semicircular protrusion of the guide rod is smaller than the diameter of the guide rod hole but greater than the diameter of the limit rod hole, and the stopper 12 passes through the guide rod, which is matched with the guide rod hole and the limit rod groove respectively. The limit rod is connected with the resistance increasing block 11, the stop block 12 is fixed in the rectangular groove of the drawing tray 10, and the spring in the compressed state which is passed on the guide rod is arranged between the stop block 12 and the resistance increasing block 11,

The center of the drawing tray 10 is provided with a stepped shaft hole in which a one-way bearing 13 is housed. 1. A central axis 14 is inserted into the hole in the center of the gear base disc 9 and the central axis hole of the chassis 102. The upper end of the central axis 14 is inserted with a short needle 15 and has an outwardly extending edge. The bottom of the central axis 14 is provided with The same and concentric threaded holes as the diameter of the threaded holes on the underframe 102 are selected into matching screws in the threaded holes of the underframe 102 and the central axis 14, and the upper surface of the disk of the drawing tray 10 is provided with a The tray 10 is fixed by a stud and a nut to hold the platen plate 16 .

Preferably, the lower surface of the disc of the drawing tray 10 is provided with two symmetrical rectangular grooves extending to the inner side of the gear base disc 9 from the outside to the inside.

Preferably, the paper platen 16 has a circular structure.

Preferably, the one-way bearing 13 is a one-way needle bearing.

When in use, position the drawing with the short needle 15, tie the center of the drawing circle directly on the short needle 15, press the paper backing plate 16 against the drawing, and fix it with studs and nuts; adjust the tooth plate 6 to a suitable position with the adjusting bolt 5 position, the resistance increasing block 11 is clamped between the drawing tray 10 and the gear base disc 9 under the elastic force of the spring in the compressed state, so that the drawing tray 10 and the gear base disc 9 rotate synchronously, when the tooth plate 6 runs to the limit position, pull out the resistance increasing block 11, and pull the limit rod on the guide rod of the increasing resistance block 11 out of the limit rod groove, so that the increasing resistance block 11 is separated from the gear base disc 9, and at the same time, the increasing resistance block The limit rod on the guide rod of 11 is stuck on the outer surface of the stopper 12. At this time, the tooth plate 6 is returned to the place where it coincides with the original tooth profile, and the tooth profile is continued to be drawn, and so on until the starting point of the tooth profile Merge with the end point.

Claims (4)

1. a kind of gear generating-instrument, including chassis, lower slide carriage and upper slide carriage, it is characterised in that the chassis includes upper table Face is provided with the bottom plate of horizontal dovetail groove and is provided with the chassis of the triangle of central axis hole, and the lower slide carriage includes the horizontal swallow of lower surface Tail projection, the radial direction dovetail tangs of upper surface, middle U-shaped hole, the rack connecting plate and regulating bolt via in front, the bottom By being connected with the horizontal dovetail tangs that horizontal dovetail groove coordinates with lower slide carriage, the upper slide carriage includes and radial direction dovetail tangs plate The radial direction dovetail groove of cooperation, the tooth plate positioning hole for being inserted with tooth plate locating shaft and the regulation short axle hole for being inserted with regulation short axle, regulation are short Be provided with the screwed hole coordinated with regulating bolt below axle, described regulating bolt one end be provided with annular groove be stuck in U-shaped hole, the other end Through the screwed hole below regulation short axle close to regulating bolt via, the rack connecting plate is fixedly connected with rack, it is described on The upper surface of slide carriage is provided with the tooth plate coordinated with tooth plate locating shaft,

Be provided with the rolling circle disk coordinated with rack above chassis, the gear tooth portions upper surface of the rolling circle disk be to Under inclined inclined-plane, described chassis one end is provided with vertical and penetrates to the screwed hole of central axis hole, rolling circle disk center and set There is and diameter identical hole concentric with the central axis hole of chassis, drawing pallet, the drawing are provided with above the rolling circle disk Pallet includes the boss being bonded with the upper surface of rolling circle disk and the upper surface of top and the lower surface of tooth plate extended downwardly from The disk of fitting, the diameter of the boss of the drawing pallet are less than the diameter of rolling circle disk,

The lower surface ecto-entad of the disk of the drawing pallet is provided with several rectangular channels extended on the inside of rolling circle disk, Increasings stop block that right side bottom surface is inclined-plane is provided with the rectangular channel of the drawing pallet and is provided with guide rod hole and gag lever post groove Block, described increase extend between rolling circle disk and drawing pallet the inclined-plane and gear base for making increasing stop block bottom on the right side of stop block Contact of incline plane above disk, described increase are provided with guide rod on the left of stop block, the end of the guide rod is provided with semi-cylindrical hill, leaned on Close end side is provided with downward gag lever post, and the diameter of the semi-cylindrical hill of the guide rod is less than the diameter of guide rod hole but more than limit The diameter of position rod aperture, the block are connected by guide rod, the gag lever post coordinated respectively with guide rod hole, gag lever post groove with increasing stop block, Block is fixed in the rectangular channel of drawing pallet, in block and is increased and is provided with to be through on guide rod and is in compressive state between stop block Spring,

The drawing tray center is provided with the internal stair-stepping axis hole that unilateral bearing is housed, the endoporus and chassis of unilateral bearing Central axis hole it is concentric and diameter is identical, inserted in the endoporus, the hole of rolling circle disk center, the central axis hole of chassis in unilateral bearing There is axis, the upper end of axis is inserted with hour hand and is provided with and the screw thread on chassis with the edge to stretch out, the axis bottom The identical and concentric screwed hole of bore dia, the screw being engaged, the drawing pallet are selected into the screwed hole of chassis and axis The upper surface of disk be provided with the platen backing plate for passing through stud and nut with drawing pallet and fixing.

2. a kind of gear generating-instrument according to claim 1, it is characterised in that under the disk of the drawing pallet Surface ecto-entad is provided with two symmetrical rectangular channels extended on the inside of rolling circle disk.

3. a kind of gear generating-instrument according to claim 1, it is characterised in that the platen backing plate is annular knot Structure.

4. a kind of gear generating-instrument according to claim 1, it is characterised in that the unilateral bearing is unidirectional needle roller Bearing.