CN208495898U - Mini-tiller reverses gear axis machining apparatus - Google Patents

Abstract

The utility model belongs to part manufacture field, a kind of mini-tiller is specifically disclosed to reverse gear axis machining apparatus, rack is equipped with clamping unit, groove milling unit and workbench, clamping unit includes the clamping bar being slidably connected on the rack, and sleeve is slidably connected on clamping bar, and sleeve lining is equipped with groove, voussoir is slidably connected in groove, several clamping jaws are circumferentially hinged on sleeve, clamping jaw is equipped with strip groove, is fixed with convex block in rack；Groove milling unit includes the shaft of rotation connection on the rack, and shaft top is equipped with ball screws and is threaded with nut, and nut is fixed on the rack, and shaft lower end is fixed with milling cutter；Cam is rotatably connected in rack, slide bar upper end and cam outer wall are slidably matched；Shaft is equipped with first bevel gear, and clamping bar is equipped with second bevel gear, unilateral bearing is equipped between second bevel gear and clamping bar.Using the embodiment of the utility model, solve the problems, such as in mini-tiller reverse shaft circumferential direction groove milling.

Description

Mini-tiller reverses gear axis machining apparatus

Technical field

The utility model belongs to agricultural equipment parts machining field, and in particular to a kind of mini-tiller reverse gear shaft processing dress It sets.

Background technique

Mini-tiller has light-weight, small in size, the features such as structure is simple, can be traveled freely in field, mix corresponding machine Have the operations such as can also be drawn water, be generated electricity, sprayed, sprayed, eliminating large-scale farm machinery cannot be introduced into the worry of mountain area field, It is the cultivated optimal selection of mountain area substitution ox.

Gear box of micro-cultivator is mini-tiller important component, and performance directly influences mini-tiller overall performance.It is micro- to plough Machine gearbox assembly structure is: being connected directly between engine and gearbox by ring flange, power passes through wet friction clutch Device or conical surface friction clutch are directly delivered in gearbox, there is three kinds of axis such as main shaft, countershaft, reverse gear shaft in gearbox.Pass through Stir main shaft, the duplex spur gear position on reverse gear shaft, it can be achieved that fast shelves, slow shelves and reverse gear shift, then pass through two groups of right cones It outputs power after gear wheel reversing, deceleration.

Wherein, mini-tiller reverse gear shaft, which is connected by key, is fixed on speed change chamber interior wall, in order to guarantee connective stability, reverses gear Circumferentially arranged with multiple keyways to fix with speed change chamber interior wall on axis, in processing, every milling for completing a keyway is required Manual rotation's reverse gear shaft, and the processing of next keyway is positioned again, it processes multiple keyways and just needs multiple bearing, this Sample not only makes the processing efficiency of reverse shaft extremely low, while also not can guarantee the precision of keyway processing.

Utility model content

It reverses gear axis machining apparatus the purpose of this utility model is to provide a kind of mini-tiller, it is automatic during groove milling to meet Rotate the requirement of reverse gear shaft.

In order to achieve the above objectives, the base case of the utility model are as follows: mini-tiller reverses gear axis machining apparatus, including rack, Rack is equipped with clamping unit, groove milling unit and workbench, and clamping unit includes the clamping bar being slidably connected on the rack, folder Sleeve is slidably connected on tight bar, sleeve lining is equipped with groove, and voussoir is slidably connected in groove, and clamping bar is equipped with for wedge The wedge slot that block is caught in is fixed with the first spring between voussoir and bottom portion of groove, voussoir has magnetism, and bottom portion of groove is equipped with for arranging Denounce the first electromagnet of voussoir；Several clamping jaws for being used to clamp reverse gear shaft are circumferentially hinged on sleeve, clamping jaw is equipped with bar shaped Slot, convex block is fixed in rack, and convex block is inserted into strip groove；Groove milling unit includes the shaft of rotation connection on the rack, shaft Top is equipped with ball screws and is threaded with nut, and nut is fixed on the rack, and shaft lower end is fixed with milling cutter；Rack is upper It is fixedly arranged above motor in shaft, cam is fixed on motor output shaft, slidably connects slide bar in rack, slide bar upper end and convex Wheel outer wall is slidably matched, the lower end of the slider and the rotation connection of shaft upper end；Shaft upper spline is connected with first bevel gear, the first cone tooth Wheel is rotatably connected in rack, and clamping bar is equipped with the second bevel gear engaged with first bevel gear, second bevel gear and clamping Unilateral bearing is installed, the number of teeth of first bevel gear is more than the number of teeth of second bevel gear between bar.

The working principle of this base case is:

To workbench direction sliding sleeve, sleeve drives clamping jaw to move to close to axis direction of reversing gear, and strip groove is by convex block Position-limiting action clamps reverse gear shaft.When original state, voussoir is located in groove by the effect of the first spring, when clamping jaw clamps reverse gear shaft When, start the first electromagnet, the first electromagnet repels voussoir and is caught in wedge slot.Setting voussoir and wedge slot, the wedge surface of voussoir have Guiding performance is easy to be caught in wedge slot.Sleeve and clamping bar are fixed, and clamping jaw and reverse gear shaft are fixed, and realize the fixation to reverse gear shaft, can To carry out following process to reverse gear shaft.

The rotation of motor driven cam, cam and slide bar form cam mechanism, and according to the kinetic characteristic of cam mechanism, slide bar is done The linear reciprocating motion of upper and lower direction.When slide bar moves downward, shaft is pushed to move downward, shaft and nut composition be not self-locking Ball screw assembly, nut is fixed on the rack, and nut can not rotate, therefore, rotating forward while shaft moves downward.Milling cutter with Shaft is moved downward and is rotated forward, the groove milling on reverse gear shaft of the cutting force of milling cutter.At this point, shaft drives first bevel gear to rotate forward, the One bevel gear drives second bevel gear reversion, and second bevel gear is acted on clamping bar by unilateral bearing and dallied, and clamping bar does not turn It is dynamic.

When slide bar moves upwards, shaft moves upwards reset therewith, and according to the kinetic characteristic of ball screw assembly, shaft is driven Reversion while milling cutter moves upwards.Shaft drives first bevel gear reversion, and first bevel gear drives second bevel gear to rotate forward, the Plug tap gear drives clamping bar rotation, and clamping bar drives reverse gear shaft to rotate next operating position.

Due to keyway depth be it is fixed, then it is certain that shaft, which drives the distance that moves downward of milling cutter, and passes through cam Mechanism moves downward shaft, by the way that the shape of cam is arranged, can determine the distance that shaft moves downward.Pass through ball wire The transmission of thick stick pair, shaft move downward one timing of distance, and the circle number of shaft rotation is fixed.Shaft drives first bevel gear to turn Dynamic circle number is fixed, and the number of teeth of first bevel gear is more than the number of teeth of second bevel gear, first bevel gear and second bevel gear Transmission ratio is not 1, then the circle number of shaft rotation can be determined by the screw pitch of setting nut and ball screws, due to the first cone The circle number of gear rotation is determining, and gear-driven precision is higher, then can determine the angle that second bevel gear rotates every time It spends, even if unilateral bearing is when driving clamping bar rotation, there are certain errors, but are somebody's turn to do since the rotation of each unilateral bearing all exists Error still can guarantee that the angle of each clamping bar rotation is equal.Clamping bar rotation drives reverse gear shaft rotation, due to clamping bar The angle rotated every time is equal, then the slot milled out is evenly distributed on reverse gear shaft, and precision is higher.

The beneficial effect of this base case is:

1, by the setting of unilateral bearing, when shaft drives milling cutter to move downward, the fixed reverse gear shaft of clamping bar；It completes the process After one keyway, when shaft drives milling cutter to reset, clamping bar drives reverse gear shaft to turn an angle, and can process next milling Slot.In the present apparatus, after completing the process a keyway reverse gear shaft is rotated automatically, is not required to staff and rotates reverse gear shaft, reduce Labor intensity.

2, ball screws are secondary in the present apparatus and the transmission of first bevel gear, second bevel gear, and clamping bar can be made every The secondary angle for driving reverse gear shaft rotation is equal, then the slot milled out is evenly distributed on reverse gear shaft, and does not need multiple bearing, can To guarantee higher precision.

Further, cooling unit is additionally provided in rack, cooling unit includes the liquid reserve tank being fixed on above cam, liquid reserve tank It is equipped with fluid hole, slidably connects the baffle for blocking fluid hole in liquid reserve tank at fluid hole, baffle is equipped with can With the through-hole being overlapped with fluid hole, baffle lower end is fixed with connecting rod, and connecting rod lower end is slided through liquid reserve tank bottom and with cam outer wall Dynamic cooperation, is communicated with outlet tube at fluid hole, and the opening of outlet tube free end is towards milling cutter.

The utility model has the advantages that cam and connecting rod form cam mechanism, cam rotation drives connecting rod to do vertical linear reciprocating motion, And link motion direction is identical with pivot direction.When shaft drives milling cutter to move downward groove milling, connecting rod is also moved downward, even Bar drives baffle slide downward, and through-hole and fluid hole are overlapped, cutting fluid by fluid hole discharge, cutting fluid by gravity along Outlet tube is discharged on milling cutter, is cooled down to milling cutter.

Further, drying unit is additionally provided in rack, drying unit includes the piston bucket being arranged on the outside of clamping bar, is clamped Bar runs through the end face of piston bucket, and piston bucket is slidably connected on the rack, is threaded with piston on piston bucket inner wall, piston is fixed On clamping bar, piston bucket end face is equipped with venthole, is communicated with escape pipe, and the free end opening direction of escape pipe at venthole Workbench.

The utility model has the advantages that clamping bar rotation drives piston rotation, the rotation of piston opposing pistons bucket, piston bucket is slidably connected at machine On frame, rack limits piston bucket, and piston bucket can not rotate.Piston bucket is connected with piston thread, according to the fortune of screw thread pair Dynamic characteristic, piston bucket opposing pistons slide, and space reduces in piston bucket, and the gas in piston bucket is discharged by escape pipe, will mill Remaining iron filings blowout in good slot, and reverse gear shaft is cooled down.

Further, outlet tube end is fixed on the rack.

The utility model has the advantages that rack limits escape pipe, escape pipe is avoided to move with piston bucket to separate reverse gear shaft, So that the opening of escape pipe can be directed at reverse gear shaft always.

Further, outlet tube is bellows, and link block is slidably connected in rack, and the cross section of link block is rectangle, even It connects and is equipped with mounting hole in the middle part of block, inner wall of the hole installing is equipped with limiting slot in a ring, and shaft and mounting hole are rotatablely connected, in shaft Equipped with stop collar, stop collar is caught in limiting slot, and outlet tube is fixed on link block.

The utility model has the advantages that link block can not be rotated by the position-limiting action of rack, while link block is by the position-limiting action of stop collar, Upper and lower movement is done with shaft.Bellows is set, using the expansion performance of bellows, bellows moves above and below with link block, So that the opening and milling cutter of bellows maintain a certain distance, guarantee that cutting fluid is all sprayed on milling cutter.And as milling cutter is transported downwards Dynamic distance increases, and the milling cutter working time increases, and the cutting thermal change of generation is more, and bellows is also moved downward and is stretched, bellows Internal diameter becomes smaller, and according to bernoulli principle, the cutting flow velocity in bellows increases, and speed of the cutting fluid spray on milling cutter becomes Fastly, cooling effect is more preferable.

Detailed description of the invention

Fig. 1 is the schematic diagram of the utility model embodiment；

Fig. 2 is the enlarged diagram of part A in Fig. 1；

Fig. 3 is the enlarged diagram of part B in Fig. 1；

Fig. 4 is the right view of bracket and placement ring in Fig. 1；

Fig. 5 is the enlarged diagram of C portion in Fig. 1；

Fig. 6 is the enlarged diagram of the part D in Fig. 1.

Specific embodiment

It is further described below by specific embodiment:

Appended drawing reference in Figure of description includes: cam 1, liquid reserve tank 2, connecting rod 3, baffle 4, fluid hole 5, through-hole 6, slides Bar 7, shaft 8, first bevel gear 9, second bevel gear 10, nut 11, milling cutter 12, clamping bar 13, piston bucket 14, piston 15, set Cylinder 16, reverse gear shaft 18, bracket 19, places ring 20, convex block 21, clamping jaw 22, link block 23, stop collar 24, voussoir at strip groove 17 25, groove 26, fixture block 27, second spring 28.

As shown in Figure 1,18 processing unit (plant) of mini-tiller reverse gear shaft, including rack, rack are equipped with clamping unit, groove milling list Member, cooling unit, drying unit and workbench are transversely equipped with several brackets 19, as shown in connection with fig. 4, bracket on workbench 19 upper ends are fixed with the placement ring 20 of semicircular in shape.Clamping unit includes the clamping bar 13 being slidably connected on the rack, clamping bar Sleeve 16 is slidably connected on 13, as shown in connection with fig. 3,16 inner wall of sleeve is equipped with groove 26, slidably connects wedge in groove 26 Block 25, clamping bar 13 are equipped with the wedge slot being caught in for voussoir 25, and voussoir 25 and groove are fixed with the first spring, wedge between 26 bottom Block 25 has magnetism, the electricity that 26 bottom of groove is equipped with the first electromagnet for repelling voussoir 25 and is powered for the first electromagnet Source.The upper and lower two sides of sleeve 16 are hinged with clamping jaw 22, strip groove 17 are equipped on clamping jaw 22,17 right end of strip groove is to close to folder Axial direction tilts in tight bar 13, and convex block 21 is fixed in rack, and convex block 21 is inserted into strip groove 17.

Groove milling unit includes the shaft 8 of rotation connection on the rack, and 8 top of shaft is equipped with ball screws and is threaded with Nut 11, nut 11 are fixed on the rack, and 8 lower end of shaft is fixed with milling cutter 12.It is located at shaft 8 in rack and is fixedly arranged above electricity Machine is fixed with cam 1 on motor output shaft, and slide bar 7 is slidably connected in rack, and 7 upper end of slide bar and the sliding of 1 outer wall of cam are matched It closes, 7 lower end of slide bar and the rotation connection of 8 upper end of shaft.8 upper spline of shaft is connected with first bevel gear 9, and first bevel gear 9 rotates On the rack, clamping bar 13 is equipped with the second bevel gear 10 engaged with first bevel gear 9, second bevel gear 10 and clamping for connection Unilateral bearing is installed, the number of teeth of first bevel gear 9 is more than the number of teeth of second bevel gear 10 between bar 13.

Cooling unit includes the liquid reserve tank 2 for being fixed on 1 top of cam, and liquid reserve tank 2 is equipped with fluid hole 5, position in liquid reserve tank 2 The baffle 4 for blocking fluid hole 5 is slidably connected at fluid hole 5, baffle 4 is logical equipped with what can be overlapped with fluid hole 5 Hole 6,4 lower end of baffle are fixed with connecting rod 3, and 3 lower end of connecting rod is slidably matched through 2 bottom of liquid reserve tank and with 1 outer wall of cam, fluid hole It is communicated with outlet tube at 5, the opening of outlet tube free end is towards milling cutter 12.Outlet tube is bellows, is slidably connected in rack Link block 23, the cross section of link block 23 are rectangle, and as shown in connection with fig. 2, link block 23 includes left piece to be connected together and the right side Block, the left piece of left mounting hole equipped with semicircular in shape, the right piece of right mounting hole equipped with semicircular in shape, left mounting hole and right installation Hole is stitched together, and forms the through-hole 6 passed through for shaft 8.It is in semiorbicular left limit slot that left inner wall of the hole installing, which is equipped with, right It is in semiorbicular right limit slot that inner wall of the hole installing, which is equipped with, and shaft 8 is equipped with stop collar 24, left limit slot and the splicing of right limit slot It is caught in together for stop collar 24, outlet tube is fixed on link block 23.

Drying unit includes the piston bucket 14 that 13 outside of clamping bar is arranged in, and clamping bar 13 runs through the end face of piston bucket 14, Rack is equipped with lateral sliding rail, as shown in fig. 6, piston bucket 14 is equipped with card slot, slidably connects fixture block 27, fixture block in card slot 27 are slidably connected in sliding rail, and second spring 28 is fixed between fixture block 27 and card slot bottom, and fixture block 27 has magnetism, card slot bottom The power supply that portion is equipped with the second electromagnet for repelling fixture block 27 and is powered for the second electromagnet.When second electromagnet starts, Fixture block 27 is caught in sliding rail, and piston bucket 14 is avoided to rotate, and when the second electromagnet is closed, fixture block 27 is acted on by second spring 28 and being slid into In card slot, the effect of the unrestricted position of piston bucket 14 can be rotated or be slided relative to clamping bar 13.It is threadedly coupled on 14 inner wall of piston bucket There is piston 15, piston 15 is fixed on clamping bar 13, and 14 end face of piston bucket is equipped with venthole, is communicated with outlet at venthole Pipe, the end of escape pipe free end is fixed on the rack, and the free end opening of escape pipe is towards workbench.

When specific works, reverse gear shaft 18 to be processed is placed on and is placed on ring 20, bracket 19 props up reverse gear shaft 18 Support.When original state, voussoir 25 is located in groove 26 by the effect of the first spring, staff sliding sleeve 16 to the right, sleeve 16 Clamping jaw 22 is driven to move right, strip groove 17 is clamped 18 left end of reverse gear shaft, at this point, staff by the position-limiting action of convex block 21 Start the first electromagnet, the first electromagnet repels voussoir 25, and voussoir 25 is moved to close wedge slot direction and is caught in wedge slot.Sleeve 16 and clamping bar 13 it is fixed, clamping jaw 22 and reverse gear shaft 18 are fixed, realize the fixation to reverse gear shaft 18, can start to reverse gear shaft 18 Carry out following process.

Start motor, motor driven cam 1 rotates, and cam 1 and slide bar 7 form cam mechanism, according to the fortune of cam mechanism Dynamic characteristic, slide bar 7 do the linear reciprocating motion of upper and lower direction.When the lug boss of cam 1 rotates down, slide bar 7 is moved downward, Shaft 8 is pushed to move downward, shaft 8 and nut 11 form not self-locking ball screw assembly, and nut 11 is fixed on the rack, nut 11 can not rotate, therefore, rotating forward while shaft 8 moves downward.Shaft 8 drives milling cutter 12 to move downward while rotating forward, mills The groove milling on reverse gear shaft 18 of the cutting force of knife 12.Meanwhile shaft 8 drives first bevel gear 9 to rotate forward, first bevel gear 9 drives the The reversion of two bevel gears 10, second bevel gear 10 are acted on by unilateral bearing and being dallied, and clamping bar 13 does not rotate.

Cam 1 and connecting rod 3 also form cam mechanism, and the rotation of cam 1 drives connecting rod 3 to do vertical linear reciprocating motion, and 3 direction of motion of connecting rod is identical with 8 direction of motion of shaft.When shaft 8 drives milling cutter 12 to move downward groove milling, connecting rod 3 is also transported downwards Dynamic, connecting rod 3 drives 4 slide downward of baffle.As shown in figure 5, cutting fluid is by going out liquid when through-hole 6 and fluid hole 5 are gradually overlapped Hole 5 is discharged, and cutting fluid is discharged on milling cutter 12 along outlet tube by gravity, is cooled down to milling cutter 12.Due to link block 23 can not be rotated by the position-limiting action of rack, while link block 23 is done upper and lower fortune with shaft 8 by the position-limiting action of stop collar 24 It is dynamic.Outlet tube moves above and below with link block 23, so that the opening of outlet tube and milling cutter 12 maintain a certain distance, guarantees to cut Liquid is cut all to be sprayed on milling cutter 12.

When the lug boss of cam 1 is rotated up, slide bar 7 is moved upwards, and shaft 8 moves upwards reset therewith, according to ball The kinetic characteristic of lead screw pair, reversion while shaft 8 drives milling cutter 12 to move upwards.Shaft 8 drives first bevel gear 9 to invert, First bevel gear 9 drives second bevel gear 10 to rotate forward, and second bevel gear 10 drives clamping bar 13 to rotate, and the drive of clamping bar 13 is reversed gear Axis 18 rotates.

Meanwhile the rotation band piston 15 of clamping bar 13 rotates, the rotation of 15 opposing pistons bucket 14 of piston starts the second electromagnetism Iron, fixture block 27 skid off card slot and are located in sliding rail, fixture block 27 by sliding rail position-limiting action so that piston bucket 14 can not rotate.Piston Bucket 14 and piston 15 are threadedly coupled, and according to the kinetic characteristic of screw thread pair, 14 opposing pistons 15 of piston bucket are slided to the right, piston bucket 14 Interior space reduces, and the gas in piston bucket 14 is discharged by escape pipe, and iron filings remaining in the slot milled are blown out, and to Gear shaft 18 is cooled down.

Keyway on reverse gear shaft 18 is circumferential after processing is completed, closes motor.The first electromagnet is closed, voussoir 25 is by the first bullet The reset response of spring slides back in groove 26, and sliding sleeve 16, sleeve 16 drive clamping jaw 22 to move downward to staff to the left, unclamps Reverse gear shaft 18, staff can remove reverse gear shaft 18.Close the second electromagnet, reset response of the fixture block 27 by second spring 28 It slides back in card slot, staff rotates piston bucket 14, so that piston bucket 14 slides reset to the left.

Above-described is only the embodiments of the present invention, and the common sense such as well known specific structure and characteristic are herein in scheme It does not describe excessively.It should be pointed out that for those skilled in the art, in the premise for not departing from the utility model structure Under, several modifications and improvements can also be made, these also should be considered as the protection scope of the utility model, these all will not influence The effect and patent practicability that the utility model is implemented.

Claims (5)

1. The axis machining apparatus 1. mini-tiller reverses gear, including rack, it is characterised in that: rack be equipped with clamping unit, groove milling unit with And workbench, clamping unit include the clamping bar being slidably connected on the rack, and sleeve, sleeve lining are slidably connected on clamping bar Be equipped with groove, slidably connect voussoir in groove, clamping bar is equipped with the wedge slot being caught in for voussoir, voussoir and bottom portion of groove it Between be fixed with the first spring, voussoir has magnetism, and bottom portion of groove is equipped with the first electromagnet for repelling voussoir；Along week on sleeve Several for clamping the clamping jaw of reverse gear shaft to being hinged with, clamping jaw is equipped with strip groove, and convex block is fixed in rack, and convex block is inserted into item In shape slot；

   Groove milling unit includes the shaft of rotation connection on the rack, and shaft top is equipped with ball screws and is threaded with nut, Nut is fixed on the rack, and shaft lower end is fixed with milling cutter；It is located at shaft in rack and is fixedly arranged above motor, on motor output shaft It is fixed with cam, slide bar is slidably connected in rack, slide bar upper end and cam outer wall are slidably matched, the lower end of the slider and shaft upper end Rotation connection；Shaft upper spline is connected with first bevel gear, and first bevel gear is rotatablely connected on the rack, clamping bar be equipped with The second bevel gear of first bevel gear engagement, is equipped with unilateral bearing between second bevel gear and clamping bar, first bevel gear The number of teeth is more than the number of teeth of second bevel gear.
2. The axis machining apparatus 2. mini-tiller according to claim 1 reverses gear, it is characterised in that: be additionally provided in rack cooling single Member, cooling unit include the liquid reserve tank being fixed on above cam, and liquid reserve tank is equipped with fluid hole, is located at fluid hole in liquid reserve tank The baffle for blocking fluid hole is slidably connected, baffle is equipped with the through-hole that can be overlapped with fluid hole, and baffle lower end is fixed There is connecting rod, connecting rod lower end is slidably matched through liquid reserve tank bottom and with cam outer wall, and outlet tube, outlet tube are communicated at fluid hole The opening of free end is towards milling cutter.
3. The axis machining apparatus 3. mini-tiller according to claim 1 reverses gear, it is characterised in that: be additionally provided in rack dry single Member, drying unit include the piston bucket being arranged on the outside of clamping bar, and clamping bar runs through the end face of piston bucket, and piston bucket is slidably connected On the rack, it is threaded with piston on piston bucket inner wall, piston is fixed on clamping bar, and piston bucket end face is equipped with ventilation Hole, is communicated with escape pipe at venthole, and the free end opening of escape pipe is towards workbench.
4. The axis machining apparatus 4. mini-tiller according to claim 3 reverses gear, it is characterised in that: the outlet tube end is fixed on In rack.
5. The axis machining apparatus 5. mini-tiller according to claim 2 reverses gear, it is characterised in that: the outlet tube is bellows, Slidably connect link block in rack, the cross section of link block is rectangle, mounting hole is equipped in the middle part of link block, in inner wall of the hole installing Equipped with limiting slot in a ring, shaft and mounting hole rotation connection, shaft are equipped with stop collar, and stop collar is caught in limiting slot, Outlet tube is fixed on link block.