CN208783241U - A kind of combine harvester stepless speed change device belt hold-down mechanism - Google Patents

Abstract

The utility model discloses a kind of combine harvester stepless speed change device belt hold-down mechanisms, including outer frame body, engine belt pulley is provided on the inside of outer frame body, engine belt pulley is connect by variable speed belt with intermediate speed pulley, intermediate speed pulley also passes through clutch pulley belt and connect with Traction clutch belt pulley, the side of variable speed belt is provided with the first belt and holds down assembly, and the side of clutch pulley belt is provided with the second belt and holds down assembly.The utility model combine harvester stepless speed change device belt hold-down mechanism, it is held down assembly by the first belt and holds down assembly and variable speed belt and clutch pulley belt can be compressed respectively with the second belt, it prevents variable speed belt and clutch pulley belt since rate of tension not enough causes to skid, and then influences combine harvester work to cause combine harvester working efficiency low.

Description

A kind of combine harvester stepless speed change device belt hold-down mechanism

Technical field

The utility model relates to combine harvester technical field, specially a kind of combine harvester stepless speed change device skin Band hold-down mechanism.

Background technique

Currently, combine harvester just develops towards multi-functional, automation, efficient direction.When combine harvester is in field Between operation when, the speed of travel is to restrict its production efficiency and an important factor for operation quality.When with the advance of reasonable speed, joint The work of function full width is gathered in, reaches specified feed quantity, and guarantee harvesting quality, obtains higher production efficiency, travel speed is too Feed quantity can be made excessive fastly, cause clean rate decline, loss late to rise, cause threshing cylinder to block when serious, travel speed mistake It is low that feed quantity can be made too small, reduce productivity, it can be seen that, carrying out control to the speed of travel of harvester is very important.

Existing combine harvester in operation process, generally by operator according to the growth and field conditions of crop with warp It tests and changes speed to adjust feed quantity, the state that hardly possible keeps harvester work relatively high in an efficiency.Therefore, production effect is improved The utilization rate of rate and harvester, it is desirable to which harvester uses advanced automatic control system.Developed country is to combine harvester speed Degree automatic control technology has carried out a large amount of research, and some more advanced combine harvesters have gradually adopted automatic control system System；In China, since the research to advanced technology lacks support, the application of Automatic Control System of Walking Velocity on Combine is also It is fewer.

Traditional combine harvester travel speed is by measurement drive shaft revolving speed and driving wheel diameter calculation, but due to driving Generating between wheel and ground trackslips and drive wheel diameter factors, gained speed and the true row such as to change with load mass size Sailing speed has certain error.

207185262 U of China Patent No. CN discloses combine harvester stepless speed change device, passes through cylinder piston rod It is flexible, position change of the intermediate speed pulley between engine belt pulley and Traction clutch belt pulley can be made, this can To realize variable speed with the principle for changing pulley drive ratio, the walking of combine harvester can be preferably controlled, thus according to The feed quantity of cereal preferably controls speed, to obtain preferably gathering in effect, better system performance.

But combine harvester stepless speed change device speed pulley among the flexible change by cylinder piston rod Position when, since the change of intermediate speed pulley position leads to the elastic of variable speed belt and clutch pulley belt Degree can change, in some instances it may even be possible to which causing variable speed belt and clutch pulley belt, there is a phenomenon where skid thus cannot be fine Carry out speed change, influence combine harvester work, cause combine harvester working efficiency low.

Utility model content

The purpose of this utility model is to provide a kind of combine harvester stepless speed change device belt hold-down mechanisms, pass through First belt, which holds down assembly, to hold down assembly and can carry out respectively to variable speed belt and clutch pulley belt with the second belt It compresses, prevents variable speed belt and clutch pulley belt since rate of tension not enough causes to skid, and then influence joint and receive Cutting mill work solves the problems of the prior art to cause combine harvester working efficiency low.

To achieve the above object, the utility model provides the following technical solutions: a kind of combine harvester stepless speed change device With belt hold-down mechanism, including outer frame body, engine belt pulley, the engine belt pulley are provided on the inside of the outer frame body It is connect by variable speed belt with intermediate speed pulley, the intermediate speed pulley also passes through clutch pulley belt It is connect with Traction clutch belt pulley, the intermediate speed pulley is also hinged with crotch, and the crotch is far from intermediate speed change skin One end of belt wheel is movably connected on the inner wall of outer frame body, and the middle-end of the crotch is connected with oil cylinder, the extension bar of the oil cylinder It is flexibly connected with crotch, the oil cylinder is movably connected on the inner wall of outer frame body far from one end of crotch；

The side of the variable speed belt is provided with the first belt and holds down assembly, and first belt, which holds down assembly, to be passed through First fixed block and the second fixed block are fixed on the inner wall of outer frame body, and the side of the clutch pulley belt is provided with Two belts hold down assembly, and second belt holds down assembly to be fixed in outer frame body by third fixed block and the 4th fixed block On wall；

It includes motor cabinet, motor, screw rod, the first support that first belt, which holds down assembly and holds down assembly with the second belt, Riser, the second support riser, sliding block, guide rod, the first clamping frame, the second clamping frame, shaft and pinch roller, the motor cabinet it is interior Side is equipped with motor, and the output shaft of the motor is connected with screw rod by shaft coupling, and the lower end of the screw rod is arranged with sliding block, institute It states sliding block to connect with wire rod thread, the both sides of the face of the sliding block are respectively connected with guide rod, and the guide rod is far from sliding block One end is separately mounted on the first support riser and the second support riser, and the first support riser and the second support riser are parallel It is arranged on motor cabinet, the sliding block is equipped with the first clamping frame and the second clamping frame far from a side end face of motor cabinet, described The upper end of first clamping frame and the second clamping frame is equipped with shaft, is equipped with pinch roller on the shaft.

Preferably, the sliding slot moved for guide rod is offered on the first support riser and the second support riser.

Preferably, the first support riser and the second support riser are arranged in parallel with screw rod.

Preferably, first clamping frame and the second clamping frame are arranged in parallel within the two sides of screw rod.

Preferably, the pinch roller is flexibly connected on shaft.

Compared with prior art, the beneficial effects of the utility model are as follows:

1, the utility model combine harvester stepless speed change device belt hold-down mechanism pulls fork in the extension bar of oil cylinder Frame makes intermediate speed pulley to during lower swing, and variable speed belt is tensioned, the tensioning of clutch pulley belt Not enough, therefore the first belt holds down assembly and does not work degree, and the second belt holds down assembly work, and motor work drives screw rod rotation, Screw rod moves direction of the sliding block under the support guide effect of guide rod away from motor cabinet, sliding Block away from the direction movement of motor cabinet drive the first clamping frame, the second clamping frame, shaft it is synchronous with pinch roller also away from The direction of motor cabinet moves, until pinch roller compresses clutch pulley belt and keeps the rate of tension of clutch pulley belt suitable, It is unlikely to clutch pulley belt slippage, will not influence combine harvester work, so that work efficiency is high for combine harvester.

2, the utility model combine harvester stepless speed change device belt hold-down mechanism pulls fork in the extension bar of oil cylinder During frame is swung up intermediate speed pulley, clutch pulley belt is tensioned, the tensioning of variable speed belt Not enough, therefore the second belt holds down assembly and does not work degree, and the first belt holds down assembly work, and motor work drives screw rod rotation, Screw rod moves direction of the sliding block under the support guide effect of guide rod away from motor cabinet, sliding Block away from the direction movement of motor cabinet drive the first clamping frame, the second clamping frame, shaft it is synchronous with pinch roller also away from The direction of motor cabinet moves, until pinch roller compresses variable speed belt and keeps the rate of tension of variable speed belt suitable, is unlikely to nothing Grade speed belt skids, and will not influence combine harvester work, so that work efficiency is high for combine harvester.

Therefore, being held down assembly by the first belt, hold down assembly with the second belt can be respectively to variable speed belt and clutch Device pulley belt is compressed, and prevents variable speed belt and clutch pulley belt from not enough causing to beat due to rate of tension It is sliding, and then combine harvester work is influenced to cause combine harvester working efficiency low.

Detailed description of the invention

Fig. 1 is the combine harvester stepless speed change device belt hold-down mechanism schematic diagram of the utility model；

Fig. 2 is that first belt of the utility model holds down assembly enlarged drawing；

Fig. 3 is the side view that pinch roller is installed on the sliding block of the utility model.

In figure: 1, outer frame body；2, engine belt pulley；3, variable speed belt；4, intermediate speed pulley；5, clutch Pulley belt；6, Traction clutch belt pulley；7, crotch；8, oil cylinder；9, the first belt holds down assembly；91, motor cabinet；92, Motor；93, screw rod；94, the first support riser；941, sliding slot；95, the second support riser；96, sliding block；97, guide rod；98, One clamping frame；99, the second clamping frame；910, shaft；911, pinch roller；10, the first fixed block；11, the second fixed block；12, second Belt holds down assembly；13, third fixed block；14, the 4th fixed block.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, a kind of combine harvester stepless speed change device belt hold-down mechanism, including outer frame body 1, outer frame body 1 inside is provided with engine belt pulley 2, and engine belt pulley 2 is connected by variable speed belt 3 and intermediate speed pulley 4 It connects, intermediate speed pulley 4 is also connect by clutch pulley belt 5 with Traction clutch belt pulley 6, intermediate speed belt Wheel 4 is also hinged with crotch 7, and crotch 7 is movably connected on the inner wall of outer frame body 1 far from one end of intermediate speed pulley 4, crotch 7 middle-end is connected with oil cylinder 8, and the extension bar of oil cylinder 8 is flexibly connected with crotch 7, and oil cylinder 8 is flexibly connected far from one end of crotch 7 On the inner wall of outer frame body 1.

The side of variable speed belt 3 is provided with the first belt and holds down assembly 9, and the first belt holds down assembly 9 by first Fixed block 10 and the second fixed block 11 are fixed on the inner wall of outer frame body 1, by the flexible of the extension bar of oil cylinder 8, can make centre Position change of the speed pulley 4 between engine belt pulley 2 and Traction clutch belt pulley 6, this can use change skin The principle of belt wheel transmission ratio realizes variable speed, and when the oil circuit of system control 8 epicoele of oil cylinder is opened, the extension bar of oil cylinder 8 is drawn Moving fork frame 7 makes intermediate speed pulley 4 to lower swing, and intermediate speed pulley 4 increases at a distance from engine belt pulley 2, but It reduces at a distance from Traction clutch belt pulley 6, so the revolving speed of Traction clutch belt pulley 6 increases, makes combine harvester The speed of travel is accelerated, during the extension bar of oil cylinder 8 pulls crotch 7 to make intermediate speed pulley 4 to lower swing, stepless change Fast belt 3 is tensioned, and the rate of tension of clutch pulley belt 5 is inadequate, therefore the first belt holds down assembly and 9 do not work, and second Belt holds down assembly 12 work, and the work of motor 92 drives screw rod 93 to rotate, and screw rod 93 makes sliding block 96 exist during rotation Direction under the support guide effect of guide rod 97 away from motor cabinet 91 moves, side of the sliding block 96 away from motor cabinet 91 Drive the first clamping frame 98, the second clamping frame 99, shaft 910 synchronous with pinch roller 911 also away from motor cabinet 91 to movement Direction movement, until pinch roller 911 compresses clutch pulley belt 5 and keeps the rate of tension of clutch pulley belt 5 suitable, it is unlikely It skids in clutch pulley belt 5, will not influence combine harvester work, so that work efficiency is high for combine harvester, clutch The side of device pulley belt 5 is provided with the second belt and holds down assembly 12, and the second belt holds down assembly 12 by third fixed block 13 and the 4th fixed block 14 be fixed on the inner wall of outer frame body 1, when high pressure oil enters 8 cavity of resorption of oil cylinder, the extension bar of oil cylinder 8 is pushed away Moving fork frame 7 makes to put on intermediate speed pulley 4, and the harvester speed of travel is slack-off, in the extension bar pulling crotch 7 of oil cylinder 8 makes Between during speed pulley 4 is swung up, clutch pulley belt 5 is tensioned, and the rate of tension of variable speed belt 3 is not Enough, therefore the second belt holds down assembly and 12 do not work, the first belt holds down assembly 9 work, and the work of motor 92 drives screw rod 93 to revolve Turn, screw rod 93 makes sliding block 96 under the support guide effect of guide rod 97 away from motor cabinet 91 during rotation Direction movement, sliding block 96 drive the first clamping frame 98, the second clamping frame 99, shaft away from the direction movement of motor cabinet 91 910 is synchronous with pinch roller 911 also away from the direction movement of motor cabinet 91, until pinch roller 911 compresses variable speed belt 3 and makes nothing The rate of tension of grade speed belt 3 is suitable, is unlikely to the skidding of variable speed belt 3, will not influence combine harvester work, so that connection Closing harvester, work efficiency is high.

Please refer to Fig. 2-3, the first belt hold down assembly 9 and second belt to hold down assembly 12 include motor cabinet 91, motor 92, screw rod 93, first supports riser 94, second that riser 95, sliding block 96, guide rod 97, the first clamping frame 98, second is supported to compress Frame 99, shaft 910 and pinch roller 911, the work of motor 92 drive screw rod 93 to rotate, and screw rod 93 makes sliding block 96 during rotation Direction under the support guide effect of guide rod 97 away from motor cabinet 91 moves, and sliding block 96 is away from motor cabinet 91 Direction movement drives the first clamping frame 98, the second clamping frame 99, shaft 910 synchronous with pinch roller 911 also away from motor cabinet 91 Direction movement, until pinch roller 911 compress variable speed belt 3 or clutch pulley belt 5 make variable speed belt 3 or from The rate of tension of clutch pulley belt 5 is suitable, by the first belt hold down assembly 9 and second belt hold down assembly 12 can be right respectively Variable speed belt 3 and clutch pulley belt 5 are compressed, and variable speed belt 3 and clutch pulley belt 5 are prevented Since rate of tension not enough causes to skid, and then influences combine harvester and work to cause combine harvester working efficiency low, electricity The inside of base 91 is equipped with motor 92, and the output shaft of motor 92 is connected with screw rod 93, the lower end cap of screw rod 93 by shaft coupling Equipped with sliding block 96, sliding block 96 is threadedly coupled with screw rod 93, and the both sides of the face of sliding block 96 are respectively connected with guide rod 97, and guide rod 97 is equal One end far from sliding block 96 is separately mounted on the first support riser 94 and the second support riser 95, the first support riser 94 and the The sliding slot 941 moved for guide rod 97 is offered on two support risers 95, the work of motor 92 drives screw rod 93 to rotate, and screw rod 93 exists Direction of the sliding block 96 under the support guide effect of guide rod 97 away from motor cabinet 91 is moved, the One support riser 94 and the second support riser 95 are arranged in parallel on motor cabinet 91, the first support riser 94 and the second support riser 95 is arranged in parallel with screw rod 93, and screw rod 93 makes sliding block 96 support riser 94 in guide rod 97, first during rotation Direction under support guide effect with the second support riser 95 away from motor cabinet 91 moves, and sliding block 96 is far from motor cabinet 91 A side end face the first clamping frame 98 and the second clamping frame 99 are installed, the first clamping frame 98 and the second clamping frame 99 are arranged in parallel In the two sides of screw rod 93, the upper end of the first clamping frame 98 and the second clamping frame 99 is equipped with shaft 910, is equipped on shaft 910 Pinch roller 911, pinch roller 911 are flexibly connected on shaft 910, when pinch roller 911 compresses variable speed belt 3 or clutch pulley skin When band 5, variable speed belt 3 or clutch pulley belt 5 may make 911 synchronous rotary of pinch roller in the course of rotation.

Working principle: by the flexible of the extension bar of oil cylinder 8, intermediate speed pulley 4 can be made in 2 He of engine belt pulley Position change between Traction clutch belt pulley 6, this can realize variable speed with the principle for changing pulley drive ratio, When the oil circuit of system control 8 epicoele of oil cylinder is opened, the extension bar of oil cylinder 8 pulls crotch 7 to make intermediate speed pulley 4 to the bottom Dynamic, intermediate speed pulley 4 increases at a distance from engine belt pulley 2, but it subtracts at a distance from Traction clutch belt pulley 6 It is small, so the revolving speed of Traction clutch belt pulley 6 increases, accelerate Walking Velocity on Combine, is drawn in the extension bar of oil cylinder 8 Moving fork frame 7 makes intermediate speed pulley 4 to during lower swing, and variable speed belt 3 is tensioned, clutch pulley belt 5 rate of tension is inadequate, therefore the first belt holds down assembly and 9 do not work, and the second belt holds down assembly 12 work, 92 work belt of motor Dynamic screw rod 93 rotates, screw rod 93 make during rotation sliding block 96 under the support guide effect of guide rod 97 away from The direction of motor cabinet 91 moves, and sliding block 96 drives the first clamping frame 98, second to compress away from the direction movement of motor cabinet 91 Frame 99, shaft 910 are synchronous with pinch roller 911 also to be moved away from the direction of motor cabinet 91, until pinch roller 911 compresses clutch skin Belt wheel belt 5 keeps the rate of tension of clutch pulley belt 5 suitable, is unlikely to the skidding of clutch pulley belt 5, will not influence Combine harvester work, so that work efficiency is high for combine harvester.

When high pressure oil enters 8 cavity of resorption of oil cylinder, the extension bar of oil cylinder 8 pushes crotch 7 to make to put on intermediate speed pulley 4, The harvester speed of travel is slack-off, during the extension bar of oil cylinder 8 pulls crotch 7 to be swung up intermediate speed pulley 4, Clutch pulley belt 5 is tensioned, and the rate of tension of variable speed belt 3 is inadequate, therefore the second belt holds down assembly 12 not works Make, the first belt holds down assembly 9 work, and the work of motor 92 drives screw rod 93 to rotate, and screw rod 93 to slide during rotation Block 96 moves under the support guide effect of guide rod 97 away from the direction of motor cabinet 91, and sliding block 96 is away from motor cabinet 91 direction movement drives the first clamping frame 98, the second clamping frame 99, shaft 910 synchronous with pinch roller 911 also away from motor The direction movement of seat 91 is unlikely to until pinch roller 911 compresses variable speed belt 3 and keeps the rate of tension of variable speed belt 3 suitable Variable speed belt 3 skids, and will not influence combine harvester work, so that work efficiency is high for combine harvester.

In summary: the utility model combine harvester stepless speed change device belt hold-down mechanism, in the stretching of oil cylinder 8 Bar pulls crotch 7 to make intermediate speed pulley 4 to during lower swing, and variable speed belt 3 is tensioned, clutch pulley The rate of tension of belt 5 is inadequate, therefore the first belt holds down assembly and 9 do not work, and the second belt holds down assembly 12 work, 92 work of motor Make drive screw rod 93 rotate, screw rod 93 make during rotation sliding block 96 guide rod 97 support guide effect under towards Direction far from motor cabinet 91 moves, and sliding block 96 drives the first clamping frame 98, second away from the direction movement of motor cabinet 91 Clamping frame 99, shaft 910 are synchronous with pinch roller 911 also to be moved away from the direction of motor cabinet 91, until pinch roller 911 compresses clutch Device pulley belt 5 keeps the rate of tension of clutch pulley belt 5 suitable, is unlikely to the skidding of clutch pulley belt 5, will not Combine harvester work is influenced, so that work efficiency is high for combine harvester, pulls crotch 7 to make intermediate change in the extension bar of oil cylinder 8 During fast belt pulley 4 is swung up, clutch pulley belt 5 is tensioned, and the rate of tension of variable speed belt 3 is inadequate, Therefore the second belt, which holds down assembly, 12 does not work, and the first belt holds down assembly 9 work, and the work of motor 92 drives screw rod 93 to rotate, Screw rod 93 makes sliding block 96 under the support guide effect of guide rod 97 away from the side of motor cabinet 91 during rotation To movement, sliding block 96 drives the first clamping frame 98, the second clamping frame 99, shaft 910 away from the direction movement of motor cabinet 91 It is synchronous with pinch roller 911 also away from motor cabinet 91 direction move, until pinch roller 911 compress variable speed belt 3 make it is stepless The rate of tension of speed belt 3 is suitable, is unlikely to the skidding of variable speed belt 3, will not influence combine harvester work, so that joint Work efficiency is high for harvester, by the first belt hold down assembly 9 and second belt hold down assembly 12 can be respectively to variable speed skin Band 3 and clutch pulley belt 5 are compressed, and prevent variable speed belt 3 and clutch pulley belt 5 due to rate of tension Not enough cause to skid, and then influences combine harvester work to cause combine harvester working efficiency low.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of combine harvester stepless speed change device belt hold-down mechanism, including outer frame body (1), it is characterised in that: described Be provided on the inside of outer frame body (1) engine belt pulley (2), the engine belt pulley (2) by variable speed belt (3) with The connection of intermediate speed pulley (4), the intermediate speed pulley (4) also by clutch pulley belt (5) and walk from Clutch belt pulley (6) connection, the intermediate speed pulley (4) are also hinged with crotch (7), and the crotch (7) becomes far from intermediate One end of fast belt pulley (4) is movably connected on the inner wall of outer frame body (1), and the middle-end of the crotch (7) is connected with oil cylinder (8), The extension bar of the oil cylinder (8) is flexibly connected with crotch (7), and the oil cylinder (8) is flexibly connected outside far from the one end of crotch (7) On the inner wall of framework (1)；

The side of the variable speed belt (3) is provided with the first belt and holds down assembly (9), and first belt holds down assembly (9) it is fixed on the inner wall of outer frame body (1) by the first fixed block (10) and the second fixed block (11), the clutch pulley The side of belt (5) is provided with the second belt and holds down assembly (12), second belt hold down assembly (12) fixed by third Block (13) and the 4th fixed block (14) are fixed on the inner wall of outer frame body (1)；

It includes motor cabinet (91), motor (92), silk that first belt, which holds down assembly (9), and the second belt holds down assembly (12) Bar (93), first support riser (94), second support riser (95), sliding block (96), guide rod (97), the first clamping frame (98), Second clamping frame (99), shaft (910) and pinch roller (911) are equipped with motor (92), the electricity on the inside of the motor cabinet (91) The output shaft of machine (92) is connected with screw rod (93) by shaft coupling, and the lower end of the screw rod (93) is arranged with sliding block (96), described Sliding block (96) is threadedly coupled with screw rod (93), and the both sides of the face of the sliding block (96) are respectively connected with guide rod (97), the guiding Bar (97) one end far from sliding block (96) is separately mounted on the first support riser (94) and the second support riser (95), described First support riser (94) and the second support riser (95) are arranged in parallel on motor cabinet (91), and the sliding block (96) is far from motor One side end face of seat (91) is equipped with the first clamping frame (98) and the second clamping frame (99), first clamping frame (98) and second The upper end of clamping frame (99) is equipped with shaft (910), is equipped with pinch roller (911) on the shaft (910).

2. a kind of combine harvester stepless speed change device belt hold-down mechanism according to claim 1, it is characterised in that: The sliding slot (941) for guide rod (97) movement is offered in first support riser (94) and the second support riser (95).

3. a kind of combine harvester stepless speed change device belt hold-down mechanism according to claim 1, it is characterised in that: First support riser (94) and the second support riser (95) are arranged in parallel with screw rod (93).

4. a kind of combine harvester stepless speed change device belt hold-down mechanism according to claim 1, it is characterised in that: First clamping frame (98) and the second clamping frame (99) are arranged in parallel within the two sides of screw rod (93).

5. a kind of combine harvester stepless speed change device belt hold-down mechanism according to claim 1, it is characterised in that: The pinch roller (911) is flexibly connected on shaft (910).