CN2437871Y

CN2437871Y - Upper offset crank block reciprocating pedal driving device

Info

Publication number: CN2437871Y
Application number: CN 00244373
Authority: CN
Inventors: 庾国荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-06
Filing date: 2000-09-06
Publication date: 2001-07-04
Anticipated expiration: 2010-09-06

Abstract

The utility model relates to an upper offset crank block reciprocating pedal driving device; a driving shaft with a driving wheel is matched in a shaft sleeve tube by a rolling bearing structure and is arranged on a bed frame; a pair of parallel guide structures on which slide block structures connected with pedal structures are respectively matched are arranged on the bed frame, and the slide block structures can reciprocate on the pedal structures; drive connection structures are arranged between the slide block structures and a driving shaft. Both axial ends of the driving shaft g in opposite linear states are respectively provided with a crank structure; the guide structures are arranged above the driving shaft in an upper offset away. Two slide block structures respectively form drive connection with the distant end of the crank structure at the same side by a hinge structure and a rigid connection structure which are arranged on the two slide block structures.

Description

The reciprocal pedaling type drive unit of upper offset crank block

The utility model relates to a kind of manually driven drive unit of using, particularly a kind of drive unit that drives in the reciprocal mode of scrunching, but priority application in various with the manually driven vehicle in.

Notification number is Chinese patent literatures such as CN 2317164Y and CN 2389833Y, has all introduced the drive unit with reciprocal pedaling type work, can be used for bicycle, tricycle etc. with the manually driven vehicle.Its basic structure principle is that vehicle frame or pedestal are provided with through rolling bearing structure and are matched with live axle in the pipe spreader, has on it and the drive wheel that can drive chain etc. cooperates; On vehicle frame or pedestal, also be provided with the guide structure of pair of guide rails isoline type, be combined with respectively on it with scrunch structure be connected and can be reciprocating thereon about two slide block structures, be in transmission connection through appropriate configuration such as free wheel devicees respectively between two slide block structures and live axle, the to-and-fro motion of slide block structure is converted into rotatablely moving of live axle, and drive wheel such as sprocket wheel on it is exported rotational motion again.This kind structural type is ripe, and conversion transmission efficiency height, but owing to must be respectively between the to-and-fro motion of its two side slide and live axle be in transmission connection through separately free wheel device, just can make the free returning movement of its actuation movement of finishing trace respectively and return, a thereby greatest problem of this whole device existence, what this live axle in the device can not be done to swing to exactly freely turns round entirely, when being applied on the vehicles such as bicycle, tricycle, be exactly that vehicle is difficult to swing to freely implementation, bring very big inconvenience to use.For this reason, though can be solved by adding mechanisms such as reverse clutch again, comparatively complicated apparatus is structurally more complicated obviously can to make this, has also increased the programmed sequence of operations when using simultaneously, and can reduce the unfailing performance of whole device relatively.

To-and-fro motion is converted to the another kind of common mode that rotatablely moves, and as being widely used at present in the device such as various internal-combustion engines, is the slidercrank mechanism that adopts no biased form.Its structural feature is that the movement locus of gyration center and the slide block that does reciprocating linear motion of the crank that rotates is on the same rectilinear direction, i.e. the mode of zero offset.The movement locus of this crank up center and slide block is characteristics of zero offset form structure, be exactly " dead point " that mechanism has two symmetrical position states at work, driving torque when crank is in this two " dead point " position is zero, and promptly the sense of rotation of crank when these 2 positions becomes uncertain.For making the mechanism can be by the formula operation of setting, must dispose the inertial flywheel that adds or take to increase means such as gear inertia on the rotary main shaft, make mechanism can cross this " dead point " position smoothly.Simultaneously,, also need to dispose additional starting drive, to guarantee that mechanism can normally start for overcoming the startup difficulty that causes when this two " dead point " is in the initial position of mechanism.

Given this, the purpose of this utility model is to provide a kind of improvement structure for addressing the above problem, promptly have upper offset slide crank block structured and live the drive unit of pedaling type again, it was both simplified the structure, complete that whole device can realize swinging to easily freely turned round, and overcome in the running situation that has " dead point " effectively.

The structure of the reciprocal pedaling type drive unit of the utility model upper offset crank block, still pedestal is provided with through rolling bearing structure and is matched with the live axle that has drive wheel in the pipe spreader, also be provided with the guide structure of pair of parallel on the pedestal, be combined with respectively on it and scrunch that structure is connected and can reciprocating slide block structure thereon, and the structure that is in transmission connection between this slide block structure and live axle.Wherein sentence and be the reverse linear state and respectively be provided with a crank structure in the axial two side ends of live axle, guide structure is arranged at the top of live axle in the mode of upper offset, and two slide block structures are in transmission connection with the structure that is rigidly connected with the hinging structure of distal end portion on it of the crank structure of its homonymy respectively.

In the said structure, said guide structure and setting slide block structure thereon, the structure of the form that is slidingly matched that can adopt existing at present report and use, also can adopt as being the structure of the rolling fit form that passes through block pulley group slide block structure reported of the Chinese patent literature of CN 2389833Y at notification number, that is: making guide structure is the bow-shaped cross-section rigidity stripe shape member with three different direction stress surfaces, and cooperating slide block structure thereon is the slide block structure that is provided with the block pulley group form of roller structure at three direction places correspondingly.The structure that is rigidly connected between said slide block structure and crank structure distal end portion can adopt various forms of link rod structure spares commonly used.Slide block structure and this hinging structure that is rigidly connected and is connected between structure, and the distal end portion of crank structure and this hinging structure that is rigidly connected and is connected between structure, except that can adopting present hinging structure with the sliding bearing fit form, can also make its structural member that all is adopted as the rolling bearing form, make therebetween to cooperate for the rolling form.The results showed, make the Offset of said guide structure above live axle in the said structure be crank structure effectively work moment 0.5-1 doubly, particularly making this Offset is crank structure when effectively working 0.8-0.9 times of moment, and its transmission conversion efficiency will be more satisfied.When motion that each motive position in the structure all adopts rolling form member to roll to cooperate or swing, be significant to the raising of transmission efficiency.For example through preliminary surveying, when adopting the hinging structure of block pulley group structure slide block and sliding bearing form, the mechanical efficiency value of said apparatus is about 94%; After changing wherein hinging structure into the rolling bearing form, its mechanical efficiency can reach about 97%.The use of rolling structure can also reduce the motion of mechanism pair to lubricated requirement, thereby can make mechanism clean more, also can significantly reduce its running noises simultaneously.

Be appreciated that from said structure, because the slide block structure of above biased form setting drives the live axle rotation through structures that is rigidly connected such as connecting rods by crank structure, between reciprocating slide block structure and live axle, no longer need to be provided for the free wheel device of unidirectional transmission, thereby make live axle in the utility model said apparatus all can carry out clog-free freely turn round entirely at forward with oppositely.When being applied in the vehicle such as bicycle, the user can be the same with the bicycle that uses the traditional crank form, can make arbitrarily forward as required easily and ride or swing to implementation.On the other hand, find out by also knowing the analysis of its movement process, the rotating center that makes the movement locus of the slide block structure that does reciprocating linear motion along guide structure and live axle is not on same rectilinear direction, but be arranged on the top of live axle in the mode that maintains certain upper offset distance after, no matter the slide block structure of both sides is in the driving process of trace, still in the return process of return, the structure that is rigidly connected that the crank structure of its both sides is connected with it not only can not be in the dead point state of same linear position at any time simultaneously, and be that the structure that is rigidly connected that the crank structure when a side is connected with it is when moving to this " dead point " location status, the structure that is rigidly connected that the crank structure of opposite side is connected with it must be the actuation movement state that is in trace, and is to be under the location status that can have big driving torque.Thereby need not to add any additional structure and just can make it autonomous reliably by the formula work that sets, solved the existing motion dead unit problem of present crank block driving structure effectively.The simplification of structure has also reduced the requirement to assembling and maintenance, has also improved the reliability of work simultaneously, makes driving or starts all lighter.In addition, it can also be seen that by job analysis the slide block crank structure of this upper offset form, the speed of slide block structure in the utility model device in being in return return process will be in the movement velocity of the slide block structure in the trace driving process simultaneously greater than opposite side, promptly has anxious characteristic of returning, the total length of its backhaul is greater than the total length of the trace motion of setting, and its backhaul to put in place to the poor journey of trace start position be operation automatically, this characteristic will help the reciprocal alternate cycles acting of this slide block structure.Above-mentioned drive unit of the present utility model is by the acting in conjunction of the greater efficiency and the mechanical transmission aspect greater efficiency of human-computer interaction coupling aspect, its real output can be higher more than 2 times than the bicycle driving power of traditional crank form, will be more laborsaving when promptly travelling with speed, or when imposing identical driving force, can obtain the higher speed of a motor vehicle.

Below foregoing of the present utility model is described in further detail with embodiment shown in the drawings.But this should be interpreted as that the scope of the utility model foregoing only limits to following example.

Fig. 1 is a kind of structural representation of the reciprocal pedaling type drive unit of the utility model upper offset crank block.

Fig. 2 is the plan structure schematic representation of Fig. 1.

Fig. 3～Fig. 6 is the working procedure motion analysis schematic representation of Fig. 1 device.

Illustrated in figures 1 and 2 is a kind of reciprocal pedaling type drive unit of upper offset crank block that is applied on the bicycle, pedestal 4 is provided with the central actuating shaft 12 in rolling bearing structure 14 is matched with axis sleeve pipe 15, is fixed with at one side end place and to drive the drive sprocket 13 that the flywheel work is in transmission connection through chain 11.Two axial ends also respectively are provided with a crank structure 10 respectively to be the reverse linear state about central actuating shaft 12.Through connecting the guide structure 5 of the pair of parallel guide rail form that supporting structure 1 connects, be arranged on the pedestal place of central actuating shaft 12 tops in the mode of upper offset, its upper offset is apart from be effectively 0.8-0.9 times of work moments of crank structure 10.Respectively be combined with on two guide structures 5 one with scrunch that structure 6 is connected and slide block structure 3 that can be reciprocating thereon.This guide structure 5 is for having the bow-shaped cross-section rigidity stripe shape member of three different direction stress surfaces, and cooperating slide block structure 3 thereon is the slide block structure that is provided with the block pulley group form of roller structure 2 at three direction places correspondingly.Be matched with on two guide structures 5 slide block structure 3 and with the distal end portion of the crank structure 10 of its homonymy respectively through the hinging structure 7 of slide block side and the hinging structure 8 of crank side, be connected with the structure 9 that is rigidly connected of connecting rod form, wherein the hinging structure 8 of the hinging structure 7 of slide block side and crank side is the structure of rolling bearing form.

Fig. 3～shown in Figure 6 is the motion state analysis of the utility model said apparatus working procedure.Clear for ease of narrating, special with the and arranged on left and right sides crank structure in the said structure, connecting rod linkage structure and guide structure and cooperate thereon slide block structure to give different labels respectively to be distinguished, wherein corresponding with right side crank structure 10 is left side crank structure 100, corresponding with the connecting rod 9 on right side is the connecting rod 99 in left side, the slide block structure 33 of cooperation on the guide structure 55 in corresponding with the slide block structure that cooperates on the right side guide structure 53 be left side.

In Fig. 3, dotted line position is the initial state that device is set.This moment, left side connecting rod 99 was in collinear " dead point " location status with left crank 100, but right

side connecting rod

9 and 10 on right crank are in and have the trace drive condition position that can produce big detent torque angle, make device not can be activated smoothly and more like a cork by left side connecting rod 99 and the influence that left crank 100 is somebody's turn to do " dead point ".Shown in the solid line then to be right side slide block 3 make right crank 10 and central actuating shaft 12 by the position after 45 ° of the starting point rotations at the certain distance that advances on the trace direction, 100 on the crank in left side also rotates 45 ° synchronously, drive left slider 33 and make corresponding returning movement on the return direction, the distance of its return return will be slightly larger than the trace move distance of right side slide block 3.

Shown in Figure 4 is that right side slide block 3 makes central actuating shaft 12 continue 45 ° of rotations through the right crank 10 of right side connecting rod 9 drives, promptly by the state behind the starting point half-twist.This moment, left crank 100 and left side connecting rod 99 drive left sliders 33 also continued the corresponding distance of motion on return return direction, but the return returning movement of left slider 33 distance has promptly shown " anxious returning " characteristics that it had obviously greater than the trace move distance of right side slide block 3 as can be seen.

Shown in Figure 5 is central actuating shaft 12 continues 45 ° of rotations by the position of Fig. 4 under right side slide block 3 and right crank 10 drive, the state when promptly having rotated 135 ° with respect to the start position of Fig. 3.This moment, left side connecting rod 99 was in collinear " dead point " state again with left crank 100, but the crank 10 on right side still is in the continuation movement process under the trace drive condition, and therefore left side connecting rod 99 and left crank 100 are residing should " dead point " states can't influence device and continue to run well by original mode.Simultaneously, this state also just left side connecting rod 99 and left crank 100 transfer the turning point of trace actuation movement to by the return returning movement, this moment the left slider 33 corresponding highest distance position places that also moved to the return return.

Shown in Figure 6 is that central actuating shaft 12 continues 45 ° of rotations, the state when promptly having rotated 180 ° with respect to the initial point position of Fig. 3 again under right

side slide block

3 and 10 drives of right crank.Right side slide block 3 has moved to the highest distance position place of trace actuation movement at this moment, and make right side connecting rod 9 and right crank 10 be in collinear " dead point " state, but this moment, left side connecting rod 99 and crank 100 were crossed the turning point shown in Fig. 5, on the trace direction, move to the trace initial position state that can produce big moment of rotation, right side connecting rod 9 is identical with right crank 10 residing states among this state and Fig. 3, beginning continues to drive central actuating shaft 12 rotations by left slider 33 through left connecting rod 99 and left side crank 100, and right side connecting rod 9 also can be to the normal operation formation influence of device with " dead point " state that is somebody's turn to do of right crank 10, and the slide block 3 on right side and right connecting rod 9 begin to do the return returning movement identical with above-mentioned left side corresponding mechanism with 10 on right side crank.Can realize that so circulation firmly drives the operation continuously of this device again.

By above-mentioned motion analysis, can also further know and understand the reason place that the utility model drive unit can have higher transmission conversion efficiency working procedure.Initial state with right side crank mechanism trace actuation movement among Fig. 3 is an example.Because the linear velocity that crank 10 far-ends rotate in the trace movement process will be apparently higher than the linear velocity of slide block 3 motions, its omnidistance average linear velocity will be about 1.4 times of slide block movement linear velocity, and connecting rod 9 and slide block 3 are big more along the angle ψ between the movement locus of guide rail 5, its linear differential is also big more, and connecting rod 9 and the slide block 3 of this moment are in maximum rating substantially along the angle ψ between the movement locus of guide rail 5, the linear velocity that crank 10 far-ends rotate will be about 2 times of linear velocity of slide block 3 motions, therefore to power conversion efficiency very strong benefiting action will be arranged.On the other hand, the active force of slide block 3 passes to crank 10 by connecting rod 9, therefore passes to the directed force F of crank 10 through connecting rod 9 _ConnectDriving force F with slide block 3 _SlidingThe pass be: F _Connect=F _Sliding/ cos ψ, because ψ 〉=0 °, so F _Connect〉=F _Sliding, and maximum F _ConnectBoosting segment all be positioned at the initial position of this startup.With the difference of upper offset distance in the mechanism, F generally speaking _ConnectCan be F _Sliding1.2～1.3 times.This can produce tangible benefiting action again for the power conversion efficiency that improves device.Simultaneously, this humidification is stronger in the starting stage of crank-motion, then changes mild characteristics at intermediate section, has tangible regulating action again.Therefore, the transmission conversion efficiency of the utility model said apparatus is higher, and promptly as described above, its mechanical efficiency value generally can reach 94%～97%.

Claims

1. the reciprocal pedaling type drive unit of upper offset crank block, pedestal (4) is provided with through rolling bearing structure and is matched with the live axle that has drive wheel (13) (12) in the pipe spreader (15), also be provided with the guide structure (5) of pair of parallel on the pedestal (4), be combined with respectively on it and scrunch that structure (6) is connected and slide block structure (3) that can be reciprocating thereon, structure is in transmission connection between this slide block structure (3) and live axle (12), it is characterized in that sentencing and be the reverse linear state and respectively be provided with a crank structure (10) in the axial two side ends of live axle (12), guide structure (5) is arranged at the top of live axle (12) in the mode of upper offset, two slide block structures (3) are in transmission connection with the structure (9) that is rigidly connected with the hinging structure (7,8) of distal end portion on it of the crank structure (10) of its homonymy respectively.

2. the reciprocal pedaling type drive unit of upper offset crank block as claimed in claim 1, it is characterized in that the Offset of said guide structure (5) in live axle (12) top be crank structure (10) effectively work moment 0.5-1 doubly.

3. the reciprocal pedaling type drive unit of upper offset crank block as claimed in claim 2, it is characterized in that said Offset be crank structure (10) effectively work moment 0.8-0.9 doubly.

4. the reciprocal pedaling type drive unit of upper offset crank block as claimed in claim 1, it is characterized in that said guide structure (5) for having the bow-shaped cross-section rigidity stripe shape member of three different direction stress surfaces, cooperating slide block structure (3) thereon is the slide block structure that is provided with the block pulley group form of roller structure (2) at three direction places correspondingly.

5. the reciprocal pedaling type drive unit of upper offset crank block as claimed in claim 1, it is characterized in that the hinging structure (7) that said slide block structure (3) is connected with the structure that is rigidly connected (9), and the hinging structure (8) that is connected with the structure that is rigidly connected (9) of the distal end portion of crank structure (10) is the structural member of rolling bearing form.