CN202349133U

CN202349133U - Stepless speed change device

Info

Publication number: CN202349133U
Application number: CN201120426579XU
Authority: CN
Inventors: 周承岗
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-02
Filing date: 2011-11-02
Publication date: 2012-07-25
Anticipated expiration: 2021-11-02

Abstract

The utility model relates to a stepless speed change device, which comprises an input conical pulley, an output conical pulley and a transmission chain. The axial centers of the input conical pulley and the output conical pulley are arranged in parallel, the conical surfaces of the input conical pulley and the output conical pulley are arranged in an opposite way, and the transmission chain is connected with the input conical pulley and the output conical pulley. The stepless speed change device is characterized in that a plane of a contact transmission unit on the transmission chain, which is vertical to the central point of the contract transmission unit and in the direction of movement around the input conical pulley and the output conical pulley, has rotating freedom, and the inclination direction of the plane can be adjusted automatically to adapt to changes in the directions of the conical surfaces. The selection of materials for manufacturing of the contact transmission unit and the conical pulleys and the taper of the conical pulleys can meet requirements of frictional self-locking; and the static frictional coefficient between the contact transmission unit and the conical pulleys is larger than the tangent value of the taper of the conical surfaces. The peripheral edges of the input conical pulley and the output conical pulley are provided with chutes along the generatrix direction, and a reducing slide block slides along the chutes to change the working diameter, thereby realizing stepless speed change transmission.

Description

A kind of stepless speed changes devices

Technical field

The utility model provides a kind of and automobile, stepless speed changes devices that mechanical field is relevant.

Background technique

Infinite variable speed mechanism is of a great variety, and the cone pulley friction driving is the most frequently used structural type, wherein; " long awl shipper pole formula " stepless speed variator adopts a driving belt and two parallel axes, the conical surfaces to realize the stepless change transmission towards opposite cone pulley; Have clear superiorities such as simple in structure, permanent power, symmetrical speed change, but because driving belt can not twist too big, so can only adopt the very mild long awl of tapering; Plant bulk and weight are all bigger, and use occasion is restricted." cone pulley steel-belt type " stepless speed variator; Be composed of the steel band that " V " type groove is clamped fixed width with two cone pulleys, come conversion active wheel radius, so the big volume of the tapering of cone pulley is less through the axial distance that changes cone pulley; But cone pulley quantity is many one times; Steel band need bear bigger axial clamping force, and performance and manufacture process requirement are higher, has increased manufacture cost and energy consumption.

The model utility content

The purpose of the utility model provides a kind of stepless speed changes devices; It is bigger to overcome " long awl shipper pole formula " stepless speed changes devices volume and weight; And " cone pulley steel-belt type " stepless speed variator cone pulley quantity makes complex structure more; Steel band need bear bigger axial clamping force, the higher and problem that increases energy consumption of performance and manufacture process requirement.The utility model stepless speed changes devices; Comprise input cone pulley (15), output cone pulley (4) and Transmitted chains (13); The Contact Transmission unit (21) of its Transmitted chains top is having rotational freedom perpendicular to self central point around on input cone pulley (15) and the plane of exporting cone pulley (4) moving direction, can adapt to the conical surface towards variation adjust true dip direction automatically.

Described stepless speed changes devices comprises the brake pad of common form or the overrunning clutch block of wedging automatically on its Transmitted chains (13).

Described stepless speed changes devices, its Transmitted chains (13) top are equipped with canting adjustment line (14).

Described stepless speed changes devices, its Contact Transmission unit (21), input cone pulley (15) and the selection of output cone pulley (4) Manufacturing material and the size of cone pulley tapering satisfy following condition: the static friction coefficient between Contact Transmission unit (21) and input cone pulley (15), the output cone pulley (4) is greater than the tangent value of conical surface tapering.

Described stepless speed changes devices has the chute (12) along generatrix direction on the periphery of its input cone pulley (15), output cone pulley (4), and reducing slide block (5) is arranged on the chute (12).

Described stepless speed changes devices, the row of employing pearl, leading screw, drag-line or pull bar driving mechanism realize that the round straight line of reducing slide block (5) moves.

Described stepless speed changes devices, the parallel axes of its Idle wheel (28) and input cone pulley (15) is driven along guide rail (30) by Transmitted chains (13) and to move, in moving with Transmitted chains (13) retainer shaft to synchronously, but relative displacement is arranged at warp-wise.

Described stepless speed changes devices; Its output cone pulley (4) is connected with output shaft (1) coaxial rotation; Be fixedly connected with star gear outer ring; Clutch (8) and output shaft (1) tangential locking, be in axial sliding connection, move respectively forward and backward and engage with output cone pulley (4) and planetary pinion inner ring (9).

Described stepless speed changes devices can be realized manual control, Computerized intelligent control or the control that mutually combines through making up with the corresponding function component, can be applicable to fields such as industrial and agricultural machinery, the traffic tool.

The cycle that the Contact Transmission part that the utility model stepless speed changes devices adopts can be followed conical surface true dip direction changes the Transmitted chains of automatic canting; Compare with " long awl shipper pole formula " stepless speed changes devices; Because need not consider the problem on deformation of Transmitted chains; So tapering can be bigger, thereby reduce cone length and weight; Utilize the friction self-locking condition to prevent the radial slippage between Transmitted chains and the cone pulley, compare with the existing steel band stepless speed variator that is combined into two " V " type diameter-changing wheels with four cone pulleys, cone pulley quantity has been lacked one times; Need not as the steel band stepless speed variator, apply very big axial compression power, reduce manufacturing process requirement and saved energy Transmitted chains; The row's of employing pearl pump or lead-screw drive mechanism realize that the straight line of reducing slide block moves relatively saving action and puts the space to good use.

Description of drawings

Fig. 1 is the overall structure view; Fig. 2 is that A-A among Fig. 1 is to view; Fig. 3 is a modular construction of forming Transmitted chains; Fig. 4 is that rotating component and Contact Transmission part are two types of separate form; Fig. 5 is the zoomed-in view of the row pearl pump 2 among Fig. 1; Fig. 6 is complete row pearl loop view; Fig. 7 is the tensioning mechanism view.

Embodiment

With reference to overall structure shown in Figure 1, A-A shown in Figure 2 to view, input shaft 16 and output shaft 1 parallel placement; Input shaft 16 is fixedly connected with input cone pulley 15, and output shaft 1 is rotationally connected with output cone pulley 4; Input cone pulley 15 and output cone pulley 4 conical surfaces are towards on the contrary, and there are the some chutes 12 that distribute along generatrix direction the top, has two ends that the reducing slide block 5 of block 6 is arranged on the every chute; Transmitted chains 13 is placed perpendicular to input shaft 16, between the block 6 at reducing slide block 5 two ends, passes.Transmitted chains 13 is made up of modular construction shown in Figure 3, comprises assemblies such as canting piece 21, roller 25; End-to-end between the chain core 24 adopts the pin-and-hole 23 of roll pin at the initial and end place to be rotationally connected, and forms a closed chain; Canting piece 21 is rotationally connected through the circular hole and the chain core 24 of centre, has the roller 25 of the axial force of bearing to alleviate pivoting friction between the stressed end face; When canting piece 21 carries out friction driving at the conical surface of its lower surface and input cone pulley 15 and output cone pulley 4, through around chain core 24 from transfer adapt to the conical surface towards variation, make rubbing surface in dynamically, keep stable the contact.

Canting piece 21 shown in Figure 3 itself is exactly the friction driving element, and the performance requirement between rotating component and friction member has the occasion of significant difference, adopt the such structural type of A as shown in Figure 4, loads onto special friction driving piece 26 in the bottom of canting piece 21.Except common friction driving form; Also can adopt the such overdrive clutch type of belt drive of B as shown in Figure 4; Load onto bidirectional overtaking clutch block 27 in the bottom of canting piece 21, when contacting with output cone pulley 4 conical surfaces, respectively from opposite direction wedging Transmitted chains 4 with input cone pulley 15.

In order to alleviate the bump of the canting piece 21 and the conical surface, the line hole 22 of adopting canting adjustment line 14 to pass its two ends is together in series all canting pieces 21.Canting adjustment line 14 appropriateness are tightened, and canting piece 21 is after leaving a conical surface, and along the height difference in canting adjustment line 14 continuous adjustment two end line holes 22, the canting angle is just in time coincide each other when arriving another conical surface.Adopt big Spielpassung between canting adjustment line 14 and the line hole 22, reduce friction in order to avoid influence canting piece 21 activity freely, the life-span of also improving adjustment line 14.

Need bigger length could obtain bigger gear ratio when tapering is too little, and tapering too conference make radial frictional force between the Transmitted chains and the conical surface too little and easily in slide relative radially, cisco unity malfunction.If tapering is during less than the friction angle between the Transmitted chains and the conical surface; The Transmitted chains and the conical surface are radially producing the sliding friction self-locking; Can not make them produce slide relative no matter radial force is much, so the utility model is selected the big material friction driving component of friction factor for use; The big as far as possible cone pulley tapering that meets condition of self-locking can be obtained like this, indexs such as wear resistance, thermal conductivity and mechanical strength will be taken into account in addition.Brake pad material is more satisfactory selection, particularly wear-proof metal ceramic, and it is not less than 0.35 with the static friction coefficient of cast iron, adopts this friction pair, and the tapering that produces condition of self-locking can reach 35:100 even higher.

With reference to overall structure shown in Figure 1, A-A shown in Figure 2 to view, each some chute 12 that evenly distribute on input cone pulley 15 and the output cone pulley 4 along generatrix direction, quantity is being advisable more than 3; Reducing slide block 5 can slide along chute 12 and move, and there is block 6 at two ends; When implementing speed change, input cone pulley 15 slides along chute 12 with the reducing slide block of exporting on the cone pulley 45 synchronously, delivers to a new radius of clean-up block position to Transmitted chains 13.

With reference to drive part structure shown in Figure 1, input cone pulley 15 respectively is connected a row pearl pump 2 with output cone pulley 4.Like the row pearl pump structure that Fig. 5 amplified; Its primary component has the pump housing 18 and impeller 19; The pump housing 18 is fixedly connected with output cone pulley 4, and its chamber inner top has guiding arc 17 (the vertical projection shape is shown in 20 among Fig. 6), and impeller 19 is rotationally connected with output shaft 1; Zigzag blade is arranged at the top, and its power is from the hydraulic power unit that is fixedly connected with the pump housing 18.As shown in Figure 6; Ball 3 begins from a side of reducing slide block 5, closely arranges along chute, through beeline channel in row pearl pump, the cone pulley body and the passage that turns round in the planet wheel outer ring 7; Get back to the opposite side of reducing slide block 5 at last along chute, form the loop of sealing.Impeller 19 does not rotate with output cone pulley 4 constant speed when starting; With cone pulley 4 speed difference is arranged after being activated; Getting into ball in the row pearl pump chamber from a side of reducing slide block 5 is pushed along circumferencial direction and moves; Be directed in the cone pulley body when arriving the position of guiding arc 17, promote reducing slide block 5 straight lines along passage from opposite side and move.Control the straight line movement direction of reducing slide block 5 with rotating and reverse of impeller 19.Also can adopt leading screw, drag-line or pull bar driving mechanism to realize that reducing slide block 5 straight lines move, but require the row of use pearl or screw mechanism under the less situation in motion space.

As shown in Figure 7; The rotating shaft of the Idle wheel 28 that is fixedly connected with slide block 29 and the parallel axes of importing cone pulley 15; Hard-wired guide rail 30 and the interior side bus almost parallel of importing cone pulley 15 when Transmitted chains 13 moves axially, drive Idle wheel 28 and move along guide rail 30 with slide block 29.Idle wheel 28 adopts the hold down gag of hydraulic pressure installation, elastic force apparatus or other type to compress.

As shown in Figure 1; Output shaft 1 is rotationally connected with output cone pulley 4; Output shaft 1 and clutch 8 be employed in axially can slide relative the spline Placement; Output cone pulley 4 is fixedly connected with planetary pinion outer ring 7, planetary carrier 10 fixed installations, and dead axle planetary pinion 11 meshes with planetary pinion outer ring 7 and planetary pinion inner ring 9 respectively.Clutch 8 moves forward when exporting cone pulley 4 and engage, output shaft 1 main story, and when clutch 8 moved backward and engages with planetary pinion inner ring 9, output shaft 1 reversed, and it then is neutral gear that clutch 8 mediates.Only need to move clutch 8 just can realize forward gears, neutral gear under the non-stop-machine situation and reverse gear between switching.

The gear shift control process can adopt artificial judgment manually to control, also can inductor, parts such as electrohydraulic control, ECU, TCU connect and realize more accurate intelligent control reliably, the application in fields such as suitable industrial and agricultural machinery, the traffic tool.

Claims

1. stepless speed changes devices; Comprise input cone pulley (15), output cone pulley (4) and Transmitted chains (13); The Contact Transmission unit (21) that it is characterized in that Transmitted chains (13) top is having rotational freedom perpendicular to self central point around on input cone pulley (15) and the plane of exporting cone pulley (4) moving direction, can adapt to the conical surface towards variation adjust true dip direction automatically.

2. stepless speed changes devices according to claim 1 is characterized in that comprising on the Transmitted chains (13) brake pad of common form or the overrunning clutch block of wedging automatically.

3. stepless speed changes devices according to claim 1 and 2 is characterized in that it being that canting adjustment line (14) is equipped with in Transmitted chains (13) top.

4. stepless speed changes devices according to claim 3, it is characterized in that Contact Transmission unit (21), input cone pulley (15) and the selection of output cone pulley (4) Manufacturing material and the size of cone pulley tapering satisfy following condition: the static friction coefficient between Contact Transmission unit (21) and input cone pulley (15), the output cone pulley (4) is greater than the tangent value of conical surface tapering.

5. stepless speed changes devices according to claim 4 has the chute (12) along generatrix direction on the periphery that it is characterized in that importing cone pulley (15), exporting cone pulley (4), and reducing slide block (5) is arranged on the chute (12).

6. stepless speed changes devices according to claim 5 is characterized in that the round straight line of the row of employing pearl, leading screw, drag-line or pull bar driving mechanism realization reducing slide block (5) moves.

7. stepless speed changes devices according to claim 6; It is characterized in that importing the parallel axes of the axis and the Idle wheel (28) of cone pulley (15); Idle wheel (28) is driven along guide rail (30) by Transmitted chains (13) and moves; In moving with Transmitted chains (13) retainer shaft to synchronously, but relative displacement is being arranged radially.

8. stepless speed changes devices according to claim 7; It is characterized in that exporting cone pulley (4) is connected with output shaft (1) coaxial rotation; Be fixedly connected with star gear outer ring; Output shaft (1) and clutch (8) tangential locking, be in axial sliding connection, move respectively forward and backward and engage with output cone pulley (4) and planetary pinion inner ring (9).