CN201170309Y

CN201170309Y - Variable speed pulley

Info

Publication number: CN201170309Y
Application number: CNU2008200189244U
Authority: CN
Inventors: 于欣民
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-13
Filing date: 2008-03-13
Publication date: 2008-12-24
Anticipated expiration: 2018-03-13

Abstract

The utility model provides an infinitive stage transmission belt pulley, comprising a main shaft, two fixed disk sheets, axial sliding blocks, connecting bars, radial sliding blocks, two steel bushing assemblies and two steel bushing fixed elastic pieces, wherein, the two cylindrical steel bushing assemblies made of steel sheets are fixed on inner sides of the two fixed disk sheets by the elastic pieces and can move axially; each fixed disk sheet is provided with four grooves distributed evenly radially, each groove is provided with a radial sliding block which can move freely along the radial direction and has a trapeziform inner side, the steel bushing assemblies are pushed in order to be telescopic with the radial sliding block surface in the axial direction, a protruding trapeziform ring with trapeziform cross section is formed on the inner side of the fixed disk sheet; the radial sliding blocks are connected with the axial sliding blocks through the connecting bars, the axial sliding blocks move along the axial direction under the action of an applied force in order to drive the radial sliding blocks to move, thereby changing effective diameter of the belt pulley. The process does not apply the action force to the lateral surface of the belt pulley, thereby reducing the abrasion of the belt pulley, improving the transmission efficiency, lowering the standard of the belt pulley material and reducing the processing difficulty.

Description

Variable-speed pulley

Affiliated technical field

The utility model relates to mechanical stepless speed changes drive technology field, but specifically is meant a kind of diameter continually varying variable-speed pulley.

Background technique

Usually stepless speed changes devices comprises a drive pulley that links to each other with power source and a negative pulley wheel that links to each other with load, connects by driving belt, and power is delivered to negative pulley wheel from drive pulley.By changing the effective diameter of drive pulley and negative pulley wheel, can change the rotating speed of negative pulley wheel.

The method that changes the belt pulley effective diameter has many kinds, and method commonly used is that belt pulley is combined the drive plate that forms a band V-type groove by two tapered discs.Two discs are divided into fixed disc and mobile disc, and mobile disc can axially move under the thrust of hydraulic pressure etc., regulates the width of V-type groove, driving belt is outwards extruded or is gone into darker to Naylor, produce radial displacement, thereby change the effective diameter of belt pulley, realize the stepless change transmission.In this process, the axial force that driving belt is subjected to disc produces two consequences, and the one, driving belt is wasted power when the turnover belt pulley, the 2nd, driving belt is squeezed, the rapid wear that elevates the temperature that rubs takes place between side and the belt pulley, and the strength of materials requires high, complex structure.

Summary of the invention

In order to overcome above-mentioned deficiency, the utility model provides a kind of variable-speed pulley that does not produce axial force.

The technological scheme that its technical problem that solves the utility model adopts is: belt pulley comprises two fixed discs that are connected with the rotatingshaft rigidity, each fixed disc radially has at least four equally distributed grooves, it is trapezoidal radial slider that the inboard that can radially move freely is housed on each groove, one group of cylindrical shape steel bushing assembly of being made by steel disc of the inboard flexible fastening of each fixed disc.

That one side margin of each steel bushing assembly has is corresponding with fixed disc fluting, the groove of width and radial slider consistency of thickness, and the radial slider inboard can embed wherein.Have on each steel bushing assembly and be no less than three equally distributed rectangle fixed holes, be fixed on the fixed tray with shell fragment.The internal diameter of outer steel bushing assembly equates with the external diameter of internal layer steel bushing assembly, leaves tolerance, repeatedly overlaps layer by layer, can move freely vertically.

It is axially flexible with shoe surface that radial slider pushing tow steel bushing makes it, and produces displacement, and fitting in the disc inboard and forming the cross section is the keystone ring of stepped protrusion, the height of its ladder and the consistency of thickness of steel bushing.Drivign belt is wrapped on this keystone ring, and the diameter of ring moves up and down and changes with radial slider, thereby changes the effective diameter of belt pulley.

Radial slider mobile be by axial slider move and the push-and-pull of connecting rod realizes.Each belt pulley has two cylindrical axial sliders that are enclosed within on the main shaft, and is coaxial with main shaft, is positioned at the two discs outside, under external force, can move freely vertically.Each axial slider outside evenly distributes and equates the connecting rod fixed projection of aligned in position with fixed disc fluting quantity.Pass through pitman shaft with the connecting rod two ends that disc fluting quantity equates, an end and radial slider, the other end is connected with axial slider.When axial slider axially moved, the push-and-pull radial slider radially moved.

The beneficial effects of the utility model are when realization is infinite variable speed, does not apply active force to the driving belt side, thereby alleviate the wearing and tearing of driving belt, minimizing power loss, raising transmission efficiency, reduction belting standard and difficulty of processing.In addition, the keystone ring of the stepped protrusion that driving belt side view and steel bushing displacement form coincide, and can increase area of contact, prevents to skid.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a plan view of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the stereogram of Fig. 1.

Fig. 4 is a steel bushing assembling schematic representation.

Fig. 5 is the shift diagram after steel bushing is subjected to the radial slider pushing tow.

Fig. 6 is the driving belt sectional view.

1. main shafts among Fig. 1,2. axial slider, 3 connecting rods, 4. radial slider, 5. fixed disc, 6. steel bushing group, 7. pitman shaft, 8. radial slider groove.

9. steel bushing assemblies among Fig. 4,10. steel bushing fixed hole, 11. steel bushing grooves, 12. fixed discs, 13. fixed tray film traps, 14. shell fragments.

Embodiment

In Fig. 1, axial slider (2) is enclosed within on the main shaft (1), and is coaxial with main shaft (1), under the axial force effect, can move vertically.Connecting rod (3) is connected with radial slider (4) with axial slider (2) by pitman shaft (7).Radial slider (4) embeds in Fig. 4 fixed tray film trap (13) by groove (8).When axial slider (2) when moving vertically,, make radial slider (4) do radial motion along Fig. 4 fixed tray film trap (13) by the push-and-pull of connecting rod (3).Radial slider (4) forms steel bushing displacement as shown in Figure 5 in the inboard extruding of fixed disc (5) steel bushing group (6).When radial slider (4) when doing radial motion, steel bushing displacement shown in Figure 5 is radially motion thereupon.

In Fig. 4, the internal diameter of the outer steel bushing assembly of steel bushing assembly (9) equates with the external diameter of internal layer steel bushing assembly, leaves tolerance, repeatedly overlaps layer by layer.The shell fragment (14) that one end is fixed on the fixed disc (12) passes each layer steel bushing fixed hole (10), make steel bushing assembly (9) axial elasticity be fixed on fixed disc (12) inboard, but axial stretching, and steel bushing groove (11) is alignd with fixed tray film trap (13), radial slider among Fig. 1 (4) is inserted in the steel bushing groove (11), with shell fragment (14) acting in conjunction, prevent that steel bushing assembly (9) from rotating.

Claims

1. variable-speed pulley, this belt pulley comprise that main shaft, fixed disc, axial slider, connecting rod, radial slider, steel bushing assembly, steel bushing fixation spring tab form.It is characterized in that: two fixed discs are connected with the main shaft rigidity, two groups of steel bushing assemblies are fixed on the fixed disc inboard by the shell fragment axial elasticity, each fixed disc radially has at least four equally distributed grooves, the radial slider that can radially move freely is housed on each groove, and each radial slider is connected with axial slider by connecting rod.

2. variable-speed pulley according to claim 1 is characterized in that: the internal diameter of outer steel bushing assembly equates with the external diameter of internal layer steel bushing assembly, leaves tolerance, repeatedly overlaps layer by layer; One side margin of each assembly have with fixed disc fluting corresponding, width and the consistent groove of radial slider, and have on each assembly equally distributed, with shell fragment quantity, the consistent rectangle fixed hole in cross section.

3. variable-speed pulley according to claim 1, it is characterized in that: the rectangle fixed hole consistent with the shell fragment cross section evenly distributes on the inboard main shaft of fixed disc, shell fragment one end is fixed on the fixed disc outer rim, the other end passes steel bushing assembly fixed hole, inserts in the spindle hole.

4. variable-speed pulley according to claim 1 is characterized in that: radial slider is a consistency of thickness, and the inboard is trapezoidal, and front and back have and fixed disc fluting groove corresponding, that width is consistent, and the outside is connected with connecting rod by pitman shaft.

5. variable-speed pulley according to claim 1 is characterized in that: two axial sliders are coaxial with main shaft, and internal diameter equates with the main shaft external diameter, leaves tolerance, can move axially, and place the two fixed discs outside, are connected with connecting rod by pitman shaft.