CN213451554U - Mechanical variable-speed type continuously variable transmission - Google Patents

Abstract

The utility model provides a mechanical speed change formula buncher, including the input shaft and the initiative price fixing on it, output shaft and the last driven price fixing of output shaft, initiative driving disk and the driven driving disk that relative price fixing removed, the drive belt sets up on the V-arrangement groove that is formed by the terminal surface of price fixing, driving disk, its characterized in that: still include mechanical variable speed control system, mechanical variable speed control system is including shifting fork subassembly, shifting fork axle, gear motor, and gear motor drive shifts fork subassembly along shifting fork axle axial displacement, shifting fork axle and input shaft parallel arrangement, the setting is connected to the shifting fork subassembly is in initiative variable speed driver plate on the initiative driving disk for initiative driving disk is along input shaft axial displacement under the gear motor drive. The utility model discloses promote the axial displacement of initiative driving disk and driven driving disk by the motor, realize buncher drive ratio's control, the reliability is high, and the fault rate is low, and variable speed response speed is fast, simple structure.

Description

Mechanical variable-speed type continuously variable transmission

Technical Field

The utility model belongs to the technical field of the derailleur technique and specifically relates to a mechanical variable speed formula buncher is related to.

Background

The stepless speed variator is a speed variator applied to automobile transmission system, and has the characteristics of simple structure, small volume, light weight, higher transmission efficiency and low manufacturing cost, and has wider application in automobiles.

The drive ratio of the stepless speed changer is changed by simultaneously making the driving movable disk and the driven movable disk move along the axial direction of the transmission shaft and respectively changing the effective transmission radiuses of the driving part and the driven part of the transmission belt.

However, the change of the transmission ratio of the traditional continuously variable transmission is controlled by a hydraulic system, and the axial movement of the driving dynamic disk and the driven dynamic disk is controlled by changing the pressure difference of the hydraulic piston cavities of the driving dynamic disk and the driven dynamic disk, so that the defects are obvious: (1) the reliability is poor, and because the requirement on the oil pressure control precision of the continuously variable transmission is high, oil circuit faults are easy to occur, which are common faults of the traditional continuously variable transmission and are the most fatal problems. (2) The speed change response speed is slow because the oil pressure building and pressure relief time of the hydraulic piston cavities of the driving dynamic disc and the driven dynamic disc is longer. (3) The hydraulic control system is complex, difficult to manufacture and high in cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mechanical variable speed formula buncher of brand-new structure utilizes gear motor drive shift fork, directly promotes the axial displacement of initiative driving disk and driven driving disk through the shift fork, realizes buncher drive ratio's control, buncher operational reliability is high, the fault rate is low, variable speed response speed is fast, do not need the oil circuit control variable speed simultaneously, consequently simplified hydraulic system greatly, the derailleur is made the degree of difficulty and the cost all reduces, traditional buncher's not enough has been overcome.

The technical proposal of the utility model for solving the technical problem is that: the utility model provides a mechanical speed change formula buncher, includes input shaft and the initiative price fixing on it, output shaft and the last driven price fixing of output shaft, the initiative driving disk and the driven driving disk that the relative price fixing removed, the drive belt sets up on the V-arrangement groove that is formed by the terminal surface of price fixing, driving disk, its characterized in that: still include mechanical variable speed control system, mechanical variable speed control system is including shifting fork subassembly, shifting fork axle, gear motor, and gear motor drive shifts fork subassembly along shifting fork axle axial displacement, shifting fork axle and input shaft parallel arrangement, the setting is connected to the shifting fork subassembly is in initiative variable speed driver plate on the initiative driving disk for initiative driving disk is along input shaft axial displacement under the gear motor drive.

Furthermore, the shifting fork assembly is connected with a driven variable-speed drive plate arranged on the driven movable plate, so that the driven movable plate and the driving movable plate synchronously and axially move under the driving of the speed reducing motor.

Further, the shift fork subassembly includes initiative shift fork, driven shift fork, rack, all be provided with the shifting block on the fork end of initiative shift fork and driven shift fork, the shifting block sets up dials the groove, and the edge of driven variable speed driver plate and initiative variable speed driver plate inserts in dialling the groove for the shifting block drives initiative driving disk, driven driving disk synchronous motion.

Further, the rack is engaged with a gear, and the gear is driven to rotate by a reduction motor.

Further, the shifting fork assembly is sleeved on the shifting fork shaft in an empty mode.

Further, the shifting fork assembly comprises an active shifting fork and a rack, shifting heads are arranged at fork ends of the active shifting fork, shifting grooves are formed in the shifting heads, edges of the active speed-changing shifting disc are inserted into the shifting grooves, the rack is meshed with the gear, and the gear is driven to rotate by a speed reduction motor.

The utility model has the advantages that:

compared with the prior art, the utility model provides a mechanical variable speed formula buncher has overcome the shortcoming that adopts hydraulic control's traditional buncher, has: the axial movement of the driving movable disk and the driven movable disk is pushed by the motor, the control of the transmission ratio of the continuously variable transmission is realized, the reliability is high, the failure rate is low, the speed change response speed is high, the structure is simple, and the manufacturing difficulty and the cost of the transmission are reduced.

Drawings

Fig. 1 is a schematic structural view of the mechanical variable-speed continuously variable transmission of the present invention.

Fig. 2 is a schematic view of the mechanical variable speed transmission taken in the direction a of fig. 1.

Fig. 3 is a sectional view of the power transmission system of the mechanical variable-speed continuously variable transmission of the present invention.

Fig. 4 is a structural view of a shift control portion of the mechanical transmission type continuously variable transmission of the present invention (fig. 1B is a view).

FIG. 5 is a block diagram of a transmission fork assembly and a fork shaft.

Fig. 6 is an operational view of the shift control portion shown in fig. 4 in a gear ratio decreasing state.

Fig. 7 is a schematic diagram of the mechanical transmission according to the present invention in a state where the transmission ratio is reduced from the perspective of fig. 1.

Fig. 8 is a schematic structural view of the mechanical variable-speed continuously variable transmission of the present invention when a shift fork is employed.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. "plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected. Can also be detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

The first embodiment is as follows:

referring to fig. 1-7, the mechanical variable-speed continuously variable transmission of the present invention mainly comprises a power transmission system and a mechanical variable-speed control system, as shown in fig. 1 and 2.

The power transmission system mainly comprises an input shaft 11, a driving movable disc 12, a driving fixed disc 13, a driving piston 18, an output shaft 17, a driven movable disc 15, a driven fixed disc 16, a driven piston 19 and the like, and is shown in fig. 3.

The driving fixed disk 13 is integrally formed with the input shaft 11, and the driving movable disk 12 is mounted on the input shaft 11 to be axially movable. The driven disk 15 is mounted on an output shaft 17 so as to be axially movable, and the driven fixed disk 16 is formed integrally with the output shaft 17.

The driving movable disk 12 and the driving fixed disk 13 form a driving V-shaped groove, and the driven movable disk 15 and the driven fixed disk 16 form a driven V-shaped groove.

The belt 14 is installed between the driving V-groove and the driven V-groove.

The driving disk 12 is provided with a driving speed change dial 31, and the driven disk 15 is provided with a driven speed change dial 32.

The mechanical transmission control system 200 is mainly composed of a fork assembly 20, a fork shaft 28, a gear 27, a reduction motor 26, and the like, as shown in fig. 4 and 5.

The shifting fork assembly 20 is composed of a driving shifting fork 21, a driven shifting fork 23 and a rack 25, the three parts are a whole, shifting blocks 24 are arranged at two ends of the driving shifting fork 21 and two ends of the driven shifting fork 23, a shifting groove 29 is formed in the middle of the shifting block 24, a speed change control part 200 is arranged on a power transmission system, and a driving speed change driving plate 31 and a driven speed change driving plate 32 are respectively positioned in the shifting grooves 29 of the shifting blocks 24 at two ends of the driving shifting fork 21 and the driven shifting fork 23.

A gear 27 is engaged with the rack 25 on the fork assembly 20, the gear 27 being driven by a gear motor 26.

The fork assembly 20 is freely sleeved on a fork shaft 28 and can move axially along the fork shaft 28 under the driving of a speed reducing motor 26.

Analyzing the working process:

as shown in fig. 1, the fork assembly 20 is in the neutral position, the contact position of the driving belt 14 with the driving V-shaped groove and the driven V-shaped groove is in the middle, the driving radius and the driven radius are almost equal, and the transmission ratio is about 1.

When the transmission ratio is to be reduced, as shown in fig. 6 and 7, the reduction motor 26 rotates counterclockwise, the gear 27 pushes the rack 25 and the fork assembly 20 to move rightward, and the driving gear 31 and the driven gear 32 are pushed by the dials 24 at the two ends of the driving fork 21 and the driven fork 23, respectively, to move rightward. At this time, the distance between the right movement of the driving movable disc 12 and the driving fixed disc 13 is reduced, the driving belt 14 is extruded in the driving V-shaped groove to move towards the excircle of the driving V-shaped groove, and the effective transmission radius is increased. And the distance between the driven movable disc 15 and the driven fixed disc 16 is increased, the transmission belt 14 is loosened in the driven V-shaped groove and moves to the center of the driven V-shaped groove, the effective transmission radius is reduced, and therefore the transmission ratio is reduced from large.

When the transmission ratio is to be increased, as opposed to the operation of decreasing the transmission ratio, the reduction motor 26 rotates clockwise, the gear 27 pushes the rack 25 and the fork assembly 20 to move leftward, the effective transmission radius of the transmission belt 14 decreases in the driving V-shaped groove, and increases in the driven V-shaped groove, so that the transmission ratio increases.

Example two:

in order to simplify the structure, the mechanical variable speed stepless transmission of the present embodiment may adopt a fork assembly 20 of a fork to realize the variable speed control of the stepless transmission, the fork may be installed at the driving disc end or the driven disc end, as shown in fig. 8, the design of the fork at the driving disc end is shown.

The rest of the structure is the same as the first embodiment, and is not described herein again.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents, and all changes that can be made without inventive step are intended to be embraced therein.

Claims (6)

1. The utility model provides a mechanical speed change formula buncher, includes input shaft and the initiative price fixing on it, output shaft and the last driven price fixing of output shaft, the initiative driving disk and the driven driving disk that the relative price fixing removed, the drive belt sets up on the V-arrangement groove that is formed by the terminal surface of price fixing, driving disk, its characterized in that: still include mechanical variable speed control system, mechanical variable speed control system is including shifting fork subassembly, shifting fork axle, gear motor, and gear motor drive shifts fork subassembly along shifting fork axle axial displacement, shifting fork axle and input shaft parallel arrangement, the setting is connected to the shifting fork subassembly is in initiative variable speed driver plate on the initiative driving disk for initiative driving disk is along input shaft axial displacement under the gear motor drive.

2. The mechanically variable transmission of claim 1, wherein: the shifting fork assembly is connected with a driven variable-speed drive plate arranged on the driven movable plate, so that the driven movable plate and the driving movable plate synchronously move axially under the driving of the speed reducing motor.

3. The mechanically variable transmission of claim 2, wherein: the shifting fork assembly comprises a driving shifting fork, a driven shifting fork and a rack, shifting heads are arranged on fork ends of the driving shifting fork and the driven shifting fork, the shifting heads are provided with shifting grooves, and edges of a driven speed-changing driving plate and a driving speed-changing driving plate are inserted into the shifting grooves, so that the shifting heads drive the driving plate and the driven driving plate to synchronously move.

4. The mechanically variable transmission of claim 3, wherein: the rack is meshed with a gear, and the gear is driven to rotate by a speed reduction motor.

5. The mechanically variable transmission of claim 4, wherein: the shifting fork assembly is sleeved on the shifting fork shaft in an empty mode.

6. The mechanically variable transmission of claim 1, wherein: the shifting fork assembly comprises an active shifting fork and a rack, shifting heads are arranged at fork ends of the active shifting fork, shifting grooves are formed in the shifting heads, edges of the active speed-changing shifting disc are inserted into the shifting grooves, the rack is meshed with the gear, and the gear is driven to rotate by a speed-reducing motor.

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