CN201963858U

CN201963858U - Automatic gearshift of automobile transmission

Info

Publication number: CN201963858U
Application number: CN2010206261286U
Authority: CN
Inventors: 史铭; 唐广清; 梁志海
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-09-07
Anticipated expiration: 2020-11-26

Abstract

The utility model relates to an automobile transmission structure, in particular to an automatic gearshift of an automobile two-gear transmission. The automatic gearshift is fixedly arranged in a transmission shell and consists of a shifting motor (1), a reduction mechanism (2), a shifting fork shaft (3) and a shifting fork driving device, wherein the reduction mechanism (2) is connected with an output end of the shifting motor (1); the shifting fork shaft (3) is positioned and arranged in the transmission shell through a bearing (5); the shifting fork driving device is used for being matched with a shifting fork (4) arranged on the shifting fork shaft (3) and driving the shifting fork (4) to move along the straight line on the shifting fork shaft (3); the shifting fork driving device is a screw thread pair (6) which is fixedly sleeved on the shifting fork shaft (3) and is fixedly connected with the shifting fork (4); and the shifting fork shaft (3) is used for driving the shifting fork (4) to move linearly through thread screwing of the screw thread pair (6) when being borne by an output power of the reduction mechanism (2). Due to the adoption of the technical scheme, the transmission is easy to manufacture and has a compact structure and rapider and more accurate operation response.

Description

The automotive transmission automatic gear shift apparatus

Technical field

The utility model relates to a kind of automotive transmission structure, the especially automatic gear shift apparatus of automobile two speed transmission.

Background technique

The gearshift of existing two-shift automatic variable speed automobile mainly comprises gear shifting motor, reducing gear, shift fork drive unit (shift block), declutch shift shaft, shift fork composition, wherein, reducing gear adopts worm gear, worm reduction gear more, and shift block adopts cam mechanism more.When gear shift, provide driving source or rotating speed by shift motor, after reducing gear slows down, be converted to rotatablely moving of cam, the shift fork straight line that the rotation of cam promotes to be enclosed within on the declutch shift shaft moves, and then realizes gear switch.Adopt this structure, because it is many to participate in gear shift original paper quantity, the transferring power complexity, increased the rate of breakdown of gearshift, in the manufacturing and designing of worm and gear, cam mechanism, also have quality of product hidden danger, and worm and gear, cam mechanism difficulty of processing are big, the manufacture cost height.In addition, when gear shift, cam mechanism is because always there is the gap in the accuracy of manufacturing factor, though this gap is little, gear shifting motor needs big corner just can remedy this gap, so the gear shift action is corresponding slower, and occurs gear shift phenomenon not in place easily.

The model utility content

Be to solve the deficiencies in the prior art, the utility model provides a kind of easy to manufacture, compact structure, action response faster, automotive transmission self-clanging gear-shift more accurately.

For achieving the above object, automotive transmission automatic gear shift apparatus of the present utility model is fixedly installed in the case of transmission, by gear shifting motor, the reducing gear that links to each other with the shift motor output terminal, by the bearing location be arranged on declutch shift shaft in the case of transmission, be equipped with shift fork on declutch shift shaft and shift fork in the declutch shift shaft upper edge straight-line shift fork drive unit forms, the shift fork drive unit be fixedly set on the declutch shift shaft, and the screw pair that is fixedly linked of shift fork; Described declutch shift shaft is when accepting the reducing gear outputting power, and the screw thread by screw pair revolves and drives the shift fork straight line motion.

As the improvement of aforesaid way, declutch shift shaft axis and shift motor output shaft parallel axes.

As the further improvement of aforesaid way, shift motor and screw pair are positioned at reducing gear the same side.

Select as the kind of reducing gear in the such scheme, it can be a kind of in reduction gear, chain slowing-down structure or the belt reducing gear.For the selection of bearing, can be sliding bearing, also can be rolling bearing.

In addition, on the two ends of declutch shift shaft, be connected with bearing.

Adopt technique scheme, the shift fork drive unit adopts and is fixedly set on the declutch shift shaft, the screw pair that is fixedly linked with shift fork substitutes existing cam structure, compare worm and gear, the cam mechanism low cost of manufacture, and processing is simple, avoided cam structure adding the work difficulty in man-hour, saved cost, simultaneously, the rotation of slowing-down structure is changed into the straight line motion of shift fork by screw pair, the gap of having avoided cam mechanism to bring owing to the accuracy of manufacturing factor causes the slower situation of gear shift action, makes the gearshift reaction fast, accurately, have the advantage of screw pair transmission simultaneously concurrently, as motion accuracy height, stable working, noiseless etc.; In addition, the shifting element that participates in the overall structure is few, and the rate that breaks down is low.

Description of drawings

Below in conjunction with the drawings and the specific embodiments the utility model is done further to describe in detail:

Fig. 1 is an overall structure schematic representation of the present utility model;

Fig. 2 is declutch shift shaft and shift fork annexation structural representation.

Wherein: 1, gear shifting motor; 2, reducing gear; 3, declutch shift shaft; 4, shift fork; 5, bearing 6, screw pair

Embodiment

By Fig. 1, as can be known shown in Figure 2, automatic gear shift apparatus of the present utility model is fixedly installed in the case of transmission, by gear shifting motor 1, the reducing gear 2 that links to each other with shift motor 1 output terminal, by bearing 5 (present embodiment employing sliding bearing) location be arranged on the declutch shift shaft 3 in the case of transmission, shift fork 4 and the shift fork 4 that is equipped with on declutch shift shaft 3 formed in the straight-line shift fork drive unit in declutch shift shaft 3 upper edges.

Reducing gear 2 can adopt a kind of in reduction gear, chain slowing-down structure or the belt reducing gear, what present embodiment adopted is reduction gears mechanism, specifically, the driving gear of reducing gear 2 links to each other with the pto of shift motor 1, be installed with declutch shift shaft 3 on its driven gear, declutch shift shaft 3 axis and shift motor 1 output shaft parallel axes, and on the two ends of declutch shift shaft 3, be connected with bearing 5.

The shift fork drive unit be fixedly set on the declutch shift shaft 3, with the screw pair 6 that shift fork 4 is fixedly linked, shift motor 1 is positioned at reducing gear 2 the same sides with screw pair 6; Shift fork 4 bipods snap in the groove of tooth cover cylindrical, by the motion of tooth cover restriction shift fork circumferencial direction.

During use, after controller sends shift command, shift motor 1 rotates forward or backwards, power passes to declutch shift shaft 3 through reducing gear 2, the rotation of declutch shift shaft 3 circumferencial directions, be converted to the straight line motion of shift fork 4 along the declutch shift shaft axial direction behind screw pair 6, shift fork drives the tooth cover and moves the realization gear switch.

Above content is preferred embodiment of the present utility model, for those skilled in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.

Claims

1. automotive transmission automatic gear shift apparatus, this automatic gear shift apparatus is fixedly installed in the case of transmission, by gear shifting motor (1), the reducing gear (2) that links to each other with shift motor (1) output terminal, by bearing (5) location be arranged on the declutch shift shaft (3) in the case of transmission, shift fork (4) and the shift fork (4) that is equipped with on declutch shift shaft (3) formed in the straight-line shift fork drive unit in declutch shift shaft (3) upper edge, it is characterized in that: described shift fork drive unit for be fixedly set on the declutch shift shaft (3), and the screw pair (6) that is fixedly linked of shift fork (4); Described declutch shift shaft (3) is when accepting reducing gear (2) outputting power, and the screw thread by screw pair (6) revolves and drives shift fork (4) straight line motion.

2. vehicle automatic gear shifting device according to claim 1 is characterized in that: described declutch shift shaft (3) axis and shift motor (1) output shaft parallel axes.

3. vehicle automatic gear shifting device according to claim 1 and 2 is characterized in that: described shift motor (1) is positioned at reducing gear (2) the same side with screw pair (6).

4. vehicle automatic gear shifting device according to claim 1 is characterized in that: a kind of in reduction gear, chain slowing-down structure or the belt reducing gear of described reducing gear (2).

5. vehicle automatic gear shifting device according to claim 1 is characterized in that: described bearing (5) is a kind of in sliding bearing, the rolling bearing.

6. vehicle automatic gear shifting device according to claim 5 is characterized in that: be connected with bearing (5) on the two ends of declutch shift shaft (3).