CN102506154A - Novel mechanical type transmission - Google Patents

Abstract

The invention relates to a novel mechanical type transmission which comprises box bodies, an input shaft, a middle shaft, an output shaft, bearings, gears, gear shifting forks, synchronizers and a synchronizer check ring, wherein the box body (1) is fixedly connected with the box body (2) and the box body (28) through bolts; the input shaft is arranged on the box bodies through the bearings, the middle shaft is connected to the box bodies through the bearings, and the output shaft is connected to the box bodies through the bearings; the tail end of the input shaft is inserted into the hole of the bearing (3), the bearing (3) is embedded into an inner hole of the output shaft, the synchronizers (9) and (18) are distributed on the input shaft, and the synchronizer (31) is distributed on the middle shaft; and the gears of the input shaft are reverse gear, first gear, second gear, fifth gear and third gear in sequence, the gears on a middle shaft assembly are reverse gear, first gear, second gear, fifth gear, third gear and a constant mesh gear in sequence, and the output shaft is a gear shaft and is meshed with the constant mesh gear. The novel mechanical type transmission provided by the invention has the advantages of compact structure, reasonable design, simpleness in box body processing, high intensity, small vibration, low noise, high transmission efficiency, full synchronizing, and stable on-off gear shift.

Description

A kind of novel mechanical formula speed changer

Technical field

The invention belongs to the automotive transmission technical field, particularly a kind of five retaining mechanical transmissions.

Background technique

Minicar speed changer commonly used at present all is a five forward, and structural type comprises casing, input shaft, output shaft, jack shaft, several gear pairs and synchronizer, gearshift and release bearing operating mechanism.Input shaft and output shaft but do not connect on same axis mutually.The parallel axes of the axis of jack shaft and input shaft, output shaft.Casing adopts integrated type or branch mailbox up and down more.Existing machinery speed changer except that input shaft adopts the cantilever type support; The structural type of reversing gear is: the reverse gear group is between one grade of gear train and second gear group; One retaining driven gear is equipped with the low speed synchronizer with two retainings between the driven gears, so the driven gear that reverses gear is that external toothing with the low speed synchronizer integrates.The deficiency of this structural type is that the technology of the processing gear teeth on external toothing is complicated; And because the restriction of between centers centre distance; The radial dimension of low speed synchronizer, synchronizing ring and gear cone of friction will reduce, and then friction area reduces synchronously, and the gearshift net synchronization capability reduces; Have influence on the bulk life time of low speed synchronizer simultaneously, even have influence on the life-span of whole speed changer.In addition, vibration damping, noise reduction process are not done in gear transmission of the prior art.The casing processing technology is complicated, cleans inconvenience, and assembly technology is poor.Because input shaft adopts cantilever type to support, the rigidity of axle is relatively poor, and the gear meshing noise is higher.Synchronizer is installed on the output shaft, the noise level when further increasing the speed changer running.。

Summary of the invention

The objective of the invention is to overcome the deficiency that exists in the above-mentioned technology; A kind of compact structure, reasonable in design is provided, and casing processing is simple, intensity is high, vibration is little, noise is low, transmission efficiency is high, complete synchronous, clutch shifting novel mechanical formula speed changer stably.In order to achieve the above object, the technological scheme of the present invention's employing is: comprise casing, input shaft, jack shaft, output shaft, bearing, gear, selector fork, synchronizer, the synchronizer back-up ring; Casing is connected through bolt with casing, casing, and input shaft is contained on the casing through bearing, and jack shaft is on the bearing connect box; Output shaft is on the bearing connect box; Input shaft is terminal to be inserted in the bearing hole, and bearing embeds the endoporus of output shaft, and synchronizer is distributed on the input shaft; Synchronizer is distributed on the jack shaft; The gear of input shaft be the order be arranged as reverse gear, one the retaining, two the retaining, five the retaining, three retainings, the gear on the countershaft assembly be the order be arranged as reverse gear, one the retaining, two the retaining, five the retaining, three the retaining, continuously-meshing gear, output shaft is that gear shaft meshes with continuously-meshing gear.Advantage of the present invention is: compact structure, reasonable in design; Casing processing is simple, intensity is high, vibration is little, noise is low, transmission efficiency is high, complete synchronous, clutch shifting is steady, and the driven gear that reverses gear is designed to an independent gear, has simplified the low speed synchronizer structure; Friction area increases synchronously; Improved one, two retaining gearshift net synchronization capabilities, prolonged the low speed synchronizer life-span, made shift process more smooth-going.Input shaft, output shaft, jack shaft all adopt rigid support, have increased the bearing capacity of speed changer.Synchronizer is arranged on the diaxon, has reduced the speed changer noise. Description of drawings [0004]Fig. 1 is a structural representation of the present invention. Embodiment [0005]Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.Can know by Fig. 1; The present invention includes casing 1,2,28, input shaft 25, jack shaft 13, output shaft 7, bearing 3,4,5,6,11,15,26,27, gear 10,12,14,19,20,21,23,24,29,30,33,34, selector fork 8,17,22,32 synchronizers 9,18,31, synchronizer back-up ring 16; Casing 1 and casing 2, casing 28 are connected through bolt; Input shaft 25 is contained on the casing 1,28 through bearing 11,26; Jack shaft 13 is on bearing 6,15,27 connect boxes 1,2,28, and output shaft 7 is on bearing 4,5 connect boxes 2, in input shaft 25 terminal insertion bearings 3 holes; Bearing 3 embeds the endoporus of output shaft 7; Synchronizer 9,18 is distributed on the input shaft 25, and synchronizer 31 is distributed on the jack shaft 13, the gear the 24,23,20,19, the 10th of input shaft 25, the order be arranged as reverse gear, one the retaining, two the retaining, five the retaining, three retainings; Gear the 29,30,33,34,14, the 12nd on jack shaft 13 assemblies, order are arranged as and reverse gear, a retaining, two keeps off, five retainings, three keep off, continuously-meshing gear, and output shaft 7 is that gear shaft is with continuously-meshing gear 12 engagements.Mechanical transmission of the present invention is arranged in the first gear group between reverse gear group and the second gear group; With the driven gear cancellation of reversing gear that is integrated in low speed synchronizer external toothing on the jack shaft; Low speed synchronizer manufacturing process is simple; Friction area increases synchronously, has improved one, two retaining gearshift net synchronization capabilities, has prolonged the life-span of low speed synchronizer.In addition, it is also convenient that part is changed in the maintenance that relates to reverse gear group fault.In addition, three parts before, during and after casing divides, mechanical processing technique is good, cleans easily, assembles; Input shaft, output shaft, jack shaft all adopt rigid support, improve the bearing capacity of speed changer, reduce gear tooth noise simultaneously; Synchronizer is arranged on the diaxon, improves the gearshift performance, simultaneously, also reduces the noise level of speed changer when neutral.

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Claims (1)

1. novel mechanical formula speed changer; Comprise casing (1), (2), (28), input shaft (25), jack shaft (13), output shaft (7), bearing (3), (4), (5), (6), (11), (15), (26), (27), gear (10), (12), (14), (19), (20), (21), (23), (24), (29), (30), (33), (34), selector fork (8), (17), (22), (32) synchronizer (9), (18), (31), synchronizer back-up ring (16); It is characterized in that: casing (1) is connected through bolt with casing (2), casing (28); Input shaft (25) is contained on casing (1), (28) through bearing (11), (26); Jack shaft (13) is on bearing (6), (15), (27) connect box (1), (2), (28); Output shaft (7) is on bearing (4), (5) connect box (2); Input shaft (25) is terminal to be inserted in bearing (3) hole; Bearing (3) embeds the endoporus of output shaft (7); Synchronizer (9), (18) are distributed on the input shaft (25); Synchronizer (31) is distributed on the jack shaft (13); The gear (24) of input shaft (25), (23), (20), (19), (10) be order be arranged as reverse gear, a retaining, two retainings, five retainings, three retainings, gear (29), (30), (33), (34), (14), (12) on jack shaft (13) assembly be order be arranged as reverse gear, a retaining, two retainings, five retainings, three retainings, continuously-meshing gear, output shaft (7) be that the same continuously-meshing gear of gear shaft (12) meshes.