CN201262217Y - compact symmetrical gearbox - Google Patents

Abstract

The utility model discloses a compact symmetrical gearbox, which comprises a box body (16), a variable transmission part, a steering brake part and a driving part, wherein the variable transmission part, the steering brake part and the driving part are arranged in the box body, and the variable transmission part comprises a reverse gear shaft (I), a clutch shaft (II), a second shaft (III) and an auxiliary variable shaft (IV) which are supported on the box body (16) by bearings; the reverse gear shaft (I) is sleeved with a reverse gear intermediate gear (1); the clutch shaft (II) is sleeved with a reverse gear I driving gear (2) and gear III and gear II driving gears (3 and 4), and the gear III and gear II driving gears (3 and 4) form a duplicate gear; the second shaft (III) is sequentially provided with driven gears (5, 6 and 7) of gears I, III and II and an auxiliary transmission intermediate gear (8); an auxiliary speed change slow gear (9), a central transmission driving gear (10) and an auxiliary speed change fast gear (11) are sequentially arranged on the auxiliary speed change shaft (IV); after adopting above-mentioned structure, have simple structure compactness, processing convenience, stable performance reliable, high transmission efficiency, low in production cost, application scope advantage such as big.

Description

compact symmetrical gearbox

technical field

The utility model relates to a gearbox, in particular to a gearbox used on a harvester or a crawler walking machine.

Background technique

As we all know, my country is the most populous country in the world, and it is also a big agricultural country. With the rapid development of the national economy, the country's investment in agriculture and infrastructure continues to increase, and the sales of harvesters or crawler walking machinery are increasing day by day. The gearbox used in the existing harvester or crawler walking machinery is as shown in accompanying drawing 1. The front part is the transmission part of (3+1)×2 gears, mainly composed of auxiliary transmission shaft I, second shaft II, main transmission shaft III, intermediate shaft IV, reverse shaft V, auxiliary transmission slow gear 1 and auxiliary transmission shaft Variable speed fast gear 2, II gear driving gear 3, III gear driving gear 4, I gear driving gear 5, reverse gear 6, II gear passive gear 7, III gear passive gear 8, central transmission driving gear 9, I reverse gear Driven gear 10, intermediate gear 11, reverse gear intermediate gear 12 constitute; Steering brake part is made up of steering shaft VI, jaw clutch (comprising central transmission gear 13, steering gear 14) and wet friction disc brake 15 etc. The driving mechanism; the drive part is the final drive part of the two-stage gear transmission, mainly composed of gear shaft VII, reduction gear 16, drive wheel shaft VIII, and drive gear 17. This kind of gearbox realizes eight gears by eight shafts. The gearbox is bulky, difficult to process, has many parts, complex structure, long transmission line, large loss, low efficiency and high production cost.

Its transmission route is as follows:

For this reason, many manufacturers and people of insight carry out development and research, but there is no better way to solve the above-mentioned existing problems so far.

Contents of the invention

In order to overcome the above-mentioned deficiencies of existing gearboxes, the purpose of this utility model is to provide a compact symmetrical gearbox with simple and compact structure, stable and reliable performance, small volume, light weight and low cost.

The technical scheme adopted by the utility model to solve its technical problems includes a box body and a variable speed transmission part, a steering braking part and a driving part arranged in the box body, and the feature is that the variable speed transmission part is supported by a bearing The reverse shaft, the clutch shaft, the second shaft and the auxiliary transmission shaft on the casing; the reverse intermediate gear is sleeved on the reverse shaft, the I reverse driving gear and the III and II driving gears are sleeved on the clutch shaft, and the III, II driving gears are sleeved on the clutch shaft. The driving gear of II gear forms a duplex gear, and the passive gears of I, III, and II gears and the auxiliary transmission intermediate gear are arranged in sequence on the second shaft, and the auxiliary transmission slow gear, the central transmission driving gear, and the auxiliary transmission are arranged in sequence on the auxiliary transmission shaft Fast gear; I reverse driving gear meshes with I gear passive gear when moving forward, and meshes with reverse gear intermediate gear when retreating; III and II gear driving gears cooperate with III and II gear passive gears in turn; I gear passive gear and The auxiliary transmission slow gear meshes, and the auxiliary transmission intermediate gear meshes with the auxiliary transmission fast gear.

In a further preferred solution of the present utility model, the steering brake part includes a steering shaft supported on the box by bearings, a central transmission gear, two steering gears and two sets of wet friction plate brakes, and the central transmission gear is arranged on the steering shaft. In the middle of the shaft, two steering gears are respectively arranged on the steering shaft on both sides of the central transmission gear, and two sets of wet friction disc brakes are respectively arranged on both sides of the steering shaft, and the central transmission gear meshes with the central transmission driving gear.

In a further preferred solution of the present utility model, the driving part includes driving wheel shafts arranged on both sides of the box body and driving gears arranged on the driving wheel shafts, and the two driving gears mesh with the transmission gear correspondingly.

In a further preferred solution of the present utility model, the box body is arranged symmetrically with respect to the center line, and the clutch is installed on the clutch shaft on any side of the box body.

After the above structure is adopted, on the basis of the existing gearbox, all gears and shafts are optimized and arranged rationally. The gearbox can realize eight shifting gears with six shafts, which simplifies the internal structure to the greatest extent and shortens the length of time. The transmission line; the gearbox box is symmetrical with respect to the central plane, which reduces the difficulty of box processing; the clutch can be installed on any side of the box, which greatly improves the matching adaptability of the gearbox; it has simple and compact structure, convenient processing, and high performance. Stable and reliable, high transmission efficiency, low production cost, long service life and other advantages.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing gearbox.

Fig. 2 is a structural schematic diagram of the utility model.

Fig. 3 is a structural schematic diagram of the utility model clutch installed on the other side of the box.

Detailed ways

Shown in Fig. 2 and Fig. 3, it is the concrete embodiment of the compact symmetrical gearbox of the present invention, and it comprises box body 16 and the speed change transmission part that is arranged in the box body, steering brake part and driving part; Described box body 16 is arranged symmetrically with respect to the center line, which is beneficial to the processing and installation of the casing 16; the transmission part of the transmission includes a reverse gear shaft I, a clutch shaft II, a second shaft III, a clutch shaft II, a second shaft III, Auxiliary transmission shaft IV; reverse gear shaft I is sleeved with reverse intermediate gear 1, through which reverse intermediate gear 1 realizes backward; clutch shaft II is sleeved with I reverse gear drive gear 2 and III, II gear drive gears 3, 4, The driving gears 3 and 4 of the III and II gears form a duplex gear, and six forward gears with different speeds and two reverse gears with different speeds are realized by manipulating the I reverse gear 2 and the III and II gears 3 and 4; The second shaft III is provided with I, III, II gear passive gears 5, 6, 7 and auxiliary transmission intermediate gear 8 in sequence, and auxiliary transmission shaft IV is successively provided with auxiliary transmission slow gear 9, central transmission driving gear 10, auxiliary transmission Fast gear 11; I reverse gear driving gear 2 meshes with I gear passive gear 5 when moving forward, and meshes with reverse gear intermediate gear 1 when retreating; III and II gear driving gears 3 and 4 sequentially engage with III and II gear passive gears 6, 7 cooperate; I gear passive gear 5 meshes with auxiliary transmission slow gear 9, auxiliary transmission intermediate gear 8 meshes with auxiliary transmission fast gear 11, clutch 17 can be installed on the clutch shaft II on any side of casing 16, The matching adaptability of the gearbox can be greatly improved.

The steering brake part includes a steering shaft V supported by bearings on the box body 16, a central transmission gear 12, two steering gears 13 and two sets of wet friction disc brakes 14, and the central transmission gear 12 is arranged on the steering shaft V. In the middle of the center, two steering gears 13 are arranged on the steering shaft V on both sides of the central transmission gear 12, and two groups of wet friction plate brakes 14 are respectively arranged on both sides of the steering shaft V, and the central transmission gear 12 and the auxiliary transmission shaft IV The central transmission driving gear 10 meshes.

The driving part includes a driving wheel shaft VI arranged on both sides of the casing 16 and a driving gear 15 arranged on the driving wheel shaft VI. The two driving gears 15 mesh with the two transmission gears 12 on the steering shaft V correspondingly.

The transmission route of the present utility model is as follows:

By comparing the two transmission routes, the utility model simplifies the internal transmission structure to the greatest extent, effectively shortens the transmission route, and has a more compact structure, which can effectively reduce the volume and weight, and improve the transmission efficiency.

Claims (4)

1. A compact and symmetrical gearbox, comprising a case body (16) and a speed change transmission part, a steering brake part and a drive part arranged in the case body, and its feature is that the speed change transmission part includes bearings supported on the case The reverse gear shaft (I), the clutch shaft (II), the second shaft (III), and the auxiliary transmission shaft (IV) on the body (16); the reverse gear intermediate gear (1) is sleeved on the reverse gear shaft (I); The clutch shaft (II) is sleeved with I reverse gear driving gear (2) and III, II gear driving gears (3, 4), and III, II gear driving gears (3, 4) form a duplex gear; the second shaft (III ) are sequentially provided with I, III, II gear passive gears (5, 6, 7) and sub-transmission intermediate gears (8); sub-transmission shafts (IV) are sequentially provided with sub-transmission slow gears (9), central transmission Drive gear (10), secondary gear fast gear (11); I reverse gear drive gear (2) meshes with I gear passive gear (5) when moving forward, and meshes with reverse gear intermediate gear (1) when going backward; III , II block driving gear (3, 4) cooperates with III, II block passive gear (6, 7) successively; I block passive gear (5) meshes with auxiliary transmission slow gear (9), auxiliary transmission intermediate gear (8) Mesh with auxiliary speed gear (11). 2. The compact symmetrical gearbox according to claim 1, characterized in that: the steering braking part includes a steering shaft (V) supported on the box (16) by bearings, a central transmission gear (12) , two steering gears (13) and two groups of wet friction disc brakes (14), the central transmission gear (12) is arranged in the middle of the steering shaft (V), and the two steering gears (13) are respectively arranged on the central transmission gear (12 ) on the steering shaft (V) on both sides, two groups of wet friction disc brakes (14) are respectively located on both sides of the steering shaft (V), and the central transmission gear (12) meshes with the central transmission driving gear (10). 3. The compact symmetrical gearbox according to claim 1 or 2, characterized in that: the drive part includes drive wheel shafts (VI) respectively arranged on both sides of the box body (16) and drive wheel shafts (VI) ) on the driving gear (15), two driving gears (15) are correspondingly meshed with the transmission gear (12). 4. The compact symmetrical gearbox according to claim 3, characterized in that: the box (16) is arranged symmetrically with respect to the center line, and the clutch (17) is installed on the clutch shaft on any side of the box (16) (II) on.

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