RU214228U1 - DISPENSING AND DRIVE ASSEMBLY FOR VACUUM SWEEPING MACHINE - Google Patents

Abstract

The utility model relates to transmission units of vacuum sweepers using an additional hydraulic transmission and changing the number of driving wheels. The task is to expand the functionality of the dispensing and driving unit of a vacuum sweeper. The dispensing-drive unit (1, Fig. 1) for a vacuum sweeper, containing a housing (2) with a reduction gear in it and with flanges (4,5) protruding beyond it for connection to the vacuum sweeper's engine and for power take-off, as well as hydraulic pumps (9-11) attached to the housing (2), driven by the mentioned reduction gear. A hydraulic motor (13) is fixed on the housing (2), connected hydraulically to one of the hydraulic pumps (11) and mechanically to the said reduction gear. Hydraulic pumps (9,10) are connected through spring-loaded controlled clutches (12) with a reduction gear, which is formed from two parts, the first of which is made with the ability to control the operation of hydraulic pumps (9-11), and the second with the ability to transmit rotation to the flanges (5, 6) for power take-off. The connection of the first and second parts of the reduction gear is carried out through the hydraulic motor (13), which is made reversible, like the hydraulic pump (11) connected to it hydraulically. The second part of the reduction gear is equipped with a mechanism for selective switching of rotation speeds by the flanges (5,6) for power take-off, as well as a mechanism for selectively switching on and off the rotation of one of the flanges (5) for power take-off.

Description

The utility model relates to transmission units of vacuum sweepers using an additional hydraulic transmission and changing the number of driving wheels.

Known distributing-drive unit for vacuum sweeper KO-309 [1, Zasov IA and other Machines for the repair and cleaning of urban roads. M: Stroyizdat, 1988, Art. 34, fig. 11], located on the side of the gearbox and containing a housing with a reduction gear in it and with flanges protruding beyond it for power take-off to the working bodies of the machine (sweeping brushes, fan) located in the rear part, as well as to the hydraulic system pump.

The disadvantages of such a node is its fastening to the side of the gearbox of the vacuum sweeper, which limits the power take-off to a quantitative level not higher than 30 - 35% of the power of the internal combustion engine, due to the insufficient load capacity of the reverse gear located in the housing of the distributing drive unit - tooth strength and bearing life.

In addition, due to its layout and the way the driven selection shafts for the hydraulic system pumps are placed in it, power is not taken off to the working bodies of the machine located in its front part. Moreover, since the mentioned pumps are located at a distance from the dispensing-drive unit, the entire control system of the vacuum sweeper is complicated due to the need to use bulky numerous connecting communications.

These shortcomings are eliminated in the distributing-drive unit for a vacuum sweeper and harvester [2, Reducer KO-326. Internet resource - https://www.kommash.com/?zapchasti=1&cataloq_list=78#!prettvPhoto[qallery1/1/. Access date 20.04.2022], taken as a utility model prototype. Such an assembly contains a housing with a reduction gear in it and with flanges protruding beyond it for connection to the engine of a vacuum sweeper and for power take-off, as well as hydraulic pumps connected to the housing driven by the said reduction gear.

However, the disadvantage of such a distributing-drive unit - a prototype is its low functionality for controlling the units of a vacuum sweeper - a cleaning machine, in particular, duplicating with it the movement of the chassis of such a machine in order to increase maneuverability in hard-to-reach places of cleaning.

Therefore, the objective of the utility model is to expand the functionality of the dispensing and driving unit of the vacuum sweeper.

This goal is achieved by the fact that (Fig. 1 and 2) in the dispensing-drive unit (1) for a vacuum sweeper, containing a housing (2) with a reduction gear (3) in it and with flanges protruding beyond it (4 -5) for connection with the engine (7) of a vacuum sweeper and for power take-off, as well as hydraulic pumps (9-11) attached to the housing (2), driven by the mentioned reduction gear (3), there are distinctive features: a hydraulic motor (13) is fixed on the body (2), connected hydraulically to the hydraulic pump (11) and mechanically to the said reduction gear (3).

Such distinguishing features will make it possible to provide duplication of the movement control of the sweeper chassis not only through a mechanical transmission, but also with the help of a hydraulic drive, which will increase the functionality of the unit according to the utility model.

Additional distinctive features of the utility model aimed at enhancing the effects mentioned above:

- hydraulic pumps (9,10) are connected to a reduction gear (3) through spring-loaded controlled clutches (12);

- reduction gear (3) is formed from two parts, the first of which is made with the ability to control the operation of hydraulic pumps (9-11), and the second with the ability to transfer rotation to the flanges (5,6) for power take-off;

- the connection of the first and second parts of the reduction gear (3) is carried out through the hydraulic motor (13);

- the hydraulic pump (11) connected hydraulically to the hydraulic motor (13) and the hydraulic motor (13) itself are reversible;

- the second part of the reduction gear (3) is equipped with a mechanism for selective switching of rotation speeds by flanges (5,6) for power take-off;

- the second part of the reduction gear (3) is equipped with a mechanism for selectively turning on and off the rotation of one of the flanges (5) for power take-off.

The essence of the utility model is represented by illustrations, where:

- in Fig. 1 shows a general view of the distributing-drive unit;

- in Fig. 2 - its kinematic diagram.

The dispensing-drive unit (1) for a vacuum sweeper contains a housing (2) with a reduction gear (3, Fig. 2) in it and with flanges (4-6) protruding beyond it. In this case, the flange (4) serves to connect to the engine (7, Fig. 2) of the vacuum sweeper, for example, an internal combustion engine, or an electric motor, through the cardan shaft (8); and flanges (5, 6) - for power take-off, respectively, to its front and rear axles, for example, also through similar cardan shafts (8, in Fig. 2 are shown partially).

Hydraulic pumps (9-11) are attached to the housing (1), driven by the said reduction gear (3, Fig. 2,). Moreover, such a connection of hydraulic pumps (9,10), which serve to ensure the operability of the working equipment of the vacuum sweeper, is carried out through spring-loaded controlled clutches (12).

Also, a hydraulic motor (13) is fixed on the body (1), connected hydraulically to the hydraulic pump (11), forming a hydrostatic drive, and mechanically - to the said reduction gear (3).

The reduction gear (3) is formed from two parts, the first of which

The first part of it includes the engagement of helical gears (14-17) set rigidly, respectively:

- helical gear (14) on the input shaft (18), connected through the flange (4) and cardan shaft (8) to the engine (7):

- helical gear (15) on the upper axle (19), connected, through the first rigid clutch (20), with the hydraulic pump (11), which is made, for example, reversible;

- helical gear (16) on the first output shaft (21) connected through one spring-loaded controlled clutch (12) to the hydraulic pump (9);

- helical gear (17, designations are conventionally placed) on the second output shaft (22) connected via another spring-loaded controlled clutch (12) to the hydraulic pump (10).

The second part of the reduction gear (3) is equipped with a mechanism for selective switching of rotation speeds by flanges (5,6) for power take-off. To do this, it includes, for example, the engagement of double gears (23,24), respectively, with gears (25,26) and the engagement of a spur gear (27) with a spur gear (28).

Double gears (23,24) are seated through double-row bearings (29) on a drive shaft (30) connected via a second rigid coupling (31) to a hydraulic pump (11), which is also reversible, for example. On the drive shaft (30) is also firmly planted between the double gears (23,24) intermediate gear (32), which is selectively engaged either (as shown in Fig. 2) with a double gear (23) or with a double gear (24), with the possibility of switching these two positions using a parasitic gear (33) connected to the first controlled cylinder (34) from a fluid under pressure (or from a working fluid, or from compressed air).

The gear wheels (25,26) are rigidly mounted on the lower axle (35) located in the housing (2) on conical bearings (36) and connected through a flange (6) to the cardan shaft (8) for power take-off to the rear axle of the vacuum sweeper. cleaning machine.

The second part of the reduction gear (3) is also equipped with a mechanism for selectively turning on and off the rotation of the flange (5) for taking power to the front axle of the chassis of the vacuum sweeper.

To do this, a spur gear (27) is also rigidly mounted on the lower axle (35), which is engaged with a spur gear (28), which is rigidly mounted on a hollow shaft (37) with a friction collar (38).

Inside the hollow shaft (37) in plain bearings (39) there is an output shaft (40), connected through a splined bushing (41) and a flange (5) with a cardan shaft (8) for power take-off to the front axle of the vacuum sweeper. Moreover, the output shaft (40) is located with the possibility of longitudinal movement inside the plain bearings (39) and inside the splined bushing (41). A crown (42) is also rigidly mounted on the output shaft (40), inside which the friction shoulder (38) of the hollow shaft (37) is initially located with a gap. The crown (42) is connected to the second controlled cylinder (43) from a pressurized fluid (either from a working fluid or from compressed air).

The principle of operation of such a distributing-drive unit (1) is as follows.

From the engine (7) of the vacuum sweeper, through the cardan shaft (8), the main rotation is transmitted to the flange (4) of the input shaft (18), which drives the first part of the reduction gear (3) inside the housing (2) of the distributing drive node (1).

As a result, hydraulic pumps (9-11) start working. Moreover, two hydraulic pumps (9,10) will be switched on as needed by means of external action (not shown) on spring-loaded controlled clutches (12).

The hydraulic pump (11) rotates constantly and drives the hydraulic motor (13) by means of a hydrostatic drive - with the working fluid to a certain port selectively (reversely) from the impact from the control station (not shown), also reversing the rotation of the hydraulic motor (13), which through the drive shaft (30) actuates the second part of the reduction gear (3) inside the housing (2) of the distributing-drive unit (1).

As a result, through the flanges (5, 6) and cardan shafts (8) the vacuum sweeper chassis moves forward or backward. And the range of speeds of such movement is changed by forcibly supplying fluid under pressure or removing this supply to the first controlled cylinder (34), which puts the parasitic gear (34) into engagement with either a double gear (24) or a double gear (23), and they rotate, respectively, either the gear wheel (26) or the gear wheel (25), setting the desired rotational speed of the lower axle (35), which drives through the flange (8) and the cardan shaft (8) the rear axle of the chassis of the vacuum sweeper .

Its front chassis axle is driven via a flange (5) and a cardan shaft (8) by forcing a pressurized fluid into the second control cylinder (43). As a result, the crown (42) of the output shaft (40) engages with the friction shoulder (38) of the hollow shaft (37), which transmits rotation to the output shaft (40), splined bushing (41), flange 5 and cardan shaft (8), which carries out the work of the chassis bridge of the vacuum sweeper. This selectively ensures its work on the wheel formulas "4×2" and "4×4".

As a result, the distributing-drive unit (1) according to the utility model has the following advantages:

- simplicity of design;

- Ease of controls;

- multifunctionality;

- versatility of application.

Sources of information:

1. Zasov I.A. and other Machines for the repair and cleaning of urban roads. M: Stroiizdat, 1988, Art. 34, fig. eleven.

2. Reducer KO-326. Electronic resource -https://www.kommash.com/?zapchasti=1&catalog_list=78#!prettyPhoto[gallery1]/1/. Access date 04/20/2022 /Prototype/.

LIST of reference symbols in the figures and names of elements to which these symbols refer

Claims (7)

1. Dispensing and driving unit (1) for a vacuum sweeper, containing a housing (2) with a reduction gear (3) in it and with flanges (4,5) protruding beyond it for connection with an engine (7) of a vacuum sweeper - a harvester and for power take-off, as well as hydraulic pumps (9-11) attached to the body (2), driven by the mentioned reduction gear (3), characterized in that a hydraulic motor (13) is fixed on the body (2), connected hydraulically with the hydraulic pump (11) and mechanically with the mentioned reduction gear (3). 2. The unit according to claim 1, characterized in that the hydraulic pumps (9,10) are connected to the reduction gear (3) through spring-loaded controlled clutches (12). 3. The assembly according to claim 1, characterized in that the reduction gear (3) is formed from two parts, the first of which is configured to control the operation of hydraulic pumps (9-11), and the second is capable of transmitting rotation to the flanges (5.6 ) for power take-off. 4. The unit according to claim 3, characterized in that the connection of the first and second parts of the reduction gear (3) is carried out through a hydraulic motor (13). 5. The assembly according to claim 4, characterized in that the hydraulic pump (11) connected hydraulically to the hydraulic motor (13) and the hydraulic motor (13) itself are reversible. 6. The unit according to claim 4, characterized in that the second part of the reduction gear (3) is equipped with a mechanism for selective switching of rotation speeds by flanges (5,6) for power take-off. 7. The unit according to claim 4, characterized in that the second part of the reduction gear (3) is equipped with a mechanism for selectively turning on and off the rotation of one of the flanges (5) for power take-off.

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