CN218162108U - Connecting device, hydraulic motor driving fan and engineering machinery - Google Patents

Abstract

The utility model discloses a connecting device, a hydraulic motor driving fan and an engineering machine, wherein the connecting device comprises a main shaft, an end cover, a shell, a front bearing and a rear bearing; the main shaft and the shell are supported through a front bearing and a rear bearing, and the end cover is sleeved on the main shaft and then connected with the shell; the limit of the front bearing is limited by the end cover and the spindle shoulder, and the limit of the rear bearing is limited by the shell and the spindle shoulder. The utility model has the capability of bearing radial load and axial load, and finally transmits the bearing load to the frame for offsetting, so that the hydraulic motor does not bear extra load any more, and only transmits the torque required by the rotation of the fan; the utility model improves the load environment of the hydraulic motor, the model selection does not need to consider the capability of the main shaft of the hydraulic motor for bearing radial load and axial load, and the model selection limit range of the hydraulic motor for driving the fan is enlarged; the failure rate of the hydraulic motor for driving the fan is reduced, and the service life of the hydraulic motor is greatly prolonged.

Description

Connecting device, hydraulic motor driving fan and engineering machinery

Technical Field

The utility model relates to a hydraulic motor drive connecting device for fan belongs to the engineering machine tool field.

Background

The excavator is at the operation in-process, in order to satisfy the normal operating of complete machine, there are two aspects heat dissipation demands: heat dissipation of the hydraulic system and heat dissipation of the engine system. The heat of the hydraulic system comes from various energy losses of system pressure loss, pressure impact, internal leakage and overflow, and finally the heat is transferred to hydraulic oil, and the hydraulic oil is forcedly radiated by a radiator under normal conditions, so that the hydraulic oil temperature meets the working requirement. The heat of the engine system is generated by the body heat engine to do work and transfer to cooling water through internal water circulation, and the cooling water completes heat dissipation through the radiator.

The heat dissipation of the radiator is realized by blowing or sucking air to the radiator by a fan, and the heat is taken away by the flowing air, so that the whole heat exchange process is completed.

Under the current trend of energy conservation and emission reduction, more and more engineering machinery cooling fans are driven by hydraulic motors instead of engine flywheels, so that the controllability of the rotating speed of the fans is improved, the rotating speed is freely adjusted according to the system requirement, the cooling requirement is optimally matched, and the energy consumption of the fans is reduced.

In practical engineering application, the fan is generally in rigid direct connection with a main shaft of the hydraulic motor through a coupler, and the mode is simple to install and maintain and has no mechanical loss; on one hand, the fan, the coupler and the hydraulic motor are fixed to the frame, a cantilever load is formed on the motor, and the self gravity and the vibration of the whole machine generate a large radial load on a motor shaft; on the other hand, the rotating fan is used as the load specificity, air is disturbed to generate wind in the process of high-speed rotation, and the wind pressure forms axial load, namely thrust or pulling force, on the fan, and the thrust or pulling force is transmitted to the motor through the coupler and then counteracted through the frame for fixing the motor. Because the hydraulic motor bears larger radial and axial loads, the type selection of the driving hydraulic motor for the fan is extremely limited, the motor faults caused by the radial and axial loads of the motor are increasingly increased, the service life of the motor is generally short, and the fan driving hydraulic motor belongs to a difficult problem.

SUMMERY OF THE UTILITY MODEL

According to prior art's not enough, the utility model provides a connecting device has solved drive hydraulic motor for radiator fan operation fault rate height, the restricted technical problem of lectotype.

The utility model discloses realize according to following technical scheme:

the utility model discloses a first aspect of a connecting device, which comprises a main shaft, an end cover, a shell, a front bearing and a rear bearing; the main shaft and the shell are supported through a front bearing and a rear bearing, and the end cover is sleeved on the main shaft and then connected with the shell; the limit of the front bearing is limited by the end cover and the spindle shoulder, and the limit of the rear bearing is limited by the shell and the spindle shoulder.

In some embodiments, a shaft seal is mounted between the end cap and the circumferential surface of the spindle facing each other.

In some embodiments, a circle of groove is formed on the circumferential surface of the end cover, a circlip is arranged in the groove, and the shaft seal is limited and fixed through the circlip.

In some embodiments, the axial surface of the shell is provided with a threaded hole, the end cover is provided with a through hole, and the end cover and the shell are fixed together through a screw.

The utility model discloses a hydraulic motor driving fan in the second aspect, which comprises a fan, a frame, a hydraulic motor and the connecting device; the fan is connected with one end of the connecting device, and the other end of the hydraulic motor is connected with the connecting device and then is installed on the frame.

In some embodiments, the main shaft is provided with an internal spline, the rotating shaft of the hydraulic motor is provided with an external spline, and the rotating shaft of the hydraulic motor is inserted from the shell and then is connected with the internal spline on the main shaft in a matching manner.

In some embodiments, a central disk in the fan is fixedly sleeved on a main shaft outside the end cover.

In some embodiments, the end cover, the housing, the shaft seal between the end cover and the housing, and the end face of the hydraulic motor D form a closed cavity, and the interior of the closed cavity is filled with lubricating grease.

The third aspect of the utility model discloses an engineering machine, which is provided with the connecting device; alternatively, the hydraulic motor-driven fan described above is mounted.

In some embodiments, the work machine comprises an excavator.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the hydraulic motor has the capability of bearing radial load and axial load, and finally transmits the bearing load to the frame for offsetting, so that the hydraulic motor does not bear extra load any more and only transmits torque required by the rotation of the fan;

2. the load environment of the hydraulic motor is improved, the capability of a main shaft of the hydraulic motor for bearing radial load and axial load is not required to be considered in the model selection, and the model selection limiting range of the hydraulic motor for driving the fan is expanded;

3. the load environment of the hydraulic motor is improved, the failure rate of the hydraulic motor for driving the fan is reduced, and the service life of the hydraulic motor is greatly prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments and that for a person skilled in the art, other drawings can also be derived from them without inventive effort.

In the drawings:

fig. 1 is a schematic structural view of a connecting device of the present invention;

in fig. 1: 1. a main shaft; 2. an end cap; 3. a screw; 4. a housing; 5. a rear bearing; 6. a front bearing; 7. shaft sealing; 8. circlip.

Fig. 2 is a schematic view of the application and installation of the connecting device of the present invention;

in fig. 2: A. a fan; B. a connecting device; C. a frame; D. a hydraulic motor.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1, a connecting device comprises a main shaft 1, an end cover 2, a screw 3, a shell 4, a rear bearing 5, a front bearing 6, a shaft seal 7 and an elastic retainer ring 8; the main shaft 1 and the shell 4 are supported through a front bearing 6 and a rear bearing 5, the front bearing 6 is limited by an end cover 2 and a shaft shoulder of the main shaft 1, the rear bearing is limited by the shell 4 and the shaft shoulder of the main shaft 1, the shaft seal 7 is installed between the end cover 2 and the main shaft 1 and is limited and fixed through an elastic retainer ring 8, and the end cover 2 and the shell 4 are fastened and connected together through a screw 3.

Referring to fig. 2, a hydraulic motor driven fan includes a fan a, a connecting device B, a frame C, and a hydraulic motor D; the fan A is directly connected with the connecting device B, the rotating shaft of the hydraulic motor D is inserted from the shell 4 and then is connected with the inner spline on the main shaft 1 in a matching way, and the fan A and the connecting device B are installed on the frame C together.

With reference to fig. 2, the fan a generates radial load and axial load during rotation, the load is borne by the main shaft 1 of the direct connection device B, and as shown in fig. 1, the front bearing 6 and the rear bearing 5 support the main shaft 1, have the capability of bearing radial load and axial load, transmit the borne load to the housing 4, and finally transmit the borne load to the vehicle frame C through the housing 4 of the connection device B for cancellation. In the whole process, the hydraulic motor D does not bear extra load any more, only transmits the torque required by the rotation of the fan A, improves the load environment of the hydraulic motor,

continuing with reference to FIG. 1: the main shaft 1 is provided with an internal spline and can be directly connected with a rotating shaft D of the hydraulic motor without an additional device, the axial size is small, and the installation is simple and compact. In addition, the end cover 2, the shell 4, the shaft seal 7 and the end face of the hydraulic motor D form a closed cavity, lubricating grease is filled inside the closed cavity, the high-speed rotating bearing can be lubricated in real time, the working requirement of the bearing is met, and efficient working is guaranteed.

In summary, the present invention provides a connecting device for a hydraulic motor driven fan, which has the capability of bearing radial load and axial load, and finally transmits the bearing load to a frame for offsetting, so that the motor does not bear extra load any more, and only transmits the torque required by the rotation of the fan; the connecting device improves the load environment of the hydraulic motor, the model selection does not need to consider the capability of a main shaft of the hydraulic motor for bearing radial load and axial load, and the model selection limiting range of the hydraulic motor for driving the fan is expanded; the failure rate of the hydraulic motor for driving the fan is reduced, and the service life of the hydraulic motor is greatly prolonged.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments by utilizing the above technical contents without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical matters of the present invention are within the scope of the present invention.

Claims (10)

1. A connection device, characterized by:

comprises a main shaft, an end cover, a shell, a front bearing and a rear bearing;

the main shaft and the shell are supported through a front bearing and a rear bearing, and the end cover is sleeved on the main shaft and then connected with the shell;

the limit of the front bearing is limited by the end cover and the spindle shoulder, and the limit of the rear bearing is limited by the shell and the spindle shoulder.

2. A connection device according to claim 1, characterized in that:

and a shaft seal is arranged between the end cover and the circumferential surface opposite to the main shaft.

3. A connection device according to claim 2, characterized in that:

the circumferential surface of the end cover is provided with a circle of groove, an elastic check ring is arranged in the groove, and the shaft seal is limited and fixed through the elastic check ring.

4. A connection device according to claim 1, characterized in that:

the shaft surface of the shell is provided with a threaded hole, the end cover is provided with a through hole, and the end cover and the shell are fixed together through a screw.

5. A hydraulic motor driven fan, comprising:

comprising a fan, a frame, a hydraulic motor and a connection device according to any one of claims 1 to 4;

the fan is connected with one end of the connecting device, and the other end of the hydraulic motor is connected with the connecting device and then installed on the frame.

6. A hydraulic motor driven fan as claimed in claim 5, wherein:

the main shaft is provided with an internal spline, an external spline is arranged on a rotating shaft of the hydraulic motor, and the rotating shaft of the hydraulic motor is connected with the internal spline on the main shaft after being inserted from the shell.

7. The hydraulic motor-driven fan according to claim 5, wherein:

a central disc in the fan is fixedly sleeved on a main shaft positioned outside the end cover.

8. The hydraulic motor-driven fan according to claim 5, wherein:

and the end cover, the shell, the shaft seal between the end cover and the shell and the end face of the hydraulic motor D form a closed cavity, and lubricating grease is filled in the closed cavity.

9. A construction machine characterized in that:

mounting the connecting device of any one of claims 1 to 4; alternatively, a hydraulic motor driven fan according to any one of claims 5 to 8 is installed.

10. A working machine according to claim 9, characterized in that:

the work machine includes an excavator.

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