CN217633583U

CN217633583U - Forced cooling brake for tractor

Info

Publication number: CN217633583U
Application number: CN202221528652.9U
Authority: CN
Inventors: 董红兵
Original assignee: Weifang Linlida Machinery Co ltd
Current assignee: Weifang Linlida Machinery Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-10-21
Anticipated expiration: 2032-06-14

Abstract

The utility model discloses a tractor forced cooling stopper, including connecting the braking casing between tractor wheel hub and tractor gearbox, be equipped with the braking cavity in the braking casing, install the braking piston that the terminal surface was static friction piece concurrently in the braking cavity and with braking piston braking complex dynamic friction piece, the bottom of braking cavity is equipped with the oilhole of crossing that communicates with the cavity bottom of tractor gearbox, the body upper portion of braking casing is equipped with the inlet port that sprays that is connected with the circulative cooling system's of tractor gearbox end of producing oil, the body inner wall of braking casing is equipped with towards the inside hole mouth that sprays of braking cavity corresponding to spraying the inlet port, it is located the braking cavity top that the non-braking terminal surface of braking piston corresponds to spray the hole mouth. The utility model discloses an establish on the upper portion of stopper and spray the inlet port and spray the hole mouth, for the inside forced circulation cooling that carries out of stopper with the help of current circulative cooling system in the tractor gearbox, the cooling effect is better, has better market spreading value.

Description

Forced cooling brake for tractor

Technical Field

The utility model relates to a tractor stopper technical field especially relates to a tractor forced cooling stopper.

Background

The tractor brake has the functions of decelerating the tractor during running or field operation, assisting turning or stopping. At present, an annular piston wet brake is often adopted as a tractor brake, is widely applied to a high-horsepower tractor, and has the characteristics of smooth operation, safe and reliable braking, compact structure and the like. The working principle is as follows: after a driver steps on the brake pedal, brake fluid enters a closed area defined by the brake shell, the brake piston and the sealing ring through the brake oil inlet, and pushes the brake piston to move forwards to be in contact with the dynamic friction plate for braking, so that the tractor is decelerated or rapidly stopped.

During the braking, brake piston can produce a large amount of heats with the contact of dynamic friction piece, can accelerate brake piston and dynamic friction piece's wearing and tearing, thereby shorten the life of stopper, consequently present wet brake is located between tractor wheel hub and the tractor gearbox, dynamic friction piece installs on the tractor transaxle, gearbox oil in the tractor gearbox can communicate to the inside below of stopper, brake piston this moment, dynamic friction piece's lower part soaks in the gearbox oil of tractor gearbox, gearbox oil through in the tractor gearbox cools down for brake piston and dynamic friction piece, be equipped with the circulative cooling system who carries out the cooling for gearbox oil in the oil pan of tractor gearbox, a cooling for guaranteeing gearbox oil. However, since the gearbox oil is not circulated in the brake, only the lower parts of the brake piston and the dynamic friction plate are immersed in the gearbox oil for cooling, the upper part of the brake piston is provided with a cooling blind area which cannot be contacted by the gearbox oil, so that the overall cooling effect of the brake is poor, and the service life of the brake is short; because the distance between the gearbox oil at the lower part of the brake and the gearbox is longer, although the gearbox oil at the position has fluidity with the gearbox oil at the gearbox of the tractor, the distance between the gearbox oil at the position and the gearbox oil in the gearbox of the tractor is longer, the interchange performance of the gearbox oil and the gearbox oil in the gearbox of the tractor is poorer, so that a circulating cooling system in the gearbox of the tractor cannot well cool the gearbox oil at the lower part of the brake, the temperature of the gearbox oil at the position is higher, and the braking effect of the brake is poorer; especially when the tractor runs on uneven road surface, once the gearbox oil at the brake flows into the gearbox of the tractor in an inclined way for a long time, the brake can not be effectively cooled at the moment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a tractor forced cooling brake that simple structure, reasonable in design, cooling effect are better, with low costs, can keep the effective cooling of stopper throughout is provided.

In order to solve the technical problem, the technical scheme of the utility model is that: tractor forced cooling stopper, including connecting the braking casing between tractor wheel hub and tractor gearbox, be equipped with the braking cavity in the braking casing, install the terminal surface in the braking cavity and do the brake piston of static friction piece concurrently and with brake piston braking complex dynamic friction piece, the bottom of braking cavity is equipped with the oilhole of crossing of the cavity bottom intercommunication with the tractor gearbox, the body upper portion of braking casing is equipped with the oil outlet end that at least one is connected with the circulative cooling system of tractor gearbox and sprays the inlet port, the body inner wall of braking casing correspond to it is equipped with the orientation to spray the inlet port the inside hole mouth that sprays of braking cavity, it is located to spray the hole mouth the non-braking terminal surface of brake piston corresponds braking cavity top.

Preferably, the spray nozzle is disposed right above the brake housing.

As a preferable technical scheme, two or more spraying oil inlet holes are formed in the upper portion of the body of the brake shell.

As a preferable technical scheme, the diameter of the spraying orifice is 1-3mm.

As a preferable technical scheme, the brake piston is transversely slidably mounted in the brake housing, a brake oil inlet matched with a non-brake end face of the brake piston is arranged on the brake housing, and the dynamic friction plate is mounted on the brake end face of the brake piston.

By adopting the technical scheme, the tractor forced cooling brake comprises a brake shell connected between a tractor hub and a tractor gearbox, wherein a brake cavity is arranged in the brake shell, a brake piston with an end face serving as a static friction plate and a dynamic friction plate in braking fit with the brake piston are arranged in the brake cavity, an oil passing hole communicated with the bottom of the cavity of the tractor gearbox is formed in the bottom of the brake cavity, at least one spraying oil inlet hole connected with the oil outlet end of a circulating cooling system of the tractor gearbox is formed in the upper part of the body of the brake shell, a spraying hole nozzle facing the interior of the brake cavity is formed in the inner wall of the body of the brake shell corresponding to the spraying oil inlet hole, and the spraying hole nozzle is positioned above the brake cavity corresponding to the non-braking end face of the brake piston;

the utility model has the advantages that: the utility model discloses with the help of having now the cooling system that circulates on the tractor gearbox forces the cooling for the stopper, through cooling system's circulating pump, will gearbox oil in the tractor gearbox leads to in the brake housing through forcing shower, spraying inlet port to spray through the hole mouth in the brake chamber, because the hole mouth that sprays is the aperture, just the circulating pump has certain pressure when producing oil, makes by the gearbox oil that the hole mouth that sprays discharged into in the brake chamber is vaporific and fills up whole brake chamber fast in, then contacts to brake piston, dynamic friction piece surface, especially contact the upper portion of brake piston, dynamic friction piece, for the easy high temperature place in whole stopper especially brake piston upper portion makes pointed cooling, finally collect again to in the gearbox oil below, compare below the liquid level that only has the lower part to dip gearbox oil in the prior art, the utility model discloses an upper portion for brake piston, dynamic friction piece also cools down to improve the effect of the whole cooling of stopper, can effectively guarantee the braking security complexity of tractor in operation adverse circumstances in the field; through this kind of mode can make the gearbox oil circulation of stopper lower part flow, improved the mobility of gearbox oil, its and tractor gearbox oil in the gearbox's exchange case better, radiator fan can be fine for gearbox oil cools down, improves the cooling effect of stopper promptly.

Drawings

The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at I of FIG. 1;

in the figure: 1-a tractor hub; 2-a tractor gearbox; 3-a brake housing; 4-a brake chamber; 5-a brake piston; 6-moving the friction plate; 7-a brake oil inlet; 8-spraying an oil inlet; 9-spraying hole nozzle.

Detailed Description

The invention is further explained below by referring to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1 and fig. 2, the tractor forced cooling brake includes a brake housing 3 connected between a tractor hub 1 and a tractor transmission case 2, a brake cavity 4 is provided in the brake housing 3, a brake piston 5 having an end face also serving as a static friction plate and a dynamic friction plate 6 brake-fitted with the brake piston 5 are installed in the brake cavity 4, an inner circumference of the dynamic friction plate 6 is fixed on a tractor drive axle through a spline, an outer circumference of the dynamic friction plate 6 and an inner circumference of the brake housing 3 are in transition fit, the brake piston 5 is transversely slidably installed in the brake housing 3, the brake piston 5 and the inner circumference of the brake housing 3 are in transition fit, a sealing ring is installed at a fitting surface between the two, a brake oil inlet 7 fitted with a brake end face of the brake piston 5 is provided on the brake housing 3, the dynamic friction plate 6 is installed at a non-brake end face of the brake piston 5, brake oil enters the brake end face of the brake piston 5 through the brake oil inlet 7, and pushes the brake piston 5 to slide toward one side of the dynamic friction plate 6, thereby contacting and fitting with the dynamic friction plate 6, so as to realize brake; the structures of the brake piston 5 and the dynamic friction plate 6 are the prior art, and are not described in detail herein.

Referring to fig. 2, an oil hole communicated with the bottom of the cavity of the tractor transmission case 2 is formed in the bottom of the brake cavity 4, so that transmission case oil in the tractor transmission case 2 can horizontally spread to the bottom of the brake cavity 4, and the lower portions of the brake piston 5 and the dynamic friction plate 6 are guaranteed to be immersed below the liquid level of the transmission case oil. The body upper portion of braking casing 3 is equipped with one and sprays inlet port 8, it is connected with the circulative cooling system's of tractor gearbox 2 play oil end through forcing the shower to spray inlet port 8, the body inner wall of braking casing 3 corresponds to it is equipped with the orientation to spray inlet port 8 the inside hole mouth 9 that sprays of braking cavity 4, it is located to spray hole mouth 9 the non-braking terminal surface of brake piston 5 corresponds braking cavity 4 top. During braking, the internal circulation cooling system of the tractor gearbox 2 introduces gearbox oil from the outside of the brake to the spraying oil inlet 8 through the forced spraying pipe, and finally the gearbox oil is sprayed into the braking cavity 4 through the spraying hole nozzle 9 to cool the braking piston 5 and the dynamic friction plate 6 in the braking cavity 4.

In this embodiment, it is provided with one, corresponds to spray inlet port 8 spray the orifice mouth 9 and be provided with one, certainly spray inlet port 8 also can be equipped with two or more, correspond spray orifice mouth 9 and also be provided with two or more, after a large amount, it spouts into the volume of the gearbox oil in the braking cavity 4 is more, and the cooling effect can be more obvious.

Because the dynamic friction plate 6 can drive the rotation under the effect of the tractor drive axle, so can contact a small amount of gearbox oil on the braking terminal surface between brake piston 5 and the dynamic friction plate 6, can be for the braking terminal surface of brake piston 5 plays partial cooling effect, but the non-braking terminal surface department of opposite side of brake piston 5 is difficult to contact gearbox oil, consequently for improving the cooling effect of the non-braking terminal surface of brake piston 5, spray hole mouth 9 sets up and is lieing in one side that brake piston 5 kept away from dynamic friction plate 6, promptly spray hole mouth 9 sets up the non-braking terminal surface of brake piston 5 corresponds braking cavity 4 top, by like this spray hole mouth 9 spun gearbox oil can direct contact brake piston 5's non-braking terminal surface and brake housing 3's internal surface, the both sides terminal surface of brake piston 5 and the both sides terminal surface of dynamic friction plate 6 homoenergetic contact gearbox oil this moment, and the cooling effect obviously obtains promoting.

The spraying oil inlet hole 8 and the spraying hole nozzle 9 are arranged right above the brake shell 3 and spray downwards from the right above, so that more transmission oil can be ensured to be in direct contact with the brake piston 5 and the dynamic friction plate 6.

The diameter of the spray hole nozzle 9 is 1-3mm, the spray hole nozzle 9 is set to be in a small hole form, under the oil outlet pressure of a circulating cooling system of a tractor gearbox 2, gearbox oil sprayed out of the spray hole nozzle 9 is in a mist form with certain pressure, the whole brake cavity 4 can be filled with the gearbox oil quickly, the brake piston 5 is in surface contact with the dynamic friction plate 6, and a good cooling effect is achieved.

The circulative cooling system is including setting up the oil casing of 2 bottoms of tractor gearbox, the gearbox oil is equipped with in the oil casing, brake piston 5 with the lower part of friction disc 6 is soaked extremely below the liquid level of gearbox oil, still include filter and circulating pump in the circulative cooling system, force the shower to be connected to the play oil end of circulating pump, still be provided with on the circulative cooling system and be had gearbox oil carries out radiating radiator fan and drive radiator fan's radiator fan. The circulating cooling system is used for carrying out circulating lubrication and cooling on a transmission gear in the tractor gearbox 2. Through the circulation flow of gearbox oil is realized to the circulating pump, utilizes simultaneously radiator fan is for gearbox oil cools down, guarantees that gearbox oil low temperature effectively cools down all the time. The circulating cooling system is prior art and will not be described in detail herein.

When in work, the dynamic friction plate 6 is driven by the driving axle to rotate, and the gearbox oil immersed below the dynamic friction plate can be carried in the rotating process, so that the oil of the gearbox contacts the surface of the brake piston 5 to cool the brake piston 5 and the dynamic friction plate 6, but since the upper part of the brake piston 5 is only exposed to a small amount of transmission oil when the dynamic friction plate 6 rotates, the cooling effect is limited, so that the upper part of the brake piston 5 is easy to have high temperature, the brake effect is influenced, therefore, the utility model carries out forced cooling for the brake by means of the circulating cooling system on the gear box 2 of the existing tractor, the gearbox oil in the tractor gearbox 2 is introduced into the brake through the forced spraying pipe and the spraying oil inlet hole 8 by the circulating pump of the circulating cooling system and is sprayed to the upper part of the brake cavity 4 through the spraying hole nozzle 9, because the spray hole nozzles 9 are small holes and the circulating pump has a certain pressure when oil is discharged, the gearbox oil discharged from the spray hole nozzles 9 is in a mist shape and quickly fills the whole brake cavity 4, and directly contacts the surfaces of the brake piston 5 and the dynamic friction plate 6, particularly the upper parts of the brake piston 5 and the dynamic friction plate 6 and the non-braking end surface of the brake piston 5, the temperature of the whole brake, particularly the high-temperature-prone part of the upper part of the brake piston 5, is pertinently reduced, and finally the gearbox oil is collected into the gearbox oil below, compared with the prior art that only the lower part of the brake piston 5 is immersed below the liquid level of the transmission oil, the upper parts of the brake piston 5 and the dynamic friction plate 6 are also cooled, thereby improving the overall cooling effect of the brake and effectively ensuring the braking safety of the tractor in the complicated severe environment of field operation. Through the spraying type forced cooling, the brake can be always kept at the normal working temperature, and the braking effect is good. Simultaneously, can make the gearbox oil circulation of stopper lower part flow through this kind of mode, improve the mobility of gearbox oil in the stopper, it is better with the interchange box of gearbox oil in the tractor gearbox 2, can guarantee like this that gearbox oil can be by the fine cooling of radiator fan, improved the cooling effect of stopper.

The utility model discloses a set up on the stopper and spray hole mouth 9 to through forcing the shower will spray oil inlet 8 and the tractor in the tractor current circulative cooling system is connected in the tractor gearbox 2, realize forced circulation cooling for the stopper with the help of current circulative cooling system, its simple structure, reasonable in design does not change the cost to original structure, the system of current tractor simultaneously.

The foregoing shows and describes the general principles, essential features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Tractor cooling brake by force, including connecting the braking casing between tractor wheel hub and the tractor gearbox, be equipped with the braking cavity in the braking casing, install in the braking cavity terminal surface concurrently be the static friction disc brake piston and with brake piston braking complex dynamic friction piece, the bottom of braking cavity is equipped with the oilhole of crossing that communicates with the cavity bottom of tractor gearbox, its characterized in that: the body upper portion of braking casing is equipped with at least one and sprays the inlet port of being connected with the circulative cooling system's of tractor gearbox oil outlet, the body inner wall of braking casing corresponds to it is equipped with the orientation to spray the inlet port the inside hole mouth that sprays of braking cavity, it is located to spray the hole mouth the non-braking terminal surface of brake piston corresponds braking cavity top.

2. The tractor forced cooling brake as claimed in claim 1, characterized in that: the spraying hole nozzle is arranged right above the brake shell.

3. The tractor forced cooling brake as defined in claim 1, wherein: and two or more spraying oil inlet holes are formed in the upper part of the body of the brake shell.

4. The tractor forced cooling brake as defined in claim 1, wherein: the diameter of the spraying hole nozzle is 1-3mm.

5. The tractor forced cooling brake as defined in any one of claims 1 to 4, wherein: the brake piston is transversely installed in the brake shell in a sliding mode, a brake oil inlet matched with the non-brake end face of the brake piston is formed in the brake shell, and the dynamic friction plate is installed on the brake end face of the brake piston.