CN218235921U

CN218235921U - Brake cooling structure and transaxle

Info

Publication number: CN218235921U
Application number: CN202222220536.7U
Authority: CN
Inventors: 吴志强; 庞飞虎
Original assignee: Guangdong Fuwa Engineering Manufacturing Co Ltd
Current assignee: Guangdong Fuwa Engineering Manufacturing Co Ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-01-06
Anticipated expiration: 2032-08-23

Abstract

The utility model discloses a brake cooling structure and a drive axle, wherein the axle wire of the brake cooling structure is positioned on a horizontal plane, and the brake cooling structure comprises a brake shell and a piston shell positioned outside the brake shell; the brake shell is sleeved on a half-axle sleeve at the end part of the axle housing, and the outer end of the brake shell is provided with an opening; the piston shell is used for the fixed cover to establish on the axle shaft sleeve pipe and cover and locate on the opening, piston shell and brake shell fixed connection and form one between the two and hold the chamber, oil inlet and oil-out have been seted up inwards to the outer terminal surface of piston shell, the oil inlet with hold the chamber intercommunication and be located the top of horizontal plane, the oil-out with hold the chamber intercommunication and be less than the oil inlet, the piston shell holds the chamber from oil inlet, oil-out orientation respectively and has seted up oil inlet, play oil duct, oil inlet and play oil duct with hold the chamber intercommunication. Through the structural design, the cooling oil forms pressure difference, the flow of the cooling oil is facilitated, heat can be sufficiently taken away, and the cooling effect is improved.

Description

Brake cooling structure and transaxle

Technical Field

The utility model relates to an automobile brake cooling technical field, concretely relates to stopper cooling structure and transaxle.

Background

The wet brake of heavy vehicle transaxle can produce a large amount of heats because of the long-time friction of the dynamic friction piece in its inner chamber and static friction piece when the braking, consequently, can set up the cooling structure with the intercommunication of stopper inner chamber in the stopper, carry the cooling oil to the stopper inner chamber through cooling structure, in order to cool off the stopper, current stopper cooling structure includes the piston shell, the outer terminal surface that the transaxle semi-axis terminal surface was kept away from to the piston shell is provided with an oil inlet and an oil-out with the intercommunication of stopper inner chamber, the oil inlet, the oil-out is respectively through advancing oil pipe, go out the oil tank intercommunication of oil pipe and transaxle, make the cooling oil in the oil tank can get into the inner chamber of stopper from the oil inlet, again from the oil-out backward flow to the oil tank in, however, the cooling effect of current stopper cooling structure is not good, lead to the performance reduction of stopper.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can improve cooling effect's stopper cooling structure and transaxle to prior art not enough.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a brake cooling structure, wherein the axis is positioned on a horizontal plane and comprises a brake shell and a piston shell positioned outside the brake shell;

the brake shell is sleeved on a half-axle sleeve at the end part of the axle housing, and the outer end of the brake shell is provided with an opening;

the piston shell is used for fixed cover to establish on the semi-axis sleeve pipe and cover and locate on the opening, the piston shell with brake shell fixed connection just forms one between the two and holds the chamber, oil inlet and oil-out have been seted up inwards to the outer terminal surface of piston shell, the oil inlet with hold the chamber intercommunication and be located the top of horizontal plane, the oil-out with hold the chamber intercommunication and be less than the oil inlet, the piston shell is respectively certainly the oil inlet the oil-out orientation hold the chamber and seted up oil inlet, oil outlet, the oil inlet with the oil outlet with hold the chamber intercommunication.

Further, the oil outlet is close to the horizontal plane relative to the oil inlet, and the oil inlet is located on a vertical plane perpendicular to the horizontal plane.

Further, the oil inlet and the oil outlet are close to the peripheral wall of the piston shell relative to the central axis, and an included angle between the oil inlet and the oil outlet is 90 degrees.

Furthermore, the number of the oil outlets is two, the two oil outlets are respectively located on two opposite sides of the half-shaft sleeve and the heights of the two oil outlets are equal.

Furthermore, the outer end face of the piston shell corresponds to the oil outlet channel and protrudes outwards to form a supporting portion, the supporting portion extends along the radial direction of the brake cooling structure and towards the central axis, the outer end face of the supporting portion protrudes outwards to form a boss, and the oil outlet channel penetrates outwards in the direction of the central axis through the boss to enable the boss to be located on the outer end face of the boss to form the oil outlet.

Further, the outer end of the piston shell is provided with a cover plate, the oil inlet and the oil outlet are formed in the outer plate surface of the cover plate, the oil outlet channel comprises a first oil channel and a second oil channel which are communicated with each other, the first oil channel is formed from the oil outlet inwards in the direction of the central axis, the second oil channel is formed from the inner end of the first oil channel inwards in the direction of the central axis, and the axis of the second oil channel deviates from the axis of the first oil channel towards the central axis.

Further, the diameter of the second oil duct is smaller than that of the first oil duct, and the second oil duct is located on one side, close to the central axis, of the first oil duct.

Further, the length of the second oil duct is D1, the outer end of the second oil duct intersects with the inner end of the first oil duct to form an intersection oil duct, the intersection oil duct is located between the two ends of the first oil duct, the length of the intersection oil duct is D2, and D2 is greater than or equal to 1/2D1 and is less than or equal to D2 and less than D1.

Furthermore, the piston housing is used for coating a brake piston of the brake, the cover plate is arranged outside the outer end surface of the brake piston in a covering manner, the second oil duct corresponds to the outer end surface of the brake piston, the inner end of the second oil duct extends downwards to form an oil return duct, and the oil return duct penetrates through the inner plate surface of the cover plate inwards to be communicated with the accommodating cavity.

The utility model also provides a drive axle, include the axle housing, be fixed in semi-axis sleeve pipe on the axle housing tip, locate the axle housing with semi-axis, cover in the semi-axis sleeve pipe are located stopper and the arbitrary embodiment of the aforesaid on the semi-axis sleeve pipe stopper cooling structure, stopper cooling structure locates on the stopper.

The utility model discloses a stopper cooling structure is located the oil inlet of horizontal plane top and the oil-out that is less than the oil inlet through the outer terminal surface setting at the piston shell for the coolant oil forms the pressure differential, is favorable to it to flow, and produced heat is taken away when can fully will moving friction disc and static friction disc braking, thereby improves the cooling effect, ensures that the stopper has good performance.

Drawings

Fig. 1 is a partial perspective view of the brake cooling structure of the present invention mounted on a driving axle;

FIG. 2 isbase:Sub>A partial schematic view ofbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 2;

FIG. 4 is a front view of the plunger housing of FIG. 1;

fig. 5 is a schematic view of another view of fig. 4.

Detailed Description

The invention will be further described with reference to the following drawings and detailed description:

as shown in fig. 1 to 5, the utility model provides a brake cooling structure for cooling brake 100 installs on the transaxle of engineering vehicle, specifically, the coolant oil is liquid form, and brake 100 is wet brake, and the stopper 100 inner chamber is equipped with brake piston 4 and is located the inboard static friction piece of brake piston 4 and dynamic friction piece, and the coolant oil gets into the stopper 100 inner chamber through brake cooling structure in order to cool off brake 100. The brake cooling structure comprises a brake housing 1 and a piston housing 2 located outside the brake housing 1, and the central axis of the brake cooling structure is located on a horizontal plane (not shown).

As shown in fig. 2 and fig. 3, the brake housing 1 is sleeved on a half axle sleeve 201 at the end of the axle housing 200, and an opening 10 is opened at the outer end thereof, and a friction plate is arranged in an inner cavity of the brake housing 1. The piston shell 2 covers the brake piston 4, is fixedly sleeved on the semi-axis sleeve 201 and covers the opening 10; the piston shell 2 is fixedly connected with the brake shell 1, and an accommodating cavity 3 is formed between the piston shell 2 and the brake shell 1, specifically, the inner end of the piston shell 2 is in clearance fit with the outer end of the brake shell 1, and the piston shell 2 and the brake shell 1 are fixed through screws or bolts so as to be convenient to disassemble and assemble; the inner cavity of the piston housing 2 and the inner cavity of the brake housing 1 are combined to form a receiving cavity 3, and the receiving cavity 3 forms the inner cavity of the brake 100. An oil inlet 21 and an oil outlet 22 are inwards arranged on the outer end face of the piston shell 2, the oil inlet 21 is communicated with the accommodating cavity 3 and is located above the horizontal plane, the oil outlet 22 is communicated with the accommodating cavity 3 and is lower than the oil inlet 21, an oil inlet channel 23 and an oil outlet channel 24 are respectively arranged on the piston shell 2 from the oil inlet 21 and the oil outlet 22 towards the accommodating cavity 3, the oil inlet channel 23 and the oil outlet channel 24 are communicated with the accommodating cavity 3, and the oil inlet 21 and the oil outlet 22 are respectively communicated with an oil tank (not shown) of the drive axle through an oil inlet pipe (not shown) and an oil outlet pipe (not shown), so that cooling oil can flow into the accommodating cavity 3 from the oil inlet 21 through the oil inlet channel 23 and then flow back to the oil tank from the oil outlet channel 24 through the oil outlet 22, and the cooling oil can be recycled. The oil inlet 21 positioned above the horizontal plane and the oil outlet 22 lower than the oil inlet 21 are arranged on the outer end face of the piston shell 2, so that the cooling oil forms pressure difference, the flow of the cooling oil is facilitated, heat generated during braking of the dynamic friction plate and the static friction plate can be sufficiently taken away, the cooling effect is improved, and the brake 100 is ensured to have good use performance.

As shown in fig. 1 and 4, specifically, the oil inlet 21 is located on a vertical plane perpendicular to a horizontal plane, the oil outlet 22 is close to the horizontal plane relative to the oil inlet 21, and the oil inlet 21 and the oil outlet 22 are designed in positions, so that the amount of cooling oil can meet the heat dissipation requirement, the additional heat generated when the cooling oil is sheared by the friction plates can be reduced, the situation that the damping between the friction plates and the cooling oil is increased due to the fact that the oil outlet 22 is raised due to the fact that the liquid level of the cooling oil is high due to high position can be prevented, and the cooling effect is further improved. In order to further improve the cooling effect, the oil inlet 21 and the oil outlet 22 are close to the outer peripheral wall of the piston housing 2 relative to the central axis of the brake cooling structure, and an included angle between the oil inlet 21 and the oil outlet 22 is 90 degrees. Two oil outlets 22 are provided, the two oil outlets 22 are respectively located on two opposite sides of the half-shaft sleeve 201 and have the same height, and by arranging the two oil outlets 22, not only is product interchangeability satisfied, but also two oil outlet pipes can be connected at the same time, so that the oil return amount is increased, the purpose of accelerating heat dissipation is achieved, the brake 100 can be fully cooled, and the service life is prolonged.

As shown in fig. 2 and 3, in order to save space and facilitate the component of the abdicating drive axle, the brake structure is more compact, the outer end of the piston housing 2 has a cover plate 20, the cover plate 20 covers the outer end surface of the brake piston 4, the outer plate surface of the cover plate 20 has an oil inlet 21 and an oil outlet 22, the oil outlet channel 24 includes a first oil channel 241 and a second oil channel 242 which are communicated with each other, the first oil channel 241 is inwardly opened from the oil outlet 22 along the central axis direction, the second oil channel 242 is inwardly opened from the inner end of the first oil channel 241 along the central axis direction and corresponds to the outer end surface of the brake piston 4, and the axis of the second oil channel 242 deviates toward the central axis relative to the axis of the first oil channel 241 so as to facilitate the oil pipe on the abdicating drive axle. In the present embodiment, the diameter of the second oil passage 242 is smaller than the diameter of the first oil passage 241 and is located on one side of the first oil passage 241 close to the central axis, so as to increase the output flow rate of the cooling oil, preferably, the length of the second oil passage 242 is D1, the outer end of the second oil passage 242 intersects with the inner end of the first oil passage 241 to form an intersection oil passage 243, the intersection oil passage 243 is located between two ends of the first oil passage 241 and has a length D2, D1/2D 1 is not less than D2< D1, in the present embodiment, D2=3/4D1, and the length of the intersection oil passage 243 is designed to reduce the thickness of the cover plate 20 when the cooling oil flows smoothly. The inner end of the second oil channel 242 further extends downward to form a return oil channel 26, the return oil channel 26 penetrates through the inner plate surface of the cover plate 20 inward to communicate with the accommodating cavity 3, and the arrangement of the return oil channel 26 realizes smooth flowing of the cooling oil and saves space.

As shown in fig. 1 and 3, in order to enhance the strength of the piston housing 2 and facilitate connection of the oil outlet pipe, the outer end surface of the piston housing 2 protrudes outward to form a supporting portion 25 corresponding to the oil outlet passage 24, specifically, the outer plate surface of the cover plate 20 protrudes outward to form a supporting portion 25 corresponding to the oil outlet passage 24, the supporting portion 25 extends in the radial direction of the brake cooling structure and toward the central axis, the outer end surface of the supporting portion 25 protrudes outward to form a boss 251, and the oil outlet passage 24 penetrates the boss 251 outward in the direction of the central axis to form the oil outlet 22 on the outer end surface of the boss 251.

The embodiment of the utility model provides a still provide a drive axle, its drive axle for engineering axletree, including axle housing 200, through the fix with screw in axle housing 200 tip on semi-axis sleeve pipe 201, locate semi-axis 300 in axle housing 200 and the semi-axis sleeve pipe 201, the stopper 100 and the above-mentioned arbitrary embodiment on semi-axis sleeve pipe 201 are located to the cover stopper cooling structure, stopper cooling structure locates on stopper 100.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The brake cooling structure is characterized by comprising a brake shell and a piston shell positioned outside the brake shell;

2. The brake cooling structure of claim 1, wherein the oil outlet is located near the horizontal plane relative to the oil inlet, and the oil inlet is located on a vertical plane perpendicular to the horizontal plane.

3. The brake cooling structure of claim 1, wherein the oil inlet and the oil outlet are located adjacent to the outer peripheral wall of the piston housing relative to the central axis, and an angle between the oil inlet and the oil outlet is 90 degrees.

4. The brake cooling structure of claim 1, wherein there are two of said oil outlets, said two oil outlets being located on opposite sides of said axle sleeve and being of equal height.

5. The brake cooling structure of claim 1, wherein the outer end surface of the piston housing protrudes outward to form a supporting portion corresponding to the oil outlet channel, the supporting portion extends in a radial direction of the brake cooling structure and toward the central axis, the outer end surface of the supporting portion protrudes outward to form a boss, and the oil outlet channel penetrates the boss outward in the direction of the central axis to form the oil outlet on the outer end surface of the boss.

6. The brake cooling structure according to claim 1, wherein a cover plate is provided at an outer end of the piston housing, the oil inlet and the oil outlet are provided at an outer plate surface of the cover plate, the oil outlet passage includes a first oil passage and a second oil passage which are connected to each other, the first oil passage is provided inward from the oil outlet in the direction of the central axis, the second oil passage is provided inward from an inner end of the first oil passage in the direction of the central axis, and an axis of the second oil passage is offset toward the central axis with respect to an axis of the first oil passage.

7. The brake cooling structure according to claim 6, wherein the second oil passage has a diameter smaller than that of the first oil passage and is located on a side of the first oil passage that is close to the central axis.

8. The brake cooling structure according to claim 6, wherein the second oil passage has a length of D1, an outer end of the second oil passage intersects an inner end of the first oil passage to form an intersecting oil passage, the intersecting oil passage is located between the two ends of the first oil passage and has a length of D2, and 1/2D1 is not less than D2< D1.

9. The brake cooling structure according to claim 6, wherein the piston housing is configured to cover a brake piston of the brake, the cover plate is covered outside an outer end surface of the brake piston, the second oil passage corresponds to the outer end surface of the brake piston, and an inner end of the second oil passage extends downward to form an oil return passage, and the oil return passage extends inward through an inner plate surface of the cover plate to communicate with the accommodating cavity.

10. Transaxle, its characterized in that includes the axle housing, is fixed in semi-axis sleeve pipe on the axle housing tip, locate the axle housing with semi-axis, cover in the semi-axis sleeve pipe are located stopper on the semi-axis sleeve pipe and the stopper cooling structure of any of claims 1 to 9, stopper cooling structure locates on the stopper.