External water cooling structure of top-mounted gearbox

Abstract

The invention discloses an externally-connected water cooling structure of a top-mounted gearbox. The externally-connected water cooling structure comprises a gearbox shell and a cooling pipeline. A groove extending in the long edge direction of the gearbox shell is formed in the outer surface of the bottom wall of the gearbox shell, the cooling pipeline is matched with the groove, and the cooling pipeline is detachably connected into the groove through a locking piece. The cooling pipeline is communicated with a water cooling system on the loading machine, circulating cooling liquid of the water cooling system flows through the cooling pipeline, the cooling liquid takes away heat of a gearbox shell, the continuous heat dissipation effect is achieved, loads of a raw water cooling heat dissipation system and an air cooling heat dissipation system of the loading machine are reduced, and the heat dissipation performance of the loading gearbox is improved; and the probability that the upper gearbox is overheated is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of gearbox cooling, and in particular relates to an external water cooling structure of a top-mounted gearbox. Background Art

[0002] The cooling method of vehicle gearbox is mainly air cooling, which means that air naturally flows through the gearbox casing during vehicle driving, thereby removing part of the gearbox heat. However, the upper gearbox of the loader is special. The loader is in the same construction site for a long time, the air flow is poor, the wind speed is low, and the heat of the gearbox removed by air is small, so the cooling effect of air cooling is minimal.

[0003] In order to solve the above problems, the existing upper gearbox of the loader has added water cooling and added cooling channels inside the side wall of the gearbox, relying on coolant to remove most of the heat of the gearbox. However, when running for a long time in a high-temperature construction environment, the cooling power of the air cooling and water cooling of the gearbox cannot meet the heat dissipation requirements, and the gearbox still has the problem of overheating. Therefore, there is still room for improvement in the existing upper gearbox. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an external water-cooling structure for a top-mounted gearbox, comprising a gearbox housing and a cooling pipe; the outer surface of the bottom wall of the gearbox housing is provided with a groove extending along the long side direction of the gearbox housing, the cooling pipe is adapted to the groove, and the cooling pipe can be detachably connected to the groove through a locking piece.

[0005] The beneficial effects of the external water cooling structure of the upper gearbox in the present invention are:

[0006] 1. The cooling pipe is connected to the water cooling system on the loader. The circulating coolant of the water cooling system flows through the cooling pipe. The coolant takes away the heat of the gearbox casing, which has a continuous heat dissipation effect, reduces the load of the original water cooling system and air cooling system of the loader, improves the heat dissipation performance of the upper gearbox, and reduces the probability of overheating of the upper gearbox.

[0007] 2. The cooling pipe can be separated from the gearbox housing. If the original water cooling system and air cooling system of the loader can meet the heat dissipation requirements of the upper gearbox, the cooling pipe can no longer be installed or split. The detachable external water cooling structure is more flexible and adaptable.

[0008] 3. Compared with the cooling channel inside the side wall of the upper gearbox, the external cooling duct has a simple structure and lower cost.

[0009] 4. Regardless of whether the loader is in operation or stationary state, due to the effect of gravity, most of the lubricating oil inside the upper gearbox is gathered at the bottom of the upper gearbox, that is, most of the lubricating oil is on the bottom wall of the gearbox shell. The cooling pipe is fixed on the outer surface of the bottom wall, which minimizes the heat transfer distance, that is, improves the heat dissipation efficiency.

[0010] 5. The groove increases the contact area with the cooling pipe, further improving the heat dissipation efficiency.

[0011] The preferred solution of the present invention is that the locking member is a pressure plate, and through holes are respectively provided near the two ends of the pressure plate, and bolts or screws are passed through the through holes to connect with the gearbox, so that the pressure plate presses the cooling pipe into the groove. Furthermore, protrusions are respectively provided on both sides of the groove, and the cooling pipe is clamped in the groove by the two protrusions. The cross-sectional shape of the groove and the protrusions on both sides is U-shaped, and the cooling pipe is just stuck in this U-shaped structure, which can make the cooling pipe fit more closely with the groove.

[0012] The preferred solution of the present invention is that the two protrusions are opposite to the two through holes of the pressure plate one by one, and each protrusion is provided with a threaded hole opposite to the corresponding through hole. In fact, each protrusion is equivalent to a stud with a threaded hole, and the protrusion part and the groove part can be added to the original mold of the gearbox housing, which is easy to open the mold and low in cost. In addition, since the loader vibrates greatly during the construction process, in order to further stabilize the cooling pipe, the pressure plate is provided with two and the two pressure plates are respectively close to the two ends of the groove, and each pressure plate corresponds to two protrusions with threaded holes. Two sets of protrusions are used to lock the two ends of the cooling pipe, so that the cooling pipe does not shake and is firmly connected to the gearbox housing.

[0013] The preferred solution of the present invention is that: since the cooling pipe is located at the bottom of the upper gearbox, the two ends of the cooling pipe are bent toward the same side of the gearbox housing, and the cooling pipe shall not be lower than the mounting hole at the bottom of the upper gearbox, so that the cooling pipe does not affect the normal installation of the upper gearbox, and the bent ends of the cooling pipe are respectively sleeved with sealing rings. In addition, the material of the cooling pipe part in contact with the groove is selected from copper, aluminum or stainless steel with good thermal conductivity and strong rust resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1The schematic diagram of the external water cooling structure of the upper gearbox in the present invention is shown in FIG. Figure 1 ;

[0016] Figure 2 The schematic diagram of the external water cooling structure of the upper gearbox in the present invention is shown in FIG. Figure 2 ;

[0017] Figure 3 It is a disassembled diagram of the external water cooling structure of the upper gearbox in the present invention.

[0018] Reference numerals: gearbox housing 1 , cooling duct 2 , groove 3 , arched portion 4 , sealing ring 5 , protrusion 6 , threaded hole 7 , through hole 8 , pressure plate 9 , bolt 10 . DETAILED DESCRIPTION

[0019] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0020] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, the present invention covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with general skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] like Figure 1 As shown, the first embodiment provides an external water cooling structure for a top-mounted gearbox, including a gearbox housing 1 and a cooling pipe 2. Different from the existing built-in water cooling pipe, the cooling pipe 2 in this embodiment is arranged outside the gearbox housing 1, and the specific connection method is as follows:

[0023] like Figure 3As shown, a groove 3 extending along the long side direction of the gearbox housing 1 is provided on the outer surface of the bottom wall of the gearbox housing 1. The outer diameter of the cooling pipe 2 is the same as the diameter of the groove 3. After the cooling pipe 2 is placed in the groove 3, the two can be completely fitted. Since the cooling pipe 2 is located at the bottom of the upper gearbox, the two ends of the cooling pipe 2 are bent toward the same side of the gearbox housing 1 respectively, which does not affect the installation process. The bent ends of the cooling pipe 2 are respectively provided with sealing rings 5, which are connected to the water cooling system on the loader through the sealing rings 5, specifically, the water channel directly connected to the cooling motor pump, which is convenient for layout and saves space. The purpose of fixing the cooling pipe 2 on the outer surface of the bottom wall is also to minimize the heat transfer distance, thereby improving the heat dissipation efficiency of the upper gearbox. The groove 3 part can also be slightly arched toward the inside of the gearbox housing 1, that is, forming an arched part 4, thereby expanding the heat dissipation contact area with the lubricating oil. In order to further improve the heat dissipation efficiency, the present embodiment screens the materials, for example, the material of the part of the cooling pipe 2 that contacts the groove 3 is selected from copper, aluminum or stainless steel with good thermal conductivity and strong rust resistance. But it is not limited to these three materials, it can also be materials such as gold and silver with better thermal conductivity.

[0024] Since the vibration amplitude of the loader during construction is larger than that of an ordinary vehicle, the cooling pipe 2 in this embodiment is detachably connected to the groove 3 through a locking member. Specifically, two protrusions 6 are provided on each side of the groove 3, and the protrusions 6 on both sides are opposite to each other. The two pairs of two protrusions 6 on both sides of the groove 3 form a group. The cooling pipe 2 is clamped in the groove 3 by the two groups of protrusions 6. The cross-section of the groove 3 and the protrusions 6 on both sides is U-shaped, and the cooling pipe 2 is just stuck in this U-shaped structure, so that the cooling pipe 2 can fit more closely with the groove 3.

[0025] like Figure 2 As shown, the locking member in this embodiment is a metal pressing plate 9, and two pressing plates 9 are provided. The two pressing plates 9 are respectively connected to the lower ends of the two groups of protrusions 6. Each pressing plate 9 is provided with through holes 8 at both ends, and each protrusion 6 is provided with a threaded hole 7 corresponding to the through hole 8. Bolts 10 or screws are passed through the through holes 8 and tightened in the corresponding threaded holes 7, so that the pressing plate 9 locks the cooling pipe 2 in the U-shaped structure. However, in order to overcome the shaking of the cooling pipe 2 caused by the vibration of the loader and affect the heat conduction efficiency, the pressing plate 9 in this embodiment adopts an interference installation method. After the four bolts 10 are tightened, the pressing plate 9 will slightly deform the surface of the water cooling pipe, thereby fixing the water cooling pipe so that it cannot move or rotate.

[0026] The external water-cooling structure of the upper gearbox provided in this embodiment utilizes the circulating coolant of the water cooling system to flow through the cooling pipe. The coolant takes away the heat of the gearbox housing 1, has a continuous heat dissipation effect, reduces the load of the original water-cooling heat dissipation system and the air-cooling heat dissipation system of the loader, and is arranged in a compact space to maximize the use of pipeline water cooling to reduce the operating temperature of the upper gearbox. After further improving the heat dissipation performance of the upper gearbox, the possibility of overheating is low, thereby increasing the life of the upper gearbox.

[0027] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A top-mounted gearbox external water cooling structure, comprising a gearbox housing (1) and a cooling pipe (2); characterized in that: The outer surface of the bottom wall of the gearbox housing (1) is provided with a groove (3) extending along the long side direction of the gearbox housing (1); the cooling pipe (2) is adapted to the groove (3), and the cooling pipe (2) is detachably connected to the groove (3) via a locking piece.

2. The upper-mounted gearbox external water cooling structure according to claim 1 is characterized in that: The locking member is a pressure plate (9), and through holes (8) are respectively provided near the two ends of the pressure plate (9). Bolts (10) or screws pass through the through holes (8) and are connected to the gearbox, so that the pressure plate (9) presses the cooling pipe (2) into the groove (3).

3. The external water cooling structure of the upper gearbox according to claim 2 is characterized in that: Protrusions (6) are respectively provided on both sides of the groove (3), and the cooling pipe (2) is clamped in the groove (3) by the two protrusions (6).

4. The external water cooling structure of the upper gearbox according to claim 3 is characterized in that: The two protrusions (6) are opposite to the two through holes (8) of the pressing plate (9) one by one, and each protrusion (6) is provided with a threaded hole (7) opposite to the corresponding through hole (8).

5. The upper-mounted gearbox external water cooling structure according to claim 4 is characterized in that: The pressing plates (9) are provided with two, and the two pressing plates (9) are respectively close to the two ends of the groove (3), and each pressing plate (9) corresponds to two protrusions (6) with threaded holes (7).

6. The external water cooling structure of a top-mounted gearbox according to claim 1, characterized in that: Both ends of the cooling pipe (2) are respectively bent toward the same side of the gearbox housing (1).

7. The upper mounted gearbox external water cooling structure according to claim 1, characterized in that: Sealing rings (5) are respectively sleeved on both ends of the cooling pipe (2).

8. The upper mounted gearbox external water cooling structure according to claim 1, characterized in that: The material of the portion of the cooling pipe (2) that contacts the groove (3) is copper, aluminum or stainless steel.

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