gearbox

Abstract

The utility model relates to a gear box, including the box, one end of box is provided with the air inlet, the other end is provided with the air outlet, the air inlet is connected with the air supply mechanism, the inside of box is provided with a plurality of pivot, the outer wall of pivot one end is provided with the first blind hole of radial extension, the first blind hole is located in the box, the end face of the other end of pivot is provided with the second blind hole of axial extension, the second blind hole is linked together with the first blind hole, and the orifice of second blind hole is located outside the box, the gear box of the utility model runs, and the air supply mechanism is transported to the inside of gear box, and after the cold air enters the gear box, part passes through the air outlet and is discharged, can take away the heat of pivot and gear surface, part enters the second blind hole through the first blind hole, and then after the second blind hole, can take away the heat in the pivot.

Description

Technical Field

[0001] This utility model belongs to the field of transmission equipment, and in particular to a gearbox. Background Technology

[0002] Gearboxes are commonly used transmission devices in many devices. During operation, gears, bearings, and other components generate heat due to friction and load. If this heat cannot be dissipated in time, the internal temperature of the gearbox will rise, leading to a series of problems such as lubricant failure, deterioration of material properties of gears, shafts, and other parts, and thermal deformation. Therefore, effective heat dissipation measures must be taken to ensure the normal operation of the gearbox and extend its service life.

[0003] Currently, the most common heat dissipation method is air cooling, which involves installing a fan on the gearbox to promote air circulation inside and outside the gearbox. Examples include existing technologies such as CN202021915197.9 - A gearbox for easy heat dissipation, CN202121401814.8 - A twin-screw extruder gearbox, and CN202120912796.3 - A high-stability reduction gearbox. Existing air-cooled gearboxes typically place the air inlet and outlet on the gearbox housing, which is beneficial for dissipating heat from the shaft surface, but heat inside the shaft is difficult to dissipate. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a gearbox that can simultaneously dissipate heat from the surface and interior of the shaft, thereby improving the heat dissipation effect.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: a gearbox, including a housing, an air inlet at one end of the housing and an air outlet at the other end, the air inlet being connected to an air supply mechanism; and multiple rotating shafts are provided inside the housing.

[0006] The outer wall of one end of the rotating shaft is provided with a radially extending first blind hole, which is located inside the housing; the end face of the other end of the rotating shaft is provided with an axially extending second blind hole, which communicates with the first blind hole, and the opening of the second blind hole is located outside the housing.

[0007] Furthermore, there are multiple first blind holes.

[0008] Furthermore, a dust filter is installed inside the air inlet.

[0009] Furthermore, the inner cavity of the housing is divided into an air inlet cavity and a transmission cavity by a partition. The air inlet is connected to the air inlet cavity, and the air outlet is connected to the transmission cavity. The first blind hole is located in the air inlet cavity, and the partition is provided with an air passage connecting the air inlet cavity and the transmission cavity.

[0010] Furthermore, the airways are multiple.

[0011] Furthermore, the diameter of the airway is the same as the diameter of the first blind hole.

[0012] Furthermore, the air supply mechanism is an air pump.

[0013] The beneficial effects of this utility model are: when the gearbox of this utility model is running, cold air is supplied to the inside of the gearbox through the air supply mechanism. After the cold air enters the gearbox, part of it is discharged through the air outlet, which can take away the heat of the shaft and gear surface; part of it enters the second blind hole through the first blind hole, and then is discharged after passing through the second blind hole, which can take away the heat inside the shaft.

[0014] As can be seen, the present invention can dissipate heat from both the surface and the interior of the shaft at the same time, resulting in better heat dissipation and preventing heat from gradually accumulating inside the shaft and affecting its performance. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0016] Reference numerals in the attached drawings: 1—box body; 2—air inlet; 3—air outlet; 4—air supply mechanism; 5—rotating shaft; 6—first blind hole; 7—second blind hole; 8—dust filter; 9—partition; 10—air inlet chamber; 11—transmission chamber; 12—air passage. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] The gearbox of this utility model, such as Figure 1 As shown, the enclosure includes a housing 1, with an air inlet 2 at one end and an air outlet 3 at the other end. The air inlet 2 is connected to an air supply mechanism 4. Both the air inlet 2 and the air outlet 3 are located on the side wall of the housing 1, used to introduce cool air and simultaneously exhaust hot air from inside the housing 1. The air supply mechanism 4 can be connected to the air inlet 2 via a pipe to deliver cool external air into the housing 1, promoting air circulation between the inside and outside of the housing 1, thereby achieving heat dissipation inside the housing 1.

[0019] The housing 1 contains multiple rotating shafts 5, which are installed using existing methods. Each shaft 5 is equipped with a gear, which can be manufactured using existing technology. A radially extending first blind hole 6 is provided on the outer wall of one end of each shaft 5. The first blind hole 6 is located inside the housing 1, allowing its opening to communicate with the internal space of the housing 1. An axially extending second blind hole 7 is provided on the end face of the other end of each shaft 5. The second blind hole 7 can be coaxial with the shaft 5 and communicates with the first blind hole 6. The communication point is located inside the shaft 5, and the opening of the second blind hole 7 is located outside the housing 1. That is, the end face of the shaft 5 with the second blind hole 7 extends out of the housing 1, allowing its opening to connect with the external space.

[0020] The heat dissipation process of the gearbox of this utility model is as follows: the air supply mechanism 4 delivers cold air from the outside to the air inlet 2. The cold air enters the inside of the housing 1 through the air inlet 2, making the air pressure inside the housing 1 higher than the air pressure outside. That is, the air pressure inside the air outlet 3 is higher than the air pressure outside. At the same time, the air pressure at the opening of the first blind hole 6 is higher than the air pressure at the opening of the second blind hole 7. Under the action of the air pressure difference, some of the cold air passes through the inner cavity of the housing 1 and flows to the air outlet 3, and then is discharged from the air outlet 3, which can carry away the heat on the surface of the gear and the rotating shaft 5; the other part of the cold air enters the second blind hole 7 through the first blind hole 6, and then flows to the outside of the housing 1 along the second blind hole 7, which can carry away the heat inside the rotating shaft 5.

[0021] This invention can simultaneously dissipate heat from both the surface and interior of the rotating shaft 5, resulting in better heat dissipation and preventing the gradual accumulation of heat inside the rotating shaft 5 from affecting its performance.

[0022] In this invention, there are multiple first blind holes 6, specifically two, three, etc. They can be evenly distributed around the circumference of the rotating shaft 5 or evenly distributed along the axis of the rotating shaft 5, which can increase the amount of air entering the second blind hole 7.

[0023] Outside air contains dust, which can easily enter the gearbox through the air inlet 2, leading to accelerated gear wear and affecting lubrication. To prevent outside dust from entering the gearbox, this invention includes a dust filter 8 inside the air inlet 2. The dust filter 8 can be any existing filter capable of removing dust. Similarly, a filter can also be installed at the air outlet 3 to prevent outside air from entering the gearbox when it is not running.

[0024] To avoid the second blind hole 7 affecting the strength of the shaft 5, the diameter of the second blind hole 7 is usually less than 1 / 3 of the diameter of the shaft 5. The internal space of the second blind hole 7 is much smaller than the internal cavity of the housing 1. Therefore, most of the cold air flows through the internal cavity of the housing 1 to the air outlet 3, and only a small amount of cold air enters the second blind hole 7, resulting in poor heat dissipation inside the shaft 5. To encourage more cold air to enter the second blind hole 7, this invention divides the internal cavity of the housing 1 into an air inlet chamber 10 and a transmission chamber 11 by a partition 9. The gear is located inside the transmission chamber 11, and the end of the shaft 5 passes through the partition 9. The air inlet 2 is connected to the air inlet chamber 10, and the air outlet 3 is connected to the transmission chamber 11. The first blind hole 6 is located inside the air inlet chamber 10, and the partition 9 is provided with an air passage 12 connecting the air inlet chamber 10 and the transmission chamber 11. When cold air from the outside enters the housing 1, it first enters the intake chamber 10. Then, some of the air enters the transmission chamber 11 through the air passage 12 to dissipate heat from the surfaces of the gears and shaft 5. The remaining air enters the second blind hole 7 through the first blind hole 6 to dissipate heat from the inside of the shaft 5. When the air inlet 2 is directly connected to the transmission chamber 11, there is no resistance to the cold air entering the transmission chamber 11, so most of the air enters the transmission chamber 11. However, when the transmission chamber 11 is connected by the air passage 12, the cold air is blocked by the partition 9 and cannot directly enter the transmission chamber 11. The cross-sectional area of ​​the channel through which the cold air enters the transmission chamber 11 is reduced, thus slowing down the speed at which the cold air enters the transmission chamber 11 and encouraging more cold air to enter the first blind hole 6, thereby improving the heat dissipation effect inside the shaft 5.

[0025] The air passage can be a vent hole set on the partition 9, and there can be one air passage. Preferably, there are multiple air passages, such as three or four. Multiple air passages are evenly distributed, which can disperse cold air into the transmission cavity 11 and improve the uniformity of heat dissipation.

[0026] The diameter of the air passage 12 is the same as the diameter of the first blind hole 6, so that the flow rate of cold air entering each air passage 12 is equal to the flow rate of cold air entering each first blind hole 6.

[0027] The air supply mechanism 4 can be a fan or other equipment; preferably, the air supply mechanism 4 is an air pump.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gearbox, comprising a housing (1), wherein an air inlet (2) is provided at one end of the housing (1) and an air outlet (3) is provided at the other end, and an air supply mechanism (4) is connected to the air inlet (2); and multiple rotating shafts (5) are provided inside the housing (1); characterized in that: The outer wall of one end of the rotating shaft (5) is provided with a radially extending first blind hole (6), which is located inside the housing (1); the end face of the other end of the rotating shaft (5) is provided with an axially extending second blind hole (7), which is connected to the first blind hole (6), and the opening of the second blind hole (7) is located outside the housing (1).

2. The gearbox as described in claim 1, characterized in that: There are multiple first blind holes (6).

3. The gearbox as described in claim 1, characterized in that: A dust filter (8) is installed inside the air inlet (2).

4. The gearbox as described in claim 1, characterized in that: The inner cavity of the housing (1) is divided into an air inlet cavity (10) and a transmission cavity (11) by a partition (9). The air inlet (2) is connected to the air inlet cavity (10), and the air outlet (3) is connected to the transmission cavity (11). The first blind hole (6) is located in the air inlet cavity (10). An air passage (12) connecting the air inlet cavity (10) and the transmission cavity (11) is provided on the partition (9).

5. The gearbox as described in claim 4, characterized in that: The airway (12) is multiple.

6. The gearbox as described in claim 5, characterized in that: The diameter of the airway (12) is the same as the diameter of the first blind hole (6).

7. The gearbox as claimed in claim 1, characterized in that: The air supply mechanism (4) is an air pump.

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