Hub reduction gear planet carrier with heat dissipation function

Abstract

The utility model relates to the technical field of hub reduction gears, in particular to a hub reduction gear planet carrier with a heat dissipation function. The problems that due to the fact that an existing hub reduction gear conducts natural heat dissipation through the outer end face of a planet carrier, the heat dissipation effect is poor, the temperature of the reduction gear is high when a mine car runs for a long time, and parts of the reduction gear are abraded are solved. The planet carrier comprises a planet carrier body and planet wheels. A plurality of planet pins are fixedly arranged on the planet carrier body, and planet wheels are rotationally mounted on the planet pins through bearings; a protruding heat dissipation piece is arranged on the outer end face of the side, away from a planet wheel, of the planet carrier body and used for increasing the heat dissipation area of the outer end face of the planet carrier. According to the hub reduction gear, the heat dissipation area of the outer end face is increased through the protruding heat dissipation fins, so that the heat dissipation effect of the hub reduction gear is improved, it is guaranteed that the temperature of the reduction gear is kept stable when a mine car moves for a long time, and part abrasion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel-side reducers, in particular to a wheel-side reducer planetary carrier with a heat dissipation function. Background Art

[0002] The wheel-side reducer in the mining dump truck drive system is installed in the drive wheels at both ends of the vehicle's rear axle, performing the final stage of speed reduction and torque increase in the mining truck drive system. The wheel-side reducer transmits high power and torque, and is generally self-lubricating (oil stirring lubrication), generating a lot of heat. Currently, products on the market all use natural heat dissipation on the outer surface of the gearbox to cool. The wheel-side reducer is installed inside the mining truck's drive tire. Except for the outer end surface of the planetary carrier, the entire housing is exposed to the outside, and the rest of the components are wrapped by the wheel rim (such as Figure 1 ), ventilation is difficult, and the heat dissipation effect through the gear box surface is not ideal. Therefore, the operating equilibrium temperature of the wheel-side reducer is relatively high. When the mine car is running at full load or overload for a long time, the balance temperature of the wheel-side reducer will further increase, causing the viscosity of the internal lubricating oil to decrease, resulting in an increase in the risk of damage and failure such as bonding of gears and bearings. Therefore, a wheel-side reducer planetary frame with a heat dissipation function is needed to solve the problem that the existing wheel-side reducer naturally dissipates heat through the outer end face of the planetary frame, has a poor heat dissipation effect, and causes the reducer temperature to be high when the mine car is running for a long time, causing wear of the reducer components. Utility Model Content

[0003] The purpose of the utility model is to provide a wheel-side reducer planetary carrier with a heat dissipation function to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a planetary carrier of a wheel-side reducer with a heat dissipation function, comprising a planetary carrier body and planetary wheels; a plurality of planetary pins are fixedly provided on the planetary carrier body, and planetary wheels are rotatably mounted on the planetary pins through bearings; a raised heat dissipation member is provided on the outer end surface of the planetary carrier body away from the planetary wheels, which is used to increase the heat dissipation area of the outer end surface of the planetary carrier.

[0005] Preferably, the planetary carrier body includes an outer end plate, a connecting rib plate and a base plate. The outer end plate is integrally formed with the base plate through the connecting rib plate, and the outer end plate and the base plate are concentrically arranged with the center of the planetary carrier body; a number of planetary pin mounting cavities are evenly spaced along the center circumference direction on the planetary carrier body; the planetary pins are fixedly installed one by one in the mounting cavities, and the two ends of the planetary pins are respectively against the outer end plate and the base plate.

[0006] Preferably, a limit slot is provided on the pin body of the planetary pin adjacent to the base plate, and a limit block is provided at a position corresponding to the base plate and the limit slot. When the planetary pin is installed in the installation cavity, the limit block abuts against the limit slot to limit the rotational movement of the planetary pin.

[0007] Preferably, there are two bearings on the outer side of each planet pin, and the two bearings are fixedly installed on the outer side of the planet pin in parallel with each other.

[0008] Preferably, the heat sink is a heat dissipation fin, and there are a plurality of heat dissipation fins, which are evenly spaced along the central circumference of the outer end plate.

[0009] Preferably, the heat dissipation fins are vertically mounted on the outer end surface; the height of the heat dissipation fins is 2-3 times the thickness of the outer end plate.

[0010] Preferably, the distance between two adjacent heat dissipation fins is not greater than the height of the heat dissipation fins.

[0011] Preferably, one end of the heat dissipation fin extends toward the center of the outer end plate to form an inner extension end, and the other end extends toward the outer edge of the outer end plate to form an outer extension end. The inner extension ends of the heat dissipation fins enclose a central region whose shape and size match the size of the sun gear. A removable solar cover is provided on the outer end plate of the central region, and threaded holes are circumferentially formed on the outer plate body of the outer end plate at the outer extension end of the heat dissipation fin to form an outer flange connected to the torque tube. This arrangement enables the heat dissipation area of the heat dissipation fin to match the motion trajectory area of the planetary gear of the planetary carrier. The sun gear is meshed with the inner side of the planetary gear, and the inner extension end of the heat dissipation fin can cover the meshing area with the sun gear, thereby ensuring heat dissipation of the meshing area and saving the manufacturing amount of the heat dissipation fins. At the same time, a removable cover is provided at the position corresponding to the sun gear to facilitate the disassembly and assembly of the sun gear during daily maintenance, which is convenient to operate.

[0012] Beneficial effects: 1. The planetary frame of the wheel-side reducer with heat dissipation function provided by the utility model is provided with an outer end surface having a raised heat dissipation member, so as to increase the heat dissipation area of the outer end surface through the raised heat dissipation member, thereby improving the heat dissipation effect of the wheel-side reducer, ensuring that the temperature of the reducer remains stable when the mine car moves for a long time, and reducing component wear.

[0013] 2. The heat dissipation element of the wheel-end reducer planetary carrier provided by the present invention is a heat dissipation fin, which is mounted vertically on the outer end face of the planetary carrier. The heat dissipation fins greatly increase the contact area between the planetary gear end face and the air. At the same time, when the planetary carrier rotates with the wheel, the heat dissipation fin structure increases the speed of air flow at the planetary carrier end face, further enhancing the heat dissipation effect. In addition, the shape and size of the heat dissipation fins are scientifically designed, and can be adaptively set according to the thickness of the planetary carrier outer end plate. The spacing between two adjacent heat dissipation fins is also specified. This allows the installation of suitable heat dissipation fins according to actual production requirements, thereby expanding the product's applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1It is a structural diagram of a wheel-side reducer in the prior art;

[0015] Figure 2 Schematic diagram of the structure of the wheel reducer of this embodiment;

[0016] Figure 3 This is a schematic structural diagram of the planetary carrier of the wheel-side reducer with heat dissipation function in this embodiment;

[0017] Figure 4 for Figure 3 Cross-sectional view at AA in the middle. DETAILED DESCRIPTION

[0018] The technical solution of the present application is described in detail below with reference to the accompanying drawings, but the protection scope of the present application is not limited to the embodiments.

[0019] like Figure 2-Figure 4 As shown: This embodiment provides a wheel-side reducer planetary carrier with heat dissipation function, including a planetary carrier body and planetary wheels 5; three planetary pins 3 are fixed on the planetary carrier body, and planetary wheels 5 are rotatably mounted on the planetary pins 3 through bearings; a raised heat dissipation member is provided on the outer end surface of the planetary carrier body away from the planetary wheels, which is used to increase the heat dissipation area of the outer end surface of the planetary carrier.

[0020] The planetary carrier body of this embodiment includes an outer end plate 10, a connecting rib plate 11, and a base plate 12. The outer end plate is integrally formed with the base plate via the connecting rib plate, and the outer end plate and base plate are concentrically arranged with the center of the planetary carrier body. Several planetary pin mounting cavities are evenly spaced along the central circumference of the planetary carrier body. The planetary pins are fixedly mounted in the mounting cavities, one by one, with their ends abutting the outer end plate and base plate, respectively. A limit slot is provided on the pin body of the planetary pin on the side closest to the base plate, and a limit block is provided at a position on the base plate corresponding to the limit slot. When the planetary pin is installed in the mounting cavity, the limit block abuts against the limit slot, thereby limiting the planetary pin's rotational movement.

[0021] In this embodiment, the number of bearings on the outer side of each planetary pin is two, and the two bearings are fixedly installed on the outer side of the planetary pin in parallel with each other.

[0022] In addition, the heat dissipation element of this embodiment is a heat dissipation fin 6, and the number of the heat dissipation fins is several, and the several heat dissipation fins are evenly spaced along the central circumference of the outer end plate.

[0023] Furthermore, the heat dissipation fins are mounted vertically on the outer end surface; the height of the heat dissipation fins is 2-3 times the thickness of the outer end plate. The spacing between two adjacent heat dissipation fins in this embodiment is no greater than the height of the heat dissipation fins. One end of the heat dissipation fin in this embodiment extends toward the center of the outer end plate, forming an inner extension end, and the other end extends toward the outer edge of the outer end plate, forming an outer extension end. The inner extension ends of several heat dissipation fins enclose a central area whose shape and dimensions match those of the sun gear 4. A removable solar cover is provided on the outer end plate of the central area, and threaded holes are circumferentially opened on the outer plate body of the outer extension end of the heat dissipation fin on the outer end plate, forming an outer flange connected to the torque tube 1.

[0024] Working Principle: The planetary carrier of the wheel-side reducer with heat dissipation function in this embodiment is rotatably mounted within the gearbox of the wheel-side reducer. Bolt holes are arranged at intervals along the circumference of the outer circumference of the outer end surface of the planetary carrier. The carrier is connected to the reducer's thin-walled torque tube 1 via connecting bolts and is ultimately fixed to the wheel hub, driving the wheel. The planetary pins of the planetary carrier are fixed within the pin holes of the planetary carrier, and the planetary wheels are rotatably mounted to the planetary pins via two mounting bearings. The inner sides of the three planetary gears are meshed with a sun gear, one end of which is connected to the wheel axle as power input, while the planetary carrier meshes with the inner ring gear 2 of the reducer gearbox through the outer sides of the planetary gears. The reducer gearbox is filled with lubricating oil, and the oil level is between 1 / 6 and 1 / 3 of the diameter of the inner ring gear. When the reducer is in operation, power is input through the sun gear, which meshes with the three planetary gears. The driving planetary gears push the planetary pins, driving the planetary carrier to rotate, thereby driving the wheels. During operation, the planetary pins, planetary gears, and bearing components on the planetary carrier run into the lubricating oil pool. The planetary pins, planetary gears, bearing components, and the meshing parts of the planetary gears and the inner gear ring are immersed in the lubricating oil pool and can be fully lubricated. When the lubricating oil level is above, the above components are self-lubricated by stirring the oil. After the planetary carrier has been running for a certain period of time, the oil temperature of the lubricating oil begins to rise. Figure 3 The planet carrier's outer end face is designed with cooling fins 6. The height of these fins is approximately 2 to 3 times the carrier's web thickness, and the spacing between adjacent fins is no greater than this height, ensuring sufficient carrier end surface area. The fins extend from the carrier's center hole to the carrier's outer flange. During operation, the hot lubricating oil is in full contact with the carrier's inner end face, transferring heat to the carrier through heat conduction. Heat is then dissipated through the carrier's outer cooling fins, which are in full contact with the flowing air. This ensures that the lubricating oil in the reducer's gearbox maintains a suitable operating temperature, thereby ensuring the proper operation of the carrier components.

[0025] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A planetary carrier of a wheel-side reducer with heat dissipation function, comprising a planetary carrier body and planetary wheels; characterized in that: A plurality of planetary pins are fixedly provided on the planetary carrier body, and planetary gears are rotatably mounted on the planetary pins through bearings; a raised heat sink is provided on the outer end surface of the planetary carrier body away from the planetary gear, which is used to increase the heat dissipation area of the outer end surface of the planetary carrier.

2. The planetary carrier of a wheel-side reducer with heat dissipation function according to claim 1, characterized in that: The planetary carrier body includes an outer end plate, a connecting rib plate and a bottom plate. The outer end plate is integrally formed with the bottom plate through the connecting rib plate, and the outer end plate and the bottom plate are arranged concentrically with the center of the planetary carrier body; a number of planetary pin mounting cavities are evenly spaced along the center circumference on the planetary carrier body; the planetary pins are fixedly installed in the mounting cavities one by one, and the two ends of the planetary pins are respectively against the outer end plate and the bottom plate.

3. The planetary carrier of a wheel-side reducer with heat dissipation function according to claim 2, characterized in that: A limit slot is provided on the pin body of the planetary pin adjacent to the base plate, and a limit block is provided at a position of the base plate corresponding to the limit slot. When the planetary pin is installed in the installation cavity, the limit block abuts against the limit slot to limit the rotational movement of the planetary pin.

4. The planetary carrier of a wheel-side reducer with heat dissipation function according to claim 1, characterized in that: There are two bearings on the outer side of each planet pin, and the two bearings are fixedly installed on the outer side of the planet pin in parallel with each other.

5. The planetary carrier of a wheel-side reducer with heat dissipation function according to claim 2, characterized in that: The heat sink is a plurality of heat sink fins, and the plurality of heat sink fins are evenly spaced along the central circumference of the outer end plate.

6. The planetary carrier of a wheel-side reducer with heat dissipation function according to claim 5, characterized in that: The heat dissipation fins are vertically mounted on the outer end surface; the height of the heat dissipation fins is 2-3 times the thickness of the outer end plate.

7. The planetary carrier of a wheel-side reducer with heat dissipation function according to claim 5, characterized in that: The distance between two adjacent heat dissipation fins is not greater than the height of the heat dissipation fins.

8. The planetary carrier of a wheel-side reducer with heat dissipation function according to claim 5, characterized in that: One end of the heat dissipation fin extends toward the center of the outer end plate to form an inner extension end, and the other end extends toward the outer edge of the outer end plate to form an outer extension end; the inner extension ends of several heat dissipation fins enclose a central area whose shape and size are adapted to the size of the sun gear, and a removable solar cover is provided on the outer end plate of the central area, and threaded holes are opened along the circumference on the outer plate body of the outer extension end of the heat dissipation fin on the outer end plate to form an outer edge flange connected to the torque tube.

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