Planet carrier and hub reduction gear

Abstract

The hub reduction gear comprises a sun gear and a planet gear, an annular oil cavity is formed in the sun gear, a first oil conveying channel is arranged in gear teeth of the sun gear, a second oil conveying channel is arranged on the outer side of the annular oil cavity, the other end of the first oil conveying channel is connected with an oil spraying channel, and an oil plug is arranged in the oil spraying channel. An inner rod is arranged in the first oil conveying channel, a sliding rod is arranged on the inner rod in a penetrating mode, one end of the sliding rod is connected with an oil blocking plug, the other end of the sliding rod is connected with a limiting block, a reset spring is arranged between the oil blocking plug and the inner rod, and a protrusion is arranged on the surface of the side, away from the reset spring, of the oil blocking plug. A magnet sheet is arranged on the surface of the mounting plate; a bolt is inserted into the front side surface of the planet carrier; the device can automatically discharge oil for lubrication, reduce friction force and protect teeth, scrap iron generated by the gear can be adsorbed through the magnet piece and prevented from remaining in the gear, practicability is improved, and scrap iron cleaning operation is simple and convenient.

Description

Technical Field

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

[0002] The wheel reducer is one of the components of the automobile axle, which can reduce the speed transmitted by the main reduction and increase the torque at the gear end. In domestic wheel reducers, the sun gear is generally used as the power input and the planetary gear is used as the power output. The planetary carrier is an important part of the planetary gear reduction mechanism, which is mainly used for the installation and limit of the planetary gear.

[0003] The existing wheel-side reducer needs to continuously add lubricating oil to the transmission part of the planetary gear during use to prevent excessive wear of the planetary gear. The existing planetary gear lubricating oil is generally added manually, which is not only inconvenient to use, but also time-consuming and labor-intensive. In addition, the friction of the gears will produce a certain amount of iron filings, and the iron filings will remain in the tooth grooves, which will accelerate the wear of the gears and is not very practical. Therefore, we design a planetary carrier and a wheel-side reducer to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a planetary carrier and a wheel-side reducer to solve the problems raised in the above-mentioned background technology.

[0005] According to the utility model, a wheel-side reducer is proposed, including a sun gear and a plurality of planetary gears cooperating with the sun gear, the sun gear body is provided with an annular oil chamber inside, the sun gear teeth are provided with a first oil passage, the annular oil chamber is provided with a second oil passage corresponding to the first oil passage one by one on the outside, the second oil passage is communicated with the corresponding first oil passage, the other end of the first oil passage is connected with an oil injection passage, the other end of the oil injection passage is communicated with the inside of the tooth groove of the sun gear, an oil plug matching with the oil injection passage is provided in the oil injection passage and near its nozzle, an inner rod is fixedly provided inside one end of the first oil passage close to the oil injection passage, a sliding rod is provided on the inner rod for sliding through, one end of the sliding rod is connected to the oil plug and the other end is connected to a limiting block, a return spring is provided between the oil plug and the inner rod, the return spring is sleeved on the outside of the sliding rod, and a protrusion is provided on the surface of the oil plug away from the return spring.

[0006] Preferably, an oil filling hole is provided on the front surface of the sun gear, and a sealing plug matched with the oil filling hole is threadedly connected to the oil filling hole.

[0007] Preferably, the protrusion is a hemispherical structure.

[0008] Preferably, a rubber layer is provided on the outer surface of the oil plug.

[0009] Preferably, the oil injection passage is oriented perpendicular to the inner side wall of the tooth groove of the sun gear.

[0010] Preferably, the oil injection channel is in a funnel-shaped structure closing outwards.

[0011] A planetary carrier proposed in the utility model includes any one of the wheel-side reducers described above.

[0012] Preferably, a planetary carrier is installed on multiple planetary wheels, and a plurality of mounting grooves are opened on the rear surface of the planetary carrier. A mounting plate corresponding to the planetary carrier is slidably provided in the mounting groove, and a magnet sheet is provided on the surface of the mounting plate. A plurality of bolts are threadedly inserted on the front surface of the planetary carrier, and the bolts correspond to the mounting grooves one by one. The screw ends of the bolts extend into the corresponding mounting grooves and are rotatably connected to the mounting plate.

[0013] Preferably, the planet carrier is an annular structure, and the plurality of mounting grooves are distributed at equal intervals along the circumferential direction of the outer surface of the planet carrier.

[0014] Preferably, the size of the magnet sheet is equal to the size of the mounting slot.

[0015] Compared with the prior art, the beneficial effects of the utility model are: when the device is used, oil lubrication can be automatically supplied, friction can be reduced, and teeth can be protected, thus solving the problem of large friction and severe wear between teeth of gears; iron filings generated by gears can be adsorbed by the arrangement of multiple magnet sheets to prevent iron filings from remaining in the gears and thus accelerating wear, thus improving the practicality of the device, and the cleaning operation of iron filings is simple and convenient, thus improving work efficiency, and is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a partial structural diagram of the utility model;

[0018] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0020] Figure 5 It is a schematic diagram of the rear surface structure of the planet carrier in the utility model.

[0021] Among them: 1-sun gear, 2-bolt, 3-planetary gear, 4-planet carrier, 5-sealing plug, 6-annular oil chamber, 7-oil filling hole, 8-second oil delivery channel, 9-first oil delivery channel, 10-oil injection channel, 11-inner rod, 12-sliding rod, 13-limiting block, 14-reset spring, 15-oil plug, 16-protrusion, 17-rubber layer, 18-mounting groove, 19-magnet sheet. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example 1

[0024] See also Figure 1-4 The utility model proposes a wheel-side reducer, including a sun gear 1 and a plurality of planetary gears 3 matched with the sun gear 1. An annular oil chamber 6 is provided inside the wheel body of the sun gear 1. A first oil delivery passage 9 is provided inside the gear teeth of the sun gear 1. A second oil delivery passage 8 corresponding to the first oil delivery passage 9 is provided outside the annular oil chamber 6. The second oil delivery passage 8 is communicated with the corresponding first oil delivery passage 9. The other end of the first oil delivery passage 9 is connected to an oil injection passage 10. The other end of the oil injection passage 10 is communicated with the inside of the tooth groove of the sun gear 1. The direction of the oil injection passage 10 is perpendicular to the inner wall of the tooth groove of the sun gear 1. The oil injection passage 10 is straight, and the funnel-shaped structure is closed outward. An oil plug 15 matching with the oil injection passage 10 is provided in the oil injection passage 10 and near its nozzle. An inner rod 11 is fixedly provided inside one end of the first oil delivery passage 9 close to the oil injection passage 10. A sliding rod 12 is slidably penetrated on the inner rod 11. One end of the sliding rod 12 is connected to the oil plug 15, and the other end is connected to a limiting block 13. A return spring 14 is provided between the oil plug 15 and the inner rod 11. The return spring 14 is sleeved on the outside of the sliding rod 12, and a protrusion 16 is provided on the surface of the oil plug 15 on the side away from the return spring 14.

[0025] An oil filling hole 7 is provided on the front surface of the sun gear 1 , and a sealing plug 5 adapted thereto is connected to the inner thread of the oil filling hole 7 .

[0026] The protrusion 16 is a hemispherical structure, and a rubber layer 17 is provided on the outer surface of the oil plug 15. The rubber layer 17 increases the squeezing force so that when no oil is discharged, the oil plug 15 can play a good sealing role to prevent oil from leaking, thereby avoiding excessive oil discharge and wasting resources.

[0027] Specifically, during use, the sun gear 1 and the planetary gears 3 are meshed with each other for transmission, that is, the gear teeth of the planetary gear 3 will move and get stuck in the tooth grooves of the sun gear 1. In this process, the gear teeth of the planetary gear 3 will abut against the inner wall of the tooth grooves of the sun gear 1. Therefore, the gear teeth of the planetary gear 3 will abut against the protrusions 16 and squeeze the protrusions 16, so that the protrusions 16 can be squeezed back into the injection channel 10, that is, the oil plug 15 moves, and a gap is generated between the oil plug 15 and the inner wall of the injection channel 10, so the lubricating oil can smoothly enter the tooth grooves through the gap for lubrication. When the protrusion 16 is not squeezed, the elastic force of the reset spring 14 pushes the oil plug 15 and the protrusion 16 to reset, that is, the oil plug 15 closes the nozzle of the injection channel 10 again and prohibits oil discharge. The device sets the lubrication oil outlet position on the side wall of the tooth groove instead of the bottom wall, which can prevent iron filings generated during work from entering the channel where the lubricating oil flows to a certain extent. The iron filings need to be removed, as shown below.

[0028] Example 2

[0029] See also Figure 5 The utility model proposes a planetary carrier, including the wheel-side reducer recorded in Example 1, a plurality of planetary wheels 3 are equipped with a planetary carrier 4, a plurality of mounting grooves 18 are opened on the rear surface of the planetary carrier 4, a mounting plate adapted thereto is slidably provided in the mounting groove 18, a magnet sheet 19 is provided on the surface of the mounting plate, the size of the magnet sheet 19 is equal to the size of the mounting groove 18, a plurality of bolts 2 are threadedly inserted on the front surface of the planetary carrier 4, the bolts 2 correspond to the mounting grooves 18 one by one, the screw ends of the bolts 2 extend into the corresponding mounting grooves 18 and are rotatably connected to the mounting plate.

[0030] The planet carrier 4 is an annular structure, and a plurality of mounting grooves 18 are distributed at equal intervals along the circumferential direction of the outer surface of the planet carrier 4 .

[0031] By rotating the bolt 2, the mounting plate together with the magnet sheet 19 can be driven to move in the mounting groove 18, and when the mounting plate contacts the inner bottom wall of the mounting groove 18, the outer surface of the magnet sheet 19 is located on the inner side of the mounting groove 18. The advantage of this design is that the magnet sheet 19 can absorb iron filings generated during the working process, and when the absorbed iron filings are large and not cleaned up in time, the iron filings will move downward under the action of their own gravity, so the iron filings can accumulate on the inner wall of the mounting groove 18 near the notch. When cleaning, screw the bolt 2 to drive the mounting plate to move, and then drive the magnet sheet 19 to move toward the notch of the mounting groove 18 to push out the iron filings, which facilitates cleaning, simplifies operation, and improves efficiency.

[0032] In summary, when the device is used, it can automatically supply oil for lubrication, reduce friction, protect the teeth, and solve the problem of large friction and severe wear between the teeth of the gears; through the arrangement of multiple magnet sheets 19, the iron filings generated by the gears can be adsorbed to prevent the iron filings from remaining in the gears and accelerating wear, thereby improving the practicality of the device, and the cleaning operation of the iron filings is simple and convenient, thereby improving work efficiency, and is worthy of promotion.

[0033] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A wheel-side reducer, comprising a sun gear (1) and a plurality of planetary gears (3) matched with the sun gear (1); characterized in that: An annular oil chamber (6) is provided inside the wheel body of the sun gear (1), a first oil delivery passage (9) is provided inside the gear teeth of the sun gear (1), a second oil delivery passage (8) corresponding to the first oil delivery passage (9) is provided outside the annular oil chamber (6), the second oil delivery passage (8) is communicated with the corresponding first oil delivery passage (9), the other end of the first oil delivery passage (9) is connected to an oil injection passage (10), the other end of the oil injection passage (10) is communicated with the inside of the tooth groove of the sun gear (1), and a plug adapted to the oil injection passage (10) is provided in the oil injection passage (10) and near its nozzle. An oil plug (15) is provided with an inner rod (11) fixedly disposed inside one end of the first oil delivery passage (9) close to the oil injection passage (10), a sliding rod (12) slidingly passing through the inner rod (11), one end of the sliding rod (12) being connected to the oil plug (15) and the other end being connected to a limit block (13), a return spring (14) being disposed between the oil plug (15) and the inner rod (11), the return spring (14) being sleeved on the outside of the sliding rod (12), and a protrusion (16) being disposed on the surface of the oil plug (15) on the side away from the return spring (14).

2. A wheel reducer according to claim 1, characterized in that: The front surface of the sun gear (1) is provided with an oil filling hole (7), and the inner thread of the oil filling hole (7) is connected with a sealing plug (5) matched therewith.

3. A wheel reducer according to claim 2, characterized in that: The protrusion (16) is a hemispherical structure.

4. A wheel reducer according to claim 3, characterized in that: The outer surface of the oil plug (15) is provided with a rubber layer (17).

5. A wheel reducer according to claim 4, characterized in that: The direction of the oil injection channel (10) is perpendicular to the inner side wall of the tooth groove of the sun gear (1).

6. A wheel reducer according to claim 5, characterized in that: The oil injection channel (10) is in a funnel-shaped structure closing outwards.

7. A planet carrier, characterized in that: It comprises a wheel reducer as described in any one of claims 1 to 6.

8. A planet carrier according to claim 7, characterized in that: A planet carrier (4) is mounted on a plurality of planetary gears (3), a plurality of mounting grooves (18) are provided on the rear surface of the planet carrier (4), a mounting plate adapted thereto is slidably disposed in the mounting grooves (18), a magnet sheet (19) is provided on the surface of the mounting plate, a plurality of bolts (2) are threadedly inserted on the front surface of the planet carrier (4), the bolts (2) correspond to the mounting grooves (18) one by one, the screw ends of the bolts (2) extend into the corresponding mounting grooves (18) and are rotatably connected to the mounting plate.

9. A planet carrier according to claim 8, characterized in that: The planet carrier (4) is an annular structure, and a plurality of mounting grooves (18) are distributed at equal intervals along the circumferential direction of the outer surface of the planet carrier (4).

10. A planet carrier according to claim 9, characterized in that: The size of the magnet sheet (19) is equal to the size of the mounting groove (18).

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