Loader-digger gearbox clutch structure with forced lubrication

Abstract

The utility model discloses a loader-digger gearbox clutch structure with forced lubrication. The loader-digger gearbox clutch structure comprises a sealing ring, an output shaft, a first bearing, a shaft end baffle, a hub body gear, a clutch shell, a large check ring, a large baffle, a driven piece, a driving piece, a piston assembly, an outer O-shaped ring, an inner O-shaped ring, a second bearing, a clutch shell seat, a belleville spring, a small baffle and a small check ring. The output shaft is provided with a forced lubricating oil channel, an oil inlet channel and a gear oil channel, and the forced lubricating oil channel and the gear oil channel are both communicated with the oil inlet channel; inner holes in the two ends of the hub body gear are in high-precision clearance fit with the output shaft, a groove is formed in the middle of the hub body gear, and an oil cavity is formed between the hub body gear and the output shaft. The gear oil way and the lubricating oil way are integrated, high-precision clearance fit between the hub body gear and the shaft is adopted to replace original bearing fit, the structure is simple and compact, the manufacturing cost is low, the lubricating effect is good, and the problem that in the prior art, a bearing is prone to being burnt and damaged is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator gearbox structure technical field, concretely relates to excavator gearbox clutch structure with forced lubrication. BACKGROUND

[0002] The excavator is favored by the customers in the fields of agriculture, forestry, municipal administration and small area operation because of its flexibility, shovel and loading characteristics. The gearbox is the core assembly of the transmission system of the excavator, and the clutch is one of the core components of the gearbox. The quality of the clutch has a crucial influence on the service life of the gearbox. The existing clutch generally adopts the structure of two oil paths of lubricating oil path and gear oil path. The excavator gearbox clutch structure has the following disadvantages: first, the structure is complex and the cost is high; second, the bearing between the hub gear and the shaft cannot be fully lubricated by the existing lubricating structure, and the bearing is prone to burning damage. SUMMARY

[0003] To solve the above problems, the gear oil path and the lubricating oil path are integrated by optimizing the clutch structure, the bearing between the hub gear and the shaft is cancelled, the high-precision gap cooperation between the hub gear and the shaft is adopted, and the high-pressure oil path of the gear is used to forcibly lubricate the cooperation between the hub gear and the shaft, so as to ensure sufficient lubrication and achieve the effect of saving the manufacturing cost and improving the product quality.

[0004] The utility model discloses a kind of excavator gearbox clutch structures with forced lubrication, which are simple and compact in structure, low in manufacturing cost, good in lubrication effect, solve the problem that the bearing between the hub gear and the shaft cannot be fully lubricated in the prior art, and the bearing is prone to burning damage.

[0005] To achieve the above object, the utility model discloses a take forced lubrication's excavator transmission clutch structure including sealing ring 1, output shaft 2, bearing one 3, shaft end baffle 4, hub gear 5, clutch housing 6, big baffle ring 7, big baffle 8, driven piece 9, driving piece 10, piston assembly 11, outer O -ring 12, inner O -ring 13, bearing two 14, clutch housing seat 15, disc spring 16, small baffle 17, small baffle ring 18, be equipped with forced lubricating oil channel 2.1, oil inlet 2.2, gear oil way 2.3 on output shaft 2, this forced lubricating oil channel 2.1 and gear oil way 2.3 all with oil inlet 2.2 are communicated, be equipped with oil drain hole on piston assembly 11, and the steel ball 11.2 is assembled in oil drain hole and constitutes one -way valve structure, and there is baffle 11.1 in outer end riveting, output shaft 2 and clutch housing seat 15 between adopt the mouth of a river location, and adopt welding connection fixed, clutch housing 6 and clutch housing seat 15 between adopt the mouth of a river location, and adopt welding connection fixed, make the whole welding complete after in three between the formation internal cavity, the cavity is successively assembled piston assembly 11, and successively alternate assembly's multiple driven piece 9 and multiple driving piece 10, big baffle 8, big baffle ring 7, successively positive and negative alternate assembly's multiple disc spring 16, small baffle 17, small baffle ring 18 and hub gear 5, the outer end of driven piece 9 and big baffle 8 is equipped with outer tooth and the inner tooth contact cooperation of clutch housing 6, and the inner circle of driving piece 10 is equipped with inner tooth and the outer tooth contact cooperation of hub gear 5, the high -precision clearance fit between the hole of both ends of hub gear 5 and output shaft 2, the recess is equipped with in the middle of this hub gear 5, forms the oil cavity between it and output shaft 2, and hub gear 5 outer end assembly has the shaft end baffle 4 of adjustment axial clearance, bearing one 3 and bearing two 14 are assembled in the bearing position on both ends of output shaft 2 and are close to the shoulder, sealing ring 1 is assembled in the sealing ring groove in the oil inlet end of output shaft 2, the outer O -ring 12 is assembled between the outer O -ring groove of piston assembly 11 and clutch housing seat 15 to ensure sealing, the inner O -ring 13 is assembled between the inner O -ring groove of piston assembly 11 and output shaft 2 to ensure sealing, when clutch does not work, piston assembly 11 is pressed in the bottom of clutch housing seat 15 through disc spring 16.

[0006] The above -mentioned take forced lubrication's excavator transmission clutch structure has the following technical features and beneficial effects by optimizing the design of clutch structure:

[0007] 1, cancel the bearing between hub gear and shaft, instead adopt the high -precision clearance fit between hub gear and shaft, simplify structure, reduce manufacturing cost,

[0008] 2, the gear oil way and lubricating oil way are integrated, the cooperation place of hub gear and shaft is forced lubricated using gear high -pressure oil, not only simplifies the oil way structure, but also ensures sufficient lubrication, reaches the effect of reducing cost while improving product quality. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main cross-sectional structure of the excavator loader gearbox clutch structure with forced lubrication.

[0010] Reference numerals in the attached diagram: 1. Sealing ring; 2. Output shaft; 2.1. Forced lubrication oil passage; 2.2. Oil inlet passage; 2.3. Gear oil passage; 3. Bearing 1; 4. Shaft end baffle; 5. Hub gear; 6. Clutch housing; 7. Large retaining ring; 8. Large baffle; 9. Driven plate; 10. Driving plate; 11. Piston assembly; 11.1. Baffle; 11.2. Steel ball; 12. Outer O-ring; 13. Inner O-ring; 14. Bearing 2; 15. Clutch housing seat; 16. Disc spring; 17. Small baffle; 18. Small retaining ring; Detailed Implementation

[0011] The excavator loader gearbox clutch structure with forced lubrication of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1As shown, the utility model discloses a forced lubrication's excavator gearbox clutch structure includes sealing ring 1, output shaft 2, bearing one 3, shaft end baffle 4, hub gear 5, clutch housing 6, big baffle ring 7, big baffle 8, driven sheet 9, driving piece 10, piston assembly 11, outer O -ring 12, inner O -ring 13, bearing two 14, clutch housing seat 15, disc spring 16, small baffle 17, small baffle ring 18, be equipped with forced lubricating oil channel 2.1, oil inlet 2.2, gear oil channel 2.3 on output shaft 2, this forced lubricating oil channel 2.1 and gear oil channel 2.3 all with oil inlet 2.2 are communicated, be equipped with a oil drain hole on piston assembly 11, and the steel ball 11.2 is assembled in this oil drain hole, is one-way valve structure, and is pressed riveting baffle 11.1 at the outer end, output shaft 2 and clutch housing seat 15 between adopt the mouth of a river location, and adopt welding connection fixed, clutch housing 6 and clutch housing seat 15 between adopt the mouth of a river location, and adopt welding connection fixed, make the whole welding complete after in three between the formation internal cavity, the cavity is successively assembled piston assembly 11, successively alternate assembly's multiple driven sheet 9 and multiple driving piece 10, big baffle 8, big baffle ring 7, successively positive and negative alternate assembly's multiple disc spring 16, small baffle 17, small baffle ring 18 and hub gear 5, the outer end of driven sheet 9 and big baffle 8 is equipped with outer tooth and the inner tooth contact cooperation of clutch housing 6, and driving piece 10 inner ring is equipped with inner tooth and the outer tooth contact cooperation of hub gear 5, the high-precision gap cooperation between the both ends inner hole of hub gear 5 and output shaft 2, the recess is equipped in the middle of this hub gear 5, forms the oil cavity between it and output shaft 2, and hub gear 5 outer end is assembled with the shaft end baffle 4 of adjustment axial gap, bearing one 3 and bearing two 14 are assembled on the bearing position of both ends of output shaft 2 and are close to the shoulder, sealing ring 1 is assembled in the sealing ring groove of the oil inlet end of output shaft 2, the outer O -ring 12 is assembled between the outer O -ring groove of piston assembly 11 and clutch housing seat 15 to ensure sealing, the inner O -ring 13 is assembled between the inner O -ring groove of piston assembly 11 and output shaft 2 to ensure sealing, when clutch does not work, piston assembly 11 is pressed in the bottom of clutch housing seat 15 by disc spring 16.

[0013] When clutch works oil, the high pressure oil of gear from oil inlet 2.2, gear oil channel 2.3 enters the piston cavity of clutch housing seat 15, and piston assembly 11 is pressed tightly friction plate assembly, and the power of hub gear 5 is transmitted to output shaft 2, at this time, the steel ball 11.2 of piston assembly 11 blocks the oil drain hole, and the high pressure oil of gear cannot be discharged from the oil drain hole of piston assembly, but can reach the oil cavity formed by hub gear 5 and output shaft 2 from forced lubricating oil channel 2.1, to realize the forced lubrication of the matching place of the two.

[0014] The utility model discloses a digging loader gearbox clutch structure with forced lubrication passes through to clutch structure optimization design, will gear oil channel 2.3 and lubricating oil channel 2.1 and oil inlet 2.2 integration is a through oil circuit, cancels the bearing between hub gear 5 and output shaft 2 simultaneously, instead adopts the high-precision clearance fit mode between hub gear 5 and output shaft 2, and uses the high-pressure oil circuit of gear to carry out forced lubrication to the fit place of hub gear 5 and output shaft 2, ensures sufficient lubrication, reaches the effect of reducing manufacturing cost and improving product quality simultaneously.

Claims

1. A clutch structure for a loader gearbox with forced lubrication, comprising a sealing ring (1), an output shaft (2), a bearing (3), a shaft end baffle (4), a hub gear (5), a clutch housing (6), a large retaining ring (7), a large baffle (8), a driven plate (9), a driving plate (10), a piston assembly (11), an outer O-ring (12), an inner O-ring (13), a bearing (2) (14), a clutch housing seat (15), a disc spring (16), a small baffle (17), and a small retaining ring (18); wherein the piston assembly (11) 1) An oil drain hole is provided on the upper part, and a steel ball (11.2) is installed in the oil drain hole to form a one-way valve structure. A baffle (11.1) is riveted on the outer end; the output shaft (2) and the clutch housing seat (15) are positioned by a stop and fixed by welding. The clutch housing (6) and the clutch housing seat (15) are positioned by a stop and fixed by welding, so that an internal cavity is formed between the three after the overall welding is completed; the cavity is sequentially equipped with a piston assembly (11), a number of driven plates (9) and a number of other components are sequentially and alternately assembled. The clutch consists of a drive plate (10), a large baffle (8), a large retaining ring (7), multiple disc springs (16) arranged alternately in opposite directions, a small baffle (17), a small retaining ring (18), and a hub gear (5); the outer ends of the driven plate (9) and the large baffle (8) are provided with external teeth that contact and engage with the internal teeth of the clutch housing (6), the inner ring of the drive plate (10) is provided with internal teeth that contact and engage with the external teeth of the hub gear (5), and the outer end of the hub gear (5) is equipped with a shaft end baffle (4) for adjusting axial clearance; the bearing one (3) and bearing two (14) are assembled On the bearing positions at both ends of the output shaft (2) and close to the shaft shoulder; the sealing ring (1) is assembled in the sealing ring groove at the oil inlet end of the output shaft (2); an outer O-ring (12) is assembled between the outer O-ring groove of the piston assembly (11) and the clutch housing seat (15) to ensure sealing, and an inner O-ring (13) is assembled between the inner O-ring groove of the piston assembly (11) and the output shaft (2) to ensure sealing. When the clutch is not working, the piston assembly (11) is pressed against the bottom of the clutch housing seat (15) by a disc spring (16); its characteristic is: The output shaft (2) is provided with a forced lubricating oil channel (2.1), an oil inlet channel (2.2) and a gear position oil channel (2.3), the forced lubricating oil channel (2.1) and the gear position oil channel (2.3) are communicated with the oil inlet channel (2.2); the inner holes at both ends of the hub gear (5) are high-precision gap-fitted with the output shaft (2), and the hub gear (5) is provided with a groove in the middle, so that an oil cavity is formed between the hub gear (5) and the output shaft (2).

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