Output clutch pack assembly and gearbox assembly

Abstract

The utility model relates to an output clutch pack assembly and a gearbox assembly. The output clutch pack assembly comprises a front output clutch pack assembly and a rear output clutch pack assembly, the front output clutch pack assembly comprises a front output shaft, a front output gear rotationally arranged on the front output shaft, a front output hub arranged on the front output shaft, a friction plate set A connected with the front output gear and the front output hub, and a front output piston arranged on the front output shaft in a sliding and sleeving mode. The rear output clutch pack assembly comprises a rear output shaft, a rear output gear arranged on the rear output shaft, a rear output hub body arranged on the rear output shaft, a friction plate group B connected with the rear output gear and the rear output hub body, and a rear output piston nested in the inner ring of the rear output hub body in a sliding manner; the front output gear and the rear output gear are connected in a meshed mode. The gearbox is compact and small in structure, has a four-wheel-drive / two-wheel-drive mode, improves the overall performance and the working efficiency, and is good in energy-saving effect and high in economical efficiency.

Description

Technical Field

[0001] The utility model relates to an output clutch package assembly and a gearbox assembly, belonging to the technical field of gearboxes for wheeled excavators. Background Art

[0002] Backhoe loaders are commonly known as two-wheelers. They are compact and flexible to use. They are small multifunctional engineering machinery and are widely used in earthwork, municipal engineering, gardening and other projects. However, the compactness of the overall structure of the backhoe loader limits the layout and performance improvement of its gearbox structure. At present, the gearbox of the backhoe loader on the market is manual full four-wheel drive, with low transmission efficiency, high fuel consumption at high speed, and poor economy; or automatic part-time four-wheel drive, but due to space constraints, the output torque of the gearbox is limited, and the performance improvement of the whole machine cannot be achieved.

[0003] Therefore, there is an urgent need for an output clutch pack assembly and a gearbox assembly that has a compact structure, four-wheel drive / two-wheel drive, improves the overall performance and working efficiency of the gearbox, and has good energy-saving effects and high economy. Summary of the invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a compact and small structure with four-wheel drive / two-wheel drive form in the limited space of the excavator, thereby improving the overall performance and working efficiency of the gearbox, and at the same time having good energy-saving effects and highly economical output clutch pack assembly and gearbox assembly.

[0005] The purpose of the utility model is achieved in this way:

[0006] An output clutch pack assembly comprises a front output clutch pack assembly and a rear output clutch pack assembly;

[0007] The front output clutch assembly is a normally closed piston external structure, comprising a front output shaft, a front output gear rotatably arranged on the front output shaft, a front output hub body arranged on the front output shaft through a spline, a friction plate group A connecting the front output gear and the front output hub body, and a front output piston slidably sleeved on the front output shaft; a plurality of guide pins are evenly and slidably arranged on the front output hub body, and the guide pins are pushed by the piston to control the contact or separation of the friction plate group A; an oil chamber A is formed on the left side of the piston by the front output hub body, the front output shaft and the piston, and an elastic component for pushing the piston to move left is arranged on the front output shaft on the right side of the piston;

[0008] The rear output clutch assembly is a normally open piston built-in structure, comprising a rear output shaft, a rear output gear arranged on the rear output shaft through a spline, a rear output hub body rotatably arranged on the rear output shaft, a friction plate group B connecting the rear output gear and the rear output hub body, and a rear output piston slidably nested in the inner ring of the rear output hub body; the rear output piston is in corresponding contact with the friction plate group B to control the contact or separation of the friction plate group B; an oil chamber B leading to the right end face of the rear output piston is arranged on the rear output hub body, and a spring is arranged between the rear output hub body and the left end face of the rear output piston;

[0009] The front output gear of the front output clutch pack assembly is meshedly connected with the rear output gear of the rear output clutch pack assembly.

[0010] Furthermore, the front output hub body is provided with a plurality of hub body dividing surfaces; the guide pin is slidably embedded in the through hole on the hub body dividing surface.

[0011] Furthermore, the oil chamber A forms a closed space through a sealing ring A arranged between the guide pin and the front output hub body, a sealing ring B arranged between the front output piston and the front output hub body, and a sealing ring C arranged between the front output piston and the front output shaft, and is connected to an oil channel A arranged inside the front output shaft.

[0012] Furthermore, the elastic component includes a disc spring sleeve slidably mounted on the front output shaft and a disc spring group slidably mounted on the disc spring sleeve; a washer and a retaining ring are arranged on the front output shaft, and the disc spring sleeve and the disc spring group perform a translational motion between the washer and the front output piston.

[0013] Furthermore, a sealing ring C is arranged between the rear output hub body and the rear output piston to ensure the sealing between the right end surface of the rear output piston and the rear output hub body; the oil chamber B is connected to the oil channel B arranged inside the rear output shaft.

[0014] Furthermore, a lubricating sleeve is nested between the rear output shaft and the rear output hub body, and an oil hole is provided on the lubricating sleeve; the oil hole connects the oil chamber B with the oil channel B provided inside the rear output shaft.

[0015] Furthermore, a sealing ring is provided between the lubricating spacer and the rear output hub body to seal the oil circuit.

[0016] A gearbox assembly is provided with any one of the above output clutch pack assemblies.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model discloses an output clutch pack assembly, which is provided with a front output clutch pack assembly and a rear output clutch pack assembly which are connected by gear meshing and have different shafts, wherein the front output clutch pack assembly is a piston external normally closed structure, and the rear output clutch pack assembly is a piston internal normally open structure, which has four-wheel drive / two-wheel drive forms and is convenient and flexible to switch, has a compact and small overall structure, has high power transmission efficiency, good energy-saving effect, high working efficiency, improves gearbox performance and has high economy;

[0019] The utility model discloses a gearbox assembly. The output clutch pack assembly with compact structure and high transmission efficiency is installed in the limited space of the backhoe loader, so that the overall performance of the gearbox of the backhoe loader is greatly improved. The gearbox has four-wheel drive / two-wheel drive mode and is convenient and flexible to switch. The overall structure is compact, the power transmission efficiency is high, the energy-saving effect is good, and the working efficiency is high, which meets the actual needs of flexible switching between high and low speeds and light and heavy loads of the main engine of the backhoe loader. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of the spatial structure of an output clutch pack assembly.

[0021] Figure 2 It is a schematic cross-sectional structural diagram of a front output clutch pack assembly of an output clutch pack assembly of the utility model.

[0022] Figure 3 The utility model is a cross-sectional structural schematic diagram of a rear output clutch pack assembly of an output clutch pack assembly.

[0023] in:

[0024] Front output clutch pack assembly 1, rear output clutch pack assembly 2;

[0025] Front output flange 10, front output gear 11, front output hub body 12, friction plate group A13, oil chamber A14, guide pin 15, front output piston 16, front output shaft 17, disc spring group 18, disc spring sleeve 19, hub body dividing surface 110, retaining ring 111, gasket 112, sealing ring A113, sealing ring B114, sealing ring C115, sealing ring D116, oil passage A117;

[0026] Spring 20, gear 21, rear output gear 22, friction plate group B23, rear output piston 24, rear output shaft 25, rear output flange 26, rear output hub body 27, lubrication spacer 28, sealing ring 29, oil chamber B210, oil hole 211, oil channel B212. DETAILED DESCRIPTION Example

[0027] See also Figures 1 to 3The utility model relates to an output clutch pack assembly, comprising a front output clutch pack assembly 1 and a rear output clutch pack assembly 2 connected by gear meshing;

[0028] The front output clutch assembly 1 is a normally closed piston external structure, comprising a front output shaft 17, a front output gear 11 rotatably arranged on the front output shaft 17, a front output hub body 12 arranged on the front output shaft 17 via a spline, a friction plate group A13 connecting the front output gear 11 and the front output hub body 12, and a front output piston 16 slidably sleeved on the front output shaft 17; the front output shaft 17 is connected to the front axle of the excavator through a front output flange 10;

[0029] The front output hub body 12 is provided with a plurality of hub body dividing surfaces 110, and a plurality of through holes are evenly arranged on the hub body dividing surfaces 110, and a guide pin 15 is slidably arranged in each through hole; the left end surface of the guide pin 15 is in contact with the friction plate group A13, and the right end surface is clamped in the groove of the front output piston 16; the guide pin 15 is pushed by the front output piston 16 to control the contact or separation of the friction plate group A13, so as to realize the binding or unbinding between the front output gear 11 and the front output hub body 12;

[0030] An oil chamber A14 is formed on the left side of the front output piston 16 by the front output hub body 12, the front output shaft 17 and the piston 16. An elastic component for pushing the piston 16 to move left is provided on the front output shaft 17 on the right side of the piston 16. The oil chamber A14 is connected by a sealing ring A113 provided between the guide pin 15 and the front output hub body 12, a sealing ring B114 provided between the front output piston 16 and the front output hub body 12, a sealing ring C115 provided between the front output piston 16 and the front output shaft 17, and a sealing ring D116 provided between the front output shaft 17 and the front output hub body 12. A closed space is formed and communicated with the oil passage A117 provided inside the front output shaft 17; the elastic component comprises a disc spring sleeve 19 slidably sleeved on the front output shaft 17 and a disc spring assembly 18 slidably sleeved on the disc spring sleeve 19; a washer 112 and a retaining ring 111 are provided on the front output shaft 17, the disc spring sleeve 19 and the disc spring assembly 18 perform a translational action between the washer 112 and the front output piston 16, and the translational limit distance of the disc spring sleeve 19 can be controlled by selecting washers 112 of different thicknesses, thereby conveniently controlling and adjusting the preload force and translational limit distance of the front output piston 16;

[0031] Since the front output clutch assembly 1 is a normally closed piston external structure, in a normal state, the front output piston 16 is acted upon by the elastic force of the disc spring group 18 to keep the friction plates of the friction plate group A13 in a fitted state, i.e., in a normally closed state, and the front output gear 11 and the front output hub body 12 are in a combined state of transmitting torque; when it is necessary to open, hydraulic oil is injected into the oil chamber A14 through the oil passage A117, and the oil pressure pushes the front output piston 16 to move rightward against the elastic force of the disc spring group 18 until the disc spring sleeve 19 abuts against the washer 112 to reach the maximum rightward movement distance, so that the friction plates of the friction plate group A13 are separated, and then the front output gear 11 and the front output hub body 12 are untied and disconnected, and the torque cannot be transmitted;

[0032] The rear output clutch assembly 2 is a normally open piston built-in structure, comprising a rear output shaft 25, a rear output gear 22 arranged on the rear output shaft 25 through a spline, a rear output hub body 27 rotatably arranged on the rear output shaft 25 through a needle bearing, a friction plate group B23 connecting the rear output gear 22 and the rear output hub body 27, and a rear output piston 24 slidably nested in the inner ring of the rear output hub body 27; the rear output shaft 25 is connected to the rear axle of the excavator through a rear output flange 26; the rear output piston 24 is in corresponding contact with the friction plate group B23 to control the fitting or separation of the friction plate group B23; a lubricating sleeve 28 is nested between the rear output shaft 25 and the rear output hub body 27, wherein the lubricating sleeve 28 is tightly fitted with the rear output shaft 25, and an oil hole 211 is provided on the lubricating sleeve 28;

[0033] An oil chamber B210 leading to the right end face of the rear output piston 24 is provided on the rear output hub body 27, and the oil chamber B210 is communicated with an oil passage B212 provided inside the rear output shaft 25 through an oil hole 211; a sealing ring C115 is provided between the rear output hub body 27 and the rear output piston 24 to ensure the sealing of the space between the right end face of the rear output piston 24 communicated with the oil chamber B210 and the rear output hub body 27, and a sealing ring 29 is provided between the lubricating spacer 28 and the rear output hub body 27 to seal the oil passage; a spring 20 is provided between the rear output hub body 27 and the left end face of the rear output piston 24, and the spring 20 is guided by the rear output piston 24 and presses the rear output piston 24 to ensure that the rear output piston 24 can be quickly reset when the rear output clutch pack assembly 2 leaks oil;

[0034] Since the rear output clutch assembly 2 is a normally open piston built-in structure, in a normal state, the rear output piston 24 is pressed against the rear output hub body 27 by the pressure of the spring 20, at which time the friction plate group B23 is in a separated state, that is, the rear output hub body 27 and the rear output gear 22 are in a disengaged state, and no torque is transmitted; when it is necessary to close, hydraulic oil is injected into the oil chamber B210 through the oil passage B212 and the oil hole 211, and a high oil pressure area is formed on the right end face of the rear output piston 24, thereby pushing the rear output piston 24 to move to the left against the pressure of the spring 20, pressing the friction plate group B23 so that the friction plates inside the friction plate group B23 are pressed together to form friction, so that the rear output hub body 27 and the rear output gear 22 are combined to transmit torque;

[0035] The front output gear 11 of the front output clutch assembly 1 is meshed and connected with the rear output gear 22 of the rear output clutch assembly 2. Since the gear 21 in the rear output clutch assembly 2 limits the volume of the front output clutch assembly 1, the piston and piston return structure of the front output clutch assembly 1 in this embodiment are externally arranged to meet the overall structural layout requirements of the whole machine;

[0036] Working principle of four-wheel drive: engine power is transmitted through the gearbox, input from the rear output hub body 27, and hydraulic oil is injected into the oil passage B212 of the rear output shaft 25 of the rear output clutch assembly 2. After the hydraulic oil fills the oil chamber B210, it enters the inner cavity space between the right end face of the output piston 24 and the rear output hub body 27. The high-pressure oil pushes the output piston 24 to press the friction plate group B23, so that the power is transmitted to the rear output gear 22 through the friction plate group B23. One power path is transmitted to the rear output flange 26 through the rear output shaft 25, and then transmitted to the rear axle of the excavator through the transmission shaft. Another power path is transmitted to the front output gear 11, transmitted to the front output hub body 12 through the friction plate group A13, and then transmitted to the front output flange 10 through the front output shaft 17, and finally transmitted to the front axle of the excavator through the transmission shaft;

[0037] Working principle of two-wheel drive: Under the above-mentioned four-wheel drive working state, hydraulic oil is injected into the oil passage A117 of the front output shaft 17 of the front output clutch assembly 1 to control the front output piston 16 to press the disc spring group 18 and the disc spring sleeve 19 until the disc spring sleeve 19 rests against the gasket 112. At the same time, the guide pin 15 is driven by the front output piston 16 to disengage from the friction plate group A13, and the front output gear 11 and the front output hub body 12 are separated, so that power cannot be transmitted to the front output flange 10 through the front output gear 11. Example

[0038] On the other hand, the utility model relates to a gearbox assembly, which is equipped with the output clutch pack assembly of the above embodiment. In the limited space of the excavator, the overall performance of the gearbox of the excavator is improved by 20%. The gearbox power of the excavator has front and rear outputs. The front output clutch pack assembly 1 is a normally closed structure with an external piston, and the rear output clutch pack assembly 2 is a normally open structure with an internal piston. The front and rear output clutch pack assemblies are not coaxial, and the front and rear output clutch pack assemblies are meshed through gears.

[0039] During operation, the front output clutch assembly 1 can output without power, and has four-wheel drive / two-wheel drive form. It has sensitive and rapid control, and can meet the flexible switching requirements of high and low speeds, light and heavy load conditions of the host, which is beneficial to improving work efficiency and saving energy, and has high economy. At the same time, the normally open and normally closed matching structure of the output structure meets the compact layout of the gearbox and meets the limited requirements of the space structure of the whole machine.

[0040] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. An output clutch pack assembly, characterized in that: It comprises a front output clutch pack assembly (1) and a rear output clutch pack assembly (2); The front output clutch assembly (1) is a normally closed piston external structure, comprising a front output shaft (17), a front output gear (11) rotatably arranged on the front output shaft (17), a front output hub (12) arranged on the front output shaft (17) via a spline, a friction plate group A (13) connecting the front output gear (11) and the front output hub (12), and a front output piston (16) slidably mounted on the front output shaft (17); a plurality of guide pins (15) are evenly and slidably arranged on the front output hub (12), and the guide pins (15) are pushed by the piston (16) to control the contact or separation of the friction plate group A (13); an oil chamber A (14) is formed on the left side of the piston (16) by the front output hub (12), the front output shaft (17) and the piston (16), and an elastic component is arranged on the front output shaft (17) on the right side of the piston (16) to push the piston (16) to move leftward; The rear output clutch assembly (2) is a normally open piston built-in structure, comprising a rear output shaft (25), a rear output gear (22) arranged on the rear output shaft (25) via a spline, a rear output hub body (27) rotatably arranged on the rear output shaft (25), a friction plate group B (23) connecting the rear output gear (22) and the rear output hub body (27), and a rear output piston (24) slidably nested in the inner ring of the rear output hub body (27); the rear output piston (24) is in corresponding contact with the friction plate group B (23) to control the contact or separation of the friction plate group B (23); an oil chamber B (210) leading to the right end surface of the rear output piston (24) is provided on the rear output hub body (27), and a spring (20) is provided between the rear output hub body (27) and the left end surface of the rear output piston (24); The front output gear (11) of the front output clutch assembly (1) and the rear output gear (22) of the rear output clutch assembly (2) are meshingly connected.

2. The output clutch pack assembly according to claim 1, characterized in that: The front output hub body (12) is provided with a plurality of hub body dividing surfaces (110); the guide pin (15) is slidably embedded in a through hole on the hub body dividing surface (110).

3. The output clutch pack assembly according to claim 1, characterized in that: The oil chamber A (14) forms a closed space through a sealing ring A (113) arranged between the guide pin (15) and the front output hub body (12), a sealing ring B (114) arranged between the front output piston (16) and the front output hub body (12), and a sealing ring C (115) arranged between the front output piston (16) and the front output shaft (17), and is communicated with an oil passage A (117) arranged inside the front output shaft (17).

4. The output clutch pack assembly according to claim 1, characterized in that: The elastic component comprises a disc spring sleeve (19) slidably mounted on the front output shaft (17), and a disc spring assembly (18) slidably mounted on the disc spring sleeve (19); a washer (112) and a retaining ring (111) are arranged on the front output shaft (17), and the disc spring sleeve (19) and the disc spring assembly (18) perform a translational motion between the washer (112) and the front output piston (16).

5. The output clutch pack assembly according to claim 1, characterized in that: A sealing ring C (115) is provided between the rear output hub body (27) and the rear output piston (24) to ensure sealing between the right end surface of the rear output piston (24) and the rear output hub body (27); the oil chamber B (210) is communicated with an oil passage B (212) provided inside the rear output shaft (25).

6. The output clutch pack assembly according to claim 1, characterized in that: A lubricating sleeve (28) is nested between the rear output shaft (25) and the rear output hub body (27), and an oil hole (211) is provided on the lubricating sleeve (28); the oil hole (211) connects the oil chamber B (210) and an oil passage B (212) provided inside the rear output shaft (25).

7. The output clutch pack assembly according to claim 6, characterized in that: A sealing ring (29) is provided between the lubricating spacer (28) and the rear output hub body (27) to seal the oil circuit.

8. A gearbox assembly, characterized in that: An output clutch pack assembly according to any one of claims 1 to 7 is installed.

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