Power transmission and loader

Abstract

The utility model belongs to the technical field of engineering machinery, disclose a kind of power transmission device and loader.Power transmission device includes motor, input shaft, reduction gearbox, gear set, first output shaft, lubricating pump and second output shaft.Input shaft one end is connected with motor shaft of motor;Reduction gearbox includes planetary gear train, and the input of planetary gear train is connected with the other end of input shaft;Gear set includes first gear and second gear meshing with each other, and first gear is connected with the output of planetary gear train;First output shaft one end is connected with first gear or output, and the other end of first output shaft is connected with pump shaft of lubricating pump;Second output shaft is connected with second gear, and second output shaft can drive walking system.The power transmission device can drive walking system and lubricating pump to work simultaneously by a motor, simplify structure and reduce cost, when motor fails, lubricating pump and reduction gearbox stop working simultaneously, reduce the probability of reduction gearbox failure.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a power transmission device and a loader. Background Technology

[0002] Currently, most new energy loaders employ a power transmission system using a combination of a drive motor driving a two- or multi-speed gearbox. In this structure, the drive motor powers the walking system, while the lubrication pump in the lubrication system is driven by a second drive motor (i.e., borrowing the hydraulic motor from the hydraulic system). In other words, this power transmission system uses two drive motors to drive the walking system and the lubrication system respectively. This design is complex and energy-intensive. Furthermore, if the second drive motor fails to start or malfunctions, the lubrication system cannot provide the necessary lubrication fluid. If the first drive motor is still operating, this can easily lead to gearbox failure. On the other hand, when the machine is traveling unloaded, the second drive motor (i.e., the hydraulic motor in the hydraulic system) needs to drive the lubrication pump and cannot stop, resulting in no-load energy consumption for the hydraulic pump in the hydraulic system. Utility Model Content

[0003] The purpose of this invention is to provide a power transmission device and a loader that simplifies the structure and reduces costs.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] The power transmission device includes:

[0006] Electric motor;

[0007] An input shaft, one end of which is connected to the motor shaft of the motor;

[0008] A gearbox, including a planetary gear train, wherein the input element of the planetary gear train is connected to the other end of the input shaft;

[0009] The gear set includes a first gear and a second gear that mesh with each other, the first gear being connected to the output component of the planetary gear train;

[0010] A first output shaft and a lubrication pump, one end of the first output shaft is connected to the first gear or the output component, and the other end of the first output shaft is connected to the pump shaft of the lubrication pump;

[0011] The second output shaft is connected to the second gear and is used to drive the walking system.

[0012] As an alternative, the sun gear in the planetary gear train is the input component, the planet carrier in the planetary gear train is the output component, and the ring gear in the planetary gear train is fixedly installed.

[0013] As an alternative, the sun gear in the planetary gear train is the input component, the ring gear in the planetary gear train is the output component, and the planet carrier in the planetary gear train is fixedly installed.

[0014] As an alternative, the input axis and the first output axis are coaxially arranged.

[0015] As an alternative, the first output shaft and the second output shaft are arranged in parallel.

[0016] As an alternative, the oil inlet of the lubrication pump is connected to the gearbox housing, and a filter is installed on the pipeline connecting the oil inlet of the lubrication pump and the gearbox housing.

[0017] As an alternative, the lubrication pump is a unidirectional flow bidirectional rotary lubrication pump.

[0018] As an optional solution, the motor is a wide-range torque-adjustable speed-regulating motor.

[0019] A loader, comprising a walking system and a power transmission device as described in any of the above embodiments, wherein the second output shaft is connected to the walking system.

[0020] The beneficial effects of this utility model are:

[0021] The power transmission device provided by this utility model connects the output component of a planetary gear train to a first gear, and the first gear or output component is connected to the pump shaft of a lubrication pump via a first output shaft. This allows the motor, when driving the motor shaft to rotate, to simultaneously drive the input component of the planetary gear train to rotate via the input shaft. The input component of the planetary gear train drives the output component of the planetary gear train to rotate simultaneously, and the output component of the planetary gear train simultaneously drives the first gear to rotate. The first gear, through a second gear, drives the second output shaft to rotate, thereby driving the walking system. Simultaneously, the first gear or output component drives the first output shaft to rotate, thereby driving the pump shaft of the lubrication pump to operate. This power transmission device can simultaneously drive the walking system and the lubrication pump with a single motor. On the one hand, it simplifies the structure and reduces costs. Furthermore, when the motor fails, both the lubrication pump and the gearbox stop working simultaneously, reducing the probability of gearbox failure. On the other hand, compared to existing technologies, the motor in this power transmission device is not connected to the hydraulic motor in the hydraulic system, indirectly reducing energy consumption and noise. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the power transmission device provided in an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Electric motor;

[0025] 2. Input axis;

[0026] 3. Planetary gear train; 31. Sun gear; 32. Planet carrier; 33. Ring gear;

[0027] 4. Gear set; 41. First gear; 42. Second gear;

[0028] 5. First output shaft;

[0029] 6. Lubrication pump; 61. Filter;

[0030] 7. Second output shaft;

[0031] 8. Gearbox housing. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1As shown, this utility model embodiment provides a power transmission device, which includes a motor 1, an input shaft 2, a reduction gearbox, a gear set 4, a first output shaft 5, a lubrication pump 6, and a second output shaft 7.

[0037] The input shaft 2 is connected to the motor shaft of the motor 1 at one end (the input shaft 2 and the motor shaft of the motor 1 can be connected by a coupling, or the input shaft 2 can also be the motor shaft of the motor 1); the gearbox includes a planetary gear train 3, the input component of the planetary gear train 3 is connected to the other end of the input shaft 2 (a key or spline connection can be used); the gear set 4 includes a first gear 41 and a second gear 42 that mesh with each other, the first gear 41 is connected to the output component of the planetary gear train 3, so that the first gear 41 and the output component of the planetary gear train 3 can rotate synchronously; one end of the first output shaft 5 is connected to the first gear 41 (a key connection can be used) or to the output component, and the other end of the first output shaft 5 is connected to the pump shaft of the lubrication pump 6, so that the first output shaft 5 drives the lubrication pump 6 to operate; the second output shaft 7 is connected to the second gear 42, so that the second output shaft 7 and the second gear 42 can rotate synchronously, and the second output shaft 7 can drive the walking system, that is, when the second output shaft 7 rotates, it can drive the walking system to realize the loader's movement.

[0038] This power transmission device connects the output component of the planetary gear train 3 to the first gear 41, and the first gear 41 is connected to the pump shaft of the lubrication pump 6 via the first output shaft 5. This allows the motor 1 to drive the rotation of its motor shaft, which in turn drives the rotation of the input component of the planetary gear train 3 via the input shaft 2. Simultaneously, the input component of the planetary gear train 3 drives the output component of the planetary gear train 3 to rotate, and the output component of the planetary gear train 3 drives the first gear 41 to rotate. The first gear 41, through the second gear 42, drives the second output shaft 7 to rotate, thereby driving the walking system. Simultaneously, the first gear 41 or its output component drives the first output shaft 5 to rotate, thus driving the pump shaft of the lubrication pump 6 to operate. This power transmission device, using a single motor 1, can simultaneously drive the walking system and the lubrication pump 6. On one hand, this simplifies the structure and reduces costs. Furthermore, when the motor 1 fails, the lubrication pump 6 and the gearbox simultaneously stop working, reducing the probability of gearbox failure. On the other hand, compared to existing technologies, the motor 1 in this power transmission device is not connected to the hydraulic motor in the hydraulic system, indirectly reducing energy consumption and noise.

[0039] In this embodiment, the sun gear 31 in the planetary gear train 3 is an input component, and the input shaft 2 is connected to the sun gear 31 so that when the motor 1 drives the input shaft 2 to rotate through the motor shaft, it can simultaneously drive the sun gear 31 to rotate.

[0040] In one embodiment, the planet carrier 32 in the planetary gear train 3 is an output component, the ring gear 33 in the planetary gear train 3 is fixedly installed, the planet carrier 32 is connected to the first gear 41, and when the sun gear 31 rotates, it can drive the planet carrier 32 to rotate through the planet gears in the planetary gear train 3. It can be understood that the first output shaft 5 can be connected to the planet carrier 32 so that the planet carrier 32 can directly drive the first output shaft 5 to rotate.

[0041] In another embodiment, the ring gear 33 in the planetary gear train 3 is an output component. The planet carrier 32 in the planetary gear train 3 is fixedly installed, and the ring gear 33 is connected to the first gear 41. When the sun gear 31 rotates, it can drive the ring gear 33 to rotate through the planet gears in the planetary gear train 3. It can be understood that the first output shaft 5 can be connected to the ring gear 33 so that the ring gear 33 can directly drive the first output shaft 5 to rotate.

[0042] Specifically, the input shaft 2 and the first output shaft 5 are coaxially arranged, and the first output shaft 5 and the second output shaft 7 are parallel to each other, so that the positional distribution of the components is reasonable and the structural compactness is improved.

[0043] In this embodiment, the oil inlet of the lubrication pump 6 is connected to the bottom of the gearbox housing 8, so that the lubrication pump 6 can draw in oil from the gearbox housing 8 or the gearbox housing 8 during operation and output it through the oil outlet of the lubrication pump 6 to lubricate the internal parts of the gearbox housing 8. Of course, the oil inlet of the lubrication pump 6 can also be connected to the hydraulic oil tank of the whole machine.

[0044] To ensure the cleanliness of the oil output by the lubrication pump 6, a filter 61 is specifically installed on the pipeline connecting the oil inlet of the lubrication pump 6 and the gearbox housing 8. When the lubrication pump 6 draws in the oil from the gearbox housing 8, it first passes through the filter 61 for filtration to ensure that there are no impurities in the oil.

[0045] Optionally, the lubrication pump 6 can be selected as a unidirectional flow bidirectional rotary lubrication pump, which enables the motor 1 to pump oil outward for lubrication whether it is rotating forward or in reverse.

[0046] Optionally, motor 1 may be a wide-range torque speed-regulating motor, which has a wide range of maximum speed and maximum torque to meet high-speed or low-speed operating conditions.

[0047] This utility model embodiment also provides a loader that uses the above-mentioned power transmission device. Through this power transmission device, the reduction gearbox is a continuously variable transmission to replace the two- or multi-speed gearbox in the prior art, which effectively solves the problem of shift shock. Moreover, the working of the walking system and the lubrication pump 6 are simultaneously driven by a single motor 1, which simplifies the structure and reduces the cost.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A power transmission device, characterized in that, include: Motor (1); The input shaft (2) has one end connected to the motor shaft of the motor (1); The gearbox includes a planetary gear train (3), the input of which is connected to the other end of the input shaft (2); The gear set (4) includes a first gear (41) and a second gear (42) that mesh with each other, and the first gear (41) is connected to the output component of the planetary gear train (3); The first output shaft (5) and the lubrication pump (6) are connected. One end of the first output shaft (5) is connected to the first gear (41) or the output component, and the other end of the first output shaft (5) is connected to the pump shaft of the lubrication pump (6). The second output shaft (7) is connected to the second gear (42) and is used to drive the walking system.

2. The power transmission device according to claim 1, characterized in that, The sun gear (31) in the planetary gear train (3) is the input component, the planet carrier (32) in the planetary gear train (3) is the output component, and the ring gear (33) in the planetary gear train (3) is fixedly installed.

3. The power transmission device according to claim 1, characterized in that, The sun gear (31) in the planetary gear train (3) is the input component, the ring gear (33) in the planetary gear train (3) is the output component, and the planet carrier (32) in the planetary gear train (3) is fixedly installed.

4. The power transmission device according to claim 1, characterized in that, The input shaft (2) and the first output shaft (5) are coaxially arranged.

5. The power transmission device according to claim 1, characterized in that, The first output shaft (5) and the second output shaft (7) are arranged in parallel.

6. The power transmission device according to claim 1, characterized in that, The oil inlet of the lubrication pump (6) is connected to the gearbox housing (8), and a filter (61) is provided on the pipeline connecting the oil inlet of the lubrication pump (6) and the gearbox housing (8).

7. The power transmission device according to claim 1, characterized in that, The lubrication pump (6) is a unidirectional flow bidirectional rotary lubrication pump.

8. The power transmission device according to claim 1, characterized in that, The motor (1) is a wide-range torque speed-regulating motor.

9. A loader, characterized in that, It includes a walking system and a power transmission device as described in any one of claims 1-8, wherein the second output shaft (7) is connected to the walking system.

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