All-working-condition efficient loader electric drive axle

Abstract

An all-working-condition efficient loader electric drive axle comprises a front axle drive unit, the front axle drive unit comprises a front axle drive motor and a front axle input shaft which are in transmission connection, the front axle input shaft is in transmission connection with a front axle output half shaft through a front axle speed reducing mechanism, and the front axle output half shaft is connected with a front wheel set; the rear axle driving unit comprises a rear axle driving motor and a rear axle input shaft which are in transmission connection, the rear axle input shaft is in transmission connection with a rear axle output half shaft through a rear axle speed reducing mechanism, and the rear axle output half shaft is connected with a rear wheel set; and the rear axle driving motor is an asynchronous driving motor. According to the electric drive axle of the loading machine, the power transmission path of the loading machine is effectively simplified, the transmission efficiency of the loading machine is greatly improved, and the working requirements of all working conditions of the loading machine can be met. The rear axle asynchronous motor is matched with a high-speed bearing so as to meet the reverse dragging working condition requirement of untwisting.

Description

Technical Field

[0001] The utility model relates to the field of loader transmission drive systems, in particular to a full-operating-condition high-efficiency loader electric drive axle. Background Art

[0002] The drive system of the loader currently includes the traditional internal combustion engine drive and the pure electric drive system that is gradually becoming popular. Compared with the traditional fuel drive system, the pure electric drive system has shown significant advantages in environmental protection, economy, safety, and efficiency, and is an important equipment for promoting green mines and green development concepts. However, the pure electric drive system has limited mileage, and the drive system needs to provide sufficient output power and torque when the loader is operating. The loader's electric drive system needs to meet its various complex working conditions. While providing sufficient torque output for complex working conditions, it should also be able to reasonably allocate power and provide a matching drive mode to improve transmission efficiency.

[0003] Through searching, technical documents on the electric drive system of loaders have been disclosed in the prior art. For example, the utility model patent authorization announcement document with the publication number "CN219172158U" and the name "A dual-motor four-wheel drive system and loader". A dual-motor four-wheel drive system and a loader are provided, by setting a first motor and a second motor, the first motor and the second motor are both connected to the front drive axle and the rear drive axle; wherein a first disengagement device is provided between the first motor and the front drive axle and the rear drive axle, and / or a second disengagement device is provided between the second motor and the front drive axle and the rear drive axle. The technical solution provided by the prior art has a complex structural design, reduced efficiency of power transmission, and poor reliability.

[0004] For example, the utility model patent authorization announcement document with the publication number "CN219467531U" and the name "A kind of electric loader transmission device". A kind of electric loader transmission device includes a front drive axle, a rear drive axle and tires installed on the front drive axle and the rear drive axle, and also includes a dual-axis drive motor, a front gearbox, a rear gearbox and a whole machine controller; the dual-axis drive motor includes a front output shaft and a rear output shaft; the front output shaft is connected to the front gearbox, and the rear output shaft is connected to the rear gearbox; the front gearbox is connected to the front drive axle through the front transmission shaft, and the rear gearbox is connected to the rear drive axle through the rear transmission shaft; the front gearbox has a front shift control mechanism, and the rear gearbox has a rear shift control mechanism. The whole machine controller is connected to the front gearbox and the rear gearbox, and is used to control the front shift control structure and the rear shift control mechanism. In this prior art solution, a single single machine is used to drive the front and rear axles of the loader, and it is difficult to use the torque and power distribution under complex working conditions. Therefore, it is of great significance to propose a loader electric drive axle that can adapt to all working conditions and has high transmission efficiency in this field. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a full-operating-mode high-efficiency loader electric drive axle, comprising:

[0006] A front axle drive unit, the front axle drive unit comprising a front axle drive motor and a front axle input shaft which are drivingly connected, the front axle input shaft is drivingly connected to a front axle output half shaft through a front axle reduction mechanism, and the front axle output half shaft is connected to a front wheel set;

[0007] A rear axle drive unit, the rear axle drive unit comprising a rear axle drive motor and a rear axle input shaft which are connected in a transmission manner, the rear axle input shaft being connected in a transmission manner to a rear axle output half shaft through a rear axle reduction mechanism, and the rear axle output half shaft being connected to a rear wheel set;

[0008] The rear axle drive motor is an asynchronous drive motor.

[0009] Furthermore, the rear axle reduction mechanism includes a rear axle reduction output shaft drivingly connected to the rear axle output half shaft, a rear axle input shaft and a rear axle intermediate shaft and a rear axle first-stage reduction gear set therebetween, a rear axle second-stage reduction gear set between the rear axle intermediate shaft and the rear axle reduction output shaft, and a rear axle third-stage reduction gear set between the rear axle reduction output shaft and the rear axle output half shaft.

[0010] Furthermore, the rear axle first-stage reduction gear set includes a rear axle input driving gear and a rear axle intermediate driven gear 1; the rear axle second-stage reduction gear set includes a rear axle intermediate driven gear 2 and a rear axle output shaft driven gear 1; the rear axle third-stage reduction gear set includes a rear axle output shaft driven gear 2 and a rear axle third-stage output gear.

[0011] Furthermore, the front axle reduction mechanism includes a front axle input shaft and a front axle intermediate shaft and a front axle first-stage reduction gear set between the two, a front axle second-stage reduction gear set between the front axle intermediate shaft and the front axle reduction output shaft, and a front axle third-stage reduction gear set between the front axle reduction output shaft and the front axle output half shaft.

[0012] Furthermore, the front axle two-stage reduction gear set includes a two-speed reduction gear set and a shift mechanism.

[0013] Furthermore, the front axle first-stage reduction gear set includes a front axle input driving gear and a front axle intermediate driven gear 1; the front axle second-stage reduction gear set includes a front axle intermediate driven gear 2 and a front axle output shaft driven gear 1, and also includes a front axle intermediate driven gear 3 and a front axle output shaft second-speed driven gear. The front axle output shaft driven gear 1 and the front axle output shaft second-speed driven gear are empty on the front axle reduction output shaft, and the shifting mechanism is located between the front axle output shaft driven gear 1 and the front axle output shaft second-speed driven gear; the front axle third-stage reduction gear set includes a front axle output shaft driven gear 2 and a front axle third-stage output gear.

[0014] Furthermore, the front axle drive motor is a synchronous drive motor.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The electric drive axle of the loader proposed by the utility model effectively simplifies the power transmission path of the loader, greatly improves the transmission efficiency of the loader, and can meet the working requirements of the loader under all working conditions.

[0017] 2. The asynchronous motor on the rear axle is matched with a high-speed bearing to meet the requirements of torque-removing and reverse-drag working conditions.

[0018] 3. The front and rear axle distributed drive allows the front and rear axles to distribute power independently and flexibly, and there is no power interruption during the gear shifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Schematic diagram of the front axle drive unit structure;

[0020] Figure 2 : Schematic diagram of the rear axle drive unit structure.

[0021] Description of reference numerals:

[0022] 1. Front axle drive unit; 101. Front axle drive motor; 102. Front axle output half shaft; 103. Front axle input shaft; 104. Front axle reduction output shaft; 105. Front axle input driving gear; 106. Front axle primary driven gear; 107. Front axle secondary driving gear; 108. Front axle secondary output gear; 109. Front axle inter-wheel differential; 2. Front axle drive unit; 201. Front axle drive motor; 202. Front axle output half shaft; 203. Front 1. Front axle input shaft; 204. Front axle reduction output shaft; 205. Rear axle intermediate shaft; 206. Rear axle input driving gear; 207. Rear axle intermediate driven gear one; 208. Rear axle intermediate driven gear two; 209. Rear axle output shaft driven gear one; 210. Rear axle output shaft driven gear two; 211. Rear axle third-stage output gear; 212. Rear axle inter-wheel differential; 213. Rear axle intermediate driven gear three; 214. Rear axle output shaft second-speed driven gear. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 and Figure 2 As shown, a full-operating condition high-efficiency loader electric drive axle comprises:

[0025] A front axle drive unit 1, the front axle drive unit 1 comprising a front axle drive motor 101 and a front axle input shaft 103 which are connected in driving connection, the front axle input shaft 103 being connected in driving connection to a front axle output half shaft 102 through a front axle reduction mechanism, and the front axle output half shaft 102 being connected to a front wheel set;

[0026] A rear axle drive unit 2, the rear axle drive unit 2 comprising a rear axle drive motor 201 and a rear axle input shaft 203 which are connected in a transmission manner, the rear axle input shaft 203 being connected in a transmission manner to a rear axle output half shaft 202 via a rear axle reduction mechanism, and the rear axle output half shaft 202 being connected to a rear wheel set;

[0027] The rear axle drive motor 201 is an asynchronous drive motor.

[0028] In this embodiment, the front and rear axles are each driven by an independent drive motor, making the power torque distribution of the electric drive axle more flexible and controllable. The rear axle drive unit uses an asynchronous motor matched with a high-speed bearing to meet the requirements of the reverse drag working condition of unloading torque.

[0029] In a more preferred embodiment, the rear axle reduction mechanism includes a rear axle reduction output shaft 204 that is transmission-connected to the rear axle output half shaft 202, as well as a rear axle first-stage reduction gear set between the rear axle input shaft 203 and the rear axle intermediate shaft 205, a rear axle second-stage reduction gear set between the rear axle intermediate shaft 205 and the rear axle reduction output shaft 204, and a rear axle third-stage reduction gear set between the rear axle reduction output shaft 204 and the rear axle output half shaft 202.

[0030] In this embodiment, the rear axle drive unit 2 is designed as a three-stage reduction gear, specifically a three-stage parallel shaft with a large speed ratio torque increase, so it can meet the maximum driving requirements of the loader. At the same time, the matching speed is 0-16km / h, meeting the needs of the full speed range of the operation process.

[0031] In a more preferred embodiment, the rear axle first-stage reduction gear set includes a rear axle input driving gear 206 and a rear axle intermediate driven gear 1 207; the rear axle second-stage reduction gear set includes a rear axle intermediate driven gear 208 and a rear axle output shaft driven gear 1 209; the rear axle third-stage reduction gear set includes a rear axle output shaft driven gear 210 and a rear axle third-stage output gear 211.

[0032] In this embodiment, the rear axle input driving gear 206 and the rear axle intermediate driven gear 1 207 are meshed with each other to achieve a first-stage deceleration and torque increase, the rear axle intermediate driven gear 2 208 and the rear axle output shaft driven gear 1 209 are meshed to achieve a second-stage deceleration and torque increase, and the rear axle output shaft driven gear 2 210 and the rear axle third-stage output gear 211 achieve a third-stage deceleration and torque increase. The overall parallel shaft deceleration mechanism is simple and reliable in structure, and the third-stage deceleration and torque increase realizes a large torque output of the main working unit.

[0033] In a more preferred embodiment, the front axle first-stage reduction gear set includes a front axle input driving gear 106 and a front axle intermediate driven gear 107; the front axle second-stage reduction gear set includes a front axle intermediate driven gear 2 108 and a front axle output shaft driven gear 109, and also includes a front axle intermediate driven gear 3 113 and a front axle output shaft second gear driven gear 114. The front axle output shaft driven gear 109 and the front axle output shaft second gear driven gear 114 are mounted on the front axle reduction output shaft 104, and the shifting mechanism is located between the front axle output shaft driven gear 109 and the front axle output shaft second gear driven gear 114; the front axle third-stage reduction gear set includes a front axle output shaft driven gear 2 110 and a front axle third-stage output gear 111.

[0034] In this embodiment, the front axle input driving gear 106 and the front axle intermediate driven gear 1 107 are meshed and connected to achieve a first-stage speed reduction and torque increase. The front axle intermediate driven gear 2 108 and the front axle output shaft driven gear 1 109 are meshed and connected, and have a first-speed speed reduction gear ratio for speed reduction and torque increase. The front axle intermediate driven gear 3 113 and the front axle output shaft second-speed driven gear 114 are meshed and connected, and have a second-speed speed reduction gear ratio for torque increase. The front axle output shaft driven gear 109 and the front axle output shaft second gear driven gear 114 are mounted on the front axle reduction output shaft 104, but the front axle output shaft driven gear 109 and the front axle output shaft second gear driven gear 114 are always meshed with the front axle intermediate driven gear 2 108 and the front axle intermediate driven gear 3 113 respectively. When a gear shift operation is required, the front axle intermediate driven gear 2 108 with a first gear reduction gear ratio and the front axle output shaft driven gear 109 are connected in power, or the front axle intermediate driven gear 3 113 with a second gear reduction gear ratio and the front axle output shaft second gear driven gear 114 are connected in power, thereby achieving corresponding power torque output according to the working condition requirements of the loader.

[0035] In this embodiment, the front axle output half shaft 102 is connected to the rear wheel set through the front axle inter-wheel differential 112, and the front axle output half shaft 102 is connected to the front wheel set through the front axle inter-wheel differential 112. The function of the inter-wheel differential is to realize the differential drive of the front and rear wheel sets to meet the curve driving requirements of the loader.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A full-operation high-efficiency electric drive axle for a loader, characterized in that: include, A front axle drive unit (1), the front axle drive unit (1) comprising a front axle drive motor (101) and a front axle input shaft (103) which are transmission-connected, the front axle input shaft (103) being transmission-connected to a front axle output half shaft (102) via a front axle reduction mechanism, and the front axle output half shaft (102) being connected to a front wheel assembly; A rear axle drive unit (2), the rear axle drive unit (2) comprising a rear axle drive motor (201) and a rear axle input shaft (203) which are transmission-connected, the rear axle input shaft (203) being transmission-connected to a rear axle output half shaft (202) via a rear axle reduction mechanism, and the rear axle output half shaft (202) being connected to a rear wheel assembly; The rear axle drive motor (201) is an asynchronous drive motor.

2. The all-operating-mode high-efficiency loader electric drive axle according to claim 1, characterized in that: The rear axle reduction mechanism comprises a rear axle reduction output shaft (204) drivingly connected to the rear axle output half shaft (202), a rear axle input shaft (203) and a rear axle intermediate shaft (205) and a rear axle primary reduction gear set between the two, a rear axle secondary reduction gear set between the rear axle intermediate shaft (205) and the rear axle reduction output shaft (204), and a rear axle tertiary reduction gear set between the rear axle reduction output shaft (204) and the rear axle output half shaft (202).

3. The all-operating-mode high-efficiency loader electric drive axle according to claim 2, characterized in that: The rear axle primary reduction gear set comprises a rear axle input driving gear (206) and a rear axle intermediate driven gear 1 (207); the rear axle secondary reduction gear set comprises a rear axle intermediate driven gear 2 (208) and a rear axle output shaft driven gear 1 (209); and the rear axle tertiary reduction gear set comprises a rear axle output shaft driven gear 2 (210) and a rear axle tertiary output gear (211).

4. The all-operating-mode high-efficiency loader electric drive axle according to claim 1, characterized in that: The front axle reduction mechanism comprises a front axle input shaft (103) and a front axle intermediate shaft (105) and a front axle primary reduction gear set between the two, a front axle secondary reduction gear set between the front axle intermediate shaft (105) and the front axle reduction output shaft (104), and a front axle tertiary reduction gear set between the front axle reduction output shaft (104) and the front axle output half shaft (102).

5. The all-operating-mode high-efficiency loader electric drive axle according to claim 4, characterized in that: The front axle two-stage reduction gear set includes a two-speed reduction gear set and a shift mechanism.

6. The all-operating-mode high-efficiency loader electric drive axle according to claim 5, characterized in that: The front axle primary reduction gear set comprises a front axle input driving gear (106) and a front axle intermediate driven gear one (107); the front axle secondary reduction gear set comprises a front axle intermediate driven gear two (108) and a front axle output shaft driven gear one (109), and also comprises a front axle intermediate driven gear three (113) and a front axle output shaft second gear driven gear (114); the front axle output shaft driven gear one (109) and the front axle output shaft second gear driven gear (114) are mounted on the front axle reduction output shaft (104), and the shift mechanism is located between the front axle output shaft driven gear one (109) and the front axle output shaft second gear driven gear (114); the front axle three-stage reduction gear set comprises a front axle output shaft driven gear two (110) and a front axle three-stage output gear (111).

7. The all-operating-mode high-efficiency loader electric drive axle according to claim 6, characterized in that: The front axle drive motor (101) is a synchronous drive motor.

Images