Drive axle assembly structure and drive axle

Abstract

The utility model discloses a drive axle assembly structure and drive axle, drive axle assembly structure includes axle housing, two half axle and speed reducer, the top of axle housing forms a mounting seat, and the bridge package of axle housing corresponds with mounting seat and its top forms a mounting face, and the mounting face is used to install the frame, the speed reducer is connected on the front lateral wall of axle housing, including fixed in the axle housing front lateral wall's reduction shell, the first speed reducer of being located in the reduction shell and the second speed reducer of being located in the bridge package, the first speed reducer includes the input shaft and transmission shaft that rotate and connect in the reduction shell, and the lower extreme of input shaft is equipped with input gear, and transmission shaft is located below input shaft and is equipped with the transmission gear that meshes with input gear, the second speed reducer is located between two half axle and is connected with transmission shaft and two half axle. Through this structural design, not only reduces the installation space, and the whole machine rotary mechanism can be integrated with the frame to make it can be installed on the mounting seat, thereby simplifying the structure under the condition of saving installation space.

Description

Technical Field

[0001] This utility model relates to the field of drive axle technology, specifically to a drive axle assembly structure and a drive axle. Background Technology

[0002] The drive axle of the port RTG crane includes an axle housing, two half-shafts, and a reducer. The axle housing has two frame mounting seats for mounting the chassis, which are located at both ends of the axle housing. The two half-shafts are located inside the axle housing. The reducer is connected to the front side of the axle housing and to the half-shafts. However, the aforementioned drive axle is quite wide. On the one hand, it occupies a large amount of overall machine layout space (installation space), which is not conducive to the overall machine layout. On the other hand, it is necessary to design a mounting seat for the machine's slewing mechanism on the chassis, resulting in a complex structure and high cost. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a drive axle assembly structure and drive axle that saves installation space and simplifies the structure by setting a mounting seat on the top of the axle housing.

[0004] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: The drive axle assembly structure includes an axle housing, two half-shafts rotatably connected within the axle housing, and a reducer connected to the axle housing; A mounting base is formed on the top of the axle housing, the mounting base corresponds to the axle bundle of the axle housing and has a mounting surface formed on its top, the mounting surface being used to mount the vehicle frame; The reducer is connected to the front sidewall of the axle housing and includes a reducer housing fixed to the front sidewall of the axle housing, a first reducer disposed within the reducer housing, and a second reducer disposed within the axle housing. The first reducer includes an input shaft and a transmission shaft rotatably connected within the reducer housing. The lower end of the input shaft is provided with an input gear, and the transmission shaft is located below the input shaft and is provided with a transmission gear meshing with the input gear. The second reducer is located between the two half-shafts and is connected to the transmission shaft and the two half-shafts.

[0005] Furthermore, the mounting base is located in the middle of the axle housing and protrudes upward from the top surface of the axle housing. A mounting flange is formed on the top of the mounting base, and the top surface of the mounting flange is the mounting surface. The mounting base also has a weight-reducing hole located between the top surface of the axle housing and the mounting flange, and the weight-reducing hole extends through the mounting base from front to back.

[0006] Furthermore, the mounting base forms a reinforcing plate on each of its two opposite outer sidewalls along the radial direction of the half-axis, located between the top surface of the bridge housing and the bottom surface of the mounting flange. The reinforcing plate is connected to the bottom surface of the mounting flange and the top surface of the bridge housing and is provided with a weight-reducing hole, which extends through the reinforcing plate from front to back.

[0007] Furthermore, the housing has two bearing seats located below the input shaft and distributed front to back within its inner cavity. Each bearing seat has a lower shaft hole that extends through it from front to back. The two lower shaft holes correspond to each other. The front end of the transmission shaft is rotatably engaged with one of the lower shaft holes via a bearing, and the rear end of the transmission shaft is rotatably engaged with the other lower shaft hole via another bearing. An adjusting ring is also threaded into each lower shaft hole. The adjusting ring is located on the side of the bearing away from the transmission gear and abuts against the end face of the bearing.

[0008] Furthermore, the two bearings are located in front of and behind the transmission gear, respectively. The adjusting ring abuts against the outer ring end face of the bearing, and its end face away from the bearing is provided with a plurality of protruding teeth, which are distributed circumferentially along the adjusting ring.

[0009] Furthermore, the housing has two upper shaft holes distributed vertically within its inner cavity. The upper end of the input shaft is rotatably engaged with one of the upper shaft holes via an upper bearing, and the lower end of the input shaft is rotatably engaged with the other upper shaft hole via a lower bearing. The input gear is located below the lower bearing. A transmission gear is provided at the front end of the transmission shaft. A spacer is sleeved on the input shaft, and the upper and lower ends of the spacer abut against the upper bearing and the lower bearing, respectively.

[0010] Furthermore, the reducing housing includes a sleeve, which is fixed to the top of the front end of the reducing housing and its lower end extends into the inner cavity of the reducing housing. The inner cavity of the sleeve communicates with the inner cavity of the reducing housing and is provided with the two upper shaft holes. The input gear is located below the sleeve. An oil passage is opened on the lower end face of the sleeve, located between the lower bearing and the transmission gear. The oil passage communicates with the inner cavity of the sleeve and the inner cavity of the reducing housing.

[0011] Furthermore, the oil passage penetrates the outer peripheral wall of the sleeve and forms an upper oil port above the lower bearing and a lower oil port above the transmission gear on the inner peripheral wall and lower end face of the sleeve, respectively. The upper end of the input shaft extends upward through the sleeve and is connected to an input flange located above the sleeve. The input flange is horizontally positioned.

[0012] Furthermore, the second reducer includes a gear assembly and an output shaft rotatably connected within the reducer housing and located between the drive shaft and the gear assembly. The gear assembly is located between and connected to the two half-shafts. The output shaft is connected to the drive shaft and has an output gear that meshes with the driven gear of the gear assembly. The output shaft is coaxial with the drive shaft and both are perpendicular to the half-shafts and the input shaft. The front end of the reducer housing has an input flange connected to the input shaft.

[0013] The drive axle assembly structure of this utility model has a mounting seat corresponding to the axle housing on the top of the axle housing. The top of the mounting seat has a mounting surface for mounting the vehicle frame. This not only reduces the installation space, but also allows the entire rotating mechanism to be integrated with the vehicle frame so that it can be mounted on the mounting seat. This simplifies the structure while saving installation space, which is beneficial for the overall layout and reduces costs.

[0014] This utility model embodiment also provides a drive axle, including the drive axle assembly structure described in any of the above embodiments. Attached Figure Description

[0015] Figure 1 This is a partial three-dimensional assembly schematic diagram of the drive axle assembly structure according to an embodiment of the present utility model; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 2 A partial schematic diagram; Figure 4 for Figure 3 A magnified view of part A; Figure 5 for Figure 3 A magnified view of part B. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figures 1 to 5 As shown, this utility model embodiment provides a drive axle assembly structure applied to a port RTG crane, including an axle housing 1, two half-shafts rotatably connected within the axle housing 1, and a reducer 3 connected to the axle housing 1.

[0017] like Figure 1 , Figure 2As shown, a mounting base 11 is formed on the top of the axle housing 1. The mounting base 11 corresponds to the axle sleeve 10 of the axle housing 1, and a mounting surface 111 is formed on its top. The mounting surface 111 is used to mount the frame. By setting this mounting base 11, not only is the installation space reduced, but the entire rotating mechanism can be integrated with the frame so that it can be mounted on the mounting base 11. This simplifies the structure while saving installation space, which is beneficial for the overall layout and reduces costs. In this embodiment, the mounting base 11 is located in the middle of the axle housing 1 and is integrally formed by protruding upward from the top surface of the axle housing 1. A mounting flange 112 is formed on the top of the mounting base 11. The top surface of the mounting flange 112 is the mounting surface 111. The mounting base 11 also has a weight reduction hole 113 located between the top surface of the axle housing 1 and the mounting flange 112. The weight reduction hole 113 passes through the mounting base 11 from front to back. To improve structural strength, a reinforcing plate 2 is formed on each of the two opposite outer side walls (left and right outer side walls) of the mounting base 11 along the radial direction of the semi-axis. The reinforcing plate 2 is located between the top surface of the axle housing 1 and the bottom surface of the mounting flange 112. The reinforcing plate 2 connects to the bottom surface of the mounting flange 112 and the top surface of the axle housing 1 and has a weight-reducing hole 113 that extends through the reinforcing plate 2 from front to back. By providing the aforementioned weight-reducing hole 113, the weight of the drive axle can be reduced.

[0018] like Figure 2 , Figure 3 As shown, the reducer 3 is connected to the front wall of the axle housing 1, and includes a reducer housing 31 fixed to the front wall of the axle housing 1 by bolts, a first reducer 32 disposed within the reducer housing 31, and a second reducer 33 disposed within the axle housing 10. Figure 3 , Figure 5 As shown, in order to further simplify the structure, the reducer housing 31 has two shaft seats 310 formed in its inner cavity, located below the input shaft 321 of the first reducer 32 and distributed in a front-to-back manner. The one located in front of the two shaft seats 310 is the front shaft seat 310, which is integrally formed with the reducer housing 31. The one located in the rear of the two shaft seats 310 is the rear shaft seat 310, which is fixed to the front end face of the reducer housing 31 by screws. Each bearing seat 310 has a lower shaft hole 3101 that runs through it from front to back, and the two lower shaft holes 3101 correspond to each other. The reducing housing 31 also has two upper shaft holes 3111 that are located above the two bearing seats 310 and are distributed vertically within its inner cavity. In order to facilitate processing and installation, in this embodiment, the reducing housing 31 includes a sleeve 311. The sleeve 311 is fixed to the top of the front end of the reducing housing 31 by screws, and its lower end extends into the inner cavity of the reducing housing 31. The inner cavity of the sleeve 311 communicates with the inner cavity of the reducing housing 31 and is provided with the two upper shaft holes 3111. The top of the front end of the reducing housing 31 is provided with an input flange 3215 that is connected to the input shaft 321. Specifically, the upper end of the input shaft 321 extends upward through the sleeve 311 and is connected to the input flange 3215 located above the sleeve 311. The input flange 3215 is set horizontally so that the input flange 3215 does not occupy the longitudinal space of the drive axle and the motor support performance is good.

[0019] like Figure 3 , Figure 4 As shown, specifically, the first reducer 32 includes an input shaft 321 and a transmission shaft 322 rotatably connected within the reducer housing 31. More specifically, the upper end of the input shaft 321 is rotatably engaged with an upper shaft hole 3111 via an upper bearing 3212, and the lower end of the input shaft 321 is rotatably engaged with another upper shaft hole 3111 via a lower bearing 3213. An input gear 3211 is provided at the lower end of the input shaft 321, which is located below the sleeve 311. In this embodiment, the input gear 3211 is located below the lower bearing 3213. A spacer 3214 is also fitted onto the input shaft 321. The upper and lower ends of the spacer 3214 abut against the upper bearing 3212 and the lower bearing 3213 respectively to achieve axial positioning of the upper bearing 3212 and the lower bearing 3213. When it is necessary to adjust the bearing clearance, spacers 3214 of different lengths can be selected according to actual needs, that is, the clearance between the upper and lower bearings can be adjusted by the length of the spacer 3214. The drive shaft 322 is located below the input shaft 321 and its front end is provided with a drive gear 3221 that meshes with the input gear 3211. The drive gear 3221 is integrally formed with the drive shaft 322. The front end of the drive shaft 322 is rotatably engaged with a lower shaft hole 3101 through a bearing 3102, and the rear end of the drive shaft 322 is rotatably engaged with another lower shaft hole 3101 through another bearing 3102. The bearing 3102 located at the front end of the drive shaft 322 is the front bearing, and the bearing 3102 located at the rear end of the drive shaft 322 is the rear bearing. The front bearing and the rear bearing are located in front of and behind the drive gear 3221, respectively.

[0020] like Figure 3 , Figure 4 As shown, an oil passage 3112 is formed on the lower end face of the sleeve 311, located between the lower bearing 3213 and the transmission gear 3221. The oil passage 3112 communicates with the inner cavity of the sleeve 311 and the inner cavity of the housing 31. The oil passage 3112 penetrates the outer peripheral wall of the sleeve 311 for easy machining, and an upper oil port 3113 is formed on the inner peripheral wall and the lower end face of the sleeve 311, respectively, located above the lower bearing 3213 and above the transmission gear 3221. This design of the oil passage 3112 allows lubricating grease to flow from the lower oil port 3114 of the oil passage 3112 into the lower bearing 3213 via the upper oil port 3113 (e.g., ...). Figure 4 The grease flow direction indicated by the middle arrow is used to lubricate the lower bearing 3213 with grease, eliminating the need for oil lubrication via splashing and thus improving the lubrication effect.

[0021] like Figure 1 , Figure 2As shown, the second reducer 33 is located between the two half-shafts and connected to the transmission shaft 322 and the two half-shafts. The second reducer 33 includes a gear assembly (not shown) and an output shaft 331 rotatably connected in the reducer housing 31 and located between the transmission shaft 322 and the gear assembly. The gear assembly is located between the two half-shafts and connected to the two half-shafts. The output shaft 331 is connected to the transmission shaft 322 through a coupling (not labeled) and is provided with an output gear 3311 that meshes with the driven gear of the gear assembly. The output shaft 331 is coaxial with the transmission shaft 322 and both are perpendicular to the half-shafts and the input shaft 321. That is, the output shaft 331, the transmission shaft 322 and the two half-shafts are all horizontally arranged, and the input shaft 321 is vertically arranged.

[0022] like Figure 3 , Figure 5 As shown, to facilitate adjustment of the installation clearance of the front and rear bearings, in this embodiment, an adjusting ring 3103 is threaded into each lower shaft hole 3101. The adjusting ring 3103 is located on the side of the bearing 3102 away from the transmission gear 3221 and abuts against the end face of the bearing 3102. When it is necessary to adjust the installation clearance of the front and rear bearings, the adjusting ring 3103 can be rotated to the required position. The adjusting ring 3103 abuts against the outer ring end face of the bearing 3102, and its end face away from the bearing 3102 is provided with multiple protruding teeth (unlabeled). The multiple protruding teeth are evenly distributed circumferentially along the adjusting ring 3103, and each protruding tooth serves as a rotation angle indicator for the adjusting ring 3103, which facilitates accurate adjustment of the installation clearance of the front and rear bearings.

[0023] The drive axle assembly structure of this utility model has a mounting seat corresponding to the axle housing on the top of the axle housing. The top of the mounting seat has a mounting surface for mounting the vehicle frame. This not only reduces the installation space, but also allows the entire rotating mechanism to be integrated with the vehicle frame so that it can be mounted on the mounting seat. This simplifies the structure while saving installation space, which is beneficial for the overall layout and reduces costs.

[0024] This utility model embodiment also provides a drive axle (such as...) Figure 1 As shown in the figure, it is a drive axle for a port RTG crane, including the drive axle assembly structure described in any of the above embodiments.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drive axle assembly structure, characterized in that, It includes a bridge housing, two half-shafts rotatably connected within the bridge housing, and a reducer connected to the bridge housing; A mounting base is formed on the top of the axle housing, the mounting base corresponds to the axle bundle of the axle housing and a mounting surface is formed on its top, the mounting surface is used to mount the vehicle frame; The reducer is connected to the front sidewall of the axle housing and includes a reducer housing fixed to the front sidewall of the axle housing, a first reducer disposed within the reducer housing, and a second reducer disposed within the axle housing. The first reducer includes an input shaft and a transmission shaft rotatably connected within the reducer housing. The lower end of the input shaft is provided with an input gear, and the transmission shaft is located below the input shaft and is provided with a transmission gear meshing with the input gear. The second reducer is located between the two half-shafts and is connected to the transmission shaft and the two half-shafts.

2. The drive axle assembly structure as described in claim 1, characterized in that, The mounting base is located in the middle of the axle housing and protrudes upward from the top surface of the axle housing. A mounting flange is formed on the top of the mounting base, and the top surface of the mounting flange is the mounting surface. The mounting base also has a weight reduction hole located between the top surface of the axle housing and the mounting flange, and the weight reduction hole extends through the mounting base from front to back.

3. The drive axle assembly structure as described in claim 2, characterized in that, The mounting base forms a reinforcing plate on each of its two opposite outer sidewalls along the radial direction of the half-axis, located between the top surface of the bridge housing and the bottom surface of the mounting flange. The reinforcing plate is connected to the bottom surface of the mounting flange and the top surface of the bridge housing and has a weight-reducing hole, which extends through the reinforcing plate from front to back.

4. The drive axle assembly structure as described in claim 1, characterized in that, The reducing housing has two bearing seats located below the input shaft and distributed front to back within its inner cavity. Each bearing seat has a lower shaft hole that extends through it from front to back. The two lower shaft holes correspond to each other. The front end of the transmission shaft is rotatably engaged with one of the lower shaft holes via a bearing, and the rear end of the transmission shaft is rotatably engaged with the other lower shaft hole via another bearing. An adjusting ring is also threaded into each lower shaft hole. The adjusting ring is located on the side of the bearing away from the transmission gear and abuts against the end face of the bearing.

5. The drive axle assembly structure as described in claim 4, characterized in that, The two bearings are located in front of and behind the transmission gear, respectively. The adjusting ring abuts against the outer ring end face of the bearing, and its end face away from the bearing is provided with a plurality of protruding teeth, which are distributed circumferentially along the adjusting ring.

6. The drive axle assembly structure as described in claim 1, characterized in that, The reducing housing has two upper shaft holes arranged vertically within its inner cavity. The upper end of the input shaft is rotatably engaged with one of the upper shaft holes via an upper bearing, and the lower end of the input shaft is rotatably engaged with the other upper shaft hole via a lower bearing. The input gear is located below the lower bearing. A transmission gear is provided at the front end of the transmission shaft. A spacer is sleeved on the input shaft, and the upper and lower ends of the spacer abut against the upper bearing and the lower bearing, respectively.

7. The drive axle assembly structure as described in claim 6, characterized in that, The reducing housing includes a sleeve, which is fixed to the top of the front end of the reducing housing and its lower end extends into the inner cavity of the reducing housing. The inner cavity of the sleeve is connected to the inner cavity of the reducing housing and is provided with the two upper shaft holes. The input gear is located below the sleeve. An oil passage is opened on the lower end face of the sleeve, located between the lower bearing and the transmission gear. The oil passage is connected to the inner cavity of the sleeve and the inner cavity of the reducing housing.

8. The drive axle assembly structure as described in claim 7, characterized in that, The oil passage penetrates the outer peripheral wall of the sleeve and forms an upper oil port above the lower bearing and a lower oil port above the transmission gear on the inner peripheral wall and lower end face of the sleeve, respectively. The upper end of the input shaft extends upward through the sleeve and is connected to an input flange located above the sleeve. The input flange is horizontally positioned.

9. The drive axle assembly structure as described in claim 1, characterized in that, The second reducer includes a gear assembly and an output shaft rotatably connected within the reducer housing and located between the drive shaft and the gear assembly. The gear assembly is located between and connected to the two half-shafts. The output shaft is connected to the drive shaft and has an output gear that meshes with the driven gear of the gear assembly. The output shaft is coaxial with the drive shaft and both are perpendicular to the half-shafts and the input shaft. The top front end of the reducer housing has an input flange connected to the input shaft.

10. A drive axle, characterized in that, Includes the drive axle assembly structure as described in any one of claims 1 to 9.

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