Multipurpose rear axle split charging device for commercial vehicle

Abstract

The invention relates to the technical field of vehicle engineering, and discloses a commercial vehicle multipurpose rear axle split charging device which comprises a supporting frame, a left supporting platform, a right supporting platform, a Y-direction translation mechanism, two sets of plate spring limiting supporting devices, two sets of rear axle supporting devices and a transmission shaft supporting device. The lower end of the support frame supports the ground; the left supporting platform is fixed to the left side of the upper end face of the supporting frame, the Y-direction translation mechanism is fixed to the right side of the upper end face of the supporting frame, and the right supporting platform is fixed to the Y-direction translation mechanism and can translate left and right in the Y direction relative to the upper end face of the supporting frame. The two plate spring limiting supporting devices are arranged on the upper end faces of the left supporting platform and the right supporting platform in a bilateral symmetry mode. The two rear axle supporting devices are arranged on the middle front portions of the upper end faces of the left supporting platform and the right supporting platform in a bilateral symmetry mode. The transmission shaft supporting device is arranged on the middle-rear portion of the upper end face of the right supporting platform. The split charging requirements of the bridge spring suspension and the air bag bridge suspension can be met at the same time.

Description

Technical Field

[0001] This invention relates to the field of vehicle engineering technology, and in particular to a multi-purpose rear axle assembly device for commercial vehicles. Background Technology

[0002] The axle is a major component of a vehicle's driving system. Commercial vehicles have various types of rear suspensions, including single rear axle leaf spring suspension and air suspension. Each type of suspension requires different assembly methods and devices. For example, the assembly of a single rear axle leaf spring suspension involves connecting the leaf springs to both ends of the axle using U-shaped connectors. When assembling an air suspension, the rear axle needs to be connected to the drive shaft. Currently, these two different suspension types can only be assembled in different locations. Rear axle brakes come in three types: drum brakes, disc brakes, and wedge brakes. The assembly devices for each type of rear axle brake have different structures, and the limited space in the workshop assembly area prevents the storage of multiple sets of assembly devices. Furthermore, the use of tightening machines and leaf spring lifting equipment is restricted, requiring multiple sets of tightening machines and leaf spring lifting equipment to be prepared for each type of device. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a multi-purpose rear axle assembly device for commercial vehicles. By adding, removing, or disassembling components on the device, it can simultaneously meet the assembly requirements of axle spring suspension and airbag axle suspension. Furthermore, the device width can be quickly and accurately adjusted to accommodate rear axle assemblies of different widths. This device also ensures the parallelism of the two leaf springs during leaf spring assembly.

[0004] This invention proposes a multi-purpose rear axle assembly device for commercial vehicles, including a support frame, a left support platform, a right support platform, a Y-axis translation mechanism, two sets of leaf spring limiting support devices, two sets of rear axle support devices, and a drive shaft support device.

[0005] The lower end of the support frame is supported by the ground;

[0006] The left support platform is fixed to the left side of the upper end face of the support frame, the Y-axis translation mechanism is fixed to the right side of the upper end face of the support frame, the right support platform is fixed to the Y-axis translation mechanism, and the right support platform can translate left and right in the Y direction relative to the upper end face of the support frame.

[0007] Two sets of leaf spring limiting support devices are symmetrically arranged on the upper surfaces of the left and right support platforms, respectively.

[0008] Two sets of rear axle support devices are symmetrically arranged on the upper front part of the left and right support platforms, respectively;

[0009] The drive shaft support device is located at the middle and rear of the upper surface of the right support platform.

[0010] The left and right support platforms are symmetrical about opposite axes. The left support platform is a rectangular steel plate with an isosceles trapezoidal rear axle support plane extending horizontally at its inner front end. This rear axle support plane is used to support the rear axle support device on the left side. The right support platform has a drive shaft support plane extending horizontally at a position symmetrical about opposite axes. This drive shaft support plane is designed to provide protective support and limit the drive shaft during the installation of the drive shaft when the airbag axle suspension is assembled, preventing the center of gravity of the assembled airbag axle suspension from shifting and causing overturning.

[0011] The Y-axis translation mechanism includes a servo motor, a ball screw, four slide rails, and four pairs of sliders. The servo motor is fixed to the inner end of the right side of the upper surface of the support frame. The ball screw is fixed to the middle of the upper surface of the support frame via a rotating seat, corresponding to the position of the servo motor. One end of the ball screw is connected to the output shaft of the servo motor. The four slide rails are evenly distributed along the length of the upper surface of the support frame, parallel to the ball screw. Each pair of sliders is fitted onto one slide rail. The upper surface of the ball screw nut and the upper surfaces of the four pairs of sliders are fixed to the lower surface of the right support platform. The ball screw nut and the four pairs of sliders drive the right support platform to translate left and right along the Y-axis of the support frame (the Y-axis is the left-right direction of the support frame).

[0012] Each set of leaf spring limiting support devices includes a pair of leaf spring front curling ear shaft hole positioning push-pull cylinders symmetrically arranged on the left and right, a leaf spring U-shaped connector limiting support device, leaf spring rear curling ear left and right side end limiting devices, and a pair of X-direction slide rails; the pair of leaf spring front curling ear shaft hole positioning push-pull cylinders are respectively fixed to the front front of the upper end of the left support platform or the front front of the upper end of the right support platform, and the front end of the telescopic arm of the pair of leaf spring front curling ear shaft hole positioning push-pull cylinders can be matched and limited to the shaft hole of one leaf spring front curling ear to limit the X-direction (X-direction is the front-back direction of the support frame) displacement of the same leaf spring front curling ear and maintain it. The horizontality of the two leaf springs; the leaf spring U-shaped connector limiting support device and the leaf spring rear curling ear left and right side end limiting device are respectively slidably connected to the middle and rear part of the upper surface of the left support platform or the middle and rear part of the upper surface of the right support platform through a pair of X-direction slide rails. The leaf spring U-shaped connector limiting support device on each side can limit and support the two U-shaped connectors on one side and play a balancing support role for the middle part of the leaf spring. The leaf spring rear curling ear left and right side end limiting device can limit and fix the movement of the leaf spring rear curling ear left and right side ends to prevent the leaf spring from shifting in the Y and Z directions (Z direction is the vertical direction of the support frame).

[0013] The leaf spring U-shaped connector limiting support device includes a U-shaped connector sliding seat, at least one U-shaped connector gasket, and two left and right n-shaped limiting brackets. The U-shaped connector sliding seat is slidably fitted to the front of a pair of X-direction slide rails. At least one U-shaped connector gasket is seated in the middle of the upper end face of the U-shaped connector sliding seat. The two left and right n-shaped limiting brackets are detachably and symmetrically connected to the upper end face of the U-shaped connector sliding seat on the left and right sides of the U-shaped connector gasket. Each n-shaped limiting bracket has an inner groove on the inner surface of its vertical arm to accommodate the U-shaped connector. The n-shaped limiting brackets are detachable so that when the airbag axle suspension is disassembled, the rear axle rotating shaft is seated rearward on two sets of rear axle support devices. When the drive shaft is disassembled with the rear axle, the n-shaped limiting brackets are removed to avoid interference during disassembly and affect disassembly efficiency. The leaf spring rear coil ear left and right side limiting device includes a leaf spring rear coil ear X-direction translation seat, a leaf spring rear coil ear left side limiting device, and a leaf spring rear coil ear left side limiting device. The system includes a side limiting plate, a right-side Y-axis moving limiting plate for the leaf spring rear coil ear, and a leaf spring rear coil ear push-pull cylinder. The leaf spring rear coil ear X-axis sliding seat has an overall H-shaped planar structure, with its left and right ends slidingly fitted to the rear of a pair of X-axis slide rails and fixedly connected by a middle connecting part. The left-side limiting plate for the leaf spring rear coil ear is vertically fixed on the left-side plane of the leaf spring rear coil ear X-axis sliding seat. The leaf spring rear coil ear push-pull cylinder is fixed on the right-side plane of the leaf spring rear coil ear X-axis sliding seat. The outer side of the right-side Y-axis moving limiting plate for the leaf spring rear coil ear is fixedly connected to the front end of the telescopic arm of the leaf spring rear coil ear push-pull cylinder. The telescopic arm of the leaf spring rear coil ear push-pull cylinder can drive the right-side Y-axis moving limiting plate for the leaf spring rear coil ear to approach the left-side limiting plate for the leaf spring rear coil ear. The left-side limiting plate for the leaf spring rear coil ear and the right-side Y-axis moving limiting plate for the leaf spring rear coil ear cooperate to adjust and clamp the Y-axis position according to the width of the placed leaf spring rear coil ear, limiting the Y-axis and Z-axis displacement of the rear end of the leaf spring.

[0014] Each set of leaf spring limiting support devices further includes a fixed limiting seat on the left end face of the leaf spring front curling ear, a sliding limiting seat on the right end face of the leaf spring front curling ear, a pair of sliding limiting seat push-pull cylinders for the leaf spring front curling ear, and a V-shaped support seat for the leaf spring front curling ear. The fixed limiting seat on the left end face of the leaf spring front curling ear on the right support platform is correspondingly set on the right support platform inside the leaf spring front curling ear shaft hole positioning push-pull cylinder on the left side, and the telescopic arm of the leaf spring front curling ear shaft hole positioning push-pull cylinder on the left side is slidably sleeved in the horizontal opening of the fixed limiting seat on the left end face of the leaf spring front curling ear. A pair of sliding limiting seat push-pull cylinders for the leaf spring front curling ear are aligned and set on the right support platform at the front and rear ends of the leaf spring front curling ear shaft hole positioning push-pull cylinder on the right side. The sliding limiting seat on the right end face of the leaf spring front curling ear slides in the Y direction on the right support platform, and the telescopic arm of the leaf spring front curling ear shaft hole positioning push-pull cylinder on the right side is slidably sleeved in the horizontal opening of the sliding limiting seat on the right end face of the leaf spring front curling ear. Inside the hole, the telescopic arms of a pair of leaf spring front curling ear sliding limit seat push-pull cylinders are respectively fixed to the front and rear ends of the right end face sliding limit seat of the leaf spring front curling ear. The pair of leaf spring front curling ear sliding limit seat push-pull cylinders can drive the right end face sliding limit seat of the leaf spring front curling ear to move closer to the left end face fixed limit seat of the leaf spring front curling ear. The cooperation between the left end face fixed limit seat and the right end face sliding limit seat of the leaf spring front curling ear can further clamp and fix the left and right end faces of the leaf spring front curling ear to better maintain the horizontality of the leaf spring. The leaf spring front curling ear V-shaped support seat is set on the right support platform between the left end face fixed limit seat and the right end face sliding limit seat of the leaf spring front curling ear. The function of the leaf spring front curling ear V-shaped support seat is to support the lower end of the leaf spring front curling ear that is balanced front and rear by adjusting the height of its pad, so as to facilitate the subsequent extension of a pair of leaf spring front curling ear shaft hole positioning push-pull cylinders to fit and limit the leaf spring front curling ear shaft hole.

[0015] The left rear axle support device is fixedly connected to the rear axle support plane of the left support platform in front of the left leaf spring U-shaped connector limiting support device. The right rear axle support device is fixed to the symmetrical position of the upper surface of the right support platform. The rear axle support device includes an inverted T-shaped support seat and a fork-shaped rear axle limiting support arm. The fork-shaped rear axle limiting support arm is fixed to the upper surface of the inverted T-shaped support seat. The lower end of the inverted T-shaped support seat is fixed to the upper surface of the left support platform or the upper surface of the right support platform. The two sets of rear axle support devices can provide limiting support for both sides of the rear axle, which facilitates the separate assembly of the axle spring suspension and the air spring axle suspension.

[0016] The fork-shaped rear axle limiting support arm includes a long L-shaped front fixed support arm, an X-axis adjustable short L-shaped rear support arm, and a Z-axis adjusting pad. The lower end face of the long arm of the long L-shaped front fixed support arm is fixed to the upper end face of the inverted T-shaped support base. The Z-axis adjusting pad is detachably fixed to the upper end face of the long arm of the long L-shaped front fixed support arm. The X-axis adjustable short L-shaped rear support arm is detachably fixed along the length of the upper end face of the Z-axis adjusting pad. By increasing or decreasing the height of the Z-axis adjusting pad, the fork-shaped rear axle limiting support arm can be adapted to the front and rear side walls of various rear axles for limiting contact. By adjusting the position of the X-axis adjustable short L-shaped rear support arm in front of and behind the Z-axis adjusting pad, it can be adapted to the front and rear thicknesses of different rear axles for limiting contact. Support reinforcing ribs are provided between the horizontal and vertical planes of the inverted T-shaped support base.

[0017] The drive shaft support device is slidably connected to the drive shaft support plane at the rear of the right support platform via an X-axis slide rail. The drive shaft support device includes a rectangular support frame, a V-shaped slot, and a pair of rotating support rollers. The lower end of the rectangular support frame is slidably connected to the drive shaft support plane at the rear of the right support platform via an X-axis slide rail. The lower end of the V-shaped slot is fixed to the upper surface of the rectangular support frame. The pair of rotating support rollers are symmetrically connected to the left and right sides of the V-shaped slot via an X-axis rotating shaft. The pair of rotating support rollers are adjacent to each other and can contact the drive shaft. Rolling connection; the drive shaft support device is set up so that when the airbag axle suspension is disassembled, the rotating shaft part of the rear axle is seated on two sets of rear axle support devices facing the rear. The drive shaft can be first limited and rolled to the drive shaft support device through one end of the lifting tool, and then the other end of the drive shaft is connected to the rotating shaft of the rear axle through the coupling to complete the disassembly. The drive shaft support device can adjust the center of gravity of the drive shaft support by moving back and forth on the X-axis slide rail according to the length of the drive shaft. A pair of rotating support rollers can facilitate the rapid rolling and positioning of the drive shaft between the two rotating support rollers.

[0018] The long L-shaped front fixed support arm, the X-axis adjustable short L-shaped rear support arm, and the pair of rotating support rollers are all made of polyurethane material, which can prevent bumps, damage, or scratches to the surface of the contacting rear axle or drive shaft.

[0019] Beneficial effects

[0020] This invention, by adding, removing, and disassembling components on the device, can simultaneously meet the assembly requirements of axle spring suspension and airbag axle suspension. It can also quickly and accurately adjust the width of the device to suit rear axle assembly of different widths, and is particularly suitable for leaf spring suspensions with a leaf spring spacing of 989mm and 1035mm, as well as airbag suspensions. This device can ensure the parallelism of the two leaf springs during leaf spring assembly. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the overall structure of the invention. Figure 2 .

[0023] Figure 3 This is a schematic diagram of the Y-axis translation mechanism of the present invention.

[0024] Figure 4 This is a schematic diagram of the overall structure of the invention. Figure 3 .

[0025] Figure 5 This is a front-view three-dimensional structural diagram of the bridge spring suspension assembly of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the bridge spring suspension assembly of the present invention.

[0027] Figure 7 This is a rear-view three-dimensional structural diagram of the airbag bridge suspension assembly of the present invention.

[0028] In the picture:

[0029] 1. Supporting framework;

[0030] 2. Left support platform; 21. Rear axle support plane;

[0031] 3. Right support platform; 31. Drive shaft support plane;

[0032] 4. Y-axis translation mechanism; 41. Servo motor; 42. Ball screw; 43. Slide rail; 44. Slider;

[0033] 5. Leaf spring limiting support device; 51. Leaf spring front curling ear shaft hole positioning push-pull cylinder; 52. Leaf spring U-shaped connector limiting support device; 521. U-shaped connector sliding seat; 522. U-shaped connector gasket; 523. N-shaped limiting frame; 53. Leaf spring rear curling ear left and right side end limiting device; 531. Leaf spring rear curling ear X-direction translation seat; 532. Leaf spring rear curling ear left side limiting plate; 533. Leaf spring rear curling ear right side Y-direction moving limiting plate; 534. Leaf spring rear curling ear push-pull cylinder; 54. X-direction slide rail; 55. Leaf spring front curling ear left end face fixed limiting seat; 56. Leaf spring front curling ear right end face sliding limiting seat; 57. Leaf spring front curling ear sliding limiting seat push-pull cylinder; 58. Leaf spring front curling ear V-shaped support seat;

[0034] 6. Rear axle support device; 61. Inverted T-shaped support seat; 611. Support reinforcing rib; 62. Fork-shaped rear axle limiting support arm; 621. Long L-shaped front fixed support arm; 622. X-direction adjustable short L-shaped rear support arm; 623. Z-direction adjusting pad;

[0035] 7. Drive shaft support device; 71. Rectangular support frame; 72. V-shaped opening groove; 73. Rotating support roller;

[0036] 8. Rear axle;

[0037] 9. Drive shaft. Detailed Implementation

[0038] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0041] Example 1

[0042] See Figures 1-6 As shown, a multi-purpose rear axle assembly device for commercial vehicles includes a support frame 1, a left support platform 2, a right support platform 3, a Y-axis translation mechanism 4, two sets of leaf spring limiting support devices 5, and two sets of rear axle support devices 6.

[0043] The lower end of the support frame 1 is supported by the ground;

[0044] The left support platform 2 is fixed to the left side of the upper end face of the support frame 1, the Y-direction translation mechanism 4 is fixed to the right side of the upper end face of the support frame 1, the right support platform 3 is fixed to the Y-direction translation mechanism 4, and the right support platform 3 can be translated left and right in the Y direction relative to the upper end face of the support frame 1.

[0045] Two sets of leaf spring limiting support devices 5 are symmetrically arranged on the upper surfaces of the left support platform 2 and the right support platform 3, respectively.

[0046] Two sets of rear axle support devices 6 are symmetrically arranged on the left and right sides of the upper front part of the left support platform 2 and the right support platform 3, respectively.

[0047] The left support platform 2 and the right support platform 3 are symmetrical about opposite axes. The left support platform 2 is a rectangular steel plate with an isosceles trapezoidal rear axle support plane 21 extending horizontally at the front of its inner end. The right support platform 3 has a drive shaft support plane 31 extending horizontally at a position symmetrical about opposite axes. The drive shaft support plane 31 is designed to provide protective support and limit the drive shaft during the installation of the drive shaft when the airbag axle suspension is assembled, preventing the center of gravity of the assembled airbag axle suspension from shifting and causing overturning.

[0048] The Y-axis translation mechanism 4 includes a servo motor 41, a ball screw 42, four slide rails 43, and four pairs of sliders 44. The servo motor 41 is fixed to the inner end of the right side of the upper surface of the support frame 1. The ball screw 42 is fixed to the middle of the upper surface of the support frame 1 via a rotating seat, corresponding to the position of the servo motor. One end of the ball screw 42 is connected to the output shaft of the servo motor 41. The four slide rails 43 are evenly distributed along the length of the upper surface of the support frame 1, parallel to the ball screw 42. Each pair of sliders 44 is correspondingly fitted onto one slide rail 43. The upper surface of the ball screw nut of the ball screw 42 and the upper surfaces of the four pairs of sliders 44 are fixed to the lower surface of the right support platform 3.

[0049] Each set of leaf spring limiting support devices 5 includes a pair of leaf spring front curling ear shaft hole positioning push-pull cylinders 51 symmetrically arranged on the left and right, a leaf spring U-shaped connector limiting support device 52, a leaf spring rear curling ear left and right side end limiting device 53, and a pair of X-direction slide rails 54; the pair of leaf spring front curling ear shaft hole positioning push-pull cylinders 51 are respectively fixed to the front front of the upper end of the left support platform 2 or the front front of the upper end of the right support platform 3, and the front end of the telescopic arm of the pair of leaf spring front curling ear shaft hole positioning push-pull cylinders 51 can be matched and limited to the shaft hole of a leaf spring front curling ear; the leaf spring U-shaped connector limiting support device 52 and the leaf spring rear curling ear left and right side end limiting device 53 are respectively slidably connected to the middle and rear part of the upper end of the left support platform 2 or the middle and rear part of the upper end of the right support platform 3 through a pair of X-direction slide rails 54.

[0050] The leaf spring U-shaped connector limiting support device 52 includes a U-shaped connector sliding seat 521, at least one U-shaped connector gasket 522, and two left and right n-shaped limiting brackets 523. The U-shaped connector sliding seat 521 is slidably fitted to the front of a pair of X-direction slide rails 54. At least one U-shaped connector gasket 522 is seated on the middle of the upper end face of the U-shaped connector sliding seat 521. The two left and right n-shaped limiting brackets 523 are detachably and symmetrically connected to the upper end face of the U-shaped connector sliding seat 521 on the left and right sides of the U-shaped connector gasket 522. Each n-shaped limiting bracket 523 has an inner groove on the inner surface of its vertical arm to accommodate the U-shaped connector. The leaf spring rear coil ear left and right side limiting device 53 includes a leaf spring rear coil ear X-direction translation seat 531 and a leaf spring rear coil ear left side limiting plate 53. 2. Right side Y-direction moving limit plate 533 of leaf spring rear curling ear, leaf spring rear curling ear push-pull cylinder 534; The leaf spring rear curling ear X-direction sliding seat 531 has an overall H-shaped planar structure, with its left and right ends respectively slidingly fitted to the rear of a pair of X-direction slide rails 54 and fixedly connected by the middle connecting part. The left side limit plate 532 of leaf spring rear curling ear is vertically fixed on the left side plane of leaf spring rear curling ear X-direction sliding seat 531. The leaf spring rear curling ear push-pull cylinder 534 is fixed on the right side plane of leaf spring rear curling ear X-direction sliding seat 531. The outer side of the right side Y-direction moving limit plate 533 of leaf spring rear curling ear is fixedly connected to the front end of the telescopic arm of leaf spring rear curling ear push-pull cylinder 534. The telescopic arm of leaf spring rear curling ear push-pull cylinder 534 can drive the right side Y-direction moving limit plate 533 of leaf spring rear curling ear to move closer to the left side limit plate 532 of leaf spring rear curling ear.

[0051] Each set of leaf spring limiting support devices 5 also includes a fixed limiting seat 55 on the left end face of the leaf spring front curling ear, a sliding limiting seat 56 on the right end face of the leaf spring front curling ear, a pair of leaf spring front curling ear sliding limiting seat push-pull cylinders 57, and a leaf spring front curling ear V-shaped support seat 58; the fixed limiting seat 55 on the left end face of the leaf spring front curling ear on the right support platform 3 is correspondingly set on the right support platform 3 inside the leaf spring front curling ear shaft hole positioning push-pull cylinder 51 on the left, and the telescopic arm of the leaf spring front curling ear shaft hole positioning push-pull cylinder 51 on the left slides into the horizontal opening of the fixed limiting seat 55 on the left end face of the leaf spring front curling ear; a pair of leaf spring front curling ear sliding limiting seat push-pull cylinders 57 are aligned and set on the right support platform 3 at the front and rear ends of the leaf spring front curling ear shaft hole positioning push-pull cylinder 51 on the right. The right end face sliding limit seat 56 of the leaf spring front curling ear slides in the Y direction on the right support platform 3. The telescopic arm of the right side leaf spring front curling ear shaft hole positioning push-pull cylinder 51 is slidably sleeved in the horizontal through hole of the right end face sliding limit seat 56 of the leaf spring front curling ear. The telescopic arms of a pair of leaf spring front curling ear sliding limit seat push-pull cylinders 57 are respectively fixed to the front and rear ends of the right end face sliding limit seat 56 of the leaf spring front curling ear. The pair of leaf spring front curling ear sliding limit seat push-pull cylinders 57 can drive the right end face sliding limit seat 56 of the leaf spring front curling ear to move closer to the left end face fixed limit seat 55 of the leaf spring front curling ear. The leaf spring front curling ear V-shaped support seat 58 is seated on the right support platform 3 between the left end face fixed limit seat 55 of the leaf spring front curling ear and the right end face sliding limit seat 56 of the leaf spring front curling ear.

[0052] The left rear axle support device 6 is fixedly connected to the rear axle support plane 21 of the left support platform 2 in front of the left leaf spring U-shaped connector limiting support device 52. The right rear axle support device 6 is fixed to the symmetrical position of the upper end face of the right support platform 3. The rear axle support device 6 includes an inverted T-shaped support seat 61 and a fork-shaped rear axle limiting support arm 62. The fork-shaped rear axle limiting support arm 62 is fixed to the upper end face of the inverted T-shaped support seat 61. The lower end of the inverted T-shaped support seat 61 is fixed to the upper end face of the left support platform 2 or the upper end face of the right support platform 3. The two sets of rear axle support devices 6 can provide limiting support for both sides of the rear axle 8, which facilitates the separate assembly of the axle spring suspension and the airbag axle suspension.

[0053] The fork-shaped rear axle limiting support arm 62 includes a long L-shaped front fixed support arm 621, an X-direction adjustable short L-shaped rear support arm 622, and a Z-direction adjusting pad 623. The lower end face of the long arm of the long L-shaped front fixed support arm 621 is fixed to the upper end face of the inverted T-shaped support base 61. The Z-direction adjusting pad 623 is detachably fixed to the upper end face of the long arm of the long L-shaped front fixed support arm 621. The X-direction adjustable short L-shaped rear support arm 622 is detachably fixed in the length direction of the upper end face of the Z-direction adjusting pad 623. By increasing or decreasing the height of the Z-direction adjusting pad 623, the fork-shaped rear axle limiting support arm 62 can be adapted to the front and rear side walls of various rear axles 8 for limiting contact. By adjusting the position of the X-direction adjustable short L-shaped rear support arm 622 in front and behind the Z-direction adjusting pad 623, it can be adapted to the front and rear thicknesses of different rear axles 8 for limiting contact. A supporting reinforcing rib 611 is provided between the horizontal and vertical planes of the inverted T-shaped support base 61.

[0054] The long L-shaped front fixed support arm 621 and the X-direction adjustable short L-shaped rear support arm 622 are both made of polyurethane.

[0055] Example 2

[0056] See Figures 1-4 and Figure 7 As shown, a commercial vehicle multi-purpose rear axle assembly device, which differs from Embodiment 1 in that it also includes a drive shaft support device 7.

[0057] The drive shaft support device 7 is located at the middle and rear part of the upper end face of the right support platform 3.

[0058] The two left and right n-shaped limiting brackets 523 of the leaf spring U-shaped connector limiting support device 52 are removed. The n-shaped limiting brackets 523 are removed so that when the airbag axle suspension is disassembled, the rear axle 8 rotating shaft part sits on the two sets of rear axle support devices 6. When the drive shaft 9 is disassembled with the rear axle 8, the n-shaped limiting brackets 523 are removed to avoid disassembly interference and affect disassembly efficiency.

[0059] The drive shaft support device 7 is slidably connected to the drive shaft support plane 31 at the rear of the right support platform 3 via an X-axis slide rail. The drive shaft support device 7 includes a rectangular support frame 71, a V-shaped opening groove 72, and a pair of rotating support rollers 73. The lower end of the rectangular support frame 71 is slidably connected to the drive shaft support plane 31 at the rear of the right support platform 3 via an X-axis slide rail. The lower end of the V-shaped opening groove 72 is fixed to the upper surface of the rectangular support frame 71. The pair of rotating support rollers 73 are symmetrically connected to the left and right sides of the V-shaped opening groove 72 via an X-axis rotating shaft. The drive shaft can be rolled and connected to the drive shaft. The drive shaft support device 7 is set up so that when the airbag axle suspension is disassembled, the rotating shaft part of the rear axle 8 is seated on the two sets of rear axle support devices 6 facing the rear. The drive shaft 9 can be first limited and rolled to the drive shaft support device 7 through one end of the lifting tool. Then the other end of the drive shaft 9 is connected to the rotating shaft of the rear axle 8 through the coupling to complete the disassembly. The drive shaft support device 7 can adjust the center of gravity of the drive shaft support by moving back and forth on the X-direction slide rail according to the length of the drive shaft. A pair of rotating support rollers 73 can facilitate the rapid rolling and positioning of the drive shaft between the two rotating support rollers 73.

[0060] Both of the rotating support rollers 73 are made of polyurethane.

[0061] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A multi-purpose rear axle assembly device for commercial vehicles, characterized in that: It includes a support frame (1), a left support platform (2), a right support platform (3), a Y-axis translation mechanism (4), two sets of leaf spring limiting support devices (5), two sets of rear axle support devices (6), and a drive shaft support device (7). The lower end of the support frame (1) is supported by the ground; The left support platform (2) is fixed to the left side of the upper end face of the support frame (1), the Y-direction translation mechanism (4) is fixed to the right side of the upper end face of the support frame (1), the right support platform (3) is fixed on the Y-direction translation mechanism (4), and the right support platform (3) can be translated left and right in the Y direction relative to the upper end face of the support frame (1); Two sets of leaf spring limiting support devices (5) are symmetrically arranged on the upper surfaces of the left support platform (2) and the right support platform (3), respectively; Two sets of rear axle support devices (6) are symmetrically arranged on the front part of the upper end face of the left support platform (2) and the right support platform (3), respectively; The drive shaft support device (7) is located at the rear middle part of the upper end face of the right support platform (3).

2. The commercial vehicle multi-purpose rear axle assembly device according to claim 1, characterized in that: The left support platform (2) and the right support platform (3) are axially symmetrical in opposite directions. The left support platform (2) is a rectangular steel plate with an isosceles trapezoidal rear axle support plane (21) extending horizontally at the front of its inner end. The right support platform (3) has a drive shaft support plane (31) extending horizontally at the axially symmetrical position of the rectangular steel plate.

3. The commercial vehicle multi-purpose rear axle assembly device according to claim 2, characterized in that: The Y-axis translation mechanism (4) includes a servo motor (41), a ball screw (42), four slide rails (43), and four pairs of sliders (44). The servo motor (41) is fixed to the inner end of the right side of the upper end face of the support frame (1). The ball screw (42) is fixed to the middle of the upper end face of the support frame (1) through a rotating seat corresponding to the position of the servo motor. One end of the ball screw (42) is connected to the output shaft of the servo motor (41). The four slide rails (43) are evenly distributed along the length of the upper end face of the support frame (1) parallel to the ball screw (42). Each pair of sliders (44) is fitted onto a slide rail (43). The upper end face of the ball screw nut of the ball screw (42) and the upper end face of the four pairs of sliders (44) are fixed to the lower end face of the right support platform (3).

4. The commercial vehicle multi-purpose rear axle assembly device according to claim 3, characterized in that: Each set of leaf spring limiting support devices (5) includes a pair of leaf spring front curling ear shaft hole positioning push-pull cylinders (51) symmetrically arranged on the left and right, leaf spring U-shaped connector limiting support device (52), leaf spring rear curling ear left and right side end limiting device (53), and a pair of X-direction slide rails (54); the pair of leaf spring front curling ear shaft hole positioning push-pull cylinders (51) are respectively fixed to the front front of the upper end of the left support platform (2) or the front front of the upper end of the right support platform (3), and the front end of the telescopic arm of the pair of leaf spring front curling ear shaft hole positioning push-pull cylinders (51) can be matched and limited to the shaft hole of a leaf spring front curling ear; the leaf spring U-shaped connector limiting support device (52) and the leaf spring rear curling ear left and right side end limiting device (53) are respectively slidably connected to the middle and rear part of the upper end of the left support platform (2) or the middle and rear part of the upper end of the right support platform (3) through a pair of X-direction slide rails (54).

5. A commercial vehicle multi-purpose rear axle assembly device according to claim 4, characterized in that: The leaf spring U-shaped connector limiting support device (52) includes a U-shaped connector sliding seat (521), at least one U-shaped connector pad (522), and two left and right n-shaped limiting brackets (523); the U-shaped connector sliding seat (521) is slidably fitted to the front of a pair of X-direction slide rails (54), at least one U-shaped connector pad (522) is seated on the middle of the upper end face of the U-shaped connector sliding seat (521), and the two left and right n-shaped limiting brackets (523) are detachably and symmetrically connected to the upper end face of the U-shaped connector sliding seat (521) on the left and right sides of the U-shaped connector pad (522), and each n-shaped limiting bracket (523) has an inner groove on the inner surface of its vertical arm; the leaf spring rear coil ear left and right side limiting device (53) includes a leaf spring rear coil ear X-direction translation seat (531), a leaf spring rear coil ear left side limiting plate (532), and a leaf spring rear coil ear right side limiting device (533). The leaf spring rear curling ear push-pull cylinder (534) is a side Y-direction moving limit plate (533). The leaf spring rear curling ear X-direction translating seat (531) is an H-shaped planar structure. Its left and right ends are respectively slidably fitted to the rear of a pair of X-direction slide rails (54) and fixedly connected by the middle connecting part. The leaf spring rear curling ear left side limit plate (532) is vertically fixed on the left side plane of the leaf spring rear curling ear X-direction translating seat (531). The leaf spring rear curling ear push-pull cylinder (534) is fixed on the right side plane of the leaf spring rear curling ear X-direction translating seat (531). The outer side of the leaf spring rear curling ear right side Y-direction moving limit plate (533) is fixedly connected to the front end of the telescopic arm of the leaf spring rear curling ear push-pull cylinder (534). The telescopic arm of the leaf spring rear curling ear push-pull cylinder (534) can drive the leaf spring rear curling ear right side Y-direction moving limit plate (533) to approach the leaf spring rear curling ear left side limit plate (532).

6. A commercial vehicle multi-purpose rear axle assembly device according to claim 5, characterized in that: Each set of leaf spring limiting support devices (5) further includes a fixed limiting seat (55) on the left end face of the leaf spring front curling ear, a sliding limiting seat (56) on the right end face of the leaf spring front curling ear, a pair of leaf spring front curling ear sliding limiting seat push-pull cylinders (57), and a leaf spring front curling ear V-shaped support seat (58); the fixed limiting seat (55) on the left end face of the leaf spring front curling ear on the right support platform (3) is correspondingly set on the right support platform (3) inside the leaf spring front curling ear shaft hole positioning push-pull cylinder (51) on the left side, and the telescopic arm of the leaf spring front curling ear shaft hole positioning push-pull cylinder (51) on the left side is slidably sleeved in the horizontal opening of the fixed limiting seat (55) on the left end face of the leaf spring front curling ear; a pair of leaf spring front curling ear sliding limiting seat push-pull cylinders (57) are aligned and set on the right support platform (3) at the front and rear ends of the leaf spring front curling ear shaft hole positioning push-pull cylinder (51) on the right side. Above, the right end face sliding limit seat (56) of the leaf spring front curling ear slides in the Y direction on the right support platform (3). The telescopic arm of the right leaf spring front curling ear shaft hole positioning push-pull cylinder (51) slides in the horizontal through hole of the right end face sliding limit seat (56) of the leaf spring front curling ear. The telescopic arms of a pair of leaf spring front curling ear sliding limit seat push-pull cylinders (57) are respectively fixed to the front and rear ends of the right end face sliding limit seat (56) of the leaf spring front curling ear. A pair of leaf spring front curling ear sliding limit seat push-pull cylinders (57) can drive the right end face sliding limit seat (56) of the leaf spring front curling ear to move closer to the left end face fixed limit seat (55) of the leaf spring front curling ear. The leaf spring front curling ear V-shaped support seat (58) is seated on the right support platform (3) between the left end face fixed limit seat (55) of the leaf spring front curling ear and the right end face sliding limit seat (56) of the leaf spring front curling ear.

7. A commercial vehicle multi-purpose rear axle assembly device according to claim 6, characterized in that: The left rear axle support device (6) is fixedly connected to the rear axle support plane (21) of the left support platform (2) in front of the left leaf spring U-shaped connector limiting support device (52). The right rear axle support device (6) is fixed to the symmetrical position of the upper end face of the right support platform (3). The rear axle support device (6) includes an inverted T-shaped support seat (61) and a fork-shaped rear axle limiting support arm (62). The fork-shaped rear axle limiting support arm (62) is fixed to the upper end face of the inverted T-shaped support seat (61). The lower end of the inverted T-shaped support seat (61) is fixed to the upper end face of the left support platform (2) or the upper end face of the right support platform (3).

8. A commercial vehicle multi-purpose rear axle assembly device according to claim 7, characterized in that: The fork-shaped rear axle limiting support arm (62) includes a long L-shaped front fixed support arm (621), an X-direction adjustable short L-shaped rear support arm (622), and a Z-direction adjusting pad (623). The lower end face of the long arm of the long L-shaped front fixed support arm (621) is fixed to the upper end face of the inverted T-shaped support seat (61). The Z-direction adjusting pad (623) is detachably fixed to the upper end face of the long arm of the long L-shaped front fixed support arm (621). The X-direction adjustable short L-shaped rear support arm (622) is detachably fixed in the length direction of the upper end face of the Z-direction adjusting pad (623). A supporting reinforcing rib (611) is provided between the horizontal and vertical planes of the inverted T-shaped support seat (61).

9. A multi-purpose rear axle assembly device for commercial vehicles according to claim 8, characterized in that: The drive shaft support device (7) is slidably connected to the drive shaft support plane (31) at the rear of the right support platform (3) via an X-direction slide rail; the drive shaft support device (7) includes a rectangular support frame (71), a V-shaped opening groove (72), and a pair of rotating support rollers (73); the lower end of the rectangular support frame (71) is slidably connected to the drive shaft support plane (31) at the rear of the right support platform (3) via an X-direction slide rail, the lower end of the V-shaped opening groove (72) is fixed to the upper end face of the rectangular support frame (71), and a pair of rotating support rollers (73) are symmetrically rotated and connected to the left and right sides of the V-shaped opening groove (72) via an X-direction rotating shaft, and the pair of rotating support rollers (73) are adjacent to each other and can be rolled and connected to the drive shaft.

10. A multi-purpose rear axle assembly device for commercial vehicles according to claim 9, characterized in that: The long L-shaped front fixed support arm (621), the X-direction adjustable short L-shaped rear support arm (622), and the pair of rotating support rollers (73) are all made of polyurethane.

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