Tricycle tailor-welded full-floating rear axle with circular-section oil brakes

Abstract

The invention discloses a tricycle tailor-welded full-floating rear axle with a circular-section oil brake, which belongs to the technical field of vehicle rear axles and comprises an integrally welded axle housing, a bearing sleeve, a brake drum, a half axle and a main reducer assembly. The brake drum is fixedly assembled on the bearing sleeves, the bearing sleeves are rotationally connected with the two ends of the integrally-welded axle housing through bearings, the main reducer assembly is fixedly installed on the front side of the integrally-welded axle housing, and one end of the half shaft is fixedly connected with the bearing sleeves at the two ends through bolts. The other end of the half shaft is in transmission connection with the main reducer assembly through an involute spline; a right brake is installed in the brake drum arranged on the right side of the integrally-welded axle housing, and a left brake is installed in the brake drum arranged on the left side of the integrally-welded axle housing. The processing procedure is simplified, the production cost is reduced, the product strength, rigidity and operation stability are improved, the fault risks such as oil leakage and cracking are reduced, and meanwhile the use safety is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle rear axle, and particularly relates to a three-wheeled vehicle welded round-section oil brake full-floating rear axle. BACKGROUND

[0002] The traditional three-wheeled vehicle rear axle shell assembly uses a separate middle section and a steel pipe welding form, and the machining process is complex, and multiple processes such as middle section machining, steel pipe cutting, middle section and steel pipe welding, and subsequent straightening need to be completed in sequence, resulting in low production efficiency. In addition, coaxiality error is prone to occur during welding, affecting the running stability of the rear axle, and additional investment in straightening process cost is required, further increasing the processing cost. Moreover, the material quality and thickness of the middle section of the axle shell and the round pipe are different, stress concentration is easy to form at the connection, and defects are prone to occur in the welding seam, resulting in the risk of oil leakage and cracking of the rear axle during long-term use, and the product scrap rate is high. The traditional square tube rear axle is matched with a square U-shaped bolt, and the bolt corner is prone to fracture due to stress concentration, causing safety accidents. SUMMARY

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present application provides a three-wheeled vehicle welded round-section oil brake full-floating rear axle, which simplifies the machining process, reduces the production cost, improves the product strength, rigidity and running stability, reduces the risk of oil leakage, cracking and other faults, and improves the safety in use.

[0004] The technical scheme adopted by the present application is as follows: a three-wheeled vehicle welded round-section oil brake full-floating rear axle, comprising an integrally welded axle shell, a bearing sleeve, a brake drum, a half shaft and a main reduction assembly; the brake drum is fixedly assembled on the bearing sleeve, the bearing sleeve is rotatably connected to the two ends of the integrally welded axle shell through bearings, the main reduction assembly is fixedly installed on the front side of the integrally welded axle shell, one end of the half shaft is fixedly connected to the bearing sleeves at both ends through bolts, and the other end of the half shaft is drivingly connected to the main reduction assembly through a involute spline; a right brake is installed in the right brake drum arranged on the right side of the integrally welded axle shell, and a left brake is installed in the left brake drum arranged on the left side of the integrally welded axle shell.

[0005] Among them, the right brake is connected with a right brake hard pipe, the left brake is connected with a left brake hard pipe, a three-way joint is fixedly assembled on the integrally welded axle shell, the left side of the right brake hard pipe is communicated with the three-way joint, and the right side is communicated with the right brake; the left side of the left brake hard pipe is communicated with the left brake, and the right side is communicated with the three-way joint.

[0006] Among them, a reinforcing ring is welded at the middle part of the integrally welded axle shell, the main reduction assembly is fixedly installed on the front side of the integrally welded axle shell through the reinforcing ring, a rear cover is welded at the rear end of the integrally welded axle shell, and flanges are welded at both ends of the integrally welded axle shell.

[0007] The integral welded bridge shell comprises an upper bridge shell and a lower bridge shell, and the upper bridge shell and the lower bridge shell are connected by spot welding after being stamped and formed.

[0008] The plate spring seat is fixedly assembled on the upper bridge shell.

[0009] The air permeable plug is connected with the upper bridge shell in a threaded connection mode.

[0010] The oiling bolt is arranged on the rear cover, and the oil draining bolt is arranged on the bottom wall of the lower bridge shell.

[0011] The integral welded bridge shell is made of high-strength steel plate by integral stamping and forming and spot welding, and has a circular cross-section structure.

[0012] The large circular arc transition design is adopted from the circular pipe to the middle part of the integral welded bridge shell, and a circular arc transition U-shaped bolt is used in cooperation, the U-shaped bolt is matched with the integral welded bridge shell with a circular cross-section, and stress uniform distribution is realized.

[0013] After the above structure is adopted, the present application has the following beneficial effects: the rear bridge shell of the present application is made of high-strength steel plate by integral stamping and forming, the traditional middle section of the rear bridge is cancelled, the welding process and the straightening process of the middle section are reduced, the strength and rigidity are better than those of the traditional process rear bridge under the same wall thickness, the labor cost and the material cost are reduced, the bridge shell bears more and has stronger bending fatigue resistance; the material and thickness of the traditional rear bridge middle section and the circular pipe are different, the present application and the traditional rear bridge are made of steel plate by integral stamping and forming, the concentricity and the coaxiality are good, the straightening process is not needed, the overall material thickness of the rear bridge shell is uniform, the risk of cracking defects caused by stress concentration of the middle section and the circular pipe is reduced, the material cost can be effectively reduced; only the reinforcing ring and the rear cover of the bridge shell need to be welded on both sides of the middle part, the flanges are welded on both ends of the rear bridge shell, and all other parts can be borrowed, so that the generalization demand is met; the square U-shaped bolt is used for installing the traditional square tube rear bridge, the corners of the U-shaped bolt are prone to fracture due to stress concentration after long-term use, which causes accidents, the present application uses a circular pipe shape and a circular arc transition U-shaped bolt, and the stress is relatively uniform, so there is no stress concentration after long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments, and explain the present application, and do not constitute a limitation on the present application.

[0015] Figure 1 The structure diagram of the three-wheeled vehicle spot-welded circular cross-section oil brake full-floating rear bridge is provided. Figure 2 The rear view of the three-wheeled vehicle spot-welded circular cross-section oil brake full-floating rear bridge is provided. Figure 3This is a partial top view of the welded circular cross-section hydraulic brake fully floating rear axle for tricycles proposed in this invention; Figure 4 This is a partial structural diagram of the welded circular cross-section hydraulic brake fully floating rear axle for three-wheeled vehicles proposed in this invention. Figure 1 ; Figure 5 This is a partial structural diagram of the welded circular cross-section hydraulic brake fully floating rear axle for three-wheeled vehicles proposed in this invention. Figure 2 ; Figure 6 This is a schematic diagram of the upper bridge shell structure proposed in this invention; Figure 7 This is a schematic diagram of the structure of the lower bridge housing proposed in this invention.

[0016] In the attached diagram: 1. Half shaft, 2. Bearing sleeve, 3. Brake drum, 4. Integrated welded axle housing, 5. Main reduction assembly, 6. Breather plug, 7. Right brake, 8. Right brake hard pipe, 9. Oil filler bolt, 10. Drain bolt, 11. T-joint, 12. Left brake hard pipe, 13. Left brake, 14. Flange, 15. Leaf spring seat, 17. Upper axle housing, 18. Lower axle housing, 19. Reinforcing ring, 20. Rear cover. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0019] like Figures 1-7As shown, the three-wheeled welding round section oil brake full-floating rear axle, including an integral welding axle housing 4, bearing sleeve 2, brake drum 3, half shaft 1 and main reduction assembly 5; the brake drum 3 is fixedly assembled on the bearing sleeve 2, the bearing sleeve 2 is rotatably connected with the integral welding axle housing 4 through the bearing, the main reduction assembly 5 is fixedly installed on the front side of the integral welding axle housing 4, one end of the half shaft 1 is fixedly connected with the bearing sleeve 2 at both ends through bolts, the other end of the half shaft 1 is drivingly connected with the main reduction assembly 5 through the involute spline, the right brake drum 3 provided on the right side of the integral welding axle housing 4 is provided with a right brake 7, and the left brake drum 3 provided on the left side of the integral welding axle housing 4 is provided with a left brake 13.

[0020] The right brake 7 is connected with a right brake hard pipe 8, the left brake 13 is connected with a left brake hard pipe 12, a three-way joint 11 is fixedly assembled on the integral welding axle housing 4, the left side of the right brake hard pipe 8 is communicated with the three-way joint 11, and the right side is communicated with the right brake 7; the left side of the left brake hard pipe 12 is communicated with the left brake 13, and the right side is communicated with the three-way joint 11.

[0021] The middle part of the integral welding axle housing 4 is welded with a reinforcing ring 19, the main reduction assembly 5 is fixedly installed on the front side of the integral welding axle housing 4 through the reinforcing ring 19, the rear end of the integral welding axle housing 4 is welded with a rear cover 20, and the both ends of the integral welding axle housing 4 are welded with flanges 14.

[0022] The integral welding axle housing 4 includes an upper axle housing 17 and a lower axle housing 18, and the upper axle housing 17 and the lower axle housing 18 are connected by stamping and welding after stamping and forming.

[0023] Plate spring seats 15 are installed at both ends of the upper axle housing 17, and the plate spring seats 15 are fixedly assembled on the upper axle housing 17.

[0024] An air vent plug 6 is installed on the upper axle housing 17, and the air vent plug 6 is connected with the upper axle housing 17 in a threaded connection mode.

[0025] A refueling bolt 9 is installed on the rear cover 20, and a drain bolt 10 is installed on the bottom wall of the lower axle housing 18.

[0026] The integral welding axle housing 4 is made of high-strength steel plate by integral stamping and forming and then welding, and has a circular cross-section structure.

[0027] The circular tube to the middle part of the integral welding axle housing 4 adopts a large circular arc transition design, and is matched with a circular arc transition U-shaped bolt, the U-shaped bolt is matched with the integral welding axle housing 4 with a circular cross-section, and stress is uniformly distributed.

[0028] The integrally welded axle housing 4 cancels the separate middle section structure of the traditional rear axle, and only forms the complete axle housing structure through the tailor-welding of the upper axle housing 17, the lower axle housing 18 and the reinforcing ring 19 and the rear cover 20; after the power is input to the main reduction assembly 5, the half shaft 1 is driven to rotate through the spline, and then the bearing sleeve 2 and the brake drum 3 are synchronously rotated to realize the forward and reverse functions of the vehicle.

[0029] The specific use is as follows: (I) power transmission operation After the vehicle is started, the motor power is input to the main reduction assembly 5; the main reduction assembly 5 drives the half shaft 1 to rotate through the spline; the half shaft 1 drives the bearing sleeve 2 at both ends and the brake drum 3 fixed on the bearing sleeve 2 to synchronously rotate, and then drives the vehicle to realize the forward or reverse function; during driving, the integrally welded axle housing 4 bears the weight of the vehicle and the driving impact force through the circular cross-section structure and the large circular arc transition design, and the tailor-welded structure of the reinforcing ring 19 and the upper and lower axle housings 18 ensures the overall rigidity and guarantees the driving stability.

[0030] (II) brake operation When the vehicle needs to be decelerated or stopped, the brake pedal is pressed, the brake system pressure is transmitted to the left and right brake hard pipes 8 through the three-way joint 11; the left and right brake hard pipes 8 transmit the pressure to the corresponding left brake 13 and right brake 7 respectively; the brake acts and cooperates with the brake drum 3 to generate a brake friction force, so that the brake drum 3 stops rotating, and then the vehicle braking is realized; after the brake pedal is released, the brake is reset, the brake drum 3 resumes free rotation, and the vehicle normally drives.

[0031] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents. In general, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, similar structural modes and embodiments are not creatively designed without departing from the purpose of the present application, which should belong to the protection scope of the present application.

Claims

1. A welded circular cross-section hydraulic brake fully floating rear axle for a tricycle, characterized in that: The system includes an integrally welded bridge housing, bearing sleeves, a brake drum, a half-shaft, and a main reduction assembly. The brake drum is fixedly mounted on the bearing sleeve, which is rotatably connected to both ends of the integrally welded bridge housing via bearings. The main reduction assembly is fixedly installed on the front side of the integrally welded bridge housing. One end of the half-shaft is fixedly connected to the bearing sleeves at both ends via bolts, and the other end of the half-shaft is drivenly connected to the main reduction assembly via an involute spline. A right brake is installed in the brake drum located on the right side of the integrally welded bridge housing, and a left brake is installed in the brake drum located on the left side of the integrally welded bridge housing.

2. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 1, characterized in that, The right brake is connected to a right brake hard tube, the left brake is connected to a left brake hard tube, and a three-way connector is fixedly mounted on the integral welded axle housing. The left side of the right brake hard tube is connected to the three-way connector, and the right side is connected to the right brake; the left side of the left brake hard tube is connected to the left brake, and the right side is connected to the three-way connector.

3. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 1, characterized in that, A reinforcing ring is welded to the middle part of the integrated welded bridge housing. The main reduction assembly is fixedly installed on the front side of the integrated welded bridge housing through the reinforcing ring. A rear cover is welded to the rear end of the integrated welded bridge housing. Flanges are welded to both ends of the integrated welded bridge housing.

4. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 3, characterized in that, The integral welded bridge housing includes an upper bridge housing and a lower bridge housing, which are stamped and then welded together.

5. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 4, characterized in that, Leaf spring seats are installed at both ends of the upper bridge housing, and the leaf spring seats are fixedly assembled on the upper bridge housing.

6. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 4, characterized in that, A vent plug is installed on the upper bridge housing, and the vent plug is connected to the upper bridge housing by a threaded connection.

7. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 4, characterized in that, An oiling bolt is installed on the rear cover, and an oil drain bolt is installed on the bottom wall of the lower axle housing.

8. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 1, characterized in that, The integrated welded bridge shell is made of high-strength steel plate, which is stamped and welded together, and has a circular cross-section structure.

9. The three-wheeled vehicle welded circular cross-section hydraulic brake fully floating rear axle according to claim 1, characterized in that, The integral welded bridge housing adopts a large arc transition design from the circular tube to the middle part, and is equipped with arc transition U-bolts. The U-bolts are compatible with the integral welded bridge housing with a circular cross section.

Images