Liquid expansion forming integrated rear axle shell of tricycle

Abstract

The utility model discloses a tricycle liquid expansion molding integrated rear axle housing, which comprises an integrated axle housing, the integrated axle housing comprises an axle bag and axle tubes integrally connected to two ends of the axle bag, and the axle bag and the axle tubes are integrally molded through a liquid expansion process; a mounting opening for mounting a main speed reducer is formed in one side of the axle package, the side, opposite to the mounting opening, of the axle package protrudes outwards to form a circular tooth package, the outer wall of the tooth package protrudes in the direction away from the mounting opening to form a convex rib, and the extending length direction of the convex rib is perpendicular to the axial direction of the axle tube. The axle housing is integrally formed through liquid expansion, the strength and rigidity are higher, the material cost is effectively reduced, the coaxiality is better, shape correction and airtight experiments are not needed, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle rear axles, in particular to a hydraulic expansion-molded integrated rear axle housing for a tricycle. Background Art

[0002] Electric tricycles are widely used in production and life due to their strong adaptability, flexibility, simple maintenance, convenient repair, low price, etc. Most existing electric vehicles are rear-wheel drive, and the performance of the rear axle of the electric vehicle during the driving process largely limits the comfort and safety of electric vehicle driving.

[0003] The rear axle housing assembly of traditional tricycles is manufactured by welding a separate middle bridge package and steel pipes on both sides. The processing process is complicated, the cost is high, and the coaxiality error is large. In addition, due to the large number of welds, a sealing test must be carried out after the processing is completed, which increases labor and time costs and reduces production efficiency. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a three-wheeled vehicle liquid expansion molded one-piece rear axle housing, which has higher strength and rigidity, effectively reduces material costs, has better coaxiality, does not require correction and airtightness tests, and improves production efficiency.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a three-wheeled vehicle liquid expansion forming one-piece rear axle housing, including an one-piece axle housing, the one-piece axle housing including a bridge pack and a bridge tube integrally connected to both ends of the bridge pack, the bridge pack and the bridge tube are integrally formed by a liquid expansion process;

[0006] A mounting opening for installing the main reducer is provided on one side of the bridge package. The side of the bridge package opposite to the mounting opening protrudes outward to form a circular tooth package. The outer wall of the tooth package protrudes away from the mounting opening to form a convex rib. The extending length direction of the convex rib is perpendicular to the axial direction of the bridge tube.

[0007] Furthermore, a thickening layer is arranged around the joint between the bridge bag and the bridge pipe; and a reinforcement ring is fixed to the outer wall of the bridge bag close to the installation opening.

[0008] Furthermore, both ends of the integrated bridge housing are connected with external joints; and a leaf spring seat is arranged on the bridge tube.

[0009] Furthermore, the end face of the threaded package is connected to a refueling bolt, and the outer peripheral surface of the bridge package is connected to a side located relatively to the bottom with an oil drain bolt.

[0010] Furthermore, a vent plug is connected to a side of the outer peripheral surface of the bridge pack that is located relatively to the top, and an oil retaining block is provided on the inner wall of the bridge pack corresponding to the bottom of the vent plug.

[0011] Beneficial effects of the utility model:

[0012] The utility model discloses a liquid expansion molded one-piece rear axle housing for a tricycle, in which the axle bag and the axle tube are integrally molded through a liquid expansion process, and the process is simple. Compared with a traditional welded rear axle housing, the utility model uses high-pressure extrusion molding, so the strength and rigidity are higher under the same wall thickness, which can effectively reduce the material cost. Moreover, due to the one-piece molding, the coaxiality is better, and there is no need for correction and airtightness testing, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a front view of the utility model.

[0015] Figure 3 It is a partial cross-sectional view of the utility model in a top view.

[0016] Figure 4 A schematic diagram of the local structure of the utility model when connected with the main reducer.

[0017] Figure 5 It is a partial cross-sectional view of the utility model for reflecting the wall thickness of the integrated bridge housing.

[0018] In the figure: 1. External joint; 2. Leaf spring seat; 3. Integrated bridge housing; 31. Bridge package; 311. Tooth package; 312. Convex rib; 32. Bridge pipe; 33. Thickening layer; 4. Three-way mounting seat; 5. Reinforcement ring; 6. Breathable plug; 7. Oil baffle; 8. Oil drain bolt; 9. Oil filling bolt; 10. Main reducer. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0020] The utility model discloses a hydraulic expansion-formed integrated rear axle housing for a tricycle.

[0021] Reference Figures 1 to 3 A three-wheeled vehicle liquid expansion molded one-piece rear axle housing comprises an one-piece bridge housing 3, an external joint 1, a leaf spring seat 2 and a three-way mounting seat 4; the one-piece bridge housing 3 in this embodiment adopts DP500 high-strength steel, the one-piece bridge housing 3 comprises a bridge bag 31 and a bridge tube 32 integrally connected to both ends of the bridge bag 31, and the bridge bag 31 and the bridge tube 32 are integrally molded through a liquid expansion process; compared with the traditional welded rear axle housing, the present application uses high-pressure extrusion molding, and has higher strength and rigidity under the same wall thickness, which can effectively reduce material costs; and due to the one-piece molding, the coaxiality is better, no correction and airtightness tests are required, and the production efficiency is improved.

[0022] Reference Figure 1 and Figure 4 A mounting opening for the main reducer 10 is provided on one side of the bridge package 31. The side of the bridge package 31 opposite to the mounting opening protrudes outward to form a circular tooth package 311. The outer wall of the tooth package 311 protrudes away from the mounting opening to form a convex rib 312. The length direction of the convex rib 312 is perpendicular to the axial direction of the bridge tube 32. The setting of the convex rib 312 can avoid interference with the reducer gear on the one hand, and on the other hand, it can improve the structural strength of the bridge package 31, so that the rear axle housing can better withstand the vertical load and improve the dynamic characteristics of the bridge housing.

[0023] Reference Figure 5 A thickening layer 33 is provided around the joint of the bridge package 31 and the bridge tube 32; a reinforcement ring 5 is fixed to the outer wall of the bridge package 31 near the installation opening. The thickening layer 33 and the reinforcement ring 5 are provided to enhance the structural strength and rigidity of the stress concentration part of the bridge shell, effectively reducing the risk of the bridge shell being fractured under stress.

[0024] Reference Figure 2 and Figure 3 , the outer joint 1 is welded to the two ends of the integrated bridge housing 3; the leaf spring seat 2 is welded to the upper side of the bridge tube 32. The three-way mounting seat 4 is welded to one of the bridge tubes 32. The end face of the tooth package 311 is connected with a refueling bolt 9, and the side of the outer peripheral surface of the bridge package 31 relative to the bottom is connected with an oil drain bolt 8. The side of the outer peripheral surface of the bridge package 31 relative to the top is connected with a vent plug 6, and the inner wall of the bridge package 31 is provided with an oil retaining block 7 corresponding to the bottom of the vent plug 6.

[0025] In some embodiments, a plurality of rib grooves are formed inwardly on the outer circumferential surface of the bridge tube 32 . The rib grooves extend along the length direction of the bridge tube 32 , which can effectively improve the bending and torsional resistance of the bridge tube 32 .

[0026] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hydraulic expansion-molded one-piece rear axle housing for a tricycle, characterized in that: The integrated bridge housing (3) comprises a bridge package (31) and a bridge tube (32) integrally connected to both ends of the bridge package (31), wherein the bridge package (31) and the bridge tube (32) are integrally formed by a liquid expansion process; One side of the bridge package (31) is provided with an installation opening for installing the main reducer (10); the side of the bridge package (31) opposite to the installation opening protrudes outward to form a circular tooth package (311); the outer wall of the tooth package (311) protrudes in a direction away from the installation opening to form a convex rib (312); the convex rib (312) extends in a length direction perpendicular to the axial direction of the bridge tube (32).

2. The hydraulic expansion-molded one-piece rear axle housing for a tricycle according to claim 1, characterized in that: A thickening layer (33) is arranged around the joint between the bridge bag (31) and the bridge tube (32); and a reinforcement ring (5) is fixed to the outer wall of the bridge bag (31) close to the installation opening.

3. A three-wheeled vehicle hydraulic expansion molded one-piece rear axle housing according to claim 1 or 2, characterized in that: Both ends of the integrated bridge housing (3) are connected to external joints (1); and a leaf spring seat (2) is provided on the bridge tube (32).

4. The hydraulic expansion-molded one-piece rear axle housing for a tricycle according to claim 3, characterized in that: The end surface of the threaded package (311) is connected to a refueling bolt (9), and the outer peripheral surface of the bridge package (31) is connected to an oil drain bolt (8) on a side located relatively to the bottom.

5. The hydraulic expansion-molded one-piece rear axle housing for a tricycle according to claim 4, characterized in that: A vent plug (6) is connected to the side of the outer peripheral surface of the bridge pack (31) that is located relatively to the top, and an oil retaining block (7) is arranged on the inner wall of the bridge pack (31) corresponding to the bottom of the vent plug (6).

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