Split aluminum alloy subframe for low pressure casting

Abstract

The application relates to a split type aluminum alloy subframe for low-pressure casting, which is composed of a right front longitudinal beam, a right rear longitudinal beam, a left front longitudinal beam, a left rear longitudinal beam, a front cross beam and a rear cross beam of cavity type cast aluminum; the right front longitudinal beam, the right rear longitudinal beam, the left front longitudinal beam, the left rear longitudinal beam, the front cross beam and the rear cross beam are welded with each other to form the split type aluminum alloy subframe for low-pressure casting. The frame structure greatly reduces the manufacturing difficulty of the cavity type low-pressure cast aluminum alloy subframe, improves the production efficiency and reduces the production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a passenger car subframe, in particular to a split type aluminum alloy subframe by low pressure casting. BACKGROUND

[0002] The subframe is a component of the automobile frame, and its main function is to bear, block vibration and noise. The aluminum alloy subframe has obvious weight reduction effect compared with the traditional steel subframe, and can achieve 30% weight reduction effect. At present, the low pressure casting aluminum alloy subframe mainly has cavity type and open type two kinds; for the cavity type aluminum alloy subframe, it needs to be cast by sand core, and the complex cavity structure can be obtained, which has high rigidity, wide free modal and constraint modal design range. The existing problem is that in the prior art, the low pressure casting cavity type aluminum alloy subframe is generally of integral type structure, and due to the large structure size, the manufacturing equipment can only be large, the casting mold and sand core mold required are very complex, and the requirements for the casting process are also high, at the same time, the requirements for the machining clamp design are also high and the required number is large, which increases the investment of equipment and tooling, reduces the production rhythm, in addition, the large casting structure is easy to deform, and the shaping tooling needs to be added in the later period, and the production cost is high. SUMMARY

[0003] The purpose of the present application is to improve a split type aluminum alloy subframe by low pressure casting, which has low casting process difficulty, controllable casting deformation, simple mold structure, small machining clamp size, improved machining rhythm, and can utilize the existing equipment to reduce the fixed asset investment.

[0004] The technical scheme of the present application is as follows:

[0005] The split type aluminum alloy subframe by low pressure casting is composed of right front longitudinal beam, right rear longitudinal beam, left front longitudinal beam, left rear longitudinal beam, front cross beam and rear cross beam by cavity type aluminum casting;

[0006] The right front longitudinal beam body is provided with an extension section extending forward, and the end face of the extension section is provided with a first welding interface with a step; the right front longitudinal beam body is provided with left and right extension sections, and the front end of the left extension section is provided with a third welding interface with a step; the left front longitudinal beam is provided with an extension section extending backward, and the end face of the extension section is provided with a second welding interface with a step; the left front longitudinal beam body is respectively provided with left and right extension sections, and the end face of the left extension section is provided with a fourth welding interface with a step;

[0007] The front end face of the right rear longitudinal beam is provided with a sixth welding interface with a step, and the right side face of the front end is provided with a fifth welding interface; the front end right side face of the left rear longitudinal beam is provided with a seventh welding interface, and the rear end face is provided with an eighth welding interface with a step;

[0008] The fifth welding interface of the right rear longitudinal beam is inserted into the step of the third welding interface, welded, the right rear longitudinal beam is connected with the right front longitudinal beam, and a right casting assembly of the auxiliary frame is formed; the seventh welding interface of the left rear longitudinal beam is inserted into the step of the fourth welding interface, welded, the left rear longitudinal beam is connected with the left front longitudinal beam, and a left casting assembly of the auxiliary frame is formed; one end of the front cross beam is inserted into the step of the first welding interface, welded, the other end of the front cross beam is inserted into the step of the second welding interface, welded; one end of the rear cross beam is inserted into the step of the sixth welding interface, welded, the other end of the rear cross beam is inserted into the step of the eighth welding interface, welded, and the split type aluminum alloy auxiliary frame of low-pressure casting is formed.

[0009] The rear end and the lower end of the middle part of the right front longitudinal beam body are respectively provided with a right tie rod adjusting lever mounting bracket and a right H control arm front mounting bracket; the side faces of the left and right extension sections are respectively provided with a right control arm rubber sleeve mounting bracket and a right H control arm rear mounting bracket; and the port of the right extension section of the right front longitudinal beam is provided with a right mounting hole.

[0010] The rear end of the right rear longitudinal beam body is provided with a right rear mounting hole, the lower end is provided with a right suspension mounting bracket extending downward, and the upper end of the body is provided with a protrusion extending upward, and the protrusion is provided with a right swing arm mounting hole for mounting a rear lower swing arm bushing.

[0011] The right swing arm mounting hole is an inclined hole.

[0012] The front end and the lower end of the left front longitudinal beam are respectively provided with a left tie rod adjusting lever mounting bracket and a left H control arm front mounting bracket; the front side faces of the left and right extension sections of the left front longitudinal beam body are respectively provided with a left H control arm rear mounting bracket and a left control arm rubber sleeve mounting bracket; and the port of the right extension section of the left front longitudinal beam is provided with a left mounting hole.

[0013] The front end of the left rear longitudinal beam body is provided with a left rear mounting hole, the lower end is provided with a left suspension mounting bracket, and the upper end of the body is provided with a protrusion extending upward, and the protrusion is provided with a left swing arm mounting hole for mounting a rear lower swing arm bushing.

[0014] The left swing arm mounting hole is an inclined hole.

[0015] The inner side face of the front cross beam is provided with a suspension sleeve mounting hole.

[0016] The aluminum alloy auxiliary frame composed of small castings can greatly reduce the casting process difficulty and control the deformation of the castings. Meanwhile, the size of the casting mold and the sand core mold is small, the mold structure is simple, the size of the machining clamp is small, and the processing cycle is improved. The aluminum alloy auxiliary frame can utilize the existing equipment, reduce the fixed asset investment, and reduce the production cost.

[0017] The auxiliary frame can also be used as a platform product, and the length and cross-sectional shape of the front cross beam and the rear cross beam can be adjusted to be universal. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural diagram of the present application;

[0019] Figure 2 is a perspective view of Figure 1 ;

[0020] Figure 3 is an exploded view of Figure 2 ; Figure 1 ;

[0021] Figure 4 is an exploded view of Figure 2 ; Figure 2 .

[0022] In the drawings, 1 is a right front longitudinal beam, 11 is a right mounting hole, 12 is a first welding interface, 13 is a third welding interface; 2 is a right rear longitudinal beam, 21 is a fifth welding interface, 22 is a right swing arm mounting hole, 23 is a sixth welding interface, 24 is a right suspension mounting bracket, 25 is a right rear mounting hole; 3 is a left front longitudinal beam, 31 is a left mounting hole, 32 is a second welding interface, 33 is a fourth welding interface; 4 is a left rear longitudinal beam, 41 is a seventh welding interface, 42 is a left swing arm mounting hole, 43 is an eighth welding interface, 44 is a left suspension mounting bracket, 45 is a left rear mounting hole, 5 is a front cross beam, 51 is a suspension sleeve mounting hole, 6 is a rear cross beam, A is a right control arm rubber sleeve mounting bracket, B is a right toe adjustment lever mounting bracket, C is a right H control arm front mounting bracket, D is a right H control arm rear mounting bracket, E is a left control arm rubber sleeve mounting bracket, F is a left toe adjustment lever mounting bracket, G is a left H control arm front mounting bracket, N is a left H control arm rear mounting bracket, J is a threaded hole boss for mounting a guard plate, K is a threaded hole boss for mounting a sensor, L is a threaded hole boss for mounting a stabilizer bar. DETAILED DESCRIPTION

[0023] Referring to Figures 1-4 .

[0024] The split type aluminum alloy subframe for low pressure casting described in the present application is composed of a right front longitudinal beam 1, a right rear longitudinal beam 2, a left front longitudinal beam 3, a left rear longitudinal beam 4, a front cross beam 5 and a rear cross beam 6 of cavity type cast aluminum;

[0025] The right front longitudinal beam 1 body is provided with an extending section extending forward, and the end face of the extending section is provided with a first welding interface 12 with a step. The right front longitudinal beam 1 body is respectively provided with extending sections extending leftward and rightward. The front end of the left extending section is provided with a third welding interface 13 with a step. The rear end and the lower end of the middle part of the right front longitudinal beam 1 body are respectively provided with a right caster adjusting rod mounting bracket B and a right H control arm front mounting bracket C. The rear side faces of the left and right extending sections are respectively provided with a right control arm rubber sleeve mounting bracket A and a right H control arm rear mounting bracket D. The port of the right extending section of the right front longitudinal beam 1 is provided with a right mounting hole 11 for mounting a bushing.

[0026] The front end face of the right rear longitudinal beam 2 is provided with a sixth welding interface 23 with a step. The right side face of the front end is provided with a fifth welding interface 21. The rear end of the right rear longitudinal beam 2 body is provided with a right rear mounting hole 25 for mounting a bushing. The lower end is provided with a right suspension mounting bracket 24 extending downward. The upper end of the body is provided with a protrusion extending upward. The protrusion is provided with a right swing arm mounting hole 22 for mounting a rear lower swing arm bushing. The right swing arm mounting hole is an inclined hole.

[0027] The left front longitudinal beam 3 is provided with an extending section extending forward, and the end face of the extending section is provided with a second welding interface 32 with a step. The left front longitudinal beam 3 body is respectively provided with extending sections extending leftward and rightward. The end face of the left extending section is provided with a fourth welding interface 33 with a step. The left front longitudinal beam 3 is provided with an extending section extending forward, and the end face of the extending section is provided with a second welding interface 32 with a step. The left front longitudinal beam 3 body is provided with left and right extending sections. The front end of the left extending section is provided with a fourth welding interface 33 with a step. The front end and the lower end of the left front longitudinal beam 3 are respectively provided with a left caster adjusting rod mounting bracket F and a left H control arm front mounting bracket G. The front side faces of the left and right extending sections of the left front longitudinal beam 3 body are respectively provided with a left H control arm rear mounting bracket N and a left control arm rubber sleeve mounting bracket E. The port of the right extending section of the left front longitudinal beam 3 is provided with a left mounting hole 31 for mounting a bushing.

[0028] The front end right side face of the left rear longitudinal beam 4 is provided with a seventh welding interface 41. The rear end face is provided with an eighth welding interface 43 with a step. The front end of the left rear longitudinal beam 4 body is provided with a left rear mounting hole 45 for mounting a bushing. The lower end is provided with a left suspension mounting bracket 44. The upper end of the body is provided with a protrusion extending upward. The protrusion is provided with a left swing arm mounting hole 42 for mounting a rear lower swing arm bushing. The left swing arm mounting hole is an inclined hole.

[0029] The fifth welding interface 21 of the right rear longitudinal beam 2 is inserted into the step of the third welding interface 13, welded, and the right rear longitudinal beam is connected with the right front longitudinal beam 1 to form the right cast assembly of the subframe; the seventh welding interface 41 of the left rear longitudinal beam 4 is inserted into the step of the fourth welding interface 33, welded, and the left rear longitudinal beam 4 is connected with the left front longitudinal beam 3 to form the left cast assembly of the subframe; one end of the front cross beam 5 is inserted into the step of the first welding interface 12, welded, and the other end of the front cross beam 5 is inserted into the step of the second welding interface 32, welded; one end of the rear cross beam 6 is inserted into the step of the sixth welding interface 23, welded, and the other end of the rear cross beam 6 is inserted into the step of the eighth welding interface 43, welded, to form the split low-pressure cast aluminum alloy subframe.

[0030] The front cross beam 5 is provided with a suspension sleeve mounting hole 51 on the rear side surface, and the suspension sleeve and the suspension sleeve mounting hole 51 are welded and fixed.

[0031] The right front longitudinal beam 1, the right rear longitudinal beam 2, the left front longitudinal beam 3, and the left rear longitudinal beam 4 are all provided with sand core sand leakage holes for leaking residual sand after casting.

[0032] The right front longitudinal beam 1, the right rear longitudinal beam 2, the left front longitudinal beam 3, and the left rear longitudinal beam 4 are respectively provided with threaded hole bosses J for installing a guard plate; the left front longitudinal beam 3 and the left rear longitudinal beam 4 are respectively provided with threaded hole bosses K for installing a sensor; and the right rear longitudinal beam 2 and the left rear longitudinal beam 4 are respectively provided with threaded hole bosses L for installing a stabilizer bar.

Claims

1. A split-type aluminum alloy subframe manufactured by low-pressure casting, characterized in that: The split aluminum alloy subframe consists of a hollow cast aluminum right front longitudinal beam (1), a right rear longitudinal beam (2), a left front longitudinal beam (3), a left rear longitudinal beam (4), a front crossbeam (5), and a rear crossbeam (6); The right front longitudinal beam (1) has a forward-extending extension section, and the end face of the extension section is provided with a first welding interface (12) with a step. The right front longitudinal beam (1) has left and right extending extension sections, and the front end of the left extension section is provided with a third welding interface (13) with a step. The left front longitudinal beam (3) has a rearward-extending extension section, and the end face of the extension section is provided with a second welding interface (32) with a step. The left front longitudinal beam (3) has left and right extending extension sections respectively, and the end face of the left extension section is provided with a fourth welding interface (33) with a step. The front end face of the right rear longitudinal beam (2) is provided with a sixth weld joint (23) with a step, and the right side face of the front end is provided with a fifth weld joint (21); the right side face of the front end of the left rear longitudinal beam (4) is provided with a seventh weld joint (41), and the rear end face is provided with an eighth weld joint (43) with a step. Insert the fifth weld joint (21) of the right rear longitudinal beam into the step of the third weld joint (13) and weld to connect the right rear longitudinal beam to the right front longitudinal beam; insert the seventh weld joint (41) of the left rear longitudinal beam into the step of the fourth weld joint (33) and weld to connect the left rear longitudinal beam to the left front longitudinal beam; insert one end of the front crossbeam (5) into the step of the first weld joint (12) and weld, and insert the other end into the step of the second weld joint (32) and weld; insert one end of the rear crossbeam (6) into the step of the sixth weld joint (23) and weld, and insert the other end into the step of the eighth weld joint (43) and weld to form a split aluminum alloy subframe made by low pressure casting; The rear end and lower end of the middle part of the right front longitudinal beam (1) are respectively provided with a right toe angle adjustment rod mounting bracket (B) and a right H control arm front mounting bracket (C); the sides of the left and right extension sections are respectively provided with a right control arm rubber sleeve mounting bracket (A) and a right H control arm rear mounting bracket (D); the port of the right extension section of the right front longitudinal beam (1) is provided with a right mounting hole (11). The rear end of the right rear longitudinal beam (2) body is provided with a right rear mounting hole (25), the lower end is provided with a right suspension mounting bracket (24), the upper end of the body is provided with an upwardly extending protrusion, and the protrusion is provided with a right swing arm mounting hole (22) for installing the rear lower swing arm bushing. The front end and lower end of the left front longitudinal beam (3) are respectively provided with a left toe angle adjustment rod mounting bracket (F) and a left H control arm front mounting bracket (G); the front sides of the left and right extension sections of the left front longitudinal beam (3) are respectively provided with a left H control arm rear mounting bracket (N) and a left control arm rubber sleeve mounting bracket (E); the port of the right extension section of the left front longitudinal beam (3) is provided with a left mounting hole (31). The front end of the left rear longitudinal beam (4) body is provided with a left rear mounting hole (45), the lower end is provided with a left suspension mounting bracket (44), the upper end of the body is provided with an upwardly extending protrusion, and the protrusion is provided with a left swing arm mounting hole (42) for installing the rear lower swing arm bushing.

2. The subframe according to claim 1, characterized in that: The mounting hole for the right swing arm is an angled hole.

3. The subframe according to claim 1, characterized in that: The mounting hole for the left swing arm is an angled hole.

4. The split-type aluminum alloy subframe manufactured by low-pressure casting according to claim 1, characterized in that: The inner side of the front crossbeam (5) is provided with a suspension sleeve mounting hole (51).

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