Automobile auxiliary frame cleat capable of reducing stress change

Abstract

The utility model relates to an automobile auxiliary frame cleat capable of reducing stress change. The automobile auxiliary frame cleat mainly comprises a cleat support and a lining positioning pipe. The claw support is formed by welding a metal plate upper body and a metal plate lower body which are formed in a stamping mode, and a hollow tubular structure is formed. A transverse extending part of the cleat support is connected with an inclined supporting part through a bent part, the inclined supporting part is fixed to the auxiliary frame, and a lining positioning pipe is arranged in the transverse extending part. The two ends of the lining positioning pipe are provided with protruding parts extending in the axial direction, and the protruding parts are matched with the concave parts on the inner wall of the claw support to form radial and axial limiting. The transverse extending part of the cleat support is further provided with a through hole communicated with an inner hole of the lining positioning pipe, and the diameter of the through hole is smaller than the outer diameter of the lining positioning pipe. By omitting a welding structure of the cleat bracket and the bushing positioning pipe, the stress change caused by welding is reduced, the production efficiency is improved, the production cost is reduced, and energy conservation and environmental protection are realized; by optimizing the structural design, the size precision and durability of the auxiliary frame are improved, and the service life of the auxiliary frame is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, specifically relates to a car subframe horn that reduces stress change. BACKGROUND

[0002] The subframe is a very important automobile part, which is used for connecting the vehicle body, engine and suspension, and bears the impact load and vibration from the engine and road surface, so it has very high requirements for strength and durability, and must also meet the NVH performance. The subframe generally has a horn structure for connecting the suspension system to the subframe and bearing the load from the suspension system, which usually includes a horn bracket and a bushing positioning tube for connecting the vehicle body.

[0003] However, the horn bracket and the bushing positioning tube are welded and fixed to each other in the prior art, for example, CN105882751A discloses a car subframe horn that reduces stress change. The side of the body connecting sleeve of this car subframe horn that reduces stress change is fixed to the horn bracket by a connecting weld. The welding and fixing of the horn bracket and the bushing positioning tube to each other has a large heat input and high power consumption, which increases the production cost, is not conducive to social carbon emission and energy saving and environmental protection, and is also not conducive to the control of the overall vehicle cost. The large welding heat input causes severe thermal deformation of the horn bracket, which makes it difficult to control the size precision of the subframe and reduces the overall vehicle quality. In addition, stress change occurs when the horn bracket and the bushing positioning tube are welded, and the welded position may be damaged due to fatigue after long-term use of the vehicle. SUMMARY

[0004] The utility model aims at the corresponding insufficient of prior art, provides a kind of car subframe horn that reduces stress change, this car subframe horn cancels the welding structure of horn bracket and bushing positioning tube, reduce the stress change generated when horn bracket and bushing positioning tube are welded, also have the advantages such as low production cost, energy saving and environmental protection.

[0005] The utility model is implemented by the following scheme:

[0006] A car subframe horn that reduces stress change includes a horn bracket and a bushing positioning tube. The horn bracket is formed by welding a stamping-formed sheet metal upper body and a sheet metal lower body. The sheet metal upper body is in the shape of a downwardly open trapezoidal groove. The sheet metal lower body covers the opening of the sheet metal upper body to form a hollow tubular structure.

[0007] The transversely extending portion of the horn bracket is connected to the obliquely supporting portion through a bending portion. The fixed end of the obliquely supporting portion is welded and fixed to the subframe. The bushing positioning tube is vertically arranged in the hollow tube of the transversely extending portion.

[0008] Both end faces of the bush positioning pipe are provided with axially extending protrusions, and the inner walls of the upper body web plate and the lower body web plate of the metal sheet of the transversely extending part of the Y-shaped support are both provided with recesses for matching the protrusions;

[0009] The protrusions at both end faces of the bush positioning pipe are clearance fitted in the recesses of the transversely extending part of the Y-shaped support, so as to limit the bush positioning pipe in the radial direction, and the two end faces of the bush positioning pipe abut against the upper body of the metal sheet and the lower body of the metal sheet respectively, so as to limit the bush positioning pipe in the axial direction.

[0010] The upper body web plate and the lower body web plate of the transversely extending part of the Y-shaped support are both provided with through holes communicating with the inner holes of the bush positioning pipe, and the diameters of the through holes are smaller than the outer diameter of the bush positioning pipe.

[0011] Preferably, the axially extending protrusions at both end faces of the bush positioning pipe are annular bosses, and the recesses provided in the transversely extending part of the Y-shaped support are annular grooves.

[0012] Preferably, the axial lengths of the annular bosses at both end faces of the bush positioning pipe are both 1 mm, and the thicknesses of the upper body of the metal sheet and the lower body of the metal sheet are both 1.5 mm.

[0013] Preferably, the annular bosses at both end faces of the bush positioning pipe are coaxial with the bush positioning pipe.

[0014] Preferably, the annular grooves provided in the transversely extending part of the Y-shaped support are both concentric with the through holes, and the outer diameters of the annular grooves are all greater than the outer diameter of the annular boss by 1 mm.

[0015] Preferably, the hole diameter of the bush positioning pipe is smaller than the diameter of the through hole.

[0016] The beneficial effects of the utility model are as follows:

[0017] Reduced production cost: by canceling the welding structure of the Y-shaped support and the bush positioning pipe, the complexity of the welding process and the heat input are reduced, so as to reduce the production cost; energy saving and environmental protection: the energy consumption and carbon emission in the welding process are reduced, which is helpful for energy saving and emission reduction and meets the environmental protection requirements; improved dimensional accuracy: due to the reduction of the thermal deformation caused by welding, the dimensional accuracy of the auxiliary frame is more easily controlled, and the overall vehicle quality is improved; enhanced durability: the welding structure of the Y-shaped support and the bush positioning pipe is canceled, the stress change is reduced, the fatigue damage risk of the welding position is reduced, and the service life of the auxiliary frame is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Fig. 1 is a structural schematic view of one side of the utility model;

[0019] Fig. 2 Fig. 2 is a structural schematic view of the other side of the utility model;

[0020] Fig. 3 It is the structure schematic view of bushing positioning pipe in the utility model;

[0021] Fig. 4 It is the inside structure schematic view of sheet metal lower body in the utility model. Specific implementation

[0022] As Figs. 1 to 4 shown, a stress change reducing automobile subframe horn, including horn support 1 and bushing positioning pipe 2, the horn support 1 is by the sheet metal upper body 31 and sheet metal lower body 32 welding forming of stamping forming, the sheet metal upper body 31 is open downward trapezoidal groove, the sheet metal upper body 31 includes web and the wing plate of web both sides, the wing plate expands outward, forms the trapezoidal groove sheet metal upper body 31 of narrow top wide bottom, the sheet metal lower body 32 covers the opening of sheet metal upper body 31, forms hollow tubular structure, the hollow tubular structure horn support 1 arbitrary cross section all is trapezoidal, thereby increase the structural strength of horn support 1;

[0023] The transverse extension 11 of the horn support 1 is connected with the oblique support part 13 through the bending part 12, the fixed end of the bottom of the oblique support part 13 is welded and fixed with the subframe, usually is welded and fixed with the longitudinal beam upper plate of the subframe, the shape of the fixed end of the oblique support part 13 is according to the design of the subframe, meets the requirements of envelope, avoidance, the hollow tube of the transverse extension 11 is vertically provided with the bushing positioning pipe 2;

[0024] The both ends of the bushing positioning pipe 2 are provided with the protruding part 21 extending in the axial direction, the protruding part 21 is annular boss in the embodiment, the annular boss of the both ends of the bushing positioning pipe 2 is coaxial with the bushing positioning pipe 2, the protruding part 21 can also be selected in the form of key, the inner wall of the web of the sheet metal upper body 31 and the inner wall of the sheet metal lower body 32 of the transverse extension 11 of the horn support 1 are all provided with the recessed part 131 for matching the protruding part 21, the recessed part 131 is annular groove in the embodiment, the annular groove can also be selected when the protruding part 21 is key, recess.

[0025] The protruding part 21 of the both ends of the bushing positioning pipe 2 is gap fitted in the recessed part 131 of the transverse extension 11 of the horn support 1, the bushing positioning pipe 2 is radially limited, the both ends of the bushing positioning pipe 2 are respectively abutted with the sheet metal upper body 31 and the sheet metal lower body 32, and the bushing positioning pipe 2 is axially limited.

[0026] The sheet metal upper body 31 web and the sheet metal lower body 32 of the transverse extension 11 of the horn support 1 are all provided with the through hole 14 communicating with the inner hole of the bushing positioning pipe 2, and the diameter of the through hole 14 is less than the outer diameter of the bushing positioning pipe 2.

[0027] In the embodiment, the axial length of the annular protrusion at both ends of the bushing positioning tube 2 is 1 mm, and the thickness of the upper metal body 31 and the lower metal body 32 is 1.5 mm; the outer diameter of the annular groove is 1 mm larger than the outer diameter of the annular protrusion, so that the annular protrusion is clearance fitted in the annular groove, and the hole diameter of the bushing positioning tube 2 is smaller than the diameter of the through hole 14.

[0028] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and the changes made by the person skilled in the art without departing from the spirit of the present application fall within the protection scope of the present application.

Claims

1. A stress variation reducing automotive subframe horn, comprising a horn bracket (1) and a bushing locating tube (2), characterized in that: The horn bracket (1) is formed by welding a stamping formed upper metal body (31) and a stamping formed lower metal body (32), the upper metal body (31) is in the shape of a downwardly open trapezoidal groove, and the lower metal body (32) covers the opening of the upper metal body (31) to form a hollow tubular structure. The transverse extension (11) of the horn bracket (1) is connected with the oblique support (13) through a bending portion (12), the fixed end of the oblique support (13) is welded and fixed with the auxiliary frame, and the hollow tube of the transverse extension (11) is vertically provided with a bushing positioning tube (2). The two end faces of the bushing positioning tube (2) are provided with axially extending protrusions (21), and the inner walls of the web of the upper metal body (31) and the inner wall of the lower metal body (32) of the transverse extension (11) of the horn bracket (1) are each provided with a recess (131) for cooperating with the protrusion (21). The protrusions (21) on the two end faces of the bushing positioning tube (2) are gap fitted in the recesses (131) of the transverse extension (11) of the horn bracket (1), so as to limit the radial position of the bushing positioning tube (2), and the two end faces of the bushing positioning tube (2) are respectively abutted with the upper metal body (31) and the lower metal body (32), so as to limit the axial position of the bushing positioning tube (2). The web of the upper metal body (31) and the lower metal body (32) of the transverse extension (11) of the horn bracket (1) are each provided with a through hole (14) communicating with the inner hole of the bushing positioning tube (2), and the diameter of the through hole (14) is smaller than the outer diameter of the bushing positioning tube (2).

2. The automotive subframe horn with reduced stress variation of claim 1, wherein: The protrusions (21) axially extending on the two end faces of the bushing positioning tube (2) are annular bosses, and the recesses (131) provided in the transverse extension (11) of the horn bracket (1) are annular grooves.

3. The automotive subframe horn with reduced stress variation of claim 2, wherein: The axial length of the annular boss on the two end faces of the bushing positioning tube (2) is 1 mm, and the thickness of the upper metal body (31) and the lower metal body (32) is 1.5 mm.

4. The automotive subframe horn with reduced stress variation of claim 2, wherein: The annular boss on the two end faces of the bushing positioning tube (2) is coaxial with the bushing positioning tube (2).

5. The automotive subframe horn with reduced stress variation of claim 2, wherein: The annular grooves provided in the transverse extension (11) of the horn bracket (1) are each coaxial with the through hole (14), and the outer diameter of the annular groove is 1 mm larger than the outer diameter of the annular boss.

6. The automotive subframe horn with reduced stress variation of claim 1, wherein: The hole diameter of the bushing positioning tube (2) is smaller than the diameter of the through hole (14).

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