An electric vehicle frame production pipe expanding device

Abstract

The application relates to the technical field of electric vehicle frame production, in particular to an electric vehicle frame production pipe expanding device. The electric vehicle frame production pipe expanding device comprises a bottom plate provided with a pushing assembly and a pipe expanding assembly at the top, the pushing assembly comprises a sliding block in sliding connection with the bottom plate and a fixing assembly connected with the sliding block, a hydraulic cylinder is arranged between the sliding block and the bottom plate, the pipe expanding assembly comprises a core mold and a cylinder body connected with the bottom plate, a heating device is arranged on the inner wall of the cylinder body, and an auxiliary assembly is arranged in the pipe expanding assembly. The steel pipe for producing the electric vehicle frame is fixed by the pushing assembly, the steel pipe can be driven to move close to or away from the pipe expanding assembly, the steel pipe can be heated by the pipe expanding assembly, the pipe expanding assembly is matched with the pushing assembly to expand the pipe, the inside of the steel pipe is intermittently pushed and knocked after pipe expanding, so that the steel pipe is separated from the core mold and is conveniently pulled out from the core mold.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric vehicle frame production, in particular to an electric vehicle frame production pipe expanding device. BACKGROUND

[0002] Electric vehicle frames often use steel pipes with varying diameters, which need to be expanded in diameter by using a pipe expanding device. A hot expanding steel pipe forming process is a process in which a blank sleeved on a die is moved forward under the pushing of a pushing machine, is heated and expanded in diameter in the movement and is formed. A current pipe expanding device is difficult to ensure that the axes of the steel pipe, the heating device and the core mold coincide, the expanded end of the steel pipe is unevenly heated, stress is unevenly distributed, different thicknesses are prone to occur and the expanded section and the axis of the remaining steel pipe are prone to eccentricity.

[0003] Through retrieval, it is found that after pipe expansion is completed, the inner diameter of the steel pipe is reduced due to cooling and shrinkage, the friction between the steel pipe and the core mold is increased, the hydraulic cylinder is more laborious when the steel pipe is pulled out, and the service life of the hydraulic cylinder is consumed too fast. SUMMARY

[0004] The application aims to solve the technical problem of providing an electric vehicle frame production pipe expanding device with long service life.

[0005] In order to solve the above problems, the technical scheme is provided as follows: an electric vehicle frame production pipe expanding device, comprising a bottom plate provided with a pushing assembly and a pipe expanding assembly at the top, the pushing assembly comprises a sliding block in sliding connection with the bottom plate and a fixing assembly connected with the sliding block, a hydraulic cylinder is arranged between the sliding block and the bottom plate, the pipe expanding assembly comprises a core mold and a cylinder connected with the bottom plate, a heating device is arranged on the inner wall of the cylinder, an auxiliary assembly is arranged inside the pipe expanding assembly, the auxiliary assembly comprises a baffle in rotary connection with the core mold and first and second driving assemblies which are the same in structure, the first driving assembly comprises a disc, a first connecting column in eccentric rotary connection with the disc, a first connecting piece in sliding connection with the first connecting column, a second connecting column in rotary connection with the first connecting piece, and a second connecting piece in sliding connection with the second connecting column, the second connecting piece is fixedly connected with the baffle, and the core mold is internally provided with a linkage assembly in driving connection with the first and second driving assemblies.

[0006] As an improvement, the fixing assembly comprises a plurality of pushing pieces in sliding connection with the sliding block, a fixing rod connected with the sliding block, and a fixing block in sliding connection with the fixing rod, one end of the fixing block is provided with a slope matched with the pushing piece, and the sliding block is internally provided with a moving assembly in driving connection with the pushing piece.

[0007] As improvement, the moving assembly comprises a screw fixedly connected with the pushing member, a threaded sleeve threadedly connected with the screw, a spring arranged between the fixed block and the fixed rod, and a second motor arranged at one end of the sliding block and drivingly connected with the screw.

[0008] As improvement, the barrel is sleeved on the surface of the core mold.

[0009] As improvement, the baffle is embedded on the surface of the core mold, and the surface of the baffle is provided with a rotating shaft rotationally connected with the core mold.

[0010] As improvement, the core mold is internally provided with a third sliding groove slidingly connected with the first connecting piece, the first connecting piece is internally provided with a first sliding groove slidingly connected with the first connecting column, and the second connecting piece is internally provided with a second sliding groove slidingly connected with the second connecting column.

[0011] As improvement, the linkage assembly comprises a first gear connected with the disc of the first driving assembly, a second gear connected with the disc of the second driving assembly, and a first motor fixedly arranged in the core mold and drivingly connected with the first gear.

[0012] The present application has the advantages that the pushing assembly is used to fix the steel pipe for producing the electric vehicle frame, and can drive the steel pipe to approach or move away from the pipe expanding assembly, the pipe expanding assembly is used to heat the steel pipe, and the pushing assembly is used to cooperate with the pipe expanding assembly to expand the pipe, and after the pipe expanding, the steel pipe is intermittently pushed and knocked from inside to make the steel pipe separate from the core mold and be conveniently pulled out from the core mold. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the present application;

[0014] Figure 2 is a side view of the present application;

[0015] Figure 3 is a structural view of the present application;

[0016] Figure 4 is a top view of the present application;

[0017] Figure 5 is an enlarged view of A in the present application;

[0018] Figure 6 is an enlarged view of B in the present application.

[0019] 1, bottom plate; 2, cylinder; 3, heating device; 4, core mold; 5, sliding block; 6, fixed rod; 7, fixed block; 8, second motor; 9, hydraulic cylinder; 10, baffle; 11, rotating shaft; 12, second connecting column; 13, second sliding groove; 14, first connecting piece; 15, third sliding groove; 16, disc; 17, first gear; 18, first connecting column; 19, first sliding groove; 20, spring; 21, pusher; 22, threaded sleeve; 23, second connecting piece. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0021] An electric vehicle frame production pipe expanding device, comprising a bottom plate 1 provided with a pushing assembly and a pipe expanding assembly at the top, the pushing assembly comprising a sliding block 5 slidingly connected with the bottom plate 1 and a fixed assembly connected with the sliding block 5;

[0022] The fixed assembly comprises a plurality of pushers 21 slidingly connected with the sliding block 5, a fixed rod 6 connected with the sliding block 5, and a fixed block 7 slidingly connected with the fixed rod 6, one end of the fixed block 7 being provided with a slope matched with the pusher 21, the sliding block 5 being internally provided with a moving assembly drivingly connected with the pusher 21, the moving assembly comprising a screw rod fixedly connected with the pusher 21 and a threaded sleeve 22 threadedly connected with the screw rod, the fixed block 7 and the fixed rod 6 being provided with a spring 20 therebetween, one end of the sliding block 5 being provided with a second motor 8 drivingly connected with the screw rod, the sliding block 5 and the bottom plate 1 being provided with a hydraulic cylinder 9 therebetween, the pipe expanding assembly comprising a core mold 4 connected with the bottom plate 1 and a cylinder 2, the inner wall of the cylinder 2 being provided with a heating device 3, the pipe expanding assembly being internally provided with an auxiliary assembly, the auxiliary assembly comprising a baffle 10 rotationally connected with the core mold 4 and first and second driving assemblies of the same structure, the first driving assembly comprising a disc 16, a first connecting column 18 eccentrically rotationally connected with the disc 16, a first connecting piece 14 slidingly connected with the first connecting column 18, a second connecting column 12 rotationally connected with the first connecting piece 14, and a second connecting piece 23 slidingly connected with the second connecting column 12, the second connecting piece 23 being fixedly connected with the baffle 10, the core mold 4 being internally provided with a linkage assembly drivingly connected with the first and second driving assemblies, the linkage assembly comprising a first gear 17 connected with the disc 16 of the first driving assembly, a second gear connected with the disc 16 of the second driving assembly, and a first motor fixedly arranged in the core mold 4 and drivingly connected with the first gear 17.

[0023] Furthermore, the cylinder 2 is fitted onto the surface of the core mold 4, the baffle 10 is embedded in the surface of the core mold 4, the surface of the baffle 10 is provided with a rotating shaft 11 that is rotatably connected to the core mold 4, the core mold 4 is provided with a third sliding groove 15 that is slidably connected to the first connecting member 14, the first connecting member 14 is provided with a first sliding groove 19 that is slidably connected to the first connecting post 18, the second connecting member 23 is provided with a second sliding groove 13 that is slidably connected to the second connecting post 12, the first motor is a servo motor, and the second motor is a brake motor.

[0024] Working principle: such as Figure 1 As shown, the steel pipe used for manufacturing the electric vehicle frame is fitted onto the fixing rod 6, as follows. Figure 6 As shown, the second motor 8 drives the threaded sleeve 22 to rotate, which in turn causes the screw to move the pusher 21 to the left. The pusher 21 presses the fixing block 7 against the inner wall of the steel pipe through the ramp, thus fixing it in place. The hydraulic cylinder 9 pushes the slider 5 to move, bringing the steel pipe closer to the mandrel 4. The heating component heats the steel pipe, and the mandrel 4 expands the steel pipe.

[0025] After the expansion is completed, such as Figure 5 As shown, the first motor drives the first gear 17 to rotate, the first gear 17 drives the disc 16 to rotate, the disc 16 drives the first connecting column 18 to rotate around the output shaft of the first motor, the first connecting column 18 slides along the first slide groove 19, thereby driving the first connecting column 18 to move back and forth along the third slide groove 15, the first connecting piece 14 drives the second connecting column 12 to move back and forth, so that the second connecting piece 23 drives the baffle 10 to rotate back and forth around the rotating shaft 11, thereby intermittently pushing and knocking the inside of the steel pipe, thereby causing it to detach from the core mold 4. At the same time, the hydraulic cylinder 9 shortens, pulling it off the core mold 4, controlling the second motor 8 to rotate so that the pushing piece 21 moves away from the fixed block 7, and the spring 20 pushes the fixed block 7 away from the steel pipe, thus removing the steel pipe.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An electric vehicle frame production pipe expanding device, comprising a bottom plate (1) provided with a pushing assembly and a pipe expanding assembly on the top, characterized in that: The pushing assembly comprises a sliding block (5) in sliding connection with the bottom plate (1) and a fixing assembly connected with the sliding block (5), a hydraulic cylinder (9) is arranged between the sliding block (5) and the bottom plate (1), the pipe expanding assembly comprises a core mold (4) and a cylinder body (2) connected with the bottom plate (1), a heating device (3) is arranged on the inner wall of the cylinder body (2), an auxiliary assembly is arranged in the pipe expanding assembly, the auxiliary assembly comprises a baffle (10) in rotational connection with the core mold (4) and first and second driving assemblies which are the same in structure, the first driving assembly comprises a disc (16), a first connecting column (18) in eccentric rotational connection with the disc (16), a first connecting piece (14) in sliding connection with the first connecting column (18), a second connecting column (12) in rotational connection with the first connecting piece (14), and a second connecting piece (23) in sliding connection with the second connecting column (12), the second connecting piece (23) is fixedly connected with the baffle (10), and the core mold (4) is internally provided with a linkage assembly in driving connection with the first and second driving assemblies.

2. The device according to claim 1, wherein: The fixing assembly comprises a plurality of pushing pieces (21) in sliding connection with the sliding block (5), a fixing rod (6) connected with the sliding block (5), and a fixing block (7) in sliding connection with the fixing rod (6), one end of the fixing block (7) is provided with a slope matched with the pushing piece (21), and the sliding block (5) is internally provided with a moving assembly in driving connection with the pushing piece (21).

3. The device according to claim 2, wherein: The moving assembly comprises a screw rod fixedly connected with the pushing piece (21) and a threaded sleeve (22) in threaded connection with the screw rod, a spring (20) is arranged between the fixing block (7) and the fixing rod (6), and one end of the sliding block (5) is provided with a second motor (8) in driving connection with the screw rod.

4. The device according to claim 1, wherein: The cylinder body (2) is sleeved on the surface of the core mold (4).

5. The device according to claim 1, wherein: The baffle (10) is embedded on the surface of the core mold (4), and the surface of the baffle (10) is provided with a rotating shaft (11) in rotational connection with the core mold (4).

6. The device according to claim 1, wherein: The core mold (4) is internally provided with a third sliding groove (15) in sliding connection with the first connecting piece (14), the first connecting piece (14) is internally provided with a first sliding groove (19) in sliding connection with the first connecting column (18), and the second connecting piece (23) is internally provided with a second sliding groove (13) in sliding connection with the second connecting column (12).

7. The device according to claim 1, wherein: The linkage assembly comprises a first gear (17) connected with the disc (16) of the first driving assembly, a second gear connected with the disc (16) of the second driving assembly, and a first motor fixedly arranged in the core mold (4) and in driving connection with the first gear (17).

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