Pipe expanding device for pressing ring of lower framework of automobile seat

Abstract

The utility model relates to a pipe expanding device for a pressing ring of a lower framework of an automobile seat, which belongs to the field of automobile seat processing and comprises a base and a hydraulic assembly. The hydraulic assembly comprises a hydraulic cylinder, a fixing frame flange sleeve pressing rod, a large screw rod, a large nut, a threaded sleeve, a small screw rod, a ball outer sleeve, a ball spring and a guide sleeve. The sliding rail and the air cylinder are fixedly connected with the base. The lower part of the tray is slidably connected with the slide rail; the tray is fixedly connected with a piston rod of the cylinder; due to the fact that the screw rod and the spring are arranged between the flange sleeve and the pressing rod, floating connection between the flange sleeve and the pressing rod can be achieved, eccentric errors between the front transverse pipe and the rear transverse pipe and between the front transverse pipe and the rear transverse pipe and between the front transverse pipe and the rear transverse pipe and between the front transverse pipe and the rear transverse pipe and between the front transverse pipe and the clamping head are effectively made up. And the waste of production efficiency caused by manually and repeatedly adjusting the position of the seat lower framework assembly by a worker is avoided.

Description

Technical Field

[0001] The utility model relates to the field of automobile seat processing, in particular to a ring pressing and tube expanding device for a lower frame of an automobile seat. Background Art

[0002] The front frame of an automobile seat requires a hydraulic cylinder to push a pressure rod to expand the tubes and press the clamping ring, securing the front and rear transverse tubes to the side panels to form the lower frame subassembly. The existing pressure rod and flange sleeve are in close contact, and the flange sleeve and the device base remain fixed. This disadvantage is that when the front and rear transverse tubes are installed, the clearance error between the side panels causes a large offset between the expansion and clamping heads. This can lead to insufficient tube expansion and the clamping head being unable to complete the clamping process. Summary of the Invention

[0003] In view of the deficiencies of the existing technology, the present invention has developed a device for pressing and expanding the frame ring of a car seat. The technical solution adopted by the present invention is: a device for pressing and expanding the frame ring of a car seat, which is characterized in that it includes a base 1 and a hydraulic assembly 2; the hydraulic assembly 2 includes a hydraulic cylinder 3, a fixing frame 4, a flange sleeve 5, a pressure rod 6, a large screw 13, a large nut 14, a threaded sleeve 15, a small screw 16, a ball sleeve 17, a ball 18, a spring 19 and a guide sleeve 20; the hydraulic cylinder 3 is arranged in the fixing frame 4; the fixing frame 4 is fixedly connected to the base 1; the flange sleeve 5 is fixedly connected to the fixing frame 4; the large nut 14 and the threaded sleeve 15 are respectively fixedly connected to the flange sleeve 5; the guide sleeve 20 is fixedly connected to the large nut 14; the ball sleeve 17 is arranged in the flange sleeve 5; the pressure rod 6 passes through the fixing frame 4, the flange sleeve 5 and the ball sleeve 17. The ball sleeve 17 has one end fixedly connected to the piston rod of the hydraulic cylinder 3, and the other end can be connected to the expansion head 7 or the clamping head 8; the ball 18 is arranged between the ball sleeve 17 and the pressure rod 6; the large screw 13 passes through the guide sleeve 20 and is threadedly connected to the large nut 14, and its lower end passes through the flange sleeve 5, which can squeeze the ball sleeve 17 after rotation; the spring 19 is placed in the threaded sleeve 15, and its lower end passes through the flange sleeve 5; the small screw 16 is threadedly connected to the threaded sleeve 15; the slide rail 9 and the cylinder 10 are respectively fixedly connected to the base 1; the lower part of the tray 12 is slidably connected to the slide rail 9; the tray 12 is fixedly connected to the piston rod of the cylinder 10; the positioning fixture 11 is arranged on the tray 12.

[0004] The benefits of the present invention are reflected in the following aspects: since 6 screws and 1 spring are provided between the flange sleeve and the pressure rod, a floating connection between the flange sleeve and the pressure rod can be achieved, effectively compensating for the eccentricity error between the front and rear cross tubes and the expansion head and the clamping head, ensuring sufficient expansion and smooth clamping, and avoiding the waste of production efficiency caused by workers repeatedly manually adjusting the position of the frame assembly under the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 This is a schematic top view of the structure of a car seat lower frame pressing ring and expanding tube device of the utility model;

[0006] Figure 2 yes Figure 1 The main structural diagram of the flange sleeve;

[0007] Figure 3 This is a top view of the utility model when it is installed in the lower frame of the seat;

[0008] Figure 4 yes Figure 1 A right side view of the positioning fixture covering the front cross pipe;

[0009] Figure 5 This is a schematic diagram of the state when the utility model simultaneously completes the expansion of the front transverse tube and the clamping of the rear transverse tube;

[0010] In the figure: 1 base; 2 hydraulic assembly; 3 hydraulic cylinder; 4 fixing bracket; 5 flange sleeve; 6 pressure rod; 7 expansion head; 8 clamping head; 9 slide rail; 10 cylinder; 11 positioning fixture; 12 pallet; 13 large screw; 14 large nut; 15 threaded sleeve; 16 small screw; 17 ball bearing sleeve; 18 ball bearing; 19 spring; 20 guide sleeve; 21 seat lower frame; 22 front cross pipe; 23 side panel; 24 rear cross pipe. DETAILED DESCRIPTION

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0012] like Figure 1 and Figure 2As shown, the utility model is a car seat lower frame pressing ring expansion device comprising: a base 1 and a hydraulic assembly 2; the hydraulic assembly 2 comprises a hydraulic cylinder 3, a fixing frame 4, a flange sleeve 5, a pressure rod 6, a large screw 13, a large nut 14, a threaded sleeve 15, a small screw 16, a ball sleeve 17, a ball 18, a spring 19 and a guide sleeve 20; the hydraulic cylinder 3 is arranged in the fixing frame 4; the fixing frame 4 is fixedly connected to the base 1; the flange sleeve 5 is fixedly connected to the fixing frame 4; the large nut 14 and the threaded sleeve 15 are respectively fixedly connected to the flange sleeve 5; the guide sleeve 20 is fixedly connected to the large nut 14; the ball sleeve 17 is arranged in the flange sleeve 5; the pressure rod 6 passes through the fixing frame 4, the flange sleeve 5 and the ball sleeve 17 , one end of which is fixedly connected to the piston rod of the hydraulic cylinder 3, and the other end can be connected to the expansion head 7 or the clamping head 8; the ball 18 is arranged between the ball sleeve 17 and the pressure rod 6; the large screw 13 passes through the guide sleeve 20 and is threadedly connected to the large nut 14, and its lower end passes through the flange sleeve 5, which can squeeze the ball sleeve 17 after rotation; the spring 19 is placed in the threaded sleeve 15, and its lower end passes through the flange sleeve 5; the small screw 16 is threadedly connected to the threaded sleeve 15; the slide rail 9 and the cylinder 10 are respectively fixedly connected to the base 1; the lower part of the tray 12 is slidably connected to the slide rail 9; the tray 12 is fixedly connected to the piston rod of the cylinder 10; the positioning fixture 11 is provided on the tray 12.

[0013] like Figure 1 As shown, four hydraulic assemblies 2 are installed on the base 1. The pressure rods 6 of the two hydraulic assemblies 2 facing each other on the upper side are installed with expansion heads 7; the pressure rods 6 of the two hydraulic assemblies 2 facing each other on the lower side are installed with clamping heads 8. The hydraulic cylinder 3 is set in the fixed frame 4, and the rear part of the fixed frame 4 supports the hydraulic cylinder 3.

[0014] like Figure 2 As shown, six large screws 13 and a spring 19 are provided on the flange sleeve 5. By rotating the six large screws, the relative position of the pressure rod 6 in the flange sleeve 5 can be adjusted. The ball sleeve 17 and the ball 18 ensure that the pressure rod 6 moves more smoothly in the axial direction.

[0015] When doing specific operations, such as Figure 3 and Figure 4 As shown, the worker first places the pre-assembled seat lower frame 21 into the four positioning fixtures 11 on the tray 12, and covers the four positioning fixtures to complete the positioning of the seat lower frame 21. Figure 5As shown, the worker operates the piston rod of the cylinder 10 to retract, and the tray 12 is moved to the operating position along the slide rail 9. At this time, the front cross tube 22 should be concentric with the expansion head 7; the rear cross tube 24 should be concentric with the punching head 8. The worker operates the four hydraulic cylinders to work simultaneously. The two expansion heads 7 squeeze the front cross tube 22 in opposite directions; the two punching heads 8 simultaneously punch the clamping ring on the rear cross tube 24. After completing the expansion and punching processes, the worker reverses the operation of the hydraulic cylinder 3 and the cylinder 10 to return the lower frame 21 of the seat to the original position. Figure 3 and remove the seat lower frame 21.

[0016] When the eccentricity between the expansion head 7, the clamping head 8 and the front transverse tube 22 and the rear transverse tube 24 is large, the worker can rotate any one or several of the six large screws to adjust the concentricity of the pressure rod and the front and rear transverse tubes; rotating the small screw 16 can adjust the pressure of the spring 19 on the ball roller sleeve 17, so that the pressure rod has a certain floating space in the ball roller sleeve 17. When the eccentricity is small, the expansion and clamping processes can be successfully completed without rotating the large screw.

[0017] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A car seat lower frame pressing ring expansion device, characterized in that: The invention comprises a base (1) and a hydraulic assembly (2); the hydraulic assembly (2) comprises a hydraulic cylinder (3), a fixing frame (4), a flange sleeve (5), a pressure rod (6), a large screw (13), a large nut (14), a threaded sleeve (15), a small screw (16), a ball sleeve (17), a ball (18), a spring (19) and a guide sleeve (20); the hydraulic cylinder (3) is arranged in the fixing frame (4); the fixing frame (4) is fixedly connected to the base (1); the flange sleeve (5) is fixedly connected to the fixing frame (4); the large nut (14) and the threaded sleeve (15) are respectively fixedly connected to the flange sleeve (5); the guide sleeve (20) is fixedly connected to the large nut (14); the ball sleeve (17) is arranged in the flange sleeve (5); the pressure rod (6) passes through the fixing frame (4), the flange sleeve (5) and the ball sleeve (17), and one end thereof is fixedly connected to the The piston rod of the hydraulic cylinder (3) is fixedly connected, and the other end can be connected to the expansion head (7) or the clamping head (8); the ball (18) is arranged between the ball sleeve (17) and the pressure rod (6); the large screw (13) passes through the guide sleeve (20) and is threadedly connected to the large nut (14), and its lower end passes through the flange sleeve (5), and can squeeze the ball sleeve (17) after rotation; the spring (19) is placed in the threaded sleeve (15), and its lower end passes through the flange sleeve (5); the small screw (16) is threadedly connected to the threaded sleeve (15); the slide rail (9) and the cylinder (10) are respectively fixedly connected to the base (1); the lower part of the tray (12) is slidably connected to the slide rail (9); the tray (12) is fixedly connected to the piston rod of the cylinder (10); the positioning fixture (11) is arranged on the tray (12).

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