A bending and straightening device for stainless steel U-shaped frame of a swivel chair

Abstract

This utility model relates to the field of pipe bending technology, and more particularly to a swivel chair stainless steel U-shaped frame pipe bending and straightening device. The technical solution includes a workbench, with a fixed bracket on top for installation. An electric push rod for driving is located on top of the fixed bracket. A top plate is located below the electric push rod, and an upper template for straightening is located at the bottom of the top plate. A lower template for use with the upper template is located on top of the workbench. Both the lower and upper templates have U-shaped grooves on their surfaces. Positioning components for positioning the U-shaped frame are located on both sides of the lower template. The positioning components include push-pull rods for pushing. This utility model, through the arrangement of push-pull rods, positioning plates, anti-slip pads, gears, toothed plates, ratchet wheels, and pawls, can achieve rapid positioning of the U-shaped frame, effectively preventing processing deviations caused by workpiece displacement during the straightening process and improving the processing quality of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending technology, and in particular to a pipe bending and straightening device for a stainless steel U-shaped frame of a swivel chair. Background Technology

[0002] In the modern office furniture manufacturing industry, swivel chairs, as indispensable office equipment, directly impact user experience and work efficiency through their quality and performance. The stainless steel U-shaped frame of the swivel chair, as its core support component, plays a decisive role in the chair's stability, load-bearing capacity, and lifespan due to its shape accuracy and structural strength. In actual production, the forming of the stainless steel U-shaped frame tubes typically employs a bending process. During this process, due to factors such as material properties and processing techniques, the formed tubes often exhibit certain shape deviations, such as inaccurate bending angles and tube wall deformation. To ensure product quality, straightening equipment is usually used to process the bent tubes.

[0003] Since the lower template lacks components for positioning the U-shaped frame on both sides, the workpiece displacement during the straightening process will cause processing deviations. In view of the above reasons, this application proposes a swivel chair stainless steel U-shaped frame bending and straightening device. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a bending and straightening device for a stainless steel U-shaped frame of a swivel chair.

[0005] The technical solution of this utility model: A bending and straightening device for a stainless steel U-shaped frame of a swivel chair, including a workbench, a fixed bracket for installation on the top of the workbench, an electric push rod for driving on the top of the fixed bracket, a top plate below the electric push rod, an upper template for straightening at the bottom of the top plate, a lower template for cooperating with the upper template on the top of the workbench, U-shaped grooves on the surfaces of both the lower template and the upper template, and positioning components for positioning the U-shaped frame on both sides of the lower template;

[0006] The positioning assembly includes a push-pull rod for pushing, one end of which is fixedly provided with a positioning plate for pressing and fixing, one side of which is provided with an anti-slip pad, and one side of which is provided with a gear for linkage. Above and below the gear are movable cross plates for installation, and above the gear are provided a ratchet and a pawl for locking.

[0007] Optionally, the U-shaped groove sidewall on the lower template is provided with a storage groove, and a limiting hole is provided on one inner wall of the storage groove. Limiting grooves are provided on the top and bottom inner walls of the limiting hole. Limiting strips are fixedly provided on the top and bottom of the push-pull rod, and the limiting strips and limiting grooves are movably connected.

[0008] Optionally, a toothed plate is fixedly provided on one side of the push-pull rod, and the toothed plate meshes with a gear for transmission.

[0009] Optionally, a connecting shaft is fixedly provided at the bottom of the pawl, and a connecting seat is movably provided at the bottom end of the connecting shaft, with the connecting seat and the cross plate being fixedly connected.

[0010] Optionally, the top of the connecting seat is provided with a groove, and a coil spring is fixedly installed in the groove, with the inner ring of the coil spring fixedly sleeved on the connecting shaft.

[0011] Optionally, a rotating rod is fixedly provided at the top and bottom of the gear, and a mounting hole is provided on the side of the two horizontal plates that are close to each other. A bearing is fixedly provided in the mounting hole, and the inner ring of the bearing is fixedly sleeved on the rotating rod.

[0012] Optionally, two pressure sensors are fixedly installed on the top of the lower template, and a PLC and an alarm are fixedly installed on the front of the workbench.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] 1. This utility model, through the setting of push-pull rod, positioning plate, anti-slip pad, gear, toothed plate, ratchet and pawl, can realize the rapid positioning of U-shaped frame, which can effectively prevent processing deviation caused by workpiece displacement during the straightening process and improve the processing quality of the equipment.

[0015] 2. This utility model, through the setting of pressure sensor, PLC and alarm, can preset the downward pressure of the template and monitor the pressure in real time. If the pipe breaks or deforms due to excessive pressure, the PLC will detect the sudden pressure change and trigger the alarm to remind relevant personnel of the abnormal processing, so that they can take timely countermeasures and reduce economic losses. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of this utility model is provided;

[0017] Figure 2 A three-dimensional structural diagram of the lower template in this utility model is provided;

[0018] Figure 3 A three-dimensional structural schematic diagram of the positioning component in this utility model is provided;

[0019] Figure 4 An enlarged structural schematic diagram of point A in this utility model is provided.

[0020] Figure label:

[0021] 1. Workbench;

[0022] 2. Fixed bracket;

[0023] 3. Electric linear actuator;

[0024] 4. Top slab;

[0025] 5. Upload the template;

[0026] 6. Download the template;

[0027] 7. Pressure sensor;

[0028] 8. U-shaped groove;

[0029] 9. Storage tray;

[0030] 10. Limiting hole;

[0031] 11. Positioning assembly; 111. Push-pull rod; 112. Positioning plate; 113. Anti-slip pad; 114. Gear; 115. Horizontal plate; 116. Ratchet; 117. Pawl; 118. Connecting shaft; 119. Connecting seat; 1110. Toothed plate;

[0032] 12. PLC;

[0033] 13. Alarm. Detailed Implementation

[0034] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0035] The components of the embodiments of this disclosure, which are typically described and shown in the accompanying drawings, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of embodiments of this disclosure provided in the drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure.

[0036] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0037] In the description of this disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0038] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0039] Example

[0040] like Figure 1-4 As shown, the present invention proposes a stainless steel U-shaped frame bending and straightening device for swivel chairs, including a workbench 1, a fixed bracket 2 for installation on the top of the workbench 1, an electric push rod 3 for driving on the top of the fixed bracket 2, a top plate 4 below the electric push rod 3, an upper template 5 for straightening on the bottom of the top plate 4, a lower template 6 for cooperating with the upper template 5 on the top of the workbench 1, U-shaped grooves 8 on the surfaces of both the lower template 6 and the upper template 5, and positioning components 11 for positioning the U-shaped frame on both sides of the lower template 6.

[0041] The positioning assembly 11 includes a push-pull rod 111 for pushing; a receiving groove 9 is provided on the side wall of the U-shaped groove 8 on the lower template 6; a limiting hole 10 is provided on one inner wall of the receiving groove 9; limiting grooves are provided on the top and bottom inner walls of the limiting hole 10; limiting strips are fixedly provided on the top and bottom of the push-pull rod 111; the limiting strips and limiting grooves are movably connected; a positioning plate 112 for pressing and fixing is fixedly provided on one end of the push-pull rod 111; an anti-slip pad 113 is provided on one side of the positioning plate 112; a gear 114 for linkage is provided on one side of the push-pull rod 111; a toothed plate 1110 is fixedly provided on one side of the push-pull rod 111; the toothed plate 1110 and the gear 114 mesh and drive; and horizontal supports for installation are movably provided above and below the gear 114. Rotating rods are fixedly provided at the top and bottom of plate 115 and gear 114. Mounting holes are provided on the side of the two horizontal plates 115 that are close to each other. Bearings are fixedly provided in the mounting holes. The inner ring of the bearing is fixedly sleeved on the rotating rod. A ratchet 116 and a pawl 117 for locking are provided above gear 114. A vertical rod is fixedly provided at the bottom of ratchet 116. The vertical rod is fixedly connected to one of the rotating rods. A connecting shaft 118 is fixedly provided at the bottom of pawl 117. A connecting seat 119 is movably provided at the bottom end of the connecting shaft 118. A groove is provided at the top of the connecting seat 119. A coil spring is fixedly provided in the groove. The coil spring can reset pawl 117. The inner ring of the coil spring is fixedly sleeved on the connecting shaft 118. The connecting seat 119 is fixedly connected to the horizontal plate 115.

[0042] Two pressure sensors 7 are fixedly installed on the top of the lower template 6. A PLC 12 and an alarm 13 are fixedly installed on the front of the workbench 1. The pressure sensors 7 are used to monitor the pressure applied by the upper template 5 to the lower template 6. When the preset pressure value is reached, the pressure will automatically stop. If the pipe breaks or deforms due to excessive pressure, the PLC 12 will detect the sudden pressure change and trigger the alarm 13 to sound an alarm.

[0043] In use, first place the pipe to be processed into the U-shaped groove 8. Then, simultaneously push the two push-pull rods 111 towards each other. The push-pull rods 111 drive the positioning plate 112 and the toothed plate 1110. The toothed plate 1110 then drives the gear 114. The gear 114 then drives the ratchet 116 through the rotating rod and the vertical rod. When the ratchet 116 rotates, its external tooth groove will push out the pawl 117. When the next tooth groove moves to the end of the pawl 117, the coil spring drives the connecting shaft 118 to reset the pawl 117 and lock it in the external tooth groove of the ratchet 116, thus positioning the push-pull rods 111 and the positioning plate 112. When the anti-slip pad 113 on the outside of the positioning plate 112 is in contact with the outside of the U-shaped frame, the pressure on the push-pull rods 111 will stop, realizing... After positioning the U-shaped frame, the electric push rod 3 is started for alignment. The downward pressure can be preset by PLC12. The pressure sensor 7 is used to monitor the pressure applied by the upper template 5 to the lower template 6. When the preset pressure value is reached, the downward pressure will automatically stop. If the pipe breaks or deforms due to excessive pressure, PLC12 will detect the sudden pressure change and trigger the alarm 13 to sound an alarm. When the U-shaped frame needs to be removed after processing, the two pawls 117 are rotated simultaneously away from the ratchet 116 to separate the pawls 117 from the ratchet 116. Finally, the two push-pull rods 111 are pulled simultaneously in opposite directions. The push-pull rods 111 drive the positioning plate 112. When the positioning plate 112 is separated from the U-shaped frame, the U-shaped frame can be removed.

[0044] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A swivel chair stainless steel U-shaped frame bending and straightening device, comprising a workbench (1), a fixed bracket (2) for installation is provided on the top of the workbench (1), an electric push rod (3) for driving is provided on the top of the fixed bracket (2), a top plate (4) is provided below the electric push rod (3), an upper template (5) for straightening is provided at the bottom of the top plate (4), a lower template (6) for cooperating with the upper template (5) is provided on the top of the workbench (1), and U-shaped grooves (8) are provided on the surfaces of both the lower template (6) and the upper template (5), characterized in that: Both sides of the lower template (6) are provided with positioning components (11) for positioning the U-shaped frame; The positioning assembly (11) includes a push-pull rod (111) for pushing, one end of which is fixedly provided with a positioning plate (112) for pressing and fixing, one side of which is provided with an anti-slip pad (113), one side of which is provided with a gear (114) for linkage, and both above and below which are provided with a horizontal plate (115) for installation, and above which are provided a ratchet (116) and a pawl (117) for locking.

2. The device according to claim 1, characterized in that, The U-shaped groove (8) on the lower template (6) has a storage groove (9) on its side wall. The inner wall of one side of the storage groove (9) has a limiting hole (10). The upper inner wall and the lower inner wall of the limiting hole (10) are both provided with limiting grooves. The top and bottom of the push-pull rod (111) are both fixedly provided with limiting strips. The limiting strips and the limiting grooves are movably connected.

3. The device according to claim 1, wherein the device is characterized by: A toothed plate (1110) is fixedly provided on one side of the push-pull rod (111), and the toothed plate (1110) and the gear (114) mesh and drive each other.

4. The device according to claim 1, wherein, The bottom of the pawl (117) is fixedly provided with a connecting shaft (118), and the bottom end of the connecting shaft (118) is movably provided with a connecting seat (119), and the connecting seat (119) is fixedly connected to the cross plate (115).

5. The device according to claim 4, wherein the device is characterized by: The top of the connecting seat (119) is provided with a groove, and a coil spring is fixedly provided in the groove. The inner ring of the coil spring is fixedly sleeved on the connecting shaft (118).

6. The device according to claim 1, wherein, Rotating rods are fixedly provided at the top and bottom of the gear (114), and mounting holes are provided on the side of the two horizontal plates (115) that are close to each other. Bearings are fixedly provided in the mounting holes, and the inner ring of the bearings is fixedly sleeved on the rotating rods.

7. The device according to claim 1, wherein, Two pressure sensors (7) are fixedly installed on the top of the lower template (6), and a PLC (12) and an alarm (13) are fixedly installed on the front of the workbench (1).

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