A pneumatic nut tightening device

Abstract

This utility model discloses a pneumatic nut clamping device, including a worktable. A power structure is fixedly installed on the lower surface of the worktable, and a pressure sensor is embedded inside the power structure. A displacement sensor is fixedly installed on the surface of the power structure. A controller is fixedly installed on the front surface of the worktable, and a clamping structure is embedded on the upper surface of the worktable. The worktable includes an L-shaped support plate, a table surface, a fixed nut, an adjusting seat, a sliding groove, a first threaded rod, and a T-slot. The upper surface of the table surface has a T-slot, and an L-shaped support plate is fixedly installed on one side of the upper surface of the table surface. The upper surface of the L-shaped support plate has a sliding groove, and the first threaded rod is embedded inside the sliding groove. This pneumatic nut clamping device can adapt to different workpieces, monitor clamping parameters in real time, and achieve flexible operation.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic nut tightening, and in particular to a pneumatic nut tightening device. Background Technology

[0002] A pneumatic nut tightening device is a mechanical fastening device that uses compressed air as a power source for precise nut tightening. In industrial scenarios such as automobile manufacturing, aerospace and electronics assembly, nut tightening is a key process to ensure the stability of product structure and is widely used in automobile manufacturing, aerospace and electronics assembly fields. However, when fixing workpieces, the positioning mechanism lacks flexibility. For different specifications of workpieces and nuts, the positioning components need to be changed frequently, resulting in low work efficiency and poor clamping force control accuracy. It relies heavily on the operator's experience to adjust the air pressure, which can easily lead to over-clamping, causing damage to the workpiece, or under-clamping, causing the risk of loosening. To address this, we propose a pneumatic nut clamping device. Utility Model Content

[0003] The main purpose of this utility model is to provide a pneumatic nut tightening device, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A pneumatic nut clamping device includes a worktable, a power structure fixedly mounted on the lower surface of the worktable, a pressure sensor embedded inside the power structure, a displacement sensor fixedly mounted on the surface of the power structure, a controller fixedly mounted on the front surface of the worktable, and a clamping structure embedded in the upper surface of the worktable.

[0005] Furthermore, the workbench includes an L-shaped support plate, a tabletop, a fixing nut, an adjusting seat, a sliding groove, a first threaded rod, and a T-slot. The upper surface of the tabletop has a T-slot, and an L-shaped support plate is fixedly installed on one side of the upper surface of the tabletop. The upper surface of the L-shaped support plate has a sliding groove, and a first threaded rod is embedded inside the sliding groove. A fixing nut is fitted onto the surface of the first threaded rod, and an adjusting seat is fixedly installed on the lower surface of the first threaded rod.

[0006] Furthermore, the power structure includes a pneumatic motor, a pneumatic-hydraulic booster cylinder, a piston, a buffer plate, a spring, a transmission rod, and a clamping head. The pneumatic motor is connected to the lower part of the pneumatic motor. A piston is embedded inside the pneumatic-hydraulic booster cylinder. A transmission rod is fixedly installed on the lower surface of the pneumatic-hydraulic booster cylinder. A buffer plate is sleeved on the surface of the transmission rod above the buffer plate. A spring is sleeved on the surface of the transmission rod above the buffer plate. A clamping head is sleeved on the surface of the transmission rod below the buffer plate.

[0007] Furthermore, the pneumatic motor is fixedly installed on the lower surface of the adjusting seat, the pressure sensor is embedded in the inside of the pneumatic-hydraulic booster cylinder, the displacement sensor is fixedly installed on the surface of the transmission rod, and the controller is fixedly installed on the front surface of the platform.

[0008] Furthermore, the clamping structure includes a U-shaped plate, screw holes, a second threaded rod, anti-slip pads, a T-shaped block, and clamping plates. A T-shaped block is fixedly installed on the lower surface of the U-shaped plate in the middle. Anti-slip pads are fixedly installed on the lower surface of the U-shaped plate in front of and behind the T-shaped block. Screw holes are opened on the front and rear surfaces of the U-shaped plate. A second threaded rod is embedded in the interior of each screw hole. Clamping plates are rotatably connected to the adjacent surfaces of the second threaded rod.

[0009] Furthermore, the T-shaped block is embedded inside the T-shaped groove.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: 1. Through the combination design of T-slot and clamping structure, it can quickly adapt to workpieces of different sizes. The clamping head supports clamping operations of nuts of various specifications without the need to replace the whole device, thus improving work efficiency. 2. Pressure and displacement sensors collect operating parameters in real time to ensure minimal clamping force error; 3. The main frame is made of lightweight aluminum alloy, and the adjustable seat can be moved flexibly, making it suitable for operation in narrow spaces. The buffer component effectively absorbs vibration, resulting in low noise and improved operating comfort. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the workbench of this utility model; Figure 3 This is a detailed drawing of the power structure of this utility model; Figure 4 This is a cross-sectional view of the U-shaped plate of this utility model; Figure 5 For the present utility model Figure 3 A magnified view of the details at point A.

[0012] In the diagram: 1. Workbench; 101. L-shaped support plate; 102. Table surface; 103. Fixing nut; 104. Adjusting seat; 105. Slide groove; 106. First threaded rod; 107. T-slot; 2. Power structure; 201. Pneumatic motor; 202. Pneumatic-hydraulic booster cylinder; 203. Piston; 204. Buffer plate; 205. Spring; 206. Transmission rod; 207. Pressing head; 3. Clamping structure; 301. U-shaped plate; 302. Screw hole; 303. Second threaded rod; 304. Anti-slip pad; 305. T-block; 306. Clamping plate; 4. Controller; 5. Pressure sensor; 6. Displacement sensor. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] Reference Figure 1-5 A pneumatic nut clamping device includes a worktable 1, a power structure 2 fixedly installed on the lower surface of the worktable 1, a pressure sensor 5 embedded inside the power structure 2, a displacement sensor 6 fixedly installed on the surface of the power structure 2, a controller 4 fixedly installed on the front surface of the worktable 1, and a clamping structure 3 embedded on the upper surface of the worktable 1. Specifically, the position of the power structure 2 and the clamping structure 3 can be supported and adjusted through the worktable 1. The workpiece is clamped and fixed by the clamping structure 3, the power structure 2 performs the pressing operation, the controller 4 realizes the control, and the pressure sensor 5 and the displacement sensor 6 monitor the parameter changes.

[0015] In a preferred embodiment, the workbench 1 includes an L-shaped support plate 101, a table surface 102, a fixing nut 103, an adjusting seat 104, a slide groove 105, a first threaded rod 106, and a T-slot 107. The upper surface of the table surface 102 is provided with a T-slot 107. The L-shaped support plate 101 is fixedly installed on one side of the upper surface of the table surface 102. The upper surface of the L-shaped support plate 101 is provided with a slide groove 105. The first threaded rod 106 is embedded in the slide groove 105. The fixing nut 103 is sleeved on the surface of the first threaded rod 106. The adjusting seat 104 is fixedly installed on the lower surface of the first threaded rod 106. Specifically, by making the tabletop 102 a one-piece aluminum alloy structure, its lightweight is achieved. The first threaded rod 106 is located inside the slide groove 105 and can move inside the slide groove 105 to adjust the position of the adjusting seat 104. The position of the adjusting seat 104 is fixed by the fixing nut 103. When the position of the adjusting seat 104 needs to be determined, the fixing nut 103 is tightened on the surface of the first threaded rod 106.

[0016] In a preferred embodiment, the power structure 2 includes a pneumatic motor 201, a pneumatic-hydraulic booster cylinder 202, a piston 203, a buffer plate 204, a spring 205, a transmission rod 206, and a pressing head 207. The pneumatic motor 201 is connected to the pneumatic-hydraulic booster cylinder 202 below. The piston 203 is embedded inside the pneumatic-hydraulic booster cylinder 202. The transmission rod 206 is fixedly installed on the lower surface of the pneumatic-hydraulic booster cylinder 202. The buffer plate 204 is sleeved on the surface of the transmission rod 206 above the buffer plate 204. The spring 205 is sleeved on the surface of the transmission rod 206 above the buffer plate 204. The pressing head 207 is sleeved on the surface of the transmission rod 206 below the surface. Specifically, the clamping operation is achieved through the combined action of a pneumatic motor 201, a pneumatic-hydraulic booster cylinder 202, a piston 203, and a clamping head 207. The pneumatic motor 201 is connected to an external air source via an air pipe equipped with an electromagnetic reversing valve. The pneumatic motor 201 adopts a vane-type structure, with an output speed of 1500-2000 r / min and an adaptable air pressure range of 0.4-0.6 MPa. The pneumatic-hydraulic booster cylinder 202 has a hydraulic chamber and a pneumatic chamber, which are separated by the piston 203. The output end of the pneumatic-hydraulic booster cylinder 202 is connected to the piston 207. The moving rod 206 is rigidly connected. The maximum output force of the pneumatic-hydraulic booster cylinder 202 is 5-20kN, and the stroke adjustment range is 10-50mm. The end of the transmission rod 206 is provided with an external thread interface. The inner surface of the clamping head 207 is provided with an internal thread, and it is connected to the transmission rod 206 through thread engagement. The clamping head 207 is available in various specifications, and its end shape is adapted to hexagonal nuts, round nuts, and square nuts respectively. The surface of the clamping head 207 is plated with a hard alloy layer. The buffer plate 204 and the spring 205 generate a buffering effect when the clamping head 207 contacts the workpiece to reduce impact vibration.

[0017] In a preferred embodiment, the pneumatic motor 201 is fixedly installed on the lower surface of the adjusting seat 104, the pressure sensor 5 is embedded in the interior of the pneumatic-hydraulic booster cylinder 202, the displacement sensor 6 is fixedly installed on the surface of the transmission rod 206, and the controller 4 is fixedly installed on the front surface of the table 102. Specifically, the pneumatic motor 201 is fixed below the adjusting seat 104, and the adjusting seat 104 adjusts the horizontal position of the pneumatic motor 201. The pressure sensor 5 is selected from Keyence AP-10S series or Omron E8F2 series, with a range of 0-30MPa (corresponding to the output force requirement of the pneumatic-hydraulic booster cylinder 202). It has a miniaturized structure that can be embedded inside the hydraulic chamber and supports direct transmission of analog (4-20mA) signals to the controller 4. The displacement sensor 6 is model IL-1000, fixed on the side of the transmission rod 206, and used to monitor the extension and retraction stroke of the transmission rod 206. The signal output terminals of the pressure sensor 5 and the displacement sensor 6 are electrically connected to the controller 4. The controller 4 is electrically connected to the solenoid directional valve. The controller 4 has a built-in PLC chip and supports preset clamping force threshold and stroke threshold. When the detected parameter exceeds the threshold, the controller 4 automatically controls the solenoid directional valve to cut off the air supply to achieve overload protection.

[0018] In a preferred embodiment, the clamping structure 3 includes a U-shaped plate 301, screw holes 302, a second threaded rod 303, an anti-slip pad 304, a T-shaped block 305, and a clamping plate 306. The lower surface of the U-shaped plate 301 is fixedly installed with the T-shaped block 305 in the middle. The lower surface of the U-shaped plate 301 is fixedly installed with anti-slip pads 304 in front of and behind the T-shaped block 305. Screw holes 302 are opened on the front and rear surfaces of the U-shaped plate 301. The second threaded rod 303 is embedded in the screw holes 302. The adjacent surfaces of the second threaded rod 303 are rotatably connected to the clamping plate 306. Specifically, by rotating the second threaded rod 303, the threads on the surface of the second threaded rod 303 engage with the threads on the inner surface of the threaded hole 302, causing the second threaded rod 303 to move back and forth, thereby driving the clamping plate 306 to move and achieve clamping and fixing of the workpiece. The anti-slip pad 304 is a rubber pad that is fixed to the worktable 1 by friction and can achieve buffering and reduce noise. Since the second threaded rod 303 and the clamping plate 306 are rotatably connected, when the second threaded rod 303 rotates, the clamping plate 306 can move in the horizontal direction. And since the clamping plate 306 is in contact with the U-shaped plate 301, the clamping plate 306 will not rotate.

[0019] In a preferred embodiment, the T-block 305 is embedded inside the T-slot 107; Specifically, by embedding the T-block 305 into the T-slot 107, the U-shaped plate 301 can move on the table 102, thereby adjusting the position of the workpiece.

[0020] It should be noted that during use, the U-shaped plate 301 is adjusted to a suitable position according to the size of the workpiece, so that the T-shaped block 305 slides inside the T-slot 107. The second threaded rod 303 is rotated, causing the clamping plate 306 to move in the opposite direction, thereby clamping and fixing the workpiece. The appropriate clamping head 207 is selected according to the nut specification and fixed to the end of the transmission rod 206 by threaded connection. The clamping force threshold and stroke threshold are preset on the controller 4. The controller 4 starts the solenoid reversing valve, and external compressed air enters the pneumatic motor 201 to drive it to rotate. At the same time, the air pressure pushes the piston in the pneumatic-hydraulic booster cylinder 202. The 203 movement converts pneumatic energy into hydraulic energy, which drives the pressing head 207 downward via the transmission rod 206. During the pressing process, the pressure sensor 5 monitors the pressure in the hydraulic chamber of the pneumatic-hydraulic booster cylinder 202 in real time, and the displacement sensor 6 monitors the stroke of the transmission rod 206. The data is transmitted to the controller 4 in real time. When the pressing force reaches the preset threshold and the stroke meets the requirements, the controller 4 controls the solenoid reversing valve to switch, and the pneumatic motor 201 reverses to drive the pressing head 207 to reset, completing one pressing operation. If the pressing force is detected to exceed 10kN (overload threshold), the controller 4 immediately cuts off the air supply and triggers an alarm.

[0021] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A pneumatic nut tightening device, characterized in that: The device includes a workbench (1), a power structure (2) is fixedly installed on the lower surface of the workbench (1), a pressure sensor (5) is embedded inside the power structure (2), a displacement sensor (6) is fixedly installed on the surface of the power structure (2), a controller (4) is fixedly installed on the front surface of the workbench (1), and a clamping structure (3) is embedded on the upper surface of the workbench (1).

2. The pneumatic nut tightening device according to claim 1, characterized in that: The workbench (1) includes an L-shaped support plate (101), a table surface (102), a fixing nut (103), an adjusting seat (104), a slide groove (105), a first threaded rod (106), and a T-slot (107). The upper surface of the table surface (102) is provided with a T-slot (107). The upper surface of the table surface (102) is fixedly installed on one side with an L-shaped support plate (101). The upper surface of the L-shaped support plate (101) is provided with a slide groove (105). The first threaded rod (106) is embedded in the slide groove (105). The surface of the first threaded rod (106) is fitted with a fixing nut (103). The lower surface of the first threaded rod (106) is fixedly installed with an adjusting seat (104).

3. The pneumatic nut tightening device according to claim 2, characterized in that: The power structure (2) includes a pneumatic motor (201), a pneumatic-hydraulic booster cylinder (202), a piston (203), a buffer plate (204), a spring (205), a transmission rod (206), and a pressing head (207). The pneumatic motor (201) is connected to the pneumatic-hydraulic booster cylinder (202) below. The piston (203) is embedded inside the pneumatic-hydraulic booster cylinder (202). The transmission rod (206) is fixedly installed on the lower surface of the pneumatic-hydraulic booster cylinder (202). The buffer plate (204) is sleeved on the surface of the transmission rod (206) above the buffer plate (204). The spring (205) is sleeved on the surface of the transmission rod (206) above the buffer plate (204). The pressing head (207) is sleeved on the surface of the transmission rod (206) below the buffer plate (204).

4. The pneumatic nut tightening device according to claim 3, characterized in that: The pneumatic motor (201) is fixedly installed on the lower surface of the adjusting seat (104), the pressure sensor (5) is embedded in the inside of the pneumatic-hydraulic booster cylinder (202), the displacement sensor (6) is fixedly installed on the surface of the transmission rod (206), and the controller (4) is fixedly installed on the front surface of the table (102).

5. A pneumatic nut tightening device according to claim 4, characterized in that: The clamping structure (3) includes a U-shaped plate (301), a screw hole (302), a second threaded rod (303), an anti-slip pad (304), a T-shaped block (305), and a clamping plate (306). The lower surface of the U-shaped plate (301) is fixedly installed with the T-shaped block (305) in the middle. The lower surface of the U-shaped plate (301) is fixedly installed with anti-slip pads (304) in front of and behind the T-shaped block (305). The front and rear surfaces of the U-shaped plate (301) are provided with screw holes (302). The second threaded rod (303) is embedded in the screw hole (302). The adjacent surfaces of the second threaded rod (303) are rotatably connected to the clamping plate (306).

6. A pneumatic nut tightening device according to claim 5, characterized in that: The T-block (305) is embedded in the interior of the T-slot (107).

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