Gas cut-off elbow type tightening tool

Abstract

A clutch assembly comprises a driving rod and a clutch, the left end of the driving rod is coaxially connected with the input end of the tightening assembly, a placing block is arranged at the right end of the driving rod, a placing groove is formed in the left end of the clutch, the left end of the clutch is cylindrical, and a shell is connected with a semicircular arc plate in a sliding mode at the position of the left end of the clutch. A rack is arranged at the outward end of the semicircular arc plate in the sliding direction of the semicircular arc plate and meshed with the gear A. A rotating rod A in the left-right direction is rotationally connected into the shell, the left side of the rotating rod A is connected with the gear A, the right side of the rotating rod A is connected with a bevel gear A, and the bevel gear A is meshed with the bevel gear B. A fixing cylinder is arranged at an air inlet of the air inlet valve. A rotating shaft of the sealing plate is coaxially connected with a rotating rod B. The rotating rod B is connected with the bevel gear B. The shell is provided with a gear B meshed with the gear A and a driving component. The air supply stopping device can stop air supply to the pneumatic engine in time, reduces air consumption and is convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of tightening tools, in particular to a shut-off elbow type tightening tool. Background Art

[0002] Pneumatic tightening tools are widely used in many fields due to their advantages such as small size, high output power and small reaction force, meeting the demand for high torque in bolt assembly and disassembly operations.

[0003] Traditional pneumatic tightening tools generally only use a single air intake valve to control the air intake of the pneumatic motor. The air intake valve is manually opened and closed by the user, resulting in the pneumatic tightening tool being unable to stop the air supply to the pneumatic motor in time when tightening the bolt, increasing gas consumption. Utility Model Content

[0004] The utility model aims to provide a shut-off elbow type tightening tool, which can stop the air supply to the pneumatic motor when tightening a bolt connection, thereby reducing gas consumption and being easy to operate.

[0005] The technical solution of the utility model is as follows:

[0006] A shut-off elbow tightening tool comprises a shell, wherein a tightening assembly, a clutch assembly, a pneumatic engine and an air intake valve are sequentially arranged in the shell from left to right, the right end of the shell is provided with an interface for connecting to the air supply pipeline, and a wrench for controlling the opening and closing of the air intake valve is provided outside the shell, the clutch assembly comprises a driving rod and a clutch, the left end of the driving rod is coaxially connected to the input end of the tightening assembly, the right end of the driving rod is provided with a cylindrical insertion block with an elliptical cross-section, the left end of the clutch is provided with an insertion groove with a shape corresponding to the insertion block, the insertion block is placed in the insertion groove, the outer wall shape of the left end of the clutch is cylindrical, the shell is slidably connected to a semicircular plate at the left end of the clutch, and the sliding direction of the semicircular plate is aligned with the center axis direction of the clutch The outer end of the semicircular plate is provided with a rack along its sliding direction, and the rack is engaged with the gear A. The outer shell is rotatably connected with a rotating rod A along the left and right directions. The left end of the rotating rod A is connected with the gear A and the right end is connected with the bevel gear A. The bevel gear A is engaged with the bevel gear B. A fixed cylinder is provided at the air inlet of the intake valve, and a sealing plate is rotatably connected to the inlet of the fixed cylinder. The shape of the sealing plate is equivalent to that of the inlet of the fixed cylinder. The rotating shaft at the lower end of the sealing plate is coaxially connected with the rotating rod B in the vertical direction. The lower end of the rotating rod B is connected to the bevel gear B. The outer shell is provided with a gear B meshing with the gear A and a driving component for driving the gear B to rotate.

[0007] Preferably, an elastic block is provided on the outer side of the semicircular plate in the housing, and the elastic block abuts against the outward end of the semicircular plate.

[0008] Preferably, a guide plate is provided at the outward end of the semicircular arc plate, the guide plate is parallel to the rack, a guide groove corresponding to the guide plate is provided on the shell, and the guide plate is slidably connected to the guide groove.

[0009] Preferably, a torque multiplier is provided between the tightening assembly and the clutch assembly, and between the clutch assembly and the pneumatic motor.

[0010] Preferably, the driving component is a motor, and the output end of the motor is connected to gear B.

[0011] The utility model has the following beneficial technical effects:

[0012] 1. By using the combination of the insert block, the insert groove, the semicircular plate, the rack, the gear A, the bevel gear A, the bevel gear B, the rotating rod A, the rotating rod B, the fixed cylinder and the sealing plate, the air supply to the pneumatic engine can be stopped in time when the bolt connection is locked, thereby reducing the air consumption; when locking the bolt connection, after the head of the tightening component is connected to the bolt connection, the air inlet valve is opened by the wrench, and the pneumatic engine starts after receiving the gas sent from the air pipeline. The pneumatic engine drives the tightening component through the clutch, and the running tightening component rotates the connected bolt connection. When the bolt connection is completely locked, the tightening component connected to it stops rotating, thereby stopping the drive. The rod rotates, but the clutch continues to rotate driven by the pneumatic engine, causing the insertion block connected to the drive rod and the insertion groove on the clutch to stagger with each other. The left end of the clutch is pushed outward by the insertion block, and the outward-expanding left end of the clutch squeezes the semicircular plate in contact with it to slide outward, and the rack moves with the semicircular plate. The outward-moving rack drives the gear A meshed with it to rotate, and the rotating gear A drives the bevel gear A to rotate via the rotating rod A, and the rotating bevel gear A drives the bevel gear B meshed with it to rotate, and the rotating bevel gear B drives the sealing plate to rotate via the rotating rod B. The sealing plate rotates to seal the inlet of the fixed cylinder, thereby achieving the effect of stopping the air supply to the pneumatic engine in time.

[0013] 2. Through the use of the driving mechanism, gear A and gear B, the left end of the clutch is restored to its original state by squeezing the reset semicircular plate, and the sealing plate on the fixed cylinder is reset to facilitate the subsequent locking operation of the bolted connection. After the bolted connection is completely tightened, the wrench is operated to close the intake valve to separate the tightening assembly from the bolted connection. Then the driving mechanism is started to drive gear B to rotate. The rotating gear B drives the gear A meshing with it to rotate. The rotating gear A drives the meshing rack inward on the one hand. The moving rack A resets the semicircular plate. During the resetting process, the semicircular guard plate squeezes the left end of the clutch and the slot back to its original state. The rotating gear A drives the bevel gear A to rotate through the rotating rod A on the other hand. The rotating bevel gear A drives the meshing bevel gear B to rotate. The rotating bevel gear B drives the sealing plate to recover through the rotating rod B, reopening the inlet of the fixed cylinder, restoring the passage between the pneumatic engine and the intake valve, and preparing for the subsequent locking operation of the bolted connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The technical solution of the utility model will be further described below in conjunction with the accompanying drawings.

[0015] Attachment Figure 1 It is the main view of the utility model.

[0016] Attachment Figure 2 This is a cross-sectional view from the main perspective of the present invention.

[0017] Attachment Figure 3 It is a cross-sectional view from the right side of the utility model at the insertion block.

[0018] In the figure: 1-housing, 2-tightening assembly, 3-clutch assembly, 4-pneumatic engine, 5-intake valve, 6-interface, 7-wrench, 8-driving rod, 9-clutch, 10-insertion block, 11-insertion groove, 12-semicircular plate, 13-rack, 14-gear A, 15-rotation rod A, 16-bevel gear A, 17-bevel gear B, 18-fixed cylinder, 19-sealing plate, 20-rotation rod B, 21-gear B, 22-elastic block, 23-guide plate, 24-guide groove. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example:

[0021] like Figures 1 to 3As shown, this embodiment provides a shut-off elbow tightening tool, including a shell 1, in which a tightening assembly 2, a clutch assembly 3, a pneumatic motor 4 and an air intake valve 5 are arranged from left to right in the shell 1. The right end of the shell 1 is provided with an interface 6 for connecting to the gas pipeline, and a wrench 7 for controlling the opening and closing of the air intake valve 5 is provided outside the shell 1. The clutch assembly 3 includes a driving rod 8 and a clutch 9. The left end of the driving rod 8 is coaxially connected to the input end of the tightening assembly 2, and the right end of the driving rod 8 is provided with a cylindrical insertion block 10 with an elliptical cross-section. The left end of the clutch 9 is provided with an insertion groove 11 with a shape corresponding to the insertion block 10. The insertion block 10 is placed in the insertion groove 11. The outer wall shape of the left end of the clutch 9 is cylindrical, and the shell 1 is slidably connected to a semicircular plate 12 at the left end of the clutch 9. The sliding direction of the semicircular plate 12 is opposite to the central axis direction of the clutch 9. Vertically, the inner wall of the semicircular plate 12 abuts against the outer wall of the left end of the clutch 9, and a rack 13 is provided on the outward end of the semicircular plate 12 along its sliding direction. The rack 13 is engaged with the gear A14. A rotating rod A15 is rotatably connected in the left and right directions in the outer shell 1. The left end of the rotating rod A15 is connected to the gear A14 and the right end is connected to the bevel gear A16. The bevel gear A16 is engaged with the bevel gear B17. A fixed cylinder 18 is provided at the air inlet of the intake valve 5. A sealing plate 19 is rotatably connected to the inlet of the fixed cylinder 18. The shape of the sealing plate 19 is equivalent to that of the inlet of the fixed cylinder 18. The rotating shaft of the lower end of the sealing plate 19 is coaxially connected with a rotating rod B20 in the vertical direction. The lower end of the rotating rod B20 is connected to the bevel gear B17. The outer shell 1 is provided with a gear B21 meshing with the gear A14 and a driving component that drives the gear B21 to rotate.

[0022] By using the combination of the inserting block 10, the inserting groove 11, the semicircular arc plate 12, the rack 13, the gear A14, the bevel gear A16, the bevel gear B17, the rotating rod A15, the rotating rod B20, the fixed cylinder 18 and the sealing plate 19, the effect of stopping the air supply to the pneumatic motor 4 in time when the bolt connection is locked is achieved, thereby reducing the air consumption; when the bolt connection is locked, after the head of the tightening component 2 is connected to the bolt connection, the air intake valve 5 is opened by the wrench 7, and the pneumatic motor 4 starts after receiving the gas sent in by the gas pipeline, and the pneumatic motor 4 drives the tightening component 2 through the clutch 9. The running tightening component 2 rotates the connected bolt connection. When the bolt connection is completely locked, the tightening component 2 connected thereto stops, thereby stopping the rotation of the drive rod 8, but The clutch 9 is still driven by the pneumatic engine 4 and continues to rotate, causing the insertion block 10 connected to the drive rod 8 and the insertion groove 11 on the clutch 9 to be staggered with each other. The left end of the clutch 9 is pushed outward by the insertion block 10, and the outward-expanding left end of the clutch 9 squeezes the semicircular plate 12 abutting against it to slide outward, and the rack 13 moves with the semicircular plate 12. The outward-moving rack 13 drives the gear A14 meshed with it to rotate, and the rotating gear A14 drives the bevel gear A16 to rotate via the rotating rod A15. The rotating bevel gear A16 drives the bevel gear B17 meshed with it to rotate, and the rotating bevel gear B17 drives the sealing plate 19 to rotate via the rotating rod B20. The sealing plate 19 rotates to seal the inlet of the fixed cylinder 18, thereby achieving the effect of timely stopping the air supply to the pneumatic engine 4.

[0023] By using the driving mechanism, gear A14 and gear B21 in combination, the left end of the clutch 9 is restored to its original state by squeezing the reset semicircular plate 12, and the sealing plate 19 on the fixed cylinder 18 is helped to reset, so as to facilitate the subsequent locking operation of the bolt connection. After the bolt connection is completely tightened, the wrench 7 is operated to close the intake valve 5, so that the tightening component 2 is separated from the bolt connection, and then the driving mechanism is started to drive the gear B21 to rotate. The rotating gear B21 drives the gear A14 meshing with it to rotate. The rotating gear A14 drives the gear meshing with it to rotate. The bar 13 moves inward, and the moving rack 13A resets the semicircular plate 12. During the resetting process, the semicircular guard plate squeezes the left end of the clutch 9 and the insertion groove 11 back to their original state. On the other hand, the rotating gear A14 drives the bevel gear A16 to rotate via the rotating rod A15, and the rotating bevel gear A16 drives the bevel gear B17 meshing with it to rotate. The rotating bevel gear B17 drives the sealing plate 19 to restore via the rotating rod B20, reopening the inlet of the fixed cylinder 18, restoring the passage between the pneumatic engine 4 and the intake valve 5, and preparing for the subsequent locking operation of the bolted connection.

[0024] Furthermore, an elastic block 22 is provided on the outer side of the semicircular plate 12 in the housing 1 , and the elastic block 22 abuts against the outward end of the semicircular plate 12 .

[0025] The elastic block 22 shares the pressure on the semicircular plate 12 , thereby reducing the probability of deformation of the semicircular plate 12 due to excessive local force.

[0026] Furthermore, a guide plate 23 is provided at the outward end of the semicircular plate 12 , and the guide plate 23 is parallel to the rack 13 . A guide groove 24 corresponding to the guide plate 23 is provided on the housing 1 , and the guide plate 23 is slidably connected to the guide groove 24 .

[0027] By using the guide plate 23 and the guide groove 24 in combination, the moving direction of the semi-circular arc plate 12 is restricted, thereby increasing the stability of the semi-circular arc plate 12 during sliding movement.

[0028] Furthermore, a torque multiplier is provided between the tightening assembly 2 and the clutch assembly 3 , and between the clutch assembly 3 and the pneumatic motor 4 .

[0029] The tightening effect of the tightening assembly 2 is increased by the torque multiplier.

[0030] Furthermore, the driving component is a motor, and the output end of the motor is connected to the gear B21.

[0031] The working principle and use process of this utility model:

[0032] The staff holds the housing 1, connects the head of the tightening component 2 with the bolt connection to be tightened, and then presses the wrench 7 to open the air inlet valve 5. The pneumatic motor 4 that obtains air drives the head of the tightening component 2 to rotate through the clutch 9. When tightening the docked bolt connection, the insertion block 10 and the insertion groove 11 are staggered, and the sealing plate 19 is rotated to seal the inlet of the fixed cylinder 18, stopping the air supply to the pneumatic motor 4 in time. The staff separates the tightening component 2 from the tightened bolt connection, loosens the wrench 7 to close the air inlet valve 5, starts the motor, restores the insertion groove 11, and resets the sealing plate 19.

[0033] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A shut-off elbow tightening tool, comprising a housing, wherein a tightening assembly, a clutch assembly, a pneumatic motor, and an air inlet valve are sequentially arranged inside the housing from left to right. A port for connecting to a gas pipeline is provided at the right end of the housing, and a wrench for controlling the opening and closing of the air inlet valve is provided outside the housing. The tool is characterized by: The clutch assembly includes a driving rod and a clutch, the left end of the driving rod is coaxially connected to the input end of the tightening assembly, the right end of the driving rod is provided with a cylindrical insertion block with an elliptical cross-section, the left end of the clutch is provided with an insertion groove with a shape corresponding to the insertion block, the insertion block is placed in the insertion groove, the outer wall shape of the left end of the clutch is cylindrical, the shell is slidably connected to a semicircular plate at the left end of the clutch, the sliding direction of the semicircular plate is perpendicular to the central axis direction of the clutch, the inner wall of the semicircular plate abuts against the outer wall of the left end of the clutch, and the outward end of the semicircular plate is provided with a rack along its sliding direction. The rack is meshed with gear A, and a rotating rod A is rotatably connected in the outer shell along the left and right directions. The left end of the rotating rod A is connected to gear A and the right end is connected to bevel gear A. The bevel gear A is meshed with bevel gear B. A fixed cylinder is provided at the air inlet of the intake valve, and a sealing plate is rotatably connected to the inlet of the fixed cylinder. The shape of the sealing plate is equivalent to that of the inlet of the fixed cylinder. The rotating shaft at the lower end of the sealing plate is coaxially connected to the rotating rod B in the vertical direction. The lower end of the rotating rod B is connected to the bevel gear B. The outer shell is provided with a gear B meshing with gear A and a driving component that drives the gear B to rotate.

2. The shut-off elbow tightening tool according to claim 1, characterized in that: An elastic block is provided on the outer side of the semicircular plate in the shell, and the elastic block abuts against the outward end of the semicircular plate.

3. The shut-off elbow tightening tool according to claim 1, characterized in that: A guide plate is provided at the outward end of the semicircular plate, the guide plate is parallel to the rack, a guide groove corresponding to the guide plate is provided on the shell, and the guide plate is slidably connected to the guide groove.

4. The shut-off elbow tightening tool according to claim 1, characterized in that: A torque multiplier is respectively provided between the tightening assembly and the clutch assembly, and between the clutch assembly and the pneumatic motor.

5. The shut-off elbow tightening tool according to claim 1, characterized in that: The driving component is a motor, and the output end of the motor is connected to gear B.

Images