A reciprocating push-pull tool suitable for ratchet device

Abstract

The present invention is a reciprocating push-pull tool suitable for a ratchet device, which belongs to the technical field of pre-tightening / loosening of cabin end face bolts, and comprises a driving mechanism, a transmission mechanism, and an installation connection mechanism, wherein the installation connection mechanism is installed on an M16x1.5 thread on the cabin section, and is fixedly connected to the cabin section through the thread; the transmission mechanism is installed on the installation connection mechanism, and is firmly and reliably connected to the transmission mechanism through the thread; at the same time, it is connected to the M4 threaded hole of the ratchet device, and is used to realize the push-pull movement of the ratchet device; the driving mechanism is installed at the front end of the transmission mechanism, and provides power for the transmission mechanism; the present invention can realize manual connection with the threaded hole on the outer wall of the cabin section, and generate a certain thrust by driving a motor to realize the reciprocating push-pull movement of the ratchet device, and realize the assembly requirements of bolt pre-tightening and loosening under horizontal assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of bolt pre-tightening / loosening, and in particular relates to a reciprocating push-pull tool suitable for a ratchet device. Background Art

[0002] In the field of aviation and aerospace manufacturing, the end faces of large hull compartments are connected by bolts. Since the bolts are inside, common methods of bolt disassembly and assembly include oblique bolts, slotting, etc., which have long relied on manual labor. Large shell parts are large in size, and the efficiency and precision of bolt tightening are high. Two to three people are required to tighten from different positions, which poses certain safety hazards and is extremely dependent on the operating experience of observers. In this context, high-efficiency and high-precision requirements are put forward for the disassembly and assembly of bolts after the compartments are docked. A ratchet device is installed inside to replace manual operation with electric equipment; through the feedback of force sensors and the mutual cooperation of electric, the tightening torque is constant and the tightening process is automated, which is highly efficient.

[0003] The ratchet device installed inside the bulkhead needs to be pushed and pulled to drive the bolts to rotate and tighten the bolts. Due to the limited space and interface of the ratchet device installed in the cabin, the lever arm is small and the tightening torque is large, which makes the process of tightening the bolts more complicated. It is impossible to pre-tighten the bolts manually without tools. Therefore, in view of the current product assembly requirements, a reciprocating push-pull tool suitable for the ratchet device is urgently needed to achieve the pre-tightening / loosening of the bolts in the cabin through a large torque and high-speed electric tool. Summary of the invention

[0004] In response to the above problems, the purpose of the present invention is to provide a reciprocating push-pull tool suitable for a ratchet device, which can realize the pre-tightening / loosening of the bolts in the cabin through a large torque and high-speed electric tool, thereby achieving the reliable connection and assembly requirements of the cabin sections.

[0005] In order to achieve the above purpose, the technical solution to achieve the purpose of the present invention is:

[0006] A reciprocating push-pull tool suitable for a ratchet device, the reciprocating push-pull tool comprising a driving mechanism, a transmission mechanism, and an installation connection mechanism, wherein the installation connection mechanism is installed on an M16x1.5 thread on a cabin section and is fixedly connected to the cabin section through the thread; the transmission mechanism is installed on the installation connection mechanism, and the installation connection mechanism is connected to the M4 threaded hole of the ratchet device to realize the push-pull movement of the ratchet device; the driving mechanism is installed at the front end of the transmission mechanism to provide power for the transmission mechanism.

[0007] Furthermore, the driving mechanism includes a servo motor and a harmonic reducer, wherein the servo motor is connected to the harmonic reducer by bolts, and the harmonic reducer is connected to a base by bolts.

[0008] Furthermore, the transmission mechanism includes a base, a cam, a hand-cranked shaft, a square handle, a cam follower, a transmission shaft, a guide seat, a linear bearing, a pin, and a connecting rod, wherein the base is connected to the guide seat, the cam is coaxially mounted on the harmonic reducer, the hand-cranked shaft and the harmonic reducer are connected to the axial hole via a key, the square handle is connected to the base via a bolt, the cam follower is mounted on the transmission shaft, and the linear bearing is placed in the guide seat.

[0009] Furthermore, the harmonic reducer and the cam are positioned by means of positioning pins.

[0010] Furthermore, a deep groove ball bearing is arranged between the hand-cranked shaft and the base to eliminate the friction and shaking clearance of the transmission shaft during high-speed movement; a shaft retaining ring is arranged axially between the hand-cranked shaft and the base to limit the forward and backward movement of the manual shaft.

[0011] Furthermore, the cam is a groove cam structure, the planar groove is provided with an arc to adjust the equipment stroke, and the cam follower is placed in the groove of the cam and always moves in the groove during the movement process.

[0012] Furthermore, the linear bearing is placed between the guide seats and is limited by set screws.

[0013] Furthermore, the transmission shaft is placed at both ends of the guide seat and rolling limit is performed using set screws.

[0014] Furthermore, the end of the guide seat is gap-connected to the connecting rod via the latch.

[0015] Furthermore, the mounting and connecting mechanism includes a force sensor mounting seat, a force sensor, a lubricating nut, a fixing nut, a connecting sleeve, and a connecting handwheel, wherein the connecting sleeve passes through the force sensor mounting seat, the force sensor, and the lubricating nut, the force sensor mounting seat and the guide seat are connected by bolts, the force sensor is mounted in the force sensor mounting seat, the lubricating nut is mounted in the force sensor mounting seat to lubricate the axial movement of the connecting sleeve, the connecting sleeve is mounted in the force sensor mounting seat and the force sensor, and the connecting handwheel is sleeved on the connecting sleeve by a set screw.

[0016] Furthermore, the force sensor is gap-connected to the force sensor mounting seat, and the force sensor is fixed by the fixing nut and the top screw.

[0017] Furthermore, the connecting sleeve is connected to the bulkhead by rotating the connecting hand wheel.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are:

[0019] The present invention fills the gap in the domestic reciprocating push-pull tooling suitable for ratchet devices, and realizes the pre-tightening / loosening of the bolts in the cabin through a large torque and high-speed electric tooling;

[0020] The present invention detects the tightening torque through a force sensor, realizes the automatic conversion of the loading speed from fast to slow (pre-tightening) and from slow to fast (loosening), and the torque accuracy after stopping is ±1Nm;

[0021] The invention can be adjusted with the ratchet device and the bulkhead interface, has strong adaptability, and can be reliably connected with the product to meet the pre-tightening / loosening requirements of the bolts in the cabin; BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a reciprocating push-pull tooling provided in an embodiment;

[0023] Figure 2 is a schematic diagram of a driving mechanism provided in an embodiment;

[0024] Figure 3 is a cross-sectional schematic diagram of a transmission mechanism provided in an embodiment;

[0025] Figure 4 It is a partial schematic diagram of the transmission mechanism provided in the embodiment;

[0026] Figure 5 is a cross-sectional schematic diagram of the mounting connection mechanism provided in the embodiment;

[0027] Among them, 1 is a driving mechanism, 2 is a transmission mechanism, 3 is a mounting and connecting mechanism, 4 is a servo motor, 5 is a harmonic reducer, 6 is a base, 7 is a cam, 8 is a hand-cranked shaft, 9 is a square handle, 10 is a cam follower, 11 is a transmission shaft, 12 is a guide seat, 13 is a linear bearing, 14 is a latch, 15 is a connecting rod, 16 is a force sensor mounting seat, 17 is a force sensor, 18 is a lubrication nut, 19 is a fixing nut, 20 is a connecting sleeve, 21 is a connecting handwheel, 22 is a ratchet device, and 23 is a corner box. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0029] This embodiment provides a reciprocating push-pull tool suitable for a ratchet device, specifically comprising:

[0030] like Figure 1As shown, a reciprocating push-pull tool suitable for a ratchet device is characterized in that it includes a driving mechanism 1, a transmission mechanism 2, and a mounting connection mechanism 3, wherein the mounting connection mechanism 1 is mounted on an M16x1.5 thread on the cabin section and is fixedly connected to the cabin section through the thread; the transmission mechanism 2 is mounted on the mounting connection mechanism 3 and is firmly and reliably connected to the transmission mechanism 2 through the thread; at the same time, it is connected to the M4 threaded hole of the ratchet device 22 to realize the push-pull movement of the ratchet device; the driving mechanism 1 is mounted on the front end of the transmission mechanism 2 to provide power for the transmission mechanism 2;

[0031] like Figure 2 As shown, the driving mechanism 1 includes a servo motor 4 and a harmonic reducer 5, wherein the servo motor 4 is connected to the harmonic reducer 5 by bolts, and the harmonic reducer 5 is connected to the base 6 by bolts;

[0032] like Figure 3 As shown, the transmission mechanism includes a base 6, a cam 7, a hand-cranked shaft 8, a square handle 9, a cam follower 10, a transmission shaft 11, a guide seat 12, a linear bearing 13, a latch 14, and a connecting rod 15, wherein the base 6 is connected to the guide seat 12 by bolts, the cam 7 is mounted on the harmonic reducer 5, the hand-cranked shaft 8 and the harmonic reducer 5 are connected to each other through a key through an axial hole, the square handle 9 is connected to the base 6 by bolts, the cam follower 10 is mounted on the transmission shaft 11, and the linear bearing 13 is placed in the guide seat 12.

[0033] like Figure 4 As shown, the harmonic reducer 5 and the cam 7 are positioned by positioning pins during the installation process;

[0034] Furthermore, a deep groove ball bearing is provided between the hand-cranked shaft 8 and the base 6 to eliminate the friction and shaking clearance of the transmission shaft 11 during high-speed movement; a shaft retaining ring is provided axially between the hand-cranked shaft 8 and the base 6 to limit the forward and backward movement of the manual shaft;

[0035] Furthermore, the cam follower 10 is placed in the groove of the cam 7 and always moves in the groove during the movement;

[0036] Furthermore, the linear bearing 13 is placed between the guide seats 12 and is limited by a set screw;

[0037] Furthermore, the transmission shaft 11 is placed at both ends of the guide seat 12 and uses set screws to limit the rolling motion;

[0038] Furthermore, the guide seat 12 and the connecting rod 15 are gap-connected through the latch 14, so that the connecting rod 15 can have a certain amount of movement during the movement to adapt to the ratchet device 22;

[0039] like Figure 5 As shown, the mounting and connecting mechanism 3 includes a force sensor mounting seat 16, a force sensor 17, a lubricating nut 18, a fixing nut 19, a connecting sleeve 20, and a connecting handwheel 21, wherein the force sensor mounting seat 16 is connected to the guide seat 12 by bolts, the force sensor 17 is mounted in the force sensor mounting seat 16, the lubricating nut 18 is mounted in the force sensor mounting seat 16, and lubricates the axial movement of the connecting sleeve 20, the connecting sleeve 20 is mounted in the force sensor mounting seat 16 and the force sensor 17, and the connecting handwheel 21 is fixed to the connecting sleeve 20 by a set screw;

[0040] Furthermore, the force sensor 17 is gap-connected to the force sensor mounting seat 16, and the force sensor 17 is fixed by the fixing nut 19 and the top screw;

[0041] Furthermore, the connecting sleeve 20 is connected to the bulkhead by rotating the connecting hand wheel 21 .

[0042] The working principle of the present invention is:

[0043] The connecting rod of the present invention is connected through the M4 threaded hole inside the manual blind ratchet device; the reciprocating push-pull tooling connects the connecting sleeve to the M16X1.5 thread of the cabin section by rotating the connecting hand wheel; the relative position of the card slot of the connecting rod and the card slot of the reciprocating push-pull tooling is adjusted by the hand crank, and the latch is inserted after the two card slots overlap, so that the tooling and the connecting rod are reliably connected;

[0044] The cam is driven by the servo motor and harmonic reducer on the driving mechanism, which in turn drives the transmission shaft to reciprocate along a straight line in the linear bearing; the connecting rod performs follow-up motion, and under the action of the clearance-fitted pin, it has a certain amount of activity to adapt to the swing of the ratchet during movement; during the entire movement process, the force is detected in real time by the force sensor, thereby realizing the monitoring of the bolt loading torque.

[0045] During the entire pre-tightening process, the equipment first runs at the set loading speed, and records the curve of force and bolt turns for manual observation. When the force value of the force sensor reaches the set force value, the loading speed of the equipment moves at the limited speed until the set limited torque value is reached, and the equipment stops automatically. During the entire loosening process, the equipment first pushes and pulls 4 times at the limited loading speed, and then the loading speed of the equipment moves at the set speed. After the equipment reaches the set number of turns, the equipment stops automatically.

[0046] After pre-tightening / loosening is completed, pull out the pin to disengage the connecting rod from the guide shaft; rotate the connecting handwheel counterclockwise to disengage the connecting sleeve from the bulkhead thread; rotate the connecting rod counterclockwise to disengage the connecting rod from the ratchet device thread, and finally restore to the initial state.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reciprocating push-pull tool suitable for a ratchet device, characterized in that: The reciprocating push-pull tooling comprises a driving mechanism (1), a transmission mechanism (2), and a mounting connection mechanism (3), wherein the mounting connection mechanism (3) is mounted on an M16x1.5 thread on the cabin section and is fixedly connected to the cabin section via the thread; the transmission mechanism (2) is mounted on the mounting connection mechanism (3), and the mounting connection mechanism (3) is connected to an M4 threaded hole of a ratchet device (22) to realize the push-pull movement of the ratchet device; the driving mechanism (1) is mounted at the front end of the transmission mechanism (2) to provide power for the transmission mechanism.

2. The reciprocating push-pull tooling for ratchet device according to claim 1, characterized in that: The driving mechanism (1) comprises a servo motor (4) and a harmonic reducer (5), wherein the servo motor (4) is connected to the harmonic reducer (5) via bolts, and the harmonic reducer (5) is connected to a base (6) via bolts.

3. The reciprocating push-pull tooling for ratchet device according to claim 2, characterized in that: The transmission mechanism (2) comprises a base (6), a cam (7), a hand-cranked shaft (8), a square handle (9), a cam follower (10), a transmission shaft (11), a guide seat (12), a linear bearing (13), a latch (14), and a connecting rod (15), wherein the base (6) is connected to the guide seat (12), the cam (7) is coaxially mounted on the harmonic reducer (5), the hand-cranked shaft (8) and the harmonic reducer (5) are connected to each other via a key through an axial hole, the square handle (9) and the base (6) are connected via a bolt, the cam follower (10) is mounted on the transmission shaft (11), and the linear bearing (13) is placed in the guide seat (12).

4. The reciprocating push-pull tooling for ratchet device according to claim 3, characterized in that: The harmonic reducer (5) and the cam (7) are positioned by means of positioning pins.

5. The reciprocating push-pull tooling for ratchet device according to claim 3, characterized in that: A deep groove ball bearing is arranged between the hand-cranked shaft (8) and the base (6) to eliminate friction and shaking clearance of the transmission shaft during high-speed movement; and a shaft retaining ring is arranged axially between the hand-cranked shaft (8) and the base (6) to limit the forward and backward movement of the manual shaft.

6. The reciprocating push-pull tool suitable for a ratchet device according to claim 3, characterized in that: The end of the guide seat (12) is gap-connected to the connecting rod (15) via the latch (14).

7. The reciprocating push-pull tooling for ratchet device according to claim 4, characterized in that: The mounting and connecting mechanism (3) comprises a force sensor mounting seat (16), a force sensor (17), a lubricating nut (18), a fixing nut (19), a connecting sleeve (20), and a connecting hand wheel (21), wherein the connecting sleeve (20) penetrates the force sensor mounting seat (16), the force sensor (17), and the lubricating nut (18); the force sensor mounting seat (16) and the guide seat (12) are connected by bolts; the force sensor (17) is mounted in the force sensor mounting seat (16); the lubricating nut (18) is mounted in the force sensor mounting seat (16) to lubricate the axial movement of the connecting sleeve (20); the connecting sleeve (20) is mounted in the force sensor mounting seat (16) and the force sensor (17); and the connecting hand wheel (21) is sleeved on the connecting sleeve (20) by a set screw.

8. The reciprocating push-pull tooling for ratchet device according to claim 7, characterized in that: The force sensor (17) is gap-connected to the force sensor mounting seat (16), and the force sensor is fixed by means of the fixing nut (19) and the top screw.

9. The reciprocating push-pull tooling for ratchet device according to claim 8, characterized in that: The connecting sleeve (20) is connected to the bulkhead by rotating the connecting hand wheel (21).

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