Flexible tightening device

Abstract

The utility model discloses a flexible tightening device, which belongs to the technical field of mechanical equipment, and comprises a lifting driving device, a tightening driving device, a tightening actuating structure, a passive tightening head, a floating joint and an active tightening head, the lifting driving device can realize the up-and-down movement of the tightening driving device and the tightening actuating structure, and when the tightening actuating mechanism moves downwards, the floating joint and the active tightening head are driven by the floating joint. The driving tightening head arranged on the floating connector and the driven tightening head arranged on a component needing to be tightened are connected to form a tooth-shaped clutch structure, the floating connector can compensate floating assembly errors, normal operation of the device is ensured, meanwhile, stress concentration can be reduced, the service life of the device is prolonged, the tightening heads do not need to be replaced, and the cost is reduced. The passive tightening heads of different models only need to be arranged on the to-be-tightened parts of the corresponding models in a sleeving mode, and tightening operation can be conducted on the to-be-tightened parts of different specifications on one operation line without pause.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical equipment, and in particular relates to a flexible tightening device. Background Art

[0002] The main ways of cooperating threaded workpieces of existing equipment are equipment tightening and manual tightening. Equipment tightening usually involves fixing the rotating shaft of the equipment with the part to be tightened, then turning on the equipment, and rotating the rotating end to drive the equipment to rotate and tighten.

[0003] However, the existing equipment has the following problems:

[0004] 1. The motor shaft of the existing tightening equipment is usually connected to the shafts of equipment such as reducers and torque limiters to form a shaft assembly. The more equipment is connected, the greater the assembly error of the shaft assembly, the more serious the axial deviation, which will lead to unstable operation of the equipment. In addition, the shaft assembly is usually formed by rigid connection of the shafts without a buffer structure. When the running equipment is vibrated, the shaft is easy to break.

[0005] 2. When faced with parts of different specifications to be tightened, such as screw tightening, nut tightening and bolt tightening, it is necessary to stop the equipment operation and replace the tightening head of the tightening equipment. For example, when tightening a cross screw, it is necessary to replace the cross joint. Utility Model Content

[0006] In order to solve the problems raised in the above-mentioned background technology, the utility model provides a flexible tightening device to solve the problems that when the existing tightening equipment has serious axial deviation, the equipment runs unstably, the rotating shaft is easy to break when vibrated, and the tightening head of the tightening equipment needs to be replaced when facing parts to be tightened of different specifications.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A flexible tightening device, comprising:

[0009] Lifting drive device; the lifting drive device is installed at a fixed position, and a moving end is provided on the lifting drive device;

[0010] The tightening drive device is fixedly mounted on the moving end of the lifting drive device;

[0011] The tightening adjustment structure is fixedly mounted on the moving end of the lifting drive device, and the power input end of the tightening adjustment structure is fixedly connected to the driving end of the tightening drive device;

[0012] Various types of passive tightening heads; a passive tightening head has a blind hole on its bottom surface that matches the edge of the component to be tightened, and a passive tightening head is sleeved on the corresponding type of component to be tightened through the blind hole provided on the passive tightening head;

[0013] Floating structure; the floating structure includes a floating joint and an active tightening head. The mounting seat of the floating joint is threadedly connected to the power output end of the tightening adjustment structure, and the axial output end of the floating joint is threadedly connected to the active tightening head. When the lifting drive device drives the floating structure to move downward, the active tightening head is connected to the passive tightening head to form a toothed clutch structure.

[0014] Preferably, the top end of the active tightening head is threadedly connected to the axial output end of the floating joint, the bottom end of the active tightening head is provided with at least two connecting protrusions, and the top end of each passive tightening head is provided with at least two connecting grooves. When the lifting drive device drives the floating structure to move downward, a connecting protrusion falls into each connecting groove.

[0015] Preferably, the flexible tightening device further comprises a connecting member, which is fixedly mounted on the moving end, and the tightening drive device and the tightening adjustment structure are both fixedly mounted on the connecting member.

[0016] Preferably, the tightening adjustment structure comprises:

[0017] Reducer; the reducer is fixedly mounted on the connecting piece, and the power input end of the reducer is fixedly connected to the power output end of the tightening drive device;

[0018] The torque sensor is fixedly mounted on the connecting piece, and the power input end of the torque sensor is fixedly connected to the power output end of the reducer;

[0019] Torque limiter; the torque limiter is fixedly installed on the connecting piece, the power input end of the torque limiter is fixedly connected to the power output end of the torque sensor, and the power output end of the torque limiter is threadedly connected to the mounting seat of the floating joint.

[0020] Preferably, the flexible tightening device further comprises a floating detection structure, which is used to detect the floating value of the floating joint in real time, and the floating detection structure comprises:

[0021] Floating detection plate; the floating detection plate is provided with a mounting through hole, and the floating detection plate is sleeved on the axial output end of the floating joint through the mounting through hole;

[0022] Displacement sensor; the displacement sensor is fixedly mounted on the connecting piece, and the sensing end of the displacement sensor points to the floating detection plate.

[0023] Preferably, the flexible tightening device further comprises a module mounting plate, one side of the module mounting plate is fixedly connected to the linear module, and the other side of the module mounting plate is fixedly connected to the mounting plane.

[0024] Preferably, the lifting drive device includes a linear module and a first servo motor. The linear module is installed in a fixed position, the driving end of the first servo motor is connected to the moving end of the linear module, and the driving direction of the lifting drive device is consistent with the moving direction of the moving end of the linear module.

[0025] Preferably, the tightening drive device is a second servo motor.

[0026] Preferably, the connecting member is a frame structure.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] The present application realizes the up and down movement of the tightening drive device and the tightening adjustment structure through a linear module and a lifting drive device. The present application also provides a floating joint, an active tightening head and a passive tightening head. When the tightening adjustment structure moves downward, the active tightening head arranged on the floating joint is connected with the passive tightening head arranged on the component to be tightened to form a toothed clutch structure. At this time, the tightening drive device is started, the tightening adjustment structure drives the floating joint to rotate, and at the same time, the active joint drives the passive tightening head fixed on the component to be tightened to rotate, thereby completing the tightening operation.

[0029] The floating joint can move freely within a certain range, compensate for the floating assembly error, ensure the alignment of the active tightening head and the passive tightening head, ensure the normal operation of the device, and reduce stress concentration, extend the service life of the device. In addition, the present application does not require the replacement of the tightening head. It is only necessary to put different types of passive tightening heads on the corresponding types of parts to be tightened. It can realize the tightening operation of parts to be tightened of different specifications on one work line without stopping, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the specific structure of this application;

[0031] Figure 2 for Figure 1 Side view of

[0032] The markings in the figure are:

[0033] 1- floating joint; 2- torque limiter; 3- torque sensor; 4- reducer; 5- tightening drive device; 6- lifting drive device; 7- linear module; 8- passive tightening head; 9- active tightening head; 10- displacement sensor; 11- connector; 12- module mounting plate; 13- floating detection plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Embodiment 1:

[0036] like Figure 1 , Figure 2 As shown, a flexible tightening device comprises:

[0037] The lifting drive device 6 is installed at a fixed position, and a moving end is provided on the lifting drive device 6;

[0038] Tightening drive device 5; the tightening drive device 5 is fixedly mounted on the moving end of the lifting drive device 6;

[0039] The tightening adjustment structure is fixedly mounted on the moving end of the lifting drive device 6, and the power input end of the tightening adjustment structure is fixedly connected to the driving end of the tightening drive device 5;

[0040] Various types of passive tightening heads 8; a passive tightening head 8 has a blind hole on its bottom surface adapted to the edge of the component to be tightened, and a passive tightening head 8 is mounted on a corresponding type of component to be tightened through its own blind hole. For example, when the object to be tightened is a triangular nut, the blind hole of the passive tightening head mounted on the triangular nut is a corresponding triangle, and when the object to be tightened is a hexagonal nut, the blind hole of the passive tightening head mounted on the hexagonal nut is a corresponding hexagon;

[0041] Floating structure; the floating structure includes a floating joint 1 and an active tightening head 9, the mounting seat of the floating joint 1 is threadedly connected to the power output end of the tightening adjustment structure, the axial output end of the floating joint 1 is threadedly connected to the active tightening head 9, when the lifting drive device 6 drives the floating structure to move downward, the active tightening head 9 is connected to the passive tightening head 8 to form a toothed clutch structure, wherein the model of the floating joint is schunk's age-s-125-xyz.

[0042] In this embodiment, the present application realizes the up and down movement of the tightening drive device 5 and the tightening adjustment structure through the lifting drive device 6. The present application also provides a floating joint 1, an active tightening head 9 and a passive tightening head 8. When the tightening adjustment structure moves downward, the active tightening head 9 provided on the floating joint 1 is connected with the passive tightening head 8 provided on the component to be tightened to form a toothed clutch structure. At this time, the tightening drive device 5 is started, the tightening adjustment structure drives the floating joint 1 to rotate, and at the same time, the active joint drives the passive tightening head 8 fixed on the component to be tightened to rotate, thereby completing the tightening operation.

[0043] The floating joint 1 can move freely within a certain range to compensate for the floating assembly error, ensure the alignment of the active tightening head 9 and the passive tightening head 8, ensure the normal operation of the device, and reduce stress concentration and extend the service life of the device. In addition, the present application does not require the replacement of the tightening head. It is only necessary to put different types of passive tightening heads 8 on the corresponding types of parts to be tightened, so that the tightening operation of parts to be tightened of different specifications can be realized on one work line without stopping.

[0044] Embodiment 2:

[0045] The difference between this embodiment and embodiment 1 is that Figure 2 As shown, the top end of the active tightening head 9 is threadedly connected to the axial output end of the floating joint 1, the bottom end of the active tightening head 9 is provided with at least two connecting protrusions, and the top end of each passive tightening head 8 is provided with at least two connecting grooves. When the lifting drive device 6 drives the floating structure to move downward, a connecting protrusion falls into each connecting groove.

[0046] Embodiment 3:

[0047] The difference between this embodiment and embodiment 1 is that Figure 1 , Figure 2 As shown, the flexible tightening device further includes a connecting member 11 , which is fixedly mounted on the moving end, and the tightening drive device 5 and the tightening adjustment structure are both fixedly mounted on the connecting member 11 .

[0048] In this embodiment, the distance between the tightening adjustment structure and the linear module 7 can be set by controlling the shape and size of the connecting member 11, so as to adapt to different production environments.

[0049] Embodiment 4:

[0050] The difference between this embodiment and embodiment 3 is that Figure 1 , Figure 2 As shown, the tightening adjustment structure includes:

[0051] The reducer 4 is fixedly mounted on the connecting member 11, and the power input end of the reducer 4 is fixedly connected to the power output end of the tightening drive device 5;

[0052] The torque sensor 3 is fixedly mounted on the connecting member 11, and the power input end of the torque sensor 3 is fixedly connected to the power output end of the reducer 4;

[0053] Torque limiter 2; the torque limiter 2 is fixedly mounted on the connecting member 11, the power input end of the torque limiter 2 is fixedly connected to the power output end of the torque sensor 3, and the power output end of the torque limiter 2 is threadedly connected to the mounting seat of the floating joint 1.

[0054] In this embodiment, the torque sensor 3 can detect the torque value in real time, and send a signal after reaching the set torque value, so that the tightening drive device 5 stops rotating. Since different types of parts to be tightened require different torques, the tightening adjustment structure can adapt to the torque of different types of parts to be tightened.

[0055] Embodiment 5:

[0056] The difference between this embodiment and embodiment 1 is that Figure 1 , Figure 2 As shown, the flexible tightening device also includes a floating detection structure, which is used to detect the floating value of the floating joint 1 in real time. The floating detection structure includes:

[0057] Floating detection plate 13; the floating detection plate 13 is provided with a mounting through hole, and the floating detection plate 13 is sleeved on the axial output end of the floating joint 1 through the mounting through hole;

[0058] Displacement sensor 10 ; the displacement sensor 10 is fixedly mounted on the connecting member 11 , and the sensing end of the displacement sensor 10 points to the floating detection plate 13 .

[0059] In this embodiment, the displacement sensor 10 can detect the floating value of the Z axis in real time through the Z axis change of the floating detection plate 13, and can calculate the actual descent height in conjunction with the linear module 7 to obtain the final tightening height, thereby determining whether the product tightening is qualified.

[0060] Embodiment 6:

[0061] The difference between this embodiment and embodiment 1 is that Figure 1 , Figure 2 As shown, the flexible tightening device further comprises a module mounting plate 12, one surface of the module mounting plate 12 is fixedly connected to the linear module 7, and the other surface is fixedly connected to the mounting plane.

[0062] Embodiment 7:

[0063] The difference between this embodiment and embodiment 1 is that Figure 1 , Figure 2As shown, the lifting drive device 6 includes a linear module 7 and a first servo motor. The linear module 7 is installed in a fixed position. The driving end of the first servo motor is connected to the moving end of the linear module 7. The driving direction of the lifting drive device 6 is consistent with the moving direction of the moving end of the linear module 7.

[0064] Embodiment 8:

[0065] The difference between this embodiment and the first embodiment is that the tightening drive device 5 is a second servo motor.

[0066] Embodiment 9:

[0067] The difference between this embodiment and embodiment 3 is that Figure 1 , Figure 2 As shown, the connecting member 11 is a frame structure.

[0068] In this embodiment, the frame structure has good stability and good heat dissipation effect, and it is convenient for operators to inspect and repair the tightening and adjusting structure at any time.

Claims

1. A flexible tightening device, characterized in that: include: Lifting drive device (6); The lifting drive device (6) is installed at a fixed position, and a moving end is provided on the lifting drive device (6); A tightening drive device (5); the tightening drive device (5) is fixedly mounted on the moving end of the lifting drive device (6); The tightening adjustment structure is fixedly mounted on the moving end of the lifting drive device (6), and the power input end of the tightening adjustment structure is fixedly connected to the driving end of the tightening drive device (5); Various types of passive tightening heads (8); a passive tightening head (8) having a bottom surface provided with a blind hole adapted to the edge of a component to be tightened, and a passive tightening head (8) being sleeved on a component to be tightened of a corresponding type through the blind hole provided therein; The floating structure comprises a floating joint (1) and an active tightening head (9), the mounting seat of the floating joint (1) is threadedly connected to the power output end of the tightening adjustment structure, the axial output end of the floating joint (1) is threadedly connected to the active tightening head (9), and when the lifting drive device (6) drives the floating structure to move downward, the active tightening head (9) is connected to the passive tightening head (8) to form a toothed clutch structure.

2. A flexible tightening device according to claim 1, characterized in that: The top end of the active tightening head (9) is threadedly connected to the axial output end of the floating joint (1), the bottom end of the active tightening head (9) is provided with at least two connection protrusions, and the top end of each passive tightening head (8) is provided with at least two connection grooves, and when the lifting drive device (6) drives the floating structure to move downward, a connection protrusion falls into each connection groove.

3. A flexible tightening device according to claim 1, characterized in that: The flexible tightening device also includes a connecting piece (11), the connecting piece (11) is fixedly mounted on the moving end, and the tightening drive device (5) and the tightening adjustment structure are both fixedly mounted on the connecting piece (11).

4. A flexible tightening device according to claim 3, characterized in that: The tightening adjustment structure includes: A reducer (4); the reducer (4) is fixedly mounted on the connecting member (11), and a power input end of the reducer (4) is fixedly connected to a power output end of the tightening drive device (5); Torque sensor (3); the torque sensor (3) is fixedly mounted on the connecting member (11), and the power input end of the torque sensor (3) is fixedly connected to the power output end of the reducer (4); The torque limiter (2) is fixedly mounted on the connecting member (11), the power input end of the torque limiter (2) is fixedly connected to the power output end of the torque sensor (3), and the power output end of the torque limiter (2) is threadedly connected to the mounting seat of the floating joint (1).

5. A flexible tightening device according to claim 1, characterized in that: The flexible tightening device also includes a floating detection structure, which is used to detect the floating value of the floating joint (1) in real time. The floating detection structure includes: A floating detection plate (13); the floating detection plate (13) is provided with a mounting through hole, and the floating detection plate (13) is sleeved on the axial output end of the floating joint (1) through the mounting through hole; The displacement sensor (10) is fixedly mounted on the connecting member (11), and the sensing end of the displacement sensor (10) points to the floating detection plate (13).

6. A flexible tightening device according to claim 1, characterized in that: The flexible tightening device also includes a module mounting plate (12), one side of the module mounting plate (12) being fixedly connected to the linear module (7), and the other side of the module mounting plate (12) being fixedly connected to the mounting plane.

7. A flexible tightening device according to claim 1, characterized in that: The lifting drive device (6) comprises a linear module (7) and a first servo motor. The linear module (7) is installed in a fixed position. The driving end of the first servo motor is connected to the moving end of the linear module (7). The driving direction of the lifting drive device (6) is consistent with the moving direction of the moving end of the linear module (7).

8. A flexible tightening device according to claim 1, characterized in that: The tightening drive device (5) is a second servo motor.

9. A flexible tightening device according to claim 3, characterized in that: The connecting member (11) is a frame structure.

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