CN201217145Y - Automatic screwing down apparatus - Google Patents
Automatic screwing down apparatus Download PDFInfo
- Publication number
- CN201217145Y CN201217145Y CNU2008200943180U CN200820094318U CN201217145Y CN 201217145 Y CN201217145 Y CN 201217145Y CN U2008200943180 U CNU2008200943180 U CN U2008200943180U CN 200820094318 U CN200820094318 U CN 200820094318U CN 201217145 Y CN201217145 Y CN 201217145Y
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- automatic tightening
- splined shaft
- tightening device
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Abstract
Disclosed is an automatic tightening device which mainly comprises a frame, a power mechanism arranged on the frame, a transmission mechanism which is connected with the power mechanism and is driven by the power mechanism, and a control mechanism connected with the power mechanism and the transmission mechanism. The automatic tightening device further comprises a torque force controller which is connected with the control mechanism. The transmission mechanism includes a fixture which is connected with the shell of a worm to be assembled, a rotating device connected with the fixture, a transmission device connected with the rotating device to drive the rotating device to rotate, and a thrust device which pushes the shell of the worm to be assembled to move. By making use of the power mechanism, the transmission device, the rotating device, the thrust device and the fixture, the automatic tightening device automatically tightens the shell of the worm with large torque force. The automatic tightening device is simple in structure, high in reliability and low in cost.
Description
Technical field
The utility model relates to a kind of tightening device, relates in particular to the automatic tightening device that is used for the threaded together housing.
Background technology
In the present plant equipment, most housing often needs to tighten all by being threaded.For example: being used for providing the gas generator of power to the inflation of air bag, being not only the core component of air bag, also is the generation source of air bag gas, and it comprises shell, is provided with screen pack, gas-forming agent and igniter in the shell.Wherein, shell comprises round upper casing of the metal with passage and the lower casing that electrode plug is housed, and upper casing is provided with external screw thread, and lower casing is provided with the internal thread that matches with this external screw thread.During assembling, last lower casing is spun together, constitute gas generator by being threaded.During use, gas generator is lighted gas-forming agent according to the signal that receives by igniter, produces gases at high pressure, and these gases at high pressure are gone out passage by the screen pack in the shell, and air bag is expanded rapidly, protection driver and crew's safety.Therefore, the shell of gas generator need bear bigger impulsive force, when making assembling, need guarantee to go up lower casing and be tightened reliably, and then the air bag that ensures safety plays a role rapidly accurately.
Yet, tightening lower casing needs bigger torsion, and is used to tighten the normally manual spanner of instrument of the last lower casing of air-cushion inflator at present: promptly the operator at first will go up lower casing with small wrench and screw, and use big spanner then instead and will go up lower casing and tighten, operator's labour intensity is big, efficient is low, and manually tightens lower casing, and its torsion is difficult to control, uniformity is relatively poor, the feasible effect of tightening is undesirable, and then causes easily and go up unclamping of lower casing in the use, and reliability is lower.
Publication number discloses a kind of screwing machine based on servo-drive system for " CN1603060 " name is called " based on the screwing machine of servo-drive system " in the Chinese invention patent specification, be used for bolt is realized tightening, comprise with servomotor as driving mechanism, the output mechanism of power source and be arranged at reducing gear and torque sensor between described driving mechanism and the output mechanism.Wherein, reducing gear adopts double reduction, and the first order is a planet circular system, with wheel shaft and motor direct connection, planetary gear I and sun gear and the internal gear engagement of sun gear, is output with the planet carrier.The second level is few tooth difference transmission, by as eccentric shaft, the fixed internal gear II of power shaft, be installed on the eccentric shaft and form planet circular system with the planetary gear II of internal gear II engagement, form output mechanism by described planetary gear II with the output shaft that is fixed on the support disk, support disk is by bearing pin II and planetary gear II interlock.Sensor outer housing connects firmly on internal gear II, and its strain axis stretches out at two ends, output direct connection in an end and the reducing gear, the spline housing direct connection of importing as rotation in the other end and the output mechanism.Yet this tightening machine cost is higher, the structure more complicated, and, since adopt servomotor as power source and gear graduation as reducing gear, big torsion can't be provided.
The utility model content
The technical problems to be solved in the utility model provides a kind of reliability height, with low cost, simple in structure, automatic tightening device that big torsion can be provided.
Goal of the invention of the present utility model is achieved through the following technical solutions:
A kind of automatic tightening device, mainly comprise frame, be arranged at the actuating unit on the described frame, be connected with described actuating unit, transmission mechanism by described actuating unit drive, and the controlling organization that is connected with transmission mechanism with described actuating unit, described automatic tightening device also comprises the Torque Controller that is connected with described controlling organization, described transmission mechanism comprises the clamping device that is connected with screw shell to be assembled, the tumbler that is connected with described clamping device, be connected with described tumbler, drive the transmission device that it rotates, and promote the thrust unit that screw shell to be assembled is done motion.
Above-mentioned automatic tightening device, wherein: described clamping device comprises the electric chuck of clamping screw shell upper casing to be assembled, described electric chuck comprises fixed mount, be arranged on the torque motor on the described fixed mount, the gear train that is connected with described torque motor, the driving-disc that is connected with described gear train, with the claw that described driving-disc is connected, described claw is provided with the spring contact that the passage with screw shell upper casing to be assembled matches.
Above-mentioned automatic tightening device, wherein: the male splined shaft that described tumbler comprises female splined shaft and is arranged in the described female splined shaft, cooperates with described female splined shaft; The bottom of described male splined shaft is connected with described electric chuck; Be provided with bearing between the top of described male splined shaft and the described thrust unit, the outer ring of described bearing is connected with described thrust unit, and its inner ring is connected with described male splined shaft.
Above-mentioned automatic tightening device, wherein: described frame is provided with the electric supply installation that electrically connects with described torque motor, and described female splined shaft caves inward and forms the groove of using for described electric supply installation cabling.
Above-mentioned automatic tightening device, wherein: described electric supply installation comprises the power supply disk that is connected with described female splined shaft, described power supply disk is provided with the power supply slideway, be connected with the power supply cylinder that is connected, does linear reciprocating motion with described controlling organization on the described frame, be connected with contact supporting on the described power supply cylinder, described contact supporting is provided with the power contacts that contacts with described power supply slideway.
Above-mentioned automatic tightening device, wherein: described transmission device comprises the driving wheel that is connected with described dynamic structure, the driven pulley that is connected with described female splined shaft, and be arranged at conveyer belt between described driving wheel and the driven pulley.
Above-mentioned automatic tightening device, wherein: the band decelerator motor that power is provided and the power that is provided is slowed down is provided described actuating unit; Described Torque Controller comprises the torque force limiting device that is arranged between described band decelerator motor output shaft and the transmission device, and is arranged on the described frame, closes on the torsion torque sensor at torque force limiting device place.
Above-mentioned automatic tightening device, wherein: described clamping device also comprises the anchor clamps of clamping screw shell lower casing to be assembled; Also be provided with the magazine of carrying screw shell to be assembled on the described frame, and an end is connected with described controlling organization, the other end is connected, drives the feeding cylinder that it moves reciprocatingly with described magazine.
Above-mentioned automatic tightening device, wherein: described thrust unit is connected with described anchor clamps; Described tumbler is a power transmission shaft, and its output is connected with described electric chuck; Described transmission device is a gear train; Described Torque Controller is a microswitch, is arranged on the described power transmission shaft or on the claw.
Above-mentioned automatic tightening device, wherein: close on the electric chuck place on the described frame and also be provided with the laser detector that is connected with described controlling organization.
Automatic tightening device of the present utility model by actuating unit and transmission device, provides big torsion, and, by Torque Controller, tumbler and clamping device are tightened gas generator automatically, and what guarantee gas generator screws the torsion unanimity, simple in structure, the reliability height, with low cost.Again, by the spring contact that is provided with on the claw, make electric chuck effectively clamp the upper casing of gas generator, and electric supply installation is by being arranged on groove on the female splined shaft to the power supply of electric chuck, reduce the conductor length between electric supply installation and the torque motor, and, guarantee that by controlling organization claw is promptly or when unclamping the upper casing of gas generator, electric chuck can not rotate, and has avoided the wearing and tearing of power contacts when the rotation of power supply disk.In addition, in the rundown process, detect the height of gas generator, guarantee that gas generator satisfies matching requirements, will tighten, thickness measuring (thickness measuring refers to detect the height of gas generator) operation integrates, and improves efficiency of assembling by laser detector.
Description of drawings
In order to be easy to explanation, the utility model is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is the half section structural representation of the automatic tightening device of the utility model better embodiment;
Fig. 2 is the A portion structure for amplifying schematic diagram of Fig. 1.
The specific embodiment
Figure 1 shows that the half section structural representation of the automatic tightening device of the utility model, please consult Fig. 2 simultaneously, be the A portion structure for amplifying schematic diagram of Fig. 1.Automatically tightening device comprises frame 10, be arranged on the frame, be used for providing the actuating unit (figure does not indicate) of power, be connected with actuating unit, drive the transmission mechanism that it tightens screw shell (not shown) to be assembled by actuating unit, be connected, be used to control the controlling organization of actuating unit and transmission mechanism work with transmission mechanism with actuating unit, and the Torque Controller that is connected, is used to control torsion with controlling organization.In the present embodiment, screw shell to be assembled is the gas generator of air bag, and it comprises round upper casing of the metal with passage and the lower casing that electrode plug is housed, and upper casing is provided with external screw thread, and lower casing is provided with the internal thread that matches with this external screw thread.
In the present embodiment, be provided with control program PLC able to programme in the controlling organization, this controlling organization also can be used known other controlling organizations with programmable functions instead certainly, as: industrial computer, single-chip microcomputer, microcomputer or the like repeat no more here.
Transmission mechanism comprises the clamping device that is connected with screw shell to be assembled, the tumbler 31 that is connected with described clamping device, be connected, drive its transmission device that rotates 33 with tumbler 31, and be used to promote the thrust unit 32 that screw shell to be assembled is done motion.Wherein, clamping device comprises the electric chuck 30 of clamping screw shell upper casing to be assembled and the anchor clamps 37 of clamping screw shell lower casing to be assembled.Thrust unit 32 is arranged at a non-adjacent end of tumbler 31 and electric chuck 30.The male splined shaft 312 that tumbler 31 comprises female splined shaft 311 and is arranged in the female splined shaft 311, cooperates with female splined shaft 311.The bottom of male splined shaft 312 is connected with electric chuck 30, is provided with bearing 34 between its top and the thrust unit 32.The outer ring of bearing 34 is connected with thrust unit 32, and its inner ring is connected with male splined shaft 312.In the present embodiment, thrust unit 32 is a cylinder.Bearing 34 is used to avoid cylinder to rotate with tumbler 31, and then reduces the wearing and tearing of cylinder piston.
In other embodiment of the utility model, electric chuck 30 also can replace with manipulator, repeats no more here.
Also be provided with the electric supply installation 35 that electrically connects with torque motor 301 on the frame 10, and female splined shaft 311 caves inward and forms the groove (not shown) of using for the electric supply installation cabling.Adopt the structure of groove, help reducing the lead (not shown) length between electric supply installation 35 and the torque motor 301.Electric supply installation 35 comprises the power supply disk 351 that is connected with female splined shaft 311, power supply disk 351 is provided with power supply slideway (not shown), be connected with the power supply cylinder 352 that is connected, does linear reciprocating motion with controlling organization on the frame 10, be connected with contact supporting 353 on the power supply cylinder 352, contact supporting 353 is provided with the power contacts 354 that contacts with the slideway of powering.In the present embodiment, the quantity of power contacts 354 is 4, insulation each other, and the quantity of power supply slideway is consistent with the quantity of power contacts 354, and in addition, the power supply slideway is circular, and coaxial with female splined shaft 311, its material is a Copper Foil.
In the present embodiment, power supply cylinder 352 is under the control of controlling organization, do descending motion, drive with the power contacts 354 of its interlock and do descending motion, contact with the power supply slideway on the power supply disk 351, form path, give torque motor 301 power supplies by the lead (not shown) in the conduit, torque motor 301 is according to the indication of controlling organization, control claw 304 promptly or unclamp.In the present embodiment, just transferring to promptly of torque motor 301 is reversed to and unclamps.And the shift length of firmly grasping or unclamping of claw 304 can be adjusted by the control program able to programme in the controlling organization.And,, can guarantee that claw 304 is promptly or when unclamping the upper casing of gas generator, electric chuck 30 can not rotate, and has avoided the wearing and tearing of power contacts 354 when 351 rotations of power supply disk by the control of the control program able to programme in controlling organization claw 304.Close on power supply cylinder 352 places again, on the frame 10, and also be provided with the displacement transducer (not shown) that is used to detect power supply cylinder 352 shift motions.
In the present embodiment, tightening device is whenever finished an assembly work automatically, and power supply cylinder 352 needs work three times.Say in detail, when power supply cylinder 352 descends for the first time, the upper casing of electric chuck 30 pre-chucking gas generators, that is, partial spring contact 305 does not snap in the upper casing passage, is in compressive state.Afterwards, the rotation of electric chuck 30 crawls in the crawl rotary course, slips in the gas generator upper casing passage spring contact 305 that does not snap in the pore automatically, and power supply cylinder 352 descends for the second time, beginning secondary chucking.Behind the secondary chucking, gas generator is tightened in electric chuck 30 rotations.At last, power supply cylinder 352 descends for the third time, makes torque motor 301 begin counter-rotating, and claw 304 unclamps gas generator, finishes and tightens.
In addition, also be provided with the bearing block 36 that is used for fixing female splined shaft 311 on the frame 10, help male splined shaft 312 under the promotion of thrust unit 32, in female splined shaft 311, do elevating movement.And, close on electric chuck 30 places on the frame 10 and also be provided with controlling organization the laser detector (not shown) that is connected, is used to detect screw shell height to be assembled.In the present embodiment, laser detector is the reflection-type laser sensor, in the course of work of automatic tightening device, after the reflection-type laser sensor detects gas generator and is tightened preset height, to send control signal and give controlling organization, controlling organization control actuating unit shuts down.
In other embodiment of the utility model, laser detector also can be correlation type laser sensor.
Actuating unit comprises and is used to provide power, and the band decelerator motor 20 that the power that is provided is slowed down.Torque Controller comprises the torque force limiting device 21 that is arranged between band decelerator motor 20 output shafts and the transmission device 33, and is arranged on the frame 10, closes on torque force limiting device 21 places, is used to detect the torsion torque sensor (not shown) that torque force limiting device 21 reaches default torsion.In the specific embodiment, the mechanical device that torque force limiting device 21 skids for safety, comprise ball in it, when with the device of torque force limiting device 21 interlock, when for example transmission device 33 skids, ball in the torque force limiting device 21 skids off ball orbit, with the lid jack-up on this track, in other words, tightening device reaches default torsion automatically, torsion torque sensor detect this lid by jack-up after, send restricting signal and give controlling organization.Therefore, automatically tightening device is by torque force limiting device 21, and torsion torque sensor and controlling organization can be controlled the torsion of screw shell to be assembled.
In other embodiment of the utility model, band decelerator motor 20 also can be connected for motor that power is provided and with this motor, discrete the forming of deceleration device that the power that is provided is slowed down is provided.Certainly, this deceleration device also can omit, and repeats no more here.
Be with also to be provided with between decelerator motor 20 output shafts and the torque force limiting device to be used to make temporary transient separation of output shaft and oncoming clutch (not shown), adopt the structure of clutch, help the installation of transmission device 33.
In the utility model, automatically tightening device also comprises the magazine (not shown) that is used to carry screw shell to be assembled, one end is connected with controlling organization, the other end is connected, drives its feeding cylinder that moves reciprocatingly 38 with magazine, is arranged at the product detection sensor (not shown) that is connected on the casing 10, with controlling organization and is arranged at anchor clamps 37 times, the optoelectronic switch (not shown) that is connected with controlling organization.Wherein, product detection sensor is used to detect whether product is arranged in the magazine.Optoelectronic switch is used to detect whether magazine is arranged in the anchor clamps 37.
In other embodiment of the utility model, also be provided with at least one counter wheel group between driving wheel 331 and the driven pulley 332, frame is provided with the power transmission shaft that is used for fixing the counter wheel group, and this counter wheel group comprises and first drive of driving wheel 331 transmissions and second drive coaxial with first drive.
After starting automatic tightening device, product detection sensor detects when gas generator to be assembled is arranged in the magazine, transmit and push signal to controlling organization, controlling organization control feeding cylinder will be sent in the anchor clamps 37 with the gas generator of assembling, electric chuck 30 begins to descend, tighten by secondary, band decelerator motor 20 output speeds are less, the torsion that moment is bigger, drive with the coaxial driving wheel 331 of torque force limiting device 21 and rotate, driving wheel 331 is through conveyer belt, rotatablely moving of low speed passed to driven pulley 332, do rotation periodically with the female splined shaft 311 that driven pulley 332 is coaxial, thereby drive the rotation of the male splined shaft 312 in the female splined shaft 311 in being engaged on, and then make the electric chuck 30 that is connected male splined shaft 312 bottoms drive the upper casing rotation of gas generators.Because the gas generator lower casing is fixed by anchor clamps 37, thereby has realized tightening of gas generator.
When the torsion of gas generator reaches default torsion, main pulley 331 skids, ball skids off in the torque force limiting device 21, after torsion torque sensor detects, send restricting signal and give controlling organization, simultaneously, in rundown process, laser detector scans the product height, whether the height that detects gas generator by controlling organization is qualified, after gas generator reaches qualified height, a stop signal is provided for the Programmable Logic Controller in the controlling organization, electric chuck stops the rotation, and finishes the assembling of gas generator.At last, controlling organization is by controlling the upper casing that electric chuck 30 unclamps gas generator, and electric chuck 30 is along with power supply cylinder 352 resets, and feeding cylinder 38 will be finished the gas generator of assembling and send.
Therefore, automatic tightening device of the present utility model is by actuating unit and transmission device 33, big torsion is provided, and, by Torque Controller, tumbler 31, electric chuck 30 and anchor clamps 37, gas generator is tightened automatically, and what guarantee gas generator screws the torsion unanimity, simple in structure, the reliability height, with low cost.Again, by the spring contact 305 that is provided with on the claw 304, make electric chuck 30 effectively clamp the upper casing of gas generator, and electric supply installation 35 is by being arranged on groove on the female splined shaft 311 to the power supply of electric chuck 30, reduce the conductor length between electric supply installation 35 and the torque motor 301, and, guarantee that by controlling organization claw 304 is promptly or when unclamping the upper casing of gas generator, electric chuck 30 can not rotate, and has avoided the wearing and tearing of power contacts 354 when 351 rotations of power supply disk.In addition, in rundown process, detect the height of gas generator, guarantee that it satisfies matching requirements by laser detector, and, will tighten, thickness measuring (thickness measuring refers to detect the height of gas generator) operation integrates, and improves efficiency of assembling.
The specific embodiment of the above is a better embodiment of the present utility model, be not to limit concrete practical range of the present utility model with this, scope of the present utility model comprises and is not limited to this specific embodiment, for example, thrust unit 32 directly is connected with anchor clamps 37, and the lower casing that drives gas generator moves; When automatic tightening device with especially big screw tightening to stationary device the time, anchor clamps 37 can omit; Transmission device 31 is power transmission shaft or male splined shaft, and its output is connected with electric chuck 30; Deceleration device 33 is a gear train, and one of them gear in this gear train is connected with band decelerator motor 20 output shafts; Torque Controller can be a microswitch also, is arranged on power transmission shaft or the claw 304, gives controlling organization as long as can send restricted information after satisfying gas generator and being tightened, and controlling organization control actuating unit stops output and gets final product; The equivalence variation that all shapes according to the utility model, structure are done all comprises in the protection domain of the present utility model.
Claims (10)
1. automatic tightening device, mainly comprise frame, be arranged at the actuating unit on the described frame, be connected with described actuating unit, transmission mechanism by described actuating unit drive, and the controlling organization that is connected with transmission mechanism with described actuating unit, it is characterized in that: described automatic tightening device also comprises the Torque Controller that is connected with described controlling organization, described transmission mechanism comprises the clamping device that is connected with screw shell to be assembled, the tumbler that is connected with described clamping device, be connected with described tumbler, drive the transmission device that it rotates, and promote the thrust unit that screw shell to be assembled is done motion.
2. automatic tightening device according to claim 1, it is characterized in that: described clamping device comprises the electric chuck of clamping screw shell upper casing to be assembled, described electric chuck comprises fixed mount, be arranged on the torque motor on the described fixed mount, the gear train that is connected with described torque motor, the driving-disc that is connected with described gear train, with the claw that described driving-disc is connected, described claw is provided with the spring contact that the passage with screw shell upper casing to be assembled matches.
3. automatic tightening device according to claim 2 is characterized in that: the male splined shaft that described tumbler comprises female splined shaft and is arranged in the described female splined shaft, cooperates with described female splined shaft; The bottom of described male splined shaft is connected with described electric chuck; Be provided with bearing between the top of described male splined shaft and the described thrust unit, the outer ring of described bearing is connected with described thrust unit, and its inner ring is connected with described male splined shaft.
4. automatic tightening device according to claim 3 is characterized in that: described frame is provided with the electric supply installation that electrically connects with described torque motor, and described female splined shaft caves inward and forms the groove of using for described electric supply installation cabling.
5. automatic tightening device according to claim 4, it is characterized in that: described electric supply installation comprises the power supply disk that is connected with described female splined shaft, described power supply disk is provided with the power supply slideway, be connected with the power supply cylinder that is connected, does linear reciprocating motion with described controlling organization on the described frame, be connected with contact supporting on the described power supply cylinder, described contact supporting is provided with the power contacts that contacts with described power supply slideway.
6. automatic tightening device according to claim 3, it is characterized in that: described transmission device comprises the driving wheel that is connected with described dynamic structure, the driven pulley that is connected with described female splined shaft, and be arranged at conveyer belt between described driving wheel and the driven pulley.
7. automatic tightening device according to claim 6, it is characterized in that: the band decelerator motor that power is provided and the power that is provided is slowed down is provided described actuating unit, described Torque Controller comprises the torque force limiting device that is arranged between described band decelerator motor output shaft and the transmission device, and is arranged on the described frame, closes on the torsion torque sensor at torque force limiting device place.
8. automatic tightening device according to claim 2 is characterized in that: described clamping device also comprises the anchor clamps of clamping screw shell lower casing to be assembled; Also be provided with the magazine of carrying screw shell to be assembled on the described frame, and an end is connected with described controlling organization, the other end is connected, drives the feeding cylinder that it moves reciprocatingly with described magazine.
9. automatic tightening device according to claim 8 is characterized in that: described thrust unit is connected with described anchor clamps; Described tumbler is a power transmission shaft, and its output is connected with described electric chuck; Described transmission device is a gear train; Described Torque Controller is a microswitch, is arranged on the described power transmission shaft or on the claw.
10. according to any described automatic tightening device of claim 1 to 9, it is characterized in that: close on the electric chuck place on the described frame and also be provided with the laser detector that is connected with described controlling organization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200943180U CN201217145Y (en) | 2008-05-30 | 2008-05-30 | Automatic screwing down apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200943180U CN201217145Y (en) | 2008-05-30 | 2008-05-30 | Automatic screwing down apparatus |
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|---|---|
| CN201217145Y true CN201217145Y (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200943180U Expired - Lifetime CN201217145Y (en) | 2008-05-30 | 2008-05-30 | Automatic screwing down apparatus |
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| CN (1) | CN201217145Y (en) |
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