CN111195815A - Synchronous fastening device - Google Patents
Synchronous fastening device Download PDFInfo
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- CN111195815A CN111195815A CN201811381044.8A CN201811381044A CN111195815A CN 111195815 A CN111195815 A CN 111195815A CN 201811381044 A CN201811381044 A CN 201811381044A CN 111195815 A CN111195815 A CN 111195815A
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- gear
- driving gear
- fixed shaft
- fastening device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/069—Multi-spindle machines
Abstract
The invention relates to a synchronous fastening device, in particular to an automatic device capable of simultaneously fastening a plurality of screws. Its purpose is in order to provide a simple structure, debug convenient, the reliability is high and make by the even synchronous fastener of fastener atress. The synchronous fastening device comprises a power source, a base, a fixed shaft fixedly arranged on one side of the base, a driving gear, a plurality of driven gears, a plurality of transmission shafts and fasteners, wherein the driving gear is sleeved on the fixed shaft and can rotate relative to the fixed shaft, the driven gears can be meshed with the driving gear, the transmission shafts can synchronously rotate with the driven gears, the fasteners are connected with one end parts of the transmission shafts and can synchronously move along with the transmission shafts, the fasteners are used for fastening fastened pieces, the shapes of the fasteners are matched with those of the fasteners, the power source is used for providing power for the driving gear, and the synchronous fastening device further. The device realizes synchronous screw tightening by using a single power source, and has the advantages of simple assembly and debugging, low cost, low environmental requirement and wide application range.
Description
Technical Field
The invention relates to the field of design and manufacture of transmission equipment, in particular to an automatic device capable of simultaneously fastening a plurality of screws.
Background
With the increasing progress of science and technology, various industries are continuously changed into mechanical and automatic production modes by manual operation.
Through research and study, the current screw tightening mode and sequence are basically manually screwed one by one, and then each screw is recycled and gradually tightened, but the mode of manually tightening the screws causes different effective fastening force of each screw, and when the screws are manually tightened, the control of the magnitude of the fastening force depends on experience and feeling, when the fastening force is overlarge, the deformation and the failure of the fastened piece are easily caused, particularly in the occasions of pressure tanks and thin-wall structures fastened by a plurality of screws.
The device and equipment for synchronously screwing the screws in the prior art are mainly based on the transmission of a motor, hydraulic pressure and pneumatics and are matched with a corresponding control system. The existing device and equipment have the disadvantages of complex structural composition, complex motion relation, low reliability, high requirement on environmental indexes and high price.
Disclosure of Invention
The invention aims to provide a screw synchronous fastening device which is simple in structure, convenient to debug, high in reliability and capable of enabling a fastened piece to be stressed more uniformly.
The synchronous fastening device comprises a single power source, a base, a fixed shaft fixedly arranged on one side of the base, a driving gear which is sleeved on the fixed shaft and can rotate relative to the fixed shaft, a plurality of driven gears which can be meshed with the driving gear, a plurality of transmission shafts which can synchronously rotate with the driven gears, and a fastening piece which is connected with one end part of the transmission shafts and can synchronously move along with the transmission shafts, wherein the fastening piece is used for connecting a fastened piece to fasten the fastened piece, the single power source is used for providing power for the driving gear,
still include a plurality of transition gear, fixed mounting has the gear shaft on the base, the transition gear suit is in on the gear shaft and can be relative the gear shaft rotates, transition gear respectively with the driving gear and driven gear external toothing.
The synchronous fastening device comprises a transition gear, a driving gear and a driven gear, wherein the transition gear comprises a first layer gear and a second layer gear, the first layer gear is used for being meshed with the driving gear, and the second layer gear is used for being meshed with the driven gear.
According to the synchronous fastening device, the first layer of gears and the second layer of gears are vertically arranged.
The synchronous fastening device of the invention is characterized in that the first layer gear and the second layer gear are of an integral structure or a split fixing structure.
The synchronous fastening device of the invention, wherein the driving gear can move in the axial direction relative to the fixed shaft so as to enable the driving gear to enter or disengage.
According to the synchronous fastening device, the driving gear and the fixed shaft are matched through the protrusion and the key slot to realize the movement of the driving gear relative to the fixed shaft in the axial direction.
According to the synchronous fastening device, the protrusions are arranged on the inner circumferential surface of the driving gear along the axial direction, and the key grooves are formed in the outer circumferential surface of the fixed shaft and matched with the protrusions in shape;
or the bulge is arranged on the outer peripheral surface of the fixed shaft along the axial direction, the key groove is arranged on the inner peripheral surface of the driving gear and is matched with the bulge in shape,
and the length of the key groove in the axial direction is longer than that of the protrusion so as to realize the relative movement of the protrusion and the key groove in the axial direction.
According to the synchronous fastening device, the positioning structure is arranged between the driving gear and the fixed shaft so as to fix the driving gear to a certain position when the driving gear moves upwards along the axial direction and is disengaged.
The synchronous fastening device of the invention, wherein the positioning structure is a combined structure of an elastic bump and a groove.
The synchronous fastening device of the invention is characterized in that the elastic lug is arranged on the inner peripheral surface of the driving gear, and the groove is arranged on the outer peripheral surface of the fixed shaft and is matched with the elastic lug in shape;
or the elastic lug is arranged on the outer peripheral surface of the fixed shaft, and the groove is formed in the inner peripheral surface of the driving gear and is matched with the elastic lug in shape.
According to the synchronous fastening device, the positioning structure is a first elastic plunger, one end of the first elastic plunger is fixedly installed on one outer side face of the driving gear, the fixed shaft is provided with a groove, and when the driving gear moves upwards along the axial direction until the driving gear is disengaged, the other end of the first elastic plunger can be embedded into the groove to fix the driving gear at a certain position.
The synchronous fastening device of the present invention, wherein the fastening member is detachably attached to the drive shaft.
The synchronous fastening device of the invention is different from the prior art in that the synchronous fastening device of the invention uses a single power source, a driving gear drives a plurality of driven gears to move, the synchronous fastening of a plurality of fastened pieces is realized through the meshing transmission between the gears and the synchronous rotation between the driven gears and a transmission shaft, the synchronous rotation of the fastening pieces and the transmission shaft, a transition gear is arranged, the transition gear is respectively meshed with the driving gear and the driven gears, the driving gear, the transition gear and a driven gear central gear form a speed reducing mechanism, the input torque can be reduced when the output torque is the same, thereby achieving the labor-saving effect, reducing the input of power, changing the rotation direction of the output torque to be the same as the rotation direction of the input torque, and reducing the free rotation angle of the driven gears when the driving gear and the transition gear are changed from a disengaged state to an engaged state, the error of the rotation distance of the fastened piece is smaller, and the fastened piece is stressed more uniformly. The whole device has simple structure, very simple motion relation transmission, convenient debugging and assembly, and suitability for mass production, and simultaneously has lower requirement on the environment when in use, and can be suitable for operation in various occasions; the application range is wide, and fastening of different types of fasteners can be realized; fastening efficiency is high, improves the operating efficiency.
The transition gear in the synchronous fastening device is a double-layer gear, so that transmission interference is avoided, and motion transmission is facilitated; the driving gear can move in the axial direction, so that the driving gear enters or is disengaged, and the interference of the driving gear on the positioning operation is avoided when the positioning operation is carried out on the fastening piece and the fastened piece before the fastening is carried out; the driving gear moves in the axial direction through the matching of the protrusions and the key grooves, the design is simple, and the axial movement of the driving gear is convenient; the positioning mechanism is used for fixing the driving gear at a certain position when the driving gear is disengaged, so that the axial movement of the driving gear is prevented from influencing the positioning operation of the fastener and the fastened piece; the positioning structure is a combination of the elastic lug and the groove, the driving gear is fixed through the matching of the elastic lug and the groove, and the structure is simple; the positioning structure is a first elastic plunger with one end fixed on the outer side surface of the driving gear and the other end matched with the groove on the fixed shaft, and is convenient to process and manufacture; a fixed frame is arranged, and the fixed frame and the base clamp the driven gear in the middle to limit the movement of the driven gear in the axial direction; the fastener is detachably connected to the transmission shaft so as to fasten different fastened parts, enlarge the application range of the device and change the repair and replacement of the fastener.
The synchronous fastening device of the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a driving gear engaged with a driven gear when a transition gear is not provided in the synchronous fastening device of the present invention;
FIG. 2 is a front view of the synchronous fastening device of the present invention with the driving gear disengaged from the driven gear without the transition gear;
FIG. 3 is a front view of the synchronous fastening device of the present invention with a transition gear disposed;
FIG. 4 is a front view of the synchronizing fastening device of the present invention with added protection structure;
FIG. 5 is a cross-sectional view of a second elastomeric plunger of the protective structure of the present invention within a recess of the present synchronous fastening device;
FIG. 6 is a perspective view of a drive gear of the present invention;
FIG. 7 is a cross-sectional view of a projection and keyway/resilient projection and groove of a simultaneous fastening device of the present invention in one embodiment;
FIG. 8 is a cross-sectional view showing the engagement of a protrusion with a key groove/the engagement of an elastic projection with a groove in another embodiment of the synchronous fastening device of the present invention.
The gear-type transmission mechanism comprises a base-1, a driven gear-2, a transmission shaft-3, an extension end-31, a driving gear-4, a guide surface-41, a bearing surface-42, a fixed shaft-5, a torque disc-6, a second elastic plunger-7, a free end-71, a transition gear-8, a first layer gear-81, a second layer gear-82, a gear shaft-83, a first elastic plunger-9, a fastener-10, a fixed frame-11, a pit-12, a bulge-13, a key groove-14, an elastic bump-15 and a groove-16.
Detailed Description
In the present invention, the same or similar reference numerals are used to designate the same elements throughout the several views. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the present application, "up" is an upward orientation in the axial direction, and "down" is a downward orientation in the axial direction; carrying out bearing surface: the tooth form of the middle part of the gear tooth of the gear is a standard tooth form, and one surface of the standard tooth form for bearing load is called a bearing surface; a guide surface: the two sides of the gear tooth are cutting edges, and the cutting edges are gradually transited to the two side surfaces of the standard tooth form respectively to be called as guide surfaces.
At present, the mode and sequence for screwing the screws are basically screwed one by adopting a manual mode, then each screw is recirculated and screwed gradually, but the mode of manually screwing the screws is very slow in working efficiency and causes different effective fastening force of each screw, and when the screws are manually screwed, the control of the magnitude of the fastening force depends on experience and feeling, when the fastening force is too large, the deformation and the failure of the fastened piece are easily caused, especially in the occasions of a pressure tank body and fastening a thin-wall structure by a plurality of screws, in order to solve the problems, the invention provides a synchronous fastening device, as shown in figures 1 and 2, which comprises a single power source, a base 1, a fixed shaft 5 fixedly arranged on one side of the base 1, a driving gear 4 sleeved on the fixed shaft 5 and capable of rotating relative to the fixed shaft 5, a plurality of driven gears 2 capable of externally engaging with the driving gear 4, The driving gear comprises a plurality of driving shafts 3 capable of synchronously rotating with the driven gear 2 and fasteners 10 connected with one end parts of the driving shafts 3 and capable of synchronously moving along with the driving shafts 3, the fasteners 10 are used for being connected with fastened pieces to fasten the fastened pieces, the shapes of the fasteners 10 are matched with those of the fasteners 10, and a single power source is used for providing power for the driving gear 4.
Preferably, a single power source, i.e. only one power source is required, e.g. one person or one hand is used, one motor is used instead of a plurality of motors, no electrical control is required or is particularly simple and cost-effective.
Preferably, as shown in fig. 1 and 2, the fixed shaft 5, the driving gear 4 and the driven gear 2 are all installed on the upper side of the base 1, one end of the transmission shaft 3 penetrates through the base 1 from top to bottom, and then extends downwards for a certain length to form an extending end 31, and the extending end 31 is rigidly connected with the fastening member 10 in the circumferential direction.
Preferably, to achieve gripping of fasteners 10 of different configurations or types, to expand the scope of application of the present invention, to facilitate replacement and repair of fasteners 10, fasteners 10 are removably attached to extension end 31 of drive shaft 3, such as by a threaded connection. In the present invention, the fastened member is preferably a screw.
Preferably, as shown in fig. 1, a plurality of fixing frames 11 are fixedly provided on the base 1 corresponding to the transmission shaft 3, and the fixing frames 11 and the base 1 sandwich the driven gear 2 to restrict the movement of the driven gear 2 in the axial direction. Specifically, the other end of the transmission shaft 3 corresponding to the extending end 31 penetrates through the fixing frame 11 from bottom to top, and the lower surface of the fixing frame 11 abuts against the hub of the driven gear 2, so that the fixing frame 11 and the base 1 clamp the driven gear 2.
Example 1
In the present embodiment, as shown in fig. 3, in order to reduce the input torque when the output torque is the same, thereby achieving the effect of saving labor and reducing the input of power, and to change the rotation direction of the output torque to be the same as the rotation direction of the input torque, the present invention is further provided with a plurality of transition gears 8. Specifically, a gear shaft 83 is fixedly mounted on the base 1, the transition gear 8 is sleeved on the gear shaft 83 and can rotate relative to the gear shaft 83, the transition gear 8 comprises a first layer gear 81 and a second layer gear 82 integrated with the first layer gear 81, the first layer gear 81 and the second layer gear 82 are vertically arranged, the first layer gear 81 is used for being meshed with the driving gear 4, and the second layer gear 82 is used for being meshed with the driven gear 2. The driving gear 4 is not mounted on the upper surface of the base 1, but is spaced apart from the base 1, and the driving gear 4 is fixed at a certain position by a positioning structure, such as a combination structure of an elastic protrusion 15 and a groove 16 (described later). When the driving gear 4 and the transition gear 8 are changed from a disengaged state to an engaged state, the free rotation angle of the driven gear 2 can be reduced, so that the error of the rotation distance of the fastened piece is smaller, and the fastened piece is stressed more uniformly.
Since the fastening member is usually positioned between the two before being fastened, in the positioning, it is sometimes necessary to perform a proper fine adjustment rotation on the fastening member 10 to ensure the positioning accuracy, and in the fine adjustment rotation of the fastening member 10, the driven gear 2 is also rotated, and if the driving gear 4 and the driven gear 2 are still in the engaged state, the driving gear 4 interferes with the positioning operation, so to avoid the interference, it is preferable that the driving gear 4 is capable of moving in the axial direction relative to the fixed shaft 5 to bring the driving gear 4 into or out of engagement, as shown in fig. 3, 7 and 8.
Further preferably, as shown in fig. 7 and 8, in order to realize the movement of the driving gear 4 in the axial direction, a structure that the protrusion 13 is matched with the key groove 14 is provided between the driving gear 4 and the fixed shaft 5, and the structure is simple and has high reliability.
Further preferably, in one embodiment, as shown in fig. 7, the structure of the protrusion 13 and the key groove 14 may be: the bulge 13 is arranged on the inner circumferential surface of the driving gear 4 along the axial direction, and the key groove 14 is arranged on the outer circumferential surface of the fixed shaft 5 and is matched with the bulge 13 in shape;
in another embodiment, as shown in fig. 8, the protrusion 13 and the key groove 14 are configured as follows: the protrusion 13 is arranged on the outer circumference of the fixed shaft 5 along the axial direction, the key slot 14 is arranged on the inner circumference of the driving gear 4 and is matched with the shape of the protrusion 13,
and in both embodiments, the opening length of the key groove 14 in the axial direction is greater than the arrangement length of the protrusion 13 so as to realize the relative movement of the protrusion 13 and the key groove 14 in the axial direction.
Further preferably, the combination of the protrusion 13 and the key groove 14 is provided in two sets, and the two sets are in an opposite arrangement.
Further preferably, the protrusion 13 may be integrally formed on the fixed shaft 5 or the driving gear 4, or may be separately formed and then fixedly mounted.
Further preferably, as shown in fig. 3 in combination with fig. 7 and 8, in order to realize the fixation at a certain position when the driving gear 4 is disengaged and avoid the axial movement of the driving gear 4 from affecting the positioning operation of the fastener 10 and the fastened member, a positioning structure is provided between the driving gear 4 and the fixed shaft 5.
Further preferably, as shown in fig. 7 and 8, for convenience of design while simplifying the structure, the positioning structure is a combination structure of the elastic projection 15 and the groove 16.
Further preferably, in one embodiment, as shown in fig. 7, the arrangement of the elastic protrusions 15 and the grooves 16 is as follows: the elastic lug 15 is arranged on the inner peripheral surface of the driving gear 4, and the groove 16 is arranged on the outer peripheral surface of the fixed shaft 5 and is matched with the shape of the elastic lug 15;
in another embodiment, as shown in fig. 8, the arrangement of the elastic protrusions 15 and the grooves 16 is as follows: the elastic lug 15 is arranged on the outer circumferential surface of the fixed shaft 5, and the groove 16 is opened on the inner circumferential surface of the driving gear 4 and is matched with the shape of the elastic lug 15.
Further preferably, in order to improve the reliability of the positioning, the combination structure of the elastic protrusions 15 and the grooves 16 is provided in two sets, and the two sets are in an opposite arrangement.
Further preferably, the elastic projection 15 may be integrally formed on the fixed shaft 5 or the driving gear 4, or may be separately formed and then fixedly attached.
Further preferably, for convenience of manufacture, the positioning structure is a first elastic plunger 9, one end of the first elastic plunger 9 is fixedly installed on an outer side surface of the driving gear 4, a groove is formed in the fixed shaft 5, and when the driving gear 4 moves upwards along the axial direction to be disengaged, the other end of the first elastic plunger 9 can be embedded into the groove to fix the driving gear 4 at a certain position.
The working process of the synchronous fastening device of the invention in the embodiment is as follows: before fastening a fastened piece such as a screw, firstly, positioning operation is carried out between a fastener 10 and the screw, the driving gear 4 is moved upwards along the axial direction until the driving gear 4 is disengaged from the transition gear 8, the fastener 10 is aligned with the screw, then the driving gear 4 is moved downwards along the axial direction until the driving gear 4, the transition gear 8 and the driven gear 2 are in a correct engagement state, then torque is applied to the driving gear 4 through a single power source such as a motor, the driving gear 4 rotates to drive the transition gear 8 to rotate, the transition gear 8 is in engagement transmission to transmit power to the driven gear 2, the driven gear 2 drives the transmission shaft 3 to rotate, the transmission shaft 3 rotates to transmit the torque to the fastener 10, and the fastener 10 outputs the torque to the fastened piece, so that the screw is fastened.
Example 2
The present embodiment differs from embodiment 1 in structure in that: in order to avoid the deformation of the fastened piece caused by the excessive applied torque, the invention also comprises a protection structure for the fastened piece and a protection structure for protecting the fastened piece, when the torque applied to the driving gear 4 is less than or equal to the standard torque of the fastened piece, the driving gear 4 rotates under the action of a single power source through the protection structure to realize the fastening action on the fastened piece, and when the torque applied to the driving gear 4 is greater than the standard torque required by the fastened piece, the driving gear 4 is separated from the action of the single power source through the protection structure to stop rotating, and the fastening action is not applied to the fastened piece any more.
Preferably, in order to better protect the fastened member, as shown in fig. 3-5, the protecting structure includes a torque disc 6 sleeved on the fixed shaft 5 and a second elastic plunger 7 disposed on the outer circumferential surface of the torque disc 6, the driving gear 4 is provided with a recess 12 corresponding to the second elastic plunger 7, when the torque applied to the torque disc 6 is less than or equal to the standard torque of the fastened member, the second elastic plunger 7 can be embedded into the recess 12 to realize the synchronous rotation of the driving gear 4 with the torque disc 6, and when the torque applied to the torque disc 6 is greater than the standard torque required by the fastened member, the second elastic plunger 7 can be disengaged from the recess 12, and the driving gear 4 does not rotate with the rotation of the torque disc 6. The free end 71 of the second elastic plunger 7 is matched with the pit 12, and the standard torque value required by a fastened piece can be adjusted by modifying the depth and the gradient of the pit 12, the pre-pressure of the free end 71 and the distance of the pit 12 from the axis.
Further preferably, as shown in fig. 5, in order to better realize the synchronous rotation of the torque disc 6 and the driving gear 4, one end of the second elastic plunger 7 is fixed on the outer circumferential surface of the torque disc 6, and the other end thereof is a free end 71 matched with the shape of the concave pit 12, and the free end 71 is preferably a ball head.
Preferably, in order to better ensure the synchronous rotation performance of the torque disc 6 and the driving gear 4 and ensure the accuracy of the motion transmission between the two, the torque disc 6 and the driving gear 4 are designed to be rigidly restrained in the axial direction, so that the relative positions of the two are kept unchanged. Specifically, when the driving gear 4 moves in the axial direction, the torque disc 6 moves along with the movement of the driving gear 4, and the movement of the torque disc 6 in the axial direction may be achieved by providing a structure (the specific structure is as described above) in which the protrusions 13 are engaged with the key grooves 14 on the torque disc 6.
Preferably, when the driving gear 4 moves to be disengaged, a positioning structure is provided to fix the torque disc 6 at a certain position, specifically, as shown in fig. 6, the positioning structure is a first elastic plunger 9, one end of the first elastic plunger 9 is fixedly mounted on an outer side surface of the torque disc 6, a groove is formed in a position, corresponding to the first elastic plunger 9, on the fixed shaft 5, when the torque disc 6 moves upward along the axial direction to be disengaged from the driving gear 4, the other end of the first elastic plunger 9 can be embedded into the groove to fix the torque disc 6 at a certain position, and further, the driving gear 4 is fixed at a certain position.
The working process of the embodiment is different from that of the embodiment 1 in that: the torque disc 6 acts as a single power source to power the drive gear 4, move the drive gear 4 and torque disc 6 axially upward until the drive gear 4 disengages the transition gear 8, align the fasteners 10 with the screws, then the driving gear 4 and the torque disc 6 are moved downwards along the axial direction until the driving gear 4, the transition gear 8 and the driven gear 2 are in a correct meshing state, then torque is applied to the torque disc 6, the torque disc 6 is matched with a pit 12 of the driving gear 4 through a ball head of a ball head spring to achieve synchronous rotation of the driving gear 4, the driving gear 4 rotates to drive the transition gear 8 to rotate, the transition gear 8 is meshed with the driving gear to transmit power to the driven gear 2, the driven gear 2 drives the transmission shaft 3 to rotate, the transmission shaft 3 rotates to transmit the torque to the fastener 10, and the fastener 10 outputs the torque to the fastened piece to achieve fastening of the screw.
When the torque applied to the torque disc 6 is larger than the set torque value, the ball head of the second elastic plunger 7 retracts into the plunger and is separated from the pit 12 on the driving gear 4, the torque disc 6 does not transmit the set torque to the driving gear 4 any more, the torque disc 6 rotates for a certain angle, and the ball head of the second elastic plunger 7 enters the pit 12 of the driving gear 4 again to prepare for the next use.
Example 3
The structural differences between this embodiment and embodiments 1 and 2 are: the axes of the driving gear 4 and the transition gear 8, and the axes of the transition gear 8 and the driven gear 2 are parallel to each other and staggered from each other in the axial direction, when the driving gear 4 moves towards the transition gear 8 and the driven gear 2, one of the conditions is that the inter-tooth gap of the driving gear 4 is just overlapped with the teeth of the transition gear 8, the inter-tooth gap of the transition gear 8 is just overlapped with the teeth of the driven gear 2, and the driving gear 4, the transition gear 8 and the driven gear 2 can not be engaged normally without any rotation; in another case, when the gear tooth central lines of the driving gear 4 and the transition gear 8 and the gear tooth central lines of the transition gear 8 and the driven gear 2 are overlapped in a mathematical sense, the driving gear 4 and the transition gear 8, and the transition gear 8 and the driven gear 2 cannot be meshed; in another case, the relative positions of the driving gear 4 and the transition gear 8 and the driven gear 2 during meshing are between the two cases, that is, the inter-tooth gaps of the driving gear 4 and the teeth of the transition gear 8 are staggered with each other, the center lines of the teeth of the two gears do not coincide with each other, the teeth of the transition gear 8 and the driven gear 2 are also staggered with each other, the center lines of the teeth of the two gears do not coincide with each other, and the driving gear 4, the transition gear 8 and the driven gear 2 cannot be normally meshed with each other. In view of the above three situations, in order to ensure the normal engagement between the driven gear 2 and the transition gear 8, and the transition gear 8 and the driving gear 4, and to achieve the stable and reliable engagement relationship between the driving gear 4, the transition gear 8 and each driven gear 2, the tooth profile of the tooth needs to be properly processed, in this embodiment, as shown in fig. 6, both sides of the tooth of the driving gear 4, the transition gear 8 and the driven gear 2 are guiding surfaces 41, the guiding surfaces 41 are inclined surfaces with cutting edges, and the middle is a bearing surface 42, so when the driving gear 4 and the transition gear 8, and the transition gear 8 and the driven gear 2 start to engage, when the tooth center lines of the driving gear 4 and the transition gear 8, and the transition gear 8 and the driven gear 2 are mathematically overlapped, the two cutting edges are in unstable line contact, and the cutting edges are mutually staggered through deformation, thereby becoming two inclined surface contacts, the gear is smoothly meshed under the guidance of the inclined plane, the driving gear 4 generates a torque to the transition gear 8 and the transition gear 8 generates a torque to the driven gear 2, so that each driven gear 2 rotates forwards or backwards by half the angle of the gear teeth; or when the inter-tooth gaps of the driving gear 4 and the gear teeth of the transition gear 8 and the inter-tooth gaps of the transition gear 8 and the gear teeth of the driven gear 2 are staggered and the center lines of the gear teeth of the two gears do not coincide, the driving gear 4 is directly contacted with the two guide inclined planes when meshed with the transition gear 8 and the driven gear 2, so that each driven gear 2 rotates forwards or backwards by an angle smaller than half of the gear teeth. That is, when the two sides of the teeth of the driving gear 4, the transition gear 8 and the driven gear 2 are guiding inclined planes with cutting edges, the driving gear 4, the transition gear 8 and the driven gear 2 are engaged, so that each driven gear 2 freely rotates at most a half tooth included angle, stable engagement transmission of each gear is ensured, and load transmission is borne by the bearing surface 42.
Preferably, the included angle of the ramp is less than 90 degrees, as a result of the width of the teeth.
The differences of the working process of the embodiment from the embodiment 2 and the embodiment 3 are as follows: before fastening a fastened piece such as a screw, the driving gear 4 is moved upwards along the axial direction until the driving gear 4 is disengaged from the transition gear 8, the fastener 10 is aligned with the screw, then the driving gear 4 is moved downwards along the axial direction until the driving gear 4, the transition gear 8 and the driven gear 2 are in a correct engagement state, then torque is applied to the driving gear 4 through a single power source such as a motor, the driving gear 4 rotates to drive the transition gear 8 and the driven gear 2 to rotate, the driven gear 2 drives the transmission shaft 3 to rotate, the transmission shaft 3 rotates to transmit the torque to the fastener 10, and the fastener 10 outputs the torque to the fastened piece, so that the fastening of the screw is realized.
The synchronous fastening device can fasten different fastened pieces, and simultaneously change the extension length of the extension end of the transmission shaft or the structure of the fastened piece, thereby realizing the synchronous fastening of the fastened pieces in different planes.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A synchronous fastening device, characterized in that: comprises a single power source, a base (1), a fixed shaft (5) fixedly arranged on one side of the base (1), a driving gear (4) which is sleeved on the fixed shaft (5) and can rotate relative to the fixed shaft (5), a plurality of driven gears (2) which can be meshed with the driving gear (4), a plurality of transmission shafts (3) which can synchronously rotate with the driven gears (2), and fasteners (10) which are connected with one end part of the transmission shafts (3) and can synchronously move along with the transmission shafts (3), wherein the fasteners (10) are used for connecting the fastened pieces to fasten the fastened pieces, the single power source is used for providing power for the driving gear (4),
the gear rack is characterized by further comprising a plurality of transition gears (8), a gear shaft (83) is fixedly mounted on the base (1), the transition gears (8) are sleeved on the gear shaft (83) and can rotate relative to the gear shaft (83), and the transition gears (8) are externally meshed with the driving gear (4) and the driven gear (2) respectively.
2. The synchronous fastening device of claim 1, wherein: the transition gear (8) comprises a first layer gear (81) and a second layer gear (82), the first layer gear (81) is used for being meshed with the driving gear (4), and the second layer gear (82) is used for being meshed with the driven gear (2).
3. The synchronous fastening device of claim 2, wherein: the first layer gear (81) and the second layer gear (82) are vertically arranged.
4. The synchronous fastening device of claim 2, wherein: the first layer gear (81) and the second layer gear (82) are of an integral structure or a split fixing structure.
5. The synchronous fastening device of claim 1, wherein: the driving gear (4) can move in the axial direction relative to the fixed shaft (5) to bring the driving gear (4) into or out of engagement.
6. The synchronized fastening device of claim 5, wherein: the driving gear (4) and the fixed shaft (5) are matched through a protrusion (13) and a key groove (14) to realize the movement of the driving gear (4) relative to the fixed shaft (5) in the axial direction.
7. The synchronous fastening device of claim 6, wherein: the protrusion (13) is arranged on the inner circumferential surface of the driving gear (4) along the axial direction, and the key groove (14) is formed in the outer circumferential surface of the fixed shaft (5) and is matched with the protrusion (13) in shape;
or the bulge (13) is arranged on the outer peripheral surface of the fixed shaft (5) along the axial direction, the key groove (14) is arranged on the inner peripheral surface of the driving gear (4) and is matched with the bulge (13) in shape,
and the opening length of the key groove (14) in the axial direction is greater than that of the protrusion (13) so as to realize the relative movement of the protrusion (13) and the key groove (14) in the axial direction.
8. The synchronized fastening device of claim 5, wherein: and a positioning structure is arranged between the driving gear (4) and the fixed shaft (5) so as to fix the driving gear (4) at a certain position when the driving gear moves upwards along the axial direction to be disengaged.
9. The synchronized fastening device of claim 8, wherein: the positioning structure is a combined structure of an elastic lug (15) and a groove (16), the elastic lug (15) is arranged on the inner circumferential surface of the driving gear (4), and the groove (16) is arranged on the outer circumferential surface of the fixed shaft (5) and is matched with the elastic lug (15) in shape;
or the elastic lug (15) is arranged on the outer peripheral surface of the fixed shaft (5), and the groove (16) is formed in the inner peripheral surface of the driving gear (4) and is matched with the elastic lug (15) in shape.
10. The synchronized fastening device of claim 8, wherein: the positioning structure is a first elastic plunger (9), one end of the first elastic plunger (9) is fixedly mounted on the outer side face of the driving gear (4), the other end of the first elastic plunger (9) is a free end (71), a groove is formed in the fixed shaft (5), and when the driving gear (4) moves upwards along the axial direction to be disengaged from the meshed part, the other end of the first elastic plunger (9) can be embedded into the groove to fix the driving gear (4) at a certain position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811381044.8A CN111195815B (en) | 2018-11-20 | 2018-11-20 | Synchronous fastening device |
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| CN201811381044.8A CN111195815B (en) | 2018-11-20 | 2018-11-20 | Synchronous fastening device |
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| CN111195815B CN111195815B (en) | 2021-11-30 |
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| CN112301993A (en) * | 2020-10-27 | 2021-02-02 | 上海旻悦勘察设计有限公司 | Static sounding device and static sounding method |
| CN113385927A (en) * | 2021-07-01 | 2021-09-14 | 奇瑞汽车股份有限公司 | Engine connecting rod unscrewing tool |
| CN114393394A (en) * | 2022-02-24 | 2022-04-26 | 徐州德高电动车科技有限公司 | Special dismouting device of electric tricycle integral type gearbox |
| CN115091183A (en) * | 2022-07-15 | 2022-09-23 | 芜湖翡叶动力科技有限公司 | Screw synchronous connection device and servo motor junction box mounting machine applying same |
| CN115179024A (en) * | 2022-07-06 | 2022-10-14 | 浙江久本电器有限公司 | Automatic screw twisting mechanism and automatic screw feeding machine |
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| CN115091183A (en) * | 2022-07-15 | 2022-09-23 | 芜湖翡叶动力科技有限公司 | Screw synchronous connection device and servo motor junction box mounting machine applying same |
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