CN210651277U - Locking structure, prestressed tendon tensioning and maintaining component and tensioning device - Google Patents
Locking structure, prestressed tendon tensioning and maintaining component and tensioning device Download PDFInfo
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- CN210651277U CN210651277U CN201921001571.1U CN201921001571U CN210651277U CN 210651277 U CN210651277 U CN 210651277U CN 201921001571 U CN201921001571 U CN 201921001571U CN 210651277 U CN210651277 U CN 210651277U
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Abstract
The utility model discloses a locking structure, prestressing tendons stretch-draw retaining member and tensioning equipment, this locking structure include the helical gear nut and can rather than the meshed helical gear, the helical gear nut is used for threaded connection on treating locking part, helical gear nut axis and helical gear axis have the contained angle, the contained angle is greater than 0 and less than or equal to 90, the helical gear is used for driving the helical gear nut to rotate, its axial displacement can be followed to the helical gear. This structure can guarantee helical gear and helical gear nut initial alignment and the wrong commentaries on classics of helical gear nut revolve, can make helical gear nut revolve soon break away from the engaged state after target in place and do not continue to twist into again, greatly reduced helical gear nut and treat the wearing and tearing of locking part upper thread and the wearing and tearing of the teeth of a cogwheel on helical gear nut and the helical gear, reached good screwing up and guaranteed the life of each part when locking the efficiency, the number of times and use cost of changing have been reduced, this locking structure's simple structure, high durability and convenient use, and is effectual.
Description
Technical Field
The utility model relates to a rail transit technical field, in particular to locking structure, prestressing tendons stretch-draw retaining member, implementation method and tensioning equipment.
Background
In the prior production process of the high-speed rail plate, both a pre-tensioning method and a post-tensioning method adopt manual single tensioning prestressed reinforcements, as shown in figure 1, the end parts of a plurality of prestressed reinforcements arranged in a rail plate mould 1 are connected with tensioning rods 2, and the tensioning rods 2 extend out of the outer side of the wall of the rail plate mould 1, so that the tensioning degrees of all the prestressed reinforcements on the rail plate mould 1 are different, and the performance of the rail plate is influenced or even the rail plate is scrapped; in order to overcome the problems and improve the automation level of track slab production, a track slab unit flow production line is adopted at present, as shown in fig. 2, all prestressed reinforcements on one side of a track slab are integrally and synchronously tensioned by a tensioning machine 3, and after the prestressed reinforcements are tensioned in place, a tensioning anchoring part is arranged between a tensioning rod 2 and the wall of a track slab mold 1 to keep the tensioning state.
The Chinese patent application with publication number CN109262827A discloses a tensioning holding structure for prestressed tendons of prefabricated track slabs, wherein a tensioning rod is provided with an external thread section, the external thread section is provided with a nut driven by a friction wheel or a nut driven by a gear, after the prestressed tendons are tensioned, the driving nut is close to and attached to the outer wall of a track slab mold to keep the tensioning state of the prestressed tendons, thus overcoming the prestress loss possibly caused by the original locking mode of an anchoring slab and ensuring the tensioning of the track slab to be qualified, but the existing structure which uses the nut locking mode to keep the tensioning including the above patent applications still has the rotation trend of the driving nut after the nut is attached to the outer wall of the track slab mold, causing the serious abrasion of the external thread section and the nut, or the friction wall failure of the friction wheel, or the abrasion of the gear, and the like, so that the tension rod and the tension maintaining structure need to be replaced frequently, and the cost is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exist among the prior art, provide a locking structure, prestressing tendons stretch-draw retaining member, realization method and tensioning equipment.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
the utility model provides a locking structure, includes helical gear nut and can rather than the helical gear of meshing, helical gear nut is used for threaded connection on treating the locking part, helical gear nut axis with the helical gear axis has the contained angle, the contained angle is greater than 0 and is less than or equal to 90, the helical gear is used for the drive helical gear nut rotates, helical gear can be followed its axial displacement.
The helical gear nut is a round nut with internal threads, and helical teeth are arranged on the outer wall of the round nut.
The locking structure is realized in such a way that the helical gear nut and the helical gear rotate in a meshed manner, the helical gear nut rotates towards the part to be locked along the axial direction of the helical gear nut, when the helical gear nut is attached to the part to be locked, namely, the helical gear nut stops rotating after reaching a locking state, as the helical gear is still in a rotating state, helical teeth on the helical gear have acting force on helical tooth grooves on the helical gear nut or helical tooth grooves on the helical gear to helical teeth on the helical gear nut, helical tooth grooves on the helical gear nut have reaction force on helical teeth on the helical gear or helical teeth on the helical gear nut, and under the reaction force, the helical teeth on the helical gear move along the helical tooth grooves on the helical gear nut, so that the helical gear moves along the axial direction of the helical gear at the same time, and the helical gear nut and the helical gear are dislocated and are not in an engaged state any more.
By adopting the locking structure of the utility model, the helical gear can drive the helical gear nut to rotate, the helical gear nut rotates to and is screwed on the part to be locked, the helical gear nut stops rotating, the helical gear moves along the self axial direction while continuing to rotate along the self axial line, so that the helical gear and the helical gear nut are separated from the meshing state, the helical gear nut can be ensured to be screwed initially, the helical gear nut can be screwed in place and then separated from the meshing state without further screwing, the wear of the helical gear nut and the part to be locked and the wear of the helical gear nut and the gear teeth on the helical gear are greatly reduced, the service life of each part is prolonged while good screwing efficacy is achieved, the replacement times and the use cost are reduced, and the noise is reduced, the locking structure is simple in structure, convenient to use and good in effect.
Preferably, the helical gear nut axis and the helical gear axis are arranged perpendicular to each other.
The utility model also provides a prestressing tendons stretch-draw holding member, include as above arbitrary one a locking structure, helical gear nut is used for threaded connection in the external screw thread section of stretch-draw pole.
The prestressed reinforcement tensioning and maintaining component can be used for prefabricating a track plate, the tensioning rod is connected to the end part of a prestressed reinforcement, and after the prestressed reinforcement is tensioned, the length of the external thread section on the tensioning rod meets the stroke of the helical gear nut, so that the helical gear nut is rotationally attached to the wall of a track plate mold; for example, after the prestressed reinforcement is tensioned, the external thread section is still arranged on the mold wall of the track slab, so that the helical gear nut can directly rotate and adhere to the mold wall of the track slab; if the external thread section exceeds the track plate mold wall after the prestressed reinforcement is tensioned, namely a rod section is arranged between the track plate mold wall and the external thread section, one side of the helical gear nut close to the track plate mold wall is connected with a sleeve, and the sleeve can be attached to the track plate mold wall after the helical gear nut rotates along the external thread section; therefore, the external thread section has enough length to meet the requirement that the helical gear nut is attached to the wall of the track plate mold in a rotating mode.
Adopt a prestressing tendons stretch-draw holding member, the helical gear nut is in the locking does not rotate the back in the external screw thread section, the helical gear is relative immediately helical gear nut gets into the state of skidding, helical gear nut with the helical gear is no longer meshed, makes helical gear's continuation rotation can not drive again helical gear nut rotates, can guarantee helical gear nut's locking can guarantee again helical gear with helical gear nut is unlikely to continue to pass the power work, causes its damage, greatly reduces external screw thread section helical gear nut with helical gear's wearing and tearing have increased stretch-draw rod's life can satisfy the firm locking after the prestressing tendons stretch-draw, prevents prestressing loss, this prestressing tendons stretch-draw holding member simple structure, convenient to use, it is respond well.
Preferably, the tensioning holding component further comprises a rotating shaft, the helical gear is sleeved on the rotating shaft in a sliding manner, and the rotating shaft can drive the helical gear to rotate.
Further preferably, the rotating shaft is a spline shaft, and the helical gear is provided with a hole matched with the spline shaft.
By adopting the structure, the spline shaft can provide good torque for the helical gear, the rotation requirement of the helical gear is met, and meanwhile the requirement of the helical gear for axial movement along the spline shaft can be well met.
Further preferably, the rotating shaft is an optical shaft, a key groove is formed in the optical shaft, a key is arranged in the key groove, a hole matched with the optical shaft and the key is formed in the helical gear, and the length of the key meets the stroke requirement of the helical gear.
Preferably, the tensioning holding part further comprises a base and a first driving assembly arranged on the base, the rotating shaft is arranged on the base and connected to an output end of the first driving assembly, and the first driving assembly is used for driving the rotating shaft to rotate.
Further preferably, the first drive assembly comprises a pneumatic motor, and the rotating shaft is connected to an output end of the pneumatic motor.
Further preferably, the first driving assembly comprises a first motor, and the rotating shaft is connected to an output end of the first motor.
Further preferably, the first motor is a stepping motor or a servo motor.
Further preferably, the first driving assembly further comprises a first speed reducer, the first motor is connected with the first speed reducer, and the rotating shaft is connected to an output end of the first speed reducer.
Preferably, the tensioning and holding part further comprises a sliding rail, the base is slidably fitted on the sliding rail, and the second driving component is connected with the base and drives the base to move along the sliding rail.
Further preferably, the second driving assembly comprises a second motor, a hydraulic cylinder or an air cylinder.
When the second driving assembly is preferably an air cylinder as a driving source, the second driving assembly is a weak-pushing flexible driving mechanism relative to motor driving or hydraulic cylinder driving due to strong air compressibility, and can retract to a certain extent when the helical gear nut and the helical gear are in hard contact with each other, so that the helical gear nut and the helical gear are protected to a certain extent.
Further preferably, the second motor is a stepping motor.
Further preferably, when the second driving assembly comprises a second motor, the second driving assembly further comprises a second speed reducer and a transmission rod, the second motor is connected with the second speed reducer, the second speed reducer is connected with the transmission rod, and the transmission rod is used for driving the base to move along the sliding rail.
Preferably, the tension maintaining member further includes an elastic mechanism, one end of the elastic mechanism in an elastic direction thereof abuts against the base, and the other end of the elastic mechanism abuts against one end surface of the helical gear, and the elastic mechanism is configured to provide a restoring force to the helical gear moving along the rotation shaft.
By adopting the structure, on one hand, the helical gear moves along the rotating shaft so as to be dislocated with the helical gear nut after the helical gear nut is attached to the mold wall of the track plate, so that the helical gear is not driven to rotate any more by the rotation of the helical gear, meanwhile, the helical gear moves to compress the elastic mechanism, the elastic mechanism pushes the helical gear back, so that the helical gear continues to provide certain force to the helical gear nut by the rotation of the helical gear so as to enable the helical gear nut to be tightened, the helical gear continues to move along the rotating shaft after the helical gear nut is locked, so that the helical gear repeatedly jumps back and forth relative to the helical gear nut, namely, the helical gear nut can be locked by the elastic mechanism, on the other hand, after the helical gear is driven by the base to be far away from the helical gear nut, the elastic mechanism resets the helical gear to an initial position for the next operation.
Further preferably, the elastic mechanism is a spring.
Further preferably, the spring is sleeved on the rotating shaft.
The utility model also provides a prestressed reinforcement stretch-draw implementation method who keeps, use as above stretch-draw keeps the part, including following step:
A. pulling the tension rod to drive the prestressed reinforcement to be tensioned;
B. the first driving assembly drives the rotating shaft to rotate so as to enable the helical gear to rotate, and the second driving assembly drives the base to move along the sliding rail so as to enable the helical gear to lean against the helical gear nut;
C. the helical gear is meshed with the helical gear nut, and the helical gear nut rotates along the external thread section and is screwed to the wall of the track plate mold;
D. the helical gear nut is attached to the wall of the track slab die, the helical gear nut stops rotating, the helical gear is in a rotating state, and helical teeth on the helical gear move along a helical tooth groove on the helical gear nut, so that the helical gear simultaneously moves along the axial direction of the rotating shaft and compresses the elastic mechanism;
E. after the helical gear axially moves along the rotating shaft, the helical gear and the helical gear nut are staggered, and the meshing state is removed, namely the helical gear slips relative to the helical gear nut;
F. the second driving assembly drives the base to move along the sliding rail, so that the helical gear is far away from the helical gear nut, and the helical gear is reset along the axial movement of the rotating shaft under the action of the restoring force of the elastic mechanism.
Adopt a realization method that prestressing tendons stretch-draw kept, helical gear nut follows the external screw thread section is laminated behind track slab mould wall, the helical gear is relative immediately helical gear nut gets into the state of skidding, helical gear nut with the helical gear is no longer meshed, makes helical gear's continuation rotation can not drive again helical gear nut rotates, can guarantee helical gear nut's locking, can guarantee again helical gear with helical gear nut is unlikely to continue to pass the power work, causes its damage, greatly reduces external screw thread section helical gear nut with the wearing and tearing of helical gear have increased stretch-draw rod's life can satisfy firm locking behind the prestressing tendons, prevents the loss of stretch-draw prestressing, and this method step is simple, and it is convenient to realize, and is respond well.
The utility model also provides a tensioning equipment of prestressing tendons, including at least one as above arbitrary one the stretch-draw keeps the part, every stretch-draw keeps the part to correspond one stretch-draw pole and a stretch-draw part, every stretch-draw part is used for the pulling stretch-draw pole, stretch-draw promptly prestressing tendons accomplishes every after the stretch-draw in the stretch-draw keeps in the part helical gear nut is used for laminating in track slab mould wall.
By adopting the prestressed tendon tensioning device of the utility model, under the condition that the positions of the helical gear nuts sleeved on the initial threads of a plurality of tensioning rods are inconsistent, the helical gear nuts corresponding to the helical gear pairs are driven to lean against the mold wall of the track plate by the helical gear nuts, when the helical gear nuts are locked first and the path is short, the corresponding helical gears slip, the other helical gear nuts continue to be driven by the corresponding helical gear to lean against the mold wall of the track plate, after all the helical gear nuts are locked, the helical gear is driven by the base to be far away from the corresponding helical gear nuts, that is, under the condition that the positions of the helical gear nuts initially assembled by the tensioning rods are inconsistent, the tensioning, locking and maintaining of all the prestressed tendons can be realized, and the effect that all the prestressed tendons reach the designed prestressed value can be satisfied, and after the tensioning device releases the tensioning rod, the prestress of the prestressed tendon is not lost, and the effect is good.
Preferably, the tensioning device further comprises:
the end die tensioning mechanism comprises a plurality of end die power parts, each end die power part is connected with one tensioning part, and the end die tensioning mechanism is used for being matched with an end die of the track slab die;
the side die tensioning mechanism comprises a plurality of side die power parts, each side die power part is connected with one tensioning part, and the side die tensioning mechanism is used for being matched with the side die of the track plate die.
Further preferably, the end mould power member comprises a hydraulic cylinder.
Further preferably, the side mould power component comprises a hydraulic cylinder.
Further preferably, the end die tensioning mechanism is provided with two rows of the tensioning parts, and the side die tensioning mechanism is provided with one row of the tensioning parts.
Preferably, the tensioning part comprises a clamping jaw, the tensioning rod comprises a clamping section, and the clamping jaw is used for being clamped in the clamping section.
Preferably, the clamping section is located at the end of the tensioning rod.
Preferably, end mould straining device still includes first box and first lifting unit, all end mould power part locates in the first box, first lifting unit is used for driving first box goes up and down, makes on the end mould straining device all the jack catch joint in corresponding stretch-draw pole.
Preferably, side form straining device still includes second box and second lift part, all side form power part locates in the second box, second lift part is used for driving the second box goes up and down, makes all on the side form straining device the jack catch joint in corresponding stretch-draw pole.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. by applying the locking structure of the utility model, the helical gear can drive the helical gear nut to rotate, the helical gear nut rotates to and is screwed on the part to be locked, the helical gear nut stops rotating, the helical gear moves along the self axial direction while continuing to rotate along the self axial line, so that the helical gear and the helical gear nut are separated from the meshing state, the helical gear nut can be ensured to be screwed initially, the helical gear nut can be screwed in place and then separated from the meshing state without further screwing, the wear of the helical gear nut and the part to be locked and the wear of the helical gear nut and the gear teeth on the helical gear are greatly reduced, the service life of each part is prolonged while good screwing efficacy is achieved, the replacement times and the use cost are reduced, and the noise is reduced, the locking structure has the advantages of simple structure, convenient use and good effect;
2. by applying the prestressed tendon tensioning and maintaining component of the utility model, after the helical gear nut is locked on the external thread section and does not rotate, the helical gear enters a slipping state relative to the helical gear nut, the helical gear nut and the helical gear are not meshed any more, the helical gear nut can not be driven to rotate any more by the continuous rotation of the helical gear, so that the locking of the helical gear nut can be ensured, the helical gear and the helical gear nut can be prevented from continuously transferring force and doing work to cause damage of the helical gear and the helical gear nut, the abrasion of the external thread section, the helical gear nut and the helical gear is greatly reduced, the service life of the tension rod is prolonged, the firm locking after the prestressed tendon is tensioned can be met, the prestressed loss is prevented, and the prestressed tendon tensioning maintaining component is simple in structure, convenient to use and good in effect;
3. by applying the prestressed tendon tensioning and maintaining component, the rotating shaft is a spline shaft, the helical gear is provided with a hole matched with the spline shaft, the spline shaft can provide good torque for the helical gear, the rotating requirement of the helical gear is met, and meanwhile the requirement of the helical gear for axial movement along the spline shaft can be well met;
4. when the prestressed tendon tensioning and maintaining component is applied, the second driving component is an air cylinder serving as a driving source, and the second driving component is a weak-pushing flexible driving mechanism relative to motor driving or hydraulic cylinder driving due to strong air compressibility, so that the helical gear nut and the helical gear can retract to a certain extent when being in hard abutting contact, and the helical gear nut and the helical gear are protected to a certain extent;
5. by applying the prestressed tendon tensioning and maintaining component of the utility model, one end of the elastic mechanism along the elastic direction is abutted against the base, and the other end is abutted against one end face of the helical gear, the elastic mechanism is used for providing restoring force for the helical gear moving along the rotating shaft, on one hand, the helical gear nut can be locked, and on the other hand, after the helical gear is driven by the base to be away from the helical gear nut, the helical gear is reset to the initial position by the elastic mechanism, so as to carry out the next operation;
6. by applying the utility model, after the helical gear nut is attached to the wall of a track plate mold along the external thread section, the helical gear immediately enters a slipping state relative to the helical gear nut, and the helical gear nut and the helical gear are not meshed any more, so that the helical gear nut can not be driven to rotate any more by the continuous rotation of the helical gear, the locking of the helical gear nut can be ensured, the helical gear and the helical gear nut can be ensured not to continue to transfer force and do work, the damage of the helical gear and the helical gear nut is caused, the abrasion of the external thread section, the helical gear nut and the helical gear is greatly reduced, the service life of the tension rod is prolonged, the firm locking after the prestressed tendon can be met, the tension prestress loss is prevented, the method has simple steps, convenient realization and good effect;
7. by applying the tensioning device for the prestressed tendons, the helical gear nut is driven by the helical gear nut corresponding to the helical gear pair to be close to the mold wall of the track slab under the condition that the positions of the helical gear nuts, which are sleeved by the initial threads on the tensioning rods, are inconsistent by using the tensioning device for the prestressed tendons, when the helical gear nuts are short in route, the corresponding helical gears slip after being locked first, the other helical gear nuts are continuously driven by the corresponding helical gear to be close to the mold wall of the track slab, and after all the helical gear nuts are locked, the helical gear is driven by the base to be far away from the corresponding helical gear nuts, namely, the tensioning device for the prestressed tendons can tension, lock and maintain all the prestressed tendons under the condition that the positions of the helical gear nuts, which are initially assembled by the tensioning rods, are inconsistent, so that the effect of designing the prestressed tendons can be achieved, and after the tensioning device releases the tensioning rod, the prestress of the prestressed tendon is not lost, and the effect is good.
Drawings
FIG. 1 is a schematic view of the structure, connection and positional relationship of a track slab mold, prestressed reinforcements and tension rods;
FIG. 2 is a schematic view showing the structure, connection and positional relationship of the stretching machine, the track plate mold and the stretching rod;
fig. 3 is a schematic view of a locking structure and a tension maintaining member of a tendon according to the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3;
FIG. 5 is another view from FIG. 3;
fig. 6 is a schematic view of a tension maintaining member of a tendon according to the present invention;
fig. 7 is a schematic view of a prestressed tendon tensioning device according to the present invention;
FIG. 8 is a schematic view of the tensioning device and rail plate mold mating;
FIG. 9 is a schematic view of the connection relationship between the tension member and the end mold power member in the tension device;
FIG. 10 is a partial schematic view of a side form tensioning mechanism in the tensioning device;
fig. 11 is a schematic view of the connection relationship between the tension member and the lateral die power member in the tension device.
The labels in the figure are: 1-track plate die, 2-tension rod, 21-bevel gear nut, 22-external thread section, 23-clamping section, 3-tensioning machine, 4-rotating shaft, 41-bevel gear, 5-base, 51-first driving component, 52-sliding rail, 53-elastic mechanism, 6-tensioning component, 61-clamping jaw, 7-end die tensioning mechanism, 71-end die power component, 72-first lifting component, 721-base, 722-polished rod, 723-third driving component, 724-lead screw transmission component, 8-side die tensioning mechanism, 81-side die power component and 82-second lifting component.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 3-5, the locking structure of the present invention comprises a helical gear nut 21 and a helical gear 41 capable of engaging with the helical gear nut, wherein the helical gear nut 21 is a round nut with internal threads, and helical teeth are provided on the outer wall of the round nut.
The helical gear nut 21 is used for being in threaded connection with a part to be locked, the axis of the helical gear nut 21 is perpendicular to the axis of the helical gear 41, the helical gear 41 is used for driving the helical gear nut 21 to rotate, and the helical gear 41 can move along the axial direction of the helical gear 41.
The locking structure is realized by that the helical gear nut 21 and the helical gear 41 are engaged to rotate, the helical gear nut 21 is screwed to the part to be locked along the axial direction, when the helical gear nut 21 is attached to the part to be locked, that is, after the locking state is reached, the helical gear nut 21 stops rotating, because the helical gear 41 is still in the rotating state, the helical teeth on the helical gear 41 have an acting force on the helical teeth grooves on the helical gear nut 21 or the helical teeth grooves on the helical gear 41 on the helical gear nut 21, the helical teeth grooves on the helical gear nut 21 have a reaction force on the helical teeth on the helical gear 41 or the helical teeth on the helical gear nut 21 on the helical gear 41 on the helical gear nut 41 on the helical gear 41, under the reaction force, the helical teeth on the helical gear 41 move along the helical teeth grooves on the helical gear nut 21, so that the bevel gear 41 moves axially along itself at the same time, and the bevel gear nut 21 and the bevel gear 41 are misaligned and are no longer in an engaged state.
By applying the locking structure of the utility model, the helical gear 41 can drive the helical gear nut 21 to rotate, the helical gear nut 21 rotates to and is screwed on the part to be locked, the helical gear nut 21 stops rotating, the helical gear 41 moves along the self axial direction while continuing to rotate along the self axial line, so that the helical gear 41 and the helical gear nut 21 are disengaged, not only can the helical gear nut 21 be ensured to be screwed initially, but also the helical gear nut 21 can be disengaged after being screwed in place and can not be screwed further, the wear of the helical gear nut 21 and the upper thread of the part to be locked and the wear of the helical gear nut 21 and the upper gear teeth of the helical gear 41 are greatly reduced, the service life of each part is prolonged while good screwing efficacy is achieved, the replacement times and the use cost are reduced, meanwhile, the noise is reduced, and the locking structure is simple in structure, convenient to use and good in effect.
Example 2
As shown in fig. 3 to 6, the tendon tensioning and retaining member of the present invention comprises a locking structure, a rotating shaft 4, a base 5, a first driving assembly 51, a sliding rail 52, a second driving assembly and an elastic mechanism 53 according to embodiment 1, wherein the helical gear nut 21 is used for being screwed to the external thread section 22 of the tensioning rod 2.
The bevel gear 41 is sleeved on the rotating shaft 4 in a sliding manner, the rotating shaft 4 can drive the bevel gear 41 to rotate, the first driving component 51 is arranged on the base 5, the rotating shaft 4 is arranged on the base 5 and connected to the output end of the first driving component 51, the first driving component 51 is used for driving the rotating shaft 4 to rotate, the base 5 is matched with the sliding rail 52 in a sliding manner, the second driving component is connected with the base 5 and drives the base 5 to move along the sliding rail 52, one end of the elastic mechanism 53 in the elastic direction abuts against the base 5, the other end of the elastic mechanism 53 abuts against one end face of the bevel gear 41, and the elastic mechanism 53 is used for providing restoring force for the bevel gear 41 moving along the rotating shaft 4.
As a preferable scheme of this embodiment, the rotating shaft 4 is a spline shaft, and the helical gear 41 is provided with a hole adapted to the spline shaft, and with this structure, the spline shaft can provide a good torque to the helical gear 41, so as to meet the rotation requirement of the helical gear 41, and at the same time, can well meet the requirement that the helical gear 41 moves along the axial direction of the spline shaft.
Preferably, the first driving assembly 51 includes a pneumatic motor, and the rotating shaft 4 is connected to an output end of the pneumatic motor.
Preferably, the second driving assembly includes a cylinder, which is a weak-pushing flexible driving mechanism relative to a motor drive or a hydraulic cylinder drive due to its high gas compressibility, and can have a certain retraction when the helical gear nut 21 and the helical gear 41 are in hard contact, so as to protect the helical gear nut 21 and the helical gear 41 to a certain extent.
As a preferable scheme of this embodiment, the elastic mechanism 53 is a spring, the spring is sleeved on the rotating shaft 4, the spring is disposed to enable the helical gear nut 21 to be locked, and on the other hand, after the base 5 drives the helical gear 41 to be away from the helical gear nut 21, the elastic mechanism 53 resets the helical gear 41 to an initial position to perform the next operation.
The prestressed reinforcement tensioning and maintaining component can be used for prefabricating a track slab, the tensioning rod 2 is connected to the end part of a prestressed reinforcement, and after the prestressed reinforcement is tensioned, the length of the external thread section 22 on the tensioning rod 2 meets the stroke of the helical gear nut 21 so that the helical gear nut can be rotationally attached to the wall of a track slab mold 1; for example, after the prestressed reinforcement is tensioned, the external thread section 22 is still provided at the wall of the rail plate mold 1, so that the helical gear nut 21 can directly rotate and adhere to the wall of the rail plate mold 1; if the external thread section 22 exceeds the wall of the track plate mold 1 after the prestressed reinforcement is tensioned, namely a screw rod section is arranged between the wall of the track plate mold 1 and the external thread section 22, one side of the helical gear nut 21 close to the wall of the track plate mold 1 is connected with a sleeve, and the sleeve can be attached to the wall of the track plate mold 1 after the helical gear nut 21 rotates along the external thread section 22; this allows the external thread 22 to have a sufficient length for the helical gear nut 21 to rotationally engage the wall of the track plate mold 1.
By applying the utility model, after the helical gear nut 21 is locked and does not rotate on the external thread section 22, the helical gear 41 immediately faces the helical gear nut 21 to enter a slipping state, the helical gear nut 21 and the helical gear 41 are not meshed any more, so that the helical gear 41 can not be driven to rotate any more by the continuous rotation of the helical gear 41, thereby not only ensuring the locking of the helical gear nut 21, but also ensuring that the helical gear 41 and the helical gear nut 21 can not be used for continuously transferring force to do work to cause damage of the helical gear nut 21, greatly reducing the abrasion of the external thread section 22, the helical gear nut 21 and the helical gear 41, prolonging the service life of the tension rod 2, satisfying the firm locking after the tensioning of the prestressed tendon, preventing the prestressed loss, and having simple structure, convenient use and good effect.
Example 3
As shown in fig. 3 to 6, the method for implementing tension holding of a tendon according to the present invention, which uses the tension holding member according to embodiment 2, includes the following steps:
A. pulling the tension rod 2 to drive the prestressed reinforcement to be tensioned;
B. the first driving component 51 drives the rotating shaft 4 to rotate, so that the bevel gear 41 rotates, and the second driving component drives the base 5 to move along the slide rail 52, so that the bevel gear 41 is close to the bevel gear nut 21;
C. the bevel gear 41 is engaged with the bevel gear nut 21, and the bevel gear nut 21 rotates along the external thread section 22 and is screwed to the wall of the track plate mold 1;
D. the helical gear nut 21 is attached to the wall of the track plate die 1, the helical gear nut 21 stops rotating, the helical gear 41 is in a rotating state, and helical teeth on the helical gear 41 move along a helical tooth groove on the helical gear nut 21, so that the helical gear 41 simultaneously moves along the axial direction of the rotating shaft 4 and compresses the elastic mechanism 53;
E. after the helical gear 41 moves along the axial direction of the rotating shaft 4, the helical gear 41 is dislocated with the helical gear nut 21, and the meshing state is released, namely the helical gear 41 slips relative to the helical gear nut 21;
F. the second driving assembly drives the base 5 to move along the slide rail 52, so that the bevel gear 41 is far away from the bevel gear nut 21, and the bevel gear 41 moves along the axial direction of the rotating shaft 4 to reset under the action of the restoring force of the elastic mechanism 53.
By applying the utility model, after the helical gear nut 21 is attached to the wall of the track slab mold 1 along the external thread section 22, the helical gear 41 immediately enters a slipping state relative to the helical gear nut 21, the helical gear nut 21 and the helical gear 41 are not meshed any more, so that the helical gear nut 21 is not driven to rotate any more by the continuous rotation of the helical gear 41, thereby ensuring the locking of the helical gear nut 21 and ensuring that the helical gear 41 and the helical gear nut 21 are not easy to continue to transmit force to do work to cause damage of the helical gear nut 21, greatly reducing the abrasion of the external thread section 22, the helical gear nut 21 and the helical gear 41, prolonging the service life of the tension rod 2, satisfying the firm locking after the tensioning of the prestressed tendon, preventing the prestressed loss, and having simple steps, the realization is convenient, and the effect is good.
Example 4
As shown in fig. 7-11, the tension device for prestressed tendons according to the present invention comprises:
an end mold tensioning mechanism 7, including a plurality of end mold power components 71, where each end mold power component 71 is connected to one tensioning component 6, where the tensioning component 6 corresponds to one tensioning rod 2 and one tensioning holding component as described in embodiment 2, the end mold tensioning mechanism 7 is adapted to an end mold of the track slab mold 1, where each tensioning component 6 is used to pull the corresponding tensioning rod 2, i.e., to tension the tendon, and after tensioning is completed, the helical gear nut 21 in each tensioning holding component is used to attach to an end mold wall of the track slab mold 1, the end mold tensioning mechanism 7 is provided with two rows of the tensioning components 6, where the end mold tensioning power components 71 include hydraulic cylinders, and the tensioning components 6 are driven by the hydraulic cylinders to pull the corresponding tensioning rods 2;
side form straining device 8, including a plurality of side form power component 81, every side form power component 81 connects one tensioning component 6, tensioning component 6 corresponds one tensioning rod 2 and one as embodiment 2 tensioning keep parts, side form tensioning device 8 is used for the adaptation the side form of track slab mould 1 is every tensioning component 6 is used for the pulling to correspond tensioning rod 2, tensioning promptly prestressing tendons accomplish tensioning back every in the tensioning keep parts helical gear nut 21 is used for laminating in the side form wall of track slab mould 1, side form tensioning device 8 is equipped with one row tensioning component 6, side form tensioning power component 81 includes the pneumatic cylinder, through the pneumatic cylinder drive tensioning component 6 pulling corresponds tensioning rod 2.
Tensioning member 6 includes jack catch 61, tensioning rod 2 includes joint section 23, joint section 23 is located tensioning rod 2 tip, jack catch 61 be used for the joint in joint section 23.
The end die tensioning mechanism 7 further comprises a first box body and a first lifting component 72, all the end die power components 71 are arranged in the first box body, the first lifting component 72 is used for driving the first box body to lift, so that all the clamping jaws 61 on the end die tensioning mechanism 7 are clamped and connected with the corresponding tensioning rods 2, the first lifting component 72 comprises a base 721, two vertically arranged polish rods 722 and a third driving component 723 are arranged on the base 721, through holes matched with the two polish rods 722 are arranged on the first box body, the third driving component 723 is connected with a lead screw transmission component 724, the lead screw transmission component 724 is connected with the first box body, the third driving component 723 is used for driving the first box body to move up and down along the polish rods 722, and by adopting the structure, because the two polish rods 722 are used as guide rails, the first lifting component 72 has good stability, and the first box body is lifted through the screw rod transmission component 724, so that the precision is high and the positioning is good; the third driving assembly 723 comprises a third motor and a third speed reducer, the third motor is preferably a stepping motor, the third motor is connected with the third speed reducer, and the screw rod transmission assembly 724 is connected to an output end of the third speed reducer.
Side form straining device 8 still includes second box and second lifting unit 82, all side form power component 81 locates in the second box, second lifting unit 82 is used for driving the second box goes up and down, makes on the side form straining device 8 all jack catch 61 joint in corresponding stretch-draw pole 2.
Application a prestressing tendons's tensioning equipment, through above-mentioned prestressing tendons stretch-draw holding member, can make a plurality of initial screw cup joints on the stretch-draw pole 2 under the inconsistent condition in helical gear nut 21 position, helical gear 41 is corresponding helical gear nut 21 drive makes it lean on to track board mould 1 wall, and short as the route helical gear nut 21 locks the back earlier, corresponds helical gear 41 skids, all the other helical gear nut 21 continues to be corresponded helical gear 41 drive is leaned on to track board mould 1 wall, works as all helical gear nut 21 is all locked the back, base 5 just drives helical gear 41 keeps away from corresponding helical gear nut 21, can be in stretch-draw pole 2 initial assembly helical gear nut 21 position is inconsistent under the condition for all prestressing tendons's stretch-draw, Locking and maintaining are carried out, the effect that all prestressed tendons reach the designed prestressed value is met, and after the tensioning device releases the tensioning rod 2, the prestress of the prestressed tendons is not lost, and the effect is good.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A locking structure is characterized by comprising a bevel gear nut (21) and a bevel gear (41) capable of being meshed with the bevel gear nut, wherein the bevel gear nut (21) is used for being in threaded connection with a part to be locked, an included angle is formed between the axis of the bevel gear nut (21) and the axis of the bevel gear (41), the included angle is larger than 0 and smaller than or equal to 90 degrees, the bevel gear (41) is used for driving the bevel gear nut (21) to rotate, and the bevel gear (41) can move along the axial direction of the bevel gear nut.
2. Locking arrangement according to claim 1, characterized in that the helical gear nut (21) axis and the helical gear (41) axis are arranged perpendicular to each other.
3. A tendon tensioning holding member characterized by comprising a locking structure according to any one of claims 1-2, the helical gear nut (21) being adapted to be screwed to the externally threaded section (22) of the tensioning rod (2).
4. A tension maintaining component according to claim 3, further comprising a rotating shaft (4), wherein the helical gear (41) is slidably sleeved on the rotating shaft (4), and the rotating shaft (4) can drive the helical gear (41) to rotate.
5. A tension maintaining member according to claim 4, further comprising a base (5) and a first drive assembly (51) provided thereon, the spindle (4) being provided on the base (5) and connected to an output of the first drive assembly (51), the first drive assembly (51) being adapted to drive rotation of the spindle (4).
6. A tension maintaining member according to claim 5, further comprising a slide rail (52) on which the base (5) is slidably fitted and a second driving assembly which is connected to the base (5) and drives the base (5) along the slide rail (52).
7. A tension maintaining member according to claim 6, further comprising an elastic mechanism (53), one end of the elastic mechanism (53) in an elastic direction thereof abutting against the base (5) and the other end abutting against an end surface of the helical gear (41), the elastic mechanism (53) being configured to provide a restoring force to the helical gear (41) moving along the rotation shaft (4).
8. A tensioning device for a tendon, characterized by comprising at least one tensioning and holding member according to any one of claims 3-7, one tensioning rod (2) and one tensioning member (6) for each tensioning and holding member, each tensioning member (6) being adapted to pull the tensioning rod (2), i.e. to tension the tendon, and the helical gear nut (21) in each tensioning and holding member being adapted to abut against a rail plate mould (1) wall after tensioning.
9. A tensioning device according to claim 8, further comprising:
the end die tensioning mechanism (7) comprises a plurality of end die power components (71), each end die power component (71) is connected with one tensioning component (6), and the end die tensioning mechanism (7) is used for being matched with an end die of the track slab die (1);
the side die tensioning mechanism (8) comprises a plurality of side die power parts (81), each side die power part (81) is connected with one tensioning part (6), and the side die tensioning mechanism (8) is used for being matched with a side die of the track plate die (1).
10. A tensioning device according to any one of claims 8-9, characterized in that the tensioning member (6) comprises a catch (61), and the tensioning rod (2) comprises a snap-in section (23), the catch (61) being adapted to snap into the snap-in section (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921001571.1U CN210651277U (en) | 2019-06-28 | 2019-06-28 | Locking structure, prestressed tendon tensioning and maintaining component and tensioning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921001571.1U CN210651277U (en) | 2019-06-28 | 2019-06-28 | Locking structure, prestressed tendon tensioning and maintaining component and tensioning device |
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| CN210651277U true CN210651277U (en) | 2020-06-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202691A (en) * | 2019-06-28 | 2019-09-06 | 宁波华铁轨道交通装备制造有限公司 | Locking mechanism, tension of prestressed tendon holding member, implementation method and tensioning equipment |
| CN111765191A (en) * | 2020-07-01 | 2020-10-13 | 上海电动工具研究所（集团）有限公司 | Spring pressure adjusting device |
-
2019
- 2019-06-28 CN CN201921001571.1U patent/CN210651277U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202691A (en) * | 2019-06-28 | 2019-09-06 | 宁波华铁轨道交通装备制造有限公司 | Locking mechanism, tension of prestressed tendon holding member, implementation method and tensioning equipment |
| CN110202691B (en) * | 2019-06-28 | 2024-02-02 | 宁波华铁轨道交通装备制造有限公司 | Locking structure, prestressed tendon tensioning and holding component, implementation method and tensioning device |
| CN111765191A (en) * | 2020-07-01 | 2020-10-13 | 上海电动工具研究所（集团）有限公司 | Spring pressure adjusting device |
| CN111765191B (en) * | 2020-07-01 | 2021-11-26 | 上海电动工具研究所（集团）有限公司 | Spring pressure adjusting device |
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