CN201099992Y

CN201099992Y - Screw type constant tension small retraction prestressing force anchorage cable stretching equipment

Info

Publication number: CN201099992Y
Application number: CNU2007201948153U
Authority: CN
Inventors: 邵培森
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-25
Filing date: 2007-10-25
Publication date: 2008-08-13
Anticipated expiration: 2017-10-25

Abstract

A screw type anchorage cable stretching instrument with constant stretching, small retraction and pre-stress is a pure mechanical stretching implement which can converse a rotating motion to a linear motion and converse a torque force to an axial force according to the traditional mechanical driving principle, wherein a torque limiting mechanism is arranged at an input end, which can control a stretching by setting the degree of an input torque and obtain a corresponding pre-stress for the anchorage cable, a cuneus in the anchorage can be deadlocked by a cuneus lock bolt arranged on the top portion of the input end before the implement unloading, which can inhibit a retracting force produced from the anchorage cable before the stretching implement unloading. The screw type anchorage cable stretching instrument with constant stretching, small retraction and pre-stress is high in reliability and unlimited in environment, adapted for using in severe work conditions, further the stretching instrument is low in cost of production and maintenance relatively, long in service life and high in suitability.

Description

Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device

One, technical field

The utility model relates to a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device, and it belongs to prestressing force and loads the facility technical field.

Two, background technology

Prestress anchorage cable is widely used in fields such as building, bridge, highway, mining supportings, along with improving constantly of the anchor cable manufacturing technology and the strength of materials, stretching force required when applying prestressing force also increases thereupon, employed tensioner mainly is the hydraulic tensioning jack when applying prestressing force at present, and it mainly has the following disadvantages: 1, must dispose comparatively loaded down with trivial details hydraulic-driven and hydraulic control system when using the hydraulic tensioning jack; 2, for improving stretching force, the one, take to strengthen the method for oil cylinder piston sectional area, making the weight of hydraulic tensioning jack increase to operation greatly like this makes troubles, the 2nd, improve hydraulic system pressure, just must use high voltage bearing Hydraulic Elements and improve pressure, cost is multiplied; 3, hydraulic system is suitable for working under the better environment of operating mode and is not suitable for working under bad working environments; 4, harsh to the requirement of environment temperature; 5, the element of hydraulic system is more, the relative failure frequency height.

Three, summary of the invention

For solving defective and the deficiency of using the hydraulic tensioning jack when applying prestressing force, to exist, the utility model provides a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device, this Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device is a kind ofly to utilize traditional mechanical drive principle to rotatablely move to convert rectilinear motion to, torsional forces is converted to the pure mechanical tension facility of axial force, input is provided with torque limited mechanism, controlling stretching force by the size of setting input torque makes anchor cable obtain corresponding prestressing force, the top is provided with the key lock bolt, can the key in the ground tackle is firmly locked before the facility off-load, the amount of recovery that anchor cable produces in the time of can being suppressed at the tensioner off-load effectively.

The technical solution adopted in the utility model is: have two leading screws that be arranged in parallel at least, the one end is adjusted bolt by thrust bearing and phase place and is connected with brace summer, the axial location of thrust bearing is adjusted the bolt decision by phase place, the other end is connected with the speed reducer output shaft cover, the work anchor body is provided with the screw identical with leading screw quantity and cooperates with threads of lead screw, a taper hole is established at work anchor body center, the work anchor intermediate plate places taper hole, the taper hole bottom is provided with internal thread and matches with intermediate plate locking hollow bolt, and brace summer is established a center screw and key locking hollow bolt threaded engagement; Form two-stage NGW type planetary reducer by reductor input gear shaft, reductor input end cap, one-level planetary gear, one-level planet wheel spindle, one-level planetary wheel carrier, reductor shell, secondary planet wheel, secondary planet wheel shaft, secondary planet wheel carrier, the secondary planet wheel carrier of reductor is exported torque and is connected with leading screw by the speed reducer output shaft cover, and reductor input gear shaft one end is connected by key and reductor input gear; Form torque limiter by torque limiter shell, torque limiter end cap, power shaft, torque limiter output gear shaft, dish spring fairlead, dish spring, steel ball, the gear of torque limiter output gear shaft is meshed with each reductor input gear, then power shaft connects power source, and utilizing connecting rod, connecting rod fastening bolt and other securing members that brace summer, reductor output fixed mount, reductor input fixed mount, torque limiter shell, reductor shell are connected is an overall structure.When power shaft applies torque, the torque limiter output gear shaft is given each reductor input gear with torque distribution, make work anchor body moving axially through the rotation synchronously of NGW type planetary reducer deceleration increasing each leading screw of square rear drive along leading screw, the work anchor intermediate plate will tightly be held extremely by the anchor cable of stretch-draw under the effect on inclined-plane, brace summer withstands the anchor cup, because the other end of anchor cable is by anchoring, therefore the axial displacement meeting of work anchor body makes anchor cable tensioning gradually, the internal stress of anchor cable increases with the increase of strain, when internal stress reaches predetermined value, torque limiter will be threaded off automatically, the prestressing force of this moment is constant, after prestressing force applies and finishes, with key locking hollow bolt key is headed in the taper hole of anchor cup until anchor cable is held extremely.

The beneficial effects of the utility model are: the tensioner that utilizes pure theory of mechanics to implement has high reliability, be not subjected to environmental limit, be suitable under abominable operating mode, using, manufacturing and maintenance cost are relatively low, long service life, strong with the suitability of various power sources, can obtain constant prestressing force by the input value of setting torque limiter, the key retaining mechanism can suppress the tensioner amount of recovery that anchor cable produces when off-load effectively remains within the scope of expection prestressing force.

Four, description of drawings

Accompanying drawing is a structure chart of the present utility model

Five, the specific embodiment

As shown in drawings, a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device comprises: torque limiter shell (1), torque limiter end cap (2), power shaft (3), torque limiter output gear shaft (4), dish spring fairlead (5), dish spring (6), steel ball (7), key (8), reductor input gear (9), reductor input gear shaft (10), reductor input fixed mount (11), reductor input end cap (12), one-level planetary gear (13), one-level planet wheel spindle (14), one-level planetary wheel carrier (15), reductor shell (16), secondary planet wheel (17), secondary planet wheel shaft (18), reductor output fixed mount (19), speed reducer output shaft cover (20), secondary planet wheel carrier (21), intermediate plate locking hollow bolt (22), work anchor intermediate plate (23), work anchor body (24), leading screw (25), thrust bearing (26), phase place is adjusted bolt (27), brace summer (28), key locking hollow bolt (29), connecting rod (30), connecting rod fastening bolt (31), it is characterized in that: at least two leading screws that be arranged in parallel (25), the one end is connected with brace summer (28) by thrust bearing (26), the axial location of thrust bearing (26) is adjusted bolt (27) decision by the phase place that is threaded with brace summer (28), the other end is connected with speed reducer output shaft cover (20), work anchor body (24) be provided with the screw identical with leading screw (25) quantity and with leading screw (25) threaded engagement, a taper hole is established at work anchor body (24) center, work anchor intermediate plate (23) places taper hole, the taper hole bottom is provided with internal thread and matches with intermediate plate locking hollow bolt (22), and brace summer (28) is provided with a center screw and key locking hollow bolt (29) threaded engagement; Form two-stage NGW type planetary reducer by reductor input gear shaft (10), reductor input end cap (12), one-level planetary gear (13), one-level planet wheel spindle (14), one-level planetary wheel carrier (15), reductor shell (16), secondary planet wheel (17), secondary planet wheel shaft (18), secondary planet wheel carrier (21), the secondary planet wheel carrier (21) of reductor is exported torque and is connected with leading screw (25) by speed reducer output shaft cover (20), and reductor input gear shaft (10) one ends are connected by key (8) and reductor input gear (9); Form torque limiter by torque limiter shell (1), torque limiter end cap (2), power shaft (3), torque limiter output gear shaft (4), dish spring fairlead (5), dish spring (6), steel ball (7), the gear of torque limiter output gear shaft (4) is meshed with each reductor input gear (9), and then power shaft (3) connects power source; Utilizing connecting rod (30), connecting rod fastening bolt (31) and other securing members that brace summer (28), reductor output fixed mount (19), reductor input fixed mount (11), torque limiter shell (1), reductor shell (16) are connected is an overall structure.When to power shaft (3) when applying torque, torque limiter output gear shaft (4) is given each reductor input gear (9) with torque distribution, make work anchor body (24) moving axially through the rotation synchronously of NGW type planetary reducer deceleration increasing each leading screw of square rear drive (25) along leading screw (25), work anchor intermediate plate (23) will tightly be held extremely by the anchor cable of stretch-draw under the effect on inclined-plane, brace summer (28) withstands the anchor cup, because the other end of anchor cable is by anchoring, therefore the axial displacement meeting of work anchor body (24) makes anchor cable tensioning gradually, the internal stress of anchor cable increases with the increase that should hand over, when internal stress reaches predetermined value, torque limiter will be threaded off automatically, the prestressing force of this moment is constant, after prestressing force applies and finishes, lock hollow bolt (29) with key and key is headed in the taper hole of anchor cup until anchor cable is held extremely.

Claims

1, a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device, comprise the torque limiter shell, square limiter end cap, power shaft, the torque limiter output gear shaft, dish spring fairlead, the dish spring, steel ball, key, reductor input gear, reductor input gear shaft, reductor input fixed mount, reductor input end cap, the one-level planetary gear, the one-level planet wheel spindle, the one-level planetary wheel carrier, the reductor shell, the secondary planet wheel, the secondary planet wheel shaft, reductor output fixed mount, the speed reducer output shaft cover, the secondary planet wheel carrier, intermediate plate locking hollow bolt, the work anchor intermediate plate, the work anchor body, leading screw, thrust bearing, phase place is adjusted bolt, brace summer, key locking hollow bolt, connecting rod, the connecting rod fastening bolt constitutes, it is characterized in that: have two leading screws that be arranged in parallel at least, one end of leading screw is adjusted bolt by thrust bearing and phase place and is connected with brace summer, the axial location of thrust bearing is adjusted the bolt decision by phase place, the other end is connected with the speed reducer output shaft cover, and the work anchor body is provided with the screw identical with leading screw quantity and cooperates with threads of lead screw.

2, a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device according to claim 1 is characterized in that: a taper hole is established at work anchor body center, and the work anchor intermediate plate places taper hole, and the taper hole bottom is provided with internal thread and matches with intermediate plate locking hollow bolt.

3, a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device according to claim 1 is characterized in that: brace summer is established a center screw and key locking hollow bolt threaded engagement.

4, a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device according to claim 1, it is characterized in that: form two-stage NGW type planetary reducer by reductor input gear shaft, reductor input end cap, one-level planetary gear, one-level planet wheel spindle, one-level planetary wheel carrier, reductor shell, secondary planet wheel, secondary planet wheel shaft, secondary planet wheel carrier, the secondary planet wheel carrier of reductor is exported torque and is connected with leading screw by the speed reducer output shaft cover, and reductor input gear shaft one end is connected by key and reductor input gear.

5, a kind of Screw-type Constant Tension Little Regression Initial Stress Anchorage Cable Stretch-draw Device according to claim 1, it is characterized in that: form torque limiter by torque limiter shell, torque limiter end cap, power shaft, torque limiter output gear shaft, dish spring fairlead, dish spring, steel ball, the gear of torque limiter output gear shaft is meshed with the input gear of each reductor, and power shaft connects power source.