CN2894900Y

CN2894900Y - Spring type hydraulic chuck

Info

Publication number: CN2894900Y
Application number: CN 200620102881
Authority: CN
Inventors: 梁宁
Original assignee: ZHEJIANG HANGZUAN MECHINE MANUFACTURING Co Ltd
Current assignee: ZHEJIANG HANGZUAN MECHINE MANUFACTURING Co Ltd
Priority date: 2006-04-18
Filing date: 2006-04-18
Publication date: 2007-05-02
Anticipated expiration: 2016-04-18

Abstract

The utility model provides a spring type hydraulic chuck and belongs to the technical field of clamping device in drill. The utility model comprises a chuck body, a closing ring, a pressing cover, a closing slip, a closing slip seat, and several groups of strain discreteness which are evenly and coaxially arranged inside the chuck body. The pressing cover and the closing ring are symmetric in the axial direction and fixed and locked an integer by screws. The utility model is characterized in that every group of the strain discreteness comprises a bunch of springs and two pulling rods which are arranged symmetrically on two sides of the spring; the spring is suited on a guide rod; the lower end of the guide rod is through a pressing board and fixed on the closing split seat; and the pulling rod is connected with the pressing cover. The closing plate of the utility model replaces each pulling rod being provided with two bunches of spring with each bunch of springs being provided with two pulling rods, thus the number of parts in the support discreteness is reduced, the work requirement of the small strain can be met, the outer diameter and the rotational inertia of the closing plate are reduced, and the balancing requirement under the high-speed operation is satisfied yet. At the same time, the closing plate of the utility model is effort-saving with the convenient operation, thus the work efficiency can be greatly increased.

Description

A kind of spring oild chuck

Technical field

The utility model belongs to rig chucking device technical field, is specifically related to a kind of spring oild chuck.

Background technology

Chuck of rig is used for the clamping drilling rod, thus with transmission of power to drilling rod.Chuck commonly used has hand chuck, full hydraulic chuck and spring oild chuck.

Common spring oild chuck such as Fig. 1 in the prior art, it is made up of collar 1, gland 2, voussoir 3, slips 4, slip spider 5 and tension force assembly of comprising disk spring 6, dish spring guide rod 7, pull bar 8, pressing plate 9 etc.The disk body central authorities of chuck body connect, and wherein slips 4 is provided with three, and three slips are by the drilling rod of three groups of tension force assembly control opening and closing with clamping and unloading centering through hole.Every group of tension force assembly is provided with 6 liang of strings of dish spring, 8 one on 7 two of dish spring guide rods and pull bar.Per two string dish springs, 6 symmetries are positioned at pull bar 8 both sides.

The said structure of prior art so clamping force is bigger, is applicable to the rig that needs big clamping force, but therefore causes the external diameter of chuck bigger that rotary inertia is big because three groups of tension force assemblies use six string springs, the vibration that produces when running up is also big.

Summary of the invention

In order to overcome deficiency of the prior art, the purpose of the utility model is to provide a kind of spring oild chuck that needs less clamping force can satisfy instructions for use that is applicable to, its chuck body outside dimension of spring chuck of the present utility model is little, rotary inertia is little, the vibration that produces when running up is little, make running more steady, and clamping is laborsaving, operate lightly, operating efficiency improves.

For realizing the utility model purpose by the following technical solutions:

A kind of spring chuck, comprise that the even with one heart cloth of chuck body, gland, collar, slips, slip spider and array is embedded at the tension force assembly of chuck body, gland docks vertically with collar and fastens as one with screw, it is characterized in that every group of tension force assembly comprises a string spring, with two pull bars that are symmetrically placed in the spring both sides, spring housing is loaded on guide rod, and lower end of the guide rod passes a pressing plate and is fixed in slip spider, and pull bar and gland are spirally connected.

Further, described pull bar lower end places the hole of slip spider, and the stroke range that the pull bar rod end slides up and down is lower than the upper edge in hole.Insert in the hole of slip spider the lower end of pull bar, can prevent that pressing plate from rotating.

In the above-mentioned chuck body, can spare three groups of tension force assemblies of cloth with one heart.

Above-mentioned spring is a disk spring.

The spring chuck that the utility model provides is joined two pull bars with every string dish spring, be the alternative every pull bar configuration two string springs in both sides that pull bar is symmetrically placed in the dish spring, reduced the quantity of parts in the tension force assembly, can finish the job requirement of the less power of stepping up, reduce the chuck body outside dimension again, reduce rotary inertia, the vibration that produces when running up is little, makes that running is more steady.

Operation principle of the present utility model is: by pressing plate, pull bar gland, collar are moved down relatively under the effect of dish spring tension force, under the oblique mechanism effect between collar and voussoir, slips is moved to the center, thereby clamping drilling rod, when in oil cylinder, infeeding pressure oil, the piston top collar that makes progress, oblique mechanism make slips leave the center and outwards move, thereby unclamp drilling rod.

The spring chuck that the utility model provides compared to existing technology, beneficial effect is that the utility model chuck outside dimension is little, rotary inertia is little, be easier to highly running requirement for dynamic balance down.The utility model chuck clamping simultaneously is laborsaving, operates lightly, can obviously increase work efficiency.

Description of drawings

Fig. 1 is the structural representation of prior art spring chuck;

Fig. 2 is the A-A cut-away view of Fig. 1;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is the A-A cut-away view of Fig. 3;

Fig. 5 is the B-B cut-away view of Fig. 3.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described:

Embodiment 1:

See Fig. 3～the utility model spring chuck shown in Figure 5.

Form by collar 1, gland 2, voussoir 3, slips 4, slip spider 5 and three groups of tension force assemblies etc.The chuck body center connects, three groups of slips 4 of concentric arrangement in the chuck body, slips 4 places slip spider 5, and with carve piece 3 interlocks, sliding with ramp structure between collar 1 and the voussoir 3 touches.

Three groups of tension force assemblies evenly are embedded at chuck body with one heart, every group of tension force assembly comprises some a string dish springs that build up 6, a guide rod 7 and the pull bar 8 and the pressing plate 9 that are symmetrically arranged in dish spring 6 both sides, three groups of tension force assemblies are totally three string springs, three guide rods and six roots of sensation pull bar.

Guide rod 7 is passed by dish spring 6 endoporus, passes in pressing plate 9, fixedlys connected with slip spider 5 with screw thread or other conventional connected mode, and three guide rods and three string dish springs are uniformly distributed along the circumference; Every string dish spring bilateral symmetry is arranged two pull bars, and pull bar 8 upper ends pass and fix with nut from the hole on the gland 2, and the lower end is connected with pressing plate 9 with screw thread, and its lower end is also stretched in the hole of slip spider 5.Gland 2 docks vertically with collar 1 and fastens as one with screw.

Insert in the hole of slip spider 5 lower end of pull bar, and the stroke range that pull bar 8 rod ends slide up and down is lower than the upper edge in hole, can prevent in the process that pull bar 8 moves up and down, and breaks away from slip spider and carry pressing plate 9 and rotate.

In use: drilling rod stretches into the center through hole of chuck, during oil return, roof pressure bottom pressing plate 9 under the effect of dish spring 6 tension force, drive pull bar 8 gland 2, collar 1 are moved down, under the effect of the ramp structure of 3 of collar 1 and voussoirs, slips 4 moves to the center, thereby clamps drilling rod;

When infeeding pressure oil in oil cylinder 10, piston 9 is top collar 1 upwards, and oblique mechanism makes slips 4 leave the center and outwards moves, thereby unclamps drilling rod.

Claims

1, a kind of spring oild chuck, comprise that the even with one heart cloth of chuck body, collar, gland, slips, slip spider and array is embedded at the tension force assembly of chuck body, gland docks vertically with collar and fastens as one with screw, it is characterized in that every group of tension force assembly comprises a string spring, with two pull bars that are symmetrically placed in the spring both sides, spring housing is loaded on guide rod, and lower end of the guide rod passes a pressing plate and is fixed in slip spider, and pull bar and gland are spirally connected.

2, spring oild chuck as claimed in claim 1 is characterized in that described pull bar lower end places the hole of slip spider, and the stroke range that the pull bar rod end slides up and down is lower than the upper edge in hole.

3, spring oild chuck as claimed in claim 1 or 2 is characterized in that with one heart even three groups of tension force assemblies of cloth in the chuck body.