CN202639796U - Pre-tightening locking device for clamping parts on shaft - Google Patents
Pre-tightening locking device for clamping parts on shaft Download PDFInfo
- Publication number
- CN202639796U CN202639796U CN 201220292180 CN201220292180U CN202639796U CN 202639796 U CN202639796 U CN 202639796U CN 201220292180 CN201220292180 CN 201220292180 CN 201220292180 U CN201220292180 U CN 201220292180U CN 202639796 U CN202639796 U CN 202639796U
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- nut
- locking device
- axle
- face
- gasket ring
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Abstract
The utility model provides a pre-tightening locking device for clamping parts on a shaft. The locking device comprises a backing ring, a pre-tightening nut, a hydraulic nut and a tightening screw, wherein the backing ring is provided with a first end face and a second end face which are opposite to each other; the backing ring is sleeved on the shaft; the first end face is tightly jointed with the to-be-clamped parts; the pre-tightening nut is jointed on the shaft in a threaded manner; one end of the pre-tightening nut is jointed with the second end face of the backing ring; the hydraulic nut is jointed on the outer side of the pre-tightening nut in a threaded manner; the ring piston of the hydraulic nut can apply an acting force to the backing ring under the action of a fluid pressure, so that a gap is formed between the backing ring and the pre-tightening nut; and the tightening screw can be jointed with an axial threaded through hole in a threaded manner, and can penetrate through the axial threaded through hole to fill the gap till the tightening screw is jointed with the second end face of the backing ring. According to the pre-tightening locking device for clamping the parts on the shaft, the gap is filled by the pre-tightening screw, so that a pre-tightening force can be maintained, and the parts on the shaft can be firmly clamped; and under the situation, the hydraulic nut can be dismounted, so that the cost is obviously reduced.
Description
Technical field
The utility model relates to a kind of pretension locking device for part being clamped on the axle, and this axle especially is the female axle of hard alloy roll.In addition, the utility model also relates to the method that this pretension locking device of a kind of usefulness assembles hard alloy roll, and assembles the hard alloy compound roller that obtains by the method.
Background technology
Often need to be on axle in machinery industry a plurality of parts of fixed clamp.For example, in the hot-strip production process, usually use various hard alloy compound rollers, with the life-span of improving roll and the surface quality of improving stocking.Hard alloy compound roller generally includes with the female axle of the roll of boss, and the alloy collars and the spacer ring that are sleeved on female axle and arrange near a plurality of compartments of the female crown of roll platform of roll.Wherein, by the pretension locking device alloy collars and spacer ring are clamped on the female axle of roll regularly.
Know, can utilize hydraulic nut to realize the assembling of hard alloy compound roller.Hydraulic nut can produce larger axial pre tightening force, guarantees fastening mechanism in the situation that the environmental fluctuatings such as vibration, variations in temperature, impact are large and effectively overcomes Axial creep, and is fastening stable.
Chinese patent CN 01240838.7 has announced a kind of hydraulic nut device, and it comprises pressure measuring tie-in and pressure measurement exhaust joint.Be provided with seal between the circumferential contact-making surface of groove in its annular boss and nut body, it is worked under pressure.This hydraulic nut device has the characteristics such as simple in structure, easy to manufacture, that cost is low, thrust output is large.Yet this device in use needs pressure measurement and ftercompction, otherwise might become flexible, and fastening shakiness finally causes retention mechanism to lose efficacy.
Some hydraulic pre-tightening mechanisms are also disclosed in Chinese patent CN 02208899.7, CN 03226253.1 and CN 200520050660.9.The common feature of these hydraulic pre-tightening mechanisms is, after hydraulic nut has reached required pretightning force, at hydraulic nut and be held fill in gasket ring (being slightly less than semicircle) between the part, with the retaining ring on inclined-plane or cambridge ring etc., in order to fill the gap between hydraulic nut and clamping part, transmission of pressure, and after the hydraulic nut release, keep the pretightning force of retention mechanism.The advantage of the hydraulic pre-tightening mechanism maximum of this class formation is that hydraulic nut need to not worked under pressure, and is therefore very safe, and pretension is reliable and stable.Yet its shortcoming is, the seal of hydraulic nut is made by macromolecular material, and it is subjected to the impact of the factors such as temperature, oil, aqueous vapor to be easy to wear out, and is unfavorable for repeatedly using.In addition, this high voltage bearing seal is harsh, expensive to the requirement of material.
The utility model content
For the problems referred to above, the utility model aims to provide a kind of pretension locking device for part being fastened on the axle, it can need not to make hydraulic nut to bear for a long time the impact of working environment part to be assembled pretension and being locked on the axle reliably simultaneously, obtains thus long service life.
According to the utility model, a kind of pretension locking device for part being clamped on the axle is provided, comprising: have the first relative end face and the gasket ring of the second end face, described gasket ring is enclosed within on the axle, and its first end face closely engages with part to be held; Be threaded over the pre-load nut on the axle, an end of described pre-load nut engages with the second end face of described gasket ring, and described pre-load nut also comprises axial tapped through hole; Be threaded over the hydraulic nut on the outside of described pre-load nut, the annular piston of described hydraulic nut can apply active force to described gasket ring under the effect of fluid pressure, thereby forms the gap between described gasket ring and described pre-load nut; And trip bolt, it can engage with described axial thread through hole whorl formula, and passes the described gap of described axial thread filling through hole, until engage with the second end face of described gasket ring.
According to the utility model, by be filled in the gap that is formed under the fluid pressure action between pre-load nut and the gasket ring with trip bolt, just can keep pretightning force, so that parts on shaft can be securely held.In this case, can pull down hydraulic nut, participate in the operation of axle so that hydraulic nut can not be retained on the axle.That is to say, hydraulic nut only uses in pretension locking process, and can not be exposed under the abominable environment for use of being generally of axle.Thus, prolonged significantly the service life of hydraulic nut.
In addition, utilize trip bolt to be filled in the gap that is formed under the fluid pressure action between pre-load nut and the gasket ring, can fill exactly the gap, avoid selecting half suitable ring (for example making up a plurality of standard half rings) to come the operation in adaptive this gap, thereby simplified operation.Simultaneously, adopt trip bolt to fill the gap, also can accurately remain on the axiality between the parts on the female axle of the rear roll of pretension and locking and the axle, reduce the circular runout of parts on the axle.
According to an embodiment of the present utility model, the annular piston in the hydraulic nut directly acts on the described gasket ring.
According to an embodiment of the present utility model, hydraulic nut is configured to the form of hollow cylinder, and can remove from axle.
Preferably, pre-load nut comprises the tapped through hole that a plurality of edges circumferentially are evenly arranged, and a trip bolt is installed in each tapped through hole.
In a specific embodiment, trip bolt is interior hexagonal flush end trip bolt.
In a specific embodiment, described axle is the female axle of the roll of hard alloy compound roller, and described part comprises spaced apart alloy collars and spacer ring, and abuts against on the boss of the female axle of described roll.
According to the utility model, by be filled in the gap that is formed under the fluid pressure action between pre-load nut and the gasket ring with trip bolt, just can keep pretightning force, so that parts on shaft can be securely held.After this just can remove hydraulic nut, and other relevant part.Like this, hydraulic nut can not be used from the rolling operation of hard alloy compound roller together with hard alloy compound roller one.Therefore, hydraulic nut and seal wherein can not afford the impact of the unfavorable factors such as temperature in the working environment, oil, aqueous vapor for a long time.Improved significantly thus the service life of hydraulic nut.Simultaneously, detachable hydraulic nut and force-transmitting pole etc. all can be reused.In addition, the hard alloy compound roller that utilizes this pretension locking device to be assembled does not comprise hydraulic nut, and this has just reduced cost significantly, still can reach reliable pretension locking simultaneously.
Test shows, utilizes the utility model, and the cost of hard alloy compound roller can reduce about 30%, and can improve 20 the service life of the seal in the hydraulic nut, more than the thirtyfold.
Description of drawings
Come embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.Need to prove, these accompanying drawings only are used for understanding the utility model better, do not consist of restriction of the present utility model.
Fig. 1 schematically illustrates the structure according to the pretension locking device of the second embodiment of the present utility model.
Fig. 2 schematically illustrates and utilizes pretension locking device shown in Figure 1 to come the process that hard alloy roll is assembled.
Fig. 3 schematically illustrates the hard alloy compound roller that assembles by pretension locking device shown in Figure 1.
The specific embodiment
For simplicity, come the utility model is described as an example of hard alloy roll example in the following description.Yet those skilled in the art will appreciate that the utility model can be used for pretension and the locking of other parts on shaft equally.
As shown in Figure 2, hard alloy compound roller generally includes with the female axle g of the roll of boss h.Alloy collars f and spacer ring e that alternating expression is arranged are sleeved on female axle g, and nestle up the female crown of roll platform of roll h.Easily understand, although shown two alloy collars f and a spacer ring e among Fig. 2, however needs that their quantity also can be as the case may be and suitably changing.
Shown in Fig. 1 to 3, comprise according to pretension locking device 200 of the present utility model: gasket ring 101, its first end face 111 closely engages with part to be held (being in this example alloy collars f); With pre-load nut 103, its inside and outside surface is equipped with screw thread.Pre-load nut 3 is coupled on the female axle g of roll by its internal thread, and acts on one end (left end among Fig. 1) on the second end face 112 of gasket ring 101.
Pretension locking device 200 also comprises hydraulic nut 104.Hydraulic nut 104 is configured to the form of hollow cylinder, and it is installed on the external screw thread on the pre-load nut 103 by internal thread.The annular piston 105 of hydraulic nut 104 acts on the second end face 112 of gasket ring 101 at the radial outside of pre-load nut 103.Hydraulic nut also comprises cylinder body (not shown), sealing ring and the fluid passage 142 that communicates with annular piston 105.This 26S Proteasome Structure and Function of hydraulic nut is that those skilled in the art is known, and therefore detailed introduction is omitted at this.
In this embodiment, pre-load nut 103 comprises along circumferential equally distributed several axial tapped through holes 131.In each tapped through hole 131, be equipped with a trip bolt 107.Trip bolt 107 is bonded in the tapped through hole 131, and can vertically motion in tapped through hole 131.
Fig. 2 has shown the process of utilizing pretension locking device 200 to assemble hard alloy compound roller.At first female axle g is in ground, below with boss h and vertically erects (namely being in the state that is rotated counterclockwise 90 degree with respect to Fig. 2), and be fixed on the unshowned support.Then pack into successively the first carbide roll ring f, spacer ring e, the second carbide roll ring f and gasket ring 101, so that the first carbide roll ring f is resisted against on the boss h, and the first end face 11 1 of gasket ring 101 is resisted against on the second carbide roll ring f.Afterwards, pre-load nut 103 is screwed on female axle g, makes the one end abut against the second end face 112 of gasket ring 101.With female axle g 90-degree rotation, so that female axle g is in state shown in Figure 2.Then hydraulic nut 104 is screwed on the pre-load nut 103, preferred so that annular piston 105 just contacts with the second end face 112 of gasket ring 101.
In operation, pressurize to the annular piston 105 in the cylinder body 141 by fluid passage 142.At this moment, annular piston 105 produces axially-movable because of stressed, thereby pressure is passed to gasket ring 101.In this case, gasket ring 101 produces axial displacement, at first eliminates the end play between carbide roll ring f and the spacer ring e.Along with the continuous increase of pressure, force axis mechanism to produce strain, strains such as the compression of spacer ring gasket ring, axle elongation, screw thread distortion, thus form pretightning force.At this moment, between gasket ring 101 and pre-load nut 103, will form certain gap.
When the oil pressure in the hydraulic nut 104 reaches design load, be screwed into trip bolt 107 in the tapped through hole 131 and regulate, so that the front end of trip bolt 107 reaches outside the tapped through hole 131, thereby filled the gap that is formed between gasket ring 101 and the pre-load nut 103, and engaged with the second end face 112 of gasket ring 101.But the just oil pressure in the removal hydraulic nut 104 then, this moment gasket ring 101 with pre-load nut 103 dieback by trip bolt 107 and tightly, keep pretightning force.
Can by in the hole 143 of removing stage makeup and costume on the periphery that suitable instrument, for example crowfoot is inserted into hydraulic nut 104, unload hydraulic nut 104 after this.So far, hard alloy compound roller has just been finished assembling, as shown in Figure 3.At this moment, hard alloy compound roller can further be installed, and enters duty.
According to pretension locking device of the present utility model, be dismountable hydraulic nut after finishing assembling, so that hydraulic nut need not to be used from the rolling operation together with hard alloy compound roller one.Like this, hydraulic nut and seal wherein can not afford the impact of the unfavorable factors such as temperature in the working environment, oil, aqueous vapor for a long time, have improved significantly its service life.Simultaneously, detachable hydraulic nut can be reused.In addition, the hard alloy compound roller that utilizes this pretension locking device to be assembled does not comprise hydraulic nut, and this has just reduced cost significantly, still can reach reliable pretension locking simultaneously.
In addition, by adopting trip bolt 107 to come gap between filler ring 101 and the pre-load nut 103, can fill exactly the gap, come the operation in adaptive this gap thereby remove half ring (for example several standard half rings being combined) of selecting to have suitable height from, so simplified operation.Simultaneously, adopt trip bolt 107 to fill the gap, also can accurately keep the axiality between the parts on the female axle of roll and the axle, reduce the circular runout of parts on the axle.In addition, this structure is also very simple, easily produces.
When needs are changed carbide roll ring, only need again hydraulic nut 104 to be screwed on the pre-load nut 103.Pass into afterwards high-pressure fluid, utilize annular piston 105 jack-up gasket rings 101, so that trip bolt 107 separates with pre-load nut 103, just can unclamp trip bolt 107 this moment.Afterwards release is eliminated pretightning force, so just can dismantle successively pre-load nut 103, gasket ring 101, carbide roll ring f and spacer ring e etc.
In a preferred embodiment, trip bolt 107 is interior hexagonal flush end trip bolt.Can carry out the operation of Simple fast to trip bolt 107 thus.The length of interior hexagonal flush end trip bolt may be selected to the length of axial tapped through hole 131 about equally.
According to the utility model, the available high strength steels such as pre-load nut, hydraulic nut, gasket ring, annular piston, especially the high-strength alloy structural steel is made.In an example, pre-load nut, hydraulic nut for example adopt 35CrMnSiA to make, and gasket ring, annular piston for example adopt 42CrMo to make.
Although the utility model is described with reference to some embodiment, yet is appreciated that and carries out various improvement or replacement to it in the situation that do not break away from scope of the present utility model.Especially, only otherwise have structural conflict, the feature among each embodiment all can mutually combine, and formed combined type feature still belongs in the scope of the present utility model.The utility model is not limited to disclosed specific embodiment in the literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (6)
1. one kind is used for part is clamped in pretension locking device on the axle, comprising:
Have the first relative end face and the gasket ring of the second end face, described gasket ring is enclosed within on the axle, and its first end face closely engages with part to be held,
Be threaded over the pre-load nut on the axle, an end of described pre-load nut engages with the second end face of described gasket ring, and described pre-load nut also comprises axial tapped through hole,
Be threaded over the hydraulic nut on the outside of described pre-load nut, the annular piston of described hydraulic nut can apply active force to described gasket ring under the effect of fluid pressure, thereby forms the gap between described gasket ring and described pre-load nut, and
Trip bolt, it can engage with described axial thread through hole whorl formula, and passes the described gap of described axial thread filling through hole, until engage with the second end face of described gasket ring.
2. pretension locking device according to claim 1 is characterized in that, the annular piston in the described hydraulic nut directly acts on the described gasket ring.
3. pretension locking device according to claim 1 and 2 is characterized in that, described hydraulic nut is configured to the form of hollow cylinder, and can remove from axle.
4. pretension locking device according to claim 1 and 2 is characterized in that, described pre-load nut comprises the tapped through hole that a plurality of edges circumferentially are evenly arranged, and a trip bolt is installed in each tapped through hole.
5. pretension locking device according to claim 1 and 2 is characterized in that, described trip bolt is interior hexagonal flush end trip bolt.
6. pretension locking device according to claim 1 and 2 is characterized in that, described axle is the female axle of the roll of hard alloy compound roller, and described part comprises spaced apart alloy collars and spacer ring, and abuts against on the boss of the female axle of described roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220292180 CN202639796U (en) | 2012-06-20 | 2012-06-20 | Pre-tightening locking device for clamping parts on shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220292180 CN202639796U (en) | 2012-06-20 | 2012-06-20 | Pre-tightening locking device for clamping parts on shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202639796U true CN202639796U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220292180 Expired - Lifetime CN202639796U (en) | 2012-06-20 | 2012-06-20 | Pre-tightening locking device for clamping parts on shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202639796U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401548A (en) * | 2017-08-10 | 2017-11-28 | 浙江恒成硬质合金有限公司 | A kind of hard alloy composite roll hydraulic nut |
| CN107999541A (en) * | 2017-12-11 | 2018-05-08 | 株洲硬质合金集团有限公司 | A kind of nut locked instrument and the assembly roller with the device |
| CN111408741A (en) * | 2020-04-02 | 2020-07-14 | 广州市昊志机电股份有限公司 | Adjustable spindle locking device and lathe spindle box structure |
-
2012
- 2012-06-20 CN CN 201220292180 patent/CN202639796U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401548A (en) * | 2017-08-10 | 2017-11-28 | 浙江恒成硬质合金有限公司 | A kind of hard alloy composite roll hydraulic nut |
| CN107999541A (en) * | 2017-12-11 | 2018-05-08 | 株洲硬质合金集团有限公司 | A kind of nut locked instrument and the assembly roller with the device |
| CN107999541B (en) * | 2017-12-11 | 2024-03-19 | 株洲硬质合金集团有限公司 | Nut locking device and combined roller with same |
| CN111408741A (en) * | 2020-04-02 | 2020-07-14 | 广州市昊志机电股份有限公司 | Adjustable spindle locking device and lathe spindle box structure |
| CN111408741B (en) * | 2020-04-02 | 2021-08-31 | 广州市昊志机电股份有限公司 | Adjustable spindle locking device and lathe spindle box structure |
| WO2021196792A1 (en) * | 2020-04-02 | 2021-10-07 | 广州市昊志机电股份有限公司 | Adjustable spindle locking apparatus and lathe spindle housing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |