CN202162329U - Hydraulic power unit special for high-strength rivet - Google Patents
Hydraulic power unit special for high-strength rivet Download PDFInfo
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- CN202162329U CN202162329U CN2011202127992U CN201120212799U CN202162329U CN 202162329 U CN202162329 U CN 202162329U CN 2011202127992 U CN2011202127992 U CN 2011202127992U CN 201120212799 U CN201120212799 U CN 201120212799U CN 202162329 U CN202162329 U CN 202162329U
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Abstract
The utility model discloses a hydraulic power unit special for a high-strength rivet, which comprises a high-pressure oil pump, an oil pump electrical motor arranged on the high-pressure oil pump, a first oil pipe used for connecting an oil port of a big cavity of a riveter oil cylinder, a second oil pipe used for connecting an oil port of a small cavity of the riveter oil cylinder as well as a change valve used for changing the oil supply direction of the oil ports of the big cavity and the small cavity of the riveter oil cylinder, wherein an oil supply port is connected with the high-pressure oil pump through an oil supply pipe, an oil return port is connected with an oil return pipe, a first oil port at the side of the oil cylinder is connected with the first oil pipe, and a second oil port at the side of the oil cylinder is connected with the second oil pipe; and the oil pump electrical motor is connected with a frequency changer used for providing a variable frequency power source, so that the hydraulic power unit special for the high-strength rivet can be used for changing the rotation speed of the oil pump electrical motor, increasing the pressure of the oil cylinder and improving the riveting effect according to the load.
Description
Technical field
The utility model relates to a kind of pump installation of rivet jockey, particularly is exclusively used in the hydraulic power unit of high strength rivet.
Background technology
The high strength riveting parts is the important fastening means of heavy parts such as rolling stock, engineering machinery, bridge, tower mast and other construction steel structures.The great advantage of high strength riveted joint is that clamping force guarantees, and is shock-resistant, vibration proof.Under long alternate load effect, the high strength riveting parts still can be kept enough clamping forces, never becoming loose, validity, the reliability of assurance linkage function.And, the easy construction of high strength riveting process, cost is not high and well received, is widely used.
The high strength riveted joint how with high strength rivet and the riveting cover that matches, is implemented by special-purpose riveting machine.Chinese patent file CN90217434.7 discloses a kind of technology of hydraulic pressure ring-grooved rivet rifle.This technology is pushed the riveting cover with the tractive force of hydraulic cylinder with push rod die sleeve mode, and the two is united two into one.The structural member of this patent is more, and it is complicated that mechanism seems, and the sealing imperfection, the reliability that is difficult to the work that guarantees.
Chinese patent file CN1806959A has disclosed a kind of hand held hydraulic riveting machine, attempts simplified structure, and weight reduction reduces cost, and fully guarantees its functional reliability and service life.
This hand held hydraulic riveting machine mainly is made up of Power Component A and compression assemblies B two parts.The effect of compression assemblies B is: extruding riveting cover in the afterbody of catching the high strength rivet, the material that riveting is overlapped endoporus is expressed in the locking slot of high strength rivet.The effect of Power Component A is exactly the extruding force that for this reason provides enough.The utility model Power Component A adopts the ultrahigh-pressure hydraulic cylinder to produce tractive force, and it is huge to exert oneself, again control easily.
But this hand held hydraulic riveting machine exists some need the raising aspect, such as, need to improve the positioning accuracy of this hand held hydraulic riveting machine, again such as, self-adaptive hydraulic etc. need be provided.
Summary of the invention
The purpose of the utility model provides a kind of riveting gun hydraulic power unit that is used to provide self-adaptive hydraulic.
According to the first aspect of the utility model, a kind of hydraulic power unit that is exclusively used in the high strength rivet is provided, comprising: high-pressure oil pump;
Be contained in the Oil pump electrical machinery on the said high-pressure oil pump;
Be used for connecting first oil pipe of the big chamber hydraulic fluid port of riveting gun oil cylinder;
Be used for connecting second oil pipe of the loculus hydraulic fluid port of riveting gun oil cylinder;
Be used for changing reversal valve to big chamber of riveting gun oil cylinder and loculus hydraulic fluid port fuel feeding direction; Its oil-feed port connects said high-pressure oil pump via fuel feed pump; Its oil return opening connects oil return pipe, and its oil cylinder side first hydraulic fluid port connects said first oil pipe, and its oil cylinder side second oil return opening connects said second oil pipe;
Wherein, said Oil pump electrical machinery connects the frequency converter that is used to provide variable-frequency power sources.
The hydraulic power unit that is exclusively used in the high strength rivet of the utility model also comprises: first hydraulic control one-way valve that is connected the band hydraulic control mouth among said first oil pipe and second hydraulic control one-way valve that is connected the band hydraulic control mouth among said second oil pipe.
Wherein, the hydraulic control mouth of said first hydraulic control one-way valve connects said second oil pipe, and the hydraulic control mouth of said second hydraulic control one-way valve connects first oil pipe, is configured for the pinpoint hydraulic lock of riveting gun oil cylinder piston thus.
The hydraulic power unit that is exclusively used in the high strength rivet of the utility model also comprises: connect the pressure detector that said fuel feed pump is used to detect the fuel feeding oil pressure; The controller that connects said pressure detector is used for the pressure that detects according to pressure detector, controls said its frequency of frequency converter adjustment.
Wherein, said controller comprises: connect the comparator of said pressure detector output, be used for the pressure signal and the thresholding of pressure detector output are compared; The processor that connects said comparator; Have the VFC end that connects said frequency converter, be used for during less than said thresholding, controlling said frequency converter and keeping its frequency at said pressure signal;, control said frequency converter and heighten its frequency during at said pressure signal greater than said thresholding.
Wherein, said processor also has the switching-over control end of the reversing switch that connects said reversal valve, and the fuel feeding control end that connects the fuel feeding switch of said reversal valve.
With respect to prior art, the utility model have a following technique effect:
1, pumping plant can change the rotating speed of Oil pump electrical machinery according to load size (that is, riveting gun is to the work done situation of rivet and riveting cover), increases oil cylinder working-pressure, improves the riveted joint effect;
2, can improve the positioning accuracy of oil cylinder piston;
Be elaborated below in conjunction with the structure and the principle of accompanying drawing to the utility model.
Description of drawings
Fig. 1 is the schematic diagram of the hydraulic power unit that is exclusively used in the high strength rivet of the utility model;
Fig. 2 is that the hydraulic power unit that is exclusively used in the high strength rivet of the utility model realizes that self adaptation provides the schematic diagram of hydraulic pressure;
Fig. 3 is controling appliance body structure and the schematic diagram of control that shows among Fig. 2;
Fig. 4 is the schematic diagram of the hydraulic power unit that is exclusively used in the high strength rivet of the improved riveting gun piston positioning accuracy of the utility model;
Fig. 5 is the sketch map of embodiment of the hydraulic power unit that is exclusively used in the high strength rivet of the utility model;
Fig. 6 is the structural representation of the riveting gun of the utility model;
Fig. 7 is the structural representation of the riveting gun of the utility model when beginning to rivet.
The specific embodiment
Fig. 1 has shown the principle structure of the hydraulic power unit that is exclusively used in the high strength rivet of the utility model, and is as shown in Figure 1, and the hydraulic power unit that is exclusively used in the high strength rivet of the utility model comprises:
High-pressure oil pump 6;
Be contained in the Oil pump electrical machinery 5 on the said high-pressure oil pump 6;
Be used for connecting first oil pipe 2 of the big chamber hydraulic fluid port of riveting gun oil cylinder 1;
Be used for connecting second oil pipe 3 of the loculus hydraulic fluid port of riveting gun oil cylinder 1;
Be used to change to the big chamber hydraulic fluid port of riveting gun oil cylinder 1 and the reversal valve 4 of loculus hydraulic fluid port fuel feeding direction, this reversal valve 4 is a three position four-way electromagnetic valve, and has oil-feed port 41, oil return opening 42, oil cylinder side first hydraulic fluid port 43 and oil cylinder side second hydraulic fluid port 44; Oil-feed port 41 connects said high-pressure oil pump 6 via fuel feed pump, and oil return opening 42 connects oil return pipe, and oil cylinder side first hydraulic fluid port 43 connects said first oil pipe 2, and oil cylinder side second hydraulic fluid port 44 connects said second oil pipe 3;
Wherein, said Oil pump electrical machinery 5 connects the frequency converter that is used to provide variable-frequency power sources, and this frequency converter is the variation of oil pressure according to load, changes the frequency of power supply.
The high-pressure oil pump 6 of the utility model and Oil pump electrical machinery 5 are formed the power source of pumping plants, with mechanical energy change into hydraulic oil pressure can, through the rotating speed that changes Oil pump electrical machinery hydraulic oil is carried out Flow-rate adjustment.The Oil pump electrical machinery 5 of the utility model is a variable-frequency motor, and high-pressure oil pump 6 can adopt variable to block pump.
In addition, the hydraulic power unit that is exclusively used in the high strength rivet also comprises the fuel tank 7 that is used for holding hydraulic oil.
Fig. 4 has shown the principle of the hydraulic power unit that is exclusively used in the high strength rivet of the improved riveting gun piston positioning accuracy of the utility model; Compare with the hydraulic power unit that is exclusively used in the high strength rivet shown in Figure 1, the hydraulic power unit that is exclusively used in the high strength rivet shown in Figure 4 also comprises: first hydraulic control one-way valve 21 that is connected the band hydraulic control mouth among said first oil pipe 2 and second hydraulic control one-way valve 31 that is connected the band hydraulic control mouth among said second oil pipe 3.
The hydraulic control mouth that the hydraulic control mouth of first hydraulic control one-way valve 21 connects said second oil pipe, 3, the second hydraulic control one-way valves 31 connects first oil pipe 2, is configured for the pinpoint hydraulic lock of riveting gun oil cylinder piston thus.
Hydraulic control one-way valve has valve seat, steel ball, spring, hydraulic control mouth, control plunger and oil-in and oil-out, when hydraulic oil when oil-in gets into, hydraulic oil overcomes spring force, pushes steel ball open, flows out from oil-out.When hydraulic oil when oil-out flows into, steel ball drops on the valve seat, oil stream is not pass by; The control oil that need have pressure in the input of hydraulic control mouth; Control oil is acted on the control plunger, promote plunger advancement, plunger connects push rod; Push rod backs down steel ball, and hydraulic oil just can the direction " oppositely " from the oil-out to the oil-in flow like this.
The riveting gun oil cylinder piston can not pinpoint main cause be; Oil pump electrical machinery 5 is when riveting gun oil cylinder piston precalculated position, with out of service, so that oil cylinder piston is positioned at the precalculated position; But, cause oil cylinder piston to depart from the intended orientation position because there is oil leakage phenomenon in the oil-in of riveting gun oil cylinder.
The utility model utilizes hydraulic lock to the pinpoint principle of riveting gun oil cylinder piston to be: utilize first hydraulic control one-way valve 21 or second hydraulic control one-way valve 31 to stop the leakage of oil of riveting gun oil cylinder oil-in.
The pressure detector 8 that the utility model utilization connects fuel feed pump detects oil pressure, and this pressure detector 8 converts the oil pressure that detects to oil pressure () signal.
Fig. 2 has shown that the hydraulic power unit realization self adaptation that is exclusively used in the high strength rivet of the utility model provides the principle of hydraulic pressure; As shown in Figure 2; Controller connects pressure detector 8, is used for the pressure that detected according to pressure detector 8, controls the variation of the supply frequency of said frequency converter.Controller is also controlled the switching-over and the fuel feeding of reversal valve.When controller was caught rivet, the pressure that pressure detector 8 detects was less, along with the extruding of riveting gun to the riveting cover; The pressure that pressure detector 8 detects becomes big, and when the pressure that detects reached certain value, controller control frequency converter provided high frequency electric source; Thereby quicken the running of Oil pump electrical machinery, increase delivery rate, thereby increased hydraulic pressure; Make riveting gun be expressed to the riveting cover in the locking slot of rivet, and break the nail tail (being kerve) of rivet.
Fig. 3 has shown the details and the control principle of controller, and controller comprises: connect the comparator of said pressure detector output, this comparator is used for the pressure signal and the thresholding of 8 outputs of comparative pressure detector, output and comparative result relative trigger signal; The processor that connects said comparator; Have the VFC end that connects said frequency converter, be used for and at said pressure signal during less than said thresholding, according to the relative trigger signal; Control said frequency converter and keep its frequency; And during greater than said thresholding,, control said frequency converter and heighten its frequency according to the relative trigger signal at said pressure signal.
In addition, processor also has the switching-over control end of the reversing switch K1 that connects said reversal valve 4, and the fuel feeding control end that connects the fuel feeding K switch 2 of said reversal valve 4.
Fig. 5 has shown a specific embodiment of the hydraulic power unit that is exclusively used in the high strength rivet of the utility model, only is with the difference of the hydraulic power unit that is exclusively used in the high strength rivet shown in Figure 4:
Oil feed non-return valve 10 is housed in the fuel feed pump;
Fuel pressure gage 9 connects fuel feed pump.
In an instantiation; The pumping plant of the utility model can adopt the CPU222 of SIMATIC S7-200 series as controller; Expansion analog quantity input/output module EM235 is as the collection of the service data signal of equipment; The man machine operation interface of equipment adopts MT506L 6 " touch-screen; be connected with the communication interface of CPU222 with the realization exchanges data through communication cable, and adopt SIMATIC MCIROMASTER440 frequency converter that Oil pump electrical machinery is carried out stepless speed regulation, realize control the oil cylinder smooth stepless speed-regulating.
On the other hand, the utility model also provides a kind of riveting machine, and this riveted joint is robbed and comprised: the above-mentioned hydraulic power unit that is exclusively used in the high strength rivet and first oil pipe 2 that is connected the said hydraulic power unit that is exclusively used in the high strength rivet and the riveting gun of second oil pipe 3; The wherein said hydraulic power unit that is exclusively used in the high strength rivet provides hydraulic pressure through first oil pipe 2 and second oil pipe 3 to said riveting gun.
Fig. 6 has shown the structure of the utility model riveting gun, and the riveting gun of the utility model comprises hydraulic jack 21, and the oil cylinder cover 22a that has plunger 22 is installed in the hydraulic jack 21; Be sleeved on the piston rod 23 on the plunger 22, can move around along plunger 22; Drum shape extrusion die 24, the one of which end is threaded with piston rod 23, and the other end is provided with press section; Wherein, collet 25 is installed on the plunger 22, is fixed with briquetting 26 on the inwall of piston rod, briquetting 26 is between collet 25 and piston rod 23.
Through extrusion die 24 and briquetting 26 are set on piston rod, can piston rod move forward to the kerve while application of force of riveting cover and rivet, not only simplified the structure of riveting gun, and the efficient that can rivet, breaks the reliability of rivet kerve such as raising.
As shown in Figure 6; The riveting gun of the utility model comprises hydraulic jack 21; Its sidewall is provided with the big chamber hydraulic fluid port 211 and the loculus hydraulic fluid port 212 that is used for being connected pumping plant second oil pipe 3 that is used for connecting pumping plant first oil pipe 2, is provided with plunger 22 in the hydraulic jack 21, and an end of plunger 22 is connected with oil cylinder cover 22a; The other end extends upward, and stretches out hydraulic jack 21 outsides.Piston rod 23 is sleeved on the plunger 22, and can move around along plunger 22, and an end of piston rod 23 is placed in the hydraulic jack 21 and is connected with piston 23a, and wherein piston 23a is between big chamber hydraulic fluid port 211 and loculus hydraulic fluid port 212; The other end of piston rod 23 extends upwardly out hydraulic jack and is connected with the threaded one end of drum shape extrusion die 24, and the other end of drum shape extrusion die 24 is provided with press section.Be positioned on the inner plunger 22 of piston rod 23 collet 25 is installed, be provided with briquetting 26 between collet 25 and the piston rod 23, briquetting 26 is fixed on the inwall of piston rod 23.
Wherein, collet 25 comprises: pedestal 250, and pedestal 250 is a cylindrical shape, and its outer wall is provided with external screw thread, and plunger 22 is a cylindrical shape, and its top inner wall is provided with internal thread, and pedestal 250 is threaded on the plunger 22; Be used for tightening the jaw 251 of rivet kerve 271; Jaw 251 is split type jaw; Split type jaw 251 surrounds cylindrical shape (as shown in Figure 7), and the center of cylinder is the screwed hole 251a that is used for tightening rivet kerve 271, and split type jaw 251 is connected on the pedestal 250 through a plurality of elastic rods 252.Split type jaw 251 opens under the elastic force effect of elastic rod 252, forms reverse frustoconic as shown in Figure 6, and under the squeezing action of briquetting 26, draws into cylindrical shape as shown in Figure 7 in, thereby the kerve 271 of rivet 27 is clamped in the screwed hole 251a.
As shown in Figure 6; The briquetting 26 of the utility model is for being enclosed in the circular of collet 25 outsides; Its internal diameter is less than or equal to the outer warp of the cylinder that forms when split type jaw 251 draws in, makes that so just briquetting just can push jaw when briquetting moved to jaw 251 positions under the drive of piston rod 23; Make split type jaw draw in; Form cylindrical shape as shown in Figure 7, and the kerve 271 of rivet 27 is stuck in the screwed hole 251a tightly, thereby improved the step up power of split type jaw the rivet kerve.
The briquetting 6 of the utility model also can be a plurality of independent block along piston rod 23 inwall circle distribution; A plurality of blocks are positioned at sustained height on piston rod 23 inwalls; Make when piston rod moves up; Drive a plurality of blocks and move up simultaneously, the split type jaw 251 of collet 25 draws in the acting in conjunction of a plurality of blocks and forms cylindrical shape as shown in Figure 7.
Press section on the utility model drum shape extrusion die 24 is the through hole 240 that is arranged on drum shape extrusion die 24 ends, and through hole 240 is divided into two parts, and its lower end is cylindrical, and the diameter of cylinder is less than the outer warp of the cover of the riveting on the locking slot that is sleeved on rivet 27 272; Through hole 240 upper ends are back taper; The base diameter of inverted cone equates with body diameter; Top diameter is more than or equal to the outer warp of riveting cover, so that drum shape extrusion die 24 is when moving up under the drive of piston rod 23, the riveting cover can be introduced in the through hole 240 of drum shape extrusion die 24; The cylindrical part of through hole 240 pushes the riveting cover, thereby the riveting cover is riveted on the locking slot 272 of rivet 27.
Although preceding text specify the utility model, the utility model is not limited thereto, and those skilled in the art of the present technique can carry out various modifications according to the principle of the utility model.Therefore, all modifications of being done according to the utility model principle all are to be understood that to falling into the protection domain of the utility model.
Claims (10)
1. hydraulic power unit that is exclusively used in the high strength rivet is characterized in that comprising:
High-pressure oil pump (6);
Be contained in the Oil pump electrical machinery (5) on the said high-pressure oil pump (6);
Be used for connecting first oil pipe (2) of the big chamber hydraulic fluid port of riveting gun oil cylinder (1);
Be used for connecting second oil pipe (3) of the loculus hydraulic fluid port of riveting gun oil cylinder (1);
Be used for changing the reversal valve (4) of big chamber of riveting gun oil cylinder (1) and loculus hydraulic fluid port fuel feeding direction; Its oil-feed port (41) connects said high-pressure oil pump (6) via fuel feed pump; Its oil return opening (42) connects oil return pipe; Its oil cylinder side first hydraulic fluid port (43) connects said first oil pipe (2), and its oil cylinder side second hydraulic fluid port (44) connects said second oil pipe (3);
Wherein, said Oil pump electrical machinery (5) connects the frequency converter that is used to provide variable-frequency power sources.
2. the hydraulic power unit that is exclusively used in the high strength rivet according to claim 1 is characterized in that also comprising: be connected first hydraulic control one-way valve (21) of the band hydraulic control mouth among said first oil pipe (2) and be connected second hydraulic control one-way valve (31) of the band hydraulic control mouth among said second oil pipe (3).
3. the hydraulic power unit that is exclusively used in the high strength rivet according to claim 2; It is characterized in that; The hydraulic control mouth of said first hydraulic control one-way valve (21) connects said second oil pipe (3); The hydraulic control mouth of said second hydraulic control one-way valve (31) connects first oil pipe (2), is configured for the pinpoint hydraulic lock of riveting gun oil cylinder piston thus.
4. according to claim 2 or the 3 described hydraulic power units that are exclusively used in the high strength rivet, it is characterized in that also comprising: connect the pressure detector (8) that said fuel feed pump is used to detect the fuel feeding oil pressure.
5. according to claim 2 or the 3 described hydraulic power units that are exclusively used in the high strength rivet, it is characterized in that also comprising: the controller that connects said pressure detector (8).
6. the hydraulic power unit that is exclusively used in the high strength rivet according to claim 5 is characterized in that, said controller comprises:
The comparator that connects said pressure detector output is used for the pressure signal and the thresholding of pressure detector (8) output are compared;
The processor that connects said comparator has the VFC end that connects said frequency converter.
7. the hydraulic power unit that is exclusively used in the high strength rivet according to claim 6; It is characterized in that; Said processor also has the switching-over control end of the reversing switch (K1) that connects said reversal valve (4), and the fuel feeding control end that connects the fuel feeding switch (K2) of said reversal valve (4).
8. the hydraulic power unit that is exclusively used in the high strength rivet according to claim 6 is characterized in that also comprising, is used for holding the fuel tank (7) of hydraulic oil.
9. the hydraulic power unit that is exclusively used in the high strength rivet according to claim 7 is characterized in that, air filter (14), liquid level gauge (15) and fuel outlet valve (16) are housed on the said fuel tank (7).
10. the hydraulic power unit that is exclusively used in the high strength rivet according to claim 9 is characterized in that, overflow valve (11) is housed between said fuel feed pump and said oil return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202127992U CN202162329U (en) | 2011-06-22 | 2011-06-22 | Hydraulic power unit special for high-strength rivet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202127992U CN202162329U (en) | 2011-06-22 | 2011-06-22 | Hydraulic power unit special for high-strength rivet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202162329U true CN202162329U (en) | 2012-03-14 |
Family
ID=45798181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202127992U Expired - Fee Related CN202162329U (en) | 2011-06-22 | 2011-06-22 | Hydraulic power unit special for high-strength rivet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202162329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240770A (en) * | 2011-06-22 | 2011-11-16 | 李俊 | Riveting machine special for high-strength rivet and hydraulic power unit |
| CN110504792A (en) * | 2018-05-18 | 2019-11-26 | 福建闽东电机股份有限公司 | A kind of cooling Oil pump electrical machinery and its implementation certainly |
-
2011
- 2011-06-22 CN CN2011202127992U patent/CN202162329U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102240770A (en) * | 2011-06-22 | 2011-11-16 | 李俊 | Riveting machine special for high-strength rivet and hydraulic power unit |
| CN102240770B (en) * | 2011-06-22 | 2013-07-31 | 李俊 | Riveting machine special for high-strength rivet and hydraulic power unit |
| CN110504792A (en) * | 2018-05-18 | 2019-11-26 | 福建闽东电机股份有限公司 | A kind of cooling Oil pump electrical machinery and its implementation certainly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20200622 |