CN202370780U - Positive displacement vacuum pump based on Maltese cross movement mechanism - Google Patents
Positive displacement vacuum pump based on Maltese cross movement mechanism Download PDFInfo
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- CN202370780U CN202370780U CN2011205127373U CN201120512737U CN202370780U CN 202370780 U CN202370780 U CN 202370780U CN 2011205127373 U CN2011205127373 U CN 2011205127373U CN 201120512737 U CN201120512737 U CN 201120512737U CN 202370780 U CN202370780 U CN 202370780U
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- movement mechanism
- groove
- driven disc
- maltese cross
- cross movement
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Abstract
The utility model discloses a positive displacement vacuum pump based on a Maltese cross movement mechanism. The positive displacement vacuum pump comprises the Maltese cross movement mechanism, wherein grooves are formed on a driven disc; a clamping body is arranged on a driving disc; pump cavities are formed at the bottoms of the grooves; pistons are arranged in the pump cavities; two pistons of which the axes are positioned on the same straight line are connected by a rigid connecting piece; the driven disc rotates around a movement shaft; an air inlet hole and an air outlet hole are formed in the movement shaft; and when the clamping body is clamped with one groove, the pump cavity corresponding to the groove is communicated with the air outlet hole, and another pump cavity which is positioned on the same axis as the pump cavity is communicated with the air inlet hole. Due to the adoption of the Maltese cross movement mechanism, the vacuum pump is high in control accuracy; a mode of circular motion is utilized fully, so that the vacuum pump stably runs, is high in efficiency, low in loss and long in service life, the vibration and noise of a pump body can be reduced substantially, and an air inlet valve plate and an air exhaust valve plate are not needed; and due to the adoption of a rotary machine, the tightness of air inlet and air exhaust is high, and high vacuum degree can be achieved.
Description
Technical field
The utility model relates to a kind of vacuum pump, particularly a kind of vacuum displacement pump based on Maltese cross movement mechanism.
Background technique
Vacuum pump is widely used in all trades and professions, and the vacuum pump kind is more to have multiple structure, and various structures all have pluses and minuses separately, and the limiting vacuum value that can reach also has very big difference.Big and the efficient low (like reciprocating piston pump, sliding vane rotary pump) of the surface friction drag that has, but easy to manufacture, cost is low; The efficient height that has but processing difficulties (like Roots pump, screw pump), cost are high.Wherein the reciprocating piston type vacuum pump is the most ripe at present and the most reliable a kind of structural type; It realizes air-breathing, exhaust through cylinder; Can reach higher vacuum values; Because piston has the reliability height, maintenance is easy, easy to process, assembling is simple, the low significant advantage of cost, thereby the reciprocating piston type vacuum pump is still present most popular vacuum pump.
Reciprocating piston type vacuum pump forms of motion is that piston is done linear reciprocating motion in pump chamber, and the spatial volume generating period that piston and pump chamber are surrounded changes, to reach the purpose of air inlet and exhaust.Because the form that the providing of current driving force mostly is to rotatablely move provides, so for the driven plunger linear reciprocating motion, must drive reciprocating motions of the pistons through mechanisms such as bent axle, connecting rods, the size of complete machine is become greatly.The linear reciprocating motion of piston is an acceleration and deceleration motion, and connecting rod is plane motion, certainly lead to unbalanced inertial force like this and cause the vibration and the mechanical noise of machine, and piston is easy to wearing and tearing, and the working life of vacuum pump is shorter.Eccentric swing has also increased force of sliding friction greatly in addition, thus consume more powerful, and rotating speed can not be too high, so efficient is lower.
Comprehensive above-mentioned reason, how to find a kind of easy to manufacture, cost is low, efficient is high, the vacuum pump of high vacuum values, is the target that the Professional visitors tries hard to gain all the time always.
The model utility content
To the deficiency of above-mentioned existing technology, the purpose of the utility model provides that a kind of noise is little, reliability is high, long service life, vacuum pump with high vacuum values.
For solving the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of vacuum displacement pump based on Maltese cross movement mechanism comprises Maltese cross movement mechanism, and said Maltese cross movement mechanism comprises a drive plate and a driven disc; Said driven disc is provided with the even number groove, and said groove radially evenly distributes along said driven disc, and said drive plate is provided with an engaging body; When said engaging body engages with said groove; Said drive plate rotation can drive said driven disc rotation, and the bottom of said groove is provided with through hole, and said through hole forms pump chamber; Be provided with the piston that matches with it in the said pump chamber, two pistons that axis is located along the same line connect through rigid connector; Said driven disc is around rotating with a machine mandrel; Said machine mandrel is fixed; Said pump chamber is connected with the motive sealing of said pole piece axle, and said pole piece axle is provided with an inlet hole and an air outlet hole, when said engaging body engages with a groove; The corresponding pump chamber of this groove is communicated with said air outlet hole, and another pump chamber that is positioned at same axis with this pump chamber is communicated with said inlet hole.
Preferably, on said driven disc, form arc-shaped concave between adjacent two grooves; Said drive plate is provided with a cam; When said engaging body and said groove broke away from, said cam matched with said arc-shaped concave and relatively moves, and said driven disc does not rotate.
Preferably, the outer end of said piston is connected with an end of piston rod, and the other end of said piston rod is connected with needle roller, and said needle roller is mobilizable to be stuck in the said groove.
Preferably, said driven disc is provided with 6 grooves.
Preferably, said groove is the U-groove bevel that extends along said driven disc radial direction from said driven disc peripheral openings.
Preferably, be provided with cylinder block in the through hole of said channel bottom, said cylinder block inner chamber forms said pump chamber, said cylinder block both ends open.
Preferably, said engaging body is a cylinder.
Preferably, said drive plate, driven disc are positioned on the base.
Technique scheme has following beneficial effect: this vacuum pump is when work, and drive plate drives its rotation by driving mechanism, and the engaging body engages with a groove after drive plate rotates to an angle; Rotation along with drive plate; The engaging body moves inward along groove gradually, and then driven plunger is inwardly mobile in pump chamber, because this moment, this pump chamber was communicated with air outlet hole; So just can the gas in this pump chamber be discharged; Meanwhile, can outwards move along the pump chamber at its place through another piston that rigid connector is connected with this piston, and this pump chamber is connected with inlet hole; This pump chamber can be inwardly air-breathing through inlet hole like this, and the drive plate that this shows this vacuum pump rotates a circle and can accomplish once process air-breathing, exhaust.This vacuum pump adopts Maltese cross movement mechanism to have high control precision, makes full use of the mode of circular movement, moves more steady; Efficient is higher, can significantly reduce the vibrations and the noise of the pump housing, and loss is less; Long service life; And need not the intake and exhaust valve block, better tightness when adopting the rotary machine structure to carry out air-breathing, exhaust can realize higher degree of vacuum.
Above-mentioned explanation only is the general introduction of the utility model technological scheme; In order more to know the technological means of understanding the utility model; And can implement according to the content of specification, below this patent is elaborated with the preferred embodiment and the conjunction with figs. of the utility model.
Description of drawings
Fig. 1 engages the view of body when engaging with groove for the utility model embodiment.
Fig. 2 is that the A-A of Fig. 1 is to sectional view.
View when Fig. 3 engages body and groove disengaging for the utility model embodiment.
Embodiment
Describe in detail below in conjunction with the preferred embodiment of accompanying drawing to the utility model.
Like Fig. 1, shown in 2, should comprise Maltese cross movement mechanism based on the vacuum displacement pump of Maltese cross movement mechanism, this Maltese cross movement mechanism comprises a base 1; Base 1 is provided with a drive plate 2 and a driven disc 3; Drive plate 2 is connected with base 1 through rotating shaft 23, drive plate 2 23 rotations around the shaft, and drive plate 2 is provided with an engaging body 21 and a cam 22; The engaging body 21 be a cylinder, the engaging body 21 and with cam 22 positioned opposite.
Between adjacent two grooves 31 of driven disc, form arc-shaped concave 34; When engaging body 21 breaks away from groove 31; Cam 22 on the drive plate 2 matches with arc-shaped concave 34, and arc-shaped concave 34 can make cam 22 and arc-shaped concave 34 relatively move as guiding face, and this moment, driven disc did not rotate; It is more steady to adopt this structure that drive plate 2, driven disc 3 are rotated, and reduces noise.
As an embodiment of the utility model, the outer end of piston 33 can also be connected with an end of piston rod, and the other end of piston rod is connected with needle roller, and needle roller is mobilizable to be stuck in the groove 31.When engaging body 21 driven plunger 33 move inward, just can change sliding friction between the two into rolling friction, thereby reach the minimizing loss, the purpose of raising the efficiency like this.
As another embodiment of the utility model, for the ease of processing, can cylinder block be set directly in the through hole of groove 31 bottoms, make this cylinder block inner chamber form pump chamber, this moment, opening was all answered at these cylinder block two ends.
Like Fig. 1, shown in 2, this vacuum pump is when work, and drive plate 2 drives its rotation by driving mechanism; Engaging body 21 engages with a groove after drive plate 2 rotates to an angle; Along with the rotation of drive plate 2, engaging body 21 moves inward along groove gradually, and then driven plunger 33 ' pump chamber 32 ' interior inside moving; Because this moment, pump chamber 32 ' be communicated with air outlet hole 37 so just can discharge this pump chamber 32 ' interior gas; Meanwhile; Outwards move with another piston 33 of this piston 33 ' be connected through rigid connector " can along the pump chamber 32 at its place "; This pump chamber 32 " is connected with inlet hole 36; " it is inwardly air-breathing to pass through inlet hole 36, and all the other four pump chambers are connected with 35 motive sealings of pole piece axle, and the pump chamber internal state remains unchanged for this pump chamber 32 like this.The drive plate that this shows this vacuum pump rotates a circle and can accomplish once air-breathing respectively and process exhaust through two relative pump chambers.
As shown in Figure 3; When engaging body 21 broke away from groove 31, cam 22 matched with arc-shaped concave 34, and arc-shaped concave 34 can make cam 22 and arc-shaped concave 34 relatively move as guiding face; This moment, driven disc 3 did not rotate; The even pole piece axle 35 of all pump chambers keeps sealing state, engages with next groove until engaging body 21, and two pump chambers of next group can carry out air-breathing accordingly, bleeding.
This vacuum pump adopts Maltese cross movement mechanism to have high control precision, makes full use of the mode of circular movement, moves more steady; Efficient is higher; Can significantly reduce the vibrations and the noise of the pump housing, loss is less, and need not the intake and exhaust valve block; Better tightness when adopting the rotary machine structure to carry out air-breathing, exhaust can realize higher degree of vacuum.
More than a kind of vacuum displacement pump that the utility model embodiment is provided based on Maltese cross movement mechanism carried out detailed introduction; For one of ordinary skill in the art; According to the utility model embodiment's thought, the part that on embodiment and application area, all can change, in sum; This description should not be construed as the restriction to the utility model, and all any changes of being made according to the utility model design philosophy are all within the protection domain of the utility model.
Claims (8)
1. the vacuum displacement pump based on Maltese cross movement mechanism comprises Maltese cross movement mechanism, and said Maltese cross movement mechanism comprises a drive plate and a driven disc; Said driven disc is provided with the even number groove, and said groove radially evenly distributes along said driven disc, and said drive plate is provided with an engaging body; When said engaging body engages with said groove; Said drive plate rotation can drive said driven disc rotation, and it is characterized in that: the bottom of said groove is provided with through hole, and said through hole forms pump chamber; Be provided with the piston that matches with it in the said pump chamber, two pistons that axis is located along the same line connect through rigid connector; Said driven disc is around rotating with a machine mandrel; Said machine mandrel is fixed; Said pump chamber is connected with the motive sealing of said pole piece axle, and said pole piece axle is provided with an inlet hole and an air outlet hole, when said engaging body engages with a groove; The corresponding pump chamber of this groove is communicated with said air outlet hole, and another pump chamber that is positioned at same axis with this pump chamber is communicated with said inlet hole.
2. the vacuum displacement pump based on Maltese cross movement mechanism according to claim 1; It is characterized in that: form arc-shaped concave between adjacent two grooves on the said driven disc; Said drive plate is provided with a cam; When said engaging body and said groove broke away from, said cam matched with said arc-shaped concave and relatively moves, and said driven disc does not rotate.
3. the vacuum displacement pump based on Maltese cross movement mechanism according to claim 1; It is characterized in that: the outer end of said piston is connected with an end of piston rod; The other end of said piston rod is connected with needle roller, and said needle roller is mobilizable to be stuck in the said groove.
4. the vacuum displacement pump based on Maltese cross movement mechanism according to claim 1 is characterized in that: said driven disc is provided with 6 grooves.
5. the vacuum displacement pump based on Maltese cross movement mechanism according to claim 1 is characterized in that: the U-groove bevel of said groove for extending along said driven disc radial direction from said driven disc peripheral openings.
6. the vacuum displacement pump based on Maltese cross movement mechanism according to claim 1 is characterized in that: be provided with cylinder block in the through hole of said channel bottom, said cylinder block inner chamber forms said pump chamber, said cylinder block both ends open.
7. the vacuum displacement pump based on Maltese cross movement mechanism according to claim 1 is characterized in that: said engaging body is a cylinder.
8. the vacuum displacement pump based on Maltese cross movement mechanism according to claim 1 is characterized in that: said drive plate, driven disc are positioned on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205127373U CN202370780U (en) | 2011-12-12 | 2011-12-12 | Positive displacement vacuum pump based on Maltese cross movement mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205127373U CN202370780U (en) | 2011-12-12 | 2011-12-12 | Positive displacement vacuum pump based on Maltese cross movement mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202370780U true CN202370780U (en) | 2012-08-08 |
Family
ID=46594485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205127373U Withdrawn - After Issue CN202370780U (en) | 2011-12-12 | 2011-12-12 | Positive displacement vacuum pump based on Maltese cross movement mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202370780U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392809A (en) * | 2011-12-12 | 2012-03-28 | 苏州盟通利机电设备有限公司 | Vacuum displacement pump based on Maltese cross movement mechanism |
| CN105804968A (en) * | 2014-12-29 | 2016-07-27 | 深圳富泰宏精密工业有限公司 | Traction type vacuum pump |
-
2011
- 2011-12-12 CN CN2011205127373U patent/CN202370780U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392809A (en) * | 2011-12-12 | 2012-03-28 | 苏州盟通利机电设备有限公司 | Vacuum displacement pump based on Maltese cross movement mechanism |
| CN102392809B (en) * | 2011-12-12 | 2014-06-04 | 苏州盟通利机电设备有限公司 | Vacuum displacement pump based on Maltese cross movement mechanism |
| CN105804968A (en) * | 2014-12-29 | 2016-07-27 | 深圳富泰宏精密工业有限公司 | Traction type vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120808 Effective date of abandoning: 20140604 |
|
| RGAV | Abandon patent right to avoid regrant | ||
| DD01 | Delivery of document by public notice |
Addressee: Suzhou mactuni Electromechanical Equipment Co., Ltd. financial Document name: Notification of Approving Refund |