CN201661436U - Screw reversing pneumatic pump - Google Patents
Screw reversing pneumatic pump Download PDFInfo
- Publication number
- CN201661436U CN201661436U CN2010201300424U CN201020130042U CN201661436U CN 201661436 U CN201661436 U CN 201661436U CN 2010201300424 U CN2010201300424 U CN 2010201300424U CN 201020130042 U CN201020130042 U CN 201020130042U CN 201661436 U CN201661436 U CN 201661436U
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- China
- Prior art keywords
- top cover
- cylinder
- air port
- commutation
- rodless cavity
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- Expired - Fee Related
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- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
The utility model discloses a screw reversing pneumatic pump. The upper end plane of an air cylinder is symmetrically provided with air inlets which are communicated with the upper cavity and the lower cavity of the air cylinder. The bottom of a piston in the air cylinder is connected with a hollow piston rod. The lower end of the air cylinder is provided with a bottom cover. The lower end plane of a top cover is provided with the symmetrical air inlets which are connected with a compressed air inlet. The lower end of the top cover is further provided with symmetrical exhaust orifices. The top cover presses the upper end of the air cylinder tightly. A reversing screw is arranged in the hollow piston rod, the upper part of which is provided with the threads with large intervals. The screw penetrates through the central hole of the top cover, in which the threads with the large intervals are arranged. Threads on the screw mesh with the threads in the top cover central hole. A reversing bolt is driven by the piston to move vertically; consequently the top cover is driven to rotate horizontally within a small angle and the switching of the communication state of the air inlets at the lower end plane of the top cover and the two air inlets at the top end of the air cylinder is realized. The utility model has the advantages of compact structure, low manufacture cost, stable and reliable work, small collision and low noise and adopts the high speed screw to realize reversing movement.
Description
Technical field
The utility model relates to a kind of pneumatic pump, relates in particular to a kind of pneumatic pump that utilizes the screw rod commutation.
Background technique
As power source, by the flow direction of distribution reversing arrangement control pressurized gas, pressurized gas drives the motion of cylinder piston to pneumatic pump, realizes the function of outputting reciprocating linear movement with pressurized gas.The power source of pneumatic pump Chang Zuowei high pressure airless spray equipment etc.According to the difference of present distribution reversing arrangement, pneumatic pump can be divided into two big classes: a class adopts air operated reversing valve control pressurized gas to flow to, and another kind of employing mechanical commutation mechanism controls pressurized gas flows to.
Chinese patent 200520091320.9 disclosed a kind of novel pneumatic pump and spraying machines thereof, adopt air operated reversing valve control pressurized gas to flow to, comprise master cylinder, main piston, pilot valve I, pilot valve II, selector valve, distribution piece, pilot valve I and pilot valve II communicate with change-over valve core two ends cavity respectively, selector valve links to each other with the distribution piece, by selector valve and distribution piece control cylinder intake duct.It is characterized in that: be provided with outlet valve, outlet valve is in parallel with described selector valve, the spool of outlet valve and the interlock of the spool of selector valve, the air outlet flue of the spool control master cylinder of outlet valve.
Above-mentioned pneumatic pump and spraying machine stable working thereof, the precision height, noise is little, but exist manufacture difficulty big, cost height, and shortcoming such as spool is easy to wear.
The disclosed a kind of pneumatic pump of Chinese patent 200820164523.X, adopt mechanical commutation mechanism controls pressurized gas to flow to, comprise cylinder and changement, changement comprises valve seat, reversing bar, commutation slide block, commutation slip ring, valve seat, the sidewall of valve seat is provided with three transversely arranged windows, and middle window is communicated with the suction port on the valve seat, and two window distributions at two ends are communicated with epicoele and cavity of resorption; The commutation slip ring is embedded in the commutation slide block on the sidewall of window, and commutation slip ring center is installed with two ends makes the commutation slip ring be close to the stage clip of valve seat sidewall against commutation slide block and commutation slip ring inwall respectively; The reversing bar top contacts with the commutation slide block, can promote the slide block horizontal slip that commutates during with piston rod movement, is provided with between commutation slide block and the valve seat to make the commutation slide block move horizontally the Returnning spring that resets.
Above-mentioned pneumatic pump exists wearing and tearing in commutation process big, the shortcoming of the big grade of noise, and stability, the accuracy of its commutation motion all have much room for improvement.
Summary of the invention
The purpose of this utility model is to provide a kind of pneumatic pump that utilizes the screw rod commutation, is the pneumatic pump that utilizes screw drive to commutate.
The technical solution adopted in the utility model is:
Comprise cylinder and changement; Wherein:
1) described cylinder: be provided with piston in the cylinder, the piston lower end is connected with the piston rod of hollow, piston is divided into cylinder rodless cavity and cylinder rod chamber with cylinder, the cylinder top is provided with adjacent rodless cavity air port and rod chamber air port, the rodless cavity air port is communicated with the cylinder rodless cavity by the rodless cavity intake duct, and the rod chamber air port is communicated with the cylinder rod chamber by the rod chamber intake duct; Center, cylinder top is provided with the center hole that runs through the top, and cylinder chassis is installed in the cylinder bottom surface;
2) described changement: comprise top cover, commutation screw rod and hold-down bolt; Top cover is provided with the center hole that runs through, be provided with screw thread in the center hole, the same diameter of top cover is provided with four arcuate guide grooves of equidistant placement, it is the top cover air port of one group of symmetric arrangement that the top cover lower end surface is provided with two, the top cover air port is communicated with the compressed gas source suction port through the top cover intake duct, respectively there is a top cover relief opening each both sides, top cover air port, the rodless cavity air port that spacing between top cover air port and each the top cover relief opening is adjacent with the cylinder top is identical with the spacing in rod chamber air port, four arcuate guide grooves that described hold-down bolt passes top cover are pressed in the cylinder top with top cover, after in the described commutation screw rod block being housed, place the piston rod of hollow, commutation screw rod top is provided with screw thread, pass the center hole on the top cover, screw thread on the commutation screw rod and the thread engagement in the top cap central bore, the piston rod of interior dress commutation screw rod passes cylinder chassis, the commutation screw rod is done the vertical line motion with piston, the drive top cover is done and is horizontally rotated motion, and the top cover air port of switching symmetric arrangement is communicated with rodless cavity air port and rod chamber air port respectively.
Described rod chamber air port and rodless cavity air port respectively have two, intersect to be arranged symmetrically in the cylinder top.
The beneficial effect that the utlity model has is:
It is that the motion that horizontally rotates of top cover realizes commutation function with the vertical line conversion of motion of screw rod that the utility model adopts the screw rod that commutates at a high speed, has guaranteed the stationarity and the accuracy of commutation process.For guaranteeing carrying out smoothly of conversion of motion, screw thread and the screw thread in the top cap central bore on the screw rod all are set to big space-threaded.Top cover is an inlet valve seat, also plays a part the commutation slide block simultaneously, and such design makes structure simpler, compact, has saved cost.The adjacent setting of rod chamber suction port of cylinder upper end with the rodless cavity suction port, so top cover only need rotate very little angle and can realize commutation, reduced energy loss.
In a word, the utility model is simple and compact for structure, low cost of manufacture, owing to adopt high-speed screws to realize the commutation motion, stable working is reliable, collides for a short time, and noise is low.
Description of drawings
Fig. 1 is the explosive view of the utility model pneumatic pump.
Fig. 2 is the sectional drawing of the utility model pneumatic pump.
Fig. 3 is the sectional drawing of the utility model pneumatic pump cylinder.
Fig. 4 is the plan view of the utility model pneumatic pump cylinder.
Fig. 5 is the plan view of the utility model pneumatic pump top cover.
Fig. 6 is the worm's eye view of the utility model pneumatic pump top cover.
Fig. 7 is the sectional drawing of the utility model pneumatic pump top cover.
Among the figure: 1, cylinder, 2, the commutation screw rod, 3, hold-down bolt, 4, top cover, 5, piston, 6, cylinder chassis, 7, block, 8, screw, 9, the rodless cavity air port, 10, rod chamber air port, 11, the rodless cavity intake duct, 12, the rod chamber intake duct, 13, compressed gas source suction port, 14, center hole, 15, the arcuate guide groove, 16, top cover relief opening, 17, top cover air port, 18, screw thread, 19, the cylinder rodless cavity, 20, cylinder rod chamber, 21, piston rod, 22, holddown spring, 23, screw thread, 24, center hole, 25, the top cover intake duct.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1 and Figure 2, the utility model comprises cylinder 1 and changement; Wherein:
1) described cylinder 1: be provided with piston 5 in the cylinder 1, piston 5 lower ends are connected with the piston rod 21 of hollow, piston 5 is divided into cylinder rodless cavity 19 and cylinder rod chamber 20 with cylinder, cylinder 1 top is provided with adjacent rodless cavity air port 9 and rod chamber air port 10, rodless cavity air port 9 is communicated with cylinder rodless cavity 19 by rodless cavity intake duct 11, rod chamber air port 10 is communicated with cylinder rod chamber 20 by rod chamber intake duct 12, as shown in Figure 3; Center, cylinder 1 top is provided with the center hole 24 that runs through the top, and cylinder chassis 6 is installed in cylinder 1 bottom surface.
2) described changement: comprise top cover 4, commutation screw rod 2 and hold-down bolt 3; As shown in Figure 5, top cover 4 is provided with the center hole 14 that runs through, and is provided with screw thread 23 (as shown in Figure 7) in the center hole 14, and top cover 4 same diameters are provided with four arcuate guide grooves 15 that run through of equidistant placement; As shown in Figure 6, it is the top cover air port 17 of one group of symmetric arrangement that top cover 4 lower end surfaces are provided with two, top cover air port 17 is communicated with compressed gas source suction port 13 through top cover intake duct 25, respectively there is a top cover relief opening 16 each 17 both sides, top cover air port, the rodless cavity air port 9 that spacing between top cover air port 17 and each the top cover relief opening 16 is adjacent with cylinder 1 top is identical with the spacing in rod chamber air port 10, four arcuate guide grooves 15 that described hold-down bolt 3 passes top cover 4 are pressed in cylinder 1 top with top cover 4, top cover 4 can be done in the scope that arcuate guide groove 15 is retrained and horizontally rotate motion simultaneously, and hold-down bolt 3 is provided with holddown spring 22.After in the described commutation screw rod 2 block 7 being housed, place the piston rod 21 of hollow, commutation screw rod 2 tops are provided with screw thread 18, behind the center hole 24 by cylinder 1, pass the center hole 14 on the top cover 4, screw thread 18 on the commutation screw rod 2 and 23 engagements of the screw thread in the top cap central bore 14, the piston rod 21 of interior dress commutation screw rod 2 passes cylinder chassis 6, when piston 5 moves upward to the upper inclined surface of commutation screw rod 2, driving commutation screw rod 2 moves upward, when piston 5 moves downward the position of block 7 of commutation screw rod 2, driving commutation screw rod 2 moves downward, because screw thread 18 on the commutation screw rod 2 and 23 engagements of the screw thread in the center hole 14 on the top cover 4, so the conversion of motion of vertical line up and down of the screw rod 2 that commutates is the motion that horizontally rotates of top cover 4, for guaranteeing successfully to realize conversion of motion in the high-speed motion, commutation screw rod 2 adopts high-speed screws, and the screw thread 23 that is provided with in screw thread 18 on the commutation screw rod 2 and the center hole on the top cover 4 in 14 is big space-threaded.The horizontally rotating motion and will switch the top cover air port 17 of symmetric arrangement and be communicated with rodless cavity air port 9 and rod chamber air port 10 respectively of top cover 4, when top cover air port 17 is communicated with rodless cavity air port 9,19 air inlets of cylinder rodless cavity, top cover relief opening 16 is communicated with rod chamber air port 10, discharge the gas in the rod chamber, when top cover air port 17 is communicated with rod chamber air port 10,20 air inlets of cylinder rod chamber, top cover relief opening 16 is communicated with rodless cavity air port 9, discharges the gas in the rodless cavity.
As shown in Figure 4, rod chamber air port 10 on the described cylinder 1 and rodless cavity air port 9 respectively have two, intersect and be arranged symmetrically in cylinder 1 top, the every pair of rod chamber air port 10 and rodless cavity air port 9 adjacent layouts, the function that the top cover air port 17 that makes 4 of top covers need very little angle of rotation just can realize switching symmetric arrangement is communicated with rodless cavity air port 9 and rod chamber air port 10 respectively.
Pneumatic pump working principle of the present utility model is as follows:
Pressurized air enters top cover 4 from compressed gas source suction port 13, enters two rodless cavity air ports 9 on the cylinder 1 by two top cover air ports 17, enters cylinder rodless cavity 19 by rodless cavity intake duct 11, and pressurized air promotes piston 5 and moves downward.When piston 5 moves to the bottom, run into the block 7 of commutation screw rod 2 bottoms, driving commutation screw rod 2 moves downward, commutation screw rod 2 is done by thread engagement drive top cover 4 and is horizontally rotated motion, two top cover air ports 17 on the top cover 4 are communicated with two rod chamber air ports 10 on the cylinder 1, pressurized air enters cylinder rod chamber 20 by rod chamber intake duct 12, promotes piston 5 and moves upward.This moment, two top cover relief openings 16 on the top cover 4 were communicated with the gas in the discharge rodless cavity 19 with two rodless cavity air ports 9 on the cylinder 1.When piston 5 moves to the top, run into the inclined-plane on commutation screw rod 2 tops, driving commutation screw rod 2 moves upward, commutation screw rod 2 drive top covers 4 are done and are oppositely horizontally rotated motion, two top cover air ports 17 on the top cover 4 are communicated with two rodless cavity air ports 9 on the cylinder 1, and pressurized air enters the cylinder rodless cavity 19 of cylinder 1, promote piston 5 and move downward, two top cover relief openings 16 on the top cover 4 are communicated with two rod chamber air ports 10 on the cylinder 1, discharge the gas in the cylinder rodless cavity 20 of cylinder 1.Repeat said process, pneumatic pump is by piston rod 21 outputting reciprocating linear movements.
Claims (2)
1. a pneumatic pump that utilizes the screw rod commutation is characterized in that, comprises cylinder (1) and changement; Wherein:
1) described cylinder (1): be provided with piston (5) in the cylinder (1), piston (5) lower end is connected with the piston rod (21) of hollow, piston (5) is divided into cylinder rodless cavity (19) and cylinder rod chamber (20) with cylinder, cylinder (1) top is provided with adjacent rodless cavity air port (9) and rod chamber air port (10), rodless cavity air port (9) is communicated with cylinder rodless cavity (19) by rodless cavity intake duct (11), and rod chamber air port (10) are communicated with cylinder rod chamber (20) by rod chamber intake duct (12); Cylinder (1) center, top is provided with the center hole (24) that runs through the top, and cylinder chassis (6) is installed in cylinder (1) bottom surface;
2) described changement: comprise top cover (4), commutation screw rod (2) and hold-down bolt (3); Top cover (4) is provided with the center hole (14) that runs through, be provided with screw thread (23) in the center hole (14), the same diameter of top cover (4) is provided with four arcuate guide grooves (15) of equidistant placement, it is the top cover air port (17) of one group of symmetric arrangement that top cover (4) lower end surface is provided with two, top cover air port (17) is communicated with compressed gas source suction port (13) through top cover intake duct (25), respectively there is a top cover relief opening (16) each both sides, top cover air port (17), the rodless cavity air port (9) that spacing between top cover air port (17) and each the top cover relief opening (16) is adjacent with cylinder (1) top is identical with the spacing of rod chamber air port (10), four arcuate guide grooves (15) that described hold-down bolt (3) passes top cover (4) are pressed in cylinder (1) top with top cover (4), after block (7) is housed in the described commutation screw rod (2), place the piston rod (21) of hollow, commutation screw rod (2) top is provided with screw thread (18), pass the center hole (14) on the top cover (4), screw thread (18) on the commutation screw rod (2) and the engagement of the screw thread (23) in the top cap central bore (14), the piston rod (21) of interior dress commutation screw rod (2) passes cylinder chassis (6), commutation screw rod (2) is done the vertical line motion with piston (5), drive top cover (4) is done and is horizontally rotated motion, and the top cover air port (17) of switching symmetric arrangement is communicated with rodless cavity air port (9) and rod chamber air port (10) respectively.
2. a kind of pneumatic pump that utilizes the screw rod commutation according to claim 1, it is characterized in that: described rod chamber air port (10) and rodless cavity air port (9) respectively have two, intersect to be arranged symmetrically in cylinder (1) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201300424U CN201661436U (en) | 2010-03-15 | 2010-03-15 | Screw reversing pneumatic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201300424U CN201661436U (en) | 2010-03-15 | 2010-03-15 | Screw reversing pneumatic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201661436U true CN201661436U (en) | 2010-12-01 |
Family
ID=43231852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201300424U Expired - Fee Related CN201661436U (en) | 2010-03-15 | 2010-03-15 | Screw reversing pneumatic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201661436U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799000A (en) * | 2010-03-15 | 2010-08-11 | 浙江大学 | Pneumatic pump reversed by using screw rod |
| CN102852752A (en) * | 2012-03-23 | 2013-01-02 | 宁波大学 | Pneumatic pump |
-
2010
- 2010-03-15 CN CN2010201300424U patent/CN201661436U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799000A (en) * | 2010-03-15 | 2010-08-11 | 浙江大学 | Pneumatic pump reversed by using screw rod |
| CN102852752A (en) * | 2012-03-23 | 2013-01-02 | 宁波大学 | Pneumatic pump |
| CN102852752B (en) * | 2012-03-23 | 2015-01-21 | 宁波大学 | Pneumatic pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20120315 |