CN204663265U - Pneumatic rotary revolving door pump - Google Patents
Pneumatic rotary revolving door pump Download PDFInfo
- Publication number
- CN204663265U CN204663265U CN201520209952.4U CN201520209952U CN204663265U CN 204663265 U CN204663265 U CN 204663265U CN 201520209952 U CN201520209952 U CN 201520209952U CN 204663265 U CN204663265 U CN 204663265U
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- CN
- China
- Prior art keywords
- door
- pitch
- screw
- screw mandrel
- pneumatic rotary
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of pneumatic rotary revolving door pump, comprise: door-hinge, cylinder, transmission nut, leading screw, air valve, door-hinge is connected with transmission nut, and leading screw is directly connected with cylinder piston rod, and the pitch of the screw thread of described screw mandrel mid portion is less than the pitch of screw mandrel both ends screw thread.Advantage is, has buffering effect when opening or close, and without impacting, noise is little, and cost is low, dependable performance.
Description
Technical field
The present invention relates to a kind of Pump for door of bus, particularly relate to a kind of passenger vehicle externally swing Pneumatic rotary door pump.
Background technology
Along with the fast development of bus industry, Outer turning service door system is safe and reliable, easy to operate, selected by increasing passenger vehicle producer.The opening and closing of door for coach are driven by door pump, and the application of revolving door pump is more.The pneumatic rotary revolving door pump of prior art utilizes large pitch leading screw not latching characteristics, leading screw is directly connected with driving cylinder piston rod, be the rotary motion of transmission nut piston linear movement transition, thus drive door-hinge, support arm to rotate, passenger doors is closed or opens.The rotary speed that the rate of climb of door pump cylinder piston and car door swing utilizes the expansion screw be arranged on a pump cylinder to regulate, at whole story of a stroke action without buffer.If it is too low that admission pressure is adjusted, a pump action can be caused too slow, and the switch gate time is oversize, door can be made to be subject to sudden surge instantaneously in opening and closing and to sustain damage if pressure is heightened, clamping force is too large, and door closing speed is too fast, during enabling, door pump impact noise is very large, there is potential safety hazard.
Summary of the invention
Technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art, and without impact when providing a kind of unlatching or close, noise is little, the pneumatic rotary revolving door pump of dependable performance.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is: a kind of pneumatic rotary revolving door pump, it comprises: door-hinge, cylinder, transmission nut, leading screw, air valve, door-hinge is connected with transmission nut, leading screw is directly connected with cylinder piston rod, and the pitch of the screw thread of described screw mandrel mid portion is less than the pitch of screw mandrel both ends screw thread.
A kind of prioritization scheme of such scheme is: on described screw mandrel, the pitch of the screw thread at both ends is not more than 3 times of the minimum pitch of screw thread on screw mandrel.
The beneficial effect adopting technique scheme to produce is: leading screw is directly connected with driving cylinder piston rod, be the rotary motion of transmission nut piston linear movement transition, when starting and be about to close, thread pitch is larger, piston linear motion drives the rotary speed of transmission nut less, plays cushioning effect; In the interstage, pitch is less, drives rotating speed comparatively large, can ensure that car door was closed in the shorter time.Adopt pneumatic rotary revolving door pump of the present utility model, without impact when opening or close, noise is little, and cost is low, dependable performance.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
1. cylinders, 2. nut, 3. screw mandrel, 4. screw thread, 5. air valve in figure.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is further elaborated.
As shown in Figure 1, a kind of pneumatic rotary revolving door of the utility model pump, comprise: door-hinge, cylinder 1, transmission nut 2, leading screw 3, air valve 5, door-hinge is connected with transmission nut 2, leading screw is directly connected with cylinder piston rod, it is characterized in that: during action, the pitch of whole screw threads 4 that leading screw 3 contacts with transmission nut 2 changes.
The pitch of the screw thread at screw thread 4 both ends is 2 to 3 times of interlude thread pitch.Leading screw is directly connected with driving cylinder piston rod, is the rotary motion of transmission nut piston linear movement transition, and when starting and be about to close, thread pitch is comparatively large, and piston linear motion drives the rotary speed of transmission nut less, plays cushioning effect; In the interstage, pitch is less, drives rotating speed comparatively large, can ensure that car door was closed in the shorter time.
Claims (2)
1. a pneumatic rotary revolving door pump, it comprises: door-hinge, cylinder (1), transmission nut (2), screw mandrel (3), air valve (5), door-hinge is connected with transmission nut (2), screw mandrel is directly connected with cylinder piston rod, it is characterized in that: the pitch of the screw thread (4) of described screw mandrel (3) mid portion is less than the pitch at screw mandrel (3) both ends screw thread (4).
2. pneumatic rotary revolving door pump according to claim 1, is characterized in that: the pitch of the screw thread (4) at the upper both ends of described screw mandrel (3) is not more than 3 times of the minimum pitch of the upper screw thread (4) of screw mandrel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209952.4U CN204663265U (en) | 2015-04-09 | 2015-04-09 | Pneumatic rotary revolving door pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520209952.4U CN204663265U (en) | 2015-04-09 | 2015-04-09 | Pneumatic rotary revolving door pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204663265U true CN204663265U (en) | 2015-09-23 |
Family
ID=54133657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520209952.4U Expired - Fee Related CN204663265U (en) | 2015-04-09 | 2015-04-09 | Pneumatic rotary revolving door pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204663265U (en) |
-
2015
- 2015-04-09 CN CN201520209952.4U patent/CN204663265U/en not_active Expired - Fee Related
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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: 20150923 Termination date: 20160409 |