CN205533239U - Automobile vacuum pump - Google Patents
Automobile vacuum pump Download PDFInfo
- Publication number
- CN205533239U CN205533239U CN201620295295.4U CN201620295295U CN205533239U CN 205533239 U CN205533239 U CN 205533239U CN 201620295295 U CN201620295295 U CN 201620295295U CN 205533239 U CN205533239 U CN 205533239U
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- China
- Prior art keywords
- gear
- vacuum pump
- central shaft
- packing ring
- pump
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses an automobile vacuum pump, its technical scheme main points are including the pump body (1), pump cover (2) and run through center pin (3) of the pump body (1), pump cover (2), center pin (3) are gone up the cover and are equipped with gear (4), the both sides that lie in gear (4) on center pin (3) are equipped with baffle (5), baffle (5) are gone up and extend packing ring (6) that have with the laminating of gear (4) lateral wall on the axis directions towards gear (4), in operation, the cover is equipped with drive chain on the gear, when the auto steering is frequent, the car shake was serious this moment, drive chain drops from the gear easily, the baffle of both sides plays the effect of blockking to drive chain, prevent that drive chain from droing from the gear, wearing and tearing between the lateral wall of reducible drive chain of packing ring and baffle, the life of extension baffle.
Description
Technical field
This utility model relates to the fluid varactor machine of a kind of rotary-piston or oscillating-piston, particularly to a kind of automobile vacuum pump.
Background technology
Along with developing rapidly of World Auto Industry, petrol engine produces higher vacuum pressure by inlet manifold, can meet self demand to brake force；And along with the application of Diesel engine is increasingly extensive, Diesel engine the most increasingly favored by compact car, small displacement diesel engine arises at the historic moment, the requirement of the diesel engine air exercise tolerance of small displacement is little, if adopting traditional air compressor machine, can cause waste and also air compressor machine fault rate is high, service life is short, use vacuum pump replacement air compressor machine imperative.But, general vacuum pump uses drive sleeve transmission, and transmission efficiency is low, poor reliability, and assembly performance is the most poor, and owing to return line is shorter, installing space is limited, the bad problem such as fixing.
At present, in prior art, Authorization Notice No. is that the Chinese patent of CN 202250533U discloses a kind of high-pressure oil pump of engine and vacuum pump drive assembly, including high-pressure oil pump, vacuum pump, drive sprocket, chain, drive shaft and pump seat, described high-pressure oil pump and vacuum pump integrated installation are on pump seat, it is arranged in the left front position of engine cylinder-body, described drive sprocket is positioned at foremost, forms transmission with the chain driven by crankshaft sprocket.This vacuum pump structure is compact stable, it is simple to the electromotor layout in car body cabin and lift-launch.
But, it there is also the deficiency of self, and geared sleeve is located on pump central shaft, when driver travels on some many mountain pass roads, needs frequently to turn, and automobile occurs acutely to shake accordingly, the transmission band landing from gear being easily caused on gear, causes security incident.
Utility model content
The purpose of this utility model is to provide a kind of avoids transmission band automobile vacuum pump of landing from gear.
Above-mentioned technical purpose of the present utility model has the technical scheme that
A kind of automobile vacuum pump, including the pump housing, pump cover and the central shaft running through the pump housing, pump cover, being arranged with gear on central shaft, the both sides that described central shaft is positioned at gear are provided with baffle plate, and baffle plate is being extended with and the packing ring of gear sidewall laminating on the axis direction of gear.
By using technique scheme, it is provided with baffle plate in the both sides of gear, during work, driving chain it is arranged with on gear, when motor turning is frequent, now automobile shake is serious, and driving chain easily splits away off from gear, driving chain is played barrier effect by the baffle plate of both sides, prevents driving chain from coming off from gear；Space is left between gear and baffle plate, it is being extended with on the axial direction of gear and the packing ring of gear sidewall laminating on baffle plate, packing ring can reduce the abrasion between driving chain and the sidewall of baffle plate, extends the service life of baffle plate, thus ensures the serviceability of this automobile vacuum pump.
This utility model is further arranged to: the diameter of described baffle plate is more than the tooth top diameter of a circle of gear.
By using technique scheme, the diameter of baffle plate is more than the tooth top diameter of a circle of gear, mean when baffle-plate-sleeve is located at the both sides of gear, the height of baffle plate is higher than the peak of gear, when driving chain on gear under lateral sliding time, driving chain is played effective barrier effect by baffle plate, reduces the amplitude of driving chain left and right shake on gear, prevent driving chain landing from gear from getting off, it is ensured that driving chain stability on gear and fluency.
This utility model is further arranged to: the diameter of described packing ring is less than the tooth root diameter of a circle of gear.
By using technique scheme, the diameter of packing ring is less than the tooth root diameter of a circle of gear, the height of packing ring is less than the horizontal plane at root circle place, when driving chain is set on gear, also having space between driving chain and central shaft, packing ring fills up this space just, is equivalent to not leave space to around driving chain, further enhance driving chain stability of transmission on gear, ensure the trouble free service of automobile vacuum pump.
This utility model is further arranged to: be provided with elastomeric pad between described packing ring and central shaft.
By using technique scheme; elastomeric pad it is provided with between packing ring and central shaft; packing ring is all that hard stainless steel material is made with central shaft; together with packing ring can not fit tightly with the cooperation of central shaft; otherwise both can produce the biggest frictional force and cause damage, and first sheathed elastomeric pad, sheathed packing ring on elastomeric pad on center shaft; play chip shield with central shaft from the effect of abrasion, extend the service life of automobile vacuum pump.
This utility model is further arranged to: the thickness of described packing ring is less than the thickness of gear.
By using technique scheme, the thickness thickness less than gear of packing ring is set, if driving chain separates with gear, then can drop on packing ring, when the thickness of packing ring is less than the thickness of gear, then the driving chain dropped can be stopped by baffle plate, it is to avoid landing causes the accident.
This utility model is further arranged to: described pump cover includes that main part, main part are provided with the auxiliary section being halved together with main part.
By using technique scheme, pump cover includes main part and auxiliary section, and main part is directly covered on the pump housing, in order to preferably and central shaft is suitable, arranging the auxiliary section being halved together with main part on main part, the auxiliary section of interlocking is higher with the fitness of central shaft；Pump cover is casting integrated molding, but it is the most rough surface of cast member, uneven, auxiliary section is the parts that the smoothness being processed into through milling cutter is higher, can increase the fitness of automobile vacuum pump and miscellaneous part as convenient the aliging and installing with miscellaneous part of datum level.
This utility model is further arranged to: be arranged with sealing ring between described auxiliary section and central shaft.
By using technique scheme; sealing ring is set between auxiliary section and central shaft; auxiliary section is aluminum alloy materials; central shaft is stainless steel material; both is hard material, if laminating is closely, can rub, cause interface to wear and tear; arranging sealing ring then can avoid auxiliary section to contact with the direct of central shaft, plays a protective role；Sealing ring has elasticity simultaneously, can slow down the vibration suffered by vacuum pump, it is ensured that the stability in use of vacuum pump.
This utility model is further arranged to: described auxiliary section is provided with epitaxy part in the radial direction along central shaft.
By using technique scheme, being provided with epitaxy part in auxiliary section in the radial direction along central shaft, epitaxy part is for increasing the area of auxiliary section and main part interlocking, it is ensured that auxiliary section is connected tightr with main part.
This utility model is further arranged to: the quantity of described epitaxy part at least 3, and each epitaxy part includes annular end, and the same side end face of annular end is in same plane.
By using technique scheme, the quantity of epitaxy part at least 3, annular end is included on each epitaxy part, the same side end face of annular end determines a plane, this plane can be used as datum level convenient coordinating with miscellaneous part, replace the mode using milling cutter to process whole surface, be greatly saved aluminum liquid, thus reduce cost.
This utility model is further arranged to: on described gear, the surface with chain contact is provided with tungsten carbide wear resistant layer.
By using technique scheme, tungsten carbide superhard alloy thermal coefficient of expansion is little, there are higher heat conductivity and coefficient of elasticity, it it is a kind of good friction pair material, surface configuration tungsten carbide wear resistant layer at gear Yu chain contact, then can increase the anti-wear performance on this surface, reduce abrasion rack surface caused because of friction, extend the service life of gear.
In sum, this utility model has the advantages that 1. anti-driving chain landings: arranging baffle plate in the both sides of gear, driving chain is played barrier effect by baffle plate, prevents driving chain landing from gear；2. extended on baffle plate have packing ring, packing ring can avoid baffle plate to contact with the direct of driving chain, reduce abrasion, ensure the serviceability of this baffle plate, meanwhile, arranging elastomeric pad between packing ring and central shaft, elastomeric pad is for reducing the sharp wear of packing ring and central shaft, avoid causing the damage of packing ring, extend the service life of this vacuum pump.
Accompanying drawing explanation
Fig. 1 is the structural representation of vacuum pump；
Fig. 2 is the decomposing schematic representation of vacuum pump；
Fig. 3 is the structural representation of pump cover.
Reference: 1, the pump housing；2, pump cover；21, main part；22, auxiliary section；221, epitaxy part；2211, annular end；222, lobe；3, central shaft；4, gear；5, baffle plate；6, packing ring；7, elastomeric pad；8, sealing ring；9, tungsten carbide wear resistant layer.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail.
Embodiment one:
As it is shown in figure 1, a kind of automobile vacuum pump, including the pump housing 1, pump cover 2 and central shaft 3.Pump cover 2 and the pump housing 1 are all aluminium alloy compression castings, the most rough surface of die casting, and precision is the highest, process auxiliary section 22 on pump cover 2 surface through milling cutter, and auxiliary section 22 improves the fitness of this vacuum pump and other parts.
As shown in Figure 2, it is arranged with gear 4 on central shaft 3 at automobile vacuum pump and the direction near auxiliary section 22, the both sides of gear 4 are provided with baffle plate 5, the outer shape of baffle plate 5 is circular, with central shaft 3 contact portion be shaped as hexagon, this hexagon is sticked in central shaft 3 outer wall just, under normal circumstances, it is arranged with driving chain on gear 4, driving chain driven gear 4 high speed rotating, gear 4 drives central shaft 3 directional-rotation, and central shaft 3 drives the baffle plate 5 being set on central shaft 3 to rotate, it is to say, baffle plate 5 rotates together with gear 4；The outside diameter of a circle tooth top diameter of a circle more than gear 4 of baffle plate 5 is set, when being arranged with driving chain on gear 4, driving chain is specifically set on outside circle, if the diameter of baffle plate 5 is less than tooth top diameter of a circle, then driving chain can not be played barrier effect, i.e. can not play the effect preventing driving chain landing, so the diameter of baffle plate 5 needs more than tooth top diameter of a circle.
As shown in Figure 2, baffle plate 5 is extended with, on the axis direction of gear 4, the packing ring 6 fitted with gear 4 sidewall, packing ring 6 be shaped as annular, when driving chain is set on gear 4, driving chain and central shaft 3 still leave space, arrange packing ring 6 and just make up the space left, reduce the abrasion between driving chain and baffle plate 5, driving chain is played a supporting role, prevents the lateral sliding of driving chain further；The diameter of packing ring 6 is set less than tooth root diameter of a circle, when driving chain is set on gear 4, the minimum point that driving chain can reach is root circle, if the height of packing ring 6 is higher than the height of root circle, then can affect the normal work of driving chain, easily cause the fault of driving chain on the contrary；The thickness thickness less than gear 4 of packing ring 6 is set, when driving chain from gear 4, get off by sliding, if the thickness of packing ring 6 is more than the thickness of gear 4, then driving chain can drop completely on packing ring 6 sidewall, baffle plate 5 does not has barrier effect, make baffle plate 5 effect lose efficacy, and the thickness of packing ring 6 less than the thickness of gear 4 time, then baffle plate 5 can play baffle plate 5 and acts on.Central shaft 3 high speed rotating can rotate by band washer 6, packing ring 6 contacts for face with central shaft 3, big with the contact area of central shaft 3 compared to baffle plate 5, it is to avoid packing ring 6 and central shaft 3 occur sharp wear, between packing ring 6 and central shaft 3, plug is provided with elastomeric pad 7, elastomeric pad 7 is annular, material is elastomeric material, has certain elasticity, rotates with central shaft 3 and band washer 6, reduce unnecessary abrasion, extend the service life of vacuum pump.
As shown in Figure 3, pump cover 2 is made up of two parts, a part is the main part 21 matched with the pump housing 1, main part 21 is connected by screw is fixing with the pump housing 1, another part is in the higher auxiliary section 22 of main part 21 surface glazing slippery through milling cutter Milling Machining, auxiliary section 22 is extended with epitaxy part 221 in the radial direction along central shaft 3, epitaxy part 221 is provided with 3, epitaxy part 221 adds the interlocking area of auxiliary section 22 and main part 21, increase the fitness of auxiliary section 22 and main part 21, auxiliary section 22 is made to be connected tightr with main part 21, epitaxy part 221 includes annular end 2211, annular end 2211 is arranged on three drift angles of main part 21, screw is then arranged in the inner circle of annular end 2211, achieve a fixed connection with the pump housing 1；The end face of three annular end 2211 determines a highest datum level of smoothness, and this datum level is for coordinating with the accurate of miscellaneous part；Being additionally provided with lobe 222 on auxiliary section 22, lobe 222 is annular, is sheathed on central shaft 3, and being equivalent to axle sleeve can be higher with the fitness of the pump housing 1 part by central shaft 3, facilitates pump cover 2 preferably to coordinate with central shaft 3；Between lobe 222 and central shaft 3, plug is provided with sealing ring 8, plays sealing fixation.
As in figure 2 it is shown, the surface contacted with driving chain on gear 4 is sprayed with tungsten carbide wear resistant layer 9.The thermal coefficient of expansion of tungsten carbide is little, there are higher heat conductivity and coefficient of elasticity, it is resistant to high PV value, it it is a kind of good friction pair material, the most industrial it is widely used, the tungsten carbide that this patent relates to is the surface using the method for spraying plating to be plated in gear 4, and spraying plating process belongs to prior art, and therefore not to repeat here.Tungsten carbide wear resistant layer 9 is set and then can reduce the abrasion on gear 4 surface and driving chain, extend the service life of gear 4.
Embodiment two: a kind of automobile vacuum pump, is with the difference of embodiment one: the wear-resisting passivation layer of the plasma treated formation in surface contacted with driving chain on gear 4, thinner compared to tungsten carbide wear resistant layer 9 thickness, abrasion resistant effect is fine.
This specific embodiment is only to explanation of the present utility model; it is not to restriction of the present utility model; the present embodiment can be made after reading this specification by those skilled in the art as required does not has the amendment of creative contribution, but as long as all being protected by Patent Law in right of the present utility model.
Claims (10)
1. an automobile vacuum pump, including the pump housing (1), pump cover (2) and the central shaft (3) running through the pump housing (1), pump cover (2), gear (4) it is arranged with on central shaft (3), it is characterized in that: the both sides being positioned at gear (4) on described central shaft (3) are provided with baffle plate (5), baffle plate (5) is being extended with and the packing ring (6) of gear (4) sidewall laminating on the axis direction of gear (4).
Automobile vacuum pump the most according to claim 1, it is characterised in that: the diameter of described baffle plate (5) is more than the tooth top diameter of a circle of gear (4).
Automobile vacuum pump the most according to claim 1, it is characterised in that: the diameter of described packing ring (6) is less than the tooth root diameter of a circle of gear (4).
Automobile vacuum pump the most according to claim 3, it is characterised in that: it is provided with elastomeric pad (7) between described packing ring (6) and central shaft (3).
Automobile vacuum pump the most according to claim 1, it is characterised in that: the thickness of described packing ring (6) is less than the thickness of gear (4).
Automobile vacuum pump the most according to claim 1, it is characterised in that: described pump cover (2) includes that main part (21), main part (21) are provided with the auxiliary section (22) being halved together with main part (21).
Automobile vacuum pump the most according to claim 6, it is characterised in that: it is arranged with sealing ring (8) between described auxiliary section (22) and central shaft (3).
Automobile vacuum pump the most according to claim 6, it is characterised in that: described auxiliary section (22) are provided with epitaxy part (221) in the radial direction along central shaft (3).
Automobile vacuum pump the most according to claim 8, it is characterized in that: the quantity of described epitaxy part (221) at least 3, including annular end (2211) on each epitaxy part (221), the same side end face of annular end (2211) is in same plane.
Automobile vacuum pump the most according to claim 1, it is characterised in that: upper and chain contact the surface of described gear (4) is provided with tungsten carbide wear resistant layer (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295295.4U CN205533239U (en) | 2016-04-09 | 2016-04-09 | Automobile vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295295.4U CN205533239U (en) | 2016-04-09 | 2016-04-09 | Automobile vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205533239U true CN205533239U (en) | 2016-08-31 |
Family
ID=56790988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620295295.4U Expired - Fee Related CN205533239U (en) | 2016-04-09 | 2016-04-09 | Automobile vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205533239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707628A (en) * | 2018-12-17 | 2019-05-03 | 陈鑫 | The aluminium alloy pump body structure of vacuum pump and the honing head processed for the pump housing |
-
2016
- 2016-04-09 CN CN201620295295.4U patent/CN205533239U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707628A (en) * | 2018-12-17 | 2019-05-03 | 陈鑫 | The aluminium alloy pump body structure of vacuum pump and the honing head processed for the pump housing |
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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 |
Granted publication date: 20160831 Termination date: 20190409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |