CN209053827U - A kind of auto pump - Google Patents

Abstract

The utility model provides a kind of auto pump, belongs to field of mechanical technique.It solves the problems, such as that existing auto pump installation accuracy is bad.This auto pump includes the pump housing and is arranged at the intracorporal pump shaft of pump and impeller, impeller is fixed on pump shaft end, pump shaft is rotatablely connected by bearing and the pump housing, bearing there are two and respectively first bearing and second bearing, second bearing is between first bearing and impeller, it is cased with bushing outside pump shaft, bushing both ends offset with first bearing inner ring and second bearing inner ring respectively；Pump housing inner wall is equipped with annular mounting groove, the retaining ring that side has opening is also cased with outside pump shaft, first bearing is between second bearing and retaining ring, retaining ring edge is located in mounting groove, wherein an end face is pressed on first bearing outer ring retaining ring, there is the conical surface one on the edge of retaining ring other end, there is the conical surface two, two tight abutment of the conical surface one and the conical surface on mounting groove inner wall.This auto pump has the advantages that installation accuracy is high.

Description

A kind of auto pump

Technical field

The utility model belongs to field of mechanical technique, is related to a kind of water pump, especially a kind of auto pump.

Background technique

In the cylinder body of automobile engine, there is the water channel of a plurality of Cooling Water circulation, with the radiator for being placed in automobile front (being commonly called as water tank) is connected by water pipe, constitutes a big water circulation system, and in the upper water-out mouth of engine, a water is housed Pump, is driven by fan belt, the hot water in engine cylinder body water channel is pumped out, cold water is pumped into.

Existing auto pump is generally by the pump housing, terminal pad (or belt pulley), pump shaft, bearing, water pump vane and water seal The parts such as device are constituted.In actual processing, bearing and the pump housing lead to the presence of assembly between bearing and the pump housing there are machining tolerance Tolerance causes bearing that certain axial float can occur at work, influences the rotation precision and job stability of pump shaft.

Utility model content

The purpose of this utility model is the presence of the above problem in view of the prior art, proposes a kind of auto pump, is solved The technical issues of be how to improve installation accuracy.

The purpose of this utility model can be realized by the following technical scheme: a kind of auto pump, including the pump housing and In the intracorporal pump shaft of pump and impeller, the impeller is fixed on the end of pump shaft for setting, and pump shaft is connected by bearing and pump housing rotation Connect, bearing there are two and respectively first bearing and second bearing, second bearing is between first bearing and impeller, feature It is, is cased with bushing outside the pump shaft, bushing is between first bearing and second bearing, and the both ends of bushing are respectively with the The inner ring of one bearing and the inner ring of second bearing offset；The inner wall of the pump housing is equipped with mounting groove in a ring, and installs Slot and pump shaft are coaxially set, and the retaining ring that side has opening is also cased with outside the pump shaft, and first bearing is located at second bearing Between retaining ring, and the edge of retaining ring is located in mounting groove, and a wherein end face for above-mentioned retaining ring is pressed on the outer of first bearing On circle, there is the conical surface one on the edge of the other end of retaining ring, have on the inner wall of the mounting groove matched with the conical surface one The conical surface two, and the conical surface one is together with two tight abutment of the conical surface.

Under the cooperation of retaining ring and bushing, in the axial direction effectively limitation first bearing, with eliminate first bearing assembling after with The accumulated error of pump housing machining tolerance, the assembly precision of Lai Tigao first bearing and the pump housing, to improve the running accuracy of pump shaft And stability；Secondly, making to generate biggish pretightning force between retaining ring and the pump housing, making to keep off under the cooperation of the conical surface one and the conical surface two Circle is more effectively pressed in first bearing, to further increase the assembly precision of first bearing and the pump housing.

In above-mentioned auto pump, integrally formed with annular shoulder block, second bearing position on the lateral wall of the pump shaft Between bushing and annular shoulder block, and the inner ring of second bearing offsets with annular shoulder block.In being total to for retaining ring, bushing and annular shoulder block With under cooperation, first bearing and second bearing are limited simultaneously in the axial direction, to eliminate first bearing and second bearing assembling simultaneously Afterwards with the accumulated error of pump housing machining tolerance, to further increase the running accuracy and stability of pump shaft.

In above-mentioned auto pump, the gradient of the conical surface one is 10 degree~30 degree.

In above-mentioned auto pump, the gradient of the conical surface one is 15 degree.

It is described integrally formed with limit base annular in shape on the inner sidewall of the pump housing in above-mentioned auto pump Annular shoulder block be in limit base, and the outer ring of second bearing is pressed on limit base.

Compared with prior art, this auto pump has the advantage that

1, retaining ring, annular convex shoulder, bushing and limit base it is common cooperation under, in the axial direction simultaneously limit first bearing and Second bearing, to eliminate accumulated error with pump housing machining tolerance after first bearing and second bearing assembling, Lai Tigao first axle It holds, the assembly precision of second bearing and the pump housing, to improve the running accuracy and stability of pump shaft.

2, under the cooperation of the conical surface one and the conical surface two, make to generate biggish pretightning force between retaining ring and the pump housing, make retaining ring more It is effectively pressed in first bearing, to further increase first bearing, second bearing and the assembly precision of the pump housing.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of this auto pump.

Fig. 2 is the enlarged structure schematic diagram in Fig. 1 at A.

Fig. 3 is the structural schematic diagram of retaining ring.

In figure, 1, the pump housing；1a, mounting groove；1a1, the conical surface two；1b, limit base；2, pump shaft；2a, annular shoulder block；3, impeller； 4, first bearing；5, second bearing；6, bushing；7, retaining ring；7a, opening；7b, the conical surface one.

Specific embodiment

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

As shown in Figure 1, this auto pump includes the pump housing 1 and the pump shaft being arranged in the pump housing 12 and impeller 3.

Wherein, impeller 3 is fixed on the end of pump shaft 2, and pump shaft 2 is rotatablely connected by bearing and the pump housing 1, i.e., at this point, bearing Inner ring and outer ring be connected respectively with pump shaft 2 and the pump housing 1.Bearing there are two and respectively first bearing 4 and second bearing 5, the Two bearings 5 are between first bearing 4 and impeller 3.

As shown in Figure 1 to Figure 3, bushing 6 is cased with outside pump shaft 2, and the internal diameter of bushing 6 is greater than the outer diameter of pump shaft 2.Bushing 6 Between first bearing 4 and second bearing 5, and the both ends of bushing 6 are respectively and in the inner ring of first bearing 4 and second bearing 5 Circle offsets.The inner wall of the pump housing 1 is equipped with mounting groove 1a in a ring, and mounting groove 1a and pump shaft 2 are coaxially set.Outside pump shaft 2 It is also cased with the retaining ring 7 that side has opening 7a, and mounting groove 1a and retaining ring 7 are oppositely arranged.First bearing 4 is located at second bearing 5 Between retaining ring 7, and the edge of retaining ring 7 is located in mounting groove 1a.A wherein end face for retaining ring 7 is pressed on the outer of first bearing 4 On circle, there is one 7b of the conical surface on the edge of the other end of retaining ring 7, have on the inner wall of mounting groove 1a matched with one 7b of the conical surface Two 1a1 of the conical surface, and one 7b of the conical surface is together with two 1a1 tight abutment of the conical surface.In the present embodiment, the gradient of one 7b of the conical surface is 10 ~30 degree of degree, and the gradient of preferably one 7b of the conical surface is 15 degree.

It further illustrates, integrally formed with annular shoulder block 2a on the lateral wall of pump shaft 2, and annular shoulder block 2a and pump shaft 2 are same Axis setting.Second bearing 5 is located between bushing 6 and annular shoulder block 2a, and the inner ring of second bearing 5 offsets with annular shoulder block 2a. Integrally formed with limit base 1b annular in shape on the inner sidewall of the pump housing 1, annular shoulder block 2a is in limit base 1b, and second bearing 5 outer ring is pressed on limit base 1b.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (5)

1. a kind of auto pump, described including the pump housing (1) and the pump shaft (2) and impeller (3) that are arranged in the pump housing (1) Impeller (3) is fixed on the end of pump shaft (2), and pump shaft (2) is rotatablely connected by bearing and the pump housing (1), and there are two bearings and difference For first bearing (4) and second bearing (5), second bearing (5) is located between first bearing (4) and impeller (3), and feature exists In the pump shaft (2) is cased with bushing (6) outside, and bushing (6) is located between first bearing (4) and second bearing (5), and bushing (6) inner ring of the both ends respectively with the inner ring of first bearing (4) and second bearing (5) offsets；On the inner wall of the pump housing (1) Equipped with mounting groove (1a) in a ring, and mounting groove (1a) and pump shaft (2) are coaxially set, and the pump shaft (2) is also cased with outside Side has the retaining ring (7) of opening (7a), and first bearing (4) is located between second bearing (5) and retaining ring (7), and retaining ring (7) Edge is located in mounting groove (1a), and a wherein end face for above-mentioned retaining ring (7) is pressed on the outer ring of first bearing (4), retaining ring (7) there is the conical surface one (7b) on the edge of other end, have and the conical surface one (7b) on the inner wall of the mounting groove (1a) The matched conical surface two (1a1), and the conical surface one (7b) and the conical surface two (1a1) tight abutment are together.

2. auto pump according to claim 1, which is characterized in that be integrally formed on the lateral wall of the pump shaft (2) Have annular shoulder block (2a), second bearing (5) is located between bushing (6) and annular shoulder block (2a), and the inner ring of second bearing (5) with Annular shoulder block (2a) offsets.

3. auto pump according to claim 1 or 2, which is characterized in that the gradient of the conical surface one (7b) is 10 degree ~30 degree.

4. auto pump according to claim 3, which is characterized in that the gradient of the conical surface one (7b) is 15 degree.

5. auto pump according to claim 1 or 2, which is characterized in that on the inner sidewall of the pump housing (1) integrally at Type has limit base annular in shape (1b), and the annular shoulder block (2a) is in limit base (1b), and the outer ring of second bearing (5) It is pressed on limit base (1b).