CN208138190U - A kind of locking location structure of water pump vane - Google Patents

Abstract

The utility model provides a kind of locking location structure of water pump vane, belongs to pumps design manufacturing technology field.It solves the connection of existing impeller and the technical problems such as is not sufficiently stable.Water pump includes pump shaft and impeller, and water pump includes pump shaft and impeller, offers connecting hole in the middle part of impeller；Locking location structure includes fixed pin and locked spacer, and the end of pump shaft has interconnecting piece, and interconnecting piece includes cylindrical section and conical section, offers threaded hole on the end face of pump shaft；Fixed pin is provided in the axial direction with fixation hole, the hole wall of fixation hole is the conical surface matched with conical section, the outer peripheral surface of fixed pin is the cylindrical surface matched with connecting hole hole wall, also there is the butting section for being resisted against connecting hole end face outside on fixed pin, fixed pin is equipped with the butting section across fixed pin and is screwed onto the screw in threaded hole, and locked spacer is located between the head of screw and the butting section of fixed pin.The reliability that pump shaft is connected with impeller has been effectively ensured in locking location structure in the utility model.

Description

A kind of locking location structure of water pump vane

Technical field

The utility model belongs to water pump structure design field, is related to a kind of fastening structure of water pump components, especially It is a kind of locking location structure of water pump vane.

Background technique

Water pump is the machinery for conveying liquid or being pressurized liquid, and primary structure is to install impeller in the pumping chamber of the pump housing, The rotation of motor impeller, the mechanical energy transmitting of impeller are converted to the kinetic energy of liquid, flow tangent line side along liquid in pumping chamber To water outlet is provided with, liquid is driven by impeller and is expressed to water outlet, then entered in pipeline along water outlet, realize liquid Conveying and pressurization.Therefore impeller is the core component of water pump, is the major influence factors of working efficiency.Currently, the impeller of water pump It is fixedly mounted on pump shaft by nut mostly, although such mounting means is simple, stability is poor, by making for a long time With, it is easy between impeller and pump shaft to loosen, shaking is generated, the working efficiency of entire water pump is caused to reduce, noise increases, and makes water pump The lost of life.In addition this structure forms biggish shearing force to pump shaft when water pump is opened, stops and inverted suddenly, easily makes pump shaft disconnected It splits, easily causes nut and pump shaft there is no moment synchronized under reaction force, impeller is made to loosen, fall off.

Chinese patent (notification number：CN106640744A, publication date：2017-05-10) disclose a kind of water pump vane installation Structure comprising pump shaft, impeller and impeller locking cap；Pump shaft include shaft body and be arranged in shaft body front end for installing leaf The connecting pin of wheel is provided with screw hole along its axis on connecting pin, is provided on connecting pin a plurality of along its axially extending gap, seam Gap penetrates through screw hole and the outer wall of connecting pin, and a plurality of gap is along the radially uniform distribution setting in connecting pin；It is provided with and connects on impeller The compatible fixed ring support in end is connect, is provided with positioning lath compatible with gap on the inner peripheral surface of fixed ring support；Impeller is solid Determine the standing screw that cap includes the matrix in centrum and is arranged on matrix bottom surface, standing screw outer peripheral surface is circular conical surface；Impeller Retainer plate cover for seat on the connecting pin of pump shaft, in the gap, standing screw circular conical surface precession screw hole makes positioning lath Impeller is fixed in connecting pin expansion.

Water pump vane installation in above patent document is still not firm enough, and impeller forms biggish cut with pump shaft when start and stop Shear force is easy to loosen and fall off after long-time use.

Summary of the invention

The utility model aiming at the above problems existing in the prior art, provides a kind of locking positioning knot of water pump vane Structure, technical problem to be solved in the utility model are：How solid and reliable property that water pump vane with pump shaft connect is improved.

The purpose of this utility model can be realized by the following technical scheme：

A kind of locking location structure of water pump vane, water pump include pump shaft and impeller, the company of offering in the middle part of the impeller Connect hole；It is characterized in that, the locking location structure includes fixed pin and locked spacer, the end of the pump shaft has connection Portion, the interconnecting piece include cylindrical section and conical section, offer threaded hole on the end face of the pump shaft；The fixed pin is along axial Fixation hole is offered, the hole wall of the fixation hole is the conical surface matched with the conical section, and the outer peripheral surface of the fixed pin is The cylindrical surface matched with the connecting hole hole wall, also have on the fixed pin be resisted against connecting hole end face outside against Portion, the screw that the fixed pin is equipped with the butting section across fixed pin and is screwed onto the threaded hole, the locked spacer Between the head of the screw and the butting section of the fixed pin.

The principle is as follows：Pump shaft from the connecting hole of one end of connecting hole insertion impeller, match with interporal lacuna is connect by cylindrical section It closes, has step surface on pump shaft, the side of the step surface and impeller leans, and fixed pin is inserted in connection from the other end of connecting hole In hole, the butting section of fixed pin and the other side of impeller lean, and outer peripheral surface and the connecting hole hole wall of fixed pin fit, pump shaft Conical section be inserted into the fixation hole of fixed pin, impeller and pump shaft are that the torque of pump shaft is transmitted by fixed pin in conical section To impeller, fixed pin tightens extruding by screw, so that the conical section of fixed pin and pump shaft is gradated from clearance fit To be interference fitted, and tightening with screw, interference is increasing, has the function that fasten impeller, so that torque is transmitted, Prevent impeller from having skidded phenomenon in the process of running.Traditional pump shaft transfers torque to impeller by flat key, water pump start and stop and prominent So when reversion, flat key forms biggish shearing force to keyway, easily keyway is made to become larger, and even results in flat key fracture.And this structure is not Torque is transmitted by keyway, therefore does not need to process keyway on pump shaft and impeller, processing efficiency is improved, reduces and be processed into This, while torque transmitting is more uniform, it is entirely avoided flat key is broken the reliability for leading to Joint failure.

Fixed pin and impeller are cooperated by cylindrical surface in the technical program, so that impeller is without departing from pump spindle center, it is fixed to have Position effect, prevents eccentric force.

By setting locked spacer in the technical program, screw can be effectively prevent to go out in water pump start and stop and reversion suddenly It now loosens, guarantees the reliability of connection.

In the locking location structure of above-mentioned water pump vane, the butting section is recessed equipped with dismantling towards the side of connecting hole Slot, the disassembly groove are two and are symmetrically distributed in the butting section close to the position of outer edge.It is easily installed and tears open in this way It unloads.

In the locking location structure of above-mentioned water pump vane, at least there are three Elastic Teeths at the edge of the locked spacer Piece.The quantity of elastic gear piece is preferably five.After screw-driving, the side of elastic gear piece and screw head that locked spacer tooth tilts Face paste is closed, to prevent screw loosening.

In the locking location structure of above-mentioned water pump vane, the screw is outer-hexagonal bolts, tool in the middle part of the impeller There is axial intake tunnel, there is the water passage towards surrounding on the impeller, the intake tunnel is connected with water passage Arc-shaped transition among logical and the two.

Compared with prior art, the fixed structure in the utility model has the following advantages that：

1, locking location structure is by the interference fit of fixed pin and pump shaft conical section pump shaft in the utility model Torque passes to impeller, therefore does not need to process keyway on pump shaft and impeller, improves processing efficiency, reduces and be processed into This, while torque transmitting is more uniform, it is entirely avoided flat key is broken the reliability for leading to Joint failure.

2, the locking location structure in the utility model can effectively prevent screw to open in water pump by setting locked spacer Stop and loosened when inverting suddenly, guarantees the reliability of connection.

Detailed description of the invention

Fig. 1 is the schematic cross-sectional view of this locking location structure.

Fig. 2 is the overlooking structure diagram of pump shaft.

Fig. 3 is the schematic cross-sectional view of fixed pin.

Fig. 4 is the overlooking structure diagram of fixed pin.

Fig. 5 is the overlooking structure diagram of locked spacer.

Fig. 6 is the schematic cross-sectional view of locked spacer.

In figure, 1, pump shaft；11, threaded hole；12, interconnecting piece；12a, cylindrical section；12b, conical section；2, impeller；21, it intakes Channel；22, water passage；23, connecting hole；3, fixed pin；31, fixation hole；32, butting section；32a, disassembly groove；4, stop pad Piece；41, elastic gear piece；5, screw.

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 Figures 1 to 6, water pump includes pump shaft 1 and impeller 2, and the middle part of impeller 2 offers connecting hole 23；Anti- pinidine Bit architecture includes fixed pin 3 and locked spacer 4, and the end of pump shaft 1 has an interconnecting piece 12, interconnecting piece 12 include cylindrical section 12a and Conical section 12b offers threaded hole 11 on the end face of pump shaft 1；Fixed pin 3 is provided in the axial direction with fixation hole 31, fixation hole 31 Hole wall is the conical surface matched with conical section 12b, and the outer peripheral surface of fixed pin 3 is the cylindrical surface matched with 23 hole wall of connecting hole, Also there is the butting section 32 for being resisted against 23 end face outside of connecting hole, fixed pin 3 is equipped with supporting across fixed pin 3 on fixed pin 3 Relying part 32 and the screw 5 being screwed onto threaded hole 11, screw 5 are outer-hexagonal bolts 5, have axial water inlet logical in the middle part of impeller 2 Road 21 has the water passage 22 towards surrounding on impeller 2, and intake tunnel 21 is connected with water passage 22 and the two centre is in Arc-shaped transition；Locked spacer 4 is located between the head of screw 5 and the butting section 32 of fixed pin 3；Pump shaft 1 from connecting hole 23 one End is inserted into the connecting hole 23 of impeller 2, cylindrical section 12a and 23 clearance fit of connecting hole, has step surface on pump shaft 1, the step surface It leans with the side of impeller 2, fixed pin 3 is inserted in connecting hole 23 from the other end of connecting hole 23, the butting section of fixed pin 3 32 lean with the other side of impeller 2, and outer peripheral surface and 23 hole wall of connecting hole of fixed pin 3 fit, the conical section 12b of pump shaft 1 It is inserted into the fixation hole 31 of fixed pin 3, impeller 2 and pump shaft 1 are in the torque biography that conical section 12b is by fixed pin 3 pump shaft 1 Impeller 2 is passed, fixed pin 3 tightens extruding by screw 5, so that fixed pin 3 and the conical section 12b of pump shaft 1 match from gap Conjunction gradates to be interference fitted, and tightening with screw 5, and interference is increasing, has the function that fasten impeller 2, from And torque is transmitted, it is also prevented from impeller 2 and has skidded phenomenon in the process of running.

Further, as shown in figure 4, butting section 32 is equipped with disassembly groove 32a towards the side of connecting hole 23, groove is dismantled 32a is two and is symmetrically distributed in butting section 32 close to the position of outer edge.

As shown in Figure 5 and Figure 6, at least there are three elastic gear pieces 41 at the edge of locked spacer 4.Elastic gear piece in the present embodiment 41 quantity is preferably five, and after screw 5 is tightened, the side of elastic gear piece 41 and 5 head of screw that 4 tooth of locked spacer tilts is pasted It closes, to prevent screw 5 from loosening.

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.

Although 1, pump shaft is used more herein；11, threaded hole；12, interconnecting piece；12a, cylindrical section；12b, conical section； 2, impeller；21, intake tunnel；22, water passage；23, connecting hole；3, fixed pin；31, fixation hole；32, butting section；32a, it tears open Unload groove；4, locked spacer；41, elastic gear piece；5, the terms such as screw, but it does not exclude the possibility of using other terms.Make It is used for the purpose of being more convenient to describe and explain the essence of the utility model with these terms；It is construed as any attached The limitation added is all contrary to the spirit of the present invention.

Claims (4)

1. a kind of locking location structure of water pump vane, water pump includes pump shaft (1) and impeller (2), is opened in the middle part of the impeller (2) Equipped with connecting hole (23)；It is characterized in that, the locking location structure includes fixed pin (3) and locked spacer (4), the pump shaft (1) end has interconnecting piece (12), and the interconnecting piece (12) includes cylindrical section (12a) and conical section (12b), the pump shaft (1) threaded hole (11) are offered on end face；The fixed pin (3) is provided in the axial direction with fixation hole (31), the fixation hole (31) hole wall is the conical surface matched with the conical section (12b), and the outer peripheral surface of the fixed pin (3) is and the connecting hole (23) cylindrical surface that hole wall matches also has the butting section for being resisted against connecting hole (23) end face outside on the fixed pin (3) (32), the spiral shell that the fixed pin (3) is equipped with the butting section (32) across fixed pin (3) and is screwed onto the threaded hole (11) It follows closely (5), the locked spacer (4) is located between the head of the screw (5) and the butting section (32) of the fixed pin (3).

2. the locking location structure of water pump vane according to claim 1, which is characterized in that butting section (32) direction The side of connecting hole (23) is equipped with disassembly groove (32a), the disassembly groove (32a) be two and described in being symmetrically distributed in against Portion (32) is close to the position of outer edge.

3. the locking location structure of water pump vane according to claim 1 or 2, which is characterized in that the locked spacer (4) At least there are three elastic gear pieces (41) at edge.

4. the locking location structure of water pump vane according to claim 1 or 2, which is characterized in that the screw (5) is outer Hex screw (5), impeller (2) middle part have axial intake tunnel (21), have on the impeller (2) towards surrounding Water passage (22), the intake tunnel (21) is connected with water passage (22) and arc-shaped transition among the two.