JPH04106068U - Automotive wash pump - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to provide sufficient waterproofness to the vent hole regardless of the mounting position, location, etc. on the vehicle, and to provide freedom in the position of the vent hole. An object of the present invention is to provide a washer pump for an automobile that is large in size and easy to assemble. [Structure] A motor casing 10 includes a bottomed cylindrical body 11 that houses a rotor 2, and a vent hole 11d is formed in this cylindrical body 11. Also, a partition wall portion 18 is provided at the bottom of the cylindrical body 11.
This partition wall portion 18 surrounds and communicates with the ventilation hole 11d, and has an open surface 18a on the radially outer side.
A cover member arranging portion 14 is formed. The partition wall portion 18 is then covered by the cover member 15. The cover member 15 has an external ventilation hole 15h, covers the open surface 18 of the partition wall 18 with a gap, and has a partition protrusion 15f formed on the lower side of the partition wall 18 to surround the external ventilation hole 15h.
A plurality of passages are formed in a three-dimensional maze shape between the ventilation hole 11d formed in the cylindrical body 11 constituting the motor casing 10 and the external ventilation hole 15h formed in the cover member 15.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to washer pumps for automobiles, and in particular to washer pumps for automobiles. An automotive washerpon with a waterproof structure for the ventilation holes in the motor casing. Regarding the

0002

[Conventional technology]

Traditionally, washers have been used to clean the windows or headlights of automobiles, etc. The washer fluid is pumped from the washer fluid storage tank to the washer nozzle. It is used to spray out water from the engine to clean windows, headlamps, etc. For example, a washer pump as shown in FIG. 10 has been proposed. That is, Figure 1 The proposed technology indicated by 0 has a motor casing 105 and a pump casing 108. The washer pump 100 consists of a motor casing 105 including an armature. A motor section 104 is provided with a brush 103 in pressure contact with a commutator 102 of 101. In the pump casing 108, the armature 101 allows the pump chamber 106 to A rotating impeller 107 is housed, and the motor casing 105 and pump casing are connected to each other. A ventilation hole 109 is provided between the housing 108 and the housing 108 . This ventilation hole 109 is the outer peripheral edge 111 of the pump wall 110 on the motor casing 105 side and the motor casing. between the lower end side edge 112 of the cylindrical portion 105a of the ring 105 in the longitudinal direction of the cylindrical portion 105a. along the motor casing 105 and toward the pump casing 108 . The inside and outside of the motor casing 105 are communicated in a labyrinthine manner, and water droplets are directly inside the motor casing 105. The inside and outside of the motor casing 105 are in communication with each other without any intrusion. It has become. By configuring it in this way, the Prevent mechanical trouble by preventing water droplets from entering the inside of the motor casing. The pressure between the inside and the outside is maintained evenly.

0003

[Problem that the idea aims to solve]

In the above conventional technology, the ventilation hole 109 is formed in the longitudinal direction of the cylindrical portion 105a. The ventilation hole 109 is horizontally connected to the outer peripheral edge 111 of the pump wall 110 on the motor casing 105 side. Since the opening is in the direction (left and right in Figure 10), in order to achieve a sufficient waterproof effect, , as shown in FIG. The position of the device when attached to a vehicle must be limited. The problem was that there was no. In addition, especially in the case of washer pumps used in headlamps, they are installed in automobiles. Depending on the location, water may be heavy due to high-speed car washes, rolling up tires, etc. There was a problem that sufficient waterproofness could not be ensured. As typified by the above-mentioned conventional technology, the washer pump ventilation hole is connected to the motor casing. Since the vent hole is formed between the pump casing and the pump casing, there is flexibility in the location of the vent hole. There is no washer pump that can be worn regardless of the mounting state. It was wanted.

0004 The purpose of this invention is to ensure ventilation, regardless of the mounting position, location, etc., on the vehicle. The hole has sufficient waterproofness, and there is a large degree of freedom in the position of the ventilation hole, making it easy to assemble. Our objective is to provide car washer pumps.

[0005]

[Means to solve the problem]

The automotive washer pump according to the present invention has a motor casing that houses a rotor. and an impeller that is connected to the shaft of the rotor and rotates in the pump chamber. the pump casing and the bottom of the pump casing side of the motor casing. A washer pump comprising a vent hole formed in the motor casing. The pump includes a bottomed cylindrical body that accommodates the rotor, an engagement member with the pump casing, and a front A communication portion that communicates between the cylindrical body and the engaging member, and a radially outer side surrounding the ventilation hole and an open surface. and a cover member arranging portion formed on the partition wall and the engaging member. , a cover member is engaged with the cover member placement portion, the cover member is provided with an external ventilation hole and covers the open surface of the partition wall with a gap, and the lower side of the partition wall. A partition protrusion is formed to surround the external ventilation hole.

[0006] In addition, if an opening is formed on the partition side of the communication section, the lower part of the partition It is preferable to form a waterproof wall surrounding the opening of the communication portion.

[0007]

[Effect]

In the present invention, the motor casing includes a bottomed cylindrical body housing the rotor and the pump. an engagement member with the casing, a communication portion that communicates the cylindrical body with the engagement member, and a communication portion that communicates with the engagement member; A partition wall surrounding the pores and having an open surface on the radially outer side, and a partition wall formed on the partition wall and the engaging member. and a cover member arranging portion, the cover member being engaged with the cover member arranging portion. The cover member is provided with an external ventilation hole, and the open surface of the partition wall is provided with a gap. and a partition protrusion surrounding the external ventilation hole is formed on the lower side of the partition wall. Therefore, the ventilation hole formed in the cylindrical body that makes up the motor casing and the cover part Multiple passages are formed in a three-dimensional labyrinth shape between the external ventilation holes formed in the material. As a result, water may enter from the external ventilation hole regardless of how the washer pump is installed. This prevents the air from reaching the ventilation hole formed in the cylindrical body of the motor casing. mechanically to prevent water droplets from directly entering the inside of the motor casing. This prevents problems and maintains even pressure between the inside and outside of the motor casing. In this way, regardless of the mounting position, location, etc. on the car, there is enough space for the ventilation holes. It has waterproof properties. There are also ventilation holes formed in the cylindrical body that makes up the motor casing. A plurality of three-dimensional maze-like passages are formed between the , is configured separately from the pump casing, and the cover member is attached to the cover member installation part. Since the structure allows easy engagement, the position of the ventilation hole in the motor casing can be easily adjusted. The degree of flexibility can be increased, and assembly is easy.

[0008] Also, a waterproof wall that surrounds the opening that is provided in the communication section at the bottom of the bulkhead and exposes the shaft. If there is a leak from the pump chamber in the penetration part that makes up the communication part, water will be removed. Suitable for washer pumps that have an opening for releasing water to the outside. Can be used.

[0009]

【Example】 Hereinafter, one embodiment of the present invention will be described based on the drawings. In addition, the parts explained below The materials, arrangement, etc. do not limit the invention, and may be modified in various ways within the spirit of the invention. It is something that can be done.

0010 As shown in FIG. 1, the automotive washer pump according to this example includes a motor part M, The pump part P is the main component, and the pump part P is operated by this motor part M. drive the washer fluid from the washer tank (not shown) to the washer nozzle. It is something that gushes out. The motor part M is connected to the rotor 2 in the motor casing 10. The pump part P houses the pump case, stator 3, commutator and brushes (not shown), etc. A pump 30 is connected to the shaft 4 of the rotor 2 and rotates within the pump chamber 31. The impeller 32 is housed therein.

[0011] As shown in FIGS. 2 to 4, the motor casing 10 of this example has an opening 11 at the top. The bottomed cylindrical body part 11, the plate part 12, and the bottomed cylindrical body part 11 and the plate part, which have become a. 12 and a cover formed between the bottomed cylindrical body part 11 and the plate part 12. It is composed of a bar member arrangement portion 14 and a cover member 15.

0012 At the top of the bottomed cylindrical body 11, a connector part 17 is arranged together with the lid 16. At the center of the bottom surface 11b of the cylindrical body 11, there is a bearing installation part 13a that constitutes the communication part 13. It is formed. In addition, a ventilation hole 11d is provided on the bottom surface 11b of the inner wall 11c of the cylindrical body 11. (two in this example) are formed with some distance between them. This ventilation hole 11d A partition wall portion 18 is formed in the lower part to cover the ventilation hole 11d. Partition wall portion 18 of this example As shown in FIG. 2 and FIG. 18c and the communication part 13 are formed into a hollow box shape, and the outer circumferential side is the open surface 18a. are doing. The partition wall portion 18 and the ventilation hole 11d are in communication with each other. Also apart On the outside of both side surfaces 18b, 18b of the wall portion 18, there are locking locks projecting outward from the partition wall portion 18. A protrusion 21 is formed. As shown in FIG. The portion 21a is an approximately right-angled extended surface, and slopes are formed from both sides of the partition wall 18 to this extended surface. A portion 21b is formed.

[0013] The plate portion 12 constitutes a connecting portion that is connected to a pump casing 30, which will be described later. A connecting protrusion 12a is provided around the outer periphery, and a communicating protrusion 12a is provided in the center. A recess 13b constituting the portion 13 is formed, and this recess 13b has a shape as shown in FIG. A sealing material 36 is provided, and a central protrusion of the pump casing 30, which will be described later, engage. The bottomed cylindrical body 11 and the plate portion 12 are connected by a connecting portion 19. The plate portion 12 and the cylindrical body 11 are strongly reinforced to prevent them from being damaged. Ma A lock formed on the partition wall portion 18 on the upper surface of the plate portion 12, that is, on the cylindrical body 11 side. At the position aligned with the projection 21, as shown in FIG. 6, two guide parts 22, 22 are provided. Locking protrusions 23 are formed on the outside of these guide portions 22 . This locking protrusion 2 3 also has a locking portion 23a having a substantially right-angled extension surface, similar to the locking protrusion 21, and this extension surface. In contrast, slope portions 23b are formed from both sides of the guide portion 22.

[0014] As shown in FIGS. 1, 3 and 4, the communication section 13 of this example is connected to a bearing arrangement section 13a, It is formed from a recessed part 13b and a through part 13c. The bearing arrangement portion 13a is The bearing 5 of the foot 4 is disposed, and the bearing disposed portion 13a and the penetrating portion 13c are connected. The penetrating portion 13c is an axial hole in the axial direction, and the plate portion 1 It communicates with the recess 13b of No. 2. The cover member arrangement portion 14 of this example is an outer peripheral portion of the communication portion 13 and is located at the outer peripheral portion of the partition wall portion 1. 8, and a cover member 15 is attached to this cover member arranging portion 14. Ru.

[0015] The cover member 15 of this example has a generally U-shaped top view, as shown in FIGS. 2, 7, and 8. The left and right surfaces 15a, 15a, the upper and lower surfaces 15b, and the front surface 15c have Seal surfaces are formed respectively, and partition wall portions are provided at both free ends of the left and right surfaces 15a, 15a. 18 and a locking projection 2 formed on the outside of the guide portion 22. Engaging portions 15e, 15e are formed which are hook-shaped recesses that engage with 3. Also The bar member 15 has a partition protrusion 15f and a notch 15g that comes into contact with the connecting portion 19. , and an external ventilation hole 15h. That is, the width X of the cover member 15 is It is formed slightly larger than the width Y of the wall portion 18, and the motor casing is placed in the center when installed. 11, a partition projection 15f extending toward the center is formed. Partition protrusion 15f is divided at the center, and extends from the lower surface of the partition wall 18 to the inner side of the guide section 22. It is formed into an L-shaped cross section, and the passage is formed by the connecting part 19, the guide part 22, and the plate part 12. is forming. The cutout portion 15g is formed between the divided partition projections 15f. An external ventilation hole 15h is formed in the lower part of this partition projection 15f. Na The reference numeral 15d is a guide that engages with the connecting portion 19.

[0016] The pump casing 30 of this example includes a pump chamber 31 and the pump chamber 31 as described above. It houses an impeller 32 that is connected to the shaft 4 of the rotor 2 and rotated. As shown in FIG. 1, the impeller 32 in the pump casing 30 is A central protrusion is formed in the upper center, and the shaft 4 is attached to this central protrusion. An engagement hole 32a that engages with the tip is formed. These shafts 4 and engagement holes The portions 32a are connected so that the impeller 32 rotates. Note that in this example , an inlet section 33 and an outlet section 34 are integrally formed with the pump casing 30. has been completed.

[0017] To attach the cover member 15 to the motor casing 10 having the above configuration, the following steps are required: Do it like this. That is, as shown in FIG. When the bar member 15 is pushed in from the partition protrusion 15f side, the engaging portion 1 of the cover member 15 5e, 15e, the locking protrusion 21 formed on the partition wall part 18, and the outside of the guide part 22. The locking protrusions 23 formed in the respective locking projections 23 are engaged with each other. At this time, the cover member 15 The notch portion 15g and the connecting portion 19 formed in the partition wall portion 18 come into contact with each other, and the cover member 1 5 is prevented from being pushed in excessively. Then, at this time, snap fit, It is easy to see that it has been set.

[0018] By attaching the cover member 15, the open surface 18a of the partition wall portion 18 becomes It is covered by the top surface 15b and front surface 15c of the cover member 15 with a slight gap. Therefore, the external ventilation hole 15h formed in the cover member 15 is The partition part 15f, the connecting part 19, the guide part 22, and the plate part 12 of the member 15 Therefore, it is covered with a slight gap between it and the communicating part 13. This communication part 1 3 is formed by a passage between the partition portion 15f and the lower surface 18c of the partition wall portion 18. configured to be communicated with.

[0019] As described above, the ventilation hole 11d formed in the cylindrical body 11 of the motor housing 10 The passage is bent by the partition wall part 18 and the cover member 15, and the passage of the partition wall part 18 is bent. The lower surface 18c, the upper surface of the plate portion 12, and the partition between the connecting portion 13 and the cover member 15 It is bent into a gap closer to the communication part 13 between the bent part 15f and the gap closer to the communication part 13. The gap is formed by the cover member 15, the connecting part 13, the guide part 22, and the plate part 12. It will communicate with the ventilation hole 15h, and in this example, the motor housing 10. The ventilation hole 11d communicates with the outside through three passages. Therefore, how Even if the washer pump is installed in a It is waterproof and does not allow water to enter.

[0020] FIG. 9 shows another embodiment of the present invention. 13c is formed with an opening 34 through which the shaft 4 is exposed, and this opening 34 As a result, the sealing material 36 of the shaft 4 became abnormal, and water entered from the pump chamber. Sometimes, water can be easily drained. In this example, the opening 34 is A waterproof wall 35 is attached to the lower part of the partition wall 18 so as to cover it. Such a scene By attaching a waterproof wall 35 to the wall section, it is possible to prevent walls with openings in the communication section. It can also be suitably applied to a washer pump.

[0021]

[Effect of the idea]

According to the present invention, the ventilation hole formed in the cylindrical body constituting the motor casing; A plurality of passages are formed in a three-dimensional maze shape between the external ventilation holes formed in the cover member. regardless of the washer pump installation status, Prevents water from entering and reaching the ventilation holes formed in the cylindrical body of the motor casing. mechanically supported to prevent water droplets from directly entering the inside of the motor casing. This prevents damage and maintains even pressure between the inside and outside of the motor casing. In addition, there are ventilation holes formed in the cylindrical body that makes up the motor casing and the cover member. A plurality of three-dimensional maze-like passages are formed between the pump casing and the external vents. A structure in which the cover member is configured separately from the cover member, and the cover member is easily engaged with the cover member installation part. Therefore, it is possible to increase the degree of freedom in the position of forming the ventilation hole in the motor casing. It is easy to assemble.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a washer pump according to the present invention.

FIG. 2 is a perspective view of the structure of the washer pump according to the present invention, showing a state before the cover member is assembled to the motor casing.

FIG. 3 is a sectional view of a main part showing a state in which a cover member is assembled to a motor casing of a washer pump according to the present invention.

FIG. 4 is a partially cutaway front view of the motor casing of the washer pump according to the present invention.

FIG. 5 is a sectional view taken along line AA in FIG. 4;

6 is a sectional view taken along line BB in FIG. 4. FIG.

FIG. 7 is a top view of the cover member.

8 is a sectional view taken along line CC in FIG. 7. FIG.

FIG. 9 is a front view similar to FIG. 4 showing another example of the present invention.

FIG. 10 is a partially cutaway front view of a conventional washer pump.

[Explanation of symbols]

2 rotor 4 Shaft 10 Motor casing 11 Bottomed cylindrical body 11d Vent hole 12 Engagement member (plate part) 13 Communication part 14 Cover member arrangement part 15 Cover member 15e Engagement part 15f partition protrusion 15h External ventilation hole 18a Open surface 18 Partition wall part 21 Locking protrusion 22 Guide part 23 Locking protrusion 30 Pump casing 31 Bonp room 32 Impeller 34 Opening 35 Waterproof wall

Claims (2)

[Scope of utility model registration request] [Claim 1] A motor casing that houses a rotor;
In the washer pump, the washer pump includes a pump casing that accommodates an impeller that is connected to the shaft of the rotor and rotates in a pump chamber, and a ventilation hole formed in the bottom surface of the motor casing on the pump casing side. a bottomed cylindrical body that accommodates a rotor, an engagement member with the pump casing, a communication portion that communicates between the cylindrical body and the engagement member, and a partition wall that surrounds the ventilation hole and has an open surface on a radially outer side. and a cover member arranging portion formed on the partition wall portion and the engaging member, the cover member being engaged with the cover member arranging portion, the cover member having an external ventilation hole. A washer pump for an automobile, characterized in that a partition protrusion is formed on the lower side of the partition wall to cover the open surface of the partition wall part with a gap, and to surround the external ventilation hole. 2. An opening is formed on the partition wall side of the communication section, and a waterproof wall surrounding the opening of the communication section is formed at a lower part of the partition wall. 1. The automotive washer pump according to 1.