WO2019044385A1

WO2019044385A1 - Lamp bracket

Info

Publication number: WO2019044385A1
Application number: PCT/JP2018/029262
Authority: WO
Inventors: 山口　直樹
Original assignee: ヤンマー株式会社
Priority date: 2017-08-29
Filing date: 2018-08-03
Publication date: 2019-03-07
Also published as: JP2022113902A; JP2019043155A

Abstract

Provided is a lamp bracket (50) for securing a headlight (30) to the upper part of a distal end of an engine (1), wherein: the lamp bracket (50) is disposed on the upper part of a distal end of an engine body (4) and is provided with a securing part (58) that secures a top cover (40) of the engine (1); an attachment hole (58B) for securing the top cover (40) via an attachment piece (42) formed in a distal end part of the top cover (40) is formed in the securing part (58); and the attachment hole (58B) is formed horizontally along a forward-rearward direction in a state of being attached to the engine body (4), whereby the headlight and a peripheral member can be efficiently attached to the engine body.

Description

Lamp bracket

The present invention relates to a lamp bracket disposed to fix a headlight at the tip of an engine.

Conventionally, in small diesel engines and the like, a fuel tank for storing fuel and a radiator for cooling engine cooling water are disposed adjacent to each other on the upper surface of the engine main body in consideration of downsizing and convenience of the engine. The configuration is known. Specifically, there is known, for example, a horizontal water-cooled engine in which an engine main body including a cylinder head, a cylinder block, and a crankcase is disposed in the lateral direction (see, for example, Patent Document 1). A fuel tank is disposed above the main body, and a radiator for cooling the cooling water is disposed adjacent to the fuel tank. Such small engines are used in various applications because they are compact and easy to use.

The small engine as described above is assumed to be used in various situations, and a headlight may be provided at the front of the engine body to illuminate the front (see, for example, Patent Document 2). .

JP, 2006-083780, A International Publication No. 2013/042558

In the above-described small-sized engine, since a large part such as a fuel tank and a radiator are disposed on the upper part of the engine body, the space in the upper part of the engine body is limited. Therefore, when arranging the lamp bracket for attaching a headlight to an engine main body, to utilize this lamp bracket effectively and to attach other members efficiently is desired.

The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is to attach the headlights and peripheral members to the engine body efficiently in the lamp bracket for fixing the headlights to the upper end of the engine. Provide a lamp bracket that can

In order to solve the above-mentioned main technical problems, according to the present invention, there is provided a lamp bracket provided at a tip upper portion of an engine main body and provided with a fixing portion for fixing a top cover of the engine. A mounting hole for fixing the top cover is formed through a mounting piece formed on the top end of the top cover, and the mounting hole is horizontally formed in the longitudinal direction in the mounting state to the engine main body A lamp bracket is provided.

It is preferable that a protrusion for positioning which defines the arrangement position of the top cover by engaging with the attachment piece of the top cover is erected forward on the fixing portion.

It is preferable that a columnar rib having a space penetrating in the vertical direction is formed on the lamp bracket, and the space is configured as a bolt guide hole through which a fixing bolt for fixing the headlight to the lamp bracket can be inserted from below. .

The lamp bracket may be formed with a lamp guard mounting hole for mounting a lamp guard for protecting the headlight.

According to the present invention, there is provided a lamp bracket provided at a tip upper portion of an engine body and provided with a fixing portion for fixing a top cover of the engine, wherein the fixing portion is formed at the tip portion of the top cover A mounting hole for fixing the top cover is formed through a mounting piece, and the mounting hole is provided with a lamp bracket formed horizontally in the front-rear direction in a mounting state to the engine body. This makes it possible to easily and efficiently attach the top cover that covers the top of the engine body using the lamp bracket for attaching the headlight.

Further, when the top cover is mounted by setting a positioning projection for defining the disposition position of the top cover by engaging with the attachment piece of the top cover on the fixing portion, the protrusion is provided to stand forward. It can be fixed while being easily positioned. Further, a columnar rib having a space penetrating in the vertical direction is formed in the lamp bracket, and the space is configured as a bolt guide hole through which a fixing bolt for fixing the headlight to the lamp bracket can be inserted from below. A structure is realized that facilitates attaching the headlamp to the lamp bracket. Furthermore, the lamp guard can be efficiently disposed at the front of the engine by forming a lamp guard mounting hole for attaching a lamp guard for protecting the headlights in the lamp bracket, and the lamp guard has an obstacle Even if a collision occurs, it is possible to suppress the impact on the other part.

FIG. 1 is an overall perspective view of an embodiment of a horizontal engine configured in accordance with the present invention. It is a disassembled perspective view for demonstrating the attachment state of each component with respect to the lamp bracket of this invention. It is a whole perspective view for demonstrating the detail of the lamp | ramp bracket shown in FIG. FIG. 2 is a perspective view of a state where a fuel tank is assembled to a front portion of the horizontal engine shown in FIG. 1 via a lamp bracket, as viewed obliquely from the right front. It is a perspective view which shows the structure which attaches a top cover and a lamp guard to the front part of the engine main body shown in FIG. It is a partially expanded sectional view which shows the state which assembled the headlight in the front part of a horizontal engine.

Hereinafter, an embodiment of a lamp bracket configured based on the present invention will be described with reference to the attached drawings.

The engine 1 shown in FIG. 1 is a single-cylinder water-cooled horizontal diesel engine (hereinafter referred to as “horizontal engine”). In the description of this horizontal engine, the longitudinal direction of the engine shown by arrow X in FIG. 1 is the front and back direction, the width direction of the engine shown by arrow Y is the left and right direction, and the height direction of the engine shown by arrow Z is the vertical direction. Do. In the present invention, “horizontal” indicates a direction parallel to the installation surface when the horizontal engine 1 is installed with respect to the horizontal surface.

As shown in FIG. 1, the horizontal engine 1 includes an engine main body 4 in which a cylinder head 3 is disposed at the rear of a cylinder block 2. A fuel tank 20 for supplying fuel to the horizontal engine 1 is disposed on the front upper portion of the cylinder block 2. The upper surface of the fuel tank 20 is constituted by a tank cover 21. A radiator (not shown) whose upper surface is covered by a radiator cover 8 is disposed on the upper surface of the cylinder block 2 on the rear side of the fuel tank 20.

Headlights 30 are disposed on the front side of the fuel tank 20, and first protective members (side covers) 7 are disposed on the left and right sides of the fuel tank 20. Further, as shown in the figure, a top cover 40 is disposed between the front end of the tank cover 21 of the fuel tank 20 and the upper end of the headlight 30, which covers a mounting structure on the front side of the fuel tank 20 described later. Ru. Also, below the headlight 30, a lamp guard 35, which will be described in detail, is attached.

The radiator is covered by the above-described radiator cover 8 and left and right second protective members (screens) 9 which are disposed continuously at the rear ends of the left and right side covers 7 and in which mesh vents 13 are formed. ing.

A fuel cap 10 is disposed at the center of the upper surface of a tank cover 21 that constitutes the fuel tank 20. A radiator cap 11 is disposed at a central portion of the radiator cover 8, and a suspension bolt 12 for lifting the horizontal engine 1 at a center of gravity is provided in front of the radiator cap 11.

An air cleaner 15 for supplying intake air to a combustion chamber (not shown) formed in the cylinder head 3 of the horizontal engine 1 and exhaust air discharged from the combustion chamber are discharged to the outside behind the engine body 4 Mufflers 16 are disposed on the left and right.

A crankshaft (not shown) is rotatably disposed inside the cylinder block 2 in a posture along the lateral direction, and a flywheel 19 is attached to the left end of the crankshaft (FIG. 1 and FIG. See Figure 4). The flywheel 19 is rotated at the time of start-up to facilitate engine start-up, and acts to suppress rotational fluctuation of the crankshaft after the horizontal engine 1 is started.

The front support structure of the horizontal engine 1 including the lamp bracket 50 of the present embodiment will be described with reference to FIGS. 2 to 4.

FIG. 2 is an exploded perspective view for explaining the assembly structure of each component to the lamp bracket 50. As shown in FIG. The lamp bracket 50 shown in FIG. 2 will be described in detail with reference to FIGS. The lamp bracket 50 is provided with a substantially horizontally long rectangular annular frame 52 provided with an opening 51 in which a bowl-shaped lamp housing 32 constituting the headlight 30 can be inserted and disposed from the front side. The annular frame 52 is composed of a lower horizontal frame 52A, an upper horizontal frame 52B, and left and

right frames

52C and 52C. On the back side of the lower horizontal frame 52A, a horizontal mounting plate 53 that contacts the corner 2A (see FIG. 6) of the upper end of the front end of the cylinder block 2 described above from the top, and the corner 2A from the front A vertical mounting plate 54 in contact is integrally formed.

On the upper horizontal frame 52B of the annular frame 52, a horizontal placement support surface 52b for placing and holding the front flange 23 of the fuel tank 20 is formed. A tank mounting portion 62 for the front side flange 23 of the fuel tank 20 is formed at each of the left and right direction both end portions and the left and right direction center portion of the upper horizontal frame portion 52B. Each tank mounting portion 62 is thicker than the other portion of the upper horizontal frame portion 52B of the annular frame portion 52, and the flange 23 of the fuel tank 20 is screwed to each tank mounting portion 62. Screw holes 63 for the bolts 69 are formed.

Further, as shown in FIG. 3, a fixing portion 58 for attaching the top cover 40 is formed on the front side of the upper horizontal frame portion 52B. In the fixing portion 58, a projection 58A for aligning the top cover 40 is provided to stand forward. At a position adjacent to the projection 58A, an attachment hole 58B is formed, into which a fixing bolt is screwed when the top cover 40 is fixed to the lamp bracket 50. The mounting hole 58B is drilled from the front side in the front-rear direction, that is, the horizontal direction in a state where the lamp bracket 50 is attached to the engine main body 4, and a screw thread is formed on the inner side.

In both vertical frame portions 52C formed on the left and right of the annular frame portion 52, box-shaped columnar ribs 55 in which bolt guide holes 56 are formed to penetrate vertically are formed. On the upper side surface of the columnar rib 55, a mounting surface 55a on which the tip end portion of the lamp mounting member 34 disposed on the back surface side of the headlight 30 is mounted is formed. At the center in the vertical direction on the front side of the columnar rib 55, there is formed an opening 57 through which the mounting bolt 37 to be inserted into the internal bolt guide hole 56 in a state where the lamp bracket 50 is attached to the engine body 4 can be checked. The attachment structure of the headlight will be described later.

In the horizontal mounting plate 53, a bolt insertion hole is formed in a screw hole (not shown) formed on the upper surface of the above-mentioned corner 2A of the cylinder block 2 to be fastened with a bolt from above in the vertical direction (Not shown). Further, as shown in FIG. 2, in the vertical mounting plate portion 54, a bolt insertion hole 60 is formed in a screw hole formed on the side surface on the front side of the cylinder block 2 to be fastened with a bolt 59 from the front side in the horizontal direction. There is. The bolt insertion hole 60 is formed in a slightly elongated hole shape along the vertical direction.

Further, in each of both corner portions formed by the lower horizontal frame portion 52A and the left and right vertical frame portions 52C of the annular frame portion 52, an arm portion 70 extending outward outward in the left-right direction Is formed. At the upper side of the middle portion of both arms 70, an engagement hole 71 is formed, which is engaged with a positioning pin 33 that functions as positioning when attaching a headlight described later. Further, below the engagement hole 71, an attachment hole 72 for screwing and fixing with a bolt is formed when the lamp guard 35 described later is attached.

The lamp bracket 50 is made of strong and durable aluminum die-cast, and is mounted over two surfaces of the upper surface and the front side surface of the cylinder block 2, so stress concentration on the lamp bracket 50 is reduced and durability is achieved. Contribute to the sex. Moreover, since the corner portion 2A formed by the upper surface and the front side of the cylinder block 2 has high processing accuracy, the mounting accuracy of each component mounted on the lamp bracket 50 to the cylinder block 2 can be secured.

Next, the mounting structure of the front portion of the fuel tank 20 will be described. As shown in FIGS. 2 and 4, the fuel tank 20 includes a sheet metal tank cover 21 forming an upper portion opening downward and a sheet metal tank main body 22 forming a lower portion opening upward. Configured An annular flange integrally projecting outward from the lower opening periphery of the tank cover 21 and a flange integrally projecting outward from the upper opening peripheral edge of the tank body 22 are overlapped. Welded by seam welding. On the outer periphery of the fuel tank 20 integrated by the seam welding, a flange 23 which makes a round in the horizontal direction is formed.

When the front portion of the fuel tank 20 is attached to the engine body 4, first, as shown in FIG. 2, the fuel tank via the vibration isolation rubber 65 on the mounting support surface 52 b of the lamp bracket 50 previously fixed to the cylinder block 2. The flange 23 located at the front of the mounting portion 20 is placed, and a pressure plate 67 is brought into contact with the upper surface of the flange 23 of the fuel tank 20 via the vibration isolation rubber 66. In this state, between the inner surface of bolt insertion hole 68 in flange 23 of fuel tank 20 and the outer surface of bolt 69 and between the upper surface of upper horizontal frame 52B of lamp bracket 50 and the lower surface of pressure plate 67. A cylindrical positioning collar 73 made of metal is fitted and mounted, and a bolt 69 inserted through the bolt insertion hole 67a of the holding plate 67 is penetrated, and the screw hole 63 of the upper horizontal frame 52B of the lamp bracket 50 is inserted. Fix screwed on. In this manner, the fuel tank 20 can be firmly attached to the engine body 4 with little vibration.

Next, the mounting structure of the top cover 40 by the lamp bracket 50 will be described.

As shown in FIGS. 1, 2 and 5, the top cover 40 has a central cover 40A facing the front end 21A of the tank cover 21 of the fuel tank 20 and both inclinations facing the left and right inclined wall 21B of the tank cover 21. It consists of a cover 40B. On both sides in the left-right direction of the lower end edge of the central cover portion 40A, as shown in FIGS. 2 and 5, there are disposed attachment pieces 42 hanging down from a position slightly backward from the lower end edge of the central cover portion 40A. . The mounting piece 42 is formed with a step portion 42b for engaging with the positioning projection 58A disposed on the fixing portion 58 of the lamp bracket 50 described above. The stepped portion 42b is composed of a horizontal portion positioned in the vertical direction by abutting on the upper surface of the projection 58A, and a vertical portion for positioning in the lateral direction by abutting on the vertical side surface of the projection 58A. Ru. Furthermore, an insertion hole 42 a through which the bolt 41 can be inserted is formed in the mounting piece 42. The insertion hole 42a is formed to be slightly larger than the diameter of the bolt 41, and the positioning state due to the engagement of the projection 58A of the lamp bracket 50 and the step 42b of the attachment piece 42 of the top cover 40 is maintained. As it is, it is possible to screw and fix the top cover 40 to the lamp bracket 50 using the bolt 41.

If the top cover 40 is attached to the front of the engine main body 4, the step portion 42 b of the mounting piece 42 is attached to the projection 58 A of the lamp bracket 50 described above with reference to FIGS. Engage from the left side. As a result, accurate positioning of the top cover 40 in the vertical direction and in the lateral direction is performed. With the stepped portion 42b of the mounting piece 42 abutted against the projection 58A of the lamp bracket 50, the bolt 41 is screwed into the mounting hole 58B to fix the top cover 40. Thereafter, the end of the inclined cover 40B of the top cover 40 is screwed and fixed to the stay 25 welded to the flanges 23 on the left and right sides of the fuel tank 20 by a bolt 45.

The mounting hole 58B of the lamp bracket 50 is configured to extend in the horizontal direction in the back and forth direction, and it is possible to horizontally insert the bolt 45 from the front side and fix it in a screwed manner. Further, since the projection 58A engaged for positioning with the step 42b of the attachment piece 42 of the top cover 40 is formed, the step 42b of the attachment piece 42 is brought into contact with the projection 58A. It is possible to attach the top cover 40 while confirming that it has been positioned, and it is possible to secure the attachment accuracy of the top cover 40 at a high level. Therefore, the ridge lines of each surface constituting the surface of the tank cover 21 of the fuel tank 20 can be easily matched with the ridge lines of each surface constituting the surface of the top cover 40, and the appearance is not impaired.

Next, the mounting structure of the lamp guard 35 will be described. The lamp guard 35 is formed by bending a plate member made of a sheet metal, and as shown in FIGS. 1, 2 and 5, a substantially U-shaped main portion 35A having an open portion on the rear side in plan view; It is comprised by the attaching part 35B by which the edge part was bend | folded in order to fix to the lamp bracket 50. As shown in FIG. When the lamp guard 35 is attached to the lamp bracket 50, the attachment portion 35B is formed with an insertion hole 35b through which the bolt 36 is inserted.

When mounting the lamp guard 35, the insertion hole 35b of the mounting portion 35B of the lamp guard 35 is positioned in the mounting hole 72 of the lamp bracket 50, and the bolt 36 is inserted from the front side and screwed and fixed. As shown in FIG. 1, in a state where the lamp guard 35 is attached to the lamp bracket 50, the main body 35A of the lamp guard 35 is positioned below the headlight 30, and the front end of the lamp guard 35 is the lower end of the headlight 30. It is formed to be on the front side of the part. In addition, the shape of the lamp guard 35 can be changed suitably, It is not limited to the shape of this embodiment.

As described above, the lamp bracket 50 is made of a high strength member (made of aluminum die cast) and is directly fixed to the front end corner 2A of the cylinder block 2, and the obstacle approaches the vicinity of the headlight and the lamp Even when contacting the guard 35, it is possible to prevent an impact from being applied to other than the lamp guard 35.

Next, the mounting structure of the headlight 30 will be described based on FIGS. FIG. 6 is a partial cross-sectional view of the position of the columnar rib 55 of the lamp bracket 50 cut back and forth, and the headlight 30 includes the peripheral portion of the lens portion 31 and the peripheral portion of the lamp housing 32 provided with the light source 29. It is constructed by fitting and joining in a watertight state. The lens portion 31 includes a front lens portion 31A that is bent in a substantially V shape that bulges forward in a side view, and a side lens portion 31B that extends rearward and outward from the left and right direction side of the front lens portion 31A. ing. The lamp housing 32 has a bowl-shaped reflection surface configuration 32A for housing the light source 29, and a side cover 32B extending rearward and outward along the both sides lens portion 31B of the lens 31 from both sides in the left-right direction of the reflection surface configuration 32A. It consists of

As shown in FIG. 2, on the rear side of the lamp housing 32 of the headlight 30 and on the lower side in the lateral direction on the lower side, which is biased inward from the fitting edge between the lens portion 31 and the lamp housing 32, There is provided a positioning pin 33 projecting horizontally toward the On the rear surface of the lamp housing 32 and on the upper side in the left and right direction both sides of the fitting portion of the lens portion 31 and the lamp housing 32, the mounting surface 55a of the columnar rib 55 of the lamp bracket 50 is provided. The mounting member 34 placed on the is extended horizontally. At the front end of the mounting member 34, an insertion notch 34a is formed for inserting a fixing bolt 35 described later. A clip nut 34B is attached to the insertion notch 34a at the tip of the both attachment members 34.

When attaching the headlight 30 to the lamp bracket 50, the tips of both positioning pins 33 of the lamp housing 32 described above are formed on both arm portions 70 of the lamp bracket 50 with the positioning pins 33 engaged from the front side It is inserted into and engaged with the positioning engagement hole 71. Further, the positioning pin 33 is engaged with the positioning engagement hole 71, and the clip nut 34B attached to the tip of the mounting member 34 of the lamp housing 32 is mounted on the mounting surface 55a of the columnar rib 55 Pair up.

As shown in FIG. 6, in a state where the headlight 30 is temporarily assembled to the lamp bracket 50, the bolt guide hole 56 is penetrated from below the bolt guide hole 56 formed to penetrate vertically in the columnar rib 55. The fixing bolt 37 reaching the nut portion of the clip nut 34B attached to the tip of the mounting members 34 of the lamp housing 32 is inserted, and the headlight 30 is screwed and fixed to the lamp bracket 50. The operator who attaches the headlights 30 to the lamp bracket 50 first inserts the long fixing bolt 37 from below the bolt guide hole 56 to the clip nut 34 B positioned on the mounting surface 55 a of the columnar rib 55. The fixing bolt 37 can be temporarily fixed by a manual operation. After that, the fixing bolt 37 can be rotated by an impact driver or the like to be firmly screwed and fixed. The fixing of the headlight 30 is performed after the top cover 40 is attached as described above, and therefore, the fixing is screwed and fixed by the fixing bolt 37 from below. Therefore, in the present embodiment, the configuration as described above, that is, the bolt guide hole 56 is formed, the fixing bolt 37 is inserted from the lower side along the bolt guide hole 56, and screwed to the clip nut 34B By configuring the attachment structure, the headlight 30 can be easily fixed. When the fixing bolt 37 is inserted into the bolt guide hole 56 before the headlight 30 is temporarily assembled to the lamp bracket 50, the insertion is made from the opening 57 formed so that the inside of the bolt guide hole 56 can be seen from the front side. The state can be confirmed and the work can be performed efficiently.

The present invention is configured as described above, so that the top cover 40 can be easily attached to the lamp bracket 50 while securing the attachment strength and the attachment accuracy. Further, since the lamp bracket 50 of the present invention is configured to be able to attach not only the top cover 40 but also the fuel tank 20, the lamp guard 35, etc., the space for arranging a small engine, especially components, is limited. It becomes possible to arrange each component efficiently in a horizontal engine.

The present invention is not limited to the embodiments described above, and various modifications can be envisioned as long as they are included in the technical scope of the invention. For example, in the above-described embodiment, the columnar rib 55 is formed as a box-shaped rib, but the present invention is not limited to this, and may be a cylindrical rib.

1: Horizontal engine 2: cylinder block 3: cylinder head 4: engine body 7: side cover 8: radiator cover 9: screen 10: fuel cap 11: radiator cap 12: suspension bolt 15: air cleaner 16: muffler 19: flywheel 20 : Fuel tank 21: Tank cover 23: Flange 30: Head light 35: Lamp guard 37: Mounting bolt 40: Top cover 42: Mounting piece 50: Lamp bracket 52: Ring frame 55: Columnar rib 58: Fixing portion 58A: Projection Part 58B: Mounting hole 56: Bolt guide hole 57: Opening

Claims

A lamp bracket provided at a front upper portion of a front end of an engine body and having a fixing portion for fixing a top cover of the engine,
The fixing portion is formed with a mounting hole for fixing the top cover via a mounting piece formed at a tip end of the top cover, and the mounting hole has a front and back in a mounting state to the engine main body. The lamp bracket, which is formed horizontally in the direction.
The lamp bracket according to claim 1, wherein a positioning projection which defines the disposition position of the top cover by engaging with the attachment piece of the top cover is erected on the fixing portion in a forward direction. .
The lamp bracket is formed with a columnar rib having a space penetrating in the vertical direction, and the space is a bolt guide hole through which a fixing bolt for fixing the headlight to the lamp bracket can be inserted from below. Or the lamp bracket as described in 2.
The lamp bracket according to any one of claims 1 to 3, wherein a lamp guard attachment hole for attaching a lamp guard is formed in the lamp bracket.