JP2018069926A - Tractor - Google Patents

Abstract

A tractor in which a rearview mirror hardly vibrates regardless of vehicle body vibration is provided. A support arm 52 extending from a support portion 51 formed on a vehicle body portion 22 toward a lateral side of the vehicle body is provided. The rearview mirror 12 is supported on the extended end of the support arm 52. The support portion 51 is provided with a vibration isolating material that suppresses vibration transmission from the vehicle body portion 22 to the support arm 52. [Selection] Figure 4

Description

  The present invention relates to a tractor equipped with a rearview mirror.

  Conventionally, for example, as shown in Patent Document 1, there has been a tractor equipped with a rearview mirror.

Japanese Utility Model Publication No. 7-5939

  In order to equip the rearview mirror, generally, a support arm that extends from the vehicle body part toward the lateral outer side of the vehicle body is provided, and the rearview mirror is supported by the extended end portion of the support arm. If this happens, it will be difficult to see the image on the rearview mirror.

  The present invention provides a tractor that allows easy viewing of a rearview mirror image regardless of vehicle body vibration.

The tractor according to the present invention is
A support part formed on the body part,
A support arm extending from the support portion toward the lateral side of the vehicle body;
A rearview mirror supported on the extended end of the support arm,
A vibration isolating material that suppresses vibration transmission from the vehicle body portion to the support arm is provided in the support portion.

  According to this configuration, transmission of vehicle body vibration to the support arm is suppressed by the vibration isolating material, and the rearview mirror is less likely to vibrate.

  Therefore, regardless of the vehicle body vibration, the image of the rearview mirror is difficult to vibrate and is easy to see.

  In the present invention, it is preferable that the support portion is located inside the engine bonnet, and the support arm extends outside the engine bonnet through a through hole formed in the engine bonnet.

  According to this configuration, it is possible to prevent rainwater or washing water from entering the support portion or from being exposed to sunlight by the engine bonnet, and it is possible to make the vibration-proof material difficult to deteriorate.

  In the present invention, the engine bonnet includes a horizontal bonnet portion that covers a lateral side of the engine, and an upper bonnet portion that covers the upper side of the engine, and the through hole is formed in the horizontal bonnet portion. Is preferred.

  According to this configuration, since the through hole is located in the horizontal bonnet portion, it is possible to make it difficult for rainwater and washing water to enter the support portion, and it is possible to make the vibration-proof material more difficult to deteriorate.

  In the present invention, it is preferable that the engine bonnet includes a fixed bonnet portion and an opening / closing bonnet portion, and the through hole is formed in the fixed bonnet portion.

  When forming the through hole in the open / close bonnet part, when opening and closing the open / close bonnet part, in order to prevent the open / close bonnet part and the support arm from interfering with each other, the through hole tends to be enlarged. Since the through hole is formed in the fixed bonnet portion, the through hole can be made small.

  In the present invention, it is preferable that the fixed bonnet portion is made of resin, and the opening / closing bonnet portion is made of metal.

  According to this configuration, since the through hole is formed in the resin bonnet portion, it is easier to form compared to the case where it is formed in the metal bonnet portion.

  In the present invention, it is preferable that the vehicle body portion is a support member fixed to the vehicle body frame.

  According to this structure, the support | pillar member which is a vehicle body part can be firmly supported by a vehicle body frame.

  In the present invention, it is preferable that the vehicle body portion is a support member supported by a vehicle body frame via a cushion material.

  According to this configuration, since the cushion material suppresses the vibration of the vehicle body frame from being transmitted to the column member that is the vehicle body portion, the rearview mirror can be made more difficult to vibrate.

  In the present invention, the support portion includes a pair of support members that are fixed to the vehicle body portion and sandwich the base portion of the support arm, and the vibration isolator includes one support member of the pair of support members, It is preferable to be interposed between the base and between the other support member of the pair of support members and the base.

  According to this configuration, it is possible to effectively suppress the vibration of the vehicle body from being transmitted to the support arm by the vibration isolating materials on both sides of the base portion, so that the rearview mirror can be made more difficult to vibrate.

It is a right view which shows the whole tractor. It is a top view which shows a vibration proof connection means. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is a front view which shows the 1st support structure of a rearview mirror. It is a VV cross-sectional arrow view of FIG. It is a front view which shows the 2nd support structure of a rearview mirror. FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6. It is a front view which shows the 3rd support structure of a rearview mirror. It is a perspective view which shows a vibration isolator. It is a perspective view which shows the support structure of an electronic control apparatus.

  Hereinafter, embodiments of a tractor according to the present invention will be described based on the drawings. FIG. 1 is a right side view showing the entire tractor. The direction [F] shown in FIG. 1 is defined as the front side of the vehicle body, the direction [B] is defined as the rear side of the vehicle body, the direction on the front side of the paper is defined as the right side of the vehicle, and the direction on the back side of the paper is defined as the left side of the vehicle.

  The tractor is equipped with a vehicle body equipped with left and right front wheels 2 capable of being driven and steerable and equipped with left and right rear wheels 3 capable of being driven. The vehicle body frame 1 includes an engine 4, a transmission case 5 having a front end connected to the rear part of the engine 4, and a front frame 6 extending from the lower part of the engine 4 toward the front of the vehicle body. The front wheel 2 is supported by the front frame 6. A rear wheel 3 is supported at the rear of the mission case 5. A driving portion 8 having an engine 4 and an engine bonnet 7 is formed at the front portion of the vehicle body. A driving unit 9 is formed on the rear side of the vehicle body. The driving unit 9 includes a driving wheel 10 and a steering wheel 11 for steering the front wheel 2. A rearview mirror 12 is provided on the right side of the vehicle body. A link mechanism 13 and a power take-off shaft 14 are provided at the rear of the vehicle body. The link mechanism 13 is supported by the left and right lower links 13a extended from the rear end portion of the body frame 1 so as to be able to swing up and down, and supported by the rear end portion of the body frame 1 so as to be able to swing up and down. Left and right lift arms 13c for moving the lower link 13a up and down via a rod 13b are provided.

  The tractor is connected to a rotary tiller device (not shown) by a link mechanism 13 so as to be able to move up and down, and is configured to transmit the driving force from the engine 4 from the power take-off shaft 14 to the rotary tiller device. Configure the cultivator. The tractor also constitutes various riding-type work machines by connecting various working devices to the rear part of the vehicle body.

The engine bonnet 7 will be described.
The engine bonnet 7 includes an open / close bonnet portion 7 a that constitutes a front portion of the engine bonnet 7 and a fixed bonnet portion 7 b that constitutes a rear portion of the engine bonnet 7. The open / close bonnet portion 7a is in an open posture by swinging up and down using a pivot shaft 21 in the lateral direction of the vehicle body included in the support portion 20 supported by the vehicle body frame 1 at the lower portion on the front end side. Open the engine room and swing it downward to close it and close the engine room.

  The open / close bonnet portion 7a includes left and right horizontal bonnet portions 16f, an upper bonnet portion 17f, and a front bonnet portion 18. A headlamp 19 is supported on the front bonnet portion 18. The left and right lateral bonnet portions 16f and the upper bonnet portion 17f are made of metal plates. The open / close bonnet portion 7a is made of metal.

  The fixed bonnet portion 7b includes left and right horizontal bonnet portions 16r and an upper bonnet portion 17r. The fixed bonnet portion 7b has a gate shape when viewed in the longitudinal direction of the vehicle body. The left and right lateral bonnet portions 16r and the upper bonnet portion 17r are produced by molding a resin material. The fixed bonnet portion 7b is made of resin. The left and right lateral bonnet portions 16r and the upper bonnet portion 17r are integrally formed.

  The left and right horizontal bonnet portions 16f of the open / close bonnet portion 7a and the left and right horizontal bonnet portions 16r of the fixed bonnet portion 7b constitute the horizontal bonnet portion 16 of the entire engine hood 7. The left and right lateral bonnet portions 16 cover the lateral sides of the engine 4. The upper bonnet part 17r of the entire engine bonnet 7 is constituted by the upper bonnet part 17r of the open / close bonnet part 7a and the upper bonnet part 17r of the fixed bonnet part 7b. The upper bonnet portion 17 covers the upper side of the engine 4.

  As shown in FIG. 1, the fixed bonnet portion 7 b is supported by the support member 22. The column member 22 is supported by the front frame 6 in an attachment posture that protrudes upward from the front frame 6. As shown in FIGS. 1 and 4, the column member 22 includes a pair of left and right column portions 22a extending in the vertical direction of the vehicle body, and a beam portion 22b connected over the upper ends of the left and right column portions 22a and extending in the horizontal direction of the vehicle body. It is a portal shape when viewed from the front and rear of the vehicle body. The lower portions of the left and right column portions 22a are fastened and connected to the front frame 6 by connecting bolts, and the column member 22 is supported by the front frame 6 in a fixed state. The fixed bonnet portion 7 b is fixed to the front frame 6 via a support member 22.

The driving unit 9 will be described.
As shown in FIG. 1, the operation unit 9 includes an upper structure 30 having an operation unit floor 31 and the like, and an operation unit frame 35 that supports the upper structure 30.

  The upper structure 30 includes a driving unit floor 31, a driving panel unit 32, a seat support unit configured to cover the upper side of the transmission case 5 and to support the driving seat 10, and left and right rear wheels. A fender 33 is provided.

  The operation unit frame 35 includes a main frame 36 configured by combining square pipe members and the like, and a support member 37 that stands on the front end of the main frame 36 and supports the operation panel unit 32. The strut member 37 is connected across a pair of left and right column portions 37a rising from the left and right end portions of the main frame 36 along the lateral side portion of the operation panel portion 32, and the upper end portions of the left and right column portions 37a. And a beam portion 37b extending in the vertical direction, and has a portal shape when viewed from the front and rear of the vehicle body.

  As shown in FIG. 1, the driving unit frame 35 is supported by the vehicle body frame 1 via cushioning materials 38 at the left and right end portions on the front end side of the main frame 36 and the left and right end portions on the rear end side of the main frame 36. Has been. Vibration transmission from the vehicle body frame 1 to the driving unit 9 is suppressed by the four cushion members 38.

  As shown in FIGS. 2 and 3, the beam portion 37 b in the column member 37 of the driving unit 9 and the beam unit 22 b in the column member 22 of the driving unit 8 are connected by the vibration isolation connecting means 40 including the vibration isolation member 41. It is. The vibration isolating member 41 suppresses vibration from being transmitted from the prop member 22 of the driving unit 8 to the prop member 37 of the driving unit 9, while the upper end side of the prop member 37 of the driving unit 9 is connected to the prop member 22 of the driving unit 8. I support it.

  As shown in FIGS. 2 and 3, the anti-vibration connecting means 40 includes a driving portion side connecting member 42 fixed to a central portion of the beam portion 37 b of the column member 37 in the lateral direction of the vehicle body, and a beam in the column member 22. And a driving portion side connecting member 43 fixed to a central portion of the portion 22b in the vehicle body lateral direction.

  As shown in FIGS. 2 and 3, the operating portion side connecting member 42 is formed with a cylindrical connecting tube portion 44 that is vertically open at both the upper and lower ends. The driving portion side connecting member 43 is formed in a U-shape that opens forward in the vehicle body in plan view, and is concentric with the base portion 45 extending from the beam portion 22b to the operating portion side and inside the connecting tube portion 44. And a connecting shaft 46 having a cylindrical shape that is positioned in a vertical direction. The connecting shaft 46 is supported by the base portion 45 via a support member 47 connected across the lower end portion of the connecting shaft 46 and the inner wall portion of the base portion 45.

  As shown in FIGS. 2 and 3, the vibration isolation member 41 is made of a cylindrical rubber material. The anti-vibration member 41 is fitted between the connecting cylinder portion 44 and the connecting shaft 46 so as to be fitted inside the connecting cylinder portion 44 and externally fitted to the connecting shaft 46. The vibration isolation member 41 is received and supported from below by the support member 47, so that the vibration isolation member 41 is held so as not to be detached downward from the connection cylinder portion 44 and the connection shaft 46. The vibration isolation member 41 can be detached from the connection cylinder portion 44 and the connection shaft 46 upward by the flange portion 41 a formed at the lower end of the vibration isolation member 41 being supported from above by the connection cylinder portion 44. Not to be held.

  FIG. 10 is a perspective view showing a support structure of the electronic control unit 80 that controls the drive control and the like of the engine 4. In this support structure, an anti-vibration connecting member 82 is interposed between the support portion 81 fixed to the vehicle body portion and the mounting portion 80a provided in the electronic control unit 80. A connecting portion 82 a on the vehicle body side of the connecting member 82 is connected to the support portion 81 via two first vibration isolation rubbers 83. The connecting portion 82 b on the device side of the connecting member 82 is connected to the mounting portion 80 a via two second vibration isolation rubbers 84.

  Among the vibrations in the X, Y, and Z directions generated in the vehicle body, the vibrations in the Y and Z directions due to the unevenness of the road surface are high values. However, the transmission of the vibrations in the Z direction to the electronic control unit 80 is the first. The vibration isolating rubber 83 effectively suppresses the vibration in the Y direction to the electronic control device 80, and the second vibration isolating rubber 84 effectively suppresses the transmission.

A support structure for the rearview mirror 12 will be described.
FIG. 4 is a front view showing the first support structure 50 of the rearview mirror 12. 5 is a cross-sectional view taken along the line VV in FIG. As shown in FIGS. 4 and 5, in the first support structure 50, the right column portion 22 a of the prop member 22 (vehicle body portion) of the prime mover portion 8 is positioned on the upper end side of the column portion 22 a and the engine A support portion 51 is formed at a portion located inside the bonnet 7. A support arm 52 extends from the support portion 51 toward the right lateral outer side of the vehicle body. The support arm 52 extends from the inside of the engine bonnet 7 to the outside through the through hole 53 formed in the horizontal bonnet portion 16 r of the fixed bonnet portion 7 b of the engine bonnet 7. The rearview mirror 12 is supported on the extended end of the support arm 52.

  As shown in FIGS. 4 and 5, the support portion 51 includes a pair of support members 54 fixed to the column portion 22 a, and two vibration isolating materials 55 interposed between the pair of support members 54. ing.

  The pair of support members 54 are arranged at intervals in the longitudinal direction of the vehicle body, and sandwich the base portion 52a of the support arm 52. One vibration isolating material 55 of the two vibration isolating materials 55 is interposed between the front support member 54 and the base 52a. The other anti-vibration member 55 of the two anti-vibration members 55 is interposed between the rear support member 54 and the base 52a. The pair of support members 54 are fastened by connecting bolts 56 that are mounted at two positions above and below the support member 54 and pass through the base portion 52a, and the two vibration isolating materials 55 and the base portion 52a are sandwiched between the pair of support members 54 in the longitudinal direction of the vehicle body. I'm allowed. The two anti-vibration materials 55 are sandwiched in an elastically deformed state.

  The support portion 51 suppresses vibration transmission from the support member 22 to the support arm 52 by the two vibration isolation materials 55 by sandwiching the base portion 52 a of the support arm 52 and the two vibration isolation materials 55 by the pair of support members 54. However, the support arm 52 is supported.

  In the present embodiment, the support member 54 is formed in a flat plate shape, but the vibration-proof material side surface is a flat surface, and the side surface opposite to the vibration-proof member side is a curved surface. Can be adopted. In the present embodiment, the vibration isolator 55 is made of a plate-shaped rubber material, but it is possible to employ a vibration isolator having various shapes and materials such as a block rubber material. In the present embodiment, the base 52a is formed in a flat plate shape, but can be formed of a rectangular or circular bar or tube.

  Although the support arm 52 is supported by the support portion 51 of the column member 22 (vehicle body portion) fixed to the vehicle body frame 1, vibration transmission from the column member 22 to the support arm 52 is suppressed by the vibration isolation material 55. As a result, the rearview mirror 12 can be made difficult to vibrate.

  FIG. 6 is a front view showing the second support structure 60 of the rearview mirror 12. 7 is a cross-sectional view taken along the line VII-VII in FIG. As shown in FIGS. 6 and 7, in the second support structure 60, the support portion 61 is provided with one support member 62 fixed to the column portion 22 a of the column member 22 (vehicle body portion).

  The support part 61 is clamped by the connecting bolt 64 with the clamping member 63 facing the support member 62, and the base 52a of the support arm 52, the vibration isolator 65 interposed between the base 52a and the support member 62, and the base 52a. The vibration isolator 65 interposed between the holding member 63 and the holding member 63 is held in the lateral direction of the vehicle body by the support member 62 and the holding member 63. The two vibration isolating members 65 are sandwiched in an elastically deformed state.

  The support portion 61 clamps the base portion 52a of the support arm 52 and the two vibration isolating materials 65 in the lateral direction of the vehicle body by the support member 62 and the sandwiching member 63, thereby transmitting vibration from the support member 22 to the support arm 52. The support arm 52 is supported while being suppressed by the two vibration isolating materials 65.

  FIG. 8 is a front view showing the third support structure 70 of the rearview mirror 12. As shown in FIG. 8, in the third support structure 70, a support portion 71 is formed on a column portion 37 a in a support member 37 (vehicle body portion) of the operation unit 9. The support part 71 includes a base 52a of the support arm 52, a vibration isolator 74 interposed between the base 52a and the column part 37a, and a vibration isolator 74 interposed between the base part 37a and the support part 52 by tightening the clamping member 72 toward the column part 37a. The vibration isolator 74 interposed between the base 52a and the clamping member 72 is clamped in the lateral direction of the vehicle body by the column portion 37a and the clamping member 72. The two vibration isolating materials 74 are sandwiched in an elastically deformed state.

  The support portion 71 sandwiches the base portion 52a and the two vibration isolating materials 74 by the column portion 37a and the sandwiching member 72 in the lateral direction of the vehicle body, thereby transmitting vibration from the column member 37 to the support arm 52. The support arm 52 is supported while being restrained by.

  A cylindrical spacer 75 is interposed between the column part 37 a and the clamping member 72. The spacer 75 regulates the interval between the column portion 37a and the clamping member 72 so that the vibration isolator 74 is not excessively elastically deformed. As shown in FIG. 9, an annular protrusion 74 a located concentrically with the bolt hole is formed on the side surface of one of the two vibration isolation materials 74. The anti-vibration material 74 forming the protrusion 74 a is assembled in a state where the protrusion 74 a is fitted on the spacer 75 and faces the other anti-vibration material 74. The other vibration isolator 74 is formed in a flat plate shape having no protrusions.

  Since the support arm 52 is supported by the support portion 71 of the support member 37 (vehicle body portion) supported by the vehicle body frame 1 via the cushion material 38, vibration transmission from the vehicle body frame 1 to the support portion 71 is transmitted to the cushion material 38. By suppressing the vibration transmission from the column member 37 to the support arm 52 by the vibration isolating material 74, the rearview mirror 12 can be made difficult to vibrate.

[Another embodiment]
(1) In the above-described embodiment, an example in which the two vibration isolating materials 55, 65, and 74 are provided has been described. However, one or three or more vibration isolating materials may be provided.

(2) In the first support structure 50 and the second support structure 60 described above, an example in which the through-hole 53 through which the support arm 52 passes is formed in the fixed bonnet part 7b and in the horizontal bonnet part 16b of the engine bonnet 7 However, it may be formed on the open / close bonnet portion 7 a or on the upper bonnet portion 17.

(3) In the above-described embodiment, an example in which the rearview mirror 12 is provided only on the right lateral side of the vehicle body is shown, but only on the left lateral side of the vehicle body, or on the right lateral side and the left lateral side. It may be deployed in both.

  The present invention can be used for a tractor including a mini crawler traveling device instead of the rear wheel.

DESCRIPTION OF SYMBOLS 1 Body frame 4 Engine 7 Engine bonnet 7a Opening and closing bonnet part 7b Fixed bonnet part 12 Rearview mirror 16 Horizontal bonnet part 17 Upper bonnet part 22 Car body part (post member)
37 Car body parts (post members)
51 Support Unit 52 Support Arm 52a Base 53 Through Hole 54 Support Member 55 Vibration Isolator 61 Support Portion 65 Vibration Isolator 71 Support Portion 74 Vibration Isolator

Claims (8)

A support part formed on the body part,
A support arm extending from the support portion toward the lateral side of the vehicle body;
A rearview mirror supported on the extended end of the support arm,
The tractor which is equipped with the vibration proof material which suppresses the vibration transmission from the said vehicle body part to the said support arm in the said support part. The support portion is located inside the engine bonnet,
The tractor according to claim 1, wherein the support arm extends to the outside of the engine bonnet through a through hole formed in the engine bonnet. The engine bonnet includes a lateral bonnet portion that covers a lateral side of the engine, and an upper bonnet portion that covers the upper side of the engine.
The tractor according to claim 2, wherein the through hole is formed in the lateral bonnet portion. The engine bonnet includes a fixed bonnet part and an opening / closing bonnet part,
The tractor according to claim 2 or 3, wherein the through hole is formed in the fixed bonnet portion.   The tractor according to claim 4, wherein the fixed bonnet portion is made of resin, and the opening / closing bonnet portion is made of metal.   The tractor according to any one of claims 1 to 5, wherein the vehicle body portion is a support member fixed to a vehicle body frame.   The tractor according to any one of claims 1 to 5, wherein the vehicle body portion is a support member supported by a vehicle body frame via a cushion material. The support portion includes a pair of support members fixed to the vehicle body portion and sandwiching a base portion of the support arm,
The vibration isolator is interposed between one support member of the pair of support members and the base, and between the other support member of the pair of support members and the base. The tractor according to any one of claims 1 to 7.

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