JP5975922B2 - Work vehicle cover connecting device - Google Patents

Description

  According to the present invention, there is provided a work vehicle in which a hood covering at least an upper part of a driving part is provided so as to be openable and closable, and a cover body covering a lateral side part of the driving part on the lower side of the bonnet is detachably attached to a traveling machine body. The present invention relates to a cover body connecting device.

  In the cover body connecting apparatus as described above, a connection mechanism that can be engaged and connected to the traveling machine body is provided on each of the rear part, the front side lower part, and the front side upper part of the cover body, and these connection mechanisms. The cover body is attached to the traveling machine body by engaging and connecting, and the cover body is removed from the traveling machine body by releasing the engagement connection of these engagement mechanisms (see, for example, Patent Document 1).

  In the cover body coupling device described in Patent Document 1, each coupling mechanism has, for example, a protrusion and an engagement hole that can be engaged with the protrusion, and the protrusion is engaged with the engagement hole. By engaging, each coupling mechanism is engaged and connected. And in order to lock the connection mechanism with which the front side upper part of the cover body was engaged, the bonnet is provided with the press part which acts on the front side upper part of the cover body. When the bonnet is in the closed state, the connecting mechanism is locked in the engaged state by pressing the upper part of the front side of the cover body downward with the pressing part so that the protruding part does not come off from the engaging hole part. . When the bonnet is in the open state, the action of the pressing force by the pressing portion on the upper front side of the cover body is released, and the protruding portion is released from the engaging hole portion, so that the coupling mechanism is locked to the engaging state. It has been released.

  The pressing part is composed of a rubber block formed in a conical shape with a smaller diameter on the lower side, and its lower end part is a flat pressing surface that presses the upper front side of the cover body, and its upper end part A projecting mounting portion extending upward from the top is integrally provided. For attaching the pressing part, a plate-like mounting member is provided so as to extend in the horizontal direction from the bonnet, and the pressing part is attached to the mounting member by fitting the mounting part into a through hole formed in the mounting member. Yes. The attachment portion is provided with a small-diameter portion having an outer diameter substantially the same as the inner diameter of the through hole and a large-diameter portion having an outer diameter larger than that of the small-diameter portion in order from the lower side. Inserting the attachment part into the through hole and fixing the pressing part to the attachment member by inserting the small diameter part into the through hole while inserting the small diameter part into the through hole while elastically modifying the large diameter part. ing.

JP 2005-231550 A

  In the work vehicle as described above, when the bonnet is opened and closed, some member hits the pressing portion, and the pressing force may act on the pressing portion in the lateral direction of the body or in the longitudinal direction of the body. The pressing portion described in Patent Document 1 has an attachment portion having a small-diameter portion and a large-diameter portion so as to be fitted into and fixed to the through hole of the attachment member, so that the pressing portion is fixed to the attachment member. When the pressing force as described above is applied in this state, the pressing force in the lateral direction of the fuselage or the longitudinal direction of the fuselage is concentrated on the small-diameter portion of the mounting part, and the pressing part moves to support the pressing part. May become unstable, or the pressing portion may deteriorate quickly.

  Therefore, it is desired to attach the pressing portion so as to be strong against the pressing force acting in the lateral direction of the body or in the longitudinal direction of the body, and to improve the durability of the pressing portion.

The feature structure of the cover body connecting device for a work vehicle according to the present invention is such that at least a bonnet that covers the upper part of the driving part is provided so as to be openable and closable. Removably mounted on the aircraft,
The rear portion of the cover body is provided with a rear connection mechanism that can be engaged and connected with the traveling machine body,
The front lower part of the cover body is provided with a front lower connection mechanism that can be engaged and connected with the traveling machine body,
The front upper part of the cover body is provided with a front upper connection mechanism that can be engaged and connected with the traveling machine body,
The front upper coupling mechanism is provided with a projecting portion extending in the vertical direction and an engaging hole portion into which the projecting portion can be engaged, divided into the traveling machine body side and the cover body side,
When the bonnet is in a closed state, a pressing force from the upper side to the lower side is applied to the upper front side of the cover body to lock the front upper coupling mechanism in an engaged state, and the bonnet is opened. In this case, a pressing portion for releasing the pressing force from the upper side to the lower side with respect to the upper front side of the cover body to release the lock to the engaged state of the front upper coupling mechanism is provided,
The pressing portion is fixed to a support member supported by the bonnet and extends downward, and is fitted to the pin member so as to cover the periphery and lower end of the pin member. Provided with a bottomed cylindrical elastic member supported by the bonnet ,
The elastic member is externally fitted to the pin member from the lower side with a space between the bottom portion and the lower end portion of the pin member, and the upper end portion is in contact with the support member. It is in the point where it is installed .

According to this characteristic configuration, since the pressing portion includes the pin member fixed to the support member, the pressing portion can be firmly fixed to the support member. Thus, for example, when the bonnet is opened or closed, even if some member hits the pressing part and a pressing force acts on the pressing part in the lateral direction of the body or in the longitudinal direction of the body, the pressing part moves to It can suppress that support becomes unstable. In addition, since the periphery and lower end of the pin member are covered with an elastic member, when pressing force is applied to the upper front side of the cover at the pressing portion, or when any member hits the pressing portion Also, the impact can be absorbed by the elastic member. Therefore, it is possible to improve the durability of the pressing portion by attaching the pressing portion so as to be strong against the pressing force acting in the lateral direction of the body and the longitudinal direction of the body.
Moreover, according to this characteristic configuration, by providing a gap between the bottom portion of the elastic member and the lower end portion of the pin member, the lower portion of the elastic member is more easily elastically deformed than the lower end portion of the pin member. . Accordingly, when a pressing force is applied to the upper front side of the cover at the bottom of the pressing portion, the elastic member can be positively elastically deformed to appropriately absorb the impact.
In addition, according to this characteristic configuration, when the elastic member is externally attached to the pin member from the lower side, it is only necessary to push in until the upper end portion of the elastic member comes into contact with the support member. Can be achieved. Further, since the upper end portion of the elastic member is in contact with the support member, the elastic member is prevented from moving upward and can be easily held at a desired position.

The feature structure of the cover body connecting device for a work vehicle according to the present invention is such that at least a bonnet that covers the upper part of the driving part is provided so as to be openable and closable. Removably mounted on the aircraft,
The rear portion of the cover body is provided with a rear connection mechanism that can be engaged and connected with the traveling machine body,
The front lower part of the cover body is provided with a front lower connection mechanism that can be engaged and connected with the traveling machine body,
The front upper part of the cover body is provided with a front upper connection mechanism that can be engaged and connected with the traveling machine body,
The front upper coupling mechanism is provided with a projecting portion extending in the vertical direction and an engaging hole portion into which the projecting portion can be engaged, divided into the traveling machine body side and the cover body side,
When the bonnet is in a closed state, a pressing force from the upper side to the lower side is applied to the upper front side of the cover body to lock the front upper coupling mechanism in an engaged state, and the bonnet is opened. In this case, a pressing portion for releasing the pressing force from the upper side to the lower side with respect to the upper front side of the cover body to release the lock to the engaged state of the front upper coupling mechanism is provided,
The pressing portion is attached to the pin member so as to cover a rod-shaped pin member that is fixed to the distal end side of a support member that is supported in a cantilevered state on the bonnet and extends downward, and a periphery and a lower end portion of the pin member. A bottomed cylindrical elastic member that is externally fitted and supported by the pin member, and is provided in the bonnet.
According to this characteristic configuration, since the pressing portion includes the pin member fixed to the support member, the pressing portion can be firmly fixed to the support member. Thereby, for example, when opening and closing the bonnet, even if some member hits the pressing portion and a pressing force acts on the pressing portion in the lateral width direction or the longitudinal direction of the aircraft, the pressing portion moves and the pressing portion It can suppress that support becomes unstable. In addition, since the periphery and lower end of the pin member are covered with an elastic member, when pressing force is applied to the upper front side of the cover at the pressing portion, or when any member hits the pressing portion Also, the impact can be absorbed by the elastic member. Therefore, it is possible to improve the durability of the pressing portion by attaching the pressing portion so as to be strong against the pressing force acting in the lateral direction of the body and the longitudinal direction of the body.
According to a further characteristic configuration of the cover connecting device for a work vehicle according to the present invention, the elastic member is externally fitted to the pin member in a state in which a space is provided between the bottom portion and the lower end portion of the pin member. In the point.

  According to this characteristic configuration, by providing a gap between the bottom portion of the elastic member and the lower end portion of the pin member, the lower portion of the elastic member is more easily elastically deformed than the lower end portion of the pin member. Accordingly, when a pressing force is applied to the upper front side of the cover at the bottom of the pressing portion, the elastic member can be positively elastically deformed to appropriately absorb the impact.

  According to a further characteristic configuration of the cover connecting device for a work vehicle according to the present invention, the elastic member can be externally fitted to the pin member from below, and the upper end of the elastic member abuts on the support member. It is in the point attached to.

  According to this characteristic configuration, when the elastic member is externally attached to the pin member from the lower side, it is only necessary to push in until the upper end portion of the elastic member comes into contact with the support member, thereby simplifying the attaching operation. be able to. Further, since the upper end portion of the elastic member is in contact with the support member, the elastic member is prevented from moving upward and can be easily held at a desired position.

Overall side view of tractor Vertical side view of the prime mover when the bonnet is closed Longitudinal side view of the prime mover with the bonnet open Longitudinal rear view showing the front upper coupling mechanism and the pressing part Exploded perspective view showing the front upper coupling mechanism and the pressing part The figure which shows the press part of a comparative example

An embodiment of a cover connecting device for a work vehicle according to the present invention will be described based on the drawings.
FIG. 1 shows an entire side surface of a tractor as an example of a work vehicle to which a work vehicle cover body connecting device according to the present invention is applied.
This tractor is provided with a prime mover 1 at the front of the fuselage, and a steering part 2 at the middle of the fuselage at the rear of the prime mover 1, and the front frame 3, the clutch housing 4 and the transmission case 5 are integrated. The traveling machine body 6 is configured by being connected. The driving unit 1 is mounted on the front frame 3, and the traveling machine body 6 is supported by a pair of left and right front wheels 7 and rear wheels 8.

  As shown in FIGS. 1 and 2, the prime mover 1 is provided with an engine 9 that employs a diesel engine supported by a vibration isolating material (not shown) on a pair of left and right front frames 3. . A bonnet 11 that forms an engine room 10 that houses the engine 9 is provided. The bonnet 11 includes a closed state (see FIG. 2) in which the engine room 10 is formed and an open state (see FIG. 2). (See FIG. 3). The power from the engine 9 is configured to be transmitted to the front wheels 7 and the rear wheels 8 via a traveling transmission system including a transmission (not shown) for traveling that is built in the transmission case 5 that also serves as a frame, A four-wheel drive tractor is constructed. The steering unit 2 is provided with a steering wheel 12, a driver seat 13, and the like.

  Returning to FIG. 1, at the rear part of the transmission case 5, there is a pair of left and right lift arms 14 that are driven to swing up and down by the operation of a hydraulic lifting cylinder (not shown) housed in the upper part, and engine power. A power take-out shaft 15 and the like that enable taking out to the outside are provided. The power take-off shaft 15 is connected to the engine via a work transmission system including a work transmission system (not shown), a work clutch (not shown), etc., which are separate from the traveling transmission system built in the transmission case 5. The power from 9 is transmitted. The left and right lift arms 14 are connected to a link mechanism (not shown) connected to the rear portion of the transmission case 5 so as to be swingable up and down, and the power take-out shaft 15 is connected to the link mechanism. A transmission shaft or the like for transmitting power to a working device (not shown) such as a rotary tiller is connected.

  As shown in FIGS. 2 and 3, a battery 16, a radiator 17, a cooling fan 18, and an engine 9 are provided in the engine room 10 in order from the front side in the longitudinal direction of the machine body. The bonnet 11 forming the engine room 10 is formed in a box shape covering the upper part of the driving part 1, both side parts of the driving part 1 in the body width direction, and the front part of the driving part 1, and its lower side and rear side are open. Has been. The bonnet 11 includes a first panel 11a, a second panel 11b, and a front grill 11c, and is integrally formed. The 1st panel 11a is comprised so that the upper side of the upper part of the prime mover part 1 and the both sides of the body width direction of the prime mover part 1 continuous on the upper part may be covered. The 2nd panel 11b is comprised so that it may extend below from the front side of the 1st panel 11a, and may cover the both sides of the body width direction of the drive part 1. As shown in FIG. The front grill 11c can be fitted into the opening on the front side of the second panel 11b, and is configured to cover the front part of the driving part 1 and both side parts in the horizontal direction of the machine body that are continuous with the front part. A lower portion of the front grill 11c is provided with a porous portion 20 that communicates the outside with the engine room 10.

  The bonnet 11 is supported so as to be swingable up and down with a swing axis 21 along the lateral width direction of the airframe at the rear end thereof as a fulcrum. The swing axis 21 is supported by a pair of left and right second supports 23 extending forward from a portal-shaped first support 22 provided on the rear side of the bonnet 11. The rear end portion of the bonnet 11 is bent in the downward direction and then bent in the forward direction, and a third support 24 is provided so as to extend forward from the bent portion. A support 24 is connected to the swing axis 21. Incidentally, although not shown in the figure, a lock mechanism that locks the bonnet 11 in a closed state by engaging and connecting the bonnet 11 and the traveling machine body 6 is provided.

  A cover body 19 is provided below the first panel 11 a in the bonnet 11, and the cover body 19 is below the lower end portion of the first panel 11 a on both sides in the body width direction of the prime mover 1. It is comprised so that the side may be covered. The cover bodies 19 are provided on both sides in the lateral direction of the machine body, and the cover bodies 19 on both sides have the same shape and the same configuration. The body 19 will be described as an abbreviation.

  The cover body 19 has a width that covers the engine 9 and its peripheral devices in the longitudinal direction of the body, and a width that covers the space between the lower end portion of the first panel 11a and the upper end portion of the front frame 3 in the bonnet 11 in the vertical direction. Have. The lower end portion of the cover body 19 is formed in an inclined shape such that the front end side portion is positioned below the rear side portion. The cover body 19 is formed in a plate shape in which each of the front end portion, the rear end portion, the upper end portion, and the lower end portion is bent inward in the lateral width direction of the vehicle body. A porous portion 25 that allows air to flow outside is provided.

  The cover body 19 is separated from the bonnet 11 and is configured to be detachable from the traveling machine body 6 independently of the bonnet 11. A rear connection mechanism 26 that can be engaged and connected to the traveling machine body 6 is provided at the rear portion of the cover body 19. A front lower connection mechanism 27 that can be engaged and connected to the traveling machine body 6 is provided at the lower front side of the cover body 19. A front upper connection mechanism 28 that can be engaged and connected to the traveling machine body 6 is provided on the upper front side of the cover body 19. In this manner, the cover body 19 is attached to the traveling machine body 6 by engaging and connecting the rear coupling mechanism 26, the front lower coupling mechanism 27, and the front upper coupling mechanism 28 with the traveling machine body 6. It has become. Further, the cover body 19 is removed from the traveling machine body 6 by releasing the engagement connection with the traveling machine body 6 for each of the rear coupling mechanism 26, the front lower coupling mechanism 27, and the front upper coupling mechanism 28. It has become. Incidentally, since the cover body 19 is provided on both sides in the body width direction, the rear connection mechanism 26, the front lower connection mechanism 27, and the front upper connection mechanism 28 are also provided on both sides in the body width direction. Yes.

  The rear connecting mechanism 26 distributes the first projecting portion 29 extending in the longitudinal direction of the machine body and the first engagement hole 30 to which the first projecting portion 29 can be engaged into the traveling machine body 6 side and the cover body 19 side. I have. In this embodiment, the 1st protrusion part 29 is provided in the 1st support body 22 by the side of the traveling body 6. The first protrusion 29 can be configured to be elastically deformable, for example, by including an elastic member that covers the periphery and the tip of the pin member extending in the longitudinal direction of the machine body. A first engagement hole 30 is provided in a bent portion 19a that is bent inward in the width direction of the airframe on the cover body 19 side. The first engagement hole 30 is provided in each of the upper end side portion and the lower end side portion of the cover body 19, and is formed at two places with a space in the vertical direction. The first protrusions 29 are also provided at two locations with a space in the vertical direction. The cover body 19 is moved rearward so as to approach the first support body 22, and the first engagement hole 30 and the first protrusion 29 are fitted over the first engagement hole 30 and the first engagement hole 30. One protrusion 29 is engaged and connected. In the engaged state, the cover body 19 is moved forward so as to be separated from the first support body 22, and the first engagement hole portion 30 is removed from the first projection portion 29, so that the engagement is achieved. The connection is released.

  The front lower connection mechanism 27 distributes the second projecting portion 31 extending in the vertical direction and the second engaging hole portion 32 in which the second projecting portion 31 is engageable to the traveling machine body 6 side and the cover body 19 side. I have. In this embodiment, the second projecting portion 31 is provided so as to extend downward from a bent portion 19a bent inward in the lateral width direction of the body at a portion corresponding to the front end portion of the cover body 19. The second protrusion 31 can be configured to be elastically deformable, for example, by including an elastic member that covers the periphery and the tip of the pin member extending in the longitudinal direction of the body. The second engagement hole 32 is provided in the fourth support 33 on the traveling machine body 6 side, and the fourth support 33 is provided in a state extending over the pair of left and right front frames 3. A battery 16 and a radiator 17 are supported on the upper part. The second engagement hole portion 32 is provided at a position corresponding to the lateral side portion of the cooling fan 18 in the longitudinal direction of the machine body. The cover 19 is moved downward so as to approach the fourth support 33 and the second protrusion 31 is fitted into the second engagement hole 32 so that the second protrusion 31 and the second engagement are engaged. The joint portion 32 is engaged and connected. In the engaged state, the cover body 19 is moved upward so as to be separated from the fourth support body 33, and the second protrusion 31 is removed from the second engagement hole 32. The connection is released.

  The front upper coupling mechanism 28 includes a third protrusion 34 (corresponding to a protrusion) extending in the vertical direction and a third engagement hole 35 (corresponding to an engagement hole) in which the third protrusion 34 is engageable. ) Are distributed on the traveling machine body 6 side and the cover body 19 side. In this embodiment, the third protrusion 34 is provided so as to extend downward from the fifth support body 36 connected to the cover body 19 at a portion corresponding to the front end of the cover body 19. As shown in FIGS. 4 and 5, the fifth support 36 is formed in a plate shape extending in the longitudinal direction of the machine body, and its lateral end is connected to the inside of the cover body 19 by welding. The rear end portion of the fifth support body 36 is provided with an upright wall portion 36a extending upward, and the upright wall portion 36a is higher in the width direction of the body so that the side closer to the cover body 19 is higher. It is formed in an inclined shape. The 3rd projection part 34 can be comprised by the pin member extended below, for example. The third engagement hole 35 is provided in a sixth support body 37 connected to the engine 9. As shown in FIG. 2, the sixth support body 37 includes a first extending portion 37 a extending upward from the engine 9, and being bent while twisting from the upper end portion of the first extending portion 37 a, and obliquely forward to the body width direction. And a third extending portion 37c extending horizontally from the upper end of the second extending portion 37b to the outside in the lateral direction of the vehicle body. Yes. The third engagement hole 35 is provided in the third extending portion 37 c of the sixth support body 37. By moving the fifth support 36 of the cover body 19 downward so as to approach the sixth support 37 and fitting the third protrusion 34 into the third engagement hole 35, the third protrusion The portion 34 and the third engagement hole 35 are engaged and connected. In the engaged state, the fifth support 36 of the cover body 19 is moved upward so as to be separated from the sixth support 37, and the third protrusion 34 is removed from the third engagement hole 35. Thus, the engagement connection is released.

  The bonnet 11 is provided with a pressing portion 38 that can lock the front upper coupling mechanism 28 in an engaged state. As shown in FIG. 2, when the bonnet 11 is closed, the pressing portion 38 applies a pressing force from the upper side to the lower side with respect to the upper front side of the cover body 19, so that the front upper coupling mechanism 28. Is configured to be locked in an engaged state. Further, as shown in FIG. 3, the pressing portion 38 releases the pressing force from the upper side to the lower side with respect to the upper front side of the cover body 19 when the bonnet 11 is open, and The lock to the engaged state can be released freely.

  The pressing portion 38 moves up and down integrally with the bonnet 11 so that when the bonnet 11 is in a closed state, the pressing portion 38 abuts on the front upper coupling mechanism 28 and can apply a pressing force from the upper side to the lower side. ing. As shown in FIGS. 2 and 3, the front upper coupling mechanism 28 is disposed in the vicinity of the rear side of the coupling portion between the first panel 11 a and the second panel 11 b in the bonnet 11. As a result, the pressing portion 38 is behind the connection portion of the bonnet 11 between the first panel 11a and the second panel 11b so that a pressing force can be applied to the front upper connection mechanism 28 when the bonnet 11 is in the closed state. It is arranged in the vicinity.

  As shown in FIGS. 4 and 5, the pressing portion 38 is fixed to a seventh support 39 (corresponding to a support member) supported by the bonnet 11 and extends downward, and its pin A bottomed cylindrical elastic member 41 that is externally fitted to the pin member 40 so as to cover the periphery and the lower end of the member 40 is provided. The seventh support 39 is configured by bending a plate-like body, and includes a front part 39a extending in the vertical direction, an intermediate part 39b extending rearward from the upper end of the front part 39a, and an intermediate part 39b. And a rear side portion 39c extending obliquely upward from the rear end portion. An intermediate portion 39b of the seventh support 39 is welded and connected to a first bent portion 42 in which the lower end portion of the first panel 11a of the bonnet 11 is bent inward in the width direction of the machine body. The front side portion 39a of the bonnet 11 is connected by welding to a second bent portion 43 in which the rear end portion of the second panel 11b of the bonnet 11 is bent inward in the lateral width direction. Further, on the front side of the connection portion between the front portion 39a of the seventh support 39 and the second panel 11b, a connection portion 44 that welds and connects the first panel 11a and the second panel 11b extends to the front side. It is arranged like this.

  A through hole portion 45 penetrating in the vertical direction is formed in the intermediate portion 39b of the seventh support 39, and the pin member 40 of the pressing portion 38 is provided in a state of penetrating the through hole portion 45 in the vertical direction. ing. The pin member 40 has a disk-shaped upper portion 40a at the upper end portion, and is constituted by a headed pin member having a cylindrical intermediate portion 40b having a smaller diameter than the upper portion 40a, and is penetrated through the through-hole portion 45. In this state, it is fixed to the seventh support 39 by welding.

  As shown in FIG. 4, the elastic member 41 is formed in a bottomed cylindrical shape having a bottom portion 41a and a peripheral wall portion 41b, and a state in which a gap K is separated between the bottom portion 41a and the lower end portion 40c of the pin member 40. The pin member 40 is externally fitted. The elastic member 41 can be externally fitted to the pin member 40 from below, and the upper end portion 41 c of the elastic member 41 is attached so as to contact the lower surface portion of the seventh support 39. Thereby, the intermediate part 40b in the pin member 40 is covered with the elastic member 41 over the entire length in the vertical direction. Although not shown, the bottom 41a of the elastic member 41 is provided with an air vent hole that communicates the inside and the outside.

  As shown in FIGS. 4 and 5, the front upper coupling mechanism 28 overlaps with the fifth support 36 and the sixth support 37 in a state where the fifth support 36 and the sixth support 37 are in contact with each other. The third protrusion 34 and the third engagement hole 35 of the sixth support 37 are engaged and connected. Therefore, when the bonnet 11 is in the open state, the pressing portion 38 is positioned on the upper side of the fifth support 36, and when the bonnet 11 is in the closed state, the pressing portion 38 is placed on the upper surface portion of the fifth support 36. Are in contact with each other to apply a pressing force from the upper side to the lower side. Here, since the gap K is spaced between the bottom 41a of the elastic member 41 and the lower end 40c of the pin member 40, the elastic member 41 is easily elastically deformed, and the upper surface of the fifth support 36 is elastically deformed. It is possible to absorb an impact at the time of coming into contact with the. Further, since the bottom portion 41a of the elastic member 41 is formed in a flat surface shape, a pressing force from the upper side to the lower side can be applied to the fifth support 36 evenly over the entire bottom portion 41a. it can. In addition, in the fifth support 36, the portion with which the bottom 41 a of the elastic member 41 abuts is the portion corresponding to the upper surface of the portion provided with the third protrusion 34, and therefore the third protrusion 34 and the third engagement portion. The state of engagement with the joint hole 35 can be appropriately locked.

[Comparative Example]
Hereinafter, a comparative example of the pressing portion 38 in the present embodiment will be described with reference to FIG.
The entire pressing portion 100 of this comparative example is formed of an elastic member such as a rubber block, and is attached to an eighth support body 101 connected to the bonnet 11. The eighth support body 101 is configured by bending a plate-like body extending in the longitudinal direction of the machine body, and includes a front side portion 101a extending in the vertical direction and a rear side portion extending rearward from the rear end portion of the front side portion 101a. 101b. A through-hole portion 102 penetrating in the vertical direction is formed in the rear side portion 101b, and the pressing portion 100 is fitted and fixed to the through-hole portion 102.

  The pressing part 100 includes a conical first part 100a having a smaller diameter toward the lower side, an attachment part 100b provided on the upper side of the first part 100a, and a second part extending radially outward from the first part 100a. 100c. The lower end portion of the first portion 100a is formed in a flat shape, and the lower end portion of the second portion 100c is also formed in a flat shape. A projecting engagement portion 100d is formed at the extended end of the second portion 100c, and this engagement portion 100d is a notch-like engaged portion formed at the front portion 101a of the eighth support 101. It is configured to be freely engageable with the portion 101c. The attachment portion 100b is provided with a small diameter portion having an outer diameter substantially the same as the inner diameter of the through hole portion 102 and a large diameter portion having an outer diameter larger than that of the small diameter portion in order from the lower side. The pressing part 100 is inserted into the through-hole part 102 from the lower side to the upper side while elastically modifying the large-diameter part of the attachment part 100b, and the small-diameter part of the attachment part 100b is fitted into the through-hole part 102. The attachment portion 100 b is fitted into the through-hole portion 102, and the pressing portion 100 is fitted and fixed to the eighth support body 101.

  Thus, since the engaging part 100d of the pressing part 100 is engaged with the engaged part 101c of the eighth support body 101, even if any member hits the pressing part 100, the pressing part 100 is restricted from moving. can do. Further, even if the pressing part 100 tries to swing around the attachment part 100b as a fulcrum, the upper part of the first part 100a and the second part 100c comes into contact with the lower surface part of the eighth support 101, so that the pressing part 100 does not swing. Movement can also be suppressed.

[Another embodiment]
(1) In the above embodiment, the first protrusion 29 and the first engagement hole 30 in the rear connection mechanism 26, the second protrusion 31 and the second engagement hole 32 in the front lower connection mechanism 27, and the front upper connection About the 3rd projection part 34 and the 3rd engagement hole part 35 in the mechanism 28, it can change suitably whether it distributes to the traveling body 6 side or the cover body 19 side. For example, in the rear coupling mechanism 26, the first protrusion can be provided on the cover body side, and the first engagement hole can be provided on the traveling machine body side.

(2) In the above-described embodiment, the rear coupling mechanism 26 and the front lower coupling mechanism 27 are not limited to those having the protrusions and the engagement holes, but include other engagement parts and engaged parts. It may be.

(3) In the said embodiment, about the shape of the pin member 40 and the elastic member 41, it can change suitably.

(4) In the above embodiment, the bottom 41 a of the elastic member 41 and the lower end 40 c of the pin member 40 are brought into contact with each other without a gap between the bottom 41 a of the elastic member 41 and the lower end 40 c of the pin member 40. Can also be prepared.

(5) In the above embodiment, the elastic member 41 is covered so that the upper end portion 41 c of the elastic member 41 does not contact the seventh support 39 and covers the intermediate portion 39 b in the vertical direction of the intermediate portion 39 b of the pin member 40. It can also be installed.

(6) In the said embodiment, a work vehicle is not restricted to a tractor, For example, a riding mower, a riding rice transplanter, a wheel loader, etc. may be sufficient.

  The present invention is provided with a bonnet that covers at least the upper part of the driving part so as to be freely opened and closed, and a cover body that covers the lateral side part of the driving part on the lower side of the bonnet is detachably attached to the traveling machine body. It can be applied to cover body connecting devices of various work vehicles that can attach a pressing portion so as to be strong against the pressing force acting in the front-rear direction and can improve the durability of the pressing portion.

DESCRIPTION OF SYMBOLS 1 Drive part 11 Bonnet 19 Cover body 26 Rear connection mechanism 27 Front lower connection mechanism 28 Front upper connection mechanism 34 3rd protrusion part (protrusion part)
35 Third engagement hole (engagement hole)
38 pressure part 39 7th support body (support member)
40 Pin member 41 Elastic member

Claims (4)

A bonnet covering at least the upper part of the driving part is provided so as to be freely opened and closed, and a cover body covering the lateral side part of the driving part on the lower side of the bonnet is detachably provided on the traveling machine body,
The rear portion of the cover body is provided with a rear connection mechanism that can be engaged and connected with the traveling machine body,
The front lower part of the cover body is provided with a front lower connection mechanism that can be engaged and connected with the traveling machine body,
The front upper part of the cover body is provided with a front upper connection mechanism that can be engaged and connected with the traveling machine body,
The front upper coupling mechanism is provided with a projecting portion extending in the vertical direction and an engaging hole portion into which the projecting portion can be engaged, divided into the traveling machine body side and the cover body side,
When the bonnet is in a closed state, a pressing force from the upper side to the lower side is applied to the upper front side of the cover body to lock the front upper coupling mechanism in an engaged state, and the bonnet is opened. In this case, a pressing portion for releasing the pressing force from the upper side to the lower side with respect to the upper front side of the cover body to release the lock to the engaged state of the front upper coupling mechanism is provided,
The pressing portion is fixed to a support member supported by the bonnet and extends downward, and is fitted to the pin member so as to cover the periphery and lower end of the pin member. Provided with a bottomed cylindrical elastic member supported by the bonnet ,
The elastic member is externally fitted to the pin member from the lower side with a space between the bottom portion and the lower end portion of the pin member, and the upper end portion is in contact with the support member. Cover body connecting device for work vehicle installed . A bonnet covering at least the upper part of the driving part is provided so as to be freely opened and closed, and a cover body covering the lateral side part of the driving part on the lower side of the bonnet is detachably provided on the traveling machine body,
The rear portion of the cover body is provided with a rear connection mechanism that can be engaged and connected with the traveling machine body,
The front lower part of the cover body is provided with a front lower connection mechanism that can be engaged and connected with the traveling machine body,
The front upper part of the cover body is provided with a front upper connection mechanism that can be engaged and connected with the traveling machine body,
The front upper coupling mechanism is provided with a projecting portion extending in the vertical direction and an engaging hole portion into which the projecting portion can be engaged, divided into the traveling machine body side and the cover body side,
When the bonnet is in a closed state, a pressing force from the upper side to the lower side is applied to the upper front side of the cover body to lock the front upper coupling mechanism in an engaged state, and the bonnet is opened. In this case, a pressing portion for releasing the pressing force from the upper side to the lower side with respect to the upper front side of the cover body to release the lock to the engaged state of the front upper coupling mechanism is provided,
The pressing portion is attached to the pin member so as to cover a rod-shaped pin member that is fixed to the distal end side of a support member that is supported in a cantilevered state on the bonnet and extends downward, and a periphery and a lower end portion of the pin member. A cover body connecting device for a work vehicle provided on the bonnet, comprising a bottomed cylindrical elastic member that is externally fitted and supported by the pin member . The work body cover body connecting device according to claim 2 , wherein the elastic member is externally fitted to the pin member in a state of being spaced from a bottom portion thereof and a lower end portion of the pin member. The elastic member, the pin is fitted attachable from the lower side of the member, the work vehicle of the cover member according to claim 2 or 3 its upper end is mounted so as to contact with the support member Connecting device.

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