JP2012012858A - Vehicle body structure of skid steering loader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle structure of a skid steering loader with improved rigidity of a set of left/right side-frames vertically disposed on a bottom frame of a main frame without arranging a reinforcing member on an upper portion of a housing chamber formed by the main frame.SOLUTION: A set of left/right side frames 13 vertically disposed on a bottom frame 14 are provided with a thick plate 15 which is inserted between the opposite side-frames 13 at lower ends thereof and serves as a reinforcing member abutting on rear surfaces of the side frames 13. On respective corner portions of the lower end sides of the side frames 13, L-shaped gadgets 17 arranged on the corner portions fix the upper surface of the thick plate 15 to the side surfaces of the respective side frames 13. This allows elimination of a reinforcing member that has conventionally been disposed at an upper portion of an engine room 23.

Description

  The present invention relates to a vehicle body structure of a skid steer loader, and more particularly to a structure at a rear end portion of a main frame of the skid steer loader.

  In general, the bottom frame of the main frame of the skid steer loader is configured to extend in the horizontal direction toward the front end side and the rear end side. Then, the pair of left and right side frames erected from the bottom frame is provided along the left and right side edges of the bottom frame. Further, the base end portions of a pair of left and right work booms provided with a work tool at the distal end portion are supported by a boom support portion so as to be rotatable via horizontal support shafts arranged in the vehicle width direction. . The boom support portions are respectively provided at the left and right side frame portions on the rear end side of the main frame.

  Thus, the base end portion of the work boom is rotatably supported at the left and right side frame portions on the rear end side of the main frame. Since the base end of the work boom is supported by the side frame in this way, the left and right sides of the skid steer loader are traveling and loading work using the work tool provided at the tip of the work boom. When the twisting force acts on the left and right side frames from the work boom, the left and right side frames are twisted. When the side frame is twisted, a twisting force acts on the entire main frame.

  In order to configure a side frame having a strength that can withstand the action of such a twisting force, a conventional skid steer loader includes a reinforcing member that connects a pair of left and right side frames. As a vehicle body structure of a skid steer loader provided with a reinforcing member that connects the left and right side frames, a vehicle body frame of a working vehicle (see, for example, Patent Document 1) or a skid steer loader frame (for example, Patent Document 2). For example).

  The vehicle body frame described in Patent Document 1 is shown as Conventional Example 1 in the present invention, and FIG. 6 is a rear perspective view of the vehicle body frame of Patent Document 1. As shown in FIG. 6, the main frame 41 includes a bottom frame 43, a tip frame 44, and a pair of left and right side walls 42. The left and right side walls 42 are fixed at the lower end side along the side edge of the bottom frame 43 and are connected to each other by a cross member 45. An upright 46 is provided on the rear upper part of the side wall 42 to rotatably support a base end portion of a work boom (not shown) via a horizontal support shaft (not shown).

  A tie bar 47 that connects the left and right side walls 42 is provided on the rear end side of the main frame 41. The tie bar 47 is disposed between a tailgate (not shown) and a bonnet (not shown), and is configured to be detachable from the left and right side walls 42 via fixing bolts. With this configuration, in the invention of Patent Document 1, a heavy work load applied to the upright 46 via a work boom (not shown) can be effectively supported by the tie bar 47 and the cross member 45. I can do it.

The skid steer loader frame described in Patent Document 2 is shown as a conventional example 2 in the present invention. FIG. 7 shows a plan view of the skid steer loader frame of Patent Document 2, and FIG. 8 shows a rear view. . As shown in FIGS. 7 and 8, the skid steer loader frame 51 includes a base member 52, a pair of left and right side members 56, and a front member 57. A housing chamber 58 is formed by the base member 52, a pair of left and right side members 56, and a front member 57.

  The base member 52 has a front end edge 53, a rear edge 54, and left and right side edges 55. In addition, the left and right side members 56 have their lower regions attached along the side edges 55 of the base member 52, and the front member 57 connects the left and right side members 56. The base member 52 is integrally attached to the lower portion of the end edge 53 and the left and right side members 56.

  The skid steer loader frame 51 is provided with detachable reinforcing means 59. The reinforcing means 59 includes a rear plate 60 and a horizontal bar 61. The rear plate 60 provided on the rear end side of the skid steer loader frame 51 has an arrangement configuration that stands upright with respect to the base member 52 as shown in FIG. Then, the left and right side members 56 are connected by the rear plate 60 to reinforce the left and right side members 56. The rear plate 60 is detachably attached to the left and right side members 56.

  A horizontal axis bar 61 provided near the center of the skid steer loader frame 51 is also used to connect the left and right side members 56 together. The left and right side members 56 can be reinforced also by the bar 61 on the horizontal axis. Further, the bar 61 on the horizontal axis is disposed at a position above the housing chamber 58 and is detachably attached to the left and right side members 56.

  In the skid steer loader frame of Patent Document 2 configured as described above, the pair of left and right side members 56 can be reinforced by the reinforcing means 59 that is detachably attached to the skid steer loader frame 51.

JP 2006-322133 A Japanese Patent Laid-Open No. 2002-294751

  In order to provide the side frame with a strength that can withstand the twisting force from the left and right work booms, the cross frame 45 and the tie bar 47 are used in the body frame of Patent Document 1. In the skid steer loader frame of Patent Document 2, a detachable reinforcing means 59 including a rear plate 60 and a horizontal bar 61 is used.

  However, the cross member 45 and the tie bar 47 in Patent Document 1 are arranged above the engine chamber 48 formed by the main frame 41. Further, the bar 61 on the horizontal axis in Patent Document 2 is disposed substantially above the housing chamber 58, and the rear plate 60 is arranged upright with respect to the base member 52.

  For this reason, in the vehicle body frame of Patent Document 1, the cross member 45 and the tie bar 47 disposed above the engine chamber 48 impose restrictions when the upper space of the engine chamber 48 is used. In addition, the height position where the cross member 45 and the tie bar 47 are disposed also affects the rear view from the driver's seat. In particular, since the cross member 45 is configured to have a width in the front-rear direction of the vehicle, the influence on the rear view from the driver's seat is large.

Further, at the time of repair inspection or the like, when the parts attached to the engine room 48 are attached / detached, the cross member 45 and the tie bar 47 are obstructed by the attaching / detaching work. In the vehicle body frame of Patent Document 1, a tie bar 47 is configured to be detachable in order to facilitate work such as repair and inspection in the engine room 48 from the rear side of the vehicle. However, Patent Document 1 does not disclose a configuration in which the cross member 45 can be attached and detached. Although the tie bar 47 is configured to be detachable, the tie bar 47 is attached and detached each time work such as repair and inspection is performed, which is a problem to be solved in terms of work efficiency.

  In the skid steer loader frame of Patent Document 2, the horizontal width of the bar 61 on the horizontal axis in the longitudinal direction of the vehicle is configured to be shorter than the horizontal width of the cross member 45 in Patent Document 1. For this reason, the influence on the rear view from the driver's seat exerted by the bar 61 on the horizontal axis in Patent Document 2 is smaller and improved compared to the invention of Patent Document 1. However, the influence of the horizontal bar 61 on the rear view from the driver's seat still remains.

  Further, the rear plate 60 of Patent Document 2 is configured so as to be upright with respect to the base member 52 on the lower end side of the left and right side members 56. For this reason, the influence of the rear plate 60 on the rear view from the driver's seat is almost negligible.

  Moreover, in the skid steer loader frame of Patent Document 2, the horizontal axis bar 61 and the rear plate 60 are configured to be detachable from the left and right side members 56. Therefore, when repairing and inspecting from the rear side of the vehicle, The horizontal bar 61 and the rear plate 60 can be removed from the left and right side members 56. Then, the work space above the housing chamber 58 can be opened. However, in order to open the working space above the housing chamber 58, the work of removing the horizontal bar 61 and the rear plate 60 from the left and right side members 56 must be performed.

  In the present invention, these problems are solved, and the rigidity of the pair of left and right side frames standing from the bottom frame of the main frame is increased without disposing a reinforcing member above the housing chamber formed by the main frame. It is an object of the present invention to provide an enhanced vehicle body structure in a skid steer loader.

The object of the present invention can be achieved by each invention described below.
That is, in the vehicle body structure of the skid steer loader according to the present invention, the bottom frame in the main frame having the front end portion, the rear end portion, and the left and right side edge portions, and the bottom frame along the side edge portions are erected from the bottom frame. A boom that rotatably supports a pair of left and right side frames in the main frame and a base end portion of a pair of left and right work booms provided with a work tool at a distal end portion thereof via horizontal support shafts arranged in the vehicle width direction. A skid steer loader vehicle body structure, wherein the boom support portion is provided at each of the pair of side frames on the rear end side of the main frame,
A reinforcing member that is arranged in parallel to the bottom frame and that connects and fixes the lower ends of the pair of side frames on the rear end side of the main frame; and the pair of side frames on the rear end side of the main frame The most main feature is that an L-shaped gusset for connecting and fixing the reinforcing member and the side frame is provided at the corner portion on the lower end side of the.

The main feature of the present invention is that the reinforcing member is a thick sheet metal connected and fixed to a rear end portion of the bottom frame and a lower end portion of the pair of side frames.
Further, the main feature of the present invention is that the rear end portion of the reinforcing member travels to the rear side of the vehicle with respect to the rear end of the rear cover of the skid steer loader.
The main feature of the present invention is that the left and right side end portions on the rear end side of the reinforcing member embrace the rear end portion of the rear cover in the left-right direction of the vehicle.

  In the present invention, the lower end portions of the pair of side frames are connected and fixed by the reinforcing member. In addition, since the reinforcing members are arranged in parallel to the bottom frame, L-shaped gussets can be used at the corners on the lower end side of the pair of side frames. The reinforcing effect by can also be used effectively.

  As described above, since the lower end portions of the pair of side frames can be firmly connected and fixed by the reinforcing member and the L-shaped gusset, the rigidity of the pair of side frames can be increased. In addition, the pair of side frames can be provided with a strength that can withstand a torsional force from the pair of left and right work booms.

  In addition, a reinforcing member for reinforcing the pair of side frames need not be disposed above the housing chamber formed by the main frame. Therefore, it is not necessary to remove the reinforcing member at the time of repair and inspection in the housing room, and the work efficiency of repair and inspection can be greatly increased.

  As described above, since the reinforcing member disposed above the housing chamber can be eliminated, the working space above the housing chamber can be opened. Then, it is possible to easily mount and remove the parts installed in the housing chamber, and it is easy to maintain the components in the housing chamber. Further, since the reinforcing member disposed above the housing chamber in the conventional skid steer loader can be eliminated, the rear view from the driver's seat, which has been affected by the reinforcing member, can be expanded.

  In the present invention, the reinforcing member can be made of a thick sheet metal. The thick sheet metal as the reinforcing member can be connected and fixed to the rear end portion of the bottom frame and the lower end portions of the pair of side frames by welding or the like. By using a reinforcing member made of thick sheet metal, the number of parts can be reduced compared to the reinforcing member used in a conventional skid steer loader, and the weight can be reduced compared to the case where a conventional reinforcing member is used. be able to.

  In this way, the weight of the reinforcing member can be reduced, and the pair of side frames can be reinforced without greatly increasing the thickness of the main frame on the rear end side.

  According to the present invention, when the thick sheet metal used as the reinforcing member is disposed on the rear end side of the main frame, the rear edge of the thick sheet metal is stretched to the rear side of the rear side of the rear cover of the skid steer loader. You can leave it on a business trip. By configuring in this way, the bumper function can be provided by the rear end edge of the thick sheet metal made to travel on the rear side of the vehicle from the rear end of the rear cover. The rear cover or the like can be prevented from being damaged by the rear edge of the thick sheet metal functioning as a bumper.

  Further, in the present invention, the rear end portion of the rear cover can be arranged so as to be held in the left-right direction of the vehicle by using the left and right end portions on the rear end portion side of the thick sheet metal used as the reinforcing member. By configuring in this way, damage to the rear cover or the like can be prevented over a wider range by the rear edge of the thick sheet metal functioning as a bumper.

It is the perspective view which looked at the skid steer loader from the front. (Example) It is a principal part perspective view in the rear-end part of a main frame. (Example) It is a top view of a thick sheet metal. (Example) It is a principal part perspective view in the rear part of a skid steer loader. (Example) It is a principal part perspective view when the rear part of a skid steer loader is seen from the downward direction. (Example) It is a back perspective view of a body frame. (Conventional example 1) It is a top view of a skid steer loader frame. (Conventional example 2) It is a rear view of a skid steer loader frame. (Conventional example 2)

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. As the vehicle body structure of the skid steer loader of the present invention, in addition to the configurations described below, those shapes and arrangement configurations can be adopted as long as they can solve the problems of the present invention. Is. For this reason, this invention is not limited to the Example demonstrated below, A various change is possible.

  As shown in FIG. 1, the skid steer loader 1 includes, for example, a loader body 2, a traveling body 3, a driver's seat 4, a lift arm 6, and a boom support portion 5 that rotatably supports the lift arm 6. The working machine cylinder 29 and the like for rotating the arm cylinder 7 and the bucket 9 are provided.

  The loader body 2 constitutes the vehicle body of the skid steer loader 1, and a pair of traveling bodies 3 are provided on the left and right sides of the vehicle body. FIG. 1 shows a configuration in which the traveling body 3 is provided with a pair of left and right front wheels 3A on the front side of the vehicle body and a pair of left and right rear wheels 3B on the rear side. However, although not shown in the drawings, the traveling body may have a pair of crawler belts on the left and right sides of the vehicle body.

  The pair of left and right front wheels 3A are provided so as to be independently rotatable, and the pair of left and right rear wheels 3B are also provided so as to be independently rotatable. When a pair of left and right crawler belts are provided as the traveling body, the left and right crawler belts can be provided so as to be independently rotatable. And by means of an operating lever device (not shown) arranged in the driver's seat 4, the rotation speed and rotation direction of the left and right front wheels 3A and rear wheels 3B can be changed, respectively, or the rotation speed and rotation direction of the left and right crawler tracks can be changed respectively. Can be changed.

  Thus, the posture of the loader body 2 can be controlled by changing the rotational speed and the rotational direction of the left and right traveling bodies 3. That is, it is possible to cause the skid steer loader 1 to travel straight in the forward / backward direction, change direction, spin turn, and the like.

  The driver's seat 4 is positioned in front of the loader body 2 and is mounted on the upper portion of the loader body 2. The driver's seat 4 is covered with a net guard (not shown) on the other three surfaces (the left and right surfaces and the rear surface) other than the front surface. The operator can get in and out of the driver's seat 4 from the front of the driver's seat 4 that is open. The ceiling surface of the driver's seat 4 includes a ceiling portion 4A that is at least partially formed in a lattice shape.

  Note that it is not necessary to cover all three surfaces of the driver's seat 4 except for the front with a net guard, so that a side view and a rear view can be secured and an operator can get on and off the vehicle. Other configurations can be adopted as the configuration of the seat 4. For example, the other three surfaces except the front surface can be configured as windows made of hard glass or the like, and the ceiling can be configured using a steel plate or the like. In addition, an open / close door with a glass window can be provided on the front surface.

An engine (not shown) and the like are stored in an engine cover (not shown) at the rear part of the loader body 2. In addition, a pair of side frames 13 (see FIG. 3) are provided upright on both the left and right sides of the loader body 2. Each side frame 13 at the left and right rear portions of the loader body 2 is provided with a pair of boom support portions 5 that support the base end portions 6a of the pair of lift arms 6. On the upper end side of each boom support portion 5, the base end portion 6a of the lift arm 6 is rotatably supported via a pin or the like.
As shown in FIG. 6, the pair of boom support portions 5 may be provided on an upright disposed at the upper rear portion of each side frame.

  The pair of lift arms 6 are integrally rotated in the vertical direction by the expansion and contraction operations of the respective arm cylinders 7. The base end side of the arm cylinder 7 is rotatably supported by a side frame 13 on the lower side of each boom support portion 5 via a pin or the like, and the tip end side of the arm cylinder 7 constitutes a lift arm 6. The reinforcing plate-like bodies 25A and 25B are supported by a cylinder mounting portion 28 through a pin or the like so as to be rotatable.

  As the arm cylinder 7 extends, the lift arm 6 rises while rotating upward. When the arm cylinder 7 is retracted, the lift arm 6 can be lowered downward and returned to the position shown in FIG.

  The distal end side of the lift arm 6 is bent downward in front of the loader body 2, and a work tool can be detachably attached to the distal end portion of the lift arm 6 bent downward. That is, an attachment coupler or the like (not shown) is provided at the tip of the lift arm 6. Various working tools such as a bucket 9, a fork, and a sweeper can be detachably attached via an attachment coupler or the like. In the illustrated example, a configuration is shown in which a bucket 9 is attached as a work tool. However, the bucket 9 is an example of a work tool, and the present invention is not limited to this.

  FIG. 2 is a perspective view of a main part on the rear end side of the main frame 12 in a state where members such as the engine are also removed. In FIG. 2, a shape in which a part of the boom support portion 5 protrudes to the rear side of the vehicle body from the rear end surface of the side frame 13 is illustrated. However, as shown in FIG. 1, the boom support portion 5 may be configured not to protrude from the rear end surface of the side frame 13 to the rear side of the vehicle body.

  2 shows a configuration example in which a crawler belt is used as the traveling body 3, and therefore a configuration in which a track frame 20 is provided on the side portion of each side frame 13 is illustrated. However, the traveling body 3 without the track frame 20 may be configured to use wheels as shown in FIG.

  As shown in FIG. 2, the main frame 12 includes a bottom frame 14 provided in the longitudinal direction of the vehicle, and a pair of left and right side frames 13 erected from the bottom frame 14 along both side edges of the bottom frame 14. It is the composition provided with. An engine chamber 23 can be formed on the rear side of the main frame 12 surrounded by the bottom frame 14 and the pair of left and right side frames 13.

  As in the lift arm 6 shown in FIG. 1, the base end portions of a pair of left and right work booms provided with work tools at the distal end portions thereof are freely rotatable by boom support portions 5 provided at the upper end portions of the side frames 13. It is supported. That is, the base end portion of each work boom is rotatably supported by the boom support portion 5 via a horizontal support shaft (not shown) arranged in the vehicle width direction.

Further, like the arm cylinder 7 shown in FIG. 1, the cylinder support portion 7 a that rotatably supports the base end of the boom cylinder that rotates the work boom is provided on the lower end side of each side frame 13. Yes. A part of the side end portion of each side frame 13 connected to the rear end surface 13a and the rear end surface 13a of each side frame 13 is configured as a rear cover 18.

  That is, in the illustrated example, an outer plate 18 is provided on the rear outer surface of each side frame 13, and the outer plate 18 is bent at the rear portion to constitute a rear cover 18. The vehicle rear side of the rear cover 18 serves as a rear end surface 13a in the side frame 13.

At the lower ends of the pair of left and right side frames 13, a thick sheet metal 15 is provided as a reinforcing member that is inserted between the side surfaces of the opposing side frames 13 and contacts the rear end surfaces of the side frames 13.
That is, the thick sheet metal 15 is configured in a lateral T-shape as shown in the plan view of FIG. The left and right insertion portions 15c in the thick sheet metal 15 can be inserted between the side surfaces of the opposing side frames 13. The thick sheet metal 15 inserted between the side surfaces of the opposing side frames 13 can be arranged in parallel with the bottom frame 14.

  That is, for example, the thick sheet metal 15 can be disposed so that the upper surface of the thick sheet metal 15 is in a horizontal arrangement relationship with respect to the vehicle body. Alternatively, for example, when the rear end portion side of the bottom frame 14 is configured to be inclined upward, the thick sheet metal is so arranged that the upper surface of the thick sheet metal 15 is inclined with respect to the vehicle body. 15 can also be arranged.

  As shown in FIGS. 4 and 5, the rear end portion 15a of the thick sheet metal 15 is shaped to travel to the rear side of the vehicle with respect to the rear cover formed by the rear end surface 13a of each side frame 13. It is configured. Further, both side end portions 15b of the thick sheet metal 15 are configured to be able to embrace the rear end surfaces 13a of the side frames 13 in the left-right direction of the vehicle.

  4 and 5 show the tailgate 10 as a part of the engine cover that covers the rear portion of the engine compartment 23 (see FIG. 2). The height of the tailgate 10 is set at a height position where the rear view from the driver's seat can be widened because no reinforcing member for reinforcing the pair of side frames 13 is provided above the engine compartment 23. it can.

  After the thick sheet metal 15 thus configured is inserted between the side surfaces of the opposing side frames 13, the thick sheet metal 15 can be fixed to the rear end side of the bottom frame 14 by welding or the like. Further, the insertion portion 15c of the thick metal plate 15 and the side surface of each side frame 13 can be fixed by welding or the like. Further, if necessary, both side end portions 15b of the thick sheet metal 15 can be fixed to the rear end surfaces 13a of the side frames 13 by welding or the like.

  By configuring in this way, the thick sheet metal 15 can be configured as a reinforcing member for the pair of side frames 13 and can also have a function as a bumper that protects the rear end surfaces 13a and the like of the side frames 13 from damage. .

  In the present invention, an L-shaped gusset 17 is arranged at the corner portion on the lower end side of each side frame 13 in order to enhance the reinforcing effect on the pair of side frames 13. With the L-shaped gusset 17 arranged in the corner portion, the upper surface of the thick sheet metal 15 and the side surface side of each side frame 13 can be fixed by welding or the like, and the reinforcing effect on the pair of side frames 13 is enhanced. .

  Further, an inner reinforcing wall 24 is attached to the inner surface of each side frame 13 on the bottom frame 14 side, and an attaching piece 25 for attaching a radiator or the like is provided on the inner reinforcing wall 24. By attaching a radiator or the like between the opposing internal reinforcing walls 24 via attachment pieces 25, the strength between the side frames 13 can be improved by using the radiator or the like as a wall structure.

  For example, a wall structure in which the internal reinforcing walls 24 are connected by housing a radiator, an oil cooler, and the like in the housing and attaching the housing between the opposing internal reinforcing walls 24 via mounting pieces 25 is provided. Can do. In this way, the reinforcement structure obtained by connecting the internal reinforcement walls 24 with the wall structure constituted by the housing containing the radiator, the oil cooler, etc., and the thick sheet metal 15 and the L-shaped gusset 17 were used. The reinforcing effect for the pair of side frames 13 can be greatly enhanced.

  Further, in the present invention, since both side end portions 15b of the thick sheet metal 15 are arranged on the rear end surface 13a of each side frame 13, each side frame 13 is moved back and forth by the both side end portions 15b of the thick sheet metal 15. Can be prevented from being twisted.

  The present invention can be suitably applied as a reinforcing member for a pair of standing side frames.

DESCRIPTION OF SYMBOLS 1 ... Skid steer loader, 3 ... Running body, 3A ... Front wheel, 5 ... Boom support part, 6 ... Lift arm, 6a ... Base end part, 7a ... Cylinder support Part, 12 ... main frame, 13 ... side frame, 13a ... rear end surface, 14 ... bottom frame, 15 ... thick sheet metal, 15a ... rear end, 15b ... Side end part, 15c ... Insertion part, 17 ... L-shaped gusset, 18 ... Outer plate (rear cover), 20 ... Track frame, 23 ... Engine room, 25A, 25B ... Reinforcement Plate-like body, 29 ... working machine cylinder, 41 ... main frame, 42 ... side wall, 43 ... bottom frame, 44 ... tip frame, 45 ... cross member, 46 ... Upright, 47 ... Tie bar, 48 ... Engine chamber, 51 ... Skid steer loader frame, 52 ... Base member, 53 ... Tip edge, 54 ... Rear edge, 55 ... Side edge, 56 ... Side member, 57 ... front member, 58 ... housing chamber, 59 ... reinforcing means, 60 ... rear plate, 61 ... horizontal axis bar.

Claims (4)

A bottom frame in the main frame, having a front end, a rear end and left and right side edges;
A pair of left and right side frames in the main frame, erected from the bottom frame along each side edge,
A boom support portion that rotatably supports the base end portions of a pair of left and right work booms provided with a work tool at the distal end portion via horizontal support shafts arranged in the vehicle width direction;
Have
A vehicle body structure of a skid steer loader in which the boom support portion is provided at each of the pair of side frames on the rear end side of the main frame,
A reinforcing member that is arranged in parallel to the bottom frame and connects and fixes the lower ends of the pair of side frames on the rear end side of the main frame;
An L-shaped gusset for connecting and fixing between the reinforcing member and the side frame at a corner portion on the lower end side of the pair of side frames on the rear end side of the main frame;
A skid steer loader body structure characterized by comprising:   The body structure of a skid steer loader according to claim 1, wherein the reinforcing member is a thick sheet metal connected and fixed to a rear end portion of the bottom frame and a lower end portion of the pair of side frames.   The vehicle body structure of a skid steer loader according to claim 2, wherein a rear end portion of the reinforcing member is traveled to the rear side of the vehicle with respect to a rear end of the rear cover of the skid steer loader.   4. A vehicle body structure for a skid steer loader according to claim 3, wherein the left and right side end portions on the rear end side of the reinforcing member embrace the rear end portion of the rear cover in the left-right direction of the vehicle.

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