Work vehicles

Abstract

To provide a work vehicle which enables reduction of disturbance (vibration and lateral swinging) to a sensor.SOLUTION: A tractor 1 (a work vehicle) includes: a vehicle body 3; a travel device provided at the vehicle body 3; a transmission 5 (a drive device) which drives the travel device; and a support member 77 which is provided at a transmission case 74 of the transmission 5 and supports the vehicle body 3 through a vibration control device 78. The vehicle body 3 includes: a frame 31R which supports a driver seat 10; a bracket 80 which may be attached to the frame 31R; and an inertia measurement device 42 (a sensor) which is provided at the bracket 80 and detects an acceleration rate and an angular speed of the vehicle body 3.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a work vehicle, for example a tractor. [Background technology]

[0002] 2. Description of the Related Art A work vehicle disclosed in Patent Document 1 is known in the art. The work vehicle disclosed in Patent Document 1 comprises a traveling machine body having a traveling device, a receiving device that acquires position information of the traveling machine body by a satellite positioning system, and an inertial measurement unit that measures inertial information of the traveling machine body. In the work vehicle described in Patent Document 1, it is possible to grasp the position and orientation of the traveling machine body based on the position information acquired by the receiving device and the inertial information measured by the inertial measurement unit. In addition, a prime mover (an engine and a bonnet that houses the engine) is provided in the front half of the traveling machine body. A driver's section in which a driver sits is provided in the rear half of the traveling machine body. The driver's section comprises a driver's seat in which the driver sits, and a front panel located in front of the driver's seat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-99223 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the work vehicle described in Patent Document 1, the inertial measurement unit is placed and supported on a horizontal surface of a pedestal provided on a front panel frame supporting the front panel, below a control tower provided on the front panel of the driver's seat. The driver's seat is susceptible to vibrations from the running gear (wheels, etc.), and may be affected by lateral shaking. In other words, in order to improve the accuracy of the inertial information of the inertial measurement unit, it is necessary to reduce disturbances (vibrations, lateral shaking) to sensors such as the inertial measurement unit. The present invention has been made in view of the above-mentioned conventional techniques, and has an object to provide a work vehicle capable of reducing disturbances (vibrations and lateral shaking) to sensors. [Means for solving the problem]

[0005] A work vehicle according to one aspect of the present invention includes a vehicle body, a traveling device provided on the vehicle body, a drive device that drives the traveling device, and a support member that is provided on a housing of the drive device and supports the vehicle body via a vibration isolation device. The vehicle body includes a frame that supports a driver's seat, and a support member that can be attached to the frame. and disposed at a position where it does not come into contact with the support member. A bracket and a sensor provided on the bracket for detecting at least one of an acceleration and an angular velocity of the vehicle body. The bracket is attached to the frame of the vehicle body that is vibration-isolated by the vibration isolation device. . Preferably, the drive unit is positioned below the frame in the widthwise center of the vehicle body and extending in the fore-and-aft direction of the vehicle body, and the bracket is attached to an attachment position of the frame corresponding to a position separated in the widthwise direction from the widthwise center of the vehicle body. Preferably, the work vehicle is provided with a coupling device to which a work implement can be attached at the rear of the vehicle body, and the bracket is attached to the frame below the frame. The opposite position to the rear side near the coupling device It is mounted in the front position.

[0006] Preferably, a cover member for covering the sensor provided on the bracket is attached to the bracket. Preferably, the cover member has a side wall disposed outside the sensor in the width direction, and a rear wall disposed behind the sensor. Preferably, the cover member has a bottom wall located below the sensor. Preferably, the cover member has a cutout portion formed by cutting out at least a portion of the bottom wall. Preferably, the cover member includes a first holding portion for holding a harness connected to the sensor.

[0007] Preferably, the running gear has a front wheel arranged at the front of the vehicle body and a rear wheel arranged at the rear of the vehicle body, and the vehicle body has a fender located rearward of the position of the bracket on the frame and above the rear wheel, and an extension member located between the position of the bracket on the frame and the fender and extending downward below the position of the front end of the fender. Preferably, the work vehicle is provided with a regulating member attached to the extension member and for regulating a harness connected to the sensor in a direction toward the bracket, and the regulating member has a second holding portion for holding the harness. Preferably, the first holding portion and the second holding portion route the harness in a space between the vehicle body and the drive device. Effect of the Invention

[0008] According to the above-described work vehicle, disturbances (vibrations and lateral shaking) to the sensor can be reduced. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is an external perspective view of a work vehicle (tractor). [Diagram 2] FIG. 2 is a right side view of the work vehicle (tractor) of FIG. [Diagram 3] FIG. 2 is a front view of the work vehicle (tractor) of FIG. [Figure 4] FIG. 2 is a perspective view of a main configuration including a cabin portion of the vehicle body and a transmission, etc., as viewed from a lower right front position. [Diagram 5] FIG. 2 is a right side view of a main configuration including a cabin portion of the vehicle body and a transmission, etc. [Figure 6] FIG. 2 is a left side view of a main configuration including a cabin portion of the vehicle body and a transmission, etc. [Figure 7] 5 is a plan view showing a transmission and other components with a cabin portion of the vehicle body in FIG. 4 removed. FIG. [Figure 8] 5 is a partial perspective view of a lower front right corner of a cabin portion of the vehicle body of FIG. 4 as viewed from the right rear. [Figure 9] 5 is a partial perspective view of a lower front right corner of a cabin portion of the vehicle body of FIG. 4 as viewed from the rear left. [Figure 10] 5 is a partial perspective view of a lower front right corner of a cabin portion of the vehicle body of FIG. 4 when viewed down from the right front. [Figure 11] FIG. 4 is an exploded perspective view showing a state in which a cover member is removed from a bracket to which a sensor is attached. [Figure 12] 1 is an exploded perspective view of the bracket, the sensor, and the cover member as viewed from the rear right. FIG. [Figure 13] 2 is an exploded perspective view of the bracket, the sensor, and the cover member viewed from the left side. FIG. [Figure 14] 5 is a right side view of a lower front right corner of a cabin portion of the vehicle body of FIG. 4. FIG. [Figure 15] FIG. 5 is a left side view of a lower front right corner of a cabin portion of the vehicle body of FIG. 4. [Figure 16] FIG. 5 is a bottom view of the lower front right corner of the cabin portion of the vehicle body of FIG. 4. [Figure 17] 5 is a front view of a lower right front corner of a cabin portion of the vehicle body of FIG. 4. [Figure 18] FIG. 5 is a rear view of the lower front right corner of the cabin portion of the vehicle body of FIG. 4. [Figure 19] 1 is a perspective view of a sensor protection structure showing a state in which a cover member is attached to a bracket to which a sensor is attached. FIG. [Figure 20] FIG. 20 is a left side view of the sensor protection structure shown in FIG. [Figure 21] FIG. 20 is a rear view of the sensor protection structure shown in FIG. [Figure 22] FIG. 20 is a right side view of the sensor protection structure shown in FIG. [Diagram 23] FIG. 20 is a front view of the sensor protection structure shown in FIG. [Figure 24] FIG. 20 is a plan view of the sensor protection structure shown in FIG. [Diagram 25] FIG. 20 is a bottom view of the sensor protection structure shown in FIG. [Figure 26]3 is an enlarged partial right side view of a portion of the work vehicle shown in FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. <Overview of the work vehicle> Fig. 1 is an external perspective view showing a work vehicle (tractor 1) of one embodiment. Fig. 2 is a right side view of the tractor 1 shown in Fig. 1. Fig. 3 is a front view of the tractor 1 shown in Fig. 1. In the case of this embodiment, the work vehicle is the tractor 1. However, the work vehicle is not limited to the tractor 1, and may be an agricultural machine (agricultural vehicle) such as a combine harvester or transplanter, or a construction machine (construction vehicle) such as a loader work machine.

[0011] Hereinafter, the direction in which the driver seated in the driver's seat 10 of the tractor (work vehicle) 1 faces (the direction of arrow A1 in Fig. 2) will be referred to as the forward direction, and the opposite direction (the direction of arrow A2 in Fig. 2) will be referred to as the rearward direction. The right side of the driver (the direction of arrow B1 in Fig. 3) will be referred to as the right side, and the left side of the driver (the direction of arrow B2 in Fig. 3) will be referred to as the left side. In addition, the horizontal direction (the direction of arrow B3 in Fig. 3), which is perpendicular to the fore-aft direction of the tractor 1 (the direction of arrow A3 in Fig. 2), will be referred to as the vehicle body width direction (or width direction).

[0012] As shown in Fig. 2, the tractor 1 includes a vehicle body 3, a prime mover 4, and a transmission 5 (drive device). The vehicle body 3 has a traveling device 7 and is capable of traveling. The traveling device 7 is a device having front wheels 7F and rear wheels 7R. The front wheels 7F may be of either a tire type or a crawler type. The rear wheels 7R may also be of either a tire type or a crawler type. The prime mover 4 is a diesel engine, an electric motor, or the like, and in this embodiment is configured as a diesel engine. The transmission 5 is capable of switching the propulsive force of the traveling device 7 by shifting gears, and is also capable of switching the traveling device 7 between forward and reverse. The transmission 5 is covered by a housing (transmission case 74). The vehicle body 3 is provided with a cabin 9. Inside the cabin 9, a driver's seat 10 is provided.

[0013] A connecting section 8 formed of a three-point link mechanism or the like is provided at the rear of the vehicle body 3. A working implement 2 can be attached and detached to the connecting section 8. By connecting the working implement to the connecting section 8, the working implement can be towed by the vehicle body 3. The working implements include a tilling implement for tilling, a fertilizer spreader for spreading fertilizer, a pesticide spreader for spreading pesticide, a harvesting implement for harvesting, a reaping implement for reaping grass and the like, a spreading implement for spreading grass and the like, a grass collecting implement for collecting grass and the like, a shaping implement for shaping grass and the like, and the like. A level control device (Monroe) for keeping the working implement horizontal is provided at the rear of the vehicle body 3.

[0014] <Specific configuration of the vehicle body, etc.> As shown in FIG. 2, the tractor 1 has a front axle frame 70, a flywheel housing 71, a clutch housing 72, and a transmission case 74. The front axle frame 70 is disposed at the front of the tractor 1 and rotatably supports the axle (front axle) of the front wheels 7F. The front axle frame 70 also supports the prime mover 4 and extends forward from the prime mover 4. The front axle frame 70, flywheel housing 71, clutch housing 72, and transmission case 74 are integrally connected to form a highly rigid body frame.

[0015] The flywheel housing 71 is connected to a rear part of the prime mover 4 and houses a flywheel connected to an output shaft of the prime mover 4. The clutch housing 72 is connected to the flywheel housing 71 and houses a clutch that intermittently transmits the power of the prime mover 4 transmitted via the flywheel. The transmission case 74 is connected to a rear part of the clutch housing 72 and extends rearward from the clutch housing 72. The transmission case 74 houses the transmission 5 and a rear wheel differential device. 2, a bonnet 76 is attached to an upper portion of the front axle frame 70. The bonnet 76 covers the prime mover 4.

[0016] <Vehicle body vibration-proof structure> As shown in Figures 4 to 7, a transmission case 74 (housing) of the transmission 5 is provided with a support member 77 that supports the vehicle body 3 via a vibration isolator 78. Figures 4 to 6 are a perspective view, a right side view, and a left side view, respectively, of a main configuration including a cabin portion of the vehicle body and the transmission etc. Figure 7 is a plan view showing the transmission etc. with the cabin portion of the vehicle body of Figure 4 removed.

[0017] Specifically, the support member 77 includes a pair of first support members 77A extending obliquely upward from the front right side and front left side of the transmission case 74, and a pair of second support members 77B extending upward from the rear right upper side and rear left upper side of the transmission case 74. The vibration isolator 78 is a device or member for suppressing vibration of the vehicle body 3, and is, for example, an elastically deformable member such as rubber or a spring, a damper device, a suspension device, or the like. Here, the vibration isolator 78 includes a first vibration isolator 78A and a second vibration isolator 78B. The first vibration isolator 78A is, for example, a mount rubber. The second vibration isolator 78B is, for example, a spring suspension. The second vibration isolator 78B may be, for example, an air suspension, a damper device, or the like. The pair of first support members 77A, that is, the left and right first support members 77A, receive and support the vehicle body 3 from below via the first vibration isolator 78A (mount rubber). Further, the pair of second support members 77B, i.e., the left and right second support members 77B, receive and support the vehicle body 3 from below via a second vibration isolator 78B (spring suspension). That is, the vehicle body 3 is supported by the support members 77 of the transmission case 74 via the vibration isolator 78. This results in a structure in which vibration to the vehicle body 3 is reduced.

[0018] The combination of the support members 77 and the vibration isolators 78 is not limited to the contents of this embodiment. For example, the first support members 77A and the first vibration isolators 78A may be provided on the rear side of the transmission case 74, and the second support members 77B and the second vibration isolators 78B may be provided on the front side of the transmission case 74. Furthermore, the vibration isolators 78 may all be first vibration isolators 78A (mount rubber), or all be second vibration isolators 78B (spring suspension, air suspension, or damper device), or may be other vibration isolators.

[0019] <Cabin Overview> As shown in Figs. 4 to 6, the cabin 9 is provided on a floor base portion 30 of the vehicle body 3. The floor base portion 30 has a substantially rectangular shape in a plan view and a lower rear portion thereof in a side view. The floor base portion 30 has a protruding portion 36 that protrudes upward in an arc shape so as to fit along the fender 13 of the tractor 1. The floor base portion 30 is, for example, a metal member. The cabin 9 includes a plurality of (for example, four) pillars 9a that are fixed to the four corners of the floor base portion 30 and extend upward, and a roof 9b that is supported by the plurality of pillars 9a and is disposed above the driver's seat 10. The cabin 9 is provided with glass, doors, etc. between the plurality of pillars 9a, and covers the driver's seat 10 with the glass, doors, etc. In addition, fenders 13 are attached to the left and right side portions at the rear lower portion of the cabin 9, and the fenders 13 cover the upper portions of the rear wheels 7R.

[0020] The floor base portion 30 is equipped with a right frame 31R and a left frame 31L that support the driver's seat 10. As shown in Figs. 4 and 5, the right frame 31R is configured by connecting a connecting frame 32R that is linear in side view to a side lower frame 33R that is arc-shaped in side view. The connecting frame 32R has a front end connected to the right front end support pillar 9a and a rear end The left frame 31L is connected to the side lower frame 33R. The side lower frame 33R extends from the lower part of the support pillar 9a at the right rear end so as to transition downward as it goes forward, and the lower end is connected to the rear end of the connecting frame 32R. The left frame 31L is also configured similarly to the right frame 31R. As shown in Figs. 4 and 6, the left frame 31L is configured by connecting a connecting frame 32L that is linear in side view to a side lower frame 33L that is arc-shaped in side view. The connecting frame 32L has a front end connected to the support pillar 9a at the left front end and a rear end connected to the side lower frame 33L. The side lower frame 33L extends from the lower part of the support pillar 9a at the left rear end so as to transition downward as it goes forward, and the lower end is connected to the rear end of the connecting frame 32L.

[0021] <Outline of position detection device> As shown in Fig. 1, the tractor 1 is provided with a position detection device 40. The position detection device 40 is a device that detects its own position (positioning information including latitude and longitude) using a satellite positioning system (positioning satellite) such as D-GPS, GPS, GLONASS, Hokuto, Galileo, and Michibiki. That is, the position detection device 40 receives a reception signal (position of the positioning satellite, transmission time, correction information, etc.) transmitted from the positioning satellite, and detects the position (e.g., latitude and longitude) based on the reception signal. The position detection device 40 has a receiving device 41 and an inertial measurement unit (IMU) 42.

[0022] The receiving device 41 has an antenna and the like and receives a signal transmitted from a positioning satellite, and is attached to the vehicle body 3 separately from the inertial measurement unit 42. In this embodiment, the receiving device 41 is attached to a cabin 9 provided in the vehicle body 3. Note that the attachment location of the receiving device 41 is not limited to that in the embodiment. The inertial measurement unit 42 has an acceleration sensor that detects acceleration, a gyro sensor that detects angular velocity, etc. The inertial measurement unit 42 is provided on the vehicle body 3, and can detect the roll angle, pitch angle, yaw angle, etc. of the vehicle body 3. The location of the inertial measurement unit 42 will be described later.

[0023] <Location of receiving device, etc.> Next, the arrangement of the receiving device 41 constituting the position detection device 40 will be described. The receiving device 41 receives a signal from a positioning satellite and detects the position of the vehicle body 3 based on the received signal. That is, the receiving device 41 is a device that detects the position information of the vehicle body 3 by a satellite positioning system (GNSS: Global Navigation Satellite System). For example, a GPS (Global Positioning System) is used as the satellite positioning system. For example, the receiving device 41 receives a signal transmitted from a positioning satellite and a signal transmitted from a base station installed on the ground, and calculates the position of the vehicle body 3 based on the received signal. In detail, the base station transmits correction information including the position information (reference position) of the base station and information (satellite-to-receiver distance, etc.) obtained by the signal from the positioning satellite to the receiving device 41 by wireless communication or the like. The receiving device 41 corrects the information received from the positioning satellite based on the correction information acquired from the base station to obtain position information with higher accuracy. However, other methods such as an RTK method may be used as a method for detecting the vehicle body position by the receiving device 41.

[0024] As shown in FIG. 1, the receiving device 41 is attached to the cabin 9. Specifically, the receiving device 41 is attached to the front end side of the roof 9b of the cabin 9 and to the center in the vehicle body width direction. Therefore, the receiving device 41 is located above and in front of the driver's seat 10. When viewed from the driver's seat 10 as a reference, the receiving device 41 is offset (displaced) forward from the driver's seat 10. ) position. When viewed from the tractor 1, the receiving device 41 is located approximately at the center of the tractor 1 in the front-rear direction and at the center of the tractor 1 in the vehicle body width direction.

[0025] However, the mounting position of the receiving device 41 is not limited to the position shown in Fig. 1. For example, the receiving device 41 may be disposed in a position offset to the rear or side of the cabin 9. The receiving device 41 may also be attached to a support 9a of the cabin 9, or may be disposed between two adjacent supports 9a, or may be attached to a location other than the cabin 9 of the tractor 1. Also, a rope or a canopy may be used instead of the cabin 9 of the tractor 1, and the receiving device 41 may be attached to the rope or the canopy.

[0026] <Outline of the control device> As shown in Figs. 1 to 3, the tractor 1 includes a control device 60. The control device 60 is a device that controls the traveling system, the working system, calculates the vehicle body position, and the like in the tractor 1. The control device 60 controls the traveling system and the working system of the tractor 1 based on operation signals when various operating devices (operation levers, switches, dials, etc.) installed in the cabin 9 are operated, and detection signals of sensors installed in various places on the vehicle body 3. The control device 60 also receives a reception signal (reception information) received by the receiving device 41 and measurement information (acceleration, angular velocity, etc.) measured by the inertial measurement device 42, and determines the vehicle body position based on the reception information and the measurement information. The control device 60 also outputs attitude information of the vehicle body 3 (for example, roll angle information of the vehicle body 3) acquired from the measurement information (acceleration, angular velocity, etc.) measured by the inertial measurement device 42 to the horizontal control device. The horizontal control device uses the attitude information of the vehicle body 3 to control the working device horizontally. In other words, the horizontal control device can maintain the working device horizontally even if the vehicle body 3 is tilted.

[0027] <Location of control devices, etc.> As shown in Figs. 1 to 3, the control device 60 has a housing and a circuit board arranged in the housing. The circuit board is composed of various electric and electronic components (CPU, non-volatile memory, etc.) such as semiconductors, and the above-mentioned control can be performed by the CPU executing a program stored in the memory. The tractor 1 has, for example, a plurality of control devices 60, and as shown in Fig. 2, of the plurality of control devices 60, a horizontal control device that performs horizontal control is supported by a support member 9c on the right side of the cabin 9. The arrangement of the control device 60 will be described below using the horizontal control device as an example.

[0028] Specifically, the housing of the control device 60 is a rectangular parallelepiped and is arranged vertically. The support member 9c is, for example, a cylindrical or rod-shaped member, and is formed into an approximately J-shape connecting the right end of the roof 9b and the right rear end support pillar 9a. The support member 9c hangs down from the right end of the roof 9b, then bends toward the right rear end support pillar 9a and extends to approach the rear end support pillar 9a, and further bends toward the roof 9b and extends to approach the roof 9b, then bends toward the right rear end support pillar 9a and is connected to the right rear end support pillar 9a. The support member 9c may have a shape other than an approximately J-shape, as long as it is a shape that supports the control device 60. The housing of the control device 60 is supported at two points by the support member 9c. In detail, of the three sides (length, width, height) of the housing of the control device 60, the shortest side faces the vehicle body width direction, and the longest side faces the front-rear direction. In this way, the shortest side of the control device 60 faces the vehicle body width direction. This reduces the area occupied by the control device 60 in the vehicle body width direction, so that the control device 60 can be arranged along the glass surface on the right side of the cabin 9. The arrangement of the control device 60 is not limited to this embodiment, and the control device 60 may be arranged at any location in the cabin 9, on a cover for an operating device provided in the cabin 9, or inside an interior panel of the cabin 9.

[0029] <Inertial measurement device placement, etc.> Next, the arrangement of the inertial measurement unit 42 constituting the position detection device 40 will be described. The inertial measurement unit 42 is a device that measures the inertia of the vehicle body 3. 2 can measure inertia (inertial information) such as the yaw angle, pitch angle, roll angle, etc. of a vehicle body 3. 4 and 7, the inertial measurement unit 42 is attached to a bracket 80 at an end position below the cabin 9, specifically below the floor base portion 30 of the vehicle body 3, away from the center in the width direction of the vehicle body 3 (center line CL1 in the vehicle body width direction shown in FIG. 7) to the right in the width direction, and at a position on the front side of the vehicle body 3. In other words, the inertial measurement unit 42 is disposed below the floor base portion 30 of the vehicle body 3, at the front right corner.

[0030] 7, the transmission case 74 of the transmission 5 is disposed below the floor base portion 30 of the vehicle body 3, at the center of the vehicle body 3 in the width direction, and extending in the front-rear direction of the vehicle body 3. The bracket 80 and the inertial measurement unit 42 are disposed in a position that does not overlap with the transmission case 74 in a plan view. The bracket 80 and the inertial measurement unit 42 are disposed in a position that does not overlap with the transmission case 74 in a side view. Therefore, the bracket 80 and the inertial measurement unit 42 can be disposed in a position that does not interfere with the transmission case 74. 7, the bracket 80 and the inertial measurement unit 42 are disposed in a front position away from the connecting portion 8 in a plan view. When a working implement is attached to the connecting portion 8, the inertial measurement unit 42 is disposed away from the working implement, so that transmission of vibrations of the working implement to the inertial measurement unit 42 can be reduced.

[0031] <Inertial measurement unit support structure (mounting structure)> The support structure (mounting structure) of the inertial measurement unit 42 will be described below with reference to Figs. 8 to 18 and the like. Figs. 8 to 10 are each a partial perspective view of the lower right front corner of the cabin portion of the vehicle body 3 in Fig. 4. Fig. 11 is an exploded perspective view showing a state in which the cover member has been removed from the bracket to which the sensor is attached. Figs. 12 and 13 are each an exploded perspective view of the bracket, sensor, and cover member. Figs. 14 to 18 are respectively a right side view, a left side view, a bottom view, a front view, and a rear view of the lower right front corner of the cabin portion of the vehicle body in Fig. 4.

[0032] As shown in Figures 4 and 8, a bracket 80 is attached to the connecting frame 32R of the right frame 31R of the floor base portion 30. The inertial measurement unit 42 is attached to this bracket 80. As shown in Figures 8 and 11, the bracket 80 is fixed with a bolt 84 to the connecting frame 32R of the right frame 31R.

[0033] 11 to 14, the bracket 80 is a member to which the inertial measurement unit 42 is attached. The bracket 80 is, for example, a metal member that is L-shaped in side view. Specifically, the bracket 80 includes an upper plate portion 81 that abuts against the lower surface of the connecting frame 32R, and an extending plate portion 82 that bends downward at the rear side of the upper plate portion 81 and extends downward. The inertial measurement unit 42 is attached to this extending plate portion 82.

[0034] The upper plate portion 81 of the bracket 80 has through holes 81a in the front and rear directions, into which the bolts 84 are inserted. Two through holes 81a of the bracket 80 are formed at an interval in the connecting frame 32R direction. On the lower surface of the connecting frame 32R, as shown in Fig. 12, screw holes 32a are formed at positions corresponding to the two through holes 81a of the bracket 80 (i.e., mounting positions on the connecting frame 32R). With the bracket 80 in contact with the lower surface of the connecting frame 32R, bolts 84 are inserted into the two through holes 81a of the bracket 80, respectively, and each bolt 84 is screwed into each screw hole 32a of the connecting frame 32R, whereby the bracket 80 is fixed to the lower surface of the connecting frame 32R, as shown in Fig. 11. In this manner, the bracket 80 is attached to the mounting position of the connecting frame 32R of the right frame 31R, which corresponds to the end and forward position in the width direction of the vehicle body 3.

[0035] In addition, the bracket 80 can be connected by loosening the bolt 84 and removing it from the screw hole 32a. In other words, the bracket 80 is detachable from the connecting frame 32R. The inertial measurement unit 42 has through holes 42a formed in each mounting portion located on the upper and lower ends when the inertial measurement unit 42 is mounted to the bracket 80. As shown in Fig. 12, the extension plate portion 82 of the bracket 80 has screw holes 82a formed in positions corresponding to the through holes 42a on the upper and lower ends of the inertial measurement unit 42 (i.e., sensor mounting positions on the bracket 80). In other words, the screw holes 82a are formed in two positions in the vertical direction on the left end side of the extension plate portion 82.

[0036] With the inertial measurement unit 42 in contact with the extension plate portion 82 of the bracket 80, 11, the inertial measurement unit 42 is fixed to the extending plate portion 82 of the bracket 80 by inserting the bolts 43 into the two through holes 42a of the bracket 80 and screwing the bolts 43 into the screw holes 82a. In this manner, the inertial measurement unit 42 can be mounted on the bracket 80 in a predetermined mounting position. In this mounting position, for example, the inertial measurement unit 42 is in a vertical position (for example, a position in which mounting portions at both ends of the inertial measurement unit 42 are positioned in the vertical direction) and is perpendicular to the front-rear direction of the vehicle body 3 (a position in which the surface of the inertial measurement unit 42 that abuts against the extending plate portion 82 of the bracket 80 is perpendicular to the front-rear direction of the vehicle body 3). Note that the mounting position of the inertial measurement unit 42 is not limited to this, and it is sufficient that the inertial measurement unit 42 is mounted on the bracket 80 in an appropriate mounting position depending on the type, use, etc. of the inertial measurement unit 42.

[0037] Moreover, by loosening the bolt 43 and removing the bolt 43 from the screw hole 82a, the inertial measurement unit 42 can be removed from the extension plate portion 82 of the bracket 80. That is, the inertial measurement unit 42 is detachable from the bracket 80. The inertial measurement unit 42 is connected to the control device 60 via a harness 100 as shown in FIG. 7. Specifically, the inertial measurement unit 42 includes a connector portion 42b. A connector 101 at one end of the harness 100 is connected to the connector portion 42b of the inertial measurement unit 42. A connector at the other end of the harness 100 is connected to the connector portion of the control device 60. The harness 100 is passed through a through hole 30a (see FIGS. 10 and 11) of the floor base portion 30 from the control device 60 in the cabin 9, drawn out to the lower outside of the cabin 9, and connected to the inertial measurement unit 42 provided on the bracket 80. A rubber grommet 30b is provided in the through hole 30a as a harness protection part. The grommet 30b has a disk-shaped outer shape and has a through hole in its center. The harness 100 is inserted through the through hole of the grommet 30b and is protected by the grommet 30b.

[0038] 11 to 14, the cover member 90 is a member for covering the inertial measurement unit 42 provided on the bracket 80. The cover member 90 is, for example, a metal member. Specifically, the cover member 90 has a side wall 91 located on the right side, a rear wall 92 located at the rear, a bottom wall 93 located below, and a notch portion 94 formed by cutting out a part (left end portion) of the bottom wall 93. 20 , which will be described later, the front end (front end) of the side wall 91 is located forward of the front end (front end) of the inertial measurement unit 42, and the rear end (rear end) of the side wall 91 is located rear of the rear end (rear end) of the inertial measurement unit 42. In other words, the side wall 91 is disposed from the front end to the rear end of the inertial measurement unit 42.

[0039] 21 described later, the inner end (left end) of the rear wall 92 in the width direction is located more inward (left side) than the inner end (left end) of the inertial measurement unit 42, and the outer end (right end) of the rear wall 92 in the width direction is located more outward (right side) than the outer end (right end) of the inertial measurement unit 42. In other words, the rear wall 92 is disposed from the first end (left end) in the width direction of the inertial measurement unit 42 to the second end (right end), which is the end opposite the first end in the width direction. 22, which will be described later, the front end (front end) of the bottom wall 93 is located forward of the front end (front end) of the inertial measurement unit 42, and the rear end (rear end) of the bottom wall 93 is located rear of the rear end (rear end) of the inertial measurement unit 42. In other words, the bottom wall 93 is disposed across the inertial measurement unit 42 from the front end to the rear end.

[0040] Further, the side wall 91 is provided with an attachment portion 95 that abuts against the bracket 80. The attachment portion 95 of the cover member 90 has two through holes 95a, into which bolts 99 are inserted, formed at an interval in the front-rear direction. Furthermore, the extension plate portion 82 of the bracket 80 has screw holes 82b formed at two positions in the up-down direction on the right end side. The screw holes 82b are screw holes into which bolts 99 for attaching the cover member 90 are screwed. With the attachment portion 95 of the cover member 90 abutting against the extension plate portion 82 of the bracket 80, the bolts 99 are inserted into the two through holes 95a of the attachment portion 95, respectively, and the bolts 99 are screwed into the screw holes 82b, so that the cover member 90 is fixed to the extension plate portion 82 of the bracket 80 as shown in FIG. 11 and FIG. 12. In this manner, the cover member 90 is attached to the bracket 80 in a state in which it covers the inertial measurement unit 42 provided on the bracket 80.

[0041] By loosening the bolt 99 and removing the bolt 99 from the screw hole 82b, the cover member 90 can be removed from the bracket 80. In other words, the cover member 90 is detachable from the bracket 80. 18 and 21, which will be described later, the rear wall 92 of the cover member 90 has a rectangular cutout portion 94 cut out at the lower left corner when viewed from the rear. The rear wall 92 also has a protruding wall 96 that protrudes rearward from an end portion above the cutout portion 94 on the left end side.

[0042] 19 to 25 will be used to explain the sensor protection structure, showing a state in which a cover member 90 is attached to a bracket 80 to which an inertial measurement unit 42 (sensor) is attached. Figs. 19 to 25 are respectively a perspective view, a left side view, a rear view, a right side view, a front view, a plan view, and a bottom view of the protection structure for an inertial measurement unit 42 (sensor). 19, 20, 22, 24, and 25, the cover member 90 is attached to the bracket 80 in a state in which it covers the inertial measurement unit 42 provided on the bracket 80 with a gap therebetween. In other words, the cover member 90 covers the inertial measurement unit 42 without contacting it. Note that the cover member 90 may be attached to the bracket 80 in a state in which it covers the inertial measurement unit 42 provided on the bracket 80 with no gap therebetween. In other words, the cover member 90 may be in contact with the inertial measurement unit 42 to cover it.

[0043] 19, a wall portion that bends and extends forward from the right end side of the rear wall 92 serves as a side wall 91. In addition, a wall portion that bends and extends forward from the lower right side portion of the rear wall 92 serves as a bottom wall 93. As shown in Fig. 19, the connector portion 42b of the inertial measurement unit 42 protrudes beyond the extending plate portion 82 of the bracket 80. Specifically, as shown in Figs. 21, 23, and 24, the connector portion 42b of the inertial measurement unit 42 protrudes by a length L1 beyond the extending plate portion 82 of the bracket 80. This makes it easy to attach and detach the connector 101 of the harness 100 to and from the connector portion 42b of the inertial measurement unit 42.

[0044] 8, 9, and 12, the cover member 90 includes a first holding portion 110 that holds a harness 100 connected to the inertial measurement unit 42. As shown in Figs. 11 and 12, a through hole 96a is formed in the wall 96. As shown in Fig. 12, the first holding part 110 is composed of a binding part 113 and the through hole 96a. The binding part 113 has a binding part 111 that binds the harness 100 and a locking part 112 that is inserted into the through hole 96a of the cover member 90 and locks to the through hole 96a. In this embodiment, the binding part 111 can firmly bind the harness 100, and the binding part 111 is fixed at the binding position of the harness 100 after binding. For this reason, it is difficult to move the binding part 113 in the length direction of the harness 100 after binding.

[0045] As shown in FIG. 9, in a state where the connector 101 of the harness 100 is connected to the connector portion 42b of the inertial measurement unit 42, as long as the portion of the harness 100 located at the through hole 96a of the protruding wall 96 of the cover member 90 (first bundling portion) can be bundled to the bundling portion 11 of the bundling part 113 (bundling portion), the connector 101 of the harness 100 may be connected to the connector portion 42b of the inertial measurement unit 42 or may not be connected. Next, by inserting the locking portion 112 of the bundling part 113, which has bundled the harness 100 with the bundling portion 111, into the through hole 96a of the protruding wall 96 of the cover member 90, the locking portion 112 of the bundling part 113 is locked to the through hole 96a as shown in FIG. 14 to FIG. 16. Therefore, the harness 100 of the inertial measurement unit 42 is held to the cover member 90 by the first holding portion 110 (bundling part 113).

[0046] In addition, by pushing the binding part 113 in a direction to remove it from the through hole 96a while the locking of the locking part 112 in the through hole 96a is loosened, it is possible to remove the locking part 112 of the binding part 113 from the through hole 96a. Therefore, the locking part 112 of the first holding part 110 (binding part 113) is detachable from the through hole 96a of the cover member 90. The bundling section 111 may be configured to loosely bundling the harness 100. For example, the bundling section 111 may be configured to bundling the harness 100 with a gap therebetween, or to bundling the harness 100 to such an extent that there is no apparent gap but the harness 100 can move in the longitudinal direction. 1 to 3, the vehicle body 3 is equipped with a fender 13. As shown in Figs. 1 and 2, the fender 13 is located rearward of the position of the bracket 80 of the connecting frame 32R and above the rear wheel 7R.

[0047] As shown in FIG. 8, the vehicle body 3 has an extension member 35 extending downward from the lower surface of the floor base portion 30. The extension member 35 is, for example, a metal member. As shown in FIG. 18, the extension member 35 is disposed at a position overlapping the cover member 90 and the bracket 80 in a rear view. In particular, as shown in FIG. 26, the extension member 35 is disposed between the bracket 80 in the connecting frame 32R and the fender 13 in a right side view of the tractor 1, and extends downward from the position of the front end portion 13a of the fender 13. FIG. 26 is a partial right side view showing an enlarged part of the work vehicle shown in FIG. 2. In the right side view of the tractor 1, among the splashes of stones, mud, water, etc. from the rotating rear wheel 7R and the fender 13, the splashes flying toward the inertial measurement unit 42 of the bracket 80 hit the extension member 35 and function as a protective wall. The protection range is the area above the straight line CL2 that connects the front end 13a of the fender 13 and the lower end of the extension member 35. Therefore, the flying debris will not fly above the straight line CL2. In other words, the flying debris will be prevented from heading toward the inertial measurement unit 42 of the bracket 80.

[0048] 8 and 9, a reinforcing member 34 having an L-shape in a cross-sectional view is fixed to the lower part of the floor base portion 30. Specifically, the reinforcing member 34 is a member extending in the width direction of the vehicle body 3 from the boundary position between the connecting frame 32R and the side lower frame 33R below the floor base portion 30. The reinforcing member 34 is, for example, a metal angle steel material. The extending member 35 is fixed to the reinforcing member 34. In addition, a restricting member 130 is attached to the extending member 35. The restricting member 130 is a member for restricting the harness 100 connected to the inertial measurement unit 42 in the direction of the bracket 80.

[0049] Specifically, the restricting member 130 is, for example, an L-shaped metal member, and includes a contact plate portion 130a that contacts the extending member 35 and extends in the width direction, and an extending plate portion 130b that is bent at approximately 90 degrees on the end side opposite to the tip side of the contact plate portion 130a and extends in the front direction of the vehicle body 3. The restricting member 130 is fixed to the extending member 35 by a fastening part 131. The fastening parts 131 are, for example, bolts and nuts. Two through holes are formed in the extension member 35 and the abutment plate portion 130a with a gap therebetween in the width direction. When the abutment plate portion 130a of the restricting member 130 is abutted against the extension member 35, the through hole of the extension member 35 and the through hole of the abutment plate portion 130a match, and the restricting member 130 is fixed to the extension member 35 by the fastening parts 131 by inserting bolts into both through holes and tightening the nuts.

[0050] As shown in Figs. 9 and 11, the restricting member 130 includes a second holding portion 120 that holds the harness 100. The second holding portion 120 has basically the same configuration as the first holding portion 110 described above. That is, the second holding portion 120 includes a binding part 123 that is the same as the binding part 113, and a through hole 130c that is the same as the through hole 96a. As shown in Fig. 16, the binding part 123 includes a binding portion 121 that binds the harness 100, and a locking portion 122 that is inserted into the through hole 130c of the extension plate portion 130b of the restricting member 130 and locks with the through hole 130c. The binding portion 121 is the same as the binding portion 111. The locking portion 122 is the same as the locking portion 112. 14, two through holes 130c are formed in the extending plate portion 130b of the restricting member 130 with a gap therebetween in the front-rear direction of the vehicle body 3. In this embodiment, the binding portion 121 can bind the harness 100 securely, and after binding, the binding portion 121 is fixed at the binding position of the harness 100. Therefore, after binding, it is difficult to move the binding part 123 in the length direction of the harness 100.

[0051] 16, with the connector 101 of the harness 100 connected to the connector portion 42b of the inertial measurement unit 42, a portion of the harness 100 located at the through hole 130c of the extension plate portion 130b of the regulating member 130 (second bundling point) is bound by the bundling portion 121 of the bundling part 123. Note that bundling by the bundling portion 121 may be performed either when the connector 101 of the harness 100 is connected to the connector portion 42b of the inertial measurement unit 42 or when it is not connected, as long as the portion of the harness 100 (second bundling point) can be bound by the bundling portion 121. Next, by inserting the locking portion 122 of the binding part 123, which binds the harness 100 with the binding portion 121, into the through hole 130c of the extension plate portion 130b of the regulating member 130, the locking portion 122 of the binding part 123 is locked in the through hole 130c, as shown in Figures 11, 13 to 18. Therefore, the harness 100 of the inertial measurement unit 42 is held by the regulating member 130 by the second holding portion 120 (binding part 123).

[0052] Moreover, by pushing out the binding part 123 in a direction to remove it from the through hole 130c while the locking of the locking part 122 in the through hole 130c is loosened, it is possible to remove the locking part 122 of the binding part 123 from the through hole 130c. Therefore, the locking part 122 of the second holding part 120 (binding part 123) is detachable from the through hole 130c of the regulating member 130. The bundling part 121 may be configured to loosely bundling the harness 100. For example, the bundling part 121 may be configured to bundling the harness 100 with a gap therebetween, or to bundling the harness 100 to such an extent that there is no apparent gap but the harness 100 can move in the longitudinal direction.

[0053] In the case of the side view shown in FIG. 5, the first holding portion 110 and the second holding portion 120 are in the space between the vehicle body 3 and the transmission 5 (drive device) (i.e., the upper surface of the space between the vehicle body 3 and the transmission 5). 16, the first holding portion 110 and the second holding portion 120 are arranged below the floor base portion 30 in such a manner that the harness portion of the harness 100 close to the connector 101 is linearly guided toward the through hole 30a.

[0054] <Effects> According to the work vehicle (tractor 1) of the above embodiment, the following effects are achieved. The work vehicle (tractor 1) comprises a body 3, a traveling device 7 provided on the body 3, a transmission 5 (drive device) that drives the traveling device 7, and a support member 77 provided on a transmission case 74 (housing) of the transmission 5 and supporting the body 3 via a vibration isolation device 78.The body 3 comprises a frame 31R that supports the driver's seat 10, a bracket 80 that can be attached to the frame 31R, and an inertial measurement unit 42 (sensor) provided on the bracket 80 and that detects the acceleration and angular velocity of the body 3.

[0055] According to this configuration, the vehicle body 3 is supported on the support member 77 of the transmission 5 (drive device) via the vibration isolation device 78, so that the vibration of the vehicle body 3 can be reduced, and the vibration to the inertial measurement unit 42 provided on the vehicle body 3 can be reduced. In addition, the inertial measurement unit 42 is provided on the frame 31R supporting the driver's seat 10 in the vibration-isolated vehicle body 3 via the bracket 80, so that the inertial measurement unit 42 can be provided at the position of the bracket 80 of the frame 31R, that is, at a relatively low position of the work vehicle (e.g., the tractor 1), and the lateral vibration to the inertial measurement unit 42 can be reduced. The lower the installation height of the inertial measurement unit 42, the more effective it is. Therefore, the disturbance (vibration and lateral vibration) to the inertial measurement unit 42 (sensor) can be reduced. In addition, when performing work using the horizontal control device, it is now possible to perform the work while traveling at a speed faster than before.

[0056] Further, the transmission 5 (drive unit) is disposed below the frame 31R in the center of the width of the vehicle body 3 and extending in the front-rear direction of the vehicle body 3, and the bracket 80 is attached to an attachment position of the frame 31R corresponding to a position away from the center of the width of the vehicle body 3 in the width direction. With this configuration, the bracket 80 and the inertial measurement unit 42 can be disposed in positions that do not interfere with the transmission 5 (drive unit), while reducing lateral shaking of the inertial measurement unit 42.

[0057] Further, a coupling portion 8 (coupling device) to which the working device 2 can be attached is provided at the rear of the vehicle body 3, and a bracket 80 is attached to a position below the frame 31R and on the front side of the frame 31R. With this configuration, the inertial measurement unit 42 is provided at a position away from the working device 2, so that it is possible to reduce the transmission of vibrations of the working device 2 to the inertial measurement unit 42. In other words, it is possible to reduce the vibrations of the working device 2 to the inertial measurement unit 42 while reducing lateral shaking to the inertial measurement unit 42.

[0058] Also, a cover member 90 that covers the inertial measurement unit 42 provided on the bracket 80 is attached to the bracket 80. With this configuration, since the inertial measurement unit 42 provided on the bracket 80 is covered by the cover member 90, it is possible to prevent flying objects such as pebbles and soil from directly hitting the inertial measurement unit 42, to protect the inertial measurement unit 42, and to reduce erroneous detection by the inertial measurement unit 42 due to direct hits by flying objects.

[0059] Moreover, the cover member 90 has a side wall 91 disposed on the outer side of the inertial measurement unit 42 in the width direction, and a rear wall 92 disposed behind the inertial measurement unit 42. According to this configuration, the cover member 90 covering the inertial measurement unit 42 provided on the bracket 80 can shield the inertial measurement unit 42 from wind and rain from the sides and prevent flying objects such as pebbles and soil from directly hitting the inertial measurement unit 42 from the rear, thereby protecting the inertial measurement unit 42 and reducing erroneous detection by the inertial measurement unit 42 due to direct hits from flying objects.

[0060] Moreover, cover member 90 has a bottom wall 93 disposed below inertial measurement unit 42. With this configuration, cover member 90 covering inertial measurement unit 42 provided on bracket 80 has bottom wall 93, which makes it possible to prevent pebbles, soil, and other flying objects from below from directly hitting inertial measurement unit 42, protect inertial measurement unit 42, and reduce erroneous detection by inertial measurement unit 42 due to direct hits by flying objects.

[0061] Moreover, the cover member 90 has a notch portion 94 formed by cutting out at least a portion of the bottom wall 93. According to this configuration, the cover member 90 covering the inertial measurement unit 42 provided on the bracket 80 has the notch portion 94 in the bottom wall 93, so that even if water, dust, etc. enter the internal space formed between the bracket 80 and the cover member 90, the water, dust, etc. are expelled from the notch portion 94, thereby preventing the water, dust, etc. from accumulating in the internal space.

[0062] Moreover, the cover member 90 includes a first holding portion 110 that holds the harness 100 connected to the inertial measurement unit 42. With this configuration, the cover member 90 not only covers the inertial measurement unit 42 provided on the bracket 80, but also holds the harness 100 of the inertial measurement unit 42 by the first holding portion 110 of the cover member 90, so that it is possible to reduce transmission of vibration through the harness 100 to the inertial measurement unit 42, and to reduce erroneous detection in the inertial measurement unit 42 due to vibration of the harness 100. Furthermore, the position of the harness 100 can be regulated by the first holding portion 110.

[0063] The traveling device 7 has a front wheel 7F arranged at the front of the vehicle body 3 and a rear wheel 7R arranged at the rear of the vehicle body 3, and the vehicle body 3 has a fender 13 located rearward of the position of the bracket 80 of the frame 31R and located above the rear wheel 7R, and an extension member 35 located between the position of the bracket 80 on the frame 31R and the fender 13 and extending downward from the position of the front end of the fender 13. According to this configuration, the extension member 35 is located between the position of the bracket 80 on the frame 31R and the fender 13 and extends downward from the position of the front end of the fender 13. Therefore, among the splashes of stones, mud, water, etc. from the rotating rear wheel 7R and the fender 13, the splashes flying in the direction of the inertial measurement unit 42 of the bracket 80 hit the extension member 35 and function as a protective wall, so that the splashes can be reduced from heading toward the inertial measurement unit 42 of the bracket 80. Therefore, the inertial measurement unit 42 can be doubly protected by the extension member 35 and the cover member 90.

[0064] Also, a restricting member 130 is provided for restricting the harness 100, which is attached to the extension member 35 and connected to the inertial measurement unit 42, in the direction of the bracket 80, and the restricting member 130 is provided with a second holding portion 120 for holding the harness 100. According to this configuration, the harness 100 can be guided in the direction of the bracket 80 by the restricting member 130 attached to the extension member 35, which prevents stones, mud, water, and the like splashed by the rear wheel 7R from reaching the bracket 80. Also, the second holding portion 120 of the cover member 90 can hold a portion of the harness 100 close to the connector, and further, the second holding portion 120 of the restricting member 130 can hold a portion of the harness 100 away from the connector, so that the harness 100 can be appropriately held over its longitudinal direction, and the transmission of vibration through the harness 100 to the inertial measurement unit 42 can be further reduced, and erroneous detection in the inertial measurement unit 42 due to vibration of the harness 100 can be reduced.

[0065] Furthermore, the first holding portion 110 and the second holding portion 120 route the harness 100 in the space between the vehicle body 3 and the transmission 5 (drive device). This configuration can prevent the harness 100 from coming into contact with the transmission 5 (drive device) and being damaged, and can prevent vibrations from being transmitted through the harness 100 to the inertial measurement unit 42 due to the contact. This can reduce false detections in the inertial measurement unit 42 due to vibrations of 0. In the above embodiment, the inertial measurement unit 42 has been described as an example of a sensor, but the sensor is not limited to the inertial measurement unit 42. For example, the sensor may be an angular velocity sensor (gyro sensor), an acceleration sensor, or the like, as long as it detects at least one of the acceleration and angular velocity of the vehicle body 3.

[0066] Furthermore, the position of the sensor (inertial measurement unit 42) is not limited to the position in the above embodiment. For example, the sensor (inertial measurement unit 42) is disposed below the frame 31R at a position of the right corner of the vehicle body 3 (a position on the front and right end side of the vehicle body 3), but it may also be disposed at a position of the left corner of the vehicle body 3 (a position on the front and left end side of the vehicle body 3), or at a position midway in the fore-aft direction on the right or left side of the vehicle body 3. In more detail, the bracket 80 to which the sensor (inertial measurement unit 42) is attached may be attached to an attachment position of the frame 31R corresponding to a position other than the end of the vehicle body 3 in the width direction. Also, the bracket 80 may be attached not to a position on the front side of the frame 31R below the frame 31R, but to a position midway in the fore-aft direction of the frame 31R.

[0067] In the above embodiment, the drive device is the prime mover 4 or a device that transmits the power of the prime mover 4, and for example, the drive device is the transmission 5 and the housing is the transmission case 74, but the drive device is not limited to the transmission 5. For example, the drive device may be a clutch and the housing may be the clutch housing 72. Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0068] 1 Tractor (work vehicle) 3. Body 5. Drive mechanism (transmission mechanism) 7 Running gear 7F front wheel 7R rear wheel 8 Connection part (connection device 10 Driver's seat 13. Fender 31R Frame 35 Extension member 42 Inertial Measurement Unit (Sensor) 74 Housing (transmission case) 77 Support member 78 Anti-vibration device 80 Bracket 90 Cover material 91 Side wall 92 Back wall 93 Bottom wall 94 Notch 100 Harness 110 1st holding part 120 Second holding part 130 Regulatory components

Claims

1. The car body and A running device provided on the vehicle body; A drive device that drives the traveling device; a support member provided in a housing of the drive device and supporting the vehicle body via a vibration isolation device; Equipped with The vehicle body includes a frame supporting a driver's seat; a bracket that can be attached to the frame and is disposed at a position that does not contact the support member; a sensor provided on the bracket for detecting at least one of an acceleration and an angular velocity of the vehicle body, The bracket is attached to the frame of the vehicle body of the work vehicle, the frame being vibration-isolated by the vibration-isolation device.

2. the drive device is disposed below the frame at a center in a width direction of the vehicle body and extending in a front-rear direction of the vehicle body, The work vehicle according to claim 1 , wherein the bracket is attached to the frame at a mounting position corresponding to a position spaced apart in the width direction from a center of the vehicle body in the width direction.

3. A coupling device to which a working device can be attached is provided at the rear of the vehicle body, 3. The work vehicle according to claim 1, wherein the bracket is attached to a front side of the frame opposite to a rear side of the frame close to the coupling device, below the frame.

4. The work vehicle according to any one of claims 1 to 3, wherein a cover member that covers the sensor provided on the bracket is attached to the bracket.

5. The cover member is A side wall disposed on an outer side in a width direction of the sensor; a rear wall disposed rearward of the sensor; 5. The work vehicle according to claim 4, further comprising:

6. The work vehicle according to claim 5 , wherein the cover member has a bottom wall disposed below the sensor.

7. The work vehicle according to claim 6 , wherein the cover member is provided with a cutout portion in a shape in which at least a portion of the bottom wall is cut out.

8. The work vehicle according to any one of claims 4 to 7, wherein the cover member includes a first holding portion that holds a harness connected to the sensor.

9. The traveling device is A front wheel disposed at a front portion of the vehicle body; A rear wheel disposed at a rear portion of the vehicle body; having The vehicle body is a fender located rearward of the bracket of the frame and above the rear wheel; an extension member located between the bracket on the frame and the fender and extending downward below a front end of the fender; 9. The work vehicle according to claim 8, further comprising:

10. a restricting member attached to the extension member and configured to restrict a harness connected to the sensor in a direction toward the bracket; The work vehicle according to claim 9 , wherein the restraining member includes a second holding portion that holds the harness.

11. The work vehicle according to claim 10 , wherein the first holding portion and the second holding portion route the harness in a space between the vehicle body and the drive device.

Images