JPH01218909A - Car body lift mechanism in vehicle able to change its height - Google Patents

Abstract

PURPOSE:To easily perform adjustment by providing an intermediate shaft between front and rear axles and a car body being offset and parallelly interposed with the front and rear axles and an axle case turnably around fixably to the center of the intermediate shaft further a front and rear wheel normal- reverse rotation-switching mechanism in a front wheel axle-driving mechanism. CONSTITUTION:A front wheel normal-reverse rotation-switching mechanism M5 is mounted interposing between a front wheel differential gear of a front wheel axle driving mechanism M1 and a transmission case 4, enabling a front wheel 7 to switch its direction of rotation equally or reversely to the direction of rotation of a rear wheel. While the mechanism is constituted so as to transmit power of a front wheel drive shaft 33 to a drive pinion 40 and a driven gear 41 via an intermediate shaft 39 through bevel gears 34, 35, king pin 36 and bevel gears 37, 38. A similar intermediate shaft is provided also between a rear axle and a car body. By this constitution, only by switching the front wheel normal-reverse rotation-switching mechanism, car height can be changed with adjustment facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a vehicle body lifting/lowering R problem in a vehicle whose vehicle height can be changed.

(b) Conventional technology Traditionally, in vehicles such as agricultural tractors, an intermediate shaft was provided parallel to the front and rear axles, and power was transmitted to the front and rear axles via the intermediate shaft. Some vehicles were designed to allow the height of the vehicle to be changed by rotating the mounting positions of the front and rear axles.

(c) Problems that the invention seeks to solveHowever,
In order to change the vehicle height, the vehicle height must be jacked up to remove the load on the front and rear axles, and this process is complicated.

Therefore, it was considered that the ground propulsion force of the tractor could be used to change the mounting position of the front and rear axles to the fuselage, but in this case as well, since the left and right front wheels are not equipped with brakes, the position of the rear axle could be changed. The change involves braking one of the left and right rear wheels and driving the other three wheels to change the axle position one step at a time, but the aircraft may tilt or turn sharply during this height change. It has the drawbacks of being dangerous and complicated to operate.

In addition, in a four-wheel drive vehicle in which the front wheel drive is freely available, a center brake is interposed on the wheel side of the front wheel drive disconnection part of the front wheel drive mechanism, and - center brakes are used to control the left and right front wheels. By making it possible to brake simultaneously, the front wheel drive is turned off, and the driving force is transmitted to the left and right rear wheels while the left and right front wheels are braking, thereby applying horizontal drive reaction force and drive torque to the left and right rear axles. By generating a force that attempts to rotate the left and right rear axles in the direction of the propulsion reaction force and drive torque around the intermediate shaft, and simultaneously changing the mounting position of the left and right rear axles relative to the aircraft body. , devises have been made that allow the vehicle height to be changed without the need for tilting the aircraft left or right or making sharp turns.

However, since the vehicle height is changed a lot from front to back,
The vehicle body tilts forward and backward, and the front wheel drive and front and rear brakes must be operated separately, making operation complicated.
If these operations were to be performed using a single lever or the like, there would be a drawback that a complicated and difficult-to-adjust operating mechanism would be required.

(d) Means for solving the problem In this invention, intermediate shafts are interposed between the front and rear axles and the aircraft body, offset from the front and rear axles, and parallel to each other, and the front and rear displacement axes are set around each intermediate shaft. To provide a vehicle body elevating mechanism for a vehicle capable of changing vehicle height, in which the front and rear axle cases supported by the shaft are configured to be rotatable and fixed, and a front wheel forward/reverse switching mechanism is interposed in the front axle drive tank. It is something.

(e) Functions and Effects According to the present invention, the above-mentioned configuration provides the following functions and effects.

If the front wheel forward/reverse switching mechanism is reversed, that is, if the rotation direction of the front wheel is reversed to the rotation direction of the rear wheels, the ground driving forces of the front and rear wheels will be balanced, and the vehicle will remain stationary. Due to the ground drive reaction force to the front and rear wheels during this soil removal and the drive torque of each intermediate axle, the front and rear axle cases are indented around each intermediate axle, and this is done simultaneously on all four wheels to maintain the horizontal posture of the vehicle body. You can change the vehicle height while keeping the vehicle in place.

In addition, the direction of the ground driving force of the front and rear wheels and the direction of the driving torque of the intermediate shaft can be reversed by switching the transmission gear between forward, forward, and reverse, so changes in vehicle body elevation can be made by switching the same gear. Can be done.

Therefore, the only operation required to change the vehicle height is the switching operation of the front wheel forward/reverse shaft mechanism, and the operation mechanism is also simplified.

(v) Embodiment The embodiment of the present invention will be described in detail based on the drawings. In FIG. (2) is installed, and the transmission case (4) is connected via the clutch housing (3) that extends rearward from the prime mover section (2), and the transmission case (4) is installed on the left and right sides of the case (4). rear wheel (
5), a front propeller shaft (6) extends forward from the case (4), and the left and right front wheels are arranged on the left and right sides of the frame (1) via the shaft (6). (7).

In addition, in the figure, (8) is the steering wheel, (9) is the seat, (10
) indicates the operating lever, and (11) indicates the operating pedal.

Figure 2 shows the space between the mission case (4) in the middle of the front axle drive mechanism (M1) and the front propeller shaft (6).
That is, it shows the front wheel forward/reverse switching fiW1 (85) interposed between the front wheel differential and the transmission case (4), and the main shaft (1) mounted inside the mission case (4).
A transfer shaft (13) is mounted parallel to the main shaft (13), and a gear transmission mechanism (14) and a chain transmission mechanism (15) are provided between the main shaft (12) and the shaft (13). (12) Spline fit the gear (16) and sprocket (17) on the same main shaft (12), and connect the gear (18) and sprocket (19) on the transfer shaft (13) side to the same shaft (13). Dogs (20) and (21) formed in wood are rotatably loosely fitted to the gear (18) and sprocket (19), respectively, and a sliding dog (22) splice-fitted to the shaft (13). By selectively engaging the front wheel (7), the direction of rotation of the front wheel (7) interlocked with the transfer shaft (13) can be switched between forward and reverse directions. Therefore, it is possible to switch the rotation direction of the front wheels (7) to the same direction as the rotation direction of the rear wheels (5) or to the opposite direction.

In addition, (23) in the figure is a hawk for operating the sliding dog (22), which is interlocked and connected to the vehicle body lift operation lever (24) that also serves as the four-wheel drive on/off lever near the seat (9). When the lever (24) is operated upward (downward), the rotation is switched to normal (reverse) rotation. Further, the lever (24) is connected to a rear axle case (64) via a wire (25).
It is interlocked and connected with a lever (83) for operating a fixing pin (80).

In the figure, (26) is a needle bearing, (27) (
28) are gears for transmission and PTO, respectively (2)
indicates a locking mechanism.

3 to 6 show the outer end of the front axle housing (31) and the front axle (32), and show the front axle housing (31) and the front axle (32).
1 (33) is transferred to the first and second bevel gears (34).
) (35), king pin C36 with power transmission function)
, a drive pinion (40) that is integrally formed with the intermediate shaft (39), and a spline on the front axle (32). It meshes with the fitted driven gear (41). Therefore, regardless of the steering operation of the front axle (32) about the king pin (36) and the vertical position of the front axle (32) about the intermediate shaft (39), power is transferred to the front axle (32) without any problem. 32).

In order to support the front axle (32), an inner case (42) parallel to the king pin (36) is provided at the outer end of the front axle housing (31), and an outer case (42) is provided in the inner case (42).
3) is rotatably fitted to pivotally support the upper and lower ends of the king pin (36), and the intermediate shaft (39) is fitted on the outer surface of the outer case (43).
) is formed on the inner surface of the front axle case (45) which pivotally supports the front axle (32) and intermediate axle (39). The fitting convex portion (46) is rotatably fitted into the fitting convex portion (46).

In addition, (47) in the figure is a stop bolt whose tip is inserted into the engagement groove (48) provided on the outer peripheral surface of the fitting convex portion (46) to maintain the above-mentioned fitted state. (49) (4
9) is a fixing bolt that is installed symmetrically with respect to the intermediate shaft (39), and the bolt (49049) is inserted through the ears (50) (50) formed on the front axle case (45) and removed. By screwing it onto the case (43), the
The same case (45) is shown in two states: one with the front axle (32) positioned upward as shown in Figure 4, and the other with the front axle (32) positioned downward as shown in Figures 5 and 6. It is configured so that it can be fixed.

In Fig. 6, (S1), (S2), and (S3) are stoppers for regulating the rotation range of the front axle case (45);
1) is the wheel mounting flange, (52) is the same bolt, (
53) is the front axle case, and (54) is the knuckle arm.

Figure 7 shows the final drive device 1 () 12) and the side brake mechanism (M3) provided on the left and right sides of the mission case (4), and shows the final drive device 1 () 12) and the side brake mechanism (M3).
[(82) is a rear wheel drive shaft (55) that protrudes from the side surface of the transmission case (4), a rear drive pinion (59) formed at the outer end of the intermediate shaft (56), and a rear axle (60).
The rear driven gear (61) is spline-fitted to the rear driven gear (61). Therefore, it is possible to transmit power to the rear axle (60) without any problem regardless of the position change of the rear axle (60) centering on the intermediate shaft (56), and it is possible to support the final drive mechanism (M2). In order to A bottom-fitting recess (65) is formed on the inner surface of the rear axle case (64) which pivotally supports the rear axle (60). The rear axle housing (62) is inserted through the rear axle housing (62) and the fixing bolt (66) is screwed onto the case (64) to fix the rotation.

Further, on the inner surface of the rear axle case (64), an intermediate shaft (5
A bearing part (6) is provided with a protruding cylindrical body (67) with the tip thereof provided on the inner circumferential surface of the rear axle housing (62).
68), and a shaft stopper (69) is fitted to the tip of the cylindrical body (67) to prevent the rear axle case (64) from moving outward.

Also, after one of the iF! The drive shaft (55) is provided with a rear Va drive disconnection mechanism (M6), and the mechanism (M6) is
An intermediate shaft (56) is connected to the outer end of the rear wheel drive shaft (55) via a pilot bearing (57) in a butt-like manner,
A rear dog clutch (58) is interposed between each shaft (55H56) to enable connection and disconnection of power transmission by sliding the sliding piece (58a), and a rear drive pinion ( 59) and rear axle (
60) It is engaged with the Noriya Driven Gear (61).

Further, a fixed am
(M4), and the same mechanism (old) has the base outer circumferential surface (70) formed into an outer tapered shape whose diameter is reduced in the direction of the rear axle housing (62), and the tip inner circumferential surface (71). is formed into a tapered inner surface whose diameter is reduced in the direction of the rear axle case (64), and between the base outer circumferential surface (70) and the tip inner circumferential surface (71), the inner and outer circumferential surfaces are formed into inner and outer circumferential surfaces that correspond to the respective tapers described above. Tapered ring (7) formed with tapered surfaces (72) (73)
4) is interposed, and the tapered ring (74) is the eighth
As shown in the figure, three ring pieces (74aH74b) (
74C), each month (74a) (74b) (74
A screw hole (75) is bored in each of the screw holes (75) in c).
) The rear axle case (64) and the housing (62) are fixed or released by tightening or loosening a fixing bolt (76) screwed into the rear axle case (64).

In the figure, (76) indicates a fixing bolt, (77) a retaining ring to prevent falling off, (120) indicates a rear wheel, and (121) indicates a lightning hole drilled in the wheel (120).

In addition, each ring piece (74a) of the tapered ring (74)
(74b) In the predetermined position of (74C), the first
As shown in Figure 1, a positioning hole (78) is drilled, and a stud (79) implanted in the rear axle case (64) is fitted into the circumference (78). A tapered hole j78a) is formed on the rear axle housing (62) side to enable insertion and removal of the tip of a fixing pin (80), which will be described next.

The fixing pin (80) is slidably mounted on the upper part of the rear axle housing (62) and biased by a spring (81) in the direction of the taper ring (74). The fixed operation shaft (8
2) and the same pin (80) by rotation of the same lever (83).
into the tapered hole (78a) and remove it from the rear axle case (
64) is locked or unlocked, and is operated by the vehicle body raising/lowering operating lever (24).

Note that (84) in FIG. 8 is a recessed portion.

As shown in FIG. 7, the side brake mechanism (M3) is provided on the rear Va drive shaft (55) on the side where the rear wheel drive disconnection mechanism (M6) is not provided.
) is the transmission case (4) of the rear axle housing (62).
) is provided inside the mounting base for the rear wheel drive shaft (
A plurality of brake discs (55) spline-fitted to the
The first
As shown in Figure 2, inside the handbrake operating shaft (88)
Cam (89) and ball (90) formed at fliJ end
When the pressure plate (87) operates, the brake disc (85) and brake pad (86) are pressed to obtain a braking action.

In Figure 7, (S4) and (S5) are the rear axle case (6
4) Stopper for regulating the rotation range of (91)
indicates a differential, and (92) does not indicate a differential lock.

The embodiment of the present invention is configured as described above, and when changing the vehicle height, the fixing bolt (49) of the front axle case (45) is
), by removing the fixing bolt (66) of the rear axle case (64) and loosening the fixing bolt (76) of the fixing mechanism (M4), the front and rear axle cases (45) (64) can be rotated, and the speed can be changed. When the gear is put into forward-speed (reverse) and the vehicle body lifting/lowering operation lever (24) is operated downward, that is, to the reverse position, the fixing pin (80) of the fixing Rm (84) comes out.

When the clutch is engaged, driving force is generated in the rear wheel (5) in the forward (backward) direction and in the front wheel (7) in the backward (forward) direction, and both driving forces are balanced and the vehicle body The front axle case (31) (64) is rotated by this driving reaction force and the torque of the intermediate shaft (39) (56) which is interlocked with the front and rear axles (32) (60) through gears. to raise (lower) the body of the tractor (A).

When the lifting (lowering) operation of the car body is completed, the car body lifting/lowering operation lever (24) is operated upward to fix the fixing pin (8 (
)) to lock the fixing mechanism (M4) and tighten the fixing bolts (49), (66), and (76) that were previously removed or loosened to complete the vehicle height change work.

As mentioned above, since the vehicle height of the tractor (8) is changed simultaneously on all four wheels, the vehicle height can be changed safely while maintaining the horizontal position, and the lever operation required to change the vehicle height. Also, the operation is extremely simple, as it is only necessary to operate the vehicle body elevation control lever (24) and the gear shift lever.

Note that FIGS. 3 and 4 are a front sectional view and a side view when the front part of the vehicle body is set to a low vehicle height, and FIGS. 5 and 6 are a sectional view and a side view when the vehicle height is set to a high height. 13 and 14 are a side view and a front view when the vehicle height of the rear part of the aircraft is low, and FIGS. 15 and 16 are a side view and a front view when the vehicle height is high. It is a front view.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a tractor having the 8i structure of the present invention. FIG. 2 is a longitudinal sectional view of the front axle drive mechanism. 3 and 4 are a cross-sectional front view and a side view of the outer end of the front axle (when the vehicle height is low). Figures 5 and 6 show l'17 outside the front axle! Cross-sectional front view and side view of the I end (at vehicle height). FIG. 7 is a cross-sectional front view around the rear axle and rear wheel drive shaft. FIG. 8 is a front view of the tapered ring. 9, 10, and 11 are shown in FIG. 8 II. nn, mm sectional view. FIG. 12 is a sectional view around the handbrake operating shaft. 13 to 16 are diagrams showing the operating state of the rear axle case. (Old): Front wheel drive n-ellipse (85): Front wheel forward/reverse switching V1 structure (32) (60): Front and rear axles (39) (56): Intermediate axle (45) (64): Front and rear axle case

Claims (1)

[Claims] 1) An intermediate shaft (
39) (56) were interposed parallel to and offset from the front and rear axles (32) (60), and the front and rear axles (32) (60) were pivotally supported around each intermediate shaft (39) (56). In a vehicle capable of changing vehicle height, in which the front and rear axle cases (45) and (64) are configured to be rotatable and fixed, and a front wheel forward/reverse switching mechanism (M5) is interposed in the front axle drive mechanism (M1). Vehicle lifting mechanism.