JPH069871Y2 - Fixed pin operation mechanism for vehicles with adjustable vehicle height - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to a fixed pin operating mechanism in a vehicle whose vehicle height can be changed.

(B) Conventional Technology Conventionally, in a vehicle, for example, an agricultural tractor, an intermediate shaft is provided parallel to and above the front and rear axles, and power is transmitted to the front and rear axles through the intermediate shafts. There is a structure in which the vehicle height can be changed by rotating the mounting positions of the front and rear axles around the center.

(C) Problems to be solved by the invention However, in order to change the vehicle height, the vehicle height cannot be changed without jacking up the vehicle body and removing the load on the front and rear axles. There was a drawback that the work was complicated.

Therefore, it was considered to change the mounting position of the front and rear axles to the airframe by using the ground propulsion force of the tractor.However, in this case as well, the fixation of the front and rear axle shaft support positions must be released. Since the vehicle height cannot be changed, the vehicle body becomes unstable before and after the vehicle height changing operation, and particularly when the rear portion having a large weight becomes unstable, there is a drawback that it is very dangerous.

(D) Means for Solving Problems In the present invention, a rear axle housing is fixed to the machine body, a rear wheel drive shaft is pivotally supported by the rear axle housing, and a rear axle case is attached to the rear axle housing. By rotatably supporting the drive shaft as a center, and by pivotally supporting the rear axle that is interlockingly connected to the rear axle case in parallel with the rear wheel drive shaft, and rotating the rear axle case with respect to the rear axle housing. In a vehicle in which the rear axle can be moved in parallel to the machine body to change the vehicle height at the rear of the machine body, the fixing pin is swingably inserted into the rear axle housing, and the tip of the fixing pin is fixed to the rear axle case. The rear axle case can be locked or unlocked with respect to the rear axle housing, and is connected to the transmission case and the front wheel center brake through a shift mechanism. car The fixed pin is interlockingly connected to the vehicle body lifting operation lever that activates and deactivates the wheel drive and activates the center brake, and by operating the vehicle body lifting operation lever, only the rear wheels are driven and the front wheel center brake is applied. In the operated state, the fixing pin is pulled out from the member fixed to the rear axle case, the rotation of the rear axle case is unlocked, and the rear wheel is driven by the driving torque applied to the rear wheel, which is blocked by the front wheel center brake. It is possible to change the vehicle height of the rear part of the fuselage by rotating the axle case, and in addition to the above state, the fixing pin is inserted into the member fixed to the rear axle case to lock the rotation of the rear axle case. It is intended to provide a fixed pin operation mechanism in a vehicle whose vehicle height can be changed.

(E) Action / Effect According to the present invention, the fixing pin for preventing the rotation of the rear axle case supporting the rear axle can be inserted / removed by operating the vehicle body raising / lowering operation lever of the driving section, Immediately before or after the rear vehicle height changing operation, the fixing pin can be inserted / removed, that is, the rear axle shaft support position can be unlocked and locked. Since it can be performed by the lever that operates the brake, there is an effect that safety when changing the vehicle height can be enhanced and the operation can be simplified.

(F) Embodiments An embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, (A) shows an agricultural tractor as a vehicle, and a prime mover (2) is provided on an upper surface of a frame (1). ) Is mounted, and the transmission case (4) is connected via the clutch housing (3) extending rearward from the prime mover part (2), and the left and right rears are arranged on the left and right sides of the case (4). While driving the wheels (5), the front propeller shaft (6) is extended forward from the case (4), and the front left and right sides are arranged on the left and right sides of the frame (1) through the shaft (6). It is configured to drive the wheels (7).

In the figure, (8) is a handle, (9) is a seat, (10) is an operating lever, and (11) is an operating pedal.

Figure 2 shows the mission case in the middle of the front axle drive mechanism (M1).
The front dog clutch (12) and the center brake (13) provided between the front propeller shaft (6) and the front propeller shaft (6), that is, between the front wheel differential and the transmission case (4), are shown. (12) is a transmission gear (15) meshed with a gear (14) formed on a main shaft mounted inside the mission case (4), and the transfer gear (15) is attached to the front wall (16) of the mission case (4).
The transfer shaft (17), which is rotatably supported, and is loosely fitted to the side of the gear (15).
2) One of the meshing parts (18) is formed and the shaft (1
The sliding meshing part (19) is fitted onto (7) and the front dog clutch
It constitutes (12).

Reference numeral (20) denotes a lock ball, and (21) denotes a sleeve having splines formed on the inner and outer peripheral surfaces thereof interposed between the shaft (17) and the sliding meshing portion (19).

The center brake (13) is located on the front wall of the mission case (4).
Insert the transfer shaft (17) through the center brake case (22) provided in (16), connect the front propeller shaft (6) to the outer end of the shaft (17), and then in the case (22). Multiple friction plates (23) on the same shaft (17)
Is fitted to the case (22), and the fixed plate (24) which is not rotatable but axially slidable is attached to the friction plate.
(23) are arranged alternately, and the pressure plate (25) presses the friction plate (23) and the fixed plate (24) so that the transfer shaft (17) is braked. .

In the figure, (26) is a back plate fixed to the center brake case (22).
2) When the pressure plate (25) is rotated around the transfer shaft (17) by the cam (28) formed on the inner end of the brake shaft (27), the space between the plates (25) and (26) The pressure plate (25) operates so that the friction plate (23) and the fixed plate (24) are pressed against each other by the ball (29) interposed in the pressure plate (25). Incidentally, (30) is a return spring.

3 to 6 show the outer end portion of the front axle housing (31) and the front axle (32), and the power from the front wheel drive shaft (33) is supplied to the first and second bevel gears (34). ) (35), king pin (36) with power transmission function, third and fourth bevel gears (37) (38)
The drive pinion (40) integrally formed with the intermediate shaft (39) is engaged with the driven gear (41) spline-fitted to the front axle (32). . Therefore, regardless of the steering operation of the front axle (32) around the kingpin (36) and the vertical displacement of the front axle (32) around the intermediate shaft (39), the power is transmitted to the front axle without any trouble. Can be communicated.

To support such front axle (32), front axle housing (3
Provide the inner case (42) parallel to the intermediate shaft (39) at the outer end of 1),
The outer case (43) is rotatably fitted to the inner case (42) to pivotally support the upper and lower ends of the king pin (36), and the intermediate shaft (39) is centered on the outer surface of the outer case (43). A circular fitting recess (44) is formed, and the fitting protrusion formed on the inner surface of the front axle case (45) that supports the front axle (32) and the intermediate shaft (39) in the recess (44). (46) is rotatably fitted.

Further, in the figure (47) is a stop bolt for fitting the tip into the engaging groove (48) provided around the outer peripheral surface of the fitting convex portion (46) to maintain the fitted state, (49) (49) are fixing bolts installed symmetrically around the intermediate shaft (39).
The ears (50) and (50) formed on the front axle case (45) are inserted through the (49) and (49) and are screwed to the outer case (43), whereby the third case is obtained.
The case (45) shown in FIG. 4 and FIG. 4 is located in the upper position of the front axle (32) and in the lower position of the front wheel (32) shown in FIG. 5 and FIG. ) Can be fixed.

In the figure, (S1) (S2) (S3) are stoppers for restricting the rotation range of the front axle case (45), (51) is the wheel mounting flange,
(52) is the same bolt, (53) is the front wheel, and (54) is the knuckle arm.

FIG. 7 shows the final drive mechanism (M2) and the side brake mechanism (M3) provided on the left and right side surfaces of the mission case (4). The final drive mechanism (M2) is a side surface of the mission case (4). Rear driven gear (61) with the rear wheel drive shaft (55) protruding to the rear axle (60) and the rear drive pinion (59) formed at the outer end of the coaxial shaft (55).
Is meshed with. Therefore, it is possible to transmit power to the rear axle (60) without any trouble regardless of the position change of the rear axle (60) around the intermediate shaft (56), and to support the final drive mechanism (M2). For the mission case
Rear axle housings (62) enclosing the intermediate shaft (56) are projected on the left and right side surfaces of (4), and coaxial (5
Circular fitting protrusion (63) with 6) as the center
(63) is rotatably fitted with a fitting recess (65) formed on the inner surface of the rear axle support case (64) that supports the rear axle (60), and the rear axle housing (62) is inserted. The rotation is fixed by a fixing bolt (66) screwed to the case (64).

Further, on the inner side surface of the rear axle case (64), a cylindrical body (67) centering on the intermediate shaft (56) is projectingly provided, and its tip portion is provided on the inner peripheral surface of the rear axle housing (62). The shaft is supported by the bearing (68) provided, and the retaining ring (69) for the shaft is fitted to the tip of the tubular body (67) to prevent the rear axle case (64) from moving outward. .

In addition, one rear wheel drive shaft (55) has a rear wheel drive connection / disconnection mechanism (M6).
The mechanism (M6) is configured such that the intermediate shaft (56) is continuously connected to the outer end of the rear wheel drive shaft (55) through the pilot bearing (57) in a butt shape. ) (56) with a rear dog clutch (58) interposed between them to allow sliding power transmission and disconnection by sliding the sliding piece (58a), and the rear drive pinion (59) at the outer end of the intermediate shaft (56). ) Forming the rear axle (60)
It is meshed with the rear driven gear (61).

A fixing mechanism (M4) is provided between the outer peripheral surface (70) of the base of the tubular body (67) and the inner peripheral surface (71) of the distal end of the fitting projection (63). (M4) is formed by tapering the outer peripheral surface (70) of the base portion in the direction of the rear axle housing (62) to form a tapered outer surface, and the inner peripheral surface (71) of the tip portion in the rear axle case (64) direction. Inner surface is tapered, outer peripheral surface of base (70) and inner peripheral surface of tip (71)
The inner and outer peripheral surfaces are provided with a taper ring (74) having inner and outer tapered surfaces (72) and (73) formed between them and the taper ring (74) shown in FIG. As shown in, each ring (74a) (74b) (74c) is divided into three ring pieces (74a) (74b) (74c).
a) (74b) and (74c) are provided with screw holes (75), respectively.
The rear axle case by tightening and loosening the fixing bolt (76) screwed to (5)
The (64) and the housing (62) are fixed or released.

In the figure, (77) is a retaining ring for preventing the fixing bolt (76) from falling off, (S4) (S
5) is a stopper, and (120) and (121) are a rear wheel and a lightning wheel drilled in the wheel.

In addition, each ring piece (74a) (74b) (74) of the taper ring (74)
A positioning hole (78) is drilled at the specified position in (c), and the hole (7
The stud (79) built in the rear axle case (64) is fitted into the rear axle case (64), and the rear axle housing (62) side of the same hole (78) is formed into a taper hole (78a). The fixing pin (80) tip can be inserted and removed.

The fixing pin (80) is located on top of the rear axle housing (62).
(80) is slidably installed and urged by a spring (81) in the direction of the taper ring (74), and a fixed operation shaft (82) and a fixed operation shaft (82) protruding through the rear axle housing (62) to the outside are inserted. By rotating the lever (83), the pin (80) is inserted into and removed from the tapered hole (78a) to lock or unlock the rotation of the rear axle case (64).

It should be noted that reference numeral (84) in FIG. 8 is a recessed portion.

The side brake mechanism (M3) is a rear wheel drive intermittent mechanism (M3).
6) is provided on the rear wheel drive shaft (55) on the side not provided, and the mechanism (M3) is installed inside the base of the rear axle housing (62) that is attached to the mission case (4). And has a structure similar to that of the center brake (13) described above, and includes a plurality of brake discs spline-fitted to the rear wheel drive shaft (55).
(85) and the brake pad (86) provided on the inner side surface of the housing (62) so as not to rotate are layered alternately, and as shown in FIG. 12, at the inner end of the side brake operation shaft (88). The operation of the formed cam (89) and ball (90) causes the pressure plate (87) to disengage the brake disc (85) and brake pad (86).
The pressure is applied to and to obtain a braking action.

In FIG. 7, (S4) and (S5) are stoppers for restricting the rotation range of the rear axle case (64), (91) is a diff, and (92) is a diff lock.

Then, the sliding engagement portion (1) of the front drag clutch (12) is
9), center brake (13) brake shaft (27), rear dog clutch (58) sliding piece (58a),
Side brake operating shaft (88) of the side brake mechanism (M3),
The fixing pin (80) of the fixing mechanism (M4) is
Operated by 5).

As shown in FIGS. 13 and 14, the operation transmission mechanism (M5) has a brake lever (93) fixedly attached to the outer end of the brake shaft (27) of the center brake (13) at the upper end thereof.
Connect the wire (94), the second wire (95) at the lower end, and the third wire (96) between the lower end and the brake shaft (27), and as shown in FIG.
Attach the rear clutch lever (98) to the outer end of the hawk shaft (58c) that is connected to the hawk (58b) for sliding the sliding piece (58a) of (58), and attach the rear clutch lever (98). The fourth wire (97) is connected to the tip, the other end of the first wire (94) is connected to the tip of the fixing operation lever (83) of the fixing mechanism (M4), and the side brake operation shown in FIG. 12 is performed. The rear end of the brake rod (102) is connected to the side brake lever (101) connected to the shaft (88).

The terminals of the second, third and fourth wires (95) (96) (97) and the brake rod (102) are a shift mechanism which is interlocked with a vehicle body raising / lowering operation lever (103) provided near the seat (9). It is linked to (M7).

As shown in FIGS. 15 and 16, the shift mechanism (M7) is provided with a lateral operation shaft (104) projecting from the machine body, and a coaxial (104) end provided with a forked portion (105). A vehicle body raising / lowering operation lever (103) is connected in a diagonally forward and upward direction and rotatably forward and backward and left and right via a lever support shaft (106) that passes through the bifurcated portion (105).
An engaging body (107) protruding from the lower end of 03) is attached to the base ends of the first and second shift arms (109) (110) loosely fitted to the shift shaft (108) protruding laterally from the machine body. Formed bifurcated part (109a) (1
10a) and either of the forked portions (111) fixed to the coaxial (108) are engaged.

The first shift arm (109) extends downward from the forked portion (109a) and has a third wire (96) connected to the lower end thereof, and the second shift arm (110) is formed in a substantially triangular shape. And extends in the diagonally rearward and downward direction. The fourth wire (97) is connected to the diagonally rearward and downwardly downward apex of the shift shaft (108), and the coaxial (10
The front end of the brake rod (102) is connected to the apex of 8) as follows.

Coil spring (112) at the front end of the brake rod (102)
A shock absorber (113) using the
It is connected to the apex through a long hole (115) formed in the front end of the substrate (114) of 3), and a four-wheel drive on / off lever (116) is connected to the inner end of the shift shaft (108). The lever (116) is interlocked with the sliding meshing portion (19) of the front dog clutch (12).

In the figure, (117) is a diff lock pedal.

Further, the vehicle body raising / lowering operation lever (103) is inserted through a guide hole (119) formed in a guide plate (118) shown in FIG.
In the guide hole (119), move the lever (103) to P1 to P
By operating each position of No. 6, each part is operated by the shift mechanism (M7) and the operation transmission mechanism (M5) of the above-mentioned structure as shown in a separate table.

Note that P7 and P8 are lock positions of the lever (103) at positions P4 and P6.

The embodiment of the present invention is configured as described above, and when changing the vehicle height, remove the fixing bolt (49) of the front axle case (45) and the fixing bolt (66) of the rear axle case (64), Fixing mechanism (M4)
Loosen the fixing bolts (76) on the front and rear axle cases.
(45) and (64) are turnable, and then the vehicle body lifting operation lever (1
03) to P4 or P7, and move the tractor (A) forward (rear).
When the vehicle is advanced, the rear wheel (5) is prevented from moving forward and backward by the side brake mechanism (M3), so the torque of the intermediate shaft (39) and the reaction force of the front wheel (7) to the ground drive the front axle (32). The front axle case (45) pivotally supporting the shaft rotates to raise (lower) the front part of the vehicle body of the tractor (A). During the above operation, the rear axle case
The rotation of the (64) is locked by the fixing pin (80).

Also, the rotation range of the front axle case (31) is limited to the stopper (S1) (S
2) It is regulated by (S3), and the vehicle height change is completed at the front of the machine by screwing and fastening the fixing bolts (49) at both ends of the rotation of the case (31).

3 and 4 are a front sectional view and a side view when the vehicle body front portion is at a low vehicle height, and FIGS. 5 and 6 are a sectional view and a side view when the vehicle body height is at a high vehicle height. Is.

Further, when the vehicle body raising / lowering operation lever (103) is positioned at P6 or P8 and the tractor (A) is moved forward (rearward), the front wheel (7) is prevented from moving forward and backward by the center brake (13). , The torque of the intermediate shaft (56) connected to the rear wheel drive shaft (55),
And the rear axle case (64) due to the ground reaction force of the rear wheels (5)
Is rotated to raise (lower) the rear part of the body of the tractor (A).

The rotation range of the rear axle case (64) is limited to the stopper (S4).
It is regulated by (S5), and the vehicle height change at the rear of the machine is completed by screwing and tightening the fixing bolts (66) and (76) at both ends of the rotation of the case (64).

18 and 19 are a side view and a front view in the case where the rear part of the machine body has a low vehicle height, and FIGS. 20 and 21 show
It is a side view and a front view at the time of making a high vehicle height.

A vehicle body lifting operation lever provided near the seat (9) as described above
The fixing pin (80) is fixed to the rear axle case (64) by the (103) so that it cannot rotate.
Since it can be inserted and removed freely in a), it is possible to perform the vehicle height changing operation, that is, removing the pin (80) immediately before the forward and backward movement of the aircraft and inserting it immediately after the four wheel drive is turned on and off. Therefore, the operation can be simplified and the safety can be improved.

[Brief description of drawings]

FIG. 1 is an overall side view of a tractor having the mechanism of the present invention. FIG. 2 is a vertical cross-sectional view of the front axle drive mechanism. 3 and 4 are a sectional front view and a side view of the front axle outer end portion (when the vehicle body is at a low vehicle height). FIG. 5 and FIG. 6 are a sectional front view and a side view of the front axle outer end portion (when the vehicle body height is high). FIG. 7 is a sectional front view around the rear axle and the rear wheel drive shaft. FIG. 8 is a front view of the taper ring. FIGS. 9, 10, and 11 show FIGS.
I, III-III sectional view. FIG. 12 is a sectional view around the side brake operating shaft. FIG. 13 is a front view of the front axle drive mechanism. FIG. 14 is a side view of the operation transmission mechanism. FIG. 15 is a plan view of the same. FIG. 16 is a sectional view taken along the line IV-IV in FIG. 14. FIG. 17 is a front view of the guide plate. 18 to 21 are operation state diagrams of the rear axle case. (4) …… Mission case (5) …… Rear wheel (7) …… Front wheel (13) …… Center brake (55) …… Rear wheel drive axle (60) …… Rear axle (62) …… Rear Axle housing (64) …… Rear axle case (80) …… Fixing pin (103) …… Body raising / lowering operation lever (M7) …… Shift mechanism

Claims (1)

[Scope of utility model registration request] 1. A rear axle housing (62) is fixedly mounted on the body,
The rear axle housing (62) supports the rear wheel drive shaft (55), and the rear axle housing (62) attaches the rear axle case (64) to the rear wheel drive shaft (5).
5) rotatably around the center, and the rear axle case (64) is rotatably supported by the rear axle (60) connected in parallel with the rear wheel drive shaft (55). ) For rear axle case
In a vehicle in which the rear axle (60) can be translated in relation to the machine body by rotating (64) to change the vehicle height at the rear of the machine body, the fixing pin (80) is attached to the rear axle housing (62). The rear end of the rear axle case (64) is pivotally inserted, and the tip of the fixing pin (80) is inserted into and removed from a member fixed to the rear axle case (64). The movement can be locked or unlocked, and the transmission case (4) and the center brake (13) of the front wheel (7) are interlockingly connected through a shift mechanism (M7) to enable / disable the front wheel drive and the center. On the vehicle body raising / lowering lever (103) that operates the brake (13), attach the fixing pin
(80) are interlockingly connected, and by operating the vehicle body raising / lowering operation lever (103), only the rear wheel (5) is driven, and in the state where the front wheel center brake is activated, the fixing pin (80) is Pull out from the member fixed to the rear axle case (64), unlock the rotation of the rear axle case (64), and use the drive torque applied to the rear wheel (5) whose forward and backward movement is blocked by the front wheel center brake. It is possible to change the vehicle height of the rear part of the fuselage by rotating the axle case (64), and in other cases than the above, the fixing pin (80) is inserted into the member fixed to the rear axle case (64). A fixed pin operating mechanism for a vehicle whose vehicle height can be changed and which is configured to lock the rotation of (64).