JPS61143225A - Differential gear for automobile - Google Patents

Abstract

PURPOSE:To provide smooth curve travelling by preventing the rotational frequency of an outer wheel from reduction even in the reduction of inner wheel traction. CONSTITUTION:A valve 17 for the left side motor 11 in left turn by handle operation is privoted by the operation of a sessile motor 27 and the operation of a pivotal adjusting unit 19 to afford communication between openings 16, 30. The communicating amount is increased and decreased according to the operational amount of a steering unit so that a planet gear 9 is pivoted to produce the rotational frequency difference between a machine housing 10 and an input shaft 5. Thus, while the rotational frequency of the left side drive wheel 31 is reduced, the right side hydraulic motor 11 is not pivoted, and the input and output shafts 5, 13 are rotated as they are directly connected to each other without reducing the rotational frequency of the left side drive wheel 32.

Description

[Detailed description of the invention] “Industrial Application Field 1 The present invention relates to a differential device for a four-wheel vehicle.

"Conventional technology" Conventionally, power is transmitted to the left and right drive wheels of a four-wheeled vehicle through differential gears, and when driving in a straight line, both left and right driving wheels rotate at the same speed, and when driving on a curve, the rotation of the inner and outer wheels is reduced. It is well known that the rotational speed of the inner wheel increases due to a difference in the number of inner wheels and the phenomenon of floating of the inner wheel and a decrease in friction (reduced traction), which causes the rotational speed of the outer wheel to decrease, causing slippage or smooth curve running.

"The distance point that the invention attempts to solve" The present invention basically solves the problem in Patent No. 7 without using differential gears.
No. 80107 (Japanese Patent Publication No. 49-41240) Utilizing a part of the invention, the present invention attempts to obtain a differential device that can perform smooth curve travel without reducing the rotational speed of the outer ring even when the inner ring traction decreases. be.

Means for Solving Problem No. 1" A four-wheeled vehicle according to the present invention has two drive wing shafts operated by the main drive shaft inserted into a machine casing provided in the vehicle body, and a main gear mounted on the wing shaft inside the machine casing. Providing meshing planetary gears,
A main gear and a planetary gear are built into the south of the machine to form a hydraulic motor driven by the rotation of the main shaft, and the motor is configured to drive the wing shaft on the wheel side, and a flow rate regulating valve is provided on the motor. , the opening/closing of the boat and the adjustment of the flow rate are made up of an automobile differential device that responds to the steering device of the automobile.

``Operation'' Therefore, when the prime mover 37 of the four-wheeled vehicle 1 is started, the main drive shaft is rotated, and the steering wheel is operated to drive the vehicle straight ahead, the hydraulic motor inside the machine casing responds to the steering device and the flow MK valve is activated. When the vehicle operates, the left and right wheel side drive shafts can be rotated to the same rotation speed, allowing the vehicle to travel straight. When the steering gear is moved to the left when making a left turn, the flow control valve in the left side machine casing opens in response to the amount of movement, reducing the rotation speed of the right wing shaft and the rotation speed of the left drive wheel. However, since the adjustment valve on the right wing shaft remains closed, the rotation speed of the right wing shaft does not decrease, and the rotation speed of the right drive wheel does not decrease, and power is transmitted.

"Embodiment" An input shaft 5.5 is connected to the main drive shaft 2 of a four-wheeled vehicle 1 via a bevel gear 3.4. This input shaft 5.5 front wheels only,
It is provided only on the rear wheels or on the front and rear wheels (4@) (Fig. 1).

These input shafts 5.5 are each inserted into a 4* housing 7 provided in the vehicle body 6, and a main gear 8 is provided at the tip of the coaxial shaft 5, and a plurality of planetary gears 9 are meshed with the main gear 8. Both gears8.
9 is built into the hydraulic motor horizontal system 10 to create a hydraulic motor 11.
It forms the The left and right drive blade shafts 14 of the main shaft 2 are connected to the output shaft 13 inserted from the outside of the horizontal box tOU bowl housing 7 while being supported by a bearing 12, and connected to the output shaft 13, the input shaft 5, and the left and right drive blade shafts 14. form 14. A flow rate regulating valve 17 is pressed into contact with the opening 16 of the flow path 15.15 in the horizontal direction 10 (hydraulic, motor 11) with a spring 18, and a single-layer valve I7 is held so as to be rotatable around the input shaft 5. A rotation adjusting device 19 is provided, and the rotation of the boat 17 adjusts the flow M15.
15 can be opened/closed and the flow rate can be adjusted. 5th quotient,
The rotation adjustment device 19 is shown in FIG.
1 are screwed together, a slider 22 is arranged on the inner edge of the same 21, one end of a string or chain 225 that bypasses the guide pulleys 23 and 24 is connected to the slider 22, and the other end is connected to the adjustment valve 17. The protrusion 17 is connected to the protrusion 18 in the outer circumferential direction of the protrusion 17, and the protrusion 17 is pulled in the direction of the arrow a by the spring 19. Then, attach the screw 20 to the outside of the machine casing 7 [
1tll, and a gear 26 at the protruding end is meshed with a gear 28 provided on the output shaft of a Sershin motor 27 provided in the machine casing 7 to form a synchronized adjustment device 19 for the flow rate adjustment valve]7. . The flow path 15.15 of the hydraulic motor 1i is shown in FIG. 7, the opening 16.16 thereof is shown in solid lines in FIG. The opening 30.30 of the regulating valve 17 is indicated by a line.
and the opening 16.16 of the motor 11 are closed in FIG.

It is operated by a signal from a steering amount transmitting device that operates according to the turning angle or sliding amount (of a tie rod, etc.) of the same device (not shown because it is well known) by the steering wheel. As shown, the opening 16.3o is blocked, the rotation of the planetary gear 9 is stopped, and the left and right blade shafts 14 are directly connected to each other by the input shaft 5 and the output shaft 13. When turning left by operating the steering wheel, the valve 17 of the left motor 11 is rotated in the direction indicated by the arrow in FIG. The amount of communication increases or decreases depending on the amount of operation of the steering device, and as a result, the planetary gear 9 rotates, creating a difference in rotation speed between the rotation of the machine 10 and the input shaft 5, and the rotation speed of the left drive @ 31. decreases, but the right hydraulic motor 11
does not rotate and rotates with the input and output shafts 5.13 directly connected, and the rotational speed of the right drive wheel 32 does not decrease. In the case of right-turning, the movement of the left and right driving wheels is completely opposite to that described above.
It can be differentially operated by 2 digits. In addition, the hydraulic pump installed on the Monoke main shaft 2 shown at 33 in Fig. 8, 34 the pipe of the main shaft, 35 in Fig. 9 the hydraulic motor, 36 internal gear, 37 planetary gear, 38 the hydraulic motor horizontal box, 36 ′ is the operating device for the opening/closing and flow rate adjustment valve, the one-sided clutch of the 39-piece horizontal box 38, and the 40-piece clutch 39, and the same latch is in a floating arrangement and the wing shaft 14 is operated.
Free rotation of is performed. FIG. 11 shows the open state of the flow passage opening 36'' of the motor 35 and the valve 36/.

Effect q Since the present invention is constructed as described above, even if the inner wheel rotation speed increases when driving around a curve, the power can be transmitted to the inner and outer wheels without any fear of affecting the outer wheel rotation speed, thereby facilitating smooth curve driving. Safe, you can do this.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an automobile structure using the automobile differential device of the present invention, FIG. 2 is a cutaway plan view of the differential device, and FIG.
The figure is a vertical cross-sectional view taken along line A-A in Figure 2, and Figure 4 is Figure 2B.
- Developed view taken along line B, Figure 5 is an enlarged vertical sectional view of the rotation adjustment device, Figure 6 is a vertical sectional view taken along line C-C in Figure 5, Figure 7 is an explanatory diagram of the hydraulic motor, and Figure 8 is a plan view of another embodiment shown in FIG. 1, FIG. 9 is a cutaway plan view of a hydraulic motor device using a hydraulic pump, FIG. 10 is a vertical sectional view taken along the line D-D in FIG. 1 and 12 are enlarged longitudinal sectional views of the one-way clutch. 1... Four-wheeled vehicle, 2... Drive main shaft, 14... Drive wing shaft, 6... Vehicle body, 7... Machine casing, 8... Main gear, 9... Planetary gear, 11... Hydraulic motor, 17 ...Flow M adjustment valve.

Claims (1)

[Claims] (1) Both drive wing shafts operated by the drive main shaft of a four-wheeled vehicle are inserted into a machine casing provided on the vehicle body, and inside the machine casing, a planetary gear is provided that meshes with the main gear provided on the wing shaft. A hydraulic motor is formed by the rotation of the main shaft by incorporating a main gear and a planetary gear in the box, and the motor is formed to drive the wing shaft on the wheel side, and the motor is provided with a flow rate regulating valve. An automobile differential device that opens and closes valves and adjusts flow rate in response to the automobile's steering system.