JPH0730129U - Parking brake system for motor vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] In a power vehicle equipped with a crawler traveling device, a multi-wheel traveling device, etc., a simple parking device provides strong braking force to the left and right traveling devices to ensure safe driving even on sloped roads. Allow parking. [Constitution] In a power vehicle provided with a left gear transmission system 86 and a right gear transmission system 87, the left gear transmission system 86 and the right gear transmission system 87 are interlocked in such a relationship that the left and right traveling devices 13 and 13 are traveling in opposite directions. The parking gear 52 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a parking brake device in a power vehicle including a crawler traveling device and a multi-wheel traveling device having three or more wheels on one side.

[0002]

[Prior art]

 In the crawler traveling device and the multi-wheel traveling device, a power transmission system is separately provided on the left and right sides so that the left and right crawlers and wheels can be individually stopped. Such a parking brake device for a traveling device having separate left and right power transmission systems generally has a configuration in which left and right power transmission systems are provided with separate brake mechanisms for rotation control.

[0003]

[Problems to be solved by the device]

 In the conventional configuration in which the left and right power transmission systems are braked separately, the left and right braking mechanisms must be made to work equally, which complicates the configuration. Therefore, an object of the present invention is to provide a parking brake device capable of reliably braking the left and right power transmission systems with a relatively simple structure.

[0004]

[Means for Solving the Problems]

 In a power vehicle provided with a left gear transmission system 86 that drives the left traveling device 13 and a right gear transmission system 87 that drives the right traveling device 13, the traveling directions of the left traveling device 13 and the right traveling device 13 are opposite to each other. In relation to this, the parking gear 52 that connects the left gear transmission system 86 and the right gear transmission system 87 is provided to form a parking brake device for a power vehicle. Further, the parking lever 19 is provided so that the parking gear 52 can be operated when both the steering gearshift lever 7 of the left traveling device 13 and the steering gearshift lever 7 of the right traveling device 13 are in the stopped position.

[0005]

[Operation and effect of the device]

 The left and right traveling devices 13, 13 are driven by a left gear transmission system 86 and a right gear transmission system 87, which are connected to a drive source, respectively. When a clutch is provided between the two gear transmission systems 86, 87 and the drive source, the left and right traveling devices 13, 13 must be braked when the clutch is disengaged. Even when both gear transmission systems 86 and 87 are connected to the hydraulic drive source without a clutch, the left and right traveling devices 13 and 13 are similarly braked when strong braking force is required such as when stopping on a slope. Must. In the present invention, when braking, the left and right gear transmission systems 86, 87 are engaged by the parking gear 52 so that the left and right traveling devices 13, 13 rotate in reverse. It is simpler than the separate braking structure and does not require a mechanism for adjusting the left and right braking forces to balance.

Since the left-side gear transmission system 86 and the right-side gear transmission 87 rotate separately, it is necessary to mesh the parking gear 52 when both stop. Since the parking lever 19 can be operated when the transmission systems 86 and 87 are stopped, both gear transmission systems 86 and 87 can be safely connected by the parking gear 52 and the parking state is established.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. A loading platform 14 is mounted on the front side of a chassis 5 equipped with a traveling device composed of crawlers 13, and a prime mover 2 is mounted on the rear side thereof. The periphery of the prime mover 2 is surrounded by a pipe-shaped prime mover frame 4, and the top and left and right sides of the prime mover frame 4 are covered with plates to form a prime mover frame 3. The driving frame 4 has its rear lower end pivotally supported by a horizontal shaft 6 provided on a chassis 5, and its left and right upper front ends are engaged with pins 17 by hooks 16 provided on the upper part of a pillar 15 standing upright from the chassis 5. Fixed. The pin 17 is disengaged from the hook 16 by rotating the lever 18, and is biased toward the engaging side by a spring.

On the upper part of the driving frame frame 4, steering operation tools 9 such as steering gearshift levers 7, 7 arranged side by side and a traveling clutch lever 8 are provided upright. A parking brake lever 19 is provided on the rear side of the drive frame 4. On the rear side of the prime mover 2, a hydraulic pump 21 for damping the loading platform 14 is attached to a support frame 20 fixed to the prime mover 2, and a prime mover 22 attached to an output shaft of the prime mover 2 and an input shaft of the pump 21. The driving force is transmitted by the belt 24 to the pulley 23 attached to the.

A hydraulic transmission (HST) 25 is attached to the left and right sides of the transmission case 10 attached to the lower part of the chassis 5, and a hydraulic transmission (HST) 25 is mounted between the pulley 26 attached to the input shaft of the hydraulic transmission 25 and the relay pulley 27. A belt 28 is wound around the belt 28, and a belt 29 is wound between the driving pulley 22 and the relay pulley 27 to transmit power. Numeral 30 is a clutch pulley for connecting and disconnecting the power by tensioning or loosening the belt 29, which is connected to the traveling clutch lever 8 by a wire.

As shown in FIG. 2, the steering gearshift levers 7, 7 and the gearshift lever 31 of the hydraulic transmission 25 are connected by a link mechanism 11. The steering gearshift levers 7, 7 are pivotally supported by left and right mounting cylinders 33, 33 externally fitted on a horizontal shaft 32 mounted horizontally on the driving frame 4 so as to be rotatable left and right, and are formed in the driving frame 3 in the front-back direction. The guide grooves 34, 34 are projected upward. The ends of the arms 35, 35 protruding from the left and right mounting cylinders 33, 33 are connected to the ends of the protruding arms 38, 38 of the left and right relay cylinders 37, 37 pivotally supported by a horizontal shaft 36 pivotally supported on the chassis 5 side. They are connected by rods 39, 39.

An engaging piece 40 is projected from one connecting rod 39 toward the other connecting rod 39, and the engaging piece 40 is inserted from the other connecting rod 39 with a vertical gap. The interlocking portion 85 is configured by projecting the pieces 41 and 42. 43 and 43 are adjusting nuts for adjusting the length of the connecting rod 39. The left and right steering speed change levers 7, 7 are arranged such that when one of the steering speed change levers 7 is rotated by the engaging pieces 40, 41, 42 to a certain extent or more, the other steering speed change lever 7 is also rotated in the same direction. Become.

The position of the connecting pivot shaft 12 portion with the bent protruding arm 38 at the lower end of the connecting rod 39 is such that when the steering speed change levers 7, 7 are in the neutral position, the axial direction thereof is the drive frame frame 4. The connecting link 11 of the steering gearshift levers 7 and 7 and the gearshift lever 31 of the hydraulic transmission 25 moves even when the driving frame frame 4 is rotated rearward, which coincides with the axial position of the horizontal shaft 6 which pivotally supports. Instead, the driving frame 2 can be largely rotated rearward to open the periphery of the driving machine 2.

Another arm 44, 44 is projected downward from the relay cylinder 37, 37, and the transmission lever 31 of the hydraulic transmission 25 provided on the tip ends of the arm 44, 44 and the left and right side surfaces of the mission case 10 is connected to the rod. 45 and 45 are connected. Further, the left and right relay cylinders 37, 37 are provided with pins 46, 47 projecting parallel to the cylinder center direction so that the left and right steering speed change levers 7, 7 are not in the front-rear intermediate position and the traveling device is not driven. When the position is reached, the pins 46 and 47 are vertically aligned and the parking brake operating device 48 described later is rotatable.

The parking brake actuator 48 is rotatably supported on a pivot shaft 49 provided on the chassis 5 in a direction orthogonal to the axial direction of the relay cylinders 37, 37. A restricting plate 51 having a U-shaped groove 50 passing therethrough and an operating plate 54 for holding a shift lever 53 for shifting a parking gear 52 in the mission case 10 are provided projectingly, and a pin 55 fixed to the restricting plate 51 is provided. The parking lever 19 is connected by a wire 56. Therefore, the parking gear 52 can be moved to the parking position by rotating the parking lever 19 only when the left and right steering speed change levers 7, 7 are in the neutral position and the operating tool 48 is rotated. The ya 52 can be shifted.

The internal structure of the mission case 10 is configured as shown in the transmission mechanism diagram of FIG. A small gear 58 is fixed to the input shaft 57 in the transmission case 10 connected to the left hydraulic transmission 25, and the small gear 58 is meshed with the large gear 60 fixed to the first intermediate shaft 59 to engage the first intermediate shaft. 59 is rotated to mesh the small gear 61 fixed to the first intermediate shaft 59 with the large gear 63 fixed to the second intermediate shaft 62 to rotate the second intermediate shaft 62. The left gear transmission system 86 is configured to drive the left crawler 13 by rotating the left wheel sprocket 67 by meshing the small gear 64 fixed to the wheel gear 66 of the left wheel shaft 65.

A small gear 69 is fixed to the input shaft 68 connected to the right hydraulic transmission 25, and the parking gear 52 is slid by spline fitting and fixed to the input shaft 57 of the left hydraulic transmission 25. It can be engaged with and disengaged from the stop gear 80. When the parking gear 52 meshes with the stop gear 80, the left gear transmission system and the right gear transmission system form a closed loop, and the left and right crawlers are connected in a reverse rotation relationship. The small gear 69 meshes with the large gear portion 71 of the large and small gear 70 that is rotatably fitted to the first intermediate shaft 59, and the small gear portion 72 of this large and small gear 70 is rotatably fitted to the second intermediate shaft 62. The small gear portion 75 of the small gear 73 meshes with the large gear portion 74 of the large gear 73, and the small gear portion 75 of the large gear 73 meshes with the wheel gear 77 of the right wheel shaft 76 to rotate the right wheel sprocket 78 and drive the right crawler 13 to drive the right gear. The transmission system 87 is configured.

[Brief description of drawings]

FIG. 1 is a partial transmission mechanism diagram.

FIG. 2 is a partially enlarged perspective view.

FIG. 3 is a partially enlarged perspective view.

FIG. 4 is a partial side view.

[Explanation of symbols]

 7 Steering speed change lever 13 Traveling device 19 Parking lever 52 Parking gear 86 Left gear transmission system 87 Right gear transmission system

Claims (2)

[Scope of utility model registration request] 1. A left side traveling device (13) in a power vehicle provided with a left side gear transmission system (86) for driving a left side traveling device (13) and a right side gear transmission system (87) for driving a right side traveling device (13). ) And the right side traveling device (13) have opposite traveling directions, a parking brake for a power vehicle provided with a parking gear (52) connecting the left side gear transmission system (86) and the right side gear transmission system (87). apparatus. 2. A steering speed change lever (7) for the left side traveling device (13) and a steering speed change lever (7) for the right side traveling device (13).
2. The parking brake device for a motor vehicle according to claim 1, wherein a parking lever (19) is provided so that both can operate the parking gear (52) at the stop position.