JPH0415809Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is designed to prevent the operation of the backhoe device from getting in the way when getting on and off the boarding section, or to avoid the risk of accidental operation due to contact. The lever is divided into two in the longitudinal direction, and for the first divided operation lever on the base end side of the attachment to the vehicle body,
A second split operating lever on the operating end side is swingably connected to a usage position in which it projects into the boarding/exiting space of the boarding/driving unit and a retracted storage position, and the second split operating lever is in the usage position. The present invention relates to an operating lever structure for a backhoe, which is provided with a locking device for preventing relative rocking of the second split operating lever and the first split operating lever.

[Conventional technology]

Conventionally, as shown in FIG. 7, the locking device in the above operating lever structure has a second split operating lever 22B in the usage position and a first split operating lever 22B in the operating position.
A are provided with holes 36, 36 that pass through them at the same time, and a lock pin 37 is provided in these holes 36, 36, which can be inserted and removed, or as shown in FIG. Operation lever 2
2A and 22B at the same time to prevent relative swinging of both split operating levers 22A and 22B, and a lock position that is disengaged from one split operating lever to allow relative swing of both split operating levers 22A and 22B. It is formed from a cylindrical member 38 which is swingably provided in the unlocked position.

[Problem that the invention attempts to solve]

However, when operating the backhoe device with the operating lever 22 in the operating position from the retracted position, the former locking device must be inserted into both holes 36, 36 by holding the lock pin 37 after the operating lever 22 is in the operating position. The latter locking device has the disadvantage that the cylindrical member 38 must be grasped and swung to the locked position after the operating lever 22 is in the operating position, making the operation cumbersome. .

The purpose of the present invention is to enable the operation lever to be used with simple operation.

[Means for solving problems]

The characteristic configuration of the operating lever structure of the backhoe according to the present invention is that in forming the locking device, either one of the first and second split operating levers is provided with an engaging portion, and the other is provided with an engaging portion for the engaging portion. A movable locking piece is provided between a locking position where the locking lever is engaged and a non-locking position where the locking lever is disengaged, and a spring is provided that biases the locking piece in the direction of moving the locking piece to the locking position. When changing the position from the storage position to the use position, the locking piece comes into contact with the locking piece, and while moving the locking piece to the unlocked position against the biasing force of the spring, the locking piece engages with the engaging portion. The reason is that a cam surface is provided on the engaging portion, and its effects are as follows.

[Effect]

In other words, by simply changing the position of the second split operating lever from the retracted position to the operating position, the locking piece resists the biasing force of the spring due to the action of the cam surface provided on the engaging part. While moving to the unlocked position, it is automatically engaged with the engaging part,
Relative rocking of the two divided operating levers is prevented, allowing the operating levers to be used.

[Effect of idea]

Therefore, while ensuring smooth boarding and alighting from the boarding section and ensuring safety during boarding and alighting, when operating the backhoe device, the backhoe device can be operated immediately by a simple operation of the control lever, improving work efficiency and We were able to further improve operability.

[Example] Next, an example of the present invention will be described based on the drawings.

As shown in FIG. 4, a swivel base 2 is attached to a machine base equipped with a pair of left and right crawler traveling devices 1 so as to be fully rotatable around the vertical axis P, and the operating cabin 3 and , a driving unit 4 is provided, and
A backhoe device 11 is constructed by sequentially connecting a boom 5, an arm 6, and a basket 7 so as to be able to swing freely around a horizontal axis using hydraulic cylinders 8, 9, and 10, respectively. A dozer device 15 is attached to the front end of the swivel base 2 via a swing bracket 13 and can be raised and lowered by a hydraulic cylinder 14, and is equipped with a dozer device 15 at the front end of the base, thereby constructing an excavation work vehicle capable of soil removal work. It has been done.

In configuring the interior structure of the driving cabin 3,
As shown in FIG. 3, a pair of left and right steering operation levers 18,
19. A pedal 20 for switching between high and low speeds and a service pedal 21 for operating the attachment work device are provided, and excavation work is performed on the upper end of the steps 17 on both sides of the front end of the driver's seat 16. A pair of left and right posts 24 and 25 are provided with operating levers 22 and 23 for the backhoe device that can be swung in two directions, respectively. An operating lever 26 for raising and lowering the swing bracket 13 and an operating lever 27 for swinging the swing bracket 13 from side to side are arranged side by side.

In the figure, 28 is a door that can be opened and closed.

As shown in FIGS. 1 and 2, the operating lever 22 of the backhoe device 11 is divided into two in the longitudinal direction, and the operating end side is separated from the first split operating lever 22A on the base end side where it is attached to the vehicle body. The operating position in which the second divided operation lever 22B of the board is protruded into the boarding/exiting space S of the boarding/driving section 29 (FIG. 1A)
and the retracted storage position (FIG. 1B), so that when the second split operating lever 22B is in the operating position, the second split operating lever 22B and the first split operating lever 22A can be pivoted relative to each other. A locking device 30 is provided to prevent movement.

To form the locking device 30, the second split operating lever 22B is provided with an engaging portion 31, and the first split operating lever 22A is provided with a lock position in which it engages with the engaging portion 31 and a non-locking position in which it disengages. A lock piece 32 that can be moved vertically is provided at the lock position, and a spring 33 is provided that biases the lock piece 32 in the direction of moving the lock piece 32 to the upper lock position.
When the split operating lever 22B is changed from the storage position to the operating position, it comes into contact with the lock piece 32 (FIG. 1 B → B) and pushes the lock piece 32 down against the biasing force of the spring 33. The engaging portion 31 is provided with a cam surface 34 that engages the engaging portion 31 while moving the locking member to the unlocked position.

To change the operation lever 22 from the operating position to the retracted position, grasp the locking piece 32 and push it downward to move it to the unlocked position.
The engagement state between the lock piece 32 and the engaging portion 31 is released, and the second divided operation lever 22B can be swung to the retracted position relative to the first divided operation lever 22A, and the entire operation lever 22 can be folded. can.

[Another example]

The engaging portion 31 and the lock piece 32 may be provided on either of the split operation levers 22A and 22B, respectively.

As shown in FIGS. 5 and 6, the lock piece 32 may be connected to an operating cylindrical member 35 that fits externally on one of the split operating levers, and this operating cylindrical member 35 can be grasped. By swinging the lock piece 32 up and down, the lock piece 32 is placed in the unlocked position and can be moved.

The door 28 may be provided on both the left and right sides of the operating cabin 3, and the operating lever provided with the lock device 30 is the left and right operating lever 2 for the backhoe device 11.
It may be 2 or 23.

[Brief explanation of drawings]

The drawings show an embodiment of the control lever structure of the backhoe according to the present invention, and FIG. 3 is a partially cutaway plan view of the backhoe, FIG. 4 is an overall side view of the backhoe, FIG. 5 is a partially sectional side view showing another embodiment, and FIG. 6 is another embodiment. A front view of a cross section of the main part showing the
FIGS. 7 and 8 are side views of conventional operating levers, respectively. 11...Backhand device, 22...Operation lever, 22A...First divided operation lever, 22B...
Second split operation lever, 29...boarding operation section, 30
... Lock device, 31 ... Engagement part, 32 ... Lock piece, 33 ... Spring, 34 ... Cam surface, S
...space for boarding and alighting.

Claims (1)

[Scope of utility model registration request] The operating lever 22 of the backhoe device 11 is divided into two parts in the longitudinal direction, and the first split operating lever 22A on the base end side where it is attached to the vehicle body is separated from the second split operating lever 22B on the operating end side. The second split operation lever 22B is pivotably connected to a protruding use position with respect to the getting-on/off space S of No. 29 and a retracted storage position, and in the use position of the second split operation lever 22B,
The operating lever structure of a backhoe is provided with a locking device 30 that prevents relative rocking between the second split operating lever 22B and the first split operating lever 22A. , one of the second split operating levers 22A, 22B is provided with an engaging portion 31, and the other is moved between a locked position where it engages with the engaging portion 31 and an unlocked position where it disengages. A locking piece 32 which can be operated freely is provided, and a spring 33 is provided which biases the locking piece 32 in the direction of locking the locking piece 32.
When the second split operation lever 22B is changed from the storage position to the use position, it comes into contact with the lock piece 32 and moves the lock piece 32 to the unlocked position against the biasing force of the spring 33. A cam surface 34 that is engaged with the engaging portion 31 while being moved.
and a backhoe operating lever structure provided on the engaging portion 31.