JP2003104245A - Cab tilt device and oil pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing and running costs of a cab tilt device, to fit an impact wrench in a automobile maintenance shop on a fitting part of a rotary shaft so as to omit a DC motor by operating an oil pump with compression air, and to fit a manual type wrench on the fitting part of the rotary shaft so that an oil pump for cab tilting is artificially operated in case of emergency, thus avoiding an additional emergency manual oil pump. SOLUTION: The cab tilt device comprises a tilt cylinder device 3 for tilting a cab interposed between the cab and a frame, and an oil pump 13 for providing pressure oil to a supply/drain hydraulic circuit 11 and 12 of the tilt cylinder device 3. The oil pump 13 is comprised of a radial piston pump, and at an edge part of a rotary shaft 24 there is provided a fitting part 25 on which a manual type wrench or an impact wrench is removably fitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab lockt device mounted on a cab-over engine type automobile, and more particularly to a cab lockt device which is provided between a cab and a frame and supplies hydraulic pressure to a tilt cylinder device for tilting the cab. For oil pumps for cars.

[0002]

2. Description of the Related Art In a medium- or large-sized cab-over type truck, a cavitating device is mounted so that inspection and maintenance of an engine portion can be carried out easily. In this cavitating device, a tilting cylinder device driven by an oil pump for cavitating is interposed between the cab and the frame, and a pressure is applied by an oil pump for cavitating to the oil passage on the rising side of the tilting cylinder device. When the oil is supplied, the cab is lifted, and when the pressure oil is supplied to the lower oil passage, the cab is lowered.

As a conventional cavitating device, an oil pump for cavitating is configured to be driven by a DC motor (hereinafter referred to as an automatic cavitating device), and an oil pump for cavitating is manually driven. (Hereinafter, referred to as a manual type cavitating device) configured to be performed.

A rotary oil pump is used as an oil pump for a carburt of the former automatic carburt apparatus, and a pump shaft of the rotary oil pump is rotated by a DC motor to be slidably fitted into a cylinder chamber. It is configured to perform a pumping action by reciprocating the oscillated piston. By the way, from the relationship between the output of the DC motor and the speed of the cavit, the theoretical displacement of the rotary oil pump is small (0.2 cc).
/ Rev)).

Generally, an automatic manual pump is provided with an emergency manual pump in order to cope with an emergency such as a failure of a DC motor. A reciprocating constant-volume oil pump is generally used as an emergency manual pump.In an emergency, by inserting the equipped lever into the socket attached to the piston and reciprocating the piston, , Configured to perform a pumping action. By the way, the theoretical displacement of a reciprocating constant displacement oil pump as an emergency manual pump is a medium volume (1 cc / re
v)).

A reciprocating constant volume type oil pump is generally used as an oil pump for the latter of the latter type of manual caulking apparatus, and a lever provided is inserted into a socket attached to a piston at the time of use. It is configured to perform a pumping action by reciprocating the piston. By the way, the theoretical displacement of this reciprocating constant displacement oil pump is set to a large capacity (about 4 cc / rev per operation) from the relationship between the operating force of the pump, the number of operations, and the cavitating speed. .

[0007]

DISCLOSURE OF THE INVENTION In an automatic cavitating apparatus, D is used as an oil pump for cavitating.
Since a rotary oil pump driven by a C motor is used and an emergency manual pump is additionally attached, not only the initial cost and running cost of the cab-till device are increased, but also the weight of the cab-over type truck is increased. Therefore, there is a problem that fuel consumption and the like are increased.

[0008] In the manual cavitating device, since it is necessary to reciprocate the piston by a lever when manually driving an oil pump for cavitating, not only is a great amount of labor and time wasted in tilting the cab, There is a problem that a large operation space is required for the cavitating work.

An object of the present invention is to provide an oil pump that can be manually operated and can be used with external power, and to provide a cavitating device using this oil pump.

[0010]

A first means for solving the above problems is a tilting cylinder device which is interposed between a cab and a frame for tilting the cab, and a lifting cylinder device for raising the tilting cylinder device. And an oil pump for supplying pressure oil to the lower and upper oil supply passages, the oil pump is constituted by a rotary constant volume oil pump, and a manual lever is provided at the end of the rotary shaft. And an impact wrench is detachably attachable to the mounting portion.

When the cab is tilted by the above-mentioned first means, an air-driven impact wrench, which is usually provided in an automobile maintenance factory or the like, is mounted on the mounting portion of the rotary shaft of the oil pump. When the air of the compressor is supplied to the mounted impact wrench, the rotation shaft of the oil pump is rotated by the driving force of the impact wrench, so that oil is supplied to the tilt cylinder and the cab can be tilted. Therefore, according to the above-mentioned first means, the DC for driving the oil pump which is rarely used.
The motor does not have to be always mounted on the vehicle, and the vehicle weight can be reduced.

Should it be necessary to tilt the cab at a place where no impact wrench is installed,
By mounting a manual wrench on the mounting part of the rotary shaft,
The oil pump can be operated manually. Therefore, it is not necessary to separately install an emergency manual oil pump.

A second means for solving the above-mentioned problems is a rotary shaft, a cylinder chamber radially arranged around the rotary shaft, and a cylinder chamber slidably fitted in the cylinder chamber. It is provided with a piston that moves back and forth in the cylinder chamber as the rotary shaft rotates, and a mounting portion to which a manual gear and an impact wrench can be detachably mounted is provided at an end portion of the rotary shaft. And

In the above-mentioned second means, since the rotary shaft of the oil pump is configured to be able to utilize two kinds of driving forces, that is, a manual gear and an impact wrench,
The impact wrench can be used when outside air is available, and the pump can be manually driven when outside air is not available. That is, according to the second means, it is possible to provide a pump with a wide range of use.

A third means for solving the above-mentioned problems is characterized in that a spacer for removing an air reservoir in the cylinder chamber is housed inside the cylinder chamber.

Since the spacer 35 is accommodated in the spring accommodating chamber 34, it is possible to eliminate the air accumulation in the plunger and improve the self-sufficiency of the pump.

The fourth means for solving the above-mentioned problems is to obtain a theoretical displacement of the oil pump of 1.0-2.
It is characterized in that it is set to 0 cc / rev.

The theoretical displacement of the oil pump is 1.0
By setting it to 2.0 cc / rev, it is possible to realize a pump that is easy to use as an oil pump for a cavitt, regardless of whether the oil pump is manually rotated or an impact wrench is used.

A fifth means for solving the above-mentioned problems is characterized in that the impact wrench is a pneumatic or hydraulic power source or an electric power source.

As a power source for driving the oil pump, instead of the impact wrench, a wide range of equipment such as air pressure, hydraulic pressure, and electricity can be used as the driving force for the oil pump, so that the range of use of the oil pump is further expanded. be able to.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the cavitating apparatus according to the present embodiment is a tilting cylinder that is interposed between the cab 1 and the frame 2 and that performs a tilting operation of the cab 1 by a hydraulic expansion / contraction operation. The device 3 is provided. That is, the cab 1 is rotatably supported in the front-rear direction by the fulcrum 1a on the frame 2, and the upper end of the piston rod 4 of the tilt cylinder device 3 is pivotally attached to the cab 1 via a link. The lower end of the cylinder 5 is rotatably attached to the frame 2.

As shown in FIG. 2, the hydraulic drive circuit 10 of the tilt cylinder device 3 includes a raising side supply / discharge oil passage (hereinafter referred to as a raising side oil passage) 11 and a lowering side supply / discharge oil passage ( Hereinafter, referred to as a lower oil passage) 12 and an oil pump 13
And a tank 14 and a manual switching valve (hereinafter referred to as a switching valve) 15. The raising side oil passage 11 is a frame side hydraulic chamber of the cylinder 5 (hereinafter referred to as a raising side hydraulic chamber).
The lower oil passage 12 is fluidly connected to 5a, and the lower oil passage 12 is fluidly connected to a cab side hydraulic chamber (hereinafter referred to as a lower hydraulic chamber) 5b of the cylinder 5.

The switching valve 15 is a 4-port / 2-position manually operated switching valve. Under normal conditions (when traveling with the cab down), the load port a of the oil passage 11 on the raising side is a tank. The load port b of the lower oil passage 12 is connected to the port T and the pump port P, respectively. At the time of switching by operating the lever 15a (at the time of tilting up), the load port a of the raising side oil passage 11 becomes the pump port P, and
The load port b of the lower oil passage 12 is configured to be connected to the tank port T, respectively. Raising side oil passage 11
A first pilot operated check valve (hereinafter referred to as the first pilot check valve) 16 is provided in the lower side oil passage 12 and a second pilot operated check valve (hereinafter referred to as the first pilot operated check valve). , Second pilot check valve). The first pilot check valve 16 and the second pilot check valve 17 block the flow from the cylinder 5 side to the switching valve 15 side when the hydraulic pressure is less than a preset pilot pressure value, and set the pilot Each is configured to allow the flow when the pressure value is exceeded.

3 to 9 show an oil pump 13 according to this embodiment. The oil pump 13 is constituted by a fixed cylinder type radial piston pump as shown in FIGS. 4 and 5. That is,
The oil pump 13 includes a casing 21 formed into a substantially rectangular parallelepiped shape, and a casing 22 for forming the tank 14 is covered on one end surface of the casing 21. A rotary shaft 24 is inserted into the casing 21 from the side opposite to the casing 22 and is rotatably supported by a pair of bearing metals 23, 23. The end of the rotary shaft 24 opposite to the casing 22 is the casing 21. Is projected outside. A mounting portion 25 to which a manual wrench 46 and an impact wrench 47 are detachably mounted is formed at the protruding end of the rotary shaft 24. In the present embodiment, the mounting portion 25 is formed in a hexagonal head shape so that the manual wrench 46 and the impact wrench 47 can be removably mounted via the box 25a which is a connecting member.

As shown in FIG. 4, a cam 26 is formed in the middle of the rotary shaft 24 so as to be eccentric to the center of rotation with an eccentric amount E, and a cam ring 27 is provided on the outer periphery of the cam 26. It is mounted via a winding bush 28. The rolling bush may be a rolling bearing. A cam ring accommodating chamber 29 is opened in a portion of the casing 21 corresponding to the cam ring 27, and a cylinder chamber 30 extends outside the cam ring accommodating chamber 29 of the casing 21 in the eccentric direction of the cam 26, and , And the inner edge.)
Is opened to open in the cam ring accommodation chamber 29. A plug 31 for closing the outer opening is press-fitted to the outer end of the cylinder chamber 30, and a piston 32 is slidably fitted in the cylinder chamber 30 in the eccentric direction of the cam 26. The inner end surface of the piston 32 is inserted into the cam ring accommodating chamber 29 so as to be able to move back and forth, and is constantly pressed against the outer peripheral surface of the cam ring 27 by the spring 33 that has obtained a reaction force from the plug 31, that is, the casing 21. The spring 33 is accommodated in a spring accommodating chamber 34 formed on the outer end surface of the piston 32.
A spacer 35 for removing the air reservoir is housed in the.

The theoretical displacement of the cylinder chamber 30 and the piston 32 is 1.0 to 2.0 cc.
It is desirable to set it to be / rev. If the theoretical displacement is less than 1 cc / rev, the amount of oil discharged when the rotary shaft of the oil pump is rotated once is small, and therefore it takes too much time to tilt the cab manually. Further, if the theoretical displacement volume exceeds 2 cc / rev, it becomes too heavy when manually tilting. By the way, in this embodiment, the tilt of the cab is set to be completed when the rotation axis of the oil pump 13 is 200 to 300 rotations.

A suction passage 36 is opened on the center line of the plug 31 so as to communicate with the end surface of the cylinder chamber 30.
The other end of the suction passage 36 is in communication with a suction port 37 that is opened in the side wall of the casing 21 so as to communicate with the tank 14. A suction valve 38 is provided in the middle of the suction passage 36, and the suction valve 38 is configured to allow only the flow from the suction port 37 side to the cylinder chamber 30 side. A filter 39 is attached to the suction port 37, and seal rings 40, 40 are sandwiched between both ends of the plug 31, respectively.

As shown in FIG. 5, a discharge passage 41 is opened in the side wall of the plug 31 and the casing 21 so as to communicate with the side surface of the cylinder chamber 30, and the discharge passage 4 is formed.
1 communicates with the discharge valve chamber 43a via the discharge valve 43. Then, as shown in FIGS. 6 and 8, the discharge valve chamber 43a communicates with the valve body 15A of the switching valve 15 via the oil passages 41a and 41b. The switching valve 15 is provided with a switching lever 15a as shown in FIG. 3 (a). When the switching lever 15a is in the vertical position as shown by the solid line, the cab is tilted. This is when you go down. At this time, the valve body 15A is shown in FIG.
In the position shown in (b) and FIG. 7, oil is supplied to the lower hydraulic chamber 5b of the cylinder 5 of the tilt cylinder device 3 through the oil passages 41a, 41b, 41d. On the other hand, the oil in the raising hydraulic chamber 5a of the cylinder 5 enters the valve body 15A through the oil passage 41c and returns to the tank 14 through the return passage 42. The switching lever 15a is shown in FIG.
(A) When the cab is tilted up when switched to the horizontal position shown by the alternate long and short dash line. At this time, the valve body 15A is in the position shown in FIGS. 9A and 6, and the oil is in the oil passages 41a, 41b, 41.
It is supplied to the raising hydraulic chamber 5a of the cylinder 5 through c. On the other hand, the oil in the lower hydraulic chamber 5b of the cylinder 5 passes through the oil passage 41d and enters the valve body 15A, and the return passage 42
Returned to the tank 14 through.

As shown in FIGS. 2 and 8, a relief passage 44 is provided in the casing 21 of the oil pump 13.
The relief valve 4 is installed in the relief passage 44.
5 is installed. The relief valve 45 prevents the hydraulic pressure of the hydraulic circuit from becoming abnormally high due to some failure.

FIG. 10 shows an embodiment in which the oil pump 13 is rotated by a manual wrench 46 having a ratchet mechanism. That is, the rotary shaft 24 of the oil pump 13
A manual wrench 46 is mounted on the mounting portion 25 of FIG. The manual gear for manually driving the oil pump 13 is not limited to the manual wrench 46 provided with the ratchet mechanism, but may be any one that can rotate the rotary shaft 24 such as a spanner or glasses. Anything is fine.

FIG. 11 shows an embodiment in which the oil pump 13 is rotated by the impact wrench 47. Also in this case, as in FIG. 10, the mounting portion 25 and the impact wrench 4 are
A box 25 a is interposed between the box 25 a and the box 7. The impact wrench 47 may be another pneumatic, hydraulic or electric drive source.

Next, the method of use and the operation of the cavitating apparatus having the above-mentioned structure will be described.

When the cab 1 is tilted up in an automobile maintenance shop or the like, the switching lever 15a of the switching valve 15 is used.
Is switched to the horizontal position shown by the imaginary line in FIG. Then, the valve body 15A is switched to the position shown in FIG. 9 (a). When this is shown in the hydraulic circuit diagram of FIG. 2, the pump port P of the switching valve 15 is connected to the load port a, and the tank port T is connected to the load port b. Then, the cab lock of the cab lock device 48 is released by the manual lever 49. Subsequently, as shown in FIG. 11, an impact wrench 47, which is usually provided in an automobile maintenance factory or the like, is mounted on the mounting portion 25 of the rotary shaft 24 of the oil pump 13 by an operator. When air from the compressor is supplied to the impact wrench 47, the rotary shaft 24 of the oil pump 13 is forcibly rotated by the rotational force of the impact wrench 47. That is, the oil pump 13 is driven by the driving force of the impact wrench 47.

When the operator wants to tilt up the cab 1, the switching lever 15a of the switching valve 15 is switched to the raising side (horizontal position) in FIG. 3 (a). As shown in FIG. 11, when the impact wrench 47 rotates the oil pump 13, the cam 26 rotates in FIG. 4, the piston 32 moves up and down, and the oil in the tank 14 is transferred to the cylinder via the filter 39. Inhaled into chamber 30, FIG.
The oil is sent out to the discharge valve chamber 43a through the discharge passage 41 shown in FIG. As shown in FIGS. 6 and 8, the oil sent to the discharge valve chamber 43a is sent to the valve body 15A of the switching valve 15 via the oil passages 41a and 41b. The oil sent to the valve body 15A is sent in the direction of the oil passage 41c depending on the direction of the notch of the valve body, and then is sent to the raising side oil passage 11 shown in FIG. The pressure oil that has been pressure-fed to the raising-side oil passage 11 flows into the raising-side hydraulic chamber 5a of the cylinder 5 of the tilt cylinder device 3 through the first pilot check valve 16, and the piston rod 4 is extended to actuate the cab. Lift 1 from frame 2 and tilt up.

Here, in order to extend the piston rod 4, it is necessary to discharge the pressure oil from the lower hydraulic chamber 5b of the cylinder 5. In FIG. 2, when the hydraulic pressure in the raising side oil passage 11 becomes equal to or higher than the pilot pressure value set in the second pilot check valve 17, the second pilot check valve 17
Opens. When the second pilot check valve 17 opens, the pressure oil in the lower hydraulic chamber 5b of the cylinder 5 flows into the second pilot check valve 17 of the lower oil passage 12, the oil passage 41d of FIG. It is discharged to the tank 14 of FIG. 8 via the valve body 15A and the return passage 42. Therefore, the piston rod 4 of the tilt cylinder device 3 can be extended to tilt the cab 1 up.

When the cab 1 is tilted up to a preset position, the operator stops the operation of the oil pump 13 by the impact wrench 47. At this time, the tilting up of the cab 1 is automatically prevented by the operation of the first pilot check valve 16 shown in FIG. When the oil pump 13 is stopped, the oil pressure between the first pilot check valve 16 and the oil pump 13 of the raising side oil passage 11 is reduced due to internal oil leakage of the oil pump 13, so that the second pilot check valve 17 The hydraulic pressure falls below the set pilot pressure value, and the second pilot check valve 17 closes. When the second pilot check valve 17 is closed, the pressure oil in the lower hydraulic chamber 5b of the cylinder 5 cannot be discharged, so that the piston rod 4 of the tilt cylinder device 3 cannot be extended.

Thereafter, when the operator intends to tilt down the cab 1, the switching lever 15a is switched to the tilt down side in FIG. 3 (a). continue,
The oil pump 13 is driven by the driving force of the impact wrench 47, so that the pressure oil of the oil pump 13 is lowered in the oil passage 1
Pumped to 2. The pressure oil that has been pressure-fed to the lower oil passage 12 is the lower hydraulic chamber 5b of the cylinder 5 of the tilt cylinder device 3.
To the cab 1 through the second pilot check valve 17 and the piston rod 4 which has been extended is shortened to tilt down the cab 1.

Here, in order for the piston rod 4 to perform a shortening operation, it is necessary to discharge the pressure oil in the raising hydraulic chamber 5a of the cylinder 5. In the present embodiment, when the pressure of the first pilot check valve 16 connected to the lower oil passage 12 becomes equal to or higher than the pilot pressure value set in the first pilot check valve 16, the first pilot check valve 16 becomes The check valve 16 opens. In FIG. 2, when the first pilot check valve 16 is opened, the pressure oil in the raising hydraulic chamber 5a of the cylinder 5 passes through the first pilot check valve 16 and the valve body 15A of the switching valve 15 and the return passage 42. Since it is then discharged to the tank 14, the piston rod 4 of the tilt cylinder device 3 is shortened and the cab 1 can be tilted down.

For example, when the cab 1 is tilted up and tilted down in a place where an impact wrench other than an automobile maintenance factory is not always provided such as in an emergency, as shown in FIG. 10, the impact wrench is used. Instead of 47, a manual wrench 46 is mounted on the mounting portion 25 of the rotary shaft 24 of the oil pump 13 by a worker via a box 25a which is a connecting member.
By rotating the rotary shaft 24 of FIG. 1 by human power applied to the manual wrench 46, the oil pump 13 is manually operated.

According to the above embodiment, the following effects can be obtained.

1) An impact wrench, which is normally provided in an automobile repair shop, is attached to the mounting portion of the rotary shaft of the oil pump for the cabot, and the driving force of the impact wrench by the supply of air from the compressor is used to drive the oil pump for the cabot. The rotating shaft can be rotated. That is, since the oil pump for the cabult can be operated without human power by using external power,
The cabult device does not need to be equipped with a DC motor that is rarely used all the time, and the cab can be tilted up and down without wasting a lot of labor and time.

2) For example, when it is necessary to tilt the cab up and down in a place where an impact wrench is not installed, such as in an emergency, it is necessary to manually mount the rotary shaft of the oil pump for the cabot. By installing a rotary wrench, the oil pump for the cabot can be operated manually, so it is not necessary to separately install an emergency manual oil pump.

3) By omitting the installation of the DC motor and the auxiliary equipment for the emergency manual oil pump, the manufacturing cost and running cost of the cavitating device can be greatly reduced, and the price of the cab-over engine type automobile can be reduced. Fuel consumption etc. can be reduced.

4) By setting the theoretical displacement of the oil pump for the cabutylt to 1.1 cc / rev, it is possible to operate the oil pump for the cabutylt with an impact wrench and the oil pump for the cabutylt with a manual wrench. In either case, the cavitating rate can be maintained at an appropriate level.

Needless to say, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the scope of the invention.

For example, the theoretical displacement volume of the oil pump for the cabot is not limited to 1.1 cc / rev, but it should be set in accordance with the relationship between the cabot't speed and the rotational speed of the impact wrench and the manual wrench. 0
It is desirable to set to ~ 2.0 cc / rev.

Specific structures of the tilt cylinder device, the hydraulic drive circuit and the like are not limited to those in the above embodiment.

[0049]

As described above, according to the present invention,
The manufacturing cost and running cost of the cavitating apparatus can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cab-over type automobile equipped with a cabulting apparatus according to an embodiment of the present invention.

FIG. 2 is a hydraulic circuit diagram of the cavitating apparatus.

FIG. 3 shows an oil pump, (a) is a front view, (b)
Is a partially cut side view.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along the line VV of FIG. 3 (b).

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 3 (b), showing the flow of oil during the cavitating.

FIG. 7 is a cross-sectional view taken along line VI-VI in FIG. 3B, showing an oil flow at the time of cavitating.

FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 3B, showing an oil flow at the time of cavitating.

9A and 9B are enlarged partial cross-sectional views showing the valve body, in which FIG. 9A shows a cabulted up state, and FIG. 9B shows a cabulted down state.

FIG. 10 is a side view showing a state in which a manual lever is attached to the oil pump.

FIG. 11 is a side view showing a state where an impact wrench is attached to the oil pump.

[Explanation of symbols]

1 ... Cab, 1a ... Support point, 2 ... Frame, 3 ... Tilt cylinder device, 4 ... Piston rod, 4a ... Piston,
5 ... Cylinder, 5a ... Frame side hydraulic chamber (raising side hydraulic chamber), 5b ... Cab side hydraulic chamber (lowering hydraulic chamber), 10 ...
Hydraulic drive circuit, 11 ... Raising side oil supply / exhaust passage (raising side oil passage),
12 ... Lower side oil supply / exhaust passage (lower side oil passage), 13 ... Oil pump for cavit, 14 ... Tank, 15 ... Manual switching valve (switching valve), 15A ... Valve body, 15a ... Switching lever,
16 ... 1st pilot check valve, 17 ... 2nd pilot check valve, 21 ... Casing, 22 ... Housing, 23 ... Bearing metal, 24 ... Rotating shaft, 25 ... Mounting part, 25a ... Box (connecting member ), 26 ... Cam, 27 ... Cam ring, 28
... winding bush, 29 ... cam ring accommodating chamber, 30 ... cylinder chamber, 31 ... plug, 32 ... piston, 33 ... spring, 34 ... spring accommodating chamber, 35 ... spacer, 36
... Suction path, 37 ... Suction port, 38 ... Suction valve, 39 ... Filter, 40 ... Seal ring, 41 ... Discharge path, 41a,
41b, 41c, 41d ... Oil passage, 42 ... Return passage, 4
3 ... Discharge valve, 43a ... Discharge valve chamber, 44 ... Relief passage,
45 ... relief valve, 46 ... manual wrench (manipulator),
47 ... Impact wrench, 48 ... Cab lock device, 4
9 ... Manual lever.

Claims (5)

[Claims] 1. A tilt cylinder device which is interposed between a cab and a frame for tilting the cab, and an oil pump which supplies pressure oil to an ascending side and a descending side oil supply / exhaust passage of the tilt cylinder device. In addition, the oil pump is constituted by a rotary constant volume type oil pump, and at the end of its rotary shaft is provided a mounting part to which a manual gear and an impact wrench can be removably mounted. A cabling device characterized by. 2. A rotary shaft, a cylinder chamber radially arranged around the rotary shaft, and a cylinder chamber slidably fitted in the cylinder chamber so as to be slidable in the radial direction. An oil pump, which is provided with a piston, and a mounting portion to which a manual lever and an impact wrench can be detachably mounted, are provided at an end portion of the rotary shaft. 3. The oil pump according to claim 1 or 2, wherein a spacer that removes an air reservoir in the cylinder chamber is housed inside the cylinder chamber. 4. The theoretical displacement volume is 1.0 to 2.0 c.
The oil pump according to claim 1, 2 or 3, wherein the oil pump is set to c / rev. 5. The oil pump according to claim 1, wherein the impact wrench is a pneumatic, hydraulic, or electric power source.