JP3528939B2 - Cab mounting device for vehicle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle cab mount device, and more particularly to a vehicle cab mount device in which a cab is supported on a vehicle body via an air spring.

[0002]

As shown in Prior Art FIG. 7, in recent years, because the better ride quality of the cab F, arranged air spring E1, E2 before and after the left and right sides of the cab F, the air spring E
The cab F is supported by the vehicle body via 1 and E2. Physics
Conventionally, this type of cab mount device is constructed as shown in FIG.

That is, the cab mount device of this vehicle is
Set the height of the cab F to the air tank 50 at the neutral position (cab F
A leveling valve 51 for holding the leveling lever 54 in a horizontal state according to the load of (1) is connected, and a magnetic valve 52 for opening and closing air is connected to the leveling valve 51. Then, Ma Gune tic valve 5 2, via the auxiliary tank D to increase the air capacity
Is connected to the air springs E1 and E2 of the cab F. The magnetic valve 52 is used for the cab F during braking.
Inside the air springs E1 and E2 due to the load applied to the front of
To prevent the cab F from wobbling due to fluctuations in the air pressure of
It is a valve for. Moreover, in FIG. 7, T is a tire.

[0004] Then, depending on the load of the cab F, and leveling lever 54 Les Belin <br/> Gubarubu 51 operates to supply air to the air springs E1, E2, also air of the air springs E1, the E2 Is exhausted to the atmosphere from the air exhaust port 55 of the leveling valve 51 to maintain the height of the cab F in a neutral state.

[0005]

However, in the cab mount device for a vehicle described above , the leveling valve 51 and the magnetic valve 52 are arranged at arbitrary positions, and the
Then , connect both valves 51 and 52 with an air tube 53.
Was. Therefore, it is necessary to air tube 3 for connecting the leveling valve 51 and a magnetic valve 52, such even number of steps required for its mounting only. In addition , since the air tube 53 is connected between the valves 51 and 52, a time delay of the air flow occurs and the response is not good.

Further, since the leveling valve 51 and the magnetic valve 52 are separately arranged, a large space is required. The present invention has been devised in view of the above, and by reducing the number of parts by integrating the leveling valve and the magnetic valve, the cost and time can be reduced (the number of mounting steps can be reduced) and the responsiveness can be improved. It is an object of the present invention to provide a cab mount device for a vehicle, which is improved in size and can be made compact.

[0007]

In order to achieve such an object, the invention according to claim 1 is connected to an air tank,
A leveling valve that holds the height of the hub in the neutral position,
Installed on the left and right sides of the cab,
An air spring connected to the lube via an air passage,
A magnet that operates during braking of the vehicle to close the air passage.
And a tick valve.
Air to the air spring or air from the air spring
Evacuate to atmosphere to maintain cab height in neutral position
A cab mount device for a vehicle, wherein the magnetic
The valve is located in the upper center of the valve body of the leveling valve.
It is formed integrally with the provided protrusion and the level
Air from the valve side to the magnetic valve side.
On the other hand, from the magnetic valve side to the leveling valve side
Air inlet / outlet for returning air to the magnetic valve side
While supplying air from the air spring side to the air spring side,
Air guide that returns air from the ring side to the magnetic valve side
It is characterized in that an inlet / outlet port is provided .

The invention according to claim 2 is based on claim 1.
Leveling in the vehicle cab mount device described
The valve and magnetic valve are integrally formed by casting.
It is characterized by

[0009]

According to the inventions of claims 1 and 2, the magnet
Place the tick valve above the center of the valve body of the leveling valve
Formed integrally with the protruding portion provided on the
Air is guided from the belling valve side to the magnetic valve side.
On the other hand, leveling valve from the magnetic valve side
Air inlet and outlet for returning air to the
While supplying air from the valve side to the air spring side,
Return air from the spring side to the magnetic valve side.
Since an inlet / outlet port is provided, a magnetic valve and level
It is not necessary to provide an air tube to connect the ring valve.
It's gone.

[0010]

[0011]

Embodiments of the present invention will be described below with reference to the drawings . FIG. 1 shows an embodiment of a cab mount device, and FIG.
Among them, 1 is an air tank provided in the vehicle, A is a leveling valve B and a magnetic valve C connected to the air tank 1.
It is a valve that combines and.

That is, the valve A is formed by integrally forming a leveling valve B for holding the height of the cab of the vehicle at a neutral position and a magnetic valve C for opening and closing air .
FIG. 2 shows a leveling valve B and a magnetic valve C.
FIG. 3 shows a valve A which is integrally formed by being combined.
The connecting part between the magnetic valve B and the magnetic valve C is cast.
Shows a valve A integrally formed with.

The leveling valve B of the valve A includes
An air inlet B1 to which air is supplied from the air tank 1 is provided above the valve body 2, an air outlet B2 is provided below the valve body 2 to exhaust return air from air springs E1 and E2, which will be described later, and a valve body 2 while supplying air to the magnetic valve C side at the top center, it is provided as air introduction outlet B3 to be back the air from the magnetic valve C side.

The magnetic valve C of the valve A is
The valve body 2 is provided on a protrusion 3 at the upper center thereof, and air is introduced from the side of the leveling valve B to the protrusion 3 corresponding to the leveling valve B, while the magnetic valve C is moved to the side of the leveling valve B. a leveling valve B side of the d a introduction outlet C3 returning the air, while supplying air to the air springs E1, E2, the air introduction outlet returning the air from the air springs E1, E2 side magnetic valve C side C4 And are provided.

The air introduction port B1 provided in the upper portion of the valve body 2 is composed of a flanged cylindrical cap 5 which is inserted in the upper portion of the valve body 2 via an O-ring 4. The air outlet B2 provided in the lower portion of the valve body 2 is composed of a dust cover 7 held in the lower portion of the valve body 2 by tightening the band 6. The air inlet / outlet port B3 of the leveling valve B provided in the upper center part of the valve body 2 is composed of a lateral hole 8 formed in the direction toward the magnetic valve C side, while it is provided in the protruding portion 3 of the valve body 2. The air inlet / outlet port C3 of the magnetic valve C thus formed is composed of a lateral hole 9 formed in the direction toward the leveling valve B side.

The air inlet / outlet port B3 of the leveling valve B and the air inlet / outlet port C3 of the magnetic valve C on the side of the leveling valve B are directly connected. The air inlet / outlet port C4 provided at a position above the air inlet / outlet port C3 is composed of a lateral hole 11 communicating with the elbow mounting receiving portions 10a, 10b connected to the air passages on the air spring E1, E2 side. .

Air inlet B1 of the leveling valve B
An upper valve chamber G1 and a lower valve chamber G2 are provided between the upper valve chamber G1 and the air outlet B2, and an upper valve seat 12 and a lower valve seat 13 are internally provided in the upper valve chamber G1. The upper valve seat 12 is internally provided with a check valve a which is always in contact with the upper surface valve seat 15 by a spring 14 and which opens when an air pressure higher than a predetermined value is applied.
A valve b with a shaft, which is inserted into a lower through hole 17 that is in contact with a lower valve seat 16 via a spring 14, is installed below.

The lower valve seat 13 has a spring 1
A valve c that contacts the lower valve seat 19 via 8 is installed. Further, the lower valve seat 13 is provided with a hole 20 corresponding to the lateral hole 8 of the air inlet / outlet port B3. A piston 22 that moves up and down via a spring 21 is installed in the lower valve chamber G2.
A spool 24, which is in contact with the valve c through a hole 23 penetrating between the upper valve chamber G1 and the lower valve chamber G2, and which is screwed to the piston 22, is installed in the center of 2.

The spool 24 has an air passage 25 formed in the upper portion of the spool 24 for introducing air returning from the magnetic valve C to the air outlet B2 side from the center and the lower portion of the upper portion toward the periphery. A nut 26 that supports the piston 22 is provided on the lower side of the spool 24. As the piston 22 moves up and down, the spool 24 screwed to the piston 22 moves up and down. Then, when the spool 24 rises, the air passage 25
The upper side of the spool 24 on which the valve c is formed is the valve c.
(In the neutral state, the valve c and the bottom valve seat 19
And is in contact with the upper side of the spool 24. ), The entrance of the air passage 25 is closed.

On the other hand, when the spool 24 screwed to the piston 22 descends, the valve c also descends and the valve c contacts the lower valve seat 19 (in the neutral state, the valve c, the lower valve seat 19 and the upper portion of the spool 24). , The valve c stops at that position, and the spool 24
And the upper side of the spool 24 where the air passage 25 is formed is separated from the valve c, and the passage opening of the air passage 25 is opened.

Air passes through the notch (not shown) formed in the lower surface of the valve c, which is in contact with the lower valve seat 19, and through the notch (not shown) formed in the lower valve chamber of the spool 24. It is distributed to G2. The piston 22 is formed with an air passage 27 that communicates from an upper portion to a lower portion of the piston 22 so that air flows from above the piston 22 to below.

A dust valve d consisting of a seal rubber 28 and a seal plate 29 made of a spring material is provided inside the dust cover 7 of the air outlet B2. When a predetermined air pressure is applied to the dust valve d, the hole 30 formed in the seal plate 29 that is in contact with the seal rubber 28 is opened so that the air flows downward.

A small valve chamber G3 is provided in the protruding portion 3 of the valve body 2, and the opening portion of the lateral hole 9 of the air inlet / outlet port C3 is opened upward on the lower side of the valve chamber G3. Further, the opening portion of the lateral hole 11 of the air introduction / extraction port C4 described above is opened on the side surface of the valve chamber G3. In the valve chamber G3, a lower surface valve seat 31 is provided at the bottom of the valve chamber G3 where the air inlet / outlet port C3 is open, and a valve with shaft e that is always open above the lower surface valve seat 31 via a spring 32. Is decorated.

A bearing portion 33 protruding as shown in FIG. 2 is provided at the lower center of the valve body 2, and the bearing portion 33 is rotatable by being locked by a stopper bolt M1 which regulates in the axial direction. The rotating shaft 34 attached to the is fitted. A leveling lever 35 that moves up and down by the load of the cab F is mounted on the outside of the rotating shaft 34 by a bolt M2, and a pin 36 is mounted on the inside of the rotating shaft 34 so as to be eccentric with respect to the shaft center. In addition, an oil seal 38 held by a washer 37 is attached to the bearing portion 33 in order to prevent oil from flowing out.

On the other hand, the piston 22 has a notch groove 39 in the circumferential direction on the side of the rotary shaft 34 corresponding to the pin 36.
Is formed, the pin 36 eccentrically attached to the rotary shaft 34 engages with the notch groove 39, and the piston 22 moves up and down by the rotation of the rotary shaft 34. Then, the leveling lever 35 is rotated up and down by the load of the cab, and the piston 22 is moved up and down via the pin 36 according to the rotating position, and the spool 24 that is screw-engaged with the piston 22 is moved up and down as described above. By opening and closing the spool 24, the valve b with a shaft on the upper part of the valve body 2 is opened and closed.
Further, the passage opening of the air passage 25 on the upper side of the spool 24 is opened and closed.

A case 40 is attached to the upper portion of the protruding portion 3, and a core 41 for holding the shaft-equipped valve e is provided in the case 40, and a plunger (movable iron core) is provided on the shaft-equipped valve e. 42 are provided. A coil 43 for exciting the plunger (movable iron core) 42 is provided on the outer periphery where the core 41 and the plunger 42 are provided. Air spring E1 of the magnetic valve C of the protrusion 3
An air passage 44 is connected to the air inlet / outlet port C4 on the E2 side.
It is connected to a and 10b. 43a is a coil 43
It is a cable that sends a signal to.

Then, as shown in FIG. 1, the elbow mounting receiving portions 10a and 10b of the valve A have elbows 45a, respectively.
3 way connector 47a, 47 is installed in each tank chamber D1, D2 of the auxiliary tank D which is equipped with 45b to increase the air capacity.
b, each tank D1 of valve A and auxiliary tank D1,
D2 are connected by air tubes 46a and 46b, and elbows 49a and 49b are attached to air springs E1 and E2 provided on the left and right sides of the cab F as shown in FIG. E1 and E2 are connected by air tubes 48a and 48b.

The valve A in which the leveling valve B and the magnetic valve C are integrated is fixed to, for example, the cab side of the vehicle, while the leveling lever 35 of the leveling valve B is fixed to the vehicle body side. In FIG. 3, A1 and A2 are valve mounting holes. Next, the operation of the vehicle cab mount device of the present invention will be described.

First, when the load of the cab F does not change and is constant, the leveling lever 35 of the leveling valve B which holds the neutral position is in the horizontal position O as shown in FIG. In this neutral state, the valve b is in contact with the lower valve seat 16 and is closed, and the valve c is in contact with the lower valve seat 19 and the upper side of the spool 24, and the passage of the air passage 25 on the upper side of the spool 24 is closed. ing. The air in the air tank 1 does not flow toward the air springs E1 and E2, and the air in the air springs E1 and E2 is not exhausted from the air exhaust port B2.

Next, when a plurality of people are riding in the cab F, the leveling lever 35 of the leveling valve B for holding the height of the cab F at the neutral position is increased by the load in the cab F increasing horizontally. Ascending from the position (neutral position) O in the direction of arrow H in FIG. When the leveling lever 35 moves up,
Due to the rise of the leveling lever 35, the rotary shaft 34 rotates to one side (for example, counterclockwise), and the position of the pin 36 eccentrically mounted on the rotary shaft 34 becomes higher and the pin 36 increases.
The piston 22 that engages with the piston 2 via the notch groove 39 rises against the spring force of the spring 21, and accordingly the piston 2
The spool 24, which is screw-engaged with 2, rises.

Further, as the spool 24 is raised, the valve b with a shaft that contacts the valve c via the valve c is lifted against the spring 14, and the valve b with a shaft is opened. Then, the air from the air tank 1 passes through the backflow prevention valve a opened at a predetermined air pressure, and the valve b with the shaft is opened.
Through the air inlet / outlet port B3 of the leveling valve B.
Then, it passes through the air inlet / outlet port C3 of the magnetic valve C and reaches the valve e with a shaft and the air inlet / outlet port C4, the air passage 44, and the elbow insertion / reception parts 10a and 10b which are always open.

Further, the air is sent to the air springs E1 and E2 arranged on the left and right sides of the vehicle through the tank chambers D1 and D2 of the auxiliary tank D. Also, this operation is
The leveling lever 35 is supplied until it reaches a horizontal position. That is, the operation is performed until the leveling lever 35 becomes horizontal, the spool 34 returns to a predetermined position, and the valve b with a shaft reaches the position of the lower valve seat 16 and is closed.

Therefore, the air springs E1 and E2 have spring constants suitable for the load of the cab F on which a plurality of people are riding.
On the other hand, when the number of passengers in the cab F decreases, the load in the cab F decreases and the leveling lever 35 of the leveling valve B moves to the horizontal position (neutral position) O shown in FIG.
From, it descends in the direction of arrow L in FIG.

When the leveling lever 35 is lowered, the lowering of the leveling lever 35 causes the rotary shaft 34 to rotate to the other side (for example, clockwise), and the position of the pin 36 eccentrically mounted on the rotary shaft 34 is changed. When the piston 22 is lowered and engages with the pin 36 via the notch 39,
The spool 24, which is screw-engaged with the piston 22, is lowered accordingly.

When the spool 24 descends, the spool 24
The valve c, which was in contact with the upper part of the, descends by the spring 18. Due to the lowering of the spool 24, the valve c
Is stopped while being in contact with the lower surface valve seat 19, the spool 24 is further lowered and separated from the valve c, and the passage opening of the air passage 25 formed on the upper side of the spool 24 is opened.

Then, the air from the air springs E1 and E2 is constantly introduced to the air introduction / extraction port B3 of the leveling valve B through the valve e with a shaft of the magnetic valve C.
Return to the inside of the leveling valve B through the bottom valve seat 1
When a predetermined air pressure is applied through a notch (not shown) formed around the valve c which is in contact with the valve 9 and on the lower surface, and through the open air passage 25 of the spool 24 and the air passage 27 of the piston 22. The air is discharged from the air exhaust port B2 to the atmosphere through the dust valve d to be opened.

This operation is performed until the leveling lever 35 reaches the horizontal position, that is, the neutral position, the air of the air springs E1 and E2 is exhausted, and the spring constant becomes suitable for the load of the cab F. By the way, when the braking is applied while the leveling lever 35 is traveling in the substantially neutral position, a load is applied to the front of the cab F and the air springs E1, E.
The air inside 2 fluctuates, but at that time, a drive signal is sent to the magnetic valve C to close the normally open shaft-equipped valve e. Therefore, by closing the shaft-equipped valve e, the cab F is closed.
Can prevent the upset of.

[0038] In this embodiment, formed integrally with the valve A by combining and the magnetic valve C leveling valve B
Configuration, leveling valve B and magnetic valve
Although the configuration in which C and C are integrally formed by casting is described,
In either case, the air inlet / outlet port B3 of the leveling valve B and the air inlet / outlet port C3 of the magnetic valve C on the side of the leveling valve B are directly connected, so that the air tube connecting the leveling valve B and the magnetic valve C is connected.
And the related parts for connecting the air tube are not required.
Therefore, the number of parts can be deleted .

Further, since the air inlet / outlet port B3 of the leveling valve B and the air inlet / outlet port C3 of the magnetic valve C are directly connected, there is no time delay in the air flow and the response is improved. Further, it is advantageous in terms of space. Further, in this embodiment, the air capacity can be increased by connecting the tank chambers D1 and D2 of the auxiliary tank D between the magnetic valve C of the valve A and the air springs E1 and E2. As a result, the sudden change of the air springs E1 and E2 is eliminated, and the sway of the cab F is reduced.

The above-mentioned auxiliary tank D may be omitted if the air springs E1 and E2 have large air capacities.
Good.

[0041]

As described above, the invention according to claim 1 uses a magnetic valve as a leveling valve.
Formed integrally with the protrusion provided on the upper center of the body,
From the leveling valve side to the magnetic valve side
While introducing air into the
An air inlet / outlet port that returns air to the ring valve side
Supply air from the tick valve side to the air spring side
On the other hand, from the air spring side to the magnetic valve side
An air inlet / outlet port for returning the air is provided, and according to claim 2.
The invention casts a leveling valve and a magnetic valve.
Since the integrally formed with the object, and the air tube connecting the leveling valve and a magnetic valve, deletion of parts elbow for connecting the air tube becomes unnecessary is achieved, cost reduction, the standard time of reduction At the same time, the time delay of the air flow is eliminated and the response is improved. Further, according to these inventions, since a large space is not required,
There is an advantage that the entire cab mount device can be made compact.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a cab mount device for a vehicle .

[Fig. 2] Connect the leveling valve and the magnetic valve .
FIG. 3 is an enlarged front view showing a cross-section with a part of a valve integrally formed by cutting together .

FIG. 3 is a connecting portion of a valve in which a connecting portion of a leveling valve and a magnetic valve is integrally formed by casting,
FIG. 6 is a vertical cross-sectional view of the valve cut so that an elbow mounting receiving portion appears .

FIG. 4 is a sectional view taken along line YY of FIG. 2 when the vehicle height is neutral (when the leveling valve is horizontal).

5 is a cross-sectional view taken along line YY of FIG. 2 when the vehicle height is increased (when the cab load is increased).

FIG. 6 is a sectional view taken along line YY of FIG. 2 when the vehicle height is lowered (when the cab load is reduced).

FIG. 7 is a schematic view of a cab in which an air spring is arranged.

FIG. 8 is a configuration diagram of a conventional cab mount device for a vehicle.

[Explanation of symbols]

1 air tank 2 valve body 35 Leveling lever a Air backflow prevention valve b Valve with shaft c valve d dust valve e valve B Leveling valve B1 air inlet B2 Air outlet B3 Air inlet / outlet port C magnetic valve C3 air inlet / outlet port C4 Air inlet / outlet port D auxiliary tank E1, E2 Air spring F cab

Front page continuation (72) Inventor Miji Nagashima 80, Nakazato, Yoji, Saitama Prefecture Miwa Seiki Co., Ltd. (56) Reference JP-A 63-199111 (JP, A) JP-A 60-161207 (JP, A) JP-A-8-156834 (JP, A) Actual opening 63-160280 (JP, U) Actual opening 4-56506 (JP, U) Actual opening 2-124709 (JP, U) Actual opening 63 -158481 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B62D 24/02 B62D 33/06 B60G 17/056

Claims (2)

(57) [Claims] 1. A cab height connected to an air tank
The leveling valve that holds the neutral position and the front and rear of the left and right sides of the cab are installed.
Air spring connected to the lube through the air passage, and a magnet that operates when the vehicle is braked to close the air passage.
And a tick valve.The leveling valve supplies air to the air spring.
Air from the air supply or air spring is exhausted to the atmosphere,
Vehicle cab mount that keeps the height of the vehicle in a neutral position
A location, the magnetic valve, of the leveling valve valve
It is formed integrally with a protrusion provided in the upper center of the main body, and the magnetic bar is attached to the protrusion from the leveling valve side.
While introducing air to the valve side,
Air inlet / outlet port that returns air to the leveling valve side,
Supply air from the magnetic valve side to the air spring side.
While supplying, magnetic valve from the air spring side
A cab mount device having an air inlet / outlet port for returning air to the side . 2. A leveling valve and a magnetic valve
Is integrally formed by casting.
Cab mount device for vehicle.