JP2023067293A - Shovel - Google Patents

Abstract

To provide a shovel that improves workability.SOLUTION: A shovel includes a lower traveling body, an upper revolving body capable of turning with respect to the lower traveling body, a cabin provided in the upper revolving body, and a driver's seat provided in the cabin and provided with a pair of left and right consoles and a height adjustment mechanism for the pair of left and right consoles. The height adjustment mechanism is capable of interlocking and adjusting the heights of both of the pair of left and right consoles, and can be adjusted step by step.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to excavators.

Patent Document 1 discloses a console box having an operation lever and movably supported by a cab, an armrest movably supported by the cab independently of the console box, and an armrest interlocking with the movement of the console box. and a moving mechanism for moving the armrest.

JP 2016-37704 A

By the way, in conventional consoles, it was necessary to adjust the height independently on the left and right sides.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an excavator that facilitates adjustment of the console and improves workability.

An excavator according to an embodiment of the present invention includes a lower traveling body, an upper revolving body capable of turning with respect to the lower traveling body, a cabin provided in the upper revolving body, a pair of left and right consoles provided in the cabin, and a driver's seat having a height adjustment mechanism for the pair of left and right consoles, wherein the height adjustment mechanism is capable of adjusting heights of both the pair of left and right consoles in conjunction with each other, and stepwise Adjustable.

ADVANTAGE OF THE INVENTION According to this invention, the excavator which improves workability can be provided.

1 is a side view of a shovel according to an embodiment of the present invention; FIG. It is a perspective view of the driver's seat unit arranged in the cabin. It is a perspective view of a console frame. FIG. 10 is a side view showing a state in which the lock pin is engaged with the lowermost groove of the lock plate; FIG. 11 is a side view showing a state in which engagement between the lowermost groove of the lock plate and the lock pin is released; FIG. 11 is a side view showing a state in which the console adjustment lever is pulled up in an unlocked state; FIG. 11 is a side view showing a state in which the lock pin is engaged with the uppermost groove of the lock plate; FIG. 4 is a schematic diagram for explaining the operation of linking console frames;

Hereinafter, embodiments will be described with reference to the drawings. In each drawing, the same constituent elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

FIG. 1 is a side view of a shovel 10 as an excavator according to one embodiment of the present invention.

In the following description, the X-axis direction, Y-axis direction, and Z-axis direction are directions perpendicular to each other. Typically, the X-axis direction and Y-axis direction are horizontal directions, and the Z-axis direction is vertical direction. The X-axis direction is the front-rear direction of the shovel 10, with the front side being the +X direction and the rear side being the -X direction. The Y-axis direction is the lateral width direction of the excavator 10, with the left side being the +Y direction and the right side being the -Y direction. The Z-axis direction is the height direction of the excavator 10, with the upper side being the +Z direction and the lower side being the -Z direction.

The excavator 10 has an upper revolving body 13 that is rotatably mounted on a lower traveling body 11 via a revolving mechanism 12 . The upper revolving body 13 is provided with a cabin 14 at one front side portion thereof, and a boom 15 is attached to the front center portion so as to be able to be raised. An arm 16 is attached to the tip of the boom 15 so as to be vertically rotatable, and a bucket 17 is attached to the tip of the arm 16 .

<Driver's seat unit>
Next, the driver's seat unit 20 arranged inside the cabin 14 will be described with reference to FIG. FIG. 2 is a perspective view of the driver's seat unit 20 arranged in the cabin 14. As shown in FIG.

The driver's seat unit 20 includes a seat 21 , a console frame 22 , a pair of left and right operation levers 23 and 24 , armrests 25 and 26 , a suspension 27 and a base 28 .

The seat 21 is a device on which the operator sits when operating the excavator 10 . The seat 21 has a seat surface 21a, a back surface 21b, and a headrest 21c.

Between the seat 21 and a bracket 41 (see FIG. 3 described later) of the console frame 22, a seat longitudinal position adjusting mechanism (X direction) for adjusting the position of the seat 21 in the longitudinal direction (X direction) with respect to the console frame 22 is provided. (not shown) and a seat longitudinal adjustment lever 33 for operating the seat longitudinal position adjusting mechanism. The operator can adjust the position of the seat 21 in the front-rear direction (X direction) by operating the seat front-rear adjustment lever 33 . In other words, the seat longitudinal position adjustment mechanism can adjust the relative positional relationship in the longitudinal direction (X direction) between the seat 21 and the operation levers 23 and 24 supported by the console frame 22 .

Between the bracket 41 (see FIG. 3 described later) of the console frame 22 and the suspension 27, an integral front-rear position adjustment mechanism ( (not shown) and an integrated front-rear adjustment lever 34 for operating the integrated front-rear position adjustment mechanism. By operating the integrated front-rear adjustment lever 34, the operator can adjust the position of the seat 21 and the console frame 22 together in the front-rear direction (X direction).

A seat angle adjustment mechanism (not shown) for adjusting the tilt angle of the seat 21 and a seat angle adjustment mechanism are operated between the seat 21 and the bracket 41 (see FIG. 3, which will be described later) of the console frame 22. A seat angle adjustment lever 35 is provided for this purpose. By operating the seat angle adjustment lever 35, the operator can adjust the tilt angle (forward tilt, rearward tilt) of the seat 21. FIG.

The console frame 22 supports operating levers 23 and 24 and armrests 25 and 26 . The console frame 22 also has a height adjustment mechanism for adjusting the heights of the operation levers 23 and 24 . In other words, the console frame 22 (height adjustment mechanism) can adjust the relative positional relationship in the height direction (Z direction) between the seat 21 and the operation levers 23 and 24 . Further, the console frame 22 (height adjustment mechanism) can be tilted in the tilt angle (forward tilt, backward tilt) direction of the operation levers 23 and 24 as well as height adjustment of the operation levers 23 and 24 .

In addition, the console frame 22 (height adjustment mechanism) locks the console adjustment lever 31, which can be adjusted by interlocking the heights of both the operation levers 23 and 24, and the heights of both the operation levers 23 and 24. A lock lever 32 is provided. Also, the console adjustment lever 31 and the lock lever 32 are arranged close to each other. A height adjustment mechanism for the console frame 22 will be described later with reference to FIGS. 3 and 4. FIG.

The operation levers 23 and 24 are operation levers for operating the boom 15 up and down, the arm 16 opening and closing, the bucket 17 opening and closing, and the upper swing body 13 swinging.

The armrests 25 and 26 are devices for placing the elbows of the operator seated on the seat 21 when operating the operating levers 23 and 24 .

The console frame 22 also includes an armrest height adjustment mechanism 71 for adjusting the height of the armrests 25 and 26, an armrest flip-up mechanism 72 for flipping up the armrests 25 and 26 rearward, the armrests 25, 26 and an armrest rotation mechanism 73 capable of rotating. The armrest height adjustment mechanism 71 can adjust the relative positional relationship in the height direction (Z direction) between the operation levers 23 and 24 and the armrests 25 and 26 . The armrest height adjustment mechanism 71 has, for example, a tubular member, a shaft member that can be inserted into and removed from the tubular member, and a fixing member that fixes the shaft member to the tubular member. The armrest height adjustment mechanism 71 adjusts the height of the armrests 25 and 26 by inserting and withdrawing the shaft member into and out of the cylindrical member, and fixes the armrests 25 and 26 at the position where the height of the armrests 25 and 26 is adjusted by the fixing member. can be done. The armrest rotation mechanism 73 is provided between the armrest height adjustment mechanism 71 and the armrests 25 and 26 . The armrest rotation mechanism 73 rotates about 90° from the position where the armrests 25 and 26 are used (see FIGS. 1 to 4D) so that the tip sides of the armrests 25 and 26 face upward. can be rotated. Thereby, the armrests 25 and 26 can be rotated by the armrest rotation mechanism 73 when the armrests 25 and 26 are not used. Further, the armrest flip-up mechanism 72 is provided between the armrest height adjustment mechanism 71 and the console links 51L, 51R (see FIG. 3). The armrest flip-up mechanism 72 can rotate the armrests 25 and 26, the armrest rotation mechanism 73, and the armrest height adjustment mechanism 71 toward the rear of the seat 21 with the horizontal direction (Y direction) as the rotation axis. Accordingly, when the armrests 25 and 26 are not used, the armrest flip-up mechanism 72 can retract the armrests 25 and 26 toward the back surface 21 b of the seat 21 .

The suspension 27 is fixed to the base 28 at its lower portion and elastically supports the seat 21 and the console frame 22 at its upper portion. The base 28 is installed on the floor of the cabin 14 with a fixing member 29 . As a result, it is possible to suppress the vibration of the excavator 10 and the like from being transmitted to the operator seated on the seat 21 .

<Console frame (height adjustment mechanism)>
Next, the console frame 22 having a height adjusting mechanism for the operating levers 23, 24 will be further described with reference to FIG. 3 is a perspective view of the console frame 22. FIG.

The console frame 22 includes a bracket 41 , a first interlocking shaft 42 , a second interlocking shaft 43 , a right link mechanism 50R, a left link mechanism 50L, and a lock mechanism 60 .

The bracket 41 is a frame made of a metal frame. The bracket 41 is fixed to the suspension 27 at its lower side and fixed to the seat 21 at its upper side.

The first interlocking shaft 42 is rotatably supported with respect to the bracket 41 with the left-right direction (Y direction) as its longitudinal direction. One end (right end) of the first interlocking shaft 42 is fixed to the first link 52R of the right link mechanism 50R. Similarly, the other end (left end) of the first interlocking shaft 42 is fixed to the third link 52L of the left link mechanism 50L.

The second interlocking shaft 43 is rotatably supported with respect to the bracket 41 with the left-right direction (Y direction) as its longitudinal direction. One end (right end) of the second interlocking shaft 43 is fixed to the second link 53R of the right link mechanism 50R. Similarly, the other end (left end) of the second interlocking shaft 43 is fixed to the fourth link (not shown) of the left link mechanism 50L.

The right link mechanism 50R includes a right console link 51R, a first link 52R, a second link 53R, and a biasing member 54R.

The first link 52R has an inner surface (+Y side surface) to which the first interlocking shaft 42 is fixed, and an outer surface (−Y side surface) is formed with a shaft 52Ra. When viewed from the side (in the Y direction), the first link 52R is provided rotatably with respect to the bracket 41 with the first interlocking shaft 42 as the rotation axis. When viewed from the side (in the Y direction), the first interlocking shaft 42 and the shaft 52Ra are separated from each other, and the distance between the central axis of the first interlocking shaft 42 and the central axis of the shaft 52Ra is equal to that of the first link. Configure a link length of 52R.

The second link 53R has an inner surface (+Y side surface) to which the second interlocking shaft 43 is fixed, and an outer surface (−Y side surface) is formed with a shaft 53Rb. When viewed from the side (in the Y direction), the second link 53R is rotatably provided with respect to the bracket 41 with the second interlocking shaft 43 as the rotation axis. In addition, when viewed from the side (in the Y direction), the second interlocking shaft 43 and the shaft 53Rb are separated from each other, and the distance between the central axis of the second interlocking shaft 43 and the central axis of the shaft 53Rb is equal to that of the second link. Configure a link length of 53R.

The right console link 51R has a bearing 51Ra and a bearing 51Rb. By inserting the shaft 52Ra into the bearing 51Ra, the first link 52R rotatably supports the right console link 51R. By inserting the shaft 53Rb through the bearing 51Rb, the second link 53R rotatably supports the right console link 51R. When viewed from the side (in the Y direction), the bearing 51Ra and the bearing 51Rb are separated from each other, and the distance between the central axis of the bearing 51Ra (shaft 52Ra) and the central axis of the bearing 51Rb (shaft 53Rb) is Configure the link length of the console link 51R.

In this way, the right link mechanism 50R is configured by the first interlocking shaft 42 and the second interlocking shaft 43 supported by the bracket 41, the right console link 51R, the first link 52R, and the second link 53R. 1 four-bar link mechanism is constructed.

The urging member 54R (see FIG. 4A) is composed of, for example, a tension spring, and has a hook at one end (rear end) locked to a locking pin 41Rc provided on the bracket 41, and a hook at the other end (front end). It is locked by a locking pin 52Rc provided on the first link 52R, and biases the first link 52R in a counterclockwise rotation direction when viewed from the right side. In other words, the biasing member 54R biases the first link 52R, which rotates about the first interlocking shaft 42 as a rotation axis, in a direction in which the shaft 52Ra rises in height. In other words, the biasing member 54R biases the first link 52R in the direction of rotation when the console adjustment lever 31 is lifted.

An operation lever mount 55R is provided on the right console link 51R. The right operating lever 23 is attached to the operating lever mount 55R. The operation lever mount 55R has a through hole formed in the mounting surface to which the operation lever 23 is mounted, and a nut (see FIG. 4A) is welded and fixed to the back side of the mounting surface at a position communicating with the through hole. As a result, the operating lever 23 is mounted on the operating lever mount 55R by placing the operating lever 23 on the mounting surface of the operating lever mount 55R, inserting the bolt into the mounting hole of the operating lever 23, and screwing it with the nut. can be done. Also, the armrest 25 is supported by the right console link 51</b>R via an armrest height adjustment mechanism 71 , an armrest flip-up mechanism 72 and an armrest rotation mechanism 73 .

Similarly, the left link mechanism 50L includes a left console link 51L, a third link 52L, a fourth link (not shown), and a biasing member 54L. The biasing member 54L is composed of, for example, a tension spring, and has a hook at one end (rear end) engaged with a locking pin 41Lc provided on the bracket 41, and a hook at the other end (front end) provided on the third link 52L. The third link 52L is locked by the locking pin 52Lc, and is biased in a direction to rotate the third link 52L counterclockwise when viewed from the right side. The left console link 51L, third link 52L and fourth link (not shown) and biasing member 54L of the left link mechanism 50L are connected to the right console link 51R, first link 52R and second link of the right link mechanism 50R. It is similar to 53R and biasing member 54R, and redundant description will be omitted. Thus, the left link mechanism 50L includes the first interlocking shaft 42 and the second interlocking shaft 43 supported by the bracket 41, the left console link 51L, the third link 52L, and the fourth link (not shown). , constitute a second four-bar link mechanism.

An operation lever mount 55L is provided on the left console link 51L. The left operating lever 24 is attached to the operating lever mount 55L. Also, the armrest 26 is supported by the left console link 51</b>L via an armrest height adjustment mechanism 71 , an armrest flip-up mechanism 72 and an armrest rotation mechanism 73 .

A console adjustment lever 31 is fixed to the first link 52R of the right link mechanism 50R. Accordingly, by operating the console adjustment lever 31, the operator can rotate the first link 52R with the first interlocking shaft 42 as the rotation axis. In addition, the first link 52R of the right link mechanism 50R and the third link 52L of the left link mechanism 50L are fixed via the first interlocking shaft 42, and the first link 52R rotates about the first interlocking shaft 42 as the rotation axis. is rotated, the third link 52L is also rotated with the first interlocking shaft 42 as the rotation axis. That is, by operating the console adjustment lever 31, the four-bar link mechanism of the right link mechanism 50R and the four-bar link mechanism of the left link mechanism 50L can be operated simultaneously.

The lock mechanism 60 is a device for locking the rotation of the first link 52R at a predetermined angle. The lock mechanism 60 has a lock lever plate 61 , a lock pin 62 and a lock plate 63 .

The lock lever plate 61 is rotatably supported with respect to the first link 52R with the shaft 61a as the rotation axis. A lock pin 62 is erected on the lock lever plate 61 . A lock lever 32 is fixed to the lock lever plate 61 . Accordingly, when the operator operates the lock lever 32, the lock lever plate 61 can be rotated with the shaft 61a as the rotation axis.

Lock plate 63 is fixed to bracket 41 . The lock plate 63 is formed with a plurality of lock grooves 63a to 63d (see FIG. 4A) that engage with the lock pins 62. As shown in FIG.

A biasing member (not shown) is provided between the lock lever plate 61 and the first link 52</b>R to bias the lock lever plate 61 in the direction of pressing the lock pin 62 against the lock plate 63 . Accordingly, when the operator releases the lock lever 32 , the lock pin 62 engages with one of the lock grooves 63 a to 63 d of the lock plate 63 .

<Console height adjustment>
Next, an example of height adjustment of the operating levers 23 and 24 will be described with reference to FIGS. 4A to 4D. Here, an example will be described in which the lock pin 62 is engaged with the lock groove 63 d at the top of the lock plate 63 after the lock pin 62 is engaged with the lock groove 63 a at the bottom of the lock plate 63 .

4A is a side view showing a state in which the lock pin 62 is engaged with the lowermost lock groove 63a of the lock plate 63. FIG. By engaging the lock pin 62 with the lock groove 63a of the lock plate 63, the rotation of the first link 52R is fixed (locked). Thereby, the heights of the operating levers 23 and 24 are fixed (locked). Further, as shown in FIG. 4A, the mounting surface (see the two-dot chain line) of the operating lever mount 55R to which the operating lever 23 is attached is arranged to be tilted forward.

FIG. 4B is a side view showing a state in which engagement between the lowermost lock groove 63a of the lock plate 63 and the lock pin 62 is released. The operator pulls up the lock lever 32. In other words, the operator operates the lock lever 32 in a direction to bring it closer to the console adjustment lever 31 . By this operation, the lock lever plate 61 rotates with respect to the first link 52R with the shaft 61a as the rotation axis. As a result, the lock pin 62 is removed from the lock groove 63 a of the lock plate 63 . That is, the first link 52R becomes rotatable, and the console adjustment lever 31 becomes operable (unlocked).

FIG. 4C is a side view showing a state in which the console adjustment lever 31 is pulled up in an unlocked state. The operator pulls up the console adjustment lever 31 while pulling up the lock lever 32 . At this time, the force for pulling up the console adjustment lever 31 is assisted by the biasing members 54R and 54L. That is, the biasing members 54R and 54L assist the operator in raising the height of the operating levers 23 and 24. FIG. As a result, the left and right console links 51L, 51R and the members supported by the left and right console links 51L, 51R (the operation levers 23, 24, the armrests 25, 26, the armrest height adjustment mechanism 71, the armrest flip-up mechanism 72, and the armrest rotation By supporting the weight of the mechanism 73) with the urging members 54R and 54L, the operating force required to pull up the console adjustment lever 31 can be reduced. Also, since the console adjustment lever 31 and the lock lever 32 are arranged close to each other, the operator can operate the console adjustment lever 31 and the lock lever 32 with one hand.

4D is a side view showing a state in which the lock pin 62 is engaged with the uppermost lock groove 63d of the lock plate 63. FIG. When the operator releases the lock lever 32, the lock pin 62 is biased toward the lock plate 63 by a biasing member (not shown), and the lock pin 62 is engaged with the lock groove 63d. Thereby, the rotation of the first link 52R is fixed (locked).

By the above operation, the mounting surface (see two-dot chain line) of the operating lever mount 55R is arranged at a high position as shown in FIG. 4A and FIG. 4D in comparison. Also, the tilt angle of the operating lever mount 55R approaches the horizontal.

Thus, the height of the right operation lever 23 can be adjusted by the four-bar link mechanism of the right link mechanism 50R. A first interlocking shaft 42 connects the first link 52R of the right link mechanism 50R and the third link 52L of the left link mechanism 50L. Accordingly, when the console adjustment lever 31 is operated to rotate the first link 52R of the right link mechanism 50R, the third link 52L of the left link mechanism 50L is also rotated. Thereby, the height of the left operation lever 24 can be adjusted by the four-bar link mechanism of the left link mechanism 50L. That is, the console frame 22 (height adjustment mechanism) can adjust the height of the left and right operation levers 23 and 24 in conjunction with each other.

Further, the console frame 22 (height adjustment mechanism) can adjust the heights of the operation levers 23 and 24 stepwise by means of the lock mechanism 60 . That is, the console frame 22 shown in FIGS. 3 to 4D has a state in which the lock pin 62 is engaged with the lock groove 63a (see FIG. 4A), a state in which the lock pin 62 is engaged with the lock groove 63b (not shown), The heights of the operating levers 23 and 24 are changed stepwise in four stages: a state in which the lock pin 62 is engaged with the lock groove 63c (not shown) and a state in which the lock pin 62 is engaged with the lock groove 63d (see FIG. 4D). can be adjusted.

For example, the operator adjusts the height and tilt angle of the operating levers 23 and 24 depending on the work content. For example, in the case of excavating a road surface, the height and tilt angle of the operating levers 23 and 24 are adjusted so that the operating levers 23 and 24 and the armrests 25 and 26 are tilted forward. On the other hand, in the case of work such as excavating upward, the height and tilt angle of the operating levers 23 and 24 are adjusted so that the operating levers 23 and 24 and the armrests 25 and 26 are tilted backward. Also, when the operator changes, the height and tilt angle of the operating levers 23 and 24 are adjusted according to the body shape of the operator.

According to the console frame 22 (height adjustment mechanism), the heights of the left and right operation levers 23 and 24 can be interlocked and adjusted. Since the thickness can be adjusted, the workability of the adjustment work is improved. In addition, by making the heights of the left and right operating levers 23 and 24 adjustable in steps, it is possible to change the height of the operating levers 23 and 24 and then change them back to the original height. Even if there is, the height can be easily adjusted with good reproducibility.

The console frame 22 can change the operation of the operating levers 23 and 24 by changing the link length of the four-bar link mechanism. 5A and 5B are schematic diagrams for explaining the operation of the link of the console frame 22. FIG.

5A and 5B are schematic diagrams showing an example of a four-bar link mechanism. In the configuration of the four-bar link mechanism shown in FIGS. 5A and 5B, the height and tilt angle of the operating levers 23 and 24 can be adjusted.

5(C) and 5(D) are schematic diagrams showing another example of the four-bar link mechanism. In the configuration of the four-bar link mechanism shown in FIGS. 5(C) and 5(D), only the heights of the operating levers 23 and 24 can be adjusted.

Thus, by changing the link length of the right console link 51R, the link length of the first link 52R, the link length of the second link 53R, and the distance between the first interlocking shaft 42 and the second interlocking shaft 43, the console frame 22 behavior can be changed.

Also, although the lock mechanism 60 has been described as having four lock grooves 63a to 63d in the lock plate 63, it is not limited to this, and the number of steps and the adjustment width may be changed as appropriate.

As described above, the driver's seat unit 20 can determine the longitudinal position of the seat 21 in the cabin 14, the tilt angle of the seat 21, the longitudinal positions of the operating levers 23 and 24 relative to the seat 21, and the positions of the operating levers 23 and 24 relative to the seat 21. Height position (and tilt angle) can be adjusted. As a result, the operator can take a suitable driving posture, and fatigue of the operator can be reduced.

REFERENCE SIGNS LIST 10 excavator 11 lower running body 12 swing mechanism 13 upper swing body 14 cabin 15 boom 16 arm 17 bucket 20 driver's seat unit 21 seat 22 console frame (height adjustment mechanism)
23, 24 Operation levers 25, 26 Armrest 27 Suspension 28 Base 31 Console adjustment lever (adjustment lever)
32 Lock lever 33 Seat fore-and-aft adjustment lever 34 Integrated fore-and-aft adjustment lever 35 Seat angle adjustment lever 41 Bracket 42 First interlocking shaft 43 Second interlocking shaft 50R Right link mechanism 50L Left link mechanism 51R Right console link 51L Left console link 52R First link 53R Second links 54L, 54R Biasing members 55L, 55R Operation lever mount 60 Lock mechanism 61 Lock lever plate 62 Lock pin 63 Lock plates 63a to 63d Lock groove 71 Armrest height adjustment mechanism 72 Armrest flip-up mechanism

Claims (8)

a lower running body;
an upper rotating body capable of rotating with respect to the lower traveling body;
a cabin provided in the upper revolving body;
A driver's seat provided in the cabin and provided with a pair of left and right consoles and a height adjustment mechanism for the pair of left and right consoles,
The height adjustment mechanism is capable of interlocking and adjusting the heights of both of the pair of left and right consoles, and is adjustable step by step.
Excavator. The height adjustment mechanism has a four-bar link mechanism,
Shovel according to claim 1 . The height adjustment mechanism is
a bracket;
a first interlocking shaft rotatably supported with respect to the bracket;
a second interlocking shaft rotatably supported with respect to the bracket;
a right console link to which the right console of the pair of left and right consoles is fixed;
a first link fixed to the first interlocking shaft and rotatably supporting the right console link;
a second link fixed to the second interlocking shaft and rotatably supporting the right console link;
a left console link to which the left console of the pair of left and right consoles is fixed;
a third link fixed to the first interlocking shaft and rotatably supporting the left console link;
a fourth link fixed to the second interlocking shaft and rotatably supporting the left console link;
The first interlocking shaft, the first link, the right console link, the second link, and the second interlocking shaft constitute a first four-bar link mechanism,
The first interlocking shaft, the third link, the left console link, the fourth link, and the second interlocking shaft constitute a second four-bar link mechanism,
Shovel according to claim 2. The height adjustment mechanism has a plurality of lock grooves and a lock pin that engages with the lock grooves.
The excavator according to any one of claims 1 to 3. The height adjustment mechanism has a biasing member that assists an operation when raising the height of the pair of left and right consoles.
The excavator according to any one of claims 1 to 4. The driver's seat further comprises an armrest and a height adjustment mechanism for the armrest,
The excavator according to any one of claims 1 to 5. The height adjustment mechanism is
an adjustment lever capable of interlocking and adjusting the heights of both of the pair of left and right consoles;
a lock lever that locks the height of both of the pair of left and right consoles;
A shovel according to any one of claims 1 to 6. the adjusting lever and the locking lever are arranged in close proximity;
Shovel according to claim 7.

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