Excavator

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

Technical Field

[0001] The present disclosure relates to a shovel.

Background Art

[0002] Patent Document 1 discloses a construction machine having an operation lever, a console box movably supported in a cab, an armrest movably supported in the cab independently of the console box, and a moving mechanism for moving the armrest in conjunction with the movement of the console box.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the conventional console needed to be adjusted in height independently on the left and right.

[0005] Therefore, an object of the present invention is to provide a shovel that improves workability for easy adjustment of a console.

Means for Solving the Problems

[0006] A shovel according to an embodiment of the present invention includes a lower traveling body, an upper swing body swingable with respect to the lower traveling body, a cab provided on the upper swing body, and a driver's seat provided in the cab and including a pair of left and right consoles and a height adjustment mechanism for the pair of left and right consoles. The height adjustment mechanism A pair of left and right link mechanisms provided on each of the pair of left and right consoles, and the pair of left and right link mechanisms are interlocked, interlocks the heights of both of the pair of left and right consoles It has an interlocking shaft, a lock pin, and a plurality of lock grooves. By engaging the lock pin with any one of the lock grooves, the heights of both of the pair of left and right consoles are and adjusts them stepwise A lock mechanism for doing so, and the lock mechanism is a first link among a plurality of links constituting one of the pair of left and right link mechanisms, and locks the rotation of the first link fixed to the interlocking shaft .

Effects of the Invention

[0007] According to the present invention, an excavator that improves workability can be provided.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4A

Figure 4B

Figure 4C

Figure 4D

Figure 5

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings. The same components in each drawing are denoted by the same reference numerals, and redundant explanations are omitted.

[0010] FIG. 1 is a side view of an excavator 10 as an excavating machine according to an embodiment of the present invention.

[0011] In the following description, the X-axis direction, Y-axis direction, and Z-axis direction are perpendicular to each other. Typically, the X-axis direction and Y-axis direction are horizontal directions, and the Z-axis direction is the vertical direction. The X-axis direction is the front-rear direction of the excavator 10, with the front side being the +X direction and the rear side being the -X direction. The Y-axis direction is the left-right 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.

[0012] The upper swing body 13 of the excavator 10 is rotatably mounted on the lower traveling body 11 via a slewing mechanism 12. A cab 14 is provided on one front side of the upper swing body 13, and a boom 15 is pivotally attached to the front central part. Further, an arm 16 is rotatably attached to the tip of the boom 15, and a bucket 17 is attached to the tip of the arm 16.

[0013] <Driver's seat unit> Next, the driver's seat unit 20 disposed in the cab 14 will be described with reference to FIG. 2. FIG. 2 is a perspective view of the driver's seat unit 20 disposed in the cab 14.

[0014] The driver's seat unit 20 includes a seat 21, a console frame 22, a pair of left and right operation levers 23, 24, armrests 25, 26, a suspension 27, and a base 28.

[0015] The seat 21 is a device for the operator to sit on when operating the excavator 10. The seat 21 has a seat surface 21a, a backrest 21b, and a headrest 21c.

[0016] Also, between the seat 21 and the bracket 41 of the console frame 22 (see FIG. 3 described later), there are provided a seat front-rear position adjustment mechanism (not shown) for adjusting the front-rear position (X direction) of the seat 21 with respect to the console frame 22, and a seat front-rear adjustment lever 33 for operating the seat front-rear position adjustment mechanism. By the operator operating the seat front-rear adjustment lever 33, the front-rear position (X direction) of the seat 21 can be adjusted. In other words, the seat front-rear position adjustment mechanism can adjust the relative front-rear position relationship (X direction) among the seat 21, the operation levers 23 and 24 supported by the console frame 22.

[0017] Also, between the bracket 41 of the console frame 22 (see FIG. 3 described later) and the suspension 27, there are provided an integral front-rear position adjustment mechanism (not shown) for adjusting the front-rear position (X direction) of the seat 21 and the console frame 22 integrally, and an integral front-rear adjustment lever 34 for operating the integral front-rear position adjustment mechanism. By the operator operating the integral front-rear adjustment lever 34, the front-rear position (X direction) of the seat 21 and the console frame 22 can be adjusted integrally.

[0018] Also, between the seat 21 and the bracket 41 of the console frame 22 (see FIG. 3 described later), there are provided a seat angle adjustment mechanism (not shown) for adjusting the tilt angle of the seat 21, and a seat angle adjustment lever 35 for operating the seat angle adjustment mechanism. By the operator operating the seat angle adjustment lever 35, the tilt angle (forward tilt, rearward tilt) of the seat 21 can be adjusted.

[0019] The console frame 22 supports the operation levers 23, 24 and the armrests 25, 26. Further, the console frame 22 is provided with a height adjustment mechanism for adjusting the height of the operation levers 23, 24. In other words, the console frame 22 (height adjustment mechanism) can adjust the positional relationship in the relative height direction (Z direction) between the seat 21 and the operation levers 23, 24. Further, the console frame 22 (height adjustment mechanism) can tilt the operation levers 23, 24 in the tilt angle (forward tilt, backward tilt) direction along with the height adjustment of the operation levers 23, 24.

[0020] Further, the console frame 22 (height adjustment mechanism) is provided with a console adjustment lever 31 for adjusting the heights of both the operation levers 23, 24 in conjunction with each other, and a lock lever 32 for locking the heights of both the operation levers 23, 24. Further, the console adjustment lever 31 and the lock lever 32 are arranged in proximity to each other. Note that the height adjustment mechanism of the console frame 22 will be described later with reference to FIGS. 3 and 4.

[0021] The operation levers 23, 24 are operation levers for operating the up and down movement of the boom 15, the opening and closing of the arm 16, the opening and closing of the bucket 17, and the turning of the upper swing body 13.

[0022] The armrests 25, 26 are devices for placing the elbows of the operator when the operator seated on the seat 21 operates the operation levers 23, 24.

[0023] In addition, the console frame 22 is provided with an armrest height adjustment mechanism 71 for adjusting the heights of the armrests 25 and 26, an armrest flipping-up mechanism 72 for flipping up the armrests 25 and 26 rearward, and an armrest rotation mechanism 73 for rotating the armrests 25 and 26. 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 cylindrical member, a shaft member that can be inserted into and removed from the cylindrical member, and a fixing member for fixing the shaft member to the cylindrical member. The armrest height adjustment mechanism 71 can adjust the height of the armrests 25 and 26 by inserting and removing the shaft member with respect to the cylindrical member, and can fix the height of the armrests 25 and 26 at the adjusted position with the fixing member. 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 uses the left-right direction (Y direction) as the rotation axis and can rotate the armrests 25 and 26 by approximately 90° so that the tip sides of the armrests 25 and 26 face upward from the positions where the armrests 25 and 26 are used (see FIGS. 1 to 4D). Thereby, when the armrests 25 and 26 are not used, the armrest rotation mechanism 73 can rotate the armrests 25 and 26. Further, the armrest flipping-up mechanism 72 is provided between the armrest height adjustment mechanism 71 and the console links 51L and 51R (see FIG. 3). The armrest flipping-up mechanism 72 uses the left-right direction (Y direction) as the rotation axis and 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. Thereby, when the armrests 25 and 26 are not used, the armrest flipping-up mechanism 72 can retract the armrests 25 and 26 to the side of the rear surface 21b of the seat 21.

[0024] The suspension 27 is fixed to the base 28 at the lower part and elastically supports the seat 21 and the console frame 22 at the upper part. The base 28 is installed on the floor surface of the cabin 14 by the fixing member 29. Thereby, it is possible to suppress the transmission of vibrations of the excavator 10 or the like to the operator sitting on the seat 21.

[0025] <Console frame (height adjustment mechanism)> Next, the console frame 22 having a height adjustment mechanism for the operation levers 23 and 24 will be further described with reference to FIG. 3. FIG. 3 is a perspective view of the console frame 22.

[0026] 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.

[0027] The bracket 41 is a frame formed of a metal frame. The bracket 41 is fixed to the suspension 27 at the lower part and fixed to the seat 21 at the upper part.

[0028] The first interlocking shaft 42 is rotatably supported with respect to the bracket 41 with the longitudinal direction in the left - right direction (Y - 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.

[0029] The second interlocking shaft 43 is rotatably supported with respect to the bracket 41 with the longitudinal direction in the left - right direction (Y - 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.

[0030] The right link mechanism 50R includes a right console link 51R, a first link 52R, a second link 53R, and a biasing member 54R.

[0031] The first link 52R has a first interlocking shaft 42 fixed to its inner surface (+Y side surface) and a shaft 52Ra formed on its outer surface (-Y side surface). Also, when viewed in side view (looking in the Y direction), the first link 52R is provided rotatably with respect to the bracket 41 about the first interlocking shaft 42 as a rotation axis. Also, when viewed in side view (looking in the Y direction), the first interlocking shaft 42 and the shaft 52Ra are spaced apart, and the distance between the central axis of the first interlocking shaft 42 and the central axis of the shaft 52Ra constitutes the link length of the first link 52R.

[0032] The second link 53R has a second interlocking shaft 43 fixed to its inner surface (+Y side surface) and a shaft 53Rb formed on its outer surface (-Y side surface). Also, when viewed in side view (looking in the Y direction), the second link 53R is provided rotatably with respect to the bracket 41 about the second interlocking shaft 43 as a rotation axis. Also, when viewed in side view (looking in the Y direction), the second interlocking shaft 43 and the shaft 53Rb are spaced apart, and the distance between the central axis of the second interlocking shaft 43 and the central axis of the shaft 53Rb constitutes the link length of the second link 53R.

[0033] 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 into the bearing 51Rb, the second link 53R rotatably supports the right console link 51R. Also, when viewed in side view (looking in the Y direction), the bearing 51Ra and the bearing 51Rb are spaced apart, and the distance between the central axis of the bearing 51Ra (shaft 52Ra) and the central axis of the bearing 51Rb (shaft 53Rb) constitutes the link length of the right console link 51R.

[0034] In this way, the right link mechanism 50R is composed of a first four-bar link mechanism 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.

[0035] The biasing member 54R (see Fig. 4A) is composed of, for example, a tension spring. The hook at one end (the rear end) is engaged with a locking pin 41Rc provided on the bracket 41, and the hook at the other end (the front end) is engaged with a locking pin 52Rc provided on the first link 52R, biasing the first link 52R in a direction of rotating counterclockwise when viewed from the right side. In other words, the biasing member 54R biases the first link 52R in a direction in which the first link 52R rotates such that the height of the shaft 52Ra increases in the first link 52R that rotates about the first interlocking shaft 42 as the rotation axis. Stated more specifically, the biasing member 54R biases the first link 52R in a direction in which the first link 52R rotates when the console adjustment lever 31 is lifted.

[0036] In addition, an operation lever mount 55R is provided on the right console link 51R. The right operation lever 23 is attached to the operation lever mount 55R. The operation lever mount 55R has a through hole formed in the mounting surface to which the operation lever 23 is attached, and a nut (see Fig. 4A) is welded and fixed at a position communicating with the through hole on the back side of the mounting surface. Thereby, the operation lever 23 can be attached to the operation lever mount 55R by placing the operation lever 23 on the mounting surface of the operation lever mount 55R, inserting a bolt through the mounting hole of the operation lever 23, and screwing it with the nut. Further, the armrest 25 is supported by the right console link 51R via an armrest height adjustment mechanism 71, an armrest flip-up mechanism 72, and an armrest rotation mechanism 73.

[0037] 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 constituted by, for example, a tension spring. A hook at one end (rear end) is locked to a locking pin 41Lc provided on the bracket 41, and a hook at the other end (front end) is locked to a locking pin 52Lc provided on the third link 52L, biasing the third link 52L in a direction to rotate counterclockwise when viewed from the right side. The left console link 51L, the third link 52L, the fourth link (not shown), and the biasing member 54L of the left link mechanism 50L are the same as the right console link 51R, the first link 52R, the second link 53R, and the biasing member 54R of the right link mechanism 50R, and redundant descriptions are omitted. Thus, the left link mechanism 50L constitutes a second four-bar link mechanism by a first interlocking shaft 42 and a second interlocking shaft 43 supported by the bracket 41, the left console link 51L, the third link 52L, and the fourth link (not shown).

[0038] An operation lever mount 55L is provided on the left console link 51L. The left operation lever 24 is attached to the operation lever mount 55L. Further, the armrest 26 is supported by the left console link 51L via an armrest height adjustment mechanism 71, an armrest flip-up mechanism 72, and an armrest rotation mechanism 73.

[0039] A console adjustment lever 31 is fixed to the first link 52R of the right link mechanism 50R. Thereby, by the operator operating the console adjustment lever 31, the first link 52R can be rotated with the first interlocking shaft 42 as the rotation axis. Further, 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. By rotating the first link 52R with the first interlocking shaft 42 as the rotation axis, the third link 52L also rotates 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.

[0040] The locking mechanism 60 is a device for locking the rotation of the first link 52R at a predetermined angle. The locking mechanism 60 includes a lock lever plate 61, a lock pin 62, and a lock plate 63.

[0041] The lock lever plate 61 is rotatably supported with respect to the first link 52R using the shaft 61a as a 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. Thus, by the operator operating the lock lever 32, the lock lever plate 61 can be rotated using the shaft 61a as a rotation axis.

[0042] The lock plate 63 is fixed to the bracket 41. A plurality of lock grooves 63a to 63d (see FIG. 4A) that engage with the lock pin 62 are formed in the lock plate 63.

[0043] Also, a biasing member (not shown) is provided between the lock lever plate 61 and the first link 52R, and biases the lock lever plate 61 in a direction to press the lock pin 62 against the lock plate 63. Thus, when the operator releases the lock lever 32, the lock pin 62 engages with one of the lock grooves 63a to 63d of the lock plate 63.

[0044] <Height adjustment of the console> Next, an example of the height adjustment of the operation levers 23 and 24 will be described with reference to FIGS. 4A to 4D. Here, the case where the lock pin 62 is engaged with the lowermost lock groove 63a of the lock plate 63 and then the lock pin 62 is engaged with the uppermost lock groove 63d of the lock plate 63 will be described as an example.

[0045] Figure 4A is a side view showing a state where the lock pin 62 is engaged with the lowermost lock groove 63a of the lock plate 63. When the lock pin 62 engages with the lock groove 63a of the lock plate 63, the rotation of the first link 52R is fixed (locked). As a result, the heights of the operation levers 23 and 24 are fixed (locked). Further, as shown in FIG. 4A, the mounting surface (see the two-dot chain line) of the operation lever mount 55R to which the operation lever 23 is attached is arranged to be tilted forward.

[0046] Figure 4B is a side view showing a state where the 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 approaching the console adjustment lever 31. By this operation, the lock lever plate 61 rotates with respect to the first link 52R using the shaft 61a as a rotation axis. As a result, the lock pin 62 comes out of the lock groove 63a of the lock plate 63. That is, the first link 52R becomes rotatable and the console adjustment lever 31 becomes operable (unlocked).

[0047] Figure 4C is a side view showing a state where the console adjustment lever 31 is pulled up in the unlocked state. The operator pulls up the console adjustment lever 31 while keeping the lock lever 32 pulled up. At this time, the biasing members 54R and 54L assist the force for pulling up the console adjustment lever 31. That is, the biasing members 54R and 54L assist the operation when the operator raises the heights of the operation levers 23 and 24. As a result, by supporting the weights of the left and right console links 51L and 51R and the members supported by the left and right console links 51L and 51R (operation levers 23 and 24, armrests 25 and 26, armrest height adjustment mechanism 71, armrest flip-up mechanism 72, and armrest rotation mechanism 73) with the biasing members 54R and 54L, the operating force when pulling up the console adjustment lever 31 can be reduced. Further, 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.

[0048] Figure 4D is a side view showing a state where the lock pin 62 is engaged with the uppermost lock groove 63d of the lock plate 63. 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 engages with the lock groove 63d. Thereby, the rotation of the first link 52R is fixed (locked).

[0049] By the above operations, the mounting surface (see the two-dot chain line) of the operation lever mount 55R is arranged at a high position as shown by comparing FIGS. 4A and 4D. Also, the tilt angle of the operation lever mount 55R is approaching horizontal.

[0050] In this way, the height of the right operation lever 23 can be adjusted by the four-bar link mechanism of the right link mechanism 50R. Also, the first link 52R of the right link mechanism 50R and the third link 52L of the left link mechanism 50L are connected by the first interlocking shaft 42. Thereby, 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 also rotates accordingly. 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 heights of the left and right operation levers 23 and 24 in conjunction with each other.

[0051] Also, the console frame 22 (height adjustment mechanism) can adjust the heights of the operation levers 23 and 24 stepwise by the lock mechanism 60. That is, the console frame 22 shown in FIGS. 3 to 4D can adjust the heights of the operation levers 23 and 24 stepwise in four steps: a state where the lock pin 62 is engaged with the lock groove 63a (see FIG. 4A), a state where the lock pin 62 is engaged with the lock groove 63b (not shown), a state where the lock pin 62 is engaged with the lock groove 63c (not shown), and a state where the lock pin 62 is engaged with the lock groove 63d (see FIG. 4D).

[0052] For example, the operator adjusts the height and tilt angle of the operation levers 23 and 24 according to the work content. For example, in the case of work such as excavating a road surface, the height and tilt angle of the operation levers 23 and 24 are adjusted so that the operation levers 23 and 24 and the armrests 25 and 26 tilt forward. On the other hand, in the case of work such as excavating upward, the height and tilt angle of the operation levers 23 and 24 are adjusted so that the operation levers 23 and 24 and the armrests 25 and 26 tilt backward. In addition, when the operator changes, the height and tilt angle of the operation levers 23 and 24 are adjusted according to the body shape of the operator.

[0053] According to the console frame 22 (height adjustment mechanism), the heights of the left and right operation levers 23 and 24 can be adjusted in conjunction with each other, that is, the heights of both the left and right operation levers 23 and 24 can be adjusted by a single operation, so the workability of the adjustment work is improved. In addition, by making it possible to adjust the heights of the left and right operation levers 23 and 24 stepwise, even when the height of the operation levers 23 and 24 is changed and then changed back to the original height, the height can be easily adjusted with good reproducibility.

[0054] Note that the console frame 22 can change the operation of the operation levers 23 and 24 by changing the link lengths of the four-bar link mechanism. FIG. 5 is a schematic diagram for explaining the operation of the links of the console frame 22.

[0055] FIGS. 5(A) and 5(B) are schematic diagrams showing an example of a four-bar link mechanism. In the configuration of the four-bar link mechanism shown in FIGS. 5(A) and 5(B), the height and tilt angle of the operation levers 23 and 24 can be adjusted.

[0056] FIGS. 5(C) and 5(D) are schematic diagrams showing another example of a four-bar link mechanism. In the configuration of the four-bar link mechanism shown in FIGS. 5(C) and 5(D), only the height of the operation levers 23 and 24 can be adjusted.

[0057] 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 operation of the console frame 22 can be changed.

[0058] Also, although the locking mechanism 60 has been described as including four locking grooves 63a to 63d in the locking plate 63, it is not limited to this, and the number of steps and the adjustment width may be changed as appropriate.

[0059] As described above, the driver's seat unit 20 can adjust the front-rear position of the seat 21 in the cabin 14, the tilt angle of the seat 21, the front-rear position of the operation levers 23 and 24 with respect to the seat 21, and the height position (and tilt angle) of the operation levers 23 and 24 with respect to the seat 21. Thereby, the operator can take a suitable driving posture, and the fatigue of the operator can be reduced.

Explanation of Reference Numerals

[0060] 10 Excavator 11 Lower Traveling 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 Armrests 27 Suspension 28 Base 31 Console Adjustment Lever (Adjustment Lever) 32 Locking Lever 33 Seat Front-Rear Adjustment Lever 34 Integrated Front-Rear 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 link 54L, 54R Biasing member 55L, 55R Operation lever mount 60 Locking mechanism 61 Lock lever plate 62 Lock pin 63 Lock plate 63a - 63d Lock grooves 71 Armrest height adjustment mechanism 72 Armrest flipping-up mechanism

Claims

1. A lower traveling body, An upper slewing body that can slew with respect to the lower traveling body, A cabin provided on the upper slewing body, A driver's seat provided in the cabin and including a pair of left and right consoles and a height adjustment mechanism for the pair of left and right consoles, The height adjustment mechanism includes A pair of left and right link mechanisms provided on each of the pair of left and right consoles, An interlocking shaft that interlocks the pair of left and right link mechanisms to interlock the heights of both of the pair of left and right consoles, A lock mechanism having a lock pin and a plurality of lock grooves, and by engaging the lock pin with any one of the lock grooves, the heights of both of the pair of left and right consoles are adjusted stepwise, The lock mechanism includes A first link that is one of a plurality of links constituting one of the pair of left and right link mechanisms and locks the rotation of the first link fixed to the interlocking shaft, An excavator.

2. The pair of left and right link mechanisms have a four-bar link mechanism, The excavator according to Claim 1.

3. The height adjustment mechanism includes 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 among 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 among the pair of left and right consoles is fixed, A third link that is fixed to the first interlocking shaft and rotatably supports the left console link, and a fourth link that is fixed to the second interlocking shaft and rotatably supports 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. The excavator according to claim 2.

4. 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 3.

5. The driver's seat further includes an armrest and a height adjustment mechanism for the armrest. The excavator according to any one of claims 1 to 4.

6. The height adjustment mechanism includes: an adjustment lever capable of adjusting the heights of both of the pair of left and right consoles in an interlocked manner, and a lock lever for locking the heights of both of the pair of left and right consoles. The excavator according to any one of claims 1 to 5.

7. The adjustment lever and the lock lever are arranged in proximity to each other. The excavator according to claim 6.

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