JP2023142467A - Work machine and cylinder cover - Google Patents

Abstract

To provide a work machine provided with a cylinder cover that can prevent generation of wear and noise caused by manufacturing errors and installation errors.SOLUTION: A work machine comprises: a vehicle body; a work device that is supported by the vehicle body to operate; a hydraulic cylinder that rotates the connected work device by a cylinder rod extending and contracting with respect to a cylinder tube; and a cylinder cover protecting the hydraulic cylinder. The cylinder cover (10) includes: a first cover (11) attached to the cylinder rod; a second cover (12) guided by a guide member attached to the cylinder tube and capable of sliding in a direction of expansion and contraction of the cylinder rod; and a connecting member (13) rotatably connecting the first cover (11) and the second cover (12) around a rotation axis extending in the expansion/contraction direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a working machine equipped with a hydraulic cylinder and a cylinder cover that protects the hydraulic cylinder.

2. Description of the Related Art Conventionally, working machines have been known that include a vehicle body, a working device that operates while being supported by the vehicle body, and a hydraulic cylinder that raises and lowers the working device. A cylinder cover is sometimes attached to such working machines in order to prevent the hydraulic cylinder from colliding with other members and being damaged (for example, see Patent Document 1).

The cylinder cover described in Patent Document 1 is configured such that one end is fixed to the cylinder rod, and the other end is guided by a guide member attached to the cylinder tube so as to be slidable in the direction of expansion and contraction of the cylinder rod.

Utility model registration No. 2509189

However, in the configuration of the cylinder cover described in Patent Document 1, if there are manufacturing errors or assembly errors in parts, an uneven load is applied to the sliding contact portion between the cylinder cover and the guide member, causing wear and noise. There is the issue of

The present invention has been made in view of the above-mentioned actual situation, and its purpose is to provide a working machine and a cylinder cover that are equipped with a cylinder cover that can prevent wear and noise caused by manufacturing errors and installation errors. It is in.

To achieve the above object, the present invention includes a vehicle body, a working device that operates while being supported by the vehicle body, and a cylinder rod that extends and contracts with respect to a cylinder tube, thereby rotating the connected working device. In a working machine including a hydraulic cylinder and a cylinder cover that protects the hydraulic cylinder, the cylinder cover is guided by a first cover attached to the cylinder rod and a guide member attached to the cylinder tube, It is characterized by having a second cover that is slidable in the direction of expansion and contraction of the cylinder rod, and a connecting member that connects the first cover and the second cover so as to be rotatable around a rotation axis that extends in the direction of expansion and contraction of the cylinder rod. shall be.

According to the present invention, it is possible to obtain a working machine and a cylinder cover that are equipped with a cylinder cover that prevents wear and noise caused by manufacturing errors and installation errors. Note that problems, configurations, and effects other than those described above will be made clear by the description of the embodiments below.

It is a perspective view of a hydraulic excavator. It is a figure showing a cylinder cover concerning a 1st embodiment. FIG. 6 is a perspective view and a side view of the cylinder cover when the boom cylinder is extended. FIG. 6 is a perspective view and a side view of the cylinder cover when the boom cylinder is contracted. It is a figure showing the cylinder cover concerning a 2nd embodiment. It is a figure showing the cylinder cover concerning a 3rd embodiment.

[First embodiment]
An embodiment of a hydraulic excavator 1 (working machine) according to the present invention will be described using the drawings. Note that a specific example of the working machine is not limited to the hydraulic excavator 1, but may be a wheel loader, a crane, a dump truck, or the like. Further, front, rear, left, and right in this specification are based on the viewpoint of an operator who rides and operates the hydraulic excavator 1, unless otherwise specified.

FIG. 1 is a perspective view of a hydraulic excavator 1. As shown in FIG. 1, the hydraulic excavator 1 includes a lower traveling body 2 and an upper rotating body 3 supported by the lower traveling body 2. The lower traveling body 2 and the upper rotating body 3 are examples of vehicle bodies.

The lower traveling body 2 includes a pair of left and right crawlers. Then, when the rotation of the travel motor (not shown) is transmitted and the pair of left and right crawlers rotate, the hydraulic excavator 1 travels. However, the lower traveling body 2 may be a wheeled type instead of a crawler. Furthermore, an earth removal blade 8 is attached to the front end of the lower traveling body 2. The earth removal blade 8 is another example of a working device that rotates (raises and lowers) by the expansion and contraction of an earth removal cylinder (not shown).

The upper rotating structure 3 is supported by the lower traveling structure 2 so as to be able to turn by a turning motor (not shown). The upper revolving body 3 includes a revolving frame 5 serving as a base, a front working device 4 (working device) attached to the front center of the revolving frame 5 so as to be rotatable in the vertical direction, and a front working device 4 (working device) disposed at the center of the revolving frame 5. It mainly includes a cab (driver's seat) 7 and a counterweight 6 disposed at the rear of a revolving frame 5.

The front work equipment 4 includes a boom 4a rotatably supported by the upper revolving structure 3, an arm 4b rotatably supported at the tip of the boom 4a, and a boom 4b rotatably supported at the tip of the arm 4b. It includes a supported bucket 4c, a boom cylinder 4d that drives the boom 4a, an arm cylinder 4e that drives the arm 4b, and a bucket cylinder 4f that drives the bucket 4c. The counterweight 6 is used to balance the weight with the front working machine 4, and is a heavy object having an arcuate shape when viewed from above.

The boom cylinder 4d has one end (cylinder tube 23 in FIG. 3) rotatably connected to the upper rotating structure 3, and the other end (cylinder rod 24 in FIG. 3) to be rotatably connected to the boom 4a. Then, as the cylinder rod 24 expands and contracts with respect to the cylinder tube 23, the boom 4a rotates (raises and lowers) with respect to the upper revolving structure 3.

More specifically, the boom cylinder 4d includes a cylinder tube 23 and a cylinder rod 24. The cylinder tube 23 has a base end rotatably connected to the upper revolving body 3, and an opening (hereinafter referred to as "tip opening") formed at the tip. Cylinder rod 24 is inserted into cylinder tube 23 through the tip opening. The cylinder rod 24 is configured to be movable in the expansion and contraction direction by supplying and discharging hydraulic oil to and from the cylinder tube 23.

Moreover, one end of the arm cylinder 4e is rotatably connected to the boom 4a, and the other end is rotatably connected to the arm 4b. Then, as the arm cylinder 4e expands and contracts, the arm 4b rotates relative to the boom 4a. Further, the bucket cylinder 4f has one end rotatably connected to the arm 4b, and the other end rotatably connected to the bucket 4c. Then, as the bucket cylinder 4f expands and contracts, the bucket 4c rotates relative to the arm 4b.

The boom cylinder 4d, the arm cylinder 4e, the bucket cylinder 4f, and the earth removal cylinder are examples of hydraulic cylinders that rotate the front working machine 4 using hydraulic oil supplied from a hydraulic pump (not shown).

The cab 7 has an internal space in which an operator who operates the hydraulic excavator 1 rides. In the interior space of the cab 7, a seat for an operator to sit on and an operating device operated by the operator seated on the seat are arranged. The operating device receives an operator's operation for operating the hydraulic excavator 1. When the operator operates the operating device, the lower traveling body 2 travels, the upper revolving body 3 rotates, and the front working machine 4 operates. Note that specific examples of the operating device include a lever, a steering wheel, an accelerator pedal, a brake pedal, a switch, and the like.

A cylinder cover 10 is attached to the boom cylinder 4d. The cylinder cover 10 protects the boom cylinder 4d. More specifically, the cylinder cover 10 is disposed on the opposite side of the boom 4a across the boom cylinder 4d. However, the cylinder cover 10 is not limited to protecting the boom cylinder 4d, and may protect other hydraulic cylinders (arm cylinder 4e, bucket cylinder 4f, earth removal cylinder, etc.).

FIG. 2 is a diagram showing the cylinder cover 10 according to the first embodiment. FIG. 3 is a perspective view and a side view of the cylinder cover 10 when the boom cylinder 4d is extended. FIG. 4 is a perspective view and a side view of the cylinder cover 10 when the boom cylinder 4d is contracted. In addition, in FIG. 2, the upper left figure is a view of the cylinder cover 10 seen from the boom cylinder 4d side, the right figure is a side view of the upper left figure seen from arrow A, and the lower left figure is a sectional view taken along BB in the upper left figure. .

The cylinder cover 10 as a whole has an elongated plate-like outer shape that is long in the direction of expansion and contraction of the boom cylinder 4d (hereinafter simply referred to as "the direction of expansion and contraction"). In this specification, of the two directions orthogonal to the expansion and contraction direction, the thickness direction of the cylinder cover 10 is simply referred to as the "thickness direction", and the width direction of the cylinder cover 10 is simply referred to as the "width direction". As shown in FIG. 2, the cylinder cover 10 mainly includes a first cover 11, a second cover 12, a connecting member 13, and a pair of caps 14a and 14b.

The first cover 11 is a plate-shaped member that extends in the expansion/contraction direction and the width direction. The first cover 11 is made of, for example, a metal material. The first cover 11 is formed with through holes 15, 16a, and 16b that penetrate in the thickness direction. The through hole 15 is formed at the center in the width direction at the end opposite to the second cover 12 in the expansion/contraction direction. The through holes 16a and 16b are formed at positions spaced apart in the width direction at the end on the second cover 12 side in the expansion/contraction direction.

The first cover 11 is attached to the tip of the cylinder rod 24 by, for example, a bolt (not shown) inserted into the through hole 15. The “tip end of the cylinder rod 24” is a portion of the cylinder rod 24 that is exposed from the cylinder tube 23 even when the boom cylinder 4d is contracted the most. Note that the method of attaching the first cover 11 to the cylinder rod 24 is not limited to the above-mentioned example.

The second cover 12 is arranged at a position spaced apart from the first cover 11 toward the cylinder tube 23 in the direction of expansion and contraction. The second cover 12 is made of, for example, a metal material. The second cover 12 is configured to be slidable with respect to the cylinder tube 23 along a guide member 25 (see FIGS. 3 and 4) attached to the outer surface of the cylinder tube 23. That is, the guide member 25 is arranged between the second cover 12 and the cylinder tube 23. The second cover 12 includes a protection portion 17 and a pair of wrapping portions 18a and 18b.

The protection portion 17 is a plate-shaped portion that extends in the expansion/contraction direction and the width direction. The protective portion 17 is formed with through holes 19a and 19b that penetrate in the thickness direction. The through holes 19a and 19b are arranged at positions spaced apart in the width direction at the ends on the first cover 11 side in the expansion and contraction direction. The pair of wrapping parts 18a and 18b extend in the expansion and contraction direction at both ends of the protection part 17 in the width direction. The holding parts 18a and 18b are parts that hold the caps 14a and 14b by folding both ends of the protection part 17 in the width direction toward the boom cylinder 4d.

The caps 14a and 14b are long rod-shaped members that extend in the direction of expansion and contraction. The caps 14a and 14b are made of, for example, a resin material. The caps 14a and 14b held by the holding parts 18a and 18b are arranged to face each other in the width direction. Further, the distance between the caps 14a and 14b in the width direction is set to be the same as or slightly larger than the width direction dimension of the guide member 25. Further, the opposing surfaces of the caps 14a, 14b are exposed from the holding parts 18a, 18b. The second cover 12 is arranged so that the guide member 25 is sandwiched between the caps 14a and 14b.

The connecting member 13 is, for example, a plate-shaped member that has a rectangular outer shape when viewed in plan from the thickness direction. The connecting member 13 is arranged between the first cover 11 and the second cover 12 in the expansion/contraction direction. The connecting member 13 is also formed with through holes 20a, 20b, 21a, and 21b that penetrate in the thickness direction. The through holes 20a and 20b are formed at an end portion on the first cover 11 side in the expansion/contraction direction so as to be spaced apart in the width direction. The through holes 21a and 21b are formed at an end portion on the second cover 12 side in the expansion/contraction direction so as to be spaced apart in the width direction.

The connecting member 13 is overlapped with the first cover 11 so that the through holes 16a, 20a and the through holes 16b, 20b communicate with each other. Further, the connecting member 13 is overlapped with the second cover 12 so that the through holes 19a, 21a and the through holes 19b, 21b communicate with each other. Then, by screwing nuts (not shown) from the opposite side onto the bolts 22 inserted into the communicating through holes 16a, 20a, through holes 16b, 20b, through holes 19a, 21a, and through holes 19b, 21b, The first cover 11 and the second cover 12 are connected by a connecting member 13. Note that the connecting member 13 according to the first embodiment is arranged closer to the boom cylinder 4d than the first cover 11 and the second cover 12.

Note that the specific method for attaching the first cover 11 and the second cover 12 to the connecting member 13 is not limited to the above-mentioned example. As another example, the first cover 11 and the second cover 12 can be closed by screwing bolts into insert nuts inserted into some of the through holes 16a, 16b, 19a, 19b, 20a, 20b, 21a, and 21b. It may also be attached to the connecting member 13.

Further, the connecting member 13 is made of an elastic body (for example, resin, rubber, etc.). Thereby, the connecting member 13 connects the first cover 11 and the second cover 12 about the first virtual line L1 (rotation axis) that passes through the center of the cylinder cover 10 in the width direction and thickness direction and extends in the expansion and contraction direction. Connected for free rotation. Further, the connecting member 13 connects the first cover 11 and the second cover 12 so as to be bendable in the thickness direction.

Furthermore, the widthwise dimension of the first cover 11 gradually increases from the first dimension W1 to the second dimension W2 from the through hole 15 side toward the through holes 16a, 16b side (in other words, the second cover 12). becomes larger (W1<W2). On the other hand, the widthwise dimensions of the second cover 12 and the connecting member 13 are set to the second dimension W2.

When the boom cylinder 4d is extended, the cylinder rod 24 moves in a direction in which it projects from the cylinder tube 23 through the tip opening. At this time, the cylinder cover 10 is guided by the guide member 25 and slides together with the cylinder rod 24 in the expansion and contraction direction. As a result, as shown in FIG. 3, the portion of the cylinder rod 24 exposed from the cylinder tube 23 is protected by the cylinder cover 10.

On the other hand, when the boom cylinder 4d is contracted, the cylinder rod 24 moves in the direction of being retracted into the cylinder tube 23 through the tip opening. At this time, the cylinder cover 10 is guided by the guide member 25 and slides together with the cylinder rod 24 in the expansion and contraction direction. As a result, as shown in FIG. 4, the portion of the cylinder rod 24 exposed from the cylinder tube 23 and the cylinder tube 23 are protected by the cylinder cover 10.

According to the first embodiment, the first cover 11 and the second cover 12 are connected by the connecting member 13. As a result, even if there is a manufacturing error or an assembly error in the parts constituting the cylinder cover 10, an uneven load will be applied to the sliding contact portion between the cylinder cover 10 and the guide member 25, and the caps 14a and 14b will be worn out. , noise can be prevented from occurring. Further, according to the first embodiment, since the second cover 12 is bendable in the thickness direction with respect to the first cover 11, wear and noise generation can be more effectively prevented.

Further, according to the first embodiment, by setting the dimension in the width direction of the connecting member 13 to the second dimension W2, when the second cover 12 is displaced with respect to the first cover 11, the Load can be distributed.

Note that the specific configuration of the cylinder cover 10 is not limited to the example shown in FIG. 2. Hereinafter, a cylinder cover 30 according to a second embodiment will be described with reference to FIG. 5, and a cylinder cover 50 according to a third embodiment will be described with reference to FIG. Note that a detailed explanation of the common points with the first embodiment will be omitted, and the explanation will focus on the differences.

[Second embodiment]
FIG. 5 is a diagram showing a cylinder cover 30 according to the second embodiment. In addition, in FIG. 5, the upper left figure is a view of the cylinder cover 30 seen from the boom cylinder 4d side, the right figure is a side view of the upper left figure seen from arrow C, and the lower left figure is a sectional view taken along DD in the upper left figure. . The cylinder cover 30 according to the second embodiment includes a first cover 31, a second cover 32, a bolt 33a (connecting member), a double nut 33b, and a pair of caps 14a and 14b. The configurations of the caps 14a and 14b are the same as in the first embodiment.

The first cover 31 is made of, for example, a metal material. The first cover 31 includes a first protection part 34 and a first flange part 35. The first protection portion 34 is a flat plate-shaped portion extending in the expansion/contraction direction. The first flange portion 35 is a flat plate-shaped portion that protrudes from the end of the first protection portion 34 on the second cover 32 side to one side in the thickness direction of the first protection portion 34 (the side opposite to the boom cylinder 4d). be. That is, the first cover 31 has an L-shaped outer shape when viewed from the side in the width direction as shown in the right diagram of FIG.

A through hole 36 penetrating in the thickness direction is formed in the first protection portion 34 . The through hole 36 is formed at the center of the first protection part 34 in the width direction. Then, the first cover 31 is attached to the tip of the cylinder rod 24 by a bolt (not shown) inserted into the through hole 36 or the like. However, the method of attaching the first cover 31 to the cylinder rod 24 is not limited to the above-mentioned example.

A first through hole 37 is formed in the first flange portion 35 . The first through hole 37 is formed at the center of the first flange 35 in the width direction and in the center of the protrusion direction of the first flange 35 in the expansion/contraction direction (thickness direction of the first flange 35). Penetrating.

The second cover 32 is made of, for example, a metal material. The second cover 32 includes a second protection part 38, a pair of wrapping parts 39a and 39b, and a second collar part 40. The configuration of the second protection part 38 is similar to that of the first embodiment, except that the end on the first cover 31 side is tapered and the through holes 19a and 19b are omitted. Same as part 17. Furthermore, the configurations of the holding parts 39a and 39b are the same as those of the holding parts 18a and 18b according to the first embodiment.

The second flange part 40 extends from the end of the second protection part 38 on the first cover 31 side to one side in the thickness direction of the second protection part 38 (the opposite side to the boom cylinder 4d, the opposite side to the wrapping parts 39a and 39b). It is a flat plate-shaped part that protrudes from the side. That is, the second cover 32 has an inverted L-shaped outer shape when viewed from the side in the width direction as shown in the right diagram of FIG. A second through hole 41 is formed in the second flange portion 40 . The second through hole 41 extends the second flange 40 in the expansion and contraction direction (thickness direction of the second flange 40) at the center of the second flange 40 in the width direction and in the center of the protrusion direction of the second flange 40. Penetrating.

As shown in FIG. 5, when the first cover 31 and the second cover 32 are viewed sideways from the same direction, the first flange 35 and the second flange 40 protrude in the same direction. Then, when the first flange 35 and the second flange 40 are overlapped, the first through hole 37 and the second through hole 41 communicate with each other. Next, by inserting the bolt 33a into the first through hole 37 and the second through hole 41, which communicate with each other, and screwing the double nut 33b on the opposite side, the first cover 31 and the second cover 32 are fixed with a predetermined gap ( They are connected with some play. In addition, in the second embodiment, an example was shown in which the bolt 33a is inserted from the first flange 35 side and the double nut 33b is screwed together on the second flange 40 side, but the arrangement of the bolt 33a and the double nut 33b is The opposite may be true.

The diameters of the first through hole 37 and the second through hole 41 are set to be slightly larger than the diameter of the shaft portion of the bolt 33a. Further, a predetermined gap is provided between the first flange 35 and the second flange 40 and their opposing surfaces. Thereby, the bolt 33a and the double nut 33b are attached to a second imaginary line L2 (rotation axis ), the first cover 31 and the second cover 32 are rotatably connected. Further, by further increasing the diameters of the first through hole 37 and the second through hole 41, the bolt 33a and the double nut 33b can connect the first cover 31 and the second cover 32 in a manner that allows the first cover 31 and the second cover 32 to be bent in the thickness direction. can.

The cylinder cover 30 according to the second embodiment can also provide the same effects as the first embodiment. Note that the first cover 31 and the second cover 32 according to the second embodiment may be connected by a pin 53 shown in FIG. 6 instead of the bolt 33a.

[Third embodiment]
FIG. 6 is a diagram showing a cylinder cover 50 according to the third embodiment. In addition, in FIG. 6, the upper left figure is a view of the cylinder cover 50 seen from the boom cylinder 4d side, the right figure is a side view of the upper left figure seen from arrow E, and the lower left figure is a sectional view taken along FF in the upper left figure. . The cylinder cover 50 according to the third embodiment includes a first cover 51, a second cover 52, a pin 53 (connecting member), and a pair of caps 14a and 14b. The configurations of the caps 14a and 14b are the same as in the first embodiment.

The first cover 51 is made of, for example, a metal material. The first cover 51 includes a first protection part 54 and a first collar part 55. A through hole 56 is formed in the first protection portion 54 . A first through hole 57 is formed in the first collar portion 55 . The configuration of the first cover 51 is common to the first cover 31 according to the second embodiment.

The second cover 52 is made of, for example, a metal material. The second cover 52 includes a second protection portion 58, a pair of wrapping portions 59a and 59b, and a second collar portion 60. The configuration of the second protection section 58 is common to the second protection section 38 according to the second embodiment. Furthermore, the configurations of the holding parts 59a and 59b are common to the holding parts 39a and 39b according to the second embodiment.

The second flange portion 60 protrudes from the end of the second protection portion 58 on the first cover 51 side to the other side in the thickness direction of the second protection portion 58 (boom cylinder 4d side, wrapping portions 59a, 59b side). It is a flat plate-shaped part. That is, the second cover 52 has an L-shaped outer shape when viewed from the side in the width direction as shown in the right diagram of FIG. A second through hole 61 is formed in the second flange portion 60 . The second through hole 61 extends the second collar 60 in the expansion and contraction direction (thickness direction of the second collar 60) at the center of the second collar 60 in the width direction and in the center of the protrusion direction of the second collar 60. Penetrating.

As shown in FIG. 6, when the first cover 51 and the second cover 52 are viewed from the same direction, the first flange 55 and the second flange 60 protrude in opposite directions. When the first flange 55 and the second flange 60 are overlapped so as to engage with each other, the first through hole 57 and the second through hole 61 communicate with each other. "Laying the first flange 55 and the second flange 60 so as to engage with each other" means, for example, overlapping them so that the first flange 55 is located closer to the cylinder tube 23 than the second flange 60. refers to something.

Next, the first cover 51 and the second cover 52 are connected by inserting the pin 53 into the first through hole 57 and the second through hole 61 that communicate with each other and attaching the retaining pin 53b to the through hole 53a. In addition, in the third embodiment, an example was shown in which the pin 53 is inserted from the second flange 60 side and the retaining pin 53b is attached on the first flange 55 side, but the arrangement of the pin 53 and the retaining pin 53b is The opposite may be true.

The diameters of the first through hole 57 and the second through hole 61 are set to be slightly larger than the diameter of the shaft portion of the pin 53. Thereby, the pin 53 is centered around the third imaginary line L3 (rotation axis) that extends in the expansion and contraction direction through the center of the pin 53 (in other words, the center of the first through hole 57 and the second through hole 61). , the first cover 51 and the second cover 52 are rotatably connected. Further, by further increasing the diameters of the first through hole 57 and the second through hole 61, the pin 53 can connect the first cover 31 and the second cover 32 so as to be bendable in the thickness direction.

The cylinder cover 50 according to the third embodiment can also provide the same effects as the first embodiment. Further, as in the third embodiment, by engaging the first flange 55 and the second flange 60 with each other, part of the weight of the second cover 52 can be supported by the first cover 51. , the load applied to the pin 53 can be reduced. Note that the first cover 51 and the second cover 52 according to the third embodiment may be connected by bolts 33a shown in FIG. 5 instead of the pins 53.

The embodiments described above are illustrative examples of the present invention, and are not intended to limit the scope of the present invention only to those embodiments. Those skilled in the art can implement the present invention in various other ways without departing from the spirit of the invention.

1 Hydraulic excavator (work machine)
2 Lower running body (vehicle body)
3 Upper rotating body (vehicle body)
4 Front work equipment 4a Boom 4b Arm 4c Bucket 4d Boom cylinder (hydraulic cylinder)
4e Arm cylinder (hydraulic cylinder)
4f Bucket cylinder (hydraulic cylinder)
5 Rotating frame 6 Counterweight 7 Cab 8 Discharging blades 10, 30, 50 Cylinder covers 11, 31, 51 First cover 12, 32, 52 Second cover 13 Connecting members 14a, 14b Caps 15, 16a, 16b, 19a, 19b, 20a, 20b, 21a, 21b, 36, 53a, 56 Through hole 17 Protective part 18a, 18b, 39a, 39b, 59a, 59b Encasing part 22 Bolt 23 Cylinder tube 24 Cylinder rod 25 Guide member 33a Bolt (connecting member )
33b Double nut 34, 54 First protection part 35, 55 First collar part 37, 57 First through hole 38, 58 Second protection part 40, 60 Second collar part 41, 61 Second through hole 53 Pin (connecting member )
53b Retaining pin

Claims (6)

A vehicle body, a working device that is supported by the vehicle body and operates, a hydraulic cylinder that rotates the connected working device by a cylinder rod extending and contracting with respect to a cylinder tube, and a cylinder cover that protects the hydraulic cylinder. In a working machine equipped with,
The cylinder cover is
a first cover attached to the cylinder rod;
a second cover that is slidable in the direction of expansion and contraction of the cylinder rod while being guided by a guide member attached to the cylinder tube;
A working machine comprising: a connecting member that connects the first cover and the second cover so as to be rotatable around a rotational axis extending in the expansion/contraction direction. The working machine according to claim 1,
A working machine characterized in that the connecting member is made of resin or rubber. The working machine according to claim 2,
The dimension in the width direction of the first cover perpendicular to the expansion/contraction direction gradually increases from the first dimension toward the second cover to a second dimension longer than the first dimension,
The working machine, wherein the widthwise dimension of the second cover and the connecting member is the second dimension. The working machine according to claim 1,
The first cover is
a first protection portion extending in the expansion/contraction direction;
a first flange in which a first through hole is formed that protrudes from an end of the first protection part and penetrates in the expansion/contraction direction;
The second cover is
a second protection portion extending in the expansion/contraction direction;
a second flange in which a second through hole is formed that protrudes from an end of the second protection part and penetrates in the expansion/contraction direction;
The working machine is characterized in that the connecting member connects the first cover and the second cover while being inserted into the first through hole and the second through hole. The working machine according to claim 1,
The first cover is
a first protection portion extending in the expansion/contraction direction;
a first flange in which a first through hole is formed that protrudes from an end of the first protection part and penetrates in the expansion/contraction direction;
The second cover is
a second protection portion extending in the expansion/contraction direction;
a second flange portion in which a second through hole is formed that protrudes from an end of the second protection portion and penetrates in the expansion/contraction direction;
The connecting member connects the first cover and the second cover with the first flange and the second flange engaged with each other and inserted into the first through hole and the second through hole. A working machine characterized by connecting. In a cylinder cover that protects a hydraulic cylinder having a cylinder tube and a cylinder rod that is extendable and retractable with respect to the cylinder tube,
a first cover attached to the cylinder rod;
a second cover attached to the cylinder tube so as to be slidable in the direction of expansion and contraction of the cylinder rod;
A cylinder cover comprising: a connecting member rotatably connecting the first cover and the second cover around a rotation axis extending in the expansion/contraction direction.

Images