CN210416776U

CN210416776U - Cab structure for construction machine and construction machine including the same

Info

Publication number: CN210416776U
Application number: CN201920882977.9U
Authority: CN
Inventors: 李相奎
Original assignee: Doosan Infracore Co Ltd
Current assignee: Hyundai Yingweigao Co ltd
Priority date: 2018-06-12
Filing date: 2019-06-12
Publication date: 2020-04-28
Anticipated expiration: 2029-06-12
Also published as: KR102562133B1; KR20190140618A

Abstract

The utility model provides an engineering machine tool's driver's cabin structure reaches engineering machine tool including it. The cab structure of the construction machine may include a main frame, a cab table, a cab, and a connection mechanism. The cab stand may be disposed on the main frame. The cab may be disposed on the cab base. The connection mechanism may enable the cab and the cab stand to be detachably connected. Therefore, the separated cab, cab stand, and main frame can be mounted on the container, and the transportation cost of the cab structure can be saved. Further, by connecting the pillars of the cab to the cab base via the connection mechanism, each pillar can bear a load together with the cab base and the main frame, rather than bearing a load alone. Therefore, plastic deformation of the cab structure can be suppressed.

Description

Cab structure for construction machine and construction machine including the same

Technical Field

The present invention relates to a cab structure and an engineering machine including the same, and more particularly, to a connection structure between a cab and a main frame of a cab structure.

Background

In general, a work machine may include heavy equipment for work, such as a wheel loader, an excavator, a dozer, a power shovel, a tractor, and the like. Such a work machine may include a cab structure for protecting the driver. The cab structure may include a main frame, a cab floor, and a cab. The cab may be fixed to a cab floor. The cab floor may be fixed to the main frame.

According to the related art, a cab bed on which a cab is mounted may be welded to a main frame. Therefore, it may not be easy to separate the cab and the cab stand from the main frame. Since such a cab structure has a large volume, it cannot be loaded on a container. Therefore, the cost of transporting the cab structure may be increased.

Further, when the cab structure receives a load in a direction perpendicular to the horizontal direction, the cab welded to the main frame may be plastically deformed. In order to prevent plastic deformation of the cab, a reinforcement may be provided in the cab structure, but such a reinforcement may complicate the structure of the cab structure and also increase the unit price.

SUMMERY OF THE UTILITY MODEL

The utility model provides a when having the rigidity that can prevent plastic deformation, can also save the driver's cabin structure of freight.

Furthermore, the utility model also provides an engineering machine tool including above-mentioned driver's cabin structure.

The above-mentioned utility model can be realized through following technical scheme.

According to an aspect of the present invention, a cab structure for a construction machine is provided. The cab structure of the construction machine may include a main frame, a cab table, a cab, and a connection mechanism. The cab stand may be disposed on the main frame. The cab may be disposed on the cab base. The connection mechanism may enable the cab and the cab stand to be detachably connected.

According to an exemplary embodiment, the cab may include a plurality of pillars connected below the upper plate. The connection mechanism may include: a plurality of flange portions connected to a lower end of each of the pillars; and a plurality of fastening members which penetrate through the first fastening holes formed in each of the flange portions and are fastened to second fastening holes formed in an upper surface of the cab stand, so that the pillars are separably coupled to the cab stand.

In some exemplary embodiments, the connection mechanism may further include a plurality of reinforcing ribs configured to connect the plurality of flange portions and the plurality of pillars corresponding to each other. Each of the plurality of reinforcing ribs may be in the shape of a plate connecting an upper face of each of the plurality of flange portions and a side face of each of the plurality of pillars.

In some exemplary embodiments, the plurality of pillars may include a pair of front pillars supporting a front lower portion of the upper plate and a pair of rear pillars supporting a rear lower portion of the upper plate. The reinforcement rib formed at the front pillar among the plurality of reinforcement ribs may be in a shape extending from the front pillar toward the other front pillar that is opposed.

In some exemplary embodiments, the reinforcing ribs formed at the rear pillars among the plurality of reinforcing ribs may include first reinforcing ribs in a shape extending from the rear pillars toward another rear pillar and second reinforcing ribs in a shape extending from the rear pillars toward the front pillars.

In some exemplary embodiments, the fastening member may include a bolt.

In some exemplary embodiments, the cab structure may further include: and at least one vibration damping mount disposed between the cab platform and the main frame, the vibration damping mount damping vibration transmitted from the main frame to the cab platform.

In some exemplary embodiments, the cab structure may further include: at least one retainer provided on a lower surface of the cab floor so as to be spaced apart from the main frame.

In some exemplary embodiments, the cab structure may further include: and a lower support body connecting the flange portions to each other.

According to another aspect of the present disclosure, a construction machine is provided, which may include a cab structure. The cab structure may include a main frame, a cab floor, a cab, and a connection mechanism. The cab stand may be disposed on the main frame. The cab may be disposed on the cab base. The connection mechanism may enable the cab and the cab stand to be detachably connected.

The utility model has the following effects.

According to the above-mentioned the utility model discloses, the pillar that makes the driver's cabin can be connected to the driver's cabin platform separately to can load the driver's cabin, driver's cabin platform and the body frame of separation in the container, therefore can save the freight of driver's cabin structure. Further, by connecting the pillars of the cab to the cab base via the connection mechanism, each pillar can bear a load together with the cab base and the main frame, rather than bearing a load individually. Therefore, plastic deformation of the cab structure can be suppressed.

Drawings

Fig. 1 is an exploded perspective view showing a cab structure of a construction machine according to an embodiment of the present invention.

Fig. 2 is a perspective view showing the cab and the cab base of the cab structure shown in fig. 1 in an enlarged manner.

Fig. 3 is a perspective view showing an enlarged view of a portion III of fig. 2.

Fig. 4 is a cross-sectional view showing a connection structure between a cab and a cab stand of the cab structure illustrated in fig. 1.

Fig. 5 is a cross-sectional view showing the arrangement of the pillars of the cab structure shown in fig. 1.

Fig. 6 is a graph showing a comparison of the supporting force with respect to the displacement of the cab structure shown in fig. 1 and the conventional cab structure.

Description of the symbols

110: cab, 112: upper plate, 114: front pillar, 116: rear pillar, 120: cab stand, 130: main frame, 140: damping seat, 150: a holder, 160: connection mechanism, 162: flange portion, 163: first fastening hole, 167: support rib, 168: and (3) fastening the components.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The present invention may take various forms with various modifications, and specific embodiments thereof are shown in the drawings and will herein be described in detail. However, the present invention is not intended to be limited to the specific embodiments disclosed, but rather, the present invention is to be construed as including all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention. In the description of the drawings, like reference numerals are used for like components.

The terms first, second, etc. may be used to describe various elements, but these elements should not be limited by these terms. These terms may be used for the purpose of distinguishing one constituent element from another constituent element. For example, a first component may be named as a second component, and similarly, a second component may also be named as a first component, without departing from the scope of the present invention.

The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless the context clearly dictates otherwise, singular references include plural references. In the present application, terms such as "including" or "having" should be understood as specifying the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and not excluding the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

Unless defined differently, including technical or scientific terms, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in dictionaries as generally used should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Fig. 1 is an exploded perspective view showing a cab structure of a construction machine according to an embodiment of the present invention, fig. 2 is a perspective view showing an enlarged view of a cab and a cab base of the cab structure shown in fig. 1, fig. 3 is a perspective view showing a portion III of the enlarged view of fig. 2, fig. 4 is a sectional view showing a connection structure between a cab and a cab base of the cab structure shown in fig. 1, and fig. 5 is a sectional view showing an arrangement of a pillar of the cab structure shown in fig. 1.

Referring to fig. 1 to 5, the cab structure of the construction machine of the present embodiment may include a cab 110, a cab stand 120, a main frame 130, a plurality of vibration-damping mounts 140, a plurality of retainers 150, and a connection mechanism 160.

The main frame 130 may support a load of the construction machine. A plurality of damper mounts 135 supporting the cab 110 may be formed to protrude upward from the main frame 130.

The cab floor 120 may be disposed on the main frame 130. The cab stand 120 may be fixed to the main frame 130 by a fastening member such as a bolt.

The cab 110 may be disposed on a cab floor 120. The cab 110 may include an upper plate 112 and a plurality of pillars connected to a lower surface of the upper plate 112. The plurality of struts may include 2 front struts 114 and 2 rear struts 116. The front pillars 114 may be fixed to both front corners of the lower surface of the upper plate 112. The rear support 116 may be fixed to the rear both side corners of the lower surface of the upper plate 112. In some exemplary embodiments, the lower ends of the

struts

114, 116 may be connected to the lower support 113. The lower support 113 may have a shape connecting lower ends of the support posts 114 and 116 described later.

The connection mechanism 160 may enable the cab 110 to be detachably connected to the cab base 120. Specifically, the connection mechanism 160 may enable the lower ends of the front and

rear pillars

114, 116 to be detachably connected to the cab legs 120. Thus, there may be 4 connection mechanisms 160 corresponding to 4

struts

114, 116. The connection mechanism 160 may include flange portions 162, reinforcing

ribs

167, 167a, 167b, fastening parts 168, and fastening holes 163, respectively.

The flange portion 162 may be connected to a lower end of each of the

struts

114, 116. At least one fastening hole 163 may be penetratingly formed at the flange part 162. The fastening member 168 may be fastened to the second fastening hole 121 formed in the cab stand 120 by penetrating the first fastening hole 163, and may connect the

support columns

114 and 116 to the cab stand 120. When a plurality of first fastening holes 163 are formed for each flange portion 162, they may be arranged symmetrically about a support rib 167 to be described later.

This allows cab stand 120 and cab 110 to be connected so as to be separable. In the present embodiment, the fastening member 168 may include a bolt. That is, the cab 110 can be separated from the cab stand 120 by a simple operation of loosening the bolts from the first fastening holes 163 and the second fastening holes 121. However, the fastening member 168 is not limited to a bolt, and may include another member that enables the cab 110 to be detachably connected to the cab stand 120.

In this way, the 4

support columns

114 and 116 are detachably connected to the cab stand 120 by the connection mechanism 160. Thus, the lateral load applied to the cab structure can be supported by the

pillars

114, 116 at once. Then, the lateral load can be secondarily supported by the cab stand 120 detachably connected to the

pillars

114, 116 by the fastening member 168. As a result, plastic deformation of the cab structure can be suppressed.

Reinforcing

ribs

167, 167a, 167b are formed on the upper surface of each flange portion 162, so that deformation of the cab 110 can be suppressed even under a large load. The reinforcing

ribs

167, 167a, 167b may be formed in a plate shape connecting the upper surface of the flange portion 162 and the lower end side surfaces of the

respective pillars

114, 116. Each of the reinforcing

ribs

167, 167a, 167b may be formed in a polygonal shape having a wide lower end connected to the flange portion 162 and becoming narrower toward the upper end. Further, 1 or more reinforcing

ribs

167, 167a, 167b may be provided for each of the

pillars

114, 116. As shown in fig. 1, the reinforcing rib 167 connected to the front pillar 114 may be formed in a shape of 1 plate extending toward the opposite side front pillar 114 opposite to the front pillar 114. On the other hand, the reinforcing

ribs

167a, 167b connected to the rear pillar 116 may include 2 reinforcing ribs. May include a first reinforcing rib 167a formed to extend toward the rear pillar 114 in a similar direction as the reinforcing rib 167 of the front pillar 114, i.e., the opposite side to the rear pillar 116, and a second reinforcing rib 167b formed to extend from the rear pillar 116 toward the front pillar 114 opposite to the rear pillar 116.

Damper seat 140 may be disposed between cab floor 120 and main frame 130. In particular, the damper base 140 may be disposed at a lower portion of the

struts

114 and 116, and an upper portion of the damper base 140 may be mounted to the third fastening hole 123 formed in the lower surface of the cab base 120. The third fastening hole 123 may be formed at a protrusion 127 protrudingly formed at a lower portion of the cab stand 120, and the damper seat 140 may be mounted to the third fastening hole 123 by another fastening member such as a bolt 143. On the other hand, the lower portion 141 of the damping seat 140 may be mounted to the fourth fastening hole 136 formed in the damping seat frame 135. To this end, the lower portion 141 of the vibration damping mount 140 may include a screw thread formed to be screw-coupled to the fourth fastening hole 136. The vibration damping mount 140 may damp vibration transmitted from the main frame 130 to the cab stand 120. The damper base 140 may be disposed at a position offset from the center axis of the

strut

114, 116. As another example, the damping mount 140 may also be located on the central axis of the

struts

114, 116. The damper seat 140 may include a rubber damper seat, a fluid damper seat, or the like.

The holder 150 may be disposed on a lower surface of the cab stand 120. The holder 150 may be mounted to a fourth fastening hole 124 formed at the lower surface of the cab stand 120. The holder 150 may include a thread formed at the body in such a manner as to be fastened to the fourth fastening hole 124. The fourth fastening hole 124 may be formed at a protrusion 127 protrudingly formed at a lower surface of the cab stand 120, and may be located adjacent to the vibration damping mount 140. Further, the retainer 150 may have a lower end spaced apart from the upper surface of the vibration damping mount 135 by a predetermined distance when attached to the cab stand 120. The holder 150 may generate an additional supporting force by contacting the vibration damping mount 135 when the cab 110 is tilted by a lateral load, so that it is possible to prevent deformation of the cab 110.

Fig. 6 is a graph showing a comparison of the supporting force with respect to the displacement of the cab structure shown in fig. 1 and the conventional cab structure. In fig. 6, the horizontal axis represents the displacement of the cab structure when a lateral load is applied to the cab structure, and the vertical axis represents the supporting force with respect to the displacement. In fig. 6, a line La represents a supporting force of a conventional fixed type cab structure, and a line Lb represents a supporting force of a split type cab structure according to the present embodiment.

As shown in fig. 6, when a lateral load is applied to the fixed cab structure, the supporting force of the fixed cab structure is about 300 kN. In contrast, when a lateral load is applied to the split cab structure, the supporting force of the split cab structure is about 350 kN. Therefore, it can be seen that the split cab structure of the present embodiment has a stronger supporting force than the fixed cab structure.

As described above, according to the present embodiment, the support column of the cab is detachably connected to the cab base, and the separated cab, the cab base, and the main frame can be mounted on the container, so that the transportation cost of the cab structure can be reduced. Further, by connecting the pillars of the cab to the cab base via the connection mechanism, each pillar can bear a load together with the cab base and the main frame, rather than bearing a load alone. Therefore, plastic deformation of the cab structure can be suppressed.

Although the present invention has been described above with reference to the preferred embodiments thereof, those skilled in the art will appreciate that the present invention can be modified and changed in various ways without departing from the scope and spirit of the present invention as set forth in the following claims.

Claims

1. A cab structure for a construction machine, comprising:

a main frame;

a cab stand disposed on the main frame;

a cab disposed on the cab floor; and

a connecting mechanism for detachably connecting the cab and the cab stand.

2. The cab structure of a construction machine according to claim 1,

the cab includes a plurality of pillars coupled under the upper plate,

the connecting mechanism includes:

a plurality of flange portions connected to a lower end of each of the pillars; and

and a plurality of fastening members which penetrate through the first fastening holes formed in the respective flange portions and are fastened to second fastening holes formed in an upper surface of the cab stand, so that the pillars are separably connected to the cab stand.

3. The cab structure of a construction machine according to claim 2,

the connecting mechanism further comprises a plurality of reinforcing ribs configured to connect the plurality of flange portions and the plurality of pillars corresponding to each other,

each of the plurality of reinforcing ribs is in the shape of a plate connecting an upper face of each of the plurality of flange portions and a side face of each of the plurality of pillars.

4. The cab structure of a construction machine according to claim 3,

the plurality of pillars include a pair of front pillars supporting a front lower portion of the upper plate and a pair of rear pillars supporting a rear lower portion of the upper plate,

the reinforcement rib formed at the front pillar among the plurality of reinforcement ribs is shaped to extend from the front pillar toward the other front pillar that is opposed thereto.

5. The cab structure of a construction machine according to claim 4,

the reinforcing ribs formed at the rear pillars among the plurality of reinforcing ribs include a first reinforcing rib in a shape extending from the rear pillar toward another rear pillar and a second reinforcing rib in a shape extending from the rear pillar toward the front pillar.

6. The cab structure of a construction machine according to claim 2,

the fastening member includes a bolt.

7. The cab structure of a construction machine according to claim 1, further comprising:

and at least one vibration damping mount disposed between the cab platform and the main frame, the vibration damping mount damping vibration transmitted from the main frame to the cab platform.

8. The cab structure of a construction machine according to claim 1, further comprising:

at least one retainer provided on a lower surface of the cab floor so as to be spaced apart from the main frame.

9. The cab structure of a construction machine according to claim 2, further comprising:

and a lower support body connecting the flange portions to each other.

10. A construction machine is characterized in that,

comprising the cab structure according to any one of claims 1 to 9.