Abstract:
A cab rear mounting device includes: a pair of posts disposed at a predetermined interval in a width direction of a vehicle, and fixedly mounted to a vehicle body; strikers mounted to the pair of posts, respectively; a pair of locking devices mounted to the cab, and coupled to each striker to be locked, so as to fix the cab to the vehicle body, or separated from each striker to be unlocked, so as to release the cab from the vehicle body; and damper devices mounted to the posts, respectively, and configured to absorb vibration or shock, thereby promoting a decrease in the number of components, and weight and cost of the vehicle.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application claims priority of Korean Patent Application Number 10-2013-0065502 filed Jun. 7, 2013, the entire contents of which application is incorporated herein for all purposes by this reference. 
     BACKGROUND OF INVENTION 
     1. Field of Invention 
     The present invention relates to a cab rear mounting device, which detachably mounts a rear side of a cab of a common vehicle, such as a truck, to a vehicle body. 
     2. Description of Related Art 
     In general, a cab mounted onto a large truck, such as a vehicle with cargo, is mounted so as to be tilted at a predetermined angle in a front direction of a vehicle, such that a device, such as an engine or a transmission, which is installed at a lower portion of the cab, can be repaired and checked. 
     A cab mounting device in the related art includes a front hinge device rotatably mounting a front side of the cab to a vehicle body, and a rear mounting device detachably mounting a rear side of the cab to the vehicle body, and the rear side of the cab is separated from the vehicle body through the rear mounting device, and then the cab is tilted at a predetermined angle in a front direction of the vehicle through the front hinge device. 
     Further, the cab mounting device in the related art appropriately absorbs vibration or shock of the vehicle generated due to an uneven road surface while the vehicle travels, so as to prevent the vibration or the shock from being transmitted to the cab as far as possible, thereby serving to decrease driving fatigue of a driver or a passenger riding in the cab. 
     The rear mounting device in the cab mounting device in the related art includes a type using a rigid rubber, a type using a cushion oil rubber, a type using a coil spring and a shock absorber, or a type using an air spring and a shock absorber. 
     However, the rear mounting device of the cab in the related art, which detachably mounts the rear side of the cab to the vehicle has a complex shape and structure, and uses a rubber mounted in a height direction of the vehicle, so that there is a drawback in that mounting workability and ride comfort are poor, and weight of the vehicle is increased. 
     The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. 
     BRIEF SUMMARY 
     Various aspects of the present invention provide for a cab rear mounting device, which has a simple structure, thereby promoting a decrease in weight and cost of a vehicle, improving mounting workability, and improving rid comfort. 
     Various aspects of the present invention provide for a cab rear mounting device including: a pair of posts disposed at a predetermined interval in a width direction of a vehicle, and fixedly mounted to a vehicle body; strikers mounted to the pair of posts, respectively; a pair of locking devices mounted to the cab, and coupled to each striker to be locked, so as to fix the cab to the vehicle body, or separated from each striker to be unlocked, so as to release the cab from the vehicle body; and damper devices mounted to the posts, respectively, and configured to absorb vibration or shock. 
     The vehicle body may include one or more vehicle body frames disposed at a predetermined interval in a width direction of the vehicle, and the posts may be fixedly mounted to the one or more vehicle body frames, respectively. 
     The cab rear mounting device may further include an operation bar connected with the pair of locking devices and configured to simultaneously lock or unlock the pair of locking devices. 
     An operation handle may be provided at a front end portion of the operation bar, and a key set, which is operable only by a starting key of the vehicle in order to restrict an operation of the operation handle, may be installed at a portion adjacent to the operation handle. 
     The pair of posts may be provided with hooks shaped like a letter “           ” protruding in a vertical direction, respectively, and the cab may be provided with a safety hook detachably coupled to the hook.
     A mounting bracket may be fixedly mounted to a rear lower portion of the cab, and the safety hook and the locking device may be mounted to the mounting bracket. 
     The damper device may be disposed and mounted at front and rear sides of each of the pair of posts in a longitudinal direction of the vehicle, and include a pair of bushes integrally connected by the striker. 
     Each of the pair of posts may include a post body approximately shaped like a bracket having a length relatively larger than a width, a pair of extended portions formed at upper portions of the post bodies in a height direction of the post body while being widened to both left and right sides, and a pair of mounting parts shaped like a cylinder, integrally formed at the pair of extended portions, and having both opened side surfaces, and the pair of bushes may be inserted into and mounted at the pair of mounting parts, respectively. 
     The damper device may further include a shock absorber mounted to the post to be connected with the striker. 
     A pair of connection parts may be installed while being fitted to external circumferences of the striker, a mounting flange may be inserted into a lower portion of the post body in a height direction of the post body to be integrally fixed and attached to the post body, a mounting bolt may be fastened while passing through the mounting flange, a lower portion of the shock absorber is mounted through the mounting bolt, a link bracket shaped like a letter “V” may be fixedly attached to the pair of connection parts, and an upper portion of the shock absorber may be fastened to the link bracket. 
     The locking device may include a latch housing mounted to the mounting bracket of the cab, a first latch accommodated inside the latch housing, and rotatably installed so as to be coupled to or separated from the striker, and a second latch rotatably installed inside the latch housing so as to be coupled to or separated from the first latch, and connected with the operation bar so as to interwork with the operation bar. 
     According to the cab rear mounting device according to the exemplary embodiment of the present invention, it is possible to improve ride comfort and a degree of tuning freedom by decreasing mounting stiffness by the pair of bushes disposed in the longitudinal direction of the vehicle, and it is possible to selectively adjust cost and ride comfort of the rear mounting device because the shock absorber is detachable. 
     Further, it is possible to simplify a shape of the rear lower portion of the cab, and to simplify a structure of the mounting part of the locking device, which selectively locks the rear side of the cab to the vehicle body, thereby promoting a decrease in a molding operation and workability improvement. 
     Further, it is possible to promote a decrease in weight and cost of the vehicle by simplifying the structure by using the separable posts separated and disposed at both left and right sides in the width direction of the vehicle. 
     Further, since a structure of the locking device, which detachably locks the rear side of the cab to the vehicle body, is simple, it is possible to improve workability, and it is possible to improve operating reliability due to uniform locking tension. 
     The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating a state in which an exemplary cab rear mounting device according to the present invention is mounted to a rear lower portion of a cab. 
         FIG. 2  is a perspective view of the lower portion of the rear side of the cab to which the exemplary cab rear mounting device according to the present invention is mounted. 
         FIG. 3  is a front view of an exemplary post according to the present invention. 
         FIG. 4  is a perspective view of an exemplary post according to the present invention. 
         FIG. 5  is a front view of an exemplary post according to the present invention. 
         FIG. 6  is a front view of an exemplary locking device including an exemplary latch according to the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims. 
     Referring to  FIGS. 1 and 2 , a cab rear mounting device according to various embodiments of the present invention may detachably mount a rear side of a cab  10  including a riding space with a predetermined size, in which a driver, and the like, may get, to a vehicle body. 
     That is, the cab  10  may be detachably mounted to a pair of vehicle body frames  20  configuring a vehicle body, formed to be extended in a longitudinal direction of the vehicle, and disposed at a predetermined interval in a width direction of the vehicle. 
     The cab rear mounting device may include a pair of separable posts  30  fixedly mounted to be perpendicular to the pair of vehicle body frames  20 , and formed to be extended in a height direction of the vehicle. 
     When one pair of separable posts is used as described above, it is possible to simplify a structure of the rear mounting device, and decrease weight and cost of the rear mounting device. 
     One pair of locking devices  40  fastened to the pair of posts  30  to fix the cab  10  to the pair of vehicle body frames  20 , or separated from the pair of posts  30  to detach the cab  10  from the vehicle body frames  20  may be mounted on the cab  10 . 
     An operation bar  50 , which is connected with the pair of locking devices  40  to simultaneously lock or unlock the pair of locking devices  40 , may be provided. 
     The operation bar  50  is formed to be extended in the width direction of the vehicle, and may have one front end connected with one locking device  40 , and have the other front end provided with an operation knob  52  enabling an operator to easily grip and operate the operation bar  50 . 
     Each of the pair of posts  30  is provided with a hook  60  approximately shaped like a letter “           ” protruding in a vertical direction, and a rear lower portion of the cab  10  is provided with a safety hook  70  detachably coupled to the hook  60 .
     A mounting bracket  12  is fixedly mounted at the rear lower portion of the cab  10 , the mounting bracket  12  is provided with a plurality of fastening holes  121 , and the safety hook  70  may be rotatably mounted in the fastening holes  121  through a hinge pin  72 . 
     Only the mounting bracket  12  for mounting the locking device  40  is simply mounted at the rear lower portion of the cab  10 , so that it is possible to simplify a shape of the cab  10  as compared to the related art, and thus it is possible to decrease a mold work process, and improve productivity. 
     Referring to  FIG. 3 , each of the pair of posts  30  may include a post body  32  shaped like an approximate bracket having a relatively larger length than a width. 
     A pair of extended portions  321  widened in left and right directions may be integrally formed at upper portions of the post bodies  32  in a height direction thereof, and a pair of mounting parts  322  having opened both sides and having a cylindrical shape may be integrally formed at the pair of extended portions  321 . 
     A pair of bushes  34  approximately shaped like a cylinder and formed of rubber may be inserted into and mounted at the pair of mounting parts  322 , respectively. (See  FIG. 4 ) 
     The pair of bushes  34  may form a damper device, and may be connected with each other through a striker  36  fastened while passing through centers thereof. 
     A stopper plate  38  may be installed at the pair of mounting parts  322  in order to prevent the pair of bushes  34  inserted into the pair of mounting parts  322  from being separated from the mounting parts  322 . 
     A pair of connection parts  361  may be installed at external circumferences of the striker  36  while being fitted to the external circumferences of the striker  36 . 
     The pair of connection parts  361  may be disposed to be spaced apart from each other in an axis direction of the striker  36 . 
     A mounting flange  323  may be inserted into a lower portion in a height direction of the post body  32  to be integrally and fixedly attached to the post body  32 . 
     A mounting bolt  324  may be fastened while passing through the mounting flange  323 . 
     The pair of bushes  34  is disposed at the pair of posts  30  while being spaced apart from each other in a longitudinal direction of the vehicle by the pair of mounting parts  322 . 
     Each of the pair of bushes  34  is accurately operated in three axes directions of the longitudinal direction, the height direction, and the width direction of the vehicle, stiffness thereof is easily adjusted, and each of the pair of bushes  34  is independently operated, thereby improving ride comfort. 
       FIGS. 4 and 5  illustrate the post according to another exemplary embodiment, and a lower portion of a shock absorber  80  is fastened to and supported by the mounting bolt  324 , and an upper portion of the shock absorber  80  is connected with the pair of connection parts  361  through a link bracket  82  approximately shaped like a letter “V”. 
     That is, an upper end of the shock absorber  80  is fastened to the lower portion of the link bracket  82  while passing through the lower portion of the link bracket  82 , and both upper portions of the link bracket  82  may be integrally connected to the pair of connection parts  361  by a method, such as welding. 
     The shock absorber  80  forms the damper device together with the pair of bushes  34 . 
     When the shock absorber  80  is mounted to the post  30  as described above, the shock absorber  80  absorbs and decreases vibration and shock, thereby further improving ride comfort. 
     Further, the shock absorber  80  may be optionally mounted to the post  30  according to various embodiments as shown in  FIG. 3 , so that it is possible to dualize a price of the cab rear mounting device. 
     Referring to  FIG. 6 , the locking device  40  may include a latch housing  42  fastened and mounted to the mounting bracket  12  of the cab  10  through the plurality of fastening holes  121 , a first latch  44  accommodate inside the latch housing  42  and rotatably installed so as to be coupled to or separated from the striker  36 , and a second latch  46  rotatably installed inside the latch housing  42  so as to be coupled to or separated from the first latch  44 , and connected with the operation bar  50  so as to interwork with the operation bar  50 . 
     Each of the first latch  44  and the second latch  46  may be fastened to the latch housing  42  through a pin  48  to be rotatably supported. 
     When the cab  10  moves down toward the vehicle body, the first latch  44  of the locking device  40  mounted to the cab  10  is coupled to and caught by the striker  36  of the post  30  installed at the vehicle body frame  20 , and in this state, when the second latch  46  is coupled to the first latch  44  by operating the operation bar  50 , the cab  10  may be detachably coupled to and supported by the vehicle body frame  20  through the locking device  40  by means of the post  30 . 
     The aforementioned locking device  40  has a simple structure, so that it is possible to improve workability, simplify even a structure of a cab mounting portion , and promote uniform locking tension. 
     An operation handle  54  is connected to one front end portion of the operation bar  50 , and a key set  56  is installed at a portion adjacent to the operation handle  54 , so that only a person possessing a starting key of the vehicle is allowed to operate the operation handle  54 , thereby enhancing stability of a tilting operation of the cab. 
     While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. 
     For convenience in explanation and accurate definition in the appended claims, the terms upper or lower, front or rear, left or right, and etc. are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures. 
     The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.