Sliding roller device for supporting leg of automobile crane

Abstract

The utility model discloses a sliding roller device for a support leg of an automobile crane, which comprises a shell and a roller support sleeved in the shell, a roller groove is arranged at the top of the roller support, a circular groove is vertically arranged on the roller groove along the axis, a pin shaft is inserted in the circular groove, a retainer ring is arranged between the pin shaft and the circular groove, a roller is arranged in the roller groove, and the roller is arranged in the roller groove. A positioning column is arranged at the bottom of the roller support, external threads are distributed on the periphery of the portion, away from the roller groove, of the positioning column, an elastic piece is arranged on the periphery of the positioning column in a sleeved mode, a baffle is arranged in the shell in a sleeved mode, a through hole is formed in the center of the baffle in a penetrating mode, and the positioning column penetrates through the through hole and the periphery of the external threads and is in threaded connection with an adjusting nut. One end of the adjusting nut abuts against the baffle, and the other end of the adjusting nut is provided with a fastening nut which is in threaded connection with the external threads. According to the device, not only can the gap between the supporting leg and the device be adjusted, but also the elastic piece can play an optimal buffering role, and the vertical position of the roller can be adjusted by rotating the adjusting nut.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile crane outriggers, and in particular relates to a sliding roller device for automobile crane outriggers. Background Art

[0002] A truck crane is a type of crane installed on an ordinary car chassis or a special car chassis. Its driving cab and lifting control cab are separately set. The advantages of this type of crane are good maneuverability and rapid transfer. The disadvantages are that it requires outriggers when working, cannot travel under load, and is not suitable for working on soft or muddy ground. The chassis performance of a truck crane is equivalent to that of a truck with the same gross vehicle weight, and meets the technical requirements of road vehicles. Therefore, it can pass unimpeded on all types of roads. This type of crane is generally equipped with two control cabs for getting on and off, and the outriggers must be extended to maintain stability during operation.

[0003] The outriggers of medium and large truck cranes are generally of two-stage telescopic type. When the two-stage outriggers are extended or retracted, sliders need to be added between the primary and secondary outriggers or between the primary outriggers and the frame to adjust the gap between the outriggers and the level of the outriggers themselves. As the lifting performance of the crane increases, the telescopic length and weight of the outriggers also gradually increase. When relying solely on the sliders to adjust and support the extension and retraction of the outriggers, problems such as leg extension and retraction jamming, abnormal noise during extension and retraction, and slider damage occur. In the prior art, the material of the outrigger sliders is changed to nylon or polymer materials to solve the above problems, but the effect is minimal and the above problems are not completely solved. The reason is that the working environment of the outrigger sliders is harsh, the lubrication state is not ideal or lubrication is impossible, which increases the sliding friction resistance and brings about the above problems. In summary, there is an urgent need for a sliding roller device for the outriggers of truck cranes. Utility Model Content

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the utility model provides a sliding roller device for a truck crane leg. A plurality of the sliding roller devices are arranged on the crane leg. The sliding roller device for the truck crane leg comprises a housing and a roller support sleeved in the housing. The roller support and the housing are clearance-fitted, wherein:

[0005] A wheel groove is provided on the top of the roller support, a circular groove is provided perpendicularly along the axis of the wheel groove, a pin shaft is inserted into the circular groove, a retaining ring is provided between the pin shaft and the circular groove, a roller is provided in the wheel groove, and the roller is sleeved on the outer circumference of the pin shaft;

[0006] A positioning post is provided at the bottom of the roller support, and an external thread is distributed on the outer periphery of the positioning post away from the wheel groove. An elastic member is sleeved on the outer periphery of the positioning post, and the elastic member is arranged between the positioning post and the shell. A baffle is sleeved inside the shell, and the baffle and the shell are interference fit. A through hole is opened through the center of the baffle, and the positioning post passes through the through hole. An adjusting nut is threadedly connected to the outer periphery of the external thread, and one end of the adjusting nut abuts against the end of the baffle away from the elastic member, and a fastening nut is provided on the other end, and the fastening nut is threadedly connected to the external thread.

[0007] Furthermore, in the above-mentioned sliding roller device for the support leg of a truck crane, the number of the retaining rings is two, which are respectively arranged on the outer periphery of both ends of the pin shaft.

[0008] As a specific implementation, in the above-mentioned sliding roller device for the support leg of the truck crane, the elastic member is a disc spring.

[0009] As a specific implementation, in the above-mentioned sliding roller device for the vehicle crane leg, the shell is welded to the crane leg.

[0010] The sliding roller device for the outrigger of a truck crane of the utility model has the following advantages and beneficial effects:

[0011] This device has a simple structure and is easy to assemble and disassemble. It solves the problems of wear and lubrication of the original slider and converts the sliding friction of the original slider into rolling friction of the roller. By adjusting the position of the elastic part, not only the gap between the support leg and the device can be adjusted, but also the elastic part can play an optimal buffering role. The vertical position of the roller can be adjusted by rotating the adjusting nut to suit different working conditions, and it has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only used to further understand the embodiments of the present invention and constitute part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0013] Figure 1 This is a schematic structural diagram of a sliding roller device for a truck crane outrigger in accordance with the present invention;

[0014] Figure 2 The utility model is a schematic diagram of the use state of the sliding roller device used for the outrigger of the automobile crane.

[0015] Description of reference numerals:

[0016] 1-housing, 2-roller support, 3-pin, 4-retaining ring, 5-roller, 6-positioning column, 7-elastic member, 8-baffle, 9-adjusting nut, 10-fastening nut, 100-sliding roller device. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0018] like Figure 1 、 Figure 2The utility model discloses a kind of sliding roller devices for automobile crane outrigger, multiple sliding roller devices 100 are set in crane outrigger, the specific distribution position of sliding roller device 100 needs to be set according to actual use working condition, sliding roller device 100 for automobile crane outrigger includes shell 1, roller support 2 that is sleeved in shell 1, clearance fit between roller support 2 and shell 1, wherein, roller support 2 top is provided with wheel groove (not shown in drawing), wheel groove is vertically provided with circular groove (not shown in drawing) along axis, pin shaft 3 is inserted in circular groove, stop washer 4 is arranged between pin shaft 3 and circular groove, wheel groove is provided with roller 5, more specifically, roller 5 is maintenance-free bearing support roller, roller 5 is sleeved in the outer periphery of pin shaft 3, and roller 5 can rotate freely along the axis of pin shaft 3;Roller support 2 bottom is provided with positioning column 6, and roller support 2 and positioning column 6 are integrally connected, and outer periphery of the part away from wheel groove is distributed with external thread (not shown in drawing), positioning column 6 outer periphery is sleeved with elastic element 7, and elastic element 7 is arranged between positioning column 6 and shell 1, baffle 8 is sleeved in shell 1, and interference fit between baffle 8 and shell 1, through hole (not shown in drawing) is vertically provided in the center of baffle 8, and the hole diameter of through hole is matched with the outer diameter of positioning column 6, and positioning column 6 passes through through hole, and positioning column 6 can slide in through hole, and external thread is threadedly connected with adjusting nut 9 on the outer periphery, one end of adjusting nut 9 is abutted to the end of baffle 8 away from elastic element 7, and the other end is provided with fastening nut 10, and fastening nut 10 is threadedly connected with external thread, and the inner thread (not shown in drawing) matched with external thread is arranged on the inner wall of adjusting nut 9 and fastening nut 10, in the state that fastening nut 10 is not screwed into external thread, the vertical position of roller 5 can be adjusted by rotating adjusting nut 9: forward rotation adjusting nut 9, under the joint action of external thread and the inner thread of adjusting nut 9, positioning column 6 drives roller support 2 to displace downward along axis, and then compresses elastic element 7, so that roller 5 moves downward along vertical direction, and reverse rotation adjusting nut 9, under the joint action of external thread and the inner thread of adjusting nut 9, positioning column 6 drives roller support 2 to displace upward along axis, and then makes elastic element 7 restore deformation, so that roller 5 moves upward along vertical direction.

[0019] Further, in the sliding roller device for automobile crane outrigger of the utility model, the number of stop washer 4 is 2, and is respectively arranged on the outer periphery of both ends of pin shaft 3, more specifically, stop washer 4 is hole elastic stop washer 4, by stop washer 4, pin shaft 3 can be more firmly arranged in circular groove.

[0020] As a specific embodiment, in the sliding roller device for the support leg of an automobile crane of the present invention, the elastic member 7 is a disc spring. Of course, other forms of springs can also be used as the elastic member 7 as long as they have a rebound effect. This arrangement is because the disc spring has the advantages of high rigidity and strong buffering and vibration absorption capabilities. In addition, by adjusting the arrangement order of the disc springs, their buffering capacity can also be adjusted.

[0021] As a specific embodiment, in the sliding roller device for the vehicle crane leg of the utility model, the shell 1 is welded to the crane leg. Of course, the fixing method between the shell 1 and the crane leg can also adopt other connection methods such as threaded connection, snap connection, etc., as long as the fixing effect of the shell 1 is met.

[0022] The installation process of the sliding roller device for the outrigger of an automobile crane of the present invention is as follows: first, the housing 1 is welded to the designated position on the outrigger of the crane, then the baffle 8 is installed into the housing 1, the elastic member 7 is arranged according to the actual working conditions, and placed in the housing 1 so that it is located above the baffle 8, then the roller 5 is installed into the wheel groove through the pin 3, the roller support 2 is installed into the housing 1, the positioning column 6 passes through the elastic member 7 and exits from the through hole, then the adjusting nut 9 is screwed into the external thread so that it abuts against the end face of the baffle 8, and the vertical position of the roller 5 is adjusted, then the fastening nut 10 is screwed into the external thread so that it abuts against the end face of the adjusting nut 9, thereby locking the adjusting nut 9.

[0023] In summary, compared with the prior art, the sliding roller device for the outrigger of a truck crane of the present invention has the following advantages and beneficial effects:

[0024] This device has a simple structure and is easy to assemble and disassemble. It solves the problems of wear and lubrication of the original slider and converts the sliding friction of the original slider into rolling friction of the roller 5. By adjusting the position of the elastic member 7, not only the gap between the support leg and the device can be adjusted, but also the elastic member 7 can play an optimal buffering role. In addition, the vertical position of the roller 5 can be adjusted by rotating the adjusting nut 9 to suit different working conditions, and has good practicality.

[0025] It should be noted that, in this article, unless otherwise specified and limited, the term "connection" or its synonyms should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, for those skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. At the same time, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. In addition, "front", "back", "left", "right", "up", "down" and the like in this article are referred to the placement state shown in the drawings.

[0026] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the examples, those skilled in the art should understand that: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A sliding roller device for a truck crane leg, wherein a plurality of sliding roller devices are arranged on the crane leg, characterized in that: The sliding roller device for the support leg of the automobile crane comprises a housing and a roller support sleeved in the housing, wherein the roller support and the housing are clearance-fitted, wherein: A wheel groove is provided on the top of the roller support, a circular groove is provided perpendicularly along the axis of the wheel groove, a pin shaft is inserted into the circular groove, a retaining ring is provided between the pin shaft and the circular groove, a roller is provided in the wheel groove, and the roller is sleeved on the outer circumference of the pin shaft; A positioning post is provided at the bottom of the roller support, and an external thread is distributed on the outer periphery of the positioning post away from the wheel groove. An elastic member is sleeved on the outer periphery of the positioning post, and the elastic member is arranged between the positioning post and the shell. A baffle is sleeved inside the shell, and the baffle and the shell are interference fit. A through hole is opened through the center of the baffle, and the positioning post passes through the through hole. An adjusting nut is threadedly connected to the outer periphery of the external thread, and one end of the adjusting nut abuts against the end of the baffle away from the elastic member, and a fastening nut is provided on the other end, and the fastening nut is threadedly connected to the external thread.

2. The sliding roller device for the outrigger of a truck crane according to claim 1, characterized in that: There are two retaining rings, which are respectively arranged on the outer periphery of both ends of the pin shaft.

3. The sliding roller device for the support leg of a truck crane according to claim 1, characterized in that: The elastic member is a disc spring.

4. The sliding roller device for the outrigger of a truck crane according to claim 1, characterized in that: The housing is welded to the crane leg.

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