CN111153334A - Slewing device and lorry-mounted crane - Google Patents

Abstract

The invention provides a slewing device and a lorry-mounted crane, wherein the slewing device comprises a gear shaft; the base and the gear shaft are of an integrated casting structure; and the rotary upright post is welded on the base, and the gear shaft is used for driving the rotary upright post to rotate. In the slewing device, the gear shaft and the base are integrally formed integral castings, so that the welding process between the gear shaft and the base is avoided, the machining is simple and convenient, and the stability is good when the integral castings drive the slewing upright posts to rotate together.

Description

Slewing device and lorry-mounted crane

Technical Field

The invention relates to the technical field of slewing device structures, in particular to a slewing device and a lorry-mounted crane.

Background

The lorry-mounted crane is a multi-action hoisting machine which is arranged on an automobile chassis and is used for vertically lifting and horizontally carrying heavy objects within a certain range. When the crane is in lifting operation, the crane needs to rotate continuously within a certain range to place the heavy object at a preset position. The traditional method is to use a slewing bearing to realize the rotation operation of a crane, but has the problems of difficult installation, poor stability and the like.

Disclosure of Invention

The invention aims to provide a slewing device and a lorry-mounted crane, and aims to solve the technical problems that the slewing device is difficult to install and poor in stability in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the present invention provides a turning device, including: a gear shaft; the base and the gear shaft are of an integrated casting structure; and the rotary upright post is welded on the base, and the gear shaft is used for driving the rotary upright post to rotate.

Further, the gear shaft includes gear portion, first axial region and second axial region, first axial region with the second axial region sets up respectively in the both ends of gear portion, one end of first axial region with gear portion is connected, the other end with the base is connected.

Further, a first flange is formed on the first shaft portion, and the first flange is connected to the base.

Further, the first shaft part comprises a first shaft section and a second shaft section, and two ends of the second shaft section are respectively connected with the first shaft section and the gear part; the second shaft section has a diameter smaller than a diameter of the first shaft section.

Further, a second flange is formed at one end of the gear portion connected to the first shaft portion, and the diameter of the second flange is larger than that of one end of the first shaft portion near the second flange.

Further, the base includes the pedestal and sets up in the reinforcing plate of pedestal both sides, the gyration stand weld in on the pedestal, the reinforcing plate respectively with the gear shaft is connected.

Furthermore, the cross section of the seat body is hexagonal, and an installation part connected with the rotary upright post is formed on the peripheral side of the seat body; the mounting parts comprise a first mounting part and a second mounting part which are both step-shaped, the first mounting part is formed on one side surface of the seat body, and the second mounting part is continuously formed on the other five side surfaces of the seat body; the two end parts of the second mounting part close to the first mounting part extend towards the bottom of the seat body; the surface of the reinforcing plate far away from the seat body is a cambered surface.

Furthermore, gaps are formed at two end parts of the side surface of the seat body, which is provided with the first installation part, and the gaps are connected with the rotary upright columns.

Further, the gear shaft and the base are both hollow structures.

According to another aspect of the invention, the lorry-mounted crane is further provided, and comprises a supporting seat, a driving mechanism, a rack and the rotating device, wherein the gear shaft of the rotating device is rotatably supported on the supporting seat, the rack is meshed with the gear shaft, and the driving mechanism drives the rack to reciprocate.

Furthermore, the supporting seat comprises a bearing part with an accommodating cavity, a sliding block arranged at the top end of the bearing part and a bearing arranged at the bottom of the bearing part, and one end of the gear shaft is placed in the accommodating cavity and matched with the bearing; the other end of the gear shaft is rotatably mounted on the slider.

In the slewing device provided by the invention, the gear shaft and the base are integrally formed into an integral casting, so that the welding process between the gear shaft and the base is avoided, the machining is simple and convenient, and the stability is good when the integral casting drives the slewing upright column to rotate together.

The lorry-mounted crane comprising the slewing device is provided with the rack which is meshed with the gear shaft in the slewing device, is simple in matching structure and simple and convenient to install, and drives the rack to reciprocate through the driving mechanism, so that the slewing device can freely rotate within a 360-degree range during lifting operation, and the slewing device can stably rotate, and is safe and reliable.

Drawings

Fig. 1 is a schematic structural diagram of a rotating device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the A-direction structure of the turning device shown in FIG. 1;

FIG. 3 is a schematic structural view of the gear shaft and the base shown in FIG. 1;

FIG. 4 is a side view of the gear shaft and base shown in FIG. 1;

FIG. 5 is a top view of the gear shaft and base shown in FIG. 1;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a sectional view of a rack and gear shaft meshing structure in the lorry-mounted crane provided by the embodiment of the invention;

fig. 8 is a cross-sectional view taken along line C-C of fig. 7.

Description of reference numerals:

10. a turning device; 20. a rack;

30. a supporting seat; 31. a bearing part; 32. a slider; 33. a bearing;

11. a gear shaft; 111. a gear portion; 111a, a second flange; 112. a first shaft portion; 112a, a first flange; 112b, a first shaft section; 112c, a second shaft section; 113. a second shaft portion;

12. a base; 121. a base body; 121a, a first mounting portion; 121b, a second mounting portion; 121c, a notch; 122. a reinforcing plate;

13. and (4) rotating the upright column.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. In the description of the present invention, the related orientation or positional relationship is based on the orientation or positional relationship shown in fig. 1, wherein "top" and "bottom" refer to the top-bottom direction of fig. 1. It is to be understood that such directional terms are merely used to facilitate describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be constructed and operated in a particular orientation and therefore should not be considered as limiting the invention.

In addition, the descriptions of "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number or order of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 1 to 6, in a first aspect of an embodiment of the present application, there is provided a swiveling device including a gear shaft 11; the base 12 and the gear shaft 11 are of an integrated casting structure; and a rotary upright column 13 welded on the base 12, and the gear shaft 11 is used for driving the rotary upright column 13 to rotate.

It can be understood that the gear shaft 11 has a compact structure, and has a problem of difficulty in processing when it is welded to the base 12. In the embodiment of the application, the gear shaft 11 and the base 12 are integrally formed, so that the welding procedure between the gear shaft and the base is avoided, the processing difficulty of the rotating device 10 is reduced, and the processing efficiency is improved. In addition, in this application embodiment, gyration stand 13 welds on base 12, drives gyration stand 13 through the integral type foundry goods of gear shaft 11 and base 12 and rotates, has improved the stationarity when it rotates.

In some embodiments, the gear shaft 11 includes a gear portion 111, a first shaft portion 112 and a second shaft portion 113, the first shaft portion 112 and the second shaft portion 113 are respectively disposed at two ends of the gear portion 111, one end of the first shaft portion 112 is connected with the gear portion 111, and the other end is connected with the base 12. The embodiment of the present application takes a lorry-mounted crane as an example to illustrate the connection relationship between the slewing device 10 and other structures. Referring to fig. 8, the first shaft portion 112 of the gear shaft 11 is rotatably supported on the supporting base 30 of the lorry-mounted crane, the gear portion 111 is engaged with the rack 20 of the lorry-mounted crane, and the rack 20 is driven by the driving mechanism to reciprocate and drive the gear portion 111 to rotate. It can be understood that the first shaft portion 112 and the second shaft portion 113 disposed at both ends of the gear portion 111 are configured to cooperate with the supporting seat 30, so that the rotation of the gear shaft 11 on the supporting seat 30 is more stable.

Further, a first flange 112a is formed on the first shaft portion 112, and the first flange 112a is connected to the base 12. As can be understood, the first shaft portion 112 is connected to the base 12 through the first flange 112a, and referring to fig. 4 and 6, the contact area between the first shaft portion 112 and the base 12 is increased, so that the structural strength of the integrally formed casting of the gear shaft 11 and the base 12 is increased, and the stability during rotation is improved.

In other embodiments, the first shaft portion 112 includes a first shaft segment 112b and a second shaft segment 112c, and both ends of the second shaft segment 112c are respectively connected to the first shaft segment 112b and the gear portion 111; the second shaft section 112c has a smaller diameter than the first shaft section 112 b. That is, referring to fig. 3 and 4, the first shaft 112 is formed with one stepped portion, and the diameter of the first shaft 112 between the stepped portion and the gear portion 111 is smaller than the diameter of the first shaft 112 between the stepped portion and the base 12. The structure setting of two shaft sections on first axial region 112 in this application embodiment makes gear shaft 11 can cooperate better with lorry crane's supporting seat 30, and assembly efficiency is higher.

In some embodiments, the gear portion 111 has a second flange 111a formed at an end thereof connected to the first shaft portion 112, and the diameter of the second flange 111a is larger than that of an end of the first shaft portion 112 near the second flange 111a, as shown in fig. 4, 6, and 8. In the embodiment of the application, when the gear shaft 11 of the slewing device 10 is matched with the supporting seat 30 of the lorry-mounted crane, the supporting seat 30 is provided with the pin shaft and the second flange 111a in butt joint, so that the gear shaft 11 is limited, the gear shaft 11 is prevented from being separated from the supporting seat 30, and the slewing of the slewing device 10 on the supporting seat 30 is ensured.

In some embodiments, the base 12 includes a base body 121 and reinforcing plates 122 disposed on two sides of the base body 121, the rotating column 13 is welded on the base body 121, and the base body 121 and the reinforcing plates 122 are respectively connected to the gear shaft 11, as shown in fig. 5 and 6. It can be understood that the base body 121 is connected to the rotating column 13 to rotate the rotating column 13 under the driving of the gear shaft 11. The reinforcing plates 122 disposed at both sides of the housing 121 are used to increase the contact area between the base 12 and the gear shaft 11, so that the top end of the first shaft 112 is completely contacted with the base 12 even though the first flange 112a is completely contacted with the base 12, thereby increasing the overall strength of the base 12 and the gear shaft 11. It can be understood that the cross section of the first shaft portion 112 and the cross section of the first flange 112a on the gear shaft 11 are generally circular, the structure of the bottom of the seat body 121 is different from the structure of the first flange 112a, and the reinforcing plate 122 is used to supplement the difference between the two structures.

In some embodiments, referring to fig. 5, the cross section of the seat body 121 is hexagonal, and the peripheral side of the seat body 121 is formed with a mounting portion connected with the rotation column 13; the mounting portions include a first mounting portion 121a and a second mounting portion 121b both having a step shape, the first mounting portion 121a is formed on one side surface of the seat body 121, and the second mounting portion 121b is continuously formed on the remaining five side surfaces of the seat body 121; the two end parts of the second mounting part 121b close to the first mounting part 121a extend to the bottom of the seat body 121; the outer side of the reinforcing plate 122, i.e. the side far away from the seat body 121, is an arc surface.

It can be understood that the first mounting portion 121a and the second mounting portion 121b are used for connecting the seat body 121 and the rotating column 13, and the structure of the first mounting portion 121a and the second mounting portion 121b is set according to the structure of the rotating column 13. The two end portions of the second mounting portion 121b close to the first mounting portion 121a form a certain slope extending toward the bottom of the seat body 121, so as to be better connected with the bottom structure of the rotating column 13 in a matching manner. In addition, the cross-sectional shape of the seat body 121 is set to be hexagonal to enhance the supporting strength of the seat body 121 to the rotating column 13, and the cross-sectional structure of the seat body 121 is different from the circular cross-sectional structure of the first flange 112a, so that the side of the reinforcing plate 122 away from the seat body 121 is set to be a cambered surface to supplement the cross-sectional structure of the seat body 121, so that the top end of the first flange 112a is in complete contact with the base 12, the rotational stability of the gear shaft 11 is improved, and the overall strength of the gear shaft 11 and the base 12 is enhanced.

In some embodiments, referring to fig. 2 and 5, notches 121c are respectively formed at two end portions of the side surface of the seat body 121 on which the first mounting portion 121a is disposed, and the notches 121c are connected to the rotating column 13. It can be understood that, the two side vertical plates of the rotating upright 13 are connected with oil cylinders, and in order to enhance the strength of the two side vertical plates, a reinforcing vertical plate is generally disposed on the inner side of each of the two side vertical plates. Two notches 121c arranged on the base body 121 are used for welding the base body 121 and the two reinforcing vertical plates, so that the connection strength between the rotating upright post 13 and the base body 121 is enhanced, and meanwhile, the oil cylinder can be more stably supported.

In some embodiments, referring to fig. 6 and 8, the gear shaft 11 and the base 12 are both hollow structures. It will be appreciated that the gear shaft 11 and the base 12 are provided as hollow structures to facilitate the routing of the pipes therein, while reducing the weight of both. Wherein, the pedestal 121 is formed with the hollow structure who runs through its top and bottom, is formed with two step portions on the pedestal 121 inner wall that hollow structure corresponds, makes the diameter of inner wall have three kinds of sizes, and reduces to the bottom diameter size by the top of inner wall to make the diameter of pedestal 121 inner wall bottom and the diameter of the ring shape cross section inner ring of first flange 112a on the first axle part 112 be close to or the same, increase the area of contact of base 12 and gear shaft 11, improve bulk strength.

Referring to fig. 7 and 8, in a second aspect of the embodiments of the present application, there is provided a lorry-mounted crane, which includes a supporting seat 30, a driving mechanism, a rack 20 and a rotating device in the above embodiments, wherein a gear shaft 11 of the rotating device 10 is rotatably supported on the supporting seat 30, the rack 20 is engaged with the gear shaft 11, and the driving mechanism drives the rack 20 to reciprocate.

It will be understood that the rack 20 reciprocates and can rotate the gear shaft 11 engaged therewith. The gear shaft 11 is supported on the supporting seat 30, and the gear shaft 11 and the base 12 are of an integral casting structure, so that a welding process between the gear shaft 11 and the base 12 is avoided, the processing is simple and convenient, and the rotation stability of the rotating device 10 can be ensured. The lorry-mounted crane provided by the embodiment of the application has the advantages that the rack 20 and the gear shaft 11 are matched, the structure is simple and the installation is simple and convenient, the rack 20 is driven to reciprocate by the driving mechanism, the slewing device 10 can rotate freely within the range of 360 degrees when the lifting operation is carried out, and the slewing device 10 is stable in rotation, safe and reliable.

In some embodiments, referring to fig. 8, the supporting seat 30 includes a bearing portion 31 formed with a receiving cavity, a slider 32 disposed at a top end of the bearing portion 31, and a bearing 33 disposed at a bottom of the bearing portion 31, and one end of the gear shaft 11 is placed in the receiving cavity to be matched with the bearing 33; the other end of the gear shaft 11 is rotatably mounted on the slider 32.

It will be understood that the bottom end of the first flange 112a on the gear shaft 11 is rotatably mounted with the slider 32 at the top end of the bearing portion 31 to ensure stable rotation of the gear shaft 11. The gear shaft 11 and the bearing part 31 are made of the same material, and are generally made of steel, and if the gear shaft 11 is directly supported on the bearing part 31, the rotation cannot be realized. A slide block 32 is installed at the top end of the bearing part 31, wherein the slide block 32 is made of a wear-resistant polymer compound with high specific pressure, and the bottom end of the first flange 112a is in contact with the slide block 32, so that the gear shaft 11 and the bearing part 31 can rotate relatively. Specifically, the slider 32 has a circular cross-section.

In addition, the gear shaft 11 on the lorry-mounted crane is placed in the accommodating cavity of the bearing part 31, and the outer diameter of the gear shaft 11 is continuously reduced from the first shaft section 112b, the second shaft section 112c, the gear part 111 to the second shaft part 113, so that the gear shaft 11 can be conveniently placed into the accommodating cavity. Referring to fig. 8, the lower portion of the gear shaft 11, i.e. the second shaft portion 113, is engaged with the bearing 33 inside the supporting seat 30, and specifically, the bearing 33 may be a cylindrical roller bearing 33 for bearing a lateral force when the gear shaft 11 rotates, so as to maintain a force balance when the gear shaft 11 rotates. It can be understood that the diameter of the second flange 111a of the gear portion 111 is larger than the diameter of the bottom end of the first shaft portion 112, and the supporting seat 30 is internally provided with a pin which abuts against the second flange 111a to limit the gear shaft 11, so that the gear shaft 11 can be prevented from being separated from the accommodating cavity after being assembled into the accommodating cavity, and the assembly stability between the rotary device 10 and the supporting seat 30 is ensured.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (11)

1. A swing apparatus, comprising:

a gear shaft;

the base and the gear shaft are of an integrated casting structure; and

the rotary upright post is welded on the base, and the gear shaft is used for driving the rotary upright post to rotate.

2. The swivel device according to claim 1, wherein the gear shaft comprises a gear portion, a first shaft portion and a second shaft portion, the first shaft portion and the second shaft portion are respectively provided at both ends of the gear portion, one end of the first shaft portion is connected to the gear portion, and the other end is connected to the base.

3. The swivel device of claim 2, wherein the first shaft portion has a first flange formed thereon, the first flange being connected to the base.

4. The swivel device of claim 2, wherein the first shaft portion comprises a first shaft segment and a second shaft segment, and both ends of the second shaft segment are respectively connected with the first shaft segment and the gear portion; the second shaft section has a diameter smaller than a diameter of the first shaft section.

5. The swivel device according to claim 2, wherein a second flange having a diameter larger than that of an end of the first shaft portion near the second flange is formed at an end of the gear portion connected to the first shaft portion.

6. The rotating device according to any one of claims 1 to 5, wherein the base includes a base body and reinforcing plates disposed on two sides of the base body, the rotating column is welded to the base body, and the base body and the reinforcing plates are respectively connected to the gear shaft.

7. The swivel device according to claim 6, wherein the seat body has a hexagonal cross section, and a mounting portion connected to the swivel post is formed on a peripheral side of the seat body; the mounting parts comprise a first mounting part and a second mounting part which are both step-shaped, the first mounting part is formed on one side surface of the seat body, and the second mounting part is continuously formed on the other five side surfaces of the seat body; the two end parts of the second mounting part close to the first mounting part extend towards the bottom of the seat body; the surface of the reinforcing plate far away from the seat body is a cambered surface.

8. The swivel device as claimed in claim 7, wherein notches are formed at two end portions of the side surface of the seat body on which the first mounting portion is provided, respectively, and the notches are connected to the swivel post.

9. The swiveling device according to any one of claims 1 to 5, wherein the gear shaft and the base are both hollow.

10. A lorry-mounted crane, comprising a support base, a driving mechanism, a rack and the slewing device as claimed in any one of claims 1 to 9, wherein the gear shaft of the slewing device is rotatably supported on the support base, the rack is engaged with the gear shaft, and the driving mechanism drives the rack to reciprocate.

11. The lorry-mounted crane according to claim 10, wherein the supporting seat comprises a bearing part formed with a containing cavity, a sliding block arranged at the top end of the bearing part and a bearing arranged at the bottom of the bearing part, and one end of the gear shaft is placed in the containing cavity to be matched with the bearing; the other end of the gear shaft is rotatably mounted on the slider.

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