Rotary table, tail structure of rotary table and mining excavator

Abstract

The utility model discloses a rotary table, a tail structure of the rotary table and a mining excavator. The rotary table comprises a lower bottom plate, a right side supporting plate structure, a left side supporting plate structure, two tail mounting plates and at least one connecting plate, wherein the right side supporting plate structure and the left side supporting plate structure are welded on the lower bottom plate; the two tail mounting plates are oppositely welded to the tail of the right side supporting plate structure and the tail of the left side supporting plate structure, and the welding amount of the plates at the welding connection positions is increased by forming grooves, so that complete penetration is achieved, and the bearing strength and the torsion resistance are better. The two tail mounting plates are independent plates, and sufficient base metal allowance can be reserved above the two tail mounting plates for machining so as to ensure the form and location tolerance of mounting of the two tail mounting plates; and at least one connecting plate is welded with the two tail mounting plates and the lower bottom plate. The rotary table tail structure is simple in structure, small plates are used, and the utilization rate of the plates is increased.

Description

Technical Field

[0001] The utility model relates to a tail structure of a turntable, belonging to the technical field of mining excavators. Background Art

[0002] Existing hydraulic excavators all have a slewing platform structure for bearing the weights of components on the upper part of the vehicle; it is composed of a turntable main body and left and right skirt frames; the tail structure of the turntable main body is mainly used for installing and fixing a counterweight and for hoisting. The turntable main body of existing mining hydraulic excavators bears a large mass on the upper part of the vehicle. And with the increase in vehicle configurations and the trend of the bucket capacity of the bucket becoming larger and larger, the impact on the turntable main body structure during operations such as vehicle slewing is large, and the counterweight is heavy, and the impact load during work and slewing is extremely large, which poses higher requirements for the structural strength of the turntable main body, especially the tail of the turntable main body far from the slewing center.

[0003] The tail structure of the turntable main body of existing hydraulic excavators is generally as follows: the vertical plate is an integral vertical plate penetrating from the front end to the rear end of the turntable, the lower part is an integral lower bottom plate, and the upper part is an integral upper top plate, and the cross-section forms an "I" structure; the structure for fixing the counterweight at the rear side is to open holes on the upper top plate and the lower bottom plate, and then weld round tubes between them for passing the fixing bolts of the counterweight; the disadvantages of this structure are: poor torsional resistance after welding, and it is difficult to control the form and position tolerances such as the parallelism of the counterweight installation surface, and the upper top surface is not easy to machine. Content of the Utility Model

[0004] In view of the deficiencies of the existing technology, the utility model provides a tail structure of a turntable. The two tail mounting plates are independent plates, which are provided with counterweight bolt through holes in the vertical direction and lifting holes in the horizontal direction; the front of the tail mounting plates is welded to the vertical plate, and the upper and lower surfaces are respectively welded to the upper top plate and the lower bottom plate, and the structural strength is better; after the two tail mounting plates are welded to the turntable main body, the counterweight bolt through holes are machined after welding to ensure the form and position tolerances of their counterweight installation, making the installation more fitting, with good stability, and eliminating the need for welding lugs on the upper top plate, saving plates, space and being more beautiful.

[0005] The utility model is implemented according to the following technical solutions:

[0006] In a first aspect, the utility model provides a tail structure of a turntable, including a lower bottom plate and a right support plate structure, a left support plate structure, two tail mounting plates for installing a counterweight, and at least one connecting plate welded thereon; the two tail mounting plates are oppositely welded to the tails of the right support plate structure and the left support plate structure, and the plates at the welded connection are provided with bevels to increase their welding amount; a set cutting allowance is reserved above the tail mounting plates for machining to ensure the form and position tolerances of their installation; at least one connecting plate is welded to the two tail mounting plates and the lower bottom plate together.

[0007] In some embodiments, the right support plate structure is formed by welding a right vertical plate and a right upper top plate, and the plates at the welded joint are provided with bevels to increase the welding amount; the plates at the welded joint between the right vertical plate and the lower bottom plate are provided with bevels to increase the welding amount.

[0008] In some embodiments, the front vertical surface of the right tail mounting plate is welded to the right vertical plate, and the plates at the welded joint are provided with bevels to increase the welding amount; a step is provided on the top surface of the right tail mounting plate near its front vertical surface, the right upper top plate extends backward to the step and is welded to the step, and the plates at the welded joint are provided with bevels to increase the welding amount; a protrusion extending downward is provided on the bottom surface of the right tail mounting plate near its front vertical surface, and the protrusion is welded to the lower bottom plate.

[0009] In some embodiments, the left support plate structure is formed by welding a left vertical plate and a left upper top plate, and the plates at the welded joint are provided with bevels to increase the welding amount; the plates at the welded joint between the left vertical plate and the lower bottom plate are provided with bevels to increase the welding amount.

[0010] In some embodiments, the front vertical surface of the left tail mounting plate is welded to the left vertical plate, and the plates at the welded joint are provided with bevels to increase the welding amount; a step is provided on the top surface of the left tail mounting plate near its front vertical surface, the left upper top plate extends backward to the step and is welded to the step, and the plates at the welded joint are provided with bevels to increase the welding amount; a protrusion extending downward is provided on the bottom surface of the left tail mounting plate near its front vertical surface, and the protrusion is welded to the lower bottom plate.

[0011] In some embodiments, a plurality of counterweight bolt through holes are spaced apart in the vertical direction on the tail mounting plate, and the counterweight bolt through holes are machined after the welding of the turntable tail structure is completed.

[0012] In some embodiments, at least one lifting hole is provided in the horizontal direction on the tail mounting plate, and the lifting hole is machined after the welding of the turntable tail structure is completed.

[0013] In some embodiments, the top surface of the connecting plate is set as a concave arc surface that is high at both ends and low in the middle.

[0014] In a second aspect, the present invention provides a turntable, including the above-mentioned turntable tail structure.

[0015] In a third aspect, the present invention provides a mining excavator, including the above-mentioned turntable.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The present utility model innovatively designs a tail structure of a turntable, which is welded by upper top plates on the left and right sides, vertical plates on the left and right sides, a lower bottom plate, a connecting plate and tail mounting plates on the left and right sides. Grooves are added at the welded joints to increase the welding amount, so as to achieve complete penetration, better load-bearing strength and torsional resistance.

[0018] 2. In the present utility model, the two tail mounting plates are independent plates, and sufficient base material allowance can be left above for machining to ensure the geometric tolerances of their installation; after the turntable body is welded, machining of the through holes for counterweight bolts in the vertical direction and hoisting holes in the horizontal direction on the tail mounting plates is carried out, so that the geometric tolerances such as perpendicularity and parallelism of these holes can also be well guaranteed.

[0019] 3. In the present utility model, hoisting holes are opened on the tail mounting plates, eliminating the need for welding of lifting lugs on the upper top plate of the turntable, saving plates, space and being more aesthetically pleasing.

[0020] 4. Using this kind of tail structure of the turntable, the structure is simple, less plates are used, and the utilization rate of plates is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0022] In the drawings:

[0023] Figure 1 is a schematic diagram of the tail structure of the turntable of the present utility model Figure 1 ;

[0024] Figure 2 is a schematic diagram of the tail structure of the turntable of the present utility model Figure 2 ;

[0025] Figure 3 is a schematic diagram of the turntable structure of the present utility model.

[0026] Reference numerals in the drawings: upper top plate on the right side 1, vertical plate on the right side 2, tail mounting plate on the right side 3, lower bottom plate 4, upper top plate on the left side 5, vertical plate on the left side 6, tail mounting plate on the left side 7, connecting plate 8, tail structure of the turntable 100.

[0027] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the inventive concept of the present utility model in any way, but rather to illustrate the concept of the present utility model to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] As Figure 1 、 Figure 2 shown, a turntable tail structure includes a lower bottom plate 4 and a right side support plate structure, a left side support plate structure welded thereto, two tail mounting plates for mounting counterweights, and at least one connecting plate 8; the two tail mounting plates 3, 7 are welded oppositely at the tails of the right side support plate structure and the left side support plate structure, and the plates at the welded joint are grooved to increase the welding amount; a set cutting allowance is reserved above the tail mounting plates 3, 7 for machining to ensure the geometric tolerances of their installation; at least one connecting plate 8 is welded to the two tail mounting plates 3, 7 and the lower bottom plate 4.

[0032] The following further describes the above-mentioned right side support plate structure.

[0033] Continue to refer to Figure 1 、 Figure 2As shown, the right support plate structure is formed by welding the right vertical plate 2 and the right upper top plate 1, and the plates at the welded joints are grooved to increase the welding amount; the plates at the welded joint between the right vertical plate 2 and the lower bottom plate 4 are grooved to increase the welding amount.

[0034] For a further solution, continue to refer to Figure 1 、 Figure 2 As shown, the front vertical surface of the right tail mounting plate 3 is welded to the right vertical plate 2, and the plates at the welded joints are grooved to increase the welding amount; a step is provided on the top surface of the right tail mounting plate 3 near its front vertical surface, and the right upper top plate 1 extends backward to the step and is welded to the step, and the plates at the welded joints are grooved to increase the welding amount; a protrusion extending downward is provided on the bottom surface of the right tail mounting plate 3 near its front vertical surface, and the protrusion is welded to the lower bottom plate 4.

[0035] The left support plate structure described above will be further described below.

[0036] Continue to refer to Figure 1 、 Figure 2 As shown, the left support plate structure is formed by welding the left vertical plate 6 and the left upper top plate 5, and the plates at the welded joints are grooved to increase the welding amount; the plates at the welded joint between the left vertical plate 6 and the lower bottom plate 4 are grooved to increase the welding amount.

[0037] For a further solution, continue to refer to Figure 1 、 Figure 2 As shown, the front vertical surface of the left tail mounting plate 7 is welded to the left vertical plate 6, and the plates at the welded joints are grooved to increase the welding amount; a step is provided on the top surface of the left tail mounting plate 7 near its front vertical surface, and the left upper top plate 5 extends backward to the step and is welded to the step, and the plates at the welded joints are grooved to increase the welding amount; a protrusion extending downward is provided on the bottom surface of the left tail mounting plate 7 near its front vertical surface, and the protrusion is welded to the lower bottom plate 4.

[0038] The tail mounting plate described above will be further described below.

[0039] Continue to refer to Figure 1 、 Figure 2 As shown, a plurality of weight bolt through holes are provided at intervals in the vertical direction on the tail mounting plates 3 and 7, and the weight bolt through holes are machined after the welding of the turntable tail structure is completed.

[0040] Continue to refer to Figure 1 、 Figure 2As shown, at least one lifting hole is provided on the tail mounting plates 3 and 7 in the horizontal direction, and the lifting hole is machined after the welding of the turntable tail structure is completed.

[0041] In a further solution, a chamfer is provided at the edge of the lifting hole.

[0042] Continue to refer to Figure 2 As shown, the top surface of the connecting plate 8 is set as a concave arc surface that is high at both ends and low in the middle.

[0043] In summary, the present utility model innovatively designs a turntable tail structure, which is welded by left and right upper side plates, left and right side vertical plates, a lower bottom plate, a connecting plate and left and right side tail mounting plates. Grooves are added at the welded joints to increase the welding amount, so as to achieve complete penetration, better load-bearing strength and torsional resistance. In the present utility model, the two tail mounting plates are independent plates, and sufficient base material allowance can be left above for machining to ensure the geometric tolerances of their installation; after the welding of the turntable main body, the machining of the through holes for the counterweight bolts in the vertical direction and the lifting holes in the horizontal direction on the tail mounting plates is carried out, so that the geometric tolerances such as the perpendicularity and parallelism of these holes can also be well guaranteed. In the present utility model, lifting holes are provided on the tail mounting plates, eliminating the need for welding of lifting lugs on the upper top plate of the turntable, saving plates, space and being more beautiful. Using this kind of turntable tail structure, the structure is simple, less plate is used, and the utilization rate of the plate is increased.

[0044] The turntable provided by the present utility model will be described below. The turntable described below can be mutually corresponded and referred to the turntable tail structure described above.

[0045] As Figure 3 shown, a turntable provided by the present utility model may include the turntable tail structure 100 as described in any one of the above embodiments.

[0046] The beneficial effects achieved by the turntable provided by the present utility model are consistent with those achieved by the turntable tail structure provided by the present utility model, so they will not be elaborated here.

[0047] The mining excavator provided by the present utility model will be described below. The mining excavator described below can be mutually corresponded and referred to the turntable described above.

[0048] A mining excavator provided by the present utility model may include the turntable as described in any one of the above embodiments.

[0049] The beneficial effects achieved by the mining excavator provided by the present utility model are consistent with those achieved by the turntable provided by the present utility model, so they will not be elaborated here.

[0050] In the description provided herein, a number of specific details are set forth. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure an understanding of the description.

[0051] In addition, those skilled in the art will understand that although some of the embodiments described herein include certain features contained in other embodiments but not others, the combinations of the features of different embodiments are equally within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by this application.

[0052] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content by using the above-mentioned hints to form equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A turntable tail structure, characterized in that: include: A lower base plate and a right side support plate structure and a left side support plate structure welded thereto; Two tail mounting plates for mounting the counterweight are welded to the tails of the right support plate structure and the left support plate structure, and the plates at the mutually welded joints are provided with grooves to increase the welding amount; a set cutting allowance is reserved above the tail mounting plate for machining to ensure the geometric tolerance of its installation; At least one connecting plate is welded together with the two tail mounting plates and the lower bottom plate.

2. The turntable tail structure according to claim 1, characterized in that: The right side support plate structure is formed by welding the right side vertical plate and the right side upper top plate, and the plates at the mutually welded joints are provided with grooves to increase the welding amount; The plates at the mutually welded connection between the right vertical plate and the lower bottom plate are provided with grooves to increase the welding amount.

3. The turntable tail structure according to claim 2, characterized in that: The front side elevation of the right tail mounting plate is welded to the right side elevation plate, and the plates at the mutually welded joints are provided with grooves to increase the welding amount; The top surface of the right tail mounting plate is provided with a step near its front side elevation, the right upper top plate extends backward to the step and is welded to the step, and the plates at the mutually welded joints are provided with grooves to increase the welding amount; The bottom surface of the right rear mounting plate is provided with a downwardly extending protrusion near the front side vertical surface thereof, and the protrusion is welded to the lower bottom plate.

4. The turntable tail structure according to claim 1, characterized in that: The left support plate structure is formed by welding the left vertical plate and the left upper top plate, and the plates at the mutually welded joints are provided with grooves to increase the welding amount; The plates at the mutually welded connection between the left vertical plate and the lower bottom plate are provided with grooves to increase the welding amount.

5. The turntable tail structure according to claim 4, characterized in that: The front side elevation of the left tail mounting plate is welded to the left vertical plate, and the plates at the mutually welded joints are provided with grooves to increase the welding amount; The top surface of the left tail mounting plate is provided with a step near its front side elevation, the left upper top plate extends rearward to the step and is welded to the step, and the plates at the mutually welded joints are provided with grooves to increase the welding amount; The bottom surface of the left tail mounting plate is provided with a downwardly extending protrusion near the front side vertical surface thereof, and the protrusion is welded to the lower bottom plate.

6. The turntable tail structure according to claim 1, characterized in that: The tail mounting plate is provided with a plurality of counterweight bolt through holes spaced apart in the vertical direction thereof, and the counterweight bolt through holes are machined after the welding of the turntable tail structure is completed.

7. The turntable tail structure according to claim 1, characterized in that: The tail mounting plate is provided with at least one lifting hole in the horizontal direction thereof, and the lifting hole is machined after the tail structure of the turntable is welded.

8. The turntable tail structure according to claim 1, characterized in that: The top surface of the connecting plate is configured as an inner concave arc surface with high ends and a low middle.

9. A turntable, characterized in that: The turntable tail structure comprises the turntable tail structure as described in any one of claims 1 to 8.

10. A mining excavator, characterized in that: Comprising the turntable as claimed in claim 9.

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