Locking device and engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a locking device and engineering machinery. The locking device comprises a locking screw rod and an adjusting assembly, the locking screw rod comprises a first supporting section and a second supporting section which are coaxially and sequentially arranged in the height direction, and the two ends, in the length direction, of the adjusting assembly are in threaded insertion connection with the first supporting section and the second supporting section correspondingly; and by increasing the number of the adjusting assemblies, the balance weight adjusting device can adapt to balance weights with different layers and large height changes, the types of the locking screws are reduced, and the universality is good. According to the balancing weight locking device, by arranging the adjusting assemblies, the adjusting assemblies can adjust the distance between the first supporting section and the second supporting section in the adjusting mode of rotating around the self axial direction, the locking device can meet balancing weights of different heights, and meanwhile the adjusting assemblies can be reduced, so that the locking effect is improved. The locking screw is prevented from protruding out of the top end face of the balancing weight by one section when the grading balancing weight is used, and normal operation of a machine is not affected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering machinery technical field, and concretely relates to a locking device and engineering machinery. BACKGROUND

[0002] In prior art, the counterweight mechanism on the rotating table of the crawler crane generally needs to realize the series connection of each layer of counterweight through the plug-in locking screw rod. With the development of the crawler crane and the change of market demand, the locking screw rod in prior art needs to be more flexible and variable when facing the installation of multiple counterweight blocks in layers, and needs to be disassembled or increased according to actual demand. The existing locking screw rod cannot adjust the height of the locking screw rod as a whole, and if a certain number of layers of counterweight blocks are removed, the top end of the locking screw rod is likely to be higher than the top end surface of the counterweight block, which will affect the slewing operation of the crawler crane. SUMMARY

[0003] The utility model aims at providing a locking device and engineering machinery, which can adjust the height of the locking screw rod and avoid affecting the normal operation of the machinery.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a locking device for locking the counterweight block, and the locking device comprises:

[0005] The locking screw rod comprises a first supporting section and a second supporting section arranged coaxially in sequence along the height direction.

[0006] The adjusting assembly is threadedly inserted into the first supporting section and the second supporting section at both ends along the length direction, and the adjusting assembly adjusts the distance between the first supporting section and the second supporting section through axial rotation to adapt to the counterweight blocks of different heights.

[0007] In the embodiment of the utility model, the locking screw rod further comprises a third supporting section arranged between the first supporting section and the second supporting section, and the adjusting assembly is threadedly inserted into the first supporting section and the third supporting section and the third supporting section and the second supporting section.

[0008] In the embodiment of the utility model, the number of the third supporting sections is multiple, and any two adjacent third supporting sections are threadedly connected through the adjusting assembly.

[0009] In the embodiment of the utility model, the adjusting assembly comprises a connecting head and two threaded rods, the two threaded rods are threadedly connected to both ends of the connecting head along the length direction, and the ends of the two threaded rods away from each other are threadedly inserted into the first supporting section or the second supporting section.

[0010] In the embodiment of the utility model, the connecting head is provided with a mounting groove for the threaded rod at both ends along the length direction, the two mounting grooves are arranged away from each other, and the groove walls are both formed with internal threads threadedly matched with the threaded rods.

[0011] In the embodiment of the utility model, the adjusting assembly further comprises a limiting bolt, a positioning through hole for inserting the limiting bolt is formed on the connecting head, and the positioning through hole extends through the connecting head between the bottom walls of the two mounting grooves and along the radial direction.

[0012] In the embodiment of the utility model, the adjusting assembly further comprises a plurality of locking members which are threadedly connected to the outer peripheral wall of the threaded rod, and the plurality of locking members are arranged along the length direction of the threaded rod and are spaced apart from each other, so as to limit and lock the threaded rod and the connecting head.

[0013] In the embodiment of the utility model, the locking screw rod, the connecting head and the threaded rod are all metal parts.

[0014] In the embodiment of the utility model, the locking device further comprises a positioning member for limiting and locking the counterweight block, and the positioning member is inserted into the end of the first supporting section away from the second supporting section along the radial direction.

[0015] In the embodiment of the utility model, an engineering machine is further provided, which comprises the locking device as described above.

[0016] Through the above technical solution, the locking device and the engineering machine provided by the embodiment of the utility model have the following beneficial effects:

[0017] The locking device in the application comprises a locking screw rod and an adjusting assembly, the locking screw rod comprises a first supporting section and a second supporting section which are coaxially arranged in sequence along the height direction, and the adjusting assembly is threadedly inserted into the first supporting section and the second supporting section at two ends along the length direction, so as to adapt to the counterweight with small single-layer height change, the number of the adjusting assembly and the supporting section is increased to adapt to the counterweight block with large height change of different layers, the types of the locking screw rod are reduced, and the utility model is good in versatility. In the embodiment, the adjusting assembly is provided, the adjusting assembly is adjusted by rotating around the axis, the distance between the first supporting section and the second supporting section is adjusted, the locking device of the application can adapt to the counterweight block with different heights, and the number of the adjusting assembly and the supporting section is reduced to avoid the locking screw rod protruding from the top end surface of the counterweight block by one section when the hierarchical counterweight is used, and the normal operation of the machine is affected.

[0018] Other features and advantages of the utility model embodiment will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain the principles of the application. Other embodiments of the application will be readily apparent to those of ordinary skill in the art from this disclosure, including realizing by one of ordinary skill in the art, other drawing structures illustrated in the drawings, without departing from the spirit of the application. In the drawings:

[0020] Figure 1 is a structural schematic view of the counterweight and the locking device according to an embodiment of the application;

[0021] Figure 2 is a structural schematic view of the counterweight and the locking device according to another embodiment of the application;

[0022] Figure 3 is a structural schematic view of the locking screw according to an embodiment of the application;

[0023] Figure 4 is a structural schematic view of the locking screw according to another embodiment of the application;

[0024] Figure 5 is a structural schematic view of the connecting head according to an embodiment of the application;

[0025] Figure 6 is a structural schematic view of the threaded rod according to an embodiment of the application.

[0026] Legend of reference signs

[0027] 11 first support section 212 positioning through hole

[0028] 12 second support section 22 threaded rod

[0029] 13 third support section 23 locking member

[0030] 2 adjustment assembly 3 positioning member

[0031] 21 connecting head 100 counterweight

[0032] 211 installation groove DETAILED DESCRIPTION

[0033] The specific embodiments of the application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the application, and are not intended to limit the application.

[0034] The locking device and the engineering machinery according to the application are described below with reference to the accompanying drawings.

[0035] As Figure 2 andFigure 3 As shown, in this embodiment, a locking device is proposed for locking the counterweight 100. The locking device includes a locking screw and an adjusting component 2. The locking screw includes a first support section 11 and a second support section 12 arranged coaxially along the height direction. The two ends of the adjusting component 2 along the length direction are respectively threaded into the first support section 11 and the second support section 12. The adjusting component 2 can adjust the distance between the first support section 11 and the second support section 12 by rotating its own axis, so as to adapt to the counterweight with small single-layer height variation. By increasing the number of adjusting components and support sections, it can adapt to counterweights 100 with large height variations in different layers, reducing the types of locking screws. In this embodiment, the locking screw has a better versatility. In this embodiment, an adjustment component 2 is provided. This component 2, by rotating around its own axis, can adjust the distance between the first support section 11 and the second support section 12. This allows the locking device of this application to accommodate counterweights 100 of different heights. Simultaneously, by reducing the number of adjustment components and support sections, it prevents the locking screw from protruding from the top surface of the counterweight 100 when using graded counterweights, thus avoiding interference with the normal operation of the machinery. It should be noted that the height direction refers to... Figure 3 In the vertical direction, the first support segment 11 is located above the second support segment 12. It should be noted that graded counterweight refers to increasing or decreasing the number of layers of counterweight blocks 100.

[0036] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the locking screw further includes a third support section 13 arranged between the first support section 11 and the second support section 12. Adjustment components 2 are threadedly connected between the first support section 11 and the third support section 13, and between the third support section 13 and the second support section 12. This embodiment, by adding a third support section 13 between the first support section 11 and the second support section 12, can further increase the overall height of the locking screw, facilitating the matching of counterweights with more stacked layers and higher overall height, thus solving the problem of too many locking screw models due to different counterweight heights in the prior art. Furthermore, since multiple support sections are threadedly connected via adjustment components 2, the parts have good versatility.

[0037] For example, the counterweight on a crawler crane is usually composed of multiple layers of counterweight blocks stacked together. Figure 1Three layers of counterweights 100 are arranged in the middle. In order to better match the height of the counterweight and realize the locking of the counterweight 100, the locking screw needs to be provided with three parts of the first supporting section 11, the second supporting section 12 and the third supporting section 13, and the height of the locking screw as a whole is adjusted by adjusting the adjusting assembly 2 between the first supporting section 11 and the third supporting section 13 and the third supporting section 13 and the second supporting section 12, so as to better match the height of the counterweight and ensure that the locking device has a good locking effect on the counterweight 100. If one layer of counterweights 100 is removed on the basis of Figure 1 , as shown in Figure 2 , the third supporting section 13 on the locking screw can be removed, only the first supporting section 11 and the second supporting section 12 are left, and the distance between the first supporting section 11 and the second supporting section 12 is adjusted by rotating the adjusting assembly 2 around its own axis, so as to better match the height of the counterweight 100 and realize the locking of the counterweight 100. The lengths of the three parts of the first supporting section 11, the second supporting section 12 and the third supporting section 13 can be adjusted according to actual needs.

[0038] In this embodiment, the number of third supporting sections 13 is multiple, and any two adjacent third supporting sections 13 are connected by the adjusting assembly 2 in a threaded manner, which is convenient for disassembly or assembly. The number of third supporting sections 13 can be adjusted according to actual needs, and the length of the locking screw can be greatly adjusted by adjusting the number of third supporting sections 13 in the locking screw, so as to adapt to the working condition of the counterweight with larger height span.

[0039] As shown in Figure 4 , in this embodiment, the adjusting assembly 2 includes a connecting head 21 and two threaded rods 22. The outer circumferential wall of each threaded rod 22 is formed with external threads, and the two threaded rods 22 are respectively threadedly connected to the two ends of the length direction of the connecting head 21, and the ends away from each other of the two threaded rods 22 are threadedly inserted into the first supporting section 11 or the second supporting section 12. Further, if the third supporting section 13 is arranged between the first supporting section 11 and the second supporting section 12, the adjusting assembly 2 still maintains this structure, and the distance between the third supporting section 13 and the first supporting section 11 or the second supporting section 12 can be efficiently adjusted, so as to better adapt to the counterweight with different heights.

[0040] As shown in Figure 5 and Figure 6As shown in the drawings, in the embodiment, the connecting head 21 is provided with two installation grooves 211 at both ends in the length direction, the two installation grooves 211 are oppositely arranged, and the groove walls of the two installation grooves 211 are provided with internal threads for threadedly connecting with the threaded rod 22. Preferably, the internal threads in the groove walls of the two installation grooves 211 are oppositely arranged, which facilitates the threadedly connecting between the connecting head 21 and the threaded rod 22, and the connecting head 21 and the threaded rod 22 can be quickly assembled or disassembled by clockwise rotation or counterclockwise rotation around the axis.

[0041] As shown in the drawings, Figure 3 In the embodiment, the adjusting assembly 2 further comprises a limiting pin, the connecting head 21 is provided with a positioning through hole 212 for inserting the limiting pin, and the positioning through hole 212 is located between the bottom walls of the two installation grooves 211 and extends through the connecting head 21 in the radial direction. In the embodiment, the limiting pin is inserted into the positioning through hole 212, which limits the axial rotation of the connecting head 21 and avoids the rotation loosening of the connecting head 21.

[0042] In the embodiment, the adjusting assembly 2 further comprises a plurality of locking members 23 which are threadedly connected to the outer peripheral wall of the threaded rod 22, and the plurality of locking members 23 are arranged at intervals along the length direction of the threaded rod 22 to limit and lock the threaded rod 22 and the connecting head 21. As shown in the drawings, Figure 3 In the embodiment, two locking members 23 are arranged on each threaded rod 22, which has better locking stability and can further lock the threaded rod 22 and the first support section 11, the second support section 12 and the third support section 13, thereby avoiding the axial rotation loosening of the first support section 11, the second support section 12 and the third support section 13. The number of the locking members 23 can be adjusted according to actual needs.

[0043] In the embodiment, the locking screw, the connecting head 21 and the threaded rod 22 are all made of metal materials. Preferably, the locking screw, the connecting head 21 and the threaded rod 22 are made of steel materials with high toughness and strength, so as to ensure that the overall structure of the locking device has high strength.

[0044] As shown in the drawings, Figure 3 and Figure 4 In the embodiment, the locking device further comprises a positioning member 3 for limiting and locking the weight blocks 100, the end of the first support section 11 away from the second support section 12 is provided with a positioning hole extending through the first support section 11 in the radial direction, and the positioning member 3 is inserted into the positioning hole in the radial direction to limit and lock the multiple layers of weight blocks 100 and avoid the up-and-down shaking of the multiple layers of weight blocks 100 in the height direction. The positioning member 3 can be a limiting bolt in the prior art.

[0045] In the present embodiment, an engineering machine is also proposed, comprising a locking device as described above. Since the engineering machine adopts all embodiments of the locking device, it also has all the beneficial effects brought by the locking device, which are not described in detail here.

[0046] In the description of the present application, it should be understood that the terms "first", "second" are for the purpose of description only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0047] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0049] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A locking device for locking a counterweight, characterized in that The locking device comprises: a locking screw rod comprising a first supporting section (11) and a second supporting section (12) arranged coaxially in sequence along a height direction; an adjusting assembly (2) threadedly inserted into the first supporting section (11) and the second supporting section (12) at two ends along a length direction, and the adjusting assembly (2) adjusts a distance between the first supporting section (11) and the second supporting section (12) by rotating axially to adapt to the counterweight (100) of different heights.

2. The locking device of claim 1, wherein, The locking screw rod further comprises a third supporting section (13) arranged between the first supporting section (11) and the second supporting section (12), and the first supporting section (11) and the third supporting section (13) and the third supporting section (13) and the second supporting section (12) are threadedly inserted with the adjusting assembly (2).

3. The locking device of claim 2, wherein, The number of the third supporting sections (13) is multiple, and any two adjacent third supporting sections (13) are threadedly connected by the adjusting assembly (2).

4. The locking device of claim 1, wherein, The adjusting assembly (2) comprises a connecting head (21) and two threaded rods (22), and the two threaded rods (22) are threadedly connected to two ends of the connecting head (21) along a length direction, and one end of the two threaded rods (22) away from each other is threadedly inserted into the first supporting section (11) or the second supporting section (12).

5. The locking device of claim 4, wherein, The connecting head (21) is provided with a mounting groove (211) for inserting the threaded rod (22) at two ends along a length direction, and the two mounting grooves (211) are arranged away from each other, and the groove wall is formed with an internal thread threadedly matched with the threaded rod (22).

6. The locking device of claim 5, wherein, The adjusting assembly (2) further comprises a limiting bolt, and the connecting head (21) is provided with a positioning through hole (212) for inserting the limiting bolt, and the positioning through hole (212) is located between the bottom walls of the two mounting grooves (211) and extends through the connecting head (21) along a radial direction.

7. The locking device of claim 4, wherein, The adjusting assembly (2) further comprises a plurality of locking pieces (23) threadedly connected to the outer peripheral wall of the threaded rod (22), and the plurality of locking pieces (23) are arranged at intervals along the length direction of the threaded rod (22) to limit and lock the threaded rod (22) and the connecting head (21).

8. The locking device of claim 4, wherein, The locking screw rod, the connecting head (21) and the threaded rod (22) are all made of metal materials.

9. The locking device according to any one of claims 1 to 8, characterized in that The locking device further comprises a positioning piece (3) for limiting and locking the counterweight (100), and the positioning piece (3) is inserted into the end of the first supporting section (11) away from the second supporting section (12) along a radial direction.

10. A working machine, characterized in that The locking device comprises: The locking device comprises:

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