Central swivel mechanism and engineering machine

Abstract

The application relates to the technical field of engineering machinery, and discloses a center rotating mechanism and engineering machinery. The center rotating mechanism comprises an electric slip ring and a rotating assembly. The rotating assembly comprises an inner sleeve and an outer sleeve which are coaxially and sequentially embedded. The electric slip ring is coaxially sleeved on the inner wall surface of the inner sleeve and is limitedly connected with the inner sleeve. A plurality of hydraulic flow channels for hydraulic oil flow exist between the outer sleeve and the inner sleeve. The inner sleeve and the electric slip ring can rotate relative to the outer sleeve. The center rotating mechanism in the embodiment comprises the coaxially and sequentially embedded inner sleeve and outer sleeve, and the electric slip ring is coaxially sleeved on the inner wall surface of the inner sleeve, so that the height of the center rotating mechanism is effectively reduced, the problem of the excessively high overall height of the center rotating mechanism in the prior art is solved, the center rotating mechanism in the application has a compact structure and high space utilization rate, and can be applied to various engineering machinery.

Description

Technical Field

[0001] This application belongs to the field of engineering machinery technology, specifically relating to a center slewing mechanism and engineering machinery. Background Technology

[0002] The center slewing mechanism is a key component in the hydraulic system of construction machinery. It primarily connects the hydraulic oil channels between stationary and rotating parts, and its core function is to allow continuous, leak-free hydraulic oil transfer during equipment rotation while maintaining the independent sealing of multiple oil circuits. However, in domestic large-span fire trucks, limitations exist in the horizontal space between the water pipes of the turntable and the boom cylinder hinge point, as well as in the vertical space of the turntable itself. This insufficient assembly space prevents the use of conventional center slewing mechanisms. Therefore, existing center slewing mechanisms suffer from excessive overall height, limiting their application scenarios. Utility Model Content

[0003] The purpose of this application is to provide a center slewing mechanism and engineering machinery to solve the problem of excessive height in existing center slewing mechanisms.

[0004] To achieve the above objectives, this application provides a center turning mechanism, which includes: Electric slip rings; The slewing assembly includes an inner sleeve and an outer sleeve that are coaxially nested from the inside to the outside. An electric slip ring is coaxially sleeved on the inner wall of the inner sleeve and is locked in place with the inner sleeve. There are multiple hydraulic channels between the outer sleeve and the inner sleeve for hydraulic oil to flow. The inner sleeve and the electric slip ring can rotate relative to the outer sleeve.

[0005] In an embodiment of this utility model, the rotary assembly further includes a connecting plate. A limiting groove is provided at the first axial end of the inner sleeve. One end of the connecting plate is detachably connected to the electric slip ring, and the other end extends into the limiting groove and is fitted and engaged with the limiting groove.

[0006] In an embodiment of this utility model, the central rotary mechanism further includes a mounting plate and a cover plate. The cover plate is an annular structure that covers the end face of the second axial end of the rotary assembly. The cover plate has a receiving groove extending circumferentially. The opening of the receiving groove faces the rotary assembly. The mounting plate is embedded in the receiving groove. The second axial end face of the inner sleeve has an annular protrusion. The mounting plate has a snap-fit ​​groove that engages with the annular protrusion.

[0007] In an embodiment of this utility model, the end face of the outer sleeve has a blocking step surface, and the outer periphery of the mounting plate extends out from the receiving groove and abuts against the blocking step surface.

[0008] In an embodiment of this utility model, the central rotary mechanism further includes a sealing element. Multiple storage grooves extending circumferentially are provided on the inner wall surface of the outer sleeve. The number of sealing elements is multiple and they are arranged in the storage grooves in a one-to-one correspondence. A storage groove is provided between any two adjacent hydraulic flow channels.

[0009] In an embodiment of this utility model, corresponding and interconnected oil grooves extending circumferentially are provided on the opposing walls of the outer sleeve and the inner sleeve. The two corresponding and interconnected oil grooves enclose each other to form a hydraulic flow channel for hydraulic oil to flow. Multiple first oil passages are provided on the side wall of the outer sleeve. Each first oil passage extends radially along the outer sleeve and is connected to the hydraulic flow channel.

[0010] In an embodiment of this utility model, the inner sleeve is further provided with a plurality of second oil passages. The first end oil port of the second oil passage is connected to the oil groove. The second end oil port of the second oil passage is located on the end face of the first axial end of the inner sleeve. The plurality of second end oil ports are arranged circumferentially along the end face of the inner sleeve.

[0011] In an embodiment of this utility model, the electric slip ring is provided with a plurality of wires extending along the axial direction, and the central rotation mechanism further includes a fork protrusion for engaging the wires, and the fork protrusions are multiple and symmetrically arranged on the cover plate.

[0012] In an embodiment of this utility model, the electric slip ring has a first wire outlet hole and a second wire outlet hole at both ends along the axial direction. The electric slip ring includes an outer slip ring and an inner slip ring nested inside the outer slip ring. The inner slip ring can rotate relative to the outer slip ring. The first wire outlet hole is located on the outer slip ring, and the second wire outlet hole is located on the inner slip ring. There are multiple first wire outlet holes, which are arranged circumferentially along the end face of the outer slip ring. There are multiple second wire outlet holes, which are arranged circumferentially along the end face of the inner slip ring.

[0013] In an embodiment of this utility model, an engineering machine is also proposed, including the central rotary mechanism as described above.

[0014] Through the above technical solutions, the central slewing mechanism and engineering machinery provided in the embodiments of this application have the following beneficial effects: This application proposes a central slewing mechanism, which includes an electric slip ring and a slewing assembly. The slewing assembly includes an inner sleeve and an outer sleeve coaxially nested from the inside out. The electric slip ring is coaxially fitted onto the inner wall of the inner sleeve and engages with it for limiting. Multiple hydraulic channels for hydraulic oil flow exist between the outer sleeve and the inner sleeve. The inner sleeve, along with the electric slip ring, can rotate relative to the outer sleeve. In this embodiment, the central slewing mechanism includes a coaxially nested inner sleeve and an outer sleeve. By coaxially fitting the electric slip ring onto the inner wall of the inner sleeve, the overall height of the central slewing mechanism is effectively reduced, solving the problem of excessive height in existing central slewing mechanisms. The central slewing mechanism of this application has a compact structure, high space utilization, and can be applied to various engineering machinery.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is an exploded view of the central rotating mechanism from one perspective, as described in this application. Figure 2 An exploded view of the central rotating mechanism from another perspective in this application; Figure 3 This is a schematic diagram of the outer sleeve structure according to this application; Figure 4 For the cross-sectional view of the cover plate according to this application; Figure 5 This is a cross-sectional view of the central rotary mechanism according to this application.

[0017] Explanation of reference numerals in the attached figures Detailed Implementation

[0018] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0019] The following description, with reference to the accompanying drawings, describes the center slewing mechanism and engineering machinery according to this application.

[0020] like Figure 1As shown, this application proposes a central rotary mechanism, which includes an electric slip ring 1 and a rotary assembly. The rotary assembly includes an inner sleeve 21 and an outer sleeve 22 that are coaxially nested from the inside to the outside. The electric slip ring 1 is coaxially sleeved on the inner wall surface of the inner sleeve 21 and is locked and engaged with the inner sleeve 21. There are multiple hydraulic channels for hydraulic oil to flow between the outer sleeve 22 and the inner sleeve 21. The inner sleeve 21 and the electric slip ring 1 can rotate relative to the outer sleeve 22.

[0021] The central slewing mechanism in this embodiment includes an inner sleeve 21 and an outer sleeve 22 that are coaxially nested. In this application, by coaxially sleeved the electric slip ring 1 on the inner wall of the inner sleeve 21, the overall height of the central slewing mechanism is effectively reduced, solving the problem of excessive overall height of the central slewing mechanism in the prior art. The central slewing mechanism in this application has a compact structure, high space utilization, and can be applied to a variety of engineering machinery.

[0022] like Figure 1 As shown, in this embodiment, the rotary assembly further includes a connecting plate 23. A limiting groove 211 is formed at the first axial end of the inner sleeve 21. One end of the connecting plate 23 is detachably connected to the electric slip ring 1, and the other end extends into the limiting groove 211 and is fitted and engaged with it. Specifically, in this application, two limiting grooves 211 are formed on the end face of the first axial end of the inner sleeve 21. Similarly, there are two connecting plates 23, each corresponding to one of the limiting grooves 211. The connecting plates 23 extend into the limiting grooves 211 to limit and engage the inner sleeve 21, preventing the inner sleeve 21 from slipping out of the outer sleeve 22 along the axial direction. In this application, by providing two connecting plates 23 on the electric slip ring 1, a stable limiting and engaging connection with the inner sleeve 21 can be achieved, preventing the inner sleeve 21 from moving relative to the outer sleeve 22 along the axial direction. Furthermore, the number of limiting grooves 211 opened on the inner sleeve 21 can be adjusted according to actual needs, as long as they can restrict the movement of the inner sleeve 21 relative to the outer sleeve 22 along the axial direction.

[0023] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the central rotary mechanism further includes a mounting plate 3 and a cover plate 4. The cover plate 4 is an annular structure that covers the end face of the second axial end of the rotary assembly and is detachably connected to the outer sleeve 22. The cover plate 4 has a receiving groove 41 extending circumferentially, with the opening of the receiving groove 41 facing the rotary assembly. The mounting plate 3 is embedded in the receiving groove 41 and is detachably connected to the inner sleeve 21, making disassembly and assembly convenient. The second axial end face of the inner sleeve 21 has an annular protrusion 212, and the mounting plate 3 has a snap-fit ​​groove that engages with the annular protrusion 212, facilitating quick positioning of the mounting plate 3 and the inner sleeve 21. The cover plate 4 effectively restricts the movement of the mounting plate 3, thereby preventing the inner sleeve 21 from slipping out of the outer sleeve 22 along the axial direction. like Figure 3 As shown, in this embodiment, the end face of the outer sleeve 22 has a blocking step surface 221. The outer periphery of the mounting plate 3 extends from the receiving groove 41 and abuts against the blocking step surface 221 to further restrict the movement of the inner sleeve 21 along the axial direction and prevent the inner sleeve 21 from slipping out of the outer sleeve 22 along the axial direction. The mounting plate 3 is also configured as a ring structure to ensure that when the inner sleeve 21 rotates relative to the outer sleeve 22, the mounting plate 3 can rotate along with the inner sleeve 21.

[0024] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the central rotary mechanism also includes a sealing element 5. Multiple storage slots 222 extending circumferentially are provided on the inner wall surface of the outer sleeve 22. The number of sealing elements 5 is multiple and they are arranged in the storage slots 222 in a one-to-one correspondence. A storage slot 222 is provided between any two adjacent hydraulic channels.

[0025] Specifically, such as Figure 5 As shown, this application features four hydraulic channels. To ensure the sealing effect of the hydraulic oil within these channels, five storage slots 222 are provided on the inner wall of the outer sleeve 22. A hydraulic channel is provided between any two adjacent storage slots 222. The sealing element 5 is placed within the storage slot 222 and can seal the gap between the inner sleeve 21 and the outer sleeve 22, preventing hydraulic oil leakage from the hydraulic channels. Furthermore, a retaining groove is also provided on the inner wall of the outer sleeve 22, with a dustproof ring 8 installed within it to prevent dust from contaminating the hydraulic oil. This application has two retaining grooves, which are positioned close to the storage slots 222 at the upper and lower ends, effectively blocking dust. The sealing element 5 can be efficiently sealed using existing sealing rings, and the number of storage slots 222 and retaining grooves can be adjusted according to actual needs.

[0026] like Figure 1 and Figure 2 As shown, in this embodiment, the outer sleeve 22 and the inner sleeve 21 are provided with corresponding and interconnected oil grooves 6 that extend circumferentially. The two corresponding and interconnected oil grooves 6 enclose each other to form a hydraulic flow channel for hydraulic oil to flow. The outer sleeve 22 is provided with a plurality of first oil passages 223 on its side wall. Each first oil passage 223 extends radially along the outer sleeve 22 and is connected to the hydraulic flow channel.

[0027] Specifically, the outer sleeve 22 of this application has six first oil passages 223 and four hydraulic flow channels. Two of the hydraulic flow channels are connected to one first oil passage 223, and the remaining two hydraulic flow channels are each connected to two first oil passages 223.

[0028] like Figure 5As shown, in this embodiment, the inner sleeve 21 is also provided with a plurality of second oil passages 213. The first end oil port of the second oil passage 213 is connected to the oil groove 6. The second end oil port of the second oil passage 213 is located on the end face of the first axial end of the inner sleeve 21. The plurality of second end oil ports are arranged circumferentially along the end face of the inner sleeve 21.

[0029] Specifically, the inner sleeve 21 has six second oil passages 213. A hydraulic flow channel connected to one first oil passage 223 is connected to one corresponding second oil passage 213, and a hydraulic flow channel connected to two first oil passages 223 is connected to two corresponding second oil passages 213. This ensures that sufficient hydraulic oil can flow from the first oil passage 223 to the second oil passage 213 through the hydraulic flow channel, thereby achieving efficient hydraulic oil transmission. The second oil passage 213 has an L-shaped structure, including a first conveying section extending radially along the inner sleeve 21, and a second conveying section connected to the first conveying section and extending along the axis of the inner sleeve 21, ensuring smooth hydraulic oil flow.

[0030] like Figure 2 and Figure 5 As shown, in this embodiment, the slip ring 1 is provided with multiple wires extending axially, and the central rotation mechanism also includes a fork protrusion 7 for engaging the wires. The fork protrusions 7 are multiple and symmetrically arranged on the cover plate 4. Specifically, this application provides two fork protrusions 7, which are integrally connected to the cover plate 4 and located on the inner peripheral wall of the annular cover plate 4. The two fork protrusions 7 are correspondingly arranged and both are used to engage the wires, thus preventing the wires on the slip ring 1 from becoming entangled due to the rotation of the slip ring 1 along with the inner sleeve 21.

[0031] like Figure 3 and Figure 5 As shown, in this embodiment, the electric slip ring 1 has a first wire outlet hole and a second wire outlet hole at both ends along the axial direction. The electric slip ring 1 includes an outer slip ring and an inner slip ring nested inside the outer slip ring. The inner slip ring can rotate relative to the outer slip ring. The first wire outlet hole is located on the outer slip ring, and the second wire outlet hole is located on the inner slip ring. There are multiple first wire outlet holes, which are arranged circumferentially along the end face of the outer slip ring. There are multiple second wire outlet holes, which are arranged circumferentially along the end face of the inner slip ring.

[0032] In this embodiment, an engineering machine is also proposed, including the central slewing mechanism as described above. Since the engineering machine employs all embodiments of the central slewing mechanism described in this application, it also possesses all the beneficial effects of the central slewing mechanism, which will not be elaborated upon here. Specifically, the central slewing mechanism described in this application can be used, for example, on a fire truck. Fire trucks are often equipped with a mounting fixture. By connecting the mounting fixture to the inner sleeve 21 and installing the outer sleeve 22 on the fire truck body, it can be ensured that the mounting fixture of the fire truck can smoothly perform slewing operations, that is, the inner sleeve 21 can smoothly rotate relative to the outer sleeve 22.

[0033] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A central rotary mechanism, characterized in that, The central rotary mechanism includes: Electric slip ring (1); The rotary assembly includes an inner sleeve (21) and an outer sleeve (22) arranged coaxially from the inside to the outside. The electric slip ring (1) is coaxially sleeved on the inner wall of the inner sleeve (21) and is locked and engaged with the inner sleeve (21). There are multiple hydraulic channels for hydraulic oil to flow between the outer sleeve (22) and the inner sleeve (21). The inner sleeve (21) together with the electric slip ring (1) can rotate relative to the outer sleeve (22).

2. The central rotary mechanism according to claim 1, characterized in that, The rotary assembly also includes a connecting plate (23), and a limiting groove (211) is provided at the first axial end of the inner sleeve (21). One end of the connecting plate (23) is detachably connected to the electric slip ring (1), and the other end extends into the limiting groove (211) and is adapted to and engaged with the limiting groove (211).

3. The central rotary mechanism according to claim 2, characterized in that, The central rotary mechanism also includes a mounting plate (3) and a cover plate (4). The cover plate (4) is an annular structure that covers the end face of the second axial end of the rotary assembly. The cover plate (4) has a receiving groove (41) extending circumferentially. The opening of the receiving groove (41) is set towards the rotary assembly. The mounting plate (3) is embedded in the receiving groove (41). The second axial end face of the inner sleeve (21) has an annular protrusion (212). The mounting plate (3) has a snap-fit ​​groove that engages with the annular protrusion (212).

4. The central rotary mechanism according to claim 3, characterized in that, The end face of the outer sleeve (22) has a blocking step surface (221), and the outer periphery of the mounting plate (3) extends out from the receiving groove (41) and abuts against the blocking step surface (221).

5. The central rotary mechanism according to claim 3, characterized in that, The central rotary mechanism also includes a seal (5). Multiple storage slots (222) extending circumferentially are provided on the inner wall of the outer sleeve (22). The number of seals (5) is multiple and they are arranged one-to-one in the storage slots (222). A storage slot (222) is provided between any two adjacent hydraulic channels.

6. The central rotary mechanism according to claim 4, characterized in that, The outer sleeve (22) and the inner sleeve (21) are provided with corresponding and interconnected oil grooves (6) extending in the circumferential direction. The two corresponding and interconnected oil grooves (6) enclose each other to form a hydraulic flow channel for hydraulic oil to flow. The outer sleeve (22) is provided with a plurality of first oil passages (223) on its side wall. Each first oil passage (223) extends radially along the outer sleeve (22) and is connected to the hydraulic flow channel.

7. The central rotary mechanism according to claim 6, characterized in that, The inner sleeve (21) is also provided with a plurality of second oil passages (213). The first end oil port of the second oil passage (213) is connected to the oil groove (6). The second end oil port of the second oil passage (213) is located on the end face of the first axial end of the inner sleeve (21). The plurality of second end oil ports are arranged circumferentially along the end face of the inner sleeve (21).

8. The central rotary mechanism according to claim 3, characterized in that, The slip ring (1) is provided with a plurality of wires extending along the axial direction. The central rotary mechanism also includes a fork protrusion (7) for engaging the wires. The fork protrusions (7) are multiple and symmetrically arranged on the cover plate (4).

9. The central rotary mechanism according to any one of claims 1 to 8, characterized in that, The electric slip ring (1) has a first outlet hole and a second outlet hole at both ends along the axial direction. The electric slip ring (1) includes an outer slip ring and an inner slip ring nested inside the outer slip ring. The inner slip ring can rotate relative to the outer slip ring. The first outlet hole is located on the outer slip ring, and the second outlet hole is located on the inner slip ring. There are multiple first outlet holes, which are arranged circumferentially along the end face of the outer slip ring. There are multiple second outlet holes, which are arranged circumferentially along the end face of the inner slip ring.

10. An engineering machinery, characterized in that, Includes the central rotary mechanism according to any one of claims 1 to 9.

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