Connection compensation device and engineering machinery

Abstract

The utility model relates to the field of engineering machinery, and discloses a connection compensation device and engineering machine.The connection compensation device is used for connecting a first component and a second component, the first component penetrates through the second component, the connection compensation device comprises an inner sleeve and an elastic compensation sealing ring, and the inner sleeve is arranged on the first component in a sleeving mode and is in clearance fit with the first component; the periphery of the inner sleeve is in interference press fit with the first end of the second component; the elastic compensation sealing ring is arranged on the periphery of the inner sleeve in a sleeving mode and used for compensating the relative displacement amount between the first component and the second component. The first component and the second component are connected through the connection compensation device, and the elastic compensation sealing ring in the connection compensation device has a certain deformation buffering capacity, so that the assembly error and the relative displacement between the first component and the second component can be compensated to a certain extent, and the strength and the working condition adaptability of the structural component are improved.

Description

Technical Field

[0001] This application belongs to the technical field of construction machinery, and particularly relates to a connection compensation device and a construction machinery. Background Art

[0002] As one of the most widely used machine types in earthwork and rockwork operations, bulldozers are often used for various operations such as long-distance pushing of accumulated soil, filling, loosening, traction, subgrade construction, surface stripping, and garbage cleaning. As the core structural module of a bulldozer, the chassis assembly not only needs to ensure that the strength meets the design life requirements but also has to consider the actual motion states under various complex working conditions. Therefore, the frame assembly, traveling device, and suspension system on the chassis all adopt hard-size assembly. However, this hard-size assembly method leaves no adjustment margin between components, requires high dimensional accuracy of structural parts, and is prone to assembly errors during assembly. Summary of the Utility Model

[0003] The purpose of this application is to provide a connection compensation device and a construction machinery to compensate for the assembly errors and relative displacements between structural parts to a certain extent.

[0004] To achieve the above purpose, on the one hand, this application provides a connection compensation device for connecting a first component and a second component, with the first component passing through the second component. The connection compensation device includes:

[0005] An inner sleeve, sleeved on the first component and having a clearance fit with the first component, and the outer circumference of the inner sleeve is press-fitted with an interference fit to the first end of the second component;

[0006] An elastic compensation sealing ring, sleeved on the outer circumference of the inner sleeve and used to compensate for the relative displacement amount between the first component and the second component.

[0007] In some embodiments, the connection compensation device further includes a connection disk. The connection disk is installed on the first component, and a flange is formed at the outer end of the connection disk. The elastic compensation sealing ring is embedded between the outer peripheral wall of the inner sleeve and the flange, and the inner peripheral wall and the outer peripheral wall of the elastic compensation sealing ring are respectively in interference fit with the outer peripheral wall of the inner sleeve and the flange.

[0008] In some embodiments, a receiving cavity is formed in the inner peripheral wall at the end of the second component, and the elastic compensation sealing ring is located in the receiving cavity. The inner peripheral wall and the outer peripheral wall of the elastic compensation sealing ring are respectively in interference fit with the outer peripheral wall of the inner sleeve and the inner peripheral wall of the receiving cavity.

[0009] In some embodiments, the elastic compensation seal ring includes an inner ring, a middle ring, and an outer ring that are sequentially connected from the inside to the outside in the radial direction. The middle ring is made of a flexible material, the outer ring is made of a metal material, and the inner ring is made of a metal material or a plastic material.

[0010] In some embodiments, the connection compensation device includes a seal guard disposed on the flange. The seal guard covers the space formed between the flange and the second member.

[0011] In some embodiments, the connection compensation device further includes an outer sleeve disposed on the first member. The outer sleeve is in clearance fit with the first member, and the outer peripheral wall of the outer sleeve is press-fitted with an interference fit to the second end of the second member.

[0012] In some embodiments, the inner peripheral wall of the second member near the second end has a rabbet portion. The connection compensation device further includes a spacer ring installed in the rabbet portion. The spacer ring is sleeved on the first member, and there is a clearance fit between the spacer ring and both the first member and the second member.

[0013] In some embodiments, the connection compensation device further includes a pressure plate detachably connected to the axial two ends of the first member. There is a clearance fit between the outer periphery of the pressure plate and the inner peripheral wall of the second member.

[0014] In some embodiments, the connection compensation device further includes a gland installed on the side of the pressure plate facing away from the first member. A seal is provided between the outer peripheral wall of the gland and the inner peripheral wall of the second member.

[0015] The second aspect of the present application provides a construction machine, which includes the connection compensation device as described above.

[0016] Through the above technical solution, the inner sleeve is sleeved on the first member and is in clearance fit with the first member. The outer periphery of the inner sleeve is press-fitted with an interference fit to the first end of the second member. The elastic compensation seal ring is sleeved on the outer periphery of the inner sleeve and is used to compensate for the relative displacement amount between the first member and the second member. The elastic compensation seal ring is in interference fit with both the outer peripheral wall of the inner sleeve and other components. By providing an elastic compensation seal ring on the inner sleeve of the first member in the present application, since the elastic compensation seal ring has a certain amount of deformation buffer, it can compensate for the assembly error and relative displacement amount between the first member and the second member to a certain extent, improving the strength and working condition adaptability of the structural member.

[0017] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific embodiment part. Description of the Drawings

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts. In the drawings:

[0019] Figure 1 It is a schematic structural diagram of the connection state of the connection compensation device of the present application in the first embodiment;

[0020] Figure 2 It is a schematic structural diagram of the connection state of the connection compensation device of the present application in the second embodiment;

[0021] Figure 3 It is a partial sectional view of the connection state of the connection compensation device of the present application in the second embodiment;

[0022] Figure 4 It is a schematic structural diagram of the elastic compensation sealing ring in the connection compensation device of the present application;

[0023] Figure 5 It is a sectional view of the elastic compensation sealing ring in the connection compensation device of the present application.

[0024] Description of reference numerals

[0025] 100 pivot 32 intermediate ring

[0026] 200 pivot box 33 outer ring

[0027] 300 bogie frame 40 sealing shield

[0028] 400 guide wheel push rod 50 outer sleeve

[0029] 10 connecting plate 60 spacer ring

[0030] 11 flanging 70 pressure plate

[0031] 20 inner sleeve 80 gland

[0032] 30 elastic compensation sealing ring 90 seal

[0033] 31 inner ring 500 snap ring Specific embodiments

[0034] The following is a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present application, and are not used to limit the present application.

[0035] The connection compensation device and construction machinery according to the present application will be described below with reference to the accompanying drawings.

[0036] As Figure 1 and Figure 2 shown, the present application provides a connection compensation device for connecting a first member and a second member, the first member passing through the second member, and the connection compensation device includes an inner sleeve 20 and an elastic compensation seal ring 30; the inner sleeve 20 is sleeved on the first member and is in clearance fit with the first member, and the outer periphery of the inner sleeve 20 is press-fitted with an interference fit to the first end of the second member; sleeved on the outer periphery of the inner sleeve 20 and used to compensate for the relative displacement between the first member and the second member, the elastic compensation seal ring 30 is in interference fit with both the outer peripheral wall of the inner sleeve 20 and other components.

[0037] In the present application, by providing the elastic compensation seal ring 30 on the inner sleeve 20 of the first member, since the elastic compensation seal ring 30 has a certain amount of deformation buffer, it can compensate for the assembly error and relative displacement between the first member and the second member to a certain extent, improving the strength and working condition adaptability of the structural member.

[0038] As Figure 4 and Figure 5 shown, the elastic compensation seal ring 30 includes an inner ring 31, a middle ring 32, and an outer ring 33 connected in sequence from the inside to the outside in the radial direction, and the middle ring 32 is made of a flexible material. Preferably, the middle ring 32 can be made of rubber material, and in order to increase the buffering elastic effect of the middle ring 32, the outer peripheral wall of the middle ring 32 is set as an arc-shaped concave peripheral wall. When using the elastic compensation seal ring 30 of the present application for displacement compensation, since the middle ring 32 is made of a flexible material, when the first member and the second member are assembled, the middle ring 32 can have a large amount of deformation, so as to compensate for the assembly error and relative displacement between the first member and the second member to a certain extent. In addition, since the middle ring 32 is located between the inner ring 31 and the outer ring 33, the middle ring 32 does not directly contact and wear with the first member or the second member, improving the service life of the middle ring 32 and reducing the market service difficulty and cost.

[0039] There are two ways to set the elastic compensation seal ring 30. One is to satisfy the relatively small relative displacement compensation between the first member and the second member, and the other is to satisfy the relatively large relative movement compensation between the first member and the second member.

[0040] In the first embodiment of the present application, the connection compensation device further includes a connection plate 10. The connection plate 10 is installed on the first member and a flange 11 is formed at the outer end of the connection plate 10. The elastic compensation seal ring 30 is embedded between the outer peripheral wall of the inner sleeve 20 and the flange 11, and the inner peripheral wall and the outer peripheral wall of the elastic compensation seal ring 30 are in interference fit with the outer peripheral wall of the inner sleeve 20 and the flange 11 respectively. In this embodiment, as Figure 1As shown, the first component is a combined structure of a pivot 100 and a frame assembly, and the second component is a pivot box 200 which is part of the structure of the traveling device.

[0041] Among them, the outer ring 33 is a metal ring, the inner ring 31 is also a metal ring, and the middle ring 32 is made of rubber. This combination method is mainly applied to the assembly process of the traveling device and the frame assembly of a bulldozer. In this embodiment, the first component is a combined structure of a pivot 100 and a frame assembly, and the second component is a pivot box 200. The pivot 100 passes through the frame assembly and plays a supporting role, and the pivot 100 is axially inserted into the pivot box 200. The connecting plate 10 is sleeved on the pivot 100 and the end of one side in the circumferential direction is fixedly installed with the frame assembly through bolts. Since the lateral assembly dimension of the traveling device and the frame assembly mainly depends on the length of the pivot 100, during the daily operation of the bulldozer, there is a very small relative movement between the connecting plate 10 and the inner sleeve 20. The combined sealing form of the bimetallic ring and rubber vulcanization can compensate for the assembly error dimension and solve the sealing problem between relatively moving parts.

[0042] In addition, the traveling device of this embodiment is connected to the rear end of the frame assembly through an integral pivot 100, and the front end is hinged to the balance beam of the suspension system. This structural form improves the connection stiffness between the two. At the same time, since the traveling device can rotate around the pivot by a certain angle, when encountering uneven road surfaces, the traveling device can make small swings, improving the passing ability of the bulldozer.

[0043] In some embodiments, a press-fitting surface is formed on the outer peripheral wall of one end of the inner sleeve 20 close to the second component, and the press-fitting surface is in sealing fit with the inner peripheral wall of the first end of the second component, so as to achieve a better press-fitting effect and sealing effect between the inner sleeve 20 and the second component.

[0044] In some embodiments, the connection compensation device includes a sealing cover 40 provided on the flange 11, and the sealing cover 40 covers the space formed between the flange 11 and the second component. One end of the sealing cover 40 is connected to the pivot box 200, and the other end is detachably connected to the flange 11 through bolts, so as to close the space formed therebetween, and seal the elastic compensation sealing ring 30 in this space, effectively ensuring the dust-proof effect.

[0045] In some embodiments, the connection compensation device further includes an outer sleeve 50 provided on the first component. The outer sleeve 50 is in clearance fit with the first component, and the outer peripheral wall of the outer sleeve 50 is in interference press-fitting with the second end of the second component. The outer sleeve 50 and the inner sleeve 20 are respectively arranged at both ends close to the pivot box 200. Since the outer sleeve 50 is press-fitted with the second end of the second component, the inner sleeve 20 and the outer sleeve 50 cooperate to improve the connection stability and sealing effect between the pivot 100 and the pivot box 200.

[0046] In some embodiments, the connection compensation device further comprises a pressure plate 70 detachably connected to both axial ends of the first member, and a clearance fit is formed between the outer periphery of the pressure plate 70 and the inner peripheral wall of the second member. When connected, the pressure plate 70 and the pivot 100 are fixed by bolts to prevent the walking device from moving left and right.

[0047] In some embodiments, the inner peripheral wall of the second member near the second end has a stop portion, and the connection compensation device also includes a spacer ring 60 installed on the stop portion, the spacer ring 60 is sleeved on the first member, and the spacer ring 60 and the first member and the second member are all clearance-matched. In the first embodiment, when the trolley frame 300 encounters bumpy road conditions while traveling, the trolley frame 300 will rotate along the pivot 100 at a particularly small angle. The spacer ring 60 between the pivot 100 and the pivot box can wear against the pressure plate 70, which can effectively protect the pivot box 200.

[0048] In some embodiments, the connection compensation device further includes a gland 80 installed on the side of the pressure plate 70 away from the first member, and a seal 90 is provided between the outer peripheral wall of the gland 80 and the inner peripheral wall of the second member. The seal 90 is an O-ring, and since there is a large amount of engine oil in the pivot box 200, both sides need to be well sealed, and the presence of the O-ring can play the role of piston sealing.

[0049] In the second embodiment of the present application, a receiving cavity is formed on the inner circumferential wall of the end of the second component, and the elastic compensation sealing ring 30 is located in the receiving cavity. The inner circumferential wall and the outer circumferential wall of the elastic compensation sealing ring 30 are respectively interference fit with the outer circumferential wall of the inner sleeve 20 and the inner circumferential wall of the receiving cavity, that is, the elastic compensation sealing ring 30 is directly embedded between the inner sleeve 20 and the second component.

[0050] In the second embodiment, the outer ring 33 is a metal ring, the inner ring 31 is a plastic ring, preferably, the inner ring 31 can be made of polytetrafluoroethylene or MC nylon, and the middle ring 32 is made of rubber. This combination can achieve the sealing problem between two components with large relative motion displacement. Specifically, in this embodiment, the first component is the guide wheel push rod 400, the second component is the trolley frame 300, and the inner sleeve 20 is a chrome-plated sleeve. Figure 2 and Figure 3As shown, under normal operating conditions of the traveling device of this solution, there is a large displacement in the axial direction between the bogie frame 300 and the idler push rod 400. The outer ring 33 made of metal is press-fitted with the bogie frame 300, and the inner ring 31 of the plastic ring is in an over-interference fit with the chrome-plated sleeve to achieve the sealing function. The plastic inner ring 31 of the elastic compensation seal ring 30 can slide relative to the chrome-plated sleeve, realizing the relative movement between the bogie frame 300 and the idler push rod 400 and the function of cleaning the chrome-plated sleeve. In addition, the deformation of the rubber in the middle ring 32 can compensate for the small deflections in all directions when the idler push rod 400 is working. And, in this embodiment, by using a plastic material for the inner ring 31, dirt and oil on the inner surface of the frame can be cleaned when the bogie frame 300 and the idler push rod 400 move relative to each other, preventing the contamination of the engine oil in the frame cavity.

[0051] In addition, in this embodiment, a snap ring 500 is further provided at the axial end of the elastic compensation seal ring 30 to limit the axial movement of the elastic compensation seal ring 30.

[0052] The second aspect of this application provides a construction machine, and the construction machine includes the connection compensation device as above. Among them, the construction machine can be a bulldozer. By applying this connection compensation device to the chassis structure of the bulldozer, relative displacement and assembly error compensation between multiple components on the traveling device can be achieved through the connection compensation device of this application.

[0053] In the description of this application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0054] In this application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0056] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A connection compensation device for connecting a first component and a second component, wherein the first component penetrates through the second component, and is characterized in that The connection compensation device comprises: An inner sleeve (20) is sleeved on the first component and is clearance-matched with the first component, and the outer periphery of the inner sleeve (20) is interference-fitted with the first end of the second component; An elastic compensation sealing ring (30) is sleeved on the outer periphery of the inner sleeve (20) and is used to compensate for the relative displacement between the first component and the second component.

2. The connection compensation device according to claim 1, wherein The connection compensation device also includes a connection disk (10), the connection disk (10) is mounted on the first component and the outer end of the connection disk (10) is formed with a flange (11), the elastic compensation sealing ring (30) is embedded between the outer peripheral wall of the inner sleeve (20) and the flange (11), and the inner peripheral wall and the outer peripheral wall of the elastic compensation sealing ring (30) are respectively interference-fitted with the outer peripheral wall of the inner sleeve (20) and the flange (11).

3. The connection compensation device according to claim 1, characterized in that, The inner peripheral wall of the end of the second component forms a receiving cavity, the elastic compensation sealing ring (30) is located in the receiving cavity, and the inner peripheral wall and outer peripheral wall of the elastic compensation sealing ring (30) are respectively interference-fitted with the outer peripheral wall of the inner sleeve (20) and the inner peripheral wall of the receiving cavity.

4. The connection compensation device according to claim 1, characterized in that The elastic compensation sealing ring (30) comprises an inner ring (31), a middle ring (32) and an outer ring (33) which are connected in sequence from the inside to the outside in the radial direction, the middle ring (32) is a flexible material, the outer ring (33) is a metal material, and the inner ring (31) is a metal material or a plastic material.

5. The connection compensation device according to claim 2, characterized in that, The connection compensation device comprises a sealing shield (40) arranged on the flange (11), and the sealing shield (40) covers the space formed between the flange (11) and the second component.

6. The connection compensation device according to claim 2, characterized in that, The connection compensation device also includes a sleeve (50) provided on the first component, the sleeve (50) and the first component are clearance-fitted, and the outer peripheral wall of the sleeve (50) is interference-fitted with the second end of the second component.

7. The connection compensation device according to claim 2, wherein The inner peripheral wall of the second component close to the second end has a stop portion, and the connection compensation device also includes a spacer ring (60) installed on the stop portion, and the spacer ring (60) is sleeved on the first component, and the spacer ring (60) is loosely matched with the first component and the second component.

8. The connection compensation device according to claim 2, characterized in that, The connection compensation device also includes a pressure plate (70) detachably connected to the two axial ends of the first component, and a clearance fit is formed between the outer periphery of the pressure plate (70) and the inner peripheral wall of the second component.

9. The connection compensation device according to claim 8, wherein, The connection compensation device also includes a pressure cover (80) installed on the side of the pressure plate (70) facing away from the first component, and a sealing member (90) is provided between the outer peripheral wall of the pressure cover (80) and the inner peripheral wall of the second component.

10. An engineering machinery, characterized in that, The construction machine comprises a connection compensation device according to any one of claims 1 to 9.

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