Pin shaft hinge structure and engineering machinery

Abstract

The utility model belongs to the technical field of engineering machinery, disclose a pin shaft hinged structure and engineering machinery, pin shaft hinged structure includes mounting seat, pin shaft, push rod and dustproof subassembly, pin shaft sets up on mounting seat, pin shaft is equipped with bearing, and the equipped end of push rod is equipped on bearing, and push rod is connected with pin shaft rotation through bearing, and dustproof subassembly is equipped on pin shaft and part extends into the equipped end of push rod, and dustproof subassembly, push rod, bearing and pin shaft form the lubricating space in common, the lubricating space is used for storing lubricating grease, engineering machinery includes above -mentioned pin shaft hinged structure, still includes car body, and mounting seat is fixed on car body. The pin shaft hinged structure provided by the utility model, simple structure, effectively promote dustproof performance and lubricating performance, prolong the life.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a pin hinge structure and engineering machinery. Background Technology

[0002] Mining trucks are essential equipment used in large mines and engineering operations, and their structural systems directly affect their performance and safety. Among these, the pin-hinged joint system is a key component of mining trucks, and its design and manufacturing quality are crucial to the overall operation of the equipment.

[0003] Traditional pin-and-sleeve hinge structures present several challenges in practical applications. For instance, while the existing hinged joint between the pin and bushing can withstand high loads, the wear rate of both the pin and bushing is significantly accelerated in harsh mining environments due to the corrosive effects of dust, moisture, and harmful gases, as well as vibration and impact. Furthermore, traditional lubrication systems often suffer from drawbacks such as dust entering the friction pair surface, disrupting the lubricating oil film, and easy grease loss, further exacerbating pin wear. To address these issues, the industry has been exploring new pin-and-sleeve hinge structure designs. For example, some designs attempt to incorporate polyurethane elastomers at the pin head to improve cushioning performance. However, these improvements still cannot completely solve the durability and lubrication problems in harsh environments. Therefore, developing a new pin-and-sleeve hinge structure system for mining trucks that can effectively extend pin service life and improve lubrication is of significant practical importance. Utility Model Content

[0004] The purpose of this invention is to provide a pin hinge structure that effectively improves lubrication and dustproof performance and extends service life.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A pin-hinged structure, comprising:

[0007] Mounting base;

[0008] A pin is provided on the mounting base;

[0009] A thrust rod, wherein a bearing is sleeved on the pin shaft, and the sleeved end of the thrust rod is sleeved on the bearing shaft, and the thrust rod is rotatably connected to the pin shaft through the bearing shaft;

[0010] A dustproof component is sleeved on the pin and partially extends into the sleeve end of the thrust rod. The dustproof component, the thrust rod, the bearing, and the pin together form a lubrication space for storing grease.

[0011] Preferably, the dustproof assembly includes a retaining ring and a dustproof ring. The retaining ring is sleeved on the pin, and the dustproof ring is sleeved on the retaining ring. The dustproof ring extends at least partially into and abuts against the sleeved end of the thrust rod. The retaining ring, the dustproof ring, the thrust rod, the bearing, and the pin together form the lubrication space.

[0012] Preferably, the inner peripheral wall of the dustproof ring is in close contact with the outer peripheral wall of the retaining ring, and both the inner peripheral wall of the dustproof ring and the outer peripheral wall of the retaining ring are inclined relative to the axis of the pin.

[0013] Preferably, the retaining ring and the pin are fitted with a clearance.

[0014] Preferably, the mounting base is provided with a hinge joint, the hinge joint has a hinge hole, a bushing is provided in the hinge hole, and the end of the pin is fixedly inserted into the hinge hole and passes through the bushing.

[0015] Preferably, two hinge joints are provided at intervals, and the two opposite ends of the pin are respectively connected to the hinge joints at corresponding ends. The ends of the bearing and the thrust rod are both located between the two hinge joints, and the dustproof component is provided between the two opposite ends of the bearing and the hinge joints at corresponding ends.

[0016] Preferably, the pin is fixed to the mounting base by a locking member, the hinge joint has a first hole and a second hole, the pin has a third hole, and the locking member passes through the first hole, the third hole and the second hole for fixed connection.

[0017] Preferably, the locking component includes a locking bolt, the second hole is a threaded hole, the locking bolt passes through the first hole, and the third hole is threadedly connected to the second hole.

[0018] Preferably, the hinge hole includes a first hole portion and a second hole portion arranged in a stepped shape, with a stepped end face connecting the first hole portion and the second hole portion. The first hole portion is located on the side facing the thrust rod, and the diameter of the first hole portion is smaller than the diameter of the second hole portion. The bushing is disposed in the second hole portion and abuts against the stepped end face. The inner diameter of the bushing is equal to the diameter of the first hole portion.

[0019] This utility model also provides an engineering machinery, which includes the above-mentioned pin hinge structure, effectively improving dustproof and lubrication performance and extending the overall service life of the engineering machinery.

[0020] An engineering machine includes the pin hinge structure described in any one of the above claims, and also includes a vehicle body, wherein the mounting seat is fixed to the vehicle body.

[0021] Beneficial effects:

[0022] The pin-shaft hinge structure provided by this utility model has a pin mounted on a mounting base, and the thrust rod is rotatably connected to the pin via a bearing. By incorporating a dustproof component, the dustproof component, the thrust rod, the bearing, and the pin together form a lubrication space. This lubrication space allows for proper storage of grease, thereby lubricating the bearing and pin, preventing grease exposure to the outside environment, greatly improving grease storage capacity and usage efficiency, and avoiding grease waste. Furthermore, the dustproof component seals the gaps between the pin, the mounting base, and the thrust rod, reducing the ingress of external dust and preventing it from entering the friction pair surfaces.

[0023] The engineering machinery provided by this utility model includes the above-mentioned pin hinge structure, which effectively improves lubrication and dust prevention performance and extends service life. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the pin hinge structure provided by this utility model;

[0025] Figure 2 This is a cross-sectional schematic diagram of the pin hinge structure provided by this utility model.

[0026] In the picture:

[0027] 1. Mounting base; 11. Hinge joint; 111. Hinge hole; 1111. First hole portion; 1112. Second hole portion; 1113. Stepped end face;

[0028] 2. Pin; 21. Bearing; 22. Bushing; 23. Locking element; 24. Third hole;

[0029] 3. Thrust rod;

[0030] 4. Dustproof components; 41. Retaining ring; 42. Dustproof ring. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] This embodiment provides a pin-hinged structure. (Refer to...) Figures 1 to 2 As shown, the pin-shaft hinge structure includes a mounting base 1, a pin 2, a thrust rod 3, and a dustproof assembly 4. The pin 2 is mounted on the mounting base 1. A bearing 21 is sleeved on the pin 2, and the sleeved end of the thrust rod 3 is sleeved on the bearing 21, allowing the thrust rod 3 to be rotatably connected to the pin 2 via the bearing 21. The dustproof assembly 4 is sleeved on the pin 2 and at least partially extends into the sleeved end of the thrust rod 3. The dustproof assembly 4, the thrust rod 3, the bearing 21, and the pin 2 together form a lubrication space for storing grease.

[0036] In this embodiment, by providing a dustproof component 4, the dustproof component 4, together with the thrust rod 3, bearing 21, and pin 2, forms a lubrication space. This lubrication space allows for proper storage of grease, thereby lubricating the bearing 21 and pin 2, preventing grease exposure to the outside environment, greatly improving grease storage capacity and usage efficiency, and avoiding grease waste. Furthermore, the dustproof component 4 seals the gaps between the pin 2, mounting base 1, and thrust rod 3, reducing the entry of external dust and preventing it from entering the friction pair surfaces.

[0037] In this embodiment, the dustproof assembly 4 includes a retaining ring 41 and a dustproof ring 42. The retaining ring 41 is sleeved on the pin 2, and the dustproof ring 42 is sleeved on the retaining ring 41. The dustproof ring 42 partially extends into and abuts against the sleeved end of the thrust rod 3. The retaining ring 41, the dustproof ring 42, the thrust rod 3, the bearing 21, and the pin 2 together form the lubrication space. Specifically, during assembly, the retaining ring 41 is first sleeved onto the pin 2, and then the dustproof ring 42 is sleeved onto the retaining ring 41. The inner peripheral wall of the dustproof ring 42 is in close contact with the outer peripheral wall of the retaining ring 41, thereby completing the installation of the dustproof assembly 4. Specifically, the dustproof ring 42 partially extends into the sleeved end of the thrust rod 3 and abuts against the sleeved end of the thrust rod 3. Furthermore, the combination of the retaining ring 41 and the dustproof ring 42 seals the gaps between the pin 2, the mounting base 1, and the thrust rod 3, reducing the entry of external dust and preventing external dust from entering the friction pair surface.

[0038] In this embodiment, the inner peripheral wall of the dustproof ring 42 is in close contact with the outer peripheral wall of the retaining ring 41, and both the inner peripheral wall of the dustproof ring 42 and the outer peripheral wall of the retaining ring 41 are inclined relative to the axis of the pin 2. This arrangement restricts the movement of the dustproof ring 42 relative to the retaining ring 41 along the axis of the pin 2, thereby achieving an axial limiting effect on the dustproof ring, ensuring the normal functioning of the dustproof ring 42, preventing accidental slippage of the dustproof ring 42 in harsh environments, and improving the operational stability of the equipment.

[0039] In some other alternative embodiments, the inner peripheral wall of the dustproof ring 42 and the outer peripheral wall of the retaining ring 41 can be configured as a matching stepped shape, or a limiting block can be directly set between the dustproof ring 42 and the retaining ring 41, which can also achieve the effect of axially limiting the dustproof ring.

[0040] In this embodiment, the retaining ring 41 is made of carbon steel, and the dust ring 42 is made of rubber. Specifically, the bushing 22 is made of high-quality carbon structural steel and is surface hardened, resulting in high surface hardness and excellent wear resistance. The dust ring 42 is made of corrosion-resistant and low-temperature resistant rubber.

[0041] In this embodiment, the retaining ring 41 and the pin 2 are fitted with a clearance fit. This arrangement facilitates the quick and reliable installation of the retaining ring 41 onto the pin 2, and also allows the grease in the lubrication space to flow into the gap between the retaining ring 41 and the pin 2, forming a lubricating oil film and ensuring reliable lubrication performance.

[0042] In this embodiment, the mounting base 1 is provided with a hinge joint 11, the hinge joint 11 having a hinge hole 111, and a bushing 22 being provided inside the hinge hole 111. The end of the pin 2 is fixedly inserted into the hinge hole 111 and passes through the bushing 22. Specifically, the hinge joint 11 of the mounting base 1 has a hinge hole 111, and a bushing 22 is provided between the pin 2 and the hinge hole 111. The bushing 22 effectively separates the pin 2 from the hinge hole 111, preventing the pin 2 from directly contacting the hinge hole 111. This effectively avoids wear on the support base, reduces maintenance costs, and significantly extends the service life of the equipment.

[0043] Furthermore, two hinge joints 11 are spaced apart, and the two opposite ends of the pin 2 are respectively connected to the corresponding hinge joints 11. The ends of the bearing 21 and the thrust rod 3 are both located between the two hinge joints 11, and dustproof components 4 are provided between the opposite ends of the bearing 21 and the corresponding hinge joints 11. Specifically, the opposite ends of the pin 2 are connected to the hinge joints 11, which effectively ensures the stability of the pin 2 installation. Dustproof components 4, namely retaining rings 41 and dustproof rings 42, are provided between the opposite ends of the bearing 21 and the corresponding hinge joints 11, so that the opposite ends of the bearing 21 can have a lubrication space for storing grease and can have reliable dustproof performance.

[0044] Specifically, the hinge hole 111 includes a first hole portion 1111 and a second hole portion 1112 arranged in a stepped manner. A stepped end face 1113 connects the first hole portion 1111 and the second hole portion 1112. The first hole portion 1111 is located on the side facing the thrust rod 3, and the diameter of the first hole portion 1111 is smaller than the diameter of the second hole portion 1112. The bushing 22 is disposed in the second hole portion 1112 and abuts against the stepped end face 1113. The inner diameter of the bushing 22 is equal to the diameter of the first hole portion 1111. Specifically, the first hole portion 1111, the second hole portion 1112, and the stepped end face 1113 can form an annular groove for embedding the bushing 22, so that the bushing 22 can be fixedly embedded in the annular groove. The stepped end face 1113 abuts against the bushing 22 to provide installation limit for the bushing 22. The inner diameter of the bushing 22 is equal to the diameter of the first hole 1111, ensuring that when the pin 2 is installed, the outer peripheral wall of the pin 2 can make effective contact with both the bushing 22 and the first hole 1111, thereby achieving reliable support for the pin 2.

[0045] Furthermore, the pin 2 is fixed to the mounting base 1 by a locking member 23. The hinge joint 11 has a first hole (not shown) and a second hole (not shown), and the pin 2 has a third hole 24. The locking member 23 passes through the first hole, the third hole 24, and is fixedly connected to the second hole. Specifically, by setting the locking member 23, the locking member 23 achieves a function similar to a latch, thereby fixing the pin 2 to the mounting base 1, preventing the pin 2 from moving relative to the mounting base 1 along its own axial direction, and achieving the release and drag setting of the pin 2.

[0046] Optionally, the locking component 23 includes a locking bolt, and the second hole is a threaded hole. The locking bolt passes through the first hole and the third hole 24 and is threadedly connected to the second hole. The operation is simple and the locking is reliable and stable.

[0047] In some other alternative embodiments, the locking member 23 may also include a locking nut (not shown), the second hole may not be a threaded hole, and the locking bolt passes through the first hole, the third hole 24, and the second hole and is threadedly connected to the locking nut.

[0048] This embodiment also provides a piece of construction machinery. The construction machinery includes the aforementioned pin-hinged structure and a vehicle body, with the mounting base 1 fixed to the vehicle body. The construction machinery, including the aforementioned pin-hinged structure, thus possesses all the beneficial effects of the aforementioned pin-hinged structure, namely, effectively increasing the storage capacity and utilization efficiency of lubricating grease, avoiding grease waste, reducing the ingress of external dust, effectively improving lubrication and dustproof performance, and extending service life.

[0049] Construction machinery can be mining trucks or other types of construction machinery; no further restrictions are imposed here.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pin hinge structure, characterized by, include: Mounting base (1); A pin (2) is disposed on the mounting base (1); The push rod (3) has a bearing (21) sleeved on the pin (2), and the sleeved end of the push rod (3) is sleeved on the bearing (21). The push rod (3) is rotatably connected to the pin (2) through the bearing (21). The dustproof component (4) is sleeved on the pin (2) and extends at least partially into the sleeve end of the thrust rod (3). The dustproof component (4), the thrust rod (3), the bearing (21) and the pin (2) together form a lubrication space for storing grease.

2. The pin hinge structure of claim 1, wherein The dustproof assembly (4) includes a retaining ring (41) and a dustproof ring (42). The retaining ring (41) is sleeved on the pin (2), and the dustproof ring (42) is sleeved on the retaining ring (41). The dustproof ring (42) extends at least partially into and abuts against the sleeved end of the thrust rod (3). The retaining ring (41), the dustproof ring (42), the thrust rod (3), the bearing (21), and the pin (2) together form the lubrication space.

3. The pin hinge structure of claim 2, wherein The inner peripheral wall of the dustproof ring (42) is in close contact with the outer peripheral wall of the retaining ring (41), and both the inner peripheral wall of the dustproof ring (42) and the outer peripheral wall of the retaining ring (41) are inclined relative to the axis of the pin (2).

4. The pin hinge structure of claim 2, wherein The retaining ring (41) and the pin (2) are fitted with a clearance.

5. The pin hinge structure of claim 1, wherein The mounting base (1) is provided with a hinge joint (11), the hinge joint (11) has a hinge hole (111), a bushing (22) is provided in the hinge hole (111), and the end of the pin (2) is fixedly inserted into the hinge hole (111) and passes through the bushing (22).

6. The pin hinge structure of claim 5, wherein Two hinge joints (11) are provided at intervals. The two opposite ends of the pin (2) are respectively connected to the hinge joints (11) at the corresponding ends. The ends of the bearing (21) and the thrust rod (3) are both located between the two hinge joints (11), and the dustproof component (4) is provided between the two opposite ends of the bearing (21) and the hinge joints (11) at the corresponding ends.

7. The pin hinge structure of claim 5, wherein The pin (2) is fixed to the mounting base (1) by a locking member (23). The hinge joint (11) has a first hole and a second hole, and the pin (2) has a third hole (24). The locking member (23) passes through the first hole, and the third hole (24) is fixedly connected to the second hole.

8. The pin hinge structure of claim 7, wherein The locking component (23) includes a locking bolt, the second hole is a threaded hole, the locking bolt passes through the first hole, and the third hole (24) is threadedly connected to the second hole.

9. The pin hinge structure of claim 5, wherein, The hinge hole (111) includes a first hole portion (1111) and a second hole portion (1112) arranged in a stepped shape. A stepped end face (1113) is connected between the first hole portion (1111) and the second hole portion (1112). The first hole portion (1111) is located on the side facing the thrust rod (3). The diameter of the first hole portion (1111) is smaller than the diameter of the second hole portion (1112). The bushing (22) is disposed in the second hole portion (1112) and abuts against the stepped end face (1113). The inner diameter of the bushing (22) is equal to the diameter of the first hole portion (1111).

10. A working machine, characterized in that The device includes the pin hinge structure as described in any one of claims 1-9, and also includes a vehicle body, wherein the mounting seat (1) is fixed to the vehicle body.

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