Self-lubricating rear sliding block assembly and crane

Abstract

The utility model relates to a kind of self-lubricating rear upper slider assembly and crane, belong to crane technical field, it is characterized in that, including support seat, left rear upper slider, right rear upper slider, the bottom of the support seat is used to fixedly connected to the root of boom body, its top is symmetrically provided with two support cavities, the left rear upper slider and right rear upper slider are respectively fixedly installed in two support cavities, and left and right symmetrical arrangement is presented;The left rear upper slider and right rear upper slider all include main bearing surface, outer side, mounting surface;Main bearing surface is equipped with lubricating oil groove, for forming lubricating friction pair with the corresponding surface of last section arm body;Main bearing surface is connected with the outer side by arc transition surface;Oil injection port is provided on the outer side, and oil delivery channel is provided in the two rear upper sliders;One end of the oil delivery channel is communicated with lubricating oil groove, and the other end is communicated with the oil injection port.The utility model uses modular structure, and assembly is simple, and continuous, efficient, convenient lubrication can be realized.

Description

Technical Field

[0001] This utility model relates to a self-lubricating rear upper slider assembly and a crane, belonging to the field of crane technology. Background Technology

[0002] In construction machinery such as cranes, a slider assembly is provided between every two telescopic boom sections. The slider assembly is fixed on one of the telescopic boom sections to prevent direct contact and friction between the two telescopic boom sections.

[0003] As the main load-bearing slider, the rear upper slider bears a greater load. Lubrication failure will lead to severe dry friction, potentially causing safety accidents. To reduce the coefficient of friction, the surface of the rear upper slider is usually coated with grease. However, due to the small gap between the rear upper slider and the upper boom cylinder in the existing structure, it is not conducive to the formation of a lubricating oil film, easily causing grease to accumulate at the boom head. This not only affects the overall aesthetics of the vehicle but also severely impacts the lubrication effect of the slider, failing to effectively reduce the coefficient of friction. This results in increased friction during the boom's extension and retraction, affecting boom extension and retraction, and causing vibration and other problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the prior art by providing a self-lubricating rear upper slide block assembly and crane, which adopts a modular structure, is easy to assemble, and can achieve continuous, efficient, and convenient lubrication.

[0005] The first objective of this utility model is to provide a self-lubricating rear upper slider assembly, characterized by comprising a support base, a left rear upper slider, and a right rear upper slider. The bottom of the support base is fixedly connected to the root of the boom body, and two support cavities are symmetrically arranged on its top. The left and right rear upper sliders are respectively fixedly installed in the two support cavities and arranged symmetrically from left to right. Both the left and right rear upper sliders include a main bearing surface, an outer surface, and a mounting surface. A lubricating oil groove is provided on the main bearing surface for forming a lubricating friction pair with the corresponding surface of the upper boom section. The main bearing surface and the outer surface are connected by an arc transition surface. An oil inlet is provided on the outer surface, and an oil delivery channel is provided inside each of the two rear upper sliders. One end of the oil delivery channel is connected to the lubricating oil groove, and the other end is connected to the oil inlet.

[0006] In the above solution, the oil injection port, oil delivery channel, and lubricating oil groove are integrated into the rear upper slider to construct an integrated self-lubricating system. Lubricating grease can be injected from the external oil injection port and actively and accurately delivered to the core friction interface (the lubricating oil groove of the main bearing surface) through the internal channel, achieving continuous, efficient, and convenient lubrication.

[0007] The lubricating oil groove can be configured with different types of lubricating media as needed, and combined with the upper rear slider to form a novel slider mechanism. This enables the slider to achieve self-lubrication, maintenance-free operation, and reduced material costs. The lubricating oil groove has a non-perforated structure, with interconnected internal parts and a closed external perimeter, ensuring uniform lubrication at all lubrication points.

[0008] The main bearing surface and the outer side are connected by a rounded transition surface. There is a certain gap between the rounded transition surface and the rounded corner of the upper boom to avoid the rounded surface from contacting and jamming during the movement of the boom. This also alleviates problems such as boom shaking caused by the impact of hydraulic cylinder acceleration due to jamming.

[0009] Preferably, the lubricating oil groove is formed by multiple horizontal oil grooves and multiple vertical oil grooves intersecting and connecting with each other, so as to ensure that the lubricating grease is quickly distributed to all areas of the main bearing surface and avoid the occurrence of lubrication dead zones.

[0010] Preferably, the lubricating oil groove is arranged in a star shape. When the boom is working, it is easy to sway. Therefore, there is still a lateral shear force between the upper rear slider and the boom body. The inclined groove in the star shape structure can guide the grease to flow obliquely, so as to deal with the lateral shear force and distribute the lubricating grease in multiple directions, thereby reducing the coefficient of friction.

[0011] Preferably, the lubricating oil groove is provided with deep groove areas at both ends along the extension and retraction direction of the boom, which can impede the outward flow of grease and prevent lateral leakage of lubricating oil.

[0012] Preferably, the support base includes a support base body, a front end plate and a rear end plate fixedly connected to its front and rear ends, and a left side plate and a right side plate fixedly connected to its left and right sides; the front end plate, rear end plate, left side plate, right side plate and the support base body together form the two support cavities.

[0013] In the above scheme, the main bearing surface of the rear upper slider forms a self-lubricating friction pair with the upper arm body, confining the two rear upper sliders within the corresponding support cavity; the front and rear end plates respectively limit the rear upper sliders in the forward and backward directions of the boom extension and retraction movement, and the distance between the front and rear end plates matches the length of the rear upper slider in the boom extension and retraction direction, ensuring that the rear upper sliders will not undergo longitudinal displacement; the left and right side plates respectively limit the corresponding sliders from the side, so that even when the boom cylinder sways or the slider is subjected to lateral force, the rear upper sliders will not undergo lateral displacement.

[0014] Preferably, the oil inlet is equipped with an oil plug, and the left and right side plates each have a clearance opening at a position corresponding to the oil plug; when installed, the outer surface of the oil plug does not protrude from the outer surface of the corresponding side plate. Through the clearance openings on the side plates and the non-protruding design of the oil plug, the oil plug is hidden within the contour of the support base, achieving effective protection.

[0015] Preferably, a pad is provided at the bottom of each support cavity, the pad being located between the mounting surface of the corresponding upper rear slider and the bottom of the support cavity. The pad is mounted on the support base by fixing bolts, and a pad of appropriate size can be selected as needed to adjust the gap between the upper rear slider and the boom. A clearance cavity is provided on the mounting surface of the upper rear slider, corresponding to the fixing bolt and used to accommodate the corresponding fixing bolt. A second objective of this invention is to provide a crane characterized in that the above-mentioned self-lubricating upper rear slider assembly is installed at the root of the boom.

[0016] The self-lubricating upper rear slider assembly of this utility model is mainly used in the upper rear part of the crane boom. The front and rear end plates effectively prevent longitudinal displacement of the upper rear slider. The side plates effectively prevent the upper rear slider from sliding down due to boom swaying. The oil injection port reserved in the upper rear slider injects flowing lubricant, which is delivered to the working plane (main bearing surface) through the internal oil channel. The extension and retraction of the boom drives the lubricant to the entire working surface of the boom, thus achieving a lubrication effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention installed on the arm body; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the support base in this utility model; Figure 4 This is a schematic diagram of the side plate structure in this utility model; Figure 5 This is a schematic diagram of the main bearing surface of the rear upper slider in this utility model; Figure 6 This is a schematic diagram of the internal structure of the rear upper slider in this utility model; Figure 7 This is a schematic diagram of the mounting surface of the rear upper slider in this utility model; In the diagram: 1. Support base, 2. Left rear upper slider, 3. Right rear upper slider, 4. Support cavity, 5. Main bearing surface, 6. Outer side surface, 7. Mounting surface, 8. Arc transition surface, 9. Lubricating oil groove, 10. Oil inlet, 11. Oil supply channel, 12. Deep groove area, 13. Support base body, 14. Front end plate, 15. Rear end plate, 16. Left side plate, 17. Right side plate, 18. Oil plug, 19. Clearance port, 20. Pad, 21. Fixing bolt, 22. Clearance cavity, 23. Arm body, 24. Self-lubricating rear upper slider assembly. Detailed Implementation

[0018] A self-lubricating rear upper slider assembly, such as Figure 2-4As shown, it includes a support base 1, a left rear upper slider 2, and a right rear upper slider 3. The bottom of the support base is used to fix it to the root of the boom body. Two support cavities 4 are symmetrically arranged on its top. The left rear upper slider and the right rear upper slider are fixedly installed in the two support cavities and are arranged symmetrically from left to right.

[0019] Both the left and right rear upper sliders include a main bearing surface 5, an outer surface 6, and a mounting surface 7. The main bearing surface and the outer surface are connected by an arc transition surface 8. Figure 6 As shown, a lubricating oil groove 9 is provided on the main bearing surface, and an oil inlet 10 is provided on the outer side surface. Both rear upper sliders are provided with oil delivery channels 11. One end of the oil delivery channel is connected to the lubricating oil groove, and the other end is connected to the oil inlet. Lubricating grease can be injected from the external oil inlet and delivered to the lubricating oil groove on the main bearing surface through the internal channel to achieve continuous, efficient and convenient lubrication.

[0020] In one embodiment of this utility model, such as Figure 5 As shown, the lubricating oil groove is composed of multiple horizontal oil grooves and multiple vertical oil grooves that intersect and connect with each other. Deep groove areas 12 are respectively provided at the front and rear ends of the lubricating oil groove along the extension and retraction direction of the boom, which have a blocking effect on the outward flow of grease.

[0021] In one embodiment of the present invention, the support base includes a support base body 13, a front end plate 14 and a rear end plate 15 fixedly connected to its front and rear ends, and a left side plate 16 and a right side plate 17 fixedly connected to its left and right sides. The front end plate, the rear end plate, the left side plate, the right side plate and the support base body together form two support cavities.

[0022] In one embodiment of this utility model, the oil inlet is provided with an oil plug 18, and the left side plate and the right side plate are respectively provided with clearance openings 19 at positions corresponding to the oil plug; when the oil plug is installed, its outer surface does not protrude from the outer surface of the corresponding side plate.

[0023] In one embodiment of the present invention, a pad 20 is provided at the bottom of each support cavity. The pad is installed on the support base by fixing bolts 21. An avoidance cavity 22 is provided on the mounting surface of the upper rear slider, and the avoidance cavity corresponds to the fixing bolt.

[0024] In one embodiment of this utility model, such as Figure 1 As shown, a crane has a self-lubricating upper slide block assembly installed at the root of its boom.

Claims

1. A self-lubricating rear upper slider assembly, characterized in that, It includes a support base, a left rear upper slider, and a right rear upper slider. The bottom of the support base is used to be fixedly connected to the root of the boom body, and two support cavities are symmetrically arranged on its top. The left rear upper slider and the right rear upper slider are respectively fixedly installed in the two support cavities and are arranged symmetrically from left to right. The left rear upper slider and the right rear upper slider both include a main bearing surface, an outer surface, and a mounting surface. The main bearing surface is provided with a lubricating oil groove for forming a lubricating friction pair with the corresponding surface of the upper arm body; the main bearing surface and the outer side are connected by an arc transition surface; an oil injection port is provided on the outer side, and an oil supply channel is provided inside the two rear upper sliders; one end of the oil supply channel is connected to the lubricating oil groove, and the other end is connected to the oil injection port.

2. The self-lubricating rear upper slider assembly according to claim 1, characterized in that, The lubricating oil groove is formed by multiple horizontal oil grooves and multiple vertical oil grooves that intersect and connect with each other.

3. The self-lubricating rear upper slider assembly according to claim 1, characterized in that, The lubricating oil grooves are arranged in a star-shaped pattern.

4. A self-lubricating rear upper slider assembly according to claim 2 or 3, characterized in that, The lubricating oil tank has deep grooves at both ends along the extension and retraction direction of the boom to prevent lateral leakage of lubricating grease.

5. The self-lubricating rear upper slider assembly according to claim 1, characterized in that, The support base includes a support base body, a front end plate and a rear end plate fixedly connected to its front and rear ends, and a left side plate and a right side plate fixedly connected to its left and right sides; the front end plate, rear end plate, left side plate, right side plate and the support base body together form the two support cavities.

6. The self-lubricating rear upper slider assembly according to claim 5, characterized in that, The oil inlet is equipped with an oil plug, and the left and right side plates are respectively provided with clearance openings at positions corresponding to the oil plug; when the oil plug is installed, its outer surface does not protrude from the outer surface of the corresponding side plate.

7. The self-lubricating rear upper slider assembly according to claim 1, characterized in that, Each support cavity has a pad at its bottom, which is located between the mounting surface of the corresponding upper slider and the bottom of the support cavity.

8. The self-lubricating rear upper slider assembly according to claim 7, characterized in that, The pad is installed on the support base by fixing bolts.

9. The self-lubricating rear upper slider assembly according to claim 8, characterized in that, The mounting surface of the upper rear slider is provided with a clearance cavity, which corresponds to the fixing bolt and is used to accommodate the corresponding fixing bolt.

10. A crane, characterized in that, The boom of the crane is equipped with a self-lubricating upper slider assembly as described in any one of claims 1-9 at the base of the boom.

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