Supporting type floating oil cylinder telescopic boom structure for wet spraying machine

Abstract

The utility model discloses a supporting type floating oil cylinder telescopic boom frame structure for a wet spraying machine, which is characterized by comprising a basic boom, a plurality of telescopic booms sleeved on the basic boom, a supporting device and a telescopic driving mechanism, the plurality of telescopic booms are sleeved according to the size of the outer diameter, the telescopic driving mechanism comprises a plurality of oil cylinders, and the oil cylinders are connected with the supporting device. The two ends of the telescopic driving mechanism are connected with the basic arm and the telescopic arm with the smallest outer diameter respectively, and the supporting device is arranged on the end face of the telescopic arm and located between the telescopic driving mechanism and the inner wall of the adjacent telescopic arm. The oil cylinder follow-up supporting device stretches out and draws back along with the oil cylinder, the oil cylinder follow-up supporting device plays a role in supporting the oil cylinder in the action process of the oil cylinder, and it is avoided that the telescopic oil cylinder droops and extrudes an oil cylinder sealing piece after being unstable (including instability under the combined action of gravity and thrust) in the stretching-out and drawing-back process, and a cylinder rod is directly bent in a serious situation.

Description

Technical Field

[0001] The utility model relates to construction machinery, in particular to a support type floating oil cylinder telescopic boom structure for a wet shotcreting machine. Background Art

[0002] The telescopic boom device is the main actuator on various construction machinery devices. It is mostly made of low-alloy high-strength steel plates with large bending rigidity by welding to form a box-shaped thin-wall structure, with a large load capacity. The telescopic boom sleeved in the main boom can be freely telescoped by a hydraulic cylinder to meet the needs of different construction machinery devices.

[0003] For a general telescopic boom device, the cross-sectional forms of its fixed boom and telescopic boom are mainly quadrilateral structures. A slider is inserted between the telescopic boom and the fixed boom. When the boom telescopes, the relative movement on the surface of the slider is used to avoid direct contact between the telescopic boom and the fixed boom. However, due to the unstable mechanical properties and manufacturing quality of the boom body material, the contact state between the slider and the telescopic boom during operation of the telescopic boom is poor, greatly affecting the smoothness and centering performance of the telescopic boom during operation, resulting in large local stress of the telescopic boom and low service life. The telescopic oil cylinder of the boom often has poor rigidity and stability due to a large length / diameter ratio. After the telescopic oil cylinder bends to a certain extent, it will squeeze the oil cylinder seal to cause oil leakage, and even directly contact the inner wall of the boom to wear the oil cylinder.

[0004] Therefore, designing a telescopic boom structure with high structural strength, light weight, good centering performance and solving the instability of the telescopic oil cylinder to improve the service life of the oil cylinder has great practical significance for the development of construction machinery devices. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a support type floating oil cylinder telescopic boom structure for a wet shotcreting machine to solve the problem of poor contact state between the slider and the telescopic boom during operation in the prior art.

[0006] The utility model is realized by the following technical solutions: A support type floating oil cylinder telescopic boom structure for a wet shotcreting machine, characterized in that it includes a basic boom, a plurality of telescopic booms sleeved on the basic boom, a support device and a telescopic driving mechanism. The plurality of telescopic booms are sleeved in a hierarchical manner according to the outer diameter size. The telescopic driving mechanism includes a plurality of oil cylinders. Both ends of the telescopic driving mechanism are respectively connected to the basic boom and the telescopic boom with the smallest outer diameter. The support device is arranged at the end face of the telescopic boom and is located between the telescopic driving mechanism and the inner wall of the adjacent telescopic boom.

[0007] Further, the plurality of telescopic booms include a first telescopic boom and a second telescopic boom. The second telescopic boom is sleeved on the first telescopic boom, and the first telescopic boom is sleeved on the basic boom.

[0008] Furthermore, the support device is hinged to the end face of the second telescopic arm. The bottom of the support device is in direct contact with the first telescopic arm. The upper part of the support device abuts against the telescopic drive mechanism. The support device moves along the axial extension direction of the first telescopic arm with the second telescopic arm.

[0009] Furthermore, the support device is a roller structure.

[0010] Furthermore, the telescopic drive mechanism includes a first oil cylinder and a second oil cylinder. The first oil cylinder and the second oil cylinder are fixedly connected, and the telescopic directions of the first oil cylinder and the second oil cylinder are opposite.

[0011] Furthermore, the first oil cylinder is composed of a first telescopic oil cylinder and a first stretching arm. The first stretching arm is located inside the first telescopic oil cylinder and extends forward along the direction of the first telescopic oil cylinder. The second oil cylinder is composed of a second telescopic oil cylinder and a second stretching arm. The second stretching arm is located inside the second telescopic oil cylinder and extends backward along the direction of the second telescopic oil cylinder.

[0012] Furthermore, the second stretching arm is fixed to the second telescopic arm by a pin shaft. The second telescopic oil cylinder is fixed to the first telescopic arm by a pin shaft. The first stretching arm is fixed to the basic arm by a pin shaft.

[0013] Furthermore, a long hole is provided at the connection of the basic arm and the first stretching arm. The pin shaft is inserted into the long hole. The direction of the long hole is perpendicular to the telescopic direction of the boom, so that the first stretching arm can float freely in the direction of the long hole.

[0014] Furthermore, the cross-sections of the basic arm and multiple telescopic arms all adopt a hexagonal structure.

[0015] The beneficial effects of the supported floating oil cylinder telescopic boom structure for a wet shotcreting machine described in the present utility model include:

[0016] 1. Since the cross-section of the boom is hexagonal, compared with the quadrilateral in the prior art, the total number of sides increases. When both bear the same load, due to the increase in the number of sides, the stress received by the hexagon is more dispersed than the bearing capacity received by the quadrilateral, and the force on a single slider is smaller. As long as the force-bearing support surface of the hexagonal structure has good centering performance, the forces on each bearing surface are uniform, effectively avoiding local stress concentration;

[0017] 2. Due to the structural design of the fixed hinge and the floating hinge of the telescopic drive mechanism oil cylinders 2 and 1, when the boom deforms and the boom gap enlarges resulting in the boom sagging, the fixed hinge rotates freely and the floating joint floats up and down, thus effectively reducing the radial force borne by the oil cylinders;

[0018] 3. The oil cylinder follower support device moves with the telescopic movement of the oil cylinder and plays a role in supporting the oil cylinder during the operation of the oil cylinder to prevent the telescopic oil cylinder from sagging and squeezing the oil cylinder seal after instability (including instability under the combined action of gravity and thrust), and in severe cases, directly bending the cylinder rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a schematic structural diagram of a support type floating oil cylinder telescopic boom for a wet shotcreting machine;

[0021] Figure 2 It is a schematic cross-sectional view of the telescopic boom;

[0022] In the figure, 2 - basic boom; 3 - first telescopic boom; 4 - telescopic drive mechanism; 5 - second telescopic boom; 6 - first telescopic oil cylinder; 7 - second telescopic oil cylinder; 8 - first stretching arm; 9 - first oil cylinder; 10 - second stretching arm; 11 - second oil cylinder; 12 - support device; 13 - pin one; 14 - pin two; 15 - pin three. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0025] Such as Figure 1As shown in the figure, a support-type floating oil cylinder telescopic boom structure for a wet shotcreting machine includes a basic boom 2, a first telescopic boom 5, a second telescopic boom 3, a support device 12, and a telescopic drive mechanism 4. The second telescopic boom 3 is sleeved on the first telescopic boom 5, and sliders are inserted between the surfaces of the second telescopic boom 3 and the first telescopic boom 5. The first telescopic boom 5 is sleeved on the basic boom 2, and sliders are inserted between the surfaces of the first telescopic boom 5 and the fixed boom 2. In the telescopic drive mechanism 4, the second telescopic arm 10 is fixed to the second telescopic boom 3 through a first pin 13, and the telescopic drive mechanism 4 can rotate freely in the radial direction of the first pin 13. In the telescopic drive mechanism 4, the second telescopic oil cylinder 7 is fixed to the first telescopic boom 5 through a second pin 14, and the telescopic drive mechanism 4 can rotate freely in the radial direction of the second pin 14. The telescopic drive mechanism 4 is fixed to the basic boom 2 through a third pin 15, and the telescopic drive mechanism 4 can rotate freely in the radial direction of the third pin 15 and float freely in the vertical direction extending along the axis of the fixed boom. In the telescopic drive mechanism 4, the second telescopic oil cylinder 7 drives the second telescopic boom 3 to move along the axial extension direction of the first telescopic boom through the slider surface inside the first telescopic boom 5. In the telescopic drive mechanism 4, the first telescopic oil cylinder 6 drives the first telescopic boom 5 to move along the axial extension direction of the basic boom through the slider surface inside the basic boom 2. The support device 12 is hinged to the end face of the second telescopic boom through a pin. The bottom of the support device 12 is in direct contact with the first telescopic boom, and the upper part of the support device 12 abuts against the telescopic drive mechanism 4. The support device 12 moves along the axial extension direction of the first telescopic boom with the second telescopic boom, and will not cause the distance between the telescopic drive mechanism 9 and the first telescopic boom due to the drooping of the second telescopic boom. The cross-sections of the basic boom 2, the first telescopic boom 5, and the second telescopic boom 3 are rounded hexagons. The maximum load-bearing surfaces are both two support surfaces, so that the bearing capacity is dispersed. Moreover, as long as the centering performance of the force-bearing support surface of the hexagonal structure is good, the force on each load-bearing surface is uniform, and the dynamic load stability is good.

[0026] In the above embodiments, the basic principles, main features, and advantages of the present invention are described. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, any modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A support type floating oil cylinder telescopic boom structure for a wet shotcreting machine, characterized in that, It includes a basic arm (2), a plurality of telescopic arms sleeved on the basic arm (2), a support device (12), and a telescopic drive mechanism (4). The plurality of telescopic arms are sleeved in a hierarchical manner according to the outer diameter size. The telescopic drive mechanism (4) includes a plurality of oil cylinders. Both ends of the telescopic drive mechanism (4) are respectively connected to the basic arm (2) and the telescopic arm with the smallest outer diameter. The support device (12) is arranged on the end face of the telescopic arm and is located between the telescopic drive mechanism (4) and the inner wall of the adjacent telescopic arm; The plurality of telescopic arms include a first telescopic arm (5) and a second telescopic arm (3). The second telescopic arm (3) is sleeved on the first telescopic arm (5), and the first telescopic arm (5) is sleeved on the basic arm (2); The support device (12) is hinged to the end face of the second telescopic arm (3). The bottom of the support device (12) is in direct contact with the first telescopic arm. The upper part of the support device (12) abuts against the telescopic drive mechanism (4). The support device (12) moves along with the second telescopic arm in the axial extension direction of the first telescopic arm; The telescopic drive mechanism (4) includes a first oil cylinder (9) and a second oil cylinder (11). The first oil cylinder (9) and the second oil cylinder (11) are fixedly connected, and the telescopic directions of the first oil cylinder (9) and the second oil cylinder (11) are opposite; The first oil cylinder (9) is composed of a first telescopic oil cylinder (6) and a first stretching arm (8). The first stretching arm (8) is located inside the first telescopic oil cylinder (6) and extends forward along the direction of the first telescopic oil cylinder (6). The second oil cylinder (11) is composed of a second telescopic oil cylinder (7) and a second stretching arm (10). The second stretching arm (10) is located inside the second telescopic oil cylinder (7) and extends backward along the direction of the second telescopic oil cylinder (7); The second stretching arm (10) is fixed to the second telescopic arm (3) through a first pin shaft (13). The second telescopic oil cylinder (7) is fixed to the first telescopic arm (5) through a second pin shaft (14). The first stretching arm (8) is fixed to the basic arm (2) through a third pin shaft (15); A long hole is provided at the connection of the basic arm (2) and the first stretching arm (8). The third pin shaft (15) is inserted into the long hole. The direction of the long hole is perpendicular to the telescopic direction of the boom, so that the first stretching arm (8) can float freely in the direction of the long hole; The cross-sections of the basic arm (2) and the plurality of telescopic arms all adopt a hexagonal structure.

2. The supporting floating oil cylinder telescopic boom structure for a wet shotcreting machine according to claim 1, characterized in that, The support device (12) is a roller structure.

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