Handrail device and excavator

Abstract

The present invention discloses a handrail device, comprising a first mounting plate, a second mounting plate, a first handrail tube connected to the first mounting plate, a second handrail tube, a third handrail tube and a fourth handrail tube connected to the second mounting plate; the first handrail tube is sleeved with one end of the second handrail tube through a first energy absorbing assembly, and the second handrail tube can move along the axial direction of the tube end connected to the first handrail tube; the other end of the second handrail tube is connected to one end of the third handrail tube; the other end of the third handrail tube is sleeved with the fourth handrail tube through a third energy absorbing assembly, and the third handrail tube can move along the axial direction of the tube end connected to the fourth handrail tube. The present invention also discloses an excavator. The handrail device of the present invention can realize axial movement in multiple directions, effectively reduce the generation of internal stress, and reduce the risk of cracking at the weld and breaking of the connecting bolts.

Description

Technical Field

[0001] The present invention relates to a handrail, in particular to a handrail device; in addition, it also relates to an excavator with the handrail device. Background Art

[0002] Because large and medium-sized excavators are relatively tall, operators need to frequently climb onto the upper frame of the excavator to check the situation. This requires that handrails must be installed on the upper frame to ensure the safety of operators.

[0003] At present, the handrails on excavators are very common as the vibration of the excavator becomes more and more intense during operation. The common handrail structure on excavators is generally a round tube that is bent and welded with mounting plates at both ends and fixed on the frame. Due to deformation caused by welding and installation, internal stress is easily generated at the handrail weld and connecting bolts, resulting in cracks at the handrail weld and broken connecting bolts.

[0004] Specifically, if Figure 1 As shown, the existing handrail structure is mainly composed of a frame mounting plate 1a, a first curved pipe 2a, a second curved pipe 3a, a straight pipe 4a, a fuel tank mounting plate 5a and other structures welded together. The frame mounting plate 1a is fixed on the upper frame, and the fuel tank mounting plate 5a is fixed on the fuel tank. However, in actual assembly, the handrail structure is difficult to install. For installation, the threaded holes of the mounting plate need to be forced to align. Due to welding deformation and installation deformation, internal stress is generated at the welds and connecting bolts of the handrail structure, which causes the problem that the welds and connecting bolts of the handrail structure are prone to early failure.

[0005] Therefore, it is necessary to design a new handrail device to overcome or alleviate the above-mentioned technical problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an armrest device which can realize axial movement in multiple directions, effectively reduce the generation of internal stress, and reduce the risk of cracking at the weld and breaking of the connecting bolts.

[0007] A further technical problem to be solved by the present invention is to provide an excavator having an armrest device with excellent safety performance.

[0008] In order to solve the above technical problems, the present invention provides a handrail device, including a first mounting plate, a second mounting plate, a first handrail tube connected to the first mounting plate, a second handrail tube, a third handrail tube and a fourth handrail tube connected to the second mounting plate; the first handrail tube is sleeved with one end of the second handrail tube through a first energy absorbing component, and the second handrail tube can move along the axial direction of the tube end connected to the first handrail tube; the other end of the second handrail tube is connected to one end of the third handrail tube;; the other end of the third handrail tube is sleeved with the fourth handrail tube through a third energy absorbing component, and the third handrail tube can move along the axial direction of the tube end connected to the fourth handrail tube.

[0009] Preferably, the other end of the second handrail tube is sleeved with one end of the third handrail tube through a second energy absorbing assembly, and the third handrail tube can move along the axial direction of the tube end connected to the second handrail tube.

[0010] Preferably, the axial direction of the tube end connecting the second handrail tube to the first handrail tube, the axial direction of the tube end connecting the third handrail tube to the second handrail tube, and the axial direction of the tube end connecting the third handrail tube to the fourth handrail tube intersect each other.

[0011] Specifically and preferably, the first handrail tube and the fourth handrail tube are both straight tubes, the second handrail tube is a curved tube, and the third handrail tube is a multi-curved tube; the axial direction of the tube end of the second handrail tube connected to the first handrail tube, the axial direction of the tube end of the third handrail tube connected to the second handrail tube, and the axial direction of the tube end of the third handrail tube connected to the fourth handrail tube are perpendicular to each other.

[0012] Specifically, the first energy absorbing component includes a first elastic member and a first compression connector, the first elastic member is sleeved with the outer surface of one of the first handrail tube and the second handrail tube, and is sleeved with the inner surface of the other, the first handrail tube is connected to the second handrail tube through the first compression connector, so that the first handrail tube and the first elastic member, as well as the first elastic member and the second handrail tube can be interference fit respectively; the third energy absorbing component includes a third elastic member and a third compression connector, the third elastic member is sleeved with the outer surface of one of the third handrail tube and the fourth handrail tube, and is sleeved with the inner surface of the other, the third handrail tube is connected to the fourth handrail tube through the third compression connector, so that the third handrail tube and the third elastic member, as well as the third elastic member and the fourth handrail tube can be interference fit respectively.

[0013] Furthermore, the second energy absorbing assembly includes a second elastic member and a second compression connector, the second elastic member is sleeved with the outer surface of one of the second handrail tube and the third handrail tube, and is sleeved with the inner surface of the other, the second handrail tube is connected to the third handrail tube through the second compression connector, so that the second handrail tube and the second elastic member, as well as the second elastic member and the third handrail tube, can be interference fit respectively.

[0014] Furthermore, the outer contours of the first elastic member, the second elastic member and the third elastic member are all conical.

[0015] Specifically, the first elastic member, the second elastic member and the third elastic member are one of a rubber sleeve, a nylon sleeve or a silicone sleeve.

[0016] More specifically, the first compression connector, the second compression connector and the third compression connector are all threaded sleeves, one end of the threaded sleeve is formed with a flange protruding inwardly along the circumferential direction, and the other end thereof is formed with an internal thread.

[0017] The present invention also provides an excavator, comprising the handrail device described in any one of the above technical solutions.

[0018] Typically, the first mounting plate is connected to a fuel tank of the excavator, and the second mounting plate is connected to an upper frame of the excavator.

[0019] Through the above technical solution, the beneficial effects of the present invention are as follows:

[0020] In the basic technical scheme of the present invention, energy absorbing structures such as the first energy absorbing assembly and the third energy absorbing assembly are cleverly designed. By utilizing the above energy absorbing structure, the second handrail tube can move along the axial direction of the tube end connected to the first handrail tube, and the third handrail tube can also move along the axial direction of the tube end connected to the fourth handrail tube, that is, the handrail device can be adjusted in multiple directions. This structural design can reduce the assembly errors caused by processing and manufacturing, and is easy to install. In other words, it can eliminate the internal stress caused by installation deformation and welding deformation, reduce the risk of cracking at the handrail weld and breakage of the connecting bolts, and solve the problem of early failure of the handrail welds and connecting bolts.

[0021] Furthermore, a second energy absorbing component is designed so that the armrest device can be adjusted in more directions.

[0022] Moreover, the energy absorbing structures such as the first energy absorbing assembly, the second energy absorbing assembly and the third energy absorbing assembly adopt a rubber sleeve and a threaded sleeve combination structure, which can buffer and absorb vibration when the excavator is working.

[0023] Furthermore, the rubber sleeve can be designed as a conical tube for easy assembly, so that the interconnected handrail tubes can be connected by extrusion to avoid separation from each other. This movable connection is also convenient for disassembly.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the handrail structure of the prior art;

[0026] Figure 2 is a structural schematic diagram of an armrest device according to a specific embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of an energy absorbing assembly according to a specific embodiment of the present invention;

[0028] Figure 4 It is a structural schematic diagram of an excavator according to a specific embodiment of the present invention.

[0029] Description of Reference Numerals

[0030] 1First mounting plate 2Second mounting plate

[0031] 3First handrail tube 4Second handrail tube

[0032] 5Third handrail tube 6Fourth handrail tube

[0033] 7 first energy absorbing component 8 second energy absorbing component

[0034] 9Third energy absorbing component 100 rubber sleeve

[0035] 101 threaded sleeve 102 first connecting pipe

[0036] 103 Second connecting pipe 200 on the frame

[0037] 201 fuel tank 1a frame mounting plate

[0038] 2a First bend 3a Second bend

[0039] 4a straight pipe 5a fuel tank mounting plate DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0041] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of the said features.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figures 2 to 4 As shown, the handrail device of the basic embodiment of the present invention comprises a first mounting plate 1, a second mounting plate 2, a first handrail tube 3 connected to the first mounting plate 1, a second handrail tube 4, a third handrail tube 5 and a fourth handrail tube 6 connected to the second mounting plate 2; the first handrail tube 3 is sleeved with one end of the second handrail tube 4 through a first energy absorbing component 7, and the second handrail tube 4 can move along the axial direction of the tube end connected to the first handrail tube 3; the other end of the second handrail tube 4 is connected to one end of the third handrail tube 5; the other end of the third handrail tube 5 is sleeved with the fourth handrail tube 6 through a third energy absorbing component 9, and the third handrail tube 5 can move along the axial direction of the tube end connected to the fourth handrail tube 6.

[0044] The handrail device is mainly composed of a first handrail tube 3, a second handrail tube 4, a third handrail tube 5 and a fourth handrail tube 6 connected in sequence, and a first energy absorption assembly 7, a third energy absorption assembly 9 and other energy absorption mechanisms are respectively installed between the first handrail tube 3 and the second handrail tube 4 and between the third handrail tube 5 and the fourth handrail tube 6, so that the second handrail tube 4 can move along the axial direction of the tube end connected to the first handrail tube 3, and the third handrail tube 5 can move along the axial direction of the tube end connected to the fourth handrail tube 6; the above structural design enables the handrail device to move in multiple directions. During the assembly process of the device being installed on the excavator through the first mounting plate 1 and the second mounting plate 2, the positional relationship among the first handrail tube 3, the second handrail tube 4, the third handrail tube 5 and the fourth handrail tube 6 is adjusted to achieve movement of the handrail device in all directions, thereby effectively avoiding the problem of forced alignment during assembly of the first mounting plate 1 and the second mounting plate 2, making assembly more convenient, and effectively reducing the internal stress caused by installation deformation and welding deformation, thereby reducing the risk of cracking at the handrail weld and breaking of the connecting bolts, and solving the problem of early failure of the handrail weld and connecting bolts.

[0045] Furthermore, the other end of the second handrail tube 4 is sleeved with one end of the third handrail tube 5 through the second energy absorbing assembly 8, and the third handrail tube 5 can move along the axial direction of the tube end connected to the second handrail tube 4; a second energy absorbing assembly 8 is arranged between the second handrail tube 4 and the third handrail tube 5, so that the third handrail tube 5 can move along the axial direction of the tube end connected to the second handrail tube 4, thereby allowing the handrail device to flexibly move in more directions.

[0046] Furthermore, the three directions of the axial direction of the tube end of the second handrail tube 4 connected to the first handrail tube 3, the axial direction of the tube end of the third handrail tube 5 connected to the second handrail tube 4, and the axial direction of the tube end of the third handrail tube 5 connected to the fourth handrail tube 6 intersect each other, and the three directions can correspond one-to-one with the three axial directions of the three-dimensional rectangular coordinate system. For example, a three-dimensional rectangular coordinate system is established so that the three directions of the axial direction of the tube end of the second handrail tube 4 connected to the first handrail tube 3, the axial direction of the tube end of the third handrail tube 5 connected to the second handrail tube 4, and the axial direction of the tube end of the third handrail tube 5 connected to the fourth handrail tube 6 are respectively aligned with the X-axis direction, the Y-axis direction, and the Z-axis direction. One-to-one correspondence, of course, it is not required that the axial direction of the tube end connected to the second handrail tube 4 and the first handrail tube 3, the axial direction of the tube end connected to the third handrail tube 5 and the second handrail tube 4, and the axial direction of the tube end connected to the third handrail tube 5 and the fourth handrail tube 6 are strictly consistent with the X-axis direction, the Y-axis direction and the Z-axis direction respectively, so that the axial direction of the tube end connected to the second handrail tube 4 and the first handrail tube 3, the axial direction of the tube end connected to the third handrail tube 5 and the second handrail tube 4, and the axial direction of the tube end connected to the third handrail tube 5 and the fourth handrail tube 6 have a certain angle with the corresponding axial direction, thereby realizing the adjustment of the handrail device in the three degrees of freedom directions.

[0047] In order to better understand the technical concept of the present invention, the handrail device of the present invention is applied to an excavator for further explanation.

[0048] The handrail device of the present invention is installed on the excavator, so that the second handrail tube 4 is along the axial direction of the tube end connected to the first handrail tube 3, the third handrail tube 5 is along the axial direction of the tube end connected to the second handrail tube 4, and the third handrail tube 5 is along the axial direction of the tube end connected to the fourth handrail tube 6, respectively corresponding to one direction; preferably, refer to Figure 2The first mounting plate 1 is connected to the upper frame 200 of the excavator, and the second mounting plate 2 is connected to the oil tank 201 of the excavator. At the same time, the first handrail tube 3 and the fourth handrail tube 6 are designed as straight tubes, the second handrail tube 4 is designed as a curved tube, and the third handrail tube 5 is designed as a multi-bend curved tube, so that the axial direction of the tube end where the second handrail tube 4 is connected to the first handrail tube 3 is parallel to the front and rear direction of the excavator, the axial direction of the tube end where the third handrail tube 5 is connected to the second handrail tube 4 is parallel to the left and right direction of the excavator, and the axial direction of the tube end where the third handrail tube 5 is connected to the fourth handrail tube 6 is parallel to the up and down direction of the excavator, so that the handrail device can be moved in three directions: up, down, left, right, front and back.

[0049] It should be noted that the above technical solution is only a connection method between the first handrail tube 3, the second handrail tube 4, the third handrail tube 5 and the fourth handrail tube 6 of the handrail device. By deforming the structural form of the first handrail tube 3, the second handrail tube 4, the third handrail tube 5 and the fourth handrail tube 6 or the overall installation form of the handrail device, the axial direction of the tube end of the second handrail tube 4 connected to the first handrail tube 3, the axial direction of the tube end of the third handrail tube 5 connected to the second handrail tube 4, and the axial direction of the tube end of the third handrail tube 5 connected to the fourth handrail tube 6 can be changed; for example, by deforming the first handrail tube 3 into a curved tube, the axial direction of the tube end of the second handrail tube 4 connected to the first handrail tube 3 can be made parallel to the left and right directions of the excavator. In the direction, the fourth handrail tube 6 is deformed into a bent tube, and the shapes of the bent tubes at both ends of the third handrail tube 5 are changed at the same time, so that the axial direction of the tube end where the third handrail tube 5 is connected to the fourth handrail tube 6 is parallel to the front-rear direction of the excavator, and the axial direction of the tube end where the third handrail tube 5 is connected to the second handrail tube 4 is parallel to the up-down direction of the excavator; or, the first mounting plate 1 is connected to the oil tank 201 of the excavator, and the second mounting plate 2 is connected to the upper frame 200 of the excavator, and the axial direction of the tube end where the second handrail tube 4 is connected to the first handrail tube 3, the axial direction of the tube end where the third handrail tube 5 is connected to the second handrail tube 4, and the axial direction of the tube end where the third handrail tube 5 is connected to the fourth handrail tube 6 can be changed. In addition, the axial direction of the tube end where the second handrail tube 4 is connected to the first handrail tube 3, the axial direction of the tube end where the third handrail tube 5 is connected to the second handrail tube 4, and the axial direction of the tube end where the third handrail tube 5 is connected to the fourth handrail tube 6 do not need to be strictly consistent with the three-dimensional directions of the excavator, and can have a certain deviation or even be completely different, and the handrail device can also be moved in multiple directions. This structural design that can be adjusted in multiple directions can not only reduce the risk of cracking at the handrail weld and breaking of the connecting bolts, but also can adapt to the installation of various types of excavators, has good versatility, and is convenient for unified design.

[0050] Furthermore, energy absorbing structures such as the first energy absorbing assembly 7, the second energy absorbing assembly 8, and the third energy absorbing assembly 9 can be composed of elastic parts and compression connectors. The elastic parts are sleeved between adjacent handrail tubes, and the elastic parts are squeezed by the compression connectors to press the adjacent handrail tubes together through the elastic parts, thereby forming a movable connection, which not only ensures the connection strength, but also does not affect the smaller axial movement between adjacent handrail tubes, and is also easy to disassemble.

[0051] Specifically, the first energy absorbing assembly 7 includes a first elastic member and a first compression connector. Figure 3 , the first elastic member is sleeved with the inner surface of the first handrail tube 3, and the first elastic member is sleeved with the outer surface of the second handrail tube 4, the first clamping connector is sleeved on the second handrail tube 4, and has a clearance fit with the second handrail tube 4, the first clamping connector is connected to the outer surface of the first handrail tube 3, and can move along the axial direction to squeeze the first elastic member, so that the first handrail tube 3, the first elastic member and the second handrail tube 4 are in a clamped state, that is, the first handrail tube 3 and the first elastic member, and the first elastic member and the second handrail tube 4 can be respectively interference fit, and the first handrail tube 3, the first elastic member and the second handrail tube 4 constitute a form of active connection; or The first elastic member is sleeved with the inner surface of the second handrail tube 4, and the first elastic member is sleeved with the outer surface of the first handrail tube 3, the first clamping connector is sleeved on the first handrail tube 3, and is clearance-matched with the first handrail tube 3, the first clamping connector is connected to the outer surface of the second handrail tube 4, and can move along the axial direction to squeeze the first elastic member, so that the first handrail tube 3, the first elastic member and the second handrail tube 4 are in a clamped state, that is, the first handrail tube 3 and the first elastic member, and the first elastic member and the second handrail tube 4 can be interference-fitted respectively, and the first handrail tube 3, the first elastic member and the second handrail tube 4 constitute a form of movable connection.

[0052] Similarly, the second energy absorbing assembly 8 includes a second elastic member and a second compression connector, the second elastic member is sleeved with the inner surface of the second handrail tube 4, and the second elastic member is sleeved with the outer surface of the third handrail tube 5, the second compression connector is sleeved on the third handrail tube 5, and has a clearance fit with the third handrail tube 5, the second compression connector is connected to the outer surface of the second handrail tube 4, and can move along the axial direction to squeeze the second elastic member, so that the second handrail tube 4, the second elastic member and the third handrail tube 5 are in a compression state, that is, the second handrail tube 4 and the second elastic member, and the second elastic member and the third handrail tube 5 can be respectively interference fit, the second handrail tube 4, the second elastic member and the third handrail tube 5 It constitutes a form of active connection; or, the second elastic member is sleeved on the inner surface of the third handrail tube 5, and the second elastic member is sleeved on the outer surface of the second handrail tube 4, the second clamping connector is sleeved on the second handrail tube 4, and is gap-fitted with the second handrail tube 4, the second clamping connector is connected to the outer surface of the third handrail tube 5, and can move along the axial direction to squeeze the second elastic member, so that the second handrail tube 4, the second elastic member and the third handrail tube 5 are in a clamped state, that is, the second handrail tube 4 and the second elastic member, and the second elastic member and the third handrail tube 5 can be interference-fitted respectively, and the second handrail tube 4, the second elastic member and the third handrail tube 5 constitute a form of active connection.

[0053] Moreover, the third energy absorbing component 9 includes a third elastic member and a third clamping connector, the third elastic member is sleeved with the inner surface of the third handrail tube 5, and the third elastic member is sleeved with the outer surface of the fourth handrail tube 6, the third clamping connector is sleeved on the fourth handrail tube 6, and has a clearance fit with the fourth handrail tube 6, the third clamping connector is connected to the outer surface of the third handrail tube 5, and can move along the axial direction to squeeze the third elastic member, so that the third handrail tube 5, the third elastic member and the fourth handrail tube 6 are in a clamped state, that is, the third handrail tube 5 and the third elastic member, and the third elastic member and the fourth handrail tube 6 can be respectively interference fit, the third handrail tube 5, the third elastic member and the fourth handrail tube 6 It constitutes a form of active connection; or, the third elastic member is sleeved on the inner surface of the fourth handrail tube 6, and the third elastic member is sleeved on the outer surface of the third handrail tube 5, the third clamping connector is sleeved on the third handrail tube 5, and is gap-fitted with the third handrail tube 5, the third clamping connector is connected to the outer surface of the fourth handrail tube 6, and can move along the axial direction to squeeze the third elastic member, so that the third handrail tube 5, the third elastic member and the fourth handrail tube 6 are in a clamped state, that is, the third handrail tube 5 and the third elastic member, and the third elastic member and the fourth handrail tube 6 can be interference-fitted respectively, and the third handrail tube 5, the third elastic member and the fourth handrail tube 6 constitute a form of active connection.

[0054] Among them, the first elastic member, the second elastic member and the third elastic member can be selected as a rubber sleeve 100, a nylon sleeve or a silicone sleeve, etc. In order to facilitate the extrusion of the first elastic member, the second elastic member and the third elastic member, the longitudinal cross-section shape of the first elastic member, the second elastic member and the third elastic member can be a wedge shape, that is, the outer contour of the first elastic member, the second elastic member and the third elastic member can be a cone.

[0055] As a specific embodiment of the energy absorbing component, Figure 3 The invention shows a specific structural form of the energy absorbing component, wherein the elastic members such as the first elastic member, the second elastic member and the third elastic member are rubber sleeves 100, and the first compression connectors, the second compression connectors and the third compression connectors are threaded sleeves 101, one end of the threaded sleeve 101 is formed with a flange protruding inwardly along the circumferential direction, and the other end thereof is formed with an internal thread, the outer contour of the rubber sleeve 100 is conical, and the rubber sleeve 100 is sleeved with the inner surface of the second connecting pipe 103 and the outer surface of the first connecting pipe 102, and the threaded sleeve 101 is sleeved with the second connecting pipe 101. 03's outer surface is sleeved, and the clearance fits, the threaded sleeve 101 is threadedly connected to the outer surface of the first connecting tube 102, and tightening the threaded sleeve 101 can squeeze the rubber sleeve, so that the first connecting tube 102, the rubber sleeve 100 and the second connecting tube 103 are pressed against each other; when the excavator is working, it can not only absorb vibration energy and buffer vibration, but also allow a certain axial movement between the first connecting tube 102 and the second connecting tube 103, effectively reducing the internal stress caused by installation deformation and welding deformation, and reducing the risk of fracture at the weld and connecting bolts. Among them, the first connecting tube 102 can be the first handrail tube 3, and correspondingly, the second connecting tube 103 can be the second handrail tube 4; or, the first connecting tube 102 can be the second handrail tube 4, and correspondingly, the second connecting tube 103 can be the third handrail tube 5; or, the first connecting tube 102 can be the third handrail tube 5, and correspondingly, the second connecting tube 103 can be the fourth handrail tube 6; that is to say, the first energy absorbing component 7, the second energy absorbing component 8, the third energy absorbing component 9 and other energy absorbing components can all adopt Figure 3 The specific structural form shown.

[0056] In order to facilitate a deeper understanding of the technical concept and advantages of the handrail device of the present invention, the following Figures 2 to 4 The relatively preferred features and relatively comprehensive structural forms of the present invention are described.

[0057] like Figures 2 to 4As shown, the handrail device of the present invention is installed on the excavator, the first mounting plate 1 is installed on the oil tank 201 of the excavator, and the second mounting plate 2 is installed on the upper frame 200 of the excavator; one end of the first handrail tube 3 is connected to the first mounting plate 1, and the other end is sleeved with one end of the second handrail tube 4 through the first energy absorbing component 7, the other end of the second handrail tube 4 is sleeved with one end of the third handrail tube 5 through the second energy absorbing component 8, the other end of the third handrail tube 5 is sleeved with one end of the fourth handrail tube 6 through the third energy absorbing component 9, and the other end of the fourth handrail tube 6 is connected to the second mounting plate 2; specifically, the first energy absorbing component 7 includes a rubber sleeve 10 0 and a threaded sleeve 101, one end of the threaded sleeve 101 is formed with a flange protruding inward along the circumferential direction, and the other end thereof is formed with an internal thread, the rubber sleeve 100 is sleeved with the inner surface of the first handrail tube 3, and is sleeved with the outer surface of the second handrail tube 4, the threaded sleeve 101 is sleeved on the second handrail tube 4, and has a clearance fit with the second handrail tube 4, the threaded sleeve 101 is threadedly connected with the outer surface of the first handrail tube 3, and the threaded sleeve 101 is rotated, and the flange on the threaded sleeve 101 can squeeze the rubber sleeve 100, so that the first handrail tube 3, the rubber sleeve 100 and the second handrail tube 4 are in a compressed state with each other; the second energy absorbing component 8 includes a rubber sleeve 100 and a threaded sleeve 101, one end of the threaded sleeve 101 is formed with a flange protruding inward along the circumferential direction, and the other end thereof is formed with an internal thread, the rubber sleeve 100 is sleeved with the inner surface of the second handrail tube 4, and is sleeved with the outer surface of one end of the third handrail tube 5, the threaded sleeve 101 is sleeved on the end of the third handrail tube 5, and has a clearance fit with the third handrail tube 5, the threaded sleeve 101 is threadedly connected with the outer surface of the second handrail tube 4, and the threaded sleeve 101 is rotated, and the flange on the threaded sleeve 101 can squeeze the rubber sleeve 100, so that the second handrail tube 4, the rubber sleeve 100 and the third handrail tube 5 are in a compressed state with each other; the third energy absorbing component 9 includes a rubber sleeve 100 and a threaded sleeve 101. One end of the threaded sleeve 101 is formed with a flange protruding inward along the circumferential direction, and the other end is formed with an internal thread. The rubber sleeve 100 is sleeved with the inner surface of the third handrail tube 5 and with the outer surface of one end of the fourth handrail tube 6. The threaded sleeve 101 is sleeved on the end of the third handrail tube 5 and has a clearance fit with the third handrail tube 5. The threaded sleeve 101 is threadedly connected with the outer surface of the fourth handrail tube 6. When the threaded sleeve 101 is rotated, the flange on the threaded sleeve 101 can squeeze the rubber sleeve 100, so that the third handrail tube 5, the rubber sleeve 100 and the fourth handrail tube 6 are in a compressed state with each other.

[0058] Reference Figure 1 The handrail structure of the prior art is a rigid welded connection. Due to manufacturing errors, it cannot be adjusted during installation, the handrail is difficult to assemble, and there is installation deformation and welding deformation. Internal stress is easily generated at the welds and connecting bolts. The excavator vibrates greatly when working, and the force accumulates, resulting in cracks at the handrail welds and fatigue failure and fracture of the connecting bolts.

[0059] In contrast, it can be seen from the preferred embodiments of the present invention described above that the armrest device of the present invention cleverly adopts a matching structure of an elastic member and a clamping connector. This movable structure can realize axial movement of the armrest device in three directions: front and back, left and right, and up and down. It can reduce assembly errors caused by processing and manufacturing, facilitate installation, and effectively reduce the internal stress caused by installation deformation and welding deformation, reduce the risk of cracking at the handrail weld and breaking of the connecting bolts. Through adjustment in three degrees of freedom, the armrest device can be adapted to the installation of multiple models, has good versatility, and is convenient for unified design. In addition, since the elastic member adopts an elastic structure such as a rubber sleeve 100, a nylon sleeve or a silicone sleeve, it can buffer and absorb vibration when the excavator is working. Moreover, the elastic member is designed as a wedge-shaped structure, which is also convenient for assembly and disassembly.

[0060] The excavator embodiment of the present invention may have the handrail device described in the above embodiment, that is, all the technical solutions of the above embodiment of the handrail device are adopted, and therefore at least all the beneficial effects brought by the technical solutions of the above embodiment of the handrail device are possessed.

[0061] It should be noted that, although the above embodiments are described by taking an excavator as an example, the handrail device of the present invention can also be applied to other engineering machinery, such as loaders, bulldozers, cranes, pump trucks, etc.

[0062] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A handrail device, It is characterized in that It comprises a first mounting plate (1), a second mounting plate (2), a first handrail tube (3) connected to the first mounting plate (1), a second handrail tube (4), a third handrail tube (5) and a fourth handrail tube (6) connected to the second mounting plate (2); The first handrail tube (3) is sleeved with one end of the second handrail tube (4) via a first energy absorbing component (7), and the second handrail tube (4) is capable of moving along the axial direction of the tube end connected to the first handrail tube (3); The other end of the second handrail tube (4) is connected to one end of the third handrail tube (5); the other end of the third handrail tube (5) is sleeved with the fourth handrail tube (6) via a third energy absorbing assembly (9), and the third handrail tube (5) is capable of moving along the axial direction of the tube end connected to the fourth handrail tube (6); The other end of the second handrail tube (4) is sleeved with one end of the third handrail tube (5) via a second energy absorbing assembly (8), and the third handrail tube (5) is capable of moving along the axial direction of the tube end connected to the second handrail tube (4); The axial direction of the tube end of the second handrail tube (4) connected to the first handrail tube (3), the axial direction of the tube end of the third handrail tube (5) connected to the second handrail tube (4), and the axial direction of the tube end of the third handrail tube (5) connected to the fourth handrail tube (6) intersect each other; wherein the axial direction of the tube end of the second handrail tube (4) connected to the first handrail tube (3), the axial direction of the tube end of the third handrail tube (5) connected to the second handrail tube (4), and the axial direction of the tube end of the third handrail tube (5) connected to the fourth handrail tube (6) respectively correspond to the X-axis direction, the Y-axis direction, and the Z-axis direction in the three-dimensional rectangular coordinate system.

2. The handrail device according to claim 1, It is characterized in that The first handrail tube (3) and the fourth handrail tube (6) are both straight tubes, the second handrail tube (4) is a curved tube, and the third handrail tube (5) is a multi-curved tube; the axial direction of the tube end where the second handrail tube (4) is connected to the first handrail tube (3), the axial direction of the tube end where the third handrail tube (5) is connected to the second handrail tube (4), and the axial direction of the tube end where the third handrail tube (5) is connected to the fourth handrail tube (6) are perpendicular to each other.

3. The handrail device according to claim 1, It is characterized in that The first energy absorbing component (7) comprises a first elastic member and a first compression connector, the first elastic member being sleeved with the outer surface of one of the first handrail tube (3) and the second handrail tube (4), and being sleeved with the inner surface of the other, the first handrail tube (3) being connected to the second handrail tube (4) via the first compression connector, so that the first handrail tube (3) and the first elastic member, and the first elastic member and the second handrail tube (4) are respectively interference fit; The third energy absorbing component (9) comprises a third elastic member and a third compression connector. The third elastic member is sleeved with the outer surface of one of the third handrail tube (5) and the fourth handrail tube (6), and is sleeved with the inner surface of the other. The third handrail tube (5) is connected to the fourth handrail tube (6) via the third compression connector, so that the third handrail tube (5) and the third elastic member, as well as the third elastic member and the fourth handrail tube (6) can be interference-fitted.

4. The handrail device according to claim 3, It is characterized in that The second energy absorbing component (8) comprises a second elastic member and a second compression connector, the second elastic member being sleeved with the outer surface of one of the second handrail tube (4) and the third handrail tube (5), and being sleeved with the inner surface of the other, the second handrail tube (4) being connected to the third handrail tube (5) via the second compression connector, so that the second handrail tube (4) and the second elastic member, as well as the second elastic member and the third handrail tube (5) can be interference-fitted respectively.

5. The handrail device according to claim 4, It is characterized in that The outer contours of the first elastic member, the second elastic member and the third elastic member are all conical.

6. The armrest device according to claim 5, It is characterized in that The first elastic member, the second elastic member and the third elastic member are one of a rubber sleeve (100), a nylon sleeve or a silicone sleeve.

7. The armrest device according to claim 6, It is characterized in that The first compression connector, the second compression connector and the third compression connector are all threaded sleeves (101), one end of the threaded sleeve (101) is formed with a flange protruding inwardly in the circumferential direction, and the other end thereof is formed with an internal thread.

8. An excavator, It is characterized in that Comprising an armrest device according to any one of claims 1 to 7.

9. The excavator according to claim 8, It is characterized in that The first mounting plate (1) is connected to the oil tank (201) of the excavator, and the second mounting plate (2) is connected to the upper frame (200) of the excavator.

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