Handrail assembly and excavator

Abstract

The present invention provides an armrest assembly and an excavator, relating to the technical field of engineering machinery. The armrest assembly comprises a first rod, an intermediate rod, and a second rod; the first rod, the intermediate rod, and the second rod are hingedly connected in sequence; the first rod and the intermediate rod are hingedly connected to form a first hinge; the free end of the second rod is slidably connected to a rod seat; the first hinge and the free end of the second rod are capable of synchronous movement under the action of an external force, and the directions of movement of the two rods are arranged at an angle; the excavator includes the armrest assembly. This armrest assembly solves the technical problem in the prior art of excavator armrests, which are prone to breakage and damage due to vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to an armrest assembly and an excavator. Background Art

[0002] An excavator, also known as an excavating machine or backhoe, is an earth-moving machine that uses its bucket to dig materials above or below the surface and load them onto transport vehicles or unload them into a stockpile. Excavators primarily dig materials such as soil, coal, silt, and pre-loosened soil and rock. In recent years, the development of construction machinery has been relatively rapid, and excavators have become one of the most important types of construction machinery.

[0003] In existing excavators, the handrail is generally made of a whole section of steel pipe that is bent, and its two ends are respectively installed on the top of the fuel tank and the bottom of the chassis.

[0004] However, this installation method keeps the handrail in a taut state at all times. The vibration generated during the operation of the excavator drives the taut handrail to vibrate, which can easily cause the connection between the two ends of the handrail or the middle of the handrail to break, causing damage to the handrail. Summary of the Invention

[0005] The object of the present invention is to provide an armrest assembly to alleviate the technical problem in the prior art that the excavator armrest is prone to breakage and damage under vibration.

[0006] In a first aspect, an embodiment provides an armrest assembly, comprising: a first rod, an intermediate rod, and a second rod.

[0007] The first rod, the intermediate rod and the second rod are hinged in sequence; wherein, the first rod and the intermediate rod are hinged to form a first hinge; the free end of the second rod is slidably connected to a rod seat; the first hinge and the free end of the second rod can move synchronously under the action of external force, and the movement directions of the two are set at an angle.

[0008] The free end of the first rod and the rod seat are both used to connect with the object to be installed.

[0009] Furthermore, the first hinge point can slide relative to the first rod; and the sliding direction of the first hinge point is perpendicular to the sliding direction of the second rod.

[0010] Furthermore, the first rod and the intermediate rod are hinged via a first hinge shaft; and the hinged end of the first rod is provided with a sliding groove for sliding of the first hinge shaft.

[0011] Furthermore, an elastic member is provided on the rod seat, the elastic member is connected to the second rod member, and the elastic deformation direction of the elastic member is the same as the sliding direction of the second rod member.

[0012] The elastic member can position the first hinge shaft in the middle of the sliding groove in a natural state.

[0013] Furthermore, a first limiting structure is provided on the rod seat, and the first limiting structure is used to enable the second rod to compress the elastic member and be fixed relative to the rod seat.

[0014] Furthermore, the rod seat includes an accommodating space with an opening, and the free end of the second rod is located in the accommodating space from the opening.

[0015] One end of the elastic member is connected to the free end of the second rod, and the other end is connected to the inner wall of the accommodating space. The free end of the second rod can move in the accommodating space under the mutual compression between itself and the elastic member.

[0016] Furthermore, the first limiting structure includes a limiting pin and a pin hole provided on the rod seat, and the limiting pin can be connected to the free end of the second rod through the pin hole, so that the free end of the second rod presses the elastic member.

[0017] Furthermore, both sides of the slide groove perpendicular to its extension direction are open; the end where the intermediate rod is hinged to the first rod is set as a "U"-shaped opening, the slide groove is inserted into the "U"-shaped opening, and is fixed by the first hinge shaft.

[0018] Furthermore, both ends of the first hinge shaft protruding from the "U"-shaped opening are provided with a second limiting structure, and the second limiting structure is used to prevent the first hinge shaft from escaping from the "U"-shaped opening or the sliding groove.

[0019] Beneficial effects:

[0020] The armrest assembly provided by the present invention has a first rod and an intermediate rod hingedly configured to form a first hinge point, and a free end of the second rod is slidably connected to a rod seat. Since the first hinge point and the free end of the second rod can both move synchronously under the action of an external force (such as mechanical vibration force), and the movement directions of the two are set at an angle, the connection between the first rod and the intermediate rod is a movable connection, and the first hinge point can move relative to each other, thereby being able to offset a part of the vibration force. At the same time, the second rod can move relative to the rod seat, and the connection between the two is also a movable connection, which can also offset a part of the vibration force. Therefore, the armrest assembly can offset vibration forces from multiple directions, so that the vibration force will not generate stress on the first rod, the intermediate rod and the second rod. Compared with the hard connection in the prior art, the armrest assembly can avoid the armrest assembly from breaking under the vibration force and extend its service life.

[0021] In a second aspect, an embodiment provides an excavator, comprising: a fuel tank, a chassis, and the aforementioned armrest assembly.

[0022] The free end of the first rod is connected to the oil tank.

[0023] The rod seat is connected to the chassis.

[0024] Beneficial effects:

[0025] The excavator provided by the present invention includes the aforementioned handrail assembly. Therefore, the technical advantages and effects achieved by the excavator also include the technical advantages and effects achieved by the handrail assembly, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of an armrest assembly provided in an embodiment of the present invention;

[0028] Figure 2 A front view of an armrest assembly provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram showing the internal structure of an armrest assembly provided in an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the connection structure of the armrest assembly, fuel tank and chassis provided in an embodiment of the present invention.

[0031] icon:

[0032] 10-handrail assembly; 20-fuel tank; 30-chassis;

[0033] 100-first rod; 110-slide;

[0034] 200-intermediate rod;

[0035] 300-second rod;

[0036] 410-rod seat; 420-elastic member; 430-limiting pin;

[0037] 510 - first hinge shaft; 520 - disc-shaped limiting member. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] In addition, terms such as "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", not that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0045] Example

[0046] This embodiment provides an armrest assembly 10, such as Figure 1 or Figure 2 As shown, the armrest assembly 10 includes a first rod 100, an intermediate rod 200 and a second rod 300; the first rod 100, the intermediate rod 200 and the second rod 300 are hinged in sequence; wherein, the first rod 100 and the intermediate rod 200 are hingedly configured to form a first hinge; the free end of the second rod 300 is slidably connected to a rod seat 410; the first hinge and the free end of the second rod 300 move synchronously under the action of an external force, and the movement directions of the two are set at an angle; the free end of the first rod 100 and the rod seat 410 are both used to connect to the body to be installed.

[0047] The armrest assembly 10 provided in this embodiment has a first rod 100 and an intermediate rod 200 hingedly configured to form a first hinge point, and a free end of the second rod 300 is slidably connected to a rod seat 410. Since the first hinge point and the free end of the second rod 300 can both move synchronously under the action of an external force (such as excavator vibration), and the movement directions of the two are set at an angle, the connection between the first rod 100 and the intermediate rod 200 is a movable connection, and the first hinge point can move relative to each other, thereby offsetting part of the vibration force. At the same time, the second rod 300 can slide relative to the rod seat 410, and the connection between the two is also a movable connection, which can also offset part of the vibration force. Therefore, the armrest assembly 10 can offset vibration forces from multiple directions, so that the vibration force will not generate stress on the first rod 100, the intermediate rod 200 and the second rod 300. Compared with the hard connection in the prior art, the armrest assembly can prevent the armrest assembly 10 from breaking under vibration force and extend its service life.

[0048] The first rod 100 , the middle rod 200 and the second rod 300 may all be made of steel pipes, which may be round pipes or square pipes.

[0049] The first rod 100 , the middle rod 200 and the second rod 300 may be arranged in a variety of non-collinear configurations. Of course, any configuration that meets the requirements is within the scope of protection of the present invention.

[0050] In this embodiment, due to the different configurations of the first rod 100, the intermediate rod 200, and the second rod 300, when the free end of the first rod 100 is fixedly connected to the object to be installed, the motion trajectory of the first hinge point can be an arcuate trajectory or a horizontal straight trajectory. When the free end of the first rod 100 is hinged to the object to be installed, the motion trajectory of the first hinge point can also be an arcuate trajectory. In this embodiment, the motion trajectory of the first hinge point is a horizontal straight trajectory. The motion trajectory of the second rod 300 is a vertical straight trajectory.

[0051] In this embodiment, refer to Figure 2 To facilitate manual operation by the operator and simplify the overall structure of the handrail assembly 10, the first rod 100 can be configured by a bent steel pipe, including a horizontal section and a vertical section, the second rod 300 can be configured by a straight steel pipe and arranged vertically, and the intermediate rod 200 can be configured by a straight steel pipe and connected between the horizontal section of the first rod 100 and the second rod 300. After installation, the intermediate rod 200 can be arranged at an angle.

[0052] Furthermore, in this embodiment, the first hinge is capable of sliding relative to the first rod 100; the sliding direction of the first hinge is perpendicular to the sliding direction of the second rod 300. Under the action of vibration, this arrangement enables the first hinge to slide in the first direction while simultaneously causing the second rod 300 to slide in a second direction perpendicular to the first direction, thereby partially or completely offsetting the vibration forces in the first and second directions.

[0053] It should be noted that the “first direction and the second direction” mentioned above can be defined as multiple directions according to different installation angles of the armrest assembly 10 .

[0054] Optional, see Figure 2 In this embodiment, the first direction may be a horizontal direction, and the second direction may be a vertical direction.

[0055] Please continue to refer to Figure 2 Furthermore, the first rod 100 and the intermediate rod 200 are hingedly connected via a first hinge 510. A sliding groove 110 is provided at the hinged end of the first rod 100 for sliding movement of the first hinge 510. The sliding groove 110 guides the movement of the first hinge 510, allowing the first hinge 510 to slide along the path of the sliding groove 110 during movement.

[0056] Optionally, the sliding groove 110 may be directly provided on the first rod 100 ; or, a connecting block may be welded on the first rod 100 , and the sliding groove 110 may be provided on the connecting block. The specific selection may be made according to needs.

[0057] The sliding groove 110 in this embodiment extends in the horizontal direction, so that the first hinge point can slide left and right in the horizontal direction, and at the same time, the second rod 300 can slide up and down in the vertical direction.

[0058] Furthermore, an elastic member 420 is provided on the rod seat 410, and the elastic member 420 is connected to the second rod member 300. The elastic deformation direction of the elastic member 420 is the same as the sliding direction of the second rod member 300; the elastic member 420 can make the first hinge shaft 510 located in the middle position of the slide groove 110 in a natural state.

[0059] Specifically, since the elastic member 420 is connected to the second rod member 300, under the action of the vibration force, the elastic member 420 will push the second rod member 300 to move up and down, thereby pushing the middle rod member 200 to move, and then causing the first hinge to slide left and right to buffer the vibration force of the armrest assembly in the horizontal and vertical directions.

[0060] In the natural state, the elastic member 420 sets the first hinge shaft 510 in the middle position of the slide groove 110 to ensure that the first hinge shaft 510 can slide left or right along the slide groove 110 under the action of vibration force or the pushing force of the second rod 300, that is, to provide sufficient space for the sliding of the first hinge shaft 510.

[0061] Optionally, the elastic member may be a spring or other elastic structural member with elastic deformation.

[0062] In some embodiments, reference Figure 3 The rod seat 410 includes an accommodating space with an opening, and the free end of the second rod 300 is limited in the accommodating space from the opening; one end of the elastic member 420 is connected to the free end of the second rod 300, and the other end is connected to the inner wall of the accommodating space. The free end of the second rod 300 can move in the accommodating space under the mutual compression between itself and the elastic member 420.

[0063] The rod seat 410 may be a cylindrical structure with an opening, and the portion of the second rod 300 placed in the accommodating space may be stepped, wherein the size of the step is larger than the size of the opening to ensure that the second rod 300 will not detach from the opening of the rod seat 410 .

[0064] Optionally, one end of the elastic member 420 abuts against the free end of the second rod 300, and the other end abuts against the inner wall of the accommodating space; or, one end of the elastic member 420 abuts against the free end of the second rod 300, and the other end is fixedly connected to the inner wall of the accommodating space.

[0065] Based on the above embodiment, a first limiting structure is provided on the rod seat 410, which is used to compress the elastic member 420 by the second rod member 300 and fix it relative to the rod seat 410. This situation is suitable for operators to use handrails for climbing operations.

[0066] Further, refer to Figure 2 The first limiting structure includes a limiting pin 430 and a pin hole provided on the rod base 410. The limiting pin 430 can be connected to the free end of the second rod 300 through the pin hole, so that the free end of the second rod 300 presses the elastic member 420. In this case, the elastic member 420 is in a compressed state, and the second rod 300 is fixed relative to the rod base 410.

[0067] In some embodiments, the portion of the second rod 300 placed in the accommodating space (or the stepped structure) is provided with a groove for inserting the limit pin 430, and the limit pin 430 can be inserted into the groove of the second rod 300 from the pin hole, wherein the pin hole can be a smooth hole or a threaded hole; or, one end of the limit pin 430 is tightly abutted against the outer wall of the second rod 300, wherein the pin hole is a threaded hole, and the limit pin 430 is provided with a thread that cooperates with the threaded hole.

[0068] Based on the above embodiments, Figure 1 and Figure 2 , both sides of the slide groove 110 perpendicular to its extension direction are open; the end where the intermediate rod 200 is hinged to the first rod 100 is set to a "U"-shaped opening, wherein the slide groove 110 is inserted into the "U"-shaped opening and is connected and fixed by the first hinge shaft 510.

[0069] Optionally, a “U”-shaped member may be provided at the end where the intermediate rod 200 and the first rod 100 are hinged, wherein the “U”-shaped member may be welded to the end where the intermediate rod 200 and the first rod 100 are hinged.

[0070] Further, refer to Figure 1 The two ends of the first hinge shaft 510 protruding from the "U"-shaped opening are both provided with a second limiting structure, and the second limiting structure is used to prevent the first hinge shaft 510 from escaping from the "U"-shaped opening or the sliding groove 110.

[0071] In some embodiments, the limiting structure is a disc-shaped limiting member 520 , and the diameter of the disc-shaped limiting member 520 is larger than the groove width of the sliding groove 110 to ensure that the first hinge shaft 510 will not disengage.

[0072] The length of the first hinge shaft 510 is preferably such that the first hinge shaft 510 has a certain movable space in the horizontal front-to-back direction, that is, a small movable gap is left between the outer side surface of the “U”-shaped opening and the corresponding disc-shaped limiting member 520 .

[0073] In this embodiment, rubber pads may be provided at locations prone to friction, such as on the inner wall of the slide groove 110 , or on the inner wall of the rod seat 410 .

[0074] In summary, when the handrail assembly is not needed for climbing operations, the limit pin 430 is removed and the elastic member 420 slowly returns to its natural extension state. During this process, the elastic member 420 pushes the second rod 300 upward, and the left end of the intermediate rod 200 is located in the middle position of the slide groove 110 through the second rod 300 (that is, the first hinge shaft 510 is located in the middle position); at this time, the vibration generated by the operation of the excavator will immediately exert a force on the first rod 100, the intermediate rod 200 and the second rod 300, but since the connection between the first rod 100 and the intermediate rod 200 is a movable connection, the vibration force in the horizontal left and right directions will be offset by the sliding of the first hinge shaft 510 in the slide groove 110, and the vibration in the horizontal front and rear directions will be offset by the sliding of the slide groove 110 along the first hinge shaft 510; at the same time, the vibration in the vertical direction will be offset by the sliding of the second rod 300 up and down along the rod seat 410, thereby avoiding the handrail assembly from breaking during long-term vibration of the excavator.

[0075] When climbing operations need to be performed with the help of the handrail assembly, the limit pin 430 is inserted into the pin hole of the rod seat 410, the second rod 300 is held by hand, and the second rod 300 is pressed downward until the limit pin 430 can be inserted from the pin hole into the groove of the second rod 300, so that the second rod 300 and the rod seat 410 are relatively fixed. At this time, the various connections of the handrail assembly will not move, thereby meeting the operator's climbing needs.

[0076] This embodiment also provides an excavator, which includes a fuel tank 20, a chassis 30 and the aforementioned armrest assembly 10; Figure 4 The free end of the first rod 100 is connected to the fuel tank 20 ; the rod base 410 is connected to the chassis 30 .

[0077] Optionally, the end of the first rod 100 away from the middle rod 200 can be connected to the fuel tank 20 directly or through a mounting plate, such as by welding or screws; the rod seat 410 can be welded or connected to the chassis 30 by screws.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An armrest assembly, characterized in that: include: a first rod, an intermediate rod, and a second rod; The first rod, the intermediate rod, and the second rod are hinged in sequence; wherein the first rod and the intermediate rod are hinged to form a first hinge; the free end of the second rod is slidably connected to a rod seat; the first hinge and the free end of the second rod are capable of synchronous movement under the action of an external force, and the movement directions of the two are set at an angle; The free end of the first rod and the rod seat are both used to connect to the body to be installed; the first hinge point can slide relative to the first rod; the sliding direction of the first hinge point is perpendicular to the sliding direction of the second rod; The first rod and the intermediate rod are hingedly connected via a first hinge shaft; a sliding groove is provided at the hinged end of the first rod for sliding the first hinge shaft; an elastic member is provided on the rod seat, the elastic member is connected to the second rod, and the elastic deformation direction of the elastic member is the same as the sliding direction of the second rod; the elastic member can, in a natural state, position the first hinge shaft in the middle of the sliding groove; The rod seat is provided with a first limiting structure, which is used to make the second rod compress the elastic member and fix it relative to the rod seat; the first limiting structure includes a limiting pin and a pin hole provided on the rod seat, and the limiting pin can be connected to the free end of the second rod through the pin hole, so that the free end of the second rod presses the elastic member.

2. The armrest assembly according to claim 1, wherein: The rod seat includes an accommodating space with an opening, and the free end of the second rod is limited to the accommodating space from the opening; One end of the elastic member is connected to the free end of the second rod, and the other end is connected to the inner wall of the accommodating space. The free end of the second rod can move in the accommodating space under the mutual compression between itself and the elastic member.

3. The armrest assembly according to claim 1, wherein: Both sides of the chute perpendicular to its extension direction are open; The end portion where the intermediate rod is hinged to the first rod is configured as a U-shaped opening, the sliding groove is inserted into the U-shaped opening, and is connected and fixed via the first hinge shaft.

4. The armrest assembly according to claim 3, characterized in that The two shaft ends of the first hinge shaft protruding from the "U"-shaped opening are both provided with a second limiting structure, and the second limiting structure is used to prevent the first hinge shaft from escaping from the "U"-shaped opening or the sliding groove.

5. An excavator, characterized in that: include: A fuel tank, a chassis, and an armrest assembly according to any one of claims 1 to 4; The free end of the first rod is connected to the oil tank; The rod seat is connected to the chassis.

Images