Floating rocker arm structure capable of reducing arrangement space

Abstract

The utility model discloses a floating rocker arm structure capable of reducing arrangement space, which relates to the technical field of engineering machinery and comprises an underframe body, a connecting rod, supporting legs and a wheel mechanism, a floating multi-way valve is arranged on the underframe body, and a first mounting shaft is arranged on the underframe body; the middle of the connecting rod is hinged to the first mounting shaft. The connecting rod is hinged to a valve rod assembly on the floating multi-way valve. The middle of the supporting leg is rotationally connected with the underframe body through a connecting shaft, the two ends of the supporting leg are fixedly connected with the underframe body through floating oil cylinders, a second mounting shaft is arranged on the supporting leg, and the end, away from the valve rod assembly, of the connecting rod is hinged to the second mounting shaft. The distance between the hinged position of the connecting rod and the valve rod assembly and the first installation shaft is larger than the distance between the first installation shaft and the second installation shaft, and the floating multi-way valve controls the floating oil cylinder to execute corresponding actions according to movement of the valve rod assembly. The wheel mechanism comprises a left wheel set and a right wheel set which are connected with the two ends of the supporting legs respectively. According to the floating multi-way valve, the arrangement space required by the floating multi-way valve can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a floating rocker arm structure that reduces the layout space. Background Technology

[0002] Aerial work platforms are widely used in shipbuilding, construction, municipal engineering, power, telecommunications, landscaping, advertising, stadiums, airports, ports, and various large industrial and mining enterprises, capable of performing high-altitude operations, equipment installation, and maintenance. The existing boom-type aerial work platform's active floating chassis structure includes: a chassis body, front outriggers, rear outriggers, a front wheel mechanism, a rear wheel mechanism, and a steering mechanism. The chassis body is equipped with a floating multi-way valve, and the front outriggers are rotatably connected to the chassis body via a first connecting shaft and a floating cylinder. The rear outriggers are rotatably connected to the chassis body via a second connecting shaft. The floating multi-way valve is mounted on the chassis, and the rear outriggers have a hinge point directly connected to the valve stem of the floating multi-way valve. By setting up the matching floating multi-way valve, valve stem, and floating cylinder, the chassis body's leveling function is achieved. To achieve a 1:1 ratio between the valve core's vertical stroke and the base frame's sway vertical stroke in the existing solution, a large amount of space is required inside the base frame to accommodate the floating multi-way valve. For small aerial work platforms with a relatively narrow base frame, arranging the floating multi-way valve is quite difficult. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a floating rocker arm structure that reduces the arrangement space required for a floating multi-way valve.

[0004] A floating rocker arm structure with reduced layout space according to a first aspect embodiment of the present invention includes: a base frame body, a connecting rod, a support leg, and a wheel mechanism. A floating multi-way valve is provided on the base frame body, and a first mounting shaft is provided on the base frame body. The middle portion of the connecting rod is hinged to the first mounting shaft, and the connecting rod is hinged to a valve stem assembly on the floating multi-way valve. The middle portion of the support leg is rotatably connected to the base frame body via a connecting shaft, and both ends of the support leg are fixedly connected to the base frame body via floating hydraulic cylinders. A second mounting shaft is provided on the support leg. The end of the connecting rod away from the valve stem assembly is hinged to the second mounting shaft. The distance from the hinge point of the connecting rod to the valve stem assembly to the first mounting shaft is greater than the length between the first and second mounting shafts. The floating multi-way valve controls the floating hydraulic cylinders to perform corresponding actions based on the movement of the valve stem assembly. The wheel mechanism includes a left wheel assembly and a right wheel assembly respectively connected to both ends of the support leg.

[0005] According to an embodiment of the present invention, a floating rocker arm structure with reduced layout space has at least the following beneficial effects: When the aerial work platform vehicle moves forward, if the left wheel falls into a ditch, the valve stem assembly will extend, and the floating cylinder on the left side will receive oil; if the left wheel encounters a protrusion, the valve stem assembly will be compressed, and the floating cylinder on the right side will receive oil. This achieves automatic leveling of the aerial work platform vehicle's chassis. By setting a connecting rod, which acts as a lever, the swing stroke of the outriggers is amplified, allowing the floating cylinder and valve stem assembly to be arranged closer to the connecting shaft, thus reducing the horizontal space required for their arrangement.

[0006] According to some embodiments of the present invention, the outrigger includes a front outrigger and a rear outrigger, the connecting shaft includes a front connecting shaft and a rear connecting shaft, the front outrigger is rotatably connected to the base frame body through the front connecting shaft, the rear outrigger is rotatably connected to the base frame body through the rear connecting shaft, the floating hydraulic cylinder is used to control the rotation angle between the front outrigger and the base frame body, and the second mounting shaft is disposed on the rear outrigger.

[0007] According to some embodiments of the present invention, a first pad is connected to the base body, and a second pad is provided on the support leg corresponding to the first pad. An adjustment pad is detachably connected between the first pad and the second pad.

[0008] According to some embodiments of the present invention, the second pad is connected to the adjusting pad by bolts.

[0009] According to some embodiments of the present invention, a reinforcing plate is also provided between the upper end of the first pad and the base frame body.

[0010] According to some embodiments of the present invention, the valve stem assembly includes a relay rod and a valve core, the valve core is disposed in the floating multi-way valve, one end of the relay rod is hinged to the valve core, and the other end is hinged to the connecting rod.

[0011] According to some embodiments of this utility model, the relay rod is telescopic to adjust its length.

[0012] According to some embodiments of the present invention, the relay rod includes a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are connected by a screw thread.

[0013] According to some embodiments of this utility model, the screw is threaded with multiple locking nuts.

[0014] According to some embodiments of the present invention, a mounting block is detachably connected to the support leg, and the second mounting shaft is disposed on the mounting block.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the installation structure of one embodiment of the present utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0020] Figure 4 This is a schematic diagram of the right wheel assembly after being lifted in one embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the left wheel assembly after being lifted in one embodiment of the present invention;

[0022] Figure 6 This is a top view of the overall structure of one embodiment of the present invention.

[0023] Icon labels:

[0024] The base frame body 100, connecting shaft 110, front connecting shaft 111, rear connecting shaft 112, first pad 120, adjusting pad 130, and reinforcing plate 140 are all included.

[0025] Floating multi-way valve 200;

[0026] First mounting shaft 300;

[0027] Linkage 400;

[0028] Valve stem assembly 500, relay rod 510, first connecting rod 511, second connecting rod 512, screw 513, locking nut 514, valve core 520;

[0029] Outrigger 600, mounting block 601, front outrigger 602, rear outrigger 603, floating cylinder 610, second mounting shaft 620, second pad 630;

[0030] Wheel mechanism 700, left wheel assembly 710, right wheel assembly 720. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Reference Figures 1 to 6As shown, an embodiment of the present invention provides a floating rocker arm structure with reduced layout space, comprising: a base frame body 100, a connecting rod 400, outriggers 600, and a wheel mechanism 700. A floating multi-way valve 200 is bolted to the base frame body 100. The floating multi-way valve 200 is a valve controlling hydraulic pressure in a hydraulic system, and its specific structure is prior art, so it will not be described in detail. The base frame body 100 is provided with a first mounting shaft 300, which is located away from the center line of the base frame body 100. The middle part of the connecting rod 400 is hinged to the first mounting shaft 300, and the first mounting shaft 300 passes through the middle part of the connecting rod 400. The connecting rod 400 is hinged to the valve stem assembly 500 on the floating multi-way valve 200. The middle part of the outrigger 600 is rotatably connected to the middle part of the base frame body 100 through a connecting shaft 110. Both ends of the outrigger 600 are fixedly connected to the base frame body 100 through floating cylinders 610. The floating multi-way valve 200 and the floating cylinders 610 are prior art and have been disclosed in Chinese invention patent publication number CN112551453A, so they will not be described in detail here. When the floating cylinders 610 at both ends of the outrigger 600 extend or retract, they can control the rotation of the base frame body 100 around the connecting shaft 110. The outrigger 600 is equipped with a second mounting shaft 620, which extends parallel to the first mounting shaft 300. A strip-shaped hole is provided at the end of the connecting rod 400 away from the valve stem assembly 500. The connecting rod 400 is hinged to the second mounting shaft 620 through the strip-shaped hole, and the extension direction of the strip-shaped hole is the same as that of the connecting rod 400. When the connecting rod 400 rotates, the second mounting shaft 620 moves along the strip-shaped hole, allowing the connecting rod 400 to rotate normally. The floating multi-way valve 200 is connected to the valve stem assembly 500. The floating multi-way valve 200 controls the floating cylinder 610 to perform corresponding actions based on the movement of the valve stem assembly 500. The distance from the hinge point of the connecting rod 400 to the first mounting shaft 300 is greater than the distance between the first mounting shaft 300 and the second mounting shaft 620. The connecting rod 400 amplifies the swing of the outrigger 600, making the stroke of the valve stem assembly 500 greater than the swing stroke of the outrigger 600. The wheel mechanism 700 includes a left wheel assembly 710 and a right wheel assembly 720, respectively connected to both ends of the outrigger 600. When the left wheel assembly 710 and the right wheel assembly 720 are at different heights, the outrigger 600 swings. This swinging of the outrigger 600 drives the connecting rod 400 to rotate. The rotation of the connecting rod 400 drives the valve stem assembly 500, subjecting it to axial tension and compression. The floating multi-way valve 200 controls the flow rate of the corresponding floating cylinder 610 according to the extension and retraction of the valve stem assembly 500, thus leveling the aerial work platform's underframe 100. For example, when the aerial work platform moves forward, if the left wheel falls into a ditch, the valve stem assembly 500 will extend, and the floating cylinder 610 on the left will receive oil; if the left wheel encounters a protrusion, the valve stem assembly 500 will be compressed, and the floating cylinder 610 on the right will receive oil. This achieves automatic leveling of the aerial work platform's underframe 100.Due to the required adjustment precision, the valve stem assembly 500 needs a certain stroke to control the floating multi-way valve 200. While the outrigger 600 swings at a relatively small angle, its stroke increases with distance from the connecting shaft 110, even with the same swing angle. Therefore, existing technology arranges the floating cylinder 610 and valve stem assembly 500 at a distance from the connecting shaft 110 to meet the stroke adjustment requirements of the valve stem assembly 500. However, in miniaturized vehicles, there is insufficient space for the floating cylinder 610 and valve stem assembly 500. Therefore, by using a connecting rod 400, which acts as a lever, the stroke of the outrigger 600 is amplified. This allows the floating cylinder 610 and valve stem assembly 500 to be positioned closer to the connecting shaft 110, reducing the horizontal space required for their placement.

[0036] Reference Figure 6 As shown, it can be understood that the outrigger 600 includes a front outrigger 602 and a rear outrigger 603, and the connecting shaft 110 includes a front connecting shaft 111 and a rear connecting shaft 112. The front outrigger 602 is rotatably connected to the base frame body 100 through the front connecting shaft 111, and the rear outrigger 603 is rotatably connected to the base frame body 100 through the rear connecting shaft 112. The floating cylinder 610 is used to control the rotation angle between the front outrigger 602 and the base frame body 100. The second mounting shaft 620 is disposed on the rear outrigger 603. The left wheel assembly 710 includes a left front wheel and a left rear wheel, and the right wheel assembly 720 includes a right front wheel and a right rear wheel. The left front wheel and the right front wheel are rotatably mounted on the left and right sides of the front outrigger 602, respectively, and the left rear wheel and the right rear wheel are rotatably mounted on the left and right sides of the rear outrigger 603, respectively.

[0037] Reference Figure 1 As shown, it can be understood that the connecting shaft 110 is horizontally positioned, and the extension direction of the connecting shaft 110 is perpendicular to the extension direction of the outrigger 600. This helps to improve the stability of the vehicle during driving.

[0038] Reference Figure 1 and Figure 3As shown, it can be understood that a first pad 120 is welded onto the base frame body 100, and the first pad 120 is horizontally positioned. A second pad 630 is positioned on the support leg 600 corresponding to the first pad 120, and an adjusting pad 130 is detachably connected between the first pad 120 and the second pad 630. The support leg 600 can rotate until the first pad 120 and the second pad 630 clamp the adjusting pad 130. The adjusting pad 130 is made of rubber and serves as a buffer and barrier, limiting the rotation angle of the support leg 600 and preventing excessive rotation. It is foreseeable that two sets of the first pad 120, the second pad 630, and the adjusting pad 130 are symmetrically arranged to limit the clockwise and counterclockwise rotation angles of the support leg 600, respectively. By changing the thickness of the adjusting pad 130, the gap between the base frame body 100 and the support leg 600 is adjusted, thereby changing the maximum rotation angle of the support leg 600.

[0039] Reference Figures 1 to 3 As shown, it is understandable that the second pad 630 is connected to the adjusting pad 130 by bolts. After long-term use, the adjusting pad 130 will fatigue and age, and its elasticity will no longer meet the requirements for continued use. Therefore, the adjusting pad 130 needs to be disassembled and replaced periodically. The bolt connection has the advantage of convenient replacement.

[0040] Reference Figures 1 to 3 As shown, it can be understood that a reinforcing plate 140 is also provided between the upper end of the first pad 120 and the base frame body 100. This is to strengthen the connection between the first pad 120 and the base frame body 100 and increase structural stability.

[0041] Reference Figures 1 to 3 As shown, the valve stem assembly 500 includes a relay rod 510 and a valve core 520. The valve core 520 passes through the floating multi-way valve 200 and is used to control the opening and closing of the floating multi-way valve 200. One end of the relay rod 510 is hinged to the valve core 520, and the other end is hinged to the connecting rod 400. The hinged ends of the relay rod 510 convert the rotational motion of the connecting rod 400 into the linear motion of the valve core 520.

[0042] Reference Figures 1 to 5 As shown, it is understandable that the relay rod 510 can extend and retract to adjust its length. Because the floating multi-way valve 200 requires high control precision, but the relative positions of the support leg 600, base frame 100, second mounting shaft 620, and floating multi-way valve 200 cannot usually be perfectly precise, the length of the relay rod 510 needs to be precisely adjusted after assembly so that the stroke of the valve core 520 is exactly within the range required for control by the floating multi-way valve 200. This reduces the installation precision requirements and saves production costs.

[0043] Reference Figures 1 to 3As shown, the relay rod 510 includes a first connecting rod 511 and a second connecting rod 512. The first connecting rod 511 is hinged to the valve core 520, and the second connecting rod 512 is hinged to the connecting rod 400. The first connecting rod 511 and the second connecting rod 512 are threaded together by a screw 513. Both the first connecting rod 511 and the second connecting rod 512 have threaded holes for the screw 513 to connect to at their respective ends. By changing the depth to which the screw 513 rotates into the threaded hole, the distance between the first connecting rod 511 and the second connecting rod 512 is changed, thus adjusting the length of the relay rod 510 itself.

[0044] Reference Figures 1 to 3 As shown, it can be understood that multiple locking nuts 514 are threaded onto the screw 513. The locking nuts 514 abut against the first connecting rod 511 and the second connecting rod 512, preventing the screw 513 from rotating due to equipment vibration during operation. When it is necessary to change the distance between the first connecting rod 511 and the second connecting rod 512, the locking nuts 514 are rotated until they disengage from the first connecting rod 511 and the second connecting rod 512, allowing the screw 513 to rotate.

[0045] Reference Figures 1 to 3 As shown, it can be understood that the support leg 600 is bolted to the mounting block 601, and the second mounting shaft 620 is welded to the mounting block 601. Since the second mounting shaft 620 is prone to wear under long-term use, a detachable structure is adopted to improve the maintainability of the second mounting shaft 620 and facilitate replacement.

[0046] Working principle: When the aerial work platform vehicle moves forward, if the left wheel assembly 710 falls into a pit, the connecting rod 400 rotates, causing the valve stem assembly 500 to extend, and the floating multi-way valve 200 controls the oil intake of the left floating cylinder 610. When the left wheel assembly 710 encounters a protrusion, the connecting rod 400 rotates, causing the valve stem assembly 500 to compress, and the floating multi-way valve 200 controls the oil intake of the right floating cylinder 610. This achieves automatic leveling of the aerial work platform vehicle's underframe body 100. By setting the connecting rod 400, which acts as a lever, the swing stroke of the outrigger 600 is amplified. This allows the floating cylinder 610 and valve stem assembly 500 to be positioned close to the connecting shaft 110, reducing the horizontal space required for their placement.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A floating rocker structure which reduces the arrangement space, characterized by, The application relates to a floating multi-way valve mechanism, which comprises a chassis body (100) provided with a floating multi-way valve (200), wherein the chassis body (100) is provided with a first mounting shaft (300); a connecting rod (400) is hingedly connected with the first mounting shaft (300) at the middle part of the connecting rod (400) and is hingedly connected with a valve rod assembly (500) on the floating multi-way valve (200); a support leg (600) is rotatably connected with the chassis body (100) through a connecting shaft (110) at the middle part of the support leg (600), the two ends of the support leg (600) are fixedly connected with the chassis body (100) through floating oil cylinders (610), a second mounting shaft (620) is arranged on the support leg (600), one end of the connecting rod (400) away from the valve rod assembly (500) is hingedly connected with the second mounting shaft (620), the distance between the hingedly connected position of the connecting rod (400) and the valve rod assembly (500) and the first mounting shaft (300) is greater than the distance between the first mounting shaft (300) and the second mounting shaft (620), and the floating multi-way valve (200) controls the floating oil cylinders (610) to perform corresponding actions according to the movement of the valve rod assembly (500); and a wheel mechanism (700) comprising a left wheel group (710) and a right wheel group (720) connected with the two ends of the support leg (600) respectively. The support leg (600) comprises a front support leg (602) and a rear support leg (603), the connecting shaft (110) comprises a front connecting shaft (111) and a rear connecting shaft (112), the front support leg (602) is rotatably connected with the chassis body (100) through the front connecting shaft (111), the rear support leg (603) is rotatably connected with the chassis body (100) through the rear connecting shaft (112), the floating oil cylinders (610) are used for controlling the rotation angle of the front support leg (602) relative to the chassis body (100), and the second mounting shaft (620) is arranged on the rear support leg (603). A first pad (120) is connected with the chassis body (100), a second pad (630) is arranged on the support leg (600) corresponding to the first pad (120), and an adjusting pad (130) is detachably connected between the first pad (120) and the second pad (630).

2. The compacted floating rocker structure of claim 1, wherein: The second pad (630) is connected with the adjusting pad (130) through bolts.

3. The compacted floating rocker structure of claim 1, wherein: A reinforcing plate (140) is further arranged between the upper end of the first pad (120) and the chassis body (100).

4. The compacted floating rocker structure of claim 3, wherein: The valve rod assembly (500) comprises a relay rod (510) and a valve core (520), the valve core (520) is arranged in the floating multi-way valve (200), one end of the relay rod (510) is hingedly connected with the valve core (520), and the other end of the relay rod (510) is hingedly connected with the connecting rod (400).

5. The compacted floating rocker structure of claim 4, wherein: The relay rod (510) can be stretched and contracted to adjust the length of the relay rod (510).

6. The compacted floating rocker structure of claim 1, wherein: ​ 7. The compacted floating rocker structure of claim 6, wherein: ​ 8. The compacted floating rocker structure of claim 7, wherein: The relay rod (510) comprises a first connecting rod (511) and a second connecting rod (512), and the first connecting rod (511) and the second connecting rod (512) are threadedly connected through a screw rod (513).

9. The compacted floating rocker structure of claim 8, wherein: A plurality of locking nuts (514) are threadedly connected on the screw rod (513).

10. The compacted floating rocker structure of claim 1, wherein: A mounting block (601) is detachably connected on the supporting leg (600), and the second mounting shaft (620) is arranged on the mounting block (601).

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