Steering mechanism and aerial work platform bottom vehicle

Abstract

The utility model discloses a steering mechanism and an aerial work platform bottom car, the steering mechanism comprises a fixedly arranged driving mechanism and rotating wheel supports which are movably arranged on the two sides of the driving mechanism and are symmetrically arranged, the driving mechanism is a power cylinder of a double-outlet-rod structure, the two output ends of the power cylinder are hinged to arc-shaped connecting rods, and the arc-shaped connecting rods are connected with the rotating wheel supports. The other ends of the two arc-shaped connecting rods are hinged to the two rotating wheel supports respectively. The power cylinder with the double-outlet-rod structure is adopted as a steering driving mechanism, the structure of a transmission part is adjusted, compared with an existing oil cylinder with a single-outlet-rod structure, the power cylinder is directly connected with the rotating wheel supports on the two sides through the arc-shaped connecting rod, the connecting rod of a long and thin structure is omitted, and the cost is reduced. Parts are reduced, meanwhile, the influence of synchronism difference caused by installation errors is reduced, the overall structure is simpler, the synchronism of steering on the two sides is improved, and meanwhile the stability of the overall structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial work equipment, in particular to a steering mechanism and an aerial work platform undercarriage. Background Art

[0002] The aerial work platform consists of a base vehicle, a platform and a lifting mechanism connecting the two. The mobile function is achieved through the base vehicle, and the platform is driven to rise and fall through the lifting mechanism, thereby realizing aerial work at different heights. It is widely used in aerial work in various systems such as fire fighting and rescue, electricity, street lights, advertising, film shooting, communications, gardening, transportation, industry and mining, docks, as well as installation, maintenance and climbing operations in large venues, interior and exterior decoration of factories, ships, civil aviation, steel structures and other industries.

[0003] The steering mechanism is an important part of the vehicle bottom, which is used to realize the steering of the vehicle bottom. The traditional aerial work platform vehicle bottom steering mechanism has a complex structure and a large number of parts, which will produce excessive contact wear and affect the stability and service life of the steering system. The Chinese utility model with the authorization announcement number CN 211078389 U discloses a steering structure of the aerial work platform, including two symmetrically arranged rotating wheel brackets, and two parallel and opposite connecting rods are arranged between the two rotating wheel brackets; the connecting rod includes a straight rod part, and the two ends of the straight rod part are respectively provided with a first curved rod part and a second curved rod part hinged to the two rotating wheel brackets; a positioning pin for limiting the spacing is arranged between the two first curved rod parts and between the two second curved rod parts; a rotatable push plate is arranged between the two first curved rod parts, and the push plate is connected to a steering cylinder. The steering cylinder is used to transmit pressure to the push plate, driving the connecting rod to move with the steering cylinder, and realizing the synchronous left or right steering of the rotating wheel brackets on both sides through the connecting rod. Since the right-side wheel bracket and the steering cylinder are connected in sequence by a connecting rod and a push plate, there is inevitably an installation gap during assembly. Therefore, in actual use, the synchronization with the left-side wheel bracket is poor, the transmission structure is long, and the overall stability is poor. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and proposes a steering mechanism and an aerial work platform undercarriage, which has a simple structure and can not only improve the synchronization of the steering on both sides, but also improve the stability of the entire structure.

[0005] The technical solution to achieve the purpose of this utility model is:

[0006] A steering mechanism comprises a fixed driving mechanism and symmetrically arranged rotating wheel brackets which are movably arranged on both sides of the driving mechanism. The driving mechanism is a power cylinder with a double-rod structure. Both output ends of the power cylinder are hinged with arc-shaped connecting rods, and the other ends of the two arc-shaped connecting rods are respectively hinged to two rotating wheel brackets.

[0007] Furthermore, the power cylinder is a pneumatic cylinder, a hydraulic cylinder or an electric cylinder.

[0008] Furthermore, a mounting block close to the end is symmetrically provided on the top of the cylinder body of the power cylinder. The mounting block is horizontally arranged and perpendicular to the axial direction of the power cylinder, and mounting holes are symmetrically provided at both ends.

[0009] Furthermore, the arc connecting rod comprises two arc bent rods aligned in the vertical direction, the two output ends of the power cylinder are respectively hinged between the two arc bent rods of the corresponding arc connecting rod, and the rotating wheel bracket is provided with a connecting component passing through the two arc bent rods.

[0010] Furthermore, a connecting hole is provided on the rotating wheel bracket, and the connecting assembly includes a pin sleeve that penetrates two arc-shaped bent rods in a vertical direction and a pin shaft arranged in the pin sleeve with a coaxial gap, the lower end of the pin shaft is inserted into the connecting hole and is provided with an annular limit platform located above the connecting hole, the lower end of the pin sleeve is provided with a first gasket located between the lower end surface of the arc-shaped connecting rod and the annular limit platform, and the upper end is provided with a second gasket located on the upper end surface of the arc-shaped connecting rod, and a screw tightened on the top of the pin shaft is tightly provided above the second gasket.

[0011] Furthermore, a plurality of reinforcing pins arranged along the arc direction are connected between the two arc-shaped bent rods of the arc-shaped connecting rod.

[0012] A vehicle for an aerial work platform comprises a frame, wherein the steering mechanism as described above is installed at the bottom of the front end of the frame, and rear wheel assemblies are symmetrically arranged on both sides of the bottom of the rear end, the cylinder body of the power cylinder is fixedly connected to the frame, the tops of the two rotating wheel brackets are rotatably connected to the frame, and front wheel assemblies are arranged on the outer sides of the bottom.

[0013] Furthermore, a ladder is provided at the rear end of the frame, and the ladder includes a handrail frame fixedly connected to the frame and arranged opposite to the frame, and a plurality of horizontally arranged cross frames are fixedly connected between two of the handrail frames.

[0014] Furthermore, a handle hole opened on the handrail frame is provided above each of the horizontal frames.

[0015] Furthermore, the upper end surface of the cross frame is a serrated surface.

[0016] By adopting the above technical solution, the utility model has the following beneficial effects:

[0017] (1) The utility model adopts a power cylinder with a double-rod structure as a steering drive mechanism, and makes structural adjustments to the transmission components. Compared with the existing oil cylinder with a single-rod structure, the power cylinder is directly connected to the wheel brackets on both sides through an arc-shaped connecting rod, eliminating the slender connecting rod. While reducing the parts, the influence of synchronization differences caused by installation errors is reduced, and the overall structure is more concise, which not only improves the synchronization of steering on both sides, but also improves the stability of the entire structure.

[0018] (2) The power cylinder of the utility model can be a pneumatic cylinder, a hydraulic cylinder or an electric cylinder to meet different power usage requirements.

[0019] (3) The utility model provides a mounting block on the cylinder body of the power cylinder, thereby facilitating the installation and fixation of the drive mechanism.

[0020] (4) The arc-shaped connecting rod of the utility model is composed of a double-layer arc-shaped bent rod, and the output end of the driving mechanism is hinged to the two arc-shaped bent rods, so the overall structure is more stable.

[0021] (5) The connection assembly of the utility model adopts a special structural design. The gaskets at both ends of the pin sleeve are pressed tightly by screws and annular limit platforms, so as to limit the pin sleeve. The pin shaft is limited by the annular limit platform and the first gasket. The pin shaft is directly inserted into the connecting hole to realize the connection between the arc connecting rod and the rotating wheel bracket, eliminating the complicated installation process and making assembly more convenient.

[0022] (6) The utility model adds a reinforcing pin between the two arc-shaped bending rods to further improve the structural strength of the arc-shaped connecting rod, avoid breakage, and extend the service life.

[0023] (7) The aerial work platform undercarriage of the utility model adopts a steering mechanism with a power cylinder having a double-rod structure as a driving mechanism, thereby achieving better steering synchronization and better structural stability.

[0024] (8) The utility model aerial work platform has a pre-installed ladder on the bottom vehicle, which makes it convenient for workers to go up and down and improves safety in use.

[0025] (9) The utility model handrail frame is provided with a handle hole, which is convenient for workers to hold the handrail frame tightly, thereby further improving the safety of use.

[0026] (10) The upper surface of the horizontal frame of the utility model is a serrated surface, which increases the surface friction and effectively prevents workers from slipping when using it. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0028] Figure 1It is a three-dimensional diagram of the bottom vehicle of the aerial work platform of the utility model;

[0029] Figure 2 It is a three-dimensional diagram of the steering mechanism of the utility model;

[0030] Figure 3 It is a cross-sectional view of the steering mechanism of the utility model.

[0031] The reference numerals in the accompanying drawings are:

[0032] A frame 100, a rear wheel assembly 200, and a front wheel assembly 300;

[0033] Driving mechanism 1, mounting block 1-1, rotating wheel bracket 2, arc connecting rod 3, arc bent rod 3-1, reinforcing pin 3-2, connecting assembly 4, pin sleeve 4-1, pin shaft 4-2, annular limit platform 4-2-1, first gasket 4-3, second gasket 4-4, screw 4-5, handrail frame 5, handle hole 5-1, cross frame 6. DETAILED DESCRIPTION

[0034] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] (Example 1)

[0036] like Figures 1 to 3 The aerial work platform undercarriage shown includes a frame 100, a steering mechanism is installed at the bottom of the front end of the frame 100, and rear wheel assemblies 200 are symmetrically arranged on both sides of the bottom of the rear end. The steering mechanism includes a driving mechanism 1, a rotating wheel bracket 2 and an arc-shaped connecting rod 3, wherein the driving mechanism 1 is fixedly connected to the frame 100, and the rotating wheel bracket 2 is provided with two and symmetrically arranged at both ends of the driving mechanism, and is rotatably connected to the frame 100. The outer sides of the bottoms of the two rotating wheel brackets 2 are each provided with a front wheel assembly 300, and the arc-shaped connecting rod 3 is also provided with two. The driving mechanism 1 is a power cylinder with a double-rod structure, and the two output ends of the power cylinder are respectively hinged to the two arc-shaped connecting rods 3, and the other ends of the two arc-shaped connecting rods 3 are respectively hinged to the two rotating wheel brackets 2. The power cylinder with a double-rod structure pulls the two arc-shaped connecting rods 3 to move synchronously, thereby driving the two rotating wheel brackets 2 to move synchronously, so as to realize the synchronous steering of the two front wheel assemblies 300.

[0037] Specifically, the power cylinder is a pneumatic cylinder, a hydraulic cylinder or an electric cylinder to meet different power usage requirements. The present embodiment is a hydraulic cylinder with a simple structure. The top of the cylinder body of the power cylinder is integrally formed and symmetrically provided with a mounting block 1-1 near the end. The mounting block 1-1 is horizontally arranged and perpendicular to the axis direction of the power cylinder. Both ends are symmetrically provided with mounting holes. Bolts are passed through the mounting holes and then tightened on the vehicle frame 100 to fix the drive mechanism 1, facilitate installation, and do not need to configure a cylinder body mounting seat, thereby reducing the number of parts and manufacturing costs.

[0038] The arc connecting rod 3 includes two arc-shaped curved rods 3-1 aligned in the vertical direction, and the two output ends of the power cylinder are respectively hinged between the two arc-shaped curved rods 3-1 of the corresponding arc-shaped connecting rod, so that the overall structure is more stable. In order to further improve the structural strength of the transmission component, a plurality of reinforcing pins 3-2 arranged along the arc direction are connected between the two arc-shaped curved rods 3-1 of the arc-shaped connecting rod 3 of this embodiment. A connecting assembly 4 that penetrates the two arc-shaped curved rods 3-1 is provided on the rotating wheel bracket 2. A connecting hole is provided on the rotating wheel bracket 2, and the connecting assembly 4 includes a pin sleeve 4-1 that penetrates two arc-shaped bent rods 3-1 in the vertical direction and a pin shaft 4-2 that is coaxially spaced in the pin sleeve 4-1. The lower end of the pin shaft 4-2 is inserted into the connecting hole and is provided with an annular limit platform 4-2-1 located above the connecting hole. The lower end of the pin sleeve 4-1 is provided with a first gasket 4-3 located between the lower end surface of the arc-shaped connecting rod 3 and the annular limit platform 4-2-1, and the upper end is provided with a second gasket 4-4 located on the upper end surface of the arc-shaped connecting rod 3. A screw 4-5 tightened on the top of the pin shaft 4-2 is tightly pressed above the second gasket 4-4. The gaskets at both ends of the pin sleeve 4-1 are pressed tightly by the screw 4-5 and the annular limit platform 4-2-1, so as to limit the pin sleeve 4-1, and the annular limit platform 4-2-1 and the first gasket 4-3 are used to limit the pin shaft 4-2. The pin shaft 4-2 is directly inserted into the connecting hole to realize the connection between the arc connecting rod 3 and the rotating wheel bracket 2, eliminating the complicated installation process and making the assembly more convenient.

[0039] A ladder is provided at the rear end of the frame 100 to facilitate workers to go up and down and improve safety in use. The ladder includes a handrail frame 5 fixedly connected to the frame 100 and arranged opposite to each other, and a plurality of horizontally arranged cross frames 6 are fixedly connected between the two handrail frames 5. In order to further improve safety in use, a handle hole 5-1 is provided on the handrail frame 5 above each cross frame 6 to facilitate workers to hold the handrail frame. The upper end surface of the cross frame 6 is a serrated surface to improve surface friction and effectively prevent workers from slipping when using it.

[0040] The aerial work platform undercarriage of the utility model adopts a power cylinder with a double-rod structure as the steering mechanism of the driving mechanism 1, and makes structural adjustments to the transmission components. Compared with the existing oil cylinder with a single-rod structure, the power cylinder is directly connected to the turntable brackets on both sides through an arc-shaped connecting rod, eliminating the connecting rod of the slender structure. While reducing the parts, the influence of the synchronization difference caused by the installation error is reduced. The overall structure is more concise, which not only improves the synchronization of the steering on both sides, but also improves the stability of the entire structure.

[0041] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steering mechanism, characterized in that: It includes a fixed driving mechanism and a rotating wheel bracket that is movably arranged on both sides of the driving mechanism and symmetrically arranged. The driving mechanism is a power cylinder with a double-rod structure. The two output ends of the power cylinder are hinged with arc-shaped connecting rods, and the other ends of the two arc-shaped connecting rods are respectively hinged to the two rotating wheel brackets.

2. A steering mechanism according to claim 1, characterized in that: The power cylinder is a pneumatic cylinder, a hydraulic cylinder or an electric cylinder.

3. A steering mechanism according to claim 1, characterized in that: The top of the cylinder body of the power cylinder is symmetrically provided with mounting blocks close to the ends. The mounting blocks are arranged horizontally and perpendicular to the axial direction of the power cylinder, and mounting holes are symmetrically provided at both ends.

4. A steering mechanism according to claim 1, characterized in that: The arc connecting rod comprises two arc bent rods aligned in the vertical direction, the two output ends of the power cylinder are respectively hinged between the two arc bent rods of the corresponding arc connecting rod, and the rotating wheel bracket is provided with a connecting component penetrating the two arc bent rods.

5. A steering mechanism according to claim 4, characterized in that: The rotating wheel bracket is provided with a connecting hole, and the connecting assembly includes a pin sleeve that passes through two arc-shaped bent rods in a vertical direction and a pin shaft with a coaxial gap arranged in the pin sleeve, the lower end of the pin shaft is inserted into the connecting hole and is provided with an annular limit platform located above the connecting hole, the lower end of the pin sleeve is provided with a first gasket located between the lower end surface of the arc-shaped connecting rod and the annular limit platform, and the upper end is provided with a second gasket located on the upper end surface of the arc-shaped connecting rod, and a screw tightened on the top of the pin shaft is tightly provided above the second gasket.

6. A steering mechanism according to claim 4, characterized in that: A plurality of reinforcing pins arranged along the arc direction are connected between the two arc-shaped bent rods of the arc-shaped connecting rod.

7. A vehicle for an aerial work platform, characterized in that: It comprises a frame, the front end bottom of the frame is equipped with a steering mechanism as claimed in any one of claims 1 to 6, rear wheel assemblies are symmetrically arranged on both sides of the rear end bottom, the cylinder body of the power cylinder is fixedly connected to the frame, the tops of the two rotating wheel brackets are rotatably connected to the frame, and front wheel assemblies are arranged on the outer sides of the bottom.

8. The aerial work platform undercarriage according to claim 7, characterized in that: A ladder is arranged at the rear end of the frame. The ladder comprises a handrail frame which is fixedly connected to the frame and arranged opposite to the frame. A plurality of horizontally arranged cross frames are fixedly connected between two of the handrail frames.

9. The aerial work platform undercarriage according to claim 8, characterized in that: A handle hole opened on the handrail frame is arranged above each of the horizontal frames.

10. The aerial work platform undercarriage according to claim 8, characterized in that: The upper end surface of the cross frame is a serrated surface.

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