Scissor fork type arm support and aerial work platform

Abstract

The utility model belongs to the technical field of aerial work platforms, and discloses a scissors fork type arm frame and an aerial work platform, the scissors fork type arm frame comprises an arm frame assembly and a driving cylinder, the arm frame assembly comprises two fork frame sets arranged at intervals, each fork frame set is provided with a plurality of fork frames arranged in sequence, the fork frames of the two fork frame sets are arranged in a one-to-one opposite mode, and the driving cylinder is arranged on the fork frame sets. The adjacent fork frames of the same fork frame set are hinged through a first hinge piece, the two corresponding first hinge pieces on the two fork frame sets are fixed through a supporting piece, the first end of a cylinder body of the driving cylinder is hinged to the two opposite fork frames of one set, and the second end of a cylinder rod of the driving cylinder is hinged to the two opposite fork frames of the other set. The driving piece is fixed at the second end of the cylinder body; the aerial work platform comprises a chassis, a workbench and the scissor type arm support. The driving piece of the scissor-fork type arm support driving cylinder is arranged in the middle, installation interference on the supporting pieces is avoided, the supporting pieces are installed on every two oppositely-arranged fork frames, and the overall strength of an arm support is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial work platforms, in particular to a scissor-type boom and an aerial work platform. Background Art

[0002] The scissor-type aerial work platform is a widely used special equipment for aerial work. Its arm adopts a scissor-type mechanical structure, which can make the workbench have higher stability and reliable load-bearing capacity after lifting, making the work efficiency higher and safer.

[0003] At present, the scissor-type boom of the scissor-type aerial work platform includes two fork frame groups arranged at intervals, the fork frame group has multiple fork frames, and the multiple fork frames of the two fork frame groups are arranged one by one, and the two adjacent fork frames on the same fork frame group are hinged by a hinge shaft, and the two corresponding hinge shafts on the two fork frame groups are generally fixedly connected by a support pipe, thereby effectively ensuring the overall strength of the boom. The scissor-type boom generally adopts a drive cylinder for telescopic control. The drive cylinder has a drive part such as a motor, and the telescopic control of the scissor-type boom is correspondingly controlled by the cylinder rod extending relative to the cylinder body.

[0004] In the prior art, the driving member of the driving cylinder itself is arranged at the end of the driving cylinder. Such an arrangement will interfere with the installation space of the support tube and make it impossible to install the support tube in some parts, which will affect the overall strength of the boom. In severe cases, the fork frame of the lifting boom will bend, affecting the safety and reliability of the boom and reducing the overall life of the boom. Utility Model Content

[0005] The purpose of the utility model is to provide a scissor-type arm frame, in which the driving member of the driving cylinder is arranged in the middle of the driving cylinder to avoid interfering with the installation position of the support member, so that every two forks arranged opposite to each other can be installed with the support member, effectively ensuring the overall strength of the arm frame.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A scissor-type boom, comprising:

[0008] The arm frame assembly comprises two fork frame groups arranged at intervals, the fork frame groups have a plurality of fork frames arranged in sequence, the plurality of fork frames of the two fork frame groups are arranged opposite to each other, the adjacent fork frames of the same fork frame group are hinged by a first hinge, the two corresponding first hinges on the two fork frame groups are fixed by a support, and an installation space is formed between the two fork frame groups;

[0009] The driving cylinder is located in the installation space, and includes a cylinder body, a cylinder rod and a driving member. The first end of the cylinder body is hinged to one group of two fork frames arranged opposite to each other, the first end of the cylinder rod slides and retracts on the second end of the cylinder body, the second end of the cylinder rod is hinged to another group of two fork frames arranged opposite to each other, and the driving member is fixed to the second end of the cylinder body, and is used to drive the cylinder rod to retract and retract relative to the cylinder body.

[0010] Preferably, the fork frame comprises two hinged rods distributed in an X shape, and the corresponding two hinged rods on adjacent forks of the same fork frame group are hinged by the first hinge, and the intersection of the two hinged rods of the same fork frame is hinged by a second hinge.

[0011] Preferably, a first hinged joint is fixedly arranged between two fork frames that are arranged opposite to each other, and the first end of the cylinder body is hingedly arranged at the first hinged joint; and a second hinged joint is fixedly arranged between two fork frames that are arranged opposite to each other, and the second end of the cylinder rod is hingedly arranged at the second hinged joint.

[0012] Preferably, a reinforcing bracket is fixedly connected between the hinge rods of at least one group of two fork frames arranged opposite to each other.

[0013] Preferably, the driving member is configured as a motor, a housing of the motor is fixed to the second end of the cylinder body, an output shaft of the motor is drivingly connected to the cylinder rod, and rotation of the output shaft of the motor can drive the cylinder rod to extend and retract relative to the cylinder body.

[0014] Preferably, a mounting plate is fixed to the second end of the cylinder body, the housing of the motor is fixed to the mounting plate, and a transmission assembly and a drive sleeve are arranged on the mounting plate; wherein,

[0015] The driving sleeve is rotatably connected to the mounting plate, the output shaft of the motor is drivingly connected to the driving sleeve through the transmission assembly, the outer periphery of the cylinder rod is provided with an external thread, the driving sleeve is sleeved on the cylinder rod and is threadedly connected to the cylinder rod.

[0016] Preferably, the transmission assembly includes a driving gear and a driven gear, the driving gear and the driven gear are both rotatably connected to the mounting plate, the driving gear is fixedly sleeved on the output shaft of the motor, the driving gear is meshingly connected to the driven gear, the outer periphery of the driving sleeve is provided with meshing teeth, and the driving sleeve is meshingly connected to the driven gear through the meshing teeth.

[0017] Preferably, the transmission assembly includes a driving pulley, a driven pulley and a transmission belt, the driving pulley and the driven pulley are respectively fixedly mounted on the output shaft of the motor and the driving sleeve, and the transmission belt is mounted on the driving pulley and the driven pulley and is meshed and connected with the driving pulley and the driven pulley.

[0018] Preferably, the mounting plate is provided with a receiving cavity, the transmission assembly and the drive sleeve are both arranged in the receiving cavity, the output shaft of the motor extends into the receiving cavity, and the cylinder rod passes through the receiving cavity.

[0019] The utility model also provides an aerial work platform, which uses the above-mentioned scissor-type boom, so that the overall strength of the boom is effectively guaranteed, and the overall operation of the aerial work platform is more reliable and stable.

[0020] An aerial work platform, comprising any one of the scissor-type booms described above, and further comprising:

[0021] A chassis, wherein the fork frame at the lower end is connected to the chassis;

[0022] A workbench, wherein the fork frame located at the uppermost end is connected to the workbench.

[0023] Beneficial effects:

[0024] The utility model provides a scissor-type boom, wherein the driving cylinder is located in the installation space between two fork frames, and the driving cylinder includes a cylinder body, a cylinder rod and a driving member. The first end of the cylinder body is hinged to one of the two fork frames arranged opposite to each other, and the first end of the cylinder rod is slidably telescoped at the second end of the cylinder body, and the second end of the cylinder rod is hinged to the other two fork frames arranged opposite to each other. The driving member is fixed to the second end of the cylinder body, which is equivalent to a structure in which the driving member is centrally arranged. With such an arrangement, the driving member can always be located in the middle of the driving cylinder as a whole during the extension and retraction of the cylinder rod of the driving cylinder relative to the cylinder body, which can effectively avoid the driving member interfering with the installation position of the support member, so that each of the two fork frames arranged opposite to each other can be installed with the support member, effectively ensuring the overall strength and resistance to deformation of the boom, ensuring the reliability and safety of the boom operation, and ensuring the overall life of the boom.

[0025] The aerial work platform provided by the utility model applies the above-mentioned scissor-type boom, and the overall strength and resistance to deformation of the boom are effectively improved, and the overall operation of the aerial work platform is more reliable and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the aerial work platform provided by the utility model;

[0027] Figure 2 It is a structural schematic diagram of the driving cylinder provided by the utility model;

[0028] Figure 3 It is a structural schematic diagram of a transmission component provided by an embodiment of the utility model;

[0029] Figure 4 It is a structural schematic diagram of a transmission component part provided by another embodiment of the utility model.

[0030] In the figure:

[0031] 1. Boom assembly; 11. Fork frame assembly; 111. Fork frame; 1111. Articulated rod; 12. First hinged member; 13. Support member; 14. Second hinged member; 151. First hinged joint; 152. Second hinged joint; 16. Strengthening bracket;

[0032] 2. Driving cylinder; 21. Cylinder body; 22. Cylinder rod; 23. Motor; 24. Mounting plate; 25. Transmission assembly; 251. Driving gear; 252. Driven gear; 253. Driving pulley; 254. Driven pulley; 255. Transmission belt; 26. Driving sleeve;

[0033] 3. Chassis;

[0034] 4. Workbench. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 mechanical connection or an electrical 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.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] This embodiment provides an aerial work platform, referring to Figure 1 As shown, the aerial work platform includes a chassis 3, a workbench 4, and a scissor-type boom. Figure 1 to Figure 2 As shown, the arm assembly 1 includes two fork frame groups 11 arranged at intervals, and the fork frame group 11 has a plurality of fork frames 111 arranged in sequence, and the plurality of fork frames 111 of the two fork frame groups 11 are arranged opposite to each other, and the adjacent fork frames 111 of the same fork frame group 11 are hinged by a first hinge 12, and the two corresponding first hinges 12 on the two fork frame groups 11 are fixed by a support member 13, and the fork frame 111 at the lower end is connected to the chassis 3, and the fork frame 111 at the upper end is connected to the workbench 4. An installation space is formed between the two fork frame groups 11, and the drive cylinder 2 is located in the installation space. The driving cylinder 2 includes a cylinder body 21, a cylinder rod 22 and a driving member. The first end of the cylinder body 21 is hinged to one group of two fork frames 111 arranged opposite to each other. The first end of the cylinder rod 22 slides and retracts at the second end of the cylinder body 21. The second end of the cylinder rod 22 is hinged to another group of two fork frames 111 arranged opposite to each other. The driving member is fixed to the second end of the cylinder body 21 for driving the cylinder rod 22 to retract and retract relative to the cylinder body 21.

[0040] In this embodiment, the drive cylinder 2 is located in the installation space between the two fork frames 11. The drive cylinder 2 includes a cylinder body 21, a cylinder rod 22 and a drive member. The first end of the cylinder body 21 is hinged to one of the two fork frames 111 arranged opposite to each other. The first end of the cylinder rod 22 is slidably retracted at the second end of the cylinder body 21, and the second end of the cylinder rod 22 is hinged to the other two fork frames 111 arranged opposite to each other. The drive member is fixed to the second end of the cylinder body 21, which is equivalent to a structure in which the drive member is centrally placed. In this way, during the extension and retraction process of the cylinder rod 22 of the drive cylinder 2 relative to the cylinder body 21, the drive member is always located in the middle of the entire drive cylinder 2, which can effectively avoid the drive member interfering with the installation position of the support member 13, so that each of the two fork frames 111 arranged opposite to each other can be installed with the support member 13, effectively ensuring the strength and resistance to deformation of the entire boom, ensuring the reliability and safety of the boom operation, and ensuring the overall life of the boom. In addition, the aerial work platform that uses the above-mentioned scissor-type boom effectively improves the overall strength and resistance to deformation of the boom, and the overall operation of the aerial work platform is more reliable and stable.

[0041] In this embodiment, the support member 13 is configured as a support tube or a support rod.

[0042] Specifically, the fork frame 111 includes two articulated rods 1111 distributed in an X shape, and two corresponding articulated rods 1111 on adjacent forks 111 of the same fork frame group 11 are articulated via a first articulated member 12. It is worth mentioning that the multiple first articulated members 12 on the two fork frame groups 11 are arranged opposite to each other.

[0043] Furthermore, the intersection of the two hinged rods 1111 of the same fork frame 111 is hinged by the second hinge member 14. In this way, the two hinged rods 1111 of the same fork frame 111 can be connected, further enhancing the reliable connection and support strength of the fork frame assembly 11 as a whole.

[0044] Further, at least one set of hinge rods 1111 of two fork frames 111 disposed opposite to each other is fixedly connected with a reinforcing bracket 16. The provision of the reinforcing bracket 16 can further achieve reliable fixation between the two fork frame groups 11, ensuring that the two fork frame groups 11 perform telescopic actions synchronously.

[0045] More specifically, a first hinge joint 151 is fixedly arranged between two fork frames 111 arranged opposite to each other, and the first end of the cylinder body 21 is hingedly arranged at the first hinge joint 151, and a second hinge joint 152 is fixedly arranged between two fork frames 111 arranged opposite to each other, and the second end of the cylinder rod 22 is hingedly arranged at the second hinge joint 152. In this embodiment, the arrangement of the first hinge joint 151 and the second hinge joint 152 can provide a reliable hinge position for the cylinder body 21 and the cylinder rod 22. Specifically, a first hinge hole is provided on the first hinge joint 151, and a second hinge hole is correspondingly provided on the cylinder body 21, and the first hinge hole and the second hinge hole are hingedly arranged through a first hinge shaft. A third hinge hole is provided on the second hinge joint 152, and a fourth hinge hole is correspondingly provided on the cylinder body 21, and the third hinge hole and the fourth hinge hole are hingedly arranged through a second hinge shaft.

[0046] In this embodiment, refer to Figures 2 to 4 As shown, the driving member is configured as a motor 23, the housing of the motor 23 is fixed to the second end of the cylinder body 21, the output shaft of the motor 23 is in transmission connection with the cylinder rod 22, and the rotation of the output shaft of the motor 23 can drive the cylinder rod 22 to extend and retract relative to the cylinder body 21. The rotation of the output shaft of the motor 23 can drive the cylinder rod 22 to extend and retract relative to the cylinder body 21, thereby realizing the telescopic control of the fork frame assembly 11.

[0047] Specifically, a mounting plate 24 is fixed to the second end of the cylinder body 21, the housing of the motor 23 is fixed to the mounting plate 24, and a transmission assembly 25 and a drive sleeve 26 are arranged on the mounting plate 24; wherein the drive sleeve 26 is rotatably connected to the mounting plate 24, the output shaft of the motor 23 is transmission-connected to the drive sleeve 26 through the transmission assembly 25, the outer periphery of the cylinder rod 22 is provided with an external thread, the drive sleeve 26 is sleeved on the cylinder rod 22 and threadedly connected to the cylinder rod 22. Specifically, a lead screw nut structure is formed between the cylinder rod 22 and the drive sleeve 26, the output shaft of the motor 23 rotates, driving the transmission assembly 25, so that the transmission assembly 25 drives the drive sleeve 26 to rotate, and under the threaded cooperation between the drive sleeve 26 and the cylinder rod 22, the cylinder rod 22 is driven to complete the telescopic action relative to the cylinder body 21.

[0048] As an optional implementation, refer to Figure 3As shown, the transmission assembly 25 includes a driving gear 251 and a driven gear 252, both of which are rotatably connected to the mounting plate 24, the driving gear 251 is fixedly sleeved on the output shaft of the motor 23, the driving gear 251 is meshed with the driven gear 252, and the outer periphery of the driving sleeve 26 is provided with meshing teeth, and the driving sleeve 26 is meshed with the driven gear 252 through the meshing teeth. Specifically, the output shaft of the motor 23 rotates, driving the driving gear 251 to rotate, the driving gear 251 drives the driven gear 252 to rotate, and the driven gear 252 drives the driving sleeve 26 to rotate, and under the threaded cooperation between the driving sleeve 26 and the cylinder rod 22, the cylinder rod 22 is driven to complete the telescopic action relative to the cylinder body 21.

[0049] As an optional implementation, refer to Figure 4 As shown, the transmission assembly 25 includes a driving pulley 253, a driven pulley 254 and a transmission belt 255. The driving pulley 253 and the driven pulley 254 are respectively fixedly sleeved on the output shaft of the motor 23 and the driving sleeve 26. The transmission belt 255 is sleeved on the driving pulley 253 and the driven pulley 254 and meshedly connected with the driving pulley 253 and the driven pulley 254. Specifically, the output shaft of the motor 23 rotates, driving the driving pulley 253 to rotate, the driving gear 251 drives the transmission belt 255 to rotate, thereby driving the driven pulley 254 to rotate, and the driven pulley 254 drives the driving sleeve 26 to rotate, and under the threaded cooperation between the driving sleeve 26 and the cylinder rod 22, the cylinder rod 22 is driven to complete the telescopic action relative to the cylinder body 21.

[0050] It is worth mentioning that the above two structures are merely two optional embodiments of the transmission assembly 25, and the transmission assembly 25 can also be set to other structures.

[0051] Furthermore, the mounting plate 24 is provided with a receiving cavity, the transmission assembly 25 and the drive sleeve 26 are both arranged in the receiving cavity, the output shaft of the motor 23 extends into the receiving cavity, and the cylinder rod 22 passes through the receiving cavity. By providing the receiving cavity, important transmission components such as the transmission assembly 25 and the drive sleeve 26 can be better protected.

[0052] In this embodiment, the aerial work platform further includes a control system. The control system is communicatively connected to the motor 23 of the drive cylinder 2. Specifically, a control handle is provided on the workbench 4 of the aerial work platform. By pulling the control handle, the drive control system can send a signal to the motor 23, thereby correspondingly rotating the output shaft of the motor 23, and then controlling the corresponding lifting and lowering of the scissor-type boom.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A scissor-type boom, characterized in that: include: A boom assembly (1) comprises two fork frame groups (11) arranged at intervals, the fork frame group (11) having a plurality of fork frames (111) arranged in sequence, the plurality of fork frames (111) of the two fork frame groups (11) being arranged opposite to each other, the adjacent fork frames (111) of the same fork frame group (11) being hingedly connected via a first hinged member (12), the two corresponding first hinged members (12) on the two fork frame groups (11) being fixed via a support member (13), and an installation space being formed between the two fork frame groups (11); A driving cylinder (2) is located in the installation space, and comprises a cylinder body (21), a cylinder rod (22) and a driving member, wherein the first end of the cylinder body (21) is hinged to one group of two fork frames (111) arranged opposite to each other, the first end of the cylinder rod (22) slides and retracts at the second end of the cylinder body (21), the second end of the cylinder rod (22) is hinged to another group of two fork frames (111) arranged opposite to each other, and the driving member is fixed to the second end of the cylinder body (21) and is used to drive the cylinder rod (22) to retract relative to the cylinder body (21).

2. The scissor-type boom according to claim 1, characterized in that: The fork frame (111) comprises two hinged rods (1111) distributed in an X shape, and two corresponding hinged rods (1111) on adjacent forks (111) of the same fork frame group (11) are hinged via the first hinged component (12), and the intersection of the two hinged rods (1111) of the same fork frame (111) is hinged via a second hinged component (14).

3. The scissor-type boom according to claim 1, characterized in that: A first hinge joint (151) is fixedly arranged between two of the fork frames (111) disposed opposite to each other in one group, and a first end of the cylinder body (21) is hingedly arranged on the first hinge joint (151); a second hinge joint (152) is fixedly arranged between two of the fork frames (111) disposed opposite to each other in another group, and a second end of the cylinder rod (22) is hingedly arranged on the second hinge joint (152).

4. The scissor-type boom according to claim 2, characterized in that: A reinforcing bracket (16) is fixedly connected between the hinge rods (1111) of at least one group of two fork frames (111) arranged opposite to each other.

5. The scissor-type boom according to claim 1, characterized in that: The driving member is configured as a motor (23), a housing of the motor (23) is fixed to the second end of the cylinder body (21), an output shaft of the motor (23) is drivingly connected to the cylinder rod (22), and rotation of the output shaft of the motor (23) can drive the cylinder rod (22) to extend and retract relative to the cylinder body (21).

6. The scissor-type boom according to claim 5, characterized in that: A mounting plate (24) is fixed to the second end of the cylinder body (21), a housing of the motor (23) is fixed to the mounting plate (24), and a transmission assembly (25) and a drive sleeve (26) are arranged on the mounting plate (24); wherein: The drive sleeve (26) is rotatably connected to the mounting plate (24); the output shaft of the motor (23) is transmission-connected to the drive sleeve (26) via the transmission assembly (25); an outer circumference of the cylinder rod (22) is provided with an external thread; the drive sleeve (26) is sleeved on the cylinder rod (22) and threadedly connected to the cylinder rod (22).

7. The scissor-type boom according to claim 6, characterized in that: The transmission assembly (25) comprises a driving gear (251) and a driven gear (252); the driving gear (251) and the driven gear (252) are both rotatably connected to the mounting plate (24); the driving gear (251) is fixedly sleeved on the output shaft of the motor (23); the driving gear (251) is meshingly connected with the driven gear (252); the outer periphery of the driving sleeve (26) is provided with meshing teeth; the driving sleeve (26) is meshingly connected with the driven gear (252) via the meshing teeth.

8. The scissor-type boom according to claim 6, characterized in that: The transmission assembly (25) comprises a driving pulley (253), a driven pulley (254) and a transmission belt (255); the driving pulley (253) and the driven pulley (254) are respectively fixedly sleeved on the output shaft of the motor (23) and the driving sleeve (26); the transmission belt (255) is sleeved on the driving pulley (253) and the driven pulley (254), and is meshedly connected with the driving pulley (253) and the driven pulley (254).

9. The scissor-type boom according to claim 6, characterized in that: The mounting plate (24) is provided with a receiving cavity, the transmission assembly (25) and the drive sleeve (26) are both arranged in the receiving cavity, the output shaft of the motor (23) extends into the receiving cavity, and the cylinder rod (22) passes through the receiving cavity.

10. An aerial work platform, characterized in that: The scissor-type boom according to any one of claims 1 to 9, the aerial work platform further comprising: A chassis (3), wherein the fork frame (111) located at the lower end is connected to the chassis (3); A workbench (4), wherein the fork frame (111) located at the uppermost end is connected to the workbench (4).

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