Folding arm crane with high supporting stability

Abstract

A vertical supporting rod is arranged on a foldable suspension arm of the high-supporting-stability folding arm crane, and a pair of rotary supporting wheels is arranged at the bottom end of the vertical supporting rod; a rotary supporting ring is coaxially and fixedly arranged on the stand column. The central axis of the rotary supporting wheel is parallel to the central axis of the rotary supporting ring, and the circumferential side face of the rotary supporting wheel abuts against the circumferential side face of the rotary supporting ring. When the foldable suspension arm rotates, the rotary supporting wheel rolls along the circumferential face of the rotary supporting ring, rotation of the foldable suspension arm is not hindered, meanwhile, the vertical supporting rod, the inclined supporting rod, the rotary supporting wheel and the rotary supporting ring are matched to play a role in supporting the foldable rotary arm, and therefore the overall supporting stability of the folding arm crane is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting equipment, and in particular relates to a folding arm crane with high support stability. Background Art

[0002] The crane includes a boom and a lifting device (such as an electric hoist) arranged on the boom. The boom is suspended in the air by hanging or supporting a column so that the lifting device is in the air, which is convenient for lifting materials. However, most of the current booms are fixed-length structures and cannot be folded, which limits the scope of use of the crane. It is difficult to move over a large range in daily use and occupies too much space. In order to solve the above problems, the boom is generally designed as a rotatable and foldable structure. The main arm is connected to the column of the crane through a rotating mechanism and can rotate around the main arm. The auxiliary arm is connected to the main arm through a rotating mechanism and can rotate around the main arm, so that the auxiliary arm can be folded relative to the main arm and ensure that the crane has a larger operating range. However, this design requires the rotating mechanism to bear the dual load of the boom's own weight and the weight of the hoisted object. The rotation and folding action under high load is prone to wear at the connection, affecting the support stability of the equipment and shortening the maintenance cycle of the equipment.

[0003] Therefore, in view of the above technical problems, it is necessary to provide a folding arm crane with high support stability. Summary of the invention

[0004] The object of the present invention is to provide a folding arm crane with high support stability.

[0005] In order to achieve the above object, the technical solution specifically provided by the present invention is as follows: A high support stability folding arm crane comprises a column and a foldable arm, the foldable arm is rotatably assembled on the top of the column, a vertical support rod and a plurality of diagonal support rods are fixedly arranged on the foldable arm, the vertical support rod is parallel to the column; one end of the diagonal support rod is fixed to the foldable arm, and the other end is fixed to an end of the vertical support rod away from the foldable arm; the top end of the vertical support rod is fixed to the foldable arm, and a pair of rotating support wheels are arranged at the bottom end; a rotating support ring is coaxially fixed on the column; the central axis of the rotating support wheel is parallel to the central axis of the rotating support ring, and the circumferential side surface of the rotating support wheel abuts against the circumferential side surface of the rotating support ring.

[0006] The foldable boom is rotatably assembled on the top of the column, which ensures the operating range of the folding arm crane to the greatest extent. At the same time, in order to improve the overall support stability of the folding arm crane and reduce the damage to the rotating connection caused by the load, a rotating support wheel is set at the end of the vertical support rod set on the foldable boom, and a rotating support ring is set on the column. When the foldable boom rotates, the rotating support wheel rolls along the circumference of the rotating support ring without hindering the rotation of the foldable boom. At the same time, the vertical support rod, the diagonal support rod, the rotating support wheel and the rotating support ring cooperate to support the foldable rotating arm, thereby improving the overall support stability of the folding arm crane. Furthermore, the width of the rotating support wheel is greater than the width of the rotating support ring, which is conducive to improving the support stability.

[0007] In one or more embodiments of the present invention, the radii of the two rotating support wheels are respectively recorded as R1 and R2, and the diameter of the rotating support ring is recorded as D. Then, the distance L between the central axes of the two rotating support wheels satisfies the following relationship: R1+R2<L<D+R1+R2.

[0008] The two rotating support wheels that meet the above requirements can evenly disperse the pressure and play a stable supporting role.

[0009] In one or more embodiments of the present invention, the diameters of the two rotating support wheels are equal, which can provide stable support. Meanwhile, rotating support wheels of equal diameter can be mass-produced and assembled without considering the installation positions of rollers of different specifications, making assembly easier.

[0010] In one or more embodiments of the present invention, a mounting plate is fixedly provided at the bottom end of the vertical support rod, and the rotating support wheel is rotatably mounted on the mounting plate. During assembly, the rotating support wheel can be first assembled on the mounting plate and then fixed to the vertical support rod as a whole, which is easier to assemble.

[0011] In one or more embodiments of the present invention, the mounting plate includes a fixed plate fixed to the vertical support rod and two movable plates rotatably connected to the fixed plate, and the two rotating support wheels are respectively mounted on the two movable plates; the fixed plate is provided with an adjustment mechanism for driving the movable plate to rotate to adjust the spacing between the two rotating support wheels. The joints of the folding arm crane are inevitably loose due to wear and tear, and the rotating support wheels are set to have adjustable spacing. In actual use, the spacing between the two rotating support wheels can be adjusted as needed so that the rotating support wheels abut against the rotating support ring to ensure sufficient supporting force, thereby playing a stable supporting role.

[0012] In one or more embodiments of the present invention, the adjustment mechanism includes a fixed block, an adjustment screw and two transmission connecting rods; the fixed block is fixedly arranged on the fixed plate and an adjustment screw is arranged on the fixed block perpendicular to the length direction of the column, and the adjustment screw is threadedly connected to the fixed block; the adjustment screw is provided with a rotatable movable block; one end of the transmission connecting rod is rotatably connected to the movable block, and the other end is rotatably connected to the movable plate. When the spacing between the two rotating support wheels needs to be adjusted, the adjustment screw is rotated, and the two rotating support wheels are pulled away from or close to each other by the transmission connecting rod, and the adjustment operation is simple.

[0013] In one or more embodiments of the present invention, the fixing block, the adjusting screw and the transmission connecting rod are all arranged on the upper side or the lower side of the fixing plate, which is easier to assemble.

[0014] In one or more embodiments of the present invention, a rotary block is provided at one end of the adjusting screw away from the column to facilitate the application of force during rotation adjustment, thereby increasing operational convenience.

[0015] In one or more embodiments of the present invention, a damping plate is provided on the mounting plate, and the resistance is appropriately increased by means of the damping plate, so that the rotating support wheel rolls more smoothly than the rotating support ring, which is conducive to the smooth rotation of the foldable boom.

[0016] In one or more embodiments of the present invention, an L-shaped fixed end plate is provided on the bottom surface of the mounting plate, a fixed sleeve is provided on the side of the L-shaped fixed end plate facing the column, a connecting rod is coaxially inserted in the fixed sleeve, and the damping plate is fixed to the end of the connecting rod facing the column. This damping plate is easy to assemble and easy to disassemble and replace; further, the connecting rod can also be set to be retractable, and the position of the damping plate can be adjusted as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a high support stability folding arm crane in Example 1 of the present invention; Figure 2 Schematic diagram of the rotating support wheel, rotating support ring and its auxiliary structure in Example 1 of the present invention Figure 1 ; Figure 3 Schematic diagram of the rotating support wheel, rotating support ring and its auxiliary structure in Example 1 of the present invention Figure 2 ; Figure 4 The structure of the foldable boom in Example 1 of the present invention is shown in FIG. Figure 1 ; Figure 5 The structure of the foldable boom in Example 1 of the present invention is shown in FIG. Figure 2 ; Figure 6It is a schematic diagram of the rotating support wheel, the rotating support ring and its auxiliary structures in Example 2 of the present invention; Figure 7 It is a schematic diagram of the rotating support wheel, the mounting plate and its accessory structure in Example 1 of the present invention.

[0018] Description of reference numerals: 1. Column; 2. Foldable boom; 21. Main boom; 211. Rotating bushing; 212. Intermediate rotating shaft; 213. Tapered roller bearing; 214. Deep groove ball bearing; 22. Jib; 221. Connecting cross plate; 222. Connecting vertical plate; 3. Intelligent hoist drive module; 4. Control handle; 41. End tooling; 5. Vertical support rod; 6. Diagonal support rod; 7. Rotating support wheel; 8. Rotating support ring; 9. Mounting plate; 91. Fixed plate; 911. Fixed block; 912. Adjusting screw; 913. Rotating block; 914. Movable block; 915. Damping plate; 916. L-shaped fixed end plate; 917. Fixed bushing; 918. Connecting rod; 92. Movable plate; 921. Transmission connecting rod; 922. Loose-leaf; 10. Wire rope. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present application will be further described in detail below in conjunction with the accompanying drawings. Example 1

[0020] like Figure 1 As shown, a high support stability folding arm crane includes an intelligent hoist drive module 3, a foldable boom 2, a control handle 4 and an end fixture 41. The bottom of the column 1 is fixedly installed in the working area by anchor screws. An intelligent hoist drive module 3 is arranged on the top of the column 1, and the intelligent hoist drive module 3 is connected to one end of the foldable boom 2, and a steel wire rope 10 is led out to pass around the pulley at the other end of the folding arm crane, and connected to the control handle 4 hanging below the pulley. The intelligent hoist drive module 3 is used to provide a driving force in the vertical direction, suspend and lift the end fixture 41 and the load; the foldable boom 2 is used to install and support the intelligent hoist drive module 3, and provide a circular working space that can be dragged freely; a weight sensor module is installed inside the control handle 4, which is on the same vertical axis as the steel wire rope 10 and the end fixture 41, and plays the role of collecting the load weight signal. The end of the control handle 4 has a universal threaded interface, which is connected to the thread at the top of the end fixture 41, and the end fixture 41 is used to hang materials.

[0021] like Figure 1As shown, the foldable boom 2 includes a main arm 21 and a secondary arm 22. One end of the main arm 21 is connected to the intelligent hoist drive module 3 and is movably arranged on the top of the column 1, so that the other end of the main arm 21 can rotate with the connection end of the main arm 21 and the top of the column 1 as the center point. The intelligent hoist drive module 3 is installed at the rear end of the main arm 21 of the folding arm crane. The secondary arm 22 is fixedly connected to the main arm 21 through a bearing and can be horizontally bent relative to the main arm 21.

[0022] like Figure 1 , Figure 2 As shown, in order to improve the stability of supporting the foldable boom 2, a vertical support rod 5 and an oblique support rod 6 are arranged between the middle of the main arm 21 and the column 1. The vertical support rod 5 is arranged parallel to the column 1, and its top end is fixed to the main arm 21 of the foldable boom 2. The bottom end of the oblique support rod 6 is fixed to the vertical support rod 5, and the top end is fixed to the main arm 21 of the foldable boom 2. Together with the vertical support rod 5, a V-shaped structure supporting the foldable boom 2 is formed.

[0023] like Figure 2 As shown, in order to weaken the influence of the deadweight and load of the foldable boom 2 on the rotating connection, improve the support stability, reduce wear and extend the maintenance cycle, a mounting plate 9 is fixedly provided at the bottom end of the vertical support rod 5. A stack of rotating support wheels 7 are rotatably mounted on the bottom surface of the mounting plate 9, and the central axis of the rotating support wheel 7 is parallel to the column 1. On the column 1, a rotating support ring 8 is coaxially fixedly installed. The circumferential side surface of the rotating support wheel 7 abuts against the circumferential side surface of the rotating support ring 8. In this way, during the rotation of the foldable boom 2, the vertical support rod 5, the diagonal support rod 6 and the rotating support wheel 7 rotate synchronously around the column 1. During this process, the rotating support wheel 7 rolls along the circumference of the rotating support ring 8, which does not affect the rotation of the foldable boom 2. At the same time, the rotating support ring 8, the rotating support wheel 7, the vertical support rod 5 and the diagonal support rod 6 cooperate to support the foldable boom 2, so that the folding arm crane as a whole has a high degree of support stability.

[0024] like Figure 2 , Figure 3 As shown, in order to evenly disperse the pressure and better play the supporting role, the distance L between the central axes of the two rotating support wheels 7 needs to satisfy the following relationship: R1+R2<L<R1+R2+D Wherein, R1 and R2 represent the radius of the two rotating support wheels 7 respectively, and D represents the diameter of the rotating support ring 8. In this embodiment, the diameters of the two rotating support wheels 7 are the same, that is, R1=R2. In other embodiments, rotating support wheels 7 with different radii may also be selected.

[0025] like Figure 2 , Figure 3As shown, in order to improve the stability of the rotating support wheel 7 rolling along the rotating support ring 8, an L-shaped fixed end plate 916 is fixedly provided on the bottom surface of the mounting plate 9, and a fixed sleeve 917 is fixedly provided on the side of the L-shaped fixed end plate 916 facing the column 1, and a connecting rod 918 is coaxially inserted in the fixed sleeve 917, and an arc-shaped damping plate 915 is provided at one end of the connecting rod 918 and the fixed sleeve 917. The damping plate 915 is made of elastic deformation materials such as rubber, and its edge abuts against the rotating support wheel 7 to appropriately increase the rotation damping of the rotating support wheel 7, which is conducive to maintaining the rotation stability of the rotating support wheel 7. As needed, in other embodiments, an elastic member can also be assembled in the fixed sleeve 917, and the connecting rod 918 can be configured to be movable, and the pressure on the damping plate 915 can be buffered by the cooperation of the elastic member and the connecting rod 918.

[0026] like Figure 4 , Figure 5 The main arm 21 and the auxiliary arm 22 of the foldable boom 2 are connected by a rotating mechanism. Specifically, a pair of connecting horizontal plates 221 are fixed at the end of the auxiliary arm 22, and a pair of connecting vertical plates 222 are fixed on the connecting horizontal plates 221, and the connecting vertical plates 222 are arranged one above the other. A rotating sleeve 211 is fixed at the end of the main arm 21, and the rotating sleeve 211 is located between the two connecting vertical plates 222. An intermediate rotating shaft 212 is arranged in the rotating sleeve 211, and the two ends of the intermediate rotating shaft 212 are respectively connected to the two connecting vertical plates 222 for rotation. A tapered roller bearing 213 is arranged at the top of the intermediate rotating shaft 212, and a deep groove ball bearing 214 is arranged at the bottom, so that when the auxiliary arm 22 is folded and rotated, the intermediate rotating shaft 212 and the rotating sleeve 211 can maintain good concentricity, which can also reduce the wear of the intermediate rotating shaft 212 caused by the deadweight and load of the auxiliary arm 22 to a certain extent, and extend the maintenance cycle of the folding arm crane. Example 2

[0027] Example 2 is based on Example 1, a high support stability folding arm crane, such as Figure 6 , Figure 7 As shown, the difference lies in that the damping plate 915 is not provided, and the distance between the two rotating support wheels 7 is adjustable, so that the distance between the two rotating support wheels 7 can be adjusted according to the actual situation of the folding arm crane, ensuring the best supporting effect for the foldable boom 2.

[0028] Specifically, the mounting plate 9 includes a fixed plate 91 and two movable plates 92, and the two rotating support wheels 7 are respectively mounted on the two movable plates 92. The movable plates 92 are hinged to the fixed plate 91 through hinges 922 and can rotate around the hinge point to change the distance between the two rotating support wheels 7. The bottom surface of the fixed plate 91 is provided with an adjustment mechanism for adjusting the distance between the two rotating support wheels 7, and the adjustment mechanism includes a fixed block 911, an adjustment screw 912, a movable block 914 and a transmission connecting rod 921. The fixed block 911 is fixedly installed on the bottom surface of the fixed plate 91; the adjusting screw 912 passes through the fixed block 911 in a direction perpendicular to the column 1 and the two are threadedly connected, and the adjusting screw 912 is generally located between the two rotating support wheels 7; the end of the adjusting screw 912 away from the rotating support ring 8 is fixed with a rotating block 913, and the end close to the rotating support ring 8 is rotatably connected with a movable block 914; one end of the transmission connecting rod 921 is hinged to the movable plate 92, and the other end is hinged to the movable block 914; there are two transmission connecting rods 921, which are used to drive the two movable plates 92 to rotate. Figure 7 When the distance between the two rotating support wheels 7 needs to be adjusted, the rotating block 913 drives the adjusting screw 912 to rotate, driving the movable block 914 to approach or move away from the rotating support ring 8, and then drives the movable plate 92 to rotate through the transmission connecting rod 921, thereby realizing the adjustment of the distance between the two rotating support wheels 7.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high support stability folding arm crane, comprising a column (1) and a foldable boom (2), wherein the foldable boom (2) is rotatably mounted on the top of the column (1), characterized in that: The foldable boom (2) is fixedly provided with a vertical support rod (5) and a plurality of diagonal support rods (6), wherein the vertical support rod (5) is parallel to the column (1); one end of the diagonal support rod (6) is fixed to the foldable boom (2), and the other end is fixed to an end of the vertical support rod (5) away from the foldable boom (2); the top end of the vertical support rod (5) is fixed to the foldable boom (2), and a pair of rotating support wheels (7) are provided at the bottom end; a rotating support ring (8) is coaxially fixedly provided on the column (1); the central axis of the rotating support wheel (7) is parallel to the central axis of the rotating support ring (8), and the circumferential side surface of the rotating support wheel (7) abuts against the circumferential side surface of the rotating support ring (8).

2. A high support stability folding arm crane according to claim 1, characterized in that: The radii of the two rotating support wheels (7) are respectively denoted as R1 and R2, and the diameter of the rotating support ring (8) is denoted as D. Then, the distance L between the central axes of the two rotating support wheels (7) satisfies the following relationship: R1+R2<L<D+R1+R2.

3. A high support stability folding arm crane according to claim 2, characterized in that: The diameters of the two rotating support wheels (7) are equal.

4. A high support stability folding arm crane according to any one of claims 1 to 3, characterized in that: A mounting plate (9) is fixedly provided at the bottom end of the vertical support rod (5), and the rotating support wheel (7) is rotatably mounted on the mounting plate (9).

5. A high support stability folding arm crane according to claim 4, characterized in that: The mounting plate (9) comprises a fixed plate (91) fixed to the vertical support rod (5) and two movable plates (92) rotatably connected to the fixed plate (91), and the two rotating support wheels (7) are respectively mounted on the two movable plates (92); the fixed plate (91) is provided with an adjustment mechanism for driving the movable plate (92) to rotate so as to adjust the distance between the two rotating support wheels (7).

6. A high support stability folding arm crane according to claim 5, characterized in that: The adjustment mechanism comprises a fixed block (911), an adjustment screw (912) and two transmission connecting rods (921); the fixed block (911) is fixedly arranged on the fixed plate (91) and an adjustment screw (912) is arranged on the fixed block (911) in a direction perpendicular to the length of the column (1), and the adjustment screw (912) and the fixed block (911) are threadedly connected; the adjustment screw (912) is provided with a rotatable movable block (914); one end of the transmission connecting rod (921) is rotatably connected to the movable block (914), and the other end is rotatably connected to the movable plate (92).

7. A high support stability folding arm crane according to claim 6, characterized in that: The fixing block (911), the adjusting screw rod (912) and the transmission connecting rod (921) are all arranged on the upper side or the lower side of the fixing plate (91).

8. The high support stability folding arm crane according to claim 6, characterized in that: A rotary block (913) is provided at one end of the adjusting screw rod (912) away from the column (1).

9. The high support stability folding arm crane according to claim 4, characterized in that: A damping plate (915) is provided on the mounting plate (9).

10. A high support stability folding arm crane according to claim 9, characterized in that: An L-shaped fixed end plate (916) is provided on the bottom surface of the mounting plate (9), a fixed shaft sleeve (917) is provided on the side of the L-shaped fixed end plate (916) facing the column (1), a connecting rod (918) is coaxially inserted in the fixed shaft sleeve (917), and the damping plate (915) is fixed to one end of the connecting rod (918) facing the column (1).

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