Chain joint mounting device and aerial work platform

Abstract

The utility model discloses a chain joint mounting device, and relates to the technical field of telescopic booms, a joint mounting seat is fixedly assembled on the outer surface of a boom, one end of a chain joint is provided with a hinge joint for connecting a chain, and the other end of the chain joint is provided with an expanded bump; the clamping notch is formed in the connector installation base, the chain connector is embedded into the clamping notch, the width of the expansion protruding block is larger than that of the clamping notch, and therefore the expansion protruding block can make contact with the connector installation base to form blocking, and the chain connector can be prevented from being separated from the connector installation base. The chain joint is not directly welded with the outer surface of the arm support, but adopts a limiting form of blocking and clamping by the expanded convex block, and the chain joint and the joint mounting seat do not need to be assembled by welding, so that quick assembly, quick disassembly and quick change of the chain joint can be realized, and the assembly process of the chain joint is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic arms, and further relates to a chain joint installation device and an aerial work platform. Background Art

[0002] With the development of economy and technology, aerial work platforms are increasingly used in various engineering operations. Spider-type aerial work platforms are a type of product with relatively high technical requirements among aerial work platforms. Their main function is to transport a certain number of operators and weight-limited tools to high altitudes for equipment installation, maintenance, cleaning, etc. It is mainly used in large shopping malls, which have high requirements for the stability, maintainability, passability and weight of the equipment. Due to the large number of application scenarios in large shopping malls, the weight of the spider car is required to be light. In order to reduce the weight as much as possible, the spider car boom generally adopts a polygonal cross-section form, the arm cross-section size is small, the arm plate thickness is very thin (generally 2-3mm), the gap between the arms is small, and the telescopic mechanism basically adopts a telescopic cylinder + chain rope system.

[0003] Currently, the most common cross-sectional shapes for spider booms on the market include quadrilateral, octagonal, heptagonal, and tetradecagonal. For quadrilateral and tetradecagonal booms, both sliders and chains are typically placed at the bottom of the boom tail. This arrangement is practically impossible to achieve using conventional threaded chain joints due to the spider boom's unique structure, thin arms, and small gaps between arms (which lack sufficient space for bolt placement).

[0004] like Figure 1 As shown, the chain joint 01 is usually designed to be directly welded to the arm surface 03, but this method has two major disadvantages. First, when the pin hole of the chain joint 01 is squeezed, it cannot be repaired; second, there are certain problems with the installation convenience and safety of this structure. The chain 02 and the chain joint 01 must be installed separately, which is cumbersome to install and the overall safety and reliability of the chain joint cannot be tested as a whole.

[0005] For those skilled in the art, how to achieve quick assembly, quick disassembly, and quick replacement of chain joints is a technical problem that needs to be solved at present. Utility Model Content

[0006] The core of this utility model is to provide a chain joint installation device. The chain joint and the joint mounting seat cooperate to realize the installation of the chain. The chain joint does not need to be welded to the arm, and can be quickly installed, quickly removed, and quickly replaced. The specific scheme is as follows:

[0007] A chain joint installation device comprises a chain joint and a joint installation seat; the joint installation seat is fixedly assembled on the outer surface of the arm;

[0008] One end of the chain joint is provided with a hinged joint for connecting the chain, and the other end is provided with an enlarged protrusion;

[0009] A clamping notch is provided on the joint mounting seat, the chain joint can be embedded in the clamping notch, and the width of the enlarged protrusion is greater than the width of the clamping notch.

[0010] Optionally, a stop notch is provided on the connector mounting seat, and the stop notch is used to clamp the enlarged protrusion;

[0011] A stopper is provided above the stop notch for preventing the enlarged protrusion from lifting upward.

[0012] Optionally, the thickness of the enlarged protrusion is smaller than the thickness of the chain joint, and when the enlarged protrusion contacts the stopper, the upper surface of the chain joint is flush with the upper surface of the joint mounting seat.

[0013] Optionally, the width of the chain joint is smaller than the width of the hinge joint and smaller than the width of the enlarged protrusion, and is used to limit the chain joint in the length direction.

[0014] Optionally, it further comprises a slider, wherein the slider is fixed to the outer surface of the arm;

[0015] The slider is used to prevent the chain joint from translating along the length direction.

[0016] Optionally, there is a predetermined distance between one end surface of the sliding block and the chain joint that is less than the movement length of the enlarged protrusion to separate from the stop block.

[0017] Optionally, a pressing groove for pressing the chain joint is provided on the sliding block to prevent the chain joint from lifting upward.

[0018] Optionally, two locking notches are provided on the joint mounting seat to match the two chain joints at the same time.

[0019] Optionally, a support block is provided on the outer surface of the arm, the other end of the chain is connected to the head joint, and the head joint is provided with an external thread section for cooperating with a locking nut to tighten the chain.

[0020] The utility model also provides an aerial work platform, comprising any one of the chain joint installation devices described above.

[0021] The utility model provides a chain joint installation device, wherein a joint mounting seat is fixedly mounted on the outer surface of an arm, a hinged joint for connecting a chain is provided at one end of the chain joint, and an enlarged protrusion is provided at the other end; a snap-in notch is provided on the joint mounting seat, and the chain joint is inserted into the snap-in notch, and the width of the enlarged protrusion is greater than the width of the snap-in notch, so that the enlarged protrusion contacts the joint mounting seat to form a blockage, which can prevent the chain joint from separating from the joint mounting seat. The chain joint of the utility model is not directly welded to the outer surface of the arm, but adopts a limiting form of an enlarged protrusion blocking the snap connection. The chain joint and the joint mounting seat do not need to be assembled by welding, so the chain joint can be quickly installed, quickly disassembled, and quickly replaced, simplifying the assembly process of the chain joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the fixing of the existing chain joint;

[0024] Figure 2 This is an axonometric drawing of the chain joint of the utility model;

[0025] Figure 3 for Figure 2 Front view of the middle chain joint;

[0026] Figure 4 for Figure 2 Side view of the middle chain joint;

[0027] Figure 5 This is an axonometric drawing of the second chain joint of the present utility model;

[0028] Figure 6 This is an axonometric drawing of the connector mounting base of the present invention;

[0029] Figure 7 A top view of the chain joint assembled on the joint mounting base;

[0030] Figure 8 for Figure 7 Cross-section view in the AA direction;

[0031] Figure 9 for Figure 7 Cross-section in the middle BB direction;

[0032] Figure 10This is a front cross-sectional view of the chain joint mounting device of the present invention assembled on the boom;

[0033] Figure 11 It is a side sectional view of the chain joint mounting device of the present invention assembled on the boom;

[0034] Figure 12 Schematic diagram of the step-by-step assembly of the joint mounting base, chain joint, and slider;

[0035] Figure 13 for Figure 12 A partial enlarged view of the circled part.

[0036] The diagram includes:

[0037] Chain joint 1, hinged joint 11, hinge hole 111, enlarged protrusion 12, joint mounting seat 2, clamping notch 21, stop notch 22, stop block 23, slider 3, arm 4, support block 41, head joint 42, locking nut 43, chain 5. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the chain joint installation device of the present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0039] The utility model provides a chain joint mounting device, comprising a chain joint 1 and a joint mounting base 2. The chain joint 1 and the joint mounting base 2 are two independent components. The joint mounting base 2 is fixedly mounted on the outer surface of the arm frame 4. The joint mounting base 2 can be welded or bolted to the outer surface of the arm frame 4 to achieve fixed assembly of the joint mounting base 2.

[0040] The chain joint 1 is used to connect with the chain 5. One end of the chain joint 1 is provided with a hinge joint 11 for connecting with the chain 5, and the other end is provided with an enlarged protrusion 12; Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, a hinge joint 11 and an enlarged protrusion 12 are respectively provided at both ends of the chain joint 1 in the length direction, and a hinge hole 111 is provided through the hinge joint 11, and the hinge joint 11 is provided with a plurality of cantilever structures for interlacing, overlapping and interlacing with the cantilever structures on the chain 5, and a pin shaft is passed through the hinge hole 111 to enable the chain 5 and the hinge joint 11 to be hingedly assembled with each other.

[0041] The enlarged protrusion 12 forms a portion with increased width at one end of the chain connector 1 . The enlarged protrusion 12 may be a rectangular parallelepiped structure, or may be in a wedge-shaped, dovetail-shaped, or other external shape.

[0042] Combine Figure 6As shown, the connector mounting base 2 is provided with a clamping notch 21, which is a concave groove surrounded by three sides. The main body of the chain connector 1 has a similar outer size to the clamping notch 21, and the size of the clamping notch 21 is slightly larger than the main body of the chain connector 1. The chain connector 1 can be inserted into the clamping notch 21, and the three sides of the chain connector 1 can contact the clamping notch 21. The main body of the chain connector 1 can be a rectangular parallelepiped (such as Figure 2 ), or it can be a trapezoid (as Figure 5 As shown), other shapes are also possible, requiring the clamping notch 21 to be compatible with the shape of the chain connector 1.

[0043] The width of the enlarged protrusion 12 is greater than the width of the locking notch 21, and the enlarged protrusion 12 cannot enter the locking notch 21. The enlarged protrusion 12 and the hinge head 11 are respectively located at both ends of the locking notch 21. When the main part of the chain joint 1 is embedded in the locking notch 21, the enlarged protrusion 12 and the hinge head 11 are both located outside the locking notch 21.

[0044] During assembly, the joint mounting base 2 is fixed to the outer surface of the arm 4, and the chain joint 1 is installed on the chain 5. The chain joint 1 is locked in the locking notch 21, and the enlarged protrusion 12 and the chain 5 are respectively located on both sides of the locking notch 21. When the chain 5 is tensioned, the enlarged protrusion 12 cannot pass through the locking notch 21, thereby limiting the position of the chain 5. With the chain joint mounting device of the present invention, the chain joint 1 does not need to be fixed to the outer surface of the arm 4, and no additional fixing structure is required, allowing for rapid installation, removal, and replacement of the chain.

[0045] On the basis of the above scheme, in order to further realize the limit, a stop groove 22 is set on the connector mounting seat 2. The stop groove 22 is located at one end of the through direction of the clamping notch 21. The width of the stop groove 22 is greater than the width of the clamping notch 21. The stop groove 22 is used to clamp the enlarged protrusion 12, and the enlarged protrusion 12 can be clamped and embedded in the stop groove 22.

[0046] Stoppers 23 are positioned above the stop notch 22 to prevent the enlarged protrusion 12 from lifting upward. These stoppers 23 press against the left and right edges of the enlarged protrusion 12, limiting the upward limit of the enlarged protrusion 12. Generally, when the enlarged protrusion 12 is engaged with the stop notch 22, the upper surface of the enlarged protrusion 12 contacts the lower surface of the stoppers 23, and the upper surface of the joint mounting base 2 is flush with the upper surface of the chain joint 1.

[0047] Combine Figure 7As shown in the figure, the installation process of the chain joint 1 is shown from left to right. When the chain joint 1 is placed in the locking notch 21, the enlarged protrusion 12 is located outside the joint mounting seat 2 when viewed from above, so that the main part of the chain joint 1 is exactly opposite the locking notch 21. The chain joint 1 is locked and inserted into the locking notch 21. Next, the chain joint 1 is moved horizontally toward the hinged joint 11 ( Figure 7 The chain 5 applies a pulling force in this direction to the chain joint 1, so that the enlarged protrusion 12 is embedded in the stop groove 22. At this time, the contact block 23 is located directly above the enlarged protrusion 12. The two contact blocks 23 block the enlarged protrusion 12, and the chain joint 1 cannot be lifted upward. As long as the chain joint 1 is tightened by the chain 5, the chain joint 1 cannot be separated from the joint mounting base 2. Figure 7 When the chain 5 applies positive tension to the chain joint 1 in the X-axis direction, the enlarged protrusion 12 contacts the sidewall of the joint mounting base 2 to limit the position. When the enlarged protrusion 12 enters the stop notch 22, the chain joint 1 is restrained in both directions along the Y-axis. This structure prevents both lateral and vertical translation of the chain joint 1 without requiring any additional fixing structure. To release the chain joint 1, simply release the tension on the chain 5, and the chain joint 1 can be detached from the joint mounting base 2.

[0048] Specifically, combined Figure 2 、 Figure 5 As shown, the thickness of the enlarged protrusion 12 is smaller than the thickness of the chain joint 1. When the upper surface of the enlarged protrusion 12 contacts the stopper 23, the upper surface of the chain joint 1 is flush with the upper surface of the joint mounting seat 2. At this time, the lower surface of the chain joint 1 contacts the joint mounting seat 2. There is only a small gap between the chain joint 1 and the joint mounting seat 2 in the thickness direction; and the left and right directions of the chain joint 1 and the clamping notch 21 ( Figure 7 The two ends of the chain joint 1 and the middle Y-axis are in contact with each other with only a small gap, thereby reducing the shaking of the chain joint 1 relative to the joint mounting base 2.

[0049] Combine Figure 2 、 Figure 5 As shown, the width of one end of the chain joint 1 provided with the hinge 11 is smaller than the width of the hinge 11, and the width of one end of the chain joint 1 provided with the enlarged protrusion 12 is smaller than the width of the enlarged protrusion 12, that is, the hinge 11 forms an enlarged portion at one end of the chain joint 1, and the enlarged protrusion 12 forms an enlarged portion at the other end of the chain joint 1. When the chain joint 1 is inserted into the locking notch 21, it is used to limit the chain joint 1 in the length direction, that is, the chain joint 1 is Figure 7 The translation range in the X-axis direction is limited by the hinge joint 11 and the enlarged protrusion 12.

[0050] Combine Figure 7As shown, the distance between the hinge joint 11 and the enlarged protrusion 12 on the chain joint 1 is L, and the width of the joint mounting seat 2 is D. It should be ensured that L>D. When the chain joint 1 is inserted into the locking notch 21 and moves from top to bottom, the enlarged protrusion 12 is located outside the joint mounting seat 2. At this time, the hinge joint 11 is also located outside the joint mounting seat 2 to avoid interference between the enlarged protrusion 12 and the hinge joint 11.

[0051] In addition, combined Figure 8 、 Figure 9 As shown, the thickness of the hinge joint 11 and the enlarged protrusion 12 can be greater than the thickness of the chain joint 1, and the lower surface of the hinge joint 11 and the lower surface of the enlarged protrusion 12 are flush with the lower surface of the joint mounting base 2, thereby contacting the surface of the arm 4. The thickness of the hinge joint 11 and the enlarged protrusion 12 can also be equal to the thickness of the chain joint 1.

[0052] The chain joint installation device of the present invention further comprises a slider 3, which is fixed to the outer surface of the arm 4 and is combined with the Figure 10 As shown, a plurality of arms 4 are set therein, and the two arms 4 nested in each other can slide and translate relative to each other. The slider 3 is set on the outer surface of the inner arm 4 and can slide and translate relative to the outer arm 4. The support provided by the slider 3 can reduce the friction between the two adjacent arms 4. There is a predetermined distance between one end face of the slider 3 and the chain joint 1 that is less than the movement length of the enlarged protrusion 12 to disengage from the block 23. The slider 3 is used to prevent the chain joint 1 from translating along the length direction. The slider 3 and the chain 5 are respectively located on both sides of the joint mounting seat 2. When the chain joint 1 needs to be separated from the joint mounting seat 2, the chain joint 1 needs to translate toward the direction of the slider 3. When the slider 3 is installed on the arm 4, the distance between the side wall of the slider 3 and the end of the chain joint 1 is very small, which can prevent the chain joint 1 from translating. Therefore, the chain joint 1 cannot be separated from the joint mounting seat 2, as shown in FIG. Figure 7 As shown, the slider 3 can prevent the chain joint 1 from moving in the negative direction of the X axis. When the chain joint 1 needs to be removed, the slider 3 needs to be removed first.

[0053] Combine Figure 7 As shown in the figure on the right, when the chain joint 1 is in place, a portion of the left end of the chain joint 1 still extends out of the joint mounting base 2. Therefore, a pressure groove for pressing the chain joint 1 can be provided on the slider 3. The slider 3 is used to prevent the chain joint 1 from lifting upward. When the pressure groove is provided on the slider 3, the stopper 23 on the joint mounting base 2 is unnecessary.

[0054] Combine Figure 6 、 Figure 7As shown, the connector mounting base 2 is provided with two locking notches 21. The two locking notches 21 can simultaneously match two chain connectors 1 and simultaneously lock and position two chains 5. Only one connector mounting base 2 needs to be fixed. If each connector mounting base 2 is respectively installed with a chain connector 1, two connector mounting bases 2 need to be installed at the same time.

[0055] Combine Figure 11 As shown, a support block 41 is provided on the outer surface of the arm 4. The support block 41 and the joint mounting base 2 are respectively located at the two ends of the same arm 4. The other end of the chain 5 is connected to the head joint 42. The head joint 42 is provided with an external thread section for cooperating with a locking nut 43 for tensioning the chain 5. By tightening the head joint 42, the chain 5 can be tensioned and the chain joint 1 and the joint mounting base 2 can be tensioned and positioned.

[0056] The utility model also provides an aerial work platform, which includes the above-mentioned chain joint installation device, and the aerial work platform can achieve the above-mentioned technical effects.

[0057] Combine Figure 12 As shown, when assembling the chain joint installation device, first fix the joint mounting seat 2 to the outer surface of the arm 4, and connect the chain joint 1 to the end of the chain 5. The chain joint 1 is clamped into the joint mounting seat 2, so that the chain joint 1 is clamped into the clamping notch 21, and the enlarged protrusion 12 enters the stop groove 22. The enlarged protrusion 12 is limited by the stop block 23. Then, the slider 3 is fixed to the outer surface of the arm 4, as shown in FIG. Figure 13 As shown, the end of the slider 3 is close to the chain joint 1, which can prevent the chain joint 1 from moving in translation. At this time, the chain joint 1 is limited in translation in three dimensions, and the chain joint 1 cannot be separated from the joint mounting base 2. Afterwards, by tightening the head joint 42, a tensioning force can be applied to the other end of the chain 5, thereby tensioning the chain 5.

[0058] This new structure has good process performance, high structural strength, compact structure, simple installation and easy disassembly. The joint mounting base and chain joint adopt a structure similar to mortise and tenon joints, which can realize quick disassembly and installation of the chain. It can effectively solve the problem of small gaps between arms and difficulty in installing chain joints.

[0059] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chain joint installation device, characterized in that: It comprises a chain joint (1) and a joint mounting seat (2); the joint mounting seat (2) is fixedly assembled on the outer surface of the arm (4); One end of the chain joint (1) is provided with a hinge joint (11) for connecting to the chain (5), and the other end is provided with an enlarged protrusion (12); A locking notch (21) is provided on the connector mounting seat (2), the chain connector (1) can be embedded in the locking notch (21), and the width of the enlarged protrusion (12) is greater than the width of the locking notch (21).

2. The chain joint installation device according to claim 1, characterized in that: A stop notch (22) is provided on the joint mounting seat (2), and the stop notch (22) is used for clamping the enlarged protrusion (12); A stopper (23) is provided above the stop notch (22) for preventing the enlarged protrusion (12) from lifting upward.

3. The chain joint installation device according to claim 2, characterized in that: The thickness of the enlarged protrusion (12) is smaller than the thickness of the chain joint (1), and when the enlarged protrusion (12) contacts the stopper (23), the upper surface of the chain joint (1) is flush with the upper surface of the joint mounting seat (2).

4. The chain joint installation device according to claim 2, characterized in that: The width of the chain joint (1) is smaller than the width of the hinge joint (11), and smaller than the width of the enlarged protrusion (12), and is used to limit the chain joint (1) in the length direction.

5. The chain joint installation device according to claim 3 or 4, characterized in that: It also includes a slider (3), the slider (3) being fixed to the outer surface of the arm (4); The slider (3) is used to prevent the chain joint (1) from translating along the length direction.

6. The chain joint installation device according to claim 5, characterized in that: There is a predetermined distance between one end surface of the slider (3) and the chain joint (1), which is less than the movement length of the enlarged protrusion (12) when it separates from the stopper (23).

7. The chain joint installation device according to claim 5, characterized in that: The slider (3) is provided with a pressing groove for pressing the chain joint (1), and is used to prevent the chain joint (1) from being lifted upward.

8. The chain joint installation device according to any one of claims 1 to 4, characterized in that: Two locking notches (21) are provided on the joint mounting seat (2) and are matched with the two chain joints (1) at the same time.

9. The chain joint installation device according to any one of claims 1 to 4, characterized in that: A support block (41) is provided on the outer surface of the arm (4), and the other end of the chain (5) is connected to a head joint (42). The head joint (42) is provided with an external thread section for cooperating with a locking nut (43) to tighten the chain (5).

10. An aerial work platform, characterized in that: The invention comprises a chain joint mounting device according to any one of claims 1 to 9.

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