Bidirectional folding connecting structure of arm support

Abstract

The utility model discloses a bidirectional folding connecting structure for arm supports, and particularly relates to a connecting structure, which comprises a first arm support, a second arm support, a third arm support and a fourth arm support, a second hinging piece is fixedly arranged on the second arm frame; and the connecting pieces are respectively hinged with the first hinging piece and the second hinging piece. According to the two-way folding connecting structure for the arm frame, the clamping blocks which are symmetrically arranged are pressed, so that the clamping blocks enter the plug pin blocks, the plug pin blocks are driven to be separated from the second hinge piece, rotary locking between the second hinge piece and the connecting piece is relieved, and therefore the first arm frame and the second arm frame can be folded in the horizontal plane; according to the cantilever crane, multi-direction folding can be achieved, the pin shafts do not need to be repeatedly disassembled and assembled, operation is convenient, the folding efficiency is improved, and the situation that the connecting positions of the pin shafts are loosened due to repeated disassembly of the pin shafts, and consequently the stability of the cantilever crane is affected can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to a connection structure, in particular to a boom bidirectional folding connection structure. Background Art

[0002] The boom is the part of a quick-erecting crane, and the boom of a crane is usually designed as a folding boom for easy transportation and assembly.

[0003] Publication number CN208200209U, publication date 20181207, discloses a boom bidirectional folding connection structure and its lifting equipment, including a first boom, a connecting piece and a second boom, wherein a first pin hole, a second pin hole and a third pin hole are arranged at the upper end of the first boom, the first pin hole is arranged perpendicular to the first boom, the second pin hole and the third pin hole are parallel to the first boom and are relatively arranged at both side ends of the first boom, the first pin hole and the pin hole at one end of the pulling frame are hingedly connected to the pin hole at one end of the pulling frame through a first pin shaft, the pin hole at the other end of the pulling frame is hingedly connected to the first connecting ear longitudinally arranged on the connecting piece through a second pin shaft, and the fourth connecting ear on the connecting piece is hingedly connected to the third pin shaft at the upper end of the second boom; the connecting piece is provided with a second connecting ear and a third connecting ear on both side ends along the length direction of the boom, and the second connecting ear and the third connecting ear are respectively hingedly connected to the second pin hole and the third pin hole through a fourth pin shaft and a fifth pin shaft respectively.

[0004] In the prior art including the above-mentioned patent, by knocking out the fourth pin corresponding to the second connecting ear, then knocking out the second pin in the shaft sleeve of the third connecting ear, and pressing the movable end of the pull frame to the chord on the first arm, the second arm is flipped laterally around the fifth pin to achieve horizontal folding. However, the pin needs to be disassembled repeatedly, which can easily loosen the pin and the pin hole, affecting the stability of the arm. Utility Model Content

[0005] The utility model aims to provide a two-way folding connection structure of an arm, which is used to solve the technical problem in the prior art that the pin shaft is repeatedly disassembled, which easily causes the pin shaft and the pin hole to loosen and affects the stability of the arm shaft.

[0006] In order to achieve the above object, the utility model provides the following technical solution: a boom bidirectional folding connection structure, comprising:

[0007] A first arm, on which a first hinged member is fixedly disposed;

[0008] A second arm bracket, on which a second hinged member is fixedly disposed;

[0009] Also includes a connecting member hingedly connected to the first hinge member and the second hinge member respectively;

[0010] It also includes a latch block slidably arranged in the connecting member, which cooperates with the latch of the second hinged member, and a clamping block for locking the rotation of the second hinged member is slidably arranged in the latch block.

[0011] Preferably, the invention further comprises a threaded rod coupled with the connecting member, which is rotatably arranged on the latch block, and a knob is fixedly arranged on the threaded rod.

[0012] Preferably, the invention further comprises a reinforcing support member slidably disposed on the first hinge member.

[0013] Preferably, the invention further comprises a rack which is slidably arranged in the first hinge, and a fixed shaft is fixedly connected between the rack and the reinforcing support member.

[0014] Preferably, the invention further comprises a sliding block slidably disposed in the first hinge, on which a tooth groove is provided.

[0015] Preferably, it also includes a gear rotatably arranged in the first hinge, which is respectively meshed and connected with the rack and the tooth groove.

[0016] In the above technical scheme, the utility model provides a bidirectional folding connection structure of an arm, which has the following beneficial effects: when folding in the horizontal direction is required, after completing the folding of the vertical plane, first press the symmetrically arranged card block so that the card block enters the latch block, thereby driving the latch block to disengage from the second hinge, thereby releasing the rotation lock between the second hinge and the connecting member, so that the first arm and the second arm can be folded in the horizontal plane, which not only can realize multi-directional folding, but also does not require repeated disassembly and installation of the pin shaft, which is not only convenient to operate and improves the folding efficiency, but also can effectively avoid repeated disassembly of the pin shaft to cause the pin shaft connection to loosen, thereby affecting the stability of the arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of a three-dimensional structure in which a first boom and a second boom are deployed is provided for an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of a three-dimensional structure of a first arm and a second arm folded in a vertical plane provided by an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of a three-dimensional structure of a first arm and a second arm folded in a horizontal plane provided by an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of a cross-sectional structure of a second hinged member provided in an embodiment of the utility model;

[0022] Figure 5 A schematic diagram of the matching structure of the latch block and the card slot provided in an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the side cross-sectional structure of the first boom and the second boom provided in an embodiment of the utility model when they are unfolded;

[0024] Figure 7 This is an enlarged schematic diagram of structure A provided in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. First arm; 11. First hinge; 111. Strengthening support; 112. Sliding block; 1121. First spring; 1122. Tooth groove; 113. Gear; 114. Rack; 115. Fixed shaft; 2. Second arm; 21. Second hinge; 211. First rotating member; 212. Slot; 3. Connecting member; 31. Knob; 32. Second rotating member; 33. Latch block; 331. Slot; 332. Second spring; 34. Threaded rod; 35. Slot. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-7 As shown, a boom bidirectional folding connection structure comprises:

[0029] A first arm 1, on which a first hinge 11 is fixedly arranged;

[0030] A second arm 2, on which a second hinge 21 is fixedly disposed;

[0031] It also includes a connecting member 3 which is hingedly connected to the first hinge member 11 and the second hinge member 21 respectively;

[0032] It also includes a latch block 33 slidably disposed in the connecting member 3, which is latched with the second hinged member 21, and a clamping block 331 is slidably disposed in the latch block 33 to lock the rotation of the second hinged member 21.

[0033] Specifically, when the vertical plane needs to be folded, the second arm 2 only needs to be moved as follows: Figure 2The folding can be performed in the state shown, by hingedly connecting the second rotating member 32 fixedly arranged on the connecting member 3 with the first hinge 11, so that the connecting member 3 is rotatably arranged on the first hinge 11. When folding, the second arm 2 is rotated, and the connecting member 3 is driven to rotate around the first hinge 11 through the second hinge 21 on the second arm 2, thereby completing the folding of the first hinge 11 and the second hinge 21, thereby completing the folding of the first arm 1 and the second arm 2 in the vertical plane.

[0034] Furthermore, when folding in the horizontal direction is required, after the folding in the vertical plane is completed, the symmetrically arranged card block 331 is pressed first, so that the card block 331 enters the latch block 33, and squeezes the second spring 332, thereby driving the latch block 33 to disengage from the card slot 212 provided on the second hinge 21, thereby releasing the rotation lock between the second hinge 21 and the connecting member 3, and since the first rotating member 211 fixedly arranged on the second hinge 21 is hinged, the second hinge 21 is folded with the connecting member 3 through the first rotating member 211, thereby completing the folding of the first arm 1 and the second arm 2 in the horizontal plane, as shown in FIG. Figure 3 As shown, not only can multi-directional folding be achieved, but there is no need to repeatedly disassemble and install the pin shaft. This is not only convenient to operate and improves the folding efficiency, but also can effectively avoid the repeated disassembly of the pin shaft causing the pin shaft connection to become loose, thereby affecting the stability of the arm frame.

[0035] In the above technology, when folding in the horizontal direction is required, after completing the folding in the vertical plane, first press the symmetrically arranged block 331 so that the block 331 enters the latch block 33, thereby driving the latch block 33 to disengage from the second hinge 21, thereby releasing the rotation lock between the second hinge 21 and the connecting member 3, so that the first arm 1 and the second arm 2 can be folded in the horizontal plane, which not only can realize multi-directional folding, but also does not require repeated disassembly and installation of the pin shaft, which is not only convenient to operate and improves the folding efficiency, but also can effectively avoid the repeated disassembly of the pin shaft to cause the pin shaft connection to loosen, thereby affecting the stability of the arm.

[0036] As a further embodiment of the present invention, the present invention further comprises a threaded rod 34 coupled with the connecting member 3 , which is rotatably arranged on the latch block 33 , and a knob 31 is fixedly arranged on the threaded rod 34 .

[0037] Specifically, when folding in the horizontal direction is required, after completing the folding of the vertical plane, first press the symmetrically arranged block 331, so that the block 331 enters the latch block 33 and squeezes the second spring 332. By rotating the knob 31, the threaded rod 34 is driven to rotate. Since the threaded rod 34 is coupled to the connecting member 3, the knob 31 moves away from the connecting member 3, thereby driving the latch block 33 to re-enter the sliding groove 35 provided on the connecting member 3, thereby releasing the rotation lock between the second hinge 21 and the connecting member 3. Compared with the repeated disassembly of the pin shaft, it is more convenient and quick, and the efficiency is improved.

[0038] As a further embodiment provided by the present invention, it further comprises a reinforcing support member 111 slidably disposed on the first hinge member 11 .

[0039] Specifically, when the boom needs to be moved as follows Figure 1 The state shown is unfolded, driving the reinforcing support member 111 to move, so that the reinforcing support member 111 is located at the gap between the first arm 1 and the second arm 2, thereby improving the supporting strength at the gap between the first arm 1 and the second arm 2.

[0040] As a further embodiment of the present invention, the present invention further comprises a rack 114 slidably disposed in the first hinge 11 , and a fixed shaft 115 is fixedly connected between the rack 114 and the reinforcing support 111 .

[0041] Specifically, it also includes a slider 112 slidably disposed in the first hinge 11, on which a tooth groove 1122 is provided. It also includes a gear 113 rotatably disposed in the first hinge 11, which is meshed and connected with the rack 114 and the tooth groove 1122 respectively. During the unfolding process of the first boom 1 and the second boom 2, the second hinge 21 on the second boom 2 pushes the slider 112 slidably disposed on the first hinge 11 to move, and compresses the first spring 1121, thereby driving the gear 113 to rotate through the tooth groove 1122 provided on the slider 112, thereby driving the rack 114 to move in the direction opposite to the moving direction of the slider 112, thereby driving the reinforcing support 111 to move through the fixed shaft 115, and no additional driving source is required to drive the reinforcing support 111 to move, thereby simplifying the structure and saving costs.

[0042] Working principle: When the vertical plane needs to be folded, just move the second arm 2 as follows Figure 2The folding of the first and second arms 1 and 2 is completed in the vertical plane. When folding, the second arm 2 is rotated, and the second hinge 21 on the second arm 2 drives the connecting member 3 to rotate around the first hinge 11, thereby completing the folding of the first hinge 11 and the second hinge 21, thereby completing the folding of the first arm 1 and the second arm 2 in the vertical plane. When folding in the horizontal direction is required, after completing the folding of the vertical plane, the symmetrically arranged card block 331 is pressed first, so that the card block 331 enters the latch block 33 and squeezes the second spring 332. By rotating the knob 31, the threaded rod 34 is driven to rotate. Since the threaded rod 34 is coupled to the connecting member 3, the knob 31 moves in a direction away from the connecting member 3, thereby driving the latch block 33 to re-enter the sliding groove 35 provided on the connecting member 3, thereby releasing the second hinge. The rotation lock between the part 21 and the connecting part 3 is achieved. Since the first rotating part 211 fixedly arranged on the second hinged part 21 is hinged, the second hinged part 21 is folded through the first rotating part 211 and the connecting part 3, thereby completing the folding of the first arm 1 and the second arm 2 in the horizontal plane. During the unfolding process of the first arm 1 and the second arm 2, the second hinged part 21 on the second arm 2 pushes the slider 112 slidingly arranged on the first hinged part 11 to move, and squeezes the first spring 1121, thereby driving the gear 113 to rotate through the tooth groove 1122 opened on the slider 112, thereby driving the rack 114 to move in the direction opposite to the moving direction of the slider 112, thereby driving the reinforcing support member 111 to move through the fixed shaft 115, and no additional driving source is required to drive the reinforcing support member 111 to move, so that the reinforcing support member 111 is located in the gap between the first arm 1 and the second arm 2, thereby improving the supporting strength at the gap between the first arm 1 and the second arm 2.

[0043] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A two-way folding connection structure of an arm, characterized in that: include: A first arm (1) on which a first hinged member (11) is fixedly arranged; A second arm (2) on which a second hinged member (21) is fixedly arranged; It also includes a connecting member (3) hingedly connected to the first hinge member (11) and the second hinge member (21) respectively; It also includes a latch block (33) slidably arranged in the connecting member (3) and engaged with the latch of the second hinged member (21), and a locking block (331) is slidably arranged in the latch block (33) for locking the rotation of the second hinged member (21).

2. The boom bidirectional folding connection structure according to claim 1, characterized in that: It also comprises a threaded rod (34) coupled with the connecting member (3), which is rotatably arranged on the latch block (33), and a knob (31) is fixedly arranged on the threaded rod (34).

3. The boom bidirectional folding connection structure according to claim 1, characterized in that: It also includes a reinforcing support member (111) slidably arranged on the first hinge member (11).

4. The arm bidirectional folding connection structure according to claim 3, characterized in that: It also comprises a rack (114) slidably arranged in the first hinged member (11), and a fixed shaft (115) is fixedly connected between the rack and the reinforcing support member (111).

5. The boom bidirectional folding connection structure according to claim 1, characterized in that: It also comprises a sliding block (112) slidably arranged in the first hinged member (11) and having a tooth groove (1122) formed thereon.

6. The boom bidirectional folding connection structure according to claim 5, characterized in that: It also includes a gear (113) rotatably arranged in the first hinged member (11), which is meshedly connected with the rack (114) and the tooth groove (1122) respectively.

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