Pin pulling mechanism and pin pulling device assembly with double pin pulling plates

Abstract

The utility model belongs to the technical field of engineering machinery and provides a pin pulling mechanism and a pin pulling device assembly with double pin pulling plates, and the pin pulling mechanism comprises a threaded pull rod, a left-handed sleeve seat and a right-handed sleeve seat, each of the left-handed sleeve seat and the right-handed sleeve seat comprises a sleeve connecting part used for being in threaded sleeving fit with the threaded pull rod and a limiting connecting part used for being in limiting fit with the pin pulling plate, the limiting connecting parts are located on the radial sides of the sleeve connecting parts, and the thread directions of the sleeve connecting parts of the left-handed sleeve seat and the right-handed sleeve seat are opposite. According to the pin pulling mechanism, the assembly positions of the threaded pull rod, the limiting connecting part of the left-handed sleeve seat and the limiting connecting part of the right-handed sleeve seat are axially staggered, so that the assembly position of the threaded pull rod can be positioned on the side of the pin pulling plates, and the pin pulling mechanism can be smoothly mounted when the distance between the pin pulling plates on the two sides is small.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and particularly relates to a pin pulling mechanism and a pin pulling device assembly with double pin pulling plates. Background Art

[0002] The telescopic booms of large-tonnage cranes typically utilize single-cylinder latch technology. This technology utilizes a telescopic cylinder with one end fixed to the lower end of the base boom and a latch mechanism at the other end. This latch mechanism is connected to the target boom to be extended, thereby driving the target boom and its internal boom sections to extend. Latch mechanisms are generally available in two connection types: a top single-arm latch and a side double-arm latch. Insertion and removal of the boom pin typically require the use of a pull plate and pull screw within the pin insertion and extraction mechanism. Installation and removal of the pull screw and boom pin require the use of the pull mechanism.

[0003] like Figure 1 As shown, the existing pin extraction mechanism for a double-arm pin insertion and extraction device generally includes a middle round rod 01 and screw rods 02 screwed to both ends of the middle round rod. The ends of screw rod 02 are provided with limit plates 04 for engaging with pin extraction plates 03. By driving the middle round rod 01 to rotate relative to the screw rods 02 at both ends, the pin extraction plates 03 on both sides can be pushed outward or pulled inward, and the pin extraction plates 03 and the pin extraction screw 06 can be driven to rotate, thereby driving the pin extraction screw 06 in and out of the extraction hole on the arm pin. Because the middle round rod 01, screw rod 02 and limit plates 04 are located on the same axis, the overall length of the pin extraction mechanism after assembly is relatively long. If the distance between the two pin extraction plates 03 is small, the pin extraction mechanism is difficult to install. Utility Model Content

[0004] In response to the above-mentioned defects or shortcomings, the present invention provides a pin pulling mechanism and a pin pulling device assembly with double pin pulling plates, aiming to solve the technical problem that the pin pulling mechanism of the existing pin pulling device assembly with double pin pulling plates is difficult to install when the distance between the two pin pulling plates is small.

[0005] To achieve the above-mentioned purpose, the utility model provides a pin pulling mechanism, which includes a threaded pull rod, a left-handed sleeve seat and a right-handed sleeve seat. The left-handed sleeve seat and the right-handed sleeve seat both include a sleeve connecting part for threadedly engaging with the threaded pull rod and a limiting connecting part for limiting engaging with the pin pulling plate. The limiting connecting part is located on the radial side of the sleeve connecting part, wherein the thread directions of the sleeve connecting parts of the left-handed sleeve seat and the right-handed sleeve seat are opposite.

[0006] In an embodiment of the present utility model, the position-limiting connection portion is detachably fixedly connected to the pin-pulling plate via a connecting piece.

[0007] In an embodiment of the present utility model, a clamping cavity is provided on the limit connection part. The clamping cavity is used for the insertion and clamping of the pin pulling plate. The pin pulling mechanism further includes a connecting piece, and the connecting piece is used for fixedly connecting the limit connection part and the pin pulling plate.

[0008] In an embodiment of the present utility model, the clamping cavity is arranged in a U shape and is provided with a U-shaped opening. The opening direction of the U-shaped opening is perpendicular to the axial direction. The clamping cavity is used for clamping the pin pulling plate from the side of the pin pulling plate, and the connecting piece is used for connecting the cavity wall of the clamping cavity and the pin pulling plate in series.

[0009] In an embodiment of the present utility model, the connecting piece is a spring bolt.

[0010] In an embodiment of the present utility model, a through hole radially penetrating is provided on the threaded pull rod. The pin pulling mechanism further includes a torsion rod, and the torsion rod is arranged in the through hole and is perpendicular to the threaded pull rod.

[0011] In an embodiment of the present utility model, the through hole is a cross hole.

[0012] To achieve the above object, the present utility model further provides a pin pulling device assembly with a double pin pulling plate. The pin pulling device assembly with a double pin pulling plate includes a left pin pulling plate, a right pin pulling plate, and the pin pulling mechanism described above. The left pin pulling plate and the right pin pulling plate are respectively detachably and fixedly connected to the left-handed sleeve seat and the right-handed sleeve seat on the corresponding side.

[0013] In an embodiment of the present utility model, the left pin pulling plate and the right pin pulling plate are respectively provided with clamping tongue eaves. Clamping cavities are provided on both the left-handed sleeve seat and the right-handed sleeve seat. The clamping tongue eaves are used for insertion and limit clamping in the corresponding clamping cavities.

[0014] In an embodiment of the present utility model, an arched cavity is provided on the clamping tongue eaves. The arched cavity penetrates the clamping tongue eaves along the width direction of the clamping tongue eaves. The clamping cavity is arranged in a U shape and is provided with a U-shaped opening. The clamping cavity clamps the clamping tongue eaves along the penetrating direction of the arched cavity, and one side cavity wall of the clamping cavity is located in the arched cavity.

[0015] Through the above technical solutions, the pin pulling mechanism provided by the embodiment of the present utility model has the following beneficial effects:

[0016] When the double pull pin plate is installed, first screw the left-handed sleeve seat and the right-handed sleeve seat onto the threaded tie rod and adjust the distance between them to an appropriate value. After the distance between the left-handed sleeve seat and the right-handed sleeve seat is adjusted to an appropriate value, connect the left-handed sleeve seat and the right-handed sleeve seat to the corresponding side of the pull pin plate in a limiting manner respectively. Then drive the threaded tie rod to rotate relative to the two sleeve seats, and the pull pin plates on both sides can be driven to approach or move away simultaneously in a mirror image manner. Since the limiting connection part is located on the radial side of the sleeve connection part, after the pull pin mechanism is assembled, the threaded tie rod, the limiting connection part of the left-handed sleeve seat, and the limiting connection part of the right-handed sleeve seat are axially staggered. Thus, after the pull pin mechanism is connected and fixed to the pull pin plate, the threaded tie rod is located on the side of the pull pin plate. At this time, even if the distance between the pull pin plates on both sides is small, the pull pin mechanism can be smoothly installed. In summary, by setting the assembly positions among the threaded tie rod, the limiting connection part of the left-handed sleeve seat, and the limiting connection part of the right-handed sleeve seat to be axially staggered, the pull pin mechanism of the present utility model can make the assembly position of the threaded tie rod be on the side of the pull pin plate, so that the pull pin mechanism can be smoothly installed even when the distance between the pull pin plates on both sides is small.

[0017] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0018] The drawings are used to provide an understanding of the present utility model and form a part of the specification. Together with the following specific implementation, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0019] Figure 1 is a schematic structural view of the pull pin mechanism in the background art cooperating with the pull pin plate;

[0020] Figure 2 is a schematic structural view of the pull pin device assembly with a double pull pin plate according to an embodiment of the present utility model;

[0021] Figure 3 is a schematic structural view of the pull pin mechanism from the first perspective according to an embodiment of the present utility model;

[0022] Figure 4 is a schematic structural view of the pull pin mechanism from the second perspective according to an embodiment of the present utility model.

[0023] Brief Description of the Drawings in the Background Art [[ID=,29]]

[0024] 01, intermediate round rod; 02, screw rod; 03, pull pin plate; 04, limiting plate; 05, dovetail groove; 06, pull pin screw rod.

[0025] Description of the Reference Numerals of the Present Utility Model

[0026] 1. Threaded tie rod; 21. Left-handed sleeve seat; 22. Right-handed sleeve seat; 23. Sleeve connection part; 24. Limit connection part; 241. Clamping cavity; 3. Connecting piece; 4. Torsion rod; 51. Left pin-pulling plate; 52. Right pin-pulling plate; 53. Clamping tongue eaves; 531. Arch cavity; 54. Pin-pulling installation hole. Detailed implementation mode

[0027] The following combines the drawings to detail the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] The pin-pulling mechanism of the present invention will be described below with reference to the drawings.

[0029] The present invention provides a pin-pulling mechanism, which is mainly applied to the installation of double pin-pulling plates, such as Figure 2 , Figure 3 and Figure 4 As shown, the pin-pulling mechanism includes:

[0030] Threaded tie rod 1, the threaded tie rod 1 can be a screw rod or only have threads at both axial ends;

[0031] Left-handed sleeve seat 21 and right-handed sleeve seat 22, both of which include a sleeve connection part 23 for threaded socketing cooperation with the threaded tie rod 1 and a limit connection part 24 for limit cooperation with the pin-pulling plate, and the limit connection part 24 is located on the radial side of the sleeve connection part 23;

[0032] Among them, the thread directions of the sleeve connection parts 23 of the left-handed sleeve seat 21 and the right-handed sleeve seat 22 are opposite. That is, one of the sleeve connection parts 23 of the left-handed sleeve seat 21 and the right-handed sleeve seat 22 is a left-handed thread, and the other is a right-handed thread.

[0033] During use, first install the pin-pulling screw on the corresponding pin-pulling plate, screw the left-handed sleeve seat 21 and the right-handed sleeve seat 22 onto the threaded pull rod 1, and adjust the distance between the two to be appropriate. After the distance between the left-handed sleeve seat 21 and the right-handed sleeve seat 22 is adjusted to be appropriate, respectively limit and connect the left-handed sleeve seat 21 and the right-handed sleeve seat 22 to the pin-pulling plates on the corresponding sides. Then align the pin-pulling screw with the pulling hole on the arm pin. At this time, drive the threaded pull rod 1 to rotate relative to the two sleeve seats, and it is possible to drive the pin-pulling plates and the pin-pulling screw on both sides to approach or move away simultaneously in a mirror image, and drive the pin-pulling plates and the pin-pulling screw to rotate. Since the limit connection part 24 is located on the radial side of the sleeve connection part 23, after the pin-pulling mechanism is assembled, the threaded pull rod 1, the limit connection part 24 of the left-handed sleeve seat 21, and the limit connection part 24 of the right-handed sleeve seat 22 are axially staggered. Thus, after the pin-pulling mechanism is fixedly connected to the pin-pulling plate, the threaded pull rod 1 is located on the side of the pin-pulling plate. At this time, even if the distance between the pin-pulling plates on both sides is small, the pin-pulling mechanism can be successfully installed. In summary, by setting the assembly positions between the threaded pull rod 1, the limit connection part 24 of the left-handed sleeve seat 21, and the limit connection part 24 of the right-handed sleeve seat 22 to be axially staggered, the pin-pulling mechanism of the present utility model can make the assembly position of the threaded pull rod 1 be located on the side of the pin-pulling plate, so that the pin-pulling mechanism can be successfully installed even when the distance between the pin-pulling plates on both sides is small.

[0034] In an embodiment of the present utility model, the sleeve connection part 23 and the limit connection part 24 can be connected together by means of welding, riveting, etc. The sleeve connection part 23 is provided with a threaded hole for threaded connection and cooperation with the threaded pull rod 1, and the threaded hole is preferably a through hole.

[0035] As Figure 1 shown, the matching form of the existing pin-pulling mechanism can only be adapted to the pin-pulling plate with a dovetail groove 05, and it cannot be matched with other forms of pin-pulling plates.

[0036] In order to increase the versatility of the pin-pulling mechanism, the matching form of the pin-pulling mechanism with the pin-pulling plate is also improved in this mechanism. As Figure 2 、 Figure 3 and Figure 4 shown, in an embodiment of the present utility model, the limit connection part 24 is detachably and fixedly connected to the pin-pulling plate through the connecting member 3. By setting the matching form between the limit connection part 24 and the pin-pulling plate to be detachably and fixedly connected through the connecting member 3, the limit fixation between the limit connection part 24 and various forms of pin-pulling plates can be realized, and the versatility of the pin-pulling mechanism is increased.

[0037] In order to increase the firmness and stability of the limit fixation between the limit connection part 24 and the pin-pulling plate, as Figure 2 、 Figure 3 and Figure 4As shown, in an embodiment of the present utility model, a clamping cavity 241 is provided on the limit connection part 24, and the clamping cavity 241 is used for the insertion and clamping of the pin pulling plate.

[0038] Specifically, as Figure 2 , Figure 3 and Figure 4 shown, in an embodiment of the present utility model, the clamping cavity 241 is arranged in a U shape and is provided with a U-shaped opening. The opening direction of the U-shaped opening is perpendicular to the axial direction. The clamping cavity 241 is used for clamping the pin pulling plate from the side of the pin pulling plate, and the connecting piece 3 is used for connecting the cavity walls of the clamping cavity 241 and the pin pulling plate in series. By setting the clamping cavity 241 to be U-shaped, it is convenient to clamp the pin pulling plate from the side of the pin pulling plate. And by connecting the cavity walls of the clamping cavity 241 and the pin pulling plate in series through the connecting piece 3, when the pin pulling plate is pulled out or pushed in, it can be avoided that the pin pulling plate falls from the U-shaped opening.

[0039] It can be understood that the pulling-out and pushing-in directions of the pin pulling plate are the same as the axial direction of the threaded pull rod 1. The end parts of the two pin pulling plates facing each other are the axial end parts, and the clamping direction of the clamping cavity 241 is perpendicular to the pulling-out and pushing-in directions of the pin pulling plate.

[0040] In an embodiment of the present utility model, the clamping cavity 241 can also be other shapes, such as a closed polygonal groove cavity, which is specifically set according to the shape of the pin pulling plate.

[0041] In an embodiment of the present utility model, the connecting piece 3 can be a spring pin. Through the spring pin, the stability of the connection between the limit connection part 24 and the pin pulling plate can be maintained, and it is convenient for disassembly. Of course, the connecting piece 3 can also be a threaded connecting piece such as a bolt or a screw.

[0042] As Figure 2 , Figure 3 and Figure 4 shown, in an embodiment of the present utility model, a radially penetrating through hole is provided on the threaded pull rod 1, and the pin pulling mechanism further includes a torsion rod 4. The torsion rod 4 is inserted into the through hole and is perpendicular to the threaded pull rod 1. The torsion rod 4 is used to form a cross-shaped rod frame with the threaded pull rod 1. By installing the torsion rod 4, it is convenient to drive the threaded pull rod 1 to rotate.

[0043] As Figure 2 , Figure 3 and Figure 4 shown, in an embodiment of the present utility model, the through hole can be a cross hole. When the torsion rod 4 drives the threaded pull rod 1 to rotate to certain angles, the torsion rod 4 may be interfered by the structural parts of the telescopic arm. By inserting the torsion rod 4 into another set of hole channels of the cross hole, the interference problem can be solved.

[0044] To achieve the above object, the present utility model further provides a pin pulling device assembly with double pin pulling plates, as Figure 2As shown, the pin pulling device assembly with double pin pulling plates includes a left pin pulling plate 51, a right pin pulling plate 52 and the pin pulling mechanism described above. The left pin pulling plate 51 and the right pin pulling plate 52 are respectively used to be detachably fixedly connected to the left-handed sleeve seat 21 and the right-handed sleeve seat 22 on the corresponding side.

[0045] In an embodiment of the present invention, the pin pulling device assembly with double pin pulling plates further comprises a pin pulling screw (not shown in the figure), which is used to be installed in the pin pulling installation hole 54 on the pin pulling plate on the corresponding side.

[0046] After the pin pulling screw and the pin pulling plate are assembled and screwed onto the arm pin, the pin pulling screw and the pin pulling plate are integrated, and the pin pulling plate is pushed and pulled by the driving member, thereby applying an axial movement force to the arm pin.

[0047] When the pinning screws on both sides need to be removed from the arm pin, the pinning mechanism is required because the pinning screws are tightly connected to the arm pin. When assembling the pinning mechanism, the left-hand sleeve seat 21 and the right-hand sleeve seat 22 need to be adjusted to a suitable spacing, and the left-hand sleeve seat 21 and the right-hand sleeve seat 22 need to be assembled and connected to the left pinning plate 51 and the right pinning plate 52 on the corresponding side respectively. By operating the torsion rod 4 to rotate the threaded pull rod 1, the left-hand sleeve seat 21 and the right-hand sleeve seat 22 can apply an axial pulling force to the left pinning plate 51 and the right pinning plate 52 respectively, and drive the pinning plate and the pinning screw to rotate relative to the arm pin, thereby realizing the removal of the pinning screw.

[0048] When it is necessary to install the pin pulling screws, the pin pulling screws can be first installed on the corresponding left pin pulling plate 51 and right pin pulling plate 52, and then the left-handed sleeve seat 21 and the right-handed sleeve seat 22 are screwed onto the threaded pull rod 1 and adjusted to a suitable spacing, and then the sleeve seat and the pin pulling plate are connected accordingly. After the pin pulling screws are aligned with the pin pulling holes on the arm pin, the threaded pull rod 1 is rotated by operating the torsion rod 4, which can cause the left-handed sleeve seat 21 and the right-handed sleeve seat 22 to pull the left pin pulling plate 51 and the right pin pulling plate 52 in directions away from each other, driving the pin pulling plate and the pin pulling screws to rotate relative to the arm pin, thereby screwing the pin pulling screws into the pin pulling holes of the arm pin.

[0049] When the pin pulling screw is installed or removed, the pin pulling mechanism is essentially a wrench tool that provides the torque for screwing in and out. When installing or removing the pin pulling plates, the pin pulling device assembly with double pin pulling plates of the present invention can achieve correct installation and removal even if the distance between the left pin pulling plate 51 and the right pin pulling plate 52 is small, because the threaded pull rod 1 and the pin pulling plates are axially offset.

[0050] like Figure 2As shown, in the embodiment of the present utility model, the left-handed sleeve seat 21 and the right-handed sleeve seat 22 are both provided with a clamping cavity 241. In order to facilitate the limit cooperation with the clamping cavity 241, clamping tongues 53 can be respectively arranged on the left pin pulling plate 51 and the right pin pulling plate 52. By inserting the clamping tongues 53 into and limitingly clamping in the corresponding clamping cavities 241, the connection firmness between the pin pulling plate and the sleeve seat can be increased.

[0051] As Figure 2 shown, in the embodiment of the present utility model, the clamping tongue 53 is provided with an arched cavity 531. The arched cavity 531 penetrates the clamping tongue 53 along the width direction of the clamping tongue 53. The clamping cavity 241 is arranged in a U shape and is provided with a U-shaped opening. The clamping cavity 241 clamps the clamping tongue 53 along the penetrating direction of the arched cavity 531 and one side cavity wall of the clamping cavity 241 is located in the arched cavity 531. By providing the arched cavity 531, it can be avoided that the clamping tongue 53 slips out of the clamping cavity 241, and it is convenient for the driving part to cooperate with the pin pulling plate in traction.

[0052] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0054] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0055] Although the embodiments of the present utility model have been described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A pin extraction mechanism, characterized in that, The pin pulling mechanism includes: A threaded pull rod (1); A left-handed sleeve seat (21) and a right-handed sleeve seat (22), both including a sleeve connection part (23) for threadedly sleeving and cooperating with the threaded pull rod (1) and a limit connection part (24) for limit cooperation with the pin pulling plate. The limit connection part (24) is located on the radial side of the sleeve connection part (23); Wherein, the thread directions of the sleeve connection parts (23) of the left-handed sleeve seat (21) and the right-handed sleeve seat (22) are opposite.

2. The pin extraction mechanism according to claim 1, characterized in that The limit connection part (24) is detachably and fixedly connected to the pin pulling plate through a connecting piece (3).

3. The pin extraction mechanism according to claim 2, characterized in that, A clamping cavity (241) is provided on the limit connection part (24). The clamping cavity (241) is used for the pin pulling plate to extend into and be clamped. The pin pulling mechanism further includes a connecting piece (3), and the connecting piece (3) is used for fixedly connecting the limit connection part (24) and the pin pulling plate.

4. The pin extraction mechanism according to claim 3, characterized in that, The clamping cavity (241) is arranged in a U shape and has a U-shaped opening. The opening direction of the U-shaped opening is perpendicular to the axial direction. The clamping cavity is used for clamping the pin pulling plate from the side of the pin pulling plate, and the connecting piece (3) is used for connecting the cavity walls of the clamping cavity (241) and the pin pulling plate in series.

5. The pin extraction mechanism according to claim 2, characterized in that, The connecting piece (3) is a spring bolt.

6. The pin pulling mechanism according to any one of claims 1 to 5, characterized in that, A through hole penetrating radially is provided on the threaded pull rod (1). The pin pulling mechanism further includes a torsion rod (4), and the torsion rod (4) is inserted into the through hole and is perpendicular to the threaded pull rod (1).

7. The pin extraction mechanism according to claim 6, characterized in that, The through hole is a cross hole.

8. A pin pulling device assembly with a double pin pulling plate, characterized in that, The pin pulling device assembly with a double pin pulling plate includes: The pin pulling mechanism according to any one of claims 1 to 7; A left pin pulling plate (51) and a right pin pulling plate (52), and the left pin pulling plate (51) and the right pin pulling plate (52) are respectively used for detachably and fixedly connecting with the corresponding left-handed sleeve seat (21) and right-handed sleeve seat (22).

9. The pin extraction device assembly with a double pin extraction plate according to claim 8, characterized in that, The left pin pulling plate (51) and the right pin pulling plate (52) are respectively provided with clamping tongue eaves (53). Clamping cavities (241) are provided on both the left-handed sleeve seat (21) and the right-handed sleeve seat (22). The clamping tongue eaves (53) are used for extending into and being limit clamped in the corresponding clamping cavities (241).

10. The pin pulling device assembly with double pin pulling plates according to claim 9, characterized in that, An arched cavity (531) is provided on the clamping tongue eaves (53). The arched cavity (531) penetrates the clamping tongue eaves (53) along the width direction of the clamping tongue eaves (53). The clamping cavity (241) is arranged in a U shape and has a U-shaped opening. The clamping cavity (241) clamps the clamping tongue eaves (53) along the penetrating direction of the arched cavity (531), and one side cavity wall of the clamping cavity (241) is located in the arched cavity (531).

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