WO2023029717A1

WO2023029717A1 - Pin inserting and pulling mechanism and crane

Info

Publication number: WO2023029717A1
Application number: PCT/CN2022/103173
Authority: WO
Inventors: 曾涛; 游浩杰; 王后
Original assignee: 湖南三一中型起重机械有限公司
Priority date: 2021-08-31
Filing date: 2022-06-30
Publication date: 2023-03-09
Also published as: CN113753772A; CN113753772B

Abstract

A pin inserting and pulling mechanism and a crane. The pin inserting and pulling mechanism is applied to a cargo boom, the cargo boom comprising a main boom (1) and an auxiliary boom (2). The pin inserting and pulling mechanism comprises a driving element (31) arranged on the main boom (1); a transmission assembly (32), wherein the driving element (31) is in driving connection with the transmission assembly (32); a lead screw (33), which lead screw (33) is in transmission connection with the transmission assembly (32), and is in threaded transmission connection with a pin shaft; and a limiting assembly used for limiting the rotation of the pin shaft. The lead screw (33) is used for driving the pin shaft to move in the axis direction of the lead screw (33), so that the pin shaft can be inserted into the main boom (1) and the auxiliary boom (2) or pulled out of the main boom (1) and the auxiliary boom (2). In the crane, the driving element drives the transmission assembly to operate, and then drives the lead screw to rotate, and the rotation of the pin shaft is limited by the limiting assembly, such that the pin shaft moves in the opposite direction or in the reverse direction in the length direction of the lead screw, and the pin shaft can then be automatically inserted into or pulled out of the main boom and the auxiliary boom.

Description

A plugging pin mechanism and a crane

technical field

The present application relates to the technical field of cranes, in particular, to a plug-in mechanism and a crane.

Background technique

When a crane is hoisting a small tonnage over a long distance or a super high distance, it is usually necessary to install a jib on the main jib to increase the length of the jib. During installation, the pin shaft is inserted into the connecting hole of the main arm and the auxiliary arm to realize the hinged connection between the auxiliary arm and the main arm, so that the auxiliary arm can rotate around the pin shaft relative to the main arm. However, in the prior art, the pin shaft is usually installed manually, which is time-consuming and laborious when the jib is frequently installed and disassembled, and the pin shaft is easily lost.

Contents of the invention

The problem solved by this application is time-consuming and labor-intensive manual installation of pin shafts.

In order to solve the above problems, the present application provides a pin insertion mechanism, which is applied to a boom. The boom includes a main arm and an auxiliary arm. The pin insertion mechanism includes:

a driving element arranged on said main arm;

a transmission assembly, the driving element is drivingly connected to the transmission assembly;

a screw rod, the screw rod is in drive connection with the transmission assembly, and the screw rod is suitable for screw drive connection with the pin shaft;

A limit assembly, the limit assembly is used to limit the rotation of the pin shaft; the screw rod is used to drive the pin shaft to move along the axis direction of the screw rod so as to insert the pin shaft into the main shaft arm and the secondary arm or extract the pin from the main arm and the secondary arm.

Optionally, the limiting assembly includes a limiting member and a connecting member, one end of the connecting member is connected to the pin shaft; the pin shaft includes a limiting column segment and a cylindrical segment connected coaxially, and the limiting The connecting piece includes a connecting section and an abutting section connected to each other, the connecting section is used for connecting with the main arm, and when the connecting piece is in the first position, the abutting section is adapted to limit the rotation of the connecting piece ; when the connecting piece is at the second position, the abutting section releases the restriction on the connecting piece, the limiting column section is suitable for inserting into the auxiliary arm, and the cylindrical section is suitable for inserting into the main arm arm.

Optionally, the pin shaft includes a first pin shaft and a second pin shaft, a first thread structure and a second thread structure are respectively provided at both axial ends of the screw rod, and the first thread structure and the the direction of rotation of the second thread structure is opposite;

One end of the connector is connected to the first pin, and the other end is provided with a limiting hole. The second pin includes a second limiting column section and a second cylindrical section connected coaxially. The second limiting The column segment is matched with the limit hole, the second limit column segment is passed through the limit hole, the second limit column segment is suitable for sliding along the limit hole, and the limit The position piece is suitable for restricting the rotation of the connecting piece;

The first pin includes a coaxially connected first limiting column section and a first cylindrical section, the first cylindrical section is connected to the connector, and the first limiting column section is close to one end of the screw rod A third thread structure matching the first thread structure is provided, and a fourth thread structure matching the second thread structure is provided at one end of the second limiting column near the screw rod;

When the connecting piece is at the second position, the first cylindrical section is inserted into the main arm, the first limiting column section is inserted into the auxiliary arm, and the second cylindrical section is inserted into the main arm, so The second limiting column section is inserted into the auxiliary arm.

Optionally, the main arm includes a first connecting ear and a second connecting ear, the auxiliary arm includes a third connecting ear and a fourth connecting ear, a first connecting hole is opened on the first connecting ear, and the The second connecting ear is provided with a second connecting hole, the third connecting ear is provided with a first limiting hole matching the first limiting column section, and the fourth connecting ear is provided with a hole matching the first limiting column section. The second limiting hole matched with the second limiting column section, the first connecting hole, the second connecting hole, the first limiting hole and the second limiting hole are arranged coaxially; when When the connector is at the second position, the first cylindrical section is inserted into the first connecting hole, the first limiting column section is inserted into the third connecting hole, and the second cylindrical section is inserted into the first connecting hole. Two connecting holes, the second limiting column section is inserted into the fourth connecting hole.

Optionally, a gear mounting frame is also included, the gear mounting frame is connected to the main arm, the transmission assembly includes a first gear and a second gear meshing with each other, and the first gear and the second gear are respectively Rotationally connected to the gear mounting frame; the first gear is connected to the screw rod, the first gear is suitable for driving the screw rod to rotate, the driving element is drivingly connected to the second gear, and the The driving element is adapted to drive the second gear to rotate.

Optionally, it also includes a locking pin structure, an eccentric limiting hole is opened on the first gear, the locking pin structure is connected with the connecting piece, and the locking pin structure is suitable for being inserted into the eccentric limiting hole. bit hole.

Optionally, the locking pin structure includes a pin seat, a spring and a lock pin, the pin seat is connected to the connecting piece, the pin seat is provided with an accommodating groove, and the spring is placed in the In the accommodating groove, the two ends of the spring are respectively connected with the pin seat and the locking pin, and the locking pin is partially inserted into the accommodating groove, and the locking pin is suitable for moving along the accommodating groove. sliding, the lock pin is suitable for being inserted into the eccentric limiting hole.

Optionally, the connector further includes a positioning support, the positioning support is located on the side of the first gear away from the locking pin structure, and a positioning hole is opened on the positioning support; the locking The pin structure is adapted to be inserted into the eccentric limiting hole and the positioning hole at the same time.

Optionally, a switch bracket is also included, the switch bracket is connected with the main arm, a limit slot is opened on the switch bracket, and the locking pin structure also includes a toggle piece, and the toggle piece is connected to the The side wall of the lock pin is connected; when the connecting piece is in the first position, the toggle piece is partially accommodated in the limiting groove; a guide structure is also provided on the switch bracket, and the guide The structure is connected to the side wall of the limiting groove, and the guiding structure is suitable for guiding the toggle member into the limiting groove.

Compared with the prior art, the beneficial effects of the boom described in the present application are:

In this application, the driving element drives the transmission assembly to run, and then drives the screw to rotate, and the limit assembly restricts the rotation of the pin shaft, so that the pin shaft moves toward each other along the length direction of the screw shaft. Movement or reverse movement, and then realize the automatic pin insertion and extraction of the main arm and the auxiliary arm.

When it is necessary to install the first pin shaft and the second pin shaft, the first pin shaft and the second pin shaft are driven to move in reverse through the plug-in pin mechanism while realizing the first The insertion and extraction of the pin shaft and the second pin shaft are more efficient, and the connection strength between the main arm and the auxiliary arm can also be increased through the arrangement of the two pin shafts.

The present application also provides a crane, including the plug-in and pull-out mechanism as described above. The beneficial effects of the crane and the plug-in pin mechanism are the same, and will not be repeated here.

Description of drawings

Figure 1 is a structural diagram of the connection position with the main arm when the auxiliary arm is installed in the embodiment of the present application;

Fig. 2 is a structural diagram of the plug-in pin mechanism installed on the boom in the embodiment of the present application;

Fig. 3 is a structural diagram of the plug-in pin mechanism in the embodiment of the present application;

Fig. 4 is a partial enlarged view of place A in Fig. 3 of the present application;

Fig. 5 is a structural diagram of the plug-in pin mechanism in the embodiment of the present application;

FIG. 6 is a structural diagram of a connector in an embodiment of the present application;

Fig. 7 is a side view of the plugging pin mechanism in the embodiment of the present application.

Explanation of reference signs:

1-Main arm, 2-Auxiliary arm, 3-Plugging pin mechanism, 4-First pin shaft, 5-Second pin shaft, 6-Switching bracket, 7-Limiting piece, 8-Connecting piece, 9-Lock Pin structure, 11-first connecting ear, 12-second connecting ear, 21-third connecting ear, 22-fourth connecting ear, 31-driving element, 32-transmission assembly, 33-screw rod, 34-gear Mounting frame, 41-first cylindrical section, 42-first limiting column section, 51-second cylindrical section, 52-second limiting column section, 61-limiting groove, 62-guiding structure, 71-butting Section, 72-connection section, 81-connector body, 82-limiting frame, 83-connecting seat, 84-positioning support, 85-mounting seat, 86-limiting hole, 91-lock pin, 92-toggle Parts, 93-pin shaft seat, 321-first gear, 322-second gear, 331-first thread structure, 332-second thread structure, 841-positioning hole, 3211-eccentric limit hole.

Detailed ways

In order to make the above purpose, features and advantages of the present application more obvious and understandable, specific embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

In the description of the present application, descriptions referring to the terms "an embodiment", "an embodiment" and "an implementation" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in this application. In at least one example or implementation of the application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

Moreover, the Z-axis in the drawings represents the vertical direction, that is, the up-down direction, and the positive direction of the Z-axis (that is, the arrow pointing to the Z-axis) represents the upper direction, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) Direction) means down; the X-axis in the drawings means the front-to-back direction, and the positive direction of the X-axis (that is, the arrow pointing to the X-axis) represents the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) Indicates the front; the Y-axis in the attached figure indicates the left-right direction, and the positive direction of the Y-axis (that is, the arrow pointing to the Y-axis) represents the left, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the right At the same time, it should be noted that the meanings of the aforementioned Z-axis, Y-axis and X-axis are only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, with a specific Azimuth configuration and operation, therefore, should not be construed as limiting the application.

This application provides a pin insertion mechanism, as shown in Figures 1 to 5, which is applied to a boom. The boom includes a main boom 1 and an auxiliary boom 2, including:

a driving element 31, configured to be arranged on the main arm 1;

a transmission assembly 32, the drive element 31 is drivingly connected to the transmission assembly 32;

A screw rod 33, the screw rod 33 is in drive connection with the transmission assembly 32, and the screw rod 33 is suitable for screw drive connection with a pin shaft;

A limit assembly, the limit assembly is used to limit the rotation of the pin shaft; the screw rod 33 is used to drive the pin shaft to move along the axis direction of the screw rod 33 so as to insert the pin shaft into the The main arm 1 and the auxiliary arm 2 or the pin shaft is pulled out from the main arm 1 and the auxiliary arm 2 .

Here, the pin shaft can be one or two, and two pin shafts are used for illustration here, and the driving element 31 is suitable for driving the screw rod 33 to rotate through the transmission assembly 32, and the screw rod 33 are respectively provided with a first threaded structure 331 and a second threaded structure 332 at both ends of the circumferential direction. There is a third thread structure matching the first thread structure 331, a fourth thread structure matching the second thread structure 332 is provided on the second pin shaft 5, and the limit assembly is suitable for restrict the rotation of the first pin shaft 4 and the second pin shaft 5, the first pin shaft 4 and the second pin shaft 5 can move along the Z-axis direction relative to the limit assembly, and the drive The element 31 can be a motor or other mechanism for rotational driving, and the transmission assembly 32 can be a belt transmission assembly, or a gear transmission assembly, and the gear assembly can be one, two or more gears meshing with each other. When the driving element 31 is running, it can drive the transmission assembly 32 to move, and then drive the screw rod 33 to rotate. The two ends of the screw rod 33 drive the first pin shaft 4 and the second pin shaft 5 to rotate, when the rotation of the first pin shaft 4 and the second pin shaft 5 is limited by the assembly When restricted, the first pin shaft 4 and the second pin shaft 5 move toward each other or in opposite directions along the length direction of the screw rod 33 . By setting the first threaded structure 331 and the second threaded structure 332 with opposite rotation directions at the two ends of the screw rod 33, and opening the first threaded structure 331 on the first pin shaft 4 Matching third thread structure, the second pin shaft 5 is provided with a fourth thread structure matching the second thread structure 332, the first pin shaft 4 and the second The rotation of the pin shaft 5 is limited, so that the movement of the first pin shaft 4 and the second pin shaft 5 along the length direction of the screw rod 33 toward each other or in the opposite direction is realized. Thus, the driving element 31 drives the transmission assembly 32 to rotate, and then drives the screw rod 33 to rotate, and the rotation of the pin shaft is limited by the limit assembly, so that the pin shaft moves along the screw rod 33. The movement in the length direction of the machine moves in the opposite direction or in the opposite direction, and then realizes the automatic pin insertion and extraction of the main arm 1 and the auxiliary arm 2.

As shown in Figures 3 and 6, the limiting assembly includes a limiting member 7 and a connecting member 8, and one end of the connecting member 8 is connected to the pin shaft; the pin shaft includes a coaxially connected limiting column section and A cylindrical segment, the limiting member 7 includes a connecting segment 72 and an abutting segment 71 connected to each other, the connecting segment 72 is used to connect with the main arm 1, when the connecting member 8 is in the first position, the The abutting section 71 is adapted to limit the rotation of the connecting piece 8; when the connecting piece 8 is in the second position, the abutting section 71 releases the restriction on the connecting piece 8, and the limiting column section It is suitable for inserting into the secondary arm 2 , and the cylindrical section is suitable for inserting into the main arm 1 .

Here, the cross-section of the limiting column section can be rectangular or polygonal, the limiting column section is suitable for inserting into the auxiliary arm 2, and the cylindrical section is suitable for inserting into the main arm 1, as shown in Figure 3, which is a connection The structure diagram when the part 8 is in the first position. Here, the limiting part 7 can be in an L-shaped structure, the abutting section 71 is arranged along the Z-axis direction, and one end of the connecting section 72 is connected to the main arm 1 The other end is connected to the abutting section 71, and the connecting section 72 is arranged along the Z-axis direction. When the connecting piece 8 is in the first position, the abutting section 71 abuts against the limit frame 82 Then, the rotation of the connecting member 8 is restricted. When the connecting member 8 follows the first pin shaft 4 and moves along the Z axis in the positive direction, when it moves to the second position, the limit frame 82 is no longer in contact with the The abutting section 71 abuts, the first gear 321 drives the first pin shaft 4 to rotate, the first pin shaft 4 drives the connecting piece 8 to rotate, and the first pin shaft is realized through the connecting piece 8. The strengthening of the structure of the shaft 4 and the second pin shaft 5 can also prevent the first pin shaft 4 from detaching from the first connecting hole and the first pin shaft limiting hole, and can also prevent the second pin shaft from being separated from the first connecting hole and the first pin shaft limiting hole. The pin shaft 5 is disengaged from the second connecting hole and the fourth connecting hole. Thus, through the setting of the connecting piece 8, one end of the connecting piece 8 is connected to the first pin shaft 4, and the other end is provided with a limiting hole 86 matched with the second limiting column section 52, By restricting the rotation of the connecting member 8 by the limiting member 7 , the rotation of the first pin shaft 4 and the second pin shaft 5 is simultaneously restricted.

As shown in Figure 3, optionally, the pin shaft includes a first pin shaft 4 and a second pin shaft 5, and the two axial ends of the screw rod 33 are respectively provided with a first thread structure 331 and a second thread structure 332, the direction of rotation of the first thread structure 331 and the second thread structure 332 is opposite;

One end of the connecting member 8 is connected to the first pin shaft 4, and the other end defines a limiting hole 86. The second pin shaft 5 includes a second limiting column section 52 and a second cylindrical section 51 connected coaxially. The second limiting column section 52 is matched with the limiting hole 86, the second limiting column section 52 is passed through the limiting hole 86, and the second limiting column section 52 is suitable for Sliding along the limiting hole 86, the limiting member 7 is suitable for limiting the rotation of the connecting member 8;

The first pin shaft 4 includes a first limiting column section 42 and a first cylindrical section 41 coaxially connected, the first cylindrical section 41 is connected with the connecting piece 8, and the first limiting column section 42 A third thread structure matching the first thread structure 331 is provided near the end of the screw rod 33 , and a third thread structure matching the second thread structure is provided at the end of the second limiting column section 52 near the screw rod 33 . 332 matching fourth thread structure;

When the connecting member 8 is in the second position, the first cylindrical section 41 is inserted into the main arm 1, the first limiting column section 42 is inserted into the auxiliary arm 2, and the second cylindrical section 51 is inserted into The main arm 1 and the second limiting column segment 52 are inserted into the auxiliary arm 2 .

The maximum length of the cross section of the first limiting column section 42 is greater than the diameter of the first connecting hole, and the maximum length of the cross section of the second limiting column section 52 is greater than the diameter of the second connecting hole. The first cylindrical section 41 is rotatably connected to the first connecting hole, the first limiting column section 42 is limitedly fitted with the first pin limiting hole, and the second cylindrical section 51 is connected to the first pin limiting hole. The second connecting hole is rotatably connected, and the second limiting column segment 52 is limitedly matched with the second rotating shaft limiting hole. That is to say, the driving element 31 drives the transmission assembly 32 to move, and then drives the screw rod 33 to rotate, and the screw rod 33 drives the first pin shaft 4 and the second pin shaft 5 to rotate, when When the connecting piece 8 is in the second position, the first cylindrical section 41 rotates relative to the first connecting hole, and the second cylindrical section 51 rotates relative to the second connecting hole. The column section 42 is in limited cooperation with the first pin shaft limit hole, the second limit column section 52 is in limit cooperation with the second rotating shaft limit hole, and the first limit column section 42 and the The second limiting column section 52 jointly drives the auxiliary arm 2 to rotate.

When the first pin shaft 4 and the second pin shaft 5 move toward each other or move in the opposite direction along the length direction of the screw rod 33, since the first pin shaft 4 is connected with the connecting member 8, The connecting member 8 follows the first pin shaft 4 and moves forward along the Z axis, while the second pin shaft 5 moves reversely along the Z axis. At this time, the second pin shaft 5 and the limiting hole 86 are connected relatively sliding. The second limiting column section 52 and the second cylindrical section 51 can be integrally connected or detachably connected, the cross section of the second limiting column section 52 is rectangular, and the cross section of the second cylindrical section 51 is round. The section of the limiting hole 86 is rectangular.

Thus, by inserting the first cylindrical section 41 into the first connecting hole, the first limiting column section 42 is inserted into the first pin limiting hole, and the second cylindrical section 51 is inserted into the In the second connecting hole, the second limiting column section 52 is inserted into the second rotating shaft limiting hole, so that the auxiliary arm 2 is driven to rotate through the first pin shaft 4 and the second pin shaft 5 , Therefore, the auxiliary arm 2 is driven to rotate while the pin is inserted and pulled out through a driving element 31 .

Optionally, as shown in FIG. 1 and FIG. 5, the main arm 1 includes a first connecting ear 11 and a second connecting ear 12, and the auxiliary arm 2 includes a third connecting ear 21 and a fourth connecting ear 22. The first connecting ear 11 is provided with a first connecting hole, the second connecting ear 12 is provided with a second connecting hole, and the third connecting ear 21 is provided with a The first pin shaft limiting hole, the fourth connecting ear 22 is provided with a second rotating shaft limiting hole matching the second limiting column section 52, the first connecting hole, the second The connecting hole, the first pin limiting hole and the second rotating shaft limiting hole are arranged coaxially; when the connecting member 8 is in the second position, the first cylindrical section 41 is inserted into the first connecting hole, the first limiting column section 42 is inserted into the third connecting hole, the second cylindrical section 51 is inserted into the second connecting hole, and the second limiting column section 52 is inserted into the fourth connecting hole . The plug-in pin mechanism 3 is suitable for inserting the first pin shaft 4 into the first connection hole and the first pin shaft limiting hole, so as to realize the first connection ear 11 and the third connection The ear 21 is rotatably connected, and at the same time, the second pin shaft 5 is inserted into the second connection hole and the fourth connection hole, so as to realize the rotatable connection between the second connection ear 12 and the fourth connection ear 22, or the The plug-in pin mechanism 3 is adapted to extract the first pin shaft 4 from the first connecting hole and the first pin shaft limiting hole, and at the same time pull the second pin shaft 5 from the second connecting hole and the first pin shaft limiting hole. The fourth connecting hole is pulled out.

Here, Figure 1 is a structural diagram of the connection position between the auxiliary arm and the main arm when the auxiliary arm is installed. ; FIG. 2 is a structural view of the plug pin mechanism 3 installed on the boom in the embodiment of the present application, and FIG. 2 is a partial schematic diagram of the boom. The first connecting ear 11 and the second connecting ear 12 can be a fork ear or a single ear, and the third connecting ear 21 and the fourth connecting ear 22 can be a single ear or a fork ear; in one embodiment, the The plug pin mechanism 3 may be a ball screw mechanism, and the ball screw mechanism is arranged between the first connecting ear 11 and the second connecting ear 12, and the ball screw mechanism simultaneously drives the The first pin shaft 4 and the second pin shaft 5 move toward each other or move in reverse along the Z axis; when the first pin shaft 4 and the second pin shaft 5 are installed, the ball screw mechanism Drive the first pin shaft 4 and the second pin shaft 5 to move in reverse, so that the first pin shaft 4 is inserted into the first connecting hole and the first pin shaft limiting hole, and at the same time the second pin shaft The pin 5 is inserted into the second connection hole and the fourth connection hole; when the first pin 4 and the second pin 5 need to be pulled out, the ball screw mechanism drives the first The pin shaft 4 and the second pin shaft 5 move toward each other, so that the first pin shaft 4 is pulled out from the first connecting hole and the first pin shaft limiting hole, and the second pin shaft 5 is pulled out from the first pin shaft limiting hole at the same time. The second connection hole and the fourth connection hole are pulled out. Similarly, the pin insertion mechanism may also be a rack-and-pinion mechanism, and the first pin shaft 4 and the second pin shaft 5 are driven to move toward each other or reversely through the rack-and-pinion mechanism.

Thus, through the setting of the plug-in pin mechanism 3, it is realized that the main arm 1 and the auxiliary arm 2 are automatically plugged in and out, and the first pin shaft 4 and the second pin shaft 5 are inserted through the plug-in pins. The mechanism is connected to the main arm, so that the loss of the first pin shaft 4 and the second pin shaft 5 can be avoided. When the installation of the first pin shaft 4 and the second pin shaft 5 is required, the first pin shaft 4 and the second pin shaft 5 are driven to move in reverse through the plug-in pin mechanism 3, The first pin shaft 4 is inserted into the first connecting hole and the first pin limiting hole, so as to realize the rotational connection of the first connecting ear 11 and the third connecting ear 21, and at the same time connect the second The pin shaft 5 is inserted into the second connection hole and the four connection holes to realize the rotational connection between the second connection ear 12 and the fourth connection ear 22; The mechanism 3 drives the first pin shaft 4 and the second pin shaft 5 to move toward each other, so that the first pin shaft 4 is pulled out from the first connecting hole and the first pin shaft limiting hole, and at the same time Pull out the second pin shaft 5 from the second connection hole and the fourth connection hole. In addition, the insertion and extraction of the first pin shaft 4 and the second pin shaft 5 are simultaneously realized through the plug-in pin mechanism 3, which is more efficient, and the setting of the two pin shafts can also increase the The connection strength of the main arm 1 and the auxiliary arm 2.

Optionally, as shown in FIGS. 3 and 6 , the connector 8 includes a connector body 81 , a limit frame 82 and a connection seat 83 , and the limit frame 82 and the connection seat 83 are respectively arranged on the connection At opposite ends of the component body 81 , the limiting hole 86 is opened on the limiting frame 82 , and the connecting seat 83 is connected to the first pin shaft 4 . The axial direction of the limiting hole 86 is parallel to the central axis of the threaded rod 33 .

As shown in Fig. 3 and Fig. 7, the plug pin mechanism further includes a gear mounting frame 34, the gear mounting frame 34 is connected to the main arm 1, and the transmission assembly 32 includes a first gear 321 and a first gear 321 which mesh with each other. The second gear 322, the first gear 321 and the second gear 322 are respectively rotatably connected to the gear mount 34; the first gear 321 is connected with the screw mandrel 33, and the first gear 321 It is suitable for driving the screw rod 33 to rotate, the driving element 31 is drivingly connected with the second gear 322 , and the driving element 31 is suitable for driving the second gear 322 to rotate.

Here, the radius of the first gear 321 is larger than the radius of the second gear 322, so that the transmission ratio can be increased, and the screw mandrel 33 passes through the center of the first gear 321 and is connected with the first gear 321 , the gear mounting frame 34 is provided with a screw mounting hole, the screw 33 passes through the screw mounting hole to realize the rotational connection of the first gear 321, and the second gear 322 is arranged at one axial end There is a rotating shaft, and the gear mounting frame 34 is provided with a rotating shaft connecting hole, and the rotating shaft passes through the rotating shaft connecting hole to install the second gear 322 on the gear mounting frame 34 . The gear mounting frame 34 is also provided with a through hole, the output shaft of the driving element 31 is connected to the second gear 322 through the through hole, and the second gear 322 is driven to rotate by the driving element 31 . The driving element 31 drives the second gear 322 and the first gear 321 to move, and then drives the screw to move, so that the transmission is more stable.

Optionally, as shown in FIG. 3 and FIG. 4 , the plug-in pin mechanism further includes a locking pin structure 9, and an eccentric limiting hole 3211 is opened on the first gear 321, and the locking pin structure 9 and The connecting piece 8 is connected, and the locking pin structure 9 is adapted to be inserted into the eccentric limiting hole 3211 .

Here, the locking pin structure 9 can be installed on the connector body 81 through the mounting seat 85, the locking pin structure 9 is arranged along the Z-axis direction, the eccentric limiting hole 3211 and the first gear 321 are parallel to the central axis, the eccentric limiting hole 3211 is set away from the center of the first gear 321, the locking pin structure 9 moves forward along the Z axis, and after the connecting member 8 reaches the second position, The locking pin structure 9 can abut against the first gear 321, and when the position of the eccentric limiting hole 3211 corresponds to the position of the locking pin structure 9, the locking pin structure 9 is inserted into the In the eccentric limit hole 3211, the synchronous movement of the connecting member 8 and the first gear 321 is realized, and the position where the screw mandrel 33 is connected to the first pin shaft 4 or the second pin shaft 5 is prevented from slipping; After the locking pin structure 9 is inserted into the eccentric limiting hole 3211, the first gear 321 directly drives the movement of the connecting piece 8, and the first thread structure 331 and the second thread structure 332 can also be realized. Protect.

Optionally, as shown in FIG. 4 , the locking pin structure 9 includes a pin seat 93, a spring and a lock pin 91, the pin seat 93 is connected to the connector 8, and the pin seat 93 is An accommodating groove is provided, the spring is placed in the accommodating groove, the two ends of the spring are respectively connected with the pin shaft seat 93 and the locking pin 91, and the locking pin 91 is partially inserted into the accommodating The locking pin 91 is adapted to slide along the accommodating slot; when the connecting member 8 is in the second position, the locking pin 91 is adapted to be inserted into the eccentric limiting hole 3211 . Here, the pin shaft seat 93 can be connected with the installation seat 85, the lock pin 91 is arranged along the Z-axis direction, and when the lock pin structure 9 moves along the Z-axis positive direction, when the connecting member 8 reaches Before the second position, under the action of the spring, the lock pin 91 abuts against the first gear 321, when the position of the eccentric limit hole 3211 corresponds to the position of the lock pin 91, under the spring force and Under the combined action of the driving force of the threaded rod 33 , the locking pin 91 is inserted into the eccentric limiting hole 3211 , and the spring can also provide a buffer to prevent the locking pin 91 from being stuck with the first gear 321 .

Optionally, as shown in FIG. 6, the connecting member 8 further includes a positioning support 84, the positioning support 84 is located on the side of the first gear 321 away from the locking pin structure 9, the positioning support A positioning hole 841 is opened on the seat 84; when the connecting member 8 is in the second position, the locking pin structure 9 is inserted into the eccentric limiting hole 3211 and the positioning hole 841 at the same time. Here, the positioning hole 841 is set concentrically with the locking pin structure 9, and when the locking pin structure 9 snaps into the eccentric limiting hole 3211, the locking pin structure 9 continues to move in the positive direction of the Z axis. The movement is inserted into the positioning hole 841, so that the stability of the connection of the locking pin structure 9 can be increased, and the stability of the overall transmission can also be increased.

Optionally, as shown in FIG. 4 , the plug-in pin mechanism further includes a switching bracket 6, which is connected to the main arm 1, and a limit slot 61 is opened on the switching bracket 6, and the locking pin The structure 9 also includes a toggle piece 92, the toggle piece 92 is connected to the side wall of the lock pin 91; when the connecting piece 8 is in the first position, the toggle piece 92 is partially housed in In the limiting slot 61 . When the connecting member 8 moves forward along the Z axis, before the connecting member 8 reaches the second position, the toggle member 92 is partially accommodated in the limiting groove 61, and the limiting The slot 61 can prevent the locking pin 91 from moving positively toward the Z axis. At this time, the spring is compressed. disengaged, the lock pin 91 abuts against the first gear 321 under the force of the spring. In this way, it can be avoided that the locking pin 91 is inserted into the eccentric limiting hole 3211 before the connecting member 8 reaches the second position.

Optionally, as shown in FIG. 4 , a guide structure 62 is provided on the switching bracket 6, and the guide structure 62 is connected to the side wall of the limiting groove 61, and the guide structure 62 is suitable for connecting the The toggle piece 92 is guided into the limiting groove 61 . Here, the guide structure 62 is located on the side of the toggle member 92 close to the first gear 321. The guide structure 62 is a guide surface structure, and the guide surface structure can be an arc surface or an inclined surface. When the connecting member 8 reaches the second position, the connecting member 8 rotates, so that the toggle member 92 breaks away from the limiting groove 61, and under the action of the guiding structure 62, the guiding structure 62 makes the lock Pin 91 stretches out slowly under the effect of spring. Similarly, when the auxiliary arm 2 is retracted, the toggle member 92 can return to the limit groove 61 under the action of the guide structure 62, so as to realize the locking pin 91 from the eccentric Pull out from the limiting hole 3211.

Here, preferably, the switching bracket 6 includes an arc-shaped plate, the arc-shaped plate coincides with the central axis of the first gear 321, and the guide structure 62 is provided on the arc-shaped plate close to the Z axis. on one side wall.

Another embodiment of the present application provides a crane, including the insertion and extraction pin mechanism as described above. The beneficial effects of the crane and the plug-in pin mechanism are the same, and will not be repeated here.

Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will all fall within the protection scope of the present application.

Claims

A plugging pin mechanism is applied to a boom, the boom includes a main arm (1) and an auxiliary arm (2), and the plugging pin mechanism includes:

a driving element (31), configured to be arranged on said main arm (1);

a transmission assembly (32), the drive element (31) is drivingly connected to the transmission assembly (32);

A screw mandrel (33), the screw mandrel (33) is connected to the transmission assembly (32) in a driving manner, and the screw mandrel (33) is suitable for a threaded transmission connection with a pin shaft;

A limit assembly, the limit assembly is used to limit the rotation of the pin shaft; the screw rod (33) is used to drive the pin shaft to move along the axis direction of the screw rod (33) to realize the The pin shaft is inserted into the main arm (1) and the auxiliary arm (2) or the pin shaft is pulled out from the main arm (1) and the auxiliary arm (2).
According to the plug-in pin mechanism according to claim 1, the limiting assembly includes a limiting member (7) and a connecting member (8), and one end of the connecting member (8) is connected to the pin shaft; the pin shaft It includes a coaxially connected limiting column section and a cylindrical section, the limiting member (7) includes a connecting section (72) and an abutting section (71) connected to each other, and the connecting section (72) is used to communicate with the The main arm (1) is connected, and when the connecting piece (8) is in the first position, the abutting section (71) is adapted to limit the rotation of the connecting piece (8); when the connecting piece (8) When located at the second position, the abutting section (71) releases the restriction on the connecting piece (8), the limiting column section is suitable for inserting into the auxiliary arm (2), and the cylindrical section is suitable for inserting The main arm (1).
According to the plug-in pin mechanism according to claim 2, the pin shaft includes a first pin shaft (4) and a second pin shaft (5), and the two axial ends of the screw rod (33) are respectively provided with first A thread structure (331) and a second thread structure (332), the first thread structure (331) and the second thread structure (332) have opposite directions of rotation;

One end of the connecting piece (8) is connected to the first pin shaft (4), and the other end is provided with a limiting hole (86), and the second pin shaft (5) includes a second limiting column section connected coaxially (52) and the second cylindrical section (51), the second limiting column section (52) is matched with the limiting hole (86), and the second limiting column section (52) passes through the In the limiting hole (86), the second limiting column segment (52) is suitable for sliding along the limiting hole (86), and the limiting member (7) is suitable for limiting the connecting member (8 ) rotation;

The first pin shaft (4) includes a coaxially connected first limiting column section (42) and a first cylindrical section (41), and the first cylindrical section (41) is connected with the connecting piece (8) , the first limit column section (42) is provided with a third thread structure matching the first thread structure (331) near the end of the screw rod (33), and the second limit column section ( 52) A fourth thread structure matching the second thread structure (332) is provided near one end of the screw rod (33);

When the connecting piece (8) is in the second position, the first cylindrical section (41) is inserted into the main arm (1), and the first limiting column section (42) is inserted into the auxiliary arm (2 ), the second cylindrical segment (51) is inserted into the main arm (1), and the second limiting column segment (52) is inserted into the auxiliary arm (2).
According to the plug-in pin mechanism according to claim 3, the main arm (1) includes a first connecting ear (11) and a second connecting ear (12), and the auxiliary arm (2) includes a third connecting ear (21 ) and the fourth connecting ear (22), the first connecting ear (11) has a first connecting hole, the second connecting ear (12) has a second connecting hole, and the third connecting ear (21) is provided with a first pin limiting hole matching the first limiting column section (42), and the fourth connecting ear is provided with a second limiting column section (52) The matching second rotating shaft limiting hole, the first connecting hole, the second connecting hole, the first pin limiting hole and the second rotating shaft limiting hole are arranged coaxially; when the connecting When the piece (8) is in the second position, the first cylindrical segment (41) is inserted into the first connection hole, the first limiting column segment (42) is inserted into the third connection hole, and the second The cylindrical section (51) is inserted into the second connection hole, and the second limiting column section (52) is inserted into the fourth connection hole.
The plug-in pin mechanism according to claim 2, further comprising a gear installation frame (34), the gear installation frame (34) is connected with the main arm (1), and the transmission assembly (32) includes mutually meshing The first gear (321) and the second gear (322), the first gear (321) and the second gear (322) are respectively rotatably connected to the gear mount (34); the first gear (321) is connected with the screw mandrel (33), the first gear (321) is suitable for driving the screw mandrel (33) to rotate, and the driving element (31) is driven by the second gear (322) connected, the drive element (31) is adapted to drive the second gear (322) to rotate.
The plug-and-pull pin mechanism according to claim 5, further comprising a locking pin structure (9), an eccentric limit hole (3211) is opened on the first gear (321), and the locking pin structure (9) Connected with the connecting piece (8), the locking pin structure (9) is adapted to be inserted into the eccentric limiting hole (3211).
According to the plug-in pin mechanism according to claim 6, the locking pin structure (9) comprises a pin shaft seat (93), a spring and a lock pin (91), and the pin shaft seat (93) is connected with the connecting member (8) connection, the pin seat (93) is provided with an accommodation groove, the spring is placed in the accommodation groove, and the two ends of the spring are respectively connected with the pin seat (93) and the The locking pin (91) is connected, and the locking pin (91) is partially inserted into the accommodating groove, and the locking pin (91) is suitable for sliding along the accommodating groove, and the locking pin (91) is suitable for inserting In the eccentric limiting hole (3211).
According to the plug-in pin mechanism according to claim 6, the connecting piece (8) further includes a positioning support (84), and the positioning support (84) is located on the first gear (321) away from the locking On one side of the pin structure (9), a positioning hole (841) is opened on the positioning support (84); the locking pin structure (9) is suitable for being inserted into the eccentric limiting hole (3211) and the in the positioning hole (841).
The plugging pin mechanism according to claim 7, further comprising a switch bracket (6), the switch bracket (6) is connected to the main arm (1), and a limit slot (61) is opened on the switch bracket, The locking pin structure (9) also includes a toggle piece (92), and the toggle piece (92) is connected to the side wall of the lock pin (91); when the connecting piece (8) is positioned on the In the first position, the toggle piece (92) is partially accommodated in the limiting groove (61); a guiding structure (62) is also provided on the switching bracket (6), and the guiding structure (62 ) is connected to the side wall of the limiting groove (61), and the guiding structure (62) is suitable for guiding the toggle piece (92) into the limiting groove (61).
A crane, comprising the plug-in and pull-out pin mechanism according to any one of claims 1-9.