Pin insertion and extraction device, arm assembly and engineering machinery

Abstract

The present application discloses a pin plugging and pulling device, an arm assembly and engineering machinery, and relates to the technical field of engineering machinery. The pin plugging and pulling device includes a base, a first pin plugging and pulling mechanism, two second pin plugging and pulling mechanisms and an interlocking connecting rod mechanism; the first pin plugging and pulling mechanism is arranged on the base, and the first pin plugging and pulling mechanism is used to drive two arm pins to perform plugging and pulling actions simultaneously along a first direction; the two second pin plugging and pulling mechanisms are arranged on the base away from each other, and cylinder pins are respectively provided on the two second pin plugging and pulling mechanisms, which are used to drive the corresponding cylinder pins to perform plugging and pulling actions synchronously along the first direction; one end of the interlocking connecting rod mechanism is connected to the first pin plugging and pulling mechanism, and the other end is inserted into the base, and the interlocking connecting rod mechanism is used to form an interlocking cooperation with the second pin plugging and pulling mechanism to prevent the first pin plugging and pulling mechanism and the second pin plugging and pulling mechanism from performing the pin pulling action simultaneously. The pin plugging and pulling device disclosed in the present application has a simple structure, is safe and reliable, saves installation space and has a low manufacturing cost.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a pin insertion and extraction device, a boom assembly and engineering machinery. Background Art

[0002] At present, large-tonnage telescopic boom cranes mainly use a single-cylinder plug-in pin mechanism to assist in controlling the movement of the cylinder pin and arm pin in the telescopic arm, wherein the cylinder pin can be connected to the telescopic arm to drive the telescopic arm to extend and retract, and the arm pin is used to connect two adjacent telescopic arms. The plug-in pin mechanism is a key component of the telescopic arm. It moves frequently during the telescopic arm extension process, and the working conditions are complicated. The stability of its movement directly affects the telescopic efficiency of the telescopic arm.

[0003] The single-cylinder plug-in pin mechanism is divided into two types: top pin (single-arm pin) and side pin (double-arm pin). Among them, there are great differences in structure and principle between the single-cylinder plug-in pin mechanism of the top pin (single-arm pin) and the side pin (double-arm pin).

[0004] In the prior art, the plugging and pulling actions of the cylinder pin and the arm pin in the side pin type plugging and pulling pin mechanism are generally controlled by two groups of oil cylinders, wherein one group of horizontal oil cylinders is extended and retracted in the horizontal plane to control the plugging and pulling actions of the cylinder pin, and the other group of horizontal oil cylinders is extended and retracted in the horizontal plane to control the plugging and pulling actions of the arm pin. In the prior art, in order to realize the back and forth switching of the locking state of the cylinder pin in the telescopic arm and the locking state of the arm pin, and to have an interlocking function, there are many parts connected between the two groups of oil cylinders, and the processing technology requirements are high, resulting in a very complex cylinder head structure. And with the further development of telescopic arm cranes towards large-scale, the diameter of the oil cylinder and the design specifications of the cylinder pin are further increased, resulting in a larger external dimension of the plugging and pulling pin mechanism, more parts, and inconvenient installation and maintenance. Summary of the invention

[0005] The purpose of the present application is to provide a pin insertion and extraction device, an arm assembly and an engineering machinery to solve the deficiencies in the prior art.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present application provides a pin insertion and extraction device, which is applied to a boom assembly, and the pin insertion and extraction device comprises:

[0007] Pedestal;

[0008] A first plugging and pulling pin mechanism, disposed on the base, for simultaneously driving two oppositely arranged arm pins in the arm support assembly in a first direction to perform a plugging and pulling action;

[0009] Two second plug-in and pull-out pin mechanisms are disposed on the base away from each other, and the two second plug-in and pull-out pin mechanisms are respectively provided with cylinder pins, and the two second plug-in and pull-out pin mechanisms are used to drive the corresponding cylinder pins to synchronously perform plug-in and pull-out actions along the first direction; and

[0010] An interlocking linkage mechanism, one end of which is connected to the first plug-in pin mechanism and the other end of which is inserted into the base. The interlocking linkage mechanism, driven by the first plug-in pin mechanism, approaches or moves away from the second plug-in pin mechanism along a second direction, and is used to form an interlocking cooperation with the second plug-in pin mechanism to prevent the first plug-in pin mechanism and the second plug-in pin mechanism from performing the pin pulling action at the same time.

[0011] As a further improvement of the above technical solution:

[0012] In combination with the first aspect, in a possible implementation manner, the first plug-in pin mechanism includes:

[0013] A bracket, arranged on the base;

[0014] Two pin-pulling rod groups are hinged to opposite sides of the bracket along the first direction, one end of the two pin-pulling rod groups close to the base is respectively connected to the interlocking linkage mechanism, and one end of the two pin-pulling rod groups away from the base is respectively used to connect the two arm pins;

[0015] A linkage connecting rod, respectively hingedly connected to the two pin pulling rod groups, for linking the two pin pulling rod groups; and

[0016] The first driving component is arranged on the bracket, and the output end of the first driving component is hingedly connected to one of the pin pulling rod groups. Under the action of the linkage connecting rod, the first driving component is used to drive the ends of the two pin pulling rod groups away from the base to move closer to or away from each other along the first direction.

[0017] In combination with the first aspect, in a possible implementation, both ends of the linkage link are respectively hinged to the two pin pulling rod groups at a first hinge point and a second hinge point, wherein the first hinge point is located at a section of the corresponding pin pulling rod group close to the interlocking linkage mechanism, and the second hinge point is located at a section of the corresponding pin pulling rod group away from the interlocking linkage mechanism.

[0018] In combination with the first aspect, in a possible implementation manner, the first plug-in pin mechanism further includes a first reset member, and the first reset member is disposed on the first drive assembly;

[0019] The first driving assembly is located between the two pin pulling rod groups, and is used to output telescopic movement in a linear direction. The first restoring member is used to drive the first driving assembly to return to a contracted state.

[0020] In combination with the first aspect, in a possible implementation manner, the interlocking linkage mechanism includes two groups of interlocking linkage assemblies, and each group of the interlocking linkage assemblies includes:

[0021] A transmission connecting rod connected to the first plug-in pin mechanism; and

[0022] A piston connecting rod, hinged to an end of the transmission connecting rod away from the first plug-in and pull-out pin mechanism;

[0023] Wherein, the base is provided with a guide hole along the second direction, the piston connecting rod is movably arranged in the guide hole, and under the drive of the first plug-in pin mechanism, the piston connecting rod and the second plug-in pin mechanism form an interlocking fit.

[0024] In combination with the first aspect, in a possible implementation manner, the base is provided with two mounting holes along the first direction, and the openings of the two mounting holes are away from each other;

[0025] Wherein, the two mounting holes are connected to the corresponding guide holes, and the mounting holes are used to accommodate the second plug-in pin mechanism.

[0026] In combination with the first aspect, in a possible implementation manner, the second plug-in pin mechanism includes a second drive assembly, which is disposed in a mounting hole disposed on the base, and an output end of the second drive assembly is connected to the cylinder pin to drive the cylinder pin to extend and retract in the mounting hole;

[0027] Wherein, when the cylinder pin is in an extended state, the mounting hole can be inserted into the interlocking linkage mechanism so that the first plug-in pin mechanism can perform plug-in and pull-out actions, and the interlocking linkage mechanism inserted into the mounting hole is used to limit the retraction of the cylinder pin; when the cylinder pin is in a retracted state, the cylinder pin is used to block the interlocking linkage mechanism from being inserted into the mounting hole, so that the first plug-in pin mechanism is restricted from performing plug-in and pull-out actions.

[0028] In combination with the first aspect, in a possible implementation manner, the second plug-in pin mechanism further includes a second reset member, and the second reset member is disposed on the second drive assembly;

[0029] The second driving assembly is used to output telescopic movement in a linear direction, and the second restoring member is used to drive the second driving assembly to return to an extended state.

[0030] To achieve the above-mentioned purpose, in a second aspect, the present application further provides a boom assembly, comprising a telescopic boom and a plug-in pin device provided according to the above-mentioned first aspect, wherein the plug-in pin device is arranged in the telescopic boom.

[0031] To achieve the above-mentioned purpose, in a third aspect, the present application also provides an engineering machinery, including the boom assembly provided in the above-mentioned second aspect.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present application provides a pin plugging and pulling device, an arm assembly and engineering machinery, wherein the pin plugging and pulling device realizes the back and forth switching of the plugging and pulling states of the arm pin and the cylinder pin through the first pin plugging and pulling mechanism and the second pin plugging and pulling mechanism, and realizes the interlocking function of the first pin plugging and pulling mechanism and the second pin plugging and pulling mechanism through the interlocking connecting rod mechanism, so as to ensure that the first pin plugging and pulling mechanism and the second pin plugging and pulling mechanism do not perform the pin pulling action at the same time. In the pin plugging and pulling device provided by the present application, since the structure of the interlocking connecting rod mechanism is relatively simple, the parts in the pin plugging and pulling device are reduced, and the interlocking connecting rod mechanism is a purely mechanical structure, which further improves the reliability of the pin plugging and pulling device and makes installation and maintenance more convenient. At the same time, the reduction of parts in the pin plugging and pulling device can indirectly reduce the overall design size of the pin plugging and pulling device, thereby saving installation space. In addition, the processing technology requirements of the interlocking connecting rod mechanism are not high, thereby reducing the manufacturing cost.

[0034] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0036] Figure 1 A schematic diagram of the three-dimensional structure of a pin insertion and extraction device provided in an embodiment of the present application is shown;

[0037] Figure 2 Shows Figure 1 A cross-sectional view of the pin insertion and extraction device shown;

[0038] Figure 3 A schematic diagram showing a state of pulling out an arm pin of a pin inserting and pulling device in an arm support assembly provided by an embodiment of the present application is shown;

[0039] Figure 4 A schematic diagram showing the state of a cylinder pin pulling device in a boom assembly provided in an embodiment of the present application is shown.

[0040] Description of reference numerals:

[0041] 100, pin insertion and extraction device; 110, base; 120, first pin insertion and extraction mechanism; 121, bracket; 1210, guide hole; 1211, mounting hole; 122, pin extraction rod group; 1220, first hinge point; 1221, second hinge point; 123, linkage connecting rod; 124, first drive assembly; 125, first reset member; 130, interlocking connecting rod mechanism; 131, transmission connecting rod; 132, piston connecting rod; 140, second pin insertion and extraction mechanism; 141, second drive assembly; 142, second reset member;

[0042] 200, arm pin;

[0043] 300, cylinder pin;

[0044] 400, telescopic boom;

[0045] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0046] The specific implementation of the embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present application, and is not used to limit the embodiment of the present application.

[0047] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0048] In the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0052] Example

[0053] See also Figure 1 , Figure 2 and Figure 3 The present embodiment provides a pin plugging and pulling device 100, which is applied to a boom assembly. The pin plugging and pulling device 100 is used to realize the plugging and pulling action of an arm pin 200 and a cylinder pin 300 in the boom assembly.

[0054] In this embodiment, the pin insertion device 100 includes a base 110 , a first pin insertion mechanism 120 , an interlocking linkage mechanism 130 and two second pin insertion mechanisms 140 . The first pin insertion mechanism 120 , the interlocking linkage mechanism and the two second pin insertion mechanisms 140 are all disposed on the base 110 .

[0055] The first plugging and pulling pin mechanism 120 is used to simultaneously drive two oppositely arranged arm pins 200 in the arm support assembly along the first direction X to perform plugging and pulling actions.

[0056] The two second plugging and pulling pin mechanisms 140 are disposed on the base 110 away from each other. The two second plugging and pulling pin mechanisms 140 are respectively provided with cylinder pins 300. The two second plugging and pulling pin mechanisms 140 are used to drive the corresponding cylinder pins 300 to synchronously perform plugging and pulling actions along the first direction X.

[0057] One end of the interlocking link mechanism 130 is connected to the first plug-in pin mechanism 120, and the other end of the interlocking link mechanism 130 is inserted into the base 110. The interlocking link mechanism 130 is driven by the first plug-in pin mechanism 120 to move closer to or farther from the second plug-in pin mechanism 140 along the second direction Y, and is used to form an interlocking match with the second plug-in pin mechanism 140 to prevent the first plug-in pin mechanism 120 and the second plug-in pin mechanism 140 from performing the pin removal action at the same time. In this embodiment, the second direction Y is perpendicular to the first direction X.

[0058] Therefore, the pin plugging and pulling device 100 provided in this embodiment realizes the back-and-forth switching of the plugging and pulling states of the arm pin 200 and the cylinder pin 300 through the first plugging and pulling pin mechanism 120 and the second plugging and pulling pin mechanism 140, and realizes the interlocking function of the first plugging and pulling pin mechanism 120 and the second plugging and pulling pin mechanism 140 through the interlocking connecting rod mechanism 130 to ensure that the first plugging and pulling pin mechanism 120 and the second plugging and pulling pin mechanism 140 do not perform the pin pulling action at the same time.

[0059] That is to say, when the first pin plugging and pulling mechanism 120 performs the pin pulling action, under the action of the interlocking link mechanism 130, the second pin plugging and pulling mechanism 140 is restricted from performing the pin pulling action; when the second pin plugging and pulling mechanism 140 performs the pin pulling action, under the action of the interlocking link mechanism 130, the first pin plugging and pulling mechanism 120 is restricted from performing the pin pulling action, thereby ensuring that the first pin plugging and pulling mechanism 120 and the second pin plugging and pulling mechanism 140 do not perform the pin pulling action at the same time, but does not prevent the first pin plugging and pulling mechanism 120 and the second pin plugging and pulling mechanism 140 from performing the pinning action at the same time, thereby ensuring the normal operation of the arm assembly.

[0060] Compared with the prior art, the structure of the interlocking link mechanism 130 in the plug-in and pull-out pin device 100 provided in this embodiment is relatively simple, so the number of parts in the plug-in and pull-out pin device 100 is reduced, and the interlocking link mechanism 130 is a purely mechanical structure, which further improves the reliability of the plug-in and pull-out pin device 100 and makes installation and maintenance more convenient. At the same time, the reduction of parts in the plug-in and pull-out pin device 100 can indirectly reduce the overall design size of the plug-in and pull-out pin device 100, thereby saving installation space. In addition, the processing technology requirements of the interlocking link mechanism 130 are not high, thereby reducing the manufacturing cost.

[0061] See also Figure 1 , Figure 2 and Figure 3 Specifically, in this embodiment, the first pin insertion and extraction mechanism 120 includes a bracket 121, two pin extraction rod groups 122, a linkage connecting rod 123 and a first driving assembly 124. The bracket 121 is disposed on the base 110, and the bracket 121 is exposed outside the base 110.

[0062] The two pin pulling rod groups 122 are hinged to opposite sides of the bracket 121 along the first direction X, so that the pin pulling rod groups 122 can rotate around the hinge point. Figure 2 As shown, the two pin pulling rod groups 122 are arranged symmetrically along the first direction X. In this embodiment, both ends of the pin pulling rod groups 122 extend away from the hinge point. The ends of the two pin pulling rod groups 122 close to the base 110 are respectively connected to the interlocking link mechanism 130, and the ends of the two pin pulling rod groups 122 away from the base 110 are respectively used to connect the two arm pins 200.

[0063] The linkage link 123 is arranged between the two pin pulling rod groups 122, and the linkage link 123 is hingedly connected to the two pin pulling rod groups 122, and obliquely pulls the two pin pulling rod groups 122 to ensure that when one of the pin pulling rod groups 122 rotates, the linkage link 123 can drive the other pin pulling rod group 122 to rotate, and make the rotation directions of the two pin pulling rod groups 122 opposite.

[0064] Specifically, the two ends of the linkage link 123 are respectively hinged to the two pin pulling rod groups 122 at a first hinge point 1220 and a second hinge point 1221, wherein the first hinge point 1220 is located at a section of the corresponding pin pulling rod group 122 close to the interlocking linkage mechanism 130 (i.e., from the hinge point of the pin pulling rod group 122 and the bracket 121 to the end of the pin pulling rod group 122 close to the interlocking linkage mechanism 130), and the second hinge point 1221 is located at a section of the corresponding pin pulling rod group 122 away from the interlocking linkage mechanism 130 (i.e., from the hinge point of the pin pulling rod group 122 and the bracket 121 to the end of the pin pulling rod group 122 away from the interlocking linkage mechanism 130).

[0065] The first driving assembly 124 is disposed on the bracket 121 and between the two pin pulling rod groups 122. The output end of the first driving assembly 124 is hinged to one of the pin pulling rod groups 122, and the hinge point is located at a section of the pin pulling rod group 122 close to the base 110. The first driving assembly 124 can drive the pin pulling rod group 122 to rotate. Under the action of the linkage link 123, the first driving assembly 124 can drive the ends of the two pin pulling rod groups 122 away from the base 110 to move closer to or away from each other along the first direction X.

[0066] It can be understood that since the ends of the two pin pulling rod groups 122 away from the base 110 are respectively used to connect the two arm pins 200, when the ends of the two pin pulling rod groups 122 away from the base 110 approach each other along the first direction X, the two arm pins 200 can be driven to move closer to each other so that the arm pins 200 are pulled out of the corresponding pin holes, thereby realizing the pin pulling action; when the ends of the two pin pulling rod groups 122 away from the base 110 move away from each other along the first direction X, the two arm pins 200 can be driven away from each other so that the arm pins 200 are inserted into the corresponding pin holes, thereby realizing the pin insertion action.

[0067] The first drive assembly 124 can output telescopic motion in a linear direction, so in some embodiments, the first drive assembly 124 can be selected as an oil cylinder, an air cylinder, an electric push rod, an electric cylinder or a linear motor, etc. In this embodiment, in order to improve the driving stability and higher driving force, the first drive assembly 124 is selected as an oil cylinder.

[0068] Furthermore, in some embodiments, the first pin insertion and extraction mechanism 120 further includes a first reset member 125, which is disposed on the first driving assembly 124. The first driving assembly 124 is selected to be a cylinder, that is, when the first driving assembly 124 is depressurized, the first reset member 125 is used to drive the first driving assembly 124 to restore the contracted state, so that the ends of the two pin extraction rod groups 122 away from the base 110 are away from each other, so that the arm pin 200 is inserted into the corresponding pin hole, thereby improving the stability of the arm assembly and saving power.

[0069] Optionally, the first restoring member 125 may be a tension spring.

[0070] The interlocking link mechanism 130 comprises two groups of interlocking link assemblies, each of which is connected to a pin pulling rod assembly 122, so that the rotation of the pin pulling rod assembly 122 can drive the interlocking link assembly to move.

[0071] Furthermore, each group of interlocking connecting rod assemblies includes a transmission connecting rod 131 and a piston connecting rod 132, one end of the transmission connecting rod 131 is hingedly connected to the pin pulling rod group 122 in the first pin plugging and pulling mechanism 120, and the other end of the transmission connecting rod 131 is hingedly connected to the piston connecting rod 132. The base 110 is provided with a guide hole 1210 along the second direction Y, and the piston connecting rod 132 is movably arranged in the guide hole 1210. Thus, the first driving assembly 124, the pin pulling rod group 122, the transmission connecting rod 131 and the piston connecting rod 132 together form a crank slider mechanism, that is, the rotation of the pin pulling rod group 122 can drive the piston connecting rod 132 to slide in the guide hole 1210 through the transmission connecting rod 131. Thus, the piston connecting rod 132 can form an interlocking match with the second pin plugging and pulling mechanism 140.

[0072] It can be understood that since there are two interlocking link assemblies, two guide holes 1210 are correspondingly provided on the base 110 .

[0073] The base 110 is provided with two mounting holes 1211 along the first direction X, the openings of the two mounting holes 1211 are away from each other, and the mounting holes 1211 are used to accommodate the second plug-in pin mechanism 140. The two mounting holes 1211 are connected to the corresponding guide holes 1210, so that the piston connecting rod 132 can be inserted to form an interlocking fit with the second plug-in pin mechanism 140.

[0074] The second pin plugging and pulling mechanism 140 includes a second drive assembly 141, which is disposed in the mounting hole 1211. The output end of the second drive assembly 141 is connected to the cylinder pin 300, and is used to drive the cylinder pin 300 to extend and retract in the mounting hole 1211 to realize the plugging and pulling operations of the cylinder pin 300.

[0075] Please also read Figure 4, wherein it can be understood that, since the mounting hole 1211 is connected to the guide hole 1210, when the cylinder pin 300 is in the extended state, the mounting hole 1211 can be inserted into the interlocking link mechanism 130, so that the first plug-in and pull-out pin mechanism 120 can perform the plug-in and pull-out action, and the interlocking link mechanism 130 inserted into the mounting hole 1211 occupies the retracted stroke of the cylinder pin 300, restricting the retraction of the cylinder pin 300, thereby preventing the second plug-in and pull-out pin mechanism 140 from performing the pull-out action. When the cylinder pin 300 is in the retracted state, the cylinder pin 300 can block the connection between the guide hole 1210 and the mounting hole 1211, thereby blocking the interlocking link mechanism 130 from being inserted into the mounting hole 1211, so that the first plug-in and pull-out pin mechanism 120 is restricted from performing the plug-in and pull-out action.

[0076] Further, the second drive component 141 can output telescopic motion in a linear direction, so in some embodiments, the second drive component 141 can be selected as an oil cylinder, an air cylinder, an electric push rod, an electric cylinder or a linear motor, etc. In this embodiment, in order to improve the driving stability and higher driving force, the second drive component 141 is selected as an oil cylinder.

[0077] In some embodiments, the second pin insertion and extraction mechanism 140 further includes a second reset member 142, which is disposed on the second drive assembly 141. The second drive assembly 141 is selected to be a cylinder, and the second reset member 142 drives the second drive assembly 141 to restore the extended state after the cylinder is depressurized, so that the cylinder pin 300 is inserted into the corresponding pin hole, thereby improving the stability of the arm assembly and saving power.

[0078] Optionally, the second restoring member 142 is selected to be a compression spring.

[0079] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , and combined with the above, the working principle of the pin insertion and extraction device 100 provided in this embodiment is as follows:

[0080] (1) The action process of inserting the arm pin 200 and the cylinder pin 300: When the arm pin 200 is inserted, the output end of the first driving assembly 124 retracts, driving the corresponding pin pulling rod group 122 to rotate clockwise, and at the same time, the linkage connecting rod 123 drives the other pin pulling rod group 122 to rotate counterclockwise, so that the ends of the two pin pulling rod groups 122 away from the base 110 move away from each other along the first direction X, so as to drive the arm pin 200 to be inserted into the corresponding pin hole, and complete the action of inserting the arm pin 200. At the same time, the rotation of the pin pulling rod group 122 will drive the piston connecting rod 132 to move along the second direction Y toward the direction of pulling out the guide hole 1210 through the transmission connecting rod 131. During this process, the movement of the piston connecting rod 132 will not be hindered, and when the arm pin 200 is fully inserted into the corresponding pin hole, the piston connecting rod 132 is at least partially still inserted in the guide hole 1210.

[0081] The extension of the output end of the first driving component 124 may be active, or may be driven to extend by the first restoring member 125 after the first driving component 124 (selected as a cylinder) is depressurized.

[0082] When the cylinder pin 300 is inserted, the output end of the second driving assembly 141 extends, thereby driving the corresponding cylinder pin 300 to extend, so that the cylinder pin 300 is inserted into the corresponding pin hole, completing the action of inserting the cylinder pin 300.

[0083] The extension of the output end of the second driving component 141 may be active, or may be driven to extend by the second restoring member 142 after the second driving component 141 (selected as a cylinder) is depressurized.

[0084] As can be seen from the above, when the arm pin 200 and the cylinder pin 300 are executing actions, the first pin insertion and extraction mechanism 120 and the second pin insertion and extraction mechanism 140 in the pin insertion and extraction device 100 complete the actions independently without interfering with each other.

[0085] (2) The action process of inserting the cylinder pin 300 and pulling out the arm pin 200: For the action of inserting the cylinder pin 300, please refer to the description in (1) above. When pulling out the arm pin 200, the cylinder pin 300 is inserted into the corresponding pin hole. At this time, the output end of the first drive component 124 extends out, driving the corresponding pin pulling rod group 122 to rotate counterclockwise. At the same time, the linkage connecting rod 123 drives the other pin pulling rod group 122 to rotate clockwise, so that the ends of the two pin pulling rod groups 122 away from the base 110 approach each other along the first direction X, so as to drive the arm pin 200 to be pulled out of the corresponding pin hole, completing the action of pulling out the arm pin 200. At the same time, the rotation of the pin pulling rod group 122 will drive the piston connecting rod 132 to move along the second direction Y toward the direction of the guide hole 1210 through the transmission connecting rod 131. During this process, since the guide hole 1210 is connected with the mounting hole 1211 and the cylinder pin 300 is in an extended state, the piston connecting rod 132 can be smoothly inserted into the mounting hole 1211. Therefore, the stroke of the piston rod inserted into the mounting hole 1211 corresponds to the stroke of the output end of the first drive component 124 extending when the arm pin 200 is pulled out.

[0086] Furthermore, after the piston rod is inserted into the mounting hole 1211 , it will press against the cylinder pin 300 , thereby limiting the retraction stroke of the cylinder pin 300 , thereby preventing the cylinder pin 300 from withdrawing from the corresponding pin hole.

[0087] If the cylinder pin 300 is in a pulled-out state, that is, the cylinder pin 300 is retracted into the mounting hole 1211, the cylinder pin 300 will block the connection between the guide hole 1210 and the mounting hole 1211, thereby preventing the insertion of the piston connecting rod 132 and limiting the stroke of the piston connecting rod 132. Indirectly, the stroke of the output end of the first drive component 124 is also limited, so the arm pin 200 cannot be pulled out.

[0088] (3) The action process of inserting the arm pin 200 and pulling the cylinder pin 300: Please refer to the description in (1) above for the action of inserting the arm pin 200. When pulling the cylinder pin 300, at this time, the output end of the second driving component 141 drives the cylinder pin 300 to retract. Since the arm pin 200 is inserted into the corresponding pin hole, the piston connecting rod 132 is not inserted into the mounting hole 1211, so the cylinder pin 300 can be fully retracted, completing the action of pulling the cylinder pin 300.

[0089] If the arm pin 200 is in a pulled-out state, the piston connecting rod 132 will be correspondingly inserted into the mounting hole 1211, and the cylinder pin 300 cannot be retracted, so that the action of pulling out the cylinder pin 300 cannot be completed.

[0090] Compared with the prior art, the pin insertion and extraction device 100 provided in this embodiment has the following advantages:

[0091] 1. The pin insertion and extraction device 100 provided in this embodiment is mainly composed of a connecting rod, has a simple structure, does not require a high processing technology, and reduces the manufacturing cost;

[0092] 2. The pin insertion and extraction device 100 realizes the interlocking of the pin extraction through the interlocking link mechanism 130, which is safe, reliable and practical;

[0093] 3. The pin insertion and extraction device 100 adopts an interlocking link mechanism 130 to realize pin extraction interlocking, which saves a large number of parts, can be designed with a smaller size, saves installation space, and is easy to install and maintain;

[0094] 4. The pin plugging and pulling device 100 realizes the pin plugging and pulling action and the interlocking function by mechanical means, which can realize the precise positioning of the arm pin 200 and limit the cylinder pin 300, and is stable and reliable.

[0095] Furthermore, this embodiment also provides a boom assembly, which includes a telescopic boom 400 and the above-mentioned pin insertion and extraction device 100, which is disposed in the telescopic boom 400 and is used to control the insertion and extraction of the cylinder pin 300 and the arm pin 200 in the telescopic boom 400.

[0096] This embodiment also provides a construction machinery, including the boom assembly provided above.

[0097] The engineering machinery may be a crane or a wall drill, etc. It should be understood that the above is only an example and is not intended to limit the scope of protection of this application.

[0098] The above describes in detail the optional implementation methods of the embodiments of the present application in combination with the accompanying drawings. However, the embodiments of the present application are not limited to the specific details in the above implementation methods. Within the technical concept of the embodiments of the present application, various simple modifications can be made to the technical scheme of the embodiments of the present application, and these simple modifications all belong to the protection scope of the embodiments of the present application.

[0099] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present application will not further describe various possible combinations.

[0100] In addition, the various implementation methods of the embodiments of the present application may be arbitrarily combined, and as long as they do not violate the ideas of the embodiments of the present application, they should also be regarded as the contents disclosed in the embodiments of the present application.

Claims

1. A pin insertion and extraction device, It is characterized in that Applied to a boom assembly, the pin insertion and extraction device (100) comprises: Base (110); A first plugging and pulling pin mechanism (120) is arranged on the base (110), and the first plugging and pulling pin mechanism (120) is used to simultaneously drive two arm pins (200) arranged opposite to each other in the arm support assembly along a first direction (X) to perform a plugging and pulling action; Two second plugging and pulling pin mechanisms (140) are disposed on the base (110) away from each other, and the two second plugging and pulling pin mechanisms (140) are respectively provided with cylinder pins (300), and the two second plugging and pulling pin mechanisms (140) are used to drive the corresponding cylinder pins (300) to synchronously perform plugging and pulling actions along a first direction (X); and an interlocking link mechanism (130), one end of which is connected to the first plug-in pin mechanism (120), and the other end of which is inserted into the base (110); the interlocking link mechanism (130) is driven by the first plug-in pin mechanism (120) to move closer to or farther away from the second plug-in pin mechanism (140) along a second direction (Y), and is used to form an interlocking cooperation with the second plug-in pin mechanism (140), so as to prevent the first plug-in pin mechanism (120) and the second plug-in pin mechanism (140) from performing a pin pulling action at the same time; The second pin plugging and pulling mechanism (140) comprises a second driving component (141) which is arranged in a mounting hole (1211) arranged on the base (110); an output end of the second driving component (141) is connected to the cylinder pin (300) and is used to drive the cylinder pin (300) to extend and retract in the mounting hole (1211); Wherein, when the cylinder pin (300) is in an extended state, the mounting hole (1211) is available for the insertion of the interlocking link mechanism (130) so that the first plug-in pin mechanism (120) can perform plug-in and pull-out actions, and the interlocking link mechanism (130) inserted into the mounting hole (1211) is used to limit the retraction of the cylinder pin (300); when the cylinder pin (300) is in a retracted state, the cylinder pin (300) is used to block the interlocking link mechanism (130) from being inserted into the mounting hole (1211) so that the first plug-in pin mechanism (120) is limited from performing plug-in and pull-out actions.

2. The plug-in and pull-out pin device according to claim 1, It is characterized in that The first plug-in / pull-out pin mechanism (120) comprises: A bracket (121) is arranged on the base (110); Two pin-pulling rod groups (122) are hinged to opposite sides of the bracket (121) along the first direction (X), one end of the two pin-pulling rod groups (122) close to the base (110) is respectively connected to the interlocking link mechanism (130), and one end of the two pin-pulling rod groups (122) away from the base (110) is respectively used to connect the two arm pins (200); A linkage connecting rod (123) is respectively hingedly connected to the two pin pulling rod groups (122) to enable the two pin pulling rod groups (122) to be linked; and The first driving component (124) is arranged on the bracket (121). The output end of the first driving component (124) is hinged to one of the pin pulling rod groups (122). Under the action of the linkage connecting rod (123), the first driving component (124) is used to drive the ends of the two pin pulling rod groups (122) away from the base (110) to approach or move away from each other along the first direction (X).

3. The plugging and unplugging pin device according to claim 2, wherein, Both ends of the linkage connecting rod (123) are respectively hinged to the two pin pulling rod groups (122) at a first hinge point (1220) and a second hinge point (1221). Among them, the first hinge point (1220) is located on a section of the corresponding pin pulling rod group (122) close to the interlocking linkage mechanism (130), and the second hinge point (1221) is located on a section of the corresponding pin pulling rod group (122) away from the interlocking linkage mechanism (130).

4. The plugging and unplugging pin device according to claim 2, wherein, The first plugging and unplugging pin mechanism (120) further includes a first reset member (125), and the first reset member (125) is arranged on the first driving component (124); Among them, the first driving component (124) is located between the two pin pulling rod groups (122). The first driving component (124) is used to output a telescopic motion in a linear direction, and the first reset member (125) is used to drive the first driving component (124) to restore its contracted state.

5. The plugging and unplugging pin device according to claim 1, wherein, The interlocking linkage mechanism (130) includes two groups of interlocking linkage components. Each group of interlocking linkage components includes: A transmission connecting rod (131), which is connected to the first plugging and unplugging pin mechanism (120); and A piston connecting rod (132), which is hinged to one end of the transmission connecting rod (131) away from the first plugging and unplugging pin mechanism (120); Among them, the base (110) is provided with a guiding hole (1210) along the second direction (Y). The piston connecting rod (132) is movably arranged in the guiding hole (1210), and under the drive of the first plugging and unplugging pin mechanism (120), the piston connecting rod (132) forms an interlocking fit with the second plugging and unplugging pin mechanism (140).

6. The plugging and unplugging pin device according to claim 5, wherein, The base (110) is provided with two mounting holes (1211) along the first direction (X), and the openings of the two mounting holes (1211) face away from each other; Among them, the two mounting holes (1211) are communicated with the corresponding guiding hole (1210), and the mounting holes (1211) are used to accommodate the second plugging and unplugging pin mechanism (140).

7. The plugging and unplugging pin device according to claim 1, wherein, The second plugging and unplugging pin mechanism (140) further includes a second reset member (142), and the second reset member (142) is arranged on the second driving component (141); The second driving component (141) is used to output telescopic movement in a linear direction, and the second restoring member (142) is used to drive the second driving component (141) to restore the extended state.

8. A boom assembly, It is characterized in that It comprises a telescopic arm (400) and a pin plugging and extracting device (100) according to any one of claims 1 to 7, wherein the pin plugging and extracting device (100) is arranged in the telescopic arm (400).

9. A construction machine, It is characterized in that Comprising the boom assembly according to claim 8.

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