Arm pin inserting and pulling device and crane

Abstract

The utility model relates to the technical field of engineering machinery, and discloses an arm pin inserting and pulling device and a crane. The arm pin inserting and pulling device comprises mounting seats suitable for being fixedly connected to a basic arm of the cargo boom, and the mounting seats are equal to first pin shaft holes in the basic arm in number and correspond to the first pin shaft holes in a one-to-one mode; the number of the driving parts is equal to that of the mounting seats, the driving parts and the mounting seats are in one-to-one correspondence, each driving part comprises a fixed part and a telescopic part, the fixed parts are connected to the corresponding mounting seats, the telescopic parts are connected to the sides, close to the first pin shaft holes, of the fixed parts, and the telescopic parts selectively stretch out and draw back relative to the fixed parts; the telescopic direction of the telescopic part coincides with the center line of the first pin shaft hole, and the telescopic part is suitable for driving the pin shaft to be inserted into and pulled out of the first pin shaft hole. The driving parts are not directly connected with the telescopic arm, the pin shafts can be inserted and pulled without depending on stretching and retracting of the cargo boom, use is convenient, each driving part can independently control insertion and pulling of the corresponding pin shaft, and the convenience of disassembling and assembling the pin shafts is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an arm pin plugging and pulling device and a crane. Background Art

[0002] Cranes, as a common type of construction machinery, are widely used in industries such as wind power, nuclear power, and the chemical industry. With the development of these industries, the demand for large-tonnage cranes is increasing. The boom is the core component of the crane's lifting mechanism, so the requirements for the boom's lifting height and lifting load are becoming increasingly higher. Currently, a superlift device has been added to the boom to address problems such as large disturbances and poor stability caused by the increase in boom length and load. The superlift device is connected to the basic boom of the boom by a pin, and the superlift device and the boom can be disassembled and assembled by plugging and unplugging the pin to meet the crane's operation and movement requirements.

[0003] Conventional pin removal devices for inserting and removing pins typically have one end fixedly connected to the telescopic boom section of the boom and the other end connected to the pin, utilizing the boom's telescopic motion to insert or remove the pin. However, this pin removal device relies on the boom's telescopic function. If the boom cannot be extended due to, for example, a long jib or a malfunctioning telescopic cylinder, the pin must be manually removed and installed, which is inconvenient. Utility Model Content

[0004] In view of this, the utility model provides an arm pin insertion and extraction device and a crane to solve the problem that the pin insertion and extraction device is inconvenient to use because it relies on the telescopic function of the crane arm.

[0005] In the first aspect, the utility model provides an arm pin insertion and extraction device, comprising: a mounting seat, suitable for being fixedly connected to the basic arm of the lifting arm, the number of the mounting seats being equal to and corresponding to the number of first pin shaft holes on the basic arm; a driving member, the number of the driving members being equal to and corresponding to the number of the mounting seats, each of the driving members comprising a fixed part and a telescopic part, the fixed part being connected to the mounting seat corresponding thereto, the telescopic part being connected to a side of the fixed part close to the first pin shaft hole, the telescopic part being selectively telescopic relative to the fixed part, the telescopic direction of the telescopic part coinciding with the center line of the first pin shaft hole, the telescopic part being suitable for driving the pin shaft to be inserted and extracted in the first pin shaft hole.

[0006] The cam is fixedly connected to the base arm of the lifting arm and the fixing part of the driving member is connected to the mounting seat, so that the fixing part is fixed relative to the basic arm, and the telescopic part is located on the side of the fixing part close to the first pin shaft hole and the telescopic direction of the telescopic part coincides with the center line of the first pin shaft hole. The telescopic part is telescopically extended relative to the fixing part to drive the pin shaft to move along the telescopic direction of the telescopic part, thereby realizing the insertion and removal of the pin shaft in the first pin shaft hole. The driving member is not directly connected to the telescopic arm and can realize the insertion and removal of the pin shaft without relying on the extension and retraction of the lifting arm. The structure is compact and easy to use. By setting the number of mounting seats and the number of driving members to be equal to the number of first pin shaft holes, each set of mounting seats and driving members corresponds to a first pin shaft hole and a pin shaft, and each driving member can independently control the insertion and removal of the corresponding pin shaft, further improving the convenience of disassembly and assembly of the pin shaft. The simultaneous operation of multiple driving members can realize the simultaneous disassembly and assembly of multiple pin shafts, which is conducive to improving work efficiency.

[0007] In an optional embodiment, the mounting base includes: a fixing frame fixedly connected to the basic arm; a mounting plate fixedly connected to the fixing frame, a mounting hole being provided on the mounting plate, a center line of the mounting hole coinciding with a center line of the first pin shaft hole, the fixing portion being installed on a side of the mounting plate away from the first pin shaft hole, and the telescopic portion passing through the mounting hole and being suitable for telescoping along the center line of the mounting hole.

[0008] Beneficial effect: By setting a fixing frame of the mounting seat and fixing it with the basic arm, a stable connection between the mounting seat and the basic arm is achieved; by fixing the mounting plate on the fixing frame and installing the fixing part of the driving member on the mounting plate, the connection between the driving member and the mounting seat is achieved, thereby achieving relative fixation of the driving member and the basic arm; at the same time, by opening a mounting hole on the mounting plate, the fixing part is located on the side of the mounting plate away from the first pin shaft hole, and the telescopic part extends through the mounting hole to the side of the mounting plate facing the first pin shaft hole, which is convenient for the telescopic part to drive the pin shaft to move; and when the telescopic part extends out of the fixing part, the mounting seat is located near the middle of the entire driving member, so that the installation stability of the driving member is good and the structure is compact.

[0009] In an optional embodiment, the mounting seat further includes: a reinforcing rib connected between the fixing frame and the mounting plate.

[0010] Beneficial effect: By arranging reinforcing ribs between the fixing frame and the mounting plate, the stability of the connection between the mounting plate and the fixing frame and the structural strength of the entire mounting seat are further increased, thereby further improving the stability and reliability of the support for the driving member.

[0011] In an optional embodiment, a first connecting plate is provided on one end of the fixing portion close to the mounting plate. The first connecting plate is annular and is connected to the outer peripheral side of the fixing portion. The first connecting plate is connected to the mounting plate.

[0012] Beneficial effect: By arranging a first connecting plate on one end of the fixing part close to the mounting plate, the fixing part is connected to the mounting plate through the first connecting plate, which improves the convenience of connecting the fixing part and the mounting plate and the stability after connection, thereby improving the reliability of the entire arm pin plugging and pulling device.

[0013] In an optional embodiment, a first connecting hole is provided on the first connecting plate, and a second connecting hole corresponding to the first connecting hole is provided on the mounting plate. The arm pin plugging and pulling device also includes a first connecting member, which is passed through the first connecting hole and the second connecting hole to fixedly connect the first connecting plate and the mounting plate.

[0014] Beneficial effect: By opening a first connecting hole on the first connecting plate and opening a second connecting hole corresponding to the first connecting hole on the mounting plate, and passing a first connecting member through the first connecting hole and the second connecting hole, the first connecting plate and the mounting plate are detachably connected through the first connecting member, the structure is simple, disassembly and assembly are convenient, and maintenance and replacement are convenient.

[0015] In an optional embodiment, the free end of the telescopic portion is connected to a second connecting plate, and the second connecting plate is suitable for being detachably connected to the pin shaft.

[0016] Beneficial effect: By connecting the second connecting plate at the end of the telescopic part away from the fixed part, the telescopic part is detachably connected to the pin shaft through the second connecting plate. When the pin shaft needs to be plugged in or out, the second connecting plate is connected to the pin shaft to ensure that the position relationship between the telescopic part and the pin shaft is relatively stable during the telescopic process, thereby ensuring that the axis of the pin shaft can always coincide with the center line of the first pin shaft hole during the process of pushing or pulling out the pin shaft, thereby ensuring the smooth implementation of the pin shaft disassembly and assembly process.

[0017] In an optional embodiment, a third connecting hole is provided on the second connecting plate, and a fourth connecting hole corresponding to the third connecting hole is provided at one end of the pin shaft. The arm pin plugging and pulling device also includes a second connecting member, which can be selectively passed through the third connecting hole and the fourth connecting hole to fixedly connect the second connecting plate and the pin shaft.

[0018] Beneficial effect: By opening a third connecting hole on the second connecting plate, and the third connecting hole corresponds to the fourth connecting hole on the pin shaft, and the second connecting member is passed through the third connecting hole and the fourth connecting hole, the second connecting plate and the pin shaft are detachably connected through the second connecting member, that is, the detachable connection between the driving member and the pin shaft is realized, the structure is simple, disassembly and assembly are convenient, and maintenance and replacement are convenient.

[0019] In an optional embodiment, the driving member is a telescopic cylinder.

[0020] Beneficial effects: The telescopic cylinder includes a cylinder body and a telescopic rod, the fixed part is the cylinder body in the telescopic cylinder, the telescopic part is the telescopic rod in the telescopic cylinder, the axis of the telescopic cylinder coincides with the center line of the first pin shaft hole, the telescopic rod can be telescoped along the center line of the first pin shaft hole, when the telescopic rod is extended relative to the cylinder body, the pin shaft is pushed into the first pin shaft hole, and when the telescopic rod is retracted relative to the cylinder body, the pin shaft is pulled out of the first pin shaft hole. The telescopic cylinder is flexible to operate and has good stability.

[0021] In a second aspect, the present invention further provides a crane, comprising: a lifting arm having a basic arm, a boom positioning seat provided at the end of the basic arm, a first pin hole being provided on the boom positioning seat; a super-lifting device, a super-lifting positioning seat provided at the end of the super-lifting device, a second pin hole being provided on the super-lifting positioning seat, the super-lifting positioning seat corresponding to the boom positioning seat, and the second pin hole corresponding to the first pin hole; a pin selectively inserted into the first pin hole and the second pin hole to connect the basic arm with the super-lifting device; the above-mentioned arm pin insertion and extraction device, the arm pin insertion and extraction device being fixedly connected to the basic arm via a mounting seat, the telescopic portion of the driving member selectively connected to the pin to drive the pin to be inserted and extracted in the first pin hole and the second pin hole. Because the crane includes the arm pin insertion and extraction device, it has the same effect as the arm pin insertion and extraction device, and will not be described in detail here.

[0022] In an optional embodiment, the number of the super-lifting devices is two, and each of the super-lifting devices is provided with two super-lifting positioning seats, each of the super-lifting positioning seats is provided with a second pin shaft hole, and a super-lifting device is provided on each of the opposite sides of the basic arm; two arm support positioning seats are provided on each of the opposite sides of the basic arm, and each of the arm support positioning seats is provided with a first pin shaft hole; the two arm support positioning seats on each side of the basic arm correspond one-to-one to the two super-lifting positioning seats on one super-lifting device; the number of the mounting seats and the driving members are both four, the four mounting seats correspond one-to-one to the first pin shaft holes on the four arm support positioning seats, and the four driving members correspond one-to-one to the first pin shaft holes on the four arm support positioning seats.

[0023] Beneficial effects: by arranging that each super-lifting device has two super-lifting positioning seats and each super-lifting positioning seat is provided with a second pin shaft hole, two arm support positioning seats are provided on the side of the basic arm corresponding to each super-lifting device and each arm support positioning seat is provided with a first pin shaft hole, and the arm support positioning seats correspond one-to-one to the super-lifting positioning seats and are connected through a pin shaft, the relative stability of each super-lifting device and the basic arm when installed is achieved, and by setting the number of mounting seats and the number of driving members to four, the four mounting seats and the four driving members correspond one-to-one to the four first pin shaft holes, so that each driving member can individually drive a pin shaft to be inserted and removed from the first pin shaft hole and the second pin shaft hole, which is easy to operate and highly flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the installation structure of a crane arm and a single-side super-lifting device according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the installation structure of an arm pin insertion and extraction device on a basic arm according to an embodiment of the utility model;

[0027] Figure 3 for Figure 2 A partial enlarged schematic diagram of the arm pin insertion and extraction device is included;

[0028] Figure 4 This is a schematic diagram of the partial structure of the basic arm of an embodiment of the present utility model;

[0029] Figure 5 This is a structural diagram of the connection between the arm pin insertion and extraction device and the pin shaft according to an embodiment of the utility model;

[0030] Figure 6 This is a structural schematic diagram of the super-lift positioning seat of the super-lift device according to an embodiment of the present utility model.

[0031] Description of reference numerals:

[0032] 1. Mounting base; 101. Fixing bracket; 102. Mounting plate; 103. Reinforcement rib; 104. Mounting hole;

[0033] 2. Driving member; 201. Fixing portion; 202. Telescopic portion; 203. First connecting plate; 204. First connecting hole; 205. Second connecting plate; 301. First connecting member; 302. Second connecting member;

[0034] 4. Basic arm; 411. First arm support positioning seat; 412. Second arm support positioning seat; 421. First pin guide seat; 422. Second pin guide seat; 401. First pin hole; 402. Guide hole; 403. First support block; 404. Second support block;

[0035] 5. Super-lifting device; 501. Second pin hole; 511. First super-lifting positioning seat; 512. Second super-lifting positioning seat; 6. Pin. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0037] Currently, cranes are adding superlift devices to their booms to address issues such as increased jib length and load, resulting in increased disturbance and poor stability. However, the superlift devices used in cranes are also becoming increasingly heavier. To meet the demands for rapid assembly, disassembly, movement, and operation of cranes, the arm pin insertion and extraction device used to attach the boom to the superlift device needs to be safe, fast, and convenient to achieve rapid assembly and disassembly of the superlift device.

[0038] The following combination Figures 1 to 6 , describing the embodiments of the present utility model.

[0039] According to an embodiment of the present invention, on the one hand, an arm pin insertion and extraction device is provided, comprising: a mounting seat 1 and a driving member 2. The mounting seat 1 is adapted to be fixedly connected to the basic arm 4 of the crane arm, and the number of mounting seats 1 is equal to and corresponds to the number of first pin shaft holes 401 on the basic arm 4; the number of driving members 2 is equal to and corresponds to the number of mounting seats 1, and each driving member 2 comprises a fixed portion 201 and a telescopic portion 202, wherein the fixed portion 201 is connected to the corresponding mounting seat 1, and the telescopic portion 202 is connected to a side of the fixed portion 201 close to the first pin shaft hole 401, and the telescopic portion 202 can selectively extend and retract relative to the fixed portion 201, and the telescopic direction of the telescopic portion 202 coincides with the centerline of the first pin shaft hole 401, and the telescopic portion 202 is adapted to drive the pin shaft 6 to be inserted and extracted in the first pin shaft hole 401.

[0040] The arm pin insertion and extraction device of this embodiment is applied, by providing a mounting base 1 fixedly connected to the basic arm 4 of the crane arm and the fixing portion 201 of the driving member 2 is connected to the mounting base 1, so that the fixing portion 201 is fixed relative to the basic arm 4, and by providing a telescopic portion 202 located on the side of the fixing portion 201 close to the first pin shaft hole 401 and the telescopic direction of the telescopic portion 202 coincides with the center line of the first pin shaft hole 401, the telescopic portion 202 is extended relative to the fixing portion 201 to drive the pin shaft 6 to move along the telescopic direction of the telescopic portion 202, thereby realizing the pin shaft 6 in the first pin shaft hole 401. The plugging and unplugging of the driving member 2 is not directly connected to the telescopic arm, and the pin 6 can be plugged and unplugged without relying on the telescopic arm. The structure is compact and easy to use. By setting the number of mounting seats 1 and the number of driving members 2 to be equal to the number of first pin holes 401, each group of mounting seats 1 and driving members 2 corresponds to a first pin hole 401 and a pin 6. Each driving member 2 can independently control the plugging and unplugging of the corresponding pin 6, further improving the convenience of disassembly and assembly of the pin 6. Multiple driving members 2 working at the same time can realize the simultaneous disassembly and assembly of multiple pins 6, which is conducive to improving work efficiency.

[0041] It should be noted that the lifting arm includes a basic arm 4 and a telescopic arm. The telescopic arm can be extended and retracted relative to the basic arm 4. During the extension and retraction process of the telescopic arm, the basic arm 4 remains stationary; the super-lifting device 5 is detachably connected to the basic arm 4 through a pin 6. The basic arm 4 is provided with a first pin hole 401, and the super-lifting device 5 is provided with a second pin hole 501 corresponding to the first pin hole 401; usually there are two super-lifting devices 5, and the two super-lifting devices 5 are relatively arranged on both sides of the lifting arm. Each super-lifting device 5 is generally provided with two second pin holes 501, so there are four first pin holes 401 on the basic arm 4, each first pin hole 401 corresponds to a second pin hole 501, and each first pin hole 401 and the corresponding second pin hole 501 are connected by a pin 6, so there are four pins 6 in total; correspondingly, the number of mounting seats 1 and the number of driving members 2 are both four, and each driving member 2 drives a pin 6 to move, so that the pin 6 is inserted and removed from the first pin hole 401 and the second pin hole 501.

[0042] Among them, the fixed part 201 of the driving member 2 is fixedly connected to the mounting seat 1, one end of the telescopic part 202 is slidably connected to the fixed part 201 and the other end is a free end. During the telescopic part 202 telescopes relative to the fixed part 201, the free end of the telescopic part 202 moves between the fixed part 201 and the first pin shaft hole 401, thereby driving the pin shaft 6 to be inserted into or pulled out of the first pin shaft hole 401.

[0043] In one embodiment, the driving member 2 is a telescopic cylinder. The telescopic cylinder includes a cylinder body and a telescopic rod. The fixed portion 201 is the cylinder body of the telescopic cylinder, and the telescopic portion 202 is the telescopic rod of the telescopic cylinder. The axis of the telescopic cylinder coincides with the centerline of the first pin hole 401. The telescopic rod can be extended and retracted along the centerline of the first pin hole 401. When the telescopic rod is extended relative to the cylinder body, the pin 6 is pushed into the first pin hole 401. When the telescopic rod is retracted relative to the cylinder body, the pin 6 is pulled out of the first pin hole 401. The telescopic cylinder is flexible in operation and has good stability.

[0044] In one embodiment, the telescopic cylinder may be an oil cylinder, a pneumatic cylinder, or an electric cylinder.

[0045] Preferably, the telescopic cylinder is a hydraulic cylinder, which shares a hydraulic system with the crane. The hydraulic cylinder is individually controlled by a branch in the hydraulic system. The multiple hydraulic cylinders are independent of each other and do not affect each other. The pin shaft 6 is driven by the hydraulic cylinder for plugging and unplugging, which can meet the use requirements of quick disassembly and assembly of the super-lifting device 5 and the lifting arm, and has a compact structure, easy operation, high work efficiency, safety and reliability.

[0046] In one embodiment, the mounting base 1 includes a fixing frame 101 and a mounting plate 102. The fixing frame 101 is fixedly connected to the base arm 4; the mounting plate 102 is fixedly connected to the fixing frame 101. The mounting plate 102 defines a mounting hole 104, the centerline of which coincides with the centerline of the first pin hole 401. The fixing portion 201 is mounted on the mounting plate 102 on a side away from the first pin hole 401. The telescopic portion 202 extends through the mounting hole 104 and is adapted to extend and retract along the centerline of the mounting hole 104. By setting a fixing frame 101 of the mounting seat 1 and fixing it with the basic arm 4, a stable connection between the mounting seat 1 and the basic arm 4 is achieved. By fixing the mounting plate 102 on the fixing frame 101 and installing the fixing portion 201 of the driving member 2 on the mounting plate 102, the connection between the driving member 2 and the mounting seat 1 is achieved, thereby achieving relative fixation of the driving member 2 and the basic arm 4. At the same time, by opening a mounting hole 104 on the mounting plate 102, the fixing portion 201 is located on the side of the mounting plate 102 away from the first pin shaft hole 401, and the telescopic portion 202 passes through the mounting hole 104 and extends to the side of the mounting plate 102 facing the first pin shaft hole 401, so that the telescopic portion 202 drives the pin shaft 6 to move, and when the telescopic portion 202 extends out of the fixing portion 201, the mounting seat 1 is located near the middle of the entire driving member 2, so that the installation stability of the driving member 2 is good and the structure is compact.

[0047] In one embodiment, the mounting base 1 is welded to the basic arm 4 . Welding is a common connection method that is easy to process and has good stability.

[0048] In one embodiment, the mounting base 1 further includes a reinforcing rib 103 connected between the fixing frame 101 and the mounting plate 102. The provision of the reinforcing rib 103 between the fixing frame 101 and the mounting plate 102 further increases the stability of the connection between the mounting plate 102 and the fixing frame 101 and the structural strength of the entire mounting base 1, thereby further improving the stability and reliability of the support for the driver 2.

[0049] In one embodiment, the mounting plate 102 is perpendicular to the first surface of the fixing frame 101, and the reinforcing rib 103 is in the form of a right triangle, with one right-angled side of the right triangle connected to the first surface of the fixing frame 101 and the other right-angled side connected to the surface of the mounting plate 102. The first surface of the fixing frame 101 is connected to the base arm 4 and is parallel to the centerline of the base arm 4.

[0050] Preferably, the number of the reinforcing ribs 103 is four, and two reinforcing ribs 103 are respectively provided on the side of the mounting plate 102 facing the first pin shaft hole 401 and the side away from the first pin shaft hole 401, so as to further improve the structural strength and reliability of the mounting base 1.

[0051] In one embodiment, a first connecting plate 203 is provided on the end of the fixing portion 201 near the mounting plate 102. The first connecting plate 203 is annular and surrounds the outer periphery of the fixing portion 201, and is connected to the mounting plate 102. By providing the first connecting plate 203 on the end of the fixing portion 201 near the mounting plate 102, the fixing portion 201 is connected to the mounting plate 102 via the first connecting plate 203, which improves the convenience of connecting the fixing portion 201 and the mounting plate 102 and the stability of the connection, thereby improving the reliability of the entire arm pin insertion and extraction device.

[0052] In one embodiment, a first connecting hole 204 is defined on the first connecting plate 203, and a second connecting hole corresponding to the first connecting hole 204 is defined on the mounting plate 102. The arm pin insertion and extraction device further includes a first connecting member 301, which is inserted through the first connecting hole 204 and the second connecting hole to fixedly connect the first connecting plate 203 and the mounting plate 102. By defining the first connecting hole 204 on the first connecting plate 203 and the second connecting hole corresponding to the first connecting hole 204 on the mounting plate 102, and by inserting the first connecting member 301 through the first connecting hole 204 and the second connecting hole, the first connecting plate 203 and the mounting plate 102 are detachably connected via the first connecting member 301, resulting in a simple structure, easy assembly and disassembly, and convenient maintenance and replacement.

[0053] Among them, the number of first connecting holes 204 is multiple, and the multiple first connecting holes 204 are evenly spaced around the circumference of the first connecting plate 203; the number of second connecting holes is equal to the number of first connecting holes 204 and corresponds one to one, and the multiple second connecting holes are evenly spaced around the circumference of the mounting hole 104; the number of first connecting members 301 is equal to the number of first connecting holes 204, and each first connecting member 301 is inserted into a first connecting hole 204 and a second connecting hole, further increasing the stability of the connection between the first connecting plate 203 and the mounting plate 102.

[0054] In one embodiment, the first connecting member 301 is a bolt, which is common, easily available, low-cost, and has high strength and reliability. It is understood that, as an alternative embodiment, the first connecting member 301 can also be a latch, which also facilitates reliable connection between the first connecting plate 203 and the mounting plate 102.

[0055] In one embodiment, a second connecting plate 205 is connected to the free end of the telescopic portion 202, and the second connecting plate 205 is adapted to be detachably connected to the pin 6. By connecting the second connecting plate 205 to the end of the telescopic portion 202 away from the fixed portion 201, the telescopic portion 202 is detachably connected to the pin 6 via the second connecting plate 205. When the pin 6 needs to be inserted or removed, the second connecting plate 205 is connected to the pin 6, ensuring that the positional relationship between the telescopic portion 202 and the pin 6 is relatively stable during the telescopic process, thereby ensuring that the axis of the pin 6 can always coincide with the center line of the first pin hole 401 during the process of pushing or removing the pin 6, thereby ensuring smooth installation and removal of the pin 6.

[0056] In one embodiment, a third connecting hole is formed on the second connecting plate 205, and a fourth connecting hole corresponding to the third connecting hole is formed on one end of the pin 6. The arm pin insertion and extraction device further includes a second connecting member 302, which can be selectively inserted into the third connecting hole and the fourth connecting hole to fixedly connect the second connecting plate 205 and the pin 6. By forming the third connecting hole on the second connecting plate 205, and the third connecting hole corresponding to the fourth connecting hole on the pin 6, and by inserting the second connecting member 302 into the third connecting hole and the fourth connecting hole, the second connecting plate 205 and the pin 6 are detachably connected via the second connecting member 302, thereby achieving a detachable connection between the driving member 2 and the pin 6. This has a simple structure, is easy to disassemble and assemble, and is convenient for maintenance and replacement.

[0057] Among them, there are multiple fourth connecting holes, and the multiple fourth connecting holes are evenly spaced around the center line of the pin shaft 6; the number of third connecting holes is equal to the number of fourth connecting holes and corresponds one to one, and the multiple third connecting holes are evenly spaced around the circumference of the second connecting plate 205; the number of second connecting members 302 is equal to the number of third connecting holes, and each second connecting member 302 is inserted into a third connecting hole and a fourth connecting hole, thereby realizing a reliable connection between the second connecting plate 205 and the pin shaft 6.

[0058] In one embodiment, the second connecting member 302 is a bolt, which has low cost, high strength and good reliability. It is understood that as an alternative embodiment, the second connecting member 302 can also be a screw.

[0059] According to an embodiment of the present invention, on the other hand, a crane is provided, comprising: a lifting arm, a super-lifting device 5, a pin 6, and the above-mentioned arm pin insertion and extraction device. The lifting arm has a basic arm 4, a boom positioning seat is provided at the end of the basic arm 4, and a first pin hole 401 is provided on the boom positioning seat; a super-lift positioning seat is provided at the end of the super-lifting device 5, and a second pin hole 501 is provided on the super-lifting positioning seat, the super-lifting positioning seat corresponds to the boom positioning seat, and the second pin hole 501 corresponds to the first pin hole 401; the pin 6 can be selectively inserted into the first pin hole 401 and the second pin hole 501 to connect the basic arm 4 and the super-lifting device 5; the arm pin insertion and extraction device is fixedly connected to the basic arm 4 through the mounting seat 1, and the telescopic portion 202 of the driving member 2 can be selectively connected to the pin 6 to drive the pin 6 to be inserted and extracted in the first pin hole 401 and the second pin hole 501. The arm pin plug-in device is fixedly connected to the basic arm 4 of the crane arm through the mounting seat 1, and is detachably connected to the pin shaft 6 through the telescopic part 202 in the driving member 2. By connecting the telescopic part 202 with the pin shaft 6 and extending the telescopic part 202 relative to the fixed part 201, the pin shaft 6 can be pushed into the first pin shaft hole 401 and the second pin shaft hole 501, thereby realizing the connection between the super-lifting device 5 and the crane arm, or, by retracting the telescopic part 202 relative to the fixed part 201, the pin shaft 6 can be pulled out from the first pin shaft hole 401 and the second pin shaft hole 501, thereby realizing the disassembly of the super-lifting device 5 and the crane arm, thereby meeting the use requirements of quick disassembly and assembly of the super-lifting device 5 and the crane arm, and the structure is compact, the operation is convenient, the work efficiency is high, and it is safe and reliable.

[0060] In one embodiment, there are two super-lifting devices 5, each of which is provided with two super-lifting positioning seats, each of which is provided with a second pin shaft hole 501, and a super-lifting device 5 is provided on each of the opposite sides of the basic arm 4; two arm support positioning seats are provided on each of the opposite sides of the basic arm 4, each of which is provided with a first pin shaft hole 401. The two arm support positioning seats on each side of the basic arm 4 correspond one-to-one to the two super-lifting positioning seats on a super-lifting device 5; the number of mounting seats 1 and driving members 2 are both four, the four mounting seats 1 correspond one-to-one to the first pin shaft holes 401 on the four arm support positioning seats, and the four driving members 2 correspond one-to-one to the first pin shaft holes 401 on the four arm positioning seats.

[0061] By arranging that each super-lifting device 5 has two super-lifting positioning seats and each super-lifting positioning seat is provided with a second pin shaft hole 501, and two arm support positioning seats are provided on the side corresponding to each super-lifting device 5 on the basic arm 4 and each arm support positioning seat is provided with a first pin shaft hole 401, and the arm support positioning seats correspond one-to-one to the super-lifting positioning seats and are connected through a pin shaft 6, relative stability of each super-lifting device 5 and the basic arm 4 when installed is achieved, and by setting the number of mounting seats 1 and the number of driving members 2 to be four, the four mounting seats 1 and the four driving members 2 correspond one-to-one to the four first pin shaft holes 401, so that each driving member 2 can independently drive a pin shaft 6 to be plugged in and out of the first pin shaft hole 401 and the second pin shaft hole 501, which is easy to operate and highly flexible.

[0062] Specifically, the two super-lifting positioning seats on each super-lifting device 5 are respectively the first super-lifting positioning seat 511 and the second super-lifting positioning seat 512, and the first super-lifting positioning seat 511 and the second super-lifting positioning seat are arranged at intervals; the two arm positioning seats on one side of the basic arm 4 are respectively the first arm positioning seat 411 and the second arm positioning seat 412, and the first arm positioning seat 411 and the second arm positioning seat 412 are arranged at intervals; a first arm positioning seat 411 and a second arm positioning seat 412 are respectively provided on both sides of the basic arm 4, for a total of four arm positioning seats; the first super-lifting positioning seat 511 cooperates with the first arm positioning seat 411, and the second super-lifting positioning seat 512 cooperates with the second arm positioning seat 412, which is beneficial to improving the stability and reliability of the installation of the super-lifting device 5 and the boom.

[0063] There are positioning structures on the lifting arm and the super lift. During the installation process, the first arm positioning seat 411 contacts the first super lift positioning seat 511, and the second arm positioning seat 412 contacts the second super lift positioning seat 512. After appropriately adjusting the super lift center of gravity position and confirming that the first pin shaft hole 401 and the second pin shaft hole 501 are basically concentric, the pin shaft 6 can be inserted and removed.

[0064] Preferably, the driving member 2 is a hydraulic cylinder, and four hydraulic cylinders are used to insert and remove the pin shaft 6 connecting the super lifting device 5 and the lifting arm. Each pin shaft 6 can be freely inserted and removed without the need for the lifting arm to be extended or retracted, achieving the purpose of high efficiency, safety and labor saving.

[0065] In one embodiment, a pin guide seat is further provided at the end of the basic arm 4. The number of the pin guide seats is equal to and corresponds to the number of the arm support positioning seats. The pin guide seat is located between the arm support positioning seat and the mounting seat 1. A guide hole 402 corresponding to the first pin hole 401 is opened on the pin guide seat for the pin 6 to pass through. The pin guide seat provides a guide for the pin 6 to be installed in the second pin hole 501, so as to facilitate the smooth insertion of the pin 6. Specifically, a total of four pin guide seats are provided on the basic arm 4, and the four pin guide seats correspond to the four arm support positioning seats one by one. Among them, two pin guide seats are provided on a single side of the basic arm 4, namely the first pin guide seat 421 and the second pin guide seat 422. The first pin guide seat 421 corresponds to the first arm support positioning seat 411, and the second pin guide seat 422 corresponds to the second arm support positioning seat 412.

[0066] In one embodiment, a first support block 403 is provided on both the first pin guide seat 421 and the second pin guide seat 422. The first support block 403 is provided on the side of the pin guide seat away from the arm positioning seat. The first support block 403 is crescent-shaped and is provided circumferentially around the guide hole 402 to support the pin 6, thereby improving the stability of the pin 6 after installation.

[0067] In one embodiment, a second support block 404 is provided on the arm positioning seat. The second support block 404 is provided on the side of the arm positioning seat facing the pin guide seat. The second support block 404 is crescent-shaped and is circumferentially arranged around the first pin hole 401 to support the pin 6, thereby further improving the stability of the pin 6 after installation.

[0068] In this embodiment, the driver 2 is connected to the base arm 4 of the boom via the mounting base 1. The telescopic portion 202 of the driver 2 extends relative to the fixed portion 201, driving the pin 6 to be inserted into or removed from the first pin hole 401 and the second pin hole 501, thereby connecting or disconnecting the superlift device 5 from the boom. This embodiment features a compact structure, simple operation, and efficient and safe assembly and disassembly process. The telescopic portion 202 can be independently extended and retracted without relying on the boom's telescopic arm, thus resolving the issue of difficult assembly and disassembly of the superlift device when the boom is unable to extend or retract. Furthermore, through the positioning of the superlift device 5 and the mechanical structure on the boom, the driver 2 is independently controlled, and the pin 6 is independently inserted and removed, thus resolving the issue of inaccurate center of gravity and difficulty in insertion and removal during unilateral superlift installation.

[0069] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. An arm pin insertion and extraction device, characterized in that: include: A mounting seat (1) adapted to be fixedly connected to a basic arm (4) of a crane arm, wherein the number of the mounting seats (1) is equal to and corresponds to the number of the first pin holes (401) on the basic arm (4); A driving member (2), the number of the driving members (2) is equal to the number of the mounting seats (1) and corresponds one to one, each of the driving members (2) comprises a fixed portion (201) and a telescopic portion (202), the fixed portion (201) is connected to the mounting seat (1) corresponding thereto, the telescopic portion (202) is connected to a side of the fixed portion (201) close to the first pin shaft hole (401), the telescopic portion (202) can selectively telescope relative to the fixed portion (201), the telescopic direction of the telescopic portion (202) coincides with the center line of the first pin shaft hole (401), and the telescopic portion (202) is suitable for driving the pin shaft (6) to be inserted and removed from the first pin shaft hole (401).

2. The arm pin insertion and extraction device according to claim 1, characterized in that: The mounting seat (1) comprises: A fixed frame (101) fixedly connected to the basic arm (4); A mounting plate (102) is fixedly connected to the fixing frame (101); a mounting hole (104) is provided on the mounting plate (102); a center line of the mounting hole (104) coincides with a center line of the first pin shaft hole (401); the fixing portion (201) is mounted on a side of the mounting plate (102) away from the first pin shaft hole (401); and the telescopic portion (202) passes through the mounting hole (104) and is adapted to telescope along the center line of the mounting hole (104).

3. The arm pin insertion and extraction device according to claim 2, characterized in that: The mounting seat (1) further comprises: a reinforcing rib (103), wherein the reinforcing rib (103) is connected between the fixing frame (101) and the mounting plate (102).

4. The arm pin insertion and extraction device according to claim 2, characterized in that: A first connecting plate (203) is provided on one end of the fixing portion (201) close to the mounting plate (102); the first connecting plate (203) is annular and connected around the outer peripheral side of the fixing portion (201); the first connecting plate (203) is connected to the mounting plate (102).

5. The arm pin insertion and extraction device according to claim 4, characterized in that: A first connecting hole (204) is provided on the first connecting plate (203), and a second connecting hole corresponding to the first connecting hole (204) is provided on the mounting plate (102). The arm pin plugging and extracting device further comprises a first connecting member (301), and the first connecting member (301) is passed through the first connecting hole (204) and the second connecting hole to fixedly connect the first connecting plate (203) and the mounting plate (102).

6. The arm pin insertion and extraction device according to claim 1, characterized in that: The free end of the telescopic portion (202) is connected to a second connecting plate (205), and the second connecting plate (205) is suitable for being detachably connected to the pin shaft (6).

7. The arm pin insertion and extraction device according to claim 6, characterized in that: A third connecting hole is provided on the second connecting plate (205), and a fourth connecting hole corresponding to the third connecting hole is provided on one end of the pin shaft (6). The arm pin plugging and pulling device also includes a second connecting member (302), and the second connecting member (302) can be selectively inserted into the third connecting hole and the fourth connecting hole to fixedly connect the second connecting plate (205) and the pin shaft (6).

8. The arm pin insertion and extraction device according to any one of claims 1 to 7, characterized in that: The driving member (2) is a telescopic cylinder.

9. A crane, characterized in that: include: The lifting arm comprises a basic arm (4), the end of the basic arm (4) is provided with an arm support positioning seat, and the arm support positioning seat is provided with a first pin shaft hole (401); A super-lifting device (5), wherein a super-lifting positioning seat is provided at the end of the super-lifting device (5), a second pin shaft hole (501) is provided on the super-lifting positioning seat, the super-lifting positioning seat corresponds to the arm positioning seat, and the second pin shaft hole (501) corresponds to the first pin shaft hole (401); A pin (6) can be selectively inserted into the first pin hole (401) and the second pin hole (501) to connect the basic arm (4) and the super-lifting device (5); The arm pin plugging and pulling device according to any one of claims 1 to 8, wherein the arm pin plugging and pulling device is fixedly connected to the basic arm (4) through a mounting base (1), and the telescopic portion (202) of the driving member (2) can be selectively connected to the pin shaft (6) to drive the pin shaft (6) to be plugged and pulled out of the first pin shaft hole (401) and the second pin shaft hole (501).

10. The crane according to claim 9, characterized in that There are two super-lifting devices (5), each of which is provided with two super-lifting positioning seats, each of which is provided with a second pin shaft hole (501), and one super-lifting device (5) is provided on each of the opposite sides of the basic arm (4); Two arm support positioning seats are respectively provided on opposite sides of the basic arm (4), and each arm support positioning seat is provided with a first pin shaft hole (401). The two arm support positioning seats on each side of the basic arm (4) correspond one to one with the two super-lift positioning seats on one super-lift device (5); The number of the mounting seats (1) and the number of the driving members (2) are both four, the four mounting seats (1) correspond one-to-one to the first pin shaft holes (401) on the four arm support positioning seats, and the four driving members (2) correspond one-to-one to the first pin shaft holes (401) on the four arm support positioning seats.

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