Scarifier pin shaft inserting and pulling device and bulldozer

Abstract

The invention provides a scarifier pin shaft inserting and pulling device and a bulldozer, and belongs to the technical field of bulldozing machinery, the scarifier pin shaft inserting and pulling device comprises an inserting and pulling driving mechanism and an alignment knocking mechanism; the inserting and pulling driving mechanism is fixed to one side of the soil loosening frame, the output end of the inserting and pulling driving mechanism is connected with the first end of the pin shaft, and the inserting and pulling driving mechanism is used for applying axial acting force to the pin shaft; the alignment knocking mechanism is fixed to the side, away from the inserting and pulling driving mechanism, of the soil loosening frame and comprises an electromagnetic driving assembly and an alignment rod, the alignment rod is detachably connected with the second end of the pin shaft, and the alignment rod is slidably sleeved with a mass block; the electromagnetic driving assembly is used for driving the mass block to knock the alignment rod in the direction close to the pin shaft during pin pulling and used for driving the mass block to knock the alignment rod in the direction away from the pin shaft during pin inserting. According to the scarifier pin shaft inserting and pulling device and the bulldozer, the problem that the scarifier pin shaft is inclined and stuck in the inserting and pulling process can be solved, and the pin shaft inserting and pulling hole changing smoothness is improved.

Description

Technical Field

[0001] This invention belongs to the field of bulldozing machinery technology, specifically relating to a ripper pin insertion and extraction device and a bulldozer. Background Technology

[0002] A ripper is an auxiliary device installed at the rear of a bulldozer, mainly used for breaking, cracking, and loosening hard soil, weathered rock layers, frozen soil, etc. When the ripper is working, its hydraulic system presses the ripping teeth into the ground. Then, the bulldozer uses its powerful weight and traction to move forward, thus concentrating the enormous splitting force of the ripping teeth on a narrow area in front of it, causing the hard material to crack and loosen due to shear and tensile stress.

[0003] The ripper is installed at the rear of the bulldozer by using a connecting frame hinged to the bulldozer as the connection base. The connecting frame has a ripping bracket through which the ripper's connecting arm passes. The connection is then achieved by a pin on the ripping bracket passing through a pin hole on the connecting arm. Typically, the connecting arm has multiple pin holes spaced apart. Adjusting these pin holes allows adjustment of the height of the ripping teeth located at the lower end of the connecting arm, thus adjusting the depth to which the ripper is pressed into the ground.

[0004] In existing technologies, adjusting the loosening depth typically involves pressing the loosening teeth against the ground, pulling the pin out of its current hole using a pin puller, and then sliding the connecting arm relative to the loosening frame by swinging the connecting frame up and down. Once the target pin hole and pin are aligned, the pin is reinstalled. However, because the up-and-down swinging of the connecting frame makes it difficult to ensure the alignment of the pin and pin hole, this method of inserting and removing the pin is extremely time-consuming and labor-intensive. Consequently, the actual application effect of the automatic pin insertion and removal device currently used with loosening devices is often unsatisfactory. Especially during pin insertion, due to the large clearance between the pin and pin hole, insufficient guiding ability of the pin hole often leads to pin misalignment and jamming. In such cases, the continuous hydraulic power output of the insertion and removal device easily causes severe deformation of the pin and the loosening frame. Summary of the Invention

[0005] This invention provides a ripper pin insertion and removal device and a bulldozer, aiming to solve the problems of time-consuming and laborious ripper pin insertion and removal operations and pin misalignment and jamming, and improve the smoothness of pin insertion, removal and hole replacement.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Firstly, a ripper pin insertion / removal device is provided for pulling out a pin on a ripper frame and inserting it into a pin hole provided on the connecting arm of the ripper, comprising: The insertion and removal drive mechanism is fixed to one side of the soil loosening frame. The output end of the insertion and removal drive mechanism is connected to the first end of the pin shaft and is used to apply axial force to the pin shaft. The alignment knocking mechanism is fixed on the side of the soil loosening frame away from the plug-in and plug-out driving mechanism, and comprises an electromagnetic driving assembly and an alignment rod. The alignment rod is detachably connected with the second end of the pin shaft, and a mass block is sleeved and slid on the alignment rod. The electromagnetic driving assembly is used for driving the mass block to knock the alignment rod in the direction close to the pin shaft when the pin is pulled out, and is used for driving the mass block to knock the alignment rod in the direction away from the pin shaft when the pin is inserted.

[0007] In combination with the first aspect, in a possible implementation manner, a threaded hole is arranged at the center of the second end of the pin shaft, and one end of the alignment rod has a screw rod segment which is screwed into the threaded hole to guide the alignment of the pin shaft. First and second force transmission seats are arranged at intervals along the axial direction of the alignment rod, and the mass block is located between the first and second force transmission seats. The first force transmission seat abuts against the second end when the screw rod segment is screwed and fixed with the threaded hole. The mass block knocks the first force transmission seat when the pin is pulled out, and knocks the second force transmission seat when the pin is inserted.

[0008] In some embodiments, the alignment knocking mechanism comprises a fixed sleeve fixed on the side wall of the soil loosening frame, and the peripheral wall of the mass block is in sliding fit with the inner wall of the fixed sleeve. The electromagnetic driving assembly comprises a plurality of driving coils and a plurality of permanent magnets. Each driving coil is sleeved on the fixed sleeve at intervals along the axial direction of the fixed sleeve, and each permanent magnet is embedded in the interior of the mass block at intervals along the peripheral direction of the fixed sleeve. The driving coil is used to generate electromagnetic driving force on the permanent magnet after being electrified.

[0009] For example, each driving coil has a conduction contact embedded in the inner wall of the fixed sleeve, and the conduction contacts of each driving coil are sequentially and intervally distributed along the axial direction of the fixed sleeve. The outer periphery of the mass block is provided with an insulating sleeve, and the alignment rod is sleeved with a conductive disc which is in sliding abutment with the inner wall of the fixed sleeve. The dimension of the conductive disc along the axial direction of the fixed sleeve is greater than the interval distance of adjacent conduction contacts.

[0010] For example, the end of the fixed sleeve away from the pin shaft is provided with a guide seat, the alignment rod is slidably inserted through the guide seat, and the end of the alignment rod protruding out of the fixed sleeve through the guide seat has an operating head.

[0011] In combination with the first aspect, in a possible implementation manner, the plug-in and plug-out driving mechanism comprises: A telescopic driving member having a fixed end and a telescopic end, the fixed end being hingedly connected to the side wall of the soil loosening frame, and the telescopic end being towards the pin shaft. A push-pull arm having one end hingedly connected to the first end of the pin shaft. A swing frame having a middle part hingedly connected to the side wall of the soil loosening frame, one end of the swing frame being hingedly connected to the push-pull arm, and the other end being hingedly connected to the telescopic end.

[0012] In some embodiments, the swing frame comprises a first swing arm and a second swing arm which are connected at an included angle, the connection position of the first swing arm and the second swing arm is hinged to the side wall of the loosening frame, the first swing arm extends to the axial extension line of the pin shaft and is hinged to the push-pull arm, and the second swing arm is hinged to the telescopic end.

[0013] For example, the plug-in and pull-out driving mechanism further comprises a first fixing seat and a second fixing seat which are fixed to the side wall of the loosening frame, the fixed end is hinged to the first fixing seat, and the swing frame is hinged to the second fixing seat.

[0014] For example, the second end is a conical surface or a spherical surface which is suitable for guiding the pin shaft to enter the pin hole, and the center of the second end has a tapered hole which is suitable for guiding the extension of the alignment rod.

[0015] The loosening device provided by the present application has the following advantages: compared with the prior art, the loosening device of the present application can connect the alignment rod and the pin shaft when the pin is pulled out, and the axial constraint of the alignment rod on the pin shaft can avoid the pin shaft from being skewed and stuck during the pin pulling-out process. The mass block which is sleeved on the alignment rod is knocked towards the second end of the pin shaft by the electromagnetic driving assembly, so that the knocking force is transmitted to the pin shaft through the alignment rod, and at the same time, the first end of the pin shaft is subjected to the axial pulling force by the plug-in and pull-out driving mechanism, so that the pin shaft obtains intermittent knocking force and continuous pulling force, which is beneficial to the smooth pulling-out of the pin shaft from the current pin hole.

[0016] When the connecting arm is adjusted to the position for inserting the pin, the alignment rod is first connected to the second end of the pin shaft through the pin hole, so that the axial constraint of the alignment rod on the pin shaft can avoid the pin shaft from being skewed and stuck during the pin insertion process. Then the mass block is knocked towards the direction away from the pin shaft by the electromagnetic driving assembly, so that the knocking force is transmitted to the pin shaft through the alignment rod, and at the same time, the pin shaft is subjected to the pushing force by the plug-in and pull-out driving mechanism, so that the pin shaft can form intermittent knocking force and continuous pushing force, thereby avoiding the problems of pin shaft sticking and deformation and damage of the loosening frame during the pin insertion process, and helping to improve the smoothness of the pin insertion process.

[0017] After the pin pulling-out is completed, the alignment rod and the pin shaft can be disassembled to adjust the relative position of the connecting arm and the loosening frame, and the entire operation process only needs to disassemble and assemble the alignment rod and the pin shaft, which is simple and labor-saving, and helps to improve the operation efficiency of the loosening device for replacing the pin hole.

[0018] In a second aspect, the embodiments of the present application also provide a bulldozer comprising the loosening device of the present application.

[0019] The bulldozer provided by the present application has the beneficial effects that, compared with the prior art, the bulldozer adopts the above-mentioned soil loosening device pin shaft inserting and pulling device, and the pin shaft can obtain intermittent knocking force and continuous axial force through the cooperation of the alignment knocking mechanism and the inserting and pulling driving mechanism during the inserting and pulling process, and meanwhile, the pin shaft can be axially constrained by the alignment rod, so that the problem of skewing and jamming of the pin shaft during the inserting and pulling process is avoided, and then the smoothness and efficiency of the pin shaft hole changing operation of the soil loosening device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A perspective structural schematic view of the soil loosening device pin shaft inserting and pulling device provided by the embodiment of the present application is shown in the figure. Figure 2 A perspective structural schematic view of the inserting and pulling driving mechanism adopted by the embodiment of the present application is shown in the figure. Figure 3 A front view structural schematic view of the soil loosening device pin shaft inserting and pulling device provided by the embodiment of the present application is shown in the figure. Figure 4 A sectional view structural schematic view along the A-A line of the figure. Figure 3 Figure 5 A sectional view structural schematic view of the alignment knocking mechanism adopted by the embodiment of the present application is shown in the figure.

[0021] In the figure: 10, soil loosening frame; 11, pin shaft; 111, first end; 112, second end; 113, threaded hole; 114, spherical surface; 115, tapered hole; 20, connecting arm; 21, pin hole; 30, inserting and pulling driving mechanism; 31, telescopic driving part; 32, push-pull arm; 33, swing frame; 331, first swing arm; 332, second swing arm; 34, first fixed seat; 35, second fixed seat; 40, alignment knocking mechanism; 41, electromagnetic driving assembly; 411, driving coil; 412, permanent magnet; 413, conduction contact; 42, alignment rod; 421, screw segment; 422, first force transmission seat; 423, second force transmission seat; 424, operation head; 43, mass block; 431, insulating sliding sleeve; 44, fixed sleeve; 45, conductive disc; 46, guide seat; 50, connecting frame; 60, lifting hydraulic cylinder; 70, soil loosening blade; 80, swing hydraulic cylinder. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear and explicit, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0023] ​It should be noted that when an element is referred to as being "set on", "connected to" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "on", "under", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or several features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise specifically limited.

[0024] In the prior art, the ripper can be combined with Figure 1 and Figure 3 It is understood that the ripper is mounted on the tail frame of the bulldozer, specifically including a connecting frame 50 hinged to the tail frame, the connecting frame 50 being connected with the tail frame through a lifting hydraulic cylinder 60, the connecting frame 50 being hinged with a ripper frame 10, the ripper frame 10 having a slide way extending upward and downward, a connecting arm 20 being slidably arranged in the slide way, a ripper blade 70 being mounted at the lower end of the connecting arm 20; the ripper frame 10 being connected with the tail frame through a swing hydraulic cylinder 80, the ripper frame 10 being driven to swing forward and backward through the swing hydraulic cylinder 80; after the lifting adjustment of the connecting frame 50 is completed (determining the depth of the ripper blade 70 into the ground), the ripper blade 70 is pressed into the ground through the swing of the ripper frame 10.

[0025] When the depth of the ripper blade 70 into the ground is adjusted by changing the pin hole 21 matched with the pin shaft 11, the ripper blade 70 needs to be pressed against the ground, then the connecting frame 50 is swung up and down by the lifting hydraulic cylinder 60 after the pin shaft 11 is pulled out, so that the connecting arm 20 slides in the slide way of the ripper frame 10, and the pin shaft 11 is reinserted after the target pin hole 21 is aligned with the pin shaft 11.

[0026] Considering that the ripper blade 70 needs to have a certain amount of movement in actual working conditions, the pin shaft 11 and the pin hole 21 have a large matching gap, which causes the pin hole 21 to be unable to axially constrain the pin shaft 11. This matching is good for pulling out the pin, but for inserting the pin, the pin shaft 11 lacks guidance and is prone to be skewed, which causes the pin shaft 11 to be unable to smoothly pass through the pin hole 21 or even be stuck.

[0027] In addition, although there is a large fitting gap between the pin shaft 11 and the pin hole 21, considering that it is difficult to achieve ideal alignment by controlling the pitch angle of the lifting frame to align the pin shaft 11 and the pin hole 21, the pin hole 21 and the pin shaft 11 must have a large frictional contact in the local area during the process of inserting and pulling out the pin shaft 11. If the pin is pulled out or inserted by simply using a continuous pulling or pushing force, a larger driving force is required, which will result in a large volume and weight of the driving structure, thereby causing great trouble for its installation on the soil loosening frame 10, and the simple insertion and pulling driving force is easy to cause static friction locking phenomenon between the pin shaft 11 and the pin hole 21 after the pin shaft 11 is skewed, thereby causing the pin shaft 11 to be stuck. At this time, if the power is continuously output, the pin shaft 11 and the soil loosening frame 10 will be deformed and damaged.

[0028] Based on the actual problems existing in the prior art, the embodiment of the present application provides a soil loosener pin shaft insertion and pulling device capable of improving the smoothness of the pin shaft 11 insertion and pulling.

[0029] Please refer to Figure 1 and Figure 2 , the soil loosener pin shaft insertion and pulling device provided by the present application will be described. The soil loosener pin shaft insertion and pulling device is used for pulling out and inserting the pin shaft 11 on the soil loosening frame 10 into the pin hole 21 provided on the connecting arm 20 of the soil loosener, and comprises an insertion and pulling driving mechanism 30 and a positioning and knocking mechanism 40. The insertion and pulling driving mechanism 30 is fixed to one side of the soil loosening frame 10, the output end of the insertion and pulling driving mechanism 30 is connected with the first end 111 of the pin shaft 11, and is used for applying an axial force to the pin shaft 11.

[0030] The positioning and knocking mechanism 40 is fixed to the side of the soil loosening frame 10 away from the insertion and pulling driving mechanism 30, and comprises an electromagnetic driving assembly 41 and a positioning rod 42. The positioning rod 42 is detachably connected with the second end 112 of the pin shaft 11, and a mass block 43 is slidably sleeved on the positioning rod 42. The electromagnetic driving assembly 41 is used for driving the mass block 43 to knock the positioning rod 42 in the direction close to the pin shaft 11 when pulling out the pin, and is used for driving the mass block 43 to knock the positioning rod 42 in the direction away from the pin shaft 11 when inserting the pin.

[0031] It should be noted that the insertion and pulling driving mechanism 30 in the embodiment can be directly connected with the first end 111 of the pin shaft 11 by using a hydraulic oil cylinder, and an axial pulling or pushing force is generated on the pin shaft 11 by the extension and retraction of the hydraulic oil cylinder. The insertion and pulling driving mechanism 30 can also be connected with the pin shaft 11 by cooperating with a connecting rod mechanism on the basis of the hydraulic oil cylinder. In this way, the hydraulic oil cylinder can obtain more installation angles on the side wall of the soil loosening frame 10, which is conducive to improving the layout flexibility and installation compactness.

[0032] The alignment knocking mechanism 40 in this embodiment is used to connect the pin shaft 11 through the alignment rod 42 to form axial movement constraint on the pin shaft 11, thereby avoiding the pin shaft 11 to tilt and swing in the assembly gap during the plugging process, and on the other hand, the mass block 43 is driven by the electromagnetic driving assembly 41 to continuously knock the alignment rod 42, thereby forming the action of indirectly knocking the pin shaft 11, especially when the pin shaft 11 deviates from the center of the pin hole 21 to cause strong contact friction between the pin shaft 11 and the pin hole 21 during the plugging process, the pin shaft 11 can be slightly vibrated through the knocking action, thereby avoiding the pin shaft 11 to be stuck; in addition, the knocking of the pin shaft 11 by the alignment knocking mechanism 40 can reduce the power dependence on the plugging driving mechanism 30, thereby the output load of the plugging driving mechanism 30 can be reduced, and then a smaller plugging driving mechanism 30 can be selected to improve the overall structural compactness and reduce the space occupation and facilitate the installation layout.

[0033] It should be understood that during the plugging of the pin shaft 11, the plugging driving mechanism 30 plays a major role, and the alignment knocking mechanism 40 plays an auxiliary role. The electromagnetic driving assembly 41 can control the direction of the electromagnetic driving force by controlling the direction of the current, thereby driving the mass block 43 to knock the alignment rod 42 towards the pin shaft 11 when pulling out the pin, and driving the mass block 43 to knock the alignment rod 42 away from the pin shaft 11 when plugging the pin.

[0034] The plugging device of the pin shaft of the soil loosener provided in this embodiment compared with the prior art can connect the alignment rod 42 with the pin shaft 11 when pulling out the pin, and avoid the pin shaft 11 to tilt and be stuck during the plugging process by using the axial constraint of the alignment rod 42 on the pin shaft 11. The mass block 43 slidingly sleeved on the alignment rod 42 is driven by the electromagnetic driving assembly 41 to knock the alignment rod 42 towards the second end 112 of the pin shaft 11, thereby the knocking force is transmitted to the pin shaft 11 through the alignment rod 42, and at the same time, the first end 111 of the pin shaft 11 is subjected to the axial pulling force by the plugging driving mechanism 30, thereby the pin shaft 11 obtains intermittent knocking force and continuous pulling force, which is beneficial to smoothly pull out the pin shaft 11 from the current pin hole 21.

[0035] When the connecting arm 20 is adjusted to the position for inserting the pin, first, the alignment rod 42 is connected with the second end 112 of the pin shaft 11 through the pin hole 21, so that the axial constraint of the pin shaft 11 by the alignment rod 42 avoids the pin shaft 11 from being skewed and stuck during the pin insertion process. Then, the mass block 43 is knocked against the alignment rod 42 by the electromagnetic driving assembly 41 in a direction away from the pin shaft 11, so that the knocking force is transmitted to the pin shaft 11 through the alignment rod 42, and at the same time, the pin shaft 11 is subjected to the thrust force by the plug driving mechanism 30, so that the intermittent knocking force and the continuous thrust force are formed on the pin shaft 11, thereby avoiding the deformation and damage of the pin shaft 11 and the soil breaking frame 10 caused by the pin shaft 11 being stuck during the pin insertion process, and helping to improve the smoothness of the pin insertion process.

[0036] In some embodiments, referring to Figure 5 , the second end 112 of the pin shaft 11 is provided with a threaded hole 113, and one end of the alignment rod 42 is provided with a screw segment 421 for being screwed into the threaded hole 113 to guide the alignment of the pin shaft 11; the alignment rod 42 is provided with a first force transmission seat 422 and a second force transmission seat 423 spaced apart along the axial direction of the alignment rod 42, and the mass block 43 is located between the first force transmission seat 422 and the second force transmission seat 423; the first force transmission seat 422 abuts against the second end 112 when the screw segment 421 is screwed into the threaded hole 113; wherein the mass block 43 knocks the first force transmission seat 422 during the pin pulling and knocks the second force transmission seat 423 during the pin insertion.

[0037] The alignment rod 42 is connected with the pin shaft 11 through the screw segment 421 and the threaded hole 113, which is convenient for disassembly and assembly, and can transmit the knocking force through the thread cooperation between the screw segment and the threaded hole 113; on this basis, when the mass block 43 is knocked against the first force transmission seat 422 by the electromagnetic driving assembly 41, the pin shaft 11 is knocked through the alignment rod 42, and since the mass block 43 and the first force transmission seat 422 are rigidly collided, the mass block 43 rebounds after knocking the first force transmission seat 422, and then the mass block 43 is knocked against the first force transmission seat 422 again by the electromagnetic driving assembly 41, so that the mass block 43 repeatedly knocks the first force transmission seat 422 by the electromagnetic driving assembly 41, thereby realizing the knocking effect on the pin shaft 11 during the pin pulling process.

[0038] Similarly, when the pin is inserted, the electromagnetic driving force of the electromagnetic driving assembly 41 is reversed to repeatedly knock the second force transmission seat 423 by the mass block 43, so that the knocking force is transmitted to the pin shaft 11 through the alignment rod 42, thereby realizing the knocking effect on the pin shaft 11 during the pin insertion process.

[0039] It needs to be explained that in order to ensure that the mass 43 can rebound and reset after knocking the first force transmission seat 422 and the second force transmission seat 423, the electromagnetic drive assembly 41 can be periodically powered to generate electromagnetic driving force, that is, the power is turned off immediately after the power is turned on to drive the mass 43 to knock the first force transmission seat 422 or the second force transmission seat 423, thereby avoiding the mass 43 from being unable to reset due to the restriction of the electromagnetic driving force after rebounding, thereby affecting the knocking effect of the next time. Specifically, the current input by the electromagnetic drive assembly 41 is a square wave current, and the plug-in process and the plug-out process reverse the current.

[0040] As a specific embodiment of the above-mentioned alignment knocking mechanism 40, please refer to Figure 4 and Figure 5 The alignment knocking mechanism 40 includes a fixed sleeve 44 fixed to the side wall of the soil loosening frame 10, and the peripheral wall of the mass 43 is in sliding fit with the inner wall of the fixed sleeve 44; the electromagnetic drive assembly 41 includes a plurality of drive coils 411 and a plurality of permanent magnets 412; each drive coil 411 is sleeved on the fixed sleeve 44 in the axial direction of the fixed sleeve 44, and each permanent magnet 412 is embedded in the interior of the mass 43 in the peripheral direction of the fixed sleeve 44; the drive coil 411 is used to generate electromagnetic driving force on the permanent magnet 412 after being powered.

[0041] The fixed sleeve 44 provides guidance for the linear motion of the mass 43 as a mounting base, and the alignment rod 42 is inserted through the center of the mass 43 to obtain position constraint, thereby being able to form axial constraint on the pin shaft 11 after the alignment rod 42 is connected with the pin shaft 11, avoiding the pin shaft 11 from being severely skewed and causing jamming during the plug-in and plug-out processes.

[0042] Each drive coil 411 adopts a parallel mode, and each drive coil 411 can generate a magnetic field after being powered. The magnetic pole direction of the permanent magnet 412 is consistent with the axial direction of the fixed sleeve 44. When the drive coil 411 inputs a forward square wave current, an electromagnetic driving force repelling the permanent magnet 412 is generated, thereby driving the mass 43 to knock the first force transmission seat 422, and then transmitting the knocking force to the pin shaft 11 through the force transmission rod to assist in plug-out; when the drive coil 411 inputs a reverse square wave current, an electromagnetic driving force attracting the permanent magnet 412 is generated, thereby driving the mass 43 to knock the second force transmission seat 423, and then transmitting the knocking force to the pin shaft 11 through the force transmission rod to assist in plug-in.

[0043] In some possible implementation manners, please refer to Figure 5Each driving coil 411 has a conduction contact 413 embedded in the inner wall of the fixed sleeve 44, and the conduction contacts 413 of each driving coil 411 are sequentially and spacedly distributed along the axial direction of the fixed sleeve 44; the outer periphery of the mass block 43 is provided with an insulating sleeve 431, and the alignment rod 42 is sleeved with a conductive disc 45, the conductive disc 45 is in sliding contact with the inner wall of the fixed sleeve 44, and the axial dimension of the conductive disc 45 along the fixed sleeve 44 is greater than the interval distance between adjacent conduction contacts 413.

[0044] It is considered that the alignment rod 42 is connected with the pin shaft 11 and will produce axial displacement synchronously with the pin shaft 11, so that the corresponding driving coil 411 of the mass block 43 will change with the axial displacement of the alignment rod 42. In this way, the conduction contacts 413 of the driving coil 411 corresponding to the current position of the mass block 43 can be conducted by setting the conductive disc 45 such as a copper disc on the alignment rod 42, so that the circuit of the driving coil 411 is conducted to generate electromagnetic driving force, and the remaining driving coils 411 do not generate magnetic field due to the non-conduction of the conduction contacts 413. Thus, the influence of the electromagnetic driving force caused by the reverse cancellation of the magnetic field of the current driving coil 411 and the magnetic field of the remaining driving coils 411 can be avoided. On this basis, since the axial dimension of the conductive disc 45 is greater than the interval distance between adjacent conduction contacts 413, the conductive disc 45 can sequentially conduct each driving coil 411 along the moving direction of the alignment rod 42 during the axial displacement of the alignment rod 42 during the plugging and unplugging of the pin shaft 11, thereby ensuring the continuity and stability of the electromagnetic driving force.

[0045] In the embodiment, the mass block 43 can be a metal block such as an iron block. In order to avoid the problem of circuit caused by the accidental contact of the mass block 43 with the conduction contacts 413, the insulating sleeve 431 is sleeved on the outer periphery of the mass block 43. On the one hand, it can avoid triggering the conduction contacts 413 during the movement of the mass block 43, and on the other hand, it can improve the wear resistance and reduce the friction resistance of the mass block 43 in the fixed sleeve 44, thereby improving the service life of the mass block 43.

[0046] Specifically, the above-mentioned insulating sleeve 431 can be a sleeve made of polytetrafluoroethylene material, which has insulation, low friction coefficient, and high wear resistance.

[0047] It should be noted that, as shown in Figure 5 The end of the fixed sleeve 44 away from the pin shaft 11 is provided with a guide seat 46, the alignment rod 42 is slidably arranged in the guide seat 46, and the end of the alignment rod 42 protruding out of the fixed sleeve 44 has an operating head 424.

[0048] On the basis of the axial constraint of the alignment rod 42 by the mass block 43 through the sliding fit, the axial constraint of the alignment rod 42 is increased by the guide seat 46, so as to improve the axial position stability of the alignment rod 42, and then the axial stability of the pin shaft 11 can be ensured after the alignment rod 42 is connected with the pin shaft 11, the problem of the pin shaft 11 being skewed due to lack of guidance in the plugging process is solved, and the plugging smoothness of the pin shaft 11 is improved.

[0049] As a specific embodiment of the plugging driving mechanism 30, please refer to Figures 1 to 3 , the plugging driving mechanism 30 includes a telescopic driving member 31, a push-pull arm 32 and a swing frame 33; the telescopic driving member 31 has a fixed end and a telescopic end, the fixed end is hinged to the side wall of the loosening frame 10, and the telescopic end faces the pin shaft 11; one end of the push-pull arm 32 is hinged to the first end 111 of the pin shaft 11; the middle part of the swing frame 33 is hinged to the side wall of the loosening frame 10, one end of the swing frame 33 is hinged to the push-pull arm 32, and the other end is hinged to the telescopic end.

[0050] The telescopic driving member 31 can be a hydraulic cylinder, the swing frame 33 is swung by the telescopic end of the telescopic driving member 31, and then the push-pull arm 32 generates pulling force or pushing force on the pin shaft 11. Here, the telescopic movement of the telescopic driving member 31 can be converted into the axial movement of the pin shaft 11 under the condition that the telescopic driving member 31 and the pin shaft 11 are not coaxial, so as to improve the installation layout reliability and flexibility of the telescopic driving member 31 on the side wall of the loosening frame 10.

[0051] Specifically, the optional structure of the swing frame 33 in the embodiment is shown in Figure 2 , the swing frame 33 includes first swing arm 331 and second swing arm 332 which are connected at an angle, the connection position of the first swing arm 331 and the second swing arm 332 is hinged to the side wall of the loosening frame 10, the first swing arm 331 extends to the axial extension line of the pin shaft 11 and is hinged to the push-pull arm 32, and the second swing arm 332 is hinged to the telescopic end.

[0052] The first swing arm 331 and the second swing arm 332 connected at an angle can on the one hand enable the telescopic driving member 31 to be installed in a form close to parallel to the side wall of the loosening frame 10, so as to improve the compactness and stability of the installation structure, and on the other hand can obtain a lever effect by selecting the length ratio of the first swing arm 331 and the second swing arm 332, so as to reduce the dependence on the power of the telescopic driving member 31, which helps to reduce the volume and occupied space of the telescopic driving member 31 and improve the overall structural compactness.

[0053] The first swing arm 331 extends to the axial extension line of the pin shaft 11, which can enable the push-pull arm 32 to exert a pulling force or a pushing force on the pin shaft 11 at an angle close to axial alignment with the pin shaft 11, thereby reducing the radial component force borne by the pin shaft 11, and facilitating reduction of the probability and angle of skewing of the pin shaft 11 during insertion and extraction, thereby avoiding the problem of pin shaft 11 jamming due to skewing, and improving the smoothness of insertion and extraction of the pin shaft 11.

[0054] It should be understood that, referring to Figure 2 and Figure 3 In the embodiment, the insertion and extraction driving mechanism 30 further includes a first fixed seat 34 and a second fixed seat 35 fixed to the side wall of the soil loosening frame 10, the fixed end is hinged to the first fixed seat 34, and the swing frame 33 is hinged to the second fixed seat 35.

[0055] The first fixed seat 34 and the second fixed seat 35 are both seat body structures with hinge ears, and by providing the first fixed seat 34 and the second fixed seat 35, the telescopic driving member 31 and the swing frame 33 can be separated from the side wall of the soil loosening frame 10, thereby ensuring sufficient movement space and avoiding movement interference to affect the smoothness of insertion and extraction of the pin shaft 11.

[0056] It should be noted that, referring to 5, in the embodiment, the second end 112 of the pin shaft 11 is a conical surface or a spherical surface 114 suitable for guiding the pin shaft 11 to enter the pin hole 21, and the center of the second end 112 has a tapered hole 115 suitable for guiding the extension of the alignment rod 42.

[0057] The conical surface or spherical surface 114 of the second end 112 can improve the smoothness of insertion into the pin hole 21 during pin insertion, and the tapered hole 115 in the center of the second end 112 is used to guide the extension of the alignment rod 42, thereby improving the connection smoothness of the alignment rod 42 and the second end 112, avoiding the situation that the screw rod segment 421 of the alignment rod 42 cannot be smoothly screwed into the threaded hole 113 (the threaded hole 113 is provided at the bottom of the tapered hole 115, and the tapered hole 115 is used to guide the screw rod segment 421 into the threaded hole 113) before the alignment rod 42 is connected to the pin shaft 11, thereby reducing the difficulty of disassembly operation of the alignment rod 42.

[0058] Based on the same inventive concept, in combination Figures 1 to 5 It should be understood that the embodiments of the present application also provide a bulldozer comprising the above-mentioned soil loosener pin shaft insertion and extraction device.

[0059] Compared with the prior art, the bulldozer provided in this embodiment adopts the above-mentioned ripper pin insertion and removal device. During the insertion and removal of the pin, the pin 11 can obtain intermittent striking force and continuous axial force through the cooperation of the alignment striking mechanism 40 and the insertion and removal driving mechanism 30. At the same time, the alignment rod 42 can be used to form an axial constraint on the pin 11, thereby avoiding the problem of skewed jamming during the insertion and removal of the pin 11, and thus improving the smoothness and efficiency of the ripper pin 11 hole changing operation.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for inserting and removing a pin shaft on a ripper frame into and from a pin hole provided on a connecting arm of a ripper, characterized in that, The utility model relates to a kind of soil loosening frame and its plug-in and pull-out mechanism, including: Plug-in and pull-out driving mechanism is fixed to the side of the soil loosening frame, the output end of the plug-in and pull-out driving mechanism is connected with the first end of the pin shaft, for the pin shaft is applied axial force; Alignment knock mechanism is fixed to the side of the soil loosening frame away from the plug-in and pull-out driving mechanism, the alignment knock mechanism includes electromagnetic drive assembly and alignment rod, the second end of the pin shaft is detachably connected with the alignment rod, and mass is slidably sleeved on the alignment rod;The electromagnetic drive assembly is used to drive the mass to knock the alignment rod in the direction close to the pin shaft when pulling out pin, and is used to drive the mass to knock the alignment rod in the direction away from the pin shaft when inserting pin.

2. The ripper pin puller of claim 1 wherein, The second end of the pin shaft is provided with a threaded hole in the center, one end of the alignment rod has a screw rod segment, and the screw rod segment is used to be screwed into the threaded hole to guide the pin shaft to be aligned;First force transmission seat and second force transmission seat are arranged at intervals along the axial direction of the alignment rod, and the mass is located between the first force transmission seat and the second force transmission seat;The first force transmission seat is in abutment with the second end when the screw rod segment is screwed and fixed with the threaded hole;Wherein, the mass knocks the first force transmission seat when pulling out pin, and knocks the second force transmission seat when inserting pin.

3. The ripper pin puller of claim 1 wherein, The alignment knock mechanism includes a fixed sleeve fixed to the side wall of the soil loosening frame, and the peripheral wall of the mass is in sliding fit with the inner wall of the fixed sleeve;The electromagnetic drive assembly includes a plurality of drive coils and a plurality of permanent magnets;Each drive coil is sleeved in the fixed sleeve at intervals along the axial direction of the fixed sleeve, and each permanent magnet is embedded in the interior of the mass at intervals along the circumferential direction of the fixed sleeve;The drive coil is used to generate electromagnetic driving force on the permanent magnet after being energized.

4. The ripper pin puller of claim 3 wherein, Each drive coil has a conduction contact embedded in the inner wall of the fixed sleeve, and the conduction contacts of each drive coil are sequentially and intermittently distributed along the axial direction of the fixed sleeve;The outer periphery of the mass is provided with an insulating sleeve, and a conductive disc is sleeved on the alignment rod, the conductive disc is in sliding abutment with the inner wall of the fixed sleeve, and the conductive disc is larger in size along the axial direction of the fixed sleeve than the interval distance of adjacent conduction contacts.

5. The ripper pin puller of claim 4 wherein, The end of the fixed sleeve away from the pin shaft is provided with a guide seat, the alignment rod is slidably penetrated in the guide seat, and the end of the alignment rod penetrating through the guide seat and extending out of the fixed sleeve has an operating head.

6. The ripper pin puller of claim 1 wherein, The plug-in and pull-out driving mechanism includes: Telescopic driving part, with fixed end and telescopic end, the fixed end is hinged to the side wall of the soil loosening frame, and the telescopic end is towards the pin shaft; Push-pull arm, one end is hinged to the first end of the pin shaft; Swing frame, the middle part is hinged to the side wall of the soil loosening frame, one end of the swing frame is hinged with the push-pull arm, and the other end is hinged with the telescopic end.

7. The ripper pin puller of claim 6 wherein, The swing frame includes first swing arm and second swing arm that meet at an angle, the meeting position of the first swing arm and the second swing arm is hinged to the side wall of the soil loosening frame, the first swing arm extends to the axial extension line of the pin shaft and is hinged with the push-pull arm, and the second swing arm is hinged with the telescopic end.

8. The ripper pin puller of claim 7 wherein, The plug drive mechanism further comprises a first fixed seat and a second fixed seat fixed to the side wall of the loosening frame, the fixed end is hinged to the first fixed seat, and the swing frame is hinged to the second fixed seat.

9. A ripper pin puller as claimed in any one of claims 1 to 8, wherein, The second end is a conical surface or a spherical surface suitable for guiding the pin shaft to be introduced into the pin hole, and the center of the second end has a tapered hole suitable for guiding the alignment rod to be inserted.

10. A bulldozer characterized by The loosening device comprises a loosening frame, a swing frame, a fixed end, a plug drive mechanism, a pin shaft, a pin hole, a second end, an alignment rod, and a pin hole.

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