Connection Structure between Driving Device and Frame and Working Machine

Abstract

The present invention relates to the technical field of working machinery, and provides a connection structure between a driving device and a vehicle frame and a working machinery, including a pair of ear plates fixedly connected to the vehicle frame, and the pair of ear plates are provided with corresponding shaft holes; an eccentric shaft, including a main shaft portion and shaft neck portions respectively arranged at both ends of the main shaft portion, and the axis line of the shaft neck portion deviates from the axis line of the main shaft portion; the shaft neck portions at both ends of the eccentric shaft are respectively rotatably matched with the shaft holes on the pair of ear plates; the driving device is rotatably sleeved on the main shaft portion; a locking mechanism for locking the shaft neck portion to limit the rotation of the eccentric shaft. By rotating the eccentric shaft and cooperating with the locking mechanism, the position of the rotation center of the driving device on the vehicle frame can be adjusted, so as to compensate for the errors caused by welding, machining and overall machine assembly, etc. Compared with the prior art, the requirement for the process level can be reduced, and at the same time, problems such as the increase in cost and the reduction of the structural safety factor caused by re-welding of out-of-tolerance products can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and in particular to a connection structure between a driving device and a vehicle frame and a construction machinery. Background Art

[0002] At present, when manufacturing construction machinery, generally, each component is produced first and then assembled. Taking a bulldozer as an example, when manufacturing a bulldozer, components such as the vehicle frame and the earthmoving blade are all of welded structures as a whole. The earthmoving blade is connected to the vehicle frame of the vehicle body through a mounting bracket. One end of the mounting bracket is connected to the earthmoving blade, and the other end is hinged to the vehicle frame through a cylindrical pin shaft; the cylinder body of the oil cylinder is hinged to the vehicle frame through a pin shaft, and the piston rod is hinged to the mounting bracket through a pin shaft. The earthmoving and digging and grounding actions of the earthmoving blade are realized by the telescoping of the oil cylinder.

[0003] However, the above connection method has certain limitations. Since components such as the vehicle frame and the earthmoving blade are all of welded structures as a whole, for example, each hinge seat or mounting seat for installing the pin shaft is fixed to the earthmoving blade and the vehicle frame by welding. Affected by welding errors and welding shrinkage, it is difficult to control the relative spatial dimensions of each component, and it is very easy to have unadjustable out-of-tolerance, resulting in too low lifting height of the earthmoving blade, the climbing angle of the excavator not meeting the design requirements, or too high lifting height of the earthmoving blade. Coupled with the assembly errors of the platform and the counterweight, the earthmoving blade interferes with the counterweight of the excavator.

[0004] For existing products with out-of-tolerance, only rework and re-welding can be carried out. However, using this method to solve the out-of-tolerance problem will not only greatly increase the production cost, but also easily generate thermal cracks during multiple re-weldings, reducing the structural safety factor. Summary of the Invention

[0005] The present invention provides a connection structure between a driving device and a vehicle frame and a construction machinery to compensate for errors caused by welding, machining, and overall machine assembly, and reduce the problem of increased production cost caused by product out-of-tolerance.

[0006] The present invention provides a connection structure between a driving device and a vehicle frame, including:

[0007] A pair of ear plates fixedly connected to the vehicle frame, and a pair of corresponding shaft holes are provided on the pair of ear plates;

[0008] An eccentric shaft, including a main shaft portion and shaft necks respectively provided at both ends of the main shaft portion, and the axis of the shaft neck is offset from the axis of the main shaft portion; the shaft necks at both ends of the eccentric shaft are respectively rotatably matched with the shaft holes on the pair of ear plates; the driving device is rotatably sleeved on the main shaft portion;

[0009] A locking mechanism for locking the shaft neck to limit the rotation of the eccentric shaft.

[0010] A connection structure between a driving device and a vehicle frame provided by the present invention, the locking mechanism includes:

[0011] A locking disc, fixedly connected to the end of one of the shaft necks, and the locking disc is in the shape of a gear;

[0012] A locking block, detachably and fixedly connected to the ear plate, teeth are provided on the locking block and meshed with the locking disc;

[0013] A limiting component, arranged at the end of the other shaft neck, for limiting the axial and radial displacement of the eccentric shaft.

[0014] A connection structure between a driving device and a vehicle frame provided by the present invention, the limiting component includes:

[0015] A threaded column, fixedly connected to the end of the shaft neck, and part or all of the threaded column protrudes from the shaft hole;

[0016] A locking nut, threadedly connected to the threaded column, and the locking nut abuts against the outer side wall of the ear plate.

[0017] A connection structure between a driving device and a vehicle frame provided by the present invention, a first mark is provided on the locking disc, and a second mark is provided on the locking block for marking the relative positions of the locking disc and the locking block.

[0018] A connection structure between a driving device and a vehicle frame provided by the present invention, the locking block is in the shape of a toothed ring and sleeved outside the locking disc.

[0019] A connection structure between a driving device and a vehicle frame provided by the present invention, the locking block is fixedly connected to the ear plate by bolts.

[0020] A connection structure between a driving device and a vehicle frame provided by the present invention, one of the shaft necks is a first shaft neck, and the shaft hole matching the first shaft neck is a first shaft hole; the other shaft neck is a second shaft neck, and the shaft hole matching the second shaft neck is a second shaft hole;

[0021] The threaded column is arranged on the first shaft neck, and the diameter of the threaded column is not greater than the diameter of the first shaft hole;

[0022] The diameter of the second shaft hole is not less than the diameter of the main shaft part, for the main shaft part to pass through and enter between the two ear plates.

[0023] A connection structure between a driving device and a vehicle frame provided by the present invention, a washer is provided between the locking nut and the outer side wall of the ear plate.

[0024] The present invention further provides a working machine, including a vehicle frame and a driving device, and the vehicle frame and the driving device are connected through the connection structure between the driving device and the vehicle frame as described above.

[0025] A working machine according to the present invention further includes a vehicle body, a bulldozer blade and a connecting frame;

[0026] The vehicle frame is fixedly connected to the vehicle body;

[0027] One end of the connecting frame is connected to the bulldozer blade, and the other end is hinged to the vehicle frame;

[0028] One end of the driving device away from the eccentric shaft is hinged to the connecting frame.

[0029] Beneficial effects:

[0030] 1. For a connection structure between a driving device and a vehicle frame and a working machine provided by the present invention, through the mutually cooperating eccentric shaft and locking mechanism, the position of the rotation center of the driving device on the vehicle frame can be adjusted, thereby compensating for errors caused by welding, machining, and overall machine assembly, etc. Compared with the prior art, the requirement for the process level can be reduced, and at the same time, problems such as increased costs and reduced structural safety factors caused by rework and re-welding of out-of-tolerance products can be reduced.

[0031] 2. When adjusting the eccentric shaft, the locking block can be disassembled from the ear plate first. After the eccentric shaft is adjusted to a predetermined angle or position, the locking block is fixed to the ear plate, and the locking block is engaged with the locking disc to perform a high-precision adjustment of the eccentric shaft.

[0032] 3. When installing the eccentric shaft, the eccentric shaft can be inserted between the two ear plates from the position of the second shaft hole until the threaded column passes through the other shaft hole, so that the eccentric shaft is rotatably supported between the two ear plates, facilitating and quickly assembling the eccentric shaft onto the ear plates. Description of the drawings

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 is a schematic structural diagram of the bulldozer blade structure provided by the present invention;

[0035] Figure 2 is a schematic diagram of the connection structure between the driving device and the vehicle frame provided by the present invention;

[0036] Figure 3It is a schematic structural diagram of the cooperation between the locking disc and the locking block provided by the present invention;

[0037] Figure 4 It is a schematic principle diagram of the adjustment assembly provided by the present invention for adjusting the lifting height of the bulldozer blade.

[0038] Reference numerals:

[0039] 1. Bulldozer blade; 2. Frame; 20. Hinge seat; 3. Connecting frame; 30. Connecting arm; 4. Driving device; 5. Ear plate; 50. First shaft hole; 51. Second shaft hole; 6. Eccentric shaft; 60. Main shaft part; 61. First shaft neck; 62. Second shaft neck; 620. Screwing groove; 7. Locking mechanism; 70. Threaded column; 71. Locking nut; 72. Locking disc; 73. Locking block; 74. Washer; 8. Bolt; 9. Connecting seat; 90. Connecting rod. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts fall within the scope of protection of the present invention.

[0041] To facilitate understanding of the connection structure between the driving device and the frame and the working machine provided by the present invention, its application scenario will be described first. When existing working machines such as excavators and bulldozers are produced, generally, each component is produced first and then assembled. Taking a bulldozer as an example, the frame, bulldozer blade and other components are all welded structures as a whole. For example, hinge seats will be welded on the frame or the bulldozer blade to install the connecting arm or the hydraulic cylinder. Affected by factors such as welding errors and welding shrinkage, it is difficult to control the spatial dimensions of each component, and it is very easy to have unadjustable out-of-tolerance, resulting in the lifting height of the bulldozer blade being too high or too low.

[0042] Currently, special tooling welding is generally used to reduce the out-of-tolerance problem. For products with out-of-tolerance, they will be reworked and welded again. No matter which of the above methods is used to reduce the out-of-tolerance problem, it will greatly increase the production cost. In addition, multiple re-weldings are prone to generate thermal cracks and reduce the structural safety factor. Therefore, the present application provides a connection structure between the driving device and the frame and a working machine to compensate for errors caused by welding, machining and overall assembly, etc., and reduce the problem of increased production cost caused by product out-of-tolerance.

[0043] The following will be combined with Figures 1 - 4 Describe the connection structure between the driving device and the frame and the working machine of the present invention.

[0044] It should be noted that the construction machinery described in the present invention includes, but is not limited to, excavators, bulldozers, etc. In order to better understand the connection structure between the driving device and the vehicle frame provided by the present invention and the construction machinery, in this embodiment, a bulldozer is taken as an example for illustration. It should be understood that the following description is only an illustrative embodiment of the present invention and does not constitute any limitation to the present invention.

[0045] Referring to Figure 1 , a bulldozer blade structure is disclosed, which includes a bulldozer blade 1, a vehicle frame 2, a connecting frame 3 and a driving device 4; wherein, the vehicle frame 2 is used to connect to the vehicle body to integrally connect the bulldozer blade structure to the vehicle body; one end of the connecting frame 3 is connected to the bulldozer, and the other end is hinged to the vehicle frame 2, thereby connecting the bulldozer blade 1 to the vehicle frame 2; one end of the driving device 4 is connected to the vehicle frame 2 through the connection structure between the driving device and the vehicle frame, and the other end is hinged to the connecting frame 3. By driving the connecting frame 3 to rotate up and down around the hinge axis by the driving device 4, the bulldozer blade 1 can complete the lifting and grounding actions. Specifically, the driving device 4 can be a linear driving element such as a hydraulic cylinder or a pneumatic cylinder. In this embodiment, the driving device 4 adopts a hydraulic cylinder.

[0046] Referring to Figure 2 and Figure 3 , the connection structure between the driving device and the vehicle frame includes an ear plate 5, an eccentric shaft 6 and a locking mechanism 7; wherein, a pair of ear plates 5 are arranged at intervals and are fixedly connected to the vehicle frame 2 by welding, and are used to provide installation positions for the eccentric shaft 6 and the locking mechanism 7.

[0047] The eccentric shaft 6 includes a main shaft portion 60 and shaft neck portions respectively arranged at both ends of the main shaft portion 60. The central axes of the two shaft neck portions coincide, and the central axis of the shaft neck portion is deviated from the central axis of the main shaft portion 60. A shaft hole is respectively arranged on each of the two ear plates 5, and the positions of the shaft holes on the two ear plates 5 correspond to each other. The shaft neck portions at both ends of the eccentric shaft 6 are respectively embedded in the shaft holes on the two ear plates 5, and the shaft neck portion and the shaft hole are rotatably matched, so that the eccentric shaft 6 is rotatably supported between the two ear plates 5.

[0048] One end of the hydraulic cylinder is rotatably sleeved on the main shaft portion 60. For example, an ear seat with a hole can be arranged at the end of the hydraulic cylinder, and the hydraulic cylinder is rotationally connected to the main shaft portion 60 by sleeving the ear seat on the main shaft portion 60. The central axis of the main shaft portion 60 is the rotation center of the hydraulic cylinder. When the eccentric shaft 6 rotates, the position of the central axis of the main shaft portion 60 changes, thereby changing the position of the rotation center of the hydraulic cylinder.

[0049] The locking mechanism 7 is mainly used to lock the shaft neck portion to limit the rotation of the eccentric shaft 6, so that the main shaft portion 60 is fixed at a predetermined position, thereby adjusting the rotation center of the hydraulic cylinder and achieving the purpose of adjusting the lifting height of the bulldozer blade 1.

[0050] Its adjustment principle is as follows: Refer to Figure 4 , set the position of the rotation center of the connecting frame 3 as A, and its distance from the bulldozer blade 1 is L1. Correspondingly, the rotation path of the bulldozer blade 1 is R1; set the center position of the shaft neck as B, and the distance between the central axis of the shaft neck and the central axis of the main shaft part 60 is L2. When the eccentric shaft 6 rotates, the rotation path of the center point of the main shaft part 60 is R2; when the hydraulic cylinder retracts to the shortest, the bulldozer blade 1 is lifted to the highest. According to the well-known plane geometry principle, when the rotation center A of the connecting frame 3, the rotation center B of the eccentric shaft 6, and the rotation center of the hydraulic cylinder are collinear, the bulldozer blade 1 can move to two extreme positions. Since the center of the main shaft part 60 is the rotation center of the hydraulic cylinder, when the three points are collinear, the center of the main shaft part 60 is K and M. When the center of the main shaft part 60 is at point K, the rotation path of the hydraulic cylinder block is R3, and the intersection of R3 and R1 is the highest point C that the bulldozer blade 1 can reach, and the distance between C and the ground is L3; correspondingly, when the center of the main shaft part 60 is at point M, the rotation path of the hydraulic cylinder block is R4, and the intersection of R4 and R1 is the highest point D that the bulldozer blade 1 can reach at this time, and the distance between D and the ground is L4. Therefore, by adjusting the position of the rotation center of the hydraulic cylinder through the eccentric shaft 6, the lifting height of the bulldozer blade 1 can be adjusted, and the adjustment range is from L3 to L4.

[0051] In actual production, by rotating the eccentric shaft 6 to adjust the rotation center of the hydraulic cylinder on the vehicle frame 2 to adjust the lifting height of the bulldozer blade 1 and compensate for the errors caused by welding, machining, and overall assembly of the whole machine. Compared with the prior art, the requirement for the process level can be reduced, and at the same time, problems such as increased cost and reduced structural safety factor caused by rework welding of out-of-tolerance products can be reduced.

[0052] Specifically, refer to Figure 2 and Figure 3 , the shaft neck of the eccentric shaft 6 and the main shaft part 60 can be fixed by welding or integrally formed. In this embodiment, the shaft neck is integrally formed on the main shaft part 60. It can be understood that in order to improve the smoothness of the rotation of the eccentric shaft 6, a shaft sleeve can also be fixed in the shaft hole.

[0053] For the convenience of understanding, set one shaft neck of the eccentric shaft 6 as the first shaft neck 61 and the other shaft neck as the second shaft neck 62. Correspondingly, the shaft hole cooperating with the first shaft neck 61 is the first shaft hole 50, and the shaft hole cooperating with the second shaft neck 62 is the second shaft hole 51. The diameter of the second shaft hole 51 is not less than the diameter of the main shaft part 60, which can enable the whole main shaft part 60 to pass through the second shaft hole 51 into the two ear plates 5, thus facilitating the installation of the eccentric shaft 6.

[0054] The locking mechanism 7 includes a locking disc 72, a locking block 73 and a limiting component; wherein, the locking disc 72 is arranged at one end of the second shaft neck 62 away from the main shaft part 60, and its diameter is larger than the diameter of the second shaft hole 51. The limiting component is arranged on the first shaft neck 61. Under the combined limiting action of the locking disc 72 and the limiting component, the eccentric shaft 6 can be restricted from axial displacement, so as to restrict the eccentric shaft 6 on the ear plate 5.

[0055] The locking disc 72 has a gear-shaped structure. The locking block 73 is detachably and fixedly connected to the ear plate 5. Teeth are arranged on the locking block 73. By meshing the locking block 73 with the locking disc 72, the rotation of the eccentric shaft 6 can be restricted. Specifically, the locking disc 72 can be fixedly connected to the second shaft neck 62 by welding, or can be integrally cast with the second shaft neck 62. In this embodiment, the locking disc 72 is integrally formed on the second shaft neck 62.

[0056] Specifically, the locking block 73 is fixedly connected to the ear plate 5 by bolts 8 to facilitate the installation and removal of the locking block 73.

[0057] Specifically, the locking block 73 is in the shape of a toothed ring. By sleeving the locking block 73 outside the locking disc 72, the meshing of the locking block 73 with the locking disc 72 is realized. The toothed-ring-shaped locking block 73 can increase the meshing area between the locking block 73 and the locking disc 72, thereby improving the locking strength of the locking block 73 on the locking disc 72.

[0058] Refer to Figure 2 , the limiting component includes a threaded post 70 and a locking nut 71; wherein, the threaded post 70 is arranged at one end of the first shaft neck 61 away from the main shaft part 60, and part or all of it protrudes from the first shaft hole 50. The threaded post 70 can be welded to the first shaft neck 61, or can be integrally cast with the first shaft neck 61. In this embodiment, the threaded post 70 is integrally formed on the first shaft neck 61.

[0059] The locking nut 71 is threadedly connected to the threaded post 70 and is used to press against the outer side wall of the ear plate 5 to lock the first shaft neck 61. A washer 74 is sleeved on the threaded post 70, and the washer 74 is arranged between the locking nut 71 and the outer side wall of the ear plate 5. Through the washer 74, the acting force of the locking nut 71 on the ear plate 5 can be dispersed, reducing the abrasion problem caused by the interaction between the locking nut 71 and the ear plate 5, and at the same time reducing the possibility of the locking nut 71 loosening. Specifically, the washer 74 can be a metal washer 74 or an elastic rubber washer 74.

[0060] During assembly, the lugs on the hydraulic cylinder can be first embedded between the two ear plates 5, and then the eccentric shaft 6 is inserted through the second shaft hole 51 until the threaded column 70 passes through the first shaft hole 50. The first shaft neck 61 is embedded in the first shaft hole 50, and the second shaft neck 62 is embedded in the second shaft hole 51. Then, the locking block 73 is engaged with the locking disc 72 to lock the first shaft neck 61 and restrict the axial rotation of the eccentric shaft 6. Then, the locking nut 71 is tightened to restrict the axial and radial displacement of the eccentric shaft 6, thus completing the assembly conveniently and quickly.

[0061] In another embodiment, the limiting assembly may further include a limiting column and a limiting pin. One end of the limiting column is fixedly connected to the first shaft neck 61, and the other end protrudes from the first shaft hole 50. A pin hole is provided in the part of the limiting column protruding from the first shaft hole 50, and the limiting pin is inserted into the pin hole and abuts against the outer side wall of the ear plate 5, thereby restricting the axial displacement of the eccentric shaft 6.

[0062] Specifically, the specific size of the second shaft hole 51 can be determined according to the relative position of the first shaft neck 61 and the main shaft part 60, as long as the main shaft part 60 can pass through between the two ear plates 5 from the position of the second shaft hole 51. For example, when the diameter of the first shaft neck 61 is greater than the diameter of the main shaft part 60 or when only part of the end face of the first shaft neck 61 fits the end face of the main shaft part 60, the second shaft hole 51 is larger than the diameter of the main shaft part 60; when the diameter of the first shaft neck 61 is smaller than the diameter of the main shaft part 60 and the end face of the first shaft neck 61 completely fits the end face of the main shaft part 60, the second shaft hole 51 can be equal to the diameter of the main shaft part 60.

[0063] In this embodiment, the diameter of the first shaft neck 61 is smaller than the diameter of the main shaft part 60, the diameter of the second shaft neck 62 is greater than the diameter of the main shaft part 60, the diameter of the first shaft hole 50 is adapted to the first shaft neck 61, the diameter of the second shaft hole 51 is adapted to the second shaft neck 62, and the diameter of the second shaft hole 51 is large enough for the main shaft part 60 to pass through. During installation, the eccentric shaft 6 can be inserted through the second shaft hole 51 until the first shaft neck 61 is embedded and cooperates with the first shaft hole 50, and the second shaft neck 62 is embedded and cooperates with the second shaft hole 51.

[0064] When the position of the main shaft part 60 needs to be adjusted, the locking nut 71 is slightly loosened and the locking block 73 is removed. At this time, the eccentric shaft 6 can rotate and will not completely loosen under the pre-tightening force of the locking nut 71, so as to facilitate adjusting and positioning the eccentric shaft 6 to a predetermined position. Then, the eccentric shaft 6 is rotated to adjust the axis of the main shaft part 60. When adjusted to the predetermined position, the locking nut 71 is screwed onto the threaded column 70 to lock the first shaft neck 61, and the locking block 73 is fixedly connected to the ear plate 5, and the second shaft neck 62 is locked by the mutually engaged locking disc 72 and locking block 73.

[0065] A first identifier is provided on the locking disc 72, and a second identifier is provided on the locking block 73. Each time the eccentric shaft 6 is adjusted, the adjustment amount can be more precisely controlled by the relative positions of the first identifier and the second identifier. After the eccentric shaft 6 is adjusted to a predetermined angle or position, the locking disc 72 and the locking block 73 are engaged with each other, thereby achieving fine adjustment. Specifically, the first identifier and the second identifier can be scale lines.

[0066] One end of the locking disc 72 facing away from the second shaft neck 62 is provided with a polygonal screwing groove 620. When adjusting the eccentric shaft 6, a wrench with a specific shape can be inserted into the screwing groove 620 to rotate the wrench to adjust the eccentric shaft 6. Through the screwing groove 620, the eccentric shaft 6 can be adjusted more conveniently and quickly.

[0067] In another embodiment, without considering the installation convenience, the eccentric shaft 6 can also be rotatably supported on the ear plate 5 in a non-detachable manner. Specifically, during installation, first insert the eccentric shaft 6 into the ear seat at the end of the hydraulic cylinder, and then embed the first shaft neck 61 and the second shaft neck 62 of the eccentric shaft 6 into the shaft holes on the two ear plates 5 respectively, and then weld the ear plate 5 to the vehicle frame 2 to rotatably support the eccentric shaft 6 on the ear plate 5. On this basis, the locking mechanism 7 can include a single threaded column 70 or a single locking disc 72 structure, that is, fix the threaded column 70 on one of the shaft necks of the eccentric shaft 6 and lock it with a locking nut 71, or fix and connect the locking disc 72 on one of the shaft necks and lock it with the locking block 73 to achieve the purpose of locking the shaft neck.

[0068] In another embodiment, without considering the adjustment accuracy, the locking mechanism 7 can also adopt a structure of double threaded columns 70, that is, threaded columns 70 are provided at the ends of both the first shaft neck 61 and the second shaft neck 62, and two locking nuts 71 are respectively threadedly connected to the threaded columns 70 at the ends of the first shaft neck 61 and the second shaft neck 62 and abutted against the outer side surfaces of the ear plates 5 to achieve the purpose of locking the first shaft neck 61 and the second shaft neck 62.

[0069] Refer to Figure 1 , a connecting seat 9 is provided on the connecting frame 3, and the piston rod of the hydraulic cylinder is hinged to the connecting seat 9 through a pin shaft. Specifically, the connecting frame 3 includes two connecting arms 30 arranged at intervals, and a hinge seat 20 is fixedly connected to the vehicle frame 2 at a position corresponding to the connecting arm 30, and the connecting arm 30 and the hinge seat 20 are hinged through a pin shaft.

[0070] The ear plate 5 is located between two hinge seats 20, and one end of the connecting arm 30 away from the hinge seat 20 is connected to the bulldozing blade 1. The connecting seat 9 includes two connecting plates arranged at intervals, and hinge holes for the pin shaft to pass through are formed in the connecting plates. The two connecting plates are respectively fixedly connected to the connecting arm 30 through connecting rods 90. When connecting the piston rod of the hydraulic cylinder, the ear seat at the end of the piston rod of the hydraulic cylinder can be embedded between the two connecting plates, and then the pin shaft is inserted through one of the hinge holes and passes out from the other hinge hole, so as to hinge the piston rod of the hydraulic cylinder to the connecting seat 9, improving the convenience of connecting the piston rod of the hydraulic cylinder to the connecting frame 3.

[0071] In another embodiment, the connecting seat 9 can also be fixedly connected to the bulldozing blade 1.

[0072] It can be understood that according to the differences in machine models and structures, the eccentric distance of the eccentric shaft 6, the density of the teeth on the locking disc 72 and the locking block 73, the installation position of the ear plate 5, etc. can all be adjusted according to actual needs.

[0073] The working machine provided by the present invention will be described below, and the connection structure between the driving device and the vehicle frame described below can be mutually referred to the connection structure between the driving device and the vehicle frame described above.

[0074] A working machine includes a vehicle frame 2 and a driving device 4, and the vehicle frame 2 and the driving device 4 are connected through the above-mentioned connection structure between the driving device and the vehicle frame.

[0075] When the above-mentioned working machine is a bulldozer, it can also include a vehicle body, a bulldozing blade 1 and a connecting frame 3; the vehicle frame 2 is fixedly connected to the vehicle body by welding; one end of the connecting frame 3 is connected to the bulldozing blade 1, and the other end is hinged to the vehicle frame 2; one end of the driving device 4 away from the eccentric shaft 6 is hinged to the connecting frame 3.

[0076] The innovation point of the present invention is that in actual production, when assembling each component, when an out-of-tolerance problem occurs, the bolt 8 is unscrewed, the locking block 73 is removed from the ear plate 5, and then the locking nut 71 is slightly loosened. A tool with a specific shape such as a wrench is inserted into the screwing groove 620, and the wrench is rotated to make the eccentric shaft 6 rotate. According to the relative positions of the first mark on the locking disc 72 and the second mark on the locking block 73, the rotation angle of the eccentric shaft 6 can be adjusted with high precision. After adjusting to the predetermined angle, the locking block 73 is buckled on the locking disc 72, and the second shaft neck 62 is locked by meshing the locking block 73 with the locking disc 72. To sum up, by rotating the eccentric shaft 6 to adjust the rotation center of the hydraulic cylinder on the vehicle frame 2 to adjust the lifting height of the bulldozing blade 1 and compensate for the errors caused by welding, machining and overall assembly, etc., compared with the prior art, the requirement for the process level can be reduced, and at the same time, problems such as increased cost and reduced structural safety factor caused by reworking and rewelding of out-of-tolerance products can be reduced.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connection structure between a driving device and a vehicle frame, characterized in that Comprising: A pair of ear plates (5) fixedly connected to the vehicle frame (2), and a pair of corresponding shaft holes are provided on the pair of ear plates (5); An eccentric shaft (6), including a main shaft portion (60) and shaft necks respectively provided at both ends of the main shaft portion (60), and the axis line of the shaft neck is offset from the axis line of the main shaft portion (60); the shaft necks at both ends of the eccentric shaft (6) are respectively rotatably matched with the shaft holes on the pair of ear plates (5); a driving device (4) is rotatably sleeved on the main shaft portion (60); A locking mechanism (7) for locking the shaft neck to limit the rotation of the eccentric shaft (6).

2. The connection structure between the driving device and the vehicle frame according to claim 1, wherein The locking mechanism (7) includes: A locking disc (72) fixedly connected to the end of one of the shaft necks, and the locking disc (72) is in the shape of a gear; A locking block (73) detachably and fixedly connected to the ear plate (5), and teeth are provided on the locking block (73) and meshed with the locking disc (72); A limiting component provided at the end of the other shaft neck for limiting the axial and radial displacement of the eccentric shaft (6).

3. The connection structure between the driving device and the vehicle frame according to claim 2, characterized in that, The limiting component includes: A threaded post (70) fixedly connected to the end of the shaft neck, and a part or all of the threaded post (70) protrudes from the shaft hole; A locking nut (71) threadedly connected to the threaded post (70), and the locking nut (71) abuts against the outer side wall of the ear plate (5).

4. The connection structure between the drive device and the vehicle frame according to claim 2, characterized in that, A first mark is provided on the locking disc (72), and a second mark is provided on the locking block (73) for marking the relative positions of the locking disc (72) and the locking block (73).

5. The connection structure between the driving device and the vehicle frame according to claim 2 or 4, characterized in that, The locking block (73) is in the shape of a toothed ring and sleeved outside the locking disc (72).

6. The connection structure between the driving device and the vehicle frame according to claim 2, characterized in that The locking block (73) is fixedly connected to the ear plate (5) by a bolt (8).

7. The connection structure between the driving device and the vehicle frame according to claim 3, characterized in that, One of the shaft necks is a first shaft neck (61), and the shaft hole mating with the first shaft neck (61) is a first shaft hole (50); the other shaft neck is a second shaft neck (62), and the shaft hole mating with the second shaft neck (62) is a second shaft hole (51); The threaded post (70) is provided on the first shaft neck (61), and the diameter of the threaded post (70) is not greater than the diameter of the first shaft hole (50); The diameter of the second shaft hole (51) is not less than the diameter of the main shaft portion (60) for allowing the main shaft portion (60) to pass through and enter between the two ear plates (5).

8. The connection structure between the driving device and the vehicle frame according to claim 3, characterized in that, A washer (74) is provided between the locking nut (71) and the outer side wall of the ear plate (5).

9. An earthmoving machine, characterized in that, Comprising a vehicle frame (2) and a driving device (4), and the vehicle frame (2) and the driving device (4) are connected by the connection structure of the driving device and the vehicle frame according to any one of claims 1-8.

10. The work machine according to claim 9, characterized in that, Further comprising a vehicle body, a bulldozing blade (1) and a connecting frame (3); The vehicle frame (2) is fixedly connected to the vehicle body; One end of the connecting frame (3) is connected to the bulldozing blade (1), and the other end is hinged to the vehicle frame (2); One end of the driving device (4) away from the eccentric shaft (6) is hinged to the connecting frame (3).

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