Lifting device and loader applying same

Abstract

The utility model relates to the field of loaders, and discloses a lifting device and a loader with the lifting device. The arm body is arranged above the frame body and is provided with a first end part and a second end part; the first connecting rod, the second connecting rod and the first driving piece are hinged between the frame body and the second end part. In the height direction, the first hinge point of the first connecting rod and the frame body is located above the third hinge point of the second connecting rod and the frame body and located above the fifth hinge point of the first driving piece and the frame body. In the horizontal direction, the fifth hinge point is located between the first hinge point and the third hinge point. From the first end part to the second end part, a fourth hinge point of the second connecting rod and the second end part is positioned between a second hinge point of the first connecting rod and the second end part and a sixth hinge point of the first driving piece and the second end part; the distance between the second hinge point and the fourth hinge point is larger than the length of the first connecting rod and smaller than the length of the second connecting rod. And by reasonably arranging the positions of the hinge points, the smoothness of the motion trail of the arm body is improved, and material scattering is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of loading machinery, in particular to a lifting device and a loader using the same. Background Art

[0002] At present, some loading machines use vertical lifting devices to lift the working end to meet the needs of diverse working conditions and obtain better unloading height and unloading distance.

[0003] In related technical solutions, vertical lifting devices typically utilize a lifting cylinder and connecting rod structure to lift the working end. However, the layout of the lifting cylinder and connecting rod structure is often not rational, resulting in a large fluctuation range in the working end's motion trajectory, inflection points, poor fluidity, and easy material spillage. Utility Model Content

[0004] In view of this, the utility model provides a lifting device and a loader using the same, so as to solve the problem of poor smoothness of movement of the existing vertical lifting device.

[0005] In a first aspect, the utility model provides a lifting device, comprising: a frame; an arm body, which is arranged above the frame body; the arm body has a first end and a second end relative to each other, and the first end has a lowest position and a highest position; a first connecting rod, one end of the first connecting rod is hinged to the frame body to form a first hinge point; the other end of the first connecting rod is hinged to the second end to form a second hinge point; a second connecting rod is located on a side of the first connecting rod close to the first end; one end of the second connecting rod is hinged to the frame body to form a third hinge point; the other end of the second connecting rod is hinged to the second end to form a fourth hinge point; a first driving member, one end of the first driving member is hinged to the frame body to form a fifth hinge point ; The other end of the first driving member is hinged to the second end to form a sixth hinge point; the first driving member is suitable for moving the first end between the lowest position and the highest position when extended or shortened; wherein, in the first direction, the first hinge point is above the third hinge point and above the fifth hinge point; in the second direction, the fifth hinge point is between the first hinge point and the third hinge point; in the direction from the first end to the second end, the fourth hinge point is between the second hinge point and the sixth hinge point; the distance between the second hinge point and the fourth hinge point is greater than the length of the first connecting rod and less than the length of the second connecting rod; wherein, the first direction is the height direction, and the second direction is the horizontal direction.

[0006] Optionally, when the first end is at the lowest position, the second hinge point is located on the side of the first hinge point close to the first end; and / or, when the first end is at the lowest position, the connection between the first drive member and the arm body is set at an angle, and the angle range of the angle is 80°-100°; and / or, the lifting device is applied to a loader, the loader includes a cab and a travel drive device, and the travel drive device has a travel device drive shaft; in the second direction, the third hinge point is located between the cab and the travel device drive shaft.

[0007] Optionally, the frame has a head and a tail, and the first connecting rod, the second connecting rod and the first driving member are all hinged to the tail; the second end and the first connecting rod are located on the side of the tail close to the head, and the first end is located on the side of the head away from the tail.

[0008] Optionally, the arm body includes a middle part, one end of the middle part is plugged into the first end part, and a first hinge hole is formed at the connection between the middle part and the first end part, and the first hinge hole is used to connect the loading device; the other end of the middle part is plugged into the second end part, and a second hinge hole is formed at the connection between the middle part and the second end part, and the first driving member is hinged to the second end part through the second hinge hole.

[0009] Optionally, two groups of arms are provided, and the two groups of arms are spaced apart along the third direction, and the opposite side of the two groups of arms is the inner side; the first end portion includes a first straight section, a bent section and a second straight section connected in sequence, the first straight section is plugged into the middle portion, the bent section is bent toward the inside, and the second straight section is used to connect the loading device; along the third direction, the setting size of the first straight section is larger than the setting size of the second straight section; wherein the third direction is perpendicular to the first direction and the second direction.

[0010] Optionally, the first end portion includes a first side panel, a second side panel, a top panel and a bottom panel, the first side panel and the second side panel are spaced apart along the third direction, the top panel is connected to and covers the top of the first side panel and the second side panel, and the bottom panel is connected to and covers the bottom of the first side panel and the second side panel; the first side panel, the second side panel, the top panel and the bottom panel together form a first straight section, a bent section and a second straight section; wherein, in the bent section, the top panel protrudes from the first side panel on one side along the third direction, and / or, the top panel protrudes from the second side panel on the other side along the third direction; and / or, in the bent section, the bottom panel protrudes from the first side panel on one side along the third direction, and / or, the bottom panel protrudes from the second side panel on the other side along the third direction.

[0011] Optionally, in the extension direction of the first straight section, the end surface of the first side plate away from the second straight section, the end surface of the second side plate away from the second straight section, the end surface of the top plate away from the second straight section and the end surface of the bottom plate away from the second straight section are arranged alternately.

[0012] Optionally, the arm body also includes a first hinged seat, the inner side of the first straight section has an inner side surface, the inner side of the bent section has a bent surface, the first hinged seat is fitted and connected to at least part of the structure of the inner side surface, and is fitted and connected to at least part of the structure of the bent surface.

[0013] Optionally, the lifting device further includes a first crossbeam and a second crossbeam, wherein the first crossbeam is fixedly connected between the two first ends of the two groups of arms; and the second crossbeam is fixedly connected between the two second ends of the two groups of arms.

[0014] In a second aspect, the present invention further provides a loader, comprising: the lifting device as described above; and a loading device connected to the first end portion of the arm.

[0015] In this solution, the frame and arm form a four-bar linkage using a first link and a second link, and a first drive member provides driving force for the arm. In the vertical direction, the first hinge point between the first link and the frame is located above the third hinge point between the second link and the frame, and above the fifth hinge point between the first drive member and the frame; in the horizontal direction, the fifth hinge point is located between the first hinge point and the third hinge point; and in the direction from the first end to the second end of the arm, the fourth hinge point between the second link and the second end is located between the second hinge point between the first link and the second end and the sixth hinge point between the first drive member and the second end; and the distance between the second hinge point and the fourth hinge point is greater than the length of the first link and less than the length of the second link. The technical solution of the utility model can shorten the length of the first connecting rod and the second connecting rod by rationally arranging the points of the four-bar linkage, so that the structure of the lifting device is compact and the appearance is smooth; and during the lifting process, the first end of the arm can first extend forward for a distance, and then perform an upward movement approximately vertically. The motion trajectory of the entire process has no large fluctuations and no mutation points, which improves the smoothness of the lifting and avoids problems such as material spillage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1-Figure 5 This is a schematic diagram of the motion state of a lifting device during the lifting process according to an embodiment of the utility model; wherein, Figure 1 is a structural schematic diagram when the first end portion of the arm is at the lowest position; Figure 2 Schematic diagram of the structure in a certain state when the first connecting rod rotates clockwise; Figure 3 Schematic diagram of the structure when the first connecting rod rotates from clockwise to counterclockwise; Figure 4 It is a structural diagram of a certain state when the first connecting rod rotates counterclockwise; Figure 5 is a structural schematic diagram when the first end portion of the arm is at the highest position;

[0018] Figure 6 This is a schematic structural diagram of an arm body according to an embodiment of the present utility model;

[0019] Figure 7 A top view of another arm body according to an embodiment of the present invention;

[0020] Figure 8 A three-dimensional diagram of another arm body according to an embodiment of the present invention;

[0021] Figure 9 This is a structural schematic diagram of a first connecting rod in an embodiment of the present utility model.

[0022] Description of reference numerals:

[0023] 1. Arm; 2. First connecting rod; 3. Second connecting rod; 4. First driving member; 5. Frame; 5a. Head; 5b. Tail; 6. First crossbeam; 7. Second crossbeam; 8. Cab; 9. Second articulated seat; 10. Travel device drive shaft; 11. First end portion; 11a. First straight section; 11b. Bent section; 11c. Second straight section; 12. Middle portion; 13. Second end portion; 14. First hinge hole; 15. Second hinge hole; 16. Outer bending plate; 17. Inner bending plate; 18. 1. First outer flat plate; 19. First inner flat plate; 20. Second outer flat plate; 21. Second inner flat plate; 22. First hinge seat; 23. Inner side surface; 24. Bending surface; 25. First reinforcing plate; 26. Second reinforcing plate; 27. First side plate; 28. Second side plate; 29. ​​Top plate; 30. Bottom plate; 31. Third side plate; 32. Fourth side plate; 33. Fifth side plate; 34. Sixth side plate; 35. Connecting plate; 36. Third reinforcing plate; 37. Second driving member; 38. Bucket;

[0024] A, first hinge point; B, second hinge point; C, third hinge point; D, fourth hinge point; E, fifth hinge point; F, sixth hinge point;

[0025] Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION

[0026] 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.

[0027] The following combination Figures 1 to 9 , describing the embodiments of the present utility model.

[0028] According to an embodiment of the present utility model, a loader is provided, which includes a lifting device and a loading device. The lifting device includes an arm body 1 and a frame body 5. The arm body 1 has a first end 11 and a second end 13 arranged opposite to each other, wherein the first end 11 is connected to the loading device, and the second end 13 is hinged to the frame body 5.

[0029] It is understood that the present invention does not specifically limit the type of loader, as long as the lifting device of the present invention can be used to achieve the lifting and lowering operations of the loader. The loader of the present invention includes but is not limited to wheel loaders, crawler loaders and other skid loaders.

[0030] Further, if Figure 1 As shown, the lifting device includes the above-mentioned frame 5, the above-mentioned arm 1, the first connecting rod 2, the second connecting rod 3 and the first driving member 4. The arm 1 is arranged above the frame 5, and the arm 1 has a first end 11 and a second end 13 arranged relatively. The first end 11 of the arm 1 is connected to the loading device, and the first end 11 has a lowest position and a highest position. When the first end 11 moves between the lowest position and the highest position, it drives the loading device to rise or fall, thereby realizing the lifting or lowering operation of the material. The second end 13 of the arm 1 is hinged to the frame 5 through the first connecting rod 2 and the second connecting rod 3, and a first driving member 4 is arranged between the second end 13 of the arm 1 and the frame 5. The first driving member 4 is suitable for driving the second end 13 to rotate when extending or shortening, thereby moving the first end 11 between the lowest position and the highest position.

[0031] Exemplarily, the first driving member 4 can be a hydraulic cylinder, a pneumatic cylinder, an electric telescopic rod, etc., preferably a hydraulic oil cylinder, which has a simple structure and high reliability.

[0032] Specifically, one end of the first connecting rod 2 is hinged to the frame 5, forming a first hinge point A; the other end of the first connecting rod 2 is hinged to the second end 13, forming a second hinge point B. The second connecting rod 3 is located on the side of the first connecting rod 2 near the first end 11. One end of the second connecting rod 3 is hinged to the frame 5, forming a third hinge point C; the other end of the second connecting rod 3 is hinged to the second end 13, forming a fourth hinge point D. One end of the first driving member 4 is hinged to the frame 5, forming a fifth hinge point E. Specifically, the fixed end of the first driving member 4 is hinged to the frame 5. The other end of the first driving member 4 is hinged to the second end 13, forming a sixth hinge point F. Specifically, the driving end of the first driving member 4 is hinged to the second end 13. In the first direction Z, the first hinge point A is located above the third hinge point C and above the fifth hinge point E. In the second direction X, the fifth hinge point E is located between the first hinge point A and the third hinge point C. In the direction from the first end 11 to the second end 13, that is, in the extension direction of the arm 1, the fourth hinge point D is located between the second hinge point B and the sixth hinge point F. In addition, the distance between the second hinge point B and the fourth hinge point D is greater than the length of the first connecting rod 2 and less than the length of the second connecting rod 3.

[0033] The first direction Z is a height direction, and the second direction X is a horizontal direction.

[0034] It can be understood that in this embodiment, the setting length of the second connecting rod 3 is greater than the setting length of the first connecting rod 2.

[0035] It can be understood that in this embodiment, the arm 1 is arranged above the frame 5. Therefore, the hinge points of the first connecting rod 2, the second connecting rod 3 and the first driving member 4 with the arm 1 are located above the hinge points of the three with the frame 5, that is, the second hinge point B is located above the first hinge point A, the fourth hinge point D is located above the third hinge point C, and the sixth hinge point F is located above the fifth hinge point E.

[0036] In this embodiment, the frame 5 and arm 1 form a four-bar linkage using the first connecting rod 2 and the second connecting rod 3, and the first driving member 4 provides driving force for the arm 1. The technical solution of the utility model can shorten the length of the first connecting rod 2 and the second connecting rod 3 by rationally arranging the points of the four-bar linkage, making the lifting device compact and smooth in appearance. Moreover, during the lifting process, the first end 11 of the arm 1 can first extend forward for a certain distance and then perform an approximately vertical upward movement. The entire motion trajectory does not fluctuate significantly and there are no sudden changes, which improves the smoothness of the lifting and avoids problems such as material spillage.

[0037] It can be understood that the first connecting rod 2, the second connecting rod 3 and the first driving member 4 can be rotatably connected to the frame 5 and the arm 1 through a hinge shaft, and the above-mentioned hinge points are located on the axes of the hinge shafts corresponding to each hinge part.

[0038] In some embodiments, in order to ensure the telescopic stroke of the first driving member 4 and provide sufficient digging force for the arm 1, the fifth hinge point E between the first driving member 4 and the frame 5 is located at the bottom of the frame 5, that is, in the first direction Z, the fifth hinge point E is located below the first hinge point A and the third hinge point C.

[0039] In some embodiments, when the first end 11 is at the lowest position, the connection between the first driving member 4 and the arm body 1 is arranged at an angle, more specifically, the hinge connection between the first driving member 4 and the second end 13 is arranged at an angle, and the angle range is 80°-100°, so that the first driving member 4 and the arm body 1 are approximately perpendicular to each other, thereby providing a greater digging force for the arm body 1. Preferably, the angle range is 85°-95°, and more preferably, the angle is 90°, that is, the first driving member 4 and the arm body 1 are arranged perpendicular to each other.

[0040] More specifically, in some embodiments, the frame 5 is fixedly connected to a second hinge seat 9, and one end of the second connecting rod 3 is hinged to the second hinge seat 9, that is, the third hinge point C between the second connecting rod 3 and the frame 5 is formed on the second hinge seat 9. The second end 13 of the arm 1 is provided with a protrusion extending downward, and the other end of the second connecting rod 3 is hinged to the protrusion, that is, the fourth hinge point D between the second connecting rod 3 and the second end 13 is formed on the protrusion. Figure 1-5 As shown, in the first direction Z, that is, the height direction, the fourth hinge point D is always located below the second hinge point B and the sixth hinge point F.

[0041] Among them, the first hinge point A between the first link 2 and the frame 5, and the second hinge point B with the second end 13 are both located on the side of the third hinge point C and the fourth hinge point D away from the first end 11, that is, at the rear end of the loader.

[0042] Furthermore, in some embodiments, Figure 1 As shown, when the first end 11 is at the lowest position, the second hinge point B is located above the first hinge point A and biased toward the first end 11, that is, the second hinge point B is located on the side of the first hinge point A close to the first end 11, so as to provide a larger rotation space for the first connecting rod 2, which is beneficial to the compactness of the rear end structure of the four-bar linkage and the stability of the entire machine.

[0043] In some embodiments, the frame 5 has a head 5a and a tail 5b, and the first connecting rod 2, the second connecting rod 3 and the first driving member 4 are all hinged to the tail 5b. From the head 5a to the tail 5b of the frame 5, the second connecting rod 3, the first driving member 4 and the first connecting rod 2 are arranged in sequence, that is, the first connecting rod 2 is located on the rear side of the tail 5b of the frame 5. In addition, the second end 13 and the first connecting rod 2 are located on the side of the tail 5b close to the head 5a, and the first end 11 is located on the side of the head 5a away from the tail 5b. During the lifting process of the lifting device, the first end 11 and the first connecting rod 2 can always remain in front of the end face of the tail 5b of the frame 5, that is, the front side of the rear end of the entire machine, during the rotation process, so as to improve the operating performance in narrow spaces.

[0044] Specifically, the hinge between the first connecting rod 2 and the second end 13 is located at the end of the second end 13, so that during the lifting process, the end of the arm body 1 is roughly flush with the end face of the tail 5b of the frame body 5, or is located in front of the end face of the tail 5b of the frame body 5.

[0045] In some embodiments, the loader further includes a cab 8 and a travel drive unit. The cab 8 is fixedly connected to the top of the head 5a of the frame 5, and the arm 1 is located on at least one side of the cab 8. The travel drive unit is fixedly connected to the bottom of the frame 5 and is used to drive the loader. The travel drive unit has a travel drive shaft 10.

[0046] The third hinge point C between the second connecting rod 3 and the frame 5 is located on the side of the cab 8 near the rear portion 5b of the frame 5, that is, at the rear of the cab 8; and is also located above the travel device drive shaft 10, near the head portion 5a of the frame 5. In other words, in the second direction X, the third hinge point C is located between the cab 8 and the travel device drive shaft 10. More specifically, the third hinge point C is located at the rear of the cab 8 and in front of the travel device drive shaft 10. This arrangement improves the stability of the loader, ensures that the loader can withstand a large tipping load, and prevents tipping.

[0047] Among them, along the width direction of the cab 8, that is, Figure 1-Figure 5 In the third direction Y, the second connecting rod 3 is located on one side or on both symmetrical sides of the cab 8 in the third direction Y, and is located between the cab 8 and the first driving member 4. The second connecting rod 3 and the first driving member 4 are spaced apart in the third direction Y to avoid mutual interference. It can be understood that the third direction Y is perpendicular to both the first direction Z and the second direction X.

[0048] The lifting process of the utility model lifting device is as follows Figure 1-5 As shown:

[0049] When the loading device is at the lowest position, that is, when the first end portion 11 of the arm body 1 is at the lowest position, as shown in FIG. Figure 1When the lifting starts, the first driving member 4 extends. At this time, the first connecting rod 2 moves clockwise and the second connecting rod 3 moves counterclockwise. Figure 2 As shown; the first drive member 4 continues to extend and lift to Figure 3 When the second hinge point B, the fourth hinge point D and the third hinge point C are in a straight line, at this time, the first connecting rod 2 reaches the maximum deflection of clockwise rotation; when the first driving member 4 continues to extend and lift, the first connecting rod 2 starts to rotate counterclockwise driven by the second connecting rod 3, and the second connecting rod 3 continues to rotate counterclockwise, as shown in FIG. Figure 4 Continue lifting until Figure 5 In the position shown, the first connecting rod 2 reaches the maximum counterclockwise rotation, and the second connecting rod 3 also reaches the maximum counterclockwise rotation. At this time, the loading device is at the highest position, that is, the first end 11 of the arm body 1 is at the highest position.

[0050] During the entire lifting process, the first connecting rod 2 first moves clockwise and then counterclockwise, while the second connecting rod 3 always moves counterclockwise. The clockwise swing amplitude of the first connecting rod 2 is smaller than the counterclockwise swing amplitude, and the counterclockwise swing amplitude of the second connecting rod 3 is less than 65 degrees. This ensures that the ends of the first connecting rod 2 and the arm body 1 do not extend beyond the end surface of the tail portion 5b of the frame body 5, that is, within the rear end surface of the entire machine, improving operation performance in narrow spaces.

[0051] The lifting device of the present invention makes the structure of the rear end of the lifting device more compact, improves the stability of the structure, and the smoothness of the appearance by reasonably arranging the positions of the hinge points of the first connecting rod 2, the second connecting rod 3 and the first driving member 4 with the frame body 5 and the arm body 1; moreover, during the entire lifting process, the first end portion 11 of the arm body 1 first extends forward for a distance, and then makes an approximately vertical upward movement. The movement trajectory of the entire process is smooth, without large fluctuations, and there is no mutation point, thereby avoiding material spillage.

[0052] Furthermore, in some embodiments, Figure 6As shown, the arm body 1 has a three-section structure, specifically including the above-mentioned first end 11, the second end 13, and the middle portion 12 connected between the first end 11 and the second end 13. Among them, one end of the middle portion 12 is plugged into the first end 11, and the plug-in point of the middle portion 12 and the first end 11 forms a first hinge hole 14, and the first hinge hole 14 is used to connect the above-mentioned loading device. The other end of the middle portion 12 is plugged into the second end 13, and the plug-in point of the middle portion 12 and the second end 13 forms a second hinge hole 15, and the first driving member 4 is hinged to the second end 13 through the second hinge hole 15. With this arrangement, the first end 11, the second end 13 and the middle portion 12 form an integral structure. The first end 11, the second end 13 and the middle portion 12 jointly bear the bending moment at the first hinge hole 14 and the second hinge hole 15, providing the load-bearing capacity of the arm body 1.

[0053] It can be understood that the first hinge hole 14 is formed at the connection between the first end portion 11 and the middle portion 12, that is, the first end portion 11 and the middle portion 12 together form the first hinge hole 14, ensuring the structural strength of the first hinge hole 14. The second hinge hole 15 is formed at the connection between the second end portion 13 and the middle portion 12, that is, the second end portion 13 and the middle portion 12 together form the second hinge hole 15, ensuring the structural strength of the second hinge hole 15.

[0054] like Figure 1 As shown, the loading device specifically includes a second driving member 37 and a bucket 38 , wherein the driving end of the second driving member 37 is hinged to the bucket 38 , and the fixed end of the second driving member 37 is hinged in the first hinge hole 14 .

[0055] In some embodiments, the first end portion 11 of the arm body 1 is also fixedly connected to a first hinge seat 22, and the first hinge seat 22, the first hinge seat 22, the first end portion 11, and the middle portion 12 together form the first hinge hole 14, and the fixed end of the second driving member 37 is hinged to the arm body 1 through the first hinge seat 22 and the first hinge hole 14.

[0056] Exemplarily, the second driving member 37 can be a hydraulic cylinder, a pneumatic cylinder, an electric telescopic rod, etc., preferably a hydraulic oil cylinder, which has a simple structure and high reliability.

[0057] For example, the middle portion 12 can be configured as a rectangular beam structure, that is, the longitudinal cross-section of the middle portion 12 is rectangular, one end of the rectangular beam structure is inserted into the first end portion 11 and welded to the first end portion 11, and the other end is inserted into the second end portion 13 and welded to the second end portion 13. It is understood that the middle portion 12 can also be configured as other structures as long as they can adapt to the shapes and structures of the first end portion 11 and the second end portion 13.

[0058] Furthermore, in some embodiments, Figure 7 and Figure 8As shown, two groups of arms 1 are provided, spaced apart along the third direction Y. More specifically, the two groups of arms 1 are arranged parallel to either side of the cab 8 along the third direction Y, extending between the front and rear sides of the cab 8. Of the two first end portions 11 of the two groups of arms 1, the spacing along the third direction Y between the ends proximal to the loading device is smaller than the spacing between the ends proximal to the middle portion 12. This means that the front ends of the arms 1 adopt an inward-retracting structure, which reduces the forward extension of the front ends of the arms 1 and improves the stability and operating capacity of the lifting device.

[0059] Specifically, in some embodiments, the first end portion 11 includes a first straight section 11a, a bent section 11b, and a second straight section 11c, which are connected in sequence. The first straight section 11a is plugged into the middle portion 12, the bent section 11b is bent toward the inside of the arm body 1, and the second straight section 11c is used to connect to the loading device, so that the second straight section 11c is located inside the first straight section 11a. It should be noted that the inside of the arm body 1 refers to the opposite side of the two groups of arm bodies 1, that is, the side closer to the cab 8. For example, the first end portion 11 can be roughly "S"-shaped.

[0060] In some embodiments, along the third direction Y, the size of the first straight section 11 a is larger than the size of the second straight section 11 c , so as to facilitate connection with the bent section 11 b and ensure an inward retraction effect.

[0061] More specifically, in some embodiments, the first end portion 11 includes a first side panel 27, a second side panel 28, a top panel 29, and a bottom panel 30. The first side panel 27 and the second side panel 28 are spaced apart along the third direction Y. The top panel 29 connects to and covers the tops of the first and second side panels 27, 28, and the bottom panel 30 connects to and covers the bottoms of the first and second side panels 27, 28. The first side panel 27, the second side panel 28, the top panel 29, and the bottom panel 30 together form a first straight section 11a, a bent section 11b, and a second straight section 11c. The first side panel 27, the second side panel 28, the top panel 29, and the bottom panel 30 can completely seal the inner cavity of the arm body 1, making it less susceptible to rainwater intrusion and providing better corrosion resistance. For example, the first side panel 27, the second side panel 28, the top panel 29, and the bottom panel 30 can be connected to form an integrated structure by welding, plugging, clamping, bolting, or the like, preferably by welding.

[0062] In some embodiments, in the bending section 11b, the top plate 29 protrudes from the first side plate 27 on one side along the third direction Y, or the top plate 29 protrudes from the second side plate 28 on the other side along the third direction Y, or the top plate 29 protrudes from the first side plate 27 and the second side plate 28 on both sides along the third direction Y, so as to reduce stress concentration at the bending section 11b and improve structural strength.

[0063] In some embodiments, in the bending section 11b, the bottom plate 30 protrudes from the first side plate 27 on one side along the third direction Y, or the bottom plate 30 protrudes from the second side plate 28 on the other side along the third direction Y, or the bottom plate 30 protrudes from the first side plate 27 and the second side plate 28 on both sides along the third direction Y, so as to further reduce the stress concentration at the bending section 11b and improve the structural strength.

[0064] In some embodiments, at the bend section 11b, the top panel 29 protrudes from the first side panel 27 and the second side panel 28 on both sides along the third direction Y; and the bottom panel 30 protrudes from the first side panel 27 and the second side panel 28 on both sides along the third direction Y. That is, at the bend section 11b, the coverage area of ​​the top and bottom panels 30 is larger than the cross-sectional area of ​​the cavity formed between the first side panel 27 and the second side panel 28.

[0065] Specifically, if Figure 7 and Figure 8 As shown, the first side panel 27 is located on the outside of the arm body 1, and the second side panel 28 is located on the inside of the arm body 1. Towards the direction away from the middle portion 12, the first side panel 27 includes a first outer straight panel 18, an outer bent panel 16, and a second outer straight panel 20 connected in sequence. The first outer straight panel 18, the outer bent panel 16, and the second outer straight panel 20 can be integrally formed and roughly in an "S" shape. The second side panel 28 includes a first inner straight panel 19, an inner bent panel 17, and a second inner straight panel 21 connected in sequence. The first inner straight panel 19, the inner bent panel 17, and the second inner straight panel 21 can be integrally formed and roughly in an "S" shape.

[0066] Among them, the first outer straight plate 18 and the first inner straight plate 19 are arranged opposite to each other and form the above-mentioned first straight section 11a; the outer bent plate 16 and the inner bent plate 17 are arranged opposite to each other and both are bent toward the inner side of the arm body 1 to form the above-mentioned bent section 11b; the second outer straight plate 20 and the second inner straight plate 21 are arranged opposite to each other and form the above-mentioned second straight section 11c.

[0067] In some embodiments, the middle portion 12 is configured as a rectangular beam structure, and the second end portion 13 includes a third side panel 31 and a fourth side panel 32 spaced apart along the third direction Y. Along the third direction Y, the spacing between the first outer straight panel 18 and the first inner straight panel 19 is equal to the spacing between the third side panel 31 and the fourth side panel 32. Specifically, the spacing between the first outer straight panel 18 and the first inner straight panel 19, and the spacing between the third side panel 31 and the fourth side panel 32 are both equal to the dimension of the rectangular beam in the third direction Y, so as to facilitate insertion with the rectangular beam.

[0068] In some embodiments, as Figure 7As shown, in the third direction Y, the spacing between the second outer straight plate 20 and the second inner straight plate 21 is smaller than the spacing between the first outer straight plate 18 and the first inner straight plate 19, so that the dimension of the first straight section 11a is larger than the dimension of the second straight section 11c in the third direction Y. This arrangement facilitates the smooth connection between the first outer straight plate 18 and the second outer straight plate 20 at both ends of the outer bent plate 16, and the smooth connection between the first inner straight plate 19 and the second inner straight plate 21 at both ends of the inner bent plate 17, thereby improving the retraction effect of the arm body 1 and enhancing the stability of the entire device.

[0069] In some embodiments, a first reinforcing plate 25 is provided between the outer bending plate 16 and the inner bending plate 17 to improve the structural strength of the bending section 11b. Preferably, the first reinforcing plate 25 is plug-welded at the stress concentration point between the outer bending plate 16 and the inner bending plate 17 to make the structural strength more reliable.

[0070] Furthermore, in some embodiments, in the extension direction of the first straight section 11a, the end surface of the first side plate 27 away from the second straight section 11c, the end surface of the second side plate 28 away from the second straight section 11c, the end surface of the top plate 29 away from the second straight section 11c, and the end surface of the bottom plate 30 away from the second straight section 11c are staggered.

[0071] It can be understood that in this embodiment, the end faces of the first side panel 27, the second side panel 28, the top panel 29 and the bottom panel 30 are away from the second straight section 11c, that is, the end faces of the connections between the four and the middle portion 12, and the end faces of the connections between the four and the middle portion 12 are staggered, so that the lengths of the connections between the first outer straight panel 18, the first inner straight panel 19 and the top and bottom panels 30 at the first straight section 11a and the middle portion 12 are not consistent, thereby avoiding stress concentration at the connections and improving structural strength.

[0072] In some embodiments, the arm body 1 also includes a first articulated seat 22, and at least part of the structure of the first articulated seat 22 can be set at the bending section 11b. In the bending section 11b, the top protrudes from the first side panel 27 and the second side panel 28 on both sides along the third direction Y, and the bottom plate 30 protrudes from the first side panel 27 and the second side panel 28 on both sides along the third direction Y. This not only reduces the stress concentration of the inner bending plate 17 and the outer bending plate 16 at the bending section 11b, but also partially covers the first articulated seat 22, thereby simplifying the outer shape curve of the arm body 1 and making it simple and beautiful.

[0073] In some embodiments, the inner side of the first straight section 11a has an inner side surface 23, which is specifically the side surface of the first inner straight plate 19 away from the first outer straight plate 18. The inner side of the bent section 11b has a bent surface 24, which is specifically the side surface of the inner bent plate 17 away from the outer bent plate 16. The first hinge seat 22 is aligned with and connected to at least part of the structure of the inner side surface 23, and is aligned with and connected to at least part of the structure of the bent surface 24. Exemplarily, the first hinge seat 22 is welded to the inner side of the first end portion 11, and the connecting surface of the first hinge seat 22 is joined to both the inner side surface 23 and the bent surface 24, resulting in a larger welding area and more reasonable force.

[0074] In some embodiments, the lifting device also includes a first crossbeam 6 and a second crossbeam 7, the first crossbeam 6 is fixedly connected between the two first ends 11 of the two groups of arms 1; the second crossbeam 7 is fixedly connected between the two second ends 13 of the two groups of arms 1, so that the two groups of arms 1 are connected into an integral structure, thereby improving the stability of the lifting device.

[0075] For example, the first crossbeam 6 is disposed between the two sets of arms 1. Specifically, the first crossbeam 6 can be welded between the two second straight sections 11c of the two arms 1. To enhance the connection strength of the first crossbeam 6 at the second straight section 11c, a second reinforcing plate 26 can be provided on a side of the second outer straight plate 20 close to the second inner straight plate 21 and / or on a side of the second inner straight plate 21 close to the second outer straight plate 20.

[0076] The cross-sectional shape of the first cross-member 6 is circular, elliptical, rectangular, or irregular. Preferably, the cross-sectional shape of the first cross-member 6 is elliptical. Compared with a rectangular or circular shape, an elliptical shape can reduce the width of the first cross-member 6 in the front-to-back direction of the entire machine (i.e., the second direction X), and reduce the shear stress of the load of the loading device on the first end portion 11 of the arm body 1.

[0077] For example, the second crossbeam 7 extends between the two sets of arms 1. Specifically, the second crossbeam 7 can be welded to the second ends 13 of the two arms 1. The second crossbeam 7 can be located above the rear window of the cab 8 to avoid obstructing the driver's field of view. The second end 13 includes a third side panel 31 and a fourth side panel 32 spaced apart along the third direction Y. Several reinforcing panels can also be welded between the third side panel 31 and the fourth side panel 32 to provide both structural reinforcement and sealing.

[0078] The cross-sectional shape of the second cross beam 7 is circular, elliptical, rectangular, or irregular.

[0079] Furthermore, in some embodiments, Figure 9As shown, the first connecting rod 2 is welded together by a fifth side plate 33, a sixth side plate 34, a connecting plate 35, and a third reinforcing plate 36. The fifth side plate 33 is located outside the sixth side plate 34 and has a bent, inward-contracting structure to accommodate its installation on the vehicle frame. The third reinforcing plate 36 is welded to the fifth side plate 33, the sixth side plate 34, and the connecting plate 35 to form a box-like structure, enhancing the structural strength of the first connecting rod 2.

[0080] The lifting device of the present invention and the loader using the same have at least the following advantages:

[0081] 1. Reasonable arrangement of the hinge points between the first connecting rod 2, the second connecting rod 3 and the first driving member 4 and the arm body 1 and the frame body 5 can make the first connecting rod 2 and the second connecting rod 3 as short as possible, so that the rear end structure of the four-bar linkage is more compact, and the first end portion 11 of the arm body 1 adopts an inward-retracted structure, and the forward extension distance of the arm body 1 is short, thereby improving the stability and working capacity of the entire lifting device.

[0082] 2. During the lifting and lowering process of the lifting device, the first connecting rod 2 can always be located at the front of the rear end of the entire machine, and the tail end of the arm body 1 is basically flush with the rear end of the entire machine, thereby improving the operating performance in narrow spaces.

[0083] 3. The arm body 1 adopts a three-section structural design with a smooth appearance while ensuring side vision; the first end 11 and the second end 13 of the arm body 1 are respectively provided with a first crossbeam 6 and a second crossbeam 7 to enhance the strength of the whole machine; and the second crossbeam 7 is placed high to provide a good rear view; the middle part 12 adopts an integral rectangular beam, the two ends of which are inserted into the first end 11 and the second end 13, without the need for additional reinforcement plates, the overall structure is simple and the reliability is good.

[0084] 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. A lifting device, characterized in that: include: Frame (5); An arm body (1) is arranged above the frame body (5); the arm body (1) has a first end (11) and a second end (13) opposite to each other, and the first end (11) has a lowest position and a highest position; A first connecting rod (2), one end of the first connecting rod (2) is hinged to the frame (5) to form a first hinge point (A); the other end of the first connecting rod (2) is hinged to the second end portion (13) to form a second hinge point (B); A second connecting rod (3) is located on a side of the first connecting rod (2) close to the first end portion (11); one end of the second connecting rod (3) is hinged to the frame (5) to form a third hinge point (C); the other end of the second connecting rod (3) is hinged to the second end portion (13) to form a fourth hinge point (D); a first driving member (4), one end of the first driving member (4) being hinged to the frame (5) to form a fifth hinge point (E); the other end of the first driving member (4) being hinged to the second end portion (13) to form a sixth hinge point (F); the first driving member (4) being adapted to move the first end portion (11) between the lowest position and the highest position when the first driving member (4) is extended or shortened; Wherein, in the first direction (Z), the first hinge point (A) is located above the third hinge point (C) and above the fifth hinge point (E); in the second direction (X), the fifth hinge point (E) is located between the first hinge point (A) and the third hinge point (C); In the direction from the first end (11) to the second end (13), the fourth hinge point (D) is located between the second hinge point (B) and the sixth hinge point (F); the distance between the second hinge point (B) and the fourth hinge point (D) is greater than the length of the first connecting rod (2) and less than the length of the second connecting rod (3); The first direction (Z) is the height direction, and the second direction (X) is the horizontal direction.

2. The lifting device according to claim 1, characterized in that When the first end portion (11) is at the lowest position, the second hinge point (B) is located on a side of the first hinge point (A) close to the first end portion (11); and / or, When the first end portion (11) is at the lowest position, the connection between the first driving member (4) and the arm body (1) is arranged at an angle, and the angle range of the angle is 80°-100°; and / or, The lifting device is applied to a loader, the loader comprising a cab (8) and a travel drive device, the travel drive device having a travel device drive shaft (10); In the second direction (X), the third hinge point (C) is located between the cab (8) and the travel device drive shaft (10).

3. The lifting device according to claim 2, characterized in that The frame (5) has a head (5a) and a tail (5b), and the first connecting rod (2), the second connecting rod (3) and the first driving member (4) are all hinged to the tail (5b); the second end (13) and the first connecting rod (2) are located on a side of the tail (5b) close to the head (5a), and the first end (11) is located on a side of the head (5a) away from the tail (5b).

4. The lifting device according to any one of claims 1 to 3, characterized in that: The arm body (1) includes a middle portion (12), one end of the middle portion (12) is plugged into the first end portion (11), and a first hinge hole (14) is formed at the plug-in position of the middle portion (12) and the first end portion (11), and the first hinge hole (14) is used to connect a loading device; the other end of the middle portion (12) is plugged into the second end portion (13), and a second hinge hole (15) is formed at the plug-in position of the middle portion (12) and the second end portion (13), and the first driving member (4) is hinged to the second end portion (13) through the second hinge hole (15).

5. The lifting device according to claim 4, characterized in that The arm bodies (1) are provided in two groups, and the two groups of arm bodies (1) are spaced apart along the third direction (Y), and the opposite side of the two groups of arm bodies (1) is the inner side; The first end portion (11) comprises a first straight section (11a), a bent section (11b) and a second straight section (11c) connected in sequence, the first straight section (11a) being plugged into the middle portion (12), the bent section (11b) being bent inward, and the second straight section (11c) being used for connecting to the loading device; Along the third direction (Y), the setting size of the first straight section (11a) is larger than the setting size of the second straight section (11c); The third direction (Y) is perpendicular to the first direction (Z) and the second direction (X).

6. The lifting device according to claim 5, characterized in that The first end portion (11) comprises a first side panel (27), a second side panel (28), a top panel (29) and a bottom panel (30); the first side panel (27) and the second side panel (28) are spaced apart along a third direction (Y); the top panel (29) is connected to and covers the tops of the first side panel (27) and the second side panel (28); the bottom panel (30) is connected to and covers the bottoms of the first side panel (27) and the second side panel (28); the first side panel (27), the second side panel (28), the top panel (29) and the bottom panel (30) together form the first straight section (11a), the bent section (11b) and the second straight section (11c); Wherein, in the bending section (11b), one side of the top plate (29) along the third direction (Y) protrudes from the first side plate (27), and / or, the other side of the top plate (29) along the third direction (Y) protrudes from the second side plate (28); and / or, In the bending section (11b), one side of the bottom plate (30) along the third direction (Y) protrudes from the first side plate (27), and / or the other side of the bottom plate (30) along the third direction (Y) protrudes from the second side plate (28).

7. The lifting device according to claim 6, characterized in that In the extension direction of the first straight section (11a), the end surface of the first side plate (27) away from the second straight section (11c), the end surface of the second side plate (28) away from the second straight section (11c), the end surface of the top plate (29) away from the second straight section (11c) and the end surface of the bottom plate (30) away from the second straight section (11c) are arranged alternately.

8. The lifting device according to claim 5, characterized in that The arm body (1) further comprises a first hinge seat (22), the inner side of the first straight section (11a) comprises an inner side surface (23), the inner side of the bent section (11b) comprises a bent surface (24), and the first hinge seat (22) is fitted and connected to at least a portion of the structure of the inner side surface (23), and is fitted and connected to at least a portion of the structure of the bent surface (24).

9. The lifting device according to claim 5, characterized in that The lifting device further comprises a first crossbeam (6) and a second crossbeam (7), wherein the first crossbeam (6) is fixedly connected between the two first end portions (11) of the two groups of arm bodies (1); and the second crossbeam (7) is fixedly connected between the two second end portions (13) of the two groups of arm bodies (1).

10. A loader, characterized in that: include: The lifting device according to any one of claims 1 to 9; A loading device is connected to the first end portion (11) of the arm (1).

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