Loader movable arm and loader

Abstract

The utility model provides a loader movable arm and a loader, and relates to the technical field of loaders. The loader movable arm comprises two movable arm plates arranged oppositely and a cross beam arranged between the two movable arm plates. Wherein each movable arm plate is bent into a preset angle, a first pin hole used for fixing a movable arm hydraulic cylinder is formed in the bent position of each movable arm plate, and a stress dispersion plate is arranged at the position of the first pin hole of each movable arm plate. According to the scheme, the stress at the first pin hole of the movable arm plate can be dispersed through the stress dispersion plate, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to loader technical field especially relates to a loader arm and loader. BACKGROUND

[0002] The loader is one kind of engineering machinery, and is widely used in highway, railway, building, water and electricity, port, mine and other engineering fields. On the frame of the loader, the movable arm for connecting the movable arm oil cylinder, the bucket and the rocker arm is installed, and the movable arm is an important load-bearing component. However, the movable arm of the prior art is prone to stress concentration at the movable arm oil cylinder mounting position, thereby affecting the service life of the movable arm. SUMMARY

[0003] The technical scheme of the utility model provides a loader arm and loader to solve the problem of stress concentration at the movable arm oil cylinder mounting position of the prior art.

[0004] In order to solve the above technical problem, the embodiment of the utility model provides the following technical scheme:

[0005] A loader arm, comprising:

[0006] Two movable arm plates arranged oppositely and a cross beam arranged between the two movable arm plates;

[0007] Wherein, each movable arm plate is bent at a preset angle, and a first pin hole for fixing the movable arm hydraulic cylinder is arranged at the bent portion of each movable arm plate, and a stress dispersion plate is arranged at the first pin hole of each movable arm plate.

[0008] Optionally, the loader arm, wherein the stress dispersion plate is attached to the bent portion of the movable arm plate.

[0009] Optionally, the loader arm, wherein the shape of the stress dispersion plate matches the shape of the bent portion of the movable arm plate, the stress dispersion plate comprises two opposite arc sides, and the two ends of the two arc sides are connected by an arc curved surface.

[0010] Optionally, the loader arm, wherein the radius of one of the arc sides ranges from 150mm to 200mm.

[0011] Optionally, the loader arm, wherein the radius of the other arc side ranges from 100mm to 130mm.

[0012] Optionally, the loader arm, wherein the two ends of each movable arm plate are respectively provided with a second pin hole for fixing the bucket and a third pin hole for fixing the frame.

[0013] Optionally, the loader arm, wherein the second pin hole of each of the arm plates is provided with the stress dispersion plate.

[0014] Optionally, the loader arm, wherein the third pin hole of each of the arm plates is provided with the stress dispersion plate.

[0015] Optionally, the loader arm, wherein the cross beam is provided with two symmetrical ear plates, and the ear plates are parallel to the arm plates.

[0016] A loader comprising the loader arm according to any one of the preceding claims.

[0017] The loader has the advantages that:

[0018] The loader arm comprises two oppositely arranged arm plates and a cross beam arranged between the two arm plates, wherein each of the arm plates is bent at a preset angle, and the first pin hole for fixing the arm hydraulic cylinder is arranged at the bent portion of each of the arm plates, and the stress dispersion plate is arranged at the first pin hole of each of the arm plates.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are used to better understand the present application, and do not constitute a limitation on the present application. Among them:

[0021] Figure 1 Fig. 1 shows a structure schematic diagram of the loader arm according to an embodiment of the present application;

[0022] Figure 2 Fig. 2 shows a structure schematic diagram of the loader arm according to another embodiment of the present application;

[0023] Figure 3 Fig. 3 shows a structure schematic diagram of the loader arm according to still another embodiment of the present application;

[0024] Figure 4 Fig. 4 shows a structure schematic diagram of the stress dispersion plate according to an embodiment of the present application;

[0025] Figure 5Structure schematic view two of stress dispersion plate of the embodiment of the utility model.

[0026] Mark explanation:

[0027] 1 - movable arm plate;

[0028] 2 - crossbeam;

[0029] 3 - first pin hole;

[0030] 4 - stress dispersion plate;

[0031] 41 - first arc side surface;

[0032] 42 - second arc side surface;

[0033] 43 - first arc curved surface;

[0034] 44 - second arc curved surface;

[0035] 45 - through hole;

[0036] 5 - second pin hole;

[0037] 6 - third pin hole;

[0038] 7 - ear plate. Specific implementation

[0039] The exemplary embodiments of the utility model are described below in conjunction with the drawings, including various details of the embodiment of the utility model to help understanding, which should be considered only as exemplary. Therefore, those skilled in the art should realize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the utility model. Similarly, in order to be clear and concise, the description of well-known functions and structures is omitted in the following description.

[0040] The embodiment of the utility model provides a loader movable arm.

[0041] As shown in Figures 1 to 5 The loader movable arm comprises:

[0042] Two movable arm plates 1 arranged oppositely and a crossbeam 2 arranged between the two movable arm plates 1.

[0043] Wherein, each movable arm plate 1 is bent into a preset angle, and a first pin hole 3 for fixing a movable arm hydraulic cylinder is arranged at the bent part of each movable arm plate 1, and a stress dispersion plate 4 is arranged at the first pin hole 3 of each movable arm plate 1.

[0044] The utility model discloses an embodiment of the utility model discloses two dynamic arm boards 1 symmetry arrangement, and two dynamic arm boards 1 are connected through the crossbeam 2. The first pin hole 3 at the bending of each dynamic arm board 1 is provided with the stress dispersion board 4, and the stress dispersion board 4 is used for dispersing the stress at the first pin hole 3 of the dynamic arm board 1, prevents the first pin hole 3 at the dynamic arm board 1 from cracking, breaking, disconnecting due to stress concentration, thereby prolongs the service life of the loader arm.

[0045] Optionally, the stress dispersion board 4 is arranged at the first pin hole 3 of the dynamic arm board 1 by welding process. Corresponding to the first pin hole 3, the surface of the stress dispersion board 4 is provided with a through hole 45. It can be understood that the stress dispersion board 4 is welded on the surface of the bending of the dynamic arm board 1, and the through hole 45 of the stress dispersion board 4 is arranged corresponding to the first pin hole 3, so that the pin shaft can pass through the through hole 45 of the stress dispersion board 4 and the first pin hole 3.

[0046] Optionally, the crossbeam 2 is fixedly connected with the two dynamic arm boards 1 by welding process.

[0047] Optionally, the stress dispersion board 4 is a streamline plate.

[0048] As an optional embodiment, the crossbeam 2 is provided with two symmetrical lug plates 7, and the lug plate 7 is parallel to the dynamic arm board 1.

[0049] In the embodiment of the utility model, the lug plate 7 is provided with a pin hole for fixing a rocker arm. The lug plate 7 is fixedly connected with the crossbeam 2 by welding process.

[0050] As an optional embodiment, the two ends of each dynamic arm board 1 are respectively provided with a second pin hole 5 for fixing a shovel and a third pin hole 6 for fixing a rack.

[0051] Optionally, the second pin hole 5 of each dynamic arm board 1 is provided with the stress dispersion board.

[0052] It should be noted that the stress dispersion board at the second pin hole 5 of each dynamic arm board 1 is used for dispersing the stress at the second pin hole 5, preventing the second pin hole 5 of the dynamic arm board 1 from cracking, breaking, disconnecting due to stress concentration, thereby prolonging the service life of the loader arm.

[0053] Optionally, the third pin hole 6 of each dynamic arm board 1 is provided with the stress dispersion board.

[0054] It should be noted that the stress dispersion plate at the third pin hole 6 of each boom plate 1 is used to disperse the stress at the third pin hole 6, to prevent cracking, breakage or disconnection at the third pin hole 6 of the boom plate 1 due to stress concentration, thereby extending the service life of the loader boom.

[0055] As an optional embodiment, the stress dispersion plate 4 is fitted to the bend of the boom plate 1.

[0056] In this embodiment of the present invention, since the first pin hole 3 is located at the bend of the boom plate 1, and the stress dispersion plate 4 is provided at the first pin hole 3, and the stress dispersion plate 4 is in contact with the bend of the boom plate 1, the stress dispersion plate 4 can not only disperse the stress at the first pin hole 3, but also disperse the stress at the bend of the boom plate 1, thereby optimizing the mechanical properties of the boom plate 1 and avoiding stress concentration.

[0057] As an optional embodiment, the shape of the stress dispersion plate 4 matches the shape of the bend of the boom plate 1. The stress dispersion plate 4 includes two opposing arcuate sides, and the two ends of the two arcuate sides are connected by an arcuate surface.

[0058] In this embodiment of the utility model, such as Figure 4 As shown, the stress dispersion plate 4 includes a first arcuate side surface 41 and a second arcuate side surface 42. The first end of the first arcuate side surface 41 and the first end of the second arcuate side surface 42 are connected by a first arcuate surface 43, and the second end of the first arcuate side surface 41 and the second end of the second arcuate side surface 42 are connected by a second arcuate surface 44.

[0059] Optionally, the radius of one of the said arcuate sides ranges from 150 mm to 200 mm.

[0060] It should be noted that, Figure 4 The radius of the first arcuate side surface 41 ranges from 150 mm to 200 mm, and preferably, the radius of the first arcuate side surface 41 is 180 ± 5 mm.

[0061] Alternatively, the radius of the other said arcuate side can range from 100 mm to 130 mm.

[0062] It should be noted that, Figure 4 The radius of the second arcuate side surface 42 ranges from 100 mm to 130 mm, and preferably, the radius of the second arcuate side surface 42 is 115 ± 5 mm.

[0063] In conclusion, the loader arm described in the embodiment of the utility model, the stress dispersion plate 4 is arranged at the first pin hole 3 of the arm plate 1, the mechanical properties of the arm plate 1 can be optimized, the stress at the first pin hole 3 is dispersed, the phenomenon of cracking, breaking and disconnection caused by stress concentration is prevented, and thus the service life of the loader arm is prolonged.

[0064] The embodiment of the utility model further provides a loader, which comprises the loader arm in the above embodiment.

[0065] In the embodiment of the utility model, the loader arm described above has the beneficial effects described above, which will not be repeated here.

[0066] The above specific implementation does not constitute a limitation on the protection scope of the utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A loader boom, characterized in that, The loader arm comprises: two oppositely arranged movable arm plates and a cross beam arranged between the two movable arm plates; wherein each movable arm plate is bent at a preset angle, and a first pin hole for fixing a movable arm hydraulic cylinder is arranged at the bent part of each movable arm plate, and a stress dispersion plate is arranged at the first pin hole of each movable arm plate.

2. The loader arm of claim 1, wherein, The stress dispersion plate is attached to the bent part of the movable arm plate.

3. The loader arm of claim 1, wherein, The stress dispersion plate is matched with the shape of the bent part of the movable arm plate, the stress dispersion plate comprises two opposite circular arc sides, and the two ends of the two circular arc sides are connected by a circular arc surface.

4. The loader arm of claim 3, wherein, The radius of one of the circular arc sides ranges from 150 mm to 200 mm.

5. The loader arm of claim 3, wherein, The radius of the other circular arc side ranges from 100 mm to 130 mm.

6. The loader arm of claim 1, wherein, Two ends of each movable arm plate are respectively provided with a second pin hole for fixing a bucket and a third pin hole for fixing a machine frame.

7. The loader arm of claim 6, wherein, The second pin hole of each movable arm plate is provided with the stress dispersion plate.

8. The loader arm of claim 6, wherein, The third pin hole of each movable arm plate is provided with the stress dispersion plate.

9. The loader arm of claim 1, wherein, Two symmetrical ear plates are arranged on the cross beam, and the ear plates are parallel to the movable arm plates.

10. A loader characterized by The loader arm comprises: the loader arm as claimed in any one of claims 1 to 9.

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