Lower H-shaped arm and suspension system

Abstract

The utility model relates to the technical field of suspension systems, in particular to a lower H-shaped arm and a suspension system. The lower H-shaped arm comprises a transverse arm and two longitudinal arms, the first ends of the longitudinal arms are used for being movably connected with a front frame, and the second ends of the longitudinal arms are used for being movably connected with steering knuckles. The two ends of the transverse arm are respectively connected with one longitudinal arm to form an H-shaped structure; the distance between the first end of each longitudinal arm and the transverse center line of the transverse arm is larger than the distance between the second end of each longitudinal arm and the transverse center line of the transverse arm. The distance between the first end of each longitudinal arm in the lower H-shaped arm and the transverse center line of the transverse arm is larger than the distance between the second end of each longitudinal arm and the transverse center line of the transverse arm, so that an open space between the first ends of the two longitudinal arms is enlarged, and enough space is provided for installation of a wheel drive and vertical swing around a front frame.

Description

TECHNICAL FIELD

[0001] The utility model relates to a suspension system technical field especially relates to a lower H shape arm and suspension system. BACKGROUND

[0002] The lower H shape arm is an important component part in the suspension system of the mine truck, and the structure is more complex, the connecting points are more, and the assembly precision of the suspension system is higher, therefore, the connecting structure of the lower H shape arm and the front frame needs to design the separate connecting seat, and the connecting seat is welded to the front frame through the tooling, so that the relative position of the connecting seat will change with the deformation of the front frame in the welding process, resulting in that the lower H shape arm does not have enough space to install the wheel edge drive, and resulting in that the lower H shape arm provides enough space for the up-down swing of the front frame. SUMMARY

[0003] The utility model aims at solving one of the technical problems in the prior art or related art.

[0004] Therefore, the utility model provides a lower H shape arm, which can increase the open space between the first ends of two longitudinal arms, and provide enough space for the installation of the wheel edge drive and the up-down swing around the front frame.

[0005] The utility model further provides a suspension system comprising the above lower H shape arm.

[0006] According to the lower H shape arm of the first aspect embodiment of the utility model, the lower H shape arm is applied to the suspension system, and comprises:

[0007] The longitudinal arm is used for being movably connected with the front frame at the first end and movably connected with the steering knuckle at the second end;

[0008] The transverse arm is movably connected with one longitudinal arm at each end, and forms an H-shaped structure;

[0009] The distance between the first end of each longitudinal arm and the transverse center line of the transverse arm is greater than the distance between the second end of each longitudinal arm and the transverse center line of the transverse arm.

[0010] Optionally, the first end of the longitudinal arm is provided with a first fixing lug, and the front frame is movably connected with the first fixing lug, so that the longitudinal arm and the front frame can rotate relative to each other;

[0011] The second end of the longitudinal arm is provided with a second fixing lug, and the steering knuckle is movably connected with the second fixing lug, so that the longitudinal arm can rotate towards or away from the plane where the steering knuckle is located with the second fixing lug as the center.

[0012] Optionally, the first fixing lug comprises:

[0013] The first lug plate is located at the first end of the longitudinal arm, and a first lug hole is formed in the first lug plate;

[0014] A second ear plate is arranged below the first ear hole and parallel to the first ear plate; a second ear hole is formed in the second ear plate, and the second ear hole is coaxially arranged with the first ear hole; and the front frame is movably connected between the first ear plate and the second ear plate through the first bearing and the first ear hole and the second ear hole.

[0015] Optionally, a boss is arranged on the side surface of the first ear plate away from the second ear plate; when the first bearing is installed on the first ear plate through the connecting plate pin shaft, the boss is used for fixedly connecting with the connecting plate on the connecting plate pin shaft.

[0016] Optionally, the second fixing ear comprises:

[0017] A third ear plate is arranged at the second end of the longitudinal arm; a third ear hole is formed in the third ear plate; and the third ear hole is used for installing the second bearing, so that the longitudinal arm is movably connected with the knuckle through the second bearing.

[0018] Optionally, a groove is formed in the inner wall of the third ear hole, and the groove is coaxial with the third ear hole; the groove is used for installing a snap spring for limiting the axial rotation angle of the second bearing.

[0019] Optionally, the lower H-shaped arm is an integrally formed structure formed by the cross arm and the two longitudinal arms.

[0020] Optionally, the cross arm and the two longitudinal arms are both made of cast steel 28NiMoA.

[0021] Optionally, the included angle between the longitudinal center line of the longitudinal arm and the transverse center line of the cross arm is 10°-20°.

[0022] According to the second aspect of the present application, a suspension system comprises the lower H-shaped arm of the first aspect or any of the embodiments.

[0023] The above technical solution has at least the following advantages or beneficial effects:

[0024] For the lower H-shaped arm of the present application, the distance between the first end of each longitudinal arm and the transverse center line of the cross arm is greater than the distance between the second end of the longitudinal arm and the transverse center line of the cross arm, so as to increase the open space between the first ends of the two longitudinal arms, and provide sufficient space for the installation of the wheel drive and the up-down swing around the front frame.

[0025] The suspension system provided by the present application has the lower H-shaped arm described above, and since the lower H-shaped arm has the above technical effects, the suspension system provided with the lower H-shaped arm should also have corresponding technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 Fig. 1 shows a structure schematic diagram of a lower H-shaped arm of one embodiment of the present application;

[0027] Fig. 2 A top view of a lower H-shaped arm of one embodiment provided by the present application is shown;

[0028] Fig. 3 A side view of a lower H-shaped arm of one embodiment provided by the present application is shown;

[0029] Fig. 4 A structure schematic diagram of a lower H-shaped arm connected with a front frame and a steering knuckle after one embodiment provided by the present application is shown.

[0030]

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 1, a cross arm;

[0032] 2, a longitudinal arm, 201, a first fixed ear, 202, a second fixed ear, 2011, a first ear plate, 2012, a second ear plate, 2013, a first ear hole, 2014, a second ear hole, 2015, a boss, 2021, a third ear plate, 2022, a third ear hole, 2023, a groove;

[0033] 3, a front frame, 301, a connecting plate;

[0034] 4, a steering knuckle, 401, a fourth ear plate, 402, a fifth ear plate;

[0035] 5, a first bearing;

[0036] 6, a connecting plate pin, 601, a connecting plate;

[0037] 7, a second bearing. DETAILED DESCRIPTION

[0038] In order to better explain the present application, so as to facilitate understanding, the present application is described in detail by specific embodiments in combination with the drawings.

[0039] When the underground coal transport vehicle is working, the independent suspension in the suspension system needs to transmit the traction, braking, steering, emergency stop and other working condition loads of the wheel edge driving system to the front frame for the working of the whole vehicle. At the same time, the independent suspension swings up and down around the front frame to provide support for the up and down movement of the suspension cylinder. Therefore, the independent suspension is a heavy component in the suspension system of the underground coal transport vehicle.

[0040] At present, the independent suspension used by commercial vehicles and part of mine vehicles is mostly upper and lower A-shaped arm structure. The upper and lower arms each have two connection points connected with the frame, and each has one connection point connected with the steering knuckle at the other end. The suspension cylinder shock absorber is connected with the front frame and the steering knuckle from the middle of the A-shaped arm to realize the steering control function of the front wheel. In order to ensure the suspension cylinder shock effect, these independent suspension systems need a larger installation height after meeting the requirement of the minimum length of the suspension cylinder, which cannot meet the low height use requirement of the underground coal transport vehicle.

[0041] Although part of the mine car will be the lower H-shaped arm as an independent suspension, can solve the A-shaped arm exists the above problems, but the lower H-shaped arm its structure is more complex, at present mostly for 2 arm sheet metal structure assembly, this sheet metal structure by forming process limit, can't be the lower H-shaped arm of integral molding, need to split the lower H-shaped arm into 2 arms, again through the bolt joint, therefore, the existing lower H-shaped arm can't meet the requirement of being able to bear the load capacity.

[0042] And because, independent suspension compared to traditional rigid bridge suspension structure is more complex, more connection points, the assembly precision of the suspension system is higher. Therefore, the connecting structure of the lower H-shaped arm and the front frame needs a separate connecting seat, which is welded to the frame by tooling. In this way, the relative position of the connecting seat will change during the welding process due to the deformation of the frame, affecting the assembly of the independent suspension.

[0043] In order to solve at least one of the technical problems existing in the prior art or related art, the utility model provides a lower H-shaped arm, the lower H-shaped arm includes a cross arm and two longitudinal arms, the first end of the longitudinal arm is used for being movably connected with the front frame, and the second end of the longitudinal arm is used for being movably connected with the steering knuckle; the two ends of the cross arm are connected with a longitudinal arm respectively, forming an H-shaped structure; wherein the distance between the first end of each longitudinal arm and the transverse center line of the cross arm is greater than the distance between the second end of each longitudinal arm and the transverse center line of the cross arm. The utility model increases the open space between the first ends of the two longitudinal arms by making the distance between the first end of each longitudinal arm and the transverse center line of the cross arm greater than the distance between the second end of each longitudinal arm and the transverse center line of the cross arm, so as to provide sufficient space for the installation of the wheel drive and the up-down swing around the front frame.

[0044] The lower H-shaped arm and the suspension system according to some embodiments provided by the utility model are described below with reference to the accompanying drawings.

[0045] Referring to Figs. 1 to 4 The utility model provides a lower H-shaped arm, which is applied to a suspension system. The lower H-shaped arm includes a cross arm 1 and two longitudinal arms 2. The first end of the longitudinal arm 2 is movably connected with the front frame 3, and the second end of the longitudinal arm 2 is movably connected with the steering knuckle 4. The two ends of the cross arm 1 are connected with a longitudinal arm 2 respectively, forming an H-shaped structure. The distance between the first end of each longitudinal arm 2 and the transverse center line of the cross arm 1 is greater than the distance between the second end of each longitudinal arm 2 and the transverse center line of the cross arm 1.

[0046] Here, the two longitudinal arms 2 are symmetrically arranged with the transverse center line of the cross arm 1 as the axis of symmetry.

[0047] It should be noted that, in order to ensure the installation precision between the front frame 3 and the longitudinal arm 2, the front frame 3 is prepared by using post-weld machining.

[0048] In the embodiment, by using the first end of the trailing arm 2 to movably connect with the front frame 3, and using the second end of the trailing arm 2 to movably connect with the knuckle 4, by realizing that the front frame 3 and the knuckle 4 are connected through the lower H-shaped arm, and converting the up-and-down jumping of the knuckle 4 into the up-and-down swinging of the lower H-shaped arm relative to the front frame 3; at the same time, by making the distance between the first end of each trailing arm 2 in the lower H-shaped arm and the transverse center line of the transverse arm 1 greater than the distance between the second end and the transverse center line of the transverse arm 1, the open space between the first ends of the two trailing arms 2 is increased, and enough space is provided for the installation of the wheel drive and the up-and-down swinging around the front frame 3.

[0049] In some possible implementation embodiments, the first end of the trailing arm 2 is provided with a first fixing lug 201, the front frame 3 is movably connected with the first fixing lug 201, so that the trailing arm 2 and the front frame 3 can rotate relative to each other; the second end of the trailing arm 2 is provided with a second fixing lug 202, and the knuckle 4 is movably connected with the second fixing lug 202, so that the trailing arm 2 can rotate towards or away from the plane where the knuckle 4 is located with the second fixing lug 202 as the center.

[0050] It should be noted that the first fixing lug 201 at the first end of the two trailing arms 2 is symmetrically arranged with the transverse center line of the transverse arm 1 as the axis of symmetry; the second fixing lug 202 at the second end of the two trailing arms 2 is symmetrically arranged with the transverse center line of the transverse arm 1 as the axis of symmetry.

[0051] Here, after the front frame 3 is movably connected with the first fixing lug 201, the trailing arm 2 and the front frame 3 can rotate relative to each other in a plane horizontal to the front frame 3.

[0052] In the embodiment, by arranging the first fixing lug 201 at the first end of the trailing arm 2 and the second fixing lug 202 at the second end of the trailing arm 2, the front frame 3 can be movably connected with the trailing arm 2 through the cooperation of the first fixing lug 201 and the first bearing 5, and the knuckle 4 can be movably connected with the trailing arm 2 through the cooperation of the second fixing lug 202 and the second bearing 7. Therefore, it can be seen that the design of the first fixing lug 201 and the second fixing lug 202 can realize the installation and connection between the lower H-shaped arm and the front frame 3 and the knuckle 4, and convert the up-and-down jumping of the knuckle 4 into the up-and-down swinging of the lower H-shaped arm relative to the front frame 3.

[0053] Further, the first fixed lug 201 comprises a first lug plate 2011 and a second lug plate 2012, the first lug plate 2011 is located at the first end of the longitudinal arm 2, and a first lug hole 2013 is formed in the first lug plate 2011; the second lug plate 2012 is located below the first lug hole 2013 and is arranged in parallel with the first lug plate 2011; a second lug hole 2014 is formed in the second lug plate 2012, and the second lug hole 2014 is coaxially arranged with the first lug hole 2013; the front frame 3 is movably connected between the first lug plate 2011 and the second lug plate 2012 through the first bearing 5 cooperating with the first lug hole 2013 and the second lug hole 2014.

[0054] Wherein, the planes where the first lug plate 2011 and the second lug plate 2012 are located are parallel to the plane where the front frame 3 is located; the cross sections of the first lug hole 2013 and the second lug hole 2014 are parallel to the upper surface of the front frame 3. The first bearing 5 can be a knuckle bearing.

[0055] It should be noted that the front frame 3 is provided with a connecting plate 301, and a connecting hole is formed in the connecting plate 301; when the front frame 3 is connected with the longitudinal arm 2, the connecting plate 301 is placed between the first lug plate 2011 and the second lug plate 2012; then the position of the connecting hole is adjusted so that the connecting hole is coaxial with the first lug hole 2013 and the second lug hole 2014; then the first bearing 5 passes through the second lug hole 2014, the connecting hole and the first lug hole 2013 in sequence; finally, the two ends of the first bearing 5 are connected to the first lug plate 2011 and the second lug plate 2012 respectively. Here, the first fixed lug 201 is movably connected with the front frame 3 through the cooperation between the first bearing 5 and the connecting hole.

[0056] In this embodiment, by selecting the parallel structure of the first lug plate 2011 and the second lug plate 2012 for the first fixed lug 201, the front frame 3 can be movably connected with the longitudinal arm 2 through the cooperation of the first fixed lug 201 and the first bearing 5, so that the longitudinal arm 2 and the front frame 3 can rotate relative to each other with the first bearing 5 as the center in the plane where the front frame 3 is located.

[0057] Further, a boss 2015 is arranged on the side surface of the first lug plate 2011 away from the second lug plate 2012; when the first bearing 5 is installed on the first lug plate 2011 through the connecting plate pin shaft 6, the boss 2015 is used for fixedly connecting with the connecting plate 601 on the connecting plate pin shaft 6.

[0058] Since the first bearing 5 is installed on the first lug plate 2011 and the second lug plate 2012 through the lug pin shaft 6, in order to avoid the lug 601 on the lug pin shaft 6 rotating with the first bearing 5, a boss 2015 is arranged on the side surface of the first lug plate 2011 away from the second lug plate 2012, and after the first end of the first bearing 5 is fixed on the first lug plate 2011 by the lug pin shaft 6, the lug 601 on the lug pin shaft 6 is fixedly connected with the boss 2015 on the first lug plate 2011 to limit the rotation of the lug 601 on the two lug pin shafts 6, so that the first bearing 5 can be stably installed on the first fixed lug 201.

[0059] Further, the second fixed lug 202 includes a third lug plate 2021 located at the second end of the longitudinal arm 2, and the third lug plate 2011 is provided with a third lug hole 2022 for installing the second bearing 7 to movably connect the longitudinal arm 2 with the knuckle 4 through the second bearing 7.

[0060] In this embodiment, the second bearing 7 can be a joint bearing.

[0061] It should be noted that the knuckle 4 is provided with a fourth lug plate 401 and a fifth lug plate 402 arranged oppositely, the fourth lug plate 401 is provided with a fourth lug hole, the fifth lug plate 402 is provided with a fifth lug hole, and the fourth lug hole and the fifth lug hole are coaxially arranged; when the knuckle 4 is connected with the longitudinal arm 2, the third lug plate 2021 is placed between the fourth lug plate 401 and the fifth lug plate 402; then the position of the third lug plate 2021 is adjusted to make the third lug hole 2022 coaxial with the fourth lug hole and the fifth lug hole; then the second bearing 7 passes through the fifth lug hole, the third lug hole 2022 and the fourth lug hole in sequence; finally, the two ends of the second bearing 7 are connected to the third lug plate 2021 and the fifth lug plate 402 respectively. Here, the second fixed lug 202 is movably connected with the knuckle 4 through the cooperation between the second bearing 7 and the third lug hole 2022.

[0062] In this embodiment, by selecting the structure of the third lug plate 2021 for the second fixed lug 202, the knuckle 4 can be movably connected with the longitudinal arm 2 through the cooperation between the second fixed lug 202 and the second bearing 7, so that the longitudinal arm 2 rotates towards or away from the plane where the knuckle 4 is located with the second bearing 7 on the second fixed lug 202 as the center.

[0063] Further, a groove 2023 is arranged on the inner wall of the third lug hole 2022, and the groove 2023 is coaxial with the third lug hole 2022; the groove 2023 is used for installing a circlip for limiting the axial rotation angle of the second bearing 7.

[0064] Since the second bearing 7 can rotate axially in the third ear hole 2022, but the angle of the lower H-shaped arm rotating with the second bearing 7 relative to the rotation angle of the knuckle 4 needs to be limited within a certain range, here, a groove 2023 coaxial with the third ear hole 2022 is formed on the inner wall of the third ear hole 2022, so that the axial rotation angle of the second bearing 7 can be limited by installing a snap spring in the groove 2023, that is, the axial rotation angle of the second bearing 7 in the third ear hole 2022 can be realized.

[0065] In some possible implementation embodiments, the lower H-shaped arm is an integrally formed structure formed by the transverse arm 1 and the two longitudinal arms 2.

[0066] Here, the lower H-shaped arm can be prepared by casting.

[0067] In the embodiment, by selecting the lower H-shaped arm as an integrally formed structure formed by the transverse arm 1 and the two longitudinal arms 2, not only the batch production of the lower H-shaped arm is facilitated, but also the mechanical properties and structural reliability of the lower H-shaped arm are ensured.

[0068] In some possible implementation embodiments, the transverse arm 1 and the two longitudinal arms 2 are both prepared from cast steel 28NiMoA.

[0069] Here, the material of the transverse arm 1 and the two longitudinal arms 2 is selected as cast steel 28NiMoA, which can ensure that the mechanical properties of the lower H-shaped arm composed of the transverse arm 1 and the two longitudinal arms 2 meet the strength and rigidity requirements of the vehicle under the working conditions of traction, braking, steering, emergency stop and the like.

[0070] In some possible implementation embodiments, the included angle between the longitudinal center line of the longitudinal arm 2 and the transverse center line of the transverse arm 1 is 10°-20°.

[0071] In the embodiment, by selecting the included angle between the longitudinal center line of the longitudinal arm 2 and the transverse center line of the transverse arm 1 as 10°-20°, the lower H-shaped arm can effectively bear the vertical impact, so that the lower H-shaped arm meets the strength requirements under the working conditions of extreme braking, extreme steering, steering braking downhill and the like.

[0072] One embodiment of the utility model discloses a suspension system, including the lower H-shaped arm in any of the above embodiment.

[0073] Since the coal truck of the embodiment includes any lower H-shaped arm in the first aspect, it has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0074] In the description of the utility model, it is necessary to understand that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0075] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0076] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature, can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature, can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is lower than that of the second feature.

[0077] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or features of the embodiments or examples described in the specification without contradiction.

[0078] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and those skilled in the art can modify, modify, replace and change the above embodiments within the scope of the utility model.

Claims

1. A lower H-arm for use in a suspension system, the lower H-arm comprising: include: The trailing arm has a first end for movably connecting to the front frame and a second end for movably connecting to the steering knuckle; A horizontal arm, with its two ends connected to one of the aforementioned vertical arms, forming an H-shaped structure; Wherein, the distance between the first end of each longitudinal arm and the transverse centerline of the transverse arm is greater than the distance between its second end and the transverse centerline of the transverse arm.

2. The under H-arm of claim 1, wherein, The first end of the trailing arm is provided with a first fixed lug, and the front frame is movably connected to the first fixed lug so that the trailing arm and the front frame can rotate relative to each other; The second end of the longitudinal arm is provided with a second fixed lug, and the steering knuckle is movably connected to the second fixed lug, so that the longitudinal arm can rotate towards or away from the plane where the steering knuckle is located with the second fixed lug as the center.

3. The lower H-arm of claim 2, wherein, The first fixing ear includes: A first ear plate is located at the first end of the longitudinal arm, and a first ear hole is provided on the first ear plate; The second ear plate is located below the first ear hole and is arranged parallel to the first ear plate; the second ear plate has a second ear hole, which is coaxial with the first ear hole; the front frame is movably connected between the first ear plate and the second ear plate through a first bearing and the first ear hole and the second ear hole.

4. The lower H-arm of claim 3, wherein, The first ear plate has a boss on the side away from the second ear plate; when the first bearing is mounted on the first ear plate by a connecting plate pin, the boss is used to fix it to the connecting plate on the connecting plate pin.

5. The under H-arm of claim 2, wherein, The second fixing ear includes: A third ear plate is located at the second end of the longitudinal arm; a third ear hole is provided on the third ear plate; the third ear hole is used to install a second bearing so that the longitudinal arm is movably connected to the steering knuckle through the second bearing.

6. The under H-arm of claim 5, wherein, A groove is provided on the inner wall of the third ear hole, and the groove is coaxial with the third ear hole; the groove is used to install a retaining ring that limits the axial rotation angle of the second bearing.

7. The under H-arm of claim 1, wherein, The lower H-shaped arm is an integrally formed structure of the horizontal arm and the two vertical arms.

8. The under H-arm of claim 1, wherein, The transverse arm and the two longitudinal arms are both made of cast steel 28NiMoA.

9. The under H-arm according to any one of claims 1 to 8, characterized in that, The angle between the longitudinal centerline of the longitudinal arm and the transverse centerline of the transverse arm is 10°~20°.

10. A suspension system characterized by, Includes the lower H-shaped arm as described in any one of claims 1 to 9.

Images