Combined support for heavy truck chassis

Abstract

The utility model relates to the technical field of truck chassis supports, and discloses a combined support for a heavy truck chassis, which comprises a chassis and four support shells welded at the bottom of the chassis, and further comprises lifting lugs arranged in inner cavities of the support shells, screw rods are arranged in inner cavities of the lifting lugs, and the surfaces of the screw rods are in threaded connection with nuts; under the cooperation of the two-way threaded rod and the telescopic mechanism, the four protective shells can be close to the direction of the supporting shell synchronously, shielding protection can be provided for the two sides of the plate spring, the plate spring is effectively prevented from being directly impacted and damaged by splashed broken stones, and therefore the service life of the plate spring can be greatly prolonged, and the service life of the plate spring is prolonged. And meanwhile, under the cooperation of the auxiliary mechanism and the chassis, a worker can conveniently rotate and limit the two-way threaded rod, the two-way threaded rod can provide reliable power input for operation of the telescopic mechanism, and the practicability of the device is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of truck chassis brackets, in particular to a combined bracket for a heavy truck chassis. Background Art

[0002] Heavy trucks are freight vehicles with a large load capacity. They are often used in long-distance freight, construction sites and other occasions where large quantities of goods need to be moved. The brackets of the truck chassis are structures used to support and connect various important components on the chassis, such as engine brackets, leaf spring brackets, etc.

[0003] When heavy trucks are driving on roads with harsh road conditions such as construction sites and mines, their tires can easily squeeze and splash debris such as gravel and mud on the road. Since the leaf springs of the trucks are completely exposed between the chassis and the road, and the distance between the chassis and the ground will be lower after the truck is loaded with heavy objects, it is easy for the leaf springs to be squeezed and directly hit by the splashing gravel, mud and other foreign objects. The leaf springs are frequently subjected to the impact of external forces, which will greatly accelerate their aging and deformation and may even directly cause damage, severely shortening their service life, which not only increases maintenance costs but also affects the driving safety of the entire vehicle. Utility Model Content

[0004] The purpose of the utility model is to provide a combined bracket for a heavy truck chassis to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a combined bracket for a heavy truck chassis, comprising a chassis and four support shells welded at the bottom thereof, and also comprising:

[0006] A lifting lug is arranged in the inner cavity of the supporting shell, a screw is arranged in the inner cavity of the lifting lug, a nut is threadedly connected to the surface of the screw, and a protective shell is arranged below the supporting shell, and the number of the protective shells is four and they are symmetrically distributed;

[0007] Slide rails welded to the bottom of the chassis and located on both sides of the support shell, and slide grooves are provided on both sides of the inner wall of the protective shell, and the slide grooves are slidably connected to the surface of the slide rails;

[0008] A bidirectional threaded rod is rotatably connected to the inner wall of the chassis, the other end of the bidirectional threaded rod penetrates the outer side of the chassis and is rotatably connected to the penetration point, and a telescopic mechanism used in conjunction with the protective shell is provided on the surface of the bidirectional threaded rod;

[0009] An auxiliary mechanism used to provide rotation and limiting for a bidirectional threaded rod.

[0010] Preferably, the telescopic mechanism includes a first slider threadedly connected to one side of the surface of the bidirectional threaded rod and a first support rod rotatably connected to the bottom of the first slider, a second slider is threadedly connected to the other side of the surface of the bidirectional threaded rod, a second support rod is rotatably connected to the bottom of the second slider, the number of the second support rod and the first support rod are both two, the second support rod and the first support rod are symmetrically distributed on both sides of the bidirectional threaded rod, a connecting column is rotatably connected to the intersection of one end of the second support rod and one end of the first support rod, the bottom end of the connecting column is fixedly connected to a cross rod, and the two ends of the cross rod are respectively bolted to the protective shells on both sides.

[0011] Preferably, the auxiliary mechanism includes an active cavity opened on one side of the bidirectional threaded rod and a sliding rod arranged on one side of the inner cavity of the active cavity, one end of the sliding rod is fixedly connected to a limiting plate, the limiting plate is slidably connected to the inner wall of the active cavity, the other end of the sliding rod passes through the outer side of the bidirectional threaded rod and is slidably connected to the inner wall of the active cavity, the other end of the sliding rod is fixedly connected to a handwheel, one side of the handwheel is fixedly connected to a limiting column, a limiting hole is opened on one side of the chassis longitudinal beam, the limiting hole is used in conjunction with the limiting column, the number of the limiting holes is several, and the several limiting holes are distributed in a circular array at the center of the bidirectional threaded rod, a tension spring is fixedly connected to one side of the inner wall of the active cavity, and one end of the tension spring is fixedly connected to one side of the limiting plate.

[0012] Preferably, the cross-sectional shape of the slide rail is trapezoidal, and the surface shapes of the slide groove and the slide rail are adapted to each other.

[0013] Preferably, the movable cavity is in the shape of a rectangular parallelepiped, the limiting plate and the movable cavity are adapted to each other, and the cross-sectional shape of the sliding rod is rectangular.

[0014] Preferably, both sides of the inner wall of the protective shell are bolted with card slot seats.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model can make the four protective shells approach to the supporting shell synchronously through the cooperation of the two-way threaded rod and the telescopic mechanism, so as to provide a shielding and protection effect for both sides of the leaf spring, and effectively prevent the leaf spring from being damaged by direct impact of flying gravel, thereby greatly extending the service life of the leaf spring, reducing the cost of maintenance, and further improving the driving stability and safety of the truck. At the same time, through the cooperation of the auxiliary mechanism and the chassis, the staff can conveniently perform rotation and limit operations on the two-way threaded rod, so that the two-way threaded rod can provide reliable power input for the operation of the telescopic mechanism, thereby further enhancing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the protective shell in the utility model;

[0019] Figure 3 It is a schematic diagram of the expanded structure of the support shell, the lifting lug and the screw rod in the utility model;

[0020] Figure 4 It is a schematic diagram of a partial expanded structure in the utility model;

[0021] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the bidirectional screw in the utility model.

[0022] In the figure: 1. chassis; 2. support shell; 3. lifting ear; 4. screw; 5. protective shell; 6. slide rail; 7. slide groove; 8. telescopic mechanism; 81. first slider; 82. first support rod; 83. second slider; 84. second support rod; 85. connecting column; 86. cross bar; 9. auxiliary mechanism; 91. movable cavity; 92. slide rod; 93. limit plate; 94. hand wheel; 95. tension spring; 96. limit column; 97. limit hole; 10. slot seat; 11. bidirectional threaded rod; 12. nut. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5As shown, a combined bracket for a heavy truck chassis includes a chassis 1 and four support shells 2. The chassis 1 includes two longitudinal beams and a plurality of cross beams welded between the longitudinal beams. The chassis 1 can carry a vehicle body, an engine and other important components. The four support shells 2 are welded to the bottom of the middle longitudinal beam on both sides of the chassis 1. The four support shells 2 are symmetrically distributed at the bottom of the chassis 1. The inner cavity of the support shell 2 is provided with a lifting ear 3. The inner cavity of the lifting ear 3 is provided with a screw 4. Both ends of the screw 4 penetrate to the outer side of the lifting ear 3 and the support shell 2 and are slidably connected with their penetration points. The surface of the screw 4 is threadedly connected with a nut 12. With the cooperation of the four groups of support shells 2, the lifting ear 3, the screw 4 and the nut 12, the two ends of the two groups of leaf springs of the truck can be effectively connected, so that the two groups of leaf springs can be connected. The spring provides a stable suspension support effect for the chassis 1. A protective shell 5 is arranged below the support shell 2. There are four protective shells 5 and they are symmetrically distributed. Slide rails 6 are welded at the bottom of the longitudinal beam of the chassis 1 and on both sides of the support shell 2. Slide grooves 7 are provided on both sides of the inner wall of the protective shell 5. The cross-sectional shape of the slide rail 6 is trapezoidal. The shapes of the slide groove 7 and the slide rail 6 are adapted to each other. The slide rail 6 is slidably connected to the inner wall of the slide groove 7, which can provide precise guide for the movement of the protective shell 5. A bidirectional threaded rod 11 is arranged between the longitudinal beams of the chassis 1. One end of the bidirectional threaded rod 11 is rotatably connected to the inner wall of the longitudinal beam of the chassis 1 through a bearing seat, and the other end of the bidirectional threaded rod 11 penetrates to the outer side of the longitudinal beam of the chassis 1 and is rotatably connected to the penetration point thereof. A telescopic mechanism 8 is arranged on the surface, and the telescopic mechanism 8 is used in conjunction with the protective shell 5. When the bidirectional threaded rod 11 rotates, the telescopic mechanism 8 can drive the slide groove 7 on the inner wall of the protective shell 5 to slide along the surface of the slide rail 6, so that the four protective shells 5 can be synchronously approached or synchronously moved away from each other. When the protective shells 5 on both sides move synchronously toward the direction of the supporting shell 2, the supporting shell 2 and both sides of the leaf spring can be shielded and protected. When the truck is driving, it can effectively block the impact damage to the leaf spring caused by external debris such as gravel, and can greatly extend the service life of the leaf spring, thereby improving the maintenance cycle of the whole vehicle and improving driving safety. Both sides of the inner wall of the protective shell 5 are bolted with a slot seat 10, and the surface of the slot seat 10 is provided with grooves. The slot seats 10 on both sides are respectively connected to The screw rod 4 and the nut 12 are used together. When the protective shells 5 on both sides move toward each other to protect the support shell 2 and the leaf spring, the two card slot seats 10 can be driven to move synchronously, so that their grooves are respectively engaged with the hexagonal heads of the nut 12 and the screw rod 4 to limit the position, which can prevent the threaded connection between the screw rod 4 and the nut 12 from loosening, thereby ensuring the reliability and stability of the leaf spring suspension system and reducing the maintenance cost during long-term use. When the two-way threaded rod 11 is rotated in the opposite direction, the telescopic mechanism 8 can drive the four protective shells 5 to move synchronously in pairs away from the support shell 2, so that the protective shell 5 can release the shielding protection of the leaf spring until the support shell 2 is exposed, so that the staff can disassemble and replace the two ends of the leaf spring and the lifting ears 3 and the screw 4.The end of the bidirectional threaded rod 11 that passes through the outside of the chassis 1 is provided with an auxiliary mechanism 9, which can facilitate the staff to rotate the bidirectional threaded rod 11, and can also limit the position of the bidirectional threaded rod 11 after it is rotated to prevent the bidirectional threaded rod 11 from rotating unexpectedly, thereby improving the stability of the protection of the leaf spring by the telescopic mechanism 8 driving the protective shell 5 to move.

[0025] The telescopic mechanism 8 includes a first slider 81, which is threadedly connected to one side of the surface of the bidirectional threaded rod 11, and the bottom of the first slider 81 is rotatably connected to a first support rod 82 through a coupling. The first support rod 82 is designed to be inclined, and the number of the first support rod 82 is two, and they are symmetrically distributed on both sides of the bidirectional threaded rod 11. The other side of the surface of the bidirectional threaded rod 11 is threadedly connected to a second slider 83, and the bottom of the second slider 83 is rotatably connected to a second support rod 84 through a coupling. The second support rod 84 is designed to be inclined, and the number of the second support rod 84 is two, and they are symmetrically distributed on both sides of the bidirectional threaded rod 11. One end of the second support rod 84 is staggered with one end of the first support rod 82, and the second support rod 84 and the first support rod 82 are arranged together. A connecting column 85 is provided above the end, and the bottom end of the connecting column 85 passes through the bottom of the second support rod 84 and the first support rod 82 and is rotatably connected to the penetration point thereof, and a cross bar 86 is fixedly connected to the bottom end of the connecting column 85, and both ends of the cross bar 86 are bolted to the surface of the protective shell 5 on both sides. When the two-way threaded rod 11 is driven to rotate by the auxiliary mechanism 9, under the connection restriction of the first support rod 82, the second support rod 84, the connecting column 85 and the cross bar 86, the first slider 81 and the second slider 83 can be prevented from rotating synchronously with the two-way threaded rod 11, but the first slider 81 and the second slider 83 can be synchronously moved toward or away from each other on the surface of the two-way threaded rod 11. When the first slider 81 and the first support rod 82 are on the two-way threaded rod 11, the first slider 81 and the second slider 83 can be synchronously moved toward or away from each other on the surface of the two-way threaded rod 11. When the surfaces move in opposite directions, they can respectively drive one end of the first support rod 82 and the second support rod 84 to move synchronously away from each other along the surface of the two-way threaded rod 11, and the connecting column 85 is rotatably connected to them, so that the angle between the staggered ends of the first support rod 82 and the second support rod 84 can be enlarged, so that the staggered ends of the first support rod 82 and the second support rod 84 and the connecting column 85 can move closer to the two-way threaded rod 11, so that the connecting column 85 can drive the protective shells 5 on both sides to move synchronously toward the support shell 2 through the cross bar 86, and the slide groove 7 in the protective shell 5 will move along the surface of the slide rail 6, so that the protective shell 5 can form an effective barrier shielding effect on both sides of the support shell 2 and the leaf spring, which can effectively block the flying debris in the external environment. , mud and other impact objects to prevent them from directly colliding with the leaf spring and causing damage to it, which not only greatly extends the service life of the leaf spring, but also improves the maintenance cycle of the whole vehicle. The truck can be used continuously and safely without frequent maintenance of the leaf spring, thereby improving the driving safety of the whole vehicle. When the leaf spring needs to be disassembled, assembled or replaced, the bidirectional threaded rod 11 can be rotated in the opposite direction through the auxiliary mechanism 9, so that the first slider 81 and the second slider 83 can be synchronously approached, and the angle of the staggered end of the first support rod 82 and the second support rod 84 can be reduced, so that the connecting column 85 drives the protective shells 5 on both sides through the cross bar 86 to move synchronously in the direction away from the supporting shell 2, so that the protective shell 5 will not connect or disassemble the leaf spring with the lifting ear 3 and the screw 4.

[0026] The auxiliary mechanism 9 includes an active cavity 91, which is located on one side of the inside of the two-way threaded rod 11. The shape of the active cavity 91 is a rectangular parallelepiped design. A sliding rod 92 is provided on one side of the inner cavity of the active cavity 91. One end of the sliding rod 92 is fixedly connected to a limiting plate 93. The cross-sectional shape of the sliding rod 92 is rectangular, which can not only ensure that the sliding rod 92 moves along a straight line, but also has high bending and torsion strength. The limiting plate 93 is adapted to the shape of the active cavity 91 and is slidably connected to its inner wall. The other end of the sliding rod 92 passes through the outer side of the two-way threaded rod 11 and is slidably connected to its inner wall. The limiting plate 93 can prevent the sliding rod 92 from detaching from the active cavity 91. The other end of the sliding rod 92 is fixedly connected to a handwheel 94. The operator can rotate the handwheel 94 in the forward and reverse directions. Under the restriction of the shapes of the active cavity 91, the sliding rod 92 and the limiting plate 93, the two-way threaded rod 11 can be driven to rotate synchronously in the forward and reverse directions. The handwheel The limiting column 96 is fixedly connected to one side of the two-way threaded rod 11 near 94, and a limiting hole 97 is provided on one side of the longitudinal beam of the chassis 1. The limiting hole 97 is used in conjunction with the limiting column 96. The number of limiting holes 97 is several, and the center of the two-way threaded rod 11 is distributed in a circular array. By pushing the hand wheel 94 to insert the limiting column 96 into the limiting hole 97, the hand wheel 94 can be provided with a limiting locking effect, which can prevent the two-way threaded rod 11 from accidentally rotating. A tension spring 95 is fixedly connected to the other side of the inner wall of the movable cavity 91, and the other end of the tension spring 95 is fixedly connected to one side of the limiting plate 93. Under the elastic tension of the tension spring 95, the limiting plate 93 and the sliding rod 92 can be prevented from sliding easily in the inner cavity of the movable cavity 91, thereby preventing the hand wheel 94 from driving the limiting column 96 to accidentally disengage from the limiting hole 97, thereby improving the stability of the limiting locking of the two-way threaded rod 11.

[0027] Working principle: When it is necessary to protect both sides of the leaf spring, first pull the hand wheel 94 to drive the limiting column 96 to disengage from the inner wall of the limiting hole 97, so as to release the limiting effect on the bidirectional threaded rod 11. At the same time, the moving hand wheel 94 will drive the sliding rod 92 and the limiting plate 93 to slide in the movable cavity 91, and the limiting plate 93 will pull the tension spring 95 to extend. Then, turn the hand wheel 94 to drive the bidirectional threaded rod 11 to rotate through the sliding rod 92 and the limiting plate 93, so that the first sliding block 81 and the first support rod 82 respectively drive the first support rod 82 and the second support rod 84 to move synchronously away from each other along the surface of the bidirectional threaded rod 11, so that the other end of the staggered first support rod 82 and the second support rod 84 and the connecting column 85 can move closer to the direction of the bidirectional threaded rod 11, so that the connecting column 85 can pass through the cross bar 86 It drives the protective shells 5 on both sides to move synchronously to the two sides of the supporting shell 2 and the leaf spring. At this time, the slide groove 7 in the protective shell 5 will move along the slide rail 6, so that the protective shell 5 can shield and protect the supporting shell 2 and the leaf spring on both sides, and can prevent the impact of gravel on the leaf spring and cause damage, thereby improving the driving safety of the truck. At the same time, the slot seats 10 on both sides of the inner wall of the protective shell 5 can respectively clamp the hexagonal heads of the nut 12 and the screw 4, which can effectively prevent the screw 4 and the nut 12 from loosening and falling off, thereby ensuring the reliability of the leaf spring connection. Finally, the limit column 96 is inserted into the inner wall of the limit hole 97, which can limit the rotation of the bidirectional threaded rod 11, and under the elastic tension of the tension spring 95, the stability of the connection between the limit column 96 and the limit hole 97 can be improved.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined support for a heavy truck chassis, comprising a chassis (1) and four support shells (2) welded to the bottom thereof, characterized in that: Also includes: A lifting ear (3) is arranged in the inner cavity of the supporting shell (2), a screw (4) is arranged in the inner cavity of the lifting ear (3), a nut (12) is threadedly connected to the surface of the screw (4), and a protective shell (5) is arranged below the supporting shell (2), and the number of the protective shells (5) is four and they are symmetrically distributed; A slide rail (6) welded to the bottom of the chassis (1) and located on both sides of the support shell (2), and slide grooves (7) are provided on both sides of the inner wall of the protective shell (5), and the slide grooves (7) are slidably connected to the surface of the slide rail (6); A bidirectional threaded rod (11) is rotatably connected to the inner wall of the chassis (1), the other end of the bidirectional threaded rod (11) penetrates the outer side of the chassis (1) and is rotatably connected to the penetration point, and a telescopic mechanism (8) used in conjunction with the protective shell (5) is provided on the surface of the bidirectional threaded rod (11); An auxiliary mechanism (9) is used for providing rotation and position limiting for a bidirectional threaded rod (11).

2. The combined bracket for a heavy truck chassis according to claim 1, characterized in that: The telescopic mechanism (8) comprises a first slider (81) threadedly connected to one side of the surface of the bidirectional threaded rod (11) and a first support rod (82) rotatably connected to the bottom of the first slider (81); a second slider (83) threadedly connected to the other side of the surface of the bidirectional threaded rod (11); a second support rod (84) rotatably connected to the bottom of the second slider (83); the number of the second support rod (84) and the first support rod (82) are both two; the second support rod (84) and the first support rod (82) are symmetrically distributed on both sides of the bidirectional threaded rod (11); a connecting column (85) is rotatably connected to the intersection of one end of the second support rod (84) and one end of the first support rod (82); the bottom end of the connecting column (85) is fixedly connected to a cross bar (86); the two ends of the cross bar (86) are respectively bolted to the protective shells (5) on both sides.

3. The combined bracket for a heavy truck chassis according to claim 1, characterized in that: The auxiliary mechanism (9) comprises an active cavity (91) provided on one side of the inner cavity of the bidirectional threaded rod (11) and a sliding rod (92) provided on one side of the inner cavity of the active cavity (91); one end of the sliding rod (92) is fixedly connected to a limiting plate (93); the limiting plate (93) is slidably connected to the inner wall of the active cavity (91); the other end of the sliding rod (92) passes through the outer side of the bidirectional threaded rod (11) and is slidably connected to the inner wall thereof; the other end of the sliding rod (92) is fixedly connected to a hand wheel (94); the hand wheel (94) is fixedly connected to the inner wall of the bidirectional threaded rod (11). One side of the wheel (94) is fixedly connected to a limiting column (96), one side of the longitudinal beam of the chassis (1) is provided with a limiting hole (97), the limiting hole (97) is used in conjunction with the limiting column (96), the number of the limiting holes (97) is several, and the several limiting holes (97) are distributed in a ring array at the center of the bidirectional threaded rod (11), one side of the inner wall of the movable cavity (91) is fixedly connected to a tension spring (95), and one end of the tension spring (95) is fixedly connected to one side of the limiting plate (93).

4. The combined bracket for a heavy truck chassis according to claim 1, characterized in that: The cross-sectional shape of the slide rail (6) is a trapezoid, and the inner wall of the slide groove (7) and the surface shape of the slide rail (6) are mutually adapted.

5. The combined bracket for a heavy truck chassis according to claim 3, characterized in that: The shape of the movable cavity (91) is a rectangular parallelepiped design, the shape of the limiting plate (93) and the shape of the movable cavity (91) are mutually adapted, and the cross-sectional shape of the sliding rod (92) is a rectangle.

6. The combined bracket for a heavy truck chassis according to claim 1, characterized in that: Both sides of the inner wall of the protective shell (5) are bolted with card slot seats (10).

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