CN212447821U - Cab rear suspension - Google Patents

Abstract

The utility model discloses a cab rear suspension, which comprises a beam assembly and two groups of rear suspension assemblies arranged at two ends of the beam assembly, wherein each rear suspension assembly comprises an upper lock body assembly, a hydraulic lock, a swing arm welding assembly, a rear suspension connecting bracket, a rear suspension air spring assembly and two lower supports; one end of the upper lock body assembly is connected with the cab; the other end of the upper lock body assembly is provided with a lock bolt rubber bushing, the whole outer framework of the lock bolt rubber bushing adopts a butterfly wing type structure, two sides of the outer framework are inwards inclined conical surfaces, and the swing arm welding assembly comprises a swing arm welding assembly A end and a swing arm welding assembly B end; the rear suspension connecting bracket comprises a rear suspension connecting bracket A end and a rear suspension connecting bracket B end. The utility model avoids the collision between the upper lock body assembly connected on the cab and the hydraulic lock; the butterfly wing type bolt rubber bushing can be reset after the displacement along the driving direction of the cab occurs, and the rear suspension can be kept at the initial installation position without front and rear inclination.

Description

Cab rear suspension

Technical Field

The utility model relates to a lorry technical field, a suspension behind driver's cabin specifically says so.

Background

With the improvement of the social living standard and the improvement of the domestic traffic environment, the requirement of people on the comfort of the lorry is higher and higher. The rear end of the truck cab is provided with the cab rear suspension which is connected with the cab and the frame, so that the vertical displacement of the cab can be buffered.

Among the prior art, the driver's cabin rear suspension generally includes crossbeam assembly, two sets of rear suspension assemblies that crossbeam assembly both ends symmetry set up. The two groups of rear suspension assemblies comprise an upper lock body, a hydraulic lock, a rear suspension swing arm, an air spring shock absorber, a rear suspension connecting support and a lower support. Usually, the lock bolt part of the upper lock body matched with the hydraulic lock is a pure metal pin shaft, the upper lock body is connected with a cab, the lower support is connected with a frame, and the upper lock body, the hydraulic lock, the A end of the rear suspension swing arm, the rear suspension air spring shock absorber, the A end of the rear suspension connecting support and the lower support are sequentially connected. Usually, the rear overhang swing arm B end links to each other with rear overhang linking bridge B end, and rear overhang swing arm B end is equipped with the sleeve, is equipped with swing arm rubber bush in the sleeve, and the bolt passes rear overhang linking bridge B end and swing arm rubber bush hole and makes swing arm rubber bush articulate on rear overhang linking bridge, and it is fixed through the nut after, makes the rear overhang swing arm can revolute the axis of rotation and rotate. The A end of the rear suspension connecting bracket is connected with the air spring shock absorber and the lower support, and the B end of the rear suspension connecting bracket is connected with the cross beam assembly.

The existing cab rear suspension is characterized in that an upper lock body is connected with a cab in the up-and-down moving process of the cab, the upper lock body is caused to move up and down, the lock body is connected with a hydraulic lock in the closed state of the hydraulic lock, the upper lock body jumps up and down to drive the hydraulic lock to jump up and down, the hydraulic lock is fixed on a rear suspension swing arm through a bolt, the rear suspension swing arm can rotate around a B-end rotating shaft, the hydraulic lock jumps up and down to drive the swing arm to rotate around the rotating shaft, the rear suspension swing arm is connected with an air spring shock absorber, the air spring shock absorber plays a role in buffering and damping, the up-and-down. When the back overhang swing arm revolved the axis of rotation and rotated, drive both sides hydraulic lock and shorten along crossbeam direction distance, because the body of locking that links to each other with the hydraulic lock is fixed, lead to the hydraulic lock from this and lock the wearing and tearing of body round pin axle to the buffering effect of influence back overhang leads to the travelling comfort to reduce.

The lock bolt of the lock body on the existing cab suspension rear suspension is generally made of pure metal materials, abnormal sound is easily generated when the cab is displaced up and down, and meanwhile, the whole rear suspension can be driven to incline forwards and backwards when the cab is frequently displaced along the linear running direction, so that the reliability and the comfort of the whole cab are influenced.

The existing cab rear suspension is generally set according to a certain fixed frame parameter, and cannot be used universally due to the fact that the center distance of lower supports on two sides cannot be changed when the whole vehicle is light in weight or switched to a vehicle type with different frames on the same platform, the redevelopment period is long, and extra time and extra cost are needed for verification.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a suspension and lorry behind driver's cabin to alleviate among the prior art driver's cabin reciprocating in-process, the body round pin axle and the hydraulic lock wearing and tearing of locking that lead to, the back suspension abnormal sound, the driver's cabin travelling comfort is poor, and can not satisfy the problem of the platformization use of different frame widths such as ordinary and lightweight. The utility model discloses the direction of definition and car straight line travel parallel is vertical, and is horizontal with the parallel direction of crossbeam assembly.

The utility model provides a cab rear suspension, which comprises a beam assembly and two groups of rear suspension assemblies arranged at two ends of the beam assembly, wherein the rear suspension assemblies comprise an upper lock body assembly, a hydraulic lock, a swing arm welding assembly, a rear suspension connecting bracket, a rear suspension air spring assembly and two lower supports; the upper lock body assembly is connected with a cab, and the lower support is connected with a frame;

the swing arm welding assembly comprises an A end and a B end; the rear suspension connecting bracket comprises an A end and a B end; the upper lock body assembly, the hydraulic lock, the end A of the swing arm welding assembly, the rear suspension air spring assembly, the end A of the rear suspension connecting support and the lower support are sequentially connected;

the B end of the swing arm welding assembly is connected with the B end of the rear suspension connecting support; and the B end of the rear suspension connecting bracket is connected with the beam assembly. The B end of the swing arm welding assembly is provided with a sleeve, a swing arm rubber bushing is arranged in the sleeve, the swing arm rubber bushing is pressed into the sleeve through press fitting, and the swing arm rubber bushing penetrates through a center hole of an inner framework of the bushing to be connected with the rear suspension connecting support through a bolt to realize rotation around a shaft.

One end of the upper lock body assembly is connected with the cab; the other end of the upper lock body assembly is provided with a lock bolt rubber bushing, the whole outer framework of the lock bolt rubber bushing adopts a butterfly wing type structure, and two sides of the lock bolt rubber bushing form inward-inclined conical surfaces;

the lower support comprises two different sizes, the two lower supports comprise an end A and an end B, the end A of the two lower supports is connected with the rear suspension air spring, the end A of the two lower supports are the same, the end B of the two lower supports are different, and the two lower supports can be selectively connected with the frames with two different widths.

Further, swing arm welding assembly is arranged in the rear overhang connecting support groove, and swing arm rubber bush inner frame axial length equals rear overhang connecting support groove width.

Further, the number of swing arm rubber bushings at the rear portion is two, the swing arm rubber bushings are pressed in from two sides respectively, and the axial length of an inner framework of the swing arm rubber bushing is larger than that of the sleeve.

Furthermore, the swing arm rubber bushing is provided with a crescent hole along the connecting line direction of the hydraulic locks on the two sides, and the axis of the crescent hole is superposed with the axis of the swing arm rubber bushing.

Further, swing arm rubber bushing includes inner frame, outer frame and rubber part, the inner frame is arranged in outer frame inboardly, the inner frame is as an organic whole through the rubber vulcanization, the inner frame both ends all are good at outer frame both ends.

Further, the upper lock body assembly comprises 1 lock bolt support, 1 bolt and 1 lock bolt rubber bushing, and the lock bolt support comprises an upper U-shaped plate and a lower U-shaped plate; the axial length of the lock bolt rubber bushing is the same as the size of the lower U-shaped plate opening, and the lock bolt rubber bushing is arranged on the inner side of the lower U-shaped plate opening and passes through an inner hole of the lock bolt rubber bushing and is fixed with the lower U-shaped plate through a bolt; reinforcing ribs are arranged on the inner sides of the grooves of the lower U-shaped plates; for reinforcing the strength of the bolt carrier. The set bar rubber bushing includes exoskeleton, inner frame and rubber part, the inner frame is arranged in the exoskeleton is inboard, the inner frame and the outer frame vulcanize as an organic whole through rubber, inner frame axial length is greater than exoskeleton axial length, the inner frame both ends all are good at exoskeleton both ends, fixing bolt arranges in the inner frame is epaxial.

Furthermore, the rear suspension connecting bracket is composed of two side plates and a bottom plate, the two side plates are respectively erected on two sides of the bottom plate, and the bottom plate and the side plates form a groove; the beam assembly comprises two side plates and a bottom plate, the two side plates are respectively erected on two sides of the bottom plate to form a groove, reinforcing ribs are arranged on the inner sides of the grooves, and through holes are formed in the middle of the reinforcing ribs and used for penetrating through hydraulic lock connecting wires.

Furthermore, the cab rear suspension also comprises a altitude valve assembly, an altitude valve upper bracket and an altitude valve lower bracket; the altitude valve assembly is arranged on the side part of the rear suspension connecting bracket and is fixed with the rear suspension connecting bracket through an altitude valve lower bracket, and the altitude valve upper bracket is arranged at the joint of the rear suspension air spring assembly and the swing arm welding assembly; the altitude valve assembly and the altitude valve upper bracket are connected and used for controlling the vertical height of the cab;

in the process of moving the cab up and down, the swing arm welding assembly rotates by taking the bolt rotating shaft as the center. In the direction parallel along the crossbeam, swing arm welding assembly produces a displacement volume, through using the swing arm rubber bush of taking both sides crescent hole, has increased the displacement volume of bush along crossbeam parallel direction, has released the relative displacement volume between bolt axis of rotation and the swing arm welding assembly, has reduced the wearing and tearing of hydraulic pressure lock and the wearing and tearing of locking the body lock plunger, has improved the travelling comfort of driver's cabin.

The upper lock body assembly and the hydraulic lock are connected through a lock bolt rubber bushing, the lock bolt rubber bushing comprises an outer framework, an inner framework and a rubber part, the inner framework is arranged on the inner side of the outer framework, and the inner framework and the outer framework are vulcanized into a whole through rubber. The set bar rubber bush passes through the bolt fastening in last lock body assembly, and the vibration of back overhang is transmitted by the hydraulic pressure lock behind the lock sleeve exoskeleton, has cushioned the vibration that exoskeleton transmitted to the inner frame through the rubber between the inside and outside skeleton, has avoided the production of abnormal sound. The outer framework of the lock bolt rubber bushing is of a butterfly wing type structure, two sides of the outer framework are inwards inclined conical surfaces, and the conical surfaces of the lock bolt rubber bushing can provide a guiding effect when the cab falls from a turning state, so that a locking body assembly connected to the cab is prevented from colliding with a hydraulic lock; the butterfly wing type bolt rubber bushing can be reset after the displacement along the driving direction of the cab occurs, and the rear suspension can be kept at the initial installation position without front and rear inclination.

Drawings

The present invention will now be further described with reference to the accompanying drawings.

FIG. 1 is a perspective view of the rear suspension of the cab of the present invention;

FIG. 2 is a perspective view showing the opened state of the swing arm rubber bushing and the lock plunger rubber bushing in the rear suspension of the cab according to the present invention;

FIG. 3 is an exploded view of the rear suspension swing arm welding assembly of the cab of the present invention including a swing arm rubber bushing;

FIG. 4 is a perspective view of the rear suspension swing arm rubber bushing of the cab of the present invention;

FIG. 5 is a perspective view of the rear suspension latch rubber bushing of the cab of the present invention;

fig. 6 is a front view of two lower supports of the rear suspension of the cab of the invention;

fig. 7 is a perspective view of two lower supports of the rear suspension of the cab of the present invention.

Detailed Description

The technical solution of the present invention will be described in detail and fully with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "horizontal", "vertical", "upper", "lower", "left", "right", "inner", "outer", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and the description is only for convenience of description and simplification, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, e.g., as meaning a fixed connection, a releasable connection, or a hinged connection. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1-7, a cab rear suspension comprises a beam assembly 10 and two sets of symmetrical rear suspension assemblies at two ends of the beam assembly 10, wherein each rear suspension assembly comprises an upper lock body assembly 1, a hydraulic lock 2, a swing arm welding assembly 3, a rear suspension connecting bracket 5, a rear suspension air spring assembly 4 and two lower supports 6; the upper lock body assembly 1 is connected with a cab, and the lower support 6 is connected with a frame; the swing arm welding assembly 3 comprises an A end 3A and a B end 3B; the rear suspension connecting bracket 5 comprises an A end 5A and a B end 5B; the upper lock body assembly 1, the hydraulic lock 2, the end A3A of the swing arm welding assembly, the rear suspension air spring assembly 4, the end A5A of the rear suspension connecting support and the lower support 6 are sequentially connected; the B end 3B of the swing arm welding assembly is connected with the B end 5B of the rear suspension connecting bracket; and the B end 5B of the rear suspension connecting bracket is connected with a beam assembly 10. Swing arm welding assembly's B end 3B is equipped with sleeve 3C, be provided with swing arm rubber bush 3D in the sleeve 3C, swing arm rubber bush 3D passes through the pressure equipment sleeve 3C of impressing, passes bush 3D inner frame centre bore through bolt 3E and links to each other with rear overhang linking bridge B end 5B, realizes swing arm welding assembly 3 rotates around bolt 3E axis of rotation. The bolt rubber bushing 1B is arranged in a groove of the bolt support 1A, and the bolt rubber bushing 1B is fixed with the bolt support 1A through a bolt 1C and a nut 1D.

The utility model provides a cab suspension includes two kinds of not unidimensional undersetting 6, two kinds of undersetting 6 divide into A end 6A and B end 6B, the A end 6A of two kinds of undersetting connects rear overhang air spring assembly 5, two kinds of undersetting A ends 6A are the same, B end 6B is different, two kinds of undersetting B ends 6B can select to link to each other with two kinds of different width frames;

the utility model provides a suspension behind driver's cabin owing to reciprocate the in-process at the driver's cabin, swing arm welding assembly 3 uses bolt 3E axis of rotation to rotate as the center. In the direction along beam assembly 10 parallel, swing arm welding assembly 3 produces a displacement volume, through using the swing arm rubber bush 3D who takes both sides crescent hole, has increased bush 3D along the displacement volume of beam 10 parallel direction, has released the relative displacement volume between bolt 3E axis of rotation and the swing arm welding assembly 3, has reduced the wearing and tearing of hydraulic pressure lock 2 and the wearing and tearing of locking body set bar rubber bush 1B, has improved the travelling comfort of driver's cabin. The connecting part of the upper lock body assembly 1 and the hydraulic lock 2 adopts a lock plunger rubber bushing 1B, the lock plunger rubber bushing 1B comprises an outer framework 1B2, an inner framework 1B1 and a rubber part, the inner framework 1B1 is arranged in the inner side of the outer framework 1B2, and the inner framework 1B1 and the outer framework 1B2 are vulcanized into a whole through rubber. The bolt rubber bushing 1B is fixed in the upper lock body assembly 1 through the bolt 1C, the vibration of the rear suspension is transmitted to the lock sleeve outer frame 1B2 through the hydraulic lock 2, the vibration of the outer frame 1B2 transmitted to the inner frame 1B1 is buffered through the rubber between the inner frame and the outer frame, and the generation of abnormal sound is avoided. The lock bolt rubber bushing outer framework 1B2 is of a butterfly wing type structure integrally, two sides of the lock bolt rubber bushing outer framework are inwards inclined conical surfaces, and the conical surfaces can provide a guiding effect when a cab falls from a turning state, so that the collision between the upper lock body assembly 1 connected to the cab and the hydraulic lock 2 is avoided; the butterfly wing type bolt rubber bushing 1B can be reset after the displacement along the straight driving direction of the cab occurs, and the rear suspension can be kept at the initial installation position without front and rear inclination.

The utility model provides a cab rear suspension, the direction that defines the car and go straight line is the fore-and-aft direction, and the direction parallel with crossbeam assembly 10 is horizontal, and when the cab falls by the upset state, the conical surface of set bar rubber bush 1B can provide longitudinal guide effect, avoids upper lock body assembly 1 connected on the cab to collide with hydraulic lock 2; simultaneously, swing arm rubber bush 3D is because transversely there is the symmetry crescent moon hole, and the horizontal deflection of bush 3D is big, when the driver's cabin whereabouts, can make swing arm welding assembly 3 produce horizontal great displacement through swing arm rubber bush 3D's horizontal deformation for lock plunger rubber bush 1B of back suspension lock body 1 can fall into 2 buckles of hydraulic pressure smoothly.

The utility model provides a driver's cabin rear suspension, swing arm rubber bush 3D and sleeve 3C interference fit, swing arm rubber bush 3D external diameter slightly is greater than sleeve 3C internal diameter, swing arm rubber bush 3D impresses sleeve 3C through the pressure equipment, the rubber part of swing arm rubber bush 3D is in a little compression state after the pressure equipment, can make swing arm rubber bush 3D obtain better durability; the swing arm rubber bushing 3D is provided with a crescent hole along the connecting line direction of the hydraulic locks 2 at two sides, and the axis of the crescent hole is superposed with the axis of the swing arm rubber bushing 3D; swing arm rubber bush 3D inner frame both ends are higher than the exoskeletal, and when swing arm rubber bush 3D was arranged in the recess and was tightened with bolt 3E and nut 3F, inner frame length equaled the recess width, can avoid the recess to warp inwards.

The utility model provides a suspension behind driver's cabin, set bar rubber bush inner frame 1B1 length is greater than exoskeleton length 1B2, inner frame 1B1 both ends all are higher than exoskeleton 1B2, set bar rubber bush 1B arranges in set bar support 1A recess, with bolt 1C and nut 1D tight back of beating, recess side laminating inner frame 1B1 both ends, the recess side leaves the space with exoskeleton 1B2, provide the release space when rubber warp too greatly.

The utility model provides a suspension behind the driver's cabin, crossbeam strengthening rib 10A is equipped with in the middle of and wears out the hole, it is used for passing 2 connecting wires of hydraulic pressure lock to wear out the hole. The rear suspension connecting bracket 5 is provided with a plurality of through holes, and the through holes are used for fixing the connecting line of the hydraulic lock 2 and the rear suspension air pipe.

The utility model provides a driver's cabin rear suspension still includes altitude valve assembly 7, altitude valve upper bracket 8 and altitude valve lower bracket 9, altitude valve assembly 7 is arranged in the rear suspension linking bridge 5 lateral part, and is fixed with rear suspension linking bridge 5 through altitude valve lower bracket 9, altitude valve upper bracket 8 is arranged in the rear suspension air spring assembly 4 and the junction of swing arm welding assembly 3; the altitude valve assembly 7 and the altitude valve upper bracket 8 are connected and used for controlling the vertical height of the cab.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims (6)

1. The cab rear suspension is characterized by comprising a beam assembly and two groups of rear suspension assemblies arranged at two ends of the beam assembly, wherein each rear suspension assembly comprises an upper lock body assembly, a hydraulic lock, a swing arm welding assembly, a rear suspension connecting support, a rear suspension air spring assembly and two lower supports; one end of the upper lock body assembly is connected with the cab; the other end of the upper lock body assembly is provided with a lock bolt rubber bushing, the whole outer framework of the lock bolt rubber bushing adopts a butterfly wing type structure, two sides of the outer framework are inwards inclined conical surfaces, and the swing arm welding assembly comprises a swing arm welding assembly A end and a swing arm welding assembly B end; the rear suspension connecting bracket comprises a rear suspension connecting bracket A end and a rear suspension connecting bracket B end; the upper lock body assembly, the hydraulic lock, the end A of the swing arm welding assembly, the rear suspension air spring assembly, the end A of the rear suspension connecting support and the lower support are sequentially connected; and the B end of the swing arm welding assembly is connected with the B end of the rear suspension connecting bracket.

2. The cab rear suspension of claim 1, wherein the upper lock body assembly comprises 1 bolt bracket 1 bolt and 1 bolt rubber bushing, the bolt bracket comprising two upper and lower U-shaped plates; the axial length of the lock bolt rubber bushing is the same as the size of the lower U-shaped plate opening, and the lock bolt rubber bushing is arranged on the inner side of the lower U-shaped plate opening and passes through an inner hole of the lock bolt rubber bushing and is fixed with the lower U-shaped plate through a bolt; the rear suspension connecting bracket is composed of two side plates and a bottom plate, the two side plates are respectively erected on two sides of the bottom plate, and the bottom plate and the side plates form a groove; a sleeve is arranged at the end B of the swing arm welding assembly, a swing arm rubber bushing is arranged in the sleeve, and the swing arm rubber bushing is pressed into the sleeve through press fitting; the swing arm rubber bushing is provided with a crescent hole along the connecting line direction of the hydraulic locks on the two sides, and the axis of the crescent hole is superposed with the axis of the swing arm rubber bushing; swing arm welding assembly arranges in the back overhang linking bridge recess, swing arm rubber bush inner frame axial length equals the recess width, and the bolt passes swing arm rubber bush hole with the back overhang linking bridge is fixed, makes swing arm welding assembly revolutes the rotation axis bolt center pin and rotates.

3. The cab rear suspension of claim 2, wherein the swing arm rubber bushing is pressed in from two sides, and the axial length of the inner frame of the swing arm rubber bushing is greater than that of the sleeve; the swing arm rubber bushing comprises an inner framework, an outer framework and a rubber part, wherein the inner framework is arranged on the inner side of the outer framework, the inner framework and the outer framework are vulcanized into a whole through rubber, and two ends of the inner framework are both longer than two ends of the outer framework; the set bar rubber bushing includes exoskeleton, inner frame and rubber part, the inner frame is arranged in the exoskeleton is inboard, the inner frame and the outer frame vulcanize as an organic whole through rubber, inner frame axial length is greater than exoskeleton axial length, the inner frame both ends all are good at exoskeleton both ends, fixing bolt arranges in the inner frame axle.

4. The cab rear suspension of claim 2, wherein a reinforcing rib is arranged on the inner side of the groove of the lower U-shaped plate; for reinforcing the strength of the bolt carrier.

5. The cab rear suspension of claim 1, wherein the beam assembly is composed of two side plates and a bottom plate, the two side plates respectively stand on two sides of the bottom plate to form a groove, reinforcing ribs are arranged inside the grooves, and an outlet hole is formed in the middle of each reinforcing rib and used for allowing a hydraulic lock connecting line to pass through.

6. The cab rear suspension of claim 1, further comprising a leveling valve assembly and leveling valve upper and lower brackets; the altitude valve assembly is arranged on the side part of the rear suspension connecting bracket and is fixed with the rear suspension connecting bracket through an altitude valve lower bracket, and the altitude valve upper bracket is arranged at the joint of the rear suspension air spring assembly and the swing arm welding assembly; the altitude valve assembly and the altitude valve upper bracket are connected and used for controlling the vertical height of the cab.

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