CN223384264U

CN223384264U - Hydraulic lifting type suspension device for rear frame of caravan

Info

Publication number: CN223384264U
Application number: CN202422661195.6U
Authority: CN
Inventors: 韩晓东
Original assignee: Zhejiang Gaodeng Automobile Co ltd
Current assignee: Zhejiang Gaodeng Automobile Co ltd
Priority date: 2024-11-01
Filing date: 2024-11-01
Publication date: 2025-09-26
Anticipated expiration: 2034-11-01

Abstract

The utility model discloses a hydraulic lifting suspension device for a rear frame of a motor home, which comprises a cross arm, wherein one end of the cross arm is hinged with a hydraulic shock absorption component, the middle part of the cross arm is fixedly connected with one end of a longitudinal arm, the other end of the longitudinal arm is provided with a transverse connecting sleeve, the transverse connecting sleeve is fixedly connected with the frame, one end of a spring is fixed on a first support of the longitudinal arm, the other end of the spring is fixed on a second support of the frame, the middle part of the spring is provided with an elastic element, the first hydraulic shock absorber and the second hydraulic shock absorber are arranged in parallel and hinged with the frame, and the third hydraulic shock absorber and the second hydraulic shock absorber are arranged at an acute angle and hinged with the frame. The utility model overcomes the defects of the prior art, and the elastic element and the hydraulic damping component can realize the transverse damping and buffering of the frame while ensuring the adjustable height of the rear frame of the motor home, so as to avoid the problem that the frame shakes more severely due to the higher weight center of the motor home when the motor home road meets uneven ground, and obtain better riding experience.

Description

Hydraulic lifting type suspension device for rear frame of caravan

Technical Field

The utility model relates to the technical field of frame suspension, in particular to a hydraulic lifting type suspension device for a rear frame of a motor home.

Background

The suspension is a generic term for all force-transmitting connection devices between the frame of a vehicle and the axle or wheels, which function to transmit forces and torsion forces acting between the wheels and the frame, and to cushion the impact forces transmitted to the frame or body by the uneven road surface and to attenuate the vibrations caused thereby, so as to ensure smooth running of the vehicle.

With the improvement of living standard, the travel is a preferred mode of leisure and relaxation in the holiday, and the caravan is favored by people as a travel product with two functions of 'house' and 'car'. The trailer type motor home is a recreational vehicle which is connected with the tail of a tractor and towed by the tractor, and a suspension adopted on the motor home is a key component affecting the running performance of the motor home. At present, the existing car as a house suspension generally comprises two wheels, a through shaft and two leaf springs, wherein the two wheels are respectively rotatably supported at two ends of the through shaft, and the leaf springs are fixedly connected between the through shaft and a frame through hoops. When the motor home runs on the road surface, the vibration generated by the wheels is buffered by the leaf springs, and the frame is kept relatively stable. Because the two wheels are rotatably supported at the two ends of the same through shaft, when the motor home runs on a bumpy road surface, the road surfaces contacted by the two wheels are different and are very easy to interfere with each other, so that the car body generates larger vibration; in addition, the suspension structure is a non-independent suspension structure with two wheels connected with the same through shaft, so that the smoothness of the motor home is poor when the motor home runs at a high speed, and meanwhile, the ground clearance is too low (less than or equal to 200 mm) due to the steel plate spring fixedly connected between the through shaft and the frame, so that the motor home is not suitable for off-road application.

The Chinese patent CN204726173U discloses a motor home independent suspension, which comprises a half shaft, a cross arm, a longitudinal arm, a spring and at least one hydraulic shock absorber, wherein the half shaft is fixedly connected to the cross arm, one end of the longitudinal arm is fixedly connected with the cross arm, the other end of the longitudinal arm is fixedly connected with a transverse connecting sleeve, the transverse connecting sleeve is hinged on a hinged support of a motor home frame, at least one lower hinged support is arranged on the transverse connecting sleeve, at least one upper hinged support is correspondingly arranged on the transverse arm, two ends of the hydraulic shock absorber are hinged on the cross arm and the motor home frame, a spring lower support is arranged on the longitudinal arm, a spring upper support is correspondingly arranged on the motor home frame, and two ends of the spring are respectively assembled in the spring upper support and the spring lower support. However, as the weight center of the motor home is higher, the influence of road conditions on the running process of the vehicle is larger, the swing of the vehicle body is larger, the device is connected between the vehicle frame and the suspension frame through the springs, the transverse connecting sleeve and the hydraulic shock absorber, the hydraulic shock absorber and the transverse connecting sleeve are hinged, the transverse swing of the vehicle frame is not enough, and the riding experience is poor.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides the hydraulic lifting type suspension device for the rear frame of the motor home, which overcomes the defects of the prior art and aims at solving the problem that the hydraulic lifting type suspension device for the rear frame of the motor home is insufficient in transversely buffering the car body.

The hydraulic lifting suspension device for the rear frame of the motor home comprises a frame, a transverse connecting sleeve, a longitudinal arm, a spring, a hydraulic shock absorber component and a cross arm, wherein one end of the cross arm is connected with a wheel shaft, the other end of the cross arm is hinged with the hydraulic shock absorber component, the middle of the cross arm is fixedly connected with one end of the longitudinal arm, the other end of the longitudinal arm is provided with the transverse connecting sleeve, the transverse connecting sleeve is fixedly connected with the frame, one end of the spring is fixed on a first supporting seat of the longitudinal arm, the other end of the spring is fixed on a second supporting seat of the frame, the middle of the spring is provided with an elastic element, the hydraulic shock absorber component comprises a first hydraulic shock absorber, a second hydraulic shock absorber and a third hydraulic shock absorber, the first hydraulic shock absorber and the second hydraulic shock absorber are arranged in parallel and hinged with the frame, and the third hydraulic shock absorber and the second hydraulic shock absorber are arranged in an acute angle and are hinged with the frame.

When the hydraulic shock absorber works, the first hydraulic shock absorber and the second hydraulic shock absorber are started to lift, the ground clearance of the frame is improved, vibration of wheels brought by uneven ground is transmitted to the springs and the hydraulic shock absorbing assembly through the cross arm, the springs are compressed under the action of force, impact of the cross arm to the frame is buffered, if the impact force is larger, the elastic elements in the middle of the springs participate in buffering, vibration energy is absorbed, meanwhile, after the first hydraulic shock absorber and the second hydraulic shock absorber receive the impact force, vibration energy is absorbed through internal liquid buffering, the third hydraulic shock absorber is adapted to change the connection angle after the frame vibrates, the transverse impact force and part of vertical impact force can be given to the frame, the first hydraulic shock absorber and the second hydraulic shock absorber are lowered, the third hydraulic shock absorber can buffer and absorb the transverse impact force of the frame after the ground uneven road section is finished, and the hinge connection changes the connection angle.

As a preferable technical scheme of the utility model, the cross arm comprises a cross arm body, a half arm, a first connecting part, a second connecting part and a third connecting part, wherein one end of the cross arm body is connected with a wheel shaft, the other end of the cross arm body is fixedly connected with the half arm, the half arm and the cross arm body are arranged at an acute angle, the third connecting part is arranged in the middle of the cross arm body and is used for fixedly connecting with a longitudinal arm, and the first connecting part and the second connecting part which are adjacent to the half arm and form a horizontal line are respectively used for hinging a first hydraulic shock absorber and a second hydraulic shock absorber.

As a preferable technical scheme of the utility model, the half arm comprises a fixing part and a first mounting part, wherein the fixing part is a square body with holes and is used for being fixedly connected with the end part of the cross arm, the other end of the fixing part is connected with the first mounting part, and the other end of the first mounting part is provided with a hinge structure and is used for being connected with a third hydraulic damper.

As a preferable technical scheme, the longitudinal arm further comprises a first longitudinal arm, a second longitudinal arm and a fixing support, wherein one ends of the first longitudinal arm and the second longitudinal arm are fixedly connected at an acute angle, the other ends of the first longitudinal arm and the second longitudinal arm are connected with a transverse connecting sleeve, the transverse connecting sleeve is hinged with a frame, the fixing support is connected with the first longitudinal arm and the second longitudinal arm and is adjacent to the frame and used for reinforcing structural rigidity of the longitudinal arm, and the first supporting seat is arranged at the position where one ends of the first longitudinal arm and the second longitudinal arm are fixedly connected at an acute angle.

As a preferable technical scheme of the utility model, the first supporting seat comprises a base, a guide shaft and a plastic sleeve, wherein the guide shaft and the plastic sleeve are fixed on the base, the guide shaft is a cylinder, and the guide shaft is arranged in a through hole in the middle of the plastic sleeve.

As a preferable technical scheme of the utility model, the spring is arranged in a through hole in the middle of the plastic sleeve and in clearance fit with the plastic sleeve, the elastic element is fixed on the guide shaft, and the diameter D of the elastic element is smaller than the inner diameter D of the spring.

As a preferable technical scheme of the utility model, the frame also comprises a plurality of hinge connection parts and transverse hinge connection parts, and the transverse hinge connection parts and the frame are arranged at an acute angle in the transverse direction.

Compared with the prior art, the utility model can realize the transverse shock absorption and buffering of the frame while ensuring the adjustable height of the rear frame of the motor home through the elastic element and the hydraulic shock absorption component, so that the problem that the frame shakes more severely due to the higher weight center of the motor home when the motor home road meets uneven ground is avoided, and better riding experience is obtained.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic top view of a first support base of the present utility model;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic diagram of a half arm structure according to the present utility model;

The vehicle wheel comprises a frame 1, a frame 101, a second support, a hinge connection part 102, a transverse hinge connection part 103, a transverse connecting sleeve 2, a transverse connecting sleeve 3, a longitudinal arm 301, a first support seat 3011, a base 3012, a guide shaft 3013, a plastic sleeve 302, a first longitudinal arm 303, a second longitudinal arm 304, a fixed support frame 4, a spring 401, an elastic element 5, a hydraulic shock absorption assembly 501, a first hydraulic shock absorber 502, a second hydraulic shock absorber 503, a third hydraulic shock absorber 6, a cross arm 601, a cross arm body 602, a half arm 6021, a fixed part 6022, a first installation part 603, a first connection part 604, a second connection part 605, a third connection part 7 and a wheel shaft.

Detailed Description

Referring to fig. 1-4, a hydraulic lifting suspension device for a rear frame of a motor home comprises a frame 1, a transverse connecting sleeve 2, a longitudinal arm 3, a spring 4, a hydraulic shock absorber 5 and a cross arm 6, wherein one end of the cross arm 6 is connected with a wheel shaft 7, the other end of the cross arm 6 is hinged with the hydraulic shock absorber 5, the middle part of the cross arm 6 is fixedly connected with one end of the longitudinal arm 3, the other end of the longitudinal arm 3 is provided with the transverse connecting sleeve 2, the transverse connecting sleeve 2 is fixedly connected with the frame 1, one end of the spring 4 is fixed on a first supporting seat 301 of the longitudinal arm 3, the other end of the spring 4 is fixed on a second supporting seat 101 of the frame 1, an elastic element 401 is arranged at the middle part of the spring 4, the hydraulic shock absorber 5 comprises a first hydraulic shock absorber 501, a second hydraulic shock absorber 502 and a third hydraulic shock absorber 503, the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 are arranged in parallel and hinged with the frame 1, and the third hydraulic shock absorber 503 is arranged at an acute angle with the second hydraulic shock absorber 502 and hinged with the frame 1.

When the hydraulic shock absorber works, the ground surface unevenness condition is met, the hydraulic suspension device is started, the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 are lifted, the ground separation distance of the frame 1 is improved, vibration of wheels brought by uneven ground is transmitted to the springs 4 and the hydraulic shock absorbing components 5 through the cross arm 6, the springs 4 are compressed under the action of force, the impact of the cross arm 6 on the frame 1 is buffered, if the impact force is larger, the elastic element 401 in the middle of the springs 4 participates in buffering and absorbs vibration energy, meanwhile, after the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 are subjected to impact force, the vibration energy is absorbed through internal liquid buffering, after the frame 1 vibrates, the third hydraulic shock absorber 503 is connected with a hinge, the hinge connection is adapted to change the connection angle, the transverse impact force and part of the frame 1 can be given, the transverse impact force and part of the vertical impact force of the frame 1 are buffered and absorbed, after the ground surface unevenness section is finished, the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 are lowered, and the third hydraulic shock absorber 503 are lowered down, the hinge connection angle is changed, and the transverse impact force of the frame 1 can still be buffered and absorbed.

The elastic element 401 and the hydraulic shock-absorbing component 5 are arranged, the height of the frame 1 at the rear part of the motor home can be adjusted, meanwhile, the frame 1 is transversely damped and buffered, when the motor home road meets uneven ground, the frame 1 shakes more severely due to the fact that the gravity center of the motor home is higher, the elastic element 401 can limit the transverse displacement of the spring 4, the phenomenon that the frame 1 vibrates for a long time transversely due to the fact that the transverse force brought by the frame 1 cannot be buffered and absorbed is avoided, riding experience is affected, the elastic element 401 can assist the spring 4 to play a role in damping and absorb vibration energy to a certain extent, vibration amplitude is attenuated, and the third hydraulic shock-absorbing component 503 arranged on the hydraulic shock-absorbing component 5 can buffer and absorb transverse vibration brought by the frame 1, so that the situation that the frame 1 is insufficient in transverse damping or excessively hard is avoided, and better riding experience is obtained.

Specifically, the cross arm 6 includes a cross arm body 601, a half arm 602, a first connecting portion 603, a second connecting portion 604 and a third connecting portion 605, one end of the cross arm body 601 is connected with the wheel axle 7, the other end of the cross arm body 601 is fixedly connected with the half arm 602, the half arm 602 and the cross arm body 601 are arranged at an acute angle, the third connecting portion 605 is arranged in the middle of the cross arm body 601 and is used for fixedly connecting the trailing arm 3, and a horizontal line adjacent to the half arm 602 is provided with the first connecting portion 603 and the second connecting portion 604 and is used for hinging the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 respectively. The setting of the cross arm 6 connects the wheels and the frame 1 into a whole, the middle is provided with the fixed position of the hydraulic shock absorption component 5, the installation of the hydraulic shock absorption component 5 is facilitated, the half arm 602 is designed to form an acute angle, the installation of the third hydraulic shock absorber 503 is perpendicular to the half arm 602, and the efficiency of buffering and absorbing vibration of the third hydraulic shock absorber 503 is improved.

Specifically, the half arm 602 includes a fixing portion 6021 and a first mounting portion 6022, the fixing portion 6021 is a square body with holes and is used for being connected and fixed with an end portion of the cross arm 6, the other end of the fixing portion 6021 is connected with the first mounting portion 6022, and the other end of the first mounting portion 6022 is provided with a hinge structure and is used for being connected with the third hydraulic damper 503. The arrangement is convenient for the half arm 602 to be fixedly connected with the cross arm 6, the appearance adopts a square body, the empty processing is convenient, and the later installation and disassembly speeds are improved.

Specifically, the trailing arm 3 further includes a first trailing arm 302, a second trailing arm 303, and a fixing bracket 304, one ends of the first trailing arm 302 and the second trailing arm 303 are fixedly connected at an acute angle, the other ends of the first trailing arm 302 and the second trailing arm 303 are connected with a transverse connecting sleeve 2, the transverse connecting sleeve 2 is hinged with the frame 1, the fixing bracket 304 is connected with the first trailing arm 302 and the second trailing arm 303, the fixing bracket 304 is adjacent to the frame 1 and is used for enhancing structural rigidity of the trailing arm 3, and the first supporting seat 301 is arranged at an acute angle fixing connection position at one ends of the first trailing arm 302 and the second trailing arm 303. The arrangement of the fixed support 304 adjacent to the frame 1 shortens the distance between the fixed support 304 and the frame 1, reduces the torque of the fixed support 304 when the frame 1 transversely moves, is beneficial to improving the rigidity and reliability of the whole structure of the trailing arm 3, and the arrangement of the first support seat 301 adjacent to the wheel shaft 7 has the largest vibration amplitude, shortens the distance between the first support seat 301 and the wheel shaft 7, avoids the collision between the wheel shaft 7 and the frame 1 due to overlarge vibration, improves the shock absorption and buffering capacity of the device and shortens the buffering reaction time.

Specifically, the first support base 301 includes a base 3011, a guide shaft 3012, and a plastic sleeve 3013, the guide shaft 3012 and the plastic sleeve 3013 are fixed on the base 3011, the guide shaft 3012 is a cylinder, and the guide shaft 3012 is disposed in a through hole in the middle of the plastic sleeve 3013. The first supporting seat 301 is simple in structure, various parts are convenient to install, later maintenance is facilitated easily when the parts are detached, the guide shaft 3012 can be used for transversely limiting the elastic element 401 and the spring 4, and the elastic element 401 can be conveniently installed and fixed.

Specifically, the spring 4 is disposed in a through hole in the middle of the plastic sleeve 3013 and is in clearance fit with the plastic sleeve 3013, and the elastic element 401 is fixed on the guide shaft 3012, and the diameter D of the elastic element 401 is smaller than the inner diameter D of the spring 4. The installation of setting up elastic component 401 like this is fixed, and supplementary plastic cover 3013 carries out horizontal spacing to spring 4 simultaneously, prevents that the horizontal vibration of frame 1 from causing the rocking of spring 4, influences the shock attenuation effect.

Specifically, the frame 1 further includes a plurality of hinge connection portions 102 and a transverse hinge connection portion 103, and the transverse hinge connection portion 103 is disposed at an acute angle with respect to the transverse direction of the frame 1. The frame 1 is arranged in such a way that the connection between the damping device and the trailing arm 3 is more stable, the influence of the vibration of the frame 1 on parts is reduced, the abrasion of the frame parts is lightened, the service life of the device parts is prolonged, and the damping and buffering efficiency of the hydraulic damping component 5 and the spring 4 is improved.

When the hydraulic shock absorber works, the ground surface unevenness condition is met, the hydraulic suspension device is started, the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 are lifted, the ground separation distance of the frame 1 is improved, vibration of wheels brought by uneven ground is transmitted to the springs 4 and the hydraulic shock absorbing components 5 through the cross arm 6, the springs 4 are compressed under the action of force, the impact of the cross arm 6 on the frame 1 is buffered, if the impact force is larger, the elastic element 401 in the middle of the springs 4 participates in buffering and absorbs vibration energy, meanwhile, after the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 are subjected to impact force, the vibration energy is absorbed through internal liquid buffering, after the frame 1 vibrates, the third hydraulic shock absorber 503 is connected with a hinge, the hinge connection is adapted to change the connection angle, the transverse impact force and part of the frame 1 can be given, the transverse impact force and part of the vertical impact force of the frame 1 are buffered and absorbed, after the ground surface unevenness section is finished, the first hydraulic shock absorber 501 and the second hydraulic shock absorber 502 are lowered, and the third hydraulic shock absorber 503 are lowered down, the hinge connection changes the connection angle, and the transverse impact force of the frame 1 can still be buffered and absorbed.

Claims

1. A hydraulic lifting suspension device for a rear frame of a motor home comprises a frame (1), a transverse connecting sleeve (2), a longitudinal arm (3), a spring (4), a hydraulic shock absorption assembly (5) and a cross arm (6), and is characterized in that one end of the cross arm (6) is connected with a wheel shaft (7), the other end of the cross arm (6) is hinged with the hydraulic shock absorption assembly (5), the middle of the cross arm (6) is fixedly connected with one end of the longitudinal arm (3), the other end of the longitudinal arm (3) is provided with the transverse connecting sleeve (2), the transverse connecting sleeve (2) is fixedly connected with the frame (1), one end of the spring (4) is fixed on a first supporting seat (301) of the longitudinal arm (3), the other end of the spring (4) is fixed on a second supporting seat (101) of the frame (1), an elastic element (401) is arranged in the middle of the spring (4), the hydraulic shock absorption assembly (5) comprises a first hydraulic shock absorber (501), a second hydraulic shock absorber (502) and a third hydraulic shock absorber (503), the first hydraulic shock absorber (501) and the second hydraulic shock absorber (502) are arranged in parallel, hinged with the frame (1) and the third shock absorber (503) is hinged with the second shock absorber (503).

2. The hydraulic lifting suspension device for the rear frame of the motor home according to claim 1, wherein the cross arm (6) comprises a cross arm body (601), a half arm (602), a first connecting portion (603), a second connecting portion (604) and a third connecting portion (605), one end of the cross arm body (601) is connected with a wheel shaft (7), the other end of the cross arm body (601) is fixedly connected with the half arm (602), the half arm (602) and the cross arm body (601) are arranged at an acute angle, the third connecting portion (605) is arranged in the middle of the cross arm body (601) and used for being fixedly connected with a longitudinal arm (3), and a first connecting portion (603) and a second connecting portion (604) which are adjacent to the half arm (602) and are arranged in a horizontal line are used for hinging the first hydraulic shock absorber (501) and the second hydraulic shock absorber (502) respectively.

3. The hydraulic lifting suspension device for the rear frame of the motor home according to claim 2, wherein the half arm (602) comprises a fixing part (6021) and a first mounting part (6022), the fixing part (6021) is a square body with holes and is used for being fixedly connected with the end part of the cross arm (6), the other end of the fixing part (6021) is connected with the first mounting part (6022), and the other end of the first mounting part (6022) is provided with a hinge structure and is used for being connected with the third hydraulic damper (503).

4. The hydraulic lifting suspension device for the rear frame of the motor home according to claim 3, wherein the longitudinal arms (3) further comprise a first longitudinal arm (302), a second longitudinal arm (303) and a fixing support (304), one ends of the first longitudinal arm (302) and the second longitudinal arm (303) are fixedly connected in an acute angle, the first longitudinal arm (302) and the second longitudinal arm (303) are connected with a transverse connecting sleeve (2) at the other end, the transverse connecting sleeve (2) is hinged with the frame (1), the fixing support (304) is connected with the first longitudinal arm (302) and the second longitudinal arm (303), the fixing support (304) is adjacent to the frame (1) and used for reinforcing structural rigidity of the longitudinal arms (3), and the first supporting seat (301) is arranged at the position where one ends of the first longitudinal arm (302) and the second longitudinal arm (303) are fixedly connected in an acute angle.

5. The hydraulic lifting suspension device for the rear frame of the motor home according to claim 1, wherein the first supporting seat (301) comprises a base (3011), a guide shaft (3012) and a plastic sleeve (3013), the guide shaft (3012) and the plastic sleeve (3013) are fixed on the base (3011), the guide shaft (3012) is a cylinder, and the guide shaft (3012) is arranged in a through hole in the middle of the plastic sleeve (3013).

6. The hydraulic lifting suspension device for the rear frame of the motor home according to claim 5, wherein the spring (4) is arranged in a through hole in the middle of the plastic sleeve (3013) and is in clearance fit with the plastic sleeve (3013), the elastic element (401) is fixed on the guide shaft (3012), and the diameter D of the elastic element (401) is smaller than the inner diameter D of the spring (4).

7. A hydraulic lifting suspension device for a rear frame of a motor home according to claim 3, wherein the frame (1) further comprises a plurality of hinge connection parts (102) and transverse hinge connection parts (103), and the transverse hinge connection parts (103) are arranged at an acute angle with respect to the transverse direction of the frame (1).