Front suspension of cab of commercial light truck

Abstract

The utility model discloses a front suspension of a cab of a commercial light truck, which belongs to the technical field of front suspensions of cabs and comprises two swing arms, two swing arm supports and a turnover support arm. The swing arm comprises a swing arm support, one end of the swing arm support is rotationally connected with the swing arm support, the other end of the swing arm support is provided with a first-stage vibration reduction rubber part, and a torsion bar assembly is arranged on the first-stage vibration reduction rubber part in a penetrating mode. A second-stage vibration reduction assembly is further installed on the frame longitudinal beam. The second-stage vibration reduction assembly comprises a second-stage vibration reduction support connected with the frame longitudinal beam, the upper side of the second-stage vibration reduction support is provided with an upper vibration reduction rubber part supported on the lower side of the swing arm, the lower side of the second-stage vibration reduction support is provided with a lower vibration reduction rubber part, and the second-stage vibration reduction support and the lower vibration reduction rubber part are connected through a bolt assembly. On the basis that the function of a torsion bar energy storage structure overturning cab is reserved, the shock absorption stroke is increased through two-stage rubber shock absorption and the swing arm, impact on the cab is reduced, the shock absorption effect of suspension is improved, the using mileage of a first-stage shock absorption rubber part can be increased, cost is reduced, space is compact, and practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of cab front suspensions, in particular to a commercial light truck cab front suspension. Background Art

[0002] Commercial vehicles are a means of transportation, and drivers are essential drivers who must have comfort requirements. Therefore, in the automotive industry, various vibration damping devices are designed between the cab and the chassis to cushion the impact of the road on the cab. This device is the cab suspension device.

[0003] As a means of transportation, commercial vehicles have maintenance requirements during their use cycle. The cab must be flipped over to facilitate chassis maintenance, and the corresponding device is the cab lifting device.

[0004] Today's cab suspensions are divided into front and rear suspensions. Commercial light trucks generally use a torsion bar front suspension without an independent lifting device. The torsion bar front suspension is supported by rubber damping blocks, and the cab rollover force is provided by a torsion bar. The torsion bar is fixed to the suspension bracket via a torsion bar spline sleeve and a torsion bar spline sleeve arm, and the suspension bracket is rigidly connected to the vehicle frame. Its advantages are simple structure, small footprint, and low cost. Its disadvantages are that the rubber damping blocks and torsion bar are rigidly connected to the vehicle frame via the suspension bracket, resulting in a small damping stroke, poor damping effect, and easy damage to the rubber blocks. In addition, commercial light trucks use a full-floating damping system with damping springs and dampers, which has an independent lifting device. The rollover lifting force is generally provided by a hydraulic cylinder. This front suspension has the advantage of significant damping effect, but has the disadvantages of large footprint, complex structure, a large number of parts, higher cost, and complex maintenance. It is rarely used on commercial light trucks. Utility Model Content

[0005] In order to solve the problems of traditional torsion bar type cab front suspension, in which the rubber vibration damping block and the torsion bar are rigidly connected to the frame through the suspension bracket, the vibration damping stroke is small, the vibration damping effect is poor, and the rubber block is easily damaged, the utility model provides a commercial light truck cab front suspension.

[0006] The utility model is realized through the following technical solutions:

[0007] The utility model discloses a commercial light truck cab front suspension, including two swing arms, two swing arm supports can be positioned and installed on two frame longitudinal beams respectively and the turnover support arm can be connected and installed with the cab bottom, the swing arm includes swing arm support, and one end of swing arm support is rotatably connected with swing arm support, and the other end of swing arm support is equipped with primary damping rubber part, and the torsion bar assembly that can twist the turnover support arm is arranged on the two corresponding primary damping rubber parts, and the frame longitudinal beam is also equipped with secondary damping assembly, and the secondary damping assembly includes the secondary damping support that is connected with the frame longitudinal beam, the upper side of secondary damping support is equipped with the upper damping rubber part that supports the lower side of swing arm, the lower side of secondary damping support is equipped with the lower damping rubber part, and the bolt assembly is sequentially penetrated and connected from the lower side to the upper side of lower damping rubber part, secondary damping support, upper damping rubber part and swing arm.

[0008] The further improvement of the utility model still has that one end of swing arm support is equipped with swing arm bushing, and swing arm bushing is rotatably connected with swing arm support through pin shaft assembly.

[0009] The further improvement of the utility model still has that the turnover support arm is left-right symmetrical and is provided with two.

[0010] The further improvement of the utility model still has that the upper side of turnover support arm can be connected and installed with the cab floor longitudinal beam.

[0011] The further improvement of the utility model still has that the secondary damping support is "J" shaped bending structure.

[0012] The further improvement of the utility model still has that swing arm support includes swing arm upper support that is U shaped bending and swing arm lower support that is connected with the lower side of swing arm upper support, and swing arm bushing is arranged on the upper inner side of swing arm upper support.

[0013] The further improvement of the utility model still has that swing arm lower support is L shaped bending structure, and swing arm lower support is connected and installed with frame longitudinal beam.

[0014] The further improvement of the utility model still has that swing arm upper support and swing arm lower support are respectively formed by sheet metal, and swing arm upper support and swing arm lower support are welded and fixed.

[0015] The further improvement of the utility model still has that swing arm upper support and swing arm lower support adopt the steel plate material with the thickness of 5-6mm.

[0016] The further improvement of the utility model still has that torsion bar assembly includes torsion bar sleeve pipe that is connected and installed with turnover support arm and torsion bar spring that is arranged in the inside of torsion bar sleeve pipe, one end of torsion bar spring is connected with swing arm support through bushing spline, the other end of torsion bar spring is connected with torsion bar sleeve pipe through bushing spline, and torsion bar sleeve pipe and the primary damping rubber part on both sides adopt shaft hole gap cooperation.

[0017] From the above technical scheme, the utility model has the beneficial effects that:

[0018] When the cab moves up and down, the torsion bar assembly is subjected to the damping energy absorption of the first-stage damping rubber piece in the left and right swing arm supports by the transmission of the turnover support arm, and the swing arm support is subjected to the damping energy absorption of the second-stage damping assembly and further reduces the impact on the cab when the first-stage damping rubber piece is stressed and makes the swing arm support rotate along the hinge position of the swing arm support base. Meanwhile, the swing arm increases the damping stroke of the cab when rotating around the swing arm support base. The second-stage damping assembly is provided with the upper damping rubber piece and the lower damping rubber piece respectively installed on the upper and lower sides of the second-stage damping support, so that good bidirectional damping effect can be achieved. On the basis of retaining the function of the torsion bar energy storage structure for overturning the cab, the swing arm increases the damping stroke, reduces the impact on the cab, increases the damping effect of the suspension, the increase of the second-stage damping assembly also reduces the damage of the first-stage damping rubber piece, and the service life of the first-stage damping rubber piece is increased. The rubber damping block greatly reduces the cost of the spring damper with damper, and the required space is smaller than that of the latter. The torsion bar is used to replace the hydraulic oil cylinder lifting system, the manufacturing cost is also lower, and the increase of the damping stroke and the addition of the secondary damping provide more comfortable driving and riding feelings for the driver and passengers. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the present application, the drawings needed to be used in the description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 The present application is a specific embodiment of the structural schematic diagram.

[0021] Figure 2 The present application is a specific embodiment of the installation schematic diagram.

[0022] Figure 3 The present application is a specific embodiment of the side view cross-sectional structural schematic diagram.

[0023] Figure 4 The present application is a specific embodiment of the torsion bar assembly structural schematic diagram.

[0024] Figure 5 The present application is a specific embodiment of the pin shaft assembly structural schematic diagram.

[0025] In the accompanying drawings: 1-swing arm; 101-swing arm bushing; 102-first-stage vibration-damping rubber part; 103-swing arm bracket; 2-swing arm support; 3-second-stage vibration-damping assembly; 301-upper vibration-damping rubber part; 302-lower vibration-damping rubber part; 303-second-stage vibration-damping bracket; 4-torsion bar assembly; 401-torsion bar sleeve; 402-torsion bar spring; 5-flip support arm; 6-bushing spline; 7-cab floor longitudinal beam; 8-frame longitudinal beam; 9-bolt assembly; 10-pin shaft assembly. DETAILED DESCRIPTION

[0026] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0027] like Figures 1-5 As shown, the utility model discloses a front suspension of a cab of a commercial light truck, comprising two swing arms 1, two left and right swing arm supports 2 that can be respectively positioned and mounted on two frame longitudinal beams 8, and a flip support arm 5 that can be connected and mounted to the bottom of the cab; the swing arm 1 includes a swing arm bracket 103, the rear end of the swing arm bracket 103 is rotatably connected and mounted with the swing arm support 2, and the front end of the swing arm bracket 103 is installed with a primary vibration-damping rubber member 102, and two corresponding primary vibration-damping rubber members 102 are penetrated with a torsion bar assembly 4 that can twist the flip support arm 5, that is, the flip support arm 5 is arranged Installed on the torsion bar assembly 4; a secondary vibration damping assembly 3 is also installed on the frame longitudinal beam 8; the secondary vibration damping assembly 3 includes a secondary vibration damping bracket 303 connected to the frame longitudinal beam 8, an upper vibration damping rubber part 301 supported on the lower side of the middle part of the swing arm 1 is provided on the upper side of the secondary vibration damping bracket 303, a lower vibration damping rubber part 302 is provided on the lower side of the secondary vibration damping bracket 303, and also includes a bolt assembly 9 that passes through and connects the lower vibration damping rubber part 302, the secondary vibration damping bracket 303, the upper vibration damping rubber part 301 and the swing arm 1 from bottom to top (the secondary vibration damping assembly 3 is easy to install).

[0028] When the cab moves up and down, the force is transmitted to the torsion bar assembly 4 through the tilting support arm 5. The torsion bar assembly 4 is then subjected to the vibration-absorbing energy of the primary vibration-damping rubber members 102 within the left and right swing arm brackets 103. Simultaneously, the force applied to the primary vibration-damping rubber members 102 causes the swing arm bracket 103 to rotate along its hinged connection with the swing arm support 2, where it is absorbed by the secondary vibration-damping assembly 3, further reducing the impact on the cab. Simultaneously, the swing arm 1 increases the vibration-damping travel of the cab as it rotates around the swing arm support 2. Furthermore, the secondary vibration-damping assembly 3 utilizes an upper vibration-damping rubber member 301 and a lower vibration-damping rubber member 302 mounted on the upper and lower sides of the secondary vibration-damping bracket 303, respectively, to achieve excellent bidirectional vibration-damping effects.

[0029] This commercial light truck cab front suspension retains the torsion bar energy storage structure's flipping cab function. Through two-stage rubber damping, the swing arm 1 increases the damping stroke, reducing impact on the cab and enhancing the suspension's damping effect. The addition of the secondary damping assembly 3 also reduces damage to the primary damping rubber member 102, increasing its mileage. Furthermore, the rubber damping block is significantly less expensive and requires less space than a spring damper with a damper. Using a torsion bar instead of a hydraulic cylinder lifting system also reduces manufacturing costs. The increased damping stroke and the inclusion of secondary damping provide a more comfortable ride for the driver and passengers.

[0030] The secondary vibration damping assembly 3 is connected to the frame longitudinal beam 8 through the secondary vibration damping bracket 303. While playing the role of vibration reduction, it also serves as a flipping fixing point for the torsion bar assembly 4.

[0031] The torsion bar assembly 4 serves as a kinetic energy storage element for the tilting cab and also acts as a lateral stabilizer bar for the left and right swing arms 1.

[0032] Among them, the rear end of the swing arm bracket 103 is connected with a swing arm bushing 101, and the swing arm bushing 101 is rotatably connected to the swing arm support 2 through the pin assembly 10. The reliability and stability of the rotational connection between the swing arm bracket 103 and the swing arm support 2 are achieved.

[0033] Among them, the flip support arm 5 is set to two symmetrically on the left and right. The upper side of the flip support arm 5 can be connected and installed with the cab floor longitudinal beam 7. Ensure the stability and reliability of the cab connection support.

[0034] like Figure 3 As shown, the secondary vibration damping bracket 303 is a "J"-shaped bending structure. The structure is simple, the upper vibration damping rubber part 301 and the lower vibration damping rubber part 302 are easily connected and installed, and the swing arm bracket 103 is effectively and reliably supported.

[0035] like Figure 1 、 2As shown in FIGS. 5, the swing arm support 2 comprises a swing arm upper support bent in a U shape and a swing arm lower support connected to the lower side of the swing arm upper support, and the swing arm bushing 101 is arranged on the inner side of the upper part of the swing arm upper support. The swing arm lower support is bent in an L shape and is connected and installed with the vehicle frame longitudinal beam 8. The swing arm upper support and the swing arm lower support are respectively formed by sheet metal, and are welded and fixed. The swing arm upper support and the swing arm lower support are made of steel plate with a thickness of 5-6 mm. The swing arm support 2 has simple structure, high strength, and is easy to form, can realize reliable rotation support of the swing arm 1, and has large deformation energy absorption effect in the cab collision test, and is not easy to be separated from the vehicle frame.

[0036] As shown in FIGS. 5, the swing arm support 2 comprises a swing arm upper support bent in a U shape and a swing arm lower support connected to the lower side of the swing arm upper support, and the swing arm bushing 101 is arranged on the inner side of the upper part of the swing arm upper support. The swing arm lower support is bent in an L shape and is connected and installed with the vehicle frame longitudinal beam 8. The swing arm upper support and the swing arm lower support are respectively formed by sheet metal, and are welded and fixed. The swing arm upper support and the swing arm lower support are made of steel plate with a thickness of 5-6 mm. The swing arm support 2 has simple structure, high strength, and is easy to form, can realize reliable rotation support of the swing arm 1, and has large deformation energy absorption effect in the cab collision test, and is not easy to be separated from the vehicle frame. Figure 1 、 2 As shown in FIGS. 5, the swing arm support 2 comprises a swing arm upper support bent in a U shape and a swing arm lower support connected to the lower side of the swing arm upper support, and the swing arm bushing 101 is arranged on the inner side of the upper part of the swing arm upper support. The swing arm lower support is bent in an L shape and is connected and installed with the vehicle frame longitudinal beam 8. The swing arm upper support and the swing arm lower support are respectively formed by sheet metal, and are welded and fixed. The swing arm upper support and the swing arm lower support are made of steel plate with a thickness of 5-6 mm. The swing arm support 2 has simple structure, high strength, and is easy to form, can realize reliable rotation support of the swing arm 1, and has large deformation energy absorption effect in the cab collision test, and is not easy to be separated from the vehicle frame.

[0037] The front suspension of the commercial light truck cab, when the cab moves up and down, transmits to the torsion bar assembly 4 through the turnover support arm 5, and the torsion bar assembly 4 is subjected to the damping energy absorption effect of the first damping rubber piece 102 in the swing arm bracket 103 on the left and right sides. At the same time, after the first damping rubber piece 102 is stressed, the swing arm bracket 103 rotates along the hinge position of the swing arm support 2, is subjected to the damping energy absorption of the second damping assembly 3, further reduces the impact on the cab, and increases the damping stroke of the cab in the rotation around the swing arm support 2. The second damping assembly 3 adopts the upper damping rubber piece 301 and the lower damping rubber piece 302 respectively installed on the upper side and the lower side of the second damping bracket 303, and can realize good bidirectional damping effect. On the basis of retaining the function of the torsion bar energy storage structure of the turnover cab, through two-stage rubber damping, the swing arm 1 increases the damping stroke, reduces the impact on the cab, increases the damping effect of the suspension, the increase of the second damping assembly 3 also reduces the damage of the first damping rubber piece 102, and can increase the service mileage of the first damping rubber piece 102. The cost of the rubber damping block is greatly reduced compared with the spring damper with damper, and the required space is smaller than the latter. The use of torsion bar instead of hydraulic cylinder lifting system also has lower manufacturing cost, and at the same time, the increase of damping stroke and the addition of secondary damping provide more comfortable driving and riding feeling for the driver and passengers.

[0038] The various embodiments described in this specification are presented by way of example, and each embodiment describes a specific feature of the application that is independently useful. Each embodiment can be combined with any other embodiment, and the description of each embodiment is not limited to the specific features described.

[0039] The terms "upper," "lower," "outer," "inner," and the like in the description and the claims of the application and the above drawings, if present, are used for distinguishing between like elements of the application and not necessarily for describing a specific relative position. It is to be understood that the use of such terms is not meant to limit the application to the position illustrated in the drawings or described herein. It is to be understood that the drawings are not necessarily to scale and that, unless otherwise indicated, a singular term such as "a," "an," and "the" is meant to include the possible plural forms as well, unless the context clearly indicates otherwise. It is also to be understood that the term "including" as used herein is meant to be equivalent to the term "comprising" and that the term "consisting of is meant to be equivalent to the term "consisting only of.

[0040] The above description of disclosed embodiments is intended to be illustrative, and not restrictive. Many embodiments will be apparent to those of skill in the art upon reviewing the above description. The scope of the application should, therefore, be determined not with reference to the above description, but instead with reference to the appended claims, along with their full scope of equivalents.

Claims

1. A commercial light truck cab front suspension, characterized by, The utility model provides a kind of swing arm type driver's cab, including two swing arms (1), two swing arm supports (2) capable of being positioned and installed on two frame longitudinal beams (8) respectively and overturning support arm (5) capable of being connected and installed with the bottom of driver's cab;Swing arm (1) includes swing arm support (103), swing arm support (103) one end is rotatably connected and installed with swing arm support (2), swing arm support (103) other end is equipped with one-stage damping rubber (102), two corresponding one-stage damping rubber (102) are equipped with torsion bar assembly (4) that can twist overturning support arm (5) on it;Frame longitudinal beam (8) is also equipped with two-stage damping assembly (3);Two-stage damping assembly (3) includes two-stage damping support (303) connected and installed with frame longitudinal beam (8), the upper side of two-stage damping support (303) is equipped with the upper damping rubber (301) supported in the lower side of swing arm (1), the lower side of two-stage damping support (303) is equipped with lower damping rubber (302), and it further includes bolt assembly (9) sequentially penetrating and connecting lower damping rubber (302), two-stage damping support (303), upper damping rubber (301) and swing arm (1) from bottom to top.

2. The commercial light truck cab front suspension of claim 1, wherein, Swing arm support (103) one end is connected with swing arm bushing (101), and swing arm bushing (101) is rotatably connected with swing arm support (2) through pin shaft assembly (10).

3. The commercial light truck cab front suspension of claim 1, wherein, Overturning support arm (5) is symmetrically arranged as two.

4. The commercial light truck cab front suspension according to claim 3, characterized in that: Overturning support arm (5) upper side can be connected and installed with driver's cab floor longitudinal beam (7).

5. The commercial light truck cab front suspension of claim 1, wherein, Two-stage damping support (303) is in the shape of a Chinese character ''j''.

6. The commercial light truck cab front suspension of claim 2, wherein, Swing arm support (2) includes swing arm upper support in the shape of U-shaped bending and swing arm lower support connected to the lower side of swing arm upper support, and swing arm bushing (101) is arranged on the inner side of the upper part of swing arm upper support.

7. The commercial light truck cab front suspension of claim 6, wherein, Swing arm lower support is in the shape of L-shaped bending structure, which is connected and installed with frame longitudinal beam (8).

8. The commercial light truck cab front suspension of claim 7, wherein, Swing arm upper support and swing arm lower support are respectively formed by sheet metal, and the two are welded and fixed.

9. The commercial light truck cab front suspension of claim 8, wherein, Swing arm upper support and swing arm lower support are made of steel plate with a thickness of 5-6 mm.

10. The commercial light truck cab front suspension of claim 1, wherein, Torsion bar assembly (4) includes torsion bar sleeve (401) connected and installed with overturning support arm (5) and torsion bar spring (402) arranged in the inside of torsion bar sleeve (401);Torsion bar spring (402) one end is connected with swing arm support (103) through bushing spline (6), and torsion bar spring (402) other end is connected with torsion bar sleeve (401) through bushing spline (6);Torsion bar sleeve (401) and two sides one-stage damping rubber (102) are matched by shaft hole gap.

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