Front suspension lower support assembly of heavy truck cab

Abstract

The utility model relates to the technical field of automobiles, and discloses a heavy truck cab front suspension lower support assembly which comprises a lower support, a pin shaft and a fastener. The lower support is provided with a through hole, and the pin shaft is in interference fit with the through hole. The pin shaft sequentially penetrates through the lower support and the shock absorber lower hanging ring on the periphery. And a fastener is fixed on the pin shaft to press the lower hanging ring of the shock absorber on the lower bracket. Bending deformation and abrasion of the pin shaft can be greatly reduced, and the service life of parts is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a front suspension lower bracket assembly of a heavy truck cab. Background Art

[0002] The existing heavy truck cab front suspension lower bracket assembly consists of a lower bracket, a pin, and non-standard fasteners. The lower bracket has a φ14mm hole for inserting the pin to fix the lower ring of the shock absorber. During operation, after inserting the lower ring of the shock absorber, screw the non-standard fastener into the hole at the end of the pin to fix the pin to prevent the pin from rotating; then connect the lower bracket assembly to the frame, fasten it with the corresponding bolts and nuts, and then install other systems through other interfaces.

[0003] A φ14mm pin is used to connect the lower suspension ring of the shock absorber. The contact area between the lower bracket and the lower suspension ring of the shock absorber is small. When the vehicle is impacted, the stress on the pin is large and it is easy to bend and deform. At the same time, the existing lower bracket assembly of the front suspension is equipped with a large and special-shaped protruding component for connecting with the stabilizer bar assembly of the front suspension system. The protruding component is very heavy and does not meet the current trend and design requirements of energy saving, emission reduction and lightweighting of heavy trucks. Utility Model Content

[0004] In view of this, the utility model provides a heavy truck cab front suspension lower bracket assembly, which greatly reduces the bending deformation and wear of the pin shaft and prolongs the service life of the components.

[0005] The utility model is realized by the following technical solutions:

[0006] A heavy truck cab front suspension lower bracket assembly comprises a lower bracket, a pin shaft and a fastener; the lower bracket is provided with a through hole, and the pin shaft is interference fit with the through hole; the pin shaft passes through the lower bracket and the outer shock absorber lower lifting ring in sequence; the fastener is fixed on the pin shaft to press the shock absorber lower lifting ring onto the lower bracket.

[0007] Furthermore, the fastener includes a bolt and a limit plate, a threaded hole is provided at the end of the pin shaft along its axial direction, and the bolt cooperates with the threaded hole to press the limit plate onto the outer side of the lower suspension ring of the shock absorber.

[0008] Furthermore, it also includes a shaft head, which is coaxially fixed at the front end of the pin shaft, and the radial dimension of the shaft head is larger than the radial dimension of the pin shaft, and the cross section of the shaft head is non-circular; the diameter of the pin shaft is 25mm, and the diameter of the bolt is 14mm.

[0009] Furthermore, the lower bracket is provided with a height valve bracket mounting hole.

[0010] Furthermore, a protrusion facing the shaft head is provided on the upper edge of the lower bracket and connected to the stabilizing rod. The protrusion is a rectangular plate structure, and the protrusion is integrally formed with the lower bracket.

[0011] Furthermore, the lower bracket is provided with a plurality of weight-reducing holes.

[0012] Compared with the existing technology, the beneficial effects of the utility model are:

[0013] 1. The utility model changes the pin shaft with clearance fit in the prior art into a pin shaft with interference fit, thereby reducing the bending deformation and wear of the pin shaft and increasing the durability of the lower bracket assembly.

[0014] 2. The utility model uses a pin with a diameter of 25 mm, which increases the contact area between the pin and the lower bracket and the lower eye of the shock absorber compared to the prior art, reduces the stress of the pin under the impact condition of the vehicle, and further avoids excessive deformation or damage of the material; the cross-section of the shaft head is non-circular, which is convenient for maintenance and disassembly.

[0015] 3. The utility model integrates a height valve bracket mounting hole on the lower bracket, saving the overall front suspension system space and making installation easier.

[0016] 4. The protruding portion of the rectangular plate structure of the utility model and the multiple weight-reducing holes meet the requirements of lightweighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the lower bracket assembly of the utility model.

[0018] Figure 2 It is a left side view of section A of the lower bracket assembly of the utility model.

[0019] Figure 3 It is a schematic diagram of the pin shaft of the utility model.

[0020] Among them, 1-lower bracket, 2-pin shaft, 3-limiting plate, 4-bolt, 5-height valve bracket mounting hole, 6-shaft head, 7-protrusion, 8-lower lifting ring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The utility model provides a front suspension lower bracket assembly for a heavy truck cab, such as Figure 1 , 2 As shown, the lower bracket assembly includes a lower bracket 1, a pin 2 and a fastener; the lower bracket 1 is provided with a through hole, and the pin 2 is interference fit with the through hole, and the interference fit can reduce the bending deformation and wear of the pin 2; the pin 2 passes through the lower bracket 1 and the outer shock absorber lower hanging ring 8 in turn; the fastener is fixed on the pin 2 to press the shock absorber lower hanging ring 8 onto the lower bracket 1.

[0023] In this embodiment, the fasteners include bolts 4 and a limit plate 3; a threaded hole is provided at the end of the pin shaft 2 along its axial direction, and the end of the pin shaft 2 refers to an end passing through the lower suspension ring 8 of the shock absorber. The bolt 4 cooperates with the threaded hole to press the limit plate 3 onto the outer side of the lower suspension ring 8 of the shock absorber, and the outer side of the lower suspension ring 8 of the shock absorber refers to the side close to the end of the pin shaft 2. By tightening the bolt 4, the limit plate 3 is pressed onto the outer side of the lower suspension ring 8 of the shock absorber to limit the displacement of the lower suspension ring 8 of the shock absorber.

[0024] As an improvement, the lower bracket assembly also includes a shaft head 6, which is fixed at the front end of the pin 2, and the radial dimension of the shaft head 6 is larger than the radial dimension of the pin 2. During installation, a specific tool pad is used on the end face of the shaft head 6 to prevent the shaft head 6 and the pin 2 from bending and deforming during the pressing process, and then the pin 2 is pressed into the through hole through the press machine. The shaft head 6 can further prevent the pin 2 from falling off the lower bracket 1. The cross section of the shaft head 6 is non-circular. In a specific implementation, the shaft head 6 is obtained by milling a plane along the axial direction of the outer circumference of the cylinder. The plane can be symmetrically arranged to facilitate maintenance and disassembly.

[0025] Preferably, the diameter of the pin 2 is 25 mm, and the diameter of the bolt 4 is 14 mm. In the prior art, the diameter of the through hole of the front suspension lower bracket 1 that cooperates with the pin 2 is 14 mm, and the contact area with the pin 2 is relatively small. The diameter of the through hole on the lower bracket 1 is increased, and a pin 2 with a diameter of 25 mm is selected to have an interference fit with it. The contact area between the pin 2 and the lower bracket 1 and the lower suspension ring 8 of the shock absorber is increased, which reduces the stress on the pin 2 and further avoids deformation and wear of the pin 2. In this embodiment, the bolt 4 adopts a bolt M14*1.5*40 (GB / T16674.2-2004), which is easier to install and disassemble than the non-standard fasteners in the prior art.

[0026] As a further improvement, the lower bracket 1 is provided with a height valve bracket mounting hole 5. The original peripheral height valve bracket mounting hole 5 is integrated into the lower bracket 1 to save space; in specific implementation, the space can be further reasonably utilized according to actual conditions to arrange the mounting holes of other vehicle body systems.

[0027] As a further improvement, the lower bracket 1 removes the large and heavy special-shaped protrusions in the prior art. A protrusion 7 is provided on the upper edge of the lower bracket 1 to cooperate with the stabilizer bar. The protrusion 7 is a rectangular plate structure, and the protrusion 7 is integrally formed with the lower bracket 1, and the protrusion 7 is facing the direction of the shaft head 6.

[0028] As a further improvement, the lower bracket 1 is provided with a plurality of weight-reducing holes to further simplify the lower bracket assembly and meet the lightweight requirements.

[0029] The utility model changes the pin shaft 2 with clearance fit into the pin shaft 2 with interference fit, and increases the diameter of the pin shaft 2 to 25 mm, thereby reducing the stress of the pin shaft 2 under the impact condition of the vehicle; removes the special-shaped protrusion and changes it into a rectangular plate structure to meet the lightweight requirement; at the same time, integrates the height valve bracket mounting hole 5 into the front suspension lower bracket 1 to save space.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy truck cab front suspension lower bracket assembly, characterized in that: It includes a lower bracket, a pin shaft and a fastener; the lower bracket is provided with a through hole, and the pin shaft is interference fit with the through hole; the pin shaft passes through the lower bracket and the outer lower suspension ring of the shock absorber in turn; the fastener is fixed on the pin shaft to press the lower suspension ring of the shock absorber onto the lower bracket.

2. The heavy truck cab front suspension lower bracket assembly as claimed in claim 1, characterized in that: The fasteners include bolts and a limit plate. The end of the pin shaft is provided with a threaded hole along its axial direction. The bolt cooperates with the threaded hole to press the limit plate onto the outer side of the lower lifting ring of the shock absorber.

3. The heavy truck cab front suspension lower bracket assembly as claimed in claim 2, characterized in that: It also includes a shaft head, which is coaxially fixed at the front end of the pin shaft, and the radial dimension of the shaft head is larger than the radial dimension of the pin shaft, and the cross section of the shaft head is non-circular; the diameter of the pin shaft is 25mm, and the diameter of the bolt is 14mm.

4. The heavy truck cab front suspension lower bracket assembly as claimed in claim 2, characterized in that: The lower bracket is provided with a height valve bracket mounting hole.

5. The heavy truck cab front suspension lower bracket assembly as claimed in claim 2, characterized in that: A protrusion facing the shaft head is provided on the upper edge of the lower bracket and connected to the stabilizing rod. The protrusion is a rectangular plate structure, and the protrusion is integrally formed with the lower bracket.

6. The heavy truck cab front suspension lower bracket assembly according to any one of claims 1 to 5, characterized in that: The lower bracket is provided with multiple weight-reducing holes.

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