Cab suspension cushion

Abstract

The utility model belongs to the technical field of cab suspension, and discloses a cab suspension cushion which comprises a suspension body and a mandrel axially arranged in the suspension body, the suspension body comprises a rigid structure coated with an elastic body, the rigid structure is an annular body, one part of the rigid structure is arranged on the outer side of the elastic body to support the elastic body, and the other part of the rigid structure is arranged on the outer side of the elastic body to support the elastic body. The other part is matched and connected with the mounting plate; the suspension body is divided into two parts which are symmetrically distributed through a mounting plate; the mandrel comprises a stop part consistent with the extension direction of the mounting plate and a shaft part connected with the suspension body; the elastic body is of a structure protruding out of the rigid part and is spaced from the stop part. According to the utility model, the original installation of an upper installation plate is canceled, and the mandrel is directly sleeved inside the suspension body, so that the mandrel is fixedly installed on one side of the whole soft cushion structure. And the effect of saving the installation space is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of cab suspension technology, specifically, it relates to a cab suspension pad. Background Technology

[0002] The cab suspension pads are key functional components that reduce vibrations and impacts transmitted to the cab during vehicle operation. They play a crucial role in improving passenger comfort, protecting the cab structure from damage, and enhancing the driving environment.

[0003] With the development of automotive technology, designs now place greater emphasis on lightweighting, compactness, high comfort, and stability. Older cab suspension products struggle to balance comfort and reliability, or are too large and inconvenient to install.

[0004] A search revealed CN217477068U, which discloses a variable stiffness motor suspension device. The device includes a suspension body and a spindle axially disposed within the suspension body. The suspension body comprises a rigid structure covered with an elastic body. This rigid structure includes a stop portion at the open end of the suspension body and a mounting portion on a side away from the open end. The stop portion and the mounting portion are connected by a support portion. The spindle extends from the stop portion into the mounting portion. A variable stiffness adjustment groove is provided within the elastic body near the outer periphery of the stop portion to adjust the variable stiffness of the elastic body. By comprehensively considering the product's use and structural characteristics, the suspension body is divided into three parts: a stop portion, a mounting portion, and a support portion. The variable stiffness adjustment groove at the stop portion provides space for the elastic body of the suspension body to deform under stress.

[0005] However, the above solution requires a large space in the cab, has a large size and structure, and is inconvenient to install. Similar products are not suitable for use in cabs.

[0006] Therefore, there is a need for a cab suspension pad that is easy to install and also ensures reliability and comfort, which has great practical significance and economic value in actual use. Utility Model Content

[0007] The purpose of this utility model is to provide a cab suspension pad to solve the aforementioned problems. This cab suspension pad addresses issues such as the complex structure of the cab, limited installation space, and the lack of working space for simultaneous bolting in both vertical directions for products installed vertically. By employing a threaded design inside the mandrel, pre-assembly is achieved. The product is fixed to the bracket via the base plate, allowing for pre-assembly and locking in one direction. Then, auxiliary bolts can be installed on the other side to ensure a secure installation.

[0008] To achieve the above objectives, this utility model discloses a cab suspension pad, comprising a suspension body and a spindle axially disposed within the suspension body. The suspension body includes a rigid structure covered with an elastic body. The rigid structure is annular, with one part surrounding the outside of the elastic body to support it, and the other part cooperating with and connecting to a mounting plate. The suspension body is divided into two symmetrically distributed parts by the mounting plate. The spindle includes a stop portion extending in the same direction as the mounting plate and a shaft portion connecting the suspension body. The elastic body protrudes from the rigid structure and is spaced apart from the stop portion.

[0009] This utility model's cab suspension pad features a symmetrical structure for the suspension body, with a stop portion on the mandrel aligned with the extending direction of the mounting plate. This simplifies the product structure. The stop portion is equivalent to the upper mounting plate in existing structures, eliminating the need for a separate upper mounting plate. The mandrel is directly fitted inside the suspension body, allowing for installation and fixation on one side of the entire pad structure. This saves installation space.

[0010] The cab suspension pad of this utility model has a rigid structure set in a ring shape. On the one hand, it can provide support for the entire elastic body and improve the load-bearing capacity as the skeleton of the suspension body. On the other hand, it is installed inside the mounting plate and can effectively transmit the force when subjected to vertical force, thereby increasing its installation reliability and service life.

[0011] Furthermore, the mandrel includes a shaft portion with a first through hole at its center, and the inner wall of the first through hole is provided with a threaded structure; a base plate is provided on the side of the shaft portion away from the stop portion, and the mandrel and the base plate connect and fix the suspension body and the mounting plate into one unit. The threaded through hole at the center of the mandrel can cooperate with locking structures such as bolts to effectively fix the mandrel, suspension body, mounting plate, and base plate into one unit. Installation is convenient and highly reliable.

[0012] Furthermore, the mounting plate is provided with mounting through holes; these mounting through holes are coaxially aligned with the center of the shaft. The thickness of the entire mounting plate is uniform to ensure even stress distribution and enhanced reliability.

[0013] Furthermore, the rigid structure is a variable cross-section structure with an outward opening. The rigid structure includes a support portion and a flanged structure. The edge of the opening of the rigid structure is provided with a flanged structure aligned with the extension direction of the mounting plate. The flanged structure and the support portion form a Z-shaped longitudinal section. The flanged structure is designed to limit the deformation of the elastic body. Its outer layer is covered with a rubber body, i.e., an elastic body. When the elastic body inside the rigid structure deforms to a certain extent, this flanged structure acts as a buffer and stop, increasing the overall comfort of the structure.

[0014] Furthermore, the support portion has an L-shaped longitudinal section that fits against the surface of the mounting plate, forming an opening that extends into the mounting through hole. The opening is located on the side of the support portion closest to the mounting through hole on the mounting plate. This opening extends into the mounting through hole and acts as a circumferential limit to prevent circumferential movement. The height of the mounting through hole is greater than twice the thickness of the opening extending into the mounting through hole. The upper and lower suspended bodies are symmetrically arranged, meaning the openings are also symmetrical. A gap exists between the two symmetrical openings to allow for deformation and movement of the upper and lower suspended bodies when the elastic body deforms, ensuring user comfort.

[0015] Furthermore, the center of the elastomer is configured as an arched structure, protruding from the stop and the base plate. In use, when the force is small, the arched structure abuts against the stop and the base plate on both sides, causing the elastomer to deform. The flanged structure is covered with a rubber body.

[0016] Furthermore, the length of the shaft is less than the sum of the thicknesses of the suspension body and the mounting plate. This structure can effectively fix the spindle, suspension body, mounting plate, and base plate into one unit, achieving pre-compression installation.

[0017] Furthermore, the suspension body includes a first suspension body and a second suspension body, the first suspension body and the second suspension body are radially symmetrical along the center of the mounting plate; the stop part is disposed on one side of the first suspension body, and the base plate is disposed on one side of the second suspension body; the stop part and the base plate are coaxially disposed.

[0018] Furthermore, a variable stiffness adjustment groove is provided within the elastic body near the outer periphery of the rigid structure to adjust the stiffness of the elastic body; the volume of the variable stiffness adjustment groove is smaller than the deformation of the elastic body under vertical compression. The variable stiffness adjustment groove provides deformation-accommodating space for the elastic body of the suspended body when subjected to force.

[0019] Furthermore, the stop portion is symmetrically provided with fins along its edge. These fins can serve as supports and clamps when the locking bolts are installed.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] 1. The cab suspension pad of this utility model is easy to install. The thread is designed inside the spindle to achieve pre-installation. That is, the product is fixed to the bracket by the bottom plate. Pre-installation and locking can be achieved in one direction. Then, auxiliary bolts can be installed on the other side to ensure a firm installation effect.

[0022] 2. The cab suspension pad of this utility model is easy to install, ensuring both comfort and reliability. During use, the stiffness of this product generally goes through three stages.

[0023] Phase 1: Within a movement range of approximately 0-2mm, the product's pre-reserved stiffness adjustment groove has gaps, making the rubber easily deformable. This allows the product to move with very low stiffness, providing extremely high comfort under normal working conditions.

[0024] The second stage: within a movement range of about 2-4mm, the stiffness adjustment groove reserved in the product has been filled by deformation. It becomes difficult for the rubber in the rigid structure to deform again, and the stiffness will be improved to a certain extent. As the deformation increases, the stiffness will increase further, providing a reliable and relatively comfortable effect when subjected to impact, especially suitable for bumpy road conditions.

[0025] The third stage: within a range of motion of about 4mm or more, the deformation of the elastomer and the blocking effect of the rubber at the flange work together, and the product stiffness will be rapidly improved, suppressing the occurrence of large deformation to ensure reliability; it is especially suitable for extreme working conditions.

[0026] Therefore, the cab suspension pad of this utility model is a brand-new design that takes into account both comfort and safety, and has broad market prospects. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0028] Figure 1 This is a three-dimensional structural diagram of the cab suspension pad described in this utility model.

[0029] Figure 2 This is a structural schematic diagram of the cab suspension pad of the present invention in its installation state.

[0030] Figure 3 This is a cross-sectional structural diagram of the cab suspension pad described in this utility model.

[0031] Legend: 1-Suspension body, 2-Mandrel, 3-Mounting plate, 10-Elastomer, 11-First suspension body, 12-Second suspension body, 13-Variable stiffness adjustment groove, 20-Rigid structure, 21-Stop part, 22-Shaft part, 23-Base plate, 24-Fin plate, 25-First through hole, 26-Second through hole, 31-Mounting through hole, 201-Support part, 202-Flanged structure, 203-Diameter part, 204-Limiting rubber. Detailed Implementation

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims. Example 1

[0033] like Figure 1 - Figure 3 As shown, the cab suspension pad of this embodiment includes a suspension body 1 and a spindle 2 axially disposed within the suspension body 1. The suspension body 1 includes a rigid structure 20 covering an elastic body 10. The rigid structure 20 is annular, with one part disposed outside the elastic body 10 to support it, and the other part mounted on the mounting surface of the mounting plate 3. Specifically, the rigid structure 20 is a variable cross-section structure with openings at both the top and bottom. The side with the larger opening (flanged structure) faces outward, and the side with the smaller opening (diameter portion) is disposed opposite. The rigid structure 20 includes a support portion 201 and a flanged structure 202. The flanged structure 202 is disposed at the edge of the opening end of the rigid structure 20, and the flanged structure 202 extends in the same direction as the mounting plate 3. The flanged structure 202 and the support portion 201 form a Z-shaped longitudinal section. The flange structure 202 is designed to limit the deformation of the elastomer. The outer layer of the flange structure 202 is covered with limiting rubber 204, which is the elastomer. Preferably, the limiting rubber 204 covering the outer layer of the flange structure has an irregular shape, higher in the middle and lower on both sides. When the elastomer inside the rigid structure deforms to a certain extent, this flange structure acts as a buffer and stop, increasing the overall comfort of the structure.

[0034] Meanwhile, the support part 201 has an L-shaped longitudinal section that fits against the surface of the mounting plate 3. A diameter part 203 is provided on the side of the support part 201 near the mounting through hole 31 of the mounting plate. The diameter part 203 extends into the mounting through hole 31 and plays a limiting role in the circumferential direction. The height of the mounting through hole 31 is more than twice the thickness of the diameter part 203 extending into the mounting through hole 31. The upper and lower suspension bodies are symmetrically arranged, that is, the diameter parts 203 are also symmetrical. During installation, the two symmetrical diameter parts 203 do not directly contact each other and there is a gap, so that when the elastic body deforms, the upper and lower suspension bodies have room for deformation and movement, thus ensuring the comfort of use.

[0035] In addition, the entire rigid structure 20 is equipped with a ring-shaped body, which on the one hand can provide support for the entire elastic body and serve as the skeleton of the suspension body to improve the load-bearing capacity; on the other hand, it is installed inside the mounting plate and effectively transmits the force when subjected to vertical force, thereby increasing its installation reliability and service life.

[0036] In this embodiment, a mounting through hole 31 is provided on the mounting plate 3; the mounting through hole 31 is coaxially arranged with the center of the shaft portion 22. The thickness of the entire mounting plate 3 is uniform to ensure uniform stress distribution and enhance reliability.

[0037] The suspension body 1 is divided into two symmetrically distributed parts by the mounting plate 3; the spindle 2 includes a stop 21 extending in the same direction as the mounting plate 3 and a shaft 22 connecting the suspension body 1; the elastic body 10 protrudes from the rigid structure 20 and is spaced apart from the stop 21. A variable stiffness adjustment groove 13 is provided within the elastic body 10 near the outer periphery of the rigid structure 20 to adjust the stiffness of the elastic body 10; the volume of the variable stiffness adjustment groove 13 is smaller than the deformation of the elastic body 10 under vertical compression. The variable stiffness adjustment groove provides deformation-accommodating space for the elastic body 10 within the suspension body 1 when subjected to force.

[0038] Specifically, the suspension body 1 includes a first suspension body 11 and a second suspension body 12, the first suspension body 11 and the second suspension body 12 are radially symmetrical along the center of the mounting plate 3; a stop part 21 is disposed on one side of the first suspension body 11, and a base plate 23 is disposed on one side of the second suspension body 12; the stop part 21 and the base plate 23 are coaxially disposed.

[0039] In this embodiment, the cab suspension pad has a symmetrical structure for the suspension body 1. The mandrel 2 has a stop 21 that extends in the same direction as the mounting plate 3, simplifying the product structure. The stop 21 is equivalent to the upper mounting plate in the existing structure, thus eliminating the need for the original upper mounting plate. The mandrel is directly sleeved inside the suspension body, allowing for installation and fixation on one side of the entire pad structure. This saves installation space. The stop 21 has symmetrically arranged fins 24 along its edges. The fins 24 can act as supports and clamps when installing the locking bolts.

[0040] The mandrel 2 includes a shaft portion 22 with a first through hole 25 at its center, and the inner wall of the first through hole 25 has a threaded structure. A base plate 23 is provided on the side of the shaft portion 22 away from the stop portion 21. The mandrel 2 and the base plate 23 connect and fix the suspension body 1 and the mounting plate 3 into one unit. At the same time, the base plate 23 has a second through hole 26 at its center. The first through hole 25 and the second through hole 26 are coaxially arranged to ensure stability during installation. The threaded through hole at the center of the mandrel can be used with bolts or other locking structures to effectively fix the mandrel, suspension body, mounting plate, and base plate into one unit. Installation is convenient and highly reliable.

[0041] The center of the elastomer 10 is set as an arched structure, protruding from the stop part 21 and the base plate 23. In use, when the force is small, the arched structure abuts against the stop parts on both sides and the base plate, and the elastomer begins to deform.

[0042] The length of the shaft portion 22 is less than the sum of the thicknesses of the suspension body 1 and the mounting plate 3. This structure can effectively fix the spindle, suspension body, mounting plate, and base plate into one unit to achieve overall pre-assembly.

[0043] This utility model features a driver's cab suspension pad that is easy to install, balancing comfort and reliability. During use, the product's stiffness generally progresses through three stages.

[0044] Phase 1: Within a movement range of approximately 0-2mm, the product's pre-reserved stiffness adjustment groove has gaps, making the rubber easily deformable. This allows the product to move with very low stiffness, providing extremely high comfort under normal working conditions.

[0045] The second stage: within a movement range of about 2-4mm, the stiffness adjustment groove reserved in the product has been filled by deformation. It becomes difficult for the rubber in the rigid structure to deform again, and the stiffness will be improved to a certain extent. As the deformation increases, the stiffness will increase further, providing a reliable and relatively comfortable effect when subjected to impact, especially suitable for bumpy road conditions.

[0046] The third stage: within a range of motion of about 4mm or more, the deformation of the elastomer and the blocking effect of the rubber at the flange work together, and the product stiffness will be rapidly improved, suppressing the occurrence of large deformation to ensure reliability; it is especially suitable for extreme working conditions.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cab suspension cushion comprising a suspension body (1) and a core shaft (2) disposed axially in the suspension body (1), characterized in that, The suspension body (1) includes a rigid structure (20) covering an elastic body (10). The rigid structure (20) is annular, with one part disposed on the outside of the elastic body (10) to support the elastic body (10), and the other part connected to the mounting plate (3). The suspension body (1) is divided into two parts by the mounting plate (3). The spindle (2) includes a stop (21) extending in the same direction as the mounting plate (3) and a shaft (22) connecting the suspension body (1). The elastic body (10) protrudes from the rigid structure (20) and is spaced apart from the stop (21).

2. The cab suspension cushion of claim 1, wherein, The spindle (2) includes a shaft portion (22) with a first through hole (25) in the center, and the inner wall of the first through hole (25) is provided with a threaded structure; a base plate (23) is provided on the side of the shaft portion (22) away from the stop portion (21), and the spindle (2) and the base plate (23) connect and fix the suspension body (1) and the mounting plate (3) into one unit.

3. The cab suspension cushion of claim 2, wherein, The mounting plate (3) is provided with a mounting through hole (31); the mounting through hole (31) is coaxially arranged with the center of the shaft (22).

4. The cab suspension cushion of claim 3, wherein, The rigid structure (20) is a variable cross-section structure with an opening facing outward. The rigid structure (20) includes a support part (201) and a flange structure (202). The edge of the opening end of the rigid structure (20) is provided with a flange structure (202), and the flange structure (202) is consistent with the extension direction of the mounting plate (3). The flange structure (202) and the support part (201) form a Z-shaped longitudinal section.

5. The cab suspension cushion of claim 4, wherein, The support part (201) is an L-shaped longitudinal section that fits on the surface of the mounting plate (3). The support part (201) is provided with a diameter part (203) on the side of the mounting through hole (31) of the mounting plate. The diameter part (203) extends into the mounting through hole (31) and plays a limiting role in the circumferential direction.

6. The cab suspension cushion of claim 4 wherein, The center of the elastomer (10) is set as an arch structure, protruding from the stop (21) and the bottom plate (23); the outer layer of the flange structure (202) is covered with a limiting rubber (204).

7. The cab suspension cushion of claim 6 wherein, The length of the shaft (22) is less than the sum of the thicknesses of the suspension body (1) and the mounting plate (3).

8. The cab suspension cushion of claim 1, wherein, The suspension body (1) includes a first suspension body (11) and a second suspension body (12), the first suspension body (11) and the second suspension body (12) are radially symmetrical along the center of the mounting plate (3); the stop part (21) is disposed on one side of the first suspension body (11), and the base plate (23) is disposed on one side of the second suspension body (12); the stop part (21) and the base plate (23) are coaxially disposed.

9. The cab suspension cushion of claim 8, wherein, A variable stiffness adjustment groove (13) is provided in the elastic body (10) near the outer periphery of the rigid structure (20) to adjust the stiffness of the elastic body (10); the volume of the variable stiffness adjustment groove (13) is smaller than the deformation of the elastic body (10) when it is compressed vertically.

10. The cab suspension cushion of any one of claims 1-9, wherein, The stop part (21) is symmetrically provided with fins (24) on its edge.

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