Cab mount

Abstract

The present invention comprises: an outer cylinder 11 attached to a vehicle body frame F; an inner cylinder 12 inserted inside the outer cylinder and attached to a cab C; a body rubber (13) that connects the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder to each other; and an adjustment member 14 attached to the upper end opening edge of the outer cylinder and protruding radially inward from the inner circumferential surface of the outer cylinder with a radial gap left between the adjustment member 14 and the outer circumferential surface of the inner cylinder.

Description

Technical Field

[0001] The present disclosure relates to a cab mount. Background Art

[0002] As shown in the following patent document (PTL) 1, a conventionally known cab mounting member includes an outer tube attached to a vehicle body frame, an inner tube inserted inside the outer tube and attached to the cab, and a body rubber member connecting the inner circumference of the outer tube and the outer circumference of the inner tube.

[0003] Citation List

[0004] Patent Literature

[0005] Patent Document 1: JP2008-175333A Summary of the invention

[0006] (Technical Issues)

[0007] However, in the above-mentioned conventional cab mount, when a large load is applied due to, for example, a vehicle collision or other reasons, and the outer cylinder and the inner cylinder are significantly displaced relative to each other in the radial direction, an adjustment member provided between the outer cylinder and the inner cylinder adjusts the displacement, thereby causing a risk of deterioration in vibration damping performance during normal driving.

[0008] The present disclosure is made under such circumstances. It would be helpful to provide a cab mounting member capable of adjusting the relative displacement between an outer cylinder and an inner cylinder in the radial direction when a large load is applied without reducing the vibration damping performance.

[0009] (Solution to the problem)

[0010] In order to solve the above problems and achieve such objectives, a cab mounting member according to the present disclosure includes:

[0011] an outer barrel configured to be attached to a vehicle body frame;

[0012] an inner cylinder configured to be inserted inside the outer cylinder and attached to the cab;

[0013] a body rubber member configured to connect the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder to each other; and

[0014] An adjustment member is configured to be attached to the upper end opening edge of the outer tube, the adjustment member is configured to be arranged to protrude radially inward from the inner peripheral surface of the outer tube, and a radial gap is left between the adjustment member and the outer peripheral surface of the inner tube.

[0015] (Beneficial Effects)

[0016] According to the present disclosure, it is possible to adjust the relative displacement between the outer cylinder and the inner cylinder in the radial direction without deteriorating the vibration damping performance when a large load is applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached picture:

[0018] Figure 1 is a longitudinal sectional view of a cab mounting member illustrated as a first embodiment;

[0019] Figure 2 is from Figure 1 A cross-sectional view as viewed from arrow II-II;

[0020] Figure 3A is an example Figure 1 A diagram of a method of manufacturing a cab mounting member as shown;

[0021] Figure 3B is an example Figure 1 A diagram of a method of manufacturing a cab mounting member as shown;

[0022] Figure 3C is an example Figure 1 A diagram of a method of manufacturing a cab mounting member as shown;

[0023] Figure 3D is an example Figure 1 A diagram of a method of manufacturing a cab mounting member as shown;

[0024] Figure 4 is a longitudinal sectional view of a cab mounting member illustrated as a second embodiment;

[0025] Figure 5 is a longitudinal sectional view of a cab mounting member illustrated as a third embodiment; and

[0026] Figure 6 is from Figure 5 A cross-sectional view as viewed along arrows VI-VI. DETAILED DESCRIPTION

[0027] The following will refer to Figure 1 and Figure 2 A first embodiment of a cab mount is described.

[0028] The cab mounting member 1 includes an outer tube 11 , an inner tube 12 , a body rubber member 13 and an adjustment member 14 .

[0029] The outer cylinder 11 and the inner cylinder 12 are coaxially arranged with a central axis O extending in the vertical direction. Hereinafter, a direction intersecting the central axis O when viewed in the vertical direction is referred to as a radial direction, and a direction circumferentially around the central axis O is referred to as a circumferential direction.

[0030] A first flange 17 is formed at the upper end of the outer cylinder 11, protruding outward in the radial direction and continuously extending through the entire length in the circumferential direction. The outer cylinder 11 is attached to the vehicle body frame F via the first flange 17. The lower surface of the first flange 17 is supported by the vehicle body frame F.

[0031] The inner cylinder 12 is inserted into the inner side of the outer cylinder 11 and attached to the installation wall of the cab C. Both ends of the inner cylinder 12 in the vertical direction protrude from the outer cylinder 11 to both sides in the vertical direction, respectively.

[0032] The mounting plate 15 is provided at the upper end of the inner cylinder 12. The mounting plate 15 includes a fitting tube 15a fitted into the upper end of the inner cylinder 12, and a second flange 15b protruding outward in the radial direction from the upper end of the fitting tube 15a and extending continuously in the circumferential direction over the entire length. The second flange 15b straddles the upper end opening edge of the inner cylinder 12 in the radial direction. The inner cylinder 12 is attached to the mounting wall of the cab C via the second flange 15b. The upper surface of the second flange 15b is supported by the lower surface of the mounting wall of the cab C. The fixing bolt B is integrally inserted into the inner side of each of the mounting plate 15 and the inner cylinder 12. Note that the mounting plate 15 may not be provided.

[0033] A support plate 16 is provided at the lower end of the inner tube 12. The lower end opening edge of the inner tube 12 contacts the upper surface of the support plate 16. The fixing bolt B penetrates the support plate 16 and the mounting wall of the cab C in the vertical direction. The fixing bolt B is a bolt having a head. The head is supported on the upper surface of the mounting wall of the cab C, and the lower end of the fixing bolt B protrudes downward from the support plate 16. By screwing a nut N onto the lower end of the fixing bolt B, the inner tube 12 is fixed by being clamped between the support plate 16 and the mounting wall of the cab C in the vertical direction.

[0034] The body rubber member 13 connects the inner circumferential surface of the outer cylinder 11 and the outer circumferential surface of the inner cylinder 12 to each other. The body rubber member 13 is vulcanized and attached to the inner circumferential surface of the outer cylinder 11 and the outer circumferential surface of the inner cylinder 12. The body rubber member 13 is formed in a cylindrical shape and is arranged coaxially with the central axis O. The upper end opening edge of the body rubber member 13 is located at the same height or below the upper surface of the first flange 17 in the vertical direction.

[0035] The adjustment member 14 protrudes radially inwardly from the inner circumferential surface of the outer cylinder 11 , and is attached to the upper end opening edge of the outer cylinder 11 with a radial gap left between the adjustment member 14 and the outer circumferential surface of the inner cylinder 12 .

[0036] The adjustment member 14 is formed in a plate shape and is preferably formed of a material having a higher tensile strength than the material forming the outer tube 11 .

[0037] The adjustment member 14 is penetrated by the inner cylinder 12 in the vertical direction. The adjustment member 14 has an inner circumferential surface 14a surrounding the entire circumference of the outer circumferential surface of the inner cylinder 12. The inner circumferential surface 14a of the adjustment member 14 and the outer circumferential surface of the inner cylinder 12 are both circular when viewed in the vertical direction. The radial gap between the inner circumferential surface 14a of the adjustment member 14 and the outer circumferential surface of the inner cylinder 12 is constant over the entire length in the circumferential direction. The inner circumferential surface 14a of the adjustment member 14 is located on the inner side of the outer circumferential surface of the second flange 15b of the mounting plate 15 in the radial direction. The adjustment member 14 and the main body rubber member 13 are arranged in a non-bonded state. The lower surface of the adjustment member 14 contacts the upper end opening edge of the main body rubber member 13. It should be noted that the lower surface of the adjustment member 14 can also be separated from the upper end opening edge of the main body rubber member 13.

[0038] Here, the first flange 17 of the outer cylinder 11 is provided with a latching piece 18, which fixes the adjustment member 14 on the upper end opening edge of the outer cylinder 11 and the upper surface of the first flange 17. A plurality of latching pieces 18 are arranged at intervals in the circumferential direction. The latching pieces 18 are formed integrally with the first flange 17, and are folded inwardly in the radial direction to cover the upper end opening edge of the outer cylinder 11, so that the latching pieces 18 capture and fix the adjustment member 14 between each latching piece 18 and the upper end opening edge of the outer cylinder 11 and the upper surface of the first flange 17 in the vertical direction. The latching piece 18 is located below the lower surface of the second flange 15b of the mounting plate 15.

[0039] Note that the latch piece 18 may not be provided in the first flange 17 , and the adjustment member 14 may be attached to the upper end opening edge of the outer cylinder 11 , for example, by welding or using fastening members such as bolts.

[0040] A method of manufacturing the cab mounting member 1 configured as described above will be described.

[0041] First, if Figure 3A and Figure 3B As shown, the body rubber member 13 is vulcanized and molded by injecting unvulcanized rubber using the outer cylinder 11 and the inner cylinder 12 as inserts, and the body rubber member 13 is vulcanized and adhered to the inner circumferential surface of the outer cylinder 11 and the outer circumferential surface of the inner cylinder 12 .

[0042] At this time, the outer cylinder 11 is provided with a planned shaping piece 18a for the latch piece 18. The planned shaping piece 18a is formed in a flat plate shape extending vertically upward from the first flange 17.

[0043] Then, if Figure 3C and Figure 3DAs shown, while the inner cylinder 12 is inserted into the inner side of the adjustment member 14 from above the inner cylinder 12, the adjustment member 14 is placed on the upper end opening edge of the outer cylinder 11 and the upper surface of the first flange 17. Then, the planned forming piece 18a for the latch piece 18 is folded inwardly in the radial direction to cover the upper end opening edge of the outer cylinder 11, forming the latch piece 18, so that the latch piece 18 captures and fixes the adjustment member 14 between each latch piece 18 and the upper end opening edge of the outer cylinder 11 and the upper surface of the first flange 17 in the vertical direction.

[0044] Then, if Figure 1 and Figure 2 As shown, the mounting plate 15 is attached to the inner tube 12 by fitting the fitting pipe 15 a to the upper end of the inner tube 12 and placing the second flange 15 b on the upper end opening edge of the inner tube 12 .

[0045] As described above, in the cab mounting member 1 according to the present embodiment, the adjustment member 14 protrudes inward in the radial direction from the inner peripheral surface of the outer cylinder 11 and is attached to the upper end opening edge of the outer cylinder 11, leaving a radial gap between the adjustment member 14 and the outer peripheral surface of the inner cylinder 12. Therefore, the inner cylinder 12 can collide with the adjustment member 14 only when a large load is applied, so that the relative displacement between the outer cylinder 11 and the inner cylinder 12 in the radial direction can be adjusted without deteriorating the vibration damping performance during normal driving.

[0046] Since the adjustment member 14 and the body rubber member 13 are arranged in a non-bonded state, it is possible to prevent the elastic deformation of the body rubber member 13 from being suppressed by the adjustment member 14 when vibration is applied, thereby achieving the designed vibration damping performance.

[0047] Since the mounting plate 15 having the second flange 15b is separated from the inner tube 12, it is not necessary to insert the second flange 15b into the inner side of the adjustment member 14 when manufacturing the cab mounting part 1. Therefore, the diameter of the inner peripheral surface 14a of the adjustment member 14 can be made smaller than the outer diameter of the second flange 15b, thereby reducing the bulkiness of the adjustment member 14.

[0048] Next, we will refer to Figure 4 A cab mounting member 2 according to a second embodiment of the present disclosure is described.

[0049] In this second embodiment, the same reference numerals are given to the same components as those of the first embodiment, and description thereof is omitted. Only the differences are described.

[0050] In this embodiment, a rib 21 protruding in the vertical direction is provided at the radially inner end of the adjustment member 14. The rib 21 protrudes downward from the opening periphery of the inner peripheral surface 14a in the lower surface of the adjustment member 14. The rib 21 is formed integrally with the adjustment member 14.

[0051] A recessed portion 22, which is recessed downward and into which the rib 21 is inserted, is formed at the upper end opening edge of the body rubber member 13. The plurality of ribs 21 and the plurality of recessed portions 22 are provided at intervals in the circumferential direction.

[0052] As described above, the cab mount 2 according to this embodiment is provided with the rib 21 protruding in the vertical direction at the radial inner end of the adjustment member 14. Therefore, the rigidity of the adjustment member 14 can be ensured against the impact force applied in the radial direction from the inner tube 12 to the adjustment member 14.

[0053] Next, we will refer to Figure 5 and Figure 6 A cab mounting member 3 according to a third embodiment of the present disclosure is described.

[0054] In this third embodiment, the same reference numerals are given to the same components as those of the first embodiment, and description thereof will be omitted. Only the differences will be described.

[0055] In this embodiment, a rib 23 protruding in the vertical direction is provided at the radially inner end of the adjustment member 24. The rib 23 protrudes upward from the opening periphery of the inner peripheral surface 24a in the upper surface of the adjustment member 24. The rib 23 extends continuously over the entire length in the circumferential direction. The rib 23 is formed integrally with the adjustment member 24. The adjustment member 24 is attached to the vehicle body frame F together with the first flange 17 of the outer tube 11 using the same bolts.

[0056] When viewed in the vertical direction, the inner peripheral surface 24a of the adjustment member 24 presents an elliptical shape. The inner peripheral surface 24a of the adjustment member 24 is arranged coaxially with the central axis O. The outer peripheral surface of the inner cylinder 12 is circular when viewed in the vertical direction. The distance in the radial direction between the inner peripheral surface 24a of the adjustment member 24 and the outer peripheral surface of the inner cylinder 12 is the largest in the major axis direction of the inner peripheral surface 24a of the adjustment member 24 when viewed in the vertical direction, and the smallest in the minor axis direction of the inner peripheral surface 24a of the adjustment member 24.

[0057] The cab mount 3 is attached to the vehicle in such a manner that the gap between the inner peripheral surface 24a of the adjustment member 24 and the outer peripheral surface of the inner tube 12 is narrowest in the front-rear direction of the vehicle. In other words, the cab mount 3 is attached to the vehicle in such an orientation that the minor axis direction of the inner peripheral surface 24a of the adjustment member 24 coincides with the front-rear direction of the vehicle when viewed in the vertical direction.

[0058] As described above, the cab mount 3 according to this embodiment is provided with the rib 23 protruding in the vertical direction at the radial inner end of the adjustment member 24. Therefore, the adjustment member 24 can resist the impact force applied to the adjustment member 24 in the radial direction from the inner tube 12, and the rigidity of the adjustment member 24 is ensured.

[0059] The cab mounting member 3 is attached to the vehicle in such a manner that the gap between the inner peripheral surface 24a of the adjustment member 24 and the outer peripheral surface of the inner cylinder 12 is narrowest in the front-rear direction of the vehicle, thereby ensuring that the relative movement amount in the lateral direction (vehicle width direction) between the outer cylinder 11 (vehicle body frame F) and the inner cylinder 12 (cab C) can become relatively large in the radial direction.

[0060] The scope of the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present disclosure.

[0061] For example, the adjustment member 14 or 24 may adopt a structure composed of plates disposed at intervals in the circumferential direction without having any inner peripheral surface 14 a or 24 a surrounding the entire circumference of the outer peripheral surface of the inner cylinder 12 .

[0062] The inner diameter of the inner tube 12 or the inner diameter of the fitting tube 15a can be changed as the position changes up and down, so that the fixing bolt B moves the inner tube 12 at a desired timing.

[0063] Furthermore, within the scope not departing from the gist of the present disclosure, the components in the above-described embodiments may be replaced with known components as appropriate, and the above-described embodiments and modifications may be combined as appropriate.

[0064] For example, aspects of the present disclosure are as follows.

[0065] <1>

[0066] A cab mounting component, comprising:

[0067] an outer barrel configured to be attached to a vehicle body frame;

[0068] an inner cylinder configured to be inserted inside the outer cylinder and attached to the cab;

[0069] a body rubber member configured to connect the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder to each other; and

[0070] The adjustment member is configured to be attached to the upper end opening edge of the outer tube, and is configured to be arranged to protrude inwardly in the radial direction than the inner peripheral surface of the outer tube, and a gap is left in the radial direction between the adjustment member and the outer peripheral surface of the inner tube.

[0071] <2>

[0072] according to <1> The cab mounting member, wherein the adjustment member is configured to be arranged in a non-bonded state with the main body rubber member.

[0073] <3>

[0074] according to <1> or <2> The cab mounting member, wherein

[0075] The adjustment member is configured to have an inner peripheral surface surrounding the entire circumference of the outer peripheral surface of the inner tube,

[0076] The cab mount is configured to be attached to the vehicle in such a manner that a gap between an inner peripheral surface of the adjustment member and an outer peripheral surface of the inner tube is narrowest in a front-rear direction of the vehicle.

[0077] <4>

[0078] according to <1> to <3> The cab mounting member described in any one of the above, wherein the adjustment member is provided with a rib at an inner end in the radial direction, the rib protruding in the vertical direction.

[0079] <5>

[0080] according to <1> to <4> The cab mounting member as described in any one of the preceding claims, wherein

[0081] The fitting tube is fitted into the upper end of the inner tube;

[0082] The fixing bolt is integrally inserted into the inner side of each of the inner tube and the fitting tube.

[0083] The inner diameter of the inner cylinder or the inner diameter of the fitting tube changes as the position changes up and down.

[0084] Reference numerals list

[0085] 1, 2, 3 Cab mounting parts

[0086] 11 outer cylinder

[0087] 12 Inner tube

[0088] 13 Main rubber parts

[0089] 14, 24 Adjustment components

[0090] 14a, 24a Inner circumference

[0091] 21, 23 ribs

[0092] C Cab

[0093] F Body frame

Claims

1. A cab mounting member, comprising: an outer barrel configured to be attached to a vehicle body frame; an inner cylinder configured to be inserted into the inner side of the outer cylinder and attached to the cab; a body rubber member configured to connect the inner circumferential surface of the outer cylinder and the outer circumferential surface of the inner cylinder to each other; and An adjustment member is attached to the upper end opening edge of the outer tube, the adjustment member is arranged to protrude inwardly in the radial direction than the inner peripheral surface of the outer tube, and a gap is left in the radial direction between the adjustment member and the outer peripheral surface of the inner tube.

2. The cab mounting member according to claim 1, wherein: The adjustment member is configured to be disposed in a non-bonded state with the main rubber member.

3. The cab mounting according to claim 1 or 2, wherein The adjustment member is configured to have an inner peripheral surface surrounding the entire circumference of the outer peripheral surface of the inner tube, The cab mount is configured to be attached to the vehicle in such a manner that a gap between the inner peripheral surface of the adjustment member and the outer peripheral surface of the inner tube is narrowest in the front-rear direction of the vehicle.

4. The cab mounting member according to claim 1 or 2, wherein: The adjustment member is provided at an inner end in the radial direction with a rib configured to protrude in a vertical direction.

5. The cab mounting according to claim 1 or 2, wherein The fitting tube is fitted into the upper end of the inner tube. A fixing bolt is integrally inserted into the inner side of each of the inner tube and the fitting tube, and The inner diameter of the inner cylinder or the inner diameter of the fitting tube changes as the position changes up and down.

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