CN113286954A - Air spring stop structure - Google Patents
Air spring stop structure Download PDFInfo
- Publication number
- CN113286954A CN113286954A CN201980086696.5A CN201980086696A CN113286954A CN 113286954 A CN113286954 A CN 113286954A CN 201980086696 A CN201980086696 A CN 201980086696A CN 113286954 A CN113286954 A CN 113286954A
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- China
- Prior art keywords
- shaft
- shaft insertion
- insertion hole
- air spring
- opposing surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D24/00—Connections between vehicle body and vehicle frame
- B62D24/02—Vehicle body, not intended to move relatively to the vehicle frame, and mounted on vibration absorbing mountings, e.g. rubber pads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/06—Drivers' cabs
- B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
- B62D33/067—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other tiltable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Fluid-Damping Devices (AREA)
- Body Structure For Vehicles (AREA)
Abstract
A landing portion (13) of an air spring (10) has a 1 st contact portion (19), a 1 st opposing surface (20), and a shaft portion (14). The spring support section (30) has: a 2 nd contact part (31) which is in contact with the 1 st contact part (19) in a seated state; a 2 nd opposing face (32) that is separated from and opposes the 1 st opposing face (20); a shaft insertion hole (33); and a shaft movement restricting portion (34) that protrudes from the 2 nd opposing surface (32) so as to define a shaft insertion space (35) that communicates with the shaft insertion hole (33). The shaft part (14) is inserted through the shaft insertion hole (33) and the shaft insertion space (35) in a falling state. The tip of the shaft part (14) which is detached from the shaft insertion hole (33) by the rising of the upper structure from the lowered state moves in the shaft insertion space (35). The tip of the shaft part (14) coming out of the shaft insertion hole (33) enters from the shaft insertion space (35) to the shaft insertion hole (33) due to the lowering of the upper structure to the seated state.
Description
Technical Field
The present disclosure relates to an air spring locking structure of a vehicle in which an air spring is interposed between an upper structure and a lower structure.
Background
The air spring includes: a bellows forming an air chamber and being collapsible; a fixing portion that is provided on an upper end side of the bellows and is fixed to the cab-side bracket; a seating portion provided on a lower end side of the bellows and engaged with the link arm; a shaft portion provided in the seating portion and extending in a contraction direction of the bellows; and a stopper provided on an upper surface of the seating portion. A female screw portion is formed in the seating portion, and the shaft portion is screwed with the female screw portion. The air spring functions in the following manner: by filling air in the bellows in advance, the impact transmitted from the link arm to the cab-side bracket is alleviated. A through hole for inserting the shaft of the air spring is formed in the upper surface of the link arm. The shaft portion includes: a male screw portion screwed with the female screw portion of the seating portion; and a shaft body having an outer diameter larger than that of the male screw portion. A stepped surface is formed at a boundary portion between the male screw portion and the shaft portion main body, and the stepped surface is pressed against a lower end surface of the seating portion by fastening the shaft portion. The gap between the lower end of the shaft and the frame side bracket is t when the lower end surface of the landing part is pressed against the upper surface of the link arm1. The length dimension of the shaft body is L, and the length of the portion of the shaft body protruding from the landing portion is L. When the air pressure in the bellows decreases, there are cases where: wave likeThe tube contracts and the drop portion rises until the stopper comes into contact with the fixing portion. This state is a state in which the landing part is farthest from the link arm. At this time, the distance between the seating portion and the link arm is denoted as t2The length L of the shaft body is set to be larger than t2And is larger. Therefore, even in this case, the lower end portion of the shaft portion is still inserted through the through hole of the link arm, and the shaft portion is prevented from being detached from the link arm.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2017-30411
Disclosure of Invention
Technical problem to be solved by the invention
In the structure of patent document 1, if the height of the shaft portion protruding from the seating portion (the length of the shaft main body) is increased, the gap between the frame-side bracket and the lower end of the shaft portion in a state where the lower end surface of the seating portion is pressed against the upper surface of the link arm (the seating state) is reduced, and therefore the maximum protruding height of the shaft portion is naturally limited to be smaller than the length that interferes with the frame-side bracket. Therefore, depending on the layout of the vehicle, there may be the following: it is difficult to maintain a state in which the shaft portion is inserted through the through hole (air spring locking state) until the seating portion is farthest from the link arm.
Therefore, an object of the present disclosure is to provide an air spring locking structure capable of suppressing an increase in the projection height of a shaft portion and reliably preventing release of an air spring locked state.
Means for solving the problems
In order to achieve the above object, a first aspect of the present disclosure is an air spring locking structure in which an air spring is fixed to an upper structure, the air spring is interposed between the upper structure and a lower structure to elastically support the upper structure in a seated state in which a seating portion of a lower portion of the air spring is placed on a spring support portion on a lower structure side, and the seating portion is moved upward from the seated state together with the upper structure and is separated upward from the spring support portion; in the air spring locking structure, one of the falling portion and the spring support portion has a 1 st contact portion, a 1 st opposing surface and a shaft portion, the 1 st opposing surface intersects with the vertical direction in the falling state, and the shaft portion protrudes from the 1 st opposing surface and extends in the vertical direction. The other of the seating portion and the spring support portion includes: a 2 nd abutting part abutting against the 1 st abutting part in a seated state; a 2 nd opposing surface intersecting the up-down direction in a seated state, and separated from and opposing the 1 st opposing surface; a shaft insertion hole provided in the 2 nd opposing surface; and a shaft movement restricting portion protruding from the 2 nd opposing surface so as to define a shaft insertion space communicating with the shaft insertion hole. The vertical direction in which the shaft portion extends is not limited to the vertical direction, and includes a direction inclined with respect to the vertical direction.
The shaft portion is inserted through the shaft insertion space and the shaft insertion hole in a seated state. The shaft insertion hole and the shaft movement restricting portion allow movement of the shaft portion in a predetermined direction along with the lifting of the upper structure, and restrict movement of the shaft portion in a direction intersecting the predetermined direction. The tip of the shaft portion coming out of the shaft insertion hole due to the rise of the upper structure from the lowered state moves in the shaft insertion space. The tip of the shaft portion coming out of the shaft insertion hole enters the shaft insertion hole from the shaft insertion space due to the lowering of the upper structure to the seated state.
In the above configuration, the shaft portion is inserted through the shaft insertion space and the shaft insertion hole in a seated state in which the seated portion of the lower portion of the air spring is placed on the spring support portion on the lower structure side. This allows movement of the shaft portion in the predetermined direction in accordance with the vertical movement of the upper structure, and maintains the state in which the movement of the shaft portion in the direction intersecting the predetermined direction is restricted (air spring locking state).
When the upper structure is raised from the lowered state and the lowered portion is moved upward (the 1 st abutting portion is separated from the 2 nd abutting portion) away from the spring support portion, the tip of the shaft portion and the shaft insertion space approach each other due to the relative movement of the shaft portion and the shaft insertion hole, and when the upper structure is further raised, the tip of the shaft portion comes out of the shaft insertion hole and moves in the shaft insertion space. After the tip end of the shaft portion is disengaged from the shaft insertion hole, the shaft movement restricting portion restricts movement of the shaft portion in a direction intersecting the predetermined direction, and therefore the air spring locking state is not released and is continuously maintained. In this way, since the shaft insertion hole is substantially extended toward the 1 st opposing surface side by the shaft insertion space, the height of the shaft portion protruding from the 1 st opposing surface can be reduced as compared with a case where the shaft movement restricting portion (shaft insertion space) is not provided. Therefore, the increase in the protruding height of the shaft portion can be suppressed, and the release of the air spring locked state can be reliably prevented.
A 2 nd aspect of the present disclosure is the air spring locking structure of the 1 st aspect, wherein the shaft movement restricting portion has a cylindrical shape defining a shaft insertion space inside.
In the above configuration, since the cylindrical shaft movement restricting portion defines the shaft insertion space inside, when the distal end of the shaft portion is disengaged from the shaft insertion hole and moves in the shaft insertion space, the shaft movement restricting portion can reliably restrict movement of the shaft portion in a direction intersecting the predetermined direction.
A 3 rd aspect of the present disclosure is the air spring locking structure of the 1 st or 2 nd aspect, wherein the shaft portion has a boss portion integrally protruding from the 1 st opposing surface, and a guide pin that is thinner than the boss portion, is detachably fixed to the boss portion, and extends in the vertical direction. The shaft insertion space is large enough for the boss portion to enter, and the shaft insertion hole is large enough for the guide pin to enter and the boss portion to not enter. A tapered guide surface is formed at an end edge of the inner peripheral surface of the shaft insertion hole on the shaft insertion space side, and the tapered guide surface guides a tip end of the guide pin, which moves in the shaft insertion space along with the lowering of the upper structure to the lowered state, to the shaft insertion hole.
In the above configuration, the guide surface can reliably allow the tip end of the guide pin, which has come out of the shaft insertion hole, to enter the shaft insertion hole. Further, since the guide pin is detachably fixed to the boss portion, only the guide pin needs to be replaced when the guide pin is damaged.
Effects of the invention
According to the present disclosure, it is possible to reliably prevent the air spring from being released from the locked state while suppressing an increase in the protruding height of the shaft portion.
Drawings
Fig. 1 is a front view of a cab suspension structure of an embodiment of the present disclosure.
Fig. 2 is an enlarged perspective view of the joint portion of the air spring and the link arm of fig. 1.
Fig. 3 is a sectional view of the cab suspension structure of fig. 1.
Fig. 4 is a cross-sectional view showing a state in which the drop portion of fig. 3 moves upward away from the spring support portion.
Fig. 5 is a perspective view showing the shaft portion, the shaft movement restricting portion, and the shaft insertion hole of fig. 3 in a partial cross section.
Fig. 6A is a cross-sectional view showing a modification of the shaft portion and the shaft movement restricting portion.
Fig. 6B is a perspective view showing another modification of the shaft movement restricting portion.
Detailed Description
Hereinafter, a cab suspension structure 1 according to an embodiment of the present disclosure will be described with reference to the drawings. In the following description, the front-rear direction means the front-rear direction of the vehicle.
As shown in fig. 1 and 2, the cab suspension structure 1 includes: a frame-side bracket 2 attached to a chassis frame (lower structure), not shown, of a tiltable vehicle (truck); a cab-side bracket 3 attached to a cab (upper structure) not shown; a link arm 4 rotatably coupled to both the frame-side bracket 2 and the cab-side bracket 3; and an air spring 10 and a damper 5 provided between the cab-side bracket 3 and the link arm 4. The link arm 4 is provided with a plate-like spring support portion 30, and the air spring 10 is mounted on the plate-like spring support portion 30. The cab is supported by the chassis frame so as to be tiltable (tiltable) diagonally upward and forward about a tilting shaft (not shown).
The damper 5 damps vibration transmitted between the link arm 4 and the cab-side bracket 3 by resisting relative movement of the cab-side bracket 3 and the link arm 4.
As shown in fig. 3 and 4, the air spring 10 includes: a bellows 11 forming an air chamber and being collapsible; a fixing portion 12 provided on an upper end side of the bellows 11 and fixed to the cab-side bracket 3; a seating portion 13 provided on the lower end side of the bellows 11 and placed on the spring support portion 30 of the link arm 4; a shaft portion 14 provided in the seating portion 13 and extending in a contraction direction of the bellows 11; and a stopper 15 provided on an upper surface of the seating portion 13. The air spring 10 functions as an air spring as follows; by filling the bellows 11 with air, the impact transmitted from the link arm 4 to the cab-side bracket 3 is alleviated. When the air pressure in the bellows 11 decreases, the stopper 15 abuts against the fixed portion 12, thereby preventing the approach (interference) of the seating portion 13 and the fixed portion 12.
In this way, the air spring 10 is fixed to the cab, and elastically supports the cab between the cab and the chassis frame in a seated state in which the seating portion 13 of the lower portion of the air spring 10 is placed on the spring support portion 30 on the chassis frame side. When the cab is tilted, the air spring 10 moves upward together with the cab from the seated state, and the seated portion 13 is separated upward from the spring support portion 30.
The seating portion 13 has an "H" -shaped cross section integrally including a cylindrical peripheral wall 16 and a disc-shaped intermediate wall 17, and the entire periphery of the intermediate wall 17 is continuous from the inner peripheral surface of the intermediate portion of the peripheral wall 16. A recess space 18 opened downward is defined by the inner circumferential surface of the circumferential wall 16 and the lower surface of the intermediate wall 17 at the lower portion of the seating portion 13. The annular lower end surface of the peripheral wall 16 constitutes a 1 st contact portion 19, the 1 st contact portion 19 is in contact with and placed on the spring support portion 30 in the seated state, the lower surface of the intermediate wall 17 constitutes a 1 st facing surface 20, and the 1 st facing surface 20 intersects with the vertical direction in the seated state. The shaft portion 14 protrudes from the 1 st opposing surface 20 toward the lower concave space 18 and linearly extends.
The shaft portion 14 has: a columnar boss portion 21 integrally protruding downward from a central portion of the 1 st opposing surface 20; and a guide pin 22 detachably fixed to a lower surface of the boss portion 21 and extending downward. The guide pin 22 is cylindrical and narrower (smaller in outer diameter) than the boss portion 21, and is attached coaxially with the boss portion 21.
In the present embodiment, the guide pin 22 is attached to the boss portion 21 by screwing and fastening the male screw portion 23 formed at the upper end of the guide pin 22 to the female screw hole 24 formed in the boss portion 21. The lower end portion of the guide pin 22 has a shape (for example, a shape of a bolt head of a hexagonal bolt) engageable with a fastening tool.
The upper surface of the spring support portion 30 constitutes a 2 nd abutting portion 31 and a 2 nd opposing surface 32, the 2 nd abutting portion 31 abuts against the 1 st abutting portion 19 of the air spring 10 in the seated state, the 2 nd opposing surface 32 intersects with the vertical direction in the seated state, is separated downward from the 1 st opposing surface 20 of the air spring 10 and opposes it, and an axis insertion hole 33 is provided in the 2 nd opposing surface 32. The shaft insertion hole 33 penetrates the spring support portion 30 in the vertical direction.
As shown in fig. 3 to 5, a cylindrical shaft movement restricting portion 34 is fixed to the 2 nd opposing surface 32. The shaft movement restricting portion 34 is disposed coaxially with the shaft insertion hole 33, extends to protrude upward from the 2 nd opposing surface 32, and is accommodated in the concave space 18 of the positioning portion 13 in the seated state. The inner peripheral surface of the shaft movement restricting portion 34 defines a shaft insertion space 35 (see fig. 4 and 5) communicating with the shaft insertion hole 33. In the seated state, the shaft portion 14 is inserted through the shaft insertion hole 33 and the shaft insertion space 35, and the lower end of the shaft portion 14 protrudes below the spring support portion 30. Further, the shaft movement restricting portion 34 may be provided integrally with the spring support portion 30.
The inner diameter of the shaft movement restricting portion 34 is slightly larger than the outer diameter of the boss portion 21, and the inner diameter of the shaft insertion hole 33 is slightly larger than the outer diameter of the guide pin 22 and smaller than the outer diameter of the boss portion 21. That is, the shaft insertion space 35 has a size that allows the boss portion 21 to enter, and the shaft insertion hole 33 has a size that allows the guide pin 22 to enter and prevents the boss portion 21 from entering. A tapered guide surface 36 that expands the diameter of the shaft insertion space 35 is formed at the upper end edge of the inner peripheral surface of the shaft insertion hole 33 (the end edge on the shaft insertion space 35 side).
The height of the boss portion 21 protruding from the 1 st opposing surface 20 is set to be equal to or less than the height of the peripheral wall 16 protruding from the 1 st opposing surface 20 (the height from the 1 st opposing surface 20 to the 1 st abutting portion 19) so that the boss portion 21 does not interfere with the 2 nd opposing surface 32 in the seated state where the 1 st abutting portion 19 abuts against the 2 nd abutting portion 31. The height of the shaft portion 14 protruding from the 1 st opposing surface 20 (the height from the 1 st opposing surface 20 to the lower end of the guide pin 22) is set to a height at which the lower end of the shaft portion 14 (guide pin 22) protruding downward of the spring support portion 30 in the seated state does not interfere with surrounding components (e.g., the frame-side bracket 2). Further, the height at which the shaft movement restricting portion 34 protrudes from the 2 nd opposing face 32 is set to be equal to or less than the height at which the peripheral wall 16 protrudes from the 1 st opposing face 20, so that the upper end of the shaft movement restricting portion 34 does not interfere with the 1 st opposing face 20 in the seated state.
The shaft insertion hole 33 and the shaft movement restricting portion 34 (shaft insertion space 35) allow the shaft portion 14 to reciprocate in a predetermined direction in accordance with the elevation of the cab, and restrict the movement of the shaft portion 14 in a direction intersecting the predetermined direction. Further, for example, when the cab is raised as in the case where the cab is tilted, the air spring 10 moves upward together with the cab from the seated state, the seated portion 13 is separated upward from the spring support portion 30, and the lower end of the shaft portion 14 (the lower end of the guide pin 22) is disengaged from the shaft insertion hole 33, the lower end of the shaft portion 14 moves upward in the shaft insertion space 35. Conversely, when the cab is lowered from the tilted state, the lower end of the shaft portion 14 that has come out of the shaft insertion hole 33 enters from the shaft insertion space 35 to the shaft insertion hole 33 due to the lowering of the air spring 10 to the seated state. The guide surface 36 guides the lower end of the guide pin 22 to the shaft insertion hole 33, and the guide pin 22 descends in the shaft insertion space 35 in association with the descent to the seated state.
According to the present embodiment, in the seated state, since the shaft portion 14 is inserted through the shaft insertion space 35 and the shaft insertion hole 33, the following state (air spring locking state) is maintained: the shaft 14 is allowed to move in a predetermined direction in accordance with the elevation of the cab, and the movement of the shaft 14 in a direction intersecting the predetermined direction is restricted.
When the cab is raised from the lowered state and the lowered portion 13 moves upward away from the spring support portion 30 (the 1 st contact portion 19 moves away from the 2 nd contact portion 31), the lower end of the shaft portion 14 approaches the shaft insertion space 35 due to the raising of the shaft portion 14, and when the cab is further raised, the lower end of the shaft portion 14 comes out of the shaft insertion hole 33 and moves in the shaft insertion space 35. After the lower end of the shaft portion 14 is disengaged from the shaft insertion hole 33, the shaft movement restricting portion 34 restricts movement of the shaft portion 14 in a direction intersecting the predetermined direction, and therefore the air spring locking state is not released but is continuously maintained. In this way, since the shaft insertion hole 33 is substantially extended upward (toward the 1 st opposing surface 20) by the shaft insertion space 35, the height of the shaft portion 14 protruding from the 1 st opposing surface 20 can be reduced as compared with a case where the shaft movement restricting portion 34 (the shaft insertion space 35) is not provided. Therefore, it is possible to suppress an increase in the protruding height of the shaft portion 14 and reliably prevent the release of the air spring locked state.
Since the cylindrical shaft movement restricting portion 34 defines the shaft insertion space 35 inside, when the lower end of the shaft portion 14 comes out of the shaft insertion hole 33 and moves in the shaft insertion space 35, the movement of the shaft portion 14 in the direction intersecting the predetermined direction can be reliably restricted by the shaft movement restricting portion 34.
Since the shaft portion 14 is configured by the boss portion 21 and the guide pin 22, and the guide pin 22 is detachably fixed to the boss portion 21, only the guide pin 22 needs to be replaced when the guide pin 22 is damaged.
Further, since the tapered guide surface 36 is provided at the upper end edge of the inner peripheral surface of the shaft insertion hole 33, the lower end of the guide pin 22 that has come out of the shaft insertion hole 33 can be reliably made to enter the shaft insertion hole 33 by the guide surface 36.
Although the present disclosure has been described above based on the above embodiments, the present disclosure is not limited to the contents of the above embodiments, and it goes without saying that appropriate modifications can be made without departing from the scope of the present disclosure. That is, it is needless to say that other embodiments, examples, application techniques, and the like, which are completed based on the present embodiment by those skilled in the art, are all included in the scope of the present disclosure.
For example, in the above embodiment, the 1 st contact portion 19, the 1 st opposing surface 20, and the shaft portion 14 are provided in the seating portion 13, and the 2 nd contact portion 31, the 2 nd opposing surface 32, the shaft insertion hole 33, and the shaft movement restricting portion 34 (shaft insertion space 35) are provided in the spring support portion 30, but on the contrary, the 2 nd contact portion, the 2 nd opposing surface, the shaft insertion hole, and the shaft movement restricting portion (shaft insertion space) may be provided in the seating portion, and the 1 st contact portion, the 1 st opposing surface, and the shaft portion may be provided in the spring support portion.
The forms of the shaft portion 14, the shaft insertion hole 33, the shaft movement restricting portion 34, and the shaft insertion space 35 are not limited to the present embodiment, and can be set arbitrarily. For example, as shown in fig. 6A, the guide pin 25 having substantially the same thickness (substantially the same outer diameter) as the boss portion 21 may be attached to the boss portion 21, and the inner diameter of the shaft insertion hole 33 may be set substantially equal to the inner diameter of the shaft insertion space 35. In this case, the lower end of the guide pin 25 that descends from the shaft insertion space 35 can be reliably inserted into the shaft insertion hole 33 without providing a tapered surface. As shown in fig. 6B, the shaft movement restricting portion 37 may be formed by a plurality of (e.g., 3) rod-shaped bodies or tube-shaped bodies linearly extending from the upper end peripheral edge of the shaft insertion hole 33 (guide surface 36). In this case, the region surrounded by the 3 shaft movement restricting portions 37 becomes the shaft insertion space 38.
The present application is based on the japanese patent application published on 27/12/2018 (japanese application 2018-243893), the content of which is incorporated herein by reference.
Industrial applicability
The present disclosure can be applied to a vehicle including an air spring interposed between an upper structure and a lower structure.
Description of the reference numerals
1: cab suspension structure
2: side bracket of frame
3: cab side bracket
4: link arm
5: shock absorber
10: air spring
11: corrugated pipe
12: fixing part
13: landing part
14: shaft part
15: stop piece
16: peripheral wall
17: intermediate wall
18: concave space
19: 1 st abutting part
20: 1 st opposite face
21: boss part
22. 25: guide pin
23: male thread part
24: female screw hole
30: spring support
31: 2 nd abutting part
32: 2 nd opposite face
33: shaft insertion through hole
34. 37: shaft movement restricting part
35. 38: space for inserting shaft
36: guide surface
Claims (3)
1. An air spring stop structure, wherein,
an air spring fixed to an upper structure, the air spring being interposed between the upper structure and a lower structure in a seated state in which a seated portion of a lower portion of the air spring is placed on a spring support portion on a lower structure side, the upper structure being elastically supported, the seated portion being separated upward from the spring support portion because the air spring moves upward from the seated state together with the upper structure;
the air spring clamping structure is characterized in that,
one of the seating portion and the spring support portion has a 1 st contact portion, a 1 st opposing surface that intersects the vertical direction in the seated state, and a shaft portion that protrudes from the 1 st opposing surface and extends in the vertical direction;
the other of the seating portion and the spring support portion has a 2 nd abutting portion, a 2 nd opposing surface, a shaft insertion hole, and a shaft movement restricting portion, the 2 nd abutting portion abutting the 1 st abutting portion in the seated state, the 2 nd opposing surface intersecting with the vertical direction in the seated state and being spaced apart from and opposing the 1 st opposing surface, the shaft insertion hole being provided in the 2 nd opposing surface, the shaft movement restricting portion protruding from the 2 nd opposing surface so as to define a shaft insertion space communicating with the shaft insertion hole;
the shaft portion is inserted through the shaft insertion space and the shaft insertion hole in the seated state;
the shaft insertion hole and the shaft movement restricting portion allow the shaft portion to move in a predetermined direction in accordance with the lifting of the upper structure, and restrict the shaft portion from moving in a direction intersecting the predetermined direction;
the tip of the shaft portion coming out of the shaft insertion hole as the upper structure is raised from the lowered state moves in the shaft insertion space;
the tip of the shaft portion coming out of the shaft insertion hole is lowered by the upper structure to the lowered state, and enters the shaft insertion hole from the shaft insertion space.
2. The air spring stop structure of claim 1,
the shaft movement restricting portion has a cylindrical shape defining the shaft insertion space therein.
3. The air spring retaining structure according to claim 1 or 2,
the shaft portion has a boss portion integrally protruding from the 1 st opposing surface, and a guide pin that is thinner than the boss portion, is detachably fixed to the boss portion, and extends in the vertical direction;
the shaft insertion space is the size of the boss part which can enter;
the shaft insertion hole is sized such that the guide pin can enter and the boss portion cannot enter;
a tapered guide surface that guides a distal end of the guide pin, which moves in the shaft insertion space as the upper structure descends to the seated state, to the shaft insertion hole is formed at an end edge of the inner peripheral surface of the shaft insertion hole on the shaft insertion space side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018243893A JP7153232B2 (en) | 2018-12-27 | 2018-12-27 | Air spring locking structure |
| JP2018-243893 | 2018-12-27 | ||
| PCT/JP2019/050759 WO2020138141A1 (en) | 2018-12-27 | 2019-12-25 | Air spring locking structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113286954A true CN113286954A (en) | 2021-08-20 |
| CN113286954B CN113286954B (en) | 2023-03-21 |
Family
ID=71129423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980086696.5A Active CN113286954B (en) | 2018-12-27 | 2019-12-25 | Air spring stop structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7153232B2 (en) |
| CN (1) | CN113286954B (en) |
| WO (1) | WO2020138141A1 (en) |
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| JPS6020977U (en) * | 1983-07-22 | 1985-02-13 | 日産ディーゼル工業株式会社 | Tilt cap locking device |
| JP2004090865A (en) * | 2002-09-03 | 2004-03-25 | Hino Motors Ltd | Attachment structure of air spring for cab |
| JP2005212759A (en) * | 2004-02-02 | 2005-08-11 | Nissan Diesel Motor Co Ltd | Air spring mounting structure and its mounting method |
| CN202080356U (en) * | 2011-05-10 | 2011-12-21 | 北汽福田汽车股份有限公司 | Cab post-suspension system and heavy-duty vehicle |
| CN104913001A (en) * | 2014-03-10 | 2015-09-16 | 东洋橡胶工业株式会社 | Shaft spring |
| CN105736626A (en) * | 2014-12-26 | 2016-07-06 | 东洋橡胶工业株式会社 | Air spring |
| JP2017030411A (en) * | 2015-07-29 | 2017-02-09 | いすゞ自動車株式会社 | Joint structure of air spring |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2570234Y2 (en) * | 1992-08-21 | 1998-05-06 | 日野自動車工業株式会社 | Cab suspension system |
| US5921532A (en) | 1994-10-07 | 1999-07-13 | Neway Anchorlok International, Inc. | Air spring with internal support member |
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2018
- 2018-12-27 JP JP2018243893A patent/JP7153232B2/en active Active
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2019
- 2019-12-25 CN CN201980086696.5A patent/CN113286954B/en active Active
- 2019-12-25 WO PCT/JP2019/050759 patent/WO2020138141A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6020977U (en) * | 1983-07-22 | 1985-02-13 | 日産ディーゼル工業株式会社 | Tilt cap locking device |
| JP2004090865A (en) * | 2002-09-03 | 2004-03-25 | Hino Motors Ltd | Attachment structure of air spring for cab |
| JP2005212759A (en) * | 2004-02-02 | 2005-08-11 | Nissan Diesel Motor Co Ltd | Air spring mounting structure and its mounting method |
| CN202080356U (en) * | 2011-05-10 | 2011-12-21 | 北汽福田汽车股份有限公司 | Cab post-suspension system and heavy-duty vehicle |
| CN104913001A (en) * | 2014-03-10 | 2015-09-16 | 东洋橡胶工业株式会社 | Shaft spring |
| CN105736626A (en) * | 2014-12-26 | 2016-07-06 | 东洋橡胶工业株式会社 | Air spring |
| JP2017030411A (en) * | 2015-07-29 | 2017-02-09 | いすゞ自動車株式会社 | Joint structure of air spring |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7153232B2 (en) | 2022-10-14 |
| CN113286954B (en) | 2023-03-21 |
| WO2020138141A1 (en) | 2020-07-02 |
| JP2020104630A (en) | 2020-07-09 |
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