CN110936972A - Anti-axial-movement method for anti-side-rolling torsion bar assembly and anti-side-rolling torsion bar assembly - Google Patents
Anti-axial-movement method for anti-side-rolling torsion bar assembly and anti-side-rolling torsion bar assembly Download PDFInfo
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- CN110936972A CN110936972A CN201911133948.3A CN201911133948A CN110936972A CN 110936972 A CN110936972 A CN 110936972A CN 201911133948 A CN201911133948 A CN 201911133948A CN 110936972 A CN110936972 A CN 110936972A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
- B61F5/22—Guiding of the vehicle underframes with respect to the bogies
- B61F5/24—Means for damping or minimising the canting, skewing, pitching, or plunging movements of the underframes
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Abstract
The invention discloses an axial float prevention method for a side-rolling resistant torsion bar and the side-rolling resistant torsion bar, wherein the axial float prevention method is characterized in that one end of a first steel sleeve is provided with a first annular limiting part, one end of a second steel sleeve is provided with a second annular limiting part, one end of a first supporting seat is provided with a third annular limiting part, one end of the second supporting seat is provided with a fourth annular limiting part, a first supporting spherical hinge is positioned between the third annular limiting part and the first annular limiting part, and a second supporting spherical hinge is positioned between the second annular limiting part and the fourth annular limiting part; when one side of the torsion bar shaft moves, the first annular limiting part is contacted with one end of the first supporting spherical hinge, and the other end of the first supporting spherical hinge is contacted with the third annular limiting part to form a positive movement limiting structure for the torsion bar shaft; when the other side of the torsion bar shaft moves, the second annular limiting part is contacted with one end of the second supporting spherical hinge, and the other end of the second supporting spherical hinge is contacted with the fourth annular limiting part to form a reverse movement limiting structure for the torsion bar shaft.
Description
Technical Field
The invention relates to an improved method and an improved matching structure of a component for a rail transit vehicle, in particular to an axial float prevention method consisting of anti-side-rolling torsion bars and an anti-side-rolling torsion bar assembly, belonging to the technical field of rail transit.
Background
When the vehicle does side rolling movement, the anti-side rolling torsion bar component (comprising the supporting device) and the vehicle secondary suspension provide the side rolling rigidity required by the safe operation of the vehicle together, so as to meet the requirement of the dynamic performance of the vehicle and ensure the safe operation of the vehicle.
As shown in fig. 1, the conventional anti-roll torsion bar assembly for track traffic generally comprises a torsion bar assembly 1, a connecting rod assembly 2 and a supporting seat assembly 3, wherein a torsion bar shaft in the torsion bar assembly provides roll stiffness through a torsion reaction force when a vehicle body rolls on a side and is fed back to the vehicle body through the connecting rod, so that the torsion bar shaft is a core component of the anti-roll torsion bar assembly. The anti-side-rolling torsion bar assembly is fixed on the bogie through the supporting seat assembly and is fixed on the vehicle body through the connecting rod assembly (reverse installation is opposite).
The anti-rolling torsion bar composition device can be divided into a built-in type and an external type according to the position of the supporting seat component. The built-in supporting seat assembly is generally composed of a two-petal metal supporting seat and a two-petal metal rubber supporting spherical hinge, wherein the metal rubber supporting spherical hinge is tile-shaped in appearance and structure and is formed by vulcanizing metal and rubber, the contact surfaces of other parts formed by the inner layer metal and the outer layer metal and the torsion bar are all encapsulated, and the rubber is generally natural rubber. Twisting together with the torsion bar shaft by the deformation of the laminated rubber during twisting; the support seat assembly is generally composed of an integral metal support seat, a plurality of layers of wear-resistant metal or polymer wear-resistant bearings are added in the integral metal support seat, and the polymer wear-resistant bearings are made of wear-resistant polymer materials such as nylon, polytetrafluoroethylene and the like. When the torsion bar shaft is twisted, the cylindrical surface connected with the torsion bar shaft slides relatively to adapt to the movement of the torsion bar shaft. The steel sleeve is arranged at the matching part of the torsion bar shaft to play a role in protecting the torsion bar shaft from abrasion, and the steel sleeve and the torsion bar shaft are in interference fit by utilizing a shrink fit process.
The problem that exists among the prior art is that the torsion bar axle can take place axial float, the horizontal float promptly when the during operation, and the horizontal float of this kind of anti-rolling torsion bar will bring following harm:
1. the anti-rolling torsion bar device deviates from the initial design installation position due to the anti-rolling torsion bar shaft movement, such as the composite vehicle body side rolling movement while the vehicle is in a yaw mode, and the loads of the torsion bar shaft and other anti-rolling torsion bar device parts are increased sharply;
2. the anti-rolling torsion bar shaft has the play, and the anti-rolling torsion bar shaft can not be reset in time after the yaw motion is recovered, namely, the anti-rolling torsion bar device is deviated from the initial installation position, and the load of parts of the anti-rolling torsion bar device is increased sharply when a subsequent vehicle moves in any direction;
3. repeated movement of the side-rolling-resistant torsion bar shaft causes frequent friction between the torsion bar shaft and the layered support spherical hinge of the support seat assembly, and wear causes the layered support spherical hinge of the support seat assembly to fail in advance;
after retrieval, two patent documents in the prior art disclose technical solutions for preventing the axial play, which are respectively:
the Chinese patent with publication number CN103072592A and publication date 2013, 5 and 1 discloses an anti-shifting fixing structure arranged on a torsion bar shaft of a rail transit vehicle, wherein the fixing structure is a split structure and comprises: the anti-shifting structure can prevent the anti-shifting torsion bar shaft from shifting transversely relative to the supporting seat assembly when the vehicle swings.
Second, chinese patent publication No. CN 106314468A, publication No. 2017, 1, 11, discloses a method for preventing lateral movement of an anti-roll torsion bar, which is to adjust the thickness of a rubber sleeve in an anti-roll supporting device to prevent lateral movement of the anti-roll torsion bar, that is, to increase the pre-compression amount of the rubber sleeve by increasing the thickness of the rubber sleeve, thereby reducing the torsional rigidity of the rubber sleeve so that the rubber sleeve and the anti-roll torsion bar can always keep a twisted state during the lateral rolling vibration process to prevent lateral movement of the anti-roll torsion bar.
The technical solutions disclosed in the above two patent documents are different from those in the present application.
In summary, how to design an anti-axial-movement method for an anti-side-rolling torsion bar assembly and the anti-side-rolling torsion bar assembly so as to achieve the purpose of preventing the torsion bar shaft from axially moving and prolong the service life of the anti-side-rolling torsion bar assembly is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-axial-movement method of an anti-side-rolling torsion bar assembly and an anti-side-rolling torsion bar assembly aiming at the defects in the prior art, which can achieve the purpose of preventing the axial movement of a torsion bar shaft and prolong the service life of the anti-side-rolling torsion bar assembly.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an anti-side-rolling torsion bar assembly comprises a torsion bar shaft, a first torsion arm and a second torsion arm which are arranged at two ends of the torsion bar shaft, a first support seat and a second support seat which are arranged on the torsion bar shaft between the first torsion arm and the second torsion arm, wherein a first steel sleeve and a second steel sleeve are assembled on the torsion bar shaft, the first steel sleeve and the first support seat are assembled together through a first support spherical hinge, the second steel sleeve and the second support seat are assembled together through a second support spherical hinge, the anti-side-rolling torsion bar assembly is characterized in that a first annular limiting part is arranged at one end of the first steel sleeve at one side far away from the first torsion arm, a second annular limiting part is arranged at one end of the second steel sleeve at one side far away from the second torsion arm, a third annular limiting part is arranged at one end of the first support seat at one side near the first torsion arm, and a fourth annular limiting part is arranged at one end of the second support seat at one side near the second torsion arm, the first supporting spherical hinge is positioned between the third annular limiting part and the first annular limiting part, and the second supporting spherical hinge is positioned between the second annular limiting part and the fourth annular limiting part;
when the torsion bar shaft moves towards one side of the first torsion arm, the first annular limiting part is contacted with one end of the first support spherical hinge, and the other end of the first support spherical hinge is contacted with the third annular limiting part to form a positive movement limiting structure for the torsion bar shaft; when the torsion bar shaft moves towards one side of the second torsion arm, the second annular limiting part is contacted with one end of the second supporting spherical hinge, and the other end of the second supporting spherical hinge is contacted with the fourth annular limiting part to form a reverse movement limiting structure for the torsion bar shaft.
Preferably, when the torsion bar shaft moves towards one side of the first torsion arm, the first annular limiting part is contacted with one end of the first inner metal layer of the first support spherical hinge, and the other end of the first outer metal layer of the first support spherical hinge is contacted with the third annular limiting part to form a positive movement limiting structure for the torsion bar shaft; on the contrary, when the torsion bar shaft moves towards one side of the second torsion arm, the second annular limiting part is contacted with one end of the inner metal layer of the second support spherical hinge, and the other end of the outer metal layer of the second support spherical hinge is contacted with the fourth annular limiting part to form a reverse movement limiting structure for the torsion bar shaft.
Preferably, when the torsion bar shaft moves towards one side of the first torsion arm, the first annular limiting part is contacted with one end of the first inner metal layer of the first support spherical hinge, and the other end of the first inner metal layer of the first support spherical hinge and the other end of the outer metal layer are contacted with the third annular limiting part to form a positive movement limiting structure for the torsion bar shaft; on the contrary, when the torsion bar shaft moves towards one side of the second torsion arm, the second annular limiting part is contacted with one end of the inner metal layer of the second support spherical hinge, and the other end of the inner metal layer of the second support spherical hinge and the other end of the outer metal layer are contacted with the fourth annular limiting part to form a reverse movement limiting structure for the torsion bar shaft.
Preferably, through holes are formed in the third annular limiting part and the fourth annular limiting part.
Preferably, the first elastic part and the second elastic part are respectively arranged on the outer peripheral surfaces of the first annular limiting part and the second annular limiting part, the first elastic part is tightly pressed between the groove on the outer peripheral surface of the first annular limiting part and the inner peripheral surface of the first supporting seat, and the second elastic part is tightly pressed between the groove on the outer peripheral surface of the first annular limiting part and the inner peripheral surface of the second supporting seat; and the first elastic component and the second elastic component are used for increasing the axial resistance.
Preferably, a first sealing ring is arranged between the first supporting seat and the first torsion arm, one end of the first sealing ring is in contact with the first torsion arm, the other end of the first lip-shaped sealing ring is in three-phase contact with an annular limiting part of the first supporting seat, and a first sealing space is formed between the first elastic part and the first lip-shaped sealing ring, so that the first supporting spherical hinge is positioned in the first sealing space; and a second sealing ring is arranged between the second supporting seat and the second torsion arm, one end of the second sealing ring is in contact with the second torsion arm, the other end of the second sealing ring is in contact with the fourth annular limiting part of the second supporting seat, and a second sealing space is formed between the second elastic part and the second sealing ring, so that the second supporting spherical hinge is positioned in the second sealing space.
Preferably, a PTFE coating is arranged between the inner metal layer of the supporting spherical hinge and the steel sleeve, so that the inner metal layer of the supporting spherical hinge is in contact with the steel sleeve through the PTFE coating.
The invention also discloses an anti-side rolling torsion bar composition, which comprises a torsion bar shaft, a first torsion arm and a second torsion arm which are arranged at the two ends of the torsion bar shaft, a first support seat and a second support seat which are arranged on the torsion bar shaft between the first torsion arm and the second torsion arm, wherein a first steel sleeve and a second steel sleeve are assembled on the torsion bar shaft, the first steel sleeve and the first support seat are assembled together through a first support spherical hinge, the second steel sleeve and the second support seat are assembled together through a second support spherical hinge, a first annular limiting part is arranged at one end of the first steel sleeve which is positioned at one side far away from the first torsion arm, a second annular limiting part is arranged at one end of the second steel sleeve which is positioned at one side far away from the second torsion arm, a third annular limiting part is arranged at one end of the first support seat which is positioned at one side near the first torsion arm, a fourth annular limiting part is arranged at one end of the second support seat which is positioned at one side near, the first supporting spherical hinge is located between the third annular limiting part and the first annular limiting part, and the second supporting spherical hinge is located between the second annular limiting part and the fourth annular limiting part.
Preferably, a first elastic part and a second elastic part are respectively arranged on the outer peripheral surfaces of the first annular limiting part and the second annular limiting part, the first elastic part is pressed between the groove on the outer peripheral surface of the first annular limiting part and the inner peripheral surface of the first supporting seat, and the second elastic part is pressed between the groove on the outer peripheral surface of the first annular limiting part and the inner peripheral surface of the second supporting seat.
Preferably, a first sealing ring is arranged between the first supporting seat and the first torsion arm, one end of the first sealing ring is in contact with the first torsion arm, the other end of the first lip-shaped sealing ring is in three-phase contact with an annular limiting part of the first supporting seat, and a first sealing space is formed between the first elastic part and the first lip-shaped sealing ring, so that the first supporting spherical hinge is positioned in the first sealing space; and a second sealing ring is arranged between the second supporting seat and the second torsion arm, one end of the second sealing ring is in contact with the second torsion arm, the other end of the second sealing ring is in contact with the fourth annular limiting part of the second supporting seat, and a second sealing space is formed between the second elastic part and the second sealing ring, so that the second supporting spherical hinge is positioned in the second sealing space.
The invention has the beneficial effects that: the invention carries out axial limit when the torsion bar shaft generates two-side play by arranging the end part limit structures at the two end parts, thereby achieving the purpose of preventing the torsion bar shaft from axially playing and prolonging the service life of the anti-side-rolling torsion bar assembly. By arranging the elastic component on the outer peripheral surface of the annular limiting part, after the torsion bar shaft is assembled, the elastic component generates tension force, the axial resistance of the torsion bar shaft is increased, and the problem of axial movement of the torsion bar shaft is further prevented. Utilize the elastomeric element who adds and set up the sealing washer between supporting seat and torsion arm to form sealed space for support ball pivot is arranged in this sealed space, can avoid during external moisture of during operation, dust etc. enter into sealed space like this, thereby the life of extension product. The PTFE coating is used for replacing the rubber encapsulation coating, so that the PTFE coating on the inner metal layer of the supporting spherical hinge is contacted with the steel sleeve on the torsion bar shaft or the torsion bar shaft, the problem of aging of the rubber encapsulation coating is avoided, and the service life is further prolonged. In addition, the PTFE coating is used for replacing the high-molecular wear-resistant bearing, the product structure and the installation process are simplified, the friction pair and the installation space are reduced, the manufacturing cost is reduced, and the operation abnormal sound caused by the action of the high-molecular wear-resistant bearing is avoided.
Drawings
FIG. 1 is a schematic perspective view of an anti-roll torsion bar assembly;
FIG. 2 is a front view structural view of a built-in anti-roll torsion bar in embodiment 1 of the present invention;
FIG. 3 is a schematic axial sectional view of the first support seat and the second support seat in FIG. 2;
FIG. 4 is a schematic view of a partial axial cross-sectional view of the second support seat shown in FIG. 3;
fig. 5 is a schematic partial axial sectional view of the annular position limiting portion at three positions in embodiment 2 of the present invention;
fig. 6 is a schematic partial axial sectional view of the annular position limiting portion at three positions in embodiment 3 of the present invention;
FIG. 7 is a partial axial cross-sectional structural view at the PTFE coating layer in example 4 of the present invention;
in the figure: 1. the torsion bar assembly comprises a torsion bar assembly, 2, a connecting bar assembly, 3, a support seat assembly, 4, a torsion bar shaft, 5, a first torsion arm, 6, a second torsion arm, 7, a first support seat, 8, a second support seat, 9, a first steel sleeve, 10, a second steel sleeve, 11, a first support ball hinge, 111, an inner metal layer, 112, an outer metal layer, 12, a second support ball hinge, 13, a first annular limiting part, 14, a second annular limiting part, 15, a third annular limiting part, 16, a fourth annular limiting part, 17, a first elastic component, 18, a second elastic component, 19, a first lip-shaped sealing ring, 20, a second lip-shaped sealing ring, 21, a through hole, 22 and a PTFE coating.
Detailed Description
The technical solution of the present invention is further explained in detail with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 2 and 3, the built-in anti-side-rolling torsion bar comprises a torsion bar shaft 4, a first torsion arm 5 and a second torsion arm 6 arranged at two ends of the torsion bar shaft 4, a first support seat 7 and a second support seat 8 arranged on the torsion bar shaft 4 between the first torsion arm 5 and the second torsion arm 6, the first support seat 7 is arranged at one side close to the first torsion arm 5, the second support seat 8 is arranged at one side close to the second torsion arm 6, a first steel sleeve 9 and a second steel sleeve 10 are assembled on the torsion bar shaft 4 in an interference manner, a first support ball hinge 11 is assembled in the first support seat 7, the first steel sleeve 9 and the first support seat 7 are assembled together through the first support ball hinge 11, a second support ball hinge 12 is assembled in the second support seat 8, the second steel sleeve 10 and the second support 8 are assembled together through the second support ball hinge 12, a first annular limiting part 13 is arranged at one end of the first steel sleeve 9 at one side far from the first torsion arm 5, the first annular limiting part 13 is arranged along the radial protrusion of the first steel sleeve 9, the first annular limiting part 13 and the first steel sleeve 9 can be of an integral structure or a split structure, a second annular limiting part 14 is arranged at one end, located far away from one side of the second torsion arm 6, of the second steel sleeve 10, the second annular limiting part 14 is arranged along the radial protrusion of the second steel sleeve 10, and the second annular limiting part 14 and the second steel sleeve 10 can be of an integral structure or a split structure. An annular limiting part III 15 is arranged at one end of the supporting seat I7, which is positioned at one side close to the torsion arm I5, the annular limiting part III 15 is arranged in a protruding mode along the radial direction of the supporting seat I7, and the annular limiting part III 15 and the supporting seat I7 can be of an integral structure or a split structure; one end of the second supporting seat 8, which is positioned at one side close to the second torsion arm 6, is provided with a fourth annular limiting part 16, the fourth annular limiting part 16 is arranged in a protruding mode along the radial direction of the second supporting seat 8, and the fourth annular limiting part 16 and the second supporting seat 8 can be of an integral structure or a split structure. The first support spherical hinge 11 is located between the third annular limiting part 15 and the first annular limiting part 13, and the second support spherical hinge 12 is located between the second annular limiting part 14 and the fourth annular limiting part 16. The steel sleeve and the supporting spherical hinge are in transition or small clearance fit, so that the radial supporting force can be provided in the using process, and the torsion function of the torsion bar shaft can be realized.
As shown in fig. 3, when the torsion bar shaft 4 moves towards one side of the torsion arm one 5, the torsion bar shaft 4 drives the steel sleeve one 9 to move together, the annular limiting portion one 13 is in contact with one end of the supporting spherical hinge one 11, and the other end of the supporting spherical hinge one 11 is in contact with the annular limiting portion three 15 to form a positive movement limiting structure for the torsion bar shaft 4. When the torsion bar shaft 4 moves towards one side of the second torsion arm 6, the torsion bar shaft 4 drives the second steel sleeve 10 to move together, the second annular limiting portion 14 is in contact with one end of the second support spherical hinge 12, and the other end of the second support spherical hinge 12 is in contact with the fourth annular limiting portion 16 to form a reverse movement limiting structure for the torsion bar shaft 4. The invention carries out axial limit when the torsion bar shaft generates two-side play by arranging the end part limit structures at the two end parts, thereby achieving the purpose of preventing the torsion bar shaft from axially playing and prolonging the service life of the anti-side-rolling torsion bar assembly.
In this embodiment, when the position limitation is performed, the inner metal layer of the supporting spherical hinge is in contact with the annular position limitation component on the steel sleeve, and the outer metal layer of the supporting spherical hinge is in contact with the annular position limitation component of the supporting seat to perform the position limitation. As shown in fig. 4, when the torsion bar shaft 4 moves towards one side of the torsion arm one 5, the torsion bar shaft 4 drives the steel sleeve one 9 to move together, the annular limiting portion one 13 contacts with one end of the inner metal layer 111 of the supporting ball hinge one 11, and the other end of the outer metal layer 112 of the supporting ball hinge one 11 contacts with the annular limiting portion three 15 to form a positive movement limiting structure for the torsion bar shaft 4. On the contrary, when the torsion bar shaft 4 moves towards one side of the second torsion arm 6, the torsion bar shaft 4 drives the second steel sleeve 10 to move together, the second annular limiting portion 14 is in contact with one end of the inner metal layer of the second support spherical hinge 12, and the other end of the outer metal layer of the second support spherical hinge 12 is in contact with the fourth annular limiting portion 16 to form a reverse movement limiting structure for the torsion bar shaft 4.
The applicant carries out the fatigue test of the whole stand of the product with the axial load according to the technical scheme of the embodiment, and compares the fatigue test with the product in the prior art, and the comparison data of the axial float displacement test is as follows:
from the above experimental data, it can be concluded that the axial play displacement of the prior art product is substantially between 2-5mm, while the axial play displacement of the present embodiment is controlled to be substantially within 1 mm. It can be seen that the axial play displacement of the product of this embodiment is much less than that of the prior art product.
In order to further limit the axial movement of the torque shaft, a groove may be formed on the outer circumferential surface of the annular stopper, an elastic member may be disposed in the groove, one side of the elastic member 17 may be disposed in the groove, and the other side of the elastic member 17 may be in compressive contact with the inner circumferential surface of the support base. In this embodiment, the elastic component 17 is an elastic sealing ring, the diameter of the elastic component 17 is larger than the distance between the bottom of the groove and the inner circumferential surface of the support seat, and after the assembly, the elastic component 17 is pressed by the groove and the inner circumferential surface of the support seat. After the compression, the elastic component 17 generates tension to increase the axial resistance, thereby further preventing the axial movement of the torsion bar shaft. As shown in fig. 3 and 4, the first elastic member 17 and the second elastic member 18 are respectively disposed on the outer peripheral surfaces of the first annular limiting portion 13 and the second annular limiting portion 14, the first elastic member 17 is pressed between the groove on the outer peripheral surface of the first annular limiting portion 13 and the inner peripheral surface of the first support seat 7, and the second elastic member 18 is pressed between the groove on the outer peripheral surface of the second annular limiting portion 14 and the inner peripheral surface of the second support seat 8.
The applicant has made an axial play test on the product with the elastic component added, and the data is as follows:
from the experimental data, the axial static friction force of the product added with the elastic component can reach 1.5-2.5 kN and the axial rigidity can reach 1.1-1.5 kN/mm in the axial float test. Therefore, the axial movement displacement prevention performance of the product with the elastic component is further enhanced.
In addition, it should be noted that, in this embodiment, the elastic component is added to further prevent the torsion bar shaft from moving axially, and it also has a function of forming a sealing space by using the elastic component and the seal ring disposed between the support seat and the torsion arm, so that the support ball hinge is located in the sealing space. As shown in fig. 3 and 4, a first lip seal 19 is disposed between the first support seat 7 and the first torsion arm 5, one end of the first lip seal 19 is in contact with the first torsion arm 5, and the other end of the first lip seal 19 is in contact with a third annular limiting portion 15 of the first support seat 7, so that a first sealing space is formed between the first elastic component 17 and the first lip seal 19, and the first support ball hinge 11 is located in the first sealing space. Similarly, a second lip-shaped sealing ring 20 is arranged between the second supporting seat 8 and the second torsion arm 6, one end of the second lip-shaped sealing ring 20 is in contact with the second torsion arm 6, the other end of the second lip-shaped sealing ring 20 is in contact with the fourth annular limiting part 16 of the second supporting seat 8, and a second sealing space is formed between the second elastic part 18 and the second lip-shaped sealing ring 20, so that the second supporting ball hinge 12 is located in the second sealing space. Therefore, external moisture, dust and the like can be prevented from entering the sealed space during working, and the service life of the product is prolonged.
Example 2: compared with the embodiment 1, the difference is that: the annular part on the inner peripheral surface of the supporting seat is in contact with the inner metal layer and the outer metal layer of the supporting spherical hinge, namely when the limiting is carried out, the inner metal layer of the supporting spherical hinge is in contact with the annular limiting part on the steel sleeve, and the outer metal layer and the inner metal layer of the supporting spherical hinge are in contact with the annular limiting part of the supporting seat to carry out limiting. As shown in fig. 5, when the torsion bar shaft 4 moves towards one side of the torsion arm one 5, the torsion bar shaft 4 drives the steel sleeve one 9 to move together, and the annular limiting portion one 13 contacts with one end of the inner metal layer 111 of the support spherical hinge one 11, and the other ends of the inner metal layer 111 and the outer metal layer 112 of the support spherical hinge one 11 contact with the annular limiting portion three 15 to form a positive movement limiting structure for the torsion bar shaft 4. On the contrary, when the torsion bar shaft 4 moves towards one side of the second torsion arm 6, the second steel sleeve 10 is driven by the torsion bar shaft 4 to move together, the second annular limiting portion 14 is in contact with one end of the inner metal layer of the second support spherical hinge 12, and the other ends of the inner metal layer and the outer metal layer of the second support spherical hinge 12 are in contact with the fourth annular limiting portion 16 to form a reverse movement limiting structure (not shown in the figure) for the torsion bar shaft 4.
Example 3: as shown in fig. 6, the difference from embodiment 2 is that: through holes 21 are formed in the third annular limiting part 15 and the fourth annular limiting part 16. When disassembly maintenance is required, the support ball hinge needs to be taken out of the support seat, but since the support ball hinge is assembled into the support seat through interference fit, the support ball hinge is difficult to take out. This embodiment is through offering the through-hole on the spacing portion of annular on the supporting seat inner peripheral surface, when dismantling, as long as the stick of dismantling is inserted from the through-hole and will support the ball pivot ejecting from the supporting seat can, has reduced the maintenance degree of difficulty like this.
Example 4: in the prior art, the inner metal layer of the support spherical hinge is further vulcanized with a rubber encapsulation coating, when the support spherical hinge is assembled and is in contact with the steel sleeve on the torsion bar shaft or the torsion bar shaft, the rubber encapsulation coating on the inner metal layer of the support spherical hinge is actually in contact with the steel sleeve on the torsion bar shaft or the torsion bar shaft, and during work, friction heating occurs at the position, so that the rubber encapsulation coating is aged, and the service life is shortened. In the scheme, the PTFE coating is directly sprayed on the inner metal layer of the supporting spherical hinge, and the PTFE coating is used for replacing the rubber encapsulation coating, so that the PTFE coating on the inner metal layer of the supporting spherical hinge is contacted with the steel sleeve on the torsion bar shaft or the torsion bar shaft, the problem of aging of the rubber encapsulation coating is avoided, and the service life is further prolonged. In addition, the PTFE coating is used for replacing the high-molecular wear-resistant bearing, the product structure and the installation process are simplified, the friction pair and the installation space are reduced, the manufacturing cost is reduced, and the operation abnormal sound caused by the action of the high-molecular wear-resistant bearing is avoided.
As shown in fig. 7, in the present embodiment, the PTFE coating 22 is sprayed on the inner peripheral surface of the inner metal layer 111 supporting the ball joint, and the PTFE coating 22 is in direct contact with the steel sleeve. And a PTFE coating is sprayed on the inner peripheral surface of the inner metal layer of the second support spherical hinge, and the PTFE coating is in direct contact with the second steel sleeve. Here, the PTFE coating can also be sprayed onto the steel sleeve on the torsion bar shaft or torsion bar shaft and then assembled.
The applicant carried out relevant experiments on products coated with PTFE, the data of which are as follows:
| test item | Hardness of coating | Coating adhesion (coating thickness 50/100/150 μm) | Salt spray test | Impact resistance (coating thickness 50/100/150 μm) |
| The result of the detection | 2H | ＞20 | Not less than 1000 hours | The impact height is 50cm, and the impact depth is less than or equal to 2mm |
| Test standard | GB/T 6739 | GB/T 5210 | GB/T10125 | ISO 6272-1 |
From the above data, it can be seen that various properties of the product sprayed with the PTFE coating are further optimized.
In conclusion, the end limiting structures at the two ends are arranged to axially limit the torsion bar shaft when the torsion bar shaft has two-side play, so that the purpose of preventing the torsion bar shaft from axially playing can be achieved, and the service life of the anti-side-rolling torsion bar assembly is prolonged. By arranging the elastic component on the outer peripheral surface of the annular limiting part, after the torsion bar shaft is assembled, the elastic component generates tension force, the axial resistance of the torsion bar shaft is increased, and the problem of axial movement of the torsion bar shaft is further prevented. Utilize the elastomeric element who adds and set up the sealing washer between supporting seat and torsion arm to form sealed space for support ball pivot is arranged in this sealed space, can avoid during external moisture of during operation, dust etc. enter into sealed space like this, thereby the life of extension product. The PTFE coating is used for replacing the rubber encapsulation coating, so that the PTFE coating on the inner metal layer of the supporting spherical hinge is contacted with the steel sleeve on the torsion bar shaft or the torsion bar shaft, the problem of aging of the rubber encapsulation coating is avoided, and the service life is further prolonged. In addition, the PTFE coating is used for replacing the high-molecular wear-resistant bearing, the product structure and the installation process are simplified, the friction pair and the installation space are reduced, the manufacturing cost is reduced, and the operation abnormal sound caused by the action of the high-molecular wear-resistant bearing is avoided.
The term "plurality" as used in the above embodiments means a number of "two or more". The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. A method for preventing axial float of an anti-side-rolling torsion bar assembly, wherein the anti-side-rolling torsion bar assembly comprises a torsion bar shaft, a first torsion arm and a second torsion arm which are arranged at two ends of the torsion bar shaft, and a first supporting seat and a second supporting seat which are arranged on the torsion bar shaft between the first torsion arm and the second torsion arm, wherein a first steel sleeve and a second steel sleeve are assembled on the torsion bar shaft, the first steel sleeve and the first supporting seat are assembled together through a first supporting spherical hinge, and the second steel sleeve and the second supporting seat are assembled together through a second supporting spherical hinge, and the method is characterized in that: the axial float prevention method is characterized in that a first annular limiting part is arranged at one end of a first steel sleeve positioned at one side far away from a first torsion arm, a second annular limiting part is arranged at one end of a second steel sleeve positioned at one side far away from a second torsion arm, a third annular limiting part is arranged at one end of a first supporting seat positioned at one side close to the first torsion arm, a fourth annular limiting part is arranged at one end of the second supporting seat positioned at one side close to the second torsion arm, a first supporting spherical hinge is positioned between the third annular limiting part and the first annular limiting part, and a second supporting spherical hinge is positioned between the second annular limiting part and the fourth annular limiting part;
when the torsion bar shaft moves towards one side of the first torsion arm, the first annular limiting part is contacted with one end of the first support spherical hinge, and the other end of the first support spherical hinge is contacted with the third annular limiting part to form a positive movement limiting structure for the torsion bar shaft; when the torsion bar shaft moves towards one side of the second torsion arm, the second annular limiting part is contacted with one end of the second supporting spherical hinge, and the other end of the second supporting spherical hinge is contacted with the fourth annular limiting part to form a reverse movement limiting structure for the torsion bar shaft.
2. The axial play prevention method as recited in claim 1, wherein: when the torsion bar shaft moves towards one side of the first torsion arm, the first annular limiting part is contacted with one end of the first inner metal layer of the first support spherical hinge, and the other end of the first outer metal layer of the first support spherical hinge is contacted with the third annular limiting part to form a positive movement limiting structure for the torsion bar shaft; on the contrary, when the torsion bar shaft moves towards one side of the second torsion arm, the second annular limiting part is contacted with one end of the inner metal layer of the second support spherical hinge, and the other end of the outer metal layer of the second support spherical hinge is contacted with the fourth annular limiting part to form a reverse movement limiting structure for the torsion bar shaft.
3. The axial play prevention method as recited in claim 1, wherein: when the torsion bar shaft moves towards one side of the first torsion arm, the first annular limiting part is contacted with one end of the first inner metal layer of the first support spherical hinge, and the other end of the first inner metal layer and the other end of the outer metal layer of the first support spherical hinge are contacted with the third annular limiting part to form a positive movement limiting structure for the torsion bar shaft; on the contrary, when the torsion bar shaft moves towards one side of the second torsion arm, the second annular limiting part is contacted with one end of the inner metal layer of the second support spherical hinge, and the other end of the inner metal layer of the second support spherical hinge and the other end of the outer metal layer are contacted with the fourth annular limiting part to form a reverse movement limiting structure for the torsion bar shaft.
4. The axial play prevention method as recited in claim 3, wherein: through holes are formed in the third annular limiting part and the fourth annular limiting part.
5. The axial play prevention method as recited in claim 2, 3 or 4, wherein: the outer peripheral surfaces of the first annular limiting part and the second annular limiting part are respectively provided with a first elastic part and a second elastic part, the first elastic part is tightly pressed between the groove on the outer peripheral surface of the first annular limiting part and the inner peripheral surface of the first supporting seat, and the second elastic part is tightly pressed between the groove on the outer peripheral surface of the second annular limiting part and the inner peripheral surface of the second supporting seat; and the first elastic component and the second elastic component are used for increasing the axial resistance.
6. The axial play prevention method as recited in claim 5, wherein: a first sealing ring is arranged between the first supporting seat and the first torsion arm, one end of the first sealing ring is in contact with the first torsion arm, the other end of the first lip-shaped sealing ring is in three-phase contact with an annular limiting part of the first supporting seat, and a first sealing space is formed between the first elastic part and the first lip-shaped sealing ring, so that the first supporting ball hinge is positioned in the first sealing space; and a second sealing ring is arranged between the second supporting seat and the second torsion arm, one end of the second sealing ring is in contact with the second torsion arm, the other end of the second sealing ring is in contact with the fourth annular limiting part of the second supporting seat, and a second sealing space is formed between the second elastic part and the second sealing ring, so that the second supporting spherical hinge is positioned in the second sealing space.
7. The axial play prevention method as recited in claim 2, 3 or 4, wherein: and a PTFE coating is arranged between the inner metal layer of the supporting spherical hinge and the steel sleeve, so that the inner metal layer of the supporting spherical hinge is contacted with the steel sleeve through the PTFE coating.
8. The utility model provides an anti side roll torsion bar is constituteed, includes the torsion bar axle, set up torsion arm one and torsion arm two in torsion bar axle both ends position department, set up at the epaxial supporting seat one and the supporting seat two of torsion bar that lie in between torsion arm one and the torsion arm two, be equipped with steel bushing one and steel bushing two on the torsion bar axle, through supporting ball pivot one between steel bushing one and the supporting seat one and assemble together, through supporting ball pivot two between steel bushing two and the supporting seat two assemble together its characterized in that: the torsion arm comprises a first torsion arm, a second torsion arm, a first support seat, a second support seat, a first annular limiting portion, a second annular limiting portion, a third annular limiting portion, a fourth annular limiting portion, a first support ball hinge and a second support ball hinge, wherein the first annular limiting portion is arranged at one end of the first steel sleeve, which is located on one side far away from the first torsion arm, the second annular limiting portion is arranged at one end of the second steel sleeve, the third annular limiting portion is arranged at one end of the first support seat, which is located on one side near the second torsion arm, the first support ball hinge is located at a position between the third annular limiting portion and the first annular limiting portion, and the second support ball hinge is located at a position.
9. An anti-roll torsion bar assembly according to claim 8, wherein: the first elastic part and the second elastic part are respectively arranged on the outer peripheral surfaces of the first annular limiting part and the second annular limiting part, the first elastic part is tightly pressed between the groove on the outer peripheral surface of the first annular limiting part and the inner peripheral surface of the first supporting seat, and the second elastic part is tightly pressed between the groove on the outer peripheral surface of the first annular limiting part and the inner peripheral surface of the second supporting seat.
10. An anti-roll torsion bar assembly according to claim 9, wherein: a first sealing ring is arranged between the first supporting seat and the first torsion arm, one end of the first sealing ring is in contact with the first torsion arm, the other end of the first lip-shaped sealing ring is in three-phase contact with an annular limiting part of the first supporting seat, and a first sealing space is formed between the first elastic part and the first lip-shaped sealing ring, so that the first supporting ball hinge is positioned in the first sealing space; and a second sealing ring is arranged between the second supporting seat and the second torsion arm, one end of the second sealing ring is in contact with the second torsion arm, the other end of the second sealing ring is in contact with the fourth annular limiting part of the second supporting seat, and a second sealing space is formed between the second elastic part and the second sealing ring, so that the second supporting spherical hinge is positioned in the second sealing space.
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| CN201911133948.3A CN110936972A (en) | 2019-11-19 | 2019-11-19 | Anti-axial-movement method for anti-side-rolling torsion bar assembly and anti-side-rolling torsion bar assembly |
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| CN201911133948.3A CN110936972A (en) | 2019-11-19 | 2019-11-19 | Anti-axial-movement method for anti-side-rolling torsion bar assembly and anti-side-rolling torsion bar assembly |
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| CN113685548A (en) * | 2021-08-09 | 2021-11-23 | 株洲时代瑞唯减振装备有限公司 | Sealing method for rubber support spherical hinge in anti-side-rolling torsion bar device |
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