Elastic joint in hinging device of low-floor vehicle

Abstract

Abstract The present invention relates to an elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve, an outer rolling ball sleeve arranged inside the outer seat sleeve, and an inner limiting block arranged inside the outer rolling ball sleeve; opposite surfaces between the outer rolling ball sleeve and the inner limiting block are configured as matching spherical surfaces; a first wear-resistant ball sleeve is vulcanized through first rubber inside the outer seat sleeve; opposite surfaces between the first wear-resistant ball sleeve and the outer rolling ball sleeve are also configured as matching spherical surfaces; and when the inner limiting block is locked on the outer seat sleeve to form the elastic joint, the spherical surfaces between the first wear-resistant ball sleeve and the outer rolling ball sleeve come into contact. When the elastic joint rotates or swings, the action of the elastic joint is borne by the deformation of the first rubber or the action of the elastic joint is borne jointly by the deformation of the first rubber and a friction pair formed between the first wear-resistant ball sleeve and the outer rolling ball sleeve according to the magnitude of a rotating or swinging angle. The elastic joint manufactured by the design method can reduce the degree of wear between a wear-resistant bushing and an outer rolling ball sleeve in an operation process, thereby greatly prolonging the service life of a product. Abstract The present invention relates to an elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve, an outer rolling ball sleeve arranged inside the outer seat sleeve, and an inner limiting block arranged inside the outer rolling ball sleeve; opposite surfaces between the outer rolling ball sleeve and the inner limiting block are configured as matching spherical surfaces; a first wear-resistant ball sleeve is vulcanized through first rubber inside the outer seat sleeve; opposite surfaces between the first wear-resistant ball sleeve and the outer rolling ball sleeve are also configured as matching spherical surfaces; and when the inner limiting block is locked on the outer seat sleeve to form the elastic joint, the spherical surfaces between the first wear-resistant ball sleeve and the outer rolling ball sleeve come into contact. When the elastic joint rotates or swings, the action of the elastic joint is borne by the deformation of the first rubber or the action of the elastic joint is borne jointly by the deformation of the first rubber and a friction pair formed between the first wear-resistant ball sleeve and the outer rolling ball sleeve according to the magnitude of a rotating or swinging angle. The elastic joint manufactured by the design method can reduce the degree of wear between a wear-resistant bushing and an outer rolling ball sleeve in an operation process, thereby greatly prolonging the service life of a product. 20 25 24 86 83 09 O ct 2 02 5 A b s t r a c t 2 0 2 5 2 4 8 6 8 3 0 9 O c t 2 0 2 5 2 / 4 Fig. 3 Fig. 4 2 / 4 10 14 2 15 5 1 411 Fig. 3 12 11 13 Fig. 4 20 25 24 86 83 09 O ct 2 02 5 2 0 2 5 2 0 2 5 2 4 8 6 8 3 0 9 O c t 4 1 1 1 1 1 3

Claims

1. An elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve, characterized in that: an outer rolling ball sleeve arranged inside the outer seat sleeve, and an inner limiting block arranged inside the outer rolling ball sleeve; opposite surfaces between the outer rolling ball sleeve and the inner limiting block are configured as matching spherical surfaces; a first wear-resistant ball sleeve is vulcanized through first rubber inside the outer seat sleeve; opposite surfaces between the first wear-resistant ball sleeve and the outer rolling ball sleeve are also configured as matching spherical surfaces; and when the inner limiting block is locked on the outer seat sleeve to form the elastic joint, the spherical surfaces between the first wear-resistant ball sleeve and the outer rolling ball sleeve come into contact.

2. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 1, characterized in that: a second wear-resistant ball sleeve is arranged on an inner spherical surface of the outer rolling ball sleeve, second rubber is vulcanized and bonded on outer spherical surface of the inner limiting block, and when the elastic joint is under rotation or swing, a gap H is reserved between the second rubber and the second wear-resistant ball sleeve; when the elastic joint is under traction or braking, the gap H becomes zero, and flexible frictional contact is formed between the second rubber and the second wear-resistant ball sleeve.

3. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 1, characterized in that: the second wear-resistant ball sleeve is vulcanized and bonded on the outer spherical surface of the inner limiting block through the second rubber, and when the elastic joint is under rotation or swing, a gap H is reserved between the second wear-resistant ball sleeve and the inner spherical surface of the outer rolling ball sleeve; and when the elastic joint is under traction or braking, flexible2025248683   09 Oct 2025frictional contact is formed between the second wear-resistant ball sleeve and the outer rolling ball sleeve.

4. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 1, characterized in that: a rubber sealing ring is arranged on the first rubber near a top of the outer seat sleeve; the rubber sealing ring and the first rubber are integrally vulcanized and formed; and after the elastic joint is assembled, one end of the rubber sealing ring comes into contact with the outer spherical surface of the outer rolling ball sleeve to form a first sealing structure for sealing the interior of the elastic joint.

5. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 4, characterized in that: an annular step part (is arranged near an inner top of the outer rolling ball sleeve, the annular step part is provided with an annular groove, and a sealing ring is arranged in the annular groove; and during assembly, a top plate is compacted on the annular step part, and the top plate is used for compacting and coming into contact with the sealing ring to form a second sealing structure.

6. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 4, characterized in that: a top end of the rubber sealing ring is inclined, and is tilted downward along the outer rolling ball sleeve towards the direction of the outer seat sleeve.

7. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 4, characterized in that: the first rubber comprises a spherical rubber body, the spherical rubber body is vulcanized and bonded between an inner spherical surface of the outer seat sleeve and an outer spherical surface of the first wear-resistant ball sleeve, and a bottom end of the rubber sealing ring is in contact with one end of the spherical rubber body to form an integrated structure; the inner spherical surface of the outer2025248683   09 Oct 2025seat sleeve is also provided with an upward extending shaft column, the other end of the spherical rubber body extends out to form a sleeve-shaped rubber body, an outer peripheral surface of the shaft column is wrapped with the sleeve-shaped rubber body, and a radial spacing K is reserved between the sleeve-shaped rubber body and the outer rolling ball sleeve.

8. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 7, characterized in that: a plurality of layers of spacers are arranged inside the spherical rubber body; and the rubber sealing ring wraps a top position of the spacers, thereby wrapping the top of the spacers through the rubber sealing ring.

9. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 7, characterized in that: a plurality of layers of spacers are arranged inside the spherical rubber body; and the rubber sealing ring wraps the top position of the spacer closest to the outer rolling ball sleeve, thereby wrapping the top of the spacer closest to the outer rolling ball sleeve through the rubber sealing ring.

10. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 2, characterized in that: the inner spherical surface of the outer rolling ball sleeve is provided with a first embedding groove, and the second wear-resistant ball sleeve is embedded into the first embedding groove, thereby arranging the second wear-resistant ball sleeve on the inner spherical surface of the outer rolling ball sleeve.

11. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 8 or 9, characterized in that: a side part of the spacer closest to the outer rolling ball sleeve is provided with a second embedding groove; and first, the spacer is vulcanized and bonded on the outer seat sleeve through the first rubber, and then the first wear-resistant ball sleeve2025248683   09 Oct 2025is embedded into the second embedding groove, so that the first wear-resistant ball sleeve is vulcanized inside the outer seat sleeve through the first rubber.

12. The elastic joint in a hinging device of a low-floor vehicle comprises an outer seat sleeve according to claim 1, characterized in that: a contact spherical surface between the first wear-resistant ball sleeve and the outer rolling ball sleeve is provided with an oil storage tank.

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