CN214248271U - Reverse gear shaft - Google Patents

Abstract

The utility model provides a reverse gear shaft belongs to gearbox spare part technical field. It has solved the current gear that reverses gear easy not hard up displacement on the reverse gear axle body, the poor problem of structural stability. This reverse gear axle includes the reverse gear axle body, and the right-hand member cover of reverse gear axle body is equipped with the reverse gear, is provided with the assembly structure that makes reverse gear and reverse gear axle body spacing fixed between reverse gear and the reverse gear axle body, and assembly structure includes spacing key strip, and spacing key strip axial interference assembles between spacing groove one, spacing groove two, still is provided with between reverse gear axle body and the reverse gear and prevents that spacing key strip axial displacement from leaning on the structure. The utility model has the advantages of reasonable design, simply, reverse gear axle body and reverse gear assembly are stable, difficult not hard up displacement, long service life, reverse gear structure wholeness stable performance.

Description

Reverse gear shaft

Technical Field

The utility model belongs to the technical field of gearbox spare part, a reverse gear axle is related to.

Background

The reverse gear shaft of the vehicle gearbox is arranged in the gearbox shell and used for realizing the transmission process of backing a vehicle. The gear of the gearbox is changed by controlling the engagement and the disengagement of different gears of the gearbox through an operating mechanism, so that the transmission ratio of power transmission is changed. The gear shifting mode of the gearbox comprises meshing sleeve gear shifting and sliding gear shifting.

For example, chinese patent literature discloses a reverse gear shaft structure [ application No.: 202020302180. X; authorization notice number: CN211715746U ], which comprises a reverse shaft body, wherein the end of the reverse shaft body is provided with an installation block extending to the side, the installation block and the reverse shaft body adopt an integrated structure, the top of the installation block is provided with a threaded installation hole, the threaded installation hole is internally connected with a bolt for fixedly installing the reverse shaft body, and the reverse shaft body is further provided with a reverse gear assembly.

In foretell reverse gear axle construction, this reverse gear assembly establishes the mode of interference and reverse gear axle body through the cover and fixes, and when long-time operation, this reverse gear wheel is the displacement that becomes flexible easily on reverse gear axle body, and this reverse gear wheel is the structural stability who fixes on reverse gear axle body poor, when reverse gear wheel takes place axial displacement's change on reverse gear axle body, can lead to reverse gear wheel meshing wearing and tearing, causes the operation shakiness of reverse gear structure, and life is short.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, reverse gear axle body and reverse gear assembly stable, reverse gear structure operation is reliable, long service life's reverse gear axle.

The purpose of the utility model can be realized by the following technical proposal: the reverse gear shaft comprises a reverse gear shaft body, wherein the left end part of the reverse gear shaft body is provided with a radially extending installation block, the installation block and the reverse gear shaft body are connected into a whole, the end face of the extension end of the installation block is provided with a threaded installation hole, and the reverse gear shaft is characterized in that the right end of the reverse gear shaft body is sleeved with a reverse gear, an assembly structure for limiting and fixing the reverse gear and the reverse gear shaft body is arranged between the reverse gear and the reverse gear shaft body, the assembly structure comprises a limiting key strip, a first limiting groove which is axially arranged is distributed on the inner wall of the reverse gear at intervals in the circumferential direction, a second limiting groove which is axially arranged is distributed on the outer wall of the right end of the reverse gear shaft body at intervals in the circumferential direction, the notches of the first limiting groove and the second limiting groove are relatively distributed in an interference manner, and the axial direction of the limiting key strip is assembled in the first limiting groove, And between the second limiting groove, a structure for preventing the limiting key strip from axially displacing is arranged between the reverse gear shaft body and the reverse gear.

This reverse gear axle is when the application, and the circumference interval sets up spacing key strip between this reverse gear and the reverse gear axle body, and it is spacing through the circumference of spacing key strip, and the assembly atress is even between this reverse gear and the reverse gear axle body, and relative limit structure is stable, difficult not hard up displacement, long service life.

In foretell reverse gear axle, support and lean on the structure and include that two semi-circles support and lean on the ring, reverse gear's inner wall on have an annular flaring portion, reverse gear is run through to the left end of this annular flaring portion, the right-hand member and the spacing groove axial of this annular flaring portion link to each other, reverse gear axle body's outer wall annular undergauge bit has, the right-hand member and the spacing groove two axial of annular undergauge bit link to each other, the left end of annular undergauge bit extend to reverse gear outside, two semi-circles support and lean on the ring relative lie in reverse gear outer annular undergauge bit, these two semi-circles support and lean on the ring axial to shift to reverse gear in the annular undergauge bit and spacing key strip axial support and lean on the cooperation. Through two semi-circular support rings and spacing keybar axial support and lean on the cooperation, guarantee spacing stability of spacing keybar assembly, long service life.

In foretell reverse gear axle, two semi-circular support ring relative external diameter that forms and reverse gear's annular flaring portion's internal diameter adaptation, two semi-circular support ring's the inner has axially linked firmly rubber support portion respectively through the mode of vulcanizing and supports the portion, two semi-circular support ring support the portion and limit key strip axial support through rubber support and cooperate. The rubber is abutted against the elastic supporting part and the limiting key strip, so that the limiting key strip is more stable to assemble and is not easy to displace.

In the reverse gear shaft, the annular reducing position at the left end of the reverse gear is provided with the radial grooves which are symmetrically arranged, the radial grooves are clamped with the radial pins, and the radial pins and the two semicircular abutting rings are axially abutted and matched. The radial pin is in interference fit with the radial groove, and the shape of the radial pin can be made into a crescent shape, a column shape or a rectangular shape.

In foretell reverse gear axle, reverse gear's right-hand member terminal surface on have the axial and inlay and establish the groove, the axial inlay establish the groove in fixed the rubber circle of inlaying, the rubber circle cover locate on the reverse gear axle body. This rubber circle is used for axial elasticity to lean on, and assembly structure is stable.

In the reverse gear shaft, the rubber abutting part axially extends out of the axial embedding groove of the reverse gear. The purpose of this is: when the reverse gear is axially assembled, the reverse gear can be elastically abutted and is convenient to use.

Compared with the prior art, the reverse gear shaft has the advantages that: structural design is reasonable, simple, and reverse gear shaft body and reverse gear assembly are stable, difficult not hard up displacement, long service life, reverse gear structure wholeness can be stable.

Drawings

Fig. 1 is a schematic sectional view of the reverse gear shaft.

In the figure, 1, a reverse gear shaft body; 2. mounting blocks; 3. a threaded mounting hole; 4. a reverse gear; 5. limiting key bars; 6. a semicircular abutting ring; 7. annular reducing; 8. a rubber abutting portion; 9. a radial pin; 10. a rubber ring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, this reverse gear shaft mainly comprises reverse gear shaft body 1, reverse gear shaft body 1's left end tip has radially extending's installation piece 2, this installation piece 2 and reverse gear shaft body 1 link to each other as an organic whole structure, the terminal surface of the extension end of installation piece 2 is provided with screw thread mounting hole 3, reverse gear shaft body 1's right-hand member cover is equipped with reverse gear 4, be provided with between reverse gear 4 and the reverse gear shaft body 1 and make reverse gear 4 and the spacing fixed assembly structure of reverse gear shaft body 1, when actual manufacturing, this assembly structure's embodiment is: mainly constitute by spacing key strip 5, circumference interval distribution has the spacing groove one that is the axial setting on reverse gear 4's the inner wall, circumference interval distribution has the spacing groove two that is the axial setting on the outer wall of reverse gear axle body 1's right-hand member, the notch of spacing groove one, the notch relative distribution of spacing groove two, 5 axial interference of spacing key strip assemble in spacing groove one, between the spacing groove two, still be provided with between reverse gear axle body 1 and the reverse gear 4 and prevent 5 axial displacement of spacing key strip and lean on the structure.

In actual manufacturing, the specific implementation of the abutting structure is as follows: the reverse gear transmission mechanism mainly comprises two semicircular abutting rings 6, wherein an annular flared part is arranged on the inner wall of a reverse gear 4, the left end of the annular flared part penetrates through the reverse gear 4, the right end of the annular flared part is axially connected with a first limiting groove, an annular reducing position 7 is arranged on the outer wall of a reverse gear shaft body 1, the right end of the annular reducing position 7 is axially connected with a second limiting groove, the left end of the annular reducing position 7 extends out of the reverse gear 4, the two semicircular abutting rings 6 are oppositely positioned on the annular reducing position 7 outside the reverse gear 4, and the two semicircular abutting rings 6 axially move to the annular reducing position 7 in the reverse gear 4 and are axially abutted and matched with a limiting key strip 5; specifically speaking, the relative external diameter that forms of two semi-circular support ring 6 and the internal diameter adaptation of the annular flaring portion of reverse gear 4, the inner of two semi-circular support ring 6 has axially linked firmly rubber support portion 8 respectively through the mode of vulcanizing, and two semi-circular support ring 6 support to lean on the cooperation through rubber support portion 8 and 5 axial of spacing key strip.

In practical application, the annular reduced diameter portion 7 at the left end of the reverse gear 4 is provided with symmetrically arranged radial grooves, the radial grooves are used for clamping the radial pins 9, and the radial pins 9 are axially abutted and matched with the two semicircular abutting rings 6.

During actual manufacturing, an axial embedding groove is formed in the right end face of the reverse gear 4, a rubber ring 10 is fixedly embedded in the axial embedding groove, and the rubber ring 10 is sleeved on the reverse shaft body 1; the rubber abutting part 8 axially extends out of the axial embedding groove of the reverse gear 4.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. A reverse gear shaft comprises a reverse gear shaft body (1), wherein the left end of the reverse gear shaft body (1) is provided with a radially extending mounting block (2), the mounting block (2) and the reverse gear shaft body (1) are connected into a whole, and the end surface of the extending end of the mounting block (2) is provided with a threaded mounting hole (3), the reverse gear shaft is characterized in that the right end of the reverse gear shaft body (1) is sleeved with a reverse gear (4), an assembly structure for limiting and fixing the reverse gear (4) and the reverse gear shaft body (1) is arranged between the reverse gear (4) and the reverse gear shaft body (1), the assembly structure comprises a limiting key strip (5), a first axially arranged limiting groove is circumferentially distributed on the inner wall of the reverse gear (4) at intervals, a second axially arranged limiting groove is circumferentially distributed on the outer wall of the right end of the reverse gear shaft body (1), the notch of spacing groove one, the notch relative distribution of spacing groove two, spacing spline (5) axial interference fit between spacing groove one, spacing groove two, reverse gear shaft body (1) and reverse gear (4) between still be provided with prevent that spacing spline (5) axial displacement from leaning on the structure.

2. Reverse shaft according to claim 1, characterised in that the abutment structure comprises two semi-circular abutment rings (6), the reverse gear wheel (4) having an annular flared portion on its inner wall, the left end of the annular flared part penetrates through the reverse gear (4), the right end of the annular flared part is axially connected with the limiting groove, the outer wall of the reverse gear shaft body (1) is provided with an annular reducing position (7), the right end of the annular reducing position (7) is axially connected with the second limiting groove, the left end of the annular reducing position (7) extends out of the reverse gear (4), the two semicircular leaning rings (6) are oppositely positioned on the annular reducing position (7) outside the reverse gear (4), the two semicircular abutting rings (6) axially move to the annular reducing position (7) in the reverse gear (4) to be axially abutted and matched with the limiting key strips (5).

3. The reverse gear shaft as claimed in claim 2, wherein the two semicircular abutment rings (6) are oppositely formed with an outer diameter adapted to the inner diameter of the annular flared portion of the reverse gear (4), the inner ends of the two semicircular abutment rings (6) are axially fixedly connected with rubber abutment portions (8) respectively by means of vulcanization, and the two semicircular abutment rings (6) are axially abutted and matched with the rubber abutment portions (8) and the limit key strips (5).

4. A reverse shaft according to claim 3, characterised in that the ring-shaped reduction (7) at the left end of the reverse gear wheel (4) has symmetrically arranged radial grooves, in which radial grooves radial pins (9) are arranged, which radial pins (9) axially abut against the two semi-circular abutment rings (6).

5. The reverse gear shaft as claimed in claim 4, wherein an axial embedding groove is formed in the right end face of the reverse gear (4), a rubber ring (10) is fixedly embedded in the axial embedding groove, and the reverse gear shaft body (1) is sleeved with the rubber ring (10).

6. A reverse shaft according to claim 5, characterised in that the rubber abutment (8) extends axially beyond the axial groove of the reverse gear wheel (4).

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