CN111895000B

CN111895000B - Inertia type synchronizer assembly

Info

Publication number: CN111895000B
Application number: CN202010605601.0A
Authority: CN
Inventors: 王树彬; 占伟; 邱华; 向盼; 张光哲; 邹锋; 仲大伟
Original assignee: Dongfeng Commercial Vehicle Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-03-18
Anticipated expiration: 2040-06-29
Also published as: CN111895000A

Abstract

The invention discloses an inertial synchronizer assembly. The novel steel ball bearing comprises a sliding gear sleeve, a synchronizing ring, a combined gear ring, a spring piece and a steel ball, wherein a spherical mounting hole is formed in the sliding gear sleeve, a slope boss is arranged on the outer ring of the synchronizing ring, the steel ball is located in a space defined by the spherical mounting hole and the slope boss, and one side of the spring piece is fixed on the sliding gear sleeve and limits the steel ball. The invention adopts the combination of the spring leaf and the steel ball to replace the combination of the push block (the support column) and the spring, and matches with the parts such as the sliding gear sleeve to complete the presynchronization work.

Description

Inertia type synchronizer assembly

Technical Field

The invention belongs to the technical field of transmission variable-speed traveling systems, and particularly relates to an inertial synchronizer assembly.

Background

The existing heavy-duty gearbox main box synchronizer assembly mostly adopts a tooth holder, a tooth sleeve, a combined tooth ring, a synchronizing ring, a spring and a push block (support column) structure. The presynchronization scheme adopts a spring and push block (support column) structure. In the prior art, 3-4 groups of springs and push blocks (push blocks) are combined to achieve the pre-synchronization function, so that the parts are large in variety and quantity, high in cost and difficult to assemble.

Specifically, the conventional synchronizer is shown in fig. 1, and is composed of a sliding gear sleeve 1, a push block (a support column) 2, a synchronizing ring outer ring 3, a synchronizing ring intermediate ring 4, a spring 5, a synchronizing ring inner ring 6, a coupling gear ring 7, a gear seat 8, and other parts. The presynchronization structure mostly adopts a structure similar to a push block (a support column) and a spring and is matched with parts such as a sliding gear sleeve and the like to finish presynchronization work. The working principle is as follows: under the action of thrust, the sliding gear sleeve 1 moves leftwards or rightwards to drive the push block (support column) 2 to swing leftwards and rightwards, and the push block (support column) 2 further pushes the outer ring 3 of the synchronous ring to tightly press the outer ring 3 of the synchronous ring and the middle ring 4 of the synchronous ring, so that presynchronization work is completed.

And continuously increasing the thrust, compressing the spring 5, combining the sliding gear sleeve 1 with the combined gear ring 7 and finishing gear shifting. The spring 5 plays a supporting role for the push block (support column) 2 in the whole process. A synchronizer assembly is usually provided with a combination of 3-4 groups of push blocks (support columns) and springs 5 (shown in combined figures 2 and 3), the combination must be arranged on a tooth holder and cannot be used on a toothless holder structure (mostly used for a rear auxiliary box). And need set up well ejector pad 9 centering, (when the neutral gear, ensure that the slip tooth cover is in the intermediate position), well ejector pad usually has 2 groups, and is a lot of, and the cost is higher.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned shortcomings of the prior art and to provide an inertial synchronizer assembly.

The technical scheme adopted by the invention is as follows: the utility model provides an inertial type synchronizer assembly, includes slip tooth cover, synchronizer ring, combines the ring gear, still includes spring leaf and steel ball, be equipped with spherical mounting hole on the slip tooth cover, the synchronizer ring outer lane is equipped with the slope boss, the steel ball is located the space that spherical mounting hole and slope boss enclose, spring leaf one side is fixed in on the slip tooth cover and is spacing with the steel ball.

In a further preferred structure, the spring plate and the steel balls comprise four or more sets of spring plates and are distributed in four or more spherical mounting holes which are uniformly distributed on the sliding gear sleeve.

In a further preferable structure, the spherical mounting hole is a structure with one large end and the other small end, the aperture phi A of one end of the spherical mounting hole far away from the tooth holder is larger than the diameter phi B of the steel ball, and the diameter phi B of the steel ball is larger than the aperture phi C of the other end of the spherical mounting hole close to the tooth holder.

In a further preferred structure, the outer ring of the synchronizing ring is provided with four or more slope bosses which are uniformly distributed, and the slope angle of each slope boss is smaller than 45 degrees.

In a further preferred configuration, in the neutral state, a distance RD from a lowest point D (a point closest to the synchronizer axis) of the steel ball to the axis of the synchronizer is smaller than a radius RE of the outer ring of the slope boss.

In a further preferred configuration, the synchronizer ring outer ring radius RF is smaller than a distance RD from a synchronizer shaft center to a lowest point D (a point closest to a synchronizer shaft axis) of the steel ball in a neutral state.

In a further preferred structure, the end part of one side of the spring piece is a raised mounting structure, and the mounting structure is fixed on the sliding gear sleeve through a steel needle.

In a further preferable structure, the sliding gear sleeve is in a middle position when the steel ball slides down from the slope boss of the synchronizing ring, namely, when the steel ball is in a neutral position.

In a further preferred structure, the spline on the sliding gear sleeve is combined with the combined gear ring.

In a further preferred structure, a gap is formed between the sliding gear sleeve and the synchronizing ring.

The invention adopts the combination of the spring piece and the steel ball to replace the combination of the push block (the support column) and the spring, and completes the pre-synchronization work by matching with parts such as the sliding gear sleeve and the like.

Drawings

FIG. 1 is a schematic diagram of a prior art heavy duty transmission main case synchronizer assembly;

FIG. 2 is a top view of a heavy duty transmission main case synchronizer;

FIG. 3 is a schematic structural view of a middle push block;

FIG. 4 is a schematic structural view of the present invention;

FIG. 5 is a schematic view of the position of the spring plate and the steel ball;

fig. 6 is a schematic diagram of a synchronous ring structure.

Wherein, 1-sliding gear sleeve, 2-push block, 3-synchronizing ring outer ring, 4-synchronizing ring middle ring, 5-spring, 6-synchronizing ring inner ring, 7-combining gear ring, 8-gear seat, 9-middle push block, 10-spring piece, 11-steel ball and A-synchronizing ring.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.

As shown in fig. 4-6, the invention comprises a sliding gear sleeve 1, a synchronizing ring a, a combination gear ring 7, a spring plate 10 and a steel ball 11, wherein the sliding gear sleeve 1 is provided with a spherical mounting hole 1a, the outer ring of the synchronizing ring a is provided with a slope boss a1, the steel ball 11 is positioned in a space enclosed by the spherical mounting hole 1a and the slope boss a1, and one side of the spring plate 10 is fixed on the sliding gear sleeve 1 and limits the steel ball 11.

In the above scheme, the spring plate 10 and the steel ball 11 include four or more sets, and are distributed in four or more spherical mounting holes 1a which are uniformly distributed on the sliding gear sleeve 1.

The spherical mounting hole 1a is of a structure with one large end and the other small end, the aperture phi A of one end of the spherical mounting hole 1a far away from the tooth holder is larger than the diameter phi B of the steel ball, and the diameter phi B of the steel ball is larger than the aperture phi C of the other end of the spherical mounting hole 1a close to the tooth holder.

In the scheme, the outer ring of the synchronizing ring A is provided with four or more slope bosses A1 which are uniformly distributed, and the slope angle of the slope bosses A1 is smaller than 45 degrees. And in a neutral state, the distance RD between the lowest point D of the steel ball 11 and the axle center of the synchronizer is smaller than the radius RE of the outer ring of the slope boss A1. And the radius RF of the outer ring of the synchronizing ring A is smaller than the distance RD between the lowest point D of the steel ball 11 and the axis of the synchronizer in a neutral gear state.

In the scheme, the end part of one side of the spring piece 10 is a convex mounting structure, and the mounting structure is fixed on the sliding gear sleeve 1 through a steel needle. In the above scheme, when the steel ball 11 slides down from the slope boss a1 of the synchronizing ring, i.e. when the synchronizing ring is in neutral, the sliding gear sleeve 1 is in the middle position.

In the scheme, the spline of the sliding gear sleeve 1 is combined with the combined gear ring 7.

In the scheme, a gap is formed between the sliding gear sleeve 1 and the synchronizing ring A.

The working principle of the invention is as follows: under the action of thrust, the sliding gear sleeve 1 moves leftwards or rightwards to drive the steel ball 11 to move leftwards or rightwards, and when the steel ball 11 is contacted with the slope boss A1 on the synchronizing ring A, the synchronizing ring A is further pushed to move, so that the inner conical surface of the synchronizing ring A is pressed against the outer conical surface of the combined gear ring 7, and presynchronization work is completed. The inner conical surface of the synchronizing ring A rubs with the outer conical surface of the combining toothed ring 7 to complete the function of synchronizing the rotating speed. The pushing force is continuously applied, and the spring piece 10 is jacked up by the steel ball 11. The steel ball 11 passes over the slope boss A1 of the synchronizing ring, and the sliding gear sleeve 1 is combined with the combination gear ring 7 to complete gear shifting. The scheme adopts the combination of the steel ball and the spring piece, and can be used for the synchronizer which is limited by space or other parts and has no tooth seat structure on the premise of equivalent performance. When the steel ball 11 slides down from the slope boss A1 of the synchronizing ring, the sliding gear sleeve is in a middle position (from gear engaging to gear disengaging), and a middle position push block 9 structure is not needed. The presynchronization structure (push block and spring combination) of the existing synchronizer must be supported by the tooth holder 8. In the auxiliary box, the tooth holder 8 is not necessary, and the synchronizer can be used for synchronizers which are limited by space or other parts and have no tooth holder structure on the premise of equivalent performance by adopting the combination of the steel ball and the spring piece. The structure is particularly suitable for the synchronizer structure of the rear auxiliary box.

Those not described in detail in this specification are within the skill of the art.

Claims

1. An inertial type synchronizer assembly, includes slip ring gear (1), synchronizer ring (A), combines ring gear (7), its characterized in that: the synchronous ring is characterized by further comprising a spring piece (10) and a steel ball (11), wherein a spherical mounting hole (1a) is formed in the sliding gear sleeve (1), a slope boss (A1) is arranged on the outer ring of the synchronous ring (A), the steel ball (11) is located in a space formed by the spherical mounting hole (1a) and the slope boss (A1) in a surrounding mode, and one side of the spring piece (10) is fixed on the sliding gear sleeve (1) and limits the steel ball (11); the spherical mounting hole (1a) is of a structure with one large end and the other small end, the aperture phi A of one end of the spherical mounting hole (1a), which is far away from the tooth holder, is larger than the diameter phi B of the steel ball, and the diameter phi B of the steel ball is larger than the aperture phi C of the other end of the spherical mounting hole (1a), which is close to the tooth holder; the outer ring of the synchronizing ring (A) is provided with four or more slope bosses (A1) which are uniformly distributed, and the slope angle of the slope bosses (A1) is less than 45 degrees; the distance RD between the lowest point D of the steel ball (11) and the axis of the synchronizer is smaller than the radius RE of the outer ring of the slope boss (A1); the radius RF of the outer ring of the synchronizing ring (A) is smaller than the distance RD between the lowest point D of the steel ball (11) and the axis of the synchronizer in a neutral gear state; the end part of one side of the spring piece (10) is provided with a convex mounting structure, and the mounting structure is fixed on the sliding gear sleeve (1) through a steel needle; when the steel ball (11) slides down from the slope boss (A1) of the synchronizing ring, namely when the synchronizing ring is in neutral, the sliding gear sleeve (1) is in the middle position.

2. An inertial synchronizer assembly according to claim 1, wherein: the spring piece (10) and the steel ball (11) comprise four or more sets which are distributed in four or more spherical mounting holes (1a) which are uniformly distributed and correspond to the sliding gear sleeve (1).

3. An inertial synchronizer assembly according to claim 1, wherein: the spline of the sliding gear sleeve (1) is combined with the combined gear ring (7).

4. An inertial synchronizer assembly according to claim 1, wherein: a gap is arranged between the sliding gear sleeve (1) and the synchronizing ring (A).