Meshing sleeve limiting device

Abstract

The utility model relates to the technical field of tractor transmission, in particular to an engagement sleeve limiting device which comprises an engagement sleeve body, an internal spline is arranged in the engagement sleeve body, and the small diameters of the two sides of the internal spline are larger than the pitch diameter of the internal spline. The meshing sleeve body, the internal spline, the small diameter of the two sides of the internal spline, the intermediate diameter of the internal spline, the small diameter of the external spline of the splined hub shaft and the small diameter of the external spline of the shift gear are combined for use, so that the small-diameter size difference of spline teeth is formed, the precise limiting function is achieved, it is ensured that the meshing sleeve is effectively limited when moving to a specific position, and the service life of the meshing sleeve is prolonged. And secondly, due to the design of the small-diameter size difference of the spline teeth, reliable torque transmission between the meshing sleeve body and the splined hub shaft and between the meshing sleeve body and the shift gear can be guaranteed through spline fit while the limiting function is guaranteed, and the service life of the shifting fork is prolonged. And the requirement of stable power transmission of a transmission system is met.

Description

Technical Field

[0001] This utility model relates to the field of tractor transmission technology, and in particular to a meshing sleeve limiting device. Background Technology

[0002] The engagement sleeve is a key component in a transmission used to realize power transmission and gear shifting between gears. By moving axially, the sleeve engages with the target gear, and in conjunction with the synchronizer, speed synchronization is achieved, thereby completing gear shifting.

[0003] However, traditional engagement sleeves often lack a limiting structure, and during gear shifting, the engagement sleeve is prone to excessive movement. This not only causes severe wear on the working surface of the shift fork and shortens the service life of the shift fork, but also affects the stable operation of the transmission system due to excessive interference between components. Utility Model Content

[0004] The purpose of this invention is to provide a meshing sleeve limiting device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: it includes a meshing sleeve body, wherein an internal spline is provided within the meshing sleeve body, and the minor diameters on both sides of the internal spline are larger than the median diameter of the internal spline.

[0006] As a preferred embodiment of this utility model, a splined hub shaft is provided inside the internal spline, and an output shaft is provided through the middle of the splined hub shaft.

[0007] As a preferred embodiment of this invention, the minor diameter of the outer spline of the spline hub shaft is smaller than the median diameter of the inner spline.

[0008] As a preferred embodiment of this utility model, a gear is provided on the output shaft on both sides of the splined hub shaft, and an external spline is provided on the gear ring of the gear. The minor diameter of the external spline of the gear is larger than the mean diameter of the internal spline.

[0009] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0010] This invention, through the combination of the engagement sleeve body and the inner spline, and the small diameters on both sides of the inner spline, the middle diameter of the inner spline, the small diameter of the outer spline of the spline hub shaft, and the small diameter of the outer spline of the shift gear, forms a difference in the small diameter of the spline teeth. This achieves a precise limiting function, ensuring that the engagement sleeve is effectively limited by the specific size of the shift gear 8 when it moves to a specific position, avoiding excessive movement. This plays a crucial role in protecting the working surface of the shift fork and effectively extending its service life. Secondly, the design of the small diameter difference of the spline teeth, while ensuring the limiting function, also ensures reliable torque transmission between the engagement sleeve body, the spline hub shaft, and the shift gear through spline engagement, meeting the requirements for stable power transmission in the transmission system. At the same time, it reduces the risk of wear and interference during the engagement of various components, improving the smoothness and reliability of the entire transmission system. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the meshing sleeve body and splined hub shaft structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the meshing sleeve body and the gearing gear of this utility model.

[0014] Reference numerals: 1. Engaging sleeve body; 2. Internal spline; 3. Small diameters on both sides of the internal spline; 4. Middle diameter of the internal spline; 5. Spline hub shaft; 6. Small diameter of the external spline of the spline hub shaft; 7. Output shaft; 8. Gear; 9. External spline; 10. Small diameter of the external spline of the gear. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0016] like Figures 1-3 As shown, the present invention proposes a meshing sleeve limiting device, which includes a meshing sleeve body 1, an inner spline 2 is provided inside the meshing sleeve body 1, the inner spline 2 inside the meshing sleeve body 1 cooperates with the outer spline on the spline hub shaft 5 to realize torque transmission, and the minor diameter 3 on both sides of the inner spline 2 is larger than the middle diameter 4 of the inner spline.

[0017] A splined hub shaft 5 is provided inside the inner spline 2. An output shaft 7 is provided through the middle of the splined hub shaft 5. The splined hub shaft 5 serves as an intermediate component for power transmission. The external spline on the splined hub shaft 5 engages with the internal spline 2 inside the meshing sleeve body 1. At the same time, the output shaft 7 through the middle of the splined hub shaft 5 is used to transmit torque to subsequent components.

[0018] The minor diameter 6 of the outer spline of the spline hub shaft 5 is smaller than the mean diameter 4 of the inner spline. The design of the minor diameter 6 of the outer spline of the spline hub shaft is smaller than the mean diameter 4 of the inner spline, which allows the shift fork system to drive the engagement sleeve body 1 and the inner spline 2 to move during gear shifting.

[0019] Gear shifting gears 8 are provided on the output shafts 7 on both sides of the splined hub shaft 5. The gear ring of the gear shifting gear 8 is provided with an external spline 9. The gear shifting gear 8 receives torque from the input shaft of the transmission system and rotates idling. When the operator performs a gear shifting operation, the external spline 9 on the gear ring of the gear shifting gear 8 cooperates with the meshing sleeve body 1, the internal spline 2 and the splined hub shaft 5 to transmit torque to the output shaft 7, thereby realizing the switching of different gears. The minor diameter 10 of the external spline of the gear shifting gear 8 is larger than the mean diameter 4 of the internal spline. The minor diameter 10 of the external spline of the gear shifting gear is designed to be larger than the mean diameter 4 of the internal spline to match the size of the internal spline 2 inside the meshing sleeve to achieve the limit.

[0020] Working principle: In the transmission system of a vehicle or mechanical equipment, when it is necessary to change gears, the shift fork moves the engagement sleeve body 1 under the action of the operating mechanism. The engagement sleeve body 1 connects with the external spline on the spline hub shaft 5 through the internal spline 2 inside it to realize the transmission of torque. During the movement, due to the design that the minor diameter 3 on both sides of the internal spline is greater than the median diameter 4 of the internal spline, while the minor diameter 6 of the external spline on the spline hub shaft is smaller than the median diameter 4 of the internal spline, and the minor diameter 10 of the external spline of the gear is greater than the median diameter 4 of the internal spline, a difference in the minor diameter of the spline teeth is formed. When the engagement sleeve body 1 and the internal spline 2 move to a specific position, they will be restricted by the specific size of the gear 8, and thus cannot continue to move, realizing the limiting function. This avoids wear on the working surface of the shift fork caused by excessive movement of the engagement sleeve, effectively protects the shift fork, and improves the service life of the shift fork.

[0021] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A meshing sleeve limiting device, comprising: The meshing sleeve body (1) is characterized in that: an internal spline (2) is provided inside the meshing sleeve body (1), and the minor diameter (3) on both sides of the internal spline (2) is greater than the middle diameter (4) of the internal spline.

2. The engagement sleeve limiting device according to claim 1, characterized in that: A spline hub shaft (5) is provided inside the inner spline (2), and an output shaft (7) is provided through the middle of the spline hub shaft (5).

3. The engagement sleeve limiting device according to claim 2, characterized in that: The minor diameter (6) of the outer spline of the spline hub shaft (5) is smaller than the mean diameter (4) of the inner spline.

4. The engagement sleeve limiting device according to claim 3, characterized in that: Both sides of the splined hub shaft (5) are provided with a gear (8), and the gear ring of the gear (8) is provided with an external spline (9). The minor diameter (10) of the external spline of the gear (9) is greater than the middle diameter (4) of the internal spline.

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