Transmission coupling

Abstract

The utility model discloses a transmission coupler. The transmission coupler comprises a first connecting end and a second connecting end, the first connecting end is connected with the second connecting end, the first connecting end is connected with the power take-off mechanism input shaft, the second connecting end is connected with the transmission intermediate shaft, and the power take-off mechanism input shaft and the transmission intermediate shaft can achieve force transmission through the coupler. According to the power take-off mechanism, the coupler is introduced to serve as a connecting piece between the power take-off mechanism input shaft and the transmission intermediate shaft, the power take-off mechanism input shaft can be shortened, the deflection problem of the power take-off mechanism input shaft is remarkably reduced, the shaft breaking risk is reduced, and then the stability and reliability of the whole power take-off mechanism are improved. Meanwhile, the coupler is adopted, so that the risk of insufficient strength caused by thinner wall thickness of the designed internal spline can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of transmissions, in particular to a transmission coupling. Background Art

[0002] In the design of the transmission, the matching of the power take-off mechanism is a key link. Some OEMs tend to take power from the intermediate shaft of the main box when matching the through-shaft power take-off or other through-shaft power take-off mechanisms. However, this design method often faces some technical challenges in practical applications.

[0003] First, when the transmission rear cover housing is long, there is a certain distance between the input shaft of the power take-off mechanism and the intermediate shaft of the transmission, and the length of the input shaft of the power take-off mechanism is usually lengthened. However, as the length of the input shaft increases, its deflection also increases. When subjected to external forces, the input shaft is more likely to bend and deform, thereby increasing the risk of fracture. In actual applications, many cases of input shaft fractures of through-shaft power take-offs have occurred.

[0004] Secondly, the connection method between the input shaft of the power take-off mechanism and the intermediate shaft of the transmission is that the shaft head of the input shaft of the power take-off mechanism is generally designed as an external spline, and the shaft head of the intermediate shaft of the transmission is generally designed as an internal spline. This design can achieve a close connection between the power take-off mechanism and the intermediate shaft, ensuring the effective transmission of power. However, when the shaft head diameter of the intermediate shaft of the transmission is small, the design of the internal spline will face the problem of insufficient strength. Due to the small shaft head diameter, the wall thickness of the internal spline is thin, and it cannot withstand large torque and impact force, thus affecting the stability and reliability of the entire power take-off mechanism. Utility Model Content

[0005] The utility model aims to provide a transmission coupling to solve the technical problems faced in practical applications such as large deflection of the input shaft and insufficient strength when the shaft head of the transmission intermediate shaft is an internal spline.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A transmission coupling comprises a first connecting end and a second connecting end, the first connecting end and the second connecting end are connected, the first connecting end is connected to the shaft head of the input shaft of the power take-off mechanism, and the second connecting end is connected to the shaft head of the transmission intermediate shaft, and the input shaft of the power take-off mechanism and the transmission intermediate shaft can transmit force through the coupling.

[0008] The first connecting end is connected to the shaft head of the input shaft of the power take-off mechanism by using a spline.

[0009] When the first connection end adopts an internal spline, the shaft head of the input shaft of the power take-off mechanism is an external spline; when the first connection end is an external spline, the shaft head of the input shaft of the power take-off mechanism is an internal spline.

[0010] The second connecting end is connected to the transmission intermediate shaft by a spline.

[0011] When the second connecting end adopts an internal spline, the shaft head of the transmission intermediate shaft is an external spline; when the second connecting end is an external spline, the shaft head of the transmission intermediate shaft is an internal spline.

[0012] The spline connection is a rectangular spline or an involute spline.

[0013] The coupling is integrally formed and made of steel.

[0014] The coupling is provided with a middle part according to requirements, and both ends of the middle part are respectively connected to the first connection end and the second connection end, and the middle part is a cavity or solid.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model introduces a coupling as a connecting piece between the input shaft of the power take-off mechanism and the intermediate shaft of the transmission. Compared with directly lengthening the input shaft of the power take-off mechanism, this solution can shorten the input shaft of the power take-off mechanism, significantly reduce the deflection problem of the input shaft of the power take-off mechanism, reduce the risk of shaft breakage, and thus improve the stability and reliability of the entire power take-off mechanism. At the same time, the use of a coupling can avoid the risk of insufficient strength caused by the thin wall thickness of the internal spline design. Even if the diameter of the shaft head of the intermediate shaft of the transmission is small, the shaft head can be set as an external spline, thereby achieving matching with the power take-off mechanism.

[0017] Furthermore, the utility model also adopts rectangular splines or involute splines as the connection mode, and this spline connection has the advantages of compact structure, high transmission efficiency, large load-bearing capacity, etc. At the same time, the coupling adopts an integrated molding design and is made of steel, which ensures its good mechanical properties and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a power take-off mechanism matching an existing transmission;

[0020] Figure 2 This is a schematic diagram of the assembly of the transmission coupling of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the transmission coupling of the utility model;

[0022] Figure 4 It is a right side view of the transmission coupling of the utility model;

[0023] Figure 5 It is a left side view of the transmission coupling of the utility model;

[0024] Figure 6 It is a shaft side view of the first connection end side of the transmission coupling of the utility model;

[0025] Figure 7 It is a shaft side view of the second connection end side of the transmission coupling of the utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the intermediate shaft of the transmission of the utility model;

[0027] Fig. 9 This is a schematic diagram of the structure of the input shaft of the power take-off mechanism of the utility model;

[0028] In the figure: 1, power take-off mechanism input shaft; 2, transmission intermediate shaft; 3, coupling; 301, first connecting end; 302, second connecting end. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] The utility model is further described in detail below with reference to the accompanying drawings:

[0036] like Figure 1 As shown, the existing connection method between the input shaft of the power take-off mechanism and the intermediate shaft of the transmission is that the shaft head of the input shaft of the power take-off mechanism is an external spline, and the shaft head of the intermediate shaft of the transmission is an internal spline, and the two realize force transmission through the splines.

[0037] like Figure 2-3 As shown, a transmission coupling of the utility model, the coupling 3 includes a first connecting end 301 and a second connecting end 302, the first connecting end 301 and the second connecting end 302 are connected, the first connecting end 301 is connected to the shaft head of the power take-off mechanism input shaft 1, the second connecting end 302 is connected to the shaft head of the transmission intermediate shaft 2, and the power take-off mechanism input shaft and the transmission intermediate shaft can transmit force through the coupling 3.

[0038] like Figure 4-7As shown, the first connection end 301 is spline-connected to the shaft head of the power take-off mechanism input shaft 1. When the first connection end 301 is internally splined, the shaft head of the power take-off mechanism input shaft 1 is externally splined. When the first connection end 301 is externally splined, the shaft head of the power take-off mechanism input shaft 1 is internally splined. The second connection end 302 is spline-connected to the shaft head of the transmission intermediate shaft 2. When the second connection end 302 is internally splined, the shaft head of the transmission intermediate shaft 2 is externally splined. When the second connection end 302 is externally splined, the shaft head of the transmission intermediate shaft 2 is internally splined. When the shaft head diameter of the transmission intermediate shaft 2 is small, the shaft head of the transmission intermediate shaft 2 is set to externally splined.

[0039] The spline connection is a rectangular spline or an involute spline.

[0040] The coupling 3 is integrally formed and made of steel.

[0041] The coupling 3 is provided with a middle part according to the requirements, and the two ends of the middle part are respectively connected to the first connection end 301 and the second connection end 302, and the middle part is a cavity or solid.

[0042] The utility model introduces a coupling as a connecting piece between the input shaft of the power take-off mechanism and the intermediate shaft of the transmission. Compared with directly lengthening the input shaft of the power take-off mechanism, this solution can shorten the input shaft of the power take-off mechanism, significantly reduce the deflection problem of the input shaft of the power take-off mechanism, reduce the risk of shaft breakage, and thus improve the stability and reliability of the entire power take-off mechanism. At the same time, the use of a coupling can avoid the risk of insufficient strength caused by the thin wall thickness of the internal spline design. Even if the diameter of the shaft head of the intermediate shaft of the transmission is small, the shaft head can be set as an external spline, thereby achieving matching with the power take-off mechanism.

[0043] Example 1

[0044] like Figure 2-7 As shown, the transmission coupling of this embodiment, the coupling 3 includes a first connecting end 301 and a second connecting end 302, the first connecting end 301 and the second connecting end 302 have cavities inside, the first connecting end 301 and the second connecting end 302 are connected to form the coupling 3, the first connecting end 301 adopts an internal spiral spline, and the shaft head of the power take-off mechanism input shaft 1 adopts an external spiral spline, the internal spiral spline of the first connecting end 301 and the external spiral spline of the shaft head of the power take-off mechanism input shaft 1 are matched to achieve force transmission, the second connecting end 302 adopts an internal rectangular spline, and the shaft head of the transmission intermediate shaft 2 adopts an external rectangular spline, the internal rectangular spline of the second connecting end 302 and the external rectangular spline of the shaft head of the transmission intermediate shaft 2 are matched and connected to achieve force transmission.

[0045] Example 2

[0046] The transmission coupling of this embodiment, the coupling 3 includes a first connecting end 301 and a second connecting end 302, the first connecting end 301 and the second connecting end 302 are solid cylinders, the first connecting end 301 and the second connecting end 302 are connected to form the coupling 3, the first connecting end 301 adopts an external spiral spline, and the shaft head of the power take-off mechanism input shaft 1 adopts an internal spiral spline, the external spiral spline of the first connecting end 301 and the internal spiral spline of the shaft head of the power take-off mechanism input shaft 1 are matched to achieve force transmission, the second connecting end 302 adopts an external rectangular spline, and the shaft head of the transmission intermediate shaft 2 adopts an internal rectangular spline, the external rectangular spline of the second connecting end 302 and the internal rectangular spline of the shaft head of the transmission intermediate shaft 2 are matched and connected to achieve force transmission.

[0047] like Figure 8-9 As shown, the shaft head of the transmission intermediate shaft 2 can be lengthened as needed. During assembly, the first connecting end 301 of the coupling 3 is first connected to the transmission intermediate shaft 2, and then the input shaft 1 of the power take-off mechanism is connected to the second connecting end 302 of the coupling 3 to achieve force transmission.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. A transmission coupling, characterized in that: The coupling (3) comprises a first connecting end (301) and a second connecting end (302), the first connecting end (301) and the second connecting end (302) being connected, the first connecting end (301) being connected to the shaft head of the input shaft (1) of the power take-off mechanism, and the second connecting end (302) being connected to the shaft head of the transmission intermediate shaft (2), and the input shaft of the power take-off mechanism and the transmission intermediate shaft can achieve force transmission through the coupling (3).

2. A transmission coupling according to claim 1, characterized in that: The first connecting end (301) is connected to the shaft head of the power take-off mechanism input shaft (1) by means of a spline.

3. A transmission coupling according to claim 2, characterized in that: When the first connection end (301) adopts an internal spline, the shaft head of the power take-off mechanism input shaft (1) is an external spline; when the first connection end (301) is an external spline, the shaft head of the power take-off mechanism input shaft (1) is an internal spline.

4. A transmission coupling according to claim 1, characterized in that: The second connection end (302) is connected to the shaft head of the transmission intermediate shaft (2) by means of a spline.

5. A transmission coupling according to claim 4, characterized in that: When the second connection end (302) adopts an internal spline, the shaft head of the transmission intermediate shaft (2) is an external spline; when the second connection end (302) is an external spline, the shaft head of the transmission intermediate shaft (2) is an internal spline.

6. A transmission coupling according to any one of claims 2 or 4, characterized in that: The spline connection is a rectangular spline or an involute spline.

7. A transmission coupling according to claim 1, characterized in that: The coupling (3) is integrally formed and made of steel.

8. A transmission coupling according to claim 1, characterized in that: The coupling (3) is provided with a middle part according to requirements, and the two ends of the middle part are respectively connected to the first connection end (301) and the second connection end (302), and the middle part is hollow or solid.

Images