Lightweight intermediate shaft assembly and four-gear transmission

Abstract

The light-weight intermediate shaft assembly comprises an intermediate shaft body, the intermediate shaft body comprises a first connecting section and a second connecting section which are integrally connected from front to back, and a second-gear gear is arranged outside the connecting position of the first connecting section and the second connecting section in a sleeved mode. The outer diameter of the first connecting section and the outer diameter of the second connecting section are both smaller than the outer diameter of the second-gear gear. The head end of the first connecting section is sleeved with an intermediate shaft front bearing, and the tail end of the second connecting section is sleeved with an intermediate shaft rear bearing. A third-gear and fourth-gear duplicate gear is further arranged outside the first connecting section between the intermediate shaft front bearing and the second-gear gear in a sleeving mode. According to the utility model, by arranging the integrated third-gear and fourth-gear duplicate gear, the matching length of the third-gear gear and the fourth-gear gear with the intermediate shaft body is increased, and the shaft diameter of the mounting position of the third-gear and fourth-gear gear is reduced, so that the stability and the reliability of gear transmission are improved under the condition that the interference torque transmission capability is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to commercial vehicle transmission technical field, concretely relates to a lightweight intermediate shaft assembly and four gear transmission. BACKGROUND

[0002] With the continuous development of new energy commercial vehicle, the lightweight and reliability of transmission are put forward to higher requirements, the lightweight of transmission can reduce the whole vehicle weight, improves the cruising range, and high reliability is the key to ensure that new energy vehicle stably operates under various working conditions. In the prior art, the traditional four gear transmission intermediate shaft assembly is composed of a shaft tooth and two piece gears, this structure can meet the basic transmission demand although, the weight of intermediate shaft assembly is larger, difficult to meet the lightweight requirement of new energy vehicle transmission, and the assembly mode of intermediate shaft assembly is manual assembly, limited by structure, is prone to assembly error, and improvement is urgently needed. SUMMARY

[0003] In view of the existing technical problems at present, the utility model aims at providing a lightweight intermediate shaft assembly and four gear transmission to solve the technical problem that the transmission in the prior art is difficult to meet the lightweight requirement of new energy commercial vehicle transmission.

[0004] In order to realize the above-mentioned purpose, the utility model discloses the following technical scheme:

[0005] A lightweight intermediate shaft assembly, comprising an intermediate shaft body, the intermediate shaft body comprises a first connecting section and a second connecting section which are integrally connected from front to back, a two gear is provided on the connecting portion of the first connecting section and the second connecting section, and the outer diameter of the first connecting section and the second connecting section is smaller than the outer diameter of the two gear;

[0006] The first connecting section head end is externally provided with an intermediate shaft front bearing, and the second connecting section tail end is externally provided with an intermediate shaft rear bearing;

[0007] The first connecting section between the intermediate shaft front bearing and the two gear is further externally provided with a three-four gear double gear.

[0008] The utility model also has the following technical features:

[0009] Specifically, the three-four gear double gear comprises a gear body, the gear body front end is outwardly protruded to form a four gear, the gear body rear end is outwardly protruded to form a three gear, and the diameter of the four gear is larger than that of the three gear.

[0010] Further, the gear body and the intermediate shaft body are connected through a pin.

[0011] Further, a plurality of first radial mounting holes are equidistantly arranged on the gear body in the circumferential direction, a plurality of second radial mounting holes corresponding to the first radial mounting holes are arranged on the intermediate shaft body in the circumferential direction, and the pin is arranged in the first radial mounting hole and the second radial mounting hole.

[0012] Further, a gear is arranged on the second connecting section.

[0013] Further, a plurality of lightening grooves are arranged on the outer surface of the gear body.

[0014] Further, the plurality of lightening grooves are equidistantly arranged on the gear body in the circumferential direction.

[0015] The application also protects a four-gear transmission, wherein the four-gear transmission is provided with the above-mentioned lightweight intermediate shaft assembly.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] (1) The lightweight intermediate shaft assembly provided by the application is provided with an integrated three-four-gear double gear, so that the matching length of the three-gear gear and the four-gear gear with the intermediate shaft body is increased, and the shaft diameter of the three-four-gear gear installation position can be reduced under the condition of the increased matching length, the gear transmission stability and reliability are improved without affecting the interference transmission torque capacity, the weight of the three-four-gear double gear is reduced, a plurality of lightening grooves are arranged on the double gear, the weight of the three-four-gear double gear is further reduced, the three-four-gear gear can be machined in an integrated manner after the three-four-gear gear is changed into an integrated double gear, the position degree requirement is more finely ensured, the assembly requirement is simplified, and the assembly of the gear is more convenient.

[0018] (2) The four-gear transmission provided by the application realizes the dual goals of lightweight and high reliability through innovative design, and the overall performance is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the application, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the lightweight intermediate shaft assembly of the application.

[0021] Figure 2 It is a schematic diagram of the local structure of the four-gear transmission of the application.

[0022] Reference numerals in the drawings:

[0023] 1-intermediate shaft body, 2-second gear, 3-intermediate shaft front bearing, 4-intermediate shaft rear bearing, 5-third and fourth gear double gear, 6-pin, 7-first gear, 8-transmission front housing, 9-transmission rear housing, 10-second shaft assembly; 11-first connecting section, 12-second connecting section; 51-gear body, 52-fourth gear, 53-third gear; 101-second shaft body, 102-second shaft third gear, 103-second shaft second gear, 104-second shaft first gear, 105-connecting bearing, 106-second shaft rear bearing, 107-first shaft gear, 108-first shaft bearing.

[0024] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0025] The following specific embodiments of the present application are given, it should be noted that the present application is not limited to the following specific embodiments, any equivalent variations made on the basis of the technical scheme of the present application fall within the protection scope of the present application.

[0026] The terms "upper", "lower", "front", "rear" and the like used in the present application indicate the orientation or positional relationship only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and "inner" and "outer" refer to the inner and outer contours of the corresponding components. The above terms should not be understood as limiting the present application. In the present application, the orientation is described as shown in the drawings. Figure 2

[0027] In addition, the ordinal numbers "first", "second" and the like are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0028] In the present application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly without making the opposite statement, for example, it can be fixedly connected, or it can be detachably connected or integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Unless otherwise specified, the components in the present application can be purchased from the market.​

[0030] Example 1

[0031] Following the above technical solutions, such as Figure 1 As shown, this embodiment provides a lightweight intermediate shaft assembly, including an intermediate shaft body 1. The intermediate shaft body 1 includes a first connecting section 11 and a second connecting section 12 that are integrally connected from front to back. A second gear 2 is sleeved at the connection between the first connecting section 11 and the second connecting section 12. The outer diameter of the first connecting section 11 and the outer diameter of the second connecting section 12 are both smaller than the outer diameter of the second gear 2.

[0032] The first connecting section 11 has a front intermediate shaft bearing 3 sleeved on the outside of its head end, and the second connecting section 12 has a rear intermediate shaft bearing 4 sleeved on the outside of its tail end.

[0033] A third and fourth gear double gear 5 is also fitted outside the first connecting section 11 between the intermediate shaft front bearing 3 and the second gear 2.

[0034] The third and fourth gear double gear 5 is interference-fitted with the intermediate shaft body 1, transmitting power through interference torque. The fit length affects the torque transmission capability; the longer the fit length, the stronger the torque transmission capability. The double gear design of the third and fourth gear double gear 5 increases the fit length, thereby improving the torque transmission capability. The third and fourth gear double gear 5 adopts an integrated structure, which better meets the positional accuracy requirements and simplifies the assembly process.

[0035] As a preferred embodiment, the three- and four-speed double gear 5 includes a gear body 51, with a through hole axially formed inside the gear body 51. The first connecting section 11 passes through the through hole. The front end of the gear body 51 protrudes outward to form a four-speed gear 52, and the rear end of the gear body 51 protrudes outward to form a three-speed gear 53. The diameter of the four-speed gear 52 is larger than the diameter of the three-speed gear 53.

[0036] As a preferred embodiment, the gear body 51 and the intermediate shaft body 1 are connected by a pin 6.

[0037] As a preferred embodiment, the gear body 51 is provided with a plurality of first radial mounting holes at equal intervals along the circumference, and the intermediate shaft body 1 is provided with a plurality of second radial mounting holes that correspond one-to-one with the first radial mounting holes along the circumference. The pin 6 passes through the first radial mounting holes and the second radial mounting holes.

[0038] As a preferred embodiment, a gear 7 is also fitted on the second connecting section 12.

[0039] As a preferred embodiment, the outer surface of the gear body 51 is provided with multiple weight-reducing grooves.

[0040] As a preferred scheme of the embodiment, the plurality of weight reduction grooves are arranged at equal intervals in the circumferential direction of the gear body 51.

[0041] Embodiment 2

[0042] According to the above technical scheme, as shown in the embodiment, a four-gear transmission is provided, and the lightweight intermediate shaft assembly disclosed in Embodiment 1 is arranged in the four-gear transmission. Figure 2

[0043] In the embodiment, the four-gear transmission comprises a transmission front housing 8 and a transmission rear housing 9 which are connected and arranged, and an installation cavity is formed in the transmission front housing 8 and the transmission rear housing 9, and the lightweight intermediate shaft assembly is arranged in the installation cavity and connected with the transmission front housing 8 through an intermediate shaft front bearing and connected with the transmission rear housing 9 through an intermediate shaft rear bearing.

[0044] The installation cavity further comprises a two-shaft assembly 10, and the two-shaft assembly 10 comprises a two-shaft body 101, and the two-shaft body 101 is sequentially provided with a two-shaft third-gear gear 102, a two-shaft second-gear gear 103 and a two-shaft first-gear gear 104 in the front-to-rear direction; a connecting bearing 105 is sleeved on the front end of the two-shaft body 101, a two-shaft rear bearing 106 is sleeved on the rear end of the two-shaft body 101, and a one-shaft gear 107 is sleeved on the connecting bearing 105, and the one-shaft gear 107 is connected with the inner ring of a one-shaft bearing 108 arranged in the transmission front housing 8 in an interference fit.

[0045] The one-shaft gear 107 is engaged with the four-gear gear 52 of the three-four-gear double-gear gear 5, the two-shaft third-gear gear 102 is engaged with the three-gear gear 53 of the three-four-gear double-gear gear 5, the two-shaft second-gear gear 103 is engaged with the two-gear gear 2, and the two-shaft first-gear gear 104 is engaged with the one-gear gear 7.

[0046] In use, the power of the intermediate shaft body 1 is transmitted to the two-shaft body 101 through the gears of the intermediate shaft assembly and the two-shaft assembly and then output.​

Claims

1. A lightweight intermediate shaft assembly comprising an intermediate shaft body (1), characterized in that, The intermediate shaft body (1) comprises a first connecting section (11) and a second connecting section (12) integrally connected from front to back, and an outer sleeve of a junction of the first connecting section (11) and the second connecting section (12) is provided with a two-gear gear (2), and an outer diameter of the first connecting section (11) and an outer diameter of the second connecting section (12) are both smaller than an outer diameter of the two-gear gear (2); An outer part of a head end of the first connecting section (11) is externally provided with an intermediate shaft front bearing (3), and an outer part of a tail end of the second connecting section (12) is externally provided with an intermediate shaft rear bearing (4); An outer part of the first connecting section (11) between the intermediate shaft front bearing (3) and the two-gear gear (2) is further externally provided with a three-four-gear double-gear gear (5).

2. The lightweight intermediate shaft assembly of claim 1, wherein, The three-four-gear double-gear gear (5) comprises a gear body (51), an outer part of a front end of the gear body (51) is protruded to form a four-gear gear (52), an outer part of a rear end of the gear body (51) is protruded to form a three-gear gear (53), and a diameter of the four-gear gear (52) is greater than a diameter of the three-gear gear (53).

3. The lightweight intermediate shaft assembly of claim 2, wherein, The gear body (51) and the intermediate shaft body (1) are connected through a pin (6).

4. The lightweight intermediate shaft assembly of claim 3, wherein, A plurality of first radial mounting holes are equidistantly arranged on the gear body (51) in a circumferential direction, a plurality of second radial mounting holes capable of one-to-one corresponding to the first radial mounting holes are arranged on the intermediate shaft body (1) in the circumferential direction, and the pin (6) is arranged in the first radial mounting hole and the second radial mounting hole.

5. The lightweight intermediate shaft assembly of claim 1, wherein, The second connecting section (12) is further externally provided with a one-gear gear (7).

6. The lightweight intermediate shaft assembly of claim 2, wherein, An outer surface of the gear body (51) is provided with a plurality of lightening grooves.

7. The lightweight intermediate shaft assembly of claim 6, wherein, The plurality of lightening grooves are equidistantly arranged on the gear body (51) in the circumferential direction.

8. A four-speed transmission characterized by, The four-gear transmission is provided with the lightweight intermediate shaft assembly as claimed in any one of claims 1 to 7.

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