A drive axle half shaft

Abstract

The present invention discloses a driving axle half shaft, including an axle body, a flange and a bridge housing, one end of the axle body is connected to a brake drum through the flange, and the other end is connected to a differential, a receiving cavity is formed in the bridge housing, the axle body is received in the receiving cavity, and the axle body and the flange are detachably connected; it also includes: a flange, which extends away from the axle body along the circumferential direction of the axle body, and the flange is arranged between the flange and the differential. By detachably connecting the axle body and the flange, stress concentration can be avoided at the connection between the axle body and the flange; by setting the flange, the gear oil attached to the axle body can be thrown toward the direction of the differential by the action of centrifugal force, greatly reducing the flow of the gear oil toward the direction of the flange, thereby sealing the gear oil in the differential and avoiding oil leakage from the outer end of the driving axle hub.

Description

Technical Field

[0001] The invention relates to the field of motor tricycles, in particular to a drive axle half shaft used for a motor tricycle. Background Art

[0002] At present, the structure adopted by the half shaft 100' of the tricycle drive axle is mostly a disc structure. Figure 1 As shown, it is mainly composed of an integrated flange 20' and an axle body 10'. Due to the stress concentration defect at the joint between the flange 20' and the axle body 10', the drive axle half shaft 100' is easily broken at this location. Generally, the half shaft of this structural form will be provided with an oil seal platform 101' on the axle body 10' for adapting the oil seal to seal the gear oil. The sealing reliability of this structure is poor, and oil leakage from the outer end of the drive axle hub often occurs. Summary of the invention

[0003] This solution is aimed at the problems and needs raised above. One purpose of the present invention is to propose a drive axle half shaft, which can achieve the above technical purpose and bring about other multiple technical effects by adopting the following technical features.

[0004] A drive axle half shaft according to the present invention comprises an axle body, a flange and an axle housing, one end of the axle body is connected to a brake drum via the flange, and the other end thereof is connected to a differential, a receiving cavity is formed in the axle housing, and the axle body is received in the receiving cavity, and is characterized in that:

[0005] The shaft body and the flange are detachably connected;

[0006] Also includes:

[0007] The flange extends away from the axle body along the circumferential direction of the axle body, and the flange is arranged between the flange plate and the differential.

[0008] In this technical solution, when the drive axle half shaft is working, the gear oil in the differential flows toward the flange. By detachably connecting the shaft body and the flange, stress concentration can be avoided at the connection between the shaft body and the flange. By setting the flange, the gear oil attached to the shaft body can be thrown onto the first housing part and flowed toward the differential by centrifugal force, which greatly reduces the flow of the gear oil toward the flange, thereby sealing the gear oil in the differential and avoiding oil leakage from the outer end of the drive axle hub. The structure is simple and the reliability is strong.

[0009] In addition, the drive axle half shaft according to the present invention may also have the following technical features:

[0010] In one example of the present invention, the bridge housing includes a first housing portion and a second housing portion coaxially arranged along the axial direction from one end of the differential to one end of the flange;

[0011] Wherein, the flange is arranged near the connection between the first shell part and the second shell part;

[0012] The inner diameter D1 of the first shell portion is greater than the inner diameter D2 of the second shell portion.

[0013] In an example of the present invention, a connection point between the first shell portion and the second shell portion is located on a side of the flange close to the flange plate.

[0014] In an example of the present invention, the outer diameter D of the flange and the inner diameter D1 of the first shell portion and the inner diameter D2 of the second shell portion satisfy: 0.8D2<D<D1.

[0015] In an example of the present invention, a chamfer is configured at a connection point between the first shell portion and the second shell portion.

[0016] In one example of the present invention, a span L1 of the second housing in the axial direction is not less than a span L2 of the brake drum in the axial direction.

[0017] In an example of the present invention, the shaft body and the flange are connected by a key.

[0018] In one example of the present invention, external splines are provided along the outer surface of the shaft body;

[0019] The flange is provided with a connecting hole, and an internal spline matched with the external spline is provided along the inner surface of the connecting hole.

[0020] In one example of the present invention, the shaft body further includes:

[0021] A sealing member is sleeved on the shaft and arranged close to the flange.

[0022] In one example of the present invention, the shaft body further includes:

[0023] A spiral groove, the spiral groove is distributed along the circumferential direction of the shaft body and extends from an end close to the flange to an end away from the flange;

[0024] Wherein, the sealing member is sleeved on the outer side of the spiral groove.

[0025] The best embodiment for carrying out the present invention will be described in more detail below with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0027] Figure 1 is a schematic structural diagram of an existing drive axle half shaft according to an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of a drive axle half shaft according to an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the structure of the shaft body according to an embodiment of the present invention.

[0030] List of reference numerals:

[0031] Drive axle half shaft 100';

[0032] Axle body 10';

[0033] Oil seal table 101';

[0034] Flange 20';

[0035] Brake drum 300;

[0036] Differential 200;

[0037] Drive axle half shaft 100;

[0038] Axis body 10;

[0039] Flange 11;

[0040] Spiral groove 12;

[0041] External spline 13;

[0042] Flange 20;

[0043] Axle housing 30;

[0044] A first housing portion 31;

[0045] A second housing portion 32;

[0046] Accommodating chamber 30A;

[0047] Connection 301;

[0048] Chamfer 302;

[0049] Seal 40. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described 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.

[0051] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] According to a first aspect of the present invention, a drive axle half shaft 100 is Figure 2 and Figure 3 As shown, it includes an axle body 10, a flange 20 and a bridge housing 30. One end of the axle body 10 is connected to the brake drum 300 through the flange 20, and the other end is connected to the differential 200. A receiving cavity 30A is formed in the bridge housing 30, and the axle body 10 is received in the receiving cavity 30A.

[0053] The shaft body 10 and the flange 20 are detachably connected;

[0054] Also includes:

[0055] The flange 11 extends away from the shaft body 10 along the circumferential direction of the shaft body 10 , and the flange 11 is disposed between the flange 20 and the differential 200 .

[0056] When the drive axle half shaft 100 is working, the gear oil in the differential 200 flows toward the flange 20. By detachably connecting the shaft body 10 and the flange 20, stress concentration can be avoided at the connection between the shaft body 10 and the flange 20. By setting the flange 11, the gear oil attached to the shaft body 10 can be thrown onto the first housing part 31 and flowed toward the differential 200 by centrifugal force, which greatly reduces the flow of the gear oil toward the flange 20, thereby sealing the gear oil in the differential 200 and avoiding oil leakage from the outer end of the drive axle hub. In addition, the structure is simple and the reliability is strong.

[0057] It should be noted that the flange 11 extends circumferentially away from the shaft body 10 along the circumferential direction of the shaft body 10; of course, the flange 11 may also be arranged at intervals along the circumferential direction of the shaft body 10 and extend in a direction away from the shaft body 10;

[0058] It is worth noting that, in the case of an interval setting, the flange 10 can be an arc structure arranged at equal intervals along the circumferential direction, or a spiral blade structure arranged along the circumferential direction, wherein the spiral blade throws the gear oil toward the differential 200 at an inclined angle when rotating.

[0059] In one example of the present invention, the bridge housing 30 includes a first housing portion 31 and a second housing portion 32 coaxially arranged along the axial direction from one end of the differential 200 to one end of the flange 20;

[0060] The flange 11 is disposed near a connection point 301 between the first housing portion 31 and the second housing portion 32;

[0061] The inner diameter D1 of the first shell portion 31 is greater than the inner diameter D2 of the second shell portion 32;

[0062] By designing the inner diameter of the second housing portion 32 to be smaller than the inner diameter of the first housing portion 31 , the weight of the drive axle flange 20 can be reduced, thereby improving the performance of the drive axle half shaft 100 .

[0063] In one example of the present invention, the connection point 301 between the first housing portion 31 and the second housing portion 32 is located on a side of the flange 11 close to the flange 20;

[0064] Specifically, since the flange 11 is arranged close to the first housing portion 31 and the second housing portion 32, the gear oil is thrown onto the first housing portion 31 under the action of the flange 11. Since the inner diameter D2 of the second housing portion 32 is smaller than the inner diameter D1 of the first housing portion 31, the probability of the gear oil flowing toward the flange 20 can be reduced, thereby playing a role of local sealing.

[0065] In one example of the present invention, the outer diameter D of the flange 11 and the inner diameter D1 of the first shell portion 31 and the inner diameter D2 of the second shell portion 32 satisfy: 0.8D2<D<D1;

[0066] Through a large number of tests, it is known that the outer diameter D of the flange 11 can achieve the best sealing effect.

[0067] In one example of the present invention, a chamfer 302 is provided at the connection point 301 between the first housing portion 31 and the second housing portion 32. The chamfer 302 can facilitate the flow of gear oil from the second housing portion 32 to the first housing portion 31, making the gear oil flow more smoothly.

[0068] In one example of the present invention, the span L1 of the second housing portion 32 in the axial direction is not less than the span L2 of the brake drum 300 in the axial direction;

[0069] In this way, the second housing portion 32 and the brake drum 300 can be optimally matched, the overall matching degree is higher, and the assembly is convenient.

[0070] In one example of the present invention, the shaft body 10 and the flange 20 are connected by a key; this makes it easy to disassemble and assemble the shaft body 10 and the flange 20, and facilitates the connection.

[0071] In one example of the present invention, an external spline 13 is provided along the outer surface of the shaft body 10;

[0072] The flange 20 is provided with a connection hole, and an internal spline matching the external spline 13 is provided along the inner surface of the connection hole;

[0073] By means of the cooperation between the external spline 13 and the internal spline, the connection between the flange 20 and the shaft body 10 can be easily achieved with high reliability.

[0074] Of course, the present invention is not limited thereto, and the shaft body 10 and the wheel hub may also be connected by a common key connection, that is, a key is provided on the shaft body 10 and a keyway matching the key is provided on the flange 20 .

[0075] In one example of the present invention, the shaft body 10 further includes:

[0076] A sealing member 40, wherein the sealing member 40 is sleeved on the shaft body 10 and is disposed close to the flange 20;

[0077] The sealing effect on the gear oil can be further improved by providing the sealing member 40, so as to prevent the gear oil that partially enters the second housing portion 32 from flowing into the direction of the flange 20. For example, the sealing member 40 is an oil seal. Of course, the flange 20 and the brake drum 300 are sealed in themselves, and the sealing member 40 is provided here to further improve the sealing performance in the prior art.

[0078] In one example of the present invention, the shaft body 10 further includes:

[0079] A spiral groove 12, wherein the spiral groove 12 is distributed along the circumferential direction of the shaft body 10 and extends from an end close to the flange 20 to an end away from the flange 20;

[0080] Wherein, the sealing member 40 is sleeved on the outer side of the spiral groove 12;

[0081] The spiral groove 12 and the seal 40 together form a screw pump. The gear oil flowing toward the flange 20 enters the second housing portion 32 and flows back toward the differential 200 under the action of the screw pump, thereby preventing the gear oil from flowing toward the flange 20 and further playing a sealing role.

[0082] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0083] The exemplary implementation of the drive axle half shaft 100 proposed in the present invention is described in detail above with reference to the preferred embodiments. However, those skilled in the art will appreciate that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined in various ways without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A drive axle half shaft, comprising an axle body (10), a flange (20) and an axle housing (30), wherein one end of the axle body (10) is connected to a brake drum (300) via the flange (20), and the other end thereof is connected to a differential (200), a receiving cavity (30A) is formed in the axle housing (30), and the axle body (10) is received in the receiving cavity (30A), characterized in that: The shaft body (10) and the flange (20) are detachably connected; Also includes: A flange (11) extending away from the shaft body (10) along the circumferential direction of the shaft body (10), and the flange (11) is arranged between the flange (20) and the differential (200); The flanges (11) are arranged at intervals along the circumferential direction of the shaft body (10) and extend in a direction away from the shaft body (10); in the case of being arranged at intervals, the flanges (11) are spiral blade structures arranged along the circumferential direction, and when rotating, the spiral blades throw the gear oil in an inclined angle toward the direction of the differential (200): The shaft body (10) also includes: A sealing member (40), the sealing member (40) being sleeved on the shaft body (10) and being arranged close to the flange (20): a spiral groove (12), the spiral groove (12) being distributed along the circumferential direction of the shaft body (10) and extending from an end close to the flange (20) to an end away from the flange (20); The sealing member (40) is sleeved on the outer side of the spiral groove (12); the spiral groove (12) and the sealing member (40) together form a screw pump; the gear oil flowing toward the flange (20) enters the second housing portion (32) and, under the action of the screw pump, flows back toward the differential (200).

2. The drive axle half shaft according to claim 1, characterized in that: The bridge housing (30) comprises a first housing portion (31) and a second housing portion (32) which are coaxially arranged along the axial direction from one end of the differential (200) to one end of the flange (20); wherein the flange (11) is arranged close to the connection (301) between the first housing portion (31) and the second housing portion (32); wherein the inner diameter D1 of the first housing portion (31) is greater than the inner diameter D2 of the second housing portion (32).

3. The drive axle half shaft according to claim 2, characterized in that: The connection point (301) between the first shell part (31) and the second shell part (32) is located on a side of the flange (11) close to the flange plate (20).

4. The drive axle half shaft according to claim 2, characterized in that: The outer diameter D of the flange (11) and the inner diameter D1 of the first shell part (31) and the inner diameter D2 of the second shell part (32) satisfy: 0.8D2<D<D1.

5. The drive axle half shaft according to claim 2, characterized in that: A chamfer (302) is provided at a connection point (301) between the first shell portion (31) and the second shell portion (32).

6. The drive axle half shaft according to claim 1, characterized in that: The span L1 of the second housing in the axial direction is not less than the span L2 of the brake drum (300) in the axial direction.

7. The drive axle half shaft according to claim 1, characterized in that: The shaft body (10) and the flange (20) are connected via a key.

8. The drive axle half shaft according to claim 7, characterized in that: An external spline (13) is provided along the outer surface of the shaft (10); The flange (20) is provided with a connection hole, and an internal spline matching the external spline (13) is provided along the inner surface of the connection hole.

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