Hexagonal key anti-rotation axial positioning structure

Abstract

The invention relates to the technical field of speed reducer transmission structures, and discloses a hexagonal key anti-rotation axial positioning structure. According to the structure, a first gear is assembled on an output shaft, then a first spline blocking piece is arranged in a sleeved mode, the first spline blocking piece rotates in an annular groove of the output shaft, spline teeth of the output shaft are attached to teeth of the first spline blocking piece in a back-to-back mode, then a hexagonal key is inserted into a space formed by two tooth grooves, and the hexagonal key shakes left and right to reach the perfect position. Then the hexagonal keys are slightly taken out, the positions of the tooth grooves are marked, the rest are kept still, the second spline blocking piece is inserted into the output shaft and still rotates in the other annular groove, and then the three hexagonal keys are inserted into the space formed by the two tooth grooves along the marks, so that the first spline blocking piece and the second spline blocking piece cannot rotate due to the fact that the hexagonal keys cannot rotate; and the axial positioning effect is achieved due to back-to-back. Then the second gear and the third spline blocking piece are arranged in a sleeved mode, and finally the clamping spring is clamped in, so that a structure which cannot be rotated or dislocated and cannot be axially shifted is formed, and anti-rotation axial positioning is completed.

Description

Technical Field

[0001] The invention relates to the technical field of reducer transmission structures, in particular to a hexagonal key anti-rotation axial positioning structure. Background Art

[0002] The electric drive axle is the power system and transmission system of new energy vehicles. It has the functions of providing power for the whole vehicle, bearing load, reducing speed, increasing torque and ensuring the differential speed of the left and right wheels. It usually includes key components such as electric motor, reducer (differential, gear, bearing), drive axle, rigid bridge housing and wheel hub bearing. The reducer is the main transmission system. The gears, bearings, differentials, oil seals, etc. inside the reducer determine the transmission scheme. The reducer housing is the internal support and protection.

[0003] Electric drive axles are divided into centralized electric drive axles and distributed electric drive axles. In the new energy field, centralized electric drive axles are the main type, and there are also many transmission solutions. However, the existing output shaft has limited usage scenarios and requires the use of splines and other scenarios. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a hexagonal key anti-rotation axial positioning structure, which has the advantages of only three hexagonal keys and back-to-back anti-rotation positioning of teeth, thereby solving the above-mentioned technical problems.

[0005] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hexagonal key anti-rotation axial positioning structure, comprising an output shaft, gear one, gear two, spline baffle one, spline baffle two, spline baffle three, a retaining spring and a hexagonal key, wherein gear one and gear two are both installed on the outer end of the output shaft and a spacing distance is set between them, the spline baffle one is set at the outer end of the output shaft, the spline baffle two and the spline baffle three are both set at the outer end of the output shaft, the hexagonal key is set at the outer end of the output shaft, the retaining spring is set at the outer end of the output shaft and fits the spline baffle three.

[0006] As a preferred technical solution of the present invention, the spline baffle is rotatably installed at the output shaft ring groove and corresponds to the spline teeth of the output shaft one by one.

[0007] As a preferred technical solution of the present invention, the second spline baffle is rotatably installed at another annular groove of the output shaft and corresponds one-to-one with the spline teeth of the output shaft.

[0008] As a preferred technical solution of the present invention, the number of the hexagonal keys is three, one end of the hexagonal key is inserted into the tooth groove formed one-to-one between the spline baffle plate 1 and the spline teeth of the output shaft, and the other end is inserted into the tooth groove formed one-to-one between the spline baffle plate 2 and the spline teeth of the output shaft.

[0009] As a preferred technical solution of the present invention, the retaining spring is clamped to the outer end of the output shaft.

[0010] As a preferred technical solution of the present invention, the gear one is located between the spline baffle plate one and the output shaft, and the gear two is located between the spline baffle plate two and the spline baffle plate three.

[0011] Compared with the prior art, the present invention provides a hexagonal key anti-rotation axial positioning structure, which has the following beneficial effects: The present invention assembles gear 1 on the output shaft, and then inserts spline baffle 1, which rotates in the output shaft ring groove so that the output shaft spline teeth and the spline baffle 1 teeth fit back to back, and then inserts a hexagonal key into the space formed by the two tooth grooves, and shakes left and right to reach the most perfect position. Then gently take out the hexagonal key, mark the tooth groove position, and keep the rest still, insert spline baffle 2 into the output shaft, and still rotate in another ring groove, and then insert three hexagonal keys into the space formed by the two tooth grooves along the mark. At this point, spline baffle 1 and spline baffle 2 will not rotate due to the hexagonal key, and the axial positioning effect is achieved because they are back to back. Then, gear 2 and spline baffle 3 are inserted, and finally the retaining spring is clamped in, forming a structure that will not be dislocated in rotation or axial displacement, thereby completing the anti-rotation axial positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic cross-sectional view of the present invention.

[0013] Among them: 1. output shaft; 2. gear 1; 3. gear 2; 4. spline baffle 1; 5. spline baffle 2; 6. spline baffle 3; 7. retaining ring; 8. hexagonal key. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0015] See also Figure 1A hexagonal key anti-rotation axial positioning structure comprises an output shaft 1, a gear 2, a gear 2, a spline baffle 1 4, a spline baffle 2 5, a spline baffle 3 6, a retaining spring 7 and a hexagonal key 8. Gear 1 2 and gear 2 3 are both mounted on the outer end of the output shaft 1 and a spacing distance is provided between them. Spline baffle 1 4 is provided at the outer end of the output shaft 1, spline baffle 2 5 and spline baffle 3 6 are both provided at the outer end of the output shaft 1, the hexagonal key 8 is provided at the outer end of the output shaft 1, and the retaining spring 7 is provided at the outer end of the output shaft 1 and fits the spline baffle 3 6.

[0016] The spline baffle 1 4 is rotatably installed on the ring groove of the output shaft 1 and fits and corresponds to the spline teeth of the output shaft 1 one by one.

[0017] The clamping spring 7 is clamped on the outer end of the output shaft 1 .

[0018] The second spline stopper 5 is rotatably mounted on another annular groove of the output shaft 1 and is in close contact with the spline teeth of the output shaft 1 one by one.

[0019] There are three hexagonal keys 8, one end of which is inserted into the tooth groove formed between the spline baffle 1 4 and the spline teeth of the output shaft 1 in a one-to-one correspondence, and the other end is inserted into the tooth groove formed between the spline baffle 2 5 and the spline teeth of the output shaft 1 in a one-to-one correspondence.

[0020] Gear 1 2 is between spline baffle 1 4 and output shaft 1, and gear 2 3 is between spline baffle 2 5 and spline baffle 3 6; The specific installation process of the present invention is as follows: First, assemble the gear 1-2 on the output shaft 1, and then insert the spline baffle 1-4. The spline baffle 1-4 rotates in the ring groove of the output shaft 1, so that the spline teeth of the output shaft 1 and the spline baffle 1-4 teeth fit back to back. Then insert the hexagonal key 8 into the space formed by the two tooth grooves, shake it left and right, and reach the most perfect position. Then gently take out the hexagonal key 8, mark the tooth groove position, and keep the rest still. Insert the spline baffle 2-5 into the output shaft 1, still rotate it in another ring groove, and then insert three hexagonal keys 8 into the space formed by the two tooth grooves along the mark. At this point, the spline baffle 1-4 and the spline baffle 2-5 will not rotate due to the hexagonal key 8, and the axial positioning effect is achieved because they are back to back. Then insert the gear 2-3 and the spline baffle 3-6, and finally insert the retaining spring 7, forming a structure that will neither rotate nor dislocate, and will not axially move, completing the anti-rotation axial positioning, and realizing the anti-rotation positioning through three hexagonal keys and the back-to-back anti-rotation positioning of the teeth.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hexagonal key anti-rotation axial positioning structure, characterized in that: The invention comprises an output shaft (1), a gear 1 (2), a gear 2 (3), a spline baffle plate 1 (4), a spline baffle plate 2 (5), a spline baffle plate 3 (6), a retaining spring (7) and a hexagonal key (8), wherein the gear 1 (2) and the gear 2 (3) are both mounted on the outer end of the output shaft (1) and a spacing distance is provided between them, the spline baffle plate 1 (4) is provided on the outer end of the output shaft (1), the spline baffle plate 2 (5) and the spline baffle plate 3 (6) are both provided on the outer end of the output shaft (1), the hexagonal key (8) is provided on the outer end of the output shaft (1), and the retaining spring (7) is provided on the outer end of the output shaft (1) and fits the spline baffle plate 3 (6).

2. The hexagonal key anti-rotation axial positioning structure according to claim 1, characterized in that: The spline baffle plate 1 (4) is rotatably mounted on the annular groove of the output shaft (1) and is in close contact with the spline teeth of the output shaft (1).

3. The hexagonal key anti-rotation axial positioning structure according to claim 2, characterized in that: The second spline baffle (5) is rotatably mounted on another annular groove of the output shaft (1) and is in close contact with the spline teeth of the output shaft (1).

4. The hexagonal key anti-rotation axial positioning structure according to claim 3, characterized in that: The number of the hexagonal keys (8) is three, one end of the hexagonal key (8) is inserted into a tooth groove formed between the spline baffle plate 1 (4) and the spline teeth of the output shaft (1) in a one-to-one correspondence, and the other end is inserted into a tooth groove formed between the spline baffle plate 2 (5) and the spline teeth of the output shaft (1) in a one-to-one correspondence.

5. The hexagonal key anti-rotation axial positioning structure according to claim 1, characterized in that: The clamping spring (7) is clamped on the outer end of the output shaft (1).

6. The hexagonal key anti-rotation axial positioning structure according to claim 4, characterized in that: The gear one (2) is located between the spline baffle plate one (4) and the output shaft (1), and the gear two (3) is located between the spline baffle plate two (5) and the spline baffle plate three (6).

Images