阅读说明：本技术 一种转向台用减速机 (Speed reducer for steering table ) 是由 陈可来 吴宾辉 郑上剑 徐玲俐 林希国 郑上杰 于 2019-09-30 设计创作，主要内容包括：本发明涉及减速机领域,公开一种转向台用减速机,包括箱体(1),箱体(1)包括两侧的第一安装盖板(11)、第二安装盖板(12),配合部箱体(1)内设有蜗轮(2)和齿轮(3),蜗轮(2)与齿轮(3)的旋转面互相垂直并啮合,箱体(1)的底部设有空腔(4)；还包括输出轴(5),齿轮(3)的中央设有水平贯穿的平键(31),平键(31)与输出轴(5)固定连接；不采用蜗轮和蜗杆连接,而是采用蜗轮直接与齿轮连接,二者直径差距更小,啮合更紧密,传动损失减小,可以减小反转时的间隔,从而避免了运作时产生异响。(The invention relates to the field of speed reducers and discloses a speed reducer for a steering table, which comprises a box body (1), wherein the box body (1) comprises a first mounting cover plate (11) and a second mounting cover plate (12) which are arranged on two sides, a worm wheel (2) and a gear (3) are arranged in the box body (1) of a matching part, the rotating surfaces of the worm wheel (2) and the gear (3) are mutually vertical and meshed, and a cavity (4) is arranged at the bottom of the box body (1); the gear is characterized by further comprising an output shaft (5), a flat key (31) which horizontally penetrates through the gear (3) is arranged in the center of the gear, and the flat key (31) is fixedly connected with the output shaft (5); the worm wheel is not connected with the worm, but directly connected with the gear, the diameter difference between the worm wheel and the gear is smaller, the meshing is tighter, the transmission loss is reduced, the interval during the reverse rotation can be reduced, and therefore abnormal sound is avoided during operation.)

1. The utility model provides a speed reducer for steering table, includes box (1), its characterized in that: the box body (1) comprises a first mounting cover plate (11) and a second mounting cover plate (12) which are arranged on two sides, a worm wheel (2) and a gear (3) are arranged in the box body (1) of the matching part, the rotating surfaces of the worm wheel (2) and the gear (3) are mutually vertical and meshed, and a cavity (4) is arranged at the bottom of the box body (1); the gear is characterized by further comprising an output shaft (5), a flat key (31) which horizontally penetrates through the gear (3) is arranged in the center of the gear, and the flat key (31) is fixedly connected with the output shaft (5); the inner side of the end part of the first mounting cover plate (11) is provided with a first inclined end face (111), the inner side of the first mounting cover plate (11) is provided with a first bearing (112), the outer side of the first bearing (112) is provided with a first mounting step (113), the outer edge of the first mounting step (113) comprises a first face (1131), a second face (1132) and a third face (1133), the inner side and the outer side of the second face (1132) are respectively connected with the first face (1131) and the third face (1133), the included angle between the first face (1131) and the second face (1132) is alpha, the inner side of the end part of the second mounting cover plate (12) is provided with a second inclined end face (121), the inner side of the second mounting cover plate (12) is provided with a second bearing (122), the outer side of the second bearing (122) is provided with a second mounting step (123), the outer edge of the second mounting step (123) comprises a fourth face (1231), a fifth face (1232), the inner side and the outer side of the fifth surface (1232) are respectively connected with the sixth surface (1233) and the fourth surface (1231), and the included angle between the fourth surface (1231) and the fifth surface (1232) is beta.

2. A speed reducer for a steering table according to claim 1, characterized in that: alpha is more than 15 degrees and less than 90 degrees, the second face (1132) is perpendicular to the third face (1133), the first end face (111) is parallel to the third face (1133), and a first elastic sealing element (114) is arranged between the first end face (111) and the third face (1133).

3. A speed reducer for a steering table according to claim 1, characterized in that: beta is more than 15 degrees and less than 90 degrees, the fifth surface (1232) is vertical to the sixth surface (1233), the second end surface (121) is parallel to the sixth surface (1233), and a second elastic sealing element (124) is arranged between the second end surface (121) and the sixth surface (1233).

4. A speed reducer for a steering table according to claim 1, characterized in that: the diameter of the worm wheel (2) is 0.8-1.2 times of the diameter of the gear (4).

5. A speed reducer for a steering table according to claim 1, characterized in that: the worm wheel (2) is arranged above the gear (3), and the worm wheel (2) is fixed on the upper part inside the box body (1).

6. A speed reducer for a steering table according to claim 1, characterized in that: the worm wheel (2) is arranged below the gear (3), and the worm wheel (2) is fixed above the cavity (4).

7. A speed reducer for a steering table according to claim 1, characterized in that: the cavity wall of the cavity (4) is cylindrical or truncated cone-shaped.

8. A speed reducer for a steering table according to claim 1, characterized in that: the top of the box body (1) is provided with an air vent (6).

Technical Field

The invention relates to the field of speed reducers, in particular to a speed reducer for a steering table.

Background

The speed reducer is used for matching rotating speed and transmitting torque between a prime motor and a working machine or an actuating mechanism, and is relatively precise mechanical equipment and used for reducing the rotating speed and improving the torque.

The motor speed reducer of the automobile electric power steering gear produced in China at present mostly adopts a worm gear mechanism; due to manufacturing errors and installation errors, a gear backlash is generated when the worm and the gear are meshed; when the rotation direction of the worm changes, a reverse gap is generated due to the existence of a tooth side gap, so that the reverse rotation of the worm cannot be immediately transmitted to the worm wheel, the mechanical transmission error is caused, and meanwhile, the worm wheel and the worm generate impact to bring abnormal sound; in order to improve the accuracy of the mechanical transmission and eliminate abnormal noise, it is necessary to eliminate such a gap.

Disclosure of Invention

The invention provides a speed reducer for a steering table, aiming at the defect of high transmission noise in the prior art.

In order to solve the technical problem, the invention is solved by the following technical scheme:

a speed reducer for a steering table comprises a box body, wherein the box body comprises a first mounting cover plate and a second mounting cover plate which are arranged on two sides, a worm wheel and a gear are arranged in a box body of a matching part, the worm wheel and the rotating surface of the gear are mutually vertical and meshed, and a cavity is arranged at the bottom of the box body; the gear is characterized by further comprising an output shaft, a flat key which horizontally penetrates through the center of the gear is arranged, the flat key is fixedly connected with the output shaft, an inclined first end face is arranged on the inner side of the end portion of the first mounting cover plate, a first bearing is arranged on the inner side of the first mounting cover plate, a first mounting step is arranged on the outer side of the first bearing, the outer edge of the first mounting step comprises a first face, a second face and a third face, the inner side and the outer side of the second face are respectively connected with the first face and the third face, the included angle between the first face and the second face is alpha, an inclined second end face is arranged on the inner side of the end portion of the second mounting cover plate, a second bearing is arranged on the inner side of the second mounting cover plate, a second mounting step is arranged, the inner side and the outer side of the fifth surface are respectively connected with the sixth surface and the fourth surface, and the included angle between the fourth surface and the fifth surface is beta. The first elastic sealing element and the second elastic sealing element are obliquely arranged, so that the adjustment is convenient, the axial pressing force on the worm wheel can be ensured, the gear does not have axial movement, the tooth side gap can be automatically adjusted in the using process of the worm wheel gear, the gear shaft can be inclined relative to the inner ring of the supporting bearing, and the abnormal sound phenomenon caused by metal impact of the gear shaft and the inner ring of the bearing in a small gap between the gear shaft and the inner ring of the bearing can be reliably prevented. The worm wheel is not connected with the worm, but directly connected with the gear, the diameter difference between the worm wheel and the gear is smaller, the meshing is tighter, the transmission loss is reduced, the interval during the reverse rotation can be reduced, and therefore abnormal sound is avoided during operation.

Preferably, the angle alpha is more than 15 degrees and less than 90 degrees, the second surface is perpendicular to the third surface, the first end surface is parallel to the third surface, and a first elastic sealing element is arranged between the first end surface and the third surface.

Preferably, the angle is 15 degrees < beta < 90 degrees, the fifth surface is perpendicular to the sixth surface, the second end surface is parallel to the sixth surface, and a second elastic sealing element is arranged between the second end surface and the sixth surface.

Preferably, the diameter of the worm wheel is 0.8 to 1.2 times the diameter of the gear. The diameter of the worm wheel is close to that of the gear, so that the installation and the meshing are facilitated, and the volume of the box body is reduced. Under the condition of small overall dimension, a large transmission ratio can be obtained, the work is stable, and the noise is small.

Preferably, the worm wheel is provided above the gear, and the worm wheel is fixed above the inside of the case.

Preferably, the worm wheel is disposed below the gear and the worm wheel is fixed above the cavity. Two installation modes are used, the installation can be carried out at the upper part or the lower part according to requirements, the installation is convenient,

preferably, the cavity wall of the cavity is cylindrical or truncated cone-shaped. The cavity is arranged to play a certain cushioning role, and the cavity can also be used as an oil storage tank.

Preferably, the top of the box body is provided with a vent.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: the worm wheel is not connected with the worm, but directly connected with the gear, the diameter difference between the worm wheel and the gear is smaller, the meshing is tighter, the transmission loss is reduced, the interval during the reverse rotation can be reduced, and therefore abnormal sound is avoided during operation.

The output shaft and the gear rotate synchronously, so that transmission loss caused by relative rotation in the vertical direction is avoided, and the transmission efficiency is improved to further avoid abnormal sound generated during operation.

Through simple structure, realized turning to the function of speed reduction, can make the machine than the traditional manufacturing cost who turns to the speed reducer significantly reduce.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic structural view of example 2.

Fig. 3 is a partially enlarged view of a.

Fig. 4 is a partial enlarged view of B.

The names of the parts indicated by the numerical references in the above figures are as follows: wherein, 1-box, 2-worm wheel, 3-gear, 4 cavitys, 5-output shaft, 6-blow vent, 11-first installation apron, 12-second installation apron, 31-parallel key, 111-first terminal surface, 112-first bearing, 113-first installation step, 114-first elastic sealing element, 121-second terminal surface, 122-second bearing, 123-second installation step, 124-second elastic sealing element, 1131-first face, 1132-second face, 1133-third face, 1231-fourth face, 1232-fifth face, 1233-sixth face.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A speed reducer for a steering table comprises a box body 1, wherein the box body 1 comprises a first mounting cover plate 11 and a second mounting cover plate 12 which are arranged on two sides, a worm wheel 2 and a gear 3 are arranged in a matching part box body 1, the worm wheel 2 is perpendicular to and meshed with a rotating surface of the gear 3, and a cavity 4 is arranged at the bottom of the box body 1; the transmission mechanism further comprises an output shaft 5, a flat key 31 which horizontally penetrates through is arranged in the center of the gear 3, the flat key 31 is fixedly connected with the output shaft 5, an inclined first end surface 111 is arranged on the inner side of the end portion of the first mounting cover plate 11, a first bearing 112 is arranged on the inner side of the first mounting cover plate 11, a first mounting step 113 is arranged on the outer side of the first bearing 112, the outer edge of the first mounting step 113 comprises a first surface 1131, a second surface 1132 and a third surface 1133, the inner side and the outer side of the second surface 1132 are respectively connected with the first surface 1131 and the third surface 1133, the included angle between the first surface 1131 and the second surface 1132 is alpha, an inclined second end surface 121 is arranged on the inner side of the end portion of the second mounting cover plate 12, a second bearing 122 is arranged on the inner side of the second mounting cover plate 12, a second mounting step 123 is arranged on the outer side of the second bearing 122, the outer edge of the second mounting step 123 comprises a fourth surface 1231, a fifth surface 1232 and a sixth surface 1233, the angle between the fourth surface 1231 and the fifth surface 1232 is β.

α is 45 °, the second face 1132 is perpendicular to the third face 1133, the first end face 111 is parallel to the third face 1133, and a first elastic seal 114 is disposed between the first end face 111 and the third face 1133.

β is 45 °, the fifth face 1232 is perpendicular to the sixth face 1233, the second face 121 is parallel to the sixth face 1233, and a second elastic sealing member 124 is disposed between the second face 121 and the sixth face 1233.

The diameter of the worm wheel 2 is 1 times the diameter of the gear wheel 4.

The worm wheel 2 is arranged above the gear 3, and the worm wheel 2 is fixed above the inner part of the box body 1.

The cavity wall of the cavity 4 is in a shape of a circular truncated cone.

The top of the box body 1 is provided with a vent 6.

Example 2

A speed reducer for a steering table comprises a box body 1, wherein the box body 1 comprises a first mounting cover plate 11 and a second mounting cover plate 12 which are arranged on two sides, a worm wheel 2 and a gear 3 are arranged in a matching part box body 1, the worm wheel 2 is vertical to and meshed with a rotating surface of the gear 3, and a cavity 4 is arranged at the bottom of the box body 1; the transmission mechanism further comprises an output shaft 5, a flat key 31 which horizontally penetrates through is arranged in the center of the gear 3, the flat key 31 is fixedly connected with the output shaft 5, an inclined first end surface 111 is arranged on the inner side of the end portion of the first mounting cover plate 11, a first bearing 112 is arranged on the inner side of the first mounting cover plate 11, a first mounting step 113 is arranged on the outer side of the first bearing 112, the outer edge of the first mounting step 113 comprises a first surface 1131, a second surface 1132 and a third surface 1133, the inner side and the outer side of the second surface 1132 are respectively connected with the first surface 1131 and the third surface 1133, the included angle between the first surface 1131 and the second surface 1132 is alpha, an inclined second end surface 121 is arranged on the inner side of the end portion of the second mounting cover plate 12, a second bearing 122 is arranged on the inner side of the second mounting cover plate 12, a second mounting step 123 is arranged on the outer side of the second bearing 122, the outer edge of the second mounting step 123 comprises a fourth surface 1231, a fifth surface 1232 and a sixth surface 1233, the angle between the fourth surface 1231 and the fifth surface 1232 is β.

α is 75 °, the second face 1132 is perpendicular to the third face 1133, the first end face 111 is parallel to the third face 1133, and a first elastic seal 114 is disposed between the first end face 111 and the third face 1133.

Beta is 75 deg., the fifth face 1232 is perpendicular to the sixth face 1233, the second face 121 is parallel to the sixth face 1233, and a second elastic sealing member 124 is disposed between the second face 121 and the sixth face 1233.

The diameter of the worm wheel 2 is 0.8 times the diameter of the gear wheel 4.

The worm wheel 2 is arranged below the gear 3, and the worm wheel 2 is fixed above the cavity 4.

The cavity wall of the cavity 4 is cylindrical in shape.

Example 3

A speed reducer for a steering table comprises a box body 1, wherein the box body 1 comprises a first mounting cover plate 11 and a second mounting cover plate 12 which are arranged on two sides, a worm wheel 2 and a gear 3 are arranged in the box body 1 at a matching part, the worm wheel 2 and the rotating surface of the gear 3 are mutually vertical and meshed, and a cavity 4 is arranged at the bottom of the box body 1; the transmission mechanism further comprises an output shaft 5, a flat key 31 which horizontally penetrates through is arranged in the center of the gear 3, the flat key 31 is fixedly connected with the output shaft 5, an inclined first end surface 111 is arranged on the inner side of the end portion of the first mounting cover plate 11, a first bearing 112 is arranged on the inner side of the first mounting cover plate 11, a first mounting step 113 is arranged on the outer side of the first bearing 112, the outer edge of the first mounting step 113 comprises a first surface 1131, a second surface 1132 and a third surface 1133, the inner side and the outer side of the second surface 1132 are respectively connected with the first surface 1131 and the third surface 1133, the included angle between the first surface 1131 and the second surface 1132 is alpha, an inclined second end surface 121 is arranged on the inner side of the end portion of the second mounting cover plate 12, a second bearing 122 is arranged on the inner side of the second mounting cover plate 12, a second mounting step 123 is arranged on the outer side of the second bearing 122, the outer edge of the second mounting step 123 comprises a fourth surface 1231, a fifth surface 1232 and a sixth surface 1233, the angle between the fourth surface 1231 and the fifth surface 1232 is β.

α is 25 °, the second face 1132 is perpendicular to the third face 1133, the first end face 111 is parallel to the third face 1133, and a first elastic seal 114 is disposed between the first end face 111 and the third face 1133.

Beta is 25 deg., the fifth face 1232 is perpendicular to the sixth face 1233, the second face 121 is parallel to the sixth face 1233, and a second elastic sealing member 124 is disposed between the second face 121 and the sixth face 1233.

The diameter of the worm wheel 2 is 1.2 times the diameter of the gear wheel 4.

The worm wheel 2 is arranged above the gear 3, and the worm wheel 2 is fixed above the inner part of the box body 1.

The worm wheel 2 is arranged below the gear 3, and the worm wheel 2 is fixed above the cavity 4.

The cavity wall of the cavity 4 is cylindrical or truncated cone-shaped.

The top of the box body 1 is provided with a vent 6.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.