WO2018121718A1

WO2018121718A1 - Steering gear shaft pressing device

Info

Publication number: WO2018121718A1
Application number: PCT/CN2017/119733
Authority: WO
Inventors: 李友朋; 熊友军
Original assignee: 深圳市优必选科技有限公司
Priority date: 2016-12-30
Filing date: 2017-12-29
Publication date: 2018-07-05
Also published as: CN106584353A; CN106584353B

Abstract

A steering gear shaft pressing device (100) is used to assemble a steering gear shaft (30) and a speed reducer gearbox (20), and comprises: a base (110) comprising a first positioning mechanism (112) disposed thereon and used to position the speed reducer gearbox (20); a guiding shaft (120) vertically arranged on the base (110); a pressing plate (130) arranged opposite to the base (110), and shifted horizontally along the guiding shaft (120); and a shaft pressing module (140) comprising a gear shaft positioning hole (141) arranged thereat and passing therethrough, and a second positioning mechanism (142) arranged at the shaft pressing module (140) and positioning the shaft pressing module (140) on the speed reducer gearbox (20). When in use, the second positioning mechanism (142) is positioned at the speed reducer gearbox (20), and the steering gear shaft (30) is inserted into the gear shaft positioning hole (141), the speed reducer gearbox (20), the shaft pressing module (140), and the steering gear shaft (30) are all assembled together, placed on the base (110), and positioned using the first positioning mechanism (112), the pressing plate (130) is placed on the steering gear shaft (30), and a force is applied to the pressing plate (130) to press the steering gear shaft (30) into a gear shaft hole (21) at the speed reducer gearbox (20). The embodiment is utilized to increase transmission precision, and to ensure relative positions of all the shafts.

Description

Rudder gear shaft pressing device

Technical field

The present invention relates to the field of steering gears, and more particularly to a steering gear shaft pressing device.

Background technique

Steering gears are generally used in applications where the angle of rotation is controlled or where high torque is provided, such as RC mode steering, pan/tilt control, and robotic power. The steering gear reducer is an important part of the steering gear.

The conventional steering gear reducer consists of multi-stage gears. As shown in Figure 1, the steering gear reducer consists of a four-stage reduction system, including motor teeth 1, primary gear 2, secondary gear 3, tertiary gear 4, and output. The tooth 5 and the support bearing 6. The motor teeth 1 are mounted on the motor shaft, and are positioned by the motor boss and the reduction gear body 20 shown in FIG. 2, and the output teeth 5 are positioned by the two support bearings 6 and the reduction gear body 20.

A gear shaft hole 21 corresponding to the steering gear shaft 30 is disposed on the reduction gear body 20, and the first gear 2, the second gear 3 and the third gear 4 of the steering gear reducer are respectively positioned and mounted through the steering gear shaft 30 The gear shaft hole 21 of the reduction case 20 is assembled to realize the assembly of the steering gear shaft 30 and the reduction case 20.

There are two methods for assembling the steering gear shaft and the reduction gear box of the conventional steering gear:

The first type: under the condition that there is a gap between the gear shaft of the steering gear and the gear shaft hole of the reduction gear body, the steering gear shaft is directly placed in the casing;

Secondly, under the condition that there is no gap between the gear shaft of the steering gear and the gear shaft hole of the reduction gear box, the single shaft of the steering gear shaft is pressed into the casing by pressure.

However, for the first assembly method, since there is a gap between the gear shaft of the steering gear and the gear shaft hole of the reduction gear body, the position of the gear shaft of the steering gear is not fixed, which affects the transmission precision of the gear set; meanwhile, due to the steering gear The gear shaft is not fixed, causing the steering gear shaft to easily sway or even fall. For the second assembly method, the position of the steering gear shaft is fixed, but the position of the single gear shaft can only be guaranteed when the shaft is pressed. The distance and position tolerance between the shafts cannot be guaranteed. In particular, the steering gear shaft cannot be guaranteed. The relative positional relationship between the output teeth and the motor teeth.

Summary of the invention

Based on this, it is necessary to provide a steering gear shaft pressing device capable of improving the transmission accuracy of the steering gear shaft and the reduction gear body after assembly and ensuring the relative position between the shafts.

A steering gear shaft pressing device for assembling a steering gear shaft and a reduction gear body, wherein the steering gear shaft pressing device comprises:

a base, the base is provided with a first positioning mechanism for positioning the reduction box;

a guiding shaft is erected on the base;

a pressure plate disposed opposite to the base, the pressure plate being translatable along the guide shaft;

And the finale template,

The shaft shaft template is provided with a gear shaft positioning hole penetrating the pressure shaft template, and the pressure shaft template is provided with a second positioning mechanism for positioning the pressure shaft template to the reduction gear box.

When the above-mentioned steering gear shaft pressing device is used, the second positioning mechanism of the pressing shaft template is positioned on the reduction gear body, and the steering gear shaft is placed in the gear shaft positioning hole, and the combined reduction gear body, the pressing shaft template and the steering gear The gear shaft is placed on the base together, and the positioning is achieved by the first positioning mechanism, and the pressure plate is placed on the steering gear shaft. After the external force acts on the pressure plate, the pressure plate can be translated along the guiding shaft, and the steering gear shaft can be pressed into the deceleration. The corresponding gear shaft hole in the box body completes the assembly of the steering gear shaft and the reduction gear box, which improves the transmission precision of the steering gear shaft and the reduction gear body after assembly, and also ensures the relative position between the shafts. .

In one of the embodiments, the first positioning mechanism includes a groove disposed on the base and having an outer contour for positioning the reduction case.

In one embodiment, the first positioning mechanism includes a first positioning protrusion and a second positioning protrusion for respectively positioning a motor hole of the reduction box and a bearing hole of the reduction box.

In one embodiment, the surfaces of the first positioning protrusion and the second positioning protrusion opposite to the pressure plate are inwardly recessed to form a blind hole.

In one embodiment, the steering gear shaft pressing device further includes an elastic member sleeved on the outside of the guiding shaft, and two ends of the elastic member are respectively abutted against the base and the pressing plate.

In one of the embodiments, the elastic element is a spring.

In one of the embodiments, the second positioning mechanism includes a third positioning step and a fourth positioning step for respectively inserting a motor hole of the reduction case and a bearing hole of the reduction case.

In one embodiment, the surface of the pressing shaft template opposite to the reduction box body is provided with a fifth positioning step that can abut against the reduction box body, and the gear shaft positioning hole penetrates the fifth positioning step .

In one of the embodiments, the finale template has a chamfer.

In one embodiment, the number of the guide shafts is four, and the four guide shafts are evenly distributed around the first positioning mechanism.

DRAWINGS

Figure 1 is a schematic view of a steering gear reduction box;

2 is a schematic view of a reduction box body in a steering gear;

3 is an exploded perspective view showing a gear shaft pressing device of a steering gear, a steering gear shaft, and a reduction gear box according to an embodiment of the present invention;

4 is a schematic view of a finale template according to an embodiment of the present invention.

detailed description

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims. Numerous specific details are set forth in the description below in order to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention, and thus the invention is not limited by the specific embodiments disclosed below.

The invention provides a steering gear shaft pressing device for assembling a steering gear shaft and a reduction gear body, so as to improve the transmission precision of the steering gear shaft and the reduction gear body after assembly and ensure the relative position between the shafts.

Referring to FIG. 3 , the steering gear shaft pressing device 100 of the embodiment includes a base 110 , a guiding shaft 120 , a pressing plate 130 , a pressing shaft template 140 , and an elastic member 150 sleeved on the outside of the guiding shaft 120 . The reduction case 20 and the steering gear shaft 30 are respectively located on both sides of the finale template 140.

A first positioning mechanism 112 for positioning the reduction case 20 is disposed on the base 110. Referring to FIG. 2 together, the first positioning mechanism 112 includes a groove 1121 disposed on the base 110 and having an outer contour for positioning the reduction case 20, and a motor hole 22 and a reduction box for respectively fixing the reduction case 20. The first positioning protrusion 1122 and the second positioning protrusion 1123 of the bearing hole 23 of the body 20. The recess 1121, the first positioning protrusion 1122 and the second positioning protrusion 1123 cooperate to position the reduction box 20 on the base 110, thereby ensuring the position of the reduction box 20 is accurate, and at the same time ensuring the steering gear shaft and Stability during assembly of the reduction box.

In this embodiment, the surfaces of the first positioning protrusion 1122 and the second positioning protrusion 1123 opposite to the pressure plate 130 are all recessed inward to form a blind hole, as shown in FIG. The purpose of such an arrangement is to save material of the first positioning protrusion 1122 and the second positioning protrusion 1123, which is advantageous in cost saving.

In the present embodiment, the cross-sectional shapes of the blind holes of the first positioning protrusion 1122 and the second positioning protrusion 1123 are all circular. Of course, the cross-sectional shape of the blind hole is not limited thereto, and may be other shapes such as a rectangle. In addition, blind holes may not be provided.

As shown in FIG. 3, the guide shaft 120 is erected on the base 110 to support and guide the presser plate template 140. In the present embodiment, the number of the guide shafts 120 is four, and the four guide shafts 120 are evenly distributed around the first positioning mechanism 112. The advantage of this arrangement is that during the assembly process, the reduction gear body 20, the steering gear shaft 30 and the pressure shaft template 140 are all located within the area enclosed by the four guide shafts 120, and the four guide shafts 120 can provide better support and The role of the finale template 140 is guided.

The pressure plate 130 is disposed opposite to the base 110, and the pressure plate 130 is translatable along the guide shaft 120. Specifically, the pressure plate 130 is provided with four through holes through which the guide shaft 120 can pass. After the guide shaft 120 passes through the through hole, the pressure plate 130 is translated in the axial direction of the guide shaft 120, so that the steering gear shaft can be 30 is pressed into the corresponding gear shaft hole 21 of the reduction gear box 20. The size of the pressure plate 130 can be set according to actual needs.

The finale template 140 is used to position the steering gear shaft 30. Referring to FIG. 4 , the pressure shaft template 140 is provided with a gear shaft positioning hole 141 penetrating the pressure shaft template 140 , and the pressure shaft template 140 is provided with a second positioning mechanism 142 for positioning the pressure shaft template 140 on the reduction gear body 20 .

The gear shaft positioning hole 141 is disposed corresponding to the gear shaft hole 21 of the reduction gear body 20, that is, the number and distribution of the gear shaft positioning hole 141 and the gear shaft hole 21 on the reduction gear body 20 are consistent. Further, the inner diameter of the gear shaft positioning hole 141 is the same as the outer diameter of the steering gear shaft 30. Therefore, there is no gap between the gear shaft positioning hole 141 and the steering gear shaft 30 during assembly, and the steering gear shaft 30 can be avoided. The gear shaft positioning hole 141 is shaken to affect the assembly accuracy.

In the present embodiment, since the end faces of the three gear shaft holes 21 corresponding to the gear shaft positioning holes 141 on the reduction gear body 20 are not located in the same plane, as shown in FIGS. 2 and 3, the left side of the reduction gear body 20 is shown. The end faces of the two gear shaft holes 21 are higher than the end faces of the rightmost gear shaft holes 21. Therefore, a fifth positioning step 1412 that can abut against the reduction housing 20 is disposed on a surface of the pressing shaft template 140 opposite to the reduction housing 20, and as shown in FIG. 4, the rightmost gear shaft positioning hole 141 runs through the fifth. The step 1412 is positioned. After the setting, after the pressing shaft template 140 is fixed to the reduction box 20, the pressing shaft template 140 can be in contact with the position of the three gear shaft holes 21 of the reduction gear box 20 at the position where the three gear shaft positioning holes 141 are located. Therefore, the stability of the finale template 140 and the reduction box 20 after positioning is improved to avoid errors.

Of course, the form of the gear shaft positioning hole 141 is not limited thereto, and it may be changed in accordance with the form of the gear shaft hole 21 provided corresponding thereto, as long as the ends of the both can be attached.

The second positioning mechanism 142 can be embedded in the reduction gear body 20 for positioning the pressure shaft template 140 on the reduction gear body 20. Specifically, the second positioning mechanism 142 in the present embodiment includes a third positioning step 1421 and a fourth positioning step 1422 for respectively inserting the motor hole 21 of the reduction case 20 and the bearing hole 22 of the reduction case 20. In the present embodiment, the size of the third positioning step 1421 is the same as the size of the motor hole 21 of the reduction case 20, so that there is no gap between the two, and the shaking can be avoided to affect the assembly accuracy. Similarly, the size of the fourth positioning step 1422 is the same as the size of the bearing hole 22 of the reduction case 20, and there is no gap therebetween, which can avoid the shaking and affect the assembly accuracy.

In addition, the finale template 140 of the present embodiment has a chamfered shape, and the volume of the finale template 140 can be reduced after the chamfering is provided, thereby saving a part of the material cost. Of course, the chamfering template 140 may not be chamfered. In addition, the finale template 140 is obtained by precision machining to reduce machining errors and thereby improve accuracy.

As shown in FIG. 3, in the present embodiment, an elastic member 150 is provided outside the guide shaft 120. After assembly, the two ends of the elastic member 150 abut against the base 110 and the pressure plate 130 respectively. The elastic member 150 of the present embodiment is a spring. Of course, the elastic member 150 can also be other components that can function elastically. The elastic member 150 can function to support the pressure plate 130 during the process of pressing the shaft, so that the pressure plate 130 slowly presses the steering gear shaft 30 to prevent the pressure from being too fast and damage the steering gear shaft 30.

In addition, it should be noted that the steering gear shaft pressing device of the present invention is not limited thereto, and the size, position, and the like of the gear shaft positioning hole 141 and the second positioning mechanism 142 on the pressing shaft template 140 may be based on the number of the steering gear shaft 30. , size and distribution settings.

When the steering gear shaft pressing device of the invention is used, the second positioning mechanism of the pressing shaft template is positioned on the reduction gear body, and the steering gear shaft is placed in the gear shaft positioning hole, and the combined reduction gear body, the pressing shaft template and The steering gear shaft is placed on the base together, and the positioning is achieved by the first positioning mechanism. The pressure plate is placed on the steering gear shaft, and then an external force acts on the pressure plate to translate the pressure plate along the guide shaft, and the steering gear shaft can be pressed. It is inserted into the corresponding gear shaft hole on the reduction gear box, thus completing the assembly of the steering gear shaft and the reduction gear body, which not only improves the transmission precision of the steering gear shaft and the reduction gear body after assembly, but also ensures the between the shafts. relative position.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A steering gear shaft pressing device for assembling a steering gear shaft and a reduction gear body, wherein the steering gear shaft pressing device comprises:

a base, the base is provided with a first positioning mechanism for positioning the reduction box;

a guiding shaft is erected on the base;

a pressure plate disposed opposite to the base, the pressure plate being translatable along the guide shaft;

And the finale template,

The shaft shaft template is provided with a gear shaft positioning hole penetrating the pressure shaft template, and the pressure shaft template is provided with a second positioning mechanism for positioning the pressure shaft template to the reduction gear box.
A steering gear shaft pressing device according to claim 1, wherein said first positioning mechanism includes a groove provided on said base and having an outer contour for positioning said reduction casing.
A steering gear shaft pressing device according to claim 1, wherein said first positioning mechanism includes a first positioning for respectively positioning a motor hole of said reduction gear body and a bearing hole of said reduction gear body a projection and a second positioning projection.
The steering gear shaft pressing device of the steering gear according to claim 3, wherein the surfaces of the first positioning protrusion and the second positioning protrusion opposite to the pressure plate are inwardly recessed to form a blind hole.
The steering gear shaft pressing device of claim 1 , wherein the steering gear shaft pressing device further comprises an elastic member sleeved outside the guiding shaft, and the two ends of the elastic member are respectively The base and the pressure plate abut.
A steering gear shaft pressing device according to claim 5, wherein said elastic member is a spring.
A steering gear shaft pressing device according to claim 1, wherein said second positioning mechanism includes a third hole for inserting a motor hole of said reduction gear body and a bearing hole of said reduction gear body, respectively Positioning step and fourth positioning step.
The steering gear shaft pressing device of the steering gear according to claim 1, wherein a surface of the pressing shaft template opposite to the reduction gear body is provided with a fifth positioning step that can abut against the reduction gear body, A gear shaft positioning hole extends through the fifth positioning step.
A steering gear shaft pressing device according to claim 1, wherein said pressure shaft template has a chamfer.
The steering gear shaft pressing device according to claim 1, wherein the number of the guide shafts is four, and the four guide shafts are evenly distributed around the first positioning mechanism.