Split type inner gear ring assembly

Abstract

The utility model relates to a split type inner gear ring assembly which comprises an end cover, a positioning pin, a bearing and an inner gear ring, an end cover pin hole is in clearance fit with the positioning pin, an inner gear ring pin hole is in clearance fit with the positioning pin, the bearing is in interference fit with the end cover, and the inner gear ring is in interference fit with the end cover. The two positioning pins are pressed into the inner gear ring pin hole and the end cover pin hole, finally, the end cover and the inner gear ring are pressed and welded through a laser welding machine, the overall structure is stable, assembly is conducted through single assembly equipment, one person can complete several procedures, and the product precision requirement is met on the basis that the machining cost is effectively controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to a split type inner gear ring assembly, and is suitable for micro - small planetary mechanism gear box. BACKGROUND

[0002] With the improvement of living standards, the floor cleaning robot because its simple operation function and convenience, now has slowly popularized, became the important member in small household appliances, is popular. A floor cleaning robot usually needs to wear 2 sets of micro - small planetary mechanism gear box, due to space limitation, resulting in the whole planetary mechanism is very small, therefore need to match the size smaller precision type inner gear ring assembly, adopt integral type inner gear ring needs to process inner spline, and the processing time is long, and the cost is high, and can not guarantee effective precision. UTILITY MODEL CONTENTS

[0003] The utility model discloses a split type inner gear ring assembly which is reasonable in design and stable in structure.

[0004] The utility model discloses the technical scheme that the above -mentioned problem is solved is: a split type inner gear ring assembly, including end cover, positioning pin, bearing and inner gear ring, the bearing press -pack fixed in end cover, the end cover is press -pack on the inner gear ring through positioning pin;

[0005] The upper surface of the end cover is provided with a convex ring coaxial with the end cover, a plurality of convex blocks are distributed around the convex ring, positioning grooves are formed between the convex blocks, and an end cover pin hole is arranged on the end cover.

[0006] The top of the inner gear ring is provided with a guide ring, the guide ring is provided with an inner gear ring pin hole, and the bottom of the inner gear ring is provided with a plurality of grooves.

[0007] The end cover pin hole and the positioning pin are in clearance fit, and the inner gear ring pin hole and the positioning pin are in clearance fit.

[0008] The bearing is in interference fit with the end cover, and the inner gear ring is in interference fit with the end cover.

[0009] Preferably, the end cover pin hole and the inner gear ring pin hole adopt an inner hole chamfer structure.

[0010] Preferably, the positioning pin is a cylindrical pin.

[0011] The utility model adopts a split type structure, the bearing is pressed into the end cover, then the two positioning pins are pressed into the corresponding inner gear ring pin hole and end cover pin hole respectively, finally the end cover and the inner gear ring are press -packaged, and then welded by a laser welding machine, the overall structure is stable, a single assembly equipment is used for assembly, one person can complete several processes, and the product precision requirement is met on the basis of effectively controlling the processing cost.

[0012] The end cover pin hole and the inner tooth ring pin hole adopt an inner hole chamfer structure, and gap cooperation between the end cover pin hole, the inner tooth ring pin hole and the positioning pin increases the wall thickness of the press-in position, so that the positioning pin will not damage the outer wall of the inner tooth ring and the end cover press-in position when being pressed in, and the pulling force requirement between the pressed-in end cover and the inner tooth ring is ensured.

[0013] The end cover and the inner tooth ring adopt interference fit, the recess of the inner tooth ring and the positioning recess on the end cover are pressed and assembled on the same straight line through the two positioning pins, the end cover is ensured not to fall off, and the position degree consistency of the two recesses of the assembly is also ensured.

[0014] Compared with the prior art, the utility model has the following advantages and effects: 1, adopt split type structure, the overall structure is stable, on the basis of effectively controlling the processing cost to meet the product precision requirement;2, end cover pin hole, inner tooth ring pin hole adopt inner hole chamfer structure, gap cooperation with positioning pin, ensure the pulling force requirement between the pressed-in end cover and the inner tooth ring, ensure that the end cover does not fall off, realize the assembly assembly position degree consistency;3, the inner tooth ring adopts the pull inner spline process, and the processing process is stable, and the product precision is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the assembly structure schematic view of the utility model embodiment.

[0016] Fig. 2 It is the inner tooth ring structure schematic view of the utility model embodiment.

[0017] In the drawing: end cover 1, end cover pin hole 11, convex ring 12, convex block 13, positioning recess 14, positioning pin 2, bearing 3, inner tooth ring 4, guide ring 41, inner tooth ring pin hole 42, recess 43. PREFERRED EMBODIMENT

[0018] The utility model will be further explained in detail in combination with the drawings and through the embodiment, and the following embodiment is the explanation of the utility model, and the utility model is not limited to the following embodiment.

[0019] Referring to Figs. 1-2The split type inner gear ring assembly in the embodiment comprises an end cover 1, two positioning pins 2, a bearing 3 and an inner gear ring 4, the bearing 3 is press-fitted and fixed in the end cover 1, the end cover 1 is press-fitted on the inner gear ring 4 through the positioning pins 2, and the positioning pins 2 are cylindrical pins; a convex ring 12 coaxial with the end cover 1 is arranged on the upper surface of the end cover 1, two sector-shaped protrusions 13 are arranged around the convex ring 12, two positioning grooves 14 are formed between the two sector-shaped protrusions 13, and an end cover pin hole 11 is arranged on the end cover 1; a guide ring 41 is arranged on the top of the inner gear ring 4, an inner gear ring pin hole 42 is arranged on the guide ring 41, and two grooves 43 are arranged on the bottom of the inner gear ring 4; the end cover pin hole 11 is in clearance fit with the positioning pin 2, the inner gear ring pin hole 42 is in clearance fit with the positioning pin 2, the bearing 3 is in interference fit with the end cover 1, and the inner gear ring 4 is in interference fit with the end cover 1.

[0020] The end cover pin hole 11 and the inner gear ring pin hole 42 in the embodiment adopt an inner hole chamfer structure.

[0021] The embodiment adopts a split type structure, the bearing 3 is press-fitted into the end cover 1, then the two positioning pins 2 are press-fitted into the corresponding inner gear ring pin hole 42 and end cover pin hole 11 respectively, finally the end cover 1 and the inner gear ring 4 are press-fitted, and then are welded by a laser welding machine, so that the overall structure is stable, the single assembly equipment is used for assembly, one person can complete several processes, the product precision requirement is met on the basis of effectively controlling the processing cost.

[0022] The inner gear ring 4 in the embodiment adopts a pull inner spline process, so that the problem that the whole type gear shaping cutter is prone to tooth collapse is avoided, the processing rhythm is short, the processing process is stable, and the product precision is ensured.

[0023] The end cover pin hole 11 and the inner gear ring pin hole 42 in the utility model adopt an inner hole chamfer structure, the end cover pin hole 11 and the inner gear ring pin hole 42 are in clearance fit with the positioning pin 2, the wall thickness of the press-in position is increased, so that the outer wall of the press-in position of the inner gear ring 4 and the end cover 1 is not damaged when the positioning pin 2 is press-fitted, and the pulling force requirement between the press-in end cover 1 and the inner gear ring 4 is ensured.

[0024] The guide ring 41 of the end cover 1 and the inner gear ring 4 in the embodiment adopts interference fit, the groove 43 of the inner gear ring 4 and the positioning groove 14 on the end cover 1 are press-fitted on the same straight line through the two positioning pins 2, so that the end cover 1 is ensured not to fall off, and the position degree of the positioning groove 14 on the end cover 1 and the groove 43 on the inner gear ring 4 is ensured to be consistent.

[0025] In addition, it should be noted that equivalent changes or simple changes made according to the structure, features and principles of the utility model patent concept are included in the protection scope of the utility model patent.

Claims

1. A split ring gear assembly, characterized by: It comprises an end cover, a positioning pin, a bearing and an inner gear ring, the bearing is press-fitted in the end cover, the end cover is press-fitted on the inner gear ring through the positioning pin; The upper surface of the end cover is provided with a convex ring coaxial with the end cover, a plurality of convex blocks are distributed around the convex ring, and positioning grooves are formed between the convex blocks, and an end cover pin hole is arranged on the end cover; The top of the inner gear ring is provided with a guide ring, the guide ring is provided with an inner gear ring pin hole, and the bottom of the inner gear ring is provided with a plurality of grooves; The end cover pin hole and the positioning pin are in clearance fit, and the inner gear ring pin hole and the positioning pin are in clearance fit. The bearing is in interference fit with the end cover, and the inner gear ring is in interference fit with the end cover.

2. The split ring gear assembly of claim 1, wherein: The end cover pin hole and the inner gear ring pin hole adopt an inner hole chamfer structure.

3. The split ring gear assembly of claim 1, wherein: The positioning pin is a cylindrical pin.

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