A rigid wheel concentricity calibration fixture for harmonic reducer assembly

Abstract

This utility model relates to the field of harmonic reducer manufacturing technology, and more particularly to a rigid wheel concentricity calibration fixture for assembling harmonic reducers. The fixture includes a positioning component and a deformation component connected to the front end of the positioning component. The positioning component includes a bottom flange connected to the rear end of the deformation component, a concentric screw pre-drilled hole at the rear end of the bottom flange, a screw pre-drilled groove at the front end of the bottom flange, a positioning flange connected to the front end of the bottom flange, a crossed roller bearing installed inside the positioning flange, and a flexible wheel body installed inside the positioning flange. This utility model, by providing a deformation pre-drilled groove and a conical surface mating structure on the harmonic reducer, allows the pre-drilled groove to provide controllable elastic deformation space for the flange to compensate for errors during press-fitting, while the conical surface provides precise guidance. The combined effect of these two features enables the rigid wheel to automatically calibrate concentricity during assembly, reducing repeated manual adjustments and effectively improving overall assembly efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of harmonic reducer manufacturing technology, and in particular to a rigid wheel concentricity calibration fixture for assembling harmonic reducers. Background Technology

[0002] Harmonic reducers are classified into two types according to the flexible wheel structure: hat type and cup type. Hat type and cup type harmonic reducers are suitable for different installation requirements. They usually use a wave generator as the input shaft, and either the flexible wheel or the rigid wheel can be used as the fixed end or the output end. The reduction ratio and torque transmission functions are achieved through the difference in the number of teeth between the flexible wheel and the rigid wheel.

[0003] Traditional hat-shaped rigid wheel assembly fixtures mostly adopt a rigid press-fit structure, which presses the rigid wheel into the inner ring of the cross bearing through mechanical cooperation. However, due to the machining tolerances of the rigid wheel and the cross bearing and the elastic deformation of the material, the concentricity is easily out of tolerance during the press-fit process, which requires manual secondary correction and affects the assembly efficiency. Although some fixtures adopt a guide cone surface design, they cannot compensate for local deformation during the assembly process, making it difficult to meet the high precision requirements for the coaxiality of the rigid wheel and the cross bearing. Utility Model Content

[0004] To overcome the problem that existing fixtures, due to machining tolerances and elastic deformation of materials in rigid wheels and cross bearings, easily lead to concentricity deviations during press fitting, requiring secondary manual correction and affecting assembly efficiency; and that although some fixtures adopt a guide cone surface design, they cannot compensate for local deformation during assembly, making it difficult to meet high-precision requirements for the coaxiality of rigid wheels and cross bearings.

[0005] The technical solution of this utility model is: a rigid wheel concentricity calibration fixture for assembling a harmonic reducer, comprising a positioning component and a deformation component connected to the front end of the positioning component;

[0006] The positioning assembly includes a bottom flange connected to the rear end of the deformation assembly, a concentric screw pre-drilled hole opened at the rear end of the bottom flange, a screw pre-drilled groove opened at the front end of the bottom flange, a positioning flange connected to the front end of the bottom flange, a cross roller bearing installed inside the positioning flange, a flexible wheel body installed inside the positioning flange, a rigid wheel body installed inside the positioning flange, a sealing ring groove opened at the bottom of the cross roller bearing, a skeleton oil seal installed inside the sealing ring groove, a concentric connecting locking block installed in the middle of the front end of the bottom flange, and a concentric connecting screw installed inside the concentric screw pre-drilled hole.

[0007] The deformation assembly includes a first concentric flange connected to the front end of the positioning flange, a first deformation reserved groove opened at the rear end of the first concentric flange, a second concentric flange connected to the front end of the first concentric flange, a reserved hole for positioning screws opened at the front end of the second concentric flange, a reserved hole for connecting screws opened at the front end of the second concentric flange, a flange connecting screw installed inside the reserved hole for connecting screws, and a second deformation reserved groove opened at the rear end of the second concentric flange.

[0008] Preferably, the crossed roller bearing is composed of an inner ring, an outer ring, and bearing rollers, and the crossed roller bearing and the concentric flange are interference-fitted by a skeleton oil seal.

[0009] Preferably, both the outer wall of the flexible wheel body and the inner wall of the rigid wheel body are provided with involute teeth, and the teeth on the outer wall of the flexible wheel body and the inner wall of the rigid wheel body mesh with each other.

[0010] Preferably, the flexible wheel body has a thin-walled cap-shaped structure and is fixedly connected by screws and screw slots.

[0011] Preferably, the concentric locking block has screw holes at both the front and rear ends. The concentric locking block is fixedly connected to the bottom flange through the screw hole at the rear end and the concentric connecting screw, and is fixedly connected to the concentric flange II through the screw hole at the front end and the concentric connecting screw.

[0012] Preferably, both the first deformation reserved groove and the second deformation reserved groove are evenly distributed around the circumference.

[0013] The beneficial effects of this utility model are:

[0014] This utility model features a deformation pre-reserved groove and a conical surface mating structure on the harmonic reducer. During the press-fitting process, the pre-reserved groove provides a controllable elastic deformation space for the flange to compensate for errors, while the conical surface plays a precise guiding role. The two work together to enable the rigid wheel to automatically calibrate concentricity during assembly, reducing repeated manual adjustments and effectively improving the overall assembly efficiency and accuracy. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0016] Figure 2 The diagram shown is a cross-sectional view of the present invention.

[0017] Figure 3 The diagram shown is a cross-sectional view of the positioning component of this utility model.

[0018] Figure 4 The diagram shown is a cross-sectional view of the deformation component of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Positioning component; 2. Deformation component; 101. Bottom flange; 102. Concentric screw pre-drilled hole; 103. Screw pre-drilled groove; 104. Positioning flange; 105. Crossed roller bearing; 106. Flexible wheel body; 107. Rigid wheel body; 108. Sealing ring groove; 109. Skeleton oil seal; 110. Concentric connection locking block; 111. Concentric connection screw; 201. Concentric flange one; 202. Deformation pre-drilled groove one; 203. Concentric flange two; 204. Positioning screw pre-drilled hole; 205. Connection screw pre-drilled hole; 206. Flange connection screw; 207. Deformation pre-drilled groove two. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] A rigid wheel concentricity calibration fixture for harmonic reducer assembly, based on Figures 1-4 As shown, it includes a positioning component 1 and a deformation component 2 connected to the front end of the positioning component 1;

[0022] The positioning assembly 1 includes a bottom flange 101 connected to the rear end of the deformation assembly 2, a concentric screw pre-drilled hole 102 opened at the rear end of the bottom flange 101, a screw pre-drilled groove 103 opened at the front end of the bottom flange 101, a positioning flange 104 connected to the front end of the bottom flange 101, a cross roller bearing 105 installed inside the positioning flange 104, a flexible wheel body 106 installed inside the positioning flange 104, a rigid wheel body 107 installed inside the positioning flange 104, a sealing ring groove 108 opened at the bottom of the cross roller bearing 105, a skeleton oil seal 109 installed inside the sealing ring groove 108, a concentric connecting locking block 110 installed in the middle of the front end of the bottom flange 101, and a concentric connecting screw 111 installed inside the concentric screw pre-drilled hole 102.

[0023] The deformation assembly 2 includes a concentric flange 201 connected to the front end of the positioning flange 104, a deformation reserved groove 202 opened at the rear end of the concentric flange 201, a concentric flange 203 connected to the front end of the concentric flange 201, a positioning screw reserved hole 204 opened at the front end of the concentric flange 203, a connecting screw reserved hole 205 opened at the front end of the concentric flange 203, a flange connecting screw 206 installed inside the connecting screw reserved hole 205, and a deformation reserved groove 207 opened at the rear end of the concentric flange 203.

[0024] according to Figure 2 and Figure 3 As shown, the crossed roller bearing 105 is composed of an inner ring, an outer ring, and bearing rollers, and the crossed roller bearing 105 and the concentric flange 201 are interference-fitted through the skeleton oil seal 109.

[0025] It should be noted that the outer ring of the crossed roller bearing 105 is installed inside the positioning flange 104, and bearing rollers are assembled inside the outer ring. The bearing rollers form a rolling fit with the inner ring, and the skeleton oil seal 109 ensures that the crossed roller bearing 105 will not leak grease during operation.

[0026] according to Figure 2 and Figure 3 As shown, both the outer wall of the flexible wheel body 106 and the inner wall of the rigid wheel body 107 are provided with involute teeth, and the teeth on the outer wall of the flexible wheel body 106 and the inner wall of the rigid wheel body 107 mesh with each other.

[0027] It should be noted that the meshing area of ​​the flexible wheel body 106 and the rigid wheel body 107 is radially positioned through the interference fit between the entire crossed roller bearing 105 and the concentric flange 201, ensuring transmission accuracy.

[0028] according to Figure 2 and Figure 3 As shown, the flexible wheel body 106 has a thin-walled cap-shaped structure and is fixedly connected by screws and screw pre-reserved slots 103.

[0029] It should be noted that by fixing the flexible wheel body 106 to the bottom flange 101 with screws, the flexible wheel body 106 can withstand greater axial tensile force, shear force and impact force after fixed installation.

[0030] according to Figures 1-4 As shown, the concentric locking block 110 has screw holes at both the front and rear ends. The concentric locking block 110 is fixedly connected to the bottom flange 101 through the screw hole at the rear end and the concentric connecting screw 111, and is fixedly connected to the concentric flange 203 through the screw hole at the front end and the concentric connecting screw 111.

[0031] It should be noted that the concentric locking block 110 is first fixedly connected to the bottom flange 101, and then fixedly connected to the second concentric flange 203 to ensure the coaxiality of the two flanges.

[0032] according to Figure 1 and Figure 4 As shown, both deformation reserved groove 1 202 and deformation reserved groove 207 are evenly distributed around the circumference.

[0033] It should be noted that after the concentric flange 201 and the bottom flange 101 are locked together by the concentric connecting locking block 110, the resulting compressive force causes the conical surfaces at the rear ends of the concentric flange 201 and the bottom flange 203 to deform. Furthermore, since the deformation reserved grooves 202 and 207 are both circumferentially evenly distributed, the deformation can be uniformly squeezed inward, and there will be no phenomenon of one end deforming and the other end not deforming.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A jig for calibrating the concentricity of a rigid wheel in the assembly of a harmonic reducer, characterized in that: It includes a positioning component (1) and a deformation component (2) connected to the front end of the positioning component (1); The positioning component (1) includes a bottom flange (101) connected to the rear end of the deformation component (2), a concentric screw pre-drilled hole (102) opened at the rear end of the bottom flange (101), a screw pre-drilled groove (103) opened at the front end of the bottom flange (101), a positioning flange (104) connected to the front end of the bottom flange (101), a cross roller bearing (105) installed inside the positioning flange (104), a flexible wheel body (106) installed inside the positioning flange (104), a rigid wheel body (107) installed inside the positioning flange (104), a sealing ring groove (108) opened at the bottom of the cross roller bearing (105), a skeleton oil seal (109) installed inside the sealing ring groove (108), a concentric connecting locking block (110) installed in the middle of the front end of the bottom flange (101), and a concentric connecting screw (111) installed inside the concentric screw pre-drilled hole (102). The deformation assembly (2) includes a first concentric flange (201) connected to the front end of the positioning flange (104), a first deformation reserved groove (202) opened at the rear end of the first concentric flange (201), a second concentric flange (203) connected to the front end of the first concentric flange (201), a positioning screw reserved hole (204) opened at the front end of the second concentric flange (203), a connecting screw reserved hole (205) opened at the front end of the second concentric flange (203), a flange connecting screw (206) installed inside the connecting screw reserved hole (205), and a second deformation reserved groove (207) opened at the rear end of the second concentric flange (203).

2. The rigid wheel concentricity calibration fixture for harmonic reducer assembly according to claim 1, characterized in that: The crossed roller bearing (105) is composed of an inner ring, an outer ring, and bearing rollers, and the crossed roller bearing (105) and the concentric flange (201) are interference-fitted by a skeleton oil seal (109).

3. The rigid wheel concentricity calibration fixture for harmonic reducer assembly according to claim 1, characterized in that: Both the outer wall of the flexible wheel body (106) and the inner wall of the rigid wheel body (107) are provided with involute teeth, and the teeth on the outer wall of the flexible wheel body (106) and the inner wall of the rigid wheel body (107) mesh with each other.

4. A rigid wheel concentricity calibration fixture for harmonic reducer assembly according to claim 1, characterized in that: The flexible wheel body (106) has a thin-walled cap-shaped structure and is fixedly connected by screws and screw pre-reserved slots (103).

5. A rigid wheel concentricity calibration fixture for harmonic reducer assembly according to claim 1, characterized in that: The concentric locking block (110) has screw holes at both the front and rear ends. The concentric locking block (110) is fixedly connected to the bottom flange (101) through the screw hole at the rear end and the concentric connecting screw (111), and is fixedly connected to the second concentric flange (203) through the screw hole at the front end and the concentric connecting screw (111).

6. A rigid wheel concentricity calibration fixture for harmonic reducer assembly according to claim 1, characterized in that: Both the first deformation reserved groove (202) and the second deformation reserved groove (207) are evenly distributed around the circumference.

Images